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,
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++;
280 * Should have been reset by ssl3_get_finished, too.
282 s->s3->change_cipher_spec = 0;
285 case SSL3_ST_CW_CLNT_HELLO_A:
286 case SSL3_ST_CW_CLNT_HELLO_B:
289 ret = ssl3_client_hello(s);
292 s->state = SSL3_ST_CR_SRVR_HELLO_A;
295 /* turn on buffering for the next lot of output */
296 if (s->bbio != s->wbio)
297 s->wbio = BIO_push(s->bbio, s->wbio);
301 case SSL3_ST_CR_SRVR_HELLO_A:
302 case SSL3_ST_CR_SRVR_HELLO_B:
303 ret = ssl3_get_server_hello(s);
308 s->state = SSL3_ST_CR_CHANGE_A;
309 if (s->tlsext_ticket_expected) {
310 /* receive renewed session ticket */
311 s->state = SSL3_ST_CR_SESSION_TICKET_A;
314 s->state = SSL3_ST_CR_CERT_A;
318 case SSL3_ST_CR_CERT_A:
319 case SSL3_ST_CR_CERT_B:
320 /* Noop (ret = 0) for everything but EAP-FAST. */
321 ret = ssl3_check_change(s);
326 s->state = SSL3_ST_CR_CHANGE_A;
331 /* Check if it is anon DH/ECDH, SRP auth */
333 if (!(s->s3->tmp.new_cipher->algorithm_auth &
334 (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
335 ret = ssl3_get_server_certificate(s);
339 if (s->tlsext_status_expected)
340 s->state = SSL3_ST_CR_CERT_STATUS_A;
342 s->state = SSL3_ST_CR_KEY_EXCH_A;
345 s->state = SSL3_ST_CR_KEY_EXCH_A;
351 case SSL3_ST_CR_KEY_EXCH_A:
352 case SSL3_ST_CR_KEY_EXCH_B:
353 ret = ssl3_get_key_exchange(s);
356 s->state = SSL3_ST_CR_CERT_REQ_A;
360 * at this point we check that we have the required stuff from
363 if (!ssl3_check_cert_and_algorithm(s)) {
365 s->state = SSL_ST_ERR;
370 case SSL3_ST_CR_CERT_REQ_A:
371 case SSL3_ST_CR_CERT_REQ_B:
372 ret = ssl3_get_certificate_request(s);
375 s->state = SSL3_ST_CR_SRVR_DONE_A;
379 case SSL3_ST_CR_SRVR_DONE_A:
380 case SSL3_ST_CR_SRVR_DONE_B:
381 ret = ssl3_get_server_done(s);
384 #ifndef OPENSSL_NO_SRP
385 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
386 if ((ret = SRP_Calc_A_param(s)) <= 0) {
387 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC);
388 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
389 s->state = SSL_ST_ERR;
394 if (s->s3->tmp.cert_req)
395 s->state = SSL3_ST_CW_CERT_A;
397 s->state = SSL3_ST_CW_KEY_EXCH_A;
402 case SSL3_ST_CW_CERT_A:
403 case SSL3_ST_CW_CERT_B:
404 case SSL3_ST_CW_CERT_C:
405 case SSL3_ST_CW_CERT_D:
406 ret = ssl3_send_client_certificate(s);
409 s->state = SSL3_ST_CW_KEY_EXCH_A;
413 case SSL3_ST_CW_KEY_EXCH_A:
414 case SSL3_ST_CW_KEY_EXCH_B:
415 ret = ssl3_send_client_key_exchange(s);
419 * EAY EAY EAY need to check for DH fix cert sent back
422 * For TLS, cert_req is set to 2, so a cert chain of nothing is
423 * sent, but no verify packet is sent
426 * XXX: For now, we do not support client authentication in ECDH
427 * cipher suites with ECDH (rather than ECDSA) certificates. We
428 * need to skip the certificate verify message when client's
429 * ECDH public key is sent inside the client certificate.
431 if (s->s3->tmp.cert_req == 1) {
432 s->state = SSL3_ST_CW_CERT_VRFY_A;
434 s->state = SSL3_ST_CW_CHANGE_A;
436 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
437 s->state = SSL3_ST_CW_CHANGE_A;
443 case SSL3_ST_CW_CERT_VRFY_A:
444 case SSL3_ST_CW_CERT_VRFY_B:
445 ret = ssl3_send_client_verify(s);
448 s->state = SSL3_ST_CW_CHANGE_A;
452 case SSL3_ST_CW_CHANGE_A:
453 case SSL3_ST_CW_CHANGE_B:
454 ret = ssl3_send_change_cipher_spec(s,
456 SSL3_ST_CW_CHANGE_B);
460 #if defined(OPENSSL_NO_NEXTPROTONEG)
461 s->state = SSL3_ST_CW_FINISHED_A;
463 if (s->s3->next_proto_neg_seen)
464 s->state = SSL3_ST_CW_NEXT_PROTO_A;
466 s->state = SSL3_ST_CW_FINISHED_A;
470 s->session->cipher = s->s3->tmp.new_cipher;
471 #ifdef OPENSSL_NO_COMP
472 s->session->compress_meth = 0;
474 if (s->s3->tmp.new_compression == NULL)
475 s->session->compress_meth = 0;
477 s->session->compress_meth = s->s3->tmp.new_compression->id;
479 if (!s->method->ssl3_enc->setup_key_block(s)) {
481 s->state = SSL_ST_ERR;
485 if (!s->method->ssl3_enc->change_cipher_state(s,
486 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
489 s->state = SSL_ST_ERR;
495 #if !defined(OPENSSL_NO_NEXTPROTONEG)
496 case SSL3_ST_CW_NEXT_PROTO_A:
497 case SSL3_ST_CW_NEXT_PROTO_B:
498 ret = ssl3_send_next_proto(s);
501 s->state = SSL3_ST_CW_FINISHED_A;
505 case SSL3_ST_CW_FINISHED_A:
506 case SSL3_ST_CW_FINISHED_B:
507 ret = ssl3_send_finished(s,
508 SSL3_ST_CW_FINISHED_A,
509 SSL3_ST_CW_FINISHED_B,
511 ssl3_enc->client_finished_label,
513 ssl3_enc->client_finished_label_len);
516 s->state = SSL3_ST_CW_FLUSH;
519 s->s3->tmp.next_state = SSL_ST_OK;
522 * Allow NewSessionTicket if ticket expected
524 if (s->tlsext_ticket_expected)
525 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
527 s->s3->tmp.next_state = SSL3_ST_CR_CHANGE_A;
532 case SSL3_ST_CR_SESSION_TICKET_A:
533 case SSL3_ST_CR_SESSION_TICKET_B:
534 ret = ssl3_get_new_session_ticket(s);
537 s->state = SSL3_ST_CR_CHANGE_A;
541 case SSL3_ST_CR_CERT_STATUS_A:
542 case SSL3_ST_CR_CERT_STATUS_B:
543 ret = ssl3_get_cert_status(s);
546 s->state = SSL3_ST_CR_KEY_EXCH_A;
550 case SSL3_ST_CR_CHANGE_A:
551 case SSL3_ST_CR_CHANGE_B:
552 ret = ssl3_get_change_cipher_spec(s, SSL3_ST_CR_CHANGE_A,
553 SSL3_ST_CR_CHANGE_B);
557 s->state = SSL3_ST_CR_FINISHED_A;
561 case SSL3_ST_CR_FINISHED_A:
562 case SSL3_ST_CR_FINISHED_B:
563 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
564 SSL3_ST_CR_FINISHED_B);
569 s->state = SSL3_ST_CW_CHANGE_A;
571 s->state = SSL_ST_OK;
575 case SSL3_ST_CW_FLUSH:
576 s->rwstate = SSL_WRITING;
577 if (BIO_flush(s->wbio) <= 0) {
581 s->rwstate = SSL_NOTHING;
582 s->state = s->s3->tmp.next_state;
586 /* clean a few things up */
587 ssl3_cleanup_key_block(s);
588 BUF_MEM_free(s->init_buf);
591 /* remove the buffering */
592 ssl_free_wbio_buffer(s);
598 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
600 s->ctx->stats.sess_hit++;
604 s->handshake_func = ssl3_connect;
605 s->ctx->stats.sess_connect_good++;
608 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
615 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
621 /* did we do anything */
622 if (!s->s3->tmp.reuse_message && !skip) {
624 if ((ret = BIO_flush(s->wbio)) <= 0)
628 if ((cb != NULL) && (s->state != state)) {
629 new_state = s->state;
631 cb(s, SSL_CB_CONNECT_LOOP, 1);
632 s->state = new_state;
641 cb(s, SSL_CB_CONNECT_EXIT, ret);
646 * Work out what version we should be using for the initial ClientHello if
647 * the version is currently set to (D)TLS_ANY_VERSION.
