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fix WIN32 warnings
[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306 #endif
307 }
308 else
309 {
310 s->state=SSL3_ST_CR_CERT_A;
311 }
312 s->init_num=0;
313 break;
314 #ifndef OPENSSL_NO_TLSEXT
315 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
316 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
317 ret = tls1_get_server_supplemental_data(s);
318 if (ret <= 0) goto end;
319 s->state=SSL3_ST_CR_CERT_A;
320 s->init_num = 0;
321 break;
322 #endif
323 case SSL3_ST_CR_CERT_A:
324 case SSL3_ST_CR_CERT_B:
325 #ifndef OPENSSL_NO_TLSEXT
326 ret=ssl3_check_finished(s);
327 if (ret <= 0) goto end;
328 if (ret == 3)
329 {
330 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
331 s->init_num=0;
332 break;
333 }
334 if (ret == 2)
335 {
336 s->hit = 1;
337 if (s->tlsext_ticket_expected)
338 s->state=SSL3_ST_CR_SESSION_TICKET_A;
339 else
340 s->state=SSL3_ST_CR_FINISHED_A;
341 s->init_num=0;
342 break;
343 }
344 #endif
345 /* Check if it is anon DH/ECDH */
346 /* or PSK */
347 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
348 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
349 {
350 ret=ssl3_get_server_certificate(s);
351 if (ret <= 0) goto end;
352 #ifndef OPENSSL_NO_TLSEXT
353 if (s->tlsext_status_expected)
354 s->state=SSL3_ST_CR_CERT_STATUS_A;
355 else
356 s->state=SSL3_ST_CR_KEY_EXCH_A;
357 }
358 else
359 {
360 skip = 1;
361 s->state=SSL3_ST_CR_KEY_EXCH_A;
362 }
363 #else
364 }
365 else
366 skip=1;
367
368 s->state=SSL3_ST_CR_KEY_EXCH_A;
369 #endif
370 s->init_num=0;
371 break;
372
373 case SSL3_ST_CR_KEY_EXCH_A:
374 case SSL3_ST_CR_KEY_EXCH_B:
375 ret=ssl3_get_key_exchange(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_CERT_REQ_A;
378 s->init_num=0;
379
380 /* at this point we check that we have the
381 * required stuff from the server */
382 if (!ssl3_check_cert_and_algorithm(s))
383 {
384 ret= -1;
385 goto end;
386 }
387 break;
388
389 case SSL3_ST_CR_CERT_REQ_A:
390 case SSL3_ST_CR_CERT_REQ_B:
391 ret=ssl3_get_certificate_request(s);
392 if (ret <= 0) goto end;
393 s->state=SSL3_ST_CR_SRVR_DONE_A;
394 s->init_num=0;
395 break;
396
397 case SSL3_ST_CR_SRVR_DONE_A:
398 case SSL3_ST_CR_SRVR_DONE_B:
399 ret=ssl3_get_server_done(s);
400 if (ret <= 0) goto end;
401 #ifndef OPENSSL_NO_SRP
402 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
403 {
404 if ((ret = SRP_Calc_A_param(s))<=0)
405 {
406 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
407 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
408 goto end;
409 }
410 }
411 #endif
412 #ifndef OPENSSL_NO_TLSEXT
413 s->state=SSL3_ST_CW_SUPPLEMENTAL_DATA_A;
414 #else
415 if (s->s3->tmp.cert_req)
416 s->state=SSL3_ST_CW_CERT_A;
417 else
418 s->state=SSL3_ST_CW_KEY_EXCH_A;
419 #endif
420 s->init_num=0;
421
422 break;
423
424 case SSL3_ST_CW_CERT_A:
425 case SSL3_ST_CW_CERT_B:
426 case SSL3_ST_CW_CERT_C:
427 case SSL3_ST_CW_CERT_D:
428 ret=ssl3_send_client_certificate(s);
429 if (ret <= 0) goto end;
430 s->state=SSL3_ST_CW_KEY_EXCH_A;
431 s->init_num=0;
432 break;
433
434 case SSL3_ST_CW_KEY_EXCH_A:
435 case SSL3_ST_CW_KEY_EXCH_B:
436 ret=ssl3_send_client_key_exchange(s);
437 if (ret <= 0) goto end;
438 /* EAY EAY EAY need to check for DH fix cert
439 * sent back */
440 /* For TLS, cert_req is set to 2, so a cert chain
441 * of nothing is sent, but no verify packet is sent */
442 /* XXX: For now, we do not support client
443 * authentication in ECDH cipher suites with
444 * ECDH (rather than ECDSA) certificates.
445 * We need to skip the certificate verify
446 * message when client's ECDH public key is sent
447 * inside the client certificate.
448 */
449 if (s->s3->tmp.cert_req == 1)
450 {
451 s->state=SSL3_ST_CW_CERT_VRFY_A;
452 }
453 else
454 {
455 s->state=SSL3_ST_CW_CHANGE_A;
456 s->s3->change_cipher_spec=0;
457 }
458 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
459 {
460 s->state=SSL3_ST_CW_CHANGE_A;
461 s->s3->change_cipher_spec=0;
462 }
463
464 s->init_num=0;
465 break;
466
467 case SSL3_ST_CW_CERT_VRFY_A:
468 case SSL3_ST_CW_CERT_VRFY_B:
469 ret=ssl3_send_client_verify(s);
470 if (ret <= 0) goto end;
471 s->state=SSL3_ST_CW_CHANGE_A;
472 s->init_num=0;
473 s->s3->change_cipher_spec=0;
474 break;
475
476 case SSL3_ST_CW_CHANGE_A:
477 case SSL3_ST_CW_CHANGE_B:
478 ret=ssl3_send_change_cipher_spec(s,
479 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
480 if (ret <= 0) goto end;
481
482 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
483 s->state=SSL3_ST_CW_FINISHED_A;
484 #else
485 if (s->s3->next_proto_neg_seen)
486 s->state=SSL3_ST_CW_NEXT_PROTO_A;
487 else
488 s->state=SSL3_ST_CW_FINISHED_A;
489 #endif
490 s->init_num=0;
491
492 s->session->cipher=s->s3->tmp.new_cipher;
493 #ifdef OPENSSL_NO_COMP
494 s->session->compress_meth=0;
495 #else
496 if (s->s3->tmp.new_compression == NULL)
497 s->session->compress_meth=0;
498 else
499 s->session->compress_meth=
500 s->s3->tmp.new_compression->id;
501 #endif
502 if (!s->method->ssl3_enc->setup_key_block(s))
503 {
504 ret= -1;
505 goto end;
506 }
507
508 if (!s->method->ssl3_enc->change_cipher_state(s,
509 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
510 {
511 ret= -1;
512 goto end;
513 }
514
515 break;
516
517 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
518 case SSL3_ST_CW_NEXT_PROTO_A:
519 case SSL3_ST_CW_NEXT_PROTO_B:
520 ret=ssl3_send_next_proto(s);
521 if (ret <= 0) goto end;
522 s->state=SSL3_ST_CW_FINISHED_A;
523 break;
524 #endif
525
526 #ifndef OPENSSL_NO_TLSEXT
527 case SSL3_ST_CW_SUPPLEMENTAL_DATA_A:
528 case SSL3_ST_CW_SUPPLEMENTAL_DATA_B:
529 ret = tls1_send_client_supplemental_data(s, &skip);
530 if (ret <= 0) goto end;
531 if (s->s3->tmp.cert_req)
532 s->state=SSL3_ST_CW_CERT_A;
533 else
534 s->state=SSL3_ST_CW_KEY_EXCH_A;
535 s->init_num=0;
536 break;
537 #endif
538
539 case SSL3_ST_CW_FINISHED_A:
540 case SSL3_ST_CW_FINISHED_B:
541 ret=ssl3_send_finished(s,
542 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
543 s->method->ssl3_enc->client_finished_label,
544 s->method->ssl3_enc->client_finished_label_len);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CW_FLUSH;
547
548 /* clear flags */
549 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
550 if (s->hit)
551 {
552 s->s3->tmp.next_state=SSL_ST_OK;
553 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
554 {
555 s->state=SSL_ST_OK;
556 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
557 s->s3->delay_buf_pop_ret=0;
558 }
559 }
560 else
561 {
562 #ifndef OPENSSL_NO_TLSEXT
563 /* Allow NewSessionTicket if ticket expected */
564 if (s->tlsext_ticket_expected)
565 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
566 else
567 #endif
568
569 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
570 }
571 s->init_num=0;
572 break;
573
574 #ifndef OPENSSL_NO_TLSEXT
575 case SSL3_ST_CR_SESSION_TICKET_A:
576 case SSL3_ST_CR_SESSION_TICKET_B:
577 ret=ssl3_get_new_session_ticket(s);
578 if (ret <= 0) goto end;
579 s->state=SSL3_ST_CR_FINISHED_A;
580 s->init_num=0;
581 break;
582
583 case SSL3_ST_CR_CERT_STATUS_A:
584 case SSL3_ST_CR_CERT_STATUS_B:
585 ret=ssl3_get_cert_status(s);
586 if (ret <= 0) goto end;
587 s->state=SSL3_ST_CR_KEY_EXCH_A;
588 s->init_num=0;
589 break;
590 #endif
591
592 case SSL3_ST_CR_FINISHED_A:
593 case SSL3_ST_CR_FINISHED_B:
594
595 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
596 SSL3_ST_CR_FINISHED_B);
597 if (ret <= 0) goto end;
598
599 if (s->hit)
600 s->state=SSL3_ST_CW_CHANGE_A;
601 else
602 s->state=SSL_ST_OK;
603 s->init_num=0;
604 break;
605
606 case SSL3_ST_CW_FLUSH:
607 s->rwstate=SSL_WRITING;
608 if (BIO_flush(s->wbio) <= 0)
609 {
610 ret= -1;
611 goto end;
612 }
613 s->rwstate=SSL_NOTHING;
614 s->state=s->s3->tmp.next_state;
615 break;
616
617 case SSL_ST_OK:
618 /* clean a few things up */
619 ssl3_cleanup_key_block(s);
620
621 if (s->init_buf != NULL)
622 {
623 BUF_MEM_free(s->init_buf);
624 s->init_buf=NULL;
625 }
626
627 /* If we are not 'joining' the last two packets,
628 * remove the buffering now */
629 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
630 ssl_free_wbio_buffer(s);
631 /* else do it later in ssl3_write */
632
633 s->init_num=0;
634 s->renegotiate=0;
635 s->new_session=0;
636
637 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
638 if (s->hit) s->ctx->stats.sess_hit++;
639
640 ret=1;
641 /* s->server=0; */
642 s->handshake_func=ssl3_connect;
643 s->ctx->stats.sess_connect_good++;
644
645 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
646
647 goto end;
648 /* break; */
649
650 default:
651 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
652 ret= -1;
653 goto end;
654 /* break; */
655 }
656
657 /* did we do anything */
658 if (!s->s3->tmp.reuse_message && !skip)
659 {
660 if (s->debug)
661 {
662 if ((ret=BIO_flush(s->wbio)) <= 0)
663 goto end;
664 }
665
666 if ((cb != NULL) && (s->state != state))
667 {
668 new_state=s->state;
669 s->state=state;
670 cb(s,SSL_CB_CONNECT_LOOP,1);
671 s->state=new_state;
672 }
673 }
674 skip=0;
675 }
676 end:
677 s->in_handshake--;
678 if (buf != NULL)
679 BUF_MEM_free(buf);
680 if (cb != NULL)
681 cb(s,SSL_CB_CONNECT_EXIT,ret);
682 return(ret);
683 }
684
685
686 int ssl3_client_hello(SSL *s)
687 {
688 unsigned char *buf;
689 unsigned char *p,*d;
690 int i;
691 unsigned long l;
692 int al = 0;
693 #ifndef OPENSSL_NO_COMP
694 int j;
695 SSL_COMP *comp;
696 #endif
697
698 buf=(unsigned char *)s->init_buf->data;
699 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
700 {
701 SSL_SESSION *sess = s->session;
702 if ((sess == NULL) ||
703 (sess->ssl_version != s->version) ||
704 #ifdef OPENSSL_NO_TLSEXT
705 !sess->session_id_length ||
706 #else
707 (!sess->session_id_length && !sess->tlsext_tick) ||
708 #endif
709 (sess->not_resumable))
710 {
711 if (!ssl_get_new_session(s,0))
712 goto err;
713 }
714 if (s->method->version == DTLS_ANY_VERSION)
715 {
716 /* Determine which DTLS version to use */
717 int options = s->options;
718 /* If DTLS 1.2 disabled correct the version number */
719 if (options & SSL_OP_NO_DTLSv1_2)
720 {
721 if (tls1_suiteb(s))
722 {
723 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
724 goto err;
725 }
726 /* Disabling all versions is silly: return an
727 * error.
