2 /* Copyright (C) 1995-1997 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)
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;
162 case SSL_ST_BEFORE|SSL_ST_CONNECT:
163 case SSL_ST_OK|SSL_ST_CONNECT:
165 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
168 s->type=SSL_ST_CONNECT;
170 if (s->init_buf == NULL)
172 if ((buf=BUF_MEM_new()) == NULL)
177 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
185 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
187 /* setup buffing BIO */
190 bbio=BIO_new(BIO_f_buffer());
193 SSLerr(SSL_F_SSL3_CONNECT,ERR_LIB_BUF);
203 if (!BIO_set_write_buffer_size(bbio,16*1024))
205 SSLerr(SSL_F_SSL3_CONNECT,ERR_LIB_BUF);
210 /* don't push the buffering BIO quite yet */
212 ssl3_init_finished_mac(s);
214 s->state=SSL3_ST_CW_CLNT_HELLO_A;
215 s->ctx->sess_connect++;
219 case SSL3_ST_CW_CLNT_HELLO_A:
220 case SSL3_ST_CW_CLNT_HELLO_B:
223 ret=ssl3_client_hello(s);
224 if (ret <= 0) goto end;
225 s->state=SSL3_ST_CR_SRVR_HELLO_A;
228 /* turn on buffering for the next lot of output */
229 s->wbio=BIO_push(s->bbio,s->wbio);
233 case SSL3_ST_CR_SRVR_HELLO_A:
234 case SSL3_ST_CR_SRVR_HELLO_B:
235 ret=ssl3_get_server_hello(s);
236 if (ret <= 0) goto end;
238 s->state=SSL3_ST_CR_FINISHED_A;
240 s->state=SSL3_ST_CR_CERT_A;
244 case SSL3_ST_CR_CERT_A:
245 case SSL3_ST_CR_CERT_B:
246 /* Check if it is anon DH */
247 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
249 ret=ssl3_get_server_certificate(s);
250 if (ret <= 0) goto end;
254 s->state=SSL3_ST_CR_KEY_EXCH_A;
258 case SSL3_ST_CR_KEY_EXCH_A:
259 case SSL3_ST_CR_KEY_EXCH_B:
260 ret=ssl3_get_key_exchange(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_CR_CERT_REQ_A;
265 /* at this point we check that we have the
266 * required stuff from the server */
267 if (!ssl3_check_cert_and_algorithm(s))
274 case SSL3_ST_CR_CERT_REQ_A:
275 case SSL3_ST_CR_CERT_REQ_B:
276 ret=ssl3_get_certificate_request(s);
277 if (ret <= 0) goto end;
278 s->state=SSL3_ST_CR_SRVR_DONE_A;
282 case SSL3_ST_CR_SRVR_DONE_A:
283 case SSL3_ST_CR_SRVR_DONE_B:
284 ret=ssl3_get_server_done(s);
285 if (ret <= 0) goto end;
286 if (s->s3->tmp.cert_req)
287 s->state=SSL3_ST_CW_CERT_A;
289 s->state=SSL3_ST_CW_KEY_EXCH_A;
294 case SSL3_ST_CW_CERT_A:
295 case SSL3_ST_CW_CERT_B:
296 case SSL3_ST_CW_CERT_C:
297 ret=ssl3_send_client_certificate(s);
298 if (ret <= 0) goto end;
299 s->state=SSL3_ST_CW_KEY_EXCH_A;
303 case SSL3_ST_CW_KEY_EXCH_A:
304 case SSL3_ST_CW_KEY_EXCH_B:
305 ret=ssl3_send_client_key_exchange(s);
306 if (ret <= 0) goto end;
307 l=s->s3->tmp.new_cipher->algorithms;
308 /* EAY EAY EAY need to check for DH fix cert
310 if ((s->s3->tmp.cert_req) && 1)
312 s->state=SSL3_ST_CW_CERT_VRFY_A;
316 s->state=SSL3_ST_CW_CHANGE_A;
317 s->s3->change_cipher_spec=0;
323 case SSL3_ST_CW_CERT_VRFY_A:
324 case SSL3_ST_CW_CERT_VRFY_B:
325 ret=ssl3_send_client_verify(s);
326 if (ret <= 0) goto end;
327 s->state=SSL3_ST_CW_CHANGE_A;
329 s->s3->change_cipher_spec=0;
332 case SSL3_ST_CW_CHANGE_A:
333 case SSL3_ST_CW_CHANGE_B:
334 ret=ssl3_send_change_cipher_spec(s,
335 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
336 if (ret <= 0) goto end;
337 s->state=SSL3_ST_CW_FINISHED_A;
340 s->session->cipher=s->s3->tmp.new_cipher;
341 if (!ssl3_setup_key_block(s))
347 if (!ssl3_change_cipher_state(s,
348 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
356 case SSL3_ST_CW_FINISHED_A:
357 case SSL3_ST_CW_FINISHED_B:
358 ret=ssl3_send_finished(s,
359 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
360 &(ssl3_client_finished_const[0]));
361 if (ret <= 0) goto end;
362 s->state=SSL3_ST_CW_FLUSH;
365 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
368 s->s3->tmp.next_state=SSL_ST_OK;
369 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
372 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
373 s->s3->delay_buf_pop_ret=0;
378 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
383 case SSL3_ST_CR_FINISHED_A:
384 case SSL3_ST_CR_FINISHED_B:
386 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
387 SSL3_ST_CR_FINISHED_B,
388 &(ssl3_server_finished_const[0]));
389 if (ret <= 0) goto end;
392 s->state=SSL3_ST_CW_CHANGE_A;
