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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 (ssl_cipher_disabled(s, c))
1083 {
1084 al=SSL_AD_ILLEGAL_PARAMETER;
1085 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1086 goto f_err;
1087 }
1088 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1089
1090 sk=ssl_get_ciphers_by_id(s);
1091 i=sk_SSL_CIPHER_find(sk,c);
1092 if (i < 0)
1093 {
1094 /* we did not say we would use this cipher */
1095 al=SSL_AD_ILLEGAL_PARAMETER;
1096 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1097 goto f_err;
1098 }
1099
1100 /* Depending on the session caching (internal/external), the cipher
1101 and/or cipher_id values may not be set. Make sure that
1102 cipher_id is set and use it for comparison. */
1103 if (s->session->cipher)
1104 s->session->cipher_id = s->session->cipher->id;
1105 if (s->hit && (s->session->cipher_id != c->id))
1106 {
1107 /* Workaround is now obsolete */
1108 #if 0
1109 if (!(s->options &
1110 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1111 #endif
1112 {
1113 al=SSL_AD_ILLEGAL_PARAMETER;
1114 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1115 goto f_err;
1116 }
1117 }
1118 s->s3->tmp.new_cipher=c;
1119 /* Don't digest cached records if no sigalgs: we may need them for
1120 * client authentication.
1121 */
1122 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1123 goto f_err;
1124 /* lets get the compression algorithm */
1125 /* COMPRESSION */
1126 #ifdef OPENSSL_NO_COMP
1127 if (*(p++) != 0)
1128 {
1129 al=SSL_AD_ILLEGAL_PARAMETER;
1130 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1131 goto f_err;
1132 }
1133 /* If compression is disabled we'd better not try to resume a session
1134 * using compression.
1135 */
1136 if (s->session->compress_meth != 0)
1137 {
1138 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1139 goto f_err;
1140 }
1141 #else
1142 j= *(p++);
1143 if (s->hit && j != s->session->compress_meth)
1144 {
1145 al=SSL_AD_ILLEGAL_PARAMETER;
1146 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1147 goto f_err;
1148 }
1149 if (j == 0)
1150 comp=NULL;
1151 else if (s->options & SSL_OP_NO_COMPRESSION)
1152 {
1153 al=SSL_AD_ILLEGAL_PARAMETER;
1154 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1155 goto f_err;
1156 }
1157 else
1158 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1159
1160 if ((j != 0) && (comp == NULL))
1161 {
1162 al=SSL_AD_ILLEGAL_PARAMETER;
1163 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1164 goto f_err;
1165 }
1166 else
1167 {
1168 s->s3->tmp.new_compression=comp;
1169 }
1170 #endif
1171
1172 #ifndef OPENSSL_NO_TLSEXT
1173 /* TLS extensions*/
1174 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1175 {
1176 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1177 goto err;
1178 }
1179 #endif
1180
1181 if (p != (d+n))
1182 {
1183 /* wrong packet length */
1184 al=SSL_AD_DECODE_ERROR;
1185 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1186 goto f_err;
1187 }
1188
1189 return(1);
1190 f_err:
1191 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1192 err:
1193 return(-1);
1194 }
1195
1196 int ssl3_get_server_certificate(SSL *s)
1197 {
1198 int al,i,ok,ret= -1;
1199 unsigned long n,nc,llen,l;
1200 X509 *x=NULL;
1201 const unsigned char *q,*p;
1202 unsigned char *d;
1203 STACK_OF(X509) *sk=NULL;
1204 SESS_CERT *sc;
1205 EVP_PKEY *pkey=NULL;
1206 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1207
1208 n=s->method->ssl_get_message(s,
1209 SSL3_ST_CR_CERT_A,
1210 SSL3_ST_CR_CERT_B,
1211 -1,
1212 s->max_cert_list,
1213 &ok);
1214
1215 if (!ok) return((int)n);
1216
1217 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1218 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1219 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1220 {
1221 s->s3->tmp.reuse_message=1;
1222 return(1);
1223 }
1224
1225 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1226 {
1227 al=SSL_AD_UNEXPECTED_MESSAGE;
1228 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1229 goto f_err;
1230 }
1231 p=d=(unsigned char *)s->init_msg;
1232
1233 if ((sk=sk_X509_new_null()) == NULL)
1234 {
1235 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1236 goto err;
1237 }
1238
1239 n2l3(p,llen);
1240 if (llen+3 != n)
1241 {
1242 al=SSL_AD_DECODE_ERROR;
1243 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1244 goto f_err;
1245 }
1246 for (nc=0; nc<llen; )
1247 {
1248 n2l3(p,l);
1249 if ((l+nc+3) > llen)
1250 {
1251 al=SSL_AD_DECODE_ERROR;
1252 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1253 goto f_err;
1254 }
1255
1256 q=p;
1257 x=d2i_X509(NULL,&q,l);
1258 if (x == NULL)
1259 {
1260 al=SSL_AD_BAD_CERTIFICATE;
1261 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1262 goto f_err;
1263 }
1264 if (q != (p+l))
1265 {
1266 al=SSL_AD_DECODE_ERROR;
1267 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1268 goto f_err;
1269 }
1270 if (!sk_X509_push(sk,x))
1271 {
1272 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1273 goto err;
1274 }
1275 x=NULL;
1276 nc+=l+3;
1277 p=q;
1278 }
1279
1280 i=ssl_verify_cert_chain(s,sk);
1281 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1282 #ifndef OPENSSL_NO_KRB5
1283 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1284 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1285 #endif /* OPENSSL_NO_KRB5 */
1286 )
1287 {
1288 al=ssl_verify_alarm_type(s->verify_result);
1289 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1290 goto f_err;
1291 }
1292 ERR_clear_error(); /* but we keep s->verify_result */
1293
1294 sc=ssl_sess_cert_new();
1295 if (sc == NULL) goto err;
1296
1297 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1298 s->session->sess_cert=sc;
1299
1300 sc->cert_chain=sk;
1301 /* Inconsistency alert: cert_chain does include the peer's
1302 * certificate, which we don't include in s3_srvr.c */
1303 x=sk_X509_value(sk,0);
1304 sk=NULL;
1305 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1306
1307 pkey=X509_get_pubkey(x);
1308
1309 /* VRS: allow null cert if auth == KRB5 */
1310 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1311 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1312 ? 0 : 1;
1313
1314 #ifdef KSSL_DEBUG
1315 printf("pkey,x = %p, %p\n", pkey,x);
1316 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1317 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1318 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1319 #endif /* KSSL_DEBUG */
1320
1321 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1322 {
1323 x=NULL;
1324 al=SSL3_AL_FATAL;
1325 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1326 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1327 goto f_err;
1328 }
1329
1330 i=ssl_cert_type(x,pkey);
1331 if (need_cert && i < 0)
1332 {
1333 x=NULL;
1334 al=SSL3_AL_FATAL;
1335 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1336 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1337 goto f_err;
1338 }
1339
1340 if (need_cert)
1341 {
1342 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1343 if (exp_idx >= 0 && i != exp_idx)
1344 {
1345 x=NULL;
1346 al=SSL_AD_ILLEGAL_PARAMETER;
1347 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1348 SSL_R_WRONG_CERTIFICATE_TYPE);
1349 goto f_err;
1350 }
1351 sc->peer_cert_type=i;
1352 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1353 /* Why would the following ever happen?
