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 ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
172 * Work out what version we should be using for the initial ClientHello if
173 * the version is currently set to (D)TLS_ANY_VERSION.
174 * Returns 1 on success
177 static int ssl_set_version(SSL *s)
179 unsigned long mask, options = s->options;
181 if (s->method->version == TLS_ANY_VERSION) {
183 * SSL_OP_NO_X disables all protocols above X *if* there are
184 * some protocols below X enabled. This is required in order
185 * to maintain "version capability" vector contiguous. So
186 * that if application wants to disable TLS1.0 in favour of
187 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
188 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
190 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
191 #if !defined(OPENSSL_NO_SSL3)
195 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
196 if (options & SSL_OP_NO_TLSv1_2) {
197 if ((options & mask) != mask) {
198 s->version = TLS1_1_VERSION;
200 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
204 s->version = TLS1_2_VERSION;
207 if ((options & mask) == mask) {
208 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
211 s->version = TLS1_1_VERSION;
214 mask &= ~SSL_OP_NO_TLSv1_1;
215 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
216 s->version = TLS1_VERSION;
217 mask &= ~SSL_OP_NO_TLSv1;
218 #if !defined(OPENSSL_NO_SSL3)
219 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
220 s->version = SSL3_VERSION;
223 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
224 SSLerr(SSL_F_SSL_SET_VERSION,
225 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
229 if (s->version == SSL3_VERSION && FIPS_mode()) {
230 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
234 } else if (s->method->version == DTLS_ANY_VERSION) {
235 /* Determine which DTLS version to use */
236 /* If DTLS 1.2 disabled correct the version number */
237 if (options & SSL_OP_NO_DTLSv1_2) {
238 if (tls1_suiteb(s)) {
239 SSLerr(SSL_F_SSL_SET_VERSION,
240 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
244 * Disabling all versions is silly: return an error.
246 if (options & SSL_OP_NO_DTLSv1) {
247 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
251 * Update method so we don't use any DTLS 1.2 features.
253 s->method = DTLSv1_client_method();
254 s->version = DTLS1_VERSION;
257 * We only support one version: update method
259 if (options & SSL_OP_NO_DTLSv1)
260 s->method = DTLSv1_2_client_method();
261 s->version = DTLS1_2_VERSION;
265 s->client_version = s->version;
270 int ssl3_client_hello(SSL *s)
272 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
273 if(tls_construct_client_hello(s) == 0)
276 s->state = SSL3_ST_CW_CLNT_HELLO_B;
279 /* SSL3_ST_CW_CLNT_HELLO_B */
280 return ssl_do_write(s);
282 s->state = SSL_ST_ERR;
287 int tls_construct_client_hello(SSL *s)
290 unsigned char *p, *d;
294 #ifndef OPENSSL_NO_COMP
298 SSL_SESSION *sess = s->session;
300 buf = (unsigned char *)s->init_buf->data;
302 /* Work out what SSL/TLS/DTLS version to use */
303 if (ssl_set_version(s) == 0)
306 if ((sess == NULL) || (sess->ssl_version != s->version) ||
308 * In the case of EAP-FAST, we can have a pre-shared
309 * "ticket" without a session ID.
311 (!sess->session_id_length && !sess->tlsext_tick) ||
312 (sess->not_resumable)) {
313 if (!ssl_get_new_session(s, 0))
316 /* else use the pre-loaded session */
318 p = s->s3->client_random;
321 * for DTLS if client_random is initialized, reuse it, we are
322 * required to use same upon reply to HelloVerify
324 if (SSL_IS_DTLS(s)) {
327 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
336 if (i && ssl_fill_hello_random(s, 0, p,
337 sizeof(s->s3->client_random)) <= 0)
340 /* Do the message type and length last */
341 d = p = ssl_handshake_start(s);
344 * version indicates the negotiated version: for example from
345 * an SSLv2/v3 compatible client hello). The client_version
346 * field is the maximum version we permit and it is also
347 * used in RSA encrypted premaster secrets. Some servers can
348 * choke if we initially report a higher version then
349 * renegotiate to a lower one in the premaster secret. This
350 * didn't happen with TLS 1.0 as most servers supported it
351 * but it can with TLS 1.1 or later if the server only supports
354 * Possible scenario with previous logic:
355 * 1. Client hello indicates TLS 1.2
356 * 2. Server hello says TLS 1.0
357 * 3. RSA encrypted premaster secret uses 1.2.
358 * 4. Handhaked proceeds using TLS 1.0.
359 * 5. Server sends hello request to renegotiate.
360 * 6. Client hello indicates TLS v1.0 as we now
361 * know that is maximum server supports.
362 * 7. Server chokes on RSA encrypted premaster secret
363 * containing version 1.0.
365 * For interoperability it should be OK to always use the
366 * maximum version we support in client hello and then rely
367 * on the checking of version to ensure the servers isn't
368 * being inconsistent: for example initially negotiating with
369 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
370 * client_version in client hello and not resetting it to
371 * the negotiated version.
373 *(p++) = s->client_version >> 8;
374 *(p++) = s->client_version & 0xff;
377 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
378 p += SSL3_RANDOM_SIZE;
384 i = s->session->session_id_length;
387 if (i > (int)sizeof(s->session->session_id)) {
388 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
391 memcpy(p, s->session->session_id, i);
395 /* cookie stuff for DTLS */
396 if (SSL_IS_DTLS(s)) {
397 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
398 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
401 *(p++) = s->d1->cookie_len;
402 memcpy(p, s->d1->cookie, s->d1->cookie_len);
403 p += s->d1->cookie_len;
406 /* Ciphers supported */
407 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
409 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
412 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
414 * Some servers hang if client hello > 256 bytes as hack workaround
415 * chop number of supported ciphers to keep it well below this if we
418 if (TLS1_get_version(s) >= TLS1_2_VERSION
419 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
420 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
426 #ifdef OPENSSL_NO_COMP
430 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
433 j = sk_SSL_COMP_num(s->ctx->comp_methods);
435 for (i = 0; i < j; i++) {
436 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
440 *(p++) = 0; /* Add the NULL method */
443 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
444 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
448 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
450 ssl3_send_alert(s, SSL3_AL_FATAL, al);
451 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
456 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
457 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
458 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
469 int ssl3_get_server_hello(SSL *s)
474 * Hello verify request and/or server hello version may not match so set
475 * first packet if we're negotiating version.
