Import OpenSSL-1.0.1h.
[dragonfly.git] / crypto / openssl / ssl / s3_clnt.c
CommitLineData
56276539
SS
1/* ssl/s3_clnt.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58/* ====================================================================
919b01cc 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
56276539
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60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111/* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
919b01cc
PA
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 */
56276539
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150
151#include <stdio.h>
152#include "ssl_locl.h"
153#include "kssl_lcl.h"
154#include <openssl/buffer.h>
155#include <openssl/rand.h>
156#include <openssl/objects.h>
157#include <openssl/evp.h>
158#include <openssl/md5.h>
672590bc
PA
159#ifdef OPENSSL_FIPS
160#include <openssl/fips.h>
161#endif
5bd86ce5 162#ifndef OPENSSL_NO_DH
56276539 163#include <openssl/dh.h>
5bd86ce5 164#endif
56276539 165#include <openssl/bn.h>
683caddb
PA
166#ifndef OPENSSL_NO_ENGINE
167#include <openssl/engine.h>
168#endif
56276539 169
919b01cc 170static const SSL_METHOD *ssl3_get_client_method(int ver);
56276539
SS
171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
919b01cc 173static const SSL_METHOD *ssl3_get_client_method(int ver)
56276539
SS
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
5bd86ce5
SS
181IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
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185
186int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
919b01cc 189 unsigned long Time=(unsigned long)time(NULL);
56276539
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190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
75607dda 192 int new_state,state,skip=0;
56276539
SS
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
672590bc
PA
206#ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216#endif
217
56276539
SS
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
672590bc 225 s->renegotiate=1;
56276539
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226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
919b01cc 296
56276539 297 if (s->hit)
672590bc 298 {
56276539 299 s->state=SSL3_ST_CR_FINISHED_A;
672590bc
PA
300#ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306#endif
307 }
56276539
SS
308 else
309 s->state=SSL3_ST_CR_CERT_A;
310 s->init_num=0;
311 break;
312
313 case SSL3_ST_CR_CERT_A:
314 case SSL3_ST_CR_CERT_B:
e6bc27f5
PA
315#ifndef OPENSSL_NO_TLSEXT
316 ret=ssl3_check_finished(s);
317 if (ret <= 0) goto end;
318 if (ret == 2)
319 {
320 s->hit = 1;
2e6ca3d0
PA
321 if (s->tlsext_ticket_expected)
322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
323 else
324 s->state=SSL3_ST_CR_FINISHED_A;
e6bc27f5
PA
325 s->init_num=0;
326 break;
327 }
328#endif
56276539 329 /* Check if it is anon DH/ECDH */
919b01cc
PA
330 /* or PSK */
331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
56276539
SS
333 {
334 ret=ssl3_get_server_certificate(s);
335 if (ret <= 0) goto end;
2e6ca3d0
PA
336#ifndef OPENSSL_NO_TLSEXT
337 if (s->tlsext_status_expected)
338 s->state=SSL3_ST_CR_CERT_STATUS_A;
339 else
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
341 }
342 else
343 {
344 skip = 1;
345 s->state=SSL3_ST_CR_KEY_EXCH_A;
346 }
347#else
56276539
SS
348 }
349 else
350 skip=1;
2e6ca3d0 351
56276539 352 s->state=SSL3_ST_CR_KEY_EXCH_A;
2e6ca3d0 353#endif
56276539
SS
354 s->init_num=0;
355 break;
356
357 case SSL3_ST_CR_KEY_EXCH_A:
358 case SSL3_ST_CR_KEY_EXCH_B:
359 ret=ssl3_get_key_exchange(s);
360 if (ret <= 0) goto end;
361 s->state=SSL3_ST_CR_CERT_REQ_A;
362 s->init_num=0;
363
364 /* at this point we check that we have the
365 * required stuff from the server */
366 if (!ssl3_check_cert_and_algorithm(s))
367 {
368 ret= -1;
369 goto end;
370 }
371 break;
372
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret=ssl3_get_certificate_request(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_SRVR_DONE_A;
378 s->init_num=0;
379 break;
380
381 case SSL3_ST_CR_SRVR_DONE_A:
382 case SSL3_ST_CR_SRVR_DONE_B:
383 ret=ssl3_get_server_done(s);
384 if (ret <= 0) goto end;
672590bc
PA
385#ifndef OPENSSL_NO_SRP
386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
387 {
388 if ((ret = SRP_Calc_A_param(s))<=0)
389 {
390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
392 goto end;
393 }
394 }
395#endif
56276539
SS
396 if (s->s3->tmp.cert_req)
397 s->state=SSL3_ST_CW_CERT_A;
398 else
399 s->state=SSL3_ST_CW_KEY_EXCH_A;
400 s->init_num=0;
401
402 break;
403
404 case SSL3_ST_CW_CERT_A:
405 case SSL3_ST_CW_CERT_B:
406 case SSL3_ST_CW_CERT_C:
407 case SSL3_ST_CW_CERT_D:
408 ret=ssl3_send_client_certificate(s);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_CW_KEY_EXCH_A;
411 s->init_num=0;
412 break;
413
414 case SSL3_ST_CW_KEY_EXCH_A:
415 case SSL3_ST_CW_KEY_EXCH_B:
416 ret=ssl3_send_client_key_exchange(s);
417 if (ret <= 0) goto end;
56276539
SS
418 /* EAY EAY EAY need to check for DH fix cert
419 * sent back */
420 /* For TLS, cert_req is set to 2, so a cert chain
421 * of nothing is sent, but no verify packet is sent */
422 /* XXX: For now, we do not support client
423 * authentication in ECDH cipher suites with
424 * ECDH (rather than ECDSA) certificates.
425 * We need to skip the certificate verify
426 * message when client's ECDH public key is sent
427 * inside the client certificate.
428 */
429 if (s->s3->tmp.cert_req == 1)
430 {
431 s->state=SSL3_ST_CW_CERT_VRFY_A;
432 }
433 else
434 {
435 s->state=SSL3_ST_CW_CHANGE_A;
436 s->s3->change_cipher_spec=0;
437 }
919b01cc
PA
438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
439 {
440 s->state=SSL3_ST_CW_CHANGE_A;
441 s->s3->change_cipher_spec=0;
442 }
56276539
SS
443
444 s->init_num=0;
445 break;
446
447 case SSL3_ST_CW_CERT_VRFY_A:
448 case SSL3_ST_CW_CERT_VRFY_B:
449 ret=ssl3_send_client_verify(s);
450 if (ret <= 0) goto end;
451 s->state=SSL3_ST_CW_CHANGE_A;
452 s->init_num=0;
453 s->s3->change_cipher_spec=0;
454 break;
455
456 case SSL3_ST_CW_CHANGE_A:
457 case SSL3_ST_CW_CHANGE_B:
458 ret=ssl3_send_change_cipher_spec(s,
459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
460 if (ret <= 0) goto end;
672590bc 461
672590bc 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
56276539 463 s->state=SSL3_ST_CW_FINISHED_A;
672590bc
PA
464#else
465 if (s->s3->next_proto_neg_seen)
466 s->state=SSL3_ST_CW_NEXT_PROTO_A;
467 else
468 s->state=SSL3_ST_CW_FINISHED_A;
469#endif
56276539
SS
470 s->init_num=0;
471
472 s->session->cipher=s->s3->tmp.new_cipher;
5bd86ce5
SS
473#ifdef OPENSSL_NO_COMP
474 s->session->compress_meth=0;
475#else
56276539
SS
476 if (s->s3->tmp.new_compression == NULL)
477 s->session->compress_meth=0;
478 else
479 s->session->compress_meth=
480 s->s3->tmp.new_compression->id;
5bd86ce5 481#endif
56276539
SS
482 if (!s->method->ssl3_enc->setup_key_block(s))
483 {
484 ret= -1;
485 goto end;
486 }
487
488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
490 {
491 ret= -1;
492 goto end;
493 }
494
495 break;
496
672590bc
PA
497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
498 case SSL3_ST_CW_NEXT_PROTO_A:
499 case SSL3_ST_CW_NEXT_PROTO_B:
500 ret=ssl3_send_next_proto(s);
501 if (ret <= 0) goto end;
502 s->state=SSL3_ST_CW_FINISHED_A;
503 break;
504#endif
505
56276539
SS
506 case SSL3_ST_CW_FINISHED_A:
507 case SSL3_ST_CW_FINISHED_B:
508 ret=ssl3_send_finished(s,
509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
510 s->method->ssl3_enc->client_finished_label,
511 s->method->ssl3_enc->client_finished_label_len);
512 if (ret <= 0) goto end;
513 s->state=SSL3_ST_CW_FLUSH;
514
515 /* clear flags */
516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
517 if (s->hit)
518 {
519 s->s3->tmp.next_state=SSL_ST_OK;
520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
521 {
522 s->state=SSL_ST_OK;
523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
524 s->s3->delay_buf_pop_ret=0;
525 }
526 }
527 else
528 {
e6bc27f5
PA
529#ifndef OPENSSL_NO_TLSEXT
530 /* Allow NewSessionTicket if ticket expected */
531 if (s->tlsext_ticket_expected)
532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
533 else
534#endif
535
56276539
SS
536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
537 }
538 s->init_num=0;
539 break;
540
e6bc27f5
PA
541#ifndef OPENSSL_NO_TLSEXT
542 case SSL3_ST_CR_SESSION_TICKET_A:
543 case SSL3_ST_CR_SESSION_TICKET_B:
544 ret=ssl3_get_new_session_ticket(s);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CR_FINISHED_A;
547 s->init_num=0;
548 break;
2e6ca3d0
PA
549
550 case SSL3_ST_CR_CERT_STATUS_A:
551 case SSL3_ST_CR_CERT_STATUS_B:
552 ret=ssl3_get_cert_status(s);
553 if (ret <= 0) goto end;
554 s->state=SSL3_ST_CR_KEY_EXCH_A;
555 s->init_num=0;
556 break;
e6bc27f5
PA
557#endif
558
56276539
SS
559 case SSL3_ST_CR_FINISHED_A:
560 case SSL3_ST_CR_FINISHED_B:
561
4bb195ec 562 s->s3->flags |= SSL3_FLAGS_CCS_OK;
56276539
SS
563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
564 SSL3_ST_CR_FINISHED_B);
565 if (ret <= 0) goto end;
566
567 if (s->hit)
568 s->state=SSL3_ST_CW_CHANGE_A;
569 else
570 s->state=SSL_ST_OK;
571 s->init_num=0;
572 break;
573
574 case SSL3_ST_CW_FLUSH:
5f042374
PA
575 s->rwstate=SSL_WRITING;
576 if (BIO_flush(s->wbio) <= 0)
56276539 577 {
5f042374
PA
578 ret= -1;
579 goto end;
56276539 580 }
5f042374 581 s->rwstate=SSL_NOTHING;
56276539
SS
582 s->state=s->s3->tmp.next_state;
583 break;
584
585 case SSL_ST_OK:
586 /* clean a few things up */
587 ssl3_cleanup_key_block(s);
588
589 if (s->init_buf != NULL)
590 {
591 BUF_MEM_free(s->init_buf);
592 s->init_buf=NULL;
593 }
594
595 /* If we are not 'joining' the last two packets,
596 * remove the buffering now */
597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
598 ssl_free_wbio_buffer(s);
599 /* else do it later in ssl3_write */
600
601 s->init_num=0;
672590bc 602 s->renegotiate=0;
56276539
SS
603 s->new_session=0;
604
605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
606 if (s->hit) s->ctx->stats.sess_hit++;
607
608 ret=1;
609 /* s->server=0; */
610 s->handshake_func=ssl3_connect;
611 s->ctx->stats.sess_connect_good++;
612
613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
614
615 goto end;
616 /* break; */
617
618 default:
619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
620 ret= -1;
621 goto end;
622 /* break; */
623 }
624
625 /* did we do anything */
626 if (!s->s3->tmp.reuse_message && !skip)
627 {
628 if (s->debug)
629 {
630 if ((ret=BIO_flush(s->wbio)) <= 0)
631 goto end;
632 }
633
634 if ((cb != NULL) && (s->state != state))
635 {
636 new_state=s->state;
637 s->state=state;
638 cb(s,SSL_CB_CONNECT_LOOP,1);
639 s->state=new_state;
640 }
641 }
642 skip=0;
643 }
644end:
645 s->in_handshake--;
646 if (buf != NULL)
647 BUF_MEM_free(buf);
648 if (cb != NULL)
649 cb(s,SSL_CB_CONNECT_EXIT,ret);
650 return(ret);
651 }
652
653
654int ssl3_client_hello(SSL *s)
655 {
656 unsigned char *buf;
657 unsigned char *p,*d;
5bd86ce5 658 int i;
8b433ce3 659 unsigned long l;
5bd86ce5
SS
660#ifndef OPENSSL_NO_COMP
661 int j;
56276539 662 SSL_COMP *comp;
5bd86ce5 663#endif
56276539
SS
664
665 buf=(unsigned char *)s->init_buf->data;
666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
667 {
5f042374
PA
668 SSL_SESSION *sess = s->session;
669 if ((sess == NULL) ||
670 (sess->ssl_version != s->version) ||
671#ifdef OPENSSL_NO_TLSEXT
672 !sess->session_id_length ||
673#else
674 (!sess->session_id_length && !sess->tlsext_tick) ||
675#endif
676 (sess->not_resumable))
56276539
SS
677 {
678 if (!ssl_get_new_session(s,0))
679 goto err;
680 }
681 /* else use the pre-loaded session */
682
683 p=s->s3->client_random;
8b433ce3
PA
684
685 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
56276539
SS
686 goto err;
687
688 /* Do the message type and length last */
689 d=p= &(buf[4]);
690
672590bc
PA
691 /* version indicates the negotiated version: for example from
692 * an SSLv2/v3 compatible client hello). The client_version
693 * field is the maximum version we permit and it is also
694 * used in RSA encrypted premaster secrets. Some servers can
695 * choke if we initially report a higher version then
696 * renegotiate to a lower one in the premaster secret. This
697 * didn't happen with TLS 1.0 as most servers supported it
698 * but it can with TLS 1.1 or later if the server only supports
699 * 1.0.
