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DTLS version usage fixes.
[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306 #endif
307 }
308 else
309 {
310 s->state=SSL3_ST_CR_CERT_A;
311 }
312 s->init_num=0;
313 break;
314 #ifndef OPENSSL_NO_TLSEXT
315 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
316 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
317 ret = tls1_get_server_supplemental_data(s);
318 if (ret <= 0) goto end;
319 s->state=SSL3_ST_CR_CERT_A;
320 s->init_num = 0;
321 break;
322 #endif
323 case SSL3_ST_CR_CERT_A:
324 case SSL3_ST_CR_CERT_B:
325 #ifndef OPENSSL_NO_TLSEXT
326 ret=ssl3_check_finished(s);
327 if (ret <= 0) goto end;
328 if (ret == 3)
329 {
330 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
331 s->init_num=0;
332 break;
333 }
334 if (ret == 2)
335 {
336 s->hit = 1;
337 if (s->tlsext_ticket_expected)
338 s->state=SSL3_ST_CR_SESSION_TICKET_A;
339 else
340 s->state=SSL3_ST_CR_FINISHED_A;
341 s->init_num=0;
342 break;
343 }
344 #endif
345 /* Check if it is anon DH/ECDH */
346 /* or PSK */
347 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
348 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
349 {
350 ret=ssl3_get_server_certificate(s);
351 if (ret <= 0) goto end;
352 #ifndef OPENSSL_NO_TLSEXT
353 if (s->tlsext_status_expected)
354 s->state=SSL3_ST_CR_CERT_STATUS_A;
355 else
356 s->state=SSL3_ST_CR_KEY_EXCH_A;
357 }
358 else
359 {
360 skip = 1;
361 s->state=SSL3_ST_CR_KEY_EXCH_A;
362 }
363 #else
364 }
365 else
366 skip=1;
367
368 s->state=SSL3_ST_CR_KEY_EXCH_A;
369 #endif
370 s->init_num=0;
371 break;
372
373 case SSL3_ST_CR_KEY_EXCH_A:
374 case SSL3_ST_CR_KEY_EXCH_B:
375 ret=ssl3_get_key_exchange(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_CERT_REQ_A;
378 s->init_num=0;
379
380 /* at this point we check that we have the
381 * required stuff from the server */
382 if (!ssl3_check_cert_and_algorithm(s))
383 {
384 ret= -1;
385 goto end;
386 }
387 break;
388
389 case SSL3_ST_CR_CERT_REQ_A:
390 case SSL3_ST_CR_CERT_REQ_B:
391 ret=ssl3_get_certificate_request(s);
392 if (ret <= 0) goto end;
393 s->state=SSL3_ST_CR_SRVR_DONE_A;
394 s->init_num=0;
395 break;
396
397 case SSL3_ST_CR_SRVR_DONE_A:
398 case SSL3_ST_CR_SRVR_DONE_B:
399 ret=ssl3_get_server_done(s);
400 if (ret <= 0) goto end;
401 #ifndef OPENSSL_NO_SRP
402 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
403 {
404 if ((ret = SRP_Calc_A_param(s))<=0)
405 {
406 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
407 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
408 goto end;
409 }
410 }
411 #endif
412 #ifndef OPENSSL_NO_TLSEXT
413 s->state=SSL3_ST_CW_SUPPLEMENTAL_DATA_A;
414 #else
415 if (s->s3->tmp.cert_req)
416 s->state=SSL3_ST_CW_CERT_A;
417 else
418 s->state=SSL3_ST_CW_KEY_EXCH_A;
419 #endif
420 s->init_num=0;
421
422 break;
423
424 case SSL3_ST_CW_CERT_A:
425 case SSL3_ST_CW_CERT_B:
426 case SSL3_ST_CW_CERT_C:
427 case SSL3_ST_CW_CERT_D:
428 ret=ssl3_send_client_certificate(s);
429 if (ret <= 0) goto end;
430 s->state=SSL3_ST_CW_KEY_EXCH_A;
431 s->init_num=0;
432 break;
433
434 case SSL3_ST_CW_KEY_EXCH_A:
435 case SSL3_ST_CW_KEY_EXCH_B:
436 ret=ssl3_send_client_key_exchange(s);
437 if (ret <= 0) goto end;
438 /* EAY EAY EAY need to check for DH fix cert
439 * sent back */
440 /* For TLS, cert_req is set to 2, so a cert chain
441 * of nothing is sent, but no verify packet is sent */
442 /* XXX: For now, we do not support client
443 * authentication in ECDH cipher suites with
444 * ECDH (rather than ECDSA) certificates.
445 * We need to skip the certificate verify
446 * message when client's ECDH public key is sent
447 * inside the client certificate.
448 */
449 if (s->s3->tmp.cert_req == 1)
450 {
451 s->state=SSL3_ST_CW_CERT_VRFY_A;
452 }
453 else
454 {
455 s->state=SSL3_ST_CW_CHANGE_A;
456 s->s3->change_cipher_spec=0;
457 }
458 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
459 {
460 s->state=SSL3_ST_CW_CHANGE_A;
461 s->s3->change_cipher_spec=0;
462 }
463
464 s->init_num=0;
465 break;
466
467 case SSL3_ST_CW_CERT_VRFY_A:
468 case SSL3_ST_CW_CERT_VRFY_B:
469 ret=ssl3_send_client_verify(s);
470 if (ret <= 0) goto end;
471 s->state=SSL3_ST_CW_CHANGE_A;
472 s->init_num=0;
473 s->s3->change_cipher_spec=0;
474 break;
475
476 case SSL3_ST_CW_CHANGE_A:
477 case SSL3_ST_CW_CHANGE_B:
478 ret=ssl3_send_change_cipher_spec(s,
479 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
480 if (ret <= 0) goto end;
481
482 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
483 s->state=SSL3_ST_CW_FINISHED_A;
484 #else
485 if (s->s3->next_proto_neg_seen)
486 s->state=SSL3_ST_CW_NEXT_PROTO_A;
487 else
488 s->state=SSL3_ST_CW_FINISHED_A;
489 #endif
490 s->init_num=0;
491
492 s->session->cipher=s->s3->tmp.new_cipher;
493 #ifdef OPENSSL_NO_COMP
494 s->session->compress_meth=0;
495 #else
496 if (s->s3->tmp.new_compression == NULL)
497 s->session->compress_meth=0;
498 else
499 s->session->compress_meth=
500 s->s3->tmp.new_compression->id;
501 #endif
502 if (!s->method->ssl3_enc->setup_key_block(s))
503 {
504 ret= -1;
505 goto end;
506 }
507
508 if (!s->method->ssl3_enc->change_cipher_state(s,
509 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
510 {
511 ret= -1;
512 goto end;
513 }
514
515 break;
516
517 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
518 case SSL3_ST_CW_NEXT_PROTO_A:
519 case SSL3_ST_CW_NEXT_PROTO_B:
520 ret=ssl3_send_next_proto(s);
521 if (ret <= 0) goto end;
522 s->state=SSL3_ST_CW_FINISHED_A;
523 break;
524 #endif
525
526 #ifndef OPENSSL_NO_TLSEXT
527 case SSL3_ST_CW_SUPPLEMENTAL_DATA_A:
528 case SSL3_ST_CW_SUPPLEMENTAL_DATA_B:
529 ret = tls1_send_client_supplemental_data(s, &skip);
530 if (ret <= 0) goto end;
531 if (s->s3->tmp.cert_req)
532 s->state=SSL3_ST_CW_CERT_A;
533 else
534 s->state=SSL3_ST_CW_KEY_EXCH_A;
535 s->init_num=0;
536 break;
537 #endif
538
539 case SSL3_ST_CW_FINISHED_A:
540 case SSL3_ST_CW_FINISHED_B:
541 ret=ssl3_send_finished(s,
542 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
543 s->method->ssl3_enc->client_finished_label,
544 s->method->ssl3_enc->client_finished_label_len);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CW_FLUSH;
547
548 /* clear flags */
549 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
550 if (s->hit)
551 {
552 s->s3->tmp.next_state=SSL_ST_OK;
553 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
554 {
555 s->state=SSL_ST_OK;
556 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
557 s->s3->delay_buf_pop_ret=0;
558 }
559 }
560 else
561 {
562 #ifndef OPENSSL_NO_TLSEXT
563 /* Allow NewSessionTicket if ticket expected */
564 if (s->tlsext_ticket_expected)
565 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
566 else
567 #endif
568
569 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
570 }
571 s->init_num=0;
572 break;
573
574 #ifndef OPENSSL_NO_TLSEXT
575 case SSL3_ST_CR_SESSION_TICKET_A:
576 case SSL3_ST_CR_SESSION_TICKET_B:
577 ret=ssl3_get_new_session_ticket(s);
578 if (ret <= 0) goto end;
579 s->state=SSL3_ST_CR_FINISHED_A;
580 s->init_num=0;
581 break;
582
583 case SSL3_ST_CR_CERT_STATUS_A:
584 case SSL3_ST_CR_CERT_STATUS_B:
585 ret=ssl3_get_cert_status(s);
586 if (ret <= 0) goto end;
587 s->state=SSL3_ST_CR_KEY_EXCH_A;
588 s->init_num=0;
589 break;
590 #endif
591
592 case SSL3_ST_CR_FINISHED_A:
593 case SSL3_ST_CR_FINISHED_B:
594
595 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
596 SSL3_ST_CR_FINISHED_B);
597 if (ret <= 0) goto end;
598
599 if (s->hit)
600 s->state=SSL3_ST_CW_CHANGE_A;
601 else
602 s->state=SSL_ST_OK;
603 s->init_num=0;
604 break;
605
606 case SSL3_ST_CW_FLUSH:
607 s->rwstate=SSL_WRITING;
608 if (BIO_flush(s->wbio) <= 0)
609 {
610 ret= -1;
611 goto end;
612 }
613 s->rwstate=SSL_NOTHING;
614 s->state=s->s3->tmp.next_state;
615 break;
616
617 case SSL_ST_OK:
618 /* clean a few things up */
619 ssl3_cleanup_key_block(s);
620
621 if (s->init_buf != NULL)
622 {
623 BUF_MEM_free(s->init_buf);
624 s->init_buf=NULL;
625 }
626
627 /* If we are not 'joining' the last two packets,
628 * remove the buffering now */
629 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
630 ssl_free_wbio_buffer(s);
631 /* else do it later in ssl3_write */
632
633 s->init_num=0;
634 s->renegotiate=0;
635 s->new_session=0;
636
637 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
638 if (s->hit) s->ctx->stats.sess_hit++;
639
640 ret=1;
641 /* s->server=0; */
642 s->handshake_func=ssl3_connect;
643 s->ctx->stats.sess_connect_good++;
644
645 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
646
647 goto end;
648 /* break; */
649
650 default:
651 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
652 ret= -1;
653 goto end;
654 /* break; */
655 }
656
657 /* did we do anything */
658 if (!s->s3->tmp.reuse_message && !skip)
659 {
660 if (s->debug)
661 {
662 if ((ret=BIO_flush(s->wbio)) <= 0)
663 goto end;
664 }
665
666 if ((cb != NULL) && (s->state != state))
667 {
668 new_state=s->state;
669 s->state=state;
670 cb(s,SSL_CB_CONNECT_LOOP,1);
671 s->state=new_state;
672 }
673 }
674 skip=0;
675 }
676 end:
677 s->in_handshake--;
678 if (buf != NULL)
679 BUF_MEM_free(buf);
680 if (cb != NULL)
681 cb(s,SSL_CB_CONNECT_EXIT,ret);
682 return(ret);
683 }
684
685
686 int ssl3_client_hello(SSL *s)
687 {
688 unsigned char *buf;
689 unsigned char *p,*d;
690 int i;
691 unsigned long Time,l;
692 #ifndef OPENSSL_NO_COMP
693 int j;
694 SSL_COMP *comp;
695 #endif
696
697 buf=(unsigned char *)s->init_buf->data;
698 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
699 {
700 SSL_SESSION *sess = s->session;
701 if ((sess == NULL) ||
702 (sess->ssl_version != s->version) ||
703 #ifdef OPENSSL_NO_TLSEXT
704 !sess->session_id_length ||
705 #else
706 (!sess->session_id_length && !sess->tlsext_tick) ||
707 #endif
708 (sess->not_resumable))
709 {
710 if (!ssl_get_new_session(s,0))
711 goto err;
712 }
713 if (s->method->version == DTLS_ANY_VERSION)
714 {
715 /* Determine which DTLS version to use */
716 int options = s->options;
717 /* If DTLS 1.2 disabled correct the version number */
718 if (options & SSL_OP_NO_DTLSv1_2)
719 {
720 if (tls1_suiteb(s))
721 {
722 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
723 goto err;
724 }
725 /* Disabling all versions is silly: return an
726 * error.