479 n = s->method->ssl_get_message(s,
480 SSL3_ST_CR_SRVR_HELLO_A,
481 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
487 if (SSL_IS_DTLS(s)) {
488 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
489 if (s->d1->send_cookie == 0) {
490 s->s3->tmp.reuse_message = 1;
492 } else { /* already sent a cookie */
494 al = SSL_AD_UNEXPECTED_MESSAGE;
495 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
501 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
502 al = SSL_AD_UNEXPECTED_MESSAGE;
503 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
507 return tls_process_server_hello(s, (unsigned long)n);
509 ssl3_send_alert(s, SSL3_AL_FATAL, al);
510 s->state = SSL_ST_ERR;
515 enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, unsigned long n)
517 STACK_OF(SSL_CIPHER) *sk;
519 PACKET pkt, session_id;
520 size_t session_id_len;
521 unsigned char *cipherchars;
522 int i, al = SSL_AD_INTERNAL_ERROR;
523 unsigned int compression;
524 #ifndef OPENSSL_NO_COMP
528 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
529 al = SSL_AD_INTERNAL_ERROR;
530 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
534 if (s->method->version == TLS_ANY_VERSION) {
535 unsigned int sversion;
537 if (!PACKET_get_net_2(&pkt, &sversion)) {
538 al = SSL_AD_DECODE_ERROR;
539 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
543 #if TLS_MAX_VERSION != TLS1_2_VERSION
544 #error Code needs updating for new TLS version
546 #ifndef OPENSSL_NO_SSL3
547 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
549 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
550 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
551 al = SSL_AD_PROTOCOL_VERSION;
554 s->method = SSLv3_client_method();
557 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
558 s->method = TLSv1_client_method();
559 } else if ((sversion == TLS1_1_VERSION) &&
560 !(s->options & SSL_OP_NO_TLSv1_1)) {
561 s->method = TLSv1_1_client_method();
562 } else if ((sversion == TLS1_2_VERSION) &&
563 !(s->options & SSL_OP_NO_TLSv1_2)) {
564 s->method = TLSv1_2_client_method();
566 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
567 al = SSL_AD_PROTOCOL_VERSION;
570 s->session->ssl_version = s->version = s->method->version;
572 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
573 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
574 al = SSL_AD_PROTOCOL_VERSION;
577 } else if (s->method->version == DTLS_ANY_VERSION) {
578 /* Work out correct protocol version to use */
579 unsigned int hversion;
582 if (!PACKET_get_net_2(&pkt, &hversion)) {
583 al = SSL_AD_DECODE_ERROR;
584 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
588 options = s->options;
589 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
590 s->method = DTLSv1_2_client_method();
591 else if (tls1_suiteb(s)) {
592 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
593 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
594 s->version = hversion;
595 al = SSL_AD_PROTOCOL_VERSION;
597 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
598 s->method = DTLSv1_client_method();
600 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
601 s->version = hversion;
602 al = SSL_AD_PROTOCOL_VERSION;
605 s->session->ssl_version = s->version = s->method->version;
609 if (!PACKET_get_bytes(&pkt, &vers, 2)) {
610 al = SSL_AD_DECODE_ERROR;
611 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
614 if ((vers[0] != (s->version >> 8))
615 || (vers[1] != (s->version & 0xff))) {
616 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
617 s->version = (s->version & 0xff00) | vers[1];
618 al = SSL_AD_PROTOCOL_VERSION;
623 /* load the server hello data */
624 /* load the server random */
625 if (!PACKET_copy_bytes(&pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
626 al = SSL_AD_DECODE_ERROR;
627 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
633 /* Get the session-id. */
634 if (!PACKET_get_length_prefixed_1(&pkt, &session_id)) {
635 al = SSL_AD_DECODE_ERROR;
636 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
639 session_id_len = PACKET_remaining(&session_id);
640 if (session_id_len > sizeof s->session->session_id
641 || session_id_len > SSL3_SESSION_ID_SIZE) {
642 al = SSL_AD_ILLEGAL_PARAMETER;
643 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
647 if (!PACKET_get_bytes(&pkt, &cipherchars, TLS_CIPHER_LEN)) {
648 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
649 al = SSL_AD_DECODE_ERROR;
654 * Check if we can resume the session based on external pre-shared secret.
655 * EAP-FAST (RFC 4851) supports two types of session resumption.
656 * Resumption based on server-side state works with session IDs.
657 * Resumption based on pre-shared Protected Access Credentials (PACs)
658 * works by overriding the SessionTicket extension at the application
659 * layer, and does not send a session ID. (We do not know whether EAP-FAST
660 * servers would honour the session ID.) Therefore, the session ID alone
661 * is not a reliable indicator of session resumption, so we first check if
662 * we can resume, and later peek at the next handshake message to see if the
663 * server wants to resume.
665 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
666 s->session->tlsext_tick) {
667 SSL_CIPHER *pref_cipher = NULL;
668 s->session->master_key_length = sizeof(s->session->master_key);
669 if (s->tls_session_secret_cb(s, s->session->master_key,
670 &s->session->master_key_length,
672 s->tls_session_secret_cb_arg)) {
673 s->session->cipher = pref_cipher ?
674 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
676 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
677 al = SSL_AD_INTERNAL_ERROR;
682 if (session_id_len != 0 && session_id_len == s->session->session_id_length
683 && memcmp(PACKET_data(&session_id), s->session->session_id,
684 session_id_len) == 0) {
685 if (s->sid_ctx_length != s->session->sid_ctx_length
686 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
687 /* actually a client application bug */
688 al = SSL_AD_ILLEGAL_PARAMETER;
689 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
690 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
696 * If we were trying for session-id reuse but the server
697 * didn't echo the ID, make a new SSL_SESSION.
698 * In the case of EAP-FAST and PAC, we do not send a session ID,
699 * so the PAC-based session secret is always preserved. It'll be
700 * overwritten if the server refuses resumption.
702 if (s->session->session_id_length > 0) {
703 if (!ssl_get_new_session(s, 0)) {
708 s->session->session_id_length = session_id_len;
709 /* session_id_len could be 0 */
710 memcpy(s->session->session_id, PACKET_data(&session_id),
714 c = ssl_get_cipher_by_char(s, cipherchars);
717 al = SSL_AD_ILLEGAL_PARAMETER;
718 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
721 /* Set version disabled mask now we know version */
722 if (!SSL_USE_TLS1_2_CIPHERS(s))
723 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
725 s->s3->tmp.mask_ssl = 0;
727 * If it is a disabled cipher we didn't send it in client hello, so
730 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
731 al = SSL_AD_ILLEGAL_PARAMETER;
732 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
736 sk = ssl_get_ciphers_by_id(s);
737 i = sk_SSL_CIPHER_find(sk, c);
739 /* we did not say we would use this cipher */
740 al = SSL_AD_ILLEGAL_PARAMETER;
741 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
746 * Depending on the session caching (internal/external), the cipher
747 * and/or cipher_id values may not be set. Make sure that cipher_id is
748 * set and use it for comparison.
750 if (s->session->cipher)
751 s->session->cipher_id = s->session->cipher->id;
752 if (s->hit && (s->session->cipher_id != c->id)) {
753 al = SSL_AD_ILLEGAL_PARAMETER;
754 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
755 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
758 s->s3->tmp.new_cipher = c;
760 * Don't digest cached records if no sigalgs: we may need them for client
763 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0))
765 /* lets get the compression algorithm */
767 if (!PACKET_get_1(&pkt, &compression)) {
768 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
769 al = SSL_AD_DECODE_ERROR;
772 #ifdef OPENSSL_NO_COMP
773 if (compression != 0) {
774 al = SSL_AD_ILLEGAL_PARAMETER;
775 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
776 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
780 * If compression is disabled we'd better not try to resume a session
783 if (s->session->compress_meth != 0) {
784 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
788 if (s->hit && compression != s->session->compress_meth) {
789 al = SSL_AD_ILLEGAL_PARAMETER;
790 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
791 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
794 if (compression == 0)
796 else if (!ssl_allow_compression(s)) {
797 al = SSL_AD_ILLEGAL_PARAMETER;
798 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
801 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
804 if (compression != 0 && comp == NULL) {
805 al = SSL_AD_ILLEGAL_PARAMETER;
806 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
807 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
810 s->s3->tmp.new_compression = comp;
815 if (!ssl_parse_serverhello_tlsext(s, &pkt)) {
816 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
820 if (PACKET_remaining(&pkt) != 0) {
821 /* wrong packet length */
822 al = SSL_AD_DECODE_ERROR;
823 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
827 #ifndef OPENSSL_NO_SCTP
828 if (SSL_IS_DTLS(s) && s->hit) {
829 unsigned char sctpauthkey[64];
830 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
833 * Add new shared key for SCTP-Auth, will be ignored if
836 snprintf((char *)labelbuffer,
837 sizeof(DTLS1_SCTP_AUTH_LABEL),
838 DTLS1_SCTP_AUTH_LABEL);
840 if (SSL_export_keying_material(s, sctpauthkey,
843 sizeof(labelbuffer), NULL, 0,
847 BIO_ctrl(SSL_get_wbio(s),
848 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
849 sizeof(sctpauthkey), sctpauthkey);
853 return MSG_PROCESS_CONTINUE_READING;
855 ssl3_send_alert(s, SSL3_AL_FATAL, al);
