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;
252 s->d1->change_cipher_spec_ok = 0;
253 /* Should have been reset by ssl3_get_finished, too. */
254 s->s3->change_cipher_spec = 0;
257 #ifndef OPENSSL_NO_SCTP
258 case DTLS1_SCTP_ST_CR_READ_SOCK:
260 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
262 s->s3->in_read_app_data=2;
263 s->rwstate=SSL_READING;
264 BIO_clear_retry_flags(SSL_get_rbio(s));
265 BIO_set_retry_read(SSL_get_rbio(s));
270 s->state=s->s3->tmp.next_state;
273 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
274 /* read app data until dry event */
276 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
277 if (ret < 0) goto end;
281 s->s3->in_read_app_data=2;
282 s->rwstate=SSL_READING;
283 BIO_clear_retry_flags(SSL_get_rbio(s));
284 BIO_set_retry_read(SSL_get_rbio(s));
289 s->state=s->d1->next_state;
293 case SSL3_ST_CW_CLNT_HELLO_A:
294 case SSL3_ST_CW_CLNT_HELLO_B:
298 /* every DTLS ClientHello resets Finished MAC */
299 ssl3_init_finished_mac(s);
301 dtls1_start_timer(s);
302 ret=dtls1_client_hello(s);
303 if (ret <= 0) goto end;
305 if ( s->d1->send_cookie)
307 s->state=SSL3_ST_CW_FLUSH;
308 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
311 s->state=SSL3_ST_CR_SRVR_HELLO_A;
315 #ifndef OPENSSL_NO_SCTP
316 /* Disable buffering for SCTP */
317 if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
320 /* turn on buffering for the next lot of output */
321 if (s->bbio != s->wbio)
322 s->wbio=BIO_push(s->bbio,s->wbio);
323 #ifndef OPENSSL_NO_SCTP
329 case SSL3_ST_CR_SRVR_HELLO_A:
330 case SSL3_ST_CR_SRVR_HELLO_B:
331 ret=ssl3_get_server_hello(s);
332 if (ret <= 0) goto end;
337 #ifndef OPENSSL_NO_SCTP
338 /* Add new shared key for SCTP-Auth,
339 * will be ignored if no SCTP used.
341 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
342 DTLS1_SCTP_AUTH_LABEL);
344 SSL_export_keying_material(s, sctpauthkey,
345 sizeof(sctpauthkey), labelbuffer,
346 sizeof(labelbuffer), NULL, 0, 0);
348 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
349 sizeof(sctpauthkey), sctpauthkey);
352 s->state=SSL3_ST_CR_FINISHED_A;
355 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
360 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
361 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
363 ret = dtls1_get_hello_verify(s);
367 if ( s->d1->send_cookie) /* start again, with a cookie */
368 s->state=SSL3_ST_CW_CLNT_HELLO_A;
370 s->state = SSL3_ST_CR_CERT_A;
374 case SSL3_ST_CR_CERT_A:
375 case SSL3_ST_CR_CERT_B:
376 /* Check if it is anon DH or PSK */
377 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
378 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
380 ret=ssl3_get_server_certificate(s);
381 if (ret <= 0) goto end;
382 #ifndef OPENSSL_NO_TLSEXT
383 if (s->tlsext_status_expected)
384 s->state=SSL3_ST_CR_CERT_STATUS_A;
386 s->state=SSL3_ST_CR_KEY_EXCH_A;
391 s->state=SSL3_ST_CR_KEY_EXCH_A;
398 s->state=SSL3_ST_CR_KEY_EXCH_A;
403 case SSL3_ST_CR_KEY_EXCH_A:
404 case SSL3_ST_CR_KEY_EXCH_B:
405 ret=ssl3_get_key_exchange(s);
406 if (ret <= 0) goto end;
407 s->state=SSL3_ST_CR_CERT_REQ_A;
410 /* at this point we check that we have the
411 * required stuff from the server */
412 if (!ssl3_check_cert_and_algorithm(s))
419 case SSL3_ST_CR_CERT_REQ_A:
420 case SSL3_ST_CR_CERT_REQ_B:
421 ret=ssl3_get_certificate_request(s);
422 if (ret <= 0) goto end;
423 s->state=SSL3_ST_CR_SRVR_DONE_A;
427 case SSL3_ST_CR_SRVR_DONE_A:
428 case SSL3_ST_CR_SRVR_DONE_B:
429 ret=ssl3_get_server_done(s);
430 if (ret <= 0) goto end;
432 if (s->s3->tmp.cert_req)
433 s->s3->tmp.next_state=SSL3_ST_CW_CERT_A;
435 s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A;
438 #ifndef OPENSSL_NO_SCTP
439 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
440 state == SSL_ST_RENEGOTIATE)
441 s->state=DTLS1_SCTP_ST_CR_READ_SOCK;
444 s->state=s->s3->tmp.next_state;
447 case SSL3_ST_CW_CERT_A:
448 case SSL3_ST_CW_CERT_B:
449 case SSL3_ST_CW_CERT_C:
450 case SSL3_ST_CW_CERT_D:
451 dtls1_start_timer(s);
452 ret=dtls1_send_client_certificate(s);
453 if (ret <= 0) goto end;
454 s->state=SSL3_ST_CW_KEY_EXCH_A;
458 case SSL3_ST_CW_KEY_EXCH_A:
459 case SSL3_ST_CW_KEY_EXCH_B:
460 dtls1_start_timer(s);
461 ret=dtls1_send_client_key_exchange(s);
462 if (ret <= 0) goto end;
464 #ifndef OPENSSL_NO_SCTP
465 /* Add new shared key for SCTP-Auth,
466 * will be ignored if no SCTP used.
