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
62 #include <openssl/buffer.h>
63 #include <openssl/rand.h>
64 #include <openssl/objects.h>
65 #include <openssl/md5.h>
66 #include <openssl/sha.h>
67 #include <openssl/evp.h>
68 #include <openssl/x509.h>
71 static SSL_METHOD *ssl3_get_server_method(int ver);
72 static int ssl3_get_client_hello(SSL *s);
73 static int ssl3_send_server_hello(SSL *s);
74 static int ssl3_send_server_key_exchange(SSL *s);
75 static int ssl3_send_certificate_request(SSL *s);
76 static int ssl3_send_server_done(SSL *s);
77 static int ssl3_get_cert_verify(SSL *s);
78 static int ssl3_get_client_key_exchange(SSL *s);
79 static int ssl3_get_client_certificate(SSL *s);
80 static int ssl3_send_hello_request(SSL *s);
82 static SSL_METHOD *ssl3_get_server_method(int ver)
84 if (ver == SSL3_VERSION)
85 return(SSLv3_server_method());
90 SSL_METHOD *SSLv3_server_method(void)
93 static SSL_METHOD SSLv3_server_data;
97 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
99 SSLv3_server_data.ssl_accept=ssl3_accept;
100 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
103 return(&SSLv3_server_data);
106 int ssl3_accept(SSL *s)
109 unsigned long l,Time=time(NULL);
114 int new_state,state,skip=0;
116 RAND_seed(&Time,sizeof(Time));
120 if (s->info_callback != NULL)
122 else if (s->ctx->info_callback != NULL)
123 cb=s->ctx->info_callback;
125 /* init things to blank */
126 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
130 /* FIX THIS EAY EAY EAY */
131 /* we don't actually need a cert, we just need a cert or a DH_tmp */
132 if (((s->session == NULL) || (s->session->cert == NULL)) &&
135 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
147 case SSL_ST_RENEGOTIATE:
149 /* s->state=SSL_ST_ACCEPT; */
153 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
154 case SSL_ST_OK|SSL_ST_ACCEPT:
157 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
159 if ((s->version>>8) != 3)
161 /* s->version=SSL3_VERSION; */
162 s->type=SSL_ST_ACCEPT;
164 if (s->init_buf == NULL)
166 if ((buf=BUF_MEM_new()) == NULL)
171 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
179 if (!ssl3_setup_buffers(s))
185 /* Ok, we now need to push on a buffering BIO so that
186 * the output is sent in a way that TCP likes :-)
188 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
192 if (s->state != SSL_ST_RENEGOTIATE)
194 s->state=SSL3_ST_SR_CLNT_HELLO_A;
195 ssl3_init_finished_mac(s);
196 s->ctx->stats.sess_accept++;
200 s->ctx->stats.sess_accept_renegotiate++;
201 s->state=SSL3_ST_SW_HELLO_REQ_A;
205 case SSL3_ST_SW_HELLO_REQ_A:
206 case SSL3_ST_SW_HELLO_REQ_B:
209 ret=ssl3_send_hello_request(s);
210 if (ret <= 0) goto end;
211 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
212 s->state=SSL3_ST_SW_FLUSH;
215 ssl3_init_finished_mac(s);
218 case SSL3_ST_SW_HELLO_REQ_C:
224 case SSL3_ST_SR_CLNT_HELLO_A:
225 case SSL3_ST_SR_CLNT_HELLO_B:
226 case SSL3_ST_SR_CLNT_HELLO_C:
229 ret=ssl3_get_client_hello(s);
230 if (ret <= 0) goto end;
231 s->state=SSL3_ST_SW_SRVR_HELLO_A;