648 * Returns 1 on success
651 static int ssl_set_version(SSL *s)
653 unsigned long mask, options = s->options;
655 if (s->method->version == TLS_ANY_VERSION) {
657 * SSL_OP_NO_X disables all protocols above X *if* there are
658 * some protocols below X enabled. This is required in order
659 * to maintain "version capability" vector contiguous. So
660 * that if application wants to disable TLS1.0 in favour of
661 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
662 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
664 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
665 #if !defined(OPENSSL_NO_SSL3)
669 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
670 if (options & SSL_OP_NO_TLSv1_2) {
671 if ((options & mask) != mask) {
672 s->version = TLS1_1_VERSION;
674 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
678 s->version = TLS1_2_VERSION;
681 if ((options & mask) == mask) {
682 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
685 s->version = TLS1_1_VERSION;
688 mask &= ~SSL_OP_NO_TLSv1_1;
689 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
690 s->version = TLS1_VERSION;
691 mask &= ~SSL_OP_NO_TLSv1;
692 #if !defined(OPENSSL_NO_SSL3)
693 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
694 s->version = SSL3_VERSION;
697 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
698 SSLerr(SSL_F_SSL_SET_VERSION,
699 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
703 if (s->version == SSL3_VERSION && FIPS_mode()) {
704 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
708 } else if (s->method->version == DTLS_ANY_VERSION) {
709 /* Determine which DTLS version to use */
710 /* If DTLS 1.2 disabled correct the version number */
711 if (options & SSL_OP_NO_DTLSv1_2) {
712 if (tls1_suiteb(s)) {
713 SSLerr(SSL_F_SSL_SET_VERSION,
714 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
718 * Disabling all versions is silly: return an error.
720 if (options & SSL_OP_NO_DTLSv1) {
721 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
725 * Update method so we don't use any DTLS 1.2 features.
727 s->method = DTLSv1_client_method();
728 s->version = DTLS1_VERSION;
731 * We only support one version: update method
733 if (options & SSL_OP_NO_DTLSv1)
734 s->method = DTLSv1_2_client_method();
735 s->version = DTLS1_2_VERSION;
739 s->client_version = s->version;
744 int ssl3_client_hello(SSL *s)
747 unsigned char *p, *d;
751 #ifndef OPENSSL_NO_COMP
756 buf = (unsigned char *)s->init_buf->data;
757 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
758 SSL_SESSION *sess = s->session;
760 /* Work out what SSL/TLS/DTLS version to use */
761 if (ssl_set_version(s) == 0)
764 if ((sess == NULL) || (sess->ssl_version != s->version) ||
766 * In the case of EAP-FAST, we can have a pre-shared
767 * "ticket" without a session ID.
769 (!sess->session_id_length && !sess->tlsext_tick) ||
770 (sess->not_resumable)) {
771 if (!ssl_get_new_session(s, 0))
774 /* else use the pre-loaded session */
776 p = s->s3->client_random;
779 * for DTLS if client_random is initialized, reuse it, we are
780 * required to use same upon reply to HelloVerify
782 if (SSL_IS_DTLS(s)) {
785 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
794 if (i && ssl_fill_hello_random(s, 0, p,
795 sizeof(s->s3->client_random)) <= 0)
798 /* Do the message type and length last */
799 d = p = ssl_handshake_start(s);
802 * version indicates the negotiated version: for example from
803 * an SSLv2/v3 compatible client hello). The client_version
804 * field is the maximum version we permit and it is also
805 * used in RSA encrypted premaster secrets. Some servers can
806 * choke if we initially report a higher version then
807 * renegotiate to a lower one in the premaster secret. This
808 * didn't happen with TLS 1.0 as most servers supported it
809 * but it can with TLS 1.1 or later if the server only supports
812 * Possible scenario with previous logic:
813 * 1. Client hello indicates TLS 1.2
814 * 2. Server hello says TLS 1.0
815 * 3. RSA encrypted premaster secret uses 1.2.
816 * 4. Handhaked proceeds using TLS 1.0.
817 * 5. Server sends hello request to renegotiate.
818 * 6. Client hello indicates TLS v1.0 as we now
819 * know that is maximum server supports.
820 * 7. Server chokes on RSA encrypted premaster secret
821 * containing version 1.0.
823 * For interoperability it should be OK to always use the
824 * maximum version we support in client hello and then rely
825 * on the checking of version to ensure the servers isn't
826 * being inconsistent: for example initially negotiating with
827 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
828 * client_version in client hello and not resetting it to
829 * the negotiated version.
831 *(p++) = s->client_version >> 8;
832 *(p++) = s->client_version & 0xff;
835 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
836 p += SSL3_RANDOM_SIZE;
842 i = s->session->session_id_length;
845 if (i > (int)sizeof(s->session->session_id)) {
846 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
849 memcpy(p, s->session->session_id, i);
853 /* cookie stuff for DTLS */
854 if (SSL_IS_DTLS(s)) {
855 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
856 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
859 *(p++) = s->d1->cookie_len;
860 memcpy(p, s->d1->cookie, s->d1->cookie_len);
861 p += s->d1->cookie_len;
864 /* Ciphers supported */
865 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
867 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
870 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
872 * Some servers hang if client hello > 256 bytes as hack workaround
873 * chop number of supported ciphers to keep it well below this if we
876 if (TLS1_get_version(s) >= TLS1_2_VERSION
877 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
878 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
884 #ifdef OPENSSL_NO_COMP
888 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
891 j = sk_SSL_COMP_num(s->ctx->comp_methods);
893 for (i = 0; i < j; i++) {
894 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
898 *(p++) = 0; /* Add the NULL method */
901 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
902 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
906 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
908 ssl3_send_alert(s, SSL3_AL_FATAL, al);
909 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
914 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
915 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
916 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
919 s->state = SSL3_ST_CW_CLNT_HELLO_B;
922 /* SSL3_ST_CW_CLNT_HELLO_B */
923 return ssl_do_write(s);
925 s->state = SSL_ST_ERR;
929 int ssl3_get_server_hello(SSL *s)
931 STACK_OF(SSL_CIPHER) *sk;
933 unsigned char *p, *d;
934 int i, al = SSL_AD_INTERNAL_ERROR, ok;
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 d = p = (unsigned char *)s->init_msg;
976 if (s->method->version == TLS_ANY_VERSION) {
977 int sversion = (p[0] << 8) | p[1];
979 #if TLS_MAX_VERSION != TLS1_2_VERSION
980 #error Code needs updating for new TLS version
982 #ifndef OPENSSL_NO_SSL3
983 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
985 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
986 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
987 al = SSL_AD_PROTOCOL_VERSION;
990 s->method = SSLv3_client_method();
993 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
994 s->method = TLSv1_client_method();
995 } else if ((sversion == TLS1_1_VERSION) &&
996 !(s->options & SSL_OP_NO_TLSv1_1)) {
997 s->method = TLSv1_1_client_method();
998 } else if ((sversion == TLS1_2_VERSION) &&
999 !(s->options & SSL_OP_NO_TLSv1_2)) {
1000 s->method = TLSv1_2_client_method();
1002 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
1003 al = SSL_AD_PROTOCOL_VERSION;
1006 s->session->ssl_version = s->version = s->method->version;
1008 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
1009 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
1010 al = SSL_AD_PROTOCOL_VERSION;
1013 } else if (s->method->version == DTLS_ANY_VERSION) {
1014 /* Work out correct protocol version to use */
1015 int hversion = (p[0] << 8) | p[1];
1016 int options = s->options;
1017 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
1018 s->method = DTLSv1_2_client_method();
1019 else if (tls1_suiteb(s)) {
1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1021 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1022 s->version = hversion;
1023 al = SSL_AD_PROTOCOL_VERSION;
1025 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
1026 s->method = DTLSv1_client_method();
1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1029 s->version = hversion;
1030 al = SSL_AD_PROTOCOL_VERSION;
1033 s->session->ssl_version = s->version = s->method->version;
1034 } else if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
1035 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1036 s->version = (s->version & 0xff00) | p[1];
1037 al = SSL_AD_PROTOCOL_VERSION;
1042 /* load the server hello data */
1043 /* load the server random */
1044 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
1045 p += SSL3_RANDOM_SIZE;
1049 /* get the session-id */
1052 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
1053 al = SSL_AD_ILLEGAL_PARAMETER;
1054 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1059 * Check if we can resume the session based on external pre-shared secret.
