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-rw-r--r--src/lib/libssl/ssl_srvr.c2472
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diff --git a/src/lib/libssl/ssl_srvr.c b/src/lib/libssl/ssl_srvr.c
deleted file mode 100644
index 359395051a..0000000000
--- a/src/lib/libssl/ssl_srvr.c
+++ /dev/null
@@ -1,2472 +0,0 @@
1/* $OpenBSD: ssl_srvr.c,v 1.141 2022/02/05 14:54:10 jsing 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 <openssl/bn.h>
154#include <openssl/buffer.h>
155#include <openssl/curve25519.h>
156#include <openssl/evp.h>
157#include <openssl/dh.h>
158#include <openssl/hmac.h>
159#include <openssl/md5.h>
160#include <openssl/objects.h>
161#include <openssl/opensslconf.h>
162#include <openssl/x509.h>
163
164#ifndef OPENSSL_NO_GOST
165#include <openssl/gost.h>
166#endif
167
168#include "bytestring.h"
169#include "dtls_locl.h"
170#include "ssl_locl.h"
171#include "ssl_sigalgs.h"
172#include "ssl_tlsext.h"
173
174int
175ssl3_accept(SSL *s)
176{
177 unsigned long alg_k;
178 int new_state, state, skip = 0;
179 int listen = 0;
180 int ret = -1;
181
182 ERR_clear_error();
183 errno = 0;
184
185 if (SSL_is_dtls(s))
186 listen = s->d1->listen;
187
188 /* init things to blank */
189 s->internal->in_handshake++;
190 if (!SSL_in_init(s) || SSL_in_before(s))
191 SSL_clear(s);
192
193 if (SSL_is_dtls(s))
194 s->d1->listen = listen;
195
196 for (;;) {
197 state = s->s3->hs.state;
198
199 switch (s->s3->hs.state) {
200 case SSL_ST_RENEGOTIATE:
201 s->internal->renegotiate = 1;
202 /* s->s3->hs.state=SSL_ST_ACCEPT; */
203
204 case SSL_ST_BEFORE:
205 case SSL_ST_ACCEPT:
206 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
207 case SSL_ST_OK|SSL_ST_ACCEPT:
208 s->server = 1;
209
210 ssl_info_callback(s, SSL_CB_HANDSHAKE_START, 1);
211
212 if (!ssl_legacy_stack_version(s, s->version)) {
213 SSLerror(s, ERR_R_INTERNAL_ERROR);
214 ret = -1;
215 goto end;
216 }
217
218 if (!ssl_supported_tls_version_range(s,
219 &s->s3->hs.our_min_tls_version,
220 &s->s3->hs.our_max_tls_version)) {
221 SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE);
222 ret = -1;
223 goto end;
224 }
225
226 if (!ssl3_setup_init_buffer(s)) {
227 ret = -1;
228 goto end;
229 }
230 if (!ssl3_setup_buffers(s)) {
231 ret = -1;
232 goto end;
233 }
234
235 s->internal->init_num = 0;
236
237 if (s->s3->hs.state != SSL_ST_RENEGOTIATE) {
238 /*
239 * Ok, we now need to push on a buffering BIO
240 * so that the output is sent in a way that
241 * TCP likes :-)
242 */
243 if (!ssl_init_wbio_buffer(s, 1)) {
244 ret = -1;
245 goto end;
246 }
247
248 if (!tls1_transcript_init(s)) {
249 ret = -1;
250 goto end;
251 }
252
253 s->s3->hs.state = SSL3_ST_SR_CLNT_HELLO_A;
254 s->ctx->internal->stats.sess_accept++;
255 } else if (!SSL_is_dtls(s) && !s->s3->send_connection_binding) {
256 /*
257 * Server attempting to renegotiate with
258 * client that doesn't support secure
259 * renegotiation.
260 */
261 SSLerror(s, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
262 ssl3_send_alert(s, SSL3_AL_FATAL,
263 SSL_AD_HANDSHAKE_FAILURE);
264 ret = -1;
265 goto end;
266 } else {
267 /*
268 * s->s3->hs.state == SSL_ST_RENEGOTIATE,
269 * we will just send a HelloRequest.
270 */
271 s->ctx->internal->stats.sess_accept_renegotiate++;
272 s->s3->hs.state = SSL3_ST_SW_HELLO_REQ_A;
273 }
274 break;
275
276 case SSL3_ST_SW_HELLO_REQ_A:
277 case SSL3_ST_SW_HELLO_REQ_B:
278 s->internal->shutdown = 0;
279 if (SSL_is_dtls(s)) {
280 dtls1_clear_record_buffer(s);
281 dtls1_start_timer(s);
282 }
283 ret = ssl3_send_hello_request(s);
284 if (ret <= 0)
285 goto end;
286 if (SSL_is_dtls(s))
287 s->s3->hs.tls12.next_state = SSL3_ST_SR_CLNT_HELLO_A;
288 else
289 s->s3->hs.tls12.next_state = SSL3_ST_SW_HELLO_REQ_C;
290 s->s3->hs.state = SSL3_ST_SW_FLUSH;
291 s->internal->init_num = 0;
292
293 if (SSL_is_dtls(s)) {
294 if (!tls1_transcript_init(s)) {
295 ret = -1;
296 goto end;
297 }
298 }
299 break;
300
301 case SSL3_ST_SW_HELLO_REQ_C:
302 s->s3->hs.state = SSL_ST_OK;
303 break;
304
305 case SSL3_ST_SR_CLNT_HELLO_A:
306 case SSL3_ST_SR_CLNT_HELLO_B:
307 case SSL3_ST_SR_CLNT_HELLO_C:
308 s->internal->shutdown = 0;
309 if (SSL_is_dtls(s)) {
310 ret = ssl3_get_client_hello(s);
311 if (ret <= 0)
312 goto end;
313 dtls1_stop_timer(s);
314
315 if (ret == 1 &&
316 (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
317 s->s3->hs.state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A;
318 else
319 s->s3->hs.state = SSL3_ST_SW_SRVR_HELLO_A;
320
321 s->internal->init_num = 0;
322
323 /*
324 * Reflect ClientHello sequence to remain
325 * stateless while listening.
326 */
327 if (listen) {
328 tls12_record_layer_reflect_seq_num(
329 s->internal->rl);
330 }
331
332 /* If we're just listening, stop here */
333 if (listen && s->s3->hs.state == SSL3_ST_SW_SRVR_HELLO_A) {
334 ret = 2;
335 s->d1->listen = 0;
336 /*
337 * Set expected sequence numbers to
338 * continue the handshake.
339 */
340 s->d1->handshake_read_seq = 2;
341 s->d1->handshake_write_seq = 1;
342 s->d1->next_handshake_write_seq = 1;
343 goto end;
344 }
345 } else {
346 if (s->internal->rwstate != SSL_X509_LOOKUP) {
347 ret = ssl3_get_client_hello(s);
348 if (ret <= 0)
349 goto end;
350 }
351
352 s->internal->renegotiate = 2;
353 s->s3->hs.state = SSL3_ST_SW_SRVR_HELLO_A;
354 s->internal->init_num = 0;
355 }
356 break;
357
358 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
359 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
360 ret = ssl3_send_dtls_hello_verify_request(s);
361 if (ret <= 0)
362 goto end;
363 s->s3->hs.state = SSL3_ST_SW_FLUSH;
364 s->s3->hs.tls12.next_state = SSL3_ST_SR_CLNT_HELLO_A;
365
366 /* HelloVerifyRequest resets Finished MAC. */
367 tls1_transcript_reset(s);
368 break;
369
370 case SSL3_ST_SW_SRVR_HELLO_A:
371 case SSL3_ST_SW_SRVR_HELLO_B:
372 if (SSL_is_dtls(s)) {
373 s->internal->renegotiate = 2;
374 dtls1_start_timer(s);
375 }
376 ret = ssl3_send_server_hello(s);
377 if (ret <= 0)
378 goto end;
379 if (s->internal->hit) {
380 if (s->internal->tlsext_ticket_expected)
381 s->s3->hs.state = SSL3_ST_SW_SESSION_TICKET_A;
382 else
383 s->s3->hs.state = SSL3_ST_SW_CHANGE_A;
384 } else {
385 s->s3->hs.state = SSL3_ST_SW_CERT_A;
386 }
387 s->internal->init_num = 0;
388 break;
389
390 case SSL3_ST_SW_CERT_A:
391 case SSL3_ST_SW_CERT_B:
392 /* Check if it is anon DH or anon ECDH. */
393 if (!(s->s3->hs.cipher->algorithm_auth &
394 SSL_aNULL)) {
395 if (SSL_is_dtls(s))
396 dtls1_start_timer(s);
397 ret = ssl3_send_server_certificate(s);
398 if (ret <= 0)
399 goto end;
400 if (s->internal->tlsext_status_expected)
401 s->s3->hs.state = SSL3_ST_SW_CERT_STATUS_A;
402 else
403 s->s3->hs.state = SSL3_ST_SW_KEY_EXCH_A;
404 } else {
405 skip = 1;
406 s->s3->hs.state = SSL3_ST_SW_KEY_EXCH_A;
407 }
408 s->internal->init_num = 0;
409 break;
410
411 case SSL3_ST_SW_KEY_EXCH_A:
412 case SSL3_ST_SW_KEY_EXCH_B:
413 alg_k = s->s3->hs.cipher->algorithm_mkey;
414
415 /*
416 * Only send if using a DH key exchange.
417 *
418 * For ECC ciphersuites, we send a ServerKeyExchange
419 * message only if the cipher suite is ECDHE. In other
420 * cases, the server certificate contains the server's
421 * public key for key exchange.
422 */
423 if (alg_k & (SSL_kDHE|SSL_kECDHE)) {
424 if (SSL_is_dtls(s))
425 dtls1_start_timer(s);
426 ret = ssl3_send_server_key_exchange(s);
427 if (ret <= 0)
428 goto end;
429 } else
430 skip = 1;
431
432 s->s3->hs.state = SSL3_ST_SW_CERT_REQ_A;
433 s->internal->init_num = 0;
434 break;
435
436 case SSL3_ST_SW_CERT_REQ_A:
437 case SSL3_ST_SW_CERT_REQ_B:
438 /*
439 * Determine whether or not we need to request a
440 * certificate.
441 *
442 * Do not request a certificate if:
443 *
444 * - We did not ask for it (SSL_VERIFY_PEER is unset).
445 *
446 * - SSL_VERIFY_CLIENT_ONCE is set and we are
447 * renegotiating.
448 *
449 * - We are using an anonymous ciphersuites
450 * (see section "Certificate request" in SSL 3 drafts
451 * and in RFC 2246) ... except when the application
452 * insists on verification (against the specs, but
453 * s3_clnt.c accepts this for SSL 3).