700 *
701 * Possible scenario with previous logic:
702 * 1. Client hello indicates TLS 1.2
703 * 2. Server hello says TLS 1.0
704 * 3. RSA encrypted premaster secret uses 1.2.
705 * 4. Handhaked proceeds using TLS 1.0.
706 * 5. Server sends hello request to renegotiate.
707 * 6. Client hello indicates TLS v1.0 as we now
708 * know that is maximum server supports.
709 * 7. Server chokes on RSA encrypted premaster secret
710 * containing version 1.0.
711 *
712 * For interoperability it should be OK to always use the
713 * maximum version we support in client hello and then rely
714 * on the checking of version to ensure the servers isn't
715 * being inconsistent: for example initially negotiating with
716 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
717 * client_version in client hello and not resetting it to
718 * the negotiated version.
719 */
720#if 0
56276539
SS
721 *(p++)=s->version>>8;
722 *(p++)=s->version&0xff;
723 s->client_version=s->version;
672590bc
PA
724#else
725 *(p++)=s->client_version>>8;
726 *(p++)=s->client_version&0xff;
727#endif
56276539
SS
728
729 /* Random stuff */
730 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
731 p+=SSL3_RANDOM_SIZE;
732
733 /* Session ID */
734 if (s->new_session)
735 i=0;
736 else
737 i=s->session->session_id_length;
738 *(p++)=i;
739 if (i != 0)
740 {
741 if (i > (int)sizeof(s->session->session_id))
742 {
743 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
744 goto err;
745 }
746 memcpy(p,s->session->session_id,i);
747 p+=i;
748 }
749
750 /* Ciphers supported */
751 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
752 if (i == 0)
753 {
754 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
755 goto err;
756 }
503f6d4b
PA
757#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
758 /* Some servers hang if client hello > 256 bytes
759 * as hack workaround chop number of supported ciphers
760 * to keep it well below this if we use TLS v1.2
761 */
762 if (TLS1_get_version(s) >= TLS1_2_VERSION
763 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
764 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
765#endif
56276539
SS
766 s2n(i,p);
767 p+=i;
768
769 /* COMPRESSION */
5bd86ce5
SS
770#ifdef OPENSSL_NO_COMP
771 *(p++)=1;
772#else
919b01cc
PA
773
774 if ((s->options & SSL_OP_NO_COMPRESSION)
775 || !s->ctx->comp_methods)
56276539
SS
776 j=0;
777 else
778 j=sk_SSL_COMP_num(s->ctx->comp_methods);
779 *(p++)=1+j;
780 for (i=0; i<j; i++)
781 {
782 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
783 *(p++)=comp->id;
784 }
5bd86ce5 785#endif
56276539 786 *(p++)=0; /* Add the NULL method */
919b01cc 787
e6bc27f5 788#ifndef OPENSSL_NO_TLSEXT
919b01cc
PA
789 /* TLS extensions*/
790 if (ssl_prepare_clienthello_tlsext(s) <= 0)
791 {
792 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
793 goto err;
794 }
e6bc27f5
PA
795 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
796 {
797 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
798 goto err;
799 }
919b01cc
PA
800#endif
801
56276539
SS
802 l=(p-d);
803 d=buf;
804 *(d++)=SSL3_MT_CLIENT_HELLO;
805 l2n3(l,d);
806
807 s->state=SSL3_ST_CW_CLNT_HELLO_B;
808 /* number of bytes to write */
809 s->init_num=p-buf;
810 s->init_off=0;
811 }
812
813 /* SSL3_ST_CW_CLNT_HELLO_B */
814 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
815err:
816 return(-1);
817 }
818
819int ssl3_get_server_hello(SSL *s)
820 {
821 STACK_OF(SSL_CIPHER) *sk;
919b01cc 822 const SSL_CIPHER *c;
56276539
SS
823 unsigned char *p,*d;
824 int i,al,ok;
825 unsigned int j;
826 long n;
5bd86ce5 827#ifndef OPENSSL_NO_COMP
56276539 828 SSL_COMP *comp;
5bd86ce5 829#endif
56276539
SS
830
831 n=s->method->ssl_get_message(s,
832 SSL3_ST_CR_SRVR_HELLO_A,
833 SSL3_ST_CR_SRVR_HELLO_B,
834 -1,
e6bc27f5 835 20000, /* ?? */
56276539
SS
836 &ok);
837
838 if (!ok) return((int)n);
839
5f042374 840 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
56276539
SS
841 {
842 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
843 {
844 if ( s->d1->send_cookie == 0)
845 {
846 s->s3->tmp.reuse_message = 1;
847 return 1;
848 }
849 else /* already sent a cookie */
850 {
851 al=SSL_AD_UNEXPECTED_MESSAGE;
852 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
853 goto f_err;
854 }
855 }
856 }
857
858 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
859 {
860 al=SSL_AD_UNEXPECTED_MESSAGE;
861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
862 goto f_err;
863 }
864
865 d=p=(unsigned char *)s->init_msg;
866
867 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
868 {
869 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
870 s->version=(s->version&0xff00)|p[1];
871 al=SSL_AD_PROTOCOL_VERSION;
872 goto f_err;
873 }
874 p+=2;
875
876 /* load the server hello data */
877 /* load the server random */
878 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
879 p+=SSL3_RANDOM_SIZE;
880
881 /* get the session-id */
882 j= *(p++);
883
884 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
885 {
886 al=SSL_AD_ILLEGAL_PARAMETER;
887 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
888 goto f_err;
889 }
890
919b01cc
PA
891#ifndef OPENSSL_NO_TLSEXT
892 /* check if we want to resume the session based on external pre-shared secret */
893 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
894 {
895 SSL_CIPHER *pref_cipher=NULL;
896 s->session->master_key_length=sizeof(s->session->master_key);
897 if (s->tls_session_secret_cb(s, s->session->master_key,
898 &s->session->master_key_length,
899 NULL, &pref_cipher,
900 s->tls_session_secret_cb_arg))
901 {
902 s->session->cipher = pref_cipher ?
903 pref_cipher : ssl_get_cipher_by_char(s, p+j);
904 }
905 }
906#endif /* OPENSSL_NO_TLSEXT */
907
56276539
SS
908 if (j != 0 && j == s->session->session_id_length
909 && memcmp(p,s->session->session_id,j) == 0)
910 {
911 if(s->sid_ctx_length != s->session->sid_ctx_length
912 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
913 {
914 /* actually a client application bug */
915 al=SSL_AD_ILLEGAL_PARAMETER;
916 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
917 goto f_err;
918 }
4bb195ec 919 s->s3->flags |= SSL3_FLAGS_CCS_OK;
56276539
SS
920 s->hit=1;
921 }
922 else /* a miss or crap from the other end */
923 {
924 /* If we were trying for session-id reuse, make a new
925 * SSL_SESSION so we don't stuff up other people */
926 s->hit=0;
927 if (s->session->session_id_length > 0)
928 {
929 if (!ssl_get_new_session(s,0))
930 {
931 al=SSL_AD_INTERNAL_ERROR;
932 goto f_err;
933 }
934 }
935 s->session->session_id_length=j;
936 memcpy(s->session->session_id,p,j); /* j could be 0 */
937 }
938 p+=j;
939 c=ssl_get_cipher_by_char(s,p);
940 if (c == NULL)
941 {
942 /* unknown cipher */
943 al=SSL_AD_ILLEGAL_PARAMETER;
944 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
945 goto f_err;
946 }
672590bc
PA
947 /* TLS v1.2 only ciphersuites require v1.2 or later */
948 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
949 (TLS1_get_version(s) < TLS1_2_VERSION))
950 {
951 al=SSL_AD_ILLEGAL_PARAMETER;
952 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
953 goto f_err;
954 }
56276539
SS
955 p+=ssl_put_cipher_by_char(s,NULL,NULL);
956
957 sk=ssl_get_ciphers_by_id(s);
958 i=sk_SSL_CIPHER_find(sk,c);
959 if (i < 0)
960 {
961 /* we did not say we would use this cipher */
962 al=SSL_AD_ILLEGAL_PARAMETER;
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
964 goto f_err;
965 }
966
967 /* Depending on the session caching (internal/external), the cipher
968 and/or cipher_id values may not be set. Make sure that
969 cipher_id is set and use it for comparison. */
970 if (s->session->cipher)
971 s->session->cipher_id = s->session->cipher->id;
972 if (s->hit && (s->session->cipher_id != c->id))
973 {
ea552218
PA
974/* Workaround is now obsolete */
975#if 0
56276539
SS
976 if (!(s->options &
977 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
ea552218 978#endif
56276539
SS
979 {
980 al=SSL_AD_ILLEGAL_PARAMETER;
981 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
982 goto f_err;
983 }
984 }
985 s->s3->tmp.new_cipher=c;
672590bc
PA
986 /* Don't digest cached records if TLS v1.2: we may need them for
987 * client authentication.
