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(int ver)
106 if (ver == SSL3_VERSION)
107 return(SSLv3_server_method());
112 SSL_METHOD *SSLv3_server_method(void)
115 static SSL_METHOD SSLv3_server_data;
120 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
122 SSLv3_server_data.ssl_accept=ssl3_accept;
123 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
125 return(&SSLv3_server_data);
128 int ssl3_accept(SSL *s)
131 unsigned long l,Time=time(NULL);
136 int new_state,state,skip=0;
138 RAND_seed(&Time,sizeof(Time));
142 if (s->info_callback != NULL)
144 else if (s->ctx->info_callback != NULL)
145 cb=s->ctx->info_callback;
147 /* init things to blank */
148 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
152 /* FIX THIS EAY EAY EAY */
153 /* we don't actually need a cert, we just need a cert or a DH_tmp */
154 if (((s->session == NULL) || (s->session->cert == NULL)) &&
157 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
169 case SSL_ST_RENEGOTIATE:
171 /* s->state=SSL_ST_ACCEPT; */
175 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
176 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->stats.sess_accept++;
222 s->ctx->stats.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:
246 case SSL3_ST_SR_CLNT_HELLO_A:
247 case SSL3_ST_SR_CLNT_HELLO_B:
248 case SSL3_ST_SR_CLNT_HELLO_C:
251 ret=ssl3_get_client_hello(s);
252 if (ret <= 0) goto end;
253 s->state=SSL3_ST_SW_SRVR_HELLO_A;
257 case SSL3_ST_SW_SRVR_HELLO_A:
258 case SSL3_ST_SW_SRVR_HELLO_B:
259 ret=ssl3_send_server_hello(s);
260 if (ret <= 0) goto end;
263 s->state=SSL3_ST_SW_CHANGE_A;
265 s->state=SSL3_ST_SW_CERT_A;
269 case SSL3_ST_SW_CERT_A:
270 case SSL3_ST_SW_CERT_B:
271 /* Check if it is anon DH */
272 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
274 ret=ssl3_send_server_certificate(s);
275 if (ret <= 0) goto end;
279 s->state=SSL3_ST_SW_KEY_EXCH_A;
283 case SSL3_ST_SW_KEY_EXCH_A:
284 case SSL3_ST_SW_KEY_EXCH_B:
285 l=s->s3->tmp.new_cipher->algorithms;
286 if (s->session->cert == NULL)
290 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
291 s->session->cert=s->cert;
295 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
296 s->session->cert=s->ctx->default_cert;
301 /* clear this, it may get reset by
302 * send_server_key_exchange */
303 if (s->options & SSL_OP_EPHEMERAL_RSA)
304 s->s3->tmp.use_rsa_tmp=1;
306 s->s3->tmp.use_rsa_tmp=0;
308 /* only send if a DH key exchange, fortezza or
309 * RSA but we have a sign only certificate */
310 if (s->s3->tmp.use_rsa_tmp
311 || (l & (SSL_DH|SSL_kFZA))
313 && (ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
315 && EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
321 ret=ssl3_send_server_key_exchange(s);
322 if (ret <= 0) goto end;
327 s->state=SSL3_ST_SW_CERT_REQ_A;
331 case SSL3_ST_SW_CERT_REQ_A:
332 case SSL3_ST_SW_CERT_REQ_B:
333 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
334 ((s->session->peer != NULL) &&
335 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
337 /* no cert request */
339 s->s3->tmp.cert_request=0;
340 s->state=SSL3_ST_SW_SRVR_DONE_A;
344 s->s3->tmp.cert_request=1;
345 ret=ssl3_send_certificate_request(s);
346 if (ret <= 0) goto end;
347 s->state=SSL3_ST_SW_SRVR_DONE_A;
352 case SSL3_ST_SW_SRVR_DONE_A:
353 case SSL3_ST_SW_SRVR_DONE_B:
354 ret=ssl3_send_server_done(s);
355 if (ret <= 0) goto end;
356 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
357 s->state=SSL3_ST_SW_FLUSH;
361 case SSL3_ST_SW_FLUSH:
362 /* number of bytes to be flushed */