858 return MSG_PROCESS_ERROR;
861 int ssl3_get_server_certificate(SSL *s)
866 n = s->method->ssl_get_message(s,
869 -1, s->max_cert_list, &ok);
874 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
875 s->s3->tmp.reuse_message = 1;
879 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
880 al = SSL_AD_UNEXPECTED_MESSAGE;
881 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
885 return tls_process_server_certificate(s, (unsigned long)n);
887 ssl3_send_alert(s, SSL3_AL_FATAL, al);
888 s->state = SSL_ST_ERR;
892 enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, unsigned long n)
894 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
895 unsigned long cert_list_len, cert_len;
897 unsigned char *certstart, *certbytes;
898 STACK_OF(X509) *sk = NULL;
899 EVP_PKEY *pkey = NULL;
902 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
903 al = SSL_AD_INTERNAL_ERROR;
904 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
908 if ((sk = sk_X509_new_null()) == NULL) {
909 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
913 if (!PACKET_get_net_3(&pkt, &cert_list_len)
914 || PACKET_remaining(&pkt) != cert_list_len) {
915 al = SSL_AD_DECODE_ERROR;
916 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
919 while (PACKET_remaining(&pkt)) {
920 if (!PACKET_get_net_3(&pkt, &cert_len)
921 || !PACKET_get_bytes(&pkt, &certbytes, cert_len)) {
922 al = SSL_AD_DECODE_ERROR;
923 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
924 SSL_R_CERT_LENGTH_MISMATCH);
928 certstart = certbytes;
929 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
931 al = SSL_AD_BAD_CERTIFICATE;
932 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
935 if (certbytes != (certstart + cert_len)) {
936 al = SSL_AD_DECODE_ERROR;
937 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
938 SSL_R_CERT_LENGTH_MISMATCH);
941 if (!sk_X509_push(sk, x)) {
942 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
948 i = ssl_verify_cert_chain(s, sk);
949 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
950 al = ssl_verify_alarm_type(s->verify_result);
951 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
952 SSL_R_CERTIFICATE_VERIFY_FAILED);
955 ERR_clear_error(); /* but we keep s->verify_result */
957 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
958 al = SSL_AD_HANDSHAKE_FAILURE;
962 s->session->peer_chain = sk;
964 * Inconsistency alert: cert_chain does include the peer's certificate,
965 * which we don't include in s3_srvr.c
967 x = sk_X509_value(sk, 0);
970 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
973 pkey = X509_get_pubkey(x);
975 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
978 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
979 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
983 i = ssl_cert_type(x, pkey);
987 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
988 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
992 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
993 if (exp_idx >= 0 && i != exp_idx) {
995 al = SSL_AD_ILLEGAL_PARAMETER;
996 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
997 SSL_R_WRONG_CERTIFICATE_TYPE);
1000 s->session->peer_type = i;
1002 X509_free(s->session->peer);
1004 s->session->peer = x;
1005 s->session->verify_result = s->verify_result;
1008 ret = MSG_PROCESS_CONTINUE_READING;
1012 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1014 statem_set_error(s);
1016 EVP_PKEY_free(pkey);
1018 sk_X509_pop_free(sk, X509_free);
1022 int ssl3_get_key_exchange(SSL *s)
1029 * use same message size as in ssl3_get_certificate_request() as
1030 * ServerKeyExchange message may be skipped
1032 n = s->method->ssl_get_message(s,
1033 SSL3_ST_CR_KEY_EXCH_A,
1034 SSL3_ST_CR_KEY_EXCH_B,
1035 -1, s->max_cert_list, &ok);
1039 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1041 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1043 * Can't skip server key exchange if this is an ephemeral
1046 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) {
1047 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1048 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1052 s->s3->tmp.reuse_message = 1;
1056 return tls_process_key_exchange(s, (unsigned long)n);
1059 enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, unsigned long n)
1061 #ifndef OPENSSL_NO_RSA
1062 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1065 int al, j, verify_ret;
1067 EVP_PKEY *pkey = NULL;
1068 const EVP_MD *md = NULL;
1069 #ifndef OPENSSL_NO_RSA
1072 #ifndef OPENSSL_NO_DH
1075 #ifndef OPENSSL_NO_EC
1076 EC_KEY *ecdh = NULL;
1077 BN_CTX *bn_ctx = NULL;
1078 EC_POINT *srvr_ecpoint = NULL;
1081 PACKET pkt, save_param_start, signature;
1083 EVP_MD_CTX_init(&md_ctx);
1085 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1087 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1088 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1089 al = SSL_AD_INTERNAL_ERROR;
1092 save_param_start = pkt;
1094 #ifndef OPENSSL_NO_RSA
1095 RSA_free(s->s3->peer_rsa_tmp);
1096 s->s3->peer_rsa_tmp = NULL;
1098 #ifndef OPENSSL_NO_DH
1099 DH_free(s->s3->peer_dh_tmp);
1100 s->s3->peer_dh_tmp = NULL;
1102 #ifndef OPENSSL_NO_EC
1103 EC_KEY_free(s->s3->peer_ecdh_tmp);
1104 s->s3->peer_ecdh_tmp = NULL;
1107 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1109 al = SSL_AD_DECODE_ERROR;
1111 #ifndef OPENSSL_NO_PSK
1112 /* PSK ciphersuites are preceded by an identity hint */
1113 if (alg_k & SSL_PSK) {
1114 PACKET psk_identity_hint;
1115 if (!PACKET_get_length_prefixed_2(&pkt, &psk_identity_hint)) {
1116 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1121 * Store PSK identity hint for later use, hint is used in
1122 * ssl3_send_client_key_exchange. Assume that the maximum length of
1123 * a PSK identity hint can be as long as the maximum length of a PSK
1126 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1127 al = SSL_AD_HANDSHAKE_FAILURE;
1128 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1132 if (!PACKET_strndup(&psk_identity_hint,
1133 &s->session->psk_identity_hint)) {
1134 al = SSL_AD_INTERNAL_ERROR;
1139 /* Nothing else to do for plain PSK or RSAPSK */
1140 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1142 #endif /* !OPENSSL_NO_PSK */
1143 #ifndef OPENSSL_NO_SRP
1144 if (alg_k & SSL_kSRP) {
1145 PACKET prime, generator, salt, server_pub;
1146 if (!PACKET_get_length_prefixed_2(&pkt, &prime)
1147 || !PACKET_get_length_prefixed_2(&pkt, &generator)
1148 || !PACKET_get_length_prefixed_1(&pkt, &salt)
1149 || !PACKET_get_length_prefixed_2(&pkt, &server_pub)) {
1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1155 BN_bin2bn(PACKET_data(&prime),
1156 PACKET_remaining(&prime), NULL)) == NULL
1158 BN_bin2bn(PACKET_data(&generator),
1159 PACKET_remaining(&generator), NULL)) == NULL
1161 BN_bin2bn(PACKET_data(&salt),
1162 PACKET_remaining(&salt), NULL)) == NULL
1164 BN_bin2bn(PACKET_data(&server_pub),
1165 PACKET_remaining(&server_pub), NULL)) == NULL) {
1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1170 if (!srp_verify_server_param(s, &al)) {
1171 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1175 /* We must check if there is a certificate */
1176 if (alg_a & (SSL_aRSA|SSL_aDSS))
1177 pkey = X509_get_pubkey(s->session->peer);
1179 #endif /* !OPENSSL_NO_SRP */
1180 #ifndef OPENSSL_NO_RSA
1181 if (alg_k & SSL_kRSA) {
1183 /* Temporary RSA keys only allowed in export ciphersuites */
1184 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1185 al = SSL_AD_UNEXPECTED_MESSAGE;
1186 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1190 if (!PACKET_get_length_prefixed_2(&pkt, &mod)
1191 || !PACKET_get_length_prefixed_2(&pkt, &exp)) {
1192 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1196 if ((rsa = RSA_new()) == NULL) {
1197 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1201 if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod),
1203 || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp),
1205 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1209 /* this should be because we are using an export cipher */
1210 if (alg_a & SSL_aRSA)
1211 pkey = X509_get_pubkey(s->session->peer);
1213 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1217 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
1218 al = SSL_AD_UNEXPECTED_MESSAGE;
1219 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1223 s->s3->peer_rsa_tmp = rsa;
1226 #else /* OPENSSL_NO_RSA */
1229 #ifndef OPENSSL_NO_DH
1230 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1231 PACKET prime, generator, pub_key;
1233 if (!PACKET_get_length_prefixed_2(&pkt, &prime)
1234 || !PACKET_get_length_prefixed_2(&pkt, &generator)
1235 || !PACKET_get_length_prefixed_2(&pkt, &pub_key)) {
1236 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1240 if ((dh = DH_new()) == NULL) {
1241 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1245 if ((dh->p = BN_bin2bn(PACKET_data(&prime),
1246 PACKET_remaining(&prime), NULL)) == NULL
1247 || (dh->g = BN_bin2bn(PACKET_data(&generator),
1248 PACKET_remaining(&generator), NULL)) == NULL
1250 BN_bin2bn(PACKET_data(&pub_key),
1251 PACKET_remaining(&pub_key), NULL)) == NULL) {
1252 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1256 if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
1257 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
1261 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1262 al = SSL_AD_HANDSHAKE_FAILURE;
1263 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1266 if (alg_a & (SSL_aRSA|SSL_aDSS))
1267 pkey = X509_get_pubkey(s->session->peer);
1268 /* else anonymous DH, so no certificate or pkey. */
1270 s->s3->peer_dh_tmp = dh;
1273 #endif /* !OPENSSL_NO_DH */
1275 #ifndef OPENSSL_NO_EC
1276 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1278 const EC_GROUP *group;
1280 unsigned char *ecparams;
1282 if ((ecdh = EC_KEY_new()) == NULL) {
1283 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1288 * Extract elliptic curve parameters and the server's ephemeral ECDH
1289 * public key. For now we only support named (not generic) curves and
1290 * ECParameters in this case is just three bytes.