728 */
729 if (options & SSL_OP_NO_DTLSv1)
730 {
731 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
732 goto err;
733 }
734 /* Update method so we don't use any DTLS 1.2
735 * features.
736 */
737 s->method = DTLSv1_client_method();
738 s->version = DTLS1_VERSION;
739 }
740 else
741 {
742 /* We only support one version: update method */
743 if (options & SSL_OP_NO_DTLSv1)
744 s->method = DTLSv1_2_client_method();
745 s->version = DTLS1_2_VERSION;
746 }
747 s->client_version = s->version;
748 }
749 /* else use the pre-loaded session */
750
751 p=s->s3->client_random;
752
753 /* for DTLS if client_random is initialized, reuse it, we are
754 * required to use same upon reply to HelloVerify */
755 if (SSL_IS_DTLS(s))
756 {
757 size_t idx;
758 i = 1;
759 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
760 {
761 if (p[idx])
762 {
763 i = 0;
764 break;
765 }
766 }
767 }
768 else
769 i = 1;
770
771 if (i)
772 ssl_fill_hello_random(s, 0, p,
773 sizeof(s->s3->client_random));
774
775 /* Do the message type and length last */
776 d=p= ssl_handshake_start(s);
777
778 /* version indicates the negotiated version: for example from
779 * an SSLv2/v3 compatible client hello). The client_version
780 * field is the maximum version we permit and it is also
781 * used in RSA encrypted premaster secrets. Some servers can
782 * choke if we initially report a higher version then
783 * renegotiate to a lower one in the premaster secret. This
784 * didn't happen with TLS 1.0 as most servers supported it
785 * but it can with TLS 1.1 or later if the server only supports
786 * 1.0.
787 *
788 * Possible scenario with previous logic:
789 * 1. Client hello indicates TLS 1.2
790 * 2. Server hello says TLS 1.0
791 * 3. RSA encrypted premaster secret uses 1.2.
792 * 4. Handhaked proceeds using TLS 1.0.
793 * 5. Server sends hello request to renegotiate.
794 * 6. Client hello indicates TLS v1.0 as we now
795 * know that is maximum server supports.
796 * 7. Server chokes on RSA encrypted premaster secret
797 * containing version 1.0.
798 *
799 * For interoperability it should be OK to always use the
800 * maximum version we support in client hello and then rely
801 * on the checking of version to ensure the servers isn't
802 * being inconsistent: for example initially negotiating with
803 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
804 * client_version in client hello and not resetting it to
805 * the negotiated version.
806 */
807 #if 0
808 *(p++)=s->version>>8;
809 *(p++)=s->version&0xff;
810 s->client_version=s->version;
811 #else
812 *(p++)=s->client_version>>8;
813 *(p++)=s->client_version&0xff;
814 #endif
815
816 /* Random stuff */
817 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
818 p+=SSL3_RANDOM_SIZE;
819
820 /* Session ID */
821 if (s->new_session)
822 i=0;
823 else
824 i=s->session->session_id_length;
825 *(p++)=i;
826 if (i != 0)
827 {
828 if (i > (int)sizeof(s->session->session_id))
829 {
830 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
831 goto err;
832 }
833 memcpy(p,s->session->session_id,i);
834 p+=i;
835 }
836
837 /* cookie stuff for DTLS */
838 if (SSL_IS_DTLS(s))
839 {
840 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
841 {
842 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
843 goto err;
844 }
845 *(p++) = s->d1->cookie_len;
846 memcpy(p, s->d1->cookie, s->d1->cookie_len);
847 p += s->d1->cookie_len;
848 }
849
850 /* Ciphers supported */
851 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
852 if (i == 0)
853 {
854 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
855 goto err;
856 }
857 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
858 /* Some servers hang if client hello > 256 bytes
859 * as hack workaround chop number of supported ciphers
860 * to keep it well below this if we use TLS v1.2
861 */
862 if (TLS1_get_version(s) >= TLS1_2_VERSION
863 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
864 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
865 #endif
866 s2n(i,p);
867 p+=i;
868
869 /* COMPRESSION */
870 #ifdef OPENSSL_NO_COMP
871 *(p++)=1;
872 #else
873
874 if ((s->options & SSL_OP_NO_COMPRESSION)
875 || !s->ctx->comp_methods)
876 j=0;
877 else
878 j=sk_SSL_COMP_num(s->ctx->comp_methods);
879 *(p++)=1+j;
880 for (i=0; i<j; i++)
881 {
882 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
883 *(p++)=comp->id;
884 }
885 #endif
886 *(p++)=0; /* Add the NULL method */
887
888 #ifndef OPENSSL_NO_TLSEXT
889 /* TLS extensions*/
890 if (ssl_prepare_clienthello_tlsext(s) <= 0)
891 {
892 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
893 goto err;
894 }
895 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
896 {
897 ssl3_send_alert(s,SSL3_AL_FATAL,al);
898 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
899 goto err;
900 }
901 #endif
902
903 l= p-d;
904 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
905 s->state=SSL3_ST_CW_CLNT_HELLO_B;
906 }
907
908 /* SSL3_ST_CW_CLNT_HELLO_B */
909 return ssl_do_write(s);
910 err:
911 return(-1);
912 }
913
914 int ssl3_get_server_hello(SSL *s)
915 {
916 STACK_OF(SSL_CIPHER) *sk;
917 const SSL_CIPHER *c;
918 CERT *ct = s->cert;
919 unsigned char *p,*d;
920 int i,al=SSL_AD_INTERNAL_ERROR,ok;
921 unsigned int j;
922 long n;
923 #ifndef OPENSSL_NO_COMP
924 SSL_COMP *comp;
925 #endif
926 /* Hello verify request and/or server hello version may not
927 * match so set first packet if we're negotiating version.
928 */
929 if (SSL_IS_DTLS(s))
930 s->first_packet = 1;
931
932 n=s->method->ssl_get_message(s,
933 SSL3_ST_CR_SRVR_HELLO_A,
934 SSL3_ST_CR_SRVR_HELLO_B,
935 -1,
936 20000, /* ?? */
937 &ok);
938
939 if (!ok) return((int)n);
940
941 if (SSL_IS_DTLS(s))
942 {
943 s->first_packet = 0;
944 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
945 {
946 if ( s->d1->send_cookie == 0)
947 {
948 s->s3->tmp.reuse_message = 1;
949 return 1;
950 }
951 else /* already sent a cookie */
952 {
953 al=SSL_AD_UNEXPECTED_MESSAGE;
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
955 goto f_err;
956 }
957 }
958 }
959
960 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
961 {
962 al=SSL_AD_UNEXPECTED_MESSAGE;
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
964 goto f_err;
965 }
966
967 d=p=(unsigned char *)s->init_msg;
968 if (s->method->version == DTLS_ANY_VERSION)
969 {
970 /* Work out correct protocol version to use */
971 int hversion = (p[0] << 8)|p[1];
972 int options = s->options;
973 if (hversion == DTLS1_2_VERSION
974 && !(options & SSL_OP_NO_DTLSv1_2))
975 s->method = DTLSv1_2_client_method();
976 else if (tls1_suiteb(s))
977 {
978 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
979 s->version = hversion;
980 al = SSL_AD_PROTOCOL_VERSION;
981 goto f_err;
982 }
983 else if (hversion == DTLS1_VERSION
984 && !(options & SSL_OP_NO_DTLSv1))
985 s->method = DTLSv1_client_method();
986 else
987 {
988 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
989 s->version = hversion;
990 al = SSL_AD_PROTOCOL_VERSION;
991 goto f_err;
992 }
993 s->version = s->client_version = s->method->version;
994 }
995
996 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
997 {
998 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
999 s->version=(s->version&0xff00)|p[1];
1000 al=SSL_AD_PROTOCOL_VERSION;
1001 goto f_err;
1002 }
1003 p+=2;
1004
1005 /* load the server hello data */
1006 /* load the server random */
1007 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
1008 p+=SSL3_RANDOM_SIZE;
1009
1010 /* get the session-id */
1011 j= *(p++);
1012
1013 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1014 {
1015 al=SSL_AD_ILLEGAL_PARAMETER;
1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1017 goto f_err;
1018 }
1019
1020 #ifndef OPENSSL_NO_TLSEXT
1021 /* check if we want to resume the session based on external pre-shared secret */
1022 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1023 {
1024 SSL_CIPHER *pref_cipher=NULL;
1025 s->session->master_key_length=sizeof(s->session->master_key);
1026 if (s->tls_session_secret_cb(s, s->session->master_key,
1027 &s->session->master_key_length,
1028 NULL, &pref_cipher,
1029 s->tls_session_secret_cb_arg))
1030 {
1031 s->session->cipher = pref_cipher ?
1032 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1033 }
1034 }
1035 #endif /* OPENSSL_NO_TLSEXT */
1036
1037 if (j != 0 && j == s->session->session_id_length
1038 && memcmp(p,s->session->session_id,j) == 0)
1039 {
1040 if(s->sid_ctx_length != s->session->sid_ctx_length
1041 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1042 {
1043 /* actually a client application bug */
1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1046 goto f_err;
1047 }
1048 s->hit=1;
1049 }
1050 else /* a miss or crap from the other end */
1051 {
1052 /* If we were trying for session-id reuse, make a new
1053 * SSL_SESSION so we don't stuff up other people */
1054 s->hit=0;
1055 if (s->session->session_id_length > 0)
1056 {
1057 if (!ssl_get_new_session(s,0))
1058 {
1059 goto f_err;
1060 }
1061 }
1062 s->session->session_id_length=j;
1063 memcpy(s->session->session_id,p,j); /* j could be 0 */
1064 }
1065 p+=j;
1066 c=ssl_get_cipher_by_char(s,p);
1067 if (c == NULL)
1068 {
1069 /* unknown cipher */
1070 al=SSL_AD_ILLEGAL_PARAMETER;
1071 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1072 goto f_err;
1073 }
1074 /* Set version disabled mask now we know version */
1075 if (!SSL_USE_TLS1_2_CIPHERS(s))
1076 ct->mask_ssl = SSL_TLSV1_2;
1077 else
1078 ct->mask_ssl = 0;
1079 /* If it is a disabled cipher we didn't send it in client hello,
1080 * so return an error.
1081 */
1082 if (c->algorithm_ssl & ct->mask_ssl ||
1083 c->algorithm_mkey & ct->mask_k ||
1084 c->algorithm_auth & ct->mask_a)
1085 {
1086 al=SSL_AD_ILLEGAL_PARAMETER;
1087 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1088 goto f_err;
1089 }
1090 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1091
1092 sk=ssl_get_ciphers_by_id(s);
1093 i=sk_SSL_CIPHER_find(sk,c);
1094 if (i < 0)
1095 {
1096 /* we did not say we would use this cipher */
1097 al=SSL_AD_ILLEGAL_PARAMETER;
1098 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1099 goto f_err;
1100 }
1101
1102 /* Depending on the session caching (internal/external), the cipher
1103 and/or cipher_id values may not be set. Make sure that
1104 cipher_id is set and use it for comparison. */
1105 if (s->session->cipher)
1106 s->session->cipher_id = s->session->cipher->id;
1107 if (s->hit && (s->session->cipher_id != c->id))
1108 {
1109 /* Workaround is now obsolete */
1110 #if 0
1111 if (!(s->options &
1112 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1113 #endif
1114 {
1115 al=SSL_AD_ILLEGAL_PARAMETER;
1116 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1117 goto f_err;
1118 }
1119 }
1120 s->s3->tmp.new_cipher=c;
1121 /* Don't digest cached records if no sigalgs: we may need them for
1122 * client authentication.
