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diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
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1/* $OpenBSD: s3_clnt.c,v 1.108 2015/03/08 16:48:47 miod Exp $ */
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
153#include "ssl_locl.h"
154
155#include <openssl/bn.h>
156#include <openssl/buffer.h>
157#include <openssl/dh.h>
158#include <openssl/evp.h>
159#include <openssl/md5.h>
160#include <openssl/objects.h>
161
162#ifndef OPENSSL_NO_ENGINE
163#include <openssl/engine.h>
164#endif
165#ifndef OPENSSL_NO_GOST
166#include <openssl/gost.h>
167#endif
168
169static const SSL_METHOD *ssl3_get_client_method(int ver);
170static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b);
171
172const SSL_METHOD SSLv3_client_method_data = {
173 .version = SSL3_VERSION,
174 .ssl_new = ssl3_new,
175 .ssl_clear = ssl3_clear,
176 .ssl_free = ssl3_free,
177 .ssl_accept = ssl_undefined_function,
178 .ssl_connect = ssl3_connect,
179 .ssl_read = ssl3_read,
180 .ssl_peek = ssl3_peek,
181 .ssl_write = ssl3_write,
182 .ssl_shutdown = ssl3_shutdown,
183 .ssl_renegotiate = ssl3_renegotiate,
184 .ssl_renegotiate_check = ssl3_renegotiate_check,
185 .ssl_get_message = ssl3_get_message,
186 .ssl_read_bytes = ssl3_read_bytes,
187 .ssl_write_bytes = ssl3_write_bytes,
188 .ssl_dispatch_alert = ssl3_dispatch_alert,
189 .ssl_ctrl = ssl3_ctrl,
190 .ssl_ctx_ctrl = ssl3_ctx_ctrl,
191 .get_cipher_by_char = ssl3_get_cipher_by_char,
192 .put_cipher_by_char = ssl3_put_cipher_by_char,
193 .ssl_pending = ssl3_pending,
194 .num_ciphers = ssl3_num_ciphers,
195 .get_cipher = ssl3_get_cipher,
196 .get_ssl_method = ssl3_get_client_method,
197 .get_timeout = ssl3_default_timeout,
198 .ssl3_enc = &SSLv3_enc_data,
199 .ssl_version = ssl_undefined_void_function,
200 .ssl_callback_ctrl = ssl3_callback_ctrl,
201 .ssl_ctx_callback_ctrl = ssl3_ctx_callback_ctrl,
202};
203
204const SSL_METHOD *
205SSLv3_client_method(void)
206{
207 return &SSLv3_client_method_data;
208}
209
210static const SSL_METHOD *
211ssl3_get_client_method(int ver)
212{
213 if (ver == SSL3_VERSION)
214 return (SSLv3_client_method());
215 return (NULL);
216}
217
218int
219ssl3_connect(SSL *s)
220{
221 BUF_MEM *buf = NULL;
222 void (*cb)(const SSL *ssl, int type, int val) = NULL;
223 int ret = -1;
224 int new_state, state, skip = 0;
225
226 ERR_clear_error();
227 errno = 0;
228
229 if (s->info_callback != NULL)
230 cb = s->info_callback;
231 else if (s->ctx->info_callback != NULL)
232 cb = s->ctx->info_callback;
233
234 s->in_handshake++;
235 if (!SSL_in_init(s) || SSL_in_before(s))
236 SSL_clear(s);
237
238 for (;;) {
239 state = s->state;
240
241 switch (s->state) {
242 case SSL_ST_RENEGOTIATE:
243 s->renegotiate = 1;
244 s->state = SSL_ST_CONNECT;
245 s->ctx->stats.sess_connect_renegotiate++;
246 /* break */
247 case SSL_ST_BEFORE:
248 case SSL_ST_CONNECT:
249 case SSL_ST_BEFORE|SSL_ST_CONNECT:
250 case SSL_ST_OK|SSL_ST_CONNECT:
251
252 s->server = 0;
253 if (cb != NULL)
254 cb(s, SSL_CB_HANDSHAKE_START, 1);
255
256 if ((s->version & 0xff00 ) != 0x0300) {
257 SSLerr(SSL_F_SSL3_CONNECT,
258 ERR_R_INTERNAL_ERROR);
259 ret = -1;
260 goto end;
261 }
262
263 /* s->version=SSL3_VERSION; */
264 s->type = SSL_ST_CONNECT;
265
266 if (s->init_buf == NULL) {
267 if ((buf = BUF_MEM_new()) == NULL) {
268 ret = -1;
269 goto end;
270 }
271 if (!BUF_MEM_grow(buf,
272 SSL3_RT_MAX_PLAIN_LENGTH)) {
273 ret = -1;
274 goto end;
275 }
276 s->init_buf = buf;
277 buf = NULL;
278 }
279
280 if (!ssl3_setup_buffers(s)) {
281 ret = -1;
282 goto end;
283 }
284
285 /* setup buffing BIO */
286 if (!ssl_init_wbio_buffer(s, 0)) {
287 ret = -1;
288 goto end;
289 }
290
291 /* don't push the buffering BIO quite yet */
292
293 if (!ssl3_init_finished_mac(s)) {
294 ret = -1;
295 goto end;
296 }
297
298 s->state = SSL3_ST_CW_CLNT_HELLO_A;
299 s->ctx->stats.sess_connect++;
300 s->init_num = 0;
301 break;
302
303 case SSL3_ST_CW_CLNT_HELLO_A:
304 case SSL3_ST_CW_CLNT_HELLO_B:
305
306 s->shutdown = 0;
307 ret = ssl3_client_hello(s);
308 if (ret <= 0)
309 goto end;
310 s->state = SSL3_ST_CR_SRVR_HELLO_A;
311 s->init_num = 0;
312
313 /* turn on buffering for the next lot of output */
314 if (s->bbio != s->wbio)
315 s->wbio = BIO_push(s->bbio, s->wbio);
316
317 break;
318
319 case SSL3_ST_CR_SRVR_HELLO_A:
320 case SSL3_ST_CR_SRVR_HELLO_B:
321 ret = ssl3_get_server_hello(s);
322 if (ret <= 0)
323 goto end;
324
325 if (s->hit) {
326 s->state = SSL3_ST_CR_FINISHED_A;
327 if (s->tlsext_ticket_expected) {
328 /* receive renewed session ticket */
329 s->state = SSL3_ST_CR_SESSION_TICKET_A;
330 }
331 } else
332 s->state = SSL3_ST_CR_CERT_A;
333 s->init_num = 0;
334 break;
335
336 case SSL3_ST_CR_CERT_A:
337 case SSL3_ST_CR_CERT_B:
338 ret = ssl3_check_finished(s);
339 if (ret <= 0)
340 goto end;
341 if (ret == 2) {
342 s->hit = 1;
343 if (s->tlsext_ticket_expected)
344 s->state = SSL3_ST_CR_SESSION_TICKET_A;
345 else
346 s->state = SSL3_ST_CR_FINISHED_A;
347 s->init_num = 0;
348 break;
349 }
350 /* Check if it is anon DH/ECDH. */
351 if (!(s->s3->tmp.new_cipher->algorithm_auth &
352 SSL_aNULL)) {
353 ret = ssl3_get_server_certificate(s);
354 if (ret <= 0)
355 goto end;
356 if (s->tlsext_status_expected)
357 s->state = SSL3_ST_CR_CERT_STATUS_A;
358 else
359 s->state = SSL3_ST_CR_KEY_EXCH_A;
360 } else {
361 skip = 1;
362 s->state = SSL3_ST_CR_KEY_EXCH_A;
363 }
364 s->init_num = 0;
365 break;
366
367 case SSL3_ST_CR_KEY_EXCH_A:
368 case SSL3_ST_CR_KEY_EXCH_B:
369 ret = ssl3_get_key_exchange(s);
370 if (ret <= 0)
371 goto end;
372 s->state = SSL3_ST_CR_CERT_REQ_A;
373 s->init_num = 0;
374
375 /*
376 * At this point we check that we have the
377 * required stuff from the server.
378 */
379 if (!ssl3_check_cert_and_algorithm(s)) {
380 ret = -1;
381 goto end;
382 }
383 break;
384
385 case SSL3_ST_CR_CERT_REQ_A:
386 case SSL3_ST_CR_CERT_REQ_B:
387 ret = ssl3_get_certificate_request(s);
388 if (ret <= 0)
389 goto end;
390 s->state = SSL3_ST_CR_SRVR_DONE_A;
391 s->init_num = 0;
392 break;
393
394 case SSL3_ST_CR_SRVR_DONE_A:
395 case SSL3_ST_CR_SRVR_DONE_B:
396 ret = ssl3_get_server_done(s);
397 if (ret <= 0)
398 goto end;
399 if (s->s3->tmp.cert_req)
400 s->state = SSL3_ST_CW_CERT_A;
401 else
402 s->state = SSL3_ST_CW_KEY_EXCH_A;
403 s->init_num = 0;
404
405 break;
406
407 case SSL3_ST_CW_CERT_A:
408 case SSL3_ST_CW_CERT_B:
409 case SSL3_ST_CW_CERT_C:
410 case SSL3_ST_CW_CERT_D:
411 ret = ssl3_send_client_certificate(s);
412 if (ret <= 0)
413 goto end;
414 s->state = SSL3_ST_CW_KEY_EXCH_A;
415 s->init_num = 0;
416 break;
417
418 case SSL3_ST_CW_KEY_EXCH_A:
419 case SSL3_ST_CW_KEY_EXCH_B:
420 ret = ssl3_send_client_key_exchange(s);
421 if (ret <= 0)
422 goto end;
423 /*
424 * EAY EAY EAY need to check for DH fix cert
425 * sent back
426 */
427 /*
428 * For TLS, cert_req is set to 2, so a cert chain
429 * of nothing is sent, but no verify packet is sent
430 */
431 /*
432 * XXX: For now, we do not support client
433 * authentication in ECDH cipher suites with
434 * ECDH (rather than ECDSA) certificates.
435 * We need to skip the certificate verify
436 * message when client's ECDH public key is sent
437 * inside the client certificate.
