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 #ifndef OPENSSL_NO_SCTP
542 /* Change to new shared key of SCTP-Auth,
543 * will be ignored if no SCTP used.
545 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
548 s->state=SSL3_ST_CW_FINISHED_A;
551 s->session->cipher=s->s3->tmp.new_cipher;
552 #ifdef OPENSSL_NO_COMP
553 s->session->compress_meth=0;
555 if (s->s3->tmp.new_compression == NULL)
556 s->session->compress_meth=0;
558 s->session->compress_meth=
559 s->s3->tmp.new_compression->id;
561 if (!s->method->ssl3_enc->setup_key_block(s))
567 if (!s->method->ssl3_enc->change_cipher_state(s,
568 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
574 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
577 case SSL3_ST_CW_FINISHED_A:
578 case SSL3_ST_CW_FINISHED_B:
580 dtls1_start_timer(s);
581 ret=dtls1_send_finished(s,
582 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
583 s->method->ssl3_enc->client_finished_label,
584 s->method->ssl3_enc->client_finished_label_len);
585 if (ret <= 0) goto end;
586 s->state=SSL3_ST_CW_FLUSH;
589 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
592 s->s3->tmp.next_state=SSL_ST_OK;
593 #ifndef OPENSSL_NO_SCTP
594 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
596 s->d1->next_state = s->s3->tmp.next_state;
597 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
600 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
603 #ifndef OPENSSL_NO_SCTP
604 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
606 s->d1->next_state = SSL_ST_OK;
607 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
610 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
611 s->s3->delay_buf_pop_ret=0;
616 #ifndef OPENSSL_NO_TLSEXT
617 /* Allow NewSessionTicket if ticket expected */
618 if (s->tlsext_ticket_expected)
619 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
623 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
628 #ifndef OPENSSL_NO_TLSEXT
629 case SSL3_ST_CR_SESSION_TICKET_A:
630 case SSL3_ST_CR_SESSION_TICKET_B:
631 ret=ssl3_get_new_session_ticket(s);
632 if (ret <= 0) goto end;
633 s->state=SSL3_ST_CR_FINISHED_A;
637 case SSL3_ST_CR_CERT_STATUS_A:
638 case SSL3_ST_CR_CERT_STATUS_B:
639 ret=ssl3_get_cert_status(s);
640 if (ret <= 0) goto end;
641 s->state=SSL3_ST_CR_KEY_EXCH_A;
646 case SSL3_ST_CR_FINISHED_A:
647 case SSL3_ST_CR_FINISHED_B:
648 s->d1->change_cipher_spec_ok = 1;
649 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
650 SSL3_ST_CR_FINISHED_B);
651 if (ret <= 0) goto end;
655 s->state=SSL3_ST_CW_CHANGE_A;
659 #ifndef OPENSSL_NO_SCTP
660 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
661 state == SSL_ST_RENEGOTIATE)
663 s->d1->next_state=s->state;
664 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
671 case SSL3_ST_CW_FLUSH:
672 s->rwstate=SSL_WRITING;
673 if (BIO_flush(s->wbio) <= 0)
675 /* If the write error was fatal, stop trying */
676 if (!BIO_should_retry(s->wbio))
678 s->rwstate=SSL_NOTHING;
679 s->state=s->s3->tmp.next_state;
685 s->rwstate=SSL_NOTHING;
686 s->state=s->s3->tmp.next_state;
690 /* clean a few things up */
691 ssl3_cleanup_key_block(s);
694 if (s->init_buf != NULL)
696 BUF_MEM_free(s->init_buf);
701 /* If we are not 'joining' the last two packets,
702 * remove the buffering now */
703 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
704 ssl_free_wbio_buffer(s);
705 /* else do it later in ssl3_write */
711 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
712 if (s->hit) s->ctx->stats.sess_hit++;
716 s->handshake_func=dtls1_connect;
717 s->ctx->stats.sess_connect_good++;
719 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
721 /* done with handshaking */
722 s->d1->handshake_read_seq = 0;
723 s->d1->next_handshake_write_seq = 0;
728 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
734 /* did we do anything */
735 if (!s->s3->tmp.reuse_message && !skip)
739 if ((ret=BIO_flush(s->wbio)) <= 0)
743 if ((cb != NULL) && (s->state != state))
747 cb(s,SSL_CB_CONNECT_LOOP,1);
756 #ifndef OPENSSL_NO_SCTP
757 /* Notify SCTP BIO socket to leave handshake
758 * mode and allow stream identifier other
759 * than 0. Will be ignored if no SCTP is used.
