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
70 /* SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_MALLOC_FAILURE);
71 * SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
72 * SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
73 * SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_MALLOC_FAILURE);
74 * SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
78 static SSL_METHOD *ssl3_get_server_method(int ver);
79 static int ssl3_get_client_hello(SSL *s);
80 static int ssl3_send_server_hello(SSL *s);
81 static int ssl3_send_server_key_exchange(SSL *s);
82 static int ssl3_send_certificate_request(SSL *s);
83 static int ssl3_send_server_done(SSL *s);
84 static int ssl3_get_cert_verify(SSL *s);
85 static int ssl3_get_client_key_exchange(SSL *s);
86 static int ssl3_get_client_certificate(SSL *s);
87 static int ssl3_send_hello_request(SSL *s);
91 static SSL_METHOD *ssl3_get_server_method();
92 static int ssl3_get_client_hello();
93 static int ssl3_send_server_hello();
94 static int ssl3_send_server_key_exchange();
95 static int ssl3_send_certificate_request();
96 static int ssl3_send_server_done();
97 static int ssl3_get_cert_verify();
98 static int ssl3_get_client_key_exchange();
99 static int ssl3_get_client_certificate();
100 static int ssl3_send_hello_request();
104 static SSL_METHOD *ssl3_get_server_method(ver)
107 if (ver == SSL3_VERSION)
108 return(SSLv3_server_method());
113 SSL_METHOD *SSLv3_server_method()
116 static SSL_METHOD SSLv3_server_data;
121 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
123 SSLv3_server_data.ssl_accept=ssl3_accept;
124 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
126 return(&SSLv3_server_data);
133 unsigned long l,Time=time(NULL);
138 int new_state,state,skip=0;
140 RAND_seed(&Time,sizeof(Time));
144 if (s->info_callback != NULL)
146 else if (s->ctx->info_callback != NULL)
147 cb=s->ctx->info_callback;
149 /* init things to blank */
150 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
154 /* FIX THIS EAY EAY EAY */
155 /* we don't actually need a cert, we just need a cert or a DH_tmp */
156 if (((s->session == NULL) || (s->session->cert == NULL)) &&
159 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
171 case SSL_ST_RENEGOTIATE:
173 /* s->state=SSL_ST_ACCEPT; */
177 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
178 case SSL_ST_OK|SSL_ST_ACCEPT:
181 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
183 if ((s->version>>8) != 3)
185 /* s->version=SSL3_VERSION; */
186 s->type=SSL_ST_ACCEPT;
188 if (s->init_buf == NULL)
190 if ((buf=BUF_MEM_new()) == NULL)
195 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
203 if (!ssl3_setup_buffers(s))
209 /* Ok, we now need to push on a buffering BIO so that
210 * the output is sent in a way that TCP likes :-)
212 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
216 if (s->state != SSL_ST_RENEGOTIATE)
218 s->state=SSL3_ST_SR_CLNT_HELLO_A;
219 ssl3_init_finished_mac(s);
220 s->ctx->stats.sess_accept++;
224 s->ctx->stats.sess_accept_renegotiate++;
225 s->state=SSL3_ST_SW_HELLO_REQ_A;
229 case SSL3_ST_SW_HELLO_REQ_A:
230 case SSL3_ST_SW_HELLO_REQ_B:
233 ret=ssl3_send_hello_request(s);
