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 int ssl3_get_client_hello(SSL *s);
79 static int ssl3_send_server_hello(SSL *s);
80 static int ssl3_send_server_key_exchange(SSL *s);
81 static int ssl3_send_certificate_request(SSL *s);
82 static int ssl3_send_server_done(SSL *s);
83 static int ssl3_get_cert_verify(SSL *s);
84 static int ssl3_get_client_key_exchange(SSL *s);
85 static int ssl3_get_client_certificate(SSL *s);
86 static int ssl3_send_hello_request(SSL *s);
90 static int ssl3_get_client_hello();
91 static int ssl3_send_server_hello();
92 static int ssl3_send_server_key_exchange();
93 static int ssl3_send_certificate_request();
94 static int ssl3_send_server_done();
95 static int ssl3_get_cert_verify();
96 static int ssl3_get_client_key_exchange();
97 static int ssl3_get_client_certificate();
98 static int ssl3_send_hello_request();
102 static SSL_METHOD *ssl3_get_server_method(ver)
105 if (ver == SSL3_VERSION)
106 return(SSLv3_server_method());
111 SSL_METHOD *SSLv3_server_method()
114 static SSL_METHOD SSLv3_server_data;
119 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
121 SSLv3_server_data.ssl_accept=ssl3_accept;
122 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
124 return(&SSLv3_server_data);
131 unsigned long l,Time=time(NULL);
137 int new_state,state,skip=0;
139 RAND_seed((unsigned char *)&Time,sizeof(Time));
143 if (s->info_callback != NULL)
145 else if (s->ctx->info_callback != NULL)
146 cb=s->ctx->info_callback;
148 /* init things to blank */
149 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
153 /* FIX THIS EAY EAY EAY */
154 /* we don't actually need a cert, we just need a cert or a DH_tmp */
155 if (((s->session == NULL) || (s->session->cert == NULL)) &&
158 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
170 case SSL_ST_RENEGOTIATE:
172 /* s->state=SSL_ST_ACCEPT; */
176 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
177 case SSL_ST_OK|SSL_ST_ACCEPT:
179 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
181 if ((s->version>>8) != 3)
183 /* s->version=SSL3_VERSION; */
184 s->type=SSL_ST_ACCEPT;
186 if (s->init_buf == NULL)
188 if ((buf=BUF_MEM_new()) == NULL)
193 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
201 if (!ssl3_setup_buffers(s))
207 /* Ok, we now need to push on a buffering BIO so that
208 * the output is sent in a way that TCP likes :-)
210 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
214 if (s->state != SSL_ST_RENEGOTIATE)
216 s->state=SSL3_ST_SR_CLNT_HELLO_A;
217 ssl3_init_finished_mac(s);
218 s->ctx->sess_accept++;
222 s->ctx->sess_accept_renegotiate++;
223 s->state=SSL3_ST_SW_HELLO_REQ_A;
227 case SSL3_ST_SW_HELLO_REQ_A:
228 case SSL3_ST_SW_HELLO_REQ_B:
231 ret=ssl3_send_hello_request(s);
232 if (ret <= 0) goto end;
233 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
234 s->state=SSL3_ST_SW_FLUSH;
237 ssl3_init_finished_mac(s);
240 case SSL3_ST_SW_HELLO_REQ_C:
241 /* remove buffering on output */
242 under=BIO_pop(s->wbio);
255 case SSL3_ST_SR_CLNT_HELLO_A:
256 case SSL3_ST_SR_CLNT_HELLO_B:
257 case SSL3_ST_SR_CLNT_HELLO_C:
260 ret=ssl3_get_client_hello(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_SW_SRVR_HELLO_A;
266 case SSL3_ST_SW_SRVR_HELLO_A:
267 case SSL3_ST_SW_SRVR_HELLO_B:
268 ret=ssl3_send_server_hello(s);
269 if (ret <= 0) goto end;
272 s->state=SSL3_ST_SW_CHANGE_A;
274 s->state=SSL3_ST_SW_CERT_A;
278 case SSL3_ST_SW_CERT_A:
279 case SSL3_ST_SW_CERT_B:
280 /* Check if it is anon DH */
281 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
283 ret=ssl3_send_server_certificate(s);
284 if (ret <= 0) goto end;
288 s->state=SSL3_ST_SW_KEY_EXCH_A;
292 case SSL3_ST_SW_KEY_EXCH_A:
293 case SSL3_ST_SW_KEY_EXCH_B:
294 l=s->s3->tmp.new_cipher->algorithms;
295 if (s->session->cert == NULL)
299 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
300 s->session->cert=s->cert;
304 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
