ct_lib.o: ../../include/openssl/tls1.h ../../include/openssl/x509.h
ct_lib.o: ../../include/openssl/x509_vfy.h ../../ssl/packet_locl.h
ct_lib.o: ../../ssl/record/record.h ../../ssl/ssl_locl.h
-ct_lib.o: ../include/internal/cryptlib.h ../include/internal/ct_int.h ct_lib.c
+ct_lib.o: ../../ssl/statem/statem.h ../include/internal/cryptlib.h
+ct_lib.o: ../include/internal/ct_int.h ct_lib.c
LIB=$(TOP)/libssl.a
SHARED_LIB= libssl$(SHLIB_EXT)
LIBSRC= \
- s3_srvr.c s3_clnt.c s3_lib.c s3_enc.c record/rec_layer_s3.c \
- s3_both.c s3_cbc.c s3_msg.c \
- t1_meth.c t1_srvr.c t1_clnt.c t1_lib.c t1_enc.c t1_ext.c \
- d1_meth.c d1_srvr.c d1_clnt.c d1_lib.c record/rec_layer_d1.c d1_msg.c \
- d1_both.c d1_srtp.c \
+ statem/statem_srvr.c statem/statem_clnt.c s3_lib.c s3_enc.c record/rec_layer_s3.c \
+ statem/statem_lib.c s3_cbc.c s3_msg.c \
+ methods.c t1_lib.c t1_enc.c t1_ext.c \
+ d1_lib.c record/rec_layer_d1.c d1_msg.c \
+ statem/statem_dtls.c d1_srtp.c \
ssl_lib.c ssl_err2.c ssl_cert.c ssl_sess.c \
ssl_ciph.c ssl_stat.c ssl_rsa.c \
ssl_asn1.c ssl_txt.c ssl_algs.c ssl_conf.c \
bio_ssl.c ssl_err.c t1_reneg.c tls_srp.c t1_trce.c ssl_utst.c \
record/ssl3_buffer.c record/ssl3_record.c record/dtls1_bitmap.c \
- statem.c
+ statem/statem.c
LIBOBJ= \
- s3_srvr.o s3_clnt.o s3_lib.o s3_enc.o record/rec_layer_s3.o \
- s3_both.o s3_cbc.o s3_msg.o \
- t1_meth.o t1_srvr.o t1_clnt.o t1_lib.o t1_enc.o t1_ext.o \
- d1_meth.o d1_srvr.o d1_clnt.o d1_lib.o record/rec_layer_d1.o d1_msg.o \
- d1_both.o d1_srtp.o\
+ statem/statem_srvr.o statem/statem_clnt.o s3_lib.o s3_enc.o record/rec_layer_s3.o \
+ statem/statem_lib.o s3_cbc.o s3_msg.o \
+ methods.o t1_lib.o t1_enc.o t1_ext.o \
+ d1_lib.o record/rec_layer_d1.o d1_msg.o \
+ statem/statem_dtls.o d1_srtp.o\
ssl_lib.o ssl_err2.o ssl_cert.o ssl_sess.o \
ssl_ciph.o ssl_stat.o ssl_rsa.o \
ssl_asn1.o ssl_txt.o ssl_algs.o ssl_conf.o \
bio_ssl.o ssl_err.o t1_reneg.o tls_srp.o t1_trce.o ssl_utst.o \
record/ssl3_buffer.o record/ssl3_record.o record/dtls1_bitmap.o \
- statem.o
+ statem/statem.o
SRC= $(LIBSRC)
-HEADER= ssl_locl.h record/record_locl.h record/record.h
+HEADER= ssl_locl.h record/record_locl.h record/record.h statem/statem.h
ALL= $(GENERAL) $(SRC) $(HEADER)
rm -f $(LIBOBJ) *.obj lib tags core .pure .nfs* *.old *.bak fluff
rm -f record/*.obj record/lib record/retags record/core \
record/.pure record/.nfs* record/*.old record/*.bak record/fluff
-
+ rm -f statem/*.obj statem/lib statem/retags statem/core \
+ statem/.pure statem/.nfs* statem/*.old statem/*.bak statem/fluff
+
# DO NOT DELETE THIS LINE -- make depend depends on it.
bio_ssl.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
bio_ssl.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
bio_ssl.o: ../include/openssl/tls1.h ../include/openssl/x509.h
bio_ssl.o: ../include/openssl/x509_vfy.h bio_ssl.c packet_locl.h
-bio_ssl.o: record/record.h ssl_locl.h
-d1_both.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-d1_both.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-d1_both.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-d1_both.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-d1_both.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-d1_both.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-d1_both.o: ../include/openssl/err.h ../include/openssl/evp.h
-d1_both.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-d1_both.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-d1_both.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-d1_both.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-d1_both.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-d1_both.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-d1_both.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-d1_both.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-d1_both.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-d1_both.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-d1_both.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-d1_both.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h d1_both.c
-d1_both.o: packet_locl.h record/record.h ssl_locl.h
-d1_clnt.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-d1_clnt.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-d1_clnt.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-d1_clnt.o: ../include/openssl/dh.h ../include/openssl/dsa.h
-d1_clnt.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
-d1_clnt.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
-d1_clnt.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
-d1_clnt.o: ../include/openssl/evp.h ../include/openssl/hmac.h
-d1_clnt.o: ../include/openssl/lhash.h ../include/openssl/md5.h
-d1_clnt.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-d1_clnt.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-d1_clnt.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-d1_clnt.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-d1_clnt.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-d1_clnt.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-d1_clnt.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-d1_clnt.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-d1_clnt.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-d1_clnt.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-d1_clnt.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h d1_clnt.c
-d1_clnt.o: packet_locl.h record/record.h ssl_locl.h
+bio_ssl.o: record/record.h ssl_locl.h statem/statem.h
d1_lib.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
d1_lib.o: ../include/openssl/bn.h ../include/openssl/buffer.h
d1_lib.o: ../include/openssl/comp.h ../include/openssl/crypto.h
d1_lib.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
d1_lib.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
d1_lib.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-d1_lib.o: ../include/openssl/pqueue.h ../include/openssl/rsa.h
-d1_lib.o: ../include/openssl/safestack.h ../include/openssl/sha.h
-d1_lib.o: ../include/openssl/srtp.h ../include/openssl/ssl.h
-d1_lib.o: ../include/openssl/ssl2.h ../include/openssl/ssl3.h
-d1_lib.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
-d1_lib.o: ../include/openssl/tls1.h ../include/openssl/x509.h
-d1_lib.o: ../include/openssl/x509_vfy.h d1_lib.c packet_locl.h record/record.h
-d1_lib.o: ssl_locl.h
-d1_meth.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-d1_meth.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-d1_meth.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-d1_meth.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-d1_meth.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-d1_meth.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-d1_meth.o: ../include/openssl/err.h ../include/openssl/evp.h
-d1_meth.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-d1_meth.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-d1_meth.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-d1_meth.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-d1_meth.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-d1_meth.o: ../include/openssl/pqueue.h ../include/openssl/rsa.h
-d1_meth.o: ../include/openssl/safestack.h ../include/openssl/sha.h
-d1_meth.o: ../include/openssl/srtp.h ../include/openssl/ssl.h
-d1_meth.o: ../include/openssl/ssl2.h ../include/openssl/ssl3.h
-d1_meth.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
-d1_meth.o: ../include/openssl/tls1.h ../include/openssl/x509.h
-d1_meth.o: ../include/openssl/x509_vfy.h d1_meth.c packet_locl.h
-d1_meth.o: record/record.h ssl_locl.h
+d1_lib.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+d1_lib.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+d1_lib.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+d1_lib.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+d1_lib.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+d1_lib.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+d1_lib.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h d1_lib.c
+d1_lib.o: packet_locl.h record/record.h ssl_locl.h statem/statem.h
d1_msg.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
d1_msg.o: ../include/openssl/bn.h ../include/openssl/buffer.h
d1_msg.o: ../include/openssl/comp.h ../include/openssl/crypto.h
d1_msg.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
d1_msg.o: ../include/openssl/tls1.h ../include/openssl/x509.h
d1_msg.o: ../include/openssl/x509_vfy.h d1_msg.c packet_locl.h record/record.h
-d1_msg.o: ssl_locl.h
+d1_msg.o: ssl_locl.h statem/statem.h
d1_srtp.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
d1_srtp.o: ../include/openssl/bn.h ../include/openssl/buffer.h
d1_srtp.o: ../include/openssl/comp.h ../include/openssl/crypto.h
d1_srtp.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
d1_srtp.o: ../include/openssl/tls1.h ../include/openssl/x509.h
d1_srtp.o: ../include/openssl/x509_vfy.h d1_srtp.c packet_locl.h
-d1_srtp.o: record/record.h ssl_locl.h
-d1_srvr.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-d1_srvr.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-d1_srvr.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-d1_srvr.o: ../include/openssl/dh.h ../include/openssl/dsa.h
-d1_srvr.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
-d1_srvr.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
-d1_srvr.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
-d1_srvr.o: ../include/openssl/evp.h ../include/openssl/hmac.h
-d1_srvr.o: ../include/openssl/lhash.h ../include/openssl/md5.h
-d1_srvr.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-d1_srvr.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-d1_srvr.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-d1_srvr.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-d1_srvr.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-d1_srvr.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-d1_srvr.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-d1_srvr.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-d1_srvr.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-d1_srvr.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-d1_srvr.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h d1_srvr.c
-d1_srvr.o: packet_locl.h record/record.h ssl_locl.h
+d1_srtp.o: record/record.h ssl_locl.h statem/statem.h
+methods.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
+methods.o: ../include/openssl/bn.h ../include/openssl/buffer.h
+methods.o: ../include/openssl/comp.h ../include/openssl/crypto.h
+methods.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
+methods.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
+methods.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
+methods.o: ../include/openssl/err.h ../include/openssl/evp.h
+methods.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
+methods.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
+methods.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
+methods.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+methods.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+methods.o: ../include/openssl/pqueue.h ../include/openssl/rsa.h
+methods.o: ../include/openssl/safestack.h ../include/openssl/sha.h
+methods.o: ../include/openssl/srtp.h ../include/openssl/ssl.h
+methods.o: ../include/openssl/ssl2.h ../include/openssl/ssl3.h
+methods.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
+methods.o: ../include/openssl/tls1.h ../include/openssl/x509.h
+methods.o: ../include/openssl/x509_vfy.h methods.c packet_locl.h
+methods.o: record/record.h ssl_locl.h statem/statem.h
record/dtls1_bitmap.o: ../e_os.h ../include/openssl/asn1.h
record/dtls1_bitmap.o: ../include/openssl/bio.h ../include/openssl/bn.h
record/dtls1_bitmap.o: ../include/openssl/buffer.h ../include/openssl/comp.h
record/dtls1_bitmap.o: ../include/openssl/tls1.h ../include/openssl/x509.h
record/dtls1_bitmap.o: ../include/openssl/x509_vfy.h record/../packet_locl.h
record/dtls1_bitmap.o: record/../record/record.h record/../ssl_locl.h
-record/dtls1_bitmap.o: record/dtls1_bitmap.c record/record_locl.h
+record/dtls1_bitmap.o: record/../statem/statem.h record/dtls1_bitmap.c
+record/dtls1_bitmap.o: record/record_locl.h
record/rec_layer_d1.o: ../e_os.h ../include/openssl/asn1.h
record/rec_layer_d1.o: ../include/openssl/bio.h ../include/openssl/bn.h
record/rec_layer_d1.o: ../include/openssl/buffer.h ../include/openssl/comp.h
record/rec_layer_d1.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
record/rec_layer_d1.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
record/rec_layer_d1.o: record/../packet_locl.h record/../record/record.h
-record/rec_layer_d1.o: record/../ssl_locl.h record/rec_layer_d1.c
-record/rec_layer_d1.o: record/record_locl.h
+record/rec_layer_d1.o: record/../ssl_locl.h record/../statem/statem.h
+record/rec_layer_d1.o: record/rec_layer_d1.c record/record_locl.h
record/rec_layer_s3.o: ../e_os.h ../include/openssl/asn1.h
record/rec_layer_s3.o: ../include/openssl/bio.h ../include/openssl/bn.h
record/rec_layer_s3.o: ../include/openssl/buffer.h ../include/openssl/comp.h
record/rec_layer_s3.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
record/rec_layer_s3.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
record/rec_layer_s3.o: record/../packet_locl.h record/../record/record.h
-record/rec_layer_s3.o: record/../ssl_locl.h record/rec_layer_s3.c
-record/rec_layer_s3.o: record/record_locl.h
+record/rec_layer_s3.o: record/../ssl_locl.h record/../statem/statem.h
+record/rec_layer_s3.o: record/rec_layer_s3.c record/record_locl.h
record/ssl3_buffer.o: ../e_os.h ../include/openssl/asn1.h
record/ssl3_buffer.o: ../include/openssl/bio.h ../include/openssl/bn.h
record/ssl3_buffer.o: ../include/openssl/buffer.h ../include/openssl/comp.h
record/ssl3_buffer.o: ../include/openssl/tls1.h ../include/openssl/x509.h
record/ssl3_buffer.o: ../include/openssl/x509_vfy.h record/../packet_locl.h
record/ssl3_buffer.o: record/../record/record.h record/../ssl_locl.h
-record/ssl3_buffer.o: record/record_locl.h record/ssl3_buffer.c
+record/ssl3_buffer.o: record/../statem/statem.h record/record_locl.h
+record/ssl3_buffer.o: record/ssl3_buffer.c
record/ssl3_record.o: ../e_os.h ../include/internal/constant_time_locl.h
record/ssl3_record.o: ../include/openssl/asn1.h ../include/openssl/bio.h
record/ssl3_record.o: ../include/openssl/bn.h ../include/openssl/buffer.h
record/ssl3_record.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
record/ssl3_record.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
record/ssl3_record.o: record/../packet_locl.h record/../record/record.h
-record/ssl3_record.o: record/../ssl_locl.h record/record_locl.h
-record/ssl3_record.o: record/ssl3_record.c
-s3_both.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-s3_both.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-s3_both.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-s3_both.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-s3_both.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-s3_both.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-s3_both.o: ../include/openssl/err.h ../include/openssl/evp.h
-s3_both.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-s3_both.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-s3_both.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-s3_both.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-s3_both.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-s3_both.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-s3_both.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-s3_both.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-s3_both.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-s3_both.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-s3_both.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-s3_both.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-s3_both.o: packet_locl.h record/record.h s3_both.c ssl_locl.h
+record/ssl3_record.o: record/../ssl_locl.h record/../statem/statem.h
+record/ssl3_record.o: record/record_locl.h record/ssl3_record.c
s3_cbc.o: ../e_os.h ../include/internal/constant_time_locl.h
s3_cbc.o: ../include/openssl/asn1.h ../include/openssl/bio.h
s3_cbc.o: ../include/openssl/bn.h ../include/openssl/buffer.h
s3_cbc.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
s3_cbc.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
s3_cbc.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h packet_locl.h
-s3_cbc.o: record/record.h s3_cbc.c ssl_locl.h
-s3_clnt.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-s3_clnt.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-s3_clnt.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-s3_clnt.o: ../include/openssl/dh.h ../include/openssl/dsa.h
-s3_clnt.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
-s3_clnt.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
-s3_clnt.o: ../include/openssl/ecdsa.h ../include/openssl/engine.h
-s3_clnt.o: ../include/openssl/err.h ../include/openssl/evp.h
-s3_clnt.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-s3_clnt.o: ../include/openssl/md5.h ../include/openssl/obj_mac.h
-s3_clnt.o: ../include/openssl/objects.h ../include/openssl/opensslconf.h
-s3_clnt.o: ../include/openssl/opensslv.h ../include/openssl/ossl_typ.h
-s3_clnt.o: ../include/openssl/pem.h ../include/openssl/pem2.h
-s3_clnt.o: ../include/openssl/pkcs7.h ../include/openssl/pqueue.h
-s3_clnt.o: ../include/openssl/rand.h ../include/openssl/rsa.h
-s3_clnt.o: ../include/openssl/safestack.h ../include/openssl/sha.h
-s3_clnt.o: ../include/openssl/srtp.h ../include/openssl/ssl.h
-s3_clnt.o: ../include/openssl/ssl2.h ../include/openssl/ssl3.h
-s3_clnt.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
-s3_clnt.o: ../include/openssl/tls1.h ../include/openssl/x509.h
-s3_clnt.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-s3_clnt.o: s3_clnt.c ssl_locl.h
+s3_cbc.o: record/record.h s3_cbc.c ssl_locl.h statem/statem.h
s3_enc.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
s3_enc.o: ../include/openssl/bn.h ../include/openssl/buffer.h
s3_enc.o: ../include/openssl/comp.h ../include/openssl/crypto.h
s3_enc.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
s3_enc.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
s3_enc.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h packet_locl.h
-s3_enc.o: record/record.h s3_enc.c ssl_locl.h
+s3_enc.o: record/record.h s3_enc.c ssl_locl.h statem/statem.h
s3_lib.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
s3_lib.o: ../include/openssl/bn.h ../include/openssl/buffer.h
s3_lib.o: ../include/openssl/comp.h ../include/openssl/crypto.h
s3_lib.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
s3_lib.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
s3_lib.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h packet_locl.h
-s3_lib.o: record/record.h s3_lib.c ssl_locl.h
+s3_lib.o: record/record.h s3_lib.c ssl_locl.h statem/statem.h
s3_msg.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
s3_msg.o: ../include/openssl/bn.h ../include/openssl/buffer.h
s3_msg.o: ../include/openssl/comp.h ../include/openssl/crypto.h
s3_msg.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
s3_msg.o: ../include/openssl/tls1.h ../include/openssl/x509.h
s3_msg.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h s3_msg.c
-s3_msg.o: ssl_locl.h
-s3_srvr.o: ../e_os.h ../include/internal/constant_time_locl.h
-s3_srvr.o: ../include/openssl/asn1.h ../include/openssl/bio.h
-s3_srvr.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-s3_srvr.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-s3_srvr.o: ../include/openssl/dh.h ../include/openssl/dsa.h
-s3_srvr.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
-s3_srvr.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
-s3_srvr.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
-s3_srvr.o: ../include/openssl/evp.h ../include/openssl/hmac.h
-s3_srvr.o: ../include/openssl/lhash.h ../include/openssl/md5.h
-s3_srvr.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-s3_srvr.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-s3_srvr.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-s3_srvr.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-s3_srvr.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-s3_srvr.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-s3_srvr.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-s3_srvr.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-s3_srvr.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-s3_srvr.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-s3_srvr.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-s3_srvr.o: packet_locl.h record/record.h s3_srvr.c ssl_locl.h
+s3_msg.o: ssl_locl.h statem/statem.h
ssl_algs.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_algs.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_algs.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_algs.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_algs.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_algs.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_algs.o: ssl_algs.c ssl_locl.h
+ssl_algs.o: ssl_algs.c ssl_locl.h statem/statem.h
ssl_asn1.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/asn1t.h
ssl_asn1.o: ../include/openssl/bio.h ../include/openssl/bn.h
ssl_asn1.o: ../include/openssl/buffer.h ../include/openssl/comp.h
ssl_asn1.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
ssl_asn1.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
ssl_asn1.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-ssl_asn1.o: packet_locl.h record/record.h ssl_asn1.c ssl_locl.h
+ssl_asn1.o: packet_locl.h record/record.h ssl_asn1.c ssl_locl.h statem/statem.h
ssl_cert.o: ../e_os.h ../include/internal/o_dir.h ../include/openssl/asn1.h
ssl_cert.o: ../include/openssl/bio.h ../include/openssl/bn.h
ssl_cert.o: ../include/openssl/buffer.h ../include/openssl/comp.h
ssl_cert.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
ssl_cert.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
ssl_cert.o: ../include/openssl/x509v3.h packet_locl.h record/record.h
-ssl_cert.o: ssl_cert.c ssl_locl.h
+ssl_cert.o: ssl_cert.c ssl_locl.h statem/statem.h
ssl_ciph.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_ciph.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_ciph.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_ciph.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
ssl_ciph.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
ssl_ciph.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-ssl_ciph.o: packet_locl.h record/record.h ssl_ciph.c ssl_locl.h
+ssl_ciph.o: packet_locl.h record/record.h ssl_ciph.c ssl_locl.h statem/statem.h
ssl_conf.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_conf.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_conf.o: ../include/openssl/comp.h ../include/openssl/conf.h
ssl_conf.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_conf.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_conf.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_conf.o: ssl_conf.c ssl_locl.h
+ssl_conf.o: ssl_conf.c ssl_locl.h statem/statem.h
ssl_err.o: ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_err.o: ../include/openssl/buffer.h ../include/openssl/comp.h
ssl_err.o: ../include/openssl/crypto.h ../include/openssl/dtls1.h
ssl_lib.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
ssl_lib.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
ssl_lib.o: ../include/openssl/x509v3.h packet_locl.h record/record.h ssl_lib.c
-ssl_lib.o: ssl_locl.h
+ssl_lib.o: ssl_locl.h statem/statem.h
ssl_rsa.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_rsa.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_rsa.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_rsa.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_rsa.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_rsa.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_rsa.o: ssl_locl.h ssl_rsa.c
+ssl_rsa.o: ssl_locl.h ssl_rsa.c statem/statem.h
ssl_sess.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_sess.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_sess.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_sess.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_sess.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_sess.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_sess.o: ssl_locl.h ssl_sess.c
+ssl_sess.o: ssl_locl.h ssl_sess.c statem/statem.h
ssl_stat.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_stat.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_stat.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_stat.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_stat.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_stat.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_stat.o: ssl_locl.h ssl_stat.c
+ssl_stat.o: ssl_locl.h ssl_stat.c statem/statem.h
ssl_txt.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_txt.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_txt.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_txt.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_txt.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_txt.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_txt.o: ssl_locl.h ssl_txt.c
+ssl_txt.o: ssl_locl.h ssl_txt.c statem/statem.h
ssl_utst.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
ssl_utst.o: ../include/openssl/bn.h ../include/openssl/buffer.h
ssl_utst.o: ../include/openssl/comp.h ../include/openssl/crypto.h
ssl_utst.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
ssl_utst.o: ../include/openssl/tls1.h ../include/openssl/x509.h
ssl_utst.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-ssl_utst.o: ssl_locl.h ssl_utst.c
-statem.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-statem.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-statem.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-statem.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-statem.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-statem.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-statem.o: ../include/openssl/err.h ../include/openssl/evp.h
-statem.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-statem.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-statem.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-statem.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-statem.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-statem.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-statem.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-statem.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-statem.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-statem.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-statem.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-statem.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h packet_locl.h
-statem.o: record/record.h ssl_locl.h statem.c
-t1_clnt.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-t1_clnt.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-t1_clnt.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-t1_clnt.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-t1_clnt.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-t1_clnt.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-t1_clnt.o: ../include/openssl/err.h ../include/openssl/evp.h
-t1_clnt.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-t1_clnt.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-t1_clnt.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-t1_clnt.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-t1_clnt.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-t1_clnt.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-t1_clnt.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-t1_clnt.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-t1_clnt.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-t1_clnt.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-t1_clnt.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-t1_clnt.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-t1_clnt.o: packet_locl.h record/record.h ssl_locl.h t1_clnt.c
+ssl_utst.o: ssl_locl.h ssl_utst.c statem/statem.h
+statem/statem.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
+statem/statem.o: ../include/openssl/bn.h ../include/openssl/buffer.h
+statem/statem.o: ../include/openssl/comp.h ../include/openssl/crypto.h
+statem/statem.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
+statem/statem.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
+statem/statem.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
+statem/statem.o: ../include/openssl/err.h ../include/openssl/evp.h
+statem/statem.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
+statem/statem.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
+statem/statem.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
+statem/statem.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+statem/statem.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+statem/statem.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+statem/statem.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+statem/statem.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+statem/statem.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+statem/statem.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+statem/statem.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+statem/statem.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
+statem/statem.o: statem/../packet_locl.h statem/../record/record.h
+statem/statem.o: statem/../ssl_locl.h statem/../statem/statem.h statem/statem.c
+statem/statem_clnt.o: ../e_os.h ../include/openssl/asn1.h
+statem/statem_clnt.o: ../include/openssl/bio.h ../include/openssl/bn.h
+statem/statem_clnt.o: ../include/openssl/buffer.h ../include/openssl/comp.h
+statem/statem_clnt.o: ../include/openssl/crypto.h ../include/openssl/dh.h
+statem/statem_clnt.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
+statem/statem_clnt.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
+statem/statem_clnt.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
+statem/statem_clnt.o: ../include/openssl/engine.h ../include/openssl/err.h
+statem/statem_clnt.o: ../include/openssl/evp.h ../include/openssl/hmac.h
+statem/statem_clnt.o: ../include/openssl/lhash.h ../include/openssl/md5.h
+statem/statem_clnt.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
+statem/statem_clnt.o: ../include/openssl/opensslconf.h
+statem/statem_clnt.o: ../include/openssl/opensslv.h
+statem/statem_clnt.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+statem/statem_clnt.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+statem/statem_clnt.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+statem/statem_clnt.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+statem/statem_clnt.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+statem/statem_clnt.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+statem/statem_clnt.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+statem/statem_clnt.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+statem/statem_clnt.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
+statem/statem_clnt.o: statem/../packet_locl.h statem/../record/record.h
+statem/statem_clnt.o: statem/../ssl_locl.h statem/../statem/statem.h
+statem/statem_clnt.o: statem/statem_clnt.c
+statem/statem_dtls.o: ../e_os.h ../include/openssl/asn1.h
+statem/statem_dtls.o: ../include/openssl/bio.h ../include/openssl/bn.h
+statem/statem_dtls.o: ../include/openssl/buffer.h ../include/openssl/comp.h
+statem/statem_dtls.o: ../include/openssl/crypto.h ../include/openssl/dsa.h
+statem/statem_dtls.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
+statem/statem_dtls.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
+statem/statem_dtls.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
+statem/statem_dtls.o: ../include/openssl/evp.h ../include/openssl/hmac.h
+statem/statem_dtls.o: ../include/openssl/lhash.h ../include/openssl/obj_mac.h
+statem/statem_dtls.o: ../include/openssl/objects.h
+statem/statem_dtls.o: ../include/openssl/opensslconf.h
+statem/statem_dtls.o: ../include/openssl/opensslv.h
+statem/statem_dtls.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+statem/statem_dtls.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+statem/statem_dtls.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+statem/statem_dtls.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+statem/statem_dtls.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+statem/statem_dtls.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+statem/statem_dtls.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+statem/statem_dtls.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+statem/statem_dtls.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
+statem/statem_dtls.o: statem/../packet_locl.h statem/../record/record.h
+statem/statem_dtls.o: statem/../ssl_locl.h statem/../statem/statem.h
+statem/statem_dtls.o: statem/statem_dtls.c
+statem/statem_lib.o: ../e_os.h ../include/openssl/asn1.h
+statem/statem_lib.o: ../include/openssl/bio.h ../include/openssl/bn.h
+statem/statem_lib.o: ../include/openssl/buffer.h ../include/openssl/comp.h
+statem/statem_lib.o: ../include/openssl/crypto.h ../include/openssl/dsa.h
+statem/statem_lib.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
+statem/statem_lib.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
+statem/statem_lib.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
+statem/statem_lib.o: ../include/openssl/evp.h ../include/openssl/hmac.h
+statem/statem_lib.o: ../include/openssl/lhash.h ../include/openssl/obj_mac.h
+statem/statem_lib.o: ../include/openssl/objects.h
+statem/statem_lib.o: ../include/openssl/opensslconf.h
+statem/statem_lib.o: ../include/openssl/opensslv.h
+statem/statem_lib.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+statem/statem_lib.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+statem/statem_lib.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+statem/statem_lib.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+statem/statem_lib.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+statem/statem_lib.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+statem/statem_lib.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+statem/statem_lib.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+statem/statem_lib.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
+statem/statem_lib.o: statem/../packet_locl.h statem/../record/record.h
+statem/statem_lib.o: statem/../ssl_locl.h statem/../statem/statem.h
+statem/statem_lib.o: statem/statem_lib.c
+statem/statem_srvr.o: ../e_os.h ../include/internal/constant_time_locl.h
+statem/statem_srvr.o: ../include/openssl/asn1.h ../include/openssl/bio.h
+statem/statem_srvr.o: ../include/openssl/bn.h ../include/openssl/buffer.h
+statem/statem_srvr.o: ../include/openssl/comp.h ../include/openssl/crypto.h
+statem/statem_srvr.o: ../include/openssl/dh.h ../include/openssl/dsa.h
+statem/statem_srvr.o: ../include/openssl/dtls1.h ../include/openssl/e_os2.h
+statem/statem_srvr.o: ../include/openssl/ec.h ../include/openssl/ecdh.h
+statem/statem_srvr.o: ../include/openssl/ecdsa.h ../include/openssl/err.h
+statem/statem_srvr.o: ../include/openssl/evp.h ../include/openssl/hmac.h
+statem/statem_srvr.o: ../include/openssl/lhash.h ../include/openssl/md5.h
+statem/statem_srvr.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
+statem/statem_srvr.o: ../include/openssl/opensslconf.h
+statem/statem_srvr.o: ../include/openssl/opensslv.h
+statem/statem_srvr.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
+statem/statem_srvr.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
+statem/statem_srvr.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
+statem/statem_srvr.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
+statem/statem_srvr.o: ../include/openssl/sha.h ../include/openssl/srtp.h
+statem/statem_srvr.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
+statem/statem_srvr.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
+statem/statem_srvr.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
+statem/statem_srvr.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
+statem/statem_srvr.o: statem/../packet_locl.h statem/../record/record.h
+statem/statem_srvr.o: statem/../ssl_locl.h statem/../statem/statem.h
+statem/statem_srvr.o: statem/statem_srvr.c
t1_enc.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
t1_enc.o: ../include/openssl/bn.h ../include/openssl/buffer.h
t1_enc.o: ../include/openssl/comp.h ../include/openssl/crypto.h
t1_enc.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
t1_enc.o: ../include/openssl/tls1.h ../include/openssl/x509.h
t1_enc.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-t1_enc.o: ssl_locl.h t1_enc.c
+t1_enc.o: ssl_locl.h statem/statem.h t1_enc.c
t1_ext.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
t1_ext.o: ../include/openssl/bn.h ../include/openssl/buffer.h
t1_ext.o: ../include/openssl/comp.h ../include/openssl/crypto.h
t1_ext.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
t1_ext.o: ../include/openssl/tls1.h ../include/openssl/x509.h
t1_ext.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-t1_ext.o: ssl_locl.h t1_ext.c
+t1_ext.o: ssl_locl.h statem/statem.h t1_ext.c
t1_lib.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
t1_lib.o: ../include/openssl/bn.h ../include/openssl/buffer.h
t1_lib.o: ../include/openssl/comp.h ../include/openssl/conf.h
t1_lib.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
t1_lib.o: ../include/openssl/tls1.h ../include/openssl/x509.h
t1_lib.o: ../include/openssl/x509_vfy.h ../include/openssl/x509v3.h
-t1_lib.o: packet_locl.h record/record.h ssl_locl.h t1_lib.c
-t1_meth.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-t1_meth.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-t1_meth.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-t1_meth.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-t1_meth.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-t1_meth.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-t1_meth.o: ../include/openssl/err.h ../include/openssl/evp.h
-t1_meth.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-t1_meth.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-t1_meth.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-t1_meth.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-t1_meth.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-t1_meth.o: ../include/openssl/pqueue.h ../include/openssl/rsa.h
-t1_meth.o: ../include/openssl/safestack.h ../include/openssl/sha.h
-t1_meth.o: ../include/openssl/srtp.h ../include/openssl/ssl.h
-t1_meth.o: ../include/openssl/ssl2.h ../include/openssl/ssl3.h
-t1_meth.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
-t1_meth.o: ../include/openssl/tls1.h ../include/openssl/x509.h
-t1_meth.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-t1_meth.o: ssl_locl.h t1_meth.c
+t1_lib.o: packet_locl.h record/record.h ssl_locl.h statem/statem.h t1_lib.c
t1_reneg.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
t1_reneg.o: ../include/openssl/bn.h ../include/openssl/buffer.h
t1_reneg.o: ../include/openssl/comp.h ../include/openssl/crypto.h
t1_reneg.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
t1_reneg.o: ../include/openssl/tls1.h ../include/openssl/x509.h
t1_reneg.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-t1_reneg.o: ssl_locl.h t1_reneg.c
-t1_srvr.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
-t1_srvr.o: ../include/openssl/bn.h ../include/openssl/buffer.h
-t1_srvr.o: ../include/openssl/comp.h ../include/openssl/crypto.h
-t1_srvr.o: ../include/openssl/dsa.h ../include/openssl/dtls1.h
-t1_srvr.o: ../include/openssl/e_os2.h ../include/openssl/ec.h
-t1_srvr.o: ../include/openssl/ecdh.h ../include/openssl/ecdsa.h
-t1_srvr.o: ../include/openssl/err.h ../include/openssl/evp.h
-t1_srvr.o: ../include/openssl/hmac.h ../include/openssl/lhash.h
-t1_srvr.o: ../include/openssl/obj_mac.h ../include/openssl/objects.h
-t1_srvr.o: ../include/openssl/opensslconf.h ../include/openssl/opensslv.h
-t1_srvr.o: ../include/openssl/ossl_typ.h ../include/openssl/pem.h
-t1_srvr.o: ../include/openssl/pem2.h ../include/openssl/pkcs7.h
-t1_srvr.o: ../include/openssl/pqueue.h ../include/openssl/rand.h
-t1_srvr.o: ../include/openssl/rsa.h ../include/openssl/safestack.h
-t1_srvr.o: ../include/openssl/sha.h ../include/openssl/srtp.h
-t1_srvr.o: ../include/openssl/ssl.h ../include/openssl/ssl2.h
-t1_srvr.o: ../include/openssl/ssl3.h ../include/openssl/stack.h
-t1_srvr.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
-t1_srvr.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
-t1_srvr.o: packet_locl.h record/record.h ssl_locl.h t1_srvr.c
+t1_reneg.o: ssl_locl.h statem/statem.h t1_reneg.c
t1_trce.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
t1_trce.o: ../include/openssl/bn.h ../include/openssl/buffer.h
t1_trce.o: ../include/openssl/comp.h ../include/openssl/crypto.h
t1_trce.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
t1_trce.o: ../include/openssl/tls1.h ../include/openssl/x509.h
t1_trce.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-t1_trce.o: ssl_locl.h t1_trce.c
+t1_trce.o: ssl_locl.h statem/statem.h t1_trce.c
tls_srp.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
tls_srp.o: ../include/openssl/bn.h ../include/openssl/buffer.h
tls_srp.o: ../include/openssl/comp.h ../include/openssl/crypto.h
tls_srp.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
tls_srp.o: ../include/openssl/tls1.h ../include/openssl/x509.h
tls_srp.o: ../include/openssl/x509_vfy.h packet_locl.h record/record.h
-tls_srp.o: ssl_locl.h tls_srp.c
+tls_srp.o: ssl_locl.h statem/statem.h tls_srp.c
+++ /dev/null
-/* ssl/d1_both.c */
-/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <limits.h>
-#include <string.h>
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-
-#define RSMBLY_BITMASK_SIZE(msg_len) (((msg_len) + 7) / 8)
-
-#define RSMBLY_BITMASK_MARK(bitmask, start, end) { \
- if ((end) - (start) <= 8) { \
- long ii; \
- for (ii = (start); ii < (end); ii++) bitmask[((ii) >> 3)] |= (1 << ((ii) & 7)); \
- } else { \
- long ii; \
- bitmask[((start) >> 3)] |= bitmask_start_values[((start) & 7)]; \
- for (ii = (((start) >> 3) + 1); ii < ((((end) - 1)) >> 3); ii++) bitmask[ii] = 0xff; \
- bitmask[(((end) - 1) >> 3)] |= bitmask_end_values[((end) & 7)]; \
- } }
-
-#define RSMBLY_BITMASK_IS_COMPLETE(bitmask, msg_len, is_complete) { \
- long ii; \
- OPENSSL_assert((msg_len) > 0); \
- is_complete = 1; \
- if (bitmask[(((msg_len) - 1) >> 3)] != bitmask_end_values[((msg_len) & 7)]) is_complete = 0; \
- if (is_complete) for (ii = (((msg_len) - 1) >> 3) - 1; ii >= 0 ; ii--) \
- if (bitmask[ii] != 0xff) { is_complete = 0; break; } }
-
-static unsigned char bitmask_start_values[] =
- { 0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80 };
-static unsigned char bitmask_end_values[] =
- { 0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f };
-
-/* XDTLS: figure out the right values */
-static const unsigned int g_probable_mtu[] = { 1500, 512, 256 };
-
-static void dtls1_fix_message_header(SSL *s, unsigned long frag_off,
- unsigned long frag_len);
-static unsigned char *dtls1_write_message_header(SSL *s, unsigned char *p);
-static void dtls1_set_message_header_int(SSL *s, unsigned char mt,
- unsigned long len,
- unsigned short seq_num,
- unsigned long frag_off,
- unsigned long frag_len);
-static int dtls_get_reassembled_message(SSL *s, long *len);
-
-static hm_fragment *dtls1_hm_fragment_new(unsigned long frag_len,
- int reassembly)
-{
- hm_fragment *frag = NULL;
- unsigned char *buf = NULL;
- unsigned char *bitmask = NULL;
-
- frag = OPENSSL_malloc(sizeof(*frag));
- if (frag == NULL)
- return NULL;
-
- if (frag_len) {
- buf = OPENSSL_malloc(frag_len);
- if (buf == NULL) {
- OPENSSL_free(frag);
- return NULL;
- }
- }
-
- /* zero length fragment gets zero frag->fragment */
- frag->fragment = buf;
-
- /* Initialize reassembly bitmask if necessary */
- if (reassembly) {
- bitmask = OPENSSL_zalloc(RSMBLY_BITMASK_SIZE(frag_len));
- if (bitmask == NULL) {
- OPENSSL_free(buf);
- OPENSSL_free(frag);
- return NULL;
- }
- }
-
- frag->reassembly = bitmask;
-
- return frag;
-}
-
-void dtls1_hm_fragment_free(hm_fragment *frag)
-{
- if (!frag)
- return;
- if (frag->msg_header.is_ccs) {
- EVP_CIPHER_CTX_free(frag->msg_header.
- saved_retransmit_state.enc_write_ctx);
- EVP_MD_CTX_destroy(frag->msg_header.
- saved_retransmit_state.write_hash);
- }
- OPENSSL_free(frag->fragment);
- OPENSSL_free(frag->reassembly);
- OPENSSL_free(frag);
-}
-
-static int dtls1_query_mtu(SSL *s)
-{
- if (s->d1->link_mtu) {
- s->d1->mtu =
- s->d1->link_mtu - BIO_dgram_get_mtu_overhead(SSL_get_wbio(s));
- s->d1->link_mtu = 0;
- }
-
- /* AHA! Figure out the MTU, and stick to the right size */
- if (s->d1->mtu < dtls1_min_mtu(s)) {
- if (!(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) {
- s->d1->mtu =
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
-
- /*
- * I've seen the kernel return bogus numbers when it doesn't know
- * (initial write), so just make sure we have a reasonable number
- */
- if (s->d1->mtu < dtls1_min_mtu(s)) {
- /* Set to min mtu */
- s->d1->mtu = dtls1_min_mtu(s);
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SET_MTU,
- s->d1->mtu, NULL);
- }
- } else
- return 0;
- }
- return 1;
-}
-
-/*
- * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
- * SSL3_RT_CHANGE_CIPHER_SPEC)
- */
-int dtls1_do_write(SSL *s, int type)
-{
- int ret;
- unsigned int curr_mtu;
- int retry = 1;
- unsigned int len, frag_off, mac_size, blocksize, used_len;
-
- if (!dtls1_query_mtu(s))
- return -1;
-
- OPENSSL_assert(s->d1->mtu >= dtls1_min_mtu(s)); /* should have something
- * reasonable now */
-
- if (s->init_off == 0 && type == SSL3_RT_HANDSHAKE)
- OPENSSL_assert(s->init_num ==
- (int)s->d1->w_msg_hdr.msg_len +
- DTLS1_HM_HEADER_LENGTH);
-
- if (s->write_hash) {
- if (s->enc_write_ctx
- && ((EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_GCM_MODE) ||
- (EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CCM_MODE)))
- mac_size = 0;
- else
- mac_size = EVP_MD_CTX_size(s->write_hash);
- } else
- mac_size = 0;
-
- if (s->enc_write_ctx &&
- (EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CBC_MODE))
- blocksize = 2 * EVP_CIPHER_block_size(s->enc_write_ctx->cipher);
- else
- blocksize = 0;
-
- frag_off = 0;
- /* s->init_num shouldn't ever be < 0...but just in case */
- while (s->init_num > 0) {
- used_len = BIO_wpending(SSL_get_wbio(s)) + DTLS1_RT_HEADER_LENGTH
- + mac_size + blocksize;
- if (s->d1->mtu > used_len)
- curr_mtu = s->d1->mtu - used_len;
- else
- curr_mtu = 0;
-
- if (curr_mtu <= DTLS1_HM_HEADER_LENGTH) {
- /*
- * grr.. we could get an error if MTU picked was wrong
- */
- ret = BIO_flush(SSL_get_wbio(s));
- if (ret <= 0)
- return ret;
- used_len = DTLS1_RT_HEADER_LENGTH + mac_size + blocksize;
- if (s->d1->mtu > used_len + DTLS1_HM_HEADER_LENGTH) {
- curr_mtu = s->d1->mtu - used_len;
- } else {
- /* Shouldn't happen */
- return -1;
- }
- }
-
- /*
- * We just checked that s->init_num > 0 so this cast should be safe
- */
- if (((unsigned int)s->init_num) > curr_mtu)
- len = curr_mtu;
- else
- len = s->init_num;
-
- /* Shouldn't ever happen */
- if (len > INT_MAX)
- len = INT_MAX;
-
- /*
- * XDTLS: this function is too long. split out the CCS part
- */
- if (type == SSL3_RT_HANDSHAKE) {
- if (s->init_off != 0) {
- OPENSSL_assert(s->init_off > DTLS1_HM_HEADER_LENGTH);
- s->init_off -= DTLS1_HM_HEADER_LENGTH;
- s->init_num += DTLS1_HM_HEADER_LENGTH;
-
- /*
- * We just checked that s->init_num > 0 so this cast should
- * be safe
- */
- if (((unsigned int)s->init_num) > curr_mtu)
- len = curr_mtu;
- else
- len = s->init_num;
- }
-
- /* Shouldn't ever happen */
- if (len > INT_MAX)
- len = INT_MAX;
-
- if (len < DTLS1_HM_HEADER_LENGTH) {
- /*
- * len is so small that we really can't do anything sensible
- * so fail
- */
- return -1;
- }
- dtls1_fix_message_header(s, frag_off,
- len - DTLS1_HM_HEADER_LENGTH);
-
- dtls1_write_message_header(s,
- (unsigned char *)&s->init_buf->
- data[s->init_off]);
- }
-
- ret = dtls1_write_bytes(s, type, &s->init_buf->data[s->init_off],
- len);
- if (ret < 0) {
- /*
- * might need to update MTU here, but we don't know which
- * previous packet caused the failure -- so can't really
- * retransmit anything. continue as if everything is fine and
- * wait for an alert to handle the retransmit
- */
- if (retry && BIO_ctrl(SSL_get_wbio(s),
- BIO_CTRL_DGRAM_MTU_EXCEEDED, 0, NULL) > 0) {
- if (!(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) {
- if (!dtls1_query_mtu(s))
- return -1;
- /* Have one more go */
- retry = 0;
- } else
- return -1;
- } else {
- return (-1);
- }
- } else {
-
- /*
- * bad if this assert fails, only part of the handshake message
- * got sent. but why would this happen?
- */
- OPENSSL_assert(len == (unsigned int)ret);
-
- if (type == SSL3_RT_HANDSHAKE && !s->d1->retransmitting) {
- /*
- * should not be done for 'Hello Request's, but in that case
- * we'll ignore the result anyway
- */
- unsigned char *p =
- (unsigned char *)&s->init_buf->data[s->init_off];
- const struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
- int xlen;
-
- if (frag_off == 0 && s->version != DTLS1_BAD_VER) {
- /*
- * reconstruct message header is if it is being sent in
- * single fragment
- */
- *p++ = msg_hdr->type;
- l2n3(msg_hdr->msg_len, p);
- s2n(msg_hdr->seq, p);
- l2n3(0, p);
- l2n3(msg_hdr->msg_len, p);
- p -= DTLS1_HM_HEADER_LENGTH;
- xlen = ret;
- } else {
- p += DTLS1_HM_HEADER_LENGTH;
- xlen = ret - DTLS1_HM_HEADER_LENGTH;
- }
-
- ssl3_finish_mac(s, p, xlen);
- }
-
- if (ret == s->init_num) {
- if (s->msg_callback)
- s->msg_callback(1, s->version, type, s->init_buf->data,
- (size_t)(s->init_off + s->init_num), s,
- s->msg_callback_arg);
-
- s->init_off = 0; /* done writing this message */
- s->init_num = 0;
-
- return (1);
- }
- s->init_off += ret;
- s->init_num -= ret;
- frag_off += (ret -= DTLS1_HM_HEADER_LENGTH);
- }
- }
- return (0);
-}
-
-int dtls_get_message(SSL *s, int *mt, unsigned long *len)
-{
- struct hm_header_st *msg_hdr;
- unsigned char *p;
- unsigned long msg_len;
- int ok;
- long tmplen;
-
- msg_hdr = &s->d1->r_msg_hdr;
- memset(msg_hdr, 0, sizeof(*msg_hdr));
-
- again:
- ok = dtls_get_reassembled_message(s, &tmplen);
- if (tmplen == DTLS1_HM_BAD_FRAGMENT
- || tmplen == DTLS1_HM_FRAGMENT_RETRY) {
- /* bad fragment received */
- goto again;
- } else if (tmplen <= 0 && !ok) {
- return 0;
- }
-
- *mt = s->s3->tmp.message_type;
-
- p = (unsigned char *)s->init_buf->data;
-
- if (*mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- if (s->msg_callback) {
- s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
- p, 1, s, s->msg_callback_arg);
- }
- /*
- * This isn't a real handshake message so skip the processing below.
- */
- *len = (unsigned long)tmplen;
- return 1;
- }
-
- msg_len = msg_hdr->msg_len;
-
- /* reconstruct message header */
- *(p++) = msg_hdr->type;
- l2n3(msg_len, p);
- s2n(msg_hdr->seq, p);
- l2n3(0, p);
- l2n3(msg_len, p);
- if (s->version != DTLS1_BAD_VER) {
- p -= DTLS1_HM_HEADER_LENGTH;
- msg_len += DTLS1_HM_HEADER_LENGTH;
- }
-
- ssl3_finish_mac(s, p, msg_len);
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
- p, msg_len, s, s->msg_callback_arg);
-
- memset(msg_hdr, 0, sizeof(*msg_hdr));
-
- s->d1->handshake_read_seq++;
-
-
- s->init_msg = s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
- *len = s->init_num;
-
- return 1;
-}
-
-static int dtls1_preprocess_fragment(SSL *s, struct hm_header_st *msg_hdr)
-{
- size_t frag_off, frag_len, msg_len;
-
- msg_len = msg_hdr->msg_len;
- frag_off = msg_hdr->frag_off;
- frag_len = msg_hdr->frag_len;
-
- /* sanity checking */
- if ((frag_off + frag_len) > msg_len) {
- SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE);
- return SSL_AD_ILLEGAL_PARAMETER;
- }
-
- if (s->d1->r_msg_hdr.frag_off == 0) { /* first fragment */
- /*
- * msg_len is limited to 2^24, but is effectively checked against max
- * above
- */
- if (!BUF_MEM_grow_clean
- (s->init_buf, msg_len + DTLS1_HM_HEADER_LENGTH)) {
- SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, ERR_R_BUF_LIB);
- return SSL_AD_INTERNAL_ERROR;
- }
-
- s->s3->tmp.message_size = msg_len;
- s->d1->r_msg_hdr.msg_len = msg_len;
- s->s3->tmp.message_type = msg_hdr->type;
- s->d1->r_msg_hdr.type = msg_hdr->type;
- s->d1->r_msg_hdr.seq = msg_hdr->seq;
- } else if (msg_len != s->d1->r_msg_hdr.msg_len) {
- /*
- * They must be playing with us! BTW, failure to enforce upper limit
- * would open possibility for buffer overrun.
- */
- SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE);
- return SSL_AD_ILLEGAL_PARAMETER;
- }
-
- return 0; /* no error */
-}
-
-static int dtls1_retrieve_buffered_fragment(SSL *s, int *ok)
-{
- /*-
- * (0) check whether the desired fragment is available
- * if so:
- * (1) copy over the fragment to s->init_buf->data[]
- * (2) update s->init_num
- */
- pitem *item;
- hm_fragment *frag;
- int al;
-
- *ok = 0;
- item = pqueue_peek(s->d1->buffered_messages);
- if (item == NULL)
- return 0;
-
- frag = (hm_fragment *)item->data;
-
- /* Don't return if reassembly still in progress */
- if (frag->reassembly != NULL)
- return 0;
-
- if (s->d1->handshake_read_seq == frag->msg_header.seq) {
- unsigned long frag_len = frag->msg_header.frag_len;
- pqueue_pop(s->d1->buffered_messages);
-
- al = dtls1_preprocess_fragment(s, &frag->msg_header);
-
- if (al == 0) { /* no alert */
- unsigned char *p =
- (unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
- memcpy(&p[frag->msg_header.frag_off], frag->fragment,
- frag->msg_header.frag_len);
- }
-
- dtls1_hm_fragment_free(frag);
- pitem_free(item);
-
- if (al == 0) {
- *ok = 1;
- return frag_len;
- }
-
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- s->init_num = 0;
- *ok = 0;
- return -1;
- } else
- return 0;
-}
-
-/*
- * dtls1_max_handshake_message_len returns the maximum number of bytes
- * permitted in a DTLS handshake message for |s|. The minimum is 16KB, but
- * may be greater if the maximum certificate list size requires it.
- */
-static unsigned long dtls1_max_handshake_message_len(const SSL *s)
-{
- unsigned long max_len =
- DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH;
- if (max_len < (unsigned long)s->max_cert_list)
- return s->max_cert_list;
- return max_len;
-}
-
-static int
-dtls1_reassemble_fragment(SSL *s, const struct hm_header_st *msg_hdr, int *ok)
-{
- hm_fragment *frag = NULL;
- pitem *item = NULL;
- int i = -1, is_complete;
- unsigned char seq64be[8];
- unsigned long frag_len = msg_hdr->frag_len;
-
- if ((msg_hdr->frag_off + frag_len) > msg_hdr->msg_len ||
- msg_hdr->msg_len > dtls1_max_handshake_message_len(s))
- goto err;
-
- if (frag_len == 0)
- return DTLS1_HM_FRAGMENT_RETRY;
-
- /* Try to find item in queue */
- memset(seq64be, 0, sizeof(seq64be));
- seq64be[6] = (unsigned char)(msg_hdr->seq >> 8);
- seq64be[7] = (unsigned char)msg_hdr->seq;
- item = pqueue_find(s->d1->buffered_messages, seq64be);
-
- if (item == NULL) {
- frag = dtls1_hm_fragment_new(msg_hdr->msg_len, 1);
- if (frag == NULL)
- goto err;
- memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
- frag->msg_header.frag_len = frag->msg_header.msg_len;
- frag->msg_header.frag_off = 0;
- } else {
- frag = (hm_fragment *)item->data;
- if (frag->msg_header.msg_len != msg_hdr->msg_len) {
- item = NULL;
- frag = NULL;
- goto err;
- }
- }
-
- /*
- * If message is already reassembled, this must be a retransmit and can
- * be dropped. In this case item != NULL and so frag does not need to be
- * freed.
- */
- if (frag->reassembly == NULL) {
- unsigned char devnull[256];
-
- while (frag_len) {
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- devnull,
- frag_len >
- sizeof(devnull) ? sizeof(devnull) :
- frag_len, 0);
- if (i <= 0)
- goto err;
- frag_len -= i;
- }
- return DTLS1_HM_FRAGMENT_RETRY;
- }
-
- /* read the body of the fragment (header has already been read */
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- frag->fragment + msg_hdr->frag_off,
- frag_len, 0);
- if ((unsigned long)i != frag_len)
- i = -1;
- if (i <= 0)
- goto err;
-
- RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off,
- (long)(msg_hdr->frag_off + frag_len));
-
- RSMBLY_BITMASK_IS_COMPLETE(frag->reassembly, (long)msg_hdr->msg_len,
- is_complete);
-
- if (is_complete) {
- OPENSSL_free(frag->reassembly);
- frag->reassembly = NULL;
- }
-
- if (item == NULL) {
- item = pitem_new(seq64be, frag);
- if (item == NULL) {
- i = -1;
- goto err;
- }
-
- item = pqueue_insert(s->d1->buffered_messages, item);
- /*
- * pqueue_insert fails iff a duplicate item is inserted. However,
- * |item| cannot be a duplicate. If it were, |pqueue_find|, above,
- * would have returned it and control would never have reached this
- * branch.
- */
- OPENSSL_assert(item != NULL);
- }
-
- return DTLS1_HM_FRAGMENT_RETRY;
-
- err:
- if (item == NULL)
- dtls1_hm_fragment_free(frag);
- *ok = 0;
- return i;
-}
-
-static int
-dtls1_process_out_of_seq_message(SSL *s, const struct hm_header_st *msg_hdr,
- int *ok)
-{
- int i = -1;
- hm_fragment *frag = NULL;
- pitem *item = NULL;
- unsigned char seq64be[8];
- unsigned long frag_len = msg_hdr->frag_len;
-
- if ((msg_hdr->frag_off + frag_len) > msg_hdr->msg_len)
- goto err;
-
- /* Try to find item in queue, to prevent duplicate entries */
- memset(seq64be, 0, sizeof(seq64be));
- seq64be[6] = (unsigned char)(msg_hdr->seq >> 8);
- seq64be[7] = (unsigned char)msg_hdr->seq;
- item = pqueue_find(s->d1->buffered_messages, seq64be);
-
- /*
- * If we already have an entry and this one is a fragment, don't discard
- * it and rather try to reassemble it.
- */
- if (item != NULL && frag_len != msg_hdr->msg_len)
- item = NULL;
-
- /*
- * Discard the message if sequence number was already there, is too far
- * in the future, already in the queue or if we received a FINISHED
- * before the SERVER_HELLO, which then must be a stale retransmit.
- */
- if (msg_hdr->seq <= s->d1->handshake_read_seq ||
- msg_hdr->seq > s->d1->handshake_read_seq + 10 || item != NULL ||
- (s->d1->handshake_read_seq == 0 && msg_hdr->type == SSL3_MT_FINISHED))
- {
- unsigned char devnull[256];
-
- while (frag_len) {
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- devnull,
- frag_len >
- sizeof(devnull) ? sizeof(devnull) :
- frag_len, 0);
- if (i <= 0)
- goto err;
- frag_len -= i;
- }
- } else {
- if (frag_len != msg_hdr->msg_len)
- return dtls1_reassemble_fragment(s, msg_hdr, ok);
-
- if (frag_len > dtls1_max_handshake_message_len(s))
- goto err;
-
- frag = dtls1_hm_fragment_new(frag_len, 0);
- if (frag == NULL)
- goto err;
-
- memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
-
- if (frag_len) {
- /*
- * read the body of the fragment (header has already been read
- */
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- frag->fragment, frag_len, 0);
- if ((unsigned long)i != frag_len)
- i = -1;
- if (i <= 0)
- goto err;
- }
-
- item = pitem_new(seq64be, frag);
- if (item == NULL)
- goto err;
-
- item = pqueue_insert(s->d1->buffered_messages, item);
- /*
- * pqueue_insert fails iff a duplicate item is inserted. However,
- * |item| cannot be a duplicate. If it were, |pqueue_find|, above,
- * would have returned it. Then, either |frag_len| !=
- * |msg_hdr->msg_len| in which case |item| is set to NULL and it will
- * have been processed with |dtls1_reassemble_fragment|, above, or
- * the record will have been discarded.
- */
- OPENSSL_assert(item != NULL);
- }
-
- return DTLS1_HM_FRAGMENT_RETRY;
-
- err:
- if (item == NULL)
- dtls1_hm_fragment_free(frag);
- *ok = 0;
- return i;
-}
-
-static int dtls_get_reassembled_message(SSL *s, long *len)
-{
- unsigned char wire[DTLS1_HM_HEADER_LENGTH];
- unsigned long mlen, frag_off, frag_len;
- int i, al, recvd_type;
- struct hm_header_st msg_hdr;
- int ok;
-
- redo:
- /* see if we have the required fragment already */
- if ((frag_len = dtls1_retrieve_buffered_fragment(s, &ok)) || ok) {
- if (ok)
- s->init_num = frag_len;
- *len = frag_len;
- return ok;
- }
-
- /* read handshake message header */
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type, wire,
- DTLS1_HM_HEADER_LENGTH, 0);
- if (i <= 0) { /* nbio, or an error */
- s->rwstate = SSL_READING;
- *len = i;
- return 0;
- }
- if(recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) {
- if (wire[0] != SSL3_MT_CCS) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE,
- SSL_R_BAD_CHANGE_CIPHER_SPEC);
- goto f_err;
- }
-
- memcpy(s->init_buf->data, wire, i);
- s->init_num = i - 1;
- s->init_msg = s->init_buf->data + 1;
- s->s3->tmp.message_type = SSL3_MT_CHANGE_CIPHER_SPEC;
- s->s3->tmp.message_size = i - 1;
- *len = i - 1;
- return 1;
- }
-
- /* Handshake fails if message header is incomplete */
- if (i != DTLS1_HM_HEADER_LENGTH) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
-
- /* parse the message fragment header */
- dtls1_get_message_header(wire, &msg_hdr);
-
- mlen = msg_hdr.msg_len;
- frag_off = msg_hdr.frag_off;
- frag_len = msg_hdr.frag_len;
-
- /*
- * We must have at least frag_len bytes left in the record to be read.
- * Fragments must not span records.
- */
- if (frag_len > RECORD_LAYER_get_rrec_length(&s->rlayer)) {
- al = SSL3_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH);
- goto f_err;
- }
-
- /*
- * if this is a future (or stale) message it gets buffered
- * (or dropped)--no further processing at this time
- * While listening, we accept seq 1 (ClientHello with cookie)
- * although we're still expecting seq 0 (ClientHello)
- */
- if (msg_hdr.seq != s->d1->handshake_read_seq) {
- *len = dtls1_process_out_of_seq_message(s, &msg_hdr, &ok);
- return ok;
- }
-
- if (frag_len && frag_len < mlen) {
- *len = dtls1_reassemble_fragment(s, &msg_hdr, &ok);
- return ok;
- }
-
- if (!s->server && s->d1->r_msg_hdr.frag_off == 0 &&
- wire[0] == SSL3_MT_HELLO_REQUEST) {
- /*
- * The server may always send 'Hello Request' messages -- we are
- * doing a handshake anyway now, so ignore them if their format is
- * correct. Does not count for 'Finished' MAC.
- */
- if (wire[1] == 0 && wire[2] == 0 && wire[3] == 0) {
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
- wire, DTLS1_HM_HEADER_LENGTH, s,
- s->msg_callback_arg);
-
- s->init_num = 0;
- goto redo;
- } else { /* Incorrectly formated Hello request */
-
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE,
- SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
- }
-
- if ((al = dtls1_preprocess_fragment(s, &msg_hdr)))
- goto f_err;
-
- if (frag_len > 0) {
- unsigned char *p =
- (unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
-
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- &p[frag_off], frag_len, 0);
-
- /*
- * This shouldn't ever fail due to NBIO because we already checked
- * that we have enough data in the record
- */
- if (i <= 0) {
- s->rwstate = SSL_READING;
- *len = i;
- return 0;
- }
- } else
- i = 0;
-
- /*
- * XDTLS: an incorrectly formatted fragment should cause the handshake
- * to fail
- */
- if (i != (int)frag_len) {
- al = SSL3_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL3_AD_ILLEGAL_PARAMETER);
- goto f_err;
- }
-
- /*
- * Note that s->init_num is *not* used as current offset in
- * s->init_buf->data, but as a counter summing up fragments' lengths: as
- * soon as they sum up to handshake packet length, we assume we have got
- * all the fragments.
- */
- *len = s->init_num = frag_len;
- return 1;
-
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- s->init_num = 0;
- *len = -1;
- return 0;
-}
-
-/*-
- * for these 2 messages, we need to
- * ssl->enc_read_ctx re-init
- * ssl->rlayer.read_sequence zero
- * ssl->s3->read_mac_secret re-init
- * ssl->session->read_sym_enc assign
- * ssl->session->read_compression assign
- * ssl->session->read_hash assign
- */
-int dtls_construct_change_cipher_spec(SSL *s)
-{
- unsigned char *p;
-
- p = (unsigned char *)s->init_buf->data;
- *p++ = SSL3_MT_CCS;
- s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
- s->init_num = DTLS1_CCS_HEADER_LENGTH;
-
- if (s->version == DTLS1_BAD_VER) {
- s->d1->next_handshake_write_seq++;
- s2n(s->d1->handshake_write_seq, p);
- s->init_num += 2;
- }
-
- s->init_off = 0;
-
- dtls1_set_message_header_int(s, SSL3_MT_CCS, 0,
- s->d1->handshake_write_seq, 0, 0);
-
- /* buffer the message to handle re-xmits */
- if (!dtls1_buffer_message(s, 1)) {
- SSLerr(SSL_F_DTLS_CONSTRUCT_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- return 1;
-}
-
-#ifndef OPENSSL_NO_SCTP
-enum WORK_STATE dtls_wait_for_dry(SSL *s)
-{
- int ret;
-
- /* read app data until dry event */
- ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
- if (ret < 0)
- return WORK_ERROR;
-
- if (ret == 0) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- return WORK_MORE_A;
- }
- return WORK_FINISHED_CONTINUE;
-}
-#endif
-
-int dtls1_read_failed(SSL *s, int code)
-{
- if (code > 0) {
- fprintf(stderr, "invalid state reached %s:%d", __FILE__, __LINE__);
- return 1;
- }
-
- if (!dtls1_is_timer_expired(s)) {
- /*
- * not a timeout, none of our business, let higher layers handle
- * this. in fact it's probably an error
- */
- return code;
- }
-#ifndef OPENSSL_NO_HEARTBEATS
- /* done, no need to send a retransmit */
- if (!SSL_in_init(s) && !s->tlsext_hb_pending)
-#else
- /* done, no need to send a retransmit */
- if (!SSL_in_init(s))
-#endif
- {
- BIO_set_flags(SSL_get_rbio(s), BIO_FLAGS_READ);
- return code;
- }
-
- return dtls1_handle_timeout(s);
-}
-
-int dtls1_get_queue_priority(unsigned short seq, int is_ccs)
-{
- /*
- * The index of the retransmission queue actually is the message sequence
- * number, since the queue only contains messages of a single handshake.
- * However, the ChangeCipherSpec has no message sequence number and so
- * using only the sequence will result in the CCS and Finished having the
- * same index. To prevent this, the sequence number is multiplied by 2.
- * In case of a CCS 1 is subtracted. This does not only differ CSS and
- * Finished, it also maintains the order of the index (important for
- * priority queues) and fits in the unsigned short variable.
- */
- return seq * 2 - is_ccs;
-}
-
-int dtls1_retransmit_buffered_messages(SSL *s)
-{
- pqueue sent = s->d1->sent_messages;
- piterator iter;
- pitem *item;
- hm_fragment *frag;
- int found = 0;
-
- iter = pqueue_iterator(sent);
-
- for (item = pqueue_next(&iter); item != NULL; item = pqueue_next(&iter)) {
- frag = (hm_fragment *)item->data;
- if (dtls1_retransmit_message(s, (unsigned short)
- dtls1_get_queue_priority
- (frag->msg_header.seq,
- frag->msg_header.is_ccs), 0,
- &found) <= 0 && found) {
- fprintf(stderr, "dtls1_retransmit_message() failed\n");
- return -1;
- }
- }
-
- return 1;
-}
-
-int dtls1_buffer_message(SSL *s, int is_ccs)
-{
- pitem *item;
- hm_fragment *frag;
- unsigned char seq64be[8];
-
- /*
- * this function is called immediately after a message has been
- * serialized
- */
- OPENSSL_assert(s->init_off == 0);
-
- frag = dtls1_hm_fragment_new(s->init_num, 0);
- if (!frag)
- return 0;
-
- memcpy(frag->fragment, s->init_buf->data, s->init_num);
-
- if (is_ccs) {
- /* For DTLS1_BAD_VER the header length is non-standard */
- OPENSSL_assert(s->d1->w_msg_hdr.msg_len +
- ((s->version==DTLS1_BAD_VER)?3:DTLS1_CCS_HEADER_LENGTH)
- == (unsigned int)s->init_num);
- } else {
- OPENSSL_assert(s->d1->w_msg_hdr.msg_len +
- DTLS1_HM_HEADER_LENGTH == (unsigned int)s->init_num);
- }
-
- frag->msg_header.msg_len = s->d1->w_msg_hdr.msg_len;
- frag->msg_header.seq = s->d1->w_msg_hdr.seq;
- frag->msg_header.type = s->d1->w_msg_hdr.type;
- frag->msg_header.frag_off = 0;
- frag->msg_header.frag_len = s->d1->w_msg_hdr.msg_len;
- frag->msg_header.is_ccs = is_ccs;
-
- /* save current state */
- frag->msg_header.saved_retransmit_state.enc_write_ctx = s->enc_write_ctx;
- frag->msg_header.saved_retransmit_state.write_hash = s->write_hash;
- frag->msg_header.saved_retransmit_state.compress = s->compress;
- frag->msg_header.saved_retransmit_state.session = s->session;
- frag->msg_header.saved_retransmit_state.epoch =
- DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer);
-
- memset(seq64be, 0, sizeof(seq64be));
- seq64be[6] =
- (unsigned
- char)(dtls1_get_queue_priority(frag->msg_header.seq,
- frag->msg_header.is_ccs) >> 8);
- seq64be[7] =
- (unsigned
- char)(dtls1_get_queue_priority(frag->msg_header.seq,
- frag->msg_header.is_ccs));
-
- item = pitem_new(seq64be, frag);
- if (item == NULL) {
- dtls1_hm_fragment_free(frag);
- return 0;
- }
-
- pqueue_insert(s->d1->sent_messages, item);
- return 1;
-}
-
-int
-dtls1_retransmit_message(SSL *s, unsigned short seq, unsigned long frag_off,
- int *found)
-{
- int ret;
- /* XDTLS: for now assuming that read/writes are blocking */
- pitem *item;
- hm_fragment *frag;
- unsigned long header_length;
- unsigned char seq64be[8];
- struct dtls1_retransmit_state saved_state;
-
- /*-
- OPENSSL_assert(s->init_num == 0);
- OPENSSL_assert(s->init_off == 0);
- */
-
- /* XDTLS: the requested message ought to be found, otherwise error */
- memset(seq64be, 0, sizeof(seq64be));
- seq64be[6] = (unsigned char)(seq >> 8);
- seq64be[7] = (unsigned char)seq;
-
- item = pqueue_find(s->d1->sent_messages, seq64be);
- if (item == NULL) {
- fprintf(stderr, "retransmit: message %d non-existant\n", seq);
- *found = 0;
- return 0;
- }
-
- *found = 1;
- frag = (hm_fragment *)item->data;
-
- if (frag->msg_header.is_ccs)
- header_length = DTLS1_CCS_HEADER_LENGTH;
- else
- header_length = DTLS1_HM_HEADER_LENGTH;
-
- memcpy(s->init_buf->data, frag->fragment,
- frag->msg_header.msg_len + header_length);
- s->init_num = frag->msg_header.msg_len + header_length;
-
- dtls1_set_message_header_int(s, frag->msg_header.type,
- frag->msg_header.msg_len,
- frag->msg_header.seq, 0,
- frag->msg_header.frag_len);
-
- /* save current state */
- saved_state.enc_write_ctx = s->enc_write_ctx;
- saved_state.write_hash = s->write_hash;
- saved_state.compress = s->compress;
- saved_state.session = s->session;
- saved_state.epoch = DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer);
-
- s->d1->retransmitting = 1;
-
- /* restore state in which the message was originally sent */
- s->enc_write_ctx = frag->msg_header.saved_retransmit_state.enc_write_ctx;
- s->write_hash = frag->msg_header.saved_retransmit_state.write_hash;
- s->compress = frag->msg_header.saved_retransmit_state.compress;
- s->session = frag->msg_header.saved_retransmit_state.session;
- DTLS_RECORD_LAYER_set_saved_w_epoch(&s->rlayer,
- frag->msg_header.saved_retransmit_state.epoch);
-
- ret = dtls1_do_write(s, frag->msg_header.is_ccs ?