1123 */
1124 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1125 goto f_err;
1126 /* lets get the compression algorithm */
1127 /* COMPRESSION */
1128 #ifdef OPENSSL_NO_COMP
1129 if (*(p++) != 0)
1130 {
1131 al=SSL_AD_ILLEGAL_PARAMETER;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1133 goto f_err;
1134 }
1135 /* If compression is disabled we'd better not try to resume a session
1136 * using compression.
1137 */
1138 if (s->session->compress_meth != 0)
1139 {
1140 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1141 goto f_err;
1142 }
1143 #else
1144 j= *(p++);
1145 if (s->hit && j != s->session->compress_meth)
1146 {
1147 al=SSL_AD_ILLEGAL_PARAMETER;
1148 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1149 goto f_err;
1150 }
1151 if (j == 0)
1152 comp=NULL;
1153 else if (s->options & SSL_OP_NO_COMPRESSION)
1154 {
1155 al=SSL_AD_ILLEGAL_PARAMETER;
1156 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1157 goto f_err;
1158 }
1159 else
1160 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1161
1162 if ((j != 0) && (comp == NULL))
1163 {
1164 al=SSL_AD_ILLEGAL_PARAMETER;
1165 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1166 goto f_err;
1167 }
1168 else
1169 {
1170 s->s3->tmp.new_compression=comp;
1171 }
1172 #endif
1173
1174 #ifndef OPENSSL_NO_TLSEXT
1175 /* TLS extensions*/
1176 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1177 {
1178 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1179 goto err;
1180 }
1181 #endif
1182
1183 if (p != (d+n))
1184 {
1185 /* wrong packet length */
1186 al=SSL_AD_DECODE_ERROR;
1187 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1188 goto f_err;
1189 }
1190
1191 return(1);
1192 f_err:
1193 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1194 err:
1195 return(-1);
1196 }
1197
1198 int ssl3_get_server_certificate(SSL *s)
1199 {
1200 int al,i,ok,ret= -1;
1201 unsigned long n,nc,llen,l;
1202 X509 *x=NULL;
1203 const unsigned char *q,*p;
1204 unsigned char *d;
1205 STACK_OF(X509) *sk=NULL;
1206 SESS_CERT *sc;
1207 EVP_PKEY *pkey=NULL;
1208 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1209
1210 n=s->method->ssl_get_message(s,
1211 SSL3_ST_CR_CERT_A,
1212 SSL3_ST_CR_CERT_B,
1213 -1,
1214 s->max_cert_list,
1215 &ok);
1216
1217 if (!ok) return((int)n);
1218
1219 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1220 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1221 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1222 {
1223 s->s3->tmp.reuse_message=1;
1224 return(1);
1225 }
1226
1227 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1228 {
1229 al=SSL_AD_UNEXPECTED_MESSAGE;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1231 goto f_err;
1232 }
1233 p=d=(unsigned char *)s->init_msg;
1234
1235 if ((sk=sk_X509_new_null()) == NULL)
1236 {
1237 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1238 goto err;
1239 }
1240
1241 n2l3(p,llen);
1242 if (llen+3 != n)
1243 {
1244 al=SSL_AD_DECODE_ERROR;
1245 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1246 goto f_err;
1247 }
1248 for (nc=0; nc<llen; )
1249 {
1250 n2l3(p,l);
1251 if ((l+nc+3) > llen)
1252 {
1253 al=SSL_AD_DECODE_ERROR;
1254 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1255 goto f_err;
1256 }
1257
1258 q=p;
1259 x=d2i_X509(NULL,&q,l);
1260 if (x == NULL)
1261 {
1262 al=SSL_AD_BAD_CERTIFICATE;
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1264 goto f_err;
1265 }
1266 if (q != (p+l))
1267 {
1268 al=SSL_AD_DECODE_ERROR;
1269 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1270 goto f_err;
1271 }
1272 if (!sk_X509_push(sk,x))
1273 {
1274 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1275 goto err;
1276 }
1277 x=NULL;
1278 nc+=l+3;
1279 p=q;
1280 }
1281
1282 i=ssl_verify_cert_chain(s,sk);
1283 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1284 #ifndef OPENSSL_NO_KRB5
1285 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1286 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1287 #endif /* OPENSSL_NO_KRB5 */
1288 )
1289 {
1290 al=ssl_verify_alarm_type(s->verify_result);
1291 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1292 goto f_err;
1293 }
1294 ERR_clear_error(); /* but we keep s->verify_result */
1295
1296 sc=ssl_sess_cert_new();
1297 if (sc == NULL) goto err;
1298
1299 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1300 s->session->sess_cert=sc;
1301
1302 sc->cert_chain=sk;
1303 /* Inconsistency alert: cert_chain does include the peer's
1304 * certificate, which we don't include in s3_srvr.c */
1305 x=sk_X509_value(sk,0);
1306 sk=NULL;
1307 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1308
1309 pkey=X509_get_pubkey(x);
1310
1311 /* VRS: allow null cert if auth == KRB5 */
1312 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1313 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1314 ? 0 : 1;
1315
1316 #ifdef KSSL_DEBUG
1317 printf("pkey,x = %p, %p\n", pkey,x);
1318 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1319 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1320 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1321 #endif /* KSSL_DEBUG */
1322
1323 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1324 {
1325 x=NULL;
1326 al=SSL3_AL_FATAL;
1327 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1328 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1329 goto f_err;
1330 }
1331
1332 i=ssl_cert_type(x,pkey);
1333 if (need_cert && i < 0)
1334 {
1335 x=NULL;
1336 al=SSL3_AL_FATAL;
1337 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1338 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1339 goto f_err;
1340 }
1341
1342 if (need_cert)
1343 {
1344 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1345 if (exp_idx >= 0 && i != exp_idx)
1346 {
1347 x=NULL;
1348 al=SSL_AD_ILLEGAL_PARAMETER;
1349 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1350 SSL_R_WRONG_CERTIFICATE_TYPE);
1351 goto f_err;
1352 }
1353 sc->peer_cert_type=i;
1354 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1355 /* Why would the following ever happen?
1356 * We just created sc a couple of lines ago. */
1357 if (sc->peer_pkeys[i].x509 != NULL)
1358 X509_free(sc->peer_pkeys[i].x509);
1359 sc->peer_pkeys[i].x509=x;
1360 sc->peer_key= &(sc->peer_pkeys[i]);
1361
1362 if (s->session->peer != NULL)
1363 X509_free(s->session->peer);
1364 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1365 s->session->peer=x;
1366 }
1367 else
1368 {
1369 sc->peer_cert_type=i;
1370 sc->peer_key= NULL;
1371
1372 if (s->session->peer != NULL)
1373 X509_free(s->session->peer);
1374 s->session->peer=NULL;
1375 }
1376 s->session->verify_result = s->verify_result;
1377
1378 x=NULL;
1379 ret=1;
1380 if (0)
1381 {
1382 f_err:
1383 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1384 }
1385 err:
1386 EVP_PKEY_free(pkey);
1387 X509_free(x);
1388 sk_X509_pop_free(sk,X509_free);
1389 return(ret);
1390 }
1391
1392 int ssl3_get_key_exchange(SSL *s)
1393 {
1394 #ifndef OPENSSL_NO_RSA
1395 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1396 #endif
1397 EVP_MD_CTX md_ctx;
1398 unsigned char *param,*p;
1399 int al,i,j,param_len,ok;
1400 long n,alg_k,alg_a;
1401 EVP_PKEY *pkey=NULL;
1402 const EVP_MD *md = NULL;
1403 #ifndef OPENSSL_NO_RSA
1404 RSA *rsa=NULL;
1405 #endif
1406 #ifndef OPENSSL_NO_DH
1407 DH *dh=NULL;
1408 #endif
1409 #ifndef OPENSSL_NO_ECDH
1410 EC_KEY *ecdh = NULL;
1411 BN_CTX *bn_ctx = NULL;
1412 EC_POINT *srvr_ecpoint = NULL;
1413 int curve_nid = 0;
1414 int encoded_pt_len = 0;
1415 #endif
1416
1417 /* use same message size as in ssl3_get_certificate_request()
1418 * as ServerKeyExchange message may be skipped */
1419 n=s->method->ssl_get_message(s,
1420 SSL3_ST_CR_KEY_EXCH_A,
1421 SSL3_ST_CR_KEY_EXCH_B,
1422 -1,
1423 s->max_cert_list,
1424 &ok);
1425 if (!ok) return((int)n);
1426
1427 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1428 {
1429 #ifndef OPENSSL_NO_PSK
1430 /* In plain PSK ciphersuite, ServerKeyExchange can be
1431 omitted if no identity hint is sent. Set
1432 session->sess_cert anyway to avoid problems
1433 later.*/
1434 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1435 {
1436 s->session->sess_cert=ssl_sess_cert_new();
1437 if (s->ctx->psk_identity_hint)
1438 OPENSSL_free(s->ctx->psk_identity_hint);
1439 s->ctx->psk_identity_hint = NULL;
1440 }
1441 #endif
1442 s->s3->tmp.reuse_message=1;
1443 return(1);
1444 }
1445
1446 param=p=(unsigned char *)s->init_msg;
1447 if (s->session->sess_cert != NULL)
1448 {
1449 #ifndef OPENSSL_NO_RSA
1450 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1451 {
1452 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1453 s->session->sess_cert->peer_rsa_tmp=NULL;
1454 }
1455 #endif
1456 #ifndef OPENSSL_NO_DH
1457 if (s->session->sess_cert->peer_dh_tmp)
1458 {
1459 DH_free(s->session->sess_cert->peer_dh_tmp);
1460 s->session->sess_cert->peer_dh_tmp=NULL;
1461 }
1462 #endif
1463 #ifndef OPENSSL_NO_ECDH
1464 if (s->session->sess_cert->peer_ecdh_tmp)
1465 {
1466 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1467 s->session->sess_cert->peer_ecdh_tmp=NULL;
1468 }
1469 #endif
1470 }
1471 else
1472 {
1473 s->session->sess_cert=ssl_sess_cert_new();
1474 }
1475
1476 param_len=0;
1477 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1478 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1479 EVP_MD_CTX_init(&md_ctx);
1480
1481 #ifndef OPENSSL_NO_PSK
1482 if (alg_k & SSL_kPSK)
1483 {
1484 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1485
1486 al=SSL_AD_HANDSHAKE_FAILURE;
1487 n2s(p,i);
1488 param_len=i+2;
1489 /* Store PSK identity hint for later use, hint is used
1490 * in ssl3_send_client_key_exchange. Assume that the
1491 * maximum length of a PSK identity hint can be as
1492 * long as the maximum length of a PSK identity. */
1493 if (i > PSK_MAX_IDENTITY_LEN)
1494 {
1495 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1496 SSL_R_DATA_LENGTH_TOO_LONG);
1497 goto f_err;
1498 }
1499 if (param_len > n)
1500 {
1501 al=SSL_AD_DECODE_ERROR;
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1503 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1504 goto f_err;
1505 }
1506 /* If received PSK identity hint contains NULL
1507 * characters, the hint is truncated from the first
1508 * NULL. p may not be ending with NULL, so create a
1509 * NULL-terminated string. */
1510 memcpy(tmp_id_hint, p, i);
1511 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1512 if (s->ctx->psk_identity_hint != NULL)
1513 OPENSSL_free(s->ctx->psk_identity_hint);
1514 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1515 if (s->ctx->psk_identity_hint == NULL)
1516 {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1518 goto f_err;
1519 }
1520
1521 p+=i;
1522 n-=param_len;
1523 }
1524 else
1525 #endif /* !OPENSSL_NO_PSK */
1526 #ifndef OPENSSL_NO_SRP
1527 if (alg_k & SSL_kSRP)
1528 {
1529 n2s(p,i);
1530 param_len=i+2;
1531 if (param_len > n)
1532 {
1533 al=SSL_AD_DECODE_ERROR;
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1535 goto f_err;
1536 }
1537 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1538 {
1539 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1540 goto err;
1541 }
1542 p+=i;
1543
1544 n2s(p,i);
1545 param_len+=i+2;
1546 if (param_len > n)
1547 {
1548 al=SSL_AD_DECODE_ERROR;
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1550 goto f_err;
1551 }
1552 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1553 {
1554 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1555 goto err;