1354 * We just created sc a couple of lines ago. */
1355 if (sc->peer_pkeys[i].x509 != NULL)
1356 X509_free(sc->peer_pkeys[i].x509);
1357 sc->peer_pkeys[i].x509=x;
1358 sc->peer_key= &(sc->peer_pkeys[i]);
1359
1360 if (s->session->peer != NULL)
1361 X509_free(s->session->peer);
1362 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1363 s->session->peer=x;
1364 }
1365 else
1366 {
1367 sc->peer_cert_type=i;
1368 sc->peer_key= NULL;
1369
1370 if (s->session->peer != NULL)
1371 X509_free(s->session->peer);
1372 s->session->peer=NULL;
1373 }
1374 s->session->verify_result = s->verify_result;
1375
1376 x=NULL;
1377 ret=1;
1378 if (0)
1379 {
1380 f_err:
1381 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1382 }
1383 err:
1384 EVP_PKEY_free(pkey);
1385 X509_free(x);
1386 sk_X509_pop_free(sk,X509_free);
1387 return(ret);
1388 }
1389
1390 int ssl3_get_key_exchange(SSL *s)
1391 {
1392 #ifndef OPENSSL_NO_RSA
1393 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1394 #endif
1395 EVP_MD_CTX md_ctx;
1396 unsigned char *param,*p;
1397 int al,i,j,param_len,ok;
1398 long n,alg_k,alg_a;
1399 EVP_PKEY *pkey=NULL;
1400 const EVP_MD *md = NULL;
1401 #ifndef OPENSSL_NO_RSA
1402 RSA *rsa=NULL;
1403 #endif
1404 #ifndef OPENSSL_NO_DH
1405 DH *dh=NULL;
1406 #endif
1407 #ifndef OPENSSL_NO_ECDH
1408 EC_KEY *ecdh = NULL;
1409 BN_CTX *bn_ctx = NULL;
1410 EC_POINT *srvr_ecpoint = NULL;
1411 int curve_nid = 0;
1412 int encoded_pt_len = 0;
1413 #endif
1414
1415 /* use same message size as in ssl3_get_certificate_request()
1416 * as ServerKeyExchange message may be skipped */
1417 n=s->method->ssl_get_message(s,
1418 SSL3_ST_CR_KEY_EXCH_A,
1419 SSL3_ST_CR_KEY_EXCH_B,
1420 -1,
1421 s->max_cert_list,
1422 &ok);
1423 if (!ok) return((int)n);
1424
1425 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1426 {
1427 #ifndef OPENSSL_NO_PSK
1428 /* In plain PSK ciphersuite, ServerKeyExchange can be
1429 omitted if no identity hint is sent. Set
1430 session->sess_cert anyway to avoid problems
1431 later.*/
1432 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1433 {
1434 s->session->sess_cert=ssl_sess_cert_new();
1435 if (s->ctx->psk_identity_hint)
1436 OPENSSL_free(s->ctx->psk_identity_hint);
1437 s->ctx->psk_identity_hint = NULL;
1438 }
1439 #endif
1440 s->s3->tmp.reuse_message=1;
1441 return(1);
1442 }
1443
1444 param=p=(unsigned char *)s->init_msg;
1445 if (s->session->sess_cert != NULL)
1446 {
1447 #ifndef OPENSSL_NO_RSA
1448 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1449 {
1450 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1451 s->session->sess_cert->peer_rsa_tmp=NULL;
1452 }
1453 #endif
1454 #ifndef OPENSSL_NO_DH
1455 if (s->session->sess_cert->peer_dh_tmp)
1456 {
1457 DH_free(s->session->sess_cert->peer_dh_tmp);
1458 s->session->sess_cert->peer_dh_tmp=NULL;
1459 }
1460 #endif
1461 #ifndef OPENSSL_NO_ECDH
1462 if (s->session->sess_cert->peer_ecdh_tmp)
1463 {
1464 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1465 s->session->sess_cert->peer_ecdh_tmp=NULL;
1466 }
1467 #endif
1468 }
1469 else
1470 {
1471 s->session->sess_cert=ssl_sess_cert_new();
1472 }
1473
1474 param_len=0;
1475 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1476 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1477 EVP_MD_CTX_init(&md_ctx);
1478
1479 #ifndef OPENSSL_NO_PSK
1480 if (alg_k & SSL_kPSK)
1481 {
1482 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1483
1484 al=SSL_AD_HANDSHAKE_FAILURE;
1485 n2s(p,i);
1486 param_len=i+2;
1487 /* Store PSK identity hint for later use, hint is used
1488 * in ssl3_send_client_key_exchange. Assume that the
1489 * maximum length of a PSK identity hint can be as
1490 * long as the maximum length of a PSK identity. */
1491 if (i > PSK_MAX_IDENTITY_LEN)
1492 {
1493 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1494 SSL_R_DATA_LENGTH_TOO_LONG);
1495 goto f_err;
1496 }
1497 if (param_len > n)
1498 {
1499 al=SSL_AD_DECODE_ERROR;
1500 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1501 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1502 goto f_err;
1503 }
1504 /* If received PSK identity hint contains NULL
1505 * characters, the hint is truncated from the first
1506 * NULL. p may not be ending with NULL, so create a
1507 * NULL-terminated string. */
1508 memcpy(tmp_id_hint, p, i);
1509 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1510 if (s->ctx->psk_identity_hint != NULL)
1511 OPENSSL_free(s->ctx->psk_identity_hint);
1512 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1513 if (s->ctx->psk_identity_hint == NULL)
1514 {
1515 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1516 goto f_err;
1517 }
1518
1519 p+=i;
1520 n-=param_len;
1521 }
1522 else
1523 #endif /* !OPENSSL_NO_PSK */
1524 #ifndef OPENSSL_NO_SRP
1525 if (alg_k & SSL_kSRP)
1526 {
1527 n2s(p,i);
1528 param_len=i+2;
1529 if (param_len > n)
1530 {
1531 al=SSL_AD_DECODE_ERROR;
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1533 goto f_err;
1534 }
1535 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1536 {
1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1538 goto err;
1539 }
1540 p+=i;
1541
1542 n2s(p,i);
1543 param_len+=i+2;
1544 if (param_len > n)
1545 {
1546 al=SSL_AD_DECODE_ERROR;
1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1548 goto f_err;
1549 }
1550 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1551 {
1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1553 goto err;
1554 }
1555 p+=i;
1556
1557 i = (unsigned int)(p[0]);
1558 p++;
1559 param_len+=i+1;
1560 if (param_len > n)
1561 {
1562 al=SSL_AD_DECODE_ERROR;
1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1564 goto f_err;
1565 }
1566 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1567 {
1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1569 goto err;
1570 }
1571 p+=i;
1572
1573 n2s(p,i);
1574 param_len+=i+2;
1575 if (param_len > n)
1576 {
1577 al=SSL_AD_DECODE_ERROR;
1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1579 goto f_err;
1580 }
1581 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1582 {
1583 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1584 goto err;
1585 }
1586 p+=i;
1587 n-=param_len;
1588
1589 /* We must check if there is a certificate */
1590 #ifndef OPENSSL_NO_RSA
1591 if (alg_a & SSL_aRSA)
1592 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1593 #else
1594 if (0)
1595 ;
1596 #endif
1597 #ifndef OPENSSL_NO_DSA
1598 else if (alg_a & SSL_aDSS)
1599 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1600 #endif
1601 }
1602 else
1603 #endif /* !OPENSSL_NO_SRP */
1604 #ifndef OPENSSL_NO_RSA
1605 if (alg_k & SSL_kRSA)
1606 {
1607 if ((rsa=RSA_new()) == NULL)
1608 {
1609 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1610 goto err;
1611 }
1612 n2s(p,i);
1613 param_len=i+2;
1614 if (param_len > n)
1615 {
1616 al=SSL_AD_DECODE_ERROR;
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1618 goto f_err;
1619 }
1620 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1621 {
1622 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1623 goto err;
1624 }
1625 p+=i;
1626
1627 n2s(p,i);
1628 param_len+=i+2;
1629 if (param_len > n)
1630 {
1631 al=SSL_AD_DECODE_ERROR;
1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1633 goto f_err;
1634 }
1635 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1636 {
1637 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1638 goto err;
1639 }
1640 p+=i;
1641 n-=param_len;
1642
1643 /* this should be because we are using an export cipher */
1644 if (alg_a & SSL_aRSA)
1645 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1646 else
1647 {
1648 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1649 goto err;
1650 }
1651 s->session->sess_cert->peer_rsa_tmp=rsa;
1652 rsa=NULL;
1653 }
1654 #else /* OPENSSL_NO_RSA */
1655 if (0)
1656 ;
1657 #endif
1658 #ifndef OPENSSL_NO_DH
1659 else if (alg_k & SSL_kDHE)
1660 {
1661 if ((dh=DH_new()) == NULL)
1662 {
1663 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1664 goto err;
1665 }
1666 n2s(p,i);
1667 param_len=i+2;
1668 if (param_len > n)
1669 {
1670 al=SSL_AD_DECODE_ERROR;
1671 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1672 goto f_err;
1673 }
1674 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1675 {
1676 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1677 goto err;
1678 }
1679 p+=i;
1680
1681 n2s(p,i);
1682 param_len+=i+2;
1683 if (param_len > n)
1684 {
1685 al=SSL_AD_DECODE_ERROR;
1686 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1687 goto f_err;
1688 }
1689 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1690 {
1691 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1692 goto err;
1693 }
1694 p+=i;
1695
1696 n2s(p,i);
1697 param_len+=i+2;
1698 if (param_len > n)
1699 {
1700 al=SSL_AD_DECODE_ERROR;
1701 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1702 goto f_err;
1703 }
1704 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1705 {
1706 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1707 goto err;
1708 }
1709 p+=i;
1710 n-=param_len;
1711
1712 #ifndef OPENSSL_NO_RSA
1713 if (alg_a & SSL_aRSA)
1714 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1715 #else
1716 if (0)
1717 ;
1718 #endif
1719 #ifndef OPENSSL_NO_DSA
1720 else if (alg_a & SSL_aDSS)
1721 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1722 #endif
1723 /* else anonymous DH, so no certificate or pkey. */
1724
1725 s->session->sess_cert->peer_dh_tmp=dh;
1726 dh=NULL;
1727 }
1728 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1729 {
1730 al=SSL_AD_ILLEGAL_PARAMETER;
1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1732 goto f_err;
1733 }
1734 #endif /* !OPENSSL_NO_DH */
1735
1736 #ifndef OPENSSL_NO_ECDH
1737 else if (alg_k & SSL_kECDHE)
1738 {
1739 EC_GROUP *ngroup;
1740 const EC_GROUP *group;
1741
1742 if ((ecdh=EC_KEY_new()) == NULL)
1743 {
1744 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1745 goto err;
1746 }
1747
1748 /* Extract elliptic curve parameters and the
1749 * server's ephemeral ECDH public key.
1750 * Keep accumulating lengths of various components in
1751 * param_len and make sure it never exceeds n.
1752 */
1753
1754 /* XXX: For now we only support named (not generic) curves
1755 * and the ECParameters in this case is just three bytes.
1756 */
1757 param_len=3;
1758 /* Check curve is one of our preferences, if not server has
1759 * sent an invalid curve.
