50bd415b568530f4bc95d9106b63c7fa9f53939b
[dragonfly.git] / crypto / openssl / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
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.
8  * 
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).
15  * 
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.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
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)"
40  * 
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
51  * SUCH DAMAGE.
52  * 
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.]
57  */
58 /* ====================================================================
59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  *    notice, this list of conditions and the following disclaimer. 
67  *
68  * 2. Redistributions in binary form must reproduce the above copyright
69  *    notice, this list of conditions and the following disclaimer in
70  *    the documentation and/or other materials provided with the
71  *    distribution.
72  *
73  * 3. All advertising materials mentioning features or use of this
74  *    software must display the following acknowledgment:
75  *    "This product includes software developed by the OpenSSL Project
76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77  *
78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79  *    endorse or promote products derived from this software without
80  *    prior written permission. For written permission, please contact
81  *    openssl-core@openssl.org.
82  *
83  * 5. Products derived from this software may not be called "OpenSSL"
84  *    nor may "OpenSSL" appear in their names without prior written
85  *    permission of the OpenSSL Project.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  *    acknowledgment:
89  *    "This product includes software developed by the OpenSSL Project
90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103  * OF THE POSSIBILITY OF SUCH DAMAGE.
104  * ====================================================================
105  *
106  * This product includes cryptographic software written by Eric Young
107  * (eay@cryptsoft.com).  This product includes software written by Tim
108  * Hudson (tjh@cryptsoft.com).
109  *
110  */
111 /* ====================================================================
112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113  *
114  * Portions of the attached software ("Contribution") are developed by 
115  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116  *
117  * The Contribution is licensed pursuant to the OpenSSL open source
118  * license provided above.
119  *
120  * ECC cipher suite support in OpenSSL originally written by
121  * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122  *
123  */
124 /* ====================================================================
125  * Copyright 2005 Nokia. All rights reserved.
126  *
127  * The portions of the attached software ("Contribution") is developed by
128  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129  * license.
130  *
131  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133  * support (see RFC 4279) to OpenSSL.
134  *
135  * No patent licenses or other rights except those expressly stated in
136  * the OpenSSL open source license shall be deemed granted or received
137  * expressly, by implication, estoppel, or otherwise.
138  *
139  * No assurances are provided by Nokia that the Contribution does not
140  * infringe the patent or other intellectual property rights of any third
141  * party or that the license provides you with all the necessary rights
142  * to make use of the Contribution.
143  *
144  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148  * OTHERWISE.
149  */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifndef OPENSSL_NO_DH
160 #include <openssl/dh.h>
161 #endif
162 #include <openssl/bn.h>
163 #ifndef OPENSSL_NO_ENGINE
164 #include <openssl/engine.h>
165 #endif
166
167 static const SSL_METHOD *ssl3_get_client_method(int ver);
168 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver)
171         {
172         if (ver == SSL3_VERSION)
173                 return(SSLv3_client_method());
174         else
175                 return(NULL);
176         }
177
178 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
179                         ssl_undefined_function,
180                         ssl3_connect,
181                         ssl3_get_client_method)
182
183 int ssl3_connect(SSL *s)
184         {
185         BUF_MEM *buf=NULL;
186         unsigned long Time=(unsigned long)time(NULL);
187         void (*cb)(const SSL *ssl,int type,int val)=NULL;
188         int ret= -1;
189         int new_state,state,skip=0;
190
191         RAND_add(&Time,sizeof(Time),0);
192         ERR_clear_error();
193         clear_sys_error();
194
195         if (s->info_callback != NULL)
196                 cb=s->info_callback;
197         else if (s->ctx->info_callback != NULL)
198                 cb=s->ctx->info_callback;
199         
200         s->in_handshake++;
201         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
202
203         for (;;)
204                 {
205                 state=s->state;
206
207                 switch(s->state)
208                         {
209                 case SSL_ST_RENEGOTIATE:
210                         s->new_session=1;
211                         s->state=SSL_ST_CONNECT;
212                         s->ctx->stats.sess_connect_renegotiate++;
213                         /* break */
214                 case SSL_ST_BEFORE:
215                 case SSL_ST_CONNECT:
216                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
217                 case SSL_ST_OK|SSL_ST_CONNECT:
218
219                         s->server=0;
220                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
221
222                         if ((s->version & 0xff00 ) != 0x0300)
223                                 {
224                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
225                                 ret = -1;
226                                 goto end;
227                                 }
228                                 
229                         /* s->version=SSL3_VERSION; */
230                         s->type=SSL_ST_CONNECT;
231
232                         if (s->init_buf == NULL)
233                                 {
234                                 if ((buf=BUF_MEM_new()) == NULL)
235                                         {
236                                         ret= -1;
237                                         goto end;
238                                         }
239                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
240                                         {
241                                         ret= -1;
242                                         goto end;
243                                         }
244                                 s->init_buf=buf;
245                                 buf=NULL;
246                                 }
247
248                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
249
250                         /* setup buffing BIO */
251                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
252
253                         /* don't push the buffering BIO quite yet */
254
255                         ssl3_init_finished_mac(s);
256
257                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
258                         s->ctx->stats.sess_connect++;
259                         s->init_num=0;
260                         break;
261
262                 case SSL3_ST_CW_CLNT_HELLO_A:
263                 case SSL3_ST_CW_CLNT_HELLO_B:
264
265                         s->shutdown=0;
266                         ret=ssl3_client_hello(s);
267                         if (ret <= 0) goto end;
268                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
269                         s->init_num=0;
270
271                         /* turn on buffering for the next lot of output */
272                         if (s->bbio != s->wbio)
273                                 s->wbio=BIO_push(s->bbio,s->wbio);
274
275                         break;
276
277                 case SSL3_ST_CR_SRVR_HELLO_A:
278                 case SSL3_ST_CR_SRVR_HELLO_B:
279                         ret=ssl3_get_server_hello(s);
280                         if (ret <= 0) goto end;
281
282                         if (s->hit)
283                                 s->state=SSL3_ST_CR_FINISHED_A;
284                         else
285                                 s->state=SSL3_ST_CR_CERT_A;
286                         s->init_num=0;
287                         break;
288
289                 case SSL3_ST_CR_CERT_A:
290                 case SSL3_ST_CR_CERT_B:
291 #ifndef OPENSSL_NO_TLSEXT
292                         ret=ssl3_check_finished(s);
293                         if (ret <= 0) goto end;
294                         if (ret == 2)
295                                 {
296                                 s->hit = 1;
297                                 if (s->tlsext_ticket_expected)
298                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
299                                 else
300                                         s->state=SSL3_ST_CR_FINISHED_A;
301                                 s->init_num=0;
302                                 break;
303                                 }
304 #endif
305                         /* Check if it is anon DH/ECDH */
306                         /* or PSK */
307                         if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
308                             !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
309                                 {
310                                 ret=ssl3_get_server_certificate(s);
311                                 if (ret <= 0) goto end;
312 #ifndef OPENSSL_NO_TLSEXT
313                                 if (s->tlsext_status_expected)
314                                         s->state=SSL3_ST_CR_CERT_STATUS_A;
315                                 else
316                                         s->state=SSL3_ST_CR_KEY_EXCH_A;
317                                 }
318                         else
319                                 {
320                                 skip = 1;
321                                 s->state=SSL3_ST_CR_KEY_EXCH_A;
322                                 }
323 #else
324                                 }
325                         else
326                                 skip=1;
327
328                         s->state=SSL3_ST_CR_KEY_EXCH_A;
329 #endif
330                         s->init_num=0;
331                         break;
332
333                 case SSL3_ST_CR_KEY_EXCH_A:
334                 case SSL3_ST_CR_KEY_EXCH_B:
335                         ret=ssl3_get_key_exchange(s);
336                         if (ret <= 0) goto end;
337                         s->state=SSL3_ST_CR_CERT_REQ_A;
338                         s->init_num=0;
339
340                         /* at this point we check that we have the
341                          * required stuff from the server */
342                         if (!ssl3_check_cert_and_algorithm(s))
343                                 {
344                                 ret= -1;
345                                 goto end;
346                                 }
347                         break;
348
349                 case SSL3_ST_CR_CERT_REQ_A:
350                 case SSL3_ST_CR_CERT_REQ_B:
351                         ret=ssl3_get_certificate_request(s);
352                         if (ret <= 0) goto end;
353                         s->state=SSL3_ST_CR_SRVR_DONE_A;
354                         s->init_num=0;
355                         break;
356
357                 case SSL3_ST_CR_SRVR_DONE_A:
358                 case SSL3_ST_CR_SRVR_DONE_B:
359                         ret=ssl3_get_server_done(s);
360                         if (ret <= 0) goto end;
361                         if (s->s3->tmp.cert_req)
362                                 s->state=SSL3_ST_CW_CERT_A;
363                         else
364                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
365                         s->init_num=0;
366
367                         break;
368
369                 case SSL3_ST_CW_CERT_A:
370                 case SSL3_ST_CW_CERT_B:
371                 case SSL3_ST_CW_CERT_C:
372                 case SSL3_ST_CW_CERT_D:
373                         ret=ssl3_send_client_certificate(s);
374                         if (ret <= 0) goto end;
375                         s->state=SSL3_ST_CW_KEY_EXCH_A;
376                         s->init_num=0;
377                         break;
378
379                 case SSL3_ST_CW_KEY_EXCH_A:
380                 case SSL3_ST_CW_KEY_EXCH_B:
381                         ret=ssl3_send_client_key_exchange(s);
382                         if (ret <= 0) goto end;
383                         /* EAY EAY EAY need to check for DH fix cert
384                          * sent back */
385                         /* For TLS, cert_req is set to 2, so a cert chain
386                          * of nothing is sent, but no verify packet is sent */
387                         /* XXX: For now, we do not support client 
388                          * authentication in ECDH cipher suites with
389                          * ECDH (rather than ECDSA) certificates.
390                          * We need to skip the certificate verify 
391                          * message when client's ECDH public key is sent 
392                          * inside the client certificate.