727 */
728 if (options & SSL_OP_NO_DTLSv1)
729 {
730 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
731 goto err;
732 }
733 /* Update method so we don't use any DTLS 1.2
734 * features.
735 */
736 s->method = DTLSv1_client_method();
737 s->version = DTLS1_VERSION;
738 }
739 else
740 {
741 /* We only support one version: update method */
742 if (options & SSL_OP_NO_DTLSv1)
743 s->method = DTLSv1_2_client_method();
744 s->version = DTLS1_2_VERSION;
745 }
746 s->client_version = s->version;
747 }
748 /* else use the pre-loaded session */
749
750 p=s->s3->client_random;
751
752 /* for DTLS if client_random is initialized, reuse it, we are
753 * required to use same upon reply to HelloVerify */
754 if (SSL_IS_DTLS(s))
755 {
756 size_t idx;
757 i = 1;
758 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
759 {
760 if (p[idx])
761 {
762 i = 0;
763 break;
764 }
765 }
766 }
767 else
768 i = 1;
769
770 if (i)
771 {
772 Time=(unsigned long)time(NULL); /* Time */
773 l2n(Time,p);
774 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
775
776 }
777
778 /* Do the message type and length last */
779 d=p= ssl_handshake_start(s);
780
781 /* version indicates the negotiated version: for example from
782 * an SSLv2/v3 compatible client hello). The client_version
783 * field is the maximum version we permit and it is also
784 * used in RSA encrypted premaster secrets. Some servers can
785 * choke if we initially report a higher version then
786 * renegotiate to a lower one in the premaster secret. This
787 * didn't happen with TLS 1.0 as most servers supported it
788 * but it can with TLS 1.1 or later if the server only supports
789 * 1.0.
790 *
791 * Possible scenario with previous logic:
792 * 1. Client hello indicates TLS 1.2
793 * 2. Server hello says TLS 1.0
794 * 3. RSA encrypted premaster secret uses 1.2.
795 * 4. Handhaked proceeds using TLS 1.0.
796 * 5. Server sends hello request to renegotiate.
797 * 6. Client hello indicates TLS v1.0 as we now
798 * know that is maximum server supports.
799 * 7. Server chokes on RSA encrypted premaster secret
800 * containing version 1.0.
801 *
802 * For interoperability it should be OK to always use the
803 * maximum version we support in client hello and then rely
804 * on the checking of version to ensure the servers isn't
805 * being inconsistent: for example initially negotiating with
806 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
807 * client_version in client hello and not resetting it to
808 * the negotiated version.
809 */
810 #if 0
811 *(p++)=s->version>>8;
812 *(p++)=s->version&0xff;
813 s->client_version=s->version;
814 #else
815 *(p++)=s->client_version>>8;
816 *(p++)=s->client_version&0xff;
817 #endif
818
819 /* Random stuff */
820 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
821 p+=SSL3_RANDOM_SIZE;
822
823 /* Session ID */
824 if (s->new_session)
825 i=0;
826 else
827 i=s->session->session_id_length;
828 *(p++)=i;
829 if (i != 0)
830 {
831 if (i > (int)sizeof(s->session->session_id))
832 {
833 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
834 goto err;
835 }
836 memcpy(p,s->session->session_id,i);
837 p+=i;
838 }
839
840 /* cookie stuff for DTLS */
841 if (SSL_IS_DTLS(s))
842 {
843 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
844 {
845 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
846 goto err;
847 }
848 *(p++) = s->d1->cookie_len;
849 memcpy(p, s->d1->cookie, s->d1->cookie_len);
850 p += s->d1->cookie_len;
851 }
852
853 /* Ciphers supported */
854 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
855 if (i == 0)
856 {
857 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
858 goto err;
859 }
860 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
861 /* Some servers hang if client hello > 256 bytes
862 * as hack workaround chop number of supported ciphers
863 * to keep it well below this if we use TLS v1.2
864 */
865 if (TLS1_get_version(s) >= TLS1_2_VERSION
866 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
867 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
868 #endif
869 s2n(i,p);
870 p+=i;
871
872 /* COMPRESSION */
873 #ifdef OPENSSL_NO_COMP
874 *(p++)=1;
875 #else
876
877 if ((s->options & SSL_OP_NO_COMPRESSION)
878 || !s->ctx->comp_methods)
879 j=0;
880 else
881 j=sk_SSL_COMP_num(s->ctx->comp_methods);
882 *(p++)=1+j;
883 for (i=0; i<j; i++)
884 {
885 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
886 *(p++)=comp->id;
887 }
888 #endif
889 *(p++)=0; /* Add the NULL method */
890
891 #ifndef OPENSSL_NO_TLSEXT
892 /* TLS extensions*/
893 if (ssl_prepare_clienthello_tlsext(s) <= 0)
894 {
895 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
896 goto err;
897 }
898 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
899 {
900 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
901 goto err;
902 }
903 #endif
904
905 l= p-d;
906 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
907 s->state=SSL3_ST_CW_CLNT_HELLO_B;
908 }
909
910 /* SSL3_ST_CW_CLNT_HELLO_B */
911 return ssl_do_write(s);
912 err:
913 return(-1);
914 }
915
916 int ssl3_get_server_hello(SSL *s)
917 {
918 STACK_OF(SSL_CIPHER) *sk;
919 const SSL_CIPHER *c;
920 CERT *ct = s->cert;
921 unsigned char *p,*d;
922 int i,al=SSL_AD_INTERNAL_ERROR,ok;
923 unsigned int j;
924 long n;
925 #ifndef OPENSSL_NO_COMP
926 SSL_COMP *comp;
927 #endif
928 /* Hello verify request and/or server hello version may not
929 * match so set first packet if we're negotiating version.
930 */
931 if (SSL_IS_DTLS(s))
932 s->first_packet = 1;
933
934 n=s->method->ssl_get_message(s,
935 SSL3_ST_CR_SRVR_HELLO_A,
936 SSL3_ST_CR_SRVR_HELLO_B,
937 -1,
938 20000, /* ?? */
939 &ok);
940
941 if (!ok) return((int)n);
942
943 if (SSL_IS_DTLS(s))
944 {
945 s->first_packet = 0;
946 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
947 {
948 if ( s->d1->send_cookie == 0)
949 {
950 s->s3->tmp.reuse_message = 1;
951 return 1;
952 }
953 else /* already sent a cookie */
954 {
955 al=SSL_AD_UNEXPECTED_MESSAGE;
956 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
957 goto f_err;
958 }
959 }
960 }
961
962 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
963 {
964 al=SSL_AD_UNEXPECTED_MESSAGE;
965 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
966 goto f_err;
967 }
968
969 d=p=(unsigned char *)s->init_msg;
970 if (s->method->version == DTLS_ANY_VERSION)
971 {
972 /* Work out correct protocol version to use */
973 int hversion = (p[0] << 8)|p[1];
974 int options = s->options;
975 if (hversion == DTLS1_2_VERSION
976 && !(options & SSL_OP_NO_DTLSv1_2))
977 s->method = DTLSv1_2_client_method();
978 else if (tls1_suiteb(s))
979 {
980 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
981 s->version = hversion;
982 al = SSL_AD_PROTOCOL_VERSION;
983 goto f_err;
984 }
985 else if (hversion == DTLS1_VERSION
986 && !(options & SSL_OP_NO_DTLSv1))
987 s->method = DTLSv1_client_method();
988 else
989 {
990 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
991 s->version = hversion;
992 al = SSL_AD_PROTOCOL_VERSION;
993 goto f_err;
994 }
995 s->version = s->client_version = s->method->version;
996 }
997
998 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
999 {
1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
1001 s->version=(s->version&0xff00)|p[1];
1002 al=SSL_AD_PROTOCOL_VERSION;
1003 goto f_err;
1004 }
1005 p+=2;
1006
1007 /* load the server hello data */
1008 /* load the server random */
1009 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
1010 p+=SSL3_RANDOM_SIZE;
1011
1012 /* get the session-id */
1013 j= *(p++);
1014
1015 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1016 {
1017 al=SSL_AD_ILLEGAL_PARAMETER;
1018 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1019 goto f_err;
1020 }
1021
1022 #ifndef OPENSSL_NO_TLSEXT
1023 /* check if we want to resume the session based on external pre-shared secret */
1024 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1025 {
1026 SSL_CIPHER *pref_cipher=NULL;
1027 s->session->master_key_length=sizeof(s->session->master_key);
1028 if (s->tls_session_secret_cb(s, s->session->master_key,
1029 &s->session->master_key_length,
1030 NULL, &pref_cipher,
1031 s->tls_session_secret_cb_arg))
1032 {
1033 s->session->cipher = pref_cipher ?
1034 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1035 }
1036 }
1037 #endif /* OPENSSL_NO_TLSEXT */
1038
1039 if (j != 0 && j == s->session->session_id_length
1040 && memcmp(p,s->session->session_id,j) == 0)
1041 {
1042 if(s->sid_ctx_length != s->session->sid_ctx_length
1043 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1044 {
1045 /* actually a client application bug */
1046 al=SSL_AD_ILLEGAL_PARAMETER;
1047 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1048 goto f_err;
1049 }
1050 s->hit=1;
1051 }
1052 else /* a miss or crap from the other end */
1053 {
1054 /* If we were trying for session-id reuse, make a new
1055 * SSL_SESSION so we don't stuff up other people */
1056 s->hit=0;
1057 if (s->session->session_id_length > 0)
1058 {
1059 if (!ssl_get_new_session(s,0))
1060 {
1061 goto f_err;
1062 }
1063 }
1064 s->session->session_id_length=j;
1065 memcpy(s->session->session_id,p,j); /* j could be 0 */
1066 }
1067 p+=j;
1068 c=ssl_get_cipher_by_char(s,p);
1069 if (c == NULL)
1070 {
1071 /* unknown cipher */
1072 al=SSL_AD_ILLEGAL_PARAMETER;
1073 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1074 goto f_err;
1075 }
1076 /* Set version disabled mask now we know version */
1077 if (!SSL_USE_TLS1_2_CIPHERS(s))
1078 ct->mask_ssl = SSL_TLSV1_2;
1079 else
1080 ct->mask_ssl = 0;
1081 /* If it is a disabled cipher we didn't send it in client hello,
1082 * so return an error.
1083 */
1084 if (c->algorithm_ssl & ct->mask_ssl ||
1085 c->algorithm_mkey & ct->mask_k ||
1086 c->algorithm_auth & ct->mask_a)
1087 {
1088 al=SSL_AD_ILLEGAL_PARAMETER;
1089 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1090 goto f_err;
1091 }
1092 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1093
1094 sk=ssl_get_ciphers_by_id(s);
1095 i=sk_SSL_CIPHER_find(sk,c);
1096 if (i < 0)
1097 {
1098 /* we did not say we would use this cipher */
1099 al=SSL_AD_ILLEGAL_PARAMETER;
1100 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1101 goto f_err;
1102 }
1103
1104 /* Depending on the session caching (internal/external), the cipher
1105 and/or cipher_id values may not be set. Make sure that
1106 cipher_id is set and use it for comparison. */
1107 if (s->session->cipher)
1108 s->session->cipher_id = s->session->cipher->id;
1109 if (s->hit && (s->session->cipher_id != c->id))
1110 {
1111 /* Workaround is now obsolete */
1112 #if 0
1113 if (!(s->options &
1114 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1115 #endif
1116 {
1117 al=SSL_AD_ILLEGAL_PARAMETER;
1118 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1119 goto f_err;
1120 }
1121 }
1122 s->s3->tmp.new_cipher=c;
1123 /* Don't digest cached records if no sigalgs: we may need them for
1124 * client authentication.
