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(DTLSv1_client_method,
143 ssl_undefined_function,
145 dtls1_get_client_method)
147 int dtls1_connect(SSL *s)
150 unsigned long Time=(unsigned long)time(NULL);
151 void (*cb)(const SSL *ssl,int type,int val)=NULL;
153 int new_state,state,skip=0;
154 #ifndef OPENSSL_NO_SCTP
155 unsigned char sctpauthkey[64];
156 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
159 RAND_add(&Time,sizeof(Time),0);
163 if (s->info_callback != NULL)
165 else if (s->ctx->info_callback != NULL)
166 cb=s->ctx->info_callback;
169 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
171 #ifndef OPENSSL_NO_SCTP
172 /* Notify SCTP BIO socket to enter handshake
173 * mode and prevent stream identifier other
174 * than 0. Will be ignored if no SCTP is used.
176 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
179 #ifndef OPENSSL_NO_HEARTBEATS
180 /* If we're awaiting a HeartbeatResponse, pretend we
181 * already got and don't await it anymore, because
182 * Heartbeats don't make sense during handshakes anyway.
184 if (s->tlsext_hb_pending)
187 s->tlsext_hb_pending = 0;
198 case SSL_ST_RENEGOTIATE:
200 s->state=SSL_ST_CONNECT;
201 s->ctx->stats.sess_connect_renegotiate++;
205 case SSL_ST_BEFORE|SSL_ST_CONNECT:
206 case SSL_ST_OK|SSL_ST_CONNECT:
209 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
211 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
212 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
214 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
219 /* s->version=SSL3_VERSION; */
220 s->type=SSL_ST_CONNECT;
222 if (s->init_buf == NULL)
224 if ((buf=BUF_MEM_new()) == NULL)
229 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
238 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
240 /* setup buffing BIO */
241 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
243 /* don't push the buffering BIO quite yet */
245 s->state=SSL3_ST_CW_CLNT_HELLO_A;
246 s->ctx->stats.sess_connect++;
248 /* mark client_random uninitialized */
249 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
250 s->d1->send_cookie = 0;
254 #ifndef OPENSSL_NO_SCTP
255 case DTLS1_SCTP_ST_CR_READ_SOCK:
257 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
259 s->s3->in_read_app_data=2;
260 s->rwstate=SSL_READING;
261 BIO_clear_retry_flags(SSL_get_rbio(s));
262 BIO_set_retry_read(SSL_get_rbio(s));
267 s->state=s->s3->tmp.next_state;
270 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
271 /* read app data until dry event */
273 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
274 if (ret < 0) goto end;
278 s->s3->in_read_app_data=2;
279 s->rwstate=SSL_READING;
280 BIO_clear_retry_flags(SSL_get_rbio(s));
281 BIO_set_retry_read(SSL_get_rbio(s));
286 s->state=s->d1->next_state;
290 case SSL3_ST_CW_CLNT_HELLO_A:
291 case SSL3_ST_CW_CLNT_HELLO_B:
295 /* every DTLS ClientHello resets Finished MAC */
296 ssl3_init_finished_mac(s);
298 dtls1_start_timer(s);
299 ret=dtls1_client_hello(s);
300 if (ret <= 0) goto end;
302 if ( s->d1->send_cookie)
304 s->state=SSL3_ST_CW_FLUSH;
305 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
308 s->state=SSL3_ST_CR_SRVR_HELLO_A;
312 #ifndef OPENSSL_NO_SCTP
313 /* Disable buffering for SCTP */
314 if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
317 /* turn on buffering for the next lot of output */
318 if (s->bbio != s->wbio)
319 s->wbio=BIO_push(s->bbio,s->wbio);
320 #ifndef OPENSSL_NO_SCTP
326 case SSL3_ST_CR_SRVR_HELLO_A:
327 case SSL3_ST_CR_SRVR_HELLO_B:
328 ret=ssl3_get_server_hello(s);
329 if (ret <= 0) goto end;
334 #ifndef OPENSSL_NO_SCTP
335 /* Add new shared key for SCTP-Auth,
336 * will be ignored if no SCTP used.
