2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
59 #define REUSE_CIPHER_BUG
60 #define NETSCAPE_HANG_BUG
64 #include <openssl/buffer.h>
65 #include <openssl/rand.h>
66 #include <openssl/objects.h>
67 #include <openssl/evp.h>
68 #include <openssl/x509.h>
69 #include <openssl/krb5_asn.h>
72 #ifndef OPENSSL_NO_KRB5
74 #endif /* OPENSSL_NO_KRB5 */
76 static SSL_METHOD *ssl3_get_server_method(int ver);
77 static int ssl3_get_client_hello(SSL *s);
78 static int ssl3_check_client_hello(SSL *s);
79 static int ssl3_send_server_hello(SSL *s);
80 static int ssl3_send_server_key_exchange(SSL *s);
81 static int ssl3_send_certificate_request(SSL *s);
82 static int ssl3_send_server_done(SSL *s);
83 static int ssl3_get_client_key_exchange(SSL *s);
84 static int ssl3_get_client_certificate(SSL *s);
85 static int ssl3_get_cert_verify(SSL *s);
86 static int ssl3_send_hello_request(SSL *s);
88 static SSL_METHOD *ssl3_get_server_method(int ver)
90 if (ver == SSL3_VERSION)
91 return(SSLv3_server_method());
96 SSL_METHOD *SSLv3_server_method(void)
99 static SSL_METHOD SSLv3_server_data;
103 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
105 SSLv3_server_data.ssl_accept=ssl3_accept;
106 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
109 return(&SSLv3_server_data);
112 int ssl3_accept(SSL *s)
115 unsigned long l,Time=time(NULL);
119 int new_state,state,skip=0;
121 RAND_add(&Time,sizeof(Time),0);
125 if (s->info_callback != NULL)
127 else if (s->ctx->info_callback != NULL)
128 cb=s->ctx->info_callback;
130 /* init things to blank */
131 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
136 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
146 case SSL_ST_RENEGOTIATE:
148 /* s->state=SSL_ST_ACCEPT; */
152 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
153 case SSL_ST_OK|SSL_ST_ACCEPT:
156 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
158 if ((s->version>>8) != 3)
160 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
163 s->type=SSL_ST_ACCEPT;
165 if (s->init_buf == NULL)
167 if ((buf=BUF_MEM_new()) == NULL)
172 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
180 if (!ssl3_setup_buffers(s))
186 /* Ok, we now need to push on a buffering BIO so that
187 * the output is sent in a way that TCP likes :-)
189 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
193 if (s->state != SSL_ST_RENEGOTIATE)
195 ssl3_init_finished_mac(s);
196 s->state=SSL3_ST_SR_CLNT_HELLO_A;
197 s->ctx->stats.sess_accept++;
201 s->ctx->stats.sess_accept_renegotiate++;
202 s->state=SSL3_ST_SW_HELLO_REQ_A;
206 case SSL3_ST_SW_HELLO_REQ_A:
207 case SSL3_ST_SW_HELLO_REQ_B:
210 ret=ssl3_send_hello_request(s);
211 if (ret <= 0) goto end;
212 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
213 s->state=SSL3_ST_SW_FLUSH;
216 ssl3_init_finished_mac(s);
219 case SSL3_ST_SW_HELLO_REQ_C:
225 case SSL3_ST_SR_CLNT_HELLO_A:
226 case SSL3_ST_SR_CLNT_HELLO_B:
227 case SSL3_ST_SR_CLNT_HELLO_C:
230 ret=ssl3_get_client_hello(s);
231 if (ret <= 0) goto end;
232 s->state=SSL3_ST_SW_SRVR_HELLO_A;
236 case SSL3_ST_SW_SRVR_HELLO_A:
237 case SSL3_ST_SW_SRVR_HELLO_B:
238 ret=ssl3_send_server_hello(s);
239 if (ret <= 0) goto end;
242 s->state=SSL3_ST_SW_CHANGE_A;
244 s->state=SSL3_ST_SW_CERT_A;
248 case SSL3_ST_SW_CERT_A:
249 case SSL3_ST_SW_CERT_B:
250 /* Check if it is anon DH */
