3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
59 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
60 * All rights reserved.
62 * This package is an SSL implementation written
63 * by Eric Young (eay@cryptsoft.com).
64 * The implementation was written so as to conform with Netscapes SSL.
66 * This library is free for commercial and non-commercial use as long as
67 * the following conditions are aheared to. The following conditions
68 * apply to all code found in this distribution, be it the RC4, RSA,
69 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
70 * included with this distribution is covered by the same copyright terms
71 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
73 * Copyright remains Eric Young's, and as such any Copyright notices in
74 * the code are not to be removed.
75 * If this package is used in a product, Eric Young should be given attribution
76 * as the author of the parts of the library used.
77 * This can be in the form of a textual message at program startup or
78 * in documentation (online or textual) provided with the package.
80 * Redistribution and use in source and binary forms, with or without
81 * modification, are permitted provided that the following conditions
83 * 1. Redistributions of source code must retain the copyright
84 * notice, this list of conditions and the following disclaimer.
85 * 2. Redistributions in binary form must reproduce the above copyright
86 * notice, this list of conditions and the following disclaimer in the
87 * documentation and/or other materials provided with the distribution.
88 * 3. All advertising materials mentioning features or use of this software
89 * must display the following acknowledgement:
90 * "This product includes cryptographic software written by
91 * Eric Young (eay@cryptsoft.com)"
92 * The word 'cryptographic' can be left out if the rouines from the library
93 * being used are not cryptographic related :-).
94 * 4. If you include any Windows specific code (or a derivative thereof) from
95 * the apps directory (application code) you must include an acknowledgement:
96 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
98 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
101 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
110 * The licence and distribution terms for any publically available version or
111 * derivative of this code cannot be changed. i.e. this code cannot simply be
112 * copied and put under another distribution licence
113 * [including the GNU Public Licence.]
117 #include "ssl_locl.h"
118 #include <openssl/buffer.h>
119 #include <openssl/rand.h>
120 #include <openssl/objects.h>
121 #include <openssl/evp.h>
122 #include <openssl/md5.h>
123 #include <openssl/bn.h>
124 #ifndef OPENSSL_NO_DH
125 # include <openssl/dh.h>
128 static const SSL_METHOD *dtls1_get_client_method(int ver);
129 static int dtls1_get_hello_verify(SSL *s);
131 static const SSL_METHOD *dtls1_get_client_method(int ver)
133 if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
134 return (DTLSv1_client_method());
135 else if (ver == DTLS1_2_VERSION)
136 return (DTLSv1_2_client_method());
141 IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
142 DTLSv1_client_method,
143 ssl_undefined_function,
145 dtls1_get_client_method, DTLSv1_enc_data)
147 IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
148 DTLSv1_2_client_method,
149 ssl_undefined_function,
151 dtls1_get_client_method, DTLSv1_2_enc_data)
153 IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
155 ssl_undefined_function,
157 dtls1_get_client_method, DTLSv1_2_enc_data)
159 int dtls1_connect(SSL *s)
162 unsigned long Time = (unsigned long)time(NULL);
163 void (*cb) (const SSL *ssl, int type, int val) = NULL;
165 int new_state, state, skip = 0;
166 #ifndef OPENSSL_NO_SCTP
167 unsigned char sctpauthkey[64];
168 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
171 RAND_add(&Time, sizeof(Time), 0);
175 if (s->info_callback != NULL)
176 cb = s->info_callback;
177 else if (s->ctx->info_callback != NULL)
178 cb = s->ctx->info_callback;
181 if (!SSL_in_init(s) || SSL_in_before(s)) {
186 #ifndef OPENSSL_NO_SCTP
188 * Notify SCTP BIO socket to enter handshake mode and prevent stream
189 * identifier other than 0. Will be ignored if no SCTP is used.
