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)
776 unsigned long Time,l;
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 Time=(unsigned long)time(NULL); /* Time */
806 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
809 /* Do the message type and length last */
810 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
812 *(p++)=s->version>>8;
813 *(p++)=s->version&0xff;
814 s->client_version=s->version;
817 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
824 i=s->session->session_id_length;
828 if (i > sizeof s->session->session_id)
830 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
833 memcpy(p,s->session->session_id,i);
838 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
840 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
843 *(p++) = s->d1->cookie_len;
844 memcpy(p, s->d1->cookie, s->d1->cookie_len);
845 p += s->d1->cookie_len;
847 /* Ciphers supported */
848 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
851 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
858 if (s->ctx->comp_methods == NULL)
861 j=sk_SSL_COMP_num(s->ctx->comp_methods);
865 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
868 *(p++)=0; /* Add the NULL method */
870 #ifndef OPENSSL_NO_TLSEXT
871 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
873 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
881 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
883 s->state=SSL3_ST_CW_CLNT_HELLO_B;
884 /* number of bytes to write */
888 /* buffer the message to handle re-xmits */
889 dtls1_buffer_message(s, 0);
892 /* SSL3_ST_CW_CLNT_HELLO_B */
893 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
898 static int dtls1_get_hello_verify(SSL *s)
902 unsigned int cookie_len;
904 n=s->method->ssl_get_message(s,
905 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
906 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
911 if (!ok) return((int)n);
913 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
915 s->d1->send_cookie = 0;
916 s->s3->tmp.reuse_message=1;
920 data = (unsigned char *)s->init_msg;
922 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
924 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
925 s->version=(s->version&0xff00)|data[1];
926 al = SSL_AD_PROTOCOL_VERSION;
931 cookie_len = *(data++);
932 if ( cookie_len > sizeof(s->d1->cookie))
934 al=SSL_AD_ILLEGAL_PARAMETER;
938 memcpy(s->d1->cookie, data, cookie_len);
939 s->d1->cookie_len = cookie_len;
941 s->d1->send_cookie = 1;
945 ssl3_send_alert(s, SSL3_AL_FATAL, al);
949 int dtls1_send_client_key_exchange(SSL *s)
954 #ifndef OPENSSL_NO_RSA
958 #ifndef OPENSSL_NO_KRB5
960 #endif /* OPENSSL_NO_KRB5 */
961 #ifndef OPENSSL_NO_ECDH
962 EC_KEY *clnt_ecdh = NULL;
963 const EC_POINT *srvr_ecpoint = NULL;
964 EVP_PKEY *srvr_pub_pkey = NULL;
965 unsigned char *encodedPoint = NULL;
966 int encoded_pt_len = 0;
967 BN_CTX * bn_ctx = NULL;
970 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
972 d=(unsigned char *)s->init_buf->data;
973 p= &(d[DTLS1_HM_HEADER_LENGTH]);
975 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
977 /* Fool emacs indentation */
979 #ifndef OPENSSL_NO_RSA
980 else if (alg_k & SSL_kRSA)
983 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
985 if (s->session->sess_cert == NULL)
987 /* We should always have a server certificate with SSL_kRSA. */
988 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
992 if (s->session->sess_cert->peer_rsa_tmp != NULL)
993 rsa=s->session->sess_cert->peer_rsa_tmp;
996 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
997 if ((pkey == NULL) ||
998 (pkey->type != EVP_PKEY_RSA) ||
999 (pkey->pkey.rsa == NULL))
1001 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1005 EVP_PKEY_free(pkey);
1008 tmp_buf[0]=s->client_version>>8;
1009 tmp_buf[1]=s->client_version&0xff;
1010 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1013 s->session->master_key_length=sizeof tmp_buf;
1016 /* Fix buf for TLS and [incidentally] DTLS */
1017 if (s->version > SSL3_VERSION)
1019 n=RSA_public_encrypt(sizeof tmp_buf,
1020 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1022 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1023 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1027 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1031 /* Fix buf for TLS and [incidentally] DTLS */
1032 if (s->version > SSL3_VERSION)
1038 s->session->master_key_length=
1039 s->method->ssl3_enc->generate_master_secret(s,
1040 s->session->master_key,
1041 tmp_buf,sizeof tmp_buf);
1042 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1045 #ifndef OPENSSL_NO_KRB5
1046 else if (alg_k & SSL_kKRB5)
1048 krb5_error_code krb5rc;
1049 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1050 /* krb5_data krb5_ap_req; */
1051 krb5_data *enc_ticket;
1052 krb5_data authenticator, *authp = NULL;
1053 EVP_CIPHER_CTX ciph_ctx;
1054 const EVP_CIPHER *enc = NULL;
1055 unsigned char iv[EVP_MAX_IV_LENGTH];
1056 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1057 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1058 + EVP_MAX_IV_LENGTH];
1059 int padl, outl = sizeof(epms);
1061 EVP_CIPHER_CTX_init(&ciph_ctx);
1064 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1066 #endif /* KSSL_DEBUG */
1070 if (KRB5SENDAUTH) authp = &authenticator;
1071 #endif /* KRB5SENDAUTH */
1073 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1075 enc = kssl_map_enc(kssl_ctx->enctype);
1080 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1081 if (krb5rc && kssl_err.text)
1082 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1084 #endif /* KSSL_DEBUG */
1088 ssl3_send_alert(s,SSL3_AL_FATAL,
1089 SSL_AD_HANDSHAKE_FAILURE);
1090 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1095 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1096 ** in place of RFC 2712 KerberosWrapper, as in:
1098 ** Send ticket (copy to *p, set n = length)
1099 ** n = krb5_ap_req.length;
1100 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1101 ** if (krb5_ap_req.data)
1102 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1104 ** Now using real RFC 2712 KerberosWrapper
1105 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1106 ** Note: 2712 "opaque" types are here replaced
1107 ** with a 2-byte length followed by the value.
