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());
138 else if (ver == DTLS1_2_VERSION)
139 return(DTLSv1_2_client_method());
144 IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
145 DTLSv1_client_method,
146 ssl_undefined_function,
148 dtls1_get_client_method,
151 IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
152 DTLSv1_2_client_method,
153 ssl_undefined_function,
155 dtls1_get_client_method,
158 int dtls1_connect(SSL *s)
161 unsigned long Time=(unsigned long)time(NULL);
162 void (*cb)(const SSL *ssl,int type,int val)=NULL;
164 int new_state,state,skip=0;
165 #ifndef OPENSSL_NO_SCTP
166 unsigned char sctpauthkey[64];
167 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
170 RAND_add(&Time,sizeof(Time),0);
174 if (s->info_callback != NULL)
176 else if (s->ctx->info_callback != NULL)
177 cb=s->ctx->info_callback;
180 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
182 #ifndef OPENSSL_NO_SCTP
183 /* Notify SCTP BIO socket to enter handshake
184 * mode and prevent stream identifier other
185 * than 0. Will be ignored if no SCTP is used.
187 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
190 #ifndef OPENSSL_NO_HEARTBEATS
191 /* If we're awaiting a HeartbeatResponse, pretend we
192 * already got and don't await it anymore, because
193 * Heartbeats don't make sense during handshakes anyway.
195 if (s->tlsext_hb_pending)
198 s->tlsext_hb_pending = 0;
209 case SSL_ST_RENEGOTIATE:
211 s->state=SSL_ST_CONNECT;
212 s->ctx->stats.sess_connect_renegotiate++;
216 case SSL_ST_BEFORE|SSL_ST_CONNECT:
217 case SSL_ST_OK|SSL_ST_CONNECT:
220 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
222 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
223 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
225 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
230 /* s->version=SSL3_VERSION; */
231 s->type=SSL_ST_CONNECT;
233 if (s->init_buf == NULL)
235 if ((buf=BUF_MEM_new()) == NULL)
240 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
249 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
251 /* setup buffing BIO */
252 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
254 /* don't push the buffering BIO quite yet */
256 s->state=SSL3_ST_CW_CLNT_HELLO_A;
257 s->ctx->stats.sess_connect++;
259 /* mark client_random uninitialized */
260 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
261 s->d1->send_cookie = 0;
265 #ifndef OPENSSL_NO_SCTP
266 case DTLS1_SCTP_ST_CR_READ_SOCK:
268 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
270 s->s3->in_read_app_data=2;
271 s->rwstate=SSL_READING;
272 BIO_clear_retry_flags(SSL_get_rbio(s));
273 BIO_set_retry_read(SSL_get_rbio(s));
278 s->state=s->s3->tmp.next_state;
281 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
282 /* read app data until dry event */
284 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
285 if (ret < 0) goto end;
289 s->s3->in_read_app_data=2;
290 s->rwstate=SSL_READING;
291 BIO_clear_retry_flags(SSL_get_rbio(s));
292 BIO_set_retry_read(SSL_get_rbio(s));
297 s->state=s->d1->next_state;
301 case SSL3_ST_CW_CLNT_HELLO_A:
302 case SSL3_ST_CW_CLNT_HELLO_B:
306 /* every DTLS ClientHello resets Finished MAC */
307 ssl3_init_finished_mac(s);
309 dtls1_start_timer(s);
310 ret=ssl3_client_hello(s);
311 if (ret <= 0) goto end;
313 if ( s->d1->send_cookie)
315 s->state=SSL3_ST_CW_FLUSH;
316 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
319 s->state=SSL3_ST_CR_SRVR_HELLO_A;
323 #ifndef OPENSSL_NO_SCTP
324 /* Disable buffering for SCTP */
325 if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
328 /* turn on buffering for the next lot of output */
329 if (s->bbio != s->wbio)
330 s->wbio=BIO_push(s->bbio,s->wbio);
331 #ifndef OPENSSL_NO_SCTP
337 case SSL3_ST_CR_SRVR_HELLO_A:
338 case SSL3_ST_CR_SRVR_HELLO_B:
339 ret=ssl3_get_server_hello(s);
340 if (ret <= 0) goto end;
345 #ifndef OPENSSL_NO_SCTP
346 /* Add new shared key for SCTP-Auth,
347 * will be ignored if no SCTP used.
