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.]
67 /* SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
68 * SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
69 * SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
70 * SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
71 * SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
72 * SSLerr(SSL_F_SSL3_GET_SERVER_DONE,ERR_R_MALLOC_FAILURE);
73 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
77 static int ssl3_client_hello(SSL *s);
78 static int ssl3_get_server_hello(SSL *s);
79 static int ssl3_get_certificate_request(SSL *s);
80 static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
81 static int ssl3_get_server_done(SSL *s);
82 static int ssl3_send_client_verify(SSL *s);
83 static int ssl3_send_client_certificate(SSL *s);
84 static int ssl3_send_client_key_exchange(SSL *s);
85 static int ssl3_get_key_exchange(SSL *s);
86 static int ssl3_get_server_certificate(SSL *s);
87 static int ssl3_check_cert_and_algorithm(SSL *s);
89 static int ssl3_client_hello();
90 static int ssl3_get_server_hello();
91 static int ssl3_get_certificate_request();
92 static int ca_dn_cmp();
93 static int ssl3_get_server_done();
94 static int ssl3_send_client_verify();
95 static int ssl3_send_client_certificate();
96 static int ssl3_send_client_key_exchange();
97 static int ssl3_get_key_exchange();
98 static int ssl3_get_server_certificate();
99 static int ssl3_check_cert_and_algorithm();
102 static SSL_METHOD *ssl3_get_client_method(ver)
105 if (ver == SSL3_VERSION)
106 return(SSLv3_client_method());
111 SSL_METHOD *SSLv3_client_method()
114 static SSL_METHOD SSLv3_client_data;
119 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
121 SSLv3_client_data.ssl_connect=ssl3_connect;
122 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
124 return(&SSLv3_client_data);
131 unsigned long Time=time(NULL),l;
136 int new_state,state,skip=0;;
138 RAND_seed((unsigned char *)&Time,sizeof(Time));
142 if (s->info_callback != NULL)
144 else if (s->ctx->info_callback != NULL)
145 cb=s->ctx->info_callback;
147 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
156 case SSL_ST_RENEGOTIATE:
158 s->state=SSL_ST_CONNECT;
159 s->ctx->sess_connect_renegotiate++;
163 case SSL_ST_BEFORE|SSL_ST_CONNECT:
164 case SSL_ST_OK|SSL_ST_CONNECT:
166 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
168 if ((s->version & 0xff00 ) != 0x0300)
170 /* s->version=SSL3_VERSION; */
171 s->type=SSL_ST_CONNECT;
173 if (s->init_buf == NULL)
175 if ((buf=BUF_MEM_new()) == NULL)
180 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
188 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
190 /* setup buffing BIO */
191 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
193 /* don't push the buffering BIO quite yet */
195 ssl3_init_finished_mac(s);
197 s->state=SSL3_ST_CW_CLNT_HELLO_A;
198 s->ctx->sess_connect++;
202 case SSL3_ST_CW_CLNT_HELLO_A:
203 case SSL3_ST_CW_CLNT_HELLO_B:
206 ret=ssl3_client_hello(s);
207 if (ret <= 0) goto end;
208 s->state=SSL3_ST_CR_SRVR_HELLO_A;
211 /* turn on buffering for the next lot of output */
212 if (s->bbio != s->wbio)
213 s->wbio=BIO_push(s->bbio,s->wbio);
217 case SSL3_ST_CR_SRVR_HELLO_A:
218 case SSL3_ST_CR_SRVR_HELLO_B:
219 ret=ssl3_get_server_hello(s);
220 if (ret <= 0) goto end;
222 s->state=SSL3_ST_CR_FINISHED_A;
224 s->state=SSL3_ST_CR_CERT_A;
228 case SSL3_ST_CR_CERT_A:
229 case SSL3_ST_CR_CERT_B:
230 /* Check if it is anon DH */
231 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
233 ret=ssl3_get_server_certificate(s);
234 if (ret <= 0) goto end;
238 s->state=SSL3_ST_CR_KEY_EXCH_A;
242 case SSL3_ST_CR_KEY_EXCH_A:
243 case SSL3_ST_CR_KEY_EXCH_B:
244 ret=ssl3_get_key_exchange(s);
245 if (ret <= 0) goto end;
246 s->state=SSL3_ST_CR_CERT_REQ_A;
249 /* at this point we check that we have the
250 * required stuff from the server */
251 if (!ssl3_check_cert_and_algorithm(s))
258 case SSL3_ST_CR_CERT_REQ_A:
259 case SSL3_ST_CR_CERT_REQ_B:
260 ret=ssl3_get_certificate_request(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_CR_SRVR_DONE_A;
266 case SSL3_ST_CR_SRVR_DONE_A:
267 case SSL3_ST_CR_SRVR_DONE_B:
268 ret=ssl3_get_server_done(s);
269 if (ret <= 0) goto end;
270 if (s->s3->tmp.cert_req)
271 s->state=SSL3_ST_CW_CERT_A;
273 s->state=SSL3_ST_CW_KEY_EXCH_A;
278 case SSL3_ST_CW_CERT_A:
279 case SSL3_ST_CW_CERT_B:
280 case SSL3_ST_CW_CERT_C:
281 ret=ssl3_send_client_certificate(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CW_KEY_EXCH_A;
287 case SSL3_ST_CW_KEY_EXCH_A:
288 case SSL3_ST_CW_KEY_EXCH_B:
289 ret=ssl3_send_client_key_exchange(s);
290 if (ret <= 0) goto end;