251 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
253 ret=ssl3_send_server_certificate(s);
254 if (ret <= 0) goto end;
258 s->state=SSL3_ST_SW_KEY_EXCH_A;
262 case SSL3_ST_SW_KEY_EXCH_A:
263 case SSL3_ST_SW_KEY_EXCH_B:
264 l=s->s3->tmp.new_cipher->algorithms;
266 /* clear this, it may get reset by
267 * send_server_key_exchange */
268 if ((s->options & SSL_OP_EPHEMERAL_RSA)
269 #ifndef OPENSSL_NO_KRB5
271 #endif /* OPENSSL_NO_KRB5 */
273 s->s3->tmp.use_rsa_tmp=1;
275 s->s3->tmp.use_rsa_tmp=0;
277 /* only send if a DH key exchange, fortezza or
278 * RSA but we have a sign only certificate */
279 if (s->s3->tmp.use_rsa_tmp
280 || (l & (SSL_DH|SSL_kFZA))
282 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
283 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
284 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
290 ret=ssl3_send_server_key_exchange(s);
291 if (ret <= 0) goto end;
296 s->state=SSL3_ST_SW_CERT_REQ_A;
300 case SSL3_ST_SW_CERT_REQ_A:
301 case SSL3_ST_SW_CERT_REQ_B:
302 if (/* don't request cert unless asked for it: */
303 !(s->verify_mode & SSL_VERIFY_PEER) ||
304 /* if SSL_VERIFY_CLIENT_ONCE is set,
305 * don't request cert during re-negotiation: */
306 ((s->session->peer != NULL) &&
307 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
308 /* never request cert in anonymous ciphersuites
309 * (see section "Certificate request" in SSL 3 drafts
310 * and in RFC 2246): */
311 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
312 /* ... except when the application insists on verification
313 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
314 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
315 /* never request cert in Kerberos ciphersuites */
316 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
318 /* no cert request */
320 s->s3->tmp.cert_request=0;
321 s->state=SSL3_ST_SW_SRVR_DONE_A;
325 s->s3->tmp.cert_request=1;
326 ret=ssl3_send_certificate_request(s);
327 if (ret <= 0) goto end;
328 #ifndef NETSCAPE_HANG_BUG
329 s->state=SSL3_ST_SW_SRVR_DONE_A;
331 s->state=SSL3_ST_SW_FLUSH;
332 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
338 case SSL3_ST_SW_SRVR_DONE_A:
339 case SSL3_ST_SW_SRVR_DONE_B:
340 ret=ssl3_send_server_done(s);
341 if (ret <= 0) goto end;
342 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
343 s->state=SSL3_ST_SW_FLUSH;
347 case SSL3_ST_SW_FLUSH:
348 /* number of bytes to be flushed */
349 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
352 s->rwstate=SSL_WRITING;
353 num1=BIO_flush(s->wbio);
354 if (num1 <= 0) { ret= -1; goto end; }
355 s->rwstate=SSL_NOTHING;
358 s->state=s->s3->tmp.next_state;
361 case SSL3_ST_SR_CERT_A:
362 case SSL3_ST_SR_CERT_B:
363 /* Check for second client hello (MS SGC) */
364 ret = ssl3_check_client_hello(s);
368 s->state = SSL3_ST_SR_CLNT_HELLO_C;
370 /* could be sent for a DH cert, even if we
371 * have not asked for it :-) */
372 ret=ssl3_get_client_certificate(s);
373 if (ret <= 0) goto end;
375 s->state=SSL3_ST_SR_KEY_EXCH_A;
379 case SSL3_ST_SR_KEY_EXCH_A:
380 case SSL3_ST_SR_KEY_EXCH_B:
381 ret=ssl3_get_client_key_exchange(s);
382 if (ret <= 0) goto end;
383 s->state=SSL3_ST_SR_CERT_VRFY_A;
386 /* We need to get hashes here so if there is
387 * a client cert, it can be verified */
388 s->method->ssl3_enc->cert_verify_mac(s,
389 &(s->s3->finish_dgst1),
