summaryrefslogtreecommitdiff
path: root/src/lib/libssl/d1_clnt.c
diff options
context:
space:
mode:
authorcvs2svn <admin@example.com>2014-04-13 15:49:51 +0000
committercvs2svn <admin@example.com>2014-04-13 15:49:51 +0000
commit9ef0d5fb5b0acfd35d73a5557198f46525ab1667 (patch)
tree61e7e25839f716a30db270f15cddf0be6903781f /src/lib/libssl/d1_clnt.c
parentff237038a541d51619efa5b36fb251c8dc1e9637 (diff)
downloadopenbsd-butholakala.tar.gz
openbsd-butholakala.tar.bz2
openbsd-butholakala.zip
This commit was manufactured by cvs2git to create tag 'butholakala'.butholakala
Diffstat (limited to 'src/lib/libssl/d1_clnt.c')
-rw-r--r--src/lib/libssl/d1_clnt.c1718
1 files changed, 0 insertions, 1718 deletions
diff --git a/src/lib/libssl/d1_clnt.c b/src/lib/libssl/d1_clnt.c
deleted file mode 100644
index 48e5e06bde..0000000000
--- a/src/lib/libssl/d1_clnt.c
+++ /dev/null
@@ -1,1718 +0,0 @@
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
131static const SSL_METHOD *dtls1_get_client_method(int ver);
132static int dtls1_get_hello_verify(SSL *s);
133
134static const SSL_METHOD *dtls1_get_client_method(int ver)
135 {
136 if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
137 return(DTLSv1_client_method());
138 else
139 return(NULL);
140 }
141
142IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
143 ssl_undefined_function,
144 dtls1_connect,
145 dtls1_get_client_method)
146
147int dtls1_connect(SSL *s)
148 {
149 BUF_MEM *buf=NULL;
150 unsigned long Time=(unsigned long)time(NULL);
151 void (*cb)(const SSL *ssl,int type,int val)=NULL;
152 int ret= -1;
153 int new_state,state,skip=0;
154#ifndef OPENSSL_NO_SCTP
155 unsigned char sctpauthkey[64];
156 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
157#endif
158
159 RAND_add(&Time,sizeof(Time),0);
160 ERR_clear_error();
161 clear_sys_error();
162
163 if (s->info_callback != NULL)
164 cb=s->info_callback;
165 else if (s->ctx->info_callback != NULL)
166 cb=s->ctx->info_callback;
167
168 s->in_handshake++;
169 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
170
171#ifndef OPENSSL_NO_SCTP
172 /* Notify SCTP BIO socket to enter handshake
173 * mode and prevent stream identifier other
174 * than 0. Will be ignored if no SCTP is used.
175 */
176 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
177#endif
178
179#ifndef OPENSSL_NO_HEARTBEATS
180 /* If we're awaiting a HeartbeatResponse, pretend we
181 * already got and don't await it anymore, because
182 * Heartbeats don't make sense during handshakes anyway.
183 */
184 if (s->tlsext_hb_pending)
185 {
186 dtls1_stop_timer(s);
187 s->tlsext_hb_pending = 0;
188 s->tlsext_hb_seq++;
189 }
190#endif
191
192 for (;;)
193 {
194 state=s->state;
195
196 switch(s->state)
197 {
198 case SSL_ST_RENEGOTIATE:
199 s->renegotiate=1;
200 s->state=SSL_ST_CONNECT;
201 s->ctx->stats.sess_connect_renegotiate++;
202 /* break */
203 case SSL_ST_BEFORE:
204 case SSL_ST_CONNECT:
205 case SSL_ST_BEFORE|SSL_ST_CONNECT:
206 case SSL_ST_OK|SSL_ST_CONNECT:
207
208 s->server=0;
209 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
210
211 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
212 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
213 {
214 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
215 ret = -1;
216 goto end;
217 }
218
219 /* s->version=SSL3_VERSION; */
220 s->type=SSL_ST_CONNECT;
221
222 if (s->init_buf == NULL)
223 {
224 if ((buf=BUF_MEM_new()) == NULL)
225 {
226 ret= -1;
227 goto end;
228 }
229 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
230 {
231 ret= -1;
232 goto end;
233 }
234 s->init_buf=buf;
235 buf=NULL;
236 }
237
238 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
239
240 /* setup buffing BIO */
241 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
242
243 /* don't push the buffering BIO quite yet */
244
245 s->state=SSL3_ST_CW_CLNT_HELLO_A;
246 s->ctx->stats.sess_connect++;
247 s->init_num=0;
248 /* mark client_random uninitialized */
249 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
250 s->d1->send_cookie = 0;
251 s->hit = 0;
252 break;
253
254#ifndef OPENSSL_NO_SCTP
255 case DTLS1_SCTP_ST_CR_READ_SOCK:
256
257 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
258 {
259 s->s3->in_read_app_data=2;
260 s->rwstate=SSL_READING;
261 BIO_clear_retry_flags(SSL_get_rbio(s));
262 BIO_set_retry_read(SSL_get_rbio(s));
263 ret = -1;
264 goto end;
265 }
266
267 s->state=s->s3->tmp.next_state;
268 break;
269
270 case DTLS1_SCTP_ST_CW_WRITE_SOCK:
271 /* read app data until dry event */
272
273 ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
274 if (ret < 0) goto end;
275
276 if (ret == 0)
277 {
278 s->s3->in_read_app_data=2;
279 s->rwstate=SSL_READING;
280 BIO_clear_retry_flags(SSL_get_rbio(s));
281 BIO_set_retry_read(SSL_get_rbio(s));
282 ret = -1;
283 goto end;
284 }
285
286 s->state=s->d1->next_state;
287 break;
288#endif
289
290 case SSL3_ST_CW_CLNT_HELLO_A:
291 case SSL3_ST_CW_CLNT_HELLO_B:
292
293 s->shutdown=0;
294
295 /* every DTLS ClientHello resets Finished MAC */
296 ssl3_init_finished_mac(s);
297
298 dtls1_start_timer(s);
299 ret=dtls1_client_hello(s);
300 if (ret <= 0) goto end;
301
302 if ( s->d1->send_cookie)
303 {
304 s->state=SSL3_ST_CW_FLUSH;
305 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
306 }
307 else
308 s->state=SSL3_ST_CR_SRVR_HELLO_A;
309
310 s->init_num=0;
311
312#ifndef OPENSSL_NO_SCTP
313 /* Disable buffering for SCTP */
314 if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
315 {
316#endif
317 /* turn on buffering for the next lot of output */
318 if (s->bbio != s->wbio)
319 s->wbio=BIO_push(s->bbio,s->wbio);
320#ifndef OPENSSL_NO_SCTP
321 }
322#endif
323
324 break;
325
326 case SSL3_ST_CR_SRVR_HELLO_A:
327 case SSL3_ST_CR_SRVR_HELLO_B:
328 ret=ssl3_get_server_hello(s);
329 if (ret <= 0) goto end;
330 else
331 {
332 if (s->hit)
333 {
334#ifndef OPENSSL_NO_SCTP
335 /* Add new shared key for SCTP-Auth,
336 * will be ignored if no SCTP used.