1060 * EAP-FAST (RFC 4851) supports two types of session resumption.
1061 * Resumption based on server-side state works with session IDs.
1062 * Resumption based on pre-shared Protected Access Credentials (PACs)
1063 * works by overriding the SessionTicket extension at the application
1064 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1065 * servers would honour the session ID.) Therefore, the session ID alone
1066 * is not a reliable indicator of session resumption, so we first check if
1067 * we can resume, and later peek at the next handshake message to see if the
1068 * server wants to resume.
1070 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1071 s->session->tlsext_tick) {
1072 SSL_CIPHER *pref_cipher = NULL;
1073 s->session->master_key_length = sizeof(s->session->master_key);
1074 if (s->tls_session_secret_cb(s, s->session->master_key,
1075 &s->session->master_key_length,
1077 s->tls_session_secret_cb_arg)) {
1078 s->session->cipher = pref_cipher ?
1079 pref_cipher : ssl_get_cipher_by_char(s, p + j);
1081 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1082 al = SSL_AD_INTERNAL_ERROR;
1087 if (j != 0 && j == s->session->session_id_length
1088 && memcmp(p, s->session->session_id, j) == 0) {
1089 if (s->sid_ctx_length != s->session->sid_ctx_length
1090 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1091 /* actually a client application bug */
1092 al = SSL_AD_ILLEGAL_PARAMETER;
1093 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1094 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1100 * If we were trying for session-id reuse but the server
1101 * didn't echo the ID, make a new SSL_SESSION.
1102 * In the case of EAP-FAST and PAC, we do not send a session ID,
1103 * so the PAC-based session secret is always preserved. It'll be
1104 * overwritten if the server refuses resumption.
1106 if (s->session->session_id_length > 0) {
1107 if (!ssl_get_new_session(s, 0)) {
1111 s->session->session_id_length = j;
1112 memcpy(s->session->session_id, p, j); /* j could be 0 */
1115 c = ssl_get_cipher_by_char(s, p);
1117 /* unknown cipher */
1118 al = SSL_AD_ILLEGAL_PARAMETER;
1119 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1122 /* Set version disabled mask now we know version */
1123 if (!SSL_USE_TLS1_2_CIPHERS(s))
1124 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1126 s->s3->tmp.mask_ssl = 0;
1128 * If it is a disabled cipher we didn't send it in client hello, so
1131 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1132 al = SSL_AD_ILLEGAL_PARAMETER;
1133 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1136 p += ssl_put_cipher_by_char(s, NULL, NULL);
1138 sk = ssl_get_ciphers_by_id(s);
1139 i = sk_SSL_CIPHER_find(sk, c);
1141 /* we did not say we would use this cipher */
1142 al = SSL_AD_ILLEGAL_PARAMETER;
1143 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1148 * Depending on the session caching (internal/external), the cipher
1149 * and/or cipher_id values may not be set. Make sure that cipher_id is
1150 * set and use it for comparison.
1152 if (s->session->cipher)
1153 s->session->cipher_id = s->session->cipher->id;
1154 if (s->hit && (s->session->cipher_id != c->id)) {
1155 al = SSL_AD_ILLEGAL_PARAMETER;
1156 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1157 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1160 s->s3->tmp.new_cipher = c;
1162 * Don't digest cached records if no sigalgs: we may need them for client
1165 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
1167 /* lets get the compression algorithm */
1169 #ifdef OPENSSL_NO_COMP
1171 al = SSL_AD_ILLEGAL_PARAMETER;
1172 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1173 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1177 * If compression is disabled we'd better not try to resume a session
1178 * using compression.
1180 if (s->session->compress_meth != 0) {
1181 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1186 if (s->hit && j != s->session->compress_meth) {
1187 al = SSL_AD_ILLEGAL_PARAMETER;
1188 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1189 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1194 else if (!ssl_allow_compression(s)) {
1195 al = SSL_AD_ILLEGAL_PARAMETER;
1196 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1199 comp = ssl3_comp_find(s->ctx->comp_methods, j);
1201 if ((j != 0) && (comp == NULL)) {
1202 al = SSL_AD_ILLEGAL_PARAMETER;
1203 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1204 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1207 s->s3->tmp.new_compression = comp;
1211 /* TLS extensions */
1212 if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) {
1213 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1218 /* wrong packet length */
1219 al = SSL_AD_DECODE_ERROR;
1220 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1226 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1228 s->state = SSL_ST_ERR;
1232 int ssl3_get_server_certificate(SSL *s)
1234 int al, i, ok, ret = -1, exp_idx;
1235 unsigned long n, nc, llen, l;
1237 const unsigned char *q, *p;
1239 STACK_OF(X509) *sk = NULL;
1240 EVP_PKEY *pkey = NULL;
1242 n = s->method->ssl_get_message(s,
1245 -1, s->max_cert_list, &ok);
1250 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1251 s->s3->tmp.reuse_message = 1;
1255 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1256 al = SSL_AD_UNEXPECTED_MESSAGE;
1257 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
1260 p = d = (unsigned char *)s->init_msg;
1262 if ((sk = sk_X509_new_null()) == NULL) {
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1268 if (llen + 3 != n) {
1269 al = SSL_AD_DECODE_ERROR;
1270 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1273 for (nc = 0; nc < llen;) {
1275 if ((l + nc + 3) > llen) {
1276 al = SSL_AD_DECODE_ERROR;
1277 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1278 SSL_R_CERT_LENGTH_MISMATCH);
1283 x = d2i_X509(NULL, &q, l);
1285 al = SSL_AD_BAD_CERTIFICATE;
1286 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1290 al = SSL_AD_DECODE_ERROR;
1291 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1292 SSL_R_CERT_LENGTH_MISMATCH);
1295 if (!sk_X509_push(sk, x)) {
1296 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1304 i = ssl_verify_cert_chain(s, sk);
1305 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1306 al = ssl_verify_alarm_type(s->verify_result);
1307 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1308 SSL_R_CERTIFICATE_VERIFY_FAILED);
1311 ERR_clear_error(); /* but we keep s->verify_result */
1313 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1314 al = SSL_AD_HANDSHAKE_FAILURE;
1318 s->session->peer_chain = sk;
1320 * Inconsistency alert: cert_chain does include the peer's certificate,
1321 * which we don't include in s3_srvr.c
1323 x = sk_X509_value(sk, 0);
1326 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1329 pkey = X509_get_pubkey(x);
1331 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1334 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1335 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1339 i = ssl_cert_type(x, pkey);
1343 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1344 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1348 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1349 if (exp_idx >= 0 && i != exp_idx) {
1351 al = SSL_AD_ILLEGAL_PARAMETER;
1352 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1353 SSL_R_WRONG_CERTIFICATE_TYPE);
1356 s->session->peer_type = i;
1358 X509_free(s->session->peer);
1359 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1360 s->session->peer = x;
1361 s->session->verify_result = s->verify_result;
1368 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1370 s->state = SSL_ST_ERR;
1372 EVP_PKEY_free(pkey);
1374 sk_X509_pop_free(sk, X509_free);
1378 int ssl3_get_key_exchange(SSL *s)
1380 #ifndef OPENSSL_NO_RSA
1381 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1384 unsigned char *param, *p;
1386 long i, param_len, n, alg_k, alg_a;
1387 EVP_PKEY *pkey = NULL;
1388 const EVP_MD *md = NULL;
1389 #ifndef OPENSSL_NO_RSA
1392 #ifndef OPENSSL_NO_DH
1395 #ifndef OPENSSL_NO_EC
1396 EC_KEY *ecdh = NULL;
1397 BN_CTX *bn_ctx = NULL;
1398 EC_POINT *srvr_ecpoint = NULL;
1400 int encoded_pt_len = 0;
1403 EVP_MD_CTX_init(&md_ctx);
1406 * use same message size as in ssl3_get_certificate_request() as
1407 * ServerKeyExchange message may be skipped
1409 n = s->method->ssl_get_message(s,
1410 SSL3_ST_CR_KEY_EXCH_A,
1411 SSL3_ST_CR_KEY_EXCH_B,
1412 -1, s->max_cert_list, &ok);
1416 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1418 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1420 * Can't skip server key exchange if this is an ephemeral
1423 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) {
1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1425 al = SSL_AD_UNEXPECTED_MESSAGE;
1429 s->s3->tmp.reuse_message = 1;
1433 param = p = (unsigned char *)s->init_msg;
1435 #ifndef OPENSSL_NO_RSA
1436 RSA_free(s->s3->peer_rsa_tmp);
1437 s->s3->peer_rsa_tmp = NULL;
1439 #ifndef OPENSSL_NO_DH
1440 DH_free(s->s3->peer_dh_tmp);
1441 s->s3->peer_dh_tmp = NULL;
1443 #ifndef OPENSSL_NO_EC
1444 EC_KEY_free(s->s3->peer_ecdh_tmp);
1445 s->s3->peer_ecdh_tmp = NULL;
1448 /* Total length of the parameters including the length prefix */
1451 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1453 al = SSL_AD_DECODE_ERROR;
1455 #ifndef OPENSSL_NO_PSK
1456 /* PSK ciphersuites are preceded by an identity hint */
1457 if (alg_k & SSL_PSK) {
1460 if (param_len > n) {
1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1467 * Store PSK identity hint for later use, hint is used in
1468 * ssl3_send_client_key_exchange. Assume that the maximum length of
1469 * a PSK identity hint can be as long as the maximum length of a PSK
1472 if (i > PSK_MAX_IDENTITY_LEN) {
1473 al = SSL_AD_HANDSHAKE_FAILURE;
1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1477 if (i > n - param_len) {
1478 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1479 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1484 OPENSSL_free(s->session->psk_identity_hint);
1486 s->session->psk_identity_hint = BUF_strndup((char *)p, i);
1487 if (s->session->psk_identity_hint == NULL) {
1488 al = SSL_AD_HANDSHAKE_FAILURE;