390 &(s->s3->tmp.cert_verify_md[0]));
391 s->method->ssl3_enc->cert_verify_mac(s,
392 &(s->s3->finish_dgst2),
393 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
397 case SSL3_ST_SR_CERT_VRFY_A:
398 case SSL3_ST_SR_CERT_VRFY_B:
400 /* we should decide if we expected this one */
401 ret=ssl3_get_cert_verify(s);
402 if (ret <= 0) goto end;
404 s->state=SSL3_ST_SR_FINISHED_A;
408 case SSL3_ST_SR_FINISHED_A:
409 case SSL3_ST_SR_FINISHED_B:
410 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
411 SSL3_ST_SR_FINISHED_B);
412 if (ret <= 0) goto end;
416 s->state=SSL3_ST_SW_CHANGE_A;
420 case SSL3_ST_SW_CHANGE_A:
421 case SSL3_ST_SW_CHANGE_B:
423 s->session->cipher=s->s3->tmp.new_cipher;
424 if (!s->method->ssl3_enc->setup_key_block(s))
425 { ret= -1; goto end; }
427 ret=ssl3_send_change_cipher_spec(s,
428 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
430 if (ret <= 0) goto end;
431 s->state=SSL3_ST_SW_FINISHED_A;
434 if (!s->method->ssl3_enc->change_cipher_state(s,
435 SSL3_CHANGE_CIPHER_SERVER_WRITE))
443 case SSL3_ST_SW_FINISHED_A:
444 case SSL3_ST_SW_FINISHED_B:
445 ret=ssl3_send_finished(s,
446 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
447 s->method->ssl3_enc->server_finished_label,
448 s->method->ssl3_enc->server_finished_label_len);
449 if (ret <= 0) goto end;
450 s->state=SSL3_ST_SW_FLUSH;
452 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
454 s->s3->tmp.next_state=SSL_ST_OK;
459 /* clean a few things up */
460 ssl3_cleanup_key_block(s);
462 BUF_MEM_free(s->init_buf);
465 /* remove buffering on output */
466 ssl_free_wbio_buffer(s);
471 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
473 s->ctx->stats.sess_accept_good++;
475 s->handshake_func=ssl3_accept;
478 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
484 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
490 if (!s->s3->tmp.reuse_message && !skip)
494 if ((ret=BIO_flush(s->wbio)) <= 0)
499 if ((cb != NULL) && (s->state != state))
503 cb(s,SSL_CB_ACCEPT_LOOP,1);
510 /* BIO_flush(s->wbio); */
513 cb(s,SSL_CB_ACCEPT_EXIT,ret);
518 static int ssl3_send_hello_request(SSL *s)
522 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
524 p=(unsigned char *)s->init_buf->data;
525 *(p++)=SSL3_MT_HELLO_REQUEST;
530 s->state=SSL3_ST_SW_HELLO_REQ_B;
531 /* number of bytes to write */
536 /* SSL3_ST_SW_HELLO_REQ_B */
537 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
540 static int ssl3_check_client_hello(SSL *s)
545 n=ssl3_get_message(s,
549 SSL3_RT_MAX_PLAIN_LENGTH,
551 if (!ok) return((int)n);
552 s->s3->tmp.reuse_message = 1;
553 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
555 /* Throw away what we have done so far in the current handshake,
556 * which will now be aborted. (A full SSL_clear would be too much.)
557 * I hope that tmp.dh is the only thing that may need to be cleared
558 * when a handshake is not completed ... */
559 #ifndef OPENSSL_NO_DH
560 if (s->s3->tmp.dh != NULL)
562 DH_free(s->s3->tmp.dh);
563 s->s3->tmp.dh = NULL;
571 static int ssl3_get_client_hello(SSL *s)
573 int i,j,ok,al,ret= -1;
576 unsigned char *p,*d,*q;
579 STACK_OF(SSL_CIPHER) *ciphers=NULL;
581 /* We do this so that we will respond with our native type.
582 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
583 * This down switching should be handled by a different method.
