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 #ifndef OPENSSL_NO_KRB5
119 #include "kssl_lcl.h"
121 #include <openssl/buffer.h>
122 #include <openssl/rand.h>
123 #include <openssl/objects.h>
124 #include <openssl/evp.h>
125 #include <openssl/md5.h>
126 #include <openssl/bn.h>
127 #ifndef OPENSSL_NO_DH
128 #include <openssl/dh.h>
131 static const SSL_METHOD *dtls1_get_client_method(int ver);
132 static int dtls1_get_hello_verify(SSL *s);
134 static const SSL_METHOD *dtls1_get_client_method(int ver)
136 if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
137 return(DTLSv1_client_method());
142 IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
143 DTLSv1_client_method,
144 ssl_undefined_function,
146 dtls1_get_client_method,
149 int dtls1_connect(SSL *s)
152 unsigned long Time=(unsigned long)time(NULL);
153 void (*cb)(const SSL *ssl,int type,int val)=NULL;
155 int new_state,state,skip=0;
156 #ifndef OPENSSL_NO_SCTP
157 unsigned char sctpauthkey[64];
158 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
161 RAND_add(&Time,sizeof(Time),0);
165 if (s->info_callback != NULL)
167 else if (s->ctx->info_callback != NULL)
168 cb=s->ctx->info_callback;
171 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
173 #ifndef OPENSSL_NO_SCTP
174 /* Notify SCTP BIO socket to enter handshake
175 * mode and prevent stream identifier other
176 * than 0. Will be ignored if no SCTP is used.
178 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
181 #ifndef OPENSSL_NO_HEARTBEATS
182 /* If we're awaiting a HeartbeatResponse, pretend we
183 * already got and don't await it anymore, because
184 * Heartbeats don't make sense during handshakes anyway.
186 if (s->tlsext_hb_pending)
189 s->tlsext_hb_pending = 0;
200 case SSL_ST_RENEGOTIATE:
202 s->state=SSL_ST_CONNECT;
203 s->ctx->stats.sess_connect_renegotiate++;
207 case SSL_ST_BEFORE|SSL_ST_CONNECT:
208 case SSL_ST_OK|SSL_ST_CONNECT:
211 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
213 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
214 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
216 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
221 /* s->version=SSL3_VERSION; */
222 s->type=SSL_ST_CONNECT;
224 if (s->init_buf == NULL)
226 if ((buf=BUF_MEM_new()) == NULL)
231 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
240 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
242 /* setup buffing BIO */
243 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
245 /* don't push the buffering BIO quite yet */
247 s->state=SSL3_ST_CW_CLNT_HELLO_A;
248 s->ctx->stats.sess_connect++;
250 /* mark client_random uninitialized */
251 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
252 s->d1->send_cookie = 0;
256 #ifndef OPENSSL_NO_SCTP
257 case DTLS1_SCTP_ST_CR_READ_SOCK:
259 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
261 s->s3->in_read_app_data=2;
262 s->rwstate=SSL_READING;
263 BIO_clear_retry_flags(SSL_get_rbio(s));
264 BIO_set_retry_read(SSL_get_rbio(s));
269 s->state=s->s3->tmp.next_state;
272 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
273 /* read app data until dry event */
275 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
276 if (ret < 0) goto end;
280 s->s3->in_read_app_data=2;
281 s->rwstate=SSL_READING;
282 BIO_clear_retry_flags(SSL_get_rbio(s));
283 BIO_set_retry_read(SSL_get_rbio(s));
288 s->state=s->d1->next_state;
292 case SSL3_ST_CW_CLNT_HELLO_A:
293 case SSL3_ST_CW_CLNT_HELLO_B:
297 /* every DTLS ClientHello resets Finished MAC */
298 ssl3_init_finished_mac(s);
300 dtls1_start_timer(s);
301 ret=ssl3_client_hello(s);
302 if (ret <= 0) goto end;
304 if ( s->d1->send_cookie)
306 s->state=SSL3_ST_CW_FLUSH;
307 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
310 s->state=SSL3_ST_CR_SRVR_HELLO_A;
314 #ifndef OPENSSL_NO_SCTP
315 /* Disable buffering for SCTP */
316 if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
319 /* turn on buffering for the next lot of output */
320 if (s->bbio != s->wbio)
321 s->wbio=BIO_push(s->bbio,s->wbio);
322 #ifndef OPENSSL_NO_SCTP
328 case SSL3_ST_CR_SRVR_HELLO_A:
329 case SSL3_ST_CR_SRVR_HELLO_B:
330 ret=ssl3_get_server_hello(s);
331 if (ret <= 0) goto end;
336 #ifndef OPENSSL_NO_SCTP
337 /* Add new shared key for SCTP-Auth,
338 * will be ignored if no SCTP used.