1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1493 s->session->psk_identity_hint = NULL;
1500 /* Nothing else to do for plain PSK or RSAPSK */
1501 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1503 #endif /* !OPENSSL_NO_PSK */
1504 #ifndef OPENSSL_NO_SRP
1505 if (alg_k & SSL_kSRP) {
1507 if (param_len > n) {
1508 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1513 if (i > n - param_len) {
1514 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH);
1519 if ((s->srp_ctx.N = BN_bin2bn(p, i, NULL)) == NULL) {
1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1525 if (2 > n - param_len) {
1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1533 if (i > n - param_len) {
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH);
1539 if ((s->srp_ctx.g = BN_bin2bn(p, i, NULL)) == NULL) {
1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1545 if (1 > n - param_len) {
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1551 i = (unsigned int)(p[0]);
1554 if (i > n - param_len) {
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH);
1560 if ((s->srp_ctx.s = BN_bin2bn(p, i, NULL)) == NULL) {
1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1566 if (2 > n - param_len) {
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1574 if (i > n - param_len) {
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH);
1580 if ((s->srp_ctx.B = BN_bin2bn(p, i, NULL)) == NULL) {
1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1587 if (!srp_verify_server_param(s, &al)) {
1588 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1592 /* We must check if there is a certificate */
1593 if (alg_a & (SSL_aRSA|SSL_aDSS))
1594 pkey = X509_get_pubkey(s->session->peer);
1596 #endif /* !OPENSSL_NO_SRP */
1597 #ifndef OPENSSL_NO_RSA
1598 if (alg_k & SSL_kRSA) {
1599 /* Temporary RSA keys only allowed in export ciphersuites */
1600 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1601 al = SSL_AD_UNEXPECTED_MESSAGE;
1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1605 if ((rsa = RSA_new()) == NULL) {
1606 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1611 if (param_len > n) {
1612 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1617 if (i > n - param_len) {
1618 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH);
1623 if ((rsa->n = BN_bin2bn(p, i, rsa->n)) == NULL) {
1624 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1629 if (2 > n - param_len) {
1630 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1637 if (i > n - param_len) {
1638 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH);
1643 if ((rsa->e = BN_bin2bn(p, i, rsa->e)) == NULL) {
1644 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1650 /* this should be because we are using an export cipher */
1651 if (alg_a & SSL_aRSA)
1652 pkey = X509_get_pubkey(s->session->peer);
1654 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1658 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
1659 al = SSL_AD_UNEXPECTED_MESSAGE;
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1664 s->s3->peer_rsa_tmp = rsa;
1667 #else /* OPENSSL_NO_RSA */
1670 #ifndef OPENSSL_NO_DH
1671 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1672 if ((dh = DH_new()) == NULL) {
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1678 if (param_len > n) {
1679 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1684 if (i > n - param_len) {
1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH);
1690 if ((dh->p = BN_bin2bn(p, i, NULL)) == NULL) {
1691 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1696 if (2 > n - param_len) {
1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1704 if (i > n - param_len) {
1705 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH);
1710 if ((dh->g = BN_bin2bn(p, i, NULL)) == NULL) {
1711 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1716 if (2 > n - param_len) {
1717 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1724 if (i > n - param_len) {
1725 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1730 if ((dh->pub_key = BN_bin2bn(p, i, NULL)) == NULL) {
1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1737 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1738 al = SSL_AD_HANDSHAKE_FAILURE;
1739 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1742 if (alg_a & (SSL_aRSA|SSL_aDSS))
1743 pkey = X509_get_pubkey(s->session->peer);
1744 /* else anonymous DH, so no certificate or pkey. */
1746 s->s3->peer_dh_tmp = dh;
1749 #endif /* !OPENSSL_NO_DH */
1751 #ifndef OPENSSL_NO_EC
1752 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1754 const EC_GROUP *group;
1756 if ((ecdh = EC_KEY_new()) == NULL) {
1757 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1762 * Extract elliptic curve parameters and the server's ephemeral ECDH
1763 * public key. Keep accumulating lengths of various components in
1764 * param_len and make sure it never exceeds n.
1768 * XXX: For now we only support named (not generic) curves and the
1769 * ECParameters in this case is just three bytes. We also need one
1770 * byte for the length of the encoded point
1773 if (param_len > n) {
1774 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1778 * Check curve is one of our preferences, if not server has sent an
1779 * invalid curve. ECParameters is 3 bytes.
1781 if (!tls1_check_curve(s, p, 3)) {
1782 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1786 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) {
1787 al = SSL_AD_INTERNAL_ERROR;
1788 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1789 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1793 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1794 if (ngroup == NULL) {
1795 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1798 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1799 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1802 EC_GROUP_free(ngroup);
1804 group = EC_KEY_get0_group(ecdh);
1806 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1807 (EC_GROUP_get_degree(group) > 163)) {
1808 al = SSL_AD_EXPORT_RESTRICTION;
1809 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1810 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1816 /* Next, get the encoded ECPoint */
1817 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1818 ((bn_ctx = BN_CTX_new()) == NULL)) {
1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1823 encoded_pt_len = *p; /* length of encoded point */
1826 if ((encoded_pt_len > n - param_len) ||
1827 (EC_POINT_oct2point(group, srvr_ecpoint,
1828 p, encoded_pt_len, bn_ctx) == 0)) {
1829 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1832 param_len += encoded_pt_len;
1835 p += encoded_pt_len;
1838 * The ECC/TLS specification does not mention the use of DSA to sign
1839 * ECParameters in the server key exchange message. We do support RSA
1843 # ifndef OPENSSL_NO_RSA
1844 else if (alg_a & SSL_aRSA)
1845 pkey = X509_get_pubkey(s->session->peer);
1847 # ifndef OPENSSL_NO_EC
1848 else if (alg_a & SSL_aECDSA)
1849 pkey = X509_get_pubkey(s->session->peer);
1851 /* else anonymous ECDH, so no certificate or pkey. */
1852 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1853 s->s3->peer_ecdh_tmp = ecdh;
1855 BN_CTX_free(bn_ctx);
1857 EC_POINT_free(srvr_ecpoint);
1858 srvr_ecpoint = NULL;
1860 al = SSL_AD_UNEXPECTED_MESSAGE;
1861 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1864 #endif /* !OPENSSL_NO_EC */
1866 /* p points to the next byte, there are 'n' bytes left */
1868 /* if it was signed, check the signature */
1870 if (SSL_USE_SIGALGS(s)) {
1873 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1876 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1883 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1896 j = EVP_PKEY_size(pkey);
1899 * Check signature length. If n is 0 then signature is empty
1901 if ((i != n) || (n > j) || (n <= 0)) {
1902 /* wrong packet length */
1903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1906 #ifndef OPENSSL_NO_RSA
1907 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1913 for (num = 2; num > 0; num--) {
1914 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1915 EVP_DigestInit_ex(&md_ctx, (num == 2)
1916 ? s->ctx->md5 : s->ctx->sha1, NULL);
1917 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1919 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1921 EVP_DigestUpdate(&md_ctx, param, param_len);
1922 EVP_DigestFinal_ex(&md_ctx, q, &size);
1926 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa);
1928 al = SSL_AD_DECRYPT_ERROR;
1929 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1934 al = SSL_AD_DECRYPT_ERROR;
1935 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1941 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1942 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1944 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1946 EVP_VerifyUpdate(&md_ctx, param, param_len);
1947 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1949 al = SSL_AD_DECRYPT_ERROR;
1950 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1955 /* aNULL, aSRP or PSK do not need public keys */
1956 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1957 /* Might be wrong key type, check it */
1958 if (ssl3_check_cert_and_algorithm(s))
1959 /* Otherwise this shouldn't happen */
1960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1963 /* still data left over */
1965 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1969 EVP_PKEY_free(pkey);
1970 EVP_MD_CTX_cleanup(&md_ctx);
1973 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1975 EVP_PKEY_free(pkey);
1976 #ifndef OPENSSL_NO_RSA
1979 #ifndef OPENSSL_NO_DH
1982 #ifndef OPENSSL_NO_EC
1983 BN_CTX_free(bn_ctx);
1984 EC_POINT_free(srvr_ecpoint);
1987 EVP_MD_CTX_cleanup(&md_ctx);
1988 s->state = SSL_ST_ERR;
1992 int ssl3_get_certificate_request(SSL *s)
1995 unsigned long n, nc, l;
1996 unsigned int llen, ctype_num, i;
1997 X509_NAME *xn = NULL;
1998 const unsigned char *p, *q;
2000 STACK_OF(X509_NAME) *ca_sk = NULL;
2002 n = s->method->ssl_get_message(s,
2003 SSL3_ST_CR_CERT_REQ_A,
2004 SSL3_ST_CR_CERT_REQ_B,
2005 -1, s->max_cert_list, &ok);
2010 s->s3->tmp.cert_req = 0;
2012 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
2013 s->s3->tmp.reuse_message = 1;
2015 * If we get here we don't need any cached handshake records as we
2016 * wont be doing client auth.