- SSL3_RT_CHANGE_CIPHER_SPEC : SSL3_RT_HANDSHAKE);
-
- /* restore current state */
- s->enc_write_ctx = saved_state.enc_write_ctx;
- s->write_hash = saved_state.write_hash;
- s->compress = saved_state.compress;
- s->session = saved_state.session;
- DTLS_RECORD_LAYER_set_saved_w_epoch(&s->rlayer, saved_state.epoch);
-
- s->d1->retransmitting = 0;
-
- (void)BIO_flush(SSL_get_wbio(s));
- return ret;
-}
-
-/* call this function when the buffered messages are no longer needed */
-void dtls1_clear_record_buffer(SSL *s)
-{
- pitem *item;
-
- for (item = pqueue_pop(s->d1->sent_messages);
- item != NULL; item = pqueue_pop(s->d1->sent_messages)) {
- dtls1_hm_fragment_free((hm_fragment *)item->data);
- pitem_free(item);
- }
-}
-
-void dtls1_set_message_header(SSL *s, unsigned char *p,
- unsigned char mt, unsigned long len,
- unsigned long frag_off,
- unsigned long frag_len)
-{
- if (frag_off == 0) {
- s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
- s->d1->next_handshake_write_seq++;
- }
-
- dtls1_set_message_header_int(s, mt, len, s->d1->handshake_write_seq,
- frag_off, frag_len);
-}
-
-/* don't actually do the writing, wait till the MTU has been retrieved */
-static void
-dtls1_set_message_header_int(SSL *s, unsigned char mt,
- unsigned long len, unsigned short seq_num,
- unsigned long frag_off, unsigned long frag_len)
-{
- struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
- msg_hdr->type = mt;
- msg_hdr->msg_len = len;
- msg_hdr->seq = seq_num;
- msg_hdr->frag_off = frag_off;
- msg_hdr->frag_len = frag_len;
-}
-
-static void
-dtls1_fix_message_header(SSL *s, unsigned long frag_off,
- unsigned long frag_len)
-{
- struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
- msg_hdr->frag_off = frag_off;
- msg_hdr->frag_len = frag_len;
-}
-
-static unsigned char *dtls1_write_message_header(SSL *s, unsigned char *p)
-{
- struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
- *p++ = msg_hdr->type;
- l2n3(msg_hdr->msg_len, p);
-
- s2n(msg_hdr->seq, p);
- l2n3(msg_hdr->frag_off, p);
- l2n3(msg_hdr->frag_len, p);
-
- return p;
-}
-
-unsigned int dtls1_link_min_mtu(void)
-{
- return (g_probable_mtu[(sizeof(g_probable_mtu) /
- sizeof(g_probable_mtu[0])) - 1]);
-}
-
-unsigned int dtls1_min_mtu(SSL *s)
-{
- return dtls1_link_min_mtu() - BIO_dgram_get_mtu_overhead(SSL_get_wbio(s));
-}
-
-void
-dtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr)
-{
- memset(msg_hdr, 0, sizeof(*msg_hdr));
- msg_hdr->type = *(data++);
- n2l3(data, msg_hdr->msg_len);
-
- n2s(data, msg_hdr->seq);
- n2l3(data, msg_hdr->frag_off);
- n2l3(data, msg_hdr->frag_len);
-}
-
-int dtls1_shutdown(SSL *s)
-{
- int ret;
-#ifndef OPENSSL_NO_SCTP
- BIO *wbio;
-
- wbio = SSL_get_wbio(s);
- if (wbio != NULL && BIO_dgram_is_sctp(wbio) &&
- !(s->shutdown & SSL_SENT_SHUTDOWN)) {
- ret = BIO_dgram_sctp_wait_for_dry(wbio);
- if (ret < 0)
- return -1;
-
- if (ret == 0)
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 1,
- NULL);
- }
-#endif
- ret = ssl3_shutdown(s);
-#ifndef OPENSSL_NO_SCTP
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 0, NULL);
-#endif
- return ret;
-}
-
-#ifndef OPENSSL_NO_HEARTBEATS
-int dtls1_process_heartbeat(SSL *s, unsigned char *p, unsigned int length)
-{
- unsigned char *pl;
- unsigned short hbtype;
- unsigned int payload;
- unsigned int padding = 16; /* Use minimum padding */
-
- if (s->msg_callback)
- s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
- p, length, s, s->msg_callback_arg);
-
- /* Read type and payload length first */
- if (1 + 2 + 16 > length)
- return 0; /* silently discard */
- if (length > SSL3_RT_MAX_PLAIN_LENGTH)
- return 0; /* silently discard per RFC 6520 sec. 4 */
-
- hbtype = *p++;
- n2s(p, payload);
- if (1 + 2 + payload + 16 > length)
- return 0; /* silently discard per RFC 6520 sec. 4 */
- pl = p;
-
- if (hbtype == TLS1_HB_REQUEST) {
- unsigned char *buffer, *bp;
- unsigned int write_length = 1 /* heartbeat type */ +
- 2 /* heartbeat length */ +
- payload + padding;
- int r;
-
- if (write_length > SSL3_RT_MAX_PLAIN_LENGTH)
- return 0;
-
- /*
- * Allocate memory for the response, size is 1 byte message type,
- * plus 2 bytes payload length, plus payload, plus padding
- */
- buffer = OPENSSL_malloc(write_length);
- if (buffer == NULL)
- return -1;
- bp = buffer;
-
- /* Enter response type, length and copy payload */
- *bp++ = TLS1_HB_RESPONSE;
- s2n(payload, bp);
- memcpy(bp, pl, payload);
- bp += payload;
- /* Random padding */
- if (RAND_bytes(bp, padding) <= 0) {
- OPENSSL_free(buffer);
- return -1;
- }
-
- r = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, write_length);
-
- if (r >= 0 && s->msg_callback)
- s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
- buffer, write_length, s, s->msg_callback_arg);
-
- OPENSSL_free(buffer);
-
- if (r < 0)
- return r;
- } else if (hbtype == TLS1_HB_RESPONSE) {
- unsigned int seq;
-
- /*
- * We only send sequence numbers (2 bytes unsigned int), and 16
- * random bytes, so we just try to read the sequence number
- */
- n2s(pl, seq);
-
- if (payload == 18 && seq == s->tlsext_hb_seq) {
- dtls1_stop_timer(s);
- s->tlsext_hb_seq++;
- s->tlsext_hb_pending = 0;
- }
- }
-
- return 0;
-}
-
-int dtls1_heartbeat(SSL *s)
-{
- unsigned char *buf, *p;
- int ret = -1;
- unsigned int payload = 18; /* Sequence number + random bytes */
- unsigned int padding = 16; /* Use minimum padding */
-
- /* Only send if peer supports and accepts HB requests... */
- if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
- s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
- return -1;
- }
-
- /* ...and there is none in flight yet... */
- if (s->tlsext_hb_pending) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PENDING);
- return -1;
- }
-
- /* ...and no handshake in progress. */
- if (SSL_in_init(s) || s->in_handshake) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_UNEXPECTED_MESSAGE);
- return -1;
- }
-
- /*
- * Check if padding is too long, payload and padding must not exceed 2^14
- * - 3 = 16381 bytes in total.
- */
- OPENSSL_assert(payload + padding <= 16381);
-
- /*-
- * Create HeartBeat message, we just use a sequence number
- * as payload to distuingish different messages and add
- * some random stuff.
- * - Message Type, 1 byte
- * - Payload Length, 2 bytes (unsigned int)
- * - Payload, the sequence number (2 bytes uint)
- * - Payload, random bytes (16 bytes uint)
- * - Padding
- */
- buf = OPENSSL_malloc(1 + 2 + payload + padding);
- if (buf == NULL) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_MALLOC_FAILURE);
- return -1;
- }
- p = buf;
- /* Message Type */
- *p++ = TLS1_HB_REQUEST;
- /* Payload length (18 bytes here) */
- s2n(payload, p);
- /* Sequence number */
- s2n(s->tlsext_hb_seq, p);
- /* 16 random bytes */
- if (RAND_bytes(p, 16) <= 0) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- p += 16;
- /* Random padding */
- if (RAND_bytes(p, padding) <= 0) {
- SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- ret = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
- if (ret >= 0) {
- if (s->msg_callback)
- s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
- buf, 3 + payload + padding,
- s, s->msg_callback_arg);
-
- dtls1_start_timer(s);
- s->tlsext_hb_pending = 1;
- }
-
- err:
- OPENSSL_free(buf);
-
- return ret;
-}
-#endif
+++ /dev/null
-/* ssl/d1_clnt.c */
-/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/md5.h>
-#include <openssl/bn.h>
-#ifndef OPENSSL_NO_DH
-# include <openssl/dh.h>
-#endif
-
-static const SSL_METHOD *dtls1_get_client_method(int ver);
-
-static const SSL_METHOD *dtls1_get_client_method(int ver)
-{
- if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
- return (DTLSv1_client_method());
- else if (ver == DTLS1_2_VERSION)
- return (DTLSv1_2_client_method());
- else
- return (NULL);
-}
-
-IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
- DTLSv1_client_method,
- ssl_undefined_function,
- dtls1_connect,
- dtls1_get_client_method, DTLSv1_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
- DTLSv1_2_client_method,
- ssl_undefined_function,
- dtls1_connect,
- dtls1_get_client_method, DTLSv1_2_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
- DTLS_client_method,
- ssl_undefined_function,
- dtls1_connect,
- dtls1_get_client_method, DTLSv1_2_enc_data)
-
-
-enum MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
-{
- int al;
- unsigned int cookie_len;
- PACKET cookiepkt;
-
- if (!PACKET_forward(pkt, 2)
- || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- cookie_len = PACKET_remaining(&cookiepkt);
- if (cookie_len > sizeof(s->d1->cookie)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
- goto f_err;
- }
-
- if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- s->d1->cookie_len = cookie_len;
-
- return MSG_PROCESS_FINISHED_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
#include <stdio.h>
#define USE_SOCKETS
#include <openssl/objects.h>
+#include <openssl/rand.h>
#include "ssl_locl.h"
#if defined(OPENSSL_SYS_VMS)
static int dtls1_handshake_write(SSL *s);
int dtls1_listen(SSL *s, struct sockaddr *client);
+/* XDTLS: figure out the right values */
+static const unsigned int g_probable_mtu[] = { 1500, 512, 256 };
+
const SSL3_ENC_METHOD DTLSv1_enc_data = {
tls1_enc,
tls1_mac,
}
p = &buf[DTLS1_RT_HEADER_LENGTH];
- msglen = dtls1_raw_hello_verify_request(p + DTLS1_HM_HEADER_LENGTH,
- cookie, cookielen);
+ msglen = dtls_raw_hello_verify_request(p + DTLS1_HM_HEADER_LENGTH,
+ cookie, cookielen);
*p++ = DTLS1_MT_HELLO_VERIFY_REQUEST;
{
return dtls1_do_write(s, SSL3_RT_HANDSHAKE);
}
+
+#ifndef OPENSSL_NO_HEARTBEATS
+int dtls1_process_heartbeat(SSL *s, unsigned char *p, unsigned int length)
+{
+ unsigned char *pl;
+ unsigned short hbtype;
+ unsigned int payload;
+ unsigned int padding = 16; /* Use minimum padding */
+
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
+ p, length, s, s->msg_callback_arg);
+
+ /* Read type and payload length first */
+ if (1 + 2 + 16 > length)
+ return 0; /* silently discard */
+ if (length > SSL3_RT_MAX_PLAIN_LENGTH)
+ return 0; /* silently discard per RFC 6520 sec. 4 */
+
+ hbtype = *p++;
+ n2s(p, payload);
+ if (1 + 2 + payload + 16 > length)
+ return 0; /* silently discard per RFC 6520 sec. 4 */
+ pl = p;
+
+ if (hbtype == TLS1_HB_REQUEST) {
+ unsigned char *buffer, *bp;
+ unsigned int write_length = 1 /* heartbeat type */ +
+ 2 /* heartbeat length */ +
+ payload + padding;
+ int r;
+
+ if (write_length > SSL3_RT_MAX_PLAIN_LENGTH)
+ return 0;
+
+ /*
+ * Allocate memory for the response, size is 1 byte message type,
+ * plus 2 bytes payload length, plus payload, plus padding
+ */
+ buffer = OPENSSL_malloc(write_length);
+ if (buffer == NULL)
+ return -1;
+ bp = buffer;
+
+ /* Enter response type, length and copy payload */
+ *bp++ = TLS1_HB_RESPONSE;
+ s2n(payload, bp);
+ memcpy(bp, pl, payload);
+ bp += payload;
+ /* Random padding */
+ if (RAND_bytes(bp, padding) <= 0) {
+ OPENSSL_free(buffer);
+ return -1;
+ }
+
+ r = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, write_length);
+
+ if (r >= 0 && s->msg_callback)
+ s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
+ buffer, write_length, s, s->msg_callback_arg);
+
+ OPENSSL_free(buffer);
+
+ if (r < 0)
+ return r;
+ } else if (hbtype == TLS1_HB_RESPONSE) {
+ unsigned int seq;
+
+ /*
+ * We only send sequence numbers (2 bytes unsigned int), and 16
+ * random bytes, so we just try to read the sequence number
+ */
+ n2s(pl, seq);
+
+ if (payload == 18 && seq == s->tlsext_hb_seq) {
+ dtls1_stop_timer(s);
+ s->tlsext_hb_seq++;
+ s->tlsext_hb_pending = 0;
+ }
+ }
+
+ return 0;
+}
+
+int dtls1_heartbeat(SSL *s)
+{
+ unsigned char *buf, *p;
+ int ret = -1;
+ unsigned int payload = 18; /* Sequence number + random bytes */
+ unsigned int padding = 16; /* Use minimum padding */
+
+ /* Only send if peer supports and accepts HB requests... */
+ if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
+ s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
+ return -1;
+ }
+
+ /* ...and there is none in flight yet... */
+ if (s->tlsext_hb_pending) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PENDING);
+ return -1;
+ }
+
+ /* ...and no handshake in progress. */
+ if (SSL_in_init(s) || s->in_handshake) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_UNEXPECTED_MESSAGE);
+ return -1;
+ }
+
+ /*
+ * Check if padding is too long, payload and padding must not exceed 2^14
+ * - 3 = 16381 bytes in total.
+ */
+ OPENSSL_assert(payload + padding <= 16381);
+
+ /*-
+ * Create HeartBeat message, we just use a sequence number
+ * as payload to distuingish different messages and add
+ * some random stuff.
+ * - Message Type, 1 byte
+ * - Payload Length, 2 bytes (unsigned int)
+ * - Payload, the sequence number (2 bytes uint)
+ * - Payload, random bytes (16 bytes uint)
+ * - Padding
+ */
+ buf = OPENSSL_malloc(1 + 2 + payload + padding);
+ if (buf == NULL) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_MALLOC_FAILURE);
+ return -1;
+ }
+ p = buf;
+ /* Message Type */
+ *p++ = TLS1_HB_REQUEST;
+ /* Payload length (18 bytes here) */
+ s2n(payload, p);
+ /* Sequence number */
+ s2n(s->tlsext_hb_seq, p);
+ /* 16 random bytes */
+ if (RAND_bytes(p, 16) <= 0) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ p += 16;
+ /* Random padding */
+ if (RAND_bytes(p, padding) <= 0) {
+ SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ ret = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
+ if (ret >= 0) {
+ if (s->msg_callback)
+ s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
+ buf, 3 + payload + padding,
+ s, s->msg_callback_arg);
+
+ dtls1_start_timer(s);
+ s->tlsext_hb_pending = 1;
+ }
+
+ err:
+ OPENSSL_free(buf);
+
+ return ret;
+}
+#endif
+
+int dtls1_shutdown(SSL *s)
+{
+ int ret;
+#ifndef OPENSSL_NO_SCTP
+ BIO *wbio;
+
+ wbio = SSL_get_wbio(s);
+ if (wbio != NULL && BIO_dgram_is_sctp(wbio) &&
+ !(s->shutdown & SSL_SENT_SHUTDOWN)) {
+ ret = BIO_dgram_sctp_wait_for_dry(wbio);
+ if (ret < 0)
+ return -1;
+
+ if (ret == 0)
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 1,
+ NULL);
+ }
+#endif
+ ret = ssl3_shutdown(s);
+#ifndef OPENSSL_NO_SCTP
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 0, NULL);
+#endif
+ return ret;
+}
+
+int dtls1_query_mtu(SSL *s)
+{
+ if (s->d1->link_mtu) {
+ s->d1->mtu =
+ s->d1->link_mtu - BIO_dgram_get_mtu_overhead(SSL_get_wbio(s));
+ s->d1->link_mtu = 0;
+ }
+
+ /* AHA! Figure out the MTU, and stick to the right size */
+ if (s->d1->mtu < dtls1_min_mtu(s)) {
+ if (!(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) {
+ s->d1->mtu =
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
+
+ /*
+ * I've seen the kernel return bogus numbers when it doesn't know
+ * (initial write), so just make sure we have a reasonable number
+ */
+ if (s->d1->mtu < dtls1_min_mtu(s)) {
+ /* Set to min mtu */
+ s->d1->mtu = dtls1_min_mtu(s);
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SET_MTU,
+ s->d1->mtu, NULL);
+ }
+ } else
+ return 0;
+ }
+ return 1;
+}
+
+unsigned int dtls1_link_min_mtu(void)
+{
+ return (g_probable_mtu[(sizeof(g_probable_mtu) /
+ sizeof(g_probable_mtu[0])) - 1]);
+}
+
+unsigned int dtls1_min_mtu(SSL *s)
+{
+ return dtls1_link_min_mtu() - BIO_dgram_get_mtu_overhead(SSL_get_wbio(s));
+}
+++ /dev/null
-/* ssl/d1_meth.h */
-/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <stdio.h>
-#include <openssl/objects.h>
-#include "ssl_locl.h"
-
-static const SSL_METHOD *dtls1_get_method(int ver);
-static const SSL_METHOD *dtls1_get_method(int ver)
-{
- if (ver == DTLS1_VERSION)
- return (DTLSv1_method());
- else if (ver == DTLS1_2_VERSION)
- return (DTLSv1_2_method());
- else
- return (NULL);
-}
-
-IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
- DTLSv1_method,
- dtls1_accept,
- dtls1_connect, dtls1_get_method, DTLSv1_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
- DTLSv1_2_method,
- dtls1_accept,
- dtls1_connect, dtls1_get_method, DTLSv1_2_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
- DTLS_method,
- dtls1_accept,
- dtls1_connect, dtls1_get_method, DTLSv1_2_enc_data)
+++ /dev/null
-/* ssl/d1_srvr.c */
-/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-#include <openssl/md5.h>
-#include <openssl/bn.h>
-#ifndef OPENSSL_NO_DH
-# include <openssl/dh.h>
-#endif
-
-static const SSL_METHOD *dtls1_get_server_method(int ver);
-
-static const SSL_METHOD *dtls1_get_server_method(int ver)
-{
- if (ver == DTLS1_VERSION)
- return (DTLSv1_server_method());
- else if (ver == DTLS1_2_VERSION)
- return (DTLSv1_2_server_method());
- else
- return (NULL);
-}
-
-IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
- DTLSv1_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method, DTLSv1_enc_data)
-
-IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
- DTLSv1_2_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method, DTLSv1_2_enc_data)
-
-IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
- DTLS_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method, DTLSv1_2_enc_data)
-
-
-unsigned int dtls1_raw_hello_verify_request(unsigned char *buf,
- unsigned char *cookie,
- unsigned char cookie_len)
-{
- unsigned int msg_len;
- unsigned char *p;
-
- p = buf;
- /* Always use DTLS 1.0 version: see RFC 6347 */
- *(p++) = DTLS1_VERSION >> 8;
- *(p++) = DTLS1_VERSION & 0xFF;
-
- *(p++) = (unsigned char)cookie_len;
- memcpy(p, cookie, cookie_len);
- p += cookie_len;
- msg_len = p - buf;
-
- return msg_len;
-}
-
-
-int dtls_construct_hello_verify_request(SSL *s)
-{
- unsigned int len;
- unsigned char *buf;
-
- buf = (unsigned char *)s->init_buf->data;
-
- if (s->ctx->app_gen_cookie_cb == NULL ||
- s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
- &(s->d1->cookie_len)) == 0 ||
- s->d1->cookie_len > 255) {
- SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,
- SSL_R_COOKIE_GEN_CALLBACK_FAILURE);
- statem_set_error(s);
- return 0;
- }
-
- len = dtls1_raw_hello_verify_request(&buf[DTLS1_HM_HEADER_LENGTH],
- s->d1->cookie, s->d1->cookie_len);
-
- dtls1_set_message_header(s, buf, DTLS1_MT_HELLO_VERIFY_REQUEST, len, 0,
- len);
- len += DTLS1_HM_HEADER_LENGTH;
-
- /* number of bytes to write */
- s->init_num = len;
- s->init_off = 0;
-
- return 1;
-}
--- /dev/null
+/* ssl/t1_meth.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <openssl/objects.h>
+#include "ssl_locl.h"
+
+/*
+ * TLS/SSLv3 methods
+ */
+
+static const SSL_METHOD *tls1_get_method(int ver)
+{
+ if (ver == TLS_ANY_VERSION)
+ return TLS_method();
+ if (ver == TLS1_2_VERSION)
+ return TLSv1_2_method();
+ if (ver == TLS1_1_VERSION)
+ return TLSv1_1_method();
+ if (ver == TLS1_VERSION)
+ return TLSv1_method();
+#ifndef OPENSSL_NO_SSL3
+ if (ver == SSL3_VERSION)
+ return (SSLv3_method());
+ else
+#endif
+ return NULL;
+}
+
+IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_method,
+ statem_accept,
+ statem_connect, tls1_get_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_method,
+ statem_accept,
+ statem_connect, tls1_get_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_method,
+ statem_accept,
+ statem_connect, tls1_get_method, TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_method,
+ statem_accept,
+ statem_connect, tls1_get_method, TLSv1_enc_data)
+
+#ifndef OPENSSL_NO_SSL3_METHOD
+IMPLEMENT_ssl3_meth_func(SSLv3_method,
+ statem_accept, statem_connect, tls1_get_method)
+#endif
+
+
+/*
+ * TLS/SSLv3 server methods
+ */
+
+static const SSL_METHOD *tls1_get_server_method(int ver)
+{
+ if (ver == TLS_ANY_VERSION)
+ return TLS_server_method();
+ if (ver == TLS1_2_VERSION)
+ return TLSv1_2_server_method();
+ if (ver == TLS1_1_VERSION)
+ return TLSv1_1_server_method();
+ if (ver == TLS1_VERSION)
+ return TLSv1_server_method();
+#ifndef OPENSSL_NO_SSL3
+ if (ver == SSL3_VERSION)
+ return (SSLv3_server_method());
+#endif
+ return NULL;
+}
+
+IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ tls1_get_server_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ tls1_get_server_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ tls1_get_server_method, TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ tls1_get_server_method, TLSv1_enc_data)
+
+#ifndef OPENSSL_NO_SSL3_METHOD
+IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
+ statem_accept,
+ ssl_undefined_function, tls1_get_server_method)
+#endif
+
+
+/*
+ * TLS/SSLv3 client methods
+ */
+
+static const SSL_METHOD *tls1_get_client_method(int ver)
+{
+ if (ver == TLS_ANY_VERSION)
+ return TLS_client_method();
+ if (ver == TLS1_2_VERSION)
+ return TLSv1_2_client_method();
+ if (ver == TLS1_1_VERSION)
+ return TLSv1_1_client_method();
+ if (ver == TLS1_VERSION)
+ return TLSv1_client_method();
+#ifndef OPENSSL_NO_SSL3
+ if (ver == SSL3_VERSION)
+ return (SSLv3_client_method());
+#endif
+ return NULL;
+}
+
+IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ tls1_get_client_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ tls1_get_client_method, TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ tls1_get_client_method, TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_client_method,
+ ssl_undefined_function,
+ statem_connect, tls1_get_client_method, TLSv1_enc_data)
+
+#ifndef OPENSSL_NO_SSL3_METHOD
+IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
+ ssl_undefined_function,
+ statem_connect, tls1_get_client_method)
+#endif
+
+
+/*
+ * DTLS methods
+ */
+static const SSL_METHOD *dtls1_get_method(int ver)
+{
+ if (ver == DTLS1_VERSION)
+ return (DTLSv1_method());
+ else if (ver == DTLS1_2_VERSION)
+ return (DTLSv1_2_method());
+ else
+ return (NULL);
+}
+
+IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
+ DTLSv1_method,
+ statem_accept,
+ statem_connect, dtls1_get_method, DTLSv1_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+ DTLSv1_2_method,
+ statem_accept,
+ statem_connect, dtls1_get_method, DTLSv1_2_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
+ DTLS_method,
+ statem_accept,
+ statem_connect, dtls1_get_method, DTLSv1_2_enc_data)
+
+
+/*
+ * DTLS server methods
+ */
+
+static const SSL_METHOD *dtls1_get_server_method(int ver)
+{
+ if (ver == DTLS1_VERSION)
+ return (DTLSv1_server_method());
+ else if (ver == DTLS1_2_VERSION)
+ return (DTLSv1_2_server_method());
+ else
+ return (NULL);
+}
+
+IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
+ DTLSv1_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ dtls1_get_server_method, DTLSv1_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+ DTLSv1_2_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ dtls1_get_server_method, DTLSv1_2_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
+ DTLS_server_method,
+ statem_accept,
+ ssl_undefined_function,
+ dtls1_get_server_method, DTLSv1_2_enc_data)
+
+
+/*
+ * DTLS client methods
+ */
+
+static const SSL_METHOD *dtls1_get_client_method(int ver)
+{
+ if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
+ return (DTLSv1_client_method());
+ else if (ver == DTLS1_2_VERSION)
+ return (DTLSv1_2_client_method());
+ else
+ return (NULL);
+}
+
+IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
+ DTLSv1_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ dtls1_get_client_method, DTLSv1_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+ DTLSv1_2_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ dtls1_get_client_method, DTLSv1_2_enc_data)
+
+IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
+ DTLS_client_method,
+ ssl_undefined_function,
+ statem_connect,
+ dtls1_get_client_method, DTLSv1_2_enc_data)
+++ /dev/null
-/* ssl/s3_both.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECC cipher suite support in OpenSSL originally developed by
- * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
- */
-
-#include <limits.h>
-#include <string.h>
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-
-/*
- * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
- * SSL3_RT_CHANGE_CIPHER_SPEC)
- */
-int ssl3_do_write(SSL *s, int type)
-{
- int ret;
-
- ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
- s->init_num);
- if (ret < 0)
- return (-1);
- if (type == SSL3_RT_HANDSHAKE)
- /*
- * should not be done for 'Hello Request's, but in that case we'll
- * ignore the result anyway
- */
- ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off],
- ret);
-
- if (ret == s->init_num) {
- if (s->msg_callback)
- s->msg_callback(1, s->version, type, s->init_buf->data,
- (size_t)(s->init_off + s->init_num), s,
- s->msg_callback_arg);
- return (1);
- }
- s->init_off += ret;
- s->init_num -= ret;
- return (0);
-}
-
-int tls_construct_finished(SSL *s, const char *sender, int slen)
-{
- unsigned char *p;
- int i;
- unsigned long l;
-
- p = ssl_handshake_start(s);
-
- i = s->method->ssl3_enc->final_finish_mac(s,
- sender, slen,
- s->s3->tmp.finish_md);
- if (i <= 0)
- return 0;
- s->s3->tmp.finish_md_len = i;
- memcpy(p, s->s3->tmp.finish_md, i);
- l = i;
-
- /*
- * Copy the finished so we can use it for renegotiation checks
- */
- if (!s->server) {
- OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
- memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
- s->s3->previous_client_finished_len = i;
- } else {
- OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
- memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
- s->s3->previous_server_finished_len = i;
- }
-
- if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- return 1;
-}
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
-/*
- * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
- * to far.
- */
-static void ssl3_take_mac(SSL *s)
-{
- const char *sender;
- int slen;
- /*
- * If no new cipher setup return immediately: other functions will set
- * the appropriate error.
- */
- if (s->s3->tmp.new_cipher == NULL)
- return;
- if (!s->server) {
- sender = s->method->ssl3_enc->server_finished_label;
- slen = s->method->ssl3_enc->server_finished_label_len;
- } else {
- sender = s->method->ssl3_enc->client_finished_label;
- slen = s->method->ssl3_enc->client_finished_label_len;
- }
-
- s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
- sender,
- slen,
- s->s3->tmp.peer_finish_md);
-}
-#endif
-
-enum MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
-{
- int al;
- long remain;
-
- remain = PACKET_remaining(pkt);
- /*
- * 'Change Cipher Spec' is just a single byte, which should already have
- * been consumed by ssl_get_message() so there should be no bytes left,
- * unless we're using DTLS1_BAD_VER, which has an extra 2 bytes
- */
- if (SSL_IS_DTLS(s)) {
- if ((s->version == DTLS1_BAD_VER
- && remain != DTLS1_CCS_HEADER_LENGTH + 1)
- || (s->version != DTLS1_BAD_VER
- && remain != DTLS1_CCS_HEADER_LENGTH - 1)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
- SSL_R_BAD_CHANGE_CIPHER_SPEC);
- goto f_err;
- }
- } else {
- if (remain != 0) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
- SSL_R_BAD_CHANGE_CIPHER_SPEC);
- goto f_err;
- }
- }
-
- /* Check we have a cipher to change to */
- if (s->s3->tmp.new_cipher == NULL) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY);
- goto f_err;
- }
-
- s->s3->change_cipher_spec = 1;
- if (!ssl3_do_change_cipher_spec(s)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
-
- if (SSL_IS_DTLS(s)) {
- dtls1_reset_seq_numbers(s, SSL3_CC_READ);
-
- if (s->version == DTLS1_BAD_VER)
- s->d1->handshake_read_seq++;
-
-#ifndef OPENSSL_NO_SCTP
- /*
- * Remember that a CCS has been received, so that an old key of
- * SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no
- * SCTP is used
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL);
-#endif
- }
-
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt)
-{
- int al, i;
-
- /* If this occurs, we have missed a message */
- if (!s->s3->change_cipher_spec) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
- goto f_err;
- }
- s->s3->change_cipher_spec = 0;
-
- i = s->s3->tmp.peer_finish_md_len;
-
- if (i < 0 || (unsigned long)i != PACKET_remaining(pkt)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
- goto f_err;
- }
-
- if (CRYPTO_memcmp(PACKET_data(pkt), s->s3->tmp.peer_finish_md, i) != 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
- goto f_err;
- }
-
- /*
- * Copy the finished so we can use it for renegotiation checks
- */
- if (s->server) {
- OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
- memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
- s->s3->previous_client_finished_len = i;
- } else {
- OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
- memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
- s->s3->previous_server_finished_len = i;
- }
-
- return MSG_PROCESS_CONTINUE_PROCESSING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-int tls_construct_change_cipher_spec(SSL *s)
-{
- unsigned char *p;
-
- p = (unsigned char *)s->init_buf->data;
- *p = SSL3_MT_CCS;
- s->init_num = 1;
- s->init_off = 0;
-
- return 1;
-}
-
-unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
-{
- unsigned char *p;
- unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
-
- if (!ssl_add_cert_chain(s, cpk, &l))
- return 0;
-
- l -= 3 + SSL_HM_HEADER_LENGTH(s);
- p = ssl_handshake_start(s);
- l2n3(l, p);
- l += 3;
-
- if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) {
- SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- return l + SSL_HM_HEADER_LENGTH(s);
-}
-
-enum WORK_STATE tls_finish_handshake(SSL *s, enum WORK_STATE wst)
-{
- void (*cb) (const SSL *ssl, int type, int val) = NULL;
-
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- enum WORK_STATE ret;
- ret = dtls_wait_for_dry(s);
- if (ret != WORK_FINISHED_CONTINUE)
- return ret;
- }
-#endif
-
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
- if (!SSL_IS_DTLS(s)) {
- /*
- * We don't do this in DTLS because we may still need the init_buf
- * in case there are any unexpected retransmits
- */
- BUF_MEM_free(s->init_buf);
- s->init_buf = NULL;
- }
-
- ssl_free_wbio_buffer(s);
-
- s->init_num = 0;
-
- if (!s->server || s->renegotiate == 2) {
- /* skipped if we just sent a HelloRequest */
- s->renegotiate = 0;
- s->new_session = 0;
-
- if (s->server) {
- s->renegotiate = 0;
- s->new_session = 0;
-
- ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
-
- s->ctx->stats.sess_accept_good++;
- s->handshake_func = ssl3_accept;
- } else {
- ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
- if (s->hit)
- s->ctx->stats.sess_hit++;
-
- s->handshake_func = ssl3_connect;
- s->ctx->stats.sess_connect_good++;
- }
-
- if (s->info_callback != NULL)
- cb = s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb = s->ctx->info_callback;
-
- if (cb != NULL)
- cb(s, SSL_CB_HANDSHAKE_DONE, 1);
-
- if (SSL_IS_DTLS(s)) {
- /* done with handshaking */
- s->d1->handshake_read_seq = 0;
- s->d1->handshake_write_seq = 0;
- s->d1->next_handshake_write_seq = 0;
- }
- }
-
- return WORK_FINISHED_STOP;
-}
-
-int tls_get_message_header(SSL *s, int *mt)
-{
- /* s->init_num < SSL3_HM_HEADER_LENGTH */
- int skip_message, i, recvd_type, al;
- unsigned char *p;
- unsigned long l;
-
- p = (unsigned char *)s->init_buf->data;
-
- do {
- while (s->init_num < SSL3_HM_HEADER_LENGTH) {
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type,
- &p[s->init_num], SSL3_HM_HEADER_LENGTH - s->init_num, 0);
- if (i <= 0) {
- s->rwstate = SSL_READING;
- return 0;
- }
- if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) {
- s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
- s->init_num = i - 1;
- s->s3->tmp.message_size = i;
- return 1;
- } else if (recvd_type != SSL3_RT_HANDSHAKE) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY);
- goto f_err;
- }
- s->init_num += i;
- }
-
- skip_message = 0;
- if (!s->server)
- if (p[0] == SSL3_MT_HELLO_REQUEST)
- /*
- * The server may always send 'Hello Request' messages --
- * we are doing a handshake anyway now, so ignore them if
- * their format is correct. Does not count for 'Finished'
- * MAC.
- */
- if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
- s->init_num = 0;
- skip_message = 1;
-
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
- p, SSL3_HM_HEADER_LENGTH, s,
- s->msg_callback_arg);
- }
- } while (skip_message);
- /* s->init_num == SSL3_HM_HEADER_LENGTH */
-
- *mt = *p;
- s->s3->tmp.message_type = *(p++);
-
- if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
- /*
- * Only happens with SSLv3+ in an SSLv2 backward compatible
- * ClientHello
- */
- /*
- * Total message size is the remaining record bytes to read
- * plus the SSL3_HM_HEADER_LENGTH bytes that we already read
- */
- l = RECORD_LAYER_get_rrec_length(&s->rlayer)
- + SSL3_HM_HEADER_LENGTH;
- if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l)) {
- SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB);
- goto err;
- }
- s->s3->tmp.message_size = l;
-
- s->init_msg = s->init_buf->data;
- s->init_num = SSL3_HM_HEADER_LENGTH;
- } else {
- n2l3(p, l);
- /* BUF_MEM_grow takes an 'int' parameter */
- if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE);
- goto f_err;
- }
- if (l && !BUF_MEM_grow_clean(s->init_buf,
- (int)l + SSL3_HM_HEADER_LENGTH)) {
- SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB);
- goto err;
- }
- s->s3->tmp.message_size = l;
-
- s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
- s->init_num = 0;
- }
-
- return 1;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- return 0;
-}
-
-int tls_get_message_body(SSL *s, unsigned long *len)
-{
- long n;
- unsigned char *p;
- int i;
-
- if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) {
- /* We've already read everything in */
- *len = (unsigned long)s->init_num;
- return 1;
- }
-
- p = s->init_msg;
- n = s->s3->tmp.message_size - s->init_num;
- while (n > 0) {
- i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
- &p[s->init_num], n, 0);
- if (i <= 0) {
- s->rwstate = SSL_READING;
- *len = 0;
- return 0;
- }
- s->init_num += i;
- n -= i;
- }
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- /*
- * If receiving Finished, record MAC of prior handshake messages for
- * Finished verification.
- */
- if (*s->init_buf->data == SSL3_MT_FINISHED)
- ssl3_take_mac(s);
-#endif
-
- /* Feed this message into MAC computation. */
- if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
- ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num);
- if (s->msg_callback)
- s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data,
- (size_t)s->init_num, s, s->msg_callback_arg);
- } else {
- ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
- s->init_num + SSL3_HM_HEADER_LENGTH);
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
- (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
- s->msg_callback_arg);
- }
-
- /*
- * init_num should never be negative...should probably be declared
- * unsigned
- */
- if (s->init_num < 0) {
- SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- *len = 0;
- return 0;
- }
- *len = (unsigned long)s->init_num;
- return 1;
-}
-
-int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
-{
- EVP_PKEY *pk;
- int ret = -1, i;
-
- if (pkey == NULL)
- pk = X509_get_pubkey(x);
- else
- pk = pkey;
- if (pk == NULL)
- goto err;
-
- i = pk->type;
- if (i == EVP_PKEY_RSA) {
- ret = SSL_PKEY_RSA_ENC;
- } else if (i == EVP_PKEY_DSA) {
- ret = SSL_PKEY_DSA_SIGN;
- }
-#ifndef OPENSSL_NO_EC
- else if (i == EVP_PKEY_EC) {
- ret = SSL_PKEY_ECC;
- }
-#endif
- else if (i == NID_id_GostR3410_2001) {
- ret = SSL_PKEY_GOST01;
- } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) {
- /*
- * For DH two cases: DH certificate signed with RSA and DH
- * certificate signed with DSA.
- */
- i = X509_certificate_type(x, pk);
- if (i & EVP_PKS_RSA)
- ret = SSL_PKEY_DH_RSA;
- else if (i & EVP_PKS_DSA)
- ret = SSL_PKEY_DH_DSA;
- }
-
- err:
- if (!pkey)
- EVP_PKEY_free(pk);
- return (ret);
-}
-
-int ssl_verify_alarm_type(long type)
-{
- int al;
-
- switch (type) {
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
- case X509_V_ERR_UNABLE_TO_GET_CRL:
- case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
- al = SSL_AD_UNKNOWN_CA;
- break;
- case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
- case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
- case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
- case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
- case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
- case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
- case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
- case X509_V_ERR_CERT_NOT_YET_VALID:
- case X509_V_ERR_CRL_NOT_YET_VALID:
- case X509_V_ERR_CERT_UNTRUSTED:
- case X509_V_ERR_CERT_REJECTED:
- al = SSL_AD_BAD_CERTIFICATE;
- break;
- case X509_V_ERR_CERT_SIGNATURE_FAILURE:
- case X509_V_ERR_CRL_SIGNATURE_FAILURE:
- al = SSL_AD_DECRYPT_ERROR;
- break;
- case X509_V_ERR_CERT_HAS_EXPIRED:
- case X509_V_ERR_CRL_HAS_EXPIRED:
- al = SSL_AD_CERTIFICATE_EXPIRED;
- break;
- case X509_V_ERR_CERT_REVOKED:
- al = SSL_AD_CERTIFICATE_REVOKED;
- break;
- case X509_V_ERR_OUT_OF_MEM:
- al = SSL_AD_INTERNAL_ERROR;
- break;
- case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
- case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
- case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
- case X509_V_ERR_CERT_CHAIN_TOO_LONG:
- case X509_V_ERR_PATH_LENGTH_EXCEEDED:
- case X509_V_ERR_INVALID_CA:
- al = SSL_AD_UNKNOWN_CA;
- break;
- case X509_V_ERR_APPLICATION_VERIFICATION:
- al = SSL_AD_HANDSHAKE_FAILURE;
- break;
- case X509_V_ERR_INVALID_PURPOSE:
- al = SSL_AD_UNSUPPORTED_CERTIFICATE;
- break;
- default:
- al = SSL_AD_CERTIFICATE_UNKNOWN;
- break;
- }
- return (al);
-}
-
-int ssl_allow_compression(SSL *s)
-{
- if (s->options & SSL_OP_NO_COMPRESSION)
- return 0;
- return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL);
-}
+++ /dev/null
-/* ssl/s3_clnt.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- *
- * Portions of the attached software ("Contribution") are developed by
- * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
- *
- * The Contribution is licensed pursuant to the OpenSSL open source
- * license provided above.
- *
- * ECC cipher suite support in OpenSSL originally written by
- * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
- *
- */
-/* ====================================================================
- * Copyright 2005 Nokia. All rights reserved.
- *
- * The portions of the attached software ("Contribution") is developed by
- * Nokia Corporation and is licensed pursuant to the OpenSSL open source
- * license.
- *
- * The Contribution, originally written by Mika Kousa and Pasi Eronen of
- * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
- * support (see RFC 4279) to OpenSSL.
- *
- * No patent licenses or other rights except those expressly stated in
- * the OpenSSL open source license shall be deemed granted or received
- * expressly, by implication, estoppel, or otherwise.
- *
- * No assurances are provided by Nokia that the Contribution does not
- * infringe the patent or other intellectual property rights of any third
- * party or that the license provides you with all the necessary rights
- * to make use of the Contribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
- * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
- * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
- * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
- * OTHERWISE.
- */
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/md5.h>
-#ifndef OPENSSL_NO_DH
-# include <openssl/dh.h>
-#endif
-#include <openssl/bn.h>
-#ifndef OPENSSL_NO_ENGINE
-# include <openssl/engine.h>
-#endif
-
-static int ssl_set_version(SSL *s);
-static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
-static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p);
-
-/*
- * Work out what version we should be using for the initial ClientHello if
- * the version is currently set to (D)TLS_ANY_VERSION.
- * Returns 1 on success
- * Returns 0 on error
- */
-static int ssl_set_version(SSL *s)
-{
- unsigned long mask, options = s->options;
-
- if (s->method->version == TLS_ANY_VERSION) {
- /*
- * SSL_OP_NO_X disables all protocols above X *if* there are
- * some protocols below X enabled. This is required in order
- * to maintain "version capability" vector contiguous. So
- * that if application wants to disable TLS1.0 in favour of
- * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
- * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
- */
- mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
-#if !defined(OPENSSL_NO_SSL3)
- | SSL_OP_NO_SSLv3
-#endif
- ;
-#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
- if (options & SSL_OP_NO_TLSv1_2) {
- if ((options & mask) != mask) {
- s->version = TLS1_1_VERSION;
- } else {
- SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
- return 0;
- }
- } else {
- s->version = TLS1_2_VERSION;
- }
-#else
- if ((options & mask) == mask) {
- SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
- return 0;
- }
- s->version = TLS1_1_VERSION;
-#endif
-
- mask &= ~SSL_OP_NO_TLSv1_1;
- if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
- s->version = TLS1_VERSION;
- mask &= ~SSL_OP_NO_TLSv1;
-#if !defined(OPENSSL_NO_SSL3)
- if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
- s->version = SSL3_VERSION;
-#endif
-
- if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
- SSLerr(SSL_F_SSL_SET_VERSION,
- SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
- return 0;
- }
-
- if (s->version == SSL3_VERSION && FIPS_mode()) {
- SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
- return 0;
- }
-
- } else if (s->method->version == DTLS_ANY_VERSION) {
- /* Determine which DTLS version to use */
- /* If DTLS 1.2 disabled correct the version number */
- if (options & SSL_OP_NO_DTLSv1_2) {
- if (tls1_suiteb(s)) {
- SSLerr(SSL_F_SSL_SET_VERSION,
- SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
- return 0;
- }
- /*
- * Disabling all versions is silly: return an error.
- */
- if (options & SSL_OP_NO_DTLSv1) {
- SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
- return 0;
- }
- /*
- * Update method so we don't use any DTLS 1.2 features.
- */
- s->method = DTLSv1_client_method();
- s->version = DTLS1_VERSION;
- } else {
- /*
- * We only support one version: update method
- */
- if (options & SSL_OP_NO_DTLSv1)
- s->method = DTLSv1_2_client_method();
- s->version = DTLS1_2_VERSION;
- }
- }
-
- s->client_version = s->version;
-
- return 1;
-}
-
-int tls_construct_client_hello(SSL *s)
-{
- unsigned char *buf;
- unsigned char *p, *d;
- int i;
- unsigned long l;
- int al = 0;
-#ifndef OPENSSL_NO_COMP
- int j;
- SSL_COMP *comp;
-#endif
- SSL_SESSION *sess = s->session;
-
- buf = (unsigned char *)s->init_buf->data;
-
- /* Work out what SSL/TLS/DTLS version to use */
- if (ssl_set_version(s) == 0)
- goto err;
-
- if ((sess == NULL) || (sess->ssl_version != s->version) ||
- /*
- * In the case of EAP-FAST, we can have a pre-shared
- * "ticket" without a session ID.
- */
- (!sess->session_id_length && !sess->tlsext_tick) ||
- (sess->not_resumable)) {
- if (!ssl_get_new_session(s, 0))
- goto err;
- }
- /* else use the pre-loaded session */
-
- p = s->s3->client_random;
-
- /*
- * for DTLS if client_random is initialized, reuse it, we are
- * required to use same upon reply to HelloVerify
- */
- if (SSL_IS_DTLS(s)) {
- size_t idx;
- i = 1;
- for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
- if (p[idx]) {
- i = 0;
- break;
- }
- }
- } else
- i = 1;
-
- if (i && ssl_fill_hello_random(s, 0, p,
- sizeof(s->s3->client_random)) <= 0)
- goto err;
-
- /* Do the message type and length last */
- d = p = ssl_handshake_start(s);
-
- /*-
- * version indicates the negotiated version: for example from
- * an SSLv2/v3 compatible client hello). The client_version
- * field is the maximum version we permit and it is also
- * used in RSA encrypted premaster secrets. Some servers can
- * choke if we initially report a higher version then
- * renegotiate to a lower one in the premaster secret. This
- * didn't happen with TLS 1.0 as most servers supported it
- * but it can with TLS 1.1 or later if the server only supports
- * 1.0.
- *
- * Possible scenario with previous logic:
- * 1. Client hello indicates TLS 1.2
- * 2. Server hello says TLS 1.0
- * 3. RSA encrypted premaster secret uses 1.2.
- * 4. Handhaked proceeds using TLS 1.0.
- * 5. Server sends hello request to renegotiate.
- * 6. Client hello indicates TLS v1.0 as we now
- * know that is maximum server supports.
- * 7. Server chokes on RSA encrypted premaster secret
- * containing version 1.0.
- *
- * For interoperability it should be OK to always use the
- * maximum version we support in client hello and then rely
- * on the checking of version to ensure the servers isn't
- * being inconsistent: for example initially negotiating with
- * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
- * client_version in client hello and not resetting it to
- * the negotiated version.
- */
- *(p++) = s->client_version >> 8;
- *(p++) = s->client_version & 0xff;
-
- /* Random stuff */
- memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
- p += SSL3_RANDOM_SIZE;
-
- /* Session ID */
- if (s->new_session)
- i = 0;
- else
- i = s->session->session_id_length;
- *(p++) = i;
- if (i != 0) {
- if (i > (int)sizeof(s->session->session_id)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- memcpy(p, s->session->session_id, i);
- p += i;
- }
-
- /* cookie stuff for DTLS */
- if (SSL_IS_DTLS(s)) {
- if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- *(p++) = s->d1->cookie_len;
- memcpy(p, s->d1->cookie, s->d1->cookie_len);
- p += s->d1->cookie_len;
- }
-
- /* Ciphers supported */
- i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
- if (i == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
- goto err;
- }
-#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
- /*
- * Some servers hang if client hello > 256 bytes as hack workaround
- * chop number of supported ciphers to keep it well below this if we
- * use TLS v1.2
- */
- if (TLS1_get_version(s) >= TLS1_2_VERSION
- && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
- i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
-#endif
- s2n(i, p);
- p += i;
-
- /* COMPRESSION */
-#ifdef OPENSSL_NO_COMP
- *(p++) = 1;
-#else
-
- if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
- j = 0;
- else
- j = sk_SSL_COMP_num(s->ctx->comp_methods);
- *(p++) = 1 + j;
- for (i = 0; i < j; i++) {
- comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
- *(p++) = comp->id;
- }
-#endif
- *(p++) = 0; /* Add the NULL method */
-
- /* TLS extensions */
- if (ssl_prepare_clienthello_tlsext(s) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
- goto err;
- }
- if ((p =
- ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
- &al)) == NULL) {
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- l = p - d;
- if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- return 1;
- err:
- statem_set_error(s);
- return 0;
-}
-
-enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
-{
- STACK_OF(SSL_CIPHER) *sk;
- const SSL_CIPHER *c;
- PACKET session_id;
- size_t session_id_len;
- unsigned char *cipherchars;
- int i, al = SSL_AD_INTERNAL_ERROR;
- unsigned int compression;
-#ifndef OPENSSL_NO_COMP
- SSL_COMP *comp;
-#endif
-
- if (s->method->version == TLS_ANY_VERSION) {
- unsigned int sversion;
-
- if (!PACKET_get_net_2(pkt, &sversion)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
-#if TLS_MAX_VERSION != TLS1_2_VERSION
-#error Code needs updating for new TLS version
-#endif
-#ifndef OPENSSL_NO_SSL3
- if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
- if (FIPS_mode()) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- s->method = SSLv3_client_method();
- } else
-#endif
- if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
- s->method = TLSv1_client_method();
- } else if ((sversion == TLS1_1_VERSION) &&
- !(s->options & SSL_OP_NO_TLSv1_1)) {
- s->method = TLSv1_1_client_method();
- } else if ((sversion == TLS1_2_VERSION) &&
- !(s->options & SSL_OP_NO_TLSv1_2)) {
- s->method = TLSv1_2_client_method();
- } else {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- s->session->ssl_version = s->version = s->method->version;
-
- if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- } else if (s->method->version == DTLS_ANY_VERSION) {
- /* Work out correct protocol version to use */
- unsigned int hversion;
- int options;
-
- if (!PACKET_get_net_2(pkt, &hversion)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- options = s->options;
- if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
- s->method = DTLSv1_2_client_method();
- else if (tls1_suiteb(s)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
- s->version = hversion;
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
- s->method = DTLSv1_client_method();
- else {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
- s->version = hversion;
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- s->session->ssl_version = s->version = s->method->version;
- } else {
- unsigned char *vers;
-
- if (!PACKET_get_bytes(pkt, &vers, 2)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- if ((vers[0] != (s->version >> 8))
- || (vers[1] != (s->version & 0xff))) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
- s->version = (s->version & 0xff00) | vers[1];
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- }
-
- /* load the server hello data */
- /* load the server random */
- if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- s->hit = 0;
-
- /* Get the session-id. */
- if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- session_id_len = PACKET_remaining(&session_id);
- if (session_id_len > sizeof s->session->session_id
- || session_id_len > SSL3_SESSION_ID_SIZE) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
- goto f_err;
- }
-
- if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
- SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-
- /*
- * Check if we can resume the session based on external pre-shared secret.
- * EAP-FAST (RFC 4851) supports two types of session resumption.
- * Resumption based on server-side state works with session IDs.
- * Resumption based on pre-shared Protected Access Credentials (PACs)
- * works by overriding the SessionTicket extension at the application
- * layer, and does not send a session ID. (We do not know whether EAP-FAST
- * servers would honour the session ID.) Therefore, the session ID alone
- * is not a reliable indicator of session resumption, so we first check if
- * we can resume, and later peek at the next handshake message to see if the
- * server wants to resume.
- */
- if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
- s->session->tlsext_tick) {
- SSL_CIPHER *pref_cipher = NULL;
- s->session->master_key_length = sizeof(s->session->master_key);
- if (s->tls_session_secret_cb(s, s->session->master_key,
- &s->session->master_key_length,
- NULL, &pref_cipher,
- s->tls_session_secret_cb_arg)) {
- s->session->cipher = pref_cipher ?
- pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
- } else {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
- }
-
- if (session_id_len != 0 && session_id_len == s->session->session_id_length
- && memcmp(PACKET_data(&session_id), s->session->session_id,
- session_id_len) == 0) {
- if (s->sid_ctx_length != s->session->sid_ctx_length
- || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
- /* actually a client application bug */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
- goto f_err;
- }
- s->hit = 1;
- } else {
- /*
- * If we were trying for session-id reuse but the server
- * didn't echo the ID, make a new SSL_SESSION.
- * In the case of EAP-FAST and PAC, we do not send a session ID,
- * so the PAC-based session secret is always preserved. It'll be
- * overwritten if the server refuses resumption.
- */
- if (s->session->session_id_length > 0) {
- if (!ssl_get_new_session(s, 0)) {
- goto f_err;
- }
- }
-
- s->session->session_id_length = session_id_len;
- /* session_id_len could be 0 */
- memcpy(s->session->session_id, PACKET_data(&session_id),
- session_id_len);
- }
-
- c = ssl_get_cipher_by_char(s, cipherchars);
- if (c == NULL) {
- /* unknown cipher */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
- goto f_err;
- }
- /* Set version disabled mask now we know version */
- if (!SSL_USE_TLS1_2_CIPHERS(s))
- s->s3->tmp.mask_ssl = SSL_TLSV1_2;
- else
- s->s3->tmp.mask_ssl = 0;
- /*
- * If it is a disabled cipher we didn't send it in client hello, so
- * return an error.
- */
- if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
- goto f_err;
- }
-
- sk = ssl_get_ciphers_by_id(s);
- i = sk_SSL_CIPHER_find(sk, c);
- if (i < 0) {
- /* we did not say we would use this cipher */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
- goto f_err;
- }
-
- /*
- * Depending on the session caching (internal/external), the cipher
- * and/or cipher_id values may not be set. Make sure that cipher_id is
- * set and use it for comparison.
- */
- if (s->session->cipher)
- s->session->cipher_id = s->session->cipher->id;
- if (s->hit && (s->session->cipher_id != c->id)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
- goto f_err;
- }
- s->s3->tmp.new_cipher = c;
- /*
- * Don't digest cached records if no sigalgs: we may need them for client
- * authentication.
- */
- if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
- goto f_err;
- /* lets get the compression algorithm */
- /* COMPRESSION */
- if (!PACKET_get_1(pkt, &compression)) {
- SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-#ifdef OPENSSL_NO_COMP
- if (compression != 0) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
- goto f_err;
- }
- /*
- * If compression is disabled we'd better not try to resume a session
- * using compression.
- */
- if (s->session->compress_meth != 0) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
- goto f_err;
- }
-#else
- if (s->hit && compression != s->session->compress_meth) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
- goto f_err;
- }
- if (compression == 0)
- comp = NULL;
- else if (!ssl_allow_compression(s)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
- goto f_err;
- } else {
- comp = ssl3_comp_find(s->ctx->comp_methods, compression);
- }
-
- if (compression != 0 && comp == NULL) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
- goto f_err;
- } else {
- s->s3->tmp.new_compression = comp;
- }
-#endif
-
- /* TLS extensions */
- if (!ssl_parse_serverhello_tlsext(s, pkt)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
- goto err;
- }
-
- if (PACKET_remaining(pkt) != 0) {
- /* wrong packet length */
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
- goto f_err;
- }
-
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && s->hit) {
- unsigned char sctpauthkey[64];
- char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
-
- /*
- * Add new shared key for SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- snprintf((char *)labelbuffer,
- sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey),
- labelbuffer,
- sizeof(labelbuffer), NULL, 0,
- 0) <= 0)
- goto err;
-
- BIO_ctrl(SSL_get_wbio(s),
- BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
- }
-#endif
-
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
-{
- int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
- unsigned long cert_list_len, cert_len;
- X509 *x = NULL;
- unsigned char *certstart, *certbytes;
- STACK_OF(X509) *sk = NULL;
- EVP_PKEY *pkey = NULL;
-
- if ((sk = sk_X509_new_null()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (!PACKET_get_net_3(pkt, &cert_list_len)
- || PACKET_remaining(pkt) != cert_list_len) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- while (PACKET_remaining(pkt)) {
- if (!PACKET_get_net_3(pkt, &cert_len)
- || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
-
- certstart = certbytes;
- x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
- if (x == NULL) {
- al = SSL_AD_BAD_CERTIFICATE;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
- goto f_err;
- }
- if (certbytes != (certstart + cert_len)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
- if (!sk_X509_push(sk, x)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- x = NULL;
- }
-
- i = ssl_verify_cert_chain(s, sk);
- if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
- al = ssl_verify_alarm_type(s->verify_result);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_CERTIFICATE_VERIFY_FAILED);
- goto f_err;
- }
- ERR_clear_error(); /* but we keep s->verify_result */
- if (i > 1) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
- al = SSL_AD_HANDSHAKE_FAILURE;
- goto f_err;
- }
-
- s->session->peer_chain = sk;
- /*
- * Inconsistency alert: cert_chain does include the peer's certificate,
- * which we don't include in s3_srvr.c
- */
- x = sk_X509_value(sk, 0);
- sk = NULL;
- /*
- * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
- */
-
- pkey = X509_get_pubkey(x);
-
- if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
- x = NULL;
- al = SSL3_AL_FATAL;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
- goto f_err;
- }
-
- i = ssl_cert_type(x, pkey);
- if (i < 0) {
- x = NULL;
- al = SSL3_AL_FATAL;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_UNKNOWN_CERTIFICATE_TYPE);
- goto f_err;
- }
-
- exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
- if (exp_idx >= 0 && i != exp_idx) {
- x = NULL;
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_WRONG_CERTIFICATE_TYPE);
- goto f_err;
- }
- s->session->peer_type = i;
-
- X509_free(s->session->peer);
- X509_up_ref(x);
- s->session->peer = x;
- s->session->verify_result = s->verify_result;
-
- x = NULL;
- ret = MSG_PROCESS_CONTINUE_READING;
- goto done;
-
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- statem_set_error(s);
- done:
- EVP_PKEY_free(pkey);
- X509_free(x);
- sk_X509_pop_free(sk, X509_free);
- return ret;
-}
-
-enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
-{
-#ifndef OPENSSL_NO_RSA
- unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
-#endif
- EVP_MD_CTX md_ctx;
- int al, j, verify_ret;
- long alg_k, alg_a;
- EVP_PKEY *pkey = NULL;
- const EVP_MD *md = NULL;
-#ifndef OPENSSL_NO_RSA
- RSA *rsa = NULL;
-#endif
-#ifndef OPENSSL_NO_DH
- DH *dh = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- EC_KEY *ecdh = NULL;
- BN_CTX *bn_ctx = NULL;
- EC_POINT *srvr_ecpoint = NULL;
- int curve_nid = 0;
-#endif
- PACKET save_param_start, signature;
-
- EVP_MD_CTX_init(&md_ctx);
-
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- save_param_start = *pkt;
-
-#ifndef OPENSSL_NO_RSA
- RSA_free(s->s3->peer_rsa_tmp);
- s->s3->peer_rsa_tmp = NULL;
-#endif
-#ifndef OPENSSL_NO_DH
- DH_free(s->s3->peer_dh_tmp);
- s->s3->peer_dh_tmp = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- EC_KEY_free(s->s3->peer_ecdh_tmp);
- s->s3->peer_ecdh_tmp = NULL;
-#endif
-
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-
- al = SSL_AD_DECODE_ERROR;
-
-#ifndef OPENSSL_NO_PSK
- /* PSK ciphersuites are preceded by an identity hint */
- if (alg_k & SSL_PSK) {
- PACKET psk_identity_hint;
- if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- /*
- * Store PSK identity hint for later use, hint is used in
- * ssl3_send_client_key_exchange. Assume that the maximum length of
- * a PSK identity hint can be as long as the maximum length of a PSK
- * identity.
- */
- if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
- goto f_err;
- }
-
- if (!PACKET_strndup(&psk_identity_hint,
- &s->session->psk_identity_hint)) {
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
- }
-
- /* Nothing else to do for plain PSK or RSAPSK */
- if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
- } else
-#endif /* !OPENSSL_NO_PSK */
-#ifndef OPENSSL_NO_SRP
- if (alg_k & SSL_kSRP) {
- PACKET prime, generator, salt, server_pub;
- if (!PACKET_get_length_prefixed_2(pkt, &prime)
- || !PACKET_get_length_prefixed_2(pkt, &generator)
- || !PACKET_get_length_prefixed_1(pkt, &salt)
- || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- if ((s->srp_ctx.N =
- BN_bin2bn(PACKET_data(&prime),
- PACKET_remaining(&prime), NULL)) == NULL
- || (s->srp_ctx.g =
- BN_bin2bn(PACKET_data(&generator),
- PACKET_remaining(&generator), NULL)) == NULL
- || (s->srp_ctx.s =
- BN_bin2bn(PACKET_data(&salt),
- PACKET_remaining(&salt), NULL)) == NULL
- || (s->srp_ctx.B =
- BN_bin2bn(PACKET_data(&server_pub),
- PACKET_remaining(&server_pub), NULL)) == NULL) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
-
- if (!srp_verify_server_param(s, &al)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
- goto f_err;
- }
-
-/* We must check if there is a certificate */
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get_pubkey(s->session->peer);
- } else
-#endif /* !OPENSSL_NO_SRP */
-#ifndef OPENSSL_NO_RSA
- if (alg_k & SSL_kRSA) {
- PACKET mod, exp;
- /* Temporary RSA keys only allowed in export ciphersuites */
- if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
-
- if (!PACKET_get_length_prefixed_2(pkt, &mod)
- || !PACKET_get_length_prefixed_2(pkt, &exp)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- if ((rsa = RSA_new()) == NULL) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod),
- rsa->n)) == NULL
- || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp),
- rsa->e)) == NULL) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
-
- /* this should be because we are using an export cipher */
- if (alg_a & SSL_aRSA)
- pkey = X509_get_pubkey(s->session->peer);
- else {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
-
- s->s3->peer_rsa_tmp = rsa;
- rsa = NULL;
- }
-#else /* OPENSSL_NO_RSA */
- if (0) ;
-#endif
-#ifndef OPENSSL_NO_DH
- else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
- PACKET prime, generator, pub_key;
-
- if (!PACKET_get_length_prefixed_2(pkt, &prime)
- || !PACKET_get_length_prefixed_2(pkt, &generator)
- || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- if ((dh = DH_new()) == NULL) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
- goto err;
- }
-
- if ((dh->p = BN_bin2bn(PACKET_data(&prime),
- PACKET_remaining(&prime), NULL)) == NULL
- || (dh->g = BN_bin2bn(PACKET_data(&generator),
- PACKET_remaining(&generator), NULL)) == NULL
- || (dh->pub_key =
- BN_bin2bn(PACKET_data(&pub_key),
- PACKET_remaining(&pub_key), NULL)) == NULL) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
-
- if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
- goto f_err;
- }
-
- if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
- goto f_err;
- }
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get_pubkey(s->session->peer);
- /* else anonymous DH, so no certificate or pkey. */
-
- s->s3->peer_dh_tmp = dh;
- dh = NULL;
- }
-#endif /* !OPENSSL_NO_DH */
-
-#ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
- EC_GROUP *ngroup;
- const EC_GROUP *group;
- PACKET encoded_pt;
- unsigned char *ecparams;
-
- if ((ecdh = EC_KEY_new()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /*
- * Extract elliptic curve parameters and the server's ephemeral ECDH
- * public key. For now we only support named (not generic) curves and
- * ECParameters in this case is just three bytes.
- */
- if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- /*
- * Check curve is one of our preferences, if not server has sent an
- * invalid curve. ECParameters is 3 bytes.
- */
- if (!tls1_check_curve(s, ecparams, 3)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
- goto f_err;
- }
-
- if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
- SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
- goto f_err;
- }
-
- ngroup = EC_GROUP_new_by_curve_name(curve_nid);
- if (ngroup == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- if (EC_KEY_set_group(ecdh, ngroup) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- EC_GROUP_free(ngroup);
-
- group = EC_KEY_get0_group(ecdh);
-
- if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
- (EC_GROUP_get_degree(group) > 163)) {
- al = SSL_AD_EXPORT_RESTRICTION;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
- SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
- goto f_err;
- }
-
- /* Next, get the encoded ECPoint */
- if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
- ((bn_ctx = BN_CTX_new()) == NULL)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt),
- PACKET_remaining(&encoded_pt), bn_ctx) == 0) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
- goto f_err;
- }
-
- /*
- * The ECC/TLS specification does not mention the use of DSA to sign
- * ECParameters in the server key exchange message. We do support RSA
- * and ECDSA.
- */
- if (0) ;
-# ifndef OPENSSL_NO_RSA
- else if (alg_a & SSL_aRSA)
- pkey = X509_get_pubkey(s->session->peer);
-# endif
-# ifndef OPENSSL_NO_EC
- else if (alg_a & SSL_aECDSA)
- pkey = X509_get_pubkey(s->session->peer);
-# endif
- /* else anonymous ECDH, so no certificate or pkey. */
- EC_KEY_set_public_key(ecdh, srvr_ecpoint);
- s->s3->peer_ecdh_tmp = ecdh;
- ecdh = NULL;
- BN_CTX_free(bn_ctx);
- bn_ctx = NULL;
- EC_POINT_free(srvr_ecpoint);
- srvr_ecpoint = NULL;
- } else if (alg_k) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
-#endif /* !OPENSSL_NO_EC */
-
- /* if it was signed, check the signature */
- if (pkey != NULL) {
- PACKET params;
- /*
- * |pkt| now points to the beginning of the signature, so the difference
- * equals the length of the parameters.
- */
- if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
- PACKET_remaining(&save_param_start) -
- PACKET_remaining(pkt))) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
-
- if (SSL_USE_SIGALGS(s)) {
- unsigned char *sigalgs;
- int rv;
- if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
- if (rv == -1)
- goto err;
- else if (rv == 0) {
- goto f_err;
- }
-#ifdef SSL_DEBUG
- fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
-#endif
- } else {
- md = EVP_sha1();
- }
-
- if (!PACKET_get_length_prefixed_2(pkt, &signature)
- || PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- j = EVP_PKEY_size(pkey);
- if (j < 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
-
- /*
- * Check signature length
- */
- if (PACKET_remaining(&signature) > (size_t)j) {
- /* wrong packet length */
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
- goto f_err;
- }
-#ifndef OPENSSL_NO_RSA
- if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
- int num;
- unsigned int size;
-
- j = 0;
- q = md_buf;
- for (num = 2; num > 0; num--) {
- EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
- EVP_DigestInit_ex(&md_ctx, (num == 2)
- ? s->ctx->md5 : s->ctx->sha1, NULL);
- EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms),
- PACKET_remaining(¶ms));
- EVP_DigestFinal_ex(&md_ctx, q, &size);
- q += size;
- j += size;
- }
- verify_ret =
- RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature),
- PACKET_remaining(&signature), pkey->pkey.rsa);
- if (verify_ret < 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
- goto f_err;
- }
- if (verify_ret == 0) {
- /* bad signature */
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
- goto f_err;
- }
- } else
-#endif
- {
- EVP_VerifyInit_ex(&md_ctx, md, NULL);
- EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms),
- PACKET_remaining(¶ms));
- if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature),
- PACKET_remaining(&signature), pkey) <= 0) {
- /* bad signature */
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
- goto f_err;
- }
- }
- } else {
- /* aNULL, aSRP or PSK do not need public keys */
- if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
- /* Might be wrong key type, check it */
- if (ssl3_check_cert_and_algorithm(s))
- /* Otherwise this shouldn't happen */
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- /* still data left over */
- if (PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
- goto f_err;
- }
- }
- EVP_PKEY_free(pkey);
- EVP_MD_CTX_cleanup(&md_ctx);
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- EVP_PKEY_free(pkey);
-#ifndef OPENSSL_NO_RSA
- RSA_free(rsa);
-#endif
-#ifndef OPENSSL_NO_DH
- DH_free(dh);
-#endif
-#ifndef OPENSSL_NO_EC
- BN_CTX_free(bn_ctx);
- EC_POINT_free(srvr_ecpoint);
- EC_KEY_free(ecdh);
-#endif
- EVP_MD_CTX_cleanup(&md_ctx);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
-{
- int ret = MSG_PROCESS_ERROR;
- unsigned int list_len, ctype_num, i, name_len;
- X509_NAME *xn = NULL;
- unsigned char *data;
- unsigned char *namestart, *namebytes;
- STACK_OF(X509_NAME) *ca_sk = NULL;
-
- if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* get the certificate types */
- if (!PACKET_get_1(pkt, &ctype_num)
- || !PACKET_get_bytes(pkt, &data, ctype_num)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
- OPENSSL_free(s->cert->ctypes);
- s->cert->ctypes = NULL;
- if (ctype_num > SSL3_CT_NUMBER) {
- /* If we exceed static buffer copy all to cert structure */
- s->cert->ctypes = OPENSSL_malloc(ctype_num);
- if (s->cert->ctypes == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- memcpy(s->cert->ctypes, data, ctype_num);
- s->cert->ctype_num = (size_t)ctype_num;
- ctype_num = SSL3_CT_NUMBER;
- }
- for (i = 0; i < ctype_num; i++)
- s->s3->tmp.ctype[i] = data[i];
-
- if (SSL_USE_SIGALGS(s)) {
- if (!PACKET_get_net_2(pkt, &list_len)
- || !PACKET_get_bytes(pkt, &data, list_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_LENGTH_MISMATCH);
- goto err;
- }
-
- /* Clear certificate digests and validity flags */
- for (i = 0; i < SSL_PKEY_NUM; i++) {
- s->s3->tmp.md[i] = NULL;
- s->s3->tmp.valid_flags[i] = 0;
- }
- if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_SIGNATURE_ALGORITHMS_ERROR);
- goto err;
- }
- if (!tls1_process_sigalgs(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- }
-
- /* get the CA RDNs */
- if (!PACKET_get_net_2(pkt, &list_len)
- || PACKET_remaining(pkt) != list_len) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
-
- while (PACKET_remaining(pkt)) {
- if (!PACKET_get_net_2(pkt, &name_len)
- || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_LENGTH_MISMATCH);
- goto err;
- }
-
- namestart = namebytes;
-
- if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
- name_len)) == NULL) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
- goto err;
- }
-
- if (namebytes != (namestart + name_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_CA_DN_LENGTH_MISMATCH);
- goto err;
- }
- if (!sk_X509_NAME_push(ca_sk, xn)) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- }
-
- /* we should setup a certificate to return.... */
- s->s3->tmp.cert_req = 1;
- s->s3->tmp.ctype_num = ctype_num;
- sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
- s->s3->tmp.ca_names = ca_sk;
- ca_sk = NULL;
-
- ret = MSG_PROCESS_CONTINUE_READING;
- goto done;
- err:
- statem_set_error(s);
- done:
- sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
- return ret;
-}
-
-static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
-{
- return (X509_NAME_cmp(*a, *b));
-}
-
-enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
-{
- int al;
- unsigned int ticklen;
- unsigned long ticket_lifetime_hint;
-
- if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
- || !PACKET_get_net_2(pkt, &ticklen)
- || PACKET_remaining(pkt) != ticklen) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- /* Server is allowed to change its mind and send an empty ticket. */
- if (ticklen == 0)
- return 1;
-
- if (s->session->session_id_length > 0) {
- int i = s->session_ctx->session_cache_mode;
- SSL_SESSION *new_sess;
- /*
- * We reused an existing session, so we need to replace it with a new
- * one
- */
- if (i & SSL_SESS_CACHE_CLIENT) {
- /*
- * Remove the old session from the cache
- */
- if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
- if (s->session_ctx->remove_session_cb != NULL)
- s->session_ctx->remove_session_cb(s->session_ctx,
- s->session);
- } else {
- /* We carry on if this fails */
- SSL_CTX_remove_session(s->session_ctx, s->session);
- }
- }
-
- if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
-
- SSL_SESSION_free(s->session);
- s->session = new_sess;
- }
-
- OPENSSL_free(s->session->tlsext_tick);
- s->session->tlsext_ticklen = 0;
-
- s->session->tlsext_tick = OPENSSL_malloc(ticklen);
- if (!s->session->tlsext_tick) {
- SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
- s->session->tlsext_ticklen = ticklen;
- /*
- * There are two ways to detect a resumed ticket session. One is to set
- * an appropriate session ID and then the server must return a match in
- * ServerHello. This allows the normal client session ID matching to work
- * and we know much earlier that the ticket has been accepted. The
- * other way is to set zero length session ID when the ticket is
- * presented and rely on the handshake to determine session resumption.
