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 #include <openssl/buffer.h>
119 #include <openssl/rand.h>
120 #include <openssl/objects.h>
121 #include <openssl/evp.h>
122 #include <openssl/x509.h>
123 #include <openssl/md5.h>
124 #include <openssl/bn.h>
125 #ifndef OPENSSL_NO_DH
126 #include <openssl/dh.h>
129 static const SSL_METHOD *dtls1_get_server_method(int ver);
130 static int dtls1_send_hello_verify_request(SSL *s);
132 static const SSL_METHOD *dtls1_get_server_method(int ver)
134 if (ver == DTLS1_VERSION)
135 return(DTLSv1_server_method());
140 IMPLEMENT_dtls1_meth_func(DTLSv1_server_method,
142 ssl_undefined_function,
143 dtls1_get_server_method)
145 int dtls1_accept(SSL *s)
148 unsigned long Time=(unsigned long)time(NULL);
149 void (*cb)(const SSL *ssl,int type,int val)=NULL;
152 int new_state,state,skip=0;
155 RAND_add(&Time,sizeof(Time),0);
159 if (s->info_callback != NULL)
161 else if (s->ctx->info_callback != NULL)
162 cb=s->ctx->info_callback;
164 listen = s->d1->listen;
166 /* init things to blank */
168 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
172 SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
182 case SSL_ST_RENEGOTIATE:
184 /* s->state=SSL_ST_ACCEPT; */
188 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
189 case SSL_ST_OK|SSL_ST_ACCEPT:
192 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
194 if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00))
196 SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR);
199 s->type=SSL_ST_ACCEPT;
201 if (s->init_buf == NULL)
203 if ((buf=BUF_MEM_new()) == NULL)
208 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
216 if (!ssl3_setup_buffers(s))
224 if (s->state != SSL_ST_RENEGOTIATE)
226 /* Ok, we now need to push on a buffering BIO so that
227 * the output is sent in a way that TCP likes :-)
229 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
231 ssl3_init_finished_mac(s);
232 s->state=SSL3_ST_SR_CLNT_HELLO_A;
233 s->ctx->stats.sess_accept++;
237 /* s->state == SSL_ST_RENEGOTIATE,
238 * we will just send a HelloRequest */
239 s->ctx->stats.sess_accept_renegotiate++;
240 s->state=SSL3_ST_SW_HELLO_REQ_A;
245 case SSL3_ST_SW_HELLO_REQ_A:
246 case SSL3_ST_SW_HELLO_REQ_B:
249 dtls1_start_timer(s);
250 ret=dtls1_send_hello_request(s);
251 if (ret <= 0) goto end;
252 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
253 s->state=SSL3_ST_SW_FLUSH;
256 ssl3_init_finished_mac(s);
259 case SSL3_ST_SW_HELLO_REQ_C:
263 case SSL3_ST_SR_CLNT_HELLO_A:
264 case SSL3_ST_SR_CLNT_HELLO_B:
265 case SSL3_ST_SR_CLNT_HELLO_C:
268 ret=ssl3_get_client_hello(s);
269 if (ret <= 0) goto end;
272 if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
273 s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A;
275 s->state = SSL3_ST_SW_SRVR_HELLO_A;
279 /* If we're just listening, stop here */
280 if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A)
284 /* Set expected sequence numbers
285 * to continue the handshake.
