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) 1998-2003 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.
126 #include "ssl_locl.h"
127 #include "kssl_lcl.h"
128 #include <openssl/buffer.h>
129 #include <openssl/rand.h>
130 #include <openssl/objects.h>
131 #include <openssl/evp.h>
132 #include <openssl/md5.h>
134 # include <openssl/fips.h>
137 #ifndef OPENSSL_NO_DH
138 # include <openssl/dh.h>
140 #include <openssl/bn.h>
141 #ifndef OPENSSL_NO_ENGINE
142 # include <openssl/engine.h>
145 static SSL_METHOD *ssl3_get_client_method(int ver);
146 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
148 #ifndef OPENSSL_NO_ECDH
149 static int curve_id2nid(int curve_id);
150 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
153 static SSL_METHOD *ssl3_get_client_method(int ver)
155 if (ver == SSL3_VERSION)
156 return (SSLv3_client_method());
161 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
162 ssl_undefined_function,
163 ssl3_connect, ssl3_get_client_method)
165 int ssl3_connect(SSL *s)
168 unsigned long Time = (unsigned long)time(NULL);
169 void (*cb) (const SSL *ssl, int type, int val) = NULL;
171 int new_state, state, skip = 0;
173 RAND_add(&Time, sizeof(Time), 0);
177 if (s->info_callback != NULL)
178 cb = s->info_callback;
179 else if (s->ctx->info_callback != NULL)
180 cb = s->ctx->info_callback;
183 if (!SSL_in_init(s) || SSL_in_before(s))
190 case SSL_ST_RENEGOTIATE:
192 s->state = SSL_ST_CONNECT;
193 s->ctx->stats.sess_connect_renegotiate++;
197 case SSL_ST_BEFORE | SSL_ST_CONNECT:
198 case SSL_ST_OK | SSL_ST_CONNECT:
202 cb(s, SSL_CB_HANDSHAKE_START, 1);
204 if ((s->version & 0xff00) != 0x0300) {
205 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
210 /* s->version=SSL3_VERSION; */
211 s->type = SSL_ST_CONNECT;
213 if (s->init_buf == NULL) {
214 if ((buf = BUF_MEM_new()) == NULL) {
218 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
226 if (!ssl3_setup_buffers(s)) {
231 /* setup buffing BIO */
232 if (!ssl_init_wbio_buffer(s, 0)) {
237 /* don't push the buffering BIO quite yet */
239 ssl3_init_finished_mac(s);
241 s->state = SSL3_ST_CW_CLNT_HELLO_A;
242 s->ctx->stats.sess_connect++;
246 case SSL3_ST_CW_CLNT_HELLO_A:
247 case SSL3_ST_CW_CLNT_HELLO_B:
250 ret = ssl3_client_hello(s);
253 s->state = SSL3_ST_CR_SRVR_HELLO_A;
256 /* turn on buffering for the next lot of output */
257 if (s->bbio != s->wbio)
258 s->wbio = BIO_push(s->bbio, s->wbio);
262 case SSL3_ST_CR_SRVR_HELLO_A:
263 case SSL3_ST_CR_SRVR_HELLO_B:
264 ret = ssl3_get_server_hello(s);
268 s->state = SSL3_ST_CR_FINISHED_A;
269 #ifndef OPENSSL_NO_TLSEXT
270 if (s->tlsext_ticket_expected) {
271 /* receive renewed session ticket */
272 s->state = SSL3_ST_CR_SESSION_TICKET_A;
276 s->state = SSL3_ST_CR_CERT_A;
280 case SSL3_ST_CR_CERT_A:
281 case SSL3_ST_CR_CERT_B:
282 #ifndef OPENSSL_NO_TLSEXT
283 ret = ssl3_check_finished(s);
288 if (s->tlsext_ticket_expected)
289 s->state = SSL3_ST_CR_SESSION_TICKET_A;
291 s->state = SSL3_ST_CR_FINISHED_A;
296 /* Check if it is anon DH/ECDH */
297 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) {
298 ret = ssl3_get_server_certificate(s);
301 #ifndef OPENSSL_NO_TLSEXT
302 if (s->tlsext_status_expected)
303 s->state = SSL3_ST_CR_CERT_STATUS_A;
305 s->state = SSL3_ST_CR_KEY_EXCH_A;
308 s->state = SSL3_ST_CR_KEY_EXCH_A;
314 s->state = SSL3_ST_CR_KEY_EXCH_A;
319 case SSL3_ST_CR_KEY_EXCH_A:
320 case SSL3_ST_CR_KEY_EXCH_B:
321 ret = ssl3_get_key_exchange(s);
324 s->state = SSL3_ST_CR_CERT_REQ_A;
328 * at this point we check that we have the required stuff from
331 if (!ssl3_check_cert_and_algorithm(s)) {
337 case SSL3_ST_CR_CERT_REQ_A:
338 case SSL3_ST_CR_CERT_REQ_B:
339 ret = ssl3_get_certificate_request(s);
342 s->state = SSL3_ST_CR_SRVR_DONE_A;
346 case SSL3_ST_CR_SRVR_DONE_A:
347 case SSL3_ST_CR_SRVR_DONE_B:
348 ret = ssl3_get_server_done(s);
351 if (s->s3->tmp.cert_req)
352 s->state = SSL3_ST_CW_CERT_A;
354 s->state = SSL3_ST_CW_KEY_EXCH_A;
359 case SSL3_ST_CW_CERT_A:
360 case SSL3_ST_CW_CERT_B:
361 case SSL3_ST_CW_CERT_C:
362 case SSL3_ST_CW_CERT_D:
363 ret = ssl3_send_client_certificate(s);
366 s->state = SSL3_ST_CW_KEY_EXCH_A;
370 case SSL3_ST_CW_KEY_EXCH_A:
371 case SSL3_ST_CW_KEY_EXCH_B:
372 ret = ssl3_send_client_key_exchange(s);
376 * EAY EAY EAY need to check for DH fix cert sent back
379 * For TLS, cert_req is set to 2, so a cert chain of nothing is
380 * sent, but no verify packet is sent
383 * XXX: For now, we do not support client authentication in ECDH
384 * cipher suites with ECDH (rather than ECDSA) certificates. We
385 * need to skip the certificate verify message when client's
386 * ECDH public key is sent inside the client certificate.