305 s->session->cert=s->ctx->default_cert;
310 /* clear this, it may get reset by
311 * send_server_key_exchange */
312 if (s->options & SSL_OP_EPHEMERAL_RSA)
313 s->s3->tmp.use_rsa_tmp=1;
315 s->s3->tmp.use_rsa_tmp=0;
317 /* only send if a DH key exchange, fortezza or
318 * RSA but we have a sign only certificate */
319 if ( s->s3->tmp.use_rsa_tmp ||
320 (l & (SSL_DH|SSL_kFZA)) ||
322 ((ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)||
324 (EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > 512)
330 ret=ssl3_send_server_key_exchange(s);
331 if (ret <= 0) goto end;
336 s->state=SSL3_ST_SW_CERT_REQ_A;
340 case SSL3_ST_SW_CERT_REQ_A:
341 case SSL3_ST_SW_CERT_REQ_B:
342 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
343 ((s->session->peer != NULL) &&
344 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
346 /* no cert request */
348 s->s3->tmp.cert_request=0;
349 s->state=SSL3_ST_SW_SRVR_DONE_A;
353 s->s3->tmp.cert_request=1;
354 ret=ssl3_send_certificate_request(s);
355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_SW_SRVR_DONE_A;
361 case SSL3_ST_SW_SRVR_DONE_A:
362 case SSL3_ST_SW_SRVR_DONE_B:
363 ret=ssl3_send_server_done(s);
364 if (ret <= 0) goto end;
365 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
366 s->state=SSL3_ST_SW_FLUSH;
370 case SSL3_ST_SW_FLUSH:
371 /* number of bytes to be flushed */
372 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
375 s->rwstate=SSL_WRITING;
376 num1=BIO_flush(s->wbio);
377 if (num1 <= 0) { ret= -1; goto end; }
378 s->rwstate=SSL_NOTHING;
381 s->state=s->s3->tmp.next_state;
384 case SSL3_ST_SR_CERT_A:
385 case SSL3_ST_SR_CERT_B:
386 /* could be sent for a DH cert, even if we
387 * have not asked for it :-) */
388 ret=ssl3_get_client_certificate(s);
389 if (ret <= 0) goto end;
391 s->state=SSL3_ST_SR_KEY_EXCH_A;
394 case SSL3_ST_SR_KEY_EXCH_A:
395 case SSL3_ST_SR_KEY_EXCH_B:
396 ret=ssl3_get_client_key_exchange(s);
397 if (ret <= 0) goto end;
398 s->state=SSL3_ST_SR_CERT_VRFY_A;
401 /* We need to get hashes here so if there is
402 * a client cert, it can be verified */
403 s->method->ssl3_enc->cert_verify_mac(s,
404 &(s->s3->finish_dgst1),
405 &(s->s3->tmp.finish_md[0]));
406 s->method->ssl3_enc->cert_verify_mac(s,
407 &(s->s3->finish_dgst2),
408 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
412 case SSL3_ST_SR_CERT_VRFY_A:
413 case SSL3_ST_SR_CERT_VRFY_B:
415 /* we should decide if we expected this one */
416 ret=ssl3_get_cert_verify(s);
417 if (ret <= 0) goto end;
419 s->state=SSL3_ST_SR_FINISHED_A;
423 case SSL3_ST_SR_FINISHED_A:
424 case SSL3_ST_SR_FINISHED_B:
425 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
426 SSL3_ST_SR_FINISHED_B);
427 if (ret <= 0) goto end;
431 s->state=SSL3_ST_SW_CHANGE_A;
435 case SSL3_ST_SW_CHANGE_A:
436 case SSL3_ST_SW_CHANGE_B:
438 s->session->cipher=s->s3->tmp.new_cipher;
439 if (!s->method->ssl3_enc->setup_key_block(s))
440 { ret= -1; goto end; }
442 ret=ssl3_send_change_cipher_spec(s,
443 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
445 if (ret <= 0) goto end;
446 s->state=SSL3_ST_SW_FINISHED_A;
449 if (!s->method->ssl3_enc->change_cipher_state(s,
450 SSL3_CHANGE_CIPHER_SERVER_WRITE))
458 case SSL3_ST_SW_FINISHED_A:
459 case SSL3_ST_SW_FINISHED_B:
460 ret=ssl3_send_finished(s,
461 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
462 s->method->ssl3_enc->server_finished,
463 s->method->ssl3_enc->server_finished_len);
464 if (ret <= 0) goto end;
465 s->state=SSL3_ST_SW_FLUSH;
467 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
469 s->s3->tmp.next_state=SSL_ST_OK;
474 /* clean a few things up */
475 ssl3_cleanup_key_block(s);
477 BUF_MEM_free(s->init_buf);
480 /* remove buffering on output */
481 under=BIO_pop(s->wbio);
492 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
494 s->ctx->sess_accept_good++;
496 s->handshake_func=ssl3_accept;
499 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
