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))
483 if (!ssl_get_new_session(s,0))
486 /* else use the pre-loaded session */
488 p=s->s3->client_random;
489 Time=time(NULL); /* Time */
491 RAND_bytes(&(p[4]),SSL3_RANDOM_SIZE-sizeof(Time));
493 /* Do the message type and length last */
496 *(p++)=s->version>>8;
497 *(p++)=s->version&0xff;
500 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
507 i=s->session->session_id_length;
511 memcpy(p,s->session->session_id,i);
515 /* Ciphers supported */
516 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
519 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
525 /* hardwire in the NULL compression algorithm. */
531 *(d++)=SSL3_MT_CLIENT_HELLO;
534 s->state=SSL3_ST_CW_CLNT_HELLO_B;
535 /* number of bytes to write */
540 /* SSL3_ST_CW_CLNT_HELLO_B */
541 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
546 static int ssl3_get_server_hello(s)
556 n=ssl3_get_message(s,
557 SSL3_ST_CR_SRVR_HELLO_A,
558 SSL3_ST_CR_SRVR_HELLO_B,
559 SSL3_MT_SERVER_HELLO,
563 if (!ok) return((int)n);
564 d=p=(unsigned char *)s->init_buf->data;
566 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
568 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
569 s->version=(s->version&0xff00)|p[1];
570 al=SSL_AD_PROTOCOL_VERSION;
575 /* load the server hello data */
576 /* load the server random */
577 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
580 /* get the session-id */
583 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
585 /* SSLref returns 16 :-( */
586 if (j < SSL2_SSL_SESSION_ID_LENGTH)
588 al=SSL_AD_ILLEGAL_PARAMETER;
589 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
593 if ((j != 0) && (j == s->session->session_id_length) &&
594 (memcmp(p,s->session->session_id,j) == 0))
596 else /* a miss or crap from the other end */
598 /* If we were trying for session-id reuse, make a new
599 * SSL_SESSION so we don't stuff up other people */
601 if (s->session->session_id_length > 0)
603 if (!ssl_get_new_session(s,0))
605 al=SSL_AD_INTERNAL_ERROR;
609 s->session->session_id_length=j;
610 memcpy(s->session->session_id,p,j); /* j could be 0 */
613 c=ssl_get_cipher_by_char(s,p);
617 al=SSL_AD_ILLEGAL_PARAMETER;
618 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
621 p+=ssl_put_cipher_by_char(s,NULL,NULL);
623 sk=ssl_get_ciphers_by_id(s);
624 i=sk_find(sk,(char *)c);
627 /* we did not say we would use this cipher */
628 al=SSL_AD_ILLEGAL_PARAMETER;
629 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
633 if (s->hit && (s->session->cipher != c))
636 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
638 al=SSL_AD_ILLEGAL_PARAMETER;
639 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
643 s->s3->tmp.new_cipher=c;
645 /* lets get the compression algorithm */
649 al=SSL_AD_ILLEGAL_PARAMETER;
650 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
656 /* wrong packet length */
657 al=SSL_AD_DECODE_ERROR;
658 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
664 ssl3_send_alert(s,SSL3_AL_FATAL,al);
669 static int ssl3_get_server_certificate(s)
673 unsigned long n,nc,llen,l;
675 unsigned char *p,*d,*q;
680 n=ssl3_get_message(s,
684 #if defined(MSDOS) && !defined(WIN32)
685 1024*30, /* 30k max cert list :-) */
687 1024*100, /* 100k max cert list :-) */
691 if (!ok) return((int)n);
693 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
695 s->s3->tmp.reuse_message=1;
699 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
701 al=SSL_AD_UNEXPECTED_MESSAGE;
702 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
705 d=p=(unsigned char *)s->init_buf->data;
707 if ((sk=sk_new_null()) == NULL)
709 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
716 al=SSL_AD_DECODE_ERROR;
717 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
720 for (nc=0; nc<llen; )
725 al=SSL_AD_DECODE_ERROR;
726 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
731 x=d2i_X509(NULL,&q,l);
734 al=SSL_AD_BAD_CERTIFICATE;
735 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
740 al=SSL_AD_DECODE_ERROR;
741 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
744 if (!sk_push(sk,(char *)x))
746 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
754 i=ssl_verify_cert_chain(s,sk);
755 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
757 al=ssl_verify_alarm_type(s->verify_result);
758 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
763 if (c == NULL) goto err;
765 if (s->session->cert) ssl_cert_free(s->session->cert);
769 x=(X509 *)sk_value(sk,0);
772 pkey=X509_get_pubkey(x);
774 if (EVP_PKEY_missing_parameters(pkey))
778 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
782 i=ssl_cert_type(x,pkey);
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