388 if (s->s3->tmp.cert_req == 1) {
389 s->state = SSL3_ST_CW_CERT_VRFY_A;
391 s->state = SSL3_ST_CW_CHANGE_A;
392 s->s3->change_cipher_spec = 0;
398 case SSL3_ST_CW_CERT_VRFY_A:
399 case SSL3_ST_CW_CERT_VRFY_B:
400 ret = ssl3_send_client_verify(s);
403 s->state = SSL3_ST_CW_CHANGE_A;
405 s->s3->change_cipher_spec = 0;
408 case SSL3_ST_CW_CHANGE_A:
409 case SSL3_ST_CW_CHANGE_B:
410 ret = ssl3_send_change_cipher_spec(s,
412 SSL3_ST_CW_CHANGE_B);
415 s->state = SSL3_ST_CW_FINISHED_A;
418 s->session->cipher = s->s3->tmp.new_cipher;
419 #ifdef OPENSSL_NO_COMP
420 s->session->compress_meth = 0;
422 if (s->s3->tmp.new_compression == NULL)
423 s->session->compress_meth = 0;
425 s->session->compress_meth = s->s3->tmp.new_compression->id;
427 if (!s->method->ssl3_enc->setup_key_block(s)) {
432 if (!s->method->ssl3_enc->change_cipher_state(s,
433 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
441 case SSL3_ST_CW_FINISHED_A:
442 case SSL3_ST_CW_FINISHED_B:
443 ret = ssl3_send_finished(s,
444 SSL3_ST_CW_FINISHED_A,
445 SSL3_ST_CW_FINISHED_B,
447 ssl3_enc->client_finished_label,
449 ssl3_enc->client_finished_label_len);
452 s->s3->flags |= SSL3_FLAGS_CCS_OK;
453 s->state = SSL3_ST_CW_FLUSH;
456 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
458 s->s3->tmp.next_state = SSL_ST_OK;
459 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
460 s->state = SSL_ST_OK;
461 s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
462 s->s3->delay_buf_pop_ret = 0;
465 #ifndef OPENSSL_NO_TLSEXT
467 * Allow NewSessionTicket if ticket expected
469 if (s->tlsext_ticket_expected)
470 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
474 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
479 #ifndef OPENSSL_NO_TLSEXT
480 case SSL3_ST_CR_SESSION_TICKET_A:
481 case SSL3_ST_CR_SESSION_TICKET_B:
482 ret = ssl3_get_new_session_ticket(s);
485 s->state = SSL3_ST_CR_FINISHED_A;
489 case SSL3_ST_CR_CERT_STATUS_A:
490 case SSL3_ST_CR_CERT_STATUS_B:
491 ret = ssl3_get_cert_status(s);
494 s->state = SSL3_ST_CR_KEY_EXCH_A;
499 case SSL3_ST_CR_FINISHED_A:
500 case SSL3_ST_CR_FINISHED_B:
502 s->s3->flags |= SSL3_FLAGS_CCS_OK;
503 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
504 SSL3_ST_CR_FINISHED_B);
509 s->state = SSL3_ST_CW_CHANGE_A;
511 s->state = SSL_ST_OK;
515 case SSL3_ST_CW_FLUSH:
516 s->rwstate = SSL_WRITING;
517 if (BIO_flush(s->wbio) <= 0) {
521 s->rwstate = SSL_NOTHING;
522 s->state = s->s3->tmp.next_state;
526 /* clean a few things up */
527 ssl3_cleanup_key_block(s);
529 if (s->init_buf != NULL) {
530 BUF_MEM_free(s->init_buf);
535 * If we are not 'joining' the last two packets, remove the
538 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
539 ssl_free_wbio_buffer(s);
540 /* else do it later in ssl3_write */
545 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
547 s->ctx->stats.sess_hit++;
551 s->handshake_func = ssl3_connect;
552 s->ctx->stats.sess_connect_good++;
555 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
561 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
567 /* did we do anything */
568 if (!s->s3->tmp.reuse_message && !skip) {
570 if ((ret = BIO_flush(s->wbio)) <= 0)
574 if ((cb != NULL) && (s->state != state)) {
575 new_state = s->state;
577 cb(s, SSL_CB_CONNECT_LOOP, 1);
578 s->state = new_state;
588 cb(s, SSL_CB_CONNECT_EXIT, ret);
592 int ssl3_client_hello(SSL *s)
595 unsigned char *p, *d;
597 unsigned long Time, l;
598 #ifndef OPENSSL_NO_COMP
603 buf = (unsigned char *)s->init_buf->data;
604 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
605 SSL_SESSION *sess = s->session;
606 if ((sess == NULL) || (sess->ssl_version != s->version) ||
607 #ifdef OPENSSL_NO_TLSEXT
608 !sess->session_id_length ||
610 (!sess->session_id_length && !sess->tlsext_tick) ||
612 (sess->not_resumable)) {
613 if (!ssl_get_new_session(s, 0))
616 /* else use the pre-loaded session */
618 p = s->s3->client_random;
619 Time = (unsigned long)time(NULL); /* Time */
621 if (RAND_pseudo_bytes(p, SSL3_RANDOM_SIZE - 4) <= 0)
624 /* Do the message type and length last */
627 *(p++) = s->version >> 8;
628 *(p++) = s->version & 0xff;
629 s->client_version = s->version;
632 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
633 p += SSL3_RANDOM_SIZE;
639 i = s->session->session_id_length;
642 if (i > (int)sizeof(s->session->session_id)) {
643 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
646 memcpy(p, s->session->session_id, i);
650 /* Ciphers supported */
651 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
653 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
660 #ifdef OPENSSL_NO_COMP
663 if (s->ctx->comp_methods == NULL)
666 j = sk_SSL_COMP_num(s->ctx->comp_methods);
668 for (i = 0; i < j; i++) {
669 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
673 *(p++) = 0; /* Add the NULL method */
674 #ifndef OPENSSL_NO_TLSEXT
676 ssl_add_clienthello_tlsext(s, p,
677 buf + SSL3_RT_MAX_PLAIN_LENGTH)) ==
679 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
685 *(d++) = SSL3_MT_CLIENT_HELLO;
688 s->state = SSL3_ST_CW_CLNT_HELLO_B;
689 /* number of bytes to write */
690 s->init_num = p - buf;
694 /* SSL3_ST_CW_CLNT_HELLO_B */
695 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
700 int ssl3_get_server_hello(SSL *s)
702 STACK_OF(SSL_CIPHER) *sk;
704 unsigned char *p, *d;
708 #ifndef OPENSSL_NO_COMP
712 n = s->method->ssl_get_message(s,
713 SSL3_ST_CR_SRVR_HELLO_A,
714 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
719 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) {
720 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
721 if (s->d1->send_cookie == 0) {
722 s->s3->tmp.reuse_message = 1;
724 } else { /* already sent a cookie */
726 al = SSL_AD_UNEXPECTED_MESSAGE;
727 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
733 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
734 al = SSL_AD_UNEXPECTED_MESSAGE;
735 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
739 d = p = (unsigned char *)s->init_msg;
741 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
742 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
743 s->version = (s->version & 0xff00) | p[1];
744 al = SSL_AD_PROTOCOL_VERSION;
749 /* load the server hello data */
750 /* load the server random */
751 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
752 p += SSL3_RANDOM_SIZE;
754 /* get the session-id */
757 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
758 al = SSL_AD_ILLEGAL_PARAMETER;
759 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
763 if (j != 0 && j == s->session->session_id_length
764 && memcmp(p, s->session->session_id, j) == 0) {
765 if (s->sid_ctx_length != s->session->sid_ctx_length
766 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
767 /* actually a client application bug */
768 al = SSL_AD_ILLEGAL_PARAMETER;
769 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
770 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
773 s->s3->flags |= SSL3_FLAGS_CCS_OK;
775 } else { /* a miss or crap from the other end */
778 * If we were trying for session-id reuse, make a new SSL_SESSION so
779 * we don't stuff up other people
782 if (s->session->session_id_length > 0) {
783 if (!ssl_get_new_session(s, 0)) {
784 al = SSL_AD_INTERNAL_ERROR;
788 s->session->session_id_length = j;
789 memcpy(s->session->session_id, p, j); /* j could be 0 */
792 c = ssl_get_cipher_by_char(s, p);
795 al = SSL_AD_ILLEGAL_PARAMETER;
796 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
799 p += ssl_put_cipher_by_char(s, NULL, NULL);
801 sk = ssl_get_ciphers_by_id(s);
802 i = sk_SSL_CIPHER_find(sk, c);
804 /* we did not say we would use this cipher */
805 al = SSL_AD_ILLEGAL_PARAMETER;
806 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
811 * Depending on the session caching (internal/external), the cipher
812 * and/or cipher_id values may not be set. Make sure that cipher_id is
813 * set and use it for comparison.