- * We choose the former approach because this fits in with assumptions
- * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
- * SHA256 is disabled) hash of the ticket.
- */
- EVP_Digest(s->session->tlsext_tick, ticklen,
- s->session->session_id, &s->session->session_id_length,
- EVP_sha256(), NULL);
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
-{
- int al;
- unsigned long resplen;
- unsigned int type;
-
- if (!PACKET_get_1(pkt, &type)
- || type != TLSEXT_STATUSTYPE_ocsp) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
- goto f_err;
- }
- if (!PACKET_get_net_3(pkt, &resplen)
- || PACKET_remaining(pkt) != resplen) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- OPENSSL_free(s->tlsext_ocsp_resp);
- s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
- if (!s->tlsext_ocsp_resp) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
- if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- s->tlsext_ocsp_resplen = resplen;
- if (s->ctx->tlsext_status_cb) {
- int ret;
- ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- if (ret == 0) {
- al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
- goto f_err;
- }
- if (ret < 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
- }
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
-{
- if (PACKET_remaining(pkt) > 0) {
- /* should contain no data */
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
-
-#ifndef OPENSSL_NO_SRP
- if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
- if (SRP_Calc_A_param(s) <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- }
-#endif
-
-#ifndef OPENSSL_NO_SCTP
- /* Only applies to renegotiation */
- if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
- && s->renegotiate != 0)
- return MSG_PROCESS_CONTINUE_PROCESSING;
- else
-#endif
- return MSG_PROCESS_FINISHED_READING;
-}
-
-int tls_construct_client_key_exchange(SSL *s)
-{
- unsigned char *p;
- int n;
-#ifndef OPENSSL_NO_PSK
- size_t pskhdrlen = 0;
-#endif
- unsigned long alg_k;
-#ifndef OPENSSL_NO_RSA
- unsigned char *q;
- EVP_PKEY *pkey = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- EC_KEY *clnt_ecdh = NULL;
- const EC_POINT *srvr_ecpoint = NULL;
- EVP_PKEY *srvr_pub_pkey = NULL;
- unsigned char *encodedPoint = NULL;
- int encoded_pt_len = 0;
- BN_CTX *bn_ctx = NULL;
-#endif
- unsigned char *pms = NULL;
- size_t pmslen = 0;
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- p = ssl_handshake_start(s);
-
-
-#ifndef OPENSSL_NO_PSK
- if (alg_k & SSL_PSK) {
- int psk_err = 1;
- /*
- * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
- * \0-terminated identity. The last byte is for us for simulating
- * strnlen.
- */
- char identity[PSK_MAX_IDENTITY_LEN + 1];
- size_t identitylen;
- unsigned char psk[PSK_MAX_PSK_LEN];
- size_t psklen;
-
- if (s->psk_client_callback == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_NO_CLIENT_CB);
- goto err;
- }
-
- memset(identity, 0, sizeof(identity));
-
- psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
- identity, sizeof(identity) - 1,
- psk, sizeof(psk));
-
- if (psklen > PSK_MAX_PSK_LEN) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto psk_err;
- } else if (psklen == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_IDENTITY_NOT_FOUND);
- goto psk_err;
- }
-
- OPENSSL_free(s->s3->tmp.psk);
- s->s3->tmp.psk = BUF_memdup(psk, psklen);
- OPENSSL_cleanse(psk, psklen);
-
- if (s->s3->tmp.psk == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
-
- s->s3->tmp.psklen = psklen;
-
- identitylen = strlen(identity);
- if (identitylen > PSK_MAX_IDENTITY_LEN) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto psk_err;
- }
- OPENSSL_free(s->session->psk_identity);
- s->session->psk_identity = BUF_strdup(identity);
- if (s->session->psk_identity == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
-
- s2n(identitylen, p);
- memcpy(p, identity, identitylen);
- pskhdrlen = 2 + identitylen;
- p += identitylen;
- psk_err = 0;
-psk_err:
- OPENSSL_cleanse(identity, sizeof(identity));
- if (psk_err != 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- goto err;
- }
- }
- if (alg_k & SSL_kPSK) {
- n = 0;
- } else
-#endif
-
- /* Fool emacs indentation */
- if (0) {
- }
-#ifndef OPENSSL_NO_RSA
- else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
- RSA *rsa;
- pmslen = SSL_MAX_MASTER_KEY_LENGTH;
- pms = OPENSSL_malloc(pmslen);
- if (!pms)
- goto memerr;
-
- if (s->session->peer == NULL) {
- /*
- * We should always have a server certificate with SSL_kRSA.
- */
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (s->s3->peer_rsa_tmp != NULL)
- rsa = s->s3->peer_rsa_tmp;
- else {
- pkey = X509_get_pubkey(s->session->peer);
- if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
- || (pkey->pkey.rsa == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- EVP_PKEY_free(pkey);
- goto err;
- }
- rsa = pkey->pkey.rsa;
- EVP_PKEY_free(pkey);
- }
-
- pms[0] = s->client_version >> 8;
- pms[1] = s->client_version & 0xff;
- if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
- goto err;
-
- q = p;
- /* Fix buf for TLS and beyond */
- if (s->version > SSL3_VERSION)
- p += 2;
- n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
-# ifdef PKCS1_CHECK
- if (s->options & SSL_OP_PKCS1_CHECK_1)
- p[1]++;
- if (s->options & SSL_OP_PKCS1_CHECK_2)
- tmp_buf[0] = 0x70;
-# endif
- if (n <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_BAD_RSA_ENCRYPT);
- goto err;
- }
-
- /* Fix buf for TLS and beyond */
- if (s->version > SSL3_VERSION) {
- s2n(n, q);
- n += 2;
- }
- }
-#endif
-#ifndef OPENSSL_NO_DH
- else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
- DH *dh_srvr, *dh_clnt;
- if (s->s3->peer_dh_tmp != NULL)
- dh_srvr = s->s3->peer_dh_tmp;
- else {
- /* we get them from the cert */
- EVP_PKEY *spkey = NULL;
- dh_srvr = NULL;
- spkey = X509_get_pubkey(s->session->peer);
- if (spkey) {
- dh_srvr = EVP_PKEY_get1_DH(spkey);
- EVP_PKEY_free(spkey);
- }
- if (dh_srvr == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- }
- if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
- /* Use client certificate key */
- EVP_PKEY *clkey = s->cert->key->privatekey;
- dh_clnt = NULL;
- if (clkey)
- dh_clnt = EVP_PKEY_get1_DH(clkey);
- if (dh_clnt == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- } else {
- /* generate a new random key */
- if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
- goto err;
- }
- if (!DH_generate_key(dh_clnt)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
- DH_free(dh_clnt);
- goto err;
- }
- }
-
- pmslen = DH_size(dh_clnt);
- pms = OPENSSL_malloc(pmslen);
- if (!pms)
- goto memerr;
-
- /*
- * use the 'p' output buffer for the DH key, but make sure to
- * clear it out afterwards
- */
-
- n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
- if (s->s3->peer_dh_tmp == NULL)
- DH_free(dh_srvr);
-
- if (n <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
- DH_free(dh_clnt);
- goto err;
- }
- pmslen = n;
-
- if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
- n = 0;
- else {
- /* send off the data */
- n = BN_num_bytes(dh_clnt->pub_key);
- s2n(n, p);
- BN_bn2bin(dh_clnt->pub_key, p);
- n += 2;
- }
-
- DH_free(dh_clnt);
- }
-#endif
-
-#ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
- const EC_GROUP *srvr_group = NULL;
- EC_KEY *tkey;
- int ecdh_clnt_cert = 0;
- int field_size = 0;
- /*
- * Did we send out the client's ECDH share for use in premaster
- * computation as part of client certificate? If so, set
- * ecdh_clnt_cert to 1.
- */
- if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
- /*-
- * XXX: For now, we do not support client
- * authentication using ECDH certificates.
- * To add such support, one needs to add
- * code that checks for appropriate
- * conditions and sets ecdh_clnt_cert to 1.
- * For example, the cert have an ECC
- * key on the same curve as the server's
- * and the key should be authorized for
- * key agreement.
- *
- * One also needs to add code in ssl3_connect
- * to skip sending the certificate verify
- * message.
- *
- * if ((s->cert->key->privatekey != NULL) &&
- * (s->cert->key->privatekey->type ==
- * EVP_PKEY_EC) && ...)
- * ecdh_clnt_cert = 1;
- */
- }
-
- if (s->s3->peer_ecdh_tmp != NULL) {
- tkey = s->s3->peer_ecdh_tmp;
- } else {
- /* Get the Server Public Key from Cert */
- srvr_pub_pkey = X509_get_pubkey(s->session->peer);
- if ((srvr_pub_pkey == NULL)
- || (srvr_pub_pkey->type != EVP_PKEY_EC)
- || (srvr_pub_pkey->pkey.ec == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- tkey = srvr_pub_pkey->pkey.ec;
- }
-
- srvr_group = EC_KEY_get0_group(tkey);
- srvr_ecpoint = EC_KEY_get0_public_key(tkey);
-
- if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if ((clnt_ecdh = EC_KEY_new()) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- if (ecdh_clnt_cert) {
- /*
- * Reuse key info from our certificate We only need our
- * private key to perform the ECDH computation.
- */
- const BIGNUM *priv_key;
- tkey = s->cert->key->privatekey->pkey.ec;
- priv_key = EC_KEY_get0_private_key(tkey);
- if (priv_key == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- } else {
- /* Generate a new ECDH key pair */
- if (!(EC_KEY_generate_key(clnt_ecdh))) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_ECDH_LIB);
- goto err;
- }
- }
-
- /*
- * use the 'p' output buffer for the ECDH key, but make sure to
- * clear it out afterwards
- */
-
- field_size = EC_GROUP_get_degree(srvr_group);
- if (field_size <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
- pmslen = (field_size + 7) / 8;
- pms = OPENSSL_malloc(pmslen);
- if (!pms)
- goto memerr;
- n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
- if (n <= 0 || pmslen != (size_t)n) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
-
- if (ecdh_clnt_cert) {
- /* Send empty client key exch message */
- n = 0;
- } else {
- /*
- * First check the size of encoding and allocate memory
- * accordingly.
- */
- encoded_pt_len =
- EC_POINT_point2oct(srvr_group,
- EC_KEY_get0_public_key(clnt_ecdh),
- POINT_CONVERSION_UNCOMPRESSED,
- NULL, 0, NULL);
-
- encodedPoint = (unsigned char *)
- OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
- bn_ctx = BN_CTX_new();
- if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* Encode the public key */
- n = EC_POINT_point2oct(srvr_group,
- EC_KEY_get0_public_key(clnt_ecdh),
- POINT_CONVERSION_UNCOMPRESSED,
- encodedPoint, encoded_pt_len, bn_ctx);
-
- *p = n; /* length of encoded point */
- /* Encoded point will be copied here */
- p += 1;
- /* copy the point */
- memcpy(p, encodedPoint, n);
- /* increment n to account for length field */
- n += 1;
- }
-
- /* Free allocated memory */
- BN_CTX_free(bn_ctx);
- OPENSSL_free(encodedPoint);
- EC_KEY_free(clnt_ecdh);
- EVP_PKEY_free(srvr_pub_pkey);
- }
-#endif /* !OPENSSL_NO_EC */
- else if (alg_k & SSL_kGOST) {
- /* GOST key exchange message creation */
- EVP_PKEY_CTX *pkey_ctx;
- X509 *peer_cert;
- size_t msglen;
- unsigned int md_len;
- unsigned char shared_ukm[32], tmp[256];
- EVP_MD_CTX *ukm_hash;
- EVP_PKEY *pub_key;
-
- pmslen = 32;
- pms = OPENSSL_malloc(pmslen);
- if (!pms)
- goto memerr;
-
- /*
- * Get server sertificate PKEY and create ctx from it
- */
- peer_cert = s->session->peer;
- if (!peer_cert) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
- goto err;
- }
-
- pkey_ctx = EVP_PKEY_CTX_new(pub_key =
- X509_get_pubkey(peer_cert), NULL);
- /*
- * If we have send a certificate, and certificate key
- *
- * * parameters match those of server certificate, use
- * certificate key for key exchange
- */
-
- /* Otherwise, generate ephemeral key pair */
-
- EVP_PKEY_encrypt_init(pkey_ctx);
- /* Generate session key */
- if (RAND_bytes(pms, pmslen) <= 0) {
- EVP_PKEY_CTX_free(pkey_ctx);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- };
- /*
- * If we have client certificate, use its secret as peer key
- */
- if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
- if (EVP_PKEY_derive_set_peer
- (pkey_ctx, s->cert->key->privatekey) <= 0) {
- /*
- * If there was an error - just ignore it. Ephemeral key
- * * would be used
- */
- ERR_clear_error();
- }
- }
- /*
- * Compute shared IV and store it in algorithm-specific context
- * data
- */
- ukm_hash = EVP_MD_CTX_create();
- EVP_DigestInit(ukm_hash,
- EVP_get_digestbynid(NID_id_GostR3411_94));
- EVP_DigestUpdate(ukm_hash, s->s3->client_random,
- SSL3_RANDOM_SIZE);
- EVP_DigestUpdate(ukm_hash, s->s3->server_random,
- SSL3_RANDOM_SIZE);
- EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
- EVP_MD_CTX_destroy(ukm_hash);
- if (EVP_PKEY_CTX_ctrl
- (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
- shared_ukm) < 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_LIBRARY_BUG);
- goto err;
- }
- /* Make GOST keytransport blob message */
- /*
- * Encapsulate it into sequence
- */
- *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
- msglen = 255;
- if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_LIBRARY_BUG);
- goto err;
- }
- if (msglen >= 0x80) {
- *(p++) = 0x81;
- *(p++) = msglen & 0xff;
- n = msglen + 3;
- } else {
- *(p++) = msglen & 0xff;
- n = msglen + 2;
- }
- memcpy(p, tmp, msglen);
- /* Check if pubkey from client certificate was used */
- if (EVP_PKEY_CTX_ctrl
- (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
- /* Set flag "skip certificate verify" */
- s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
- }
- EVP_PKEY_CTX_free(pkey_ctx);
- EVP_PKEY_free(pub_key);
-
- }
-#ifndef OPENSSL_NO_SRP
- else if (alg_k & SSL_kSRP) {
- if (s->srp_ctx.A != NULL) {
- /* send off the data */
- n = BN_num_bytes(s->srp_ctx.A);
- s2n(n, p);
- BN_bn2bin(s->srp_ctx.A, p);
- n += 2;
- } else {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- OPENSSL_free(s->session->srp_username);
- s->session->srp_username = BUF_strdup(s->srp_ctx.login);
- if (s->session->srp_username == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- }
-#endif
- else {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
-#ifndef OPENSSL_NO_PSK
- n += pskhdrlen;
-#endif
-
- if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- s->s3->tmp.pms = pms;
- s->s3->tmp.pmslen = pmslen;
-
- return 1;
- memerr:
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- err:
- OPENSSL_clear_free(pms, pmslen);
- s->s3->tmp.pms = NULL;
-#ifndef OPENSSL_NO_EC
- BN_CTX_free(bn_ctx);
- OPENSSL_free(encodedPoint);
- EC_KEY_free(clnt_ecdh);
- EVP_PKEY_free(srvr_pub_pkey);
-#endif
-#ifndef OPENSSL_NO_PSK
- OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
- s->s3->tmp.psk = NULL;
-#endif
- statem_set_error(s);
- return 0;
-}
-
-int tls_client_key_exchange_post_work(SSL *s)
-{
- unsigned char *pms = NULL;
- size_t pmslen = 0;
-
-#ifndef OPENSSL_NO_SRP
- /* Check for SRP */
- if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
- if (!srp_generate_client_master_secret(s)) {
- SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- return 1;
- }
-#endif
- pms = s->s3->tmp.pms;
- pmslen = s->s3->tmp.pmslen;
-
- if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s)) {
- unsigned char sctpauthkey[64];
- char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
-
- /*
- * Add new shared key for SCTP-Auth, will be ignored if no SCTP
- * used.
- */
- snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0) <= 0)
- goto err;
-
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
- }
-#endif
-
- return 1;
- err:
- OPENSSL_clear_free(pms, pmslen);
- s->s3->tmp.pms = NULL;
- return 0;
-}
-
-int tls_construct_client_verify(SSL *s)
-{
- unsigned char *p;
- unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
- EVP_PKEY *pkey;
- EVP_PKEY_CTX *pctx = NULL;
- EVP_MD_CTX mctx;
- unsigned u = 0;
- unsigned long n;
- int j;
-
- EVP_MD_CTX_init(&mctx);
-
- p = ssl_handshake_start(s);
- pkey = s->cert->key->privatekey;
-/* Create context from key and test if sha1 is allowed as digest */
- pctx = EVP_PKEY_CTX_new(pkey, NULL);
- EVP_PKEY_sign_init(pctx);
- if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
- if (!SSL_USE_SIGALGS(s))
- s->method->ssl3_enc->cert_verify_mac(s,
- NID_sha1,
- &(data
- [MD5_DIGEST_LENGTH]));
- } else {
- ERR_clear_error();
- }
- /*
- * For TLS v1.2 send signature algorithm and signature using agreed
- * digest and cached handshake records.
- */
- if (SSL_USE_SIGALGS(s)) {
- long hdatalen = 0;
- void *hdata;
- const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
- hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
- if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- p += 2;
-#ifdef SSL_DEBUG
- fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
- EVP_MD_name(md));
-#endif
- if (!EVP_SignInit_ex(&mctx, md, NULL)
- || !EVP_SignUpdate(&mctx, hdata, hdatalen)
- || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
- goto err;
- }
- s2n(u, p);
- n = u + 4;
- /* Digest cached records and discard handshake buffer */
- if (!ssl3_digest_cached_records(s, 0))
- goto err;
- } else
-#ifndef OPENSSL_NO_RSA
- if (pkey->type == EVP_PKEY_RSA) {
- s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
- if (RSA_sign(NID_md5_sha1, data,
- MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
- &(p[2]), &u, pkey->pkey.rsa) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB);
- goto err;
- }
- s2n(u, p);
- n = u + 2;
- } else
-#endif
-#ifndef OPENSSL_NO_DSA
- if (pkey->type == EVP_PKEY_DSA) {
- if (!DSA_sign(pkey->save_type,
- &(data[MD5_DIGEST_LENGTH]),
- SHA_DIGEST_LENGTH, &(p[2]),
- (unsigned int *)&j, pkey->pkey.dsa)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB);
- goto err;
- }
- s2n(j, p);
- n = j + 2;
- } else
-#endif
-#ifndef OPENSSL_NO_EC
- if (pkey->type == EVP_PKEY_EC) {
- if (!ECDSA_sign(pkey->save_type,
- &(data[MD5_DIGEST_LENGTH]),
- SHA_DIGEST_LENGTH, &(p[2]),
- (unsigned int *)&j, pkey->pkey.ec)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
- goto err;
- }
- s2n(j, p);
- n = j + 2;
- } else
-#endif
- if (pkey->type == NID_id_GostR3410_2001) {
- unsigned char signbuf[64];
- int i;
- size_t sigsize = 64;
- s->method->ssl3_enc->cert_verify_mac(s,
- NID_id_GostR3411_94, data);
- if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- for (i = 63, j = 0; i >= 0; j++, i--) {
- p[2 + j] = signbuf[i];
- }
- s2n(j, p);
- n = j + 2;
- } else {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- EVP_MD_CTX_cleanup(&mctx);
- EVP_PKEY_CTX_free(pctx);
- return 1;
- err:
- EVP_MD_CTX_cleanup(&mctx);
- EVP_PKEY_CTX_free(pctx);
- return 0;
-}
-
-/*
- * Check a certificate can be used for client authentication. Currently check
- * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
- * certificates can be used and optionally checks suitability for Suite B.
- */
-static int ssl3_check_client_certificate(SSL *s)
-{
- unsigned long alg_k;
- if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
- return 0;
- /* If no suitable signature algorithm can't use certificate */
- if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
- return 0;
- /*
- * If strict mode check suitability of chain before using it. This also
- * adjusts suite B digest if necessary.
- */
- if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
- !tls1_check_chain(s, NULL, NULL, NULL, -2))
- return 0;
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- /* See if we can use client certificate for fixed DH */
- if (alg_k & (SSL_kDHr | SSL_kDHd)) {
- int i = s->session->peer_type;
- EVP_PKEY *clkey = NULL, *spkey = NULL;
- clkey = s->cert->key->privatekey;
- /* If client key not DH assume it can be used */
- if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
- return 1;
- if (i >= 0)
- spkey = X509_get_pubkey(s->session->peer);
- if (spkey) {
- /* Compare server and client parameters */
- i = EVP_PKEY_cmp_parameters(clkey, spkey);
- EVP_PKEY_free(spkey);
- if (i != 1)
- return 0;
- }
- s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
- }
- return 1;
-}
-
-enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst)
-{
- X509 *x509 = NULL;
- EVP_PKEY *pkey = NULL;
- int i;
-
- if (wst == WORK_MORE_A) {
- /* Let cert callback update client certificates if required */
- if (s->cert->cert_cb) {
- i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
- if (i < 0) {
- s->rwstate = SSL_X509_LOOKUP;
- return WORK_MORE_A;
- }
- if (i == 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
- s->rwstate = SSL_NOTHING;
- }
- if (ssl3_check_client_certificate(s))
- return WORK_FINISHED_CONTINUE;
-
- /* Fall through to WORK_MORE_B */
- wst = WORK_MORE_B;
- }
-
- /* We need to get a client cert */
- if (wst == WORK_MORE_B) {
- /*
- * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
- * return(-1); We then get retied later
- */
- i = ssl_do_client_cert_cb(s, &x509, &pkey);
- if (i < 0) {
- s->rwstate = SSL_X509_LOOKUP;
- return WORK_MORE_B;
- }
- s->rwstate = SSL_NOTHING;
- if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
- if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
- i = 0;
- } else if (i == 1) {
- i = 0;
- SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
- SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
- }
-
- X509_free(x509);
- EVP_PKEY_free(pkey);
- if (i && !ssl3_check_client_certificate(s))
- i = 0;
- if (i == 0) {
- if (s->version == SSL3_VERSION) {
- s->s3->tmp.cert_req = 0;
- ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
- return WORK_FINISHED_CONTINUE;
- } else {
- s->s3->tmp.cert_req = 2;
- if (!ssl3_digest_cached_records(s, 0)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
- }
- }
-
- return WORK_FINISHED_CONTINUE;
- }
-
- /* Shouldn't ever get here */
- return WORK_ERROR;
-}
-
-int tls_construct_client_certificate(SSL *s)
-{
- if (!ssl3_output_cert_chain(s,
- (s->s3->tmp.cert_req ==
- 2) ? NULL : s->cert->key)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- return 1;
-}
-
-#define has_bits(i,m) (((i)&(m)) == (m))
-
-int ssl3_check_cert_and_algorithm(SSL *s)
-{
- int i, idx;
- long alg_k, alg_a;
- EVP_PKEY *pkey = NULL;
- int pkey_bits;
-#ifndef OPENSSL_NO_RSA
- RSA *rsa;
-#endif
-#ifndef OPENSSL_NO_DH
- DH *dh;
-#endif
- int al = SSL_AD_HANDSHAKE_FAILURE;
-
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-
- /* we don't have a certificate */
- if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
- return (1);
-#ifndef OPENSSL_NO_RSA
- rsa = s->s3->peer_rsa_tmp;
-#endif
-#ifndef OPENSSL_NO_DH
- dh = s->s3->peer_dh_tmp;
-#endif
-
- /* This is the passed certificate */
-
- idx = s->session->peer_type;
-#ifndef OPENSSL_NO_EC
- if (idx == SSL_PKEY_ECC) {
- if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
- /* check failed */
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
- goto f_err;
- } else {
- return 1;
- }
- } else if (alg_a & SSL_aECDSA) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_ECDSA_SIGNING_CERT);
- goto f_err;
- } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
- goto f_err;
- }
-#endif
- pkey = X509_get_pubkey(s->session->peer);
- pkey_bits = EVP_PKEY_bits(pkey);
- i = X509_certificate_type(s->session->peer, pkey);
- EVP_PKEY_free(pkey);
-
- /* Check that we have a certificate if we require one */
- if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_RSA_SIGNING_CERT);
- goto f_err;
- }
-#ifndef OPENSSL_NO_DSA
- else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_DSA_SIGNING_CERT);
- goto f_err;
- }
-#endif
-#ifndef OPENSSL_NO_RSA
- if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
- if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
- !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_RSA_ENCRYPTING_CERT);
- goto f_err;
- } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
- if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
- if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_RSA_ENCRYPTING_CERT);
- goto f_err;
- }
- if (rsa != NULL) {
- /* server key exchange is not allowed. */
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- }
- }
- }
-#endif
-#ifndef OPENSSL_NO_DH
- if ((alg_k & SSL_kDHE) && (dh == NULL)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
- goto f_err;
- } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
- !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_DH_RSA_CERT);
- goto f_err;
- }
-# ifndef OPENSSL_NO_DSA
- else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
- !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_DH_DSA_CERT);
- goto f_err;
- }
-# endif
-#endif
-
- if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
- pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
-#ifndef OPENSSL_NO_RSA
- if (alg_k & SSL_kRSA) {
- if (rsa == NULL) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
- goto f_err;
- } else if (RSA_bits(rsa) >
- SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
- /* We have a temporary RSA key but it's too large. */
- al = SSL_AD_EXPORT_RESTRICTION;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
- goto f_err;
- }
- } else
-#endif
-#ifndef OPENSSL_NO_DH
- if (alg_k & SSL_kDHE) {
- if (DH_bits(dh) >
- SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
- /* We have a temporary DH key but it's too large. */
- al = SSL_AD_EXPORT_RESTRICTION;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_EXPORT_TMP_DH_KEY);
- goto f_err;
- }
- } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
- /* The cert should have had an export DH key. */
- al = SSL_AD_EXPORT_RESTRICTION;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_EXPORT_TMP_DH_KEY);
- goto f_err;
- } else
-#endif
- {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
- goto f_err;
- }
- }
- return (1);
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return (0);
-}
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_construct_next_proto(SSL *s)
-{
- unsigned int len, padding_len;
- unsigned char *d;
-
- len = s->next_proto_negotiated_len;
- padding_len = 32 - ((len + 2) % 32);
- d = (unsigned char *)s->init_buf->data;
- d[4] = len;
- memcpy(d + 5, s->next_proto_negotiated, len);
- d[5 + len] = padding_len;
- memset(d + 6 + len, 0, padding_len);
- *(d++) = SSL3_MT_NEXT_PROTO;
- l2n3(2 + len + padding_len, d);
- s->init_num = 4 + 2 + len + padding_len;
- s->init_off = 0;
-
- return 1;
-}
-#endif
-
-int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
-{
- int i = 0;
-#ifndef OPENSSL_NO_ENGINE
- if (s->ctx->client_cert_engine) {
- i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
- SSL_get_client_CA_list(s),
- px509, ppkey, NULL, NULL, NULL);
- if (i != 0)
- return i;
- }
-#endif
- if (s->ctx->client_cert_cb)
- i = s->ctx->client_cert_cb(s, px509, ppkey);
- return i;
-}
-
-int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p)
-{
- int i, j = 0;
- SSL_CIPHER *c;
- unsigned char *q;
- int empty_reneg_info_scsv = !s->renegotiate;
- /* Set disabled masks for this session */
- ssl_set_client_disabled(s);
-
- if (sk == NULL)
- return (0);
- q = p;
-
- for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
- c = sk_SSL_CIPHER_value(sk, i);
- /* Skip disabled ciphers */
- if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
- continue;
-#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
- if (c->id == SSL3_CK_SCSV) {
- if (!empty_reneg_info_scsv)
- continue;
- else
- empty_reneg_info_scsv = 0;
- }
-#endif
- j = s->method->put_cipher_by_char(c, p);
- p += j;
- }
- /*
- * If p == q, no ciphers; caller indicates an error. Otherwise, add
- * applicable SCSVs.
- */
- if (p != q) {
- if (empty_reneg_info_scsv) {
- static SSL_CIPHER scsv = {
- 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
-#ifdef OPENSSL_RI_DEBUG
- fprintf(stderr,
- "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
-#endif
- }
- if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
- static SSL_CIPHER scsv = {
- 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
- }
- }
-
- return (p - q);
-}
+++ /dev/null
-/* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- *
- * Portions of the attached software ("Contribution") are developed by
- * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
- *
- * The Contribution is licensed pursuant to the OpenSSL open source
- * license provided above.
- *
- * ECC cipher suite support in OpenSSL originally written by
- * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
- *
- */
-/* ====================================================================
- * Copyright 2005 Nokia. All rights reserved.
- *
- * The portions of the attached software ("Contribution") is developed by
- * Nokia Corporation and is licensed pursuant to the OpenSSL open source
- * license.
- *
- * The Contribution, originally written by Mika Kousa and Pasi Eronen of
- * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
- * support (see RFC 4279) to OpenSSL.
- *
- * No patent licenses or other rights except those expressly stated in
- * the OpenSSL open source license shall be deemed granted or received
- * expressly, by implication, estoppel, or otherwise.
- *
- * No assurances are provided by Nokia that the Contribution does not
- * infringe the patent or other intellectual property rights of any third
- * party or that the license provides you with all the necessary rights
- * to make use of the Contribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
- * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
- * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
- * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
- * OTHERWISE.
- */
-
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include "internal/constant_time_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/hmac.h>
-#include <openssl/x509.h>
-#ifndef OPENSSL_NO_DH
-# include <openssl/dh.h>
-#endif
-#include <openssl/bn.h>
-#include <openssl/md5.h>
-
-static STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,
- PACKET *cipher_suites,
- STACK_OF(SSL_CIPHER) **skp,
- int sslv2format, int *al);
-
-#ifndef OPENSSL_NO_SRP
-static int ssl_check_srp_ext_ClientHello(SSL *s, int *al)
-{
- int ret = SSL_ERROR_NONE;
-
- *al = SSL_AD_UNRECOGNIZED_NAME;
-
- if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) &&
- (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) {
- if (s->srp_ctx.login == NULL) {
- /*
- * RFC 5054 says SHOULD reject, we do so if There is no srp
- * login name
- */
- ret = SSL3_AL_FATAL;
- *al = SSL_AD_UNKNOWN_PSK_IDENTITY;
- } else {
- ret = SSL_srp_server_param_with_username(s, al);
- }
- }
- return ret;
-}
-#endif
-
-int tls_construct_hello_request(SSL *s)
-{
- if (!ssl_set_handshake_header(s, SSL3_MT_HELLO_REQUEST, 0)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_HELLO_REQUEST, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- return 1;
-}
-
-enum MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt)
-{
- int i, al = SSL_AD_INTERNAL_ERROR;
- unsigned int j, complen = 0;
- unsigned long id;
- SSL_CIPHER *c;
-#ifndef OPENSSL_NO_COMP
- SSL_COMP *comp = NULL;
-#endif
- STACK_OF(SSL_CIPHER) *ciphers = NULL;
- int protverr = 1;
- /* |cookie| will only be initialized for DTLS. */
- PACKET session_id, cipher_suites, compression, extensions, cookie;
- int is_v2_record;
-
- is_v2_record = RECORD_LAYER_is_sslv2_record(&s->rlayer);
-
- PACKET_null_init(&cookie);
- /* First lets get s->client_version set correctly */
- if (is_v2_record) {
- unsigned int version;
- unsigned int mt;
- /*-
- * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2
- * header is sent directly on the wire, not wrapped as a TLS
- * record. Our record layer just processes the message length and passes
- * the rest right through. Its format is:
- * Byte Content
- * 0-1 msg_length - decoded by the record layer
- * 2 msg_type - s->init_msg points here
- * 3-4 version
- * 5-6 cipher_spec_length
- * 7-8 session_id_length
- * 9-10 challenge_length
- * ... ...
- */
-
- if (!PACKET_get_1(pkt, &mt)
- || mt != SSL2_MT_CLIENT_HELLO) {
- /*
- * Should never happen. We should have tested this in the record
- * layer in order to have determined that this is a SSLv2 record
- * in the first place
- */
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (!PACKET_get_net_2(pkt, &version)) {
- /* No protocol version supplied! */
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
- goto err;
- }
- if (version == 0x0002) {
- /* This is real SSLv2. We don't support it. */
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
- goto err;
- } else if ((version & 0xff00) == (SSL3_VERSION_MAJOR << 8)) {
- /* SSLv3/TLS */
- s->client_version = version;
- } else {
- /* No idea what protocol this is */
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
- goto err;
- }
- } else {
- /*
- * use version from inside client hello, not from record header (may
- * differ: see RFC 2246, Appendix E, second paragraph)
- */
- if(!PACKET_get_net_2(pkt, (unsigned int *)&s->client_version)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- }
-
- /* Do SSL/TLS version negotiation if applicable */
- if (!SSL_IS_DTLS(s)) {
- if (s->version != TLS_ANY_VERSION) {
- if (s->client_version >= s->version) {
- protverr = 0;
- }
- } else if (s->client_version >= SSL3_VERSION) {
- switch(s->client_version) {
- default:
- case TLS1_2_VERSION:
- if(!(s->options & SSL_OP_NO_TLSv1_2)) {
- s->version = TLS1_2_VERSION;
- s->method = TLSv1_2_server_method();
- protverr = 0;
- break;
- }
- /* Deliberately fall through */
- case TLS1_1_VERSION:
- if(!(s->options & SSL_OP_NO_TLSv1_1)) {
- s->version = TLS1_1_VERSION;
- s->method = TLSv1_1_server_method();
- protverr = 0;
- break;
- }
- /* Deliberately fall through */
- case TLS1_VERSION:
- if(!(s->options & SSL_OP_NO_TLSv1)) {
- s->version = TLS1_VERSION;
- s->method = TLSv1_server_method();
- protverr = 0;
- break;
- }
- /* Deliberately fall through */
- case SSL3_VERSION:
-#ifndef OPENSSL_NO_SSL3
- if(!(s->options & SSL_OP_NO_SSLv3)) {
- s->version = SSL3_VERSION;
- s->method = SSLv3_server_method();
- protverr = 0;
- break;
- }
-#else
- break;
-#endif
- }
- }
- } else if (s->client_version <= s->version
- || s->method->version == DTLS_ANY_VERSION) {
- /*
- * For DTLS we just check versions are potentially compatible. Version
- * negotiation comes later.
- */
- protverr = 0;
- }
-
- if (protverr) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
- if ((!s->enc_write_ctx && !s->write_hash)) {
- /*
- * similar to ssl3_get_record, send alert using remote version
- * number
- */
- s->version = s->client_version;
- }
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
-
- /* Parse the message and load client random. */
- if (is_v2_record) {
- /*
- * Handle an SSLv2 backwards compatible ClientHello
- * Note, this is only for SSLv3+ using the backward compatible format.
- * Real SSLv2 is not supported, and is rejected above.
- */
- unsigned int cipher_len, session_id_len, challenge_len;
- PACKET challenge;
-
- if (!PACKET_get_net_2(pkt, &cipher_len)
- || !PACKET_get_net_2(pkt, &session_id_len)
- || !PACKET_get_net_2(pkt, &challenge_len)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
- SSL_R_RECORD_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-
- if (!PACKET_get_sub_packet(pkt, &cipher_suites, cipher_len)
- || !PACKET_get_sub_packet(pkt, &session_id, session_id_len)
- || !PACKET_get_sub_packet(pkt, &challenge, challenge_len)
- /* No extensions. */
- || PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_RECORD_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-
- /* Load the client random */
- challenge_len = challenge_len > SSL3_RANDOM_SIZE ? SSL3_RANDOM_SIZE :
- challenge_len;
- memset(s->s3->client_random, 0, SSL3_RANDOM_SIZE);
- if (!PACKET_copy_bytes(&challenge,
- s->s3->client_random + SSL3_RANDOM_SIZE -
- challenge_len, challenge_len)) {
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
-
- PACKET_null_init(&compression);
- PACKET_null_init(&extensions);
- } else {
- /* Regular ClientHello. */
- if (!PACKET_copy_bytes(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)
- || !PACKET_get_length_prefixed_1(pkt, &session_id)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- if (SSL_IS_DTLS(s)) {
- if (!PACKET_get_length_prefixed_1(pkt, &cookie)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- /*
- * If we require cookies and this ClientHello doesn't contain one,
- * just return since we do not want to allocate any memory yet.
- * So check cookie length...
- */
- if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
- if (PACKET_remaining(&cookie) == 0)
- return 1;
- }
- }
-
- if (!PACKET_get_length_prefixed_2(pkt, &cipher_suites)
- || !PACKET_get_length_prefixed_1(pkt, &compression)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- /* Could be empty. */
- extensions = *pkt;
- }
-
- s->hit = 0;
-
- /*
- * We don't allow resumption in a backwards compatible ClientHello.
- * TODO(openssl-team): in TLS1.1+, session_id MUST be empty.
- *
- * Versions before 0.9.7 always allow clients to resume sessions in
- * renegotiation. 0.9.7 and later allow this by default, but optionally
- * ignore resumption requests with flag
- * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather
- * than a change to default behavior so that applications relying on
- * this for security won't even compile against older library versions).
- * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to
- * request renegotiation but not a new session (s->new_session remains
- * unset): for servers, this essentially just means that the
- * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION setting will be
- * ignored.
- */
- if (is_v2_record ||
- (s->new_session &&
- (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) {
- if (!ssl_get_new_session(s, 1))
- goto err;
- } else {
- i = ssl_get_prev_session(s, &extensions, &session_id);
- /*
- * Only resume if the session's version matches the negotiated
- * version.
- * RFC 5246 does not provide much useful advice on resumption
- * with a different protocol version. It doesn't forbid it but
- * the sanity of such behaviour would be questionable.
- * In practice, clients do not accept a version mismatch and
- * will abort the handshake with an error.
- */
- if (i == 1 && s->version == s->session->ssl_version) {
- /* previous session */
- s->hit = 1;
- } else if (i == -1) {
- goto err;
- } else {
- /* i == 0 */
- if (!ssl_get_new_session(s, 1))
- goto err;
- }
- }
-
- if (SSL_IS_DTLS(s)) {
- /* Empty cookie was already handled above by returning early. */
- if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
- if (s->ctx->app_verify_cookie_cb != NULL) {
- if (s->ctx->app_verify_cookie_cb(s, PACKET_data(&cookie),
- PACKET_remaining(&cookie)) == 0) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
- SSL_R_COOKIE_MISMATCH);
- goto f_err;
- /* else cookie verification succeeded */
- }
- /* default verification */
- } else if (!PACKET_equal(&cookie, s->d1->cookie,
- s->d1->cookie_len)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
- goto f_err;
- }
- s->d1->cookie_verified = 1;
- }
- if (s->method->version == DTLS_ANY_VERSION) {
- /* Select version to use */
- if (s->client_version <= DTLS1_2_VERSION &&
- !(s->options & SSL_OP_NO_DTLSv1_2)) {
- s->version = DTLS1_2_VERSION;
- s->method = DTLSv1_2_server_method();
- } else if (tls1_suiteb(s)) {
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
- SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
- s->version = s->client_version;
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- } else if (s->client_version <= DTLS1_VERSION &&
- !(s->options & SSL_OP_NO_DTLSv1)) {
- s->version = DTLS1_VERSION;
- s->method = DTLSv1_server_method();
- } else {
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
- SSL_R_WRONG_VERSION_NUMBER);
- s->version = s->client_version;
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
- s->session->ssl_version = s->version;
- }
- }
-
- if (ssl_bytes_to_cipher_list(s, &cipher_suites, &(ciphers),
- is_v2_record, &al) == NULL) {
- goto f_err;
- }
-
- /* If it is a hit, check that the cipher is in the list */
- if (s->hit) {
- j = 0;
- id = s->session->cipher->id;
-
-#ifdef CIPHER_DEBUG
- fprintf(stderr, "client sent %d ciphers\n",
- sk_SSL_CIPHER_num(ciphers));
-#endif
- for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
- c = sk_SSL_CIPHER_value(ciphers, i);
-#ifdef CIPHER_DEBUG
- fprintf(stderr, "client [%2d of %2d]:%s\n",
- i, sk_SSL_CIPHER_num(ciphers), SSL_CIPHER_get_name(c));
-#endif
- if (c->id == id) {
- j = 1;
- break;
- }
- }
- if (j == 0) {
- /*
- * we need to have the cipher in the cipher list if we are asked
- * to reuse it
- */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
- SSL_R_REQUIRED_CIPHER_MISSING);
- goto f_err;
- }
- }
-
- complen = PACKET_remaining(&compression);
- for (j = 0; j < complen; j++) {
- if (PACKET_data(&compression)[j] == 0)
- break;
- }
-
- if (j >= complen) {
- /* no compress */
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_NO_COMPRESSION_SPECIFIED);
- goto f_err;
- }
-
- /* TLS extensions */
- if (s->version >= SSL3_VERSION) {
- if (!ssl_parse_clienthello_tlsext(s, &extensions)) {
- SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_PARSE_TLSEXT);
- goto err;
- }
- }
-
- /*
- * Check if we want to use external pre-shared secret for this handshake
- * for not reused session only. We need to generate server_random before
- * calling tls_session_secret_cb in order to allow SessionTicket
- * processing to use it in key derivation.
- */
- {
- unsigned char *pos;
- pos = s->s3->server_random;
- if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE) <= 0) {
- goto f_err;
- }
- }
-
- if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
- SSL_CIPHER *pref_cipher = NULL;
-
- s->session->master_key_length = sizeof(s->session->master_key);
- if (s->tls_session_secret_cb(s, s->session->master_key,
- &s->session->master_key_length, ciphers,
- &pref_cipher,
- s->tls_session_secret_cb_arg)) {
- s->hit = 1;
- s->session->ciphers = ciphers;
- s->session->verify_result = X509_V_OK;
-
- ciphers = NULL;
-
- /* check if some cipher was preferred by call back */
- pref_cipher =
- pref_cipher ? pref_cipher : ssl3_choose_cipher(s,
- s->
- session->ciphers,
- SSL_get_ciphers
- (s));
- if (pref_cipher == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_NO_SHARED_CIPHER);
- goto f_err;
- }
-
- s->session->cipher = pref_cipher;
- sk_SSL_CIPHER_free(s->cipher_list);
- s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
- sk_SSL_CIPHER_free(s->cipher_list_by_id);
- s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
- }
- }
-
- /*
- * Worst case, we will use the NULL compression, but if we have other
- * options, we will now look for them. We have complen-1 compression
- * algorithms from the client, starting at q.
- */
- s->s3->tmp.new_compression = NULL;
-#ifndef OPENSSL_NO_COMP
- /* This only happens if we have a cache hit */
- if (s->session->compress_meth != 0) {
- int m, comp_id = s->session->compress_meth;
- unsigned int k;
- /* Perform sanity checks on resumed compression algorithm */
- /* Can't disable compression */
- if (!ssl_allow_compression(s)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
- SSL_R_INCONSISTENT_COMPRESSION);
- goto f_err;
- }
- /* Look for resumed compression method */
- for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) {
- comp = sk_SSL_COMP_value(s->ctx->comp_methods, m);
- if (comp_id == comp->id) {
- s->s3->tmp.new_compression = comp;
- break;
- }
- }
- if (s->s3->tmp.new_compression == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
- SSL_R_INVALID_COMPRESSION_ALGORITHM);
- goto f_err;
- }
- /* Look for resumed method in compression list */
- for (k = 0; k < complen; k++) {
- if (PACKET_data(&compression)[k] == comp_id)
- break;
- }
- if (k >= complen) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
- SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING);
- goto f_err;
- }
- } else if (s->hit)
- comp = NULL;
- else if (ssl_allow_compression(s) && s->ctx->comp_methods) {
- /* See if we have a match */
- int m, nn, v, done = 0;
- unsigned int o;
-
- nn = sk_SSL_COMP_num(s->ctx->comp_methods);
- for (m = 0; m < nn; m++) {
- comp = sk_SSL_COMP_value(s->ctx->comp_methods, m);
- v = comp->id;
- for (o = 0; o < complen; o++) {
- if (v == PACKET_data(&compression)[o]) {
- done = 1;
- break;
- }
- }
- if (done)
- break;
- }
- if (done)
- s->s3->tmp.new_compression = comp;
- else
- comp = NULL;
- }
-#else
- /*
- * If compression is disabled we'd better not try to resume a session
- * using compression.
- */
- if (s->session->compress_meth != 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
- goto f_err;
- }
-#endif
-
- /*
- * Given s->session->ciphers and SSL_get_ciphers, we must pick a cipher
- */
-
- if (!s->hit) {
-#ifdef OPENSSL_NO_COMP
- s->session->compress_meth = 0;
-#else
- s->session->compress_meth = (comp == NULL) ? 0 : comp->id;
-#endif
- sk_SSL_CIPHER_free(s->session->ciphers);
- s->session->ciphers = ciphers;
- if (ciphers == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- ciphers = NULL;
- if (!tls1_set_server_sigalgs(s)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
- goto err;
- }
- }
-
- sk_SSL_CIPHER_free(ciphers);
- return MSG_PROCESS_CONTINUE_PROCESSING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- statem_set_error(s);
-
- sk_SSL_CIPHER_free(ciphers);
- return MSG_PROCESS_ERROR;
-
-}
-
-enum WORK_STATE tls_post_process_client_hello(SSL *s, enum WORK_STATE wst)
-{
- int al;
- SSL_CIPHER *cipher;
-
- if (wst == WORK_MORE_A) {
- if (!s->hit) {
- /* Let cert callback update server certificates if required */
- if (s->cert->cert_cb) {
- int rv = s->cert->cert_cb(s, s->cert->cert_cb_arg);
- if (rv == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_CERT_CB_ERROR);
- goto f_err;
- }
- if (rv < 0) {
- s->rwstate = SSL_X509_LOOKUP;
- return WORK_MORE_A;
- }
- s->rwstate = SSL_NOTHING;
- }
- cipher = ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
-
- if (cipher == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_NO_SHARED_CIPHER);
- goto f_err;
- }
- s->s3->tmp.new_cipher = cipher;
- /* check whether we should disable session resumption */
- if (s->not_resumable_session_cb != NULL)
- s->session->not_resumable = s->not_resumable_session_cb(s,
- ((cipher->algorithm_mkey & (SSL_kDHE | SSL_kECDHE)) != 0));
- if (s->session->not_resumable)
- /* do not send a session ticket */
- s->tlsext_ticket_expected = 0;
- } else {
- /* Session-id reuse */
- s->s3->tmp.new_cipher = s->session->cipher;
- }
-
- if (!SSL_USE_SIGALGS(s) || !(s->verify_mode & SSL_VERIFY_PEER)) {
- if (!ssl3_digest_cached_records(s, 0))
- goto f_err;
- }
-
- /*-
- * we now have the following setup.
- * client_random
- * cipher_list - our prefered list of ciphers
- * ciphers - the clients prefered list of ciphers
- * compression - basically ignored right now
- * ssl version is set - sslv3
- * s->session - The ssl session has been setup.
- * s->hit - session reuse flag
- * s->s3->tmp.new_cipher- the new cipher to use.
- */
-
- /* Handles TLS extensions that we couldn't check earlier */
- if (s->version >= SSL3_VERSION) {
- if (ssl_check_clienthello_tlsext_late(s) <= 0) {
- SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
- goto f_err;
- }
- }
-
- wst = WORK_MORE_B;
- }
-#ifndef OPENSSL_NO_SRP
- if (wst == WORK_MORE_B) {
- int ret;
- if ((ret = ssl_check_srp_ext_ClientHello(s, &al)) < 0) {
- /*
- * callback indicates further work to be done
- */
- s->rwstate = SSL_X509_LOOKUP;
- return WORK_MORE_B;
- }
- if (ret != SSL_ERROR_NONE) {
- /*
- * This is not really an error but the only means to for
- * a client to detect whether srp is supported.
- */
- if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY)
- SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO,
- SSL_R_CLIENTHELLO_TLSEXT);
- goto f_err;
- }
- }
-#endif
- s->renegotiate = 2;
-
- return WORK_FINISHED_STOP;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- return WORK_ERROR;
-}
-
-int tls_construct_server_hello(SSL *s)
-{
- unsigned char *buf;
- unsigned char *p, *d;
- int i, sl;
- int al = 0;
- unsigned long l;
-
- buf = (unsigned char *)s->init_buf->data;
-
- /* Do the message type and length last */
- d = p = ssl_handshake_start(s);
-
- *(p++) = s->version >> 8;
- *(p++) = s->version & 0xff;
-
- /*
- * Random stuff. Filling of the server_random takes place in
- * tls_process_client_hello()
- */
- memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
- p += SSL3_RANDOM_SIZE;
-
- /*-
- * There are several cases for the session ID to send
- * back in the server hello:
- * - For session reuse from the session cache,
- * we send back the old session ID.
- * - If stateless session reuse (using a session ticket)
- * is successful, we send back the client's "session ID"
- * (which doesn't actually identify the session).
- * - If it is a new session, we send back the new
- * session ID.
- * - However, if we want the new session to be single-use,
- * we send back a 0-length session ID.
- * s->hit is non-zero in either case of session reuse,
- * so the following won't overwrite an ID that we're supposed
- * to send back.
- */
- if (s->session->not_resumable ||
- (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)
- && !s->hit))
- s->session->session_id_length = 0;
-
- sl = s->session->session_id_length;
- if (sl > (int)sizeof(s->session->session_id)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
- *(p++) = sl;
- memcpy(p, s->session->session_id, sl);
- p += sl;
-
- /* put the cipher */
- i = ssl3_put_cipher_by_char(s->s3->tmp.new_cipher, p);
- p += i;
-
- /* put the compression method */
-#ifdef OPENSSL_NO_COMP
- *(p++) = 0;
-#else
- if (s->s3->tmp.new_compression == NULL)
- *(p++) = 0;
- else
- *(p++) = s->s3->tmp.new_compression->id;
-#endif
-
- if (ssl_prepare_serverhello_tlsext(s) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT);
- statem_set_error(s);
- return 0;
- }
- if ((p =
- ssl_add_serverhello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
- &al)) == NULL) {
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- /* do the header */
- l = (p - d);
- if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_HELLO, l)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- return 1;
-}
-
-int tls_construct_server_done(SSL *s)
-{
- if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_DONE, 0)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_DONE, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- if (!s->s3->tmp.cert_request) {
- if (!ssl3_digest_cached_records(s, 0)) {
- statem_set_error(s);
- }
- }
-
- return 1;
-}
-
-int tls_construct_server_key_exchange(SSL *s)
-{
-#ifndef OPENSSL_NO_RSA
- unsigned char *q;
- int j, num;
- RSA *rsa;
- unsigned char md_buf[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
- unsigned int u;
-#endif
-#ifndef OPENSSL_NO_DH
- DH *dh = NULL, *dhp;
-#endif
-#ifndef OPENSSL_NO_EC
- EC_KEY *ecdh = NULL, *ecdhp;
- unsigned char *encodedPoint = NULL;
- int encodedlen = 0;
- int curve_id = 0;
- BN_CTX *bn_ctx = NULL;
-#endif
- EVP_PKEY *pkey;
- const EVP_MD *md = NULL;
- unsigned char *p, *d;
- int al, i;
- unsigned long type;
- int n;
- CERT *cert;
- BIGNUM *r[4];
- int nr[4], kn;
- BUF_MEM *buf;
- EVP_MD_CTX md_ctx;
-
- EVP_MD_CTX_init(&md_ctx);
-
- type = s->s3->tmp.new_cipher->algorithm_mkey;
- cert = s->cert;
-
- buf = s->init_buf;
-
- r[0] = r[1] = r[2] = r[3] = NULL;
- n = 0;
-#ifndef OPENSSL_NO_PSK
- if (type & SSL_PSK) {
- /*
- * reserve size for record length and PSK identity hint
- */
- n += 2;
- if (s->cert->psk_identity_hint)
- n += strlen(s->cert->psk_identity_hint);
- }
- /* Plain PSK or RSAPSK nothing to do */
- if (type & (SSL_kPSK | SSL_kRSAPSK)) {
- } else
-#endif /* !OPENSSL_NO_PSK */
-#ifndef OPENSSL_NO_RSA
- if (type & SSL_kRSA) {
- rsa = cert->rsa_tmp;
- if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) {
- rsa = s->cert->rsa_tmp_cb(s,
- SSL_C_IS_EXPORT(s->s3->
- tmp.new_cipher),
- SSL_C_EXPORT_PKEYLENGTH(s->s3->
- tmp.new_cipher));
- if (rsa == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
- goto f_err;
- }
- RSA_up_ref(rsa);
- cert->rsa_tmp = rsa;
- }
- if (rsa == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_RSA_KEY);
- goto f_err;
- }
- r[0] = rsa->n;
- r[1] = rsa->e;
- s->s3->tmp.use_rsa_tmp = 1;
- } else
-#endif
-#ifndef OPENSSL_NO_DH
- if (type & (SSL_kDHE | SSL_kDHEPSK)) {
- if (s->cert->dh_tmp_auto) {
- dhp = ssl_get_auto_dh(s);
- if (dhp == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- } else
- dhp = cert->dh_tmp;
- if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
- dhp = s->cert->dh_tmp_cb(s,
- SSL_C_IS_EXPORT(s->s3->
- tmp.new_cipher),
- SSL_C_EXPORT_PKEYLENGTH(s->s3->
- tmp.new_cipher));
- if (dhp == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_DH_KEY);
- goto f_err;
- }
- if (!ssl_security(s, SSL_SECOP_TMP_DH,
- DH_security_bits(dhp), 0, dhp)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_DH_KEY_TOO_SMALL);
- goto f_err;
- }
- if (s->s3->tmp.dh != NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (s->cert->dh_tmp_auto)
- dh = dhp;
- else if ((dh = DHparams_dup(dhp)) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
- goto err;
- }
-
- s->s3->tmp.dh = dh;
- if ((dhp->pub_key == NULL ||
- dhp->priv_key == NULL ||
- (s->options & SSL_OP_SINGLE_DH_USE))) {
- if (!DH_generate_key(dh)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
- goto err;
- }
- } else {
- dh->pub_key = BN_dup(dhp->pub_key);
- dh->priv_key = BN_dup(dhp->priv_key);
- if ((dh->pub_key == NULL) || (dh->priv_key == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
- goto err;
- }
- }
- r[0] = dh->p;
- r[1] = dh->g;
- r[2] = dh->pub_key;
- } else
-#endif
-#ifndef OPENSSL_NO_EC
- if (type & (SSL_kECDHE | SSL_kECDHEPSK)) {
- const EC_GROUP *group;
-
- ecdhp = cert->ecdh_tmp;
- if (s->cert->ecdh_tmp_auto) {
- /* Get NID of appropriate shared curve */
- int nid = tls1_shared_curve(s, -2);
- if (nid != NID_undef)
- ecdhp = EC_KEY_new_by_curve_name(nid);
- } else if ((ecdhp == NULL) && s->cert->ecdh_tmp_cb) {
- ecdhp = s->cert->ecdh_tmp_cb(s,
- SSL_C_IS_EXPORT(s->s3->
- tmp.new_cipher),
- SSL_C_EXPORT_PKEYLENGTH(s->
- s3->tmp.new_cipher));
- }
- if (ecdhp == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_ECDH_KEY);
- goto f_err;
- }
-
- if (s->s3->tmp.ecdh != NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- /* Duplicate the ECDH structure. */
- if (ecdhp == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
- if (s->cert->ecdh_tmp_auto)
- ecdh = ecdhp;
- else if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
-
- s->s3->tmp.ecdh = ecdh;
- if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
- (EC_KEY_get0_private_key(ecdh) == NULL) ||
- (s->options & SSL_OP_SINGLE_ECDH_USE)) {
- if (!EC_KEY_generate_key(ecdh)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_ECDH_LIB);
- goto err;
- }
- }
-
- if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
- (EC_KEY_get0_public_key(ecdh) == NULL) ||
- (EC_KEY_get0_private_key(ecdh) == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
-
- if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
- (EC_GROUP_get_degree(group) > 163)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
- goto err;
- }
-
- /*
- * XXX: For now, we only support ephemeral ECDH keys over named
- * (not generic) curves. For supported named curves, curve_id is
- * non-zero.
- */
- if ((curve_id =
- tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
- == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
- goto err;
- }
-
- /*
- * Encode the public key. First check the size of encoding and
- * allocate memory accordingly.
- */
- encodedlen = EC_POINT_point2oct(group,
- EC_KEY_get0_public_key(ecdh),
- POINT_CONVERSION_UNCOMPRESSED,
- NULL, 0, NULL);
-
- encodedPoint = (unsigned char *)
- OPENSSL_malloc(encodedlen * sizeof(unsigned char));
- bn_ctx = BN_CTX_new();
- if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- encodedlen = EC_POINT_point2oct(group,
- EC_KEY_get0_public_key(ecdh),
- POINT_CONVERSION_UNCOMPRESSED,
- encodedPoint, encodedlen, bn_ctx);
-
- if (encodedlen == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
-
- BN_CTX_free(bn_ctx);
- bn_ctx = NULL;
-
- /*
- * XXX: For now, we only support named (not generic) curves in
- * ECDH ephemeral key exchanges. In this situation, we need four
- * additional bytes to encode the entire ServerECDHParams
- * structure.
- */
- n += 4 + encodedlen;
-
- /*
- * We'll generate the serverKeyExchange message explicitly so we
- * can set these to NULLs
- */
- r[0] = NULL;
- r[1] = NULL;
- r[2] = NULL;
- r[3] = NULL;
- } else
-#endif /* !OPENSSL_NO_EC */
-#ifndef OPENSSL_NO_SRP
- if (type & SSL_kSRP) {
- if ((s->srp_ctx.N == NULL) ||
- (s->srp_ctx.g == NULL) ||
- (s->srp_ctx.s == NULL) || (s->srp_ctx.B == NULL)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_MISSING_SRP_PARAM);
- goto err;
- }
- r[0] = s->srp_ctx.N;
- r[1] = s->srp_ctx.g;
- r[2] = s->srp_ctx.s;
- r[3] = s->srp_ctx.B;
- } else
-#endif
- {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
- goto f_err;
- }
- for (i = 0; i < 4 && r[i] != NULL; i++) {
- nr[i] = BN_num_bytes(r[i]);
-#ifndef OPENSSL_NO_SRP
- if ((i == 2) && (type & SSL_kSRP))
- n += 1 + nr[i];
- else
-#endif
- n += 2 + nr[i];
- }
-
- if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP))
- && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)) {
- if ((pkey = ssl_get_sign_pkey(s, s->s3->tmp.new_cipher, &md))
- == NULL) {
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- kn = EVP_PKEY_size(pkey);
- } else {
- pkey = NULL;
- kn = 0;
- }
-
- if (!BUF_MEM_grow_clean(buf, n + SSL_HM_HEADER_LENGTH(s) + kn)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_BUF);
- goto err;
- }
- d = p = ssl_handshake_start(s);
-
-#ifndef OPENSSL_NO_PSK
- if (type & SSL_PSK) {
- /* copy PSK identity hint */
- if (s->cert->psk_identity_hint) {
- s2n(strlen(s->cert->psk_identity_hint), p);
- strncpy((char *)p, s->cert->psk_identity_hint,
- strlen(s->cert->psk_identity_hint));
- p += strlen(s->cert->psk_identity_hint);
- } else {
- s2n(0, p);
- }
- }
-#endif
-
- for (i = 0; i < 4 && r[i] != NULL; i++) {
-#ifndef OPENSSL_NO_SRP
- if ((i == 2) && (type & SSL_kSRP)) {
- *p = nr[i];
- p++;
- } else
-#endif
- s2n(nr[i], p);
- BN_bn2bin(r[i], p);
- p += nr[i];
- }
-
-#ifndef OPENSSL_NO_EC
- if (type & (SSL_kECDHE | SSL_kECDHEPSK)) {
- /*
- * XXX: For now, we only support named (not generic) curves. In
- * this situation, the serverKeyExchange message has: [1 byte
- * CurveType], [2 byte CurveName] [1 byte length of encoded
- * point], followed by the actual encoded point itself
- */
- *p = NAMED_CURVE_TYPE;
- p += 1;
- *p = 0;
- p += 1;
- *p = curve_id;
- p += 1;
- *p = encodedlen;
- p += 1;
- memcpy(p, encodedPoint, encodedlen);
- OPENSSL_free(encodedPoint);
- encodedPoint = NULL;
- p += encodedlen;
- }
-#endif
-
- /* not anonymous */
- if (pkey != NULL) {
- /*
- * n is the length of the params, they start at &(d[4]) and p
- * points to the space at the end.
- */
-#ifndef OPENSSL_NO_RSA
- if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
- q = md_buf;
- j = 0;
- for (num = 2; num > 0; num--) {
- EVP_MD_CTX_set_flags(&md_ctx,
- EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
- EVP_DigestInit_ex(&md_ctx, (num == 2)
- ? s->ctx->md5 : s->ctx->sha1, NULL);
- EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_DigestUpdate(&md_ctx, d, n);
- EVP_DigestFinal_ex(&md_ctx, q, (unsigned int *)&i);
- q += i;
- j += i;
- }
- if (RSA_sign(NID_md5_sha1, md_buf, j,
- &(p[2]), &u, pkey->pkey.rsa) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_RSA);
- goto err;
- }
- s2n(u, p);
- n += u + 2;
- } else
-#endif
- if (md) {
- /* send signature algorithm */
- if (SSL_USE_SIGALGS(s)) {
- if (!tls12_get_sigandhash(p, pkey, md)) {
- /* Should never happen */
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- p += 2;
- }
-#ifdef SSL_DEBUG
- fprintf(stderr, "Using hash %s\n", EVP_MD_name(md));
-#endif
- EVP_SignInit_ex(&md_ctx, md, NULL);
- EVP_SignUpdate(&md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_SignUpdate(&md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE);
- EVP_SignUpdate(&md_ctx, d, n);
- if (!EVP_SignFinal(&md_ctx, &(p[2]),
- (unsigned int *)&i, pkey)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_EVP);
- goto err;
- }
- s2n(i, p);
- n += i + 2;
- if (SSL_USE_SIGALGS(s))
- n += 2;
- } else {
- /* Is this error check actually needed? */
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
- SSL_R_UNKNOWN_PKEY_TYPE);
- goto f_err;
- }
- }
-
- if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_KEY_EXCHANGE, n)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
-
- EVP_MD_CTX_cleanup(&md_ctx);
- return 1;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
-#ifndef OPENSSL_NO_EC
- OPENSSL_free(encodedPoint);
- BN_CTX_free(bn_ctx);
-#endif
- EVP_MD_CTX_cleanup(&md_ctx);
- statem_set_error(s);
- return 0;
-}
-
-int tls_construct_certificate_request(SSL *s)
-{
- unsigned char *p, *d;
- int i, j, nl, off, n;
- STACK_OF(X509_NAME) *sk = NULL;
- X509_NAME *name;
- BUF_MEM *buf;
-
- buf = s->init_buf;
-
- d = p = ssl_handshake_start(s);
-
- /* get the list of acceptable cert types */
- p++;
- n = ssl3_get_req_cert_type(s, p);
- d[0] = n;
- p += n;
- n++;
-
- if (SSL_USE_SIGALGS(s)) {
- const unsigned char *psigs;
- unsigned char *etmp = p;
- nl = tls12_get_psigalgs(s, &psigs);
- /* Skip over length for now */
- p += 2;
- nl = tls12_copy_sigalgs(s, p, psigs, nl);
- /* Now fill in length */
- s2n(nl, etmp);
- p += nl;
- n += nl + 2;
- }
-
- off = n;
- p += 2;
- n += 2;
-
- sk = SSL_get_client_CA_list(s);
- nl = 0;
- if (sk != NULL) {
- for (i = 0; i < sk_X509_NAME_num(sk); i++) {
- name = sk_X509_NAME_value(sk, i);
- j = i2d_X509_NAME(name, NULL);
- if (!BUF_MEM_grow_clean
- (buf, SSL_HM_HEADER_LENGTH(s) + n + j + 2)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST,
- ERR_R_BUF_LIB);
- goto err;
- }
- p = ssl_handshake_start(s) + n;
- s2n(j, p);
- i2d_X509_NAME(name, &p);
- n += 2 + j;
- nl += 2 + j;
- }
- }
- /* else no CA names */
- p = ssl_handshake_start(s) + off;
- s2n(nl, p);
-
- if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_REQUEST, n)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- s->s3->tmp.cert_request = 1;
-
- return 1;
- err:
- statem_set_error(s);
- return 0;
-}
-
-enum MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt)
-{
- int al;
- unsigned int i;
- unsigned long alg_k;
-#ifndef OPENSSL_NO_RSA
- RSA *rsa = NULL;
- EVP_PKEY *pkey = NULL;
-#endif
-#ifndef OPENSSL_NO_DH
- BIGNUM *pub = NULL;
- DH *dh_srvr, *dh_clnt = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- EC_KEY *srvr_ecdh = NULL;
- EVP_PKEY *clnt_pub_pkey = NULL;
- EC_POINT *clnt_ecpoint = NULL;
- BN_CTX *bn_ctx = NULL;
-#endif
- PACKET enc_premaster;
- unsigned char *data, *rsa_decrypt = NULL;
-
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
-#ifndef OPENSSL_NO_PSK
- /* For PSK parse and retrieve identity, obtain PSK key */
- if (alg_k & SSL_PSK) {
- unsigned char psk[PSK_MAX_PSK_LEN];
- size_t psklen;
- PACKET psk_identity;
-
- if (!PACKET_get_length_prefixed_2(pkt, &psk_identity)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- if (PACKET_remaining(&psk_identity) > PSK_MAX_IDENTITY_LEN) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_DATA_LENGTH_TOO_LONG);
- goto f_err;
- }
- if (s->psk_server_callback == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_NO_SERVER_CB);
- goto f_err;
- }
-
- if (!PACKET_strndup(&psk_identity, &s->session->psk_identity)) {
- SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
-
- psklen = s->psk_server_callback(s, s->session->psk_identity,
- psk, sizeof(psk));
-
- if (psklen > PSK_MAX_PSK_LEN) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- } else if (psklen == 0) {
- /*
- * PSK related to the given identity not found
- */
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_IDENTITY_NOT_FOUND);
- al = SSL_AD_UNKNOWN_PSK_IDENTITY;
- goto f_err;
- }
-
- OPENSSL_free(s->s3->tmp.psk);
- s->s3->tmp.psk = BUF_memdup(psk, psklen);
- OPENSSL_cleanse(psk, psklen);
-
- if (s->s3->tmp.psk == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
-
- s->s3->tmp.psklen = psklen;
- }
- if (alg_k & SSL_kPSK) {
- /* Identity extracted earlier: should be nothing left */
- if (PACKET_remaining(pkt) != 0) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- /* PSK handled by ssl_generate_master_secret */
- if (!ssl_generate_master_secret(s, NULL, 0, 0)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- } else
-#endif
-#ifndef OPENSSL_NO_RSA
- if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
- unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH];
- int decrypt_len;
- unsigned char decrypt_good, version_good;
- size_t j;
-
- /* FIX THIS UP EAY EAY EAY EAY */
- if (s->s3->tmp.use_rsa_tmp) {
- if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
- rsa = s->cert->rsa_tmp;
- /*
- * Don't do a callback because rsa_tmp should be sent already
- */
- if (rsa == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_RSA_PKEY);
- goto f_err;
-
- }
- } else {
- pkey = s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
- if ((pkey == NULL) ||
- (pkey->type != EVP_PKEY_RSA) || (pkey->pkey.rsa == NULL)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_RSA_CERTIFICATE);
- goto f_err;
- }
- rsa = pkey->pkey.rsa;
- }
-
- /* SSLv3 and pre-standard DTLS omit the length bytes. */
- if (s->version == SSL3_VERSION || s->version == DTLS1_BAD_VER) {
- enc_premaster = *pkt;
- } else {
- PACKET orig = *pkt;
- if (!PACKET_get_length_prefixed_2(pkt, &enc_premaster)
- || PACKET_remaining(pkt) != 0) {
- /* Try SSLv3 behaviour for TLS. */
- if (s->options & SSL_OP_TLS_D5_BUG) {
- enc_premaster = orig;
- } else {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- }
- }
-
- /*
- * We want to be sure that the plaintext buffer size makes it safe to
- * iterate over the entire size of a premaster secret
- * (SSL_MAX_MASTER_KEY_LENGTH). Reject overly short RSA keys because
- * their ciphertext cannot accommodate a premaster secret anyway.
- */
- if (RSA_size(rsa) < SSL_MAX_MASTER_KEY_LENGTH) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
- RSA_R_KEY_SIZE_TOO_SMALL);
- goto f_err;
- }
-
- rsa_decrypt = OPENSSL_malloc(RSA_size(rsa));
- if (rsa_decrypt == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
-
- /*
- * We must not leak whether a decryption failure occurs because of
- * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246,
- * section 7.4.7.1). The code follows that advice of the TLS RFC and
- * generates a random premaster secret for the case that the decrypt
- * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1
- */
-
- if (RAND_bytes(rand_premaster_secret,
- sizeof(rand_premaster_secret)) <= 0) {
- goto err;
- }
-
- decrypt_len = RSA_private_decrypt(PACKET_remaining(&enc_premaster),
- PACKET_data(&enc_premaster),
- rsa_decrypt, rsa, RSA_PKCS1_PADDING);
- ERR_clear_error();
-
- /*
- * decrypt_len should be SSL_MAX_MASTER_KEY_LENGTH. decrypt_good will
- * be 0xff if so and zero otherwise.
- */
- decrypt_good =
- constant_time_eq_int_8(decrypt_len, SSL_MAX_MASTER_KEY_LENGTH);
-
- /*
- * If the version in the decrypted pre-master secret is correct then
- * version_good will be 0xff, otherwise it'll be zero. The
- * Klima-Pokorny-Rosa extension of Bleichenbacher's attack
- * (http://eprint.iacr.org/2003/052/) exploits the version number
- * check as a "bad version oracle". Thus version checks are done in
- * constant time and are treated like any other decryption error.
