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;
153 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 /* init things to blank */
166 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
170 SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
180 case SSL_ST_RENEGOTIATE:
182 /* s->state=SSL_ST_ACCEPT; */
186 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
187 case SSL_ST_OK|SSL_ST_ACCEPT:
190 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
192 if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00))
194 SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR);
197 s->type=SSL_ST_ACCEPT;
199 if (s->init_buf == NULL)
201 if ((buf=BUF_MEM_new()) == NULL)
206 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
214 if (!ssl3_setup_buffers(s))
222 if (s->state != SSL_ST_RENEGOTIATE)
224 /* Ok, we now need to push on a buffering BIO so that
225 * the output is sent in a way that TCP likes :-)
227 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
229 ssl3_init_finished_mac(s);
230 s->state=SSL3_ST_SR_CLNT_HELLO_A;
231 s->ctx->stats.sess_accept++;
235 /* s->state == SSL_ST_RENEGOTIATE,
236 * we will just send a HelloRequest */
237 s->ctx->stats.sess_accept_renegotiate++;
238 s->state=SSL3_ST_SW_HELLO_REQ_A;
243 case SSL3_ST_SW_HELLO_REQ_A:
244 case SSL3_ST_SW_HELLO_REQ_B:
247 dtls1_start_timer(s);
248 ret=dtls1_send_hello_request(s);
249 if (ret <= 0) goto end;
250 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
251 s->state=SSL3_ST_SW_FLUSH;
254 ssl3_init_finished_mac(s);
257 case SSL3_ST_SW_HELLO_REQ_C:
261 case SSL3_ST_SR_CLNT_HELLO_A:
262 case SSL3_ST_SR_CLNT_HELLO_B:
263 case SSL3_ST_SR_CLNT_HELLO_C:
266 ret=ssl3_get_client_hello(s);
267 if (ret <= 0) goto end;
271 if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
272 s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A;
274 s->state = SSL3_ST_SW_SRVR_HELLO_A;
278 /* If we're just listening, stop here */
279 if (s->d1->listen && s->state == SSL3_ST_SW_SRVR_HELLO_A)
288 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
289 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
291 dtls1_start_timer(s);
292 ret = dtls1_send_hello_verify_request(s);
293 if ( ret <= 0) goto end;
294 s->state=SSL3_ST_SW_FLUSH;
296 s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
298 /* HelloVerifyRequest resets Finished MAC */
299 if (s->version != DTLS1_BAD_VER)
300 ssl3_init_finished_mac(s);
303 case SSL3_ST_SW_SRVR_HELLO_A:
304 case SSL3_ST_SW_SRVR_HELLO_B:
305 dtls1_start_timer(s);
306 ret=dtls1_send_server_hello(s);
307 if (ret <= 0) goto end;
309 #ifndef OPENSSL_NO_TLSEXT
312 if (s->tlsext_ticket_expected)
313 s->state=SSL3_ST_SW_SESSION_TICKET_A;
315 s->state=SSL3_ST_SW_CHANGE_A;
319 s->state=SSL3_ST_SW_CHANGE_A;
322 s->state=SSL3_ST_SW_CERT_A;
326 case SSL3_ST_SW_CERT_A:
327 case SSL3_ST_SW_CERT_B:
328 /* Check if it is anon DH or normal PSK */
329 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
330 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
332 dtls1_start_timer(s);
333 ret=dtls1_send_server_certificate(s);
334 if (ret <= 0) goto end;
335 #ifndef OPENSSL_NO_TLSEXT
336 if (s->tlsext_status_expected)
337 s->state=SSL3_ST_SW_CERT_STATUS_A;
339 s->state=SSL3_ST_SW_KEY_EXCH_A;
344 s->state=SSL3_ST_SW_KEY_EXCH_A;
351 s->state=SSL3_ST_SW_KEY_EXCH_A;
356 case SSL3_ST_SW_KEY_EXCH_A:
357 case SSL3_ST_SW_KEY_EXCH_B:
358 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
360 /* clear this, it may get reset by
361 * send_server_key_exchange */
362 if ((s->options & SSL_OP_EPHEMERAL_RSA)
363 #ifndef OPENSSL_NO_KRB5