1125 */
1126 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1127 goto f_err;
1128 /* lets get the compression algorithm */
1129 /* COMPRESSION */
1130 #ifdef OPENSSL_NO_COMP
1131 if (*(p++) != 0)
1132 {
1133 al=SSL_AD_ILLEGAL_PARAMETER;
1134 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1135 goto f_err;
1136 }
1137 /* If compression is disabled we'd better not try to resume a session
1138 * using compression.
1139 */
1140 if (s->session->compress_meth != 0)
1141 {
1142 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1143 goto f_err;
1144 }
1145 #else
1146 j= *(p++);
1147 if (s->hit && j != s->session->compress_meth)
1148 {
1149 al=SSL_AD_ILLEGAL_PARAMETER;
1150 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1151 goto f_err;
1152 }
1153 if (j == 0)
1154 comp=NULL;
1155 else if (s->options & SSL_OP_NO_COMPRESSION)
1156 {
1157 al=SSL_AD_ILLEGAL_PARAMETER;
1158 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1159 goto f_err;
1160 }
1161 else
1162 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1163
1164 if ((j != 0) && (comp == NULL))
1165 {
1166 al=SSL_AD_ILLEGAL_PARAMETER;
1167 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1168 goto f_err;
1169 }
1170 else
1171 {
1172 s->s3->tmp.new_compression=comp;
1173 }
1174 #endif
1175
1176 #ifndef OPENSSL_NO_TLSEXT
1177 /* TLS extensions*/
1178 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1179 {
1180 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1181 goto err;
1182 }
1183 #endif
1184
1185 if (p != (d+n))
1186 {
1187 /* wrong packet length */
1188 al=SSL_AD_DECODE_ERROR;
1189 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1190 goto f_err;
1191 }
1192
1193 return(1);
1194 f_err:
1195 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1196 err:
1197 return(-1);
1198 }
1199
1200 int ssl3_get_server_certificate(SSL *s)
1201 {
1202 int al,i,ok,ret= -1;
1203 unsigned long n,nc,llen,l;
1204 X509 *x=NULL;
1205 const unsigned char *q,*p;
1206 unsigned char *d;
1207 STACK_OF(X509) *sk=NULL;
1208 SESS_CERT *sc;
1209 EVP_PKEY *pkey=NULL;
1210 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1211
1212 n=s->method->ssl_get_message(s,
1213 SSL3_ST_CR_CERT_A,
1214 SSL3_ST_CR_CERT_B,
1215 -1,
1216 s->max_cert_list,
1217 &ok);
1218
1219 if (!ok) return((int)n);
1220
1221 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1222 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1223 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1224 {
1225 s->s3->tmp.reuse_message=1;
1226 return(1);
1227 }
1228
1229 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1230 {
1231 al=SSL_AD_UNEXPECTED_MESSAGE;
1232 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1233 goto f_err;
1234 }
1235 p=d=(unsigned char *)s->init_msg;
1236
1237 if ((sk=sk_X509_new_null()) == NULL)
1238 {
1239 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1240 goto err;
1241 }
1242
1243 n2l3(p,llen);
1244 if (llen+3 != n)
1245 {
1246 al=SSL_AD_DECODE_ERROR;
1247 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1248 goto f_err;
1249 }
1250 for (nc=0; nc<llen; )
1251 {
1252 n2l3(p,l);
1253 if ((l+nc+3) > llen)
1254 {
1255 al=SSL_AD_DECODE_ERROR;
1256 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1257 goto f_err;
1258 }
1259
1260 q=p;
1261 x=d2i_X509(NULL,&q,l);
1262 if (x == NULL)
1263 {
1264 al=SSL_AD_BAD_CERTIFICATE;
1265 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1266 goto f_err;
1267 }
1268 if (q != (p+l))
1269 {
1270 al=SSL_AD_DECODE_ERROR;
1271 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1272 goto f_err;
1273 }
1274 if (!sk_X509_push(sk,x))
1275 {
1276 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1277 goto err;
1278 }
1279 x=NULL;
1280 nc+=l+3;
1281 p=q;
1282 }
1283
1284 i=ssl_verify_cert_chain(s,sk);
1285 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1286 #ifndef OPENSSL_NO_KRB5
1287 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1288 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1289 #endif /* OPENSSL_NO_KRB5 */
1290 )
1291 {
1292 al=ssl_verify_alarm_type(s->verify_result);
1293 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1294 goto f_err;
1295 }
1296 ERR_clear_error(); /* but we keep s->verify_result */
1297
1298 sc=ssl_sess_cert_new();
1299 if (sc == NULL) goto err;
1300
1301 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1302 s->session->sess_cert=sc;
1303
1304 sc->cert_chain=sk;
1305 /* Inconsistency alert: cert_chain does include the peer's
1306 * certificate, which we don't include in s3_srvr.c */
1307 x=sk_X509_value(sk,0);
1308 sk=NULL;
1309 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1310
1311 pkey=X509_get_pubkey(x);
1312
1313 /* VRS: allow null cert if auth == KRB5 */
1314 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1315 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1316 ? 0 : 1;
1317
1318 #ifdef KSSL_DEBUG
1319 printf("pkey,x = %p, %p\n", pkey,x);
1320 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1321 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1322 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1323 #endif /* KSSL_DEBUG */
1324
1325 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1326 {
1327 x=NULL;
1328 al=SSL3_AL_FATAL;
1329 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1330 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1331 goto f_err;
1332 }
1333
1334 i=ssl_cert_type(x,pkey);
1335 if (need_cert && i < 0)
1336 {
1337 x=NULL;
1338 al=SSL3_AL_FATAL;
1339 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1340 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1341 goto f_err;
1342 }
1343
1344 if (need_cert)
1345 {
1346 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1347 if (exp_idx >= 0 && i != exp_idx)
1348 {
1349 x=NULL;
1350 al=SSL_AD_ILLEGAL_PARAMETER;
1351 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1352 SSL_R_WRONG_CERTIFICATE_TYPE);
1353 goto f_err;
1354 }
1355 sc->peer_cert_type=i;
1356 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1357 /* Why would the following ever happen?
1358 * We just created sc a couple of lines ago. */
1359 if (sc->peer_pkeys[i].x509 != NULL)
1360 X509_free(sc->peer_pkeys[i].x509);
1361 sc->peer_pkeys[i].x509=x;
1362 sc->peer_key= &(sc->peer_pkeys[i]);
1363
1364 if (s->session->peer != NULL)
1365 X509_free(s->session->peer);
1366 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1367 s->session->peer=x;
1368 }
1369 else
1370 {
1371 sc->peer_cert_type=i;
1372 sc->peer_key= NULL;
1373
1374 if (s->session->peer != NULL)
1375 X509_free(s->session->peer);
1376 s->session->peer=NULL;
1377 }
1378 s->session->verify_result = s->verify_result;
1379
1380 x=NULL;
1381 ret=1;
1382 if (0)
1383 {
1384 f_err:
1385 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1386 }
1387 err:
1388 EVP_PKEY_free(pkey);
1389 X509_free(x);
1390 sk_X509_pop_free(sk,X509_free);
1391 return(ret);
1392 }
1393
1394 int ssl3_get_key_exchange(SSL *s)
1395 {
1396 #ifndef OPENSSL_NO_RSA
1397 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1398 #endif
1399 EVP_MD_CTX md_ctx;
1400 unsigned char *param,*p;
1401 int al,i,j,param_len,ok;
1402 long n,alg_k,alg_a;
1403 EVP_PKEY *pkey=NULL;
1404 const EVP_MD *md = NULL;
1405 #ifndef OPENSSL_NO_RSA
1406 RSA *rsa=NULL;
1407 #endif
1408 #ifndef OPENSSL_NO_DH
1409 DH *dh=NULL;
1410 #endif
1411 #ifndef OPENSSL_NO_ECDH
1412 EC_KEY *ecdh = NULL;
1413 BN_CTX *bn_ctx = NULL;
1414 EC_POINT *srvr_ecpoint = NULL;
1415 int curve_nid = 0;
1416 int encoded_pt_len = 0;
1417 #endif
1418
1419 /* use same message size as in ssl3_get_certificate_request()
1420 * as ServerKeyExchange message may be skipped */
1421 n=s->method->ssl_get_message(s,
1422 SSL3_ST_CR_KEY_EXCH_A,
1423 SSL3_ST_CR_KEY_EXCH_B,
1424 -1,
1425 s->max_cert_list,
1426 &ok);
1427 if (!ok) return((int)n);
1428
1429 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1430 {
1431 #ifndef OPENSSL_NO_PSK
1432 /* In plain PSK ciphersuite, ServerKeyExchange can be
1433 omitted if no identity hint is sent. Set
1434 session->sess_cert anyway to avoid problems
1435 later.*/
1436 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1437 {
1438 s->session->sess_cert=ssl_sess_cert_new();
1439 if (s->ctx->psk_identity_hint)
1440 OPENSSL_free(s->ctx->psk_identity_hint);
1441 s->ctx->psk_identity_hint = NULL;
1442 }
1443 #endif
1444 s->s3->tmp.reuse_message=1;
1445 return(1);
1446 }
1447
1448 param=p=(unsigned char *)s->init_msg;
1449 if (s->session->sess_cert != NULL)
1450 {
1451 #ifndef OPENSSL_NO_RSA
1452 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1453 {
1454 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1455 s->session->sess_cert->peer_rsa_tmp=NULL;
1456 }
1457 #endif
1458 #ifndef OPENSSL_NO_DH
1459 if (s->session->sess_cert->peer_dh_tmp)
1460 {
1461 DH_free(s->session->sess_cert->peer_dh_tmp);
1462 s->session->sess_cert->peer_dh_tmp=NULL;
1463 }
1464 #endif
1465 #ifndef OPENSSL_NO_ECDH
1466 if (s->session->sess_cert->peer_ecdh_tmp)
1467 {
1468 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1469 s->session->sess_cert->peer_ecdh_tmp=NULL;
1470 }
1471 #endif
1472 }
1473 else
1474 {
1475 s->session->sess_cert=ssl_sess_cert_new();
1476 }
1477
1478 param_len=0;
1479 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1480 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1481 EVP_MD_CTX_init(&md_ctx);
1482
1483 #ifndef OPENSSL_NO_PSK
1484 if (alg_k & SSL_kPSK)
1485 {
1486 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1487
1488 al=SSL_AD_HANDSHAKE_FAILURE;
1489 n2s(p,i);
1490 param_len=i+2;
1491 /* Store PSK identity hint for later use, hint is used
1492 * in ssl3_send_client_key_exchange. Assume that the
1493 * maximum length of a PSK identity hint can be as
1494 * long as the maximum length of a PSK identity. */
1495 if (i > PSK_MAX_IDENTITY_LEN)
1496 {
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1498 SSL_R_DATA_LENGTH_TOO_LONG);
1499 goto f_err;
1500 }
1501 if (param_len > n)
1502 {
1503 al=SSL_AD_DECODE_ERROR;
1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1505 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1506 goto f_err;
1507 }
1508 /* If received PSK identity hint contains NULL
1509 * characters, the hint is truncated from the first
1510 * NULL. p may not be ending with NULL, so create a
1511 * NULL-terminated string. */
1512 memcpy(tmp_id_hint, p, i);
1513 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1514 if (s->ctx->psk_identity_hint != NULL)
1515 OPENSSL_free(s->ctx->psk_identity_hint);
1516 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1517 if (s->ctx->psk_identity_hint == NULL)
1518 {
1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1520 goto f_err;
1521 }
1522
1523 p+=i;
1524 n-=param_len;
1525 }
1526 else
1527 #endif /* !OPENSSL_NO_PSK */
1528 #ifndef OPENSSL_NO_SRP
1529 if (alg_k & SSL_kSRP)
1530 {
1531 n2s(p,i);
1532 param_len=i+2;
1533 if (param_len > n)
1534 {
1535 al=SSL_AD_DECODE_ERROR;
1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1537 goto f_err;
1538 }
1539 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1540 {
1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1542 goto err;
1543 }
1544 p+=i;
1545
1546 n2s(p,i);
1547 param_len+=i+2;
1548 if (param_len > n)
1549 {
1550 al=SSL_AD_DECODE_ERROR;
1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1552 goto f_err;
1553 }
1554 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1555 {
1556 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1557 goto err;