- */
- version_good =
- constant_time_eq_8(rsa_decrypt[0],
- (unsigned)(s->client_version >> 8));
- version_good &=
- constant_time_eq_8(rsa_decrypt[1],
- (unsigned)(s->client_version & 0xff));
-
- /*
- * The premaster secret must contain the same version number as the
- * ClientHello to detect version rollback attacks (strangely, the
- * protocol does not offer such protection for DH ciphersuites).
- * However, buggy clients exist that send the negotiated protocol
- * version instead if the server does not support the requested
- * protocol version. If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such
- * clients.
- */
- if (s->options & SSL_OP_TLS_ROLLBACK_BUG) {
- unsigned char workaround_good;
- workaround_good =
- constant_time_eq_8(rsa_decrypt[0], (unsigned)(s->version >> 8));
- workaround_good &=
- constant_time_eq_8(rsa_decrypt[1],
- (unsigned)(s->version & 0xff));
- version_good |= workaround_good;
- }
-
- /*
- * Both decryption and version must be good for decrypt_good to
- * remain non-zero (0xff).
- */
- decrypt_good &= version_good;
-
- /*
- * Now copy rand_premaster_secret over from p using
- * decrypt_good_mask. If decryption failed, then p does not
- * contain valid plaintext, however, a check above guarantees
- * it is still sufficiently large to read from.
- */
- for (j = 0; j < sizeof(rand_premaster_secret); j++) {
- rsa_decrypt[j] =
- constant_time_select_8(decrypt_good, rsa_decrypt[j],
- rand_premaster_secret[j]);
- }
-
- if (!ssl_generate_master_secret(s, rsa_decrypt,
- sizeof(rand_premaster_secret), 0)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- OPENSSL_free(rsa_decrypt);
- rsa_decrypt = NULL;
- } else
-#endif
-#ifndef OPENSSL_NO_DH
- if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
- int idx = -1;
- EVP_PKEY *skey = NULL;
- PACKET bookmark = *pkt;
- unsigned char shared[(OPENSSL_DH_MAX_MODULUS_BITS + 7) / 8];
-
- if (!PACKET_get_net_2(pkt, &i)) {
- if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
- goto f_err;
- }
- i = 0;
- }
- if (PACKET_remaining(pkt) != i) {
- if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
- goto err;
- } else {
- *pkt = bookmark;
- i = PACKET_remaining(pkt);
- }
- }
- if (alg_k & SSL_kDHr)
- idx = SSL_PKEY_DH_RSA;
- else if (alg_k & SSL_kDHd)
- idx = SSL_PKEY_DH_DSA;
- if (idx >= 0) {
- skey = s->cert->pkeys[idx].privatekey;
- if ((skey == NULL) ||
- (skey->type != EVP_PKEY_DH) || (skey->pkey.dh == NULL)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_RSA_CERTIFICATE);
- goto f_err;
- }
- dh_srvr = skey->pkey.dh;
- } else if (s->s3->tmp.dh == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_DH_KEY);
- goto f_err;
- } else
- dh_srvr = s->s3->tmp.dh;
-
- if (PACKET_remaining(pkt) == 0L) {
- /* Get pubkey from cert */
- EVP_PKEY *clkey = X509_get_pubkey(s->session->peer);
- if (clkey) {
- if (EVP_PKEY_cmp_parameters(clkey, skey) == 1)
- dh_clnt = EVP_PKEY_get1_DH(clkey);
- }
- if (dh_clnt == NULL) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_DH_KEY);
- goto f_err;
- }
- EVP_PKEY_free(clkey);
- pub = dh_clnt->pub_key;
- } else {
- if (!PACKET_get_bytes(pkt, &data, i)) {
- /* We already checked we have enough data */
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- pub = BN_bin2bn(data, i, NULL);
- }
- if (pub == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_BN_LIB);
- goto err;
- }
-
- i = DH_compute_key(shared, pub, dh_srvr);
-
- if (i <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
- BN_clear_free(pub);
- goto err;
- }
-
- DH_free(s->s3->tmp.dh);
- s->s3->tmp.dh = NULL;
- if (dh_clnt)
- DH_free(dh_clnt);
- else
- BN_clear_free(pub);
- pub = NULL;
- if (!ssl_generate_master_secret(s, shared, i, 0)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- if (dh_clnt) {
- s->no_cert_verify = 1;
- return MSG_PROCESS_CONTINUE_PROCESSING;
- }
- } else
-#endif
-
-#ifndef OPENSSL_NO_EC
- if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
- int field_size = 0;
- const EC_KEY *tkey;
- const EC_GROUP *group;
- const BIGNUM *priv_key;
- unsigned char *shared;
-
- /* initialize structures for server's ECDH key pair */
- if ((srvr_ecdh = EC_KEY_new()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* Let's get server private key and group information */
- if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
- /* use the certificate */
- tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
- } else {
- /*
- * use the ephermeral values we saved when generating the
- * ServerKeyExchange msg.
- */
- tkey = s->s3->tmp.ecdh;
- }
-
- group = EC_KEY_get0_group(tkey);
- priv_key = EC_KEY_get0_private_key(tkey);
-
- if (!EC_KEY_set_group(srvr_ecdh, group) ||
- !EC_KEY_set_private_key(srvr_ecdh, priv_key)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
-
- /* Let's get client's public key */
- if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (PACKET_remaining(pkt) == 0L) {
- /* Client Publickey was in Client Certificate */
-
- if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_MISSING_TMP_ECDH_KEY);
- goto f_err;
- }
- if (((clnt_pub_pkey = X509_get_pubkey(s->session->peer))
- == NULL) || (clnt_pub_pkey->type != EVP_PKEY_EC)) {
- /*
- * XXX: For now, we do not support client authentication
- * using ECDH certificates so this branch (n == 0L) of the
- * code is never executed. When that support is added, we
- * ought to ensure the key received in the certificate is
- * authorized for key agreement. ECDH_compute_key implicitly
- * checks that the two ECDH shares are for the same group.
- */
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
- goto f_err;
- }
-
- if (EC_POINT_copy(clnt_ecpoint,
- EC_KEY_get0_public_key(clnt_pub_pkey->
- pkey.ec)) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- s->no_cert_verify = 1;
- } else {
- /*
- * Get client's public key from encoded point in the
- * ClientKeyExchange message.
- */
- if ((bn_ctx = BN_CTX_new()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* Get encoded point length */
- if (!PACKET_get_1(pkt, &i)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- if (!PACKET_get_bytes(pkt, &data, i)
- || PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- if (EC_POINT_oct2point(group, clnt_ecpoint, data, i, bn_ctx) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- }
-
- /* Compute the shared pre-master secret */
- field_size = EC_GROUP_get_degree(group);
- if (field_size <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- goto err;
- }
- shared = OPENSSL_malloc((field_size + 7) / 8);
- if (shared == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- i = ECDH_compute_key(shared, (field_size + 7) / 8, clnt_ecpoint,
- srvr_ecdh, NULL);
- if (i <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
- OPENSSL_free(shared);
- goto err;
- }
-
- EVP_PKEY_free(clnt_pub_pkey);
- EC_POINT_free(clnt_ecpoint);
- EC_KEY_free(srvr_ecdh);
- BN_CTX_free(bn_ctx);
- EC_KEY_free(s->s3->tmp.ecdh);
- s->s3->tmp.ecdh = NULL;
-
- if (!ssl_generate_master_secret(s, shared, i, 1)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- return MSG_PROCESS_CONTINUE_PROCESSING;
- } else
-#endif
-#ifndef OPENSSL_NO_SRP
- if (alg_k & SSL_kSRP) {
- if (!PACKET_get_net_2(pkt, &i)
- || !PACKET_get_bytes(pkt, &data, i)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_BAD_SRP_A_LENGTH);
- goto f_err;
- }
- if ((s->srp_ctx.A = BN_bin2bn(data, i, NULL)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
- if (BN_ucmp(s->srp_ctx.A, s->srp_ctx.N) >= 0
- || BN_is_zero(s->srp_ctx.A)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_BAD_SRP_PARAMETERS);
- goto f_err;
- }
- OPENSSL_free(s->session->srp_username);
- s->session->srp_username = BUF_strdup(s->srp_ctx.login);
- if (s->session->srp_username == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (!srp_generate_server_master_secret(s)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- } else
-#endif /* OPENSSL_NO_SRP */
- if (alg_k & SSL_kGOST) {
- EVP_PKEY_CTX *pkey_ctx;
- EVP_PKEY *client_pub_pkey = NULL, *pk = NULL;
- unsigned char premaster_secret[32], *start;
- size_t outlen = 32, inlen;
- unsigned long alg_a;
- int Ttag, Tclass;
- long Tlen;
- long sess_key_len;
-
- /* Get our certificate private key */
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- if (alg_a & SSL_aGOST01)
- pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey;
-
- pkey_ctx = EVP_PKEY_CTX_new(pk, NULL);
- EVP_PKEY_decrypt_init(pkey_ctx);
- /*
- * If client certificate is present and is of the same type, maybe
- * use it for key exchange. Don't mind errors from
- * EVP_PKEY_derive_set_peer, because it is completely valid to use a
- * client certificate for authorization only.
- */
- client_pub_pkey = X509_get_pubkey(s->session->peer);
- if (client_pub_pkey) {
- if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0)
- ERR_clear_error();
- }
- /* Decrypt session key */
- sess_key_len = PACKET_remaining(pkt);
- if (!PACKET_get_bytes(pkt, &data, sess_key_len)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- if (ASN1_get_object ((const unsigned char **)&data, &Tlen, &Ttag,
- &Tclass, sess_key_len) != V_ASN1_CONSTRUCTED
- || Ttag != V_ASN1_SEQUENCE
- || Tclass != V_ASN1_UNIVERSAL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_DECRYPTION_FAILED);
- goto gerr;
- }
- start = data;
- inlen = Tlen;
- if (EVP_PKEY_decrypt
- (pkey_ctx, premaster_secret, &outlen, start, inlen) <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
- SSL_R_DECRYPTION_FAILED);
- goto gerr;
- }
- /* Generate master secret */
- if (!ssl_generate_master_secret(s, premaster_secret,
- sizeof(premaster_secret), 0)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- /* Check if pubkey from client certificate was used */
- if (EVP_PKEY_CTX_ctrl
- (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
- s->no_cert_verify = 1;
-
- EVP_PKEY_free(client_pub_pkey);
- EVP_PKEY_CTX_free(pkey_ctx);
- return MSG_PROCESS_CONTINUE_PROCESSING;
- gerr:
- EVP_PKEY_free(client_pub_pkey);
- EVP_PKEY_CTX_free(pkey_ctx);
- goto err;
- } else {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_UNKNOWN_CIPHER_TYPE);
- goto f_err;
- }
-
- return MSG_PROCESS_CONTINUE_PROCESSING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
-#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_SRP)
- err:
-#endif
-#ifndef OPENSSL_NO_EC
- EVP_PKEY_free(clnt_pub_pkey);
- EC_POINT_free(clnt_ecpoint);
- EC_KEY_free(srvr_ecdh);
- BN_CTX_free(bn_ctx);
- OPENSSL_free(rsa_decrypt);
-#endif
-#ifndef OPENSSL_NO_PSK
- OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
- s->s3->tmp.psk = NULL;
-#endif
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-
-enum WORK_STATE tls_post_process_client_key_exchange(SSL *s,
- enum WORK_STATE wst)
-{
-#ifndef OPENSSL_NO_SCTP
- if (wst == WORK_MORE_A) {
- if (SSL_IS_DTLS(s)) {
- unsigned char sctpauthkey[64];
- char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
- /*
- * Add new shared key for SCTP-Auth, will be ignored if no SCTP
- * used.
- */
- snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0) <= 0) {
- statem_set_error(s);
- return WORK_ERROR;;
- }
-
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
- }
- wst = WORK_MORE_B;
- }
-
- if ((wst == WORK_MORE_B)
- /* Is this SCTP? */
- && BIO_dgram_is_sctp(SSL_get_wbio(s))
- /* Are we renegotiating? */
- && s->renegotiate
- /* Are we going to skip the CertificateVerify? */
- && (s->session->peer == NULL || s->no_cert_verify)
- && BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- statem_set_sctp_read_sock(s, 1);
- return WORK_MORE_B;
- } else {
- statem_set_sctp_read_sock(s, 0);
- }
-#endif
-
- if (s->no_cert_verify) {
- /* No certificate verify so we no longer need the handshake_buffer */
- BIO_free(s->s3->handshake_buffer);
- return WORK_FINISHED_CONTINUE;
- } else if (SSL_USE_SIGALGS(s)) {
- if (!s->session->peer) {
- /* No peer certificate so we no longer need the handshake_buffer */
- BIO_free(s->s3->handshake_buffer);
- return WORK_FINISHED_CONTINUE;
- }
- if (!s->s3->handshake_buffer) {
- SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return WORK_ERROR;
- }
- /*
- * For sigalgs freeze the handshake buffer. If we support
- * extms we've done this already so this is a no-op
- */
- if (!ssl3_digest_cached_records(s, 1)) {
- statem_set_error(s);
- return WORK_ERROR;
- }
- } else {
- int offset = 0;
- int dgst_num;
-
- /*
- * We need to get hashes here so if there is a client cert,
- * it can be verified FIXME - digest processing for
- * CertificateVerify should be generalized. But it is next
- * step
- */
- if (!ssl3_digest_cached_records(s, 0)) {
- statem_set_error(s);
- return WORK_ERROR;
- }
- for (dgst_num = 0; dgst_num < SSL_MAX_DIGEST; dgst_num++) {
- if (s->s3->handshake_dgst[dgst_num]) {
- int dgst_size;
-
- s->method->ssl3_enc->cert_verify_mac(s,
- EVP_MD_CTX_type
- (s->
- s3->handshake_dgst
- [dgst_num]),
- &(s->s3->
- tmp.cert_verify_md
- [offset]));
- dgst_size =
- EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]);
- if (dgst_size < 0) {
- statem_set_error(s);
- return WORK_ERROR;
- }
- offset += dgst_size;
- }
- }
- }
-
- return WORK_FINISHED_CONTINUE;
-}
-
-enum MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
-{
- EVP_PKEY *pkey = NULL;
- unsigned char *sig, *data;
- int al, ret = MSG_PROCESS_ERROR;
- int type = 0, i, j;
- unsigned int len;
- X509 *peer;
- const EVP_MD *md = NULL;
- EVP_MD_CTX mctx;
- EVP_MD_CTX_init(&mctx);
-
- peer = s->session->peer;
- pkey = X509_get_pubkey(peer);
- type = X509_certificate_type(peer, pkey);
-
- if (!(type & EVP_PKT_SIGN)) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY,
- SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
- al = SSL_AD_ILLEGAL_PARAMETER;
- goto f_err;
- }
-
- /* Check for broken implementations of GOST ciphersuites */
- /*
- * If key is GOST and n is exactly 64, it is bare signature without
- * length field
- */
- if (PACKET_remaining(pkt) == 64 && pkey->type == NID_id_GostR3410_2001) {
- len = 64;
- } else {
- if (SSL_USE_SIGALGS(s)) {
- int rv;
-
- if (!PACKET_get_bytes(pkt, &sig, 2)) {
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- rv = tls12_check_peer_sigalg(&md, s, sig, pkey);
- if (rv == -1) {
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- } else if (rv == 0) {
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-#ifdef SSL_DEBUG
- fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
-#endif
- }
- if (!PACKET_get_net_2(pkt, &len)) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- }
- j = EVP_PKEY_size(pkey);
- if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)
- || (PACKET_remaining(pkt) == 0)) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_WRONG_SIGNATURE_SIZE);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- if (!PACKET_get_bytes(pkt, &data, len)) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
-
- if (SSL_USE_SIGALGS(s)) {
- long hdatalen = 0;
- void *hdata;
- hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
- if (hdatalen <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
-#ifdef SSL_DEBUG
- fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n",
- EVP_MD_name(md));
-#endif
- if (!EVP_VerifyInit_ex(&mctx, md, NULL)
- || !EVP_VerifyUpdate(&mctx, hdata, hdatalen)) {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
-
- if (EVP_VerifyFinal(&mctx, data, len, pkey) <= 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);
- goto f_err;
- }
- } else
-#ifndef OPENSSL_NO_RSA
- if (pkey->type == EVP_PKEY_RSA) {
- i = RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
- MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, data, len,
- pkey->pkey.rsa);
- if (i < 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_RSA_DECRYPT);
- goto f_err;
- }
- if (i == 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_RSA_SIGNATURE);
- goto f_err;
- }
- } else
-#endif
-#ifndef OPENSSL_NO_DSA
- if (pkey->type == EVP_PKEY_DSA) {
- j = DSA_verify(pkey->save_type,
- &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
- SHA_DIGEST_LENGTH, data, len, pkey->pkey.dsa);
- if (j <= 0) {
- /* bad signature */
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_DSA_SIGNATURE);
- goto f_err;
- }
- } else
-#endif
-#ifndef OPENSSL_NO_EC
- if (pkey->type == EVP_PKEY_EC) {
- j = ECDSA_verify(pkey->save_type,
- &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
- SHA_DIGEST_LENGTH, data, len, pkey->pkey.ec);
- if (j <= 0) {
- /* bad signature */
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_ECDSA_SIGNATURE);
- goto f_err;
- }
- } else
-#endif
- if (pkey->type == NID_id_GostR3410_2001) {
- unsigned char signature[64];
- int idx;
- EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey, NULL);
- EVP_PKEY_verify_init(pctx);
- if (len != 64) {
- fprintf(stderr, "GOST signature length is %d", len);
- }
- for (idx = 0; idx < 64; idx++) {
- signature[63 - idx] = data[idx];
- }
- j = EVP_PKEY_verify(pctx, signature, 64, s->s3->tmp.cert_verify_md,
- 32);
- EVP_PKEY_CTX_free(pctx);
- if (j <= 0) {
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_ECDSA_SIGNATURE);
- goto f_err;
- }
- } else {
- SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_UNSUPPORTED_CERTIFICATE;
- goto f_err;
- }
-
- ret = MSG_PROCESS_CONTINUE_PROCESSING;
- if (0) {
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- }
- BIO_free(s->s3->handshake_buffer);
- s->s3->handshake_buffer = NULL;
- EVP_MD_CTX_cleanup(&mctx);
- EVP_PKEY_free(pkey);
- return ret;
-}
-
-enum MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt)
-{
- int i, al, ret = MSG_PROCESS_ERROR;
- X509 *x = NULL;
- unsigned long l, llen;
- const unsigned char *certstart;
- unsigned char *certbytes;
- STACK_OF(X509) *sk = NULL;
- PACKET spkt;
-
- if ((sk = sk_X509_new_null()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
-
- if (!PACKET_get_net_3(pkt, &llen)
- || !PACKET_get_sub_packet(pkt, &spkt, llen)
- || PACKET_remaining(pkt) != 0) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
-
- while (PACKET_remaining(&spkt) > 0) {
- if (!PACKET_get_net_3(&spkt, &l)
- || !PACKET_get_bytes(&spkt, &certbytes, l)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
-
- certstart = certbytes;
- x = d2i_X509(NULL, (const unsigned char **)&certbytes, l);
- if (x == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_ASN1_LIB);
- goto f_err;
- }
- if (certbytes != (certstart + l)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
- if (!sk_X509_push(sk, x)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
- x = NULL;
- }
-
- if (sk_X509_num(sk) <= 0) {
- /* TLS does not mind 0 certs returned */
- if (s->version == SSL3_VERSION) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_NO_CERTIFICATES_RETURNED);
- goto f_err;
- }
- /* Fail for TLS only if we required a certificate */
- else if ((s->verify_mode & SSL_VERIFY_PEER) &&
- (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
- al = SSL_AD_HANDSHAKE_FAILURE;
- goto f_err;
- }
- /* No client certificate so digest cached records */
- if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s, 0)) {
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
- } else {
- EVP_PKEY *pkey;
- i = ssl_verify_cert_chain(s, sk);
- if (i <= 0) {
- al = ssl_verify_alarm_type(s->verify_result);
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_CERTIFICATE_VERIFY_FAILED);
- goto f_err;
- }
- if (i > 1) {
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, i);
- al = SSL_AD_HANDSHAKE_FAILURE;
- goto f_err;
- }
- pkey = X509_get_pubkey(sk_X509_value(sk, 0));
- if (pkey == NULL) {
- al = SSL3_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
- SSL_R_UNKNOWN_CERTIFICATE_TYPE);
- goto f_err;
- }
- EVP_PKEY_free(pkey);
- }
-
- X509_free(s->session->peer);
- s->session->peer = sk_X509_shift(sk);
- s->session->verify_result = s->verify_result;
-
- sk_X509_pop_free(s->session->peer_chain, X509_free);
- s->session->peer_chain = sk;
- /*
- * Inconsistency alert: cert_chain does *not* include the peer's own
- * certificate, while we do include it in s3_clnt.c
- */
- sk = NULL;
- ret = MSG_PROCESS_CONTINUE_READING;
- goto done;
-
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- statem_set_error(s);
- done:
- X509_free(x);
- sk_X509_pop_free(sk, X509_free);
- return ret;
-}
-
-int tls_construct_server_certificate(SSL *s)
-{
- CERT_PKEY *cpk;
-
- cpk = ssl_get_server_send_pkey(s);
- if (cpk == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- if (!ssl3_output_cert_chain(s, cpk)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return 0;
- }
-
- return 1;
-}
-
-int tls_construct_new_session_ticket(SSL *s)
-{
- unsigned char *senc = NULL;
- EVP_CIPHER_CTX ctx;
- HMAC_CTX hctx;
- unsigned char *p, *macstart;
- const unsigned char *const_p;
- int len, slen_full, slen;
- SSL_SESSION *sess;
- unsigned int hlen;
- SSL_CTX *tctx = s->initial_ctx;
- unsigned char iv[EVP_MAX_IV_LENGTH];
- unsigned char key_name[16];
-
- /* get session encoding length */
- slen_full = i2d_SSL_SESSION(s->session, NULL);
- /*
- * Some length values are 16 bits, so forget it if session is too
- * long
- */
- if (slen_full == 0 || slen_full > 0xFF00) {
- statem_set_error(s);
- return 0;
- }
- senc = OPENSSL_malloc(slen_full);
- if (!senc) {
- statem_set_error(s);
- return 0;
- }
-
- EVP_CIPHER_CTX_init(&ctx);
- HMAC_CTX_init(&hctx);
-
- p = senc;
- if (!i2d_SSL_SESSION(s->session, &p))
- goto err;
-
- /*
- * create a fresh copy (not shared with other threads) to clean up
- */
- const_p = senc;
- sess = d2i_SSL_SESSION(NULL, &const_p, slen_full);
- if (sess == NULL)
- goto err;
- sess->session_id_length = 0; /* ID is irrelevant for the ticket */
-
- slen = i2d_SSL_SESSION(sess, NULL);
- if (slen == 0 || slen > slen_full) { /* shouldn't ever happen */
- SSL_SESSION_free(sess);
- goto err;
- }
- p = senc;
- if (!i2d_SSL_SESSION(sess, &p)) {
- SSL_SESSION_free(sess);
- goto err;
- }
- SSL_SESSION_free(sess);
-
- /*-
- * Grow buffer if need be: the length calculation is as
- * follows handshake_header_length +
- * 4 (ticket lifetime hint) + 2 (ticket length) +
- * 16 (key name) + max_iv_len (iv length) +
- * session_length + max_enc_block_size (max encrypted session
- * length) + max_md_size (HMAC).
- */
- if (!BUF_MEM_grow(s->init_buf,
- SSL_HM_HEADER_LENGTH(s) + 22 + EVP_MAX_IV_LENGTH +
- EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
- goto err;
-
- p = ssl_handshake_start(s);
- /*
- * Initialize HMAC and cipher contexts. If callback present it does
- * all the work otherwise use generated values from parent ctx.
- */
- if (tctx->tlsext_ticket_key_cb) {
- if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
- &hctx, 1) < 0)
- goto err;
- } else {
- if (RAND_bytes(iv, 16) <= 0)
- goto err;
- if (!EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
- tctx->tlsext_tick_aes_key, iv))
- goto err;
- if (!HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
- EVP_sha256(), NULL))
- goto err;
- memcpy(key_name, tctx->tlsext_tick_key_name, 16);
- }
-
- /*
- * Ticket lifetime hint (advisory only): We leave this unspecified
- * for resumed session (for simplicity), and guess that tickets for
- * new sessions will live as long as their sessions.
- */
- l2n(s->hit ? 0 : s->session->timeout, p);
-
- /* Skip ticket length for now */
- p += 2;
- /* Output key name */
- macstart = p;
- memcpy(p, key_name, 16);
- p += 16;
- /* output IV */
- memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
- p += EVP_CIPHER_CTX_iv_length(&ctx);
- /* Encrypt session data */
- if (!EVP_EncryptUpdate(&ctx, p, &len, senc, slen))
- goto err;
- p += len;
- if (!EVP_EncryptFinal(&ctx, p, &len))
- goto err;
- p += len;
-
- if (!HMAC_Update(&hctx, macstart, p - macstart))
- goto err;
- if (!HMAC_Final(&hctx, p, &hlen))
- goto err;
-
- EVP_CIPHER_CTX_cleanup(&ctx);
- HMAC_CTX_cleanup(&hctx);
-
- p += hlen;
- /* Now write out lengths: p points to end of data written */
- /* Total length */
- len = p - ssl_handshake_start(s);
- /* Skip ticket lifetime hint */
- p = ssl_handshake_start(s) + 4;
- s2n(len - 6, p);
- if (!ssl_set_handshake_header(s, SSL3_MT_NEWSESSION_TICKET, len))
- goto err;
- OPENSSL_free(senc);
-
- return 1;
- err:
- OPENSSL_free(senc);
- EVP_CIPHER_CTX_cleanup(&ctx);
- HMAC_CTX_cleanup(&hctx);
- statem_set_error(s);
- return 0;
-}
-
-int tls_construct_cert_status(SSL *s)
-{
- unsigned char *p;
- /*-
- * Grow buffer if need be: the length calculation is as
- * follows 1 (message type) + 3 (message length) +
- * 1 (ocsp response type) + 3 (ocsp response length)
- * + (ocsp response)
- */
- if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) {
- statem_set_error(s);
- return 0;
- }
-
- p = (unsigned char *)s->init_buf->data;
-
- /* do the header */
- *(p++) = SSL3_MT_CERTIFICATE_STATUS;
- /* message length */
- l2n3(s->tlsext_ocsp_resplen + 4, p);
- /* status type */
- *(p++) = s->tlsext_status_type;
- /* length of OCSP response */
- l2n3(s->tlsext_ocsp_resplen, p);
- /* actual response */
- memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
- /* number of bytes to write */
- s->init_num = 8 + s->tlsext_ocsp_resplen;
- s->init_off = 0;
-
- return 1;
-}
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
-/*
- * tls_process_next_proto reads a Next Protocol Negotiation handshake message.
- * It sets the next_proto member in s if found
- */
-enum MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt)
-{
- PACKET next_proto, padding;
- size_t next_proto_len;
-
- /*-
- * The payload looks like:
- * uint8 proto_len;
- * uint8 proto[proto_len];
- * uint8 padding_len;
- * uint8 padding[padding_len];
- */
- if (!PACKET_get_length_prefixed_1(pkt, &next_proto)
- || !PACKET_get_length_prefixed_1(pkt, &padding)
- || PACKET_remaining(pkt) > 0) {
- SSLerr(SSL_F_TLS_PROCESS_NEXT_PROTO, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
-
- if (!PACKET_memdup(&next_proto, &s->next_proto_negotiated,
- &next_proto_len)) {
- s->next_proto_negotiated_len = 0;
- goto err;
- }
-
- s->next_proto_negotiated_len = (unsigned char)next_proto_len;
-
- return MSG_PROCESS_CONTINUE_READING;
-err:
- statem_set_error(s);
- return MSG_PROCESS_ERROR;
-}
-#endif
-
-#define SSLV2_CIPHER_LEN 3
-
-STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,
- PACKET *cipher_suites,
- STACK_OF(SSL_CIPHER) **skp,
- int sslv2format, int *al
- )
-{
- const SSL_CIPHER *c;
- STACK_OF(SSL_CIPHER) *sk;
- int n;
- /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
- unsigned char cipher[SSLV2_CIPHER_LEN];
-
- s->s3->send_connection_binding = 0;
-
- n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
-
- if (PACKET_remaining(cipher_suites) == 0) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
- *al = SSL_AD_ILLEGAL_PARAMETER;
- return NULL;
- }
-
- if (PACKET_remaining(cipher_suites) % n != 0) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
- SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
- *al = SSL_AD_DECODE_ERROR;
- return NULL;
- }
-
- if ((skp == NULL) || (*skp == NULL)) {
- sk = sk_SSL_CIPHER_new_null(); /* change perhaps later */
- if(sk == NULL) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
- *al = SSL_AD_INTERNAL_ERROR;
- return NULL;
- }
- } else {
- sk = *skp;
- sk_SSL_CIPHER_zero(sk);
- }
-
- if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
- &s->s3->tmp.ciphers_rawlen)) {
- *al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
-
- while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
- /*
- * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
- * first byte set to zero, while true SSLv2 ciphers have a non-zero
- * first byte. We don't support any true SSLv2 ciphers, so skip them.
- */
- if (sslv2format && cipher[0] != '\0')
- continue;
-
- /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
- if ((cipher[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
- (cipher[n - 1] == (SSL3_CK_SCSV & 0xff))) {
- /* SCSV fatal if renegotiating */
- if (s->renegotiate) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
- SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
- *al = SSL_AD_HANDSHAKE_FAILURE;
- goto err;
- }
- s->s3->send_connection_binding = 1;
-#ifdef OPENSSL_RI_DEBUG
- fprintf(stderr, "SCSV received by server\n");
-#endif
- continue;
- }
-
- /* Check for TLS_FALLBACK_SCSV */
- if ((cipher[n - 2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
- (cipher[n - 1] == (SSL3_CK_FALLBACK_SCSV & 0xff))) {
- /*
- * The SCSV indicates that the client previously tried a higher
- * version. Fail if the current version is an unexpected
- * downgrade.
- */
- if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL)) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
- SSL_R_INAPPROPRIATE_FALLBACK);
- *al = SSL_AD_INAPPROPRIATE_FALLBACK;
- goto err;
- }
- continue;
- }
-
- /* For SSLv2-compat, ignore leading 0-byte. */
- c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher);
- if (c != NULL) {
- if (!sk_SSL_CIPHER_push(sk, c)) {
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
- *al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- }
- }
- if (PACKET_remaining(cipher_suites) > 0) {
- *al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (skp != NULL)
- *skp = sk;
- return (sk);
- err:
- if ((skp == NULL) || (*skp == NULL))
- sk_SSL_CIPHER_free(sk);
- return NULL;
-}
# include <openssl/symhacks.h>
#include "record/record.h"
+#include "statem/statem.h"
#include "packet_locl.h"
# ifdef OPENSSL_BUILD_SHLIBSSL
DECLARE_STACK_OF(SSL_COMP)
DECLARE_LHASH_OF(SSL_SESSION);
-/*
- * Valid return codes used for functions performing work prior to or after
- * sending or receiving a message
- */
-enum WORK_STATE {
- /* Something went wrong */
- WORK_ERROR,
- /* We're done working and there shouldn't be anything else to do after */
- WORK_FINISHED_STOP,
- /* We're done working move onto the next thing */
- WORK_FINISHED_CONTINUE,
- /* We're working on phase A */
- WORK_MORE_A,
- /* We're working on phase B */
- WORK_MORE_B
-};
-
-/* Write transition return codes */
-enum WRITE_TRAN {
- /* Something went wrong */
- WRITE_TRAN_ERROR,
- /* A transition was successfully completed and we should continue */
- WRITE_TRAN_CONTINUE,
- /* There is no more write work to be done */
- WRITE_TRAN_FINISHED
-};
-
-/* Message processing return codes */
-enum MSG_PROCESS_RETURN {
- MSG_PROCESS_ERROR,
- MSG_PROCESS_FINISHED_READING,
- MSG_PROCESS_CONTINUE_PROCESSING,
- MSG_PROCESS_CONTINUE_READING
-};
-
-/* Message flow states */
-enum MSG_FLOW_STATE {
- /* No handshake in progress */
- MSG_FLOW_UNINITED,
- /* A permanent error with this connection */
- MSG_FLOW_ERROR,
- /* We are about to renegotiate */
- MSG_FLOW_RENEGOTIATE,
- /* We are reading messages */
- MSG_FLOW_READING,
- /* We are writing messages */
- MSG_FLOW_WRITING,
- /* Handshake has finished */
- MSG_FLOW_FINISHED
-};
-
-/* Read states */
-enum READ_STATE {
- READ_STATE_HEADER,
- READ_STATE_BODY,
- READ_STATE_POST_PROCESS
-};
-
-/* Write states */
-enum WRITE_STATE {
- WRITE_STATE_TRANSITION,
- WRITE_STATE_PRE_WORK,
- WRITE_STATE_SEND,
- WRITE_STATE_POST_WORK
-};
-
-struct statem_st {
- enum MSG_FLOW_STATE state;
- enum WRITE_STATE write_state;
- enum WORK_STATE write_state_work;
- enum READ_STATE read_state;
- enum WORK_STATE read_state_work;
- enum HANDSHAKE_STATE hand_state;
- int in_init;
- int read_state_first_init;
- int use_timer;
-#ifndef OPENSSL_NO_SCTP
- int in_sctp_read_sock;
-#endif
-};
-typedef struct statem_st STATEM;
-
struct ssl_ctx_st {
const SSL_METHOD *method;
__owur int ssl3_digest_cached_records(SSL *s, int keep);
__owur int ssl3_new(SSL *s);
void ssl3_free(SSL *s);
-__owur int ssl3_accept(SSL *s);
-__owur int ssl3_connect(SSL *s);
-void statem_clear(SSL *s);
-void statem_set_renegotiate(SSL *s);
-void statem_set_error(SSL *s);
-int statem_in_error(const SSL *s);
-void statem_set_in_init(SSL *s, int init);
-__owur int statem_app_data_allowed(SSL *s);
-#ifndef OPENSSL_NO_SCTP
-void statem_set_sctp_read_sock(SSL *s, int read_sock);
-__owur int statem_in_sctp_read_sock(SSL *s);
-#endif
__owur int ssl3_read(SSL *s, void *buf, int len);
__owur int ssl3_peek(SSL *s, void *buf, int len);
__owur int ssl3_write(SSL *s, const void *buf, int len);
void dtls1_stop_timer(SSL *s);
__owur int dtls1_is_timer_expired(SSL *s);
void dtls1_double_timeout(SSL *s);
-__owur unsigned int dtls1_raw_hello_verify_request(unsigned char *buf,
- unsigned char *cookie,
- unsigned char cookie_len);
+__owur unsigned int dtls_raw_hello_verify_request(unsigned char *buf,
+ unsigned char *cookie,
+ unsigned char cookie_len);
__owur int dtls1_send_newsession_ticket(SSL *s);
__owur unsigned int dtls1_min_mtu(SSL *s);
__owur unsigned int dtls1_link_min_mtu(void);
void dtls1_hm_fragment_free(hm_fragment *frag);
+__owur int dtls1_query_mtu(SSL *s);
/* some client-only functions */
__owur int tls_construct_client_hello(SSL *s);
long tls1_callback_ctrl(SSL *s, int cmd, void (*fp) (void));
__owur int dtls1_new(SSL *s);
-__owur int dtls1_accept(SSL *s);
-__owur int dtls1_connect(SSL *s);
void dtls1_free(SSL *s);
void dtls1_clear(SSL *s);
long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
+++ /dev/null
-/* ssl/statem.c */
-/*
- * Written by Matt Caswell for the OpenSSL project.
- */
-/* ====================================================================
- * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <openssl/rand.h>
-#include "ssl_locl.h"
-
-/*
- * This file implements the SSL/TLS/DTLS state machines.
- *
- * There are two primary state machines:
- *
- * 1) Message flow state machine
- * 2) Handshake state machine
- *
- * The Message flow state machine controls the reading and sending of messages
- * including handling of non-blocking IO events, flushing of the underlying
- * write BIO, handling unexpected messages, etc. It is itself broken into two
- * separate sub-state machines which control reading and writing respectively.
- *
- * The Handshake state machine keeps track of the current SSL/TLS handshake
- * state. Transitions of the handshake state are the result of events that
- * occur within the Message flow state machine.
- *
- * Overall it looks like this:
- *
- * --------------------------------------------- -------------------
- * | | | |
- * | Message flow state machine | | |
- * | | | |
- * | -------------------- -------------------- | Transition | Handshake state |
- * | | MSG_FLOW_READING | | MSG_FLOW_WRITING | | Event | machine |
- * | | sub-state | | sub-state | |----------->| |
- * | | machine for | | machine for | | | |
- * | | reading messages | | writing messages | | | |
- * | -------------------- -------------------- | | |
- * | | | |
- * --------------------------------------------- -------------------
- *
- */
-
-/* Sub state machine return values */
-enum SUB_STATE_RETURN {
- /* Something bad happened or NBIO */
- SUB_STATE_ERROR,
- /* Sub state finished go to the next sub state */
- SUB_STATE_FINISHED,
- /* Sub state finished and handshake was completed */
- SUB_STATE_END_HANDSHAKE
-};
-
-static int state_machine(SSL *s, int server);
-static void init_read_state_machine(SSL *s);
-static enum SUB_STATE_RETURN read_state_machine(SSL *s);
-static void init_write_state_machine(SSL *s);
-static enum SUB_STATE_RETURN write_state_machine(SSL *s);
-static inline int cert_req_allowed(SSL *s);
-static inline int key_exchange_skip_allowed(SSL *s);
-static int client_read_transition(SSL *s, int mt);
-static enum WRITE_TRAN client_write_transition(SSL *s);
-static enum WORK_STATE client_pre_work(SSL *s, enum WORK_STATE wst);
-static enum WORK_STATE client_post_work(SSL *s, enum WORK_STATE wst);
-static int client_construct_message(SSL *s);
-static unsigned long client_max_message_size(SSL *s);
-static enum MSG_PROCESS_RETURN client_process_message(SSL *s, PACKET *pkt);
-static enum WORK_STATE client_post_process_message(SSL *s, enum WORK_STATE wst);
-static int server_read_transition(SSL *s, int mt);
-static inline int send_server_key_exchange(SSL *s);
-static inline int send_certificate_request(SSL *s);
-static enum WRITE_TRAN server_write_transition(SSL *s);
-static enum WORK_STATE server_pre_work(SSL *s, enum WORK_STATE wst);
-static enum WORK_STATE server_post_work(SSL *s, enum WORK_STATE wst);
-static int server_construct_message(SSL *s);
-static unsigned long server_max_message_size(SSL *s);
-static enum MSG_PROCESS_RETURN server_process_message(SSL *s, PACKET *pkt);
-static enum WORK_STATE server_post_process_message(SSL *s, enum WORK_STATE wst);
-
-
-enum HANDSHAKE_STATE SSL_state(const SSL *ssl)
-{
- return ssl->statem.hand_state;
-}
-
-void SSL_set_state(SSL *ssl, enum HANDSHAKE_STATE state)
-{
- /*
- * This function seems like a really bad idea. Should we remove it
- * completely?
- */
- ssl->statem.hand_state = state;
-}
-
-int SSL_in_init(SSL *s)
-{
- return s->statem.in_init;
-}
-
-int SSL_is_init_finished(SSL *s)
-{
- return !(s->statem.in_init) && (s->statem.hand_state == TLS_ST_OK);
-}
-
-int SSL_in_before(SSL *s)
-{
- /*
- * Historically being "in before" meant before anything had happened. In the
- * current code though we remain in the "before" state for a while after we
- * have started the handshake process (e.g. as a server waiting for the
- * first message to arrive). There "in before" is taken to mean "in before"
- * and not started any handshake process yet.
- */
- return (s->statem.hand_state == TLS_ST_BEFORE)
- && (s->statem.state == MSG_FLOW_UNINITED);
-}
-
-/*
- * Clear the state machine state and reset back to MSG_FLOW_UNINITED
- */
-void statem_clear(SSL *s)
-{
- s->statem.state = MSG_FLOW_UNINITED;
- s->statem.hand_state = TLS_ST_BEFORE;
- s->statem.in_init = 1;
-}
-
-/*
- * Set the state machine up ready for a renegotiation handshake
- */
-void statem_set_renegotiate(SSL *s)
-{
- s->statem.state = MSG_FLOW_RENEGOTIATE;
- s->statem.in_init = 1;
-}
-
-/*
- * Put the state machine into an error state. This is a permanent error for
- * the current connection.
- */
-void statem_set_error(SSL *s)
-{
- s->statem.state = MSG_FLOW_ERROR;
-}
-
-/*
- * Discover whether the current connection is in the error state.
- *
- * Valid return values are:
- * 1: Yes
- * 0: No
- */
-int statem_in_error(const SSL *s)
-{
- if (s->statem.state == MSG_FLOW_ERROR)
- return 1;
-
- return 0;
-}
-
-void statem_set_in_init(SSL *s, int init)
-{
- s->statem.in_init = init;
-}
-
-int ssl3_connect(SSL *s) {
- return state_machine(s, 0);
-}
-
-int dtls1_connect(SSL *s)
-{
- return state_machine(s, 0);
-}
-
-int ssl3_accept(SSL *s)
-{
- return state_machine(s, 1);
-}
-
-int dtls1_accept(SSL *s)
-{
- return state_machine(s, 1);
-}
-
-/*
- * The main message flow state machine. We start in the MSG_FLOW_UNINITED or
- * MSG_FLOW_RENEGOTIATE state and finish in MSG_FLOW_FINISHED. Valid states and
- * transitions are as follows:
- *
- * MSG_FLOW_UNINITED MSG_FLOW_RENEGOTIATE
- * | |
- * +-----------------------+
- * v
- * MSG_FLOW_WRITING <---> MSG_FLOW_READING
- * |
- * V
- * MSG_FLOW_FINISHED
- * |
- * V
- * [SUCCESS]
- *
- * We may exit at any point due to an error or NBIO event. If an NBIO event
- * occurs then we restart at the point we left off when we are recalled.
- * MSG_FLOW_WRITING and MSG_FLOW_READING have sub-state machines associated with them.
- *
- * In addition to the above there is also the MSG_FLOW_ERROR state. We can move
- * into that state at any point in the event that an irrecoverable error occurs.
- *
- * Valid return values are:
- * 1: Success
- * <=0: NBIO or error
- */
-static int state_machine(SSL *s, int server) {
- BUF_MEM *buf = NULL;
- unsigned long Time = (unsigned long)time(NULL);
- void (*cb) (const SSL *ssl, int type, int val) = NULL;
- STATEM *st = &s->statem;
- int ret = -1;
- int ssret;
-
- if (st->state == MSG_FLOW_ERROR) {
- /* Shouldn't have been called if we're already in the error state */
- return -1;
- }
-
- RAND_add(&Time, sizeof(Time), 0);
- ERR_clear_error();
- clear_sys_error();
-
- if (s->info_callback != NULL)
- cb = s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb = s->ctx->info_callback;
-
- s->in_handshake++;
- if (!SSL_in_init(s) || SSL_in_before(s)) {
- if (!SSL_clear(s))
- return -1;
- }
-
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s)) {
- /*
- * Notify SCTP BIO socket to enter handshake mode and prevent stream
- * identifier other than 0. Will be ignored if no SCTP is used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
- s->in_handshake, NULL);
- }
-#endif
-
-#ifndef OPENSSL_NO_HEARTBEATS
- /*
- * If we're awaiting a HeartbeatResponse, pretend we already got and
- * don't await it anymore, because Heartbeats don't make sense during
- * handshakes anyway.
- */
- if (s->tlsext_hb_pending) {
- if (SSL_IS_DTLS(s))
- dtls1_stop_timer(s);
- s->tlsext_hb_pending = 0;
- s->tlsext_hb_seq++;
- }
-#endif
-
- /* Initialise state machine */
-
- if (st->state == MSG_FLOW_RENEGOTIATE) {
- s->renegotiate = 1;
- if (!server)
- s->ctx->stats.sess_connect_renegotiate++;
- }
-
- if (st->state == MSG_FLOW_UNINITED || st->state == MSG_FLOW_RENEGOTIATE) {
- if (st->state == MSG_FLOW_UNINITED) {
- st->hand_state = TLS_ST_BEFORE;
- }
-
- s->server = server;
- if (cb != NULL)
- cb(s, SSL_CB_HANDSHAKE_START, 1);
-
- if (SSL_IS_DTLS(s)) {
- if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
- (server
- || (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00))) {
- SSLerr(SSL_F_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
- goto end;
- }
- } else {
- if ((s->version >> 8) != SSL3_VERSION_MAJOR
- && s->version != TLS_ANY_VERSION) {
- SSLerr(SSL_F_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
- goto end;
- }
- }
-
- if (!SSL_IS_DTLS(s)) {
- if (s->version != TLS_ANY_VERSION &&
- !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
- SSLerr(SSL_F_STATE_MACHINE, SSL_R_VERSION_TOO_LOW);
- goto end;
- }
- }
-
- if (s->init_buf == NULL) {
- if ((buf = BUF_MEM_new()) == NULL) {
- goto end;
- }
- if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
- goto end;
- }
- s->init_buf = buf;
- buf = NULL;
- }
-
- if (!ssl3_setup_buffers(s)) {
- goto end;
- }
- s->init_num = 0;
-
- /*
- * Should have been reset by tls_process_finished, too.
- */
- s->s3->change_cipher_spec = 0;
-
- if (!server || st->state != MSG_FLOW_RENEGOTIATE) {
- /*
- * Ok, we now need to push on a buffering BIO ...but not with
- * SCTP
- */
-#ifndef OPENSSL_NO_SCTP
- if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s)))
-#endif
- if (!ssl_init_wbio_buffer(s, server ? 1 : 0)) {
- goto end;
- }
-
- ssl3_init_finished_mac(s);
- }
-
- if (server) {
- if (st->state != MSG_FLOW_RENEGOTIATE) {
- s->ctx->stats.sess_accept++;
- } else if (!s->s3->send_connection_binding &&
- !(s->options &
- SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
- /*
- * Server attempting to renegotiate with client that doesn't
- * support secure renegotiation.
- */
- SSLerr(SSL_F_STATE_MACHINE,
- SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- statem_set_error(s);
- goto end;
- } else {
- /*
- * s->state == SSL_ST_RENEGOTIATE, we will just send a
- * HelloRequest
- */
- s->ctx->stats.sess_accept_renegotiate++;
- }
- } else {
- s->ctx->stats.sess_connect++;
-
- /* mark client_random uninitialized */
- memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
- s->hit = 0;
-
- s->s3->tmp.cert_request = 0;
-
- if (SSL_IS_DTLS(s)) {
- st->use_timer = 1;
- }
- }
-
- st->state = MSG_FLOW_WRITING;
- init_write_state_machine(s);
- st->read_state_first_init = 1;
- }
-
- while(st->state != MSG_FLOW_FINISHED) {
- if(st->state == MSG_FLOW_READING) {
- ssret = read_state_machine(s);
- if (ssret == SUB_STATE_FINISHED) {
- st->state = MSG_FLOW_WRITING;
- init_write_state_machine(s);
- } else {
- /* NBIO or error */
- goto end;
- }
- } else if (st->state == MSG_FLOW_WRITING) {
- ssret = write_state_machine(s);
- if (ssret == SUB_STATE_FINISHED) {
- st->state = MSG_FLOW_READING;
- init_read_state_machine(s);
- } else if (ssret == SUB_STATE_END_HANDSHAKE) {
- st->state = MSG_FLOW_FINISHED;
- } else {
- /* NBIO or error */
- goto end;
- }
- } else {
- /* Error */
- statem_set_error(s);
- goto end;
- }
- }
-
- st->state = MSG_FLOW_UNINITED;
- ret = 1;
-
- end:
- s->in_handshake--;
-
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s)) {
- /*
- * Notify SCTP BIO socket to leave handshake mode and allow stream
- * identifier other than 0. Will be ignored if no SCTP is used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
- s->in_handshake, NULL);
- }
-#endif
-
- BUF_MEM_free(buf);
- if (cb != NULL) {
- if (server)
- cb(s, SSL_CB_ACCEPT_EXIT, ret);
- else
- cb(s, SSL_CB_CONNECT_EXIT, ret);
- }
- return ret;
-}
-
-/*
- * Initialise the MSG_FLOW_READING sub-state machine
- */
-static void init_read_state_machine(SSL *s)
-{
- STATEM *st = &s->statem;
-
- st->read_state = READ_STATE_HEADER;
-}
-
-/*
- * This function implements the sub-state machine when the message flow is in
- * MSG_FLOW_READING. The valid sub-states and transitions are:
- *
- * READ_STATE_HEADER <--+<-------------+
- * | | |
- * v | |
- * READ_STATE_BODY -----+-->READ_STATE_POST_PROCESS
- * | |
- * +----------------------------+
- * v
- * [SUB_STATE_FINISHED]
- *
- * READ_STATE_HEADER has the responsibility for reading in the message header
- * and transitioning the state of the handshake state machine.
- *
- * READ_STATE_BODY reads in the rest of the message and then subsequently
- * processes it.
- *
- * READ_STATE_POST_PROCESS is an optional step that may occur if some post
- * processing activity performed on the message may block.
- *
- * Any of the above states could result in an NBIO event occuring in which case
- * control returns to the calling application. When this function is recalled we
- * will resume in the same state where we left off.
- */
-static enum SUB_STATE_RETURN read_state_machine(SSL *s) {
- STATEM *st = &s->statem;
- int ret, mt;
- unsigned long len;
- int (*transition)(SSL *s, int mt);
- PACKET pkt;
- enum MSG_PROCESS_RETURN (*process_message)(SSL *s, PACKET *pkt);
- enum WORK_STATE (*post_process_message)(SSL *s, enum WORK_STATE wst);
- unsigned long (*max_message_size)(SSL *s);
- void (*cb) (const SSL *ssl, int type, int val) = NULL;
-
- if (s->info_callback != NULL)
- cb = s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb = s->ctx->info_callback;
-
- if(s->server) {
- transition = server_read_transition;
- process_message = server_process_message;
- max_message_size = server_max_message_size;
- post_process_message = server_post_process_message;
- } else {
- transition = client_read_transition;
- process_message = client_process_message;
- max_message_size = client_max_message_size;
- post_process_message = client_post_process_message;
- }
-
- if (st->read_state_first_init) {
- s->first_packet = 1;
- st->read_state_first_init = 0;
- }
-
- while(1) {
- switch(st->read_state) {
- case READ_STATE_HEADER:
- s->init_num = 0;
- /* Get the state the peer wants to move to */
- if (SSL_IS_DTLS(s)) {
- /*
- * In DTLS we get the whole message in one go - header and body
- */
- ret = dtls_get_message(s, &mt, &len);
- } else {
- ret = tls_get_message_header(s, &mt);
- }
-
- if (ret == 0) {
- /* Could be non-blocking IO */
- return SUB_STATE_ERROR;
- }
-
- if (cb != NULL) {
- /* Notify callback of an impending state change */
- if (s->server)
- cb(s, SSL_CB_ACCEPT_LOOP, 1);
- else
- cb(s, SSL_CB_CONNECT_LOOP, 1);
- }
- /*
- * Validate that we are allowed to move to the new state and move
- * to that state if so
- */
- if(!transition(s, mt)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
- SSLerr(SSL_F_READ_STATE_MACHINE, SSL_R_UNEXPECTED_MESSAGE);
- return SUB_STATE_ERROR;
- }
-
- if (s->s3->tmp.message_size > max_message_size(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
- SSLerr(SSL_F_READ_STATE_MACHINE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
- return SUB_STATE_ERROR;
- }
-
- st->read_state = READ_STATE_BODY;
- /* Fall through */
-
- case READ_STATE_BODY:
- if (!SSL_IS_DTLS(s)) {
- /* We already got this above for DTLS */
- ret = tls_get_message_body(s, &len);
- if (ret == 0) {
- /* Could be non-blocking IO */
- return SUB_STATE_ERROR;
- }
- }
-
- s->first_packet = 0;
- if (!PACKET_buf_init(&pkt, s->init_msg, len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_READ_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
- return SUB_STATE_ERROR;
- }
- ret = process_message(s, &pkt);
- if (ret == MSG_PROCESS_ERROR) {
- return SUB_STATE_ERROR;
- }
-
- if (ret == MSG_PROCESS_FINISHED_READING) {
- if (SSL_IS_DTLS(s)) {
- dtls1_stop_timer(s);
- }
- return SUB_STATE_FINISHED;
- }
-
- if (ret == MSG_PROCESS_CONTINUE_PROCESSING) {
- st->read_state = READ_STATE_POST_PROCESS;
- st->read_state_work = WORK_MORE_A;
- } else {
- st->read_state = READ_STATE_HEADER;
- }
- break;
-
- case READ_STATE_POST_PROCESS:
- st->read_state_work = post_process_message(s, st->read_state_work);
- switch(st->read_state_work) {
- default:
- return SUB_STATE_ERROR;
-
- case WORK_FINISHED_CONTINUE:
- st->read_state = READ_STATE_HEADER;
- break;
-
- case WORK_FINISHED_STOP:
- if (SSL_IS_DTLS(s)) {
- dtls1_stop_timer(s);
- }
- return SUB_STATE_FINISHED;
- }
- break;
-
- default:
- /* Shouldn't happen */
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_READ_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
- statem_set_error(s);
- return SUB_STATE_ERROR;
- }
- }
-}
-
-/*
- * Send a previously constructed message to the peer.
- */
-static int statem_do_write(SSL *s)
-{
- STATEM *st = &s->statem;
-
- if (st->hand_state == TLS_ST_CW_CHANGE
- || st->hand_state == TLS_ST_SW_CHANGE) {
- if (SSL_IS_DTLS(s))
- return dtls1_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
- else
- return ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
- } else {
- return ssl_do_write(s);
- }
-}
-
-/*
- * Initialise the MSG_FLOW_WRITING sub-state machine
- */
-static void init_write_state_machine(SSL *s)
-{
- STATEM *st = &s->statem;
-
- st->write_state = WRITE_STATE_TRANSITION;
-}
-
-/*
- * This function implements the sub-state machine when the message flow is in
- * MSG_FLOW_WRITING. The valid sub-states and transitions are:
- *
- * +-> WRITE_STATE_TRANSITION ------> [SUB_STATE_FINISHED]
- * | |
- * | v
- * | WRITE_STATE_PRE_WORK -----> [SUB_STATE_END_HANDSHAKE]
- * | |
- * | v
- * | WRITE_STATE_SEND
- * | |
- * | v
- * | WRITE_STATE_POST_WORK
- * | |
- * +-------------+
- *
- * WRITE_STATE_TRANSITION transitions the state of the handshake state machine
-
- * WRITE_STATE_PRE_WORK performs any work necessary to prepare the later
- * sending of the message. This could result in an NBIO event occuring in
- * which case control returns to the calling application. When this function
- * is recalled we will resume in the same state where we left off.
- *
- * WRITE_STATE_SEND sends the message and performs any work to be done after
- * sending.
- *
- * WRITE_STATE_POST_WORK performs any work necessary after the sending of the
- * message has been completed. As for WRITE_STATE_PRE_WORK this could also
- * result in an NBIO event.
- */
-static enum SUB_STATE_RETURN write_state_machine(SSL *s)
-{
- STATEM *st = &s->statem;
- int ret;
- enum WRITE_TRAN (*transition)(SSL *s);
- enum WORK_STATE (*pre_work)(SSL *s, enum WORK_STATE wst);
- enum WORK_STATE (*post_work)(SSL *s, enum WORK_STATE wst);
- int (*construct_message)(SSL *s);
- void (*cb) (const SSL *ssl, int type, int val) = NULL;
-
- if (s->info_callback != NULL)
- cb = s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb = s->ctx->info_callback;
-
- if(s->server) {
- transition = server_write_transition;
- pre_work = server_pre_work;
- post_work = server_post_work;
- construct_message = server_construct_message;
- } else {
- transition = client_write_transition;
- pre_work = client_pre_work;
- post_work = client_post_work;
- construct_message = client_construct_message;
- }
-
- while(1) {
- switch(st->write_state) {
- case WRITE_STATE_TRANSITION:
- if (cb != NULL) {
- /* Notify callback of an impending state change */
- if (s->server)
- cb(s, SSL_CB_ACCEPT_LOOP, 1);
- else
- cb(s, SSL_CB_CONNECT_LOOP, 1);
- }
- switch(transition(s)) {
- case WRITE_TRAN_CONTINUE:
- st->write_state = WRITE_STATE_PRE_WORK;
- st->write_state_work = WORK_MORE_A;
- break;
-
- case WRITE_TRAN_FINISHED:
- return SUB_STATE_FINISHED;
- break;
-
- default:
- return SUB_STATE_ERROR;
- }
- break;
-
- case WRITE_STATE_PRE_WORK:
- switch(st->write_state_work = pre_work(s, st->write_state_work)) {
- default:
- return SUB_STATE_ERROR;
-
- case WORK_FINISHED_CONTINUE:
- st->write_state = WRITE_STATE_SEND;
- break;
-
- case WORK_FINISHED_STOP:
- return SUB_STATE_END_HANDSHAKE;
- }
- if(construct_message(s) == 0)
- return SUB_STATE_ERROR;
-
- /* Fall through */
-
- case WRITE_STATE_SEND:
- if (SSL_IS_DTLS(s) && st->use_timer) {
- dtls1_start_timer(s);
- }
- ret = statem_do_write(s);
- if (ret <= 0) {
- return SUB_STATE_ERROR;
- }
- st->write_state = WRITE_STATE_POST_WORK;
- st->write_state_work = WORK_MORE_A;
- /* Fall through */
-
- case WRITE_STATE_POST_WORK:
- switch(st->write_state_work = post_work(s, st->write_state_work)) {
- default:
- return SUB_STATE_ERROR;
-
- case WORK_FINISHED_CONTINUE:
- st->write_state = WRITE_STATE_TRANSITION;
- break;
-
- case WORK_FINISHED_STOP:
- return SUB_STATE_END_HANDSHAKE;
- }
- break;
-
- default:
- return SUB_STATE_ERROR;
- }
- }
-}
-
-/*
- * Flush the write BIO
- */
-static int statem_flush(SSL *s)
-{
- s->rwstate = SSL_WRITING;
- if (BIO_flush(s->wbio) <= 0) {
- return 0;
- }
- s->rwstate = SSL_NOTHING;
-
- return 1;
-}
-
-/*
- * Called by the record layer to determine whether application data is
- * allowed to be sent in the current handshake state or not.
- *
- * Return values are:
- * 1: Yes (application data allowed)
- * 0: No (application data not allowed)
- */
-int statem_app_data_allowed(SSL *s)
-{
- STATEM *st = &s->statem;
-
- if (st->state == MSG_FLOW_UNINITED || st->state == MSG_FLOW_RENEGOTIATE)
- return 0;
-
- if (!s->s3->in_read_app_data || (s->s3->total_renegotiations == 0))
- return 0;
-
- if (s->server) {
- /*
- * If we're a server and we haven't got as far as writing our
- * ServerHello yet then we allow app data
- */
- if (st->hand_state == TLS_ST_BEFORE
- || st->hand_state == TLS_ST_SR_CLNT_HELLO)
- return 1;
- } else {
- /*
- * If we're a client and we haven't read the ServerHello yet then we
- * allow app data
- */
- if (st->hand_state == TLS_ST_CW_CLNT_HELLO)
- return 1;
- }
-
- return 0;
-}
-
-
-#ifndef OPENSSL_NO_SCTP
-/*
- * Set flag used by SCTP to determine whether we are in the read sock state
- */
-void statem_set_sctp_read_sock(SSL *s, int read_sock)
-{
- s->statem.in_sctp_read_sock = read_sock;
-}
-
-/*
- * Called by the record layer to determine whether we are in the read sock
- * state or not.
- *
- * Return values are:
- * 1: Yes (we are in the read sock state)
- * 0: No (we are not in the read sock state)
- */
-int statem_in_sctp_read_sock(SSL *s)
-{
- return s->statem.in_sctp_read_sock;
-}
-#endif
-
-/*
- * Is a CertificateRequest message allowed at the moment or not?
- *
- * Return values are:
- * 1: Yes
- * 0: No
- */
-static inline int cert_req_allowed(SSL *s)
-{
- /* TLS does not like anon-DH with client cert */
- if (s->version > SSL3_VERSION
- && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
- return 0;
-
- return 1;
-}
-
-/*
- * Are we allowed to skip the ServerKeyExchange message?
- *
- * Return values are:
- * 1: Yes
- * 0: No
- */
-static inline int key_exchange_skip_allowed(SSL *s)
-{
- long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- /*
- * Can't skip server key exchange if this is an ephemeral
- * ciphersuite.
- */
- if (alg_k & (SSL_kDHE | SSL_kECDHE)) {
- return 0;
- }
-
- return 1;
-}
-
-/*
- * client_read_transition() encapsulates the logic for the allowed handshake
- * state transitions when the client is reading messages from the server. The
- * message type that the server has sent is provided in |mt|. The current state
- * is in |s->statem.hand_state|.
- *
- * Return values are:
- * 1: Success (transition allowed)
- * 0: Error (transition not allowed)
- */
-static int client_read_transition(SSL *s, int mt)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- if (mt == SSL3_MT_SERVER_HELLO) {
- st->hand_state = TLS_ST_CR_SRVR_HELLO;
- return 1;
- }
-
- if (SSL_IS_DTLS(s)) {
- if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
- st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
- return 1;
- }
- }
- break;
-
- case TLS_ST_CR_SRVR_HELLO:
- if (s->hit) {
- if (s->tlsext_ticket_expected) {
- if (mt == SSL3_MT_NEWSESSION_TICKET) {
- st->hand_state = TLS_ST_CR_SESSION_TICKET;
- return 1;
- }
- } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- } else {
- if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
- st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
- return 1;
- } else if (!(s->s3->tmp.new_cipher->algorithm_auth
- & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
- if (mt == SSL3_MT_CERTIFICATE) {
- st->hand_state = TLS_ST_CR_CERT;
- return 1;
- }
- } else {
- if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_CR_KEY_EXCH;
- return 1;
- } else if (key_exchange_skip_allowed(s)) {
- if (mt == SSL3_MT_CERTIFICATE_REQUEST
- && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- } else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- }
- }
- }
- break;
-
- case TLS_ST_CR_CERT:
- if (s->tlsext_status_expected) {
- if (mt == SSL3_MT_CERTIFICATE_STATUS) {
- st->hand_state = TLS_ST_CR_CERT_STATUS;
- return 1;
- }
- } else {
- if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_CR_KEY_EXCH;
- return 1;
- } else if (key_exchange_skip_allowed(s)) {
- if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- } else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- }
- }
- break;
-
- case TLS_ST_CR_CERT_STATUS:
- if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_CR_KEY_EXCH;
- return 1;
- } else if (key_exchange_skip_allowed(s)) {
- if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- } else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- }
- break;
-
- case TLS_ST_CR_KEY_EXCH:
- if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- } else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- break;
-
- case TLS_ST_CR_CERT_REQ:
- if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- break;
-
- case TLS_ST_CW_FINISHED:
- if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
- st->hand_state = TLS_ST_CR_SESSION_TICKET;
- return 1;
- } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- break;
-
- case TLS_ST_CR_SESSION_TICKET:
- if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- break;
-
- case TLS_ST_CR_CHANGE:
- if (mt == SSL3_MT_FINISHED) {
- st->hand_state = TLS_ST_CR_FINISHED;
- return 1;
- }
- break;
-
- default:
- break;
- }
-
- /* No valid transition found */
- return 0;
-}
-
-/*
- * client_write_transition() works out what handshake state to move to next
- * when the client is writing messages to be sent to the server.
- */
-static enum WRITE_TRAN client_write_transition(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_OK:
- /* Renegotiation - fall through */
- case TLS_ST_BEFORE:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CW_CLNT_HELLO:
- /*
- * No transition at the end of writing because we don't know what
- * we will be sent
- */
- return WRITE_TRAN_FINISHED;
-
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CR_SRVR_DONE:
- if (s->s3->tmp.cert_req)
- st->hand_state = TLS_ST_CW_CERT;
- else
- st->hand_state = TLS_ST_CW_KEY_EXCH;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CW_CERT:
- st->hand_state = TLS_ST_CW_KEY_EXCH;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CW_KEY_EXCH:
- /*
- * For TLS, cert_req is set to 2, so a cert chain of nothing is
- * sent, but no verify packet is sent
- */
- /*
- * XXX: For now, we do not support client authentication in ECDH
- * cipher suites with ECDH (rather than ECDSA) certificates. We
- * need to skip the certificate verify message when client's
- * ECDH public key is sent inside the client certificate.
- */
- if (s->s3->tmp.cert_req == 1) {
- st->hand_state = TLS_ST_CW_CERT_VRFY;
- } else {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
- if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CW_CERT_VRFY:
- st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_CW_CHANGE:
-#if defined(OPENSSL_NO_NEXTPROTONEG)
- st->hand_state = TLS_ST_CW_FINISHED;
-#else
- if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
- st->hand_state = TLS_ST_CW_NEXT_PROTO;
- else
- st->hand_state = TLS_ST_CW_FINISHED;
-#endif
- return WRITE_TRAN_CONTINUE;
-
-#if !defined(OPENSSL_NO_NEXTPROTONEG)
- case TLS_ST_CW_NEXT_PROTO:
- st->hand_state = TLS_ST_CW_FINISHED;
- return WRITE_TRAN_CONTINUE;
-#endif
-
- case TLS_ST_CW_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_OK;
- statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- } else {
- return WRITE_TRAN_FINISHED;
- }
-
- case TLS_ST_CR_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
- } else {
- st->hand_state = TLS_ST_OK;
- statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- }
-
- default:
- /* Shouldn't happen */
- return WRITE_TRAN_ERROR;
- }
-}
-
-/*
- * Perform any pre work that needs to be done prior to sending a message from
- * the client to the server.
- */
-static enum WORK_STATE client_pre_work(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- s->shutdown = 0;
- if (SSL_IS_DTLS(s)) {
- /* every DTLS ClientHello resets Finished MAC */
- ssl3_init_finished_mac(s);
- }
- break;
-
- case TLS_ST_CW_CERT:
- return tls_prepare_client_certificate(s, wst);
-
- case TLS_ST_CW_CHANGE:
- if (SSL_IS_DTLS(s)) {
- if (s->hit) {
- /*
- * We're into the last flight so we don't retransmit these
- * messages unless we need to.
- */
- st->use_timer = 0;
- }
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
- return dtls_wait_for_dry(s);
-#endif
- }
- return WORK_FINISHED_CONTINUE;
-
- case TLS_ST_OK:
- return tls_finish_handshake(s, wst);
-
- default:
- /* No pre work to be done */
- break;
- }
-
- return WORK_FINISHED_CONTINUE;
-}
-
-/*
- * Perform any work that needs to be done after sending a message from the
- * client to the server.
- */
-static enum WORK_STATE client_post_work(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- s->init_num = 0;
-
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
- return WORK_MORE_A;
-#ifndef OPENSSL_NO_SCTP
- /* Disable buffering for SCTP */
- if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
-#endif
- /*
- * turn on buffering for the next lot of output
- */
- if (s->bbio != s->wbio)
- s->wbio = BIO_push(s->bbio, s->wbio);
-#ifndef OPENSSL_NO_SCTP
- }
-#endif
- if (SSL_IS_DTLS(s)) {
- /* Treat the next message as the first packet */
- s->first_packet = 1;
- }
- break;
-
- case TLS_ST_CW_KEY_EXCH:
- if (tls_client_key_exchange_post_work(s) == 0)
- return WORK_ERROR;
- break;
-
- case TLS_ST_CW_CHANGE:
- s->session->cipher = s->s3->tmp.new_cipher;
-#ifdef OPENSSL_NO_COMP
- s->session->compress_meth = 0;
-#else
- if (s->s3->tmp.new_compression == NULL)
- s->session->compress_meth = 0;
- else
- s->session->compress_meth = s->s3->tmp.new_compression->id;
-#endif
- if (!s->method->ssl3_enc->setup_key_block(s))
- return WORK_ERROR;
-
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_CLIENT_WRITE))
- return WORK_ERROR;
-
- if (SSL_IS_DTLS(s)) {
-#ifndef OPENSSL_NO_SCTP
- if (s->hit) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
-#endif
-
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- }
- break;
-
- case TLS_ST_CW_FINISHED:
-#ifndef OPENSSL_NO_SCTP
- if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
-#endif
- if (statem_flush(s) != 1)
- return WORK_MORE_B;
-
- if (s->hit && tls_finish_handshake(s, WORK_MORE_A) != 1)
- return WORK_ERROR;
- break;
-
- default:
- /* No post work to be done */
- break;
- }
-
- return WORK_FINISHED_CONTINUE;
-}
-
-/*
- * Construct a message to be sent from the client to the server.
- *
- * Valid return values are:
- * 1: Success
- * 0: Error
- */
-static int client_construct_message(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- return tls_construct_client_hello(s);
-
- case TLS_ST_CW_CERT:
- return tls_construct_client_certificate(s);
-
- case TLS_ST_CW_KEY_EXCH:
- return tls_construct_client_key_exchange(s);
-
- case TLS_ST_CW_CERT_VRFY:
- return tls_construct_client_verify(s);
-
- case TLS_ST_CW_CHANGE:
- if (SSL_IS_DTLS(s))
- return dtls_construct_change_cipher_spec(s);
- else
- return tls_construct_change_cipher_spec(s);
-
-#if !defined(OPENSSL_NO_NEXTPROTONEG)
- case TLS_ST_CW_NEXT_PROTO:
- return tls_construct_next_proto(s);
-#endif
- case TLS_ST_CW_FINISHED:
- return tls_construct_finished(s,
- s->method->
- ssl3_enc->client_finished_label,
- s->method->
- ssl3_enc->client_finished_label_len);
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return 0;
-}
-
-/* The spec allows for a longer length than this, but we limit it */
-#define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
-#define SERVER_HELLO_MAX_LENGTH 20000
-#define SERVER_KEY_EXCH_MAX_LENGTH 102400
-#define SERVER_HELLO_DONE_MAX_LENGTH 0
-#define CCS_MAX_LENGTH 1
-/* Max should actually be 36 but we are generous */
-#define FINISHED_MAX_LENGTH 64
-
-/*
- * Returns the maximum allowed length for the current message that we are
- * reading. Excludes the message header.
