compress_meth should be unsigned
[openssl.git] / 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         long num1;
188         void (*cb)(const SSL *ssl,int type,int val)=NULL;
189         int ret= -1;
190         int new_state,state,skip=0;
191
192         RAND_add(&Time,sizeof(Time),0);
193         ERR_clear_error();
194         clear_sys_error();
195
196         if (s->info_callback != NULL)
197                 cb=s->info_callback;
198         else if (s->ctx->info_callback != NULL)
199                 cb=s->ctx->info_callback;
200         
201         s->in_handshake++;
202         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
203
204         for (;;)
205                 {
206                 state=s->state;
207
208                 switch(s->state)
209                         {
210                 case SSL_ST_RENEGOTIATE:
211                         s->new_session=1;
212                         s->state=SSL_ST_CONNECT;
213                         s->ctx->stats.sess_connect_renegotiate++;
214                         /* break */
215                 case SSL_ST_BEFORE:
216                 case SSL_ST_CONNECT:
217                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
218                 case SSL_ST_OK|SSL_ST_CONNECT:
219
220                         s->server=0;
221                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
222
223                         if ((s->version & 0xff00 ) != 0x0300)
224                                 {
225                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
226                                 ret = -1;
227                                 goto end;
228                                 }
229                                 
230                         /* s->version=SSL3_VERSION; */
231                         s->type=SSL_ST_CONNECT;
232
233                         if (s->init_buf == NULL)
234                                 {
235                                 if ((buf=BUF_MEM_new()) == NULL)
236                                         {
237                                         ret= -1;
238                                         goto end;
239                                         }
240                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
241                                         {
242                                         ret= -1;
243                                         goto end;
244                                         }
245                                 s->init_buf=buf;
246                                 buf=NULL;
247                                 }
248
249                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
250
251                         /* setup buffing BIO */
252                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
253
254                         /* don't push the buffering BIO quite yet */
255
256                         ssl3_init_finished_mac(s);
257
258                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
259                         s->ctx->stats.sess_connect++;
260                         s->init_num=0;
261                         break;
262
263                 case SSL3_ST_CW_CLNT_HELLO_A:
264                 case SSL3_ST_CW_CLNT_HELLO_B:
265
266                         s->shutdown=0;
267                         ret=ssl3_client_hello(s);
268                         if (ret <= 0) goto end;
269                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
270                         s->init_num=0;
271
272                         /* turn on buffering for the next lot of output */
273                         if (s->bbio != s->wbio)
274                                 s->wbio=BIO_push(s->bbio,s->wbio);
275
276                         break;
277
278                 case SSL3_ST_CR_SRVR_HELLO_A:
279                 case SSL3_ST_CR_SRVR_HELLO_B:
280                         ret=ssl3_get_server_hello(s);
281                         if (ret <= 0) goto end;
282
283                         if (s->hit)
284                                 s->state=SSL3_ST_CR_FINISHED_A;
285                         else
286                                 s->state=SSL3_ST_CR_CERT_A;
287                         s->init_num=0;
288                         break;
289
290                 case SSL3_ST_CR_CERT_A:
291                 case SSL3_ST_CR_CERT_B:
292 #ifndef OPENSSL_NO_TLSEXT
293                         ret=ssl3_check_finished(s);
294                         if (ret <= 0) goto end;
295                         if (ret == 2)
296                                 {
297                                 s->hit = 1;
298                                 if (s->tlsext_ticket_expected)
299                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
300                                 else
301                                         s->state=SSL3_ST_CR_FINISHED_A;
302                                 s->init_num=0;
303                                 break;
304                                 }
305 #endif
306                         /* Check if it is anon DH/ECDH */
307                         /* or PSK */
308                         if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
309                             !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
310                                 {
311                                 ret=ssl3_get_server_certificate(s);
312                                 if (ret <= 0) goto end;
313 #ifndef OPENSSL_NO_TLSEXT
314                                 if (s->tlsext_status_expected)
315                                         s->state=SSL3_ST_CR_CERT_STATUS_A;
316                                 else
317                                         s->state=SSL3_ST_CR_KEY_EXCH_A;
318                                 }
319                         else
320                                 {
321                                 skip = 1;
322                                 s->state=SSL3_ST_CR_KEY_EXCH_A;
323                                 }
324 #else
325                                 }
326                         else
327                                 skip=1;
328
329                         s->state=SSL3_ST_CR_KEY_EXCH_A;
330 #endif
331                         s->init_num=0;
332                         break;
333
334                 case SSL3_ST_CR_KEY_EXCH_A:
335                 case SSL3_ST_CR_KEY_EXCH_B:
336                         ret=ssl3_get_key_exchange(s);
337                         if (ret <= 0) goto end;
338                         s->state=SSL3_ST_CR_CERT_REQ_A;
339                         s->init_num=0;
340
341                         /* at this point we check that we have the
342                          * required stuff from the server */
343                         if (!ssl3_check_cert_and_algorithm(s))
344                                 {
345                                 ret= -1;
346                                 goto end;
347                                 }
348                         break;
349
350                 case SSL3_ST_CR_CERT_REQ_A:
351                 case SSL3_ST_CR_CERT_REQ_B:
352                         ret=ssl3_get_certificate_request(s);
353                         if (ret <= 0) goto end;
354                         s->state=SSL3_ST_CR_SRVR_DONE_A;
355                         s->init_num=0;
356                         break;
357
358                 case SSL3_ST_CR_SRVR_DONE_A:
359                 case SSL3_ST_CR_SRVR_DONE_B:
360                         ret=ssl3_get_server_done(s);
361                         if (ret <= 0) goto end;
362                         if (s->s3->tmp.cert_req)
363                                 s->state=SSL3_ST_CW_CERT_A;
364                         else
365                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
366                         s->init_num=0;
367
368                         break;
369
370                 case SSL3_ST_CW_CERT_A:
371                 case SSL3_ST_CW_CERT_B:
372                 case SSL3_ST_CW_CERT_C:
373                 case SSL3_ST_CW_CERT_D:
374                         ret=ssl3_send_client_certificate(s);
375                         if (ret <= 0) goto end;
376                         s->state=SSL3_ST_CW_KEY_EXCH_A;
377                         s->init_num=0;
378                         break;
379
380                 case SSL3_ST_CW_KEY_EXCH_A:
381                 case SSL3_ST_CW_KEY_EXCH_B:
382                         ret=ssl3_send_client_key_exchange(s);
383                         if (ret <= 0) goto end;
384                         /* EAY EAY EAY need to check for DH fix cert
385                          * sent back */
386                         /* For TLS, cert_req is set to 2, so a cert chain
387                          * of nothing is sent, but no verify packet is sent */
388                         /* XXX: For now, we do not support client 
389                          * authentication in ECDH cipher suites with
390                          * ECDH (rather than ECDSA) certificates.
391                          * We need to skip the certificate verify 
392                          * message when client's ECDH public key is sent 
393                          * inside the client certificate.
394                          */
395                         if (s->s3->tmp.cert_req == 1)
396                                 {
397                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
398                                 }
399                         else
400                                 {
401                                 s->state=SSL3_ST_CW_CHANGE_A;
402                                 s->s3->change_cipher_spec=0;
403                                 }
404                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
405                                 {
406                                 s->state=SSL3_ST_CW_CHANGE_A;
407                                 s->s3->change_cipher_spec=0;
408                                 }
409
410                         s->init_num=0;
411                         break;
412
413                 case SSL3_ST_CW_CERT_VRFY_A:
414                 case SSL3_ST_CW_CERT_VRFY_B:
415                         ret=ssl3_send_client_verify(s);
416                         if (ret <= 0) goto end;
417                         s->state=SSL3_ST_CW_CHANGE_A;
418                         s->init_num=0;
419                         s->s3->change_cipher_spec=0;
420                         break;
421
422                 case SSL3_ST_CW_CHANGE_A:
423                 case SSL3_ST_CW_CHANGE_B:
424                         ret=ssl3_send_change_cipher_spec(s,
425                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
426                         if (ret <= 0) goto end;
427                         s->state=SSL3_ST_CW_FINISHED_A;
428                         s->init_num=0;
429
430                         s->session->cipher=s->s3->tmp.new_cipher;
431 #ifdef OPENSSL_NO_COMP
432                         s->session->compress_meth=0;
433 #else
434                         if (s->s3->tmp.new_compression == NULL)
435                                 s->session->compress_meth=0;
436                         else
437                                 s->session->compress_meth=
438                                         s->s3->tmp.new_compression->id;
439 #endif
440                         if (!s->method->ssl3_enc->setup_key_block(s))
441                                 {
442                                 ret= -1;
443                                 goto end;
444                                 }
445
446                         if (!s->method->ssl3_enc->change_cipher_state(s,
447                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
448                                 {
449                                 ret= -1;
450                                 goto end;
451                                 }
452
453                         break;
454
455                 case SSL3_ST_CW_FINISHED_A:
456                 case SSL3_ST_CW_FINISHED_B:
457                         ret=ssl3_send_finished(s,
458                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
459                                 s->method->ssl3_enc->client_finished_label,
460                                 s->method->ssl3_enc->client_finished_label_len);
461                         if (ret <= 0) goto end;
462                         s->state=SSL3_ST_CW_FLUSH;
463
464                         /* clear flags */
465                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
466                         if (s->hit)
467                                 {
468                                 s->s3->tmp.next_state=SSL_ST_OK;
469                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
470                                         {
471                                         s->state=SSL_ST_OK;
472                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
473                                         s->s3->delay_buf_pop_ret=0;
474                                         }
475                                 }
476                         else
477                                 {
478 #ifndef OPENSSL_NO_TLSEXT
479                                 /* Allow NewSessionTicket if ticket expected */
480                                 if (s->tlsext_ticket_expected)
481                                         s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
482                                 else
483 #endif
484                                 
485                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
486                                 }
487                         s->init_num=0;
488                         break;
489
490 #ifndef OPENSSL_NO_TLSEXT
491                 case SSL3_ST_CR_SESSION_TICKET_A:
492                 case SSL3_ST_CR_SESSION_TICKET_B:
493                         ret=ssl3_get_new_session_ticket(s);
494                         if (ret <= 0) goto end;
495                         s->state=SSL3_ST_CR_FINISHED_A;
496                         s->init_num=0;
497                 break;
498
499                 case SSL3_ST_CR_CERT_STATUS_A:
500                 case SSL3_ST_CR_CERT_STATUS_B:
501                         ret=ssl3_get_cert_status(s);
502                         if (ret <= 0) goto end;
503                         s->state=SSL3_ST_CR_KEY_EXCH_A;
504                         s->init_num=0;
505                 break;
506 #endif
507
508                 case SSL3_ST_CR_FINISHED_A:
509                 case SSL3_ST_CR_FINISHED_B:
510
511                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
512                                 SSL3_ST_CR_FINISHED_B);
513                         if (ret <= 0) goto end;
514
515                         if (s->hit)
516                                 s->state=SSL3_ST_CW_CHANGE_A;
517                         else