191 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
192 s->in_handshake, NULL);
195 #ifndef OPENSSL_NO_HEARTBEATS
197 * If we're awaiting a HeartbeatResponse, pretend we already got and
198 * don't await it anymore, because Heartbeats don't make sense during
201 if (s->tlsext_hb_pending) {
203 s->tlsext_hb_pending = 0;
212 case SSL_ST_RENEGOTIATE:
214 s->state = SSL_ST_CONNECT;
215 s->ctx->stats.sess_connect_renegotiate++;
219 case SSL_ST_BEFORE | SSL_ST_CONNECT:
220 case SSL_ST_OK | SSL_ST_CONNECT:
224 cb(s, SSL_CB_HANDSHAKE_START, 1);
226 if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
227 (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00)) {
228 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
230 s->state = SSL_ST_ERR;
234 /* s->version=SSL3_VERSION; */
235 s->type = SSL_ST_CONNECT;
237 if (s->init_buf == NULL) {
238 if ((buf = BUF_MEM_new()) == NULL) {
240 s->state = SSL_ST_ERR;
243 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
245 s->state = SSL_ST_ERR;
252 if (!ssl3_setup_buffers(s)) {
254 s->state = SSL_ST_ERR;
258 /* setup buffing BIO */
259 if (!ssl_init_wbio_buffer(s, 0)) {
261 s->state = SSL_ST_ERR;
265 /* don't push the buffering BIO quite yet */
267 s->state = SSL3_ST_CW_CLNT_HELLO_A;
268 s->ctx->stats.sess_connect++;
270 /* mark client_random uninitialized */
271 memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
272 s->d1->send_cookie = 0;
275 * Should have been reset by ssl3_get_finished, too.
277 s->s3->change_cipher_spec = 0;
280 #ifndef OPENSSL_NO_SCTP
281 case DTLS1_SCTP_ST_CR_READ_SOCK:
283 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
284 s->s3->in_read_app_data = 2;
285 s->rwstate = SSL_READING;
286 BIO_clear_retry_flags(SSL_get_rbio(s));
287 BIO_set_retry_read(SSL_get_rbio(s));
292 s->state = s->s3->tmp.next_state;
295 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
296 /* read app data until dry event */
298 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
303 s->s3->in_read_app_data = 2;
304 s->rwstate = SSL_READING;
305 BIO_clear_retry_flags(SSL_get_rbio(s));
306 BIO_set_retry_read(SSL_get_rbio(s));
311 s->state = s->d1->next_state;
315 case SSL3_ST_CW_CLNT_HELLO_A:
316 case SSL3_ST_CW_CLNT_HELLO_B:
320 /* every DTLS ClientHello resets Finished MAC */
321 ssl3_init_finished_mac(s);
323 dtls1_start_timer(s);
324 ret = ssl3_client_hello(s);
328 if (s->d1->send_cookie) {
329 s->state = SSL3_ST_CW_FLUSH;
330 s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
332 s->state = SSL3_ST_CR_SRVR_HELLO_A;
336 #ifndef OPENSSL_NO_SCTP
337 /* Disable buffering for SCTP */
338 if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
341 * turn on buffering for the next lot of output
343 if (s->bbio != s->wbio)
344 s->wbio = BIO_push(s->bbio, s->wbio);
345 #ifndef OPENSSL_NO_SCTP
351 case SSL3_ST_CR_SRVR_HELLO_A:
352 case SSL3_ST_CR_SRVR_HELLO_B:
353 ret = ssl3_get_server_hello(s);
358 #ifndef OPENSSL_NO_SCTP
360 * Add new shared key for SCTP-Auth, will be ignored if
363 snprintf((char *)labelbuffer,
364 sizeof(DTLS1_SCTP_AUTH_LABEL),
365 DTLS1_SCTP_AUTH_LABEL);
367 SSL_export_keying_material(s, sctpauthkey,
370 sizeof(labelbuffer), NULL, 0,
373 BIO_ctrl(SSL_get_wbio(s),
374 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
375 sizeof(sctpauthkey), sctpauthkey);
378 s->state = SSL3_ST_CR_CHANGE_A;
380 s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
385 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
386 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
388 ret = dtls1_get_hello_verify(s);
392 if (s->d1->send_cookie) /* start again, with a cookie */
393 s->state = SSL3_ST_CW_CLNT_HELLO_A;
395 s->state = SSL3_ST_CR_CERT_A;
399 case SSL3_ST_CR_CERT_A:
400 case SSL3_ST_CR_CERT_B:
401 /* Check if it is anon DH or PSK */