- */
-static unsigned long client_max_message_size(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return SERVER_HELLO_MAX_LENGTH;
-
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return HELLO_VERIFY_REQUEST_MAX_LENGTH;
-
- case TLS_ST_CR_CERT:
- return s->max_cert_list;
-
- case TLS_ST_CR_CERT_STATUS:
- return SSL3_RT_MAX_PLAIN_LENGTH;
-
- case TLS_ST_CR_KEY_EXCH:
- return SERVER_KEY_EXCH_MAX_LENGTH;
-
- case TLS_ST_CR_CERT_REQ:
- return SSL3_RT_MAX_PLAIN_LENGTH;
-
- case TLS_ST_CR_SRVR_DONE:
- return SERVER_HELLO_DONE_MAX_LENGTH;
-
- case TLS_ST_CR_CHANGE:
- return CCS_MAX_LENGTH;
-
- case TLS_ST_CR_SESSION_TICKET:
- return SSL3_RT_MAX_PLAIN_LENGTH;
-
- case TLS_ST_CR_FINISHED:
- return FINISHED_MAX_LENGTH;
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return 0;
-}
-
-/*
- * Process a message that the client has been received from the server.
- */
-static enum MSG_PROCESS_RETURN client_process_message(SSL *s, PACKET *pkt)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return tls_process_server_hello(s, pkt);
-
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return dtls_process_hello_verify(s, pkt);
-
- case TLS_ST_CR_CERT:
- return tls_process_server_certificate(s, pkt);
-
- case TLS_ST_CR_CERT_STATUS:
- return tls_process_cert_status(s, pkt);
-
- case TLS_ST_CR_KEY_EXCH:
- return tls_process_key_exchange(s, pkt);
-
- case TLS_ST_CR_CERT_REQ:
- return tls_process_certificate_request(s, pkt);
-
- case TLS_ST_CR_SRVR_DONE:
- return tls_process_server_done(s, pkt);
-
- case TLS_ST_CR_CHANGE:
- return tls_process_change_cipher_spec(s, pkt);
-
- case TLS_ST_CR_SESSION_TICKET:
- return tls_process_new_session_ticket(s, pkt);
-
- case TLS_ST_CR_FINISHED:
- return tls_process_finished(s, pkt);
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return MSG_PROCESS_ERROR;
-}
-
-/*
- * Perform any further processing required following the receipt of a message
- * from the server
- */
-static enum WORK_STATE client_post_process_message(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
-#ifndef OPENSSL_NO_SCTP
- case TLS_ST_CR_SRVR_DONE:
- /* We only get here if we are using SCTP and we are renegotiating */
- if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- statem_set_sctp_read_sock(s, 1);
- return WORK_MORE_A;
- }
- statem_set_sctp_read_sock(s, 0);
- return WORK_FINISHED_STOP;
-#endif
-
- case TLS_ST_CR_FINISHED:
- if (!s->hit)
- return tls_finish_handshake(s, wst);
- else
- return WORK_FINISHED_STOP;
- default:
- break;
- }
-
- /* Shouldn't happen */
- return WORK_ERROR;
-}
-
-
-/*
- * server_read_transition() encapsulates the logic for the allowed handshake
- * state transitions when the server is reading messages from the client. The
- * message type that the client has sent is provided in |mt|. The current state
- * is in |s->statem.hand_state|.
- *
- * Valid return values are:
- * 1: Success (transition allowed)
- * 0: Error (transition not allowed)
- */
-static int server_read_transition(SSL *s, int mt)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_BEFORE:
- case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
- if (mt == SSL3_MT_CLIENT_HELLO) {
- st->hand_state = TLS_ST_SR_CLNT_HELLO;
- return 1;
- }
- break;
-
- case TLS_ST_SW_SRVR_DONE:
- /*
- * If we get a CKE message after a ServerDone then either
- * 1) We didn't request a Certificate
- * OR
- * 2) If we did request one then
- * a) We allow no Certificate to be returned
- * AND
- * b) We are running SSL3 (in TLS1.0+ the client must return a 0
- * list if we requested a certificate)
- */
- if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE
- && (!s->s3->tmp.cert_request
- || (!((s->verify_mode & SSL_VERIFY_PEER) &&
- (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
- && (s->version == SSL3_VERSION)))) {
- st->hand_state = TLS_ST_SR_KEY_EXCH;
- return 1;
- } else if (s->s3->tmp.cert_request) {
- if (mt == SSL3_MT_CERTIFICATE) {
- st->hand_state = TLS_ST_SR_CERT;
- return 1;
- }
- }
- break;
-
- case TLS_ST_SR_CERT:
- if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_SR_KEY_EXCH;
- return 1;
- }
- break;
-
- case TLS_ST_SR_KEY_EXCH:
- /*
- * We should only process a CertificateVerify message if we have
- * received a Certificate from the client. If so then |s->session->peer|
- * will be non NULL. In some instances a CertificateVerify message is
- * not required even if the peer has sent a Certificate (e.g. such as in
- * the case of static DH). In that case |s->no_cert_verify| should be
- * set.
- */
- if (s->session->peer == NULL || s->no_cert_verify) {
- if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- /*
- * For the ECDH ciphersuites when the client sends its ECDH
- * pub key in a certificate, the CertificateVerify message is
- * not sent. Also for GOST ciphersuites when the client uses
- * its key from the certificate for key exchange.
- */
- st->hand_state = TLS_ST_SR_CHANGE;
- return 1;
- }
- } else {
- if (mt == SSL3_MT_CERTIFICATE_VERIFY) {
- st->hand_state = TLS_ST_SR_CERT_VRFY;
- return 1;
- }
- }
- break;
-
- case TLS_ST_SR_CERT_VRFY:
- if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_SR_CHANGE;
- return 1;
- }
- break;
-
- case TLS_ST_SR_CHANGE:
-#ifndef OPENSSL_NO_NEXTPROTONEG
- if (s->s3->next_proto_neg_seen) {
- if (mt == SSL3_MT_NEXT_PROTO) {
- st->hand_state = TLS_ST_SR_NEXT_PROTO;
- return 1;
- }
- } else {
-#endif
- if (mt == SSL3_MT_FINISHED) {
- st->hand_state = TLS_ST_SR_FINISHED;
- return 1;
- }
-#ifndef OPENSSL_NO_NEXTPROTONEG
- }
-#endif
- break;
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- case TLS_ST_SR_NEXT_PROTO:
- if (mt == SSL3_MT_FINISHED) {
- st->hand_state = TLS_ST_SR_FINISHED;
- return 1;
- }
- break;
-#endif
-
- case TLS_ST_SW_FINISHED:
- if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_SR_CHANGE;
- return 1;
- }
- break;
-
- default:
- break;
- }
-
- /* No valid transition found */
- return 0;
-}
-
-/*
- * Should we send a ServerKeyExchange message?
- *
- * Valid return values are:
- * 1: Yes
- * 0: No
- */
-static inline int send_server_key_exchange(SSL *s)
-{
- unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- /*
- * only send a ServerKeyExchange if DH, fortezza or RSA but we have a
- * sign only certificate PSK: may send PSK identity hints For
- * ECC ciphersuites, we send a serverKeyExchange message only if
- * the cipher suite is either ECDH-anon or ECDHE. In other cases,
- * the server certificate contains the server's public key for
- * key exchange.
- */
- if ( (alg_k & SSL_kDHE)
- || (alg_k & SSL_kECDHE)
- || ((alg_k & SSL_kRSA)
- && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
- || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
- && EVP_PKEY_size(s->cert->pkeys
- [SSL_PKEY_RSA_ENC].privatekey) *
- 8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
- )
- )
- )
- /*
- * PSK: send ServerKeyExchange if PSK identity hint if
- * provided
- */
-#ifndef OPENSSL_NO_PSK
- /* Only send SKE if we have identity hint for plain PSK */
- || ((alg_k & (SSL_kPSK | SSL_kRSAPSK))
- && s->cert->psk_identity_hint)
- /* For other PSK always send SKE */
- || (alg_k & (SSL_PSK & (SSL_kDHEPSK | SSL_kECDHEPSK)))
-#endif
-#ifndef OPENSSL_NO_SRP
- /* SRP: send ServerKeyExchange */
- || (alg_k & SSL_kSRP)
-#endif
- ) {
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Should we send a CertificateRequest message?
- *
- * Valid return values are:
- * 1: Yes
- * 0: No
- */
-static inline int send_certificate_request(SSL *s)
-{
- if (
- /* don't request cert unless asked for it: */
- s->verify_mode & SSL_VERIFY_PEER
- /*
- * if SSL_VERIFY_CLIENT_ONCE is set, don't request cert
- * during re-negotiation:
- */
- && ((s->session->peer == NULL) ||
- !(s->verify_mode & SSL_VERIFY_CLIENT_ONCE))
- /*
- * never request cert in anonymous ciphersuites (see
- * section "Certificate request" in SSL 3 drafts and in
- * RFC 2246):
- */
- && (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
- /*
- * ... except when the application insists on
- * verification (against the specs, but s3_clnt.c accepts
- * this for SSL 3)
- */
- || (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
- /* don't request certificate for SRP auth */
- && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aSRP)
- /*
- * With normal PSK Certificates and Certificate Requests
- * are omitted
- */
- && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)) {
- return 1;
- }
-
- return 0;
-}
-
-/*
- * server_write_transition() works out what handshake state to move to next
- * when the server is writing messages to be sent to the client.
- */
-static enum WRITE_TRAN server_write_transition(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_BEFORE:
- /* Just go straight to trying to read from the client */;
- return WRITE_TRAN_FINISHED;
-
- case TLS_ST_OK:
- /* We must be trying to renegotiate */
- st->hand_state = TLS_ST_SW_HELLO_REQ;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_HELLO_REQ:
- st->hand_state = TLS_ST_OK;
- statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SR_CLNT_HELLO:
- if (SSL_IS_DTLS(s) && !s->d1->cookie_verified
- && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
- st->hand_state = DTLS_ST_SW_HELLO_VERIFY_REQUEST;
- else
- st->hand_state = TLS_ST_SW_SRVR_HELLO;
- return WRITE_TRAN_CONTINUE;
-
- case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
- return WRITE_TRAN_FINISHED;
-
- case TLS_ST_SW_SRVR_HELLO:
- if (s->hit) {
- if (s->tlsext_ticket_expected)
- st->hand_state = TLS_ST_SW_SESSION_TICKET;
- else
- st->hand_state = TLS_ST_SW_CHANGE;
- } else {
- /* Check if it is anon DH or anon ECDH, */
- /* normal PSK or SRP */
- if (!(s->s3->tmp.new_cipher->algorithm_auth &
- (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
- st->hand_state = TLS_ST_SW_CERT;
- } else if (send_server_key_exchange(s)) {
- st->hand_state = TLS_ST_SW_KEY_EXCH;
- } else if (send_certificate_request(s)) {
- st->hand_state = TLS_ST_SW_CERT_REQ;
- } else {
- st->hand_state = TLS_ST_SW_SRVR_DONE;
- }
- }
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_CERT:
- if (s->tlsext_status_expected) {
- st->hand_state = TLS_ST_SW_CERT_STATUS;
- return WRITE_TRAN_CONTINUE;
- }
- /* Fall through */
-
- case TLS_ST_SW_CERT_STATUS:
- if (send_server_key_exchange(s)) {
- st->hand_state = TLS_ST_SW_KEY_EXCH;
- return WRITE_TRAN_CONTINUE;
- }
- /* Fall through */
-
- case TLS_ST_SW_KEY_EXCH:
- if (send_certificate_request(s)) {
- st->hand_state = TLS_ST_SW_CERT_REQ;
- return WRITE_TRAN_CONTINUE;
- }
- /* Fall through */
-
- case TLS_ST_SW_CERT_REQ:
- st->hand_state = TLS_ST_SW_SRVR_DONE;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_SRVR_DONE:
- return WRITE_TRAN_FINISHED;
-
- case TLS_ST_SR_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_OK;
- statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- } else if (s->tlsext_ticket_expected) {
- st->hand_state = TLS_ST_SW_SESSION_TICKET;
- } else {
- st->hand_state = TLS_ST_SW_CHANGE;
- }
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_SESSION_TICKET:
- st->hand_state = TLS_ST_SW_CHANGE;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_CHANGE:
- st->hand_state = TLS_ST_SW_FINISHED;
- return WRITE_TRAN_CONTINUE;
-
- case TLS_ST_SW_FINISHED:
- if (s->hit) {
- return WRITE_TRAN_FINISHED;
- }
- st->hand_state = TLS_ST_OK;
- statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
-
- default:
- /* Shouldn't happen */
- return WRITE_TRAN_ERROR;
- }
-}
-
-/*
- * Perform any pre work that needs to be done prior to sending a message from
- * the server to the client.
- */
-static enum WORK_STATE server_pre_work(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_SW_HELLO_REQ:
- s->shutdown = 0;
- if (SSL_IS_DTLS(s))
- dtls1_clear_record_buffer(s);
- break;
-
- case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
- s->shutdown = 0;
- if (SSL_IS_DTLS(s)) {
- dtls1_clear_record_buffer(s);
- /* We don't buffer this message so don't use the timer */
- st->use_timer = 0;
- }
- break;
-
- case TLS_ST_SW_SRVR_HELLO:
- if (SSL_IS_DTLS(s)) {
- /*
- * Messages we write from now on should be bufferred and
- * retransmitted if necessary, so we need to use the timer now
- */
- st->use_timer = 1;
- }
- break;
-
- case TLS_ST_SW_SRVR_DONE:
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)))
- return dtls_wait_for_dry(s);
-#endif
- return WORK_FINISHED_CONTINUE;
-
- case TLS_ST_SW_SESSION_TICKET:
- if (SSL_IS_DTLS(s)) {
- /*
- * We're into the last flight. We don't retransmit the last flight
- * unless we need to, so we don't use the timer
- */
- st->use_timer = 0;
- }
- break;
-
- case TLS_ST_SW_CHANGE:
- s->session->cipher = s->s3->tmp.new_cipher;
- if (!s->method->ssl3_enc->setup_key_block(s)) {
- statem_set_error(s);
- return WORK_ERROR;
- }
- if (SSL_IS_DTLS(s)) {
- /*
- * We're into the last flight. We don't retransmit the last flight
- * unless we need to, so we don't use the timer. This might have
- * already been set to 0 if we sent a NewSessionTicket message,
- * but we'll set it again here in case we didn't.
- */
- st->use_timer = 0;
- }
- return WORK_FINISHED_CONTINUE;
-
- case TLS_ST_OK:
- return tls_finish_handshake(s, wst);
-
- default:
- /* No pre work to be done */
- break;
- }
-
- return WORK_FINISHED_CONTINUE;
-}
-
-/*
- * Perform any work that needs to be done after sending a message from the
- * server to the client.
- */
-static enum WORK_STATE server_post_work(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- s->init_num = 0;
-
- switch(st->hand_state) {
- case TLS_ST_SW_HELLO_REQ:
- if (statem_flush(s) != 1)
- return WORK_MORE_A;
- ssl3_init_finished_mac(s);
- break;
-
- case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
- if (statem_flush(s) != 1)
- return WORK_MORE_A;
- /* HelloVerifyRequest resets Finished MAC */
- if (s->version != DTLS1_BAD_VER)
- ssl3_init_finished_mac(s);
- /*
- * The next message should be another ClientHello which we need to
- * treat like it was the first packet
- */
- s->first_packet = 1;
- break;
-
- case TLS_ST_SW_SRVR_HELLO:
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && s->hit) {
- unsigned char sctpauthkey[64];
- char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
-
- /*
- * Add new shared key for SCTP-Auth, will be ignored if no
- * SCTP used.
- */
- snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0) <= 0) {
- statem_set_error(s);
- return WORK_ERROR;
- }
-
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
- }
-#endif
- break;
-
- case TLS_ST_SW_CHANGE:
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && !s->hit) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
-#endif
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_SERVER_WRITE)) {
- statem_set_error(s);
- return WORK_ERROR;
- }
-
- if (SSL_IS_DTLS(s))
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- break;
-
- case TLS_ST_SW_SRVR_DONE:
- if (statem_flush(s) != 1)
- return WORK_MORE_A;
- break;
-
- case TLS_ST_SW_FINISHED:
- if (statem_flush(s) != 1)
- return WORK_MORE_A;
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && s->hit) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
-#endif
- break;
-
- default:
- /* No post work to be done */
- break;
- }
-
- return WORK_FINISHED_CONTINUE;
-}
-
-/*
- * Construct a message to be sent from the server to the client.
- *
- * Valid return values are:
- * 1: Success
- * 0: Error
- */
-static int server_construct_message(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
- return dtls_construct_hello_verify_request(s);
-
- case TLS_ST_SW_HELLO_REQ:
- return tls_construct_hello_request(s);
-
- case TLS_ST_SW_SRVR_HELLO:
- return tls_construct_server_hello(s);
-
- case TLS_ST_SW_CERT:
- return tls_construct_server_certificate(s);
-
- case TLS_ST_SW_KEY_EXCH:
- return tls_construct_server_key_exchange(s);
-
- case TLS_ST_SW_CERT_REQ:
- return tls_construct_certificate_request(s);
-
- case TLS_ST_SW_SRVR_DONE:
- return tls_construct_server_done(s);
-
- case TLS_ST_SW_SESSION_TICKET:
- return tls_construct_new_session_ticket(s);
-
- case TLS_ST_SW_CERT_STATUS:
- return tls_construct_cert_status(s);
-
- case TLS_ST_SW_CHANGE:
- if (SSL_IS_DTLS(s))
- return dtls_construct_change_cipher_spec(s);
- else
- return tls_construct_change_cipher_spec(s);
-
- case TLS_ST_SW_FINISHED:
- return tls_construct_finished(s,
- s->method->
- ssl3_enc->server_finished_label,
- s->method->
- ssl3_enc->server_finished_label_len);
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return 0;
-}
-
-#define CLIENT_KEY_EXCH_MAX_LENGTH 2048
-#define NEXT_PROTO_MAX_LENGTH 514
-
-/*
- * Returns the maximum allowed length for the current message that we are
- * reading. Excludes the message header.
- */
-static unsigned long server_max_message_size(SSL *s)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_SR_CLNT_HELLO:
- return SSL3_RT_MAX_PLAIN_LENGTH;
-
- case TLS_ST_SR_CERT:
- return s->max_cert_list;
-
- case TLS_ST_SR_KEY_EXCH:
- return CLIENT_KEY_EXCH_MAX_LENGTH;
-
- case TLS_ST_SR_CERT_VRFY:
- return SSL3_RT_MAX_PLAIN_LENGTH;
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- case TLS_ST_SR_NEXT_PROTO:
- return NEXT_PROTO_MAX_LENGTH;
-#endif
-
- case TLS_ST_SR_CHANGE:
- return CCS_MAX_LENGTH;
-
- case TLS_ST_SR_FINISHED:
- return FINISHED_MAX_LENGTH;
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return 0;
-}
-
-/*
- * Process a message that the server has received from the client.
- */
-static enum MSG_PROCESS_RETURN server_process_message(SSL *s, PACKET *pkt)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_SR_CLNT_HELLO:
- return tls_process_client_hello(s, pkt);
-
- case TLS_ST_SR_CERT:
- return tls_process_client_certificate(s, pkt);
-
- case TLS_ST_SR_KEY_EXCH:
- return tls_process_client_key_exchange(s, pkt);
-
- case TLS_ST_SR_CERT_VRFY:
- return tls_process_cert_verify(s, pkt);
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- case TLS_ST_SR_NEXT_PROTO:
- return tls_process_next_proto(s, pkt);
-#endif
-
- case TLS_ST_SR_CHANGE:
- return tls_process_change_cipher_spec(s, pkt);
-
- case TLS_ST_SR_FINISHED:
- return tls_process_finished(s, pkt);
-
- default:
- /* Shouldn't happen */
- break;
- }
-
- return MSG_PROCESS_ERROR;
-}
-
-/*
- * Perform any further processing required following the receipt of a message
- * from the client
- */
-static enum WORK_STATE server_post_process_message(SSL *s, enum WORK_STATE wst)
-{
- STATEM *st = &s->statem;
-
- switch(st->hand_state) {
- case TLS_ST_SR_CLNT_HELLO:
- return tls_post_process_client_hello(s, wst);
-
- case TLS_ST_SR_KEY_EXCH:
- return tls_post_process_client_key_exchange(s, wst);
-
- case TLS_ST_SR_CERT_VRFY:
-#ifndef OPENSSL_NO_SCTP
- if ( /* Is this SCTP? */
- BIO_dgram_is_sctp(SSL_get_wbio(s))
- /* Are we renegotiating? */
- && s->renegotiate
- && BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- statem_set_sctp_read_sock(s, 1);
- return WORK_MORE_A;
- } else {
- statem_set_sctp_read_sock(s, 0);
- }
-#endif
- return WORK_FINISHED_CONTINUE;
-
-
- case TLS_ST_SR_FINISHED:
- if (s->hit)
- return tls_finish_handshake(s, wst);
- else
- return WORK_FINISHED_STOP;
- default:
- break;
- }
-
- /* Shouldn't happen */
- return WORK_ERROR;
-}
--- /dev/null
+/* ssl/statem/statem.c */
+/*
+ * Written by Matt Caswell for the OpenSSL project.
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <openssl/rand.h>
+#include "../ssl_locl.h"
+
+/*
+ * This file implements the SSL/TLS/DTLS state machines.
+ *
+ * There are two primary state machines:
+ *
+ * 1) Message flow state machine
+ * 2) Handshake state machine
+ *
+ * The Message flow state machine controls the reading and sending of messages
+ * including handling of non-blocking IO events, flushing of the underlying
+ * write BIO, handling unexpected messages, etc. It is itself broken into two
+ * separate sub-state machines which control reading and writing respectively.
+ *
+ * The Handshake state machine keeps track of the current SSL/TLS handshake
+ * state. Transitions of the handshake state are the result of events that
+ * occur within the Message flow state machine.
+ *
+ * Overall it looks like this:
+ *
+ * --------------------------------------------- -------------------
+ * | | | |
+ * | Message flow state machine | | |
+ * | | | |
+ * | -------------------- -------------------- | Transition | Handshake state |
+ * | | MSG_FLOW_READING | | MSG_FLOW_WRITING | | Event | machine |
+ * | | sub-state | | sub-state | |----------->| |
+ * | | machine for | | machine for | | | |
+ * | | reading messages | | writing messages | | | |
+ * | -------------------- -------------------- | | |
+ * | | | |
+ * --------------------------------------------- -------------------
+ *
+ */
+
+/* Sub state machine return values */
+enum SUB_STATE_RETURN {
+ /* Something bad happened or NBIO */
+ SUB_STATE_ERROR,
+ /* Sub state finished go to the next sub state */
+ SUB_STATE_FINISHED,
+ /* Sub state finished and handshake was completed */
+ SUB_STATE_END_HANDSHAKE
+};
+
+static int state_machine(SSL *s, int server);
+static void init_read_state_machine(SSL *s);
+static enum SUB_STATE_RETURN read_state_machine(SSL *s);
+static void init_write_state_machine(SSL *s);
+static enum SUB_STATE_RETURN write_state_machine(SSL *s);
+static inline int cert_req_allowed(SSL *s);
+static inline int key_exchange_skip_allowed(SSL *s);
+static int client_read_transition(SSL *s, int mt);
+static enum WRITE_TRAN client_write_transition(SSL *s);
+static enum WORK_STATE client_pre_work(SSL *s, enum WORK_STATE wst);
+static enum WORK_STATE client_post_work(SSL *s, enum WORK_STATE wst);
+static int client_construct_message(SSL *s);
+static unsigned long client_max_message_size(SSL *s);
+static enum MSG_PROCESS_RETURN client_process_message(SSL *s, PACKET *pkt);
+static enum WORK_STATE client_post_process_message(SSL *s, enum WORK_STATE wst);
+static int server_read_transition(SSL *s, int mt);
+static inline int send_server_key_exchange(SSL *s);
+static inline int send_certificate_request(SSL *s);
+static enum WRITE_TRAN server_write_transition(SSL *s);
+static enum WORK_STATE server_pre_work(SSL *s, enum WORK_STATE wst);
+static enum WORK_STATE server_post_work(SSL *s, enum WORK_STATE wst);
+static int server_construct_message(SSL *s);
+static unsigned long server_max_message_size(SSL *s);
+static enum MSG_PROCESS_RETURN server_process_message(SSL *s, PACKET *pkt);
+static enum WORK_STATE server_post_process_message(SSL *s, enum WORK_STATE wst);
+
+
+enum HANDSHAKE_STATE SSL_state(const SSL *ssl)
+{
+ return ssl->statem.hand_state;
+}
+
+void SSL_set_state(SSL *ssl, enum HANDSHAKE_STATE state)
+{
+ /*
+ * This function seems like a really bad idea. Should we remove it
+ * completely?
+ */
+ ssl->statem.hand_state = state;
+}
+
+int SSL_in_init(SSL *s)
+{
+ return s->statem.in_init;
+}
+
+int SSL_is_init_finished(SSL *s)
+{
+ return !(s->statem.in_init) && (s->statem.hand_state == TLS_ST_OK);
+}
+
+int SSL_in_before(SSL *s)
+{
+ /*
+ * Historically being "in before" meant before anything had happened. In the
+ * current code though we remain in the "before" state for a while after we
+ * have started the handshake process (e.g. as a server waiting for the
+ * first message to arrive). There "in before" is taken to mean "in before"
+ * and not started any handshake process yet.
+ */
+ return (s->statem.hand_state == TLS_ST_BEFORE)
+ && (s->statem.state == MSG_FLOW_UNINITED);
+}
+
+/*
+ * Clear the state machine state and reset back to MSG_FLOW_UNINITED
+ */
+void statem_clear(SSL *s)
+{
+ s->statem.state = MSG_FLOW_UNINITED;
+ s->statem.hand_state = TLS_ST_BEFORE;
+ s->statem.in_init = 1;
+}
+
+/*
+ * Set the state machine up ready for a renegotiation handshake
+ */
+void statem_set_renegotiate(SSL *s)
+{
+ s->statem.state = MSG_FLOW_RENEGOTIATE;
+ s->statem.in_init = 1;
+}
+
+/*
+ * Put the state machine into an error state. This is a permanent error for
+ * the current connection.
+ */
+void statem_set_error(SSL *s)
+{
+ s->statem.state = MSG_FLOW_ERROR;
+}
+
+/*
+ * Discover whether the current connection is in the error state.
+ *
+ * Valid return values are:
+ * 1: Yes
+ * 0: No
+ */
+int statem_in_error(const SSL *s)
+{
+ if (s->statem.state == MSG_FLOW_ERROR)
+ return 1;
+
+ return 0;
+}
+
+void statem_set_in_init(SSL *s, int init)
+{
+ s->statem.in_init = init;
+}
+
+int statem_connect(SSL *s) {
+ return state_machine(s, 0);
+}
+
+int statem_accept(SSL *s)
+{
+ return state_machine(s, 1);
+}
+
+/*
+ * The main message flow state machine. We start in the MSG_FLOW_UNINITED or
+ * MSG_FLOW_RENEGOTIATE state and finish in MSG_FLOW_FINISHED. Valid states and
+ * transitions are as follows:
+ *
+ * MSG_FLOW_UNINITED MSG_FLOW_RENEGOTIATE
+ * | |
+ * +-----------------------+
+ * v
+ * MSG_FLOW_WRITING <---> MSG_FLOW_READING
+ * |
+ * V
+ * MSG_FLOW_FINISHED
+ * |
+ * V
+ * [SUCCESS]
+ *
+ * We may exit at any point due to an error or NBIO event. If an NBIO event
+ * occurs then we restart at the point we left off when we are recalled.
+ * MSG_FLOW_WRITING and MSG_FLOW_READING have sub-state machines associated with them.
+ *
+ * In addition to the above there is also the MSG_FLOW_ERROR state. We can move
+ * into that state at any point in the event that an irrecoverable error occurs.
+ *
+ * Valid return values are:
+ * 1: Success
+ * <=0: NBIO or error
+ */
+static int state_machine(SSL *s, int server) {
+ BUF_MEM *buf = NULL;
+ unsigned long Time = (unsigned long)time(NULL);
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+ STATEM *st = &s->statem;
+ int ret = -1;
+ int ssret;
+
+ if (st->state == MSG_FLOW_ERROR) {
+ /* Shouldn't have been called if we're already in the error state */
+ return -1;
+ }
+
+ RAND_add(&Time, sizeof(Time), 0);
+ ERR_clear_error();
+ clear_sys_error();
+
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+
+ s->in_handshake++;
+ if (!SSL_in_init(s) || SSL_in_before(s)) {
+ if (!SSL_clear(s))
+ return -1;
+ }
+
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * Notify SCTP BIO socket to enter handshake mode and prevent stream
+ * identifier other than 0. Will be ignored if no SCTP is used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
+ s->in_handshake, NULL);
+ }
+#endif
+
+#ifndef OPENSSL_NO_HEARTBEATS
+ /*
+ * If we're awaiting a HeartbeatResponse, pretend we already got and
+ * don't await it anymore, because Heartbeats don't make sense during
+ * handshakes anyway.
+ */
+ if (s->tlsext_hb_pending) {
+ if (SSL_IS_DTLS(s))
+ dtls1_stop_timer(s);
+ s->tlsext_hb_pending = 0;
+ s->tlsext_hb_seq++;
+ }
+#endif
+
+ /* Initialise state machine */
+
+ if (st->state == MSG_FLOW_RENEGOTIATE) {
+ s->renegotiate = 1;
+ if (!server)
+ s->ctx->stats.sess_connect_renegotiate++;
+ }
+
+ if (st->state == MSG_FLOW_UNINITED || st->state == MSG_FLOW_RENEGOTIATE) {
+ if (st->state == MSG_FLOW_UNINITED) {
+ st->hand_state = TLS_ST_BEFORE;
+ }
+
+ s->server = server;
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_START, 1);
+
+ if (SSL_IS_DTLS(s)) {
+ if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
+ (server
+ || (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00))) {
+ SSLerr(SSL_F_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
+ goto end;
+ }
+ } else {
+ if ((s->version >> 8) != SSL3_VERSION_MAJOR
+ && s->version != TLS_ANY_VERSION) {
+ SSLerr(SSL_F_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
+ goto end;
+ }
+ }
+
+ if (!SSL_IS_DTLS(s)) {
+ if (s->version != TLS_ANY_VERSION &&
+ !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
+ SSLerr(SSL_F_STATE_MACHINE, SSL_R_VERSION_TOO_LOW);
+ goto end;
+ }
+ }
+
+ if (s->init_buf == NULL) {
+ if ((buf = BUF_MEM_new()) == NULL) {
+ goto end;
+ }
+ if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
+ goto end;
+ }
+ s->init_buf = buf;
+ buf = NULL;
+ }
+
+ if (!ssl3_setup_buffers(s)) {
+ goto end;
+ }
+ s->init_num = 0;
+
+ /*
+ * Should have been reset by tls_process_finished, too.
+ */
+ s->s3->change_cipher_spec = 0;
+
+ if (!server || st->state != MSG_FLOW_RENEGOTIATE) {
+ /*
+ * Ok, we now need to push on a buffering BIO ...but not with
+ * SCTP
+ */
+#ifndef OPENSSL_NO_SCTP
+ if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s)))
+#endif
+ if (!ssl_init_wbio_buffer(s, server ? 1 : 0)) {
+ goto end;
+ }
+
+ ssl3_init_finished_mac(s);
+ }
+
+ if (server) {
+ if (st->state != MSG_FLOW_RENEGOTIATE) {
+ s->ctx->stats.sess_accept++;
+ } else if (!s->s3->send_connection_binding &&
+ !(s->options &
+ SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
+ /*
+ * Server attempting to renegotiate with client that doesn't
+ * support secure renegotiation.
+ */
+ SSLerr(SSL_F_STATE_MACHINE,
+ SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ statem_set_error(s);
+ goto end;
+ } else {
+ /*
+ * s->state == SSL_ST_RENEGOTIATE, we will just send a
+ * HelloRequest
+ */
+ s->ctx->stats.sess_accept_renegotiate++;
+ }
+ } else {
+ s->ctx->stats.sess_connect++;
+
+ /* mark client_random uninitialized */
+ memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
+ s->hit = 0;
+
+ s->s3->tmp.cert_request = 0;
+
+ if (SSL_IS_DTLS(s)) {
+ st->use_timer = 1;
+ }
+ }
+
+ st->state = MSG_FLOW_WRITING;
+ init_write_state_machine(s);
+ st->read_state_first_init = 1;
+ }
+
+ while(st->state != MSG_FLOW_FINISHED) {
+ if(st->state == MSG_FLOW_READING) {
+ ssret = read_state_machine(s);
+ if (ssret == SUB_STATE_FINISHED) {
+ st->state = MSG_FLOW_WRITING;
+ init_write_state_machine(s);
+ } else {
+ /* NBIO or error */
+ goto end;
+ }
+ } else if (st->state == MSG_FLOW_WRITING) {
+ ssret = write_state_machine(s);
+ if (ssret == SUB_STATE_FINISHED) {
+ st->state = MSG_FLOW_READING;
+ init_read_state_machine(s);
+ } else if (ssret == SUB_STATE_END_HANDSHAKE) {
+ st->state = MSG_FLOW_FINISHED;
+ } else {
+ /* NBIO or error */
+ goto end;
+ }
+ } else {
+ /* Error */
+ statem_set_error(s);
+ goto end;
+ }
+ }
+
+ st->state = MSG_FLOW_UNINITED;
+ ret = 1;
+
+ end:
+ s->in_handshake--;
+
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * Notify SCTP BIO socket to leave handshake mode and allow stream
+ * identifier other than 0. Will be ignored if no SCTP is used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
+ s->in_handshake, NULL);
+ }
+#endif
+
+ BUF_MEM_free(buf);
+ if (cb != NULL) {
+ if (server)
+ cb(s, SSL_CB_ACCEPT_EXIT, ret);
+ else
+ cb(s, SSL_CB_CONNECT_EXIT, ret);
+ }
+ return ret;
+}
+
+/*
+ * Initialise the MSG_FLOW_READING sub-state machine
+ */
+static void init_read_state_machine(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ st->read_state = READ_STATE_HEADER;
+}
+
+/*
+ * This function implements the sub-state machine when the message flow is in
+ * MSG_FLOW_READING. The valid sub-states and transitions are:
+ *
+ * READ_STATE_HEADER <--+<-------------+
+ * | | |
+ * v | |
+ * READ_STATE_BODY -----+-->READ_STATE_POST_PROCESS
+ * | |
+ * +----------------------------+
+ * v
+ * [SUB_STATE_FINISHED]
+ *
+ * READ_STATE_HEADER has the responsibility for reading in the message header
+ * and transitioning the state of the handshake state machine.
+ *
+ * READ_STATE_BODY reads in the rest of the message and then subsequently
+ * processes it.
+ *
+ * READ_STATE_POST_PROCESS is an optional step that may occur if some post
+ * processing activity performed on the message may block.
+ *
+ * Any of the above states could result in an NBIO event occuring in which case
+ * control returns to the calling application. When this function is recalled we
+ * will resume in the same state where we left off.
+ */
+static enum SUB_STATE_RETURN read_state_machine(SSL *s) {
+ STATEM *st = &s->statem;
+ int ret, mt;
+ unsigned long len;
+ int (*transition)(SSL *s, int mt);
+ PACKET pkt;
+ enum MSG_PROCESS_RETURN (*process_message)(SSL *s, PACKET *pkt);
+ enum WORK_STATE (*post_process_message)(SSL *s, enum WORK_STATE wst);
+ unsigned long (*max_message_size)(SSL *s);
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+
+ if(s->server) {
+ transition = server_read_transition;
+ process_message = server_process_message;
+ max_message_size = server_max_message_size;
+ post_process_message = server_post_process_message;
+ } else {
+ transition = client_read_transition;
+ process_message = client_process_message;
+ max_message_size = client_max_message_size;
+ post_process_message = client_post_process_message;
+ }
+
+ if (st->read_state_first_init) {
+ s->first_packet = 1;
+ st->read_state_first_init = 0;
+ }
+
+ while(1) {
+ switch(st->read_state) {
+ case READ_STATE_HEADER:
+ s->init_num = 0;
+ /* Get the state the peer wants to move to */
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * In DTLS we get the whole message in one go - header and body
+ */
+ ret = dtls_get_message(s, &mt, &len);
+ } else {
+ ret = tls_get_message_header(s, &mt);
+ }
+
+ if (ret == 0) {
+ /* Could be non-blocking IO */
+ return SUB_STATE_ERROR;
+ }
+
+ if (cb != NULL) {
+ /* Notify callback of an impending state change */
+ if (s->server)
+ cb(s, SSL_CB_ACCEPT_LOOP, 1);
+ else
+ cb(s, SSL_CB_CONNECT_LOOP, 1);
+ }
+ /*
+ * Validate that we are allowed to move to the new state and move
+ * to that state if so
+ */
+ if(!transition(s, mt)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
+ SSLerr(SSL_F_READ_STATE_MACHINE, SSL_R_UNEXPECTED_MESSAGE);
+ return SUB_STATE_ERROR;
+ }
+
+ if (s->s3->tmp.message_size > max_message_size(s)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
+ SSLerr(SSL_F_READ_STATE_MACHINE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
+ return SUB_STATE_ERROR;
+ }
+
+ st->read_state = READ_STATE_BODY;
+ /* Fall through */
+
+ case READ_STATE_BODY:
+ if (!SSL_IS_DTLS(s)) {
+ /* We already got this above for DTLS */
+ ret = tls_get_message_body(s, &len);
+ if (ret == 0) {
+ /* Could be non-blocking IO */
+ return SUB_STATE_ERROR;
+ }
+ }
+
+ s->first_packet = 0;
+ if (!PACKET_buf_init(&pkt, s->init_msg, len)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_READ_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
+ return SUB_STATE_ERROR;
+ }
+ ret = process_message(s, &pkt);
+ if (ret == MSG_PROCESS_ERROR) {
+ return SUB_STATE_ERROR;
+ }
+
+ if (ret == MSG_PROCESS_FINISHED_READING) {
+ if (SSL_IS_DTLS(s)) {
+ dtls1_stop_timer(s);
+ }
+ return SUB_STATE_FINISHED;
+ }
+
+ if (ret == MSG_PROCESS_CONTINUE_PROCESSING) {
+ st->read_state = READ_STATE_POST_PROCESS;
+ st->read_state_work = WORK_MORE_A;
+ } else {
+ st->read_state = READ_STATE_HEADER;
+ }
+ break;
+
+ case READ_STATE_POST_PROCESS:
+ st->read_state_work = post_process_message(s, st->read_state_work);
+ switch(st->read_state_work) {
+ default:
+ return SUB_STATE_ERROR;
+
+ case WORK_FINISHED_CONTINUE:
+ st->read_state = READ_STATE_HEADER;
+ break;
+
+ case WORK_FINISHED_STOP:
+ if (SSL_IS_DTLS(s)) {
+ dtls1_stop_timer(s);
+ }
+ return SUB_STATE_FINISHED;
+ }
+ break;
+
+ default:
+ /* Shouldn't happen */
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_READ_STATE_MACHINE, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return SUB_STATE_ERROR;
+ }
+ }
+}
+
+/*
+ * Send a previously constructed message to the peer.
+ */
+static int statem_do_write(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ if (st->hand_state == TLS_ST_CW_CHANGE
+ || st->hand_state == TLS_ST_SW_CHANGE) {
+ if (SSL_IS_DTLS(s))
+ return dtls1_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
+ else
+ return ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
+ } else {
+ return ssl_do_write(s);
+ }
+}
+
+/*
+ * Initialise the MSG_FLOW_WRITING sub-state machine
+ */
+static void init_write_state_machine(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ st->write_state = WRITE_STATE_TRANSITION;
+}
+
+/*
+ * This function implements the sub-state machine when the message flow is in
+ * MSG_FLOW_WRITING. The valid sub-states and transitions are:
+ *
+ * +-> WRITE_STATE_TRANSITION ------> [SUB_STATE_FINISHED]
+ * | |
+ * | v
+ * | WRITE_STATE_PRE_WORK -----> [SUB_STATE_END_HANDSHAKE]
+ * | |
+ * | v
+ * | WRITE_STATE_SEND
+ * | |
+ * | v
+ * | WRITE_STATE_POST_WORK
+ * | |
+ * +-------------+
+ *
+ * WRITE_STATE_TRANSITION transitions the state of the handshake state machine
+
+ * WRITE_STATE_PRE_WORK performs any work necessary to prepare the later
+ * sending of the message. This could result in an NBIO event occuring in
+ * which case control returns to the calling application. When this function
+ * is recalled we will resume in the same state where we left off.
+ *
+ * WRITE_STATE_SEND sends the message and performs any work to be done after
+ * sending.
+ *
+ * WRITE_STATE_POST_WORK performs any work necessary after the sending of the
+ * message has been completed. As for WRITE_STATE_PRE_WORK this could also
+ * result in an NBIO event.
+ */
+static enum SUB_STATE_RETURN write_state_machine(SSL *s)
+{
+ STATEM *st = &s->statem;
+ int ret;
+ enum WRITE_TRAN (*transition)(SSL *s);
+ enum WORK_STATE (*pre_work)(SSL *s, enum WORK_STATE wst);
+ enum WORK_STATE (*post_work)(SSL *s, enum WORK_STATE wst);
+ int (*construct_message)(SSL *s);
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+
+ if(s->server) {
+ transition = server_write_transition;
+ pre_work = server_pre_work;
+ post_work = server_post_work;
+ construct_message = server_construct_message;
+ } else {
+ transition = client_write_transition;
+ pre_work = client_pre_work;
+ post_work = client_post_work;
+ construct_message = client_construct_message;
+ }
+
+ while(1) {
+ switch(st->write_state) {
+ case WRITE_STATE_TRANSITION:
+ if (cb != NULL) {
+ /* Notify callback of an impending state change */
+ if (s->server)
+ cb(s, SSL_CB_ACCEPT_LOOP, 1);
+ else
+ cb(s, SSL_CB_CONNECT_LOOP, 1);
+ }
+ switch(transition(s)) {
+ case WRITE_TRAN_CONTINUE:
+ st->write_state = WRITE_STATE_PRE_WORK;
+ st->write_state_work = WORK_MORE_A;
+ break;
+
+ case WRITE_TRAN_FINISHED:
+ return SUB_STATE_FINISHED;
+ break;
+
+ default:
+ return SUB_STATE_ERROR;
+ }
+ break;
+
+ case WRITE_STATE_PRE_WORK:
+ switch(st->write_state_work = pre_work(s, st->write_state_work)) {
+ default:
+ return SUB_STATE_ERROR;
+
+ case WORK_FINISHED_CONTINUE:
+ st->write_state = WRITE_STATE_SEND;
+ break;
+
+ case WORK_FINISHED_STOP:
+ return SUB_STATE_END_HANDSHAKE;
+ }
+ if(construct_message(s) == 0)
+ return SUB_STATE_ERROR;
+
+ /* Fall through */
+
+ case WRITE_STATE_SEND:
+ if (SSL_IS_DTLS(s) && st->use_timer) {
+ dtls1_start_timer(s);
+ }
+ ret = statem_do_write(s);
+ if (ret <= 0) {
+ return SUB_STATE_ERROR;
+ }
+ st->write_state = WRITE_STATE_POST_WORK;
+ st->write_state_work = WORK_MORE_A;
+ /* Fall through */
+
+ case WRITE_STATE_POST_WORK:
+ switch(st->write_state_work = post_work(s, st->write_state_work)) {
+ default:
+ return SUB_STATE_ERROR;
+
+ case WORK_FINISHED_CONTINUE:
+ st->write_state = WRITE_STATE_TRANSITION;
+ break;
+
+ case WORK_FINISHED_STOP:
+ return SUB_STATE_END_HANDSHAKE;
+ }
+ break;
+
+ default:
+ return SUB_STATE_ERROR;
+ }
+ }
+}
+
+/*
+ * Flush the write BIO
+ */
+static int statem_flush(SSL *s)
+{
+ s->rwstate = SSL_WRITING;
+ if (BIO_flush(s->wbio) <= 0) {
+ return 0;
+ }
+ s->rwstate = SSL_NOTHING;
+
+ return 1;
+}
+
+/*
+ * Called by the record layer to determine whether application data is
+ * allowed to be sent in the current handshake state or not.
+ *
+ * Return values are:
+ * 1: Yes (application data allowed)
+ * 0: No (application data not allowed)
+ */
+int statem_app_data_allowed(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ if (st->state == MSG_FLOW_UNINITED || st->state == MSG_FLOW_RENEGOTIATE)
+ return 0;
+
+ if (!s->s3->in_read_app_data || (s->s3->total_renegotiations == 0))
+ return 0;
+
+ if (s->server) {
+ /*
+ * If we're a server and we haven't got as far as writing our
+ * ServerHello yet then we allow app data
+ */
+ if (st->hand_state == TLS_ST_BEFORE
+ || st->hand_state == TLS_ST_SR_CLNT_HELLO)
+ return 1;
+ } else {
+ /*
+ * If we're a client and we haven't read the ServerHello yet then we
+ * allow app data
+ */
+ if (st->hand_state == TLS_ST_CW_CLNT_HELLO)
+ return 1;
+ }
+
+ return 0;
+}
+
+
+#ifndef OPENSSL_NO_SCTP
+/*
+ * Set flag used by SCTP to determine whether we are in the read sock state
+ */
+void statem_set_sctp_read_sock(SSL *s, int read_sock)
+{
+ s->statem.in_sctp_read_sock = read_sock;
+}
+
+/*
+ * Called by the record layer to determine whether we are in the read sock
+ * state or not.
+ *
+ * Return values are:
+ * 1: Yes (we are in the read sock state)
+ * 0: No (we are not in the read sock state)
+ */
+int statem_in_sctp_read_sock(SSL *s)
+{
+ return s->statem.in_sctp_read_sock;
+}
+#endif
+
+/*
+ * Is a CertificateRequest message allowed at the moment or not?
+ *
+ * Return values are:
+ * 1: Yes
+ * 0: No
+ */
+static inline int cert_req_allowed(SSL *s)
+{
+ /* TLS does not like anon-DH with client cert */
+ if (s->version > SSL3_VERSION
+ && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Are we allowed to skip the ServerKeyExchange message?
+ *
+ * Return values are:
+ * 1: Yes
+ * 0: No
+ */
+static inline int key_exchange_skip_allowed(SSL *s)
+{
+ long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ /*
+ * Can't skip server key exchange if this is an ephemeral
+ * ciphersuite.
+ */
+ if (alg_k & (SSL_kDHE | SSL_kECDHE)) {
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * client_read_transition() encapsulates the logic for the allowed handshake
+ * state transitions when the client is reading messages from the server. The
+ * message type that the server has sent is provided in |mt|. The current state
+ * is in |s->statem.hand_state|.
+ *
+ * Return values are:
+ * 1: Success (transition allowed)
+ * 0: Error (transition not allowed)
+ */
+static int client_read_transition(SSL *s, int mt)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_CW_CLNT_HELLO:
+ if (mt == SSL3_MT_SERVER_HELLO) {
+ st->hand_state = TLS_ST_CR_SRVR_HELLO;
+ return 1;
+ }
+
+ if (SSL_IS_DTLS(s)) {
+ if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
+ st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_CR_SRVR_HELLO:
+ if (s->hit) {
+ if (s->tlsext_ticket_expected) {
+ if (mt == SSL3_MT_NEWSESSION_TICKET) {
+ st->hand_state = TLS_ST_CR_SESSION_TICKET;
+ return 1;
+ }
+ } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ st->hand_state = TLS_ST_CR_CHANGE;
+ return 1;
+ }
+ } else {
+ if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
+ st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
+ return 1;
+ } else if (!(s->s3->tmp.new_cipher->algorithm_auth
+ & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_CR_CERT;
+ return 1;
+ }
+ } else {
+ if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
+ st->hand_state = TLS_ST_CR_KEY_EXCH;
+ return 1;
+ } else if (key_exchange_skip_allowed(s)) {
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST
+ && cert_req_allowed(s)) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ } else if (mt == SSL3_MT_SERVER_DONE) {
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
+ }
+ }
+ }
+ }
+ break;
+
+ case TLS_ST_CR_CERT:
+ if (s->tlsext_status_expected) {
+ if (mt == SSL3_MT_CERTIFICATE_STATUS) {
+ st->hand_state = TLS_ST_CR_CERT_STATUS;
+ return 1;
+ }
+ } else {
+ if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
+ st->hand_state = TLS_ST_CR_KEY_EXCH;
+ return 1;
+ } else if (key_exchange_skip_allowed(s)) {
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ } else if (mt == SSL3_MT_SERVER_DONE) {
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
+ }
+ }
+ }
+ break;
+
+ case TLS_ST_CR_CERT_STATUS:
+ if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
+ st->hand_state = TLS_ST_CR_KEY_EXCH;
+ return 1;
+ } else if (key_exchange_skip_allowed(s)) {
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ } else if (mt == SSL3_MT_SERVER_DONE) {
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_CR_KEY_EXCH:
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST && cert_req_allowed(s)) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ } else if (mt == SSL3_MT_SERVER_DONE) {
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_CERT_REQ:
+ if (mt == SSL3_MT_SERVER_DONE) {
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CW_FINISHED:
+ if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
+ st->hand_state = TLS_ST_CR_SESSION_TICKET;
+ return 1;
+ } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ st->hand_state = TLS_ST_CR_CHANGE;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_SESSION_TICKET:
+ if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ st->hand_state = TLS_ST_CR_CHANGE;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_CHANGE:
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_CR_FINISHED;
+ return 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ /* No valid transition found */
+ return 0;
+}
+
+/*
+ * client_write_transition() works out what handshake state to move to next
+ * when the client is writing messages to be sent to the server.
+ */
+static enum WRITE_TRAN client_write_transition(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_OK:
+ /* Renegotiation - fall through */
+ case TLS_ST_BEFORE:
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CLNT_HELLO:
+ /*
+ * No transition at the end of writing because we don't know what
+ * we will be sent
+ */
+ return WRITE_TRAN_FINISHED;
+
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CR_SRVR_DONE:
+ if (s->s3->tmp.cert_req)
+ st->hand_state = TLS_ST_CW_CERT;
+ else
+ st->hand_state = TLS_ST_CW_KEY_EXCH;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT:
+ st->hand_state = TLS_ST_CW_KEY_EXCH;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_KEY_EXCH:
+ /*
+ * For TLS, cert_req is set to 2, so a cert chain of nothing is
+ * sent, but no verify packet is sent
+ */
+ /*
+ * XXX: For now, we do not support client authentication in ECDH
+ * cipher suites with ECDH (rather than ECDSA) certificates. We
+ * need to skip the certificate verify message when client's
+ * ECDH public key is sent inside the client certificate.
+ */
+ if (s->s3->tmp.cert_req == 1) {
+ st->hand_state = TLS_ST_CW_CERT_VRFY;
+ } else {
+ st->hand_state = TLS_ST_CW_CHANGE;
+ }
+ if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
+ st->hand_state = TLS_ST_CW_CHANGE;
+ }
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT_VRFY:
+ st->hand_state = TLS_ST_CW_CHANGE;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CHANGE:
+#if defined(OPENSSL_NO_NEXTPROTONEG)
+ st->hand_state = TLS_ST_CW_FINISHED;
+#else
+ if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
+ st->hand_state = TLS_ST_CW_NEXT_PROTO;
+ else
+ st->hand_state = TLS_ST_CW_FINISHED;
+#endif
+ return WRITE_TRAN_CONTINUE;
+
+#if !defined(OPENSSL_NO_NEXTPROTONEG)
+ case TLS_ST_CW_NEXT_PROTO:
+ st->hand_state = TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+#endif
+
+ case TLS_ST_CW_FINISHED:
+ if (s->hit) {
+ st->hand_state = TLS_ST_OK;
+ statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+ } else {
+ return WRITE_TRAN_FINISHED;
+ }
+
+ case TLS_ST_CR_FINISHED:
+ if (s->hit) {
+ st->hand_state = TLS_ST_CW_CHANGE;
+ return WRITE_TRAN_CONTINUE;
+ } else {
+ st->hand_state = TLS_ST_OK;
+ statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+ }
+
+ default:
+ /* Shouldn't happen */
+ return WRITE_TRAN_ERROR;
+ }
+}
+
+/*
+ * Perform any pre work that needs to be done prior to sending a message from
+ * the client to the server.
+ */
+static enum WORK_STATE client_pre_work(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_CW_CLNT_HELLO:
+ s->shutdown = 0;
+ if (SSL_IS_DTLS(s)) {
+ /* every DTLS ClientHello resets Finished MAC */
+ ssl3_init_finished_mac(s);
+ }
+ break;
+
+ case TLS_ST_CW_CERT:
+ return tls_prepare_client_certificate(s, wst);
+
+ case TLS_ST_CW_CHANGE:
+ if (SSL_IS_DTLS(s)) {
+ if (s->hit) {
+ /*
+ * We're into the last flight so we don't retransmit these
+ * messages unless we need to.
+ */
+ st->use_timer = 0;
+ }
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ return dtls_wait_for_dry(s);
+#endif
+ }
+ return WORK_FINISHED_CONTINUE;
+
+ case TLS_ST_OK:
+ return tls_finish_handshake(s, wst);
+
+ default:
+ /* No pre work to be done */
+ break;
+ }
+
+ return WORK_FINISHED_CONTINUE;
+}
+
+/*
+ * Perform any work that needs to be done after sending a message from the
+ * client to the server.
+ */
+static enum WORK_STATE client_post_work(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ s->init_num = 0;
+
+ switch(st->hand_state) {
+ case TLS_ST_CW_CLNT_HELLO:
+ if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
+ return WORK_MORE_A;
+#ifndef OPENSSL_NO_SCTP
+ /* Disable buffering for SCTP */
+ if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
+#endif
+ /*
+ * turn on buffering for the next lot of output
+ */
+ if (s->bbio != s->wbio)
+ s->wbio = BIO_push(s->bbio, s->wbio);
+#ifndef OPENSSL_NO_SCTP
+ }
+#endif
+ if (SSL_IS_DTLS(s)) {
+ /* Treat the next message as the first packet */
+ s->first_packet = 1;
+ }
+ break;
+
+ case TLS_ST_CW_KEY_EXCH:
+ if (tls_client_key_exchange_post_work(s) == 0)
+ return WORK_ERROR;
+ break;
+
+ case TLS_ST_CW_CHANGE:
+ s->session->cipher = s->s3->tmp.new_cipher;
+#ifdef OPENSSL_NO_COMP
+ s->session->compress_meth = 0;
+#else
+ if (s->s3->tmp.new_compression == NULL)
+ s->session->compress_meth = 0;
+ else
+ s->session->compress_meth = s->s3->tmp.new_compression->id;
+#endif
+ if (!s->method->ssl3_enc->setup_key_block(s))
+ return WORK_ERROR;
+
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CHANGE_CIPHER_CLIENT_WRITE))
+ return WORK_ERROR;
+
+ if (SSL_IS_DTLS(s)) {
+#ifndef OPENSSL_NO_SCTP
+ if (s->hit) {
+ /*
+ * Change to new shared key of SCTP-Auth, will be ignored if
+ * no SCTP used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
+ 0, NULL);
+ }
+#endif
+
+ dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
+ }
+ break;
+
+ case TLS_ST_CW_FINISHED:
+#ifndef OPENSSL_NO_SCTP
+ if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
+ /*
+ * Change to new shared key of SCTP-Auth, will be ignored if
+ * no SCTP used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
+ 0, NULL);
+ }
+#endif
+ if (statem_flush(s) != 1)
+ return WORK_MORE_B;
+
+ if (s->hit && tls_finish_handshake(s, WORK_MORE_A) != 1)
+ return WORK_ERROR;
+ break;
+
+ default:
+ /* No post work to be done */
+ break;
+ }
+
+ return WORK_FINISHED_CONTINUE;
+}
+
+/*
+ * Construct a message to be sent from the client to the server.
+ *
+ * Valid return values are:
+ * 1: Success
+ * 0: Error
+ */
+static int client_construct_message(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_CW_CLNT_HELLO:
+ return tls_construct_client_hello(s);
+
+ case TLS_ST_CW_CERT:
+ return tls_construct_client_certificate(s);
+
+ case TLS_ST_CW_KEY_EXCH:
+ return tls_construct_client_key_exchange(s);
+
+ case TLS_ST_CW_CERT_VRFY:
+ return tls_construct_client_verify(s);
+
+ case TLS_ST_CW_CHANGE:
+ if (SSL_IS_DTLS(s))
+ return dtls_construct_change_cipher_spec(s);
+ else
+ return tls_construct_change_cipher_spec(s);
+
+#if !defined(OPENSSL_NO_NEXTPROTONEG)
+ case TLS_ST_CW_NEXT_PROTO:
+ return tls_construct_next_proto(s);
+#endif
+ case TLS_ST_CW_FINISHED:
+ return tls_construct_finished(s,
+ s->method->
+ ssl3_enc->client_finished_label,
+ s->method->
+ ssl3_enc->client_finished_label_len);
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return 0;
+}
+
+/* The spec allows for a longer length than this, but we limit it */
+#define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
+#define SERVER_HELLO_MAX_LENGTH 20000
+#define SERVER_KEY_EXCH_MAX_LENGTH 102400
+#define SERVER_HELLO_DONE_MAX_LENGTH 0
+#define CCS_MAX_LENGTH 1
+/* Max should actually be 36 but we are generous */
+#define FINISHED_MAX_LENGTH 64
+
+/*
+ * Returns the maximum allowed length for the current message that we are
+ * reading. Excludes the message header.
+ */
+static unsigned long client_max_message_size(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_CR_SRVR_HELLO:
+ return SERVER_HELLO_MAX_LENGTH;
+
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ return HELLO_VERIFY_REQUEST_MAX_LENGTH;
+
+ case TLS_ST_CR_CERT:
+ return s->max_cert_list;
+
+ case TLS_ST_CR_CERT_STATUS:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+ case TLS_ST_CR_KEY_EXCH:
+ return SERVER_KEY_EXCH_MAX_LENGTH;
+
+ case TLS_ST_CR_CERT_REQ:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+ case TLS_ST_CR_SRVR_DONE:
+ return SERVER_HELLO_DONE_MAX_LENGTH;
+
+ case TLS_ST_CR_CHANGE:
+ return CCS_MAX_LENGTH;
+
+ case TLS_ST_CR_SESSION_TICKET:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+ case TLS_ST_CR_FINISHED:
+ return FINISHED_MAX_LENGTH;
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Process a message that the client has been received from the server.
+ */
+static enum MSG_PROCESS_RETURN client_process_message(SSL *s, PACKET *pkt)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_CR_SRVR_HELLO:
+ return tls_process_server_hello(s, pkt);
+
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ return dtls_process_hello_verify(s, pkt);
+
+ case TLS_ST_CR_CERT:
+ return tls_process_server_certificate(s, pkt);
+
+ case TLS_ST_CR_CERT_STATUS:
+ return tls_process_cert_status(s, pkt);
+
+ case TLS_ST_CR_KEY_EXCH:
+ return tls_process_key_exchange(s, pkt);
+
+ case TLS_ST_CR_CERT_REQ:
+ return tls_process_certificate_request(s, pkt);
+
+ case TLS_ST_CR_SRVR_DONE:
+ return tls_process_server_done(s, pkt);
+
+ case TLS_ST_CR_CHANGE:
+ return tls_process_change_cipher_spec(s, pkt);
+
+ case TLS_ST_CR_SESSION_TICKET:
+ return tls_process_new_session_ticket(s, pkt);
+
+ case TLS_ST_CR_FINISHED:
+ return tls_process_finished(s, pkt);
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return MSG_PROCESS_ERROR;
+}
+
+/*
+ * Perform any further processing required following the receipt of a message
+ * from the server
+ */
+static enum WORK_STATE client_post_process_message(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+#ifndef OPENSSL_NO_SCTP
+ case TLS_ST_CR_SRVR_DONE:
+ /* We only get here if we are using SCTP and we are renegotiating */
+ if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
+ s->s3->in_read_app_data = 2;
+ s->rwstate = SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ statem_set_sctp_read_sock(s, 1);
+ return WORK_MORE_A;
+ }
+ statem_set_sctp_read_sock(s, 0);
+ return WORK_FINISHED_STOP;
+#endif
+
+ case TLS_ST_CR_FINISHED:
+ if (!s->hit)
+ return tls_finish_handshake(s, wst);
+ else
+ return WORK_FINISHED_STOP;
+ default:
+ break;
+ }
+
+ /* Shouldn't happen */
+ return WORK_ERROR;
+}
+
+
+/*
+ * server_read_transition() encapsulates the logic for the allowed handshake
+ * state transitions when the server is reading messages from the client. The
+ * message type that the client has sent is provided in |mt|. The current state
+ * is in |s->statem.hand_state|.
+ *
+ * Valid return values are:
+ * 1: Success (transition allowed)
+ * 0: Error (transition not allowed)
+ */
+static int server_read_transition(SSL *s, int mt)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_BEFORE:
+ case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
+ if (mt == SSL3_MT_CLIENT_HELLO) {
+ st->hand_state = TLS_ST_SR_CLNT_HELLO;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_SW_SRVR_DONE:
+ /*
+ * If we get a CKE message after a ServerDone then either
+ * 1) We didn't request a Certificate
+ * OR
+ * 2) If we did request one then
+ * a) We allow no Certificate to be returned
+ * AND
+ * b) We are running SSL3 (in TLS1.0+ the client must return a 0
+ * list if we requested a certificate)
+ */
+ if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE
+ && (!s->s3->tmp.cert_request
+ || (!((s->verify_mode & SSL_VERIFY_PEER) &&
+ (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
+ && (s->version == SSL3_VERSION)))) {
+ st->hand_state = TLS_ST_SR_KEY_EXCH;
+ return 1;
+ } else if (s->s3->tmp.cert_request) {
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_SR_CERT;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_SR_CERT:
+ if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE) {
+ st->hand_state = TLS_ST_SR_KEY_EXCH;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_SR_KEY_EXCH:
+ /*
+ * We should only process a CertificateVerify message if we have
+ * received a Certificate from the client. If so then |s->session->peer|
+ * will be non NULL. In some instances a CertificateVerify message is
+ * not required even if the peer has sent a Certificate (e.g. such as in
+ * the case of static DH). In that case |s->no_cert_verify| should be
+ * set.
+ */
+ if (s->session->peer == NULL || s->no_cert_verify) {
+ if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ /*
+ * For the ECDH ciphersuites when the client sends its ECDH
+ * pub key in a certificate, the CertificateVerify message is
+ * not sent. Also for GOST ciphersuites when the client uses
+ * its key from the certificate for key exchange.
+ */
+ st->hand_state = TLS_ST_SR_CHANGE;
+ return 1;
+ }
+ } else {
+ if (mt == SSL3_MT_CERTIFICATE_VERIFY) {
+ st->hand_state = TLS_ST_SR_CERT_VRFY;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_SR_CERT_VRFY:
+ if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ st->hand_state = TLS_ST_SR_CHANGE;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_SR_CHANGE:
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ if (s->s3->next_proto_neg_seen) {
+ if (mt == SSL3_MT_NEXT_PROTO) {
+ st->hand_state = TLS_ST_SR_NEXT_PROTO;
+ return 1;
+ }
+ } else {
+#endif
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_SR_FINISHED;
+ return 1;
+ }
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ }
+#endif
+ break;
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ case TLS_ST_SR_NEXT_PROTO:
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_SR_FINISHED;
+ return 1;
+ }
+ break;
+#endif
+
+ case TLS_ST_SW_FINISHED:
+ if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ st->hand_state = TLS_ST_SR_CHANGE;
+ return 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ /* No valid transition found */
+ return 0;
+}
+
+/*
+ * Should we send a ServerKeyExchange message?
+ *
+ * Valid return values are:
+ * 1: Yes
+ * 0: No
+ */
+static inline int send_server_key_exchange(SSL *s)
+{
+ unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ /*
+ * only send a ServerKeyExchange if DH, fortezza or RSA but we have a
+ * sign only certificate PSK: may send PSK identity hints For
+ * ECC ciphersuites, we send a serverKeyExchange message only if
+ * the cipher suite is either ECDH-anon or ECDHE. In other cases,
+ * the server certificate contains the server's public key for
+ * key exchange.
+ */
+ if ( (alg_k & SSL_kDHE)
+ || (alg_k & SSL_kECDHE)
+ || ((alg_k & SSL_kRSA)
+ && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
+ || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
+ && EVP_PKEY_size(s->cert->pkeys
+ [SSL_PKEY_RSA_ENC].privatekey) *
+ 8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
+ )
+ )
+ )
+ /*
+ * PSK: send ServerKeyExchange if PSK identity hint if
+ * provided
+ */
+#ifndef OPENSSL_NO_PSK
+ /* Only send SKE if we have identity hint for plain PSK */
+ || ((alg_k & (SSL_kPSK | SSL_kRSAPSK))
+ && s->cert->psk_identity_hint)
+ /* For other PSK always send SKE */
+ || (alg_k & (SSL_PSK & (SSL_kDHEPSK | SSL_kECDHEPSK)))
+#endif
+#ifndef OPENSSL_NO_SRP
+ /* SRP: send ServerKeyExchange */
+ || (alg_k & SSL_kSRP)
+#endif
+ ) {
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Should we send a CertificateRequest message?
+ *
+ * Valid return values are:
+ * 1: Yes
+ * 0: No
+ */
+static inline int send_certificate_request(SSL *s)
+{
+ if (
+ /* don't request cert unless asked for it: */
+ s->verify_mode & SSL_VERIFY_PEER
+ /*
+ * if SSL_VERIFY_CLIENT_ONCE is set, don't request cert
+ * during re-negotiation:
+ */
+ && ((s->session->peer == NULL) ||
+ !(s->verify_mode & SSL_VERIFY_CLIENT_ONCE))
+ /*
+ * never request cert in anonymous ciphersuites (see
+ * section "Certificate request" in SSL 3 drafts and in
+ * RFC 2246):
+ */
+ && (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
+ /*
+ * ... except when the application insists on
+ * verification (against the specs, but s3_clnt.c accepts
+ * this for SSL 3)
+ */
+ || (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
+ /* don't request certificate for SRP auth */
+ && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aSRP)
+ /*
+ * With normal PSK Certificates and Certificate Requests
+ * are omitted
+ */
+ && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)) {
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * server_write_transition() works out what handshake state to move to next
+ * when the server is writing messages to be sent to the client.
+ */
+static enum WRITE_TRAN server_write_transition(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_BEFORE:
+ /* Just go straight to trying to read from the client */;
+ return WRITE_TRAN_FINISHED;
+
+ case TLS_ST_OK:
+ /* We must be trying to renegotiate */
+ st->hand_state = TLS_ST_SW_HELLO_REQ;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_HELLO_REQ:
+ st->hand_state = TLS_ST_OK;
+ statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SR_CLNT_HELLO:
+ if (SSL_IS_DTLS(s) && !s->d1->cookie_verified
+ && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
+ st->hand_state = DTLS_ST_SW_HELLO_VERIFY_REQUEST;
+ else
+ st->hand_state = TLS_ST_SW_SRVR_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
+ return WRITE_TRAN_FINISHED;
+
+ case TLS_ST_SW_SRVR_HELLO:
+ if (s->hit) {
+ if (s->tlsext_ticket_expected)
+ st->hand_state = TLS_ST_SW_SESSION_TICKET;
+ else
+ st->hand_state = TLS_ST_SW_CHANGE;
+ } else {
+ /* Check if it is anon DH or anon ECDH, */
+ /* normal PSK or SRP */
+ if (!(s->s3->tmp.new_cipher->algorithm_auth &
+ (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
+ st->hand_state = TLS_ST_SW_CERT;
+ } else if (send_server_key_exchange(s)) {
+ st->hand_state = TLS_ST_SW_KEY_EXCH;
+ } else if (send_certificate_request(s)) {
+ st->hand_state = TLS_ST_SW_CERT_REQ;
+ } else {
+ st->hand_state = TLS_ST_SW_SRVR_DONE;
+ }
+ }
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_CERT:
+ if (s->tlsext_status_expected) {
+ st->hand_state = TLS_ST_SW_CERT_STATUS;
+ return WRITE_TRAN_CONTINUE;
+ }
+ /* Fall through */
+
+ case TLS_ST_SW_CERT_STATUS:
+ if (send_server_key_exchange(s)) {
+ st->hand_state = TLS_ST_SW_KEY_EXCH;
+ return WRITE_TRAN_CONTINUE;
+ }
+ /* Fall through */
+
+ case TLS_ST_SW_KEY_EXCH:
+ if (send_certificate_request(s)) {
+ st->hand_state = TLS_ST_SW_CERT_REQ;
+ return WRITE_TRAN_CONTINUE;
+ }
+ /* Fall through */
+
+ case TLS_ST_SW_CERT_REQ:
+ st->hand_state = TLS_ST_SW_SRVR_DONE;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_SRVR_DONE:
+ return WRITE_TRAN_FINISHED;
+
+ case TLS_ST_SR_FINISHED:
+ if (s->hit) {
+ st->hand_state = TLS_ST_OK;
+ statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+ } else if (s->tlsext_ticket_expected) {
+ st->hand_state = TLS_ST_SW_SESSION_TICKET;
+ } else {
+ st->hand_state = TLS_ST_SW_CHANGE;
+ }
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_SESSION_TICKET:
+ st->hand_state = TLS_ST_SW_CHANGE;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_CHANGE:
+ st->hand_state = TLS_ST_SW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_SW_FINISHED:
+ if (s->hit) {
+ return WRITE_TRAN_FINISHED;
+ }
+ st->hand_state = TLS_ST_OK;
+ statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+
+ default:
+ /* Shouldn't happen */
+ return WRITE_TRAN_ERROR;
+ }
+}
+
+/*
+ * Perform any pre work that needs to be done prior to sending a message from
+ * the server to the client.
