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[thirdparty/openssl.git] / ssl / s3_clnt.c
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d02b48c6 1/* ssl/s3_clnt.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE		 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 */
8c74b5e5 58/* ====================================================================
52b8dad8 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
8c74b5e5
BM		 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 */
ea262260
BM		 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 *
ea262260
BM		 120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
ddac1974
NL		 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 */
d02b48c6
RE		 150
151#include <stdio.h>
a3654f05 152#include <openssl/crypto.h>
7b63c0fa
LJ		 153#include "ssl_locl.h"
154#include "kssl_lcl.h"
ec577822
BM		 155#include <openssl/buffer.h>
156#include <openssl/rand.h>
157#include <openssl/objects.h>
158#include <openssl/evp.h>
dbad1690 159#include <openssl/md5.h>
086e32a6
DSH		 160#ifdef OPENSSL_FIPS
161#include <openssl/fips.h>
162#endif
3eeaab4b 163#ifndef OPENSSL_NO_DH
60a938c6 164#include <openssl/dh.h>
3eeaab4b 165#endif
d095b68d 166#include <openssl/bn.h>
368888bc
DSH		 167#ifndef OPENSSL_NO_ENGINE
168#include <openssl/engine.h>
169#endif
f9b3bff6 170
4ebb342f 171static const SSL_METHOD *ssl3_get_client_method(int ver);
ccd86b68 172static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
ea262260 173
4ebb342f 174static const SSL_METHOD *ssl3_get_client_method(int ver)
d02b48c6 175 {
58964a49 176 if (ver == SSL3_VERSION)
d02b48c6
RE		 177 return(SSLv3_client_method());
178 else
179 return(NULL);
180 }
181
f3b656b2
DSH		 182IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
183 ssl_undefined_function,
184 ssl3_connect,
185 ssl3_get_client_method)
d02b48c6 186
6b691a5c 187int ssl3_connect(SSL *s)
d02b48c6 188 {
8d6ad9e3 189 BUF_MEM *buf=NULL;
52b8dad8 190 unsigned long Time=(unsigned long)time(NULL);
45d87a1f 191 void (*cb)(const SSL *ssl,int type,int val)=NULL;
d02b48c6 192 int ret= -1;
477fd459 193 int new_state,state,skip=0;
d02b48c6 194
eb952088 195 RAND_add(&Time,sizeof(Time),0);
d02b48c6 196 ERR_clear_error();
58964a49 197 clear_sys_error();
d02b48c6
RE		 198
199 if (s->info_callback != NULL)
200 cb=s->info_callback;
201 else if (s->ctx->info_callback != NULL)
202 cb=s->ctx->info_callback;
203
d02b48c6 204 s->in_handshake++;
979689aa 205 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
d02b48c6
RE		 206
207 for (;;)
208 {
209 state=s->state;
210
211 switch(s->state)
212 {
213 case SSL_ST_RENEGOTIATE:
44959ee4 214 s->renegotiate=1;
d02b48c6 215 s->state=SSL_ST_CONNECT;
413c4f45 216 s->ctx->stats.sess_connect_renegotiate++;
d02b48c6
RE		 217 /* break */
218 case SSL_ST_BEFORE:
219 case SSL_ST_CONNECT:
220 case SSL_ST_BEFORE|SSL_ST_CONNECT:
221 case SSL_ST_OK|SSL_ST_CONNECT:
222
413c4f45 223 s->server=0;
d02b48c6
RE		 224 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
225
58964a49 226 if ((s->version & 0xff00 ) != 0x0300)
bbb8de09 227 {
5277d7cb 228 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
bbb8de09
BM		 229 ret = -1;
230 goto end;
231 }
232
58964a49 233 /* s->version=SSL3_VERSION; */
d02b48c6
RE		 234 s->type=SSL_ST_CONNECT;
235
236 if (s->init_buf == NULL)
237 {
238 if ((buf=BUF_MEM_new()) == NULL)
239 {
240 ret= -1;
241 goto end;
242 }
243 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
244 {
245 ret= -1;
246 goto end;
247 }
248 s->init_buf=buf;
8d6ad9e3 249 buf=NULL;
d02b48c6
RE		 250 }
251
252 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
253
254 /* setup buffing BIO */
58964a49 255 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
d02b48c6
RE		 256
257 /* don't push the buffering BIO quite yet */
258
259 ssl3_init_finished_mac(s);
260
261 s->state=SSL3_ST_CW_CLNT_HELLO_A;
413c4f45 262 s->ctx->stats.sess_connect++;
d02b48c6
RE		 263 s->init_num=0;
264 break;
265
266 case SSL3_ST_CW_CLNT_HELLO_A:
267 case SSL3_ST_CW_CLNT_HELLO_B:
268
269 s->shutdown=0;
270 ret=ssl3_client_hello(s);
271 if (ret <= 0) goto end;
272 s->state=SSL3_ST_CR_SRVR_HELLO_A;
273 s->init_num=0;
274
275 /* turn on buffering for the next lot of output */
58964a49
RE		 276 if (s->bbio != s->wbio)
277 s->wbio=BIO_push(s->bbio,s->wbio);
d02b48c6
RE		 278
279 break;
280
281 case SSL3_ST_CR_SRVR_HELLO_A:
282 case SSL3_ST_CR_SRVR_HELLO_B:
283 ret=ssl3_get_server_hello(s);
edc032b5
BL		 284#ifndef OPENSSL_NO_SRP
285 if ((ret == 0) && (s->s3->warn_alert == SSL_AD_MISSING_SRP_USERNAME))
286 {
287 if (!SRP_have_to_put_srp_username(s))
288 {
23bc7961 289 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_MISSING_SRP_USERNAME);
edc032b5
BL		 290 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_USER_CANCELLED);
291 goto end;
292 }
293 s->state=SSL3_ST_CW_CLNT_HELLO_A;
294 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
295 break;
296 }
297#endif
d02b48c6 298 if (ret <= 0) goto end;
241520e6 299
d02b48c6
RE		 300 if (s->hit)
301 s->state=SSL3_ST_CR_FINISHED_A;
302 else
303 s->state=SSL3_ST_CR_CERT_A;
304 s->init_num=0;
305 break;
306
307 case SSL3_ST_CR_CERT_A:
308 case SSL3_ST_CR_CERT_B:
6434abbf
DSH		 309#ifndef OPENSSL_NO_TLSEXT
310 ret=ssl3_check_finished(s);
311 if (ret <= 0) goto end;
312 if (ret == 2)
313 {
314 s->hit = 1;
31f528b1
DSH		 315 if (s->tlsext_ticket_expected)
316 s->state=SSL3_ST_CR_SESSION_TICKET_A;
317 else
318 s->state=SSL3_ST_CR_FINISHED_A;
6434abbf
DSH		 319 s->init_num=0;
320 break;
321 }
322#endif
ea262260 323 /* Check if it is anon DH/ECDH */
ddac1974 324 /* or PSK */
52b8dad8
BM		 325 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
326 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
d02b48c6
RE		 327 {
328 ret=ssl3_get_server_certificate(s);
329 if (ret <= 0) goto end;
67c8e7f4
DSH		 330#ifndef OPENSSL_NO_TLSEXT
331 if (s->tlsext_status_expected)
332 s->state=SSL3_ST_CR_CERT_STATUS_A;
333 else
334 s->state=SSL3_ST_CR_KEY_EXCH_A;
335 }
336 else
337 {
338 skip = 1;
339 s->state=SSL3_ST_CR_KEY_EXCH_A;
d02b48c6 340 }
67c8e7f4 341#else
3ce54f35 342 }
d02b48c6
RE		 343 else
344 skip=1;
67c8e7f4 345
d02b48c6 346 s->state=SSL3_ST_CR_KEY_EXCH_A;
67c8e7f4 347#endif
d02b48c6
RE		 348 s->init_num=0;
349 break;
350
351 case SSL3_ST_CR_KEY_EXCH_A:
352 case SSL3_ST_CR_KEY_EXCH_B:
353 ret=ssl3_get_key_exchange(s);
354 if (ret <= 0) goto end;
355 s->state=SSL3_ST_CR_CERT_REQ_A;
356 s->init_num=0;
357
358 /* at this point we check that we have the
359 * required stuff from the server */
360 if (!ssl3_check_cert_and_algorithm(s))
361 {
362 ret= -1;
363 goto end;
364 }
365 break;
366
367 case SSL3_ST_CR_CERT_REQ_A:
368 case SSL3_ST_CR_CERT_REQ_B:
369 ret=ssl3_get_certificate_request(s);
370 if (ret <= 0) goto end;
371 s->state=SSL3_ST_CR_SRVR_DONE_A;
372 s->init_num=0;
373 break;
374
375 case SSL3_ST_CR_SRVR_DONE_A:
376 case SSL3_ST_CR_SRVR_DONE_B:
377 ret=ssl3_get_server_done(s);
378 if (ret <= 0) goto end;
edc032b5
BL		 379#ifndef OPENSSL_NO_SRP
380 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
381 {
382 if ((ret = SRP_Calc_A_param(s))<=0)
383 {
23bc7961 384 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
edc032b5
BL		 385 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
386 goto end;
387 }
388 }
389#endif
d02b48c6
RE		 390 if (s->s3->tmp.cert_req)
391 s->state=SSL3_ST_CW_CERT_A;
392 else
393 s->state=SSL3_ST_CW_KEY_EXCH_A;
394 s->init_num=0;
395
396 break;
397
398 case SSL3_ST_CW_CERT_A:
399 case SSL3_ST_CW_CERT_B:
400 case SSL3_ST_CW_CERT_C:
95d29597 401 case SSL3_ST_CW_CERT_D:
d02b48c6
RE		 402 ret=ssl3_send_client_certificate(s);
403 if (ret <= 0) goto end;
404 s->state=SSL3_ST_CW_KEY_EXCH_A;
405 s->init_num=0;
406 break;
407
408 case SSL3_ST_CW_KEY_EXCH_A:
409 case SSL3_ST_CW_KEY_EXCH_B:
410 ret=ssl3_send_client_key_exchange(s);
411 if (ret <= 0) goto end;
d02b48c6
RE		 412 /* EAY EAY EAY need to check for DH fix cert
413 * sent back */
58964a49
RE		 414 /* For TLS, cert_req is set to 2, so a cert chain
415 * of nothing is sent, but no verify packet is sent */
ea262260
BM		 416 /* XXX: For now, we do not support client
417 * authentication in ECDH cipher suites with
418 * ECDH (rather than ECDSA) certificates.
419 * We need to skip the certificate verify
420 * message when client's ECDH public key is sent
421 * inside the client certificate.
