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);
113 int new_state,state,skip=0;
115 RAND_seed(&Time,sizeof(Time));
119 if (s->info_callback != NULL)
121 else if (s->ctx->info_callback != NULL)
122 cb=s->ctx->info_callback;
124 /* init things to blank */
125 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
130 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
140 case SSL_ST_RENEGOTIATE:
142 /* s->state=SSL_ST_ACCEPT; */
146 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
147 case SSL_ST_OK|SSL_ST_ACCEPT:
150 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
152 if ((s->version>>8) != 3)
154 /* s->version=SSL3_VERSION; */
155 s->type=SSL_ST_ACCEPT;
157 if (s->init_buf == NULL)
159 if ((buf=BUF_MEM_new()) == NULL)
164 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
172 if (!ssl3_setup_buffers(s))
178 /* Ok, we now need to push on a buffering BIO so that
179 * the output is sent in a way that TCP likes :-)
181 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
185 if (s->state != SSL_ST_RENEGOTIATE)
187 s->state=SSL3_ST_SR_CLNT_HELLO_A;
188 ssl3_init_finished_mac(s);
189 s->ctx->stats.sess_accept++;
193 s->ctx->stats.sess_accept_renegotiate++;
194 s->state=SSL3_ST_SW_HELLO_REQ_A;
198 case SSL3_ST_SW_HELLO_REQ_A:
199 case SSL3_ST_SW_HELLO_REQ_B:
202 ret=ssl3_send_hello_request(s);
203 if (ret <= 0) goto end;
204 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
205 s->state=SSL3_ST_SW_FLUSH;
208 ssl3_init_finished_mac(s);
211 case SSL3_ST_SW_HELLO_REQ_C:
217 case SSL3_ST_SR_CLNT_HELLO_A:
218 case SSL3_ST_SR_CLNT_HELLO_B:
219 case SSL3_ST_SR_CLNT_HELLO_C:
222 ret=ssl3_get_client_hello(s);
223 if (ret <= 0) goto end;
224 s->state=SSL3_ST_SW_SRVR_HELLO_A;
228 case SSL3_ST_SW_SRVR_HELLO_A:
229 case SSL3_ST_SW_SRVR_HELLO_B:
230 ret=ssl3_send_server_hello(s);
231 if (ret <= 0) goto end;
234 s->state=SSL3_ST_SW_CHANGE_A;
236 s->state=SSL3_ST_SW_CERT_A;
240 case SSL3_ST_SW_CERT_A:
241 case SSL3_ST_SW_CERT_B:
242 /* Check if it is anon DH */
243 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
245 ret=ssl3_send_server_certificate(s);
246 if (ret <= 0) goto end;
250 s->state=SSL3_ST_SW_KEY_EXCH_A;
254 case SSL3_ST_SW_KEY_EXCH_A:
255 case SSL3_ST_SW_KEY_EXCH_B:
256 l=s->s3->tmp.new_cipher->algorithms;
258 /* clear this, it may get reset by
259 * send_server_key_exchange */
260 if (s->options & SSL_OP_EPHEMERAL_RSA)
261 s->s3->tmp.use_rsa_tmp=1;
263 s->s3->tmp.use_rsa_tmp=0;
265 /* only send if a DH key exchange, fortezza or
266 * RSA but we have a sign only certificate */
267 if (s->s3->tmp.use_rsa_tmp
268 || (l & (SSL_DH|SSL_kFZA))
270 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
272 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
278 ret=ssl3_send_server_key_exchange(s);
279 if (ret <= 0) goto end;
284 s->state=SSL3_ST_SW_CERT_REQ_A;
288 case SSL3_ST_SW_CERT_REQ_A:
289 case SSL3_ST_SW_CERT_REQ_B:
290 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
291 ((s->session->peer != NULL) &&
292 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
294 /* no cert request */
296 s->s3->tmp.cert_request=0;
297 s->state=SSL3_ST_SW_SRVR_DONE_A;
301 s->s3->tmp.cert_request=1;
302 ret=ssl3_send_certificate_request(s);
303 if (ret <= 0) goto end;
304 s->state=SSL3_ST_SW_SRVR_DONE_A;
309 case SSL3_ST_SW_SRVR_DONE_A:
310 case SSL3_ST_SW_SRVR_DONE_B:
311 ret=ssl3_send_server_done(s);
312 if (ret <= 0) goto end;
313 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