454 */
455 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
456 ((s->session->peer_cert != NULL) &&
457 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
458 ((s->s3->hs.cipher->algorithm_auth &
459 SSL_aNULL) && !(s->verify_mode &
460 SSL_VERIFY_FAIL_IF_NO_PEER_CERT))) {
461 /* No cert request. */
462 skip = 1;
463 s->s3->hs.tls12.cert_request = 0;
464 s->s3->hs.state = SSL3_ST_SW_SRVR_DONE_A;
465
466 if (!SSL_is_dtls(s))
467 tls1_transcript_free(s);
468 } else {
469 s->s3->hs.tls12.cert_request = 1;
470 if (SSL_is_dtls(s))
471 dtls1_start_timer(s);
472 ret = ssl3_send_certificate_request(s);
473 if (ret <= 0)
474 goto end;
475 s->s3->hs.state = SSL3_ST_SW_SRVR_DONE_A;
476 s->internal->init_num = 0;
477 }
478 break;
479
480 case SSL3_ST_SW_SRVR_DONE_A:
481 case SSL3_ST_SW_SRVR_DONE_B:
482 if (SSL_is_dtls(s))
483 dtls1_start_timer(s);
484 ret = ssl3_send_server_done(s);
485 if (ret <= 0)
486 goto end;
487 s->s3->hs.tls12.next_state = SSL3_ST_SR_CERT_A;
488 s->s3->hs.state = SSL3_ST_SW_FLUSH;
489 s->internal->init_num = 0;
490 break;
491
492 case SSL3_ST_SW_FLUSH:
493 /*
494 * This code originally checked to see if
495 * any data was pending using BIO_CTRL_INFO
496 * and then flushed. This caused problems
497 * as documented in PR#1939. The proposed
498 * fix doesn't completely resolve this issue
499 * as buggy implementations of BIO_CTRL_PENDING
500 * still exist. So instead we just flush
501 * unconditionally.
502 */
503 s->internal->rwstate = SSL_WRITING;
504 if (BIO_flush(s->wbio) <= 0) {
505 if (SSL_is_dtls(s)) {
506 /* If the write error was fatal, stop trying. */
507 if (!BIO_should_retry(s->wbio)) {
508 s->internal->rwstate = SSL_NOTHING;
509 s->s3->hs.state = s->s3->hs.tls12.next_state;
510 }
511 }
512 ret = -1;
513 goto end;
514 }
515 s->internal->rwstate = SSL_NOTHING;
516 s->s3->hs.state = s->s3->hs.tls12.next_state;
517 break;
518
519 case SSL3_ST_SR_CERT_A:
520 case SSL3_ST_SR_CERT_B:
521 if (s->s3->hs.tls12.cert_request) {
522 ret = ssl3_get_client_certificate(s);
523 if (ret <= 0)
524 goto end;
525 }
526 s->internal->init_num = 0;
527 s->s3->hs.state = SSL3_ST_SR_KEY_EXCH_A;
528 break;
529
530 case SSL3_ST_SR_KEY_EXCH_A:
531 case SSL3_ST_SR_KEY_EXCH_B:
532 ret = ssl3_get_client_key_exchange(s);
533 if (ret <= 0)
534 goto end;
535
536 if (SSL_is_dtls(s)) {
537 s->s3->hs.state = SSL3_ST_SR_CERT_VRFY_A;
538 s->internal->init_num = 0;
539 }
540
541 alg_k = s->s3->hs.cipher->algorithm_mkey;
542 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
543 /*
544 * A GOST client may use the key from its
545 * certificate for key exchange, in which case
546 * the CertificateVerify message is not sent.
547 */
548 s->s3->hs.state = SSL3_ST_SR_FINISHED_A;
549 s->internal->init_num = 0;
550 } else if (SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST)) {
551 s->s3->hs.state = SSL3_ST_SR_CERT_VRFY_A;
552 s->internal->init_num = 0;
553 if (!s->session->peer_cert)
554 break;
555 /*
556 * Freeze the transcript for use during client
557 * certificate verification.
558 */
559 tls1_transcript_freeze(s);
560 } else {
561 s->s3->hs.state = SSL3_ST_SR_CERT_VRFY_A;
562 s->internal->init_num = 0;
563
564 tls1_transcript_free(s);
565
566 /*
567 * We need to get hashes here so if there is
568 * a client cert, it can be verified.
569 */
570 if (!tls1_transcript_hash_value(s,
571 s->s3->hs.tls12.cert_verify,
572 sizeof(s->s3->hs.tls12.cert_verify),
573 NULL)) {
574 ret = -1;
575 goto end;
576 }
577 }
578 break;
579
580 case SSL3_ST_SR_CERT_VRFY_A:
581 case SSL3_ST_SR_CERT_VRFY_B:
582 if (SSL_is_dtls(s))
583 s->d1->change_cipher_spec_ok = 1;
584 else
585 s->s3->flags |= SSL3_FLAGS_CCS_OK;
586
587 /* we should decide if we expected this one */
588 ret = ssl3_get_cert_verify(s);
589 if (ret <= 0)
590 goto end;
591 s->s3->hs.state = SSL3_ST_SR_FINISHED_A;
592 s->internal->init_num = 0;
593 break;
594
595 case SSL3_ST_SR_FINISHED_A:
596 case SSL3_ST_SR_FINISHED_B:
597 if (SSL_is_dtls(s))
598 s->d1->change_cipher_spec_ok = 1;
599 else
600 s->s3->flags |= SSL3_FLAGS_CCS_OK;
601 ret = ssl3_get_finished(s, SSL3_ST_SR_FINISHED_A,
602 SSL3_ST_SR_FINISHED_B);
603 if (ret <= 0)
604 goto end;
605 if (SSL_is_dtls(s))
606 dtls1_stop_timer(s);
607 if (s->internal->hit)
608 s->s3->hs.state = SSL_ST_OK;
609 else if (s->internal->tlsext_ticket_expected)
610 s->s3->hs.state = SSL3_ST_SW_SESSION_TICKET_A;
611 else
612 s->s3->hs.state = SSL3_ST_SW_CHANGE_A;
613 s->internal->init_num = 0;
614 break;
615
616 case SSL3_ST_SW_SESSION_TICKET_A:
617 case SSL3_ST_SW_SESSION_TICKET_B:
618 ret = ssl3_send_newsession_ticket(s);
619 if (ret <= 0)
620 goto end;
621 s->s3->hs.state = SSL3_ST_SW_CHANGE_A;
622 s->internal->init_num = 0;
623 break;
624
625 case SSL3_ST_SW_CERT_STATUS_A:
626 case SSL3_ST_SW_CERT_STATUS_B:
627 ret = ssl3_send_cert_status(s);
628 if (ret <= 0)
629 goto end;
630 s->s3->hs.state = SSL3_ST_SW_KEY_EXCH_A;
631 s->internal->init_num = 0;
632 break;
633
634 case SSL3_ST_SW_CHANGE_A:
635 case SSL3_ST_SW_CHANGE_B:
636 ret = ssl3_send_change_cipher_spec(s,
637 SSL3_ST_SW_CHANGE_A, SSL3_ST_SW_CHANGE_B);
638 if (ret <= 0)
639 goto end;
640 s->s3->hs.state = SSL3_ST_SW_FINISHED_A;
641 s->internal->init_num = 0;
642 s->session->cipher = s->s3->hs.cipher;
643
644 if (!tls1_setup_key_block(s)) {
645 ret = -1;
646 goto end;
647 }
648 if (!tls1_change_write_cipher_state(s)) {
649 ret = -1;
650 goto end;
651 }
652 break;
653
654 case SSL3_ST_SW_FINISHED_A:
655 case SSL3_ST_SW_FINISHED_B:
656 ret = ssl3_send_finished(s, SSL3_ST_SW_FINISHED_A,
657 SSL3_ST_SW_FINISHED_B);
658 if (ret <= 0)
659 goto end;
660 s->s3->hs.state = SSL3_ST_SW_FLUSH;
661 if (s->internal->hit) {
662 s->s3->hs.tls12.next_state = SSL3_ST_SR_FINISHED_A;
663 tls1_transcript_free(s);
664 } else
665 s->s3->hs.tls12.next_state = SSL_ST_OK;
666 s->internal->init_num = 0;
667 break;
668
669 case SSL_ST_OK:
670 /* clean a few things up */
671 tls1_cleanup_key_block(s);
672
673 if (s->s3->handshake_transcript != NULL) {
674 SSLerror(s, ERR_R_INTERNAL_ERROR);
675 ret = -1;
676 goto end;
677 }
678
679 if (!SSL_is_dtls(s))
680 ssl3_release_init_buffer(s);
681
682 /* remove buffering on output */
683 ssl_free_wbio_buffer(s);
684
685 s->internal->init_num = 0;
686
687 /* Skipped if we just sent a HelloRequest. */
688 if (s->internal->renegotiate == 2) {
689 s->internal->renegotiate = 0;
690 s->internal->new_session = 0;
691
692 ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
693
694 s->ctx->internal->stats.sess_accept_good++;
695 /* s->server=1; */
696 s->internal->handshake_func = ssl3_accept;
697
698 ssl_info_callback(s, SSL_CB_HANDSHAKE_DONE, 1);
699 }
700
701 ret = 1;
702
703 if (SSL_is_dtls(s)) {
704 /* Done handshaking, next message is client hello. */
705 s->d1->handshake_read_seq = 0;
706 /* Next message is server hello. */
707 s->d1->handshake_write_seq = 0;
708 s->d1->next_handshake_write_seq = 0;
709 }
710 goto end;
711 /* break; */
712
713 default:
714 SSLerror(s, SSL_R_UNKNOWN_STATE);
715 ret = -1;
716 goto end;
717 /* break; */
718 }
719
720 if (!s->s3->hs.tls12.reuse_message && !skip) {
721 if (s->internal->debug) {
722 if ((ret = BIO_flush(s->wbio)) <= 0)
723 goto end;
724 }
725
726
727 if (s->s3->hs.state != state) {
728 new_state = s->s3->hs.state;
729 s->s3->hs.state = state;
730 ssl_info_callback(s, SSL_CB_ACCEPT_LOOP, 1);
731 s->s3->hs.state = new_state;
732 }
733 }
734 skip = 0;
735 }
736 end:
737 /* BIO_flush(s->wbio); */
738 s->internal->in_handshake--;
739 ssl_info_callback(s, SSL_CB_ACCEPT_EXIT, ret);
740
741 return (ret);
742}
743
744int
745ssl3_send_hello_request(SSL *s)
746{
747 CBB cbb, hello;
748
749 memset(&cbb, 0, sizeof(cbb));
750
751 if (s->s3->hs.state == SSL3_ST_SW_HELLO_REQ_A) {
752 if (!ssl3_handshake_msg_start(s, &cbb, &hello,
753 SSL3_MT_HELLO_REQUEST))
754 goto err;
755 if (!ssl3_handshake_msg_finish(s, &cbb))
756 goto err;
757
758 s->s3->hs.state = SSL3_ST_SW_HELLO_REQ_B;
759 }
760
761 /* SSL3_ST_SW_HELLO_REQ_B */
762 return (ssl3_handshake_write(s));
763
764 err:
765 CBB_cleanup(&cbb);
766
767 return (-1);
768}
769
770int
771ssl3_get_client_hello(SSL *s)
772{
773 CBS cbs, client_random, session_id, cookie, cipher_suites;
774 CBS compression_methods;
775 uint16_t client_version;
776 uint8_t comp_method;
777 int comp_null;
778 int i, j, al, ret, cookie_valid = 0;
779 unsigned long id;
780 SSL_CIPHER *c;
781 STACK_OF(SSL_CIPHER) *ciphers = NULL;
782 unsigned long alg_k;
783 const SSL_METHOD *method;
784 uint16_t shared_version;
785
786 /*
787 * We do this so that we will respond with our native type.