1292 if (!PACKET_get_bytes(&pkt, &ecparams, 3)) {
1293 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1297 * Check curve is one of our preferences, if not server has sent an
1298 * invalid curve. ECParameters is 3 bytes.
1300 if (!tls1_check_curve(s, ecparams, 3)) {
1301 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1305 if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) {
1306 al = SSL_AD_INTERNAL_ERROR;
1307 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1308 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1312 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1313 if (ngroup == NULL) {
1314 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
1317 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1318 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
1321 EC_GROUP_free(ngroup);
1323 group = EC_KEY_get0_group(ecdh);
1325 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1326 (EC_GROUP_get_degree(group) > 163)) {
1327 al = SSL_AD_EXPORT_RESTRICTION;
1328 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1329 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1333 /* Next, get the encoded ECPoint */
1334 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1335 ((bn_ctx = BN_CTX_new()) == NULL)) {
1336 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1340 if (!PACKET_get_length_prefixed_1(&pkt, &encoded_pt)) {
1341 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1345 if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt),
1346 PACKET_remaining(&encoded_pt), bn_ctx) == 0) {
1347 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1352 * The ECC/TLS specification does not mention the use of DSA to sign
1353 * ECParameters in the server key exchange message. We do support RSA
1357 # ifndef OPENSSL_NO_RSA
1358 else if (alg_a & SSL_aRSA)
1359 pkey = X509_get_pubkey(s->session->peer);
1361 # ifndef OPENSSL_NO_EC
1362 else if (alg_a & SSL_aECDSA)
1363 pkey = X509_get_pubkey(s->session->peer);
1365 /* else anonymous ECDH, so no certificate or pkey. */
1366 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1367 s->s3->peer_ecdh_tmp = ecdh;
1369 BN_CTX_free(bn_ctx);
1371 EC_POINT_free(srvr_ecpoint);
1372 srvr_ecpoint = NULL;
1374 al = SSL_AD_UNEXPECTED_MESSAGE;
1375 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1378 #endif /* !OPENSSL_NO_EC */
1380 /* if it was signed, check the signature */
1384 * |pkt| now points to the beginning of the signature, so the difference
1385 * equals the length of the parameters.
1387 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1388 PACKET_remaining(&save_param_start) -
1389 PACKET_remaining(&pkt))) {
1390 al = SSL_AD_INTERNAL_ERROR;
1391 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1395 if (SSL_USE_SIGALGS(s)) {
1396 unsigned char *sigalgs;
1398 if (!PACKET_get_bytes(&pkt, &sigalgs, 2)) {
1399 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1402 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1409 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1415 if (!PACKET_get_length_prefixed_2(&pkt, &signature)
1416 || PACKET_remaining(&pkt) != 0) {
1417 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1420 j = EVP_PKEY_size(pkey);
1422 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1427 * Check signature length
1429 if (PACKET_remaining(&signature) > (size_t)j) {
1430 /* wrong packet length */
1431 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1434 #ifndef OPENSSL_NO_RSA
1435 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1441 for (num = 2; num > 0; num--) {
1442 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1443 EVP_DigestInit_ex(&md_ctx, (num == 2)
1444 ? s->ctx->md5 : s->ctx->sha1, NULL);
1445 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1447 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1449 EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms),
1450 PACKET_remaining(¶ms));
1451 EVP_DigestFinal_ex(&md_ctx, q, &size);
1456 RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature),
1457 PACKET_remaining(&signature), pkey->pkey.rsa);
1458 if (verify_ret < 0) {
1459 al = SSL_AD_DECRYPT_ERROR;
1460 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1463 if (verify_ret == 0) {
1465 al = SSL_AD_DECRYPT_ERROR;
1466 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1472 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1473 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1475 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1477 EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms),
1478 PACKET_remaining(¶ms));
1479 if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature),
1480 PACKET_remaining(&signature), pkey) <= 0) {
1482 al = SSL_AD_DECRYPT_ERROR;
1483 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1488 /* aNULL, aSRP or PSK do not need public keys */
1489 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1490 /* Might be wrong key type, check it */
1491 if (ssl3_check_cert_and_algorithm(s))
1492 /* Otherwise this shouldn't happen */
1493 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1496 /* still data left over */
1497 if (PACKET_remaining(&pkt) != 0) {
1498 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1502 EVP_PKEY_free(pkey);
1503 EVP_MD_CTX_cleanup(&md_ctx);
1504 return MSG_PROCESS_CONTINUE_READING;
1506 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1508 EVP_PKEY_free(pkey);
1509 #ifndef OPENSSL_NO_RSA
1512 #ifndef OPENSSL_NO_DH
1515 #ifndef OPENSSL_NO_EC
1516 BN_CTX_free(bn_ctx);
1517 EC_POINT_free(srvr_ecpoint);
1520 EVP_MD_CTX_cleanup(&md_ctx);
1521 statem_set_error(s);
1522 return MSG_PROCESS_ERROR;
1525 int ssl3_get_certificate_request(SSL *s)
1530 n = s->method->ssl_get_message(s,
1531 SSL3_ST_CR_CERT_REQ_A,
1532 SSL3_ST_CR_CERT_REQ_B,
1533 -1, s->max_cert_list, &ok);
1538 s->s3->tmp.cert_req = 0;
1540 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1541 s->s3->tmp.reuse_message = 1;
1543 * If we get here we don't need any cached handshake records as we
1544 * wont be doing client auth.