402 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
403 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
404 ret = ssl3_get_server_certificate(s);
408 if (s->tlsext_status_expected)
409 s->state = SSL3_ST_CR_CERT_STATUS_A;
411 s->state = SSL3_ST_CR_KEY_EXCH_A;
414 s->state = SSL3_ST_CR_KEY_EXCH_A;
420 case SSL3_ST_CR_KEY_EXCH_A:
421 case SSL3_ST_CR_KEY_EXCH_B:
422 ret = ssl3_get_key_exchange(s);
425 s->state = SSL3_ST_CR_CERT_REQ_A;
429 * at this point we check that we have the required stuff from
432 if (!ssl3_check_cert_and_algorithm(s)) {
434 s->state = SSL_ST_ERR;
439 case SSL3_ST_CR_CERT_REQ_A:
440 case SSL3_ST_CR_CERT_REQ_B:
441 ret = ssl3_get_certificate_request(s);
444 s->state = SSL3_ST_CR_SRVR_DONE_A;
448 case SSL3_ST_CR_SRVR_DONE_A:
449 case SSL3_ST_CR_SRVR_DONE_B:
450 ret = ssl3_get_server_done(s);
454 if (s->s3->tmp.cert_req)
455 s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
457 s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
460 #ifndef OPENSSL_NO_SCTP
461 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
462 state == SSL_ST_RENEGOTIATE)
463 s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
466 s->state = s->s3->tmp.next_state;
469 case SSL3_ST_CW_CERT_A:
470 case SSL3_ST_CW_CERT_B:
471 case SSL3_ST_CW_CERT_C:
472 case SSL3_ST_CW_CERT_D:
473 dtls1_start_timer(s);
474 ret = ssl3_send_client_certificate(s);
477 s->state = SSL3_ST_CW_KEY_EXCH_A;
481 case SSL3_ST_CW_KEY_EXCH_A:
482 case SSL3_ST_CW_KEY_EXCH_B:
483 dtls1_start_timer(s);
484 ret = ssl3_send_client_key_exchange(s);
488 #ifndef OPENSSL_NO_SCTP
490 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
493 snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
494 DTLS1_SCTP_AUTH_LABEL);
496 SSL_export_keying_material(s, sctpauthkey,
497 sizeof(sctpauthkey), labelbuffer,
498 sizeof(labelbuffer), NULL, 0, 0);
500 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
501 sizeof(sctpauthkey), sctpauthkey);
505 * EAY EAY EAY need to check for DH fix cert sent back
508 * For TLS, cert_req is set to 2, so a cert chain of nothing is
509 * sent, but no verify packet is sent
511 if (s->s3->tmp.cert_req == 1) {
512 s->state = SSL3_ST_CW_CERT_VRFY_A;
514 #ifndef OPENSSL_NO_SCTP
515 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
516 s->d1->next_state = SSL3_ST_CW_CHANGE_A;
517 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
520 s->state = SSL3_ST_CW_CHANGE_A;
526 case SSL3_ST_CW_CERT_VRFY_A:
527 case SSL3_ST_CW_CERT_VRFY_B:
528 dtls1_start_timer(s);
529 ret = ssl3_send_client_verify(s);
532 #ifndef OPENSSL_NO_SCTP
533 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
534 s->d1->next_state = SSL3_ST_CW_CHANGE_A;
535 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
538 s->state = SSL3_ST_CW_CHANGE_A;
542 case SSL3_ST_CW_CHANGE_A:
543 case SSL3_ST_CW_CHANGE_B:
545 dtls1_start_timer(s);
546 ret = dtls1_send_change_cipher_spec(s,
548 SSL3_ST_CW_CHANGE_B);
552 s->state = SSL3_ST_CW_FINISHED_A;
555 s->session->cipher = s->s3->tmp.new_cipher;
556 #ifdef OPENSSL_NO_COMP
557 s->session->compress_meth = 0;
559 if (s->s3->tmp.new_compression == NULL)
560 s->session->compress_meth = 0;
562 s->session->compress_meth = s->s3->tmp.new_compression->id;
564 if (!s->method->ssl3_enc->setup_key_block(s)) {
566 s->state = SSL_ST_ERR;
570 if (!s->method->ssl3_enc->change_cipher_state(s,
571 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
574 s->state = SSL_ST_ERR;
577 #ifndef OPENSSL_NO_SCTP
580 * Change to new shared key of SCTP-Auth, will be ignored if
583 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
588 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
591 case SSL3_ST_CW_FINISHED_A:
592 case SSL3_ST_CW_FINISHED_B:
594 dtls1_start_timer(s);