584 * If we are SSLv3, we will respond with SSLv3, even if prompted with
587 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
590 s->state=SSL3_ST_SR_CLNT_HELLO_B;
592 n=ssl3_get_message(s,
593 SSL3_ST_SR_CLNT_HELLO_B,
594 SSL3_ST_SR_CLNT_HELLO_C,
595 SSL3_MT_CLIENT_HELLO,
596 SSL3_RT_MAX_PLAIN_LENGTH,
599 if (!ok) return((int)n);
600 d=p=(unsigned char *)s->init_buf->data;
602 /* use version from inside client hello, not from record header
603 * (may differ: see RFC 2246, Appendix E, second paragraph) */
604 s->client_version=(((int)p[0])<<8)|(int)p[1];
607 /* load the client random */
608 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
611 /* get the session-id */
617 if (!ssl_get_new_session(s,1))
622 i=ssl_get_prev_session(s,p,j);
624 { /* previous session */
631 if (!ssl_get_new_session(s,1))
638 if ((i == 0) && (j != 0))
640 /* we need a cipher if we are not resuming a session */
641 al=SSL_AD_ILLEGAL_PARAMETER;
642 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
647 /* not enough data */
648 al=SSL_AD_DECODE_ERROR;
649 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
652 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
659 /* If it is a hit, check that the cipher is in the list */
660 if ((s->hit) && (i > 0))
663 id=s->session->cipher->id;
666 printf("client sent %d ciphers\n",sk_num(ciphers));
668 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
670 c=sk_SSL_CIPHER_value(ciphers,i);
672 printf("client [%2d of %2d]:%s\n",
673 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
683 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
685 /* Very bad for multi-threading.... */
686 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
691 /* we need to have the cipher in the cipher
692 * list if we are asked to reuse it */
693 al=SSL_AD_ILLEGAL_PARAMETER;
694 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
705 if (p[j] == 0) break;
712 al=SSL_AD_DECODE_ERROR;
713 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
717 /* Worst case, we will use the NULL compression, but if we have other
718 * options, we will now look for them. We have i-1 compression
719 * algorithms from the client, starting at q. */
720 s->s3->tmp.new_compression=NULL;
721 if (s->ctx->comp_methods != NULL)
722 { /* See if we have a match */
725 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
728 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
741 s->s3->tmp.new_compression=comp;
746 /* TLS does not mind if there is extra stuff */
747 if (s->version == SSL3_VERSION)
751 /* wrong number of bytes,
752 * there could be more to follow */
753 al=SSL_AD_DECODE_ERROR;
754 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
759 /* Given s->session->ciphers and SSL_get_ciphers, we must
764 s->session->compress_meth=(comp == NULL)?0:comp->id;
765 if (s->session->ciphers != NULL)
766 sk_SSL_CIPHER_free(s->session->ciphers);
767 s->session->ciphers=ciphers;
770 al=SSL_AD_ILLEGAL_PARAMETER;
771 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
775 c=ssl3_choose_cipher(s,s->session->ciphers,
780 al=SSL_AD_HANDSHAKE_FAILURE;
781 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
784 s->s3->tmp.new_cipher=c;
788 /* Session-id reuse */
789 #ifdef REUSE_CIPHER_BUG
790 STACK_OF(SSL_CIPHER) *sk;
794 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
796 sk=s->session->ciphers;
797 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
799 c=sk_SSL_CIPHER_value(sk,i);
800 if (c->algorithms & SSL_eNULL)
802 if (SSL_C_IS_EXPORT(c))
806 s->s3->tmp.new_cipher=nc;
808 s->s3->tmp.new_cipher=ec;
810 s->s3->tmp.new_cipher=s->session->cipher;
814 s->s3->tmp.new_cipher=s->session->cipher;
817 /* we now have the following setup.
819 * cipher_list - our prefered list of ciphers
820 * ciphers - the clients prefered list of ciphers
821 * compression - basically ignored right now
822 * ssl version is set - sslv3
823 * s->session - The ssl session has been setup.
824 * s->hit - session reuse flag
825 * s->tmp.new_cipher - the new cipher to use.
832 ssl3_send_alert(s,SSL3_AL_FATAL,al);
835 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
839 static int ssl3_send_server_hello(SSL *s)
844 unsigned long l,Time;
846 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
848 buf=(unsigned char *)s->init_buf->data;
849 p=s->s3->server_random;
850 Time=time(NULL); /* Time */
852 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
853 /* Do the message type and length last */
856 *(p++)=s->version>>8;
857 *(p++)=s->version&0xff;
860 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
863 /* now in theory we have 3 options to sending back the
864 * session id. If it is a re-use, we send back the
865 * old session-id, if it is a new session, we send
866 * back the new session-id or we send back a 0 length
867 * session-id if we want it to be single use.