1546 if (!ssl3_digest_cached_records(s, 0))
1551 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1552 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1553 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
1557 /* TLS does not like anon-DH with client cert */
1558 if (s->version > SSL3_VERSION) {
1559 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
1560 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1561 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1562 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1567 return tls_process_certificate_request(s, (unsigned long)n);
1569 s->state = SSL_ST_ERR;
1574 enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, unsigned long n)
1576 int ret = MSG_PROCESS_ERROR;
1577 unsigned int list_len, ctype_num, i, name_len;
1578 X509_NAME *xn = NULL;
1579 unsigned char *data;
1580 unsigned char *namestart, *namebytes;
1581 STACK_OF(X509_NAME) *ca_sk = NULL;
1584 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1585 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1586 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR);
1590 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1591 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1595 /* get the certificate types */
1596 if (!PACKET_get_1(&pkt, &ctype_num)
1597 || !PACKET_get_bytes(&pkt, &data, ctype_num)) {
1598 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1599 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1602 OPENSSL_free(s->cert->ctypes);
1603 s->cert->ctypes = NULL;
1604 if (ctype_num > SSL3_CT_NUMBER) {
1605 /* If we exceed static buffer copy all to cert structure */
1606 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1607 if (s->cert->ctypes == NULL) {
1608 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1611 memcpy(s->cert->ctypes, data, ctype_num);
1612 s->cert->ctype_num = (size_t)ctype_num;
1613 ctype_num = SSL3_CT_NUMBER;
1615 for (i = 0; i < ctype_num; i++)
1616 s->s3->tmp.ctype[i] = data[i];
1618 if (SSL_USE_SIGALGS(s)) {
1619 if (!PACKET_get_net_2(&pkt, &list_len)
1620 || !PACKET_get_bytes(&pkt, &data, list_len)) {
1621 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1622 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1623 SSL_R_LENGTH_MISMATCH);
1627 /* Clear certificate digests and validity flags */
1628 for (i = 0; i < SSL_PKEY_NUM; i++) {
1629 s->s3->tmp.md[i] = NULL;
1630 s->s3->tmp.valid_flags[i] = 0;
1632 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1633 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1634 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1635 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1638 if (!tls1_process_sigalgs(s)) {
1639 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1640 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1645 /* get the CA RDNs */
1646 if (!PACKET_get_net_2(&pkt, &list_len)
1647 || PACKET_remaining(&pkt) != list_len) {
1648 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1649 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1653 while (PACKET_remaining(&pkt)) {
1654 if (!PACKET_get_net_2(&pkt, &name_len)
1655 || !PACKET_get_bytes(&pkt, &namebytes, name_len)) {
1656 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1657 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1658 SSL_R_LENGTH_MISMATCH);
1662 namestart = namebytes;
1664 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1665 name_len)) == NULL) {
1666 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1667 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1671 if (namebytes != (namestart + name_len)) {
1672 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1673 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1674 SSL_R_CA_DN_LENGTH_MISMATCH);
1677 if (!sk_X509_NAME_push(ca_sk, xn)) {
1678 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1683 /* we should setup a certificate to return.... */
1684 s->s3->tmp.cert_req = 1;
1685 s->s3->tmp.ctype_num = ctype_num;
1686 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1687 s->s3->tmp.ca_names = ca_sk;
1690 ret = MSG_PROCESS_CONTINUE_READING;
1693 statem_set_error(s);
1695 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1699 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1701 return (X509_NAME_cmp(*a, *b));
1704 int ssl3_get_new_session_ticket(SSL *s)
1709 n = s->method->ssl_get_message(s,
1710 SSL3_ST_CR_SESSION_TICKET_A,
1711 SSL3_ST_CR_SESSION_TICKET_B,
1712 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
1717 return tls_process_new_session_ticket(s, (unsigned long)n);
1720 enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, unsigned long n)
1723 unsigned int ticklen;
1724 unsigned long ticket_lifetime_hint;
1727 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1728 al = SSL_AD_INTERNAL_ERROR;
1729 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
1733 if (!PACKET_get_net_4(&pkt, &ticket_lifetime_hint)
1734 || !PACKET_get_net_2(&pkt, &ticklen)
1735 || PACKET_remaining(&pkt) != ticklen) {
1736 al = SSL_AD_DECODE_ERROR;
1737 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1741 /* Server is allowed to change its mind and send an empty ticket. */
1745 if (s->session->session_id_length > 0) {
1746 int i = s->session_ctx->session_cache_mode;
1747 SSL_SESSION *new_sess;
1749 * We reused an existing session, so we need to replace it with a new
1752 if (i & SSL_SESS_CACHE_CLIENT) {
1754 * Remove the old session from the cache
1756 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
1757 if (s->session_ctx->remove_session_cb != NULL)
1758 s->session_ctx->remove_session_cb(s->session_ctx,
1761 /* We carry on if this fails */
1762 SSL_CTX_remove_session(s->session_ctx, s->session);
1766 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1767 al = SSL_AD_INTERNAL_ERROR;
1768 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1772 SSL_SESSION_free(s->session);
1773 s->session = new_sess;
1776 OPENSSL_free(s->session->tlsext_tick);
1777 s->session->tlsext_ticklen = 0;
1779 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1780 if (!s->session->tlsext_tick) {
1781 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1784 if (!PACKET_copy_bytes(&pkt, s->session->tlsext_tick, ticklen)) {
1785 al = SSL_AD_DECODE_ERROR;
1786 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1790 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1791 s->session->tlsext_ticklen = ticklen;
1793 * There are two ways to detect a resumed ticket session. One is to set
1794 * an appropriate session ID and then the server must return a match in
1795 * ServerHello. This allows the normal client session ID matching to work
1796 * and we know much earlier that the ticket has been accepted. The
1797 * other way is to set zero length session ID when the ticket is
1798 * presented and rely on the handshake to determine session resumption.
1799 * We choose the former approach because this fits in with assumptions
1800 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1801 * SHA256 is disabled) hash of the ticket.
1803 EVP_Digest(s->session->tlsext_tick, ticklen,
1804 s->session->session_id, &s->session->session_id_length,
1805 EVP_sha256(), NULL);
1806 return MSG_PROCESS_CONTINUE_READING;
1808 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1810 statem_set_error(s);
1811 return MSG_PROCESS_ERROR;
1814 int ssl3_get_cert_status(SSL *s)
1819 n = s->method->ssl_get_message(s,
1820 SSL3_ST_CR_CERT_STATUS_A,
1821 SSL3_ST_CR_CERT_STATUS_B,
1822 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
1827 return tls_process_cert_status(s, (unsigned long)n);
1830 enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, unsigned long n)
1833 unsigned long resplen;
1837 if (!PACKET_buf_init(&pkt, s->init_msg, n)) {
1838 al = SSL_AD_INTERNAL_ERROR;
1839 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_INTERNAL_ERROR);
1842 if (!PACKET_get_1(&pkt, &type)
1843 || type != TLSEXT_STATUSTYPE_ocsp) {
1844 al = SSL_AD_DECODE_ERROR;
1845 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1848 if (!PACKET_get_net_3(&pkt, &resplen)
1849 || PACKET_remaining(&pkt) != resplen) {
1850 al = SSL_AD_DECODE_ERROR;
1851 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1854 OPENSSL_free(s->tlsext_ocsp_resp);
1855 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1856 if (!s->tlsext_ocsp_resp) {
1857 al = SSL_AD_INTERNAL_ERROR;
1858 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1861 if (!PACKET_copy_bytes(&pkt, s->tlsext_ocsp_resp, resplen)) {
1862 al = SSL_AD_DECODE_ERROR;
1863 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1866 s->tlsext_ocsp_resplen = resplen;
1867 if (s->ctx->tlsext_status_cb) {
1869 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1871 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1872 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
1876 al = SSL_AD_INTERNAL_ERROR;
1877 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1881 return MSG_PROCESS_CONTINUE_READING;
1883 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1884 statem_set_error(s);
1885 return MSG_PROCESS_ERROR;
1888 int ssl3_get_server_done(SSL *s)
1893 /* Second to last param should be very small, like 0 :-) */
1894 n = s->method->ssl_get_message(s,
1895 SSL3_ST_CR_SRVR_DONE_A,
1896 SSL3_ST_CR_SRVR_DONE_B,
1897 SSL3_MT_SERVER_DONE, 30, &ok);
1902 return tls_process_server_done(s, (unsigned long)n);
1905 enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, unsigned long n)
1908 /* should contain no data */
1909 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1910 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1911 statem_set_error(s);
1912 return MSG_PROCESS_ERROR;
1915 #ifndef OPENSSL_NO_SRP
1916 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
1917 if (SRP_Calc_A_param(s) <= 0) {
1918 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
1919 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1920 statem_set_error(s);
1921 return MSG_PROCESS_ERROR;
1926 #ifndef OPENSSL_NO_SCTP
1927 /* Only applies to renegotiation */
1928 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
1929 && s->renegotiate != 0)
1930 return MSG_PROCESS_CONTINUE_PROCESSING;
1933 return MSG_PROCESS_FINISHED_READING;
1936 int ssl3_send_client_key_exchange(SSL *s)
1940 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
1941 if(tls_construct_client_key_exchange(s) == 0)
1944 s->state = SSL3_ST_CW_KEY_EXCH_B;
1947 /* SSL3_ST_CW_KEY_EXCH_B */
1948 n = ssl_do_write(s);
1951 if (tls_client_key_exchange_post_work(s) == 0)
1957 s->state = SSL_ST_ERR;
1962 int tls_construct_client_key_exchange(SSL *s)
1966 #ifndef OPENSSL_NO_PSK
1967 size_t pskhdrlen = 0;
1969 unsigned long alg_k;
1970 #ifndef OPENSSL_NO_RSA
1972 EVP_PKEY *pkey = NULL;
1974 #ifndef OPENSSL_NO_EC
1975 EC_KEY *clnt_ecdh = NULL;
1976 const EC_POINT *srvr_ecpoint = NULL;
1977 EVP_PKEY *srvr_pub_pkey = NULL;
1978 unsigned char *encodedPoint = NULL;
1979 int encoded_pt_len = 0;
1980 BN_CTX *bn_ctx = NULL;
1982 unsigned char *pms = NULL;
1984 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1986 p = ssl_handshake_start(s);
1989 #ifndef OPENSSL_NO_PSK
1990 if (alg_k & SSL_PSK) {
1993 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
1994 * \0-terminated identity. The last byte is for us for simulating
1997 char identity[PSK_MAX_IDENTITY_LEN + 1];
1999 unsigned char psk[PSK_MAX_PSK_LEN];
2002 if (s->psk_client_callback == NULL) {
2003 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2004 SSL_R_PSK_NO_CLIENT_CB);
2008 memset(identity, 0, sizeof(identity));
2010 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2011 identity, sizeof(identity) - 1,
2014 if (psklen > PSK_MAX_PSK_LEN) {
2015 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2016 ERR_R_INTERNAL_ERROR);
2018 } else if (psklen == 0) {
2019 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2020 SSL_R_PSK_IDENTITY_NOT_FOUND);
2024 OPENSSL_free(s->s3->tmp.psk);
2025 s->s3->tmp.psk = BUF_memdup(psk, psklen);
2026 OPENSSL_cleanse(psk, psklen);
2028 if (s->s3->tmp.psk == NULL) {
2029 OPENSSL_cleanse(identity, sizeof(identity));
2033 s->s3->tmp.psklen = psklen;
2035 identitylen = strlen(identity);
2036 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2037 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2038 ERR_R_INTERNAL_ERROR);
2041 OPENSSL_free(s->session->psk_identity);
2042 s->session->psk_identity = BUF_strdup(identity);
2043 if (s->session->psk_identity == NULL) {
2044 OPENSSL_cleanse(identity, sizeof(identity));
2048 s2n(identitylen, p);
2049 memcpy(p, identity, identitylen);
2050 pskhdrlen = 2 + identitylen;
2054 OPENSSL_cleanse(identity, sizeof(identity));
2056 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2060 if (alg_k & SSL_kPSK) {
2065 /* Fool emacs indentation */
2068 #ifndef OPENSSL_NO_RSA
2069 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2071 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2072 pms = OPENSSL_malloc(pmslen);
2076 if (s->session->peer == NULL) {
2078 * We should always have a server certificate with SSL_kRSA.