234 if (ret <= 0) goto end;
235 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
236 s->state=SSL3_ST_SW_FLUSH;
239 ssl3_init_finished_mac(s);
242 case SSL3_ST_SW_HELLO_REQ_C:
248 case SSL3_ST_SR_CLNT_HELLO_A:
249 case SSL3_ST_SR_CLNT_HELLO_B:
250 case SSL3_ST_SR_CLNT_HELLO_C:
253 ret=ssl3_get_client_hello(s);
254 if (ret <= 0) goto end;
255 s->state=SSL3_ST_SW_SRVR_HELLO_A;
259 case SSL3_ST_SW_SRVR_HELLO_A:
260 case SSL3_ST_SW_SRVR_HELLO_B:
261 ret=ssl3_send_server_hello(s);
262 if (ret <= 0) goto end;
265 s->state=SSL3_ST_SW_CHANGE_A;
267 s->state=SSL3_ST_SW_CERT_A;
271 case SSL3_ST_SW_CERT_A:
272 case SSL3_ST_SW_CERT_B:
273 /* Check if it is anon DH */
274 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
276 ret=ssl3_send_server_certificate(s);
277 if (ret <= 0) goto end;
281 s->state=SSL3_ST_SW_KEY_EXCH_A;
285 case SSL3_ST_SW_KEY_EXCH_A:
286 case SSL3_ST_SW_KEY_EXCH_B:
287 l=s->s3->tmp.new_cipher->algorithms;
288 if (s->session->cert == NULL)
292 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
293 s->session->cert=s->cert;
297 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
298 s->session->cert=s->ctx->default_cert;
303 /* clear this, it may get reset by
304 * send_server_key_exchange */
305 if (s->options & SSL_OP_EPHEMERAL_RSA)
306 s->s3->tmp.use_rsa_tmp=1;
308 s->s3->tmp.use_rsa_tmp=0;
310 /* only send if a DH key exchange, fortezza or
311 * RSA but we have a sign only certificate */
312 if (s->s3->tmp.use_rsa_tmp
313 || (l & (SSL_DH|SSL_kFZA))
315 && (ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
317 && EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
323 ret=ssl3_send_server_key_exchange(s);
324 if (ret <= 0) goto end;
329 s->state=SSL3_ST_SW_CERT_REQ_A;
333 case SSL3_ST_SW_CERT_REQ_A:
334 case SSL3_ST_SW_CERT_REQ_B:
335 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
336 ((s->session->peer != NULL) &&
337 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
339 /* no cert request */
341 s->s3->tmp.cert_request=0;
342 s->state=SSL3_ST_SW_SRVR_DONE_A;
346 s->s3->tmp.cert_request=1;
347 ret=ssl3_send_certificate_request(s);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_SW_SRVR_DONE_A;
354 case SSL3_ST_SW_SRVR_DONE_A:
355 case SSL3_ST_SW_SRVR_DONE_B:
356 ret=ssl3_send_server_done(s);
357 if (ret <= 0) goto end;
358 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
359 s->state=SSL3_ST_SW_FLUSH;
363 case SSL3_ST_SW_FLUSH:
364 /* number of bytes to be flushed */
365 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
368 s->rwstate=SSL_WRITING;
369 num1=BIO_flush(s->wbio);
370 if (num1 <= 0) { ret= -1; goto end; }
371 s->rwstate=SSL_NOTHING;
374 s->state=s->s3->tmp.next_state;
377 case SSL3_ST_SR_CERT_A:
378 case SSL3_ST_SR_CERT_B:
379 /* could be sent for a DH cert, even if we
380 * have not asked for it :-) */
381 ret=ssl3_get_client_certificate(s);
382 if (ret <= 0) goto end;
384 s->state=SSL3_ST_SR_KEY_EXCH_A;
387 case SSL3_ST_SR_KEY_EXCH_A:
388 case SSL3_ST_SR_KEY_EXCH_B:
389 ret=ssl3_get_client_key_exchange(s);
390 if (ret <= 0) goto end;
391 s->state=SSL3_ST_SR_CERT_VRFY_A;
394 /* We need to get hashes here so if there is
395 * a client cert, it can be verified */