338 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
339 DTLS1_SCTP_AUTH_LABEL);
341 SSL_export_keying_material(s, sctpauthkey,
342 sizeof(sctpauthkey), labelbuffer,
343 sizeof(labelbuffer), NULL, 0, 0);
345 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
346 sizeof(sctpauthkey), sctpauthkey);
349 s->state=SSL3_ST_CR_FINISHED_A;
352 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
357 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
358 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
360 ret = dtls1_get_hello_verify(s);
364 if ( s->d1->send_cookie) /* start again, with a cookie */
365 s->state=SSL3_ST_CW_CLNT_HELLO_A;
367 s->state = SSL3_ST_CR_CERT_A;
371 case SSL3_ST_CR_CERT_A:
372 case SSL3_ST_CR_CERT_B:
373 #ifndef OPENSSL_NO_TLSEXT
374 ret=ssl3_check_finished(s);
375 if (ret <= 0) goto end;
379 if (s->tlsext_ticket_expected)
380 s->state=SSL3_ST_CR_SESSION_TICKET_A;
382 s->state=SSL3_ST_CR_FINISHED_A;
387 /* Check if it is anon DH or PSK */
388 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
389 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
391 ret=ssl3_get_server_certificate(s);
392 if (ret <= 0) goto end;
393 #ifndef OPENSSL_NO_TLSEXT
394 if (s->tlsext_status_expected)
395 s->state=SSL3_ST_CR_CERT_STATUS_A;
397 s->state=SSL3_ST_CR_KEY_EXCH_A;
402 s->state=SSL3_ST_CR_KEY_EXCH_A;
409 s->state=SSL3_ST_CR_KEY_EXCH_A;
414 case SSL3_ST_CR_KEY_EXCH_A:
415 case SSL3_ST_CR_KEY_EXCH_B:
416 ret=ssl3_get_key_exchange(s);
417 if (ret <= 0) goto end;
418 s->state=SSL3_ST_CR_CERT_REQ_A;
421 /* at this point we check that we have the
422 * required stuff from the server */
423 if (!ssl3_check_cert_and_algorithm(s))
430 case SSL3_ST_CR_CERT_REQ_A:
431 case SSL3_ST_CR_CERT_REQ_B:
432 ret=ssl3_get_certificate_request(s);
433 if (ret <= 0) goto end;
434 s->state=SSL3_ST_CR_SRVR_DONE_A;
438 case SSL3_ST_CR_SRVR_DONE_A:
439 case SSL3_ST_CR_SRVR_DONE_B:
440 ret=ssl3_get_server_done(s);
441 if (ret <= 0) goto end;
443 if (s->s3->tmp.cert_req)
444 s->s3->tmp.next_state=SSL3_ST_CW_CERT_A;
446 s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A;
449 #ifndef OPENSSL_NO_SCTP
450 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
451 state == SSL_ST_RENEGOTIATE)
452 s->state=DTLS1_SCTP_ST_CR_READ_SOCK;
455 s->state=s->s3->tmp.next_state;
458 case SSL3_ST_CW_CERT_A:
459 case SSL3_ST_CW_CERT_B:
460 case SSL3_ST_CW_CERT_C:
461 case SSL3_ST_CW_CERT_D:
462 dtls1_start_timer(s);
463 ret=dtls1_send_client_certificate(s);
464 if (ret <= 0) goto end;
465 s->state=SSL3_ST_CW_KEY_EXCH_A;
469 case SSL3_ST_CW_KEY_EXCH_A:
470 case SSL3_ST_CW_KEY_EXCH_B:
471 dtls1_start_timer(s);
472 ret=dtls1_send_client_key_exchange(s);
473 if (ret <= 0) goto end;
475 #ifndef OPENSSL_NO_SCTP
476 /* Add new shared key for SCTP-Auth,
477 * will be ignored if no SCTP used.
