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authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libssl/d1_srvr.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
openbsd-libressl-v2.1.5.tar.bz2
openbsd-libressl-v2.1.5.zip
This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libssl/d1_srvr.c')
-rw-r--r--src/lib/libssl/d1_srvr.c1357
1 files changed, 0 insertions, 1357 deletions
diff --git a/src/lib/libssl/d1_srvr.c b/src/lib/libssl/d1_srvr.c
deleted file mode 100644
index 4e6d0da3b3..0000000000
--- a/src/lib/libssl/d1_srvr.c
+++ /dev/null
@@ -1,1357 +0,0 @@
1/* $OpenBSD: d1_srvr.c,v 1.49 2015/02/09 10:53:28 jsing Exp $ */
2/*
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5 */
6/* ====================================================================
7 * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
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
19 * distribution.
20 *
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/)"
25 *
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.
30 *
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.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
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 * ====================================================================
53 *
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).
57 *
58 */
59/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
60 * All rights reserved.
61 *
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.
65 *
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).
72 *
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.
79 *
80 * Redistribution and use in source and binary forms, with or without
81 * modification, are permitted provided that the following conditions
82 * are met:
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)"
97 *
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
108 * SUCH DAMAGE.
109 *
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.]
114 */
115
116#include <stdio.h>
117
118#include "ssl_locl.h"
119
120#include <openssl/bn.h>
121#include <openssl/buffer.h>
122#include <openssl/dh.h>
123#include <openssl/evp.h>
124#include <openssl/md5.h>
125#include <openssl/objects.h>
126#include <openssl/x509.h>
127
128static const SSL_METHOD *dtls1_get_server_method(int ver);
129static int dtls1_send_hello_verify_request(SSL *s);
130
131const SSL_METHOD DTLSv1_server_method_data = {
132 .version = DTLS1_VERSION,
133 .ssl_new = dtls1_new,
134 .ssl_clear = dtls1_clear,
135 .ssl_free = dtls1_free,
136 .ssl_accept = dtls1_accept,
137 .ssl_connect = ssl_undefined_function,
138 .ssl_read = ssl3_read,
139 .ssl_peek = ssl3_peek,
140 .ssl_write = ssl3_write,
141 .ssl_shutdown = dtls1_shutdown,
142 .ssl_renegotiate = ssl3_renegotiate,
143 .ssl_renegotiate_check = ssl3_renegotiate_check,
144 .ssl_get_message = dtls1_get_message,
145 .ssl_read_bytes = dtls1_read_bytes,
146 .ssl_write_bytes = dtls1_write_app_data_bytes,
147 .ssl_dispatch_alert = dtls1_dispatch_alert,
148 .ssl_ctrl = dtls1_ctrl,
149 .ssl_ctx_ctrl = ssl3_ctx_ctrl,
150 .get_cipher_by_char = ssl3_get_cipher_by_char,
151 .put_cipher_by_char = ssl3_put_cipher_by_char,
152 .ssl_pending = ssl3_pending,
153 .num_ciphers = ssl3_num_ciphers,
154 .get_cipher = dtls1_get_cipher,
155 .get_ssl_method = dtls1_get_server_method,
156 .get_timeout = dtls1_default_timeout,
157 .ssl3_enc = &DTLSv1_enc_data,
158 .ssl_version = ssl_undefined_void_function,
159 .ssl_callback_ctrl = ssl3_callback_ctrl,
160 .ssl_ctx_callback_ctrl = ssl3_ctx_callback_ctrl,
161};
162
163const SSL_METHOD *
164DTLSv1_server_method(void)
165{
166 return &DTLSv1_server_method_data;
167}
168
169static const SSL_METHOD *
170dtls1_get_server_method(int ver)
171{
172 if (ver == DTLS1_VERSION)
173 return (DTLSv1_server_method());
174 return (NULL);
175}
176
177int
178dtls1_accept(SSL *s)
179{
180 void (*cb)(const SSL *ssl, int type, int val) = NULL;
181 unsigned long alg_k;
182 int ret = -1;
183 int new_state, state, skip = 0;
184 int listen;
185
186 ERR_clear_error();
187 errno = 0;
188
189 if (s->info_callback != NULL)
190 cb = s->info_callback;
191 else if (s->ctx->info_callback != NULL)
192 cb = s->ctx->info_callback;
193
194 listen = s->d1->listen;
195
196 /* init things to blank */
197 s->in_handshake++;
198 if (!SSL_in_init(s) || SSL_in_before(s))
199 SSL_clear(s);
200
201 s->d1->listen = listen;
202
203 if (s->cert == NULL) {
204 SSLerr(SSL_F_DTLS1_ACCEPT, SSL_R_NO_CERTIFICATE_SET);
205 return (-1);
206 }
207
208 for (;;) {
209 state = s->state;
210
211 switch (s->state) {
212 case SSL_ST_RENEGOTIATE:
213 s->renegotiate = 1;
214 /* s->state=SSL_ST_ACCEPT; */
215
216 case SSL_ST_BEFORE:
217 case SSL_ST_ACCEPT:
218 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