396 s->method->ssl3_enc->cert_verify_mac(s,
397 &(s->s3->finish_dgst1),
398 &(s->s3->tmp.finish_md[0]));
399 s->method->ssl3_enc->cert_verify_mac(s,
400 &(s->s3->finish_dgst2),
401 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
405 case SSL3_ST_SR_CERT_VRFY_A:
406 case SSL3_ST_SR_CERT_VRFY_B:
408 /* we should decide if we expected this one */
409 ret=ssl3_get_cert_verify(s);
410 if (ret <= 0) goto end;
412 s->state=SSL3_ST_SR_FINISHED_A;
416 case SSL3_ST_SR_FINISHED_A:
417 case SSL3_ST_SR_FINISHED_B:
418 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
419 SSL3_ST_SR_FINISHED_B);
420 if (ret <= 0) goto end;
424 s->state=SSL3_ST_SW_CHANGE_A;
428 case SSL3_ST_SW_CHANGE_A:
429 case SSL3_ST_SW_CHANGE_B:
431 s->session->cipher=s->s3->tmp.new_cipher;
432 if (!s->method->ssl3_enc->setup_key_block(s))
433 { ret= -1; goto end; }
435 ret=ssl3_send_change_cipher_spec(s,
436 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
438 if (ret <= 0) goto end;
439 s->state=SSL3_ST_SW_FINISHED_A;
442 if (!s->method->ssl3_enc->change_cipher_state(s,
443 SSL3_CHANGE_CIPHER_SERVER_WRITE))
451 case SSL3_ST_SW_FINISHED_A:
452 case SSL3_ST_SW_FINISHED_B:
453 ret=ssl3_send_finished(s,
454 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
455 s->method->ssl3_enc->server_finished,
456 s->method->ssl3_enc->server_finished_len);
457 if (ret <= 0) goto end;
458 s->state=SSL3_ST_SW_FLUSH;
460 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
462 s->s3->tmp.next_state=SSL_ST_OK;
467 /* clean a few things up */
468 ssl3_cleanup_key_block(s);
470 BUF_MEM_free(s->init_buf);
473 /* remove buffering on output */
474 ssl_free_wbio_buffer(s);
479 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
481 s->ctx->stats.sess_accept_good++;
483 s->handshake_func=ssl3_accept;
486 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
492 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
498 if (!s->s3->tmp.reuse_message && !skip)
502 if ((ret=BIO_flush(s->wbio)) <= 0)
507 if ((cb != NULL) && (s->state != state))
511 cb(s,SSL_CB_ACCEPT_LOOP,1);
518 /* BIO_flush(s->wbio); */
521 cb(s,SSL_CB_ACCEPT_EXIT,ret);
526 static int ssl3_send_hello_request(s)
531 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
533 p=(unsigned char *)s->init_buf->data;
534 *(p++)=SSL3_MT_CLIENT_REQUEST;
539 s->state=SSL3_ST_SW_HELLO_REQ_B;
540 /* number of bytes to write */
545 /* SSL3_ST_SW_HELLO_REQ_B */
546 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
549 static int ssl3_get_client_hello(s)
552 int i,j,ok,al,ret= -1;
555 unsigned char *p,*d,*q;
560 /* We do this so that we will respond with our native type.
561 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
562 * This down switching should be handled by a different method.
563 * If we are SSLv3, we will respond with SSLv3, even if prompted with
566 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
569 s->state=SSL3_ST_SR_CLNT_HELLO_B;
571 n=ssl3_get_message(s,
572 SSL3_ST_SR_CLNT_HELLO_B,
573 SSL3_ST_SR_CLNT_HELLO_C,
574 SSL3_MT_CLIENT_HELLO,
575 SSL3_RT_MAX_PLAIN_LENGTH,
578 if (!ok) return((int)n);
579 d=p=(unsigned char *)s->init_buf->data;
581 /* The version number has already been checked in ssl3_get_message.