1558 }
1559 p+=i;
1560
1561 i = (unsigned int)(p[0]);
1562 p++;
1563 param_len+=i+1;
1564 if (param_len > n)
1565 {
1566 al=SSL_AD_DECODE_ERROR;
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1568 goto f_err;
1569 }
1570 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1571 {
1572 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1573 goto err;
1574 }
1575 p+=i;
1576
1577 n2s(p,i);
1578 param_len+=i+2;
1579 if (param_len > n)
1580 {
1581 al=SSL_AD_DECODE_ERROR;
1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1583 goto f_err;
1584 }
1585 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1586 {
1587 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1588 goto err;
1589 }
1590 p+=i;
1591 n-=param_len;
1592
1593 /* We must check if there is a certificate */
1594 #ifndef OPENSSL_NO_RSA
1595 if (alg_a & SSL_aRSA)
1596 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1597 #else
1598 if (0)
1599 ;
1600 #endif
1601 #ifndef OPENSSL_NO_DSA
1602 else if (alg_a & SSL_aDSS)
1603 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1604 #endif
1605 }
1606 else
1607 #endif /* !OPENSSL_NO_SRP */
1608 #ifndef OPENSSL_NO_RSA
1609 if (alg_k & SSL_kRSA)
1610 {
1611 if ((rsa=RSA_new()) == NULL)
1612 {
1613 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1614 goto err;
1615 }
1616 n2s(p,i);
1617 param_len=i+2;
1618 if (param_len > n)
1619 {
1620 al=SSL_AD_DECODE_ERROR;
1621 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1622 goto f_err;
1623 }
1624 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1625 {
1626 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1627 goto err;
1628 }
1629 p+=i;
1630
1631 n2s(p,i);
1632 param_len+=i+2;
1633 if (param_len > n)
1634 {
1635 al=SSL_AD_DECODE_ERROR;
1636 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1637 goto f_err;
1638 }
1639 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1640 {
1641 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1642 goto err;
1643 }
1644 p+=i;
1645 n-=param_len;
1646
1647 /* this should be because we are using an export cipher */
1648 if (alg_a & SSL_aRSA)
1649 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1650 else
1651 {
1652 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1653 goto err;
1654 }
1655 s->session->sess_cert->peer_rsa_tmp=rsa;
1656 rsa=NULL;
1657 }
1658 #else /* OPENSSL_NO_RSA */
1659 if (0)
1660 ;
1661 #endif
1662 #ifndef OPENSSL_NO_DH
1663 else if (alg_k & SSL_kEDH)
1664 {
1665 if ((dh=DH_new()) == NULL)
1666 {
1667 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1668 goto err;
1669 }
1670 n2s(p,i);
1671 param_len=i+2;
1672 if (param_len > n)
1673 {
1674 al=SSL_AD_DECODE_ERROR;
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1676 goto f_err;
1677 }
1678 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1679 {
1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1681 goto err;
1682 }
1683 p+=i;
1684
1685 n2s(p,i);
1686 param_len+=i+2;
1687 if (param_len > n)
1688 {
1689 al=SSL_AD_DECODE_ERROR;
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1691 goto f_err;
1692 }
1693 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1694 {
1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1696 goto err;
1697 }
1698 p+=i;
1699
1700 n2s(p,i);
1701 param_len+=i+2;
1702 if (param_len > n)
1703 {
1704 al=SSL_AD_DECODE_ERROR;
1705 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1706 goto f_err;
1707 }
1708 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1709 {
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1711 goto err;
1712 }
1713 p+=i;
1714 n-=param_len;
1715
1716 #ifndef OPENSSL_NO_RSA
1717 if (alg_a & SSL_aRSA)
1718 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1719 #else
1720 if (0)
1721 ;
1722 #endif
1723 #ifndef OPENSSL_NO_DSA
1724 else if (alg_a & SSL_aDSS)
1725 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1726 #endif
1727 /* else anonymous DH, so no certificate or pkey. */
1728
1729 s->session->sess_cert->peer_dh_tmp=dh;
1730 dh=NULL;
1731 }
1732 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1733 {
1734 al=SSL_AD_ILLEGAL_PARAMETER;
1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1736 goto f_err;
1737 }
1738 #endif /* !OPENSSL_NO_DH */
1739
1740 #ifndef OPENSSL_NO_ECDH
1741 else if (alg_k & SSL_kEECDH)
1742 {
1743 EC_GROUP *ngroup;
1744 const EC_GROUP *group;
1745
1746 if ((ecdh=EC_KEY_new()) == NULL)
1747 {
1748 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1749 goto err;
1750 }
1751
1752 /* Extract elliptic curve parameters and the
1753 * server's ephemeral ECDH public key.
1754 * Keep accumulating lengths of various components in
1755 * param_len and make sure it never exceeds n.
1756 */
1757
1758 /* XXX: For now we only support named (not generic) curves
1759 * and the ECParameters in this case is just three bytes.
1760 */
1761 param_len=3;
1762 /* Check curve is one of our preferences, if not server has
1763 * sent an invalid curve.
1764 */
1765 if (!tls1_check_curve(s, p, param_len))
1766 {
1767 al=SSL_AD_DECODE_ERROR;
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1769 goto f_err;
1770 }
1771
1772 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1773 {
1774 al=SSL_AD_INTERNAL_ERROR;
1775 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1776 goto f_err;
1777 }
1778
1779 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1780 if (ngroup == NULL)
1781 {
1782 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1783 goto err;
1784 }
1785 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1786 {
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1788 goto err;
1789 }
1790 EC_GROUP_free(ngroup);
1791
1792 group = EC_KEY_get0_group(ecdh);
1793
1794 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1795 (EC_GROUP_get_degree(group) > 163))
1796 {
1797 al=SSL_AD_EXPORT_RESTRICTION;
1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1799 goto f_err;
1800 }
1801
1802 p+=3;
1803
1804 /* Next, get the encoded ECPoint */
1805 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1806 ((bn_ctx = BN_CTX_new()) == NULL))
1807 {
1808 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1809 goto err;
1810 }
1811
1812 encoded_pt_len = *p; /* length of encoded point */
1813 p+=1;
1814 param_len += (1 + encoded_pt_len);
1815 if ((param_len > n) ||
1816 (EC_POINT_oct2point(group, srvr_ecpoint,
1817 p, encoded_pt_len, bn_ctx) == 0))
1818 {
1819 al=SSL_AD_DECODE_ERROR;
1820 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1821 goto f_err;
1822 }
1823
1824 n-=param_len;
1825 p+=encoded_pt_len;
1826
1827 /* The ECC/TLS specification does not mention
1828 * the use of DSA to sign ECParameters in the server
1829 * key exchange message. We do support RSA and ECDSA.
1830 */
1831 if (0) ;
1832 #ifndef OPENSSL_NO_RSA
1833 else if (alg_a & SSL_aRSA)
1834 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1835 #endif
1836 #ifndef OPENSSL_NO_ECDSA
1837 else if (alg_a & SSL_aECDSA)
1838 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1839 #endif
1840 /* else anonymous ECDH, so no certificate or pkey. */
1841 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1842 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1843 ecdh=NULL;
1844 BN_CTX_free(bn_ctx);
1845 bn_ctx = NULL;
1846 EC_POINT_free(srvr_ecpoint);
1847 srvr_ecpoint = NULL;
1848 }
1849 else if (alg_k)
1850 {
1851 al=SSL_AD_UNEXPECTED_MESSAGE;
1852 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1853 goto f_err;
1854 }
1855 #endif /* !OPENSSL_NO_ECDH */
1856
1857
1858 /* p points to the next byte, there are 'n' bytes left */
1859
1860 /* if it was signed, check the signature */
1861 if (pkey != NULL)
1862 {
1863 if (SSL_USE_SIGALGS(s))
1864 {
1865 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1866 if (rv == -1)
1867 goto err;
1868 else if (rv == 0)
1869 {
1870 al = SSL_AD_DECODE_ERROR;
1871 goto f_err;
1872 }
1873 #ifdef SSL_DEBUG
1874 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1875 #endif
1876 p += 2;
1877 n -= 2;
1878 }
1879 else
1880 md = EVP_sha1();
1881
1882 n2s(p,i);
1883 n-=2;
1884 j=EVP_PKEY_size(pkey);
1885
1886 if ((i != n) || (n > j) || (n <= 0))
1887 {
1888 /* wrong packet length */
1889 al=SSL_AD_DECODE_ERROR;
1890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1891 goto f_err;
1892 }
1893
1894 #ifndef OPENSSL_NO_RSA
1895 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1896 {
1897 int num;
1898
1899 j=0;
1900 q=md_buf;
1901 for (num=2; num > 0; num--)
1902 {
1903 EVP_MD_CTX_set_flags(&md_ctx,
1904 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1905 EVP_DigestInit_ex(&md_ctx,(num == 2)
1906 ?s->ctx->md5:s->ctx->sha1, NULL);
1907 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1908 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1909 EVP_DigestUpdate(&md_ctx,param,param_len);
1910 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1911 q+=i;
1912 j+=i;
1913 }
1914 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1915 pkey->pkey.rsa);
1916 if (i < 0)
1917 {
1918 al=SSL_AD_DECRYPT_ERROR;
1919 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1920 goto f_err;
1921 }
1922 if (i == 0)
1923 {
1924 /* bad signature */
1925 al=SSL_AD_DECRYPT_ERROR;
1926 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1927 goto f_err;
1928 }
1929 }
1930 else
1931 #endif
1932 {
1933 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1934 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1935 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1936 EVP_VerifyUpdate(&md_ctx,param,param_len);
1937 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1938 {
1939 /* bad signature */
1940 al=SSL_AD_DECRYPT_ERROR;
1941 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1942 goto f_err;
1943 }
1944 }
1945 }
1946 else
1947 {
1948 /* aNULL or kPSK do not need public keys */
1949 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1950 {
1951 /* Might be wrong key type, check it */
1952 if (ssl3_check_cert_and_algorithm(s))
1953 /* Otherwise this shouldn't happen */
1954 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1955 goto err;
1956 }
1957 /* still data left over */
1958 if (n != 0)
1959 {
1960 al=SSL_AD_DECODE_ERROR;
1961 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1962 goto f_err;
1963 }
1964 }
1965 EVP_PKEY_free(pkey);
1966 EVP_MD_CTX_cleanup(&md_ctx);
1967 return(1);
1968 f_err:
1969 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1970 err:
1971 EVP_PKEY_free(pkey);
1972 #ifndef OPENSSL_NO_RSA
1973 if (rsa != NULL)
1974 RSA_free(rsa);
1975 #endif
1976 #ifndef OPENSSL_NO_DH
1977 if (dh != NULL)
1978 DH_free(dh);
1979 #endif
1980 #ifndef OPENSSL_NO_ECDH
1981 BN_CTX_free(bn_ctx);
1982 EC_POINT_free(srvr_ecpoint);
1983 if (ecdh != NULL)
1984 EC_KEY_free(ecdh);
1985 #endif
1986 EVP_MD_CTX_cleanup(&md_ctx);
1987 return(-1);
1988 }
1989
1990 int ssl3_get_certificate_request(SSL *s)
1991 {
1992 int ok,ret=0;
1993 unsigned long n,nc,l;
1994 unsigned int llen, ctype_num,i;
1995 X509_NAME *xn=NULL;
1996 const unsigned char *p,*q;
1997 unsigned char *d;
1998 STACK_OF(X509_NAME) *ca_sk=NULL;
1999
2000 n=s->method->ssl_get_message(s,
2001 SSL3_ST_CR_CERT_REQ_A,
2002 SSL3_ST_CR_CERT_REQ_B,
2003 -1,
2004 s->max_cert_list,
2005 &ok);
2006
2007 if (!ok) return((int)n);
2008
2009 s->s3->tmp.cert_req=0;
2010
2011 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2012 {
2013 s->s3->tmp.reuse_message=1;
2014 /* If we get here we don't need any cached handshake records
2015 * as we wont be doing client auth.