337 */
338 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
339 DTLS1_SCTP_AUTH_LABEL);
340
341 SSL_export_keying_material(s, sctpauthkey,
342 sizeof(sctpauthkey), labelbuffer,
343 sizeof(labelbuffer), NULL, 0, 0);
344
345 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
346 sizeof(sctpauthkey), sctpauthkey);
347#endif
348
349 s->state=SSL3_ST_CR_FINISHED_A;
350 }
351 else
352 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
353 }
354 s->init_num=0;
355 break;
356
357 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
358 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
359
360 ret = dtls1_get_hello_verify(s);
361 if ( ret <= 0)
362 goto end;
363 dtls1_stop_timer(s);
364 if ( s->d1->send_cookie) /* start again, with a cookie */
365 s->state=SSL3_ST_CW_CLNT_HELLO_A;
366 else
367 s->state = SSL3_ST_CR_CERT_A;
368 s->init_num = 0;
369 break;
370
371 case SSL3_ST_CR_CERT_A:
372 case SSL3_ST_CR_CERT_B:
373#ifndef OPENSSL_NO_TLSEXT
374 ret=ssl3_check_finished(s);
375 if (ret <= 0) goto end;
376 if (ret == 2)
377 {
378 s->hit = 1;
379 if (s->tlsext_ticket_expected)
380 s->state=SSL3_ST_CR_SESSION_TICKET_A;
381 else
382 s->state=SSL3_ST_CR_FINISHED_A;
383 s->init_num=0;
384 break;
385 }
386#endif
387 /* Check if it is anon DH or PSK */
388 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
389 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
390 {
391 ret=ssl3_get_server_certificate(s);
392 if (ret <= 0) goto end;
393#ifndef OPENSSL_NO_TLSEXT
394 if (s->tlsext_status_expected)
395 s->state=SSL3_ST_CR_CERT_STATUS_A;
396 else
397 s->state=SSL3_ST_CR_KEY_EXCH_A;
398 }
399 else
400 {
401 skip = 1;
402 s->state=SSL3_ST_CR_KEY_EXCH_A;
403 }
404#else
405 }
406 else
407 skip=1;
408
409 s->state=SSL3_ST_CR_KEY_EXCH_A;
410#endif
411 s->init_num=0;
412 break;
413
414 case SSL3_ST_CR_KEY_EXCH_A:
415 case SSL3_ST_CR_KEY_EXCH_B:
416 ret=ssl3_get_key_exchange(s);
417 if (ret <= 0) goto end;
418 s->state=SSL3_ST_CR_CERT_REQ_A;
419 s->init_num=0;
420
421 /* at this point we check that we have the
422 * required stuff from the server */
423 if (!ssl3_check_cert_and_algorithm(s))
424 {
425 ret= -1;
426 goto end;
427 }
428 break;
429
430 case SSL3_ST_CR_CERT_REQ_A:
431 case SSL3_ST_CR_CERT_REQ_B:
432 ret=ssl3_get_certificate_request(s);
433 if (ret <= 0) goto end;
434 s->state=SSL3_ST_CR_SRVR_DONE_A;
435 s->init_num=0;
436 break;
437
438 case SSL3_ST_CR_SRVR_DONE_A:
439 case SSL3_ST_CR_SRVR_DONE_B:
440 ret=ssl3_get_server_done(s);
441 if (ret <= 0) goto end;
442 dtls1_stop_timer(s);
443 if (s->s3->tmp.cert_req)
444 s->s3->tmp.next_state=SSL3_ST_CW_CERT_A;
445 else
446 s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A;
447 s->init_num=0;
448
449#ifndef OPENSSL_NO_SCTP
450 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
451 state == SSL_ST_RENEGOTIATE)
452 s->state=DTLS1_SCTP_ST_CR_READ_SOCK;
453 else
454#endif
455 s->state=s->s3->tmp.next_state;
456 break;
457
458 case SSL3_ST_CW_CERT_A:
459 case SSL3_ST_CW_CERT_B:
460 case SSL3_ST_CW_CERT_C:
461 case SSL3_ST_CW_CERT_D:
462 dtls1_start_timer(s);
463 ret=dtls1_send_client_certificate(s);
464 if (ret <= 0) goto end;
465 s->state=SSL3_ST_CW_KEY_EXCH_A;
466 s->init_num=0;
467 break;
468
469 case SSL3_ST_CW_KEY_EXCH_A:
470 case SSL3_ST_CW_KEY_EXCH_B:
471 dtls1_start_timer(s);
472 ret=dtls1_send_client_key_exchange(s);
473 if (ret <= 0) goto end;
474
475#ifndef OPENSSL_NO_SCTP
476 /* Add new shared key for SCTP-Auth,
477 * will be ignored if no SCTP used.