518                                 s->state=SSL_ST_OK;
519                         s->init_num=0;
520                         break;
521
522                 case SSL3_ST_CW_FLUSH:
523                         /* number of bytes to be flushed */
524                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
525                         if (num1 > 0)
526                                 {
527                                 s->rwstate=SSL_WRITING;
528                                 num1=BIO_flush(s->wbio);
529                                 if (num1 <= 0) { ret= -1; goto end; }
530                                 s->rwstate=SSL_NOTHING;
531                                 }
532
533                         s->state=s->s3->tmp.next_state;
534                         break;
535
536                 case SSL_ST_OK:
537                         /* clean a few things up */
538                         ssl3_cleanup_key_block(s);
539
540                         if (s->init_buf != NULL)
541                                 {
542                                 BUF_MEM_free(s->init_buf);
543                                 s->init_buf=NULL;
544                                 }
545
546                         /* If we are not 'joining' the last two packets,
547                          * remove the buffering now */
548                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
549                                 ssl_free_wbio_buffer(s);
550                         /* else do it later in ssl3_write */
551
552                         s->init_num=0;
553                         s->new_session=0;
554
555                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
556                         if (s->hit) s->ctx->stats.sess_hit++;
557
558                         ret=1;
559                         /* s->server=0; */
560                         s->handshake_func=ssl3_connect;
561                         s->ctx->stats.sess_connect_good++;
562
563                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
564
565                         goto end;
566                         /* break; */
567                         
568                 default:
569                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
570                         ret= -1;
571                         goto end;
572                         /* break; */
573                         }
574
575                 /* did we do anything */
576                 if (!s->s3->tmp.reuse_message && !skip)
577                         {
578                         if (s->debug)
579                                 {
580                                 if ((ret=BIO_flush(s->wbio)) <= 0)
581                                         goto end;
582                                 }
583
584                         if ((cb != NULL) && (s->state != state))
585                                 {
586                                 new_state=s->state;
587                                 s->state=state;
588                                 cb(s,SSL_CB_CONNECT_LOOP,1);
589                                 s->state=new_state;
590                                 }
591                         }
592                 skip=0;
593                 }
594 end:
595         s->in_handshake--;
596         if (buf != NULL)
597                 BUF_MEM_free(buf);
598         if (cb != NULL)
599                 cb(s,SSL_CB_CONNECT_EXIT,ret);
600         return(ret);
601         }
602
603
604 int ssl3_client_hello(SSL *s)
605         {
606         unsigned char *buf;
607         unsigned char *p,*d;
608         int i;
609         unsigned long Time,l;
610 #ifndef OPENSSL_NO_COMP
611         int j;
612         SSL_COMP *comp;
613 #endif
614
615         buf=(unsigned char *)s->init_buf->data;
616         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
617                 {
618                 SSL_SESSION *sess = s->session;
619                 if ((sess == NULL) ||
620                         (sess->ssl_version != s->version) ||
621 #ifdef OPENSSL_NO_TLSEXT
622                         !sess->session_id_length ||
623 #else
624                         (!sess->session_id_length && !sess->tlsext_tick) ||
625 #endif
626                         (sess->not_resumable))
627                         {
628                         if (!ssl_get_new_session(s,0))
629                                 goto err;
630                         }
631                 /* else use the pre-loaded session */
632
633                 p=s->s3->client_random;
634                 Time=(unsigned long)time(NULL);                 /* Time */
635                 l2n(Time,p);
636                 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
637                         goto err;
638
639                 /* Do the message type and length last */
640                 d=p= &(buf[4]);
641
642                 *(p++)=s->version>>8;
643                 *(p++)=s->version&0xff;
644                 s->client_version=s->version;
645
646                 /* Random stuff */
647                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
648                 p+=SSL3_RANDOM_SIZE;
649
650                 /* Session ID */
651                 if (s->new_session)
652                         i=0;
653                 else
654                         i=s->session->session_id_length;
655                 *(p++)=i;
656                 if (i != 0)
657                         {
658                         if (i > (int)sizeof(s->session->session_id))
659                                 {
660                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
661                                 goto err;
662                                 }
663                         memcpy(p,s->session->session_id,i);
664                         p+=i;
665                         }
666                 
667                 /* Ciphers supported */
668                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
669                 if (i == 0)
670                         {
671                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
672                         goto err;
673                         }
674                 s2n(i,p);
675                 p+=i;
676
677                 /* COMPRESSION */
678 #ifdef OPENSSL_NO_COMP
679                 *(p++)=1;
680 #else
681
682                 if ((s->options & SSL_OP_NO_COMPRESSION)
683                                         || !s->ctx->comp_methods)
684                         j=0;
685                 else
686                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
687                 *(p++)=1+j;
688                 for (i=0; i<j; i++)
689                         {
690                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
691                         *(p++)=comp->id;
692                         }
693 #endif
694                 *(p++)=0; /* Add the NULL method */
695
696 #ifndef OPENSSL_NO_TLSEXT
697                 /* TLS extensions*/
698                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
699                         {
700                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
701                         goto err;
702                         }
703                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
704                         {
705                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
706                         goto err;
707                         }
708 #endif
709                 
710                 l=(p-d);
711                 d=buf;
712                 *(d++)=SSL3_MT_CLIENT_HELLO;
713                 l2n3(l,d);
714
715                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
716                 /* number of bytes to write */
717                 s->init_num=p-buf;
718                 s->init_off=0;
719                 }
720
721         /* SSL3_ST_CW_CLNT_HELLO_B */
722         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
723 err:
724         return(-1);
725         }
726
727 int ssl3_get_server_hello(SSL *s)
728         {
729         STACK_OF(SSL_CIPHER) *sk;
730         const SSL_CIPHER *c;
731         unsigned char *p,*d;
732         int i,al,ok;
733         unsigned int j;
734         long n;
735 #ifndef OPENSSL_NO_COMP
736         SSL_COMP *comp;
737 #endif
738
739         n=s->method->ssl_get_message(s,
740                 SSL3_ST_CR_SRVR_HELLO_A,
741                 SSL3_ST_CR_SRVR_HELLO_B,
742                 -1,
743                 20000, /* ?? */
744                 &ok);
745
746         if (!ok) return((int)n);
747
748         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
749                 {
750                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
751                         {
752                         if ( s->d1->send_cookie == 0)
753                                 {
754                                 s->s3->tmp.reuse_message = 1;
755                                 return 1;
756                                 }
757                         else /* already sent a cookie */
758                                 {
759                                 al=SSL_AD_UNEXPECTED_MESSAGE;
760                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
761                                 goto f_err;
762                                 }
763                         }
764                 }
765         
766         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
767                 {
768                 al=SSL_AD_UNEXPECTED_MESSAGE;
769                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
770                 goto f_err;
771                 }
772
773         d=p=(unsigned char *)s->init_msg;
774
775         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
776                 {
777                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
778                 s->version=(s->version&0xff00)|p[1];
779                 al=SSL_AD_PROTOCOL_VERSION;
780                 goto f_err;
781                 }
782         p+=2;
783
784         /* load the server hello data */
785         /* load the server random */
786         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
787         p+=SSL3_RANDOM_SIZE;
788
789         /* get the session-id */
790         j= *(p++);
791
792         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
793                 {
794                 al=SSL_AD_ILLEGAL_PARAMETER;
795                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
796                 goto f_err;
797                 }
798
799 #ifndef OPENSSL_NO_TLSEXT
800         /* check if we want to resume the session based on external pre-shared secret */
801         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
802                 {
803                 SSL_CIPHER *pref_cipher=NULL;
804                 s->session->master_key_length=sizeof(s->session->master_key);
805                 if (s->tls_session_secret_cb(s, s->session->master_key,
806                                              &s->session->master_key_length,
807                                              NULL, &pref_cipher,
808                                              s->tls_session_secret_cb_arg))
809                         {
810                         s->session->cipher = pref_cipher ?
811                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
812                         }
813                 }
814 #endif /* OPENSSL_NO_TLSEXT */
815
816         if (j != 0 && j == s->session->session_id_length
817             && memcmp(p,s->session->session_id,j) == 0)
818             {
819             if(s->sid_ctx_length != s->session->sid_ctx_length
820                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
821                 {
822                 /* actually a client application bug */
823                 al=SSL_AD_ILLEGAL_PARAMETER;
824                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
825                 goto f_err;
826                 }
827             s->hit=1;
828             }
829         else    /* a miss or crap from the other end */
830                 {
831                 /* If we were trying for session-id reuse, make a new
832                  * SSL_SESSION so we don't stuff up other people */
833                 s->hit=0;
834                 if (s->session->session_id_length > 0)
835                         {
836                         if (!ssl_get_new_session(s,0))
837                                 {
838                                 al=SSL_AD_INTERNAL_ERROR;
839                                 goto f_err;
840                                 }
841                         }
842                 s->session->session_id_length=j;
843                 memcpy(s->session->session_id,p,j); /* j could be 0 */
844                 }
845         p+=j;
846         c=ssl_get_cipher_by_char(s,p);
847         if (c == NULL)
848                 {
849                 /* unknown cipher */
850                 al=SSL_AD_ILLEGAL_PARAMETER;
851                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
852                 goto f_err;
853                 }
854         p+=ssl_put_cipher_by_char(s,NULL,NULL);
855
856         sk=ssl_get_ciphers_by_id(s);
857         i=sk_SSL_CIPHER_find(sk,c);
858         if (i < 0)
859                 {
860                 /* we did not say we would use this cipher */
861                 al=SSL_AD_ILLEGAL_PARAMETER;
862                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
863                 goto f_err;
864                 }
865
866         /* Depending on the session caching (internal/external), the cipher
867            and/or cipher_id values may not be set. Make sure that
868            cipher_id is set and use it for comparison. */
869         if (s->session->cipher)
870                 s->session->cipher_id = s->session->cipher->id;
871         if (s->hit && (s->session->cipher_id != c->id))
872                 {
873                 if (!(s->options &
874                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
875                         {
876                         al=SSL_AD_ILLEGAL_PARAMETER;
877                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
878                         goto f_err;
879                         }
880                 }
881         s->s3->tmp.new_cipher=c;
882         if (!ssl3_digest_cached_records(s))
883                 goto f_err;
884
885         /* lets get the compression algorithm */
886         /* COMPRESSION */
887 #ifdef OPENSSL_NO_COMP
888         if (*(p++) != 0)
889                 {
890                 al=SSL_AD_ILLEGAL_PARAMETER;
891                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
892                 goto f_err;
893                 }
894         /* If compression is disabled we'd better not try to resume a session
895          * using compression.