988 */
989 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
ec1df3a8
PA
990 {
991 al = SSL_AD_INTERNAL_ERROR;
919b01cc 992 goto f_err;
ec1df3a8 993 }
56276539
SS
994 /* lets get the compression algorithm */
995 /* COMPRESSION */
5bd86ce5
SS
996#ifdef OPENSSL_NO_COMP
997 if (*(p++) != 0)
998 {
999 al=SSL_AD_ILLEGAL_PARAMETER;
1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1001 goto f_err;
1002 }
919b01cc
PA
1003 /* If compression is disabled we'd better not try to resume a session
1004 * using compression.
1005 */
1006 if (s->session->compress_meth != 0)
1007 {
1008 al=SSL_AD_INTERNAL_ERROR;
1009 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1010 goto f_err;
1011 }
5bd86ce5 1012#else
56276539 1013 j= *(p++);
919b01cc
PA
1014 if (s->hit && j != s->session->compress_meth)
1015 {
1016 al=SSL_AD_ILLEGAL_PARAMETER;
1017 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1018 goto f_err;
1019 }
56276539
SS
1020 if (j == 0)
1021 comp=NULL;
919b01cc
PA
1022 else if (s->options & SSL_OP_NO_COMPRESSION)
1023 {
1024 al=SSL_AD_ILLEGAL_PARAMETER;
1025 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1026 goto f_err;
1027 }
56276539
SS
1028 else
1029 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1030
1031 if ((j != 0) && (comp == NULL))
1032 {
1033 al=SSL_AD_ILLEGAL_PARAMETER;
1034 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1035 goto f_err;
1036 }
1037 else
1038 {
1039 s->s3->tmp.new_compression=comp;
1040 }
5bd86ce5 1041#endif
919b01cc 1042
e6bc27f5
PA
1043#ifndef OPENSSL_NO_TLSEXT
1044 /* TLS extensions*/
5f042374 1045 if (s->version >= SSL3_VERSION)
e6bc27f5
PA
1046 {
1047 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1048 {
1049 /* 'al' set by ssl_parse_serverhello_tlsext */
1050 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1051 goto f_err;
1052 }
1053 if (ssl_check_serverhello_tlsext(s) <= 0)
1054 {
1055 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1056 goto err;
1057 }
1058 }
1059#endif
1060
56276539
SS
1061 if (p != (d+n))
1062 {
1063 /* wrong packet length */
1064 al=SSL_AD_DECODE_ERROR;
1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
9e80567f 1066 goto f_err;
56276539
SS
1067 }
1068
1069 return(1);
1070f_err:
1071 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1072err:
1073 return(-1);
1074 }
1075
1076int ssl3_get_server_certificate(SSL *s)
1077 {
1078 int al,i,ok,ret= -1;
1079 unsigned long n,nc,llen,l;
1080 X509 *x=NULL;
1081 const unsigned char *q,*p;
1082 unsigned char *d;
1083 STACK_OF(X509) *sk=NULL;
1084 SESS_CERT *sc;
1085 EVP_PKEY *pkey=NULL;
1086 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1087
1088 n=s->method->ssl_get_message(s,
1089 SSL3_ST_CR_CERT_A,
1090 SSL3_ST_CR_CERT_B,
1091 -1,
1092 s->max_cert_list,
1093 &ok);
1094
1095 if (!ok) return((int)n);
1096
e6bc27f5 1097 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
919b01cc 1098 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
e6bc27f5 1099 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
56276539
SS
1100 {
1101 s->s3->tmp.reuse_message=1;
1102 return(1);
1103 }
1104
1105 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1106 {
1107 al=SSL_AD_UNEXPECTED_MESSAGE;
1108 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1109 goto f_err;
1110 }
1111 p=d=(unsigned char *)s->init_msg;
1112
1113 if ((sk=sk_X509_new_null()) == NULL)
1114 {
1115 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1116 goto err;
1117 }
1118
1119 n2l3(p,llen);
1120 if (llen+3 != n)
1121 {
1122 al=SSL_AD_DECODE_ERROR;
1123 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1124 goto f_err;
1125 }
1126 for (nc=0; nc<llen; )
1127 {
1128 n2l3(p,l);
1129 if ((l+nc+3) > llen)
1130 {
1131 al=SSL_AD_DECODE_ERROR;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1133 goto f_err;
1134 }
1135
1136 q=p;
1137 x=d2i_X509(NULL,&q,l);
1138 if (x == NULL)
1139 {
1140 al=SSL_AD_BAD_CERTIFICATE;
1141 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1142 goto f_err;
1143 }
1144 if (q != (p+l))
1145 {
1146 al=SSL_AD_DECODE_ERROR;
1147 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1148 goto f_err;
1149 }
1150 if (!sk_X509_push(sk,x))
1151 {
1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1153 goto err;
1154 }
1155 x=NULL;
1156 nc+=l+3;
1157 p=q;
1158 }
1159
1160 i=ssl_verify_cert_chain(s,sk);
730b1645 1161 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
56276539 1162#ifndef OPENSSL_NO_KRB5
919b01cc
PA
1163 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1164 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
56276539 1165#endif /* OPENSSL_NO_KRB5 */
919b01cc 1166 )
56276539
SS
1167 {
1168 al=ssl_verify_alarm_type(s->verify_result);
1169 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1170 goto f_err;
1171 }
1172 ERR_clear_error(); /* but we keep s->verify_result */
1173
1174 sc=ssl_sess_cert_new();
1175 if (sc == NULL) goto err;
1176
1177 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1178 s->session->sess_cert=sc;
1179
1180 sc->cert_chain=sk;
1181 /* Inconsistency alert: cert_chain does include the peer's
1182 * certificate, which we don't include in s3_srvr.c */
1183 x=sk_X509_value(sk,0);
1184 sk=NULL;
1185 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1186
1187 pkey=X509_get_pubkey(x);
1188
1189 /* VRS: allow null cert if auth == KRB5 */
919b01cc
PA
1190 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1191 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1192 ? 0 : 1;
56276539
SS
1193
1194#ifdef KSSL_DEBUG
919b01cc 1195 printf("pkey,x = %p, %p\n", pkey,x);
56276539 1196 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
919b01cc
PA
1197 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1198 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
56276539
SS
1199#endif /* KSSL_DEBUG */
1200
1201 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1202 {
1203 x=NULL;
1204 al=SSL3_AL_FATAL;
1205 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1206 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1207 goto f_err;
1208 }
1209
1210 i=ssl_cert_type(x,pkey);
1211 if (need_cert && i < 0)
1212 {
1213 x=NULL;
1214 al=SSL3_AL_FATAL;
1215 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1216 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1217 goto f_err;
1218 }
1219
1220 if (need_cert)
1221 {
1222 sc->peer_cert_type=i;
1223 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1224 /* Why would the following ever happen?
1225 * We just created sc a couple of lines ago. */
1226 if (sc->peer_pkeys[i].x509 != NULL)
1227 X509_free(sc->peer_pkeys[i].x509);
1228 sc->peer_pkeys[i].x509=x;
1229 sc->peer_key= &(sc->peer_pkeys[i]);
1230
1231 if (s->session->peer != NULL)
1232 X509_free(s->session->peer);
1233 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1234 s->session->peer=x;
1235 }
1236 else
1237 {
1238 sc->peer_cert_type=i;
1239 sc->peer_key= NULL;
1240
1241 if (s->session->peer != NULL)
1242 X509_free(s->session->peer);
1243 s->session->peer=NULL;
1244 }
1245 s->session->verify_result = s->verify_result;
1246
1247 x=NULL;
1248 ret=1;
1249
1250 if (0)
1251 {
1252f_err:
1253 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1254 }
1255err:
1256 EVP_PKEY_free(pkey);
1257 X509_free(x);
1258 sk_X509_pop_free(sk,X509_free);
1259 return(ret);
1260 }
1261
1262int ssl3_get_key_exchange(SSL *s)
1263 {
1264#ifndef OPENSSL_NO_RSA
1265 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1266#endif
1267 EVP_MD_CTX md_ctx;
1268 unsigned char *param,*p;
1269 int al,i,j,param_len,ok;
919b01cc 1270 long n,alg_k,alg_a;
56276539 1271 EVP_PKEY *pkey=NULL;
672590bc 1272 const EVP_MD *md = NULL;
56276539
SS
1273#ifndef OPENSSL_NO_RSA
1274 RSA *rsa=NULL;
1275#endif
1276#ifndef OPENSSL_NO_DH
1277 DH *dh=NULL;
1278#endif
1279#ifndef OPENSSL_NO_ECDH
1280 EC_KEY *ecdh = NULL;
1281 BN_CTX *bn_ctx = NULL;
1282 EC_POINT *srvr_ecpoint = NULL;
1283 int curve_nid = 0;
1284 int encoded_pt_len = 0;
1285#endif
1286
1287 /* use same message size as in ssl3_get_certificate_request()
1288 * as ServerKeyExchange message may be skipped */
1289 n=s->method->ssl_get_message(s,
1290 SSL3_ST_CR_KEY_EXCH_A,
1291 SSL3_ST_CR_KEY_EXCH_B,
1292 -1,
1293 s->max_cert_list,
1294 &ok);
56276539
SS
1295 if (!ok) return((int)n);
1296
1297 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1298 {
919b01cc
PA
1299#ifndef OPENSSL_NO_PSK
1300 /* In plain PSK ciphersuite, ServerKeyExchange can be
1301 omitted if no identity hint is sent. Set
1302 session->sess_cert anyway to avoid problems
1303 later.*/
1304 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1305 {
1306 s->session->sess_cert=ssl_sess_cert_new();
1307 if (s->ctx->psk_identity_hint)
1308 OPENSSL_free(s->ctx->psk_identity_hint);
1309 s->ctx->psk_identity_hint = NULL;
1310 }
1311#endif
56276539
SS
1312 s->s3->tmp.reuse_message=1;
1313 return(1);
1314 }
1315
1316 param=p=(unsigned char *)s->init_msg;
56276539
SS
1317 if (s->session->sess_cert != NULL)
1318 {
1319#ifndef OPENSSL_NO_RSA
1320 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1321 {
1322 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1323 s->session->sess_cert->peer_rsa_tmp=NULL;
1324 }
1325#endif
1326#ifndef OPENSSL_NO_DH
1327 if (s->session->sess_cert->peer_dh_tmp)
1328 {
1329 DH_free(s->session->sess_cert->peer_dh_tmp);
1330 s->session->sess_cert->peer_dh_tmp=NULL;
1331 }
1332#endif
1333#ifndef OPENSSL_NO_ECDH
1334 if (s->session->sess_cert->peer_ecdh_tmp)
1335 {
1336 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1337 s->session->sess_cert->peer_ecdh_tmp=NULL;
1338 }
1339#endif
1340 }
1341 else
1342 {
1343 s->session->sess_cert=ssl_sess_cert_new();
1344 }
1345
1346 param_len=0;
919b01cc
PA
1347 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1348 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
56276539
SS
1349 EVP_MD_CTX_init(&md_ctx);
1350
919b01cc
PA
1351#ifndef OPENSSL_NO_PSK
1352 if (alg_k & SSL_kPSK)
1353 {
1354 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1355
1356 al=SSL_AD_HANDSHAKE_FAILURE;
1357 n2s(p,i);
1358 param_len=i+2;
1359 /* Store PSK identity hint for later use, hint is used
1360 * in ssl3_send_client_key_exchange. Assume that the
1361 * maximum length of a PSK identity hint can be as
1362 * long as the maximum length of a PSK identity. */
1363 if (i > PSK_MAX_IDENTITY_LEN)
1364 {
1365 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1366 SSL_R_DATA_LENGTH_TOO_LONG);
1367 goto f_err;
1368 }
1369 if (param_len > n)
1370 {
1371 al=SSL_AD_DECODE_ERROR;
1372 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1373 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1374 goto f_err;
1375 }
1376 /* If received PSK identity hint contains NULL
1377 * characters, the hint is truncated from the first
1378 * NULL. p may not be ending with NULL, so create a
1379 * NULL-terminated string. */
1380 memcpy(tmp_id_hint, p, i);
1381 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1382 if (s->ctx->psk_identity_hint != NULL)
1383 OPENSSL_free(s->ctx->psk_identity_hint);
1384 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1385 if (s->ctx->psk_identity_hint == NULL)
1386 {
1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1388 goto f_err;
1389 }
1390
1391 p+=i;
1392 n-=param_len;
1393 }
1394 else
1395#endif /* !OPENSSL_NO_PSK */
672590bc
PA
1396#ifndef OPENSSL_NO_SRP
1397 if (alg_k & SSL_kSRP)
1398 {
1399 n2s(p,i);
1400 param_len=i+2;
1401 if (param_len > n)
1402 {
1403 al=SSL_AD_DECODE_ERROR;
1404 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1405 goto f_err;
1406 }
1407 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1408 {
1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1410 goto err;
1411 }
1412 p+=i;
1413
1414 n2s(p,i);
1415 param_len+=i+2;
1416 if (param_len > n)
1417 {
1418 al=SSL_AD_DECODE_ERROR;
1419 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1420 goto f_err;
1421 }
1422 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1423 {
1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1425 goto err;