761 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
767 cb(s,SSL_CB_CONNECT_EXIT,ret);
771 int dtls1_client_hello(SSL *s)
779 buf=(unsigned char *)s->init_buf->data;
780 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
782 SSL_SESSION *sess = s->session;
783 if ((s->session == NULL) ||
784 (s->session->ssl_version != s->version) ||
785 #ifdef OPENSSL_NO_TLSEXT
786 !sess->session_id_length ||
788 (!sess->session_id_length && !sess->tlsext_tick) ||
790 (s->session->not_resumable))
792 if (!ssl_get_new_session(s,0))
795 /* else use the pre-loaded session */
797 p=s->s3->client_random;
799 /* if client_random is initialized, reuse it, we are
800 * required to use same upon reply to HelloVerify */
801 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
802 if (i==sizeof(s->s3->client_random))
804 RAND_pseudo_bytes(p,sizeof(s->s3->client_random));
807 /* Do the message type and length last */
808 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
810 *(p++)=s->version>>8;
811 *(p++)=s->version&0xff;
812 s->client_version=s->version;
815 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
822 i=s->session->session_id_length;
826 if (i > sizeof s->session->session_id)
828 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
831 memcpy(p,s->session->session_id,i);
836 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
838 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
841 *(p++) = s->d1->cookie_len;
842 memcpy(p, s->d1->cookie, s->d1->cookie_len);
843 p += s->d1->cookie_len;
845 /* Ciphers supported */
846 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
849 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
856 if (s->ctx->comp_methods == NULL)
859 j=sk_SSL_COMP_num(s->ctx->comp_methods);
863 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
866 *(p++)=0; /* Add the NULL method */
868 #ifndef OPENSSL_NO_TLSEXT
869 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
871 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
879 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
881 s->state=SSL3_ST_CW_CLNT_HELLO_B;
882 /* number of bytes to write */
886 /* buffer the message to handle re-xmits */
887 dtls1_buffer_message(s, 0);
890 /* SSL3_ST_CW_CLNT_HELLO_B */
891 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
896 static int dtls1_get_hello_verify(SSL *s)
900 unsigned int cookie_len;
902 n=s->method->ssl_get_message(s,
903 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
904 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
909 if (!ok) return((int)n);
911 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
913 s->d1->send_cookie = 0;
914 s->s3->tmp.reuse_message=1;
918 data = (unsigned char *)s->init_msg;
920 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
922 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
923 s->version=(s->version&0xff00)|data[1];
924 al = SSL_AD_PROTOCOL_VERSION;
929 cookie_len = *(data++);
930 if ( cookie_len > sizeof(s->d1->cookie))
932 al=SSL_AD_ILLEGAL_PARAMETER;
936 memcpy(s->d1->cookie, data, cookie_len);
937 s->d1->cookie_len = cookie_len;
939 s->d1->send_cookie = 1;
943 ssl3_send_alert(s, SSL3_AL_FATAL, al);
947 int dtls1_send_client_key_exchange(SSL *s)
952 #ifndef OPENSSL_NO_RSA
956 #ifndef OPENSSL_NO_KRB5
958 #endif /* OPENSSL_NO_KRB5 */
959 #ifndef OPENSSL_NO_ECDH
960 EC_KEY *clnt_ecdh = NULL;
961 const EC_POINT *srvr_ecpoint = NULL;
962 EVP_PKEY *srvr_pub_pkey = NULL;
963 unsigned char *encodedPoint = NULL;
964 int encoded_pt_len = 0;
965 BN_CTX * bn_ctx = NULL;
968 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
970 d=(unsigned char *)s->init_buf->data;
971 p= &(d[DTLS1_HM_HEADER_LENGTH]);