438 */
439 if (s->s3->tmp.cert_req == 1) {
440 s->state = SSL3_ST_CW_CERT_VRFY_A;
441 } else {
442 s->state = SSL3_ST_CW_CHANGE_A;
443 s->s3->change_cipher_spec = 0;
444 }
445 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
446 s->state = SSL3_ST_CW_CHANGE_A;
447 s->s3->change_cipher_spec = 0;
448 }
449
450 s->init_num = 0;
451 break;
452
453 case SSL3_ST_CW_CERT_VRFY_A:
454 case SSL3_ST_CW_CERT_VRFY_B:
455 ret = ssl3_send_client_verify(s);
456 if (ret <= 0)
457 goto end;
458 s->state = SSL3_ST_CW_CHANGE_A;
459 s->init_num = 0;
460 s->s3->change_cipher_spec = 0;
461 break;
462
463 case SSL3_ST_CW_CHANGE_A:
464 case SSL3_ST_CW_CHANGE_B:
465 ret = ssl3_send_change_cipher_spec(s,
466 SSL3_ST_CW_CHANGE_A, SSL3_ST_CW_CHANGE_B);
467 if (ret <= 0)
468 goto end;
469
470 if (s->s3->next_proto_neg_seen)
471 s->state = SSL3_ST_CW_NEXT_PROTO_A;
472 else
473 s->state = SSL3_ST_CW_FINISHED_A;
474 s->init_num = 0;
475
476 s->session->cipher = s->s3->tmp.new_cipher;
477 if (!s->method->ssl3_enc->setup_key_block(s)) {
478 ret = -1;
479 goto end;
480 }
481
482 if (!s->method->ssl3_enc->change_cipher_state(s,
483 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) {
484 ret = -1;
485 goto end;
486 }
487
488 break;
489
490 case SSL3_ST_CW_NEXT_PROTO_A:
491 case SSL3_ST_CW_NEXT_PROTO_B:
492 ret = ssl3_send_next_proto(s);
493 if (ret <= 0)
494 goto end;
495 s->state = SSL3_ST_CW_FINISHED_A;
496 break;
497
498 case SSL3_ST_CW_FINISHED_A:
499 case SSL3_ST_CW_FINISHED_B:
500 ret = ssl3_send_finished(s, SSL3_ST_CW_FINISHED_A,
501 SSL3_ST_CW_FINISHED_B,
502 s->method->ssl3_enc->client_finished_label,
503 s->method->ssl3_enc->client_finished_label_len);
504 if (ret <= 0)
505 goto end;
506 s->s3->flags |= SSL3_FLAGS_CCS_OK;
507 s->state = SSL3_ST_CW_FLUSH;
508
509 /* clear flags */
510 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
511 if (s->hit) {
512 s->s3->tmp.next_state = SSL_ST_OK;
513 if (s->s3->flags &
514 SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
515 s->state = SSL_ST_OK;
516 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
517 s->s3->delay_buf_pop_ret = 0;
518 }
519 } else {
520 /* Allow NewSessionTicket if ticket expected */
521 if (s->tlsext_ticket_expected)
522 s->s3->tmp.next_state =
523 SSL3_ST_CR_SESSION_TICKET_A;
524 else
525
526 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
527 }
528 s->init_num = 0;
529 break;
530
531 case SSL3_ST_CR_SESSION_TICKET_A:
532 case SSL3_ST_CR_SESSION_TICKET_B:
533 ret = ssl3_get_new_session_ticket(s);
534 if (ret <= 0)
535 goto end;
536 s->state = SSL3_ST_CR_FINISHED_A;
537 s->init_num = 0;
538 break;
539
540 case SSL3_ST_CR_CERT_STATUS_A:
541 case SSL3_ST_CR_CERT_STATUS_B:
542 ret = ssl3_get_cert_status(s);
543 if (ret <= 0)
544 goto end;
545 s->state = SSL3_ST_CR_KEY_EXCH_A;
546 s->init_num = 0;
547 break;
548
549 case SSL3_ST_CR_FINISHED_A:
550 case SSL3_ST_CR_FINISHED_B:
551 s->s3->flags |= SSL3_FLAGS_CCS_OK;
552 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
553 SSL3_ST_CR_FINISHED_B);
554 if (ret <= 0)
555 goto end;
556
557 if (s->hit)
558 s->state = SSL3_ST_CW_CHANGE_A;
559 else
560 s->state = SSL_ST_OK;
561 s->init_num = 0;
562 break;
563
564 case SSL3_ST_CW_FLUSH:
565 s->rwstate = SSL_WRITING;
566 if (BIO_flush(s->wbio) <= 0) {
567 ret = -1;
568 goto end;
569 }
570 s->rwstate = SSL_NOTHING;
571 s->state = s->s3->tmp.next_state;
572 break;
573
574 case SSL_ST_OK:
575 /* clean a few things up */
576 ssl3_cleanup_key_block(s);
577
578 if (s->init_buf != NULL) {
579 BUF_MEM_free(s->init_buf);
580 s->init_buf = NULL;
581 }
582
583 /*
584 * If we are not 'joining' the last two packets,
585 * remove the buffering now
586 */
587 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
588 ssl_free_wbio_buffer(s);
589 /* else do it later in ssl3_write */
590
591 s->init_num = 0;
592 s->renegotiate = 0;
593 s->new_session = 0;
594
595 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
596 if (s->hit)
597 s->ctx->stats.sess_hit++;
598
599 ret = 1;
600 /* s->server=0; */
601 s->handshake_func = ssl3_connect;
602 s->ctx->stats.sess_connect_good++;
603
604 if (cb != NULL)
605 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
606
607 goto end;
608 /* break; */
609
610 default:
611 SSLerr(SSL_F_SSL3_CONNECT,
612 SSL_R_UNKNOWN_STATE);
613 ret = -1;
614 goto end;
615 /* break; */
616 }
617
618 /* did we do anything */
619 if (!s->s3->tmp.reuse_message && !skip) {
620 if (s->debug) {
621 if ((ret = BIO_flush(s->wbio)) <= 0)
622 goto end;
623 }
624
625 if ((cb != NULL) && (s->state != state)) {
626 new_state = s->state;
627 s->state = state;
628 cb(s, SSL_CB_CONNECT_LOOP, 1);
629 s->state = new_state;
630 }
631 }
632 skip = 0;
633 }
634end:
635 s->in_handshake--;
636 if (buf != NULL)
637 BUF_MEM_free(buf);
638 if (cb != NULL)
639 cb(s, SSL_CB_CONNECT_EXIT, ret);
640 return (ret);
641}
642
643
644int
645ssl3_client_hello(SSL *s)
646{
647 unsigned char *bufend, *p, *d;
648 int i;
649
650 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
651 SSL_SESSION *sess = s->session;
652
653 if ((sess == NULL) ||
654 (sess->ssl_version != s->version) ||
655 (!sess->session_id_length && !sess->tlsext_tick) ||
656 (sess->not_resumable)) {
657 if (!ssl_get_new_session(s, 0))
658 goto err;
659 }
660 /* else use the pre-loaded session */
661
662 arc4random_buf(s->s3->client_random, SSL3_RANDOM_SIZE);
663
664 d = p = ssl3_handshake_msg_start(s, SSL3_MT_CLIENT_HELLO);
665
666 /*
667 * Version indicates the negotiated version: for example from
668 * an SSLv2/v3 compatible client hello). The client_version
669 * field is the maximum version we permit and it is also
670 * used in RSA encrypted premaster secrets. Some servers can
671 * choke if we initially report a higher version then
672 * renegotiate to a lower one in the premaster secret. This
673 * didn't happen with TLS 1.0 as most servers supported it
674 * but it can with TLS 1.1 or later if the server only supports
675 * 1.0.
676 *
677 * Possible scenario with previous logic:
678 * 1. Client hello indicates TLS 1.2
679 * 2. Server hello says TLS 1.0
680 * 3. RSA encrypted premaster secret uses 1.2.
681 * 4. Handhaked proceeds using TLS 1.0.
682 * 5. Server sends hello request to renegotiate.
683 * 6. Client hello indicates TLS v1.0 as we now
684 * know that is maximum server supports.
685 * 7. Server chokes on RSA encrypted premaster secret
686 * containing version 1.0.
687 *
688 * For interoperability it should be OK to always use the
689 * maximum version we support in client hello and then rely
690 * on the checking of version to ensure the servers isn't
691 * being inconsistent: for example initially negotiating with
692 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
693 * client_version in client hello and not resetting it to
694 * the negotiated version.