2016 */
2017 if (s->s3->handshake_buffer)
2018 {
2019 if (!ssl3_digest_cached_records(s))
2020 goto err;
2021 }
2022 return(1);
2023 }
2024
2025 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2026 {
2027 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2028 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2029 goto err;
2030 }
2031
2032 /* TLS does not like anon-DH with client cert */
2033 if (s->version > SSL3_VERSION)
2034 {
2035 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2036 {
2037 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2038 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2039 goto err;
2040 }
2041 }
2042
2043 p=d=(unsigned char *)s->init_msg;
2044
2045 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2046 {
2047 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2048 goto err;
2049 }
2050
2051 /* get the certificate types */
2052 ctype_num= *(p++);
2053 if (s->cert->ctypes)
2054 {
2055 OPENSSL_free(s->cert->ctypes);
2056 s->cert->ctypes = NULL;
2057 }
2058 if (ctype_num > SSL3_CT_NUMBER)
2059 {
2060 /* If we exceed static buffer copy all to cert structure */
2061 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2062 memcpy(s->cert->ctypes, p, ctype_num);
2063 s->cert->ctype_num = (size_t)ctype_num;
2064 ctype_num=SSL3_CT_NUMBER;
2065 }
2066 for (i=0; i<ctype_num; i++)
2067 s->s3->tmp.ctype[i]= p[i];
2068 p+=p[-1];
2069 if (SSL_USE_SIGALGS(s))
2070 {
2071 n2s(p, llen);
2072 /* Check we have enough room for signature algorithms and
2073 * following length value.
2074 */
2075 if ((unsigned long)(p - d + llen + 2) > n)
2076 {
2077 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2078 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2079 goto err;
2080 }
2081 /* Clear certificate digests and validity flags */
2082 for (i = 0; i < SSL_PKEY_NUM; i++)
2083 {
2084 s->cert->pkeys[i].digest = NULL;
2085 s->cert->pkeys[i].valid_flags = 0;
2086 }
2087 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2088 {
2089 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2090 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2091 goto err;
2092 }
2093 p += llen;
2094 }
2095
2096 /* get the CA RDNs */
2097 n2s(p,llen);
2098 #if 0
2099 {
2100 FILE *out;
2101 out=fopen("/tmp/vsign.der","w");
2102 fwrite(p,1,llen,out);
2103 fclose(out);
2104 }
2105 #endif
2106
2107 if ((unsigned long)(p - d + llen) != n)
2108 {
2109 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2110 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2111 goto err;
2112 }
2113
2114 for (nc=0; nc<llen; )
2115 {
2116 n2s(p,l);
2117 if ((l+nc+2) > llen)
2118 {
2119 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2120 goto cont; /* netscape bugs */
2121 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2122 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2123 goto err;
2124 }
2125
2126 q=p;
2127
2128 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2129 {
2130 /* If netscape tolerance is on, ignore errors */
2131 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2132 goto cont;
2133 else
2134 {
2135 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2137 goto err;
2138 }
2139 }
2140
2141 if (q != (p+l))
2142 {
2143 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2144 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2145 goto err;
2146 }
2147 if (!sk_X509_NAME_push(ca_sk,xn))
2148 {
2149 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2150 goto err;
2151 }
2152
2153 p+=l;
2154 nc+=l+2;
2155 }
2156
2157 if (0)
2158 {
2159 cont:
2160 ERR_clear_error();
2161 }
2162
2163 /* we should setup a certificate to return.... */
2164 s->s3->tmp.cert_req=1;
2165 s->s3->tmp.ctype_num=ctype_num;
2166 if (s->s3->tmp.ca_names != NULL)
2167 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2168 s->s3->tmp.ca_names=ca_sk;
2169 ca_sk=NULL;
2170
2171 ret=1;
2172 err:
2173 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2174 return(ret);
2175 }
2176
2177 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2178 {
2179 return(X509_NAME_cmp(*a,*b));
2180 }
2181 #ifndef OPENSSL_NO_TLSEXT
2182 int ssl3_get_new_session_ticket(SSL *s)
2183 {
2184 int ok,al,ret=0, ticklen;
2185 long n;
2186 const unsigned char *p;
2187 unsigned char *d;
2188
2189 n=s->method->ssl_get_message(s,
2190 SSL3_ST_CR_SESSION_TICKET_A,
2191 SSL3_ST_CR_SESSION_TICKET_B,
2192 -1,
2193 16384,
2194 &ok);
2195
2196 if (!ok)
2197 return((int)n);
2198
2199 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2200 {
2201 s->s3->tmp.reuse_message=1;
2202 return(1);
2203 }
2204 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2205 {
2206 al=SSL_AD_UNEXPECTED_MESSAGE;
2207 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2208 goto f_err;
2209 }
2210 if (n < 6)
2211 {
2212 /* need at least ticket_lifetime_hint + ticket length */
2213 al = SSL_AD_DECODE_ERROR;
2214 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2215 goto f_err;
2216 }
2217
2218 p=d=(unsigned char *)s->init_msg;
2219 n2l(p, s->session->tlsext_tick_lifetime_hint);
2220 n2s(p, ticklen);
2221 /* ticket_lifetime_hint + ticket_length + ticket */
2222 if (ticklen + 6 != n)
2223 {
2224 al = SSL_AD_DECODE_ERROR;
2225 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2226 goto f_err;
2227 }
2228 if (s->session->tlsext_tick)
2229 {
2230 OPENSSL_free(s->session->tlsext_tick);
2231 s->session->tlsext_ticklen = 0;
2232 }
2233 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2234 if (!s->session->tlsext_tick)
2235 {
2236 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2237 goto err;
2238 }
2239 memcpy(s->session->tlsext_tick, p, ticklen);
2240 s->session->tlsext_ticklen = ticklen;
2241 /* There are two ways to detect a resumed ticket sesion.
2242 * One is to set an appropriate session ID and then the server
2243 * must return a match in ServerHello. This allows the normal
2244 * client session ID matching to work and we know much
2245 * earlier that the ticket has been accepted.
2246 *
2247 * The other way is to set zero length session ID when the
2248 * ticket is presented and rely on the handshake to determine
2249 * session resumption.
2250 *
2251 * We choose the former approach because this fits in with
2252 * assumptions elsewhere in OpenSSL. The session ID is set
2253 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2254 * ticket.
2255 */
2256 EVP_Digest(p, ticklen,
2257 s->session->session_id, &s->session->session_id_length,
2258 #ifndef OPENSSL_NO_SHA256
2259 EVP_sha256(), NULL);
2260 #else
2261 EVP_sha1(), NULL);
2262 #endif
2263 ret=1;
2264 return(ret);
2265 f_err:
2266 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2267 err:
2268 return(-1);
2269 }
2270
2271 int ssl3_get_cert_status(SSL *s)
2272 {
2273 int ok, al;
2274 unsigned long resplen,n;
2275 const unsigned char *p;
2276
2277 n=s->method->ssl_get_message(s,
2278 SSL3_ST_CR_CERT_STATUS_A,
2279 SSL3_ST_CR_CERT_STATUS_B,
2280 SSL3_MT_CERTIFICATE_STATUS,
2281 16384,
2282 &ok);
2283
2284 if (!ok) return((int)n);
2285 if (n < 4)
2286 {
2287 /* need at least status type + length */
2288 al = SSL_AD_DECODE_ERROR;
2289 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2290 goto f_err;
2291 }
2292 p = (unsigned char *)s->init_msg;
2293 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2294 {
2295 al = SSL_AD_DECODE_ERROR;
2296 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2297 goto f_err;
2298 }
2299 n2l3(p, resplen);
2300 if (resplen + 4 != n)
2301 {
2302 al = SSL_AD_DECODE_ERROR;
2303 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2304 goto f_err;
2305 }
2306 if (s->tlsext_ocsp_resp)
2307 OPENSSL_free(s->tlsext_ocsp_resp);
2308 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2309 if (!s->tlsext_ocsp_resp)
2310 {
2311 al = SSL_AD_INTERNAL_ERROR;
2312 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2313 goto f_err;
2314 }
2315 s->tlsext_ocsp_resplen = resplen;
2316 if (s->ctx->tlsext_status_cb)
2317 {
2318 int ret;
2319 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2320 if (ret == 0)
2321 {
2322 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2323 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2324 goto f_err;
2325 }
2326 if (ret < 0)
2327 {
2328 al = SSL_AD_INTERNAL_ERROR;
2329 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2330 goto f_err;
2331 }
2332 }
2333 return 1;
2334 f_err:
2335 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2336 return(-1);
2337 }
2338 #endif
2339
2340 int ssl3_get_server_done(SSL *s)
2341 {
2342 int ok,ret=0;
2343 long n;
2344
2345 n=s->method->ssl_get_message(s,
2346 SSL3_ST_CR_SRVR_DONE_A,
2347 SSL3_ST_CR_SRVR_DONE_B,
2348 SSL3_MT_SERVER_DONE,
2349 30, /* should be very small, like 0 :-) */
2350 &ok);
2351
2352 if (!ok) return((int)n);
2353 if (n > 0)
2354 {
2355 /* should contain no data */
2356 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2357 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2358 return -1;
2359 }
2360 ret=1;
2361 return(ret);
2362 }
2363
2364
2365 int ssl3_send_client_key_exchange(SSL *s)
2366 {
2367 unsigned char *p;
2368 int n;
2369 unsigned long alg_k;
2370 #ifndef OPENSSL_NO_RSA
2371 unsigned char *q;
2372 EVP_PKEY *pkey=NULL;
2373 #endif
2374 #ifndef OPENSSL_NO_KRB5
2375 KSSL_ERR kssl_err;
2376 #endif /* OPENSSL_NO_KRB5 */
2377 #ifndef OPENSSL_NO_ECDH
2378 EC_KEY *clnt_ecdh = NULL;
2379 const EC_POINT *srvr_ecpoint = NULL;
2380 EVP_PKEY *srvr_pub_pkey = NULL;
2381 unsigned char *encodedPoint = NULL;
2382 int encoded_pt_len = 0;
2383 BN_CTX * bn_ctx = NULL;
2384 #endif
2385
2386 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2387 {
2388 p = ssl_handshake_start(s);
2389
2390 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2391
2392 /* Fool emacs indentation */
2393 if (0) {}
2394 #ifndef OPENSSL_NO_RSA
2395 else if (alg_k & SSL_kRSA)
2396 {
2397 RSA *rsa;
2398 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2399
2400 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2401 rsa=s->session->sess_cert->peer_rsa_tmp;
2402 else
2403 {
2404 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2405 if ((pkey == NULL) ||
2406 (pkey->type != EVP_PKEY_RSA) ||
2407 (pkey->pkey.rsa == NULL))
2408 {
2409 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2410 goto err;
2411 }
2412 rsa=pkey->pkey.rsa;
2413 EVP_PKEY_free(pkey);
2414 }
2415
2416 tmp_buf[0]=s->client_version>>8;
2417 tmp_buf[1]=s->client_version&0xff;
2418 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2419 goto err;
2420
2421 s->session->master_key_length=sizeof tmp_buf;
2422
2423 q=p;
2424 /* Fix buf for TLS and beyond */
2425 if (s->version > SSL3_VERSION)
2426 p+=2;
2427 n=RSA_public_encrypt(sizeof tmp_buf,
2428 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2429 #ifdef PKCS1_CHECK
2430 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2431 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2432 #endif
2433 if (n <= 0)
2434 {
2435 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2436 goto err;
2437 }
2438
2439 /* Fix buf for TLS and beyond */
2440 if (s->version > SSL3_VERSION)
2441 {
2442 s2n(n,q);
2443 n+=2;
2444 }
2445
2446 s->session->master_key_length=
2447 s->method->ssl3_enc->generate_master_secret(s,
2448 s->session->master_key,
2449 tmp_buf,sizeof tmp_buf);
2450 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2451 }
2452 #endif
2453 #ifndef OPENSSL_NO_KRB5
2454 else if (alg_k & SSL_kKRB5)
2455 {
2456 krb5_error_code krb5rc;
2457 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2458 /* krb5_data krb5_ap_req; */
2459 krb5_data *enc_ticket;
2460 krb5_data authenticator, *authp = NULL;
2461 EVP_CIPHER_CTX ciph_ctx;
2462 const EVP_CIPHER *enc = NULL;
2463 unsigned char iv[EVP_MAX_IV_LENGTH];
2464 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2465 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2466 + EVP_MAX_IV_LENGTH];
2467 int padl, outl = sizeof(epms);
2468
2469 EVP_CIPHER_CTX_init(&ciph_ctx);
2470
2471 #ifdef KSSL_DEBUG
2472 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2473 alg_k, SSL_kKRB5);
2474 #endif /* KSSL_DEBUG */
2475
2476 authp = NULL;
2477 #ifdef KRB5SENDAUTH
2478 if (KRB5SENDAUTH) authp = &authenticator;
2479 #endif /* KRB5SENDAUTH */
2480
2481 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2482 &kssl_err);
2483 enc = kssl_map_enc(kssl_ctx->enctype);
2484 if (enc == NULL)
2485 goto err;
2486 #ifdef KSSL_DEBUG
2487 {
2488 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2489 if (krb5rc && kssl_err.text)
2490 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2491 }
2492 #endif /* KSSL_DEBUG */
2493
2494 if (krb5rc)
2495 {
2496 ssl3_send_alert(s,SSL3_AL_FATAL,
2497 SSL_AD_HANDSHAKE_FAILURE);
2498 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2499 kssl_err.reason);
2500 goto err;
2501 }
2502
2503 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2504 ** in place of RFC 2712 KerberosWrapper, as in:
2505 **
2506 ** Send ticket (copy to *p, set n = length)
2507 ** n = krb5_ap_req.length;
2508 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2509 ** if (krb5_ap_req.data)
2510 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2511 **
2512 ** Now using real RFC 2712 KerberosWrapper
2513 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2514 ** Note: 2712 "opaque" types are here replaced
2515 ** with a 2-byte length followed by the value.