2018 if (!ssl3_digest_cached_records(s, 0))
2023 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
2024 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2025 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
2029 /* TLS does not like anon-DH with client cert */
2030 if (s->version > SSL3_VERSION) {
2031 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
2032 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2033 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2034 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2039 p = d = (unsigned char *)s->init_msg;
2041 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
2042 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2046 /* get the certificate types */
2048 OPENSSL_free(s->cert->ctypes);
2049 s->cert->ctypes = NULL;
2050 if (ctype_num > SSL3_CT_NUMBER) {
2051 /* If we exceed static buffer copy all to cert structure */
2052 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2053 if (s->cert->ctypes == NULL) {
2054 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2057 memcpy(s->cert->ctypes, p, ctype_num);
2058 s->cert->ctype_num = (size_t)ctype_num;
2059 ctype_num = SSL3_CT_NUMBER;
2061 for (i = 0; i < ctype_num; i++)
2062 s->s3->tmp.ctype[i] = p[i];
2064 if (SSL_USE_SIGALGS(s)) {
2067 * Check we have enough room for signature algorithms and following
2070 if ((unsigned long)(p - d + llen + 2) > n) {
2071 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2072 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2073 SSL_R_DATA_LENGTH_TOO_LONG);
2076 /* Clear certificate digests and validity flags */
2077 for (i = 0; i < SSL_PKEY_NUM; i++) {
2078 s->s3->tmp.md[i] = NULL;
2079 s->s3->tmp.valid_flags[i] = 0;
2081 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) {
2082 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2083 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2084 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2087 if (!tls1_process_sigalgs(s)) {
2088 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2089 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2095 /* get the CA RDNs */
2098 if ((unsigned long)(p - d + llen) != n) {
2099 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2100 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2104 for (nc = 0; nc < llen;) {
2106 if ((l + nc + 2) > llen) {
2107 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2108 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG);
2114 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
2115 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2116 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2121 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2122 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2123 SSL_R_CA_DN_LENGTH_MISMATCH);
2126 if (!sk_X509_NAME_push(ca_sk, xn)) {
2127 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2135 /* we should setup a certificate to return.... */
2136 s->s3->tmp.cert_req = 1;
2137 s->s3->tmp.ctype_num = ctype_num;
2138 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2139 s->s3->tmp.ca_names = ca_sk;
2145 s->state = SSL_ST_ERR;
2147 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2151 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
2153 return (X509_NAME_cmp(*a, *b));
2156 int ssl3_get_new_session_ticket(SSL *s)
2158 int ok, al, ret = 0, ticklen;
2160 const unsigned char *p;
2163 n = s->method->ssl_get_message(s,
2164 SSL3_ST_CR_SESSION_TICKET_A,
2165 SSL3_ST_CR_SESSION_TICKET_B,
2166 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
2172 /* need at least ticket_lifetime_hint + ticket length */
2173 al = SSL_AD_DECODE_ERROR;
2174 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2178 p = d = (unsigned char *)s->init_msg;
2180 if (s->session->session_id_length > 0) {
2181 int i = s->session_ctx->session_cache_mode;
2182 SSL_SESSION *new_sess;
2184 * We reused an existing session, so we need to replace it with a new
2187 if (i & SSL_SESS_CACHE_CLIENT) {
2189 * Remove the old session from the cache
2191 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
2192 if (s->session_ctx->remove_session_cb != NULL)
2193 s->session_ctx->remove_session_cb(s->session_ctx,
2196 /* We carry on if this fails */
2197 SSL_CTX_remove_session(s->session_ctx, s->session);
2201 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
2202 al = SSL_AD_INTERNAL_ERROR;
2203 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2207 SSL_SESSION_free(s->session);
2208 s->session = new_sess;
2211 n2l(p, s->session->tlsext_tick_lifetime_hint);
2213 /* ticket_lifetime_hint + ticket_length + ticket */
2214 if (ticklen + 6 != n) {
2215 al = SSL_AD_DECODE_ERROR;
2216 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2219 OPENSSL_free(s->session->tlsext_tick);
2220 s->session->tlsext_ticklen = 0;
2221 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2222 if (!s->session->tlsext_tick) {
2223 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2226 memcpy(s->session->tlsext_tick, p, ticklen);
2227 s->session->tlsext_ticklen = ticklen;
2229 * There are two ways to detect a resumed ticket session. One is to set
2230 * an appropriate session ID and then the server must return a match in
2231 * ServerHello. This allows the normal client session ID matching to work
2232 * and we know much earlier that the ticket has been accepted. The
2233 * other way is to set zero length session ID when the ticket is
2234 * presented and rely on the handshake to determine session resumption.
2235 * We choose the former approach because this fits in with assumptions
2236 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2237 * SHA256 is disabled) hash of the ticket.