479 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
480 DTLS1_SCTP_AUTH_LABEL);
482 SSL_export_keying_material(s, sctpauthkey,
483 sizeof(sctpauthkey), labelbuffer,
484 sizeof(labelbuffer), NULL, 0, 0);
486 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
487 sizeof(sctpauthkey), sctpauthkey);
490 /* EAY EAY EAY need to check for DH fix cert
492 /* For TLS, cert_req is set to 2, so a cert chain
493 * of nothing is sent, but no verify packet is sent */
494 if (s->s3->tmp.cert_req == 1)
496 s->state=SSL3_ST_CW_CERT_VRFY_A;
500 #ifndef OPENSSL_NO_SCTP
501 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
503 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
504 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
508 s->state=SSL3_ST_CW_CHANGE_A;
509 s->s3->change_cipher_spec=0;
515 case SSL3_ST_CW_CERT_VRFY_A:
516 case SSL3_ST_CW_CERT_VRFY_B:
517 dtls1_start_timer(s);
518 ret=dtls1_send_client_verify(s);
519 if (ret <= 0) goto end;
520 #ifndef OPENSSL_NO_SCTP
521 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
523 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
524 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
528 s->state=SSL3_ST_CW_CHANGE_A;
530 s->s3->change_cipher_spec=0;
533 case SSL3_ST_CW_CHANGE_A:
534 case SSL3_ST_CW_CHANGE_B:
536 dtls1_start_timer(s);
537 ret=dtls1_send_change_cipher_spec(s,
538 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
539 if (ret <= 0) goto end;
541 s->state=SSL3_ST_CW_FINISHED_A;
544 s->session->cipher=s->s3->tmp.new_cipher;
545 #ifdef OPENSSL_NO_COMP
546 s->session->compress_meth=0;
548 if (s->s3->tmp.new_compression == NULL)
549 s->session->compress_meth=0;
551 s->session->compress_meth=
552 s->s3->tmp.new_compression->id;
554 if (!s->method->ssl3_enc->setup_key_block(s))
560 if (!s->method->ssl3_enc->change_cipher_state(s,
561 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
567 #ifndef OPENSSL_NO_SCTP
570 /* Change to new shared key of SCTP-Auth,
571 * will be ignored if no SCTP used.
573 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
577 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
580 case SSL3_ST_CW_FINISHED_A:
581 case SSL3_ST_CW_FINISHED_B:
583 dtls1_start_timer(s);
584 ret=dtls1_send_finished(s,
585 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
586 s->method->ssl3_enc->client_finished_label,
587 s->method->ssl3_enc->client_finished_label_len);
588 if (ret <= 0) goto end;
589 s->state=SSL3_ST_CW_FLUSH;
592 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
595 s->s3->tmp.next_state=SSL_ST_OK;
596 #ifndef OPENSSL_NO_SCTP
597 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
599 s->d1->next_state = s->s3->tmp.next_state;
600 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
603 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
606 #ifndef OPENSSL_NO_SCTP
607 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
609 s->d1->next_state = SSL_ST_OK;
610 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
613 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
614 s->s3->delay_buf_pop_ret=0;
619 #ifndef OPENSSL_NO_SCTP
620 /* Change to new shared key of SCTP-Auth,
621 * will be ignored if no SCTP used.