868 * Currently I will not implement the '0' length session-id
869 * 12-Jan-98 - I'll now support the '0' length stuff.
871 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
872 s->session->session_id_length=0;
874 sl=s->session->session_id_length;
876 memcpy(p,s->session->session_id,sl);
880 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
883 /* put the compression method */
884 if (s->s3->tmp.new_compression == NULL)
887 *(p++)=s->s3->tmp.new_compression->id;
892 *(d++)=SSL3_MT_SERVER_HELLO;
895 s->state=SSL3_ST_CW_CLNT_HELLO_B;
896 /* number of bytes to write */
901 /* SSL3_ST_CW_CLNT_HELLO_B */
902 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
905 static int ssl3_send_server_done(SSL *s)
909 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
911 p=(unsigned char *)s->init_buf->data;
914 *(p++)=SSL3_MT_SERVER_DONE;
919 s->state=SSL3_ST_SW_SRVR_DONE_B;
920 /* number of bytes to write */
925 /* SSL3_ST_CW_CLNT_HELLO_B */
926 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
929 static int ssl3_send_server_key_exchange(SSL *s)
931 #ifndef OPENSSL_NO_RSA
935 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
938 #ifndef OPENSSL_NO_DH
952 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
954 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
959 r[0]=r[1]=r[2]=r[3]=NULL;
961 #ifndef OPENSSL_NO_RSA
965 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
967 rsa=s->cert->rsa_tmp_cb(s,
968 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
969 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
972 al=SSL_AD_HANDSHAKE_FAILURE;
973 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
976 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
981 al=SSL_AD_HANDSHAKE_FAILURE;
982 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
987 s->s3->tmp.use_rsa_tmp=1;
991 #ifndef OPENSSL_NO_DH
995 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
996 dhp=s->cert->dh_tmp_cb(s,
997 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
998 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1001 al=SSL_AD_HANDSHAKE_FAILURE;
1002 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1006 if (s->s3->tmp.dh != NULL)
1009 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1013 if ((dh=DHparams_dup(dhp)) == NULL)
1015 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1020 if ((dhp->pub_key == NULL ||
1021 dhp->priv_key == NULL ||
1022 (s->options & SSL_OP_SINGLE_DH_USE)))
1024 if(!DH_generate_key(dh))
1026 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1033 dh->pub_key=BN_dup(dhp->pub_key);
1034 dh->priv_key=BN_dup(dhp->priv_key);
1035 if ((dh->pub_key == NULL) ||
1036 (dh->priv_key == NULL))
1038 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1049 al=SSL_AD_HANDSHAKE_FAILURE;
1050 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1053 for (i=0; r[i] != NULL; i++)
1055 nr[i]=BN_num_bytes(r[i]);
1059 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1061 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1064 al=SSL_AD_DECODE_ERROR;
1067 kn=EVP_PKEY_size(pkey);
1075 if (!BUF_MEM_grow(buf,n+4+kn))
1077 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1080 d=(unsigned char *)s->init_buf->data;
1083 for (i=0; r[i] != NULL; i++)
1093 /* n is the length of the params, they start at &(d[4])
1094 * and p points to the space at the end. */
1095 #ifndef OPENSSL_NO_RSA
1096 if (pkey->type == EVP_PKEY_RSA)
1100 for (num=2; num > 0; num--)
1102 EVP_DigestInit(&md_ctx,(num == 2)
1103 ?s->ctx->md5:s->ctx->sha1);
1104 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1105 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1106 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1107 EVP_DigestFinal(&md_ctx,q,
1108 (unsigned int *)&i);
1112 if (RSA_sign(NID_md5_sha1, md_buf, j,
1113 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1115 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1123 #if !defined(OPENSSL_NO_DSA)
1124 if (pkey->type == EVP_PKEY_DSA)
1127 EVP_SignInit(&md_ctx,EVP_dss1());