291 l=s->s3->tmp.new_cipher->algorithms;
292 /* EAY EAY EAY need to check for DH fix cert
294 /* For TLS, cert_req is set to 2, so a cert chain
295 * of nothing is sent, but no verify packet is sent */
296 if (s->s3->tmp.cert_req == 1)
298 s->state=SSL3_ST_CW_CERT_VRFY_A;
302 s->state=SSL3_ST_CW_CHANGE_A;
303 s->s3->change_cipher_spec=0;
309 case SSL3_ST_CW_CERT_VRFY_A:
310 case SSL3_ST_CW_CERT_VRFY_B:
311 ret=ssl3_send_client_verify(s);
312 if (ret <= 0) goto end;
313 s->state=SSL3_ST_CW_CHANGE_A;
315 s->s3->change_cipher_spec=0;
318 case SSL3_ST_CW_CHANGE_A:
319 case SSL3_ST_CW_CHANGE_B:
320 ret=ssl3_send_change_cipher_spec(s,
321 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
322 if (ret <= 0) goto end;
323 s->state=SSL3_ST_CW_FINISHED_A;
326 s->session->cipher=s->s3->tmp.new_cipher;
327 if (!s->method->ssl3_enc->setup_key_block(s))
333 if (!s->method->ssl3_enc->change_cipher_state(s,
334 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
342 case SSL3_ST_CW_FINISHED_A:
343 case SSL3_ST_CW_FINISHED_B:
344 ret=ssl3_send_finished(s,
345 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
346 s->method->ssl3_enc->client_finished,
347 s->method->ssl3_enc->client_finished_len);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CW_FLUSH;
352 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
355 s->s3->tmp.next_state=SSL_ST_OK;
356 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
359 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
360 s->s3->delay_buf_pop_ret=0;
365 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
370 case SSL3_ST_CR_FINISHED_A:
371 case SSL3_ST_CR_FINISHED_B:
373 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
374 SSL3_ST_CR_FINISHED_B);
375 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CW_CHANGE_A;
384 case SSL3_ST_CW_FLUSH:
385 /* number of bytes to be flushed */
386 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
389 s->rwstate=SSL_WRITING;
390 num1=BIO_flush(s->wbio);
391 if (num1 <= 0) { ret= -1; goto end; }
392 s->rwstate=SSL_NOTHING;
395 s->state=s->s3->tmp.next_state;
399 /* clean a few things up */
400 ssl3_cleanup_key_block(s);
402 BUF_MEM_free(s->init_buf);
405 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
407 /* remove buffering */
408 under=BIO_pop(s->wbio);
417 /* else do it later */
422 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
423 if (s->hit) s->ctx->sess_hit++;
427 s->handshake_func=ssl3_connect;
428 s->ctx->sess_connect_good++;
430 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
436 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
442 /* did we do anything */
443 if (!s->s3->tmp.reuse_message && !skip)
447 if ((ret=BIO_flush(s->wbio)) <= 0)
451 if ((cb != NULL) && (s->state != state))
455 cb(s,SSL_CB_CONNECT_LOOP,1);
463 cb(s,SSL_CB_CONNECT_EXIT,ret);
469 static int ssl3_client_hello(s)
475 unsigned long Time,l;
477 buf=(unsigned char *)s->init_buf->data;
478 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
480 if ((s->session == NULL) ||
481 (s->session->ssl_version != s->version) ||
482 (s->session->not_resumable))
484 if (!ssl_get_new_session(s,0))
487 /* else use the pre-loaded session */
489 p=s->s3->client_random;
490 Time=time(NULL); /* Time */
492 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
494 /* Do the message type and length last */
497 *(p++)=s->version>>8;
498 *(p++)=s->version&0xff;
501 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
508 i=s->session->session_id_length;
512 memcpy(p,s->session->session_id,i);
516 /* Ciphers supported */
517 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
520 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
526 /* hardwire in the NULL compression algorithm. */
533 *(d++)=SSL3_MT_CLIENT_HELLO;
536 s->state=SSL3_ST_CW_CLNT_HELLO_B;
537 /* number of bytes to write */
542 /* SSL3_ST_CW_CLNT_HELLO_B */
543 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
548 static int ssl3_get_server_hello(s)
558 n=ssl3_get_message(s,
559 SSL3_ST_CR_SRVR_HELLO_A,
560 SSL3_ST_CR_SRVR_HELLO_B,
561 SSL3_MT_SERVER_HELLO,
565 if (!ok) return((int)n);
566 d=p=(unsigned char *)s->init_buf->data;
568 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
570 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
571 s->version=(s->version&0xff00)|p[1];
572 al=SSL_AD_PROTOCOL_VERSION;
577 /* load the server hello data */
578 /* load the server random */
579 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
582 /* get the session-id */
585 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
587 /* SSLref returns 16 :-( */
588 if (j < SSL2_SSL_SESSION_ID_LENGTH)
590 al=SSL_AD_ILLEGAL_PARAMETER;
