2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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.
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.
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.
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
152 #include "ssl_locl.h"
153 #include <openssl/buffer.h>
154 #include <openssl/rand.h>
155 #include <openssl/objects.h>
156 #include <openssl/evp.h>
157 #include <openssl/md5.h>
158 #ifndef OPENSSL_NO_DH
159 # include <openssl/dh.h>
161 #include <openssl/bn.h>
162 #ifndef OPENSSL_NO_ENGINE
163 # include <openssl/engine.h>
166 static int ssl_set_version(SSL *s);
167 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
168 static int ssl3_check_change(SSL *s);
169 static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
173 int ssl3_connect(SSL *s)
176 unsigned long Time = (unsigned long)time(NULL);
177 void (*cb) (const SSL *ssl, int type, int val) = NULL;
179 int new_state, state, skip = 0;
181 RAND_add(&Time, sizeof(Time), 0);
185 if (s->info_callback != NULL)
186 cb = s->info_callback;
187 else if (s->ctx->info_callback != NULL)
188 cb = s->ctx->info_callback;
191 if (!SSL_in_init(s) || SSL_in_before(s)) {
196 #ifndef OPENSSL_NO_HEARTBEATS
198 * If we're awaiting a HeartbeatResponse, pretend we already got and
199 * don't await it anymore, because Heartbeats don't make sense during
202 if (s->tlsext_hb_pending) {
203 s->tlsext_hb_pending = 0;
212 case SSL_ST_RENEGOTIATE:
214 s->state = SSL_ST_CONNECT;
215 s->ctx->stats.sess_connect_renegotiate++;
219 case SSL_ST_BEFORE | SSL_ST_CONNECT:
220 case SSL_ST_OK | SSL_ST_CONNECT:
224 cb(s, SSL_CB_HANDSHAKE_START, 1);
226 if ((s->version >> 8) != SSL3_VERSION_MAJOR
227 && s->version != TLS_ANY_VERSION) {
228 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
229 s->state = SSL_ST_ERR;
234 if (s->version != TLS_ANY_VERSION &&
235 !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
236 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
240 /* s->version=SSL3_VERSION; */
241 s->type = SSL_ST_CONNECT;
243 if (s->init_buf == NULL) {
244 if ((buf = BUF_MEM_new()) == NULL) {
246 s->state = SSL_ST_ERR;
249 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
251 s->state = SSL_ST_ERR;
258 if (!ssl3_setup_buffers(s)) {
263 /* setup buffing BIO */
264 if (!ssl_init_wbio_buffer(s, 0)) {
266 s->state = SSL_ST_ERR;
270 /* don't push the buffering BIO quite yet */
272 ssl3_init_finished_mac(s);
274 s->state = SSL3_ST_CW_CLNT_HELLO_A;
275 s->ctx->stats.sess_connect++;
278 * Should have been reset by ssl3_get_finished, too.
280 s->s3->change_cipher_spec = 0;
283 case SSL3_ST_CW_CLNT_HELLO_A:
284 case SSL3_ST_CW_CLNT_HELLO_B:
287 ret = ssl3_client_hello(s);
290 s->state = SSL3_ST_CR_SRVR_HELLO_A;
293 /* turn on buffering for the next lot of output */
294 if (s->bbio != s->wbio)
295 s->wbio = BIO_push(s->bbio, s->wbio);
299 case SSL3_ST_CR_SRVR_HELLO_A:
300 case SSL3_ST_CR_SRVR_HELLO_B:
301 ret = ssl3_get_server_hello(s);
306 s->state = SSL3_ST_CR_CHANGE_A;
307 if (s->tlsext_ticket_expected) {
308 /* receive renewed session ticket */
309 s->state = SSL3_ST_CR_SESSION_TICKET_A;
312 s->state = SSL3_ST_CR_CERT_A;
316 case SSL3_ST_CR_CERT_A:
317 case SSL3_ST_CR_CERT_B:
318 /* Noop (ret = 0) for everything but EAP-FAST. */
319 ret = ssl3_check_change(s);
324 s->state = SSL3_ST_CR_CHANGE_A;
329 /* Check if it is anon DH/ECDH, SRP auth */
331 if (!(s->s3->tmp.new_cipher->algorithm_auth &
332 (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
333 ret = ssl3_get_server_certificate(s);
337 if (s->tlsext_status_expected)
338 s->state = SSL3_ST_CR_CERT_STATUS_A;
340 s->state = SSL3_ST_CR_KEY_EXCH_A;
343 s->state = SSL3_ST_CR_KEY_EXCH_A;
349 case SSL3_ST_CR_KEY_EXCH_A:
350 case SSL3_ST_CR_KEY_EXCH_B:
351 ret = ssl3_get_key_exchange(s);
354 s->state = SSL3_ST_CR_CERT_REQ_A;
358 * at this point we check that we have the required stuff from
361 if (!ssl3_check_cert_and_algorithm(s)) {
363 s->state = SSL_ST_ERR;
368 case SSL3_ST_CR_CERT_REQ_A:
369 case SSL3_ST_CR_CERT_REQ_B:
370 ret = ssl3_get_certificate_request(s);
373 s->state = SSL3_ST_CR_SRVR_DONE_A;
377 case SSL3_ST_CR_SRVR_DONE_A:
378 case SSL3_ST_CR_SRVR_DONE_B:
379 ret = ssl3_get_server_done(s);
382 #ifndef OPENSSL_NO_SRP
383 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
384 if ((ret = SRP_Calc_A_param(s)) <= 0) {
385 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC);
386 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
387 s->state = SSL_ST_ERR;
392 if (s->s3->tmp.cert_req)
393 s->state = SSL3_ST_CW_CERT_A;
395 s->state = SSL3_ST_CW_KEY_EXCH_A;
400 case SSL3_ST_CW_CERT_A:
401 case SSL3_ST_CW_CERT_B:
402 case SSL3_ST_CW_CERT_C:
403 case SSL3_ST_CW_CERT_D:
404 ret = ssl3_send_client_certificate(s);
407 s->state = SSL3_ST_CW_KEY_EXCH_A;
411 case SSL3_ST_CW_KEY_EXCH_A:
412 case SSL3_ST_CW_KEY_EXCH_B:
413 ret = ssl3_send_client_key_exchange(s);
417 * EAY EAY EAY need to check for DH fix cert sent back
420 * For TLS, cert_req is set to 2, so a cert chain of nothing is
421 * sent, but no verify packet is sent
424 * XXX: For now, we do not support client authentication in ECDH
425 * cipher suites with ECDH (rather than ECDSA) certificates. We
426 * need to skip the certificate verify message when client's
427 * ECDH public key is sent inside the client certificate.
429 if (s->s3->tmp.cert_req == 1) {
430 s->state = SSL3_ST_CW_CERT_VRFY_A;
432 s->state = SSL3_ST_CW_CHANGE_A;
434 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
435 s->state = SSL3_ST_CW_CHANGE_A;
441 case SSL3_ST_CW_CERT_VRFY_A:
442 case SSL3_ST_CW_CERT_VRFY_B:
443 ret = ssl3_send_client_verify(s);
446 s->state = SSL3_ST_CW_CHANGE_A;
450 case SSL3_ST_CW_CHANGE_A:
451 case SSL3_ST_CW_CHANGE_B:
452 ret = ssl3_send_change_cipher_spec(s,
454 SSL3_ST_CW_CHANGE_B);
458 #if defined(OPENSSL_NO_NEXTPROTONEG)
459 s->state = SSL3_ST_CW_FINISHED_A;
461 if (s->s3->next_proto_neg_seen)
462 s->state = SSL3_ST_CW_NEXT_PROTO_A;
464 s->state = SSL3_ST_CW_FINISHED_A;
468 s->session->cipher = s->s3->tmp.new_cipher;
469 #ifdef OPENSSL_NO_COMP
470 s->session->compress_meth = 0;
472 if (s->s3->tmp.new_compression == NULL)
473 s->session->compress_meth = 0;
475 s->session->compress_meth = s->s3->tmp.new_compression->id;
477 if (!s->method->ssl3_enc->setup_key_block(s)) {
479 s->state = SSL_ST_ERR;
483 if (!s->method->ssl3_enc->change_cipher_state(s,
484 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
487 s->state = SSL_ST_ERR;
493 #if !defined(OPENSSL_NO_NEXTPROTONEG)
494 case SSL3_ST_CW_NEXT_PROTO_A:
495 case SSL3_ST_CW_NEXT_PROTO_B:
496 ret = ssl3_send_next_proto(s);
499 s->state = SSL3_ST_CW_FINISHED_A;
503 case SSL3_ST_CW_FINISHED_A:
504 case SSL3_ST_CW_FINISHED_B:
505 ret = ssl3_send_finished(s,
506 SSL3_ST_CW_FINISHED_A,
507 SSL3_ST_CW_FINISHED_B,
509 ssl3_enc->client_finished_label,
511 ssl3_enc->client_finished_label_len);
514 s->state = SSL3_ST_CW_FLUSH;
517 s->s3->tmp.next_state = SSL_ST_OK;
520 * Allow NewSessionTicket if ticket expected
522 if (s->tlsext_ticket_expected)
523 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
525 s->s3->tmp.next_state = SSL3_ST_CR_CHANGE_A;
530 case SSL3_ST_CR_SESSION_TICKET_A:
531 case SSL3_ST_CR_SESSION_TICKET_B:
532 ret = ssl3_get_new_session_ticket(s);
535 s->state = SSL3_ST_CR_CHANGE_A;
539 case SSL3_ST_CR_CERT_STATUS_A:
540 case SSL3_ST_CR_CERT_STATUS_B:
541 ret = ssl3_get_cert_status(s);
544 s->state = SSL3_ST_CR_KEY_EXCH_A;
548 case SSL3_ST_CR_CHANGE_A:
549 case SSL3_ST_CR_CHANGE_B:
550 ret = ssl3_get_change_cipher_spec(s, SSL3_ST_CR_CHANGE_A,
551 SSL3_ST_CR_CHANGE_B);
555 s->state = SSL3_ST_CR_FINISHED_A;
559 case SSL3_ST_CR_FINISHED_A:
560 case SSL3_ST_CR_FINISHED_B:
561 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
562 SSL3_ST_CR_FINISHED_B);
567 s->state = SSL3_ST_CW_CHANGE_A;
569 s->state = SSL_ST_OK;
573 case SSL3_ST_CW_FLUSH:
574 s->rwstate = SSL_WRITING;
575 if (BIO_flush(s->wbio) <= 0) {
579 s->rwstate = SSL_NOTHING;
580 s->state = s->s3->tmp.next_state;
584 /* clean a few things up */
585 ssl3_cleanup_key_block(s);
586 BUF_MEM_free(s->init_buf);
589 /* remove the buffering */
590 ssl_free_wbio_buffer(s);
596 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
598 s->ctx->stats.sess_hit++;
602 s->handshake_func = ssl3_connect;
603 s->ctx->stats.sess_connect_good++;
606 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
613 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
619 /* did we do anything */
620 if (!s->s3->tmp.reuse_message && !skip) {
622 if ((ret = BIO_flush(s->wbio)) <= 0)
626 if ((cb != NULL) && (s->state != state)) {
627 new_state = s->state;
629 cb(s, SSL_CB_CONNECT_LOOP, 1);
630 s->state = new_state;
639 cb(s, SSL_CB_CONNECT_EXIT, ret);
644 * Work out what version we should be using for the initial ClientHello if
645 * the version is currently set to (D)TLS_ANY_VERSION.