393                          */
394                         if (s->s3->tmp.cert_req == 1)
395                                 {
396                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
397                                 }
398                         else
399                                 {
400                                 s->state=SSL3_ST_CW_CHANGE_A;
401                                 s->s3->change_cipher_spec=0;
402                                 }
403                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
404                                 {
405                                 s->state=SSL3_ST_CW_CHANGE_A;
406                                 s->s3->change_cipher_spec=0;
407                                 }
408
409                         s->init_num=0;
410                         break;
411
412                 case SSL3_ST_CW_CERT_VRFY_A:
413                 case SSL3_ST_CW_CERT_VRFY_B:
414                         ret=ssl3_send_client_verify(s);
415                         if (ret <= 0) goto end;
416                         s->state=SSL3_ST_CW_CHANGE_A;
417                         s->init_num=0;
418                         s->s3->change_cipher_spec=0;
419                         break;
420
421                 case SSL3_ST_CW_CHANGE_A:
422                 case SSL3_ST_CW_CHANGE_B:
423                         ret=ssl3_send_change_cipher_spec(s,
424                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
425                         if (ret <= 0) goto end;
426                         s->state=SSL3_ST_CW_FINISHED_A;
427                         s->init_num=0;
428
429                         s->session->cipher=s->s3->tmp.new_cipher;
430 #ifdef OPENSSL_NO_COMP
431                         s->session->compress_meth=0;
432 #else
433                         if (s->s3->tmp.new_compression == NULL)
434                                 s->session->compress_meth=0;
435                         else
436                                 s->session->compress_meth=
437                                         s->s3->tmp.new_compression->id;
438 #endif
439                         if (!s->method->ssl3_enc->setup_key_block(s))
440                                 {
441                                 ret= -1;
442                                 goto end;
443                                 }
444
445                         if (!s->method->ssl3_enc->change_cipher_state(s,
446                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
447                                 {
448                                 ret= -1;
449                                 goto end;
450                                 }
451
452                         break;
453
454                 case SSL3_ST_CW_FINISHED_A:
455                 case SSL3_ST_CW_FINISHED_B:
456                         ret=ssl3_send_finished(s,
457                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
458                                 s->method->ssl3_enc->client_finished_label,
459                                 s->method->ssl3_enc->client_finished_label_len);
460                         if (ret <= 0) goto end;
461                         s->state=SSL3_ST_CW_FLUSH;
462
463                         /* clear flags */
464                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
465                         if (s->hit)
466                                 {
467                                 s->s3->tmp.next_state=SSL_ST_OK;
468                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
469                                         {
470                                         s->state=SSL_ST_OK;
471                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
472                                         s->s3->delay_buf_pop_ret=0;
473                                         }
474                                 }
475                         else
476                                 {
477 #ifndef OPENSSL_NO_TLSEXT
478                                 /* Allow NewSessionTicket if ticket expected */
479                                 if (s->tlsext_ticket_expected)
480                                         s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
481                                 else
482 #endif
483                                 
484                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
485                                 }
486                         s->init_num=0;
487                         break;
488
489 #ifndef OPENSSL_NO_TLSEXT
490                 case SSL3_ST_CR_SESSION_TICKET_A:
491                 case SSL3_ST_CR_SESSION_TICKET_B:
492                         ret=ssl3_get_new_session_ticket(s);
493                         if (ret <= 0) goto end;
494                         s->state=SSL3_ST_CR_FINISHED_A;
495                         s->init_num=0;
496                 break;
497
498                 case SSL3_ST_CR_CERT_STATUS_A:
499                 case SSL3_ST_CR_CERT_STATUS_B:
500                         ret=ssl3_get_cert_status(s);
501                         if (ret <= 0) goto end;
502                         s->state=SSL3_ST_CR_KEY_EXCH_A;
503                         s->init_num=0;
504                 break;
505 #endif
506
507                 case SSL3_ST_CR_FINISHED_A:
508                 case SSL3_ST_CR_FINISHED_B:
509
510                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
511                                 SSL3_ST_CR_FINISHED_B);
512                         if (ret <= 0) goto end;
513
514                         if (s->hit)
515                                 s->state=SSL3_ST_CW_CHANGE_A;
516                         else
517                                 s->state=SSL_ST_OK;
518                         s->init_num=0;
519                         break;
520
521                 case SSL3_ST_CW_FLUSH:
522                         s->rwstate=SSL_WRITING;
523                         if (BIO_flush(s->wbio) <= 0)
524                                 {
525                                 ret= -1;
526                                 goto end;
527                                 }
528                         s->rwstate=SSL_NOTHING;
529                         s->state=s->s3->tmp.next_state;
530                         break;
531
532                 case SSL_ST_OK:
533                         /* clean a few things up */
534                         ssl3_cleanup_key_block(s);
535
536                         if (s->init_buf != NULL)
537                                 {
538                                 BUF_MEM_free(s->init_buf);
539                                 s->init_buf=NULL;
540                                 }
541
542                         /* If we are not 'joining' the last two packets,
543                          * remove the buffering now */
544                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
545                                 ssl_free_wbio_buffer(s);
546                         /* else do it later in ssl3_write */
547
548                         s->init_num=0;
549                         s->new_session=0;
550
551                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
552                         if (s->hit) s->ctx->stats.sess_hit++;
553
554                         ret=1;
555                         /* s->server=0; */
556                         s->handshake_func=ssl3_connect;
557                         s->ctx->stats.sess_connect_good++;
558
559                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
560
561                         goto end;
562                         /* break; */
563                         
564                 default:
565                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
566                         ret= -1;
567                         goto end;
568                         /* break; */
569                         }
570
571                 /* did we do anything */
572                 if (!s->s3->tmp.reuse_message && !skip)
573                         {
574                         if (s->debug)
575                                 {
576                                 if ((ret=BIO_flush(s->wbio)) <= 0)
577                                         goto end;
578                                 }
579
580                         if ((cb != NULL) && (s->state != state))
581                                 {
582                                 new_state=s->state;
583                                 s->state=state;
584                                 cb(s,SSL_CB_CONNECT_LOOP,1);
585                                 s->state=new_state;
586                                 }
587                         }
588                 skip=0;
589                 }
590 end:
591         s->in_handshake--;
592         if (buf != NULL)
593                 BUF_MEM_free(buf);
594         if (cb != NULL)
595                 cb(s,SSL_CB_CONNECT_EXIT,ret);
596         return(ret);
597         }
598
599
600 int ssl3_client_hello(SSL *s)
601         {
602         unsigned char *buf;
603         unsigned char *p,*d;
604         int i;
605         unsigned long Time,l;
606 #ifndef OPENSSL_NO_COMP
607         int j;
608         SSL_COMP *comp;
609 #endif
610
611         buf=(unsigned char *)s->init_buf->data;
612         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
613                 {
614                 SSL_SESSION *sess = s->session;
615                 if ((sess == NULL) ||
616                         (sess->ssl_version != s->version) ||
617 #ifdef OPENSSL_NO_TLSEXT
618                         !sess->session_id_length ||
619 #else
620                         (!sess->session_id_length && !sess->tlsext_tick) ||
621 #endif
622                         (sess->not_resumable))
623                         {
624                         if (!ssl_get_new_session(s,0))
625                                 goto err;
626                         }
627                 /* else use the pre-loaded session */
628
629                 p=s->s3->client_random;
630                 Time=(unsigned long)time(NULL);                 /* Time */
631                 l2n(Time,p);
632                 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
633                         goto err;
634
635                 /* Do the message type and length last */
636                 d=p= &(buf[4]);
637
638                 *(p++)=s->version>>8;
639                 *(p++)=s->version&0xff;
640                 s->client_version=s->version;
641
642                 /* Random stuff */
643                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
644                 p+=SSL3_RANDOM_SIZE;
645
646                 /* Session ID */
647                 if (s->new_session)
648                         i=0;
649                 else
650                         i=s->session->session_id_length;
651                 *(p++)=i;
652                 if (i != 0)
653                         {
654                         if (i > (int)sizeof(s->session->session_id))
655                                 {
656                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
657                                 goto err;
658                                 }
659                         memcpy(p,s->session->session_id,i);
660                         p+=i;
661                         }
662                 
663                 /* Ciphers supported */
664                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
665                 if (i == 0)
666                         {
667                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
668                         goto err;
669                         }
670                 s2n(i,p);
671                 p+=i;
672
673                 /* COMPRESSION */
674 #ifdef OPENSSL_NO_COMP
675                 *(p++)=1;
676 #else
677
678                 if ((s->options & SSL_OP_NO_COMPRESSION)
679                                         || !s->ctx->comp_methods)
680                         j=0;
681                 else
682                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
683                 *(p++)=1+j;
684                 for (i=0; i<j; i++)
685                         {
686                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
687                         *(p++)=comp->id;
688                         }
689 #endif
690                 *(p++)=0; /* Add the NULL method */
691
692 #ifndef OPENSSL_NO_TLSEXT
693                 /* TLS extensions*/
694                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
695                         {
696                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
697                         goto err;
698                         }
699                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
700                         {
701                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
702                         goto err;
703                         }
704 #endif
705                 
706                 l=(p-d);
707                 d=buf;
708                 *(d++)=SSL3_MT_CLIENT_HELLO;
709                 l2n3(l,d);
710
711                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
712                 /* number of bytes to write */
713                 s->init_num=p-buf;
714                 s->init_off=0;
715                 }
716
717         /* SSL3_ST_CW_CLNT_HELLO_B */
718         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
719 err:
720         return(-1);
721         }
722
723 int ssl3_get_server_hello(SSL *s)
724         {
725         STACK_OF(SSL_CIPHER) *sk;
726         const SSL_CIPHER *c;
727         unsigned char *p,*d;
728         int i,al,ok;
729         unsigned int j;
730         long n;
731 #ifndef OPENSSL_NO_COMP
732         SSL_COMP *comp;
733 #endif
734
735         n=s->method->ssl_get_message(s,
736                 SSL3_ST_CR_SRVR_HELLO_A,
737                 SSL3_ST_CR_SRVR_HELLO_B,
738                 -1,
739                 20000, /* ?? */
740                 &ok);
741
742         if (!ok) return((int)n);
743
744         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
745                 {
746                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
747                         {
748                         if ( s->d1->send_cookie == 0)
749                                 {
750                                 s->s3->tmp.reuse_message = 1;
751                                 return 1;
752                                 }
753                         else /* already sent a cookie */
754                                 {
755                                 al=SSL_AD_UNEXPECTED_MESSAGE;
756                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
757                                 goto f_err;
758                                 }
759                         }
760                 }
761         
762         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
763                 {
764                 al=SSL_AD_UNEXPECTED_MESSAGE;
765                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
766                 goto f_err;
767                 }
768
769         d=p=(unsigned char *)s->init_msg;
770
771         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
772                 {
773                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
774                 s->version=(s->version&0xff00)|p[1];
775                 al=SSL_AD_PROTOCOL_VERSION;
776                 goto f_err;
777                 }
778         p+=2;
779
780         /* load the server hello data */
781         /* load the server random */
782         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
783         p+=SSL3_RANDOM_SIZE;
784
785         /* get the session-id */
786         j= *(p++);
787
788         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
789                 {
790                 al=SSL_AD_ILLEGAL_PARAMETER;
791                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
792                 goto f_err;
793                 }
794
795 #ifndef OPENSSL_NO_TLSEXT
796         /* check if we want to resume the session based on external pre-shared secret */
797         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
798                 {
799                 SSL_CIPHER *pref_cipher=NULL;
800                 s->session->master_key_length=sizeof(s->session->master_key);
801                 if (s->tls_session_secret_cb(s, s->session->master_key,
802                                              &s->session->master_key_length,
803                                              NULL, &pref_cipher,
804                                              s->tls_session_secret_cb_arg))
805                         {
806                         s->session->cipher = pref_cipher ?