363 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
366 s->rwstate=SSL_WRITING;
367 num1=BIO_flush(s->wbio);
368 if (num1 <= 0) { ret= -1; goto end; }
369 s->rwstate=SSL_NOTHING;
372 s->state=s->s3->tmp.next_state;
375 case SSL3_ST_SR_CERT_A:
376 case SSL3_ST_SR_CERT_B:
377 /* could be sent for a DH cert, even if we
378 * have not asked for it :-) */
379 ret=ssl3_get_client_certificate(s);
380 if (ret <= 0) goto end;
382 s->state=SSL3_ST_SR_KEY_EXCH_A;
385 case SSL3_ST_SR_KEY_EXCH_A:
386 case SSL3_ST_SR_KEY_EXCH_B:
387 ret=ssl3_get_client_key_exchange(s);
388 if (ret <= 0) goto end;
389 s->state=SSL3_ST_SR_CERT_VRFY_A;
392 /* We need to get hashes here so if there is
393 * a client cert, it can be verified */
394 s->method->ssl3_enc->cert_verify_mac(s,
395 &(s->s3->finish_dgst1),
396 &(s->s3->tmp.finish_md[0]));
397 s->method->ssl3_enc->cert_verify_mac(s,
398 &(s->s3->finish_dgst2),
399 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
403 case SSL3_ST_SR_CERT_VRFY_A:
404 case SSL3_ST_SR_CERT_VRFY_B:
406 /* we should decide if we expected this one */
407 ret=ssl3_get_cert_verify(s);
408 if (ret <= 0) goto end;
410 s->state=SSL3_ST_SR_FINISHED_A;
414 case SSL3_ST_SR_FINISHED_A:
415 case SSL3_ST_SR_FINISHED_B:
416 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
417 SSL3_ST_SR_FINISHED_B);
418 if (ret <= 0) goto end;
422 s->state=SSL3_ST_SW_CHANGE_A;
426 case SSL3_ST_SW_CHANGE_A:
427 case SSL3_ST_SW_CHANGE_B:
429 s->session->cipher=s->s3->tmp.new_cipher;
430 if (!s->method->ssl3_enc->setup_key_block(s))
431 { ret= -1; goto end; }
433 ret=ssl3_send_change_cipher_spec(s,
434 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
436 if (ret <= 0) goto end;
437 s->state=SSL3_ST_SW_FINISHED_A;
440 if (!s->method->ssl3_enc->change_cipher_state(s,
441 SSL3_CHANGE_CIPHER_SERVER_WRITE))
449 case SSL3_ST_SW_FINISHED_A:
450 case SSL3_ST_SW_FINISHED_B:
451 ret=ssl3_send_finished(s,
452 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
453 s->method->ssl3_enc->server_finished,
454 s->method->ssl3_enc->server_finished_len);
455 if (ret <= 0) goto end;
456 s->state=SSL3_ST_SW_FLUSH;
458 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
460 s->s3->tmp.next_state=SSL_ST_OK;
465 /* clean a few things up */
466 ssl3_cleanup_key_block(s);
468 BUF_MEM_free(s->init_buf);
471 /* remove buffering on output */
472 ssl_free_wbio_buffer(s);
477 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
479 s->ctx->stats.sess_accept_good++;
481 s->handshake_func=ssl3_accept;
484 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
490 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
496 if (!s->s3->tmp.reuse_message && !skip)
500 if ((ret=BIO_flush(s->wbio)) <= 0)
505 if ((cb != NULL) && (s->state != state))
509 cb(s,SSL_CB_ACCEPT_LOOP,1);
516 /* BIO_flush(s->wbio); */
519 cb(s,SSL_CB_ACCEPT_EXIT,ret);
524 static int ssl3_send_hello_request(SSL *s)
528 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
530 p=(unsigned char *)s->init_buf->data;
531 *(p++)=SSL3_MT_CLIENT_REQUEST;
536 s->state=SSL3_ST_SW_HELLO_REQ_B;
537 /* number of bytes to write */
542 /* SSL3_ST_SW_HELLO_REQ_B */
543 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
546 static int ssl3_get_client_hello(SSL *s)
548 int i,j,ok,al,ret= -1;
551 unsigned char *p,*d,*q;
554 STACK_OF(SSL_CIPHER) *ciphers=NULL;
556 /* We do this so that we will respond with our native type.
557 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
558 * This down switching should be handled by a different method.