788 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
789 * This down switching should be handled by a different method.
790 * If we are SSLv3, we will respond with SSLv3, even if prompted with
791 * TLSv1.
792 */
793 if (s->s3->hs.state == SSL3_ST_SR_CLNT_HELLO_A)
794 s->s3->hs.state = SSL3_ST_SR_CLNT_HELLO_B;
795
796 s->internal->first_packet = 1;
797 if ((ret = ssl3_get_message(s, SSL3_ST_SR_CLNT_HELLO_B,
798 SSL3_ST_SR_CLNT_HELLO_C, SSL3_MT_CLIENT_HELLO,
799 SSL3_RT_MAX_PLAIN_LENGTH)) <= 0)
800 return ret;
801 s->internal->first_packet = 0;
802
803 ret = -1;
804
805 if (s->internal->init_num < 0)
806 goto err;
807
808 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
809
810 /* Parse client hello up until the extensions (if any). */
811 if (!CBS_get_u16(&cbs, &client_version))
812 goto decode_err;
813 if (!CBS_get_bytes(&cbs, &client_random, SSL3_RANDOM_SIZE))
814 goto decode_err;
815 if (!CBS_get_u8_length_prefixed(&cbs, &session_id))
816 goto decode_err;
817 if (CBS_len(&session_id) > SSL3_SESSION_ID_SIZE) {
818 al = SSL_AD_ILLEGAL_PARAMETER;
819 SSLerror(s, SSL_R_SSL3_SESSION_ID_TOO_LONG);
820 goto fatal_err;
821 }
822 if (SSL_is_dtls(s)) {
823 if (!CBS_get_u8_length_prefixed(&cbs, &cookie))
824 goto decode_err;
825 }
826 if (!CBS_get_u16_length_prefixed(&cbs, &cipher_suites))
827 goto decode_err;
828 if (!CBS_get_u8_length_prefixed(&cbs, &compression_methods))
829 goto decode_err;
830
831 /*
832 * Use version from inside client hello, not from record header.
833 * (may differ: see RFC 2246, Appendix E, second paragraph)
834 */
835 if (!ssl_max_shared_version(s, client_version, &shared_version)) {
836 if ((client_version >> 8) == SSL3_VERSION_MAJOR &&
837 !tls12_record_layer_write_protected(s->internal->rl)) {
838 /*
839 * Similar to ssl3_get_record, send alert using remote
840 * version number.
841 */
842 s->version = client_version;
843 }
844 SSLerror(s, SSL_R_WRONG_VERSION_NUMBER);
845 al = SSL_AD_PROTOCOL_VERSION;
846 goto fatal_err;
847 }
848 s->s3->hs.peer_legacy_version = client_version;
849 s->version = shared_version;
850
851 s->s3->hs.negotiated_tls_version = ssl_tls_version(shared_version);
852 if (s->s3->hs.negotiated_tls_version == 0) {
853 SSLerror(s, ERR_R_INTERNAL_ERROR);
854 goto err;
855 }
856
857 if ((method = ssl_get_method(shared_version)) == NULL) {
858 SSLerror(s, ERR_R_INTERNAL_ERROR);
859 goto err;
860 }
861 s->method = method;
862
863 /*
864 * If we require cookies (DTLS) and this ClientHello does not contain
865 * one, just return since we do not want to allocate any memory yet.
866 * So check cookie length...
867 */
868 if (SSL_is_dtls(s)) {
869 if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
870 if (CBS_len(&cookie) == 0)
871 return (1);
872 }
873 }
874
875 if (!CBS_write_bytes(&client_random, s->s3->client_random,
876 sizeof(s->s3->client_random), NULL))
877 goto err;
878
879 s->internal->hit = 0;
880
881 /*
882 * Versions before 0.9.7 always allow clients to resume sessions in
883 * renegotiation. 0.9.7 and later allow this by default, but optionally
884 * ignore resumption requests with flag
885 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag
886 * rather than a change to default behavior so that applications
887 * relying on this for security won't even compile against older
888 * library versions).
889 *
890 * 1.0.1 and later also have a function SSL_renegotiate_abbreviated()
891 * to request renegotiation but not a new session (s->internal->new_session
892 * remains unset): for servers, this essentially just means that the
893 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION setting will be
894 * ignored.
895 */
896 if ((s->internal->new_session && (s->internal->options &
897 SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) {
898 if (!ssl_get_new_session(s, 1))
899 goto err;
900 } else {
901 CBS ext_block;
902
903 CBS_dup(&cbs, &ext_block);
904
905 i = ssl_get_prev_session(s, &session_id, &ext_block, &al);
906 if (i == 1) { /* previous session */
907 s->internal->hit = 1;
908 } else if (i == -1)
909 goto fatal_err;
910 else {
911 /* i == 0 */
912 if (!ssl_get_new_session(s, 1))
913 goto err;
914 }
915 }
916
917 if (SSL_is_dtls(s)) {
918 /*
919 * The ClientHello may contain a cookie even if the HelloVerify
920 * message has not been sent - make sure that it does not cause
921 * an overflow.
922 */
923 if (CBS_len(&cookie) > sizeof(s->d1->rcvd_cookie)) {
924 al = SSL_AD_DECODE_ERROR;
925 SSLerror(s, SSL_R_COOKIE_MISMATCH);
926 goto fatal_err;
927 }
928
929 /* Verify the cookie if appropriate option is set. */
930 if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
931 CBS_len(&cookie) > 0) {
932 size_t cookie_len;
933
934 /* XXX - rcvd_cookie seems to only be used here... */
935 if (!CBS_write_bytes(&cookie, s->d1->rcvd_cookie,
936 sizeof(s->d1->rcvd_cookie), &cookie_len))
937 goto err;
938
939 if (s->ctx->internal->app_verify_cookie_cb != NULL) {
940 if (s->ctx->internal->app_verify_cookie_cb(s,
941 s->d1->rcvd_cookie, cookie_len) == 0) {
942 al = SSL_AD_HANDSHAKE_FAILURE;
943 SSLerror(s, SSL_R_COOKIE_MISMATCH);
944 goto fatal_err;
945 }
946 /* else cookie verification succeeded */
947 /* XXX - can d1->cookie_len > sizeof(rcvd_cookie) ? */
948 } else if (timingsafe_memcmp(s->d1->rcvd_cookie,
949 s->d1->cookie, s->d1->cookie_len) != 0) {
950 /* default verification */
951 al = SSL_AD_HANDSHAKE_FAILURE;
952 SSLerror(s, SSL_R_COOKIE_MISMATCH);
953 goto fatal_err;
954 }
955 cookie_valid = 1;
956 }
957 }
958
959 /* XXX - This logic seems wrong... */
960 if (CBS_len(&cipher_suites) == 0 && CBS_len(&session_id) != 0) {
961 /* we need a cipher if we are not resuming a session */
962 al = SSL_AD_ILLEGAL_PARAMETER;
963 SSLerror(s, SSL_R_NO_CIPHERS_SPECIFIED);
964 goto fatal_err;
965 }
966
967 if (CBS_len(&cipher_suites) > 0) {
968 if ((ciphers = ssl_bytes_to_cipher_list(s,
969 &cipher_suites)) == NULL)
970 goto err;
971 }
972
973 /* If it is a hit, check that the cipher is in the list */
974 /* XXX - CBS_len(&cipher_suites) will always be zero here... */
975 if (s->internal->hit && CBS_len(&cipher_suites) > 0) {
976 j = 0;
977 id = s->session->cipher->id;
978
979 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
980 c = sk_SSL_CIPHER_value(ciphers, i);
981 if (c->id == id) {
982 j = 1;
983 break;
984 }
985 }
986 if (j == 0) {
987 /*
988 * We need to have the cipher in the cipher
989 * list if we are asked to reuse it
990 */
991 al = SSL_AD_ILLEGAL_PARAMETER;
992 SSLerror(s, SSL_R_REQUIRED_CIPHER_MISSING);
993 goto fatal_err;
994 }
995 }
996
997 comp_null = 0;
998 while (CBS_len(&compression_methods) > 0) {
999 if (!CBS_get_u8(&compression_methods, &comp_method))
1000 goto decode_err;
1001 if (comp_method == 0)
1002 comp_null = 1;
1003 }
1004 if (comp_null == 0) {
1005 al = SSL_AD_DECODE_ERROR;
1006 SSLerror(s, SSL_R_NO_COMPRESSION_SPECIFIED);
1007 goto fatal_err;
1008 }
1009
1010 if (!tlsext_server_parse(s, SSL_TLSEXT_MSG_CH, &cbs, &al)) {
1011 SSLerror(s, SSL_R_PARSE_TLSEXT);
1012 goto fatal_err;
1013 }
1014
1015 if (CBS_len(&cbs) != 0)
1016 goto decode_err;
1017
1018 if (!s->s3->renegotiate_seen && s->internal->renegotiate) {
1019 al = SSL_AD_HANDSHAKE_FAILURE;
1020 SSLerror(s, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1021 goto fatal_err;
1022 }
1023
1024 if (ssl_check_clienthello_tlsext_early(s) <= 0) {
1025 SSLerror(s, SSL_R_CLIENTHELLO_TLSEXT);
1026 goto err;
1027 }
1028
1029 /*
1030 * Check if we want to use external pre-shared secret for this
1031 * handshake for not reused session only. We need to generate
1032 * server_random before calling tls_session_secret_cb in order to allow
1033 * SessionTicket processing to use it in key derivation.