235 case SSL3_ST_SW_SRVR_HELLO_A:
236 case SSL3_ST_SW_SRVR_HELLO_B:
237 ret=ssl3_send_server_hello(s);
238 if (ret <= 0) goto end;
241 s->state=SSL3_ST_SW_CHANGE_A;
243 s->state=SSL3_ST_SW_CERT_A;
247 case SSL3_ST_SW_CERT_A:
248 case SSL3_ST_SW_CERT_B:
249 /* Check if it is anon DH */
250 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
252 ret=ssl3_send_server_certificate(s);
253 if (ret <= 0) goto end;
257 s->state=SSL3_ST_SW_KEY_EXCH_A;
261 case SSL3_ST_SW_KEY_EXCH_A:
262 case SSL3_ST_SW_KEY_EXCH_B:
263 l=s->s3->tmp.new_cipher->algorithms;
264 if (s->session->cert == NULL)
268 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
269 s->session->cert=s->cert;
273 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
274 s->session->cert=s->ctx->default_cert;
279 /* clear this, it may get reset by
280 * send_server_key_exchange */
281 if (s->options & SSL_OP_EPHEMERAL_RSA)
282 s->s3->tmp.use_rsa_tmp=1;
284 s->s3->tmp.use_rsa_tmp=0;
286 /* only send if a DH key exchange, fortezza or
287 * RSA but we have a sign only certificate */
288 if (s->s3->tmp.use_rsa_tmp
289 || (l & (SSL_DH|SSL_kFZA))
291 && (ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
293 && EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
299 ret=ssl3_send_server_key_exchange(s);
300 if (ret <= 0) goto end;
305 s->state=SSL3_ST_SW_CERT_REQ_A;
309 case SSL3_ST_SW_CERT_REQ_A:
310 case SSL3_ST_SW_CERT_REQ_B:
311 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
312 ((s->session->peer != NULL) &&
313 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
315 /* no cert request */
317 s->s3->tmp.cert_request=0;
318 s->state=SSL3_ST_SW_SRVR_DONE_A;
322 s->s3->tmp.cert_request=1;
323 ret=ssl3_send_certificate_request(s);
324 if (ret <= 0) goto end;
325 s->state=SSL3_ST_SW_SRVR_DONE_A;
330 case SSL3_ST_SW_SRVR_DONE_A:
331 case SSL3_ST_SW_SRVR_DONE_B:
332 ret=ssl3_send_server_done(s);
333 if (ret <= 0) goto end;
334 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
335 s->state=SSL3_ST_SW_FLUSH;
339 case SSL3_ST_SW_FLUSH:
340 /* number of bytes to be flushed */
341 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
344 s->rwstate=SSL_WRITING;
345 num1=BIO_flush(s->wbio);
346 if (num1 <= 0) { ret= -1; goto end; }
347 s->rwstate=SSL_NOTHING;
350 s->state=s->s3->tmp.next_state;
353 case SSL3_ST_SR_CERT_A:
354 case SSL3_ST_SR_CERT_B:
355 /* could be sent for a DH cert, even if we
356 * have not asked for it :-) */
357 ret=ssl3_get_client_certificate(s);
358 if (ret <= 0) goto end;
360 s->state=SSL3_ST_SR_KEY_EXCH_A;
363 case SSL3_ST_SR_KEY_EXCH_A:
364 case SSL3_ST_SR_KEY_EXCH_B:
365 ret=ssl3_get_client_key_exchange(s);
366 if (ret <= 0) goto end;
367 s->state=SSL3_ST_SR_CERT_VRFY_A;
370 /* We need to get hashes here so if there is
371 * a client cert, it can be verified */
372 s->method->ssl3_enc->cert_verify_mac(s,
373 &(s->s3->finish_dgst1),
374 &(s->s3->tmp.finish_md[0]));
375 s->method->ssl3_enc->cert_verify_mac(s,
376 &(s->s3->finish_dgst2),
377 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