1556 }
1557 p+=i;
1558
1559 i = (unsigned int)(p[0]);
1560 p++;
1561 param_len+=i+1;
1562 if (param_len > n)
1563 {
1564 al=SSL_AD_DECODE_ERROR;
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1566 goto f_err;
1567 }
1568 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1569 {
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1571 goto err;
1572 }
1573 p+=i;
1574
1575 n2s(p,i);
1576 param_len+=i+2;
1577 if (param_len > n)
1578 {
1579 al=SSL_AD_DECODE_ERROR;
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1581 goto f_err;
1582 }
1583 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1584 {
1585 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1586 goto err;
1587 }
1588 p+=i;
1589 n-=param_len;
1590
1591 /* We must check if there is a certificate */
1592 #ifndef OPENSSL_NO_RSA
1593 if (alg_a & SSL_aRSA)
1594 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1595 #else
1596 if (0)
1597 ;
1598 #endif
1599 #ifndef OPENSSL_NO_DSA
1600 else if (alg_a & SSL_aDSS)
1601 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1602 #endif
1603 }
1604 else
1605 #endif /* !OPENSSL_NO_SRP */
1606 #ifndef OPENSSL_NO_RSA
1607 if (alg_k & SSL_kRSA)
1608 {
1609 if ((rsa=RSA_new()) == NULL)
1610 {
1611 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1612 goto err;
1613 }
1614 n2s(p,i);
1615 param_len=i+2;
1616 if (param_len > n)
1617 {
1618 al=SSL_AD_DECODE_ERROR;
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1620 goto f_err;
1621 }
1622 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1623 {
1624 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1625 goto err;
1626 }
1627 p+=i;
1628
1629 n2s(p,i);
1630 param_len+=i+2;
1631 if (param_len > n)
1632 {
1633 al=SSL_AD_DECODE_ERROR;
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1635 goto f_err;
1636 }
1637 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1638 {
1639 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1640 goto err;
1641 }
1642 p+=i;
1643 n-=param_len;
1644
1645 /* this should be because we are using an export cipher */
1646 if (alg_a & SSL_aRSA)
1647 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1648 else
1649 {
1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1651 goto err;
1652 }
1653 s->session->sess_cert->peer_rsa_tmp=rsa;
1654 rsa=NULL;
1655 }
1656 #else /* OPENSSL_NO_RSA */
1657 if (0)
1658 ;
1659 #endif
1660 #ifndef OPENSSL_NO_DH
1661 else if (alg_k & SSL_kDHE)
1662 {
1663 if ((dh=DH_new()) == NULL)
1664 {
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1666 goto err;
1667 }
1668 n2s(p,i);
1669 param_len=i+2;
1670 if (param_len > n)
1671 {
1672 al=SSL_AD_DECODE_ERROR;
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1674 goto f_err;
1675 }
1676 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1677 {
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1679 goto err;
1680 }
1681 p+=i;
1682
1683 n2s(p,i);
1684 param_len+=i+2;
1685 if (param_len > n)
1686 {
1687 al=SSL_AD_DECODE_ERROR;
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1689 goto f_err;
1690 }
1691 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1692 {
1693 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1694 goto err;
1695 }
1696 p+=i;
1697
1698 n2s(p,i);
1699 param_len+=i+2;
1700 if (param_len > n)
1701 {
1702 al=SSL_AD_DECODE_ERROR;
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1704 goto f_err;
1705 }
1706 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1707 {
1708 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1709 goto err;
1710 }
1711 p+=i;
1712 n-=param_len;
1713
1714 #ifndef OPENSSL_NO_RSA
1715 if (alg_a & SSL_aRSA)
1716 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1717 #else
1718 if (0)
1719 ;
1720 #endif
1721 #ifndef OPENSSL_NO_DSA
1722 else if (alg_a & SSL_aDSS)
1723 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1724 #endif
1725 /* else anonymous DH, so no certificate or pkey. */
1726
1727 s->session->sess_cert->peer_dh_tmp=dh;
1728 dh=NULL;
1729 }
1730 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1731 {
1732 al=SSL_AD_ILLEGAL_PARAMETER;
1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1734 goto f_err;
1735 }
1736 #endif /* !OPENSSL_NO_DH */
1737
1738 #ifndef OPENSSL_NO_ECDH
1739 else if (alg_k & SSL_kECDHE)
1740 {
1741 EC_GROUP *ngroup;
1742 const EC_GROUP *group;
1743
1744 if ((ecdh=EC_KEY_new()) == NULL)
1745 {
1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1747 goto err;
1748 }
1749
1750 /* Extract elliptic curve parameters and the
1751 * server's ephemeral ECDH public key.
1752 * Keep accumulating lengths of various components in
1753 * param_len and make sure it never exceeds n.
1754 */
1755
1756 /* XXX: For now we only support named (not generic) curves
1757 * and the ECParameters in this case is just three bytes.
1758 */
1759 param_len=3;
1760 /* Check curve is one of our preferences, if not server has
1761 * sent an invalid curve.
1762 */
1763 if (!tls1_check_curve(s, p, param_len))
1764 {
1765 al=SSL_AD_DECODE_ERROR;
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1767 goto f_err;
1768 }
1769
1770 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1771 {
1772 al=SSL_AD_INTERNAL_ERROR;
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1774 goto f_err;
1775 }
1776
1777 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1778 if (ngroup == NULL)
1779 {
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1781 goto err;
1782 }
1783 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1784 {
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1786 goto err;
1787 }
1788 EC_GROUP_free(ngroup);
1789
1790 group = EC_KEY_get0_group(ecdh);
1791
1792 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1793 (EC_GROUP_get_degree(group) > 163))
1794 {
1795 al=SSL_AD_EXPORT_RESTRICTION;
1796 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1797 goto f_err;
1798 }
1799
1800 p+=3;
1801
1802 /* Next, get the encoded ECPoint */
1803 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1804 ((bn_ctx = BN_CTX_new()) == NULL))
1805 {
1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1807 goto err;
1808 }
1809
1810 encoded_pt_len = *p; /* length of encoded point */
1811 p+=1;
1812 param_len += (1 + encoded_pt_len);
1813 if ((param_len > n) ||
1814 (EC_POINT_oct2point(group, srvr_ecpoint,
1815 p, encoded_pt_len, bn_ctx) == 0))
1816 {
1817 al=SSL_AD_DECODE_ERROR;
1818 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1819 goto f_err;
1820 }
1821
1822 n-=param_len;
1823 p+=encoded_pt_len;
1824
1825 /* The ECC/TLS specification does not mention
1826 * the use of DSA to sign ECParameters in the server
1827 * key exchange message. We do support RSA and ECDSA.
1828 */
1829 if (0) ;
1830 #ifndef OPENSSL_NO_RSA
1831 else if (alg_a & SSL_aRSA)
1832 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1833 #endif
1834 #ifndef OPENSSL_NO_ECDSA
1835 else if (alg_a & SSL_aECDSA)
1836 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1837 #endif
1838 /* else anonymous ECDH, so no certificate or pkey. */
1839 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1840 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1841 ecdh=NULL;
1842 BN_CTX_free(bn_ctx);
1843 bn_ctx = NULL;
1844 EC_POINT_free(srvr_ecpoint);
1845 srvr_ecpoint = NULL;
1846 }
1847 else if (alg_k)
1848 {
1849 al=SSL_AD_UNEXPECTED_MESSAGE;
1850 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1851 goto f_err;
1852 }
1853 #endif /* !OPENSSL_NO_ECDH */
1854
1855
1856 /* p points to the next byte, there are 'n' bytes left */
1857
1858 /* if it was signed, check the signature */
1859 if (pkey != NULL)
1860 {
1861 if (SSL_USE_SIGALGS(s))
1862 {
1863 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1864 if (rv == -1)
1865 goto err;
1866 else if (rv == 0)
1867 {
1868 al = SSL_AD_DECODE_ERROR;
1869 goto f_err;
1870 }
1871 #ifdef SSL_DEBUG
1872 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1873 #endif
1874 p += 2;
1875 n -= 2;
1876 }
1877 else
1878 md = EVP_sha1();
1879
1880 n2s(p,i);
1881 n-=2;
1882 j=EVP_PKEY_size(pkey);
1883
1884 if ((i != n) || (n > j) || (n <= 0))
1885 {
1886 /* wrong packet length */
1887 al=SSL_AD_DECODE_ERROR;
1888 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1889 goto f_err;
1890 }
1891
1892 #ifndef OPENSSL_NO_RSA
1893 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1894 {
1895 int num;
1896
1897 j=0;
1898 q=md_buf;
1899 for (num=2; num > 0; num--)
1900 {
1901 EVP_MD_CTX_set_flags(&md_ctx,
1902 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1903 EVP_DigestInit_ex(&md_ctx,(num == 2)
1904 ?s->ctx->md5:s->ctx->sha1, NULL);
1905 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1906 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1907 EVP_DigestUpdate(&md_ctx,param,param_len);
1908 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1909 q+=i;
1910 j+=i;
1911 }
1912 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1913 pkey->pkey.rsa);
1914 if (i < 0)
1915 {
1916 al=SSL_AD_DECRYPT_ERROR;
1917 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1918 goto f_err;
1919 }
1920 if (i == 0)
1921 {
1922 /* bad signature */
1923 al=SSL_AD_DECRYPT_ERROR;
1924 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1925 goto f_err;
1926 }
1927 }
1928 else
1929 #endif
1930 {
1931 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1932 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1933 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1934 EVP_VerifyUpdate(&md_ctx,param,param_len);
1935 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1936 {
1937 /* bad signature */
1938 al=SSL_AD_DECRYPT_ERROR;
1939 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1940 goto f_err;
1941 }
1942 }
1943 }
1944 else
1945 {
1946 /* aNULL or kPSK do not need public keys */
1947 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1948 {
1949 /* Might be wrong key type, check it */
1950 if (ssl3_check_cert_and_algorithm(s))
1951 /* Otherwise this shouldn't happen */
1952 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1953 goto err;
1954 }
1955 /* still data left over */
1956 if (n != 0)
1957 {
1958 al=SSL_AD_DECODE_ERROR;
1959 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1960 goto f_err;
1961 }
1962 }
1963 EVP_PKEY_free(pkey);
1964 EVP_MD_CTX_cleanup(&md_ctx);
1965 return(1);
1966 f_err:
1967 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1968 err:
1969 EVP_PKEY_free(pkey);
1970 #ifndef OPENSSL_NO_RSA
1971 if (rsa != NULL)
1972 RSA_free(rsa);
1973 #endif
1974 #ifndef OPENSSL_NO_DH
1975 if (dh != NULL)
1976 DH_free(dh);
1977 #endif
1978 #ifndef OPENSSL_NO_ECDH
1979 BN_CTX_free(bn_ctx);
1980 EC_POINT_free(srvr_ecpoint);
1981 if (ecdh != NULL)
1982 EC_KEY_free(ecdh);
1983 #endif
1984 EVP_MD_CTX_cleanup(&md_ctx);
1985 return(-1);
1986 }
1987
1988 int ssl3_get_certificate_request(SSL *s)
1989 {
1990 int ok,ret=0;
1991 unsigned long n,nc,l;
1992 unsigned int llen, ctype_num,i;
1993 X509_NAME *xn=NULL;
1994 const unsigned char *p,*q;
1995 unsigned char *d;
1996 STACK_OF(X509_NAME) *ca_sk=NULL;
1997
1998 n=s->method->ssl_get_message(s,
1999 SSL3_ST_CR_CERT_REQ_A,
2000 SSL3_ST_CR_CERT_REQ_B,
2001 -1,
2002 s->max_cert_list,
2003 &ok);
2004
2005 if (!ok) return((int)n);
2006
2007 s->s3->tmp.cert_req=0;
2008
2009 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2010 {
2011 s->s3->tmp.reuse_message=1;
2012 /* If we get here we don't need any cached handshake records
2013 * as we wont be doing client auth.