559 * If we are SSLv3, we will respond with SSLv3, even if prompted with
562 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
565 s->state=SSL3_ST_SR_CLNT_HELLO_B;
567 n=ssl3_get_message(s,
568 SSL3_ST_SR_CLNT_HELLO_B,
569 SSL3_ST_SR_CLNT_HELLO_C,
570 SSL3_MT_CLIENT_HELLO,
571 SSL3_RT_MAX_PLAIN_LENGTH,
574 if (!ok) return((int)n);
575 d=p=(unsigned char *)s->init_buf->data;
577 /* The version number has already been checked in ssl3_get_message.
578 * I a native TLSv1/SSLv3 method, the match must be correct except
579 * perhaps for the first message */
580 /* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
583 /* load the client random */
584 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
587 /* get the session-id */
593 if (!ssl_get_new_session(s,1))
598 i=ssl_get_prev_session(s,p,j);
600 { /* previous session */
605 if (!ssl_get_new_session(s,1))
612 if ((i == 0) && (j != 0))
614 /* we need a cipher if we are not resuming a session */
615 al=SSL_AD_ILLEGAL_PARAMETER;
616 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
621 /* not enough data */
622 al=SSL_AD_DECODE_ERROR;
623 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
626 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
633 /* If it is a hit, check that the cipher is in the list */
634 if ((s->hit) && (i > 0))
637 id=s->session->cipher->id;
640 printf("client sent %d ciphers\n",sk_num(ciphers));
642 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
644 c=sk_SSL_CIPHER_value(ciphers,i);
646 printf("client [%2d of %2d]:%s\n",
647 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
657 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
659 /* Very bad for multi-threading.... */
660 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
665 /* we need to have the cipher in the cipher
666 * list if we are asked to reuse it */
667 al=SSL_AD_ILLEGAL_PARAMETER;
668 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
679 if (p[j] == 0) break;
686 al=SSL_AD_DECODE_ERROR;
687 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
691 /* Worst case, we will use the NULL compression, but if we have other
692 * options, we will now look for them. We have i-1 compression
693 * algorithms from the client, starting at q. */
694 s->s3->tmp.new_compression=NULL;
695 if (s->ctx->comp_methods != NULL)
696 { /* See if we have a match */
699 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
702 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
715 s->s3->tmp.new_compression=comp;
720 /* TLS does not mind if there is extra stuff */
721 if (s->version == SSL3_VERSION)
725 /* wrong number of bytes,
726 * there could be more to follow */
727 al=SSL_AD_DECODE_ERROR;
728 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
733 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
738 s->session->compress_meth=(comp == NULL)?0:comp->id;
739 if (s->session->ciphers != NULL)
740 sk_SSL_CIPHER_free(s->session->ciphers);
741 s->session->ciphers=ciphers;
744 al=SSL_AD_ILLEGAL_PARAMETER;
745 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
749 c=ssl3_choose_cipher(s,s->session->ciphers,
750 ssl_get_ciphers_by_id(s));
754 al=SSL_AD_HANDSHAKE_FAILURE;
755 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
758 s->s3->tmp.new_cipher=c;
762 /* Session-id reuse */
763 #ifdef REUSE_CIPHER_BUG
764 STACK_OF(SSL_CIPHER) *sk;
768 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
770 sk=s->session->ciphers;
771 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
773 c=sk_SSL_CIPHER_value(sk,i);
774 if (c->algorithms & SSL_eNULL)
776 if (SSL_C_IS_EXPORT(c))
780 s->s3->tmp.new_cipher=nc;
782 s->s3->tmp.new_cipher=ec;
784 s->s3->tmp.new_cipher=s->session->cipher;
788 s->s3->tmp.new_cipher=s->session->cipher;
791 /* we now have the following setup.
793 * cipher_list - our prefered list of ciphers
794 * ciphers - the clients prefered list of ciphers
795 * compression - basically ignored right now
796 * ssl version is set - sslv3
797 * s->session - The ssl session has been setup.
798 * s->hit - sesson reuse flag
799 * s->tmp.new_cipher - the new cipher to use.
806 ssl3_send_alert(s,SSL3_AL_FATAL,al);
809 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
813 static int ssl3_send_server_hello(SSL *s)
818 unsigned long l,Time;
820 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
822 buf=(unsigned char *)s->init_buf->data;
823 p=s->s3->server_random;
824 Time=time(NULL); /* Time */
826 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
827 /* Do the message type and length last */
830 *(p++)=s->version>>8;
831 *(p++)=s->version&0xff;
834 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
837 /* now in theory we have 3 options to sending back the
838 * session id. If it is a re-use, we send back the
839 * old session-id, if it is a new session, we send
840 * back the new session-id or we send back a 0 length
841 * session-id if we want it to be single use.