349 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
350 DTLS1_SCTP_AUTH_LABEL);
352 SSL_export_keying_material(s, sctpauthkey,
353 sizeof(sctpauthkey), labelbuffer,
354 sizeof(labelbuffer), NULL, 0, 0);
356 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
357 sizeof(sctpauthkey), sctpauthkey);
360 s->state=SSL3_ST_CR_FINISHED_A;
363 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
368 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
369 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
371 ret = dtls1_get_hello_verify(s);
375 if ( s->d1->send_cookie) /* start again, with a cookie */
376 s->state=SSL3_ST_CW_CLNT_HELLO_A;
378 s->state = SSL3_ST_CR_CERT_A;
382 case SSL3_ST_CR_CERT_A:
383 case SSL3_ST_CR_CERT_B:
384 #ifndef OPENSSL_NO_TLSEXT
385 ret=ssl3_check_finished(s);
386 if (ret <= 0) goto end;
390 if (s->tlsext_ticket_expected)
391 s->state=SSL3_ST_CR_SESSION_TICKET_A;
393 s->state=SSL3_ST_CR_FINISHED_A;
398 /* Check if it is anon DH or PSK */
399 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
400 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
402 ret=ssl3_get_server_certificate(s);
403 if (ret <= 0) goto end;
404 #ifndef OPENSSL_NO_TLSEXT
405 if (s->tlsext_status_expected)
406 s->state=SSL3_ST_CR_CERT_STATUS_A;
408 s->state=SSL3_ST_CR_KEY_EXCH_A;
413 s->state=SSL3_ST_CR_KEY_EXCH_A;
420 s->state=SSL3_ST_CR_KEY_EXCH_A;
425 case SSL3_ST_CR_KEY_EXCH_A:
426 case SSL3_ST_CR_KEY_EXCH_B:
427 ret=ssl3_get_key_exchange(s);
428 if (ret <= 0) goto end;
429 s->state=SSL3_ST_CR_CERT_REQ_A;
432 /* at this point we check that we have the
433 * required stuff from the server */
434 if (!ssl3_check_cert_and_algorithm(s))
441 case SSL3_ST_CR_CERT_REQ_A:
442 case SSL3_ST_CR_CERT_REQ_B:
443 ret=ssl3_get_certificate_request(s);
444 if (ret <= 0) goto end;
445 s->state=SSL3_ST_CR_SRVR_DONE_A;
449 case SSL3_ST_CR_SRVR_DONE_A:
450 case SSL3_ST_CR_SRVR_DONE_B:
451 ret=ssl3_get_server_done(s);
452 if (ret <= 0) goto end;
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);
475 if (ret <= 0) goto end;
476 s->state=SSL3_ST_CW_KEY_EXCH_A;
480 case SSL3_ST_CW_KEY_EXCH_A:
481 case SSL3_ST_CW_KEY_EXCH_B:
482 dtls1_start_timer(s);
483 ret=ssl3_send_client_key_exchange(s);
484 if (ret <= 0) goto end;
486 #ifndef OPENSSL_NO_SCTP
487 /* Add new shared key for SCTP-Auth,
488 * will be ignored if no SCTP used.
490 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
491 DTLS1_SCTP_AUTH_LABEL);
493 SSL_export_keying_material(s, sctpauthkey,
494 sizeof(sctpauthkey), labelbuffer,
495 sizeof(labelbuffer), NULL, 0, 0);
497 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
498 sizeof(sctpauthkey), sctpauthkey);
501 /* EAY EAY EAY need to check for DH fix cert
503 /* For TLS, cert_req is set to 2, so a cert chain
504 * of nothing is sent, but no verify packet is sent */
505 if (s->s3->tmp.cert_req == 1)
507 s->state=SSL3_ST_CW_CERT_VRFY_A;
511 #ifndef OPENSSL_NO_SCTP
512 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
514 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
515 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
519 s->state=SSL3_ST_CW_CHANGE_A;
520 s->s3->change_cipher_spec=0;
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);
530 if (ret <= 0) goto end;
531 #ifndef OPENSSL_NO_SCTP
532 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;
539 s->state=SSL3_ST_CW_CHANGE_A;
541 s->s3->change_cipher_spec=0;
544 case SSL3_ST_CW_CHANGE_A:
545 case SSL3_ST_CW_CHANGE_B:
547 dtls1_start_timer(s);
548 ret=dtls1_send_change_cipher_spec(s,
549 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
550 if (ret <= 0) goto end;
552 #ifndef OPENSSL_NO_SCTP
553 /* Change to new shared key of SCTP-Auth,
554 * will be ignored if no SCTP used.