1426 }
1427 p+=i;
1428
1429 i = (unsigned int)(p[0]);
1430 p++;
1431 param_len+=i+1;
1432 if (param_len > n)
1433 {
1434 al=SSL_AD_DECODE_ERROR;
1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1436 goto f_err;
1437 }
1438 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1439 {
1440 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1441 goto err;
1442 }
1443 p+=i;
1444
1445 n2s(p,i);
1446 param_len+=i+2;
1447 if (param_len > n)
1448 {
1449 al=SSL_AD_DECODE_ERROR;
1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1451 goto f_err;
1452 }
1453 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1454 {
1455 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1456 goto err;
1457 }
1458 p+=i;
1459 n-=param_len;
1460
1461/* We must check if there is a certificate */
1462#ifndef OPENSSL_NO_RSA
1463 if (alg_a & SSL_aRSA)
1464 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1465#else
1466 if (0)
1467 ;
1468#endif
1469#ifndef OPENSSL_NO_DSA
1470 else if (alg_a & SSL_aDSS)
1471 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1472#endif
1473 }
1474 else
1475#endif /* !OPENSSL_NO_SRP */
56276539 1476#ifndef OPENSSL_NO_RSA
919b01cc 1477 if (alg_k & SSL_kRSA)
56276539
SS
1478 {
1479 if ((rsa=RSA_new()) == NULL)
1480 {
1481 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1482 goto err;
1483 }
1484 n2s(p,i);
1485 param_len=i+2;
1486 if (param_len > n)
1487 {
1488 al=SSL_AD_DECODE_ERROR;
1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1490 goto f_err;
1491 }
1492 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1493 {
1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1495 goto err;
1496 }
1497 p+=i;
1498
1499 n2s(p,i);
1500 param_len+=i+2;
1501 if (param_len > n)
1502 {
1503 al=SSL_AD_DECODE_ERROR;
1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1505 goto f_err;
1506 }
1507 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1508 {
1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1510 goto err;
1511 }
1512 p+=i;
1513 n-=param_len;
1514
1515 /* this should be because we are using an export cipher */
919b01cc 1516 if (alg_a & SSL_aRSA)
56276539
SS
1517 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1518 else
1519 {
1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1521 goto err;
1522 }
1523 s->session->sess_cert->peer_rsa_tmp=rsa;
1524 rsa=NULL;
1525 }
1526#else /* OPENSSL_NO_RSA */
1527 if (0)
1528 ;
1529#endif
1530#ifndef OPENSSL_NO_DH
919b01cc 1531 else if (alg_k & SSL_kEDH)
56276539
SS
1532 {
1533 if ((dh=DH_new()) == NULL)
1534 {
1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1536 goto err;
1537 }
1538 n2s(p,i);
1539 param_len=i+2;
1540 if (param_len > n)
1541 {
1542 al=SSL_AD_DECODE_ERROR;
1543 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1544 goto f_err;
1545 }
1546 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1547 {
1548 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1549 goto err;
1550 }
1551 p+=i;
1552
1553 n2s(p,i);
1554 param_len+=i+2;
1555 if (param_len > n)
1556 {
1557 al=SSL_AD_DECODE_ERROR;
1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1559 goto f_err;
1560 }
1561 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1562 {
1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1564 goto err;
1565 }
1566 p+=i;
1567
1568 n2s(p,i);
1569 param_len+=i+2;
1570 if (param_len > n)
1571 {
1572 al=SSL_AD_DECODE_ERROR;
1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1574 goto f_err;
1575 }
1576 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1577 {
1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1579 goto err;
1580 }
1581 p+=i;
1582 n-=param_len;
1583
1584#ifndef OPENSSL_NO_RSA
919b01cc 1585 if (alg_a & SSL_aRSA)
56276539
SS
1586 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1587#else
1588 if (0)
1589 ;
1590#endif
1591#ifndef OPENSSL_NO_DSA
919b01cc 1592 else if (alg_a & SSL_aDSS)
56276539
SS
1593 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1594#endif
1595 /* else anonymous DH, so no certificate or pkey. */
1596
1597 s->session->sess_cert->peer_dh_tmp=dh;
1598 dh=NULL;
1599 }
919b01cc 1600 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
56276539
SS
1601 {
1602 al=SSL_AD_ILLEGAL_PARAMETER;
1603 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1604 goto f_err;
1605 }
1606#endif /* !OPENSSL_NO_DH */
1607
1608#ifndef OPENSSL_NO_ECDH
919b01cc 1609 else if (alg_k & SSL_kEECDH)
56276539
SS
1610 {
1611 EC_GROUP *ngroup;
1612 const EC_GROUP *group;
1613
1614 if ((ecdh=EC_KEY_new()) == NULL)
1615 {
1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1617 goto err;
1618 }
1619
1620 /* Extract elliptic curve parameters and the
1621 * server's ephemeral ECDH public key.
1622 * Keep accumulating lengths of various components in
1623 * param_len and make sure it never exceeds n.
1624 */
1625
1626 /* XXX: For now we only support named (not generic) curves
74093195 1627 * and the ECParameters in this case is just three bytes.
56276539 1628 */
74093195 1629 param_len=3;
56276539
SS
1630 if ((param_len > n) ||
1631 (*p != NAMED_CURVE_TYPE) ||
919b01cc 1632 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
56276539
SS
1633 {
1634 al=SSL_AD_INTERNAL_ERROR;
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1636 goto f_err;
1637 }
1638
1639 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1640 if (ngroup == NULL)
1641 {
1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1643 goto err;
1644 }
1645 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1646 {
1647 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1648 goto err;
1649 }
1650 EC_GROUP_free(ngroup);
1651
1652 group = EC_KEY_get0_group(ecdh);
1653
1654 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1655 (EC_GROUP_get_degree(group) > 163))
1656 {
1657 al=SSL_AD_EXPORT_RESTRICTION;
1658 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1659 goto f_err;
1660 }
1661
74093195 1662 p+=3;
56276539
SS
1663
1664 /* Next, get the encoded ECPoint */
1665 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1666 ((bn_ctx = BN_CTX_new()) == NULL))
1667 {
1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1669 goto err;
1670 }
1671
1672 encoded_pt_len = *p; /* length of encoded point */
1673 p+=1;
1674 param_len += (1 + encoded_pt_len);
1675 if ((param_len > n) ||
1676 (EC_POINT_oct2point(group, srvr_ecpoint,
1677 p, encoded_pt_len, bn_ctx) == 0))
1678 {
1679 al=SSL_AD_DECODE_ERROR;
1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1681 goto f_err;
1682 }
1683
1684 n-=param_len;
1685 p+=encoded_pt_len;
1686
1687 /* The ECC/TLS specification does not mention
1688 * the use of DSA to sign ECParameters in the server
1689 * key exchange message. We do support RSA and ECDSA.
1690 */
1691 if (0) ;
1692#ifndef OPENSSL_NO_RSA
919b01cc 1693 else if (alg_a & SSL_aRSA)
56276539
SS
1694 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1695#endif
1696#ifndef OPENSSL_NO_ECDSA
919b01cc 1697 else if (alg_a & SSL_aECDSA)
56276539
SS
1698 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1699#endif
1700 /* else anonymous ECDH, so no certificate or pkey. */
1701 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1702 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1703 ecdh=NULL;
1704 BN_CTX_free(bn_ctx);
9f1859dd 1705 bn_ctx = NULL;
56276539
SS
1706 EC_POINT_free(srvr_ecpoint);
1707 srvr_ecpoint = NULL;
1708 }
919b01cc 1709 else if (alg_k)
56276539
SS
1710 {
1711 al=SSL_AD_UNEXPECTED_MESSAGE;
1712 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1713 goto f_err;
1714 }
1715#endif /* !OPENSSL_NO_ECDH */
56276539
SS
1716
1717
1718 /* p points to the next byte, there are 'n' bytes left */
1719
1720 /* if it was signed, check the signature */
1721 if (pkey != NULL)
1722 {
672590bc
PA
1723 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1724 {
1725 int sigalg = tls12_get_sigid(pkey);
1726 /* Should never happen */
1727 if (sigalg == -1)
1728 {
1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1730 goto err;
1731 }
1732 /* Check key type is consistent with signature */
1733 if (sigalg != (int)p[1])
1734 {
1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1736 al=SSL_AD_DECODE_ERROR;
1737 goto f_err;
1738 }
1739 md = tls12_get_hash(p[0]);
1740 if (md == NULL)
1741 {
1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1743 al=SSL_AD_DECODE_ERROR;
1744 goto f_err;
1745 }
1746#ifdef SSL_DEBUG
1747fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1748#endif
1749 p += 2;
1750 n -= 2;
1751 }
1752 else
1753 md = EVP_sha1();
1754
56276539
SS
1755 n2s(p,i);
1756 n-=2;
1757 j=EVP_PKEY_size(pkey);
1758
1759 if ((i != n) || (n > j) || (n <= 0))
1760 {
1761 /* wrong packet length */
1762 al=SSL_AD_DECODE_ERROR;
1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1764 goto f_err;
1765 }
1766
1767#ifndef OPENSSL_NO_RSA
672590bc 1768 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
56276539
SS
1769 {
1770 int num;
1771
1772 j=0;
1773 q=md_buf;
1774 for (num=2; num > 0; num--)
1775 {
672590bc
PA
1776 EVP_MD_CTX_set_flags(&md_ctx,
1777 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
56276539
SS
1778 EVP_DigestInit_ex(&md_ctx,(num == 2)
1779 ?s->ctx->md5:s->ctx->sha1, NULL);
1780 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1781 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1782 EVP_DigestUpdate(&md_ctx,param,param_len);
1783 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1784 q+=i;
1785 j+=i;
1786 }
1787 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1788 pkey->pkey.rsa);
1789 if (i < 0)
1790 {
1791 al=SSL_AD_DECRYPT_ERROR;
1792 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1793 goto f_err;
1794 }
1795 if (i == 0)
1796 {
1797 /* bad signature */
1798 al=SSL_AD_DECRYPT_ERROR;
1799 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1800 goto f_err;
1801 }
1802 }
1803 else
1804#endif
56276539 1805 {
672590bc 1806 EVP_VerifyInit_ex(&md_ctx, md, NULL);
56276539
SS
1807 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1808 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1809 EVP_VerifyUpdate(&md_ctx,param,param_len);
730b1645 1810 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
56276539
SS
1811 {
1812 /* bad signature */
1813 al=SSL_AD_DECRYPT_ERROR;
1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1815 goto f_err;
1816 }
1817 }
56276539
SS
1818 }
1819 else
1820 {
919b01cc
PA
1821 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1822 /* aNULL or kPSK do not need public keys */
56276539
SS
1823 {
1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1825 goto err;
1826 }
919b01cc 1827 /* still data left over */
56276539
SS
1828 if (n != 0)
1829 {
1830 al=SSL_AD_DECODE_ERROR;
1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1832 goto f_err;
1833 }
1834 }
1835 EVP_PKEY_free(pkey);
1836 EVP_MD_CTX_cleanup(&md_ctx);
1837 return(1);
1838f_err:
1839 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1840err:
1841 EVP_PKEY_free(pkey);
1842#ifndef OPENSSL_NO_RSA
1843 if (rsa != NULL)
1844 RSA_free(rsa);
1845#endif
1846#ifndef OPENSSL_NO_DH
1847 if (dh != NULL)
1848 DH_free(dh);
1849#endif
1850#ifndef OPENSSL_NO_ECDH
1851 BN_CTX_free(bn_ctx);
1852 EC_POINT_free(srvr_ecpoint);
1853 if (ecdh != NULL)
1854 EC_KEY_free(ecdh);
1855#endif
1856 EVP_MD_CTX_cleanup(&md_ctx);
1857 return(-1);
1858 }
1859
1860int ssl3_get_certificate_request(SSL *s)
1861 {
1862 int ok,ret=0;
1863 unsigned long n,nc,l;
672590bc 1864 unsigned int llen, ctype_num,i;
56276539
SS
1865 X509_NAME *xn=NULL;
1866 const unsigned char *p,*q;
1867 unsigned char *d;
1868 STACK_OF(X509_NAME) *ca_sk=NULL;
1869
1870 n=s->method->ssl_get_message(s,
1871 SSL3_ST_CR_CERT_REQ_A,
1872 SSL3_ST_CR_CERT_REQ_B,
1873 -1,
1874 s->max_cert_list,
1875 &ok);
1876
1877 if (!ok) return((int)n);
1878
1879 s->s3->tmp.cert_req=0;
1880
1881 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1882 {
1883 s->s3->tmp.reuse_message=1;
672590bc
PA
1884 /* If we get here we don't need any cached handshake records
1885 * as we wont be doing client auth.