591 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
595 if ((j != 0) && (j == s->session->session_id_length) &&
596 (memcmp(p,s->session->session_id,j) == 0))
598 else /* a miss or crap from the other end */
600 /* If we were trying for session-id reuse, make a new
601 * SSL_SESSION so we don't stuff up other people */
603 if (s->session->session_id_length > 0)
605 if (!ssl_get_new_session(s,0))
607 al=SSL_AD_INTERNAL_ERROR;
611 s->session->session_id_length=j;
612 memcpy(s->session->session_id,p,j); /* j could be 0 */
615 c=ssl_get_cipher_by_char(s,p);
619 al=SSL_AD_ILLEGAL_PARAMETER;
620 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
623 p+=ssl_put_cipher_by_char(s,NULL,NULL);
625 sk=ssl_get_ciphers_by_id(s);
626 i=sk_find(sk,(char *)c);
629 /* we did not say we would use this cipher */
630 al=SSL_AD_ILLEGAL_PARAMETER;
631 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
635 if (s->hit && (s->session->cipher != c))
638 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
640 al=SSL_AD_ILLEGAL_PARAMETER;
641 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
645 s->s3->tmp.new_cipher=c;
647 /* lets get the compression algorithm */
652 al=SSL_AD_ILLEGAL_PARAMETER;
653 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
659 /* wrong packet length */
660 al=SSL_AD_DECODE_ERROR;
661 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
667 ssl3_send_alert(s,SSL3_AL_FATAL,al);
672 static int ssl3_get_server_certificate(s)
676 unsigned long n,nc,llen,l;
678 unsigned char *p,*d,*q;
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_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_push(sk,(char *)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=(X509 *)sk_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);
815 if (x != NULL) X509_free(x);
816 if (sk != NULL) sk_pop_free(sk,X509_free);
820 static int ssl3_get_key_exchange(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;
997 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
999 al=SSL_AD_ILLEGAL_PARAMETER;
1000 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1006 al=SSL_AD_HANDSHAKE_FAILURE;
1007 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1012 /* p points to the next byte, there are 'n' bytes left */
1015 /* if it was signed, check the signature */
1020 j=EVP_PKEY_size(pkey);
1022 if ((i != n) || (n > j) || (n <= 0))
1024 /* wrong packet length */
1025 al=SSL_AD_DECODE_ERROR;
1026 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1031 if (pkey->type == EVP_PKEY_RSA)
1037 for (num=2; num > 0; num--)
1039 EVP_DigestInit(&md_ctx,(num == 2)
1040 ?s->ctx->md5:s->ctx->sha1);
1041 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1042 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1043 EVP_DigestUpdate(&md_ctx,param,param_len);
1044 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1048 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1052 al=SSL_AD_DECRYPT_ERROR;
1053 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1056 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1059 al=SSL_AD_DECRYPT_ERROR;
1060 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1067 if (pkey->type == EVP_PKEY_DSA)
1070 EVP_VerifyInit(&md_ctx,EVP_dss1());
1071 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1072 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1073 EVP_VerifyUpdate(&md_ctx,param,param_len);
1074 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1077 al=SSL_AD_DECRYPT_ERROR;
1078 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1085 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1091 /* still data left over */
1092 if (!(alg & SSL_aNULL))
1094 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1099 al=SSL_AD_DECODE_ERROR;
1100 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1107 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1112 static int ssl3_get_certificate_request(s)
1116 unsigned long n,nc,l;
1117 unsigned int llen,ctype_num,i;
1119 unsigned char *p,*d,*q;
1122 n=ssl3_get_message(s,
1123 SSL3_ST_CR_CERT_REQ_A,
1124 SSL3_ST_CR_CERT_REQ_B,
1126 #if defined(MSDOS) && !defined(WIN32)
1127 1024*30, /* 30k max cert list :-) */
1129 1024*100, /* 100k max cert list :-) */
1133 if (!ok) return((int)n);
1135 s->s3->tmp.cert_req=0;
1137 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1139 s->s3->tmp.reuse_message=1;
1143 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1145 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1146 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1150 /* TLS does not like anon-DH with client cert */
1151 if (s->version > SSL3_VERSION)
1153 l=s->s3->tmp.new_cipher->algorithms;