219 case SSL_ST_OK|SSL_ST_ACCEPT:
220
221 s->server = 1;
222 if (cb != NULL)
223 cb(s, SSL_CB_HANDSHAKE_START, 1);
224
225 if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) {
226 SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR);
227 return -1;
228 }
229 s->type = SSL_ST_ACCEPT;
230
231 if (s->init_buf == NULL) {
232 BUF_MEM *buf;
233 if ((buf = BUF_MEM_new()) == NULL) {
234 ret = -1;
235 goto end;
236 }
237 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
238 BUF_MEM_free(buf);
239 ret = -1;
240 goto end;
241 }
242 s->init_buf = buf;
243 }
244
245 if (!ssl3_setup_buffers(s)) {
246 ret = -1;
247 goto end;
248 }
249
250 s->init_num = 0;
251
252 if (s->state != SSL_ST_RENEGOTIATE) {
253 /* Ok, we now need to push on a buffering BIO so that
254 * the output is sent in a way that TCP likes :-)
255 * ...but not with SCTP :-)
256 */
257 if (!ssl_init_wbio_buffer(s, 1)) {
258 ret = -1;
259 goto end;
260 }
261
262 if (!ssl3_init_finished_mac(s)) {
263 ret = -1;
264 goto end;
265 }
266
267 s->state = SSL3_ST_SR_CLNT_HELLO_A;
268 s->ctx->stats.sess_accept++;
269 } else {
270 /* s->state == SSL_ST_RENEGOTIATE,
271 * we will just send a HelloRequest */
272 s->ctx->stats.sess_accept_renegotiate++;
273 s->state = SSL3_ST_SW_HELLO_REQ_A;
274 }
275
276 break;
277
278 case SSL3_ST_SW_HELLO_REQ_A:
279 case SSL3_ST_SW_HELLO_REQ_B:
280
281 s->shutdown = 0;
282 dtls1_clear_record_buffer(s);
283 dtls1_start_timer(s);
284 ret = dtls1_send_hello_request(s);
285 if (ret <= 0)
286 goto end;
287 s->s3->tmp.next_state = SSL3_ST_SR_CLNT_HELLO_A;
288 s->state = SSL3_ST_SW_FLUSH;
289 s->init_num = 0;
290
291 if (!ssl3_init_finished_mac(s)) {
292 ret = -1;
293 goto end;
294 }
295 break;
296
297 case SSL3_ST_SW_HELLO_REQ_C:
298 s->state = SSL_ST_OK;
299 break;
300
301 case SSL3_ST_SR_CLNT_HELLO_A:
302 case SSL3_ST_SR_CLNT_HELLO_B:
303 case SSL3_ST_SR_CLNT_HELLO_C:
304
305 s->shutdown = 0;
306 ret = ssl3_get_client_hello(s);
307 if (ret <= 0)
308 goto end;
309 dtls1_stop_timer(s);
310
311 if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
312 s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A;
313 else
314 s->state = SSL3_ST_SW_SRVR_HELLO_A;
315
316 s->init_num = 0;
317
318 /* Reflect ClientHello sequence to remain stateless while listening */
319 if (listen) {
320 memcpy(s->s3->write_sequence, s->s3->read_sequence, sizeof(s->s3->write_sequence));
321 }
322
323 /* If we're just listening, stop here */
324 if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A) {
325 ret = 2;
326 s->d1->listen = 0;
327 /* Set expected sequence numbers
328 * to continue the handshake.
329 */
330 s->d1->handshake_read_seq = 2;
331 s->d1->handshake_write_seq = 1;
332 s->d1->next_handshake_write_seq = 1;
333 goto end;
334 }
335
336 break;
337
338 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
339 case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
340
341 ret = dtls1_send_hello_verify_request(s);
342 if (ret <= 0)
343 goto end;
344 s->state = SSL3_ST_SW_FLUSH;
345 s->s3->tmp.next_state = SSL3_ST_SR_CLNT_HELLO_A;
346
347 /* HelloVerifyRequest resets Finished MAC */
348 if (s->version != DTLS1_BAD_VER) {
349 if (!ssl3_init_finished_mac(s)) {
350 ret = -1;
351 goto end;
352 }
353 }
354 break;
355
356
357 case SSL3_ST_SW_SRVR_HELLO_A:
358 case SSL3_ST_SW_SRVR_HELLO_B:
359 s->renegotiate = 2;
360 dtls1_start_timer(s);
361 ret = dtls1_send_server_hello(s);
362 if (ret <= 0)
363 goto end;
364
365 if (s->hit) {
366 if (s->tlsext_ticket_expected)
367 s->state = SSL3_ST_SW_SESSION_TICKET_A;
368 else
369 s->state = SSL3_ST_SW_CHANGE_A;
370 } else
371 s->state = SSL3_ST_SW_CERT_A;
372 s->init_num = 0;
373 break;
374
375 case SSL3_ST_SW_CERT_A:
376 case SSL3_ST_SW_CERT_B:
377 /* Check if it is anon DH. */
378 if (!(s->s3->tmp.new_cipher->algorithm_auth &
379 SSL_aNULL)) {
380 dtls1_start_timer(s);
381 ret = dtls1_send_server_certificate(s);
382 if (ret <= 0)
383 goto end;
384 if (s->tlsext_status_expected)
385 s->state = SSL3_ST_SW_CERT_STATUS_A;
386 else
387 s->state = SSL3_ST_SW_KEY_EXCH_A;
388 } else {
389 skip = 1;
390 s->state = SSL3_ST_SW_KEY_EXCH_A;
391 }
392 s->init_num = 0;
393 break;
394
395 case SSL3_ST_SW_KEY_EXCH_A:
396 case SSL3_ST_SW_KEY_EXCH_B:
397 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
398
399 /* Only send if using a DH key exchange. */
400 if (alg_k & (SSL_kDHE|SSL_kECDHE)) {
401 dtls1_start_timer(s);
402 ret = dtls1_send_server_key_exchange(s);
403 if (ret <= 0)
404 goto end;
405 } else
406 skip = 1;
407
408 s->state = SSL3_ST_SW_CERT_REQ_A;
409 s->init_num = 0;
410 break;
411
412 case SSL3_ST_SW_CERT_REQ_A:
413 case SSL3_ST_SW_CERT_REQ_B:
414 /*
415 * Determine whether or not we need to request a
416 * certificate.