287 s->d1->handshake_read_seq = 2;
288 s->d1->handshake_write_seq = 1;
289 s->d1->next_handshake_write_seq = 1;
295 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
296 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
298 dtls1_start_timer(s);
299 ret = dtls1_send_hello_verify_request(s);
300 if ( ret <= 0) goto end;
301 s->state=SSL3_ST_SW_FLUSH;
302 s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
304 /* HelloVerifyRequest resets Finished MAC */
305 if (s->version != DTLS1_BAD_VER)
306 ssl3_init_finished_mac(s);
309 case SSL3_ST_SW_SRVR_HELLO_A:
310 case SSL3_ST_SW_SRVR_HELLO_B:
312 dtls1_start_timer(s);
313 ret=dtls1_send_server_hello(s);
314 if (ret <= 0) goto end;
316 #ifndef OPENSSL_NO_TLSEXT
319 if (s->tlsext_ticket_expected)
320 s->state=SSL3_ST_SW_SESSION_TICKET_A;
322 s->state=SSL3_ST_SW_CHANGE_A;
326 s->state=SSL3_ST_SW_CHANGE_A;
329 s->state=SSL3_ST_SW_CERT_A;
333 case SSL3_ST_SW_CERT_A:
334 case SSL3_ST_SW_CERT_B:
335 /* Check if it is anon DH or normal PSK */
336 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
337 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
339 dtls1_start_timer(s);
340 ret=dtls1_send_server_certificate(s);
341 if (ret <= 0) goto end;
342 #ifndef OPENSSL_NO_TLSEXT
343 if (s->tlsext_status_expected)
344 s->state=SSL3_ST_SW_CERT_STATUS_A;
346 s->state=SSL3_ST_SW_KEY_EXCH_A;
351 s->state=SSL3_ST_SW_KEY_EXCH_A;
358 s->state=SSL3_ST_SW_KEY_EXCH_A;
363 case SSL3_ST_SW_KEY_EXCH_A:
364 case SSL3_ST_SW_KEY_EXCH_B:
365 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
367 /* clear this, it may get reset by
368 * send_server_key_exchange */
369 if ((s->options & SSL_OP_EPHEMERAL_RSA)
370 #ifndef OPENSSL_NO_KRB5
371 && !(alg_k & SSL_kKRB5)
372 #endif /* OPENSSL_NO_KRB5 */
374 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
375 * even when forbidden by protocol specs
376 * (handshake may fail as clients are not required to
377 * be able to handle this) */
378 s->s3->tmp.use_rsa_tmp=1;
380 s->s3->tmp.use_rsa_tmp=0;
382 /* only send if a DH key exchange or
383 * RSA but we have a sign only certificate */
384 if (s->s3->tmp.use_rsa_tmp
385 /* PSK: send ServerKeyExchange if PSK identity
386 * hint if provided */
387 #ifndef OPENSSL_NO_PSK
388 || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
390 || (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
391 || (alg_k & SSL_kEECDH)
392 || ((alg_k & SSL_kRSA)
393 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
394 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
395 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
401 dtls1_start_timer(s);
402 ret=dtls1_send_server_key_exchange(s);
403 if (ret <= 0) goto end;
408 s->state=SSL3_ST_SW_CERT_REQ_A;
412 case SSL3_ST_SW_CERT_REQ_A:
413 case SSL3_ST_SW_CERT_REQ_B:
414 if (/* don't request cert unless asked for it: */
415 !(s->verify_mode & SSL_VERIFY_PEER) ||
416 /* if SSL_VERIFY_CLIENT_ONCE is set,
417 * don't request cert during re-negotiation: */
418 ((s->session->peer != NULL) &&
419 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
420 /* never request cert in anonymous ciphersuites
421 * (see section "Certificate request" in SSL 3 drafts
422 * and in RFC 2246): */
423 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
424 /* ... except when the application insists on verification
425 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
426 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
427 /* never request cert in Kerberos ciphersuites */
428 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
429 /* With normal PSK Certificates and
430 * Certificate Requests are omitted */
431 || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
433 /* no cert request */
435 s->s3->tmp.cert_request=0;
436 s->state=SSL3_ST_SW_SRVR_DONE_A;
440 s->s3->tmp.cert_request=1;
441 dtls1_start_timer(s);
442 ret=dtls1_send_certificate_request(s);
443 if (ret <= 0) goto end;
444 #ifndef NETSCAPE_HANG_BUG
445 s->state=SSL3_ST_SW_SRVR_DONE_A;
447 s->state=SSL3_ST_SW_FLUSH;
448 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
454 case SSL3_ST_SW_SRVR_DONE_A:
455 case SSL3_ST_SW_SRVR_DONE_B:
456 dtls1_start_timer(s);
457 ret=dtls1_send_server_done(s);
458 if (ret <= 0) goto end;
459 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
460 s->state=SSL3_ST_SW_FLUSH;
464 case SSL3_ST_SW_FLUSH:
465 s->rwstate=SSL_WRITING;
466 if (BIO_flush(s->wbio) <= 0)
471 s->rwstate=SSL_NOTHING;
472 s->state=s->s3->tmp.next_state;
475 case SSL3_ST_SR_CERT_A:
476 case SSL3_ST_SR_CERT_B:
477 /* Check for second client hello (MS SGC) */
478 ret = ssl3_check_client_hello(s);
483 s->state = SSL3_ST_SR_CLNT_HELLO_C;
485 /* could be sent for a DH cert, even if we
486 * have not asked for it :-) */
487 ret=ssl3_get_client_certificate(s);
488 if (ret <= 0) goto end;
491 s->state=SSL3_ST_SR_KEY_EXCH_A;
495 case SSL3_ST_SR_KEY_EXCH_A:
496 case SSL3_ST_SR_KEY_EXCH_B:
497 ret=ssl3_get_client_key_exchange(s);
498 if (ret <= 0) goto end;
500 s->state=SSL3_ST_SR_CERT_VRFY_A;
505 /* For the ECDH ciphersuites when
506 * the client sends its ECDH pub key in
507 * a certificate, the CertificateVerify
508 * message is not sent.