478 */
479 snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
480 DTLS1_SCTP_AUTH_LABEL);
481
482 SSL_export_keying_material(s, sctpauthkey,
483 sizeof(sctpauthkey), labelbuffer,
484 sizeof(labelbuffer), NULL, 0, 0);
485
486 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
487 sizeof(sctpauthkey), sctpauthkey);
488#endif
489
490 /* EAY EAY EAY need to check for DH fix cert
491 * sent back */
492 /* For TLS, cert_req is set to 2, so a cert chain
493 * of nothing is sent, but no verify packet is sent */
494 if (s->s3->tmp.cert_req == 1)
495 {
496 s->state=SSL3_ST_CW_CERT_VRFY_A;
497 }
498 else
499 {
500#ifndef OPENSSL_NO_SCTP
501 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
502 {
503 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
504 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
505 }
506 else
507#endif
508 s->state=SSL3_ST_CW_CHANGE_A;
509 s->s3->change_cipher_spec=0;
510 }
511
512 s->init_num=0;
513 break;
514
515 case SSL3_ST_CW_CERT_VRFY_A:
516 case SSL3_ST_CW_CERT_VRFY_B:
517 dtls1_start_timer(s);
518 ret=dtls1_send_client_verify(s);
519 if (ret <= 0) goto end;
520#ifndef OPENSSL_NO_SCTP
521 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
522 {
523 s->d1->next_state=SSL3_ST_CW_CHANGE_A;
524 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
525 }
526 else
527#endif
528 s->state=SSL3_ST_CW_CHANGE_A;
529 s->init_num=0;
530 s->s3->change_cipher_spec=0;
531 break;
532
533 case SSL3_ST_CW_CHANGE_A:
534 case SSL3_ST_CW_CHANGE_B:
535 if (!s->hit)
536 dtls1_start_timer(s);
537 ret=dtls1_send_change_cipher_spec(s,
538 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
539 if (ret <= 0) goto end;
540
541 s->state=SSL3_ST_CW_FINISHED_A;
542 s->init_num=0;
543
544 s->session->cipher=s->s3->tmp.new_cipher;
545#ifdef OPENSSL_NO_COMP
546 s->session->compress_meth=0;
547#else
548 if (s->s3->tmp.new_compression == NULL)
549 s->session->compress_meth=0;
550 else
551 s->session->compress_meth=
552 s->s3->tmp.new_compression->id;
553#endif
554 if (!s->method->ssl3_enc->setup_key_block(s))
555 {
556 ret= -1;
557 goto end;
558 }
559
560 if (!s->method->ssl3_enc->change_cipher_state(s,
561 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
562 {
563 ret= -1;
564 goto end;
565 }
566
567#ifndef OPENSSL_NO_SCTP
568 if (s->hit)
569 {
570 /* Change to new shared key of SCTP-Auth,
571 * will be ignored if no SCTP used.
572 */
573 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
574 }
575#endif
576
577 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
578 break;
579
580 case SSL3_ST_CW_FINISHED_A:
581 case SSL3_ST_CW_FINISHED_B:
582 if (!s->hit)
583 dtls1_start_timer(s);
584 ret=dtls1_send_finished(s,
585 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
586 s->method->ssl3_enc->client_finished_label,
587 s->method->ssl3_enc->client_finished_label_len);
588 if (ret <= 0) goto end;
589 s->state=SSL3_ST_CW_FLUSH;
590
591 /* clear flags */
592 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
593 if (s->hit)
594 {
595 s->s3->tmp.next_state=SSL_ST_OK;
596#ifndef OPENSSL_NO_SCTP
597 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
598 {
599 s->d1->next_state = s->s3->tmp.next_state;
600 s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
601 }
602#endif
603 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
604 {
605 s->state=SSL_ST_OK;
606#ifndef OPENSSL_NO_SCTP
607 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
608 {
609 s->d1->next_state = SSL_ST_OK;
610 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
611 }
612#endif
613 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
614 s->s3->delay_buf_pop_ret=0;
615 }
616 }
617 else
618 {
619#ifndef OPENSSL_NO_SCTP
620 /* Change to new shared key of SCTP-Auth,
621 * will be ignored if no SCTP used.