896          */
897         if (s->session->compress_meth != 0)
898                 {
899                 al=SSL_AD_INTERNAL_ERROR;
900                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
901                 goto f_err;
902                 }
903 #else
904         j= *(p++);
905         if (s->hit && j != s->session->compress_meth)
906                 {
907                 al=SSL_AD_ILLEGAL_PARAMETER;
908                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
909                 goto f_err;
910                 }
911         if (j == 0)
912                 comp=NULL;
913         else if (s->options & SSL_OP_NO_COMPRESSION)
914                 {
915                 al=SSL_AD_ILLEGAL_PARAMETER;
916                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
917                 goto f_err;
918                 }
919         else
920                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
921         
922         if ((j != 0) && (comp == NULL))
923                 {
924                 al=SSL_AD_ILLEGAL_PARAMETER;
925                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
926                 goto f_err;
927                 }
928         else
929                 {
930                 s->s3->tmp.new_compression=comp;
931                 }
932 #endif
933
934 #ifndef OPENSSL_NO_TLSEXT
935         /* TLS extensions*/
936         if (s->version >= SSL3_VERSION)
937                 {
938                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
939                         {
940                         /* 'al' set by ssl_parse_serverhello_tlsext */
941                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
942                         goto f_err; 
943                         }
944                 if (ssl_check_serverhello_tlsext(s) <= 0)
945                         {
946                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
947                                 goto err;
948                         }
949                 }
950 #endif
951
952         if (p != (d+n))
953                 {
954                 /* wrong packet length */
955                 al=SSL_AD_DECODE_ERROR;
956                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
957                 goto err;
958                 }
959
960         return(1);
961 f_err:
962         ssl3_send_alert(s,SSL3_AL_FATAL,al);
963 err:
964         return(-1);
965         }
966
967 int ssl3_get_server_certificate(SSL *s)
968         {
969         int al,i,ok,ret= -1;
970         unsigned long n,nc,llen,l;
971         X509 *x=NULL;
972         const unsigned char *q,*p;
973         unsigned char *d;
974         STACK_OF(X509) *sk=NULL;
975         SESS_CERT *sc;
976         EVP_PKEY *pkey=NULL;
977         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
978
979         n=s->method->ssl_get_message(s,
980                 SSL3_ST_CR_CERT_A,
981                 SSL3_ST_CR_CERT_B,
982                 -1,
983                 s->max_cert_list,
984                 &ok);
985
986         if (!ok) return((int)n);
987
988         if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
989                 {
990                 s->s3->tmp.reuse_message=1;
991                 return(1);
992                 }
993
994         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
995                 {
996                 al=SSL_AD_UNEXPECTED_MESSAGE;
997                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
998                 goto f_err;
999                 }
1000         p=d=(unsigned char *)s->init_msg;
1001
1002         if ((sk=sk_X509_new_null()) == NULL)
1003                 {
1004                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1005                 goto err;
1006                 }
1007
1008         n2l3(p,llen);
1009         if (llen+3 != n)
1010                 {
1011                 al=SSL_AD_DECODE_ERROR;
1012                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1013                 goto f_err;
1014                 }
1015         for (nc=0; nc<llen; )
1016                 {
1017                 n2l3(p,l);
1018                 if ((l+nc+3) > llen)
1019                         {
1020                         al=SSL_AD_DECODE_ERROR;
1021                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1022                         goto f_err;
1023                         }
1024
1025                 q=p;
1026                 x=d2i_X509(NULL,&q,l);
1027                 if (x == NULL)
1028                         {
1029                         al=SSL_AD_BAD_CERTIFICATE;
1030                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1031                         goto f_err;
1032                         }
1033                 if (q != (p+l))
1034                         {
1035                         al=SSL_AD_DECODE_ERROR;
1036                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1037                         goto f_err;
1038                         }
1039                 if (!sk_X509_push(sk,x))
1040                         {
1041                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1042                         goto err;
1043                         }
1044                 x=NULL;
1045                 nc+=l+3;
1046                 p=q;
1047                 }
1048
1049         i=ssl_verify_cert_chain(s,sk);
1050         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1051 #ifndef OPENSSL_NO_KRB5
1052             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1053                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1054 #endif /* OPENSSL_NO_KRB5 */
1055                 )
1056                 {
1057                 al=ssl_verify_alarm_type(s->verify_result);
1058                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1059                 goto f_err; 
1060                 }
1061         ERR_clear_error(); /* but we keep s->verify_result */
1062
1063         sc=ssl_sess_cert_new();
1064         if (sc == NULL) goto err;
1065
1066         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1067         s->session->sess_cert=sc;
1068
1069         sc->cert_chain=sk;
1070         /* Inconsistency alert: cert_chain does include the peer's
1071          * certificate, which we don't include in s3_srvr.c */
1072         x=sk_X509_value(sk,0);
1073         sk=NULL;
1074         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1075
1076         pkey=X509_get_pubkey(x);
1077
1078         /* VRS: allow null cert if auth == KRB5 */
1079         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1080                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1081                     ? 0 : 1;
1082
1083 #ifdef KSSL_DEBUG
1084         printf("pkey,x = %p, %p\n", pkey,x);
1085         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1086         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1087                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1088 #endif    /* KSSL_DEBUG */
1089
1090         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1091                 {
1092                 x=NULL;
1093                 al=SSL3_AL_FATAL;
1094                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1095                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1096                 goto f_err;
1097                 }
1098
1099         i=ssl_cert_type(x,pkey);
1100         if (need_cert && i < 0)
1101                 {
1102                 x=NULL;
1103                 al=SSL3_AL_FATAL;
1104                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1105                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1106                 goto f_err;
1107                 }
1108
1109         if (need_cert)
1110                 {
1111                 sc->peer_cert_type=i;
1112                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1113                 /* Why would the following ever happen?
1114                  * We just created sc a couple of lines ago. */
1115                 if (sc->peer_pkeys[i].x509 != NULL)
1116                         X509_free(sc->peer_pkeys[i].x509);
1117                 sc->peer_pkeys[i].x509=x;
1118                 sc->peer_key= &(sc->peer_pkeys[i]);
1119
1120                 if (s->session->peer != NULL)
1121                         X509_free(s->session->peer);
1122                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1123                 s->session->peer=x;
1124                 }
1125         else
1126                 {
1127                 sc->peer_cert_type=i;
1128                 sc->peer_key= NULL;
1129
1130                 if (s->session->peer != NULL)
1131                         X509_free(s->session->peer);
1132                 s->session->peer=NULL;
1133                 }
1134         s->session->verify_result = s->verify_result;
1135
1136         x=NULL;
1137         ret=1;
1138
1139         if (0)
1140                 {
1141 f_err:
1142                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1143                 }
1144 err:
1145         EVP_PKEY_free(pkey);
1146         X509_free(x);
1147         sk_X509_pop_free(sk,X509_free);
1148         return(ret);
1149         }
1150
1151 int ssl3_get_key_exchange(SSL *s)
1152         {
1153 #ifndef OPENSSL_NO_RSA
1154         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1155 #endif
1156         EVP_MD_CTX md_ctx;
1157         unsigned char *param,*p;
1158         int al,i,j,param_len,ok;
1159         long n,alg_k,alg_a;
1160         EVP_PKEY *pkey=NULL;
1161 #ifndef OPENSSL_NO_RSA
1162         RSA *rsa=NULL;
1163 #endif
1164 #ifndef OPENSSL_NO_DH
1165         DH *dh=NULL;
1166 #endif
1167 #ifndef OPENSSL_NO_ECDH
1168         EC_KEY *ecdh = NULL;
1169         BN_CTX *bn_ctx = NULL;
1170         EC_POINT *srvr_ecpoint = NULL;
1171         int curve_nid = 0;
1172         int encoded_pt_len = 0;
1173 #endif
1174
1175         /* use same message size as in ssl3_get_certificate_request()
1176          * as ServerKeyExchange message may be skipped */
1177         n=s->method->ssl_get_message(s,
1178                 SSL3_ST_CR_KEY_EXCH_A,
1179                 SSL3_ST_CR_KEY_EXCH_B,
1180                 -1,
1181                 s->max_cert_list,
1182                 &ok);
1183         if (!ok) return((int)n);
1184
1185         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1186                 {
1187 #ifndef OPENSSL_NO_PSK
1188                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1189                    omitted if no identity hint is sent. Set
1190                    session->sess_cert anyway to avoid problems
1191                    later.*/
1192                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1193                         {
1194                         s->session->sess_cert=ssl_sess_cert_new();
1195                         if (s->ctx->psk_identity_hint)
1196                                 OPENSSL_free(s->ctx->psk_identity_hint);
1197                         s->ctx->psk_identity_hint = NULL;
1198                         }
1199 #endif
1200                 s->s3->tmp.reuse_message=1;
1201                 return(1);
1202                 }
1203
1204         param=p=(unsigned char *)s->init_msg;
1205         if (s->session->sess_cert != NULL)
1206                 {
1207 #ifndef OPENSSL_NO_RSA
1208                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1209                         {
1210                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1211                         s->session->sess_cert->peer_rsa_tmp=NULL;
1212                         }
1213 #endif
1214 #ifndef OPENSSL_NO_DH
1215                 if (s->session->sess_cert->peer_dh_tmp)
1216                         {
1217                         DH_free(s->session->sess_cert->peer_dh_tmp);
1218                         s->session->sess_cert->peer_dh_tmp=NULL;
1219                         }
1220 #endif
1221 #ifndef OPENSSL_NO_ECDH
1222                 if (s->session->sess_cert->peer_ecdh_tmp)
1223                         {
1224                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1225                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1226                         }
1227 #endif
1228                 }
1229         else
1230                 {
1231                 s->session->sess_cert=ssl_sess_cert_new();
1232                 }
1233
1234         param_len=0;
1235         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1236         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1237         EVP_MD_CTX_init(&md_ctx);
1238
1239 #ifndef OPENSSL_NO_PSK
1240         if (alg_k & SSL_kPSK)
1241                 {
1242                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1243
1244                 al=SSL_AD_HANDSHAKE_FAILURE;
1245                 n2s(p,i);
1246                 param_len=i+2;
1247                 /* Store PSK identity hint for later use, hint is used
1248                  * in ssl3_send_client_key_exchange.  Assume that the
1249                  * maximum length of a PSK identity hint can be as
1250                  * long as the maximum length of a PSK identity. */
1251                 if (i > PSK_MAX_IDENTITY_LEN)
1252                         {
1253                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1254                                 SSL_R_DATA_LENGTH_TOO_LONG);
1255                         goto f_err;
1256                         }
1257                 if (param_len > n)
1258                         {
1259                         al=SSL_AD_DECODE_ERROR;
1260                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1261                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1262                         goto f_err;
1263                         }
1264                 /* If received PSK identity hint contains NULL
1265                  * characters, the hint is truncated from the first
1266                  * NULL. p may not be ending with NULL, so create a
1267                  * NULL-terminated string. */
1268                 memcpy(tmp_id_hint, p, i);
1269                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1270                 if (s->ctx->psk_identity_hint != NULL)
1271                         OPENSSL_free(s->ctx->psk_identity_hint);
1272                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1273                 if (s->ctx->psk_identity_hint == NULL)
1274                         {
1275                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1276                         goto f_err;
1277                         }          
1278
1279                 p+=i;
1280                 n-=param_len;
1281                 }
1282         else
1283 #endif /* !OPENSSL_NO_PSK */
1284 #ifndef OPENSSL_NO_RSA
1285         if (alg_k & SSL_kRSA)
1286                 {
1287                 if ((rsa=RSA_new()) == NULL)
1288                         {
1289                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1290                         goto err;
1291                         }
1292                 n2s(p,i);
1293                 param_len=i+2;
1294                 if (param_len > n)
1295                         {