314 s->state=SSL3_ST_SW_FLUSH;
318 case SSL3_ST_SW_FLUSH:
319 /* number of bytes to be flushed */
320 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
323 s->rwstate=SSL_WRITING;
324 num1=BIO_flush(s->wbio);
325 if (num1 <= 0) { ret= -1; goto end; }
326 s->rwstate=SSL_NOTHING;
329 s->state=s->s3->tmp.next_state;
332 case SSL3_ST_SR_CERT_A:
333 case SSL3_ST_SR_CERT_B:
334 /* could be sent for a DH cert, even if we
335 * have not asked for it :-) */
336 ret=ssl3_get_client_certificate(s);
337 if (ret <= 0) goto end;
339 s->state=SSL3_ST_SR_KEY_EXCH_A;
342 case SSL3_ST_SR_KEY_EXCH_A:
343 case SSL3_ST_SR_KEY_EXCH_B:
344 ret=ssl3_get_client_key_exchange(s);
345 if (ret <= 0) goto end;
346 s->state=SSL3_ST_SR_CERT_VRFY_A;
349 /* We need to get hashes here so if there is
350 * a client cert, it can be verified */
351 s->method->ssl3_enc->cert_verify_mac(s,
352 &(s->s3->finish_dgst1),
353 &(s->s3->tmp.finish_md[0]));
354 s->method->ssl3_enc->cert_verify_mac(s,
355 &(s->s3->finish_dgst2),
356 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
360 case SSL3_ST_SR_CERT_VRFY_A:
361 case SSL3_ST_SR_CERT_VRFY_B:
363 /* we should decide if we expected this one */
364 ret=ssl3_get_cert_verify(s);
365 if (ret <= 0) goto end;
367 s->state=SSL3_ST_SR_FINISHED_A;
371 case SSL3_ST_SR_FINISHED_A:
372 case SSL3_ST_SR_FINISHED_B:
373 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
374 SSL3_ST_SR_FINISHED_B);
375 if (ret <= 0) goto end;
379 s->state=SSL3_ST_SW_CHANGE_A;
383 case SSL3_ST_SW_CHANGE_A:
384 case SSL3_ST_SW_CHANGE_B:
386 s->session->cipher=s->s3->tmp.new_cipher;
387 if (!s->method->ssl3_enc->setup_key_block(s))
388 { ret= -1; goto end; }
390 ret=ssl3_send_change_cipher_spec(s,
391 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
393 if (ret <= 0) goto end;
394 s->state=SSL3_ST_SW_FINISHED_A;
397 if (!s->method->ssl3_enc->change_cipher_state(s,
398 SSL3_CHANGE_CIPHER_SERVER_WRITE))
406 case SSL3_ST_SW_FINISHED_A:
407 case SSL3_ST_SW_FINISHED_B:
408 ret=ssl3_send_finished(s,
409 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
410 s->method->ssl3_enc->server_finished,
411 s->method->ssl3_enc->server_finished_len);
412 if (ret <= 0) goto end;
413 s->state=SSL3_ST_SW_FLUSH;
415 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
417 s->s3->tmp.next_state=SSL_ST_OK;
422 /* clean a few things up */
423 ssl3_cleanup_key_block(s);
425 BUF_MEM_free(s->init_buf);
428 /* remove buffering on output */
429 ssl_free_wbio_buffer(s);
434 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
436 s->ctx->stats.sess_accept_good++;
438 s->handshake_func=ssl3_accept;
441 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
447 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
453 if (!s->s3->tmp.reuse_message && !skip)
457 if ((ret=BIO_flush(s->wbio)) <= 0)
462 if ((cb != NULL) && (s->state != state))
466 cb(s,SSL_CB_ACCEPT_LOOP,1);
473 /* BIO_flush(s->wbio); */
476 cb(s,SSL_CB_ACCEPT_EXIT,ret);
481 static int ssl3_send_hello_request(SSL *s)
485 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
487 p=(unsigned char *)s->init_buf->data;
488 *(p++)=SSL3_MT_CLIENT_REQUEST;
493 s->state=SSL3_ST_SW_HELLO_REQ_B;
494 /* number of bytes to write */
499 /* SSL3_ST_SW_HELLO_REQ_B */
500 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
503 static int ssl3_get_client_hello(SSL *s)
505 int i,j,ok,al,ret= -1;
508 unsigned char *p,*d,*q;
511 STACK_OF(SSL_CIPHER) *ciphers=NULL;
513 /* We do this so that we will respond with our native type.
