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_finished(SSL *s);
169 static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
171 int (*put_cb) (const SSL_CIPHER *,
175 int ssl3_connect(SSL *s)
178 unsigned long Time = (unsigned long)time(NULL);
179 void (*cb) (const SSL *ssl, int type, int val) = NULL;
181 int new_state, state, skip = 0;
183 RAND_add(&Time, sizeof(Time), 0);
187 if (s->info_callback != NULL)
188 cb = s->info_callback;
189 else if (s->ctx->info_callback != NULL)
190 cb = s->ctx->info_callback;
193 if (!SSL_in_init(s) || SSL_in_before(s)) {
198 #ifndef OPENSSL_NO_HEARTBEATS
200 * If we're awaiting a HeartbeatResponse, pretend we already got and
201 * don't await it anymore, because Heartbeats don't make sense during
204 if (s->tlsext_hb_pending) {
205 s->tlsext_hb_pending = 0;
214 case SSL_ST_RENEGOTIATE:
216 s->state = SSL_ST_CONNECT;
217 s->ctx->stats.sess_connect_renegotiate++;
221 case SSL_ST_BEFORE | SSL_ST_CONNECT:
222 case SSL_ST_OK | SSL_ST_CONNECT:
226 cb(s, SSL_CB_HANDSHAKE_START, 1);
228 if ((s->version >> 8) != SSL3_VERSION_MAJOR
229 && s->version != TLS_ANY_VERSION) {
230 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
231 s->state = SSL_ST_ERR;
236 if (s->version != TLS_ANY_VERSION &&
237 !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
238 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
242 /* s->version=SSL3_VERSION; */
243 s->type = SSL_ST_CONNECT;
245 if (s->init_buf == NULL) {
246 if ((buf = BUF_MEM_new()) == NULL) {
248 s->state = SSL_ST_ERR;
251 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
253 s->state = SSL_ST_ERR;
260 if (!ssl3_setup_buffers(s)) {
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s, 0)) {
268 s->state = SSL_ST_ERR;
272 /* don't push the buffering BIO quite yet */
274 ssl3_init_finished_mac(s);
276 s->state = SSL3_ST_CW_CLNT_HELLO_A;
277 s->ctx->stats.sess_connect++;
279 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
281 * Should have been reset by ssl3_get_finished, too.
283 s->s3->change_cipher_spec = 0;
286 case SSL3_ST_CW_CLNT_HELLO_A:
287 case SSL3_ST_CW_CLNT_HELLO_B:
290 ret = ssl3_client_hello(s);
293 s->state = SSL3_ST_CR_SRVR_HELLO_A;
296 /* turn on buffering for the next lot of output */
297 if (s->bbio != s->wbio)
298 s->wbio = BIO_push(s->bbio, s->wbio);
302 case SSL3_ST_CR_SRVR_HELLO_A:
303 case SSL3_ST_CR_SRVR_HELLO_B:
304 ret = ssl3_get_server_hello(s);
309 s->state = SSL3_ST_CR_FINISHED_A;
310 if (s->tlsext_ticket_expected) {
311 /* receive renewed session ticket */
312 s->state = SSL3_ST_CR_SESSION_TICKET_A;
315 s->state = SSL3_ST_CR_CERT_A;
319 case SSL3_ST_CR_CERT_A:
320 case SSL3_ST_CR_CERT_B:
321 /* Noop (ret = 0) for everything but EAP-FAST. */
322 ret = ssl3_check_finished(s);
327 s->state = SSL3_ST_CR_FINISHED_A;
332 /* Check if it is anon DH/ECDH, SRP auth */
336 new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
337 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
338 ret = ssl3_get_server_certificate(s);
342 if (s->tlsext_status_expected)
343 s->state = SSL3_ST_CR_CERT_STATUS_A;
345 s->state = SSL3_ST_CR_KEY_EXCH_A;
348 s->state = SSL3_ST_CR_KEY_EXCH_A;
354 case SSL3_ST_CR_KEY_EXCH_A:
355 case SSL3_ST_CR_KEY_EXCH_B:
356 ret = ssl3_get_key_exchange(s);
359 s->state = SSL3_ST_CR_CERT_REQ_A;
363 * at this point we check that we have the required stuff from
366 if (!ssl3_check_cert_and_algorithm(s)) {
368 s->state = SSL_ST_ERR;
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret = ssl3_get_certificate_request(s);
378 s->state = SSL3_ST_CR_SRVR_DONE_A;
382 case SSL3_ST_CR_SRVR_DONE_A:
383 case SSL3_ST_CR_SRVR_DONE_B:
384 ret = ssl3_get_server_done(s);
387 #ifndef OPENSSL_NO_SRP
388 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
389 if ((ret = SRP_Calc_A_param(s)) <= 0) {
390 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC);
391 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
392 s->state = SSL_ST_ERR;
397 if (s->s3->tmp.cert_req)
398 s->state = SSL3_ST_CW_CERT_A;
400 s->state = SSL3_ST_CW_KEY_EXCH_A;
405 case SSL3_ST_CW_CERT_A:
406 case SSL3_ST_CW_CERT_B:
407 case SSL3_ST_CW_CERT_C:
408 case SSL3_ST_CW_CERT_D:
409 ret = ssl3_send_client_certificate(s);
412 s->state = SSL3_ST_CW_KEY_EXCH_A;
416 case SSL3_ST_CW_KEY_EXCH_A:
417 case SSL3_ST_CW_KEY_EXCH_B:
418 ret = ssl3_send_client_key_exchange(s);
422 * EAY EAY EAY need to check for DH fix cert sent back
425 * For TLS, cert_req is set to 2, so a cert chain of nothing is
426 * sent, but no verify packet is sent
429 * XXX: For now, we do not support client authentication in ECDH
430 * cipher suites with ECDH (rather than ECDSA) certificates. We
431 * need to skip the certificate verify message when client's
432 * ECDH public key is sent inside the client certificate.
434 if (s->s3->tmp.cert_req == 1) {
435 s->state = SSL3_ST_CW_CERT_VRFY_A;
437 s->state = SSL3_ST_CW_CHANGE_A;
439 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
440 s->state = SSL3_ST_CW_CHANGE_A;
446 case SSL3_ST_CW_CERT_VRFY_A:
447 case SSL3_ST_CW_CERT_VRFY_B:
448 ret = ssl3_send_client_verify(s);
451 s->state = SSL3_ST_CW_CHANGE_A;
455 case SSL3_ST_CW_CHANGE_A:
456 case SSL3_ST_CW_CHANGE_B:
457 ret = ssl3_send_change_cipher_spec(s,
459 SSL3_ST_CW_CHANGE_B);
463 #if defined(OPENSSL_NO_NEXTPROTONEG)
464 s->state = SSL3_ST_CW_FINISHED_A;
466 if (s->s3->next_proto_neg_seen)
467 s->state = SSL3_ST_CW_NEXT_PROTO_A;
469 s->state = SSL3_ST_CW_FINISHED_A;
473 s->session->cipher = s->s3->tmp.new_cipher;
474 #ifdef OPENSSL_NO_COMP
475 s->session->compress_meth = 0;
477 if (s->s3->tmp.new_compression == NULL)
478 s->session->compress_meth = 0;
480 s->session->compress_meth = s->s3->tmp.new_compression->id;
482 if (!s->method->ssl3_enc->setup_key_block(s)) {
484 s->state = SSL_ST_ERR;
488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
492 s->state = SSL_ST_ERR;
498 #if !defined(OPENSSL_NO_NEXTPROTONEG)
499 case SSL3_ST_CW_NEXT_PROTO_A:
500 case SSL3_ST_CW_NEXT_PROTO_B:
501 ret = ssl3_send_next_proto(s);
504 s->state = SSL3_ST_CW_FINISHED_A;
508 case SSL3_ST_CW_FINISHED_A:
509 case SSL3_ST_CW_FINISHED_B:
510 ret = ssl3_send_finished(s,
511 SSL3_ST_CW_FINISHED_A,
512 SSL3_ST_CW_FINISHED_B,
514 ssl3_enc->client_finished_label,
516 ssl3_enc->client_finished_label_len);
519 s->state = SSL3_ST_CW_FLUSH;
522 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
524 s->s3->tmp.next_state = SSL_ST_OK;
525 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
526 s->state = SSL_ST_OK;
527 s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
528 s->s3->delay_buf_pop_ret = 0;
532 * Allow NewSessionTicket if ticket expected
534 if (s->tlsext_ticket_expected)
535 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
537 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
542 case SSL3_ST_CR_SESSION_TICKET_A:
543 case SSL3_ST_CR_SESSION_TICKET_B:
544 ret = ssl3_get_new_session_ticket(s);
547 s->state = SSL3_ST_CR_FINISHED_A;
551 case SSL3_ST_CR_CERT_STATUS_A:
552 case SSL3_ST_CR_CERT_STATUS_B:
553 ret = ssl3_get_cert_status(s);
556 s->state = SSL3_ST_CR_KEY_EXCH_A;
560 case SSL3_ST_CR_FINISHED_A:
561 case SSL3_ST_CR_FINISHED_B:
562 if (!s->s3->change_cipher_spec)
563 s->s3->flags |= SSL3_FLAGS_CCS_OK;
564 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
565 SSL3_ST_CR_FINISHED_B);
570 s->state = SSL3_ST_CW_CHANGE_A;
572 s->state = SSL_ST_OK;
576 case SSL3_ST_CW_FLUSH:
577 s->rwstate = SSL_WRITING;
578 if (BIO_flush(s->wbio) <= 0) {
582 s->rwstate = SSL_NOTHING;
583 s->state = s->s3->tmp.next_state;
587 /* clean a few things up */
588 ssl3_cleanup_key_block(s);
589 BUF_MEM_free(s->init_buf);
593 * If we are not 'joining' the last two packets, remove the
596 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
597 ssl_free_wbio_buffer(s);
598 /* else do it later in ssl3_write */
604 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
606 s->ctx->stats.sess_hit++;
610 s->handshake_func = ssl3_connect;
611 s->ctx->stats.sess_connect_good++;
614 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
621 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
627 /* did we do anything */
628 if (!s->s3->tmp.reuse_message && !skip) {
630 if ((ret = BIO_flush(s->wbio)) <= 0)
634 if ((cb != NULL) && (s->state != state)) {
635 new_state = s->state;
637 cb(s, SSL_CB_CONNECT_LOOP, 1);
638 s->state = new_state;
647 cb(s, SSL_CB_CONNECT_EXIT, ret);
652 * Work out what version we should be using for the initial ClientHello if
653 * the version is currently set to (D)TLS_ANY_VERSION.