1760 */
1761 if (!tls1_check_curve(s, p, param_len))
1762 {
1763 al=SSL_AD_DECODE_ERROR;
1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1765 goto f_err;
1766 }
1767
1768 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1769 {
1770 al=SSL_AD_INTERNAL_ERROR;
1771 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1772 goto f_err;
1773 }
1774
1775 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1776 if (ngroup == NULL)
1777 {
1778 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1779 goto err;
1780 }
1781 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1782 {
1783 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1784 goto err;
1785 }
1786 EC_GROUP_free(ngroup);
1787
1788 group = EC_KEY_get0_group(ecdh);
1789
1790 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1791 (EC_GROUP_get_degree(group) > 163))
1792 {
1793 al=SSL_AD_EXPORT_RESTRICTION;
1794 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1795 goto f_err;
1796 }
1797
1798 p+=3;
1799
1800 /* Next, get the encoded ECPoint */
1801 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1802 ((bn_ctx = BN_CTX_new()) == NULL))
1803 {
1804 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1805 goto err;
1806 }
1807
1808 encoded_pt_len = *p; /* length of encoded point */
1809 p+=1;
1810 param_len += (1 + encoded_pt_len);
1811 if ((param_len > n) ||
1812 (EC_POINT_oct2point(group, srvr_ecpoint,
1813 p, encoded_pt_len, bn_ctx) == 0))
1814 {
1815 al=SSL_AD_DECODE_ERROR;
1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1817 goto f_err;
1818 }
1819
1820 n-=param_len;
1821 p+=encoded_pt_len;
1822
1823 /* The ECC/TLS specification does not mention
1824 * the use of DSA to sign ECParameters in the server
1825 * key exchange message. We do support RSA and ECDSA.
1826 */
1827 if (0) ;
1828 #ifndef OPENSSL_NO_RSA
1829 else if (alg_a & SSL_aRSA)
1830 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1831 #endif
1832 #ifndef OPENSSL_NO_ECDSA
1833 else if (alg_a & SSL_aECDSA)
1834 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1835 #endif
1836 /* else anonymous ECDH, so no certificate or pkey. */
1837 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1838 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1839 ecdh=NULL;
1840 BN_CTX_free(bn_ctx);
1841 bn_ctx = NULL;
1842 EC_POINT_free(srvr_ecpoint);
1843 srvr_ecpoint = NULL;
1844 }
1845 else if (alg_k)
1846 {
1847 al=SSL_AD_UNEXPECTED_MESSAGE;
1848 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1849 goto f_err;
1850 }
1851 #endif /* !OPENSSL_NO_ECDH */
1852
1853
1854 /* p points to the next byte, there are 'n' bytes left */
1855
1856 /* if it was signed, check the signature */
1857 if (pkey != NULL)
1858 {
1859 if (SSL_USE_SIGALGS(s))
1860 {
1861 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1862 if (rv == -1)
1863 goto err;
1864 else if (rv == 0)
1865 {
1866 al = SSL_AD_DECODE_ERROR;
1867 goto f_err;
1868 }
1869 #ifdef SSL_DEBUG
1870 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1871 #endif
1872 p += 2;
1873 n -= 2;
1874 }
1875 else
1876 md = EVP_sha1();
1877
1878 n2s(p,i);
1879 n-=2;
1880 j=EVP_PKEY_size(pkey);
1881
1882 if ((i != n) || (n > j) || (n <= 0))
1883 {
1884 /* wrong packet length */
1885 al=SSL_AD_DECODE_ERROR;
1886 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1887 goto f_err;
1888 }
1889
1890 #ifndef OPENSSL_NO_RSA
1891 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1892 {
1893 int num;
1894
1895 j=0;
1896 q=md_buf;
1897 for (num=2; num > 0; num--)
1898 {
1899 EVP_MD_CTX_set_flags(&md_ctx,
1900 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1901 EVP_DigestInit_ex(&md_ctx,(num == 2)
1902 ?s->ctx->md5:s->ctx->sha1, NULL);
1903 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1904 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1905 EVP_DigestUpdate(&md_ctx,param,param_len);
1906 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1907 q+=i;
1908 j+=i;
1909 }
1910 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1911 pkey->pkey.rsa);
1912 if (i < 0)
1913 {
1914 al=SSL_AD_DECRYPT_ERROR;
1915 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1916 goto f_err;
1917 }
1918 if (i == 0)
1919 {
1920 /* bad signature */
1921 al=SSL_AD_DECRYPT_ERROR;
1922 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1923 goto f_err;
1924 }
1925 }
1926 else
1927 #endif
1928 {
1929 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1930 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1931 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1932 EVP_VerifyUpdate(&md_ctx,param,param_len);
1933 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1934 {
1935 /* bad signature */
1936 al=SSL_AD_DECRYPT_ERROR;
1937 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1938 goto f_err;
1939 }
1940 }
1941 }
1942 else
1943 {
1944 /* aNULL or kPSK do not need public keys */
1945 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1946 {
1947 /* Might be wrong key type, check it */
1948 if (ssl3_check_cert_and_algorithm(s))
1949 /* Otherwise this shouldn't happen */
1950 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1951 goto err;
1952 }
1953 /* still data left over */
1954 if (n != 0)
1955 {
1956 al=SSL_AD_DECODE_ERROR;
1957 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1958 goto f_err;
1959 }
1960 }
1961 EVP_PKEY_free(pkey);
1962 EVP_MD_CTX_cleanup(&md_ctx);
1963 return(1);
1964 f_err:
1965 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1966 err:
1967 EVP_PKEY_free(pkey);
1968 #ifndef OPENSSL_NO_RSA
1969 if (rsa != NULL)
1970 RSA_free(rsa);
1971 #endif
1972 #ifndef OPENSSL_NO_DH
1973 if (dh != NULL)
1974 DH_free(dh);
1975 #endif
1976 #ifndef OPENSSL_NO_ECDH
1977 BN_CTX_free(bn_ctx);
1978 EC_POINT_free(srvr_ecpoint);
1979 if (ecdh != NULL)
1980 EC_KEY_free(ecdh);
1981 #endif
1982 EVP_MD_CTX_cleanup(&md_ctx);
1983 return(-1);
1984 }
1985
1986 int ssl3_get_certificate_request(SSL *s)
1987 {
1988 int ok,ret=0;
1989 unsigned long n,nc,l;
1990 unsigned int llen, ctype_num,i;
1991 X509_NAME *xn=NULL;
1992 const unsigned char *p,*q;
1993 unsigned char *d;
1994 STACK_OF(X509_NAME) *ca_sk=NULL;
1995
1996 n=s->method->ssl_get_message(s,
1997 SSL3_ST_CR_CERT_REQ_A,
1998 SSL3_ST_CR_CERT_REQ_B,
1999 -1,
2000 s->max_cert_list,
2001 &ok);
2002
2003 if (!ok) return((int)n);
2004
2005 s->s3->tmp.cert_req=0;
2006
2007 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2008 {
2009 s->s3->tmp.reuse_message=1;
2010 /* If we get here we don't need any cached handshake records
2011 * as we wont be doing client auth.
2012 */
2013 if (s->s3->handshake_buffer)
2014 {
2015 if (!ssl3_digest_cached_records(s))
2016 goto err;
2017 }
2018 return(1);
2019 }
2020
2021 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2022 {
2023 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2024 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2025 goto err;
2026 }
2027
2028 /* TLS does not like anon-DH with client cert */
2029 if (s->version > SSL3_VERSION)
2030 {
2031 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2032 {
2033 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2034 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2035 goto err;
2036 }
2037 }
2038
2039 p=d=(unsigned char *)s->init_msg;
2040
2041 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2042 {
2043 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2044 goto err;
2045 }
2046
2047 /* get the certificate types */
2048 ctype_num= *(p++);
2049 if (s->cert->ctypes)
2050 {
2051 OPENSSL_free(s->cert->ctypes);
2052 s->cert->ctypes = NULL;
2053 }
2054 if (ctype_num > SSL3_CT_NUMBER)
2055 {
2056 /* If we exceed static buffer copy all to cert structure */
2057 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2058 memcpy(s->cert->ctypes, p, ctype_num);
2059 s->cert->ctype_num = (size_t)ctype_num;
2060 ctype_num=SSL3_CT_NUMBER;
2061 }
2062 for (i=0; i<ctype_num; i++)
2063 s->s3->tmp.ctype[i]= p[i];
2064 p+=p[-1];
2065 if (SSL_USE_SIGALGS(s))
2066 {
2067 n2s(p, llen);
2068 /* Check we have enough room for signature algorithms and
2069 * following length value.