398 case SSL3_ST_CW_FLUSH:
399 /* number of bytes to be flushed */
400 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
403 s->rwstate=SSL_WRITING;
404 num1=BIO_flush(s->wbio);
405 if (num1 <= 0) { ret= -1; goto end; }
406 s->rwstate=SSL_NOTHING;
409 s->state=s->s3->tmp.next_state;
413 /* clean a few things up */
414 ssl3_cleanup_key_block(s);
416 BUF_MEM_free(s->init_buf);
419 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
421 /* remove buffering */
422 under=BIO_pop(s->wbio);
431 /* else do it later */
436 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
440 s->handshake_func=ssl3_connect;
441 s->ctx->sess_connect_good++;
443 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
449 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
455 /* did we do anything */
456 if (!s->s3->tmp.reuse_message && !skip)
458 if (s->debug) BIO_flush(s->wbio);
460 if ((cb != NULL) && (s->state != state))
464 cb(s,SSL_CB_CONNECT_LOOP,1);
472 cb(s,SSL_CB_CONNECT_EXIT,ret);
478 static int ssl3_client_hello(s)
484 unsigned long Time,l;
486 buf=(unsigned char *)s->init_buf->data;
487 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
489 if ((s->session == NULL) ||
490 (s->session->ssl_version != s->version))
492 if (!ssl_get_new_session(s,0))
495 /* else use the pre-loaded session */
497 p=s->s3->client_random;
498 Time=time(NULL); /* Time */
500 RAND_bytes(&(p[4]),SSL3_RANDOM_SIZE-sizeof(Time));
502 /* Do the message type and length last */
505 *(p++)=SSL3_VERSION_MAJOR;
506 *(p++)=SSL3_VERSION_MINOR;
509 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
516 i=s->session->session_id_length;
520 memcpy(p,s->session->session_id,i);
524 /* Ciphers supported */
525 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
528 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
534 /* hardwire in the NULL compression algorithm. */
540 *(d++)=SSL3_MT_CLIENT_HELLO;
543 s->state=SSL3_ST_CW_CLNT_HELLO_B;
544 /* number of bytes to write */
549 /* SSL3_ST_CW_CLNT_HELLO_B */
550 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
555 static int ssl3_get_server_hello(s)
565 n=ssl3_get_message(s,
566 SSL3_ST_CR_SRVR_HELLO_A,
567 SSL3_ST_CR_SRVR_HELLO_B,
568 SSL3_MT_SERVER_HELLO,
572 if (!ok) return((int)n);
573 d=p=(unsigned char *)s->init_buf->data;
575 if ((p[0] != SSL3_VERSION_MAJOR) && (p[1] != SSL3_VERSION_MINOR))
577 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
582 /* load the server hello data */
583 /* load the server random */
584 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
587 /* get the session-id */
590 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
592 /* SSLref returns 16 :-( */
593 if (j < SSL2_SSL_SESSION_ID_LENGTH)
595 al=SSL3_AD_ILLEGAL_PARAMETER;
596 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
603 memset(s->session->session_id,0,SSL_MAX_SSL_SESSION_ID_LENGTH);
604 s->session->session_id_length=0;
606 else if ((j == s->session->session_id_length) &&
607 (memcmp(p,s->session->session_id,j) == 0))
611 memcpy(s->session->session_id,p,j);
612 s->session->session_id_length=j;
616 c=ssl_get_cipher_by_char(s,p);
620 al=SSL3_AD_HANDSHAKE_FAILURE;
621 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
624 p+=ssl_put_cipher_by_char(s,NULL,NULL);
626 sk=ssl_get_ciphers_by_id(s);
627 i=sk_find(sk,(char *)c);
630 /* we did not say we would use this cipher */
631 al=SSL3_AD_ILLEGAL_PARAMETER;
632 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
636 if (s->hit && (s->session->cipher != c))
638 if (!(s->ctx->options &
639 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
641 al=SSL3_AD_ILLEGAL_PARAMETER;
642 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
646 s->s3->tmp.new_cipher=c;
648 /* lets get the compression algorithm */
652 al=SSL3_AD_HANDSHAKE_FAILURE;
653 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
659 /* wrong packet length */
660 al=SSL3_AD_ILLEGAL_PARAMETER;
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=SSL3_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=SSL3_AD_ILLEGAL_PARAMETER;
720 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
723 for (nc=0; nc<llen; )
728 al=SSL3_AD_ILLEGAL_PARAMETER;
