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[netbsd-mini2440.git] / crypto / external / bsd / openssl / dist / ssl / d1_clnt.c
blob5317a51180b61c69694d8ee006b5a0d835f35ad5
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 static 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
142 IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
143 ssl_undefined_function,
144 dtls1_connect,
145 dtls1_get_client_method)
146
147 int dtls1_connect(SSL *s)
148 {
149 BUF_MEM *buf=NULL;
150 unsigned long Time=(unsigned long)time(NULL);
151 long num1;
152 void (*cb)(const SSL *ssl,int type,int val)=NULL;
153 int ret= -1;
154 int new_state,state,skip=0;;
155
156 RAND_add(&Time,sizeof(Time),0);
157 ERR_clear_error();
158 clear_sys_error();
159
160 if (s->info_callback != NULL)
161 cb=s->info_callback;
162 else if (s->ctx->info_callback != NULL)
163 cb=s->ctx->info_callback;
164
165 s->in_handshake++;
166 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
167
168 for (;;)
169 {
170 state=s->state;
171
172 switch(s->state)
173 {
174 case SSL_ST_RENEGOTIATE:
175 s->new_session=1;
176 s->state=SSL_ST_CONNECT;
177 s->ctx->stats.sess_connect_renegotiate++;
178 /* break */
179 case SSL_ST_BEFORE:
180 case SSL_ST_CONNECT:
181 case SSL_ST_BEFORE|SSL_ST_CONNECT:
182 case SSL_ST_OK|SSL_ST_CONNECT:
183
184 s->server=0;
185 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
186
187 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
188 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
189 {
190 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
191 ret = -1;
192 goto end;
193 }
194
195 /* s->version=SSL3_VERSION; */
196 s->type=SSL_ST_CONNECT;
197
198 if (s->init_buf == NULL)
199 {
200 if ((buf=BUF_MEM_new()) == NULL)
201 {
202 ret= -1;
203 goto end;
204 }
205 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
206 {
207 ret= -1;
208 goto end;
209 }
210 s->init_buf=buf;
211 buf=NULL;
212 }
213
214 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
215
216 /* setup buffing BIO */
217 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
218
219 /* don't push the buffering BIO quite yet */
220
221 s->state=SSL3_ST_CW_CLNT_HELLO_A;
222 s->ctx->stats.sess_connect++;
223 s->init_num=0;
224 /* mark client_random uninitialized */
225 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
226 s->d1->send_cookie = 0;
227 s->hit = 0;
228 break;
229
230 case SSL3_ST_CW_CLNT_HELLO_A:
231 case SSL3_ST_CW_CLNT_HELLO_B:
232
233 s->shutdown=0;
234
235 /* every DTLS ClientHello resets Finished MAC */
236 ssl3_init_finished_mac(s);
237
238 dtls1_start_timer(s);
239 ret=dtls1_client_hello(s);
240 if (ret <= 0) goto end;
241
242 if ( s->d1->send_cookie)
243 {
244 s->state=SSL3_ST_CW_FLUSH;
245 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
246 }
247 else
248 s->state=SSL3_ST_CR_SRVR_HELLO_A;
249
250 s->init_num=0;
251
252 /* turn on buffering for the next lot of output */
253 if (s->bbio != s->wbio)
254 s->wbio=BIO_push(s->bbio,s->wbio);
255
256 break;
257
258 case SSL3_ST_CR_SRVR_HELLO_A:
259 case SSL3_ST_CR_SRVR_HELLO_B:
260 ret=ssl3_get_server_hello(s);
261 if (ret <= 0) goto end;
262 else
263 {
264 dtls1_stop_timer(s);
265 if (s->hit)
266 s->state=SSL3_ST_CR_FINISHED_A;
267 else
268 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
269 }
270 s->init_num=0;
271 break;
272
273 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
274 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
275
276 ret = dtls1_get_hello_verify(s);
277 if ( ret <= 0)
278 goto end;
279 dtls1_stop_timer(s);
280 if ( s->d1->send_cookie) /* start again, with a cookie */
281 s->state=SSL3_ST_CW_CLNT_HELLO_A;
282 else
283 s->state = SSL3_ST_CR_CERT_A;
284 s->init_num = 0;
285 break;
286
287 case SSL3_ST_CR_CERT_A:
288 case SSL3_ST_CR_CERT_B:
289 #ifndef OPENSSL_NO_TLSEXT
290 ret=ssl3_check_finished(s);