646 * Returns 1 on success
649 static int ssl_set_version(SSL *s)
651 unsigned long mask, options = s->options;
653 if (s->method->version == TLS_ANY_VERSION) {
655 * SSL_OP_NO_X disables all protocols above X *if* there are
656 * some protocols below X enabled. This is required in order
657 * to maintain "version capability" vector contiguous. So
658 * that if application wants to disable TLS1.0 in favour of
659 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
660 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
662 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
663 #if !defined(OPENSSL_NO_SSL3)
667 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
668 if (options & SSL_OP_NO_TLSv1_2) {
669 if ((options & mask) != mask) {
670 s->version = TLS1_1_VERSION;
672 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
676 s->version = TLS1_2_VERSION;
679 if ((options & mask) == mask) {
680 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
683 s->version = TLS1_1_VERSION;
686 mask &= ~SSL_OP_NO_TLSv1_1;
687 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
688 s->version = TLS1_VERSION;
689 mask &= ~SSL_OP_NO_TLSv1;
690 #if !defined(OPENSSL_NO_SSL3)
691 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
692 s->version = SSL3_VERSION;
695 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
696 SSLerr(SSL_F_SSL_SET_VERSION,
697 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
701 if (s->version == SSL3_VERSION && FIPS_mode()) {
702 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
706 } else if (s->method->version == DTLS_ANY_VERSION) {
707 /* Determine which DTLS version to use */
708 /* If DTLS 1.2 disabled correct the version number */
709 if (options & SSL_OP_NO_DTLSv1_2) {
710 if (tls1_suiteb(s)) {
711 SSLerr(SSL_F_SSL_SET_VERSION,
712 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
716 * Disabling all versions is silly: return an error.
718 if (options & SSL_OP_NO_DTLSv1) {
719 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
723 * Update method so we don't use any DTLS 1.2 features.
725 s->method = DTLSv1_client_method();
726 s->version = DTLS1_VERSION;
729 * We only support one version: update method
731 if (options & SSL_OP_NO_DTLSv1)
732 s->method = DTLSv1_2_client_method();
733 s->version = DTLS1_2_VERSION;
737 s->client_version = s->version;
742 int ssl3_client_hello(SSL *s)
745 unsigned char *p, *d;
749 #ifndef OPENSSL_NO_COMP
754 buf = (unsigned char *)s->init_buf->data;
755 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
756 SSL_SESSION *sess = s->session;
758 /* Work out what SSL/TLS/DTLS version to use */
759 if (ssl_set_version(s) == 0)
762 if ((sess == NULL) || (sess->ssl_version != s->version) ||
764 * In the case of EAP-FAST, we can have a pre-shared
765 * "ticket" without a session ID.
767 (!sess->session_id_length && !sess->tlsext_tick) ||
768 (sess->not_resumable)) {
769 if (!ssl_get_new_session(s, 0))
772 /* else use the pre-loaded session */
774 p = s->s3->client_random;
777 * for DTLS if client_random is initialized, reuse it, we are
778 * required to use same upon reply to HelloVerify
780 if (SSL_IS_DTLS(s)) {
783 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
792 if (i && ssl_fill_hello_random(s, 0, p,
793 sizeof(s->s3->client_random)) <= 0)
796 /* Do the message type and length last */
797 d = p = ssl_handshake_start(s);
800 * version indicates the negotiated version: for example from
801 * an SSLv2/v3 compatible client hello). The client_version
802 * field is the maximum version we permit and it is also
803 * used in RSA encrypted premaster secrets. Some servers can
804 * choke if we initially report a higher version then
805 * renegotiate to a lower one in the premaster secret. This
806 * didn't happen with TLS 1.0 as most servers supported it
807 * but it can with TLS 1.1 or later if the server only supports
810 * Possible scenario with previous logic:
811 * 1. Client hello indicates TLS 1.2
812 * 2. Server hello says TLS 1.0
813 * 3. RSA encrypted premaster secret uses 1.2.
814 * 4. Handhaked proceeds using TLS 1.0.
815 * 5. Server sends hello request to renegotiate.
816 * 6. Client hello indicates TLS v1.0 as we now
817 * know that is maximum server supports.
818 * 7. Server chokes on RSA encrypted premaster secret
819 * containing version 1.0.
821 * For interoperability it should be OK to always use the
822 * maximum version we support in client hello and then rely
823 * on the checking of version to ensure the servers isn't
824 * being inconsistent: for example initially negotiating with
825 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
826 * client_version in client hello and not resetting it to
827 * the negotiated version.
829 *(p++) = s->client_version >> 8;
830 *(p++) = s->client_version & 0xff;
833 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
834 p += SSL3_RANDOM_SIZE;
840 i = s->session->session_id_length;
843 if (i > (int)sizeof(s->session->session_id)) {
844 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
847 memcpy(p, s->session->session_id, i);
851 /* cookie stuff for DTLS */
852 if (SSL_IS_DTLS(s)) {
853 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
854 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
857 *(p++) = s->d1->cookie_len;
858 memcpy(p, s->d1->cookie, s->d1->cookie_len);
859 p += s->d1->cookie_len;
862 /* Ciphers supported */
863 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
865 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
868 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
870 * Some servers hang if client hello > 256 bytes as hack workaround
871 * chop number of supported ciphers to keep it well below this if we
874 if (TLS1_get_version(s) >= TLS1_2_VERSION
875 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
876 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
882 #ifdef OPENSSL_NO_COMP
886 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
889 j = sk_SSL_COMP_num(s->ctx->comp_methods);
891 for (i = 0; i < j; i++) {
892 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
896 *(p++) = 0; /* Add the NULL method */
899 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
900 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
904 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
906 ssl3_send_alert(s, SSL3_AL_FATAL, al);
907 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
912 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
913 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
914 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
917 s->state = SSL3_ST_CW_CLNT_HELLO_B;
920 /* SSL3_ST_CW_CLNT_HELLO_B */
921 return ssl_do_write(s);
923 s->state = SSL_ST_ERR;
927 int ssl3_get_server_hello(SSL *s)
929 STACK_OF(SSL_CIPHER) *sk;
931 PACKET pkt, session_id;
932 size_t session_id_len;
933 unsigned char *cipherchars;
934 int i, al = SSL_AD_INTERNAL_ERROR, ok;
935 unsigned int compression;
937 #ifndef OPENSSL_NO_COMP
941 * Hello verify request and/or server hello version may not match so set
942 * first packet if we're negotiating version.