2070 */
2071 if ((unsigned long)(p - d + llen + 2) > n)
2072 {
2073 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2074 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2075 goto err;
2076 }
2077 /* Clear certificate digests and validity flags */
2078 for (i = 0; i < SSL_PKEY_NUM; i++)
2079 {
2080 s->cert->pkeys[i].digest = NULL;
2081 s->cert->pkeys[i].valid_flags = 0;
2082 }
2083 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2084 {
2085 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2086 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2087 goto err;
2088 }
2089 p += llen;
2090 }
2091
2092 /* get the CA RDNs */
2093 n2s(p,llen);
2094 #if 0
2095 {
2096 FILE *out;
2097 out=fopen("/tmp/vsign.der","w");
2098 fwrite(p,1,llen,out);
2099 fclose(out);
2100 }
2101 #endif
2102
2103 if ((unsigned long)(p - d + llen) != n)
2104 {
2105 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2106 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2107 goto err;
2108 }
2109
2110 for (nc=0; nc<llen; )
2111 {
2112 n2s(p,l);
2113 if ((l+nc+2) > llen)
2114 {
2115 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2116 goto cont; /* netscape bugs */
2117 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2118 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2119 goto err;
2120 }
2121
2122 q=p;
2123
2124 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2125 {
2126 /* If netscape tolerance is on, ignore errors */
2127 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2128 goto cont;
2129 else
2130 {
2131 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2132 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2133 goto err;
2134 }
2135 }
2136
2137 if (q != (p+l))
2138 {
2139 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2140 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2141 goto err;
2142 }
2143 if (!sk_X509_NAME_push(ca_sk,xn))
2144 {
2145 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2146 goto err;
2147 }
2148
2149 p+=l;
2150 nc+=l+2;
2151 }
2152
2153 if (0)
2154 {
2155 cont:
2156 ERR_clear_error();
2157 }
2158
2159 /* we should setup a certificate to return.... */
2160 s->s3->tmp.cert_req=1;
2161 s->s3->tmp.ctype_num=ctype_num;
2162 if (s->s3->tmp.ca_names != NULL)
2163 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2164 s->s3->tmp.ca_names=ca_sk;
2165 ca_sk=NULL;
2166
2167 ret=1;
2168 err:
2169 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2170 return(ret);
2171 }
2172
2173 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2174 {
2175 return(X509_NAME_cmp(*a,*b));
2176 }
2177 #ifndef OPENSSL_NO_TLSEXT
2178 int ssl3_get_new_session_ticket(SSL *s)
2179 {
2180 int ok,al,ret=0, ticklen;
2181 long n;
2182 const unsigned char *p;
2183 unsigned char *d;
2184
2185 n=s->method->ssl_get_message(s,
2186 SSL3_ST_CR_SESSION_TICKET_A,
2187 SSL3_ST_CR_SESSION_TICKET_B,
2188 -1,
2189 16384,
2190 &ok);
2191
2192 if (!ok)
2193 return((int)n);
2194
2195 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2196 {
2197 s->s3->tmp.reuse_message=1;
2198 return(1);
2199 }
2200 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2201 {
2202 al=SSL_AD_UNEXPECTED_MESSAGE;
2203 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2204 goto f_err;
2205 }
2206 if (n < 6)
2207 {
2208 /* need at least ticket_lifetime_hint + ticket length */
2209 al = SSL_AD_DECODE_ERROR;
2210 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2211 goto f_err;
2212 }
2213
2214 p=d=(unsigned char *)s->init_msg;
2215 n2l(p, s->session->tlsext_tick_lifetime_hint);
2216 n2s(p, ticklen);
2217 /* ticket_lifetime_hint + ticket_length + ticket */
2218 if (ticklen + 6 != n)
2219 {
2220 al = SSL_AD_DECODE_ERROR;
2221 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2222 goto f_err;
2223 }
2224 if (s->session->tlsext_tick)
2225 {
2226 OPENSSL_free(s->session->tlsext_tick);
2227 s->session->tlsext_ticklen = 0;
2228 }
2229 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2230 if (!s->session->tlsext_tick)
2231 {
2232 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2233 goto err;
2234 }
2235 memcpy(s->session->tlsext_tick, p, ticklen);
2236 s->session->tlsext_ticklen = ticklen;
2237 /* There are two ways to detect a resumed ticket sesion.
2238 * One is to set an appropriate session ID and then the server
2239 * must return a match in ServerHello. This allows the normal
2240 * client session ID matching to work and we know much
2241 * earlier that the ticket has been accepted.
2242 *
2243 * The other way is to set zero length session ID when the
2244 * ticket is presented and rely on the handshake to determine
2245 * session resumption.
2246 *
2247 * We choose the former approach because this fits in with
2248 * assumptions elsewhere in OpenSSL. The session ID is set
2249 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2250 * ticket.
2251 */
2252 EVP_Digest(p, ticklen,
2253 s->session->session_id, &s->session->session_id_length,
2254 #ifndef OPENSSL_NO_SHA256
2255 EVP_sha256(), NULL);
2256 #else
2257 EVP_sha1(), NULL);
2258 #endif
2259 ret=1;
2260 return(ret);
2261 f_err:
2262 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2263 err:
2264 return(-1);
2265 }
2266
2267 int ssl3_get_cert_status(SSL *s)
2268 {
2269 int ok, al;
2270 unsigned long resplen,n;
2271 const unsigned char *p;
2272
2273 n=s->method->ssl_get_message(s,
2274 SSL3_ST_CR_CERT_STATUS_A,
2275 SSL3_ST_CR_CERT_STATUS_B,
2276 SSL3_MT_CERTIFICATE_STATUS,
2277 16384,
2278 &ok);
2279
2280 if (!ok) return((int)n);
2281 if (n < 4)
2282 {
2283 /* need at least status type + length */
2284 al = SSL_AD_DECODE_ERROR;
2285 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2286 goto f_err;
2287 }
2288 p = (unsigned char *)s->init_msg;
2289 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2290 {
2291 al = SSL_AD_DECODE_ERROR;
2292 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2293 goto f_err;
2294 }
2295 n2l3(p, resplen);
2296 if (resplen + 4 != n)
2297 {
2298 al = SSL_AD_DECODE_ERROR;
2299 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2300 goto f_err;
2301 }
2302 if (s->tlsext_ocsp_resp)
2303 OPENSSL_free(s->tlsext_ocsp_resp);
2304 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2305 if (!s->tlsext_ocsp_resp)
2306 {
2307 al = SSL_AD_INTERNAL_ERROR;
2308 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2309 goto f_err;
2310 }
2311 s->tlsext_ocsp_resplen = resplen;
2312 if (s->ctx->tlsext_status_cb)
2313 {
2314 int ret;
2315 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2316 if (ret == 0)
2317 {
2318 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2319 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2320 goto f_err;
2321 }
2322 if (ret < 0)
2323 {
2324 al = SSL_AD_INTERNAL_ERROR;
2325 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2326 goto f_err;
2327 }
2328 }
2329 return 1;
2330 f_err:
2331 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2332 return(-1);
2333 }
2334 #endif
2335
2336 int ssl3_get_server_done(SSL *s)
2337 {
2338 int ok,ret=0;
2339 long n;
2340
2341 n=s->method->ssl_get_message(s,
2342 SSL3_ST_CR_SRVR_DONE_A,
2343 SSL3_ST_CR_SRVR_DONE_B,
2344 SSL3_MT_SERVER_DONE,
2345 30, /* should be very small, like 0 :-) */
2346 &ok);
2347
2348 if (!ok) return((int)n);
2349 if (n > 0)
2350 {
2351 /* should contain no data */
2352 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2353 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2354 return -1;
2355 }
2356 ret=1;
2357 return(ret);
2358 }
2359
2360
2361 int ssl3_send_client_key_exchange(SSL *s)
2362 {
2363 unsigned char *p;
2364 int n;
2365 unsigned long alg_k;
2366 #ifndef OPENSSL_NO_RSA
2367 unsigned char *q;
2368 EVP_PKEY *pkey=NULL;
2369 #endif
2370 #ifndef OPENSSL_NO_KRB5
2371 KSSL_ERR kssl_err;
2372 #endif /* OPENSSL_NO_KRB5 */
2373 #ifndef OPENSSL_NO_ECDH
2374 EC_KEY *clnt_ecdh = NULL;
2375 const EC_POINT *srvr_ecpoint = NULL;
2376 EVP_PKEY *srvr_pub_pkey = NULL;
2377 unsigned char *encodedPoint = NULL;
2378 int encoded_pt_len = 0;
2379 BN_CTX * bn_ctx = NULL;
2380 #endif
2381
2382 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2383 {
2384 p = ssl_handshake_start(s);
2385
2386 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2387
2388 /* Fool emacs indentation */
2389 if (0) {}
2390 #ifndef OPENSSL_NO_RSA
2391 else if (alg_k & SSL_kRSA)
2392 {
2393 RSA *rsa;
2394 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2395
2396 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2397 rsa=s->session->sess_cert->peer_rsa_tmp;
2398 else
2399 {
2400 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2401 if ((pkey == NULL) ||
2402 (pkey->type != EVP_PKEY_RSA) ||
2403 (pkey->pkey.rsa == NULL))
2404 {
2405 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2406 goto err;
2407 }
2408 rsa=pkey->pkey.rsa;
2409 EVP_PKEY_free(pkey);
2410 }
2411
2412 tmp_buf[0]=s->client_version>>8;
2413 tmp_buf[1]=s->client_version&0xff;
2414 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2415 goto err;
2416
2417 s->session->master_key_length=sizeof tmp_buf;
2418
2419 q=p;
2420 /* Fix buf for TLS and beyond */
2421 if (s->version > SSL3_VERSION)
2422 p+=2;
2423 n=RSA_public_encrypt(sizeof tmp_buf,
2424 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2425 #ifdef PKCS1_CHECK
2426 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2427 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2428 #endif
2429 if (n <= 0)
2430 {
2431 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2432 goto err;
2433 }
2434
2435 /* Fix buf for TLS and beyond */
2436 if (s->version > SSL3_VERSION)
2437 {
2438 s2n(n,q);
2439 n+=2;
2440 }
2441
2442 s->session->master_key_length=
2443 s->method->ssl3_enc->generate_master_secret(s,
2444 s->session->master_key,
2445 tmp_buf,sizeof tmp_buf);
2446 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2447 }
2448 #endif
2449 #ifndef OPENSSL_NO_KRB5
2450 else if (alg_k & SSL_kKRB5)
2451 {
2452 krb5_error_code krb5rc;
2453 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2454 /* krb5_data krb5_ap_req; */
2455 krb5_data *enc_ticket;
2456 krb5_data authenticator, *authp = NULL;
2457 EVP_CIPHER_CTX ciph_ctx;
2458 const EVP_CIPHER *enc = NULL;
2459 unsigned char iv[EVP_MAX_IV_LENGTH];
2460 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2461 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2462 + EVP_MAX_IV_LENGTH];
2463 int padl, outl = sizeof(epms);
2464
2465 EVP_CIPHER_CTX_init(&ciph_ctx);
2466
2467 #ifdef KSSL_DEBUG
2468 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2469 alg_k, SSL_kKRB5);
2470 #endif /* KSSL_DEBUG */
2471
2472 authp = NULL;
2473 #ifdef KRB5SENDAUTH
2474 if (KRB5SENDAUTH) authp = &authenticator;
2475 #endif /* KRB5SENDAUTH */
2476
2477 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2478 &kssl_err);
2479 enc = kssl_map_enc(kssl_ctx->enctype);
2480 if (enc == NULL)
2481 goto err;
2482 #ifdef KSSL_DEBUG
2483 {
2484 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2485 if (krb5rc && kssl_err.text)
2486 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2487 }
2488 #endif /* KSSL_DEBUG */
2489
2490 if (krb5rc)
2491 {
2492 ssl3_send_alert(s,SSL3_AL_FATAL,
2493 SSL_AD_HANDSHAKE_FAILURE);
2494 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2495 kssl_err.reason);
2496 goto err;
2497 }
2498
2499 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2500 ** in place of RFC 2712 KerberosWrapper, as in:
2501 **
2502 ** Send ticket (copy to *p, set n = length)
2503 ** n = krb5_ap_req.length;
2504 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2505 ** if (krb5_ap_req.data)
2506 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2507 **
2508 ** Now using real RFC 2712 KerberosWrapper
2509 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2510 ** Note: 2712 "opaque" types are here replaced
2511 ** with a 2-byte length followed by the value.