291 if (ret <= 0) goto end;
292 if (ret == 2)
293 {
294 s->hit = 1;
295 if (s->tlsext_ticket_expected)
296 s->state=SSL3_ST_CR_SESSION_TICKET_A;
297 else
298 s->state=SSL3_ST_CR_FINISHED_A;
299 s->init_num=0;
300 break;
301 }
302 #endif
303 /* Check if it is anon DH or PSK */
304 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
305 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
306 {
307 ret=ssl3_get_server_certificate(s);
308 if (ret <= 0) goto end;
309 #ifndef OPENSSL_NO_TLSEXT
310 if (s->tlsext_status_expected)
311 s->state=SSL3_ST_CR_CERT_STATUS_A;
312 else
313 s->state=SSL3_ST_CR_KEY_EXCH_A;
314 }
315 else
316 {
317 skip = 1;
318 s->state=SSL3_ST_CR_KEY_EXCH_A;
319 }
320 #else
321 }
322 else
323 skip=1;
324
325 s->state=SSL3_ST_CR_KEY_EXCH_A;
326 #endif
327 s->init_num=0;
328 break;
329
330 case SSL3_ST_CR_KEY_EXCH_A:
331 case SSL3_ST_CR_KEY_EXCH_B:
332 ret=ssl3_get_key_exchange(s);
333 if (ret <= 0) goto end;
334 s->state=SSL3_ST_CR_CERT_REQ_A;
335 s->init_num=0;
336
337 /* at this point we check that we have the
338 * required stuff from the server */
339 if (!ssl3_check_cert_and_algorithm(s))
340 {
341 ret= -1;
342 goto end;
343 }
344 break;
345
346 case SSL3_ST_CR_CERT_REQ_A:
347 case SSL3_ST_CR_CERT_REQ_B:
348 ret=ssl3_get_certificate_request(s);
349 if (ret <= 0) goto end;
350 s->state=SSL3_ST_CR_SRVR_DONE_A;
351 s->init_num=0;
352 break;
353
354 case SSL3_ST_CR_SRVR_DONE_A:
355 case SSL3_ST_CR_SRVR_DONE_B:
356 ret=ssl3_get_server_done(s);
357 if (ret <= 0) goto end;
358 if (s->s3->tmp.cert_req)
359 s->state=SSL3_ST_CW_CERT_A;
360 else
361 s->state=SSL3_ST_CW_KEY_EXCH_A;
362 s->init_num=0;
363
364 break;
365
366 case SSL3_ST_CW_CERT_A:
367 case SSL3_ST_CW_CERT_B:
368 case SSL3_ST_CW_CERT_C:
369 case SSL3_ST_CW_CERT_D:
370 dtls1_start_timer(s);
371 ret=dtls1_send_client_certificate(s);
372 if (ret <= 0) goto end;
373 s->state=SSL3_ST_CW_KEY_EXCH_A;
374 s->init_num=0;
375 break;
376
377 case SSL3_ST_CW_KEY_EXCH_A:
378 case SSL3_ST_CW_KEY_EXCH_B:
379 dtls1_start_timer(s);
380 ret=dtls1_send_client_key_exchange(s);
381 if (ret <= 0) goto end;
382 /* EAY EAY EAY need to check for DH fix cert
383 * sent back */
384 /* For TLS, cert_req is set to 2, so a cert chain
385 * of nothing is sent, but no verify packet is sent */
386 if (s->s3->tmp.cert_req == 1)
387 {
388 s->state=SSL3_ST_CW_CERT_VRFY_A;
389 }
390 else
391 {
392 s->state=SSL3_ST_CW_CHANGE_A;
393 s->s3->change_cipher_spec=0;
394 }
395
396 s->init_num=0;
397 break;
398
399 case SSL3_ST_CW_CERT_VRFY_A:
400 case SSL3_ST_CW_CERT_VRFY_B:
401 dtls1_start_timer(s);
402 ret=dtls1_send_client_verify(s);
403 if (ret <= 0) goto end;
404 s->state=SSL3_ST_CW_CHANGE_A;
405 s->init_num=0;
406 s->s3->change_cipher_spec=0;
407 break;
408
409 case SSL3_ST_CW_CHANGE_A:
410 case SSL3_ST_CW_CHANGE_B:
411 dtls1_start_timer(s);
412 ret=dtls1_send_change_cipher_spec(s,
413 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
414 if (ret <= 0) goto end;
415 s->state=SSL3_ST_CW_FINISHED_A;
416 s->init_num=0;
417
418 s->session->cipher=s->s3->tmp.new_cipher;
419 #ifdef OPENSSL_NO_COMP
420 s->session->compress_meth=0;
421 #else
422 if (s->s3->tmp.new_compression == NULL)
423 s->session->compress_meth=0;
424 else
425 s->session->compress_meth=
426 s->s3->tmp.new_compression->id;
427 #endif
428 if (!s->method->ssl3_enc->setup_key_block(s))
429 {
430 ret= -1;
431 goto end;
432 }
433
434 if (!s->method->ssl3_enc->change_cipher_state(s,
435 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
436 {
437 ret= -1;
438 goto end;
439 }
440
441 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
442 break;
443
444 case SSL3_ST_CW_FINISHED_A:
445 case SSL3_ST_CW_FINISHED_B:
446 dtls1_start_timer(s);
447 ret=dtls1_send_finished(s,
448 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
449 s->method->ssl3_enc->client_finished_label,