340 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
341 DTLS1_SCTP_AUTH_LABEL);
343 SSL_export_keying_material(s, sctpauthkey,
344 sizeof(sctpauthkey), labelbuffer,
345 sizeof(labelbuffer), NULL, 0, 0);
347 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
348 sizeof(sctpauthkey), sctpauthkey);
351 s->state=SSL3_ST_CR_FINISHED_A;
354 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
359 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
360 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
362 ret = dtls1_get_hello_verify(s);
366 if ( s->d1->send_cookie) /* start again, with a cookie */
367 s->state=SSL3_ST_CW_CLNT_HELLO_A;
369 s->state = SSL3_ST_CR_CERT_A;
373 case SSL3_ST_CR_CERT_A:
374 case SSL3_ST_CR_CERT_B:
375 #ifndef OPENSSL_NO_TLSEXT
376 ret=ssl3_check_finished(s);
377 if (ret <= 0) goto end;
381 if (s->tlsext_ticket_expected)
382 s->state=SSL3_ST_CR_SESSION_TICKET_A;
384 s->state=SSL3_ST_CR_FINISHED_A;
389 /* Check if it is anon DH or PSK */
390 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
391 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
393 ret=ssl3_get_server_certificate(s);
394 if (ret <= 0) goto end;
395 #ifndef OPENSSL_NO_TLSEXT
396 if (s->tlsext_status_expected)
397 s->state=SSL3_ST_CR_CERT_STATUS_A;
399 s->state=SSL3_ST_CR_KEY_EXCH_A;
404 s->state=SSL3_ST_CR_KEY_EXCH_A;
411 s->state=SSL3_ST_CR_KEY_EXCH_A;
416 case SSL3_ST_CR_KEY_EXCH_A:
417 case SSL3_ST_CR_KEY_EXCH_B:
418 ret=ssl3_get_key_exchange(s);
419 if (ret <= 0) goto end;
420 s->state=SSL3_ST_CR_CERT_REQ_A;
423 /* at this point we check that we have the
424 * required stuff from the server */
425 if (!ssl3_check_cert_and_algorithm(s))
432 case SSL3_ST_CR_CERT_REQ_A:
433 case SSL3_ST_CR_CERT_REQ_B:
434 ret=ssl3_get_certificate_request(s);
435 if (ret <= 0) goto end;
436 s->state=SSL3_ST_CR_SRVR_DONE_A;
440 case SSL3_ST_CR_SRVR_DONE_A:
441 case SSL3_ST_CR_SRVR_DONE_B:
442 ret=ssl3_get_server_done(s);
443 if (ret <= 0) goto end;
445 if (s->s3->tmp.cert_req)
446 s->s3->tmp.next_state=SSL3_ST_CW_CERT_A;
448 s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A;
451 #ifndef OPENSSL_NO_SCTP
452 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
453 state == SSL_ST_RENEGOTIATE)
454 s->state=DTLS1_SCTP_ST_CR_READ_SOCK;
457 s->state=s->s3->tmp.next_state;
460 case SSL3_ST_CW_CERT_A:
461 case SSL3_ST_CW_CERT_B:
462 case SSL3_ST_CW_CERT_C:
463 case SSL3_ST_CW_CERT_D:
464 dtls1_start_timer(s);
465 ret=ssl3_send_client_certificate(s);
466 if (ret <= 0) goto end;
467 s->state=SSL3_ST_CW_KEY_EXCH_A;
471 case SSL3_ST_CW_KEY_EXCH_A:
472 case SSL3_ST_CW_KEY_EXCH_B:
473 dtls1_start_timer(s);
474 ret=ssl3_send_client_key_exchange(s);
475 if (ret <= 0) goto end;
477 #ifndef OPENSSL_NO_SCTP
478 /* Add new shared key for SCTP-Auth,
479 * will be ignored if no SCTP used.
