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.]
60 #include <openssl/buffer.h>
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
66 static SSL_METHOD *ssl3_get_client_method(int ver);
67 static int ssl3_client_hello(SSL *s);
68 static int ssl3_get_server_hello(SSL *s);
69 static int ssl3_get_certificate_request(SSL *s);
70 static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
71 static int ssl3_get_server_done(SSL *s);
72 static int ssl3_send_client_verify(SSL *s);
73 static int ssl3_send_client_certificate(SSL *s);
74 static int ssl3_send_client_key_exchange(SSL *s);
75 static int ssl3_get_key_exchange(SSL *s);
76 static int ssl3_get_server_certificate(SSL *s);
77 static int ssl3_check_cert_and_algorithm(SSL *s);
78 static SSL_METHOD *ssl3_get_client_method(int ver)
80 if (ver == SSL3_VERSION)
81 return(SSLv3_client_method());
86 SSL_METHOD *SSLv3_client_method(void)
89 static SSL_METHOD SSLv3_client_data;
94 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
96 SSLv3_client_data.ssl_connect=ssl3_connect;
97 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
99 return(&SSLv3_client_data);
102 int ssl3_connect(SSL *s)
105 unsigned long Time=time(NULL),l;
109 int new_state,state,skip=0;;
111 RAND_seed(&Time,sizeof(Time));
115 if (s->info_callback != NULL)
117 else if (s->ctx->info_callback != NULL)
118 cb=s->ctx->info_callback;
120 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
129 case SSL_ST_RENEGOTIATE:
131 s->state=SSL_ST_CONNECT;
132 s->ctx->stats.sess_connect_renegotiate++;
136 case SSL_ST_BEFORE|SSL_ST_CONNECT:
137 case SSL_ST_OK|SSL_ST_CONNECT:
140 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
142 if ((s->version & 0xff00 ) != 0x0300)
144 /* s->version=SSL3_VERSION; */
145 s->type=SSL_ST_CONNECT;
147 if (s->init_buf == NULL)
149 if ((buf=BUF_MEM_new()) == NULL)
154 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
162 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
164 /* setup buffing BIO */
165 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
167 /* don't push the buffering BIO quite yet */
169 ssl3_init_finished_mac(s);
171 s->state=SSL3_ST_CW_CLNT_HELLO_A;
172 s->ctx->stats.sess_connect++;
176 case SSL3_ST_CW_CLNT_HELLO_A:
177 case SSL3_ST_CW_CLNT_HELLO_B:
180 ret=ssl3_client_hello(s);
181 if (ret <= 0) goto end;
182 s->state=SSL3_ST_CR_SRVR_HELLO_A;
185 /* turn on buffering for the next lot of output */
186 if (s->bbio != s->wbio)
187 s->wbio=BIO_push(s->bbio,s->wbio);
191 case SSL3_ST_CR_SRVR_HELLO_A:
192 case SSL3_ST_CR_SRVR_HELLO_B:
193 ret=ssl3_get_server_hello(s);
194 if (ret <= 0) goto end;
196 s->state=SSL3_ST_CR_FINISHED_A;
198 s->state=SSL3_ST_CR_CERT_A;
202 case SSL3_ST_CR_CERT_A:
203 case SSL3_ST_CR_CERT_B:
204 /* Check if it is anon DH */
205 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
207 ret=ssl3_get_server_certificate(s);
208 if (ret <= 0) goto end;
212 s->state=SSL3_ST_CR_KEY_EXCH_A;
216 case SSL3_ST_CR_KEY_EXCH_A:
217 case SSL3_ST_CR_KEY_EXCH_B:
218 ret=ssl3_get_key_exchange(s);
219 if (ret <= 0) goto end;
220 s->state=SSL3_ST_CR_CERT_REQ_A;
223 /* at this point we check that we have the
224 * required stuff from the server */
225 if (!ssl3_check_cert_and_algorithm(s))
232 case SSL3_ST_CR_CERT_REQ_A:
233 case SSL3_ST_CR_CERT_REQ_B:
234 ret=ssl3_get_certificate_request(s);
235 if (ret <= 0) goto end;
236 s->state=SSL3_ST_CR_SRVR_DONE_A;
240 case SSL3_ST_CR_SRVR_DONE_A:
241 case SSL3_ST_CR_SRVR_DONE_B:
242 ret=ssl3_get_server_done(s);
243 if (ret <= 0) goto end;
244 if (s->s3->tmp.cert_req)
245 s->state=SSL3_ST_CW_CERT_A;
247 s->state=SSL3_ST_CW_KEY_EXCH_A;
252 case SSL3_ST_CW_CERT_A:
253 case SSL3_ST_CW_CERT_B:
254 case SSL3_ST_CW_CERT_C:
255 ret=ssl3_send_client_certificate(s);
256 if (ret <= 0) goto end;
257 s->state=SSL3_ST_CW_KEY_EXCH_A;
261 case SSL3_ST_CW_KEY_EXCH_A:
262 case SSL3_ST_CW_KEY_EXCH_B:
263 ret=ssl3_send_client_key_exchange(s);
264 if (ret <= 0) goto end;
265 l=s->s3->tmp.new_cipher->algorithms;
266 /* EAY EAY EAY need to check for DH fix cert
268 /* For TLS, cert_req is set to 2, so a cert chain
269 * of nothing is sent, but no verify packet is sent */
270 if (s->s3->tmp.cert_req == 1)
272 s->state=SSL3_ST_CW_CERT_VRFY_A;
276 s->state=SSL3_ST_CW_CHANGE_A;
277 s->s3->change_cipher_spec=0;
283 case SSL3_ST_CW_CERT_VRFY_A:
284 case SSL3_ST_CW_CERT_VRFY_B:
285 ret=ssl3_send_client_verify(s);
286 if (ret <= 0) goto end;
287 s->state=SSL3_ST_CW_CHANGE_A;
289 s->s3->change_cipher_spec=0;
292 case SSL3_ST_CW_CHANGE_A:
293 case SSL3_ST_CW_CHANGE_B:
294 ret=ssl3_send_change_cipher_spec(s,