2512 ** Example:
2513 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2514 ** Where "xx xx" = length bytes. Shown here with
2515 ** optional authenticator omitted.
2516 */
2517
2518 /* KerberosWrapper.Ticket */
2519 s2n(enc_ticket->length,p);
2520 memcpy(p, enc_ticket->data, enc_ticket->length);
2521 p+= enc_ticket->length;
2522 n = enc_ticket->length + 2;
2523
2524 /* KerberosWrapper.Authenticator */
2525 if (authp && authp->length)
2526 {
2527 s2n(authp->length,p);
2528 memcpy(p, authp->data, authp->length);
2529 p+= authp->length;
2530 n+= authp->length + 2;
2531
2532 free(authp->data);
2533 authp->data = NULL;
2534 authp->length = 0;
2535 }
2536 else
2537 {
2538 s2n(0,p);/* null authenticator length */
2539 n+=2;
2540 }
2541
2542 tmp_buf[0]=s->client_version>>8;
2543 tmp_buf[1]=s->client_version&0xff;
2544 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2545 goto err;
2546
2547 /* 20010420 VRS. Tried it this way; failed.
2548 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2549 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2550 ** kssl_ctx->length);
2551 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2552 */
2553
2554 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2555 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2556 kssl_ctx->key,iv);
2557 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2558 sizeof tmp_buf);
2559 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2560 outl += padl;
2561 if (outl > (int)sizeof epms)
2562 {
2563 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2564 goto err;
2565 }
2566 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2567
2568 /* KerberosWrapper.EncryptedPreMasterSecret */
2569 s2n(outl,p);
2570 memcpy(p, epms, outl);
2571 p+=outl;
2572 n+=outl + 2;
2573
2574 s->session->master_key_length=
2575 s->method->ssl3_enc->generate_master_secret(s,
2576 s->session->master_key,
2577 tmp_buf, sizeof tmp_buf);
2578
2579 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2580 OPENSSL_cleanse(epms, outl);
2581 }
2582 #endif
2583 #ifndef OPENSSL_NO_DH
2584 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2585 {
2586 DH *dh_srvr,*dh_clnt;
2587 SESS_CERT *scert = s->session->sess_cert;
2588
2589 if (scert == NULL)
2590 {
2591 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2592 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2593 goto err;
2594 }
2595
2596 if (scert->peer_dh_tmp != NULL)
2597 dh_srvr=scert->peer_dh_tmp;
2598 else
2599 {
2600 /* we get them from the cert */
2601 int idx = scert->peer_cert_type;
2602 EVP_PKEY *spkey = NULL;
2603 dh_srvr = NULL;
2604 if (idx >= 0)
2605 spkey = X509_get_pubkey(
2606 scert->peer_pkeys[idx].x509);
2607 if (spkey)
2608 {
2609 dh_srvr = EVP_PKEY_get1_DH(spkey);
2610 EVP_PKEY_free(spkey);
2611 }
2612 if (dh_srvr == NULL)
2613 {
2614 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2615 ERR_R_INTERNAL_ERROR);
2616 goto err;
2617 }
2618 }
2619 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2620 {
2621 /* Use client certificate key */
2622 EVP_PKEY *clkey = s->cert->key->privatekey;
2623 dh_clnt = NULL;
2624 if (clkey)
2625 dh_clnt = EVP_PKEY_get1_DH(clkey);
2626 if (dh_clnt == NULL)
2627 {
2628 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2629 ERR_R_INTERNAL_ERROR);
2630 goto err;
2631 }
2632 }
2633 else
2634 {
2635 /* generate a new random key */
2636 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2637 {
2638 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2639 goto err;
2640 }
2641 if (!DH_generate_key(dh_clnt))
2642 {
2643 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2644 DH_free(dh_clnt);
2645 goto err;
2646 }
2647 }
2648
2649 /* use the 'p' output buffer for the DH key, but
2650 * make sure to clear it out afterwards */
2651
2652 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2653 if (scert->peer_dh_tmp == NULL)
2654 DH_free(dh_srvr);
2655
2656 if (n <= 0)
2657 {
2658 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2659 DH_free(dh_clnt);
2660 goto err;
2661 }
2662
2663 /* generate master key from the result */
2664 s->session->master_key_length=
2665 s->method->ssl3_enc->generate_master_secret(s,
2666 s->session->master_key,p,n);
2667 /* clean up */
2668 memset(p,0,n);
2669
2670 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2671 n = 0;
2672 else
2673 {
2674 /* send off the data */
2675 n=BN_num_bytes(dh_clnt->pub_key);
2676 s2n(n,p);
2677 BN_bn2bin(dh_clnt->pub_key,p);
2678 n+=2;
2679 }
2680
2681 DH_free(dh_clnt);
2682
2683 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2684 }
2685 #endif
2686
2687 #ifndef OPENSSL_NO_ECDH
2688 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2689 {
2690 const EC_GROUP *srvr_group = NULL;
2691 EC_KEY *tkey;
2692 int ecdh_clnt_cert = 0;
2693 int field_size = 0;
2694
2695 /* Did we send out the client's
2696 * ECDH share for use in premaster
2697 * computation as part of client certificate?
2698 * If so, set ecdh_clnt_cert to 1.
2699 */
2700 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2701 {
2702 /* XXX: For now, we do not support client
2703 * authentication using ECDH certificates.
2704 * To add such support, one needs to add
2705 * code that checks for appropriate
2706 * conditions and sets ecdh_clnt_cert to 1.
2707 * For example, the cert have an ECC
2708 * key on the same curve as the server's
2709 * and the key should be authorized for
2710 * key agreement.
2711 *
2712 * One also needs to add code in ssl3_connect
2713 * to skip sending the certificate verify
2714 * message.
2715 *
2716 * if ((s->cert->key->privatekey != NULL) &&
2717 * (s->cert->key->privatekey->type ==
2718 * EVP_PKEY_EC) && ...)
2719 * ecdh_clnt_cert = 1;
2720 */
2721 }
2722
2723 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2724 {
2725 tkey = s->session->sess_cert->peer_ecdh_tmp;
2726 }
2727 else
2728 {
2729 /* Get the Server Public Key from Cert */
2730 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2731 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2732 if ((srvr_pub_pkey == NULL) ||
2733 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2734 (srvr_pub_pkey->pkey.ec == NULL))
2735 {
2736 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2737 ERR_R_INTERNAL_ERROR);
2738 goto err;
2739 }
2740
2741 tkey = srvr_pub_pkey->pkey.ec;
2742 }
2743
2744 srvr_group = EC_KEY_get0_group(tkey);
2745 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2746
2747 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2748 {
2749 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2750 ERR_R_INTERNAL_ERROR);
2751 goto err;
2752 }
2753
2754 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2755 {
2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2757 goto err;
2758 }
2759
2760 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2761 {
2762 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2763 goto err;
2764 }
2765 if (ecdh_clnt_cert)
2766 {
2767 /* Reuse key info from our certificate
2768 * We only need our private key to perform
2769 * the ECDH computation.