381 case SSL3_ST_SR_CERT_VRFY_A:
382 case SSL3_ST_SR_CERT_VRFY_B:
384 /* we should decide if we expected this one */
385 ret=ssl3_get_cert_verify(s);
386 if (ret <= 0) goto end;
388 s->state=SSL3_ST_SR_FINISHED_A;
392 case SSL3_ST_SR_FINISHED_A:
393 case SSL3_ST_SR_FINISHED_B:
394 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
395 SSL3_ST_SR_FINISHED_B);
396 if (ret <= 0) goto end;
400 s->state=SSL3_ST_SW_CHANGE_A;
404 case SSL3_ST_SW_CHANGE_A:
405 case SSL3_ST_SW_CHANGE_B:
407 s->session->cipher=s->s3->tmp.new_cipher;
408 if (!s->method->ssl3_enc->setup_key_block(s))
409 { ret= -1; goto end; }
411 ret=ssl3_send_change_cipher_spec(s,
412 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
414 if (ret <= 0) goto end;
415 s->state=SSL3_ST_SW_FINISHED_A;
418 if (!s->method->ssl3_enc->change_cipher_state(s,
419 SSL3_CHANGE_CIPHER_SERVER_WRITE))
427 case SSL3_ST_SW_FINISHED_A:
428 case SSL3_ST_SW_FINISHED_B:
429 ret=ssl3_send_finished(s,
430 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
431 s->method->ssl3_enc->server_finished,
432 s->method->ssl3_enc->server_finished_len);
433 if (ret <= 0) goto end;
434 s->state=SSL3_ST_SW_FLUSH;
436 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
438 s->s3->tmp.next_state=SSL_ST_OK;
443 /* clean a few things up */
444 ssl3_cleanup_key_block(s);
446 BUF_MEM_free(s->init_buf);
449 /* remove buffering on output */
450 ssl_free_wbio_buffer(s);
455 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
457 s->ctx->stats.sess_accept_good++;
459 s->handshake_func=ssl3_accept;
462 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
468 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
474 if (!s->s3->tmp.reuse_message && !skip)
478 if ((ret=BIO_flush(s->wbio)) <= 0)
483 if ((cb != NULL) && (s->state != state))
487 cb(s,SSL_CB_ACCEPT_LOOP,1);
494 /* BIO_flush(s->wbio); */
497 cb(s,SSL_CB_ACCEPT_EXIT,ret);
502 static int ssl3_send_hello_request(SSL *s)
506 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
508 p=(unsigned char *)s->init_buf->data;
509 *(p++)=SSL3_MT_CLIENT_REQUEST;
514 s->state=SSL3_ST_SW_HELLO_REQ_B;
515 /* number of bytes to write */
520 /* SSL3_ST_SW_HELLO_REQ_B */
521 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
524 static int ssl3_get_client_hello(SSL *s)
526 int i,j,ok,al,ret= -1;
529 unsigned char *p,*d,*q;
532 STACK_OF(SSL_CIPHER) *ciphers=NULL;
534 /* We do this so that we will respond with our native type.
535 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
536 * This down switching should be handled by a different method.
537 * If we are SSLv3, we will respond with SSLv3, even if prompted with
540 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
543 s->state=SSL3_ST_SR_CLNT_HELLO_B;
545 n=ssl3_get_message(s,
546 SSL3_ST_SR_CLNT_HELLO_B,
547 SSL3_ST_SR_CLNT_HELLO_C,
548 SSL3_MT_CLIENT_HELLO,
549 SSL3_RT_MAX_PLAIN_LENGTH,
552 if (!ok) return((int)n);
553 d=p=(unsigned char *)s->init_buf->data;
555 /* The version number has already been checked in ssl3_get_message.