2080 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2081 ERR_R_INTERNAL_ERROR);
2085 if (s->s3->peer_rsa_tmp != NULL)
2086 rsa = s->s3->peer_rsa_tmp;
2088 pkey = X509_get_pubkey(s->session->peer);
2089 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2090 || (pkey->pkey.rsa == NULL)) {
2091 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2092 ERR_R_INTERNAL_ERROR);
2093 EVP_PKEY_free(pkey);
2096 rsa = pkey->pkey.rsa;
2097 EVP_PKEY_free(pkey);
2100 pms[0] = s->client_version >> 8;
2101 pms[1] = s->client_version & 0xff;
2102 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2106 /* Fix buf for TLS and beyond */
2107 if (s->version > SSL3_VERSION)
2109 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2111 if (s->options & SSL_OP_PKCS1_CHECK_1)
2113 if (s->options & SSL_OP_PKCS1_CHECK_2)
2117 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2118 SSL_R_BAD_RSA_ENCRYPT);
2122 /* Fix buf for TLS and beyond */
2123 if (s->version > SSL3_VERSION) {
2129 #ifndef OPENSSL_NO_DH
2130 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
2131 DH *dh_srvr, *dh_clnt;
2132 if (s->s3->peer_dh_tmp != NULL)
2133 dh_srvr = s->s3->peer_dh_tmp;
2135 /* we get them from the cert */
2136 EVP_PKEY *spkey = NULL;
2138 spkey = X509_get_pubkey(s->session->peer);
2140 dh_srvr = EVP_PKEY_get1_DH(spkey);
2141 EVP_PKEY_free(spkey);
2143 if (dh_srvr == NULL) {
2144 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2145 ERR_R_INTERNAL_ERROR);
2149 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2150 /* Use client certificate key */
2151 EVP_PKEY *clkey = s->cert->key->privatekey;
2154 dh_clnt = EVP_PKEY_get1_DH(clkey);
2155 if (dh_clnt == NULL) {
2156 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2157 ERR_R_INTERNAL_ERROR);
2161 /* generate a new random key */
2162 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2163 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2166 if (!DH_generate_key(dh_clnt)) {
2167 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2173 pmslen = DH_size(dh_clnt);
2174 pms = OPENSSL_malloc(pmslen);
2179 * use the 'p' output buffer for the DH key, but make sure to
2180 * clear it out afterwards
2183 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
2184 if (s->s3->peer_dh_tmp == NULL)
2188 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2194 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2197 /* send off the data */
2198 n = BN_num_bytes(dh_clnt->pub_key);
2200 BN_bn2bin(dh_clnt->pub_key, p);
2208 #ifndef OPENSSL_NO_EC
2209 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
2210 const EC_GROUP *srvr_group = NULL;
2212 int ecdh_clnt_cert = 0;
2215 * Did we send out the client's ECDH share for use in premaster
2216 * computation as part of client certificate? If so, set
2217 * ecdh_clnt_cert to 1.
2219 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
2221 * XXX: For now, we do not support client
2222 * authentication using ECDH certificates.
2223 * To add such support, one needs to add
2224 * code that checks for appropriate
2225 * conditions and sets ecdh_clnt_cert to 1.
2226 * For example, the cert have an ECC
2227 * key on the same curve as the server's
2228 * and the key should be authorized for
2231 * One also needs to add code in ssl3_connect
2232 * to skip sending the certificate verify
2235 * if ((s->cert->key->privatekey != NULL) &&
2236 * (s->cert->key->privatekey->type ==
2237 * EVP_PKEY_EC) && ...)
2238 * ecdh_clnt_cert = 1;
2242 if (s->s3->peer_ecdh_tmp != NULL) {
2243 tkey = s->s3->peer_ecdh_tmp;
2245 /* Get the Server Public Key from Cert */
2246 srvr_pub_pkey = X509_get_pubkey(s->session->peer);
2247 if ((srvr_pub_pkey == NULL)
2248 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2249 || (srvr_pub_pkey->pkey.ec == NULL)) {
2250 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2251 ERR_R_INTERNAL_ERROR);
2255 tkey = srvr_pub_pkey->pkey.ec;
2258 srvr_group = EC_KEY_get0_group(tkey);
2259 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2261 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2262 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2263 ERR_R_INTERNAL_ERROR);
2267 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2268 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2269 ERR_R_MALLOC_FAILURE);
2273 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2274 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2277 if (ecdh_clnt_cert) {
2279 * Reuse key info from our certificate We only need our
2280 * private key to perform the ECDH computation.