364 && !(alg_k & SSL_kKRB5)
365 #endif /* OPENSSL_NO_KRB5 */
367 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
368 * even when forbidden by protocol specs
369 * (handshake may fail as clients are not required to
370 * be able to handle this) */
371 s->s3->tmp.use_rsa_tmp=1;
373 s->s3->tmp.use_rsa_tmp=0;
375 /* only send if a DH key exchange or
376 * RSA but we have a sign only certificate */
377 if (s->s3->tmp.use_rsa_tmp
378 /* PSK: send ServerKeyExchange if PSK identity
379 * hint if provided */
380 #ifndef OPENSSL_NO_PSK
381 || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
383 || (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
384 || (alg_k & SSL_kEECDH)
385 || ((alg_k & SSL_kRSA)
386 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
387 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
388 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
394 dtls1_start_timer(s);
395 ret=dtls1_send_server_key_exchange(s);
396 if (ret <= 0) goto end;
401 s->state=SSL3_ST_SW_CERT_REQ_A;
405 case SSL3_ST_SW_CERT_REQ_A:
406 case SSL3_ST_SW_CERT_REQ_B:
407 if (/* don't request cert unless asked for it: */
408 !(s->verify_mode & SSL_VERIFY_PEER) ||
409 /* if SSL_VERIFY_CLIENT_ONCE is set,
410 * don't request cert during re-negotiation: */
411 ((s->session->peer != NULL) &&
412 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
413 /* never request cert in anonymous ciphersuites
414 * (see section "Certificate request" in SSL 3 drafts
415 * and in RFC 2246): */
416 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
417 /* ... except when the application insists on verification
418 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
419 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
420 /* never request cert in Kerberos ciphersuites */
421 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
422 /* With normal PSK Certificates and
423 * Certificate Requests are omitted */
424 || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
426 /* no cert request */
428 s->s3->tmp.cert_request=0;
429 s->state=SSL3_ST_SW_SRVR_DONE_A;
433 s->s3->tmp.cert_request=1;
434 dtls1_start_timer(s);
435 ret=dtls1_send_certificate_request(s);
436 if (ret <= 0) goto end;
437 #ifndef NETSCAPE_HANG_BUG
438 s->state=SSL3_ST_SW_SRVR_DONE_A;
440 s->state=SSL3_ST_SW_FLUSH;
441 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
447 case SSL3_ST_SW_SRVR_DONE_A:
448 case SSL3_ST_SW_SRVR_DONE_B:
449 dtls1_start_timer(s);
450 ret=dtls1_send_server_done(s);
451 if (ret <= 0) goto end;
452 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
453 s->state=SSL3_ST_SW_FLUSH;
457 case SSL3_ST_SW_FLUSH:
458 /* number of bytes to be flushed */
459 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
462 s->rwstate=SSL_WRITING;
463 num1=BIO_flush(s->wbio);
464 if (num1 <= 0) { ret= -1; goto end; }
465 s->rwstate=SSL_NOTHING;
468 s->state=s->s3->tmp.next_state;
471 case SSL3_ST_SR_CERT_A:
472 case SSL3_ST_SR_CERT_B:
473 /* Check for second client hello (MS SGC) */
474 ret = ssl3_check_client_hello(s);
479 s->state = SSL3_ST_SR_CLNT_HELLO_C;
481 /* could be sent for a DH cert, even if we
482 * have not asked for it :-) */
483 ret=ssl3_get_client_certificate(s);
484 if (ret <= 0) goto end;
487 s->state=SSL3_ST_SR_KEY_EXCH_A;
491 case SSL3_ST_SR_KEY_EXCH_A:
492 case SSL3_ST_SR_KEY_EXCH_B:
493 ret=ssl3_get_client_key_exchange(s);
494 if (ret <= 0) goto end;
496 s->state=SSL3_ST_SR_CERT_VRFY_A;
501 /* For the ECDH ciphersuites when
502 * the client sends its ECDH pub key in
503 * a certificate, the CertificateVerify
504 * message is not sent.