1886 */
1887 if (s->s3->handshake_buffer)
1888 {
1889 if (!ssl3_digest_cached_records(s))
1890 goto err;
1891 }
56276539
SS
1892 return(1);
1893 }
1894
1895 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1896 {
1897 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1898 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1899 goto err;
1900 }
1901
1902 /* TLS does not like anon-DH with client cert */
1903 if (s->version > SSL3_VERSION)
1904 {
919b01cc 1905 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
56276539
SS
1906 {
1907 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1908 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1909 goto err;
1910 }
1911 }
1912
1913 p=d=(unsigned char *)s->init_msg;
1914
1915 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1916 {
1917 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1918 goto err;
1919 }
1920
1921 /* get the certificate types */
1922 ctype_num= *(p++);
1923 if (ctype_num > SSL3_CT_NUMBER)
1924 ctype_num=SSL3_CT_NUMBER;
1925 for (i=0; i<ctype_num; i++)
1926 s->s3->tmp.ctype[i]= p[i];
1927 p+=ctype_num;
672590bc
PA
1928 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1929 {
1930 n2s(p, llen);
1931 /* Check we have enough room for signature algorithms and
1932 * following length value.
1933 */
1934 if ((unsigned long)(p - d + llen + 2) > n)
1935 {
1936 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1937 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1938 goto err;
1939 }
1940 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1941 {
1942 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1943 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1944 goto err;
1945 }
1946 p += llen;
1947 }
56276539
SS
1948
1949 /* get the CA RDNs */
1950 n2s(p,llen);
1951#if 0
1952{
1953FILE *out;
1954out=fopen("/tmp/vsign.der","w");
1955fwrite(p,1,llen,out);
1956fclose(out);
1957}
1958#endif
1959
672590bc 1960 if ((unsigned long)(p - d + llen) != n)
56276539
SS
1961 {
1962 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1963 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1964 goto err;
1965 }
1966
1967 for (nc=0; nc<llen; )
1968 {
1969 n2s(p,l);
1970 if ((l+nc+2) > llen)
1971 {
1972 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1973 goto cont; /* netscape bugs */
1974 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1975 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1976 goto err;
1977 }
1978
1979 q=p;
1980
1981 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1982 {
1983 /* If netscape tolerance is on, ignore errors */
1984 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1985 goto cont;
1986 else
1987 {
1988 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1989 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1990 goto err;
1991 }
1992 }
1993
1994 if (q != (p+l))
1995 {
1996 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1997 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1998 goto err;
1999 }
2000 if (!sk_X509_NAME_push(ca_sk,xn))
2001 {
2002 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2003 goto err;
2004 }
2005
2006 p+=l;
2007 nc+=l+2;
2008 }
2009
2010 if (0)
2011 {
2012cont:
2013 ERR_clear_error();
2014 }
2015
2016 /* we should setup a certificate to return.... */
2017 s->s3->tmp.cert_req=1;
2018 s->s3->tmp.ctype_num=ctype_num;
2019 if (s->s3->tmp.ca_names != NULL)
2020 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2021 s->s3->tmp.ca_names=ca_sk;
2022 ca_sk=NULL;
2023
2024 ret=1;
2025err:
2026 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2027 return(ret);
2028 }
2029
2030static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2031 {
2032 return(X509_NAME_cmp(*a,*b));
2033 }
e6bc27f5
PA
2034#ifndef OPENSSL_NO_TLSEXT
2035int ssl3_get_new_session_ticket(SSL *s)
2036 {
2037 int ok,al,ret=0, ticklen;
2038 long n;
2039 const unsigned char *p;
2040 unsigned char *d;
2041
2042 n=s->method->ssl_get_message(s,
2043 SSL3_ST_CR_SESSION_TICKET_A,
2044 SSL3_ST_CR_SESSION_TICKET_B,
2045 -1,
2046 16384,
2047 &ok);
2048
2049 if (!ok)
2050 return((int)n);
2051
2052 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2053 {
2054 s->s3->tmp.reuse_message=1;
2055 return(1);
2056 }
2057 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2058 {
2059 al=SSL_AD_UNEXPECTED_MESSAGE;
2060 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2061 goto f_err;
2062 }
2063 if (n < 6)
2064 {
2065 /* need at least ticket_lifetime_hint + ticket length */
9e80567f 2066 al = SSL_AD_DECODE_ERROR;
e6bc27f5
PA
2067 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2068 goto f_err;
2069 }
5f042374 2070
e6bc27f5
PA
2071 p=d=(unsigned char *)s->init_msg;
2072 n2l(p, s->session->tlsext_tick_lifetime_hint);
2073 n2s(p, ticklen);
2074 /* ticket_lifetime_hint + ticket_length + ticket */
2075 if (ticklen + 6 != n)
2076 {
9e80567f 2077 al = SSL_AD_DECODE_ERROR;
2e6ca3d0 2078 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
e6bc27f5
PA
2079 goto f_err;
2080 }
2081 if (s->session->tlsext_tick)
2082 {
2083 OPENSSL_free(s->session->tlsext_tick);
2084 s->session->tlsext_ticklen = 0;
2085 }
2086 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2087 if (!s->session->tlsext_tick)
2088 {
2e6ca3d0 2089 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
e6bc27f5
PA
2090 goto err;
2091 }
2092 memcpy(s->session->tlsext_tick, p, ticklen);
2093 s->session->tlsext_ticklen = ticklen;
5f042374
PA
2094 /* There are two ways to detect a resumed ticket sesion.
2095 * One is to set an appropriate session ID and then the server
2096 * must return a match in ServerHello. This allows the normal
2097 * client session ID matching to work and we know much
2098 * earlier that the ticket has been accepted.
2099 *
2100 * The other way is to set zero length session ID when the
2101 * ticket is presented and rely on the handshake to determine
2102 * session resumption.
2103 *
2104 * We choose the former approach because this fits in with
2105 * assumptions elsewhere in OpenSSL. The session ID is set
2106 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2107 * ticket.