514 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
515 * This down switching should be handled by a different method.
516 * If we are SSLv3, we will respond with SSLv3, even if prompted with
519 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
522 s->state=SSL3_ST_SR_CLNT_HELLO_B;
524 n=ssl3_get_message(s,
525 SSL3_ST_SR_CLNT_HELLO_B,
526 SSL3_ST_SR_CLNT_HELLO_C,
527 SSL3_MT_CLIENT_HELLO,
528 SSL3_RT_MAX_PLAIN_LENGTH,
531 if (!ok) return((int)n);
532 d=p=(unsigned char *)s->init_buf->data;
534 /* The version number has already been checked in ssl3_get_message.
535 * I a native TLSv1/SSLv3 method, the match must be correct except
536 * perhaps for the first message */
537 /* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
540 /* load the client random */
541 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
544 /* get the session-id */
550 if (!ssl_get_new_session(s,1))
555 i=ssl_get_prev_session(s,p,j);
557 { /* previous session */
562 if (!ssl_get_new_session(s,1))
569 if ((i == 0) && (j != 0))
571 /* we need a cipher if we are not resuming a session */
572 al=SSL_AD_ILLEGAL_PARAMETER;
573 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
578 /* not enough data */
579 al=SSL_AD_DECODE_ERROR;
580 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
583 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
590 /* If it is a hit, check that the cipher is in the list */
591 if ((s->hit) && (i > 0))
594 id=s->session->cipher->id;
597 printf("client sent %d ciphers\n",sk_num(ciphers));
599 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
601 c=sk_SSL_CIPHER_value(ciphers,i);
603 printf("client [%2d of %2d]:%s\n",
604 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
614 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
616 /* Very bad for multi-threading.... */
617 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
622 /* we need to have the cipher in the cipher
623 * list if we are asked to reuse it */
624 al=SSL_AD_ILLEGAL_PARAMETER;
625 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
636 if (p[j] == 0) break;
643 al=SSL_AD_DECODE_ERROR;
644 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
648 /* Worst case, we will use the NULL compression, but if we have other
649 * options, we will now look for them. We have i-1 compression
650 * algorithms from the client, starting at q. */
651 s->s3->tmp.new_compression=NULL;
652 if (s->ctx->comp_methods != NULL)
653 { /* See if we have a match */
656 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
659 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
672 s->s3->tmp.new_compression=comp;
677 /* TLS does not mind if there is extra stuff */
678 if (s->version == SSL3_VERSION)
682 /* wrong number of bytes,
683 * there could be more to follow */
684 al=SSL_AD_DECODE_ERROR;
685 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
690 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
695 s->session->compress_meth=(comp == NULL)?0:comp->id;
696 if (s->session->ciphers != NULL)
697 sk_SSL_CIPHER_free(s->session->ciphers);
698 s->session->ciphers=ciphers;
701 al=SSL_AD_ILLEGAL_PARAMETER;
702 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
706 c=ssl3_choose_cipher(s,s->session->ciphers,
707 ssl_get_ciphers_by_id(s));
711 al=SSL_AD_HANDSHAKE_FAILURE;
712 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
715 s->s3->tmp.new_cipher=c;
719 /* Session-id reuse */
720 #ifdef REUSE_CIPHER_BUG
721 STACK_OF(SSL_CIPHER) *sk;
725 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
727 sk=s->session->ciphers;
728 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
730 c=sk_SSL_CIPHER_value(sk,i);
731 if (c->algorithms & SSL_eNULL)
733 if (SSL_C_IS_EXPORT(c))
737 s->s3->tmp.new_cipher=nc;
739 s->s3->tmp.new_cipher=ec;
741 s->s3->tmp.new_cipher=s->session->cipher;
745 s->s3->tmp.new_cipher=s->session->cipher;
748 /* we now have the following setup.
750 * cipher_list - our prefered list of ciphers
751 * ciphers - the clients prefered list of ciphers
752 * compression - basically ignored right now
753 * ssl version is set - sslv3
754 * s->session - The ssl session has been setup.
755 * s->hit - sesson reuse flag
756 * s->tmp.new_cipher - the new cipher to use.