417 *
418 * Do not request a certificate if:
419 *
420 * - We did not ask for it (SSL_VERIFY_PEER is unset).
421 *
422 * - SSL_VERIFY_CLIENT_ONCE is set and we are
423 * renegotiating.
424 *
425 * - We are using an anonymous ciphersuites
426 * (see section "Certificate request" in SSL 3 drafts
427 * and in RFC 2246) ... except when the application
428 * insists on verification (against the specs, but
429 * s3_clnt.c accepts this for SSL 3).
430 */
431 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
432 ((s->session->peer != NULL) &&
433 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
434 ((s->s3->tmp.new_cipher->algorithm_auth &
435 SSL_aNULL) && !(s->verify_mode &
436 SSL_VERIFY_FAIL_IF_NO_PEER_CERT))) {
437 /* no cert request */
438 skip = 1;
439 s->s3->tmp.cert_request = 0;
440 s->state = SSL3_ST_SW_SRVR_DONE_A;
441 } else {
442 s->s3->tmp.cert_request = 1;
443 dtls1_start_timer(s);
444 ret = dtls1_send_certificate_request(s);
445 if (ret <= 0)
446 goto end;
447 s->state = SSL3_ST_SW_SRVR_DONE_A;
448 s->init_num = 0;
449 }
450 break;
451
452 case SSL3_ST_SW_SRVR_DONE_A:
453 case SSL3_ST_SW_SRVR_DONE_B:
454 dtls1_start_timer(s);
455 ret = dtls1_send_server_done(s);
456 if (ret <= 0)
457 goto end;
458 s->s3->tmp.next_state = SSL3_ST_SR_CERT_A;
459 s->state = SSL3_ST_SW_FLUSH;
460 s->init_num = 0;
461 break;
462
463 case SSL3_ST_SW_FLUSH:
464 s->rwstate = SSL_WRITING;
465 if (BIO_flush(s->wbio) <= 0) {
466 /* If the write error was fatal, stop trying */
467 if (!BIO_should_retry(s->wbio)) {
468 s->rwstate = SSL_NOTHING;
469 s->state = s->s3->tmp.next_state;
470 }
471
472 ret = -1;
473 goto end;
474 }
475 s->rwstate = SSL_NOTHING;
476 s->state = s->s3->tmp.next_state;
477 break;
478
479 case SSL3_ST_SR_CERT_A:
480 case SSL3_ST_SR_CERT_B:
481 /* Check for second client hello (MS SGC) */
482 ret = ssl3_check_client_hello(s);
483 if (ret <= 0)
484 goto end;
485 if (ret == 2) {
486 dtls1_stop_timer(s);
487 s->state = SSL3_ST_SR_CLNT_HELLO_C;
488 } else {
489 /* could be sent for a DH cert, even if we
490 * have not asked for it :-) */
491 ret = ssl3_get_client_certificate(s);
492 if (ret <= 0)
493 goto end;
494 s->init_num = 0;
495 s->state = SSL3_ST_SR_KEY_EXCH_A;
496 }
497 break;
498
499 case SSL3_ST_SR_KEY_EXCH_A:
500 case SSL3_ST_SR_KEY_EXCH_B:
501 ret = ssl3_get_client_key_exchange(s);
502 if (ret <= 0)
503 goto end;
504
505 s->state = SSL3_ST_SR_CERT_VRFY_A;
506 s->init_num = 0;
507
508 if (ret == 2) {
509 /* For the ECDH ciphersuites when
510 * the client sends its ECDH pub key in
511 * a certificate, the CertificateVerify
512 * message is not sent.