1109 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1110 ** Where "xx xx" = length bytes. Shown here with
1111 ** optional authenticator omitted.
1114 /* KerberosWrapper.Ticket */
1115 s2n(enc_ticket->length,p);
1116 memcpy(p, enc_ticket->data, enc_ticket->length);
1117 p+= enc_ticket->length;
1118 n = enc_ticket->length + 2;
1120 /* KerberosWrapper.Authenticator */
1121 if (authp && authp->length)
1123 s2n(authp->length,p);
1124 memcpy(p, authp->data, authp->length);
1126 n+= authp->length + 2;
1134 s2n(0,p);/* null authenticator length */
1138 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1141 /* 20010420 VRS. Tried it this way; failed.
1142 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1143 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1144 ** kssl_ctx->length);
1145 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1148 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1149 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1151 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1153 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1155 if (outl > (int)sizeof epms)
1157 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1160 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1162 /* KerberosWrapper.EncryptedPreMasterSecret */
1164 memcpy(p, epms, outl);
1168 s->session->master_key_length=
1169 s->method->ssl3_enc->generate_master_secret(s,
1170 s->session->master_key,
1171 tmp_buf, sizeof tmp_buf);
1173 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1174 OPENSSL_cleanse(epms, outl);
1177 #ifndef OPENSSL_NO_DH
1178 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1180 DH *dh_srvr,*dh_clnt;
1182 if (s->session->sess_cert == NULL)
1184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1185 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1189 if (s->session->sess_cert->peer_dh_tmp != NULL)
1190 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1193 /* we get them from the cert */
1194 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1195 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1199 /* generate a new random key */
1200 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1202 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1205 if (!DH_generate_key(dh_clnt))
1207 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1211 /* use the 'p' output buffer for the DH key, but
1212 * make sure to clear it out afterwards */
1214 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1218 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1222 /* generate master key from the result */
1223 s->session->master_key_length=
1224 s->method->ssl3_enc->generate_master_secret(s,
1225 s->session->master_key,p,n);
1229 /* send off the data */
1230 n=BN_num_bytes(dh_clnt->pub_key);
1232 BN_bn2bin(dh_clnt->pub_key,p);
1237 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1240 #ifndef OPENSSL_NO_ECDH
1241 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1243 const EC_GROUP *srvr_group = NULL;
1245 int ecdh_clnt_cert = 0;
1248 if (s->session->sess_cert == NULL)
1250 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1251 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1255 /* Did we send out the client's
1256 * ECDH share for use in premaster
1257 * computation as part of client certificate?
1258 * If so, set ecdh_clnt_cert to 1.
1260 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1262 /* XXX: For now, we do not support client
1263 * authentication using ECDH certificates.
1264 * To add such support, one needs to add
1265 * code that checks for appropriate
1266 * conditions and sets ecdh_clnt_cert to 1.
1267 * For example, the cert have an ECC
1268 * key on the same curve as the server's
1269 * and the key should be authorized for
1272 * One also needs to add code in ssl3_connect
1273 * to skip sending the certificate verify
1276 * if ((s->cert->key->privatekey != NULL) &&
1277 * (s->cert->key->privatekey->type ==
1278 * EVP_PKEY_EC) && ...)