973 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
975 /* Fool emacs indentation */
977 #ifndef OPENSSL_NO_RSA
978 else if (alg_k & SSL_kRSA)
981 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
983 if (s->session->sess_cert->peer_rsa_tmp != NULL)
984 rsa=s->session->sess_cert->peer_rsa_tmp;
987 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
988 if ((pkey == NULL) ||
989 (pkey->type != EVP_PKEY_RSA) ||
990 (pkey->pkey.rsa == NULL))
992 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
999 tmp_buf[0]=s->client_version>>8;
1000 tmp_buf[1]=s->client_version&0xff;
1001 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1004 s->session->master_key_length=sizeof tmp_buf;
1007 /* Fix buf for TLS and [incidentally] DTLS */
1008 if (s->version > SSL3_VERSION)
1010 n=RSA_public_encrypt(sizeof tmp_buf,
1011 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1013 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1014 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1018 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1022 /* Fix buf for TLS and [incidentally] DTLS */
1023 if (s->version > SSL3_VERSION)
1029 s->session->master_key_length=
1030 s->method->ssl3_enc->generate_master_secret(s,
1031 s->session->master_key,
1032 tmp_buf,sizeof tmp_buf);
1033 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1036 #ifndef OPENSSL_NO_KRB5
1037 else if (alg_k & SSL_kKRB5)
1039 krb5_error_code krb5rc;
1040 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1041 /* krb5_data krb5_ap_req; */
1042 krb5_data *enc_ticket;
1043 krb5_data authenticator, *authp = NULL;
1044 EVP_CIPHER_CTX ciph_ctx;
1045 const EVP_CIPHER *enc = NULL;
1046 unsigned char iv[EVP_MAX_IV_LENGTH];
1047 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1048 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1049 + EVP_MAX_IV_LENGTH];
1050 int padl, outl = sizeof(epms);
1052 EVP_CIPHER_CTX_init(&ciph_ctx);
1055 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1057 #endif /* KSSL_DEBUG */
1061 if (KRB5SENDAUTH) authp = &authenticator;
1062 #endif /* KRB5SENDAUTH */
1064 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1066 enc = kssl_map_enc(kssl_ctx->enctype);
1071 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1072 if (krb5rc && kssl_err.text)
1073 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1075 #endif /* KSSL_DEBUG */
1079 ssl3_send_alert(s,SSL3_AL_FATAL,
1080 SSL_AD_HANDSHAKE_FAILURE);
1081 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1086 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1087 ** in place of RFC 2712 KerberosWrapper, as in:
1089 ** Send ticket (copy to *p, set n = length)
1090 ** n = krb5_ap_req.length;
1091 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1092 ** if (krb5_ap_req.data)
1093 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1095 ** Now using real RFC 2712 KerberosWrapper
1096 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1097 ** Note: 2712 "opaque" types are here replaced
1098 ** with a 2-byte length followed by the value.
1100 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1101 ** Where "xx xx" = length bytes. Shown here with
1102 ** optional authenticator omitted.
1105 /* KerberosWrapper.Ticket */
1106 s2n(enc_ticket->length,p);
1107 memcpy(p, enc_ticket->data, enc_ticket->length);
1108 p+= enc_ticket->length;
1109 n = enc_ticket->length + 2;
1111 /* KerberosWrapper.Authenticator */
1112 if (authp && authp->length)
1114 s2n(authp->length,p);
1115 memcpy(p, authp->data, authp->length);
1117 n+= authp->length + 2;
1125 s2n(0,p);/* null authenticator length */
1129 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1132 /* 20010420 VRS. Tried it this way; failed.