2239 EVP_Digest(p, ticklen,
2240 s->session->session_id, &s->session->session_id_length,
2241 EVP_sha256(), NULL);
2245 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2247 s->state = SSL_ST_ERR;
2251 int ssl3_get_cert_status(SSL *s)
2254 unsigned long resplen, n;
2255 const unsigned char *p;
2257 n = s->method->ssl_get_message(s,
2258 SSL3_ST_CR_CERT_STATUS_A,
2259 SSL3_ST_CR_CERT_STATUS_B,
2260 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
2265 /* need at least status type + length */
2266 al = SSL_AD_DECODE_ERROR;
2267 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2270 p = (unsigned char *)s->init_msg;
2271 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
2272 al = SSL_AD_DECODE_ERROR;
2273 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2277 if (resplen + 4 != n) {
2278 al = SSL_AD_DECODE_ERROR;
2279 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2282 OPENSSL_free(s->tlsext_ocsp_resp);
2283 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2284 if (!s->tlsext_ocsp_resp) {
2285 al = SSL_AD_INTERNAL_ERROR;
2286 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2289 s->tlsext_ocsp_resplen = resplen;
2290 if (s->ctx->tlsext_status_cb) {
2292 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2294 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2295 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2299 al = SSL_AD_INTERNAL_ERROR;
2300 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2306 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2307 s->state = SSL_ST_ERR;
2311 int ssl3_get_server_done(SSL *s)
2316 /* Second to last param should be very small, like 0 :-) */
2317 n = s->method->ssl_get_message(s,
2318 SSL3_ST_CR_SRVR_DONE_A,
2319 SSL3_ST_CR_SRVR_DONE_B,
2320 SSL3_MT_SERVER_DONE, 30, &ok);
2325 /* should contain no data */
2326 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2327 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2328 s->state = SSL_ST_ERR;
2335 int ssl3_send_client_key_exchange(SSL *s)
2339 #ifndef OPENSSL_NO_PSK
2340 size_t pskhdrlen = 0;
2342 unsigned long alg_k;
2343 #ifndef OPENSSL_NO_RSA
2345 EVP_PKEY *pkey = NULL;
2347 #ifndef OPENSSL_NO_EC
2348 EC_KEY *clnt_ecdh = NULL;
2349 const EC_POINT *srvr_ecpoint = NULL;
2350 EVP_PKEY *srvr_pub_pkey = NULL;
2351 unsigned char *encodedPoint = NULL;
2352 int encoded_pt_len = 0;
2353 BN_CTX *bn_ctx = NULL;
2355 unsigned char *pms = NULL;
2357 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2359 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
2360 p = ssl_handshake_start(s);
2363 #ifndef OPENSSL_NO_PSK
2364 if (alg_k & SSL_PSK) {
2367 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2368 * \0-terminated identity. The last byte is for us for simulating
2371 char identity[PSK_MAX_IDENTITY_LEN + 1];
2373 unsigned char psk[PSK_MAX_PSK_LEN];
2376 if (s->psk_client_callback == NULL) {
2377 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2378 SSL_R_PSK_NO_CLIENT_CB);
2382 memset(identity, 0, sizeof(identity));
2384 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2385 identity, sizeof(identity) - 1,
2388 if (psklen > PSK_MAX_PSK_LEN) {
2389 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2390 ERR_R_INTERNAL_ERROR);
2392 } else if (psklen == 0) {
2393 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2394 SSL_R_PSK_IDENTITY_NOT_FOUND);
2398 OPENSSL_free(s->s3->tmp.psk);
2399 s->s3->tmp.psk = BUF_memdup(psk, psklen);
2400 OPENSSL_cleanse(psk, psklen);
2402 if (s->s3->tmp.psk == NULL) {
2403 OPENSSL_cleanse(identity, sizeof(identity));
2407 s->s3->tmp.psklen = psklen;
2409 identitylen = strlen(identity);
2410 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2411 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2412 ERR_R_INTERNAL_ERROR);
2415 OPENSSL_free(s->session->psk_identity);
2416 s->session->psk_identity = BUF_strdup(identity);
2417 if (s->session->psk_identity == NULL) {
2418 OPENSSL_cleanse(identity, sizeof(identity));
2422 s2n(identitylen, p);
2423 memcpy(p, identity, identitylen);
2424 pskhdrlen = 2 + identitylen;
2428 OPENSSL_cleanse(identity, sizeof(identity));
2430 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2434 if (alg_k & SSL_kPSK) {
2439 /* Fool emacs indentation */
2442 #ifndef OPENSSL_NO_RSA
2443 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2445 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2446 pms = OPENSSL_malloc(pmslen);
2450 if (s->session->peer == NULL) {
2452 * We should always have a server certificate with SSL_kRSA.
2454 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2455 ERR_R_INTERNAL_ERROR);
2459 if (s->s3->peer_rsa_tmp != NULL)
2460 rsa = s->s3->peer_rsa_tmp;
2462 pkey = X509_get_pubkey(s->session->peer);
2463 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2464 || (pkey->pkey.rsa == NULL)) {
2465 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2466 ERR_R_INTERNAL_ERROR);
2469 rsa = pkey->pkey.rsa;
2470 EVP_PKEY_free(pkey);
2473 pms[0] = s->client_version >> 8;
2474 pms[1] = s->client_version & 0xff;
2475 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2479 /* Fix buf for TLS and beyond */
2480 if (s->version > SSL3_VERSION)
2482 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2484 if (s->options & SSL_OP_PKCS1_CHECK_1)
2486 if (s->options & SSL_OP_PKCS1_CHECK_2)
2490 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2491 SSL_R_BAD_RSA_ENCRYPT);
2495 /* Fix buf for TLS and beyond */
2496 if (s->version > SSL3_VERSION) {
2502 #ifndef OPENSSL_NO_DH
2503 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
2504 DH *dh_srvr, *dh_clnt;
2505 if (s->s3->peer_dh_tmp != NULL)
2506 dh_srvr = s->s3->peer_dh_tmp;
2508 /* we get them from the cert */
2509 EVP_PKEY *spkey = NULL;
2511 spkey = X509_get_pubkey(s->session->peer);
2513 dh_srvr = EVP_PKEY_get1_DH(spkey);
2514 EVP_PKEY_free(spkey);
2516 if (dh_srvr == NULL) {
2517 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2518 ERR_R_INTERNAL_ERROR);
2522 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2523 /* Use client certificate key */
2524 EVP_PKEY *clkey = s->cert->key->privatekey;
2527 dh_clnt = EVP_PKEY_get1_DH(clkey);
2528 if (dh_clnt == NULL) {
2529 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2530 ERR_R_INTERNAL_ERROR);
2534 /* generate a new random key */
2535 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2536 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2539 if (!DH_generate_key(dh_clnt)) {
2540 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2546 pmslen = DH_size(dh_clnt);
2547 pms = OPENSSL_malloc(pmslen);
2552 * use the 'p' output buffer for the DH key, but make sure to
2553 * clear it out afterwards
2556 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
2557 if (s->s3->peer_dh_tmp == NULL)
2561 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2567 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2570 /* send off the data */
2571 n = BN_num_bytes(dh_clnt->pub_key);
2573 BN_bn2bin(dh_clnt->pub_key, p);
2581 #ifndef OPENSSL_NO_EC
2582 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
2583 const EC_GROUP *srvr_group = NULL;
2585 int ecdh_clnt_cert = 0;
2588 * Did we send out the client's ECDH share for use in premaster
2589 * computation as part of client certificate? If so, set
2590 * ecdh_clnt_cert to 1.
2592 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
2594 * XXX: For now, we do not support client
2595 * authentication using ECDH certificates.
2596 * To add such support, one needs to add
2597 * code that checks for appropriate
2598 * conditions and sets ecdh_clnt_cert to 1.
2599 * For example, the cert have an ECC
2600 * key on the same curve as the server's
2601 * and the key should be authorized for
2604 * One also needs to add code in ssl3_connect
2605 * to skip sending the certificate verify
2608 * if ((s->cert->key->privatekey != NULL) &&
2609 * (s->cert->key->privatekey->type ==
2610 * EVP_PKEY_EC) && ...)
2611 * ecdh_clnt_cert = 1;
2615 if (s->s3->peer_ecdh_tmp != NULL) {
2616 tkey = s->s3->peer_ecdh_tmp;
2618 /* Get the Server Public Key from Cert */
2619 srvr_pub_pkey = X509_get_pubkey(s->session->peer);
2620 if ((srvr_pub_pkey == NULL)
2621 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2622 || (srvr_pub_pkey->pkey.ec == NULL)) {
2623 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2624 ERR_R_INTERNAL_ERROR);
2628 tkey = srvr_pub_pkey->pkey.ec;
2631 srvr_group = EC_KEY_get0_group(tkey);
2632 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2634 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2635 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2636 ERR_R_INTERNAL_ERROR);
2640 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2641 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2642 ERR_R_MALLOC_FAILURE);
2646 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2647 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2650 if (ecdh_clnt_cert) {
2652 * Reuse key info from our certificate We only need our
2653 * private key to perform the ECDH computation.