510 s->state=SSL3_ST_SR_FINISHED_A;
515 s->state=SSL3_ST_SR_CERT_VRFY_A;
518 /* We need to get hashes here so if there is
519 * a client cert, it can be verified */
520 s->method->ssl3_enc->cert_verify_mac(s,
522 &(s->s3->tmp.cert_verify_md[0]));
523 s->method->ssl3_enc->cert_verify_mac(s,
525 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
529 case SSL3_ST_SR_CERT_VRFY_A:
530 case SSL3_ST_SR_CERT_VRFY_B:
532 s->d1->change_cipher_spec_ok = 1;
533 /* we should decide if we expected this one */
534 ret=ssl3_get_cert_verify(s);
535 if (ret <= 0) goto end;
538 s->state=SSL3_ST_SR_FINISHED_A;
542 case SSL3_ST_SR_FINISHED_A:
543 case SSL3_ST_SR_FINISHED_B:
544 s->d1->change_cipher_spec_ok = 1;
545 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
546 SSL3_ST_SR_FINISHED_B);
547 if (ret <= 0) goto end;
551 #ifndef OPENSSL_NO_TLSEXT
552 else if (s->tlsext_ticket_expected)
553 s->state=SSL3_ST_SW_SESSION_TICKET_A;
556 s->state=SSL3_ST_SW_CHANGE_A;
560 #ifndef OPENSSL_NO_TLSEXT
561 case SSL3_ST_SW_SESSION_TICKET_A:
562 case SSL3_ST_SW_SESSION_TICKET_B:
563 ret=dtls1_send_newsession_ticket(s);
564 if (ret <= 0) goto end;
565 s->state=SSL3_ST_SW_CHANGE_A;
569 case SSL3_ST_SW_CERT_STATUS_A:
570 case SSL3_ST_SW_CERT_STATUS_B:
571 ret=ssl3_send_cert_status(s);
572 if (ret <= 0) goto end;
573 s->state=SSL3_ST_SW_KEY_EXCH_A;
579 case SSL3_ST_SW_CHANGE_A:
580 case SSL3_ST_SW_CHANGE_B:
582 s->session->cipher=s->s3->tmp.new_cipher;
583 if (!s->method->ssl3_enc->setup_key_block(s))
584 { ret= -1; goto end; }
586 ret=dtls1_send_change_cipher_spec(s,
587 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
589 if (ret <= 0) goto end;
590 s->state=SSL3_ST_SW_FINISHED_A;
593 if (!s->method->ssl3_enc->change_cipher_state(s,
594 SSL3_CHANGE_CIPHER_SERVER_WRITE))
600 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
603 case SSL3_ST_SW_FINISHED_A:
604 case SSL3_ST_SW_FINISHED_B:
605 ret=dtls1_send_finished(s,
606 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
607 s->method->ssl3_enc->server_finished_label,
608 s->method->ssl3_enc->server_finished_label_len);
609 if (ret <= 0) goto end;
610 s->state=SSL3_ST_SW_FLUSH;
612 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
614 s->s3->tmp.next_state=SSL_ST_OK;
619 /* clean a few things up */
620 ssl3_cleanup_key_block(s);
623 BUF_MEM_free(s->init_buf);
627 /* remove buffering on output */
628 ssl_free_wbio_buffer(s);
632 if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
634 /* actually not necessarily a 'new' session unless
635 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
640 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
642 s->ctx->stats.sess_accept_good++;
644 s->handshake_func=dtls1_accept;
646 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
651 /* done handshaking, next message is client hello */
652 s->d1->handshake_read_seq = 0;
653 /* next message is server hello */
654 s->d1->handshake_write_seq = 0;
655 s->d1->next_handshake_write_seq = 0;
660 SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE);
666 if (!s->s3->tmp.reuse_message && !skip)
670 if ((ret=BIO_flush(s->wbio)) <= 0)
675 if ((cb != NULL) && (s->state != state))
679 cb(s,SSL_CB_ACCEPT_LOOP,1);
686 /* BIO_flush(s->wbio); */
690 cb(s,SSL_CB_ACCEPT_EXIT,ret);
694 int dtls1_send_hello_request(SSL *s)
698 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
700 p=(unsigned char *)s->init_buf->data;
701 p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0);
703 s->state=SSL3_ST_SW_HELLO_REQ_B;
704 /* number of bytes to write */
705 s->init_num=DTLS1_HM_HEADER_LENGTH;
708 /* no need to buffer this message, since there are no retransmit
712 /* SSL3_ST_SW_HELLO_REQ_B */
713 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
716 int dtls1_send_hello_verify_request(SSL *s)
718 unsigned int msg_len;