295 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
296 if (ret <= 0) goto end;
297 s->state=SSL3_ST_CW_FINISHED_A;
300 s->session->cipher=s->s3->tmp.new_cipher;
301 if (s->s3->tmp.new_compression == NULL)
302 s->session->compress_meth=0;
304 s->session->compress_meth=
305 s->s3->tmp.new_compression->id;
306 if (!s->method->ssl3_enc->setup_key_block(s))
312 if (!s->method->ssl3_enc->change_cipher_state(s,
313 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
321 case SSL3_ST_CW_FINISHED_A:
322 case SSL3_ST_CW_FINISHED_B:
323 ret=ssl3_send_finished(s,
324 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
325 s->method->ssl3_enc->client_finished,
326 s->method->ssl3_enc->client_finished_len);
327 if (ret <= 0) goto end;
328 s->state=SSL3_ST_CW_FLUSH;
331 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
334 s->s3->tmp.next_state=SSL_ST_OK;
335 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
338 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
339 s->s3->delay_buf_pop_ret=0;
344 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
349 case SSL3_ST_CR_FINISHED_A:
350 case SSL3_ST_CR_FINISHED_B:
352 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
353 SSL3_ST_CR_FINISHED_B);
354 if (ret <= 0) goto end;
357 s->state=SSL3_ST_CW_CHANGE_A;
363 case SSL3_ST_CW_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;
378 /* clean a few things up */
379 ssl3_cleanup_key_block(s);
381 if (s->init_buf != NULL)
383 BUF_MEM_free(s->init_buf);
387 /* If we are not 'joining' the last two packets,
388 * remove the buffering now */
389 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
390 ssl_free_wbio_buffer(s);
391 /* else do it later in ssl3_write */
396 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
397 if (s->hit) s->ctx->stats.sess_hit++;
401 s->handshake_func=ssl3_connect;
402 s->ctx->stats.sess_connect_good++;
404 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
410 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
416 /* did we do anything */
417 if (!s->s3->tmp.reuse_message && !skip)
421 if ((ret=BIO_flush(s->wbio)) <= 0)
425 if ((cb != NULL) && (s->state != state))
429 cb(s,SSL_CB_CONNECT_LOOP,1);
437 cb(s,SSL_CB_CONNECT_EXIT,ret);
443 static int ssl3_client_hello(SSL *s)
448 unsigned long Time,l;
451 buf=(unsigned char *)s->init_buf->data;
452 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
454 if ((s->session == NULL) ||
455 (s->session->ssl_version != s->version) ||
456 (s->session->not_resumable))
458 if (!ssl_get_new_session(s,0))
461 /* else use the pre-loaded session */
463 p=s->s3->client_random;
464 Time=time(NULL); /* Time */
466 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
468 /* Do the message type and length last */
471 *(p++)=s->version>>8;
472 *(p++)=s->version&0xff;
473 s->client_version=s->version;
476 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
483 i=s->session->session_id_length;
487 memcpy(p,s->session->session_id,i);
491 /* Ciphers supported */
492 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
495 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
502 if (s->ctx->comp_methods == NULL)
505 j=sk_SSL_COMP_num(s->ctx->comp_methods);
509 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
512 *(p++)=0; /* Add the NULL method */
516 *(d++)=SSL3_MT_CLIENT_HELLO;
519 s->state=SSL3_ST_CW_CLNT_HELLO_B;
520 /* number of bytes to write */
525 /* SSL3_ST_CW_CLNT_HELLO_B */
526 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
531 static int ssl3_get_server_hello(SSL *s)
533 STACK_OF(SSL_CIPHER) *sk;
541 n=ssl3_get_message(s,
542 SSL3_ST_CR_SRVR_HELLO_A,
543 SSL3_ST_CR_SRVR_HELLO_B,
544 SSL3_MT_SERVER_HELLO,
548 if (!ok) return((int)n);
549 d=p=(unsigned char *)s->init_buf->data;
551 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
553 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
554 s->version=(s->version&0xff00)|p[1];
555 al=SSL_AD_PROTOCOL_VERSION;
560 /* load the server hello data */
561 /* load the server random */
562 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
565 /* get the session-id */
568 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
570 /* SSLref returns 16 :-( */
571 if (j < SSL2_SSL_SESSION_ID_LENGTH)
573 al=SSL_AD_ILLEGAL_PARAMETER;
574 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
578 if (j != 0 && j == s->session->session_id_length
579 && memcmp(p,s->session->session_id,j) == 0)
581 if(s->sid_ctx_length != s->session->sid_ctx_length
582 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
584 al=SSL_AD_ILLEGAL_PARAMETER;