506 s->state=SSL3_ST_SR_FINISHED_A;
511 s->state=SSL3_ST_SR_CERT_VRFY_A;
514 /* We need to get hashes here so if there is
515 * a client cert, it can be verified */
516 s->method->ssl3_enc->cert_verify_mac(s,
518 &(s->s3->tmp.cert_verify_md[0]));
519 s->method->ssl3_enc->cert_verify_mac(s,
521 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
525 case SSL3_ST_SR_CERT_VRFY_A:
526 case SSL3_ST_SR_CERT_VRFY_B:
528 s->d1->change_cipher_spec_ok = 1;
529 /* we should decide if we expected this one */
530 ret=ssl3_get_cert_verify(s);
531 if (ret <= 0) goto end;
534 s->state=SSL3_ST_SR_FINISHED_A;
538 case SSL3_ST_SR_FINISHED_A:
539 case SSL3_ST_SR_FINISHED_B:
540 s->d1->change_cipher_spec_ok = 1;
541 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
542 SSL3_ST_SR_FINISHED_B);
543 if (ret <= 0) goto end;
547 #ifndef OPENSSL_NO_TLSEXT
548 else if (s->tlsext_ticket_expected)
549 s->state=SSL3_ST_SW_SESSION_TICKET_A;
552 s->state=SSL3_ST_SW_CHANGE_A;
556 #ifndef OPENSSL_NO_TLSEXT
557 case SSL3_ST_SW_SESSION_TICKET_A:
558 case SSL3_ST_SW_SESSION_TICKET_B:
559 ret=dtls1_send_newsession_ticket(s);
560 if (ret <= 0) goto end;
561 s->state=SSL3_ST_SW_CHANGE_A;
565 case SSL3_ST_SW_CERT_STATUS_A:
566 case SSL3_ST_SW_CERT_STATUS_B:
567 ret=ssl3_send_cert_status(s);
568 if (ret <= 0) goto end;
569 s->state=SSL3_ST_SW_KEY_EXCH_A;
575 case SSL3_ST_SW_CHANGE_A:
576 case SSL3_ST_SW_CHANGE_B:
578 s->session->cipher=s->s3->tmp.new_cipher;
579 if (!s->method->ssl3_enc->setup_key_block(s))
580 { ret= -1; goto end; }
582 ret=dtls1_send_change_cipher_spec(s,
583 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
585 if (ret <= 0) goto end;
586 s->state=SSL3_ST_SW_FINISHED_A;
589 if (!s->method->ssl3_enc->change_cipher_state(s,
590 SSL3_CHANGE_CIPHER_SERVER_WRITE))
596 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
599 case SSL3_ST_SW_FINISHED_A:
600 case SSL3_ST_SW_FINISHED_B:
601 ret=dtls1_send_finished(s,
602 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
603 s->method->ssl3_enc->server_finished_label,
604 s->method->ssl3_enc->server_finished_label_len);
605 if (ret <= 0) goto end;
606 s->state=SSL3_ST_SW_FLUSH;
608 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
610 s->s3->tmp.next_state=SSL_ST_OK;
615 /* clean a few things up */
616 ssl3_cleanup_key_block(s);
619 BUF_MEM_free(s->init_buf);
623 /* remove buffering on output */
624 ssl_free_wbio_buffer(s);
628 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
630 /* actually not necessarily a 'new' session unless
631 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
635 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
637 s->ctx->stats.sess_accept_good++;
639 s->handshake_func=dtls1_accept;
641 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
646 /* done handshaking, next message is client hello */
647 s->d1->handshake_read_seq = 0;
648 /* next message is server hello */
649 s->d1->handshake_write_seq = 0;
650 s->d1->next_handshake_write_seq = 0;
655 SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE);
661 if (!s->s3->tmp.reuse_message && !skip)
665 if ((ret=BIO_flush(s->wbio)) <= 0)
670 if ((cb != NULL) && (s->state != state))
674 cb(s,SSL_CB_ACCEPT_LOOP,1);
681 /* BIO_flush(s->wbio); */
685 cb(s,SSL_CB_ACCEPT_EXIT,ret);
689 int dtls1_send_hello_request(SSL *s)
693 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
695 p=(unsigned char *)s->init_buf->data;
696 p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0);
698 s->state=SSL3_ST_SW_HELLO_REQ_B;
699 /* number of bytes to write */
700 s->init_num=DTLS1_HM_HEADER_LENGTH;
703 /* no need to buffer this message, since there are no retransmit
707 /* SSL3_ST_SW_HELLO_REQ_B */
708 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
711 int dtls1_send_hello_verify_request(SSL *s)
713 unsigned int msg_len;
714 unsigned char *msg, *buf, *p;
716 if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A)
718 buf = (unsigned char *)s->init_buf->data;
720 msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
721 *(p++) = s->version >> 8;
722 *(p++) = s->version & 0xFF;
724 if (s->ctx->app_gen_cookie_cb == NULL ||
725 s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
726 &(s->d1->cookie_len)) == 0)