422 */
58964a49 423 if (s->s3->tmp.cert_req == 1)
d02b48c6
RE		 424 {
425 s->state=SSL3_ST_CW_CERT_VRFY_A;
426 }
427 else
428 {
429 s->state=SSL3_ST_CW_CHANGE_A;
430 s->s3->change_cipher_spec=0;
431 }
f0288f05
DSH		 432 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
433 {
434 s->state=SSL3_ST_CW_CHANGE_A;
435 s->s3->change_cipher_spec=0;
436 }
d02b48c6
RE		 437
438 s->init_num=0;
439 break;
440
441 case SSL3_ST_CW_CERT_VRFY_A:
442 case SSL3_ST_CW_CERT_VRFY_B:
443 ret=ssl3_send_client_verify(s);
444 if (ret <= 0) goto end;
445 s->state=SSL3_ST_CW_CHANGE_A;
446 s->init_num=0;
447 s->s3->change_cipher_spec=0;
448 break;
449
450 case SSL3_ST_CW_CHANGE_A:
451 case SSL3_ST_CW_CHANGE_B:
452 ret=ssl3_send_change_cipher_spec(s,
453 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
454 if (ret <= 0) goto end;
ee2ffc27 455
bf48836c 456#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
d02b48c6 457 s->state=SSL3_ST_CW_FINISHED_A;
ee2ffc27
BL		 458#else
459 if (s->next_proto_negotiated)
460 s->state=SSL3_ST_CW_NEXT_PROTO_A;
461 else
462 s->state=SSL3_ST_CW_FINISHED_A;
463#endif
d02b48c6
RE		 464 s->init_num=0;
465
466 s->session->cipher=s->s3->tmp.new_cipher;
09b6c2ef
DSH		 467#ifdef OPENSSL_NO_COMP
468 s->session->compress_meth=0;
469#else
413c4f45
MC		 470 if (s->s3->tmp.new_compression == NULL)
471 s->session->compress_meth=0;
472 else
473 s->session->compress_meth=
474 s->s3->tmp.new_compression->id;
09b6c2ef 475#endif
58964a49 476 if (!s->method->ssl3_enc->setup_key_block(s))
d02b48c6
RE		 477 {
478 ret= -1;
479 goto end;
480 }
481
58964a49 482 if (!s->method->ssl3_enc->change_cipher_state(s,
d02b48c6
RE		 483 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
484 {
485 ret= -1;
486 goto end;
487 }
488
489 break;
490
bf48836c 491#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
ee2ffc27
BL		 492 case SSL3_ST_CW_NEXT_PROTO_A:
493 case SSL3_ST_CW_NEXT_PROTO_B:
494 ret=ssl3_send_next_proto(s);
495 if (ret <= 0) goto end;
496 s->state=SSL3_ST_CW_FINISHED_A;
497 break;
498#endif
499
d02b48c6
RE		 500 case SSL3_ST_CW_FINISHED_A:
501 case SSL3_ST_CW_FINISHED_B:
502 ret=ssl3_send_finished(s,
503 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
c44f7540
BM		 504 s->method->ssl3_enc->client_finished_label,
505 s->method->ssl3_enc->client_finished_label_len);
d02b48c6
RE		 506 if (ret <= 0) goto end;
507 s->state=SSL3_ST_CW_FLUSH;
508
509 /* clear flags */
510 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
511 if (s->hit)
512 {
513 s->s3->tmp.next_state=SSL_ST_OK;
514 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
515 {
516 s->state=SSL_ST_OK;
517 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
518 s->s3->delay_buf_pop_ret=0;
519 }
520 }
521 else
522 {
6434abbf
DSH		 523#ifndef OPENSSL_NO_TLSEXT
524 /* Allow NewSessionTicket if ticket expected */
525 if (s->tlsext_ticket_expected)
526 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
527 else
528#endif
529
d02b48c6
RE		 530 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
531 }
532 s->init_num=0;
533 break;
534
6434abbf
DSH		 535#ifndef OPENSSL_NO_TLSEXT
536 case SSL3_ST_CR_SESSION_TICKET_A:
537 case SSL3_ST_CR_SESSION_TICKET_B:
538 ret=ssl3_get_new_session_ticket(s);
446124a2 539 if (ret <= 0) goto end;
6434abbf
DSH		 540 s->state=SSL3_ST_CR_FINISHED_A;
541 s->init_num=0;
542 break;
67c8e7f4
DSH		 543
544 case SSL3_ST_CR_CERT_STATUS_A:
545 case SSL3_ST_CR_CERT_STATUS_B:
546 ret=ssl3_get_cert_status(s);
547 if (ret <= 0) goto end;
548 s->state=SSL3_ST_CR_KEY_EXCH_A;
549 s->init_num=0;
550 break;
6434abbf
DSH		 551#endif
552
d02b48c6
RE		 553 case SSL3_ST_CR_FINISHED_A:
554 case SSL3_ST_CR_FINISHED_B:
555
556 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
58964a49 557 SSL3_ST_CR_FINISHED_B);
d02b48c6
RE		 558 if (ret <= 0) goto end;
559
560 if (s->hit)
561 s->state=SSL3_ST_CW_CHANGE_A;
562 else
563 s->state=SSL_ST_OK;
564 s->init_num=0;
565 break;
566
567 case SSL3_ST_CW_FLUSH:
d5e7f2f2
DSH		 568 s->rwstate=SSL_WRITING;
569 if (BIO_flush(s->wbio) <= 0)
d02b48c6 570 {
d5e7f2f2
DSH		 571 ret= -1;
572 goto end;
d02b48c6 573 }
d5e7f2f2 574 s->rwstate=SSL_NOTHING;
d02b48c6
RE		 575 s->state=s->s3->tmp.next_state;
576 break;
577
578 case SSL_ST_OK:
579 /* clean a few things up */
580 ssl3_cleanup_key_block(s);
581
413c4f45 582 if (s->init_buf != NULL)
d02b48c6 583 {
413c4f45
MC		 584 BUF_MEM_free(s->init_buf);
585 s->init_buf=NULL;
d02b48c6 586 }
413c4f45
MC		 587
588 /* If we are not 'joining' the last two packets,
589 * remove the buffering now */
590 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
591 ssl_free_wbio_buffer(s);
592 /* else do it later in ssl3_write */
d02b48c6
RE		 593
594 s->init_num=0;
44959ee4 595 s->renegotiate=0;
d02b48c6
RE		 596 s->new_session=0;
597
598 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
413c4f45 599 if (s->hit) s->ctx->stats.sess_hit++;
d02b48c6
RE		 600
601 ret=1;
602 /* s->server=0; */
603 s->handshake_func=ssl3_connect;
413c4f45 604 s->ctx->stats.sess_connect_good++;
d02b48c6
RE		 605
606 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
607
608 goto end;
dfeab068 609 /* break; */
d02b48c6
RE		 610
611 default:
612 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
613 ret= -1;
614 goto end;
615 /* break; */
616 }
617
618 /* did we do anything */
619 if (!s->s3->tmp.reuse_message && !skip)
620 {
58964a49
RE		 621 if (s->debug)
622 {
623 if ((ret=BIO_flush(s->wbio)) <= 0)
624 goto end;
625 }
d02b48c6
RE		 626
627 if ((cb != NULL) && (s->state != state))
628 {
629 new_state=s->state;
630 s->state=state;
631 cb(s,SSL_CB_CONNECT_LOOP,1);
632 s->state=new_state;
633 }
634 }
635 skip=0;
636 }
637end:
4d635a70 638 s->in_handshake--;
8d6ad9e3
RL		 639 if (buf != NULL)
640 BUF_MEM_free(buf);
d02b48c6
RE		 641 if (cb != NULL)
642 cb(s,SSL_CB_CONNECT_EXIT,ret);
d02b48c6
RE		 643 return(ret);
644 }
645
646
36d16f8e 647int ssl3_client_hello(SSL *s)
d02b48c6
RE		 648 {
649 unsigned char *buf;
650 unsigned char *p,*d;
09b6c2ef 651 int i;
d02b48c6 652 unsigned long Time,l;
09b6c2ef
DSH		 653#ifndef OPENSSL_NO_COMP
654 int j;
413c4f45 655 SSL_COMP *comp;
09b6c2ef 656#endif
d02b48c6
RE		 657
658 buf=(unsigned char *)s->init_buf->data;
659 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
660 {
213f08a6
DSH		 661 SSL_SESSION *sess = s->session;
662 if ((sess == NULL) ||
663 (sess->ssl_version != s->version) ||
664#ifdef OPENSSL_NO_TLSEXT
665 !sess->session_id_length ||
666#else
667 (!sess->session_id_length && !sess->tlsext_tick) ||
668#endif
669 (sess->not_resumable))
d02b48c6
RE		 670 {
671 if (!ssl_get_new_session(s,0))
672 goto err;
673 }
674 /* else use the pre-loaded session */
675
676 p=s->s3->client_random;
7bbcb2f6 677 Time=(unsigned long)time(NULL); /* Time */
d02b48c6 678 l2n(Time,p);
7c7667b8
NL		 679 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
680 goto err;
d02b48c6
RE		 681
682 /* Do the message type and length last */
683 d=p= &(buf[4]);
684
58964a49
RE		 685 *(p++)=s->version>>8;
686 *(p++)=s->version&0xff;
413c4f45 687 s->client_version=s->version;
d02b48c6
RE		 688
689 /* Random stuff */
690 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
691 p+=SSL3_RANDOM_SIZE;
692
693 /* Session ID */
694 if (s->new_session)
695 i=0;
696 else
697 i=s->session->session_id_length;
698 *(p++)=i;
699 if (i != 0)
700 {
27545970 701 if (i > (int)sizeof(s->session->session_id))
5574e0ed
BM		 702 {
703 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
704 goto err;
705 }
d02b48c6
RE		 706 memcpy(p,s->session->session_id,i);
707 p+=i;
708 }
709
710 /* Ciphers supported */
c6c2e313 711 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
d02b48c6
RE		 712 if (i == 0)
713 {
714 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
715 goto err;
716 }
717 s2n(i,p);
718 p+=i;
719
dfeab068 720 /* COMPRESSION */
09b6c2ef
DSH		 721#ifdef OPENSSL_NO_COMP
722 *(p++)=1;
723#else
566dda07
DSH		 724
725 if ((s->options & SSL_OP_NO_COMPRESSION)
726 || !s->ctx->comp_methods)
413c4f45
MC		 727 j=0;
728 else
f73e07cf 729 j=sk_SSL_COMP_num(s->ctx->comp_methods);
413c4f45
MC		 730 *(p++)=1+j;
731 for (i=0; i<j; i++)
732 {
f73e07cf 733 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
413c4f45
MC		 734 *(p++)=comp->id;
735 }
09b6c2ef 736#endif
413c4f45 737 *(p++)=0; /* Add the NULL method */
761772d7 738
ed3883d2 739#ifndef OPENSSL_NO_TLSEXT
761772d7 740 /* TLS extensions*/
36ca4ba6
BM		 741 if (ssl_prepare_clienthello_tlsext(s) <= 0)
742 {
743 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
744 goto err;
745 }
f1fd4544
BM		 746 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
747 {
ed3883d2
BM		 748 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
749 goto err;
f1fd4544 750 }
ed3883d2 751#endif
d02b48c6
RE		 752
753 l=(p-d);
754 d=buf;
755 *(d++)=SSL3_MT_CLIENT_HELLO;
756 l2n3(l,d);
757
758 s->state=SSL3_ST_CW_CLNT_HELLO_B;
759 /* number of bytes to write */
760 s->init_num=p-buf;
761 s->init_off=0;
762 }
763
764 /* SSL3_ST_CW_CLNT_HELLO_B */
765 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
766err:
767 return(-1);
768 }
769
36d16f8e 770int ssl3_get_server_hello(SSL *s)
d02b48c6 771 {
f73e07cf 772 STACK_OF(SSL_CIPHER) *sk;
babb3798 773 const SSL_CIPHER *c;
d02b48c6
RE		 774 unsigned char *p,*d;
775 int i,al,ok;
776 unsigned int j;
777 long n;
09b6c2ef 778#ifndef OPENSSL_NO_COMP
413c4f45 779 SSL_COMP *comp;
09b6c2ef 780#endif
d02b48c6 781
36d16f8e 782 n=s->method->ssl_get_message(s,
d02b48c6
RE		 783 SSL3_ST_CR_SRVR_HELLO_A,
784 SSL3_ST_CR_SRVR_HELLO_B,
36d16f8e 785 -1,
6434abbf 786 20000, /* ?? */
d02b48c6
RE		 787 &ok);
788
789 if (!ok) return((int)n);
36d16f8e 790
8711efb4 791 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
36d16f8e
BL		 792 {
793 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
794 {
795 if ( s->d1->send_cookie == 0)
796 {
797 s->s3->tmp.reuse_message = 1;
798 return 1;
799 }
800 else /* already sent a cookie */
801 {
802 al=SSL_AD_UNEXPECTED_MESSAGE;
aa4ce731 803 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
36d16f8e
BL		 804 goto f_err;
805 }
806 }
807 }
808
809 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
810 {
811 al=SSL_AD_UNEXPECTED_MESSAGE;
aa4ce731 812 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
36d16f8e
BL		 813 goto f_err;
814 }
815
48948d53 816 d=p=(unsigned char *)s->init_msg;
d02b48c6 817
58964a49 818 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
d02b48c6
RE		 819 {
820 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
58964a49
RE		 821 s->version=(s->version&0xff00)|p[1];
822 al=SSL_AD_PROTOCOL_VERSION;
823 goto f_err;
d02b48c6
RE		 824 }
825 p+=2;
826
827 /* load the server hello data */
828 /* load the server random */
829 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
830 p+=SSL3_RANDOM_SIZE;
831
832 /* get the session-id */
833 j= *(p++);
834
a4f53a1c 835 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
d02b48c6 836 {
a4f53a1c
BM		 837 al=SSL_AD_ILLEGAL_PARAMETER;
838 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
839 goto f_err;
d02b48c6 840 }
54a656ef 841
12bf56c0
DSH		 842#ifndef OPENSSL_NO_TLSEXT
843 /* check if we want to resume the session based on external pre-shared secret */
844 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
845 {
846 SSL_CIPHER *pref_cipher=NULL;
847 s->session->master_key_length=sizeof(s->session->master_key);
848 if (s->tls_session_secret_cb(s, s->session->master_key,
849 &s->session->master_key_length,
850 NULL, &pref_cipher,
851 s->tls_session_secret_cb_arg))
852 {
853 s->session->cipher = pref_cipher ?