2770 */
2771 const BIGNUM *priv_key;
2772 tkey = s->cert->key->privatekey->pkey.ec;
2773 priv_key = EC_KEY_get0_private_key(tkey);
2774 if (priv_key == NULL)
2775 {
2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2777 goto err;
2778 }
2779 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2780 {
2781 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2782 goto err;
2783 }
2784 }
2785 else
2786 {
2787 /* Generate a new ECDH key pair */
2788 if (!(EC_KEY_generate_key(clnt_ecdh)))
2789 {
2790 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2791 goto err;
2792 }
2793 }
2794
2795 /* use the 'p' output buffer for the ECDH key, but
2796 * make sure to clear it out afterwards
2797 */
2798
2799 field_size = EC_GROUP_get_degree(srvr_group);
2800 if (field_size <= 0)
2801 {
2802 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2803 ERR_R_ECDH_LIB);
2804 goto err;
2805 }
2806 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2807 if (n <= 0)
2808 {
2809 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2810 ERR_R_ECDH_LIB);
2811 goto err;
2812 }
2813
2814 /* generate master key from the result */
2815 s->session->master_key_length = s->method->ssl3_enc \
2816 -> generate_master_secret(s,
2817 s->session->master_key,
2818 p, n);
2819
2820 memset(p, 0, n); /* clean up */
2821
2822 if (ecdh_clnt_cert)
2823 {
2824 /* Send empty client key exch message */
2825 n = 0;
2826 }
2827 else
2828 {
2829 /* First check the size of encoding and
2830 * allocate memory accordingly.
2831 */
2832 encoded_pt_len =
2833 EC_POINT_point2oct(srvr_group,
2834 EC_KEY_get0_public_key(clnt_ecdh),
2835 POINT_CONVERSION_UNCOMPRESSED,
2836 NULL, 0, NULL);
2837
2838 encodedPoint = (unsigned char *)
2839 OPENSSL_malloc(encoded_pt_len *
2840 sizeof(unsigned char));
2841 bn_ctx = BN_CTX_new();
2842 if ((encodedPoint == NULL) ||
2843 (bn_ctx == NULL))
2844 {
2845 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2846 goto err;
2847 }
2848
2849 /* Encode the public key */
2850 n = EC_POINT_point2oct(srvr_group,
2851 EC_KEY_get0_public_key(clnt_ecdh),
2852 POINT_CONVERSION_UNCOMPRESSED,
2853 encodedPoint, encoded_pt_len, bn_ctx);
2854
2855 *p = n; /* length of encoded point */
2856 /* Encoded point will be copied here */
2857 p += 1;
2858 /* copy the point */
2859 memcpy((unsigned char *)p, encodedPoint, n);
2860 /* increment n to account for length field */
2861 n += 1;
2862 }
2863
2864 /* Free allocated memory */
2865 BN_CTX_free(bn_ctx);
2866 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2867 if (clnt_ecdh != NULL)
2868 EC_KEY_free(clnt_ecdh);
2869 EVP_PKEY_free(srvr_pub_pkey);
2870 }
2871 #endif /* !OPENSSL_NO_ECDH */
2872 else if (alg_k & SSL_kGOST)
2873 {
2874 /* GOST key exchange message creation */
2875 EVP_PKEY_CTX *pkey_ctx;
2876 X509 *peer_cert;
2877 size_t msglen;
2878 unsigned int md_len;
2879 int keytype;
2880 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2881 EVP_MD_CTX *ukm_hash;
2882 EVP_PKEY *pub_key;
2883
2884 /* Get server sertificate PKEY and create ctx from it */
2885 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2886 if (!peer_cert)
2887 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2888 if (!peer_cert) {
2889 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2890 goto err;
2891 }
2892
2893 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2894 /* If we have send a certificate, and certificate key
2895
2896 * parameters match those of server certificate, use
2897 * certificate key for key exchange
2898 */
2899
2900 /* Otherwise, generate ephemeral key pair */
2901
2902 EVP_PKEY_encrypt_init(pkey_ctx);
2903 /* Generate session key */
2904 RAND_bytes(premaster_secret,32);
2905 /* If we have client certificate, use its secret as peer key */
2906 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2907 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2908 /* If there was an error - just ignore it. Ephemeral key
2909 * would be used
2910 */
2911 ERR_clear_error();
2912 }
2913 }
2914 /* Compute shared IV and store it in algorithm-specific
2915 * context data */
2916 ukm_hash = EVP_MD_CTX_create();
2917 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2918 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2919 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2920 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2921 EVP_MD_CTX_destroy(ukm_hash);
2922 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2923 8,shared_ukm)<0) {
2924 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2925 SSL_R_LIBRARY_BUG);
2926 goto err;
2927 }
2928 /* Make GOST keytransport blob message */
2929 /*Encapsulate it into sequence */
2930 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2931 msglen=255;
2932 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2933 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2934 SSL_R_LIBRARY_BUG);
2935 goto err;
2936 }
2937 if (msglen >= 0x80)
2938 {
2939 *(p++)=0x81;
2940 *(p++)= msglen & 0xff;
2941 n=msglen+3;
2942 }
2943 else
2944 {
2945 *(p++)= msglen & 0xff;
2946 n=msglen+2;
2947 }
2948 memcpy(p, tmp, msglen);
2949 /* Check if pubkey from client certificate was used */
2950 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2951 {
2952 /* Set flag "skip certificate verify" */
2953 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2954 }
2955 EVP_PKEY_CTX_free(pkey_ctx);
2956 s->session->master_key_length=
2957 s->method->ssl3_enc->generate_master_secret(s,
2958 s->session->master_key,premaster_secret,32);
2959 EVP_PKEY_free(pub_key);
2960
2961 }
2962 #ifndef OPENSSL_NO_SRP
2963 else if (alg_k & SSL_kSRP)
2964 {
2965 if (s->srp_ctx.A != NULL)
2966 {
2967 /* send off the data */
2968 n=BN_num_bytes(s->srp_ctx.A);
2969 s2n(n,p);
2970 BN_bn2bin(s->srp_ctx.A,p);
2971 n+=2;
2972 }
2973 else
2974 {
2975 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2976 goto err;
2977 }
2978 if (s->session->srp_username != NULL)
2979 OPENSSL_free(s->session->srp_username);
2980 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2981 if (s->session->srp_username == NULL)
2982 {
2983 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2984 ERR_R_MALLOC_FAILURE);
2985 goto err;
2986 }
2987
2988 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2989 {
2990 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2991 goto err;
2992 }
2993 }
2994 #endif
2995 #ifndef OPENSSL_NO_PSK
2996 else if (alg_k & SSL_kPSK)
2997 {
2998 char identity[PSK_MAX_IDENTITY_LEN];
2999 unsigned char *t = NULL;
3000 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3001 unsigned int pre_ms_len = 0, psk_len = 0;
3002 int psk_err = 1;
3003
3004 n = 0;
3005 if (s->psk_client_callback == NULL)
3006 {
3007 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3008 SSL_R_PSK_NO_CLIENT_CB);
3009 goto err;
3010 }
3011
3012 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3013 identity, PSK_MAX_IDENTITY_LEN,
3014 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3015 if (psk_len > PSK_MAX_PSK_LEN)
3016 {
3017 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3018 ERR_R_INTERNAL_ERROR);
3019 goto psk_err;
3020 }
3021 else if (psk_len == 0)
3022 {
3023 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3024 SSL_R_PSK_IDENTITY_NOT_FOUND);
3025 goto psk_err;
3026 }
3027
3028 /* create PSK pre_master_secret */
3029 pre_ms_len = 2+psk_len+2+psk_len;
3030 t = psk_or_pre_ms;
3031 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3032 s2n(psk_len, t);
3033 memset(t, 0, psk_len);
3034 t+=psk_len;
3035 s2n(psk_len, t);
3036
3037 if (s->session->psk_identity_hint != NULL)
3038 OPENSSL_free(s->session->psk_identity_hint);
3039 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3040 if (s->ctx->psk_identity_hint != NULL &&
3041 s->session->psk_identity_hint == NULL)
3042 {
3043 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3044 ERR_R_MALLOC_FAILURE);
3045 goto psk_err;
3046 }
3047
3048 if (s->session->psk_identity != NULL)
3049 OPENSSL_free(s->session->psk_identity);
3050 s->session->psk_identity = BUF_strdup(identity);
3051 if (s->session->psk_identity == NULL)
3052 {
3053 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3054 ERR_R_MALLOC_FAILURE);
3055 goto psk_err;
3056 }
3057
3058 s->session->master_key_length =
3059 s->method->ssl3_enc->generate_master_secret(s,
3060 s->session->master_key,
3061 psk_or_pre_ms, pre_ms_len);
3062 n = strlen(identity);
3063 s2n(n, p);
3064 memcpy(p, identity, n);
3065 n+=2;
3066 psk_err = 0;
3067 psk_err:
3068 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3069 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3070 if (psk_err != 0)
3071 {
3072 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3073 goto err;
3074 }
3075 }
3076 #endif
3077 else
3078 {
3079 ssl3_send_alert(s, SSL3_AL_FATAL,
3080 SSL_AD_HANDSHAKE_FAILURE);
3081 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3082 ERR_R_INTERNAL_ERROR);
3083 goto err;
3084 }
3085
3086 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3087 s->state=SSL3_ST_CW_KEY_EXCH_B;
3088 }
3089
3090 /* SSL3_ST_CW_KEY_EXCH_B */
3091 return ssl_do_write(s);
3092 err:
3093 #ifndef OPENSSL_NO_ECDH
3094 BN_CTX_free(bn_ctx);
3095 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3096 if (clnt_ecdh != NULL)
3097 EC_KEY_free(clnt_ecdh);
3098 EVP_PKEY_free(srvr_pub_pkey);
3099 #endif
3100 return(-1);
3101 }
3102
3103 int ssl3_send_client_verify(SSL *s)
3104 {
3105 unsigned char *p;
3106 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3107 EVP_PKEY *pkey;
3108 EVP_PKEY_CTX *pctx=NULL;
3109 EVP_MD_CTX mctx;
3110 unsigned u=0;
3111 unsigned long n;
3112 int j;
3113
3114 EVP_MD_CTX_init(&mctx);
3115
3116 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3117 {
3118 p= ssl_handshake_start(s);
3119 pkey=s->cert->key->privatekey;
3120 /* Create context from key and test if sha1 is allowed as digest */
3121 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3122 EVP_PKEY_sign_init(pctx);
3123 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3124 {
3125 if (!SSL_USE_SIGALGS(s))
3126 s->method->ssl3_enc->cert_verify_mac(s,
3127 NID_sha1,
3128 &(data[MD5_DIGEST_LENGTH]));
3129 }
3130 else
3131 {
3132 ERR_clear_error();
3133 }
3134 /* For TLS v1.2 send signature algorithm and signature
3135 * using agreed digest and cached handshake records.