1156 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1157 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1162 d=p=(unsigned char *)s->init_buf->data;
1164 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1166 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1170 /* get the certificate types */
1172 if (ctype_num > SSL3_CT_NUMBER)
1173 ctype_num=SSL3_CT_NUMBER;
1174 for (i=0; i<ctype_num; i++)
1175 s->s3->tmp.ctype[i]= p[i];
1178 /* get the CA RDNs */
1183 out=fopen("/tmp/vsign.der","w");
1184 fwrite(p,1,llen,out);
1189 if ((llen+ctype_num+2+1) != n)
1191 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1192 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1196 for (nc=0; nc<llen; )
1199 if ((l+nc+2) > llen)
1201 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1202 goto cont; /* netscape bugs */
1203 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1204 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1210 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1212 /* If netscape tollerance is on, ignore errors */
1213 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1217 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1218 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1225 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1226 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1229 if (!sk_push(ca_sk,(char *)xn))
1231 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1245 /* we should setup a certficate to return.... */
1246 s->s3->tmp.cert_req=1;
1247 s->s3->tmp.ctype_num=ctype_num;
1248 if (s->s3->tmp.ca_names != NULL)
1249 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1250 s->s3->tmp.ca_names=ca_sk;
1255 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1259 static int ca_dn_cmp(a,b)
1262 return(X509_NAME_cmp(*a,*b));
1265 static int ssl3_get_server_done(s)
1271 n=ssl3_get_message(s,
1272 SSL3_ST_CR_SRVR_DONE_A,
1273 SSL3_ST_CR_SRVR_DONE_B,
1274 SSL3_MT_SERVER_DONE,
1275 30, /* should be very small, like 0 :-) */
1278 if (!ok) return((int)n);
1281 /* should contain no data */
1282 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1283 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1289 static int ssl3_send_client_key_exchange(s)
1292 unsigned char *p,*q,*d;
1295 EVP_PKEY *pkey=NULL;
1297 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1299 d=(unsigned char *)s->init_buf->data;
1302 l=s->s3->tmp.new_cipher->algorithms;
1308 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1310 if (s->session->cert->rsa_tmp != NULL)
1311 rsa=s->session->cert->rsa_tmp;
1314 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1315 if ((pkey == NULL) ||
1316 (pkey->type != EVP_PKEY_RSA) ||
1317 (pkey->pkey.rsa == NULL))
1319 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1325 tmp_buf[0]=s->version>>8;
1326 tmp_buf[1]=s->version&0xff;
1327 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1329 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1332 /* Fix buf for TLS and beyond */
1333 if (s->version > SSL3_VERSION)
1335 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1336 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1338 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1339 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1343 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1347 /* Fix buf for TLS and beyond */
1348 if (s->version > SSL3_VERSION)
1354 s->session->master_key_length=
1355 s->method->ssl3_enc->generate_master_secret(s,
1356 s->session->master_key,
1357 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1358 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1363 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1365 DH *dh_srvr,*dh_clnt;
1367 if (s->session->cert->dh_tmp != NULL)
1368 dh_srvr=s->session->cert->dh_tmp;
1371 /* we get them from the cert */
1372 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1377 /* generate a new random key */
1378 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1380 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1383 if (!DH_generate_key(dh_clnt))
1385 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1389 /* use the 'p' output buffer for the DH key, but
1390 * make sure to clear it out afterwards */
1392 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1396 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1400 /* generate master key from the result */
1401 s->session->master_key_length=
1402 s->method->ssl3_enc->generate_master_secret(s,
1403 s->session->master_key,p,n);
1407 /* send off the data */
1408 n=BN_num_bytes(dh_clnt->pub_key);
1410 BN_bn2bin(dh_clnt->pub_key,p);