505 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
511 if (!s->s3->tmp.reuse_message && !skip)
515 if ((ret=BIO_flush(s->wbio)) <= 0)
520 if ((cb != NULL) && (s->state != state))
524 cb(s,SSL_CB_ACCEPT_LOOP,1);
531 /* BIO_flush(s->wbio); */
534 cb(s,SSL_CB_ACCEPT_EXIT,ret);
539 static int ssl3_send_hello_request(s)
544 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
546 p=(unsigned char *)s->init_buf->data;
547 *(p++)=SSL3_MT_CLIENT_REQUEST;
552 s->state=SSL3_ST_SW_HELLO_REQ_B;
553 /* number of bytes to write */
558 /* SSL3_ST_SW_HELLO_REQ_B */
559 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
562 static int ssl3_get_client_hello(s)
565 int i,j,ok,al,ret= -1;
572 /* We do this so that we will respond with our native type.
573 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
574 * This down switching should be handled by a different method.
575 * If we are SSLv3, we will respond with SSLv3, even if prompted with
578 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
581 s->state=SSL3_ST_SR_CLNT_HELLO_B;
583 n=ssl3_get_message(s,
584 SSL3_ST_SR_CLNT_HELLO_B,
585 SSL3_ST_SR_CLNT_HELLO_C,
586 SSL3_MT_CLIENT_HELLO,
587 SSL3_RT_MAX_PLAIN_LENGTH,
590 if (!ok) return((int)n);
591 d=p=(unsigned char *)s->init_buf->data;
593 /* The version number has already been checked in ssl3_get_message.
594 * I a native TLSv1/SSLv3 method, the match must be correct except
595 * perhaps for the first message */
598 /* load the client random */
599 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
602 /* get the session-id */
608 if (!ssl_get_new_session(s,1))
613 i=ssl_get_prev_session(s,p,j);
615 { /* previous session */
620 if (!ssl_get_new_session(s,1))
627 if ((i == 0) && (j != 0))
629 /* we need a cipher if we are not resuming a session */
630 al=SSL_AD_ILLEGAL_PARAMETER;
631 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
636 /* not enough data */
637 al=SSL_AD_DECODE_ERROR;
638 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
641 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
648 /* If it is a hit, check that the cipher is in the list */
649 if ((s->hit) && (i > 0))
652 id=s->session->cipher->id;
654 for (i=0; i<sk_num(ciphers); i++)
656 c=(SSL_CIPHER *)sk_value(ciphers,i);
665 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_num(ciphers) == 1))
667 /* Very bad for multi-threading.... */
669 (SSL_CIPHER *)sk_value(ciphers,0);
673 /* we need to have the cipher in the cipher
674 * list if we are asked to reuse it */
675 al=SSL_AD_ILLEGAL_PARAMETER;
676 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
685 if (p[j] == 0) break;
691 al=SSL_AD_DECODE_ERROR;
692 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
696 /* TLS does not mind if there is extra stuff */
697 if (s->version == SSL3_VERSION)
701 /* wrong number of bytes,
702 * there could be more to follow */
703 al=SSL_AD_DECODE_ERROR;
704 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
709 /* do nothing with compression */
711 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
716 if (s->session->ciphers != NULL)
717 sk_free(s->session->ciphers);
718 s->session->ciphers=ciphers;
721 al=SSL_AD_ILLEGAL_PARAMETER;
722 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
726 c=ssl3_choose_cipher(s,s->session->ciphers,
727 ssl_get_ciphers_by_id(s));
731 al=SSL_AD_HANDSHAKE_FAILURE;
732 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
735 s->s3->tmp.new_cipher=c;
739 /* Session-id reuse */
740 #ifdef REUSE_CIPHER_BUG
745 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
747 sk=s->session->ciphers;
748 for (i=0; i<sk_num(sk); i++)
750 c=(SSL_CIPHER *)sk_value(sk,i);
751 if (c->algorithms & SSL_eNULL)
753 if (c->algorithms & SSL_EXP)
757 s->s3->tmp.new_cipher=nc;
759 s->s3->tmp.new_cipher=ec;
761 s->s3->tmp.new_cipher=s->session->cipher;
765 s->s3->tmp.new_cipher=s->session->cipher;
768 /* we now have the following setup.