1034 */
1035 arc4random_buf(s->s3->server_random, SSL3_RANDOM_SIZE);
1036
1037 if (s->s3->hs.our_max_tls_version >= TLS1_2_VERSION &&
1038 s->s3->hs.negotiated_tls_version < s->s3->hs.our_max_tls_version) {
1039 /*
1040 * RFC 8446 section 4.1.3. If we are downgrading from TLS 1.3
1041 * we must set the last 8 bytes of the server random to magical
1042 * values to indicate we meant to downgrade. For TLS 1.2 it is
1043 * recommended that we do the same.
1044 */
1045 size_t index = SSL3_RANDOM_SIZE - sizeof(tls13_downgrade_12);
1046 uint8_t *magic = &s->s3->server_random[index];
1047 if (s->s3->hs.negotiated_tls_version == TLS1_2_VERSION) {
1048 /* Indicate we chose to downgrade to 1.2. */
1049 memcpy(magic, tls13_downgrade_12,
1050 sizeof(tls13_downgrade_12));
1051 } else {
1052 /* Indicate we chose to downgrade to 1.1 or lower */
1053 memcpy(magic, tls13_downgrade_11,
1054 sizeof(tls13_downgrade_11));
1055 }
1056 }
1057
1058 if (!s->internal->hit && s->internal->tls_session_secret_cb) {
1059 SSL_CIPHER *pref_cipher = NULL;
1060
1061 s->session->master_key_length = sizeof(s->session->master_key);
1062 if (s->internal->tls_session_secret_cb(s, s->session->master_key,
1063 &s->session->master_key_length, ciphers, &pref_cipher,
1064 s->internal->tls_session_secret_cb_arg)) {
1065 s->internal->hit = 1;
1066 s->session->ciphers = ciphers;
1067 s->session->verify_result = X509_V_OK;
1068
1069 ciphers = NULL;
1070
1071 /* check if some cipher was preferred by call back */
1072 pref_cipher = pref_cipher ? pref_cipher :
1073 ssl3_choose_cipher(s, s->session->ciphers,
1074 SSL_get_ciphers(s));
1075 if (pref_cipher == NULL) {
1076 al = SSL_AD_HANDSHAKE_FAILURE;
1077 SSLerror(s, SSL_R_NO_SHARED_CIPHER);
1078 goto fatal_err;
1079 }
1080
1081 s->session->cipher = pref_cipher;
1082
1083 sk_SSL_CIPHER_free(s->cipher_list);
1084 s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
1085 }
1086 }
1087
1088 /*
1089 * Given s->session->ciphers and SSL_get_ciphers, we must
1090 * pick a cipher
1091 */
1092
1093 if (!s->internal->hit) {
1094 sk_SSL_CIPHER_free(s->session->ciphers);
1095 s->session->ciphers = ciphers;
1096 if (ciphers == NULL) {
1097 al = SSL_AD_ILLEGAL_PARAMETER;
1098 SSLerror(s, SSL_R_NO_CIPHERS_PASSED);
1099 goto fatal_err;
1100 }
1101 ciphers = NULL;
1102 c = ssl3_choose_cipher(s, s->session->ciphers,
1103 SSL_get_ciphers(s));
1104
1105 if (c == NULL) {
1106 al = SSL_AD_HANDSHAKE_FAILURE;
1107 SSLerror(s, SSL_R_NO_SHARED_CIPHER);
1108 goto fatal_err;
1109 }
1110 s->s3->hs.cipher = c;
1111 } else {
1112 s->s3->hs.cipher = s->session->cipher;
1113 }
1114
1115 if (!tls1_transcript_hash_init(s))
1116 goto err;
1117
1118 alg_k = s->s3->hs.cipher->algorithm_mkey;
1119 if (!(SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST)) ||
1120 !(s->verify_mode & SSL_VERIFY_PEER))
1121 tls1_transcript_free(s);
1122
1123 /*
1124 * We now have the following setup.
1125 * client_random
1126 * cipher_list - our prefered list of ciphers
1127 * ciphers - the clients prefered list of ciphers
1128 * compression - basically ignored right now
1129 * ssl version is set - sslv3
1130 * s->session - The ssl session has been setup.
1131 * s->internal->hit - session reuse flag
1132 * s->hs.cipher - the new cipher to use.
1133 */
1134
1135 /* Handles TLS extensions that we couldn't check earlier */
1136 if (ssl_check_clienthello_tlsext_late(s) <= 0) {
1137 SSLerror(s, SSL_R_CLIENTHELLO_TLSEXT);
1138 goto err;
1139 }
1140
1141 ret = cookie_valid ? 2 : 1;
1142
1143 if (0) {
1144 decode_err:
1145 al = SSL_AD_DECODE_ERROR;
1146 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1147 fatal_err:
1148 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1149 }
1150 err:
1151 sk_SSL_CIPHER_free(ciphers);
1152
1153 return (ret);
1154}
1155
1156int
1157ssl3_send_dtls_hello_verify_request(SSL *s)
1158{
1159 CBB cbb, verify, cookie;
1160
1161 memset(&cbb, 0, sizeof(cbb));
1162
1163 if (s->s3->hs.state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) {
1164 if (s->ctx->internal->app_gen_cookie_cb == NULL ||
1165 s->ctx->internal->app_gen_cookie_cb(s, s->d1->cookie,
1166 &(s->d1->cookie_len)) == 0) {
1167 SSLerror(s, ERR_R_INTERNAL_ERROR);
1168 return 0;
1169 }
1170
1171 /*
1172 * Per RFC 6347 section 4.2.1, the HelloVerifyRequest should
1173 * always contain DTLSv1.0 regardless of the version that is
1174 * going to be negotiated.
1175 */
1176 if (!ssl3_handshake_msg_start(s, &cbb, &verify,
1177 DTLS1_MT_HELLO_VERIFY_REQUEST))
1178 goto err;
1179 if (!CBB_add_u16(&verify, DTLS1_VERSION))
1180 goto err;
1181 if (!CBB_add_u8_length_prefixed(&verify, &cookie))
1182 goto err;
1183 if (!CBB_add_bytes(&cookie, s->d1->cookie, s->d1->cookie_len))
1184 goto err;
1185 if (!ssl3_handshake_msg_finish(s, &cbb))
1186 goto err;
1187
1188 s->s3->hs.state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
1189 }
1190
1191 /* s->s3->hs.state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
1192 return (ssl3_handshake_write(s));
1193
1194 err:
1195 CBB_cleanup(&cbb);
1196
1197 return (-1);
1198}
1199
1200int
1201ssl3_send_server_hello(SSL *s)
1202{
1203 CBB cbb, server_hello, session_id;
1204 size_t sl;
1205
1206 memset(&cbb, 0, sizeof(cbb));
1207
1208 if (s->s3->hs.state == SSL3_ST_SW_SRVR_HELLO_A) {
1209 if (!ssl3_handshake_msg_start(s, &cbb, &server_hello,
1210 SSL3_MT_SERVER_HELLO))
1211 goto err;
1212
1213 if (!CBB_add_u16(&server_hello, s->version))
1214 goto err;
1215 if (!CBB_add_bytes(&server_hello, s->s3->server_random,
1216 sizeof(s->s3->server_random)))
1217 goto err;
1218
1219 /*
1220 * There are several cases for the session ID to send
1221 * back in the server hello:
1222 *
1223 * - For session reuse from the session cache,
1224 * we send back the old session ID.
1225 * - If stateless session reuse (using a session ticket)
1226 * is successful, we send back the client's "session ID"
1227 * (which doesn't actually identify the session).
1228 * - If it is a new session, we send back the new
1229 * session ID.
1230 * - However, if we want the new session to be single-use,
1231 * we send back a 0-length session ID.
1232 *
1233 * s->internal->hit is non-zero in either case of session reuse,
1234 * so the following won't overwrite an ID that we're supposed
1235 * to send back.
1236 */
1237 if (!(s->ctx->internal->session_cache_mode & SSL_SESS_CACHE_SERVER)
1238 && !s->internal->hit)
1239 s->session->session_id_length = 0;
1240
1241 sl = s->session->session_id_length;
1242 if (sl > sizeof(s->session->session_id)) {
1243 SSLerror(s, ERR_R_INTERNAL_ERROR);
1244 goto err;
1245 }
1246 if (!CBB_add_u8_length_prefixed(&server_hello, &session_id))
1247 goto err;
1248 if (!CBB_add_bytes(&session_id, s->session->session_id, sl))
1249 goto err;
1250
1251 /* Cipher suite. */
1252 if (!CBB_add_u16(&server_hello,
1253 ssl3_cipher_get_value(s->s3->hs.cipher)))
1254 goto err;
1255
1256 /* Compression method (null). */
1257 if (!CBB_add_u8(&server_hello, 0))
1258 goto err;
1259
1260 /* TLS extensions */
1261 if (!tlsext_server_build(s, SSL_TLSEXT_MSG_SH, &server_hello)) {
1262 SSLerror(s, ERR_R_INTERNAL_ERROR);
1263 goto err;
1264 }
1265
1266 if (!ssl3_handshake_msg_finish(s, &cbb))
1267 goto err;
1268 }
1269
1270 /* SSL3_ST_SW_SRVR_HELLO_B */
1271 return (ssl3_handshake_write(s));
1272
1273 err:
1274 CBB_cleanup(&cbb);
1275
1276 return (-1);
1277}
1278
1279int
1280ssl3_send_server_done(SSL *s)
1281{
1282 CBB cbb, done;
1283
1284 memset(&cbb, 0, sizeof(cbb));
1285
1286 if (s->s3->hs.state == SSL3_ST_SW_SRVR_DONE_A) {
1287 if (!ssl3_handshake_msg_start(s, &cbb, &done,
1288 SSL3_MT_SERVER_DONE))
1289 goto err;
1290 if (!ssl3_handshake_msg_finish(s, &cbb))
1291 goto err;
1292
1293 s->s3->hs.state = SSL3_ST_SW_SRVR_DONE_B;
1294 }
1295
1296 /* SSL3_ST_SW_SRVR_DONE_B */
1297 return (ssl3_handshake_write(s));
1298
1299 err:
1300 CBB_cleanup(&cbb);
1301
1302 return (-1);
1303}
1304
1305static int
1306ssl3_send_server_kex_dhe(SSL *s, CBB *cbb)
1307{
1308 int nid = NID_dhKeyAgreement;
1309
1310 tls_key_share_free(s->s3->hs.key_share);
1311 if ((s->s3->hs.key_share = tls_key_share_new_nid(nid)) == NULL)
1312 goto err;
1313
1314 if (s->cert->dhe_params_auto != 0) {
1315 size_t key_bits;
1316
1317 if ((key_bits = ssl_dhe_params_auto_key_bits(s)) == 0) {
1318 SSLerror(s, ERR_R_INTERNAL_ERROR);
1319 ssl3_send_alert(s, SSL3_AL_FATAL,
1320 SSL_AD_INTERNAL_ERROR);
1321 goto err;
1322 }
1323 tls_key_share_set_key_bits(s->s3->hs.key_share,
1324 key_bits);
1325 } else {
1326 DH *dh_params = s->cert->dhe_params;
1327
1328 if (dh_params == NULL && s->cert->dhe_params_cb != NULL)
1329 dh_params = s->cert->dhe_params_cb(s, 0,
1330 SSL_C_PKEYLENGTH(s->s3->hs.cipher));
1331
1332 if (dh_params == NULL) {
1333 SSLerror(s, SSL_R_MISSING_TMP_DH_KEY);
1334 ssl3_send_alert(s, SSL3_AL_FATAL,
1335 SSL_AD_HANDSHAKE_FAILURE);
1336 goto err;
1337 }
1338
1339 if (!tls_key_share_set_dh_params(s->s3->hs.key_share, dh_params))
1340 goto err;
1341 }
1342
1343 if (!tls_key_share_generate(s->s3->hs.key_share))
1344 goto err;
1345
1346 if (!tls_key_share_params(s->s3->hs.key_share, cbb))
1347 goto err;
1348 if (!tls_key_share_public(s->s3->hs.key_share, cbb))
1349 goto err;
1350
1351 return 1;
1352
1353 err:
1354 return 0;
1355}
1356
1357static int
1358ssl3_send_server_kex_ecdhe(SSL *s, CBB *cbb)
1359{
1360 CBB public;
1361 int nid;
1362
1363 if ((nid = tls1_get_shared_curve(s)) == NID_undef) {
1364 SSLerror(s, SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1365 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1366 goto err;
1367 }
1368
1369 tls_key_share_free(s->s3->hs.key_share);
1370 if ((s->s3->hs.key_share = tls_key_share_new_nid(nid)) == NULL)
1371 goto err;
1372
1373 if (!tls_key_share_generate(s->s3->hs.key_share))
1374 goto err;
1375
1376 /*
1377 * ECC key exchange - see RFC 8422, section 5.4.