695 */
696 *(p++) = s->client_version >> 8;
697 *(p++) = s->client_version & 0xff;
698
699 /* Random stuff */
700 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
701 p += SSL3_RANDOM_SIZE;
702
703 /* Session ID */
704 if (s->new_session)
705 i = 0;
706 else
707 i = s->session->session_id_length;
708 *(p++) = i;
709 if (i != 0) {
710 if (i > (int)sizeof(s->session->session_id)) {
711 SSLerr(SSL_F_SSL3_CLIENT_HELLO,
712 ERR_R_INTERNAL_ERROR);
713 goto err;
714 }
715 memcpy(p, s->session->session_id, i);
716 p += i;
717 }
718
719 /* Ciphers supported */
720 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &p[2]);
721 if (i == 0) {
722 SSLerr(SSL_F_SSL3_CLIENT_HELLO,
723 SSL_R_NO_CIPHERS_AVAILABLE);
724 goto err;
725 }
726#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
727 /*
728 * Some servers hang if client hello > 256 bytes
729 * as hack workaround chop number of supported ciphers
730 * to keep it well below this if we use TLS v1.2
731 */
732 if (TLS1_get_version(s) >= TLS1_2_VERSION &&
733 i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
734 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
735#endif
736 s2n(i, p);
737 p += i;
738
739 /* add in (no) COMPRESSION */
740 *(p++) = 1;
741 *(p++) = 0; /* Add the NULL method */
742
743 /* TLS extensions*/
744 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
745 SSLerr(SSL_F_SSL3_CLIENT_HELLO,
746 SSL_R_CLIENTHELLO_TLSEXT);
747 goto err;
748 }
749 bufend = (unsigned char *)s->init_buf->data +
750 SSL3_RT_MAX_PLAIN_LENGTH;
751 if ((p = ssl_add_clienthello_tlsext(s, p, bufend)) == NULL) {
752 SSLerr(SSL_F_SSL3_CLIENT_HELLO,
753 ERR_R_INTERNAL_ERROR);
754 goto err;
755 }
756
757 s->state = SSL3_ST_CW_CLNT_HELLO_B;
758
759 ssl3_handshake_msg_finish(s, p - d);
760 }
761
762 /* SSL3_ST_CW_CLNT_HELLO_B */
763 return (ssl3_handshake_write(s));
764
765err:
766 return (-1);
767}
768
769int
770ssl3_get_server_hello(SSL *s)
771{
772 STACK_OF(SSL_CIPHER) *sk;
773 const SSL_CIPHER *c;
774 unsigned char *p, *q, *d;
775 int i, al, ok;
776 unsigned int j;
777 uint16_t cipher_value;
778 long n;
779 unsigned long alg_k;
780
781 n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_HELLO_A,
782 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, /* ?? */ &ok);
783
784 if (!ok)
785 return ((int)n);
786
787 if (SSL_IS_DTLS(s)) {
788 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
789 if (s->d1->send_cookie == 0) {
790 s->s3->tmp.reuse_message = 1;
791 return (1);
792 } else {
793 /* Already sent a cookie. */
794 al = SSL_AD_UNEXPECTED_MESSAGE;
795 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
796 SSL_R_BAD_MESSAGE_TYPE);
797 goto f_err;
798 }
799 }
800 }
801
802 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
803 al = SSL_AD_UNEXPECTED_MESSAGE;
804 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
805 SSL_R_BAD_MESSAGE_TYPE);
806 goto f_err;
807 }
808
809 d = p = (unsigned char *)s->init_msg;
810
811 if (2 > n)
812 goto truncated;
813 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
814 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
815 s->version = (s->version&0xff00) | p[1];
816 al = SSL_AD_PROTOCOL_VERSION;
817 goto f_err;
818 }
819 p += 2;
820
821 /* load the server hello data */
822
823 if (p + SSL3_RANDOM_SIZE + 1 - d > n)
824 goto truncated;
825
826 /* load the server random */
827 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
828 p += SSL3_RANDOM_SIZE;
829
830 /* get the session-id */
831 j = *(p++);
832
833 if ((j > sizeof s->session->session_id) ||
834 (j > SSL3_SESSION_ID_SIZE)) {
835 al = SSL_AD_ILLEGAL_PARAMETER;
836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
837 SSL_R_SSL3_SESSION_ID_TOO_LONG);
838 goto f_err;
839 }
840
841 if (p + j + 2 - d > n)
842 goto truncated;
843
844 /* Get the cipher value. */
845 q = p + j;
846 n2s(q, cipher_value);
847
848 /*
849 * Check if we want to resume the session based on external
850 * pre-shared secret
851 */
852 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
853 SSL_CIPHER *pref_cipher = NULL;
854 s->session->master_key_length = sizeof(s->session->master_key);
855 if (s->tls_session_secret_cb(s, s->session->master_key,
856 &s->session->master_key_length, NULL, &pref_cipher,
857 s->tls_session_secret_cb_arg)) {
858 s->session->cipher = pref_cipher ? pref_cipher :
859 ssl3_get_cipher_by_value(cipher_value);
860 s->s3->flags |= SSL3_FLAGS_CCS_OK;
861 }
862 }
863
864 if (j != 0 && j == s->session->session_id_length &&
865 timingsafe_memcmp(p, s->session->session_id, j) == 0) {
866 if (s->sid_ctx_length != s->session->sid_ctx_length ||
867 timingsafe_memcmp(s->session->sid_ctx,
868 s->sid_ctx, s->sid_ctx_length) != 0) {
869 /* actually a client application bug */
870 al = SSL_AD_ILLEGAL_PARAMETER;
871 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
872 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
873 goto f_err;
874 }
875 s->s3->flags |= SSL3_FLAGS_CCS_OK;
876 s->hit = 1;
877 } else {
878 /* a miss or crap from the other end */
879
880 /* If we were trying for session-id reuse, make a new
881 * SSL_SESSION so we don't stuff up other people */
882 s->hit = 0;
883 if (s->session->session_id_length > 0) {
884 if (!ssl_get_new_session(s, 0)) {
885 al = SSL_AD_INTERNAL_ERROR;
886 goto f_err;
887 }
888 }
889 s->session->session_id_length = j;
890 memcpy(s->session->session_id, p, j); /* j could be 0 */
891 }
892 p += j;
893
894 if ((c = ssl3_get_cipher_by_value(cipher_value)) == NULL) {
895 /* unknown cipher */
896 al = SSL_AD_ILLEGAL_PARAMETER;
897 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
898 SSL_R_UNKNOWN_CIPHER_RETURNED);
899 goto f_err;
900 }
901
902 /* TLS v1.2 only ciphersuites require v1.2 or later */
903 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
904 (TLS1_get_version(s) < TLS1_2_VERSION)) {
905 al = SSL_AD_ILLEGAL_PARAMETER;
906 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
907 SSL_R_WRONG_CIPHER_RETURNED);
908 goto f_err;
909 }
910 p += SSL3_CIPHER_VALUE_SIZE;
911
912 sk = ssl_get_ciphers_by_id(s);
913 i = sk_SSL_CIPHER_find(sk, c);
914 if (i < 0) {
915 /* we did not say we would use this cipher */
916 al = SSL_AD_ILLEGAL_PARAMETER;
917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
918 SSL_R_WRONG_CIPHER_RETURNED);
919 goto f_err;
920 }
921
922 /*
923 * Depending on the session caching (internal/external), the cipher
924 * and/or cipher_id values may not be set. Make sure that
925 * cipher_id is set and use it for comparison.
926 */
927 if (s->session->cipher)
928 s->session->cipher_id = s->session->cipher->id;
929 if (s->hit && (s->session->cipher_id != c->id)) {
930 al = SSL_AD_ILLEGAL_PARAMETER;
931 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
932 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
933 goto f_err;
934 }
935 s->s3->tmp.new_cipher = c;
936 /*
937 * Don't digest cached records if no sigalgs: we may need them for
938 * client authentication.
939 */
940 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
941 if (!(SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST)) &&
942 !ssl3_digest_cached_records(s)) {
943 al = SSL_AD_INTERNAL_ERROR;
944 goto f_err;
945 }
946 /* lets get the compression algorithm */
947 /* COMPRESSION */
948 if (p + 1 - d > n)
949 goto truncated;
950 if (*(p++) != 0) {
951 al = SSL_AD_ILLEGAL_PARAMETER;
952 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
953 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
954 goto f_err;
955 }
956
957 /* TLS extensions*/
958 if (s->version >= SSL3_VERSION) {
959 if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) {
960 /* 'al' set by ssl_parse_serverhello_tlsext */
961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
962 SSL_R_PARSE_TLSEXT);
963 goto f_err;
964
965 }
966 if (ssl_check_serverhello_tlsext(s) <= 0) {
967 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
968 SSL_R_SERVERHELLO_TLSEXT);
969 goto err;
970 }
971 }
972
973 if (p != d + n)
974 goto truncated;
975
976 return (1);
977
978truncated:
979 /* wrong packet length */
980 al = SSL_AD_DECODE_ERROR;
981 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
982f_err:
983 ssl3_send_alert(s, SSL3_AL_FATAL, al);
984err:
985 return (-1);
986}
987
988int
989ssl3_get_server_certificate(SSL *s)
990{
991 int al, i, ok, ret = -1;
992 unsigned long n, nc, llen, l;
993 X509 *x = NULL;
994 const unsigned char *q, *p;
995 unsigned char *d;
996 STACK_OF(X509) *sk = NULL;
997 SESS_CERT *sc;
998 EVP_PKEY *pkey = NULL;
999
1000 n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_A,
1001 SSL3_ST_CR_CERT_B, -1, s->max_cert_list, &ok);
1002
1003 if (!ok)
1004 return ((int)n);
1005
1006 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1007 s->s3->tmp.reuse_message = 1;
1008 return (1);
1009 }
1010
1011 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1012 al = SSL_AD_UNEXPECTED_MESSAGE;
1013 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1014 SSL_R_BAD_MESSAGE_TYPE);
1015 goto f_err;
1016 }
1017 p = d = (unsigned char *)s->init_msg;
1018
1019 if ((sk = sk_X509_new_null()) == NULL) {
1020 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1021 ERR_R_MALLOC_FAILURE);
1022 goto err;
1023 }
1024
1025 if (p + 3 - d > n)
1026 goto truncated;
1027 n2l3(p, llen);
1028 if (llen + 3 != n) {
1029 al = SSL_AD_DECODE_ERROR;
1030 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1031 SSL_R_LENGTH_MISMATCH);
1032 goto f_err;
1033 }
1034 for (nc = 0; nc < llen; ) {
1035 if (p + 3 - d > n)
1036 goto truncated;
1037 n2l3(p, l);
1038 if ((l + nc + 3) > llen) {
1039 al = SSL_AD_DECODE_ERROR;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1041 SSL_R_CERT_LENGTH_MISMATCH);
1042 goto f_err;
1043 }
1044
1045 q = p;
1046 x = d2i_X509(NULL, &q, l);
1047 if (x == NULL) {
1048 al = SSL_AD_BAD_CERTIFICATE;
1049 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1050 ERR_R_ASN1_LIB);
1051 goto f_err;
1052 }
1053 if (q != (p + l)) {
1054 al = SSL_AD_DECODE_ERROR;
1055 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1056 SSL_R_CERT_LENGTH_MISMATCH);
1057 goto f_err;
1058 }
1059 if (!sk_X509_push(sk, x)) {
1060 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1061 ERR_R_MALLOC_FAILURE);
1062 goto err;
1063 }
1064 x = NULL;
1065 nc += l + 3;
1066 p = q;
1067 }
1068
1069 i = ssl_verify_cert_chain(s, sk);
1070 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) {
1071 al = ssl_verify_alarm_type(s->verify_result);
1072 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1073 SSL_R_CERTIFICATE_VERIFY_FAILED);
1074 goto f_err;
1075
1076 }
1077 ERR_clear_error(); /* but we keep s->verify_result */
1078
1079 sc = ssl_sess_cert_new();
1080 if (sc == NULL)
1081 goto err;
1082 if (s->session->sess_cert)
1083 ssl_sess_cert_free(s->session->sess_cert);
1084 s->session->sess_cert = sc;
1085
1086 sc->cert_chain = sk;
1087 /*
1088 * Inconsistency alert: cert_chain does include the peer's
1089 * certificate, which we don't include in s3_srvr.c
1090 */
1091 x = sk_X509_value(sk, 0);
1092 sk = NULL;
1093 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1094
1095 pkey = X509_get_pubkey(x);
1096
1097 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1098 x = NULL;
1099 al = SSL3_AL_FATAL;
1100 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1101 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1102 goto f_err;
1103 }
1104
1105 i = ssl_cert_type(x, pkey);
1106 if (i < 0) {
1107 x = NULL;
1108 al = SSL3_AL_FATAL;
1109 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1110 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1111 goto f_err;
1112 }
1113
1114 sc->peer_cert_type = i;
1115 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1116 /*
1117 * Why would the following ever happen?