556 * I a native TLSv1/SSLv3 method, the match must be correct except
557 * perhaps for the first message */
558 /* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
561 /* load the client random */
562 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
565 /* get the session-id */
571 if (!ssl_get_new_session(s,1))
576 i=ssl_get_prev_session(s,p,j);
578 { /* previous session */
583 if (!ssl_get_new_session(s,1))
590 if ((i == 0) && (j != 0))
592 /* we need a cipher if we are not resuming a session */
593 al=SSL_AD_ILLEGAL_PARAMETER;
594 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
599 /* not enough data */
600 al=SSL_AD_DECODE_ERROR;
601 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
604 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
611 /* If it is a hit, check that the cipher is in the list */
612 if ((s->hit) && (i > 0))
615 id=s->session->cipher->id;
618 printf("client sent %d ciphers\n",sk_num(ciphers));
620 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
622 c=sk_SSL_CIPHER_value(ciphers,i);
624 printf("client [%2d of %2d]:%s\n",
625 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
635 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
637 /* Very bad for multi-threading.... */
638 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
643 /* we need to have the cipher in the cipher
644 * list if we are asked to reuse it */
645 al=SSL_AD_ILLEGAL_PARAMETER;
646 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
657 if (p[j] == 0) break;
664 al=SSL_AD_DECODE_ERROR;
665 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
669 /* Worst case, we will use the NULL compression, but if we have other
670 * options, we will now look for them. We have i-1 compression
671 * algorithms from the client, starting at q. */
672 s->s3->tmp.new_compression=NULL;
673 if (s->ctx->comp_methods != NULL)
674 { /* See if we have a match */
677 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
680 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
693 s->s3->tmp.new_compression=comp;
698 /* TLS does not mind if there is extra stuff */
699 if (s->version == SSL3_VERSION)
703 /* wrong number of bytes,
704 * there could be more to follow */
705 al=SSL_AD_DECODE_ERROR;
706 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
711 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
716 s->session->compress_meth=(comp == NULL)?0:comp->id;
717 if (s->session->ciphers != NULL)
718 sk_SSL_CIPHER_free(s->session->ciphers);
719 s->session->ciphers=ciphers;
722 al=SSL_AD_ILLEGAL_PARAMETER;
723 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
727 c=ssl3_choose_cipher(s,s->session->ciphers,
728 ssl_get_ciphers_by_id(s));
732 al=SSL_AD_HANDSHAKE_FAILURE;
733 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
736 s->s3->tmp.new_cipher=c;
740 /* Session-id reuse */
741 #ifdef REUSE_CIPHER_BUG
742 STACK_OF(SSL_CIPHER) *sk;
746 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
748 sk=s->session->ciphers;
749 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
751 c=sk_SSL_CIPHER_value(sk,i);
752 if (c->algorithms & SSL_eNULL)
754 if (SSL_C_IS_EXPORT(c))
758 s->s3->tmp.new_cipher=nc;
760 s->s3->tmp.new_cipher=ec;
762 s->s3->tmp.new_cipher=s->session->cipher;
766 s->s3->tmp.new_cipher=s->session->cipher;
769 /* we now have the following setup.
771 * cipher_list - our prefered list of ciphers
772 * ciphers - the clients prefered list of ciphers
773 * compression - basically ignored right now
774 * ssl version is set - sslv3
775 * s->session - The ssl session has been setup.
776 * s->hit - sesson reuse flag
777 * s->tmp.new_cipher - the new cipher to use.
784 ssl3_send_alert(s,SSL3_AL_FATAL,al);
787 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
791 static int ssl3_send_server_hello(SSL *s)
796 unsigned long l,Time;
798 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
800 buf=(unsigned char *)s->init_buf->data;
801 p=s->s3->server_random;
802 Time=time(NULL); /* Time */
804 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
805 /* Do the message type and length last */
808 *(p++)=s->version>>8;
809 *(p++)=s->version&0xff;
812 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
815 /* now in theory we have 3 options to sending back the
816 * session id. If it is a re-use, we send back the
817 * old session-id, if it is a new session, we send
818 * back the new session-id or we send back a 0 length
819 * session-id if we want it to be single use.
820 * Currently I will not implement the '0' length session-id
821 * 12-Jan-98 - I'll now support the '0' length stuff.