513 */
514 s->state = SSL3_ST_SR_FINISHED_A;
515 s->init_num = 0;
516 } else {
517 s->state = SSL3_ST_SR_CERT_VRFY_A;
518 s->init_num = 0;
519
520 /* We need to get hashes here so if there is
521 * a client cert, it can be verified */
522 s->method->ssl3_enc->cert_verify_mac(s,
523 NID_md5, &(s->s3->tmp.cert_verify_md[0]));
524 s->method->ssl3_enc->cert_verify_mac(s,
525 NID_sha1,
526 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
527 }
528 break;
529
530 case SSL3_ST_SR_CERT_VRFY_A:
531 case SSL3_ST_SR_CERT_VRFY_B:
532
533 s->d1->change_cipher_spec_ok = 1;
534 /* we should decide if we expected this one */
535 ret = ssl3_get_cert_verify(s);
536 if (ret <= 0)
537 goto end;
538 s->state = SSL3_ST_SR_FINISHED_A;
539 s->init_num = 0;
540 break;
541
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)
548 goto end;
549 dtls1_stop_timer(s);
550 if (s->hit)
551 s->state = SSL_ST_OK;
552 else if (s->tlsext_ticket_expected)
553 s->state = SSL3_ST_SW_SESSION_TICKET_A;
554 else
555 s->state = SSL3_ST_SW_CHANGE_A;
556 s->init_num = 0;
557 break;
558
559 case SSL3_ST_SW_SESSION_TICKET_A:
560 case SSL3_ST_SW_SESSION_TICKET_B:
561 ret = dtls1_send_newsession_ticket(s);
562 if (ret <= 0)
563 goto end;
564 s->state = SSL3_ST_SW_CHANGE_A;
565 s->init_num = 0;
566 break;
567
568 case SSL3_ST_SW_CERT_STATUS_A:
569 case SSL3_ST_SW_CERT_STATUS_B:
570 ret = ssl3_send_cert_status(s);
571 if (ret <= 0)
572 goto end;
573 s->state = SSL3_ST_SW_KEY_EXCH_A;
574 s->init_num = 0;
575 break;
576
577
578 case SSL3_ST_SW_CHANGE_A:
579 case SSL3_ST_SW_CHANGE_B:
580
581 s->session->cipher = s->s3->tmp.new_cipher;
582 if (!s->method->ssl3_enc->setup_key_block(s)) {
583 ret = -1;
584 goto end;
585 }
586
587 ret = dtls1_send_change_cipher_spec(s,
588 SSL3_ST_SW_CHANGE_A, SSL3_ST_SW_CHANGE_B);
589
590 if (ret <= 0)
591 goto end;
592
593
594 s->state = SSL3_ST_SW_FINISHED_A;
595 s->init_num = 0;
596
597 if (!s->method->ssl3_enc->change_cipher_state(s,
598 SSL3_CHANGE_CIPHER_SERVER_WRITE)) {
599 ret = -1;
600 goto end;
601 }
602
603 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
604 break;
605
606 case SSL3_ST_SW_FINISHED_A:
607 case SSL3_ST_SW_FINISHED_B:
608 ret = dtls1_send_finished(s,
609 SSL3_ST_SW_FINISHED_A, SSL3_ST_SW_FINISHED_B,
610 s->method->ssl3_enc->server_finished_label,
611 s->method->ssl3_enc->server_finished_label_len);
612 if (ret <= 0)
613 goto end;
614 s->state = SSL3_ST_SW_FLUSH;
615 if (s->hit) {
616 s->s3->tmp.next_state = SSL3_ST_SR_FINISHED_A;
617
618 } else {
619 s->s3->tmp.next_state = SSL_ST_OK;
620 }
621 s->init_num = 0;
622 break;
623
624 case SSL_ST_OK:
625 /* clean a few things up */
626 ssl3_cleanup_key_block(s);
627
628 /* remove buffering on output */
629 ssl_free_wbio_buffer(s);
630
631 s->init_num = 0;
632
633 if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
634 {
635 s->renegotiate = 0;
636 s->new_session = 0;
637
638 ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
639
640 s->ctx->stats.sess_accept_good++;
641 /* s->server=1; */
642 s->handshake_func = dtls1_accept;
643
644 if (cb != NULL)
645 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
646 }
647
648 ret = 1;
649
650 /* done handshaking, next message is client hello */
651 s->d1->handshake_read_seq = 0;
652 /* next message is server hello */
653 s->d1->handshake_write_seq = 0;
654 s->d1->next_handshake_write_seq = 0;
655 goto end;
656 /* break; */
657
658 default:
659 SSLerr(SSL_F_DTLS1_ACCEPT, SSL_R_UNKNOWN_STATE);
660 ret = -1;
661 goto end;
662 /* break; */
663 }
664
665 if (!s->s3->tmp.reuse_message && !skip) {
666 if (s->debug) {
667 if ((ret = BIO_flush(s->wbio)) <= 0)
668 goto end;
669 }
670
671 if ((cb != NULL) && (s->state != state)) {
672 new_state = s->state;
673 s->state = state;
674 cb(s, SSL_CB_ACCEPT_LOOP, 1);
675 s->state = new_state;
676 }
677 }
678 skip = 0;
679 }
680end:
681 /* BIO_flush(s->wbio); */
682
683 s->in_handshake--;
684
685 if (cb != NULL)
686 cb(s, SSL_CB_ACCEPT_EXIT, ret);
687 return (ret);
688}
689
690int
691dtls1_send_hello_request(SSL *s)
692{
693 if (s->state == SSL3_ST_SW_HELLO_REQ_A) {
694 ssl3_handshake_msg_start(s, SSL3_MT_HELLO_REQUEST);
695 ssl3_handshake_msg_finish(s, 0);
696
697 s->state = SSL3_ST_SW_HELLO_REQ_B;
698 }
699
700 /* SSL3_ST_SW_HELLO_REQ_B */
701 return (ssl3_handshake_write(s));
702}
703
704int
705dtls1_send_hello_verify_request(SSL *s)
706{
707 unsigned char *d, *p;
708
709 if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) {
710 d = p = ssl3_handshake_msg_start(s,
711 DTLS1_MT_HELLO_VERIFY_REQUEST);
712
713 *(p++) = s->version >> 8;
714 *(p++) = s->version & 0xFF;
715
716 if (s->ctx->app_gen_cookie_cb == NULL ||
717 s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
718 &(s->d1->cookie_len)) == 0) {
719 SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,
720 ERR_R_INTERNAL_ERROR);
721 return 0;
722 }
723
724 *(p++) = (unsigned char) s->d1->cookie_len;
725 memcpy(p, s->d1->cookie, s->d1->cookie_len);
726 p += s->d1->cookie_len;
727
728 ssl3_handshake_msg_finish(s, p - d);
729
730 s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
731 }
732
733 /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
734 return (ssl3_handshake_write(s));
735}
736
737int
738dtls1_send_server_hello(SSL *s)
739{
740 unsigned char *bufend;
741 unsigned char *p, *d;
742 unsigned int sl;
743
744 if (s->state == SSL3_ST_SW_SRVR_HELLO_A) {
745 d = p = ssl3_handshake_msg_start(s, SSL3_MT_SERVER_HELLO);
746
747 *(p++) = s->version >> 8;
748 *(p++) = s->version & 0xff;
749
750 /* Random stuff */
751 arc4random_buf(s->s3->server_random, SSL3_RANDOM_SIZE);
752 memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
753 p += SSL3_RANDOM_SIZE;
754
755 /* now in theory we have 3 options to sending back the
756 * session id. If it is a re-use, we send back the
757 * old session-id, if it is a new session, we send
758 * back the new session-id or we send back a 0 length
759 * session-id if we want it to be single use.