1133 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1134 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1135 ** kssl_ctx->length);
1136 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1139 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1140 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1142 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1144 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1146 if (outl > (int)sizeof epms)
1148 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1151 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1153 /* KerberosWrapper.EncryptedPreMasterSecret */
1155 memcpy(p, epms, outl);
1159 s->session->master_key_length=
1160 s->method->ssl3_enc->generate_master_secret(s,
1161 s->session->master_key,
1162 tmp_buf, sizeof tmp_buf);
1164 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1165 OPENSSL_cleanse(epms, outl);
1168 #ifndef OPENSSL_NO_DH
1169 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1171 DH *dh_srvr,*dh_clnt;
1173 if (s->session->sess_cert->peer_dh_tmp != NULL)
1174 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1177 /* we get them from the cert */
1178 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1179 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1183 /* generate a new random key */
1184 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1186 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1189 if (!DH_generate_key(dh_clnt))
1191 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1195 /* use the 'p' output buffer for the DH key, but
1196 * make sure to clear it out afterwards */
1198 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1202 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1206 /* generate master key from the result */
1207 s->session->master_key_length=
1208 s->method->ssl3_enc->generate_master_secret(s,
1209 s->session->master_key,p,n);
1213 /* send off the data */
1214 n=BN_num_bytes(dh_clnt->pub_key);
1216 BN_bn2bin(dh_clnt->pub_key,p);
1221 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1224 #ifndef OPENSSL_NO_ECDH
1225 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1227 const EC_GROUP *srvr_group = NULL;
1229 int ecdh_clnt_cert = 0;
1232 /* Did we send out the client's
1233 * ECDH share for use in premaster
1234 * computation as part of client certificate?
1235 * If so, set ecdh_clnt_cert to 1.
1237 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1239 /* XXX: For now, we do not support client
1240 * authentication using ECDH certificates.
1241 * To add such support, one needs to add
1242 * code that checks for appropriate
1243 * conditions and sets ecdh_clnt_cert to 1.
1244 * For example, the cert have an ECC
1245 * key on the same curve as the server's
1246 * and the key should be authorized for
1249 * One also needs to add code in ssl3_connect
1250 * to skip sending the certificate verify
1253 * if ((s->cert->key->privatekey != NULL) &&
1254 * (s->cert->key->privatekey->type ==
1255 * EVP_PKEY_EC) && ...)
1256 * ecdh_clnt_cert = 1;
1260 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1262 tkey = s->session->sess_cert->peer_ecdh_tmp;
1266 /* Get the Server Public Key from Cert */
1267 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1268 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1269 if ((srvr_pub_pkey == NULL) ||
1270 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1271 (srvr_pub_pkey->pkey.ec == NULL))
1273 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1274 ERR_R_INTERNAL_ERROR);
1278 tkey = srvr_pub_pkey->pkey.ec;
1281 srvr_group = EC_KEY_get0_group(tkey);
1282 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1284 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1286 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1287 ERR_R_INTERNAL_ERROR);
1291 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1293 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1297 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1299 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1304 /* Reuse key info from our certificate
1305 * We only need our private key to perform
1306 * the ECDH computation.
1308 const BIGNUM *priv_key;
1309 tkey = s->cert->key->privatekey->pkey.ec;
1310 priv_key = EC_KEY_get0_private_key(tkey);
1311 if (priv_key == NULL)
1313 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1316 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1318 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1324 /* Generate a new ECDH key pair */
1325 if (!(EC_KEY_generate_key(clnt_ecdh)))
1327 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1332 /* use the 'p' output buffer for the ECDH key, but
1333 * make sure to clear it out afterwards
1336 field_size = EC_GROUP_get_degree(srvr_group);
1337 if (field_size <= 0)
1339 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1343 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1346 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1351 /* generate master key from the result */
1352 s->session->master_key_length = s->method->ssl3_enc \
1353 -> generate_master_secret(s,
1354 s->session->master_key,
1357 memset(p, 0, n); /* clean up */
1361 /* Send empty client key exch message */
1366 /* First check the size of encoding and
1367 * allocate memory accordingly.