728 SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR);
732 *(p++) = (unsigned char) s->d1->cookie_len;
733 memcpy(p, s->d1->cookie, s->d1->cookie_len);
734 p += s->d1->cookie_len;
737 dtls1_set_message_header(s, buf,
738 DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len);
740 s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
741 /* number of bytes to write */
745 /* buffer the message to handle re-xmits */
746 dtls1_buffer_message(s, 0);
749 /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
750 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
753 int dtls1_send_server_hello(SSL *s)
759 unsigned long l,Time;
761 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
763 buf=(unsigned char *)s->init_buf->data;
764 p=s->s3->server_random;
765 Time=(unsigned long)time(NULL); /* Time */
767 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
768 /* Do the message type and length last */
769 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
771 *(p++)=s->version>>8;
772 *(p++)=s->version&0xff;
775 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
778 /* now in theory we have 3 options to sending back the
779 * session id. If it is a re-use, we send back the
780 * old session-id, if it is a new session, we send
781 * back the new session-id or we send back a 0 length
782 * session-id if we want it to be single use.
783 * Currently I will not implement the '0' length session-id
784 * 12-Jan-98 - I'll now support the '0' length stuff.
786 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
787 s->session->session_id_length=0;
789 sl=s->session->session_id_length;
790 if (sl > sizeof s->session->session_id)
792 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
796 memcpy(p,s->session->session_id,sl);
800 if (s->s3->tmp.new_cipher == NULL)
802 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
805 /* put the compression method */
806 #ifdef OPENSSL_NO_COMP
809 if (s->s3->tmp.new_compression == NULL)
812 *(p++)=s->s3->tmp.new_compression->id;
815 #ifndef OPENSSL_NO_TLSEXT
816 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
818 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
827 d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l);
829 s->state=SSL3_ST_SW_SRVR_HELLO_B;
830 /* number of bytes to write */
834 /* buffer the message to handle re-xmits */
835 dtls1_buffer_message(s, 0);
838 /* SSL3_ST_SW_SRVR_HELLO_B */
839 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
842 int dtls1_send_server_done(SSL *s)
846 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
848 p=(unsigned char *)s->init_buf->data;
851 p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0);
853 s->state=SSL3_ST_SW_SRVR_DONE_B;
854 /* number of bytes to write */
855 s->init_num=DTLS1_HM_HEADER_LENGTH;
858 /* buffer the message to handle re-xmits */
859 dtls1_buffer_message(s, 0);
862 /* SSL3_ST_SW_SRVR_DONE_B */
863 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
866 int dtls1_send_server_key_exchange(SSL *s)
868 #ifndef OPENSSL_NO_RSA
872 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
875 #ifndef OPENSSL_NO_DH
878 #ifndef OPENSSL_NO_ECDH
879 EC_KEY *ecdh=NULL, *ecdhp;
880 unsigned char *encodedPoint = NULL;
883 BN_CTX *bn_ctx = NULL;
896 EVP_MD_CTX_init(&md_ctx);
897 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
899 type=s->s3->tmp.new_cipher->algorithm_mkey;
904 r[0]=r[1]=r[2]=r[3]=NULL;
906 #ifndef OPENSSL_NO_RSA
910 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
912 rsa=s->cert->rsa_tmp_cb(s,
913 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
914 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
917 al=SSL_AD_HANDSHAKE_FAILURE;
918 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
926 al=SSL_AD_HANDSHAKE_FAILURE;
927 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
932 s->s3->tmp.use_rsa_tmp=1;
936 #ifndef OPENSSL_NO_DH
940 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
941 dhp=s->cert->dh_tmp_cb(s,
942 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
943 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
946 al=SSL_AD_HANDSHAKE_FAILURE;
947 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
951 if (s->s3->tmp.dh != NULL)
954 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