654 * Returns 1 on success
657 static int ssl_set_version(SSL *s)
659 unsigned long mask, options = s->options;
661 if (s->method->version == TLS_ANY_VERSION) {
663 * SSL_OP_NO_X disables all protocols above X *if* there are
664 * some protocols below X enabled. This is required in order
665 * to maintain "version capability" vector contiguous. So
666 * that if application wants to disable TLS1.0 in favour of
667 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
668 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
670 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
671 #if !defined(OPENSSL_NO_SSL3)
675 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
676 if (options & SSL_OP_NO_TLSv1_2) {
677 if ((options & mask) != mask) {
678 s->version = TLS1_1_VERSION;
680 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
684 s->version = TLS1_2_VERSION;
687 if ((options & mask) == mask) {
688 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
691 s->version = TLS1_1_VERSION;
694 mask &= ~SSL_OP_NO_TLSv1_1;
695 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
696 s->version = TLS1_VERSION;
697 mask &= ~SSL_OP_NO_TLSv1;
698 #if !defined(OPENSSL_NO_SSL3)
699 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
700 s->version = SSL3_VERSION;
703 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
704 SSLerr(SSL_F_SSL_SET_VERSION,
705 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
709 if (s->version == SSL3_VERSION && FIPS_mode()) {
710 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
714 } else if (s->method->version == DTLS_ANY_VERSION) {
715 /* Determine which DTLS version to use */
716 /* If DTLS 1.2 disabled correct the version number */
717 if (options & SSL_OP_NO_DTLSv1_2) {
718 if (tls1_suiteb(s)) {
719 SSLerr(SSL_F_SSL_SET_VERSION,
720 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
724 * Disabling all versions is silly: return an error.
726 if (options & SSL_OP_NO_DTLSv1) {
727 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
731 * Update method so we don't use any DTLS 1.2 features.
733 s->method = DTLSv1_client_method();
734 s->version = DTLS1_VERSION;
737 * We only support one version: update method
739 if (options & SSL_OP_NO_DTLSv1)
740 s->method = DTLSv1_2_client_method();
741 s->version = DTLS1_2_VERSION;
745 s->client_version = s->version;
750 int ssl3_client_hello(SSL *s)
753 unsigned char *p, *d;
757 #ifndef OPENSSL_NO_COMP
762 buf = (unsigned char *)s->init_buf->data;
763 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
764 SSL_SESSION *sess = s->session;
766 /* Work out what SSL/TLS/DTLS version to use */
767 if (ssl_set_version(s) == 0)
770 if ((sess == NULL) || (sess->ssl_version != s->version) ||
772 * In the case of EAP-FAST, we can have a pre-shared
773 * "ticket" without a session ID.
775 (!sess->session_id_length && !sess->tlsext_tick) ||
776 (sess->not_resumable)) {
777 if (!ssl_get_new_session(s, 0))
780 /* else use the pre-loaded session */
782 p = s->s3->client_random;
785 * for DTLS if client_random is initialized, reuse it, we are
786 * required to use same upon reply to HelloVerify
788 if (SSL_IS_DTLS(s)) {
791 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
800 if (i && ssl_fill_hello_random(s, 0, p,
801 sizeof(s->s3->client_random)) <= 0)
804 /* Do the message type and length last */
805 d = p = ssl_handshake_start(s);
808 * version indicates the negotiated version: for example from
809 * an SSLv2/v3 compatible client hello). The client_version
810 * field is the maximum version we permit and it is also
811 * used in RSA encrypted premaster secrets. Some servers can
812 * choke if we initially report a higher version then
813 * renegotiate to a lower one in the premaster secret. This
814 * didn't happen with TLS 1.0 as most servers supported it
815 * but it can with TLS 1.1 or later if the server only supports
818 * Possible scenario with previous logic:
819 * 1. Client hello indicates TLS 1.2
820 * 2. Server hello says TLS 1.0
821 * 3. RSA encrypted premaster secret uses 1.2.
822 * 4. Handhaked proceeds using TLS 1.0.
823 * 5. Server sends hello request to renegotiate.
824 * 6. Client hello indicates TLS v1.0 as we now
825 * know that is maximum server supports.
826 * 7. Server chokes on RSA encrypted premaster secret
827 * containing version 1.0.
829 * For interoperability it should be OK to always use the
830 * maximum version we support in client hello and then rely
831 * on the checking of version to ensure the servers isn't
832 * being inconsistent: for example initially negotiating with
833 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
834 * client_version in client hello and not resetting it to
835 * the negotiated version.
837 *(p++) = s->client_version >> 8;
838 *(p++) = s->client_version & 0xff;
841 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
842 p += SSL3_RANDOM_SIZE;
848 i = s->session->session_id_length;
851 if (i > (int)sizeof(s->session->session_id)) {
852 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
855 memcpy(p, s->session->session_id, i);
859 /* cookie stuff for DTLS */
860 if (SSL_IS_DTLS(s)) {
861 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
862 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
865 *(p++) = s->d1->cookie_len;
866 memcpy(p, s->d1->cookie, s->d1->cookie_len);
867 p += s->d1->cookie_len;
870 /* Ciphers supported */
871 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
873 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
876 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
878 * Some servers hang if client hello > 256 bytes as hack workaround
879 * chop number of supported ciphers to keep it well below this if we
882 if (TLS1_get_version(s) >= TLS1_2_VERSION
883 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
884 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
890 #ifdef OPENSSL_NO_COMP
894 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
897 j = sk_SSL_COMP_num(s->ctx->comp_methods);
899 for (i = 0; i < j; i++) {
900 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
904 *(p++) = 0; /* Add the NULL method */
907 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
908 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
912 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
914 ssl3_send_alert(s, SSL3_AL_FATAL, al);
915 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
920 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
921 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
922 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
925 s->state = SSL3_ST_CW_CLNT_HELLO_B;
928 /* SSL3_ST_CW_CLNT_HELLO_B */
929 return ssl_do_write(s);
931 s->state = SSL_ST_ERR;
935 int ssl3_get_server_hello(SSL *s)
937 STACK_OF(SSL_CIPHER) *sk;
939 unsigned char *p, *d;
940 int i, al = SSL_AD_INTERNAL_ERROR, ok;
943 #ifndef OPENSSL_NO_COMP
947 * Hello verify request and/or server hello version may not match so set
948 * first packet if we're negotiating version.
