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;
274 s->d1->change_cipher_spec_ok = 0;
276 * Should have been reset by ssl3_get_finished, too.
278 s->s3->change_cipher_spec = 0;
281 #ifndef OPENSSL_NO_SCTP
282 case DTLS1_SCTP_ST_CR_READ_SOCK:
284 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
285 s->s3->in_read_app_data = 2;
286 s->rwstate = SSL_READING;
287 BIO_clear_retry_flags(SSL_get_rbio(s));
288 BIO_set_retry_read(SSL_get_rbio(s));
293 s->state = s->s3->tmp.next_state;
296 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
297 /* read app data until dry event */
299 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
304 s->s3->in_read_app_data = 2;
305 s->rwstate = SSL_READING;
306 BIO_clear_retry_flags(SSL_get_rbio(s));
307 BIO_set_retry_read(SSL_get_rbio(s));
312 s->state = s->d1->next_state;
316 case SSL3_ST_CW_CLNT_HELLO_A:
317 case SSL3_ST_CW_CLNT_HELLO_B:
321 /* every DTLS ClientHello resets Finished MAC */
322 ssl3_init_finished_mac(s);
324 dtls1_start_timer(s);
325 ret = ssl3_client_hello(s);
329 if (s->d1->send_cookie) {
330 s->state = SSL3_ST_CW_FLUSH;
331 s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
333 s->state = SSL3_ST_CR_SRVR_HELLO_A;
337 #ifndef OPENSSL_NO_SCTP
338 /* Disable buffering for SCTP */
339 if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
342 * turn on buffering for the next lot of output
344 if (s->bbio != s->wbio)
345 s->wbio = BIO_push(s->bbio, s->wbio);
346 #ifndef OPENSSL_NO_SCTP
352 case SSL3_ST_CR_SRVR_HELLO_A:
353 case SSL3_ST_CR_SRVR_HELLO_B:
354 ret = ssl3_get_server_hello(s);
359 #ifndef OPENSSL_NO_SCTP
361 * Add new shared key for SCTP-Auth, will be ignored if
364 snprintf((char *)labelbuffer,
365 sizeof(DTLS1_SCTP_AUTH_LABEL),
366 DTLS1_SCTP_AUTH_LABEL);
368 SSL_export_keying_material(s, sctpauthkey,
371 sizeof(labelbuffer), NULL, 0,
374 BIO_ctrl(SSL_get_wbio(s),
375 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
376 sizeof(sctpauthkey), sctpauthkey);
379 s->state = SSL3_ST_CR_FINISHED_A;
381 s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
386 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
387 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
389 ret = dtls1_get_hello_verify(s);
393 if (s->d1->send_cookie) /* start again, with a cookie */
394 s->state = SSL3_ST_CW_CLNT_HELLO_A;
396 s->state = SSL3_ST_CR_CERT_A;
400 case SSL3_ST_CR_CERT_A:
401 case SSL3_ST_CR_CERT_B:
402 /* Check if it is anon DH or PSK */
403 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
404 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
405 ret = ssl3_get_server_certificate(s);
408 #ifndef OPENSSL_NO_TLSEXT
409 if (s->tlsext_status_expected)
410 s->state = SSL3_ST_CR_CERT_STATUS_A;
412 s->state = SSL3_ST_CR_KEY_EXCH_A;
415 s->state = SSL3_ST_CR_KEY_EXCH_A;
421 s->state = SSL3_ST_CR_KEY_EXCH_A;
426 case SSL3_ST_CR_KEY_EXCH_A:
427 case SSL3_ST_CR_KEY_EXCH_B:
428 ret = ssl3_get_key_exchange(s);
431 s->state = SSL3_ST_CR_CERT_REQ_A;
435 * at this point we check that we have the required stuff from
438 if (!ssl3_check_cert_and_algorithm(s)) {
440 s->state = SSL_ST_ERR;
445 case SSL3_ST_CR_CERT_REQ_A:
446 case SSL3_ST_CR_CERT_REQ_B:
447 ret = ssl3_get_certificate_request(s);
450 s->state = SSL3_ST_CR_SRVR_DONE_A;
454 case SSL3_ST_CR_SRVR_DONE_A:
455 case SSL3_ST_CR_SRVR_DONE_B:
456 ret = ssl3_get_server_done(s);
460 if (s->s3->tmp.cert_req)
461 s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
463 s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