2516 ** Example:
2517 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2518 ** Where "xx xx" = length bytes. Shown here with
2519 ** optional authenticator omitted.
2520 */
2521
2522 /* KerberosWrapper.Ticket */
2523 s2n(enc_ticket->length,p);
2524 memcpy(p, enc_ticket->data, enc_ticket->length);
2525 p+= enc_ticket->length;
2526 n = enc_ticket->length + 2;
2527
2528 /* KerberosWrapper.Authenticator */
2529 if (authp && authp->length)
2530 {
2531 s2n(authp->length,p);
2532 memcpy(p, authp->data, authp->length);
2533 p+= authp->length;
2534 n+= authp->length + 2;
2535
2536 free(authp->data);
2537 authp->data = NULL;
2538 authp->length = 0;
2539 }
2540 else
2541 {
2542 s2n(0,p);/* null authenticator length */
2543 n+=2;
2544 }
2545
2546 tmp_buf[0]=s->client_version>>8;
2547 tmp_buf[1]=s->client_version&0xff;
2548 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2549 goto err;
2550
2551 /* 20010420 VRS. Tried it this way; failed.
2552 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2553 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2554 ** kssl_ctx->length);
2555 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2556 */
2557
2558 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2559 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2560 kssl_ctx->key,iv);
2561 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2562 sizeof tmp_buf);
2563 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2564 outl += padl;
2565 if (outl > (int)sizeof epms)
2566 {
2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2568 goto err;
2569 }
2570 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2571
2572 /* KerberosWrapper.EncryptedPreMasterSecret */
2573 s2n(outl,p);
2574 memcpy(p, epms, outl);
2575 p+=outl;
2576 n+=outl + 2;
2577
2578 s->session->master_key_length=
2579 s->method->ssl3_enc->generate_master_secret(s,
2580 s->session->master_key,
2581 tmp_buf, sizeof tmp_buf);
2582
2583 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2584 OPENSSL_cleanse(epms, outl);
2585 }
2586 #endif
2587 #ifndef OPENSSL_NO_DH
2588 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2589 {
2590 DH *dh_srvr,*dh_clnt;
2591 SESS_CERT *scert = s->session->sess_cert;
2592
2593 if (scert == NULL)
2594 {
2595 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2596 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2597 goto err;
2598 }
2599
2600 if (scert->peer_dh_tmp != NULL)
2601 dh_srvr=scert->peer_dh_tmp;
2602 else
2603 {
2604 /* we get them from the cert */
2605 int idx = scert->peer_cert_type;
2606 EVP_PKEY *spkey = NULL;
2607 dh_srvr = NULL;
2608 if (idx >= 0)
2609 spkey = X509_get_pubkey(
2610 scert->peer_pkeys[idx].x509);
2611 if (spkey)
2612 {
2613 dh_srvr = EVP_PKEY_get1_DH(spkey);
2614 EVP_PKEY_free(spkey);
2615 }
2616 if (dh_srvr == NULL)
2617 {
2618 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2619 ERR_R_INTERNAL_ERROR);
2620 goto err;
2621 }
2622 }
2623 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2624 {
2625 /* Use client certificate key */
2626 EVP_PKEY *clkey = s->cert->key->privatekey;
2627 dh_clnt = NULL;
2628 if (clkey)
2629 dh_clnt = EVP_PKEY_get1_DH(clkey);
2630 if (dh_clnt == NULL)
2631 {
2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2633 ERR_R_INTERNAL_ERROR);
2634 goto err;
2635 }
2636 }
2637 else
2638 {
2639 /* generate a new random key */
2640 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2641 {
2642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2643 goto err;
2644 }
2645 if (!DH_generate_key(dh_clnt))
2646 {
2647 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2648 DH_free(dh_clnt);
2649 goto err;
2650 }
2651 }
2652
2653 /* use the 'p' output buffer for the DH key, but
2654 * make sure to clear it out afterwards */
2655
2656 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2657 if (scert->peer_dh_tmp == NULL)
2658 DH_free(dh_srvr);
2659
2660 if (n <= 0)
2661 {
2662 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2663 DH_free(dh_clnt);
2664 goto err;
2665 }
2666
2667 /* generate master key from the result */
2668 s->session->master_key_length=
2669 s->method->ssl3_enc->generate_master_secret(s,
2670 s->session->master_key,p,n);
2671 /* clean up */
2672 memset(p,0,n);
2673
2674 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2675 n = 0;
2676 else
2677 {
2678 /* send off the data */
2679 n=BN_num_bytes(dh_clnt->pub_key);
2680 s2n(n,p);
2681 BN_bn2bin(dh_clnt->pub_key,p);
2682 n+=2;
2683 }
2684
2685 DH_free(dh_clnt);
2686
2687 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2688 }
2689 #endif
2690
2691 #ifndef OPENSSL_NO_ECDH
2692 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2693 {
2694 const EC_GROUP *srvr_group = NULL;
2695 EC_KEY *tkey;
2696 int ecdh_clnt_cert = 0;
2697 int field_size = 0;
2698
2699 /* Did we send out the client's
2700 * ECDH share for use in premaster
2701 * computation as part of client certificate?
2702 * If so, set ecdh_clnt_cert to 1.
2703 */
2704 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2705 {
2706 /* XXX: For now, we do not support client
2707 * authentication using ECDH certificates.
2708 * To add such support, one needs to add
2709 * code that checks for appropriate
2710 * conditions and sets ecdh_clnt_cert to 1.
2711 * For example, the cert have an ECC
2712 * key on the same curve as the server's
2713 * and the key should be authorized for
2714 * key agreement.
2715 *
2716 * One also needs to add code in ssl3_connect
2717 * to skip sending the certificate verify
2718 * message.
2719 *
2720 * if ((s->cert->key->privatekey != NULL) &&
2721 * (s->cert->key->privatekey->type ==
2722 * EVP_PKEY_EC) && ...)
2723 * ecdh_clnt_cert = 1;
2724 */
2725 }
2726
2727 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2728 {
2729 tkey = s->session->sess_cert->peer_ecdh_tmp;
2730 }
2731 else
2732 {
2733 /* Get the Server Public Key from Cert */
2734 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2735 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2736 if ((srvr_pub_pkey == NULL) ||
2737 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2738 (srvr_pub_pkey->pkey.ec == NULL))
2739 {
2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2741 ERR_R_INTERNAL_ERROR);
2742 goto err;
2743 }
2744
2745 tkey = srvr_pub_pkey->pkey.ec;
2746 }
2747
2748 srvr_group = EC_KEY_get0_group(tkey);
2749 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2750
2751 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2752 {
2753 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2754 ERR_R_INTERNAL_ERROR);
2755 goto err;
2756 }
2757
2758 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2759 {
2760 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2761 goto err;
2762 }
2763
2764 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2765 {
2766 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2767 goto err;
2768 }
2769 if (ecdh_clnt_cert)
2770 {
2771 /* Reuse key info from our certificate
2772 * We only need our private key to perform
2773 * the ECDH computation.
2774 */
2775 const BIGNUM *priv_key;
2776 tkey = s->cert->key->privatekey->pkey.ec;
2777 priv_key = EC_KEY_get0_private_key(tkey);
2778 if (priv_key == NULL)
2779 {
2780 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2781 goto err;
2782 }
2783 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2784 {
2785 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2786 goto err;
2787 }
2788 }
2789 else
2790 {
2791 /* Generate a new ECDH key pair */
2792 if (!(EC_KEY_generate_key(clnt_ecdh)))
2793 {
2794 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2795 goto err;
2796 }
2797 }
2798
2799 /* use the 'p' output buffer for the ECDH key, but
2800 * make sure to clear it out afterwards
2801 */
2802
2803 field_size = EC_GROUP_get_degree(srvr_group);
2804 if (field_size <= 0)
2805 {
2806 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2807 ERR_R_ECDH_LIB);
2808 goto err;
2809 }
2810 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2811 if (n <= 0)
2812 {
2813 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2814 ERR_R_ECDH_LIB);
2815 goto err;
2816 }
2817
2818 /* generate master key from the result */
2819 s->session->master_key_length = s->method->ssl3_enc \
2820 -> generate_master_secret(s,
2821 s->session->master_key,
2822 p, n);
2823
2824 memset(p, 0, n); /* clean up */
2825
2826 if (ecdh_clnt_cert)
2827 {
2828 /* Send empty client key exch message */
2829 n = 0;
2830 }
2831 else
2832 {
2833 /* First check the size of encoding and
2834 * allocate memory accordingly.