946 n = s->method->ssl_get_message(s,
947 SSL3_ST_CR_SRVR_HELLO_A,
948 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
954 if (SSL_IS_DTLS(s)) {
955 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
956 if (s->d1->send_cookie == 0) {
957 s->s3->tmp.reuse_message = 1;
959 } else { /* already sent a cookie */
961 al = SSL_AD_UNEXPECTED_MESSAGE;
962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
968 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
969 al = SSL_AD_UNEXPECTED_MESSAGE;
970 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
974 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
975 al = SSL_AD_INTERNAL_ERROR;
976 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
980 if (s->method->version == TLS_ANY_VERSION) {
981 unsigned int sversion;
983 if (!PACKET_get_net_2(&pkt, &sversion)) {
984 al = SSL_AD_DECODE_ERROR;
985 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
989 #if TLS_MAX_VERSION != TLS1_2_VERSION
990 #error Code needs updating for new TLS version
992 #ifndef OPENSSL_NO_SSL3
993 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
995 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
996 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
997 al = SSL_AD_PROTOCOL_VERSION;
1000 s->method = SSLv3_client_method();
1003 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
1004 s->method = TLSv1_client_method();
1005 } else if ((sversion == TLS1_1_VERSION) &&
1006 !(s->options & SSL_OP_NO_TLSv1_1)) {
1007 s->method = TLSv1_1_client_method();
1008 } else if ((sversion == TLS1_2_VERSION) &&
1009 !(s->options & SSL_OP_NO_TLSv1_2)) {
1010 s->method = TLSv1_2_client_method();
1012 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
1013 al = SSL_AD_PROTOCOL_VERSION;
1016 s->session->ssl_version = s->version = s->method->version;
1018 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
1019 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
1020 al = SSL_AD_PROTOCOL_VERSION;
1023 } else if (s->method->version == DTLS_ANY_VERSION) {
1024 /* Work out correct protocol version to use */
1025 unsigned int hversion;
1028 if (!PACKET_get_net_2(&pkt, &hversion)) {
1029 al = SSL_AD_DECODE_ERROR;
1030 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1034 options = s->options;
1035 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
1036 s->method = DTLSv1_2_client_method();
1037 else if (tls1_suiteb(s)) {
1038 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1039 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1040 s->version = hversion;
1041 al = SSL_AD_PROTOCOL_VERSION;
1043 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
1044 s->method = DTLSv1_client_method();
1046 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1047 s->version = hversion;
1048 al = SSL_AD_PROTOCOL_VERSION;
1051 s->session->ssl_version = s->version = s->method->version;
1053 unsigned char *vers;
1055 if (!PACKET_get_bytes(&pkt, &vers, 2)) {
1056 al = SSL_AD_DECODE_ERROR;
1057 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1060 if ((vers[0] != (s->version >> 8))
1061 || (vers[1] != (s->version & 0xff))) {
1062 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1063 s->version = (s->version & 0xff00) | vers[1];
1064 al = SSL_AD_PROTOCOL_VERSION;
1069 /* load the server hello data */
1070 /* load the server random */
1071 if (!PACKET_copy_bytes(&pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
1072 al = SSL_AD_DECODE_ERROR;
1073 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1079 /* Get the session-id. */
1080 if (!PACKET_get_length_prefixed_1(&pkt, &session_id)) {
1081 al = SSL_AD_DECODE_ERROR;
1082 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1085 session_id_len = PACKET_remaining(&session_id);
1086 if (session_id_len > sizeof s->session->session_id
1087 || session_id_len > SSL3_SESSION_ID_SIZE) {
1088 al = SSL_AD_ILLEGAL_PARAMETER;
1089 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1093 if (!PACKET_get_bytes(&pkt, &cipherchars, TLS_CIPHER_LEN)) {
1094 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1095 al = SSL_AD_DECODE_ERROR;
1100 * Check if we can resume the session based on external pre-shared secret.
1101 * EAP-FAST (RFC 4851) supports two types of session resumption.
1102 * Resumption based on server-side state works with session IDs.
1103 * Resumption based on pre-shared Protected Access Credentials (PACs)
1104 * works by overriding the SessionTicket extension at the application
1105 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1106 * servers would honour the session ID.) Therefore, the session ID alone
1107 * is not a reliable indicator of session resumption, so we first check if
1108 * we can resume, and later peek at the next handshake message to see if the
1109 * server wants to resume.
1111 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1112 s->session->tlsext_tick) {
1113 SSL_CIPHER *pref_cipher = NULL;
1114 s->session->master_key_length = sizeof(s->session->master_key);
1115 if (s->tls_session_secret_cb(s, s->session->master_key,
1116 &s->session->master_key_length,
1118 s->tls_session_secret_cb_arg)) {
1119 s->session->cipher = pref_cipher ?
1120 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
1122 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1123 al = SSL_AD_INTERNAL_ERROR;
1128 if (session_id_len != 0 && session_id_len == s->session->session_id_length
1129 && memcmp(PACKET_data(&session_id), s->session->session_id,
1130 session_id_len) == 0) {
1131 if (s->sid_ctx_length != s->session->sid_ctx_length
1132 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1133 /* actually a client application bug */
1134 al = SSL_AD_ILLEGAL_PARAMETER;
1135 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1136 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1142 * If we were trying for session-id reuse but the server
1143 * didn't echo the ID, make a new SSL_SESSION.
1144 * In the case of EAP-FAST and PAC, we do not send a session ID,
1145 * so the PAC-based session secret is always preserved. It'll be
1146 * overwritten if the server refuses resumption.
1148 if (s->session->session_id_length > 0) {
1149 if (!ssl_get_new_session(s, 0)) {
1154 s->session->session_id_length = session_id_len;
1155 /* session_id_len could be 0 */
1156 memcpy(s->session->session_id, PACKET_data(&session_id),
1160 c = ssl_get_cipher_by_char(s, cipherchars);
1162 /* unknown cipher */
1163 al = SSL_AD_ILLEGAL_PARAMETER;
1164 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1167 /* Set version disabled mask now we know version */
1168 if (!SSL_USE_TLS1_2_CIPHERS(s))
1169 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1171 s->s3->tmp.mask_ssl = 0;
1173 * If it is a disabled cipher we didn't send it in client hello, so
1176 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1177 al = SSL_AD_ILLEGAL_PARAMETER;
1178 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1182 sk = ssl_get_ciphers_by_id(s);
1183 i = sk_SSL_CIPHER_find(sk, c);
1185 /* we did not say we would use this cipher */
1186 al = SSL_AD_ILLEGAL_PARAMETER;
1187 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1192 * Depending on the session caching (internal/external), the cipher
1193 * and/or cipher_id values may not be set. Make sure that cipher_id is
1194 * set and use it for comparison.
1196 if (s->session->cipher)
1197 s->session->cipher_id = s->session->cipher->id;
1198 if (s->hit && (s->session->cipher_id != c->id)) {
1199 al = SSL_AD_ILLEGAL_PARAMETER;
1200 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1201 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1204 s->s3->tmp.new_cipher = c;
1206 * Don't digest cached records if no sigalgs: we may need them for client
1209 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
1211 /* lets get the compression algorithm */
1213 if (!PACKET_get_1(&pkt, &compression)) {
1214 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1215 al = SSL_AD_DECODE_ERROR;
1218 #ifdef OPENSSL_NO_COMP
1219 if (compression != 0) {
1220 al = SSL_AD_ILLEGAL_PARAMETER;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1222 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1226 * If compression is disabled we'd better not try to resume a session
1227 * using compression.