1378 */
1379 if (!CBB_add_u8(cbb, NAMED_CURVE_TYPE))
1380 goto err;
1381 if (!CBB_add_u16(cbb, tls_key_share_group(s->s3->hs.key_share)))
1382 goto err;
1383 if (!CBB_add_u8_length_prefixed(cbb, &public))
1384 goto err;
1385 if (!tls_key_share_public(s->s3->hs.key_share, &public))
1386 goto err;
1387 if (!CBB_flush(cbb))
1388 goto err;
1389
1390 return 1;
1391
1392 err:
1393 return 0;
1394}
1395
1396int
1397ssl3_send_server_key_exchange(SSL *s)
1398{
1399 CBB cbb, cbb_params, cbb_signature, server_kex;
1400 const struct ssl_sigalg *sigalg = NULL;
1401 unsigned char *signature = NULL;
1402 size_t signature_len = 0;
1403 unsigned char *params = NULL;
1404 size_t params_len;
1405 const EVP_MD *md = NULL;
1406 unsigned long type;
1407 EVP_MD_CTX *md_ctx = NULL;
1408 EVP_PKEY_CTX *pctx;
1409 EVP_PKEY *pkey;
1410 int al;
1411
1412 memset(&cbb, 0, sizeof(cbb));
1413 memset(&cbb_params, 0, sizeof(cbb_params));
1414
1415 if ((md_ctx = EVP_MD_CTX_new()) == NULL)
1416 goto err;
1417
1418 if (s->s3->hs.state == SSL3_ST_SW_KEY_EXCH_A) {
1419
1420 if (!ssl3_handshake_msg_start(s, &cbb, &server_kex,
1421 SSL3_MT_SERVER_KEY_EXCHANGE))
1422 goto err;
1423
1424 if (!CBB_init(&cbb_params, 0))
1425 goto err;
1426
1427 type = s->s3->hs.cipher->algorithm_mkey;
1428 if (type & SSL_kDHE) {
1429 if (!ssl3_send_server_kex_dhe(s, &cbb_params))
1430 goto err;
1431 } else if (type & SSL_kECDHE) {
1432 if (!ssl3_send_server_kex_ecdhe(s, &cbb_params))
1433 goto err;
1434 } else {
1435 al = SSL_AD_HANDSHAKE_FAILURE;
1436 SSLerror(s, SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1437 goto fatal_err;
1438 }
1439
1440 if (!CBB_finish(&cbb_params, &params, &params_len))
1441 goto err;
1442
1443 if (!CBB_add_bytes(&server_kex, params, params_len))
1444 goto err;
1445
1446 /* Add signature unless anonymous. */
1447 if (!(s->s3->hs.cipher->algorithm_auth & SSL_aNULL)) {
1448 if ((pkey = ssl_get_sign_pkey(s, s->s3->hs.cipher,
1449 &md, &sigalg)) == NULL) {
1450 al = SSL_AD_DECODE_ERROR;
1451 goto fatal_err;
1452 }
1453 s->s3->hs.our_sigalg = sigalg;
1454
1455 /* Send signature algorithm. */
1456 if (SSL_USE_SIGALGS(s)) {
1457 if (!CBB_add_u16(&server_kex, sigalg->value)) {
1458 al = SSL_AD_INTERNAL_ERROR;
1459 SSLerror(s, ERR_R_INTERNAL_ERROR);
1460 goto fatal_err;
1461 }
1462 }
1463
1464 if (!EVP_DigestSignInit(md_ctx, &pctx, md, NULL, pkey)) {
1465 SSLerror(s, ERR_R_EVP_LIB);
1466 goto err;
1467 }
1468 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
1469 (!EVP_PKEY_CTX_set_rsa_padding(pctx,
1470 RSA_PKCS1_PSS_PADDING) ||
1471 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) {
1472 SSLerror(s, ERR_R_EVP_LIB);
1473 goto err;
1474 }
1475 if (!EVP_DigestSignUpdate(md_ctx, s->s3->client_random,
1476 SSL3_RANDOM_SIZE)) {
1477 SSLerror(s, ERR_R_EVP_LIB);
1478 goto err;
1479 }
1480 if (!EVP_DigestSignUpdate(md_ctx, s->s3->server_random,
1481 SSL3_RANDOM_SIZE)) {
1482 SSLerror(s, ERR_R_EVP_LIB);
1483 goto err;
1484 }
1485 if (!EVP_DigestSignUpdate(md_ctx, params, params_len)) {
1486 SSLerror(s, ERR_R_EVP_LIB);
1487 goto err;
1488 }
1489 if (!EVP_DigestSignFinal(md_ctx, NULL, &signature_len) ||
1490 !signature_len) {
1491 SSLerror(s, ERR_R_EVP_LIB);
1492 goto err;
1493 }
1494 if ((signature = calloc(1, signature_len)) == NULL) {
1495 SSLerror(s, ERR_R_MALLOC_FAILURE);
1496 goto err;
1497 }
1498 if (!EVP_DigestSignFinal(md_ctx, signature, &signature_len)) {
1499 SSLerror(s, ERR_R_EVP_LIB);
1500 goto err;
1501 }
1502
1503 if (!CBB_add_u16_length_prefixed(&server_kex,
1504 &cbb_signature))
1505 goto err;
1506 if (!CBB_add_bytes(&cbb_signature, signature,
1507 signature_len))
1508 goto err;
1509 }
1510
1511 if (!ssl3_handshake_msg_finish(s, &cbb))
1512 goto err;
1513
1514 s->s3->hs.state = SSL3_ST_SW_KEY_EXCH_B;
1515 }
1516
1517 EVP_MD_CTX_free(md_ctx);
1518 free(params);
1519 free(signature);
1520
1521 return (ssl3_handshake_write(s));
1522
1523 fatal_err:
1524 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1525 err:
1526 CBB_cleanup(&cbb_params);
1527 CBB_cleanup(&cbb);
1528 EVP_MD_CTX_free(md_ctx);
1529 free(params);
1530 free(signature);
1531
1532 return (-1);
1533}
1534
1535int
1536ssl3_send_certificate_request(SSL *s)
1537{
1538 CBB cbb, cert_request, cert_types, sigalgs, cert_auth, dn;
1539 STACK_OF(X509_NAME) *sk = NULL;
1540 X509_NAME *name;
1541 int i;
1542
1543 /*
1544 * Certificate Request - RFC 5246 section 7.4.4.
1545 */
1546
1547 memset(&cbb, 0, sizeof(cbb));
1548
1549 if (s->s3->hs.state == SSL3_ST_SW_CERT_REQ_A) {
1550 if (!ssl3_handshake_msg_start(s, &cbb, &cert_request,
1551 SSL3_MT_CERTIFICATE_REQUEST))
1552 goto err;
1553
1554 if (!CBB_add_u8_length_prefixed(&cert_request, &cert_types))
1555 goto err;
1556 if (!ssl3_get_req_cert_types(s, &cert_types))
1557 goto err;
1558
1559 if (SSL_USE_SIGALGS(s)) {
1560 if (!CBB_add_u16_length_prefixed(&cert_request,
1561 &sigalgs))
1562 goto err;
1563 if (!ssl_sigalgs_build(
1564 s->s3->hs.negotiated_tls_version, &sigalgs))
1565 goto err;
1566 }
1567
1568 if (!CBB_add_u16_length_prefixed(&cert_request, &cert_auth))
1569 goto err;
1570
1571 sk = SSL_get_client_CA_list(s);
1572 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1573 unsigned char *name_data;
1574 size_t name_len;
1575
1576 name = sk_X509_NAME_value(sk, i);
1577 name_len = i2d_X509_NAME(name, NULL);
1578
1579 if (!CBB_add_u16_length_prefixed(&cert_auth, &dn))
1580 goto err;
1581 if (!CBB_add_space(&dn, &name_data, name_len))
1582 goto err;
1583 if (i2d_X509_NAME(name, &name_data) != name_len)
1584 goto err;
1585 }
1586
1587 if (!ssl3_handshake_msg_finish(s, &cbb))
1588 goto err;
1589
1590 s->s3->hs.state = SSL3_ST_SW_CERT_REQ_B;
1591 }
1592
1593 /* SSL3_ST_SW_CERT_REQ_B */
1594 return (ssl3_handshake_write(s));
1595
1596 err:
1597 CBB_cleanup(&cbb);
1598
1599 return (-1);
1600}
1601
1602static int
1603ssl3_get_client_kex_rsa(SSL *s, CBS *cbs)
1604{
1605 unsigned char fakekey[SSL_MAX_MASTER_KEY_LENGTH];
1606 unsigned char *pms = NULL;
1607 unsigned char *p;
1608 size_t pms_len = 0;
1609 EVP_PKEY *pkey = NULL;
1610 RSA *rsa = NULL;
1611 CBS enc_pms;
1612 int decrypt_len;
1613 int al = -1;
1614
1615 arc4random_buf(fakekey, sizeof(fakekey));
1616
1617 fakekey[0] = s->s3->hs.peer_legacy_version >> 8;
1618 fakekey[1] = s->s3->hs.peer_legacy_version & 0xff;
1619
1620 pkey = s->cert->pkeys[SSL_PKEY_RSA].privatekey;
1621 if (pkey == NULL || (rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) {
1622 al = SSL_AD_HANDSHAKE_FAILURE;
1623 SSLerror(s, SSL_R_MISSING_RSA_CERTIFICATE);
1624 goto fatal_err;
1625 }
1626
1627 pms_len = RSA_size(rsa);
1628 if (pms_len < SSL_MAX_MASTER_KEY_LENGTH)
1629 goto err;
1630 if ((pms = malloc(pms_len)) == NULL)
1631 goto err;
1632 p = pms;
1633
1634 if (!CBS_get_u16_length_prefixed(cbs, &enc_pms))
1635 goto decode_err;
1636 if (CBS_len(cbs) != 0 || CBS_len(&enc_pms) != RSA_size(rsa)) {
1637 SSLerror(s, SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1638 goto err;
1639 }
1640
1641 decrypt_len = RSA_private_decrypt(CBS_len(&enc_pms), CBS_data(&enc_pms),
1642 pms, rsa, RSA_PKCS1_PADDING);
1643
1644 ERR_clear_error();
1645
1646 if (decrypt_len != SSL_MAX_MASTER_KEY_LENGTH) {
1647 al = SSL_AD_DECODE_ERROR;
1648 /* SSLerror(s, SSL_R_BAD_RSA_DECRYPT); */
1649 }
1650
1651 if ((al == -1) && !((pms[0] == (s->s3->hs.peer_legacy_version >> 8)) &&
1652 (pms[1] == (s->s3->hs.peer_legacy_version & 0xff)))) {
1653 /*
1654 * The premaster secret must contain the same version number
1655 * as the ClientHello to detect version rollback attacks
1656 * (strangely, the protocol does not offer such protection for
1657 * DH ciphersuites).