585 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
590 else /* a miss or crap from the other end */
592 /* If we were trying for session-id reuse, make a new
593 * SSL_SESSION so we don't stuff up other people */
595 if (s->session->session_id_length > 0)
597 if (!ssl_get_new_session(s,0))
599 al=SSL_AD_INTERNAL_ERROR;
603 s->session->session_id_length=j;
604 memcpy(s->session->session_id,p,j); /* j could be 0 */
607 c=ssl_get_cipher_by_char(s,p);
611 al=SSL_AD_ILLEGAL_PARAMETER;
612 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
615 p+=ssl_put_cipher_by_char(s,NULL,NULL);
617 sk=ssl_get_ciphers_by_id(s);
618 i=sk_SSL_CIPHER_find(sk,c);
621 /* we did not say we would use this cipher */
622 al=SSL_AD_ILLEGAL_PARAMETER;
623 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
627 if (s->hit && (s->session->cipher != c))
630 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
632 al=SSL_AD_ILLEGAL_PARAMETER;
633 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
637 s->s3->tmp.new_cipher=c;
639 /* lets get the compression algorithm */
645 comp=ssl3_comp_find(s->ctx->comp_methods,j);
647 if ((j != 0) && (comp == NULL))
649 al=SSL_AD_ILLEGAL_PARAMETER;
650 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
655 s->s3->tmp.new_compression=comp;
660 /* wrong packet length */
661 al=SSL_AD_DECODE_ERROR;
662 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
668 ssl3_send_alert(s,SSL3_AL_FATAL,al);
673 static int ssl3_get_server_certificate(SSL *s)
676 unsigned long n,nc,llen,l;
678 unsigned char *p,*d,*q;
679 STACK_OF(X509) *sk=NULL;
683 n=ssl3_get_message(s,
687 #if defined(MSDOS) && !defined(WIN32)
688 1024*30, /* 30k max cert list :-) */
690 1024*100, /* 100k max cert list :-) */
694 if (!ok) return((int)n);
696 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
698 s->s3->tmp.reuse_message=1;
702 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
704 al=SSL_AD_UNEXPECTED_MESSAGE;
705 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
708 d=p=(unsigned char *)s->init_buf->data;
710 if ((sk=sk_X509_new_null()) == NULL)
712 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
719 al=SSL_AD_DECODE_ERROR;
720 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
723 for (nc=0; nc<llen; )
728 al=SSL_AD_DECODE_ERROR;
729 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
734 x=d2i_X509(NULL,&q,l);
737 al=SSL_AD_BAD_CERTIFICATE;
738 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
743 al=SSL_AD_DECODE_ERROR;
744 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
747 if (!sk_X509_push(sk,x))
749 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
757 i=ssl_verify_cert_chain(s,sk);
758 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
760 al=ssl_verify_alarm_type(s->verify_result);
761 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
766 if (c == NULL) goto err;
768 if (s->session->cert) ssl_cert_free(s->session->cert);
772 x=sk_X509_value(sk,0);
775 pkey=X509_get_pubkey(x);
777 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
781 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
785 i=ssl_cert_type(x,pkey);
790 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
795 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
796 if (c->pkeys[i].x509 != NULL)
797 X509_free(c->pkeys[i].x509);
799 c->key= &(c->pkeys[i]);
801 if ((s->session != NULL) && (s->session->peer != NULL))
802 X509_free(s->session->peer);
803 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
812 ssl3_send_alert(s,SSL3_AL_FATAL,al);
817 sk_X509_pop_free(sk,X509_free);
821 static int ssl3_get_key_exchange(SSL *s)
824 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
827 unsigned char *param,*p;
828 int al,i,j,param_len,ok;
836 n=ssl3_get_message(s,
837 SSL3_ST_CR_KEY_EXCH_A,
838 SSL3_ST_CR_KEY_EXCH_B,
843 if (!ok) return((int)n);
845 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
847 s->s3->tmp.reuse_message=1;
851 param=p=(unsigned char *)s->init_buf->data;
853 if (s->session->cert != NULL)
856 if (s->session->cert->rsa_tmp != NULL)
858 RSA_free(s->session->cert->rsa_tmp);
859 s->session->cert->rsa_tmp=NULL;
863 if (s->session->cert->dh_tmp)
865 DH_free(s->session->cert->dh_tmp);
866 s->session->cert->dh_tmp=NULL;
872 s->session->cert=ssl_cert_new();
876 alg=s->s3->tmp.new_cipher->algorithms;
881 if ((rsa=RSA_new()) == NULL)
883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
890 al=SSL_AD_DECODE_ERROR;
891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
894 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