807                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
808                         }
809                 }
810 #endif /* OPENSSL_NO_TLSEXT */
811
812         if (j != 0 && j == s->session->session_id_length
813             && memcmp(p,s->session->session_id,j) == 0)
814             {
815             if(s->sid_ctx_length != s->session->sid_ctx_length
816                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
817                 {
818                 /* actually a client application bug */
819                 al=SSL_AD_ILLEGAL_PARAMETER;
820                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
821                 goto f_err;
822                 }
823             s->hit=1;
824             }
825         else    /* a miss or crap from the other end */
826                 {
827                 /* If we were trying for session-id reuse, make a new
828                  * SSL_SESSION so we don't stuff up other people */
829                 s->hit=0;
830                 if (s->session->session_id_length > 0)
831                         {
832                         if (!ssl_get_new_session(s,0))
833                                 {
834                                 al=SSL_AD_INTERNAL_ERROR;
835                                 goto f_err;
836                                 }
837                         }
838                 s->session->session_id_length=j;
839                 memcpy(s->session->session_id,p,j); /* j could be 0 */
840                 }
841         p+=j;
842         c=ssl_get_cipher_by_char(s,p);
843         if (c == NULL)
844                 {
845                 /* unknown cipher */
846                 al=SSL_AD_ILLEGAL_PARAMETER;
847                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
848                 goto f_err;
849                 }
850         p+=ssl_put_cipher_by_char(s,NULL,NULL);
851
852         sk=ssl_get_ciphers_by_id(s);
853         i=sk_SSL_CIPHER_find(sk,c);
854         if (i < 0)
855                 {
856                 /* we did not say we would use this cipher */
857                 al=SSL_AD_ILLEGAL_PARAMETER;
858                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
859                 goto f_err;
860                 }
861
862         /* Depending on the session caching (internal/external), the cipher
863            and/or cipher_id values may not be set. Make sure that
864            cipher_id is set and use it for comparison. */
865         if (s->session->cipher)
866                 s->session->cipher_id = s->session->cipher->id;
867         if (s->hit && (s->session->cipher_id != c->id))
868                 {
869 /* Workaround is now obsolete */
870 #if 0
871                 if (!(s->options &
872                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
873 #endif
874                         {
875                         al=SSL_AD_ILLEGAL_PARAMETER;
876                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
877                         goto f_err;
878                         }
879                 }
880         s->s3->tmp.new_cipher=c;
881         if (!ssl3_digest_cached_records(s))
882                 goto f_err;
883
884         /* lets get the compression algorithm */
885         /* COMPRESSION */
886 #ifdef OPENSSL_NO_COMP
887         if (*(p++) != 0)
888                 {
889                 al=SSL_AD_ILLEGAL_PARAMETER;
890                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
891                 goto f_err;
892                 }
893         /* If compression is disabled we'd better not try to resume a session
894          * using compression.
895          */
896         if (s->session->compress_meth != 0)
897                 {
898                 al=SSL_AD_INTERNAL_ERROR;
899                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
900                 goto f_err;
901                 }
902 #else
903         j= *(p++);
904         if (s->hit && j != s->session->compress_meth)
905                 {
906                 al=SSL_AD_ILLEGAL_PARAMETER;
907                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
908                 goto f_err;
909                 }
910         if (j == 0)
911                 comp=NULL;
912         else if (s->options & SSL_OP_NO_COMPRESSION)
913                 {
914                 al=SSL_AD_ILLEGAL_PARAMETER;
915                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
916                 goto f_err;
917                 }
918         else
919                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
920         
921         if ((j != 0) && (comp == NULL))
922                 {
923                 al=SSL_AD_ILLEGAL_PARAMETER;
924                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
925                 goto f_err;
926                 }
927         else
928                 {
929                 s->s3->tmp.new_compression=comp;
930                 }
931 #endif
932
933 #ifndef OPENSSL_NO_TLSEXT
934         /* TLS extensions*/
935         if (s->version >= SSL3_VERSION)
936                 {
937                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
938                         {
939                         /* 'al' set by ssl_parse_serverhello_tlsext */
940                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
941                         goto f_err; 
942                         }
943                 if (ssl_check_serverhello_tlsext(s) <= 0)
944                         {
945                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
946                                 goto err;
947                         }
948                 }
949 #endif
950
951         if (p != (d+n))
952                 {
953                 /* wrong packet length */
954                 al=SSL_AD_DECODE_ERROR;
955                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
956                 goto err;
957                 }
958
959         return(1);
960 f_err:
961         ssl3_send_alert(s,SSL3_AL_FATAL,al);
962 err:
963         return(-1);
964         }
965
966 int ssl3_get_server_certificate(SSL *s)
967         {
968         int al,i,ok,ret= -1;
969         unsigned long n,nc,llen,l;
970         X509 *x=NULL;
971         const unsigned char *q,*p;
972         unsigned char *d;
973         STACK_OF(X509) *sk=NULL;
974         SESS_CERT *sc;
975         EVP_PKEY *pkey=NULL;
976         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
977
978         n=s->method->ssl_get_message(s,
979                 SSL3_ST_CR_CERT_A,
980                 SSL3_ST_CR_CERT_B,
981                 -1,
982                 s->max_cert_list,
983                 &ok);
984
985         if (!ok) return((int)n);
986
987         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
988                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 
989                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
990                 {
991                 s->s3->tmp.reuse_message=1;
992                 return(1);
993                 }
994
995         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
996                 {
997                 al=SSL_AD_UNEXPECTED_MESSAGE;
998                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
999                 goto f_err;
1000                 }
1001         p=d=(unsigned char *)s->init_msg;
1002
1003         if ((sk=sk_X509_new_null()) == NULL)
1004                 {
1005                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1006                 goto err;
1007                 }
1008
1009         n2l3(p,llen);
1010         if (llen+3 != n)
1011                 {
1012                 al=SSL_AD_DECODE_ERROR;
1013                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1014                 goto f_err;
1015                 }
1016         for (nc=0; nc<llen; )
1017                 {
1018                 n2l3(p,l);
1019                 if ((l+nc+3) > llen)
1020                         {
1021                         al=SSL_AD_DECODE_ERROR;
1022                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1023                         goto f_err;
1024                         }
1025
1026                 q=p;
1027                 x=d2i_X509(NULL,&q,l);
1028                 if (x == NULL)
1029                         {
1030                         al=SSL_AD_BAD_CERTIFICATE;
1031                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1032                         goto f_err;
1033                         }
1034                 if (q != (p+l))
1035                         {
1036                         al=SSL_AD_DECODE_ERROR;
1037                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1038                         goto f_err;
1039                         }
1040                 if (!sk_X509_push(sk,x))
1041                         {
1042                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1043                         goto err;
1044                         }
1045                 x=NULL;
1046                 nc+=l+3;
1047                 p=q;
1048                 }
1049
1050         i=ssl_verify_cert_chain(s,sk);
1051         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1052 #ifndef OPENSSL_NO_KRB5
1053             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1054                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1055 #endif /* OPENSSL_NO_KRB5 */
1056                 )
1057                 {
1058                 al=ssl_verify_alarm_type(s->verify_result);
1059                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1060                 goto f_err; 
1061                 }
1062         ERR_clear_error(); /* but we keep s->verify_result */
1063
1064         sc=ssl_sess_cert_new();
1065         if (sc == NULL) goto err;
1066
1067         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1068         s->session->sess_cert=sc;
1069
1070         sc->cert_chain=sk;
1071         /* Inconsistency alert: cert_chain does include the peer's
1072          * certificate, which we don't include in s3_srvr.c */
1073         x=sk_X509_value(sk,0);
1074         sk=NULL;
1075         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1076
1077         pkey=X509_get_pubkey(x);
1078
1079         /* VRS: allow null cert if auth == KRB5 */
1080         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1081                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1082                     ? 0 : 1;
1083
1084 #ifdef KSSL_DEBUG
1085         printf("pkey,x = %p, %p\n", pkey,x);
1086         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1087         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1088                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1089 #endif    /* KSSL_DEBUG */
1090
1091         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1092                 {
1093                 x=NULL;
1094                 al=SSL3_AL_FATAL;
1095                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1096                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1097                 goto f_err;
1098                 }
1099
1100         i=ssl_cert_type(x,pkey);
1101         if (need_cert && i < 0)
1102                 {
1103                 x=NULL;
1104                 al=SSL3_AL_FATAL;
1105                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1106                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1107                 goto f_err;
1108                 }
1109
1110         if (need_cert)
1111                 {
1112                 sc->peer_cert_type=i;
1113                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1114                 /* Why would the following ever happen?