+ */
+static enum WORK_STATE server_pre_work(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_SW_HELLO_REQ:
+ s->shutdown = 0;
+ if (SSL_IS_DTLS(s))
+ dtls1_clear_record_buffer(s);
+ break;
+
+ case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
+ s->shutdown = 0;
+ if (SSL_IS_DTLS(s)) {
+ dtls1_clear_record_buffer(s);
+ /* We don't buffer this message so don't use the timer */
+ st->use_timer = 0;
+ }
+ break;
+
+ case TLS_ST_SW_SRVR_HELLO:
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * Messages we write from now on should be bufferred and
+ * retransmitted if necessary, so we need to use the timer now
+ */
+ st->use_timer = 1;
+ }
+ break;
+
+ case TLS_ST_SW_SRVR_DONE:
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ return dtls_wait_for_dry(s);
+#endif
+ return WORK_FINISHED_CONTINUE;
+
+ case TLS_ST_SW_SESSION_TICKET:
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * We're into the last flight. We don't retransmit the last flight
+ * unless we need to, so we don't use the timer
+ */
+ st->use_timer = 0;
+ }
+ break;
+
+ case TLS_ST_SW_CHANGE:
+ s->session->cipher = s->s3->tmp.new_cipher;
+ if (!s->method->ssl3_enc->setup_key_block(s)) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+ if (SSL_IS_DTLS(s)) {
+ /*
+ * We're into the last flight. We don't retransmit the last flight
+ * unless we need to, so we don't use the timer. This might have
+ * already been set to 0 if we sent a NewSessionTicket message,
+ * but we'll set it again here in case we didn't.
+ */
+ st->use_timer = 0;
+ }
+ return WORK_FINISHED_CONTINUE;
+
+ case TLS_ST_OK:
+ return tls_finish_handshake(s, wst);
+
+ default:
+ /* No pre work to be done */
+ break;
+ }
+
+ return WORK_FINISHED_CONTINUE;
+}
+
+/*
+ * Perform any work that needs to be done after sending a message from the
+ * server to the client.
+ */
+static enum WORK_STATE server_post_work(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ s->init_num = 0;
+
+ switch(st->hand_state) {
+ case TLS_ST_SW_HELLO_REQ:
+ if (statem_flush(s) != 1)
+ return WORK_MORE_A;
+ ssl3_init_finished_mac(s);
+ break;
+
+ case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
+ if (statem_flush(s) != 1)
+ return WORK_MORE_A;
+ /* HelloVerifyRequest resets Finished MAC */
+ if (s->version != DTLS1_BAD_VER)
+ ssl3_init_finished_mac(s);
+ /*
+ * The next message should be another ClientHello which we need to
+ * treat like it was the first packet
+ */
+ s->first_packet = 1;
+ break;
+
+ case TLS_ST_SW_SRVR_HELLO:
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && s->hit) {
+ unsigned char sctpauthkey[64];
+ char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+
+ /*
+ * Add new shared key for SCTP-Auth, will be ignored if no
+ * SCTP used.
+ */
+ snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ if (SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0) <= 0) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+ }
+#endif
+ break;
+
+ case TLS_ST_SW_CHANGE:
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && !s->hit) {
+ /*
+ * Change to new shared key of SCTP-Auth, will be ignored if
+ * no SCTP used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
+ 0, NULL);
+ }
+#endif
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CHANGE_CIPHER_SERVER_WRITE)) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+
+ if (SSL_IS_DTLS(s))
+ dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
+ break;
+
+ case TLS_ST_SW_SRVR_DONE:
+ if (statem_flush(s) != 1)
+ return WORK_MORE_A;
+ break;
+
+ case TLS_ST_SW_FINISHED:
+ if (statem_flush(s) != 1)
+ return WORK_MORE_A;
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && s->hit) {
+ /*
+ * Change to new shared key of SCTP-Auth, will be ignored if
+ * no SCTP used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
+ 0, NULL);
+ }
+#endif
+ break;
+
+ default:
+ /* No post work to be done */
+ break;
+ }
+
+ return WORK_FINISHED_CONTINUE;
+}
+
+/*
+ * Construct a message to be sent from the server to the client.
+ *
+ * Valid return values are:
+ * 1: Success
+ * 0: Error
+ */
+static int server_construct_message(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case DTLS_ST_SW_HELLO_VERIFY_REQUEST:
+ return dtls_construct_hello_verify_request(s);
+
+ case TLS_ST_SW_HELLO_REQ:
+ return tls_construct_hello_request(s);
+
+ case TLS_ST_SW_SRVR_HELLO:
+ return tls_construct_server_hello(s);
+
+ case TLS_ST_SW_CERT:
+ return tls_construct_server_certificate(s);
+
+ case TLS_ST_SW_KEY_EXCH:
+ return tls_construct_server_key_exchange(s);
+
+ case TLS_ST_SW_CERT_REQ:
+ return tls_construct_certificate_request(s);
+
+ case TLS_ST_SW_SRVR_DONE:
+ return tls_construct_server_done(s);
+
+ case TLS_ST_SW_SESSION_TICKET:
+ return tls_construct_new_session_ticket(s);
+
+ case TLS_ST_SW_CERT_STATUS:
+ return tls_construct_cert_status(s);
+
+ case TLS_ST_SW_CHANGE:
+ if (SSL_IS_DTLS(s))
+ return dtls_construct_change_cipher_spec(s);
+ else
+ return tls_construct_change_cipher_spec(s);
+
+ case TLS_ST_SW_FINISHED:
+ return tls_construct_finished(s,
+ s->method->
+ ssl3_enc->server_finished_label,
+ s->method->
+ ssl3_enc->server_finished_label_len);
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return 0;
+}
+
+#define CLIENT_KEY_EXCH_MAX_LENGTH 2048
+#define NEXT_PROTO_MAX_LENGTH 514
+
+/*
+ * Returns the maximum allowed length for the current message that we are
+ * reading. Excludes the message header.
+ */
+static unsigned long server_max_message_size(SSL *s)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_SR_CLNT_HELLO:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+ case TLS_ST_SR_CERT:
+ return s->max_cert_list;
+
+ case TLS_ST_SR_KEY_EXCH:
+ return CLIENT_KEY_EXCH_MAX_LENGTH;
+
+ case TLS_ST_SR_CERT_VRFY:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ case TLS_ST_SR_NEXT_PROTO:
+ return NEXT_PROTO_MAX_LENGTH;
+#endif
+
+ case TLS_ST_SR_CHANGE:
+ return CCS_MAX_LENGTH;
+
+ case TLS_ST_SR_FINISHED:
+ return FINISHED_MAX_LENGTH;
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Process a message that the server has received from the client.
+ */
+static enum MSG_PROCESS_RETURN server_process_message(SSL *s, PACKET *pkt)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_SR_CLNT_HELLO:
+ return tls_process_client_hello(s, pkt);
+
+ case TLS_ST_SR_CERT:
+ return tls_process_client_certificate(s, pkt);
+
+ case TLS_ST_SR_KEY_EXCH:
+ return tls_process_client_key_exchange(s, pkt);
+
+ case TLS_ST_SR_CERT_VRFY:
+ return tls_process_cert_verify(s, pkt);
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ case TLS_ST_SR_NEXT_PROTO:
+ return tls_process_next_proto(s, pkt);
+#endif
+
+ case TLS_ST_SR_CHANGE:
+ return tls_process_change_cipher_spec(s, pkt);
+
+ case TLS_ST_SR_FINISHED:
+ return tls_process_finished(s, pkt);
+
+ default:
+ /* Shouldn't happen */
+ break;
+ }
+
+ return MSG_PROCESS_ERROR;
+}
+
+/*
+ * Perform any further processing required following the receipt of a message
+ * from the client
+ */
+static enum WORK_STATE server_post_process_message(SSL *s, enum WORK_STATE wst)
+{
+ STATEM *st = &s->statem;
+
+ switch(st->hand_state) {
+ case TLS_ST_SR_CLNT_HELLO:
+ return tls_post_process_client_hello(s, wst);
+
+ case TLS_ST_SR_KEY_EXCH:
+ return tls_post_process_client_key_exchange(s, wst);
+
+ case TLS_ST_SR_CERT_VRFY:
+#ifndef OPENSSL_NO_SCTP
+ if ( /* Is this SCTP? */
+ BIO_dgram_is_sctp(SSL_get_wbio(s))
+ /* Are we renegotiating? */
+ && s->renegotiate
+ && BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
+ s->s3->in_read_app_data = 2;
+ s->rwstate = SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ statem_set_sctp_read_sock(s, 1);
+ return WORK_MORE_A;
+ } else {
+ statem_set_sctp_read_sock(s, 0);
+ }
+#endif
+ return WORK_FINISHED_CONTINUE;
+
+
+ case TLS_ST_SR_FINISHED:
+ if (s->hit)
+ return tls_finish_handshake(s, wst);
+ else
+ return WORK_FINISHED_STOP;
+ default:
+ break;
+ }
+
+ /* Shouldn't happen */
+ return WORK_ERROR;
+}
--- /dev/null
+/* ssl/statem/statem.h */
+/* ====================================================================
+ * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/*****************************************************************************
+ * *
+ * These emums should be considered PRIVATE to the state machine. No *
+ * non-state machine code should need to use these *
+ * *
+ *****************************************************************************/
+/*
+ * Valid return codes used for functions performing work prior to or after
+ * sending or receiving a message
+ */
+enum WORK_STATE {
+ /* Something went wrong */
+ WORK_ERROR,
+ /* We're done working and there shouldn't be anything else to do after */
+ WORK_FINISHED_STOP,
+ /* We're done working move onto the next thing */
+ WORK_FINISHED_CONTINUE,
+ /* We're working on phase A */
+ WORK_MORE_A,
+ /* We're working on phase B */
+ WORK_MORE_B
+};
+
+/* Write transition return codes */
+enum WRITE_TRAN {
+ /* Something went wrong */
+ WRITE_TRAN_ERROR,
+ /* A transition was successfully completed and we should continue */
+ WRITE_TRAN_CONTINUE,
+ /* There is no more write work to be done */
+ WRITE_TRAN_FINISHED
+};
+
+/* Message processing return codes */
+enum MSG_PROCESS_RETURN {
+ MSG_PROCESS_ERROR,
+ MSG_PROCESS_FINISHED_READING,
+ MSG_PROCESS_CONTINUE_PROCESSING,
+ MSG_PROCESS_CONTINUE_READING
+};
+
+/* Message flow states */
+enum MSG_FLOW_STATE {
+ /* No handshake in progress */
+ MSG_FLOW_UNINITED,
+ /* A permanent error with this connection */
+ MSG_FLOW_ERROR,
+ /* We are about to renegotiate */
+ MSG_FLOW_RENEGOTIATE,
+ /* We are reading messages */
+ MSG_FLOW_READING,
+ /* We are writing messages */
+ MSG_FLOW_WRITING,
+ /* Handshake has finished */
+ MSG_FLOW_FINISHED
+};
+
+/* Read states */
+enum READ_STATE {
+ READ_STATE_HEADER,
+ READ_STATE_BODY,
+ READ_STATE_POST_PROCESS
+};
+
+/* Write states */
+enum WRITE_STATE {
+ WRITE_STATE_TRANSITION,
+ WRITE_STATE_PRE_WORK,
+ WRITE_STATE_SEND,
+ WRITE_STATE_POST_WORK
+};
+
+
+/*****************************************************************************
+ * *
+ * This structure should be considered "opaque" to anything outside of the *
+ * state machine. No non-state machine code should be accessing the members *
+ * of this structure. *
+ * *
+ *****************************************************************************/
+
+struct statem_st {
+ enum MSG_FLOW_STATE state;
+ enum WRITE_STATE write_state;
+ enum WORK_STATE write_state_work;
+ enum READ_STATE read_state;
+ enum WORK_STATE read_state_work;
+ enum HANDSHAKE_STATE hand_state;
+ int in_init;
+ int read_state_first_init;
+ int use_timer;
+#ifndef OPENSSL_NO_SCTP
+ int in_sctp_read_sock;
+#endif
+};
+typedef struct statem_st STATEM;
+
+
+/*****************************************************************************
+ * *
+ * The following macros/functions represent the libssl internal API to the *
+ * state machine. Any libssl code may call these functions/macros *
+ * *
+ *****************************************************************************/
+
+__owur int statem_accept(SSL *s);
+__owur int statem_connect(SSL *s);
+void statem_clear(SSL *s);
+void statem_set_renegotiate(SSL *s);
+void statem_set_error(SSL *s);
+int statem_in_error(const SSL *s);
+void statem_set_in_init(SSL *s, int init);
+__owur int statem_app_data_allowed(SSL *s);
+#ifndef OPENSSL_NO_SCTP
+void statem_set_sctp_read_sock(SSL *s, int read_sock);
+__owur int statem_in_sctp_read_sock(SSL *s);
+#endif
+
+
--- /dev/null
+/* ssl/statem/statem_clnt.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * Portions of the attached software ("Contribution") are developed by
+ * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
+ *
+ * The Contribution is licensed pursuant to the OpenSSL open source
+ * license provided above.
+ *
+ * ECC cipher suite support in OpenSSL originally written by
+ * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
+
+#include <stdio.h>
+#include "../ssl_locl.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#include <openssl/md5.h>
+#ifndef OPENSSL_NO_DH
+# include <openssl/dh.h>
+#endif
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
+
+static int ssl_set_version(SSL *s);
+static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
+static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
+ unsigned char *p);
+
+/*
+ * Work out what version we should be using for the initial ClientHello if
+ * the version is currently set to (D)TLS_ANY_VERSION.
+ * Returns 1 on success
+ * Returns 0 on error
+ */
+static int ssl_set_version(SSL *s)
+{
+ unsigned long mask, options = s->options;
+
+ if (s->method->version == TLS_ANY_VERSION) {
+ /*
+ * SSL_OP_NO_X disables all protocols above X *if* there are
+ * some protocols below X enabled. This is required in order
+ * to maintain "version capability" vector contiguous. So
+ * that if application wants to disable TLS1.0 in favour of
+ * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
+ * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
+ */
+ mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
+#if !defined(OPENSSL_NO_SSL3)
+ | SSL_OP_NO_SSLv3
+#endif
+ ;
+#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
+ if (options & SSL_OP_NO_TLSv1_2) {
+ if ((options & mask) != mask) {
+ s->version = TLS1_1_VERSION;
+ } else {
+ SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
+ return 0;
+ }
+ } else {
+ s->version = TLS1_2_VERSION;
+ }
+#else
+ if ((options & mask) == mask) {
+ SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
+ return 0;
+ }
+ s->version = TLS1_1_VERSION;
+#endif
+
+ mask &= ~SSL_OP_NO_TLSv1_1;
+ if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
+ s->version = TLS1_VERSION;
+ mask &= ~SSL_OP_NO_TLSv1;
+#if !defined(OPENSSL_NO_SSL3)
+ if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
+ s->version = SSL3_VERSION;
+#endif
+
+ if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
+ SSLerr(SSL_F_SSL_SET_VERSION,
+ SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
+ return 0;
+ }
+
+ if (s->version == SSL3_VERSION && FIPS_mode()) {
+ SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
+ return 0;
+ }
+
+ } else if (s->method->version == DTLS_ANY_VERSION) {
+ /* Determine which DTLS version to use */
+ /* If DTLS 1.2 disabled correct the version number */
+ if (options & SSL_OP_NO_DTLSv1_2) {
+ if (tls1_suiteb(s)) {
+ SSLerr(SSL_F_SSL_SET_VERSION,
+ SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
+ return 0;
+ }
+ /*
+ * Disabling all versions is silly: return an error.
+ */
+ if (options & SSL_OP_NO_DTLSv1) {
+ SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
+ return 0;
+ }
+ /*
+ * Update method so we don't use any DTLS 1.2 features.
+ */
+ s->method = DTLSv1_client_method();
+ s->version = DTLS1_VERSION;
+ } else {
+ /*
+ * We only support one version: update method
+ */
+ if (options & SSL_OP_NO_DTLSv1)
+ s->method = DTLSv1_2_client_method();
+ s->version = DTLS1_2_VERSION;
+ }
+ }
+
+ s->client_version = s->version;
+
+ return 1;
+}
+
+int tls_construct_client_hello(SSL *s)
+{
+ unsigned char *buf;
+ unsigned char *p, *d;
+ int i;
+ unsigned long l;
+ int al = 0;
+#ifndef OPENSSL_NO_COMP
+ int j;
+ SSL_COMP *comp;
+#endif
+ SSL_SESSION *sess = s->session;
+
+ buf = (unsigned char *)s->init_buf->data;
+
+ /* Work out what SSL/TLS/DTLS version to use */
+ if (ssl_set_version(s) == 0)
+ goto err;
+
+ if ((sess == NULL) || (sess->ssl_version != s->version) ||
+ /*
+ * In the case of EAP-FAST, we can have a pre-shared
+ * "ticket" without a session ID.
+ */
+ (!sess->session_id_length && !sess->tlsext_tick) ||
+ (sess->not_resumable)) {
+ if (!ssl_get_new_session(s, 0))
+ goto err;
+ }
+ /* else use the pre-loaded session */
+
+ p = s->s3->client_random;
+
+ /*
+ * for DTLS if client_random is initialized, reuse it, we are
+ * required to use same upon reply to HelloVerify
+ */
+ if (SSL_IS_DTLS(s)) {
+ size_t idx;
+ i = 1;
+ for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
+ if (p[idx]) {
+ i = 0;
+ break;
+ }
+ }
+ } else
+ i = 1;
+
+ if (i && ssl_fill_hello_random(s, 0, p,
+ sizeof(s->s3->client_random)) <= 0)
+ goto err;
+
+ /* Do the message type and length last */
+ d = p = ssl_handshake_start(s);
+
+ /*-
+ * version indicates the negotiated version: for example from
+ * an SSLv2/v3 compatible client hello). The client_version
+ * field is the maximum version we permit and it is also
+ * used in RSA encrypted premaster secrets. Some servers can
+ * choke if we initially report a higher version then
+ * renegotiate to a lower one in the premaster secret. This
+ * didn't happen with TLS 1.0 as most servers supported it
+ * but it can with TLS 1.1 or later if the server only supports
+ * 1.0.
+ *
+ * Possible scenario with previous logic:
+ * 1. Client hello indicates TLS 1.2
+ * 2. Server hello says TLS 1.0
+ * 3. RSA encrypted premaster secret uses 1.2.
+ * 4. Handhaked proceeds using TLS 1.0.
+ * 5. Server sends hello request to renegotiate.
+ * 6. Client hello indicates TLS v1.0 as we now
+ * know that is maximum server supports.
+ * 7. Server chokes on RSA encrypted premaster secret
+ * containing version 1.0.
+ *
+ * For interoperability it should be OK to always use the
+ * maximum version we support in client hello and then rely
+ * on the checking of version to ensure the servers isn't
+ * being inconsistent: for example initially negotiating with
+ * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
+ * client_version in client hello and not resetting it to
+ * the negotiated version.
+ */
+ *(p++) = s->client_version >> 8;
+ *(p++) = s->client_version & 0xff;
+
+ /* Random stuff */
+ memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
+ p += SSL3_RANDOM_SIZE;
+
+ /* Session ID */
+ if (s->new_session)
+ i = 0;
+ else
+ i = s->session->session_id_length;
+ *(p++) = i;
+ if (i != 0) {
+ if (i > (int)sizeof(s->session->session_id)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ memcpy(p, s->session->session_id, i);
+ p += i;
+ }
+
+ /* cookie stuff for DTLS */
+ if (SSL_IS_DTLS(s)) {
+ if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ *(p++) = s->d1->cookie_len;
+ memcpy(p, s->d1->cookie, s->d1->cookie_len);
+ p += s->d1->cookie_len;
+ }
+
+ /* Ciphers supported */
+ i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
+ if (i == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
+ goto err;
+ }
+#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
+ /*
+ * Some servers hang if client hello > 256 bytes as hack workaround
+ * chop number of supported ciphers to keep it well below this if we
+ * use TLS v1.2
+ */
+ if (TLS1_get_version(s) >= TLS1_2_VERSION
+ && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
+ i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
+#endif
+ s2n(i, p);
+ p += i;
+
+ /* COMPRESSION */
+#ifdef OPENSSL_NO_COMP
+ *(p++) = 1;
+#else
+
+ if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
+ j = 0;
+ else
+ j = sk_SSL_COMP_num(s->ctx->comp_methods);
+ *(p++) = 1 + j;
+ for (i = 0; i < j; i++) {
+ comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
+ *(p++) = comp->id;
+ }
+#endif
+ *(p++) = 0; /* Add the NULL method */
+
+ /* TLS extensions */
+ if (ssl_prepare_clienthello_tlsext(s) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
+ goto err;
+ }
+ if ((p =
+ ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
+ &al)) == NULL) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ l = p - d;
+ if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ return 1;
+ err:
+ statem_set_error(s);
+ return 0;
+}
+
+enum MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
+{
+ int al;
+ unsigned int cookie_len;
+ PACKET cookiepkt;
+
+ if (!PACKET_forward(pkt, 2)
+ || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ cookie_len = PACKET_remaining(&cookiepkt);
+ if (cookie_len > sizeof(s->d1->cookie)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+
+ if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ s->d1->cookie_len = cookie_len;
+
+ return MSG_PROCESS_FINISHED_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
+{
+ STACK_OF(SSL_CIPHER) *sk;
+ const SSL_CIPHER *c;
+ PACKET session_id;
+ size_t session_id_len;
+ unsigned char *cipherchars;
+ int i, al = SSL_AD_INTERNAL_ERROR;
+ unsigned int compression;
+#ifndef OPENSSL_NO_COMP
+ SSL_COMP *comp;
+#endif
+
+ if (s->method->version == TLS_ANY_VERSION) {
+ unsigned int sversion;
+
+ if (!PACKET_get_net_2(pkt, &sversion)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+#if TLS_MAX_VERSION != TLS1_2_VERSION
+#error Code needs updating for new TLS version
+#endif
+#ifndef OPENSSL_NO_SSL3
+ if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
+ if (FIPS_mode()) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ s->method = SSLv3_client_method();
+ } else
+#endif
+ if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
+ s->method = TLSv1_client_method();
+ } else if ((sversion == TLS1_1_VERSION) &&
+ !(s->options & SSL_OP_NO_TLSv1_1)) {
+ s->method = TLSv1_1_client_method();
+ } else if ((sversion == TLS1_2_VERSION) &&
+ !(s->options & SSL_OP_NO_TLSv1_2)) {
+ s->method = TLSv1_2_client_method();
+ } else {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ s->session->ssl_version = s->version = s->method->version;
+
+ if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ } else if (s->method->version == DTLS_ANY_VERSION) {
+ /* Work out correct protocol version to use */
+ unsigned int hversion;
+ int options;
+
+ if (!PACKET_get_net_2(pkt, &hversion)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ options = s->options;
+ if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
+ s->method = DTLSv1_2_client_method();
+ else if (tls1_suiteb(s)) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
+ s->version = hversion;
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
+ s->method = DTLSv1_client_method();
+ else {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
+ s->version = hversion;
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ s->session->ssl_version = s->version = s->method->version;
+ } else {
+ unsigned char *vers;
+
+ if (!PACKET_get_bytes(pkt, &vers, 2)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if ((vers[0] != (s->version >> 8))
+ || (vers[1] != (s->version & 0xff))) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
+ s->version = (s->version & 0xff00) | vers[1];
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ }
+
+ /* load the server hello data */
+ /* load the server random */
+ if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ s->hit = 0;
+
+ /* Get the session-id. */
+ if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ session_id_len = PACKET_remaining(&session_id);
+ if (session_id_len > sizeof s->session->session_id
+ || session_id_len > SSL3_SESSION_ID_SIZE) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
+ goto f_err;
+ }
+
+ if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
+ SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ /*
+ * Check if we can resume the session based on external pre-shared secret.
+ * EAP-FAST (RFC 4851) supports two types of session resumption.
+ * Resumption based on server-side state works with session IDs.
+ * Resumption based on pre-shared Protected Access Credentials (PACs)
+ * works by overriding the SessionTicket extension at the application
+ * layer, and does not send a session ID. (We do not know whether EAP-FAST
+ * servers would honour the session ID.) Therefore, the session ID alone
+ * is not a reliable indicator of session resumption, so we first check if
+ * we can resume, and later peek at the next handshake message to see if the
+ * server wants to resume.
+ */
+ if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
+ s->session->tlsext_tick) {
+ SSL_CIPHER *pref_cipher = NULL;
+ s->session->master_key_length = sizeof(s->session->master_key);
+ if (s->tls_session_secret_cb(s, s->session->master_key,
+ &s->session->master_key_length,
+ NULL, &pref_cipher,
+ s->tls_session_secret_cb_arg)) {
+ s->session->cipher = pref_cipher ?
+ pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
+ } else {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+ }
+
+ if (session_id_len != 0 && session_id_len == s->session->session_id_length
+ && memcmp(PACKET_data(&session_id), s->session->session_id,
+ session_id_len) == 0) {
+ if (s->sid_ctx_length != s->session->sid_ctx_length
+ || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
+ /* actually a client application bug */
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
+ goto f_err;
+ }
+ s->hit = 1;
+ } else {
+ /*
+ * If we were trying for session-id reuse but the server
+ * didn't echo the ID, make a new SSL_SESSION.
+ * In the case of EAP-FAST and PAC, we do not send a session ID,
+ * so the PAC-based session secret is always preserved. It'll be
+ * overwritten if the server refuses resumption.
+ */
+ if (s->session->session_id_length > 0) {
+ if (!ssl_get_new_session(s, 0)) {
+ goto f_err;
+ }
+ }
+
+ s->session->session_id_length = session_id_len;
+ /* session_id_len could be 0 */
+ memcpy(s->session->session_id, PACKET_data(&session_id),
+ session_id_len);
+ }
+
+ c = ssl_get_cipher_by_char(s, cipherchars);
+ if (c == NULL) {
+ /* unknown cipher */
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
+ goto f_err;
+ }
+ /* Set version disabled mask now we know version */
+ if (!SSL_USE_TLS1_2_CIPHERS(s))
+ s->s3->tmp.mask_ssl = SSL_TLSV1_2;
+ else
+ s->s3->tmp.mask_ssl = 0;
+ /*
+ * If it is a disabled cipher we didn't send it in client hello, so
+ * return an error.
+ */
+ if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
+ goto f_err;
+ }
+
+ sk = ssl_get_ciphers_by_id(s);
+ i = sk_SSL_CIPHER_find(sk, c);
+ if (i < 0) {
+ /* we did not say we would use this cipher */
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
+ goto f_err;
+ }
+
+ /*
+ * Depending on the session caching (internal/external), the cipher
+ * and/or cipher_id values may not be set. Make sure that cipher_id is
+ * set and use it for comparison.
+ */
+ if (s->session->cipher)
+ s->session->cipher_id = s->session->cipher->id;
+ if (s->hit && (s->session->cipher_id != c->id)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
+ goto f_err;
+ }
+ s->s3->tmp.new_cipher = c;
+ /*
+ * Don't digest cached records if no sigalgs: we may need them for client
+ * authentication.
+ */
+ if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
+ goto f_err;
+ /* lets get the compression algorithm */
+ /* COMPRESSION */
+ if (!PACKET_get_1(pkt, &compression)) {
+ SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+#ifdef OPENSSL_NO_COMP
+ if (compression != 0) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
+ goto f_err;
+ }
+ /*
+ * If compression is disabled we'd better not try to resume a session
+ * using compression.
+ */
+ if (s->session->compress_meth != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
+ goto f_err;
+ }
+#else
+ if (s->hit && compression != s->session->compress_meth) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
+ goto f_err;
+ }
+ if (compression == 0)
+ comp = NULL;
+ else if (!ssl_allow_compression(s)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
+ goto f_err;
+ } else {
+ comp = ssl3_comp_find(s->ctx->comp_methods, compression);
+ }
+
+ if (compression != 0 && comp == NULL) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
+ goto f_err;
+ } else {
+ s->s3->tmp.new_compression = comp;
+ }
+#endif
+
+ /* TLS extensions */
+ if (!ssl_parse_serverhello_tlsext(s, pkt)) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
+ goto err;
+ }
+
+ if (PACKET_remaining(pkt) != 0) {
+ /* wrong packet length */
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
+ goto f_err;
+ }
+
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && s->hit) {
+ unsigned char sctpauthkey[64];
+ char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+
+ /*
+ * Add new shared key for SCTP-Auth, will be ignored if
+ * no SCTP used.
+ */
+ snprintf((char *)labelbuffer,
+ sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ if (SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey),
+ labelbuffer,
+ sizeof(labelbuffer), NULL, 0,
+ 0) <= 0)
+ goto err;
+
+ BIO_ctrl(SSL_get_wbio(s),
+ BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+ }
+#endif
+
+ return MSG_PROCESS_CONTINUE_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
+{
+ int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
+ unsigned long cert_list_len, cert_len;
+ X509 *x = NULL;
+ unsigned char *certstart, *certbytes;
+ STACK_OF(X509) *sk = NULL;
+ EVP_PKEY *pkey = NULL;
+
+ if ((sk = sk_X509_new_null()) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (!PACKET_get_net_3(pkt, &cert_list_len)
+ || PACKET_remaining(pkt) != cert_list_len) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ while (PACKET_remaining(pkt)) {
+ if (!PACKET_get_net_3(pkt, &cert_len)
+ || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ certstart = certbytes;
+ x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
+ if (x == NULL) {
+ al = SSL_AD_BAD_CERTIFICATE;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
+ goto f_err;
+ }
+ if (certbytes != (certstart + cert_len)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if (!sk_X509_push(sk, x)) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ x = NULL;
+ }
+
+ i = ssl_verify_cert_chain(s, sk);
+ if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
+ al = ssl_verify_alarm_type(s->verify_result);
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_CERTIFICATE_VERIFY_FAILED);
+ goto f_err;
+ }
+ ERR_clear_error(); /* but we keep s->verify_result */
+ if (i > 1) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ goto f_err;
+ }
+
+ s->session->peer_chain = sk;
+ /*
+ * Inconsistency alert: cert_chain does include the peer's certificate,
+ * which we don't include in s3_srvr.c
+ */
+ x = sk_X509_value(sk, 0);
+ sk = NULL;
+ /*
+ * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
+ */
+
+ pkey = X509_get_pubkey(x);
+
+ if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
+ x = NULL;
+ al = SSL3_AL_FATAL;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
+ goto f_err;
+ }
+
+ i = ssl_cert_type(x, pkey);
+ if (i < 0) {
+ x = NULL;
+ al = SSL3_AL_FATAL;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_UNKNOWN_CERTIFICATE_TYPE);
+ goto f_err;
+ }
+
+ exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
+ if (exp_idx >= 0 && i != exp_idx) {
+ x = NULL;
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_WRONG_CERTIFICATE_TYPE);
+ goto f_err;
+ }
+ s->session->peer_type = i;
+
+ X509_free(s->session->peer);
+ X509_up_ref(x);
+ s->session->peer = x;
+ s->session->verify_result = s->verify_result;
+
+ x = NULL;
+ ret = MSG_PROCESS_CONTINUE_READING;
+ goto done;
+
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ statem_set_error(s);
+ done:
+ EVP_PKEY_free(pkey);
+ X509_free(x);
+ sk_X509_pop_free(sk, X509_free);
+ return ret;
+}
+
+enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
+{
+#ifndef OPENSSL_NO_RSA
+ unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
+#endif
+ EVP_MD_CTX md_ctx;
+ int al, j, verify_ret;
+ long alg_k, alg_a;
+ EVP_PKEY *pkey = NULL;
+ const EVP_MD *md = NULL;
+#ifndef OPENSSL_NO_RSA
+ RSA *rsa = NULL;
+#endif
+#ifndef OPENSSL_NO_DH
+ DH *dh = NULL;
+#endif
+#ifndef OPENSSL_NO_EC
+ EC_KEY *ecdh = NULL;
+ BN_CTX *bn_ctx = NULL;
+ EC_POINT *srvr_ecpoint = NULL;
+ int curve_nid = 0;
+#endif
+ PACKET save_param_start, signature;
+
+ EVP_MD_CTX_init(&md_ctx);
+
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ save_param_start = *pkt;
+
+#ifndef OPENSSL_NO_RSA
+ RSA_free(s->s3->peer_rsa_tmp);
+ s->s3->peer_rsa_tmp = NULL;
+#endif
+#ifndef OPENSSL_NO_DH
+ DH_free(s->s3->peer_dh_tmp);
+ s->s3->peer_dh_tmp = NULL;
+#endif
+#ifndef OPENSSL_NO_EC
+ EC_KEY_free(s->s3->peer_ecdh_tmp);
+ s->s3->peer_ecdh_tmp = NULL;
+#endif
+
+ alg_a = s->s3->tmp.new_cipher->algorithm_auth;
+
+ al = SSL_AD_DECODE_ERROR;
+
+#ifndef OPENSSL_NO_PSK
+ /* PSK ciphersuites are preceded by an identity hint */
+ if (alg_k & SSL_PSK) {
+ PACKET psk_identity_hint;
+ if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ /*
+ * Store PSK identity hint for later use, hint is used in
+ * ssl3_send_client_key_exchange. Assume that the maximum length of
+ * a PSK identity hint can be as long as the maximum length of a PSK
+ * identity.
+ */
+ if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+
+ if (!PACKET_strndup(&psk_identity_hint,
+ &s->session->psk_identity_hint)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+ }
+
+ /* Nothing else to do for plain PSK or RSAPSK */
+ if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
+ } else
+#endif /* !OPENSSL_NO_PSK */
+#ifndef OPENSSL_NO_SRP
+ if (alg_k & SSL_kSRP) {
+ PACKET prime, generator, salt, server_pub;
+ if (!PACKET_get_length_prefixed_2(pkt, &prime)
+ || !PACKET_get_length_prefixed_2(pkt, &generator)
+ || !PACKET_get_length_prefixed_1(pkt, &salt)
+ || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ if ((s->srp_ctx.N =
+ BN_bin2bn(PACKET_data(&prime),
+ PACKET_remaining(&prime), NULL)) == NULL
+ || (s->srp_ctx.g =
+ BN_bin2bn(PACKET_data(&generator),
+ PACKET_remaining(&generator), NULL)) == NULL
+ || (s->srp_ctx.s =
+ BN_bin2bn(PACKET_data(&salt),
+ PACKET_remaining(&salt), NULL)) == NULL
+ || (s->srp_ctx.B =
+ BN_bin2bn(PACKET_data(&server_pub),
+ PACKET_remaining(&server_pub), NULL)) == NULL) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
+ goto err;
+ }
+
+ if (!srp_verify_server_param(s, &al)) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
+ goto f_err;
+ }
+
+/* We must check if there is a certificate */
+ if (alg_a & (SSL_aRSA|SSL_aDSS))
+ pkey = X509_get_pubkey(s->session->peer);
+ } else
+#endif /* !OPENSSL_NO_SRP */
+#ifndef OPENSSL_NO_RSA
+ if (alg_k & SSL_kRSA) {
+ PACKET mod, exp;
+ /* Temporary RSA keys only allowed in export ciphersuites */
+ if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+
+ if (!PACKET_get_length_prefixed_2(pkt, &mod)
+ || !PACKET_get_length_prefixed_2(pkt, &exp)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ if ((rsa = RSA_new()) == NULL) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod),
+ rsa->n)) == NULL
+ || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp),
+ rsa->e)) == NULL) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
+ goto err;
+ }
+
+ /* this should be because we are using an export cipher */
+ if (alg_a & SSL_aRSA)
+ pkey = X509_get_pubkey(s->session->peer);
+ else {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+
+ s->s3->peer_rsa_tmp = rsa;
+ rsa = NULL;
+ }
+#else /* OPENSSL_NO_RSA */
+ if (0) ;
+#endif
+#ifndef OPENSSL_NO_DH
+ else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
+ PACKET prime, generator, pub_key;
+
+ if (!PACKET_get_length_prefixed_2(pkt, &prime)
+ || !PACKET_get_length_prefixed_2(pkt, &generator)
+ || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ if ((dh = DH_new()) == NULL) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
+ goto err;
+ }
+
+ if ((dh->p = BN_bin2bn(PACKET_data(&prime),
+ PACKET_remaining(&prime), NULL)) == NULL
+ || (dh->g = BN_bin2bn(PACKET_data(&generator),
+ PACKET_remaining(&generator), NULL)) == NULL
+ || (dh->pub_key =
+ BN_bin2bn(PACKET_data(&pub_key),
+ PACKET_remaining(&pub_key), NULL)) == NULL) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
+ goto err;
+ }
+
+ if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
+ goto f_err;
+ }
+
+ if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
+ goto f_err;
+ }
+ if (alg_a & (SSL_aRSA|SSL_aDSS))
+ pkey = X509_get_pubkey(s->session->peer);
+ /* else anonymous DH, so no certificate or pkey. */
+
+ s->s3->peer_dh_tmp = dh;
+ dh = NULL;
+ }
+#endif /* !OPENSSL_NO_DH */
+
+#ifndef OPENSSL_NO_EC
+ else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ EC_GROUP *ngroup;
+ const EC_GROUP *group;
+ PACKET encoded_pt;
+ unsigned char *ecparams;
+
+ if ((ecdh = EC_KEY_new()) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /*
+ * Extract elliptic curve parameters and the server's ephemeral ECDH
+ * public key. For now we only support named (not generic) curves and
+ * ECParameters in this case is just three bytes.
+ */
+ if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ /*
+ * Check curve is one of our preferences, if not server has sent an
+ * invalid curve. ECParameters is 3 bytes.
+ */
+ if (!tls1_check_curve(s, ecparams, 3)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
+ goto f_err;
+ }
+
+ if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
+ SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
+ goto f_err;
+ }
+
+ ngroup = EC_GROUP_new_by_curve_name(curve_nid);
+ if (ngroup == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ if (EC_KEY_set_group(ecdh, ngroup) == 0) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ EC_GROUP_free(ngroup);
+
+ group = EC_KEY_get0_group(ecdh);
+
+ if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
+ (EC_GROUP_get_degree(group) > 163)) {
+ al = SSL_AD_EXPORT_RESTRICTION;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
+ SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
+ goto f_err;
+ }
+
+ /* Next, get the encoded ECPoint */
+ if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
+ ((bn_ctx = BN_CTX_new()) == NULL)) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt),
+ PACKET_remaining(&encoded_pt), bn_ctx) == 0) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
+ goto f_err;
+ }
+
+ /*
+ * The ECC/TLS specification does not mention the use of DSA to sign
+ * ECParameters in the server key exchange message. We do support RSA
+ * and ECDSA.
+ */
+ if (0) ;
+# ifndef OPENSSL_NO_RSA
+ else if (alg_a & SSL_aRSA)
+ pkey = X509_get_pubkey(s->session->peer);
+# endif
+# ifndef OPENSSL_NO_EC
+ else if (alg_a & SSL_aECDSA)
+ pkey = X509_get_pubkey(s->session->peer);
+# endif
+ /* else anonymous ECDH, so no certificate or pkey. */
+ EC_KEY_set_public_key(ecdh, srvr_ecpoint);
+ s->s3->peer_ecdh_tmp = ecdh;
+ ecdh = NULL;
+ BN_CTX_free(bn_ctx);
+ bn_ctx = NULL;
+ EC_POINT_free(srvr_ecpoint);
+ srvr_ecpoint = NULL;
+ } else if (alg_k) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+#endif /* !OPENSSL_NO_EC */
+
+ /* if it was signed, check the signature */
+ if (pkey != NULL) {
+ PACKET params;
+ /*
+ * |pkt| now points to the beginning of the signature, so the difference
+ * equals the length of the parameters.
+ */
+ if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
+ PACKET_remaining(&save_param_start) -
+ PACKET_remaining(pkt))) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+ if (SSL_USE_SIGALGS(s)) {
+ unsigned char *sigalgs;
+ int rv;
+ if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
+ if (rv == -1)
+ goto err;
+ else if (rv == 0) {
+ goto f_err;
+ }
+#ifdef SSL_DEBUG
+ fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
+#endif
+ } else {
+ md = EVP_sha1();
+ }
+
+ if (!PACKET_get_length_prefixed_2(pkt, &signature)
+ || PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ j = EVP_PKEY_size(pkey);
+ if (j < 0) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+ /*
+ * Check signature length
+ */
+ if (PACKET_remaining(&signature) > (size_t)j) {
+ /* wrong packet length */
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
+ goto f_err;
+ }
+#ifndef OPENSSL_NO_RSA
+ if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
+ int num;
+ unsigned int size;
+
+ j = 0;
+ q = md_buf;
+ for (num = 2; num > 0; num--) {
+ EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ EVP_DigestInit_ex(&md_ctx, (num == 2)
+ ? s->ctx->md5 : s->ctx->sha1, NULL);
+ EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms),
+ PACKET_remaining(¶ms));
+ EVP_DigestFinal_ex(&md_ctx, q, &size);
+ q += size;
+ j += size;
+ }
+ verify_ret =
+ RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature),
+ PACKET_remaining(&signature), pkey->pkey.rsa);
+ if (verify_ret < 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
+ goto f_err;
+ }
+ if (verify_ret == 0) {
+ /* bad signature */
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
+ goto f_err;
+ }
+ } else
+#endif
+ {
+ EVP_VerifyInit_ex(&md_ctx, md, NULL);
+ EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms),
+ PACKET_remaining(¶ms));
+ if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature),
+ PACKET_remaining(&signature), pkey) <= 0) {
+ /* bad signature */
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
+ goto f_err;
+ }
+ }
+ } else {
+ /* aNULL, aSRP or PSK do not need public keys */
+ if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
+ /* Might be wrong key type, check it */
+ if (ssl3_check_cert_and_algorithm(s))
+ /* Otherwise this shouldn't happen */
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ /* still data left over */
+ if (PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
+ goto f_err;
+ }
+ }
+ EVP_PKEY_free(pkey);
+ EVP_MD_CTX_cleanup(&md_ctx);
+ return MSG_PROCESS_CONTINUE_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ EVP_PKEY_free(pkey);
+#ifndef OPENSSL_NO_RSA
+ RSA_free(rsa);
+#endif
+#ifndef OPENSSL_NO_DH
+ DH_free(dh);
+#endif
+#ifndef OPENSSL_NO_EC
+ BN_CTX_free(bn_ctx);
+ EC_POINT_free(srvr_ecpoint);
+ EC_KEY_free(ecdh);
+#endif
+ EVP_MD_CTX_cleanup(&md_ctx);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
+{
+ int ret = MSG_PROCESS_ERROR;
+ unsigned int list_len, ctype_num, i, name_len;
+ X509_NAME *xn = NULL;
+ unsigned char *data;
+ unsigned char *namestart, *namebytes;
+ STACK_OF(X509_NAME) *ca_sk = NULL;
+
+ if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* get the certificate types */
+ if (!PACKET_get_1(pkt, &ctype_num)
+ || !PACKET_get_bytes(pkt, &data, ctype_num)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+ OPENSSL_free(s->cert->ctypes);
+ s->cert->ctypes = NULL;
+ if (ctype_num > SSL3_CT_NUMBER) {
+ /* If we exceed static buffer copy all to cert structure */
+ s->cert->ctypes = OPENSSL_malloc(ctype_num);
+ if (s->cert->ctypes == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ memcpy(s->cert->ctypes, data, ctype_num);
+ s->cert->ctype_num = (size_t)ctype_num;
+ ctype_num = SSL3_CT_NUMBER;
+ }
+ for (i = 0; i < ctype_num; i++)
+ s->s3->tmp.ctype[i] = data[i];
+
+ if (SSL_USE_SIGALGS(s)) {
+ if (!PACKET_get_net_2(pkt, &list_len)
+ || !PACKET_get_bytes(pkt, &data, list_len)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ /* Clear certificate digests and validity flags */
+ for (i = 0; i < SSL_PKEY_NUM; i++) {
+ s->s3->tmp.md[i] = NULL;
+ s->s3->tmp.valid_flags[i] = 0;
+ }
+ if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_SIGNATURE_ALGORITHMS_ERROR);
+ goto err;
+ }
+ if (!tls1_process_sigalgs(s)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+
+ /* get the CA RDNs */
+ if (!PACKET_get_net_2(pkt, &list_len)
+ || PACKET_remaining(pkt) != list_len) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ while (PACKET_remaining(pkt)) {
+ if (!PACKET_get_net_2(pkt, &name_len)
+ || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ namestart = namebytes;
+
+ if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
+ name_len)) == NULL) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
+ goto err;
+ }
+
+ if (namebytes != (namestart + name_len)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_CA_DN_LENGTH_MISMATCH);
+ goto err;
+ }
+ if (!sk_X509_NAME_push(ca_sk, xn)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+
+ /* we should setup a certificate to return.... */
+ s->s3->tmp.cert_req = 1;
+ s->s3->tmp.ctype_num = ctype_num;
+ sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
+ s->s3->tmp.ca_names = ca_sk;
+ ca_sk = NULL;
+
+ ret = MSG_PROCESS_CONTINUE_READING;
+ goto done;
+ err:
+ statem_set_error(s);
+ done:
+ sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
+ return ret;
+}
+
+static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
+{
+ return (X509_NAME_cmp(*a, *b));
+}
+
+enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
+{
+ int al;
+ unsigned int ticklen;
+ unsigned long ticket_lifetime_hint;
+
+ if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
+ || !PACKET_get_net_2(pkt, &ticklen)
+ || PACKET_remaining(pkt) != ticklen) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ /* Server is allowed to change its mind and send an empty ticket. */
+ if (ticklen == 0)
+ return 1;
+
+ if (s->session->session_id_length > 0) {
+ int i = s->session_ctx->session_cache_mode;
+ SSL_SESSION *new_sess;
+ /*
+ * We reused an existing session, so we need to replace it with a new
+ * one
+ */
+ if (i & SSL_SESS_CACHE_CLIENT) {
+ /*
+ * Remove the old session from the cache
+ */
+ if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
+ if (s->session_ctx->remove_session_cb != NULL)
+ s->session_ctx->remove_session_cb(s->session_ctx,
+ s->session);
+ } else {
+ /* We carry on if this fails */
+ SSL_CTX_remove_session(s->session_ctx, s->session);
+ }
+ }
+
+ if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+
+ SSL_SESSION_free(s->session);
+ s->session = new_sess;
+ }
+
+ OPENSSL_free(s->session->tlsext_tick);
+ s->session->tlsext_ticklen = 0;
+
+ s->session->tlsext_tick = OPENSSL_malloc(ticklen);
+ if (!s->session->tlsext_tick) {
+ SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
+ s->session->tlsext_ticklen = ticklen;
+ /*
+ * There are two ways to detect a resumed ticket session. One is to set
+ * an appropriate session ID and then the server must return a match in
+ * ServerHello. This allows the normal client session ID matching to work
+ * and we know much earlier that the ticket has been accepted. The
+ * other way is to set zero length session ID when the ticket is
+ * presented and rely on the handshake to determine session resumption.
+ * We choose the former approach because this fits in with assumptions
+ * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
+ * SHA256 is disabled) hash of the ticket.
+ */
+ EVP_Digest(s->session->tlsext_tick, ticklen,
+ s->session->session_id, &s->session->session_id_length,
+ EVP_sha256(), NULL);
+ return MSG_PROCESS_CONTINUE_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
+{
+ int al;
+ unsigned long resplen;
+ unsigned int type;
+
+ if (!PACKET_get_1(pkt, &type)
+ || type != TLSEXT_STATUSTYPE_ocsp) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
+ goto f_err;
+ }
+ if (!PACKET_get_net_3(pkt, &resplen)
+ || PACKET_remaining(pkt) != resplen) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ OPENSSL_free(s->tlsext_ocsp_resp);
+ s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
+ if (!s->tlsext_ocsp_resp) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+ if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ s->tlsext_ocsp_resplen = resplen;
+ if (s->ctx->tlsext_status_cb) {
+ int ret;
+ ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
+ if (ret == 0) {
+ al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
+ goto f_err;
+ }
+ if (ret < 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+ }
+ return MSG_PROCESS_CONTINUE_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
+{
+ if (PACKET_remaining(pkt) > 0) {
+ /* should contain no data */
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+ }
+
+#ifndef OPENSSL_NO_SRP
+ if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
+ if (SRP_Calc_A_param(s) <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+ }
+ }
+#endif
+
+#ifndef OPENSSL_NO_SCTP
+ /* Only applies to renegotiation */
+ if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
+ && s->renegotiate != 0)
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ else
+#endif
+ return MSG_PROCESS_FINISHED_READING;
+}
+
+int tls_construct_client_key_exchange(SSL *s)
+{
+ unsigned char *p;
+ int n;
+#ifndef OPENSSL_NO_PSK
+ size_t pskhdrlen = 0;
+#endif
+ unsigned long alg_k;
+#ifndef OPENSSL_NO_RSA
+ unsigned char *q;
+ EVP_PKEY *pkey = NULL;
+#endif
+#ifndef OPENSSL_NO_EC
+ EC_KEY *clnt_ecdh = NULL;
+ const EC_POINT *srvr_ecpoint = NULL;
+ EVP_PKEY *srvr_pub_pkey = NULL;
+ unsigned char *encodedPoint = NULL;
+ int encoded_pt_len = 0;
+ BN_CTX *bn_ctx = NULL;
+#endif
+ unsigned char *pms = NULL;
+ size_t pmslen = 0;
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ p = ssl_handshake_start(s);
+
+
+#ifndef OPENSSL_NO_PSK
+ if (alg_k & SSL_PSK) {
+ int psk_err = 1;
+ /*
+ * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
+ * \0-terminated identity. The last byte is for us for simulating
+ * strnlen.
+ */
+ char identity[PSK_MAX_IDENTITY_LEN + 1];
+ size_t identitylen;
+ unsigned char psk[PSK_MAX_PSK_LEN];
+ size_t psklen;
+
+ if (s->psk_client_callback == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_NO_CLIENT_CB);
+ goto err;
+ }
+
+ memset(identity, 0, sizeof(identity));
+
+ psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
+ identity, sizeof(identity) - 1,
+ psk, sizeof(psk));
+
+ if (psklen > PSK_MAX_PSK_LEN) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto psk_err;
+ } else if (psklen == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_IDENTITY_NOT_FOUND);
+ goto psk_err;
+ }
+
+ OPENSSL_free(s->s3->tmp.psk);
+ s->s3->tmp.psk = BUF_memdup(psk, psklen);
+ OPENSSL_cleanse(psk, psklen);
+
+ if (s->s3->tmp.psk == NULL) {
+ OPENSSL_cleanse(identity, sizeof(identity));
+ goto memerr;
+ }
+
+ s->s3->tmp.psklen = psklen;
+
+ identitylen = strlen(identity);
+ if (identitylen > PSK_MAX_IDENTITY_LEN) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto psk_err;
+ }
+ OPENSSL_free(s->session->psk_identity);
+ s->session->psk_identity = BUF_strdup(identity);
+ if (s->session->psk_identity == NULL) {
+ OPENSSL_cleanse(identity, sizeof(identity));
+ goto memerr;
+ }
+
+ s2n(identitylen, p);
+ memcpy(p, identity, identitylen);
+ pskhdrlen = 2 + identitylen;
+ p += identitylen;
+ psk_err = 0;
+psk_err:
+ OPENSSL_cleanse(identity, sizeof(identity));
+ if (psk_err != 0) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ goto err;
+ }
+ }
+ if (alg_k & SSL_kPSK) {
+ n = 0;
+ } else
+#endif
+
+ /* Fool emacs indentation */
+ if (0) {
+ }
+#ifndef OPENSSL_NO_RSA
+ else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
+ RSA *rsa;
+ pmslen = SSL_MAX_MASTER_KEY_LENGTH;
+ pms = OPENSSL_malloc(pmslen);
+ if (!pms)
+ goto memerr;
+
+ if (s->session->peer == NULL) {
+ /*
+ * We should always have a server certificate with SSL_kRSA.
+ */
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (s->s3->peer_rsa_tmp != NULL)
+ rsa = s->s3->peer_rsa_tmp;
+ else {
+ pkey = X509_get_pubkey(s->session->peer);
+ if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
+ || (pkey->pkey.rsa == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ EVP_PKEY_free(pkey);
+ goto err;
+ }
+ rsa = pkey->pkey.rsa;
+ EVP_PKEY_free(pkey);
+ }
+
+ pms[0] = s->client_version >> 8;
+ pms[1] = s->client_version & 0xff;
+ if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
+ goto err;
+
+ q = p;
+ /* Fix buf for TLS and beyond */
+ if (s->version > SSL3_VERSION)
+ p += 2;
+ n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
+# ifdef PKCS1_CHECK
+ if (s->options & SSL_OP_PKCS1_CHECK_1)
+ p[1]++;
+ if (s->options & SSL_OP_PKCS1_CHECK_2)
+ tmp_buf[0] = 0x70;
+# endif
+ if (n <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_BAD_RSA_ENCRYPT);
+ goto err;
+ }
+
+ /* Fix buf for TLS and beyond */
+ if (s->version > SSL3_VERSION) {
+ s2n(n, q);
+ n += 2;
+ }
+ }
+#endif
+#ifndef OPENSSL_NO_DH
+ else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
+ DH *dh_srvr, *dh_clnt;
+ if (s->s3->peer_dh_tmp != NULL)
+ dh_srvr = s->s3->peer_dh_tmp;
+ else {
+ /* we get them from the cert */
+ EVP_PKEY *spkey = NULL;
+ dh_srvr = NULL;
+ spkey = X509_get_pubkey(s->session->peer);
+ if (spkey) {
+ dh_srvr = EVP_PKEY_get1_DH(spkey);
+ EVP_PKEY_free(spkey);
+ }
+ if (dh_srvr == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ }
+ if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
+ /* Use client certificate key */
+ EVP_PKEY *clkey = s->cert->key->privatekey;
+ dh_clnt = NULL;
+ if (clkey)
+ dh_clnt = EVP_PKEY_get1_DH(clkey);
+ if (dh_clnt == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ } else {
+ /* generate a new random key */
+ if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
+ goto err;
+ }
+ if (!DH_generate_key(dh_clnt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
+ DH_free(dh_clnt);
+ goto err;
+ }
+ }
+
+ pmslen = DH_size(dh_clnt);
+ pms = OPENSSL_malloc(pmslen);
+ if (!pms)
+ goto memerr;
+
+ /*
+ * use the 'p' output buffer for the DH key, but make sure to
+ * clear it out afterwards
+ */
+
+ n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
+ if (s->s3->peer_dh_tmp == NULL)
+ DH_free(dh_srvr);
+
+ if (n <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
+ DH_free(dh_clnt);
+ goto err;
+ }
+ pmslen = n;
+
+ if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
+ n = 0;
+ else {
+ /* send off the data */
+ n = BN_num_bytes(dh_clnt->pub_key);
+ s2n(n, p);
+ BN_bn2bin(dh_clnt->pub_key, p);
+ n += 2;
+ }
+
+ DH_free(dh_clnt);
+ }
+#endif
+
+#ifndef OPENSSL_NO_EC
+ else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
+ const EC_GROUP *srvr_group = NULL;
+ EC_KEY *tkey;
+ int ecdh_clnt_cert = 0;
+ int field_size = 0;
+ /*
+ * Did we send out the client's ECDH share for use in premaster
+ * computation as part of client certificate? If so, set
+ * ecdh_clnt_cert to 1.
+ */
+ if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
+ /*-
+ * XXX: For now, we do not support client
+ * authentication using ECDH certificates.
+ * To add such support, one needs to add
+ * code that checks for appropriate
+ * conditions and sets ecdh_clnt_cert to 1.
+ * For example, the cert have an ECC
+ * key on the same curve as the server's
+ * and the key should be authorized for
+ * key agreement.
+ *
+ * One also needs to add code in ssl3_connect
+ * to skip sending the certificate verify
+ * message.
+ *
+ * if ((s->cert->key->privatekey != NULL) &&
+ * (s->cert->key->privatekey->type ==
+ * EVP_PKEY_EC) && ...)
+ * ecdh_clnt_cert = 1;
+ */
+ }
+
+ if (s->s3->peer_ecdh_tmp != NULL) {
+ tkey = s->s3->peer_ecdh_tmp;
+ } else {
+ /* Get the Server Public Key from Cert */
+ srvr_pub_pkey = X509_get_pubkey(s->session->peer);
+ if ((srvr_pub_pkey == NULL)
+ || (srvr_pub_pkey->type != EVP_PKEY_EC)
+ || (srvr_pub_pkey->pkey.ec == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ tkey = srvr_pub_pkey->pkey.ec;
+ }
+
+ srvr_group = EC_KEY_get0_group(tkey);
+ srvr_ecpoint = EC_KEY_get0_public_key(tkey);
+
+ if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if ((clnt_ecdh = EC_KEY_new()) == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ if (ecdh_clnt_cert) {
+ /*
+ * Reuse key info from our certificate We only need our
+ * private key to perform the ECDH computation.
+ */
+ const BIGNUM *priv_key;
+ tkey = s->cert->key->privatekey->pkey.ec;
+ priv_key = EC_KEY_get0_private_key(tkey);
+ if (priv_key == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ } else {
+ /* Generate a new ECDH key pair */
+ if (!(EC_KEY_generate_key(clnt_ecdh))) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_ECDH_LIB);
+ goto err;
+ }
+ }
+
+ /*
+ * use the 'p' output buffer for the ECDH key, but make sure to
+ * clear it out afterwards
+ */
+
+ field_size = EC_GROUP_get_degree(srvr_group);
+ if (field_size <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+ pmslen = (field_size + 7) / 8;
+ pms = OPENSSL_malloc(pmslen);
+ if (!pms)
+ goto memerr;
+ n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
+ if (n <= 0 || pmslen != (size_t)n) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ if (ecdh_clnt_cert) {
+ /* Send empty client key exch message */
+ n = 0;
+ } else {
+ /*
+ * First check the size of encoding and allocate memory
+ * accordingly.
+ */
+ encoded_pt_len =
+ EC_POINT_point2oct(srvr_group,
+ EC_KEY_get0_public_key(clnt_ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ NULL, 0, NULL);
+
+ encodedPoint = (unsigned char *)
+ OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
+ bn_ctx = BN_CTX_new();
+ if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Encode the public key */
+ n = EC_POINT_point2oct(srvr_group,
+ EC_KEY_get0_public_key(clnt_ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ encodedPoint, encoded_pt_len, bn_ctx);
+
+ *p = n; /* length of encoded point */
+ /* Encoded point will be copied here */
+ p += 1;
+ /* copy the point */
+ memcpy(p, encodedPoint, n);
+ /* increment n to account for length field */
+ n += 1;
+ }
+
+ /* Free allocated memory */
+ BN_CTX_free(bn_ctx);
+ OPENSSL_free(encodedPoint);
+ EC_KEY_free(clnt_ecdh);
+ EVP_PKEY_free(srvr_pub_pkey);
+ }
+#endif /* !OPENSSL_NO_EC */
+ else if (alg_k & SSL_kGOST) {
+ /* GOST key exchange message creation */
+ EVP_PKEY_CTX *pkey_ctx;
+ X509 *peer_cert;
+ size_t msglen;
+ unsigned int md_len;
+ unsigned char shared_ukm[32], tmp[256];
+ EVP_MD_CTX *ukm_hash;
+ EVP_PKEY *pub_key;
+
+ pmslen = 32;
+ pms = OPENSSL_malloc(pmslen);
+ if (!pms)
+ goto memerr;
+
+ /*
+ * Get server sertificate PKEY and create ctx from it
+ */
+ peer_cert = s->session->peer;
+ if (!peer_cert) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
+ goto err;
+ }
+
+ pkey_ctx = EVP_PKEY_CTX_new(pub_key =
+ X509_get_pubkey(peer_cert), NULL);
+ /*
+ * If we have send a certificate, and certificate key
+ *
+ * * parameters match those of server certificate, use
+ * certificate key for key exchange
+ */
+
+ /* Otherwise, generate ephemeral key pair */
+
+ EVP_PKEY_encrypt_init(pkey_ctx);
+ /* Generate session key */
+ if (RAND_bytes(pms, pmslen) <= 0) {
+ EVP_PKEY_CTX_free(pkey_ctx);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ };
+ /*
+ * If we have client certificate, use its secret as peer key
+ */
+ if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
+ if (EVP_PKEY_derive_set_peer
+ (pkey_ctx, s->cert->key->privatekey) <= 0) {
+ /*
+ * If there was an error - just ignore it. Ephemeral key
+ * * would be used
+ */
+ ERR_clear_error();
+ }
+ }
+ /*
+ * Compute shared IV and store it in algorithm-specific context
+ * data
+ */
+ ukm_hash = EVP_MD_CTX_create();
+ EVP_DigestInit(ukm_hash,
+ EVP_get_digestbynid(NID_id_GostR3411_94));
+ EVP_DigestUpdate(ukm_hash, s->s3->client_random,
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(ukm_hash, s->s3->server_random,
+ SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
+ EVP_MD_CTX_destroy(ukm_hash);
+ if (EVP_PKEY_CTX_ctrl
+ (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
+ shared_ukm) < 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_LIBRARY_BUG);
+ goto err;
+ }
+ /* Make GOST keytransport blob message */
+ /*
+ * Encapsulate it into sequence
+ */
+ *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
+ msglen = 255;
+ if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ SSL_R_LIBRARY_BUG);
+ goto err;
+ }
+ if (msglen >= 0x80) {
+ *(p++) = 0x81;
+ *(p++) = msglen & 0xff;
+ n = msglen + 3;
+ } else {
+ *(p++) = msglen & 0xff;
+ n = msglen + 2;
+ }
+ memcpy(p, tmp, msglen);
+ /* Check if pubkey from client certificate was used */
+ if (EVP_PKEY_CTX_ctrl
+ (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
+ /* Set flag "skip certificate verify" */
+ s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
+ }
+ EVP_PKEY_CTX_free(pkey_ctx);
+ EVP_PKEY_free(pub_key);
+
+ }
+#ifndef OPENSSL_NO_SRP
+ else if (alg_k & SSL_kSRP) {
+ if (s->srp_ctx.A != NULL) {
+ /* send off the data */
+ n = BN_num_bytes(s->srp_ctx.A);
+ s2n(n, p);
+ BN_bn2bin(s->srp_ctx.A, p);
+ n += 2;
+ } else {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ OPENSSL_free(s->session->srp_username);
+ s->session->srp_username = BUF_strdup(s->srp_ctx.login);
+ if (s->session->srp_username == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+#endif
+ else {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+#ifndef OPENSSL_NO_PSK
+ n += pskhdrlen;
+#endif
+
+ if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ s->s3->tmp.pms = pms;
+ s->s3->tmp.pmslen = pmslen;
+
+ return 1;
+ memerr:
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ err:
+ OPENSSL_clear_free(pms, pmslen);
+ s->s3->tmp.pms = NULL;
+#ifndef OPENSSL_NO_EC
+ BN_CTX_free(bn_ctx);
+ OPENSSL_free(encodedPoint);
+ EC_KEY_free(clnt_ecdh);
+ EVP_PKEY_free(srvr_pub_pkey);
+#endif
+#ifndef OPENSSL_NO_PSK
+ OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
+ s->s3->tmp.psk = NULL;
+#endif
+ statem_set_error(s);
+ return 0;
+}
+
+int tls_client_key_exchange_post_work(SSL *s)
+{
+ unsigned char *pms = NULL;
+ size_t pmslen = 0;
+
+#ifndef OPENSSL_NO_SRP
+ /* Check for SRP */
+ if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
+ if (!srp_generate_client_master_secret(s)) {
+ SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ return 1;
+ }
+#endif
+ pms = s->s3->tmp.pms;
+ pmslen = s->s3->tmp.pmslen;
+
+ if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s)) {
+ unsigned char sctpauthkey[64];
+ char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+
+ /*
+ * Add new shared key for SCTP-Auth, will be ignored if no SCTP
+ * used.
+ */
+ snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ if (SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0) <= 0)
+ goto err;
+
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+ }
+#endif
+
+ return 1;
+ err:
+ OPENSSL_clear_free(pms, pmslen);
+ s->s3->tmp.pms = NULL;
+ return 0;
+}
+
+int tls_construct_client_verify(SSL *s)
+{
+ unsigned char *p;
+ unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
+ EVP_PKEY *pkey;
+ EVP_PKEY_CTX *pctx = NULL;
+ EVP_MD_CTX mctx;
+ unsigned u = 0;
+ unsigned long n;
+ int j;
+
+ EVP_MD_CTX_init(&mctx);
+
+ p = ssl_handshake_start(s);
+ pkey = s->cert->key->privatekey;
+/* Create context from key and test if sha1 is allowed as digest */
+ pctx = EVP_PKEY_CTX_new(pkey, NULL);
+ EVP_PKEY_sign_init(pctx);
+ if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
+ if (!SSL_USE_SIGALGS(s))
+ s->method->ssl3_enc->cert_verify_mac(s,
+ NID_sha1,
+ &(data
+ [MD5_DIGEST_LENGTH]));
+ } else {
+ ERR_clear_error();
+ }
+ /*
+ * For TLS v1.2 send signature algorithm and signature using agreed
+ * digest and cached handshake records.
+ */
+ if (SSL_USE_SIGALGS(s)) {
+ long hdatalen = 0;
+ void *hdata;
+ const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
+ hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
+ if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ p += 2;
+#ifdef SSL_DEBUG
+ fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
+ EVP_MD_name(md));
+#endif
+ if (!EVP_SignInit_ex(&mctx, md, NULL)
+ || !EVP_SignUpdate(&mctx, hdata, hdatalen)
+ || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
+ goto err;
+ }
+ s2n(u, p);
+ n = u + 4;
+ /* Digest cached records and discard handshake buffer */
+ if (!ssl3_digest_cached_records(s, 0))
+ goto err;
+ } else
+#ifndef OPENSSL_NO_RSA
+ if (pkey->type == EVP_PKEY_RSA) {
+ s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
+ if (RSA_sign(NID_md5_sha1, data,
+ MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
+ &(p[2]), &u, pkey->pkey.rsa) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB);
+ goto err;
+ }
+ s2n(u, p);
+ n = u + 2;
+ } else
+#endif
+#ifndef OPENSSL_NO_DSA
+ if (pkey->type == EVP_PKEY_DSA) {
+ if (!DSA_sign(pkey->save_type,
+ &(data[MD5_DIGEST_LENGTH]),
+ SHA_DIGEST_LENGTH, &(p[2]),
+ (unsigned int *)&j, pkey->pkey.dsa)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB);
+ goto err;
+ }
+ s2n(j, p);
+ n = j + 2;
+ } else
+#endif
+#ifndef OPENSSL_NO_EC
+ if (pkey->type == EVP_PKEY_EC) {
+ if (!ECDSA_sign(pkey->save_type,
+ &(data[MD5_DIGEST_LENGTH]),
+ SHA_DIGEST_LENGTH, &(p[2]),
+ (unsigned int *)&j, pkey->pkey.ec)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
+ goto err;
+ }
+ s2n(j, p);
+ n = j + 2;
+ } else
+#endif
+ if (pkey->type == NID_id_GostR3410_2001) {
+ unsigned char signbuf[64];
+ int i;
+ size_t sigsize = 64;
+ s->method->ssl3_enc->cert_verify_mac(s,
+ NID_id_GostR3411_94, data);
+ if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ for (i = 63, j = 0; i >= 0; j++, i--) {
+ p[2 + j] = signbuf[i];
+ }
+ s2n(j, p);
+ n = j + 2;
+ } else {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ EVP_MD_CTX_cleanup(&mctx);
+ EVP_PKEY_CTX_free(pctx);
+ return 1;
+ err:
+ EVP_MD_CTX_cleanup(&mctx);
+ EVP_PKEY_CTX_free(pctx);
+ return 0;
+}
+
+/*
+ * Check a certificate can be used for client authentication. Currently check
+ * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
+ * certificates can be used and optionally checks suitability for Suite B.
+ */
+static int ssl3_check_client_certificate(SSL *s)
+{
+ unsigned long alg_k;
+ if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
+ return 0;
+ /* If no suitable signature algorithm can't use certificate */
+ if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
+ return 0;
+ /*
+ * If strict mode check suitability of chain before using it. This also
+ * adjusts suite B digest if necessary.