3136 */
3137 if (SSL_USE_SIGALGS(s))
3138 {
3139 long hdatalen = 0;
3140 void *hdata;
3141 const EVP_MD *md = s->cert->key->digest;
3142 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3143 &hdata);
3144 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3145 {
3146 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3147 ERR_R_INTERNAL_ERROR);
3148 goto err;
3149 }
3150 p += 2;
3151 #ifdef SSL_DEBUG
3152 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3153 EVP_MD_name(md));
3154 #endif
3155 if (!EVP_SignInit_ex(&mctx, md, NULL)
3156 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3157 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3158 {
3159 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3160 ERR_R_EVP_LIB);
3161 goto err;
3162 }
3163 s2n(u,p);
3164 n = u + 4;
3165 if (!ssl3_digest_cached_records(s))
3166 goto err;
3167 }
3168 else
3169 #ifndef OPENSSL_NO_RSA
3170 if (pkey->type == EVP_PKEY_RSA)
3171 {
3172 s->method->ssl3_enc->cert_verify_mac(s,
3173 NID_md5,
3174 &(data[0]));
3175 if (RSA_sign(NID_md5_sha1, data,
3176 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3177 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3178 {
3179 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3180 goto err;
3181 }
3182 s2n(u,p);
3183 n=u+2;
3184 }
3185 else
3186 #endif
3187 #ifndef OPENSSL_NO_DSA
3188 if (pkey->type == EVP_PKEY_DSA)
3189 {
3190 if (!DSA_sign(pkey->save_type,
3191 &(data[MD5_DIGEST_LENGTH]),
3192 SHA_DIGEST_LENGTH,&(p[2]),
3193 (unsigned int *)&j,pkey->pkey.dsa))
3194 {
3195 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3196 goto err;
3197 }
3198 s2n(j,p);
3199 n=j+2;
3200 }
3201 else
3202 #endif
3203 #ifndef OPENSSL_NO_ECDSA
3204 if (pkey->type == EVP_PKEY_EC)
3205 {
3206 if (!ECDSA_sign(pkey->save_type,
3207 &(data[MD5_DIGEST_LENGTH]),
3208 SHA_DIGEST_LENGTH,&(p[2]),
3209 (unsigned int *)&j,pkey->pkey.ec))
3210 {
3211 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3212 ERR_R_ECDSA_LIB);
3213 goto err;
3214 }
3215 s2n(j,p);
3216 n=j+2;
3217 }
3218 else
3219 #endif
3220 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3221 {
3222 unsigned char signbuf[64];
3223 int i;
3224 size_t sigsize=64;
3225 s->method->ssl3_enc->cert_verify_mac(s,
3226 NID_id_GostR3411_94,
3227 data);
3228 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3229 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3230 ERR_R_INTERNAL_ERROR);
3231 goto err;
3232 }
3233 for (i=63,j=0; i>=0; j++, i--) {
3234 p[2+j]=signbuf[i];
3235 }
3236 s2n(j,p);
3237 n=j+2;
3238 }
3239 else
3240 {
3241 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3242 goto err;
3243 }
3244 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3245 s->state=SSL3_ST_CW_CERT_VRFY_B;
3246 }
3247 EVP_MD_CTX_cleanup(&mctx);
3248 EVP_PKEY_CTX_free(pctx);
3249 return ssl_do_write(s);
3250 err:
3251 EVP_MD_CTX_cleanup(&mctx);
3252 EVP_PKEY_CTX_free(pctx);
3253 return(-1);
3254 }
3255
3256 /* Check a certificate can be used for client authentication. Currently
3257 * check cert exists, if we have a suitable digest for TLS 1.2 if
3258 * static DH client certificates can be used and optionally checks
3259 * suitability for Suite B.
3260 */
3261 static int ssl3_check_client_certificate(SSL *s)
3262 {
3263 unsigned long alg_k;
3264 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3265 return 0;
3266 /* If no suitable signature algorithm can't use certificate */
3267 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3268 return 0;
3269 /* If strict mode check suitability of chain before using it.
3270 * This also adjusts suite B digest if necessary.
3271 */
3272 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3273 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3274 return 0;
3275 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3276 /* See if we can use client certificate for fixed DH */
3277 if (alg_k & (SSL_kDHr|SSL_kDHd))
3278 {
3279 SESS_CERT *scert = s->session->sess_cert;
3280 int i = scert->peer_cert_type;
3281 EVP_PKEY *clkey = NULL, *spkey = NULL;
3282 clkey = s->cert->key->privatekey;
3283 /* If client key not DH assume it can be used */
3284 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3285 return 1;
3286 if (i >= 0)
3287 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3288 if (spkey)
3289 {
3290 /* Compare server and client parameters */
3291 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3292 EVP_PKEY_free(spkey);
3293 if (i != 1)
3294 return 0;
3295 }
3296 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3297 }
3298 return 1;
3299 }
3300
3301 int ssl3_send_client_certificate(SSL *s)
3302 {
3303 X509 *x509=NULL;
3304 EVP_PKEY *pkey=NULL;
3305 int i;
3306
3307 if (s->state == SSL3_ST_CW_CERT_A)
3308 {
3309 /* Let cert callback update client certificates if required */
3310 if (s->cert->cert_cb)
3311 {
3312 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3313 if (i < 0)
3314 {
3315 s->rwstate=SSL_X509_LOOKUP;
3316 return -1;
3317 }
3318 if (i == 0)
3319 {
3320 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3321 return 0;
3322 }
3323 s->rwstate=SSL_NOTHING;
3324 }
3325 if (ssl3_check_client_certificate(s))
3326 s->state=SSL3_ST_CW_CERT_C;
3327 else
3328 s->state=SSL3_ST_CW_CERT_B;
3329 }
3330
3331 /* We need to get a client cert */
3332 if (s->state == SSL3_ST_CW_CERT_B)
3333 {
3334 /* If we get an error, we need to
3335 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3336 * We then get retied later */
3337 i=0;
3338 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3339 if (i < 0)
3340 {
3341 s->rwstate=SSL_X509_LOOKUP;
3342 return(-1);
3343 }
3344 s->rwstate=SSL_NOTHING;
3345 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3346 {
3347 s->state=SSL3_ST_CW_CERT_B;
3348 if ( !SSL_use_certificate(s,x509) ||
3349 !SSL_use_PrivateKey(s,pkey))
3350 i=0;
3351 }
3352 else if (i == 1)
3353 {
3354 i=0;
3355 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3356 }
3357
3358 if (x509 != NULL) X509_free(x509);
3359 if (pkey != NULL) EVP_PKEY_free(pkey);
3360 if (i && !ssl3_check_client_certificate(s))
3361 i = 0;
3362 if (i == 0)
3363 {
3364 if (s->version == SSL3_VERSION)
3365 {
3366 s->s3->tmp.cert_req=0;
3367 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3368 return(1);
3369 }
3370 else
3371 {
3372 s->s3->tmp.cert_req=2;
3373 }
3374 }
3375
3376 /* Ok, we have a cert */
3377 s->state=SSL3_ST_CW_CERT_C;
3378 }
3379
3380 if (s->state == SSL3_ST_CW_CERT_C)
3381 {
3382 s->state=SSL3_ST_CW_CERT_D;
3383 if (!ssl3_output_cert_chain(s,
3384 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3385 {
3386 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3387 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3388 return 0;
3389 }
3390 }
3391 /* SSL3_ST_CW_CERT_D */
3392 return ssl_do_write(s);
3393 }
3394
3395 #define has_bits(i,m) (((i)&(m)) == (m))
3396
3397 int ssl3_check_cert_and_algorithm(SSL *s)
3398 {
3399 int i,idx;
3400 long alg_k,alg_a;
3401 EVP_PKEY *pkey=NULL;
3402 SESS_CERT *sc;
3403 #ifndef OPENSSL_NO_RSA
3404 RSA *rsa;
3405 #endif
3406 #ifndef OPENSSL_NO_DH
3407 DH *dh;
3408 #endif
3409
3410 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3411 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3412
3413 /* we don't have a certificate */
3414 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3415 return(1);
3416
3417 sc=s->session->sess_cert;
3418 if (sc == NULL)
3419 {
3420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3421 goto err;
3422 }
3423
3424 #ifndef OPENSSL_NO_RSA
3425 rsa=s->session->sess_cert->peer_rsa_tmp;
3426 #endif
3427 #ifndef OPENSSL_NO_DH
3428 dh=s->session->sess_cert->peer_dh_tmp;
3429 #endif
3430
3431 /* This is the passed certificate */
3432
3433 idx=sc->peer_cert_type;
3434 #ifndef OPENSSL_NO_ECDH
3435 if (idx == SSL_PKEY_ECC)
3436 {
3437 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3438 s) == 0)
3439 { /* check failed */
3440 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3441 goto f_err;
3442 }
3443 else
3444 {
3445 return 1;
3446 }
3447 }
3448 else if (alg_a & SSL_aECDSA)
3449 {
3450 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3451 goto f_err;
3452 }
3453 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3454 {
3455 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3456 goto f_err;
3457 }
3458 #endif
3459 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3460 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3461 EVP_PKEY_free(pkey);
3462
3463
3464 /* Check that we have a certificate if we require one */