842 * Currently I will not implement the '0' length session-id
843 * 12-Jan-98 - I'll now support the '0' length stuff.
845 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
846 s->session->session_id_length=0;
848 sl=s->session->session_id_length;
850 memcpy(p,s->session->session_id,sl);
854 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
857 /* put the compression method */
858 if (s->s3->tmp.new_compression == NULL)
861 *(p++)=s->s3->tmp.new_compression->id;
866 *(d++)=SSL3_MT_SERVER_HELLO;
869 s->state=SSL3_ST_CW_CLNT_HELLO_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_done(SSL *s)
883 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
885 p=(unsigned char *)s->init_buf->data;
888 *(p++)=SSL3_MT_SERVER_DONE;
893 s->state=SSL3_ST_SW_SRVR_DONE_B;
894 /* number of bytes to write */
899 /* SSL3_ST_CW_CLNT_HELLO_B */
900 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
903 static int ssl3_send_server_key_exchange(SSL *s)
909 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
925 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
927 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
928 cert=s->session->cert;
932 r[0]=r[1]=r[2]=r[3]=NULL;
938 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
940 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
941 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
942 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
943 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
948 al=SSL_AD_HANDSHAKE_FAILURE;
949 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
954 s->s3->tmp.use_rsa_tmp=1;
962 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
963 dhp=cert->dh_tmp_cb(s,
964 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
965 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
968 al=SSL_AD_HANDSHAKE_FAILURE;
969 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
972 if ((dh=DHparams_dup(dhp)) == NULL)
974 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
979 if ((dhp->pub_key == NULL ||
980 dhp->priv_key == NULL ||
981 (s->options & SSL_OP_SINGLE_DH_USE)))
983 if(!DH_generate_key(dh))
985 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
992 dh->pub_key=BN_dup(dhp->pub_key);
993 dh->priv_key=BN_dup(dhp->priv_key);
994 if ((dh->pub_key == NULL) ||
995 (dh->priv_key == NULL))
997 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1008 al=SSL_AD_HANDSHAKE_FAILURE;
1009 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1012 for (i=0; r[i] != NULL; i++)
1014 nr[i]=BN_num_bytes(r[i]);
1018 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1020 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1023 al=SSL_AD_DECODE_ERROR;
1026 kn=EVP_PKEY_size(pkey);
1034 if (!BUF_MEM_grow(buf,n+4+kn))
1036 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1039 d=(unsigned char *)s->init_buf->data;
1042 for (i=0; r[i] != NULL; i++)
1052 /* n is the length of the params, they start at &(d[4])
1053 * and p points to the space at the end. */
1055 if (pkey->type == EVP_PKEY_RSA)
1059 for (num=2; num > 0; num--)
1061 EVP_DigestInit(&md_ctx,(num == 2)
1062 ?s->ctx->md5:s->ctx->sha1);
1063 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1064 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1065 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1066 EVP_DigestFinal(&md_ctx,q,
1067 (unsigned int *)&i);
1071 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1072 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1075 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1083 #if !defined(NO_DSA)
1084 if (pkey->type == EVP_PKEY_DSA)
1087 EVP_SignInit(&md_ctx,EVP_dss1());
1088 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1089 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1090 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1091 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1092 (unsigned int *)&i,pkey))
1094 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1103 /* Is this error check actually needed? */
1104 al=SSL_AD_HANDSHAKE_FAILURE;
1105 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1110 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1113 /* we should now have things packed up, so lets send
1119 /* SSL3_ST_SW_KEY_EXCH_B */
1120 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1122 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1127 static int ssl3_send_certificate_request(SSL *s)
1129 unsigned char *p,*d;
1131 STACK_OF(X509_NAME) *sk=NULL;
1135 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1139 d=p=(unsigned char *)&(buf->data[4]);