1128 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1129 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1130 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1131 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1132 (unsigned int *)&i,pkey))
1134 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1143 /* Is this error check actually needed? */
1144 al=SSL_AD_HANDSHAKE_FAILURE;
1145 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1150 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1153 /* we should now have things packed up, so lets send
1159 s->state = SSL3_ST_SW_KEY_EXCH_B;
1160 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1162 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1167 static int ssl3_send_certificate_request(SSL *s)
1169 unsigned char *p,*d;
1171 STACK_OF(X509_NAME) *sk=NULL;
1175 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1179 d=p=(unsigned char *)&(buf->data[4]);
1181 /* get the list of acceptable cert types */
1183 n=ssl3_get_req_cert_type(s,p);
1192 sk=SSL_get_client_CA_list(s);
1196 for (i=0; i<sk_X509_NAME_num(sk); i++)
1198 name=sk_X509_NAME_value(sk,i);
1199 j=i2d_X509_NAME(name,NULL);
1200 if (!BUF_MEM_grow(buf,4+n+j+2))
1202 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1205 p=(unsigned char *)&(buf->data[4+n]);
1206 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1209 i2d_X509_NAME(name,&p);
1216 i2d_X509_NAME(name,&p);
1217 j-=2; s2n(j,d); j+=2;
1223 /* else no CA names */
1224 p=(unsigned char *)&(buf->data[4+off]);
1227 d=(unsigned char *)buf->data;
1228 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1231 /* we should now have things packed up, so lets send
1236 #ifdef NETSCAPE_HANG_BUG
1237 p=(unsigned char *)s->init_buf->data + s->init_num;
1240 *(p++)=SSL3_MT_SERVER_DONE;
1249 /* SSL3_ST_SW_CERT_REQ_B */
1250 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1255 static int ssl3_get_client_key_exchange(SSL *s)
1261 #ifndef OPENSSL_NO_RSA
1263 EVP_PKEY *pkey=NULL;
1265 #ifndef OPENSSL_NO_DH
1269 #ifndef OPENSSL_NO_KRB5
1271 #endif /* OPENSSL_NO_KRB5 */
1273 n=ssl3_get_message(s,
1274 SSL3_ST_SR_KEY_EXCH_A,
1275 SSL3_ST_SR_KEY_EXCH_B,
1276 SSL3_MT_CLIENT_KEY_EXCHANGE,
1280 if (!ok) return((int)n);
1281 p=(unsigned char *)s->init_buf->data;
1283 l=s->s3->tmp.new_cipher->algorithms;
1285 #ifndef OPENSSL_NO_RSA
1288 /* FIX THIS UP EAY EAY EAY EAY */
1289 if (s->s3->tmp.use_rsa_tmp)
1291 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1292 rsa=s->cert->rsa_tmp;
1293 /* Don't do a callback because rsa_tmp should
1294 * be sent already */
1297 al=SSL_AD_HANDSHAKE_FAILURE;
1298 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1305 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1306 if ( (pkey == NULL) ||
1307 (pkey->type != EVP_PKEY_RSA) ||
1308 (pkey->pkey.rsa == NULL))
1310 al=SSL_AD_HANDSHAKE_FAILURE;
1311 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1318 if (s->version > SSL3_VERSION)
1323 if (!(s->options & SSL_OP_TLS_D5_BUG))
1325 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1335 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1339 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1341 al=SSL_AD_DECODE_ERROR;
1342 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1345 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1347 /* The premaster secret must contain the same version number as the
1348 * ClientHello to detect version rollback attacks (strangely, the
1349 * protocol does not offer such protection for DH ciphersuites).
1350 * However, buggy clients exist that send the negotiated protocol
1351 * version instead if the server does not support the requested
1353 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1354 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1355 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1357 al=SSL_AD_DECODE_ERROR;
1358 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1368 /* Some decryption failure -- use random value instead as countermeasure
1369 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1370 * (see RFC 2246, section 7.4.7.1).