1296                         al=SSL_AD_DECODE_ERROR;
1297                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1298                         goto f_err;
1299                         }
1300                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1301                         {
1302                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1303                         goto err;
1304                         }
1305                 p+=i;
1306
1307                 n2s(p,i);
1308                 param_len+=i+2;
1309                 if (param_len > n)
1310                         {
1311                         al=SSL_AD_DECODE_ERROR;
1312                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1313                         goto f_err;
1314                         }
1315                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1316                         {
1317                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1318                         goto err;
1319                         }
1320                 p+=i;
1321                 n-=param_len;
1322
1323                 /* this should be because we are using an export cipher */
1324                 if (alg_a & SSL_aRSA)
1325                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1326                 else
1327                         {
1328                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1329                         goto err;
1330                         }
1331                 s->session->sess_cert->peer_rsa_tmp=rsa;
1332                 rsa=NULL;
1333                 }
1334 #else /* OPENSSL_NO_RSA */
1335         if (0)
1336                 ;
1337 #endif
1338 #ifndef OPENSSL_NO_DH
1339         else if (alg_k & SSL_kEDH)
1340                 {
1341                 if ((dh=DH_new()) == NULL)
1342                         {
1343                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1344                         goto err;
1345                         }
1346                 n2s(p,i);
1347                 param_len=i+2;
1348                 if (param_len > n)
1349                         {
1350                         al=SSL_AD_DECODE_ERROR;
1351                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1352                         goto f_err;
1353                         }
1354                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1355                         {
1356                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1357                         goto err;
1358                         }
1359                 p+=i;
1360
1361                 n2s(p,i);
1362                 param_len+=i+2;
1363                 if (param_len > n)
1364                         {
1365                         al=SSL_AD_DECODE_ERROR;
1366                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1367                         goto f_err;
1368                         }
1369                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1370                         {
1371                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1372                         goto err;
1373                         }
1374                 p+=i;
1375
1376                 n2s(p,i);
1377                 param_len+=i+2;
1378                 if (param_len > n)
1379                         {
1380                         al=SSL_AD_DECODE_ERROR;
1381                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1382                         goto f_err;
1383                         }
1384                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1385                         {
1386                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1387                         goto err;
1388                         }
1389                 p+=i;
1390                 n-=param_len;
1391
1392 #ifndef OPENSSL_NO_RSA
1393                 if (alg_a & SSL_aRSA)
1394                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1395 #else
1396                 if (0)
1397                         ;
1398 #endif
1399 #ifndef OPENSSL_NO_DSA
1400                 else if (alg_a & SSL_aDSS)
1401                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1402 #endif
1403                 /* else anonymous DH, so no certificate or pkey. */
1404
1405                 s->session->sess_cert->peer_dh_tmp=dh;
1406                 dh=NULL;
1407                 }
1408         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1409                 {
1410                 al=SSL_AD_ILLEGAL_PARAMETER;
1411                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1412                 goto f_err;
1413                 }
1414 #endif /* !OPENSSL_NO_DH */
1415
1416 #ifndef OPENSSL_NO_ECDH
1417         else if (alg_k & SSL_kEECDH)
1418                 {
1419                 EC_GROUP *ngroup;
1420                 const EC_GROUP *group;
1421
1422                 if ((ecdh=EC_KEY_new()) == NULL)
1423                         {
1424                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1425                         goto err;
1426                         }
1427
1428                 /* Extract elliptic curve parameters and the
1429                  * server's ephemeral ECDH public key.
1430                  * Keep accumulating lengths of various components in
1431                  * param_len and make sure it never exceeds n.
1432                  */
1433
1434                 /* XXX: For now we only support named (not generic) curves
1435                  * and the ECParameters in this case is just three bytes.
1436                  */
1437                 param_len=3;
1438                 if ((param_len > n) ||
1439                     (*p != NAMED_CURVE_TYPE) || 
1440                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 
1441                         {
1442                         al=SSL_AD_INTERNAL_ERROR;
1443                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1444                         goto f_err;
1445                         }
1446
1447                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1448                 if (ngroup == NULL)
1449                         {
1450                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1451                         goto err;
1452                         }
1453                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1454                         {
1455                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1456                         goto err;
1457                         }
1458                 EC_GROUP_free(ngroup);
1459
1460                 group = EC_KEY_get0_group(ecdh);
1461
1462                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1463                     (EC_GROUP_get_degree(group) > 163))
1464                         {
1465                         al=SSL_AD_EXPORT_RESTRICTION;
1466                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1467                         goto f_err;
1468                         }
1469
1470                 p+=3;
1471
1472                 /* Next, get the encoded ECPoint */
1473                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1474                     ((bn_ctx = BN_CTX_new()) == NULL))
1475                         {
1476                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1477                         goto err;
1478                         }
1479
1480                 encoded_pt_len = *p;  /* length of encoded point */
1481                 p+=1;
1482                 param_len += (1 + encoded_pt_len);
1483                 if ((param_len > n) ||
1484                     (EC_POINT_oct2point(group, srvr_ecpoint, 
1485                         p, encoded_pt_len, bn_ctx) == 0))
1486                         {
1487                         al=SSL_AD_DECODE_ERROR;
1488                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1489                         goto f_err;
1490                         }
1491
1492                 n-=param_len;
1493                 p+=encoded_pt_len;
1494
1495                 /* The ECC/TLS specification does not mention
1496                  * the use of DSA to sign ECParameters in the server
1497                  * key exchange message. We do support RSA and ECDSA.
1498                  */
1499                 if (0) ;
1500 #ifndef OPENSSL_NO_RSA
1501                 else if (alg_a & SSL_aRSA)
1502                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1503 #endif
1504 #ifndef OPENSSL_NO_ECDSA
1505                 else if (alg_a & SSL_aECDSA)
1506                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1507 #endif
1508                 /* else anonymous ECDH, so no certificate or pkey. */
1509                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1510                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1511                 ecdh=NULL;
1512                 BN_CTX_free(bn_ctx);
1513                 EC_POINT_free(srvr_ecpoint);
1514                 srvr_ecpoint = NULL;
1515                 }
1516         else if (alg_k)
1517                 {
1518                 al=SSL_AD_UNEXPECTED_MESSAGE;
1519                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1520                 goto f_err;
1521                 }
1522 #endif /* !OPENSSL_NO_ECDH */
1523
1524
1525         /* p points to the next byte, there are 'n' bytes left */
1526
1527         /* if it was signed, check the signature */
1528         if (pkey != NULL)
1529                 {
1530                 n2s(p,i);
1531                 n-=2;
1532                 j=EVP_PKEY_size(pkey);
1533
1534                 if ((i != n) || (n > j) || (n <= 0))
1535                         {
1536                         /* wrong packet length */
1537                         al=SSL_AD_DECODE_ERROR;
1538                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1539                         goto f_err;
1540                         }
1541
1542 #ifndef OPENSSL_NO_RSA
1543                 if (pkey->type == EVP_PKEY_RSA)
1544                         {
1545                         int num;
1546
1547                         j=0;
1548                         q=md_buf;
1549                         for (num=2; num > 0; num--)
1550                                 {
1551                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1552                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1553                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1554                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1555                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1556                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1557                                 q+=i;
1558                                 j+=i;
1559                                 }
1560                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1561                                                                 pkey->pkey.rsa);
1562                         if (i < 0)
1563                                 {
1564                                 al=SSL_AD_DECRYPT_ERROR;
1565                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1566                                 goto f_err;
1567                                 }
1568                         if (i == 0)
1569                                 {
1570                                 /* bad signature */
1571                                 al=SSL_AD_DECRYPT_ERROR;
1572                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1573                                 goto f_err;
1574                                 }
1575                         }
1576                 else
1577 #endif
1578 #ifndef OPENSSL_NO_DSA
1579                         if (pkey->type == EVP_PKEY_DSA)
1580                         {
1581                         /* lets do DSS */
1582                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1583                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1584                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1585                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1586                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1587                                 {
1588                                 /* bad signature */
1589                                 al=SSL_AD_DECRYPT_ERROR;
1590                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1591                                 goto f_err;
1592                                 }
1593                         }
1594                 else
1595 #endif
1596 #ifndef OPENSSL_NO_ECDSA
1597                         if (pkey->type == EVP_PKEY_EC)
1598                         {
1599                         /* let's do ECDSA */
1600                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1601                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1602                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1603                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1604                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1605                                 {
1606                                 /* bad signature */
1607                                 al=SSL_AD_DECRYPT_ERROR;
1608                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1609                                 goto f_err;
1610                                 }
1611                         }
1612                 else
1613 #endif
1614                         {
1615                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1616                         goto err;
1617                         }
1618                 }
1619         else
1620                 {
1621                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1622                         /* aNULL or kPSK do not need public keys */
1623                         {
1624                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1625                         goto err;
1626                         }
1627                 /* still data left over */
1628                 if (n != 0)
1629                         {
1630                         al=SSL_AD_DECODE_ERROR;
1631                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1632                         goto f_err;
1633                         }
1634                 }
1635         EVP_PKEY_free(pkey);
1636         EVP_MD_CTX_cleanup(&md_ctx);
1637         return(1);
1638 f_err:
1639         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1640 err:
1641         EVP_PKEY_free(pkey);
1642 #ifndef OPENSSL_NO_RSA
1643         if (rsa != NULL)
1644                 RSA_free(rsa);
1645 #endif
1646 #ifndef OPENSSL_NO_DH
1647         if (dh != NULL)
1648                 DH_free(dh);
1649 #endif
1650 #ifndef OPENSSL_NO_ECDH
1651         BN_CTX_free(bn_ctx);
1652         EC_POINT_free(srvr_ecpoint);
1653         if (ecdh != NULL)
1654                 EC_KEY_free(ecdh);
1655 #endif
1656         EVP_MD_CTX_cleanup(&md_ctx);
1657         return(-1);
1658         }
1659