952 n = s->method->ssl_get_message(s,
953 SSL3_ST_CR_SRVR_HELLO_A,
954 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
960 if (SSL_IS_DTLS(s)) {
961 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
962 if (s->d1->send_cookie == 0) {
963 s->s3->tmp.reuse_message = 1;
965 } else { /* already sent a cookie */
967 al = SSL_AD_UNEXPECTED_MESSAGE;
968 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
974 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
975 al = SSL_AD_UNEXPECTED_MESSAGE;
976 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
980 d = p = (unsigned char *)s->init_msg;
982 if (s->method->version == TLS_ANY_VERSION) {
983 int sversion = (p[0] << 8) | p[1];
985 #if TLS_MAX_VERSION != TLS1_2_VERSION
986 #error Code needs updating for new TLS version
988 #ifndef OPENSSL_NO_SSL3
989 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
991 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
992 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
993 al = SSL_AD_PROTOCOL_VERSION;
996 s->method = SSLv3_client_method();
999 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
1000 s->method = TLSv1_client_method();
1001 } else if ((sversion == TLS1_1_VERSION) &&
1002 !(s->options & SSL_OP_NO_TLSv1_1)) {
1003 s->method = TLSv1_1_client_method();
1004 } else if ((sversion == TLS1_2_VERSION) &&
1005 !(s->options & SSL_OP_NO_TLSv1_2)) {
1006 s->method = TLSv1_2_client_method();
1008 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
1009 al = SSL_AD_PROTOCOL_VERSION;
1012 s->session->ssl_version = s->version = s->method->version;
1014 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
1015 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
1016 al = SSL_AD_PROTOCOL_VERSION;
1019 } else if (s->method->version == DTLS_ANY_VERSION) {
1020 /* Work out correct protocol version to use */
1021 int hversion = (p[0] << 8) | p[1];
1022 int options = s->options;
1023 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
1024 s->method = DTLSv1_2_client_method();
1025 else if (tls1_suiteb(s)) {
1026 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1027 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1028 s->version = hversion;
1029 al = SSL_AD_PROTOCOL_VERSION;
1031 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
1032 s->method = DTLSv1_client_method();
1034 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1035 s->version = hversion;
1036 al = SSL_AD_PROTOCOL_VERSION;
1039 s->session->ssl_version = s->version = s->method->version;
1040 } else if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
1041 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1042 s->version = (s->version & 0xff00) | p[1];
1043 al = SSL_AD_PROTOCOL_VERSION;
1048 /* load the server hello data */
1049 /* load the server random */
1050 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
1051 p += SSL3_RANDOM_SIZE;
1055 /* get the session-id */
1058 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
1059 al = SSL_AD_ILLEGAL_PARAMETER;
1060 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1065 * Check if we can resume the session based on external pre-shared secret.
1066 * EAP-FAST (RFC 4851) supports two types of session resumption.
1067 * Resumption based on server-side state works with session IDs.
1068 * Resumption based on pre-shared Protected Access Credentials (PACs)
1069 * works by overriding the SessionTicket extension at the application
1070 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1071 * servers would honour the session ID.) Therefore, the session ID alone
1072 * is not a reliable indicator of session resumption, so we first check if
1073 * we can resume, and later peek at the next handshake message to see if the
1074 * server wants to resume.
1076 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1077 s->session->tlsext_tick) {
1078 SSL_CIPHER *pref_cipher = NULL;
1079 s->session->master_key_length = sizeof(s->session->master_key);
1080 if (s->tls_session_secret_cb(s, s->session->master_key,
1081 &s->session->master_key_length,
1083 s->tls_session_secret_cb_arg)) {
1084 s->session->cipher = pref_cipher ?
1085 pref_cipher : ssl_get_cipher_by_char(s, p + j);
1087 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1088 al = SSL_AD_INTERNAL_ERROR;
1093 if (j != 0 && j == s->session->session_id_length
1094 && memcmp(p, s->session->session_id, j) == 0) {
1095 if (s->sid_ctx_length != s->session->sid_ctx_length
1096 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1097 /* actually a client application bug */
1098 al = SSL_AD_ILLEGAL_PARAMETER;
1099 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1100 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1106 * If we were trying for session-id reuse but the server
1107 * didn't echo the ID, make a new SSL_SESSION.
1108 * In the case of EAP-FAST and PAC, we do not send a session ID,
1109 * so the PAC-based session secret is always preserved. It'll be
1110 * overwritten if the server refuses resumption.
1112 if (s->session->session_id_length > 0) {
1113 if (!ssl_get_new_session(s, 0)) {
1117 s->session->session_id_length = j;
1118 memcpy(s->session->session_id, p, j); /* j could be 0 */
1121 c = ssl_get_cipher_by_char(s, p);
1123 /* unknown cipher */
1124 al = SSL_AD_ILLEGAL_PARAMETER;
1125 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1128 /* Set version disabled mask now we know version */
1129 if (!SSL_USE_TLS1_2_CIPHERS(s))
1130 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1132 s->s3->tmp.mask_ssl = 0;
1134 * If it is a disabled cipher we didn't send it in client hello, so
1137 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1138 al = SSL_AD_ILLEGAL_PARAMETER;
1139 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1142 p += ssl_put_cipher_by_char(s, NULL, NULL);
1144 sk = ssl_get_ciphers_by_id(s);
1145 i = sk_SSL_CIPHER_find(sk, c);
1147 /* we did not say we would use this cipher */
1148 al = SSL_AD_ILLEGAL_PARAMETER;
1149 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1154 * Depending on the session caching (internal/external), the cipher
1155 * and/or cipher_id values may not be set. Make sure that cipher_id is
1156 * set and use it for comparison.
1158 if (s->session->cipher)
1159 s->session->cipher_id = s->session->cipher->id;
1160 if (s->hit && (s->session->cipher_id != c->id)) {
1161 al = SSL_AD_ILLEGAL_PARAMETER;
1162 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1163 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1166 s->s3->tmp.new_cipher = c;
1168 * Don't digest cached records if no sigalgs: we may need them for client
1171 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
1173 /* lets get the compression algorithm */
1175 #ifdef OPENSSL_NO_COMP
1177 al = SSL_AD_ILLEGAL_PARAMETER;
1178 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1179 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1183 * If compression is disabled we'd better not try to resume a session
1184 * using compression.
1186 if (s->session->compress_meth != 0) {
1187 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1192 if (s->hit && j != s->session->compress_meth) {
1193 al = SSL_AD_ILLEGAL_PARAMETER;
1194 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1195 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1200 else if (!ssl_allow_compression(s)) {
1201 al = SSL_AD_ILLEGAL_PARAMETER;
1202 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1205 comp = ssl3_comp_find(s->ctx->comp_methods, j);
1207 if ((j != 0) && (comp == NULL)) {
1208 al = SSL_AD_ILLEGAL_PARAMETER;
1209 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1210 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1213 s->s3->tmp.new_compression = comp;
1217 /* TLS extensions */
1218 if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) {
1219 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1224 /* wrong packet length */
1225 al = SSL_AD_DECODE_ERROR;
1226 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1232 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1234 s->state = SSL_ST_ERR;
1238 int ssl3_get_server_certificate(SSL *s)
1240 int al, i, ok, ret = -1, exp_idx;
1241 unsigned long n, nc, llen, l;
1243 const unsigned char *q, *p;
1245 STACK_OF(X509) *sk = NULL;
1246 EVP_PKEY *pkey = NULL;
1248 n = s->method->ssl_get_message(s,
1251 -1, s->max_cert_list, &ok);
1256 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1257 s->s3->tmp.reuse_message = 1;
1261 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1262 al = SSL_AD_UNEXPECTED_MESSAGE;
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
1266 p = d = (unsigned char *)s->init_msg;
1268 if ((sk = sk_X509_new_null()) == NULL) {
1269 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1274 if (llen + 3 != n) {
1275 al = SSL_AD_DECODE_ERROR;
1276 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1279 for (nc = 0; nc < llen;) {
1281 if ((l + nc + 3) > llen) {
1282 al = SSL_AD_DECODE_ERROR;
1283 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1284 SSL_R_CERT_LENGTH_MISMATCH);
1289 x = d2i_X509(NULL, &q, l);
1291 al = SSL_AD_BAD_CERTIFICATE;
1292 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1296 al = SSL_AD_DECODE_ERROR;
1297 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1298 SSL_R_CERT_LENGTH_MISMATCH);
1301 if (!sk_X509_push(sk, x)) {
1302 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1310 i = ssl_verify_cert_chain(s, sk);