854 pref_cipher : ssl_get_cipher_by_char(s, p+j);
855 }
856 }
857#endif /* OPENSSL_NO_TLSEXT */
858
b4cadc6e
BL		 859 if (j != 0 && j == s->session->session_id_length
860 && memcmp(p,s->session->session_id,j) == 0)
861 {
862 if(s->sid_ctx_length != s->session->sid_ctx_length
863 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
864 {
a4f53a1c 865 /* actually a client application bug */
b4cadc6e
BL		 866 al=SSL_AD_ILLEGAL_PARAMETER;
867 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
868 goto f_err;
869 }
870 s->hit=1;
871 }
58964a49 872 else /* a miss or crap from the other end */
d02b48c6 873 {
58964a49
RE		 874 /* If we were trying for session-id reuse, make a new
875 * SSL_SESSION so we don't stuff up other people */
d02b48c6 876 s->hit=0;
58964a49
RE		 877 if (s->session->session_id_length > 0)
878 {
879 if (!ssl_get_new_session(s,0))
880 {
881 al=SSL_AD_INTERNAL_ERROR;
882 goto f_err;
883 }
884 }
885 s->session->session_id_length=j;
886 memcpy(s->session->session_id,p,j); /* j could be 0 */
d02b48c6
RE		 887 }
888 p+=j;
889 c=ssl_get_cipher_by_char(s,p);
890 if (c == NULL)
891 {
892 /* unknown cipher */
58964a49 893 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 894 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
895 goto f_err;
896 }
897 p+=ssl_put_cipher_by_char(s,NULL,NULL);
898
899 sk=ssl_get_ciphers_by_id(s);
f73e07cf 900 i=sk_SSL_CIPHER_find(sk,c);
d02b48c6
RE		 901 if (i < 0)
902 {
903 /* we did not say we would use this cipher */
58964a49 904 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 905 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
906 goto f_err;
907 }
908
6a8afe22
LJ		 909 /* Depending on the session caching (internal/external), the cipher
910 and/or cipher_id values may not be set. Make sure that
911 cipher_id is set and use it for comparison. */
912 if (s->session->cipher)
913 s->session->cipher_id = s->session->cipher->id;
c5662053 914 if (s->hit && (s->session->cipher_id != c->id))
d02b48c6 915 {
88f2a4cf
BM		 916/* Workaround is now obsolete */
917#if 0
58964a49 918 if (!(s->options &
d02b48c6 919 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
88f2a4cf 920#endif
d02b48c6 921 {
58964a49 922 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 923 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
924 goto f_err;
925 }
926 }
927 s->s3->tmp.new_cipher=c;
855a54a9
DSH		 928 /* Don't digest cached records if TLS v1.2: we may need them for
929 * client authentication.
930 */
238b6361 931 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
6ba71a71 932 goto f_err;
d02b48c6 933 /* lets get the compression algorithm */
dfeab068 934 /* COMPRESSION */
09b6c2ef
DSH		 935#ifdef OPENSSL_NO_COMP
936 if (*(p++) != 0)
937 {
938 al=SSL_AD_ILLEGAL_PARAMETER;
939 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
940 goto f_err;
941 }
2be3d6eb
DSH		 942 /* If compression is disabled we'd better not try to resume a session
943 * using compression.
944 */
945 if (s->session->compress_meth != 0)
946 {
947 al=SSL_AD_INTERNAL_ERROR;
948 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
949 goto f_err;
950 }
09b6c2ef 951#else
d02b48c6 952 j= *(p++);
dd792d62 953 if (s->hit && j != s->session->compress_meth)
2be3d6eb
DSH		 954 {
955 al=SSL_AD_ILLEGAL_PARAMETER;
956 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
957 goto f_err;
958 }
959 if (j == 0)
413c4f45 960 comp=NULL;
2be3d6eb
DSH		 961 else if (s->options & SSL_OP_NO_COMPRESSION)
962 {
963 al=SSL_AD_ILLEGAL_PARAMETER;
964 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
965 goto f_err;
966 }
413c4f45
MC		 967 else
968 comp=ssl3_comp_find(s->ctx->comp_methods,j);
969
970 if ((j != 0) && (comp == NULL))
d02b48c6 971 {
58964a49 972 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
974 goto f_err;
975 }
413c4f45
MC		 976 else
977 {
978 s->s3->tmp.new_compression=comp;
979 }
09b6c2ef 980#endif
761772d7 981
ed3883d2
BM		 982#ifndef OPENSSL_NO_TLSEXT
983 /* TLS extensions*/
13f6d57b 984 if (s->version >= SSL3_VERSION)
f1fd4544
BM		 985 {
986 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
987 {
988 /* 'al' set by ssl_parse_serverhello_tlsext */
36ca4ba6 989 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
ed3883d2 990 goto f_err;
f1fd4544 991 }
36ca4ba6 992 if (ssl_check_serverhello_tlsext(s) <= 0)
58ece833 993 {
a291745e 994 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
58ece833
BM		 995 goto err;
996 }
ed3883d2 997 }
ed3883d2 998#endif
d02b48c6
RE		 999
1000 if (p != (d+n))
1001 {
1002 /* wrong packet length */
58964a49 1003 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1004 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1005 goto err;
1006 }
1007
1008 return(1);
1009f_err:
1010 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1011err:
1012 return(-1);
1013 }
1014
36d16f8e 1015int ssl3_get_server_certificate(SSL *s)
d02b48c6
RE		 1016 {
1017 int al,i,ok,ret= -1;
1018 unsigned long n,nc,llen,l;
1019 X509 *x=NULL;
875a644a
RL		 1020 const unsigned char *q,*p;
1021 unsigned char *d;
f73e07cf 1022 STACK_OF(X509) *sk=NULL;
b56bce4f 1023 SESS_CERT *sc;
d02b48c6 1024 EVP_PKEY *pkey=NULL;
57376542 1025 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
d02b48c6 1026
36d16f8e 1027 n=s->method->ssl_get_message(s,
d02b48c6
RE		 1028 SSL3_ST_CR_CERT_A,
1029 SSL3_ST_CR_CERT_B,
1030 -1,
c0f5dd07 1031 s->max_cert_list,
d02b48c6
RE		 1032 &ok);
1033
1034 if (!ok) return((int)n);
1035
c1ca9d32 1036 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
2b13f803 1037 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
c1ca9d32 1038 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
d02b48c6
RE		 1039 {
1040 s->s3->tmp.reuse_message=1;
1041 return(1);
1042 }
1043
1044 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1045 {
58964a49 1046 al=SSL_AD_UNEXPECTED_MESSAGE;
d02b48c6
RE		 1047 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1048 goto f_err;
1049 }
875a644a 1050 p=d=(unsigned char *)s->init_msg;
d02b48c6 1051
f73e07cf 1052 if ((sk=sk_X509_new_null()) == NULL)
d02b48c6
RE		 1053 {
1054 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1055 goto err;
1056 }
1057
1058 n2l3(p,llen);
1059 if (llen+3 != n)
1060 {
58964a49 1061 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1062 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1063 goto f_err;
1064 }
1065 for (nc=0; nc<llen; )
1066 {
1067 n2l3(p,l);
1068 if ((l+nc+3) > llen)
1069 {
58964a49 1070 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1071 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1072 goto f_err;
1073 }
1074
1075 q=p;
1076 x=d2i_X509(NULL,&q,l);
1077 if (x == NULL)
1078 {
58964a49 1079 al=SSL_AD_BAD_CERTIFICATE;
d02b48c6
RE		 1080 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1081 goto f_err;
1082 }
1083 if (q != (p+l))
1084 {
58964a49 1085 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1086 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1087 goto f_err;
1088 }
f73e07cf 1089 if (!sk_X509_push(sk,x))
d02b48c6
RE		 1090 {
1091 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1092 goto err;
1093 }
1094 x=NULL;
1095 nc+=l+3;
1096 p=q;
1097 }
1098
1099 i=ssl_verify_cert_chain(s,sk);
bab53405 1100 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
82d5d46c 1101#ifndef OPENSSL_NO_KRB5
52b8dad8
BM		 1102 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1103 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
82d5d46c 1104#endif /* OPENSSL_NO_KRB5 */
52b8dad8 1105 )
d02b48c6
RE		 1106 {
1107 al=ssl_verify_alarm_type(s->verify_result);
1108 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1109 goto f_err;
1110 }
1fab73ac 1111 ERR_clear_error(); /* but we keep s->verify_result */
d02b48c6 1112
b56bce4f
BM		 1113 sc=ssl_sess_cert_new();
1114 if (sc == NULL) goto err;
d02b48c6 1115
b56bce4f
BM		 1116 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1117 s->session->sess_cert=sc;
d02b48c6 1118
b56bce4f 1119 sc->cert_chain=sk;
98e04f9e
BM		 1120 /* Inconsistency alert: cert_chain does include the peer's
1121 * certificate, which we don't include in s3_srvr.c */
f73e07cf 1122 x=sk_X509_value(sk,0);
d02b48c6 1123 sk=NULL;
2a1ef754 1124 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
d02b48c6
RE		 1125
1126 pkey=X509_get_pubkey(x);
1127
57376542 1128 /* VRS: allow null cert if auth == KRB5 */
52b8dad8
BM		 1129 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1130 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1131 ? 0 : 1;
f9b3bff6
RL		 1132
1133#ifdef KSSL_DEBUG
6343829a 1134 printf("pkey,x = %p, %p\n", pkey,x);
f9b3bff6 1135 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
52b8dad8
BM		 1136 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1137 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
f9b3bff6
RL		 1138#endif /* KSSL_DEBUG */
1139
2a1ef754 1140 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
d02b48c6
RE		 1141 {
1142 x=NULL;
1143 al=SSL3_AL_FATAL;
2a1ef754
RL		 1144 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1145 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
d02b48c6
RE		 1146 goto f_err;
1147 }
1148
1149 i=ssl_cert_type(x,pkey);
f9b3bff6 1150 if (need_cert && i < 0)
d02b48c6
RE		 1151 {
1152 x=NULL;
1153 al=SSL3_AL_FATAL;
2a1ef754
RL		 1154 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1155 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
d02b48c6
RE		 1156 goto f_err;
1157 }
1158
57376542
BM		 1159 if (need_cert)
1160 {
1161 sc->peer_cert_type=i;
1162 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1163 /* Why would the following ever happen?
1164 * We just created sc a couple of lines ago. */
1165 if (sc->peer_pkeys[i].x509 != NULL)
1166 X509_free(sc->peer_pkeys[i].x509);
1167 sc->peer_pkeys[i].x509=x;
1168 sc->peer_key= &(sc->peer_pkeys[i]);
1169
1170 if (s->session->peer != NULL)
1171 X509_free(s->session->peer);
1172 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1173 s->session->peer=x;
1174 }
1175 else
1176 {
1177 sc->peer_cert_type=i;
1178 sc->peer_key= NULL;
1179
1180 if (s->session->peer != NULL)
1181 X509_free(s->session->peer);
1182 s->session->peer=NULL;
1183 }
0dd2254d 1184 s->session->verify_result = s->verify_result;
d02b48c6
RE		 1185
1186 x=NULL;
1187 ret=1;
1188
1189 if (0)
1190 {
1191f_err:
1192 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1193 }
1194err:
a8236c8c
DSH		 1195 EVP_PKEY_free(pkey);
1196 X509_free(x);
f73e07cf 1197 sk_X509_pop_free(sk,X509_free);
d02b48c6
RE		 1198 return(ret);
1199 }
1200
36d16f8e 1201int ssl3_get_key_exchange(SSL *s)
d02b48c6 1202 {
bc36ee62 1203#ifndef OPENSSL_NO_RSA
d02b48c6
RE		 1204 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1205#endif
1206 EVP_MD_CTX md_ctx;
1207 unsigned char *param,*p;
1208 int al,i,j,param_len,ok;
52b8dad8 1209 long n,alg_k,alg_a;
d02b48c6 1210 EVP_PKEY *pkey=NULL;
a2f9200f 1211 const EVP_MD *md = NULL;
bc36ee62 1212#ifndef OPENSSL_NO_RSA
d02b48c6 1213 RSA *rsa=NULL;
79df9d62 1214#endif
bc36ee62 1215#ifndef OPENSSL_NO_DH
d02b48c6 1216 DH *dh=NULL;
58964a49 1217#endif
ea262260
BM		 1218#ifndef OPENSSL_NO_ECDH
1219 EC_KEY *ecdh = NULL;
1220 BN_CTX *bn_ctx = NULL;
1221 EC_POINT *srvr_ecpoint = NULL;
1222 int curve_nid = 0;
1223 int encoded_pt_len = 0;
1224#endif
d02b48c6 1225
37a7cd1a
BM		 1226 /* use same message size as in ssl3_get_certificate_request()