582 * I a native TLSv1/SSLv3 method, the match must be correct except
583 * perhaps for the first message */
584 /* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
587 /* load the client random */
588 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
591 /* get the session-id */
597 if (!ssl_get_new_session(s,1))
602 i=ssl_get_prev_session(s,p,j);
604 { /* previous session */
609 if (!ssl_get_new_session(s,1))
616 if ((i == 0) && (j != 0))
618 /* we need a cipher if we are not resuming a session */
619 al=SSL_AD_ILLEGAL_PARAMETER;
620 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
625 /* not enough data */
626 al=SSL_AD_DECODE_ERROR;
627 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
630 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
637 /* If it is a hit, check that the cipher is in the list */
638 if ((s->hit) && (i > 0))
641 id=s->session->cipher->id;
644 printf("client sent %d ciphers\n",sk_num(ciphers));
646 for (i=0; i<sk_num(ciphers); i++)
648 c=(SSL_CIPHER *)sk_value(ciphers,i);
650 printf("client [%2d of %2d]:%s\n",
651 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
661 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_num(ciphers) == 1))
663 /* Very bad for multi-threading.... */
665 (SSL_CIPHER *)sk_value(ciphers,0);
669 /* we need to have the cipher in the cipher
670 * list if we are asked to reuse it */
671 al=SSL_AD_ILLEGAL_PARAMETER;
672 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
683 if (p[j] == 0) break;
690 al=SSL_AD_DECODE_ERROR;
691 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
695 /* Worst case, we will use the NULL compression, but if we have other
696 * options, we will now look for them. We have i-1 compression
697 * algorithms from the client, starting at q. */
698 s->s3->tmp.new_compression=NULL;
699 if (s->ctx->comp_methods != NULL)
700 { /* See if we have a match */
703 nn=sk_num(s->ctx->comp_methods);
706 comp=(SSL_COMP *)sk_value(s->ctx->comp_methods,m);
719 s->s3->tmp.new_compression=comp;
724 /* TLS does not mind if there is extra stuff */
725 if (s->version == SSL3_VERSION)
729 /* wrong number of bytes,
730 * there could be more to follow */
731 al=SSL_AD_DECODE_ERROR;
732 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
737 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
742 s->session->compress_meth=(comp == NULL)?0:comp->id;
743 if (s->session->ciphers != NULL)
744 sk_free(s->session->ciphers);
745 s->session->ciphers=ciphers;
748 al=SSL_AD_ILLEGAL_PARAMETER;
749 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
753 c=ssl3_choose_cipher(s,s->session->ciphers,
754 ssl_get_ciphers_by_id(s));
758 al=SSL_AD_HANDSHAKE_FAILURE;
759 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
762 s->s3->tmp.new_cipher=c;
766 /* Session-id reuse */
767 #ifdef REUSE_CIPHER_BUG
772 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
774 sk=s->session->ciphers;
775 for (i=0; i<sk_num(sk); i++)
777 c=(SSL_CIPHER *)sk_value(sk,i);
778 if (c->algorithms & SSL_eNULL)
780 if (SSL_C_IS_EXPORT(c))
784 s->s3->tmp.new_cipher=nc;
786 s->s3->tmp.new_cipher=ec;
788 s->s3->tmp.new_cipher=s->session->cipher;
792 s->s3->tmp.new_cipher=s->session->cipher;
795 /* we now have the following setup.
797 * cipher_list - our prefered list of ciphers
798 * ciphers - the clients prefered list of ciphers
799 * compression - basically ignored right now
800 * ssl version is set - sslv3
801 * s->session - The ssl session has been setup.
802 * s->hit - sesson reuse flag
803 * s->tmp.new_cipher - the new cipher to use.
810 ssl3_send_alert(s,SSL3_AL_FATAL,al);
813 if (ciphers != NULL) sk_free(ciphers);
817 static int ssl3_send_server_hello(s)
823 unsigned long l,Time;
825 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
827 buf=(unsigned char *)s->init_buf->data;
828 p=s->s3->server_random;
829 Time=time(NULL); /* Time */
831 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
832 /* Do the message type and length last */
835 *(p++)=s->version>>8;
836 *(p++)=s->version&0xff;
839 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
842 /* now in theory we have 3 options to sending back the
843 * session id. If it is a re-use, we send back the
844 * old session-id, if it is a new session, we send
845 * back the new session-id or we send back a 0 length
846 * session-id if we want it to be single use.
847 * Currently I will not implement the '0' length session-id
848 * 12-Jan-98 - I'll now support the '0' length stuff.