729 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
734 x=d2i_X509(NULL,&q,l);
737 al=SSL3_AD_ILLEGAL_PARAMETER;
738 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
743 al=SSL3_AD_ILLEGAL_PARAMETER;
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 (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);
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);
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;
834 n=ssl3_get_message(s,
835 SSL3_ST_CR_KEY_EXCH_A,
836 SSL3_ST_CR_KEY_EXCH_B,
841 if (!ok) return((int)n);
843 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
845 s->s3->tmp.reuse_message=1;
849 param=p=(unsigned char *)s->init_buf->data;
851 if (s->session->cert != NULL)
854 if (s->session->cert->rsa_tmp != NULL)
856 RSA_free(s->session->cert->rsa_tmp);
857 s->session->cert->rsa_tmp=NULL;
861 if (s->session->cert->dh_tmp)
863 DH_free(s->session->cert->dh_tmp);
864 s->session->cert->dh_tmp=NULL;
870 s->session->cert=ssl_cert_new();
874 alg=s->s3->tmp.new_cipher->algorithms;
879 if ((rsa=RSA_new()) == NULL)
881 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
888 al=SSL3_AD_ILLEGAL_PARAMETER;
889 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
892 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
894 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
903 al=SSL3_AD_ILLEGAL_PARAMETER;
904 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
907 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
909 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
915 /* s->session->cert->rsa_tmp=rsa;*/
916 /* this should be because we are using an export cipher */
918 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
921 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
924 s->session->cert->rsa_tmp=rsa;
931 if ((dh=DH_new()) == NULL)
933 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
940 al=SSL3_AD_ILLEGAL_PARAMETER;
941 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
944 if (!(dh->p=BN_bin2bn(p,i,NULL)))
946 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
955 al=SSL3_AD_ILLEGAL_PARAMETER;
956 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
959 if (!(dh->g=BN_bin2bn(p,i,NULL)))
961 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
970 al=SSL3_AD_ILLEGAL_PARAMETER;
971 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
974 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
976 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
984 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
989 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
991 /* else anonymous DH, so no certificate or pkey. */
993 s->session->cert->dh_tmp=dh;
995 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
997 al=SSL3_AD_HANDSHAKE_FAILURE;
998 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1003 /* p points to the next byte, there are 'n' bytes left */
1006 /* if it was signed, check the signature */
1011 j=EVP_PKEY_size(pkey);
1013 if ((i != n) || (n > j) || (n <= 0))
1015 /* wrong packet length */
1016 al=SSL3_AD_ILLEGAL_PARAMETER;
1017 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1022 if (pkey->type == EVP_PKEY_RSA)
1028 for (num=2; num > 0; num--)
1030 EVP_DigestInit(&md_ctx,(num == 2)?EVP_md5():EVP_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=SSL3_AD_ILLEGAL_PARAMETER;
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=SSL3_AD_ILLEGAL_PARAMETER;
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=SSL3_AD_ILLEGAL_PARAMETER;
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=SSL3_AD_ILLEGAL_PARAMETER;
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)
1107 unsigned int llen,l,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,SSL3_AD_UNEXPECTED_MESSAGE);
1136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1140 d=p=(unsigned char *)s->init_buf->data;
1142 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1144 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1148 /* get the certificate types */
1150 if (ctype_num > SSL3_CT_NUMBER)
1151 ctype_num=SSL3_CT_NUMBER;
1152 for (i=0; i<ctype_num; i++)
1153 s->s3->tmp.ctype[i]= p[i];
1156 /* get the CA RDNs */
1158 if ((llen+ctype_num+2+1) != n)