3465 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3466 {
3467 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3468 goto f_err;
3469 }
3470 #ifndef OPENSSL_NO_DSA
3471 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3472 {
3473 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3474 goto f_err;
3475 }
3476 #endif
3477 #ifndef OPENSSL_NO_RSA
3478 if ((alg_k & SSL_kRSA) &&
3479 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3480 {
3481 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3482 goto f_err;
3483 }
3484 #endif
3485 #ifndef OPENSSL_NO_DH
3486 if ((alg_k & SSL_kDHE) &&
3487 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3488 {
3489 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3490 goto f_err;
3491 }
3492 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3493 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3494 {
3495 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3496 goto f_err;
3497 }
3498 #ifndef OPENSSL_NO_DSA
3499 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3500 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3501 {
3502 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3503 goto f_err;
3504 }
3505 #endif
3506 #endif
3507
3508 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3509 {
3510 #ifndef OPENSSL_NO_RSA
3511 if (alg_k & SSL_kRSA)
3512 {
3513 if (rsa == NULL
3514 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3515 {
3516 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3517 goto f_err;
3518 }
3519 }
3520 else
3521 #endif
3522 #ifndef OPENSSL_NO_DH
3523 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3524 {
3525 if (dh == NULL
3526 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3527 {
3528 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3529 goto f_err;
3530 }
3531 }
3532 else
3533 #endif
3534 {
3535 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3536 goto f_err;
3537 }
3538 }
3539 return(1);
3540 f_err:
3541 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3542 err:
3543 return(0);
3544 }
3545
3546 /* Check to see if handshake is full or resumed. Usually this is just a
3547 * case of checking to see if a cache hit has occurred. In the case of
3548 * session tickets we have to check the next message to be sure.
3549 */
3550
3551 #ifndef OPENSSL_NO_TLSEXT
3552 # ifndef OPENSSL_NO_NEXTPROTONEG
3553 int ssl3_send_next_proto(SSL *s)
3554 {
3555 unsigned int len, padding_len;
3556 unsigned char *d;
3557
3558 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3559 {
3560 len = s->next_proto_negotiated_len;
3561 padding_len = 32 - ((len + 2) % 32);
3562 d = (unsigned char *)s->init_buf->data;
3563 d[4] = len;
3564 memcpy(d + 5, s->next_proto_negotiated, len);
3565 d[5 + len] = padding_len;
3566 memset(d + 6 + len, 0, padding_len);
3567 *(d++)=SSL3_MT_NEXT_PROTO;
3568 l2n3(2 + len + padding_len, d);
3569 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3570 s->init_num = 4 + 2 + len + padding_len;
3571 s->init_off = 0;
3572 }
3573
3574 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3575 }
3576 # endif
3577
3578 int ssl3_check_finished(SSL *s)
3579 {
3580 int ok;
3581 long n;
3582
3583 /* Read the message to see if it is supplemental data,
3584 * regardless if there is a session ticket this function is
3585 * called when we really expect a Certificate message, so
3586 * permit appropriate message length */
3587 n=s->method->ssl_get_message(s,
3588 SSL3_ST_CR_CERT_A,
3589 SSL3_ST_CR_CERT_B,
3590 -1,
3591 s->max_cert_list,
3592 &ok);
3593 if (!ok) return((int)n);
3594 s->s3->tmp.reuse_message = 1;
3595
3596 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3597 return 3;
3598 /* If we have no ticket it cannot be a resumed session. */
3599 if (!s->session->tlsext_tick)
3600 return 1;
3601 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3602 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3603 return 2;
3604
3605 return 1;
3606 }
3607 #endif
3608
3609 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3610 {
3611 int i = 0;
3612 #ifndef OPENSSL_NO_ENGINE
3613 if (s->ctx->client_cert_engine)
3614 {
3615 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3616 SSL_get_client_CA_list(s),
3617 px509, ppkey, NULL, NULL, NULL);
3618 if (i != 0)
3619 return i;
3620 }
3621 #endif
3622 if (s->ctx->client_cert_cb)
3623 i = s->ctx->client_cert_cb(s,px509,ppkey);
3624 return i;
3625 }
3626
3627 #ifndef OPENSSL_NO_TLSEXT
3628 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3629 {
3630 int al = 0;
3631 if (s->ctx->cli_supp_data_records_count)
3632 {
3633 unsigned char *p = NULL;
3634 unsigned char *size_loc = NULL;
3635 cli_supp_data_record *record = NULL;
3636 size_t length = 0;
3637 size_t i = 0;
3638
3639 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3640 {
3641 const unsigned char *out = NULL;
3642 unsigned short outlen = 0;
3643 int cb_retval = 0;
3644 record = &s->ctx->cli_supp_data_records[i];
3645
3646 /* NULL callback or -1 omits supp data entry*/
3647 if (!record->fn2)
3648 continue;
3649 cb_retval = record->fn2(s, record->supp_data_type,
3650 &out, &outlen, &al,
3651 record->arg);
3652 if (cb_retval == -1)
3653 continue; /* skip this supp data entry */
3654 if (cb_retval == 0)
3655 {
3656 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3657 goto f_err;
3658 }
3659 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3660 {
3661 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3662 return 0;
3663 }
3664 /* if first entry, write handshake message type */
3665 if (length == 0)
3666 {
3667 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3668 {
3669 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3670 return 0;
3671 }
3672 p = (unsigned char *)s->init_buf->data;
3673 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3674 /* update message length when all
3675 * callbacks complete */
3676 size_loc = p;
3677 /* skip over handshake length field (3
3678 * bytes) and supp_data length field
3679 * (3 bytes) */
3680 p += 3 + 3;
3681 length += 1 +3 +3;
3682 }
3683 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3684 {
3685 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3686 return 0;
3687 }
3688 s2n(record->supp_data_type, p);
3689 s2n(outlen, p);
3690 memcpy(p, out, outlen);
3691 length += (outlen + 4);
3692 p += outlen;
3693 }
3694 if (length > 0)
3695 {
3696 /* write handshake length */
3697 l2n3(length - 4, size_loc);
3698 /* supp_data length */
3699 l2n3(length - 7, size_loc);
3700 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3701 s->init_num = length;
3702 s->init_off = 0;
3703 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3704 }
3705 }
3706
3707 /* no supp data message sent */
3708 *skip = 1;
3709 s->init_num = 0;
3710 s->init_off = 0;
3711 return 1;
3712
3713 f_err:
3714 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3715 return 0;
3716 }
3717
3718 int tls1_get_server_supplemental_data(SSL *s)
3719 {
3720 int al = 0;
3721 int ok;
3722 long n;
3723 const unsigned char *p, *d;
3724 unsigned short supp_data_entry_type = 0;
3725 unsigned short supp_data_entry_len = 0;
3726 unsigned long supp_data_len = 0;
3727 size_t i;
3728 int cb_retval = 0;
3729
3730 n=s->method->ssl_get_message(s,
3731 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3732 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3733 SSL3_MT_SUPPLEMENTAL_DATA,
3734 /* use default limit */
3735 TLSEXT_MAXLEN_supplemental_data,
3736 &ok);
3737
3738 if (!ok) return((int)n);
3739
3740 p = (unsigned char *)s->init_msg;
3741 d = p;
3742 /* The message cannot be empty */
3743 if (n < 3)
3744 {
3745 al = SSL_AD_DECODE_ERROR;
3746 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3747 goto f_err;
3748 }
3749 n2l3(p, supp_data_len);
3750 while (p < d+supp_data_len)
3751 {
3752 n2s(p, supp_data_entry_type);
3753 n2s(p, supp_data_entry_len);
3754 /* if there is a callback for this supp data type, send it */
3755 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3756 {
3757 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3758 s->ctx->cli_supp_data_records[i].fn1)
3759 {
3760 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3761 supp_data_entry_len, &al,
3762 s->ctx->cli_supp_data_records[i].arg);
3763 if (cb_retval == 0)
3764 {
3765 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3766 goto f_err;
3767 }
3768 }
3769 }
3770 p += supp_data_entry_len;
3771 }
3772 return 1;
3773 f_err:
3774 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3775 return -1;
3776 }
3777 #endif
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