623 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
626 #ifndef OPENSSL_NO_TLSEXT
627 /* Allow NewSessionTicket if ticket expected */
628 if (s->tlsext_ticket_expected)
629 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
633 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
638 #ifndef OPENSSL_NO_TLSEXT
639 case SSL3_ST_CR_SESSION_TICKET_A:
640 case SSL3_ST_CR_SESSION_TICKET_B:
641 ret=ssl3_get_new_session_ticket(s);
642 if (ret <= 0) goto end;
643 s->state=SSL3_ST_CR_FINISHED_A;
647 case SSL3_ST_CR_CERT_STATUS_A:
648 case SSL3_ST_CR_CERT_STATUS_B:
649 ret=ssl3_get_cert_status(s);
650 if (ret <= 0) goto end;
651 s->state=SSL3_ST_CR_KEY_EXCH_A;
656 case SSL3_ST_CR_FINISHED_A:
657 case SSL3_ST_CR_FINISHED_B:
658 s->d1->change_cipher_spec_ok = 1;
659 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
660 SSL3_ST_CR_FINISHED_B);
661 if (ret <= 0) goto end;
665 s->state=SSL3_ST_CW_CHANGE_A;
669 #ifndef OPENSSL_NO_SCTP
670 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
671 state == SSL_ST_RENEGOTIATE)
673 s->d1->next_state=s->state;
674 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
681 case SSL3_ST_CW_FLUSH:
682 s->rwstate=SSL_WRITING;
683 if (BIO_flush(s->wbio) <= 0)
685 /* If the write error was fatal, stop trying */
686 if (!BIO_should_retry(s->wbio))
688 s->rwstate=SSL_NOTHING;
689 s->state=s->s3->tmp.next_state;
695 s->rwstate=SSL_NOTHING;
696 s->state=s->s3->tmp.next_state;
700 /* clean a few things up */
701 ssl3_cleanup_key_block(s);
704 if (s->init_buf != NULL)
706 BUF_MEM_free(s->init_buf);
711 /* If we are not 'joining' the last two packets,
712 * remove the buffering now */
713 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
714 ssl_free_wbio_buffer(s);
715 /* else do it later in ssl3_write */
721 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
722 if (s->hit) s->ctx->stats.sess_hit++;
726 s->handshake_func=dtls1_connect;
727 s->ctx->stats.sess_connect_good++;
729 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
731 /* done with handshaking */
732 s->d1->handshake_read_seq = 0;
733 s->d1->next_handshake_write_seq = 0;
738 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
744 /* did we do anything */
745 if (!s->s3->tmp.reuse_message && !skip)
749 if ((ret=BIO_flush(s->wbio)) <= 0)
753 if ((cb != NULL) && (s->state != state))
757 cb(s,SSL_CB_CONNECT_LOOP,1);
766 #ifndef OPENSSL_NO_SCTP
767 /* Notify SCTP BIO socket to leave handshake
768 * mode and allow stream identifier other
769 * than 0. Will be ignored if no SCTP is used.
771 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
777 cb(s,SSL_CB_CONNECT_EXIT,ret);
781 int dtls1_client_hello(SSL *s)
789 buf=(unsigned char *)s->init_buf->data;
790 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
792 SSL_SESSION *sess = s->session;
793 if ((s->session == NULL) ||
794 (s->session->ssl_version != s->version) ||
795 #ifdef OPENSSL_NO_TLSEXT
796 !sess->session_id_length ||
798 (!sess->session_id_length && !sess->tlsext_tick) ||
800 (s->session->not_resumable))
802 if (!ssl_get_new_session(s,0))
805 /* else use the pre-loaded session */
807 p=s->s3->client_random;
809 /* if client_random is initialized, reuse it, we are
810 * required to use same upon reply to HelloVerify */
811 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++)
813 if (i==sizeof(s->s3->client_random))
814 ssl_fill_hello_random(s, 0, p,
815 sizeof(s->s3->client_random));
817 /* Do the message type and length last */
818 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
820 *(p++)=s->version>>8;
821 *(p++)=s->version&0xff;
822 s->client_version=s->version;
825 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
832 i=s->session->session_id_length;
836 if (i > sizeof s->session->session_id)
838 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
841 memcpy(p,s->session->session_id,i);
846 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
848 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
851 *(p++) = s->d1->cookie_len;
852 memcpy(p, s->d1->cookie, s->d1->cookie_len);
853 p += s->d1->cookie_len;
855 /* Ciphers supported */
856 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
859 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
866 if (s->ctx->comp_methods == NULL)
869 j=sk_SSL_COMP_num(s->ctx->comp_methods);
873 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
876 *(p++)=0; /* Add the NULL method */
878 #ifndef OPENSSL_NO_TLSEXT
879 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
881 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
889 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
891 s->state=SSL3_ST_CW_CLNT_HELLO_B;