1660 int ssl3_get_certificate_request(SSL *s)
1661         {
1662         int ok,ret=0;
1663         unsigned long n,nc,l;
1664         unsigned int llen,ctype_num,i;
1665         X509_NAME *xn=NULL;
1666         const unsigned char *p,*q;
1667         unsigned char *d;
1668         STACK_OF(X509_NAME) *ca_sk=NULL;
1669
1670         n=s->method->ssl_get_message(s,
1671                 SSL3_ST_CR_CERT_REQ_A,
1672                 SSL3_ST_CR_CERT_REQ_B,
1673                 -1,
1674                 s->max_cert_list,
1675                 &ok);
1676
1677         if (!ok) return((int)n);
1678
1679         s->s3->tmp.cert_req=0;
1680
1681         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1682                 {
1683                 s->s3->tmp.reuse_message=1;
1684                 return(1);
1685                 }
1686
1687         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1688                 {
1689                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1690                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1691                 goto err;
1692                 }
1693
1694         /* TLS does not like anon-DH with client cert */
1695         if (s->version > SSL3_VERSION)
1696                 {
1697                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1698                         {
1699                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1700                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1701                         goto err;
1702                         }
1703                 }
1704
1705         p=d=(unsigned char *)s->init_msg;
1706
1707         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1708                 {
1709                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1710                 goto err;
1711                 }
1712
1713         /* get the certificate types */
1714         ctype_num= *(p++);
1715         if (ctype_num > SSL3_CT_NUMBER)
1716                 ctype_num=SSL3_CT_NUMBER;
1717         for (i=0; i<ctype_num; i++)
1718                 s->s3->tmp.ctype[i]= p[i];
1719         p+=ctype_num;
1720
1721         /* get the CA RDNs */
1722         n2s(p,llen);
1723 #if 0
1724 {
1725 FILE *out;
1726 out=fopen("/tmp/vsign.der","w");
1727 fwrite(p,1,llen,out);
1728 fclose(out);
1729 }
1730 #endif
1731
1732         if ((llen+ctype_num+2+1) != n)
1733                 {
1734                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1735                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1736                 goto err;
1737                 }
1738
1739         for (nc=0; nc<llen; )
1740                 {
1741                 n2s(p,l);
1742                 if ((l+nc+2) > llen)
1743                         {
1744                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1745                                 goto cont; /* netscape bugs */
1746                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1747                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1748                         goto err;
1749                         }
1750
1751                 q=p;
1752
1753                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1754                         {
1755                         /* If netscape tolerance is on, ignore errors */
1756                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1757                                 goto cont;
1758                         else
1759                                 {
1760                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1761                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1762                                 goto err;
1763                                 }
1764                         }
1765
1766                 if (q != (p+l))
1767                         {
1768                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1769                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1770                         goto err;
1771                         }
1772                 if (!sk_X509_NAME_push(ca_sk,xn))
1773                         {
1774                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1775                         goto err;
1776                         }
1777
1778                 p+=l;
1779                 nc+=l+2;
1780                 }
1781
1782         if (0)
1783                 {
1784 cont:
1785                 ERR_clear_error();
1786                 }
1787
1788         /* we should setup a certificate to return.... */
1789         s->s3->tmp.cert_req=1;
1790         s->s3->tmp.ctype_num=ctype_num;
1791         if (s->s3->tmp.ca_names != NULL)
1792                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1793         s->s3->tmp.ca_names=ca_sk;
1794         ca_sk=NULL;
1795
1796         ret=1;
1797 err:
1798         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1799         return(ret);
1800         }
1801
1802 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1803         {
1804         return(X509_NAME_cmp(*a,*b));
1805         }
1806 #ifndef OPENSSL_NO_TLSEXT
1807 int ssl3_get_new_session_ticket(SSL *s)
1808         {
1809         int ok,al,ret=0, ticklen;
1810         long n;
1811         const unsigned char *p;
1812         unsigned char *d;
1813
1814         n=s->method->ssl_get_message(s,
1815                 SSL3_ST_CR_SESSION_TICKET_A,
1816                 SSL3_ST_CR_SESSION_TICKET_B,
1817                 -1,
1818                 16384,
1819                 &ok);
1820
1821         if (!ok)
1822                 return((int)n);
1823
1824         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1825                 {
1826                 s->s3->tmp.reuse_message=1;
1827                 return(1);
1828                 }
1829         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1830                 {
1831                 al=SSL_AD_UNEXPECTED_MESSAGE;
1832                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1833                 goto f_err;
1834                 }
1835         if (n < 6)
1836                 {
1837                 /* need at least ticket_lifetime_hint + ticket length */
1838                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1839                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1840                 goto f_err;
1841                 }
1842
1843         p=d=(unsigned char *)s->init_msg;
1844         n2l(p, s->session->tlsext_tick_lifetime_hint);
1845         n2s(p, ticklen);
1846         /* ticket_lifetime_hint + ticket_length + ticket */
1847         if (ticklen + 6 != n)
1848                 {
1849                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1850                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1851                 goto f_err;
1852                 }
1853         if (s->session->tlsext_tick)
1854                 {
1855                 OPENSSL_free(s->session->tlsext_tick);
1856                 s->session->tlsext_ticklen = 0;
1857                 }
1858         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1859         if (!s->session->tlsext_tick)
1860                 {
1861                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1862                 goto err;
1863                 }
1864         memcpy(s->session->tlsext_tick, p, ticklen);
1865         s->session->tlsext_ticklen = ticklen;
1866         /* There are two ways to detect a resumed ticket sesion.
1867          * One is to set an appropriate session ID and then the server
1868          * must return a match in ServerHello. This allows the normal
1869          * client session ID matching to work and we know much 
1870          * earlier that the ticket has been accepted.
1871          * 
1872          * The other way is to set zero length session ID when the
1873          * ticket is presented and rely on the handshake to determine
1874          * session resumption.
1875          *
1876          * We choose the former approach because this fits in with
1877          * assumptions elsewhere in OpenSSL. The session ID is set
1878          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1879          * ticket.
1880          */ 
1881         EVP_Digest(p, ticklen,
1882                         s->session->session_id, &s->session->session_id_length,
1883 #ifndef OPENSSL_NO_SHA256
1884                                                         EVP_sha256(), NULL);
1885 #else
1886                                                         EVP_sha1(), NULL);
1887 #endif
1888         ret=1;
1889         return(ret);
1890 f_err:
1891         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1892 err:
1893         return(-1);
1894         }
1895
1896 int ssl3_get_cert_status(SSL *s)
1897         {
1898         int ok, al;
1899         unsigned long resplen,n;
1900         const unsigned char *p;
1901
1902         n=s->method->ssl_get_message(s,
1903                 SSL3_ST_CR_CERT_STATUS_A,
1904                 SSL3_ST_CR_CERT_STATUS_B,
1905                 SSL3_MT_CERTIFICATE_STATUS,
1906                 16384,
1907                 &ok);
1908
1909         if (!ok) return((int)n);
1910         if (n < 4)
1911                 {
1912                 /* need at least status type + length */
1913                 al = SSL_AD_DECODE_ERROR;
1914                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1915                 goto f_err;
1916                 }
1917         p = (unsigned char *)s->init_msg;
1918         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1919                 {
1920                 al = SSL_AD_DECODE_ERROR;
1921                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1922                 goto f_err;
1923                 }
1924         n2l3(p, resplen);
1925         if (resplen + 4 != n)
1926                 {
1927                 al = SSL_AD_DECODE_ERROR;
1928                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1929                 goto f_err;
1930                 }
1931         if (s->tlsext_ocsp_resp)
1932                 OPENSSL_free(s->tlsext_ocsp_resp);
1933         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1934         if (!s->tlsext_ocsp_resp)
1935                 {
1936                 al = SSL_AD_INTERNAL_ERROR;
1937                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1938                 goto f_err;
1939                 }
1940         s->tlsext_ocsp_resplen = resplen;
1941         if (s->ctx->tlsext_status_cb)
1942                 {
1943                 int ret;
1944                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1945                 if (ret == 0)
1946                         {
1947                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1948                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1949                         goto f_err;
1950                         }
1951                 if (ret < 0)
1952                         {
1953                         al = SSL_AD_INTERNAL_ERROR;
1954                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1955                         goto f_err;
1956                         }
1957                 }
1958         return 1;
1959 f_err:
1960         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1961         return(-1);
1962         }
1963 #endif
1964
1965 int ssl3_get_server_done(SSL *s)
1966         {
1967         int ok,ret=0;
1968         long n;
1969
1970         n=s->method->ssl_get_message(s,
1971                 SSL3_ST_CR_SRVR_DONE_A,
1972                 SSL3_ST_CR_SRVR_DONE_B,
1973                 SSL3_MT_SERVER_DONE,
1974                 30, /* should be very small, like 0 :-) */
1975                 &ok);
1976
1977         if (!ok) return((int)n);
1978         if (n > 0)
1979                 {
1980                 /* should contain no data */
1981                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1982                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1983                 return -1;
1984                 }
1985         ret=1;
1986         return(ret);
1987         }
1988
1989
1990 int ssl3_send_client_key_exchange(SSL *s)
1991         {
1992         unsigned char *p,*d;
1993         int n;
1994         unsigned long alg_k;
1995 #ifndef OPENSSL_NO_RSA
1996         unsigned char *q;
1997         EVP_PKEY *pkey=NULL;
1998 #endif
1999 #ifndef OPENSSL_NO_KRB5
2000         KSSL_ERR kssl_err;
2001 #endif /* OPENSSL_NO_KRB5 */
2002 #ifndef OPENSSL_NO_ECDH
2003         EC_KEY *clnt_ecdh = NULL;
2004         const EC_POINT *srvr_ecpoint = NULL;
2005         EVP_PKEY *srvr_pub_pkey = NULL;
2006         unsigned char *encodedPoint = NULL;
2007         int encoded_pt_len = 0;
2008         BN_CTX * bn_ctx = NULL;
2009 #endif
2010
2011         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2012                 {
2013                 d=(unsigned char *)s->init_buf->data;
2014                 p= &(d[4]);
2015
2016                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2017
2018                 /* Fool emacs indentation */
2019                 if (0) {}
2020 #ifndef OPENSSL_NO_RSA
2021                 else if (alg_k & SSL_kRSA)
2022                         {
2023                         RSA *rsa;
2024                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2025
2026                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2027                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2028                         else
2029                                 {
2030                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2031                                 if ((pkey == NULL) ||
2032                                         (pkey->type != EVP_PKEY_RSA) ||
2033                                         (pkey->pkey.rsa == NULL))
2034                                         {
2035                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2036                                         goto err;
2037                                         }
2038                                 rsa=pkey->pkey.rsa;
2039                                 EVP_PKEY_free(pkey);
2040                                 }
2041                                 
2042                         tmp_buf[0]=s->client_version>>8;
2043                         tmp_buf[1]=s->client_version&0xff;
2044                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2045                                         goto err;
2046
2047                         s->session->master_key_length=sizeof tmp_buf;
2048
2049                         q=p;
2050                         /* Fix buf for TLS and beyond */
2051                         if (s->version > SSL3_VERSION)
2052                                 p+=2;
2053                         n=RSA_public_encrypt(sizeof tmp_buf,
2054                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2055 #ifdef PKCS1_CHECK
2056                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2057                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2058 #endif
2059                         if (n <= 0)
2060                                 {