763 ssl3_send_alert(s,SSL3_AL_FATAL,al);
766 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
770 static int ssl3_send_server_hello(SSL *s)
775 unsigned long l,Time;
777 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
779 buf=(unsigned char *)s->init_buf->data;
780 p=s->s3->server_random;
781 Time=time(NULL); /* Time */
783 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
784 /* Do the message type and length last */
787 *(p++)=s->version>>8;
788 *(p++)=s->version&0xff;
791 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
794 /* now in theory we have 3 options to sending back the
795 * session id. If it is a re-use, we send back the
796 * old session-id, if it is a new session, we send
797 * back the new session-id or we send back a 0 length
798 * session-id if we want it to be single use.
799 * Currently I will not implement the '0' length session-id
800 * 12-Jan-98 - I'll now support the '0' length stuff.
802 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
803 s->session->session_id_length=0;
805 sl=s->session->session_id_length;
807 memcpy(p,s->session->session_id,sl);
811 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
814 /* put the compression method */
815 if (s->s3->tmp.new_compression == NULL)
818 *(p++)=s->s3->tmp.new_compression->id;
823 *(d++)=SSL3_MT_SERVER_HELLO;
826 s->state=SSL3_ST_CW_CLNT_HELLO_B;
827 /* number of bytes to write */
832 /* SSL3_ST_CW_CLNT_HELLO_B */
833 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
836 static int ssl3_send_server_done(SSL *s)
840 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
842 p=(unsigned char *)s->init_buf->data;
845 *(p++)=SSL3_MT_SERVER_DONE;
850 s->state=SSL3_ST_SW_SRVR_DONE_B;
851 /* number of bytes to write */
856 /* SSL3_ST_CW_CLNT_HELLO_B */
857 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
860 static int ssl3_send_server_key_exchange(SSL *s)
866 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
882 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
884 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
889 r[0]=r[1]=r[2]=r[3]=NULL;
895 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
897 rsa=s->cert->rsa_tmp_cb(s,
898 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
899 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
900 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
905 al=SSL_AD_HANDSHAKE_FAILURE;
906 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
911 s->s3->tmp.use_rsa_tmp=1;
919 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
920 dhp=s->cert->dh_tmp_cb(s,
921 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
922 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
925 al=SSL_AD_HANDSHAKE_FAILURE;
926 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
929 if ((dh=DHparams_dup(dhp)) == NULL)
931 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
936 if ((dhp->pub_key == NULL ||
937 dhp->priv_key == NULL ||
938 (s->options & SSL_OP_SINGLE_DH_USE)))
940 if(!DH_generate_key(dh))
942 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
949 dh->pub_key=BN_dup(dhp->pub_key);
950 dh->priv_key=BN_dup(dhp->priv_key);
951 if ((dh->pub_key == NULL) ||
952 (dh->priv_key == NULL))
954 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
965 al=SSL_AD_HANDSHAKE_FAILURE;
966 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
969 for (i=0; r[i] != NULL; i++)
971 nr[i]=BN_num_bytes(r[i]);
975 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
977 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
980 al=SSL_AD_DECODE_ERROR;
983 kn=EVP_PKEY_size(pkey);
991 if (!BUF_MEM_grow(buf,n+4+kn))
993 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
996 d=(unsigned char *)s->init_buf->data;
999 for (i=0; r[i] != NULL; i++)
1009 /* n is the length of the params, they start at &(d[4])
1010 * and p points to the space at the end. */
1012 if (pkey->type == EVP_PKEY_RSA)
1016 for (num=2; num > 0; num--)
1018 EVP_DigestInit(&md_ctx,(num == 2)
1019 ?s->ctx->md5:s->ctx->sha1);
1020 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1021 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1022 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1023 EVP_DigestFinal(&md_ctx,q,
1024 (unsigned int *)&i);
1028 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1029 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1032 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1040 #if !defined(NO_DSA)
1041 if (pkey->type == EVP_PKEY_DSA)
1044 EVP_SignInit(&md_ctx,EVP_dss1());
1045 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1046 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1047 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1048 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1049 (unsigned int *)&i,pkey))
1051 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1060 /* Is this error check actually needed? */
1061 al=SSL_AD_HANDSHAKE_FAILURE;