1118 * We just created sc a couple of lines ago.
1119 */
1120 if (sc->peer_pkeys[i].x509 != NULL)
1121 X509_free(sc->peer_pkeys[i].x509);
1122 sc->peer_pkeys[i].x509 = x;
1123 sc->peer_key = &(sc->peer_pkeys[i]);
1124
1125 if (s->session->peer != NULL)
1126 X509_free(s->session->peer);
1127 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1128 s->session->peer = x;
1129 s->session->verify_result = s->verify_result;
1130
1131 x = NULL;
1132 ret = 1;
1133
1134 if (0) {
1135truncated:
1136 /* wrong packet length */
1137 al = SSL_AD_DECODE_ERROR;
1138 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1139 SSL_R_BAD_PACKET_LENGTH);
1140f_err:
1141 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1142 }
1143err:
1144 EVP_PKEY_free(pkey);
1145 X509_free(x);
1146 sk_X509_pop_free(sk, X509_free);
1147 return (ret);
1148}
1149
1150int
1151ssl3_get_key_exchange(SSL *s)
1152{
1153 unsigned char *q, md_buf[EVP_MAX_MD_SIZE*2];
1154 EVP_MD_CTX md_ctx;
1155 unsigned char *param, *p;
1156 int al, i, j, param_len, ok;
1157 long n, alg_k, alg_a;
1158 EVP_PKEY *pkey = NULL;
1159 const EVP_MD *md = NULL;
1160 RSA *rsa = NULL;
1161 DH *dh = NULL;
1162 EC_KEY *ecdh = NULL;
1163 BN_CTX *bn_ctx = NULL;
1164 EC_POINT *srvr_ecpoint = NULL;
1165 int curve_nid = 0;
1166 int encoded_pt_len = 0;
1167
1168 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1169 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1170
1171 EVP_MD_CTX_init(&md_ctx);
1172
1173 /*
1174 * Use same message size as in ssl3_get_certificate_request()
1175 * as ServerKeyExchange message may be skipped.
1176 */
1177 n = s->method->ssl_get_message(s, SSL3_ST_CR_KEY_EXCH_A,
1178 SSL3_ST_CR_KEY_EXCH_B, -1, s->max_cert_list, &ok);
1179 if (!ok)
1180 return ((int)n);
1181
1182 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1183 /*
1184 * Do not skip server key exchange if this cipher suite uses
1185 * ephemeral keys.
1186 */
1187 if (alg_k & (SSL_kDHE|SSL_kECDHE)) {
1188 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1189 SSL_R_UNEXPECTED_MESSAGE);
1190 al = SSL_AD_UNEXPECTED_MESSAGE;
1191 goto f_err;
1192 }
1193
1194 s->s3->tmp.reuse_message = 1;
1195 return (1);
1196 }
1197
1198 if (s->session->sess_cert != NULL) {
1199 DH_free(s->session->sess_cert->peer_dh_tmp);
1200 s->session->sess_cert->peer_dh_tmp = NULL;
1201
1202 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1203 s->session->sess_cert->peer_ecdh_tmp = NULL;
1204 } else {
1205 s->session->sess_cert = ssl_sess_cert_new();
1206 if (s->session->sess_cert == NULL)
1207 goto err;
1208 }
1209
1210 param = p = (unsigned char *)s->init_msg;
1211 param_len = 0;
1212
1213 if (alg_k & SSL_kDHE) {
1214 if ((dh = DH_new()) == NULL) {
1215 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1216 ERR_R_DH_LIB);
1217 goto err;
1218 }
1219 if (2 > n)
1220 goto truncated;
1221 n2s(p, i);
1222 param_len = i + 2;
1223 if (param_len > n) {
1224 al = SSL_AD_DECODE_ERROR;
1225 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1226 SSL_R_BAD_DH_P_LENGTH);
1227 goto f_err;
1228 }
1229 if (!(dh->p = BN_bin2bn(p, i, NULL))) {
1230 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1231 ERR_R_BN_LIB);
1232 goto err;
1233 }
1234 p += i;
1235
1236 if (param_len + 2 > n)
1237 goto truncated;
1238 n2s(p, i);
1239 param_len += i + 2;
1240 if (param_len > n) {
1241 al = SSL_AD_DECODE_ERROR;
1242 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1243 SSL_R_BAD_DH_G_LENGTH);
1244 goto f_err;
1245 }
1246 if (!(dh->g = BN_bin2bn(p, i, NULL))) {
1247 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1248 ERR_R_BN_LIB);
1249 goto err;
1250 }
1251 p += i;
1252
1253 if (param_len + 2 > n)
1254 goto truncated;
1255 n2s(p, i);
1256 param_len += i + 2;
1257 if (param_len > n) {
1258 al = SSL_AD_DECODE_ERROR;
1259 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1260 SSL_R_BAD_DH_PUB_KEY_LENGTH);
1261 goto f_err;
1262 }
1263 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) {
1264 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1265 ERR_R_BN_LIB);
1266 goto err;
1267 }
1268 p += i;
1269 n -= param_len;
1270
1271 /*
1272 * Check the strength of the DH key just constructed.
1273 * Discard keys weaker than 1024 bits.
1274 */
1275
1276 if (DH_size(dh) < 1024 / 8) {
1277 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1278 SSL_R_BAD_DH_P_LENGTH);
1279 goto err;
1280 }
1281
1282 if (alg_a & SSL_aRSA)
1283 pkey = X509_get_pubkey(
1284 s->session->sess_cert->peer_pkeys[
1285 SSL_PKEY_RSA_ENC].x509);
1286 else if (alg_a & SSL_aDSS)
1287 pkey = X509_get_pubkey(
1288 s->session->sess_cert->peer_pkeys[
1289 SSL_PKEY_DSA_SIGN].x509);
1290 /* else anonymous DH, so no certificate or pkey. */
1291
1292 s->session->sess_cert->peer_dh_tmp = dh;
1293 dh = NULL;
1294 } else if (alg_k & SSL_kECDHE) {
1295 const EC_GROUP *group;
1296 EC_GROUP *ngroup;
1297
1298 if ((ecdh = EC_KEY_new()) == NULL) {
1299 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1300 ERR_R_MALLOC_FAILURE);
1301 goto err;
1302 }
1303
1304 /*
1305 * Extract elliptic curve parameters and the
1306 * server's ephemeral ECDH public key.
1307 * Keep accumulating lengths of various components in
1308 * param_len and make sure it never exceeds n.
1309 */
1310
1311 /*
1312 * XXX: For now we only support named (not generic) curves
1313 * and the ECParameters in this case is just three bytes.
1314 */
1315 param_len = 3;
1316 if (param_len > n) {
1317 al = SSL_AD_DECODE_ERROR;
1318 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1319 SSL_R_LENGTH_TOO_SHORT);
1320 goto f_err;
1321 }
1322
1323 /*
1324 * Check curve is one of our preferences, if not server has
1325 * sent an invalid curve.
1326 */
1327 if (tls1_check_curve(s, p, param_len) != 1) {
1328 al = SSL_AD_DECODE_ERROR;
1329 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1330 goto f_err;
1331 }
1332
1333 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) {
1334 al = SSL_AD_INTERNAL_ERROR;
1335 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1336 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1337 goto f_err;
1338 }
1339
1340 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1341 if (ngroup == NULL) {
1342 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1343 ERR_R_EC_LIB);
1344 goto err;
1345 }
1346 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1347 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1348 ERR_R_EC_LIB);
1349 goto err;
1350 }
1351 EC_GROUP_free(ngroup);
1352
1353 group = EC_KEY_get0_group(ecdh);
1354
1355 p += 3;
1356
1357 /* Next, get the encoded ECPoint */
1358 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1359 ((bn_ctx = BN_CTX_new()) == NULL)) {
1360 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1361 ERR_R_MALLOC_FAILURE);
1362 goto err;
1363 }
1364
1365 if (param_len + 1 > n)
1366 goto truncated;
1367 encoded_pt_len = *p;
1368 /* length of encoded point */
1369 p += 1;
1370 param_len += (1 + encoded_pt_len);
1371 if ((param_len > n) || (EC_POINT_oct2point(group, srvr_ecpoint,
1372 p, encoded_pt_len, bn_ctx) == 0)) {
1373 al = SSL_AD_DECODE_ERROR;
1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1375 SSL_R_BAD_ECPOINT);
1376 goto f_err;
1377 }
1378
1379 n -= param_len;
1380 p += encoded_pt_len;
1381
1382 /*
1383 * The ECC/TLS specification does not mention the use
1384 * of DSA to sign ECParameters in the server key
1385 * exchange message. We do support RSA and ECDSA.
