Remove versions test from dtls1_buffer_message
[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 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174         {
175         if (ver == SSL3_VERSION)
176                 return(SSLv3_client_method());
177         else
178                 return(NULL);
179         }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182                         ssl_undefined_function,
183                         ssl3_connect,
184                         ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187         {
188         BUF_MEM *buf=NULL;
189         unsigned long Time=(unsigned long)time(NULL);
190         void (*cb)(const SSL *ssl,int type,int val)=NULL;
191         int ret= -1;
192         int new_state,state,skip=0;
193
194         RAND_add(&Time,sizeof(Time),0);
195         ERR_clear_error();
196         clear_sys_error();
197
198         if (s->info_callback != NULL)
199                 cb=s->info_callback;
200         else if (s->ctx->info_callback != NULL)
201                 cb=s->ctx->info_callback;
202         
203         s->in_handshake++;
204         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207         /* If we're awaiting a HeartbeatResponse, pretend we
208          * already got and don't await it anymore, because
209          * Heartbeats don't make sense during handshakes anyway.
210          */
211         if (s->tlsext_hb_pending)
212                 {
213                 s->tlsext_hb_pending = 0;
214                 s->tlsext_hb_seq++;
215                 }
216 #endif
217
218         for (;;)
219                 {
220                 state=s->state;
221
222                 switch(s->state)
223                         {
224                 case SSL_ST_RENEGOTIATE:
225                         s->renegotiate=1;
226                         s->state=SSL_ST_CONNECT;
227                         s->ctx->stats.sess_connect_renegotiate++;
228                         /* break */
229                 case SSL_ST_BEFORE:
230                 case SSL_ST_CONNECT:
231                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232                 case SSL_ST_OK|SSL_ST_CONNECT:
233
234                         s->server=0;
235                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237                         if ((s->version & 0xff00 ) != 0x0300)
238                                 {
239                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240                                 ret = -1;
241                                 goto end;
242                                 }
243                                 
244                         /* s->version=SSL3_VERSION; */
245                         s->type=SSL_ST_CONNECT;
246
247                         if (s->init_buf == NULL)
248                                 {
249                                 if ((buf=BUF_MEM_new()) == NULL)
250                                         {
251                                         ret= -1;
252                                         goto end;
253                                         }
254                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255                                         {
256                                         ret= -1;
257                                         goto end;
258                                         }
259                                 s->init_buf=buf;
260                                 buf=NULL;
261                                 }
262
263                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265                         /* setup buffing BIO */
266                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268                         /* don't push the buffering BIO quite yet */
269
270                         ssl3_init_finished_mac(s);
271
272                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
273                         s->ctx->stats.sess_connect++;
274                         s->init_num=0;
275                         break;
276
277                 case SSL3_ST_CW_CLNT_HELLO_A:
278                 case SSL3_ST_CW_CLNT_HELLO_B:
279
280                         s->shutdown=0;
281                         ret=ssl3_client_hello(s);
282                         if (ret <= 0) goto end;
283                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
284                         s->init_num=0;
285
286                         /* turn on buffering for the next lot of output */
287                         if (s->bbio != s->wbio)
288                                 s->wbio=BIO_push(s->bbio,s->wbio);
289
290                         break;
291
292                 case SSL3_ST_CR_SRVR_HELLO_A:
293                 case SSL3_ST_CR_SRVR_HELLO_B:
294                         ret=ssl3_get_server_hello(s);
295                         if (ret <= 0) goto end;
296
297                         if (s->hit)
298                                 {
299                                 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301                                 if (s->tlsext_ticket_expected)
302                                         {
303                                         /* receive renewed session ticket */
304                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
305                                         }
306 #endif
307                                 }
308                         else
309                                 {
310 #ifndef OPENSSL_NO_TLSEXT
311                                 /* The server hello indicated that
312                                  * an audit proof would follow. */
313                                 if (s->s3->tlsext_authz_server_promised)
314                                         s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
315                                 else
316 #endif
317                                         s->state=SSL3_ST_CR_CERT_A;
318                                 }
319                         s->init_num=0;
320                         break;
321 #ifndef OPENSSL_NO_TLSEXT
322                 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
323                 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
324                         ret = tls1_get_server_supplemental_data(s);
325                         if (ret <= 0) goto end;
326                         s->state=SSL3_ST_CR_CERT_A;
327                         s->init_num = 0;
328                         break;
329 #endif
330                 case SSL3_ST_CR_CERT_A:
331                 case SSL3_ST_CR_CERT_B:
332 #ifndef OPENSSL_NO_TLSEXT
333                         ret=ssl3_check_finished(s);
334                         if (ret <= 0) goto end;
335                         if (ret == 2)
336                                 {
337                                 s->hit = 1;
338                                 if (s->tlsext_ticket_expected)
339                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
340                                 else
341                                         s->state=SSL3_ST_CR_FINISHED_A;
342                                 s->init_num=0;
343                                 break;
344                                 }
345 #endif
346                         /* Check if it is anon DH/ECDH */
347                         /* or PSK */
348                         if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
349                             !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
350                                 {
351                                 ret=ssl3_get_server_certificate(s);
352                                 if (ret <= 0) goto end;
353 #ifndef OPENSSL_NO_TLSEXT
354                                 if (s->tlsext_status_expected)
355                                         s->state=SSL3_ST_CR_CERT_STATUS_A;
356                                 else
357                                         s->state=SSL3_ST_CR_KEY_EXCH_A;
358                                 }
359                         else
360                                 {
361                                 skip = 1;
362                                 s->state=SSL3_ST_CR_KEY_EXCH_A;
363                                 }
364 #else
365                                 }
366                         else
367                                 skip=1;
368
369                         s->state=SSL3_ST_CR_KEY_EXCH_A;
370 #endif
371                         s->init_num=0;
372                         break;
373
374                 case SSL3_ST_CR_KEY_EXCH_A:
375                 case SSL3_ST_CR_KEY_EXCH_B:
376                         ret=ssl3_get_key_exchange(s);
377                         if (ret <= 0) goto end;
378                         s->state=SSL3_ST_CR_CERT_REQ_A;
379                         s->init_num=0;
380
381                         /* at this point we check that we have the
382                          * required stuff from the server */
383                         if (!ssl3_check_cert_and_algorithm(s))
384                                 {
385                                 ret= -1;
386                                 goto end;
387                                 }
388                         break;
389
390                 case SSL3_ST_CR_CERT_REQ_A:
391                 case SSL3_ST_CR_CERT_REQ_B:
392                         ret=ssl3_get_certificate_request(s);
393                         if (ret <= 0) goto end;
394                         s->state=SSL3_ST_CR_SRVR_DONE_A;
395                         s->init_num=0;
396                         break;
397
398                 case SSL3_ST_CR_SRVR_DONE_A:
399                 case SSL3_ST_CR_SRVR_DONE_B:
400                         ret=ssl3_get_server_done(s);
401                         if (ret <= 0) goto end;
402 #ifndef OPENSSL_NO_SRP
403                         if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
404                                 {
405                                 if ((ret = SRP_Calc_A_param(s))<=0)
406                                         {
407                                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
408                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
409                                         goto end;
410                                         }
411                                 }
412 #endif
413                         if (s->s3->tmp.cert_req)
414                                 s->state=SSL3_ST_CW_CERT_A;
415                         else
416                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
417                         s->init_num=0;
418
419                         break;
420
421                 case SSL3_ST_CW_CERT_A:
422                 case SSL3_ST_CW_CERT_B:
423                 case SSL3_ST_CW_CERT_C:
424                 case SSL3_ST_CW_CERT_D:
425                         ret=ssl3_send_client_certificate(s);
426                         if (ret <= 0) goto end;
427                         s->state=SSL3_ST_CW_KEY_EXCH_A;
428                         s->init_num=0;
429                         break;
430
431                 case SSL3_ST_CW_KEY_EXCH_A:
432                 case SSL3_ST_CW_KEY_EXCH_B:
433                         ret=ssl3_send_client_key_exchange(s);
434                         if (ret <= 0) goto end;
435                         /* EAY EAY EAY need to check for DH fix cert
436                          * sent back */
437                         /* For TLS, cert_req is set to 2, so a cert chain
438                          * of nothing is sent, but no verify packet is sent */
439                         /* XXX: For now, we do not support client 
440                          * authentication in ECDH cipher suites with
441                          * ECDH (rather than ECDSA) certificates.
442                          * We need to skip the certificate verify 
443                          * message when client's ECDH public key is sent 
444                          * inside the client certificate.