+ */
+ if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
+ !tls1_check_chain(s, NULL, NULL, NULL, -2))
+ return 0;
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+ /* See if we can use client certificate for fixed DH */
+ if (alg_k & (SSL_kDHr | SSL_kDHd)) {
+ int i = s->session->peer_type;
+ EVP_PKEY *clkey = NULL, *spkey = NULL;
+ clkey = s->cert->key->privatekey;
+ /* If client key not DH assume it can be used */
+ if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
+ return 1;
+ if (i >= 0)
+ spkey = X509_get_pubkey(s->session->peer);
+ if (spkey) {
+ /* Compare server and client parameters */
+ i = EVP_PKEY_cmp_parameters(clkey, spkey);
+ EVP_PKEY_free(spkey);
+ if (i != 1)
+ return 0;
+ }
+ s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
+ }
+ return 1;
+}
+
+enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst)
+{
+ X509 *x509 = NULL;
+ EVP_PKEY *pkey = NULL;
+ int i;
+
+ if (wst == WORK_MORE_A) {
+ /* Let cert callback update client certificates if required */
+ if (s->cert->cert_cb) {
+ i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
+ if (i < 0) {
+ s->rwstate = SSL_X509_LOOKUP;
+ return WORK_MORE_A;
+ }
+ if (i == 0) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+ s->rwstate = SSL_NOTHING;
+ }
+ if (ssl3_check_client_certificate(s))
+ return WORK_FINISHED_CONTINUE;
+
+ /* Fall through to WORK_MORE_B */
+ wst = WORK_MORE_B;
+ }
+
+ /* We need to get a client cert */
+ if (wst == WORK_MORE_B) {
+ /*
+ * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
+ * return(-1); We then get retied later
+ */
+ i = ssl_do_client_cert_cb(s, &x509, &pkey);
+ if (i < 0) {
+ s->rwstate = SSL_X509_LOOKUP;
+ return WORK_MORE_B;
+ }
+ s->rwstate = SSL_NOTHING;
+ if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
+ if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
+ i = 0;
+ } else if (i == 1) {
+ i = 0;
+ SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
+ SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
+ }
+
+ X509_free(x509);
+ EVP_PKEY_free(pkey);
+ if (i && !ssl3_check_client_certificate(s))
+ i = 0;
+ if (i == 0) {
+ if (s->version == SSL3_VERSION) {
+ s->s3->tmp.cert_req = 0;
+ ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
+ return WORK_FINISHED_CONTINUE;
+ } else {
+ s->s3->tmp.cert_req = 2;
+ if (!ssl3_digest_cached_records(s, 0)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+ }
+ }
+
+ return WORK_FINISHED_CONTINUE;
+ }
+
+ /* Shouldn't ever get here */
+ return WORK_ERROR;
+}
+
+int tls_construct_client_certificate(SSL *s)
+{
+ if (!ssl3_output_cert_chain(s,
+ (s->s3->tmp.cert_req ==
+ 2) ? NULL : s->cert->key)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ return 1;
+}
+
+#define has_bits(i,m) (((i)&(m)) == (m))
+
+int ssl3_check_cert_and_algorithm(SSL *s)
+{
+ int i, idx;
+ long alg_k, alg_a;
+ EVP_PKEY *pkey = NULL;
+ int pkey_bits;
+#ifndef OPENSSL_NO_RSA
+ RSA *rsa;
+#endif
+#ifndef OPENSSL_NO_DH
+ DH *dh;
+#endif
+ int al = SSL_AD_HANDSHAKE_FAILURE;
+
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+ alg_a = s->s3->tmp.new_cipher->algorithm_auth;
+
+ /* we don't have a certificate */
+ if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
+ return (1);
+#ifndef OPENSSL_NO_RSA
+ rsa = s->s3->peer_rsa_tmp;
+#endif
+#ifndef OPENSSL_NO_DH
+ dh = s->s3->peer_dh_tmp;
+#endif
+
+ /* This is the passed certificate */
+
+ idx = s->session->peer_type;
+#ifndef OPENSSL_NO_EC
+ if (idx == SSL_PKEY_ECC) {
+ if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
+ /* check failed */
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
+ goto f_err;
+ } else {
+ return 1;
+ }
+ } else if (alg_a & SSL_aECDSA) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_ECDSA_SIGNING_CERT);
+ goto f_err;
+ } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
+ goto f_err;
+ }
+#endif
+ pkey = X509_get_pubkey(s->session->peer);
+ pkey_bits = EVP_PKEY_bits(pkey);
+ i = X509_certificate_type(s->session->peer, pkey);
+ EVP_PKEY_free(pkey);
+
+ /* Check that we have a certificate if we require one */
+ if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_RSA_SIGNING_CERT);
+ goto f_err;
+ }
+#ifndef OPENSSL_NO_DSA
+ else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_DSA_SIGNING_CERT);
+ goto f_err;
+ }
+#endif
+#ifndef OPENSSL_NO_RSA
+ if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
+ if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
+ !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_RSA_ENCRYPTING_CERT);
+ goto f_err;
+ } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
+ if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
+ if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_RSA_ENCRYPTING_CERT);
+ goto f_err;
+ }
+ if (rsa != NULL) {
+ /* server key exchange is not allowed. */
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ }
+ }
+ }
+#endif
+#ifndef OPENSSL_NO_DH
+ if ((alg_k & SSL_kDHE) && (dh == NULL)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
+ !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_DH_RSA_CERT);
+ goto f_err;
+ }
+# ifndef OPENSSL_NO_DSA
+ else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
+ !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_DH_DSA_CERT);
+ goto f_err;
+ }
+# endif
+#endif
+
+ if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
+ pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
+#ifndef OPENSSL_NO_RSA
+ if (alg_k & SSL_kRSA) {
+ if (rsa == NULL) {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
+ goto f_err;
+ } else if (RSA_bits(rsa) >
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
+ /* We have a temporary RSA key but it's too large. */
+ al = SSL_AD_EXPORT_RESTRICTION;
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
+ goto f_err;
+ }
+ } else
+#endif
+#ifndef OPENSSL_NO_DH
+ if (alg_k & SSL_kDHE) {
+ if (DH_bits(dh) >
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
+ /* We have a temporary DH key but it's too large. */
+ al = SSL_AD_EXPORT_RESTRICTION;
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_EXPORT_TMP_DH_KEY);
+ goto f_err;
+ }
+ } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
+ /* The cert should have had an export DH key. */
+ al = SSL_AD_EXPORT_RESTRICTION;
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_MISSING_EXPORT_TMP_DH_KEY);
+ goto f_err;
+ } else
+#endif
+ {
+ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
+ SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
+ goto f_err;
+ }
+ }
+ return (1);
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ return (0);
+}
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+int tls_construct_next_proto(SSL *s)
+{
+ unsigned int len, padding_len;
+ unsigned char *d;
+
+ len = s->next_proto_negotiated_len;
+ padding_len = 32 - ((len + 2) % 32);
+ d = (unsigned char *)s->init_buf->data;
+ d[4] = len;
+ memcpy(d + 5, s->next_proto_negotiated, len);
+ d[5 + len] = padding_len;
+ memset(d + 6 + len, 0, padding_len);
+ *(d++) = SSL3_MT_NEXT_PROTO;
+ l2n3(2 + len + padding_len, d);
+ s->init_num = 4 + 2 + len + padding_len;
+ s->init_off = 0;
+
+ return 1;
+}
+#endif
+
+int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
+{
+ int i = 0;
+#ifndef OPENSSL_NO_ENGINE
+ if (s->ctx->client_cert_engine) {
+ i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
+ SSL_get_client_CA_list(s),
+ px509, ppkey, NULL, NULL, NULL);
+ if (i != 0)
+ return i;
+ }
+#endif
+ if (s->ctx->client_cert_cb)
+ i = s->ctx->client_cert_cb(s, px509, ppkey);
+ return i;
+}
+
+int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
+ unsigned char *p)
+{
+ int i, j = 0;
+ SSL_CIPHER *c;
+ unsigned char *q;
+ int empty_reneg_info_scsv = !s->renegotiate;
+ /* Set disabled masks for this session */
+ ssl_set_client_disabled(s);
+
+ if (sk == NULL)
+ return (0);
+ q = p;
+
+ for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
+ c = sk_SSL_CIPHER_value(sk, i);
+ /* Skip disabled ciphers */
+ if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
+ continue;
+#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
+ if (c->id == SSL3_CK_SCSV) {
+ if (!empty_reneg_info_scsv)
+ continue;
+ else
+ empty_reneg_info_scsv = 0;
+ }
+#endif
+ j = s->method->put_cipher_by_char(c, p);
+ p += j;
+ }
+ /*
+ * If p == q, no ciphers; caller indicates an error. Otherwise, add
+ * applicable SCSVs.
+ */
+ if (p != q) {
+ if (empty_reneg_info_scsv) {
+ static SSL_CIPHER scsv = {
+ 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ j = s->method->put_cipher_by_char(&scsv, p);
+ p += j;
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr,
+ "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
+#endif
+ }
+ if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
+ static SSL_CIPHER scsv = {
+ 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ j = s->method->put_cipher_by_char(&scsv, p);
+ p += j;
+ }
+ }
+
+ return (p - q);
+}
--- /dev/null
+/* ssl/statem/statem_dtls.c */
+/*
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <limits.h>
+#include <string.h>
+#include <stdio.h>
+#include "../ssl_locl.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#include <openssl/x509.h>
+
+#define RSMBLY_BITMASK_SIZE(msg_len) (((msg_len) + 7) / 8)
+
+#define RSMBLY_BITMASK_MARK(bitmask, start, end) { \
+ if ((end) - (start) <= 8) { \
+ long ii; \
+ for (ii = (start); ii < (end); ii++) bitmask[((ii) >> 3)] |= (1 << ((ii) & 7)); \
+ } else { \
+ long ii; \
+ bitmask[((start) >> 3)] |= bitmask_start_values[((start) & 7)]; \
+ for (ii = (((start) >> 3) + 1); ii < ((((end) - 1)) >> 3); ii++) bitmask[ii] = 0xff; \
+ bitmask[(((end) - 1) >> 3)] |= bitmask_end_values[((end) & 7)]; \
+ } }
+
+#define RSMBLY_BITMASK_IS_COMPLETE(bitmask, msg_len, is_complete) { \
+ long ii; \
+ OPENSSL_assert((msg_len) > 0); \
+ is_complete = 1; \
+ if (bitmask[(((msg_len) - 1) >> 3)] != bitmask_end_values[((msg_len) & 7)]) is_complete = 0; \
+ if (is_complete) for (ii = (((msg_len) - 1) >> 3) - 1; ii >= 0 ; ii--) \
+ if (bitmask[ii] != 0xff) { is_complete = 0; break; } }
+
+static unsigned char bitmask_start_values[] =
+ { 0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80 };
+static unsigned char bitmask_end_values[] =
+ { 0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f };
+
+static void dtls1_fix_message_header(SSL *s, unsigned long frag_off,
+ unsigned long frag_len);
+static unsigned char *dtls1_write_message_header(SSL *s, unsigned char *p);
+static void dtls1_set_message_header_int(SSL *s, unsigned char mt,
+ unsigned long len,
+ unsigned short seq_num,
+ unsigned long frag_off,
+ unsigned long frag_len);
+static int dtls_get_reassembled_message(SSL *s, long *len);
+
+static hm_fragment *dtls1_hm_fragment_new(unsigned long frag_len,
+ int reassembly)
+{
+ hm_fragment *frag = NULL;
+ unsigned char *buf = NULL;
+ unsigned char *bitmask = NULL;
+
+ frag = OPENSSL_malloc(sizeof(*frag));
+ if (frag == NULL)
+ return NULL;
+
+ if (frag_len) {
+ buf = OPENSSL_malloc(frag_len);
+ if (buf == NULL) {
+ OPENSSL_free(frag);
+ return NULL;
+ }
+ }
+
+ /* zero length fragment gets zero frag->fragment */
+ frag->fragment = buf;
+
+ /* Initialize reassembly bitmask if necessary */
+ if (reassembly) {
+ bitmask = OPENSSL_zalloc(RSMBLY_BITMASK_SIZE(frag_len));
+ if (bitmask == NULL) {
+ OPENSSL_free(buf);
+ OPENSSL_free(frag);
+ return NULL;
+ }
+ }
+
+ frag->reassembly = bitmask;
+
+ return frag;
+}
+
+void dtls1_hm_fragment_free(hm_fragment *frag)
+{
+ if (!frag)
+ return;
+ if (frag->msg_header.is_ccs) {
+ EVP_CIPHER_CTX_free(frag->msg_header.
+ saved_retransmit_state.enc_write_ctx);
+ EVP_MD_CTX_destroy(frag->msg_header.
+ saved_retransmit_state.write_hash);
+ }
+ OPENSSL_free(frag->fragment);
+ OPENSSL_free(frag->reassembly);
+ OPENSSL_free(frag);
+}
+
+/*
+ * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
+ * SSL3_RT_CHANGE_CIPHER_SPEC)
+ */
+int dtls1_do_write(SSL *s, int type)
+{
+ int ret;
+ unsigned int curr_mtu;
+ int retry = 1;
+ unsigned int len, frag_off, mac_size, blocksize, used_len;
+
+ if (!dtls1_query_mtu(s))
+ return -1;
+
+ OPENSSL_assert(s->d1->mtu >= dtls1_min_mtu(s)); /* should have something
+ * reasonable now */
+
+ if (s->init_off == 0 && type == SSL3_RT_HANDSHAKE)
+ OPENSSL_assert(s->init_num ==
+ (int)s->d1->w_msg_hdr.msg_len +
+ DTLS1_HM_HEADER_LENGTH);
+
+ if (s->write_hash) {
+ if (s->enc_write_ctx
+ && ((EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_GCM_MODE) ||
+ (EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CCM_MODE)))
+ mac_size = 0;
+ else
+ mac_size = EVP_MD_CTX_size(s->write_hash);
+ } else
+ mac_size = 0;
+
+ if (s->enc_write_ctx &&
+ (EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CBC_MODE))
+ blocksize = 2 * EVP_CIPHER_block_size(s->enc_write_ctx->cipher);
+ else
+ blocksize = 0;
+
+ frag_off = 0;
+ /* s->init_num shouldn't ever be < 0...but just in case */
+ while (s->init_num > 0) {
+ used_len = BIO_wpending(SSL_get_wbio(s)) + DTLS1_RT_HEADER_LENGTH
+ + mac_size + blocksize;
+ if (s->d1->mtu > used_len)
+ curr_mtu = s->d1->mtu - used_len;
+ else
+ curr_mtu = 0;
+
+ if (curr_mtu <= DTLS1_HM_HEADER_LENGTH) {
+ /*
+ * grr.. we could get an error if MTU picked was wrong
+ */
+ ret = BIO_flush(SSL_get_wbio(s));
+ if (ret <= 0)
+ return ret;
+ used_len = DTLS1_RT_HEADER_LENGTH + mac_size + blocksize;
+ if (s->d1->mtu > used_len + DTLS1_HM_HEADER_LENGTH) {
+ curr_mtu = s->d1->mtu - used_len;
+ } else {
+ /* Shouldn't happen */
+ return -1;
+ }
+ }
+
+ /*
+ * We just checked that s->init_num > 0 so this cast should be safe
+ */
+ if (((unsigned int)s->init_num) > curr_mtu)
+ len = curr_mtu;
+ else
+ len = s->init_num;
+
+ /* Shouldn't ever happen */
+ if (len > INT_MAX)
+ len = INT_MAX;
+
+ /*
+ * XDTLS: this function is too long. split out the CCS part
+ */
+ if (type == SSL3_RT_HANDSHAKE) {
+ if (s->init_off != 0) {
+ OPENSSL_assert(s->init_off > DTLS1_HM_HEADER_LENGTH);
+ s->init_off -= DTLS1_HM_HEADER_LENGTH;
+ s->init_num += DTLS1_HM_HEADER_LENGTH;
+
+ /*
+ * We just checked that s->init_num > 0 so this cast should
+ * be safe
+ */
+ if (((unsigned int)s->init_num) > curr_mtu)
+ len = curr_mtu;
+ else
+ len = s->init_num;
+ }
+
+ /* Shouldn't ever happen */
+ if (len > INT_MAX)
+ len = INT_MAX;
+
+ if (len < DTLS1_HM_HEADER_LENGTH) {
+ /*
+ * len is so small that we really can't do anything sensible
+ * so fail
+ */
+ return -1;
+ }
+ dtls1_fix_message_header(s, frag_off,
+ len - DTLS1_HM_HEADER_LENGTH);
+
+ dtls1_write_message_header(s,
+ (unsigned char *)&s->init_buf->
+ data[s->init_off]);
+ }
+
+ ret = dtls1_write_bytes(s, type, &s->init_buf->data[s->init_off],
+ len);
+ if (ret < 0) {
+ /*
+ * might need to update MTU here, but we don't know which
+ * previous packet caused the failure -- so can't really
+ * retransmit anything. continue as if everything is fine and
+ * wait for an alert to handle the retransmit
+ */
+ if (retry && BIO_ctrl(SSL_get_wbio(s),
+ BIO_CTRL_DGRAM_MTU_EXCEEDED, 0, NULL) > 0) {
+ if (!(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) {
+ if (!dtls1_query_mtu(s))
+ return -1;
+ /* Have one more go */
+ retry = 0;
+ } else
+ return -1;
+ } else {
+ return (-1);
+ }
+ } else {
+
+ /*
+ * bad if this assert fails, only part of the handshake message
+ * got sent. but why would this happen?
+ */
+ OPENSSL_assert(len == (unsigned int)ret);
+
+ if (type == SSL3_RT_HANDSHAKE && !s->d1->retransmitting) {
+ /*
+ * should not be done for 'Hello Request's, but in that case
+ * we'll ignore the result anyway
+ */
+ unsigned char *p =
+ (unsigned char *)&s->init_buf->data[s->init_off];
+ const struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
+ int xlen;
+
+ if (frag_off == 0 && s->version != DTLS1_BAD_VER) {
+ /*
+ * reconstruct message header is if it is being sent in
+ * single fragment
+ */
+ *p++ = msg_hdr->type;
+ l2n3(msg_hdr->msg_len, p);
+ s2n(msg_hdr->seq, p);
+ l2n3(0, p);
+ l2n3(msg_hdr->msg_len, p);
+ p -= DTLS1_HM_HEADER_LENGTH;
+ xlen = ret;
+ } else {
+ p += DTLS1_HM_HEADER_LENGTH;
+ xlen = ret - DTLS1_HM_HEADER_LENGTH;
+ }
+
+ ssl3_finish_mac(s, p, xlen);
+ }
+
+ if (ret == s->init_num) {
+ if (s->msg_callback)
+ s->msg_callback(1, s->version, type, s->init_buf->data,
+ (size_t)(s->init_off + s->init_num), s,
+ s->msg_callback_arg);
+
+ s->init_off = 0; /* done writing this message */
+ s->init_num = 0;
+
+ return (1);
+ }
+ s->init_off += ret;
+ s->init_num -= ret;
+ frag_off += (ret -= DTLS1_HM_HEADER_LENGTH);
+ }
+ }
+ return (0);
+}
+
+int dtls_get_message(SSL *s, int *mt, unsigned long *len)
+{
+ struct hm_header_st *msg_hdr;
+ unsigned char *p;
+ unsigned long msg_len;
+ int ok;
+ long tmplen;
+
+ msg_hdr = &s->d1->r_msg_hdr;
+ memset(msg_hdr, 0, sizeof(*msg_hdr));
+
+ again:
+ ok = dtls_get_reassembled_message(s, &tmplen);
+ if (tmplen == DTLS1_HM_BAD_FRAGMENT
+ || tmplen == DTLS1_HM_FRAGMENT_RETRY) {
+ /* bad fragment received */
+ goto again;
+ } else if (tmplen <= 0 && !ok) {
+ return 0;
+ }
+
+ *mt = s->s3->tmp.message_type;
+
+ p = (unsigned char *)s->init_buf->data;
+
+ if (*mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ if (s->msg_callback) {
+ s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
+ p, 1, s, s->msg_callback_arg);
+ }
+ /*
+ * This isn't a real handshake message so skip the processing below.
+ */
+ *len = (unsigned long)tmplen;
+ return 1;
+ }
+
+ msg_len = msg_hdr->msg_len;
+
+ /* reconstruct message header */
+ *(p++) = msg_hdr->type;
+ l2n3(msg_len, p);
+ s2n(msg_hdr->seq, p);
+ l2n3(0, p);
+ l2n3(msg_len, p);
+ if (s->version != DTLS1_BAD_VER) {
+ p -= DTLS1_HM_HEADER_LENGTH;
+ msg_len += DTLS1_HM_HEADER_LENGTH;
+ }
+
+ ssl3_finish_mac(s, p, msg_len);
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
+ p, msg_len, s, s->msg_callback_arg);
+
+ memset(msg_hdr, 0, sizeof(*msg_hdr));
+
+ s->d1->handshake_read_seq++;
+
+
+ s->init_msg = s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
+ *len = s->init_num;
+
+ return 1;
+}
+
+static int dtls1_preprocess_fragment(SSL *s, struct hm_header_st *msg_hdr)
+{
+ size_t frag_off, frag_len, msg_len;
+
+ msg_len = msg_hdr->msg_len;
+ frag_off = msg_hdr->frag_off;
+ frag_len = msg_hdr->frag_len;
+
+ /* sanity checking */
+ if ((frag_off + frag_len) > msg_len) {
+ SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE);
+ return SSL_AD_ILLEGAL_PARAMETER;
+ }
+
+ if (s->d1->r_msg_hdr.frag_off == 0) { /* first fragment */
+ /*
+ * msg_len is limited to 2^24, but is effectively checked against max
+ * above
+ */
+ if (!BUF_MEM_grow_clean
+ (s->init_buf, msg_len + DTLS1_HM_HEADER_LENGTH)) {
+ SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, ERR_R_BUF_LIB);
+ return SSL_AD_INTERNAL_ERROR;
+ }
+
+ s->s3->tmp.message_size = msg_len;
+ s->d1->r_msg_hdr.msg_len = msg_len;
+ s->s3->tmp.message_type = msg_hdr->type;
+ s->d1->r_msg_hdr.type = msg_hdr->type;
+ s->d1->r_msg_hdr.seq = msg_hdr->seq;
+ } else if (msg_len != s->d1->r_msg_hdr.msg_len) {
+ /*
+ * They must be playing with us! BTW, failure to enforce upper limit
+ * would open possibility for buffer overrun.
+ */
+ SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE);
+ return SSL_AD_ILLEGAL_PARAMETER;
+ }
+
+ return 0; /* no error */
+}
+
+static int dtls1_retrieve_buffered_fragment(SSL *s, int *ok)
+{
+ /*-
+ * (0) check whether the desired fragment is available
+ * if so:
+ * (1) copy over the fragment to s->init_buf->data[]
+ * (2) update s->init_num
+ */
+ pitem *item;
+ hm_fragment *frag;
+ int al;
+
+ *ok = 0;
+ item = pqueue_peek(s->d1->buffered_messages);
+ if (item == NULL)
+ return 0;
+
+ frag = (hm_fragment *)item->data;
+
+ /* Don't return if reassembly still in progress */
+ if (frag->reassembly != NULL)
+ return 0;
+
+ if (s->d1->handshake_read_seq == frag->msg_header.seq) {
+ unsigned long frag_len = frag->msg_header.frag_len;
+ pqueue_pop(s->d1->buffered_messages);
+
+ al = dtls1_preprocess_fragment(s, &frag->msg_header);
+
+ if (al == 0) { /* no alert */
+ unsigned char *p =
+ (unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
+ memcpy(&p[frag->msg_header.frag_off], frag->fragment,
+ frag->msg_header.frag_len);
+ }
+
+ dtls1_hm_fragment_free(frag);
+ pitem_free(item);
+
+ if (al == 0) {
+ *ok = 1;
+ return frag_len;
+ }
+
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ s->init_num = 0;
+ *ok = 0;
+ return -1;
+ } else
+ return 0;
+}
+
+/*
+ * dtls1_max_handshake_message_len returns the maximum number of bytes
+ * permitted in a DTLS handshake message for |s|. The minimum is 16KB, but
+ * may be greater if the maximum certificate list size requires it.
+ */
+static unsigned long dtls1_max_handshake_message_len(const SSL *s)
+{
+ unsigned long max_len =
+ DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH;
+ if (max_len < (unsigned long)s->max_cert_list)
+ return s->max_cert_list;
+ return max_len;
+}
+
+static int
+dtls1_reassemble_fragment(SSL *s, const struct hm_header_st *msg_hdr, int *ok)
+{
+ hm_fragment *frag = NULL;
+ pitem *item = NULL;
+ int i = -1, is_complete;
+ unsigned char seq64be[8];
+ unsigned long frag_len = msg_hdr->frag_len;
+
+ if ((msg_hdr->frag_off + frag_len) > msg_hdr->msg_len ||
+ msg_hdr->msg_len > dtls1_max_handshake_message_len(s))
+ goto err;
+
+ if (frag_len == 0)
+ return DTLS1_HM_FRAGMENT_RETRY;
+
+ /* Try to find item in queue */
+ memset(seq64be, 0, sizeof(seq64be));
+ seq64be[6] = (unsigned char)(msg_hdr->seq >> 8);
+ seq64be[7] = (unsigned char)msg_hdr->seq;
+ item = pqueue_find(s->d1->buffered_messages, seq64be);
+
+ if (item == NULL) {
+ frag = dtls1_hm_fragment_new(msg_hdr->msg_len, 1);
+ if (frag == NULL)
+ goto err;
+ memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
+ frag->msg_header.frag_len = frag->msg_header.msg_len;
+ frag->msg_header.frag_off = 0;
+ } else {
+ frag = (hm_fragment *)item->data;
+ if (frag->msg_header.msg_len != msg_hdr->msg_len) {
+ item = NULL;
+ frag = NULL;
+ goto err;
+ }
+ }
+
+ /*
+ * If message is already reassembled, this must be a retransmit and can
+ * be dropped. In this case item != NULL and so frag does not need to be
+ * freed.
+ */
+ if (frag->reassembly == NULL) {
+ unsigned char devnull[256];
+
+ while (frag_len) {
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ devnull,
+ frag_len >
+ sizeof(devnull) ? sizeof(devnull) :
+ frag_len, 0);
+ if (i <= 0)
+ goto err;
+ frag_len -= i;
+ }
+ return DTLS1_HM_FRAGMENT_RETRY;
+ }
+
+ /* read the body of the fragment (header has already been read */
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ frag->fragment + msg_hdr->frag_off,
+ frag_len, 0);
+ if ((unsigned long)i != frag_len)
+ i = -1;
+ if (i <= 0)
+ goto err;
+
+ RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off,
+ (long)(msg_hdr->frag_off + frag_len));
+
+ RSMBLY_BITMASK_IS_COMPLETE(frag->reassembly, (long)msg_hdr->msg_len,
+ is_complete);
+
+ if (is_complete) {
+ OPENSSL_free(frag->reassembly);
+ frag->reassembly = NULL;
+ }
+
+ if (item == NULL) {
+ item = pitem_new(seq64be, frag);
+ if (item == NULL) {
+ i = -1;
+ goto err;
+ }
+
+ item = pqueue_insert(s->d1->buffered_messages, item);
+ /*
+ * pqueue_insert fails iff a duplicate item is inserted. However,
+ * |item| cannot be a duplicate. If it were, |pqueue_find|, above,
+ * would have returned it and control would never have reached this
+ * branch.
+ */
+ OPENSSL_assert(item != NULL);
+ }
+
+ return DTLS1_HM_FRAGMENT_RETRY;
+
+ err:
+ if (item == NULL)
+ dtls1_hm_fragment_free(frag);
+ *ok = 0;
+ return i;
+}
+
+static int
+dtls1_process_out_of_seq_message(SSL *s, const struct hm_header_st *msg_hdr,
+ int *ok)
+{
+ int i = -1;
+ hm_fragment *frag = NULL;
+ pitem *item = NULL;
+ unsigned char seq64be[8];
+ unsigned long frag_len = msg_hdr->frag_len;
+
+ if ((msg_hdr->frag_off + frag_len) > msg_hdr->msg_len)
+ goto err;
+
+ /* Try to find item in queue, to prevent duplicate entries */
+ memset(seq64be, 0, sizeof(seq64be));
+ seq64be[6] = (unsigned char)(msg_hdr->seq >> 8);
+ seq64be[7] = (unsigned char)msg_hdr->seq;
+ item = pqueue_find(s->d1->buffered_messages, seq64be);
+
+ /*
+ * If we already have an entry and this one is a fragment, don't discard
+ * it and rather try to reassemble it.
+ */
+ if (item != NULL && frag_len != msg_hdr->msg_len)
+ item = NULL;
+
+ /*
+ * Discard the message if sequence number was already there, is too far
+ * in the future, already in the queue or if we received a FINISHED
+ * before the SERVER_HELLO, which then must be a stale retransmit.
+ */
+ if (msg_hdr->seq <= s->d1->handshake_read_seq ||
+ msg_hdr->seq > s->d1->handshake_read_seq + 10 || item != NULL ||
+ (s->d1->handshake_read_seq == 0 && msg_hdr->type == SSL3_MT_FINISHED))
+ {
+ unsigned char devnull[256];
+
+ while (frag_len) {
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ devnull,
+ frag_len >
+ sizeof(devnull) ? sizeof(devnull) :
+ frag_len, 0);
+ if (i <= 0)
+ goto err;
+ frag_len -= i;
+ }
+ } else {
+ if (frag_len != msg_hdr->msg_len)
+ return dtls1_reassemble_fragment(s, msg_hdr, ok);
+
+ if (frag_len > dtls1_max_handshake_message_len(s))
+ goto err;
+
+ frag = dtls1_hm_fragment_new(frag_len, 0);
+ if (frag == NULL)
+ goto err;
+
+ memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
+
+ if (frag_len) {
+ /*
+ * read the body of the fragment (header has already been read
+ */
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ frag->fragment, frag_len, 0);
+ if ((unsigned long)i != frag_len)
+ i = -1;
+ if (i <= 0)
+ goto err;
+ }
+
+ item = pitem_new(seq64be, frag);
+ if (item == NULL)
+ goto err;
+
+ item = pqueue_insert(s->d1->buffered_messages, item);
+ /*
+ * pqueue_insert fails iff a duplicate item is inserted. However,
+ * |item| cannot be a duplicate. If it were, |pqueue_find|, above,
+ * would have returned it. Then, either |frag_len| !=
+ * |msg_hdr->msg_len| in which case |item| is set to NULL and it will
+ * have been processed with |dtls1_reassemble_fragment|, above, or
+ * the record will have been discarded.
+ */
+ OPENSSL_assert(item != NULL);
+ }
+
+ return DTLS1_HM_FRAGMENT_RETRY;
+
+ err:
+ if (item == NULL)
+ dtls1_hm_fragment_free(frag);
+ *ok = 0;
+ return i;
+}
+
+static int dtls_get_reassembled_message(SSL *s, long *len)
+{
+ unsigned char wire[DTLS1_HM_HEADER_LENGTH];
+ unsigned long mlen, frag_off, frag_len;
+ int i, al, recvd_type;
+ struct hm_header_st msg_hdr;
+ int ok;
+
+ redo:
+ /* see if we have the required fragment already */
+ if ((frag_len = dtls1_retrieve_buffered_fragment(s, &ok)) || ok) {
+ if (ok)
+ s->init_num = frag_len;
+ *len = frag_len;
+ return ok;
+ }
+
+ /* read handshake message header */
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type, wire,
+ DTLS1_HM_HEADER_LENGTH, 0);
+ if (i <= 0) { /* nbio, or an error */
+ s->rwstate = SSL_READING;
+ *len = i;
+ return 0;
+ }
+ if(recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) {
+ if (wire[0] != SSL3_MT_CCS) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE,
+ SSL_R_BAD_CHANGE_CIPHER_SPEC);
+ goto f_err;
+ }
+
+ memcpy(s->init_buf->data, wire, i);
+ s->init_num = i - 1;
+ s->init_msg = s->init_buf->data + 1;
+ s->s3->tmp.message_type = SSL3_MT_CHANGE_CIPHER_SPEC;
+ s->s3->tmp.message_size = i - 1;
+ *len = i - 1;
+ return 1;
+ }
+
+ /* Handshake fails if message header is incomplete */
+ if (i != DTLS1_HM_HEADER_LENGTH) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+
+ /* parse the message fragment header */
+ dtls1_get_message_header(wire, &msg_hdr);
+
+ mlen = msg_hdr.msg_len;
+ frag_off = msg_hdr.frag_off;
+ frag_len = msg_hdr.frag_len;
+
+ /*
+ * We must have at least frag_len bytes left in the record to be read.
+ * Fragments must not span records.
+ */
+ if (frag_len > RECORD_LAYER_get_rrec_length(&s->rlayer)) {
+ al = SSL3_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH);
+ goto f_err;
+ }
+
+ /*
+ * if this is a future (or stale) message it gets buffered
+ * (or dropped)--no further processing at this time
+ * While listening, we accept seq 1 (ClientHello with cookie)
+ * although we're still expecting seq 0 (ClientHello)
+ */
+ if (msg_hdr.seq != s->d1->handshake_read_seq) {
+ *len = dtls1_process_out_of_seq_message(s, &msg_hdr, &ok);
+ return ok;
+ }
+
+ if (frag_len && frag_len < mlen) {
+ *len = dtls1_reassemble_fragment(s, &msg_hdr, &ok);
+ return ok;
+ }
+
+ if (!s->server && s->d1->r_msg_hdr.frag_off == 0 &&
+ wire[0] == SSL3_MT_HELLO_REQUEST) {
+ /*
+ * The server may always send 'Hello Request' messages -- we are
+ * doing a handshake anyway now, so ignore them if their format is
+ * correct. Does not count for 'Finished' MAC.
+ */
+ if (wire[1] == 0 && wire[2] == 0 && wire[3] == 0) {
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
+ wire, DTLS1_HM_HEADER_LENGTH, s,
+ s->msg_callback_arg);
+
+ s->init_num = 0;
+ goto redo;
+ } else { /* Incorrectly formated Hello request */
+
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE,
+ SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+ }
+
+ if ((al = dtls1_preprocess_fragment(s, &msg_hdr)))
+ goto f_err;
+
+ if (frag_len > 0) {
+ unsigned char *p =
+ (unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
+
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ &p[frag_off], frag_len, 0);
+
+ /*
+ * This shouldn't ever fail due to NBIO because we already checked
+ * that we have enough data in the record
+ */
+ if (i <= 0) {
+ s->rwstate = SSL_READING;
+ *len = i;
+ return 0;
+ }
+ } else
+ i = 0;
+
+ /*
+ * XDTLS: an incorrectly formatted fragment should cause the handshake
+ * to fail
+ */
+ if (i != (int)frag_len) {
+ al = SSL3_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL3_AD_ILLEGAL_PARAMETER);
+ goto f_err;
+ }
+
+ /*
+ * Note that s->init_num is *not* used as current offset in
+ * s->init_buf->data, but as a counter summing up fragments' lengths: as
+ * soon as they sum up to handshake packet length, we assume we have got
+ * all the fragments.
+ */
+ *len = s->init_num = frag_len;
+ return 1;
+
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ s->init_num = 0;
+ *len = -1;
+ return 0;
+}
+
+/*-
+ * for these 2 messages, we need to
+ * ssl->enc_read_ctx re-init
+ * ssl->rlayer.read_sequence zero
+ * ssl->s3->read_mac_secret re-init
+ * ssl->session->read_sym_enc assign
+ * ssl->session->read_compression assign
+ * ssl->session->read_hash assign
+ */
+int dtls_construct_change_cipher_spec(SSL *s)
+{
+ unsigned char *p;
+
+ p = (unsigned char *)s->init_buf->data;
+ *p++ = SSL3_MT_CCS;
+ s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
+ s->init_num = DTLS1_CCS_HEADER_LENGTH;
+
+ if (s->version == DTLS1_BAD_VER) {
+ s->d1->next_handshake_write_seq++;
+ s2n(s->d1->handshake_write_seq, p);
+ s->init_num += 2;
+ }
+
+ s->init_off = 0;
+
+ dtls1_set_message_header_int(s, SSL3_MT_CCS, 0,
+ s->d1->handshake_write_seq, 0, 0);
+
+ /* buffer the message to handle re-xmits */
+ if (!dtls1_buffer_message(s, 1)) {
+ SSLerr(SSL_F_DTLS_CONSTRUCT_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_SCTP
+enum WORK_STATE dtls_wait_for_dry(SSL *s)
+{
+ int ret;
+
+ /* read app data until dry event */
+ ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
+ if (ret < 0)
+ return WORK_ERROR;
+
+ if (ret == 0) {
+ s->s3->in_read_app_data = 2;
+ s->rwstate = SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ return WORK_MORE_A;
+ }
+ return WORK_FINISHED_CONTINUE;
+}
+#endif
+
+int dtls1_read_failed(SSL *s, int code)
+{
+ if (code > 0) {
+ fprintf(stderr, "invalid state reached %s:%d", __FILE__, __LINE__);
+ return 1;
+ }
+
+ if (!dtls1_is_timer_expired(s)) {
+ /*
+ * not a timeout, none of our business, let higher layers handle
+ * this. in fact it's probably an error
+ */
+ return code;
+ }
+#ifndef OPENSSL_NO_HEARTBEATS
+ /* done, no need to send a retransmit */
+ if (!SSL_in_init(s) && !s->tlsext_hb_pending)
+#else
+ /* done, no need to send a retransmit */
+ if (!SSL_in_init(s))
+#endif
+ {
+ BIO_set_flags(SSL_get_rbio(s), BIO_FLAGS_READ);
+ return code;
+ }
+
+ return dtls1_handle_timeout(s);
+}
+
+int dtls1_get_queue_priority(unsigned short seq, int is_ccs)
+{
+ /*
+ * The index of the retransmission queue actually is the message sequence
+ * number, since the queue only contains messages of a single handshake.
+ * However, the ChangeCipherSpec has no message sequence number and so
+ * using only the sequence will result in the CCS and Finished having the
+ * same index. To prevent this, the sequence number is multiplied by 2.
+ * In case of a CCS 1 is subtracted. This does not only differ CSS and
+ * Finished, it also maintains the order of the index (important for
+ * priority queues) and fits in the unsigned short variable.
+ */
+ return seq * 2 - is_ccs;
+}
+
+int dtls1_retransmit_buffered_messages(SSL *s)
+{
+ pqueue sent = s->d1->sent_messages;
+ piterator iter;
+ pitem *item;
+ hm_fragment *frag;
+ int found = 0;
+
+ iter = pqueue_iterator(sent);
+
+ for (item = pqueue_next(&iter); item != NULL; item = pqueue_next(&iter)) {
+ frag = (hm_fragment *)item->data;
+ if (dtls1_retransmit_message(s, (unsigned short)
+ dtls1_get_queue_priority
+ (frag->msg_header.seq,
+ frag->msg_header.is_ccs), 0,
+ &found) <= 0 && found) {
+ fprintf(stderr, "dtls1_retransmit_message() failed\n");
+ return -1;
+ }
+ }
+
+ return 1;
+}
+
+int dtls1_buffer_message(SSL *s, int is_ccs)
+{
+ pitem *item;
+ hm_fragment *frag;
+ unsigned char seq64be[8];
+
+ /*
+ * this function is called immediately after a message has been
+ * serialized
+ */
+ OPENSSL_assert(s->init_off == 0);
+
+ frag = dtls1_hm_fragment_new(s->init_num, 0);
+ if (!frag)
+ return 0;
+
+ memcpy(frag->fragment, s->init_buf->data, s->init_num);
+
+ if (is_ccs) {
+ /* For DTLS1_BAD_VER the header length is non-standard */
+ OPENSSL_assert(s->d1->w_msg_hdr.msg_len +
+ ((s->version==DTLS1_BAD_VER)?3:DTLS1_CCS_HEADER_LENGTH)
+ == (unsigned int)s->init_num);
+ } else {
+ OPENSSL_assert(s->d1->w_msg_hdr.msg_len +
+ DTLS1_HM_HEADER_LENGTH == (unsigned int)s->init_num);
+ }
+
+ frag->msg_header.msg_len = s->d1->w_msg_hdr.msg_len;
+ frag->msg_header.seq = s->d1->w_msg_hdr.seq;
+ frag->msg_header.type = s->d1->w_msg_hdr.type;
+ frag->msg_header.frag_off = 0;
+ frag->msg_header.frag_len = s->d1->w_msg_hdr.msg_len;
+ frag->msg_header.is_ccs = is_ccs;
+
+ /* save current state */
+ frag->msg_header.saved_retransmit_state.enc_write_ctx = s->enc_write_ctx;
+ frag->msg_header.saved_retransmit_state.write_hash = s->write_hash;
+ frag->msg_header.saved_retransmit_state.compress = s->compress;
+ frag->msg_header.saved_retransmit_state.session = s->session;
+ frag->msg_header.saved_retransmit_state.epoch =
+ DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer);
+
+ memset(seq64be, 0, sizeof(seq64be));
+ seq64be[6] =
+ (unsigned
+ char)(dtls1_get_queue_priority(frag->msg_header.seq,
+ frag->msg_header.is_ccs) >> 8);
+ seq64be[7] =
+ (unsigned
+ char)(dtls1_get_queue_priority(frag->msg_header.seq,
+ frag->msg_header.is_ccs));
+
+ item = pitem_new(seq64be, frag);
+ if (item == NULL) {
+ dtls1_hm_fragment_free(frag);
+ return 0;
+ }
+
+ pqueue_insert(s->d1->sent_messages, item);
+ return 1;
+}
+
+int
+dtls1_retransmit_message(SSL *s, unsigned short seq, unsigned long frag_off,
+ int *found)
+{
+ int ret;
+ /* XDTLS: for now assuming that read/writes are blocking */
+ pitem *item;
+ hm_fragment *frag;
+ unsigned long header_length;
+ unsigned char seq64be[8];
+ struct dtls1_retransmit_state saved_state;
+
+ /*-
+ OPENSSL_assert(s->init_num == 0);
+ OPENSSL_assert(s->init_off == 0);
+ */
+
+ /* XDTLS: the requested message ought to be found, otherwise error */
+ memset(seq64be, 0, sizeof(seq64be));
+ seq64be[6] = (unsigned char)(seq >> 8);
+ seq64be[7] = (unsigned char)seq;
+
+ item = pqueue_find(s->d1->sent_messages, seq64be);
+ if (item == NULL) {
+ fprintf(stderr, "retransmit: message %d non-existant\n", seq);
+ *found = 0;
+ return 0;
+ }
+
+ *found = 1;
+ frag = (hm_fragment *)item->data;
+
+ if (frag->msg_header.is_ccs)
+ header_length = DTLS1_CCS_HEADER_LENGTH;
+ else
+ header_length = DTLS1_HM_HEADER_LENGTH;
+
+ memcpy(s->init_buf->data, frag->fragment,
+ frag->msg_header.msg_len + header_length);
+ s->init_num = frag->msg_header.msg_len + header_length;
+
+ dtls1_set_message_header_int(s, frag->msg_header.type,
+ frag->msg_header.msg_len,
+ frag->msg_header.seq, 0,
+ frag->msg_header.frag_len);
+
+ /* save current state */
+ saved_state.enc_write_ctx = s->enc_write_ctx;
+ saved_state.write_hash = s->write_hash;
+ saved_state.compress = s->compress;
+ saved_state.session = s->session;
+ saved_state.epoch = DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer);
+
+ s->d1->retransmitting = 1;
+
+ /* restore state in which the message was originally sent */
+ s->enc_write_ctx = frag->msg_header.saved_retransmit_state.enc_write_ctx;
+ s->write_hash = frag->msg_header.saved_retransmit_state.write_hash;
+ s->compress = frag->msg_header.saved_retransmit_state.compress;
+ s->session = frag->msg_header.saved_retransmit_state.session;
+ DTLS_RECORD_LAYER_set_saved_w_epoch(&s->rlayer,
+ frag->msg_header.saved_retransmit_state.epoch);
+
+ ret = dtls1_do_write(s, frag->msg_header.is_ccs ?
+ SSL3_RT_CHANGE_CIPHER_SPEC : SSL3_RT_HANDSHAKE);
+
+ /* restore current state */
+ s->enc_write_ctx = saved_state.enc_write_ctx;
+ s->write_hash = saved_state.write_hash;
+ s->compress = saved_state.compress;
+ s->session = saved_state.session;
+ DTLS_RECORD_LAYER_set_saved_w_epoch(&s->rlayer, saved_state.epoch);
+
+ s->d1->retransmitting = 0;
+
+ (void)BIO_flush(SSL_get_wbio(s));
+ return ret;
+}
+
+/* call this function when the buffered messages are no longer needed */
+void dtls1_clear_record_buffer(SSL *s)
+{
+ pitem *item;
+
+ for (item = pqueue_pop(s->d1->sent_messages);
+ item != NULL; item = pqueue_pop(s->d1->sent_messages)) {
+ dtls1_hm_fragment_free((hm_fragment *)item->data);
+ pitem_free(item);
+ }
+}
+
+void dtls1_set_message_header(SSL *s, unsigned char *p,
+ unsigned char mt, unsigned long len,
+ unsigned long frag_off,
+ unsigned long frag_len)
+{
+ if (frag_off == 0) {
+ s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
+ s->d1->next_handshake_write_seq++;
+ }
+
+ dtls1_set_message_header_int(s, mt, len, s->d1->handshake_write_seq,
+ frag_off, frag_len);
+}
+
+/* don't actually do the writing, wait till the MTU has been retrieved */
+static void
+dtls1_set_message_header_int(SSL *s, unsigned char mt,
+ unsigned long len, unsigned short seq_num,
+ unsigned long frag_off, unsigned long frag_len)
+{
+ struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
+
+ msg_hdr->type = mt;
+ msg_hdr->msg_len = len;
+ msg_hdr->seq = seq_num;
+ msg_hdr->frag_off = frag_off;
+ msg_hdr->frag_len = frag_len;
+}
+
+static void
+dtls1_fix_message_header(SSL *s, unsigned long frag_off,
+ unsigned long frag_len)
+{
+ struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
+
+ msg_hdr->frag_off = frag_off;
+ msg_hdr->frag_len = frag_len;
+}
+
+static unsigned char *dtls1_write_message_header(SSL *s, unsigned char *p)
+{
+ struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
+
+ *p++ = msg_hdr->type;
+ l2n3(msg_hdr->msg_len, p);
+
+ s2n(msg_hdr->seq, p);
+ l2n3(msg_hdr->frag_off, p);
+ l2n3(msg_hdr->frag_len, p);
+
+ return p;
+}
+
+void
+dtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr)
+{
+ memset(msg_hdr, 0, sizeof(*msg_hdr));
+ msg_hdr->type = *(data++);
+ n2l3(data, msg_hdr->msg_len);
+
+ n2s(data, msg_hdr->seq);
+ n2l3(data, msg_hdr->frag_off);
+ n2l3(data, msg_hdr->frag_len);
+}
+
+
--- /dev/null
+/* ssl/statem/statem_lib.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * ECC cipher suite support in OpenSSL originally developed by
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
+ */
+
+#include <limits.h>
+#include <string.h>
+#include <stdio.h>
+#include "../ssl_locl.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#include <openssl/x509.h>
+
+/*
+ * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
+ * SSL3_RT_CHANGE_CIPHER_SPEC)
+ */
+int ssl3_do_write(SSL *s, int type)
+{
+ int ret;
+
+ ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
+ s->init_num);
+ if (ret < 0)
+ return (-1);
+ if (type == SSL3_RT_HANDSHAKE)
+ /*
+ * should not be done for 'Hello Request's, but in that case we'll
+ * ignore the result anyway
+ */
+ ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off],
+ ret);
+
+ if (ret == s->init_num) {
+ if (s->msg_callback)
+ s->msg_callback(1, s->version, type, s->init_buf->data,
+ (size_t)(s->init_off + s->init_num), s,
+ s->msg_callback_arg);
+ return (1);
+ }
+ s->init_off += ret;
+ s->init_num -= ret;
+ return (0);
+}
+
+int tls_construct_finished(SSL *s, const char *sender, int slen)
+{
+ unsigned char *p;
+ int i;
+ unsigned long l;
+
+ p = ssl_handshake_start(s);
+
+ i = s->method->ssl3_enc->final_finish_mac(s,
+ sender, slen,
+ s->s3->tmp.finish_md);
+ if (i <= 0)
+ return 0;
+ s->s3->tmp.finish_md_len = i;
+ memcpy(p, s->s3->tmp.finish_md, i);
+ l = i;
+
+ /*
+ * Copy the finished so we can use it for renegotiation checks
+ */
+ if (!s->server) {
+ OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+ memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
+ s->s3->previous_client_finished_len = i;
+ } else {
+ OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+ memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
+ s->s3->previous_server_finished_len = i;
+ }
+
+ if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+/*
+ * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
+ * to far.
+ */
+static void ssl3_take_mac(SSL *s)
+{
+ const char *sender;
+ int slen;
+ /*
+ * If no new cipher setup return immediately: other functions will set
+ * the appropriate error.
+ */
+ if (s->s3->tmp.new_cipher == NULL)
+ return;
+ if (!s->server) {
+ sender = s->method->ssl3_enc->server_finished_label;
+ slen = s->method->ssl3_enc->server_finished_label_len;
+ } else {
+ sender = s->method->ssl3_enc->client_finished_label;
+ slen = s->method->ssl3_enc->client_finished_label_len;
+ }
+
+ s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
+ sender,
+ slen,
+ s->s3->tmp.peer_finish_md);
+}
+#endif
+
+enum MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
+{
+ int al;
+ long remain;
+
+ remain = PACKET_remaining(pkt);
+ /*
+ * 'Change Cipher Spec' is just a single byte, which should already have
+ * been consumed by ssl_get_message() so there should be no bytes left,
+ * unless we're using DTLS1_BAD_VER, which has an extra 2 bytes
+ */
+ if (SSL_IS_DTLS(s)) {
+ if ((s->version == DTLS1_BAD_VER
+ && remain != DTLS1_CCS_HEADER_LENGTH + 1)
+ || (s->version != DTLS1_BAD_VER
+ && remain != DTLS1_CCS_HEADER_LENGTH - 1)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
+ SSL_R_BAD_CHANGE_CIPHER_SPEC);
+ goto f_err;
+ }
+ } else {
+ if (remain != 0) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
+ SSL_R_BAD_CHANGE_CIPHER_SPEC);
+ goto f_err;
+ }
+ }
+
+ /* Check we have a cipher to change to */
+ if (s->s3->tmp.new_cipher == NULL) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY);
+ goto f_err;
+ }
+
+ s->s3->change_cipher_spec = 1;
+ if (!ssl3_do_change_cipher_spec(s)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+ if (SSL_IS_DTLS(s)) {
+ dtls1_reset_seq_numbers(s, SSL3_CC_READ);
+
+ if (s->version == DTLS1_BAD_VER)
+ s->d1->handshake_read_seq++;
+
+#ifndef OPENSSL_NO_SCTP
+ /*
+ * Remember that a CCS has been received, so that an old key of
+ * SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no
+ * SCTP is used
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL);
+#endif
+ }
+
+ return MSG_PROCESS_CONTINUE_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt)
+{
+ int al, i;
+
+ /* If this occurs, we have missed a message */
+ if (!s->s3->change_cipher_spec) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
+ goto f_err;
+ }
+ s->s3->change_cipher_spec = 0;
+
+ i = s->s3->tmp.peer_finish_md_len;
+
+ if (i < 0 || (unsigned long)i != PACKET_remaining(pkt)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
+ goto f_err;
+ }
+
+ if (CRYPTO_memcmp(PACKET_data(pkt), s->s3->tmp.peer_finish_md, i) != 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
+ goto f_err;
+ }
+
+ /*
+ * Copy the finished so we can use it for renegotiation checks
+ */
+ if (s->server) {
+ OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+ memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
+ s->s3->previous_client_finished_len = i;
+ } else {
+ OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+ memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
+ s->s3->previous_server_finished_len = i;
+ }
+
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+int tls_construct_change_cipher_spec(SSL *s)
+{
+ unsigned char *p;
+
+ p = (unsigned char *)s->init_buf->data;
+ *p = SSL3_MT_CCS;
+ s->init_num = 1;
+ s->init_off = 0;
+
+ return 1;
+}
+
+unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
+{
+ unsigned char *p;
+ unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
+
+ if (!ssl_add_cert_chain(s, cpk, &l))
+ return 0;
+
+ l -= 3 + SSL_HM_HEADER_LENGTH(s);
+ p = ssl_handshake_start(s);
+ l2n3(l, p);
+ l += 3;
+
+ if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) {
+ SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ return l + SSL_HM_HEADER_LENGTH(s);
+}
+
+enum WORK_STATE tls_finish_handshake(SSL *s, enum WORK_STATE wst)
+{
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+
+#ifndef OPENSSL_NO_SCTP
+ if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) {
+ enum WORK_STATE ret;
+ ret = dtls_wait_for_dry(s);
+ if (ret != WORK_FINISHED_CONTINUE)
+ return ret;
+ }
+#endif
+
+ /* clean a few things up */
+ ssl3_cleanup_key_block(s);
+
+ if (!SSL_IS_DTLS(s)) {
+ /*
+ * We don't do this in DTLS because we may still need the init_buf
+ * in case there are any unexpected retransmits
+ */
+ BUF_MEM_free(s->init_buf);
+ s->init_buf = NULL;
+ }
+
+ ssl_free_wbio_buffer(s);
+
+ s->init_num = 0;
+
+ if (!s->server || s->renegotiate == 2) {
+ /* skipped if we just sent a HelloRequest */
+ s->renegotiate = 0;
+ s->new_session = 0;
+
+ if (s->server) {
+ s->renegotiate = 0;
+ s->new_session = 0;
+
+ ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
+
+ s->ctx->stats.sess_accept_good++;
+ s->handshake_func = statem_accept;
+ } else {
+ ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
+ if (s->hit)
+ s->ctx->stats.sess_hit++;
+
+ s->handshake_func = statem_connect;
+ s->ctx->stats.sess_connect_good++;
+ }
+
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_DONE, 1);
+
+ if (SSL_IS_DTLS(s)) {
+ /* done with handshaking */
+ s->d1->handshake_read_seq = 0;
+ s->d1->handshake_write_seq = 0;
+ s->d1->next_handshake_write_seq = 0;
+ }
+ }
+
+ return WORK_FINISHED_STOP;
+}
+
+int tls_get_message_header(SSL *s, int *mt)
+{
+ /* s->init_num < SSL3_HM_HEADER_LENGTH */
+ int skip_message, i, recvd_type, al;
+ unsigned char *p;
+ unsigned long l;
+
+ p = (unsigned char *)s->init_buf->data;
+
+ do {
+ while (s->init_num < SSL3_HM_HEADER_LENGTH) {
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type,
+ &p[s->init_num], SSL3_HM_HEADER_LENGTH - s->init_num, 0);
+ if (i <= 0) {
+ s->rwstate = SSL_READING;
+ return 0;
+ }
+ if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) {
+ s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
+ s->init_num = i - 1;
+ s->s3->tmp.message_size = i;
+ return 1;
+ } else if (recvd_type != SSL3_RT_HANDSHAKE) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY);
+ goto f_err;
+ }
+ s->init_num += i;
+ }
+
+ skip_message = 0;
+ if (!s->server)
+ if (p[0] == SSL3_MT_HELLO_REQUEST)
+ /*
+ * The server may always send 'Hello Request' messages --
+ * we are doing a handshake anyway now, so ignore them if
+ * their format is correct. Does not count for 'Finished'
+ * MAC.
+ */
+ if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
+ s->init_num = 0;
+ skip_message = 1;
+
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
+ p, SSL3_HM_HEADER_LENGTH, s,
+ s->msg_callback_arg);
+ }
+ } while (skip_message);
+ /* s->init_num == SSL3_HM_HEADER_LENGTH */
+
+ *mt = *p;
+ s->s3->tmp.message_type = *(p++);
+
+ if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
+ /*
+ * Only happens with SSLv3+ in an SSLv2 backward compatible
+ * ClientHello
+ */
+ /*
+ * Total message size is the remaining record bytes to read
+ * plus the SSL3_HM_HEADER_LENGTH bytes that we already read
+ */
+ l = RECORD_LAYER_get_rrec_length(&s->rlayer)
+ + SSL3_HM_HEADER_LENGTH;
+ if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l)) {
+ SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB);
+ goto err;
+ }
+ s->s3->tmp.message_size = l;
+
+ s->init_msg = s->init_buf->data;
+ s->init_num = SSL3_HM_HEADER_LENGTH;
+ } else {
+ n2l3(p, l);
+ /* BUF_MEM_grow takes an 'int' parameter */
+ if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE);
+ goto f_err;
+ }
+ if (l && !BUF_MEM_grow_clean(s->init_buf,
+ (int)l + SSL3_HM_HEADER_LENGTH)) {
+ SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB);
+ goto err;
+ }
+ s->s3->tmp.message_size = l;
+
+ s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
+ s->init_num = 0;
+ }
+
+ return 1;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ return 0;
+}
+
+int tls_get_message_body(SSL *s, unsigned long *len)
+{
+ long n;
+ unsigned char *p;
+ int i;
+
+ if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ /* We've already read everything in */
+ *len = (unsigned long)s->init_num;
+ return 1;
+ }
+
+ p = s->init_msg;
+ n = s->s3->tmp.message_size - s->init_num;
+ while (n > 0) {
+ i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
+ &p[s->init_num], n, 0);
+ if (i <= 0) {
+ s->rwstate = SSL_READING;
+ *len = 0;
+ return 0;
+ }
+ s->init_num += i;
+ n -= i;
+ }
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+ /*
+ * If receiving Finished, record MAC of prior handshake messages for
+ * Finished verification.
+ */
+ if (*s->init_buf->data == SSL3_MT_FINISHED)
+ ssl3_take_mac(s);
+#endif
+
+ /* Feed this message into MAC computation. */
+ if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
+ ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num);
+ if (s->msg_callback)
+ s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data,
+ (size_t)s->init_num, s, s->msg_callback_arg);
+ } else {
+ ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
+ s->init_num + SSL3_HM_HEADER_LENGTH);
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
+ (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
+ s->msg_callback_arg);
+ }
+
+ /*
+ * init_num should never be negative...should probably be declared
+ * unsigned
+ */
+ if (s->init_num < 0) {
+ SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ *len = 0;
+ return 0;
+ }
+ *len = (unsigned long)s->init_num;
+ return 1;
+}
+
+int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
+{
+ EVP_PKEY *pk;
+ int ret = -1, i;
+
+ if (pkey == NULL)
+ pk = X509_get_pubkey(x);
+ else
+ pk = pkey;
+ if (pk == NULL)
+ goto err;
+
+ i = pk->type;
+ if (i == EVP_PKEY_RSA) {
+ ret = SSL_PKEY_RSA_ENC;
+ } else if (i == EVP_PKEY_DSA) {
+ ret = SSL_PKEY_DSA_SIGN;
+ }
+#ifndef OPENSSL_NO_EC
+ else if (i == EVP_PKEY_EC) {
+ ret = SSL_PKEY_ECC;
+ }
+#endif
+ else if (i == NID_id_GostR3410_2001) {
+ ret = SSL_PKEY_GOST01;
+ } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) {
+ /*
+ * For DH two cases: DH certificate signed with RSA and DH
+ * certificate signed with DSA.
+ */
+ i = X509_certificate_type(x, pk);
+ if (i & EVP_PKS_RSA)
+ ret = SSL_PKEY_DH_RSA;
+ else if (i & EVP_PKS_DSA)
+ ret = SSL_PKEY_DH_DSA;
+ }
+
+ err:
+ if (!pkey)
+ EVP_PKEY_free(pk);
+ return (ret);
+}
+
+int ssl_verify_alarm_type(long type)
+{
+ int al;
+
+ switch (type) {
+ case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
+ case X509_V_ERR_UNABLE_TO_GET_CRL:
+ case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
+ al = SSL_AD_UNKNOWN_CA;
+ break;
+ case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
+ case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
+ case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
+ case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
+ case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
+ case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
+ case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
+ case X509_V_ERR_CERT_NOT_YET_VALID:
+ case X509_V_ERR_CRL_NOT_YET_VALID:
+ case X509_V_ERR_CERT_UNTRUSTED:
+ case X509_V_ERR_CERT_REJECTED:
+ al = SSL_AD_BAD_CERTIFICATE;
+ break;
+ case X509_V_ERR_CERT_SIGNATURE_FAILURE:
+ case X509_V_ERR_CRL_SIGNATURE_FAILURE:
+ al = SSL_AD_DECRYPT_ERROR;
+ break;
+ case X509_V_ERR_CERT_HAS_EXPIRED:
+ case X509_V_ERR_CRL_HAS_EXPIRED:
+ al = SSL_AD_CERTIFICATE_EXPIRED;
+ break;
+ case X509_V_ERR_CERT_REVOKED:
+ al = SSL_AD_CERTIFICATE_REVOKED;
+ break;
+ case X509_V_ERR_OUT_OF_MEM:
+ al = SSL_AD_INTERNAL_ERROR;
+ break;
+ case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
+ case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
+ case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
+ case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
+ case X509_V_ERR_CERT_CHAIN_TOO_LONG:
+ case X509_V_ERR_PATH_LENGTH_EXCEEDED:
+ case X509_V_ERR_INVALID_CA:
+ al = SSL_AD_UNKNOWN_CA;
+ break;
+ case X509_V_ERR_APPLICATION_VERIFICATION:
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ break;
+ case X509_V_ERR_INVALID_PURPOSE:
+ al = SSL_AD_UNSUPPORTED_CERTIFICATE;
+ break;
+ default:
+ al = SSL_AD_CERTIFICATE_UNKNOWN;
+ break;
+ }
+ return (al);
+}
+
+int ssl_allow_compression(SSL *s)
+{
+ if (s->options & SSL_OP_NO_COMPRESSION)
+ return 0;
+ return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL);
+}
--- /dev/null
+/* ssl/statem/statem_srvr.c -*- mode:C; c-file-style: "eay" -*- */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * Portions of the attached software ("Contribution") are developed by
+ * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
+ *
+ * The Contribution is licensed pursuant to the OpenSSL open source
+ * license provided above.
+ *
+ * ECC cipher suite support in OpenSSL originally written by
+ * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
+
+
+#include <stdio.h>
+#include "../ssl_locl.h"
+#include "internal/constant_time_locl.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+#include <openssl/x509.h>
+#ifndef OPENSSL_NO_DH
+# include <openssl/dh.h>
+#endif
+#include <openssl/bn.h>
+#include <openssl/md5.h>
+
+static STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,
+ PACKET *cipher_suites,
+ STACK_OF(SSL_CIPHER) **skp,
+ int sslv2format, int *al);
+
+#ifndef OPENSSL_NO_SRP
+static int ssl_check_srp_ext_ClientHello(SSL *s, int *al)
+{
+ int ret = SSL_ERROR_NONE;
+
+ *al = SSL_AD_UNRECOGNIZED_NAME;
+
+ if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) &&
+ (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) {
+ if (s->srp_ctx.login == NULL) {
+ /*
+ * RFC 5054 says SHOULD reject, we do so if There is no srp
+ * login name
+ */
+ ret = SSL3_AL_FATAL;
+ *al = SSL_AD_UNKNOWN_PSK_IDENTITY;
+ } else {
+ ret = SSL_srp_server_param_with_username(s, al);
+ }
+ }
+ return ret;
+}
+#endif
+
+int tls_construct_hello_request(SSL *s)
+{
+ if (!ssl_set_handshake_header(s, SSL3_MT_HELLO_REQUEST, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_HELLO_REQUEST, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ return 1;
+}
+
+unsigned int dtls_raw_hello_verify_request(unsigned char *buf,
+ unsigned char *cookie,
+ unsigned char cookie_len)
+{
+ unsigned int msg_len;
+ unsigned char *p;
+
+ p = buf;
+ /* Always use DTLS 1.0 version: see RFC 6347 */
+ *(p++) = DTLS1_VERSION >> 8;
+ *(p++) = DTLS1_VERSION & 0xFF;
+
+ *(p++) = (unsigned char)cookie_len;
+ memcpy(p, cookie, cookie_len);
+ p += cookie_len;
+ msg_len = p - buf;
+
+ return msg_len;
+}
+
+int dtls_construct_hello_verify_request(SSL *s)
+{
+ unsigned int len;
+ unsigned char *buf;
+
+ buf = (unsigned char *)s->init_buf->data;
+
+ if (s->ctx->app_gen_cookie_cb == NULL ||
+ s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
+ &(s->d1->cookie_len)) == 0 ||
+ s->d1->cookie_len > 255) {
+ SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,
+ SSL_R_COOKIE_GEN_CALLBACK_FAILURE);
+ statem_set_error(s);
+ return 0;
+ }
+
+ len = dtls_raw_hello_verify_request(&buf[DTLS1_HM_HEADER_LENGTH],
+ s->d1->cookie, s->d1->cookie_len);
+
+ dtls1_set_message_header(s, buf, DTLS1_MT_HELLO_VERIFY_REQUEST, len, 0,
+ len);
+ len += DTLS1_HM_HEADER_LENGTH;
+
+ /* number of bytes to write */
+ s->init_num = len;
+ s->init_off = 0;
+
+ return 1;
+}
+
+enum MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt)
+{
+ int i, al = SSL_AD_INTERNAL_ERROR;
+ unsigned int j, complen = 0;
+ unsigned long id;
+ SSL_CIPHER *c;
+#ifndef OPENSSL_NO_COMP
+ SSL_COMP *comp = NULL;
+#endif
+ STACK_OF(SSL_CIPHER) *ciphers = NULL;
+ int protverr = 1;
+ /* |cookie| will only be initialized for DTLS. */
+ PACKET session_id, cipher_suites, compression, extensions, cookie;
+ int is_v2_record;
+
+ is_v2_record = RECORD_LAYER_is_sslv2_record(&s->rlayer);
+
+ PACKET_null_init(&cookie);
+ /* First lets get s->client_version set correctly */
+ if (is_v2_record) {
+ unsigned int version;
+ unsigned int mt;
+ /*-
+ * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2
+ * header is sent directly on the wire, not wrapped as a TLS
+ * record. Our record layer just processes the message length and passes
+ * the rest right through. Its format is:
+ * Byte Content
+ * 0-1 msg_length - decoded by the record layer
+ * 2 msg_type - s->init_msg points here
+ * 3-4 version
+ * 5-6 cipher_spec_length
+ * 7-8 session_id_length
+ * 9-10 challenge_length
+ * ... ...
+ */
+
+ if (!PACKET_get_1(pkt, &mt)
+ || mt != SSL2_MT_CLIENT_HELLO) {
+ /*
+ * Should never happen. We should have tested this in the record
+ * layer in order to have determined that this is a SSLv2 record
+ * in the first place
+ */
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (!PACKET_get_net_2(pkt, &version)) {
+ /* No protocol version supplied! */
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
+ goto err;
+ }
+ if (version == 0x0002) {
+ /* This is real SSLv2. We don't support it. */
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
+ goto err;
+ } else if ((version & 0xff00) == (SSL3_VERSION_MAJOR << 8)) {
+ /* SSLv3/TLS */
+ s->client_version = version;
+ } else {
+ /* No idea what protocol this is */
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
+ goto err;
+ }
+ } else {
+ /*
+ * use version from inside client hello, not from record header (may
+ * differ: see RFC 2246, Appendix E, second paragraph)
+ */
+ if(!PACKET_get_net_2(pkt, (unsigned int *)&s->client_version)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ }
+
+ /* Do SSL/TLS version negotiation if applicable */
+ if (!SSL_IS_DTLS(s)) {
+ if (s->version != TLS_ANY_VERSION) {
+ if (s->client_version >= s->version) {
+ protverr = 0;
+ }
+ } else if (s->client_version >= SSL3_VERSION) {
+ switch(s->client_version) {
+ default:
+ case TLS1_2_VERSION:
+ if(!(s->options & SSL_OP_NO_TLSv1_2)) {
+ s->version = TLS1_2_VERSION;
+ s->method = TLSv1_2_server_method();
+ protverr = 0;
+ break;
+ }
+ /* Deliberately fall through */
+ case TLS1_1_VERSION:
+ if(!(s->options & SSL_OP_NO_TLSv1_1)) {
+ s->version = TLS1_1_VERSION;
+ s->method = TLSv1_1_server_method();
+ protverr = 0;
+ break;
+ }
+ /* Deliberately fall through */
+ case TLS1_VERSION:
+ if(!(s->options & SSL_OP_NO_TLSv1)) {
+ s->version = TLS1_VERSION;
+ s->method = TLSv1_server_method();
+ protverr = 0;
+ break;
+ }
+ /* Deliberately fall through */
+ case SSL3_VERSION:
+#ifndef OPENSSL_NO_SSL3
+ if(!(s->options & SSL_OP_NO_SSLv3)) {
+ s->version = SSL3_VERSION;
+ s->method = SSLv3_server_method();
+ protverr = 0;
+ break;
+ }
+#else
+ break;
+#endif
+ }
+ }
+ } else if (s->client_version <= s->version
+ || s->method->version == DTLS_ANY_VERSION) {
+ /*
+ * For DTLS we just check versions are potentially compatible. Version
+ * negotiation comes later.
+ */
+ protverr = 0;
+ }
+
+ if (protverr) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
+ if ((!s->enc_write_ctx && !s->write_hash)) {
+ /*
+ * similar to ssl3_get_record, send alert using remote version
+ * number
+ */
+ s->version = s->client_version;
+ }
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+
+ /* Parse the message and load client random. */
+ if (is_v2_record) {
+ /*
+ * Handle an SSLv2 backwards compatible ClientHello
+ * Note, this is only for SSLv3+ using the backward compatible format.
+ * Real SSLv2 is not supported, and is rejected above.
+ */
+ unsigned int cipher_len, session_id_len, challenge_len;
+ PACKET challenge;
+
+ if (!PACKET_get_net_2(pkt, &cipher_len)
+ || !PACKET_get_net_2(pkt, &session_id_len)
+ || !PACKET_get_net_2(pkt, &challenge_len)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
+ SSL_R_RECORD_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ if (!PACKET_get_sub_packet(pkt, &cipher_suites, cipher_len)
+ || !PACKET_get_sub_packet(pkt, &session_id, session_id_len)
+ || !PACKET_get_sub_packet(pkt, &challenge, challenge_len)
+ /* No extensions. */
+ || PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_RECORD_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ /* Load the client random */
+ challenge_len = challenge_len > SSL3_RANDOM_SIZE ? SSL3_RANDOM_SIZE :
+ challenge_len;
+ memset(s->s3->client_random, 0, SSL3_RANDOM_SIZE);
+ if (!PACKET_copy_bytes(&challenge,
+ s->s3->client_random + SSL3_RANDOM_SIZE -
+ challenge_len, challenge_len)) {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ PACKET_null_init(&compression);
+ PACKET_null_init(&extensions);
+ } else {
+ /* Regular ClientHello. */
+ if (!PACKET_copy_bytes(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)
+ || !PACKET_get_length_prefixed_1(pkt, &session_id)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ if (SSL_IS_DTLS(s)) {
+ if (!PACKET_get_length_prefixed_1(pkt, &cookie)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ /*
+ * If we require cookies and this ClientHello doesn't contain one,
+ * just return since we do not want to allocate any memory yet.
+ * So check cookie length...
+ */
+ if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
+ if (PACKET_remaining(&cookie) == 0)
+ return 1;
+ }
+ }
+
+ if (!PACKET_get_length_prefixed_2(pkt, &cipher_suites)
+ || !PACKET_get_length_prefixed_1(pkt, &compression)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ /* Could be empty. */
+ extensions = *pkt;
+ }
+
+ s->hit = 0;
+
+ /*
+ * We don't allow resumption in a backwards compatible ClientHello.
+ * TODO(openssl-team): in TLS1.1+, session_id MUST be empty.
+ *
+ * Versions before 0.9.7 always allow clients to resume sessions in
+ * renegotiation. 0.9.7 and later allow this by default, but optionally
+ * ignore resumption requests with flag
+ * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather
+ * than a change to default behavior so that applications relying on
+ * this for security won't even compile against older library versions).
+ * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to
+ * request renegotiation but not a new session (s->new_session remains
+ * unset): for servers, this essentially just means that the
+ * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION setting will be
+ * ignored.
+ */
+ if (is_v2_record ||
+ (s->new_session &&
+ (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) {
+ if (!ssl_get_new_session(s, 1))
+ goto err;
+ } else {
+ i = ssl_get_prev_session(s, &extensions, &session_id);
+ /*
+ * Only resume if the session's version matches the negotiated
+ * version.