1386 */
1387 if (alg_a & SSL_aRSA)
1388 pkey = X509_get_pubkey(
1389 s->session->sess_cert->peer_pkeys[
1390 SSL_PKEY_RSA_ENC].x509);
1391 else if (alg_a & SSL_aECDSA)
1392 pkey = X509_get_pubkey(
1393 s->session->sess_cert->peer_pkeys[
1394 SSL_PKEY_ECC].x509);
1395 /* Else anonymous ECDH, so no certificate or pkey. */
1396 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1397 s->session->sess_cert->peer_ecdh_tmp = ecdh;
1398 ecdh = NULL;
1399 BN_CTX_free(bn_ctx);
1400 bn_ctx = NULL;
1401 EC_POINT_free(srvr_ecpoint);
1402 srvr_ecpoint = NULL;
1403 } else if (alg_k) {
1404 al = SSL_AD_UNEXPECTED_MESSAGE;
1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1406 SSL_R_UNEXPECTED_MESSAGE);
1407 goto f_err;
1408 }
1409
1410 /* p points to the next byte, there are 'n' bytes left */
1411
1412 /* if it was signed, check the signature */
1413 if (pkey != NULL) {
1414 if (SSL_USE_SIGALGS(s)) {
1415 int sigalg = tls12_get_sigid(pkey);
1416 /* Should never happen */
1417 if (sigalg == -1) {
1418 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1419 ERR_R_INTERNAL_ERROR);
1420 goto err;
1421 }
1422 /*
1423 * Check key type is consistent
1424 * with signature
1425 */
1426 if (2 > n)
1427 goto truncated;
1428 if (sigalg != (int)p[1]) {
1429 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1430 SSL_R_WRONG_SIGNATURE_TYPE);
1431 al = SSL_AD_DECODE_ERROR;
1432 goto f_err;
1433 }
1434 md = tls12_get_hash(p[0]);
1435 if (md == NULL) {
1436 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1437 SSL_R_UNKNOWN_DIGEST);
1438 al = SSL_AD_DECODE_ERROR;
1439 goto f_err;
1440 }
1441 p += 2;
1442 n -= 2;
1443 } else
1444 md = EVP_sha1();
1445
1446 if (2 > n)
1447 goto truncated;
1448 n2s(p, i);
1449 n -= 2;
1450 j = EVP_PKEY_size(pkey);
1451
1452 if (i != n || n > j) {
1453 /* wrong packet length */
1454 al = SSL_AD_DECODE_ERROR;
1455 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1456 SSL_R_WRONG_SIGNATURE_LENGTH);
1457 goto f_err;
1458 }
1459
1460 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1461 int num;
1462
1463 j = 0;
1464 q = md_buf;
1465 for (num = 2; num > 0; num--) {
1466 if (!EVP_DigestInit_ex(&md_ctx,
1467 (num == 2) ? s->ctx->md5 : s->ctx->sha1,
1468 NULL)) {
1469 al = SSL_AD_INTERNAL_ERROR;
1470 goto f_err;
1471 }
1472 EVP_DigestUpdate(&md_ctx,
1473 s->s3->client_random,
1474 SSL3_RANDOM_SIZE);
1475 EVP_DigestUpdate(&md_ctx,
1476 s->s3->server_random,
1477 SSL3_RANDOM_SIZE);
1478 EVP_DigestUpdate(&md_ctx, param, param_len);
1479 EVP_DigestFinal_ex(&md_ctx, q,
1480 (unsigned int *)&i);
1481 q += i;
1482 j += i;
1483 }
1484 i = RSA_verify(NID_md5_sha1, md_buf, j,
1485 p, n, pkey->pkey.rsa);
1486 if (i < 0) {
1487 al = SSL_AD_DECRYPT_ERROR;
1488 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1489 SSL_R_BAD_RSA_DECRYPT);
1490 goto f_err;
1491 }
1492 if (i == 0) {
1493 /* bad signature */
1494 al = SSL_AD_DECRYPT_ERROR;
1495 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1496 SSL_R_BAD_SIGNATURE);
1497 goto f_err;
1498 }
1499 } else {
1500 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1501 EVP_VerifyUpdate(&md_ctx, s->s3->client_random,
1502 SSL3_RANDOM_SIZE);
1503 EVP_VerifyUpdate(&md_ctx, s->s3->server_random,
1504 SSL3_RANDOM_SIZE);
1505 EVP_VerifyUpdate(&md_ctx, param, param_len);
1506 if (EVP_VerifyFinal(&md_ctx, p,(int)n, pkey) <= 0) {
1507 /* bad signature */
1508 al = SSL_AD_DECRYPT_ERROR;
1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1510 SSL_R_BAD_SIGNATURE);
1511 goto f_err;
1512 }
1513 }
1514 } else {
1515 /* aNULL does not need public keys. */
1516 if (!(alg_a & SSL_aNULL)) {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1518 ERR_R_INTERNAL_ERROR);
1519 goto err;
1520 }
1521 /* still data left over */
1522 if (n != 0) {
1523 al = SSL_AD_DECODE_ERROR;
1524 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1525 SSL_R_EXTRA_DATA_IN_MESSAGE);
1526 goto f_err;
1527 }
1528 }
1529 EVP_PKEY_free(pkey);
1530 EVP_MD_CTX_cleanup(&md_ctx);
1531 return (1);
1532truncated:
1533 /* wrong packet length */
1534 al = SSL_AD_DECODE_ERROR;
1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_PACKET_LENGTH);
1536f_err:
1537 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1538err:
1539 EVP_PKEY_free(pkey);
1540 RSA_free(rsa);
1541 DH_free(dh);
1542 BN_CTX_free(bn_ctx);
1543 EC_POINT_free(srvr_ecpoint);
1544 EC_KEY_free(ecdh);
1545 EVP_MD_CTX_cleanup(&md_ctx);
1546 return (-1);
1547}
1548
1549int
1550ssl3_get_certificate_request(SSL *s)
1551{
1552 int ok, ret = 0;
1553 unsigned long n, nc, l;
1554 unsigned int llen, ctype_num, i;
1555 X509_NAME *xn = NULL;
1556 const unsigned char *p, *q;
1557 unsigned char *d;
1558 STACK_OF(X509_NAME) *ca_sk = NULL;
1559
1560 n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_REQ_A,
1561 SSL3_ST_CR_CERT_REQ_B, -1, s->max_cert_list, &ok);
1562
1563 if (!ok)
1564 return ((int)n);
1565
1566 s->s3->tmp.cert_req = 0;
1567
1568 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1569 s->s3->tmp.reuse_message = 1;
1570 /*
1571 * If we get here we don't need any cached handshake records
1572 * as we wont be doing client auth.
1573 */
1574 if (s->s3->handshake_buffer) {
1575 if (!ssl3_digest_cached_records(s))
1576 goto err;
1577 }
1578 return (1);
1579 }
1580
1581 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1582 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1583 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1584 SSL_R_WRONG_MESSAGE_TYPE);
1585 goto err;
1586 }
1587
1588 /* TLS does not like anon-DH with client cert */
1589 if (s->version > SSL3_VERSION) {
1590 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
1591 ssl3_send_alert(s, SSL3_AL_FATAL,
1592 SSL_AD_UNEXPECTED_MESSAGE);
1593 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1594 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1595 goto err;
1596 }
1597 }
1598
1599 p = d = (unsigned char *)s->init_msg;
1600
1601 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1602 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1603 ERR_R_MALLOC_FAILURE);
1604 goto err;
1605 }
1606
1607 /* get the certificate types */
1608 if (1 > n)
1609 goto truncated;
1610 ctype_num= *(p++);
1611 if (ctype_num > SSL3_CT_NUMBER)
1612 ctype_num = SSL3_CT_NUMBER;
1613 if (p + ctype_num - d > n) {
1614 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1615 SSL_R_DATA_LENGTH_TOO_LONG);
1616 goto err;
1617 }
1618
1619 for (i = 0; i < ctype_num; i++)
1620 s->s3->tmp.ctype[i] = p[i];
1621 p += ctype_num;
1622 if (SSL_USE_SIGALGS(s)) {
1623 if (p + 2 - d > n) {
1624 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1625 SSL_R_DATA_LENGTH_TOO_LONG);
1626 goto err;
1627 }
1628 n2s(p, llen);
1629 /* Check we have enough room for signature algorithms and
1630 * following length value.
1631 */
1632 if ((unsigned long)(p - d + llen + 2) > n) {
1633 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1634 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1635 SSL_R_DATA_LENGTH_TOO_LONG);
1636 goto err;
1637 }
1638 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) {
1639 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1640 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1641 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1642 goto err;
1643 }
1644 p += llen;
1645 }
1646
1647 /* get the CA RDNs */
1648 if (p + 2 - d > n) {
1649 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1650 SSL_R_DATA_LENGTH_TOO_LONG);
1651 goto err;
1652 }
1653 n2s(p, llen);
1654
1655 if ((unsigned long)(p - d + llen) != n) {
1656 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1657 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1658 SSL_R_LENGTH_MISMATCH);
1659 goto err;
1660 }
1661
1662 for (nc = 0; nc < llen; ) {
1663 if (p + 2 - d > n) {
1664 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1665 SSL_R_DATA_LENGTH_TOO_LONG);
1666 goto err;
1667 }
1668 n2s(p, l);
1669 if ((l + nc + 2) > llen) {
1670 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1671 goto cont; /* netscape bugs */
1672 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1673 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1674 SSL_R_CA_DN_TOO_LONG);
1675 goto err;
1676 }
1677
1678 q = p;
1679
1680 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
1681 /* If netscape tolerance is on, ignore errors */
1682 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1683 goto cont;
1684 else {
1685 ssl3_send_alert(s, SSL3_AL_FATAL,
1686 SSL_AD_DECODE_ERROR);
1687 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1688 ERR_R_ASN1_LIB);
1689 goto err;
1690 }
1691 }
1692
1693 if (q != (p + l)) {
1694 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1695 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1696 SSL_R_CA_DN_LENGTH_MISMATCH);
1697 goto err;
1698 }
1699 if (!sk_X509_NAME_push(ca_sk, xn)) {
1700 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1701 ERR_R_MALLOC_FAILURE);
1702 goto err;
1703 }
1704
1705 p += l;
1706 nc += l + 2;
1707 }
1708
1709 if (0) {
1710cont:
1711 ERR_clear_error();
1712 }
1713
1714 /* we should setup a certificate to return.... */
1715 s->s3->tmp.cert_req = 1;
1716 s->s3->tmp.ctype_num = ctype_num;
1717 if (s->s3->tmp.ca_names != NULL)
1718 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1719 s->s3->tmp.ca_names = ca_sk;
1720 ca_sk = NULL;
1721
1722 ret = 1;
1723 if (0) {
1724truncated:
1725 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1726 SSL_R_BAD_PACKET_LENGTH);
1727 }
1728err:
1729 if (ca_sk != NULL)
1730 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1731 return (ret);
1732}
1733
1734static int
1735ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1736{
1737 return (X509_NAME_cmp(*a, *b));
1738}
1739
1740int
1741ssl3_get_new_session_ticket(SSL *s)
1742{
1743 int ok, al, ret = 0, ticklen;
1744 long n;
1745 const unsigned char *p;
1746 unsigned char *d;
1747
1748 n = s->method->ssl_get_message(s, SSL3_ST_CR_SESSION_TICKET_A,
1749 SSL3_ST_CR_SESSION_TICKET_B, -1, 16384, &ok);
1750 if (!ok)
1751 return ((int)n);
1752
1753 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) {
1754 s->s3->tmp.reuse_message = 1;
1755 return (1);
1756 }
1757 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) {
1758 al = SSL_AD_UNEXPECTED_MESSAGE;
1759 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,
1760 SSL_R_BAD_MESSAGE_TYPE);
1761 goto f_err;
1762 }
1763 if (n < 6) {
1764 /* need at least ticket_lifetime_hint + ticket length */
1765 al = SSL_AD_DECODE_ERROR;
1766 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,
1767 SSL_R_LENGTH_MISMATCH);
1768 goto f_err;
1769 }
1770
1771 p = d = (unsigned char *)s->init_msg;
1772 n2l(p, s->session->tlsext_tick_lifetime_hint);
1773 n2s(p, ticklen);
1774 /* ticket_lifetime_hint + ticket_length + ticket */
1775 if (ticklen + 6 != n) {
1776 al = SSL_AD_DECODE_ERROR;
1777 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,
1778 SSL_R_LENGTH_MISMATCH);
1779 goto f_err;
1780 }
1781 free(s->session->tlsext_tick);
1782 s->session->tlsext_ticklen = 0;
1783 s->session->tlsext_tick = malloc(ticklen);
1784 if (!s->session->tlsext_tick) {
1785 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,
1786 ERR_R_MALLOC_FAILURE);
1787 goto err;
1788 }
1789 memcpy(s->session->tlsext_tick, p, ticklen);
1790 s->session->tlsext_ticklen = ticklen;
1791 /*
1792 * There are two ways to detect a resumed ticket sesion.