622 */
623 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
624#endif
625
626#ifndef OPENSSL_NO_TLSEXT
627 /* Allow NewSessionTicket if ticket expected */
628 if (s->tlsext_ticket_expected)
629 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
630 else
631#endif
632
633 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
634 }
635 s->init_num=0;
636 break;
637
638#ifndef OPENSSL_NO_TLSEXT
639 case SSL3_ST_CR_SESSION_TICKET_A:
640 case SSL3_ST_CR_SESSION_TICKET_B:
641 ret=ssl3_get_new_session_ticket(s);
642 if (ret <= 0) goto end;
643 s->state=SSL3_ST_CR_FINISHED_A;
644 s->init_num=0;
645 break;
646
647 case SSL3_ST_CR_CERT_STATUS_A:
648 case SSL3_ST_CR_CERT_STATUS_B:
649 ret=ssl3_get_cert_status(s);
650 if (ret <= 0) goto end;
651 s->state=SSL3_ST_CR_KEY_EXCH_A;
652 s->init_num=0;
653 break;
654#endif
655
656 case SSL3_ST_CR_FINISHED_A:
657 case SSL3_ST_CR_FINISHED_B:
658 s->d1->change_cipher_spec_ok = 1;
659 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
660 SSL3_ST_CR_FINISHED_B);
661 if (ret <= 0) goto end;
662 dtls1_stop_timer(s);
663
664 if (s->hit)
665 s->state=SSL3_ST_CW_CHANGE_A;
666 else
667 s->state=SSL_ST_OK;
668
669#ifndef OPENSSL_NO_SCTP
670 if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
671 state == SSL_ST_RENEGOTIATE)
672 {
673 s->d1->next_state=s->state;
674 s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK;
675 }
676#endif
677
678 s->init_num=0;
679 break;
680
681 case SSL3_ST_CW_FLUSH:
682 s->rwstate=SSL_WRITING;
683 if (BIO_flush(s->wbio) <= 0)
684 {
685 /* If the write error was fatal, stop trying */
686 if (!BIO_should_retry(s->wbio))
687 {
688 s->rwstate=SSL_NOTHING;
689 s->state=s->s3->tmp.next_state;
690 }
691
692 ret= -1;
693 goto end;
694 }
695 s->rwstate=SSL_NOTHING;
696 s->state=s->s3->tmp.next_state;
697 break;
698
699 case SSL_ST_OK:
700 /* clean a few things up */
701 ssl3_cleanup_key_block(s);
702
703#if 0
704 if (s->init_buf != NULL)
705 {
706 BUF_MEM_free(s->init_buf);
707 s->init_buf=NULL;
708 }
709#endif
710
711 /* If we are not 'joining' the last two packets,
712 * remove the buffering now */
713 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
714 ssl_free_wbio_buffer(s);
715 /* else do it later in ssl3_write */
716
717 s->init_num=0;
718 s->renegotiate=0;
719 s->new_session=0;
720
721 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
722 if (s->hit) s->ctx->stats.sess_hit++;
723
724 ret=1;
725 /* s->server=0; */
726 s->handshake_func=dtls1_connect;
727 s->ctx->stats.sess_connect_good++;
728
729 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
730
731 /* done with handshaking */
732 s->d1->handshake_read_seq = 0;
733 s->d1->next_handshake_write_seq = 0;
734 goto end;
735 /* break; */
736
737 default:
738 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
739 ret= -1;
740 goto end;
741 /* break; */
742 }
743
744 /* did we do anything */
745 if (!s->s3->tmp.reuse_message && !skip)
746 {
747 if (s->debug)
748 {
749 if ((ret=BIO_flush(s->wbio)) <= 0)
750 goto end;
751 }
752
753 if ((cb != NULL) && (s->state != state))
754 {
755 new_state=s->state;
756 s->state=state;
757 cb(s,SSL_CB_CONNECT_LOOP,1);
758 s->state=new_state;
759 }
760 }
761 skip=0;
762 }
763end:
764 s->in_handshake--;
765
766#ifndef OPENSSL_NO_SCTP
767 /* Notify SCTP BIO socket to leave handshake
768 * mode and allow stream identifier other
769 * than 0. Will be ignored if no SCTP is used.
770 */
771 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
772#endif
773
774 if (buf != NULL)
775 BUF_MEM_free(buf);
776 if (cb != NULL)
777 cb(s,SSL_CB_CONNECT_EXIT,ret);
778 return(ret);
779 }
780
781int dtls1_client_hello(SSL *s)
782 {
783 unsigned char *buf;
784 unsigned char *p,*d;
785 unsigned int i,j;
786 unsigned long l;
787 SSL_COMP *comp;
788
789 buf=(unsigned char *)s->init_buf->data;
790 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
791 {
792 SSL_SESSION *sess = s->session;
793 if ((s->session == NULL) ||
794 (s->session->ssl_version != s->version) ||
795#ifdef OPENSSL_NO_TLSEXT
796 !sess->session_id_length ||
797#else
798 (!sess->session_id_length && !sess->tlsext_tick) ||
799#endif
800 (s->session->not_resumable))
801 {
802 if (!ssl_get_new_session(s,0))
803 goto err;
804 }
805 /* else use the pre-loaded session */
806
807 p=s->s3->client_random;
808
809 /* if client_random is initialized, reuse it, we are
810 * required to use same upon reply to HelloVerify */
811 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++)
812 ;
813 if (i==sizeof(s->s3->client_random))
814 ssl_fill_hello_random(s, 0, p,
815 sizeof(s->s3->client_random));
816
817 /* Do the message type and length last */
818 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
819
820 *(p++)=s->version>>8;
821 *(p++)=s->version&0xff;
822 s->client_version=s->version;
823
824 /* Random stuff */
825 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
826 p+=SSL3_RANDOM_SIZE;
827
828 /* Session ID */
829 if (s->new_session)
830 i=0;
831 else
832 i=s->session->session_id_length;
833 *(p++)=i;
834 if (i != 0)
835 {
836 if (i > sizeof s->session->session_id)
837 {
838 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
839 goto err;
840 }
841 memcpy(p,s->session->session_id,i);
842 p+=i;
843 }
844
845 /* cookie stuff */
846 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
847 {
848 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
849 goto err;
850 }
851 *(p++) = s->d1->cookie_len;
852 memcpy(p, s->d1->cookie, s->d1->cookie_len);
853 p += s->d1->cookie_len;
854
855 /* Ciphers supported */
856 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
857 if (i == 0)
858 {
859 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
860 goto err;
861 }
862 s2n(i,p);
863 p+=i;
864
865 /* COMPRESSION */
866 if (s->ctx->comp_methods == NULL)
867 j=0;
868 else
869 j=sk_SSL_COMP_num(s->ctx->comp_methods);
870 *(p++)=1+j;
871 for (i=0; i<j; i++)
872 {
873 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
874 *(p++)=comp->id;
875 }
876 *(p++)=0; /* Add the NULL method */
877
878#ifndef OPENSSL_NO_TLSEXT