2014 */
2015 if (s->s3->handshake_buffer)
2016 {
2017 if (!ssl3_digest_cached_records(s))
2018 goto err;
2019 }
2020 return(1);
2021 }
2022
2023 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2024 {
2025 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2026 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2027 goto err;
2028 }
2029
2030 /* TLS does not like anon-DH with client cert */
2031 if (s->version > SSL3_VERSION)
2032 {
2033 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2034 {
2035 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2036 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2037 goto err;
2038 }
2039 }
2040
2041 p=d=(unsigned char *)s->init_msg;
2042
2043 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2044 {
2045 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2046 goto err;
2047 }
2048
2049 /* get the certificate types */
2050 ctype_num= *(p++);
2051 if (s->cert->ctypes)
2052 {
2053 OPENSSL_free(s->cert->ctypes);
2054 s->cert->ctypes = NULL;
2055 }
2056 if (ctype_num > SSL3_CT_NUMBER)
2057 {
2058 /* If we exceed static buffer copy all to cert structure */
2059 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2060 memcpy(s->cert->ctypes, p, ctype_num);
2061 s->cert->ctype_num = (size_t)ctype_num;
2062 ctype_num=SSL3_CT_NUMBER;
2063 }
2064 for (i=0; i<ctype_num; i++)
2065 s->s3->tmp.ctype[i]= p[i];
2066 p+=p[-1];
2067 if (SSL_USE_SIGALGS(s))
2068 {
2069 n2s(p, llen);
2070 /* Check we have enough room for signature algorithms and
2071 * following length value.
2072 */
2073 if ((unsigned long)(p - d + llen + 2) > n)
2074 {
2075 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2076 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2077 goto err;
2078 }
2079 /* Clear certificate digests and validity flags */
2080 for (i = 0; i < SSL_PKEY_NUM; i++)
2081 {
2082 s->cert->pkeys[i].digest = NULL;
2083 s->cert->pkeys[i].valid_flags = 0;
2084 }
2085 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2086 {
2087 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2089 goto err;
2090 }
2091 p += llen;
2092 }
2093
2094 /* get the CA RDNs */
2095 n2s(p,llen);
2096 #if 0
2097 {
2098 FILE *out;
2099 out=fopen("/tmp/vsign.der","w");
2100 fwrite(p,1,llen,out);
2101 fclose(out);
2102 }
2103 #endif
2104
2105 if ((unsigned long)(p - d + llen) != n)
2106 {
2107 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2108 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2109 goto err;
2110 }
2111
2112 for (nc=0; nc<llen; )
2113 {
2114 n2s(p,l);
2115 if ((l+nc+2) > llen)
2116 {
2117 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2118 goto cont; /* netscape bugs */
2119 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2120 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2121 goto err;
2122 }
2123
2124 q=p;
2125
2126 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2127 {
2128 /* If netscape tolerance is on, ignore errors */
2129 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2130 goto cont;
2131 else
2132 {
2133 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2134 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2135 goto err;
2136 }
2137 }
2138
2139 if (q != (p+l))
2140 {
2141 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2142 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2143 goto err;
2144 }
2145 if (!sk_X509_NAME_push(ca_sk,xn))
2146 {
2147 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2148 goto err;
2149 }
2150
2151 p+=l;
2152 nc+=l+2;
2153 }
2154
2155 if (0)
2156 {
2157 cont:
2158 ERR_clear_error();
2159 }
2160
2161 /* we should setup a certificate to return.... */
2162 s->s3->tmp.cert_req=1;
2163 s->s3->tmp.ctype_num=ctype_num;
2164 if (s->s3->tmp.ca_names != NULL)
2165 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2166 s->s3->tmp.ca_names=ca_sk;
2167 ca_sk=NULL;
2168
2169 ret=1;
2170 err:
2171 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2172 return(ret);
2173 }
2174
2175 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2176 {
2177 return(X509_NAME_cmp(*a,*b));
2178 }
2179 #ifndef OPENSSL_NO_TLSEXT
2180 int ssl3_get_new_session_ticket(SSL *s)
2181 {
2182 int ok,al,ret=0, ticklen;
2183 long n;
2184 const unsigned char *p;
2185 unsigned char *d;
2186
2187 n=s->method->ssl_get_message(s,
2188 SSL3_ST_CR_SESSION_TICKET_A,
2189 SSL3_ST_CR_SESSION_TICKET_B,
2190 -1,
2191 16384,
2192 &ok);
2193
2194 if (!ok)
2195 return((int)n);
2196
2197 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2198 {
2199 s->s3->tmp.reuse_message=1;
2200 return(1);
2201 }
2202 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2203 {
2204 al=SSL_AD_UNEXPECTED_MESSAGE;
2205 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2206 goto f_err;
2207 }
2208 if (n < 6)
2209 {
2210 /* need at least ticket_lifetime_hint + ticket length */
2211 al = SSL_AD_DECODE_ERROR;
2212 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2213 goto f_err;
2214 }
2215
2216 p=d=(unsigned char *)s->init_msg;
2217 n2l(p, s->session->tlsext_tick_lifetime_hint);
2218 n2s(p, ticklen);
2219 /* ticket_lifetime_hint + ticket_length + ticket */
2220 if (ticklen + 6 != n)
2221 {
2222 al = SSL_AD_DECODE_ERROR;
2223 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2224 goto f_err;
2225 }
2226 if (s->session->tlsext_tick)
2227 {
2228 OPENSSL_free(s->session->tlsext_tick);
2229 s->session->tlsext_ticklen = 0;
2230 }
2231 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2232 if (!s->session->tlsext_tick)
2233 {
2234 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2235 goto err;
2236 }
2237 memcpy(s->session->tlsext_tick, p, ticklen);
2238 s->session->tlsext_ticklen = ticklen;
2239 /* There are two ways to detect a resumed ticket sesion.
2240 * One is to set an appropriate session ID and then the server
2241 * must return a match in ServerHello. This allows the normal
2242 * client session ID matching to work and we know much
2243 * earlier that the ticket has been accepted.
2244 *
2245 * The other way is to set zero length session ID when the
2246 * ticket is presented and rely on the handshake to determine
2247 * session resumption.
2248 *
2249 * We choose the former approach because this fits in with
2250 * assumptions elsewhere in OpenSSL. The session ID is set
2251 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2252 * ticket.
2253 */
2254 EVP_Digest(p, ticklen,
2255 s->session->session_id, &s->session->session_id_length,
2256 #ifndef OPENSSL_NO_SHA256
2257 EVP_sha256(), NULL);
2258 #else
2259 EVP_sha1(), NULL);
2260 #endif
2261 ret=1;
2262 return(ret);
2263 f_err:
2264 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2265 err:
2266 return(-1);
2267 }
2268
2269 int ssl3_get_cert_status(SSL *s)
2270 {
2271 int ok, al;
2272 unsigned long resplen,n;
2273 const unsigned char *p;
2274
2275 n=s->method->ssl_get_message(s,
2276 SSL3_ST_CR_CERT_STATUS_A,
2277 SSL3_ST_CR_CERT_STATUS_B,
2278 SSL3_MT_CERTIFICATE_STATUS,
2279 16384,
2280 &ok);
2281
2282 if (!ok) return((int)n);
2283 if (n < 4)
2284 {
2285 /* need at least status type + length */
2286 al = SSL_AD_DECODE_ERROR;
2287 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2288 goto f_err;
2289 }
2290 p = (unsigned char *)s->init_msg;
2291 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2292 {
2293 al = SSL_AD_DECODE_ERROR;
2294 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2295 goto f_err;
2296 }
2297 n2l3(p, resplen);
2298 if (resplen + 4 != n)
2299 {
2300 al = SSL_AD_DECODE_ERROR;
2301 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2302 goto f_err;
2303 }
2304 if (s->tlsext_ocsp_resp)
2305 OPENSSL_free(s->tlsext_ocsp_resp);
2306 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2307 if (!s->tlsext_ocsp_resp)
2308 {
2309 al = SSL_AD_INTERNAL_ERROR;
2310 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2311 goto f_err;
2312 }
2313 s->tlsext_ocsp_resplen = resplen;
2314 if (s->ctx->tlsext_status_cb)
2315 {
2316 int ret;
2317 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2318 if (ret == 0)
2319 {
2320 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2321 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2322 goto f_err;
2323 }
2324 if (ret < 0)
2325 {
2326 al = SSL_AD_INTERNAL_ERROR;
2327 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2328 goto f_err;
2329 }
2330 }
2331 return 1;
2332 f_err:
2333 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2334 return(-1);
2335 }
2336 #endif
2337
2338 int ssl3_get_server_done(SSL *s)
2339 {
2340 int ok,ret=0;
2341 long n;
2342
2343 n=s->method->ssl_get_message(s,
2344 SSL3_ST_CR_SRVR_DONE_A,
2345 SSL3_ST_CR_SRVR_DONE_B,
2346 SSL3_MT_SERVER_DONE,
2347 30, /* should be very small, like 0 :-) */
2348 &ok);
2349
2350 if (!ok) return((int)n);
2351 if (n > 0)
2352 {
2353 /* should contain no data */
2354 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2355 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2356 return -1;
2357 }
2358 ret=1;
2359 return(ret);
2360 }
2361
2362
2363 int ssl3_send_client_key_exchange(SSL *s)
2364 {
2365 unsigned char *p;
2366 int n;
2367 unsigned long alg_k;
2368 #ifndef OPENSSL_NO_RSA
2369 unsigned char *q;
2370 EVP_PKEY *pkey=NULL;
2371 #endif
2372 #ifndef OPENSSL_NO_KRB5
2373 KSSL_ERR kssl_err;
2374 #endif /* OPENSSL_NO_KRB5 */
2375 #ifndef OPENSSL_NO_ECDH
2376 EC_KEY *clnt_ecdh = NULL;
2377 const EC_POINT *srvr_ecpoint = NULL;
2378 EVP_PKEY *srvr_pub_pkey = NULL;
2379 unsigned char *encodedPoint = NULL;
2380 int encoded_pt_len = 0;
2381 BN_CTX * bn_ctx = NULL;
2382 #endif
2383
2384 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2385 {
2386 p = ssl_handshake_start(s);
2387
2388 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2389
2390 /* Fool emacs indentation */
2391 if (0) {}
2392 #ifndef OPENSSL_NO_RSA
2393 else if (alg_k & SSL_kRSA)
2394 {
2395 RSA *rsa;
2396 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2397
2398 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2399 rsa=s->session->sess_cert->peer_rsa_tmp;
2400 else
2401 {
2402 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2403 if ((pkey == NULL) ||
2404 (pkey->type != EVP_PKEY_RSA) ||
2405 (pkey->pkey.rsa == NULL))
2406 {
2407 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2408 goto err;
2409 }
2410 rsa=pkey->pkey.rsa;
2411 EVP_PKEY_free(pkey);
2412 }
2413
2414 tmp_buf[0]=s->client_version>>8;
2415 tmp_buf[1]=s->client_version&0xff;
2416 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2417 goto err;
2418
2419 s->session->master_key_length=sizeof tmp_buf;
2420
2421 q=p;
2422 /* Fix buf for TLS and beyond */
2423 if (s->version > SSL3_VERSION)
2424 p+=2;
2425 n=RSA_public_encrypt(sizeof tmp_buf,
2426 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2427 #ifdef PKCS1_CHECK
2428 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2429 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2430 #endif
2431 if (n <= 0)
2432 {
2433 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2434 goto err;
2435 }
2436
2437 /* Fix buf for TLS and beyond */
2438 if (s->version > SSL3_VERSION)
2439 {
2440 s2n(n,q);
2441 n+=2;
2442 }
2443
2444 s->session->master_key_length=
2445 s->method->ssl3_enc->generate_master_secret(s,
2446 s->session->master_key,
2447 tmp_buf,sizeof tmp_buf);
2448 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2449 }
2450 #endif
2451 #ifndef OPENSSL_NO_KRB5
2452 else if (alg_k & SSL_kKRB5)
2453 {
2454 krb5_error_code krb5rc;
2455 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2456 /* krb5_data krb5_ap_req; */
2457 krb5_data *enc_ticket;
2458 krb5_data authenticator, *authp = NULL;
2459 EVP_CIPHER_CTX ciph_ctx;
2460 const EVP_CIPHER *enc = NULL;
2461 unsigned char iv[EVP_MAX_IV_LENGTH];
2462 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2463 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2464 + EVP_MAX_IV_LENGTH];
2465 int padl, outl = sizeof(epms);
2466
2467 EVP_CIPHER_CTX_init(&ciph_ctx);
2468
2469 #ifdef KSSL_DEBUG
2470 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2471 alg_k, SSL_kKRB5);
2472 #endif /* KSSL_DEBUG */
2473
2474 authp = NULL;
2475 #ifdef KRB5SENDAUTH
2476 if (KRB5SENDAUTH) authp = &authenticator;
2477 #endif /* KRB5SENDAUTH */
2478
2479 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2480 &kssl_err);
2481 enc = kssl_map_enc(kssl_ctx->enctype);
2482 if (enc == NULL)
2483 goto err;
2484 #ifdef KSSL_DEBUG
2485 {
2486 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2487 if (krb5rc && kssl_err.text)
2488 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2489 }
2490 #endif /* KSSL_DEBUG */
2491
2492 if (krb5rc)
2493 {
2494 ssl3_send_alert(s,SSL3_AL_FATAL,
2495 SSL_AD_HANDSHAKE_FAILURE);
2496 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2497 kssl_err.reason);
2498 goto err;
2499 }
2500
2501 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2502 ** in place of RFC 2712 KerberosWrapper, as in:
2503 **
2504 ** Send ticket (copy to *p, set n = length)
2505 ** n = krb5_ap_req.length;
2506 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2507 ** if (krb5_ap_req.data)
2508 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2509 **
2510 ** Now using real RFC 2712 KerberosWrapper
2511 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2512 ** Note: 2712 "opaque" types are here replaced
2513 ** with a 2-byte length followed by the value.