1658 *
1659 * The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1660 * (http://eprint.iacr.org/2003/052/) exploits the version
1661 * number check as a "bad version oracle" -- an alert would
1662 * reveal that the plaintext corresponding to some ciphertext
1663 * made up by the adversary is properly formatted except that
1664 * the version number is wrong. To avoid such attacks, we should
1665 * treat this just like any other decryption error.
1666 */
1667 al = SSL_AD_DECODE_ERROR;
1668 /* SSLerror(s, SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1669 }
1670
1671 if (al != -1) {
1672 /*
1673 * Some decryption failure -- use random value instead
1674 * as countermeasure against Bleichenbacher's attack
1675 * on PKCS #1 v1.5 RSA padding (see RFC 2246,
1676 * section 7.4.7.1).
1677 */
1678 p = fakekey;
1679 }
1680
1681 if (!tls12_derive_master_secret(s, p, SSL_MAX_MASTER_KEY_LENGTH))
1682 goto err;
1683
1684 freezero(pms, pms_len);
1685
1686 return 1;
1687
1688 decode_err:
1689 al = SSL_AD_DECODE_ERROR;
1690 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1691 fatal_err:
1692 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1693 err:
1694 freezero(pms, pms_len);
1695
1696 return 0;
1697}
1698
1699static int
1700ssl3_get_client_kex_dhe(SSL *s, CBS *cbs)
1701{
1702 uint8_t *key = NULL;
1703 size_t key_len = 0;
1704 int decode_error, invalid_key;
1705 int ret = 0;
1706
1707 if (s->s3->hs.key_share == NULL) {
1708 SSLerror(s, SSL_R_MISSING_TMP_DH_KEY);
1709 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1710 goto err;
1711 }
1712
1713 if (!tls_key_share_peer_public(s->s3->hs.key_share, cbs,
1714 &decode_error, &invalid_key)) {
1715 if (decode_error) {
1716 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1717 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1718 }
1719 goto err;
1720 }
1721 if (invalid_key) {
1722 SSLerror(s, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1723 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
1724 goto err;
1725 }
1726
1727 if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len))
1728 goto err;
1729
1730 if (!tls12_derive_master_secret(s, key, key_len))
1731 goto err;
1732
1733 ret = 1;
1734
1735 err:
1736 freezero(key, key_len);
1737
1738 return ret;
1739}
1740
1741static int
1742ssl3_get_client_kex_ecdhe(SSL *s, CBS *cbs)
1743{
1744 uint8_t *key = NULL;
1745 size_t key_len = 0;
1746 int decode_error;
1747 CBS public;
1748 int ret = 0;
1749
1750 if (s->s3->hs.key_share == NULL) {
1751 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1752 SSLerror(s, SSL_R_MISSING_TMP_DH_KEY);
1753 goto err;
1754 }
1755
1756 if (!CBS_get_u8_length_prefixed(cbs, &public)) {
1757 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1758 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1759 goto err;
1760 }
1761 if (!tls_key_share_peer_public(s->s3->hs.key_share, &public,
1762 &decode_error, NULL)) {
1763 if (decode_error) {
1764 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1765 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1766 }
1767 goto err;
1768 }
1769
1770 if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len))
1771 goto err;
1772
1773 if (!tls12_derive_master_secret(s, key, key_len))
1774 goto err;
1775
1776 ret = 1;
1777
1778 err:
1779 freezero(key, key_len);
1780
1781 return ret;
1782}
1783
1784static int
1785ssl3_get_client_kex_gost(SSL *s, CBS *cbs)
1786{
1787 unsigned char premaster_secret[32];
1788 EVP_PKEY_CTX *pkey_ctx = NULL;
1789 EVP_PKEY *client_pubkey;
1790 EVP_PKEY *pkey = NULL;
1791 size_t outlen;
1792 CBS gostblob;
1793
1794 /* Get our certificate private key*/
1795 if ((s->s3->hs.cipher->algorithm_auth & SSL_aGOST01) != 0)
1796 pkey = s->cert->pkeys[SSL_PKEY_GOST01].privatekey;
1797
1798 if ((pkey_ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL)
1799 goto err;
1800 if (EVP_PKEY_decrypt_init(pkey_ctx) <= 0)
1801 goto err;
1802
1803 /*
1804 * If client certificate is present and is of the same type,
1805 * maybe use it for key exchange.
1806 * Don't mind errors from EVP_PKEY_derive_set_peer, because
1807 * it is completely valid to use a client certificate for
1808 * authorization only.
1809 */
1810 if ((client_pubkey = X509_get0_pubkey(s->session->peer_cert)) != NULL) {
1811 if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pubkey) <= 0)
1812 ERR_clear_error();
1813 }
1814
1815 /* Decrypt session key */
1816 if (!CBS_get_asn1(cbs, &gostblob, CBS_ASN1_SEQUENCE))
1817 goto decode_err;
1818 if (CBS_len(cbs) != 0)
1819 goto decode_err;
1820 outlen = sizeof(premaster_secret);
1821 if (EVP_PKEY_decrypt(pkey_ctx, premaster_secret, &outlen,
1822 CBS_data(&gostblob), CBS_len(&gostblob)) <= 0) {
1823 SSLerror(s, SSL_R_DECRYPTION_FAILED);
1824 goto err;
1825 }
1826
1827 if (!tls12_derive_master_secret(s, premaster_secret,
1828 sizeof(premaster_secret)))
1829 goto err;
1830
1831 /* Check if pubkey from client certificate was used */
1832 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY,
1833 2, NULL) > 0)
1834 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
1835
1836 explicit_bzero(premaster_secret, sizeof(premaster_secret));
1837 EVP_PKEY_CTX_free(pkey_ctx);
1838
1839 return 1;
1840
1841 decode_err:
1842 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1843 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1844 err:
1845 explicit_bzero(premaster_secret, sizeof(premaster_secret));
1846 EVP_PKEY_CTX_free(pkey_ctx);
1847
1848 return 0;
1849}
1850
1851int
1852ssl3_get_client_key_exchange(SSL *s)
1853{
1854 unsigned long alg_k;
1855 int al, ret;
1856 CBS cbs;
1857
1858 /* 2048 maxlen is a guess. How long a key does that permit? */
1859 if ((ret = ssl3_get_message(s, SSL3_ST_SR_KEY_EXCH_A,
1860 SSL3_ST_SR_KEY_EXCH_B, SSL3_MT_CLIENT_KEY_EXCHANGE, 2048)) <= 0)
1861 return ret;
1862
1863 if (s->internal->init_num < 0)
1864 goto err;
1865
1866 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
1867
1868 alg_k = s->s3->hs.cipher->algorithm_mkey;
1869
1870 if (alg_k & SSL_kRSA) {
1871 if (!ssl3_get_client_kex_rsa(s, &cbs))
1872 goto err;
1873 } else if (alg_k & SSL_kDHE) {
1874 if (!ssl3_get_client_kex_dhe(s, &cbs))
1875 goto err;
1876 } else if (alg_k & SSL_kECDHE) {
1877 if (!ssl3_get_client_kex_ecdhe(s, &cbs))
1878 goto err;
1879 } else if (alg_k & SSL_kGOST) {
1880 if (!ssl3_get_client_kex_gost(s, &cbs))
1881 goto err;
1882 } else {
1883 al = SSL_AD_HANDSHAKE_FAILURE;
1884 SSLerror(s, SSL_R_UNKNOWN_CIPHER_TYPE);
1885 goto fatal_err;
1886 }
1887
1888 if (CBS_len(&cbs) != 0) {
1889 al = SSL_AD_DECODE_ERROR;
1890 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1891 goto fatal_err;
1892 }
1893
1894 return (1);
1895
1896 fatal_err:
1897 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1898 err:
1899 return (-1);
1900}
1901
1902int
1903ssl3_get_cert_verify(SSL *s)
1904{
1905 CBS cbs, signature;
1906 const struct ssl_sigalg *sigalg = NULL;
1907 uint16_t sigalg_value = SIGALG_NONE;
1908 EVP_PKEY *pkey;
1909 X509 *peer_cert = NULL;
1910 EVP_MD_CTX *mctx = NULL;
1911 int al, verify;
1912 const unsigned char *hdata;
1913 size_t hdatalen;
1914 int type = 0;
1915 int ret;
1916
1917 if ((ret = ssl3_get_message(s, SSL3_ST_SR_CERT_VRFY_A,