770 * cipher_list - our prefered list of ciphers
771 * ciphers - the clients prefered list of ciphers
772 * compression - basically ignored right now
773 * ssl version is set - sslv3
774 * s->session - The ssl session has been setup.
775 * s->hit - sesson reuse flag
776 * s->tmp.new_cipher - the new cipher to use.
783 ssl3_send_alert(s,SSL3_AL_FATAL,al);
786 if (ciphers != NULL) sk_free(ciphers);
790 static int ssl3_send_server_hello(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 */
841 *(d++)=SSL3_MT_SERVER_HELLO;
844 s->state=SSL3_ST_CW_CLNT_HELLO_B;
845 /* number of bytes to write */
850 /* SSL3_ST_CW_CLNT_HELLO_B */
851 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
854 static int ssl3_send_server_done(s)
859 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
861 p=(unsigned char *)s->init_buf->data;
864 *(p++)=SSL3_MT_SERVER_DONE;
869 s->state=SSL3_ST_SW_SRVR_DONE_B;
870 /* number of bytes to write */
875 /* SSL3_ST_CW_CLNT_HELLO_B */
876 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
879 static int ssl3_send_server_key_exchange(s)
886 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
902 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
904 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
905 cert=s->session->cert;
909 r[0]=r[1]=r[2]=r[3]=NULL;
915 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
917 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
918 (s->s3->tmp.new_cipher->algorithms|
920 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
925 al=SSL_AD_HANDSHAKE_FAILURE;
926 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
931 s->s3->tmp.use_rsa_tmp=1;
939 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
940 dhp=cert->dh_tmp_cb(s,
941 (s->s3->tmp.new_cipher->algorithms|
945 al=SSL_AD_HANDSHAKE_FAILURE;
946 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
949 if ((dh=DHparams_dup(dhp)) == NULL)
951 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
956 if (((dhp->pub_key == NULL) ||
957 (dhp->priv_key == NULL) ||
958 (s->options & SSL_OP_SINGLE_DH_USE)) &&
959 (!DH_generate_key(dh)))
961 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
966 dh->pub_key=BN_dup(dhp->pub_key);
967 dh->priv_key=BN_dup(dhp->priv_key);
968 if ((dh->pub_key == NULL) ||
969 (dh->priv_key == NULL))
971 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
982 al=SSL_AD_HANDSHAKE_FAILURE;
983 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
986 for (i=0; r[i] != NULL; i++)
988 nr[i]=BN_num_bytes(r[i]);
992 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
994 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
997 al=SSL_AD_DECODE_ERROR;
1000 kn=EVP_PKEY_size(pkey);
1008 if (!BUF_MEM_grow(buf,n+4+kn))
1010 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1013 d=(unsigned char *)s->init_buf->data;
1016 for (i=0; r[i] != NULL; i++)
1026 /* n is the length of the params, they start at &(d[4])
1027 * and p points to the space at the end. */
1029 if (pkey->type == EVP_PKEY_RSA)
1033 for (num=2; num > 0; num--)
1035 EVP_DigestInit(&md_ctx,(num == 2)
1036 ?s->ctx->md5:s->ctx->sha1);
1037 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1038 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1039 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1040 EVP_DigestFinal(&md_ctx,q,
1041 (unsigned int *)&i);
1045 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1046 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1049 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1057 #if !defined(NO_DSA)
1058 if (pkey->type == EVP_PKEY_DSA)
1061 EVP_SignInit(&md_ctx,EVP_dss1());
1062 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1064 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1065 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1066 (unsigned int *)&i,pkey))
1068 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1077 /* Is this error check actually needed? */
1078 al=SSL_AD_HANDSHAKE_FAILURE;
1079 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1084 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1087 /* we should now have things packed up, so lets send
1093 /* SSL3_ST_SW_KEY_EXCH_B */
1094 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1096 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1101 static int ssl3_send_certificate_request(s)
1104 unsigned char *p,*d;
1110 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1114 d=p=(unsigned char *)&(buf->data[4]);