2108 */
2109 EVP_Digest(p, ticklen,
2110 s->session->session_id, &s->session->session_id_length,
2111#ifndef OPENSSL_NO_SHA256
2112 EVP_sha256(), NULL);
2113#else
2114 EVP_sha1(), NULL);
2115#endif
e6bc27f5
PA
2116 ret=1;
2117 return(ret);
2118f_err:
2119 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2120err:
2121 return(-1);
2122 }
2e6ca3d0
PA
2123
2124int ssl3_get_cert_status(SSL *s)
2125 {
2126 int ok, al;
919b01cc 2127 unsigned long resplen,n;
2e6ca3d0
PA
2128 const unsigned char *p;
2129
2130 n=s->method->ssl_get_message(s,
2131 SSL3_ST_CR_CERT_STATUS_A,
2132 SSL3_ST_CR_CERT_STATUS_B,
2133 SSL3_MT_CERTIFICATE_STATUS,
2134 16384,
2135 &ok);
2136
2137 if (!ok) return((int)n);
2138 if (n < 4)
2139 {
2140 /* need at least status type + length */
2141 al = SSL_AD_DECODE_ERROR;
2142 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2143 goto f_err;
2144 }
2145 p = (unsigned char *)s->init_msg;
2146 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2147 {
2148 al = SSL_AD_DECODE_ERROR;
2149 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2150 goto f_err;
2151 }
2152 n2l3(p, resplen);
919b01cc 2153 if (resplen + 4 != n)
2e6ca3d0
PA
2154 {
2155 al = SSL_AD_DECODE_ERROR;
2156 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2157 goto f_err;
2158 }
2159 if (s->tlsext_ocsp_resp)
2160 OPENSSL_free(s->tlsext_ocsp_resp);
2161 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2162 if (!s->tlsext_ocsp_resp)
2163 {
2164 al = SSL_AD_INTERNAL_ERROR;
2165 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2166 goto f_err;
2167 }
2168 s->tlsext_ocsp_resplen = resplen;
2169 if (s->ctx->tlsext_status_cb)
2170 {
2171 int ret;
2172 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2173 if (ret == 0)
2174 {
2175 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2176 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2177 goto f_err;
2178 }
2179 if (ret < 0)
2180 {
2181 al = SSL_AD_INTERNAL_ERROR;
2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2183 goto f_err;
2184 }
2185 }
2186 return 1;
2187f_err:
2188 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2189 return(-1);
2190 }
e6bc27f5 2191#endif
56276539
SS
2192
2193int ssl3_get_server_done(SSL *s)
2194 {
2195 int ok,ret=0;
2196 long n;
2197
2198 n=s->method->ssl_get_message(s,
2199 SSL3_ST_CR_SRVR_DONE_A,
2200 SSL3_ST_CR_SRVR_DONE_B,
2201 SSL3_MT_SERVER_DONE,
2202 30, /* should be very small, like 0 :-) */
2203 &ok);
2204
2205 if (!ok) return((int)n);
2206 if (n > 0)
2207 {
2208 /* should contain no data */
2209 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2210 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2211 return -1;
2212 }
2213 ret=1;
2214 return(ret);
2215 }
2216
2217
56276539
SS
2218int ssl3_send_client_key_exchange(SSL *s)
2219 {
2220 unsigned char *p,*d;
2221 int n;
919b01cc 2222 unsigned long alg_k;
56276539
SS
2223#ifndef OPENSSL_NO_RSA
2224 unsigned char *q;
2225 EVP_PKEY *pkey=NULL;
2226#endif
2227#ifndef OPENSSL_NO_KRB5
2228 KSSL_ERR kssl_err;
2229#endif /* OPENSSL_NO_KRB5 */
2230#ifndef OPENSSL_NO_ECDH
2231 EC_KEY *clnt_ecdh = NULL;
2232 const EC_POINT *srvr_ecpoint = NULL;
2233 EVP_PKEY *srvr_pub_pkey = NULL;
2234 unsigned char *encodedPoint = NULL;
2235 int encoded_pt_len = 0;
2236 BN_CTX * bn_ctx = NULL;
2237#endif
2238
2239 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2240 {
2241 d=(unsigned char *)s->init_buf->data;
2242 p= &(d[4]);
2243
919b01cc 2244 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
56276539
SS
2245
2246 /* Fool emacs indentation */
2247 if (0) {}
2248#ifndef OPENSSL_NO_RSA
919b01cc 2249 else if (alg_k & SSL_kRSA)
56276539
SS
2250 {
2251 RSA *rsa;
2252 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2253
2254 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2255 rsa=s->session->sess_cert->peer_rsa_tmp;
2256 else
2257 {
2258 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2259 if ((pkey == NULL) ||
2260 (pkey->type != EVP_PKEY_RSA) ||
2261 (pkey->pkey.rsa == NULL))
2262 {
2263 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2264 goto err;
2265 }
2266 rsa=pkey->pkey.rsa;
2267 EVP_PKEY_free(pkey);
2268 }
2269
2270 tmp_buf[0]=s->client_version>>8;
2271 tmp_buf[1]=s->client_version&0xff;
2272 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2273 goto err;
2274
2275 s->session->master_key_length=sizeof tmp_buf;
2276
2277 q=p;
2278 /* Fix buf for TLS and beyond */
2279 if (s->version > SSL3_VERSION)
2280 p+=2;
2281 n=RSA_public_encrypt(sizeof tmp_buf,
2282 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2283#ifdef PKCS1_CHECK
2284 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2285 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2286#endif
2287 if (n <= 0)
2288 {
2289 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2290 goto err;
2291 }
2292
2293 /* Fix buf for TLS and beyond */
2294 if (s->version > SSL3_VERSION)
2295 {
2296 s2n(n,q);
2297 n+=2;
2298 }
2299
2300 s->session->master_key_length=
2301 s->method->ssl3_enc->generate_master_secret(s,
2302 s->session->master_key,
2303 tmp_buf,sizeof tmp_buf);
2304 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2305 }
2306#endif
2307#ifndef OPENSSL_NO_KRB5
919b01cc 2308 else if (alg_k & SSL_kKRB5)
56276539
SS
2309 {
2310 krb5_error_code krb5rc;
2311 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2312 /* krb5_data krb5_ap_req; */
2313 krb5_data *enc_ticket;
2314 krb5_data authenticator, *authp = NULL;
2315 EVP_CIPHER_CTX ciph_ctx;
919b01cc 2316 const EVP_CIPHER *enc = NULL;
56276539
SS
2317 unsigned char iv[EVP_MAX_IV_LENGTH];
2318 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2319 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2320 + EVP_MAX_IV_LENGTH];
2321 int padl, outl = sizeof(epms);
2322
2323 EVP_CIPHER_CTX_init(&ciph_ctx);
2324
2325#ifdef KSSL_DEBUG
2326 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
919b01cc 2327 alg_k, SSL_kKRB5);
56276539
SS
2328#endif /* KSSL_DEBUG */
2329
2330 authp = NULL;
2331#ifdef KRB5SENDAUTH
2332 if (KRB5SENDAUTH) authp = &authenticator;
2333#endif /* KRB5SENDAUTH */
2334
2335 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2336 &kssl_err);
2337 enc = kssl_map_enc(kssl_ctx->enctype);
2338 if (enc == NULL)
2339 goto err;
2340#ifdef KSSL_DEBUG
2341 {
2342 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2343 if (krb5rc && kssl_err.text)
2344 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2345 }
2346#endif /* KSSL_DEBUG */
2347
2348 if (krb5rc)
2349 {
2350 ssl3_send_alert(s,SSL3_AL_FATAL,
2351 SSL_AD_HANDSHAKE_FAILURE);
2352 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2353 kssl_err.reason);
2354 goto err;
2355 }
2356
2357 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2358 ** in place of RFC 2712 KerberosWrapper, as in:
2359 **
2360 ** Send ticket (copy to *p, set n = length)
2361 ** n = krb5_ap_req.length;
2362 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2363 ** if (krb5_ap_req.data)
2364 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2365 **
2366 ** Now using real RFC 2712 KerberosWrapper
2367 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2368 ** Note: 2712 "opaque" types are here replaced
2369 ** with a 2-byte length followed by the value.
2370 ** Example:
2371 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2372 ** Where "xx xx" = length bytes. Shown here with
2373 ** optional authenticator omitted.
2374 */
2375
2376 /* KerberosWrapper.Ticket */
2377 s2n(enc_ticket->length,p);
2378 memcpy(p, enc_ticket->data, enc_ticket->length);
2379 p+= enc_ticket->length;
2380 n = enc_ticket->length + 2;
2381
2382 /* KerberosWrapper.Authenticator */
2383 if (authp && authp->length)
2384 {
2385 s2n(authp->length,p);
2386 memcpy(p, authp->data, authp->length);
2387 p+= authp->length;
2388 n+= authp->length + 2;
2389
2390 free(authp->data);
2391 authp->data = NULL;
2392 authp->length = 0;
2393 }
2394 else
2395 {
2396 s2n(0,p);/* null authenticator length */
2397 n+=2;
2398 }
2399
e40c9513
PA
2400 tmp_buf[0]=s->client_version>>8;
2401 tmp_buf[1]=s->client_version&0xff;
2402 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2403 goto err;
56276539
SS
2404
2405 /* 20010420 VRS. Tried it this way; failed.
2406 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2407 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2408 ** kssl_ctx->length);
2409 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2410 */
2411
2412 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2413 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2414 kssl_ctx->key,iv);
2415 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2416 sizeof tmp_buf);
2417 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2418 outl += padl;
919b01cc 2419 if (outl > (int)sizeof epms)
56276539
SS
2420 {
2421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2422 goto err;
2423 }
2424 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2425
2426 /* KerberosWrapper.EncryptedPreMasterSecret */
2427 s2n(outl,p);
2428 memcpy(p, epms, outl);
2429 p+=outl;
2430 n+=outl + 2;
2431
2432 s->session->master_key_length=
919b01cc 2433 s->method->ssl3_enc->generate_master_secret(s,
56276539
SS
2434 s->session->master_key,
2435 tmp_buf, sizeof tmp_buf);
2436
2437 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2438 OPENSSL_cleanse(epms, outl);
2439 }
2440#endif
2441#ifndef OPENSSL_NO_DH
919b01cc 2442 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
56276539
SS
2443 {
2444 DH *dh_srvr,*dh_clnt;
2445
683caddb
PA
2446 if (s->session->sess_cert == NULL)
2447 {
2448 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2449 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2450 goto err;
919b01cc 2451 }
2e6ca3d0 2452
56276539
SS
2453 if (s->session->sess_cert->peer_dh_tmp != NULL)
2454 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2455 else
2456 {
2457 /* we get them from the cert */
2458 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2459 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2460 goto err;
2461 }
2462
2463 /* generate a new random key */
2464 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2465 {
2466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2467 goto err;
2468 }
2469 if (!DH_generate_key(dh_clnt))
2470 {
2471 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
22a79287 2472 DH_free(dh_clnt);
56276539
SS
2473 goto err;
2474 }
2475
2476 /* use the 'p' output buffer for the DH key, but
2477 * make sure to clear it out afterwards */
2478
2479 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2480
2481 if (n <= 0)
2482 {
2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
22a79287 2484 DH_free(dh_clnt);
56276539
SS
2485 goto err;
2486 }
2487
2488 /* generate master key from the result */
2489 s->session->master_key_length=
2490 s->method->ssl3_enc->generate_master_secret(s,
2491 s->session->master_key,p,n);
2492 /* clean up */
2493 memset(p,0,n);
2494
2495 /* send off the data */
2496 n=BN_num_bytes(dh_clnt->pub_key);
2497 s2n(n,p);
2498 BN_bn2bin(dh_clnt->pub_key,p);
2499 n+=2;
2500
2501 DH_free(dh_clnt);
2502
2503 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2504 }
2505#endif
2506
2507#ifndef OPENSSL_NO_ECDH
919b01cc 2508 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
56276539
SS
2509 {
2510 const EC_GROUP *srvr_group = NULL;
2511 EC_KEY *tkey;
2512 int ecdh_clnt_cert = 0;
2513 int field_size = 0;
2514
4bb195ec
SW
2515 if (s->session->sess_cert == NULL)
2516 {
2517 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2518 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2519 goto err;
2520 }
2521
56276539
SS
2522 /* Did we send out the client's
2523 * ECDH share for use in premaster
2524 * computation as part of client certificate?
2525 * If so, set ecdh_clnt_cert to 1.
2526 */
919b01cc 2527 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
56276539
SS
2528 {
2529 /* XXX: For now, we do not support client
2530 * authentication using ECDH certificates.
2531 * To add such support, one needs to add
2532 * code that checks for appropriate
2533 * conditions and sets ecdh_clnt_cert to 1.
2534 * For example, the cert have an ECC
2535 * key on the same curve as the server's
2536 * and the key should be authorized for
2537 * key agreement.
2538 *
2539 * One also needs to add code in ssl3_connect
2540 * to skip sending the certificate verify
2541 * message.
2542 *
2543 * if ((s->cert->key->privatekey != NULL) &&
2544 * (s->cert->key->privatekey->type ==
2545 * EVP_PKEY_EC) && ...)
2546 * ecdh_clnt_cert = 1;
2547 */
2548 }
2549
2550 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2551 {
2552 tkey = s->session->sess_cert->peer_ecdh_tmp;
2553 }
2554 else
2555 {
2556 /* Get the Server Public Key from Cert */
2557 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2558 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2559 if ((srvr_pub_pkey == NULL) ||
2560 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2561 (srvr_pub_pkey->pkey.ec == NULL))
2562 {
2563 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2564 ERR_R_INTERNAL_ERROR);
2565 goto err;
2566 }
2567
2568 tkey = srvr_pub_pkey->pkey.ec;
2569 }
2570
2571 srvr_group = EC_KEY_get0_group(tkey);
2572 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2573
2574 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2575 {
2576 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2577 ERR_R_INTERNAL_ERROR);
2578 goto err;
2579 }
2580
2581 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2582 {
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2584 goto err;
2585 }
2586
2587 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2588 {
2589 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2590 goto err;
2591 }
2592 if (ecdh_clnt_cert)
2593 {
2594 /* Reuse key info from our certificate
2595 * We only need our private key to perform
2596 * the ECDH computation.