792 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
793 if (c->pkeys[i].x509 != NULL)
794 X509_free(c->pkeys[i].x509);
796 c->key= &(c->pkeys[i]);
798 if ((s->session != NULL) && (s->session->peer != NULL))
799 X509_free(s->session->peer);
800 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
809 ssl3_send_alert(s,SSL3_AL_FATAL,al);
812 if (x != NULL) X509_free(x);
813 if (sk != NULL) sk_pop_free(sk,X509_free);
817 static int ssl3_get_key_exchange(s)
821 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
824 unsigned char *param,*p;
825 int al,i,j,param_len,ok;
833 n=ssl3_get_message(s,
834 SSL3_ST_CR_KEY_EXCH_A,
835 SSL3_ST_CR_KEY_EXCH_B,
840 if (!ok) return((int)n);
842 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
844 s->s3->tmp.reuse_message=1;
848 param=p=(unsigned char *)s->init_buf->data;
850 if (s->session->cert != NULL)
853 if (s->session->cert->rsa_tmp != NULL)
855 RSA_free(s->session->cert->rsa_tmp);
856 s->session->cert->rsa_tmp=NULL;
860 if (s->session->cert->dh_tmp)
862 DH_free(s->session->cert->dh_tmp);
863 s->session->cert->dh_tmp=NULL;
869 s->session->cert=ssl_cert_new();
873 alg=s->s3->tmp.new_cipher->algorithms;
878 if ((rsa=RSA_new()) == NULL)
880 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
887 al=SSL_AD_DECODE_ERROR;
888 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
891 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
902 al=SSL_AD_DECODE_ERROR;
903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
906 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
908 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
914 /* s->session->cert->rsa_tmp=rsa;*/
915 /* this should be because we are using an export cipher */
917 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
920 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
923 s->session->cert->rsa_tmp=rsa;
930 if ((dh=DH_new()) == NULL)
932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
939 al=SSL_AD_DECODE_ERROR;
940 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
943 if (!(dh->p=BN_bin2bn(p,i,NULL)))
945 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
954 al=SSL_AD_DECODE_ERROR;
955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
958 if (!(dh->g=BN_bin2bn(p,i,NULL)))
960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
969 al=SSL_AD_DECODE_ERROR;
970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
973 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
975 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
983 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
988 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
990 /* else anonymous DH, so no certificate or pkey. */
992 s->session->cert->dh_tmp=dh;
994 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
996 al=SSL_AD_ILLEGAL_PARAMETER;
997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1002 /* p points to the next byte, there are 'n' bytes left */
1005 /* if it was signed, check the signature */
1010 j=EVP_PKEY_size(pkey);
1012 if ((i != n) || (n > j) || (n <= 0))
1014 /* wrong packet length */
1015 al=SSL_AD_DECODE_ERROR;
1016 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1021 if (pkey->type == EVP_PKEY_RSA)
1027 for (num=2; num > 0; num--)
1029 EVP_DigestInit(&md_ctx,(num == 2)
1030 ?s->ctx->md5:s->ctx->sha1);
1031 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1032 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1033 EVP_DigestUpdate(&md_ctx,param,param_len);
1034 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1038 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1042 al=SSL_AD_DECRYPT_ERROR;
1043 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1046 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1049 al=SSL_AD_DECRYPT_ERROR;
1050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1057 if (pkey->type == EVP_PKEY_DSA)
1060 EVP_VerifyInit(&md_ctx,EVP_dss1());
1061 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1062 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_VerifyUpdate(&md_ctx,param,param_len);
1064 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1067 al=SSL_AD_DECRYPT_ERROR;
1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1075 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1081 /* still data left over */
1082 if (!(alg & SSL_aNULL))
1084 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1089 al=SSL_AD_DECODE_ERROR;
1090 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1097 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1102 static int ssl3_get_certificate_request(s)
1106 unsigned long n,nc,l;
1107 unsigned int llen,ctype_num,i;
1109 unsigned char *p,*d,*q;
1112 n=ssl3_get_message(s,