1116 /* get the list of acceptable cert types */
1118 n=ssl3_get_req_cert_type(s,p);
1127 sk=SSL_get_client_CA_list(s);
1131 for (i=0; i<sk_num(sk); i++)
1133 name=(X509_NAME *)sk_value(sk,i);
1134 j=i2d_X509_NAME(name,NULL);
1135 if (!BUF_MEM_grow(buf,4+n+j+2))
1137 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1140 p=(unsigned char *)&(buf->data[4+n]);
1141 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1144 i2d_X509_NAME(name,&p);
1151 i2d_X509_NAME(name,&p);
1152 j-=2; s2n(j,d); j+=2;
1158 /* else no CA names */
1159 p=(unsigned char *)&(buf->data[4+off]);
1162 d=(unsigned char *)buf->data;
1163 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1166 /* we should now have things packed up, so lets send
1173 /* SSL3_ST_SW_CERT_REQ_B */
1174 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1179 static int ssl3_get_client_key_exchange(s)
1187 EVP_PKEY *pkey=NULL;
1193 n=ssl3_get_message(s,
1194 SSL3_ST_SR_KEY_EXCH_A,
1195 SSL3_ST_SR_KEY_EXCH_B,
1196 SSL3_MT_CLIENT_KEY_EXCHANGE,
1200 if (!ok) return((int)n);
1201 p=(unsigned char *)s->init_buf->data;
1203 l=s->s3->tmp.new_cipher->algorithms;
1208 /* FIX THIS UP EAY EAY EAY EAY */
1209 if (s->s3->tmp.use_rsa_tmp)
1211 if ((s->session->cert != NULL) &&
1212 (s->session->cert->rsa_tmp != NULL))
1213 rsa=s->session->cert->rsa_tmp;
1214 else if ((s->ctx->default_cert != NULL) &&
1215 (s->ctx->default_cert->rsa_tmp != NULL))
1216 rsa=s->ctx->default_cert->rsa_tmp;
1217 /* Don't do a callback because rsa_tmp should
1218 * be sent already */
1221 al=SSL_AD_HANDSHAKE_FAILURE;
1222 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1229 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1230 if ( (pkey == NULL) ||
1231 (pkey->type != EVP_PKEY_RSA) ||
1232 (pkey->pkey.rsa == NULL))
1234 al=SSL_AD_HANDSHAKE_FAILURE;
1235 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1242 if (s->version > SSL3_VERSION)
1247 if (!(s->options & SSL_OP_TLS_D5_BUG))
1249 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1259 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1262 /* If a bad decrypt, use a dud master key */
1263 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1264 ((p[0] != (s->version>>8)) ||
1265 (p[1] != (s->version & 0xff))))
1267 p[0]=(s->version>>8);
1268 p[1]=(s->version & 0xff);
1269 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1270 i=SSL_MAX_MASTER_KEY_LENGTH;
1273 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1275 al=SSL_AD_DECODE_ERROR;
1276 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1280 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1282 al=SSL_AD_DECODE_ERROR;
1283 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1288 s->session->master_key_length=
1289 s->method->ssl3_enc->generate_master_secret(s,
1290 s->session->master_key,
1297 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1302 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1304 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1314 if (n == 0L) /* the parameters are in the cert */
1316 al=SSL_AD_HANDSHAKE_FAILURE;
1317 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1322 if (s->s3->tmp.dh == NULL)
1324 al=SSL_AD_HANDSHAKE_FAILURE;
1325 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1329 dh_srvr=s->s3->tmp.dh;
1332 pub=BN_bin2bn(p,i,NULL);
1335 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1339 i=DH_compute_key(p,pub,dh_srvr);
1343 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1347 DH_free(s->s3->tmp.dh);
1352 s->session->master_key_length=
1353 s->method->ssl3_enc->generate_master_secret(s,
1354 s->session->master_key,p,i);
1359 al=SSL_AD_HANDSHAKE_FAILURE;
1360 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1366 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1367 #if !defined(NO_DH) || !defined(NO_RSA)
1373 static int ssl3_get_cert_verify(s)
1376 EVP_PKEY *pkey=NULL;
1383 n=ssl3_get_message(s,
1384 SSL3_ST_SR_CERT_VRFY_A,
1385 SSL3_ST_SR_CERT_VRFY_B,
1390 if (!ok) return((int)n);
1392 if (s->session->peer != NULL)
1394 peer=s->session->peer;
1395 pkey=X509_get_pubkey(peer);
1396 type=X509_certificate_type(peer,pkey);
1404 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1406 s->s3->tmp.reuse_message=1;
1407 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1409 al=SSL_AD_UNEXPECTED_MESSAGE;