1227 * as ServerKeyExchange message may be skipped */
36d16f8e 1228 n=s->method->ssl_get_message(s,
d02b48c6
RE		 1229 SSL3_ST_CR_KEY_EXCH_A,
1230 SSL3_ST_CR_KEY_EXCH_B,
1231 -1,
c0f5dd07 1232 s->max_cert_list,
d02b48c6 1233 &ok);
d02b48c6
RE		 1234 if (!ok) return((int)n);
1235
1236 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1237 {
ddac1974
NL		 1238#ifndef OPENSSL_NO_PSK
1239 /* In plain PSK ciphersuite, ServerKeyExchange can be
1240 omitted if no identity hint is sent. Set
1241 session->sess_cert anyway to avoid problems
1242 later.*/
52b8dad8 1243 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
ddac1974
NL		 1244 {
1245 s->session->sess_cert=ssl_sess_cert_new();
1246 if (s->ctx->psk_identity_hint)
1247 OPENSSL_free(s->ctx->psk_identity_hint);
1248 s->ctx->psk_identity_hint = NULL;
1249 }
1250#endif
d02b48c6
RE		 1251 s->s3->tmp.reuse_message=1;
1252 return(1);
1253 }
1254
48948d53 1255 param=p=(unsigned char *)s->init_msg;
9d5cceac 1256 if (s->session->sess_cert != NULL)
d02b48c6 1257 {
bc36ee62 1258#ifndef OPENSSL_NO_RSA
b56bce4f 1259 if (s->session->sess_cert->peer_rsa_tmp != NULL)
d02b48c6 1260 {
b56bce4f
BM		 1261 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1262 s->session->sess_cert->peer_rsa_tmp=NULL;
d02b48c6
RE		 1263 }
1264#endif
bc36ee62 1265#ifndef OPENSSL_NO_DH
b56bce4f 1266 if (s->session->sess_cert->peer_dh_tmp)
d02b48c6 1267 {
b56bce4f
BM		 1268 DH_free(s->session->sess_cert->peer_dh_tmp);
1269 s->session->sess_cert->peer_dh_tmp=NULL;
d02b48c6 1270 }
ea262260
BM		 1271#endif
1272#ifndef OPENSSL_NO_ECDH
1273 if (s->session->sess_cert->peer_ecdh_tmp)
1274 {
1275 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1276 s->session->sess_cert->peer_ecdh_tmp=NULL;
1277 }
d02b48c6
RE		 1278#endif
1279 }
1280 else
1281 {
b56bce4f 1282 s->session->sess_cert=ssl_sess_cert_new();
d02b48c6
RE		 1283 }
1284
1285 param_len=0;
52b8dad8
BM		 1286 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1287 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
dbad1690 1288 EVP_MD_CTX_init(&md_ctx);
d02b48c6 1289
ddac1974 1290#ifndef OPENSSL_NO_PSK
52b8dad8
BM		 1291 if (alg_k & SSL_kPSK)
1292 {
ddac1974
NL		 1293 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1294
1295 al=SSL_AD_HANDSHAKE_FAILURE;
1296 n2s(p,i);
1297 param_len=i+2;
1298 /* Store PSK identity hint for later use, hint is used
1299 * in ssl3_send_client_key_exchange. Assume that the
1300 * maximum length of a PSK identity hint can be as
1301 * long as the maximum length of a PSK identity. */
1302 if (i > PSK_MAX_IDENTITY_LEN)
1303 {
1304 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1305 SSL_R_DATA_LENGTH_TOO_LONG);
1306 goto f_err;
1307 }
1308 if (param_len > n)
1309 {
1310 al=SSL_AD_DECODE_ERROR;
1311 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1312 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1313 goto f_err;
1314 }
1315 /* If received PSK identity hint contains NULL
1316 * characters, the hint is truncated from the first
1317 * NULL. p may not be ending with NULL, so create a
1318 * NULL-terminated string. */
1319 memcpy(tmp_id_hint, p, i);
1320 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1321 if (s->ctx->psk_identity_hint != NULL)
1322 OPENSSL_free(s->ctx->psk_identity_hint);
1323 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1324 if (s->ctx->psk_identity_hint == NULL)
1325 {
1326 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1327 goto f_err;
52b8dad8 1328 }
ddac1974
NL		 1329
1330 p+=i;
1331 n-=param_len;
1332 }
1333 else
1334#endif /* !OPENSSL_NO_PSK */
edc032b5
BL		 1335#ifndef OPENSSL_NO_SRP
1336 if (alg_k & SSL_kSRP)
1337 {
1338 n2s(p,i);
1339 param_len=i+2;
1340 if (param_len > n)
1341 {
1342 al=SSL_AD_DECODE_ERROR;
1343 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1344 goto f_err;
1345 }
1346 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1347 {
1348 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1349 goto err;
1350 }
1351 p+=i;
1352
1353 n2s(p,i);
1354 param_len+=i+2;
1355 if (param_len > n)
1356 {
1357 al=SSL_AD_DECODE_ERROR;
1358 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1359 goto f_err;
1360 }
1361 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1362 {
1363 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1364 goto err;
1365 }
1366 p+=i;
1367
1368 i = (unsigned int)(p[0]);
1369 p++;
1370 param_len+=i+1;
1371 if (param_len > n)
1372 {
1373 al=SSL_AD_DECODE_ERROR;
1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1375 goto f_err;
1376 }
1377 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1378 {
1379 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1380 goto err;
1381 }
1382 p+=i;
1383
1384 n2s(p,i);
1385 param_len+=i+2;
1386 if (param_len > n)
1387 {
1388 al=SSL_AD_DECODE_ERROR;
1389 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1390 goto f_err;
1391 }
1392 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1393 {
1394 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1395 goto err;
1396 }
1397 p+=i;
1398 n-=param_len;
1399
1400/* We must check if there is a certificate */
1401#ifndef OPENSSL_NO_RSA
1402 if (alg_a & SSL_aRSA)
1403 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1404#else
1405 if (0)
1406 ;
1407#endif
1408#ifndef OPENSSL_NO_DSA
1409 else if (alg_a & SSL_aDSS)
1410 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1411#endif
1412 }
1413 else
1414#endif /* !OPENSSL_NO_SRP */
bc36ee62 1415#ifndef OPENSSL_NO_RSA
52b8dad8 1416 if (alg_k & SSL_kRSA)
d02b48c6
RE		 1417 {
1418 if ((rsa=RSA_new()) == NULL)
1419 {
1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1421 goto err;
1422 }
1423 n2s(p,i);
1424 param_len=i+2;
1425 if (param_len > n)
1426 {
58964a49 1427 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1428 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1429 goto f_err;
1430 }
1431 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1432 {
1433 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1434 goto err;
1435 }
1436 p+=i;
1437
1438 n2s(p,i);
1439 param_len+=i+2;
1440 if (param_len > n)
1441 {
58964a49 1442 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1443 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1444 goto f_err;
1445 }
1446 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1447 {
1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1449 goto err;
1450 }
1451 p+=i;
1452 n-=param_len;
1453
d02b48c6 1454 /* this should be because we are using an export cipher */
52b8dad8 1455 if (alg_a & SSL_aRSA)
b56bce4f 1456 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
d02b48c6
RE		 1457 else
1458 {
5277d7cb 1459 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
d02b48c6
RE		 1460 goto err;
1461 }
b56bce4f 1462 s->session->sess_cert->peer_rsa_tmp=rsa;
6b521df3 1463 rsa=NULL;
d02b48c6 1464 }
bc36ee62 1465#else /* OPENSSL_NO_RSA */
3f2599d9
BM		 1466 if (0)
1467 ;
d02b48c6 1468#endif
bc36ee62 1469#ifndef OPENSSL_NO_DH
52b8dad8 1470 else if (alg_k & SSL_kEDH)
d02b48c6
RE		 1471 {
1472 if ((dh=DH_new()) == NULL)
1473 {
1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1475 goto err;
1476 }
1477 n2s(p,i);
1478 param_len=i+2;
1479 if (param_len > n)
1480 {
58964a49 1481 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1483 goto f_err;
1484 }
1485 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1486 {
1487 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1488 goto err;
1489 }
1490 p+=i;
1491
1492 n2s(p,i);
1493 param_len+=i+2;
1494 if (param_len > n)
1495 {
58964a49 1496 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1498 goto f_err;
1499 }
1500 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1501 {
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1503 goto err;
1504 }
1505 p+=i;
1506
1507 n2s(p,i);
1508 param_len+=i+2;
1509 if (param_len > n)
1510 {
58964a49 1511 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1513 goto f_err;
1514 }
1515 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1516 {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1518 goto err;
1519 }
1520 p+=i;
1521 n-=param_len;
1522
bc36ee62 1523#ifndef OPENSSL_NO_RSA
52b8dad8 1524 if (alg_a & SSL_aRSA)
b56bce4f 1525 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
3f2599d9
BM		 1526#else
1527 if (0)
1528 ;
d02b48c6 1529#endif
bc36ee62 1530#ifndef OPENSSL_NO_DSA
52b8dad8 1531 else if (alg_a & SSL_aDSS)
b56bce4f 1532 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
d02b48c6
RE		 1533#endif
1534 /* else anonymous DH, so no certificate or pkey. */
1535
b56bce4f 1536 s->session->sess_cert->peer_dh_tmp=dh;
413c4f45 1537 dh=NULL;
d02b48c6 1538 }
52b8dad8 1539 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
d02b48c6 1540 {
58964a49 1541 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1543 goto f_err;
1544 }
bc36ee62 1545#endif /* !OPENSSL_NO_DH */
ea262260
BM		 1546
1547#ifndef OPENSSL_NO_ECDH
52b8dad8 1548 else if (alg_k & SSL_kEECDH)
ea262260 1549 {
9dd84053
NL		 1550 EC_GROUP *ngroup;
1551 const EC_GROUP *group;
1552
ea262260
BM		 1553 if ((ecdh=EC_KEY_new()) == NULL)
1554 {
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1556 goto err;
1557 }
1558
1559 /* Extract elliptic curve parameters and the
1560 * server's ephemeral ECDH public key.
1561 * Keep accumulating lengths of various components in
1562 * param_len and make sure it never exceeds n.
1563 */
1564
1565 /* XXX: For now we only support named (not generic) curves
d56349a2 1566 * and the ECParameters in this case is just three bytes.
ea262260 1567 */
d56349a2 1568 param_len=3;
ea262260
BM		 1569 if ((param_len > n) ||
1570 (*p != NAMED_CURVE_TYPE) ||
33273721 1571 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
ea262260
BM		 1572 {
1573 al=SSL_AD_INTERNAL_ERROR;
1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1575 goto f_err;
1576 }
1577
9dd84053
NL		 1578 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1579 if (ngroup == NULL)
1580 {
1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1582 goto err;
1583 }
1584 if (EC_KEY_set_group(ecdh, ngroup) == 0)
ea262260
BM		 1585 {
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1587 goto err;
1588 }
9dd84053
NL		 1589 EC_GROUP_free(ngroup);
1590
1591 group = EC_KEY_get0_group(ecdh);
ea262260
BM		 1592
1593 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
9dd84053 1594 (EC_GROUP_get_degree(group) > 163))
ea262260
BM		 1595 {
1596 al=SSL_AD_EXPORT_RESTRICTION;
1597 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1598 goto f_err;
1599 }
1600
d56349a2 1601 p+=3;
ea262260
BM		 1602
1603 /* Next, get the encoded ECPoint */
9dd84053 1604 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
ea262260
BM		 1605 ((bn_ctx = BN_CTX_new()) == NULL))
1606 {
1607 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1608 goto err;
1609 }
1610
1611 encoded_pt_len = *p; /* length of encoded point */
1612 p+=1;
1613 param_len += (1 + encoded_pt_len);
1614 if ((param_len > n) ||
9dd84053 1615 (EC_POINT_oct2point(group, srvr_ecpoint,
ea262260
BM		 1616 p, encoded_pt_len, bn_ctx) == 0))
1617 {
1618 al=SSL_AD_DECODE_ERROR;
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1620 goto f_err;
1621 }
1622
1623 n-=param_len;
1624 p+=encoded_pt_len;
1625
1626 /* The ECC/TLS specification does not mention
1627 * the use of DSA to sign ECParameters in the server
1628 * key exchange message. We do support RSA and ECDSA.