815 if (s->session->cipher)
816 s->session->cipher_id = s->session->cipher->id;
817 if (s->hit && (s->session->cipher_id != c->id)) {
818 /* Workaround is now obsolete */
820 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
823 al = SSL_AD_ILLEGAL_PARAMETER;
824 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
825 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
829 s->s3->tmp.new_cipher = c;
831 /* lets get the compression algorithm */
833 #ifdef OPENSSL_NO_COMP
835 al = SSL_AD_ILLEGAL_PARAMETER;
836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
837 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
845 comp = ssl3_comp_find(s->ctx->comp_methods, j);
847 if ((j != 0) && (comp == NULL)) {
848 al = SSL_AD_ILLEGAL_PARAMETER;
849 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
850 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
853 s->s3->tmp.new_compression = comp;
856 #ifndef OPENSSL_NO_TLSEXT
858 if (s->version >= SSL3_VERSION) {
859 if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) {
860 /* 'al' set by ssl_parse_serverhello_tlsext */
861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
864 if (ssl_check_serverhello_tlsext(s) <= 0) {
865 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT);
872 /* wrong packet length */
873 al = SSL_AD_DECODE_ERROR;
874 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
880 ssl3_send_alert(s, SSL3_AL_FATAL, al);
881 #ifndef OPENSSL_NO_TLSEXT
887 int ssl3_get_server_certificate(SSL *s)
889 int al, i, ok, ret = -1;
890 unsigned long n, nc, llen, l;
892 const unsigned char *q, *p;
894 STACK_OF(X509) *sk = NULL;
896 EVP_PKEY *pkey = NULL;
897 int need_cert = 1; /* VRS: 0=> will allow null cert if auth ==
900 n = s->method->ssl_get_message(s,
903 -1, s->max_cert_list, &ok);
908 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
909 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) &&
910 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) {
911 s->s3->tmp.reuse_message = 1;
915 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
916 al = SSL_AD_UNEXPECTED_MESSAGE;
917 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
920 p = d = (unsigned char *)s->init_msg;
922 if ((sk = sk_X509_new_null()) == NULL) {
923 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
929 al = SSL_AD_DECODE_ERROR;
930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
933 for (nc = 0; nc < llen;) {
935 if ((l + nc + 3) > llen) {
936 al = SSL_AD_DECODE_ERROR;
937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
938 SSL_R_CERT_LENGTH_MISMATCH);
943 x = d2i_X509(NULL, &q, l);
945 al = SSL_AD_BAD_CERTIFICATE;
946 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
950 al = SSL_AD_DECODE_ERROR;
951 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
952 SSL_R_CERT_LENGTH_MISMATCH);
955 if (!sk_X509_push(sk, x)) {
956 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
964 i = ssl_verify_cert_chain(s, sk);
965 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
966 #ifndef OPENSSL_NO_KRB5
968 new_cipher->algorithms & (SSL_MKEY_MASK | SSL_AUTH_MASK))
969 != (SSL_aKRB5 | SSL_kKRB5)
970 #endif /* OPENSSL_NO_KRB5 */
972 al = ssl_verify_alarm_type(s->verify_result);
973 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
974 SSL_R_CERTIFICATE_VERIFY_FAILED);
977 ERR_clear_error(); /* but we keep s->verify_result */
979 sc = ssl_sess_cert_new();
983 if (s->session->sess_cert)
984 ssl_sess_cert_free(s->session->sess_cert);
985 s->session->sess_cert = sc;
989 * Inconsistency alert: cert_chain does include the peer's certificate,
990 * which we don't include in s3_srvr.c
992 x = sk_X509_value(sk, 0);
995 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
998 pkey = X509_get_pubkey(x);
1000 /* VRS: allow null cert if auth == KRB5 */
1001 need_cert = ((s->s3->tmp.new_cipher->algorithms
1002 & (SSL_MKEY_MASK | SSL_AUTH_MASK))
1003 == (SSL_aKRB5 | SSL_kKRB5)) ? 0 : 1;
1006 printf("pkey,x = %p, %p\n", (void *)pkey, (void *)x);
1007 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey));
1008 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
1009 s->s3->tmp.new_cipher->algorithms, need_cert);
1010 #endif /* KSSL_DEBUG */
1012 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) {
1015 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1016 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1020 i = ssl_cert_type(x, pkey);
1021 if (need_cert && i < 0) {
1024 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1025 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1030 sc->peer_cert_type = i;
1031 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1033 * Why would the following ever happen? We just created sc a couple
1036 if (sc->peer_pkeys[i].x509 != NULL)
1037 X509_free(sc->peer_pkeys[i].x509);
1038 sc->peer_pkeys[i].x509 = x;
1039 sc->peer_key = &(sc->peer_pkeys[i]);
1041 if (s->session->peer != NULL)
1042 X509_free(s->session->peer);
1043 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1044 s->session->peer = x;
1046 sc->peer_cert_type = i;
1047 sc->peer_key = NULL;
1049 if (s->session->peer != NULL)
1050 X509_free(s->session->peer);
1051 s->session->peer = NULL;
1053 s->session->verify_result = s->verify_result;
1060 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1063 EVP_PKEY_free(pkey);
1065 sk_X509_pop_free(sk, X509_free);
1069 int ssl3_get_key_exchange(SSL *s)
1071 #ifndef OPENSSL_NO_RSA
1072 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1075 unsigned char *param, *p;
1077 long i, param_len, n, alg;
1078 EVP_PKEY *pkey = NULL;
1079 #ifndef OPENSSL_NO_RSA
1082 #ifndef OPENSSL_NO_DH
1085 #ifndef OPENSSL_NO_ECDH
1086 EC_KEY *ecdh = NULL;
1087 BN_CTX *bn_ctx = NULL;
1088 EC_POINT *srvr_ecpoint = NULL;
1090 int encoded_pt_len = 0;
1094 * use same message size as in ssl3_get_certificate_request() as
1095 * ServerKeyExchange message may be skipped
1097 n = s->method->ssl_get_message(s,
1098 SSL3_ST_CR_KEY_EXCH_A,
1099 SSL3_ST_CR_KEY_EXCH_B,
1100 -1, s->max_cert_list, &ok);
1105 alg = s->s3->tmp.new_cipher->algorithms;
1106 EVP_MD_CTX_init(&md_ctx);
1108 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1110 * Can't skip server key exchange if this is an ephemeral
1113 if (alg & (SSL_kEDH | SSL_kECDHE)) {
1114 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1115 al = SSL_AD_UNEXPECTED_MESSAGE;
1118 s->s3->tmp.reuse_message = 1;
1122 param = p = (unsigned char *)s->init_msg;
1124 if (s->session->sess_cert != NULL) {
1125 #ifndef OPENSSL_NO_RSA
1126 if (s->session->sess_cert->peer_rsa_tmp != NULL) {
1127 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1128 s->session->sess_cert->peer_rsa_tmp = NULL;
1131 #ifndef OPENSSL_NO_DH
1132 if (s->session->sess_cert->peer_dh_tmp) {
1133 DH_free(s->session->sess_cert->peer_dh_tmp);
1134 s->session->sess_cert->peer_dh_tmp = NULL;
1137 #ifndef OPENSSL_NO_ECDH
1138 if (s->session->sess_cert->peer_ecdh_tmp) {
1139 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1140 s->session->sess_cert->peer_ecdh_tmp = NULL;