2597 */
2598 const BIGNUM *priv_key;
2599 tkey = s->cert->key->privatekey->pkey.ec;
2600 priv_key = EC_KEY_get0_private_key(tkey);
2601 if (priv_key == NULL)
2602 {
2603 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2604 goto err;
2605 }
2606 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2607 {
2608 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2609 goto err;
2610 }
2611 }
2612 else
2613 {
2614 /* Generate a new ECDH key pair */
2615 if (!(EC_KEY_generate_key(clnt_ecdh)))
2616 {
2617 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2618 goto err;
2619 }
2620 }
2621
2622 /* use the 'p' output buffer for the ECDH key, but
2623 * make sure to clear it out afterwards
2624 */
2625
2626 field_size = EC_GROUP_get_degree(srvr_group);
2627 if (field_size <= 0)
2628 {
2629 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2630 ERR_R_ECDH_LIB);
2631 goto err;
2632 }
74093195 2633 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
56276539
SS
2634 if (n <= 0)
2635 {
2636 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2637 ERR_R_ECDH_LIB);
2638 goto err;
2639 }
2640
2641 /* generate master key from the result */
2642 s->session->master_key_length = s->method->ssl3_enc \
2643 -> generate_master_secret(s,
2644 s->session->master_key,
2645 p, n);
2646
2647 memset(p, 0, n); /* clean up */
2648
2649 if (ecdh_clnt_cert)
2650 {
2651 /* Send empty client key exch message */
2652 n = 0;
2653 }
2654 else
2655 {
2656 /* First check the size of encoding and
2657 * allocate memory accordingly.
2658 */
2659 encoded_pt_len =
2660 EC_POINT_point2oct(srvr_group,
2661 EC_KEY_get0_public_key(clnt_ecdh),
2662 POINT_CONVERSION_UNCOMPRESSED,
2663 NULL, 0, NULL);
2664
2665 encodedPoint = (unsigned char *)
2666 OPENSSL_malloc(encoded_pt_len *
2667 sizeof(unsigned char));
2668 bn_ctx = BN_CTX_new();
2669 if ((encodedPoint == NULL) ||
2670 (bn_ctx == NULL))
2671 {
2672 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2673 goto err;
2674 }
2675
2676 /* Encode the public key */
2677 n = EC_POINT_point2oct(srvr_group,
2678 EC_KEY_get0_public_key(clnt_ecdh),
2679 POINT_CONVERSION_UNCOMPRESSED,
2680 encodedPoint, encoded_pt_len, bn_ctx);
2681
2682 *p = n; /* length of encoded point */
2683 /* Encoded point will be copied here */
2684 p += 1;
2685 /* copy the point */
2686 memcpy((unsigned char *)p, encodedPoint, n);
2687 /* increment n to account for length field */
2688 n += 1;
2689 }
2690
2691 /* Free allocated memory */
2692 BN_CTX_free(bn_ctx);
2693 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2694 if (clnt_ecdh != NULL)
2695 EC_KEY_free(clnt_ecdh);
2696 EVP_PKEY_free(srvr_pub_pkey);
2697 }
2698#endif /* !OPENSSL_NO_ECDH */
919b01cc
PA
2699 else if (alg_k & SSL_kGOST)
2700 {
2701 /* GOST key exchange message creation */
2702 EVP_PKEY_CTX *pkey_ctx;
2703 X509 *peer_cert;
2704 size_t msglen;
2705 unsigned int md_len;
2706 int keytype;
2707 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2708 EVP_MD_CTX *ukm_hash;
2709 EVP_PKEY *pub_key;
2710
2711 /* Get server sertificate PKEY and create ctx from it */
2712 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2713 if (!peer_cert)
2714 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2715 if (!peer_cert) {
2716 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2717 goto err;
2718 }
2719
2720 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2721 /* If we have send a certificate, and certificate key
2722
2723 * parameters match those of server certificate, use
2724 * certificate key for key exchange
2725 */
2726
2727 /* Otherwise, generate ephemeral key pair */
2728
2729 EVP_PKEY_encrypt_init(pkey_ctx);
2730 /* Generate session key */
2731 RAND_bytes(premaster_secret,32);
2732 /* If we have client certificate, use its secret as peer key */
2733 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2734 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2735 /* If there was an error - just ignore it. Ephemeral key
2736 * would be used
2737 */
2738 ERR_clear_error();
2739 }
2740 }
2741 /* Compute shared IV and store it in algorithm-specific
2742 * context data */
2743 ukm_hash = EVP_MD_CTX_create();
2744 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2745 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2746 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2747 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2748 EVP_MD_CTX_destroy(ukm_hash);
2749 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2750 8,shared_ukm)<0) {
2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2752 SSL_R_LIBRARY_BUG);
2753 goto err;
2754 }
2755 /* Make GOST keytransport blob message */
2756 /*Encapsulate it into sequence */
2757 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2758 msglen=255;
2759 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2760 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2761 SSL_R_LIBRARY_BUG);
2762 goto err;
2763 }
2764 if (msglen >= 0x80)
2765 {
2766 *(p++)=0x81;
2767 *(p++)= msglen & 0xff;
2768 n=msglen+3;
2769 }
2770 else
2771 {
2772 *(p++)= msglen & 0xff;
2773 n=msglen+2;
2774 }
2775 memcpy(p, tmp, msglen);
2776 /* Check if pubkey from client certificate was used */
2777 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2778 {
2779 /* Set flag "skip certificate verify" */
2780 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2781 }
2782 EVP_PKEY_CTX_free(pkey_ctx);
2783 s->session->master_key_length=
2784 s->method->ssl3_enc->generate_master_secret(s,
2785 s->session->master_key,premaster_secret,32);
2786 EVP_PKEY_free(pub_key);
2787
2788 }
672590bc
PA
2789#ifndef OPENSSL_NO_SRP
2790 else if (alg_k & SSL_kSRP)
2791 {
2792 if (s->srp_ctx.A != NULL)
2793 {
2794 /* send off the data */
2795 n=BN_num_bytes(s->srp_ctx.A);
2796 s2n(n,p);
2797 BN_bn2bin(s->srp_ctx.A,p);
2798 n+=2;
2799 }
2800 else
2801 {
2802 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2803 goto err;
2804 }
2805 if (s->session->srp_username != NULL)
2806 OPENSSL_free(s->session->srp_username);
2807 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2808 if (s->session->srp_username == NULL)
2809 {
2810 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2811 ERR_R_MALLOC_FAILURE);
2812 goto err;
2813 }
2814
2815 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2816 {
2817 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2818 goto err;
2819 }
2820 }
2821#endif
919b01cc
PA
2822#ifndef OPENSSL_NO_PSK
2823 else if (alg_k & SSL_kPSK)
2824 {
2825 char identity[PSK_MAX_IDENTITY_LEN];
2826 unsigned char *t = NULL;
2827 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2828 unsigned int pre_ms_len = 0, psk_len = 0;
2829 int psk_err = 1;
2830
2831 n = 0;
2832 if (s->psk_client_callback == NULL)
2833 {
2834 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2835 SSL_R_PSK_NO_CLIENT_CB);
2836 goto err;
2837 }
2838
2839 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2840 identity, PSK_MAX_IDENTITY_LEN,
2841 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2842 if (psk_len > PSK_MAX_PSK_LEN)
2843 {
2844 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2845 ERR_R_INTERNAL_ERROR);
2846 goto psk_err;
2847 }
2848 else if (psk_len == 0)
2849 {
2850 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2851 SSL_R_PSK_IDENTITY_NOT_FOUND);
2852 goto psk_err;
2853 }
2854
2855 /* create PSK pre_master_secret */
2856 pre_ms_len = 2+psk_len+2+psk_len;
2857 t = psk_or_pre_ms;
2858 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2859 s2n(psk_len, t);
2860 memset(t, 0, psk_len);
2861 t+=psk_len;
2862 s2n(psk_len, t);
2863
2864 if (s->session->psk_identity_hint != NULL)
2865 OPENSSL_free(s->session->psk_identity_hint);
2866 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2867 if (s->ctx->psk_identity_hint != NULL &&
2868 s->session->psk_identity_hint == NULL)
2869 {
2870 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2871 ERR_R_MALLOC_FAILURE);
2872 goto psk_err;
2873 }
2874
2875 if (s->session->psk_identity != NULL)
2876 OPENSSL_free(s->session->psk_identity);
2877 s->session->psk_identity = BUF_strdup(identity);
2878 if (s->session->psk_identity == NULL)
2879 {
2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2881 ERR_R_MALLOC_FAILURE);
2882 goto psk_err;
2883 }
2884
2885 s->session->master_key_length =
2886 s->method->ssl3_enc->generate_master_secret(s,
2887 s->session->master_key,
2888 psk_or_pre_ms, pre_ms_len);
2889 n = strlen(identity);
2890 s2n(n, p);
2891 memcpy(p, identity, n);
2892 n+=2;
2893 psk_err = 0;
2894 psk_err:
2895 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2896 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2897 if (psk_err != 0)
2898 {
2899 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2900 goto err;
2901 }
2902 }
2903#endif
56276539
SS
2904 else
2905 {
2906 ssl3_send_alert(s, SSL3_AL_FATAL,
2907 SSL_AD_HANDSHAKE_FAILURE);
2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2909 ERR_R_INTERNAL_ERROR);
2910 goto err;
2911 }
2912
2913 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2914 l2n3(n,d);
2915
2916 s->state=SSL3_ST_CW_KEY_EXCH_B;
2917 /* number of bytes to write */
2918 s->init_num=n+4;
2919 s->init_off=0;
2920 }
2921
2922 /* SSL3_ST_CW_KEY_EXCH_B */
2923 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2924err:
2925#ifndef OPENSSL_NO_ECDH
2926 BN_CTX_free(bn_ctx);
2927 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2928 if (clnt_ecdh != NULL)
2929 EC_KEY_free(clnt_ecdh);
2930 EVP_PKEY_free(srvr_pub_pkey);
2931#endif
2932 return(-1);
2933 }
2934
2935int ssl3_send_client_verify(SSL *s)
2936 {
2937 unsigned char *p,*d;
2938 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2939 EVP_PKEY *pkey;
919b01cc 2940 EVP_PKEY_CTX *pctx=NULL;
672590bc 2941 EVP_MD_CTX mctx;
56276539 2942 unsigned u=0;
56276539 2943 unsigned long n;
56276539 2944 int j;
56276539 2945
672590bc
PA
2946 EVP_MD_CTX_init(&mctx);
2947
56276539
SS
2948 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2949 {
2950 d=(unsigned char *)s->init_buf->data;
2951 p= &(d[4]);
2952 pkey=s->cert->key->privatekey;
919b01cc
PA
2953/* Create context from key and test if sha1 is allowed as digest */
2954 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2955 EVP_PKEY_sign_init(pctx);
2956 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2957 {
672590bc
PA
2958 if (TLS1_get_version(s) < TLS1_2_VERSION)
2959 s->method->ssl3_enc->cert_verify_mac(s,
919b01cc
PA
2960 NID_sha1,
2961 &(data[MD5_DIGEST_LENGTH]));
2962 }
2963 else
2964 {
2965 ERR_clear_error();
2966 }
672590bc
PA
2967 /* For TLS v1.2 send signature algorithm and signature
2968 * using agreed digest and cached handshake records.