2835 */
2836 encoded_pt_len =
2837 EC_POINT_point2oct(srvr_group,
2838 EC_KEY_get0_public_key(clnt_ecdh),
2839 POINT_CONVERSION_UNCOMPRESSED,
2840 NULL, 0, NULL);
2841
2842 encodedPoint = (unsigned char *)
2843 OPENSSL_malloc(encoded_pt_len *
2844 sizeof(unsigned char));
2845 bn_ctx = BN_CTX_new();
2846 if ((encodedPoint == NULL) ||
2847 (bn_ctx == NULL))
2848 {
2849 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2850 goto err;
2851 }
2852
2853 /* Encode the public key */
2854 n = EC_POINT_point2oct(srvr_group,
2855 EC_KEY_get0_public_key(clnt_ecdh),
2856 POINT_CONVERSION_UNCOMPRESSED,
2857 encodedPoint, encoded_pt_len, bn_ctx);
2858
2859 *p = n; /* length of encoded point */
2860 /* Encoded point will be copied here */
2861 p += 1;
2862 /* copy the point */
2863 memcpy((unsigned char *)p, encodedPoint, n);
2864 /* increment n to account for length field */
2865 n += 1;
2866 }
2867
2868 /* Free allocated memory */
2869 BN_CTX_free(bn_ctx);
2870 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2871 if (clnt_ecdh != NULL)
2872 EC_KEY_free(clnt_ecdh);
2873 EVP_PKEY_free(srvr_pub_pkey);
2874 }
2875 #endif /* !OPENSSL_NO_ECDH */
2876 else if (alg_k & SSL_kGOST)
2877 {
2878 /* GOST key exchange message creation */
2879 EVP_PKEY_CTX *pkey_ctx;
2880 X509 *peer_cert;
2881 size_t msglen;
2882 unsigned int md_len;
2883 int keytype;
2884 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2885 EVP_MD_CTX *ukm_hash;
2886 EVP_PKEY *pub_key;
2887
2888 /* Get server sertificate PKEY and create ctx from it */
2889 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2890 if (!peer_cert)
2891 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2892 if (!peer_cert) {
2893 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2894 goto err;
2895 }
2896
2897 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2898 /* If we have send a certificate, and certificate key
2899
2900 * parameters match those of server certificate, use
2901 * certificate key for key exchange
2902 */
2903
2904 /* Otherwise, generate ephemeral key pair */
2905
2906 EVP_PKEY_encrypt_init(pkey_ctx);
2907 /* Generate session key */
2908 RAND_bytes(premaster_secret,32);
2909 /* If we have client certificate, use its secret as peer key */
2910 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2911 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2912 /* If there was an error - just ignore it. Ephemeral key
2913 * would be used
2914 */
2915 ERR_clear_error();
2916 }
2917 }
2918 /* Compute shared IV and store it in algorithm-specific
2919 * context data */
2920 ukm_hash = EVP_MD_CTX_create();
2921 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2922 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2923 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2924 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2925 EVP_MD_CTX_destroy(ukm_hash);
2926 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2927 8,shared_ukm)<0) {
2928 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2929 SSL_R_LIBRARY_BUG);
2930 goto err;
2931 }
2932 /* Make GOST keytransport blob message */
2933 /*Encapsulate it into sequence */
2934 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2935 msglen=255;
2936 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2937 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2938 SSL_R_LIBRARY_BUG);
2939 goto err;
2940 }
2941 if (msglen >= 0x80)
2942 {
2943 *(p++)=0x81;
2944 *(p++)= msglen & 0xff;
2945 n=msglen+3;
2946 }
2947 else
2948 {
2949 *(p++)= msglen & 0xff;
2950 n=msglen+2;
2951 }
2952 memcpy(p, tmp, msglen);
2953 /* Check if pubkey from client certificate was used */
2954 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2955 {
2956 /* Set flag "skip certificate verify" */
2957 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2958 }
2959 EVP_PKEY_CTX_free(pkey_ctx);
2960 s->session->master_key_length=
2961 s->method->ssl3_enc->generate_master_secret(s,
2962 s->session->master_key,premaster_secret,32);
2963 EVP_PKEY_free(pub_key);
2964
2965 }
2966 #ifndef OPENSSL_NO_SRP
2967 else if (alg_k & SSL_kSRP)
2968 {
2969 if (s->srp_ctx.A != NULL)
2970 {
2971 /* send off the data */
2972 n=BN_num_bytes(s->srp_ctx.A);
2973 s2n(n,p);
2974 BN_bn2bin(s->srp_ctx.A,p);
2975 n+=2;
2976 }
2977 else
2978 {
2979 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2980 goto err;
2981 }
2982 if (s->session->srp_username != NULL)
2983 OPENSSL_free(s->session->srp_username);
2984 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2985 if (s->session->srp_username == NULL)
2986 {
2987 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2988 ERR_R_MALLOC_FAILURE);
2989 goto err;
2990 }
2991
2992 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2993 {
2994 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2995 goto err;
2996 }
2997 }
2998 #endif
2999 #ifndef OPENSSL_NO_PSK
3000 else if (alg_k & SSL_kPSK)
3001 {
3002 char identity[PSK_MAX_IDENTITY_LEN];
3003 unsigned char *t = NULL;
3004 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3005 unsigned int pre_ms_len = 0, psk_len = 0;
3006 int psk_err = 1;
3007
3008 n = 0;
3009 if (s->psk_client_callback == NULL)
3010 {
3011 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3012 SSL_R_PSK_NO_CLIENT_CB);
3013 goto err;
3014 }
3015
3016 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3017 identity, PSK_MAX_IDENTITY_LEN,
3018 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3019 if (psk_len > PSK_MAX_PSK_LEN)
3020 {
3021 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3022 ERR_R_INTERNAL_ERROR);
3023 goto psk_err;
3024 }
3025 else if (psk_len == 0)
3026 {
3027 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3028 SSL_R_PSK_IDENTITY_NOT_FOUND);
3029 goto psk_err;
3030 }
3031
3032 /* create PSK pre_master_secret */
3033 pre_ms_len = 2+psk_len+2+psk_len;
3034 t = psk_or_pre_ms;
3035 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3036 s2n(psk_len, t);
3037 memset(t, 0, psk_len);
3038 t+=psk_len;
3039 s2n(psk_len, t);
3040
3041 if (s->session->psk_identity_hint != NULL)
3042 OPENSSL_free(s->session->psk_identity_hint);
3043 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3044 if (s->ctx->psk_identity_hint != NULL &&
3045 s->session->psk_identity_hint == NULL)
3046 {
3047 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3048 ERR_R_MALLOC_FAILURE);
3049 goto psk_err;
3050 }
3051
3052 if (s->session->psk_identity != NULL)
3053 OPENSSL_free(s->session->psk_identity);
3054 s->session->psk_identity = BUF_strdup(identity);
3055 if (s->session->psk_identity == NULL)
3056 {
3057 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3058 ERR_R_MALLOC_FAILURE);
3059 goto psk_err;
3060 }
3061
3062 s->session->master_key_length =
3063 s->method->ssl3_enc->generate_master_secret(s,
3064 s->session->master_key,
3065 psk_or_pre_ms, pre_ms_len);
3066 n = strlen(identity);
3067 s2n(n, p);
3068 memcpy(p, identity, n);
3069 n+=2;
3070 psk_err = 0;
3071 psk_err:
3072 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3073 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3074 if (psk_err != 0)
3075 {
3076 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3077 goto err;
3078 }
3079 }
3080 #endif
3081 else
3082 {
3083 ssl3_send_alert(s, SSL3_AL_FATAL,
3084 SSL_AD_HANDSHAKE_FAILURE);
3085 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3086 ERR_R_INTERNAL_ERROR);
3087 goto err;
3088 }
3089
3090 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3091 s->state=SSL3_ST_CW_KEY_EXCH_B;
3092 }
3093
3094 /* SSL3_ST_CW_KEY_EXCH_B */
3095 return ssl_do_write(s);
3096 err:
3097 #ifndef OPENSSL_NO_ECDH
3098 BN_CTX_free(bn_ctx);
3099 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3100 if (clnt_ecdh != NULL)
3101 EC_KEY_free(clnt_ecdh);
3102 EVP_PKEY_free(srvr_pub_pkey);
3103 #endif
3104 return(-1);
3105 }
3106
3107 int ssl3_send_client_verify(SSL *s)
3108 {
3109 unsigned char *p;
3110 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3111 EVP_PKEY *pkey;
3112 EVP_PKEY_CTX *pctx=NULL;
3113 EVP_MD_CTX mctx;
3114 unsigned u=0;
3115 unsigned long n;
3116 int j;
3117
3118 EVP_MD_CTX_init(&mctx);
3119
3120 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3121 {
3122 p= ssl_handshake_start(s);
3123 pkey=s->cert->key->privatekey;
3124 /* Create context from key and test if sha1 is allowed as digest */
3125 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3126 EVP_PKEY_sign_init(pctx);
3127 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3128 {
3129 if (!SSL_USE_SIGALGS(s))
3130 s->method->ssl3_enc->cert_verify_mac(s,
3131 NID_sha1,
3132 &(data[MD5_DIGEST_LENGTH]));
3133 }
3134 else
3135 {
3136 ERR_clear_error();
3137 }
3138 /* For TLS v1.2 send signature algorithm and signature
3139 * using agreed digest and cached handshake records.
3140 */
3141 if (SSL_USE_SIGALGS(s))
3142 {
3143 long hdatalen = 0;
3144 void *hdata;
3145 const EVP_MD *md = s->cert->key->digest;
3146 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3147 &hdata);
3148 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3149 {
3150 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3151 ERR_R_INTERNAL_ERROR);
3152 goto err;
3153 }
3154 p += 2;
3155 #ifdef SSL_DEBUG
3156 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3157 EVP_MD_name(md));
3158 #endif
3159 if (!EVP_SignInit_ex(&mctx, md, NULL)
3160 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3161 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3162 {
3163 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3164 ERR_R_EVP_LIB);
3165 goto err;
3166 }
3167 s2n(u,p);
3168 n = u + 4;
3169 if (!ssl3_digest_cached_records(s))
3170 goto err;
3171 }
3172 else
3173 #ifndef OPENSSL_NO_RSA
3174 if (pkey->type == EVP_PKEY_RSA)
3175 {
3176 s->method->ssl3_enc->cert_verify_mac(s,
3177 NID_md5,
3178 &(data[0]));
3179 if (RSA_sign(NID_md5_sha1, data,
3180 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3181 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3182 {
3183 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3184 goto err;
3185 }
3186 s2n(u,p);
3187 n=u+2;
3188 }
3189 else
3190 #endif
3191 #ifndef OPENSSL_NO_DSA
3192 if (pkey->type == EVP_PKEY_DSA)
3193 {
3194 if (!DSA_sign(pkey->save_type,
3195 &(data[MD5_DIGEST_LENGTH]),
3196 SHA_DIGEST_LENGTH,&(p[2]),
3197 (unsigned int *)&j,pkey->pkey.dsa))
3198 {
3199 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3200 goto err;
3201 }
3202 s2n(j,p);
3203 n=j+2;
3204 }
3205 else
3206 #endif
3207 #ifndef OPENSSL_NO_ECDSA
3208 if (pkey->type == EVP_PKEY_EC)
3209 {
3210 if (!ECDSA_sign(pkey->save_type,
3211 &(data[MD5_DIGEST_LENGTH]),
3212 SHA_DIGEST_LENGTH,&(p[2]),
3213 (unsigned int *)&j,pkey->pkey.ec))
3214 {
3215 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3216 ERR_R_ECDSA_LIB);
3217 goto err;
3218 }
3219 s2n(j,p);
3220 n=j+2;
3221 }
3222 else
3223 #endif
3224 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3225 {
3226 unsigned char signbuf[64];
3227 int i;
3228 size_t sigsize=64;
3229 s->method->ssl3_enc->cert_verify_mac(s,
3230 NID_id_GostR3411_94,
3231 data);
3232 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3233 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3234 ERR_R_INTERNAL_ERROR);
3235 goto err;
3236 }
3237 for (i=63,j=0; i>=0; j++, i--) {
3238 p[2+j]=signbuf[i];
3239 }
3240 s2n(j,p);
3241 n=j+2;
3242 }
3243 else
3244 {
3245 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3246 goto err;
3247 }
3248 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3249 s->state=SSL3_ST_CW_CERT_VRFY_B;
3250 }
3251 EVP_MD_CTX_cleanup(&mctx);
3252 EVP_PKEY_CTX_free(pctx);
3253 return ssl_do_write(s);
3254 err:
3255 EVP_MD_CTX_cleanup(&mctx);
3256 EVP_PKEY_CTX_free(pctx);
3257 return(-1);
3258 }
3259
3260 /* Check a certificate can be used for client authentication. Currently
3261 * check cert exists, if we have a suitable digest for TLS 1.2 if
3262 * static DH client certificates can be used and optionally checks
3263 * suitability for Suite B.
3264 */
3265 static int ssl3_check_client_certificate(SSL *s)
3266 {
3267 unsigned long alg_k;
3268 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3269 return 0;
3270 /* If no suitable signature algorithm can't use certificate */
3271 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3272 return 0;
3273 /* If strict mode check suitability of chain before using it.
3274 * This also adjusts suite B digest if necessary.