1144 s->session->sess_cert = ssl_sess_cert_new();
1147 /* Total length of the parameters including the length prefix */
1150 al = SSL_AD_DECODE_ERROR;
1151 #ifndef OPENSSL_NO_RSA
1152 if (alg & SSL_kRSA) {
1153 /* Temporary RSA keys only allowed in export ciphersuites */
1154 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1155 al = SSL_AD_UNEXPECTED_MESSAGE;
1156 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1159 if ((rsa = RSA_new()) == NULL) {
1160 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1165 if (param_len > n) {
1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1171 if (i > n - param_len) {
1172 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH);
1177 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) {
1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1183 if (2 > n - param_len) {
1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1191 if (i > n - param_len) {
1192 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH);
1197 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) {
1198 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1204 /* this should be because we are using an export cipher */
1207 X509_get_pubkey(s->session->
1208 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1210 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1213 s->session->sess_cert->peer_rsa_tmp = rsa;
1216 #else /* OPENSSL_NO_RSA */
1219 #ifndef OPENSSL_NO_DH
1220 else if (alg & SSL_kEDH) {
1221 if ((dh = DH_new()) == NULL) {
1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1227 if (param_len > n) {
1228 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1233 if (i > n - param_len) {
1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH);
1239 if (!(dh->p = BN_bin2bn(p, i, NULL))) {
1240 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1245 if (2 > n - param_len) {
1246 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1253 if (i > n - param_len) {
1254 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH);
1259 if (!(dh->g = BN_bin2bn(p, i, NULL))) {
1260 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1265 if (2 > n - param_len) {
1266 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1273 if (i > n - param_len) {
1274 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1279 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) {
1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1286 # ifndef OPENSSL_NO_RSA
1289 X509_get_pubkey(s->session->
1290 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1294 # ifndef OPENSSL_NO_DSA
1295 else if (alg & SSL_aDSS)
1297 X509_get_pubkey(s->session->
1298 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].
1301 /* else anonymous DH, so no certificate or pkey. */
1303 s->session->sess_cert->peer_dh_tmp = dh;
1305 } else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) {
1306 al = SSL_AD_ILLEGAL_PARAMETER;
1307 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1308 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1311 #endif /* !OPENSSL_NO_DH */
1313 #ifndef OPENSSL_NO_ECDH
1314 else if (alg & SSL_kECDHE) {
1316 const EC_GROUP *group;
1318 if ((ecdh = EC_KEY_new()) == NULL) {
1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1324 * Extract elliptic curve parameters and the server's ephemeral ECDH
1325 * public key. Keep accumulating lengths of various components in
1326 * param_len and make sure it never exceeds n.
1330 * XXX: For now we only support named (not generic) curves and the
1331 * ECParameters in this case is just three bytes. We also need one
1332 * byte for the length of the encoded point
1335 if (param_len > n) {
1336 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1340 if ((*p != NAMED_CURVE_TYPE) ||
1341 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) {
1342 al = SSL_AD_INTERNAL_ERROR;
1343 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1344 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1348 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1349 if (ngroup == NULL) {
1350 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1353 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1354 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1357 EC_GROUP_free(ngroup);
1359 group = EC_KEY_get0_group(ecdh);
1361 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1362 (EC_GROUP_get_degree(group) > 163)) {
1363 al = SSL_AD_EXPORT_RESTRICTION;
1364 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1365 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1371 /* Next, get the encoded ECPoint */
1372 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1373 ((bn_ctx = BN_CTX_new()) == NULL)) {
1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1378 encoded_pt_len = *p; /* length of encoded point */
1381 if ((encoded_pt_len > n - param_len) ||
1382 (EC_POINT_oct2point(group, srvr_ecpoint,
1383 p, encoded_pt_len, bn_ctx) == 0)) {
1384 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1387 param_len += encoded_pt_len;
1390 p += encoded_pt_len;
1393 * The ECC/TLS specification does not mention the use of DSA to sign
1394 * ECParameters in the server key exchange message. We do support RSA
1398 # ifndef OPENSSL_NO_RSA
1399 else if (alg & SSL_aRSA)
1401 X509_get_pubkey(s->session->
1402 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1404 # ifndef OPENSSL_NO_ECDSA
1405 else if (alg & SSL_aECDSA)
1407 X509_get_pubkey(s->session->
1408 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1410 /* else anonymous ECDH, so no certificate or pkey. */
1411 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1412 s->session->sess_cert->peer_ecdh_tmp = ecdh;
1414 BN_CTX_free(bn_ctx);
1416 EC_POINT_free(srvr_ecpoint);
1417 srvr_ecpoint = NULL;
1418 } else if (alg & SSL_kECDH) {
1419 al = SSL_AD_UNEXPECTED_MESSAGE;
1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1423 #endif /* !OPENSSL_NO_ECDH */
1424 if (alg & SSL_aFZA) {
1425 al = SSL_AD_HANDSHAKE_FAILURE;
1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1427 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1431 /* p points to the next byte, there are 'n' bytes left */
1433 /* if it was signed, check the signature */
1437 j = EVP_PKEY_size(pkey);
1440 * Check signature length. If n is 0 then signature is empty
1442 if ((i != n) || (n > j) || (n <= 0)) {
1443 /* wrong packet length */
1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1447 #ifndef OPENSSL_NO_RSA
1448 if (pkey->type == EVP_PKEY_RSA) {
1454 for (num = 2; num > 0; num--) {
1455 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1456 EVP_DigestInit_ex(&md_ctx, (num == 2)
1457 ? s->ctx->md5 : s->ctx->sha1, NULL);
1458 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1460 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1462 EVP_DigestUpdate(&md_ctx, param, param_len);
1463 EVP_DigestFinal_ex(&md_ctx, q, &size);
1467 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa);
1469 al = SSL_AD_DECRYPT_ERROR;