2282 const BIGNUM *priv_key;
2283 tkey = s->cert->key->privatekey->pkey.ec;
2284 priv_key = EC_KEY_get0_private_key(tkey);
2285 if (priv_key == NULL) {
2286 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2287 ERR_R_MALLOC_FAILURE);
2290 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2291 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2295 /* Generate a new ECDH key pair */
2296 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2297 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2304 * use the 'p' output buffer for the ECDH key, but make sure to
2305 * clear it out afterwards
2308 field_size = EC_GROUP_get_degree(srvr_group);
2309 if (field_size <= 0) {
2310 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2313 pmslen = (field_size + 7) / 8;
2314 pms = OPENSSL_malloc(pmslen);
2317 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2318 if (n <= 0 || pmslen != (size_t)n) {
2319 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2323 if (ecdh_clnt_cert) {
2324 /* Send empty client key exch message */
2328 * First check the size of encoding and allocate memory
2332 EC_POINT_point2oct(srvr_group,
2333 EC_KEY_get0_public_key(clnt_ecdh),
2334 POINT_CONVERSION_UNCOMPRESSED,
2337 encodedPoint = (unsigned char *)
2338 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2339 bn_ctx = BN_CTX_new();
2340 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2341 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2342 ERR_R_MALLOC_FAILURE);
2346 /* Encode the public key */
2347 n = EC_POINT_point2oct(srvr_group,
2348 EC_KEY_get0_public_key(clnt_ecdh),
2349 POINT_CONVERSION_UNCOMPRESSED,
2350 encodedPoint, encoded_pt_len, bn_ctx);
2352 *p = n; /* length of encoded point */
2353 /* Encoded point will be copied here */
2355 /* copy the point */
2356 memcpy(p, encodedPoint, n);
2357 /* increment n to account for length field */
2361 /* Free allocated memory */
2362 BN_CTX_free(bn_ctx);
2363 OPENSSL_free(encodedPoint);
2364 EC_KEY_free(clnt_ecdh);
2365 EVP_PKEY_free(srvr_pub_pkey);
2367 #endif /* !OPENSSL_NO_EC */
2368 else if (alg_k & SSL_kGOST) {
2369 /* GOST key exchange message creation */
2370 EVP_PKEY_CTX *pkey_ctx;
2373 unsigned int md_len;
2374 unsigned char shared_ukm[32], tmp[256];
2375 EVP_MD_CTX *ukm_hash;
2379 pms = OPENSSL_malloc(pmslen);
2384 * Get server sertificate PKEY and create ctx from it
2386 peer_cert = s->session->peer;
2388 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2389 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2393 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2394 X509_get_pubkey(peer_cert), NULL);
2396 * If we have send a certificate, and certificate key
2398 * * parameters match those of server certificate, use
2399 * certificate key for key exchange
2402 /* Otherwise, generate ephemeral key pair */
2404 EVP_PKEY_encrypt_init(pkey_ctx);
2405 /* Generate session key */
2406 if (RAND_bytes(pms, pmslen) <= 0) {
2407 EVP_PKEY_CTX_free(pkey_ctx);
2408 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2409 ERR_R_INTERNAL_ERROR);
2413 * If we have client certificate, use its secret as peer key
2415 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2416 if (EVP_PKEY_derive_set_peer
2417 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2419 * If there was an error - just ignore it. Ephemeral key
2426 * Compute shared IV and store it in algorithm-specific context
2429 ukm_hash = EVP_MD_CTX_create();
2430 EVP_DigestInit(ukm_hash,
2431 EVP_get_digestbynid(NID_id_GostR3411_94));
2432 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2434 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2436 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2437 EVP_MD_CTX_destroy(ukm_hash);
2438 if (EVP_PKEY_CTX_ctrl
2439 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2441 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2445 /* Make GOST keytransport blob message */
2447 * Encapsulate it into sequence
2449 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2451 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
2452 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2456 if (msglen >= 0x80) {
2458 *(p++) = msglen & 0xff;
2461 *(p++) = msglen & 0xff;
2464 memcpy(p, tmp, msglen);
2465 /* Check if pubkey from client certificate was used */
2466 if (EVP_PKEY_CTX_ctrl
2467 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2468 /* Set flag "skip certificate verify" */
2469 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2471 EVP_PKEY_CTX_free(pkey_ctx);
2472 EVP_PKEY_free(pub_key);
2475 #ifndef OPENSSL_NO_SRP
2476 else if (alg_k & SSL_kSRP) {
2477 if (s->srp_ctx.A != NULL) {
2478 /* send off the data */
2479 n = BN_num_bytes(s->srp_ctx.A);
2481 BN_bn2bin(s->srp_ctx.A, p);
2484 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2485 ERR_R_INTERNAL_ERROR);
2488 OPENSSL_free(s->session->srp_username);
2489 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2490 if (s->session->srp_username == NULL) {
2491 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2492 ERR_R_MALLOC_FAILURE);
2498 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2499 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2503 #ifndef OPENSSL_NO_PSK
2507 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2508 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2509 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2513 s->s3->tmp.pms = pms;
2514 s->s3->tmp.pmslen = pmslen;
2518 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2519 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2521 OPENSSL_clear_free(pms, pmslen);
2522 s->s3->tmp.pms = NULL;
2523 #ifndef OPENSSL_NO_EC
2524 BN_CTX_free(bn_ctx);
2525 OPENSSL_free(encodedPoint);
2526 EC_KEY_free(clnt_ecdh);
2527 EVP_PKEY_free(srvr_pub_pkey);
2529 #ifndef OPENSSL_NO_PSK
2530 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2531 s->s3->tmp.psk = NULL;
2533 statem_set_error(s);
2537 int tls_client_key_exchange_post_work(SSL *s)
2539 unsigned char *pms = NULL;
2542 #ifndef OPENSSL_NO_SRP
2544 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2545 if (!srp_generate_client_master_secret(s)) {
2546 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2547 ERR_R_INTERNAL_ERROR);
2553 pms = s->s3->tmp.pms;
2554 pmslen = s->s3->tmp.pmslen;
2556 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2557 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2558 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2561 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2562 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2563 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2567 #ifndef OPENSSL_NO_SCTP
2568 if (SSL_IS_DTLS(s)) {
2569 unsigned char sctpauthkey[64];
2570 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2573 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2576 snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
2577 DTLS1_SCTP_AUTH_LABEL);
2579 if (SSL_export_keying_material(s, sctpauthkey,
2580 sizeof(sctpauthkey), labelbuffer,
2581 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2584 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2585 sizeof(sctpauthkey), sctpauthkey);
2591 OPENSSL_clear_free(pms, pmslen);
2592 s->s3->tmp.pms = NULL;
2596 int ssl3_send_client_verify(SSL *s)
2598 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2599 if(tls_construct_client_verify(s) == 0)
2602 s->state = SSL3_ST_CW_CERT_VRFY_B;
2605 /* SSL3_ST_CW_CERT_VRFY_B */
2606 return ssl_do_write(s);
2608 s->state = SSL_ST_ERR;
2613 int tls_construct_client_verify(SSL *s)
2616 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2618 EVP_PKEY_CTX *pctx = NULL;
2624 EVP_MD_CTX_init(&mctx);
2626 p = ssl_handshake_start(s);
2627 pkey = s->cert->key->privatekey;
2628 /* Create context from key and test if sha1 is allowed as digest */
2629 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2630 EVP_PKEY_sign_init(pctx);
2631 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2632 if (!SSL_USE_SIGALGS(s))
2633 s->method->ssl3_enc->cert_verify_mac(s,
2636 [MD5_DIGEST_LENGTH]));
2641 * For TLS v1.2 send signature algorithm and signature using agreed
2642 * digest and cached handshake records.
2644 if (SSL_USE_SIGALGS(s)) {
2647 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2648 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2649 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
2650 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2655 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2658 if (!EVP_SignInit_ex(&mctx, md, NULL)
2659 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2660 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
2661 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2666 /* Digest cached records and discard handshake buffer */
2667 if (!ssl3_digest_cached_records(s, 0))
2670 #ifndef OPENSSL_NO_RSA
2671 if (pkey->type == EVP_PKEY_RSA) {
2672 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
2673 if (RSA_sign(NID_md5_sha1, data,
2674 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
2675 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
2676 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB);
2683 #ifndef OPENSSL_NO_DSA
2684 if (pkey->type == EVP_PKEY_DSA) {
2685 if (!DSA_sign(pkey->save_type,
2686 &(data[MD5_DIGEST_LENGTH]),
2687 SHA_DIGEST_LENGTH, &(p[2]),
2688 (unsigned int *)&j, pkey->pkey.dsa)) {
2689 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB);
2696 #ifndef OPENSSL_NO_EC
2697 if (pkey->type == EVP_PKEY_EC) {
2698 if (!ECDSA_sign(pkey->save_type,
2699 &(data[MD5_DIGEST_LENGTH]),
2700 SHA_DIGEST_LENGTH, &(p[2]),
2701 (unsigned int *)&j, pkey->pkey.ec)) {
2702 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
2709 if (pkey->type == NID_id_GostR3410_2001) {
2710 unsigned char signbuf[64];
2712 size_t sigsize = 64;
2713 s->method->ssl3_enc->cert_verify_mac(s,
2714 NID_id_GostR3411_94, data);
2715 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
2716 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2719 for (i = 63, j = 0; i >= 0; j++, i--) {
2720 p[2 + j] = signbuf[i];
2725 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2728 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
2729 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2733 EVP_MD_CTX_cleanup(&mctx);
2734 EVP_PKEY_CTX_free(pctx);
2737 EVP_MD_CTX_cleanup(&mctx);
2738 EVP_PKEY_CTX_free(pctx);
2743 * Check a certificate can be used for client authentication. Currently check
2744 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2745 * certificates can be used and optionally checks suitability for Suite B.
2747 static int ssl3_check_client_certificate(SSL *s)
2749 unsigned long alg_k;
2750 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2752 /* If no suitable signature algorithm can't use certificate */
2753 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2756 * If strict mode check suitability of chain before using it. This also
2757 * adjusts suite B digest if necessary.