445                          */
446                         if (s->s3->tmp.cert_req == 1)
447                                 {
448                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
449                                 }
450                         else
451                                 {
452                                 s->state=SSL3_ST_CW_CHANGE_A;
453                                 s->s3->change_cipher_spec=0;
454                                 }
455                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
456                                 {
457                                 s->state=SSL3_ST_CW_CHANGE_A;
458                                 s->s3->change_cipher_spec=0;
459                                 }
460
461                         s->init_num=0;
462                         break;
463
464                 case SSL3_ST_CW_CERT_VRFY_A:
465                 case SSL3_ST_CW_CERT_VRFY_B:
466                         ret=ssl3_send_client_verify(s);
467                         if (ret <= 0) goto end;
468                         s->state=SSL3_ST_CW_CHANGE_A;
469                         s->init_num=0;
470                         s->s3->change_cipher_spec=0;
471                         break;
472
473                 case SSL3_ST_CW_CHANGE_A:
474                 case SSL3_ST_CW_CHANGE_B:
475                         ret=ssl3_send_change_cipher_spec(s,
476                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
477                         if (ret <= 0) goto end;
478
479 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
480                         s->state=SSL3_ST_CW_FINISHED_A;
481 #else
482                         if (s->s3->next_proto_neg_seen)
483                                 s->state=SSL3_ST_CW_NEXT_PROTO_A;
484                         else
485                                 s->state=SSL3_ST_CW_FINISHED_A;
486 #endif
487                         s->init_num=0;
488
489                         s->session->cipher=s->s3->tmp.new_cipher;
490 #ifdef OPENSSL_NO_COMP
491                         s->session->compress_meth=0;
492 #else
493                         if (s->s3->tmp.new_compression == NULL)
494                                 s->session->compress_meth=0;
495                         else
496                                 s->session->compress_meth=
497                                         s->s3->tmp.new_compression->id;
498 #endif
499                         if (!s->method->ssl3_enc->setup_key_block(s))
500                                 {
501                                 ret= -1;
502                                 goto end;
503                                 }
504
505                         if (!s->method->ssl3_enc->change_cipher_state(s,
506                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
507                                 {
508                                 ret= -1;
509                                 goto end;
510                                 }
511
512                         break;
513
514 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
515                 case SSL3_ST_CW_NEXT_PROTO_A:
516                 case SSL3_ST_CW_NEXT_PROTO_B:
517                         ret=ssl3_send_next_proto(s);
518                         if (ret <= 0) goto end;
519                         s->state=SSL3_ST_CW_FINISHED_A;
520                         break;
521 #endif
522
523                 case SSL3_ST_CW_FINISHED_A:
524                 case SSL3_ST_CW_FINISHED_B:
525                         ret=ssl3_send_finished(s,
526                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
527                                 s->method->ssl3_enc->client_finished_label,
528                                 s->method->ssl3_enc->client_finished_label_len);
529                         if (ret <= 0) goto end;
530                         s->state=SSL3_ST_CW_FLUSH;
531
532                         /* clear flags */
533                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
534                         if (s->hit)
535                                 {
536                                 s->s3->tmp.next_state=SSL_ST_OK;
537                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
538                                         {
539                                         s->state=SSL_ST_OK;
540                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
541                                         s->s3->delay_buf_pop_ret=0;
542                                         }
543                                 }
544                         else
545                                 {
546 #ifndef OPENSSL_NO_TLSEXT
547                                 /* Allow NewSessionTicket if ticket expected */
548                                 if (s->tlsext_ticket_expected)
549                                         s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
550                                 else
551 #endif
552                                 
553                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
554                                 }
555                         s->init_num=0;
556                         break;
557
558 #ifndef OPENSSL_NO_TLSEXT
559                 case SSL3_ST_CR_SESSION_TICKET_A:
560                 case SSL3_ST_CR_SESSION_TICKET_B:
561                         ret=ssl3_get_new_session_ticket(s);
562                         if (ret <= 0) goto end;
563                         s->state=SSL3_ST_CR_FINISHED_A;
564                         s->init_num=0;
565                 break;
566
567                 case SSL3_ST_CR_CERT_STATUS_A:
568                 case SSL3_ST_CR_CERT_STATUS_B:
569                         ret=ssl3_get_cert_status(s);
570                         if (ret <= 0) goto end;
571                         s->state=SSL3_ST_CR_KEY_EXCH_A;
572                         s->init_num=0;
573                 break;
574 #endif
575
576                 case SSL3_ST_CR_FINISHED_A:
577                 case SSL3_ST_CR_FINISHED_B:
578
579                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
580                                 SSL3_ST_CR_FINISHED_B);
581                         if (ret <= 0) goto end;
582
583                         if (s->hit)
584                                 s->state=SSL3_ST_CW_CHANGE_A;
585                         else
586                                 s->state=SSL_ST_OK;
587                         s->init_num=0;
588                         break;
589
590                 case SSL3_ST_CW_FLUSH:
591                         s->rwstate=SSL_WRITING;
592                         if (BIO_flush(s->wbio) <= 0)
593                                 {
594                                 ret= -1;
595                                 goto end;
596                                 }
597                         s->rwstate=SSL_NOTHING;
598                         s->state=s->s3->tmp.next_state;
599                         break;
600
601                 case SSL_ST_OK:
602                         /* clean a few things up */
603                         ssl3_cleanup_key_block(s);
604
605                         if (s->init_buf != NULL)
606                                 {
607                                 BUF_MEM_free(s->init_buf);
608                                 s->init_buf=NULL;
609                                 }
610
611                         /* If we are not 'joining' the last two packets,
612                          * remove the buffering now */
613                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
614                                 ssl_free_wbio_buffer(s);
615                         /* else do it later in ssl3_write */
616
617                         s->init_num=0;
618                         s->renegotiate=0;
619                         s->new_session=0;
620
621                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
622                         if (s->hit) s->ctx->stats.sess_hit++;
623
624                         ret=1;
625                         /* s->server=0; */
626                         s->handshake_func=ssl3_connect;
627                         s->ctx->stats.sess_connect_good++;
628
629                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
630
631                         goto end;
632                         /* break; */
633                         
634                 default:
635                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
636                         ret= -1;
637                         goto end;
638                         /* break; */
639                         }
640
641                 /* did we do anything */
642                 if (!s->s3->tmp.reuse_message && !skip)
643                         {
644                         if (s->debug)
645                                 {
646                                 if ((ret=BIO_flush(s->wbio)) <= 0)
647                                         goto end;
648                                 }
649
650                         if ((cb != NULL) && (s->state != state))
651                                 {
652                                 new_state=s->state;
653                                 s->state=state;
654                                 cb(s,SSL_CB_CONNECT_LOOP,1);
655                                 s->state=new_state;
656                                 }
657                         }
658                 skip=0;
659                 }
660 end:
661         s->in_handshake--;
662         if (buf != NULL)
663                 BUF_MEM_free(buf);
664         if (cb != NULL)
665                 cb(s,SSL_CB_CONNECT_EXIT,ret);
666         return(ret);
667         }
668
669
670 int ssl3_client_hello(SSL *s)
671         {
672         unsigned char *buf;
673         unsigned char *p,*d;
674         int i;
675         unsigned long Time,l;
676 #ifndef OPENSSL_NO_COMP
677         int j;
678         SSL_COMP *comp;
679 #endif
680
681         buf=(unsigned char *)s->init_buf->data;
682         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
683                 {
684                 SSL_SESSION *sess = s->session;
685                 if ((sess == NULL) ||
686                         (sess->ssl_version != s->version) ||
687 #ifdef OPENSSL_NO_TLSEXT
688                         !sess->session_id_length ||
689 #else
690                         (!sess->session_id_length && !sess->tlsext_tick) ||
691 #endif
692                         (sess->not_resumable))
693                         {
694                         if (!ssl_get_new_session(s,0))
695                                 goto err;
696                         }
697                 /* else use the pre-loaded session */
698
699                 p=s->s3->client_random;
700
701                 /* for DTLS if client_random is initialized, reuse it, we are
702                  * required to use same upon reply to HelloVerify */
703                 if (SSL_IS_DTLS(s))
704                         {
705                         size_t idx;
706                         i = 1;
707                         for (idx=0; idx < sizeof(s->s3->client_random); idx++)
708                                 {
709                                 if (p[idx])
710                                         {
711                                         i = 0;
712                                         break;
713                                         }
714                                 }
715                         }
716                 else 
717                         i = 1;
718
719                 if (i)
720                         {
721                         Time=(unsigned long)time(NULL); /* Time */
722                         l2n(Time,p);
723                         RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
724                         }
725
726                 /* Do the message type and length last */
727                 d=p= ssl_handshake_start(s);
728
729                 /* version indicates the negotiated version: for example from
730                  * an SSLv2/v3 compatible client hello). The client_version
731                  * field is the maximum version we permit and it is also
732                  * used in RSA encrypted premaster secrets. Some servers can
733                  * choke if we initially report a higher version then
734                  * renegotiate to a lower one in the premaster secret. This
735                  * didn't happen with TLS 1.0 as most servers supported it
736                  * but it can with TLS 1.1 or later if the server only supports
737                  * 1.0.
738                  *
739                  * Possible scenario with previous logic:
740                  *      1. Client hello indicates TLS 1.2
741                  *      2. Server hello says TLS 1.0
742                  *      3. RSA encrypted premaster secret uses 1.2.
743                  *      4. Handhaked proceeds using TLS 1.0.
744                  *      5. Server sends hello request to renegotiate.
745                  *      6. Client hello indicates TLS v1.0 as we now
746                  *         know that is maximum server supports.
747                  *      7. Server chokes on RSA encrypted premaster secret
748                  *         containing version 1.0.
749                  *
750                  * For interoperability it should be OK to always use the
751                  * maximum version we support in client hello and then rely
752                  * on the checking of version to ensure the servers isn't
753                  * being inconsistent: for example initially negotiating with
754                  * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
755                  * client_version in client hello and not resetting it to
756                  * the negotiated version.
757                  */
758 #if 0
759                 *(p++)=s->version>>8;
760                 *(p++)=s->version&0xff;
761                 s->client_version=s->version;
762 #else
763                 *(p++)=s->client_version>>8;
764                 *(p++)=s->client_version&0xff;
765 #endif
766
767                 /* Random stuff */
768                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
769                 p+=SSL3_RANDOM_SIZE;
770
771                 /* Session ID */
772                 if (s->new_session)
773                         i=0;
774                 else
775                         i=s->session->session_id_length;
776                 *(p++)=i;
777                 if (i != 0)
778                         {
779                         if (i > (int)sizeof(s->session->session_id))
780                                 {
781                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
782                                 goto err;
783                                 }
784                         memcpy(p,s->session->session_id,i);
785                         p+=i;
786                         }
787                 
788                 /* cookie stuff for DTLS */
789                 if (SSL_IS_DTLS(s))
790                         {
791                         if ( s->d1->cookie_len > sizeof(s->d1->cookie))
792                                 {
793                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
794                                 goto err;
795                                 }
796                         *(p++) = s->d1->cookie_len;
797                         memcpy(p, s->d1->cookie, s->d1->cookie_len);
798                         p += s->d1->cookie_len;
799                         }
800                 
801                 /* Ciphers supported */
802                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
803                 if (i == 0)
804                         {
805                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
806                         goto err;
807                         }
808 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
809                         /* Some servers hang if client hello > 256 bytes
810                          * as hack workaround chop number of supported ciphers
811                          * to keep it well below this if we use TLS v1.2
812                          */
813                         if (TLS1_get_version(s) >= TLS1_2_VERSION
814                                 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
815                                 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
816 #endif
817                 s2n(i,p);
818                 p+=i;
819
820                 /* COMPRESSION */
821 #ifdef OPENSSL_NO_COMP
822                 *(p++)=1;
823 #else
824
825                 if ((s->options & SSL_OP_NO_COMPRESSION)
826                                         || !s->ctx->comp_methods)
827                         j=0;
828                 else
829                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
830                 *(p++)=1+j;
831                 for (i=0; i<j; i++)
832                         {
833                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
834                         *(p++)=comp->id;
835                         }
836 #endif
837                 *(p++)=0; /* Add the NULL method */
838
839 #ifndef OPENSSL_NO_TLSEXT
840                 /* TLS extensions*/
841                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
842                         {
843                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
844                         goto err;
845                         }
846                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
847                         {
848                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
849                         goto err;
850                         }
851 #endif
852                 
853                 l= p-d;
854                 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
855                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
856                 }
857
858         /* SSL3_ST_CW_CLNT_HELLO_B */
859         return ssl_do_write(s);
860 err:
861         return(-1);
862         }
863
864 int ssl3_get_server_hello(SSL *s)
865         {
866         STACK_OF(SSL_CIPHER) *sk;
867         const SSL_CIPHER *c;
868         CERT *ct = s->cert;
869         unsigned char *p,*d;
870         int i,al=SSL_AD_INTERNAL_ERROR,ok;
871         unsigned int j;
872         long n;
873 #ifndef OPENSSL_NO_COMP
874         SSL_COMP *comp;
875 #endif
876
877         n=s->method->ssl_get_message(s,
878                 SSL3_ST_CR_SRVR_HELLO_A,
879                 SSL3_ST_CR_SRVR_HELLO_B,
880                 -1,
881                 20000, /* ?? */
882                 &ok);
883
884         if (!ok) return((int)n);
885
886         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
887                 {
888                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
889                         {
890                         if ( s->d1->send_cookie == 0)
891                                 {
892                                 s->s3->tmp.reuse_message = 1;
893                                 return 1;
894                                 }
895                         else /* already sent a cookie */
896                                 {
897                                 al=SSL_AD_UNEXPECTED_MESSAGE;
898                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
899                                 goto f_err;
900                                 }
901                         }
902                 }
903         
904         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
905                 {
906                 al=SSL_AD_UNEXPECTED_MESSAGE;
907                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
908                 goto f_err;
909                 }
910
911         d=p=(unsigned char *)s->init_msg;
912
913         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
914                 {
915                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
916                 s->version=(s->version&0xff00)|p[1];
917                 al=SSL_AD_PROTOCOL_VERSION;
918                 goto f_err;
919                 }
920         p+=2;
921
922         /* load the server hello data */
923         /* load the server random */
924         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
925         p+=SSL3_RANDOM_SIZE;
926
927         /* get the session-id */
928         j= *(p++);
929
930         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
931                 {
932                 al=SSL_AD_ILLEGAL_PARAMETER;
933                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
934                 goto f_err;
935                 }
936
937 #ifndef OPENSSL_NO_TLSEXT
938         /* check if we want to resume the session based on external pre-shared secret */
939         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
940                 {
941                 SSL_CIPHER *pref_cipher=NULL;
942                 s->session->master_key_length=sizeof(s->session->master_key);
943                 if (s->tls_session_secret_cb(s, s->session->master_key,
944                                              &s->session->master_key_length,
945                                              NULL, &pref_cipher,
946                                              s->tls_session_secret_cb_arg))
947                         {
948                         s->session->cipher = pref_cipher ?