879 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
880 {
881 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
882 goto err;
883 }
884#endif
885
886 l=(p-d);
887 d=buf;
888
889 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
890
891 s->state=SSL3_ST_CW_CLNT_HELLO_B;
892 /* number of bytes to write */
893 s->init_num=p-buf;
894 s->init_off=0;
895
896 /* buffer the message to handle re-xmits */
897 dtls1_buffer_message(s, 0);
898 }
899
900 /* SSL3_ST_CW_CLNT_HELLO_B */
901 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
902err:
903 return(-1);
904 }
905
906static int dtls1_get_hello_verify(SSL *s)
907 {
908 int n, al, ok = 0;
909 unsigned char *data;
910 unsigned int cookie_len;
911
912 n=s->method->ssl_get_message(s,
913 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
914 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
915 -1,
916 s->max_cert_list,
917 &ok);
918
919 if (!ok) return((int)n);
920
921 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
922 {
923 s->d1->send_cookie = 0;
924 s->s3->tmp.reuse_message=1;
925 return(1);
926 }
927
928 data = (unsigned char *)s->init_msg;
929
930 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
931 {
932 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
933 s->version=(s->version&0xff00)|data[1];
934 al = SSL_AD_PROTOCOL_VERSION;
935 goto f_err;
936 }
937 data+=2;
938
939 cookie_len = *(data++);
940 if ( cookie_len > sizeof(s->d1->cookie))
941 {
942 al=SSL_AD_ILLEGAL_PARAMETER;
943 goto f_err;
944 }
945
946 memcpy(s->d1->cookie, data, cookie_len);
947 s->d1->cookie_len = cookie_len;
948
949 s->d1->send_cookie = 1;
950 return 1;
951
952f_err:
953 ssl3_send_alert(s, SSL3_AL_FATAL, al);
954 return -1;
955 }
956
957int dtls1_send_client_key_exchange(SSL *s)
958 {
959 unsigned char *p,*d;
960 int n;
961 unsigned long alg_k;
962#ifndef OPENSSL_NO_RSA
963 unsigned char *q;
964 EVP_PKEY *pkey=NULL;
965#endif
966#ifndef OPENSSL_NO_KRB5
967 KSSL_ERR kssl_err;
968#endif /* OPENSSL_NO_KRB5 */
969#ifndef OPENSSL_NO_ECDH
970 EC_KEY *clnt_ecdh = NULL;
971 const EC_POINT *srvr_ecpoint = NULL;
972 EVP_PKEY *srvr_pub_pkey = NULL;
973 unsigned char *encodedPoint = NULL;
974 int encoded_pt_len = 0;
975 BN_CTX * bn_ctx = NULL;
976#endif
977
978 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
979 {
980 d=(unsigned char *)s->init_buf->data;
981 p= &(d[DTLS1_HM_HEADER_LENGTH]);
982
983 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
984
985 /* Fool emacs indentation */
986 if (0) {}
987#ifndef OPENSSL_NO_RSA
988 else if (alg_k & SSL_kRSA)
989 {
990 RSA *rsa;
991 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
992
993 if (s->session->sess_cert->peer_rsa_tmp != NULL)
994 rsa=s->session->sess_cert->peer_rsa_tmp;
995 else
996 {
997 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
998 if ((pkey == NULL) ||
999 (pkey->type != EVP_PKEY_RSA) ||
1000 (pkey->pkey.rsa == NULL))
1001 {
1002 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1003 goto err;
1004 }
1005 rsa=pkey->pkey.rsa;
1006 EVP_PKEY_free(pkey);
1007 }
1008
1009 tmp_buf[0]=s->client_version>>8;
1010 tmp_buf[1]=s->client_version&0xff;
1011 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1012 goto err;
1013
1014 s->session->master_key_length=sizeof tmp_buf;
1015
1016 q=p;
1017 /* Fix buf for TLS and [incidentally] DTLS */
1018 if (s->version > SSL3_VERSION)
1019 p+=2;
1020 n=RSA_public_encrypt(sizeof tmp_buf,
1021 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1022#ifdef PKCS1_CHECK
1023 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1024 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1025#endif
1026 if (n <= 0)
1027 {
1028 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1029 goto err;
1030 }
1031
1032 /* Fix buf for TLS and [incidentally] DTLS */
1033 if (s->version > SSL3_VERSION)
1034 {
1035 s2n(n,q);
1036 n+=2;
1037 }
1038
1039 s->session->master_key_length=
1040 s->method->ssl3_enc->generate_master_secret(s,
1041 s->session->master_key,
1042 tmp_buf,sizeof tmp_buf);
1043 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1044 }
1045#endif
1046#ifndef OPENSSL_NO_KRB5
1047 else if (alg_k & SSL_kKRB5)
1048 {
1049 krb5_error_code krb5rc;
1050 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1051 /* krb5_data krb5_ap_req; */
1052 krb5_data *enc_ticket;
1053 krb5_data authenticator, *authp = NULL;
1054 EVP_CIPHER_CTX ciph_ctx;
1055 const EVP_CIPHER *enc = NULL;
1056 unsigned char iv[EVP_MAX_IV_LENGTH];
1057 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1058 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1059 + EVP_MAX_IV_LENGTH];
1060 int padl, outl = sizeof(epms);
1061
1062 EVP_CIPHER_CTX_init(&ciph_ctx);
1063
1064#ifdef KSSL_DEBUG
1065 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1066 alg_k, SSL_kKRB5);
1067#endif /* KSSL_DEBUG */
1068
1069 authp = NULL;
1070#ifdef KRB5SENDAUTH
1071 if (KRB5SENDAUTH) authp = &authenticator;
1072#endif /* KRB5SENDAUTH */
1073
1074 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1075 &kssl_err);
1076 enc = kssl_map_enc(kssl_ctx->enctype);
1077 if (enc == NULL)
1078 goto err;
1079#ifdef KSSL_DEBUG
1080 {
1081 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1082 if (krb5rc && kssl_err.text)
1083 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1084 }
1085#endif /* KSSL_DEBUG */
1086
1087 if (krb5rc)
1088 {
1089 ssl3_send_alert(s,SSL3_AL_FATAL,
1090 SSL_AD_HANDSHAKE_FAILURE);
1091 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1092 kssl_err.reason);
1093 goto err;
1094 }
1095
1096 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1097 ** in place of RFC 2712 KerberosWrapper, as in:
1098 **
1099 ** Send ticket (copy to *p, set n = length)
1100 ** n = krb5_ap_req.length;
1101 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1102 ** if (krb5_ap_req.data)
1103 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1104 **
1105 ** Now using real RFC 2712 KerberosWrapper
1106 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1107 ** Note: 2712 "opaque" types are here replaced
1108 ** with a 2-byte length followed by the value.