892 /* number of bytes to write */
896 /* buffer the message to handle re-xmits */
897 dtls1_buffer_message(s, 0);
900 /* SSL3_ST_CW_CLNT_HELLO_B */
901 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
906 static int dtls1_get_hello_verify(SSL *s)
910 unsigned int cookie_len;
912 n=s->method->ssl_get_message(s,
913 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
914 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
919 if (!ok) return((int)n);
921 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
923 s->d1->send_cookie = 0;
924 s->s3->tmp.reuse_message=1;
928 data = (unsigned char *)s->init_msg;
930 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
932 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
933 s->version=(s->version&0xff00)|data[1];
934 al = SSL_AD_PROTOCOL_VERSION;
939 cookie_len = *(data++);
940 if ( cookie_len > sizeof(s->d1->cookie))
942 al=SSL_AD_ILLEGAL_PARAMETER;
946 memcpy(s->d1->cookie, data, cookie_len);
947 s->d1->cookie_len = cookie_len;
949 s->d1->send_cookie = 1;
953 ssl3_send_alert(s, SSL3_AL_FATAL, al);
957 int dtls1_send_client_key_exchange(SSL *s)
962 #ifndef OPENSSL_NO_RSA
966 #ifndef OPENSSL_NO_KRB5
968 #endif /* OPENSSL_NO_KRB5 */
969 #ifndef OPENSSL_NO_ECDH
970 EC_KEY *clnt_ecdh = NULL;
971 const EC_POINT *srvr_ecpoint = NULL;
972 EVP_PKEY *srvr_pub_pkey = NULL;
973 unsigned char *encodedPoint = NULL;
974 int encoded_pt_len = 0;
975 BN_CTX * bn_ctx = NULL;
978 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
980 d=(unsigned char *)s->init_buf->data;
981 p= &(d[DTLS1_HM_HEADER_LENGTH]);
983 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
985 /* Fool emacs indentation */
987 #ifndef OPENSSL_NO_RSA
988 else if (alg_k & SSL_kRSA)
991 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
993 if (s->session->sess_cert->peer_rsa_tmp != NULL)
994 rsa=s->session->sess_cert->peer_rsa_tmp;
997 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
998 if ((pkey == NULL) ||
999 (pkey->type != EVP_PKEY_RSA) ||
1000 (pkey->pkey.rsa == NULL))
1002 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1006 EVP_PKEY_free(pkey);
1009 tmp_buf[0]=s->client_version>>8;
1010 tmp_buf[1]=s->client_version&0xff;
1011 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1014 s->session->master_key_length=sizeof tmp_buf;
1017 /* Fix buf for TLS and [incidentally] DTLS */
1018 if (s->version > SSL3_VERSION)
1020 n=RSA_public_encrypt(sizeof tmp_buf,
1021 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1023 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1024 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1028 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1032 /* Fix buf for TLS and [incidentally] DTLS */
1033 if (s->version > SSL3_VERSION)
1039 s->session->master_key_length=
1040 s->method->ssl3_enc->generate_master_secret(s,
1041 s->session->master_key,
1042 tmp_buf,sizeof tmp_buf);
1043 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1046 #ifndef OPENSSL_NO_KRB5
1047 else if (alg_k & SSL_kKRB5)
1049 krb5_error_code krb5rc;
1050 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1051 /* krb5_data krb5_ap_req; */
1052 krb5_data *enc_ticket;
1053 krb5_data authenticator, *authp = NULL;
1054 EVP_CIPHER_CTX ciph_ctx;
1055 const EVP_CIPHER *enc = NULL;
1056 unsigned char iv[EVP_MAX_IV_LENGTH];
1057 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1058 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1059 + EVP_MAX_IV_LENGTH];
1060 int padl, outl = sizeof(epms);
1062 EVP_CIPHER_CTX_init(&ciph_ctx);
1065 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1067 #endif /* KSSL_DEBUG */
1071 if (KRB5SENDAUTH) authp = &authenticator;
1072 #endif /* KRB5SENDAUTH */
1074 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1076 enc = kssl_map_enc(kssl_ctx->enctype);
1081 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1082 if (krb5rc && kssl_err.text)
1083 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1085 #endif /* KSSL_DEBUG */
1089 ssl3_send_alert(s,SSL3_AL_FATAL,
1090 SSL_AD_HANDSHAKE_FAILURE);
1091 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1096 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1097 ** in place of RFC 2712 KerberosWrapper, as in:
1099 ** Send ticket (copy to *p, set n = length)
1100 ** n = krb5_ap_req.length;
1101 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1102 ** if (krb5_ap_req.data)
1103 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1105 ** Now using real RFC 2712 KerberosWrapper
1106 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1107 ** Note: 2712 "opaque" types are here replaced
1108 ** with a 2-byte length followed by the value.