1311 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1312 al = ssl_verify_alarm_type(s->verify_result);
1313 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1314 SSL_R_CERTIFICATE_VERIFY_FAILED);
1317 ERR_clear_error(); /* but we keep s->verify_result */
1319 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1320 al = SSL_AD_HANDSHAKE_FAILURE;
1324 s->session->peer_chain = sk;
1326 * Inconsistency alert: cert_chain does include the peer's certificate,
1327 * which we don't include in s3_srvr.c
1329 x = sk_X509_value(sk, 0);
1332 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1335 pkey = X509_get_pubkey(x);
1337 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1340 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1341 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1345 i = ssl_cert_type(x, pkey);
1349 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1350 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1354 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1355 if (exp_idx >= 0 && i != exp_idx) {
1357 al = SSL_AD_ILLEGAL_PARAMETER;
1358 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1359 SSL_R_WRONG_CERTIFICATE_TYPE);
1362 s->session->peer_type = i;
1364 X509_free(s->session->peer);
1365 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1366 s->session->peer = x;
1367 s->session->verify_result = s->verify_result;
1374 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1376 s->state = SSL_ST_ERR;
1378 EVP_PKEY_free(pkey);
1380 sk_X509_pop_free(sk, X509_free);
1384 int ssl3_get_key_exchange(SSL *s)
1386 #ifndef OPENSSL_NO_RSA
1387 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1390 unsigned char *param, *p;
1392 long i, param_len, n, alg_k, alg_a;
1393 EVP_PKEY *pkey = NULL;
1394 const EVP_MD *md = NULL;
1395 #ifndef OPENSSL_NO_RSA
1398 #ifndef OPENSSL_NO_DH
1401 #ifndef OPENSSL_NO_EC
1402 EC_KEY *ecdh = NULL;
1403 BN_CTX *bn_ctx = NULL;
1404 EC_POINT *srvr_ecpoint = NULL;
1406 int encoded_pt_len = 0;
1409 EVP_MD_CTX_init(&md_ctx);
1412 * use same message size as in ssl3_get_certificate_request() as
1413 * ServerKeyExchange message may be skipped
1415 n = s->method->ssl_get_message(s,
1416 SSL3_ST_CR_KEY_EXCH_A,
1417 SSL3_ST_CR_KEY_EXCH_B,
1418 -1, s->max_cert_list, &ok);
1422 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1424 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1426 * Can't skip server key exchange if this is an ephemeral
1429 if (alg_k & (SSL_kDHE | SSL_kECDHE)) {
1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1431 al = SSL_AD_UNEXPECTED_MESSAGE;
1435 s->s3->tmp.reuse_message = 1;
1439 param = p = (unsigned char *)s->init_msg;
1441 #ifndef OPENSSL_NO_RSA
1442 RSA_free(s->s3->peer_rsa_tmp);
1443 s->s3->peer_rsa_tmp = NULL;
1445 #ifndef OPENSSL_NO_DH
1446 DH_free(s->s3->peer_dh_tmp);
1447 s->s3->peer_dh_tmp = NULL;
1449 #ifndef OPENSSL_NO_EC
1450 EC_KEY_free(s->s3->peer_ecdh_tmp);
1451 s->s3->peer_ecdh_tmp = NULL;
1454 /* Total length of the parameters including the length prefix */
1457 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1459 al = SSL_AD_DECODE_ERROR;
1461 #ifndef OPENSSL_NO_PSK
1462 if (alg_k & SSL_kPSK) {
1463 char tmp_id_hint[PSK_MAX_IDENTITY_LEN + 1];
1466 if (param_len > n) {
1467 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1473 * Store PSK identity hint for later use, hint is used in
1474 * ssl3_send_client_key_exchange. Assume that the maximum length of
1475 * a PSK identity hint can be as long as the maximum length of a PSK
1478 if (i > PSK_MAX_IDENTITY_LEN) {
1479 al = SSL_AD_HANDSHAKE_FAILURE;
1480 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1483 if (i > n - param_len) {
1484 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1485 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1491 * If received PSK identity hint contains NULL characters, the hint
1492 * is truncated from the first NULL. p may not be ending with NULL,
1493 * so create a NULL-terminated string.
1495 memcpy(tmp_id_hint, p, i);
1496 memset(tmp_id_hint + i, 0, PSK_MAX_IDENTITY_LEN + 1 - i);
1497 OPENSSL_free(s->session->psk_identity_hint);
1498 s->session->psk_identity_hint = BUF_strdup(tmp_id_hint);
1499 if (s->session->psk_identity_hint == NULL) {
1500 al = SSL_AD_HANDSHAKE_FAILURE;
1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1508 #endif /* !OPENSSL_NO_PSK */
1509 #ifndef OPENSSL_NO_SRP
1510 if (alg_k & SSL_kSRP) {
1512 if (param_len > n) {
1513 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1518 if (i > n - param_len) {
1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH);
1524 if ((s->srp_ctx.N = BN_bin2bn(p, i, NULL)) == NULL) {
1525 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1530 if (2 > n - param_len) {
1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1538 if (i > n - param_len) {
1539 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH);
1544 if ((s->srp_ctx.g = BN_bin2bn(p, i, NULL)) == NULL) {
1545 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1550 if (1 > n - param_len) {
1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1556 i = (unsigned int)(p[0]);
1559 if (i > n - param_len) {
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH);
1565 if ((s->srp_ctx.s = BN_bin2bn(p, i, NULL)) == NULL) {
1566 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1571 if (2 > n - param_len) {
1572 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1579 if (i > n - param_len) {
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH);
1585 if ((s->srp_ctx.B = BN_bin2bn(p, i, NULL)) == NULL) {
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1592 if (!srp_verify_server_param(s, &al)) {
1593 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1597 /* We must check if there is a certificate */
1598 if (alg_a & (SSL_aRSA|SSL_aDSS))
1599 pkey = X509_get_pubkey(s->session->peer);
1601 #endif /* !OPENSSL_NO_SRP */
1602 #ifndef OPENSSL_NO_RSA
1603 if (alg_k & SSL_kRSA) {
1604 /* Temporary RSA keys only allowed in export ciphersuites */
1605 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1606 al = SSL_AD_UNEXPECTED_MESSAGE;
1607 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1610 if ((rsa = RSA_new()) == NULL) {
1611 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1616 if (param_len > n) {
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1622 if (i > n - param_len) {
1623 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH);
1628 if ((rsa->n = BN_bin2bn(p, i, rsa->n)) == NULL) {
1629 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1634 if (2 > n - param_len) {
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1642 if (i > n - param_len) {
1643 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH);
1648 if ((rsa->e = BN_bin2bn(p, i, rsa->e)) == NULL) {
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1655 /* this should be because we are using an export cipher */
1656 if (alg_a & SSL_aRSA)
1657 pkey = X509_get_pubkey(s->session->peer);
1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1663 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
1664 al = SSL_AD_UNEXPECTED_MESSAGE;
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1669 s->s3->peer_rsa_tmp = rsa;
1672 #else /* OPENSSL_NO_RSA */
1675 #ifndef OPENSSL_NO_DH
1676 else if (alg_k & SSL_kDHE) {
1677 if ((dh = DH_new()) == NULL) {
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1683 if (param_len > n) {
1684 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1689 if (i > n - param_len) {
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH);
1695 if ((dh->p = BN_bin2bn(p, i, NULL)) == NULL) {
1696 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1701 if (2 > n - param_len) {
1702 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1709 if (i > n - param_len) {
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH);
1715 if ((dh->g = BN_bin2bn(p, i, NULL)) == NULL) {
1716 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1721 if (2 > n - param_len) {
1722 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1729 if (i > n - param_len) {
1730 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1735 if ((dh->pub_key = BN_bin2bn(p, i, NULL)) == NULL) {
1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1742 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1743 al = SSL_AD_HANDSHAKE_FAILURE;
1744 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1747 if (alg_a & (SSL_aRSA|SSL_aDSS))
1748 pkey = X509_get_pubkey(s->session->peer);
1749 /* else anonymous DH, so no certificate or pkey. */
1751 s->s3->peer_dh_tmp = dh;
1754 #endif /* !OPENSSL_NO_DH */
1756 #ifndef OPENSSL_NO_EC
1757 else if (alg_k & SSL_kECDHE) {
1759 const EC_GROUP *group;
1761 if ((ecdh = EC_KEY_new()) == NULL) {
1762 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1767 * Extract elliptic curve parameters and the server's ephemeral ECDH
1768 * public key. Keep accumulating lengths of various components in
1769 * param_len and make sure it never exceeds n.
1773 * XXX: For now we only support named (not generic) curves and the
1774 * ECParameters in this case is just three bytes. We also need one
1775 * byte for the length of the encoded point
1778 if (param_len > n) {
1779 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1783 * Check curve is one of our preferences, if not server has sent an
1784 * invalid curve. ECParameters is 3 bytes.