958 if ((dh=DHparams_dup(dhp)) == NULL)
960 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
965 if ((dhp->pub_key == NULL ||
966 dhp->priv_key == NULL ||
967 (s->options & SSL_OP_SINGLE_DH_USE)))
969 if(!DH_generate_key(dh))
971 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,
978 dh->pub_key=BN_dup(dhp->pub_key);
979 dh->priv_key=BN_dup(dhp->priv_key);
980 if ((dh->pub_key == NULL) ||
981 (dh->priv_key == NULL))
983 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
993 #ifndef OPENSSL_NO_ECDH
994 if (type & SSL_kEECDH)
996 const EC_GROUP *group;
998 ecdhp=cert->ecdh_tmp;
999 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1001 ecdhp=s->cert->ecdh_tmp_cb(s,
1002 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1003 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1007 al=SSL_AD_HANDSHAKE_FAILURE;
1008 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1012 if (s->s3->tmp.ecdh != NULL)
1014 EC_KEY_free(s->s3->tmp.ecdh);
1015 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1019 /* Duplicate the ECDH structure. */
1022 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1025 if (!EC_KEY_up_ref(ecdhp))
1027 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1032 s->s3->tmp.ecdh=ecdh;
1033 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1034 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1035 (s->options & SSL_OP_SINGLE_ECDH_USE))
1037 if(!EC_KEY_generate_key(ecdh))
1039 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1044 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1045 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1046 (EC_KEY_get0_private_key(ecdh) == NULL))
1048 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1052 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1053 (EC_GROUP_get_degree(group) > 163))
1055 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1059 /* XXX: For now, we only support ephemeral ECDH
1060 * keys over named (not generic) curves. For
1061 * supported named curves, curve_id is non-zero.
1064 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1067 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1071 /* Encode the public key.
1072 * First check the size of encoding and
1073 * allocate memory accordingly.
1075 encodedlen = EC_POINT_point2oct(group,
1076 EC_KEY_get0_public_key(ecdh),
1077 POINT_CONVERSION_UNCOMPRESSED,
1080 encodedPoint = (unsigned char *)
1081 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1082 bn_ctx = BN_CTX_new();
1083 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1085 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1090 encodedlen = EC_POINT_point2oct(group,
1091 EC_KEY_get0_public_key(ecdh),
1092 POINT_CONVERSION_UNCOMPRESSED,
1093 encodedPoint, encodedlen, bn_ctx);
1095 if (encodedlen == 0)
1097 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1101 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1103 /* XXX: For now, we only support named (not
1104 * generic) curves in ECDH ephemeral key exchanges.
1105 * In this situation, we need four additional bytes
1106 * to encode the entire ServerECDHParams
1111 /* We'll generate the serverKeyExchange message
1112 * explicitly so we can set these to NULLs
1120 #endif /* !OPENSSL_NO_ECDH */
1121 #ifndef OPENSSL_NO_PSK
1122 if (type & SSL_kPSK)
1124 /* reserve size for record length and PSK identity hint*/
1125 n+=2+strlen(s->ctx->psk_identity_hint);
1128 #endif /* !OPENSSL_NO_PSK */
1130 al=SSL_AD_HANDSHAKE_FAILURE;
1131 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1134 for (i=0; r[i] != NULL; i++)
1136 nr[i]=BN_num_bytes(r[i]);
1140 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1141 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
1143 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1146 al=SSL_AD_DECODE_ERROR;
1149 kn=EVP_PKEY_size(pkey);
1157 if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn))
1159 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1162 d=(unsigned char *)s->init_buf->data;
1163 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1165 for (i=0; r[i] != NULL; i++)
1172 #ifndef OPENSSL_NO_ECDH
1173 if (type & SSL_kEECDH)
1175 /* XXX: For now, we only support named (not generic) curves.