1229 if (s->session->compress_meth != 0) {
1230 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1234 if (s->hit && compression != s->session->compress_meth) {
1235 al = SSL_AD_ILLEGAL_PARAMETER;
1236 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1237 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1240 if (compression == 0)
1242 else if (!ssl_allow_compression(s)) {
1243 al = SSL_AD_ILLEGAL_PARAMETER;
1244 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1247 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1250 if (compression != 0 && comp == NULL) {
1251 al = SSL_AD_ILLEGAL_PARAMETER;
1252 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1253 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1256 s->s3->tmp.new_compression = comp;
1260 /* TLS extensions */
1261 if (!ssl_parse_serverhello_tlsext(s, &pkt)) {
1262 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1266 if (PACKET_remaining(&pkt) != 0) {
1267 /* wrong packet length */
1268 al = SSL_AD_DECODE_ERROR;
1269 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1275 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1277 s->state = SSL_ST_ERR;
1281 int ssl3_get_server_certificate(SSL *s)
1283 int al, i, ok, ret = -1, exp_idx;
1284 unsigned long n, cert_list_len, cert_len;
1286 unsigned char *certstart, *certbytes;
1287 STACK_OF(X509) *sk = NULL;
1288 EVP_PKEY *pkey = NULL;
1291 n = s->method->ssl_get_message(s,
1294 -1, s->max_cert_list, &ok);
1299 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1300 s->s3->tmp.reuse_message = 1;
1304 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1305 al = SSL_AD_UNEXPECTED_MESSAGE;
1306 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
1310 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1311 al = SSL_AD_INTERNAL_ERROR;
1312 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1316 if ((sk = sk_X509_new_null()) == NULL) {
1317 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1321 if (!PACKET_get_net_3(&pkt, &cert_list_len)
1322 || PACKET_remaining(&pkt) != cert_list_len) {
1323 al = SSL_AD_DECODE_ERROR;
1324 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1327 while (PACKET_remaining(&pkt)) {
1328 if (!PACKET_get_net_3(&pkt, &cert_len)
1329 || !PACKET_get_bytes(&pkt, &certbytes, cert_len)) {
1330 al = SSL_AD_DECODE_ERROR;
1331 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1332 SSL_R_CERT_LENGTH_MISMATCH);
1336 certstart = certbytes;
1337 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1339 al = SSL_AD_BAD_CERTIFICATE;
1340 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1343 if (certbytes != (certstart + cert_len)) {
1344 al = SSL_AD_DECODE_ERROR;
1345 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1346 SSL_R_CERT_LENGTH_MISMATCH);
1349 if (!sk_X509_push(sk, x)) {
1350 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1356 i = ssl_verify_cert_chain(s, sk);
1357 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1358 al = ssl_verify_alarm_type(s->verify_result);
1359 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1360 SSL_R_CERTIFICATE_VERIFY_FAILED);
1363 ERR_clear_error(); /* but we keep s->verify_result */
1365 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1366 al = SSL_AD_HANDSHAKE_FAILURE;
1370 s->session->peer_chain = sk;
1372 * Inconsistency alert: cert_chain does include the peer's certificate,
1373 * which we don't include in s3_srvr.c
1375 x = sk_X509_value(sk, 0);
1378 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1381 pkey = X509_get_pubkey(x);
1383 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1386 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1387 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1391 i = ssl_cert_type(x, pkey);
1395 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1396 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1400 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1401 if (exp_idx >= 0 && i != exp_idx) {
1403 al = SSL_AD_ILLEGAL_PARAMETER;
1404 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1405 SSL_R_WRONG_CERTIFICATE_TYPE);
1408 s->session->peer_type = i;
1410 X509_free(s->session->peer);
1412 s->session->peer = x;
1413 s->session->verify_result = s->verify_result;
1420 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1422 s->state = SSL_ST_ERR;
1424 EVP_PKEY_free(pkey);
1426 sk_X509_pop_free(sk, X509_free);
1430 int ssl3_get_key_exchange(SSL *s)
1432 #ifndef OPENSSL_NO_RSA
1433 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1436 int al, j, verify_ret, ok;
1437 long n, alg_k, alg_a;
1438 EVP_PKEY *pkey = NULL;
1439 const EVP_MD *md = NULL;
1440 #ifndef OPENSSL_NO_RSA
1443 #ifndef OPENSSL_NO_DH
1446 #ifndef OPENSSL_NO_EC
1447 EC_KEY *ecdh = NULL;
1448 BN_CTX *bn_ctx = NULL;
1449 EC_POINT *srvr_ecpoint = NULL;
1452 PACKET pkt, save_param_start, signature;
1454 EVP_MD_CTX_init(&md_ctx);
1457 * use same message size as in ssl3_get_certificate_request() as
1458 * ServerKeyExchange message may be skipped
1460 n = s->method->ssl_get_message(s,
1461 SSL3_ST_CR_KEY_EXCH_A,
1462 SSL3_ST_CR_KEY_EXCH_B,
1463 -1, s->max_cert_list, &ok);
1467 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1469 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1471 * Can't skip server key exchange if this is an ephemeral
1474 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) {
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1476 al = SSL_AD_UNEXPECTED_MESSAGE;
1480 s->s3->tmp.reuse_message = 1;
1484 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1485 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1486 al = SSL_AD_INTERNAL_ERROR;
1489 save_param_start = pkt;
1491 #ifndef OPENSSL_NO_RSA
1492 RSA_free(s->s3->peer_rsa_tmp);
1493 s->s3->peer_rsa_tmp = NULL;
1495 #ifndef OPENSSL_NO_DH
1496 DH_free(s->s3->peer_dh_tmp);
1497 s->s3->peer_dh_tmp = NULL;
1499 #ifndef OPENSSL_NO_EC
1500 EC_KEY_free(s->s3->peer_ecdh_tmp);
1501 s->s3->peer_ecdh_tmp = NULL;
1504 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1506 al = SSL_AD_DECODE_ERROR;
1508 #ifndef OPENSSL_NO_PSK
1509 /* PSK ciphersuites are preceded by an identity hint */
1510 if (alg_k & SSL_PSK) {
1511 PACKET psk_identity_hint;
1512 if (!PACKET_get_length_prefixed_2(&pkt, &psk_identity_hint)) {
1513 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1518 * Store PSK identity hint for later use, hint is used in
1519 * ssl3_send_client_key_exchange. Assume that the maximum length of
1520 * a PSK identity hint can be as long as the maximum length of a PSK
1523 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1524 al = SSL_AD_HANDSHAKE_FAILURE;
1525 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1529 if (!PACKET_strndup(&psk_identity_hint,
1530 &s->session->psk_identity_hint)) {
1531 al = SSL_AD_INTERNAL_ERROR;
1536 /* Nothing else to do for plain PSK or RSAPSK */
1537 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1539 #endif /* !OPENSSL_NO_PSK */
1540 #ifndef OPENSSL_NO_SRP
1541 if (alg_k & SSL_kSRP) {
1542 PACKET prime, generator, salt, server_pub;
1543 if (!PACKET_get_length_prefixed_2(&pkt, &prime)
1544 || !PACKET_get_length_prefixed_2(&pkt, &generator)
1545 || !PACKET_get_length_prefixed_1(&pkt, &salt)
1546 || !PACKET_get_length_prefixed_2(&pkt, &server_pub)) {
1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1552 BN_bin2bn(PACKET_data(&prime),
1553 PACKET_remaining(&prime), NULL)) == NULL
1555 BN_bin2bn(PACKET_data(&generator),
1556 PACKET_remaining(&generator), NULL)) == NULL
1558 BN_bin2bn(PACKET_data(&salt),
1559 PACKET_remaining(&salt), NULL)) == NULL
1561 BN_bin2bn(PACKET_data(&server_pub),
1562 PACKET_remaining(&server_pub), NULL)) == NULL) {
1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1567 if (!srp_verify_server_param(s, &al)) {
1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1572 /* We must check if there is a certificate */
1573 if (alg_a & (SSL_aRSA|SSL_aDSS))
1574 pkey = X509_get_pubkey(s->session->peer);
1576 #endif /* !OPENSSL_NO_SRP */
1577 #ifndef OPENSSL_NO_RSA
1578 if (alg_k & SSL_kRSA) {
1580 /* Temporary RSA keys only allowed in export ciphersuites */
1581 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1582 al = SSL_AD_UNEXPECTED_MESSAGE;
1583 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1587 if (!PACKET_get_length_prefixed_2(&pkt, &mod)
1588 || !PACKET_get_length_prefixed_2(&pkt, &exp)) {
1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1593 if ((rsa = RSA_new()) == NULL) {
1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1598 if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod),
1600 || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp),
1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1606 /* this should be because we are using an export cipher */
1607 if (alg_a & SSL_aRSA)
1608 pkey = X509_get_pubkey(s->session->peer);
1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1614 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
1615 al = SSL_AD_UNEXPECTED_MESSAGE;
1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1620 s->s3->peer_rsa_tmp = rsa;
1623 #else /* OPENSSL_NO_RSA */
1626 #ifndef OPENSSL_NO_DH
1627 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1628 PACKET prime, generator, pub_key;
1630 if (!PACKET_get_length_prefixed_2(&pkt, &prime)
1631 || !PACKET_get_length_prefixed_2(&pkt, &generator)
1632 || !PACKET_get_length_prefixed_2(&pkt, &pub_key)) {
1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1637 if ((dh = DH_new()) == NULL) {
1638 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1642 if ((dh->p = BN_bin2bn(PACKET_data(&prime),
1643 PACKET_remaining(&prime), NULL)) == NULL
1644 || (dh->g = BN_bin2bn(PACKET_data(&generator),
1645 PACKET_remaining(&generator), NULL)) == NULL
1647 BN_bin2bn(PACKET_data(&pub_key),
1648 PACKET_remaining(&pub_key), NULL)) == NULL) {
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1653 if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
1654 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
1658 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1659 al = SSL_AD_HANDSHAKE_FAILURE;
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1663 if (alg_a & (SSL_aRSA|SSL_aDSS))
1664 pkey = X509_get_pubkey(s->session->peer);
1665 /* else anonymous DH, so no certificate or pkey. */
1667 s->s3->peer_dh_tmp = dh;
1670 #endif /* !OPENSSL_NO_DH */
1672 #ifndef OPENSSL_NO_EC
1673 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1675 const EC_GROUP *group;
1677 unsigned char *ecparams;
1679 if ((ecdh = EC_KEY_new()) == NULL) {
1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1685 * Extract elliptic curve parameters and the server's ephemeral ECDH
1686 * public key. For now we only support named (not generic) curves and
1687 * ECParameters in this case is just three bytes.
1689 if (!PACKET_get_bytes(&pkt, &ecparams, 3)) {
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1694 * Check curve is one of our preferences, if not server has sent an
1695 * invalid curve. ECParameters is 3 bytes.