949                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
950                         }
951                 }
952 #endif /* OPENSSL_NO_TLSEXT */
953
954         if (j != 0 && j == s->session->session_id_length
955             && memcmp(p,s->session->session_id,j) == 0)
956             {
957             if(s->sid_ctx_length != s->session->sid_ctx_length
958                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
959                 {
960                 /* actually a client application bug */
961                 al=SSL_AD_ILLEGAL_PARAMETER;
962                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
963                 goto f_err;
964                 }
965             s->hit=1;
966             }
967         else    /* a miss or crap from the other end */
968                 {
969                 /* If we were trying for session-id reuse, make a new
970                  * SSL_SESSION so we don't stuff up other people */
971                 s->hit=0;
972                 if (s->session->session_id_length > 0)
973                         {
974                         if (!ssl_get_new_session(s,0))
975                                 {
976                                 goto f_err;
977                                 }
978                         }
979                 s->session->session_id_length=j;
980                 memcpy(s->session->session_id,p,j); /* j could be 0 */
981                 }
982         p+=j;
983         c=ssl_get_cipher_by_char(s,p);
984         if (c == NULL)
985                 {
986                 /* unknown cipher */
987                 al=SSL_AD_ILLEGAL_PARAMETER;
988                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
989                 goto f_err;
990                 }
991         /* If it is a disabled cipher we didn't send it in client hello,
992          * so return an error.
993          */
994         if (c->algorithm_ssl & ct->mask_ssl ||
995                 c->algorithm_mkey & ct->mask_k ||
996                 c->algorithm_auth & ct->mask_a)
997                 {
998                 al=SSL_AD_ILLEGAL_PARAMETER;
999                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1000                 goto f_err;
1001                 }
1002         p+=ssl_put_cipher_by_char(s,NULL,NULL);
1003
1004         sk=ssl_get_ciphers_by_id(s);
1005         i=sk_SSL_CIPHER_find(sk,c);
1006         if (i < 0)
1007                 {
1008                 /* we did not say we would use this cipher */
1009                 al=SSL_AD_ILLEGAL_PARAMETER;
1010                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1011                 goto f_err;
1012                 }
1013
1014         /* Depending on the session caching (internal/external), the cipher
1015            and/or cipher_id values may not be set. Make sure that
1016            cipher_id is set and use it for comparison. */
1017         if (s->session->cipher)
1018                 s->session->cipher_id = s->session->cipher->id;
1019         if (s->hit && (s->session->cipher_id != c->id))
1020                 {
1021 /* Workaround is now obsolete */
1022 #if 0
1023                 if (!(s->options &
1024                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1025 #endif
1026                         {
1027                         al=SSL_AD_ILLEGAL_PARAMETER;
1028                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1029                         goto f_err;
1030                         }
1031                 }
1032         s->s3->tmp.new_cipher=c;
1033         /* Don't digest cached records if no sigalgs: we may need them for
1034          * client authentication.
1035          */
1036         if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1037                 goto f_err;
1038         /* lets get the compression algorithm */
1039         /* COMPRESSION */
1040 #ifdef OPENSSL_NO_COMP
1041         if (*(p++) != 0)
1042                 {
1043                 al=SSL_AD_ILLEGAL_PARAMETER;
1044                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1045                 goto f_err;
1046                 }
1047         /* If compression is disabled we'd better not try to resume a session
1048          * using compression.
1049          */
1050         if (s->session->compress_meth != 0)
1051                 {
1052                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1053                 goto f_err;
1054                 }
1055 #else
1056         j= *(p++);
1057         if (s->hit && j != s->session->compress_meth)
1058                 {
1059                 al=SSL_AD_ILLEGAL_PARAMETER;
1060                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1061                 goto f_err;
1062                 }
1063         if (j == 0)
1064                 comp=NULL;
1065         else if (s->options & SSL_OP_NO_COMPRESSION)
1066                 {
1067                 al=SSL_AD_ILLEGAL_PARAMETER;
1068                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1069                 goto f_err;
1070                 }
1071         else
1072                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1073         
1074         if ((j != 0) && (comp == NULL))
1075                 {
1076                 al=SSL_AD_ILLEGAL_PARAMETER;
1077                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1078                 goto f_err;
1079                 }
1080         else
1081                 {
1082                 s->s3->tmp.new_compression=comp;
1083                 }
1084 #endif
1085
1086 #ifndef OPENSSL_NO_TLSEXT
1087         /* TLS extensions*/
1088         if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1089                 {
1090                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1091                 goto err; 
1092                 }
1093 #endif
1094
1095         if (p != (d+n))
1096                 {
1097                 /* wrong packet length */
1098                 al=SSL_AD_DECODE_ERROR;
1099                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1100                 goto f_err;
1101                 }
1102
1103         return(1);
1104 f_err:
1105         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1106 err:
1107         return(-1);
1108         }
1109
1110 int ssl3_get_server_certificate(SSL *s)
1111         {
1112         int al,i,ok,ret= -1;
1113         unsigned long n,nc,llen,l;
1114         X509 *x=NULL;
1115         const unsigned char *q,*p;
1116         unsigned char *d;
1117         STACK_OF(X509) *sk=NULL;
1118         SESS_CERT *sc;
1119         EVP_PKEY *pkey=NULL;
1120         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1121
1122         n=s->method->ssl_get_message(s,
1123                 SSL3_ST_CR_CERT_A,
1124                 SSL3_ST_CR_CERT_B,
1125                 -1,
1126                 s->max_cert_list,
1127                 &ok);
1128
1129         if (!ok) return((int)n);
1130
1131         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1132                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 
1133                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1134                 {
1135                 s->s3->tmp.reuse_message=1;
1136                 return(1);
1137                 }
1138
1139         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1140                 {
1141                 al=SSL_AD_UNEXPECTED_MESSAGE;
1142                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1143                 goto f_err;
1144                 }
1145         p=d=(unsigned char *)s->init_msg;
1146
1147         if ((sk=sk_X509_new_null()) == NULL)
1148                 {
1149                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1150                 goto err;
1151                 }
1152
1153         n2l3(p,llen);
1154         if (llen+3 != n)
1155                 {
1156                 al=SSL_AD_DECODE_ERROR;
1157                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1158                 goto f_err;
1159                 }
1160         for (nc=0; nc<llen; )
1161                 {
1162                 n2l3(p,l);
1163                 if ((l+nc+3) > llen)
1164                         {
1165                         al=SSL_AD_DECODE_ERROR;
1166                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1167                         goto f_err;
1168                         }
1169
1170                 q=p;
1171                 x=d2i_X509(NULL,&q,l);
1172                 if (x == NULL)
1173                         {
1174                         al=SSL_AD_BAD_CERTIFICATE;
1175                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1176                         goto f_err;
1177                         }
1178                 if (q != (p+l))
1179                         {
1180                         al=SSL_AD_DECODE_ERROR;
1181                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1182                         goto f_err;
1183                         }
1184                 if (!sk_X509_push(sk,x))
1185                         {
1186                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1187                         goto err;
1188                         }
1189                 x=NULL;
1190                 nc+=l+3;
1191                 p=q;
1192                 }
1193
1194         i=ssl_verify_cert_chain(s,sk);
1195         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1196 #ifndef OPENSSL_NO_KRB5
1197             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1198                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1199 #endif /* OPENSSL_NO_KRB5 */
1200                 )
1201                 {
1202                 al=ssl_verify_alarm_type(s->verify_result);
1203                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1204                 goto f_err; 
1205                 }
1206         ERR_clear_error(); /* but we keep s->verify_result */
1207
1208         sc=ssl_sess_cert_new();
1209         if (sc == NULL) goto err;
1210
1211         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1212         s->session->sess_cert=sc;
1213
1214         sc->cert_chain=sk;
1215         /* Inconsistency alert: cert_chain does include the peer's
1216          * certificate, which we don't include in s3_srvr.c */
1217         x=sk_X509_value(sk,0);
1218         sk=NULL;
1219         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1220
1221         pkey=X509_get_pubkey(x);
1222
1223         /* VRS: allow null cert if auth == KRB5 */
1224         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1225                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1226                     ? 0 : 1;
1227
1228 #ifdef KSSL_DEBUG
1229         printf("pkey,x = %p, %p\n", pkey,x);
1230         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1231         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1232                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1233 #endif    /* KSSL_DEBUG */
1234
1235         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1236                 {
1237                 x=NULL;
1238                 al=SSL3_AL_FATAL;
1239                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1240                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1241                 goto f_err;
1242                 }
1243
1244         i=ssl_cert_type(x,pkey);
1245         if (need_cert && i < 0)
1246                 {
1247                 x=NULL;
1248                 al=SSL3_AL_FATAL;
1249                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1250                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1251                 goto f_err;
1252                 }
1253
1254         if (need_cert)
1255                 {
1256                 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1257                 if (exp_idx >= 0 && i != exp_idx)
1258                         {
1259                         x=NULL;
1260                         al=SSL_AD_ILLEGAL_PARAMETER;
1261                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1262                                 SSL_R_WRONG_CERTIFICATE_TYPE);
1263                         goto f_err;
1264                         }
1265                 sc->peer_cert_type=i;
1266                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1267                 /* Why would the following ever happen?