1160 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_ILLEGAL_PARAMETER);
1161 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1165 for (nc=0; nc<llen; )
1168 if ((l+nc+2) > llen)
1170 if ((s->ctx->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1171 goto cont; /* netscape bugs */
1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_ILLEGAL_PARAMETER);
1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1179 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1181 /* If netscape tollerance is on, ignore errors */
1182 if (s->ctx->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1186 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_ILLEGAL_PARAMETER);
1187 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1194 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_ILLEGAL_PARAMETER);
1195 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1198 if (!sk_push(ca_sk,(char *)xn))
1200 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1214 /* we should setup a certficate to return.... */
1215 s->s3->tmp.cert_req=1;
1216 s->s3->tmp.ctype_num=ctype_num;
1217 if (s->s3->tmp.ca_names != NULL)
1218 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1219 s->s3->tmp.ca_names=ca_sk;
1224 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1228 static int ca_dn_cmp(a,b)
1231 return(X509_NAME_cmp(*a,*b));
1234 static int ssl3_get_server_done(s)
1240 n=ssl3_get_message(s,
1241 SSL3_ST_CR_SRVR_DONE_A,
1242 SSL3_ST_CR_SRVR_DONE_B,
1243 SSL3_MT_SERVER_DONE,
1244 30, /* should be very small, like 0 :-) */
1247 if (!ok) return((int)n);
1250 /* should contain no data */
1251 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_ILLEGAL_PARAMETER);
1252 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1258 static int ssl3_send_client_key_exchange(s)
1261 unsigned char *p,*d;
1264 EVP_PKEY *pkey=NULL;
1266 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1268 d=(unsigned char *)s->init_buf->data;
1271 l=s->s3->tmp.new_cipher->algorithms;
1277 unsigned char tmp_buf[48];
1279 if (s->session->cert->rsa_tmp != NULL)
1280 rsa=s->session->cert->rsa_tmp;
1283 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1284 if ((pkey == NULL) ||
1285 (pkey->type != EVP_PKEY_RSA) ||
1286 (pkey->pkey.rsa == NULL))
1288 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1294 tmp_buf[0]=SSL3_VERSION_MAJOR;
1295 tmp_buf[1]=SSL3_VERSION_MINOR;
1296 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1298 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1300 n=RSA_public_encrypt(48,tmp_buf,p,rsa,
1304 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1308 s->session->master_key_length=
1309 ssl3_generate_master_secret(s,
1310 s->session->master_key,
1312 memset(tmp_buf,0,48);
1317 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1319 DH *dh_srvr,*dh_clnt;
1321 if (s->session->cert->dh_tmp != NULL)
1322 dh_srvr=s->session->cert->dh_tmp;
1325 /* we get them from the cert */
1326 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_HANDSHAKE_FAILURE);
1327 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1331 /* generate a new random key */
1332 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1334 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1337 if (!DH_generate_key(dh_clnt))
1339 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1343 /* use the 'p' output buffer for the DH key, but
1344 * make sure to clear it out afterwards */
1345 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1348 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1352 /* generate master key from the result */
1353 s->session->master_key_length=
1354 ssl3_generate_master_secret(s,
1355 s->session->master_key,p,n);
1359 /* send off the data */
1360 n=BN_num_bytes(dh_clnt->pub_key);
1362 BN_bn2bin(dh_clnt->pub_key,p);
1367 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1372 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_HANDSHAKE_FAILURE);
1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1377 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1380 s->state=SSL3_ST_CW_KEY_EXCH_B;
1381 /* number of bytes to write */
1386 /* SSL3_ST_CW_KEY_EXCH_B */