2514 ** Example:
2515 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2516 ** Where "xx xx" = length bytes. Shown here with
2517 ** optional authenticator omitted.
2518 */
2519
2520 /* KerberosWrapper.Ticket */
2521 s2n(enc_ticket->length,p);
2522 memcpy(p, enc_ticket->data, enc_ticket->length);
2523 p+= enc_ticket->length;
2524 n = enc_ticket->length + 2;
2525
2526 /* KerberosWrapper.Authenticator */
2527 if (authp && authp->length)
2528 {
2529 s2n(authp->length,p);
2530 memcpy(p, authp->data, authp->length);
2531 p+= authp->length;
2532 n+= authp->length + 2;
2533
2534 free(authp->data);
2535 authp->data = NULL;
2536 authp->length = 0;
2537 }
2538 else
2539 {
2540 s2n(0,p);/* null authenticator length */
2541 n+=2;
2542 }
2543
2544 tmp_buf[0]=s->client_version>>8;
2545 tmp_buf[1]=s->client_version&0xff;
2546 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2547 goto err;
2548
2549 /* 20010420 VRS. Tried it this way; failed.
2550 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2551 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2552 ** kssl_ctx->length);
2553 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2554 */
2555
2556 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2557 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2558 kssl_ctx->key,iv);
2559 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2560 sizeof tmp_buf);
2561 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2562 outl += padl;
2563 if (outl > (int)sizeof epms)
2564 {
2565 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2566 goto err;
2567 }
2568 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2569
2570 /* KerberosWrapper.EncryptedPreMasterSecret */
2571 s2n(outl,p);
2572 memcpy(p, epms, outl);
2573 p+=outl;
2574 n+=outl + 2;
2575
2576 s->session->master_key_length=
2577 s->method->ssl3_enc->generate_master_secret(s,
2578 s->session->master_key,
2579 tmp_buf, sizeof tmp_buf);
2580
2581 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2582 OPENSSL_cleanse(epms, outl);
2583 }
2584 #endif
2585 #ifndef OPENSSL_NO_DH
2586 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2587 {
2588 DH *dh_srvr,*dh_clnt;
2589 SESS_CERT *scert = s->session->sess_cert;
2590
2591 if (scert == NULL)
2592 {
2593 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2595 goto err;
2596 }
2597
2598 if (scert->peer_dh_tmp != NULL)
2599 dh_srvr=scert->peer_dh_tmp;
2600 else
2601 {
2602 /* we get them from the cert */
2603 int idx = scert->peer_cert_type;
2604 EVP_PKEY *spkey = NULL;
2605 dh_srvr = NULL;
2606 if (idx >= 0)
2607 spkey = X509_get_pubkey(
2608 scert->peer_pkeys[idx].x509);
2609 if (spkey)
2610 {
2611 dh_srvr = EVP_PKEY_get1_DH(spkey);
2612 EVP_PKEY_free(spkey);
2613 }
2614 if (dh_srvr == NULL)
2615 {
2616 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2617 ERR_R_INTERNAL_ERROR);
2618 goto err;
2619 }
2620 }
2621 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2622 {
2623 /* Use client certificate key */
2624 EVP_PKEY *clkey = s->cert->key->privatekey;
2625 dh_clnt = NULL;
2626 if (clkey)
2627 dh_clnt = EVP_PKEY_get1_DH(clkey);
2628 if (dh_clnt == NULL)
2629 {
2630 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2631 ERR_R_INTERNAL_ERROR);
2632 goto err;
2633 }
2634 }
2635 else
2636 {
2637 /* generate a new random key */
2638 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2639 {
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2641 goto err;
2642 }
2643 if (!DH_generate_key(dh_clnt))
2644 {
2645 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2646 DH_free(dh_clnt);
2647 goto err;
2648 }
2649 }
2650
2651 /* use the 'p' output buffer for the DH key, but
2652 * make sure to clear it out afterwards */
2653
2654 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2655 if (scert->peer_dh_tmp == NULL)
2656 DH_free(dh_srvr);
2657
2658 if (n <= 0)
2659 {
2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2661 DH_free(dh_clnt);
2662 goto err;
2663 }
2664
2665 /* generate master key from the result */
2666 s->session->master_key_length=
2667 s->method->ssl3_enc->generate_master_secret(s,
2668 s->session->master_key,p,n);
2669 /* clean up */
2670 memset(p,0,n);
2671
2672 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2673 n = 0;
2674 else
2675 {
2676 /* send off the data */
2677 n=BN_num_bytes(dh_clnt->pub_key);
2678 s2n(n,p);
2679 BN_bn2bin(dh_clnt->pub_key,p);
2680 n+=2;
2681 }
2682
2683 DH_free(dh_clnt);
2684
2685 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2686 }
2687 #endif
2688
2689 #ifndef OPENSSL_NO_ECDH
2690 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2691 {
2692 const EC_GROUP *srvr_group = NULL;
2693 EC_KEY *tkey;
2694 int ecdh_clnt_cert = 0;
2695 int field_size = 0;
2696
2697 /* Did we send out the client's
2698 * ECDH share for use in premaster
2699 * computation as part of client certificate?
2700 * If so, set ecdh_clnt_cert to 1.
2701 */
2702 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2703 {
2704 /* XXX: For now, we do not support client
2705 * authentication using ECDH certificates.
2706 * To add such support, one needs to add
2707 * code that checks for appropriate
2708 * conditions and sets ecdh_clnt_cert to 1.
2709 * For example, the cert have an ECC
2710 * key on the same curve as the server's
2711 * and the key should be authorized for
2712 * key agreement.
2713 *
2714 * One also needs to add code in ssl3_connect
2715 * to skip sending the certificate verify
2716 * message.
2717 *
2718 * if ((s->cert->key->privatekey != NULL) &&
2719 * (s->cert->key->privatekey->type ==
2720 * EVP_PKEY_EC) && ...)
2721 * ecdh_clnt_cert = 1;
2722 */
2723 }
2724
2725 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2726 {
2727 tkey = s->session->sess_cert->peer_ecdh_tmp;
2728 }
2729 else
2730 {
2731 /* Get the Server Public Key from Cert */
2732 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2733 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2734 if ((srvr_pub_pkey == NULL) ||
2735 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2736 (srvr_pub_pkey->pkey.ec == NULL))
2737 {
2738 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2739 ERR_R_INTERNAL_ERROR);
2740 goto err;
2741 }
2742
2743 tkey = srvr_pub_pkey->pkey.ec;
2744 }
2745
2746 srvr_group = EC_KEY_get0_group(tkey);
2747 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2748
2749 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2750 {
2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2752 ERR_R_INTERNAL_ERROR);
2753 goto err;
2754 }
2755
2756 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2757 {
2758 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2759 goto err;
2760 }
2761
2762 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2763 {
2764 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2765 goto err;
2766 }
2767 if (ecdh_clnt_cert)
2768 {
2769 /* Reuse key info from our certificate
2770 * We only need our private key to perform
2771 * the ECDH computation.
2772 */
2773 const BIGNUM *priv_key;
2774 tkey = s->cert->key->privatekey->pkey.ec;
2775 priv_key = EC_KEY_get0_private_key(tkey);
2776 if (priv_key == NULL)
2777 {
2778 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2779 goto err;
2780 }
2781 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2782 {
2783 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2784 goto err;
2785 }
2786 }
2787 else
2788 {
2789 /* Generate a new ECDH key pair */
2790 if (!(EC_KEY_generate_key(clnt_ecdh)))
2791 {
2792 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2793 goto err;
2794 }
2795 }
2796
2797 /* use the 'p' output buffer for the ECDH key, but
2798 * make sure to clear it out afterwards
2799 */
2800
2801 field_size = EC_GROUP_get_degree(srvr_group);
2802 if (field_size <= 0)
2803 {
2804 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2805 ERR_R_ECDH_LIB);
2806 goto err;
2807 }
2808 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2809 if (n <= 0)
2810 {
2811 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2812 ERR_R_ECDH_LIB);
2813 goto err;
2814 }
2815
2816 /* generate master key from the result */
2817 s->session->master_key_length = s->method->ssl3_enc \
2818 -> generate_master_secret(s,
2819 s->session->master_key,
2820 p, n);
2821
2822 memset(p, 0, n); /* clean up */
2823
2824 if (ecdh_clnt_cert)
2825 {
2826 /* Send empty client key exch message */
2827 n = 0;
2828 }
2829 else
2830 {
2831 /* First check the size of encoding and
2832 * allocate memory accordingly.