896 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
905 al=SSL_AD_DECODE_ERROR;
906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
909 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
911 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
917 /* s->session->cert->rsa_tmp=rsa;*/
918 /* this should be because we are using an export cipher */
920 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
923 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
926 s->session->cert->rsa_tmp=rsa;
933 if ((dh=DH_new()) == NULL)
935 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
942 al=SSL_AD_DECODE_ERROR;
943 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
946 if (!(dh->p=BN_bin2bn(p,i,NULL)))
948 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
957 al=SSL_AD_DECODE_ERROR;
958 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
961 if (!(dh->g=BN_bin2bn(p,i,NULL)))
963 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
972 al=SSL_AD_DECODE_ERROR;
973 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
976 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
978 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
986 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
991 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
993 /* else anonymous DH, so no certificate or pkey. */
995 s->session->cert->dh_tmp=dh;
998 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1000 al=SSL_AD_ILLEGAL_PARAMETER;
1001 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1007 al=SSL_AD_HANDSHAKE_FAILURE;
1008 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1013 /* p points to the next byte, there are 'n' bytes left */
1016 /* if it was signed, check the signature */
1021 j=EVP_PKEY_size(pkey);
1023 if ((i != n) || (n > j) || (n <= 0))
1025 /* wrong packet length */
1026 al=SSL_AD_DECODE_ERROR;
1027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1032 if (pkey->type == EVP_PKEY_RSA)
1038 for (num=2; num > 0; num--)
1040 EVP_DigestInit(&md_ctx,(num == 2)
1041 ?s->ctx->md5:s->ctx->sha1);
1042 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1043 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1044 EVP_DigestUpdate(&md_ctx,param,param_len);
1045 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1049 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1053 al=SSL_AD_DECRYPT_ERROR;
1054 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1057 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1060 al=SSL_AD_DECRYPT_ERROR;
1061 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1068 if (pkey->type == EVP_PKEY_DSA)
1071 EVP_VerifyInit(&md_ctx,EVP_dss1());
1072 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1073 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1074 EVP_VerifyUpdate(&md_ctx,param,param_len);
1075 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1078 al=SSL_AD_DECRYPT_ERROR;
1079 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1086 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1092 /* still data left over */
1093 if (!(alg & SSL_aNULL))
1095 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1100 al=SSL_AD_DECODE_ERROR;
1101 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1105 EVP_PKEY_free(pkey);
1108 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1110 EVP_PKEY_free(pkey);
1114 static int ssl3_get_certificate_request(SSL *s)
1117 unsigned long n,nc,l;
1118 unsigned int llen,ctype_num,i;
1120 unsigned char *p,*d,*q;
1121 STACK_OF(X509_NAME) *ca_sk=NULL;
1123 n=ssl3_get_message(s,
1124 SSL3_ST_CR_CERT_REQ_A,
1125 SSL3_ST_CR_CERT_REQ_B,
1127 #if defined(MSDOS) && !defined(WIN32)
1128 1024*30, /* 30k max cert list :-) */
1130 1024*100, /* 100k max cert list :-) */
1134 if (!ok) return((int)n);
1136 s->s3->tmp.cert_req=0;
1138 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1140 s->s3->tmp.reuse_message=1;
1144 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1146 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1147 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1151 /* TLS does not like anon-DH with client cert */
1152 if (s->version > SSL3_VERSION)
1154 l=s->s3->tmp.new_cipher->algorithms;
1157 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1158 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1163 d=p=(unsigned char *)s->init_buf->data;
1165 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1167 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1171 /* get the certificate types */
1173 if (ctype_num > SSL3_CT_NUMBER)
1174 ctype_num=SSL3_CT_NUMBER;
1175 for (i=0; i<ctype_num; i++)