1697 if (!tls1_check_curve(s, ecparams, 3)) {
1698 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1702 if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) {
1703 al = SSL_AD_INTERNAL_ERROR;
1704 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1705 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1709 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1710 if (ngroup == NULL) {
1711 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1714 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1715 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1718 EC_GROUP_free(ngroup);
1720 group = EC_KEY_get0_group(ecdh);
1722 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1723 (EC_GROUP_get_degree(group) > 163)) {
1724 al = SSL_AD_EXPORT_RESTRICTION;
1725 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1726 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1730 /* Next, get the encoded ECPoint */
1731 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1732 ((bn_ctx = BN_CTX_new()) == NULL)) {
1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1737 if (!PACKET_get_length_prefixed_1(&pkt, &encoded_pt)) {
1738 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1742 if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt),
1743 PACKET_remaining(&encoded_pt), bn_ctx) == 0) {
1744 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1749 * The ECC/TLS specification does not mention the use of DSA to sign
1750 * ECParameters in the server key exchange message. We do support RSA
1754 # ifndef OPENSSL_NO_RSA
1755 else if (alg_a & SSL_aRSA)
1756 pkey = X509_get_pubkey(s->session->peer);
1758 # ifndef OPENSSL_NO_EC
1759 else if (alg_a & SSL_aECDSA)
1760 pkey = X509_get_pubkey(s->session->peer);
1762 /* else anonymous ECDH, so no certificate or pkey. */
1763 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1764 s->s3->peer_ecdh_tmp = ecdh;
1766 BN_CTX_free(bn_ctx);
1768 EC_POINT_free(srvr_ecpoint);
1769 srvr_ecpoint = NULL;
1771 al = SSL_AD_UNEXPECTED_MESSAGE;
1772 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1775 #endif /* !OPENSSL_NO_EC */
1777 /* if it was signed, check the signature */
1781 * |pkt| now points to the beginning of the signature, so the difference
1782 * equals the length of the parameters.
1784 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1785 PACKET_remaining(&save_param_start) -
1786 PACKET_remaining(&pkt))) {
1787 al = SSL_AD_INTERNAL_ERROR;
1788 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1792 if (SSL_USE_SIGALGS(s)) {
1793 unsigned char *sigalgs;
1795 if (!PACKET_get_bytes(&pkt, &sigalgs, 2)) {
1796 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1799 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1806 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1812 if (!PACKET_get_length_prefixed_2(&pkt, &signature)
1813 || PACKET_remaining(&pkt) != 0) {
1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1817 j = EVP_PKEY_size(pkey);
1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1824 * Check signature length
1826 if (PACKET_remaining(&signature) > (size_t)j) {
1827 /* wrong packet length */
1828 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1831 #ifndef OPENSSL_NO_RSA
1832 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1838 for (num = 2; num > 0; num--) {
1839 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1840 EVP_DigestInit_ex(&md_ctx, (num == 2)
1841 ? s->ctx->md5 : s->ctx->sha1, NULL);
1842 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1844 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1846 EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms),
1847 PACKET_remaining(¶ms));
1848 EVP_DigestFinal_ex(&md_ctx, q, &size);
1853 RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature),
1854 PACKET_remaining(&signature), pkey->pkey.rsa);
1855 if (verify_ret < 0) {
1856 al = SSL_AD_DECRYPT_ERROR;
1857 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1860 if (verify_ret == 0) {
1862 al = SSL_AD_DECRYPT_ERROR;
1863 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1869 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1870 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1872 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1874 EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms),
1875 PACKET_remaining(¶ms));
1876 if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature),
1877 PACKET_remaining(&signature), pkey) <= 0) {
1879 al = SSL_AD_DECRYPT_ERROR;
1880 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1885 /* aNULL, aSRP or PSK do not need public keys */
1886 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1887 /* Might be wrong key type, check it */
1888 if (ssl3_check_cert_and_algorithm(s))
1889 /* Otherwise this shouldn't happen */
1890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1893 /* still data left over */
1894 if (PACKET_remaining(&pkt) != 0) {
1895 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1899 EVP_PKEY_free(pkey);
1900 EVP_MD_CTX_cleanup(&md_ctx);
1903 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1905 EVP_PKEY_free(pkey);
1906 #ifndef OPENSSL_NO_RSA
1909 #ifndef OPENSSL_NO_DH
1912 #ifndef OPENSSL_NO_EC
1913 BN_CTX_free(bn_ctx);
1914 EC_POINT_free(srvr_ecpoint);
1917 EVP_MD_CTX_cleanup(&md_ctx);
1918 s->state = SSL_ST_ERR;
1922 int ssl3_get_certificate_request(SSL *s)
1926 unsigned int list_len, ctype_num, i, name_len;
1927 X509_NAME *xn = NULL;
1928 unsigned char *data;
1929 unsigned char *namestart, *namebytes;
1930 STACK_OF(X509_NAME) *ca_sk = NULL;
1933 n = s->method->ssl_get_message(s,
1934 SSL3_ST_CR_CERT_REQ_A,
1935 SSL3_ST_CR_CERT_REQ_B,
1936 -1, s->max_cert_list, &ok);
1941 s->s3->tmp.cert_req = 0;
1943 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1944 s->s3->tmp.reuse_message = 1;
1946 * If we get here we don't need any cached handshake records as we
1947 * wont be doing client auth.
1949 if (!ssl3_digest_cached_records(s, 0))
1954 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1955 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1956 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
1960 /* TLS does not like anon-DH with client cert */
1961 if (s->version > SSL3_VERSION) {
1962 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
1963 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1964 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1965 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1970 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1971 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1972 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR);
1976 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1977 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1981 /* get the certificate types */
1982 if (!PACKET_get_1(&pkt, &ctype_num)
1983 || !PACKET_get_bytes(&pkt, &data, ctype_num)) {
1984 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1985 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1988 OPENSSL_free(s->cert->ctypes);
1989 s->cert->ctypes = NULL;
1990 if (ctype_num > SSL3_CT_NUMBER) {
1991 /* If we exceed static buffer copy all to cert structure */
1992 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1993 if (s->cert->ctypes == NULL) {
1994 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1997 memcpy(s->cert->ctypes, data, ctype_num);
1998 s->cert->ctype_num = (size_t)ctype_num;
1999 ctype_num = SSL3_CT_NUMBER;
2001 for (i = 0; i < ctype_num; i++)
2002 s->s3->tmp.ctype[i] = data[i];
2004 if (SSL_USE_SIGALGS(s)) {
2005 if (!PACKET_get_net_2(&pkt, &list_len)
2006 || !PACKET_get_bytes(&pkt, &data, list_len)) {
2007 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2008 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2012 /* Clear certificate digests and validity flags */
2013 for (i = 0; i < SSL_PKEY_NUM; i++) {
2014 s->s3->tmp.md[i] = NULL;
2015 s->s3->tmp.valid_flags[i] = 0;
2017 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
2018 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2020 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2023 if (!tls1_process_sigalgs(s)) {
2024 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2025 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2030 /* get the CA RDNs */
2031 if (!PACKET_get_net_2(&pkt, &list_len)
2032 || PACKET_remaining(&pkt) != list_len) {
2033 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2034 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2038 while (PACKET_remaining(&pkt)) {
2039 if (!PACKET_get_net_2(&pkt, &name_len)
2040 || !PACKET_get_bytes(&pkt, &namebytes, name_len)) {
2041 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2042 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2046 namestart = namebytes;
2048 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
2049 name_len)) == NULL) {
2050 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2051 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2055 if (namebytes != (namestart + name_len)) {
2056 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2057 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2058 SSL_R_CA_DN_LENGTH_MISMATCH);
2061 if (!sk_X509_NAME_push(ca_sk, xn)) {
2062 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2067 /* we should setup a certificate to return.... */
2068 s->s3->tmp.cert_req = 1;
2069 s->s3->tmp.ctype_num = ctype_num;
2070 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2071 s->s3->tmp.ca_names = ca_sk;
2077 s->state = SSL_ST_ERR;
2079 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2083 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
2085 return (X509_NAME_cmp(*a, *b));
2088 int ssl3_get_new_session_ticket(SSL *s)
2090 int ok, al, ret = 0;
2091 unsigned int ticklen;
2092 unsigned long ticket_lifetime_hint;
2096 n = s->method->ssl_get_message(s,
2097 SSL3_ST_CR_SESSION_TICKET_A,
2098 SSL3_ST_CR_SESSION_TICKET_B,
2099 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
2104 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
2105 al = SSL_AD_INTERNAL_ERROR;
2106 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
2110 if (!PACKET_get_net_4(&pkt, &ticket_lifetime_hint)
2111 || !PACKET_get_net_2(&pkt, &ticklen)
2112 || PACKET_remaining(&pkt) != ticklen) {
2113 al = SSL_AD_DECODE_ERROR;
2114 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2118 /* Server is allowed to change its mind and send an empty ticket. */
2122 if (s->session->session_id_length > 0) {
2123 int i = s->session_ctx->session_cache_mode;
2124 SSL_SESSION *new_sess;
2126 * We reused an existing session, so we need to replace it with a new
2129 if (i & SSL_SESS_CACHE_CLIENT) {
2131 * Remove the old session from the cache
2133 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
2134 if (s->session_ctx->remove_session_cb != NULL)
2135 s->session_ctx->remove_session_cb(s->session_ctx,
2138 /* We carry on if this fails */
2139 SSL_CTX_remove_session(s->session_ctx, s->session);
2143 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
2144 al = SSL_AD_INTERNAL_ERROR;
2145 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2149 SSL_SESSION_free(s->session);
2150 s->session = new_sess;
2153 OPENSSL_free(s->session->tlsext_tick);
2154 s->session->tlsext_ticklen = 0;
2156 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2157 if (!s->session->tlsext_tick) {
2158 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2161 if (!PACKET_copy_bytes(&pkt, s->session->tlsext_tick, ticklen)) {
2162 al = SSL_AD_DECODE_ERROR;
2163 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2167 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
2168 s->session->tlsext_ticklen = ticklen;
2170 * There are two ways to detect a resumed ticket session. One is to set
2171 * an appropriate session ID and then the server must return a match in
2172 * ServerHello. This allows the normal client session ID matching to work
2173 * and we know much earlier that the ticket has been accepted. The
2174 * other way is to set zero length session ID when the ticket is
2175 * presented and rely on the handshake to determine session resumption.