1279 * ecdh_clnt_cert = 1;
1283 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1285 tkey = s->session->sess_cert->peer_ecdh_tmp;
1289 /* Get the Server Public Key from Cert */
1290 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1291 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1292 if ((srvr_pub_pkey == NULL) ||
1293 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1294 (srvr_pub_pkey->pkey.ec == NULL))
1296 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1297 ERR_R_INTERNAL_ERROR);
1301 tkey = srvr_pub_pkey->pkey.ec;
1304 srvr_group = EC_KEY_get0_group(tkey);
1305 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1307 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1309 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1310 ERR_R_INTERNAL_ERROR);
1314 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1316 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1320 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1322 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1327 /* Reuse key info from our certificate
1328 * We only need our private key to perform
1329 * the ECDH computation.
1331 const BIGNUM *priv_key;
1332 tkey = s->cert->key->privatekey->pkey.ec;
1333 priv_key = EC_KEY_get0_private_key(tkey);
1334 if (priv_key == NULL)
1336 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1339 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1341 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1347 /* Generate a new ECDH key pair */
1348 if (!(EC_KEY_generate_key(clnt_ecdh)))
1350 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1355 /* use the 'p' output buffer for the ECDH key, but
1356 * make sure to clear it out afterwards
1359 field_size = EC_GROUP_get_degree(srvr_group);
1360 if (field_size <= 0)
1362 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1366 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1369 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1374 /* generate master key from the result */
1375 s->session->master_key_length = s->method->ssl3_enc \
1376 -> generate_master_secret(s,
1377 s->session->master_key,
1380 memset(p, 0, n); /* clean up */
1384 /* Send empty client key exch message */
1389 /* First check the size of encoding and
1390 * allocate memory accordingly.
1393 EC_POINT_point2oct(srvr_group,
1394 EC_KEY_get0_public_key(clnt_ecdh),
1395 POINT_CONVERSION_UNCOMPRESSED,
1398 encodedPoint = (unsigned char *)
1399 OPENSSL_malloc(encoded_pt_len *
1400 sizeof(unsigned char));
1401 bn_ctx = BN_CTX_new();
1402 if ((encodedPoint == NULL) ||
1405 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1409 /* Encode the public key */
1410 n = EC_POINT_point2oct(srvr_group,
1411 EC_KEY_get0_public_key(clnt_ecdh),
1412 POINT_CONVERSION_UNCOMPRESSED,
1413 encodedPoint, encoded_pt_len, bn_ctx);
1415 *p = n; /* length of encoded point */
1416 /* Encoded point will be copied here */
1418 /* copy the point */
1419 memcpy((unsigned char *)p, encodedPoint, n);
1420 /* increment n to account for length field */
1424 /* Free allocated memory */
1425 BN_CTX_free(bn_ctx);
1426 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1427 if (clnt_ecdh != NULL)
1428 EC_KEY_free(clnt_ecdh);
1429 EVP_PKEY_free(srvr_pub_pkey);
1431 #endif /* !OPENSSL_NO_ECDH */
1433 #ifndef OPENSSL_NO_PSK
1434 else if (alg_k & SSL_kPSK)
1436 char identity[PSK_MAX_IDENTITY_LEN];
1437 unsigned char *t = NULL;
1438 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1439 unsigned int pre_ms_len = 0, psk_len = 0;
1443 if (s->psk_client_callback == NULL)
1445 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1446 SSL_R_PSK_NO_CLIENT_CB);
1450 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1451 identity, PSK_MAX_IDENTITY_LEN,
1452 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1453 if (psk_len > PSK_MAX_PSK_LEN)
1455 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1456 ERR_R_INTERNAL_ERROR);
1459 else if (psk_len == 0)
1461 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1462 SSL_R_PSK_IDENTITY_NOT_FOUND);
1466 /* create PSK pre_master_secret */
1467 pre_ms_len = 2+psk_len+2+psk_len;
1469 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1471 memset(t, 0, psk_len);
1475 if (s->session->psk_identity_hint != NULL)
1476 OPENSSL_free(s->session->psk_identity_hint);
1477 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1478 if (s->ctx->psk_identity_hint != NULL &&
1479 s->session->psk_identity_hint == NULL)
1481 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1482 ERR_R_MALLOC_FAILURE);
1486 if (s->session->psk_identity != NULL)
1487 OPENSSL_free(s->session->psk_identity);
1488 s->session->psk_identity = BUF_strdup(identity);