466 #ifndef OPENSSL_NO_SCTP
467 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
468 state == SSL_ST_RENEGOTIATE)
469 s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
472 s->state = s->s3->tmp.next_state;
475 case SSL3_ST_CW_CERT_A:
476 case SSL3_ST_CW_CERT_B:
477 case SSL3_ST_CW_CERT_C:
478 case SSL3_ST_CW_CERT_D:
479 dtls1_start_timer(s);
480 ret = ssl3_send_client_certificate(s);
483 s->state = SSL3_ST_CW_KEY_EXCH_A;
487 case SSL3_ST_CW_KEY_EXCH_A:
488 case SSL3_ST_CW_KEY_EXCH_B:
489 dtls1_start_timer(s);
490 ret = ssl3_send_client_key_exchange(s);
494 #ifndef OPENSSL_NO_SCTP
496 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
499 snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
500 DTLS1_SCTP_AUTH_LABEL);
502 SSL_export_keying_material(s, sctpauthkey,
503 sizeof(sctpauthkey), labelbuffer,
504 sizeof(labelbuffer), NULL, 0, 0);
506 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
507 sizeof(sctpauthkey), sctpauthkey);
511 * EAY EAY EAY need to check for DH fix cert sent back
514 * For TLS, cert_req is set to 2, so a cert chain of nothing is
515 * sent, but no verify packet is sent
517 if (s->s3->tmp.cert_req == 1) {
518 s->state = SSL3_ST_CW_CERT_VRFY_A;
520 #ifndef OPENSSL_NO_SCTP
521 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
522 s->d1->next_state = SSL3_ST_CW_CHANGE_A;
523 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
526 s->state = SSL3_ST_CW_CHANGE_A;
532 case SSL3_ST_CW_CERT_VRFY_A:
533 case SSL3_ST_CW_CERT_VRFY_B:
534 dtls1_start_timer(s);
535 ret = ssl3_send_client_verify(s);
538 #ifndef OPENSSL_NO_SCTP
539 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
540 s->d1->next_state = SSL3_ST_CW_CHANGE_A;
541 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
544 s->state = SSL3_ST_CW_CHANGE_A;
548 case SSL3_ST_CW_CHANGE_A:
549 case SSL3_ST_CW_CHANGE_B:
551 dtls1_start_timer(s);
552 ret = dtls1_send_change_cipher_spec(s,
554 SSL3_ST_CW_CHANGE_B);
558 s->state = SSL3_ST_CW_FINISHED_A;
561 s->session->cipher = s->s3->tmp.new_cipher;
562 #ifdef OPENSSL_NO_COMP
563 s->session->compress_meth = 0;
565 if (s->s3->tmp.new_compression == NULL)
566 s->session->compress_meth = 0;
568 s->session->compress_meth = s->s3->tmp.new_compression->id;
570 if (!s->method->ssl3_enc->setup_key_block(s)) {
572 s->state = SSL_ST_ERR;
576 if (!s->method->ssl3_enc->change_cipher_state(s,
577 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
580 s->state = SSL_ST_ERR;
583 #ifndef OPENSSL_NO_SCTP
586 * Change to new shared key of SCTP-Auth, will be ignored if
589 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
594 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
597 case SSL3_ST_CW_FINISHED_A:
598 case SSL3_ST_CW_FINISHED_B:
600 dtls1_start_timer(s);
601 ret = ssl3_send_finished(s,
602 SSL3_ST_CW_FINISHED_A,
603 SSL3_ST_CW_FINISHED_B,
605 ssl3_enc->client_finished_label,
607 ssl3_enc->client_finished_label_len);
610 s->state = SSL3_ST_CW_FLUSH;
613 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
615 s->s3->tmp.next_state = SSL_ST_OK;
616 #ifndef OPENSSL_NO_SCTP
617 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
618 s->d1->next_state = s->s3->tmp.next_state;
619 s->s3->tmp.next_state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
622 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
623 s->state = SSL_ST_OK;
624 #ifndef OPENSSL_NO_SCTP
625 if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
626 s->d1->next_state = SSL_ST_OK;
627 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