1113 SSL3_ST_CR_CERT_REQ_A,
1114 SSL3_ST_CR_CERT_REQ_B,
1116 #if defined(MSDOS) && !defined(WIN32)
1117 1024*30, /* 30k max cert list :-) */
1119 1024*100, /* 100k max cert list :-) */
1123 if (!ok) return((int)n);
1125 s->s3->tmp.cert_req=0;
1127 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1129 s->s3->tmp.reuse_message=1;
1133 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1135 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1140 /* TLS does not like anon-DH with client cert */
1141 if (s->version > SSL3_VERSION)
1143 l=s->s3->tmp.new_cipher->algorithms;
1146 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1147 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1152 d=p=(unsigned char *)s->init_buf->data;
1154 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1156 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1160 /* get the certificate types */
1162 if (ctype_num > SSL3_CT_NUMBER)
1163 ctype_num=SSL3_CT_NUMBER;
1164 for (i=0; i<ctype_num; i++)
1165 s->s3->tmp.ctype[i]= p[i];
1168 /* get the CA RDNs */
1170 if ((llen+ctype_num+2+1) != n)
1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1177 for (nc=0; nc<llen; )
1180 if ((l+nc+2) > llen)
1182 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1183 goto cont; /* netscape bugs */
1184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1191 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1193 /* If netscape tollerance is on, ignore errors */
1194 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1198 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1199 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1206 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1207 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1210 if (!sk_push(ca_sk,(char *)xn))
1212 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1226 /* we should setup a certficate to return.... */
1227 s->s3->tmp.cert_req=1;
1228 s->s3->tmp.ctype_num=ctype_num;
1229 if (s->s3->tmp.ca_names != NULL)
1230 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1231 s->s3->tmp.ca_names=ca_sk;
1236 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1240 static int ca_dn_cmp(a,b)
1243 return(X509_NAME_cmp(*a,*b));
1246 static int ssl3_get_server_done(s)
1252 n=ssl3_get_message(s,
1253 SSL3_ST_CR_SRVR_DONE_A,
1254 SSL3_ST_CR_SRVR_DONE_B,
1255 SSL3_MT_SERVER_DONE,
1256 30, /* should be very small, like 0 :-) */
1259 if (!ok) return((int)n);
1262 /* should contain no data */
1263 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1264 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1270 static int ssl3_send_client_key_exchange(s)
1273 unsigned char *p,*q,*d;
1276 EVP_PKEY *pkey=NULL;
1278 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1280 d=(unsigned char *)s->init_buf->data;
1283 l=s->s3->tmp.new_cipher->algorithms;
1289 unsigned char tmp_buf[48];
1291 if (s->session->cert->rsa_tmp != NULL)
1292 rsa=s->session->cert->rsa_tmp;
1295 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1296 if ((pkey == NULL) ||
1297 (pkey->type != EVP_PKEY_RSA) ||
1298 (pkey->pkey.rsa == NULL))
1300 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1306 tmp_buf[0]=s->version>>8;
1307 tmp_buf[1]=s->version&0xff;
1308 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1310 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1313 /* Fix buf for TLS and beyond */
1314 if (s->version > SSL3_VERSION)
1316 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1317 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1320 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1324 /* Fix buf for TLS and beyond */
1325 if (s->version > SSL3_VERSION)
1331 s->session->master_key_length=
1332 s->method->ssl3_enc->generate_master_secret(s,
1333 s->session->master_key,
1335 memset(tmp_buf,0,48);
1340 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1342 DH *dh_srvr,*dh_clnt;
1344 if (s->session->cert->dh_tmp != NULL)
1345 dh_srvr=s->session->cert->dh_tmp;
1348 /* we get them from the cert */
1349 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1354 /* generate a new random key */
1355 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1357 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1360 if (!DH_generate_key(dh_clnt))
1362 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1366 /* use the 'p' output buffer for the DH key, but
1367 * make sure to clear it out afterwards */
1369 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1377 /* generate master key from the result */
1378 s->session->master_key_length=
1379 s->method->ssl3_enc->generate_master_secret(s,
1380 s->session->master_key,p,n);
1384 /* send off the data */