1629 */
1630 if (0) ;
1631#ifndef OPENSSL_NO_RSA
52b8dad8 1632 else if (alg_a & SSL_aRSA)
ea262260
BM		 1633 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1634#endif
1635#ifndef OPENSSL_NO_ECDSA
52b8dad8 1636 else if (alg_a & SSL_aECDSA)
ea262260
BM		 1637 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1638#endif
1639 /* else anonymous ECDH, so no certificate or pkey. */
9dd84053 1640 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
ea262260
BM		 1641 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1642 ecdh=NULL;
1643 BN_CTX_free(bn_ctx);
57594258 1644 bn_ctx = NULL;
9dd84053 1645 EC_POINT_free(srvr_ecpoint);
ea262260
BM		 1646 srvr_ecpoint = NULL;
1647 }
52b8dad8 1648 else if (alg_k)
ea262260
BM		 1649 {
1650 al=SSL_AD_UNEXPECTED_MESSAGE;
1651 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1652 goto f_err;
1653 }
1654#endif /* !OPENSSL_NO_ECDH */
dfeab068 1655
d02b48c6
RE		 1656
1657 /* p points to the next byte, there are 'n' bytes left */
1658
d02b48c6
RE		 1659 /* if it was signed, check the signature */
1660 if (pkey != NULL)
1661 {
238b6361 1662 if (TLS1_get_version(s) >= TLS1_2_VERSION)
a2f9200f
DSH		 1663 {
1664 int sigalg = tls12_get_sigid(pkey);
1665 /* Should never happen */
1666 if (sigalg == -1)
1667 {
1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1669 goto err;
1670 }
1671 /* Check key type is consistent with signature */
1672 if (sigalg != (int)p[1])
1673 {
1674 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1675 al=SSL_AD_DECODE_ERROR;
1676 goto f_err;
1677 }
1678 md = tls12_get_hash(p[0]);
1679 if (md == NULL)
1680 {
1681 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1682 al=SSL_AD_DECODE_ERROR;
1683 goto f_err;
1684 }
1685#ifdef SSL_DEBUG
1686fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1687#endif
1688 p += 2;
1689 n -= 2;
1690 }
1691 else
1692 md = EVP_sha1();
1693
d02b48c6
RE		 1694 n2s(p,i);
1695 n-=2;
1696 j=EVP_PKEY_size(pkey);
1697
1698 if ((i != n) || (n > j) || (n <= 0))
1699 {
1700 /* wrong packet length */
58964a49 1701 al=SSL_AD_DECODE_ERROR;
d02b48c6 1702 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
dfeab068 1703 goto f_err;
d02b48c6
RE		 1704 }
1705
bc36ee62 1706#ifndef OPENSSL_NO_RSA
238b6361 1707 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
d02b48c6
RE		 1708 {
1709 int num;
1710
1711 j=0;
1712 q=md_buf;
1713 for (num=2; num > 0; num--)
1714 {
086e32a6
DSH		 1715 EVP_MD_CTX_set_flags(&md_ctx,
1716 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
20d2186c
DSH		 1717 EVP_DigestInit_ex(&md_ctx,(num == 2)
1718 ?s->ctx->md5:s->ctx->sha1, NULL);
d02b48c6
RE		 1719 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1720 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1721 EVP_DigestUpdate(&md_ctx,param,param_len);
20d2186c 1722 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
d02b48c6
RE		 1723 q+=i;
1724 j+=i;
1725 }
1c80019a
DSH		 1726 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1727 pkey->pkey.rsa);
1728 if (i < 0)
d02b48c6 1729 {
58964a49 1730 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1732 goto f_err;
1733 }
1c80019a 1734 if (i == 0)
d02b48c6
RE		 1735 {
1736 /* bad signature */
58964a49 1737 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1738 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1739 goto f_err;
1740 }
1741 }
1742 else
1743#endif
ea262260 1744 {
a2f9200f 1745 EVP_VerifyInit_ex(&md_ctx, md, NULL);
ea262260
BM		 1746 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1747 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1748 EVP_VerifyUpdate(&md_ctx,param,param_len);
bab53405 1749 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
ea262260
BM		 1750 {
1751 /* bad signature */
1752 al=SSL_AD_DECRYPT_ERROR;
1753 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1754 goto f_err;
1755 }
1756 }
d02b48c6
RE		 1757 }
1758 else
1759 {
52b8dad8 1760 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
ddac1974 1761 /* aNULL or kPSK do not need public keys */
d02b48c6 1762 {
5277d7cb 1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
d02b48c6
RE		 1764 goto err;
1765 }
ddac1974 1766 /* still data left over */
d02b48c6
RE		 1767 if (n != 0)
1768 {
58964a49 1769 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1770 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1771 goto f_err;
1772 }
1773 }
a8236c8c 1774 EVP_PKEY_free(pkey);
dbad1690 1775 EVP_MD_CTX_cleanup(&md_ctx);
d02b48c6
RE		 1776 return(1);
1777f_err:
1778 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1779err:
a8236c8c 1780 EVP_PKEY_free(pkey);
bc36ee62 1781#ifndef OPENSSL_NO_RSA
6b521df3
BM		 1782 if (rsa != NULL)
1783 RSA_free(rsa);
1784#endif
bc36ee62 1785#ifndef OPENSSL_NO_DH
6b521df3
BM		 1786 if (dh != NULL)
1787 DH_free(dh);
ea262260
BM		 1788#endif
1789#ifndef OPENSSL_NO_ECDH
1790 BN_CTX_free(bn_ctx);
1791 EC_POINT_free(srvr_ecpoint);
1792 if (ecdh != NULL)
1793 EC_KEY_free(ecdh);
6b521df3 1794#endif
dbad1690 1795 EVP_MD_CTX_cleanup(&md_ctx);
d02b48c6
RE		 1796 return(-1);
1797 }
1798
36d16f8e 1799int ssl3_get_certificate_request(SSL *s)
d02b48c6
RE		 1800 {
1801 int ok,ret=0;
58964a49 1802 unsigned long n,nc,l;
8f829124 1803 unsigned int llen, ctype_num,i;
d02b48c6 1804 X509_NAME *xn=NULL;
875a644a
RL		 1805 const unsigned char *p,*q;
1806 unsigned char *d;
f73e07cf 1807 STACK_OF(X509_NAME) *ca_sk=NULL;
d02b48c6 1808
36d16f8e 1809 n=s->method->ssl_get_message(s,
d02b48c6
RE		 1810 SSL3_ST_CR_CERT_REQ_A,
1811 SSL3_ST_CR_CERT_REQ_B,
1812 -1,
c0f5dd07 1813 s->max_cert_list,
d02b48c6
RE		 1814 &ok);
1815
1816 if (!ok) return((int)n);
1817
1818 s->s3->tmp.cert_req=0;
1819
1820 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1821 {
1822 s->s3->tmp.reuse_message=1;
855a54a9
DSH		 1823 /* If we get here we don't need any cached handshake records
1824 * as we wont be doing client auth.
1825 */
1826 if (s->s3->handshake_buffer)
1827 {
1828 if (!ssl3_digest_cached_records(s))
1829 goto err;
1830 }
d02b48c6
RE		 1831 return(1);
1832 }
1833
1834 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1835 {
58964a49 1836 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
d02b48c6
RE		 1837 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1838 goto err;
1839 }
1840
58964a49
RE		 1841 /* TLS does not like anon-DH with client cert */
1842 if (s->version > SSL3_VERSION)
1843 {
52b8dad8 1844 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
58964a49
RE		 1845 {
1846 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1847 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1848 goto err;
1849 }
1850 }
1851
875a644a 1852 p=d=(unsigned char *)s->init_msg;
d02b48c6 1853
f73e07cf 1854 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
d02b48c6
RE		 1855 {
1856 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1857 goto err;
1858 }
1859
1860 /* get the certificate types */
1861 ctype_num= *(p++);
1862 if (ctype_num > SSL3_CT_NUMBER)
1863 ctype_num=SSL3_CT_NUMBER;
1864 for (i=0; i<ctype_num; i++)
1865 s->s3->tmp.ctype[i]= p[i];
1866 p+=ctype_num;
238b6361 1867 if (TLS1_get_version(s) >= TLS1_2_VERSION)
a2f9200f 1868 {
8f829124
DSH		 1869 n2s(p, llen);
1870 /* Check we have enough room for signature algorithms and
1871 * following length value.
1872 */
1873 if ((unsigned long)(p - d + llen + 2) > n)
1874 {
1875 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1876 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1877 goto err;
1878 }
1879 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1880 {
1881 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1882 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1883 goto err;
1884 }
1885 p += llen;
a2f9200f 1886 }
d02b48c6
RE		 1887
1888 /* get the CA RDNs */
1889 n2s(p,llen);
dfeab068
RE		 1890#if 0
1891{
1892FILE *out;
1893out=fopen("/tmp/vsign.der","w");
1894fwrite(p,1,llen,out);
1895fclose(out);
1896}
1897#endif
1898
8f829124 1899 if ((unsigned long)(p - d + llen) != n)
d02b48c6 1900 {
58964a49 1901 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1902 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1903 goto err;
1904 }
1905
1906 for (nc=0; nc<llen; )
1907 {
1908 n2s(p,l);
1909 if ((l+nc+2) > llen)
1910 {
58964a49 1911 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
d02b48c6 1912 goto cont; /* netscape bugs */
58964a49 1913 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1914 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1915 goto err;
1916 }
1917
1918 q=p;
1919
1920 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1921 {
657e60fa 1922 /* If netscape tolerance is on, ignore errors */
58964a49 1923 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
d02b48c6
RE		 1924 goto cont;
1925 else
1926 {
58964a49 1927 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1928 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1929 goto err;
1930 }
1931 }
1932
1933 if (q != (p+l))
1934 {
58964a49 1935 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1936 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1937 goto err;
1938 }
f73e07cf 1939 if (!sk_X509_NAME_push(ca_sk,xn))
d02b48c6
RE		 1940 {
1941 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1942 goto err;
1943 }
1944
1945 p+=l;
1946 nc+=l+2;
1947 }
1948
1949 if (0)
1950 {
1951cont:
1952 ERR_clear_error();
1953 }
1954
657e60fa 1955 /* we should setup a certificate to return.... */
d02b48c6
RE		 1956 s->s3->tmp.cert_req=1;
1957 s->s3->tmp.ctype_num=ctype_num;
1958 if (s->s3->tmp.ca_names != NULL)
f73e07cf 1959 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
d02b48c6
RE		 1960 s->s3->tmp.ca_names=ca_sk;
1961 ca_sk=NULL;
1962
1963 ret=1;
1964err:
f73e07cf 1965 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
d02b48c6
RE		 1966 return(ret);
1967 }
1968
ccd86b68 1969static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
d02b48c6
RE		 1970 {
1971 return(X509_NAME_cmp(*a,*b));
1972 }
6434abbf
DSH		 1973#ifndef OPENSSL_NO_TLSEXT
1974int ssl3_get_new_session_ticket(SSL *s)
1975 {
1976 int ok,al,ret=0, ticklen;
1977 long n;
1978 const unsigned char *p;
1979 unsigned char *d;
1980
1981 n=s->method->ssl_get_message(s,
1982 SSL3_ST_CR_SESSION_TICKET_A,
1983 SSL3_ST_CR_SESSION_TICKET_B,
1984 -1,
1985 16384,
1986 &ok);
1987
1988 if (!ok)
1989 return((int)n);
1990
1991 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1992 {
1993 s->s3->tmp.reuse_message=1;
1994 return(1);
1995 }
1996 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1997 {
1998 al=SSL_AD_UNEXPECTED_MESSAGE;
1999 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2000 goto f_err;
2001 }
2002 if (n < 6)
2003 {
2004 /* need at least ticket_lifetime_hint + ticket length */
2005 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
2006 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2007 goto f_err;
2008 }
8025e251 2009
6434abbf
DSH		 2010 p=d=(unsigned char *)s->init_msg;
2011 n2l(p, s->session->tlsext_tick_lifetime_hint);
2012 n2s(p, ticklen);
2013 /* ticket_lifetime_hint + ticket_length + ticket */
2014 if (ticklen + 6 != n)
2015 {
2016 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
761772d7 2017 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
6434abbf
DSH		 2018 goto f_err;
2019 }
2020 if (s->session->tlsext_tick)
2021 {
2022 OPENSSL_free(s->session->tlsext_tick);
2023 s->session->tlsext_ticklen = 0;
2024 }
2025 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2026 if (!s->session->tlsext_tick)
2027 {
761772d7 2028 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
6434abbf
DSH		 2029 goto err;
2030 }
2031 memcpy(s->session->tlsext_tick, p, ticklen);
2032 s->session->tlsext_ticklen = ticklen;
4b4ba6a8
DSH		 2033 /* There are two ways to detect a resumed ticket sesion.
2034 * One is to set an appropriate session ID and then the server
2035 * must return a match in ServerHello. This allows the normal
2036 * client session ID matching to work and we know much
2037 * earlier that the ticket has been accepted.
2038 *
2039 * The other way is to set zero length session ID when the
2040 * ticket is presented and rely on the handshake to determine
2041 * session resumption.
2042 *
2043 * We choose the former approach because this fits in with
2044 * assumptions elsewhere in OpenSSL. The session ID is set
2045 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2046 * ticket.