+ * RFC 5246 does not provide much useful advice on resumption
+ * with a different protocol version. It doesn't forbid it but
+ * the sanity of such behaviour would be questionable.
+ * In practice, clients do not accept a version mismatch and
+ * will abort the handshake with an error.
+ */
+ if (i == 1 && s->version == s->session->ssl_version) {
+ /* previous session */
+ s->hit = 1;
+ } else if (i == -1) {
+ goto err;
+ } else {
+ /* i == 0 */
+ if (!ssl_get_new_session(s, 1))
+ goto err;
+ }
+ }
+
+ if (SSL_IS_DTLS(s)) {
+ /* Empty cookie was already handled above by returning early. */
+ if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
+ if (s->ctx->app_verify_cookie_cb != NULL) {
+ if (s->ctx->app_verify_cookie_cb(s, PACKET_data(&cookie),
+ PACKET_remaining(&cookie)) == 0) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
+ SSL_R_COOKIE_MISMATCH);
+ goto f_err;
+ /* else cookie verification succeeded */
+ }
+ /* default verification */
+ } else if (!PACKET_equal(&cookie, s->d1->cookie,
+ s->d1->cookie_len)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
+ goto f_err;
+ }
+ s->d1->cookie_verified = 1;
+ }
+ if (s->method->version == DTLS_ANY_VERSION) {
+ /* Select version to use */
+ if (s->client_version <= DTLS1_2_VERSION &&
+ !(s->options & SSL_OP_NO_DTLSv1_2)) {
+ s->version = DTLS1_2_VERSION;
+ s->method = DTLSv1_2_server_method();
+ } else if (tls1_suiteb(s)) {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
+ SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
+ s->version = s->client_version;
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ } else if (s->client_version <= DTLS1_VERSION &&
+ !(s->options & SSL_OP_NO_DTLSv1)) {
+ s->version = DTLS1_VERSION;
+ s->method = DTLSv1_server_method();
+ } else {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
+ SSL_R_WRONG_VERSION_NUMBER);
+ s->version = s->client_version;
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ s->session->ssl_version = s->version;
+ }
+ }
+
+ if (ssl_bytes_to_cipher_list(s, &cipher_suites, &(ciphers),
+ is_v2_record, &al) == NULL) {
+ goto f_err;
+ }
+
+ /* If it is a hit, check that the cipher is in the list */
+ if (s->hit) {
+ j = 0;
+ id = s->session->cipher->id;
+
+#ifdef CIPHER_DEBUG
+ fprintf(stderr, "client sent %d ciphers\n",
+ sk_SSL_CIPHER_num(ciphers));
+#endif
+ for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
+ c = sk_SSL_CIPHER_value(ciphers, i);
+#ifdef CIPHER_DEBUG
+ fprintf(stderr, "client [%2d of %2d]:%s\n",
+ i, sk_SSL_CIPHER_num(ciphers), SSL_CIPHER_get_name(c));
+#endif
+ if (c->id == id) {
+ j = 1;
+ break;
+ }
+ }
+ if (j == 0) {
+ /*
+ * we need to have the cipher in the cipher list if we are asked
+ * to reuse it
+ */
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
+ SSL_R_REQUIRED_CIPHER_MISSING);
+ goto f_err;
+ }
+ }
+
+ complen = PACKET_remaining(&compression);
+ for (j = 0; j < complen; j++) {
+ if (PACKET_data(&compression)[j] == 0)
+ break;
+ }
+
+ if (j >= complen) {
+ /* no compress */
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_NO_COMPRESSION_SPECIFIED);
+ goto f_err;
+ }
+
+ /* TLS extensions */
+ if (s->version >= SSL3_VERSION) {
+ if (!ssl_parse_clienthello_tlsext(s, &extensions)) {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_PARSE_TLSEXT);
+ goto err;
+ }
+ }
+
+ /*
+ * Check if we want to use external pre-shared secret for this handshake
+ * for not reused session only. We need to generate server_random before
+ * calling tls_session_secret_cb in order to allow SessionTicket
+ * processing to use it in key derivation.
+ */
+ {
+ unsigned char *pos;
+ pos = s->s3->server_random;
+ if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE) <= 0) {
+ goto f_err;
+ }
+ }
+
+ if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
+ SSL_CIPHER *pref_cipher = NULL;
+
+ s->session->master_key_length = sizeof(s->session->master_key);
+ if (s->tls_session_secret_cb(s, s->session->master_key,
+ &s->session->master_key_length, ciphers,
+ &pref_cipher,
+ s->tls_session_secret_cb_arg)) {
+ s->hit = 1;
+ s->session->ciphers = ciphers;
+ s->session->verify_result = X509_V_OK;
+
+ ciphers = NULL;
+
+ /* check if some cipher was preferred by call back */
+ pref_cipher =
+ pref_cipher ? pref_cipher : ssl3_choose_cipher(s,
+ s->
+ session->ciphers,
+ SSL_get_ciphers
+ (s));
+ if (pref_cipher == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_NO_SHARED_CIPHER);
+ goto f_err;
+ }
+
+ s->session->cipher = pref_cipher;
+ sk_SSL_CIPHER_free(s->cipher_list);
+ s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
+ sk_SSL_CIPHER_free(s->cipher_list_by_id);
+ s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
+ }
+ }
+
+ /*
+ * Worst case, we will use the NULL compression, but if we have other
+ * options, we will now look for them. We have complen-1 compression
+ * algorithms from the client, starting at q.
+ */
+ s->s3->tmp.new_compression = NULL;
+#ifndef OPENSSL_NO_COMP
+ /* This only happens if we have a cache hit */
+ if (s->session->compress_meth != 0) {
+ int m, comp_id = s->session->compress_meth;
+ unsigned int k;
+ /* Perform sanity checks on resumed compression algorithm */
+ /* Can't disable compression */
+ if (!ssl_allow_compression(s)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
+ SSL_R_INCONSISTENT_COMPRESSION);
+ goto f_err;
+ }
+ /* Look for resumed compression method */
+ for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) {
+ comp = sk_SSL_COMP_value(s->ctx->comp_methods, m);
+ if (comp_id == comp->id) {
+ s->s3->tmp.new_compression = comp;
+ break;
+ }
+ }
+ if (s->s3->tmp.new_compression == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
+ SSL_R_INVALID_COMPRESSION_ALGORITHM);
+ goto f_err;
+ }
+ /* Look for resumed method in compression list */
+ for (k = 0; k < complen; k++) {
+ if (PACKET_data(&compression)[k] == comp_id)
+ break;
+ }
+ if (k >= complen) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
+ SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING);
+ goto f_err;
+ }
+ } else if (s->hit)
+ comp = NULL;
+ else if (ssl_allow_compression(s) && s->ctx->comp_methods) {
+ /* See if we have a match */
+ int m, nn, v, done = 0;
+ unsigned int o;
+
+ nn = sk_SSL_COMP_num(s->ctx->comp_methods);
+ for (m = 0; m < nn; m++) {
+ comp = sk_SSL_COMP_value(s->ctx->comp_methods, m);
+ v = comp->id;
+ for (o = 0; o < complen; o++) {
+ if (v == PACKET_data(&compression)[o]) {
+ done = 1;
+ break;
+ }
+ }
+ if (done)
+ break;
+ }
+ if (done)
+ s->s3->tmp.new_compression = comp;
+ else
+ comp = NULL;
+ }
+#else
+ /*
+ * If compression is disabled we'd better not try to resume a session
+ * using compression.
+ */
+ if (s->session->compress_meth != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
+ goto f_err;
+ }
+#endif
+
+ /*
+ * Given s->session->ciphers and SSL_get_ciphers, we must pick a cipher
+ */
+
+ if (!s->hit) {
+#ifdef OPENSSL_NO_COMP
+ s->session->compress_meth = 0;
+#else
+ s->session->compress_meth = (comp == NULL) ? 0 : comp->id;
+#endif
+ sk_SSL_CIPHER_free(s->session->ciphers);
+ s->session->ciphers = ciphers;
+ if (ciphers == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ ciphers = NULL;
+ if (!tls1_set_server_sigalgs(s)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
+ goto err;
+ }
+ }
+
+ sk_SSL_CIPHER_free(ciphers);
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+ statem_set_error(s);
+
+ sk_SSL_CIPHER_free(ciphers);
+ return MSG_PROCESS_ERROR;
+
+}
+
+enum WORK_STATE tls_post_process_client_hello(SSL *s, enum WORK_STATE wst)
+{
+ int al;
+ SSL_CIPHER *cipher;
+
+ if (wst == WORK_MORE_A) {
+ if (!s->hit) {
+ /* Let cert callback update server certificates if required */
+ if (s->cert->cert_cb) {
+ int rv = s->cert->cert_cb(s, s->cert->cert_cb_arg);
+ if (rv == 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_CERT_CB_ERROR);
+ goto f_err;
+ }
+ if (rv < 0) {
+ s->rwstate = SSL_X509_LOOKUP;
+ return WORK_MORE_A;
+ }
+ s->rwstate = SSL_NOTHING;
+ }
+ cipher = ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
+
+ if (cipher == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_NO_SHARED_CIPHER);
+ goto f_err;
+ }
+ s->s3->tmp.new_cipher = cipher;
+ /* check whether we should disable session resumption */
+ if (s->not_resumable_session_cb != NULL)
+ s->session->not_resumable = s->not_resumable_session_cb(s,
+ ((cipher->algorithm_mkey & (SSL_kDHE | SSL_kECDHE)) != 0));
+ if (s->session->not_resumable)
+ /* do not send a session ticket */
+ s->tlsext_ticket_expected = 0;
+ } else {
+ /* Session-id reuse */
+ s->s3->tmp.new_cipher = s->session->cipher;
+ }
+
+ if (!SSL_USE_SIGALGS(s) || !(s->verify_mode & SSL_VERIFY_PEER)) {
+ if (!ssl3_digest_cached_records(s, 0))
+ goto f_err;
+ }
+
+ /*-
+ * we now have the following setup.
+ * client_random
+ * cipher_list - our prefered list of ciphers
+ * ciphers - the clients prefered list of ciphers
+ * compression - basically ignored right now
+ * ssl version is set - sslv3
+ * s->session - The ssl session has been setup.
+ * s->hit - session reuse flag
+ * s->s3->tmp.new_cipher- the new cipher to use.
+ */
+
+ /* Handles TLS extensions that we couldn't check earlier */
+ if (s->version >= SSL3_VERSION) {
+ if (ssl_check_clienthello_tlsext_late(s) <= 0) {
+ SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
+ goto f_err;
+ }
+ }
+
+ wst = WORK_MORE_B;
+ }
+#ifndef OPENSSL_NO_SRP
+ if (wst == WORK_MORE_B) {
+ int ret;
+ if ((ret = ssl_check_srp_ext_ClientHello(s, &al)) < 0) {
+ /*
+ * callback indicates further work to be done
+ */
+ s->rwstate = SSL_X509_LOOKUP;
+ return WORK_MORE_B;
+ }
+ if (ret != SSL_ERROR_NONE) {
+ /*
+ * This is not really an error but the only means to for
+ * a client to detect whether srp is supported.
+ */
+ if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY)
+ SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO,
+ SSL_R_CLIENTHELLO_TLSEXT);
+ goto f_err;
+ }
+ }
+#endif
+ s->renegotiate = 2;
+
+ return WORK_FINISHED_STOP;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ return WORK_ERROR;
+}
+
+int tls_construct_server_hello(SSL *s)
+{
+ unsigned char *buf;
+ unsigned char *p, *d;
+ int i, sl;
+ int al = 0;
+ unsigned long l;
+
+ buf = (unsigned char *)s->init_buf->data;
+
+ /* Do the message type and length last */
+ d = p = ssl_handshake_start(s);
+
+ *(p++) = s->version >> 8;
+ *(p++) = s->version & 0xff;
+
+ /*
+ * Random stuff. Filling of the server_random takes place in
+ * tls_process_client_hello()
+ */
+ memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
+ p += SSL3_RANDOM_SIZE;
+
+ /*-
+ * There are several cases for the session ID to send
+ * back in the server hello:
+ * - For session reuse from the session cache,
+ * we send back the old session ID.
+ * - If stateless session reuse (using a session ticket)
+ * is successful, we send back the client's "session ID"
+ * (which doesn't actually identify the session).
+ * - If it is a new session, we send back the new
+ * session ID.
+ * - However, if we want the new session to be single-use,
+ * we send back a 0-length session ID.
+ * s->hit is non-zero in either case of session reuse,
+ * so the following won't overwrite an ID that we're supposed
+ * to send back.
+ */
+ if (s->session->not_resumable ||
+ (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)
+ && !s->hit))
+ s->session->session_id_length = 0;
+
+ sl = s->session->session_id_length;
+ if (sl > (int)sizeof(s->session->session_id)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+ *(p++) = sl;
+ memcpy(p, s->session->session_id, sl);
+ p += sl;
+
+ /* put the cipher */
+ i = ssl3_put_cipher_by_char(s->s3->tmp.new_cipher, p);
+ p += i;
+
+ /* put the compression method */
+#ifdef OPENSSL_NO_COMP
+ *(p++) = 0;
+#else
+ if (s->s3->tmp.new_compression == NULL)
+ *(p++) = 0;
+ else
+ *(p++) = s->s3->tmp.new_compression->id;
+#endif
+
+ if (ssl_prepare_serverhello_tlsext(s) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT);
+ statem_set_error(s);
+ return 0;
+ }
+ if ((p =
+ ssl_add_serverhello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
+ &al)) == NULL) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ /* do the header */
+ l = (p - d);
+ if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_HELLO, l)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_server_done(SSL *s)
+{
+ if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_DONE, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_DONE, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ if (!s->s3->tmp.cert_request) {
+ if (!ssl3_digest_cached_records(s, 0)) {
+ statem_set_error(s);
+ }
+ }
+
+ return 1;
+}
+
+int tls_construct_server_key_exchange(SSL *s)
+{
+#ifndef OPENSSL_NO_RSA
+ unsigned char *q;
+ int j, num;
+ RSA *rsa;
+ unsigned char md_buf[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
+ unsigned int u;
+#endif
+#ifndef OPENSSL_NO_DH
+ DH *dh = NULL, *dhp;
+#endif
+#ifndef OPENSSL_NO_EC
+ EC_KEY *ecdh = NULL, *ecdhp;
+ unsigned char *encodedPoint = NULL;
+ int encodedlen = 0;
+ int curve_id = 0;
+ BN_CTX *bn_ctx = NULL;
+#endif
+ EVP_PKEY *pkey;
+ const EVP_MD *md = NULL;
+ unsigned char *p, *d;
+ int al, i;
+ unsigned long type;
+ int n;
+ CERT *cert;
+ BIGNUM *r[4];
+ int nr[4], kn;
+ BUF_MEM *buf;
+ EVP_MD_CTX md_ctx;
+
+ EVP_MD_CTX_init(&md_ctx);
+
+ type = s->s3->tmp.new_cipher->algorithm_mkey;
+ cert = s->cert;
+
+ buf = s->init_buf;
+
+ r[0] = r[1] = r[2] = r[3] = NULL;
+ n = 0;
+#ifndef OPENSSL_NO_PSK
+ if (type & SSL_PSK) {
+ /*
+ * reserve size for record length and PSK identity hint
+ */
+ n += 2;
+ if (s->cert->psk_identity_hint)
+ n += strlen(s->cert->psk_identity_hint);
+ }
+ /* Plain PSK or RSAPSK nothing to do */
+ if (type & (SSL_kPSK | SSL_kRSAPSK)) {
+ } else
+#endif /* !OPENSSL_NO_PSK */
+#ifndef OPENSSL_NO_RSA
+ if (type & SSL_kRSA) {
+ rsa = cert->rsa_tmp;
+ if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) {
+ rsa = s->cert->rsa_tmp_cb(s,
+ SSL_C_IS_EXPORT(s->s3->
+ tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->
+ tmp.new_cipher));
+ if (rsa == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
+ goto f_err;
+ }
+ RSA_up_ref(rsa);
+ cert->rsa_tmp = rsa;
+ }
+ if (rsa == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_RSA_KEY);
+ goto f_err;
+ }
+ r[0] = rsa->n;
+ r[1] = rsa->e;
+ s->s3->tmp.use_rsa_tmp = 1;
+ } else
+#endif
+#ifndef OPENSSL_NO_DH
+ if (type & (SSL_kDHE | SSL_kDHEPSK)) {
+ if (s->cert->dh_tmp_auto) {
+ dhp = ssl_get_auto_dh(s);
+ if (dhp == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ } else
+ dhp = cert->dh_tmp;
+ if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
+ dhp = s->cert->dh_tmp_cb(s,
+ SSL_C_IS_EXPORT(s->s3->
+ tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->
+ tmp.new_cipher));
+ if (dhp == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_DH_KEY);
+ goto f_err;
+ }
+ if (!ssl_security(s, SSL_SECOP_TMP_DH,
+ DH_security_bits(dhp), 0, dhp)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_DH_KEY_TOO_SMALL);
+ goto f_err;
+ }
+ if (s->s3->tmp.dh != NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (s->cert->dh_tmp_auto)
+ dh = dhp;
+ else if ((dh = DHparams_dup(dhp)) == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
+ goto err;
+ }
+
+ s->s3->tmp.dh = dh;
+ if ((dhp->pub_key == NULL ||
+ dhp->priv_key == NULL ||
+ (s->options & SSL_OP_SINGLE_DH_USE))) {
+ if (!DH_generate_key(dh)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
+ goto err;
+ }
+ } else {
+ dh->pub_key = BN_dup(dhp->pub_key);
+ dh->priv_key = BN_dup(dhp->priv_key);
+ if ((dh->pub_key == NULL) || (dh->priv_key == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
+ goto err;
+ }
+ }
+ r[0] = dh->p;
+ r[1] = dh->g;
+ r[2] = dh->pub_key;
+ } else
+#endif
+#ifndef OPENSSL_NO_EC
+ if (type & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ const EC_GROUP *group;
+
+ ecdhp = cert->ecdh_tmp;
+ if (s->cert->ecdh_tmp_auto) {
+ /* Get NID of appropriate shared curve */
+ int nid = tls1_shared_curve(s, -2);
+ if (nid != NID_undef)
+ ecdhp = EC_KEY_new_by_curve_name(nid);
+ } else if ((ecdhp == NULL) && s->cert->ecdh_tmp_cb) {
+ ecdhp = s->cert->ecdh_tmp_cb(s,
+ SSL_C_IS_EXPORT(s->s3->
+ tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->
+ s3->tmp.new_cipher));
+ }
+ if (ecdhp == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_ECDH_KEY);
+ goto f_err;
+ }
+
+ if (s->s3->tmp.ecdh != NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ /* Duplicate the ECDH structure. */
+ if (ecdhp == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+ if (s->cert->ecdh_tmp_auto)
+ ecdh = ecdhp;
+ else if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ s->s3->tmp.ecdh = ecdh;
+ if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
+ (EC_KEY_get0_private_key(ecdh) == NULL) ||
+ (s->options & SSL_OP_SINGLE_ECDH_USE)) {
+ if (!EC_KEY_generate_key(ecdh)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_ECDH_LIB);
+ goto err;
+ }
+ }
+
+ if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
+ (EC_KEY_get0_public_key(ecdh) == NULL) ||
+ (EC_KEY_get0_private_key(ecdh) == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
+ (EC_GROUP_get_degree(group) > 163)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
+ goto err;
+ }
+
+ /*
+ * XXX: For now, we only support ephemeral ECDH keys over named
+ * (not generic) curves. For supported named curves, curve_id is
+ * non-zero.
+ */
+ if ((curve_id =
+ tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
+ == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
+ goto err;
+ }
+
+ /*
+ * Encode the public key. First check the size of encoding and
+ * allocate memory accordingly.
+ */
+ encodedlen = EC_POINT_point2oct(group,
+ EC_KEY_get0_public_key(ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ NULL, 0, NULL);
+
+ encodedPoint = (unsigned char *)
+ OPENSSL_malloc(encodedlen * sizeof(unsigned char));
+ bn_ctx = BN_CTX_new();
+ if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ encodedlen = EC_POINT_point2oct(group,
+ EC_KEY_get0_public_key(ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ encodedPoint, encodedlen, bn_ctx);
+
+ if (encodedlen == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ BN_CTX_free(bn_ctx);
+ bn_ctx = NULL;
+
+ /*
+ * XXX: For now, we only support named (not generic) curves in
+ * ECDH ephemeral key exchanges. In this situation, we need four
+ * additional bytes to encode the entire ServerECDHParams
+ * structure.
+ */
+ n += 4 + encodedlen;
+
+ /*
+ * We'll generate the serverKeyExchange message explicitly so we
+ * can set these to NULLs
+ */
+ r[0] = NULL;
+ r[1] = NULL;
+ r[2] = NULL;
+ r[3] = NULL;
+ } else
+#endif /* !OPENSSL_NO_EC */
+#ifndef OPENSSL_NO_SRP
+ if (type & SSL_kSRP) {
+ if ((s->srp_ctx.N == NULL) ||
+ (s->srp_ctx.g == NULL) ||
+ (s->srp_ctx.s == NULL) || (s->srp_ctx.B == NULL)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_MISSING_SRP_PARAM);
+ goto err;
+ }
+ r[0] = s->srp_ctx.N;
+ r[1] = s->srp_ctx.g;
+ r[2] = s->srp_ctx.s;
+ r[3] = s->srp_ctx.B;
+ } else
+#endif
+ {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
+ goto f_err;
+ }
+ for (i = 0; i < 4 && r[i] != NULL; i++) {
+ nr[i] = BN_num_bytes(r[i]);
+#ifndef OPENSSL_NO_SRP
+ if ((i == 2) && (type & SSL_kSRP))
+ n += 1 + nr[i];
+ else
+#endif
+ n += 2 + nr[i];
+ }
+
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP))
+ && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)) {
+ if ((pkey = ssl_get_sign_pkey(s, s->s3->tmp.new_cipher, &md))
+ == NULL) {
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ kn = EVP_PKEY_size(pkey);
+ } else {
+ pkey = NULL;
+ kn = 0;
+ }
+
+ if (!BUF_MEM_grow_clean(buf, n + SSL_HM_HEADER_LENGTH(s) + kn)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_BUF);
+ goto err;
+ }
+ d = p = ssl_handshake_start(s);
+
+#ifndef OPENSSL_NO_PSK
+ if (type & SSL_PSK) {
+ /* copy PSK identity hint */
+ if (s->cert->psk_identity_hint) {
+ s2n(strlen(s->cert->psk_identity_hint), p);
+ strncpy((char *)p, s->cert->psk_identity_hint,
+ strlen(s->cert->psk_identity_hint));
+ p += strlen(s->cert->psk_identity_hint);
+ } else {
+ s2n(0, p);
+ }
+ }
+#endif
+
+ for (i = 0; i < 4 && r[i] != NULL; i++) {
+#ifndef OPENSSL_NO_SRP
+ if ((i == 2) && (type & SSL_kSRP)) {
+ *p = nr[i];
+ p++;
+ } else
+#endif
+ s2n(nr[i], p);
+ BN_bn2bin(r[i], p);
+ p += nr[i];
+ }
+
+#ifndef OPENSSL_NO_EC
+ if (type & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ /*
+ * XXX: For now, we only support named (not generic) curves. In
+ * this situation, the serverKeyExchange message has: [1 byte
+ * CurveType], [2 byte CurveName] [1 byte length of encoded
+ * point], followed by the actual encoded point itself
+ */
+ *p = NAMED_CURVE_TYPE;
+ p += 1;
+ *p = 0;
+ p += 1;
+ *p = curve_id;
+ p += 1;
+ *p = encodedlen;
+ p += 1;
+ memcpy(p, encodedPoint, encodedlen);
+ OPENSSL_free(encodedPoint);
+ encodedPoint = NULL;
+ p += encodedlen;
+ }
+#endif
+
+ /* not anonymous */
+ if (pkey != NULL) {
+ /*
+ * n is the length of the params, they start at &(d[4]) and p
+ * points to the space at the end.
+ */
+#ifndef OPENSSL_NO_RSA
+ if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
+ q = md_buf;
+ j = 0;
+ for (num = 2; num > 0; num--) {
+ EVP_MD_CTX_set_flags(&md_ctx,
+ EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ EVP_DigestInit_ex(&md_ctx, (num == 2)
+ ? s->ctx->md5 : s->ctx->sha1, NULL);
+ EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(&md_ctx, d, n);
+ EVP_DigestFinal_ex(&md_ctx, q, (unsigned int *)&i);
+ q += i;
+ j += i;
+ }
+ if (RSA_sign(NID_md5_sha1, md_buf, j,
+ &(p[2]), &u, pkey->pkey.rsa) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_RSA);
+ goto err;
+ }
+ s2n(u, p);
+ n += u + 2;
+ } else
+#endif
+ if (md) {
+ /* send signature algorithm */
+ if (SSL_USE_SIGALGS(s)) {
+ if (!tls12_get_sigandhash(p, pkey, md)) {
+ /* Should never happen */
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ p += 2;
+ }
+#ifdef SSL_DEBUG
+ fprintf(stderr, "Using hash %s\n", EVP_MD_name(md));
+#endif
+ EVP_SignInit_ex(&md_ctx, md, NULL);
+ EVP_SignUpdate(&md_ctx, &(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx, &(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx, d, n);
+ if (!EVP_SignFinal(&md_ctx, &(p[2]),
+ (unsigned int *)&i, pkey)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_LIB_EVP);
+ goto err;
+ }
+ s2n(i, p);
+ n += i + 2;
+ if (SSL_USE_SIGALGS(s))
+ n += 2;
+ } else {
+ /* Is this error check actually needed? */
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE,
+ SSL_R_UNKNOWN_PKEY_TYPE);
+ goto f_err;
+ }
+ }
+
+ if (!ssl_set_handshake_header(s, SSL3_MT_SERVER_KEY_EXCHANGE, n)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+ EVP_MD_CTX_cleanup(&md_ctx);
+ return 1;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ err:
+#ifndef OPENSSL_NO_EC
+ OPENSSL_free(encodedPoint);
+ BN_CTX_free(bn_ctx);
+#endif
+ EVP_MD_CTX_cleanup(&md_ctx);
+ statem_set_error(s);
+ return 0;
+}
+
+int tls_construct_certificate_request(SSL *s)
+{
+ unsigned char *p, *d;
+ int i, j, nl, off, n;
+ STACK_OF(X509_NAME) *sk = NULL;
+ X509_NAME *name;
+ BUF_MEM *buf;
+
+ buf = s->init_buf;
+
+ d = p = ssl_handshake_start(s);
+
+ /* get the list of acceptable cert types */
+ p++;
+ n = ssl3_get_req_cert_type(s, p);
+ d[0] = n;
+ p += n;
+ n++;
+
+ if (SSL_USE_SIGALGS(s)) {
+ const unsigned char *psigs;
+ unsigned char *etmp = p;
+ nl = tls12_get_psigalgs(s, &psigs);
+ /* Skip over length for now */
+ p += 2;
+ nl = tls12_copy_sigalgs(s, p, psigs, nl);
+ /* Now fill in length */
+ s2n(nl, etmp);
+ p += nl;
+ n += nl + 2;
+ }
+
+ off = n;
+ p += 2;
+ n += 2;
+
+ sk = SSL_get_client_CA_list(s);
+ nl = 0;
+ if (sk != NULL) {
+ for (i = 0; i < sk_X509_NAME_num(sk); i++) {
+ name = sk_X509_NAME_value(sk, i);
+ j = i2d_X509_NAME(name, NULL);
+ if (!BUF_MEM_grow_clean
+ (buf, SSL_HM_HEADER_LENGTH(s) + n + j + 2)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST,
+ ERR_R_BUF_LIB);
+ goto err;
+ }
+ p = ssl_handshake_start(s) + n;
+ s2n(j, p);
+ i2d_X509_NAME(name, &p);
+ n += 2 + j;
+ nl += 2 + j;
+ }
+ }
+ /* else no CA names */
+ p = ssl_handshake_start(s) + off;
+ s2n(nl, p);
+
+ if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_REQUEST, n)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ s->s3->tmp.cert_request = 1;
+
+ return 1;
+ err:
+ statem_set_error(s);
+ return 0;
+}
+
+enum MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt)
+{
+ int al;
+ unsigned int i;
+ unsigned long alg_k;
+#ifndef OPENSSL_NO_RSA
+ RSA *rsa = NULL;
+ EVP_PKEY *pkey = NULL;
+#endif
+#ifndef OPENSSL_NO_DH
+ BIGNUM *pub = NULL;
+ DH *dh_srvr, *dh_clnt = NULL;
+#endif
+#ifndef OPENSSL_NO_EC
+ EC_KEY *srvr_ecdh = NULL;
+ EVP_PKEY *clnt_pub_pkey = NULL;
+ EC_POINT *clnt_ecpoint = NULL;
+ BN_CTX *bn_ctx = NULL;
+#endif
+ PACKET enc_premaster;
+ unsigned char *data, *rsa_decrypt = NULL;
+
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+#ifndef OPENSSL_NO_PSK
+ /* For PSK parse and retrieve identity, obtain PSK key */
+ if (alg_k & SSL_PSK) {
+ unsigned char psk[PSK_MAX_PSK_LEN];
+ size_t psklen;
+ PACKET psk_identity;
+
+ if (!PACKET_get_length_prefixed_2(pkt, &psk_identity)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if (PACKET_remaining(&psk_identity) > PSK_MAX_IDENTITY_LEN) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_DATA_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+ if (s->psk_server_callback == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_NO_SERVER_CB);
+ goto f_err;
+ }
+
+ if (!PACKET_strndup(&psk_identity, &s->session->psk_identity)) {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ psklen = s->psk_server_callback(s, s->session->psk_identity,
+ psk, sizeof(psk));
+
+ if (psklen > PSK_MAX_PSK_LEN) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ } else if (psklen == 0) {
+ /*
+ * PSK related to the given identity not found
+ */
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_IDENTITY_NOT_FOUND);
+ al = SSL_AD_UNKNOWN_PSK_IDENTITY;
+ goto f_err;
+ }
+
+ OPENSSL_free(s->s3->tmp.psk);
+ s->s3->tmp.psk = BUF_memdup(psk, psklen);
+ OPENSSL_cleanse(psk, psklen);
+
+ if (s->s3->tmp.psk == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+
+ s->s3->tmp.psklen = psklen;
+ }
+ if (alg_k & SSL_kPSK) {
+ /* Identity extracted earlier: should be nothing left */
+ if (PACKET_remaining(pkt) != 0) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ /* PSK handled by ssl_generate_master_secret */
+ if (!ssl_generate_master_secret(s, NULL, 0, 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ } else
+#endif
+#ifndef OPENSSL_NO_RSA
+ if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
+ unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH];
+ int decrypt_len;
+ unsigned char decrypt_good, version_good;
+ size_t j;
+
+ /* FIX THIS UP EAY EAY EAY EAY */
+ if (s->s3->tmp.use_rsa_tmp) {
+ if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
+ rsa = s->cert->rsa_tmp;
+ /*
+ * Don't do a callback because rsa_tmp should be sent already
+ */
+ if (rsa == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_RSA_PKEY);
+ goto f_err;
+
+ }
+ } else {
+ pkey = s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
+ if ((pkey == NULL) ||
+ (pkey->type != EVP_PKEY_RSA) || (pkey->pkey.rsa == NULL)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_RSA_CERTIFICATE);
+ goto f_err;
+ }
+ rsa = pkey->pkey.rsa;
+ }
+
+ /* SSLv3 and pre-standard DTLS omit the length bytes. */
+ if (s->version == SSL3_VERSION || s->version == DTLS1_BAD_VER) {
+ enc_premaster = *pkt;
+ } else {
+ PACKET orig = *pkt;
+ if (!PACKET_get_length_prefixed_2(pkt, &enc_premaster)
+ || PACKET_remaining(pkt) != 0) {
+ /* Try SSLv3 behaviour for TLS. */
+ if (s->options & SSL_OP_TLS_D5_BUG) {
+ enc_premaster = orig;
+ } else {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ }
+ }
+
+ /*
+ * We want to be sure that the plaintext buffer size makes it safe to
+ * iterate over the entire size of a premaster secret
+ * (SSL_MAX_MASTER_KEY_LENGTH). Reject overly short RSA keys because
+ * their ciphertext cannot accommodate a premaster secret anyway.
+ */
+ if (RSA_size(rsa) < SSL_MAX_MASTER_KEY_LENGTH) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ RSA_R_KEY_SIZE_TOO_SMALL);
+ goto f_err;
+ }
+
+ rsa_decrypt = OPENSSL_malloc(RSA_size(rsa));
+ if (rsa_decrypt == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+
+ /*
+ * We must not leak whether a decryption failure occurs because of
+ * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246,
+ * section 7.4.7.1). The code follows that advice of the TLS RFC and
+ * generates a random premaster secret for the case that the decrypt
+ * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1
+ */
+
+ if (RAND_bytes(rand_premaster_secret,
+ sizeof(rand_premaster_secret)) <= 0) {
+ goto err;
+ }
+
+ decrypt_len = RSA_private_decrypt(PACKET_remaining(&enc_premaster),
+ PACKET_data(&enc_premaster),
+ rsa_decrypt, rsa, RSA_PKCS1_PADDING);
+ ERR_clear_error();
+
+ /*
+ * decrypt_len should be SSL_MAX_MASTER_KEY_LENGTH. decrypt_good will
+ * be 0xff if so and zero otherwise.
+ */
+ decrypt_good =
+ constant_time_eq_int_8(decrypt_len, SSL_MAX_MASTER_KEY_LENGTH);
+
+ /*
+ * If the version in the decrypted pre-master secret is correct then
+ * version_good will be 0xff, otherwise it'll be zero. The
+ * Klima-Pokorny-Rosa extension of Bleichenbacher's attack
+ * (http://eprint.iacr.org/2003/052/) exploits the version number
+ * check as a "bad version oracle". Thus version checks are done in
+ * constant time and are treated like any other decryption error.
+ */
+ version_good =
+ constant_time_eq_8(rsa_decrypt[0],
+ (unsigned)(s->client_version >> 8));
+ version_good &=
+ constant_time_eq_8(rsa_decrypt[1],
+ (unsigned)(s->client_version & 0xff));
+
+ /*
+ * The premaster secret must contain the same version number as the
+ * ClientHello to detect version rollback attacks (strangely, the
+ * protocol does not offer such protection for DH ciphersuites).
+ * However, buggy clients exist that send the negotiated protocol
+ * version instead if the server does not support the requested
+ * protocol version. If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such
+ * clients.
+ */
+ if (s->options & SSL_OP_TLS_ROLLBACK_BUG) {
+ unsigned char workaround_good;
+ workaround_good =
+ constant_time_eq_8(rsa_decrypt[0], (unsigned)(s->version >> 8));
+ workaround_good &=
+ constant_time_eq_8(rsa_decrypt[1],
+ (unsigned)(s->version & 0xff));
+ version_good |= workaround_good;
+ }
+
+ /*
+ * Both decryption and version must be good for decrypt_good to
+ * remain non-zero (0xff).
+ */
+ decrypt_good &= version_good;
+
+ /*
+ * Now copy rand_premaster_secret over from p using
+ * decrypt_good_mask. If decryption failed, then p does not
+ * contain valid plaintext, however, a check above guarantees
+ * it is still sufficiently large to read from.
+ */
+ for (j = 0; j < sizeof(rand_premaster_secret); j++) {
+ rsa_decrypt[j] =
+ constant_time_select_8(decrypt_good, rsa_decrypt[j],
+ rand_premaster_secret[j]);
+ }
+
+ if (!ssl_generate_master_secret(s, rsa_decrypt,
+ sizeof(rand_premaster_secret), 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ OPENSSL_free(rsa_decrypt);
+ rsa_decrypt = NULL;
+ } else
+#endif
+#ifndef OPENSSL_NO_DH
+ if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
+ int idx = -1;
+ EVP_PKEY *skey = NULL;
+ PACKET bookmark = *pkt;
+ unsigned char shared[(OPENSSL_DH_MAX_MODULUS_BITS + 7) / 8];
+
+ if (!PACKET_get_net_2(pkt, &i)) {
+ if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
+ goto f_err;
+ }
+ i = 0;
+ }
+ if (PACKET_remaining(pkt) != i) {
+ if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
+ goto err;
+ } else {
+ *pkt = bookmark;
+ i = PACKET_remaining(pkt);
+ }
+ }
+ if (alg_k & SSL_kDHr)
+ idx = SSL_PKEY_DH_RSA;
+ else if (alg_k & SSL_kDHd)
+ idx = SSL_PKEY_DH_DSA;
+ if (idx >= 0) {
+ skey = s->cert->pkeys[idx].privatekey;
+ if ((skey == NULL) ||
+ (skey->type != EVP_PKEY_DH) || (skey->pkey.dh == NULL)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_RSA_CERTIFICATE);
+ goto f_err;
+ }
+ dh_srvr = skey->pkey.dh;
+ } else if (s->s3->tmp.dh == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_DH_KEY);
+ goto f_err;
+ } else
+ dh_srvr = s->s3->tmp.dh;
+
+ if (PACKET_remaining(pkt) == 0L) {
+ /* Get pubkey from cert */
+ EVP_PKEY *clkey = X509_get_pubkey(s->session->peer);
+ if (clkey) {
+ if (EVP_PKEY_cmp_parameters(clkey, skey) == 1)
+ dh_clnt = EVP_PKEY_get1_DH(clkey);
+ }
+ if (dh_clnt == NULL) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_DH_KEY);
+ goto f_err;
+ }
+ EVP_PKEY_free(clkey);
+ pub = dh_clnt->pub_key;
+ } else {
+ if (!PACKET_get_bytes(pkt, &data, i)) {
+ /* We already checked we have enough data */
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ pub = BN_bin2bn(data, i, NULL);
+ }
+ if (pub == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_BN_LIB);
+ goto err;
+ }
+
+ i = DH_compute_key(shared, pub, dh_srvr);
+
+ if (i <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
+ BN_clear_free(pub);
+ goto err;
+ }
+
+ DH_free(s->s3->tmp.dh);
+ s->s3->tmp.dh = NULL;
+ if (dh_clnt)
+ DH_free(dh_clnt);
+ else
+ BN_clear_free(pub);
+ pub = NULL;
+ if (!ssl_generate_master_secret(s, shared, i, 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ if (dh_clnt) {
+ s->no_cert_verify = 1;
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ }
+ } else
+#endif
+
+#ifndef OPENSSL_NO_EC
+ if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
+ int field_size = 0;
+ const EC_KEY *tkey;
+ const EC_GROUP *group;
+ const BIGNUM *priv_key;
+ unsigned char *shared;
+
+ /* initialize structures for server's ECDH key pair */
+ if ((srvr_ecdh = EC_KEY_new()) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Let's get server private key and group information */
+ if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
+ /* use the certificate */
+ tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
+ } else {
+ /*
+ * use the ephermeral values we saved when generating the
+ * ServerKeyExchange msg.
+ */
+ tkey = s->s3->tmp.ecdh;
+ }
+
+ group = EC_KEY_get0_group(tkey);
+ priv_key = EC_KEY_get0_private_key(tkey);
+
+ if (!EC_KEY_set_group(srvr_ecdh, group) ||
+ !EC_KEY_set_private_key(srvr_ecdh, priv_key)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+
+ /* Let's get client's public key */
+ if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (PACKET_remaining(pkt) == 0L) {
+ /* Client Publickey was in Client Certificate */
+
+ if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_MISSING_TMP_ECDH_KEY);
+ goto f_err;
+ }
+ if (((clnt_pub_pkey = X509_get_pubkey(s->session->peer))
+ == NULL) || (clnt_pub_pkey->type != EVP_PKEY_EC)) {
+ /*
+ * XXX: For now, we do not support client authentication
+ * using ECDH certificates so this branch (n == 0L) of the
+ * code is never executed. When that support is added, we
+ * ought to ensure the key received in the certificate is
+ * authorized for key agreement. ECDH_compute_key implicitly
+ * checks that the two ECDH shares are for the same group.
+ */
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
+ goto f_err;
+ }
+
+ if (EC_POINT_copy(clnt_ecpoint,
+ EC_KEY_get0_public_key(clnt_pub_pkey->
+ pkey.ec)) == 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ s->no_cert_verify = 1;
+ } else {
+ /*
+ * Get client's public key from encoded point in the
+ * ClientKeyExchange message.
+ */
+ if ((bn_ctx = BN_CTX_new()) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Get encoded point length */
+ if (!PACKET_get_1(pkt, &i)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if (!PACKET_get_bytes(pkt, &data, i)
+ || PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ if (EC_POINT_oct2point(group, clnt_ecpoint, data, i, bn_ctx) == 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
+ goto err;
+ }
+ }
+
+ /* Compute the shared pre-master secret */
+ field_size = EC_GROUP_get_degree(group);
+ if (field_size <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ goto err;
+ }
+ shared = OPENSSL_malloc((field_size + 7) / 8);
+ if (shared == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ i = ECDH_compute_key(shared, (field_size + 7) / 8, clnt_ecpoint,
+ srvr_ecdh, NULL);
+ if (i <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
+ OPENSSL_free(shared);
+ goto err;
+ }
+
+ EVP_PKEY_free(clnt_pub_pkey);
+ EC_POINT_free(clnt_ecpoint);
+ EC_KEY_free(srvr_ecdh);
+ BN_CTX_free(bn_ctx);
+ EC_KEY_free(s->s3->tmp.ecdh);
+ s->s3->tmp.ecdh = NULL;
+
+ if (!ssl_generate_master_secret(s, shared, i, 1)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ } else
+#endif
+#ifndef OPENSSL_NO_SRP
+ if (alg_k & SSL_kSRP) {
+ if (!PACKET_get_net_2(pkt, &i)
+ || !PACKET_get_bytes(pkt, &data, i)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_BAD_SRP_A_LENGTH);
+ goto f_err;
+ }
+ if ((s->srp_ctx.A = BN_bin2bn(data, i, NULL)) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_BN_LIB);
+ goto err;
+ }
+ if (BN_ucmp(s->srp_ctx.A, s->srp_ctx.N) >= 0
+ || BN_is_zero(s->srp_ctx.A)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_BAD_SRP_PARAMETERS);
+ goto f_err;
+ }
+ OPENSSL_free(s->session->srp_username);
+ s->session->srp_username = BUF_strdup(s->srp_ctx.login);
+ if (s->session->srp_username == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (!srp_generate_server_master_secret(s)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ } else
+#endif /* OPENSSL_NO_SRP */
+ if (alg_k & SSL_kGOST) {
+ EVP_PKEY_CTX *pkey_ctx;
+ EVP_PKEY *client_pub_pkey = NULL, *pk = NULL;
+ unsigned char premaster_secret[32], *start;
+ size_t outlen = 32, inlen;
+ unsigned long alg_a;
+ int Ttag, Tclass;
+ long Tlen;
+ long sess_key_len;
+
+ /* Get our certificate private key */
+ alg_a = s->s3->tmp.new_cipher->algorithm_auth;
+ if (alg_a & SSL_aGOST01)
+ pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey;
+
+ pkey_ctx = EVP_PKEY_CTX_new(pk, NULL);
+ EVP_PKEY_decrypt_init(pkey_ctx);
+ /*
+ * If client certificate is present and is of the same type, maybe
+ * use it for key exchange. Don't mind errors from
+ * EVP_PKEY_derive_set_peer, because it is completely valid to use a
+ * client certificate for authorization only.
+ */
+ client_pub_pkey = X509_get_pubkey(s->session->peer);
+ if (client_pub_pkey) {
+ if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0)
+ ERR_clear_error();
+ }
+ /* Decrypt session key */
+ sess_key_len = PACKET_remaining(pkt);
+ if (!PACKET_get_bytes(pkt, &data, sess_key_len)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ if (ASN1_get_object ((const unsigned char **)&data, &Tlen, &Ttag,
+ &Tclass, sess_key_len) != V_ASN1_CONSTRUCTED
+ || Ttag != V_ASN1_SEQUENCE
+ || Tclass != V_ASN1_UNIVERSAL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_DECRYPTION_FAILED);
+ goto gerr;
+ }
+ start = data;
+ inlen = Tlen;
+ if (EVP_PKEY_decrypt
+ (pkey_ctx, premaster_secret, &outlen, start, inlen) <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE,
+ SSL_R_DECRYPTION_FAILED);
+ goto gerr;
+ }
+ /* Generate master secret */
+ if (!ssl_generate_master_secret(s, premaster_secret,
+ sizeof(premaster_secret), 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ /* Check if pubkey from client certificate was used */
+ if (EVP_PKEY_CTX_ctrl
+ (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
+ s->no_cert_verify = 1;
+
+ EVP_PKEY_free(client_pub_pkey);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ gerr:
+ EVP_PKEY_free(client_pub_pkey);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ goto err;
+ } else {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, SSL_R_UNKNOWN_CIPHER_TYPE);
+ goto f_err;
+ }
+
+ return MSG_PROCESS_CONTINUE_PROCESSING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_SRP)
+ err:
+#endif
+#ifndef OPENSSL_NO_EC
+ EVP_PKEY_free(clnt_pub_pkey);
+ EC_POINT_free(clnt_ecpoint);
+ EC_KEY_free(srvr_ecdh);
+ BN_CTX_free(bn_ctx);
+ OPENSSL_free(rsa_decrypt);
+#endif
+#ifndef OPENSSL_NO_PSK
+ OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
+ s->s3->tmp.psk = NULL;
+#endif
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
+enum WORK_STATE tls_post_process_client_key_exchange(SSL *s,
+ enum WORK_STATE wst)
+{
+#ifndef OPENSSL_NO_SCTP
+ if (wst == WORK_MORE_A) {
+ if (SSL_IS_DTLS(s)) {
+ unsigned char sctpauthkey[64];
+ char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+ /*
+ * Add new shared key for SCTP-Auth, will be ignored if no SCTP
+ * used.
+ */
+ snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ if (SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0) <= 0) {
+ statem_set_error(s);
+ return WORK_ERROR;;
+ }
+
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+ }
+ wst = WORK_MORE_B;
+ }
+
+ if ((wst == WORK_MORE_B)
+ /* Is this SCTP? */
+ && BIO_dgram_is_sctp(SSL_get_wbio(s))
+ /* Are we renegotiating? */
+ && s->renegotiate
+ /* Are we going to skip the CertificateVerify? */
+ && (s->session->peer == NULL || s->no_cert_verify)
+ && BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
+ s->s3->in_read_app_data = 2;
+ s->rwstate = SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ statem_set_sctp_read_sock(s, 1);
+ return WORK_MORE_B;
+ } else {
+ statem_set_sctp_read_sock(s, 0);
+ }
+#endif
+
+ if (s->no_cert_verify) {
+ /* No certificate verify so we no longer need the handshake_buffer */
+ BIO_free(s->s3->handshake_buffer);
+ return WORK_FINISHED_CONTINUE;
+ } else if (SSL_USE_SIGALGS(s)) {
+ if (!s->session->peer) {
+ /* No peer certificate so we no longer need the handshake_buffer */
+ BIO_free(s->s3->handshake_buffer);
+ return WORK_FINISHED_CONTINUE;
+ }
+ if (!s->s3->handshake_buffer) {
+ SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+ /*
+ * For sigalgs freeze the handshake buffer. If we support
+ * extms we've done this already so this is a no-op
+ */
+ if (!ssl3_digest_cached_records(s, 1)) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+ } else {
+ int offset = 0;
+ int dgst_num;
+
+ /*
+ * We need to get hashes here so if there is a client cert,
+ * it can be verified FIXME - digest processing for
+ * CertificateVerify should be generalized. But it is next
+ * step
+ */
+ if (!ssl3_digest_cached_records(s, 0)) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+ for (dgst_num = 0; dgst_num < SSL_MAX_DIGEST; dgst_num++) {
+ if (s->s3->handshake_dgst[dgst_num]) {
+ int dgst_size;
+
+ s->method->ssl3_enc->cert_verify_mac(s,
+ EVP_MD_CTX_type
+ (s->
+ s3->handshake_dgst
+ [dgst_num]),
+ &(s->s3->
+ tmp.cert_verify_md
+ [offset]));
+ dgst_size =
+ EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]);
+ if (dgst_size < 0) {
+ statem_set_error(s);
+ return WORK_ERROR;
+ }
+ offset += dgst_size;
+ }
+ }
+ }
+
+ return WORK_FINISHED_CONTINUE;
+}
+
+enum MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
+{
+ EVP_PKEY *pkey = NULL;
+ unsigned char *sig, *data;
+ int al, ret = MSG_PROCESS_ERROR;
+ int type = 0, i, j;
+ unsigned int len;
+ X509 *peer;
+ const EVP_MD *md = NULL;
+ EVP_MD_CTX mctx;
+ EVP_MD_CTX_init(&mctx);
+
+ peer = s->session->peer;
+ pkey = X509_get_pubkey(peer);
+ type = X509_certificate_type(peer, pkey);
+
+ if (!(type & EVP_PKT_SIGN)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY,
+ SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ goto f_err;
+ }
+
+ /* Check for broken implementations of GOST ciphersuites */
+ /*
+ * If key is GOST and n is exactly 64, it is bare signature without
+ * length field
+ */
+ if (PACKET_remaining(pkt) == 64 && pkey->type == NID_id_GostR3410_2001) {
+ len = 64;
+ } else {
+ if (SSL_USE_SIGALGS(s)) {
+ int rv;
+
+ if (!PACKET_get_bytes(pkt, &sig, 2)) {
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ rv = tls12_check_peer_sigalg(&md, s, sig, pkey);
+ if (rv == -1) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ } else if (rv == 0) {
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+#ifdef SSL_DEBUG
+ fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
+#endif
+ }
+ if (!PACKET_get_net_2(pkt, &len)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ }
+ j = EVP_PKEY_size(pkey);
+ if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)
+ || (PACKET_remaining(pkt) == 0)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_WRONG_SIGNATURE_SIZE);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ if (!PACKET_get_bytes(pkt, &data, len)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ if (SSL_USE_SIGALGS(s)) {
+ long hdatalen = 0;
+ void *hdata;
+ hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
+ if (hdatalen <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+#ifdef SSL_DEBUG
+ fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n",
+ EVP_MD_name(md));
+#endif
+ if (!EVP_VerifyInit_ex(&mctx, md, NULL)
+ || !EVP_VerifyUpdate(&mctx, hdata, hdatalen)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ if (EVP_VerifyFinal(&mctx, data, len, pkey) <= 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);
+ goto f_err;
+ }
+ } else
+#ifndef OPENSSL_NO_RSA
+ if (pkey->type == EVP_PKEY_RSA) {
+ i = RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
+ MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, data, len,
+ pkey->pkey.rsa);
+ if (i < 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_RSA_DECRYPT);
+ goto f_err;
+ }
+ if (i == 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_RSA_SIGNATURE);
+ goto f_err;
+ }
+ } else
+#endif
+#ifndef OPENSSL_NO_DSA
+ if (pkey->type == EVP_PKEY_DSA) {
+ j = DSA_verify(pkey->save_type,
+ &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
+ SHA_DIGEST_LENGTH, data, len, pkey->pkey.dsa);
+ if (j <= 0) {
+ /* bad signature */
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_DSA_SIGNATURE);
+ goto f_err;
+ }
+ } else
+#endif
+#ifndef OPENSSL_NO_EC
+ if (pkey->type == EVP_PKEY_EC) {
+ j = ECDSA_verify(pkey->save_type,
+ &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
+ SHA_DIGEST_LENGTH, data, len, pkey->pkey.ec);
+ if (j <= 0) {
+ /* bad signature */
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_ECDSA_SIGNATURE);
+ goto f_err;
+ }
+ } else
+#endif
+ if (pkey->type == NID_id_GostR3410_2001) {
+ unsigned char signature[64];
+ int idx;
+ EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey, NULL);
+ EVP_PKEY_verify_init(pctx);
+ if (len != 64) {
+ fprintf(stderr, "GOST signature length is %d", len);
+ }
+ for (idx = 0; idx < 64; idx++) {
+ signature[63 - idx] = data[idx];
+ }
+ j = EVP_PKEY_verify(pctx, signature, 64, s->s3->tmp.cert_verify_md,
+ 32);
+ EVP_PKEY_CTX_free(pctx);
+ if (j <= 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_ECDSA_SIGNATURE);
+ goto f_err;
+ }
+ } else {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_UNSUPPORTED_CERTIFICATE;
+ goto f_err;
+ }
+
+ ret = MSG_PROCESS_CONTINUE_PROCESSING;
+ if (0) {
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ }
+ BIO_free(s->s3->handshake_buffer);
+ s->s3->handshake_buffer = NULL;
+ EVP_MD_CTX_cleanup(&mctx);
+ EVP_PKEY_free(pkey);
+ return ret;
+}
+
+enum MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt)
+{
+ int i, al, ret = MSG_PROCESS_ERROR;
+ X509 *x = NULL;
+ unsigned long l, llen;
+ const unsigned char *certstart;
+ unsigned char *certbytes;
+ STACK_OF(X509) *sk = NULL;
+ PACKET spkt;
+
+ if ((sk = sk_X509_new_null()) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+
+ if (!PACKET_get_net_3(pkt, &llen)
+ || !PACKET_get_sub_packet(pkt, &spkt, llen)
+ || PACKET_remaining(pkt) != 0) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ while (PACKET_remaining(&spkt) > 0) {
+ if (!PACKET_get_net_3(&spkt, &l)
+ || !PACKET_get_bytes(&spkt, &certbytes, l)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ certstart = certbytes;
+ x = d2i_X509(NULL, (const unsigned char **)&certbytes, l);
+ if (x == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_ASN1_LIB);
+ goto f_err;
+ }
+ if (certbytes != (certstart + l)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_CERT_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ if (!sk_X509_push(sk, x)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+ x = NULL;
+ }
+
+ if (sk_X509_num(sk) <= 0) {
+ /* TLS does not mind 0 certs returned */
+ if (s->version == SSL3_VERSION) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_NO_CERTIFICATES_RETURNED);
+ goto f_err;
+ }
+ /* Fail for TLS only if we required a certificate */
+ else if ((s->verify_mode & SSL_VERIFY_PEER) &&
+ (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ goto f_err;
+ }
+ /* No client certificate so digest cached records */
+ if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s, 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+ } else {
+ EVP_PKEY *pkey;
+ i = ssl_verify_cert_chain(s, sk);
+ if (i <= 0) {
+ al = ssl_verify_alarm_type(s->verify_result);
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_CERTIFICATE_VERIFY_FAILED);
+ goto f_err;
+ }
+ if (i > 1) {
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, i);
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ goto f_err;
+ }
+ pkey = X509_get_pubkey(sk_X509_value(sk, 0));
+ if (pkey == NULL) {
+ al = SSL3_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE,
+ SSL_R_UNKNOWN_CERTIFICATE_TYPE);
+ goto f_err;
+ }
+ EVP_PKEY_free(pkey);
+ }
+
+ X509_free(s->session->peer);
+ s->session->peer = sk_X509_shift(sk);
+ s->session->verify_result = s->verify_result;
+
+ sk_X509_pop_free(s->session->peer_chain, X509_free);
+ s->session->peer_chain = sk;
+ /*
+ * Inconsistency alert: cert_chain does *not* include the peer's own
+ * certificate, while we do include it in s3_clnt.c
+ */
+ sk = NULL;
+ ret = MSG_PROCESS_CONTINUE_READING;
+ goto done;
+
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ statem_set_error(s);
+ done:
+ X509_free(x);
+ sk_X509_pop_free(sk, X509_free);
+ return ret;
+}
+
+int tls_construct_server_certificate(SSL *s)
+{
+ CERT_PKEY *cpk;
+
+ cpk = ssl_get_server_send_pkey(s);
+ if (cpk == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ if (!ssl3_output_cert_chain(s, cpk)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ statem_set_error(s);
+ return 0;
+ }
+
+ return 1;
+}
+
+int tls_construct_new_session_ticket(SSL *s)
+{
+ unsigned char *senc = NULL;
+ EVP_CIPHER_CTX ctx;
+ HMAC_CTX hctx;
+ unsigned char *p, *macstart;
+ const unsigned char *const_p;
+ int len, slen_full, slen;
+ SSL_SESSION *sess;
+ unsigned int hlen;
+ SSL_CTX *tctx = s->initial_ctx;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+ unsigned char key_name[16];
+
+ /* get session encoding length */
+ slen_full = i2d_SSL_SESSION(s->session, NULL);
+ /*
+ * Some length values are 16 bits, so forget it if session is too
+ * long
+ */
+ if (slen_full == 0 || slen_full > 0xFF00) {
+ statem_set_error(s);
+ return 0;
+ }
+ senc = OPENSSL_malloc(slen_full);
+ if (!senc) {
+ statem_set_error(s);
+ return 0;
+ }
+
+ EVP_CIPHER_CTX_init(&ctx);
+ HMAC_CTX_init(&hctx);
+
+ p = senc;
+ if (!i2d_SSL_SESSION(s->session, &p))
+ goto err;
+
+ /*
+ * create a fresh copy (not shared with other threads) to clean up
+ */
+ const_p = senc;
+ sess = d2i_SSL_SESSION(NULL, &const_p, slen_full);
+ if (sess == NULL)
+ goto err;
+ sess->session_id_length = 0; /* ID is irrelevant for the ticket */
+
+ slen = i2d_SSL_SESSION(sess, NULL);
+ if (slen == 0 || slen > slen_full) { /* shouldn't ever happen */
+ SSL_SESSION_free(sess);
+ goto err;
+ }
+ p = senc;
+ if (!i2d_SSL_SESSION(sess, &p)) {
+ SSL_SESSION_free(sess);
+ goto err;
+ }
+ SSL_SESSION_free(sess);
+
+ /*-
+ * Grow buffer if need be: the length calculation is as
+ * follows handshake_header_length +
+ * 4 (ticket lifetime hint) + 2 (ticket length) +
+ * 16 (key name) + max_iv_len (iv length) +
+ * session_length + max_enc_block_size (max encrypted session
+ * length) + max_md_size (HMAC).
+ */
+ if (!BUF_MEM_grow(s->init_buf,
+ SSL_HM_HEADER_LENGTH(s) + 22 + EVP_MAX_IV_LENGTH +
+ EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
+ goto err;
+
+ p = ssl_handshake_start(s);
+ /*
+ * Initialize HMAC and cipher contexts. If callback present it does
+ * all the work otherwise use generated values from parent ctx.
+ */
+ if (tctx->tlsext_ticket_key_cb) {
+ if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
+ &hctx, 1) < 0)
+ goto err;
+ } else {
+ if (RAND_bytes(iv, 16) <= 0)
+ goto err;
+ if (!EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
+ tctx->tlsext_tick_aes_key, iv))
+ goto err;
+ if (!HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
+ EVP_sha256(), NULL))
+ goto err;
+ memcpy(key_name, tctx->tlsext_tick_key_name, 16);
+ }
+
+ /*
+ * Ticket lifetime hint (advisory only): We leave this unspecified
+ * for resumed session (for simplicity), and guess that tickets for
+ * new sessions will live as long as their sessions.
+ */
+ l2n(s->hit ? 0 : s->session->timeout, p);
+
+ /* Skip ticket length for now */
+ p += 2;
+ /* Output key name */
+ macstart = p;
+ memcpy(p, key_name, 16);
+ p += 16;
+ /* output IV */
+ memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
+ p += EVP_CIPHER_CTX_iv_length(&ctx);
+ /* Encrypt session data */
+ if (!EVP_EncryptUpdate(&ctx, p, &len, senc, slen))
+ goto err;
+ p += len;
+ if (!EVP_EncryptFinal(&ctx, p, &len))
+ goto err;
+ p += len;
+
+ if (!HMAC_Update(&hctx, macstart, p - macstart))
+ goto err;
+ if (!HMAC_Final(&hctx, p, &hlen))
+ goto err;
+
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ HMAC_CTX_cleanup(&hctx);
+
+ p += hlen;
+ /* Now write out lengths: p points to end of data written */
+ /* Total length */
+ len = p - ssl_handshake_start(s);
+ /* Skip ticket lifetime hint */
+ p = ssl_handshake_start(s) + 4;
+ s2n(len - 6, p);
+ if (!ssl_set_handshake_header(s, SSL3_MT_NEWSESSION_TICKET, len))
+ goto err;
+ OPENSSL_free(senc);
+
+ return 1;
+ err:
+ OPENSSL_free(senc);
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ HMAC_CTX_cleanup(&hctx);
+ statem_set_error(s);
+ return 0;
+}
+
+int tls_construct_cert_status(SSL *s)
+{
+ unsigned char *p;
+ /*-
+ * Grow buffer if need be: the length calculation is as
+ * follows 1 (message type) + 3 (message length) +
+ * 1 (ocsp response type) + 3 (ocsp response length)
+ * + (ocsp response)
+ */
+ if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) {
+ statem_set_error(s);
+ return 0;
+ }
+
+ p = (unsigned char *)s->init_buf->data;
+
+ /* do the header */
+ *(p++) = SSL3_MT_CERTIFICATE_STATUS;
+ /* message length */
+ l2n3(s->tlsext_ocsp_resplen + 4, p);
+ /* status type */
+ *(p++) = s->tlsext_status_type;
+ /* length of OCSP response */
+ l2n3(s->tlsext_ocsp_resplen, p);
+ /* actual response */
+ memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
+ /* number of bytes to write */
+ s->init_num = 8 + s->tlsext_ocsp_resplen;
+ s->init_off = 0;
+
+ return 1;
+}
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+/*
+ * tls_process_next_proto reads a Next Protocol Negotiation handshake message.
+ * It sets the next_proto member in s if found
+ */
+enum MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt)
+{
+ PACKET next_proto, padding;
+ size_t next_proto_len;
+
+ /*-
+ * The payload looks like:
+ * uint8 proto_len;
+ * uint8 proto[proto_len];
+ * uint8 padding_len;
+ * uint8 padding[padding_len];
+ */
+ if (!PACKET_get_length_prefixed_1(pkt, &next_proto)
+ || !PACKET_get_length_prefixed_1(pkt, &padding)
+ || PACKET_remaining(pkt) > 0) {
+ SSLerr(SSL_F_TLS_PROCESS_NEXT_PROTO, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ if (!PACKET_memdup(&next_proto, &s->next_proto_negotiated,
+ &next_proto_len)) {
+ s->next_proto_negotiated_len = 0;
+ goto err;
+ }
+
+ s->next_proto_negotiated_len = (unsigned char)next_proto_len;
+
+ return MSG_PROCESS_CONTINUE_READING;
+err:
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+#endif
+
+#define SSLV2_CIPHER_LEN 3
+
+STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,
+ PACKET *cipher_suites,
+ STACK_OF(SSL_CIPHER) **skp,
+ int sslv2format, int *al
+ )
+{
+ const SSL_CIPHER *c;
+ STACK_OF(SSL_CIPHER) *sk;
+ int n;
+ /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
+ unsigned char cipher[SSLV2_CIPHER_LEN];
+
+ s->s3->send_connection_binding = 0;
+
+ n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
+
+ if (PACKET_remaining(cipher_suites) == 0) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
+ *al = SSL_AD_ILLEGAL_PARAMETER;
+ return NULL;
+ }
+
+ if (PACKET_remaining(cipher_suites) % n != 0) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
+ SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
+ *al = SSL_AD_DECODE_ERROR;
+ return NULL;
+ }
+
+ if ((skp == NULL) || (*skp == NULL)) {
+ sk = sk_SSL_CIPHER_new_null(); /* change perhaps later */
+ if(sk == NULL) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return NULL;
+ }
+ } else {
+ sk = *skp;
+ sk_SSL_CIPHER_zero(sk);
+ }
+
+ if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
+ &s->s3->tmp.ciphers_rawlen)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+
+ while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
+ /*
+ * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
+ * first byte set to zero, while true SSLv2 ciphers have a non-zero
+ * first byte. We don't support any true SSLv2 ciphers, so skip them.
+ */
+ if (sslv2format && cipher[0] != '\0')
+ continue;
+
+ /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
+ if ((cipher[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
+ (cipher[n - 1] == (SSL3_CK_SCSV & 0xff))) {
+ /* SCSV fatal if renegotiating */
+ if (s->renegotiate) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
+ SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ goto err;
+ }
+ s->s3->send_connection_binding = 1;
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr, "SCSV received by server\n");
+#endif
+ continue;
+ }
+
+ /* Check for TLS_FALLBACK_SCSV */
+ if ((cipher[n - 2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
+ (cipher[n - 1] == (SSL3_CK_FALLBACK_SCSV & 0xff))) {
+ /*
+ * The SCSV indicates that the client previously tried a higher
+ * version. Fail if the current version is an unexpected
+ * downgrade.
+ */
+ if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL)) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
+ SSL_R_INAPPROPRIATE_FALLBACK);
+ *al = SSL_AD_INAPPROPRIATE_FALLBACK;
+ goto err;
+ }
+ continue;
+ }
+
+ /* For SSLv2-compat, ignore leading 0-byte. */
+ c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher);
+ if (c != NULL) {
+ if (!sk_SSL_CIPHER_push(sk, c)) {
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+ }
+ }
+ if (PACKET_remaining(cipher_suites) > 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (skp != NULL)
+ *skp = sk;
+ return (sk);
+ err:
+ if ((skp == NULL) || (*skp == NULL))
+ sk_SSL_CIPHER_free(sk);
+ return NULL;
+}
+++ /dev/null
-/* ssl/t1_clnt.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-
-static const SSL_METHOD *tls1_get_client_method(int ver);
-static const SSL_METHOD *tls1_get_client_method(int ver)
-{
- if (ver == TLS_ANY_VERSION)
- return TLS_client_method();
- if (ver == TLS1_2_VERSION)
- return TLSv1_2_client_method();
- if (ver == TLS1_1_VERSION)
- return TLSv1_1_client_method();
- if (ver == TLS1_VERSION)
- return TLSv1_client_method();
-#ifndef OPENSSL_NO_SSL3
- if (ver == SSL3_VERSION)
- return (SSLv3_client_method());
-#endif
- return NULL;
-}
-
-IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_client_method,
- ssl_undefined_function,
- ssl3_connect,
- tls1_get_client_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_client_method,
- ssl_undefined_function,
- ssl3_connect,
- tls1_get_client_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_client_method,
- ssl_undefined_function,
- ssl3_connect,
- tls1_get_client_method, TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_client_method,
- ssl_undefined_function,
- ssl3_connect, tls1_get_client_method, TLSv1_enc_data)
-
-#ifndef OPENSSL_NO_SSL3_METHOD
-IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
- ssl_undefined_function,
- ssl3_connect, tls1_get_client_method)
-#endif
+++ /dev/null
-/* ssl/t1_meth.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include <openssl/objects.h>
-#include "ssl_locl.h"
-
-static const SSL_METHOD *tls1_get_method(int ver)
-{
- if (ver == TLS_ANY_VERSION)
- return TLS_method();
- if (ver == TLS1_2_VERSION)
- return TLSv1_2_method();
- if (ver == TLS1_1_VERSION)
- return TLSv1_1_method();
- if (ver == TLS1_VERSION)
- return TLSv1_method();
-#ifndef OPENSSL_NO_SSL3
- if (ver == SSL3_VERSION)
- return (SSLv3_method());
- else
-#endif
- return NULL;
-}
-
-IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_method,
- ssl3_accept,
- ssl3_connect, tls1_get_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_method,
- ssl3_accept,
- ssl3_connect, tls1_get_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_method,
- ssl3_accept,
- ssl3_connect, tls1_get_method, TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_method,
- ssl3_accept,
- ssl3_connect, tls1_get_method, TLSv1_enc_data)
-
-#ifndef OPENSSL_NO_SSL3_METHOD
-IMPLEMENT_ssl3_meth_func(SSLv3_method,
- ssl3_accept, ssl3_connect, tls1_get_method)
-#endif
+++ /dev/null
-/* ssl/t1_srvr.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-
-static const SSL_METHOD *tls1_get_server_method(int ver);
-static const SSL_METHOD *tls1_get_server_method(int ver)
-{
- if (ver == TLS_ANY_VERSION)
- return TLS_server_method();
- if (ver == TLS1_2_VERSION)
- return TLSv1_2_server_method();
- if (ver == TLS1_1_VERSION)
- return TLSv1_1_server_method();
- if (ver == TLS1_VERSION)
- return TLSv1_server_method();
-#ifndef OPENSSL_NO_SSL3
- if (ver == SSL3_VERSION)
- return (SSLv3_server_method());
-#endif
- return NULL;
-}
-
-IMPLEMENT_tls_meth_func(TLS_ANY_VERSION, TLS_server_method,
- ssl3_accept,
- ssl_undefined_function,
- tls1_get_server_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_server_method,
- ssl3_accept,
- ssl_undefined_function,
- tls1_get_server_method, TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_server_method,
- ssl3_accept,
- ssl_undefined_function,
- tls1_get_server_method, TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_server_method,
- ssl3_accept,
- ssl_undefined_function,
- tls1_get_server_method, TLSv1_enc_data)
-
-#ifndef OPENSSL_NO_SSL3_METHOD
-IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
- ssl3_accept,
- ssl_undefined_function, tls1_get_server_method)
-#endif
heartbeat_test.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
heartbeat_test.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
heartbeat_test.o: ../ssl/packet_locl.h ../ssl/record/record.h ../ssl/ssl_locl.h
-heartbeat_test.o: heartbeat_test.c testutil.h
+heartbeat_test.o: ../ssl/statem/statem.h heartbeat_test.c testutil.h
hmactest.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
hmactest.o: ../include/openssl/crypto.h ../include/openssl/e_os2.h
hmactest.o: ../include/openssl/evp.h ../include/openssl/hmac.h
ssltest.o: ../include/openssl/symhacks.h ../include/openssl/tls1.h
ssltest.o: ../include/openssl/x509.h ../include/openssl/x509_vfy.h
ssltest.o: ../include/openssl/x509v3.h ../ssl/packet_locl.h
-ssltest.o: ../ssl/record/record.h ../ssl/ssl_locl.h ssltest.c
+ssltest.o: ../ssl/record/record.h ../ssl/ssl_locl.h ../ssl/statem/statem.h
+ssltest.o: ssltest.c
testutil.o: ../e_os.h ../include/openssl/e_os2.h
testutil.o: ../include/openssl/opensslconf.h testutil.c testutil.h
v3nametest.o: ../e_os.h ../include/openssl/asn1.h ../include/openssl/bio.h
projects / oweals / openssl.git / commitdiff