3275 */
3276 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3277 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3278 return 0;
3279 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3280 /* See if we can use client certificate for fixed DH */
3281 if (alg_k & (SSL_kDHr|SSL_kDHd))
3282 {
3283 SESS_CERT *scert = s->session->sess_cert;
3284 int i = scert->peer_cert_type;
3285 EVP_PKEY *clkey = NULL, *spkey = NULL;
3286 clkey = s->cert->key->privatekey;
3287 /* If client key not DH assume it can be used */
3288 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3289 return 1;
3290 if (i >= 0)
3291 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3292 if (spkey)
3293 {
3294 /* Compare server and client parameters */
3295 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3296 EVP_PKEY_free(spkey);
3297 if (i != 1)
3298 return 0;
3299 }
3300 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3301 }
3302 return 1;
3303 }
3304
3305 int ssl3_send_client_certificate(SSL *s)
3306 {
3307 X509 *x509=NULL;
3308 EVP_PKEY *pkey=NULL;
3309 int i;
3310
3311 if (s->state == SSL3_ST_CW_CERT_A)
3312 {
3313 /* Let cert callback update client certificates if required */
3314 if (s->cert->cert_cb
3315 && s->cert->cert_cb(s, s->cert->cert_cb_arg) <= 0)
3316 {
3317 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3318 return 0;
3319 }
3320 if (ssl3_check_client_certificate(s))
3321 s->state=SSL3_ST_CW_CERT_C;
3322 else
3323 s->state=SSL3_ST_CW_CERT_B;
3324 }
3325
3326 /* We need to get a client cert */
3327 if (s->state == SSL3_ST_CW_CERT_B)
3328 {
3329 /* If we get an error, we need to
3330 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3331 * We then get retied later */
3332 i=0;
3333 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3334 if (i < 0)
3335 {
3336 s->rwstate=SSL_X509_LOOKUP;
3337 return(-1);
3338 }
3339 s->rwstate=SSL_NOTHING;
3340 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3341 {
3342 s->state=SSL3_ST_CW_CERT_B;
3343 if ( !SSL_use_certificate(s,x509) ||
3344 !SSL_use_PrivateKey(s,pkey))
3345 i=0;
3346 }
3347 else if (i == 1)
3348 {
3349 i=0;
3350 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3351 }
3352
3353 if (x509 != NULL) X509_free(x509);
3354 if (pkey != NULL) EVP_PKEY_free(pkey);
3355 if (i && !ssl3_check_client_certificate(s))
3356 i = 0;
3357 if (i == 0)
3358 {
3359 if (s->version == SSL3_VERSION)
3360 {
3361 s->s3->tmp.cert_req=0;
3362 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3363 return(1);
3364 }
3365 else
3366 {
3367 s->s3->tmp.cert_req=2;
3368 }
3369 }
3370
3371 /* Ok, we have a cert */
3372 s->state=SSL3_ST_CW_CERT_C;
3373 }
3374
3375 if (s->state == SSL3_ST_CW_CERT_C)
3376 {
3377 s->state=SSL3_ST_CW_CERT_D;
3378 ssl3_output_cert_chain(s,
3379 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3380 }
3381 /* SSL3_ST_CW_CERT_D */
3382 return ssl_do_write(s);
3383 }
3384
3385 #define has_bits(i,m) (((i)&(m)) == (m))
3386
3387 int ssl3_check_cert_and_algorithm(SSL *s)
3388 {
3389 int i,idx;
3390 long alg_k,alg_a;
3391 EVP_PKEY *pkey=NULL;
3392 SESS_CERT *sc;
3393 #ifndef OPENSSL_NO_RSA
3394 RSA *rsa;
3395 #endif
3396 #ifndef OPENSSL_NO_DH
3397 DH *dh;
3398 #endif
3399
3400 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3401 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3402
3403 /* we don't have a certificate */
3404 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3405 return(1);
3406
3407 sc=s->session->sess_cert;
3408 if (sc == NULL)
3409 {
3410 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3411 goto err;
3412 }
3413
3414 #ifndef OPENSSL_NO_RSA
3415 rsa=s->session->sess_cert->peer_rsa_tmp;
3416 #endif
3417 #ifndef OPENSSL_NO_DH
3418 dh=s->session->sess_cert->peer_dh_tmp;
3419 #endif
3420
3421 /* This is the passed certificate */
3422
3423 idx=sc->peer_cert_type;
3424 #ifndef OPENSSL_NO_ECDH
3425 if (idx == SSL_PKEY_ECC)
3426 {
3427 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3428 s) == 0)
3429 { /* check failed */
3430 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3431 goto f_err;
3432 }
3433 else
3434 {
3435 return 1;
3436 }
3437 }
3438 else if (alg_a & SSL_aECDSA)
3439 {
3440 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3441 goto f_err;
3442 }
3443 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3444 {
3445 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3446 goto f_err;
3447 }
3448 #endif
3449 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3450 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3451 EVP_PKEY_free(pkey);
3452
3453
3454 /* Check that we have a certificate if we require one */
3455 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3456 {
3457 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3458 goto f_err;
3459 }
3460 #ifndef OPENSSL_NO_DSA
3461 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3462 {
3463 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3464 goto f_err;
3465 }
3466 #endif
3467 #ifndef OPENSSL_NO_RSA
3468 if ((alg_k & SSL_kRSA) &&
3469 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3470 {
3471 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3472 goto f_err;
3473 }
3474 #endif
3475 #ifndef OPENSSL_NO_DH
3476 if ((alg_k & SSL_kEDH) &&
3477 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3478 {
3479 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3480 goto f_err;
3481 }
3482 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3483 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3484 {
3485 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3486 goto f_err;
3487 }
3488 #ifndef OPENSSL_NO_DSA
3489 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3490 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3491 {
3492 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3493 goto f_err;
3494 }
3495 #endif
3496 #endif
3497
3498 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3499 {
3500 #ifndef OPENSSL_NO_RSA
3501 if (alg_k & SSL_kRSA)
3502 {
3503 if (rsa == NULL
3504 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3505 {
3506 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3507 goto f_err;
3508 }
3509 }
3510 else
3511 #endif
3512 #ifndef OPENSSL_NO_DH
3513 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3514 {
3515 if (dh == NULL
3516 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3517 {
3518 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3519 goto f_err;
3520 }
3521 }
3522 else
3523 #endif
3524 {
3525 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3526 goto f_err;
3527 }
3528 }
3529 return(1);
3530 f_err:
3531 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3532 err:
3533 return(0);
3534 }
3535
3536 /* Check to see if handshake is full or resumed. Usually this is just a
3537 * case of checking to see if a cache hit has occurred. In the case of
3538 * session tickets we have to check the next message to be sure.
3539 */
3540
3541 #ifndef OPENSSL_NO_TLSEXT
3542 # ifndef OPENSSL_NO_NEXTPROTONEG
3543 int ssl3_send_next_proto(SSL *s)
3544 {
3545 unsigned int len, padding_len;
3546 unsigned char *d;
3547
3548 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3549 {
3550 len = s->next_proto_negotiated_len;
3551 padding_len = 32 - ((len + 2) % 32);
3552 d = (unsigned char *)s->init_buf->data;
3553 d[4] = len;
3554 memcpy(d + 5, s->next_proto_negotiated, len);
3555 d[5 + len] = padding_len;
3556 memset(d + 6 + len, 0, padding_len);
3557 *(d++)=SSL3_MT_NEXT_PROTO;
3558 l2n3(2 + len + padding_len, d);
3559 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3560 s->init_num = 4 + 2 + len + padding_len;
3561 s->init_off = 0;
3562 }
3563
3564 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3565 }
3566 # endif
3567
3568 int ssl3_check_finished(SSL *s)
3569 {
3570 int ok;
3571 long n;
3572
3573 /* Read the message to see if it is supplemental data,
3574 * regardless if there is a session ticket this function is
3575 * called when we really expect a Certificate message, so
3576 * permit appropriate message length */
3577 n=s->method->ssl_get_message(s,
3578 SSL3_ST_CR_CERT_A,
3579 SSL3_ST_CR_CERT_B,
3580 -1,
3581 s->max_cert_list,
3582 &ok);
3583 if (!ok) return((int)n);
3584 s->s3->tmp.reuse_message = 1;
3585
3586 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3587 return 3;
3588 /* If we have no ticket it cannot be a resumed session. */
3589 if (!s->session->tlsext_tick)
3590 return 1;
3591 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3592 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3593 return 2;
3594
3595 return 1;
3596 }
3597 #endif
3598
3599 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3600 {
3601 int i = 0;
3602 #ifndef OPENSSL_NO_ENGINE
3603 if (s->ctx->client_cert_engine)
3604 {
3605 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3606 SSL_get_client_CA_list(s),
3607 px509, ppkey, NULL, NULL, NULL);
3608 if (i != 0)
3609 return i;
3610 }
3611 #endif
3612 if (s->ctx->client_cert_cb)
3613 i = s->ctx->client_cert_cb(s,px509,ppkey);
3614 return i;
3615 }
3616
3617 #ifndef OPENSSL_NO_TLSEXT
3618 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3619 {
3620 if (s->ctx->cli_supp_data_records_count)
3621 {
3622 unsigned char *p = NULL;
3623 unsigned char *size_loc = NULL;
3624 cli_supp_data_record *record = NULL;
3625 size_t length = 0;
3626 size_t i = 0;
3627
3628 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3629 {
3630 const unsigned char *out = NULL;
3631 unsigned short outlen = 0;
3632 int cb_retval = 0;
3633 record = &s->ctx->cli_supp_data_records[i];
3634
3635 /* NULL callback or -1 omits supp data entry*/
3636 if (!record->fn2)
3637 continue;
3638 cb_retval = record->fn2(s, record->supp_data_type,
3639 &out, &outlen,
3640 record->arg);
3641 if (cb_retval == -1)
3642 continue; /* skip this supp data entry */
3643 if (cb_retval == 0)
3644 {
3645 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3646 return 0;
3647 }
3648 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3649 {
3650 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3651 return 0;
3652 }
3653 /* if first entry, write handshake message type */
3654 if (length == 0)
3655 {
3656 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3657 {
3658 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3659 return 0;
3660 }
3661 p = (unsigned char *)s->init_buf->data;
3662 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3663 /* update message length when all
3664 * callbacks complete */
3665 size_loc = p;
3666 /* skip over handshake length field (3
3667 * bytes) and supp_data length field
3668 * (3 bytes) */
3669 p += 3 + 3;
3670 length += 1 +3 +3;
3671 }
3672 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3673 {
3674 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3675 return 0;
3676 }
3677 s2n(record->supp_data_type, p);
3678 s2n(outlen, p);
3679 memcpy(p, out, outlen);
3680 length += (outlen + 4);
3681 p += outlen;
3682 }
3683 if (length > 0)
3684 {
3685 /* write handshake length */
3686 l2n3(length - 4, size_loc);
3687 /* supp_data length */
3688 l2n3(length - 7, size_loc);
3689 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3690 s->init_num = length;
3691 s->init_off = 0;
3692 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3693 }
3694 }
3695
3696 /* no supp data message sent */
3697 *skip = 1;
3698 s->init_num = 0;
3699 s->init_off = 0;
3700 return 1;
3701 }
3702
3703 int tls1_get_server_supplemental_data(SSL *s)
3704 {
3705 int al = 0;
3706 int ok;
3707 long n;
3708 const unsigned char *p, *d;
3709 unsigned short supp_data_entry_type = 0;
3710 unsigned long supp_data_entry_len = 0;
3711 unsigned long supp_data_len = 0;
3712 size_t i;
3713 int cb_retval = 0;
3714
3715 n=s->method->ssl_get_message(s,
3716 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3717 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3718 SSL3_MT_SUPPLEMENTAL_DATA,
3719 /* use default limit */
3720 TLSEXT_MAXLEN_supplemental_data,
3721 &ok);
3722
3723 if (!ok) return((int)n);
3724
3725 p = (unsigned char *)s->init_msg;
3726 d = p;
3727 /* The message cannot be empty */
3728 if (n < 3)
3729 {
3730 al = SSL_AD_DECODE_ERROR;
3731 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3732 goto f_err;
3733 }
3734 n2l3(p, supp_data_len);
3735 while (p < d+supp_data_len)
3736 {
3737 n2s(p, supp_data_entry_type);
3738 n2s(p, supp_data_entry_len);
3739 /* if there is a callback for this supp data type, send it */
3740 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3741 {
3742 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type && s->ctx->cli_supp_data_records[i].fn1)
3743 {
3744 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p, supp_data_entry_len, &al, s->ctx->cli_supp_data_records[i].arg);
3745 if (cb_retval == 0)
3746 {
3747 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3748 goto f_err;
3749 }
3750 }
3751 }
3752 p += supp_data_entry_len;
3753 }
3754 return 1;
3755 f_err:
3756 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3757 return -1;
3758 }
3759 #endif
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