1793 * One is to set an appropriate session ID and then the server
1794 * must return a match in ServerHello. This allows the normal
1795 * client session ID matching to work and we know much
1796 * earlier that the ticket has been accepted.
1797 *
1798 * The other way is to set zero length session ID when the
1799 * ticket is presented and rely on the handshake to determine
1800 * session resumption.
1801 *
1802 * We choose the former approach because this fits in with
1803 * assumptions elsewhere in OpenSSL. The session ID is set
1804 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1805 * ticket.
1806 */
1807 EVP_Digest(p, ticklen, s->session->session_id,
1808 &s->session->session_id_length, EVP_sha256(), NULL);
1809 ret = 1;
1810 return (ret);
1811f_err:
1812 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1813err:
1814 return (-1);
1815}
1816
1817int
1818ssl3_get_cert_status(SSL *s)
1819{
1820 int ok, al;
1821 unsigned long resplen, n;
1822 const unsigned char *p;
1823
1824 n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_STATUS_A,
1825 SSL3_ST_CR_CERT_STATUS_B, SSL3_MT_CERTIFICATE_STATUS,
1826 16384, &ok);
1827
1828 if (!ok)
1829 return ((int)n);
1830 if (n < 4) {
1831 /* need at least status type + length */
1832 al = SSL_AD_DECODE_ERROR;
1833 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1834 SSL_R_LENGTH_MISMATCH);
1835 goto f_err;
1836 }
1837 p = (unsigned char *)s->init_msg;
1838 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
1839 al = SSL_AD_DECODE_ERROR;
1840 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1841 SSL_R_UNSUPPORTED_STATUS_TYPE);
1842 goto f_err;
1843 }
1844 n2l3(p, resplen);
1845 if (resplen + 4 != n) {
1846 al = SSL_AD_DECODE_ERROR;
1847 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1848 SSL_R_LENGTH_MISMATCH);
1849 goto f_err;
1850 }
1851 free(s->tlsext_ocsp_resp);
1852 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1853 if (!s->tlsext_ocsp_resp) {
1854 al = SSL_AD_INTERNAL_ERROR;
1855 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1856 ERR_R_MALLOC_FAILURE);
1857 goto f_err;
1858 }
1859 s->tlsext_ocsp_resplen = resplen;
1860 if (s->ctx->tlsext_status_cb) {
1861 int ret;
1862 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1863 if (ret == 0) {
1864 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1865 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1866 SSL_R_INVALID_STATUS_RESPONSE);
1867 goto f_err;
1868 }
1869 if (ret < 0) {
1870 al = SSL_AD_INTERNAL_ERROR;
1871 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,
1872 ERR_R_MALLOC_FAILURE);
1873 goto f_err;
1874 }
1875 }
1876 return (1);
1877f_err:
1878 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1879 return (-1);
1880}
1881
1882int
1883ssl3_get_server_done(SSL *s)
1884{
1885 int ok, ret = 0;
1886 long n;
1887
1888 n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_DONE_A,
1889 SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE,
1890 30, /* should be very small, like 0 :-) */ &ok);
1891
1892 if (!ok)
1893 return ((int)n);
1894 if (n > 0) {
1895 /* should contain no data */
1896 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1897 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1898 return (-1);
1899 }
1900 ret = 1;
1901 return (ret);
1902}
1903
1904int
1905ssl3_send_client_key_exchange(SSL *s)
1906{
1907 unsigned char *p, *q;
1908 int n;
1909 unsigned long alg_k;
1910 EVP_PKEY *pkey = NULL;
1911 EC_KEY *clnt_ecdh = NULL;
1912 const EC_POINT *srvr_ecpoint = NULL;
1913 EVP_PKEY *srvr_pub_pkey = NULL;
1914 unsigned char *encodedPoint = NULL;
1915 int encoded_pt_len = 0;
1916 BN_CTX *bn_ctx = NULL;
1917
1918 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
1919 p = ssl3_handshake_msg_start(s, SSL3_MT_CLIENT_KEY_EXCHANGE);
1920
1921 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1922
1923 if (s->session->sess_cert == NULL) {
1924 ssl3_send_alert(s, SSL3_AL_FATAL,
1925 SSL_AD_UNEXPECTED_MESSAGE);
1926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1927 ERR_R_INTERNAL_ERROR);
1928 goto err;
1929 }
1930
1931 if (alg_k & SSL_kRSA) {
1932 RSA *rsa;
1933 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1934
1935 pkey = X509_get_pubkey(
1936 s->session->sess_cert->peer_pkeys[
1937 SSL_PKEY_RSA_ENC].x509);
1938 if ((pkey == NULL) ||
1939 (pkey->type != EVP_PKEY_RSA) ||
1940 (pkey->pkey.rsa == NULL)) {
1941 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1942 ERR_R_INTERNAL_ERROR);
1943 EVP_PKEY_free(pkey);
1944 goto err;
1945 }
1946 rsa = pkey->pkey.rsa;
1947 EVP_PKEY_free(pkey);
1948
1949 tmp_buf[0] = s->client_version >> 8;
1950 tmp_buf[1] = s->client_version & 0xff;
1951 arc4random_buf(&tmp_buf[2], sizeof(tmp_buf) - 2);
1952
1953 s->session->master_key_length = sizeof tmp_buf;
1954
1955 q = p;
1956 /* Fix buf for TLS and beyond */
1957 if (s->version > SSL3_VERSION)
1958 p += 2;
1959 n = RSA_public_encrypt(sizeof tmp_buf,
1960 tmp_buf, p, rsa, RSA_PKCS1_PADDING);
1961 if (n <= 0) {
1962 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1963 SSL_R_BAD_RSA_ENCRYPT);
1964 goto err;
1965 }
1966
1967 /* Fix buf for TLS and beyond */
1968 if (s->version > SSL3_VERSION) {
1969 s2n(n, q);
1970 n += 2;
1971 }
1972
1973 s->session->master_key_length =
1974 s->method->ssl3_enc->generate_master_secret(
1975 s, s->session->master_key, tmp_buf, sizeof tmp_buf);
1976 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1977 } else if (alg_k & SSL_kDHE) {
1978 DH *dh_srvr, *dh_clnt;
1979
1980 /* Ensure that we have an ephemeral key for DHE. */
1981 if (s->session->sess_cert->peer_dh_tmp == NULL) {
1982 ssl3_send_alert(s, SSL3_AL_FATAL,
1983 SSL_AD_HANDSHAKE_FAILURE);
1984 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1985 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1986 goto err;
1987 }
1988 dh_srvr = s->session->sess_cert->peer_dh_tmp;
1989
1990 /* Generate a new random key. */
1991 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
1992 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1993 ERR_R_DH_LIB);
1994 goto err;
1995 }
1996 if (!DH_generate_key(dh_clnt)) {
1997 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1998 ERR_R_DH_LIB);
1999 DH_free(dh_clnt);
2000 goto err;
2001 }
2002
2003 /*
2004 * Use the 'p' output buffer for the DH key, but
2005 * make sure to clear it out afterwards.
2006 */
2007 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt);
2008
2009 if (n <= 0) {
2010 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2011 ERR_R_DH_LIB);
2012 DH_free(dh_clnt);
2013 goto err;
2014 }
2015
2016 /* Generate master key from the result. */
2017 s->session->master_key_length =
2018 s->method->ssl3_enc->generate_master_secret(s,
2019 s->session->master_key, p, n);
2020
2021 /* Clean up. */
2022 memset(p, 0, n);
2023
2024 /* Send off the data. */
2025 n = BN_num_bytes(dh_clnt->pub_key);
2026 s2n(n, p);
2027 BN_bn2bin(dh_clnt->pub_key, p);
2028 n += 2;
2029
2030 DH_free(dh_clnt);
2031
2032 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2033 } else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe)) {
2034 const EC_GROUP *srvr_group = NULL;
2035 EC_KEY *tkey;
2036 int ecdh_clnt_cert = 0;
2037 int field_size = 0;
2038
2039 /*
2040 * Did we send out the client's ECDH share for use
2041 * in premaster computation as part of client
2042 * certificate? If so, set ecdh_clnt_cert to 1.
2043 */
2044 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) &&
2045 (s->cert != NULL)) {
2046 /*
2047 * XXX: For now, we do not support client
2048 * authentication using ECDH certificates.
2049 * To add such support, one needs to add
2050 * code that checks for appropriate
2051 * conditions and sets ecdh_clnt_cert to 1.
2052 * For example, the cert have an ECC
2053 * key on the same curve as the server's
2054 * and the key should be authorized for
2055 * key agreement.
2056 *
2057 * One also needs to add code in ssl3_connect
2058 * to skip sending the certificate verify
2059 * message.
2060 *
2061 * if ((s->cert->key->privatekey != NULL) &&
2062 * (s->cert->key->privatekey->type ==
2063 * EVP_PKEY_EC) && ...)
2064 * ecdh_clnt_cert = 1;
2065 */
2066 }
2067
2068 /* Ensure that we have an ephemeral key for ECDHE. */
2069 if ((alg_k & SSL_kECDHE) &&
2070 s->session->sess_cert->peer_ecdh_tmp == NULL) {
2071 ssl3_send_alert(s, SSL3_AL_FATAL,
2072 SSL_AD_HANDSHAKE_FAILURE);
2073 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2074 ERR_R_INTERNAL_ERROR);
2075 goto err;
2076 }
2077 tkey = s->session->sess_cert->peer_ecdh_tmp;
2078
2079 if (alg_k & (SSL_kECDHr|SSL_kECDHe)) {
2080 /* Get the Server Public Key from Cert */
2081 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2082 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2083 if (srvr_pub_pkey != NULL &&
2084 srvr_pub_pkey->type == EVP_PKEY_EC)
2085 tkey = srvr_pub_pkey->pkey.ec;
2086 }
2087
2088 if (tkey == NULL) {
2089 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2090 ERR_R_INTERNAL_ERROR);
2091 goto err;
2092 }
2093
2094 srvr_group = EC_KEY_get0_group(tkey);
2095 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2096
2097 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2098 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2099 ERR_R_INTERNAL_ERROR);
2100 goto err;
2101 }
2102
2103 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2104 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2105 ERR_R_MALLOC_FAILURE);
2106 goto err;
2107 }
2108
2109 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2110 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2111 ERR_R_EC_LIB);
2112 goto err;
2113 }
2114 if (ecdh_clnt_cert) {
2115 /*
2116 * Reuse key info from our certificate
2117 * We only need our private key to perform
2118 * the ECDH computation.