1918 SSL3_ST_SR_CERT_VRFY_B, -1, SSL3_RT_MAX_PLAIN_LENGTH)) <= 0)
1919 return ret;
1920
1921 ret = 0;
1922
1923 if (s->internal->init_num < 0)
1924 goto err;
1925
1926 if ((mctx = EVP_MD_CTX_new()) == NULL)
1927 goto err;
1928
1929 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
1930
1931 peer_cert = s->session->peer_cert;
1932 pkey = X509_get0_pubkey(peer_cert);
1933 type = X509_certificate_type(peer_cert, pkey);
1934
1935 if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE_VERIFY) {
1936 s->s3->hs.tls12.reuse_message = 1;
1937 if (peer_cert != NULL) {
1938 al = SSL_AD_UNEXPECTED_MESSAGE;
1939 SSLerror(s, SSL_R_MISSING_VERIFY_MESSAGE);
1940 goto fatal_err;
1941 }
1942 ret = 1;
1943 goto end;
1944 }
1945
1946 if (peer_cert == NULL) {
1947 SSLerror(s, SSL_R_NO_CLIENT_CERT_RECEIVED);
1948 al = SSL_AD_UNEXPECTED_MESSAGE;
1949 goto fatal_err;
1950 }
1951
1952 if (!(type & EVP_PKT_SIGN)) {
1953 SSLerror(s, SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1954 al = SSL_AD_ILLEGAL_PARAMETER;
1955 goto fatal_err;
1956 }
1957
1958 if (s->s3->change_cipher_spec) {
1959 SSLerror(s, SSL_R_CCS_RECEIVED_EARLY);
1960 al = SSL_AD_UNEXPECTED_MESSAGE;
1961 goto fatal_err;
1962 }
1963
1964 if (SSL_USE_SIGALGS(s)) {
1965 if (!CBS_get_u16(&cbs, &sigalg_value))
1966 goto decode_err;
1967 }
1968 if (!CBS_get_u16_length_prefixed(&cbs, &signature))
1969 goto err;
1970 if (CBS_len(&cbs) != 0) {
1971 al = SSL_AD_DECODE_ERROR;
1972 SSLerror(s, SSL_R_EXTRA_DATA_IN_MESSAGE);
1973 goto fatal_err;
1974 }
1975
1976 if (CBS_len(&signature) > EVP_PKEY_size(pkey)) {
1977 SSLerror(s, SSL_R_WRONG_SIGNATURE_SIZE);
1978 al = SSL_AD_DECODE_ERROR;
1979 goto fatal_err;
1980 }
1981
1982 if ((sigalg = ssl_sigalg_for_peer(s, pkey,
1983 sigalg_value)) == NULL) {
1984 al = SSL_AD_DECODE_ERROR;
1985 goto fatal_err;
1986 }
1987 s->s3->hs.peer_sigalg = sigalg;
1988
1989 if (SSL_USE_SIGALGS(s)) {
1990 EVP_PKEY_CTX *pctx;
1991
1992 if (!tls1_transcript_data(s, &hdata, &hdatalen)) {
1993 SSLerror(s, ERR_R_INTERNAL_ERROR);
1994 al = SSL_AD_INTERNAL_ERROR;
1995 goto fatal_err;
1996 }
1997 if (!EVP_DigestVerifyInit(mctx, &pctx, sigalg->md(),
1998 NULL, pkey)) {
1999 SSLerror(s, ERR_R_EVP_LIB);
2000 al = SSL_AD_INTERNAL_ERROR;
2001 goto fatal_err;
2002 }
2003 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
2004 (!EVP_PKEY_CTX_set_rsa_padding(pctx,
2005 RSA_PKCS1_PSS_PADDING) ||
2006 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) {
2007 al = SSL_AD_INTERNAL_ERROR;
2008 goto fatal_err;
2009 }
2010 if (sigalg->key_type == EVP_PKEY_GOSTR01 &&
2011 EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_VERIFY,
2012 EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE,
2013 NULL) <= 0) {
2014 al = SSL_AD_INTERNAL_ERROR;
2015 goto fatal_err;
2016 }
2017 if (!EVP_DigestVerifyUpdate(mctx, hdata, hdatalen)) {
2018 SSLerror(s, ERR_R_EVP_LIB);
2019 al = SSL_AD_INTERNAL_ERROR;
2020 goto fatal_err;
2021 }
2022 if (EVP_DigestVerifyFinal(mctx, CBS_data(&signature),
2023 CBS_len(&signature)) <= 0) {
2024 al = SSL_AD_DECRYPT_ERROR;
2025 SSLerror(s, SSL_R_BAD_SIGNATURE);
2026 goto fatal_err;
2027 }
2028 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
2029 RSA *rsa;
2030
2031 if ((rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) {
2032 al = SSL_AD_INTERNAL_ERROR;
2033 SSLerror(s, ERR_R_EVP_LIB);
2034 goto fatal_err;
2035 }
2036 verify = RSA_verify(NID_md5_sha1, s->s3->hs.tls12.cert_verify,
2037 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, CBS_data(&signature),
2038 CBS_len(&signature), rsa);
2039 if (verify < 0) {
2040 al = SSL_AD_DECRYPT_ERROR;
2041 SSLerror(s, SSL_R_BAD_RSA_DECRYPT);
2042 goto fatal_err;
2043 }
2044 if (verify == 0) {
2045 al = SSL_AD_DECRYPT_ERROR;
2046 SSLerror(s, SSL_R_BAD_RSA_SIGNATURE);
2047 goto fatal_err;
2048 }
2049 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_EC) {
2050 EC_KEY *eckey;
2051
2052 if ((eckey = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) {
2053 al = SSL_AD_INTERNAL_ERROR;
2054 SSLerror(s, ERR_R_EVP_LIB);
2055 goto fatal_err;
2056 }
2057 verify = ECDSA_verify(0,
2058 &(s->s3->hs.tls12.cert_verify[MD5_DIGEST_LENGTH]),
2059 SHA_DIGEST_LENGTH, CBS_data(&signature),
2060 CBS_len(&signature), eckey);
2061 if (verify <= 0) {
2062 al = SSL_AD_DECRYPT_ERROR;
2063 SSLerror(s, SSL_R_BAD_ECDSA_SIGNATURE);
2064 goto fatal_err;
2065 }
2066#ifndef OPENSSL_NO_GOST
2067 } else if (EVP_PKEY_id(pkey) == NID_id_GostR3410_94 ||
2068 EVP_PKEY_id(pkey) == NID_id_GostR3410_2001) {
2069 unsigned char sigbuf[128];
2070 unsigned int siglen = sizeof(sigbuf);
2071 EVP_PKEY_CTX *pctx;
2072 const EVP_MD *md;
2073 int nid;
2074
2075 if (!tls1_transcript_data(s, &hdata, &hdatalen)) {
2076 SSLerror(s, ERR_R_INTERNAL_ERROR);
2077 al = SSL_AD_INTERNAL_ERROR;
2078 goto fatal_err;
2079 }
2080 if (!EVP_PKEY_get_default_digest_nid(pkey, &nid) ||
2081 !(md = EVP_get_digestbynid(nid))) {
2082 SSLerror(s, ERR_R_EVP_LIB);
2083 al = SSL_AD_INTERNAL_ERROR;
2084 goto fatal_err;
2085 }
2086 if ((pctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
2087 SSLerror(s, ERR_R_EVP_LIB);
2088 al = SSL_AD_INTERNAL_ERROR;
2089 goto fatal_err;
2090 }
2091 if (!EVP_DigestInit_ex(mctx, md, NULL) ||
2092 !EVP_DigestUpdate(mctx, hdata, hdatalen) ||
2093 !EVP_DigestFinal(mctx, sigbuf, &siglen) ||
2094 (EVP_PKEY_verify_init(pctx) <= 0) ||
2095 (EVP_PKEY_CTX_set_signature_md(pctx, md) <= 0) ||
2096 (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_VERIFY,
2097 EVP_PKEY_CTRL_GOST_SIG_FORMAT,
2098 GOST_SIG_FORMAT_RS_LE, NULL) <= 0)) {
2099 SSLerror(s, ERR_R_EVP_LIB);
2100 al = SSL_AD_INTERNAL_ERROR;
2101 EVP_PKEY_CTX_free(pctx);
2102 goto fatal_err;
2103 }
2104 if (EVP_PKEY_verify(pctx, CBS_data(&signature),
2105 CBS_len(&signature), sigbuf, siglen) <= 0) {
2106 al = SSL_AD_DECRYPT_ERROR;
2107 SSLerror(s, SSL_R_BAD_SIGNATURE);
2108 EVP_PKEY_CTX_free(pctx);
2109 goto fatal_err;
2110 }
2111
2112 EVP_PKEY_CTX_free(pctx);
2113#endif
2114 } else {
2115 SSLerror(s, ERR_R_INTERNAL_ERROR);
2116 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
2117 goto fatal_err;
2118 }
2119
2120 ret = 1;
2121 if (0) {
2122 decode_err:
2123 al = SSL_AD_DECODE_ERROR;
2124 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
2125 fatal_err:
2126 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2127 }
2128 end:
2129 tls1_transcript_free(s);
2130 err:
2131 EVP_MD_CTX_free(mctx);
2132
2133 return (ret);
2134}
2135
2136int
2137ssl3_get_client_certificate(SSL *s)
2138{
2139 CBS cbs, client_certs;
2140 X509 *x = NULL;
2141 const unsigned char *q;
2142 STACK_OF(X509) *sk = NULL;
2143 int i, al, ret;
2144
2145 if ((ret = ssl3_get_message(s, SSL3_ST_SR_CERT_A, SSL3_ST_SR_CERT_B,
2146 -1, s->internal->max_cert_list)) <= 0)
2147 return ret;
2148
2149 ret = -1;
2150
2151 if (s->s3->hs.tls12.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) {
2152 if ((s->verify_mode & SSL_VERIFY_PEER) &&
2153 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) {
2154 SSLerror(s, SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2155 al = SSL_AD_HANDSHAKE_FAILURE;
2156 goto fatal_err;
2157 }
2158 /*
2159 * If tls asked for a client cert,
2160 * the client must return a 0 list.
