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