1786 if (!tls1_check_curve(s, p, 3)) {
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1791 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) {
1792 al = SSL_AD_INTERNAL_ERROR;
1793 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1794 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1798 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1799 if (ngroup == NULL) {
1800 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1803 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1804 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1807 EC_GROUP_free(ngroup);
1809 group = EC_KEY_get0_group(ecdh);
1811 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1812 (EC_GROUP_get_degree(group) > 163)) {
1813 al = SSL_AD_EXPORT_RESTRICTION;
1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1815 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1821 /* Next, get the encoded ECPoint */
1822 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1823 ((bn_ctx = BN_CTX_new()) == NULL)) {
1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1828 encoded_pt_len = *p; /* length of encoded point */
1831 if ((encoded_pt_len > n - param_len) ||
1832 (EC_POINT_oct2point(group, srvr_ecpoint,
1833 p, encoded_pt_len, bn_ctx) == 0)) {
1834 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1837 param_len += encoded_pt_len;
1840 p += encoded_pt_len;
1843 * The ECC/TLS specification does not mention the use of DSA to sign
1844 * ECParameters in the server key exchange message. We do support RSA
1848 # ifndef OPENSSL_NO_RSA
1849 else if (alg_a & SSL_aRSA)
1850 pkey = X509_get_pubkey(s->session->peer);
1852 # ifndef OPENSSL_NO_EC
1853 else if (alg_a & SSL_aECDSA)
1854 pkey = X509_get_pubkey(s->session->peer);
1856 /* else anonymous ECDH, so no certificate or pkey. */
1857 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1858 s->s3->peer_ecdh_tmp = ecdh;
1860 BN_CTX_free(bn_ctx);
1862 EC_POINT_free(srvr_ecpoint);
1863 srvr_ecpoint = NULL;
1865 al = SSL_AD_UNEXPECTED_MESSAGE;
1866 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1869 #endif /* !OPENSSL_NO_EC */
1871 /* p points to the next byte, there are 'n' bytes left */
1873 /* if it was signed, check the signature */
1875 if (SSL_USE_SIGALGS(s)) {
1878 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1881 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1888 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1896 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1901 j = EVP_PKEY_size(pkey);
1904 * Check signature length. If n is 0 then signature is empty
1906 if ((i != n) || (n > j) || (n <= 0)) {
1907 /* wrong packet length */
1908 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1911 #ifndef OPENSSL_NO_RSA
1912 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1918 for (num = 2; num > 0; num--) {
1919 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1920 EVP_DigestInit_ex(&md_ctx, (num == 2)
1921 ? s->ctx->md5 : s->ctx->sha1, NULL);
1922 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1924 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1926 EVP_DigestUpdate(&md_ctx, param, param_len);
1927 EVP_DigestFinal_ex(&md_ctx, q, &size);
1931 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa);
1933 al = SSL_AD_DECRYPT_ERROR;
1934 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1939 al = SSL_AD_DECRYPT_ERROR;
1940 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1946 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1947 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1949 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1951 EVP_VerifyUpdate(&md_ctx, param, param_len);
1952 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1954 al = SSL_AD_DECRYPT_ERROR;
1955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1960 /* aNULL, aSRP or kPSK do not need public keys */
1961 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) {
1962 /* Might be wrong key type, check it */
1963 if (ssl3_check_cert_and_algorithm(s))
1964 /* Otherwise this shouldn't happen */
1965 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1968 /* still data left over */
1970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1974 EVP_PKEY_free(pkey);
1975 EVP_MD_CTX_cleanup(&md_ctx);
1978 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1980 EVP_PKEY_free(pkey);
1981 #ifndef OPENSSL_NO_RSA
1984 #ifndef OPENSSL_NO_DH
1987 #ifndef OPENSSL_NO_EC
1988 BN_CTX_free(bn_ctx);
1989 EC_POINT_free(srvr_ecpoint);
1992 EVP_MD_CTX_cleanup(&md_ctx);
1993 s->state = SSL_ST_ERR;
1997 int ssl3_get_certificate_request(SSL *s)
2000 unsigned long n, nc, l;
2001 unsigned int llen, ctype_num, i;
2002 X509_NAME *xn = NULL;
2003 const unsigned char *p, *q;
2005 STACK_OF(X509_NAME) *ca_sk = NULL;
2007 n = s->method->ssl_get_message(s,
2008 SSL3_ST_CR_CERT_REQ_A,
2009 SSL3_ST_CR_CERT_REQ_B,
2010 -1, s->max_cert_list, &ok);
2015 s->s3->tmp.cert_req = 0;
2017 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
2018 s->s3->tmp.reuse_message = 1;
2020 * If we get here we don't need any cached handshake records as we
2021 * wont be doing client auth.
2023 if (!ssl3_digest_cached_records(s, 0))
2028 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
2029 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2030 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
2034 /* TLS does not like anon-DH with client cert */
2035 if (s->version > SSL3_VERSION) {
2036 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
2037 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2038 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2039 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2044 p = d = (unsigned char *)s->init_msg;
2046 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
2047 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2051 /* get the certificate types */
2053 OPENSSL_free(s->cert->ctypes);
2054 s->cert->ctypes = NULL;
2055 if (ctype_num > SSL3_CT_NUMBER) {
2056 /* If we exceed static buffer copy all to cert structure */
2057 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2058 if (s->cert->ctypes == NULL) {
2059 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2062 memcpy(s->cert->ctypes, p, ctype_num);
2063 s->cert->ctype_num = (size_t)ctype_num;
2064 ctype_num = SSL3_CT_NUMBER;
2066 for (i = 0; i < ctype_num; i++)
2067 s->s3->tmp.ctype[i] = p[i];
2069 if (SSL_USE_SIGALGS(s)) {
2072 * Check we have enough room for signature algorithms and following
2075 if ((unsigned long)(p - d + llen + 2) > n) {
2076 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2077 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2078 SSL_R_DATA_LENGTH_TOO_LONG);
2081 /* Clear certificate digests and validity flags */
2082 for (i = 0; i < SSL_PKEY_NUM; i++) {
2083 s->s3->tmp.md[i] = NULL;
2084 s->s3->tmp.valid_flags[i] = 0;
2086 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) {
2087 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2089 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2092 if (!tls1_process_sigalgs(s)) {
2093 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2094 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2100 /* get the CA RDNs */
2103 if ((unsigned long)(p - d + llen) != n) {
2104 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2105 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2109 for (nc = 0; nc < llen;) {
2111 if ((l + nc + 2) > llen) {
2112 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2113 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG);
2119 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
2120 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2121 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2126 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2127 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2128 SSL_R_CA_DN_LENGTH_MISMATCH);
2131 if (!sk_X509_NAME_push(ca_sk, xn)) {
2132 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2140 /* we should setup a certificate to return.... */
2141 s->s3->tmp.cert_req = 1;
2142 s->s3->tmp.ctype_num = ctype_num;
2143 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2144 s->s3->tmp.ca_names = ca_sk;
2150 s->state = SSL_ST_ERR;
2152 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2156 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
2158 return (X509_NAME_cmp(*a, *b));
2161 int ssl3_get_new_session_ticket(SSL *s)
2163 int ok, al, ret = 0, ticklen;
2165 const unsigned char *p;
2168 n = s->method->ssl_get_message(s,
2169 SSL3_ST_CR_SESSION_TICKET_A,
2170 SSL3_ST_CR_SESSION_TICKET_B,
2171 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
2177 /* need at least ticket_lifetime_hint + ticket length */
2178 al = SSL_AD_DECODE_ERROR;
2179 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2183 p = d = (unsigned char *)s->init_msg;
2185 if (s->session->session_id_length > 0) {
2186 int i = s->session_ctx->session_cache_mode;
2187 SSL_SESSION *new_sess;
2189 * We reused an existing session, so we need to replace it with a new
2192 if (i & SSL_SESS_CACHE_CLIENT) {
2194 * Remove the old session from the cache
2196 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
2197 if (s->session_ctx->remove_session_cb != NULL)
2198 s->session_ctx->remove_session_cb(s->session_ctx,
2201 /* We carry on if this fails */
2202 SSL_CTX_remove_session(s->session_ctx, s->session);
2206 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
2207 al = SSL_AD_INTERNAL_ERROR;
2208 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2212 SSL_SESSION_free(s->session);
2213 s->session = new_sess;
2216 n2l(p, s->session->tlsext_tick_lifetime_hint);
2218 /* ticket_lifetime_hint + ticket_length + ticket */
2219 if (ticklen + 6 != n) {
2220 al = SSL_AD_DECODE_ERROR;
2221 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2224 OPENSSL_free(s->session->tlsext_tick);
2225 s->session->tlsext_ticklen = 0;
2226 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2227 if (!s->session->tlsext_tick) {
2228 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2231 memcpy(s->session->tlsext_tick, p, ticklen);
2232 s->session->tlsext_ticklen = ticklen;
2234 * There are two ways to detect a resumed ticket session. One is to set
2235 * an appropriate session ID and then the server must return a match in
2236 * ServerHello. This allows the normal client session ID matching to work
2237 * and we know much earlier that the ticket has been accepted. The
2238 * other way is to set zero length session ID when the ticket is
2239 * presented and rely on the handshake to determine session resumption.
2240 * We choose the former approach because this fits in with assumptions
2241 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2242 * SHA256 is disabled) hash of the ticket.