1371 * But note that due to length and protocol version checking, the
1372 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1373 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1374 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1377 i = SSL_MAX_MASTER_KEY_LENGTH;
1378 p[0] = s->client_version >> 8;
1379 p[1] = s->client_version & 0xff;
1380 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1384 s->session->master_key_length=
1385 s->method->ssl3_enc->generate_master_secret(s,
1386 s->session->master_key,
1392 #ifndef OPENSSL_NO_DH
1393 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1398 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1400 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1410 if (n == 0L) /* the parameters are in the cert */
1412 al=SSL_AD_HANDSHAKE_FAILURE;
1413 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1418 if (s->s3->tmp.dh == NULL)
1420 al=SSL_AD_HANDSHAKE_FAILURE;
1421 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1425 dh_srvr=s->s3->tmp.dh;
1428 pub=BN_bin2bn(p,i,NULL);
1431 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1435 i=DH_compute_key(p,pub,dh_srvr);
1439 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1443 DH_free(s->s3->tmp.dh);
1448 s->session->master_key_length=
1449 s->method->ssl3_enc->generate_master_secret(s,
1450 s->session->master_key,p,i);
1455 #ifndef OPENSSL_NO_KRB5
1458 krb5_error_code krb5rc;
1459 krb5_data enc_ticket;
1460 krb5_data authenticator;
1462 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1463 EVP_CIPHER_CTX ciph_ctx;
1464 EVP_CIPHER *enc = NULL;
1465 unsigned char iv[EVP_MAX_IV_LENGTH];
1466 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH];
1467 int padl, outl = sizeof(pms);
1468 krb5_timestamp authtime = 0;
1469 krb5_ticket_times ttimes;
1471 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1474 enc_ticket.length = i;
1475 enc_ticket.data = p;
1476 p+=enc_ticket.length;
1479 authenticator.length = i;
1480 authenticator.data = p;
1481 p+=authenticator.length;
1488 if (n != enc_ticket.length + authenticator.length +
1491 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1492 SSL_R_DATA_LENGTH_TOO_LONG);
1496 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1500 printf("kssl_sget_tkt rtn %d [%d]\n",
1501 krb5rc, kssl_err.reason);
1503 printf("kssl_err text= %s\n", kssl_err.text);
1504 #endif /* KSSL_DEBUG */
1505 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1510 /* Note: no authenticator is not considered an error,
1511 ** but will return authtime == 0.
1513 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1514 &authtime, &kssl_err)) != 0)
1517 printf("kssl_check_authent rtn %d [%d]\n",
1518 krb5rc, kssl_err.reason);
1520 printf("kssl_err text= %s\n", kssl_err.text);
1521 #endif /* KSSL_DEBUG */
1522 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1527 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1529 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
1534 kssl_ctx_show(kssl_ctx);
1535 #endif /* KSSL_DEBUG */
1537 enc = kssl_map_enc(kssl_ctx->enctype);
1538 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1540 EVP_DecryptInit(&ciph_ctx,enc,kssl_ctx->key,iv);
1541 EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1542 enc_pms.data, enc_pms.length);
1543 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1545 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1546 SSL_R_DATA_LENGTH_TOO_LONG);
1549 EVP_DecryptFinal(&ciph_ctx,&(pms[outl]),&padl);
1551 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1553 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1554 SSL_R_DATA_LENGTH_TOO_LONG);
1557 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1559 s->session->master_key_length=
1560 s->method->ssl3_enc->generate_master_secret(s,
1561 s->session->master_key, pms, outl);
1563 /* Was doing kssl_ctx_free() here,
1564 ** but it caused problems for apache.
1565 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1566 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1570 #endif /* OPENSSL_NO_KRB5 */
1572 al=SSL_AD_HANDSHAKE_FAILURE;
1573 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1574 SSL_R_UNKNOWN_CIPHER_TYPE);
1580 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1581 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA)
1587 static int ssl3_get_cert_verify(SSL *s)
1589 EVP_PKEY *pkey=NULL;
1596 n=ssl3_get_message(s,
1597 SSL3_ST_SR_CERT_VRFY_A,
1598 SSL3_ST_SR_CERT_VRFY_B,
1603 if (!ok) return((int)n);
1605 if (s->session->peer != NULL)
1607 peer=s->session->peer;
1608 pkey=X509_get_pubkey(peer);
1609 type=X509_certificate_type(peer,pkey);
1617 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1619 s->s3->tmp.reuse_message=1;
1620 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1622 al=SSL_AD_UNEXPECTED_MESSAGE;
1623 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1632 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1633 al=SSL_AD_UNEXPECTED_MESSAGE;
1637 if (!(type & EVP_PKT_SIGN))
1639 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1640 al=SSL_AD_ILLEGAL_PARAMETER;