719 unsigned char *msg, *buf, *p;
721 if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A)
723 buf = (unsigned char *)s->init_buf->data;
725 msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
726 *(p++) = s->version >> 8;
727 *(p++) = s->version & 0xFF;
729 if (s->ctx->app_gen_cookie_cb == NULL ||
730 s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
731 &(s->d1->cookie_len)) == 0)
733 SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR);
737 *(p++) = (unsigned char) s->d1->cookie_len;
738 memcpy(p, s->d1->cookie, s->d1->cookie_len);
739 p += s->d1->cookie_len;
742 dtls1_set_message_header(s, buf,
743 DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len);
745 s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
746 /* number of bytes to write */
751 /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
752 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
755 int dtls1_send_server_hello(SSL *s)
761 unsigned long l,Time;
763 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
765 buf=(unsigned char *)s->init_buf->data;
766 p=s->s3->server_random;
767 Time=(unsigned long)time(NULL); /* Time */
769 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
770 /* Do the message type and length last */
771 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
773 *(p++)=s->version>>8;
774 *(p++)=s->version&0xff;
777 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
780 /* now in theory we have 3 options to sending back the
781 * session id. If it is a re-use, we send back the
782 * old session-id, if it is a new session, we send
783 * back the new session-id or we send back a 0 length
784 * session-id if we want it to be single use.
785 * Currently I will not implement the '0' length session-id
786 * 12-Jan-98 - I'll now support the '0' length stuff.
788 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
789 s->session->session_id_length=0;
791 sl=s->session->session_id_length;
792 if (sl > sizeof s->session->session_id)
794 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
798 memcpy(p,s->session->session_id,sl);
802 if (s->s3->tmp.new_cipher == NULL)
804 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
807 /* put the compression method */
808 #ifdef OPENSSL_NO_COMP
811 if (s->s3->tmp.new_compression == NULL)
814 *(p++)=s->s3->tmp.new_compression->id;
817 #ifndef OPENSSL_NO_TLSEXT
818 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
820 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
829 d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l);
831 s->state=SSL3_ST_SW_SRVR_HELLO_B;
832 /* number of bytes to write */
836 /* buffer the message to handle re-xmits */
837 dtls1_buffer_message(s, 0);
840 /* SSL3_ST_SW_SRVR_HELLO_B */
841 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
844 int dtls1_send_server_done(SSL *s)
848 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
850 p=(unsigned char *)s->init_buf->data;
853 p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0);
855 s->state=SSL3_ST_SW_SRVR_DONE_B;
856 /* number of bytes to write */
857 s->init_num=DTLS1_HM_HEADER_LENGTH;
860 /* buffer the message to handle re-xmits */
861 dtls1_buffer_message(s, 0);
864 /* SSL3_ST_SW_SRVR_DONE_B */
865 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
868 int dtls1_send_server_key_exchange(SSL *s)
870 #ifndef OPENSSL_NO_RSA
874 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
877 #ifndef OPENSSL_NO_DH
880 #ifndef OPENSSL_NO_ECDH
881 EC_KEY *ecdh=NULL, *ecdhp;
882 unsigned char *encodedPoint = NULL;
885 BN_CTX *bn_ctx = NULL;
898 EVP_MD_CTX_init(&md_ctx);
899 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
901 type=s->s3->tmp.new_cipher->algorithm_mkey;
906 r[0]=r[1]=r[2]=r[3]=NULL;
908 #ifndef OPENSSL_NO_RSA
912 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