760 * Currently I will not implement the '0' length session-id
761 * 12-Jan-98 - I'll now support the '0' length stuff.
762 */
763 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
764 s->session->session_id_length = 0;
765
766 sl = s->session->session_id_length;
767 if (sl > sizeof s->session->session_id) {
768 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,
769 ERR_R_INTERNAL_ERROR);
770 return -1;
771 }
772 *(p++) = sl;
773 memcpy(p, s->session->session_id, sl);
774 p += sl;
775
776 /* put the cipher */
777 if (s->s3->tmp.new_cipher == NULL)
778 return -1;
779 s2n(ssl3_cipher_get_value(s->s3->tmp.new_cipher), p);
780
781 /* put the compression method */
782 *(p++) = 0;
783
784 bufend = (unsigned char *)s->init_buf->data +
785 SSL3_RT_MAX_PLAIN_LENGTH;
786 if ((p = ssl_add_serverhello_tlsext(s, p, bufend)) == NULL) {
787 SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,
788 ERR_R_INTERNAL_ERROR);
789 return -1;
790 }
791
792 ssl3_handshake_msg_finish(s, p - d);
793
794 s->state = SSL3_ST_SW_SRVR_HELLO_B;
795 }
796
797 /* SSL3_ST_SW_SRVR_HELLO_B */
798 return (ssl3_handshake_write(s));
799}
800
801int
802dtls1_send_server_done(SSL *s)
803{
804 if (s->state == SSL3_ST_SW_SRVR_DONE_A) {
805 ssl3_handshake_msg_start(s, SSL3_MT_SERVER_DONE);
806 ssl3_handshake_msg_finish(s, 0);
807
808 s->state = SSL3_ST_SW_SRVR_DONE_B;
809 }
810
811 /* SSL3_ST_SW_SRVR_DONE_B */
812 return (ssl3_handshake_write(s));
813}
814
815int
816dtls1_send_server_key_exchange(SSL *s)
817{
818 unsigned char *q;
819 int j, num;
820 unsigned char md_buf[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
821 unsigned int u;
822 DH *dh = NULL, *dhp;
823 EC_KEY *ecdh = NULL, *ecdhp;
824 unsigned char *encodedPoint = NULL;
825 int encodedlen = 0;
826 int curve_id = 0;
827 BN_CTX *bn_ctx = NULL;
828
829 EVP_PKEY *pkey;
830 unsigned char *p, *d;
831 int al, i;
832 unsigned long type;
833 int n;
834 CERT *cert;
835 BIGNUM *r[4];
836 int nr[4], kn;
837 BUF_MEM *buf;
838 EVP_MD_CTX md_ctx;
839
840 EVP_MD_CTX_init(&md_ctx);
841 if (s->state == SSL3_ST_SW_KEY_EXCH_A) {
842 type = s->s3->tmp.new_cipher->algorithm_mkey;
843 cert = s->cert;
844
845 buf = s->init_buf;
846
847 r[0] = r[1] = r[2] = r[3] = NULL;
848 n = 0;
849
850 if (type & SSL_kDHE) {
851 dhp = cert->dh_tmp;
852 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
853 dhp = s->cert->dh_tmp_cb(s, 0,
854 SSL_C_PKEYLENGTH(s->s3->tmp.new_cipher));
855 if (dhp == NULL) {
856 al = SSL_AD_HANDSHAKE_FAILURE;
857 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, SSL_R_MISSING_TMP_DH_KEY);
858 goto f_err;
859 }
860
861 if (s->s3->tmp.dh != NULL) {
862 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
863 goto err;
864 }
865
866 if ((dh = DHparams_dup(dhp)) == NULL) {
867 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
868 goto err;
869 }
870
871 s->s3->tmp.dh = dh;
872 if ((dhp->pub_key == NULL || dhp->priv_key == NULL ||
873 (s->options & SSL_OP_SINGLE_DH_USE))) {
874 if (!DH_generate_key(dh)) {
875 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,
876 ERR_R_DH_LIB);
877 goto err;
878 }
879 } else {
880 dh->pub_key = BN_dup(dhp->pub_key);
881 dh->priv_key = BN_dup(dhp->priv_key);
882 if ((dh->pub_key == NULL) ||
883 (dh->priv_key == NULL)) {
884 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_DH_LIB);
885 goto err;
886 }
887 }
888 r[0] = dh->p;
889 r[1] = dh->g;
890 r[2] = dh->pub_key;
891 } else if (type & SSL_kECDHE) {
892 const EC_GROUP *group;
893
894 ecdhp = cert->ecdh_tmp;
895 if (ecdhp == NULL && s->cert->ecdh_tmp_cb != NULL)
896 ecdhp = s->cert->ecdh_tmp_cb(s, 0,
897 SSL_C_PKEYLENGTH(s->s3->tmp.new_cipher));
898 if (ecdhp == NULL) {
899 al = SSL_AD_HANDSHAKE_FAILURE;
900 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, SSL_R_MISSING_TMP_ECDH_KEY);
901 goto f_err;
902 }
903
904 if (s->s3->tmp.ecdh != NULL) {
905 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
906 goto err;
907 }
908
909 /* Duplicate the ECDH structure. */
910 if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) {
911 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
912 goto err;
913 }
914 s->s3->tmp.ecdh = ecdh;
915
916 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
917 (EC_KEY_get0_private_key(ecdh) == NULL) ||
918 (s->options & SSL_OP_SINGLE_ECDH_USE)) {
919 if (!EC_KEY_generate_key(ecdh)) {
920 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
921 goto err;
922 }
923 }
924
925 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
926 (EC_KEY_get0_public_key(ecdh) == NULL) ||
927 (EC_KEY_get0_private_key(ecdh) == NULL)) {
928 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
929 goto err;
930 }
931
932 /* XXX: For now, we only support ephemeral ECDH
933 * keys over named (not generic) curves. For
934 * supported named curves, curve_id is non-zero.