2244 EVP_Digest(p, ticklen,
2245 s->session->session_id, &s->session->session_id_length,
2246 EVP_sha256(), NULL);
2250 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2252 s->state = SSL_ST_ERR;
2256 int ssl3_get_cert_status(SSL *s)
2259 unsigned long resplen, n;
2260 const unsigned char *p;
2262 n = s->method->ssl_get_message(s,
2263 SSL3_ST_CR_CERT_STATUS_A,
2264 SSL3_ST_CR_CERT_STATUS_B,
2265 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
2270 /* need at least status type + length */
2271 al = SSL_AD_DECODE_ERROR;
2272 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2275 p = (unsigned char *)s->init_msg;
2276 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
2277 al = SSL_AD_DECODE_ERROR;
2278 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2282 if (resplen + 4 != n) {
2283 al = SSL_AD_DECODE_ERROR;
2284 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2287 OPENSSL_free(s->tlsext_ocsp_resp);
2288 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2289 if (!s->tlsext_ocsp_resp) {
2290 al = SSL_AD_INTERNAL_ERROR;
2291 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2294 s->tlsext_ocsp_resplen = resplen;
2295 if (s->ctx->tlsext_status_cb) {
2297 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2299 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2300 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2304 al = SSL_AD_INTERNAL_ERROR;
2305 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2311 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2312 s->state = SSL_ST_ERR;
2316 int ssl3_get_server_done(SSL *s)
2321 /* Second to last param should be very small, like 0 :-) */
2322 n = s->method->ssl_get_message(s,
2323 SSL3_ST_CR_SRVR_DONE_A,
2324 SSL3_ST_CR_SRVR_DONE_B,
2325 SSL3_MT_SERVER_DONE, 30, &ok);
2330 /* should contain no data */
2331 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2332 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2333 s->state = SSL_ST_ERR;
2340 int ssl3_send_client_key_exchange(SSL *s)
2344 unsigned long alg_k;
2345 #ifndef OPENSSL_NO_RSA
2347 EVP_PKEY *pkey = NULL;
2349 #ifndef OPENSSL_NO_EC
2350 EC_KEY *clnt_ecdh = NULL;
2351 const EC_POINT *srvr_ecpoint = NULL;
2352 EVP_PKEY *srvr_pub_pkey = NULL;
2353 unsigned char *encodedPoint = NULL;
2354 int encoded_pt_len = 0;
2355 BN_CTX *bn_ctx = NULL;
2357 unsigned char *pms = NULL;
2360 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
2361 p = ssl_handshake_start(s);
2363 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2365 /* Fool emacs indentation */
2368 #ifndef OPENSSL_NO_RSA
2369 else if (alg_k & SSL_kRSA) {
2371 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2372 pms = OPENSSL_malloc(pmslen);
2376 if (s->session->peer == NULL) {
2378 * We should always have a server certificate with SSL_kRSA.
2380 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2381 ERR_R_INTERNAL_ERROR);
2385 if (s->s3->peer_rsa_tmp != NULL)
2386 rsa = s->s3->peer_rsa_tmp;
2388 pkey = X509_get_pubkey(s->session->peer);
2389 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2390 || (pkey->pkey.rsa == NULL)) {
2391 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2392 ERR_R_INTERNAL_ERROR);
2395 rsa = pkey->pkey.rsa;
2396 EVP_PKEY_free(pkey);
2399 pms[0] = s->client_version >> 8;
2400 pms[1] = s->client_version & 0xff;
2401 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2405 /* Fix buf for TLS and beyond */
2406 if (s->version > SSL3_VERSION)
2408 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2410 if (s->options & SSL_OP_PKCS1_CHECK_1)
2412 if (s->options & SSL_OP_PKCS1_CHECK_2)
2416 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2417 SSL_R_BAD_RSA_ENCRYPT);
2421 /* Fix buf for TLS and beyond */
2422 if (s->version > SSL3_VERSION) {
2428 #ifndef OPENSSL_NO_DH
2429 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) {
2430 DH *dh_srvr, *dh_clnt;
2431 if (s->s3->peer_dh_tmp != NULL)
2432 dh_srvr = s->s3->peer_dh_tmp;
2434 /* we get them from the cert */
2435 EVP_PKEY *spkey = NULL;
2437 spkey = X509_get_pubkey(s->session->peer);
2439 dh_srvr = EVP_PKEY_get1_DH(spkey);
2440 EVP_PKEY_free(spkey);
2442 if (dh_srvr == NULL) {
2443 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2444 ERR_R_INTERNAL_ERROR);
2448 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2449 /* Use client certificate key */
2450 EVP_PKEY *clkey = s->cert->key->privatekey;
2453 dh_clnt = EVP_PKEY_get1_DH(clkey);
2454 if (dh_clnt == NULL) {
2455 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2456 ERR_R_INTERNAL_ERROR);
2460 /* generate a new random key */
2461 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2462 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2465 if (!DH_generate_key(dh_clnt)) {
2466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2472 pmslen = DH_size(dh_clnt);
2473 pms = OPENSSL_malloc(pmslen);
2478 * use the 'p' output buffer for the DH key, but make sure to
2479 * clear it out afterwards
2482 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
2483 if (s->s3->peer_dh_tmp == NULL)
2487 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2493 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2496 /* send off the data */
2497 n = BN_num_bytes(dh_clnt->pub_key);
2499 BN_bn2bin(dh_clnt->pub_key, p);
2507 #ifndef OPENSSL_NO_EC
2508 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe)) {
2509 const EC_GROUP *srvr_group = NULL;
2511 int ecdh_clnt_cert = 0;
2514 * Did we send out the client's ECDH share for use in premaster
2515 * computation as part of client certificate? If so, set
2516 * ecdh_clnt_cert to 1.
2518 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
2520 * XXX: For now, we do not support client
2521 * authentication using ECDH certificates.
2522 * To add such support, one needs to add
2523 * code that checks for appropriate
2524 * conditions and sets ecdh_clnt_cert to 1.
2525 * For example, the cert have an ECC
2526 * key on the same curve as the server's
2527 * and the key should be authorized for
2530 * One also needs to add code in ssl3_connect
2531 * to skip sending the certificate verify
2534 * if ((s->cert->key->privatekey != NULL) &&
2535 * (s->cert->key->privatekey->type ==
2536 * EVP_PKEY_EC) && ...)
2537 * ecdh_clnt_cert = 1;
2541 if (s->s3->peer_ecdh_tmp != NULL) {
2542 tkey = s->s3->peer_ecdh_tmp;
2544 /* Get the Server Public Key from Cert */
2545 srvr_pub_pkey = X509_get_pubkey(s->session->peer);
2546 if ((srvr_pub_pkey == NULL)
2547 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2548 || (srvr_pub_pkey->pkey.ec == NULL)) {
2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2550 ERR_R_INTERNAL_ERROR);
2554 tkey = srvr_pub_pkey->pkey.ec;
2557 srvr_group = EC_KEY_get0_group(tkey);
2558 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2560 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2561 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2562 ERR_R_INTERNAL_ERROR);
2566 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2568 ERR_R_MALLOC_FAILURE);
2572 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2573 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2576 if (ecdh_clnt_cert) {
2578 * Reuse key info from our certificate We only need our
2579 * private key to perform the ECDH computation.
2581 const BIGNUM *priv_key;
2582 tkey = s->cert->key->privatekey->pkey.ec;
2583 priv_key = EC_KEY_get0_private_key(tkey);
2584 if (priv_key == NULL) {
2585 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2586 ERR_R_MALLOC_FAILURE);
2589 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2590 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2594 /* Generate a new ECDH key pair */
2595 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2596 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2603 * use the 'p' output buffer for the ECDH key, but make sure to
2604 * clear it out afterwards
2607 field_size = EC_GROUP_get_degree(srvr_group);
2608 if (field_size <= 0) {
2609 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2612 pmslen = (field_size + 7) / 8;
2613 pms = OPENSSL_malloc(pmslen);
2616 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2617 if (n <= 0 || pmslen != (size_t)n) {
2618 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2622 if (ecdh_clnt_cert) {
2623 /* Send empty client key exch message */
2627 * First check the size of encoding and allocate memory
2631 EC_POINT_point2oct(srvr_group,
2632 EC_KEY_get0_public_key(clnt_ecdh),
2633 POINT_CONVERSION_UNCOMPRESSED,
2636 encodedPoint = (unsigned char *)
2637 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2638 bn_ctx = BN_CTX_new();
2639 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2641 ERR_R_MALLOC_FAILURE);
2645 /* Encode the public key */
2646 n = EC_POINT_point2oct(srvr_group,
2647 EC_KEY_get0_public_key(clnt_ecdh),
2648 POINT_CONVERSION_UNCOMPRESSED,
2649 encodedPoint, encoded_pt_len, bn_ctx);
2651 *p = n; /* length of encoded point */
2652 /* Encoded point will be copied here */
2654 /* copy the point */
2655 memcpy(p, encodedPoint, n);
2656 /* increment n to account for length field */
2660 /* Free allocated memory */
2661 BN_CTX_free(bn_ctx);
2662 OPENSSL_free(encodedPoint);
2663 EC_KEY_free(clnt_ecdh);
2664 EVP_PKEY_free(srvr_pub_pkey);
2666 #endif /* !OPENSSL_NO_EC */
2667 else if (alg_k & SSL_kGOST) {
2668 /* GOST key exchange message creation */
2669 EVP_PKEY_CTX *pkey_ctx;
2672 unsigned int md_len;
2673 unsigned char shared_ukm[32], tmp[256];
2674 EVP_MD_CTX *ukm_hash;