630 s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
631 s->s3->delay_buf_pop_ret = 0;
634 #ifndef OPENSSL_NO_SCTP
636 * Change to new shared key of SCTP-Auth, will be ignored if
639 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
643 #ifndef OPENSSL_NO_TLSEXT
645 * Allow NewSessionTicket if ticket expected
647 if (s->tlsext_ticket_expected)
648 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
652 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
657 #ifndef OPENSSL_NO_TLSEXT
658 case SSL3_ST_CR_SESSION_TICKET_A:
659 case SSL3_ST_CR_SESSION_TICKET_B:
660 ret = ssl3_get_new_session_ticket(s);
663 s->state = SSL3_ST_CR_FINISHED_A;
667 case SSL3_ST_CR_CERT_STATUS_A:
668 case SSL3_ST_CR_CERT_STATUS_B:
669 ret = ssl3_get_cert_status(s);
672 s->state = SSL3_ST_CR_KEY_EXCH_A;
677 case SSL3_ST_CR_FINISHED_A:
678 case SSL3_ST_CR_FINISHED_B:
679 s->d1->change_cipher_spec_ok = 1;
680 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
681 SSL3_ST_CR_FINISHED_B);
687 s->state = SSL3_ST_CW_CHANGE_A;
689 s->state = SSL_ST_OK;
691 #ifndef OPENSSL_NO_SCTP
692 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
693 state == SSL_ST_RENEGOTIATE) {
694 s->d1->next_state = s->state;
695 s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
702 case SSL3_ST_CW_FLUSH:
703 s->rwstate = SSL_WRITING;
704 if (BIO_flush(s->wbio) <= 0) {
706 * If the write error was fatal, stop trying
708 if (!BIO_should_retry(s->wbio)) {
709 s->rwstate = SSL_NOTHING;
710 s->state = s->s3->tmp.next_state;
716 s->rwstate = SSL_NOTHING;
717 s->state = s->s3->tmp.next_state;
721 /* clean a few things up */
722 ssl3_cleanup_key_block(s);
725 * If we are not 'joining' the last two packets, remove the
728 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
729 ssl_free_wbio_buffer(s);
730 /* else do it later in ssl3_write */
736 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
738 s->ctx->stats.sess_hit++;
742 s->handshake_func = dtls1_connect;
743 s->ctx->stats.sess_connect_good++;
746 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
748 /* done with handshaking */
749 s->d1->handshake_read_seq = 0;
750 s->d1->next_handshake_write_seq = 0;
756 SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE);
762 /* did we do anything */
763 if (!s->s3->tmp.reuse_message && !skip) {
765 if ((ret = BIO_flush(s->wbio)) <= 0)
769 if ((cb != NULL) && (s->state != state)) {
770 new_state = s->state;
772 cb(s, SSL_CB_CONNECT_LOOP, 1);
773 s->state = new_state;
781 #ifndef OPENSSL_NO_SCTP
783 * Notify SCTP BIO socket to leave handshake mode and allow stream
784 * identifier other than 0. Will be ignored if no SCTP is used.
786 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
787 s->in_handshake, NULL);
792 cb(s, SSL_CB_CONNECT_EXIT, ret);
796 static int dtls1_get_hello_verify(SSL *s)
800 unsigned int cookie_len;
803 n = s->method->ssl_get_message(s,
804 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
805 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
806 -1, s->max_cert_list, &ok);
812 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
813 s->d1->send_cookie = 0;
814 s->s3->tmp.reuse_message = 1;
818 data = (unsigned char *)s->init_msg;
821 cookie_len = *(data++);
822 if (cookie_len > sizeof(s->d1->cookie)) {
823 al = SSL_AD_ILLEGAL_PARAMETER;
827 memcpy(s->d1->cookie, data, cookie_len);
828 s->d1->cookie_len = cookie_len;
830 s->d1->send_cookie = 1;
834 ssl3_send_alert(s, SSL3_AL_FATAL, al);
835 s->state = SSL_ST_ERR;