481 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
482 DTLS1_SCTP_AUTH_LABEL);
484 SSL_export_keying_material(s, sctpauthkey,
485 sizeof(sctpauthkey), labelbuffer,
486 sizeof(labelbuffer), NULL, 0, 0);
488 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
489 sizeof(sctpauthkey), sctpauthkey);
492 /* EAY EAY EAY need to check for DH fix cert
494 /* For TLS, cert_req is set to 2, so a cert chain
495 * of nothing is sent, but no verify packet is sent */
496 if (s->s3->tmp.cert_req == 1)
498 s->state=SSL3_ST_CW_CERT_VRFY_A;
502 #ifndef OPENSSL_NO_SCTP
503 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
505 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
506 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
510 s->state=SSL3_ST_CW_CHANGE_A;
511 s->s3->change_cipher_spec=0;
517 case SSL3_ST_CW_CERT_VRFY_A:
518 case SSL3_ST_CW_CERT_VRFY_B:
519 dtls1_start_timer(s);
520 ret=ssl3_send_client_verify(s);
521 if (ret <= 0) goto end;
522 #ifndef OPENSSL_NO_SCTP
523 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
525 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
526 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
530 s->state=SSL3_ST_CW_CHANGE_A;
532 s->s3->change_cipher_spec=0;
535 case SSL3_ST_CW_CHANGE_A:
536 case SSL3_ST_CW_CHANGE_B:
538 dtls1_start_timer(s);
539 ret=dtls1_send_change_cipher_spec(s,
540 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
541 if (ret <= 0) goto end;
543 #ifndef OPENSSL_NO_SCTP
544 /* Change to new shared key of SCTP-Auth,
545 * will be ignored if no SCTP used.
547 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
550 s->state=SSL3_ST_CW_FINISHED_A;
553 s->session->cipher=s->s3->tmp.new_cipher;
554 #ifdef OPENSSL_NO_COMP
555 s->session->compress_meth=0;
557 if (s->s3->tmp.new_compression == NULL)
558 s->session->compress_meth=0;
560 s->session->compress_meth=
561 s->s3->tmp.new_compression->id;
563 if (!s->method->ssl3_enc->setup_key_block(s))
569 if (!s->method->ssl3_enc->change_cipher_state(s,
570 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
576 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
579 case SSL3_ST_CW_FINISHED_A:
580 case SSL3_ST_CW_FINISHED_B:
582 dtls1_start_timer(s);
583 ret=ssl3_send_finished(s,
584 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
585 s->method->ssl3_enc->client_finished_label,
586 s->method->ssl3_enc->client_finished_label_len);
587 if (ret <= 0) goto end;
588 s->state=SSL3_ST_CW_FLUSH;
591 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
594 s->s3->tmp.next_state=SSL_ST_OK;
595 #ifndef OPENSSL_NO_SCTP
596 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
598 s->d1->next_state = s->s3->tmp.next_state;
599 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
602 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
605 #ifndef OPENSSL_NO_SCTP
606 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
608 s->d1->next_state = SSL_ST_OK;
609 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
612 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
613 s->s3->delay_buf_pop_ret=0;
618 #ifndef OPENSSL_NO_TLSEXT
619 /* Allow NewSessionTicket if ticket expected */
620 if (s->tlsext_ticket_expected)
621 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