2176 * We choose the former approach because this fits in with assumptions
2177 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2178 * SHA256 is disabled) hash of the ticket.
2180 EVP_Digest(s->session->tlsext_tick, ticklen,
2181 s->session->session_id, &s->session->session_id_length,
2182 EVP_sha256(), NULL);
2186 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2188 s->state = SSL_ST_ERR;
2192 int ssl3_get_cert_status(SSL *s)
2195 unsigned long resplen, n;
2199 n = s->method->ssl_get_message(s,
2200 SSL3_ST_CR_CERT_STATUS_A,
2201 SSL3_ST_CR_CERT_STATUS_B,
2202 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
2207 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
2208 al = SSL_AD_INTERNAL_ERROR;
2209 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_INTERNAL_ERROR);
2212 if (!PACKET_get_1(&pkt, &type)
2213 || type != TLSEXT_STATUSTYPE_ocsp) {
2214 al = SSL_AD_DECODE_ERROR;
2215 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2218 if (!PACKET_get_net_3(&pkt, &resplen)
2219 || PACKET_remaining(&pkt) != resplen) {
2220 al = SSL_AD_DECODE_ERROR;
2221 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2224 OPENSSL_free(s->tlsext_ocsp_resp);
2225 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
2226 if (!s->tlsext_ocsp_resp) {
2227 al = SSL_AD_INTERNAL_ERROR;
2228 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2231 if (!PACKET_copy_bytes(&pkt, s->tlsext_ocsp_resp, resplen)) {
2232 al = SSL_AD_DECODE_ERROR;
2233 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2236 s->tlsext_ocsp_resplen = resplen;
2237 if (s->ctx->tlsext_status_cb) {
2239 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2241 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2242 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2246 al = SSL_AD_INTERNAL_ERROR;
2247 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2253 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2254 s->state = SSL_ST_ERR;
2258 int ssl3_get_server_done(SSL *s)
2263 /* Second to last param should be very small, like 0 :-) */
2264 n = s->method->ssl_get_message(s,
2265 SSL3_ST_CR_SRVR_DONE_A,
2266 SSL3_ST_CR_SRVR_DONE_B,
2267 SSL3_MT_SERVER_DONE, 30, &ok);
2272 /* should contain no data */
2273 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2274 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2275 s->state = SSL_ST_ERR;
2282 int ssl3_send_client_key_exchange(SSL *s)
2286 #ifndef OPENSSL_NO_PSK
2287 size_t pskhdrlen = 0;
2289 unsigned long alg_k;
2290 #ifndef OPENSSL_NO_RSA
2292 EVP_PKEY *pkey = NULL;
2294 #ifndef OPENSSL_NO_EC
2295 EC_KEY *clnt_ecdh = NULL;
2296 const EC_POINT *srvr_ecpoint = NULL;
2297 EVP_PKEY *srvr_pub_pkey = NULL;
2298 unsigned char *encodedPoint = NULL;
2299 int encoded_pt_len = 0;
2300 BN_CTX *bn_ctx = NULL;
2302 unsigned char *pms = NULL;
2304 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2306 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
2307 p = ssl_handshake_start(s);
2310 #ifndef OPENSSL_NO_PSK
2311 if (alg_k & SSL_PSK) {
2314 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2315 * \0-terminated identity. The last byte is for us for simulating
2318 char identity[PSK_MAX_IDENTITY_LEN + 1];
2320 unsigned char psk[PSK_MAX_PSK_LEN];
2323 if (s->psk_client_callback == NULL) {
2324 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2325 SSL_R_PSK_NO_CLIENT_CB);
2329 memset(identity, 0, sizeof(identity));
2331 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2332 identity, sizeof(identity) - 1,
2335 if (psklen > PSK_MAX_PSK_LEN) {
2336 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2337 ERR_R_INTERNAL_ERROR);
2339 } else if (psklen == 0) {
2340 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2341 SSL_R_PSK_IDENTITY_NOT_FOUND);
2345 OPENSSL_free(s->s3->tmp.psk);
2346 s->s3->tmp.psk = BUF_memdup(psk, psklen);
2347 OPENSSL_cleanse(psk, psklen);
2349 if (s->s3->tmp.psk == NULL) {
2350 OPENSSL_cleanse(identity, sizeof(identity));
2354 s->s3->tmp.psklen = psklen;
2356 identitylen = strlen(identity);
2357 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2358 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2359 ERR_R_INTERNAL_ERROR);
2362 OPENSSL_free(s->session->psk_identity);
2363 s->session->psk_identity = BUF_strdup(identity);
2364 if (s->session->psk_identity == NULL) {
2365 OPENSSL_cleanse(identity, sizeof(identity));
2369 s2n(identitylen, p);
2370 memcpy(p, identity, identitylen);
2371 pskhdrlen = 2 + identitylen;
2375 OPENSSL_cleanse(identity, sizeof(identity));
2377 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2381 if (alg_k & SSL_kPSK) {
2386 /* Fool emacs indentation */
2389 #ifndef OPENSSL_NO_RSA
2390 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2392 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2393 pms = OPENSSL_malloc(pmslen);
2397 if (s->session->peer == NULL) {
2399 * We should always have a server certificate with SSL_kRSA.
2401 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2402 ERR_R_INTERNAL_ERROR);
2406 if (s->s3->peer_rsa_tmp != NULL)
2407 rsa = s->s3->peer_rsa_tmp;
2409 pkey = X509_get_pubkey(s->session->peer);
2410 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2411 || (pkey->pkey.rsa == NULL)) {
2412 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2413 ERR_R_INTERNAL_ERROR);
2414 EVP_PKEY_free(pkey);
2417 rsa = pkey->pkey.rsa;
2418 EVP_PKEY_free(pkey);
2421 pms[0] = s->client_version >> 8;
2422 pms[1] = s->client_version & 0xff;
2423 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2427 /* Fix buf for TLS and beyond */
2428 if (s->version > SSL3_VERSION)
2430 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2432 if (s->options & SSL_OP_PKCS1_CHECK_1)
2434 if (s->options & SSL_OP_PKCS1_CHECK_2)
2438 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2439 SSL_R_BAD_RSA_ENCRYPT);
2443 /* Fix buf for TLS and beyond */
2444 if (s->version > SSL3_VERSION) {
2450 #ifndef OPENSSL_NO_DH
2451 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
2452 DH *dh_srvr, *dh_clnt;
2453 if (s->s3->peer_dh_tmp != NULL)
2454 dh_srvr = s->s3->peer_dh_tmp;
2456 /* we get them from the cert */
2457 EVP_PKEY *spkey = NULL;
2459 spkey = X509_get_pubkey(s->session->peer);
2461 dh_srvr = EVP_PKEY_get1_DH(spkey);
2462 EVP_PKEY_free(spkey);
2464 if (dh_srvr == NULL) {
2465 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2466 ERR_R_INTERNAL_ERROR);
2470 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2471 /* Use client certificate key */
2472 EVP_PKEY *clkey = s->cert->key->privatekey;
2475 dh_clnt = EVP_PKEY_get1_DH(clkey);
2476 if (dh_clnt == NULL) {
2477 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2478 ERR_R_INTERNAL_ERROR);
2482 /* generate a new random key */
2483 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2484 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2487 if (!DH_generate_key(dh_clnt)) {
2488 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2494 pmslen = DH_size(dh_clnt);
2495 pms = OPENSSL_malloc(pmslen);
2500 * use the 'p' output buffer for the DH key, but make sure to
2501 * clear it out afterwards
2504 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
2505 if (s->s3->peer_dh_tmp == NULL)
2509 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2515 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2518 /* send off the data */
2519 n = BN_num_bytes(dh_clnt->pub_key);
2521 BN_bn2bin(dh_clnt->pub_key, p);
2529 #ifndef OPENSSL_NO_EC
2530 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
2531 const EC_GROUP *srvr_group = NULL;
2533 int ecdh_clnt_cert = 0;
2536 * Did we send out the client's ECDH share for use in premaster
2537 * computation as part of client certificate? If so, set
2538 * ecdh_clnt_cert to 1.
2540 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
2542 * XXX: For now, we do not support client
2543 * authentication using ECDH certificates.
2544 * To add such support, one needs to add
2545 * code that checks for appropriate
2546 * conditions and sets ecdh_clnt_cert to 1.
2547 * For example, the cert have an ECC
2548 * key on the same curve as the server's
2549 * and the key should be authorized for
2552 * One also needs to add code in ssl3_connect
2553 * to skip sending the certificate verify
2556 * if ((s->cert->key->privatekey != NULL) &&
2557 * (s->cert->key->privatekey->type ==
2558 * EVP_PKEY_EC) && ...)
2559 * ecdh_clnt_cert = 1;
2563 if (s->s3->peer_ecdh_tmp != NULL) {
2564 tkey = s->s3->peer_ecdh_tmp;
2566 /* Get the Server Public Key from Cert */
2567 srvr_pub_pkey = X509_get_pubkey(s->session->peer);
2568 if ((srvr_pub_pkey == NULL)
2569 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2570 || (srvr_pub_pkey->pkey.ec == NULL)) {
2571 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2572 ERR_R_INTERNAL_ERROR);
2576 tkey = srvr_pub_pkey->pkey.ec;
2579 srvr_group = EC_KEY_get0_group(tkey);
2580 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2582 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2584 ERR_R_INTERNAL_ERROR);
2588 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2589 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2590 ERR_R_MALLOC_FAILURE);
2594 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2595 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2598 if (ecdh_clnt_cert) {
2600 * Reuse key info from our certificate We only need our
2601 * private key to perform the ECDH computation.