1470 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1475 al = SSL_AD_DECRYPT_ERROR;
1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1481 #ifndef OPENSSL_NO_DSA
1482 if (pkey->type == EVP_PKEY_DSA) {
1484 EVP_VerifyInit_ex(&md_ctx, EVP_dss1(), NULL);
1485 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1487 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1489 EVP_VerifyUpdate(&md_ctx, param, param_len);
1490 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1492 al = SSL_AD_DECRYPT_ERROR;
1493 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1498 #ifndef OPENSSL_NO_ECDSA
1499 if (pkey->type == EVP_PKEY_EC) {
1500 /* let's do ECDSA */
1501 EVP_VerifyInit_ex(&md_ctx, EVP_ecdsa(), NULL);
1502 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1504 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1506 EVP_VerifyUpdate(&md_ctx, param, param_len);
1507 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1509 al = SSL_AD_DECRYPT_ERROR;
1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1520 /* still data left over */
1521 if (!(alg & SSL_aNULL)) {
1522 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1530 EVP_PKEY_free(pkey);
1531 EVP_MD_CTX_cleanup(&md_ctx);
1534 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1536 EVP_PKEY_free(pkey);
1537 #ifndef OPENSSL_NO_RSA
1541 #ifndef OPENSSL_NO_DH
1545 #ifndef OPENSSL_NO_ECDH
1546 BN_CTX_free(bn_ctx);
1547 EC_POINT_free(srvr_ecpoint);
1551 EVP_MD_CTX_cleanup(&md_ctx);
1555 int ssl3_get_certificate_request(SSL *s)
1558 unsigned long n, nc, l;
1559 unsigned int llen, ctype_num, i;
1560 X509_NAME *xn = NULL;
1561 const unsigned char *p, *q;
1563 STACK_OF(X509_NAME) *ca_sk = NULL;
1565 n = s->method->ssl_get_message(s,
1566 SSL3_ST_CR_CERT_REQ_A,
1567 SSL3_ST_CR_CERT_REQ_B,
1568 -1, s->max_cert_list, &ok);
1573 s->s3->tmp.cert_req = 0;
1575 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1576 s->s3->tmp.reuse_message = 1;
1580 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1581 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1582 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
1586 /* TLS does not like anon-DH with client cert */
1587 if (s->version > SSL3_VERSION) {
1588 l = s->s3->tmp.new_cipher->algorithms;
1589 if (l & SSL_aNULL) {
1590 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1591 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1592 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1597 p = d = (unsigned char *)s->init_msg;
1599 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1600 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1604 /* get the certificate types */
1606 if (ctype_num > SSL3_CT_NUMBER)
1607 ctype_num = SSL3_CT_NUMBER;
1608 for (i = 0; i < ctype_num; i++)
1609 s->s3->tmp.ctype[i] = p[i];
1612 /* get the CA RDNs */
1617 out = fopen("/tmp/vsign.der", "w");
1618 fwrite(p, 1, llen, out);
1623 if ((llen + ctype_num + 2 + 1) != n) {
1624 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1625 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1629 for (nc = 0; nc < llen;) {
1631 if ((l + nc + 2) > llen) {
1632 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1633 goto cont; /* netscape bugs */
1634 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1635 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG);
1641 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
1642 /* If netscape tolerance is on, ignore errors */
1643 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1646 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1647 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1653 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1654 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1655 SSL_R_CA_DN_LENGTH_MISMATCH);
1658 if (!sk_X509_NAME_push(ca_sk, xn)) {
1659 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1672 /* we should setup a certificate to return.... */
1673 s->s3->tmp.cert_req = 1;
1674 s->s3->tmp.ctype_num = ctype_num;
1675 if (s->s3->tmp.ca_names != NULL)
1676 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1677 s->s3->tmp.ca_names = ca_sk;
1683 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1687 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1689 return (X509_NAME_cmp(*a, *b));
1692 #ifndef OPENSSL_NO_TLSEXT
1693 int ssl3_get_new_session_ticket(SSL *s)
1695 int ok, al, ret = 0, ticklen;
1697 const unsigned char *p;
1700 n = s->method->ssl_get_message(s,
1701 SSL3_ST_CR_SESSION_TICKET_A,
1702 SSL3_ST_CR_SESSION_TICKET_B,
1708 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) {
1709 s->s3->tmp.reuse_message = 1;
1712 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) {
1713 al = SSL_AD_UNEXPECTED_MESSAGE;
1714 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_BAD_MESSAGE_TYPE);
1718 /* need at least ticket_lifetime_hint + ticket length */
1719 al = SSL_AD_DECODE_ERROR;
1720 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1724 p = d = (unsigned char *)s->init_msg;
1726 if (s->session->session_id_length > 0) {
1727 int i = s->session_ctx->session_cache_mode;
1728 SSL_SESSION *new_sess;
1730 * We reused an existing session, so we need to replace it with a new
1733 if (i & SSL_SESS_CACHE_CLIENT) {
1735 * Remove the old session from the cache
1737 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
1738 if (s->session_ctx->remove_session_cb != NULL)
1739 s->session_ctx->remove_session_cb(s->session_ctx,
1742 /* We carry on if this fails */
1743 SSL_CTX_remove_session(s->session_ctx, s->session);
1747 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1748 al = SSL_AD_INTERNAL_ERROR;
1749 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1753 SSL_SESSION_free(s->session);
1754 s->session = new_sess;
1757 n2l(p, s->session->tlsext_tick_lifetime_hint);
1759 /* ticket_lifetime_hint + ticket_length + ticket */
1760 if (ticklen + 6 != n) {
1761 al = SSL_AD_DECODE_ERROR;
1762 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1765 if (s->session->tlsext_tick) {
1766 OPENSSL_free(s->session->tlsext_tick);
1767 s->session->tlsext_ticklen = 0;
1769 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1770 if (!s->session->tlsext_tick) {
1771 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1774 memcpy(s->session->tlsext_tick, p, ticklen);
1775 s->session->tlsext_ticklen = ticklen;
1777 * There are two ways to detect a resumed ticket sesion. One is to set an
1778 * appropriate session ID and then the server must return a match in
1779 * ServerHello. This allows the normal client session ID matching to work
1780 * and we know much earlier that the ticket has been accepted. The
1781 * other way is to set zero length session ID when the ticket is
1782 * presented and rely on the handshake to determine session resumption.
1783 * We choose the former approach because this fits in with assumptions
1784 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1785 * SHA256 is disabled) hash of the ticket.