1176 s->s3->tmp.ctype[i]= p[i];
1179 /* get the CA RDNs */
1184 out=fopen("/tmp/vsign.der","w");
1185 fwrite(p,1,llen,out);
1190 if ((llen+ctype_num+2+1) != n)
1192 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1193 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1197 for (nc=0; nc<llen; )
1200 if ((l+nc+2) > llen)
1202 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1203 goto cont; /* netscape bugs */
1204 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1205 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1211 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1213 /* If netscape tollerance is on, ignore errors */
1214 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1218 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1219 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1227 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1230 if (!sk_X509_NAME_push(ca_sk,xn))
1232 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1246 /* we should setup a certficate to return.... */
1247 s->s3->tmp.cert_req=1;
1248 s->s3->tmp.ctype_num=ctype_num;
1249 if (s->s3->tmp.ca_names != NULL)
1250 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1251 s->s3->tmp.ca_names=ca_sk;
1256 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1260 static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
1262 return(X509_NAME_cmp(*a,*b));
1265 static int ssl3_get_server_done(SSL *s)
1270 n=ssl3_get_message(s,
1271 SSL3_ST_CR_SRVR_DONE_A,
1272 SSL3_ST_CR_SRVR_DONE_B,
1273 SSL3_MT_SERVER_DONE,
1274 30, /* should be very small, like 0 :-) */
1277 if (!ok) return((int)n);
1280 /* should contain no data */
1281 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1282 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1288 static int ssl3_send_client_key_exchange(SSL *s)
1290 unsigned char *p,*q,*d;
1293 EVP_PKEY *pkey=NULL;
1295 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1297 d=(unsigned char *)s->init_buf->data;
1300 l=s->s3->tmp.new_cipher->algorithms;
1306 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1308 if (s->session->cert->rsa_tmp != NULL)
1309 rsa=s->session->cert->rsa_tmp;
1312 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1313 if ((pkey == NULL) ||
1314 (pkey->type != EVP_PKEY_RSA) ||
1315 (pkey->pkey.rsa == NULL))
1317 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1323 tmp_buf[0]=s->client_version>>8;
1324 tmp_buf[1]=s->client_version&0xff;
1325 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1327 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1330 /* Fix buf for TLS and beyond */
1331 if (s->version > SSL3_VERSION)
1333 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1334 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1336 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1337 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1341 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1345 /* Fix buf for TLS and beyond */
1346 if (s->version > SSL3_VERSION)
1352 s->session->master_key_length=
1353 s->method->ssl3_enc->generate_master_secret(s,
1354 s->session->master_key,
1355 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1356 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1361 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1363 DH *dh_srvr,*dh_clnt;
1365 if (s->session->cert->dh_tmp != NULL)
1366 dh_srvr=s->session->cert->dh_tmp;
1369 /* we get them from the cert */
1370 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1371 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1375 /* generate a new random key */
1376 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1378 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1381 if (!DH_generate_key(dh_clnt))
1383 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1387 /* use the 'p' output buffer for the DH key, but
1388 * make sure to clear it out afterwards */
1390 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1394 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1398 /* generate master key from the result */
1399 s->session->master_key_length=
1400 s->method->ssl3_enc->generate_master_secret(s,
1401 s->session->master_key,p,n);
1405 /* send off the data */
1406 n=BN_num_bytes(dh_clnt->pub_key);
1408 BN_bn2bin(dh_clnt->pub_key,p);
1413 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1418 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1419 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1423 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1426 s->state=SSL3_ST_CW_KEY_EXCH_B;