2603 const BIGNUM *priv_key;
2604 tkey = s->cert->key->privatekey->pkey.ec;
2605 priv_key = EC_KEY_get0_private_key(tkey);
2606 if (priv_key == NULL) {
2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2608 ERR_R_MALLOC_FAILURE);
2611 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2616 /* Generate a new ECDH key pair */
2617 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2618 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2625 * use the 'p' output buffer for the ECDH key, but make sure to
2626 * clear it out afterwards
2629 field_size = EC_GROUP_get_degree(srvr_group);
2630 if (field_size <= 0) {
2631 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2634 pmslen = (field_size + 7) / 8;
2635 pms = OPENSSL_malloc(pmslen);
2638 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2639 if (n <= 0 || pmslen != (size_t)n) {
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2644 if (ecdh_clnt_cert) {
2645 /* Send empty client key exch message */
2649 * First check the size of encoding and allocate memory
2653 EC_POINT_point2oct(srvr_group,
2654 EC_KEY_get0_public_key(clnt_ecdh),
2655 POINT_CONVERSION_UNCOMPRESSED,
2658 encodedPoint = (unsigned char *)
2659 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2660 bn_ctx = BN_CTX_new();
2661 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2662 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2663 ERR_R_MALLOC_FAILURE);
2667 /* Encode the public key */
2668 n = EC_POINT_point2oct(srvr_group,
2669 EC_KEY_get0_public_key(clnt_ecdh),
2670 POINT_CONVERSION_UNCOMPRESSED,
2671 encodedPoint, encoded_pt_len, bn_ctx);
2673 *p = n; /* length of encoded point */
2674 /* Encoded point will be copied here */
2676 /* copy the point */
2677 memcpy(p, encodedPoint, n);
2678 /* increment n to account for length field */
2682 /* Free allocated memory */
2683 BN_CTX_free(bn_ctx);
2684 OPENSSL_free(encodedPoint);
2685 EC_KEY_free(clnt_ecdh);
2686 EVP_PKEY_free(srvr_pub_pkey);
2688 #endif /* !OPENSSL_NO_EC */
2689 else if (alg_k & SSL_kGOST) {
2690 /* GOST key exchange message creation */
2691 EVP_PKEY_CTX *pkey_ctx;
2694 unsigned int md_len;
2695 unsigned char shared_ukm[32], tmp[256];
2696 EVP_MD_CTX *ukm_hash;
2700 pms = OPENSSL_malloc(pmslen);
2705 * Get server sertificate PKEY and create ctx from it
2707 peer_cert = s->session->peer;
2709 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2710 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2714 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2715 X509_get_pubkey(peer_cert), NULL);
2717 * If we have send a certificate, and certificate key
2719 * * parameters match those of server certificate, use
2720 * certificate key for key exchange
2723 /* Otherwise, generate ephemeral key pair */
2725 EVP_PKEY_encrypt_init(pkey_ctx);
2726 /* Generate session key */
2727 if (RAND_bytes(pms, pmslen) <= 0) {
2728 EVP_PKEY_CTX_free(pkey_ctx);
2729 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2730 ERR_R_INTERNAL_ERROR);
2734 * If we have client certificate, use its secret as peer key
2736 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2737 if (EVP_PKEY_derive_set_peer
2738 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2740 * If there was an error - just ignore it. Ephemeral key
2747 * Compute shared IV and store it in algorithm-specific context
2750 ukm_hash = EVP_MD_CTX_create();
2751 EVP_DigestInit(ukm_hash,
2752 EVP_get_digestbynid(NID_id_GostR3411_94));
2753 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2755 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2757 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2758 EVP_MD_CTX_destroy(ukm_hash);
2759 if (EVP_PKEY_CTX_ctrl
2760 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2762 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2766 /* Make GOST keytransport blob message */
2768 * Encapsulate it into sequence
2770 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2772 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
2773 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2777 if (msglen >= 0x80) {
2779 *(p++) = msglen & 0xff;
2782 *(p++) = msglen & 0xff;
2785 memcpy(p, tmp, msglen);
2786 /* Check if pubkey from client certificate was used */
2787 if (EVP_PKEY_CTX_ctrl
2788 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2789 /* Set flag "skip certificate verify" */
2790 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2792 EVP_PKEY_CTX_free(pkey_ctx);
2793 EVP_PKEY_free(pub_key);
2796 #ifndef OPENSSL_NO_SRP
2797 else if (alg_k & SSL_kSRP) {
2798 if (s->srp_ctx.A != NULL) {
2799 /* send off the data */
2800 n = BN_num_bytes(s->srp_ctx.A);
2802 BN_bn2bin(s->srp_ctx.A, p);
2805 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2806 ERR_R_INTERNAL_ERROR);
2809 OPENSSL_free(s->session->srp_username);
2810 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2811 if (s->session->srp_username == NULL) {
2812 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2813 ERR_R_MALLOC_FAILURE);
2819 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2820 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2824 #ifndef OPENSSL_NO_PSK
2828 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2829 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2830 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2834 s->state = SSL3_ST_CW_KEY_EXCH_B;
2837 /* SSL3_ST_CW_KEY_EXCH_B */
2838 n = ssl_do_write(s);
2839 #ifndef OPENSSL_NO_SRP
2841 if (alg_k & SSL_kSRP) {
2843 * If everything written generate master key: no need to save PMS as
2844 * srp_generate_client_master_secret generates it internally.
2847 if (!srp_generate_client_master_secret(s)) {
2848 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2849 ERR_R_INTERNAL_ERROR);
2855 /* If we haven't written everything save PMS */
2857 s->s3->tmp.pms = pms;
2858 s->s3->tmp.pmslen = pmslen;
2860 /* If we don't have a PMS restore */
2862 pms = s->s3->tmp.pms;
2863 pmslen = s->s3->tmp.pmslen;
2865 if (pms == NULL && !(alg_k & SSL_kPSK)) {
2866 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2867 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2870 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2871 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2878 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2879 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2881 OPENSSL_clear_free(pms, pmslen);
2882 s->s3->tmp.pms = NULL;
2883 #ifndef OPENSSL_NO_EC
2884 BN_CTX_free(bn_ctx);
2885 OPENSSL_free(encodedPoint);
2886 EC_KEY_free(clnt_ecdh);
2887 EVP_PKEY_free(srvr_pub_pkey);
2889 #ifndef OPENSSL_NO_PSK
2890 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2891 s->s3->tmp.psk = NULL;
2893 s->state = SSL_ST_ERR;
2897 int ssl3_send_client_verify(SSL *s)
2900 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2902 EVP_PKEY_CTX *pctx = NULL;
2908 EVP_MD_CTX_init(&mctx);
2910 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2911 p = ssl_handshake_start(s);
2912 pkey = s->cert->key->privatekey;
2913 /* Create context from key and test if sha1 is allowed as digest */
2914 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2915 EVP_PKEY_sign_init(pctx);
2916 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2917 if (!SSL_USE_SIGALGS(s))
2918 s->method->ssl3_enc->cert_verify_mac(s,
2921 [MD5_DIGEST_LENGTH]));
2926 * For TLS v1.2 send signature algorithm and signature using agreed
2927 * digest and cached handshake records.
2929 if (SSL_USE_SIGALGS(s)) {
2932 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2933 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2934 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
2935 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2940 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2943 if (!EVP_SignInit_ex(&mctx, md, NULL)
2944 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2945 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
2946 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB);
2951 /* Digest cached records and discard handshake buffer */
2952 if (!ssl3_digest_cached_records(s, 0))
2955 #ifndef OPENSSL_NO_RSA
2956 if (pkey->type == EVP_PKEY_RSA) {
2957 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
2958 if (RSA_sign(NID_md5_sha1, data,
2959 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
2960 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
2961 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
2968 #ifndef OPENSSL_NO_DSA
2969 if (pkey->type == EVP_PKEY_DSA) {
2970 if (!DSA_sign(pkey->save_type,
2971 &(data[MD5_DIGEST_LENGTH]),
2972 SHA_DIGEST_LENGTH, &(p[2]),
2973 (unsigned int *)&j, pkey->pkey.dsa)) {
2974 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
2981 #ifndef OPENSSL_NO_EC
2982 if (pkey->type == EVP_PKEY_EC) {
2983 if (!ECDSA_sign(pkey->save_type,
2984 &(data[MD5_DIGEST_LENGTH]),
2985 SHA_DIGEST_LENGTH, &(p[2]),
2986 (unsigned int *)&j, pkey->pkey.ec)) {
2987 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
2994 if (pkey->type == NID_id_GostR3410_2001) {
2995 unsigned char signbuf[64];
2997 size_t sigsize = 64;
2998 s->method->ssl3_enc->cert_verify_mac(s,
2999 NID_id_GostR3411_94, data);
3000 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3001 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3004 for (i = 63, j = 0; i >= 0; j++, i--) {
3005 p[2 + j] = signbuf[i];
3010 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3013 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
3014 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3017 s->state = SSL3_ST_CW_CERT_VRFY_B;
3019 EVP_MD_CTX_cleanup(&mctx);
3020 EVP_PKEY_CTX_free(pctx);
3021 return ssl_do_write(s);
3023 EVP_MD_CTX_cleanup(&mctx);
3024 EVP_PKEY_CTX_free(pctx);
3025 s->state = SSL_ST_ERR;
3030 * Check a certificate can be used for client authentication. Currently check
3031 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
3032 * certificates can be used and optionally checks suitability for Suite B.