914 rsa=s->cert->rsa_tmp_cb(s,
915 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
916 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
919 al=SSL_AD_HANDSHAKE_FAILURE;
920 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
928 al=SSL_AD_HANDSHAKE_FAILURE;
929 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
934 s->s3->tmp.use_rsa_tmp=1;
938 #ifndef OPENSSL_NO_DH
942 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
943 dhp=s->cert->dh_tmp_cb(s,
944 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
945 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
948 al=SSL_AD_HANDSHAKE_FAILURE;
949 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
953 if (s->s3->tmp.dh != NULL)
956 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
960 if ((dh=DHparams_dup(dhp)) == NULL)
962 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
967 if ((dhp->pub_key == NULL ||
968 dhp->priv_key == NULL ||
969 (s->options & SSL_OP_SINGLE_DH_USE)))
971 if(!DH_generate_key(dh))
973 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,
980 dh->pub_key=BN_dup(dhp->pub_key);
981 dh->priv_key=BN_dup(dhp->priv_key);
982 if ((dh->pub_key == NULL) ||
983 (dh->priv_key == NULL))
985 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
995 #ifndef OPENSSL_NO_ECDH
996 if (type & SSL_kEECDH)
998 const EC_GROUP *group;
1000 ecdhp=cert->ecdh_tmp;
1001 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1003 ecdhp=s->cert->ecdh_tmp_cb(s,
1004 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1005 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1009 al=SSL_AD_HANDSHAKE_FAILURE;
1010 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1014 if (s->s3->tmp.ecdh != NULL)
1016 EC_KEY_free(s->s3->tmp.ecdh);
1017 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1021 /* Duplicate the ECDH structure. */
1024 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1027 if (!EC_KEY_up_ref(ecdhp))
1029 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1034 s->s3->tmp.ecdh=ecdh;
1035 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1036 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1037 (s->options & SSL_OP_SINGLE_ECDH_USE))
1039 if(!EC_KEY_generate_key(ecdh))
1041 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1046 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1047 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1048 (EC_KEY_get0_private_key(ecdh) == NULL))
1050 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1054 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1055 (EC_GROUP_get_degree(group) > 163))
1057 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1061 /* XXX: For now, we only support ephemeral ECDH
1062 * keys over named (not generic) curves. For
1063 * supported named curves, curve_id is non-zero.
1066 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1069 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1073 /* Encode the public key.
1074 * First check the size of encoding and
1075 * allocate memory accordingly.
1077 encodedlen = EC_POINT_point2oct(group,
1078 EC_KEY_get0_public_key(ecdh),
1079 POINT_CONVERSION_UNCOMPRESSED,
1082 encodedPoint = (unsigned char *)
1083 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1084 bn_ctx = BN_CTX_new();
1085 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1087 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1092 encodedlen = EC_POINT_point2oct(group,
1093 EC_KEY_get0_public_key(ecdh),
1094 POINT_CONVERSION_UNCOMPRESSED,
1095 encodedPoint, encodedlen, bn_ctx);
1097 if (encodedlen == 0)
1099 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1103 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1105 /* XXX: For now, we only support named (not
1106 * generic) curves in ECDH ephemeral key exchanges.
