Line data Source code
1 : /* ssl/d1_clnt.c */
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 : #include "ssl_locl.h"
118 : #ifndef OPENSSL_NO_KRB5
119 : # include "kssl_lcl.h"
120 : #endif
121 : #include <openssl/buffer.h>
122 : #include <openssl/rand.h>
123 : #include <openssl/objects.h>
124 : #include <openssl/evp.h>
125 : #include <openssl/md5.h>
126 : #include <openssl/bn.h>
127 : #ifndef OPENSSL_NO_DH
128 : # include <openssl/dh.h>
129 : #endif
130 :
131 : static const SSL_METHOD *dtls1_get_client_method(int ver);
132 : static int dtls1_get_hello_verify(SSL *s);
133 :
134 0 : static const SSL_METHOD *dtls1_get_client_method(int ver)
135 : {
136 0 : if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
137 : return (DTLSv1_client_method());
138 0 : else if (ver == DTLS1_2_VERSION)
139 : return (DTLSv1_2_client_method());
140 : else
141 0 : return (NULL);
142 : }
143 :
144 0 : IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
145 : DTLSv1_client_method,
146 : ssl_undefined_function,
147 : dtls1_connect,
148 : dtls1_get_client_method, DTLSv1_enc_data)
149 :
150 0 : IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
151 : DTLSv1_2_client_method,
152 : ssl_undefined_function,
153 : dtls1_connect,
154 : dtls1_get_client_method, DTLSv1_2_enc_data)
155 :
156 0 : IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
157 : DTLS_client_method,
158 : ssl_undefined_function,
159 : dtls1_connect,
160 : dtls1_get_client_method, DTLSv1_2_enc_data)
161 :
162 0 : int dtls1_connect(SSL *s)
163 : {
164 : BUF_MEM *buf = NULL;
165 0 : unsigned long Time = (unsigned long)time(NULL);
166 : void (*cb) (const SSL *ssl, int type, int val) = NULL;
167 : int ret = -1;
168 : int new_state, state, skip = 0;
169 : #ifndef OPENSSL_NO_SCTP
170 : unsigned char sctpauthkey[64];
171 : char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
172 : #endif
173 :
174 0 : RAND_add(&Time, sizeof(Time), 0);
175 0 : ERR_clear_error();
176 0 : clear_sys_error();
177 :
178 0 : if (s->info_callback != NULL)
179 : cb = s->info_callback;
180 0 : else if (s->ctx->info_callback != NULL)
181 : cb = s->ctx->info_callback;
182 :
183 0 : s->in_handshake++;
184 0 : if (!SSL_in_init(s) || SSL_in_before(s))
185 0 : SSL_clear(s);
186 :
187 : #ifndef OPENSSL_NO_SCTP
188 : /*
189 : * Notify SCTP BIO socket to enter handshake mode and prevent stream
190 : * identifier other than 0. Will be ignored if no SCTP is used.
191 : */
192 : BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
193 : s->in_handshake, NULL);
194 : #endif
195 :
196 : #ifndef OPENSSL_NO_HEARTBEATS
197 : /*
198 : * If we're awaiting a HeartbeatResponse, pretend we already got and
199 : * don't await it anymore, because Heartbeats don't make sense during
200 : * handshakes anyway.