1370 EC_POINT_point2oct(srvr_group,
1371 EC_KEY_get0_public_key(clnt_ecdh),
1372 POINT_CONVERSION_UNCOMPRESSED,
1375 encodedPoint = (unsigned char *)
1376 OPENSSL_malloc(encoded_pt_len *
1377 sizeof(unsigned char));
1378 bn_ctx = BN_CTX_new();
1379 if ((encodedPoint == NULL) ||
1382 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1386 /* Encode the public key */
1387 n = EC_POINT_point2oct(srvr_group,
1388 EC_KEY_get0_public_key(clnt_ecdh),
1389 POINT_CONVERSION_UNCOMPRESSED,
1390 encodedPoint, encoded_pt_len, bn_ctx);
1392 *p = n; /* length of encoded point */
1393 /* Encoded point will be copied here */
1395 /* copy the point */
1396 memcpy((unsigned char *)p, encodedPoint, n);
1397 /* increment n to account for length field */
1401 /* Free allocated memory */
1402 BN_CTX_free(bn_ctx);
1403 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1404 if (clnt_ecdh != NULL)
1405 EC_KEY_free(clnt_ecdh);
1406 EVP_PKEY_free(srvr_pub_pkey);
1408 #endif /* !OPENSSL_NO_ECDH */
1410 #ifndef OPENSSL_NO_PSK
1411 else if (alg_k & SSL_kPSK)
1413 char identity[PSK_MAX_IDENTITY_LEN];
1414 unsigned char *t = NULL;
1415 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1416 unsigned int pre_ms_len = 0, psk_len = 0;
1420 if (s->psk_client_callback == NULL)
1422 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1423 SSL_R_PSK_NO_CLIENT_CB);
1427 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1428 identity, PSK_MAX_IDENTITY_LEN,
1429 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1430 if (psk_len > PSK_MAX_PSK_LEN)
1432 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1433 ERR_R_INTERNAL_ERROR);
1436 else if (psk_len == 0)
1438 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1439 SSL_R_PSK_IDENTITY_NOT_FOUND);
1443 /* create PSK pre_master_secret */
1444 pre_ms_len = 2+psk_len+2+psk_len;
1446 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1448 memset(t, 0, psk_len);
1452 if (s->session->psk_identity_hint != NULL)
1453 OPENSSL_free(s->session->psk_identity_hint);
1454 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1455 if (s->ctx->psk_identity_hint != NULL &&
1456 s->session->psk_identity_hint == NULL)
1458 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1459 ERR_R_MALLOC_FAILURE);
1463 if (s->session->psk_identity != NULL)
1464 OPENSSL_free(s->session->psk_identity);
1465 s->session->psk_identity = BUF_strdup(identity);
1466 if (s->session->psk_identity == NULL)
1468 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1469 ERR_R_MALLOC_FAILURE);
1473 s->session->master_key_length =
1474 s->method->ssl3_enc->generate_master_secret(s,
1475 s->session->master_key,
1476 psk_or_pre_ms, pre_ms_len);
1477 n = strlen(identity);
1479 memcpy(p, identity, n);
1483 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1484 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1487 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1494 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1495 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1499 d = dtls1_set_message_header(s, d,
1500 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1502 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1504 l2n(s->d1->handshake_write_seq,d);
1505 s->d1->handshake_write_seq++;
1508 s->state=SSL3_ST_CW_KEY_EXCH_B;
1509 /* number of bytes to write */
1510 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1513 /* buffer the message to handle re-xmits */
1514 dtls1_buffer_message(s, 0);
1517 /* SSL3_ST_CW_KEY_EXCH_B */
1518 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1520 #ifndef OPENSSL_NO_ECDH