2047 */
2048 EVP_Digest(p, ticklen,
2049 s->session->session_id, &s->session->session_id_length,
2050#ifndef OPENSSL_NO_SHA256
2051 EVP_sha256(), NULL);
2052#else
2053 EVP_sha1(), NULL);
2054#endif
6434abbf
DSH		 2055 ret=1;
2056 return(ret);
2057f_err:
2058 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2059err:
2060 return(-1);
2061 }
67c8e7f4
DSH		 2062
2063int ssl3_get_cert_status(SSL *s)
2064 {
2065 int ok, al;
aff686df 2066 unsigned long resplen,n;
67c8e7f4
DSH		 2067 const unsigned char *p;
2068
2069 n=s->method->ssl_get_message(s,
2070 SSL3_ST_CR_CERT_STATUS_A,
2071 SSL3_ST_CR_CERT_STATUS_B,
2072 SSL3_MT_CERTIFICATE_STATUS,
2073 16384,
2074 &ok);
2075
2076 if (!ok) return((int)n);
2077 if (n < 4)
2078 {
2079 /* need at least status type + length */
2080 al = SSL_AD_DECODE_ERROR;
2081 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2082 goto f_err;
2083 }
2084 p = (unsigned char *)s->init_msg;
2085 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2086 {
2087 al = SSL_AD_DECODE_ERROR;
2088 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2089 goto f_err;
2090 }
2091 n2l3(p, resplen);
2092 if (resplen + 4 != n)
2093 {
2094 al = SSL_AD_DECODE_ERROR;
2095 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2096 goto f_err;
2097 }
2098 if (s->tlsext_ocsp_resp)
2099 OPENSSL_free(s->tlsext_ocsp_resp);
2100 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2101 if (!s->tlsext_ocsp_resp)
2102 {
2103 al = SSL_AD_INTERNAL_ERROR;
2104 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2105 goto f_err;
2106 }
2107 s->tlsext_ocsp_resplen = resplen;
2108 if (s->ctx->tlsext_status_cb)
2109 {
2110 int ret;
2111 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2112 if (ret == 0)
2113 {
2114 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2115 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2116 goto f_err;
2117 }
2118 if (ret < 0)
2119 {
2120 al = SSL_AD_INTERNAL_ERROR;
2121 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2122 goto f_err;
2123 }
2124 }
2125 return 1;
2126f_err:
2127 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2128 return(-1);
2129 }
6434abbf 2130#endif
d02b48c6 2131
36d16f8e 2132int ssl3_get_server_done(SSL *s)
d02b48c6
RE		 2133 {
2134 int ok,ret=0;
2135 long n;
2136
36d16f8e 2137 n=s->method->ssl_get_message(s,
d02b48c6
RE		 2138 SSL3_ST_CR_SRVR_DONE_A,
2139 SSL3_ST_CR_SRVR_DONE_B,
2140 SSL3_MT_SERVER_DONE,
2141 30, /* should be very small, like 0 :-) */
2142 &ok);
2143
2144 if (!ok) return((int)n);
2145 if (n > 0)
2146 {
2147 /* should contain no data */
58964a49 2148 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6 2149 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
c59ba5b5 2150 return -1;
d02b48c6
RE		 2151 }
2152 ret=1;
2153 return(ret);
2154 }
2155
176f31dd 2156
36d16f8e 2157int ssl3_send_client_key_exchange(SSL *s)
d02b48c6 2158 {
79df9d62 2159 unsigned char *p,*d;
d02b48c6 2160 int n;
52b8dad8 2161 unsigned long alg_k;
bc36ee62 2162#ifndef OPENSSL_NO_RSA
79df9d62 2163 unsigned char *q;
d02b48c6 2164 EVP_PKEY *pkey=NULL;
79df9d62 2165#endif
bc36ee62 2166#ifndef OPENSSL_NO_KRB5
57376542 2167 KSSL_ERR kssl_err;
bc36ee62 2168#endif /* OPENSSL_NO_KRB5 */
ea262260
BM		 2169#ifndef OPENSSL_NO_ECDH
2170 EC_KEY *clnt_ecdh = NULL;
9dd84053 2171 const EC_POINT *srvr_ecpoint = NULL;
ea262260
BM		 2172 EVP_PKEY *srvr_pub_pkey = NULL;
2173 unsigned char *encodedPoint = NULL;
2174 int encoded_pt_len = 0;
2175 BN_CTX * bn_ctx = NULL;
2176#endif
d02b48c6
RE		 2177
2178 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2179 {
2180 d=(unsigned char *)s->init_buf->data;
2181 p= &(d[4]);
2182
52b8dad8 2183 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
d02b48c6 2184
57376542
BM		 2185 /* Fool emacs indentation */
2186 if (0) {}
bc36ee62 2187#ifndef OPENSSL_NO_RSA
52b8dad8 2188 else if (alg_k & SSL_kRSA)
d02b48c6
RE		 2189 {
2190 RSA *rsa;
dfeab068 2191 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
d02b48c6 2192
b56bce4f
BM		 2193 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2194 rsa=s->session->sess_cert->peer_rsa_tmp;
d02b48c6
RE		 2195 else
2196 {
b56bce4f 2197 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
d02b48c6
RE		 2198 if ((pkey == NULL) ||
2199 (pkey->type != EVP_PKEY_RSA) ||
2200 (pkey->pkey.rsa == NULL))
2201 {
5277d7cb 2202 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
d02b48c6
RE		 2203 goto err;
2204 }
2205 rsa=pkey->pkey.rsa;
50596582 2206 EVP_PKEY_free(pkey);
d02b48c6
RE		 2207 }
2208
413c4f45
MC		 2209 tmp_buf[0]=s->client_version>>8;
2210 tmp_buf[1]=s->client_version&0xff;
54a656ef 2211 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
e7f97e2d 2212 goto err;
d02b48c6 2213
54a656ef 2214 s->session->master_key_length=sizeof tmp_buf;
d02b48c6 2215
58964a49
RE		 2216 q=p;
2217 /* Fix buf for TLS and beyond */
2218 if (s->version > SSL3_VERSION)
2219 p+=2;
54a656ef 2220 n=RSA_public_encrypt(sizeof tmp_buf,
58964a49 2221 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
dfeab068
RE		 2222#ifdef PKCS1_CHECK
2223 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2224 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2225#endif
d02b48c6
RE		 2226 if (n <= 0)
2227 {
2228 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2229 goto err;
2230 }
2231
58964a49
RE		 2232 /* Fix buf for TLS and beyond */
2233 if (s->version > SSL3_VERSION)
2234 {
2235 s2n(n,q);
2236 n+=2;
2237 }
2238
d02b48c6 2239 s->session->master_key_length=
58964a49 2240 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6 2241 s->session->master_key,
54a656ef 2242 tmp_buf,sizeof tmp_buf);
4579924b 2243 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
d02b48c6 2244 }
f9b3bff6 2245#endif
bc36ee62 2246#ifndef OPENSSL_NO_KRB5
52b8dad8 2247 else if (alg_k & SSL_kKRB5)
57376542
BM		 2248 {
2249 krb5_error_code krb5rc;
2250 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2251 /* krb5_data krb5_ap_req; */
2252 krb5_data *enc_ticket;
2253 krb5_data authenticator, *authp = NULL;
2a1ef754 2254 EVP_CIPHER_CTX ciph_ctx;
ef236ec3 2255 const EVP_CIPHER *enc = NULL;
2a1ef754
RL		 2256 unsigned char iv[EVP_MAX_IV_LENGTH];
2257 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2258 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2259 + EVP_MAX_IV_LENGTH];
2260 int padl, outl = sizeof(epms);
f9b3bff6 2261
de941e28
DSH		 2262 EVP_CIPHER_CTX_init(&ciph_ctx);
2263
f9b3bff6 2264#ifdef KSSL_DEBUG
57376542 2265 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
7e69565f 2266 alg_k, SSL_kKRB5);
f9b3bff6
RL		 2267#endif /* KSSL_DEBUG */
2268
2a1ef754
RL		 2269 authp = NULL;
2270#ifdef KRB5SENDAUTH
2271 if (KRB5SENDAUTH) authp = &authenticator;
2272#endif /* KRB5SENDAUTH */
2273
57376542 2274 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2a1ef754
RL		 2275 &kssl_err);
2276 enc = kssl_map_enc(kssl_ctx->enctype);
57376542
BM		 2277 if (enc == NULL)
2278 goto err;
f9b3bff6 2279#ifdef KSSL_DEBUG
57376542
BM		 2280 {
2281 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2282 if (krb5rc && kssl_err.text)
2a1ef754 2283 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
57376542 2284 }
f9b3bff6
RL		 2285#endif /* KSSL_DEBUG */
2286
57376542
BM		 2287 if (krb5rc)
2288 {
2289 ssl3_send_alert(s,SSL3_AL_FATAL,
2a1ef754 2290 SSL_AD_HANDSHAKE_FAILURE);
57376542 2291 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2a1ef754 2292 kssl_err.reason);
57376542
BM		 2293 goto err;
2294 }
f9b3bff6 2295
2a1ef754
RL		 2296 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2297 ** in place of RFC 2712 KerberosWrapper, as in:
2298 **
57376542
BM		 2299 ** Send ticket (copy to *p, set n = length)
2300 ** n = krb5_ap_req.length;
2301 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2302 ** if (krb5_ap_req.data)
2303 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2304 **
2a1ef754
RL		 2305 ** Now using real RFC 2712 KerberosWrapper
2306 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2307 ** Note: 2712 "opaque" types are here replaced
2308 ** with a 2-byte length followed by the value.
2309 ** Example:
2310 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2311 ** Where "xx xx" = length bytes. Shown here with
2312 ** optional authenticator omitted.
2313 */
2314
2315 /* KerberosWrapper.Ticket */
2316 s2n(enc_ticket->length,p);
2317 memcpy(p, enc_ticket->data, enc_ticket->length);
2318 p+= enc_ticket->length;
2319 n = enc_ticket->length + 2;
2320
2321 /* KerberosWrapper.Authenticator */
2322 if (authp && authp->length)
2323 {
2324 s2n(authp->length,p);
2325 memcpy(p, authp->data, authp->length);
2326 p+= authp->length;
2327 n+= authp->length + 2;
2328
2329 free(authp->data);
2330 authp->data = NULL;
2331 authp->length = 0;
2332 }
2333 else
2334 {
2335 s2n(0,p);/* null authenticator length */
2336 n+=2;
2337 }
2338
cbb92dfa
RL		 2339 tmp_buf[0]=s->client_version>>8;
2340 tmp_buf[1]=s->client_version&0xff;
2341 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2342 goto err;
2a1ef754
RL		 2343
2344 /* 20010420 VRS. Tried it this way; failed.
581f1c84 2345 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2a1ef754
RL		 2346 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2347 ** kssl_ctx->length);
581f1c84 2348 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2a1ef754
RL		 2349 */
2350
54a656ef 2351 memset(iv, 0, sizeof iv); /* per RFC 1510 */
7beb4087
RL		 2352 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2353 kssl_ctx->key,iv);
2a1ef754 2354 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
54a656ef 2355 sizeof tmp_buf);
581f1c84 2356 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2a1ef754 2357 outl += padl;
ef236ec3 2358 if (outl > (int)sizeof epms)
5574e0ed
BM		 2359 {
2360 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2361 goto err;
2362 }
2a1ef754
RL		 2363 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2364
2365 /* KerberosWrapper.EncryptedPreMasterSecret */
2366 s2n(outl,p);
2367 memcpy(p, epms, outl);
2368 p+=outl;
2369 n+=outl + 2;
2370
57376542 2371 s->session->master_key_length=
52b8dad8 2372 s->method->ssl3_enc->generate_master_secret(s,
2a1ef754 2373 s->session->master_key,
54a656ef 2374 tmp_buf, sizeof tmp_buf);
2a1ef754 2375
4579924b
RL		 2376 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2377 OPENSSL_cleanse(epms, outl);
57376542 2378 }
d02b48c6 2379#endif
bc36ee62 2380#ifndef OPENSSL_NO_DH
52b8dad8 2381 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
d02b48c6
RE		 2382 {
2383 DH *dh_srvr,*dh_clnt;
2384
e194fe8f
BM		 2385 if (s->session->sess_cert == NULL)
2386 {
2387 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2388 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2389 goto err;
2390 }
2391
b56bce4f
BM		 2392 if (s->session->sess_cert->peer_dh_tmp != NULL)
2393 dh_srvr=s->session->sess_cert->peer_dh_tmp;
d02b48c6
RE		 2394 else
2395 {
2396 /* we get them from the cert */
58964a49 2397 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 2398 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2399 goto err;
2400 }
2401
2402 /* generate a new random key */
2403 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2404 {
2405 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2406 goto err;
2407 }
2408 if (!DH_generate_key(dh_clnt))
2409 {
2410 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2411 goto err;
2412 }
2413
2414 /* use the 'p' output buffer for the DH key, but
2415 * make sure to clear it out afterwards */
58964a49 2416
d02b48c6 2417 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
58964a49 2418
d02b48c6
RE		 2419 if (n <= 0)
2420 {
2421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2422 goto err;
2423 }
2424
2425 /* generate master key from the result */
2426 s->session->master_key_length=
58964a49 2427 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 2428 s->session->master_key,p,n);
2429 /* clean up */
2430 memset(p,0,n);
2431
2432 /* send off the data */
2433 n=BN_num_bytes(dh_clnt->pub_key);
2434 s2n(n,p);
2435 BN_bn2bin(dh_clnt->pub_key,p);
2436 n+=2;
2437
2438 DH_free(dh_clnt);
2439
2440 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2441 }
d02b48c6 2442#endif
ea262260
BM		 2443
2444#ifndef OPENSSL_NO_ECDH
52b8dad8 2445 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
ea262260 2446 {
9dd84053
NL		 2447 const EC_GROUP *srvr_group = NULL;
2448 EC_KEY *tkey;
ea262260 2449 int ecdh_clnt_cert = 0;
968766ca 2450 int field_size = 0;
ea262260
BM		 2451
2452 /* Did we send out the client's
2453 * ECDH share for use in premaster
2454 * computation as part of client certificate?
2455 * If so, set ecdh_clnt_cert to 1.
2456 */
52b8dad8 2457 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
ea262260
BM		 2458 {
2459 /* XXX: For now, we do not support client
2460 * authentication using ECDH certificates.
2461 * To add such support, one needs to add
2462 * code that checks for appropriate
2463 * conditions and sets ecdh_clnt_cert to 1.
2464 * For example, the cert have an ECC
2465 * key on the same curve as the server's
2466 * and the key should be authorized for
2467 * key agreement.
2468 *
2469 * One also needs to add code in ssl3_connect
2470 * to skip sending the certificate verify
2471 * message.
2472 *
2473 * if ((s->cert->key->privatekey != NULL) &&
2474 * (s->cert->key->privatekey->type ==
0c7141a3 2475 * EVP_PKEY_EC) && ...)
ea262260
BM		 2476 * ecdh_clnt_cert = 1;
2477 */
2478 }
2479
2480 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2481 {
9dd84053 2482 tkey = s->session->sess_cert->peer_ecdh_tmp;
ea262260
BM		 2483 }
2484 else
2485 {
2486 /* Get the Server Public Key from Cert */
2487 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2488 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2489 if ((srvr_pub_pkey == NULL) ||
5488bb61 2490 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
9dd84053 2491 (srvr_pub_pkey->pkey.ec == NULL))
ea262260
BM		 2492 {
2493 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2494 ERR_R_INTERNAL_ERROR);
2495 goto err;
2496 }
2497
9dd84053 2498 tkey = srvr_pub_pkey->pkey.ec;
ea262260
BM		 2499 }
2500
9dd84053
NL		 2501 srvr_group = EC_KEY_get0_group(tkey);
2502 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2503
ea262260
BM		 2504 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2505 {
2506 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2507 ERR_R_INTERNAL_ERROR);
2508 goto err;
2509 }
2510
2511 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2512 {
2513 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2514 goto err;
2515 }
2516
9dd84053
NL		 2517 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2518 {
2519 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2520 goto err;
2521 }
ea262260
BM		 2522 if (ecdh_clnt_cert)
2523 {
57376542 2524 /* Reuse key info from our certificate
ea262260
BM		 2525 * We only need our private key to perform
2526 * the ECDH computation.