556 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
559 s->state=SSL3_ST_CW_FINISHED_A;
562 s->session->cipher=s->s3->tmp.new_cipher;
563 #ifdef OPENSSL_NO_COMP
564 s->session->compress_meth=0;
566 if (s->s3->tmp.new_compression == NULL)
567 s->session->compress_meth=0;
569 s->session->compress_meth=
570 s->s3->tmp.new_compression->id;
572 if (!s->method->ssl3_enc->setup_key_block(s))
578 if (!s->method->ssl3_enc->change_cipher_state(s,
579 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
585 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
588 case SSL3_ST_CW_FINISHED_A:
589 case SSL3_ST_CW_FINISHED_B:
591 dtls1_start_timer(s);
592 ret=ssl3_send_finished(s,
593 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
594 s->method->ssl3_enc->client_finished_label,
595 s->method->ssl3_enc->client_finished_label_len);
596 if (ret <= 0) goto end;
597 s->state=SSL3_ST_CW_FLUSH;
600 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
603 s->s3->tmp.next_state=SSL_ST_OK;
604 #ifndef OPENSSL_NO_SCTP
605 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
607 s->d1->next_state = s->s3->tmp.next_state;
608 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
611 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
614 #ifndef OPENSSL_NO_SCTP
615 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
617 s->d1->next_state = SSL_ST_OK;
618 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
621 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
622 s->s3->delay_buf_pop_ret=0;
627 #ifndef OPENSSL_NO_TLSEXT
628 /* Allow NewSessionTicket if ticket expected */
629 if (s->tlsext_ticket_expected)
630 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
634 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
639 #ifndef OPENSSL_NO_TLSEXT
640 case SSL3_ST_CR_SESSION_TICKET_A:
641 case SSL3_ST_CR_SESSION_TICKET_B:
642 ret=ssl3_get_new_session_ticket(s);
643 if (ret <= 0) goto end;
644 s->state=SSL3_ST_CR_FINISHED_A;
648 case SSL3_ST_CR_CERT_STATUS_A:
649 case SSL3_ST_CR_CERT_STATUS_B:
650 ret=ssl3_get_cert_status(s);
651 if (ret <= 0) goto end;
652 s->state=SSL3_ST_CR_KEY_EXCH_A;
657 case SSL3_ST_CR_FINISHED_A:
658 case SSL3_ST_CR_FINISHED_B:
659 s->d1->change_cipher_spec_ok = 1;
660 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
661 SSL3_ST_CR_FINISHED_B);
662 if (ret <= 0) goto end;
666 s->state=SSL3_ST_CW_CHANGE_A;
670 #ifndef OPENSSL_NO_SCTP
671 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
672 state == SSL_ST_RENEGOTIATE)
674 s->d1->next_state=s->state;
675 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
682 case SSL3_ST_CW_FLUSH:
683 s->rwstate=SSL_WRITING;
684 if (BIO_flush(s->wbio) <= 0)
686 /* If the write error was fatal, stop trying */
687 if (!BIO_should_retry(s->wbio))
689 s->rwstate=SSL_NOTHING;
690 s->state=s->s3->tmp.next_state;
696 s->rwstate=SSL_NOTHING;
697 s->state=s->s3->tmp.next_state;
701 /* clean a few things up */
702 ssl3_cleanup_key_block(s);
705 if (s->init_buf != NULL)
707 BUF_MEM_free(s->init_buf);
712 /* If we are not 'joining' the last two packets,
713 * remove the buffering now */
714 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
715 ssl_free_wbio_buffer(s);
716 /* else do it later in ssl3_write */
722 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
723 if (s->hit) s->ctx->stats.sess_hit++;
727 s->handshake_func=dtls1_connect;
728 s->ctx->stats.sess_connect_good++;
730 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
732 /* done with handshaking */
733 s->d1->handshake_read_seq = 0;
734 s->d1->next_handshake_write_seq = 0;
739 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
745 /* did we do anything */
746 if (!s->s3->tmp.reuse_message && !skip)
750 if ((ret=BIO_flush(s->wbio)) <= 0)
754 if ((cb != NULL) && (s->state != state))
758 cb(s,SSL_CB_CONNECT_LOOP,1);
767 #ifndef OPENSSL_NO_SCTP
768 /* Notify SCTP BIO socket to leave handshake
769 * mode and allow stream identifier other
770 * than 0. Will be ignored if no SCTP is used.
772 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
778 cb(s,SSL_CB_CONNECT_EXIT,ret);
782 static int dtls1_get_hello_verify(SSL *s)
786 unsigned int cookie_len;
788 n=s->method->ssl_get_message(s,
789 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
790 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
795 if (!ok) return((int)n);
797 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
799 s->d1->send_cookie = 0;
800 s->s3->tmp.reuse_message=1;
804 data = (unsigned char *)s->init_msg;
806 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
808 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
809 s->version=(s->version&0xff00)|data[1];
810 al = SSL_AD_PROTOCOL_VERSION;
815 cookie_len = *(data++);
816 if ( cookie_len > sizeof(s->d1->cookie))
818 al=SSL_AD_ILLEGAL_PARAMETER;
822 memcpy(s->d1->cookie, data, cookie_len);
823 s->d1->cookie_len = cookie_len;
825 s->d1->send_cookie = 1;
829 ssl3_send_alert(s, SSL3_AL_FATAL, al);