1109 ** Example:
1110 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1111 ** Where "xx xx" = length bytes. Shown here with
1112 ** optional authenticator omitted.
1113 */
1114
1115 /* KerberosWrapper.Ticket */
1116 s2n(enc_ticket->length,p);
1117 memcpy(p, enc_ticket->data, enc_ticket->length);
1118 p+= enc_ticket->length;
1119 n = enc_ticket->length + 2;
1120
1121 /* KerberosWrapper.Authenticator */
1122 if (authp && authp->length)
1123 {
1124 s2n(authp->length,p);
1125 memcpy(p, authp->data, authp->length);
1126 p+= authp->length;
1127 n+= authp->length + 2;
1128
1129 free(authp->data);
1130 authp->data = NULL;
1131 authp->length = 0;
1132 }
1133 else
1134 {
1135 s2n(0,p);/* null authenticator length */
1136 n+=2;
1137 }
1138
1139 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1140 goto err;
1141
1142 /* 20010420 VRS. Tried it this way; failed.
1143 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1144 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1145 ** kssl_ctx->length);
1146 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1147 */
1148
1149 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1150 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1151 kssl_ctx->key,iv);
1152 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1153 sizeof tmp_buf);
1154 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1155 outl += padl;
1156 if (outl > (int)sizeof epms)
1157 {
1158 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1159 goto err;
1160 }
1161 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1162
1163 /* KerberosWrapper.EncryptedPreMasterSecret */
1164 s2n(outl,p);
1165 memcpy(p, epms, outl);
1166 p+=outl;
1167 n+=outl + 2;
1168
1169 s->session->master_key_length=
1170 s->method->ssl3_enc->generate_master_secret(s,
1171 s->session->master_key,
1172 tmp_buf, sizeof tmp_buf);
1173
1174 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1175 OPENSSL_cleanse(epms, outl);
1176 }
1177#endif
1178#ifndef OPENSSL_NO_DH
1179 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1180 {
1181 DH *dh_srvr,*dh_clnt;
1182
1183 if (s->session->sess_cert->peer_dh_tmp != NULL)
1184 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1185 else
1186 {
1187 /* we get them from the cert */
1188 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1189 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1190 goto err;
1191 }
1192
1193 /* generate a new random key */
1194 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1195 {
1196 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1197 goto err;
1198 }
1199 if (!DH_generate_key(dh_clnt))
1200 {
1201 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1202 goto err;
1203 }
1204
1205 /* use the 'p' output buffer for the DH key, but
1206 * make sure to clear it out afterwards */
1207
1208 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1209
1210 if (n <= 0)
1211 {
1212 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1213 goto err;
1214 }
1215
1216 /* generate master key from the result */
1217 s->session->master_key_length=
1218 s->method->ssl3_enc->generate_master_secret(s,
1219 s->session->master_key,p,n);
1220 /* clean up */
1221 memset(p,0,n);
1222
1223 /* send off the data */
1224 n=BN_num_bytes(dh_clnt->pub_key);
1225 s2n(n,p);
1226 BN_bn2bin(dh_clnt->pub_key,p);
1227 n+=2;
1228
1229 DH_free(dh_clnt);
1230
1231 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1232 }
1233#endif
1234#ifndef OPENSSL_NO_ECDH
1235 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1236 {
1237 const EC_GROUP *srvr_group = NULL;
1238 EC_KEY *tkey;
1239 int ecdh_clnt_cert = 0;
1240 int field_size = 0;
1241
1242 /* Did we send out the client's
1243 * ECDH share for use in premaster
1244 * computation as part of client certificate?
1245 * If so, set ecdh_clnt_cert to 1.
1246 */
1247 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1248 {
1249 /* XXX: For now, we do not support client
1250 * authentication using ECDH certificates.
1251 * To add such support, one needs to add
1252 * code that checks for appropriate
1253 * conditions and sets ecdh_clnt_cert to 1.
1254 * For example, the cert have an ECC
1255 * key on the same curve as the server's
1256 * and the key should be authorized for
1257 * key agreement.
1258 *
1259 * One also needs to add code in ssl3_connect
1260 * to skip sending the certificate verify
1261 * message.
1262 *
1263 * if ((s->cert->key->privatekey != NULL) &&
1264 * (s->cert->key->privatekey->type ==
1265 * EVP_PKEY_EC) && ...)
1266 * ecdh_clnt_cert = 1;
1267 */
1268 }
1269
1270 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1271 {
1272 tkey = s->session->sess_cert->peer_ecdh_tmp;
1273 }
1274 else
1275 {
1276 /* Get the Server Public Key from Cert */
1277 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1278 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1279 if ((srvr_pub_pkey == NULL) ||
1280 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1281 (srvr_pub_pkey->pkey.ec == NULL))
1282 {
1283 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1284 ERR_R_INTERNAL_ERROR);
1285 goto err;
1286 }
1287
1288 tkey = srvr_pub_pkey->pkey.ec;
1289 }
1290
1291 srvr_group = EC_KEY_get0_group(tkey);
1292 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1293
1294 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1295 {
1296 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1297 ERR_R_INTERNAL_ERROR);
1298 goto err;
1299 }
1300
1301 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1302 {
1303 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1304 goto err;
1305 }
1306
1307 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1308 {
1309 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1310 goto err;
1311 }
1312 if (ecdh_clnt_cert)
1313 {
1314 /* Reuse key info from our certificate
1315 * We only need our private key to perform
1316 * the ECDH computation.