1787 EVP_Digest(p, ticklen,
1788 s->session->session_id, &s->session->session_id_length,
1789 # ifndef OPENSSL_NO_SHA256
1790 EVP_sha256(), NULL);
1797 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1802 int ssl3_get_cert_status(SSL *s)
1805 unsigned long resplen;
1807 const unsigned char *p;
1809 n = s->method->ssl_get_message(s,
1810 SSL3_ST_CR_CERT_STATUS_A,
1811 SSL3_ST_CR_CERT_STATUS_B,
1812 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
1817 /* need at least status type + length */
1818 al = SSL_AD_DECODE_ERROR;
1819 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1822 p = (unsigned char *)s->init_msg;
1823 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
1824 al = SSL_AD_DECODE_ERROR;
1825 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1829 if (resplen + 4 != (unsigned long)n) {
1830 al = SSL_AD_DECODE_ERROR;
1831 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1834 if (s->tlsext_ocsp_resp)
1835 OPENSSL_free(s->tlsext_ocsp_resp);
1836 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1837 if (!s->tlsext_ocsp_resp) {
1838 al = SSL_AD_INTERNAL_ERROR;
1839 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1842 s->tlsext_ocsp_resplen = resplen;
1843 if (s->ctx->tlsext_status_cb) {
1845 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1847 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1848 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
1852 al = SSL_AD_INTERNAL_ERROR;
1853 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1859 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1864 int ssl3_get_server_done(SSL *s)
1869 /* Second to last param should be very small, like 0 :-) */
1870 n = s->method->ssl_get_message(s,
1871 SSL3_ST_CR_SRVR_DONE_A,
1872 SSL3_ST_CR_SRVR_DONE_B,
1873 SSL3_MT_SERVER_DONE, 30, &ok);
1878 /* should contain no data */
1879 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1880 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1887 int ssl3_send_client_key_exchange(SSL *s)
1889 unsigned char *p, *d;
1892 #ifndef OPENSSL_NO_RSA
1894 EVP_PKEY *pkey = NULL;
1896 #ifndef OPENSSL_NO_KRB5
1898 #endif /* OPENSSL_NO_KRB5 */
1899 #ifndef OPENSSL_NO_ECDH
1900 EC_KEY *clnt_ecdh = NULL;
1901 const EC_POINT *srvr_ecpoint = NULL;
1902 EVP_PKEY *srvr_pub_pkey = NULL;
1903 unsigned char *encodedPoint = NULL;
1904 int encoded_pt_len = 0;
1905 BN_CTX *bn_ctx = NULL;
1908 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
1909 d = (unsigned char *)s->init_buf->data;
1912 l = s->s3->tmp.new_cipher->algorithms;
1914 /* Fool emacs indentation */
1917 #ifndef OPENSSL_NO_RSA
1918 else if (l & SSL_kRSA) {
1920 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1922 if (s->session->sess_cert == NULL) {
1924 * We should always have a server certificate with SSL_kRSA.
1926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1927 ERR_R_INTERNAL_ERROR);
1931 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1932 rsa = s->session->sess_cert->peer_rsa_tmp;
1935 X509_get_pubkey(s->session->
1936 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].
1938 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
1939 || (pkey->pkey.rsa == NULL)) {
1940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1941 ERR_R_INTERNAL_ERROR);
1944 rsa = pkey->pkey.rsa;
1945 EVP_PKEY_free(pkey);
1948 tmp_buf[0] = s->client_version >> 8;
1949 tmp_buf[1] = s->client_version & 0xff;
1950 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0)
1953 s->session->master_key_length = sizeof tmp_buf;
1956 /* Fix buf for TLS and beyond */
1957 if (s->version > SSL3_VERSION)
1959 n = RSA_public_encrypt(sizeof tmp_buf,
1960 tmp_buf, p, rsa, RSA_PKCS1_PADDING);
1962 if (s->options & SSL_OP_PKCS1_CHECK_1)
1964 if (s->options & SSL_OP_PKCS1_CHECK_2)
1968 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1969 SSL_R_BAD_RSA_ENCRYPT);
1973 /* Fix buf for TLS and beyond */
1974 if (s->version > SSL3_VERSION) {
1979 s->session->master_key_length =
1980 s->method->ssl3_enc->generate_master_secret(s,
1982 session->master_key,
1985 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1988 #ifndef OPENSSL_NO_KRB5
1989 else if (l & SSL_kKRB5) {
1990 krb5_error_code krb5rc;
1991 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1992 /* krb5_data krb5_ap_req; */
1993 krb5_data *enc_ticket;
1994 krb5_data authenticator, *authp = NULL;
1995 EVP_CIPHER_CTX ciph_ctx;
1996 EVP_CIPHER *enc = NULL;
1997 unsigned char iv[EVP_MAX_IV_LENGTH];
1998 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1999 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH];
2000 int padl, outl = sizeof(epms);
2002 EVP_CIPHER_CTX_init(&ciph_ctx);
2005 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2007 # endif /* KSSL_DEBUG */
2010 # ifdef KRB5SENDAUTH
2012 authp = &authenticator;
2013 # endif /* KRB5SENDAUTH */
2015 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err);
2016 enc = kssl_map_enc(kssl_ctx->enctype);
2021 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2022 if (krb5rc && kssl_err.text)
2023 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2025 # endif /* KSSL_DEBUG */
2028 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2029 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason);
2034 * 20010406 VRS - Earlier versions used KRB5 AP_REQ
2035 * in place of RFC 2712 KerberosWrapper, as in:
2037 * Send ticket (copy to *p, set n = length)
2038 * n = krb5_ap_req.length;
2039 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2040 * if (krb5_ap_req.data)
2041 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2043 * Now using real RFC 2712 KerberosWrapper
2044 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2045 * Note: 2712 "opaque" types are here replaced
2046 * with a 2-byte length followed by the value.
2048 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2049 * Where "xx xx" = length bytes. Shown here with
2050 * optional authenticator omitted.
2053 /* KerberosWrapper.Ticket */
2054 s2n(enc_ticket->length, p);
2055 memcpy(p, enc_ticket->data, enc_ticket->length);
2056 p += enc_ticket->length;
2057 n = enc_ticket->length + 2;
2059 /* KerberosWrapper.Authenticator */
2060 if (authp && authp->length) {
2061 s2n(authp->length, p);
2062 memcpy(p, authp->data, authp->length);
2064 n += authp->length + 2;
2070 s2n(0, p); /* null authenticator length */
2074 tmp_buf[0] = s->client_version >> 8;
2075 tmp_buf[1] = s->client_version & 0xff;
2076 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0)
2080 * 20010420 VRS. Tried it this way; failed.
2081 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2082 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2083 * kssl_ctx->length);
2084 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2087 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2088 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv);
2089 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf,
2091 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl);
2093 if (outl > sizeof epms) {
2094 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2095 ERR_R_INTERNAL_ERROR);
2098 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2100 /* KerberosWrapper.EncryptedPreMasterSecret */
2102 memcpy(p, epms, outl);
2106 s->session->master_key_length =
2107 s->method->ssl3_enc->generate_master_secret(s,
2109 session->master_key,
2113 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2114 OPENSSL_cleanse(epms, outl);
2117 #ifndef OPENSSL_NO_DH
2118 else if (l & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) {
2119 DH *dh_srvr, *dh_clnt;
2121 if (s->session->sess_cert == NULL) {
2122 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2123 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2124 SSL_R_UNEXPECTED_MESSAGE);
2128 if (s->session->sess_cert->peer_dh_tmp != NULL)
2129 dh_srvr = s->session->sess_cert->peer_dh_tmp;
2131 /* we get them from the cert */
2132 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2133 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2134 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2138 /* generate a new random key */
2139 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2140 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2143 if (!DH_generate_key(dh_clnt)) {
2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2149 * use the 'p' output buffer for the DH key, but make sure to
2150 * clear it out afterwards
2153 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt);
2156 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2160 /* generate master key from the result */
2161 s->session->master_key_length =
2162 s->method->ssl3_enc->generate_master_secret(s,
2164 session->master_key,
2169 /* send off the data */
2170 n = BN_num_bytes(dh_clnt->pub_key);
2172 BN_bn2bin(dh_clnt->pub_key, p);
2177 /* perhaps clean things up a bit EAY EAY EAY EAY */
2181 #ifndef OPENSSL_NO_ECDH
2182 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) {
2183 const EC_GROUP *srvr_group = NULL;
2185 int ecdh_clnt_cert = 0;
2188 if (s->session->sess_cert == NULL) {
2189 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2190 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2191 SSL_R_UNEXPECTED_MESSAGE);
2196 * Did we send out the client's ECDH share for use in premaster
2197 * computation as part of client certificate? If so, set
2198 * ecdh_clnt_cert to 1.