2161 */
2162 if (s->s3->hs.tls12.cert_request) {
2163 SSLerror(s, SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST
2164 );
2165 al = SSL_AD_UNEXPECTED_MESSAGE;
2166 goto fatal_err;
2167 }
2168 s->s3->hs.tls12.reuse_message = 1;
2169 return (1);
2170 }
2171
2172 if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE) {
2173 al = SSL_AD_UNEXPECTED_MESSAGE;
2174 SSLerror(s, SSL_R_WRONG_MESSAGE_TYPE);
2175 goto fatal_err;
2176 }
2177
2178 if (s->internal->init_num < 0)
2179 goto decode_err;
2180
2181 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
2182
2183 if ((sk = sk_X509_new_null()) == NULL) {
2184 SSLerror(s, ERR_R_MALLOC_FAILURE);
2185 goto err;
2186 }
2187
2188 if (!CBS_get_u24_length_prefixed(&cbs, &client_certs) ||
2189 CBS_len(&cbs) != 0)
2190 goto decode_err;
2191
2192 while (CBS_len(&client_certs) > 0) {
2193 CBS cert;
2194
2195 if (!CBS_get_u24_length_prefixed(&client_certs, &cert)) {
2196 al = SSL_AD_DECODE_ERROR;
2197 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
2198 goto fatal_err;
2199 }
2200
2201 q = CBS_data(&cert);
2202 x = d2i_X509(NULL, &q, CBS_len(&cert));
2203 if (x == NULL) {
2204 SSLerror(s, ERR_R_ASN1_LIB);
2205 goto err;
2206 }
2207 if (q != CBS_data(&cert) + CBS_len(&cert)) {
2208 al = SSL_AD_DECODE_ERROR;
2209 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
2210 goto fatal_err;
2211 }
2212 if (!sk_X509_push(sk, x)) {
2213 SSLerror(s, ERR_R_MALLOC_FAILURE);
2214 goto err;
2215 }
2216 x = NULL;
2217 }
2218
2219 if (sk_X509_num(sk) <= 0) {
2220 /*
2221 * TLS does not mind 0 certs returned.
2222 * Fail for TLS only if we required a certificate.
2223 */
2224 if ((s->verify_mode & SSL_VERIFY_PEER) &&
2225 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) {
2226 SSLerror(s, SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2227 al = SSL_AD_HANDSHAKE_FAILURE;
2228 goto fatal_err;
2229 }
2230 /* No client certificate so free transcript. */
2231 tls1_transcript_free(s);
2232 } else {
2233 i = ssl_verify_cert_chain(s, sk);
2234 if (i <= 0) {
2235 al = ssl_verify_alarm_type(s->verify_result);
2236 SSLerror(s, SSL_R_NO_CERTIFICATE_RETURNED);
2237 goto fatal_err;
2238 }
2239 }
2240
2241 X509_free(s->session->peer_cert);
2242 s->session->peer_cert = sk_X509_shift(sk);
2243
2244 /*
2245 * Inconsistency alert: cert_chain does *not* include the
2246 * peer's own certificate, while we do include it in s3_clnt.c
2247 */
2248 sk_X509_pop_free(s->session->cert_chain, X509_free);
2249 s->session->cert_chain = sk;
2250 sk = NULL;
2251
2252 s->session->verify_result = s->verify_result;
2253
2254 ret = 1;
2255 if (0) {
2256 decode_err:
2257 al = SSL_AD_DECODE_ERROR;
2258 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
2259 fatal_err:
2260 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2261 }
2262 err:
2263 X509_free(x);
2264 sk_X509_pop_free(sk, X509_free);
2265
2266 return (ret);
2267}
2268
2269int
2270ssl3_send_server_certificate(SSL *s)
2271{
2272 CBB cbb, server_cert;
2273 SSL_CERT_PKEY *cpk;
2274
2275 /*
2276 * Server Certificate - RFC 5246, section 7.4.2.
2277 */
2278
2279 memset(&cbb, 0, sizeof(cbb));
2280
2281 if (s->s3->hs.state == SSL3_ST_SW_CERT_A) {
2282 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) {
2283 SSLerror(s, ERR_R_INTERNAL_ERROR);
2284 return (0);
2285 }
2286
2287 if (!ssl3_handshake_msg_start(s, &cbb, &server_cert,
2288 SSL3_MT_CERTIFICATE))
2289 goto err;
2290 if (!ssl3_output_cert_chain(s, &server_cert, cpk))
2291 goto err;
2292 if (!ssl3_handshake_msg_finish(s, &cbb))
2293 goto err;
2294
2295 s->s3->hs.state = SSL3_ST_SW_CERT_B;
2296 }
2297
2298 /* SSL3_ST_SW_CERT_B */
2299 return (ssl3_handshake_write(s));
2300
2301 err:
2302 CBB_cleanup(&cbb);
2303
2304 return (0);
2305}
2306
2307/* send a new session ticket (not necessarily for a new session) */
2308int
2309ssl3_send_newsession_ticket(SSL *s)
2310{
2311 CBB cbb, session_ticket, ticket;
2312 SSL_CTX *tctx = s->initial_ctx;
2313 size_t enc_session_len, enc_session_max_len, hmac_len;
2314 size_t session_len = 0;
2315 unsigned char *enc_session = NULL, *session = NULL;
2316 unsigned char iv[EVP_MAX_IV_LENGTH];
2317 unsigned char key_name[16];
2318 unsigned char *hmac;
2319 unsigned int hlen;
2320 EVP_CIPHER_CTX *ctx = NULL;
2321 HMAC_CTX *hctx = NULL;
2322 int len;
2323
2324 /*
2325 * New Session Ticket - RFC 5077, section 3.3.
2326 */
2327
2328 memset(&cbb, 0, sizeof(cbb));
2329
2330 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
2331 goto err;
2332 if ((hctx = HMAC_CTX_new()) == NULL)
2333 goto err;
2334
2335 if (s->s3->hs.state == SSL3_ST_SW_SESSION_TICKET_A) {
2336 if (!ssl3_handshake_msg_start(s, &cbb, &session_ticket,
2337 SSL3_MT_NEWSESSION_TICKET))
2338 goto err;
2339
2340 if (!SSL_SESSION_ticket(s->session, &session, &session_len))
2341 goto err;
2342 if (session_len > 0xffff)
2343 goto err;
2344
2345 /*
2346 * Initialize HMAC and cipher contexts. If callback is present
2347 * it does all the work, otherwise use generated values from
2348 * parent context.
2349 */
2350 if (tctx->internal->tlsext_ticket_key_cb != NULL) {
2351 if (tctx->internal->tlsext_ticket_key_cb(s,
2352 key_name, iv, ctx, hctx, 1) < 0)
2353 goto err;
2354 } else {
2355 arc4random_buf(iv, 16);
2356 EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL,
2357 tctx->internal->tlsext_tick_aes_key, iv);
2358 HMAC_Init_ex(hctx, tctx->internal->tlsext_tick_hmac_key,
2359 16, EVP_sha256(), NULL);
2360 memcpy(key_name, tctx->internal->tlsext_tick_key_name, 16);
2361 }
2362
2363 /* Encrypt the session state. */
2364 enc_session_max_len = session_len + EVP_MAX_BLOCK_LENGTH;
2365 if ((enc_session = calloc(1, enc_session_max_len)) == NULL)
2366 goto err;
2367 enc_session_len = 0;
2368 if (!EVP_EncryptUpdate(ctx, enc_session, &len, session,
2369 session_len))
2370 goto err;
2371 enc_session_len += len;
2372 if (!EVP_EncryptFinal_ex(ctx, enc_session + enc_session_len,
2373 &len))
2374 goto err;
2375 enc_session_len += len;
2376
2377 if (enc_session_len > enc_session_max_len)
2378 goto err;
2379
2380 /* Generate the HMAC. */
2381 if (!HMAC_Update(hctx, key_name, sizeof(key_name)))
2382 goto err;
2383 if (!HMAC_Update(hctx, iv, EVP_CIPHER_CTX_iv_length(ctx)))
2384 goto err;
2385 if (!HMAC_Update(hctx, enc_session, enc_session_len))
2386 goto err;
2387
2388 if ((hmac_len = HMAC_size(hctx)) <= 0)
2389 goto err;
2390
2391 /*
2392 * Ticket lifetime hint (advisory only):
2393 * We leave this unspecified for resumed session
2394 * (for simplicity), and guess that tickets for new
2395 * sessions will live as long as their sessions.
2396 */
2397 if (!CBB_add_u32(&session_ticket,
2398 s->internal->hit ? 0 : s->session->timeout))
2399 goto err;
2400
2401 if (!CBB_add_u16_length_prefixed(&session_ticket, &ticket))
2402 goto err;
2403 if (!CBB_add_bytes(&ticket, key_name, sizeof(key_name)))
2404 goto err;
2405 if (!CBB_add_bytes(&ticket, iv, EVP_CIPHER_CTX_iv_length(ctx)))
2406 goto err;
2407 if (!CBB_add_bytes(&ticket, enc_session, enc_session_len))
2408 goto err;
2409 if (!CBB_add_space(&ticket, &hmac, hmac_len))
2410 goto err;
2411
2412 if (!HMAC_Final(hctx, hmac, &hlen))
2413 goto err;
2414 if (hlen != hmac_len)
2415 goto err;
2416
2417 if (!ssl3_handshake_msg_finish(s, &cbb))
2418 goto err;
2419
2420 s->s3->hs.state = SSL3_ST_SW_SESSION_TICKET_B;
2421 }
2422
2423 EVP_CIPHER_CTX_free(ctx);
2424 HMAC_CTX_free(hctx);
2425 freezero(session, session_len);
2426 free(enc_session);
2427
2428 /* SSL3_ST_SW_SESSION_TICKET_B */
2429 return (ssl3_handshake_write(s));
2430
2431 err:
2432 CBB_cleanup(&cbb);
2433 EVP_CIPHER_CTX_free(ctx);
2434 HMAC_CTX_free(hctx);
2435 freezero(session, session_len);
2436 free(enc_session);
2437
2438 return (-1);
2439}
2440
2441int
2442ssl3_send_cert_status(SSL *s)
2443{
2444 CBB cbb, certstatus, ocspresp;
2445
2446 memset(&cbb, 0, sizeof(cbb));
2447
2448 if (s->s3->hs.state == SSL3_ST_SW_CERT_STATUS_A) {
2449 if (!ssl3_handshake_msg_start(s, &cbb, &certstatus,
2450 SSL3_MT_CERTIFICATE_STATUS))
2451 goto err;
2452 if (!CBB_add_u8(&certstatus, s->tlsext_status_type))
2453 goto err;
2454 if (!CBB_add_u24_length_prefixed(&certstatus, &ocspresp))
2455 goto err;
2456 if (!CBB_add_bytes(&ocspresp, s->internal->tlsext_ocsp_resp,
2457 s->internal->tlsext_ocsp_resp_len))
2458 goto err;
2459 if (!ssl3_handshake_msg_finish(s, &cbb))
2460 goto err;
2461
2462 s->s3->hs.state = SSL3_ST_SW_CERT_STATUS_B;
2463 }
2464
2465 /* SSL3_ST_SW_CERT_STATUS_B */
2466 return (ssl3_handshake_write(s));
2467
2468 err:
2469 CBB_cleanup(&cbb);
2470
2471 return (-1);
2472}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-14 05:54:07 +0000