935 */
936 if ((curve_id = tls1_ec_nid2curve_id(
937 EC_GROUP_get_curve_name(group))) == 0) {
938 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
939 goto err;
940 }
941
942 /* Encode the public key.
943 * First check the size of encoding and
944 * allocate memory accordingly.
945 */
946 encodedlen = EC_POINT_point2oct(group,
947 EC_KEY_get0_public_key(ecdh),
948 POINT_CONVERSION_UNCOMPRESSED,
949 NULL, 0, NULL);
950
951 encodedPoint = malloc(encodedlen);
952
953 bn_ctx = BN_CTX_new();
954 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
955 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
956 goto err;
957 }
958
959
960 encodedlen = EC_POINT_point2oct(group,
961 EC_KEY_get0_public_key(ecdh),
962 POINT_CONVERSION_UNCOMPRESSED,
963 encodedPoint, encodedlen, bn_ctx);
964
965 if (encodedlen == 0) {
966 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_ECDH_LIB);
967 goto err;
968 }
969
970 BN_CTX_free(bn_ctx);
971 bn_ctx = NULL;
972
973 /* XXX: For now, we only support named (not
974 * generic) curves in ECDH ephemeral key exchanges.
975 * In this situation, we need four additional bytes
976 * to encode the entire ServerECDHParams
977 * structure.
978 */
979 n = 4 + encodedlen;
980
981 /* We'll generate the serverKeyExchange message
982 * explicitly so we can set these to NULLs
983 */
984 r[0] = NULL;
985 r[1] = NULL;
986 r[2] = NULL;
987 r[3] = NULL;
988 } else {
989 al = SSL_AD_HANDSHAKE_FAILURE;
990 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,
991 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
992 goto f_err;
993 }
994 for (i = 0; r[i] != NULL; i++) {
995 nr[i] = BN_num_bytes(r[i]);
996 n += 2 + nr[i];
997 }
998
999 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) {
1000 if ((pkey = ssl_get_sign_pkey(s,
1001 s->s3->tmp.new_cipher, NULL)) == NULL) {
1002 al = SSL_AD_DECODE_ERROR;
1003 goto f_err;
1004 }
1005 kn = EVP_PKEY_size(pkey);
1006 } else {
1007 pkey = NULL;
1008 kn = 0;
1009 }
1010
1011 if (!BUF_MEM_grow_clean(buf, n + DTLS1_HM_HEADER_LENGTH + kn)) {
1012 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_LIB_BUF);
1013 goto err;
1014 }
1015 d = (unsigned char *)s->init_buf->data;
1016 p = &(d[DTLS1_HM_HEADER_LENGTH]);
1017
1018 for (i = 0; r[i] != NULL; i++) {
1019 s2n(nr[i], p);
1020 BN_bn2bin(r[i], p);
1021 p += nr[i];
1022 }
1023
1024 if (type & SSL_kECDHE) {
1025 /* XXX: For now, we only support named (not generic) curves.