468 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
469 DTLS1_SCTP_AUTH_LABEL);
471 SSL_export_keying_material(s, sctpauthkey,
472 sizeof(sctpauthkey), labelbuffer,
473 sizeof(labelbuffer), NULL, 0, 0);
475 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
476 sizeof(sctpauthkey), sctpauthkey);
479 /* EAY EAY EAY need to check for DH fix cert
481 /* For TLS, cert_req is set to 2, so a cert chain
482 * of nothing is sent, but no verify packet is sent */
483 if (s->s3->tmp.cert_req == 1)
485 s->state=SSL3_ST_CW_CERT_VRFY_A;
489 #ifndef OPENSSL_NO_SCTP
490 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
492 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
493 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
497 s->state=SSL3_ST_CW_CHANGE_A;
503 case SSL3_ST_CW_CERT_VRFY_A:
504 case SSL3_ST_CW_CERT_VRFY_B:
505 dtls1_start_timer(s);
506 ret=dtls1_send_client_verify(s);
507 if (ret <= 0) goto end;
508 #ifndef OPENSSL_NO_SCTP
509 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
511 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
512 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
516 s->state=SSL3_ST_CW_CHANGE_A;
520 case SSL3_ST_CW_CHANGE_A:
521 case SSL3_ST_CW_CHANGE_B:
523 dtls1_start_timer(s);
524 ret=dtls1_send_change_cipher_spec(s,
525 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
526 if (ret <= 0) goto end;
528 s->state=SSL3_ST_CW_FINISHED_A;
531 s->session->cipher=s->s3->tmp.new_cipher;
532 #ifdef OPENSSL_NO_COMP
533 s->session->compress_meth=0;
535 if (s->s3->tmp.new_compression == NULL)
536 s->session->compress_meth=0;
538 s->session->compress_meth=
539 s->s3->tmp.new_compression->id;
541 if (!s->method->ssl3_enc->setup_key_block(s))
547 if (!s->method->ssl3_enc->change_cipher_state(s,
548 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
554 #ifndef OPENSSL_NO_SCTP
557 /* Change to new shared key of SCTP-Auth,
558 * will be ignored if no SCTP used.
560 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
564 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
567 case SSL3_ST_CW_FINISHED_A:
568 case SSL3_ST_CW_FINISHED_B:
570 dtls1_start_timer(s);
571 ret=dtls1_send_finished(s,
572 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
573 s->method->ssl3_enc->client_finished_label,
574 s->method->ssl3_enc->client_finished_label_len);
575 if (ret <= 0) goto end;
576 s->state=SSL3_ST_CW_FLUSH;
579 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
582 s->s3->tmp.next_state=SSL_ST_OK;
583 #ifndef OPENSSL_NO_SCTP
584 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
586 s->d1->next_state = s->s3->tmp.next_state;
587 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
590 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
593 #ifndef OPENSSL_NO_SCTP
594 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
596 s->d1->next_state = SSL_ST_OK;
597 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
600 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
601 s->s3->delay_buf_pop_ret=0;
606 #ifndef OPENSSL_NO_SCTP
607 /* Change to new shared key of SCTP-Auth,
608 * will be ignored if no SCTP used.