1644 if (s->s3->change_cipher_spec)
1646 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1647 al=SSL_AD_UNEXPECTED_MESSAGE;
1651 /* we now have a signature that we need to verify */
1652 p=(unsigned char *)s->init_buf->data;
1657 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1658 al=SSL_AD_DECODE_ERROR;
1662 j=EVP_PKEY_size(pkey);
1663 if ((i > j) || (n > j) || (n <= 0))
1665 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1666 al=SSL_AD_DECODE_ERROR;
1670 #ifndef OPENSSL_NO_RSA
1671 if (pkey->type == EVP_PKEY_RSA)
1673 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1674 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1678 al=SSL_AD_DECRYPT_ERROR;
1679 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1684 al=SSL_AD_DECRYPT_ERROR;
1685 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1691 #ifndef OPENSSL_NO_DSA
1692 if (pkey->type == EVP_PKEY_DSA)
1694 j=DSA_verify(pkey->save_type,
1695 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1696 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1700 al=SSL_AD_DECRYPT_ERROR;
1701 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1708 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
1709 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1718 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1721 EVP_PKEY_free(pkey);
1725 static int ssl3_get_client_certificate(SSL *s)
1727 int i,ok,al,ret= -1;
1729 unsigned long l,nc,llen,n;
1730 unsigned char *p,*d,*q;
1731 STACK_OF(X509) *sk=NULL;
1733 n=ssl3_get_message(s,
1737 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
1738 1024*30, /* 30k max cert list :-) */
1740 1024*100, /* 100k max cert list :-) */
1744 if (!ok) return((int)n);
1746 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1748 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1749 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1751 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1752 al=SSL_AD_HANDSHAKE_FAILURE;
1755 /* If tls asked for a client cert, the client must return a 0 list */
1756 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1758 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1759 al=SSL_AD_UNEXPECTED_MESSAGE;
1762 s->s3->tmp.reuse_message=1;
1766 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1768 al=SSL_AD_UNEXPECTED_MESSAGE;
1769 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1772 d=p=(unsigned char *)s->init_buf->data;
1774 if ((sk=sk_X509_new_null()) == NULL)
1776 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1783 al=SSL_AD_DECODE_ERROR;
1784 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1787 for (nc=0; nc<llen; )
1790 if ((l+nc+3) > llen)
1792 al=SSL_AD_DECODE_ERROR;
1793 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1798 x=d2i_X509(NULL,&p,l);
1801 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1806 al=SSL_AD_DECODE_ERROR;
1807 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1810 if (!sk_X509_push(sk,x))
1812 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1819 if (sk_X509_num(sk) <= 0)
1821 /* TLS does not mind 0 certs returned */
1822 if (s->version == SSL3_VERSION)
1824 al=SSL_AD_HANDSHAKE_FAILURE;
1825 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1828 /* Fail for TLS only if we required a certificate */
1829 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1830 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1832 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1833 al=SSL_AD_HANDSHAKE_FAILURE;
1839 i=ssl_verify_cert_chain(s,sk);
1842 al=ssl_verify_alarm_type(s->verify_result);
1843 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1848 if (s->session->peer != NULL) /* This should not be needed */
1849 X509_free(s->session->peer);
1850 s->session->peer=sk_X509_shift(sk);
1851 s->session->verify_result = s->verify_result;
1853 /* With the current implementation, sess_cert will always be NULL
1854 * when we arrive here. */
1855 if (s->session->sess_cert == NULL)
1857 s->session->sess_cert = ssl_sess_cert_new();
1858 if (s->session->sess_cert == NULL)
1860 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1864 if (s->session->sess_cert->cert_chain != NULL)
1865 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1866 s->session->sess_cert->cert_chain=sk;
1867 /* Inconsistency alert: cert_chain does *not* include the
1868 * peer's own certificate, while we do include it in s3_clnt.c */
1876 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1879 if (x != NULL) X509_free(x);
1880 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1884 int ssl3_send_server_certificate(SSL *s)
1889 if (s->state == SSL3_ST_SW_CERT_A)
1891 x=ssl_get_server_send_cert(s);
1893 /* VRS: allow null cert if auth == KRB5 */
1894 (s->s3->tmp.new_cipher->algorithms
1895 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
1896 != (SSL_aKRB5|SSL_kKRB5))
1898 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
1902 l=ssl3_output_cert_chain(s,x);
1903 s->state=SSL3_ST_SW_CERT_B;
1908 /* SSL3_ST_SW_CERT_B */
1909 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));