1115                  * We just created sc a couple of lines ago. */
1116                 if (sc->peer_pkeys[i].x509 != NULL)
1117                         X509_free(sc->peer_pkeys[i].x509);
1118                 sc->peer_pkeys[i].x509=x;
1119                 sc->peer_key= &(sc->peer_pkeys[i]);
1120
1121                 if (s->session->peer != NULL)
1122                         X509_free(s->session->peer);
1123                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1124                 s->session->peer=x;
1125                 }
1126         else
1127                 {
1128                 sc->peer_cert_type=i;
1129                 sc->peer_key= NULL;
1130
1131                 if (s->session->peer != NULL)
1132                         X509_free(s->session->peer);
1133                 s->session->peer=NULL;
1134                 }
1135         s->session->verify_result = s->verify_result;
1136
1137         x=NULL;
1138         ret=1;
1139
1140         if (0)
1141                 {
1142 f_err:
1143                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1144                 }
1145 err:
1146         EVP_PKEY_free(pkey);
1147         X509_free(x);
1148         sk_X509_pop_free(sk,X509_free);
1149         return(ret);
1150         }
1151
1152 int ssl3_get_key_exchange(SSL *s)
1153         {
1154 #ifndef OPENSSL_NO_RSA
1155         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1156 #endif
1157         EVP_MD_CTX md_ctx;
1158         unsigned char *param,*p;
1159         int al,i,j,param_len,ok;
1160         long n,alg_k,alg_a;
1161         EVP_PKEY *pkey=NULL;
1162 #ifndef OPENSSL_NO_RSA
1163         RSA *rsa=NULL;
1164 #endif
1165 #ifndef OPENSSL_NO_DH
1166         DH *dh=NULL;
1167 #endif
1168 #ifndef OPENSSL_NO_ECDH
1169         EC_KEY *ecdh = NULL;
1170         BN_CTX *bn_ctx = NULL;
1171         EC_POINT *srvr_ecpoint = NULL;
1172         int curve_nid = 0;
1173         int encoded_pt_len = 0;
1174 #endif
1175
1176         /* use same message size as in ssl3_get_certificate_request()
1177          * as ServerKeyExchange message may be skipped */
1178         n=s->method->ssl_get_message(s,
1179                 SSL3_ST_CR_KEY_EXCH_A,
1180                 SSL3_ST_CR_KEY_EXCH_B,
1181                 -1,
1182                 s->max_cert_list,
1183                 &ok);
1184         if (!ok) return((int)n);
1185
1186         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1187                 {
1188 #ifndef OPENSSL_NO_PSK
1189                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1190                    omitted if no identity hint is sent. Set
1191                    session->sess_cert anyway to avoid problems
1192                    later.*/
1193                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1194                         {
1195                         s->session->sess_cert=ssl_sess_cert_new();
1196                         if (s->ctx->psk_identity_hint)
1197                                 OPENSSL_free(s->ctx->psk_identity_hint);
1198                         s->ctx->psk_identity_hint = NULL;
1199                         }
1200 #endif
1201                 s->s3->tmp.reuse_message=1;
1202                 return(1);
1203                 }
1204
1205         param=p=(unsigned char *)s->init_msg;
1206         if (s->session->sess_cert != NULL)
1207                 {
1208 #ifndef OPENSSL_NO_RSA
1209                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1210                         {
1211                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1212                         s->session->sess_cert->peer_rsa_tmp=NULL;
1213                         }
1214 #endif
1215 #ifndef OPENSSL_NO_DH
1216                 if (s->session->sess_cert->peer_dh_tmp)
1217                         {
1218                         DH_free(s->session->sess_cert->peer_dh_tmp);
1219                         s->session->sess_cert->peer_dh_tmp=NULL;
1220                         }
1221 #endif
1222 #ifndef OPENSSL_NO_ECDH
1223                 if (s->session->sess_cert->peer_ecdh_tmp)
1224                         {
1225                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1226                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1227                         }
1228 #endif
1229                 }
1230         else
1231                 {
1232                 s->session->sess_cert=ssl_sess_cert_new();
1233                 }
1234
1235         param_len=0;
1236         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1237         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1238         EVP_MD_CTX_init(&md_ctx);
1239
1240 #ifndef OPENSSL_NO_PSK
1241         if (alg_k & SSL_kPSK)
1242                 {
1243                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1244
1245                 al=SSL_AD_HANDSHAKE_FAILURE;
1246                 n2s(p,i);
1247                 param_len=i+2;
1248                 /* Store PSK identity hint for later use, hint is used
1249                  * in ssl3_send_client_key_exchange.  Assume that the
1250                  * maximum length of a PSK identity hint can be as
1251                  * long as the maximum length of a PSK identity. */
1252                 if (i > PSK_MAX_IDENTITY_LEN)
1253                         {
1254                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1255                                 SSL_R_DATA_LENGTH_TOO_LONG);
1256                         goto f_err;
1257                         }
1258                 if (param_len > n)
1259                         {
1260                         al=SSL_AD_DECODE_ERROR;
1261                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1262                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1263                         goto f_err;
1264                         }
1265                 /* If received PSK identity hint contains NULL
1266                  * characters, the hint is truncated from the first
1267                  * NULL. p may not be ending with NULL, so create a
1268                  * NULL-terminated string. */
1269                 memcpy(tmp_id_hint, p, i);
1270                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1271                 if (s->ctx->psk_identity_hint != NULL)
1272                         OPENSSL_free(s->ctx->psk_identity_hint);
1273                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1274                 if (s->ctx->psk_identity_hint == NULL)
1275                         {
1276                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1277                         goto f_err;
1278                         }          
1279
1280                 p+=i;
1281                 n-=param_len;
1282                 }
1283         else
1284 #endif /* !OPENSSL_NO_PSK */
1285 #ifndef OPENSSL_NO_RSA
1286         if (alg_k & SSL_kRSA)
1287                 {
1288                 if ((rsa=RSA_new()) == NULL)
1289                         {
1290                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1291                         goto err;
1292                         }
1293                 n2s(p,i);
1294                 param_len=i+2;
1295                 if (param_len > n)
1296                         {
1297                         al=SSL_AD_DECODE_ERROR;
1298                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1299                         goto f_err;
1300                         }
1301                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1302                         {
1303                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1304                         goto err;
1305                         }
1306                 p+=i;
1307
1308                 n2s(p,i);
1309                 param_len+=i+2;
1310                 if (param_len > n)
1311                         {
1312                         al=SSL_AD_DECODE_ERROR;
1313                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1314                         goto f_err;
1315                         }
1316                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1317                         {
1318                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1319                         goto err;
1320                         }
1321                 p+=i;
1322                 n-=param_len;
1323
1324                 /* this should be because we are using an export cipher */
1325                 if (alg_a & SSL_aRSA)
1326                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1327                 else
1328                         {
1329                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1330                         goto err;
1331                         }
1332                 s->session->sess_cert->peer_rsa_tmp=rsa;
1333                 rsa=NULL;
1334                 }
1335 #else /* OPENSSL_NO_RSA */
1336         if (0)
1337                 ;
1338 #endif
1339 #ifndef OPENSSL_NO_DH
1340         else if (alg_k & SSL_kEDH)
1341                 {
1342                 if ((dh=DH_new()) == NULL)
1343                         {
1344                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1345                         goto err;
1346                         }
1347                 n2s(p,i);
1348                 param_len=i+2;
1349                 if (param_len > n)
1350                         {
1351                         al=SSL_AD_DECODE_ERROR;
1352                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1353                         goto f_err;
1354                         }
1355                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1356                         {
1357                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1358                         goto err;
1359                         }
1360                 p+=i;
1361
1362                 n2s(p,i);
1363                 param_len+=i+2;
1364                 if (param_len > n)
1365                         {
1366                         al=SSL_AD_DECODE_ERROR;
1367                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1368                         goto f_err;
1369                         }
1370                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1371                         {
1372                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1373                         goto err;
1374                         }
1375                 p+=i;
1376
1377                 n2s(p,i);
1378                 param_len+=i+2;
1379                 if (param_len > n)
1380                         {
1381                         al=SSL_AD_DECODE_ERROR;
1382                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1383                         goto f_err;
1384                         }
1385                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1386                         {
1387                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1388                         goto err;
1389                         }
1390                 p+=i;
1391                 n-=param_len;
1392
1393 #ifndef OPENSSL_NO_RSA
1394                 if (alg_a & SSL_aRSA)
1395                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1396 #else
1397                 if (0)
1398                         ;
1399 #endif
1400 #ifndef OPENSSL_NO_DSA
1401                 else if (alg_a & SSL_aDSS)
1402                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1403 #endif
1404                 /* else anonymous DH, so no certificate or pkey. */
1405
1406                 s->session->sess_cert->peer_dh_tmp=dh;
1407                 dh=NULL;
1408                 }
1409         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1410                 {
1411                 al=SSL_AD_ILLEGAL_PARAMETER;
1412                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1413                 goto f_err;
1414                 }
1415 #endif /* !OPENSSL_NO_DH */
1416
1417 #ifndef OPENSSL_NO_ECDH
1418         else if (alg_k & SSL_kEECDH)
1419                 {
1420                 EC_GROUP *ngroup;
1421                 const EC_GROUP *group;
1422
1423                 if ((ecdh=EC_KEY_new()) == NULL)
1424                         {
1425                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1426                         goto err;
1427                         }
1428
1429                 /* Extract elliptic curve parameters and the
1430                  * server's ephemeral ECDH public key.
1431                  * Keep accumulating lengths of various components in
1432                  * param_len and make sure it never exceeds n.
1433                  */
1434
1435                 /* XXX: For now we only support named (not generic) curves
1436                  * and the ECParameters in this case is just three bytes.
1437                  */
1438                 param_len=3;
1439                 if ((param_len > n) ||
1440                     (*p != NAMED_CURVE_TYPE) || 
1441                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 
1442                         {
1443                         al=SSL_AD_INTERNAL_ERROR;
1444                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1445                         goto f_err;
1446                         }
1447
1448                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1449                 if (ngroup == NULL)
1450                         {
1451                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1452                         goto err;
1453                         }
1454                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1455                         {
1456                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1457                         goto err;
1458                         }
1459                 EC_GROUP_free(ngroup);
1460
1461                 group = EC_KEY_get0_group(ecdh);
1462
1463                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1464                     (EC_GROUP_get_degree(group) > 163))
1465                         {
1466                         al=SSL_AD_EXPORT_RESTRICTION;
1467                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1468                         goto f_err;
1469                         }
1470
1471                 p+=3;
1472
1473                 /* Next, get the encoded ECPoint */
1474                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1475                     ((bn_ctx = BN_CTX_new()) == NULL))
1476                         {
1477                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1478                         goto err;
1479                         }
1480
1481                 encoded_pt_len = *p;  /* length of encoded point */
1482                 p+=1;
1483                 param_len += (1 + encoded_pt_len);
1484                 if ((param_len > n) ||
1485                     (EC_POINT_oct2point(group, srvr_ecpoint, 
1486                         p, encoded_pt_len, bn_ctx) == 0))
1487                         {
1488                         al=SSL_AD_DECODE_ERROR;
1489                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1490                         goto f_err;
1491                         }
1492
1493                 n-=param_len;
1494                 p+=encoded_pt_len;
1495
1496                 /* The ECC/TLS specification does not mention
1497                  * the use of DSA to sign ECParameters in the server
1498                  * key exchange message. We do support RSA and ECDSA.