610 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
613 #ifndef OPENSSL_NO_TLSEXT
614 /* Allow NewSessionTicket if ticket expected */
615 if (s->tlsext_ticket_expected)
616 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
620 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
625 #ifndef OPENSSL_NO_TLSEXT
626 case SSL3_ST_CR_SESSION_TICKET_A:
627 case SSL3_ST_CR_SESSION_TICKET_B:
628 ret=ssl3_get_new_session_ticket(s);
629 if (ret <= 0) goto end;
630 s->state=SSL3_ST_CR_FINISHED_A;
634 case SSL3_ST_CR_CERT_STATUS_A:
635 case SSL3_ST_CR_CERT_STATUS_B:
636 ret=ssl3_get_cert_status(s);
637 if (ret <= 0) goto end;
638 s->state=SSL3_ST_CR_KEY_EXCH_A;
643 case SSL3_ST_CR_FINISHED_A:
644 case SSL3_ST_CR_FINISHED_B:
645 s->d1->change_cipher_spec_ok = 1;
646 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
647 SSL3_ST_CR_FINISHED_B);
648 if (ret <= 0) goto end;
652 s->state=SSL3_ST_CW_CHANGE_A;
656 #ifndef OPENSSL_NO_SCTP
657 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
658 state == SSL_ST_RENEGOTIATE)
660 s->d1->next_state=s->state;
661 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
668 case SSL3_ST_CW_FLUSH:
669 s->rwstate=SSL_WRITING;
670 if (BIO_flush(s->wbio) <= 0)
672 /* If the write error was fatal, stop trying */
673 if (!BIO_should_retry(s->wbio))
675 s->rwstate=SSL_NOTHING;
676 s->state=s->s3->tmp.next_state;
682 s->rwstate=SSL_NOTHING;
683 s->state=s->s3->tmp.next_state;
687 /* clean a few things up */
688 ssl3_cleanup_key_block(s);
691 if (s->init_buf != NULL)
693 BUF_MEM_free(s->init_buf);
698 /* If we are not 'joining' the last two packets,
699 * remove the buffering now */
700 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
701 ssl_free_wbio_buffer(s);
702 /* else do it later in ssl3_write */
708 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
709 if (s->hit) s->ctx->stats.sess_hit++;
713 s->handshake_func=dtls1_connect;
714 s->ctx->stats.sess_connect_good++;
716 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
718 /* done with handshaking */
719 s->d1->handshake_read_seq = 0;
720 s->d1->next_handshake_write_seq = 0;
725 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
731 /* did we do anything */
732 if (!s->s3->tmp.reuse_message && !skip)
736 if ((ret=BIO_flush(s->wbio)) <= 0)
740 if ((cb != NULL) && (s->state != state))
744 cb(s,SSL_CB_CONNECT_LOOP,1);
753 #ifndef OPENSSL_NO_SCTP
754 /* Notify SCTP BIO socket to leave handshake
755 * mode and allow stream identifier other
756 * than 0. Will be ignored if no SCTP is used.
758 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
764 cb(s,SSL_CB_CONNECT_EXIT,ret);
768 int dtls1_client_hello(SSL *s)
776 buf=(unsigned char *)s->init_buf->data;
777 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
779 SSL_SESSION *sess = s->session;
780 if ((s->session == NULL) ||
781 (s->session->ssl_version != s->version) ||
782 #ifdef OPENSSL_NO_TLSEXT
783 !sess->session_id_length ||
785 (!sess->session_id_length && !sess->tlsext_tick) ||
787 (s->session->not_resumable))
789 if (!ssl_get_new_session(s,0))
792 /* else use the pre-loaded session */
794 p=s->s3->client_random;
796 /* if client_random is initialized, reuse it, we are
797 * required to use same upon reply to HelloVerify */
798 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++)
800 if (i==sizeof(s->s3->client_random))
801 ssl_fill_hello_random(s, 0, p,
802 sizeof(s->s3->client_random));
804 /* Do the message type and length last */
805 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
807 *(p++)=s->version>>8;
808 *(p++)=s->version&0xff;
809 s->client_version=s->version;
812 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
819 i=s->session->session_id_length;
823 if (i > sizeof s->session->session_id)
825 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
828 memcpy(p,s->session->session_id,i);
833 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
835 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
838 *(p++) = s->d1->cookie_len;
839 memcpy(p, s->d1->cookie, s->d1->cookie_len);
840 p += s->d1->cookie_len;
842 /* Ciphers supported */
843 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
846 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
853 if (s->ctx->comp_methods == NULL)
856 j=sk_SSL_COMP_num(s->ctx->comp_methods);
860 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
863 *(p++)=0; /* Add the NULL method */
865 #ifndef OPENSSL_NO_TLSEXT
867 if (ssl_prepare_clienthello_tlsext(s) <= 0)
869 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