2655 const BIGNUM *priv_key;
2656 tkey = s->cert->key->privatekey->pkey.ec;
2657 priv_key = EC_KEY_get0_private_key(tkey);
2658 if (priv_key == NULL) {
2659 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2660 ERR_R_MALLOC_FAILURE);
2663 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2664 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2668 /* Generate a new ECDH key pair */
2669 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2670 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2677 * use the 'p' output buffer for the ECDH key, but make sure to
2678 * clear it out afterwards
2681 field_size = EC_GROUP_get_degree(srvr_group);
2682 if (field_size <= 0) {
2683 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2686 pmslen = (field_size + 7) / 8;
2687 pms = OPENSSL_malloc(pmslen);
2690 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2691 if (n <= 0 || pmslen != (size_t)n) {
2692 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2696 if (ecdh_clnt_cert) {
2697 /* Send empty client key exch message */
2701 * First check the size of encoding and allocate memory
2705 EC_POINT_point2oct(srvr_group,
2706 EC_KEY_get0_public_key(clnt_ecdh),
2707 POINT_CONVERSION_UNCOMPRESSED,
2710 encodedPoint = (unsigned char *)
2711 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2712 bn_ctx = BN_CTX_new();
2713 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2714 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2715 ERR_R_MALLOC_FAILURE);
2719 /* Encode the public key */
2720 n = EC_POINT_point2oct(srvr_group,
2721 EC_KEY_get0_public_key(clnt_ecdh),
2722 POINT_CONVERSION_UNCOMPRESSED,
2723 encodedPoint, encoded_pt_len, bn_ctx);
2725 *p = n; /* length of encoded point */
2726 /* Encoded point will be copied here */
2728 /* copy the point */
2729 memcpy(p, encodedPoint, n);
2730 /* increment n to account for length field */
2734 /* Free allocated memory */
2735 BN_CTX_free(bn_ctx);
2736 OPENSSL_free(encodedPoint);
2737 EC_KEY_free(clnt_ecdh);
2738 EVP_PKEY_free(srvr_pub_pkey);
2740 #endif /* !OPENSSL_NO_EC */
2741 else if (alg_k & SSL_kGOST) {
2742 /* GOST key exchange message creation */
2743 EVP_PKEY_CTX *pkey_ctx;
2746 unsigned int md_len;
2747 unsigned char shared_ukm[32], tmp[256];
2748 EVP_MD_CTX *ukm_hash;
2752 pms = OPENSSL_malloc(pmslen);
2757 * Get server sertificate PKEY and create ctx from it
2759 peer_cert = s->session->peer;
2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2762 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2766 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2767 X509_get_pubkey(peer_cert), NULL);
2769 * If we have send a certificate, and certificate key
2771 * * parameters match those of server certificate, use
2772 * certificate key for key exchange
2775 /* Otherwise, generate ephemeral key pair */
2777 EVP_PKEY_encrypt_init(pkey_ctx);
2778 /* Generate session key */
2779 if (RAND_bytes(pms, pmslen) <= 0) {
2780 EVP_PKEY_CTX_free(pkey_ctx);
2781 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2782 ERR_R_INTERNAL_ERROR);
2786 * If we have client certificate, use its secret as peer key
2788 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2789 if (EVP_PKEY_derive_set_peer
2790 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2792 * If there was an error - just ignore it. Ephemeral key
2799 * Compute shared IV and store it in algorithm-specific context
2802 ukm_hash = EVP_MD_CTX_create();
2803 EVP_DigestInit(ukm_hash,
2804 EVP_get_digestbynid(NID_id_GostR3411_94));
2805 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2807 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2809 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2810 EVP_MD_CTX_destroy(ukm_hash);
2811 if (EVP_PKEY_CTX_ctrl
2812 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2814 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2818 /* Make GOST keytransport blob message */
2820 * Encapsulate it into sequence
2822 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2824 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
2825 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2829 if (msglen >= 0x80) {
2831 *(p++) = msglen & 0xff;
2834 *(p++) = msglen & 0xff;
2837 memcpy(p, tmp, msglen);
2838 /* Check if pubkey from client certificate was used */
2839 if (EVP_PKEY_CTX_ctrl
2840 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2841 /* Set flag "skip certificate verify" */
2842 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2844 EVP_PKEY_CTX_free(pkey_ctx);
2845 EVP_PKEY_free(pub_key);
2848 #ifndef OPENSSL_NO_SRP
2849 else if (alg_k & SSL_kSRP) {
2850 if (s->srp_ctx.A != NULL) {
2851 /* send off the data */
2852 n = BN_num_bytes(s->srp_ctx.A);
2854 BN_bn2bin(s->srp_ctx.A, p);
2857 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2858 ERR_R_INTERNAL_ERROR);
2861 OPENSSL_free(s->session->srp_username);
2862 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2863 if (s->session->srp_username == NULL) {
2864 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2865 ERR_R_MALLOC_FAILURE);
2871 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2876 #ifndef OPENSSL_NO_PSK
2880 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2881 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2882 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2886 s->state = SSL3_ST_CW_KEY_EXCH_B;
2889 /* SSL3_ST_CW_KEY_EXCH_B */
2890 n = ssl_do_write(s);
2891 #ifndef OPENSSL_NO_SRP
2893 if (alg_k & SSL_kSRP) {
2895 * If everything written generate master key: no need to save PMS as
2896 * srp_generate_client_master_secret generates it internally.
2899 if (!srp_generate_client_master_secret(s)) {
2900 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2901 ERR_R_INTERNAL_ERROR);
2907 /* If we haven't written everything save PMS */
2909 s->s3->tmp.pms = pms;
2910 s->s3->tmp.pmslen = pmslen;
2912 /* If we don't have a PMS restore */
2914 pms = s->s3->tmp.pms;
2915 pmslen = s->s3->tmp.pmslen;
2917 if (pms == NULL && !(alg_k & SSL_kPSK)) {
2918 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2919 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2922 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2923 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2924 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2930 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2931 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2933 OPENSSL_clear_free(pms, pmslen);
2934 s->s3->tmp.pms = NULL;
2935 #ifndef OPENSSL_NO_EC
2936 BN_CTX_free(bn_ctx);
2937 OPENSSL_free(encodedPoint);
2938 EC_KEY_free(clnt_ecdh);
2939 EVP_PKEY_free(srvr_pub_pkey);
2941 #ifndef OPENSSL_NO_PSK
2942 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2943 s->s3->tmp.psk = NULL;
2945 s->state = SSL_ST_ERR;
2949 int ssl3_send_client_verify(SSL *s)
2952 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2954 EVP_PKEY_CTX *pctx = NULL;
2960 EVP_MD_CTX_init(&mctx);
2962 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2963 p = ssl_handshake_start(s);
2964 pkey = s->cert->key->privatekey;
2965 /* Create context from key and test if sha1 is allowed as digest */
2966 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2967 EVP_PKEY_sign_init(pctx);
2968 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2969 if (!SSL_USE_SIGALGS(s))
2970 s->method->ssl3_enc->cert_verify_mac(s,
2973 [MD5_DIGEST_LENGTH]));
2978 * For TLS v1.2 send signature algorithm and signature using agreed
2979 * digest and cached handshake records.
2981 if (SSL_USE_SIGALGS(s)) {
2984 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2985 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2986 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
2987 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2992 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2995 if (!EVP_SignInit_ex(&mctx, md, NULL)
2996 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2997 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
2998 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB);
3003 /* Digest cached records and discard handshake buffer */
3004 if (!ssl3_digest_cached_records(s, 0))
3007 #ifndef OPENSSL_NO_RSA
3008 if (pkey->type == EVP_PKEY_RSA) {
3009 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
3010 if (RSA_sign(NID_md5_sha1, data,
3011 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
3012 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
3013 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
3020 #ifndef OPENSSL_NO_DSA
3021 if (pkey->type == EVP_PKEY_DSA) {
3022 if (!DSA_sign(pkey->save_type,
3023 &(data[MD5_DIGEST_LENGTH]),
3024 SHA_DIGEST_LENGTH, &(p[2]),
3025 (unsigned int *)&j, pkey->pkey.dsa)) {
3026 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
3033 #ifndef OPENSSL_NO_EC
3034 if (pkey->type == EVP_PKEY_EC) {
3035 if (!ECDSA_sign(pkey->save_type,
3036 &(data[MD5_DIGEST_LENGTH]),
3037 SHA_DIGEST_LENGTH, &(p[2]),
3038 (unsigned int *)&j, pkey->pkey.ec)) {
3039 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
3046 if (pkey->type == NID_id_GostR3410_94
3047 || pkey->type == NID_id_GostR3410_2001) {
3048 unsigned char signbuf[64];
3050 size_t sigsize = 64;
3051 s->method->ssl3_enc->cert_verify_mac(s,
3052 NID_id_GostR3411_94, data);
3053 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3054 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3057 for (i = 63, j = 0; i >= 0; j++, i--) {
3058 p[2 + j] = signbuf[i];
3063 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3066 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
3067 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3070 s->state = SSL3_ST_CW_CERT_VRFY_B;
3072 EVP_MD_CTX_cleanup(&mctx);
3073 EVP_PKEY_CTX_free(pctx);
3074 return ssl_do_write(s);
3076 EVP_MD_CTX_cleanup(&mctx);
3077 EVP_PKEY_CTX_free(pctx);
3078 s->state = SSL_ST_ERR;
3083 * Check a certificate can be used for client authentication. Currently check
3084 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
3085 * certificates can be used and optionally checks suitability for Suite B.
3087 static int ssl3_check_client_certificate(SSL *s)
3089 unsigned long alg_k;
3090 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3092 /* If no suitable signature algorithm can't use certificate */
3093 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
3096 * If strict mode check suitability of chain before using it. This also
3097 * adjusts suite B digest if necessary.