1110 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1111 ** Where "xx xx" = length bytes. Shown here with
1112 ** optional authenticator omitted.
1115 /* KerberosWrapper.Ticket */
1116 s2n(enc_ticket->length,p);
1117 memcpy(p, enc_ticket->data, enc_ticket->length);
1118 p+= enc_ticket->length;
1119 n = enc_ticket->length + 2;
1121 /* KerberosWrapper.Authenticator */
1122 if (authp && authp->length)
1124 s2n(authp->length,p);
1125 memcpy(p, authp->data, authp->length);
1127 n+= authp->length + 2;
1135 s2n(0,p);/* null authenticator length */
1139 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1142 /* 20010420 VRS. Tried it this way; failed.
1143 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1144 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1145 ** kssl_ctx->length);
1146 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1149 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1150 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1152 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1154 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1156 if (outl > (int)sizeof epms)
1158 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1161 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1163 /* KerberosWrapper.EncryptedPreMasterSecret */
1165 memcpy(p, epms, outl);
1169 s->session->master_key_length=
1170 s->method->ssl3_enc->generate_master_secret(s,
1171 s->session->master_key,
1172 tmp_buf, sizeof tmp_buf);
1174 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1175 OPENSSL_cleanse(epms, outl);
1178 #ifndef OPENSSL_NO_DH
1179 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1181 DH *dh_srvr,*dh_clnt;
1183 if (s->session->sess_cert->peer_dh_tmp != NULL)
1184 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1187 /* we get them from the cert */
1188 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1189 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1193 /* generate a new random key */
1194 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1196 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1199 if (!DH_generate_key(dh_clnt))
1201 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1205 /* use the 'p' output buffer for the DH key, but
1206 * make sure to clear it out afterwards */
1208 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1212 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1216 /* generate master key from the result */
1217 s->session->master_key_length=
1218 s->method->ssl3_enc->generate_master_secret(s,
1219 s->session->master_key,p,n);
1223 /* send off the data */
1224 n=BN_num_bytes(dh_clnt->pub_key);
1226 BN_bn2bin(dh_clnt->pub_key,p);
1231 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1234 #ifndef OPENSSL_NO_ECDH
1235 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1237 const EC_GROUP *srvr_group = NULL;
1239 int ecdh_clnt_cert = 0;
1242 /* Did we send out the client's
1243 * ECDH share for use in premaster
1244 * computation as part of client certificate?
1245 * If so, set ecdh_clnt_cert to 1.
1247 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1249 /* XXX: For now, we do not support client
1250 * authentication using ECDH certificates.
1251 * To add such support, one needs to add
1252 * code that checks for appropriate
1253 * conditions and sets ecdh_clnt_cert to 1.
1254 * For example, the cert have an ECC
1255 * key on the same curve as the server's
1256 * and the key should be authorized for
1259 * One also needs to add code in ssl3_connect
1260 * to skip sending the certificate verify
1263 * if ((s->cert->key->privatekey != NULL) &&
1264 * (s->cert->key->privatekey->type ==
1265 * EVP_PKEY_EC) && ...)
1266 * ecdh_clnt_cert = 1;
1270 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1272 tkey = s->session->sess_cert->peer_ecdh_tmp;
1276 /* Get the Server Public Key from Cert */
1277 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1278 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1279 if ((srvr_pub_pkey == NULL) ||
1280 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1281 (srvr_pub_pkey->pkey.ec == NULL))
1283 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1284 ERR_R_INTERNAL_ERROR);
1288 tkey = srvr_pub_pkey->pkey.ec;
1291 srvr_group = EC_KEY_get0_group(tkey);
1292 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1294 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1296 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1297 ERR_R_INTERNAL_ERROR);
1301 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1303 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1307 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1309 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1314 /* Reuse key info from our certificate
1315 * We only need our private key to perform
1316 * the ECDH computation.