2678 pms = OPENSSL_malloc(pmslen);
2683 * Get server sertificate PKEY and create ctx from it
2685 peer_cert = s->session->peer;
2687 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2688 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2692 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2693 X509_get_pubkey(peer_cert), NULL);
2695 * If we have send a certificate, and certificate key
2697 * * parameters match those of server certificate, use
2698 * certificate key for key exchange
2701 /* Otherwise, generate ephemeral key pair */
2703 EVP_PKEY_encrypt_init(pkey_ctx);
2704 /* Generate session key */
2705 if (RAND_bytes(pms, pmslen) <= 0) {
2706 EVP_PKEY_CTX_free(pkey_ctx);
2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2708 ERR_R_INTERNAL_ERROR);
2712 * If we have client certificate, use its secret as peer key
2714 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2715 if (EVP_PKEY_derive_set_peer
2716 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2718 * If there was an error - just ignore it. Ephemeral key
2725 * Compute shared IV and store it in algorithm-specific context
2728 ukm_hash = EVP_MD_CTX_create();
2729 EVP_DigestInit(ukm_hash,
2730 EVP_get_digestbynid(NID_id_GostR3411_94));
2731 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2733 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2735 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2736 EVP_MD_CTX_destroy(ukm_hash);
2737 if (EVP_PKEY_CTX_ctrl
2738 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2744 /* Make GOST keytransport blob message */
2746 * Encapsulate it into sequence
2748 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2750 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2755 if (msglen >= 0x80) {
2757 *(p++) = msglen & 0xff;
2760 *(p++) = msglen & 0xff;
2763 memcpy(p, tmp, msglen);
2764 /* Check if pubkey from client certificate was used */
2765 if (EVP_PKEY_CTX_ctrl
2766 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2767 /* Set flag "skip certificate verify" */
2768 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2770 EVP_PKEY_CTX_free(pkey_ctx);
2771 EVP_PKEY_free(pub_key);
2774 #ifndef OPENSSL_NO_SRP
2775 else if (alg_k & SSL_kSRP) {
2776 if (s->srp_ctx.A != NULL) {
2777 /* send off the data */
2778 n = BN_num_bytes(s->srp_ctx.A);
2780 BN_bn2bin(s->srp_ctx.A, p);
2783 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2784 ERR_R_INTERNAL_ERROR);
2787 OPENSSL_free(s->session->srp_username);
2788 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2789 if (s->session->srp_username == NULL) {
2790 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2791 ERR_R_MALLOC_FAILURE);
2796 #ifndef OPENSSL_NO_PSK
2797 else if (alg_k & SSL_kPSK) {
2799 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2800 * \0-terminated identity. The last byte is for us for simulating
2803 char identity[PSK_MAX_IDENTITY_LEN + 2];
2804 size_t identity_len;
2805 unsigned char *t = NULL;
2806 unsigned int psk_len = 0;
2810 if (s->psk_client_callback == NULL) {
2811 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2812 SSL_R_PSK_NO_CLIENT_CB);
2816 memset(identity, 0, sizeof(identity));
2817 /* Allocate maximum size buffer */
2818 pmslen = PSK_MAX_PSK_LEN * 2 + 4;
2819 pms = OPENSSL_malloc(pmslen);
2823 psk_len = s->psk_client_callback(s, s->session->psk_identity_hint,
2824 identity, sizeof(identity) - 1,
2826 if (psk_len > PSK_MAX_PSK_LEN) {
2827 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2828 ERR_R_INTERNAL_ERROR);
2830 } else if (psk_len == 0) {
2831 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2832 SSL_R_PSK_IDENTITY_NOT_FOUND);
2835 /* Change pmslen to real length */
2836 pmslen = 2 + psk_len + 2 + psk_len;
2837 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
2838 identity_len = strlen(identity);
2839 if (identity_len > PSK_MAX_IDENTITY_LEN) {
2840 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2841 ERR_R_INTERNAL_ERROR);
2844 /* create PSK pre_master_secret */
2846 memmove(pms + psk_len + 4, pms, psk_len);
2848 memset(t, 0, psk_len);
2852 OPENSSL_free(s->session->psk_identity);
2853 s->session->psk_identity = BUF_strdup(identity);
2854 if (s->session->psk_identity == NULL) {
2855 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2856 ERR_R_MALLOC_FAILURE);
2860 s2n(identity_len, p);
2861 memcpy(p, identity, identity_len);
2862 n = 2 + identity_len;
2865 OPENSSL_cleanse(identity, sizeof(identity));
2867 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2873 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2878 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2879 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2884 s->state = SSL3_ST_CW_KEY_EXCH_B;
2887 /* SSL3_ST_CW_KEY_EXCH_B */
2888 n = ssl_do_write(s);
2889 #ifndef OPENSSL_NO_SRP
2891 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2893 * If everything written generate master key: no need to save PMS as
2894 * SRP_generate_client_master_secret generates it internally.
2897 if ((s->session->master_key_length =
2898 SRP_generate_client_master_secret(s,
2899 s->session->master_key)) <
2901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2902 ERR_R_INTERNAL_ERROR);
2908 /* If we haven't written everything save PMS */
2910 s->s3->tmp.pms = pms;
2911 s->s3->tmp.pmslen = pmslen;
2913 /* If we don't have a PMS restore */
2915 pms = s->s3->tmp.pms;
2916 pmslen = s->s3->tmp.pmslen;
2919 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2920 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2923 s->session->master_key_length =
2924 s->method->ssl3_enc->generate_master_secret(s,
2926 session->master_key,
2928 OPENSSL_clear_free(pms, pmslen);
2929 s->s3->tmp.pms = NULL;
2930 if (s->session->master_key_length < 0) {
2931 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2932 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2938 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2939 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2941 OPENSSL_clear_free(pms, pmslen);
2942 s->s3->tmp.pms = NULL;
2943 #ifndef OPENSSL_NO_EC
2944 BN_CTX_free(bn_ctx);
2945 OPENSSL_free(encodedPoint);
2946 EC_KEY_free(clnt_ecdh);
2947 EVP_PKEY_free(srvr_pub_pkey);
2949 s->state = SSL_ST_ERR;
2953 int ssl3_send_client_verify(SSL *s)
2956 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2958 EVP_PKEY_CTX *pctx = NULL;
2964 EVP_MD_CTX_init(&mctx);
2966 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2967 p = ssl_handshake_start(s);
2968 pkey = s->cert->key->privatekey;
2969 /* Create context from key and test if sha1 is allowed as digest */
2970 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2971 EVP_PKEY_sign_init(pctx);
2972 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2973 if (!SSL_USE_SIGALGS(s))
2974 s->method->ssl3_enc->cert_verify_mac(s,
2977 [MD5_DIGEST_LENGTH]));
2982 * For TLS v1.2 send signature algorithm and signature using agreed
2983 * digest and cached handshake records.
2985 if (SSL_USE_SIGALGS(s)) {
2988 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2989 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2990 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
2991 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2996 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2999 if (!EVP_SignInit_ex(&mctx, md, NULL)
3000 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3001 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
3002 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB);
3007 /* Digest cached records and discard handshake buffer */
3008 if (!ssl3_digest_cached_records(s, 0))
3011 #ifndef OPENSSL_NO_RSA
3012 if (pkey->type == EVP_PKEY_RSA) {
3013 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
3014 if (RSA_sign(NID_md5_sha1, data,
3015 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
3016 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
3017 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
3024 #ifndef OPENSSL_NO_DSA
3025 if (pkey->type == EVP_PKEY_DSA) {
3026 if (!DSA_sign(pkey->save_type,
3027 &(data[MD5_DIGEST_LENGTH]),
3028 SHA_DIGEST_LENGTH, &(p[2]),
3029 (unsigned int *)&j, pkey->pkey.dsa)) {
3030 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
3037 #ifndef OPENSSL_NO_EC
3038 if (pkey->type == EVP_PKEY_EC) {
3039 if (!ECDSA_sign(pkey->save_type,
3040 &(data[MD5_DIGEST_LENGTH]),
3041 SHA_DIGEST_LENGTH, &(p[2]),
3042 (unsigned int *)&j, pkey->pkey.ec)) {
3043 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
3050 if (pkey->type == NID_id_GostR3410_94
3051 || pkey->type == NID_id_GostR3410_2001) {
3052 unsigned char signbuf[64];
3054 size_t sigsize = 64;
3055 s->method->ssl3_enc->cert_verify_mac(s,
3056 NID_id_GostR3411_94, data);
3057 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3061 for (i = 63, j = 0; i >= 0; j++, i--) {
3062 p[2 + j] = signbuf[i];
3067 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3070 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
3071 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3074 s->state = SSL3_ST_CW_CERT_VRFY_B;
3076 EVP_MD_CTX_cleanup(&mctx);
3077 EVP_PKEY_CTX_free(pctx);
3078 return ssl_do_write(s);
3080 EVP_MD_CTX_cleanup(&mctx);
3081 EVP_PKEY_CTX_free(pctx);
3082 s->state = SSL_ST_ERR;
3087 * Check a certificate can be used for client authentication. Currently check
3088 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
3089 * certificates can be used and optionally checks suitability for Suite B.