823 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
824 s->session->session_id_length=0;
826 sl=s->session->session_id_length;
828 memcpy(p,s->session->session_id,sl);
832 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
835 /* put the compression method */
836 if (s->s3->tmp.new_compression == NULL)
839 *(p++)=s->s3->tmp.new_compression->id;
844 *(d++)=SSL3_MT_SERVER_HELLO;
847 s->state=SSL3_ST_CW_CLNT_HELLO_B;
848 /* number of bytes to write */
853 /* SSL3_ST_CW_CLNT_HELLO_B */
854 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
857 static int ssl3_send_server_done(SSL *s)
861 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
863 p=(unsigned char *)s->init_buf->data;
866 *(p++)=SSL3_MT_SERVER_DONE;
871 s->state=SSL3_ST_SW_SRVR_DONE_B;
872 /* number of bytes to write */
877 /* SSL3_ST_CW_CLNT_HELLO_B */
878 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
881 static int ssl3_send_server_key_exchange(SSL *s)
887 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
903 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
905 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
906 cert=s->session->cert;
910 r[0]=r[1]=r[2]=r[3]=NULL;
916 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
918 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
919 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
920 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
921 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
926 al=SSL_AD_HANDSHAKE_FAILURE;
927 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
932 s->s3->tmp.use_rsa_tmp=1;
940 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
941 dhp=cert->dh_tmp_cb(s,
942 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
943 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
946 al=SSL_AD_HANDSHAKE_FAILURE;
947 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
950 if ((dh=DHparams_dup(dhp)) == NULL)
952 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
957 if ((dhp->pub_key == NULL ||
958 dhp->priv_key == NULL ||
959 (s->options & SSL_OP_SINGLE_DH_USE)))
961 if(!DH_generate_key(dh))
963 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
970 dh->pub_key=BN_dup(dhp->pub_key);
971 dh->priv_key=BN_dup(dhp->priv_key);
972 if ((dh->pub_key == NULL) ||
973 (dh->priv_key == NULL))
975 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
986 al=SSL_AD_HANDSHAKE_FAILURE;
987 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
990 for (i=0; r[i] != NULL; i++)
992 nr[i]=BN_num_bytes(r[i]);
996 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
998 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1001 al=SSL_AD_DECODE_ERROR;
1004 kn=EVP_PKEY_size(pkey);
1012 if (!BUF_MEM_grow(buf,n+4+kn))
1014 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1017 d=(unsigned char *)s->init_buf->data;
1020 for (i=0; r[i] != NULL; i++)
1030 /* n is the length of the params, they start at &(d[4])
1031 * and p points to the space at the end. */
1033 if (pkey->type == EVP_PKEY_RSA)
1037 for (num=2; num > 0; num--)
1039 EVP_DigestInit(&md_ctx,(num == 2)
1040 ?s->ctx->md5:s->ctx->sha1);
1041 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1042 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1043 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1044 EVP_DigestFinal(&md_ctx,q,
1045 (unsigned int *)&i);
1049 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1050 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1053 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1061 #if !defined(NO_DSA)
1062 if (pkey->type == EVP_PKEY_DSA)
1065 EVP_SignInit(&md_ctx,EVP_dss1());
1066 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1067 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1068 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1069 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1070 (unsigned int *)&i,pkey))
1072 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1081 /* Is this error check actually needed? */
1082 al=SSL_AD_HANDSHAKE_FAILURE;
1083 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1088 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1091 /* we should now have things packed up, so lets send
1097 /* SSL3_ST_SW_KEY_EXCH_B */
1098 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1100 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1105 static int ssl3_send_certificate_request(SSL *s)
1107 unsigned char *p,*d;
1109 STACK_OF(X509_NAME) *sk=NULL;
1113 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1117 d=p=(unsigned char *)&(buf->data[4]);
1119 /* get the list of acceptable cert types */
1121 n=ssl3_get_req_cert_type(s,p);
1130 sk=SSL_get_client_CA_list(s);