2527 */
9dd84053
NL		 2528 const BIGNUM *priv_key;
2529 tkey = s->cert->key->privatekey->pkey.ec;
2530 priv_key = EC_KEY_get0_private_key(tkey);
2531 if (priv_key == NULL)
2532 {
2533 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2534 goto err;
2535 }
2536 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2537 {
2538 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2539 goto err;
2540 }
ea262260
BM		 2541 }
2542 else
2543 {
2544 /* Generate a new ECDH key pair */
2545 if (!(EC_KEY_generate_key(clnt_ecdh)))
2546 {
2547 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2548 goto err;
2549 }
2550 }
2551
57376542
BM		 2552 /* use the 'p' output buffer for the ECDH key, but
2553 * make sure to clear it out afterwards
ea262260
BM		 2554 */
2555
9dd84053 2556 field_size = EC_GROUP_get_degree(srvr_group);
968766ca
BM		 2557 if (field_size <= 0)
2558 {
2559 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2560 ERR_R_ECDH_LIB);
2561 goto err;
2562 }
d56349a2 2563 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
ea262260 2564 if (n <= 0)
57376542
BM		 2565 {
2566 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
ea262260 2567 ERR_R_ECDH_LIB);
57376542 2568 goto err;
ea262260
BM		 2569 }
2570
57376542
BM		 2571 /* generate master key from the result */
2572 s->session->master_key_length = s->method->ssl3_enc \
ea262260
BM		 2573 -> generate_master_secret(s,
2574 s->session->master_key,
2575 p, n);
2576
57376542 2577 memset(p, 0, n); /* clean up */
ea262260
BM		 2578
2579 if (ecdh_clnt_cert)
2580 {
2581 /* Send empty client key exch message */
2582 n = 0;
2583 }
2584 else
2585 {
2586 /* First check the size of encoding and
2587 * allocate memory accordingly.
2588 */
2589 encoded_pt_len =
9dd84053
NL		 2590 EC_POINT_point2oct(srvr_group,
2591 EC_KEY_get0_public_key(clnt_ecdh),
ea262260
BM		 2592 POINT_CONVERSION_UNCOMPRESSED,
2593 NULL, 0, NULL);
2594
2595 encodedPoint = (unsigned char *)
2596 OPENSSL_malloc(encoded_pt_len *
2597 sizeof(unsigned char));
2598 bn_ctx = BN_CTX_new();
2599 if ((encodedPoint == NULL) ||
2600 (bn_ctx == NULL))
2601 {
2602 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2603 goto err;
2604 }
2605
2606 /* Encode the public key */
9dd84053
NL		 2607 n = EC_POINT_point2oct(srvr_group,
2608 EC_KEY_get0_public_key(clnt_ecdh),
ea262260
BM		 2609 POINT_CONVERSION_UNCOMPRESSED,
2610 encodedPoint, encoded_pt_len, bn_ctx);
2611
2612 *p = n; /* length of encoded point */
57376542 2613 /* Encoded point will be copied here */
ea262260
BM		 2614 p += 1;
2615 /* copy the point */
2616 memcpy((unsigned char *)p, encodedPoint, n);
2617 /* increment n to account for length field */
2618 n += 1;
2619 }
2620
2621 /* Free allocated memory */
2622 BN_CTX_free(bn_ctx);
2623 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2624 if (clnt_ecdh != NULL)
ea262260 2625 EC_KEY_free(clnt_ecdh);
ea262260
BM		 2626 EVP_PKEY_free(srvr_pub_pkey);
2627 }
2628#endif /* !OPENSSL_NO_ECDH */
0e1dba93
DSH		 2629 else if (alg_k & SSL_kGOST)
2630 {
2631 /* GOST key exchange message creation */
2632 EVP_PKEY_CTX *pkey_ctx;
2633 X509 *peer_cert;
2634 size_t msglen;
2635 unsigned int md_len;
2636 int keytype;
f0288f05 2637 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
0e1dba93
DSH		 2638 EVP_MD_CTX *ukm_hash;
2639 EVP_PKEY *pub_key;
2640
2641 /* Get server sertificate PKEY and create ctx from it */
2642 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2643 if (!peer_cert)
2644 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2645 if (!peer_cert) {
2646 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2647 goto err;
2648 }
2649
2650 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2651 /* If we have send a certificate, and certificate key
2652
2653 * parameters match those of server certificate, use
2654 * certificate key for key exchange
2655 */
2656
2657 /* Otherwise, generate ephemeral key pair */
2658
2659 EVP_PKEY_encrypt_init(pkey_ctx);
2660 /* Generate session key */
2661 RAND_bytes(premaster_secret,32);
2662 /* If we have client certificate, use its secret as peer key */
f0288f05
DSH		 2663 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2664 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
0e1dba93
DSH		 2665 /* If there was an error - just ignore it. Ephemeral key
2666 * would be used
2667 */
2668 ERR_clear_error();
f0288f05 2669 }
0e1dba93
DSH		 2670 }
2671 /* Compute shared IV and store it in algorithm-specific
2672 * context data */
2673 ukm_hash = EVP_MD_CTX_create();
2674 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2675 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2676 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2677 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2678 EVP_MD_CTX_destroy(ukm_hash);
2679 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2680 8,shared_ukm)<0) {
2681 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2682 SSL_R_LIBRARY_BUG);
2683 goto err;
2684 }
2685 /* Make GOST keytransport blob message */
2686 /*Encapsulate it into sequence */
2687 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
f0288f05
DSH		 2688 msglen=255;
2689 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
0e1dba93
DSH		 2690 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2691 SSL_R_LIBRARY_BUG);
2692 goto err;
f0288f05
DSH		 2693 }
2694 if (msglen >= 0x80)
2695 {
2696 *(p++)=0x81;
2697 *(p++)= msglen & 0xff;
2698 n=msglen+3;
2699 }
2700 else
2701 {
2702 *(p++)= msglen & 0xff;
2703 n=msglen+2;
2704 }
2705 memcpy(p, tmp, msglen);
2706 /* Check if pubkey from client certificate was used */
2707 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2708 {
2709 /* Set flag "skip certificate verify" */
2710 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2711 }
0e1dba93
DSH		 2712 EVP_PKEY_CTX_free(pkey_ctx);
2713 s->session->master_key_length=
2714 s->method->ssl3_enc->generate_master_secret(s,
2715 s->session->master_key,premaster_secret,32);
2716 EVP_PKEY_free(pub_key);
2717
2718 }
edc032b5
BL		 2719#ifndef OPENSSL_NO_SRP
2720 else if (alg_k & SSL_kSRP)
2721 {
2722 if (s->srp_ctx.A != NULL)
2723 {
2724 /* send off the data */
2725 n=BN_num_bytes(s->srp_ctx.A);
2726 s2n(n,p);
2727 BN_bn2bin(s->srp_ctx.A,p);
2728 n+=2;
2729 }
2730 else
2731 {
2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2733 goto err;
2734 }
2735 if (s->session->srp_username != NULL)
2736 OPENSSL_free(s->session->srp_username);
2737 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2738 if (s->session->srp_username == NULL)
2739 {
2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2741 ERR_R_MALLOC_FAILURE);
2742 goto err;
2743 }
2744
2745 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2746 {
23bc7961 2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
edc032b5
BL		 2748 goto err;
2749 }
2750 }
2751#endif
ddac1974 2752#ifndef OPENSSL_NO_PSK
52b8dad8 2753 else if (alg_k & SSL_kPSK)
ddac1974
NL		 2754 {
2755 char identity[PSK_MAX_IDENTITY_LEN];
2756 unsigned char *t = NULL;
2757 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2758 unsigned int pre_ms_len = 0, psk_len = 0;
2759 int psk_err = 1;
2760
2761 n = 0;
2762 if (s->psk_client_callback == NULL)
2763 {
2764 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2765 SSL_R_PSK_NO_CLIENT_CB);
2766 goto err;
2767 }
2768
2769 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2770 identity, PSK_MAX_IDENTITY_LEN,
2771 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2772 if (psk_len > PSK_MAX_PSK_LEN)
2773 {
2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2775 ERR_R_INTERNAL_ERROR);
2776 goto psk_err;
2777 }
2778 else if (psk_len == 0)
2779 {
2780 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2781 SSL_R_PSK_IDENTITY_NOT_FOUND);
2782 goto psk_err;
2783 }
2784
2785 /* create PSK pre_master_secret */
2786 pre_ms_len = 2+psk_len+2+psk_len;
2787 t = psk_or_pre_ms;
2788 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2789 s2n(psk_len, t);
2790 memset(t, 0, psk_len);
2791 t+=psk_len;
2792 s2n(psk_len, t);
2793
2794 if (s->session->psk_identity_hint != NULL)
2795 OPENSSL_free(s->session->psk_identity_hint);
2796 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2797 if (s->ctx->psk_identity_hint != NULL &&
2798 s->session->psk_identity_hint == NULL)
2799 {
2800 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2801 ERR_R_MALLOC_FAILURE);
2802 goto psk_err;
2803 }
2804
2805 if (s->session->psk_identity != NULL)
2806 OPENSSL_free(s->session->psk_identity);
2807 s->session->psk_identity = BUF_strdup(identity);
2808 if (s->session->psk_identity == NULL)
2809 {
2810 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2811 ERR_R_MALLOC_FAILURE);
2812 goto psk_err;
2813 }
2814
2815 s->session->master_key_length =
2816 s->method->ssl3_enc->generate_master_secret(s,
2817 s->session->master_key,
2818 psk_or_pre_ms, pre_ms_len);
2819 n = strlen(identity);
2820 s2n(n, p);
2821 memcpy(p, identity, n);
2822 n+=2;
2823 psk_err = 0;
2824 psk_err:
2825 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
52b8dad8 2826 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
ddac1974
NL		 2827 if (psk_err != 0)
2828 {
2829 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2830 goto err;
2831 }
2832 }
2833#endif
f9b3bff6 2834 else
d02b48c6 2835 {
ea262260
BM		 2836 ssl3_send_alert(s, SSL3_AL_FATAL,
2837 SSL_AD_HANDSHAKE_FAILURE);
2838 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2839 ERR_R_INTERNAL_ERROR);
d02b48c6
RE		 2840 goto err;
2841 }
2842
2843 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2844 l2n3(n,d);
2845
2846 s->state=SSL3_ST_CW_KEY_EXCH_B;
2847 /* number of bytes to write */
2848 s->init_num=n+4;
2849 s->init_off=0;
2850 }
2851
2852 /* SSL3_ST_CW_KEY_EXCH_B */
2853 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2854err:
ea262260
BM		 2855#ifndef OPENSSL_NO_ECDH
2856 BN_CTX_free(bn_ctx);
2857 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2858 if (clnt_ecdh != NULL)
ea262260 2859 EC_KEY_free(clnt_ecdh);
57376542 2860 EVP_PKEY_free(srvr_pub_pkey);
ea262260 2861#endif
d02b48c6
RE		 2862 return(-1);
2863 }
2864
36d16f8e 2865int ssl3_send_client_verify(SSL *s)
d02b48c6
RE		 2866 {
2867 unsigned char *p,*d;
2868 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2869 EVP_PKEY *pkey;
0e1dba93 2870 EVP_PKEY_CTX *pctx=NULL;
855a54a9 2871 EVP_MD_CTX mctx;
ca7fea96 2872 unsigned u=0;
d02b48c6 2873 unsigned long n;
58964a49 2874 int j;
d02b48c6 2875
855a54a9
DSH		 2876 EVP_MD_CTX_init(&mctx);
2877
d02b48c6
RE		 2878 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2879 {
2880 d=(unsigned char *)s->init_buf->data;
2881 p= &(d[4]);
2882 pkey=s->cert->key->privatekey;
0e1dba93
DSH		 2883/* Create context from key and test if sha1 is allowed as digest */
2884 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2885 EVP_PKEY_sign_init(pctx);
2886 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2887 {
238b6361 2888 if (TLS1_get_version(s) < TLS1_2_VERSION)
855a54a9 2889 s->method->ssl3_enc->cert_verify_mac(s,
0e1dba93
DSH		 2890 NID_sha1,
2891 &(data[MD5_DIGEST_LENGTH]));
2892 }
2893 else
2894 {
2895 ERR_clear_error();
2896 }
855a54a9
DSH		 2897 /* For TLS v1.2 send signature algorithm and signature
2898 * using agreed digest and cached handshake records.