1317 */
1318 const BIGNUM *priv_key;
1319 tkey = s->cert->key->privatekey->pkey.ec;
1320 priv_key = EC_KEY_get0_private_key(tkey);
1321 if (priv_key == NULL)
1322 {
1323 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1324 goto err;
1325 }
1326 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1327 {
1328 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1329 goto err;
1330 }
1331 }
1332 else
1333 {
1334 /* Generate a new ECDH key pair */
1335 if (!(EC_KEY_generate_key(clnt_ecdh)))
1336 {
1337 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1338 goto err;
1339 }
1340 }
1341
1342 /* use the 'p' output buffer for the ECDH key, but
1343 * make sure to clear it out afterwards
1344 */
1345
1346 field_size = EC_GROUP_get_degree(srvr_group);
1347 if (field_size <= 0)
1348 {
1349 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1350 ERR_R_ECDH_LIB);
1351 goto err;
1352 }
1353 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1354 if (n <= 0)
1355 {
1356 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1357 ERR_R_ECDH_LIB);
1358 goto err;
1359 }
1360
1361 /* generate master key from the result */
1362 s->session->master_key_length = s->method->ssl3_enc \
1363 -> generate_master_secret(s,
1364 s->session->master_key,
1365 p, n);
1366
1367 memset(p, 0, n); /* clean up */
1368
1369 if (ecdh_clnt_cert)
1370 {
1371 /* Send empty client key exch message */
1372 n = 0;
1373 }
1374 else
1375 {
1376 /* First check the size of encoding and
1377 * allocate memory accordingly.
1378 */
1379 encoded_pt_len =
1380 EC_POINT_point2oct(srvr_group,
1381 EC_KEY_get0_public_key(clnt_ecdh),
1382 POINT_CONVERSION_UNCOMPRESSED,
1383 NULL, 0, NULL);
1384
1385 encodedPoint = (unsigned char *)
1386 OPENSSL_malloc(encoded_pt_len *
1387 sizeof(unsigned char));
1388 bn_ctx = BN_CTX_new();
1389 if ((encodedPoint == NULL) ||
1390 (bn_ctx == NULL))
1391 {
1392 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1393 goto err;
1394 }
1395
1396 /* Encode the public key */
1397 n = EC_POINT_point2oct(srvr_group,
1398 EC_KEY_get0_public_key(clnt_ecdh),
1399 POINT_CONVERSION_UNCOMPRESSED,
1400 encodedPoint, encoded_pt_len, bn_ctx);
1401
1402 *p = n; /* length of encoded point */
1403 /* Encoded point will be copied here */
1404 p += 1;
1405 /* copy the point */
1406 memcpy((unsigned char *)p, encodedPoint, n);
1407 /* increment n to account for length field */
1408 n += 1;
1409 }
1410
1411 /* Free allocated memory */
1412 BN_CTX_free(bn_ctx);
1413 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1414 if (clnt_ecdh != NULL)
1415 EC_KEY_free(clnt_ecdh);
1416 EVP_PKEY_free(srvr_pub_pkey);
1417 }
1418#endif /* !OPENSSL_NO_ECDH */
1419
1420#ifndef OPENSSL_NO_PSK
1421 else if (alg_k & SSL_kPSK)
1422 {
1423 char identity[PSK_MAX_IDENTITY_LEN];
1424 unsigned char *t = NULL;
1425 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1426 unsigned int pre_ms_len = 0, psk_len = 0;
1427 int psk_err = 1;
1428
1429 n = 0;
1430 if (s->psk_client_callback == NULL)
1431 {
1432 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1433 SSL_R_PSK_NO_CLIENT_CB);
1434 goto err;
1435 }
1436
1437 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1438 identity, PSK_MAX_IDENTITY_LEN,
1439 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1440 if (psk_len > PSK_MAX_PSK_LEN)
1441 {
1442 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1443 ERR_R_INTERNAL_ERROR);
1444 goto psk_err;
1445 }
1446 else if (psk_len == 0)
1447 {
1448 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1449 SSL_R_PSK_IDENTITY_NOT_FOUND);
1450 goto psk_err;
1451 }
1452
1453 /* create PSK pre_master_secret */
1454 pre_ms_len = 2+psk_len+2+psk_len;
1455 t = psk_or_pre_ms;
1456 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1457 s2n(psk_len, t);
1458 memset(t, 0, psk_len);
1459 t+=psk_len;
1460 s2n(psk_len, t);
1461
1462 if (s->session->psk_identity_hint != NULL)
1463 OPENSSL_free(s->session->psk_identity_hint);
1464 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1465 if (s->ctx->psk_identity_hint != NULL &&
1466 s->session->psk_identity_hint == NULL)
1467 {
1468 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1469 ERR_R_MALLOC_FAILURE);
1470 goto psk_err;
1471 }
1472
1473 if (s->session->psk_identity != NULL)
1474 OPENSSL_free(s->session->psk_identity);
1475 s->session->psk_identity = BUF_strdup(identity);
1476 if (s->session->psk_identity == NULL)
1477 {
1478 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1479 ERR_R_MALLOC_FAILURE);
1480 goto psk_err;
1481 }
1482
1483 s->session->master_key_length =
1484 s->method->ssl3_enc->generate_master_secret(s,
1485 s->session->master_key,
1486 psk_or_pre_ms, pre_ms_len);
1487 n = strlen(identity);
1488 s2n(n, p);
1489 memcpy(p, identity, n);
1490 n+=2;
1491 psk_err = 0;
1492 psk_err:
1493 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1494 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1495 if (psk_err != 0)
1496 {
1497 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1498 goto err;
1499 }
1500 }
1501#endif
1502 else
1503 {
1504 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1505 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1506 goto err;
1507 }
1508
1509 d = dtls1_set_message_header(s, d,