2061                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2062                                 goto err;
2063                                 }
2064
2065                         /* Fix buf for TLS and beyond */
2066                         if (s->version > SSL3_VERSION)
2067                                 {
2068                                 s2n(n,q);
2069                                 n+=2;
2070                                 }
2071
2072                         s->session->master_key_length=
2073                                 s->method->ssl3_enc->generate_master_secret(s,
2074                                         s->session->master_key,
2075                                         tmp_buf,sizeof tmp_buf);
2076                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2077                         }
2078 #endif
2079 #ifndef OPENSSL_NO_KRB5
2080                 else if (alg_k & SSL_kKRB5)
2081                         {
2082                         krb5_error_code krb5rc;
2083                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2084                         /*  krb5_data   krb5_ap_req;  */
2085                         krb5_data       *enc_ticket;
2086                         krb5_data       authenticator, *authp = NULL;
2087                         EVP_CIPHER_CTX  ciph_ctx;
2088                         const EVP_CIPHER *enc = NULL;
2089                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2090                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2091                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH 
2092                                                 + EVP_MAX_IV_LENGTH];
2093                         int             padl, outl = sizeof(epms);
2094
2095                         EVP_CIPHER_CTX_init(&ciph_ctx);
2096
2097 #ifdef KSSL_DEBUG
2098                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2099                                 alg_k, SSL_kKRB5);
2100 #endif  /* KSSL_DEBUG */
2101
2102                         authp = NULL;
2103 #ifdef KRB5SENDAUTH
2104                         if (KRB5SENDAUTH)  authp = &authenticator;
2105 #endif  /* KRB5SENDAUTH */
2106
2107                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2108                                 &kssl_err);
2109                         enc = kssl_map_enc(kssl_ctx->enctype);
2110                         if (enc == NULL)
2111                             goto err;
2112 #ifdef KSSL_DEBUG
2113                         {
2114                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2115                         if (krb5rc && kssl_err.text)
2116                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2117                         }
2118 #endif  /* KSSL_DEBUG */
2119
2120                         if (krb5rc)
2121                                 {
2122                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2123                                                 SSL_AD_HANDSHAKE_FAILURE);
2124                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2125                                                 kssl_err.reason);
2126                                 goto err;
2127                                 }
2128
2129                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2130                         **  in place of RFC 2712 KerberosWrapper, as in:
2131                         **
2132                         **  Send ticket (copy to *p, set n = length)
2133                         **  n = krb5_ap_req.length;
2134                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2135                         **  if (krb5_ap_req.data)  
2136                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2137                         **
2138                         **  Now using real RFC 2712 KerberosWrapper
2139                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2140                         **  Note: 2712 "opaque" types are here replaced
2141                         **  with a 2-byte length followed by the value.
2142                         **  Example:
2143                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2144                         **  Where "xx xx" = length bytes.  Shown here with
2145                         **  optional authenticator omitted.
2146                         */
2147
2148                         /*  KerberosWrapper.Ticket              */
2149                         s2n(enc_ticket->length,p);
2150                         memcpy(p, enc_ticket->data, enc_ticket->length);
2151                         p+= enc_ticket->length;
2152                         n = enc_ticket->length + 2;
2153
2154                         /*  KerberosWrapper.Authenticator       */
2155                         if (authp  &&  authp->length)  
2156                                 {
2157                                 s2n(authp->length,p);
2158                                 memcpy(p, authp->data, authp->length);
2159                                 p+= authp->length;
2160                                 n+= authp->length + 2;
2161                                 
2162                                 free(authp->data);
2163                                 authp->data = NULL;
2164                                 authp->length = 0;
2165                                 }
2166                         else
2167                                 {
2168                                 s2n(0,p);/*  null authenticator length  */
2169                                 n+=2;
2170                                 }
2171  
2172                             tmp_buf[0]=s->client_version>>8;
2173                             tmp_buf[1]=s->client_version&0xff;
2174                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2175                                 goto err;
2176
2177                         /*  20010420 VRS.  Tried it this way; failed.
2178                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2179                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2180                         **                              kssl_ctx->length);
2181                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2182                         */
2183
2184                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2185                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2186                                 kssl_ctx->key,iv);
2187                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2188                                 sizeof tmp_buf);
2189                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2190                         outl += padl;
2191                         if (outl > (int)sizeof epms)
2192                                 {
2193                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2194                                 goto err;
2195                                 }
2196                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2197
2198                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2199                         s2n(outl,p);
2200                         memcpy(p, epms, outl);
2201                         p+=outl;
2202                         n+=outl + 2;
2203
2204                         s->session->master_key_length=
2205                                 s->method->ssl3_enc->generate_master_secret(s,
2206                                         s->session->master_key,
2207                                         tmp_buf, sizeof tmp_buf);
2208
2209                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2210                         OPENSSL_cleanse(epms, outl);
2211                         }
2212 #endif
2213 #ifndef OPENSSL_NO_DH
2214                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2215                         {
2216                         DH *dh_srvr,*dh_clnt;
2217
2218                         if (s->session->sess_cert == NULL) 
2219                                 {
2220                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2221                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2222                                 goto err;
2223                                 }
2224
2225                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2226                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2227                         else
2228                                 {
2229                                 /* we get them from the cert */
2230                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2231                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2232                                 goto err;
2233                                 }
2234                         
2235                         /* generate a new random key */
2236                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2237                                 {
2238                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2239                                 goto err;
2240                                 }
2241                         if (!DH_generate_key(dh_clnt))
2242                                 {
2243                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2244                                 goto err;
2245                                 }
2246
2247                         /* use the 'p' output buffer for the DH key, but
2248                          * make sure to clear it out afterwards */
2249
2250                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2251
2252                         if (n <= 0)
2253                                 {
2254                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2255                                 goto err;
2256                                 }
2257
2258                         /* generate master key from the result */
2259                         s->session->master_key_length=
2260                                 s->method->ssl3_enc->generate_master_secret(s,
2261                                         s->session->master_key,p,n);
2262                         /* clean up */
2263                         memset(p,0,n);
2264
2265                         /* send off the data */
2266                         n=BN_num_bytes(dh_clnt->pub_key);
2267                         s2n(n,p);
2268                         BN_bn2bin(dh_clnt->pub_key,p);
2269                         n+=2;
2270
2271                         DH_free(dh_clnt);
2272
2273                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2274                         }
2275 #endif
2276
2277 #ifndef OPENSSL_NO_ECDH 
2278                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2279                         {
2280                         const EC_GROUP *srvr_group = NULL;
2281                         EC_KEY *tkey;
2282                         int ecdh_clnt_cert = 0;
2283                         int field_size = 0;
2284
2285                         /* Did we send out the client's
2286                          * ECDH share for use in premaster
2287                          * computation as part of client certificate?
2288                          * If so, set ecdh_clnt_cert to 1.
2289                          */
2290                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 
2291                                 {
2292                                 /* XXX: For now, we do not support client
2293                                  * authentication using ECDH certificates.
2294                                  * To add such support, one needs to add
2295                                  * code that checks for appropriate 
2296                                  * conditions and sets ecdh_clnt_cert to 1.
2297                                  * For example, the cert have an ECC
2298                                  * key on the same curve as the server's
2299                                  * and the key should be authorized for
2300                                  * key agreement.
2301                                  *
2302                                  * One also needs to add code in ssl3_connect
2303                                  * to skip sending the certificate verify
2304                                  * message.
2305                                  *
2306                                  * if ((s->cert->key->privatekey != NULL) &&
2307                                  *     (s->cert->key->privatekey->type ==
2308                                  *      EVP_PKEY_EC) && ...)
2309                                  * ecdh_clnt_cert = 1;
2310                                  */
2311                                 }
2312
2313                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2314                                 {
2315                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2316                                 }
2317                         else
2318                                 {
2319                                 /* Get the Server Public Key from Cert */
2320                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2321                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2322                                 if ((srvr_pub_pkey == NULL) ||
2323                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2324                                     (srvr_pub_pkey->pkey.ec == NULL))
2325                                         {
2326                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2327                                             ERR_R_INTERNAL_ERROR);
2328                                         goto err;
2329                                         }
2330
2331                                 tkey = srvr_pub_pkey->pkey.ec;
2332                                 }
2333
2334                         srvr_group   = EC_KEY_get0_group(tkey);
2335                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2336
2337                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2338                                 {
2339                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2340                                     ERR_R_INTERNAL_ERROR);
2341                                 goto err;
2342                                 }
2343
2344                         if ((clnt_ecdh=EC_KEY_new()) == NULL) 
2345                                 {
2346                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2347                                 goto err;
2348                                 }
2349
2350                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2351                                 {
2352                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2353                                 goto err;
2354                                 }
2355                         if (ecdh_clnt_cert) 
2356                                 { 
2357                                 /* Reuse key info from our certificate
2358                                  * We only need our private key to perform
2359                                  * the ECDH computation.