872 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
874 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
882 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
884 s->state=SSL3_ST_CW_CLNT_HELLO_B;
885 /* number of bytes to write */
889 /* buffer the message to handle re-xmits */
890 dtls1_buffer_message(s, 0);
893 /* SSL3_ST_CW_CLNT_HELLO_B */
894 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
899 static int dtls1_get_hello_verify(SSL *s)
903 unsigned int cookie_len;
905 n=s->method->ssl_get_message(s,
906 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
907 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
912 if (!ok) return((int)n);
914 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
916 s->d1->send_cookie = 0;
917 s->s3->tmp.reuse_message=1;
921 data = (unsigned char *)s->init_msg;
923 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
925 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
926 s->version=(s->version&0xff00)|data[1];
927 al = SSL_AD_PROTOCOL_VERSION;
932 cookie_len = *(data++);
933 if ( cookie_len > sizeof(s->d1->cookie))
935 al=SSL_AD_ILLEGAL_PARAMETER;
939 memcpy(s->d1->cookie, data, cookie_len);
940 s->d1->cookie_len = cookie_len;
942 s->d1->send_cookie = 1;
946 ssl3_send_alert(s, SSL3_AL_FATAL, al);
950 int dtls1_send_client_key_exchange(SSL *s)
955 #ifndef OPENSSL_NO_RSA
959 #ifndef OPENSSL_NO_KRB5
961 #endif /* OPENSSL_NO_KRB5 */
962 #ifndef OPENSSL_NO_ECDH
963 EC_KEY *clnt_ecdh = NULL;
964 const EC_POINT *srvr_ecpoint = NULL;
965 EVP_PKEY *srvr_pub_pkey = NULL;
966 unsigned char *encodedPoint = NULL;
967 int encoded_pt_len = 0;
968 BN_CTX * bn_ctx = NULL;
971 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
973 d=(unsigned char *)s->init_buf->data;
974 p= &(d[DTLS1_HM_HEADER_LENGTH]);
976 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
978 /* Fool emacs indentation */
980 #ifndef OPENSSL_NO_RSA
981 else if (alg_k & SSL_kRSA)
984 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
986 if (s->session->sess_cert == NULL)
988 /* We should always have a server certificate with SSL_kRSA. */
989 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
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 == NULL)
1185 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1186 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1190 if (s->session->sess_cert->peer_dh_tmp != NULL)
1191 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1194 /* we get them from the cert */
1195 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1196 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1200 /* generate a new random key */
1201 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1203 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1206 if (!DH_generate_key(dh_clnt))
1208 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1212 /* use the 'p' output buffer for the DH key, but
1213 * make sure to clear it out afterwards */
1215 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1219 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1223 /* generate master key from the result */
1224 s->session->master_key_length=
1225 s->method->ssl3_enc->generate_master_secret(s,
1226 s->session->master_key,p,n);
1230 /* send off the data */
1231 n=BN_num_bytes(dh_clnt->pub_key);
1233 BN_bn2bin(dh_clnt->pub_key,p);
1238 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1241 #ifndef OPENSSL_NO_ECDH
1242 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1244 const EC_GROUP *srvr_group = NULL;
1246 int ecdh_clnt_cert = 0;
1249 if (s->session->sess_cert == NULL)
1251 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1252 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1256 /* Did we send out the client's
1257 * ECDH share for use in premaster
1258 * computation as part of client certificate?
1259 * If so, set ecdh_clnt_cert to 1.
1261 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1263 /* XXX: For now, we do not support client
1264 * authentication using ECDH certificates.
1265 * To add such support, one needs to add
1266 * code that checks for appropriate
1267 * conditions and sets ecdh_clnt_cert to 1.
1268 * For example, the cert have an ECC
1269 * key on the same curve as the server's
1270 * and the key should be authorized for
1273 * One also needs to add code in ssl3_connect
1274 * to skip sending the certificate verify
1277 * if ((s->cert->key->privatekey != NULL) &&
1278 * (s->cert->key->privatekey->type ==
1279 * EVP_PKEY_EC) && ...)