1062 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1067 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1070 /* we should now have things packed up, so lets send
1076 /* SSL3_ST_SW_KEY_EXCH_B */
1077 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1079 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1084 static int ssl3_send_certificate_request(SSL *s)
1086 unsigned char *p,*d;
1088 STACK_OF(X509_NAME) *sk=NULL;
1092 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1096 d=p=(unsigned char *)&(buf->data[4]);
1098 /* get the list of acceptable cert types */
1100 n=ssl3_get_req_cert_type(s,p);
1109 sk=SSL_get_client_CA_list(s);
1113 for (i=0; i<sk_X509_NAME_num(sk); i++)
1115 name=sk_X509_NAME_value(sk,i);
1116 j=i2d_X509_NAME(name,NULL);
1117 if (!BUF_MEM_grow(buf,4+n+j+2))
1119 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1122 p=(unsigned char *)&(buf->data[4+n]);
1123 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1126 i2d_X509_NAME(name,&p);
1133 i2d_X509_NAME(name,&p);
1134 j-=2; s2n(j,d); j+=2;
1140 /* else no CA names */
1141 p=(unsigned char *)&(buf->data[4+off]);
1144 d=(unsigned char *)buf->data;
1145 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1148 /* we should now have things packed up, so lets send
1155 /* SSL3_ST_SW_CERT_REQ_B */
1156 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1161 static int ssl3_get_client_key_exchange(SSL *s)
1169 EVP_PKEY *pkey=NULL;
1176 n=ssl3_get_message(s,
1177 SSL3_ST_SR_KEY_EXCH_A,
1178 SSL3_ST_SR_KEY_EXCH_B,
1179 SSL3_MT_CLIENT_KEY_EXCHANGE,
1183 if (!ok) return((int)n);
1184 p=(unsigned char *)s->init_buf->data;
1186 l=s->s3->tmp.new_cipher->algorithms;
1191 /* FIX THIS UP EAY EAY EAY EAY */
1192 if (s->s3->tmp.use_rsa_tmp)
1194 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1195 rsa=s->cert->rsa_tmp;
1196 /* Don't do a callback because rsa_tmp should
1197 * be sent already */
1200 al=SSL_AD_HANDSHAKE_FAILURE;
1201 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1208 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1209 if ( (pkey == NULL) ||
1210 (pkey->type != EVP_PKEY_RSA) ||
1211 (pkey->pkey.rsa == NULL))
1213 al=SSL_AD_HANDSHAKE_FAILURE;
1214 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1221 if (s->version > SSL3_VERSION)
1226 if (!(s->options & SSL_OP_TLS_D5_BUG))
1228 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1238 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1241 /* If a bad decrypt, use a random master key */
1242 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1243 ((p[0] != (s->client_version>>8)) ||
1244 (p[1] != (s->client_version & 0xff))))
1248 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1249 (p[0] == (s->version>>8)) &&
1252 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1257 p[0]=(s->version>>8);
1258 p[1]=(s->version & 0xff);
1259 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1260 i=SSL_MAX_MASTER_KEY_LENGTH;
1262 /* else, an SSLeay bug, ssl only server, tls client */
1265 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1267 al=SSL_AD_DECODE_ERROR;
1268 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1272 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1274 al=SSL_AD_DECODE_ERROR;
1275 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1280 s->session->master_key_length=
1281 s->method->ssl3_enc->generate_master_secret(s,
1282 s->session->master_key,
1289 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1294 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1296 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1306 if (n == 0L) /* the parameters are in the cert */
1308 al=SSL_AD_HANDSHAKE_FAILURE;
1309 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1314 if (s->s3->tmp.dh == NULL)
1316 al=SSL_AD_HANDSHAKE_FAILURE;
1317 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1321 dh_srvr=s->s3->tmp.dh;
1324 pub=BN_bin2bn(p,i,NULL);
1327 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1331 i=DH_compute_key(p,pub,dh_srvr);
1335 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1339 DH_free(s->s3->tmp.dh);
1344 s->session->master_key_length=
1345 s->method->ssl3_enc->generate_master_secret(s,
1346 s->session->master_key,p,i);
1351 al=SSL_AD_HANDSHAKE_FAILURE;
1352 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1358 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1359 #if !defined(NO_DH) || !defined(NO_RSA)
1365 static int ssl3_get_cert_verify(SSL *s)
1367 EVP_PKEY *pkey=NULL;
1374 n=ssl3_get_message(s,
1375 SSL3_ST_SR_CERT_VRFY_A,
1376 SSL3_ST_SR_CERT_VRFY_B,
1381 if (!ok) return((int)n);
1383 if (s->session->peer != NULL)
1385 peer=s->session->peer;
1386 pkey=X509_get_pubkey(peer);
1387 type=X509_certificate_type(peer,pkey);
1395 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1397 s->s3->tmp.reuse_message=1;
1398 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1400 al=SSL_AD_UNEXPECTED_MESSAGE;