2833 */
2834 encoded_pt_len =
2835 EC_POINT_point2oct(srvr_group,
2836 EC_KEY_get0_public_key(clnt_ecdh),
2837 POINT_CONVERSION_UNCOMPRESSED,
2838 NULL, 0, NULL);
2839
2840 encodedPoint = (unsigned char *)
2841 OPENSSL_malloc(encoded_pt_len *
2842 sizeof(unsigned char));
2843 bn_ctx = BN_CTX_new();
2844 if ((encodedPoint == NULL) ||
2845 (bn_ctx == NULL))
2846 {
2847 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2848 goto err;
2849 }
2850
2851 /* Encode the public key */
2852 n = EC_POINT_point2oct(srvr_group,
2853 EC_KEY_get0_public_key(clnt_ecdh),
2854 POINT_CONVERSION_UNCOMPRESSED,
2855 encodedPoint, encoded_pt_len, bn_ctx);
2856
2857 *p = n; /* length of encoded point */
2858 /* Encoded point will be copied here */
2859 p += 1;
2860 /* copy the point */
2861 memcpy((unsigned char *)p, encodedPoint, n);
2862 /* increment n to account for length field */
2863 n += 1;
2864 }
2865
2866 /* Free allocated memory */
2867 BN_CTX_free(bn_ctx);
2868 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2869 if (clnt_ecdh != NULL)
2870 EC_KEY_free(clnt_ecdh);
2871 EVP_PKEY_free(srvr_pub_pkey);
2872 }
2873 #endif /* !OPENSSL_NO_ECDH */
2874 else if (alg_k & SSL_kGOST)
2875 {
2876 /* GOST key exchange message creation */
2877 EVP_PKEY_CTX *pkey_ctx;
2878 X509 *peer_cert;
2879 size_t msglen;
2880 unsigned int md_len;
2881 int keytype;
2882 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2883 EVP_MD_CTX *ukm_hash;
2884 EVP_PKEY *pub_key;
2885
2886 /* Get server sertificate PKEY and create ctx from it */
2887 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2888 if (!peer_cert)
2889 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2890 if (!peer_cert) {
2891 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2892 goto err;
2893 }
2894
2895 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2896 /* If we have send a certificate, and certificate key
2897
2898 * parameters match those of server certificate, use
2899 * certificate key for key exchange
2900 */
2901
2902 /* Otherwise, generate ephemeral key pair */
2903
2904 EVP_PKEY_encrypt_init(pkey_ctx);
2905 /* Generate session key */
2906 RAND_bytes(premaster_secret,32);
2907 /* If we have client certificate, use its secret as peer key */
2908 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2909 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2910 /* If there was an error - just ignore it. Ephemeral key
2911 * would be used
2912 */
2913 ERR_clear_error();
2914 }
2915 }
2916 /* Compute shared IV and store it in algorithm-specific
2917 * context data */
2918 ukm_hash = EVP_MD_CTX_create();
2919 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2920 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2921 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2922 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2923 EVP_MD_CTX_destroy(ukm_hash);
2924 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2925 8,shared_ukm)<0) {
2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2927 SSL_R_LIBRARY_BUG);
2928 goto err;
2929 }
2930 /* Make GOST keytransport blob message */
2931 /*Encapsulate it into sequence */
2932 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2933 msglen=255;
2934 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2935 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2936 SSL_R_LIBRARY_BUG);
2937 goto err;
2938 }
2939 if (msglen >= 0x80)
2940 {
2941 *(p++)=0x81;
2942 *(p++)= msglen & 0xff;
2943 n=msglen+3;
2944 }
2945 else
2946 {
2947 *(p++)= msglen & 0xff;
2948 n=msglen+2;
2949 }
2950 memcpy(p, tmp, msglen);
2951 /* Check if pubkey from client certificate was used */
2952 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2953 {
2954 /* Set flag "skip certificate verify" */
2955 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2956 }
2957 EVP_PKEY_CTX_free(pkey_ctx);
2958 s->session->master_key_length=
2959 s->method->ssl3_enc->generate_master_secret(s,
2960 s->session->master_key,premaster_secret,32);
2961 EVP_PKEY_free(pub_key);
2962
2963 }
2964 #ifndef OPENSSL_NO_SRP
2965 else if (alg_k & SSL_kSRP)
2966 {
2967 if (s->srp_ctx.A != NULL)
2968 {
2969 /* send off the data */
2970 n=BN_num_bytes(s->srp_ctx.A);
2971 s2n(n,p);
2972 BN_bn2bin(s->srp_ctx.A,p);
2973 n+=2;
2974 }
2975 else
2976 {
2977 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2978 goto err;
2979 }
2980 if (s->session->srp_username != NULL)
2981 OPENSSL_free(s->session->srp_username);
2982 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2983 if (s->session->srp_username == NULL)
2984 {
2985 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2986 ERR_R_MALLOC_FAILURE);
2987 goto err;
2988 }
2989
2990 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2991 {
2992 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2993 goto err;
2994 }
2995 }
2996 #endif
2997 #ifndef OPENSSL_NO_PSK
2998 else if (alg_k & SSL_kPSK)
2999 {
3000 char identity[PSK_MAX_IDENTITY_LEN];
3001 unsigned char *t = NULL;
3002 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3003 unsigned int pre_ms_len = 0, psk_len = 0;
3004 int psk_err = 1;
3005
3006 n = 0;
3007 if (s->psk_client_callback == NULL)
3008 {
3009 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3010 SSL_R_PSK_NO_CLIENT_CB);
3011 goto err;
3012 }
3013
3014 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3015 identity, PSK_MAX_IDENTITY_LEN,
3016 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3017 if (psk_len > PSK_MAX_PSK_LEN)
3018 {
3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3020 ERR_R_INTERNAL_ERROR);
3021 goto psk_err;
3022 }
3023 else if (psk_len == 0)
3024 {
3025 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3026 SSL_R_PSK_IDENTITY_NOT_FOUND);
3027 goto psk_err;
3028 }
3029
3030 /* create PSK pre_master_secret */
3031 pre_ms_len = 2+psk_len+2+psk_len;
3032 t = psk_or_pre_ms;
3033 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3034 s2n(psk_len, t);
3035 memset(t, 0, psk_len);
3036 t+=psk_len;
3037 s2n(psk_len, t);
3038
3039 if (s->session->psk_identity_hint != NULL)
3040 OPENSSL_free(s->session->psk_identity_hint);
3041 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3042 if (s->ctx->psk_identity_hint != NULL &&
3043 s->session->psk_identity_hint == NULL)
3044 {
3045 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3046 ERR_R_MALLOC_FAILURE);
3047 goto psk_err;
3048 }
3049
3050 if (s->session->psk_identity != NULL)
3051 OPENSSL_free(s->session->psk_identity);
3052 s->session->psk_identity = BUF_strdup(identity);
3053 if (s->session->psk_identity == NULL)
3054 {
3055 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3056 ERR_R_MALLOC_FAILURE);
3057 goto psk_err;
3058 }
3059
3060 s->session->master_key_length =
3061 s->method->ssl3_enc->generate_master_secret(s,
3062 s->session->master_key,
3063 psk_or_pre_ms, pre_ms_len);
3064 n = strlen(identity);
3065 s2n(n, p);
3066 memcpy(p, identity, n);
3067 n+=2;
3068 psk_err = 0;
3069 psk_err:
3070 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3071 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3072 if (psk_err != 0)
3073 {
3074 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3075 goto err;
3076 }
3077 }
3078 #endif
3079 else
3080 {
3081 ssl3_send_alert(s, SSL3_AL_FATAL,
3082 SSL_AD_HANDSHAKE_FAILURE);
3083 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3084 ERR_R_INTERNAL_ERROR);
3085 goto err;
3086 }
3087
3088 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3089 s->state=SSL3_ST_CW_KEY_EXCH_B;
3090 }
3091
3092 /* SSL3_ST_CW_KEY_EXCH_B */
3093 return ssl_do_write(s);
3094 err:
3095 #ifndef OPENSSL_NO_ECDH
3096 BN_CTX_free(bn_ctx);
3097 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3098 if (clnt_ecdh != NULL)
3099 EC_KEY_free(clnt_ecdh);
3100 EVP_PKEY_free(srvr_pub_pkey);
3101 #endif
3102 return(-1);
3103 }
3104
3105 int ssl3_send_client_verify(SSL *s)
3106 {
3107 unsigned char *p;
3108 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3109 EVP_PKEY *pkey;
3110 EVP_PKEY_CTX *pctx=NULL;
3111 EVP_MD_CTX mctx;
3112 unsigned u=0;
3113 unsigned long n;
3114 int j;
3115
3116 EVP_MD_CTX_init(&mctx);
3117
3118 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3119 {
3120 p= ssl_handshake_start(s);
3121 pkey=s->cert->key->privatekey;
3122 /* Create context from key and test if sha1 is allowed as digest */
3123 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3124 EVP_PKEY_sign_init(pctx);
3125 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3126 {
3127 if (!SSL_USE_SIGALGS(s))
3128 s->method->ssl3_enc->cert_verify_mac(s,
3129 NID_sha1,
3130 &(data[MD5_DIGEST_LENGTH]));
3131 }
3132 else
3133 {
3134 ERR_clear_error();
3135 }
3136 /* For TLS v1.2 send signature algorithm and signature
3137 * using agreed digest and cached handshake records.
3138 */
3139 if (SSL_USE_SIGALGS(s))
3140 {
3141 long hdatalen = 0;
3142 void *hdata;
3143 const EVP_MD *md = s->cert->key->digest;
3144 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3145 &hdata);
3146 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3147 {
3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3149 ERR_R_INTERNAL_ERROR);
3150 goto err;
3151 }
3152 p += 2;
3153 #ifdef SSL_DEBUG
3154 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3155 EVP_MD_name(md));
3156 #endif
3157 if (!EVP_SignInit_ex(&mctx, md, NULL)
3158 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3159 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3160 {
3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3162 ERR_R_EVP_LIB);
3163 goto err;
3164 }
3165 s2n(u,p);
3166 n = u + 4;
3167 if (!ssl3_digest_cached_records(s))
3168 goto err;
3169 }
3170 else
3171 #ifndef OPENSSL_NO_RSA
3172 if (pkey->type == EVP_PKEY_RSA)
3173 {
3174 s->method->ssl3_enc->cert_verify_mac(s,
3175 NID_md5,
3176 &(data[0]));
3177 if (RSA_sign(NID_md5_sha1, data,
3178 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3179 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3180 {
3181 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3182 goto err;
3183 }
3184 s2n(u,p);
3185 n=u+2;
3186 }
3187 else
3188 #endif
3189 #ifndef OPENSSL_NO_DSA
3190 if (pkey->type == EVP_PKEY_DSA)
3191 {
3192 if (!DSA_sign(pkey->save_type,
3193 &(data[MD5_DIGEST_LENGTH]),
3194 SHA_DIGEST_LENGTH,&(p[2]),
3195 (unsigned int *)&j,pkey->pkey.dsa))
3196 {
3197 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3198 goto err;
3199 }
3200 s2n(j,p);
3201 n=j+2;
3202 }
3203 else
3204 #endif
3205 #ifndef OPENSSL_NO_ECDSA
3206 if (pkey->type == EVP_PKEY_EC)
3207 {
3208 if (!ECDSA_sign(pkey->save_type,
3209 &(data[MD5_DIGEST_LENGTH]),
3210 SHA_DIGEST_LENGTH,&(p[2]),
3211 (unsigned int *)&j,pkey->pkey.ec))
3212 {
3213 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3214 ERR_R_ECDSA_LIB);
3215 goto err;
3216 }
3217 s2n(j,p);
3218 n=j+2;
3219 }
3220 else
3221 #endif
3222 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3223 {
3224 unsigned char signbuf[64];
3225 int i;
3226 size_t sigsize=64;
3227 s->method->ssl3_enc->cert_verify_mac(s,
3228 NID_id_GostR3411_94,
3229 data);
3230 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3231 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3232 ERR_R_INTERNAL_ERROR);
3233 goto err;
3234 }
3235 for (i=63,j=0; i>=0; j++, i--) {
3236 p[2+j]=signbuf[i];
3237 }
3238 s2n(j,p);
3239 n=j+2;
3240 }
3241 else
3242 {
3243 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3244 goto err;
3245 }
3246 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3247 s->state=SSL3_ST_CW_CERT_VRFY_B;
3248 }
3249 EVP_MD_CTX_cleanup(&mctx);
3250 EVP_PKEY_CTX_free(pctx);
3251 return ssl_do_write(s);
3252 err:
3253 EVP_MD_CTX_cleanup(&mctx);
3254 EVP_PKEY_CTX_free(pctx);
3255 return(-1);
3256 }
3257
3258 /* Check a certificate can be used for client authentication. Currently
3259 * check cert exists, if we have a suitable digest for TLS 1.2 if
3260 * static DH client certificates can be used and optionally checks
3261 * suitability for Suite B.
3262 */
3263 static int ssl3_check_client_certificate(SSL *s)
3264 {
3265 unsigned long alg_k;
3266 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3267 return 0;
3268 /* If no suitable signature algorithm can't use certificate */
3269 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3270 return 0;
3271 /* If strict mode check suitability of chain before using it.
3272 * This also adjusts suite B digest if necessary.