1280 * ecdh_clnt_cert = 1;
1284 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1286 tkey = s->session->sess_cert->peer_ecdh_tmp;
1290 /* Get the Server Public Key from Cert */
1291 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1292 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1293 if ((srvr_pub_pkey == NULL) ||
1294 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1295 (srvr_pub_pkey->pkey.ec == NULL))
1297 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1298 ERR_R_INTERNAL_ERROR);
1302 tkey = srvr_pub_pkey->pkey.ec;
1305 srvr_group = EC_KEY_get0_group(tkey);
1306 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1308 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1310 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1311 ERR_R_INTERNAL_ERROR);
1315 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1317 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1321 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1323 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1328 /* Reuse key info from our certificate
1329 * We only need our private key to perform
1330 * the ECDH computation.
1332 const BIGNUM *priv_key;
1333 tkey = s->cert->key->privatekey->pkey.ec;
1334 priv_key = EC_KEY_get0_private_key(tkey);
1335 if (priv_key == NULL)
1337 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1340 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1342 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1348 /* Generate a new ECDH key pair */
1349 if (!(EC_KEY_generate_key(clnt_ecdh)))
1351 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1356 /* use the 'p' output buffer for the ECDH key, but
1357 * make sure to clear it out afterwards
1360 field_size = EC_GROUP_get_degree(srvr_group);
1361 if (field_size <= 0)
1363 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1367 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1370 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1375 /* generate master key from the result */
1376 s->session->master_key_length = s->method->ssl3_enc \
1377 -> generate_master_secret(s,
1378 s->session->master_key,
1381 memset(p, 0, n); /* clean up */
1385 /* Send empty client key exch message */
1390 /* First check the size of encoding and
1391 * allocate memory accordingly.
1394 EC_POINT_point2oct(srvr_group,
1395 EC_KEY_get0_public_key(clnt_ecdh),
1396 POINT_CONVERSION_UNCOMPRESSED,
1399 encodedPoint = (unsigned char *)
1400 OPENSSL_malloc(encoded_pt_len *
1401 sizeof(unsigned char));
1402 bn_ctx = BN_CTX_new();
1403 if ((encodedPoint == NULL) ||
1406 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1410 /* Encode the public key */
1411 n = EC_POINT_point2oct(srvr_group,
1412 EC_KEY_get0_public_key(clnt_ecdh),
1413 POINT_CONVERSION_UNCOMPRESSED,
1414 encodedPoint, encoded_pt_len, bn_ctx);
1416 *p = n; /* length of encoded point */
1417 /* Encoded point will be copied here */
1419 /* copy the point */
1420 memcpy((unsigned char *)p, encodedPoint, n);
1421 /* increment n to account for length field */
1425 /* Free allocated memory */
1426 BN_CTX_free(bn_ctx);
1427 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1428 if (clnt_ecdh != NULL)
1429 EC_KEY_free(clnt_ecdh);
1430 EVP_PKEY_free(srvr_pub_pkey);
1432 #endif /* !OPENSSL_NO_ECDH */
1434 #ifndef OPENSSL_NO_PSK
1435 else if (alg_k & SSL_kPSK)
1437 char identity[PSK_MAX_IDENTITY_LEN];
1438 unsigned char *t = NULL;
1439 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1440 unsigned int pre_ms_len = 0, psk_len = 0;
1444 if (s->psk_client_callback == NULL)
1446 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1447 SSL_R_PSK_NO_CLIENT_CB);
1451 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1452 identity, PSK_MAX_IDENTITY_LEN,
1453 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1454 if (psk_len > PSK_MAX_PSK_LEN)
1456 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1457 ERR_R_INTERNAL_ERROR);
1460 else if (psk_len == 0)
1462 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1463 SSL_R_PSK_IDENTITY_NOT_FOUND);
1467 /* create PSK pre_master_secret */
1468 pre_ms_len = 2+psk_len+2+psk_len;
1470 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1472 memset(t, 0, psk_len);
1476 if (s->session->psk_identity_hint != NULL)
1477 OPENSSL_free(s->session->psk_identity_hint);
1478 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1479 if (s->ctx->psk_identity_hint != NULL &&
1480 s->session->psk_identity_hint == NULL)
1482 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1483 ERR_R_MALLOC_FAILURE);
1487 if (s->session->psk_identity != NULL)
1488 OPENSSL_free(s->session->psk_identity);
1489 s->session->psk_identity = BUF_strdup(identity);
1490 if (s->session->psk_identity == NULL)