1387 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1392 static int ssl3_send_client_verify(s)
1395 unsigned char *p,*d;
1396 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1401 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1403 d=(unsigned char *)s->init_buf->data;
1405 pkey=s->cert->key->privatekey;
1407 ssl3_final_finish_mac(s,&(s->s3->finish_dgst2),
1408 NULL,&(data[MD5_DIGEST_LENGTH]));
1411 if (pkey->type == EVP_PKEY_RSA)
1413 ssl3_final_finish_mac(s,&(s->s3->finish_dgst1),
1415 i=RSA_private_encrypt(
1416 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1417 data,&(p[2]),pkey->pkey.rsa,
1421 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1430 if (pkey->type == EVP_PKEY_DSA)
1432 if (!DSA_sign(pkey->save_type,
1433 &(data[MD5_DIGEST_LENGTH]),
1434 SHA_DIGEST_LENGTH,&(p[2]),
1435 (unsigned int *)&j,pkey->pkey.dsa))
1437 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1446 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1449 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1452 s->init_num=(int)n+4;
1455 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1460 static int ssl3_send_client_certificate(s)
1464 EVP_PKEY *pkey=NULL;
1468 if (s->state == SSL3_ST_CW_CERT_A)
1470 if ((s->cert == NULL) ||
1471 (s->cert->key->x509 == NULL) ||
1472 (s->cert->key->privatekey == NULL))
1473 s->state=SSL3_ST_CW_CERT_B;
1475 s->state=SSL3_ST_CW_CERT_C;
1478 /* We need to get a client cert */
1479 if (s->state == SSL3_ST_CW_CERT_B)
1481 /* If we get an error, we need to
1482 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1483 * We then get retied later */
1485 if (s->ctx->client_cert_cb != NULL)
1486 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1489 s->rwstate=SSL_X509_LOOKUP;
1492 s->rwstate=SSL_NOTHING;
1493 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1495 s->state=SSL3_ST_CW_CERT_B;
1496 if ( !SSL_use_certificate(s,x509) ||
1497 !SSL_use_PrivateKey(s,pkey))
1503 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1506 if (x509 != NULL) X509_free(x509);
1507 if (pkey != NULL) EVP_PKEY_free(pkey);
1510 s->s3->tmp.cert_req=0;
1511 ssl3_send_alert(s,SSL3_AL_WARNING,SSL3_AD_NO_CERTIFICATE);
1515 /* Ok, we have a cert */
1516 s->state=SSL3_ST_CW_CERT_C;
1519 if (s->state == SSL3_ST_CW_CERT_C)
1521 s->state=SSL3_ST_CW_CERT_D;
1522 l=ssl3_output_cert_chain(s,s->cert->key->x509);
1526 /* SSL3_ST_CW_CERT_D */
1527 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1530 #define has_bits(i,m) (((i)&(m)) == (m))
1532 static int ssl3_check_cert_and_algorithm(s)
1537 EVP_PKEY *pkey=NULL;
1546 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1550 algs=s->s3->tmp.new_cipher->algorithms;
1552 /* we don't have a certificate */
1553 if (algs & (SSL_aDH|SSL_aNULL))
1556 rsa=s->session->cert->rsa_tmp;
1557 dh=s->session->cert->dh_tmp;
1559 /* This is the passed certificate */
1562 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1563 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1566 /* Check that we have a certificate if we require one */
1567 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1569 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1573 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1575 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1580 if ((algs & SSL_kRSA) &&
1581 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1583 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1587 else if ((algs & SSL_kEDH) &&
1588 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1590 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1593 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1595 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1599 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1607 if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP))
1610 if (algs & SSL_kRSA)
1612 if ((rsa == NULL) || (RSA_size(rsa) > 512))
1614 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1621 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1623 if ((dh == NULL) || (DH_size(dh) > 512))
1625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1638 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_HANDSHAKE_FAILURE);