625 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
630 #ifndef OPENSSL_NO_TLSEXT
631 case SSL3_ST_CR_SESSION_TICKET_A:
632 case SSL3_ST_CR_SESSION_TICKET_B:
633 ret=ssl3_get_new_session_ticket(s);
634 if (ret <= 0) goto end;
635 s->state=SSL3_ST_CR_FINISHED_A;
639 case SSL3_ST_CR_CERT_STATUS_A:
640 case SSL3_ST_CR_CERT_STATUS_B:
641 ret=ssl3_get_cert_status(s);
642 if (ret <= 0) goto end;
643 s->state=SSL3_ST_CR_KEY_EXCH_A;
648 case SSL3_ST_CR_FINISHED_A:
649 case SSL3_ST_CR_FINISHED_B:
650 s->d1->change_cipher_spec_ok = 1;
651 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
652 SSL3_ST_CR_FINISHED_B);
653 if (ret <= 0) goto end;
657 s->state=SSL3_ST_CW_CHANGE_A;
661 #ifndef OPENSSL_NO_SCTP
662 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
663 state == SSL_ST_RENEGOTIATE)
665 s->d1->next_state=s->state;
666 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
673 case SSL3_ST_CW_FLUSH:
674 s->rwstate=SSL_WRITING;
675 if (BIO_flush(s->wbio) <= 0)
677 /* If the write error was fatal, stop trying */
678 if (!BIO_should_retry(s->wbio))
680 s->rwstate=SSL_NOTHING;
681 s->state=s->s3->tmp.next_state;
687 s->rwstate=SSL_NOTHING;
688 s->state=s->s3->tmp.next_state;
692 /* clean a few things up */
693 ssl3_cleanup_key_block(s);
696 if (s->init_buf != NULL)
698 BUF_MEM_free(s->init_buf);
703 /* If we are not 'joining' the last two packets,
704 * remove the buffering now */
705 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
706 ssl_free_wbio_buffer(s);
707 /* else do it later in ssl3_write */
713 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
714 if (s->hit) s->ctx->stats.sess_hit++;
718 s->handshake_func=dtls1_connect;
719 s->ctx->stats.sess_connect_good++;
721 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
723 /* done with handshaking */
724 s->d1->handshake_read_seq = 0;
725 s->d1->next_handshake_write_seq = 0;
730 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
736 /* did we do anything */
737 if (!s->s3->tmp.reuse_message && !skip)
741 if ((ret=BIO_flush(s->wbio)) <= 0)
745 if ((cb != NULL) && (s->state != state))
749 cb(s,SSL_CB_CONNECT_LOOP,1);
758 #ifndef OPENSSL_NO_SCTP
759 /* Notify SCTP BIO socket to leave handshake
760 * mode and allow stream identifier other
761 * than 0. Will be ignored if no SCTP is used.
763 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
769 cb(s,SSL_CB_CONNECT_EXIT,ret);
773 static int dtls1_get_hello_verify(SSL *s)
777 unsigned int cookie_len;
779 n=s->method->ssl_get_message(s,
780 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
781 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
786 if (!ok) return((int)n);
788 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
790 s->d1->send_cookie = 0;
791 s->s3->tmp.reuse_message=1;
795 data = (unsigned char *)s->init_msg;
797 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
799 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
800 s->version=(s->version&0xff00)|data[1];
801 al = SSL_AD_PROTOCOL_VERSION;
806 cookie_len = *(data++);
807 if ( cookie_len > sizeof(s->d1->cookie))
809 al=SSL_AD_ILLEGAL_PARAMETER;
813 memcpy(s->d1->cookie, data, cookie_len);
814 s->d1->cookie_len = cookie_len;
816 s->d1->send_cookie = 1;
820 ssl3_send_alert(s, SSL3_AL_FATAL, al);