3034 static int ssl3_check_client_certificate(SSL *s)
3036 unsigned long alg_k;
3037 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3039 /* If no suitable signature algorithm can't use certificate */
3040 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
3043 * If strict mode check suitability of chain before using it. This also
3044 * adjusts suite B digest if necessary.
3046 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3047 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3049 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3050 /* See if we can use client certificate for fixed DH */
3051 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3052 int i = s->session->peer_type;
3053 EVP_PKEY *clkey = NULL, *spkey = NULL;
3054 clkey = s->cert->key->privatekey;
3055 /* If client key not DH assume it can be used */
3056 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3059 spkey = X509_get_pubkey(s->session->peer);
3061 /* Compare server and client parameters */
3062 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3063 EVP_PKEY_free(spkey);
3067 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3072 int ssl3_send_client_certificate(SSL *s)
3075 EVP_PKEY *pkey = NULL;
3078 if (s->state == SSL3_ST_CW_CERT_A) {
3079 /* Let cert callback update client certificates if required */
3080 if (s->cert->cert_cb) {
3081 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3083 s->rwstate = SSL_X509_LOOKUP;
3087 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3088 s->state = SSL_ST_ERR;
3091 s->rwstate = SSL_NOTHING;
3093 if (ssl3_check_client_certificate(s))
3094 s->state = SSL3_ST_CW_CERT_C;
3096 s->state = SSL3_ST_CW_CERT_B;
3099 /* We need to get a client cert */
3100 if (s->state == SSL3_ST_CW_CERT_B) {
3102 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3103 * return(-1); We then get retied later
3106 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3108 s->rwstate = SSL_X509_LOOKUP;
3111 s->rwstate = SSL_NOTHING;
3112 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3113 s->state = SSL3_ST_CW_CERT_B;
3114 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3116 } else if (i == 1) {
3118 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
3119 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3123 EVP_PKEY_free(pkey);
3124 if (i && !ssl3_check_client_certificate(s))
3127 if (s->version == SSL3_VERSION) {
3128 s->s3->tmp.cert_req = 0;
3129 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3132 s->s3->tmp.cert_req = 2;
3133 if (!ssl3_digest_cached_records(s, 0)) {
3134 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3135 s->state = SSL_ST_ERR;
3141 /* Ok, we have a cert */
3142 s->state = SSL3_ST_CW_CERT_C;
3145 if (s->state == SSL3_ST_CW_CERT_C) {
3146 s->state = SSL3_ST_CW_CERT_D;
3147 if (!ssl3_output_cert_chain(s,
3148 (s->s3->tmp.cert_req ==
3149 2) ? NULL : s->cert->key)) {
3150 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3151 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3152 s->state = SSL_ST_ERR;
3156 /* SSL3_ST_CW_CERT_D */
3157 return ssl_do_write(s);
3160 #define has_bits(i,m) (((i)&(m)) == (m))
3162 int ssl3_check_cert_and_algorithm(SSL *s)
3166 EVP_PKEY *pkey = NULL;
3168 #ifndef OPENSSL_NO_RSA
3171 #ifndef OPENSSL_NO_DH
3174 int al = SSL_AD_HANDSHAKE_FAILURE;
3176 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3177 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
3179 /* we don't have a certificate */
3180 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
3182 #ifndef OPENSSL_NO_RSA
3183 rsa = s->s3->peer_rsa_tmp;
3185 #ifndef OPENSSL_NO_DH
3186 dh = s->s3->peer_dh_tmp;
3189 /* This is the passed certificate */
3191 idx = s->session->peer_type;
3192 #ifndef OPENSSL_NO_EC
3193 if (idx == SSL_PKEY_ECC) {
3194 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
3196 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3201 } else if (alg_a & SSL_aECDSA) {
3202 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3203 SSL_R_MISSING_ECDSA_SIGNING_CERT);
3205 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
3206 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
3210 pkey = X509_get_pubkey(s->session->peer);
3211 pkey_bits = EVP_PKEY_bits(pkey);
3212 i = X509_certificate_type(s->session->peer, pkey);
3213 EVP_PKEY_free(pkey);
3215 /* Check that we have a certificate if we require one */
3216 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3217 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3218 SSL_R_MISSING_RSA_SIGNING_CERT);
3221 #ifndef OPENSSL_NO_DSA
3222 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3223 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3224 SSL_R_MISSING_DSA_SIGNING_CERT);
3228 #ifndef OPENSSL_NO_RSA
3229 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
3230 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3231 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3232 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3233 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3235 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
3236 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3237 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3238 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3239 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3243 /* server key exchange is not allowed. */
3244 al = SSL_AD_INTERNAL_ERROR;
3245 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3252 #ifndef OPENSSL_NO_DH
3253 if ((alg_k & SSL_kDHE) && (dh == NULL)) {
3254 al = SSL_AD_INTERNAL_ERROR;
3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3257 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3258 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3260 SSL_R_MISSING_DH_RSA_CERT);
3263 # ifndef OPENSSL_NO_DSA
3264 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3265 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3266 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3267 SSL_R_MISSING_DH_DSA_CERT);
3273 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3274 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3275 #ifndef OPENSSL_NO_RSA
3276 if (alg_k & SSL_kRSA) {
3278 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3279 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3281 } else if (RSA_bits(rsa) >
3282 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3283 /* We have a temporary RSA key but it's too large. */
3284 al = SSL_AD_EXPORT_RESTRICTION;
3285 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3286 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3291 #ifndef OPENSSL_NO_DH
3292 if (alg_k & SSL_kDHE) {
3294 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3295 /* We have a temporary DH key but it's too large. */
3296 al = SSL_AD_EXPORT_RESTRICTION;
3297 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3298 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3301 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3302 /* The cert should have had an export DH key. */
3303 al = SSL_AD_EXPORT_RESTRICTION;
3304 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3305 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3310 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3311 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3317 ssl3_send_alert(s, SSL3_AL_FATAL, al);
3322 * Normally, we can tell if the server is resuming the session from
3323 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server
3324 * message after the ServerHello to determine if the server is resuming.
3325 * Therefore, we allow EAP-FAST to peek ahead.
3326 * ssl3_check_change returns 1 if we are resuming from an external
3327 * pre-shared secret, we have a "ticket" and the next server message
3328 * is CCS; and 0 otherwise. It returns -1 upon an error.
3330 static int ssl3_check_change(SSL *s)
3334 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb ||
3335 !s->session->tlsext_tick)
3339 * This function is called when we might get a Certificate message instead,
3340 * so permit appropriate message length.
3341 * We ignore the return value as we're only interested in the message type
3342 * and not its length.
3344 s->method->ssl_get_message(s,
3347 -1, s->max_cert_list, &ok);
3352 s->s3->tmp.reuse_message = 1;
3354 if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC)
3360 #ifndef OPENSSL_NO_NEXTPROTONEG
3361 int ssl3_send_next_proto(SSL *s)
3363 unsigned int len, padding_len;
3366 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3367 len = s->next_proto_negotiated_len;
3368 padding_len = 32 - ((len + 2) % 32);
3369 d = (unsigned char *)s->init_buf->data;
3371 memcpy(d + 5, s->next_proto_negotiated, len);
3372 d[5 + len] = padding_len;
3373 memset(d + 6 + len, 0, padding_len);
3374 *(d++) = SSL3_MT_NEXT_PROTO;
3375 l2n3(2 + len + padding_len, d);
3376 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3377 s->init_num = 4 + 2 + len + padding_len;
3381 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3385 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3388 #ifndef OPENSSL_NO_ENGINE
3389 if (s->ctx->client_cert_engine) {
3390 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3391 SSL_get_client_CA_list(s),
3392 px509, ppkey, NULL, NULL, NULL);
3397 if (s->ctx->client_cert_cb)
3398 i = s->ctx->client_cert_cb(s, px509, ppkey);
3402 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3408 int empty_reneg_info_scsv = !s->renegotiate;
3409 /* Set disabled masks for this session */
3410 ssl_set_client_disabled(s);
3416 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3417 c = sk_SSL_CIPHER_value(sk, i);
3418 /* Skip disabled ciphers */
3419 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3421 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3422 if (c->id == SSL3_CK_SCSV) {
3423 if (!empty_reneg_info_scsv)
3426 empty_reneg_info_scsv = 0;
3429 j = s->method->put_cipher_by_char(c, p);
3433 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3437 if (empty_reneg_info_scsv) {
3438 static SSL_CIPHER scsv = {
3439 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3441 j = s->method->put_cipher_by_char(&scsv, p);
3443 #ifdef OPENSSL_RI_DEBUG
3445 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3448 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3449 static SSL_CIPHER scsv = {
3450 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3452 j = s->method->put_cipher_by_char(&scsv, p);