1268                  * We just created sc a couple of lines ago. */
1269                 if (sc->peer_pkeys[i].x509 != NULL)
1270                         X509_free(sc->peer_pkeys[i].x509);
1271                 sc->peer_pkeys[i].x509=x;
1272                 sc->peer_key= &(sc->peer_pkeys[i]);
1273
1274                 if (s->session->peer != NULL)
1275                         X509_free(s->session->peer);
1276                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1277                 s->session->peer=x;
1278                 }
1279         else
1280                 {
1281                 sc->peer_cert_type=i;
1282                 sc->peer_key= NULL;
1283
1284                 if (s->session->peer != NULL)
1285                         X509_free(s->session->peer);
1286                 s->session->peer=NULL;
1287                 }
1288         s->session->verify_result = s->verify_result;
1289
1290         x=NULL;
1291 #ifndef OPENSSL_NO_TLSEXT
1292         /* Check the audit proof. */
1293         if (s->ctx->tlsext_authz_server_audit_proof_cb)
1294                 {
1295                 ret = s->ctx->tlsext_authz_server_audit_proof_cb(s,
1296                         s->ctx->tlsext_authz_server_audit_proof_cb_arg);
1297                 if (ret <= 0)
1298                         {
1299                         al = SSL_AD_BAD_CERTIFICATE;
1300                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_INVALID_AUDIT_PROOF);
1301                         goto f_err;
1302                         }
1303                 }
1304
1305 #endif
1306         ret=1;
1307         if (0)
1308                 {
1309 f_err:
1310                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1311                 }
1312 err:
1313         EVP_PKEY_free(pkey);
1314         X509_free(x);
1315         sk_X509_pop_free(sk,X509_free);
1316         return(ret);
1317         }
1318
1319 int ssl3_get_key_exchange(SSL *s)
1320         {
1321 #ifndef OPENSSL_NO_RSA
1322         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1323 #endif
1324         EVP_MD_CTX md_ctx;
1325         unsigned char *param,*p;
1326         int al,i,j,param_len,ok;
1327         long n,alg_k,alg_a;
1328         EVP_PKEY *pkey=NULL;
1329         const EVP_MD *md = NULL;
1330 #ifndef OPENSSL_NO_RSA
1331         RSA *rsa=NULL;
1332 #endif
1333 #ifndef OPENSSL_NO_DH
1334         DH *dh=NULL;
1335 #endif
1336 #ifndef OPENSSL_NO_ECDH
1337         EC_KEY *ecdh = NULL;
1338         BN_CTX *bn_ctx = NULL;
1339         EC_POINT *srvr_ecpoint = NULL;
1340         int curve_nid = 0;
1341         int encoded_pt_len = 0;
1342 #endif
1343
1344         /* use same message size as in ssl3_get_certificate_request()
1345          * as ServerKeyExchange message may be skipped */
1346         n=s->method->ssl_get_message(s,
1347                 SSL3_ST_CR_KEY_EXCH_A,
1348                 SSL3_ST_CR_KEY_EXCH_B,
1349                 -1,
1350                 s->max_cert_list,
1351                 &ok);
1352         if (!ok) return((int)n);
1353
1354         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1355                 {
1356 #ifndef OPENSSL_NO_PSK
1357                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1358                    omitted if no identity hint is sent. Set
1359                    session->sess_cert anyway to avoid problems
1360                    later.*/
1361                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1362                         {
1363                         s->session->sess_cert=ssl_sess_cert_new();
1364                         if (s->ctx->psk_identity_hint)
1365                                 OPENSSL_free(s->ctx->psk_identity_hint);
1366                         s->ctx->psk_identity_hint = NULL;
1367                         }
1368 #endif
1369                 s->s3->tmp.reuse_message=1;
1370                 return(1);
1371                 }
1372
1373         param=p=(unsigned char *)s->init_msg;
1374         if (s->session->sess_cert != NULL)
1375                 {
1376 #ifndef OPENSSL_NO_RSA
1377                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1378                         {
1379                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1380                         s->session->sess_cert->peer_rsa_tmp=NULL;
1381                         }
1382 #endif
1383 #ifndef OPENSSL_NO_DH
1384                 if (s->session->sess_cert->peer_dh_tmp)
1385                         {
1386                         DH_free(s->session->sess_cert->peer_dh_tmp);
1387                         s->session->sess_cert->peer_dh_tmp=NULL;
1388                         }
1389 #endif
1390 #ifndef OPENSSL_NO_ECDH
1391                 if (s->session->sess_cert->peer_ecdh_tmp)
1392                         {
1393                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1394                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1395                         }
1396 #endif
1397                 }
1398         else
1399                 {
1400                 s->session->sess_cert=ssl_sess_cert_new();
1401                 }
1402
1403         param_len=0;
1404         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1405         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1406         EVP_MD_CTX_init(&md_ctx);
1407
1408 #ifndef OPENSSL_NO_PSK
1409         if (alg_k & SSL_kPSK)
1410                 {
1411                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1412
1413                 al=SSL_AD_HANDSHAKE_FAILURE;
1414                 n2s(p,i);
1415                 param_len=i+2;
1416                 /* Store PSK identity hint for later use, hint is used
1417                  * in ssl3_send_client_key_exchange.  Assume that the
1418                  * maximum length of a PSK identity hint can be as
1419                  * long as the maximum length of a PSK identity. */
1420                 if (i > PSK_MAX_IDENTITY_LEN)
1421                         {
1422                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1423                                 SSL_R_DATA_LENGTH_TOO_LONG);
1424                         goto f_err;
1425                         }
1426                 if (param_len > n)
1427                         {
1428                         al=SSL_AD_DECODE_ERROR;
1429                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1430                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1431                         goto f_err;
1432                         }
1433                 /* If received PSK identity hint contains NULL
1434                  * characters, the hint is truncated from the first
1435                  * NULL. p may not be ending with NULL, so create a
1436                  * NULL-terminated string. */
1437                 memcpy(tmp_id_hint, p, i);
1438                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1439                 if (s->ctx->psk_identity_hint != NULL)
1440                         OPENSSL_free(s->ctx->psk_identity_hint);
1441                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1442                 if (s->ctx->psk_identity_hint == NULL)
1443                         {
1444                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1445                         goto f_err;
1446                         }          
1447
1448                 p+=i;
1449                 n-=param_len;
1450                 }
1451         else
1452 #endif /* !OPENSSL_NO_PSK */
1453 #ifndef OPENSSL_NO_SRP
1454         if (alg_k & SSL_kSRP)
1455                 {
1456                 n2s(p,i);
1457                 param_len=i+2;
1458                 if (param_len > n)
1459                         {
1460                         al=SSL_AD_DECODE_ERROR;
1461                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1462                         goto f_err;
1463                         }
1464                 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1465                         {
1466                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1467                         goto err;
1468                         }
1469                 p+=i;
1470
1471                 n2s(p,i);
1472                 param_len+=i+2;
1473                 if (param_len > n)
1474                         {
1475                         al=SSL_AD_DECODE_ERROR;
1476                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1477                         goto f_err;
1478                         }
1479                 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1480                         {
1481                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1482                         goto err;
1483                         }
1484                 p+=i;
1485
1486                 i = (unsigned int)(p[0]);
1487                 p++;
1488                 param_len+=i+1;
1489                 if (param_len > n)
1490                         {
1491                         al=SSL_AD_DECODE_ERROR;
1492                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1493                         goto f_err;
1494                         }
1495                 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1496                         {
1497                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1498                         goto err;
1499                         }
1500                 p+=i;
1501
1502                 n2s(p,i);
1503                 param_len+=i+2;
1504                 if (param_len > n)
1505                         {
1506                         al=SSL_AD_DECODE_ERROR;
1507                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1508                         goto f_err;
1509                         }
1510                 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1511                         {
1512                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1513                         goto err;
1514                         }
1515                 p+=i;
1516                 n-=param_len;
1517
1518 /* We must check if there is a certificate */
1519 #ifndef OPENSSL_NO_RSA
1520                 if (alg_a & SSL_aRSA)
1521                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1522 #else
1523                 if (0)
1524                         ;
1525 #endif
1526 #ifndef OPENSSL_NO_DSA
1527                 else if (alg_a & SSL_aDSS)
1528                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1529 #endif
1530                 }
1531         else
1532 #endif /* !OPENSSL_NO_SRP */
1533 #ifndef OPENSSL_NO_RSA
1534         if (alg_k & SSL_kRSA)
1535                 {
1536                 if ((rsa=RSA_new()) == NULL)
1537                         {
1538                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1539                         goto err;
1540                         }
1541                 n2s(p,i);
1542                 param_len=i+2;
1543                 if (param_len > n)
1544                         {
1545                         al=SSL_AD_DECODE_ERROR;
1546                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1547                         goto f_err;
1548                         }
1549                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1550                         {
1551                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1552                         goto err;
1553                         }
1554                 p+=i;
1555
1556                 n2s(p,i);
1557                 param_len+=i+2;
1558                 if (param_len > n)
1559                         {
1560                         al=SSL_AD_DECODE_ERROR;
1561                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1562                         goto f_err;
1563                         }
1564                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1565                         {
1566                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1567                         goto err;
1568                         }
1569                 p+=i;
1570                 n-=param_len;
1571
1572                 /* this should be because we are using an export cipher */
1573                 if (alg_a & SSL_aRSA)
1574                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1575                 else
1576                         {
1577                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1578                         goto err;
1579                         }
1580                 s->session->sess_cert->peer_rsa_tmp=rsa;
1581                 rsa=NULL;
1582                 }
1583 #else /* OPENSSL_NO_RSA */
1584         if (0)
1585                 ;
1586 #endif
1587 #ifndef OPENSSL_NO_DH
1588         else if (alg_k & SSL_kEDH)
1589                 {
1590                 if ((dh=DH_new()) == NULL)
1591                         {
1592                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1593                         goto err;
1594                         }
1595                 n2s(p,i);
1596                 param_len=i+2;
1597                 if (param_len > n)
1598                         {
1599                         al=SSL_AD_DECODE_ERROR;
1600                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1601                         goto f_err;
1602                         }
1603                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1604                         {
1605                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1606                         goto err;
1607                         }
1608                 p+=i;
1609
1610                 n2s(p,i);
1611                 param_len+=i+2;
1612                 if (param_len > n)
1613                         {
1614                         al=SSL_AD_DECODE_ERROR;
1615                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1616                         goto f_err;
1617                         }
1618                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1619                         {
1620                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1621                         goto err;
1622                         }
1623                 p+=i;
1624
1625                 n2s(p,i);
1626                 param_len+=i+2;
1627                 if (param_len > n)
1628                         {
1629                         al=SSL_AD_DECODE_ERROR;
1630                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1631                         goto f_err;
1632                         }
1633                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1634                         {
1635                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1636                         goto err;
1637                         }
1638                 p+=i;
1639                 n-=param_len;
1640
1641 #ifndef OPENSSL_NO_RSA
1642                 if (alg_a & SSL_aRSA)
1643                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1644 #else
1645                 if (0)
1646                         ;
1647 #endif
1648 #ifndef OPENSSL_NO_DSA
1649                 else if (alg_a & SSL_aDSS)
1650                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1651 #endif
1652                 /* else anonymous DH, so no certificate or pkey. */
1653
1654                 s->session->sess_cert->peer_dh_tmp=dh;
1655                 dh=NULL;
1656                 }
1657         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1658                 {
1659                 al=SSL_AD_ILLEGAL_PARAMETER;
1660                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1661                 goto f_err;
1662                 }
1663 #endif /* !OPENSSL_NO_DH */
1664
1665 #ifndef OPENSSL_NO_ECDH
1666         else if (alg_k & SSL_kEECDH)
1667                 {
1668                 EC_GROUP *ngroup;
1669                 const EC_GROUP *group;
1670
1671                 if ((ecdh=EC_KEY_new()) == NULL)
1672                         {
1673                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1674                         goto err;
1675                         }
1676
1677                 /* Extract elliptic curve parameters and the
1678                  * server's ephemeral ECDH public key.