2759 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2760 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2762 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2763 /* See if we can use client certificate for fixed DH */
2764 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
2765 int i = s->session->peer_type;
2766 EVP_PKEY *clkey = NULL, *spkey = NULL;
2767 clkey = s->cert->key->privatekey;
2768 /* If client key not DH assume it can be used */
2769 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
2772 spkey = X509_get_pubkey(s->session->peer);
2774 /* Compare server and client parameters */
2775 i = EVP_PKEY_cmp_parameters(clkey, spkey);
2776 EVP_PKEY_free(spkey);
2780 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2786 int ssl3_send_client_certificate(SSL *s)
2788 enum WORK_STATE wst;
2790 if (s->state == SSL3_ST_CW_CERT_A || s->state == SSL3_ST_CW_CERT_B) {
2791 if (s->state == SSL3_ST_CW_CERT_A)
2792 wst = tls_prepare_client_certificate(s, WORK_MORE_A);
2794 wst = tls_prepare_client_certificate(s, WORK_MORE_B);
2795 if (wst == WORK_ERROR)
2797 if (wst == WORK_MORE_A)
2799 if (wst == WORK_MORE_B) {
2800 s->state = SSL3_ST_CW_CERT_B;
2804 s->state = SSL3_ST_CW_CERT_C;
2807 if (s->state == SSL3_ST_CW_CERT_B) {
2808 wst = tls_prepare_client_certificate(s, WORK_MORE_B);
2809 if (wst == WORK_ERROR)
2811 if (wst == WORK_MORE_A)
2814 /* Skip state C...it was entirely temporary in the original code */
2815 s->state = SSL3_ST_CW_CERT_D;
2818 if (tls_construct_client_certificate(s) == 0)
2821 return ssl_do_write(s);
2823 s->state = SSL_ST_ERR;
2828 enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst)
2831 EVP_PKEY *pkey = NULL;
2834 if (wst == WORK_MORE_A) {
2835 /* Let cert callback update client certificates if required */
2836 if (s->cert->cert_cb) {
2837 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2839 s->rwstate = SSL_X509_LOOKUP;
2843 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2844 statem_set_error(s);
2847 s->rwstate = SSL_NOTHING;
2849 if (ssl3_check_client_certificate(s))
2850 return WORK_FINISHED_CONTINUE;
2852 /* Fall through to WORK_MORE_B */
2856 /* We need to get a client cert */
2857 if (wst == WORK_MORE_B) {
2859 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2860 * return(-1); We then get retied later
2862 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2864 s->rwstate = SSL_X509_LOOKUP;
2867 s->rwstate = SSL_NOTHING;
2868 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2869 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2871 } else if (i == 1) {
2873 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2874 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2878 EVP_PKEY_free(pkey);
2879 if (i && !ssl3_check_client_certificate(s))
2882 if (s->version == SSL3_VERSION) {
2883 s->s3->tmp.cert_req = 0;
2884 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2885 return WORK_FINISHED_CONTINUE;
2887 s->s3->tmp.cert_req = 2;
2888 if (!ssl3_digest_cached_records(s, 0)) {
2889 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2890 statem_set_error(s);
2896 return WORK_FINISHED_CONTINUE;
2899 /* Shouldn't ever get here */
2903 int tls_construct_client_certificate(SSL *s)
2905 if (!ssl3_output_cert_chain(s,
2906 (s->s3->tmp.cert_req ==
2907 2) ? NULL : s->cert->key)) {
2908 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2909 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2910 statem_set_error(s);
2917 #define has_bits(i,m) (((i)&(m)) == (m))
2919 int ssl3_check_cert_and_algorithm(SSL *s)
2923 EVP_PKEY *pkey = NULL;
2925 #ifndef OPENSSL_NO_RSA
2928 #ifndef OPENSSL_NO_DH
2931 int al = SSL_AD_HANDSHAKE_FAILURE;
2933 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2934 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2936 /* we don't have a certificate */
2937 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2939 #ifndef OPENSSL_NO_RSA
2940 rsa = s->s3->peer_rsa_tmp;
2942 #ifndef OPENSSL_NO_DH
2943 dh = s->s3->peer_dh_tmp;
2946 /* This is the passed certificate */
2948 idx = s->session->peer_type;
2949 #ifndef OPENSSL_NO_EC
2950 if (idx == SSL_PKEY_ECC) {
2951 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2953 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2958 } else if (alg_a & SSL_aECDSA) {
2959 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2960 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2962 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
2963 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
2967 pkey = X509_get_pubkey(s->session->peer);
2968 pkey_bits = EVP_PKEY_bits(pkey);
2969 i = X509_certificate_type(s->session->peer, pkey);
2970 EVP_PKEY_free(pkey);
2972 /* Check that we have a certificate if we require one */
2973 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2974 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2975 SSL_R_MISSING_RSA_SIGNING_CERT);
2978 #ifndef OPENSSL_NO_DSA
2979 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2980 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2981 SSL_R_MISSING_DSA_SIGNING_CERT);
2985 #ifndef OPENSSL_NO_RSA
2986 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2987 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
2988 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2989 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2990 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2992 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
2993 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
2994 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2995 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2996 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3000 /* server key exchange is not allowed. */
3001 al = SSL_AD_INTERNAL_ERROR;
3002 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3009 #ifndef OPENSSL_NO_DH
3010 if ((alg_k & SSL_kDHE) && (dh == NULL)) {
3011 al = SSL_AD_INTERNAL_ERROR;
3012 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3014 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3015 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3016 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3017 SSL_R_MISSING_DH_RSA_CERT);
3020 # ifndef OPENSSL_NO_DSA
3021 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3022 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3023 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3024 SSL_R_MISSING_DH_DSA_CERT);
3030 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3031 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3032 #ifndef OPENSSL_NO_RSA
3033 if (alg_k & SSL_kRSA) {
3035 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3036 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3038 } else if (RSA_bits(rsa) >
3039 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3040 /* We have a temporary RSA key but it's too large. */
3041 al = SSL_AD_EXPORT_RESTRICTION;
3042 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3043 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3048 #ifndef OPENSSL_NO_DH
3049 if (alg_k & SSL_kDHE) {
3051 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3052 /* We have a temporary DH key but it's too large. */
3053 al = SSL_AD_EXPORT_RESTRICTION;
3054 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3055 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3058 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3059 /* The cert should have had an export DH key. */
3060 al = SSL_AD_EXPORT_RESTRICTION;
3061 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3062 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3067 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3068 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3074 ssl3_send_alert(s, SSL3_AL_FATAL, al);
3078 #ifndef OPENSSL_NO_NEXTPROTONEG
3079 int ssl3_send_next_proto(SSL *s)
3081 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3082 if (tls_construct_next_proto(s) == 0) {
3083 s->state = SSL_ST_ERR;
3086 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3089 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3092 int tls_construct_next_proto(SSL *s)
3094 unsigned int len, padding_len;
3097 len = s->next_proto_negotiated_len;
3098 padding_len = 32 - ((len + 2) % 32);
3099 d = (unsigned char *)s->init_buf->data;
3101 memcpy(d + 5, s->next_proto_negotiated, len);
3102 d[5 + len] = padding_len;
3103 memset(d + 6 + len, 0, padding_len);
3104 *(d++) = SSL3_MT_NEXT_PROTO;
3105 l2n3(2 + len + padding_len, d);
3106 s->init_num = 4 + 2 + len + padding_len;
3113 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3116 #ifndef OPENSSL_NO_ENGINE
3117 if (s->ctx->client_cert_engine) {
3118 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3119 SSL_get_client_CA_list(s),
3120 px509, ppkey, NULL, NULL, NULL);
3125 if (s->ctx->client_cert_cb)
3126 i = s->ctx->client_cert_cb(s, px509, ppkey);
3130 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3136 int empty_reneg_info_scsv = !s->renegotiate;
3137 /* Set disabled masks for this session */
3138 ssl_set_client_disabled(s);
3144 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3145 c = sk_SSL_CIPHER_value(sk, i);
3146 /* Skip disabled ciphers */
3147 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3149 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3150 if (c->id == SSL3_CK_SCSV) {
3151 if (!empty_reneg_info_scsv)
3154 empty_reneg_info_scsv = 0;
3157 j = s->method->put_cipher_by_char(c, p);
3161 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3165 if (empty_reneg_info_scsv) {
3166 static SSL_CIPHER scsv = {
3167 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3169 j = s->method->put_cipher_by_char(&scsv, p);
3171 #ifdef OPENSSL_RI_DEBUG
3173 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3176 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3177 static SSL_CIPHER scsv = {
3178 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3180 j = s->method->put_cipher_by_char(&scsv, p);