1410 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1419 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1420 al=SSL_AD_UNEXPECTED_MESSAGE;
1424 if (!(type & EVP_PKT_SIGN))
1426 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1427 al=SSL_AD_ILLEGAL_PARAMETER;
1431 if (s->s3->change_cipher_spec)
1433 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1434 al=SSL_AD_UNEXPECTED_MESSAGE;
1438 /* we now have a signature that we need to verify */
1439 p=(unsigned char *)s->init_buf->data;
1444 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1445 al=SSL_AD_DECODE_ERROR;
1449 j=EVP_PKEY_size(pkey);
1450 if ((i > j) || (n > j) || (n <= 0))
1452 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1453 al=SSL_AD_DECODE_ERROR;
1458 if (pkey->type == EVP_PKEY_RSA)
1460 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1463 al=SSL_AD_DECRYPT_ERROR;
1464 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1467 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1468 memcmp(&(s->s3->tmp.finish_md[0]),p,
1469 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1471 al=SSL_AD_DECRYPT_ERROR;
1472 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1479 if (pkey->type == EVP_PKEY_DSA)
1481 j=DSA_verify(pkey->save_type,
1482 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1483 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1487 al=SSL_AD_DECRYPT_ERROR;
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1495 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1496 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1505 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1511 static int ssl3_get_client_certificate(s)
1514 int i,ok,al,ret= -1;
1516 unsigned long l,nc,llen,n;
1517 unsigned char *p,*d,*q;
1520 n=ssl3_get_message(s,
1524 #if defined(MSDOS) && !defined(WIN32)
1525 1024*30, /* 30k max cert list :-) */
1527 1024*100, /* 100k max cert list :-) */
1531 if (!ok) return((int)n);
1533 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1535 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1536 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1538 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1539 al=SSL_AD_HANDSHAKE_FAILURE;
1542 /* If tls asked for a client cert we must return a 0 list */
1543 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1545 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1546 al=SSL_AD_UNEXPECTED_MESSAGE;
1549 s->s3->tmp.reuse_message=1;
1553 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1555 al=SSL_AD_UNEXPECTED_MESSAGE;
1556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1559 d=p=(unsigned char *)s->init_buf->data;
1561 if ((sk=sk_new_null()) == NULL)
1563 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1570 al=SSL_AD_DECODE_ERROR;
1571 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1574 for (nc=0; nc<llen; )
1577 if ((l+nc+3) > llen)
1579 al=SSL_AD_DECODE_ERROR;
1580 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1585 x=d2i_X509(NULL,&p,l);
1588 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1593 al=SSL_AD_DECODE_ERROR;
1594 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1597 if (!sk_push(sk,(char *)x))
1599 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1606 if (sk_num(sk) <= 0)
1608 /* TLS does not mind 0 certs returned */
1609 if (s->version == SSL3_VERSION)
1611 al=SSL_AD_HANDSHAKE_FAILURE;
1612 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1615 /* Fail for TLS only if we required a certificate */
1616 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1617 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1619 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1620 al=SSL_AD_HANDSHAKE_FAILURE;
1626 i=ssl_verify_cert_chain(s,sk);
1629 al=ssl_verify_alarm_type(s->verify_result);
1630 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1635 /* This should not be needed */
1636 if (s->session->peer != NULL)
1637 X509_free(s->session->peer);
1638 s->session->peer=(X509 *)sk_shift(sk);
1644 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1647 if (x != NULL) X509_free(x);
1648 if (sk != NULL) sk_pop_free(sk,X509_free);
1652 int ssl3_send_server_certificate(s)
1658 if (s->state == SSL3_ST_SW_CERT_A)
1660 x=ssl_get_server_send_cert(s);
1663 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1667 l=ssl3_output_cert_chain(s,x);
1668 s->state=SSL3_ST_SW_CERT_B;
1673 /* SSL3_ST_SW_CERT_B */
1674 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));