1521 BN_CTX_free(bn_ctx);
1522 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1523 if (clnt_ecdh != NULL)
1524 EC_KEY_free(clnt_ecdh);
1525 EVP_PKEY_free(srvr_pub_pkey);
1530 int dtls1_send_client_verify(SSL *s)
1532 unsigned char *p,*d;
1533 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1535 #ifndef OPENSSL_NO_RSA
1539 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1543 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1545 d=(unsigned char *)s->init_buf->data;
1546 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1547 pkey=s->cert->key->privatekey;
1549 s->method->ssl3_enc->cert_verify_mac(s,
1551 &(data[MD5_DIGEST_LENGTH]));
1553 #ifndef OPENSSL_NO_RSA
1554 if (pkey->type == EVP_PKEY_RSA)
1556 s->method->ssl3_enc->cert_verify_mac(s,
1559 if (RSA_sign(NID_md5_sha1, data,
1560 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1561 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1563 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1571 #ifndef OPENSSL_NO_DSA
1572 if (pkey->type == EVP_PKEY_DSA)
1574 if (!DSA_sign(pkey->save_type,
1575 &(data[MD5_DIGEST_LENGTH]),
1576 SHA_DIGEST_LENGTH,&(p[2]),
1577 (unsigned int *)&j,pkey->pkey.dsa))
1579 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1587 #ifndef OPENSSL_NO_ECDSA
1588 if (pkey->type == EVP_PKEY_EC)
1590 if (!ECDSA_sign(pkey->save_type,
1591 &(data[MD5_DIGEST_LENGTH]),
1592 SHA_DIGEST_LENGTH,&(p[2]),
1593 (unsigned int *)&j,pkey->pkey.ec))
1595 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1605 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1609 d = dtls1_set_message_header(s, d,
1610 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1612 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1615 /* buffer the message to handle re-xmits */
1616 dtls1_buffer_message(s, 0);
1618 s->state = SSL3_ST_CW_CERT_VRFY_B;
1621 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1622 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1627 int dtls1_send_client_certificate(SSL *s)
1630 EVP_PKEY *pkey=NULL;
1634 if (s->state == SSL3_ST_CW_CERT_A)
1636 if ((s->cert == NULL) ||
1637 (s->cert->key->x509 == NULL) ||
1638 (s->cert->key->privatekey == NULL))
1639 s->state=SSL3_ST_CW_CERT_B;
1641 s->state=SSL3_ST_CW_CERT_C;
1644 /* We need to get a client cert */
1645 if (s->state == SSL3_ST_CW_CERT_B)
1647 /* If we get an error, we need to
1648 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1649 * We then get retied later */
1651 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1654 s->rwstate=SSL_X509_LOOKUP;
1657 s->rwstate=SSL_NOTHING;
1658 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1660 s->state=SSL3_ST_CW_CERT_B;
1661 if ( !SSL_use_certificate(s,x509) ||
1662 !SSL_use_PrivateKey(s,pkey))
1668 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1671 if (x509 != NULL) X509_free(x509);
1672 if (pkey != NULL) EVP_PKEY_free(pkey);
1675 if (s->version == SSL3_VERSION)
1677 s->s3->tmp.cert_req=0;
1678 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1683 s->s3->tmp.cert_req=2;
1687 /* Ok, we have a cert */
1688 s->state=SSL3_ST_CW_CERT_C;
1691 if (s->state == SSL3_ST_CW_CERT_C)
1693 s->state=SSL3_ST_CW_CERT_D;
1694 l=dtls1_output_cert_chain(s,
1695 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1699 /* set header called by dtls1_output_cert_chain() */
1701 /* buffer the message to handle re-xmits */
1702 dtls1_buffer_message(s, 0);
1704 /* SSL3_ST_CW_CERT_D */
1705 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));