1141 /* get the list of acceptable cert types */
1143 n=ssl3_get_req_cert_type(s,p);
1152 sk=SSL_get_client_CA_list(s);
1156 for (i=0; i<sk_X509_NAME_num(sk); i++)
1158 name=sk_X509_NAME_value(sk,i);
1159 j=i2d_X509_NAME(name,NULL);
1160 if (!BUF_MEM_grow(buf,4+n+j+2))
1162 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1165 p=(unsigned char *)&(buf->data[4+n]);
1166 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1169 i2d_X509_NAME(name,&p);
1176 i2d_X509_NAME(name,&p);
1177 j-=2; s2n(j,d); j+=2;
1183 /* else no CA names */
1184 p=(unsigned char *)&(buf->data[4+off]);
1187 d=(unsigned char *)buf->data;
1188 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1191 /* we should now have things packed up, so lets send
1198 /* SSL3_ST_SW_CERT_REQ_B */
1199 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1204 static int ssl3_get_client_key_exchange(SSL *s)
1211 EVP_PKEY *pkey=NULL;
1217 n=ssl3_get_message(s,
1218 SSL3_ST_SR_KEY_EXCH_A,
1219 SSL3_ST_SR_KEY_EXCH_B,
1220 SSL3_MT_CLIENT_KEY_EXCHANGE,
1224 if (!ok) return((int)n);
1225 p=(unsigned char *)s->init_buf->data;
1227 l=s->s3->tmp.new_cipher->algorithms;
1232 /* FIX THIS UP EAY EAY EAY EAY */
1233 if (s->s3->tmp.use_rsa_tmp)
1235 if ((s->session->cert != NULL) &&
1236 (s->session->cert->rsa_tmp != NULL))
1237 rsa=s->session->cert->rsa_tmp;
1238 else if ((s->ctx->default_cert != NULL) &&
1239 (s->ctx->default_cert->rsa_tmp != NULL))
1240 rsa=s->ctx->default_cert->rsa_tmp;
1241 /* Don't do a callback because rsa_tmp should
1242 * be sent already */
1245 al=SSL_AD_HANDSHAKE_FAILURE;
1246 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1253 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1254 if ( (pkey == NULL) ||
1255 (pkey->type != EVP_PKEY_RSA) ||
1256 (pkey->pkey.rsa == NULL))
1258 al=SSL_AD_HANDSHAKE_FAILURE;
1259 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1266 if (s->version > SSL3_VERSION)
1271 if (!(s->options & SSL_OP_TLS_D5_BUG))
1273 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1283 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1286 /* If a bad decrypt, use a random master key */
1287 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1288 ((p[0] != (s->client_version>>8)) ||
1289 (p[1] != (s->client_version & 0xff))))
1293 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1294 (p[0] == (s->version>>8)) &&
1297 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1302 p[0]=(s->version>>8);
1303 p[1]=(s->version & 0xff);
1304 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1305 i=SSL_MAX_MASTER_KEY_LENGTH;
1307 /* else, an SSLeay bug, ssl only server, tls client */
1310 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1312 al=SSL_AD_DECODE_ERROR;
1313 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1317 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1319 al=SSL_AD_DECODE_ERROR;
1320 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1325 s->session->master_key_length=
1326 s->method->ssl3_enc->generate_master_secret(s,
1327 s->session->master_key,
1334 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1339 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1341 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1351 if (n == 0L) /* the parameters are in the cert */
1353 al=SSL_AD_HANDSHAKE_FAILURE;
1354 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1359 if (s->s3->tmp.dh == NULL)
1361 al=SSL_AD_HANDSHAKE_FAILURE;
1362 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1366 dh_srvr=s->s3->tmp.dh;
1369 pub=BN_bin2bn(p,i,NULL);
1372 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1376 i=DH_compute_key(p,pub,dh_srvr);
1380 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1384 DH_free(s->s3->tmp.dh);
1389 s->session->master_key_length=
1390 s->method->ssl3_enc->generate_master_secret(s,
1391 s->session->master_key,p,i);
1396 al=SSL_AD_HANDSHAKE_FAILURE;
1397 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1403 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1404 #if !defined(NO_DH) || !defined(NO_RSA)
1410 static int ssl3_get_cert_verify(SSL *s)
1412 EVP_PKEY *pkey=NULL;
1419 n=ssl3_get_message(s,
1420 SSL3_ST_SR_CERT_VRFY_A,
1421 SSL3_ST_SR_CERT_VRFY_B,
1426 if (!ok) return((int)n);
1428 if (s->session->peer != NULL)
1430 peer=s->session->peer;
1431 pkey=X509_get_pubkey(peer);
1432 type=X509_certificate_type(peer,pkey);
1440 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1442 s->s3->tmp.reuse_message=1;
1443 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1445 al=SSL_AD_UNEXPECTED_MESSAGE;