201 : */
202 0 : if (s->tlsext_hb_pending) {
203 0 : dtls1_stop_timer(s);
204 0 : s->tlsext_hb_pending = 0;
205 0 : s->tlsext_hb_seq++;
206 : }
207 : #endif
208 :
209 : for (;;) {
210 0 : state = s->state;
211 :
212 0 : switch (s->state) {
213 : case SSL_ST_RENEGOTIATE:
214 0 : s->renegotiate = 1;
215 0 : s->state = SSL_ST_CONNECT;
216 0 : s->ctx->stats.sess_connect_renegotiate++;
217 : /* break */
218 : case SSL_ST_BEFORE:
219 : case SSL_ST_CONNECT:
220 : case SSL_ST_BEFORE | SSL_ST_CONNECT:
221 : case SSL_ST_OK | SSL_ST_CONNECT:
222 :
223 0 : s->server = 0;
224 0 : if (cb != NULL)
225 0 : cb(s, SSL_CB_HANDSHAKE_START, 1);
226 :
227 0 : if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
228 : (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00)) {
229 0 : SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
230 : ret = -1;
231 0 : s->state = SSL_ST_ERR;
232 0 : goto end;
233 : }
234 :
235 : /* s->version=SSL3_VERSION; */
236 0 : s->type = SSL_ST_CONNECT;
237 :
238 0 : if (s->init_buf == NULL) {
239 0 : if ((buf = BUF_MEM_new()) == NULL) {
240 : ret = -1;
241 0 : s->state = SSL_ST_ERR;
242 0 : goto end;
243 : }
244 0 : if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
245 : ret = -1;
246 0 : s->state = SSL_ST_ERR;
247 0 : goto end;
248 : }
249 0 : s->init_buf = buf;
250 : buf = NULL;
251 : }
252 :
253 0 : if (!ssl3_setup_buffers(s)) {
254 : ret = -1;
255 0 : s->state = SSL_ST_ERR;
256 0 : goto end;
257 : }
258 :
259 : /* setup buffing BIO */
260 0 : if (!ssl_init_wbio_buffer(s, 0)) {
261 : ret = -1;
262 0 : s->state = SSL_ST_ERR;
263 0 : goto end;
264 : }
265 :
266 : /* don't push the buffering BIO quite yet */
267 :
268 0 : s->state = SSL3_ST_CW_CLNT_HELLO_A;
269 0 : s->ctx->stats.sess_connect++;
270 0 : s->init_num = 0;
271 : /* mark client_random uninitialized */
272 0 : memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
273 0 : s->d1->send_cookie = 0;
274 0 : s->hit = 0;
275 0 : s->d1->change_cipher_spec_ok = 0;
276 : /*
277 : * Should have been reset by ssl3_get_finished, too.
278 : */
279 0 : s->s3->change_cipher_spec = 0;
280 0 : break;
281 :
282 : #ifndef OPENSSL_NO_SCTP
283 : case DTLS1_SCTP_ST_CR_READ_SOCK:
284 :
285 : if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
286 : s->s3->in_read_app_data = 2;
287 : s->rwstate = SSL_READING;
288 : BIO_clear_retry_flags(SSL_get_rbio(s));
289 : BIO_set_retry_read(SSL_get_rbio(s));
290 : ret = -1;
291 : goto end;
292 : }
293 :
294 : s->state = s->s3->tmp.next_state;
295 : break;
296 :
297 : case DTLS1_SCTP_ST_CW_WRITE_SOCK:
298 : /* read app data until dry event */
299 :
300 : ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
301 : if (ret < 0)
302 : goto end;
303 :
304 : if (ret == 0) {
305 : s->s3->in_read_app_data = 2;
306 : s->rwstate = SSL_READING;
307 : BIO_clear_retry_flags(SSL_get_rbio(s));
308 : BIO_set_retry_read(SSL_get_rbio(s));
309 : ret = -1;
310 : goto end;
311 : }
312 :
313 : s->state = s->d1->next_state;
314 : break;
315 : #endif
316 :
317 : case SSL3_ST_CW_CLNT_HELLO_A:
318 : case SSL3_ST_CW_CLNT_HELLO_B:
319 :
320 0 : s->shutdown = 0;
321 :
322 : /* every DTLS ClientHello resets Finished MAC */
323 0 : ssl3_init_finished_mac(s);
324 :
325 0 : dtls1_start_timer(s);
326 0 : ret = ssl3_client_hello(s);
327 0 : if (ret <= 0)
328 : goto end;
329 :
330 0 : if (s->d1->send_cookie) {
331 0 : s->state = SSL3_ST_CW_FLUSH;
332 0 : s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
333 : } else
334 0 : s->state = SSL3_ST_CR_SRVR_HELLO_A;
335 :
336 0 : s->init_num = 0;
337 :
338 : #ifndef OPENSSL_NO_SCTP
339 : /* Disable buffering for SCTP */
340 : if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
341 : #endif
342 : /*
343 : * turn on buffering for the next lot of output
344 : */
345 0 : if (s->bbio != s->wbio)
346 0 : s->wbio = BIO_push(s->bbio, s->wbio);
347 : #ifndef OPENSSL_NO_SCTP
348 : }
349 : #endif
350 :
351 : break;
352 :
353 : case SSL3_ST_CR_SRVR_HELLO_A:
354 : case SSL3_ST_CR_SRVR_HELLO_B:
355 0 : ret = ssl3_get_server_hello(s);
356 0 : if (ret <= 0)
357 : goto end;
358 : else {
359 0 : if (s->hit) {
360 : #ifndef OPENSSL_NO_SCTP
361 : /*
362 : * Add new shared key for SCTP-Auth, will be ignored if
363 : * no SCTP used.