850 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
851 s->session->session_id_length=0;
853 sl=s->session->session_id_length;
855 memcpy(p,s->session->session_id,sl);
859 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
862 /* put the compression method */
863 if (s->s3->tmp.new_compression == NULL)
866 *(p++)=s->s3->tmp.new_compression->id;
871 *(d++)=SSL3_MT_SERVER_HELLO;
874 s->state=SSL3_ST_CW_CLNT_HELLO_B;
875 /* number of bytes to write */
880 /* SSL3_ST_CW_CLNT_HELLO_B */
881 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
884 static int ssl3_send_server_done(s)
889 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
891 p=(unsigned char *)s->init_buf->data;
894 *(p++)=SSL3_MT_SERVER_DONE;
899 s->state=SSL3_ST_SW_SRVR_DONE_B;
900 /* number of bytes to write */
905 /* SSL3_ST_CW_CLNT_HELLO_B */
906 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
909 static int ssl3_send_server_key_exchange(s)
916 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
932 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
934 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
935 cert=s->session->cert;
939 r[0]=r[1]=r[2]=r[3]=NULL;
945 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
947 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
948 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher));
949 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
954 al=SSL_AD_HANDSHAKE_FAILURE;
955 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
960 s->s3->tmp.use_rsa_tmp=1;
968 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
969 dhp=cert->dh_tmp_cb(s,
970 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher));
973 al=SSL_AD_HANDSHAKE_FAILURE;
974 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
977 if ((dh=DHparams_dup(dhp)) == NULL)
979 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
984 if ((dhp->pub_key == NULL ||
985 dhp->priv_key == NULL ||
986 (s->options & SSL_OP_SINGLE_DH_USE)))
988 if(!DH_generate_key(dh))
990 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
997 dh->pub_key=BN_dup(dhp->pub_key);
998 dh->priv_key=BN_dup(dhp->priv_key);
999 if ((dh->pub_key == NULL) ||
1000 (dh->priv_key == NULL))
1002 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1013 al=SSL_AD_HANDSHAKE_FAILURE;
1014 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1017 for (i=0; r[i] != NULL; i++)
1019 nr[i]=BN_num_bytes(r[i]);
1023 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1025 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1028 al=SSL_AD_DECODE_ERROR;
1031 kn=EVP_PKEY_size(pkey);
1039 if (!BUF_MEM_grow(buf,n+4+kn))
1041 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1044 d=(unsigned char *)s->init_buf->data;
1047 for (i=0; r[i] != NULL; i++)
1057 /* n is the length of the params, they start at &(d[4])
1058 * and p points to the space at the end. */
1060 if (pkey->type == EVP_PKEY_RSA)
1064 for (num=2; num > 0; num--)
1066 EVP_DigestInit(&md_ctx,(num == 2)
1067 ?s->ctx->md5:s->ctx->sha1);
1068 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1069 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1070 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1071 EVP_DigestFinal(&md_ctx,q,
1072 (unsigned int *)&i);
1076 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1077 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1080 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1088 #if !defined(NO_DSA)
1089 if (pkey->type == EVP_PKEY_DSA)
1092 EVP_SignInit(&md_ctx,EVP_dss1());
1093 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1094 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1095 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1096 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1097 (unsigned int *)&i,pkey))
1099 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1108 /* Is this error check actually needed? */
1109 al=SSL_AD_HANDSHAKE_FAILURE;
1110 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1115 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1118 /* we should now have things packed up, so lets send
1124 /* SSL3_ST_SW_KEY_EXCH_B */
1125 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1127 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1132 static int ssl3_send_certificate_request(s)
1135 unsigned char *p,*d;
1141 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1145 d=p=(unsigned char *)&(buf->data[4]);
1147 /* get the list of acceptable cert types */