2200 if ((l & SSL_kECDH) && (s->cert != NULL)) {
2202 * XXX: For now, we do not support client
2203 * authentication using ECDH certificates.
2204 * To add such support, one needs to add
2205 * code that checks for appropriate
2206 * conditions and sets ecdh_clnt_cert to 1.
2207 * For example, the cert have an ECC
2208 * key on the same curve as the server's
2209 * and the key should be authorized for
2212 * One also needs to add code in ssl3_connect
2213 * to skip sending the certificate verify
2216 * if ((s->cert->key->privatekey != NULL) &&
2217 * (s->cert->key->privatekey->type ==
2218 * EVP_PKEY_EC) && ...)
2219 * ecdh_clnt_cert = 1;
2223 if (s->session->sess_cert->peer_ecdh_tmp != NULL) {
2224 tkey = s->session->sess_cert->peer_ecdh_tmp;
2226 /* Get the Server Public Key from Cert */
2228 X509_get_pubkey(s->session->
2229 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2230 if ((srvr_pub_pkey == NULL)
2231 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2232 || (srvr_pub_pkey->pkey.ec == NULL)) {
2233 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2234 ERR_R_INTERNAL_ERROR);
2238 tkey = srvr_pub_pkey->pkey.ec;
2241 srvr_group = EC_KEY_get0_group(tkey);
2242 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2244 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2245 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2246 ERR_R_INTERNAL_ERROR);
2250 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2251 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2252 ERR_R_MALLOC_FAILURE);
2256 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2257 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2260 if (ecdh_clnt_cert) {
2262 * Reuse key info from our certificate We only need our
2263 * private key to perform the ECDH computation.
2265 const BIGNUM *priv_key;
2266 tkey = s->cert->key->privatekey->pkey.ec;
2267 priv_key = EC_KEY_get0_private_key(tkey);
2268 if (priv_key == NULL) {
2269 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2270 ERR_R_MALLOC_FAILURE);
2273 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2274 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2278 /* Generate a new ECDH key pair */
2279 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2280 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2287 * use the 'p' output buffer for the ECDH key, but make sure to
2288 * clear it out afterwards
2291 field_size = EC_GROUP_get_degree(srvr_group);
2292 if (field_size <= 0) {
2293 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2296 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint,
2299 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2303 /* generate master key from the result */
2304 s->session->master_key_length =
2305 s->method->ssl3_enc->generate_master_secret(s,
2307 session->master_key,
2310 memset(p, 0, n); /* clean up */
2312 if (ecdh_clnt_cert) {
2313 /* Send empty client key exch message */
2317 * First check the size of encoding and allocate memory
2321 EC_POINT_point2oct(srvr_group,
2322 EC_KEY_get0_public_key(clnt_ecdh),
2323 POINT_CONVERSION_UNCOMPRESSED,
2326 encodedPoint = (unsigned char *)
2327 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2328 bn_ctx = BN_CTX_new();
2329 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2330 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2331 ERR_R_MALLOC_FAILURE);
2335 /* Encode the public key */
2336 n = EC_POINT_point2oct(srvr_group,
2337 EC_KEY_get0_public_key(clnt_ecdh),
2338 POINT_CONVERSION_UNCOMPRESSED,
2339 encodedPoint, encoded_pt_len, bn_ctx);
2341 *p = n; /* length of encoded point */
2342 /* Encoded point will be copied here */
2344 /* copy the point */
2345 memcpy((unsigned char *)p, encodedPoint, n);
2346 /* increment n to account for length field */
2350 /* Free allocated memory */
2351 BN_CTX_free(bn_ctx);
2352 if (encodedPoint != NULL)
2353 OPENSSL_free(encodedPoint);
2354 if (clnt_ecdh != NULL)
2355 EC_KEY_free(clnt_ecdh);
2356 EVP_PKEY_free(srvr_pub_pkey);
2358 #endif /* !OPENSSL_NO_ECDH */
2360 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2361 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2365 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE;
2368 s->state = SSL3_ST_CW_KEY_EXCH_B;
2369 /* number of bytes to write */
2370 s->init_num = n + 4;
2374 /* SSL3_ST_CW_KEY_EXCH_B */
2375 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
2377 #ifndef OPENSSL_NO_ECDH
2378 BN_CTX_free(bn_ctx);
2379 if (encodedPoint != NULL)
2380 OPENSSL_free(encodedPoint);
2381 if (clnt_ecdh != NULL)
2382 EC_KEY_free(clnt_ecdh);
2383 EVP_PKEY_free(srvr_pub_pkey);
2388 int ssl3_send_client_verify(SSL *s)
2390 unsigned char *p, *d;
2391 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2393 #ifndef OPENSSL_NO_RSA
2397 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2401 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2402 d = (unsigned char *)s->init_buf->data;
2404 pkey = s->cert->key->privatekey;
2406 s->method->ssl3_enc->cert_verify_mac(s, &(s->s3->finish_dgst2),
2407 &(data[MD5_DIGEST_LENGTH]));
2409 #ifndef OPENSSL_NO_RSA
2410 if (pkey->type == EVP_PKEY_RSA) {
2411 s->method->ssl3_enc->cert_verify_mac(s,
2412 &(s->s3->finish_dgst1),
2415 (NID_md5_sha1, data, MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
2416 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
2417 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
2424 #ifndef OPENSSL_NO_DSA
2425 if (pkey->type == EVP_PKEY_DSA) {
2426 if (!DSA_sign(pkey->save_type,
2427 &(data[MD5_DIGEST_LENGTH]),
2428 SHA_DIGEST_LENGTH, &(p[2]),
2429 (unsigned int *)&j, pkey->pkey.dsa)) {
2430 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
2437 #ifndef OPENSSL_NO_ECDSA
2438 if (pkey->type == EVP_PKEY_EC) {
2439 if (!ECDSA_sign(pkey->save_type,
2440 &(data[MD5_DIGEST_LENGTH]),
2441 SHA_DIGEST_LENGTH, &(p[2]),
2442 (unsigned int *)&j, pkey->pkey.ec)) {
2443 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
2451 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2454 *(d++) = SSL3_MT_CERTIFICATE_VERIFY;
2457 s->state = SSL3_ST_CW_CERT_VRFY_B;
2458 s->init_num = (int)n + 4;
2461 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
2466 int ssl3_send_client_certificate(SSL *s)
2469 EVP_PKEY *pkey = NULL;
2473 if (s->state == SSL3_ST_CW_CERT_A) {
2474 if ((s->cert == NULL) ||
2475 (s->cert->key->x509 == NULL) ||
2476 (s->cert->key->privatekey == NULL))
2477 s->state = SSL3_ST_CW_CERT_B;
2479 s->state = SSL3_ST_CW_CERT_C;
2482 /* We need to get a client cert */
2483 if (s->state == SSL3_ST_CW_CERT_B) {