1176 * In this situation, the serverKeyExchange message has:
1177 * [1 byte CurveType], [2 byte CurveName]
1178 * [1 byte length of encoded point], followed by
1179 * the actual encoded point itself
1181 *p = NAMED_CURVE_TYPE;
1189 memcpy((unsigned char*)p,
1190 (unsigned char *)encodedPoint,
1192 OPENSSL_free(encodedPoint);
1197 #ifndef OPENSSL_NO_PSK
1198 if (type & SSL_kPSK)
1200 /* copy PSK identity hint */
1201 s2n(strlen(s->ctx->psk_identity_hint), p);
1202 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1203 p+=strlen(s->ctx->psk_identity_hint);
1210 /* n is the length of the params, they start at
1211 * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space
1213 #ifndef OPENSSL_NO_RSA
1214 if (pkey->type == EVP_PKEY_RSA)
1218 for (num=2; num > 0; num--)
1220 EVP_DigestInit_ex(&md_ctx,(num == 2)
1221 ?s->ctx->md5:s->ctx->sha1, NULL);
1222 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1223 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1224 EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
1225 EVP_DigestFinal_ex(&md_ctx,q,
1226 (unsigned int *)&i);
1230 if (RSA_sign(NID_md5_sha1, md_buf, j,
1231 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1233 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1241 #if !defined(OPENSSL_NO_DSA)
1242 if (pkey->type == EVP_PKEY_DSA)
1245 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1246 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1247 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1248 EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
1249 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1250 (unsigned int *)&i,pkey))
1252 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1260 #if !defined(OPENSSL_NO_ECDSA)
1261 if (pkey->type == EVP_PKEY_EC)
1263 /* let's do ECDSA */
1264 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1265 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1266 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1267 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1268 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1269 (unsigned int *)&i,pkey))
1271 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1280 /* Is this error check actually needed? */
1281 al=SSL_AD_HANDSHAKE_FAILURE;
1282 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1287 d = dtls1_set_message_header(s, d,
1288 SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n);
1290 /* we should now have things packed up, so lets send
1292 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1295 /* buffer the message to handle re-xmits */
1296 dtls1_buffer_message(s, 0);
1299 s->state = SSL3_ST_SW_KEY_EXCH_B;
1300 EVP_MD_CTX_cleanup(&md_ctx);
1301 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1303 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1305 #ifndef OPENSSL_NO_ECDH
1306 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1307 BN_CTX_free(bn_ctx);
1309 EVP_MD_CTX_cleanup(&md_ctx);
1313 int dtls1_send_certificate_request(SSL *s)
1315 unsigned char *p,*d;
1317 STACK_OF(X509_NAME) *sk=NULL;
1320 unsigned int msg_len;
1322 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1326 d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]);
1328 /* get the list of acceptable cert types */
1330 n=ssl3_get_req_cert_type(s,p);
1339 sk=SSL_get_client_CA_list(s);
1343 for (i=0; i<sk_X509_NAME_num(sk); i++)
1345 name=sk_X509_NAME_value(sk,i);
1346 j=i2d_X509_NAME(name,NULL);
1347 if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2))
1349 SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1352 p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]);
1353 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1356 i2d_X509_NAME(name,&p);
1363 i2d_X509_NAME(name,&p);
1364 j-=2; s2n(j,d); j+=2;
1370 /* else no CA names */
1371 p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]);
1374 d=(unsigned char *)buf->data;
1375 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1377 s2n(s->d1->handshake_write_seq,d);
1378 s->d1->handshake_write_seq++;
1380 /* we should now have things packed up, so lets send