2360                                  */
2361                                 const BIGNUM *priv_key;
2362                                 tkey = s->cert->key->privatekey->pkey.ec;
2363                                 priv_key = EC_KEY_get0_private_key(tkey);
2364                                 if (priv_key == NULL)
2365                                         {
2366                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2367                                         goto err;
2368                                         }
2369                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2370                                         {
2371                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2372                                         goto err;
2373                                         }
2374                                 }
2375                         else 
2376                                 {
2377                                 /* Generate a new ECDH key pair */
2378                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2379                                         {
2380                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2381                                         goto err;
2382                                         }
2383                                 }
2384
2385                         /* use the 'p' output buffer for the ECDH key, but
2386                          * make sure to clear it out afterwards
2387                          */
2388
2389                         field_size = EC_GROUP_get_degree(srvr_group);
2390                         if (field_size <= 0)
2391                                 {
2392                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2393                                        ERR_R_ECDH_LIB);
2394                                 goto err;
2395                                 }
2396                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2397                         if (n <= 0)
2398                                 {
2399                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2400                                        ERR_R_ECDH_LIB);
2401                                 goto err;
2402                                 }
2403
2404                         /* generate master key from the result */
2405                         s->session->master_key_length = s->method->ssl3_enc \
2406                             -> generate_master_secret(s, 
2407                                 s->session->master_key,
2408                                 p, n);
2409
2410                         memset(p, 0, n); /* clean up */
2411
2412                         if (ecdh_clnt_cert) 
2413                                 {
2414                                 /* Send empty client key exch message */
2415                                 n = 0;
2416                                 }
2417                         else 
2418                                 {
2419                                 /* First check the size of encoding and
2420                                  * allocate memory accordingly.
2421                                  */
2422                                 encoded_pt_len = 
2423                                     EC_POINT_point2oct(srvr_group, 
2424                                         EC_KEY_get0_public_key(clnt_ecdh), 
2425                                         POINT_CONVERSION_UNCOMPRESSED, 
2426                                         NULL, 0, NULL);
2427
2428                                 encodedPoint = (unsigned char *) 
2429                                     OPENSSL_malloc(encoded_pt_len * 
2430                                         sizeof(unsigned char)); 
2431                                 bn_ctx = BN_CTX_new();
2432                                 if ((encodedPoint == NULL) || 
2433                                     (bn_ctx == NULL)) 
2434                                         {
2435                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2436                                         goto err;
2437                                         }
2438
2439                                 /* Encode the public key */
2440                                 n = EC_POINT_point2oct(srvr_group, 
2441                                     EC_KEY_get0_public_key(clnt_ecdh), 
2442                                     POINT_CONVERSION_UNCOMPRESSED, 
2443                                     encodedPoint, encoded_pt_len, bn_ctx);
2444
2445                                 *p = n; /* length of encoded point */
2446                                 /* Encoded point will be copied here */
2447                                 p += 1; 
2448                                 /* copy the point */
2449                                 memcpy((unsigned char *)p, encodedPoint, n);
2450                                 /* increment n to account for length field */
2451                                 n += 1; 
2452                                 }
2453
2454                         /* Free allocated memory */
2455                         BN_CTX_free(bn_ctx);
2456                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2457                         if (clnt_ecdh != NULL) 
2458                                  EC_KEY_free(clnt_ecdh);
2459                         EVP_PKEY_free(srvr_pub_pkey);
2460                         }
2461 #endif /* !OPENSSL_NO_ECDH */
2462                 else if (alg_k & SSL_kGOST) 
2463                         {
2464                         /* GOST key exchange message creation */
2465                         EVP_PKEY_CTX *pkey_ctx;
2466                         X509 *peer_cert; 
2467                         size_t msglen;
2468                         unsigned int md_len;
2469                         int keytype;
2470                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2471                         EVP_MD_CTX *ukm_hash;
2472                         EVP_PKEY *pub_key;
2473
2474                         /* Get server sertificate PKEY and create ctx from it */
2475                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2476                         if (!peer_cert) 
2477                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2478                         if (!peer_cert)         {
2479                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2480                                         goto err;
2481                                 }       
2482                                 
2483                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2484                         /* If we have send a certificate, and certificate key
2485
2486                          * parameters match those of server certificate, use
2487                          * certificate key for key exchange
2488                          */
2489
2490                          /* Otherwise, generate ephemeral key pair */
2491                                         
2492                         EVP_PKEY_encrypt_init(pkey_ctx);
2493                           /* Generate session key */    
2494                     RAND_bytes(premaster_secret,32);
2495                         /* If we have client certificate, use its secret as peer key */
2496                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2497                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2498                                         /* If there was an error - just ignore it. Ephemeral key
2499                                         * would be used
2500                                         */
2501                                         ERR_clear_error();
2502                                 }
2503                         }                       
2504                         /* Compute shared IV and store it in algorithm-specific
2505                          * context data */
2506                         ukm_hash = EVP_MD_CTX_create();
2507                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2508                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2509                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2510                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2511                         EVP_MD_CTX_destroy(ukm_hash);
2512                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2513                                 8,shared_ukm)<0) {
2514                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2515                                                 SSL_R_LIBRARY_BUG);
2516                                         goto err;
2517                                 }       
2518                         /* Make GOST keytransport blob message */
2519                         /*Encapsulate it into sequence */
2520                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2521                         msglen=255;
2522                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2523                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2524                                         SSL_R_LIBRARY_BUG);
2525                                 goto err;
2526                         }
2527                         if (msglen >= 0x80)
2528                                 {
2529                                 *(p++)=0x81;
2530                                 *(p++)= msglen & 0xff;
2531                                 n=msglen+3;
2532                                 }
2533                         else
2534                                 {
2535                                 *(p++)= msglen & 0xff;
2536                                 n=msglen+2;
2537                                 }
2538                         memcpy(p, tmp, msglen);
2539                         /* Check if pubkey from client certificate was used */
2540                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2541                                 {
2542                                 /* Set flag "skip certificate verify" */
2543                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2544                                 }
2545                         EVP_PKEY_CTX_free(pkey_ctx);
2546                         s->session->master_key_length=
2547                                 s->method->ssl3_enc->generate_master_secret(s,
2548                                         s->session->master_key,premaster_secret,32);
2549                         EVP_PKEY_free(pub_key);
2550
2551                         }
2552 #ifndef OPENSSL_NO_PSK
2553                 else if (alg_k & SSL_kPSK)
2554                         {
2555                         char identity[PSK_MAX_IDENTITY_LEN];
2556                         unsigned char *t = NULL;
2557                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2558                         unsigned int pre_ms_len = 0, psk_len = 0;
2559                         int psk_err = 1;
2560
2561                         n = 0;
2562                         if (s->psk_client_callback == NULL)
2563                                 {
2564                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2565                                         SSL_R_PSK_NO_CLIENT_CB);
2566                                 goto err;
2567                                 }
2568
2569                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2570                                 identity, PSK_MAX_IDENTITY_LEN,
2571                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2572                         if (psk_len > PSK_MAX_PSK_LEN)
2573                                 {
2574                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2575                                         ERR_R_INTERNAL_ERROR);
2576                                 goto psk_err;
2577                                 }
2578                         else if (psk_len == 0)
2579                                 {
2580                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2581                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2582                                 goto psk_err;
2583                                 }
2584
2585                         /* create PSK pre_master_secret */
2586                         pre_ms_len = 2+psk_len+2+psk_len;
2587                         t = psk_or_pre_ms;
2588                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2589                         s2n(psk_len, t);
2590                         memset(t, 0, psk_len);
2591                         t+=psk_len;
2592                         s2n(psk_len, t);
2593
2594                         if (s->session->psk_identity_hint != NULL)
2595                                 OPENSSL_free(s->session->psk_identity_hint);
2596                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2597                         if (s->ctx->psk_identity_hint != NULL &&
2598                                 s->session->psk_identity_hint == NULL)
2599                                 {
2600                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2601                                         ERR_R_MALLOC_FAILURE);
2602                                 goto psk_err;
2603                                 }
2604
2605                         if (s->session->psk_identity != NULL)
2606                                 OPENSSL_free(s->session->psk_identity);
2607                         s->session->psk_identity = BUF_strdup(identity);
2608                         if (s->session->psk_identity == NULL)
2609                                 {
2610                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2611                                         ERR_R_MALLOC_FAILURE);
2612                                 goto psk_err;
2613                                 }
2614
2615                         s->session->master_key_length =
2616                                 s->method->ssl3_enc->generate_master_secret(s,
2617                                         s->session->master_key,
2618                                         psk_or_pre_ms, pre_ms_len); 
2619                         n = strlen(identity);
2620                         s2n(n, p);
2621                         memcpy(p, identity, n);
2622                         n+=2;
2623                         psk_err = 0;
2624                 psk_err:
2625                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2626                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2627                         if (psk_err != 0)
2628                                 {
2629                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2630                                 goto err;
2631                                 }
2632                         }
2633 #endif
2634                 else
2635                         {
2636                         ssl3_send_alert(s, SSL3_AL_FATAL,
2637                             SSL_AD_HANDSHAKE_FAILURE);
2638                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2639                             ERR_R_INTERNAL_ERROR);
2640                         goto err;
2641                         }
2642                 
2643                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2644                 l2n3(n,d);
2645
2646                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2647                 /* number of bytes to write */
2648                 s->init_num=n+4;