1499                  */
1500                 if (0) ;
1501 #ifndef OPENSSL_NO_RSA
1502                 else if (alg_a & SSL_aRSA)
1503                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1504 #endif
1505 #ifndef OPENSSL_NO_ECDSA
1506                 else if (alg_a & SSL_aECDSA)
1507                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1508 #endif
1509                 /* else anonymous ECDH, so no certificate or pkey. */
1510                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1511                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1512                 ecdh=NULL;
1513                 BN_CTX_free(bn_ctx);
1514                 bn_ctx = NULL;
1515                 EC_POINT_free(srvr_ecpoint);
1516                 srvr_ecpoint = NULL;
1517                 }
1518         else if (alg_k)
1519                 {
1520                 al=SSL_AD_UNEXPECTED_MESSAGE;
1521                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1522                 goto f_err;
1523                 }
1524 #endif /* !OPENSSL_NO_ECDH */
1525
1526
1527         /* p points to the next byte, there are 'n' bytes left */
1528
1529         /* if it was signed, check the signature */
1530         if (pkey != NULL)
1531                 {
1532                 n2s(p,i);
1533                 n-=2;
1534                 j=EVP_PKEY_size(pkey);
1535
1536                 if ((i != n) || (n > j) || (n <= 0))
1537                         {
1538                         /* wrong packet length */
1539                         al=SSL_AD_DECODE_ERROR;
1540                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1541                         goto f_err;
1542                         }
1543
1544 #ifndef OPENSSL_NO_RSA
1545                 if (pkey->type == EVP_PKEY_RSA)
1546                         {
1547                         int num;
1548
1549                         j=0;
1550                         q=md_buf;
1551                         for (num=2; num > 0; num--)
1552                                 {
1553                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1554                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1555                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1556                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1557                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1558                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1559                                 q+=i;
1560                                 j+=i;
1561                                 }
1562                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1563                                                                 pkey->pkey.rsa);
1564                         if (i < 0)
1565                                 {
1566                                 al=SSL_AD_DECRYPT_ERROR;
1567                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1568                                 goto f_err;
1569                                 }
1570                         if (i == 0)
1571                                 {
1572                                 /* bad signature */
1573                                 al=SSL_AD_DECRYPT_ERROR;
1574                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1575                                 goto f_err;
1576                                 }
1577                         }
1578                 else
1579 #endif
1580 #ifndef OPENSSL_NO_DSA
1581                         if (pkey->type == EVP_PKEY_DSA)
1582                         {
1583                         /* lets do DSS */
1584                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1585                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1586                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1587                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1588                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1589                                 {
1590                                 /* bad signature */
1591                                 al=SSL_AD_DECRYPT_ERROR;
1592                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1593                                 goto f_err;
1594                                 }
1595                         }
1596                 else
1597 #endif
1598 #ifndef OPENSSL_NO_ECDSA
1599                         if (pkey->type == EVP_PKEY_EC)
1600                         {
1601                         /* let's do ECDSA */
1602                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1603                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1604                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1605                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1606                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1607                                 {
1608                                 /* bad signature */
1609                                 al=SSL_AD_DECRYPT_ERROR;
1610                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1611                                 goto f_err;
1612                                 }
1613                         }
1614                 else
1615 #endif
1616                         {
1617                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1618                         goto err;
1619                         }
1620                 }
1621         else
1622                 {
1623                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1624                         /* aNULL or kPSK do not need public keys */
1625                         {
1626                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1627                         goto err;
1628                         }
1629                 /* still data left over */
1630                 if (n != 0)
1631                         {
1632                         al=SSL_AD_DECODE_ERROR;
1633                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1634                         goto f_err;
1635                         }
1636                 }
1637         EVP_PKEY_free(pkey);
1638         EVP_MD_CTX_cleanup(&md_ctx);
1639         return(1);
1640 f_err:
1641         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1642 err:
1643         EVP_PKEY_free(pkey);
1644 #ifndef OPENSSL_NO_RSA
1645         if (rsa != NULL)
1646                 RSA_free(rsa);
1647 #endif
1648 #ifndef OPENSSL_NO_DH
1649         if (dh != NULL)
1650                 DH_free(dh);
1651 #endif
1652 #ifndef OPENSSL_NO_ECDH
1653         BN_CTX_free(bn_ctx);
1654         EC_POINT_free(srvr_ecpoint);
1655         if (ecdh != NULL)
1656                 EC_KEY_free(ecdh);
1657 #endif
1658         EVP_MD_CTX_cleanup(&md_ctx);
1659         return(-1);
1660         }
1661
1662 int ssl3_get_certificate_request(SSL *s)
1663         {
1664         int ok,ret=0;
1665         unsigned long n,nc,l;
1666         unsigned int llen,ctype_num,i;
1667         X509_NAME *xn=NULL;
1668         const unsigned char *p,*q;
1669         unsigned char *d;
1670         STACK_OF(X509_NAME) *ca_sk=NULL;
1671
1672         n=s->method->ssl_get_message(s,
1673                 SSL3_ST_CR_CERT_REQ_A,
1674                 SSL3_ST_CR_CERT_REQ_B,
1675                 -1,
1676                 s->max_cert_list,
1677                 &ok);
1678
1679         if (!ok) return((int)n);
1680
1681         s->s3->tmp.cert_req=0;
1682
1683         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1684                 {
1685                 s->s3->tmp.reuse_message=1;
1686                 return(1);
1687                 }
1688
1689         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1690                 {
1691                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1692                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1693                 goto err;
1694                 }
1695
1696         /* TLS does not like anon-DH with client cert */
1697         if (s->version > SSL3_VERSION)
1698                 {
1699                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1700                         {
1701                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1702                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1703                         goto err;
1704                         }
1705                 }
1706
1707         p=d=(unsigned char *)s->init_msg;
1708
1709         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1710                 {
1711                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1712                 goto err;
1713                 }
1714
1715         /* get the certificate types */
1716         ctype_num= *(p++);
1717         if (ctype_num > SSL3_CT_NUMBER)
1718                 ctype_num=SSL3_CT_NUMBER;
1719         for (i=0; i<ctype_num; i++)
1720                 s->s3->tmp.ctype[i]= p[i];
1721         p+=ctype_num;
1722
1723         /* get the CA RDNs */
1724         n2s(p,llen);
1725 #if 0
1726 {
1727 FILE *out;
1728 out=fopen("/tmp/vsign.der","w");
1729 fwrite(p,1,llen,out);
1730 fclose(out);
1731 }
1732 #endif
1733
1734         if ((llen+ctype_num+2+1) != n)
1735                 {
1736                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1737                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1738                 goto err;
1739                 }
1740
1741         for (nc=0; nc<llen; )
1742                 {
1743                 n2s(p,l);
1744                 if ((l+nc+2) > llen)
1745                         {
1746                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1747                                 goto cont; /* netscape bugs */
1748                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1749                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1750                         goto err;
1751                         }
1752
1753                 q=p;
1754
1755                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1756                         {
1757                         /* If netscape tolerance is on, ignore errors */
1758                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1759                                 goto cont;
1760                         else
1761                                 {
1762                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1763                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1764                                 goto err;
1765                                 }
1766                         }
1767
1768                 if (q != (p+l))
1769                         {
1770                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1771                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1772                         goto err;
1773                         }
1774                 if (!sk_X509_NAME_push(ca_sk,xn))
1775                         {
1776                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1777                         goto err;
1778                         }
1779
1780                 p+=l;
1781                 nc+=l+2;
1782                 }
1783
1784         if (0)
1785                 {
1786 cont:
1787                 ERR_clear_error();
1788                 }
1789
1790         /* we should setup a certificate to return.... */
1791         s->s3->tmp.cert_req=1;
1792         s->s3->tmp.ctype_num=ctype_num;
1793         if (s->s3->tmp.ca_names != NULL)
1794                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1795         s->s3->tmp.ca_names=ca_sk;
1796         ca_sk=NULL;
1797
1798         ret=1;
1799 err:
1800         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1801         return(ret);
1802         }
1803
1804 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1805         {
1806         return(X509_NAME_cmp(*a,*b));
1807         }
1808 #ifndef OPENSSL_NO_TLSEXT
1809 int ssl3_get_new_session_ticket(SSL *s)
1810         {
1811         int ok,al,ret=0, ticklen;
1812         long n;
1813         const unsigned char *p;
1814         unsigned char *d;
1815
1816         n=s->method->ssl_get_message(s,
1817                 SSL3_ST_CR_SESSION_TICKET_A,
1818                 SSL3_ST_CR_SESSION_TICKET_B,
1819                 -1,
1820                 16384,
1821                 &ok);
1822
1823         if (!ok)
1824                 return((int)n);
1825
1826         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1827                 {
1828                 s->s3->tmp.reuse_message=1;
1829                 return(1);
1830                 }
1831         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1832                 {
1833                 al=SSL_AD_UNEXPECTED_MESSAGE;
1834                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1835                 goto f_err;
1836                 }
1837         if (n < 6)
1838                 {
1839                 /* need at least ticket_lifetime_hint + ticket length */
1840                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1841                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1842                 goto f_err;
1843                 }
1844
1845         p=d=(unsigned char *)s->init_msg;
1846         n2l(p, s->session->tlsext_tick_lifetime_hint);
1847         n2s(p, ticklen);
1848         /* ticket_lifetime_hint + ticket_length + ticket */
1849         if (ticklen + 6 != n)
1850                 {
1851                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1852                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1853                 goto f_err;
1854                 }
1855         if (s->session->tlsext_tick)
1856                 {
1857                 OPENSSL_free(s->session->tlsext_tick);
1858                 s->session->tlsext_ticklen = 0;
1859                 }
1860         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1861         if (!s->session->tlsext_tick)
1862                 {
1863                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1864                 goto err;
1865                 }
1866         memcpy(s->session->tlsext_tick, p, ticklen);
1867         s->session->tlsext_ticklen = ticklen;
1868         /* There are two ways to detect a resumed ticket sesion.
1869          * One is to set an appropriate session ID and then the server
1870          * must return a match in ServerHello. This allows the normal
1871          * client session ID matching to work and we know much 
1872          * earlier that the ticket has been accepted.
1873          * 
1874          * The other way is to set zero length session ID when the
1875          * ticket is presented and rely on the handshake to determine
1876          * session resumption.
1877          *
1878          * We choose the former approach because this fits in with
1879          * assumptions elsewhere in OpenSSL. The session ID is set
1880          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1881          * ticket.