2119 */
2120 const BIGNUM *priv_key;
2121 tkey = s->cert->key->privatekey->pkey.ec;
2122 priv_key = EC_KEY_get0_private_key(tkey);
2123 if (priv_key == NULL) {
2124 SSLerr(
2125 SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2126 ERR_R_MALLOC_FAILURE);
2127 goto err;
2128 }
2129 if (!EC_KEY_set_private_key(clnt_ecdh,
2130 priv_key)) {
2131 SSLerr(
2132 SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2133 ERR_R_EC_LIB);
2134 goto err;
2135 }
2136 } else {
2137 /* Generate a new ECDH key pair */
2138 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2139 SSLerr(
2140 SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2141 ERR_R_ECDH_LIB);
2142 goto err;
2143 }
2144 }
2145
2146 /*
2147 * Use the 'p' output buffer for the ECDH key, but
2148 * make sure to clear it out afterwards.
2149 */
2150 field_size = EC_GROUP_get_degree(srvr_group);
2151 if (field_size <= 0) {
2152 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2153 ERR_R_ECDH_LIB);
2154 goto err;
2155 }
2156 n = ECDH_compute_key(p, (field_size + 7)/8,
2157 srvr_ecpoint, clnt_ecdh, NULL);
2158 if (n <= 0) {
2159 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2160 ERR_R_ECDH_LIB);
2161 goto err;
2162 }
2163
2164 /* generate master key from the result */
2165 s->session->master_key_length = s->method->ssl3_enc \
2166 -> generate_master_secret(s,
2167 s->session->master_key, p, n);
2168
2169 memset(p, 0, n); /* clean up */
2170
2171 if (ecdh_clnt_cert) {
2172 /* Send empty client key exch message. */
2173 n = 0;
2174 } else {
2175 /*
2176 * First check the size of encoding and
2177 * allocate memory accordingly.
2178 */
2179 encoded_pt_len = EC_POINT_point2oct(
2180 srvr_group,
2181 EC_KEY_get0_public_key(clnt_ecdh),
2182 POINT_CONVERSION_UNCOMPRESSED,
2183 NULL, 0, NULL);
2184
2185 encodedPoint = malloc(encoded_pt_len);
2186
2187 bn_ctx = BN_CTX_new();
2188 if ((encodedPoint == NULL) ||
2189 (bn_ctx == NULL)) {
2190 SSLerr(
2191 SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2192 ERR_R_MALLOC_FAILURE);
2193 goto err;
2194 }
2195
2196 /* Encode the public key */
2197 n = EC_POINT_point2oct(srvr_group,
2198 EC_KEY_get0_public_key(clnt_ecdh),
2199 POINT_CONVERSION_UNCOMPRESSED,
2200 encodedPoint, encoded_pt_len, bn_ctx);
2201
2202 *p = n; /* length of encoded point */
2203 /* Encoded point will be copied here */
2204 p += 1;
2205
2206 /* copy the point */
2207 memcpy((unsigned char *)p, encodedPoint, n);
2208 /* increment n to account for length field */
2209 n += 1;
2210
2211 }
2212
2213 /* Free allocated memory */
2214 BN_CTX_free(bn_ctx);
2215 free(encodedPoint);
2216 EC_KEY_free(clnt_ecdh);
2217 EVP_PKEY_free(srvr_pub_pkey);
2218 } else if (alg_k & SSL_kGOST) {
2219 /* GOST key exchange message creation */
2220 EVP_PKEY_CTX *pkey_ctx;
2221 X509 *peer_cert;
2222
2223 size_t msglen;
2224 unsigned int md_len;
2225 unsigned char premaster_secret[32], shared_ukm[32],
2226 tmp[256];
2227 EVP_MD_CTX *ukm_hash;
2228 EVP_PKEY *pub_key;
2229 int nid;
2230
2231 /* Get server sertificate PKEY and create ctx from it */
2232 peer_cert = s->session->sess_cert->peer_pkeys[SSL_PKEY_GOST01].x509;
2233 if (!peer_cert) {
2234 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2235 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2236 goto err;
2237 }
2238
2239 pkey_ctx = EVP_PKEY_CTX_new(
2240 pub_key = X509_get_pubkey(peer_cert),
2241 NULL);
2242 /*
2243 * If we have send a certificate, and certificate key
2244 * parameters match those of server certificate, use
2245 * certificate key for key exchange.
2246 * Otherwise, generate ephemeral key pair.
2247 */
2248
2249 EVP_PKEY_encrypt_init(pkey_ctx);
2250 /* Generate session key. */
2251 arc4random_buf(premaster_secret, 32);
2252 /*
2253 * If we have client certificate, use its secret
2254 * as peer key.
2255 */
2256 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2257 if (EVP_PKEY_derive_set_peer(pkey_ctx,
2258 s->cert->key->privatekey) <=0) {
2259 /*
2260 * If there was an error -
2261 * just ignore it. Ephemeral key
2262 * would be used
2263 */
2264 ERR_clear_error();
2265 }
2266 }
2267 /*
2268 * Compute shared IV and store it in algorithm-specific
2269 * context data
2270 */
2271 ukm_hash = EVP_MD_CTX_create();
2272 if (ukm_hash == NULL) {
2273 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2274 ERR_R_MALLOC_FAILURE);
2275 goto err;
2276 }
2277
2278 if (ssl_get_algorithm2(s) & SSL_HANDSHAKE_MAC_GOST94)
2279 nid = NID_id_GostR3411_94;
2280 else
2281 nid = NID_id_tc26_gost3411_2012_256;
2282 if (!EVP_DigestInit(ukm_hash, EVP_get_digestbynid(nid)))
2283 goto err;
2284 EVP_DigestUpdate(ukm_hash,
2285 s->s3->client_random, SSL3_RANDOM_SIZE);
2286 EVP_DigestUpdate(ukm_hash,
2287 s->s3->server_random, SSL3_RANDOM_SIZE);
2288 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2289 EVP_MD_CTX_destroy(ukm_hash);
2290 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2291 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2292 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2293 SSL_R_LIBRARY_BUG);
2294 goto err;
2295 }
2296 /*
2297 * Make GOST keytransport blob message,
2298 * encapsulate it into sequence.
2299 */
2300 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2301 msglen = 255;
2302 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen,
2303 premaster_secret, 32) < 0) {
2304 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2305 SSL_R_LIBRARY_BUG);
2306 goto err;
2307 }
2308 if (msglen >= 0x80) {
2309 *(p++) = 0x81;
2310 *(p++) = msglen & 0xff;
2311 n = msglen + 3;
2312 } else {
2313 *(p++) = msglen & 0xff;
2314 n = msglen + 2;
2315 }
2316 memcpy(p, tmp, msglen);
2317 /* Check if pubkey from client certificate was used. */
2318 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1,
2319 EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2320 /* Set flag "skip certificate verify". */
2321 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2322 }
2323 EVP_PKEY_CTX_free(pkey_ctx);
2324 s->session->master_key_length =
2325 s->method->ssl3_enc->generate_master_secret(s,
2326 s->session->master_key, premaster_secret, 32);
2327 EVP_PKEY_free(pub_key);
2328
2329 } else {
2330 ssl3_send_alert(s, SSL3_AL_FATAL,
2331 SSL_AD_HANDSHAKE_FAILURE);
2332 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2333 ERR_R_INTERNAL_ERROR);
2334 goto err;
2335 }
2336
2337 s->state = SSL3_ST_CW_KEY_EXCH_B;
2338
2339 ssl3_handshake_msg_finish(s, n);
2340 }
2341
2342 /* SSL3_ST_CW_KEY_EXCH_B */
2343 return (ssl3_handshake_write(s));
2344
2345err:
2346 BN_CTX_free(bn_ctx);
2347 free(encodedPoint);
2348 EC_KEY_free(clnt_ecdh);
2349 EVP_PKEY_free(srvr_pub_pkey);
2350 return (-1);
2351}
2352
2353int
2354ssl3_send_client_verify(SSL *s)
2355{
2356 unsigned char *p;
2357 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2358 EVP_PKEY *pkey;
2359 EVP_PKEY_CTX *pctx = NULL;
2360 EVP_MD_CTX mctx;
2361 unsigned u = 0;
2362 unsigned long n;
2363 int j;
2364
2365 EVP_MD_CTX_init(&mctx);
2366
2367 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2368 p = ssl3_handshake_msg_start(s, SSL3_MT_CERTIFICATE_VERIFY);
2369
2370 /*
2371 * Create context from key and test if sha1 is allowed as
2372 * digest.
2373 */
2374 pkey = s->cert->key->privatekey;
2375 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2376 EVP_PKEY_sign_init(pctx);
2377 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2378 if (!SSL_USE_SIGALGS(s))
2379 s->method->ssl3_enc->cert_verify_mac(s,
2380 NID_sha1, &(data[MD5_DIGEST_LENGTH]));
2381 } else {
2382 ERR_clear_error();
2383 }
2384 /*
2385 * For TLS v1.2 send signature algorithm and signature
2386 * using agreed digest and cached handshake records.