1492 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1493 ERR_R_MALLOC_FAILURE);
1497 s->session->master_key_length =
1498 s->method->ssl3_enc->generate_master_secret(s,
1499 s->session->master_key,
1500 psk_or_pre_ms, pre_ms_len);
1501 n = strlen(identity);
1503 memcpy(p, identity, n);
1507 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1508 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1511 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1518 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1519 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1523 d = dtls1_set_message_header(s, d,
1524 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1526 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1528 l2n(s->d1->handshake_write_seq,d);
1529 s->d1->handshake_write_seq++;
1532 s->state=SSL3_ST_CW_KEY_EXCH_B;
1533 /* number of bytes to write */
1534 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1537 /* buffer the message to handle re-xmits */
1538 dtls1_buffer_message(s, 0);
1541 /* SSL3_ST_CW_KEY_EXCH_B */
1542 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1544 #ifndef OPENSSL_NO_ECDH
1545 BN_CTX_free(bn_ctx);
1546 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1547 if (clnt_ecdh != NULL)
1548 EC_KEY_free(clnt_ecdh);
1549 EVP_PKEY_free(srvr_pub_pkey);
1554 int dtls1_send_client_verify(SSL *s)
1556 unsigned char *p,*d;
1557 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1559 #ifndef OPENSSL_NO_RSA
1563 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1567 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1569 d=(unsigned char *)s->init_buf->data;
1570 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1571 pkey=s->cert->key->privatekey;
1573 s->method->ssl3_enc->cert_verify_mac(s,
1575 &(data[MD5_DIGEST_LENGTH]));
1577 #ifndef OPENSSL_NO_RSA
1578 if (pkey->type == EVP_PKEY_RSA)
1580 s->method->ssl3_enc->cert_verify_mac(s,
1583 if (RSA_sign(NID_md5_sha1, data,
1584 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1585 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1587 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1595 #ifndef OPENSSL_NO_DSA
1596 if (pkey->type == EVP_PKEY_DSA)
1598 if (!DSA_sign(pkey->save_type,
1599 &(data[MD5_DIGEST_LENGTH]),
1600 SHA_DIGEST_LENGTH,&(p[2]),
1601 (unsigned int *)&j,pkey->pkey.dsa))
1603 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1611 #ifndef OPENSSL_NO_ECDSA
1612 if (pkey->type == EVP_PKEY_EC)
1614 if (!ECDSA_sign(pkey->save_type,
1615 &(data[MD5_DIGEST_LENGTH]),
1616 SHA_DIGEST_LENGTH,&(p[2]),
1617 (unsigned int *)&j,pkey->pkey.ec))
1619 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1629 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1633 d = dtls1_set_message_header(s, d,
1634 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1636 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1639 /* buffer the message to handle re-xmits */
1640 dtls1_buffer_message(s, 0);
1642 s->state = SSL3_ST_CW_CERT_VRFY_B;
1645 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1646 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1651 int dtls1_send_client_certificate(SSL *s)
1654 EVP_PKEY *pkey=NULL;
1658 if (s->state == SSL3_ST_CW_CERT_A)
1660 if ((s->cert == NULL) ||
1661 (s->cert->key->x509 == NULL) ||
1662 (s->cert->key->privatekey == NULL))
1663 s->state=SSL3_ST_CW_CERT_B;
1665 s->state=SSL3_ST_CW_CERT_C;
1668 /* We need to get a client cert */
1669 if (s->state == SSL3_ST_CW_CERT_B)
1671 /* If we get an error, we need to
1672 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1673 * We then get retied later */
1675 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1678 s->rwstate=SSL_X509_LOOKUP;
1681 s->rwstate=SSL_NOTHING;
1682 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1684 s->state=SSL3_ST_CW_CERT_B;
1685 if ( !SSL_use_certificate(s,x509) ||
1686 !SSL_use_PrivateKey(s,pkey))
1692 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1695 if (x509 != NULL) X509_free(x509);
1696 if (pkey != NULL) EVP_PKEY_free(pkey);
1699 if (s->version == SSL3_VERSION)
1701 s->s3->tmp.cert_req=0;
1702 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1707 s->s3->tmp.cert_req=2;
1711 /* Ok, we have a cert */
1712 s->state=SSL3_ST_CW_CERT_C;
1715 if (s->state == SSL3_ST_CW_CERT_C)
1717 s->state=SSL3_ST_CW_CERT_D;
1718 l=dtls1_output_cert_chain(s,
1719 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1722 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1723 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
1729 /* set header called by dtls1_output_cert_chain() */
1731 /* buffer the message to handle re-xmits */
1732 dtls1_buffer_message(s, 0);
1734 /* SSL3_ST_CW_CERT_D */
1735 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));