1679                  * Keep accumulating lengths of various components in
1680                  * param_len and make sure it never exceeds n.
1681                  */
1682
1683                 /* XXX: For now we only support named (not generic) curves
1684                  * and the ECParameters in this case is just three bytes.
1685                  */
1686                 param_len=3;
1687                 /* Check curve is one of our prefrences, if not server has
1688                  * sent an invalid curve.
1689                  */
1690                 if (!tls1_check_curve(s, p, param_len))
1691                         {
1692                         al=SSL_AD_DECODE_ERROR;
1693                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1694                         goto f_err;
1695                         }
1696
1697                 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) 
1698                         {
1699                         al=SSL_AD_INTERNAL_ERROR;
1700                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1701                         goto f_err;
1702                         }
1703
1704                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1705                 if (ngroup == NULL)
1706                         {
1707                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1708                         goto err;
1709                         }
1710                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1711                         {
1712                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1713                         goto err;
1714                         }
1715                 EC_GROUP_free(ngroup);
1716
1717                 group = EC_KEY_get0_group(ecdh);
1718
1719                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1720                     (EC_GROUP_get_degree(group) > 163))
1721                         {
1722                         al=SSL_AD_EXPORT_RESTRICTION;
1723                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1724                         goto f_err;
1725                         }
1726
1727                 p+=3;
1728
1729                 /* Next, get the encoded ECPoint */
1730                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1731                     ((bn_ctx = BN_CTX_new()) == NULL))
1732                         {
1733                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1734                         goto err;
1735                         }
1736
1737                 encoded_pt_len = *p;  /* length of encoded point */
1738                 p+=1;
1739                 param_len += (1 + encoded_pt_len);
1740                 if ((param_len > n) ||
1741                     (EC_POINT_oct2point(group, srvr_ecpoint, 
1742                         p, encoded_pt_len, bn_ctx) == 0))
1743                         {
1744                         al=SSL_AD_DECODE_ERROR;
1745                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1746                         goto f_err;
1747                         }
1748
1749                 n-=param_len;
1750                 p+=encoded_pt_len;
1751
1752                 /* The ECC/TLS specification does not mention
1753                  * the use of DSA to sign ECParameters in the server
1754                  * key exchange message. We do support RSA and ECDSA.
1755                  */
1756                 if (0) ;
1757 #ifndef OPENSSL_NO_RSA
1758                 else if (alg_a & SSL_aRSA)
1759                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1760 #endif
1761 #ifndef OPENSSL_NO_ECDSA
1762                 else if (alg_a & SSL_aECDSA)
1763                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1764 #endif
1765                 /* else anonymous ECDH, so no certificate or pkey. */
1766                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1767                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1768                 ecdh=NULL;
1769                 BN_CTX_free(bn_ctx);
1770                 bn_ctx = NULL;
1771                 EC_POINT_free(srvr_ecpoint);
1772                 srvr_ecpoint = NULL;
1773                 }
1774         else if (alg_k)
1775                 {
1776                 al=SSL_AD_UNEXPECTED_MESSAGE;
1777                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1778                 goto f_err;
1779                 }
1780 #endif /* !OPENSSL_NO_ECDH */
1781
1782
1783         /* p points to the next byte, there are 'n' bytes left */
1784
1785         /* if it was signed, check the signature */
1786         if (pkey != NULL)
1787                 {
1788                 if (SSL_USE_SIGALGS(s))
1789                         {
1790                         int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1791                         if (rv == -1)
1792                                 goto err;
1793                         else if (rv == 0)
1794                                 {
1795                                 al = SSL_AD_DECODE_ERROR;
1796                                 goto f_err;
1797                                 }
1798 #ifdef SSL_DEBUG
1799 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1800 #endif
1801                         p += 2;
1802                         n -= 2;
1803                         }
1804                 else
1805                         md = EVP_sha1();
1806                         
1807                 n2s(p,i);
1808                 n-=2;
1809                 j=EVP_PKEY_size(pkey);
1810
1811                 if ((i != n) || (n > j) || (n <= 0))
1812                         {
1813                         /* wrong packet length */
1814                         al=SSL_AD_DECODE_ERROR;
1815                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1816                         goto f_err;
1817                         }
1818
1819 #ifndef OPENSSL_NO_RSA
1820                 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1821                         {
1822                         int num;
1823
1824                         j=0;
1825                         q=md_buf;
1826                         for (num=2; num > 0; num--)
1827                                 {
1828                                 EVP_MD_CTX_set_flags(&md_ctx,
1829                                         EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1830                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1831                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1832                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1833                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1834                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1835                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1836                                 q+=i;
1837                                 j+=i;
1838                                 }
1839                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1840                                                                 pkey->pkey.rsa);
1841                         if (i < 0)
1842                                 {
1843                                 al=SSL_AD_DECRYPT_ERROR;
1844                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1845                                 goto f_err;
1846                                 }
1847                         if (i == 0)
1848                                 {
1849                                 /* bad signature */
1850                                 al=SSL_AD_DECRYPT_ERROR;
1851                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1852                                 goto f_err;
1853                                 }
1854                         }
1855                 else
1856 #endif
1857                         {
1858                         EVP_VerifyInit_ex(&md_ctx, md, NULL);
1859                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1860                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1861                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1862                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1863                                 {
1864                                 /* bad signature */
1865                                 al=SSL_AD_DECRYPT_ERROR;
1866                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1867                                 goto f_err;
1868                                 }
1869                         }
1870                 }
1871         else
1872                 {
1873                 /* aNULL or kPSK do not need public keys */
1874                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1875                         {
1876                         /* Might be wrong key type, check it */
1877                         if (ssl3_check_cert_and_algorithm(s))
1878                                 /* Otherwise this shouldn't happen */
1879                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1880                         goto err;
1881                         }
1882                 /* still data left over */
1883                 if (n != 0)
1884                         {
1885                         al=SSL_AD_DECODE_ERROR;
1886                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1887                         goto f_err;
1888                         }
1889                 }
1890         EVP_PKEY_free(pkey);
1891         EVP_MD_CTX_cleanup(&md_ctx);
1892         return(1);
1893 f_err:
1894         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1895 err:
1896         EVP_PKEY_free(pkey);
1897 #ifndef OPENSSL_NO_RSA
1898         if (rsa != NULL)
1899                 RSA_free(rsa);
1900 #endif
1901 #ifndef OPENSSL_NO_DH
1902         if (dh != NULL)
1903                 DH_free(dh);
1904 #endif
1905 #ifndef OPENSSL_NO_ECDH
1906         BN_CTX_free(bn_ctx);
1907         EC_POINT_free(srvr_ecpoint);
1908         if (ecdh != NULL)
1909                 EC_KEY_free(ecdh);
1910 #endif
1911         EVP_MD_CTX_cleanup(&md_ctx);
1912         return(-1);
1913         }
1914
1915 int ssl3_get_certificate_request(SSL *s)
1916         {
1917         int ok,ret=0;
1918         unsigned long n,nc,l;
1919         unsigned int llen, ctype_num,i;
1920         X509_NAME *xn=NULL;
1921         const unsigned char *p,*q;
1922         unsigned char *d;
1923         STACK_OF(X509_NAME) *ca_sk=NULL;
1924
1925         n=s->method->ssl_get_message(s,
1926                 SSL3_ST_CR_CERT_REQ_A,
1927                 SSL3_ST_CR_CERT_REQ_B,
1928                 -1,
1929                 s->max_cert_list,
1930                 &ok);
1931
1932         if (!ok) return((int)n);
1933
1934         s->s3->tmp.cert_req=0;
1935
1936         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1937                 {
1938                 s->s3->tmp.reuse_message=1;
1939                 /* If we get here we don't need any cached handshake records
1940                  * as we wont be doing client auth.
1941                  */
1942                 if (s->s3->handshake_buffer)
1943                         {
1944                         if (!ssl3_digest_cached_records(s))
1945                                 goto err;
1946                         }
1947                 return(1);
1948                 }
1949
1950         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1951                 {
1952                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1953                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1954                 goto err;
1955                 }
1956
1957         /* TLS does not like anon-DH with client cert */
1958         if (s->version > SSL3_VERSION)
1959                 {
1960                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1961                         {
1962                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1963                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1964                         goto err;
1965                         }
1966                 }
1967
1968         p=d=(unsigned char *)s->init_msg;
1969
1970         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1971                 {
1972                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1973                 goto err;
1974                 }
1975
1976         /* get the certificate types */
1977         ctype_num= *(p++);
1978         if (s->cert->ctypes)
1979                 {
1980                 OPENSSL_free(s->cert->ctypes);
1981                 s->cert->ctypes = NULL;
1982                 }
1983         if (ctype_num > SSL3_CT_NUMBER)
1984                 {
1985                 /* If we exceed static buffer copy all to cert structure */
1986                 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1987                 memcpy(s->cert->ctypes, p, ctype_num);
1988                 s->cert->ctype_num = (size_t)ctype_num;
1989                 ctype_num=SSL3_CT_NUMBER;
1990                 }
1991         for (i=0; i<ctype_num; i++)
1992                 s->s3->tmp.ctype[i]= p[i];
1993         p+=p[-1];
1994         if (SSL_USE_SIGALGS(s))
1995                 {
1996                 n2s(p, llen);
1997                 /* Check we have enough room for signature algorithms and
1998                  * following length value.