1107 * In this situation, we need four additional bytes
1108 * to encode the entire ServerECDHParams
1113 /* We'll generate the serverKeyExchange message
1114 * explicitly so we can set these to NULLs
1122 #endif /* !OPENSSL_NO_ECDH */
1123 #ifndef OPENSSL_NO_PSK
1124 if (type & SSL_kPSK)
1126 /* reserve size for record length and PSK identity hint*/
1127 n+=2+strlen(s->ctx->psk_identity_hint);
1130 #endif /* !OPENSSL_NO_PSK */
1132 al=SSL_AD_HANDSHAKE_FAILURE;
1133 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1136 for (i=0; r[i] != NULL; i++)
1138 nr[i]=BN_num_bytes(r[i]);
1142 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1143 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
1145 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher, NULL))
1148 al=SSL_AD_DECODE_ERROR;
1151 kn=EVP_PKEY_size(pkey);
1159 if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn))
1161 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1164 d=(unsigned char *)s->init_buf->data;
1165 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1167 for (i=0; r[i] != NULL; i++)
1174 #ifndef OPENSSL_NO_ECDH
1175 if (type & SSL_kEECDH)
1177 /* XXX: For now, we only support named (not generic) curves.
1178 * In this situation, the serverKeyExchange message has:
1179 * [1 byte CurveType], [2 byte CurveName]
1180 * [1 byte length of encoded point], followed by
1181 * the actual encoded point itself
1183 *p = NAMED_CURVE_TYPE;
1191 memcpy((unsigned char*)p,
1192 (unsigned char *)encodedPoint,
1194 OPENSSL_free(encodedPoint);
1199 #ifndef OPENSSL_NO_PSK
1200 if (type & SSL_kPSK)
1202 /* copy PSK identity hint */
1203 s2n(strlen(s->ctx->psk_identity_hint), p);
1204 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1205 p+=strlen(s->ctx->psk_identity_hint);
1212 /* n is the length of the params, they start at
1213 * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space
1215 #ifndef OPENSSL_NO_RSA
1216 if (pkey->type == EVP_PKEY_RSA)
1220 for (num=2; num > 0; num--)
1222 EVP_DigestInit_ex(&md_ctx,(num == 2)
1223 ?s->ctx->md5:s->ctx->sha1, NULL);
1224 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1225 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1226 EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
1227 EVP_DigestFinal_ex(&md_ctx,q,
1228 (unsigned int *)&i);
1232 if (RSA_sign(NID_md5_sha1, md_buf, j,
1233 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1235 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1243 #if !defined(OPENSSL_NO_DSA)
1244 if (pkey->type == EVP_PKEY_DSA)
1247 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1248 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1249 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1250 EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
1251 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1252 (unsigned int *)&i,pkey))
1254 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1262 #if !defined(OPENSSL_NO_ECDSA)
1263 if (pkey->type == EVP_PKEY_EC)
1265 /* let's do ECDSA */
1266 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1267 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1268 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1269 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1270 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1271 (unsigned int *)&i,pkey))
1273 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1282 /* Is this error check actually needed? */
1283 al=SSL_AD_HANDSHAKE_FAILURE;
1284 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1289 d = dtls1_set_message_header(s, d,
1290 SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n);
1292 /* we should now have things packed up, so lets send
1294 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1297 /* buffer the message to handle re-xmits */
1298 dtls1_buffer_message(s, 0);
1301 s->state = SSL3_ST_SW_KEY_EXCH_B;
1302 EVP_MD_CTX_cleanup(&md_ctx);
1303 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1305 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1307 #ifndef OPENSSL_NO_ECDH
1308 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1309 BN_CTX_free(bn_ctx);
1311 EVP_MD_CTX_cleanup(&md_ctx);
1315 int dtls1_send_certificate_request(SSL *s)
1317 unsigned char *p,*d;
1319 STACK_OF(X509_NAME) *sk=NULL;
1322 unsigned int msg_len;
1324 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1328 d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]);
1330 /* get the list of acceptable cert types */
1332 n=ssl3_get_req_cert_type(s,p);
1341 sk=SSL_get_client_CA_list(s);
1345 for (i=0; i<sk_X509_NAME_num(sk); i++)
1347 name=sk_X509_NAME_value(sk,i);
1348 j=i2d_X509_NAME(name,NULL);
1349 if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2))