364 : */
365 : snprintf((char *)labelbuffer,
366 : sizeof(DTLS1_SCTP_AUTH_LABEL),
367 : DTLS1_SCTP_AUTH_LABEL);
368 :
369 : SSL_export_keying_material(s, sctpauthkey,
370 : sizeof(sctpauthkey),
371 : labelbuffer,
372 : sizeof(labelbuffer), NULL, 0,
373 : 0);
374 :
375 : BIO_ctrl(SSL_get_wbio(s),
376 : BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
377 : sizeof(sctpauthkey), sctpauthkey);
378 : #endif
379 :
380 0 : s->state = SSL3_ST_CR_FINISHED_A;
381 : } else
382 0 : s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
383 : }
384 0 : s->init_num = 0;
385 0 : break;
386 :
387 : case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
388 : case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
389 :
390 0 : ret = dtls1_get_hello_verify(s);
391 0 : if (ret <= 0)
392 : goto end;
393 0 : dtls1_stop_timer(s);
394 0 : if (s->d1->send_cookie) /* start again, with a cookie */
395 0 : s->state = SSL3_ST_CW_CLNT_HELLO_A;
396 : else
397 0 : s->state = SSL3_ST_CR_CERT_A;
398 0 : s->init_num = 0;
399 0 : break;
400 :
401 : case SSL3_ST_CR_CERT_A:
402 : case SSL3_ST_CR_CERT_B:
403 : /* Check if it is anon DH or PSK */
404 0 : if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
405 0 : !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
406 0 : ret = ssl3_get_server_certificate(s);
407 0 : if (ret <= 0)
408 : goto end;
409 : #ifndef OPENSSL_NO_TLSEXT
410 0 : if (s->tlsext_status_expected)
411 0 : s->state = SSL3_ST_CR_CERT_STATUS_A;
412 : else
413 0 : s->state = SSL3_ST_CR_KEY_EXCH_A;
414 : } else {
415 : skip = 1;
416 0 : s->state = SSL3_ST_CR_KEY_EXCH_A;
417 : }
418 : #else
419 : } else
420 : skip = 1;
421 :
422 : s->state = SSL3_ST_CR_KEY_EXCH_A;
423 : #endif
424 0 : s->init_num = 0;
425 0 : break;
426 :
427 : case SSL3_ST_CR_KEY_EXCH_A:
428 : case SSL3_ST_CR_KEY_EXCH_B:
429 0 : ret = ssl3_get_key_exchange(s);
430 0 : if (ret <= 0)
431 : goto end;
432 0 : s->state = SSL3_ST_CR_CERT_REQ_A;
433 0 : s->init_num = 0;
434 :
435 : /*
436 : * at this point we check that we have the required stuff from
437 : * the server
438 : */
439 0 : if (!ssl3_check_cert_and_algorithm(s)) {
440 : ret = -1;
441 0 : s->state = SSL_ST_ERR;
442 0 : goto end;
443 : }
444 : break;
445 :
446 : case SSL3_ST_CR_CERT_REQ_A:
447 : case SSL3_ST_CR_CERT_REQ_B:
448 0 : ret = ssl3_get_certificate_request(s);
449 0 : if (ret <= 0)
450 : goto end;
451 0 : s->state = SSL3_ST_CR_SRVR_DONE_A;
452 0 : s->init_num = 0;
453 0 : break;
454 :
455 : case SSL3_ST_CR_SRVR_DONE_A:
456 : case SSL3_ST_CR_SRVR_DONE_B:
457 0 : ret = ssl3_get_server_done(s);
458 0 : if (ret <= 0)
459 : goto end;
460 0 : dtls1_stop_timer(s);
461 0 : if (s->s3->tmp.cert_req)
462 0 : s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
463 : else
464 0 : s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
465 0 : s->init_num = 0;
466 :
467 : #ifndef OPENSSL_NO_SCTP
468 : if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
469 : state == SSL_ST_RENEGOTIATE)
470 : s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
471 : else
472 : #endif
473 0 : s->state = s->s3->tmp.next_state;
474 0 : break;
475 :
476 : case SSL3_ST_CW_CERT_A:
477 : case SSL3_ST_CW_CERT_B:
478 : case SSL3_ST_CW_CERT_C:
479 : case SSL3_ST_CW_CERT_D:
480 0 : dtls1_start_timer(s);
481 0 : ret = ssl3_send_client_certificate(s);
482 0 : if (ret <= 0)
483 : goto end;
484 0 : s->state = SSL3_ST_CW_KEY_EXCH_A;
485 0 : s->init_num = 0;
486 0 : break;
487 :
488 : case SSL3_ST_CW_KEY_EXCH_A:
489 : case SSL3_ST_CW_KEY_EXCH_B:
490 0 : dtls1_start_timer(s);
491 0 : ret = ssl3_send_client_key_exchange(s);
492 0 : if (ret <= 0)
493 : goto end;
494 :
495 : #ifndef OPENSSL_NO_SCTP
496 : /*
497 : * Add new shared key for SCTP-Auth, will be ignored if no SCTP
498 : * used.