1415 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1420 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1425 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1428 s->state=SSL3_ST_CW_KEY_EXCH_B;
1429 /* number of bytes to write */
1434 /* SSL3_ST_CW_KEY_EXCH_B */
1435 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1440 static int ssl3_send_client_verify(s)
1443 unsigned char *p,*d;
1444 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1452 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1454 d=(unsigned char *)s->init_buf->data;
1456 pkey=s->cert->key->privatekey;
1458 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1459 &(data[MD5_DIGEST_LENGTH]));
1462 if (pkey->type == EVP_PKEY_RSA)
1464 s->method->ssl3_enc->cert_verify_mac(s,
1465 &(s->s3->finish_dgst1),&(data[0]));
1466 i=RSA_private_encrypt(
1467 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1468 data,&(p[2]),pkey->pkey.rsa,
1472 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1481 if (pkey->type == EVP_PKEY_DSA)
1483 if (!DSA_sign(pkey->save_type,
1484 &(data[MD5_DIGEST_LENGTH]),
1485 SHA_DIGEST_LENGTH,&(p[2]),
1486 (unsigned int *)&j,pkey->pkey.dsa))
1488 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1497 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1500 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1503 s->init_num=(int)n+4;
1506 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1511 static int ssl3_send_client_certificate(s)
1515 EVP_PKEY *pkey=NULL;
1519 if (s->state == SSL3_ST_CW_CERT_A)
1521 if ((s->cert == NULL) ||
1522 (s->cert->key->x509 == NULL) ||
1523 (s->cert->key->privatekey == NULL))
1524 s->state=SSL3_ST_CW_CERT_B;
1526 s->state=SSL3_ST_CW_CERT_C;
1529 /* We need to get a client cert */
1530 if (s->state == SSL3_ST_CW_CERT_B)
1532 /* If we get an error, we need to
1533 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1534 * We then get retied later */
1536 if (s->ctx->client_cert_cb != NULL)
1537 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1540 s->rwstate=SSL_X509_LOOKUP;
1543 s->rwstate=SSL_NOTHING;
1544 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1546 s->state=SSL3_ST_CW_CERT_B;
1547 if ( !SSL_use_certificate(s,x509) ||
1548 !SSL_use_PrivateKey(s,pkey))
1554 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1557 if (x509 != NULL) X509_free(x509);
1558 if (pkey != NULL) EVP_PKEY_free(pkey);
1561 if (s->version == SSL3_VERSION)
1563 s->s3->tmp.cert_req=0;
1564 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1569 s->s3->tmp.cert_req=2;
1573 /* Ok, we have a cert */
1574 s->state=SSL3_ST_CW_CERT_C;
1577 if (s->state == SSL3_ST_CW_CERT_C)
1579 s->state=SSL3_ST_CW_CERT_D;
1580 l=ssl3_output_cert_chain(s,
1581 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1585 /* SSL3_ST_CW_CERT_D */
1586 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1589 #define has_bits(i,m) (((i)&(m)) == (m))
1591 static int ssl3_check_cert_and_algorithm(s)
1596 EVP_PKEY *pkey=NULL;
1605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1609 algs=s->s3->tmp.new_cipher->algorithms;
1611 /* we don't have a certificate */
1612 if (algs & (SSL_aDH|SSL_aNULL))
1615 rsa=s->session->cert->rsa_tmp;
1616 dh=s->session->cert->dh_tmp;
1618 /* This is the passed certificate */
1621 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1622 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1625 /* Check that we have a certificate if we require one */
1626 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1628 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1632 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1634 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1639 if ((algs & SSL_kRSA) &&
1640 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1642 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1646 else if ((algs & SSL_kEDH) &&
1647 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1649 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1652 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1658 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1660 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1666 if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP))
1669 if (algs & SSL_kRSA)
1671 if ((rsa == NULL) || (RSA_size(rsa) > 512))
1673 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1680 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1682 if ((dh == NULL) || (DH_size(dh) > 512))
1684 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1691 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1697 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);