2485 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2486 * return(-1); We then get retied later
2489 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2491 s->rwstate = SSL_X509_LOOKUP;
2494 s->rwstate = SSL_NOTHING;
2495 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2496 s->state = SSL3_ST_CW_CERT_B;
2497 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2499 } else if (i == 1) {
2501 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
2502 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2508 EVP_PKEY_free(pkey);
2510 if (s->version == SSL3_VERSION) {
2511 s->s3->tmp.cert_req = 0;
2512 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2515 s->s3->tmp.cert_req = 2;
2519 /* Ok, we have a cert */
2520 s->state = SSL3_ST_CW_CERT_C;
2523 if (s->state == SSL3_ST_CW_CERT_C) {
2524 s->state = SSL3_ST_CW_CERT_D;
2525 l = ssl3_output_cert_chain(s,
2526 (s->s3->tmp.cert_req ==
2527 2) ? NULL : s->cert->key->x509);
2528 s->init_num = (int)l;
2531 /* SSL3_ST_CW_CERT_D */
2532 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
2535 #define has_bits(i,m) (((i)&(m)) == (m))
2537 int ssl3_check_cert_and_algorithm(SSL *s)
2541 EVP_PKEY *pkey = NULL;
2543 #ifndef OPENSSL_NO_RSA
2546 #ifndef OPENSSL_NO_DH
2550 sc = s->session->sess_cert;
2552 algs = s->s3->tmp.new_cipher->algorithms;
2554 /* we don't have a certificate */
2555 if (algs & (SSL_aDH | SSL_aNULL | SSL_aKRB5))
2559 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2562 #ifndef OPENSSL_NO_RSA
2563 rsa = s->session->sess_cert->peer_rsa_tmp;
2565 #ifndef OPENSSL_NO_DH
2566 dh = s->session->sess_cert->peer_dh_tmp;
2569 /* This is the passed certificate */
2571 idx = sc->peer_cert_type;
2572 #ifndef OPENSSL_NO_ECDH
2573 if (idx == SSL_PKEY_ECC) {
2574 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2575 s->s3->tmp.new_cipher) == 0) {
2577 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2584 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509);
2585 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey);
2586 EVP_PKEY_free(pkey);
2588 /* Check that we have a certificate if we require one */
2589 if ((algs & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2590 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2591 SSL_R_MISSING_RSA_SIGNING_CERT);
2594 #ifndef OPENSSL_NO_DSA
2595 else if ((algs & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2597 SSL_R_MISSING_DSA_SIGNING_CERT);
2601 #ifndef OPENSSL_NO_RSA
2602 if ((algs & SSL_kRSA) &&
2603 !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) {
2604 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2605 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2609 #ifndef OPENSSL_NO_DH
2610 if ((algs & SSL_kEDH) &&
2611 !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) {
2612 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY);
2614 } else if ((algs & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
2615 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2616 SSL_R_MISSING_DH_RSA_CERT);
2619 # ifndef OPENSSL_NO_DSA
2620 else if ((algs & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
2621 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2622 SSL_R_MISSING_DH_DSA_CERT);
2628 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) {
2629 #ifndef OPENSSL_NO_RSA
2630 if (algs & SSL_kRSA) {
2632 || RSA_size(rsa) * 8 >
2633 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
2634 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2635 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2640 #ifndef OPENSSL_NO_DH
2641 if (algs & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) {
2643 || DH_size(dh) * 8 >
2644 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
2645 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2646 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2652 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2653 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2659 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2664 #ifndef OPENSSL_NO_ECDH
2665 /* This is the complement of nid2curve_id in s3_srvr.c. */
2666 static int curve_id2nid(int curve_id)
2669 * ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) (no changes
2670 * in draft-ietf-tls-ecc-03.txt [June 2003])
2672 static int nid_list[26] = {
2674 NID_sect163k1, /* sect163k1 (1) */
2675 NID_sect163r1, /* sect163r1 (2) */
2676 NID_sect163r2, /* sect163r2 (3) */
2677 NID_sect193r1, /* sect193r1 (4) */
2678 NID_sect193r2, /* sect193r2 (5) */
2679 NID_sect233k1, /* sect233k1 (6) */
2680 NID_sect233r1, /* sect233r1 (7) */
2681 NID_sect239k1, /* sect239k1 (8) */
2682 NID_sect283k1, /* sect283k1 (9) */
2683 NID_sect283r1, /* sect283r1 (10) */
2684 NID_sect409k1, /* sect409k1 (11) */
2685 NID_sect409r1, /* sect409r1 (12) */
2686 NID_sect571k1, /* sect571k1 (13) */
2687 NID_sect571r1, /* sect571r1 (14) */
2688 NID_secp160k1, /* secp160k1 (15) */
2689 NID_secp160r1, /* secp160r1 (16) */
2690 NID_secp160r2, /* secp160r2 (17) */
2691 NID_secp192k1, /* secp192k1 (18) */
2692 NID_X9_62_prime192v1, /* secp192r1 (19) */
2693 NID_secp224k1, /* secp224k1 (20) */
2694 NID_secp224r1, /* secp224r1 (21) */
2695 NID_secp256k1, /* secp256k1 (22) */
2696 NID_X9_62_prime256v1, /* secp256r1 (23) */
2697 NID_secp384r1, /* secp384r1 (24) */
2698 NID_secp521r1 /* secp521r1 (25) */
2701 if ((curve_id < 1) || (curve_id > 25))
2704 return nid_list[curve_id];
2709 * Check to see if handshake is full or resumed. Usually this is just a case
2710 * of checking to see if a cache hit has occurred. In the case of session
2711 * tickets we have to check the next message to be sure.
2714 #ifndef OPENSSL_NO_TLSEXT
2715 int ssl3_check_finished(SSL *s)
2720 * If we have no ticket or session ID is non-zero length (a match of a
2721 * non-zero session length would never reach here) it cannot be a resumed
2724 if (!s->session->tlsext_tick || s->session->session_id_length)
2727 * this function is called when we really expect a Certificate message,
2728 * so permit appropriate message length
2730 n = s->method->ssl_get_message(s,
2733 -1, s->max_cert_list, &ok);
2736 s->s3->tmp.reuse_message = 1;
2737 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
2738 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2745 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2748 #ifndef OPENSSL_NO_ENGINE
2749 if (s->ctx->client_cert_engine) {
2750 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2751 SSL_get_client_CA_list(s),
2752 px509, ppkey, NULL, NULL, NULL);
2757 if (s->ctx->client_cert_cb)
2758 i = s->ctx->client_cert_cb(s, px509, ppkey);