3091 static int ssl3_check_client_certificate(SSL *s)
3093 unsigned long alg_k;
3094 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3096 /* If no suitable signature algorithm can't use certificate */
3097 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
3100 * If strict mode check suitability of chain before using it. This also
3101 * adjusts suite B digest if necessary.
3103 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3104 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3106 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3107 /* See if we can use client certificate for fixed DH */
3108 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3109 int i = s->session->peer_type;
3110 EVP_PKEY *clkey = NULL, *spkey = NULL;
3111 clkey = s->cert->key->privatekey;
3112 /* If client key not DH assume it can be used */
3113 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3116 spkey = X509_get_pubkey(s->session->peer);
3118 /* Compare server and client parameters */
3119 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3120 EVP_PKEY_free(spkey);
3124 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3129 int ssl3_send_client_certificate(SSL *s)
3132 EVP_PKEY *pkey = NULL;
3135 if (s->state == SSL3_ST_CW_CERT_A) {
3136 /* Let cert callback update client certificates if required */
3137 if (s->cert->cert_cb) {
3138 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3140 s->rwstate = SSL_X509_LOOKUP;
3144 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3145 s->state = SSL_ST_ERR;
3148 s->rwstate = SSL_NOTHING;
3150 if (ssl3_check_client_certificate(s))
3151 s->state = SSL3_ST_CW_CERT_C;
3153 s->state = SSL3_ST_CW_CERT_B;
3156 /* We need to get a client cert */
3157 if (s->state == SSL3_ST_CW_CERT_B) {
3159 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3160 * return(-1); We then get retied later
3163 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3165 s->rwstate = SSL_X509_LOOKUP;
3168 s->rwstate = SSL_NOTHING;
3169 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3170 s->state = SSL3_ST_CW_CERT_B;
3171 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3173 } else if (i == 1) {
3175 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
3176 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3180 EVP_PKEY_free(pkey);
3181 if (i && !ssl3_check_client_certificate(s))
3184 if (s->version == SSL3_VERSION) {
3185 s->s3->tmp.cert_req = 0;
3186 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3189 s->s3->tmp.cert_req = 2;
3190 if (!ssl3_digest_cached_records(s, 0)) {
3191 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3192 s->state = SSL_ST_ERR;
3198 /* Ok, we have a cert */
3199 s->state = SSL3_ST_CW_CERT_C;
3202 if (s->state == SSL3_ST_CW_CERT_C) {
3203 s->state = SSL3_ST_CW_CERT_D;
3204 if (!ssl3_output_cert_chain(s,
3205 (s->s3->tmp.cert_req ==
3206 2) ? NULL : s->cert->key)) {
3207 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3208 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3209 s->state = SSL_ST_ERR;
3213 /* SSL3_ST_CW_CERT_D */
3214 return ssl_do_write(s);
3217 #define has_bits(i,m) (((i)&(m)) == (m))
3219 int ssl3_check_cert_and_algorithm(SSL *s)
3223 EVP_PKEY *pkey = NULL;
3225 #ifndef OPENSSL_NO_RSA
3228 #ifndef OPENSSL_NO_DH
3231 int al = SSL_AD_HANDSHAKE_FAILURE;
3233 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3234 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
3236 /* we don't have a certificate */
3237 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
3239 #ifndef OPENSSL_NO_RSA
3240 rsa = s->s3->peer_rsa_tmp;
3242 #ifndef OPENSSL_NO_DH
3243 dh = s->s3->peer_dh_tmp;
3246 /* This is the passed certificate */
3248 idx = s->session->peer_type;
3249 #ifndef OPENSSL_NO_EC
3250 if (idx == SSL_PKEY_ECC) {
3251 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
3253 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3258 } else if (alg_a & SSL_aECDSA) {
3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3260 SSL_R_MISSING_ECDSA_SIGNING_CERT);
3262 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
3263 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
3267 pkey = X509_get_pubkey(s->session->peer);
3268 pkey_bits = EVP_PKEY_bits(pkey);
3269 i = X509_certificate_type(s->session->peer, pkey);
3270 EVP_PKEY_free(pkey);
3272 /* Check that we have a certificate if we require one */
3273 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3274 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3275 SSL_R_MISSING_RSA_SIGNING_CERT);
3278 #ifndef OPENSSL_NO_DSA
3279 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3280 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3281 SSL_R_MISSING_DSA_SIGNING_CERT);
3285 #ifndef OPENSSL_NO_RSA
3286 if (alg_k & SSL_kRSA) {
3287 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3288 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3289 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3290 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3292 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
3293 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3294 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3295 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3296 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3300 /* server key exchange is not allowed. */
3301 al = SSL_AD_INTERNAL_ERROR;
3302 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3309 #ifndef OPENSSL_NO_DH
3310 if ((alg_k & SSL_kDHE) && (dh == NULL)) {
3311 al = SSL_AD_INTERNAL_ERROR;
3312 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3314 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3315 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3316 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3317 SSL_R_MISSING_DH_RSA_CERT);
3320 # ifndef OPENSSL_NO_DSA
3321 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3322 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3324 SSL_R_MISSING_DH_DSA_CERT);
3330 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3331 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3332 #ifndef OPENSSL_NO_RSA
3333 if (alg_k & SSL_kRSA) {
3335 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3336 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3338 } else if (RSA_bits(rsa) >
3339 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3340 /* We have a temporary RSA key but it's too large. */
3341 al = SSL_AD_EXPORT_RESTRICTION;
3342 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3343 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3348 #ifndef OPENSSL_NO_DH
3349 if (alg_k & SSL_kDHE) {
3351 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3352 /* We have a temporary DH key but it's too large. */
3353 al = SSL_AD_EXPORT_RESTRICTION;
3354 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3355 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3358 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3359 /* The cert should have had an export DH key. */
3360 al = SSL_AD_EXPORT_RESTRICTION;
3361 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3362 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3368 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3374 ssl3_send_alert(s, SSL3_AL_FATAL, al);
3379 * Normally, we can tell if the server is resuming the session from
3380 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server
3381 * message after the ServerHello to determine if the server is resuming.
3382 * Therefore, we allow EAP-FAST to peek ahead.
3383 * ssl3_check_finished returns 1 if we are resuming from an external
3384 * pre-shared secret, we have a "ticket" and the next server handshake message
3385 * is Finished; and 0 otherwise. It returns -1 upon an error.
3387 static int ssl3_check_finished(SSL *s)
3391 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb ||
3392 !s->session->tlsext_tick)
3395 /* Need to permit this temporarily, in case the next message is Finished. */
3396 s->s3->flags |= SSL3_FLAGS_CCS_OK;
3398 * This function is called when we might get a Certificate message instead,
3399 * so permit appropriate message length.
3400 * We ignore the return value as we're only interested in the message type
3401 * and not its length.
3403 s->method->ssl_get_message(s,
3406 -1, s->max_cert_list, &ok);
3407 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
3412 s->s3->tmp.reuse_message = 1;
3414 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
3417 /* If we're not done, then the CCS arrived early and we should bail. */
3418 if (s->s3->change_cipher_spec) {
3419 SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY);
3420 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
3427 #ifndef OPENSSL_NO_NEXTPROTONEG
3428 int ssl3_send_next_proto(SSL *s)
3430 unsigned int len, padding_len;
3433 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3434 len = s->next_proto_negotiated_len;
3435 padding_len = 32 - ((len + 2) % 32);
3436 d = (unsigned char *)s->init_buf->data;
3438 memcpy(d + 5, s->next_proto_negotiated, len);
3439 d[5 + len] = padding_len;
3440 memset(d + 6 + len, 0, padding_len);
3441 *(d++) = SSL3_MT_NEXT_PROTO;
3442 l2n3(2 + len + padding_len, d);
3443 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3444 s->init_num = 4 + 2 + len + padding_len;
3448 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3452 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3455 #ifndef OPENSSL_NO_ENGINE
3456 if (s->ctx->client_cert_engine) {
3457 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3458 SSL_get_client_CA_list(s),
3459 px509, ppkey, NULL, NULL, NULL);
3464 if (s->ctx->client_cert_cb)
3465 i = s->ctx->client_cert_cb(s, px509, ppkey);
3469 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3471 int (*put_cb) (const SSL_CIPHER *,
3477 int empty_reneg_info_scsv = !s->renegotiate;
3478 /* Set disabled masks for this session */
3479 ssl_set_client_disabled(s);
3485 put_cb = s->method->put_cipher_by_char;
3487 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3488 c = sk_SSL_CIPHER_value(sk, i);
3489 /* Skip disabled ciphers */
3490 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3492 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3493 if (c->id == SSL3_CK_SCSV) {
3494 if (!empty_reneg_info_scsv)
3497 empty_reneg_info_scsv = 0;
3504 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3508 if (empty_reneg_info_scsv) {
3509 static SSL_CIPHER scsv = {
3510 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3512 j = put_cb(&scsv, p);
3514 #ifdef OPENSSL_RI_DEBUG
3516 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3519 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3520 static SSL_CIPHER scsv = {
3521 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3523 j = put_cb(&scsv, p);