1318 const BIGNUM *priv_key;
1319 tkey = s->cert->key->privatekey->pkey.ec;
1320 priv_key = EC_KEY_get0_private_key(tkey);
1321 if (priv_key == NULL)
1323 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1326 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1328 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1334 /* Generate a new ECDH key pair */
1335 if (!(EC_KEY_generate_key(clnt_ecdh)))
1337 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1342 /* use the 'p' output buffer for the ECDH key, but
1343 * make sure to clear it out afterwards
1346 field_size = EC_GROUP_get_degree(srvr_group);
1347 if (field_size <= 0)
1349 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1353 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1356 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1361 /* generate master key from the result */
1362 s->session->master_key_length = s->method->ssl3_enc \
1363 -> generate_master_secret(s,
1364 s->session->master_key,
1367 memset(p, 0, n); /* clean up */
1371 /* Send empty client key exch message */
1376 /* First check the size of encoding and
1377 * allocate memory accordingly.
1380 EC_POINT_point2oct(srvr_group,
1381 EC_KEY_get0_public_key(clnt_ecdh),
1382 POINT_CONVERSION_UNCOMPRESSED,
1385 encodedPoint = (unsigned char *)
1386 OPENSSL_malloc(encoded_pt_len *
1387 sizeof(unsigned char));
1388 bn_ctx = BN_CTX_new();
1389 if ((encodedPoint == NULL) ||
1392 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1396 /* Encode the public key */
1397 n = EC_POINT_point2oct(srvr_group,
1398 EC_KEY_get0_public_key(clnt_ecdh),
1399 POINT_CONVERSION_UNCOMPRESSED,
1400 encodedPoint, encoded_pt_len, bn_ctx);
1402 *p = n; /* length of encoded point */
1403 /* Encoded point will be copied here */
1405 /* copy the point */
1406 memcpy((unsigned char *)p, encodedPoint, n);
1407 /* increment n to account for length field */
1411 /* Free allocated memory */
1412 BN_CTX_free(bn_ctx);
1413 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1414 if (clnt_ecdh != NULL)
1415 EC_KEY_free(clnt_ecdh);
1416 EVP_PKEY_free(srvr_pub_pkey);
1418 #endif /* !OPENSSL_NO_ECDH */
1420 #ifndef OPENSSL_NO_PSK
1421 else if (alg_k & SSL_kPSK)
1423 char identity[PSK_MAX_IDENTITY_LEN];
1424 unsigned char *t = NULL;
1425 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1426 unsigned int pre_ms_len = 0, psk_len = 0;
1430 if (s->psk_client_callback == NULL)
1432 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1433 SSL_R_PSK_NO_CLIENT_CB);
1437 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1438 identity, PSK_MAX_IDENTITY_LEN,
1439 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1440 if (psk_len > PSK_MAX_PSK_LEN)
1442 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1443 ERR_R_INTERNAL_ERROR);
1446 else if (psk_len == 0)
1448 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1449 SSL_R_PSK_IDENTITY_NOT_FOUND);
1453 /* create PSK pre_master_secret */
1454 pre_ms_len = 2+psk_len+2+psk_len;
1456 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1458 memset(t, 0, psk_len);
1462 if (s->session->psk_identity_hint != NULL)
1463 OPENSSL_free(s->session->psk_identity_hint);
1464 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1465 if (s->ctx->psk_identity_hint != NULL &&
1466 s->session->psk_identity_hint == NULL)
1468 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1469 ERR_R_MALLOC_FAILURE);
1473 if (s->session->psk_identity != NULL)
1474 OPENSSL_free(s->session->psk_identity);
1475 s->session->psk_identity = BUF_strdup(identity);
1476 if (s->session->psk_identity == NULL)
1478 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1479 ERR_R_MALLOC_FAILURE);
1483 s->session->master_key_length =
1484 s->method->ssl3_enc->generate_master_secret(s,
1485 s->session->master_key,
1486 psk_or_pre_ms, pre_ms_len);
1487 n = strlen(identity);
1489 memcpy(p, identity, n);
1493 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1494 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1497 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1504 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1505 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1509 d = dtls1_set_message_header(s, d,