450 s->method->ssl3_enc->client_finished_label_len);
451 if (ret <= 0) goto end;
452 s->state=SSL3_ST_CW_FLUSH;
453
454 /* clear flags */
455 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
456 if (s->hit)
457 {
458 s->s3->tmp.next_state=SSL_ST_OK;
459 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
460 {
461 s->state=SSL_ST_OK;
462 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
463 s->s3->delay_buf_pop_ret=0;
464 }
465 }
466 else
467 {
468 #ifndef OPENSSL_NO_TLSEXT
469 /* Allow NewSessionTicket if ticket expected */
470 if (s->tlsext_ticket_expected)
471 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
472 else
473 #endif
474
475 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
476 }
477 s->init_num=0;
478 break;
479
480 #ifndef OPENSSL_NO_TLSEXT
481 case SSL3_ST_CR_SESSION_TICKET_A:
482 case SSL3_ST_CR_SESSION_TICKET_B:
483 ret=ssl3_get_new_session_ticket(s);
484 if (ret <= 0) goto end;
485 s->state=SSL3_ST_CR_FINISHED_A;
486 s->init_num=0;
487 break;
488
489 case SSL3_ST_CR_CERT_STATUS_A:
490 case SSL3_ST_CR_CERT_STATUS_B:
491 ret=ssl3_get_cert_status(s);
492 if (ret <= 0) goto end;
493 s->state=SSL3_ST_CR_KEY_EXCH_A;
494 s->init_num=0;
495 break;
496 #endif
497
498 case SSL3_ST_CR_FINISHED_A:
499 case SSL3_ST_CR_FINISHED_B:
500 s->d1->change_cipher_spec_ok = 1;
501 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
502 SSL3_ST_CR_FINISHED_B);
503 if (ret <= 0) goto end;
504 dtls1_stop_timer(s);
505
506 if (s->hit)
507 s->state=SSL3_ST_CW_CHANGE_A;
508 else
509 s->state=SSL_ST_OK;
510 s->init_num=0;
511 break;
512
513 case SSL3_ST_CW_FLUSH:
514 /* number of bytes to be flushed */
515 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
516 if (num1 > 0)
517 {
518 s->rwstate=SSL_WRITING;
519 num1=BIO_flush(s->wbio);
520 if (num1 <= 0) { ret= -1; goto end; }
521 s->rwstate=SSL_NOTHING;
522 }
523
524 s->state=s->s3->tmp.next_state;
525 break;
526
527 case SSL_ST_OK:
528 /* clean a few things up */
529 ssl3_cleanup_key_block(s);
530
531 #if 0
532 if (s->init_buf != NULL)
533 {
534 BUF_MEM_free(s->init_buf);
535 s->init_buf=NULL;
536 }
537 #endif
538
539 /* If we are not 'joining' the last two packets,
540 * remove the buffering now */
541 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
542 ssl_free_wbio_buffer(s);
543 /* else do it later in ssl3_write */
544
545 s->init_num=0;
546 s->new_session=0;
547
548 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
549 if (s->hit) s->ctx->stats.sess_hit++;
550
551 ret=1;
552 /* s->server=0; */
553 s->handshake_func=dtls1_connect;
554 s->ctx->stats.sess_connect_good++;
555
556 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
557
558 /* done with handshaking */
559 s->d1->handshake_read_seq = 0;
560 s->d1->next_handshake_write_seq = 0;
561 goto end;
562 /* break; */
563
564 default:
565 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
566 ret= -1;
567 goto end;
568 /* break; */
569 }
570
571 /* did we do anything */
572 if (!s->s3->tmp.reuse_message && !skip)
573 {
574 if (s->debug)
575 {
576 if ((ret=BIO_flush(s->wbio)) <= 0)
577 goto end;
578 }
579
580 if ((cb != NULL) && (s->state != state))
581 {
582 new_state=s->state;
583 s->state=state;
584 cb(s,SSL_CB_CONNECT_LOOP,1);
585 s->state=new_state;
586 }
587 }
588 skip=0;
589 }
590 end:
591 s->in_handshake--;
592 if (buf != NULL)
593 BUF_MEM_free(buf);
594 if (cb != NULL)
595 cb(s,SSL_CB_CONNECT_EXIT,ret);
596 return(ret);
597 }
598
599 int dtls1_client_hello(SSL *s)
600 {
601 unsigned char *buf;
602 unsigned char *p,*d;
603 unsigned int i,j;
604 unsigned long Time,l;
605 SSL_COMP *comp;
606
607 buf=(unsigned char *)s->init_buf->data;
608 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
609 {
610 SSL_SESSION *sess = s->session;
611 if ((s->session == NULL) ||
612 (s->session->ssl_version != s->version) ||