1999                  */
2000                 if ((unsigned long)(p - d + llen + 2) > n)
2001                         {
2002                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2003                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2004                         goto err;
2005                         }
2006                 /* Clear certificate digests and validity flags */
2007                 for (i = 0; i < SSL_PKEY_NUM; i++)
2008                         {
2009                         s->cert->pkeys[i].digest = NULL;
2010                         s->cert->pkeys[i].valid_flags = 0;
2011                         }
2012                 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2013                         {
2014                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2015                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2016                         goto err;
2017                         }
2018                 p += llen;
2019                 }
2020
2021         /* get the CA RDNs */
2022         n2s(p,llen);
2023 #if 0
2024 {
2025 FILE *out;
2026 out=fopen("/tmp/vsign.der","w");
2027 fwrite(p,1,llen,out);
2028 fclose(out);
2029 }
2030 #endif
2031
2032         if ((unsigned long)(p - d + llen) != n)
2033                 {
2034                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2035                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2036                 goto err;
2037                 }
2038
2039         for (nc=0; nc<llen; )
2040                 {
2041                 n2s(p,l);
2042                 if ((l+nc+2) > llen)
2043                         {
2044                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2045                                 goto cont; /* netscape bugs */
2046                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2047                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2048                         goto err;
2049                         }
2050
2051                 q=p;
2052
2053                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2054                         {
2055                         /* If netscape tolerance is on, ignore errors */
2056                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2057                                 goto cont;
2058                         else
2059                                 {
2060                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2061                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2062                                 goto err;
2063                                 }
2064                         }
2065
2066                 if (q != (p+l))
2067                         {
2068                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2069                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2070                         goto err;
2071                         }
2072                 if (!sk_X509_NAME_push(ca_sk,xn))
2073                         {
2074                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2075                         goto err;
2076                         }
2077
2078                 p+=l;
2079                 nc+=l+2;
2080                 }
2081
2082         if (0)
2083                 {
2084 cont:
2085                 ERR_clear_error();
2086                 }
2087
2088         /* we should setup a certificate to return.... */
2089         s->s3->tmp.cert_req=1;
2090         s->s3->tmp.ctype_num=ctype_num;
2091         if (s->s3->tmp.ca_names != NULL)
2092                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2093         s->s3->tmp.ca_names=ca_sk;
2094         ca_sk=NULL;
2095
2096         ret=1;
2097 err:
2098         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2099         return(ret);
2100         }
2101
2102 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2103         {
2104         return(X509_NAME_cmp(*a,*b));
2105         }
2106 #ifndef OPENSSL_NO_TLSEXT
2107 int ssl3_get_new_session_ticket(SSL *s)
2108         {
2109         int ok,al,ret=0, ticklen;
2110         long n;
2111         const unsigned char *p;
2112         unsigned char *d;
2113
2114         n=s->method->ssl_get_message(s,
2115                 SSL3_ST_CR_SESSION_TICKET_A,
2116                 SSL3_ST_CR_SESSION_TICKET_B,
2117                 -1,
2118                 16384,
2119                 &ok);
2120
2121         if (!ok)
2122                 return((int)n);
2123
2124         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2125                 {
2126                 s->s3->tmp.reuse_message=1;
2127                 return(1);
2128                 }
2129         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2130                 {
2131                 al=SSL_AD_UNEXPECTED_MESSAGE;
2132                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2133                 goto f_err;
2134                 }
2135         if (n < 6)
2136                 {
2137                 /* need at least ticket_lifetime_hint + ticket length */
2138                 al = SSL_AD_DECODE_ERROR;
2139                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2140                 goto f_err;
2141                 }
2142
2143         p=d=(unsigned char *)s->init_msg;
2144         n2l(p, s->session->tlsext_tick_lifetime_hint);
2145         n2s(p, ticklen);
2146         /* ticket_lifetime_hint + ticket_length + ticket */
2147         if (ticklen + 6 != n)
2148                 {
2149                 al = SSL_AD_DECODE_ERROR;
2150                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2151                 goto f_err;
2152                 }
2153         if (s->session->tlsext_tick)
2154                 {
2155                 OPENSSL_free(s->session->tlsext_tick);
2156                 s->session->tlsext_ticklen = 0;
2157                 }
2158         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2159         if (!s->session->tlsext_tick)
2160                 {
2161                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2162                 goto err;
2163                 }
2164         memcpy(s->session->tlsext_tick, p, ticklen);
2165         s->session->tlsext_ticklen = ticklen;
2166         /* There are two ways to detect a resumed ticket sesion.
2167          * One is to set an appropriate session ID and then the server
2168          * must return a match in ServerHello. This allows the normal
2169          * client session ID matching to work and we know much 
2170          * earlier that the ticket has been accepted.
2171          * 
2172          * The other way is to set zero length session ID when the
2173          * ticket is presented and rely on the handshake to determine
2174          * session resumption.
2175          *
2176          * We choose the former approach because this fits in with
2177          * assumptions elsewhere in OpenSSL. The session ID is set
2178          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2179          * ticket.
2180          */ 
2181         EVP_Digest(p, ticklen,
2182                         s->session->session_id, &s->session->session_id_length,
2183 #ifndef OPENSSL_NO_SHA256
2184                                                         EVP_sha256(), NULL);
2185 #else
2186                                                         EVP_sha1(), NULL);
2187 #endif
2188         ret=1;
2189         return(ret);
2190 f_err:
2191         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2192 err:
2193         return(-1);
2194         }
2195
2196 int ssl3_get_cert_status(SSL *s)
2197         {
2198         int ok, al;
2199         unsigned long resplen,n;
2200         const unsigned char *p;
2201
2202         n=s->method->ssl_get_message(s,
2203                 SSL3_ST_CR_CERT_STATUS_A,
2204                 SSL3_ST_CR_CERT_STATUS_B,
2205                 SSL3_MT_CERTIFICATE_STATUS,
2206                 16384,
2207                 &ok);
2208
2209         if (!ok) return((int)n);
2210         if (n < 4)
2211                 {
2212                 /* need at least status type + length */
2213                 al = SSL_AD_DECODE_ERROR;
2214                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2215                 goto f_err;
2216                 }
2217         p = (unsigned char *)s->init_msg;
2218         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2219                 {
2220                 al = SSL_AD_DECODE_ERROR;
2221                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2222                 goto f_err;
2223                 }
2224         n2l3(p, resplen);
2225         if (resplen + 4 != n)
2226                 {
2227                 al = SSL_AD_DECODE_ERROR;
2228                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2229                 goto f_err;
2230                 }
2231         if (s->tlsext_ocsp_resp)
2232                 OPENSSL_free(s->tlsext_ocsp_resp);
2233         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2234         if (!s->tlsext_ocsp_resp)
2235                 {
2236                 al = SSL_AD_INTERNAL_ERROR;
2237                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2238                 goto f_err;
2239                 }
2240         s->tlsext_ocsp_resplen = resplen;
2241         if (s->ctx->tlsext_status_cb)
2242                 {
2243                 int ret;
2244                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2245                 if (ret == 0)
2246                         {
2247                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2248                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2249                         goto f_err;
2250                         }
2251                 if (ret < 0)
2252                         {
2253                         al = SSL_AD_INTERNAL_ERROR;
2254                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2255                         goto f_err;
2256                         }
2257                 }
2258         return 1;
2259 f_err:
2260         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2261         return(-1);
2262         }
2263 #endif
2264
2265 int ssl3_get_server_done(SSL *s)
2266         {
2267         int ok,ret=0;
2268         long n;
2269
2270         n=s->method->ssl_get_message(s,
2271                 SSL3_ST_CR_SRVR_DONE_A,
2272                 SSL3_ST_CR_SRVR_DONE_B,
2273                 SSL3_MT_SERVER_DONE,
2274                 30, /* should be very small, like 0 :-) */
2275                 &ok);
2276
2277         if (!ok) return((int)n);
2278         if (n > 0)
2279                 {
2280                 /* should contain no data */
2281                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2282                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2283                 return -1;
2284                 }
2285         ret=1;
2286         return(ret);
2287         }
2288
2289
2290 int ssl3_send_client_key_exchange(SSL *s)
2291         {
2292         unsigned char *p;
2293         int n;
2294         unsigned long alg_k;
2295 #ifndef OPENSSL_NO_RSA
2296         unsigned char *q;
2297         EVP_PKEY *pkey=NULL;
2298 #endif
2299 #ifndef OPENSSL_NO_KRB5
2300         KSSL_ERR kssl_err;
2301 #endif /* OPENSSL_NO_KRB5 */
2302 #ifndef OPENSSL_NO_ECDH
2303         EC_KEY *clnt_ecdh = NULL;
2304         const EC_POINT *srvr_ecpoint = NULL;
2305         EVP_PKEY *srvr_pub_pkey = NULL;
2306         unsigned char *encodedPoint = NULL;
2307         int encoded_pt_len = 0;
2308         BN_CTX * bn_ctx = NULL;
2309 #endif
2310
2311         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2312                 {
2313                 p = ssl_handshake_start(s);
2314
2315                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2316
2317                 /* Fool emacs indentation */
2318                 if (0) {}
2319 #ifndef OPENSSL_NO_RSA
2320                 else if (alg_k & SSL_kRSA)
2321                         {
2322                         RSA *rsa;
2323                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2324
2325                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2326                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2327                         else
2328                                 {
2329                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2330                                 if ((pkey == NULL) ||
2331                                         (pkey->type != EVP_PKEY_RSA) ||
2332                                         (pkey->pkey.rsa == NULL))
2333                                         {
2334                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2335                                         goto err;
2336                                         }
2337                                 rsa=pkey->pkey.rsa;
2338                                 EVP_PKEY_free(pkey);
2339                                 }
2340                                 
2341                         tmp_buf[0]=s->client_version>>8;
2342                         tmp_buf[1]=s->client_version&0xff;
2343                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2344                                         goto err;
2345
2346                         s->session->master_key_length=sizeof tmp_buf;
2347
2348                         q=p;
2349                         /* Fix buf for TLS and beyond */
2350                         if (s->version > SSL3_VERSION)
2351                                 p+=2;
2352                         n=RSA_public_encrypt(sizeof tmp_buf,
2353                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2354 #ifdef PKCS1_CHECK
2355                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2356                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2357 #endif
2358                         if (n <= 0)
2359                                 {
2360                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2361                                 goto err;
2362                                 }
2363
2364                         /* Fix buf for TLS and beyond */
2365                         if (s->version > SSL3_VERSION)
2366                                 {
2367                                 s2n(n,q);
2368                                 n+=2;
2369                                 }
2370
2371                         s->session->master_key_length=
2372                                 s->method->ssl3_enc->generate_master_secret(s,
2373                                         s->session->master_key,
2374                                         tmp_buf,sizeof tmp_buf);
2375                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2376                         }
2377 #endif
2378 #ifndef OPENSSL_NO_KRB5
2379                 else if (alg_k & SSL_kKRB5)
2380                         {
2381                         krb5_error_code krb5rc;
2382                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2383                         /*  krb5_data   krb5_ap_req;  */
2384                         krb5_data       *enc_ticket;
2385                         krb5_data       authenticator, *authp = NULL;
2386                         EVP_CIPHER_CTX  ciph_ctx;
2387                         const EVP_CIPHER *enc = NULL;
2388                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2389                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2390                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH 
2391                                                 + EVP_MAX_IV_LENGTH];
2392                         int             padl, outl = sizeof(epms);
2393
2394                         EVP_CIPHER_CTX_init(&ciph_ctx);
2395
2396 #ifdef KSSL_DEBUG
2397                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2398                                 alg_k, SSL_kKRB5);
2399 #endif  /* KSSL_DEBUG */
2400
2401                         authp = NULL;
2402 #ifdef KRB5SENDAUTH
2403                         if (KRB5SENDAUTH)  authp = &authenticator;
2404 #endif  /* KRB5SENDAUTH */
2405
2406                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2407                                 &kssl_err);
2408                         enc = kssl_map_enc(kssl_ctx->enctype);
2409                         if (enc == NULL)
2410                             goto err;
2411 #ifdef KSSL_DEBUG
2412                         {
2413                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2414                         if (krb5rc && kssl_err.text)
2415                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2416                         }
2417 #endif  /* KSSL_DEBUG */
2418
2419                         if (krb5rc)
2420                                 {
2421                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2422                                                 SSL_AD_HANDSHAKE_FAILURE);
2423                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2424                                                 kssl_err.reason);
2425                                 goto err;
2426                                 }
2427
2428                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2429                         **  in place of RFC 2712 KerberosWrapper, as in:
2430                         **
2431                         **  Send ticket (copy to *p, set n = length)
2432                         **  n = krb5_ap_req.length;
2433                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2434                         **  if (krb5_ap_req.data)  
2435                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2436                         **
2437                         **  Now using real RFC 2712 KerberosWrapper
2438                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2439                         **  Note: 2712 "opaque" types are here replaced
2440                         **  with a 2-byte length followed by the value.