1351 SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1354 p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]);
1355 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1358 i2d_X509_NAME(name,&p);
1365 i2d_X509_NAME(name,&p);
1366 j-=2; s2n(j,d); j+=2;
1372 /* else no CA names */
1373 p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]);
1376 d=(unsigned char *)buf->data;
1377 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1379 s2n(s->d1->handshake_write_seq,d);
1380 s->d1->handshake_write_seq++;
1382 /* we should now have things packed up, so lets send
1385 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1387 #ifdef NETSCAPE_HANG_BUG
1388 /* XXX: what to do about this? */
1389 p=(unsigned char *)s->init_buf->data + s->init_num;
1392 *(p++)=SSL3_MT_SERVER_DONE;
1399 /* XDTLS: set message header ? */
1400 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1401 dtls1_set_message_header(s, (void *)s->init_buf->data,
1402 SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len);
1404 /* buffer the message to handle re-xmits */
1405 dtls1_buffer_message(s, 0);
1407 s->state = SSL3_ST_SW_CERT_REQ_B;
1410 /* SSL3_ST_SW_CERT_REQ_B */
1411 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1416 int dtls1_send_server_certificate(SSL *s)
1421 if (s->state == SSL3_ST_SW_CERT_A)
1423 x=ssl_get_server_send_cert(s);
1426 /* VRS: allow null cert if auth == KRB5 */
1427 if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) ||
1428 (s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5))
1430 SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
1435 l=dtls1_output_cert_chain(s,x);
1436 s->state=SSL3_ST_SW_CERT_B;
1440 /* buffer the message to handle re-xmits */
1441 dtls1_buffer_message(s, 0);
1444 /* SSL3_ST_SW_CERT_B */
1445 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1448 #ifndef OPENSSL_NO_TLSEXT
1449 int dtls1_send_newsession_ticket(SSL *s)
1451 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
1453 unsigned char *p, *senc, *macstart;
1455 unsigned int hlen, msg_len;
1458 SSL_CTX *tctx = s->initial_ctx;
1459 unsigned char iv[EVP_MAX_IV_LENGTH];
1460 unsigned char key_name[16];
1462 /* get session encoding length */
1463 slen = i2d_SSL_SESSION(s->session, NULL);
1464 /* Some length values are 16 bits, so forget it if session is
1469 /* Grow buffer if need be: the length calculation is as
1470 * follows 12 (DTLS handshake message header) +
1471 * 4 (ticket lifetime hint) + 2 (ticket length) +
1472 * 16 (key name) + max_iv_len (iv length) +
1473 * session_length + max_enc_block_size (max encrypted session
1474 * length) + max_md_size (HMAC).
1476 if (!BUF_MEM_grow(s->init_buf,
1477 DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH +
1478 EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
1480 senc = OPENSSL_malloc(slen);
1484 i2d_SSL_SESSION(s->session, &p);
1486 p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]);
1487 EVP_CIPHER_CTX_init(&ctx);
1488 HMAC_CTX_init(&hctx);
1489 /* Initialize HMAC and cipher contexts. If callback present
1490 * it does all the work otherwise use generated values
1493 if (tctx->tlsext_ticket_key_cb)
1495 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
1504 RAND_pseudo_bytes(iv, 16);
1505 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1506 tctx->tlsext_tick_aes_key, iv);
1507 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1508 tlsext_tick_md(), NULL);
1509 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
1511 l2n(s->session->tlsext_tick_lifetime_hint, p);
1512 /* Skip ticket length for now */
1514 /* Output key name */
1516 memcpy(p, key_name, 16);
1519 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
1520 p += EVP_CIPHER_CTX_iv_length(&ctx);
1521 /* Encrypt session data */
1522 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
1524 EVP_EncryptFinal(&ctx, p, &len);
1526 EVP_CIPHER_CTX_cleanup(&ctx);
1528 HMAC_Update(&hctx, macstart, p - macstart);
1529 HMAC_Final(&hctx, p, &hlen);
1530 HMAC_CTX_cleanup(&hctx);
1533 /* Now write out lengths: p points to end of data written */
1535 len = p - (unsigned char *)(s->init_buf->data);
1537 p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4;
1538 s2n(len - DTLS1_HM_HEADER_LENGTH - 6, p);
1540 /* number of bytes to write */
1542 s->state=SSL3_ST_SW_SESSION_TICKET_B;
1546 /* XDTLS: set message header ? */
1547 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1548 dtls1_set_message_header(s, (void *)s->init_buf->data,
1549 SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len);
1551 /* buffer the message to handle re-xmits */
1552 dtls1_buffer_message(s, 0);
1555 /* SSL3_ST_SW_SESSION_TICKET_B */
1556 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));