1427 /* number of bytes to write */
1432 /* SSL3_ST_CW_KEY_EXCH_B */
1433 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1438 static int ssl3_send_client_verify(SSL *s)
1440 unsigned char *p,*d;
1441 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1449 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1451 d=(unsigned char *)s->init_buf->data;
1453 pkey=s->cert->key->privatekey;
1455 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1456 &(data[MD5_DIGEST_LENGTH]));
1459 if (pkey->type == EVP_PKEY_RSA)
1461 s->method->ssl3_enc->cert_verify_mac(s,
1462 &(s->s3->finish_dgst1),&(data[0]));
1463 i=RSA_private_encrypt(
1464 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1465 data,&(p[2]),pkey->pkey.rsa,
1469 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1478 if (pkey->type == EVP_PKEY_DSA)
1480 if (!DSA_sign(pkey->save_type,
1481 &(data[MD5_DIGEST_LENGTH]),
1482 SHA_DIGEST_LENGTH,&(p[2]),
1483 (unsigned int *)&j,pkey->pkey.dsa))
1485 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1494 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1497 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1500 s->init_num=(int)n+4;
1503 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1508 static int ssl3_send_client_certificate(SSL *s)
1511 EVP_PKEY *pkey=NULL;
1515 if (s->state == SSL3_ST_CW_CERT_A)
1517 if ((s->cert == NULL) ||
1518 (s->cert->key->x509 == NULL) ||
1519 (s->cert->key->privatekey == NULL))
1520 s->state=SSL3_ST_CW_CERT_B;
1522 s->state=SSL3_ST_CW_CERT_C;
1525 /* We need to get a client cert */
1526 if (s->state == SSL3_ST_CW_CERT_B)
1528 /* If we get an error, we need to
1529 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1530 * We then get retied later */
1532 if (s->ctx->client_cert_cb != NULL)
1533 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1536 s->rwstate=SSL_X509_LOOKUP;
1539 s->rwstate=SSL_NOTHING;
1540 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1542 s->state=SSL3_ST_CW_CERT_B;
1543 if ( !SSL_use_certificate(s,x509) ||
1544 !SSL_use_PrivateKey(s,pkey))
1550 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1553 if (x509 != NULL) X509_free(x509);
1554 if (pkey != NULL) EVP_PKEY_free(pkey);
1557 if (s->version == SSL3_VERSION)
1559 s->s3->tmp.cert_req=0;
1560 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1565 s->s3->tmp.cert_req=2;
1569 /* Ok, we have a cert */
1570 s->state=SSL3_ST_CW_CERT_C;
1573 if (s->state == SSL3_ST_CW_CERT_C)
1575 s->state=SSL3_ST_CW_CERT_D;
1576 l=ssl3_output_cert_chain(s,
1577 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1581 /* SSL3_ST_CW_CERT_D */
1582 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1585 #define has_bits(i,m) (((i)&(m)) == (m))
1587 static int ssl3_check_cert_and_algorithm(SSL *s)
1591 EVP_PKEY *pkey=NULL;
1600 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1604 algs=s->s3->tmp.new_cipher->algorithms;
1606 /* we don't have a certificate */
1607 if (algs & (SSL_aDH|SSL_aNULL))
1610 rsa=s->session->cert->rsa_tmp;
1611 dh=s->session->cert->dh_tmp;
1613 /* This is the passed certificate */
1616 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1617 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1618 EVP_PKEY_free(pkey);
1621 /* Check that we have a certificate if we require one */
1622 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1624 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1628 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1630 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1635 if ((algs & SSL_kRSA) &&
1636 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1638 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1642 else if ((algs & SSL_kEDH) &&
1643 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1645 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1648 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1650 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1654 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1656 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1662 if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
1665 if (algs & SSL_kRSA)
1668 || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
1670 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1677 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1680 || DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
1682 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1689 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1695 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);