2441                         **  Example:
2442                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2443                         **  Where "xx xx" = length bytes.  Shown here with
2444                         **  optional authenticator omitted.
2445                         */
2446
2447                         /*  KerberosWrapper.Ticket              */
2448                         s2n(enc_ticket->length,p);
2449                         memcpy(p, enc_ticket->data, enc_ticket->length);
2450                         p+= enc_ticket->length;
2451                         n = enc_ticket->length + 2;
2452
2453                         /*  KerberosWrapper.Authenticator       */
2454                         if (authp  &&  authp->length)  
2455                                 {
2456                                 s2n(authp->length,p);
2457                                 memcpy(p, authp->data, authp->length);
2458                                 p+= authp->length;
2459                                 n+= authp->length + 2;
2460                                 
2461                                 free(authp->data);
2462                                 authp->data = NULL;
2463                                 authp->length = 0;
2464                                 }
2465                         else
2466                                 {
2467                                 s2n(0,p);/*  null authenticator length  */
2468                                 n+=2;
2469                                 }
2470  
2471                             tmp_buf[0]=s->client_version>>8;
2472                             tmp_buf[1]=s->client_version&0xff;
2473                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2474                                 goto err;
2475
2476                         /*  20010420 VRS.  Tried it this way; failed.
2477                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2478                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2479                         **                              kssl_ctx->length);
2480                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2481                         */
2482
2483                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2484                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2485                                 kssl_ctx->key,iv);
2486                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2487                                 sizeof tmp_buf);
2488                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2489                         outl += padl;
2490                         if (outl > (int)sizeof epms)
2491                                 {
2492                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2493                                 goto err;
2494                                 }
2495                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2496
2497                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2498                         s2n(outl,p);
2499                         memcpy(p, epms, outl);
2500                         p+=outl;
2501                         n+=outl + 2;
2502
2503                         s->session->master_key_length=
2504                                 s->method->ssl3_enc->generate_master_secret(s,
2505                                         s->session->master_key,
2506                                         tmp_buf, sizeof tmp_buf);
2507
2508                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2509                         OPENSSL_cleanse(epms, outl);
2510                         }
2511 #endif
2512 #ifndef OPENSSL_NO_DH
2513                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2514                         {
2515                         DH *dh_srvr,*dh_clnt;
2516                         SESS_CERT *scert = s->session->sess_cert;
2517
2518                         if (scert == NULL) 
2519                                 {
2520                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2521                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2522                                 goto err;
2523                                 }
2524
2525                         if (scert->peer_dh_tmp != NULL)
2526                                 dh_srvr=scert->peer_dh_tmp;
2527                         else
2528                                 {
2529                                 /* we get them from the cert */
2530                                 int idx = scert->peer_cert_type;
2531                                 EVP_PKEY *spkey = NULL;
2532                                 dh_srvr = NULL;
2533                                 if (idx >= 0)
2534                                         spkey = X509_get_pubkey(
2535                                                 scert->peer_pkeys[idx].x509);
2536                                 if (spkey)
2537                                         {
2538                                         dh_srvr = EVP_PKEY_get1_DH(spkey);
2539                                         EVP_PKEY_free(spkey);
2540                                         }
2541                                 if (dh_srvr == NULL)
2542                                         {
2543                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2544                                             ERR_R_INTERNAL_ERROR);
2545                                         goto err;
2546                                         }
2547                                 }
2548                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2549                                 {
2550                                 /* Use client certificate key */
2551                                 EVP_PKEY *clkey = s->cert->key->privatekey;
2552                                 dh_clnt = NULL;
2553                                 if (clkey)
2554                                         dh_clnt = EVP_PKEY_get1_DH(clkey);
2555                                 if (dh_clnt == NULL)
2556                                         {
2557                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2558                                             ERR_R_INTERNAL_ERROR);
2559                                         goto err;
2560                                         }
2561                                 }
2562                         else
2563                                 {
2564                                 /* generate a new random key */
2565                                 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2566                                         {
2567                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2568                                         goto err;
2569                                         }
2570                                 if (!DH_generate_key(dh_clnt))
2571                                         {
2572                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2573                                         DH_free(dh_clnt);
2574                                         goto err;
2575                                         }
2576                                 }
2577
2578                         /* use the 'p' output buffer for the DH key, but
2579                          * make sure to clear it out afterwards */
2580
2581                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2582                         if (scert->peer_dh_tmp == NULL)
2583                                 DH_free(dh_srvr);
2584
2585                         if (n <= 0)
2586                                 {
2587                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2588                                 DH_free(dh_clnt);
2589                                 goto err;
2590                                 }
2591
2592                         /* generate master key from the result */
2593                         s->session->master_key_length=
2594                                 s->method->ssl3_enc->generate_master_secret(s,
2595                                         s->session->master_key,p,n);
2596                         /* clean up */
2597                         memset(p,0,n);
2598
2599                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2600                                 n = 0;
2601                         else
2602                                 {
2603                                 /* send off the data */
2604                                 n=BN_num_bytes(dh_clnt->pub_key);
2605                                 s2n(n,p);
2606                                 BN_bn2bin(dh_clnt->pub_key,p);
2607                                 n+=2;
2608                                 }
2609
2610                         DH_free(dh_clnt);
2611
2612                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2613                         }
2614 #endif
2615
2616 #ifndef OPENSSL_NO_ECDH 
2617                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2618                         {
2619                         const EC_GROUP *srvr_group = NULL;
2620                         EC_KEY *tkey;
2621                         int ecdh_clnt_cert = 0;
2622                         int field_size = 0;
2623
2624                         /* Did we send out the client's
2625                          * ECDH share for use in premaster
2626                          * computation as part of client certificate?
2627                          * If so, set ecdh_clnt_cert to 1.
2628                          */
2629                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 
2630                                 {
2631                                 /* XXX: For now, we do not support client
2632                                  * authentication using ECDH certificates.
2633                                  * To add such support, one needs to add
2634                                  * code that checks for appropriate 
2635                                  * conditions and sets ecdh_clnt_cert to 1.
2636                                  * For example, the cert have an ECC
2637                                  * key on the same curve as the server's
2638                                  * and the key should be authorized for
2639                                  * key agreement.
2640                                  *
2641                                  * One also needs to add code in ssl3_connect
2642                                  * to skip sending the certificate verify
2643                                  * message.
2644                                  *
2645                                  * if ((s->cert->key->privatekey != NULL) &&
2646                                  *     (s->cert->key->privatekey->type ==
2647                                  *      EVP_PKEY_EC) && ...)
2648                                  * ecdh_clnt_cert = 1;
2649                                  */
2650                                 }
2651
2652                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2653                                 {
2654                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2655                                 }
2656                         else
2657                                 {
2658                                 /* Get the Server Public Key from Cert */
2659                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2660                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2661                                 if ((srvr_pub_pkey == NULL) ||
2662                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2663                                     (srvr_pub_pkey->pkey.ec == NULL))
2664                                         {
2665                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2666                                             ERR_R_INTERNAL_ERROR);
2667                                         goto err;
2668                                         }
2669
2670                                 tkey = srvr_pub_pkey->pkey.ec;
2671                                 }
2672
2673                         srvr_group   = EC_KEY_get0_group(tkey);
2674                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2675
2676                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2677                                 {
2678                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2679                                     ERR_R_INTERNAL_ERROR);
2680                                 goto err;
2681                                 }
2682
2683                         if ((clnt_ecdh=EC_KEY_new()) == NULL) 
2684                                 {
2685                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2686                                 goto err;
2687                                 }
2688
2689                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2690                                 {
2691                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2692                                 goto err;
2693                                 }
2694                         if (ecdh_clnt_cert) 
2695                                 { 
2696                                 /* Reuse key info from our certificate
2697                                  * We only need our private key to perform
2698                                  * the ECDH computation.