2899 */
238b6361 2900 if (TLS1_get_version(s) >= TLS1_2_VERSION)
855a54a9
DSH		 2901 {
2902 long hdatalen = 0;
2903 void *hdata;
2904 const EVP_MD *md = s->cert->key->digest;
2905 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2906 &hdata);
2907 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2908 {
2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2910 ERR_R_INTERNAL_ERROR);
2911 goto err;
2912 }
2913 p += 2;
2914#ifdef SSL_DEBUG
2915 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2916 EVP_MD_name(md));
2917#endif
2918 if (!EVP_SignInit_ex(&mctx, md, NULL)
2919 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2920 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2921 {
2922 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2923 ERR_R_EVP_LIB);
2924 goto err;
2925 }
2926 s2n(u,p);
2927 n = u + 4;
2928 if (!ssl3_digest_cached_records(s))
2929 goto err;
2930 }
2931 else
bc36ee62 2932#ifndef OPENSSL_NO_RSA
d02b48c6
RE		 2933 if (pkey->type == EVP_PKEY_RSA)
2934 {
58964a49 2935 s->method->ssl3_enc->cert_verify_mac(s,
81025661
DSH		 2936 NID_md5,
2937 &(data[0]));
1c80019a
DSH		 2938 if (RSA_sign(NID_md5_sha1, data,
2939 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
ca7fea96 2940 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
d02b48c6
RE		 2941 {
2942 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2943 goto err;
2944 }
ca7fea96
BL		 2945 s2n(u,p);
2946 n=u+2;
d02b48c6
RE		 2947 }
2948 else
2949#endif
bc36ee62 2950#ifndef OPENSSL_NO_DSA
d02b48c6
RE		 2951 if (pkey->type == EVP_PKEY_DSA)
2952 {
2953 if (!DSA_sign(pkey->save_type,
2954 &(data[MD5_DIGEST_LENGTH]),
2955 SHA_DIGEST_LENGTH,&(p[2]),
2956 (unsigned int *)&j,pkey->pkey.dsa))
2957 {
2958 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2959 goto err;
2960 }
2961 s2n(j,p);
2962 n=j+2;
2963 }
2964 else
ea262260
BM		 2965#endif
2966#ifndef OPENSSL_NO_ECDSA
5488bb61 2967 if (pkey->type == EVP_PKEY_EC)
ea262260
BM		 2968 {
2969 if (!ECDSA_sign(pkey->save_type,
2970 &(data[MD5_DIGEST_LENGTH]),
2971 SHA_DIGEST_LENGTH,&(p[2]),
9dd84053 2972 (unsigned int *)&j,pkey->pkey.ec))
ea262260
BM		 2973 {
2974 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2975 ERR_R_ECDSA_LIB);
2976 goto err;
2977 }
2978 s2n(j,p);
2979 n=j+2;
2980 }
2981 else
d02b48c6 2982#endif
0e1dba93
DSH		 2983 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
2984 {
2985 unsigned char signbuf[64];
2986 int i;
9400d9ac 2987 size_t sigsize=64;
0e1dba93
DSH		 2988 s->method->ssl3_enc->cert_verify_mac(s,
2989 NID_id_GostR3411_94,
2990 data);
a25f33d2 2991 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
0e1dba93
DSH		 2992 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2993 ERR_R_INTERNAL_ERROR);
2994 goto err;
2995 }
2996 for (i=63,j=0; i>=0; j++, i--) {
2997 p[2+j]=signbuf[i];
2998 }
2999 s2n(j,p);
3000 n=j+2;
3001 }
3002 else
3003 {
5277d7cb 3004 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
d02b48c6 3005 goto err;
0e1dba93 3006 }
d02b48c6
RE		 3007 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3008 l2n3(n,d);
3009
ba9f80c5 3010 s->state=SSL3_ST_CW_CERT_VRFY_B;
d02b48c6
RE		 3011 s->init_num=(int)n+4;
3012 s->init_off=0;
3013 }
855a54a9 3014 EVP_MD_CTX_cleanup(&mctx);
0e1dba93 3015 EVP_PKEY_CTX_free(pctx);
d02b48c6
RE		 3016 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3017err:
855a54a9 3018 EVP_MD_CTX_cleanup(&mctx);
0e1dba93 3019 EVP_PKEY_CTX_free(pctx);
d02b48c6
RE		 3020 return(-1);
3021 }
3022
36d16f8e 3023int ssl3_send_client_certificate(SSL *s)
d02b48c6
RE		 3024 {
3025 X509 *x509=NULL;
3026 EVP_PKEY *pkey=NULL;
3027 int i;
3028 unsigned long l;
3029
3030 if (s->state == SSL3_ST_CW_CERT_A)
3031 {
3032 if ((s->cert == NULL) ||
3033 (s->cert->key->x509 == NULL) ||
3034 (s->cert->key->privatekey == NULL))
3035 s->state=SSL3_ST_CW_CERT_B;
3036 else
3037 s->state=SSL3_ST_CW_CERT_C;
3038 }
3039
3040 /* We need to get a client cert */
3041 if (s->state == SSL3_ST_CW_CERT_B)
3042 {
3043 /* If we get an error, we need to
3044 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3045 * We then get retied later */
3046 i=0;
368888bc 3047 i = ssl_do_client_cert_cb(s, &x509, &pkey);
d02b48c6
RE		 3048 if (i < 0)
3049 {
3050 s->rwstate=SSL_X509_LOOKUP;
3051 return(-1);
3052 }
3053 s->rwstate=SSL_NOTHING;
3054 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3055 {
3056 s->state=SSL3_ST_CW_CERT_B;
3057 if ( !SSL_use_certificate(s,x509) ||
3058 !SSL_use_PrivateKey(s,pkey))
3059 i=0;
3060 }
3061 else if (i == 1)
3062 {
3063 i=0;
3064 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3065 }
3066
3067 if (x509 != NULL) X509_free(x509);
3068 if (pkey != NULL) EVP_PKEY_free(pkey);
3069 if (i == 0)
3070 {
58964a49
RE		 3071 if (s->version == SSL3_VERSION)
3072 {
3073 s->s3->tmp.cert_req=0;
3074 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3075 return(1);
3076 }
3077 else
3078 {
3079 s->s3->tmp.cert_req=2;
3080 }
d02b48c6
RE		 3081 }
3082
3083 /* Ok, we have a cert */
3084 s->state=SSL3_ST_CW_CERT_C;
3085 }
3086
3087 if (s->state == SSL3_ST_CW_CERT_C)
3088 {
3089 s->state=SSL3_ST_CW_CERT_D;
58964a49
RE		 3090 l=ssl3_output_cert_chain(s,
3091 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
d02b48c6
RE		 3092 s->init_num=(int)l;
3093 s->init_off=0;
3094 }
3095 /* SSL3_ST_CW_CERT_D */
3096 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3097 }
3098
3099#define has_bits(i,m) (((i)&(m)) == (m))
3100
36d16f8e 3101int ssl3_check_cert_and_algorithm(SSL *s)
d02b48c6
RE		 3102 {
3103 int i,idx;
52b8dad8 3104 long alg_k,alg_a;
d02b48c6 3105 EVP_PKEY *pkey=NULL;
b56bce4f 3106 SESS_CERT *sc;
bc36ee62 3107#ifndef OPENSSL_NO_RSA
d02b48c6 3108 RSA *rsa;
79df9d62 3109#endif
bc36ee62 3110#ifndef OPENSSL_NO_DH
d02b48c6 3111 DH *dh;
79df9d62 3112#endif
d02b48c6 3113
52b8dad8
BM		 3114 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3115 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
d02b48c6
RE		 3116
3117 /* we don't have a certificate */
52b8dad8 3118 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
d02b48c6
RE		 3119 return(1);
3120
c1ca9d32
DSH		 3121 sc=s->session->sess_cert;
3122 if (sc == NULL)
3123 {
3124 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3125 goto err;
3126 }
3127
bc36ee62 3128#ifndef OPENSSL_NO_RSA
b56bce4f 3129 rsa=s->session->sess_cert->peer_rsa_tmp;
79df9d62 3130#endif
bc36ee62 3131#ifndef OPENSSL_NO_DH
b56bce4f 3132 dh=s->session->sess_cert->peer_dh_tmp;
79df9d62 3133#endif
d02b48c6
RE		 3134
3135 /* This is the passed certificate */
3136
b56bce4f 3137 idx=sc->peer_cert_type;
ea262260
BM		 3138#ifndef OPENSSL_NO_ECDH
3139 if (idx == SSL_PKEY_ECC)
3140 {
ed3ecd80 3141 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
a2f9200f 3142 s) == 0)
ea262260
BM		 3143 { /* check failed */
3144 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
52b8dad8 3145 goto f_err;
ea262260
BM		 3146 }
3147 else
3148 {
3149 return 1;
3150 }
3151 }
3152#endif
b56bce4f
BM		 3153 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3154 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
a8236c8c 3155 EVP_PKEY_free(pkey);
d02b48c6
RE		 3156
3157
3158 /* Check that we have a certificate if we require one */
52b8dad8 3159 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
d02b48c6
RE		 3160 {
3161 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3162 goto f_err;
3163 }
bc36ee62 3164#ifndef OPENSSL_NO_DSA
52b8dad8 3165 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
d02b48c6
RE		 3166 {
3167 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3168 goto f_err;
3169 }
3170#endif
bc36ee62 3171#ifndef OPENSSL_NO_RSA
52b8dad8 3172 if ((alg_k & SSL_kRSA) &&
d02b48c6
RE		 3173 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3174 {
3175 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3176 goto f_err;
3177 }
79df9d62 3178#endif
bc36ee62 3179#ifndef OPENSSL_NO_DH
52b8dad8 3180 if ((alg_k & SSL_kEDH) &&
d02b48c6
RE		 3181 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3182 {
3183 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3184 goto f_err;
3185 }
52b8dad8 3186 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
d02b48c6
RE		 3187 {
3188 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3189 goto f_err;
3190 }
bc36ee62 3191#ifndef OPENSSL_NO_DSA
52b8dad8 3192 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
d02b48c6
RE		 3193 {
3194 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3195 goto f_err;
3196 }
3197#endif
3198#endif
3199
018e57c7 3200 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
d02b48c6 3201 {
bc36ee62 3202#ifndef OPENSSL_NO_RSA
52b8dad8 3203 if (alg_k & SSL_kRSA)
d02b48c6 3204 {
06ab81f9 3205 if (rsa == NULL
70ef9c5a 3206 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
d02b48c6
RE		 3207 {
3208 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3209 goto f_err;
3210 }
3211 }
3212 else
3213#endif
bc36ee62 3214#ifndef OPENSSL_NO_DH
52b8dad8 3215 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
06ab81f9
BL		 3216 {
3217 if (dh == NULL
70ef9c5a 3218 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
d02b48c6
RE		 3219 {
3220 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3221 goto f_err;
3222 }
3223 }
3224 else
3225#endif
3226 {
3227 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3228 goto f_err;
3229 }
3230 }
3231 return(1);
3232f_err:
58964a49 3233 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 3234err:
3235 return(0);
3236 }
6434abbf
DSH		 3237
3238/* Check to see if handshake is full or resumed. Usually this is just a
3239 * case of checking to see if a cache hit has occurred. In the case of
3240 * session tickets we have to check the next message to be sure.
3241 */
3242
3243#ifndef OPENSSL_NO_TLSEXT
bf48836c 3244# ifndef OPENSSL_NO_NEXTPROTONEG
ee2ffc27
BL		 3245int ssl3_send_next_proto(SSL *s)
3246 {
3247 unsigned int len, padding_len;
3248 unsigned char *d;
3249
3250 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3251 {
3252 len = s->next_proto_negotiated_len;
3253 padding_len = 32 - ((len + 2) % 32);
3254 d = (unsigned char *)s->init_buf->data;
3255 d[4] = len;
3256 memcpy(d + 5, s->next_proto_negotiated, len);
3257 d[5 + len] = padding_len;
3258 memset(d + 6 + len, 0, padding_len);
3259 *(d++)=SSL3_MT_NEXT_PROTO;
3260 l2n3(2 + len + padding_len, d);
3261 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3262 s->init_num = 4 + 2 + len + padding_len;
3263 s->init_off = 0;
3264 }
3265
3266 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3267 }
3268# endif
3269
8025e251 3270int ssl3_check_finished(SSL *s)
6434abbf
DSH		 3271 {
3272 int ok;
3273 long n;
12bf56c0
DSH		 3274 /* If we have no ticket it cannot be a resumed session. */
3275 if (!s->session->tlsext_tick)
6434abbf
DSH		 3276 return 1;
3277 /* this function is called when we really expect a Certificate
3278 * message, so permit appropriate message length */
3279 n=s->method->ssl_get_message(s,
3280 SSL3_ST_CR_CERT_A,
3281 SSL3_ST_CR_CERT_B,
3282 -1,
3283 s->max_cert_list,
3284 &ok);
3285 if (!ok) return((int)n);
3286 s->s3->tmp.reuse_message = 1;
3287 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3288 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3289 return 2;
3290
3291 return 1;
3292 }
3293#endif
368888bc
DSH		 3294
3295int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3296 {
3297 int i = 0;
3298#ifndef OPENSSL_NO_ENGINE
3299 if (s->ctx->client_cert_engine)
3300 {
3301 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3302 SSL_get_client_CA_list(s),
3fc59c84 3303 px509, ppkey, NULL, NULL, NULL);
368888bc
DSH		 3304 if (i != 0)
3305 return i;
3306 }
3307#endif
3308 if (s->ctx->client_cert_cb)
3309 i = s->ctx->client_cert_cb(s,px509,ppkey);
3310 return i;
3311 }
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