499 : */
500 : snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
501 : DTLS1_SCTP_AUTH_LABEL);
502 :
503 : SSL_export_keying_material(s, sctpauthkey,
504 : sizeof(sctpauthkey), labelbuffer,
505 : sizeof(labelbuffer), NULL, 0, 0);
506 :
507 : BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
508 : sizeof(sctpauthkey), sctpauthkey);
509 : #endif
510 :
511 : /*
512 : * EAY EAY EAY need to check for DH fix cert sent back
513 : */
514 : /*
515 : * For TLS, cert_req is set to 2, so a cert chain of nothing is
516 : * sent, but no verify packet is sent
517 : */
518 0 : if (s->s3->tmp.cert_req == 1) {
519 0 : s->state = SSL3_ST_CW_CERT_VRFY_A;
520 : } else {
521 : #ifndef OPENSSL_NO_SCTP
522 : if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
523 : s->d1->next_state = SSL3_ST_CW_CHANGE_A;
524 : s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
525 : } else
526 : #endif
527 0 : s->state = SSL3_ST_CW_CHANGE_A;
528 : }
529 :
530 0 : s->init_num = 0;
531 0 : break;
532 :
533 : case SSL3_ST_CW_CERT_VRFY_A:
534 : case SSL3_ST_CW_CERT_VRFY_B:
535 0 : dtls1_start_timer(s);
536 0 : ret = ssl3_send_client_verify(s);
537 0 : if (ret <= 0)
538 : goto end;
539 : #ifndef OPENSSL_NO_SCTP
540 : if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
541 : s->d1->next_state = SSL3_ST_CW_CHANGE_A;
542 : s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
543 : } else
544 : #endif
545 0 : s->state = SSL3_ST_CW_CHANGE_A;
546 0 : s->init_num = 0;
547 0 : break;
548 :
549 : case SSL3_ST_CW_CHANGE_A:
550 : case SSL3_ST_CW_CHANGE_B:
551 0 : if (!s->hit)
552 0 : dtls1_start_timer(s);
553 0 : ret = dtls1_send_change_cipher_spec(s,
554 : SSL3_ST_CW_CHANGE_A,
555 : SSL3_ST_CW_CHANGE_B);
556 0 : if (ret <= 0)
557 : goto end;
558 :
559 0 : s->state = SSL3_ST_CW_FINISHED_A;
560 0 : s->init_num = 0;
561 :
562 0 : s->session->cipher = s->s3->tmp.new_cipher;
563 : #ifdef OPENSSL_NO_COMP
564 : s->session->compress_meth = 0;
565 : #else
566 0 : if (s->s3->tmp.new_compression == NULL)
567 0 : s->session->compress_meth = 0;
568 : else
569 0 : s->session->compress_meth = s->s3->tmp.new_compression->id;
570 : #endif
571 0 : if (!s->method->ssl3_enc->setup_key_block(s)) {
572 : ret = -1;
573 0 : s->state = SSL_ST_ERR;
574 0 : goto end;
575 : }
576 :
577 0 : if (!s->method->ssl3_enc->change_cipher_state(s,
578 : SSL3_CHANGE_CIPHER_CLIENT_WRITE))
579 : {
580 : ret = -1;
581 0 : s->state = SSL_ST_ERR;
582 0 : goto end;
583 : }
584 : #ifndef OPENSSL_NO_SCTP
585 : if (s->hit) {
586 : /*
587 : * Change to new shared key of SCTP-Auth, will be ignored if
588 : * no SCTP used.