1385 n=BN_num_bytes(dh_clnt->pub_key);
1387 BN_bn2bin(dh_clnt->pub_key,p);
1392 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1397 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1398 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1402 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1405 s->state=SSL3_ST_CW_KEY_EXCH_B;
1406 /* number of bytes to write */
1411 /* SSL3_ST_CW_KEY_EXCH_B */
1412 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1417 static int ssl3_send_client_verify(s)
1420 unsigned char *p,*d;
1421 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1429 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1431 d=(unsigned char *)s->init_buf->data;
1433 pkey=s->cert->key->privatekey;
1435 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1436 &(data[MD5_DIGEST_LENGTH]));
1439 if (pkey->type == EVP_PKEY_RSA)
1441 s->method->ssl3_enc->cert_verify_mac(s,
1442 &(s->s3->finish_dgst1),&(data[0]));
1443 i=RSA_private_encrypt(
1444 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1445 data,&(p[2]),pkey->pkey.rsa,
1449 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1458 if (pkey->type == EVP_PKEY_DSA)
1460 if (!DSA_sign(pkey->save_type,
1461 &(data[MD5_DIGEST_LENGTH]),
1462 SHA_DIGEST_LENGTH,&(p[2]),
1463 (unsigned int *)&j,pkey->pkey.dsa))
1465 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1474 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1477 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1480 s->init_num=(int)n+4;
1483 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1488 static int ssl3_send_client_certificate(s)
1492 EVP_PKEY *pkey=NULL;
1496 if (s->state == SSL3_ST_CW_CERT_A)
1498 if ((s->cert == NULL) ||
1499 (s->cert->key->x509 == NULL) ||
1500 (s->cert->key->privatekey == NULL))
1501 s->state=SSL3_ST_CW_CERT_B;
1503 s->state=SSL3_ST_CW_CERT_C;
1506 /* We need to get a client cert */
1507 if (s->state == SSL3_ST_CW_CERT_B)
1509 /* If we get an error, we need to
1510 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1511 * We then get retied later */
1513 if (s->ctx->client_cert_cb != NULL)
1514 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1517 s->rwstate=SSL_X509_LOOKUP;
1520 s->rwstate=SSL_NOTHING;
1521 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1523 s->state=SSL3_ST_CW_CERT_B;
1524 if ( !SSL_use_certificate(s,x509) ||
1525 !SSL_use_PrivateKey(s,pkey))
1531 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1534 if (x509 != NULL) X509_free(x509);
1535 if (pkey != NULL) EVP_PKEY_free(pkey);
1538 if (s->version == SSL3_VERSION)
1540 s->s3->tmp.cert_req=0;
1541 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1546 s->s3->tmp.cert_req=2;
1550 /* Ok, we have a cert */
1551 s->state=SSL3_ST_CW_CERT_C;
1554 if (s->state == SSL3_ST_CW_CERT_C)
1556 s->state=SSL3_ST_CW_CERT_D;
1557 l=ssl3_output_cert_chain(s,
1558 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1562 /* SSL3_ST_CW_CERT_D */
1563 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1566 #define has_bits(i,m) (((i)&(m)) == (m))
1568 static int ssl3_check_cert_and_algorithm(s)
1573 EVP_PKEY *pkey=NULL;
1582 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1586 algs=s->s3->tmp.new_cipher->algorithms;
1588 /* we don't have a certificate */
1589 if (algs & (SSL_aDH|SSL_aNULL))
1592 rsa=s->session->cert->rsa_tmp;
1593 dh=s->session->cert->dh_tmp;
1595 /* This is the passed certificate */
1598 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1599 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1602 /* Check that we have a certificate if we require one */
1603 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1609 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1611 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1616 if ((algs & SSL_kRSA) &&
1617 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1619 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1623 else if ((algs & SSL_kEDH) &&
1624 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1626 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1629 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1635 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1637 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1643 if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP))
1646 if (algs & SSL_kRSA)
1648 if ((rsa == NULL) || (RSA_size(rsa) > 512))
1650 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1657 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1659 if ((dh == NULL) || (DH_size(dh) > 512))
1661 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1668 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1674 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);