2969 */
2970 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2971 {
2972 long hdatalen = 0;
2973 void *hdata;
2974 const EVP_MD *md = s->cert->key->digest;
2975 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2976 &hdata);
2977 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2978 {
2979 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2980 ERR_R_INTERNAL_ERROR);
2981 goto err;
2982 }
2983 p += 2;
2984#ifdef SSL_DEBUG
2985 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2986 EVP_MD_name(md));
2987#endif
2988 if (!EVP_SignInit_ex(&mctx, md, NULL)
2989 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2990 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2991 {
2992 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2993 ERR_R_EVP_LIB);
2994 goto err;
2995 }
2996 s2n(u,p);
2997 n = u + 4;
2998 if (!ssl3_digest_cached_records(s))
2999 goto err;
3000 }
3001 else
56276539
SS
3002#ifndef OPENSSL_NO_RSA
3003 if (pkey->type == EVP_PKEY_RSA)
3004 {
3005 s->method->ssl3_enc->cert_verify_mac(s,
919b01cc
PA
3006 NID_md5,
3007 &(data[0]));
56276539
SS
3008 if (RSA_sign(NID_md5_sha1, data,
3009 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3010 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3011 {
3012 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3013 goto err;
3014 }
3015 s2n(u,p);
3016 n=u+2;
3017 }
3018 else
3019#endif
3020#ifndef OPENSSL_NO_DSA
3021 if (pkey->type == EVP_PKEY_DSA)
3022 {
3023 if (!DSA_sign(pkey->save_type,
3024 &(data[MD5_DIGEST_LENGTH]),
3025 SHA_DIGEST_LENGTH,&(p[2]),
3026 (unsigned int *)&j,pkey->pkey.dsa))
3027 {
3028 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3029 goto err;
3030 }
3031 s2n(j,p);
3032 n=j+2;
3033 }
3034 else
3035#endif
3036#ifndef OPENSSL_NO_ECDSA
3037 if (pkey->type == EVP_PKEY_EC)
3038 {
3039 if (!ECDSA_sign(pkey->save_type,
3040 &(data[MD5_DIGEST_LENGTH]),
3041 SHA_DIGEST_LENGTH,&(p[2]),
3042 (unsigned int *)&j,pkey->pkey.ec))
3043 {
3044 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3045 ERR_R_ECDSA_LIB);
3046 goto err;
3047 }
3048 s2n(j,p);
3049 n=j+2;
3050 }
3051 else
3052#endif
919b01cc
PA
3053 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3054 {
3055 unsigned char signbuf[64];
3056 int i;
3057 size_t sigsize=64;
3058 s->method->ssl3_enc->cert_verify_mac(s,
3059 NID_id_GostR3411_94,
3060 data);
3061 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3062 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3063 ERR_R_INTERNAL_ERROR);
3064 goto err;
3065 }
3066 for (i=63,j=0; i>=0; j++, i--) {
3067 p[2+j]=signbuf[i];
3068 }
3069 s2n(j,p);
3070 n=j+2;
3071 }
3072 else
3073 {
56276539
SS
3074 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3075 goto err;
919b01cc 3076 }
56276539
SS
3077 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3078 l2n3(n,d);
3079
3080 s->state=SSL3_ST_CW_CERT_VRFY_B;
3081 s->init_num=(int)n+4;
3082 s->init_off=0;
3083 }
672590bc 3084 EVP_MD_CTX_cleanup(&mctx);
919b01cc 3085 EVP_PKEY_CTX_free(pctx);
56276539
SS
3086 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3087err:
672590bc 3088 EVP_MD_CTX_cleanup(&mctx);
919b01cc 3089 EVP_PKEY_CTX_free(pctx);
56276539
SS
3090 return(-1);
3091 }
3092
3093int ssl3_send_client_certificate(SSL *s)
3094 {
3095 X509 *x509=NULL;
3096 EVP_PKEY *pkey=NULL;
3097 int i;
3098 unsigned long l;
3099
3100 if (s->state == SSL3_ST_CW_CERT_A)
3101 {
3102 if ((s->cert == NULL) ||
3103 (s->cert->key->x509 == NULL) ||
3104 (s->cert->key->privatekey == NULL))
3105 s->state=SSL3_ST_CW_CERT_B;
3106 else
3107 s->state=SSL3_ST_CW_CERT_C;
3108 }
3109
3110 /* We need to get a client cert */
3111 if (s->state == SSL3_ST_CW_CERT_B)
3112 {
3113 /* If we get an error, we need to
3114 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3115 * We then get retied later */
3116 i=0;
683caddb 3117 i = ssl_do_client_cert_cb(s, &x509, &pkey);
56276539
SS
3118 if (i < 0)
3119 {
3120 s->rwstate=SSL_X509_LOOKUP;
3121 return(-1);
3122 }
3123 s->rwstate=SSL_NOTHING;
3124 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3125 {
3126 s->state=SSL3_ST_CW_CERT_B;
3127 if ( !SSL_use_certificate(s,x509) ||
3128 !SSL_use_PrivateKey(s,pkey))
3129 i=0;
3130 }
3131 else if (i == 1)
3132 {
3133 i=0;
3134 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3135 }
3136
3137 if (x509 != NULL) X509_free(x509);
3138 if (pkey != NULL) EVP_PKEY_free(pkey);
3139 if (i == 0)
3140 {
3141 if (s->version == SSL3_VERSION)
3142 {
3143 s->s3->tmp.cert_req=0;
3144 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3145 return(1);
3146 }
3147 else
3148 {
3149 s->s3->tmp.cert_req=2;
3150 }
3151 }
3152
3153 /* Ok, we have a cert */
3154 s->state=SSL3_ST_CW_CERT_C;
3155 }
3156
3157 if (s->state == SSL3_ST_CW_CERT_C)
3158 {
3159 s->state=SSL3_ST_CW_CERT_D;
3160 l=ssl3_output_cert_chain(s,
3161 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3162 s->init_num=(int)l;
3163 s->init_off=0;
3164 }
3165 /* SSL3_ST_CW_CERT_D */
3166 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3167 }
3168
3169#define has_bits(i,m) (((i)&(m)) == (m))
3170
3171int ssl3_check_cert_and_algorithm(SSL *s)
3172 {
3173 int i,idx;
919b01cc 3174 long alg_k,alg_a;
56276539
SS
3175 EVP_PKEY *pkey=NULL;
3176 SESS_CERT *sc;
3177#ifndef OPENSSL_NO_RSA
3178 RSA *rsa;
3179#endif
3180#ifndef OPENSSL_NO_DH
3181 DH *dh;
3182#endif
3183
919b01cc
PA
3184 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3185 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
56276539
SS
3186
3187 /* we don't have a certificate */
919b01cc 3188 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
56276539
SS
3189 return(1);
3190
919b01cc 3191 sc=s->session->sess_cert;
e6bc27f5
PA
3192 if (sc == NULL)
3193 {
3194 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3195 goto err;
3196 }
3197
56276539
SS
3198#ifndef OPENSSL_NO_RSA
3199 rsa=s->session->sess_cert->peer_rsa_tmp;
3200#endif
3201#ifndef OPENSSL_NO_DH
3202 dh=s->session->sess_cert->peer_dh_tmp;
3203#endif
3204
3205 /* This is the passed certificate */
3206
3207 idx=sc->peer_cert_type;
3208#ifndef OPENSSL_NO_ECDH
3209 if (idx == SSL_PKEY_ECC)
3210 {
919b01cc 3211 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
672590bc 3212 s) == 0)
56276539
SS
3213 { /* check failed */
3214 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
919b01cc 3215 goto f_err;
56276539
SS
3216 }
3217 else
3218 {
3219 return 1;
3220 }
3221 }
3222#endif
3223 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3224 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3225 EVP_PKEY_free(pkey);
3226
3227
3228 /* Check that we have a certificate if we require one */
919b01cc 3229 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
56276539
SS
3230 {
3231 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3232 goto f_err;
3233 }
3234#ifndef OPENSSL_NO_DSA
919b01cc 3235 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
56276539
SS
3236 {
3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3238 goto f_err;
3239 }
3240#endif
3241#ifndef OPENSSL_NO_RSA
919b01cc 3242 if ((alg_k & SSL_kRSA) &&
56276539
SS
3243 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3244 {
3245 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3246 goto f_err;
3247 }
3248#endif
3249#ifndef OPENSSL_NO_DH
919b01cc 3250 if ((alg_k & SSL_kEDH) &&
56276539
SS
3251 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3252 {
3253 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3254 goto f_err;
3255 }
919b01cc 3256 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
56276539
SS
3257 {
3258 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3259 goto f_err;
3260 }
3261#ifndef OPENSSL_NO_DSA
919b01cc 3262 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
56276539
SS
3263 {
3264 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3265 goto f_err;
3266 }
3267#endif
3268#endif
3269
3270 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3271 {
3272#ifndef OPENSSL_NO_RSA
919b01cc 3273 if (alg_k & SSL_kRSA)
56276539
SS
3274 {
3275 if (rsa == NULL
3276 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3277 {
3278 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3279 goto f_err;
3280 }
3281 }
3282 else
3283#endif
3284#ifndef OPENSSL_NO_DH
919b01cc 3285 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
56276539
SS
3286 {
3287 if (dh == NULL
3288 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3289 {
3290 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3291 goto f_err;
3292 }
3293 }
3294 else
3295#endif
3296 {
3297 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3298 goto f_err;
3299 }
3300 }
3301 return(1);
3302f_err:
3303 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3304err:
3305 return(0);
3306 }
3307
672590bc
PA
3308#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3309int ssl3_send_next_proto(SSL *s)
3310 {
3311 unsigned int len, padding_len;
3312 unsigned char *d;
3313
3314 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3315 {
3316 len = s->next_proto_negotiated_len;
3317 padding_len = 32 - ((len + 2) % 32);
3318 d = (unsigned char *)s->init_buf->data;
3319 d[4] = len;
3320 memcpy(d + 5, s->next_proto_negotiated, len);
3321 d[5 + len] = padding_len;
3322 memset(d + 6 + len, 0, padding_len);
3323 *(d++)=SSL3_MT_NEXT_PROTO;
3324 l2n3(2 + len + padding_len, d);
3325 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3326 s->init_num = 4 + 2 + len + padding_len;
3327 s->init_off = 0;
3328 }
3329
3330 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3331}
3332#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3333
e6bc27f5
PA
3334/* Check to see if handshake is full or resumed. Usually this is just a
3335 * case of checking to see if a cache hit has occurred. In the case of
3336 * session tickets we have to check the next message to be sure.
3337 */
3338
3339#ifndef OPENSSL_NO_TLSEXT
5f042374 3340int ssl3_check_finished(SSL *s)
e6bc27f5
PA
3341 {
3342 int ok;
3343 long n;
919b01cc
PA
3344 /* If we have no ticket it cannot be a resumed session. */
3345 if (!s->session->tlsext_tick)
e6bc27f5
PA
3346 return 1;
3347 /* this function is called when we really expect a Certificate
3348 * message, so permit appropriate message length */
3349 n=s->method->ssl_get_message(s,
3350 SSL3_ST_CR_CERT_A,
3351 SSL3_ST_CR_CERT_B,
3352 -1,
3353 s->max_cert_list,
3354 &ok);
3355 if (!ok) return((int)n);
3356 s->s3->tmp.reuse_message = 1;
3357 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3358 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3359 return 2;
3360
3361 return 1;
3362 }
3363#endif
683caddb
PA
3364
3365int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3366 {
3367 int i = 0;
3368#ifndef OPENSSL_NO_ENGINE
3369 if (s->ctx->client_cert_engine)
3370 {
3371 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3372 SSL_get_client_CA_list(s),
3373 px509, ppkey, NULL, NULL, NULL);
3374 if (i != 0)
3375 return i;
3376 }
3377#endif
3378 if (s->ctx->client_cert_cb)
3379 i = s->ctx->client_cert_cb(s,px509,ppkey);
3380 return i;
3381 }