1134 for (i=0; i<sk_X509_NAME_num(sk); i++)
1136 name=sk_X509_NAME_value(sk,i);
1137 j=i2d_X509_NAME(name,NULL);
1138 if (!BUF_MEM_grow(buf,4+n+j+2))
1140 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1143 p=(unsigned char *)&(buf->data[4+n]);
1144 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1147 i2d_X509_NAME(name,&p);
1154 i2d_X509_NAME(name,&p);
1155 j-=2; s2n(j,d); j+=2;
1161 /* else no CA names */
1162 p=(unsigned char *)&(buf->data[4+off]);
1165 d=(unsigned char *)buf->data;
1166 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1169 /* we should now have things packed up, so lets send
1176 /* SSL3_ST_SW_CERT_REQ_B */
1177 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1182 static int ssl3_get_client_key_exchange(SSL *s)
1190 EVP_PKEY *pkey=NULL;
1197 n=ssl3_get_message(s,
1198 SSL3_ST_SR_KEY_EXCH_A,
1199 SSL3_ST_SR_KEY_EXCH_B,
1200 SSL3_MT_CLIENT_KEY_EXCHANGE,
1204 if (!ok) return((int)n);
1205 p=(unsigned char *)s->init_buf->data;
1207 l=s->s3->tmp.new_cipher->algorithms;
1212 /* FIX THIS UP EAY EAY EAY EAY */
1213 if (s->s3->tmp.use_rsa_tmp)
1215 if ((s->session->cert != NULL) &&
1216 (s->session->cert->rsa_tmp != NULL))
1217 rsa=s->session->cert->rsa_tmp;
1218 else if ((s->ctx->default_cert != NULL) &&
1219 (s->ctx->default_cert->rsa_tmp != NULL))
1220 rsa=s->ctx->default_cert->rsa_tmp;
1221 /* Don't do a callback because rsa_tmp should
1222 * be sent already */
1225 al=SSL_AD_HANDSHAKE_FAILURE;
1226 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1233 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1234 if ( (pkey == NULL) ||
1235 (pkey->type != EVP_PKEY_RSA) ||
1236 (pkey->pkey.rsa == NULL))
1238 al=SSL_AD_HANDSHAKE_FAILURE;
1239 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1246 if (s->version > SSL3_VERSION)
1251 if (!(s->options & SSL_OP_TLS_D5_BUG))
1253 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1263 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1266 /* If a bad decrypt, use a random master key */
1267 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1268 ((p[0] != (s->client_version>>8)) ||
1269 (p[1] != (s->client_version & 0xff))))
1273 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1274 (p[0] == (s->version>>8)) &&
1277 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1282 p[0]=(s->version>>8);
1283 p[1]=(s->version & 0xff);
1284 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1285 i=SSL_MAX_MASTER_KEY_LENGTH;
1287 /* else, an SSLeay bug, ssl only server, tls client */
1290 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1292 al=SSL_AD_DECODE_ERROR;
1293 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1297 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1299 al=SSL_AD_DECODE_ERROR;
1300 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1305 s->session->master_key_length=
1306 s->method->ssl3_enc->generate_master_secret(s,
1307 s->session->master_key,
1314 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1319 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1321 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1331 if (n == 0L) /* the parameters are in the cert */
1333 al=SSL_AD_HANDSHAKE_FAILURE;
1334 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1339 if (s->s3->tmp.dh == NULL)
1341 al=SSL_AD_HANDSHAKE_FAILURE;
1342 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1346 dh_srvr=s->s3->tmp.dh;
1349 pub=BN_bin2bn(p,i,NULL);
1352 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1356 i=DH_compute_key(p,pub,dh_srvr);
1360 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1364 DH_free(s->s3->tmp.dh);
1369 s->session->master_key_length=
1370 s->method->ssl3_enc->generate_master_secret(s,
1371 s->session->master_key,p,i);
1376 al=SSL_AD_HANDSHAKE_FAILURE;
1377 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1383 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1384 #if !defined(NO_DH) || !defined(NO_RSA)
1390 static int ssl3_get_cert_verify(SSL *s)
1392 EVP_PKEY *pkey=NULL;
1399 n=ssl3_get_message(s,
1400 SSL3_ST_SR_CERT_VRFY_A,
1401 SSL3_ST_SR_CERT_VRFY_B,
1406 if (!ok) return((int)n);
1408 if (s->session->peer != NULL)
1410 peer=s->session->peer;
1411 pkey=X509_get_pubkey(peer);
1412 type=X509_certificate_type(peer,pkey);
1420 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1422 s->s3->tmp.reuse_message=1;
1423 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1425 al=SSL_AD_UNEXPECTED_MESSAGE;
1426 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1435 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1436 al=SSL_AD_UNEXPECTED_MESSAGE;
1440 if (!(type & EVP_PKT_SIGN))
1442 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1443 al=SSL_AD_ILLEGAL_PARAMETER;