1882          */ 
1883         EVP_Digest(p, ticklen,
1884                         s->session->session_id, &s->session->session_id_length,
1885 #ifndef OPENSSL_NO_SHA256
1886                                                         EVP_sha256(), NULL);
1887 #else
1888                                                         EVP_sha1(), NULL);
1889 #endif
1890         ret=1;
1891         return(ret);
1892 f_err:
1893         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1894 err:
1895         return(-1);
1896         }
1897
1898 int ssl3_get_cert_status(SSL *s)
1899         {
1900         int ok, al;
1901         unsigned long resplen,n;
1902         const unsigned char *p;
1903
1904         n=s->method->ssl_get_message(s,
1905                 SSL3_ST_CR_CERT_STATUS_A,
1906                 SSL3_ST_CR_CERT_STATUS_B,
1907                 SSL3_MT_CERTIFICATE_STATUS,
1908                 16384,
1909                 &ok);
1910
1911         if (!ok) return((int)n);
1912         if (n < 4)
1913                 {
1914                 /* need at least status type + length */
1915                 al = SSL_AD_DECODE_ERROR;
1916                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1917                 goto f_err;
1918                 }
1919         p = (unsigned char *)s->init_msg;
1920         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1921                 {
1922                 al = SSL_AD_DECODE_ERROR;
1923                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1924                 goto f_err;
1925                 }
1926         n2l3(p, resplen);
1927         if (resplen + 4 != n)
1928                 {
1929                 al = SSL_AD_DECODE_ERROR;
1930                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1931                 goto f_err;
1932                 }
1933         if (s->tlsext_ocsp_resp)
1934                 OPENSSL_free(s->tlsext_ocsp_resp);
1935         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1936         if (!s->tlsext_ocsp_resp)
1937                 {
1938                 al = SSL_AD_INTERNAL_ERROR;
1939                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1940                 goto f_err;
1941                 }
1942         s->tlsext_ocsp_resplen = resplen;
1943         if (s->ctx->tlsext_status_cb)
1944                 {
1945                 int ret;
1946                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1947                 if (ret == 0)
1948                         {
1949                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1950                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1951                         goto f_err;
1952                         }
1953                 if (ret < 0)
1954                         {
1955                         al = SSL_AD_INTERNAL_ERROR;
1956                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1957                         goto f_err;
1958                         }
1959                 }
1960         return 1;
1961 f_err:
1962         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1963         return(-1);
1964         }
1965 #endif
1966
1967 int ssl3_get_server_done(SSL *s)
1968         {
1969         int ok,ret=0;
1970         long n;
1971
1972         n=s->method->ssl_get_message(s,
1973                 SSL3_ST_CR_SRVR_DONE_A,
1974                 SSL3_ST_CR_SRVR_DONE_B,
1975                 SSL3_MT_SERVER_DONE,
1976                 30, /* should be very small, like 0 :-) */
1977                 &ok);
1978
1979         if (!ok) return((int)n);
1980         if (n > 0)
1981                 {
1982                 /* should contain no data */
1983                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1984                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1985                 return -1;
1986                 }
1987         ret=1;
1988         return(ret);
1989         }
1990
1991
1992 int ssl3_send_client_key_exchange(SSL *s)
1993         {
1994         unsigned char *p,*d;
1995         int n;
1996         unsigned long alg_k;
1997 #ifndef OPENSSL_NO_RSA
1998         unsigned char *q;
1999         EVP_PKEY *pkey=NULL;
2000 #endif
2001 #ifndef OPENSSL_NO_KRB5
2002         KSSL_ERR kssl_err;
2003 #endif /* OPENSSL_NO_KRB5 */
2004 #ifndef OPENSSL_NO_ECDH
2005         EC_KEY *clnt_ecdh = NULL;
2006         const EC_POINT *srvr_ecpoint = NULL;
2007         EVP_PKEY *srvr_pub_pkey = NULL;
2008         unsigned char *encodedPoint = NULL;
2009         int encoded_pt_len = 0;
2010         BN_CTX * bn_ctx = NULL;
2011 #endif
2012
2013         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2014                 {
2015                 d=(unsigned char *)s->init_buf->data;
2016                 p= &(d[4]);
2017
2018                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2019
2020                 /* Fool emacs indentation */
2021                 if (0) {}
2022 #ifndef OPENSSL_NO_RSA
2023                 else if (alg_k & SSL_kRSA)
2024                         {
2025                         RSA *rsa;
2026                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2027
2028                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2029                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2030                         else
2031                                 {
2032                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2033                                 if ((pkey == NULL) ||
2034                                         (pkey->type != EVP_PKEY_RSA) ||
2035                                         (pkey->pkey.rsa == NULL))
2036                                         {
2037                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2038                                         goto err;
2039                                         }
2040                                 rsa=pkey->pkey.rsa;
2041                                 EVP_PKEY_free(pkey);
2042                                 }
2043                                 
2044                         tmp_buf[0]=s->client_version>>8;
2045                         tmp_buf[1]=s->client_version&0xff;
2046                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2047                                         goto err;
2048
2049                         s->session->master_key_length=sizeof tmp_buf;
2050
2051                         q=p;
2052                         /* Fix buf for TLS and beyond */
2053                         if (s->version > SSL3_VERSION)
2054                                 p+=2;
2055                         n=RSA_public_encrypt(sizeof tmp_buf,
2056                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2057 #ifdef PKCS1_CHECK
2058                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2059                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2060 #endif
2061                         if (n <= 0)
2062                                 {
2063                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2064                                 goto err;
2065                                 }
2066
2067                         /* Fix buf for TLS and beyond */
2068                         if (s->version > SSL3_VERSION)
2069                                 {
2070                                 s2n(n,q);
2071                                 n+=2;
2072                                 }
2073
2074                         s->session->master_key_length=
2075                                 s->method->ssl3_enc->generate_master_secret(s,
2076                                         s->session->master_key,
2077                                         tmp_buf,sizeof tmp_buf);
2078                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2079                         }
2080 #endif
2081 #ifndef OPENSSL_NO_KRB5
2082                 else if (alg_k & SSL_kKRB5)
2083                         {
2084                         krb5_error_code krb5rc;
2085                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2086                         /*  krb5_data   krb5_ap_req;  */
2087                         krb5_data       *enc_ticket;
2088                         krb5_data       authenticator, *authp = NULL;
2089                         EVP_CIPHER_CTX  ciph_ctx;
2090                         const EVP_CIPHER *enc = NULL;
2091                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2092                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2093                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH 
2094                                                 + EVP_MAX_IV_LENGTH];
2095                         int             padl, outl = sizeof(epms);
2096
2097                         EVP_CIPHER_CTX_init(&ciph_ctx);
2098
2099 #ifdef KSSL_DEBUG
2100                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2101                                 alg_k, SSL_kKRB5);
2102 #endif  /* KSSL_DEBUG */
2103
2104                         authp = NULL;
2105 #ifdef KRB5SENDAUTH
2106                         if (KRB5SENDAUTH)  authp = &authenticator;
2107 #endif  /* KRB5SENDAUTH */
2108
2109                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2110                                 &kssl_err);
2111                         enc = kssl_map_enc(kssl_ctx->enctype);
2112                         if (enc == NULL)
2113                             goto err;
2114 #ifdef KSSL_DEBUG
2115                         {
2116                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2117                         if (krb5rc && kssl_err.text)
2118                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2119                         }
2120 #endif  /* KSSL_DEBUG */
2121
2122                         if (krb5rc)
2123                                 {
2124                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2125                                                 SSL_AD_HANDSHAKE_FAILURE);
2126                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2127                                                 kssl_err.reason);
2128                                 goto err;
2129                                 }
2130
2131                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2132                         **  in place of RFC 2712 KerberosWrapper, as in:
2133                         **
2134                         **  Send ticket (copy to *p, set n = length)
2135                         **  n = krb5_ap_req.length;
2136                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2137                         **  if (krb5_ap_req.data)  
2138                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2139                         **
2140                         **  Now using real RFC 2712 KerberosWrapper
2141                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2142                         **  Note: 2712 "opaque" types are here replaced
2143                         **  with a 2-byte length followed by the value.
2144                         **  Example:
2145                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2146                         **  Where "xx xx" = length bytes.  Shown here with
2147                         **  optional authenticator omitted.
2148                         */
2149
2150                         /*  KerberosWrapper.Ticket              */
2151                         s2n(enc_ticket->length,p);
2152                         memcpy(p, enc_ticket->data, enc_ticket->length);
2153                         p+= enc_ticket->length;
2154                         n = enc_ticket->length + 2;
2155
2156                         /*  KerberosWrapper.Authenticator       */
2157                         if (authp  &&  authp->length)  
2158                                 {
2159                                 s2n(authp->length,p);
2160                                 memcpy(p, authp->data, authp->length);
2161                                 p+= authp->length;
2162                                 n+= authp->length + 2;
2163                                 
2164                                 free(authp->data);
2165                                 authp->data = NULL;
2166                                 authp->length = 0;
2167                                 }
2168                         else
2169                                 {
2170                                 s2n(0,p);/*  null authenticator length  */
2171                                 n+=2;
2172                                 }
2173  
2174                             tmp_buf[0]=s->client_version>>8;
2175                             tmp_buf[1]=s->client_version&0xff;
2176                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2177                                 goto err;
2178
2179                         /*  20010420 VRS.  Tried it this way; failed.
2180                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2181                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2182                         **                              kssl_ctx->length);
2183                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2184                         */
2185
2186                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2187                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2188                                 kssl_ctx->key,iv);
2189                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2190                                 sizeof tmp_buf);
2191                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2192                         outl += padl;
2193                         if (outl > (int)sizeof epms)
2194                                 {
2195                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2196                                 goto err;
2197                                 }
2198                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2199
2200                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2201                         s2n(outl,p);
2202                         memcpy(p, epms, outl);
2203                         p+=outl;
2204                         n+=outl + 2;
2205
2206                         s->session->master_key_length=
2207                                 s->method->ssl3_enc->generate_master_secret(s,
2208                                         s->session->master_key,
2209                                         tmp_buf, sizeof tmp_buf);
2210
2211                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2212                         OPENSSL_cleanse(epms, outl);
2213                         }
2214 #endif
2215 #ifndef OPENSSL_NO_DH
2216                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2217                         {
2218                         DH *dh_srvr,*dh_clnt;
2219
2220                         if (s->session->sess_cert == NULL) 
2221                                 {
2222                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2223                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2224                                 goto err;
2225                                 }
2226
2227                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2228                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2229                         else
2230                                 {
2231                                 /* we get them from the cert */
2232                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2233                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2234                                 goto err;
2235                                 }
2236                         
2237                         /* generate a new random key */
2238                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2239                                 {
2240                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2241                                 goto err;
2242                                 }
2243                         if (!DH_generate_key(dh_clnt))
2244                                 {
2245                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2246                                 DH_free(dh_clnt);
2247                                 goto err;
2248                                 }
2249
2250                         /* use the 'p' output buffer for the DH key, but
2251                          * make sure to clear it out afterwards */
2252
2253                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2254
2255                         if (n <= 0)
2256                                 {
2257                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2258                                 DH_free(dh_clnt);
2259                                 goto err;
2260                                 }
2261
2262                         /* generate master key from the result */
2263                         s->session->master_key_length=
2264                                 s->method->ssl3_enc->generate_master_secret(s,
2265                                         s->session->master_key,p,n);
2266                         /* clean up */
2267                         memset(p,0,n);
2268
2269                         /* send off the data */
2270                         n=BN_num_bytes(dh_clnt->pub_key);
2271                         s2n(n,p);
2272                         BN_bn2bin(dh_clnt->pub_key,p);
2273                         n+=2;
2274
2275                         DH_free(dh_clnt);
2276
2277                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2278                         }
2279 #endif
2280
2281 #ifndef OPENSSL_NO_ECDH 
2282                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2283                         {
2284                         const EC_GROUP *srvr_group = NULL;
2285                         EC_KEY *tkey;
2286                         int ecdh_clnt_cert = 0;
2287                         int field_size = 0;
2288
2289                         /* Did we send out the client's
2290                          * ECDH share for use in premaster
2291                          * computation as part of client certificate?
2292                          * If so, set ecdh_clnt_cert to 1.
2293                          */
2294                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 
2295                                 {
2296                                 /* XXX: For now, we do not support client
2297                                  * authentication using ECDH certificates.
2298                                  * To add such support, one needs to add
2299                                  * code that checks for appropriate 
2300                                  * conditions and sets ecdh_clnt_cert to 1.
2301                                  * For example, the cert have an ECC
2302                                  * key on the same curve as the server's
2303                                  * and the key should be authorized for
2304                                  * key agreement.
2305                                  *
2306                                  * One also needs to add code in ssl3_connect
2307                                  * to skip sending the certificate verify
2308                                  * message.
2309                                  *
2310                                  * if ((s->cert->key->privatekey != NULL) &&
2311                                  *     (s->cert->key->privatekey->type ==
2312                                  *      EVP_PKEY_EC) && ...)