1489 if (s->session->psk_identity == NULL)
1491 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1492 ERR_R_MALLOC_FAILURE);
1496 s->session->master_key_length =
1497 s->method->ssl3_enc->generate_master_secret(s,
1498 s->session->master_key,
1499 psk_or_pre_ms, pre_ms_len);
1500 n = strlen(identity);
1502 memcpy(p, identity, n);
1506 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1507 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1510 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1517 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1518 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1522 d = dtls1_set_message_header(s, d,
1523 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1525 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1527 l2n(s->d1->handshake_write_seq,d);
1528 s->d1->handshake_write_seq++;
1531 s->state=SSL3_ST_CW_KEY_EXCH_B;
1532 /* number of bytes to write */
1533 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1536 /* buffer the message to handle re-xmits */
1537 dtls1_buffer_message(s, 0);
1540 /* SSL3_ST_CW_KEY_EXCH_B */
1541 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1543 #ifndef OPENSSL_NO_ECDH
1544 BN_CTX_free(bn_ctx);
1545 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1546 if (clnt_ecdh != NULL)
1547 EC_KEY_free(clnt_ecdh);
1548 EVP_PKEY_free(srvr_pub_pkey);
1553 int dtls1_send_client_verify(SSL *s)
1555 unsigned char *p,*d;
1556 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1558 #ifndef OPENSSL_NO_RSA
1562 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1566 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1568 d=(unsigned char *)s->init_buf->data;
1569 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1570 pkey=s->cert->key->privatekey;
1572 s->method->ssl3_enc->cert_verify_mac(s,
1574 &(data[MD5_DIGEST_LENGTH]));
1576 #ifndef OPENSSL_NO_RSA
1577 if (pkey->type == EVP_PKEY_RSA)
1579 s->method->ssl3_enc->cert_verify_mac(s,
1582 if (RSA_sign(NID_md5_sha1, data,
1583 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1584 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1586 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1594 #ifndef OPENSSL_NO_DSA
1595 if (pkey->type == EVP_PKEY_DSA)
1597 if (!DSA_sign(pkey->save_type,
1598 &(data[MD5_DIGEST_LENGTH]),
1599 SHA_DIGEST_LENGTH,&(p[2]),
1600 (unsigned int *)&j,pkey->pkey.dsa))
1602 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1610 #ifndef OPENSSL_NO_ECDSA
1611 if (pkey->type == EVP_PKEY_EC)
1613 if (!ECDSA_sign(pkey->save_type,
1614 &(data[MD5_DIGEST_LENGTH]),
1615 SHA_DIGEST_LENGTH,&(p[2]),
1616 (unsigned int *)&j,pkey->pkey.ec))
1618 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1628 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1632 d = dtls1_set_message_header(s, d,
1633 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1635 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1638 /* buffer the message to handle re-xmits */
1639 dtls1_buffer_message(s, 0);
1641 s->state = SSL3_ST_CW_CERT_VRFY_B;
1644 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1645 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1650 int dtls1_send_client_certificate(SSL *s)
1653 EVP_PKEY *pkey=NULL;
1657 if (s->state == SSL3_ST_CW_CERT_A)
1659 if ((s->cert == NULL) ||
1660 (s->cert->key->x509 == NULL) ||
1661 (s->cert->key->privatekey == NULL))
1662 s->state=SSL3_ST_CW_CERT_B;
1664 s->state=SSL3_ST_CW_CERT_C;
1667 /* We need to get a client cert */
1668 if (s->state == SSL3_ST_CW_CERT_B)
1670 /* If we get an error, we need to
1671 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1672 * We then get retied later */
1674 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1677 s->rwstate=SSL_X509_LOOKUP;
1680 s->rwstate=SSL_NOTHING;
1681 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1683 s->state=SSL3_ST_CW_CERT_B;
1684 if ( !SSL_use_certificate(s,x509) ||
1685 !SSL_use_PrivateKey(s,pkey))
1691 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1694 if (x509 != NULL) X509_free(x509);
1695 if (pkey != NULL) EVP_PKEY_free(pkey);
1698 if (s->version == SSL3_VERSION)
1700 s->s3->tmp.cert_req=0;
1701 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1706 s->s3->tmp.cert_req=2;
1710 /* Ok, we have a cert */
1711 s->state=SSL3_ST_CW_CERT_C;
1714 if (s->state == SSL3_ST_CW_CERT_C)
1716 s->state=SSL3_ST_CW_CERT_D;
1717 l=dtls1_output_cert_chain(s,
1718 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1722 /* set header called by dtls1_output_cert_chain() */
1724 /* buffer the message to handle re-xmits */
1725 dtls1_buffer_message(s, 0);
1727 /* SSL3_ST_CW_CERT_D */
1728 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));