2649                 s->init_off=0;
2650                 }
2651
2652         /* SSL3_ST_CW_KEY_EXCH_B */
2653         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2654 err:
2655 #ifndef OPENSSL_NO_ECDH
2656         BN_CTX_free(bn_ctx);
2657         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2658         if (clnt_ecdh != NULL) 
2659                 EC_KEY_free(clnt_ecdh);
2660         EVP_PKEY_free(srvr_pub_pkey);
2661 #endif
2662         return(-1);
2663         }
2664
2665 int ssl3_send_client_verify(SSL *s)
2666         {
2667         unsigned char *p,*d;
2668         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2669         EVP_PKEY *pkey;
2670         EVP_PKEY_CTX *pctx=NULL;
2671 #ifndef OPENSSL_NO_RSA
2672         unsigned u=0;
2673 #endif
2674         unsigned long n;
2675 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2676         int j;
2677 #endif
2678
2679         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2680                 {
2681                 d=(unsigned char *)s->init_buf->data;
2682                 p= &(d[4]);
2683                 pkey=s->cert->key->privatekey;
2684 /* Create context from key and test if sha1 is allowed as digest */
2685                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2686                 EVP_PKEY_sign_init(pctx);
2687                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2688                         {
2689                         s->method->ssl3_enc->cert_verify_mac(s,
2690                                                 NID_sha1,
2691                                                 &(data[MD5_DIGEST_LENGTH]));
2692                         }
2693                 else
2694                         {
2695                         ERR_clear_error();
2696                         }
2697 #ifndef OPENSSL_NO_RSA
2698                 if (pkey->type == EVP_PKEY_RSA)
2699                         {
2700                         s->method->ssl3_enc->cert_verify_mac(s,
2701                                 NID_md5,
2702                                 &(data[0]));
2703                         if (RSA_sign(NID_md5_sha1, data,
2704                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2705                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2706                                 {
2707                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2708                                 goto err;
2709                                 }
2710                         s2n(u,p);
2711                         n=u+2;
2712                         }
2713                 else
2714 #endif
2715 #ifndef OPENSSL_NO_DSA
2716                         if (pkey->type == EVP_PKEY_DSA)
2717                         {
2718                         if (!DSA_sign(pkey->save_type,
2719                                 &(data[MD5_DIGEST_LENGTH]),
2720                                 SHA_DIGEST_LENGTH,&(p[2]),
2721                                 (unsigned int *)&j,pkey->pkey.dsa))
2722                                 {
2723                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2724                                 goto err;
2725                                 }
2726                         s2n(j,p);
2727                         n=j+2;
2728                         }
2729                 else
2730 #endif
2731 #ifndef OPENSSL_NO_ECDSA
2732                         if (pkey->type == EVP_PKEY_EC)
2733                         {
2734                         if (!ECDSA_sign(pkey->save_type,
2735                                 &(data[MD5_DIGEST_LENGTH]),
2736                                 SHA_DIGEST_LENGTH,&(p[2]),
2737                                 (unsigned int *)&j,pkey->pkey.ec))
2738                                 {
2739                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2740                                     ERR_R_ECDSA_LIB);
2741                                 goto err;
2742                                 }
2743                         s2n(j,p);
2744                         n=j+2;
2745                         }
2746                 else
2747 #endif
2748                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 
2749                 {
2750                 unsigned char signbuf[64];
2751                 int i;
2752                 size_t sigsize=64;
2753                 s->method->ssl3_enc->cert_verify_mac(s,
2754                         NID_id_GostR3411_94,
2755                         data);
2756                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
2757                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2758                         ERR_R_INTERNAL_ERROR);
2759                         goto err;
2760                 }
2761                 for (i=63,j=0; i>=0; j++, i--) {
2762                         p[2+j]=signbuf[i];
2763                 }       
2764                 s2n(j,p);
2765                 n=j+2;
2766                 }
2767                 else
2768                 {
2769                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2770                         goto err;
2771                 }
2772                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2773                 l2n3(n,d);
2774
2775                 s->state=SSL3_ST_CW_CERT_VRFY_B;
2776                 s->init_num=(int)n+4;
2777                 s->init_off=0;
2778                 }
2779         EVP_PKEY_CTX_free(pctx);
2780         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2781 err:
2782         EVP_PKEY_CTX_free(pctx);
2783         return(-1);
2784         }
2785
2786 int ssl3_send_client_certificate(SSL *s)
2787         {
2788         X509 *x509=NULL;
2789         EVP_PKEY *pkey=NULL;
2790         int i;
2791         unsigned long l;
2792
2793         if (s->state == SSL3_ST_CW_CERT_A)
2794                 {
2795                 if ((s->cert == NULL) ||
2796                         (s->cert->key->x509 == NULL) ||
2797                         (s->cert->key->privatekey == NULL))
2798                         s->state=SSL3_ST_CW_CERT_B;
2799                 else
2800                         s->state=SSL3_ST_CW_CERT_C;
2801                 }
2802
2803         /* We need to get a client cert */
2804         if (s->state == SSL3_ST_CW_CERT_B)
2805                 {
2806                 /* If we get an error, we need to
2807                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2808                  * We then get retied later */
2809                 i=0;
2810                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2811                 if (i < 0)
2812                         {
2813                         s->rwstate=SSL_X509_LOOKUP;
2814                         return(-1);
2815                         }
2816                 s->rwstate=SSL_NOTHING;
2817                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2818                         {
2819                         s->state=SSL3_ST_CW_CERT_B;
2820                         if (    !SSL_use_certificate(s,x509) ||
2821                                 !SSL_use_PrivateKey(s,pkey))
2822                                 i=0;
2823                         }
2824                 else if (i == 1)
2825                         {
2826                         i=0;
2827                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2828                         }
2829
2830                 if (x509 != NULL) X509_free(x509);
2831                 if (pkey != NULL) EVP_PKEY_free(pkey);
2832                 if (i == 0)
2833                         {
2834                         if (s->version == SSL3_VERSION)
2835                                 {
2836                                 s->s3->tmp.cert_req=0;
2837                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2838                                 return(1);
2839                                 }
2840                         else
2841                                 {
2842                                 s->s3->tmp.cert_req=2;
2843                                 }
2844                         }
2845
2846                 /* Ok, we have a cert */
2847                 s->state=SSL3_ST_CW_CERT_C;
2848                 }
2849
2850         if (s->state == SSL3_ST_CW_CERT_C)
2851                 {
2852                 s->state=SSL3_ST_CW_CERT_D;
2853                 l=ssl3_output_cert_chain(s,
2854                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2855                 s->init_num=(int)l;
2856                 s->init_off=0;
2857                 }
2858         /* SSL3_ST_CW_CERT_D */
2859         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2860         }
2861
2862 #define has_bits(i,m)   (((i)&(m)) == (m))
2863
2864 int ssl3_check_cert_and_algorithm(SSL *s)
2865         {
2866         int i,idx;
2867         long alg_k,alg_a;
2868         EVP_PKEY *pkey=NULL;
2869         SESS_CERT *sc;
2870 #ifndef OPENSSL_NO_RSA
2871         RSA *rsa;
2872 #endif
2873 #ifndef OPENSSL_NO_DH
2874         DH *dh;
2875 #endif
2876
2877         sc=s->session->sess_cert;
2878         if (sc == NULL)
2879                 {
2880                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2881                 goto err;
2882                 }
2883
2884         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2885         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2886
2887         /* we don't have a certificate */
2888         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2889                 return(1);
2890
2891 #ifndef OPENSSL_NO_RSA
2892         rsa=s->session->sess_cert->peer_rsa_tmp;
2893 #endif
2894 #ifndef OPENSSL_NO_DH
2895         dh=s->session->sess_cert->peer_dh_tmp;
2896 #endif
2897
2898         /* This is the passed certificate */
2899
2900         idx=sc->peer_cert_type;
2901 #ifndef OPENSSL_NO_ECDH
2902         if (idx == SSL_PKEY_ECC)
2903                 {
2904                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2905                     s->s3->tmp.new_cipher) == 0) 
2906                         { /* check failed */
2907                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2908                         goto f_err;
2909                         }
2910                 else 
2911                         {
2912                         return 1;
2913                         }
2914                 }
2915 #endif
2916         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2917         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2918         EVP_PKEY_free(pkey);
2919
2920         
2921         /* Check that we have a certificate if we require one */
2922         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2923                 {
2924                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2925                 goto f_err;
2926                 }
2927 #ifndef OPENSSL_NO_DSA
2928         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2929                 {
2930                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2931                 goto f_err;
2932                 }
2933 #endif
2934 #ifndef OPENSSL_NO_RSA
2935         if ((alg_k & SSL_kRSA) &&
2936                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2937                 {
2938                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2939                 goto f_err;
2940                 }
2941 #endif
2942 #ifndef OPENSSL_NO_DH
2943         if ((alg_k & SSL_kEDH) &&
2944                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2945                 {
2946                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2947                 goto f_err;
2948                 }
2949         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2950                 {
2951                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2952                 goto f_err;
2953                 }
2954 #ifndef OPENSSL_NO_DSA
2955         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2956                 {
2957                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2958                 goto f_err;
2959                 }
2960 #endif
2961 #endif
2962
2963         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2964                 {
2965 #ifndef OPENSSL_NO_RSA
2966                 if (alg_k & SSL_kRSA)
2967                         {
2968                         if (rsa == NULL
2969                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2970                                 {
2971                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2972                                 goto f_err;
2973                                 }
2974                         }
2975                 else
2976 #endif
2977 #ifndef OPENSSL_NO_DH
2978                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2979                             {
2980                             if (dh == NULL
2981                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2982                                 {
2983                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2984                                 goto f_err;
2985                                 }
2986                         }
2987                 else
2988 #endif
2989                         {
2990                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2991                         goto f_err;
2992                         }
2993                 }
2994         return(1);
2995 f_err:
2996         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2997 err:
2998         return(0);
2999         }
3000
3001 /* Check to see if handshake is full or resumed. Usually this is just a
3002  * case of checking to see if a cache hit has occurred. In the case of
3003  * session tickets we have to check the next message to be sure.
3004  */
3005
3006 #ifndef OPENSSL_NO_TLSEXT
3007 int ssl3_check_finished(SSL *s)
3008         {
3009         int ok;
3010         long n;
3011         /* If we have no ticket it cannot be a resumed session. */
3012         if (!s->session->tlsext_tick)
3013                 return 1;
3014         /* this function is called when we really expect a Certificate
3015          * message, so permit appropriate message length */
3016         n=s->method->ssl_get_message(s,
3017                 SSL3_ST_CR_CERT_A,
3018                 SSL3_ST_CR_CERT_B,
3019                 -1,
3020                 s->max_cert_list,
3021                 &ok);
3022         if (!ok) return((int)n);
3023         s->s3->tmp.reuse_message = 1;
3024         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3025                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3026                 return 2;
3027
3028         return 1;
3029         }
3030 #endif
3031
3032 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3033         {
3034         int i = 0;
3035 #ifndef OPENSSL_NO_ENGINE
3036         if (s->ctx->client_cert_engine)
3037                 {
3038                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3039                                                 SSL_get_client_CA_list(s),
3040                                                 px509, ppkey, NULL, NULL, NULL);
3041                 if (i != 0)
3042                         return i;
3043                 }
3044 #endif
3045         if (s->ctx->client_cert_cb)
3046                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3047         return i;
3048         }