2699                                  */
2700                                 const BIGNUM *priv_key;
2701                                 tkey = s->cert->key->privatekey->pkey.ec;
2702                                 priv_key = EC_KEY_get0_private_key(tkey);
2703                                 if (priv_key == NULL)
2704                                         {
2705                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2706                                         goto err;
2707                                         }
2708                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2709                                         {
2710                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2711                                         goto err;
2712                                         }
2713                                 }
2714                         else 
2715                                 {
2716                                 /* Generate a new ECDH key pair */
2717                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2718                                         {
2719                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2720                                         goto err;
2721                                         }
2722                                 }
2723
2724                         /* use the 'p' output buffer for the ECDH key, but
2725                          * make sure to clear it out afterwards
2726                          */
2727
2728                         field_size = EC_GROUP_get_degree(srvr_group);
2729                         if (field_size <= 0)
2730                                 {
2731                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2732                                        ERR_R_ECDH_LIB);
2733                                 goto err;
2734                                 }
2735                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2736                         if (n <= 0)
2737                                 {
2738                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
2739                                        ERR_R_ECDH_LIB);
2740                                 goto err;
2741                                 }
2742
2743                         /* generate master key from the result */
2744                         s->session->master_key_length = s->method->ssl3_enc \
2745                             -> generate_master_secret(s, 
2746                                 s->session->master_key,
2747                                 p, n);
2748
2749                         memset(p, 0, n); /* clean up */
2750
2751                         if (ecdh_clnt_cert) 
2752                                 {
2753                                 /* Send empty client key exch message */
2754                                 n = 0;
2755                                 }
2756                         else 
2757                                 {
2758                                 /* First check the size of encoding and
2759                                  * allocate memory accordingly.
2760                                  */
2761                                 encoded_pt_len = 
2762                                     EC_POINT_point2oct(srvr_group, 
2763                                         EC_KEY_get0_public_key(clnt_ecdh), 
2764                                         POINT_CONVERSION_UNCOMPRESSED, 
2765                                         NULL, 0, NULL);
2766
2767                                 encodedPoint = (unsigned char *) 
2768                                     OPENSSL_malloc(encoded_pt_len * 
2769                                         sizeof(unsigned char)); 
2770                                 bn_ctx = BN_CTX_new();
2771                                 if ((encodedPoint == NULL) || 
2772                                     (bn_ctx == NULL)) 
2773                                         {
2774                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2775                                         goto err;
2776                                         }
2777
2778                                 /* Encode the public key */
2779                                 n = EC_POINT_point2oct(srvr_group, 
2780                                     EC_KEY_get0_public_key(clnt_ecdh), 
2781                                     POINT_CONVERSION_UNCOMPRESSED, 
2782                                     encodedPoint, encoded_pt_len, bn_ctx);
2783
2784                                 *p = n; /* length of encoded point */
2785                                 /* Encoded point will be copied here */
2786                                 p += 1; 
2787                                 /* copy the point */
2788                                 memcpy((unsigned char *)p, encodedPoint, n);
2789                                 /* increment n to account for length field */
2790                                 n += 1; 
2791                                 }
2792
2793                         /* Free allocated memory */
2794                         BN_CTX_free(bn_ctx);
2795                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2796                         if (clnt_ecdh != NULL) 
2797                                  EC_KEY_free(clnt_ecdh);
2798                         EVP_PKEY_free(srvr_pub_pkey);
2799                         }
2800 #endif /* !OPENSSL_NO_ECDH */
2801                 else if (alg_k & SSL_kGOST) 
2802                         {
2803                         /* GOST key exchange message creation */
2804                         EVP_PKEY_CTX *pkey_ctx;
2805                         X509 *peer_cert; 
2806                         size_t msglen;
2807                         unsigned int md_len;
2808                         int keytype;
2809                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2810                         EVP_MD_CTX *ukm_hash;
2811                         EVP_PKEY *pub_key;
2812
2813                         /* Get server sertificate PKEY and create ctx from it */
2814                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2815                         if (!peer_cert) 
2816                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2817                         if (!peer_cert)         {
2818                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2819                                         goto err;
2820                                 }       
2821                                 
2822                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2823                         /* If we have send a certificate, and certificate key
2824
2825                          * parameters match those of server certificate, use
2826                          * certificate key for key exchange
2827                          */
2828
2829                          /* Otherwise, generate ephemeral key pair */
2830                                         
2831                         EVP_PKEY_encrypt_init(pkey_ctx);
2832                           /* Generate session key */    
2833                     RAND_bytes(premaster_secret,32);
2834                         /* If we have client certificate, use its secret as peer key */
2835                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2836                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2837                                         /* If there was an error - just ignore it. Ephemeral key
2838                                         * would be used
2839                                         */
2840                                         ERR_clear_error();
2841                                 }
2842                         }                       
2843                         /* Compute shared IV and store it in algorithm-specific
2844                          * context data */
2845                         ukm_hash = EVP_MD_CTX_create();
2846                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2847                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2848                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2849                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2850                         EVP_MD_CTX_destroy(ukm_hash);
2851                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2852                                 8,shared_ukm)<0) {
2853                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2854                                                 SSL_R_LIBRARY_BUG);
2855                                         goto err;
2856                                 }       
2857                         /* Make GOST keytransport blob message */
2858                         /*Encapsulate it into sequence */
2859                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2860                         msglen=255;
2861                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2862                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2863                                         SSL_R_LIBRARY_BUG);
2864                                 goto err;
2865                         }
2866                         if (msglen >= 0x80)
2867                                 {
2868                                 *(p++)=0x81;
2869                                 *(p++)= msglen & 0xff;
2870                                 n=msglen+3;
2871                                 }
2872                         else
2873                                 {
2874                                 *(p++)= msglen & 0xff;
2875                                 n=msglen+2;
2876                                 }
2877                         memcpy(p, tmp, msglen);
2878                         /* Check if pubkey from client certificate was used */
2879                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2880                                 {
2881                                 /* Set flag "skip certificate verify" */
2882                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2883                                 }
2884                         EVP_PKEY_CTX_free(pkey_ctx);
2885                         s->session->master_key_length=
2886                                 s->method->ssl3_enc->generate_master_secret(s,
2887                                         s->session->master_key,premaster_secret,32);
2888                         EVP_PKEY_free(pub_key);
2889
2890                         }
2891 #ifndef OPENSSL_NO_SRP
2892                 else if (alg_k & SSL_kSRP)
2893                         {
2894                         if (s->srp_ctx.A != NULL)
2895                                 {
2896                                 /* send off the data */
2897                                 n=BN_num_bytes(s->srp_ctx.A);
2898                                 s2n(n,p);
2899                                 BN_bn2bin(s->srp_ctx.A,p);
2900                                 n+=2;
2901                                 }
2902                         else
2903                                 {
2904                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2905                                 goto err;
2906                                 }
2907                         if (s->session->srp_username != NULL)
2908                                 OPENSSL_free(s->session->srp_username);
2909                         s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2910                         if (s->session->srp_username == NULL)
2911                                 {
2912                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2913                                         ERR_R_MALLOC_FAILURE);
2914                                 goto err;
2915                                 }
2916
2917                         if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2918                                 {
2919                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2920                                 goto err;
2921                                 }
2922                         }
2923 #endif
2924 #ifndef OPENSSL_NO_PSK
2925                 else if (alg_k & SSL_kPSK)
2926                         {
2927                         char identity[PSK_MAX_IDENTITY_LEN];
2928                         unsigned char *t = NULL;
2929                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2930                         unsigned int pre_ms_len = 0, psk_len = 0;
2931                         int psk_err = 1;
2932
2933                         n = 0;
2934                         if (s->psk_client_callback == NULL)
2935                                 {
2936                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2937                                         SSL_R_PSK_NO_CLIENT_CB);
2938                                 goto err;
2939                                 }
2940
2941                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2942                                 identity, PSK_MAX_IDENTITY_LEN,
2943                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2944                         if (psk_len > PSK_MAX_PSK_LEN)
2945                                 {
2946                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2947                                         ERR_R_INTERNAL_ERROR);
2948                                 goto psk_err;
2949                                 }
2950                         else if (psk_len == 0)
2951                                 {
2952                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2953                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2954                                 goto psk_err;
2955                                 }
2956
2957                         /* create PSK pre_master_secret */
2958                         pre_ms_len = 2+psk_len+2+psk_len;
2959                         t = psk_or_pre_ms;
2960                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2961                         s2n(psk_len, t);
2962                         memset(t, 0, psk_len);
2963                         t+=psk_len;
2964                         s2n(psk_len, t);
2965
2966                         if (s->session->psk_identity_hint != NULL)
2967                                 OPENSSL_free(s->session->psk_identity_hint);
2968                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2969                         if (s->ctx->psk_identity_hint != NULL &&
2970                                 s->session->psk_identity_hint == NULL)
2971                                 {
2972                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2973                                         ERR_R_MALLOC_FAILURE);
2974                                 goto psk_err;
2975                                 }
2976
2977                         if (s->session->psk_identity != NULL)
2978                                 OPENSSL_free(s->session->psk_identity);
2979                         s->session->psk_identity = BUF_strdup(identity);
2980                         if (s->session->psk_identity == NULL)
2981                                 {
2982                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2983                                         ERR_R_MALLOC_FAILURE);
2984                                 goto psk_err;
2985                                 }
2986
2987                         s->session->master_key_length =
2988                                 s->method->ssl3_enc->generate_master_secret(s,
2989                                         s->session->master_key,
2990                                         psk_or_pre_ms, pre_ms_len); 
2991                         n = strlen(identity);
2992                         s2n(n, p);
2993                         memcpy(p, identity, n);
2994                         n+=2;
2995                         psk_err = 0;
2996                 psk_err:
2997                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2998                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2999                         if (psk_err != 0)
3000                                 {
3001                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3002                                 goto err;
3003                                 }
3004                         }
3005 #endif
3006                 else
3007                         {
3008                         ssl3_send_alert(s, SSL3_AL_FATAL,
3009                             SSL_AD_HANDSHAKE_FAILURE);
3010                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3011                             ERR_R_INTERNAL_ERROR);
3012                         goto err;
3013                         }
3014
3015                 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3016                 s->state=SSL3_ST_CW_KEY_EXCH_B;
3017                 }
3018
3019         /* SSL3_ST_CW_KEY_EXCH_B */
3020         return ssl_do_write(s);
3021 err:
3022 #ifndef OPENSSL_NO_ECDH
3023         BN_CTX_fr