1383 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1385 #ifdef NETSCAPE_HANG_BUG
1386 /* XXX: what to do about this? */
1387 p=(unsigned char *)s->init_buf->data + s->init_num;
1390 *(p++)=SSL3_MT_SERVER_DONE;
1397 /* XDTLS: set message header ? */
1398 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1399 dtls1_set_message_header(s, (void *)s->init_buf->data,
1400 SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len);
1402 /* buffer the message to handle re-xmits */
1403 dtls1_buffer_message(s, 0);
1405 s->state = SSL3_ST_SW_CERT_REQ_B;
1408 /* SSL3_ST_SW_CERT_REQ_B */
1409 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1414 int dtls1_send_server_certificate(SSL *s)
1419 if (s->state == SSL3_ST_SW_CERT_A)
1421 x=ssl_get_server_send_cert(s);
1424 /* VRS: allow null cert if auth == KRB5 */
1425 if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) ||
1426 (s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5))
1428 SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
1433 l=dtls1_output_cert_chain(s,x);
1434 s->state=SSL3_ST_SW_CERT_B;
1438 /* buffer the message to handle re-xmits */
1439 dtls1_buffer_message(s, 0);
1442 /* SSL3_ST_SW_CERT_B */
1443 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1446 #ifndef OPENSSL_NO_TLSEXT
1447 int dtls1_send_newsession_ticket(SSL *s)
1449 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
1451 unsigned char *p, *senc, *macstart;
1453 unsigned int hlen, msg_len;
1456 SSL_CTX *tctx = s->initial_ctx;
1457 unsigned char iv[EVP_MAX_IV_LENGTH];
1458 unsigned char key_name[16];
1460 /* get session encoding length */
1461 slen = i2d_SSL_SESSION(s->session, NULL);
1462 /* Some length values are 16 bits, so forget it if session is
1467 /* Grow buffer if need be: the length calculation is as
1468 * follows 12 (DTLS handshake message header) +
1469 * 4 (ticket lifetime hint) + 2 (ticket length) +
1470 * 16 (key name) + max_iv_len (iv length) +
1471 * session_length + max_enc_block_size (max encrypted session
1472 * length) + max_md_size (HMAC).
1474 if (!BUF_MEM_grow(s->init_buf,
1475 DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH +
1476 EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
1478 senc = OPENSSL_malloc(slen);
1482 i2d_SSL_SESSION(s->session, &p);
1484 p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]);
1485 EVP_CIPHER_CTX_init(&ctx);
1486 HMAC_CTX_init(&hctx);
1487 /* Initialize HMAC and cipher contexts. If callback present
1488 * it does all the work otherwise use generated values
1491 if (tctx->tlsext_ticket_key_cb)
1493 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
1502 RAND_pseudo_bytes(iv, 16);
1503 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1504 tctx->tlsext_tick_aes_key, iv);
1505 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1506 tlsext_tick_md(), NULL);
1507 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
1509 l2n(s->session->tlsext_tick_lifetime_hint, p);
1510 /* Skip ticket length for now */
1512 /* Output key name */
1514 memcpy(p, key_name, 16);
1517 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
1518 p += EVP_CIPHER_CTX_iv_length(&ctx);
1519 /* Encrypt session data */
1520 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
1522 EVP_EncryptFinal(&ctx, p, &len);
1524 EVP_CIPHER_CTX_cleanup(&ctx);
1526 HMAC_Update(&hctx, macstart, p - macstart);
1527 HMAC_Final(&hctx, p, &hlen);
1528 HMAC_CTX_cleanup(&hctx);
1531 /* Now write out lengths: p points to end of data written */
1533 len = p - (unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]);
1534 p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4;
1535 s2n(len - 18, p); /* Ticket length */
1537 /* number of bytes to write */
1539 s->state=SSL3_ST_SW_SESSION_TICKET_B;
1543 /* XDTLS: set message header ? */
1544 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1545 dtls1_set_message_header(s, (void *)s->init_buf->data,
1546 SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len);
1548 /* buffer the message to handle re-xmits */
1549 dtls1_buffer_message(s, 0);
1552 /* SSL3_ST_SW_SESSION_TICKET_B */
1553 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));