1401 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1410 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1411 al=SSL_AD_UNEXPECTED_MESSAGE;
1415 if (!(type & EVP_PKT_SIGN))
1417 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1418 al=SSL_AD_ILLEGAL_PARAMETER;
1422 if (s->s3->change_cipher_spec)
1424 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1425 al=SSL_AD_UNEXPECTED_MESSAGE;
1429 /* we now have a signature that we need to verify */
1430 p=(unsigned char *)s->init_buf->data;
1435 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1436 al=SSL_AD_DECODE_ERROR;
1440 j=EVP_PKEY_size(pkey);
1441 if ((i > j) || (n > j) || (n <= 0))
1443 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1444 al=SSL_AD_DECODE_ERROR;
1449 if (pkey->type == EVP_PKEY_RSA)
1451 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1454 al=SSL_AD_DECRYPT_ERROR;
1455 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1458 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1459 memcmp(&(s->s3->tmp.finish_md[0]),p,
1460 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1462 al=SSL_AD_DECRYPT_ERROR;
1463 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1470 if (pkey->type == EVP_PKEY_DSA)
1472 j=DSA_verify(pkey->save_type,
1473 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1474 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1478 al=SSL_AD_DECRYPT_ERROR;
1479 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1486 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1487 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1496 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1499 EVP_PKEY_free(pkey);
1503 static int ssl3_get_client_certificate(SSL *s)
1505 int i,ok,al,ret= -1;
1507 unsigned long l,nc,llen,n;
1508 unsigned char *p,*d,*q;
1509 STACK_OF(X509) *sk=NULL;
1511 n=ssl3_get_message(s,
1515 #if defined(MSDOS) && !defined(WIN32)
1516 1024*30, /* 30k max cert list :-) */
1518 1024*100, /* 100k max cert list :-) */
1522 if (!ok) return((int)n);
1524 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1526 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1527 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1529 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1530 al=SSL_AD_HANDSHAKE_FAILURE;
1533 /* If tls asked for a client cert we must return a 0 list */
1534 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1536 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1537 al=SSL_AD_UNEXPECTED_MESSAGE;
1540 s->s3->tmp.reuse_message=1;
1544 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1546 al=SSL_AD_UNEXPECTED_MESSAGE;
1547 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1550 d=p=(unsigned char *)s->init_buf->data;
1552 if ((sk=sk_X509_new_null()) == NULL)
1554 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1561 al=SSL_AD_DECODE_ERROR;
1562 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1565 for (nc=0; nc<llen; )
1568 if ((l+nc+3) > llen)
1570 al=SSL_AD_DECODE_ERROR;
1571 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1576 x=d2i_X509(NULL,&p,l);
1579 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1584 al=SSL_AD_DECODE_ERROR;
1585 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1588 if (!sk_X509_push(sk,x))
1590 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1597 if (sk_X509_num(sk) <= 0)
1599 /* TLS does not mind 0 certs returned */
1600 if (s->version == SSL3_VERSION)
1602 al=SSL_AD_HANDSHAKE_FAILURE;
1603 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1606 /* Fail for TLS only if we required a certificate */
1607 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1608 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1610 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1611 al=SSL_AD_HANDSHAKE_FAILURE;
1617 i=ssl_verify_cert_chain(s,sk);
1620 al=ssl_verify_alarm_type(s->verify_result);
1621 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1626 if (s->session->peer != NULL) /* This should not be needed */
1627 X509_free(s->session->peer);
1628 s->session->peer=sk_X509_shift(sk);
1630 /* With the current implementation, sess_cert will always be NULL
1631 * when we arrive here. */
1632 if (s->session->sess_cert == NULL)
1634 s->session->sess_cert = ssl_sess_cert_new();
1635 if (s->session->sess_cert == NULL)
1637 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1641 if (s->session->sess_cert->cert_chain != NULL)
1642 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1643 s->session->sess_cert->cert_chain=sk;
1651 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1654 if (x != NULL) X509_free(x);
1655 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1659 int ssl3_send_server_certificate(SSL *s)
1664 if (s->state == SSL3_ST_SW_CERT_A)
1666 x=ssl_get_server_send_cert(s);
1669 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1673 l=ssl3_output_cert_chain(s,x);
1674 s->state=SSL3_ST_SW_CERT_B;
1679 /* SSL3_ST_SW_CERT_B */
1680 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));