1149 n=ssl3_get_req_cert_type(s,p);
1158 sk=SSL_get_client_CA_list(s);
1162 for (i=0; i<sk_num(sk); i++)
1164 name=(X509_NAME *)sk_value(sk,i);
1165 j=i2d_X509_NAME(name,NULL);
1166 if (!BUF_MEM_grow(buf,4+n+j+2))
1168 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1171 p=(unsigned char *)&(buf->data[4+n]);
1172 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1175 i2d_X509_NAME(name,&p);
1182 i2d_X509_NAME(name,&p);
1183 j-=2; s2n(j,d); j+=2;
1189 /* else no CA names */
1190 p=(unsigned char *)&(buf->data[4+off]);
1193 d=(unsigned char *)buf->data;
1194 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1197 /* we should now have things packed up, so lets send
1204 /* SSL3_ST_SW_CERT_REQ_B */
1205 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1210 static int ssl3_get_client_key_exchange(s)
1218 EVP_PKEY *pkey=NULL;
1224 n=ssl3_get_message(s,
1225 SSL3_ST_SR_KEY_EXCH_A,
1226 SSL3_ST_SR_KEY_EXCH_B,
1227 SSL3_MT_CLIENT_KEY_EXCHANGE,
1231 if (!ok) return((int)n);
1232 p=(unsigned char *)s->init_buf->data;
1234 l=s->s3->tmp.new_cipher->algorithms;
1239 /* FIX THIS UP EAY EAY EAY EAY */
1240 if (s->s3->tmp.use_rsa_tmp)
1242 if ((s->session->cert != NULL) &&
1243 (s->session->cert->rsa_tmp != NULL))
1244 rsa=s->session->cert->rsa_tmp;
1245 else if ((s->ctx->default_cert != NULL) &&
1246 (s->ctx->default_cert->rsa_tmp != NULL))
1247 rsa=s->ctx->default_cert->rsa_tmp;
1248 /* Don't do a callback because rsa_tmp should
1249 * be sent already */
1252 al=SSL_AD_HANDSHAKE_FAILURE;
1253 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1260 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1261 if ( (pkey == NULL) ||
1262 (pkey->type != EVP_PKEY_RSA) ||
1263 (pkey->pkey.rsa == NULL))
1265 al=SSL_AD_HANDSHAKE_FAILURE;
1266 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1273 if (s->version > SSL3_VERSION)
1278 if (!(s->options & SSL_OP_TLS_D5_BUG))
1280 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1290 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1293 /* If a bad decrypt, use a random master key */
1294 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1295 ((p[0] != (s->client_version>>8)) ||
1296 (p[1] != (s->client_version & 0xff))))
1300 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1301 (p[0] == (s->version>>8)) &&
1304 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1309 p[0]=(s->version>>8);
1310 p[1]=(s->version & 0xff);
1311 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1312 i=SSL_MAX_MASTER_KEY_LENGTH;
1314 /* else, an SSLeay bug, ssl only server, tls client */
1317 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1319 al=SSL_AD_DECODE_ERROR;
1320 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1324 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1326 al=SSL_AD_DECODE_ERROR;
1327 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1332 s->session->master_key_length=
1333 s->method->ssl3_enc->generate_master_secret(s,
1334 s->session->master_key,
1341 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1346 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1348 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1358 if (n == 0L) /* the parameters are in the cert */
1360 al=SSL_AD_HANDSHAKE_FAILURE;
1361 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1366 if (s->s3->tmp.dh == NULL)
1368 al=SSL_AD_HANDSHAKE_FAILURE;
1369 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1373 dh_srvr=s->s3->tmp.dh;
1376 pub=BN_bin2bn(p,i,NULL);
1379 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1383 i=DH_compute_key(p,pub,dh_srvr);
1387 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1391 DH_free(s->s3->tmp.dh);
1396 s->session->master_key_length=
1397 s->method->ssl3_enc->generate_master_secret(s,
1398 s->session->master_key,p,i);
1403 al=SSL_AD_HANDSHAKE_FAILURE;
1404 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1410 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1411 #if !defined(NO_DH) || !defined(NO_RSA)
1417 static int ssl3_get_cert_verify(s)
1420 EVP_PKEY *pkey=NULL;
1427 n=ssl3_get_message(s,
1428 SSL3_ST_SR_CERT_VRFY_A,
1429 SSL3_ST_SR_CERT_VRFY_B,
1434 if (!ok) return((int)n);
1436 if (s->session->peer != NULL)
1438 peer=s->session->peer;
1439 pkey=X509_get_pubkey(peer);
1440 type=X509_certificate_type(peer,pkey);
1448 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1450 s->s3->tmp.reuse_message=1;
1451 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1453 al=SSL_AD_UNEXPECTED_MESSAGE;