589 : */
590 : BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
591 : 0, NULL);
592 : }
593 : #endif
594 :
595 0 : dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
596 0 : break;
597 :
598 : case SSL3_ST_CW_FINISHED_A:
599 : case SSL3_ST_CW_FINISHED_B:
600 0 : if (!s->hit)
601 0 : dtls1_start_timer(s);
602 0 : ret = ssl3_send_finished(s,
603 : SSL3_ST_CW_FINISHED_A,
604 : SSL3_ST_CW_FINISHED_B,
605 : s->method->
606 : ssl3_enc->client_finished_label,
607 0 : s->method->
608 : ssl3_enc->client_finished_label_len);
609 0 : if (ret <= 0)
610 : goto end;
611 0 : s->state = SSL3_ST_CW_FLUSH;
612 :
613 : /* clear flags */
614 0 : s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
615 0 : if (s->hit) {
616 0 : s->s3->tmp.next_state = SSL_ST_OK;
617 : #ifndef OPENSSL_NO_SCTP
618 : if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
619 : s->d1->next_state = s->s3->tmp.next_state;
620 : s->s3->tmp.next_state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
621 : }
622 : #endif
623 0 : if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
624 0 : s->state = SSL_ST_OK;
625 : #ifndef OPENSSL_NO_SCTP
626 : if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
627 : s->d1->next_state = SSL_ST_OK;
628 : s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
629 : }
630 : #endif
631 0 : s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
632 0 : s->s3->delay_buf_pop_ret = 0;
633 : }
634 : } else {
635 : #ifndef OPENSSL_NO_SCTP
636 : /*
637 : * Change to new shared key of SCTP-Auth, will be ignored if
638 : * no SCTP used.
639 : */
640 : BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
641 : 0, NULL);
642 : #endif
643 :
644 : #ifndef OPENSSL_NO_TLSEXT
645 : /*
646 : * Allow NewSessionTicket if ticket expected
647 : */
648 0 : if (s->tlsext_ticket_expected)
649 0 : s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
650 : else
651 : #endif
652 :
653 0 : s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
654 : }
655 0 : s->init_num = 0;
656 0 : break;
657 :
658 : #ifndef OPENSSL_NO_TLSEXT
659 : case SSL3_ST_CR_SESSION_TICKET_A:
660 : case SSL3_ST_CR_SESSION_TICKET_B:
661 0 : ret = ssl3_get_new_session_ticket(s);
662 0 : if (ret <= 0)
663 : goto end;
664 0 : s->state = SSL3_ST_CR_FINISHED_A;
665 0 : s->init_num = 0;
666 0 : break;
667 :
668 : case SSL3_ST_CR_CERT_STATUS_A:
669 : case SSL3_ST_CR_CERT_STATUS_B:
670 0 : ret = ssl3_get_cert_status(s);
671 0 : if (ret <= 0)
672 : goto end;
673 0 : s->state = SSL3_ST_CR_KEY_EXCH_A;
674 0 : s->init_num = 0;
675 0 : break;
676 : #endif
677 :
678 : case SSL3_ST_CR_FINISHED_A:
679 : case SSL3_ST_CR_FINISHED_B:
680 0 : s->d1->change_cipher_spec_ok = 1;
681 0 : ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
682 : SSL3_ST_CR_FINISHED_B);
683 0 : if (ret <= 0)
684 : goto end;
685 0 : dtls1_stop_timer(s);
686 :
687 0 : if (s->hit)
688 0 : s->state = SSL3_ST_CW_CHANGE_A;
689 : else
690 0 : s->state = SSL_ST_OK;
691 :
692 : #ifndef OPENSSL_NO_SCTP
693 : if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
694 : state == SSL_ST_RENEGOTIATE) {
695 : s->d1->next_state = s->state;
696 : s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
697 : }
698 : #endif
699 :
700 0 : s->init_num = 0;
701 0 : break;
702 :
703 : case SSL3_ST_CW_FLUSH:
704 0 : s->rwstate = SSL_WRITING;
705 0 : if (BIO_flush(s->wbio) <= 0) {
706 : /*
707 : * If the write error was fatal, stop trying
708 : */
709 0 : if (!BIO_should_retry(s->wbio)) {
710 0 : s->rwstate = SSL_NOTHING;
711 0 : s->state = s->s3->tmp.next_state;
712 : }
713 :
714 : ret = -1;
715 : goto end;
716 : }
717 0 : s->rwstate = SSL_NOTHING;
718 0 : s->state = s->s3->tmp.next_state;