3273 */
3274 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3275 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3276 return 0;
3277 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3278 /* See if we can use client certificate for fixed DH */
3279 if (alg_k & (SSL_kDHr|SSL_kDHd))
3280 {
3281 SESS_CERT *scert = s->session->sess_cert;
3282 int i = scert->peer_cert_type;
3283 EVP_PKEY *clkey = NULL, *spkey = NULL;
3284 clkey = s->cert->key->privatekey;
3285 /* If client key not DH assume it can be used */
3286 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3287 return 1;
3288 if (i >= 0)
3289 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3290 if (spkey)
3291 {
3292 /* Compare server and client parameters */
3293 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3294 EVP_PKEY_free(spkey);
3295 if (i != 1)
3296 return 0;
3297 }
3298 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3299 }
3300 return 1;
3301 }
3302
3303 int ssl3_send_client_certificate(SSL *s)
3304 {
3305 X509 *x509=NULL;
3306 EVP_PKEY *pkey=NULL;
3307 int i;
3308
3309 if (s->state == SSL3_ST_CW_CERT_A)
3310 {
3311 /* Let cert callback update client certificates if required */
3312 if (s->cert->cert_cb)
3313 {
3314 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3315 if (i < 0)
3316 {
3317 s->rwstate=SSL_X509_LOOKUP;
3318 return -1;
3319 }
3320 if (i == 0)
3321 {
3322 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3323 return 0;
3324 }
3325 s->rwstate=SSL_NOTHING;
3326 }
3327 if (ssl3_check_client_certificate(s))
3328 s->state=SSL3_ST_CW_CERT_C;
3329 else
3330 s->state=SSL3_ST_CW_CERT_B;
3331 }
3332
3333 /* We need to get a client cert */
3334 if (s->state == SSL3_ST_CW_CERT_B)
3335 {
3336 /* If we get an error, we need to
3337 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3338 * We then get retied later */
3339 i=0;
3340 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3341 if (i < 0)
3342 {
3343 s->rwstate=SSL_X509_LOOKUP;
3344 return(-1);
3345 }
3346 s->rwstate=SSL_NOTHING;
3347 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3348 {
3349 s->state=SSL3_ST_CW_CERT_B;
3350 if ( !SSL_use_certificate(s,x509) ||
3351 !SSL_use_PrivateKey(s,pkey))
3352 i=0;
3353 }
3354 else if (i == 1)
3355 {
3356 i=0;
3357 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3358 }
3359
3360 if (x509 != NULL) X509_free(x509);
3361 if (pkey != NULL) EVP_PKEY_free(pkey);
3362 if (i && !ssl3_check_client_certificate(s))
3363 i = 0;
3364 if (i == 0)
3365 {
3366 if (s->version == SSL3_VERSION)
3367 {
3368 s->s3->tmp.cert_req=0;
3369 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3370 return(1);
3371 }
3372 else
3373 {
3374 s->s3->tmp.cert_req=2;
3375 }
3376 }
3377
3378 /* Ok, we have a cert */
3379 s->state=SSL3_ST_CW_CERT_C;
3380 }
3381
3382 if (s->state == SSL3_ST_CW_CERT_C)
3383 {
3384 s->state=SSL3_ST_CW_CERT_D;
3385 ssl3_output_cert_chain(s,
3386 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3387 }
3388 /* SSL3_ST_CW_CERT_D */
3389 return ssl_do_write(s);
3390 }
3391
3392 #define has_bits(i,m) (((i)&(m)) == (m))
3393
3394 int ssl3_check_cert_and_algorithm(SSL *s)
3395 {
3396 int i,idx;
3397 long alg_k,alg_a;
3398 EVP_PKEY *pkey=NULL;
3399 SESS_CERT *sc;
3400 #ifndef OPENSSL_NO_RSA
3401 RSA *rsa;
3402 #endif
3403 #ifndef OPENSSL_NO_DH
3404 DH *dh;
3405 #endif
3406
3407 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3408 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3409
3410 /* we don't have a certificate */
3411 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3412 return(1);
3413
3414 sc=s->session->sess_cert;
3415 if (sc == NULL)
3416 {
3417 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3418 goto err;
3419 }
3420
3421 #ifndef OPENSSL_NO_RSA
3422 rsa=s->session->sess_cert->peer_rsa_tmp;
3423 #endif
3424 #ifndef OPENSSL_NO_DH
3425 dh=s->session->sess_cert->peer_dh_tmp;
3426 #endif
3427
3428 /* This is the passed certificate */
3429
3430 idx=sc->peer_cert_type;
3431 #ifndef OPENSSL_NO_ECDH
3432 if (idx == SSL_PKEY_ECC)
3433 {
3434 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3435 s) == 0)
3436 { /* check failed */
3437 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3438 goto f_err;
3439 }
3440 else
3441 {
3442 return 1;
3443 }
3444 }
3445 else if (alg_a & SSL_aECDSA)
3446 {
3447 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3448 goto f_err;
3449 }
3450 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3451 {
3452 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3453 goto f_err;
3454 }
3455 #endif
3456 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3457 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3458 EVP_PKEY_free(pkey);
3459
3460
3461 /* Check that we have a certificate if we require one */
3462 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3463 {
3464 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3465 goto f_err;
3466 }
3467 #ifndef OPENSSL_NO_DSA
3468 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3469 {
3470 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3471 goto f_err;
3472 }
3473 #endif
3474 #ifndef OPENSSL_NO_RSA
3475 if ((alg_k & SSL_kRSA) &&
3476 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3477 {
3478 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3479 goto f_err;
3480 }
3481 #endif
3482 #ifndef OPENSSL_NO_DH
3483 if ((alg_k & SSL_kDHE) &&
3484 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3485 {
3486 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3487 goto f_err;
3488 }
3489 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3490 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3491 {
3492 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3493 goto f_err;
3494 }
3495 #ifndef OPENSSL_NO_DSA
3496 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3497 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3498 {
3499 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3500 goto f_err;
3501 }
3502 #endif
3503 #endif
3504
3505 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3506 {
3507 #ifndef OPENSSL_NO_RSA
3508 if (alg_k & SSL_kRSA)
3509 {
3510 if (rsa == NULL
3511 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3512 {
3513 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3514 goto f_err;
3515 }
3516 }
3517 else
3518 #endif
3519 #ifndef OPENSSL_NO_DH
3520 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3521 {
3522 if (dh == NULL
3523 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3524 {
3525 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3526 goto f_err;
3527 }
3528 }
3529 else
3530 #endif
3531 {
3532 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3533 goto f_err;
3534 }
3535 }
3536 return(1);
3537 f_err:
3538 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3539 err:
3540 return(0);
3541 }
3542
3543 /* Check to see if handshake is full or resumed. Usually this is just a
3544 * case of checking to see if a cache hit has occurred. In the case of
3545 * session tickets we have to check the next message to be sure.
3546 */
3547
3548 #ifndef OPENSSL_NO_TLSEXT
3549 # ifndef OPENSSL_NO_NEXTPROTONEG
3550 int ssl3_send_next_proto(SSL *s)
3551 {
3552 unsigned int len, padding_len;
3553 unsigned char *d;
3554
3555 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3556 {
3557 len = s->next_proto_negotiated_len;
3558 padding_len = 32 - ((len + 2) % 32);
3559 d = (unsigned char *)s->init_buf->data;
3560 d[4] = len;
3561 memcpy(d + 5, s->next_proto_negotiated, len);
3562 d[5 + len] = padding_len;
3563 memset(d + 6 + len, 0, padding_len);
3564 *(d++)=SSL3_MT_NEXT_PROTO;
3565 l2n3(2 + len + padding_len, d);
3566 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3567 s->init_num = 4 + 2 + len + padding_len;
3568 s->init_off = 0;
3569 }
3570
3571 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3572 }
3573 # endif
3574
3575 int ssl3_check_finished(SSL *s)
3576 {
3577 int ok;
3578 long n;
3579
3580 /* Read the message to see if it is supplemental data,
3581 * regardless if there is a session ticket this function is
3582 * called when we really expect a Certificate message, so
3583 * permit appropriate message length */
3584 n=s->method->ssl_get_message(s,
3585 SSL3_ST_CR_CERT_A,
3586 SSL3_ST_CR_CERT_B,
3587 -1,
3588 s->max_cert_list,
3589 &ok);
3590 if (!ok) return((int)n);
3591 s->s3->tmp.reuse_message = 1;
3592
3593 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3594 return 3;
3595 /* If we have no ticket it cannot be a resumed session. */
3596 if (!s->session->tlsext_tick)
3597 return 1;
3598 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3599 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3600 return 2;
3601
3602 return 1;
3603 }
3604 #endif
3605
3606 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3607 {
3608 int i = 0;
3609 #ifndef OPENSSL_NO_ENGINE
3610 if (s->ctx->client_cert_engine)
3611 {
3612 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3613 SSL_get_client_CA_list(s),
3614 px509, ppkey, NULL, NULL, NULL);
3615 if (i != 0)
3616 return i;
3617 }
3618 #endif
3619 if (s->ctx->client_cert_cb)
3620 i = s->ctx->client_cert_cb(s,px509,ppkey);
3621 return i;
3622 }
3623
3624 #ifndef OPENSSL_NO_TLSEXT
3625 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3626 {
3627 int al = 0;
3628 if (s->ctx->cli_supp_data_records_count)
3629 {
3630 unsigned char *p = NULL;
3631 unsigned char *size_loc = NULL;
3632 cli_supp_data_record *record = NULL;
3633 size_t length = 0;
3634 size_t i = 0;
3635
3636 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3637 {
3638 const unsigned char *out = NULL;
3639 unsigned short outlen = 0;
3640 int cb_retval = 0;
3641 record = &s->ctx->cli_supp_data_records[i];
3642
3643 /* NULL callback or -1 omits supp data entry*/
3644 if (!record->fn2)
3645 continue;
3646 cb_retval = record->fn2(s, record->supp_data_type,
3647 &out, &outlen, &al,
3648 record->arg);
3649 if (cb_retval == -1)
3650 continue; /* skip this supp data entry */
3651 if (cb_retval == 0)
3652 {
3653 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3654 goto f_err;
3655 }
3656 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3657 {
3658 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3659 return 0;
3660 }
3661 /* if first entry, write handshake message type */
3662 if (length == 0)
3663 {
3664 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3665 {
3666 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3667 return 0;
3668 }
3669 p = (unsigned char *)s->init_buf->data;
3670 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3671 /* update message length when all
3672 * callbacks complete */
3673 size_loc = p;
3674 /* skip over handshake length field (3
3675 * bytes) and supp_data length field
3676 * (3 bytes) */
3677 p += 3 + 3;
3678 length += 1 +3 +3;
3679 }
3680 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3681 {
3682 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3683 return 0;
3684 }
3685 s2n(record->supp_data_type, p);
3686 s2n(outlen, p);
3687 memcpy(p, out, outlen);
3688 length += (outlen + 4);
3689 p += outlen;
3690 }
3691 if (length > 0)
3692 {
3693 /* write handshake length */
3694 l2n3(length - 4, size_loc);
3695 /* supp_data length */
3696 l2n3(length - 7, size_loc);
3697 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3698 s->init_num = length;
3699 s->init_off = 0;
3700 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3701 }
3702 }
3703
3704 /* no supp data message sent */
3705 *skip = 1;
3706 s->init_num = 0;
3707 s->init_off = 0;
3708 return 1;
3709
3710 f_err:
3711 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3712 return 0;
3713 }
3714
3715 int tls1_get_server_supplemental_data(SSL *s)
3716 {
3717 int al = 0;
3718 int ok;
3719 long n;
3720 const unsigned char *p, *d;
3721 unsigned short supp_data_entry_type = 0;
3722 unsigned short supp_data_entry_len = 0;
3723 unsigned long supp_data_len = 0;
3724 size_t i;
3725 int cb_retval = 0;
3726
3727 n=s->method->ssl_get_message(s,
3728 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3729 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3730 SSL3_MT_SUPPLEMENTAL_DATA,
3731 /* use default limit */
3732 TLSEXT_MAXLEN_supplemental_data,
3733 &ok);
3734
3735 if (!ok) return((int)n);
3736
3737 p = (unsigned char *)s->init_msg;
3738 d = p;
3739 /* The message cannot be empty */
3740 if (n < 3)
3741 {
3742 al = SSL_AD_DECODE_ERROR;
3743 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3744 goto f_err;
3745 }
3746 n2l3(p, supp_data_len);
3747 while (p < d+supp_data_len)
3748 {
3749 n2s(p, supp_data_entry_type);
3750 n2s(p, supp_data_entry_len);
3751 /* if there is a callback for this supp data type, send it */
3752 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3753 {
3754 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3755 s->ctx->cli_supp_data_records[i].fn1)
3756 {
3757 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3758 supp_data_entry_len, &al,
3759 s->ctx->cli_supp_data_records[i].arg);
3760 if (cb_retval == 0)
3761 {
3762 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3763 goto f_err;
3764 }
3765 }
3766 }
3767 p += supp_data_entry_len;
3768 }
3769 return 1;
3770 f_err:
3771 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3772 return -1;
3773 }
3774 #endif
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