3099 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3100 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3102 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3103 /* See if we can use client certificate for fixed DH */
3104 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3105 int i = s->session->peer_type;
3106 EVP_PKEY *clkey = NULL, *spkey = NULL;
3107 clkey = s->cert->key->privatekey;
3108 /* If client key not DH assume it can be used */
3109 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3112 spkey = X509_get_pubkey(s->session->peer);
3114 /* Compare server and client parameters */
3115 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3116 EVP_PKEY_free(spkey);
3120 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3125 int ssl3_send_client_certificate(SSL *s)
3128 EVP_PKEY *pkey = NULL;
3131 if (s->state == SSL3_ST_CW_CERT_A) {
3132 /* Let cert callback update client certificates if required */
3133 if (s->cert->cert_cb) {
3134 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3136 s->rwstate = SSL_X509_LOOKUP;
3140 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3141 s->state = SSL_ST_ERR;
3144 s->rwstate = SSL_NOTHING;
3146 if (ssl3_check_client_certificate(s))
3147 s->state = SSL3_ST_CW_CERT_C;
3149 s->state = SSL3_ST_CW_CERT_B;
3152 /* We need to get a client cert */
3153 if (s->state == SSL3_ST_CW_CERT_B) {
3155 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3156 * return(-1); We then get retied later
3159 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3161 s->rwstate = SSL_X509_LOOKUP;
3164 s->rwstate = SSL_NOTHING;
3165 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3166 s->state = SSL3_ST_CW_CERT_B;
3167 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3169 } else if (i == 1) {
3171 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
3172 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3176 EVP_PKEY_free(pkey);
3177 if (i && !ssl3_check_client_certificate(s))
3180 if (s->version == SSL3_VERSION) {
3181 s->s3->tmp.cert_req = 0;
3182 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3185 s->s3->tmp.cert_req = 2;
3186 if (!ssl3_digest_cached_records(s, 0)) {
3187 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3188 s->state = SSL_ST_ERR;
3194 /* Ok, we have a cert */
3195 s->state = SSL3_ST_CW_CERT_C;
3198 if (s->state == SSL3_ST_CW_CERT_C) {
3199 s->state = SSL3_ST_CW_CERT_D;
3200 if (!ssl3_output_cert_chain(s,
3201 (s->s3->tmp.cert_req ==
3202 2) ? NULL : s->cert->key)) {
3203 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3204 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3205 s->state = SSL_ST_ERR;
3209 /* SSL3_ST_CW_CERT_D */
3210 return ssl_do_write(s);
3213 #define has_bits(i,m) (((i)&(m)) == (m))
3215 int ssl3_check_cert_and_algorithm(SSL *s)
3219 EVP_PKEY *pkey = NULL;
3221 #ifndef OPENSSL_NO_RSA
3224 #ifndef OPENSSL_NO_DH
3227 int al = SSL_AD_HANDSHAKE_FAILURE;
3229 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3230 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
3232 /* we don't have a certificate */
3233 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
3235 #ifndef OPENSSL_NO_RSA
3236 rsa = s->s3->peer_rsa_tmp;
3238 #ifndef OPENSSL_NO_DH
3239 dh = s->s3->peer_dh_tmp;
3242 /* This is the passed certificate */
3244 idx = s->session->peer_type;
3245 #ifndef OPENSSL_NO_EC
3246 if (idx == SSL_PKEY_ECC) {
3247 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
3249 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3254 } else if (alg_a & SSL_aECDSA) {
3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3256 SSL_R_MISSING_ECDSA_SIGNING_CERT);
3258 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
3263 pkey = X509_get_pubkey(s->session->peer);
3264 pkey_bits = EVP_PKEY_bits(pkey);
3265 i = X509_certificate_type(s->session->peer, pkey);
3266 EVP_PKEY_free(pkey);
3268 /* Check that we have a certificate if we require one */
3269 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3270 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3271 SSL_R_MISSING_RSA_SIGNING_CERT);
3274 #ifndef OPENSSL_NO_DSA
3275 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3276 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3277 SSL_R_MISSING_DSA_SIGNING_CERT);
3281 #ifndef OPENSSL_NO_RSA
3282 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
3283 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3284 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3285 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3286 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3288 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
3289 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3290 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3291 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3292 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3296 /* server key exchange is not allowed. */
3297 al = SSL_AD_INTERNAL_ERROR;
3298 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3305 #ifndef OPENSSL_NO_DH
3306 if ((alg_k & SSL_kDHE) && (dh == NULL)) {
3307 al = SSL_AD_INTERNAL_ERROR;
3308 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3310 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3311 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3312 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3313 SSL_R_MISSING_DH_RSA_CERT);
3316 # ifndef OPENSSL_NO_DSA
3317 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3318 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3319 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3320 SSL_R_MISSING_DH_DSA_CERT);
3326 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3327 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3328 #ifndef OPENSSL_NO_RSA
3329 if (alg_k & SSL_kRSA) {
3331 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3332 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3334 } else if (RSA_bits(rsa) >
3335 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3336 /* We have a temporary RSA key but it's too large. */
3337 al = SSL_AD_EXPORT_RESTRICTION;
3338 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3339 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3344 #ifndef OPENSSL_NO_DH
3345 if (alg_k & SSL_kDHE) {
3347 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3348 /* We have a temporary DH key but it's too large. */
3349 al = SSL_AD_EXPORT_RESTRICTION;
3350 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3351 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3354 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3355 /* The cert should have had an export DH key. */
3356 al = SSL_AD_EXPORT_RESTRICTION;
3357 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3358 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3363 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3364 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3370 ssl3_send_alert(s, SSL3_AL_FATAL, al);
3375 * Normally, we can tell if the server is resuming the session from
3376 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server
3377 * message after the ServerHello to determine if the server is resuming.
3378 * Therefore, we allow EAP-FAST to peek ahead.
3379 * ssl3_check_change returns 1 if we are resuming from an external
3380 * pre-shared secret, we have a "ticket" and the next server message
3381 * is CCS; and 0 otherwise. It returns -1 upon an error.
3383 static int ssl3_check_change(SSL *s)
3387 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb ||
3388 !s->session->tlsext_tick)
3392 * This function is called when we might get a Certificate message instead,
3393 * so permit appropriate message length.
3394 * We ignore the return value as we're only interested in the message type
3395 * and not its length.
3397 s->method->ssl_get_message(s,
3400 -1, s->max_cert_list, &ok);
3405 s->s3->tmp.reuse_message = 1;
3407 if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC)
3413 #ifndef OPENSSL_NO_NEXTPROTONEG
3414 int ssl3_send_next_proto(SSL *s)
3416 unsigned int len, padding_len;
3419 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3420 len = s->next_proto_negotiated_len;
3421 padding_len = 32 - ((len + 2) % 32);
3422 d = (unsigned char *)s->init_buf->data;
3424 memcpy(d + 5, s->next_proto_negotiated, len);
3425 d[5 + len] = padding_len;
3426 memset(d + 6 + len, 0, padding_len);
3427 *(d++) = SSL3_MT_NEXT_PROTO;
3428 l2n3(2 + len + padding_len, d);
3429 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3430 s->init_num = 4 + 2 + len + padding_len;
3434 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3438 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3441 #ifndef OPENSSL_NO_ENGINE
3442 if (s->ctx->client_cert_engine) {
3443 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3444 SSL_get_client_CA_list(s),
3445 px509, ppkey, NULL, NULL, NULL);
3450 if (s->ctx->client_cert_cb)
3451 i = s->ctx->client_cert_cb(s, px509, ppkey);
3455 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3457 int (*put_cb) (const SSL_CIPHER *,
3463 int empty_reneg_info_scsv = !s->renegotiate;
3464 /* Set disabled masks for this session */
3465 ssl_set_client_disabled(s);
3471 put_cb = s->method->put_cipher_by_char;
3473 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3474 c = sk_SSL_CIPHER_value(sk, i);
3475 /* Skip disabled ciphers */
3476 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3478 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3479 if (c->id == SSL3_CK_SCSV) {
3480 if (!empty_reneg_info_scsv)
3483 empty_reneg_info_scsv = 0;
3490 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3494 if (empty_reneg_info_scsv) {
3495 static SSL_CIPHER scsv = {
3496 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3498 j = put_cb(&scsv, p);
3500 #ifdef OPENSSL_RI_DEBUG
3502 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3505 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3506 static SSL_CIPHER scsv = {
3507 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3509 j = put_cb(&scsv, p);