719 0 : break;
720 :
721 : case SSL_ST_OK:
722 : /* clean a few things up */
723 0 : ssl3_cleanup_key_block(s);
724 :
725 : #if 0
726 : if (s->init_buf != NULL) {
727 : BUF_MEM_free(s->init_buf);
728 : s->init_buf = NULL;
729 : }
730 : #endif
731 :
732 : /*
733 : * If we are not 'joining' the last two packets, remove the
734 : * buffering now
735 : */
736 0 : if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
737 0 : ssl_free_wbio_buffer(s);
738 : /* else do it later in ssl3_write */
739 :
740 0 : s->init_num = 0;
741 0 : s->renegotiate = 0;
742 0 : s->new_session = 0;
743 :
744 0 : ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
745 0 : if (s->hit)
746 0 : s->ctx->stats.sess_hit++;
747 :
748 : ret = 1;
749 : /* s->server=0; */
750 0 : s->handshake_func = dtls1_connect;
751 0 : s->ctx->stats.sess_connect_good++;
752 :
753 0 : if (cb != NULL)
754 0 : cb(s, SSL_CB_HANDSHAKE_DONE, 1);
755 :
756 : /* done with handshaking */
757 0 : s->d1->handshake_read_seq = 0;
758 0 : s->d1->next_handshake_write_seq = 0;
759 0 : goto end;
760 : /* break; */
761 :
762 : case SSL_ST_ERR:
763 : default:
764 0 : SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE);
765 : ret = -1;
766 0 : goto end;
767 : /* break; */
768 : }
769 :
770 : /* did we do anything */
771 0 : if (!s->s3->tmp.reuse_message && !skip) {
772 0 : if (s->debug) {
773 0 : if ((ret = BIO_flush(s->wbio)) <= 0)
774 : goto end;
775 : }
776 :
777 0 : if ((cb != NULL) && (s->state != state)) {
778 : new_state = s->state;
779 0 : s->state = state;
780 0 : cb(s, SSL_CB_CONNECT_LOOP, 1);
781 0 : s->state = new_state;
782 : }
783 : }
784 : skip = 0;
785 : }
786 : end:
787 0 : s->in_handshake--;
788 :
789 : #ifndef OPENSSL_NO_SCTP
790 : /*
791 : * Notify SCTP BIO socket to leave handshake mode and allow stream
792 : * identifier other than 0. Will be ignored if no SCTP is used.
793 : */
794 : BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
795 : s->in_handshake, NULL);
796 : #endif
797 :
798 0 : if (buf != NULL)
799 0 : BUF_MEM_free(buf);
800 0 : if (cb != NULL)
801 0 : cb(s, SSL_CB_CONNECT_EXIT, ret);
802 0 : return (ret);
803 : }
804 :
805 0 : static int dtls1_get_hello_verify(SSL *s)
806 : {
807 0 : int n, al, ok = 0;
808 : unsigned char *data;
809 : unsigned int cookie_len;
810 :
811 0 : s->first_packet = 1;
812 0 : n = s->method->ssl_get_message(s,
813 : DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
814 : DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
815 : -1, s->max_cert_list, &ok);
816 0 : s->first_packet = 0;
817 :
818 0 : if (!ok)
819 : return ((int)n);
820 :
821 0 : if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
822 0 : s->d1->send_cookie = 0;
823 0 : s->s3->tmp.reuse_message = 1;
824 0 : return (1);
825 : }
826 :
827 0 : data = (unsigned char *)s->init_msg;
828 : #if 0
829 : if (s->method->version != DTLS_ANY_VERSION &&
830 : ((data[0] != (s->version >> 8)) || (data[1] != (s->version & 0xff))))
831 : {
832 : SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY, SSL_R_WRONG_SSL_VERSION);
833 : s->version = (s->version & 0xff00) | data[1];
834 : al = SSL_AD_PROTOCOL_VERSION;
835 : goto f_err;
836 : }
837 : #endif
838 : data += 2;
839 :
840 0 : cookie_len = *(data++);
841 0 : if (cookie_len > sizeof(s->d1->cookie)) {
842 : al = SSL_AD_ILLEGAL_PARAMETER;
843 : goto f_err;
844 : }
845 :
846 0 : memcpy(s->d1->cookie, data, cookie_len);
847 0 : s->d1->cookie_len = cookie_len;
848 :
849 0 : s->d1->send_cookie = 1;
850 0 : return 1;
851 :
852 : f_err:
853 0 : ssl3_send_alert(s, SSL3_AL_FATAL, al);
854 0 : s->state = SSL_ST_ERR;
855 0 : return -1;
856 : }
|