2387 */
2388 if (SSL_USE_SIGALGS(s)) {
2389 long hdatalen = 0;
2390 void *hdata;
2391 const EVP_MD *md = s->cert->key->digest;
2392 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2393 &hdata);
2394 if (hdatalen <= 0 ||
2395 !tls12_get_sigandhash(p, pkey, md)) {
2396 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2397 ERR_R_INTERNAL_ERROR);
2398 goto err;
2399 }
2400 p += 2;
2401 if (!EVP_SignInit_ex(&mctx, md, NULL) ||
2402 !EVP_SignUpdate(&mctx, hdata, hdatalen) ||
2403 !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
2404 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2405 ERR_R_EVP_LIB);
2406 goto err;
2407 }
2408 s2n(u, p);
2409 n = u + 4;
2410 if (!ssl3_digest_cached_records(s))
2411 goto err;
2412 } else if (pkey->type == EVP_PKEY_RSA) {
2413 s->method->ssl3_enc->cert_verify_mac(
2414 s, NID_md5, &(data[0]));
2415 if (RSA_sign(NID_md5_sha1, data,
2416 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, &(p[2]),
2417 &u, pkey->pkey.rsa) <= 0 ) {
2418 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2419 ERR_R_RSA_LIB);
2420 goto err;
2421 }
2422 s2n(u, p);
2423 n = u + 2;
2424 } else if (pkey->type == EVP_PKEY_DSA) {
2425 if (!DSA_sign(pkey->save_type,
2426 &(data[MD5_DIGEST_LENGTH]),
2427 SHA_DIGEST_LENGTH, &(p[2]),
2428 (unsigned int *)&j, pkey->pkey.dsa)) {
2429 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2430 ERR_R_DSA_LIB);
2431 goto err;
2432 }
2433 s2n(j, p);
2434 n = j + 2;
2435 } else if (pkey->type == EVP_PKEY_EC) {
2436 if (!ECDSA_sign(pkey->save_type,
2437 &(data[MD5_DIGEST_LENGTH]),
2438 SHA_DIGEST_LENGTH, &(p[2]),
2439 (unsigned int *)&j, pkey->pkey.ec)) {
2440 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2441 ERR_R_ECDSA_LIB);
2442 goto err;
2443 }
2444 s2n(j, p);
2445 n = j + 2;
2446#ifndef OPENSSL_NO_GOST
2447 } else if (pkey->type == NID_id_GostR3410_94 ||
2448 pkey->type == NID_id_GostR3410_2001) {
2449 unsigned char signbuf[128];
2450 long hdatalen = 0;
2451 void *hdata;
2452 const EVP_MD *md;
2453 int nid;
2454 size_t sigsize;
2455
2456 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2457 if (hdatalen <= 0) {
2458 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2459 ERR_R_INTERNAL_ERROR);
2460 goto err;
2461 }
2462 if (!EVP_PKEY_get_default_digest_nid(pkey, &nid) ||
2463 !(md = EVP_get_digestbynid(nid))) {
2464 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2465 ERR_R_EVP_LIB);
2466 goto err;
2467 }
2468 if (!EVP_DigestInit_ex(&mctx, md, NULL) ||
2469 !EVP_DigestUpdate(&mctx, hdata, hdatalen) ||
2470 !EVP_DigestFinal(&mctx, signbuf, &u) ||
2471 (EVP_PKEY_CTX_set_signature_md(pctx, md) <= 0) ||
2472 (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
2473 EVP_PKEY_CTRL_GOST_SIG_FORMAT,
2474 GOST_SIG_FORMAT_RS_LE,
2475 NULL) <= 0) ||
2476 (EVP_PKEY_sign(pctx, &(p[2]), &sigsize,
2477 signbuf, u) <= 0)) {
2478 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2479 ERR_R_EVP_LIB);
2480 goto err;
2481 }
2482 if (!ssl3_digest_cached_records(s))
2483 goto err;
2484 j = sigsize;
2485 s2n(j, p);
2486 n = j + 2;
2487#endif
2488 } else {
2489 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2490 ERR_R_INTERNAL_ERROR);
2491 goto err;
2492 }
2493
2494 s->state = SSL3_ST_CW_CERT_VRFY_B;
2495
2496 ssl3_handshake_msg_finish(s, n);
2497 }
2498
2499 EVP_MD_CTX_cleanup(&mctx);
2500 EVP_PKEY_CTX_free(pctx);
2501
2502 return (ssl3_handshake_write(s));
2503
2504err:
2505 EVP_MD_CTX_cleanup(&mctx);
2506 EVP_PKEY_CTX_free(pctx);
2507 return (-1);
2508}
2509
2510int
2511ssl3_send_client_certificate(SSL *s)
2512{
2513 X509 *x509 = NULL;
2514 EVP_PKEY *pkey = NULL;
2515 int i;
2516 unsigned long l;
2517
2518 if (s->state == SSL3_ST_CW_CERT_A) {
2519 if ((s->cert == NULL) || (s->cert->key->x509 == NULL) ||
2520 (s->cert->key->privatekey == NULL))
2521 s->state = SSL3_ST_CW_CERT_B;
2522 else
2523 s->state = SSL3_ST_CW_CERT_C;
2524 }
2525
2526 /* We need to get a client cert */
2527 if (s->state == SSL3_ST_CW_CERT_B) {
2528 /*
2529 * If we get an error, we need to
2530 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2531 * We then get retied later
2532 */
2533 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2534 if (i < 0) {
2535 s->rwstate = SSL_X509_LOOKUP;
2536 return (-1);
2537 }
2538 s->rwstate = SSL_NOTHING;
2539 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2540 s->state = SSL3_ST_CW_CERT_B;
2541 if (!SSL_use_certificate(s, x509) ||
2542 !SSL_use_PrivateKey(s, pkey))
2543 i = 0;
2544 } else if (i == 1) {
2545 i = 0;
2546 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
2547 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2548 }
2549
2550 if (x509 != NULL)
2551 X509_free(x509);
2552 EVP_PKEY_free(pkey);
2553 if (i == 0) {
2554 if (s->version == SSL3_VERSION) {
2555 s->s3->tmp.cert_req = 0;
2556 ssl3_send_alert(s, SSL3_AL_WARNING,
2557 SSL_AD_NO_CERTIFICATE);
2558 return (1);
2559 } else {
2560 s->s3->tmp.cert_req = 2;
2561 }
2562 }
2563
2564 /* Ok, we have a cert */
2565 s->state = SSL3_ST_CW_CERT_C;
2566 }
2567
2568 if (s->state == SSL3_ST_CW_CERT_C) {
2569 s->state = SSL3_ST_CW_CERT_D;
2570 l = ssl3_output_cert_chain(s,
2571 (s->s3->tmp.cert_req == 2) ? NULL : s->cert->key->x509);
2572 s->init_num = (int)l;
2573 s->init_off = 0;
2574 }
2575 /* SSL3_ST_CW_CERT_D */
2576 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
2577}
2578
2579#define has_bits(i,m) (((i)&(m)) == (m))
2580
2581int
2582ssl3_check_cert_and_algorithm(SSL *s)
2583{
2584 int i, idx;
2585 long alg_k, alg_a;
2586 EVP_PKEY *pkey = NULL;
2587 SESS_CERT *sc;
2588 DH *dh;
2589
2590 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2591 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2592
2593 /* We don't have a certificate. */
2594 if (alg_a & SSL_aNULL)
2595 return (1);
2596
2597 sc = s->session->sess_cert;
2598 if (sc == NULL) {
2599 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2600 ERR_R_INTERNAL_ERROR);
2601 goto err;
2602 }
2603 dh = s->session->sess_cert->peer_dh_tmp;
2604
2605 /* This is the passed certificate. */
2606
2607 idx = sc->peer_cert_type;
2608 if (idx == SSL_PKEY_ECC) {
2609 if (ssl_check_srvr_ecc_cert_and_alg(
2610 sc->peer_pkeys[idx].x509, s) == 0) {
2611 /* check failed */
2612 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2613 SSL_R_BAD_ECC_CERT);
2614 goto f_err;
2615 } else {
2616 return (1);
2617 }
2618 }
2619 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509);
2620 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey);
2621 EVP_PKEY_free(pkey);
2622
2623 /* Check that we have a certificate if we require one. */
2624 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_SIGN)) {
2625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2626 SSL_R_MISSING_RSA_SIGNING_CERT);
2627 goto f_err;
2628 } else if ((alg_a & SSL_aDSS) &&
2629 !has_bits(i, EVP_PK_DSA|EVP_PKT_SIGN)) {
2630 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2631 SSL_R_MISSING_DSA_SIGNING_CERT);
2632 goto f_err;
2633 }
2634 if ((alg_k & SSL_kRSA) &&
2635 !has_bits(i, EVP_PK_RSA|EVP_PKT_ENC)) {
2636 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2637 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2638 goto f_err;
2639 }
2640 if ((alg_k & SSL_kDHE) &&
2641 !(has_bits(i, EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) {
2642 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2643 SSL_R_MISSING_DH_KEY);
2644 goto f_err;
2645 }
2646
2647 return (1);
2648f_err:
2649 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2650err:
2651 return (0);
2652}
2653
2654int
2655ssl3_send_next_proto(SSL *s)
2656{
2657 unsigned int len, padding_len;
2658 unsigned char *d, *p;
2659
2660 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
2661 d = p = ssl3_handshake_msg_start(s, SSL3_MT_NEXT_PROTO);
2662
2663 len = s->next_proto_negotiated_len;
2664 padding_len = 32 - ((len + 2) % 32);
2665 *(p++) = len;
2666 memcpy(p, s->next_proto_negotiated, len);
2667 p += len;
2668 *(p++) = padding_len;
2669 memset(p, 0, padding_len);
2670 p += padding_len;
2671
2672 ssl3_handshake_msg_finish(s, p - d);
2673
2674 s->state = SSL3_ST_CW_NEXT_PROTO_B;
2675 }
2676
2677 return (ssl3_handshake_write(s));
2678}
2679
2680/*
2681 * Check to see if handshake is full or resumed. Usually this is just a
2682 * case of checking to see if a cache hit has occurred. In the case of
2683 * session tickets we have to check the next message to be sure.
2684 */
2685
2686int
2687ssl3_check_finished(SSL *s)
2688{
2689 int ok;
2690 long n;
2691
2692 /* If we have no ticket it cannot be a resumed session. */
2693 if (!s->session->tlsext_tick)
2694 return (1);
2695 /* this function is called when we really expect a Certificate
2696 * message, so permit appropriate message length */
2697 n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_A,
2698 SSL3_ST_CR_CERT_B, -1, s->max_cert_list, &ok);
2699 if (!ok)
2700 return ((int)n);
2701 s->s3->tmp.reuse_message = 1;
2702 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) ||
2703 (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2704 return (2);
2705
2706 return (1);
2707}
2708
2709int
2710ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2711{
2712 int i = 0;
2713
2714#ifndef OPENSSL_NO_ENGINE
2715 if (s->ctx->client_cert_engine) {
2716 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2717 SSL_get_client_CA_list(s),
2718 px509, ppkey, NULL, NULL, NULL);
2719 if (i != 0)
2720 return (i);
2721 }
2722#endif
2723 if (s->ctx->client_cert_cb)
2724 i = s->ctx->client_cert_cb(s, px509, ppkey);
2725 return (i);
2726}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 08:37:18 +0000