1510 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1512 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1514 l2n(s->d1->handshake_write_seq,d);
1515 s->d1->handshake_write_seq++;
1518 s->state=SSL3_ST_CW_KEY_EXCH_B;
1519 /* number of bytes to write */
1520 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1523 /* buffer the message to handle re-xmits */
1524 dtls1_buffer_message(s, 0);
1527 /* SSL3_ST_CW_KEY_EXCH_B */
1528 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1530 #ifndef OPENSSL_NO_ECDH
1531 BN_CTX_free(bn_ctx);
1532 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1533 if (clnt_ecdh != NULL)
1534 EC_KEY_free(clnt_ecdh);
1535 EVP_PKEY_free(srvr_pub_pkey);
1540 int dtls1_send_client_verify(SSL *s)
1542 unsigned char *p,*d;
1543 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1545 #ifndef OPENSSL_NO_RSA
1549 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1553 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1555 d=(unsigned char *)s->init_buf->data;
1556 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1557 pkey=s->cert->key->privatekey;
1559 s->method->ssl3_enc->cert_verify_mac(s,
1561 &(data[MD5_DIGEST_LENGTH]));
1563 #ifndef OPENSSL_NO_RSA
1564 if (pkey->type == EVP_PKEY_RSA)
1566 s->method->ssl3_enc->cert_verify_mac(s,
1569 if (RSA_sign(NID_md5_sha1, data,
1570 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1571 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1573 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1581 #ifndef OPENSSL_NO_DSA
1582 if (pkey->type == EVP_PKEY_DSA)
1584 if (!DSA_sign(pkey->save_type,
1585 &(data[MD5_DIGEST_LENGTH]),
1586 SHA_DIGEST_LENGTH,&(p[2]),
1587 (unsigned int *)&j,pkey->pkey.dsa))
1589 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1597 #ifndef OPENSSL_NO_ECDSA
1598 if (pkey->type == EVP_PKEY_EC)
1600 if (!ECDSA_sign(pkey->save_type,
1601 &(data[MD5_DIGEST_LENGTH]),
1602 SHA_DIGEST_LENGTH,&(p[2]),
1603 (unsigned int *)&j,pkey->pkey.ec))
1605 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1615 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1619 d = dtls1_set_message_header(s, d,
1620 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1622 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1625 /* buffer the message to handle re-xmits */
1626 dtls1_buffer_message(s, 0);
1628 s->state = SSL3_ST_CW_CERT_VRFY_B;
1631 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1632 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1637 int dtls1_send_client_certificate(SSL *s)
1640 EVP_PKEY *pkey=NULL;
1644 if (s->state == SSL3_ST_CW_CERT_A)
1646 if ((s->cert == NULL) ||
1647 (s->cert->key->x509 == NULL) ||
1648 (s->cert->key->privatekey == NULL))
1649 s->state=SSL3_ST_CW_CERT_B;
1651 s->state=SSL3_ST_CW_CERT_C;
1654 /* We need to get a client cert */
1655 if (s->state == SSL3_ST_CW_CERT_B)
1657 /* If we get an error, we need to
1658 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1659 * We then get retied later */
1661 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1664 s->rwstate=SSL_X509_LOOKUP;
1667 s->rwstate=SSL_NOTHING;
1668 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1670 s->state=SSL3_ST_CW_CERT_B;
1671 if ( !SSL_use_certificate(s,x509) ||
1672 !SSL_use_PrivateKey(s,pkey))
1678 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1681 if (x509 != NULL) X509_free(x509);
1682 if (pkey != NULL) EVP_PKEY_free(pkey);
1685 if (s->version == SSL3_VERSION)
1687 s->s3->tmp.cert_req=0;
1688 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1693 s->s3->tmp.cert_req=2;
1697 /* Ok, we have a cert */
1698 s->state=SSL3_ST_CW_CERT_C;
1701 if (s->state == SSL3_ST_CW_CERT_C)
1703 s->state=SSL3_ST_CW_CERT_D;
1704 l=dtls1_output_cert_chain(s,
1705 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1709 /* set header called by dtls1_output_cert_chain() */
1711 /* buffer the message to handle re-xmits */
1712 dtls1_buffer_message(s, 0);
1714 /* SSL3_ST_CW_CERT_D */
1715 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));