1447 if (s->s3->change_cipher_spec)
1449 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1450 al=SSL_AD_UNEXPECTED_MESSAGE;
1454 /* we now have a signature that we need to verify */
1455 p=(unsigned char *)s->init_buf->data;
1460 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1461 al=SSL_AD_DECODE_ERROR;
1465 j=EVP_PKEY_size(pkey);
1466 if ((i > j) || (n > j) || (n <= 0))
1468 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1469 al=SSL_AD_DECODE_ERROR;
1474 if (pkey->type == EVP_PKEY_RSA)
1476 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1479 al=SSL_AD_DECRYPT_ERROR;
1480 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1483 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1484 memcmp(&(s->s3->tmp.finish_md[0]),p,
1485 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1487 al=SSL_AD_DECRYPT_ERROR;
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1495 if (pkey->type == EVP_PKEY_DSA)
1497 j=DSA_verify(pkey->save_type,
1498 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1499 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1503 al=SSL_AD_DECRYPT_ERROR;
1504 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1511 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1512 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1521 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1524 EVP_PKEY_free(pkey);
1528 static int ssl3_get_client_certificate(SSL *s)
1530 int i,ok,al,ret= -1;
1532 unsigned long l,nc,llen,n;
1533 unsigned char *p,*d,*q;
1534 STACK_OF(X509) *sk=NULL;
1536 n=ssl3_get_message(s,
1540 #if defined(MSDOS) && !defined(WIN32)
1541 1024*30, /* 30k max cert list :-) */
1543 1024*100, /* 100k max cert list :-) */
1547 if (!ok) return((int)n);
1549 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1551 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1552 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1554 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1555 al=SSL_AD_HANDSHAKE_FAILURE;
1558 /* If tls asked for a client cert we must return a 0 list */
1559 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1561 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1562 al=SSL_AD_UNEXPECTED_MESSAGE;
1565 s->s3->tmp.reuse_message=1;
1569 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1571 al=SSL_AD_UNEXPECTED_MESSAGE;
1572 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1575 d=p=(unsigned char *)s->init_buf->data;
1577 if ((sk=sk_X509_new_null()) == NULL)
1579 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1586 al=SSL_AD_DECODE_ERROR;
1587 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1590 for (nc=0; nc<llen; )
1593 if ((l+nc+3) > llen)
1595 al=SSL_AD_DECODE_ERROR;
1596 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1601 x=d2i_X509(NULL,&p,l);
1604 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1609 al=SSL_AD_DECODE_ERROR;
1610 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1613 if (!sk_X509_push(sk,x))
1615 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1622 if (sk_X509_num(sk) <= 0)
1624 /* TLS does not mind 0 certs returned */
1625 if (s->version == SSL3_VERSION)
1627 al=SSL_AD_HANDSHAKE_FAILURE;
1628 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1631 /* Fail for TLS only if we required a certificate */
1632 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1633 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1635 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1636 al=SSL_AD_HANDSHAKE_FAILURE;
1642 i=ssl_verify_cert_chain(s,sk);
1645 al=ssl_verify_alarm_type(s->verify_result);
1646 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1651 /* This should not be needed */
1652 if (s->session->peer != NULL)
1653 X509_free(s->session->peer);
1654 s->session->peer=sk_X509_shift(sk);
1656 /* FIXME: s->session->cert could be a SSL_CTX's struct cert_st!
1657 * struct cert_st is used for too many purposes. It makes
1658 * sense to use the same structure in both SSL_CTX and SSL,
1659 * but then don't put any per-connection data in it. */
1660 #if 0 /* This could become a workaround, but it would still be utterly ugly */
1661 if (!ssl_cert_instantiate(&s->cert, s->ctx->default_cert))
1666 s->session->cert->cert_chain=sk;
1674 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1677 if (x != NULL) X509_free(x);
1678 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1682 int ssl3_send_server_certificate(SSL *s)
1687 if (s->state == SSL3_ST_SW_CERT_A)
1689 x=ssl_get_server_send_cert(s);
1692 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1696 l=ssl3_output_cert_chain(s,x);
1697 s->state=SSL3_ST_SW_CERT_B;
1702 /* SSL3_ST_SW_CERT_B */
1703 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));