595 ret = ssl3_send_finished(s,
596 SSL3_ST_CW_FINISHED_A,
597 SSL3_ST_CW_FINISHED_B,
599 ssl3_enc->client_finished_label,
601 ssl3_enc->client_finished_label_len);
604 s->state = SSL3_ST_CW_FLUSH;
607 s->s3->tmp.next_state = SSL_ST_OK;
608 #ifndef OPENSSL_NO_SCTP
609 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
610 s->d1->next_state = s->s3->tmp.next_state;
611 s->s3->tmp.next_state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
615 #ifndef OPENSSL_NO_SCTP
617 * Change to new shared key of SCTP-Auth, will be ignored if
620 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
625 * Allow NewSessionTicket if ticket expected
627 if (s->tlsext_ticket_expected)
628 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
630 s->s3->tmp.next_state = SSL3_ST_CR_CHANGE_A;
635 case SSL3_ST_CR_SESSION_TICKET_A:
636 case SSL3_ST_CR_SESSION_TICKET_B:
637 ret = ssl3_get_new_session_ticket(s);
640 s->state = SSL3_ST_CR_CHANGE_A;
644 case SSL3_ST_CR_CERT_STATUS_A:
645 case SSL3_ST_CR_CERT_STATUS_B:
646 ret = ssl3_get_cert_status(s);
649 s->state = SSL3_ST_CR_KEY_EXCH_A;
653 case SSL3_ST_CR_CHANGE_A:
654 case SSL3_ST_CR_CHANGE_B:
655 ret = ssl3_get_change_cipher_spec(s, SSL3_ST_CR_CHANGE_A,
656 SSL3_ST_CR_CHANGE_B);
660 s->state = SSL3_ST_CR_FINISHED_A;
664 case SSL3_ST_CR_FINISHED_A:
665 case SSL3_ST_CR_FINISHED_B:
666 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
667 SSL3_ST_CR_FINISHED_B);
673 s->state = SSL3_ST_CW_CHANGE_A;
675 s->state = SSL_ST_OK;
677 #ifndef OPENSSL_NO_SCTP
678 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
679 state == SSL_ST_RENEGOTIATE) {
680 s->d1->next_state = s->state;
681 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
688 case SSL3_ST_CW_FLUSH:
689 s->rwstate = SSL_WRITING;
690 if (BIO_flush(s->wbio) <= 0) {
692 * If the write error was fatal, stop trying
694 if (!BIO_should_retry(s->wbio)) {
695 s->rwstate = SSL_NOTHING;
696 s->state = s->s3->tmp.next_state;
702 s->rwstate = SSL_NOTHING;
703 s->state = s->s3->tmp.next_state;
707 /* clean a few things up */
708 ssl3_cleanup_key_block(s);
710 /* Remove the buffering */
711 ssl_free_wbio_buffer(s);
717 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
719 s->ctx->stats.sess_hit++;
723 s->handshake_func = dtls1_connect;
724 s->ctx->stats.sess_connect_good++;
727 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
729 /* done with handshaking */
730 s->d1->handshake_read_seq = 0;
731 s->d1->next_handshake_write_seq = 0;
737 SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE);
743 /* did we do anything */
744 if (!s->s3->tmp.reuse_message && !skip) {
746 if ((ret = BIO_flush(s->wbio)) <= 0)
750 if ((cb != NULL) && (s->state != state)) {
751 new_state = s->state;
753 cb(s, SSL_CB_CONNECT_LOOP, 1);
754 s->state = new_state;
762 #ifndef OPENSSL_NO_SCTP
764 * Notify SCTP BIO socket to leave handshake mode and allow stream
765 * identifier other than 0. Will be ignored if no SCTP is used.
767 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
768 s->in_handshake, NULL);
773 cb(s, SSL_CB_CONNECT_EXIT, ret);
777 static int dtls1_get_hello_verify(SSL *s)
781 unsigned int cookie_len;
784 n = s->method->ssl_get_message(s,
785 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
786 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
787 -1, s->max_cert_list, &ok);
793 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
794 s->d1->send_cookie = 0;
795 s->s3->tmp.reuse_message = 1;
799 data = (unsigned char *)s->init_msg;
802 cookie_len = *(data++);
803 if (cookie_len > sizeof(s->d1->cookie)) {
804 al = SSL_AD_ILLEGAL_PARAMETER;
808 memcpy(s->d1->cookie, data, cookie_len);
809 s->d1->cookie_len = cookie_len;
811 s->d1->send_cookie = 1;
815 ssl3_send_alert(s, SSL3_AL_FATAL, al);
816 s->state = SSL_ST_ERR;