1026 * In this situation, the serverKeyExchange message has:
1027 * [1 byte CurveType], [2 byte CurveName]
1028 * [1 byte length of encoded point], followed by
1029 * the actual encoded point itself
1030 */
1031 *p = NAMED_CURVE_TYPE;
1032 p += 1;
1033 *p = 0;
1034 p += 1;
1035 *p = curve_id;
1036 p += 1;
1037 *p = encodedlen;
1038 p += 1;
1039 memcpy((unsigned char*)p,
1040 (unsigned char *)encodedPoint, encodedlen);
1041 free(encodedPoint);
1042 encodedPoint = NULL;
1043 p += encodedlen;
1044 }
1045
1046
1047 /* not anonymous */
1048 if (pkey != NULL) {
1049 /* n is the length of the params, they start at
1050 * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space
1051 * at the end. */
1052 if (pkey->type == EVP_PKEY_RSA) {
1053 q = md_buf;
1054 j = 0;
1055 for (num = 2; num > 0; num--) {
1056 if (!EVP_DigestInit_ex(&md_ctx, (num == 2)
1057 ? s->ctx->md5 : s->ctx->sha1, NULL))
1058 goto err;
1059 EVP_DigestUpdate(&md_ctx,
1060 &(s->s3->client_random[0]),
1061 SSL3_RANDOM_SIZE);
1062 EVP_DigestUpdate(&md_ctx,
1063 &(s->s3->server_random[0]),
1064 SSL3_RANDOM_SIZE);
1065 EVP_DigestUpdate(&md_ctx,
1066 &(d[DTLS1_HM_HEADER_LENGTH]), n);
1067 EVP_DigestFinal_ex(&md_ctx, q,
1068 (unsigned int *)&i);
1069 q += i;
1070 j += i;
1071 }
1072 if (RSA_sign(NID_md5_sha1, md_buf, j, &(p[2]),
1073 &u, pkey->pkey.rsa) <= 0) {
1074 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_LIB_RSA);
1075 goto err;
1076 }
1077 s2n(u, p);
1078 n += u + 2;
1079 } else
1080 if (pkey->type == EVP_PKEY_DSA) {
1081 /* lets do DSS */
1082 EVP_SignInit_ex(&md_ctx, EVP_dss1(), NULL);
1083 EVP_SignUpdate(&md_ctx, &(s->s3->client_random[0]), SSL3_RANDOM_SIZE);
1084 EVP_SignUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE);
1085 EVP_SignUpdate(&md_ctx, &(d[DTLS1_HM_HEADER_LENGTH]), n);
1086 if (!EVP_SignFinal(&md_ctx, &(p[2]),
1087 (unsigned int *)&i, pkey)) {
1088 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_LIB_DSA);
1089 goto err;
1090 }
1091 s2n(i, p);
1092 n += i + 2;
1093 } else
1094 if (pkey->type == EVP_PKEY_EC) {
1095 /* let's do ECDSA */
1096 EVP_SignInit_ex(&md_ctx, EVP_ecdsa(), NULL);
1097 EVP_SignUpdate(&md_ctx, &(s->s3->client_random[0]), SSL3_RANDOM_SIZE);
1098 EVP_SignUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE);
1099 EVP_SignUpdate(&md_ctx, &(d[DTLS1_HM_HEADER_LENGTH]), n);
1100 if (!EVP_SignFinal(&md_ctx, &(p[2]),
1101 (unsigned int *)&i, pkey)) {
1102 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_LIB_ECDSA);
1103 goto err;
1104 }
1105 s2n(i, p);
1106 n += i + 2;
1107 } else
1108 {
1109 /* Is this error check actually needed? */
1110 al = SSL_AD_HANDSHAKE_FAILURE;
1111 SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, SSL_R_UNKNOWN_PKEY_TYPE);
1112 goto f_err;
1113 }
1114 }
1115
1116 d = dtls1_set_message_header(s, d,
1117 SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n);
1118
1119 /* we should now have things packed up, so lets send
1120 * it off */
1121 s->init_num = n + DTLS1_HM_HEADER_LENGTH;
1122 s->init_off = 0;
1123
1124 /* buffer the message to handle re-xmits */
1125 dtls1_buffer_message(s, 0);
1126 }
1127
1128 s->state = SSL3_ST_SW_KEY_EXCH_B;
1129 EVP_MD_CTX_cleanup(&md_ctx);
1130 return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
1131f_err:
1132 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1133err:
1134 free(encodedPoint);
1135 BN_CTX_free(bn_ctx);
1136 EVP_MD_CTX_cleanup(&md_ctx);
1137 return (-1);
1138}
1139
1140int
1141dtls1_send_certificate_request(SSL *s)
1142{
1143 unsigned char *p, *d;
1144 int i, j, nl, off, n;
1145 STACK_OF(X509_NAME) *sk = NULL;
1146 X509_NAME *name;
1147 BUF_MEM *buf;
1148 unsigned int msg_len;
1149
1150 if (s->state == SSL3_ST_SW_CERT_REQ_A) {
1151 buf = s->init_buf;
1152
1153 d = p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]);
1154
1155 /* get the list of acceptable cert types */
1156 p++;
1157 n = ssl3_get_req_cert_type(s, p);
1158 d[0] = n;
1159 p += n;
1160 n++;
1161
1162 off = n;
1163 p += 2;
1164 n += 2;
1165
1166 sk = SSL_get_client_CA_list(s);
1167 nl = 0;
1168 if (sk != NULL) {
1169 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1170 name = sk_X509_NAME_value(sk, i);
1171 j = i2d_X509_NAME(name, NULL);
1172 if (!BUF_MEM_grow_clean(buf, DTLS1_HM_HEADER_LENGTH + n + j + 2)) {
1173 SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST, ERR_R_BUF_LIB);
1174 goto err;
1175 }
1176 p = (unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH + n]);
1177 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) {
1178 s2n(j, p);
1179 i2d_X509_NAME(name, &p);
1180 n += 2 + j;
1181 nl += 2 + j;
1182 } else {
1183 d = p;
1184 i2d_X509_NAME(name, &p);
1185 j -= 2;
1186 s2n(j, d);
1187 j += 2;
1188 n += j;
1189 nl += j;
1190 }
1191 }
1192 }
1193 /* else no CA names */
1194 p = (unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH + off]);
1195 s2n(nl, p);
1196
1197 d = (unsigned char *)buf->data;
1198 *(d++) = SSL3_MT_CERTIFICATE_REQUEST;