1510 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1511 /*
1512 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1513 l2n3(n,d);
1514 l2n(s->d1->handshake_write_seq,d);
1515 s->d1->handshake_write_seq++;
1516 */
1517
1518 s->state=SSL3_ST_CW_KEY_EXCH_B;
1519 /* number of bytes to write */
1520 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1521 s->init_off=0;
1522
1523 /* buffer the message to handle re-xmits */
1524 dtls1_buffer_message(s, 0);
1525 }
1526
1527 /* SSL3_ST_CW_KEY_EXCH_B */
1528 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1529err:
1530#ifndef OPENSSL_NO_ECDH
1531 BN_CTX_free(bn_ctx);
1532 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1533 if (clnt_ecdh != NULL)
1534 EC_KEY_free(clnt_ecdh);
1535 EVP_PKEY_free(srvr_pub_pkey);
1536#endif
1537 return(-1);
1538 }
1539
1540int dtls1_send_client_verify(SSL *s)
1541 {
1542 unsigned char *p,*d;
1543 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1544 EVP_PKEY *pkey;
1545#ifndef OPENSSL_NO_RSA
1546 unsigned u=0;
1547#endif
1548 unsigned long n;
1549#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1550 int j;
1551#endif
1552
1553 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1554 {
1555 d=(unsigned char *)s->init_buf->data;
1556 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1557 pkey=s->cert->key->privatekey;
1558
1559 s->method->ssl3_enc->cert_verify_mac(s,
1560 NID_sha1,
1561 &(data[MD5_DIGEST_LENGTH]));
1562
1563#ifndef OPENSSL_NO_RSA
1564 if (pkey->type == EVP_PKEY_RSA)
1565 {
1566 s->method->ssl3_enc->cert_verify_mac(s,
1567 NID_md5,
1568 &(data[0]));
1569 if (RSA_sign(NID_md5_sha1, data,
1570 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1571 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1572 {
1573 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1574 goto err;
1575 }
1576 s2n(u,p);
1577 n=u+2;
1578 }
1579 else
1580#endif
1581#ifndef OPENSSL_NO_DSA
1582 if (pkey->type == EVP_PKEY_DSA)
1583 {
1584 if (!DSA_sign(pkey->save_type,
1585 &(data[MD5_DIGEST_LENGTH]),
1586 SHA_DIGEST_LENGTH,&(p[2]),
1587 (unsigned int *)&j,pkey->pkey.dsa))
1588 {
1589 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1590 goto err;
1591 }
1592 s2n(j,p);
1593 n=j+2;
1594 }
1595 else
1596#endif
1597#ifndef OPENSSL_NO_ECDSA
1598 if (pkey->type == EVP_PKEY_EC)
1599 {
1600 if (!ECDSA_sign(pkey->save_type,
1601 &(data[MD5_DIGEST_LENGTH]),
1602 SHA_DIGEST_LENGTH,&(p[2]),
1603 (unsigned int *)&j,pkey->pkey.ec))
1604 {
1605 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1606 ERR_R_ECDSA_LIB);
1607 goto err;
1608 }
1609 s2n(j,p);
1610 n=j+2;
1611 }
1612 else
1613#endif
1614 {
1615 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1616 goto err;
1617 }
1618
1619 d = dtls1_set_message_header(s, d,
1620 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1621
1622 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1623 s->init_off=0;
1624
1625 /* buffer the message to handle re-xmits */
1626 dtls1_buffer_message(s, 0);
1627
1628 s->state = SSL3_ST_CW_CERT_VRFY_B;
1629 }
1630
1631 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1632 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1633err:
1634 return(-1);
1635 }
1636
1637int dtls1_send_client_certificate(SSL *s)
1638 {
1639 X509 *x509=NULL;
1640 EVP_PKEY *pkey=NULL;
1641 int i;
1642 unsigned long l;
1643
1644 if (s->state == SSL3_ST_CW_CERT_A)
1645 {
1646 if ((s->cert == NULL) ||
1647 (s->cert->key->x509 == NULL) ||
1648 (s->cert->key->privatekey == NULL))
1649 s->state=SSL3_ST_CW_CERT_B;
1650 else
1651 s->state=SSL3_ST_CW_CERT_C;
1652 }
1653
1654 /* We need to get a client cert */
1655 if (s->state == SSL3_ST_CW_CERT_B)
1656 {
1657 /* If we get an error, we need to
1658 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1659 * We then get retied later */
1660 i=0;
1661 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1662 if (i < 0)
1663 {
1664 s->rwstate=SSL_X509_LOOKUP;
1665 return(-1);
1666 }
1667 s->rwstate=SSL_NOTHING;
1668 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1669 {
1670 s->state=SSL3_ST_CW_CERT_B;
1671 if ( !SSL_use_certificate(s,x509) ||
1672 !SSL_use_PrivateKey(s,pkey))
1673 i=0;
1674 }
1675 else if (i == 1)
1676 {
1677 i=0;
1678 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1679 }
1680
1681 if (x509 != NULL) X509_free(x509);
1682 if (pkey != NULL) EVP_PKEY_free(pkey);
1683 if (i == 0)
1684 {
1685 if (s->version == SSL3_VERSION)
1686 {
1687 s->s3->tmp.cert_req=0;
1688 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1689 return(1);
1690 }
1691 else
1692 {
1693 s->s3->tmp.cert_req=2;
1694 }
1695 }
1696
1697 /* Ok, we have a cert */
1698 s->state=SSL3_ST_CW_CERT_C;
1699 }
1700
1701 if (s->state == SSL3_ST_CW_CERT_C)
1702 {
1703 s->state=SSL3_ST_CW_CERT_D;
1704 l=dtls1_output_cert_chain(s,
1705 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1706 s->init_num=(int)l;
1707 s->init_off=0;
1708
1709 /* set header called by dtls1_output_cert_chain() */
1710
1711 /* buffer the message to handle re-xmits */
1712 dtls1_buffer_message(s, 0);
1713 }
1714 /* SSL3_ST_CW_CERT_D */
1715 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1716 }
1717
1718
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-09 06:53:48 +0000