1446 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1455 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1456 al=SSL_AD_UNEXPECTED_MESSAGE;
1460 if (!(type & EVP_PKT_SIGN))
1462 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1463 al=SSL_AD_ILLEGAL_PARAMETER;
1467 if (s->s3->change_cipher_spec)
1469 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1470 al=SSL_AD_UNEXPECTED_MESSAGE;
1474 /* we now have a signature that we need to verify */
1475 p=(unsigned char *)s->init_buf->data;
1480 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1481 al=SSL_AD_DECODE_ERROR;
1485 j=EVP_PKEY_size(pkey);
1486 if ((i > j) || (n > j) || (n <= 0))
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1489 al=SSL_AD_DECODE_ERROR;
1494 if (pkey->type == EVP_PKEY_RSA)
1496 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1499 al=SSL_AD_DECRYPT_ERROR;
1500 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1503 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1504 memcmp(&(s->s3->tmp.finish_md[0]),p,
1505 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1507 al=SSL_AD_DECRYPT_ERROR;
1508 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1515 if (pkey->type == EVP_PKEY_DSA)
1517 j=DSA_verify(pkey->save_type,
1518 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1519 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1523 al=SSL_AD_DECRYPT_ERROR;
1524 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1531 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1532 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1541 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1544 EVP_PKEY_free(pkey);
1548 static int ssl3_get_client_certificate(SSL *s)
1550 int i,ok,al,ret= -1;
1552 unsigned long l,nc,llen,n;
1553 unsigned char *p,*d,*q;
1554 STACK_OF(X509) *sk=NULL;
1556 n=ssl3_get_message(s,
1560 #if defined(MSDOS) && !defined(WIN32)
1561 1024*30, /* 30k max cert list :-) */
1563 1024*100, /* 100k max cert list :-) */
1567 if (!ok) return((int)n);
1569 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1571 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1572 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1574 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1575 al=SSL_AD_HANDSHAKE_FAILURE;
1578 /* If tls asked for a client cert we must return a 0 list */
1579 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1581 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1582 al=SSL_AD_UNEXPECTED_MESSAGE;
1585 s->s3->tmp.reuse_message=1;
1589 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1591 al=SSL_AD_UNEXPECTED_MESSAGE;
1592 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1595 d=p=(unsigned char *)s->init_buf->data;
1597 if ((sk=sk_X509_new_null()) == NULL)
1599 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1606 al=SSL_AD_DECODE_ERROR;
1607 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1610 for (nc=0; nc<llen; )
1613 if ((l+nc+3) > llen)
1615 al=SSL_AD_DECODE_ERROR;
1616 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1621 x=d2i_X509(NULL,&p,l);
1624 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1629 al=SSL_AD_DECODE_ERROR;
1630 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1633 if (!sk_X509_push(sk,x))
1635 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1642 if (sk_X509_num(sk) <= 0)
1644 /* TLS does not mind 0 certs returned */
1645 if (s->version == SSL3_VERSION)
1647 al=SSL_AD_HANDSHAKE_FAILURE;
1648 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1651 /* Fail for TLS only if we required a certificate */
1652 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1653 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1655 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1656 al=SSL_AD_HANDSHAKE_FAILURE;
1662 i=ssl_verify_cert_chain(s,sk);
1665 al=ssl_verify_alarm_type(s->verify_result);
1666 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1671 /* This should not be needed */
1672 if (s->session->peer != NULL)
1673 X509_free(s->session->peer);
1674 s->session->peer=sk_X509_shift(sk);
1675 s->session->cert->cert_chain=sk;
1682 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1685 if (x != NULL) X509_free(x);
1686 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1690 int ssl3_send_server_certificate(SSL *s)
1695 if (s->state == SSL3_ST_SW_CERT_A)
1697 x=ssl_get_server_send_cert(s);
1700 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1704 l=ssl3_output_cert_chain(s,x);
1705 s->state=SSL3_ST_SW_CERT_B;
1710 /* SSL3_ST_SW_CERT_B */
1711 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));