2313                                  * ecdh_clnt_cert = 1;
2314                                  */
2315                                 }
2316
2317                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2318                                 {
2319                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2320                                 }
2321                         else
2322                                 {
2323                                 /* Get the Server Public Key from Cert */
2324                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2325                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2326                                 if ((srvr_pub_pkey == NULL) ||
2327                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2328                                     (srvr_pub_pkey->pkey.ec == NULL))
2329                                         {
2330                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2331                                             ERR_R_INTERNAL_ERROR);
2332                                         goto err;
2333                                         }
2334
2335                                 tkey = srvr_pub_pkey->pkey.ec;
2336                                 }
2337
2338                         srvr_group   = EC_KEY_get0_group(tkey);
2339                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2340
2341                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2342                                 {
2343                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2344                                     ERR_R_INTERNAL_ERROR);
2345                                 goto err;
2346                                 }
2347
2348                         if ((clnt_ecdh=EC_KEY_new()) == NULL) 
2349                                 {
2350                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2351                                 goto err;
2352                                 }
2353
2354                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2355                                 {
2356                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2357                                 goto err;
2358                                 }
2359                         if (ecdh_clnt_cert) 
2360                                 { 
2361                                 /* Reuse key info from our certificate
2362                                  * We only need our private key to perform
2363                                  * the ECDH computation.
2364                                  */
2365                                 const BIGNUM *priv_key;
2366                                 tkey = s->cert->key->privatekey->pkey.ec;
2367                                 priv_key = EC_KEY_get0_private_key(tkey);
2368                                 if (priv_key == NULL)
2369                                         {
2370                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2371                                         goto err;
2372                                         }
2373                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2374                                         {
2375                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2376                                         goto err;
2377                                         }
2378                                 }
2379                         else 
2380                                 {
2381                                 /* Generate a new ECDH key pair */
2382                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2383                                         {
2384                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2385                                         goto err;
2386                                         }
2387                                 }
2388
2389                         /* use the 'p' output buffer for the ECDH key, but
2390                          * make sure to clear it out afterwards
2391                          */
2392
2393                         field_size = EC_GROUP_get_degree(srvr_group);
2394                         if (field_size <= 0)
2395                                 {
2396                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2397                                        ERR_R_ECDH_LIB);
2398                                 goto err;
2399                                 }
2400                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2401                         if (n <= 0)
2402                                 {
2403                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2404                                        ERR_R_ECDH_LIB);
2405                                 goto err;
2406                                 }
2407
2408                         /* generate master key from the result */
2409                         s->session->master_key_length = s->method->ssl3_enc \
2410                             -> generate_master_secret(s, 
2411                                 s->session->master_key,
2412                                 p, n);
2413
2414                         memset(p, 0, n); /* clean up */
2415
2416                         if (ecdh_clnt_cert) 
2417                                 {
2418                                 /* Send empty client key exch message */
2419                                 n = 0;
2420                                 }
2421                         else 
2422                                 {
2423                                 /* First check the size of encoding and
2424                                  * allocate memory accordingly.
2425                                  */
2426                                 encoded_pt_len = 
2427                                     EC_POINT_point2oct(srvr_group, 
2428                                         EC_KEY_get0_public_key(clnt_ecdh), 
2429                                         POINT_CONVERSION_UNCOMPRESSED, 
2430                                         NULL, 0, NULL);
2431
2432                                 encodedPoint = (unsigned char *) 
2433                                     OPENSSL_malloc(encoded_pt_len * 
2434                                         sizeof(unsigned char)); 
2435                                 bn_ctx = BN_CTX_new();
2436                                 if ((encodedPoint == NULL) || 
2437                                     (bn_ctx == NULL)) 
2438                                         {
2439                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2440                                         goto err;
2441                                         }
2442
2443                                 /* Encode the public key */
2444                                 n = EC_POINT_point2oct(srvr_group, 
2445                                     EC_KEY_get0_public_key(clnt_ecdh), 
2446                                     POINT_CONVERSION_UNCOMPRESSED, 
2447                                     encodedPoint, encoded_pt_len, bn_ctx);
2448
2449                                 *p = n; /* length of encoded point */
2450                                 /* Encoded point will be copied here */
2451                                 p += 1; 
2452                                 /* copy the point */
2453                                 memcpy((unsigned char *)p, encodedPoint, n);
2454                                 /* increment n to account for length field */
2455                                 n += 1; 
2456                                 }
2457
2458                         /* Free allocated memory */
2459                         BN_CTX_free(bn_ctx);
2460                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2461                         if (clnt_ecdh != NULL) 
2462                                  EC_KEY_free(clnt_ecdh);
2463                         EVP_PKEY_free(srvr_pub_pkey);
2464                         }
2465 #endif /* !OPENSSL_NO_ECDH */
2466                 else if (alg_k & SSL_kGOST) 
2467                         {
2468                         /* GOST key exchange message creation */
2469                         EVP_PKEY_CTX *pkey_ctx;
2470                         X509 *peer_cert; 
2471                         size_t msglen;
2472                         unsigned int md_len;
2473                         int keytype;
2474                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2475                         EVP_MD_CTX *ukm_hash;
2476                         EVP_PKEY *pub_key;
2477
2478                         /* Get server sertificate PKEY and create ctx from it */
2479                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2480                         if (!peer_cert) 
2481                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2482                         if (!peer_cert)         {
2483                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2484                                         goto err;
2485                                 }       
2486                                 
2487                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2488                         /* If we have send a certificate, and certificate key
2489
2490                          * parameters match those of server certificate, use
2491                          * certificate key for key exchange
2492                          */
2493
2494                          /* Otherwise, generate ephemeral key pair */
2495                                         
2496                         EVP_PKEY_encrypt_init(pkey_ctx);
2497                           /* Generate session key */    
2498                     RAND_bytes(premaster_secret,32);
2499                         /* If we have client certificate, use its secret as peer key */
2500                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2501                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2502                                         /* If there was an error - just ignore it. Ephemeral key
2503                                         * would be used
2504                                         */
2505                                         ERR_clear_error();
2506                                 }
2507                         }                       
2508                         /* Compute shared IV and store it in algorithm-specific
2509                          * context data */
2510                         ukm_hash = EVP_MD_CTX_create();
2511                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2512                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2513                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2514                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2515                         EVP_MD_CTX_destroy(ukm_hash);
2516                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2517                                 8,shared_ukm)<0) {
2518                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2519                                                 SSL_R_LIBRARY_BUG);
2520                                         goto err;
2521                                 }       
2522                         /* Make GOST keytransport blob message */
2523                         /*Encapsulate it into sequence */
2524                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2525                         msglen=255;
2526                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2527                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2528                                         SSL_R_LIBRARY_BUG);
2529                                 goto err;
2530                         }
2531                         if (msglen >= 0x80)
2532                                 {
2533                                 *(p++)=0x81;
2534                                 *(p++)= msglen & 0xff;
2535                                 n=msglen+3;
2536                                 }
2537                         else
2538                                 {
2539                                 *(p++)= msglen & 0xff;
2540                                 n=msglen+2;
2541                                 }
2542                         memcpy(p, tmp, msglen);
2543                         /* Check if pubkey from client certificate was used */
2544                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2545                                 {
2546                                 /* Set flag "skip certificate verify" */
2547                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2548                                 }
2549                         EVP_PKEY_CTX_free(pkey_ctx);
2550                         s->session->master_key_length=
2551                                 s->method->ssl3_enc->generate_master_secret(s,
2552                                         s->session->master_key,premaster_secret,32);
2553                         EVP_PKEY_free(pub_key);
2554
2555                         }
2556 #ifndef OPENSSL_NO_PSK
2557                 else if (alg_k & SSL_kPSK)
2558                         {
2559                         char identity[PSK_MAX_IDENTITY_LEN];
2560                         unsigned char *t = NULL;
2561                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2562                         unsigned int pre_ms_len = 0, psk_len = 0;
2563                         int psk_err = 1;
2564
2565                         n = 0;
2566                         if (s->psk_client_callback == NULL)
2567                                 {
2568                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2569                                         SSL_R_PSK_NO_CLIENT_CB);
2570                                 goto err;
2571                                 }
2572
2573                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2574                                 identity, PSK_MAX_IDENTITY_LEN,
2575                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2576                         if (psk_len > PSK_MAX_PSK_LEN)
2577                                 {
2578                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2579                                         ERR_R_INTERNAL_ERROR);
2580                                 goto psk_err;
2581                                 }
2582                         else if (psk_len == 0)
2583                                 {
2584                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2585                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2586                                 goto psk_err;
2587                                 }
2588
2589                         /* create PSK pre_master_secret */
2590                         pre_ms_len = 2+psk_len+2+psk_len;
2591                         t = psk_or_pre_ms;
2592                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2593                         s2n(psk_len, t);
2594                         memset(t, 0, psk_len);
2595                         t+=psk_len;
2596                         s2n(psk_len, t);
2597
2598                         if (s->session->psk_identity_hint != NULL)
2599                                 OPENSSL_free(s->session->psk_identity_hint);
2600                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2601                         if (s->ctx->psk_identity_hint != NULL &&
2602                                 s->session->psk_identity_hint == NULL)
2603                                 {
2604                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2605                                         ERR_R_MALLOC_FAILURE);
2606                                 goto psk_err;
2607                                 }
2608
2609                         if (s->session->psk_identity != NULL)
2610                                 OPENSSL_free(s->session->psk_identity);
2611                         s->session->psk_identity = BUF_strdup(identity);
2612                         if (s->session->psk_identity == NULL)
2613                                 {
2614                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2615                                         ERR_R_MALLOC_FAILURE);
2616                                 goto psk_err;
2617                                 }
2618
2619                         s->session->master_key_length =
2620                                 s->method->ssl3_enc->generate_master_secret(s,
2621                                         s->session->master_key,
2622                                         psk_or_pre_ms, pre_ms_len); 