1199 l2n3(n, d);
1200 s2n(s->d1->handshake_write_seq, d);
1201 s->d1->handshake_write_seq++;
1202
1203 /* we should now have things packed up, so lets send
1204 * it off */
1205
1206 s->init_num = n + DTLS1_HM_HEADER_LENGTH;
1207 s->init_off = 0;
1208
1209 /* XDTLS: set message header ? */
1210 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1211 dtls1_set_message_header(s, (void *)s->init_buf->data,
1212 SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len);
1213
1214 /* buffer the message to handle re-xmits */
1215 dtls1_buffer_message(s, 0);
1216
1217 s->state = SSL3_ST_SW_CERT_REQ_B;
1218 }
1219
1220 /* SSL3_ST_SW_CERT_REQ_B */
1221 return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
1222err:
1223 return (-1);
1224}
1225
1226int
1227dtls1_send_server_certificate(SSL *s)
1228{
1229 unsigned long l;
1230 X509 *x;
1231
1232 if (s->state == SSL3_ST_SW_CERT_A) {
1233 x = ssl_get_server_send_cert(s);
1234 if (x == NULL) {
1235 SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,
1236 ERR_R_INTERNAL_ERROR);
1237 return (0);
1238 }
1239
1240 l = dtls1_output_cert_chain(s, x);
1241 s->state = SSL3_ST_SW_CERT_B;
1242 s->init_num = (int)l;
1243 s->init_off = 0;
1244
1245 /* buffer the message to handle re-xmits */
1246 dtls1_buffer_message(s, 0);
1247 }
1248
1249 /* SSL3_ST_SW_CERT_B */
1250 return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
1251}
1252
1253int
1254dtls1_send_newsession_ticket(SSL *s)
1255{
1256 if (s->state == SSL3_ST_SW_SESSION_TICKET_A) {
1257 unsigned char *p, *senc, *macstart;
1258 int len, slen;
1259 unsigned int hlen, msg_len;
1260 EVP_CIPHER_CTX ctx;
1261 HMAC_CTX hctx;
1262 SSL_CTX *tctx = s->initial_ctx;
1263 unsigned char iv[EVP_MAX_IV_LENGTH];
1264 unsigned char key_name[16];
1265
1266 /* get session encoding length */
1267 slen = i2d_SSL_SESSION(s->session, NULL);
1268 /* Some length values are 16 bits, so forget it if session is
1269 * too long
1270 */
1271 if (slen > 0xFF00)
1272 return -1;
1273 /* Grow buffer if need be: the length calculation is as
1274 * follows 12 (DTLS handshake message header) +
1275 * 4 (ticket lifetime hint) + 2 (ticket length) +
1276 * 16 (key name) + max_iv_len (iv length) +
1277 * session_length + max_enc_block_size (max encrypted session
1278 * length) + max_md_size (HMAC).
1279 */
1280 if (!BUF_MEM_grow(s->init_buf,
1281 DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH +
1282 EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
1283 return -1;
1284 senc = malloc(slen);
1285 if (!senc)
1286 return -1;
1287 p = senc;
1288 i2d_SSL_SESSION(s->session, &p);
1289
1290 p = (unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]);
1291 EVP_CIPHER_CTX_init(&ctx);
1292 HMAC_CTX_init(&hctx);
1293 /* Initialize HMAC and cipher contexts. If callback present
1294 * it does all the work otherwise use generated values
1295 * from parent ctx.
1296 */
1297 if (tctx->tlsext_ticket_key_cb) {
1298 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
1299 &hctx, 1) < 0) {
1300 free(senc);
1301 return -1;
1302 }
1303 } else {
1304 arc4random_buf(iv, 16);
1305 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1306 tctx->tlsext_tick_aes_key, iv);
1307 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1308 tlsext_tick_md(), NULL);
1309 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
1310 }
1311 l2n(s->session->tlsext_tick_lifetime_hint, p);
1312 /* Skip ticket length for now */
1313 p += 2;
1314 /* Output key name */
1315 macstart = p;
1316 memcpy(p, key_name, 16);
1317 p += 16;
1318 /* output IV */
1319 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
1320 p += EVP_CIPHER_CTX_iv_length(&ctx);
1321 /* Encrypt session data */
1322 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
1323 p += len;
1324 EVP_EncryptFinal(&ctx, p, &len);
1325 p += len;
1326 EVP_CIPHER_CTX_cleanup(&ctx);
1327
1328 HMAC_Update(&hctx, macstart, p - macstart);
1329 HMAC_Final(&hctx, p, &hlen);
1330 HMAC_CTX_cleanup(&hctx);
1331
1332 p += hlen;
1333 /* Now write out lengths: p points to end of data written */
1334 /* Total length */
1335 len = p - (unsigned char *)(s->init_buf->data);
1336 /* Ticket length */
1337 p = (unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4;
1338 s2n(len - DTLS1_HM_HEADER_LENGTH - 6, p);
1339
1340 /* number of bytes to write */
1341 s->init_num = len;
1342 s->state = SSL3_ST_SW_SESSION_TICKET_B;
1343 s->init_off = 0;
1344 free(senc);
1345
1346 /* XDTLS: set message header ? */
1347 msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
1348 dtls1_set_message_header(s, (void *)s->init_buf->data,
1349 SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len);
1350
1351 /* buffer the message to handle re-xmits */
1352 dtls1_buffer_message(s, 0);
1353 }
1354
1355 /* SSL3_ST_SW_SESSION_TICKET_B */
1356 return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
1357}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 06:24:58 +0000