1454 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1463 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1464 al=SSL_AD_UNEXPECTED_MESSAGE;
1468 if (!(type & EVP_PKT_SIGN))
1470 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1471 al=SSL_AD_ILLEGAL_PARAMETER;
1475 if (s->s3->change_cipher_spec)
1477 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1478 al=SSL_AD_UNEXPECTED_MESSAGE;
1482 /* we now have a signature that we need to verify */
1483 p=(unsigned char *)s->init_buf->data;
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1489 al=SSL_AD_DECODE_ERROR;
1493 j=EVP_PKEY_size(pkey);
1494 if ((i > j) || (n > j) || (n <= 0))
1496 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1497 al=SSL_AD_DECODE_ERROR;
1502 if (pkey->type == EVP_PKEY_RSA)
1504 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1507 al=SSL_AD_DECRYPT_ERROR;
1508 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1511 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1512 memcmp(&(s->s3->tmp.finish_md[0]),p,
1513 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1515 al=SSL_AD_DECRYPT_ERROR;
1516 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1523 if (pkey->type == EVP_PKEY_DSA)
1525 j=DSA_verify(pkey->save_type,
1526 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1527 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1531 al=SSL_AD_DECRYPT_ERROR;
1532 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1539 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1540 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1549 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1552 EVP_PKEY_free(pkey);
1556 static int ssl3_get_client_certificate(s)
1559 int i,ok,al,ret= -1;
1561 unsigned long l,nc,llen,n;
1562 unsigned char *p,*d,*q;
1565 n=ssl3_get_message(s,
1569 #if defined(MSDOS) && !defined(WIN32)
1570 1024*30, /* 30k max cert list :-) */
1572 1024*100, /* 100k max cert list :-) */
1576 if (!ok) return((int)n);
1578 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1580 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1581 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1583 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1584 al=SSL_AD_HANDSHAKE_FAILURE;
1587 /* If tls asked for a client cert we must return a 0 list */
1588 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1590 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1591 al=SSL_AD_UNEXPECTED_MESSAGE;
1594 s->s3->tmp.reuse_message=1;
1598 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1600 al=SSL_AD_UNEXPECTED_MESSAGE;
1601 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1604 d=p=(unsigned char *)s->init_buf->data;
1606 if ((sk=sk_new_null()) == NULL)
1608 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1615 al=SSL_AD_DECODE_ERROR;
1616 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1619 for (nc=0; nc<llen; )
1622 if ((l+nc+3) > llen)
1624 al=SSL_AD_DECODE_ERROR;
1625 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1630 x=d2i_X509(NULL,&p,l);
1633 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1638 al=SSL_AD_DECODE_ERROR;
1639 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1642 if (!sk_push(sk,(char *)x))
1644 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1651 if (sk_num(sk) <= 0)
1653 /* TLS does not mind 0 certs returned */
1654 if (s->version == SSL3_VERSION)
1656 al=SSL_AD_HANDSHAKE_FAILURE;
1657 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1660 /* Fail for TLS only if we required a certificate */
1661 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1662 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1664 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1665 al=SSL_AD_HANDSHAKE_FAILURE;
1671 i=ssl_verify_cert_chain(s,sk);
1674 al=ssl_verify_alarm_type(s->verify_result);
1675 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1680 /* This should not be needed */
1681 if (s->session->peer != NULL)
1682 X509_free(s->session->peer);
1683 s->session->peer=(X509 *)sk_shift(sk);
1689 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1692 if (x != NULL) X509_free(x);
1693 if (sk != NULL) sk_pop_free(sk,X509_free);
1697 int ssl3_send_server_certificate(s)
1703 if (s->state == SSL3_ST_SW_CERT_A)
1705 x=ssl_get_server_send_cert(s);
1708 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1712 l=ssl3_output_cert_chain(s,x);
1713 s->state=SSL3_ST_SW_CERT_B;
1718 /* SSL3_ST_SW_CERT_B */
1719 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));