2623                         n = strlen(identity);
2624                         s2n(n, p);
2625                         memcpy(p, identity, n);
2626                         n+=2;
2627                         psk_err = 0;
2628                 psk_err:
2629                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2630                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2631                         if (psk_err != 0)
2632                                 {
2633                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2634                                 goto err;
2635                                 }
2636                         }
2637 #endif
2638                 else
2639                         {
2640                         ssl3_send_alert(s, SSL3_AL_FATAL,
2641                             SSL_AD_HANDSHAKE_FAILURE);
2642                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2643                             ERR_R_INTERNAL_ERROR);
2644                         goto err;
2645                         }
2646                 
2647                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2648                 l2n3(n,d);
2649
2650                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2651                 /* number of bytes to write */
2652                 s->init_num=n+4;
2653                 s->init_off=0;
2654                 }
2655
2656         /* SSL3_ST_CW_KEY_EXCH_B */
2657         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2658 err:
2659 #ifndef OPENSSL_NO_ECDH
2660         BN_CTX_free(bn_ctx);
2661         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2662         if (clnt_ecdh != NULL) 
2663                 EC_KEY_free(clnt_ecdh);
2664         EVP_PKEY_free(srvr_pub_pkey);
2665 #endif
2666         return(-1);
2667         }
2668
2669 int ssl3_send_client_verify(SSL *s)
2670         {
2671         unsigned char *p,*d;
2672         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2673         EVP_PKEY *pkey;
2674         EVP_PKEY_CTX *pctx=NULL;
2675 #ifndef OPENSSL_NO_RSA
2676         unsigned u=0;
2677 #endif
2678         unsigned long n;
2679         int j;
2680
2681         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2682                 {
2683                 d=(unsigned char *)s->init_buf->data;
2684                 p= &(d[4]);
2685                 pkey=s->cert->key->privatekey;
2686 /* Create context from key and test if sha1 is allowed as digest */
2687                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2688                 EVP_PKEY_sign_init(pctx);
2689                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2690                         {
2691                         s->method->ssl3_enc->cert_verify_mac(s,
2692                                                 NID_sha1,
2693                                                 &(data[MD5_DIGEST_LENGTH]));
2694                         }
2695                 else
2696                         {
2697                         ERR_clear_error();
2698                         }
2699 #ifndef OPENSSL_NO_RSA
2700                 if (pkey->type == EVP_PKEY_RSA)
2701                         {
2702                         s->method->ssl3_enc->cert_verify_mac(s,
2703                                 NID_md5,
2704                                 &(data[0]));
2705                         if (RSA_sign(NID_md5_sha1, data,
2706                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2707                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2708                                 {
2709                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2710                                 goto err;
2711                                 }
2712                         s2n(u,p);
2713                         n=u+2;
2714                         }
2715                 else
2716 #endif
2717 #ifndef OPENSSL_NO_DSA
2718                         if (pkey->type == EVP_PKEY_DSA)
2719                         {
2720                         if (!DSA_sign(pkey->save_type,
2721                                 &(data[MD5_DIGEST_LENGTH]),
2722                                 SHA_DIGEST_LENGTH,&(p[2]),
2723                                 (unsigned int *)&j,pkey->pkey.dsa))
2724                                 {
2725                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2726                                 goto err;
2727                                 }
2728                         s2n(j,p);
2729                         n=j+2;
2730                         }
2731                 else
2732 #endif
2733 #ifndef OPENSSL_NO_ECDSA
2734                         if (pkey->type == EVP_PKEY_EC)
2735                         {
2736                         if (!ECDSA_sign(pkey->save_type,
2737                                 &(data[MD5_DIGEST_LENGTH]),
2738                                 SHA_DIGEST_LENGTH,&(p[2]),
2739                                 (unsigned int *)&j,pkey->pkey.ec))
2740                                 {
2741                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2742                                     ERR_R_ECDSA_LIB);
2743                                 goto err;
2744                                 }
2745                         s2n(j,p);
2746                         n=j+2;
2747                         }
2748                 else
2749 #endif
2750                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 
2751                 {
2752                 unsigned char signbuf[64];
2753                 int i;
2754                 size_t sigsize=64;
2755                 s->method->ssl3_enc->cert_verify_mac(s,
2756                         NID_id_GostR3411_94,
2757                         data);
2758                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
2759                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2760                         ERR_R_INTERNAL_ERROR);
2761                         goto err;
2762                 }
2763                 for (i=63,j=0; i>=0; j++, i--) {
2764                         p[2+j]=signbuf[i];
2765                 }       
2766                 s2n(j,p);
2767                 n=j+2;
2768                 }
2769                 else
2770                 {
2771                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2772                         goto err;
2773                 }
2774                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2775                 l2n3(n,d);
2776
2777                 s->state=SSL3_ST_CW_CERT_VRFY_B;
2778                 s->init_num=(int)n+4;
2779                 s->init_off=0;
2780                 }
2781         EVP_PKEY_CTX_free(pctx);
2782         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2783 err:
2784         EVP_PKEY_CTX_free(pctx);
2785         return(-1);
2786         }
2787
2788 int ssl3_send_client_certificate(SSL *s)
2789         {
2790         X509 *x509=NULL;
2791         EVP_PKEY *pkey=NULL;
2792         int i;
2793         unsigned long l;
2794
2795         if (s->state == SSL3_ST_CW_CERT_A)
2796                 {
2797                 if ((s->cert == NULL) ||
2798                         (s->cert->key->x509 == NULL) ||
2799                         (s->cert->key->privatekey == NULL))
2800                         s->state=SSL3_ST_CW_CERT_B;
2801                 else
2802                         s->state=SSL3_ST_CW_CERT_C;
2803                 }
2804
2805         /* We need to get a client cert */
2806         if (s->state == SSL3_ST_CW_CERT_B)
2807                 {
2808                 /* If we get an error, we need to
2809                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2810                  * We then get retied later */
2811                 i=0;
2812                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2813                 if (i < 0)
2814                         {
2815                         s->rwstate=SSL_X509_LOOKUP;
2816                         return(-1);
2817                         }
2818                 s->rwstate=SSL_NOTHING;
2819                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2820                         {
2821                         s->state=SSL3_ST_CW_CERT_B;
2822                         if (    !SSL_use_certificate(s,x509) ||
2823                                 !SSL_use_PrivateKey(s,pkey))
2824                                 i=0;
2825                         }
2826                 else if (i == 1)
2827                         {
2828                         i=0;
2829                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2830                         }
2831
2832                 if (x509 != NULL) X509_free(x509);
2833                 if (pkey != NULL) EVP_PKEY_free(pkey);
2834                 if (i == 0)
2835                         {
2836                         if (s->version == SSL3_VERSION)
2837                                 {
2838                                 s->s3->tmp.cert_req=0;
2839                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2840                                 return(1);
2841                                 }
2842                         else
2843                                 {
2844                                 s->s3->tmp.cert_req=2;
2845                                 }
2846                         }
2847
2848                 /* Ok, we have a cert */
2849                 s->state=SSL3_ST_CW_CERT_C;
2850                 }
2851
2852         if (s->state == SSL3_ST_CW_CERT_C)
2853                 {
2854                 s->state=SSL3_ST_CW_CERT_D;
2855                 l=ssl3_output_cert_chain(s,
2856                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2857                 s->init_num=(int)l;
2858                 s->init_off=0;
2859                 }
2860         /* SSL3_ST_CW_CERT_D */
2861         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2862         }
2863
2864 #define has_bits(i,m)   (((i)&(m)) == (m))
2865
2866 int ssl3_check_cert_and_algorithm(SSL *s)
2867         {
2868         int i,idx;
2869         long alg_k,alg_a;
2870         EVP_PKEY *pkey=NULL;
2871         SESS_CERT *sc;
2872 #ifndef OPENSSL_NO_RSA
2873         RSA *rsa;
2874 #endif
2875 #ifndef OPENSSL_NO_DH
2876         DH *dh;
2877 #endif
2878
2879         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2880         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2881
2882         /* we don't have a certificate */
2883         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2884                 return(1);
2885
2886         sc=s->session->sess_cert;
2887         if (sc == NULL)
2888                 {
2889                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2890                 goto err;
2891                 }
2892
2893 #ifndef OPENSSL_NO_RSA
2894         rsa=s->session->sess_cert->peer_rsa_tmp;
2895 #endif
2896 #ifndef OPENSSL_NO_DH
2897         dh=s->session->sess_cert->peer_dh_tmp;
2898 #endif
2899
2900         /* This is the passed certificate */
2901
2902         idx=sc->peer_cert_type;
2903 #ifndef OPENSSL_NO_ECDH
2904         if (idx == SSL_PKEY_ECC)
2905                 {
2906                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2907                     s->s3->tmp.new_cipher) == 0) 
2908                         { /* check failed */
2909                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2910                         goto f_err;
2911                         }
2912                 else 
2913                         {
2914                         return 1;
2915                         }
2916                 }
2917 #endif
2918         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2919         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2920         EVP_PKEY_free(pkey);
2921
2922         
2923         /* Check that we have a certificate if we require one */
2924         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2925                 {
2926                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2927                 goto f_err;
2928                 }
2929 #ifndef OPENSSL_NO_DSA
2930         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2931                 {
2932                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2933                 goto f_err;
2934                 }
2935 #endif
2936 #ifndef OPENSSL_NO_RSA
2937         if ((alg_k & SSL_kRSA) &&
2938                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2939                 {
2940                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2941                 goto f_err;
2942                 }
2943 #endif
2944 #ifndef OPENSSL_NO_DH
2945         if ((alg_k & SSL_kEDH) &&
2946                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2947                 {
2948                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2949                 goto f_err;
2950                 }
2951         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2952                 {
2953                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2954                 goto f_err;
2955                 }
2956 #ifndef OPENSSL_NO_DSA
2957         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2958                 {
2959                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2960                 goto f_err;
2961                 }
2962 #endif
2963 #endif
2964
2965         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2966                 {
2967 #ifndef OPENSSL_NO_RSA
2968                 if (alg_k & SSL_kRSA)
2969                         {
2970                         if (rsa == NULL
2971                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2972                                 {
2973                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2974                                 goto f_err;
2975                                 }
2976                         }
2977                 else
2978 #endif
2979 #ifndef OPENSSL_NO_DH
2980                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2981                             {
2982                             if (dh == NULL
2983                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2984                                 {
2985                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2986                                 goto f_err;
2987                                 }
2988                         }
2989                 else
2990 #endif
2991                         {
2992                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2993                         goto f_err;
2994                         }
2995                 }
2996         return(1);
2997 f_err:
2998         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2999 err:
3000         return(0);
3001         }
3002
3003 /* Check to see if handshake is full or resumed. Usually this is just a
3004  * case of checking to see if a cache hit has occurred. In the case of
3005  * session tickets we have to check the next message to be sure.
3006  */
3007
3008 #ifndef OPENSSL_NO_TLSEXT
3009 int ssl3_check_finished(SSL *s)
3010         {
3011         int ok;
3012         long n;
3013         /* If we have no ticket it cannot be a resumed session. */
3014         if (!s->session->tlsext_tick)
3015                 return 1;
3016         /* this function is called when we really expect a Certificate
3017          * message, so permit appropriate message length */
3018         n=s->method->ssl_get_message(s,
3019                 SSL3_ST_CR_CERT_A,
3020                 SSL3_ST_CR_CERT_B,
3021                 -1,
3022                 s->max_cert_list,
3023                 &ok);
3024         if (!ok) return((int)n);
3025         s->s3->tmp.reuse_message = 1;
3026         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3027                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3028                 return 2;
3029
3030         return 1;
3031         }
3032 #endif
3033
3034 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3035         {
3036         int i = 0;
3037 #ifndef OPENSSL_NO_ENGINE
3038         if (s->ctx->client_cert_engine)
3039                 {
3040                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3041                                                 SSL_get_client_CA_list(s),
3042                                                 px509, ppkey, NULL, NULL, NULL);
3043                 if (i != 0)
3044                         return i;
3045                 }
3046 #endif
3047         if (s->ctx->client_cert_cb)
3048                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3049         return i;
3050         }