613 #ifdef OPENSSL_NO_TLSEXT
614 !sess->session_id_length ||
615 #else
616 (!sess->session_id_length && !sess->tlsext_tick) ||
617 #endif
618 (s->session->not_resumable))
619 {
620 if (!ssl_get_new_session(s,0))
621 goto err;
622 }
623 /* else use the pre-loaded session */
624
625 p=s->s3->client_random;
626
627 /* if client_random is initialized, reuse it, we are
628 * required to use same upon reply to HelloVerify */
629 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
630 if (i==sizeof(s->s3->client_random))
631 {
632 Time=(unsigned long)time(NULL); /* Time */
633 l2n(Time,p);
634 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
635 }
636
637 /* Do the message type and length last */
638 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
639
640 *(p++)=s->version>>8;
641 *(p++)=s->version&0xff;
642 s->client_version=s->version;
643
644 /* Random stuff */
645 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
646 p+=SSL3_RANDOM_SIZE;
647
648 /* Session ID */
649 if (s->new_session)
650 i=0;
651 else
652 i=s->session->session_id_length;
653 *(p++)=i;
654 if (i != 0)
655 {
656 if (i > sizeof s->session->session_id)
657 {
658 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
659 goto err;
660 }
661 memcpy(p,s->session->session_id,i);
662 p+=i;
663 }
664
665 /* cookie stuff */
666 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
667 {
668 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
669 goto err;
670 }
671 *(p++) = s->d1->cookie_len;
672 memcpy(p, s->d1->cookie, s->d1->cookie_len);
673 p += s->d1->cookie_len;
674
675 /* Ciphers supported */
676 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
677 if (i == 0)
678 {
679 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
680 goto err;
681 }
682 s2n(i,p);
683 p+=i;
684
685 /* COMPRESSION */
686 if (s->ctx->comp_methods == NULL)
687 j=0;
688 else
689 j=sk_SSL_COMP_num(s->ctx->comp_methods);
690 *(p++)=1+j;
691 for (i=0; i<j; i++)
692 {
693 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
694 *(p++)=comp->id;
695 }
696 *(p++)=0; /* Add the NULL method */
697
698 #ifndef OPENSSL_NO_TLSEXT
699 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
700 {
701 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
702 goto err;
703 }
704 #endif
705
706 l=(p-d);
707 d=buf;
708
709 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
710
711 s->state=SSL3_ST_CW_CLNT_HELLO_B;
712 /* number of bytes to write */
713 s->init_num=p-buf;
714 s->init_off=0;
715
716 /* buffer the message to handle re-xmits */
717 dtls1_buffer_message(s, 0);
718 }
719
720 /* SSL3_ST_CW_CLNT_HELLO_B */
721 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
722 err:
723 return(-1);
724 }
725
726 static int dtls1_get_hello_verify(SSL *s)
727 {
728 int n, al, ok = 0;
729 unsigned char *data;
730 unsigned int cookie_len;
731
732 n=s->method->ssl_get_message(s,
733 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
734 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
735 -1,
736 s->max_cert_list,
737 &ok);
738
739 if (!ok) return((int)n);
740
741 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
742 {
743 s->d1->send_cookie = 0;
744 s->s3->tmp.reuse_message=1;
745 return(1);
746 }
747
748 data = (unsigned char *)s->init_msg;
749
750 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
751 {
752 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
753 s->version=(s->version&0xff00)|data[1];
754 al = SSL_AD_PROTOCOL_VERSION;
755 goto f_err;
756 }
757 data+=2;
758
759 cookie_len = *(data++);
760 if ( cookie_len > sizeof(s->d1->cookie))
761 {
762 al=SSL_AD_ILLEGAL_PARAMETER;
763 goto f_err;
764 }
765
766 memcpy(s->d1->cookie, data, cookie_len);
767 s->d1->cookie_len = cookie_len;
768
769 s->d1->send_cookie = 1;
770 return 1;
771
772 f_err:
773 ssl3_send_alert(s, SSL3_AL_FATAL, al);
774 return -1;
775 }
776
777 int dtls1_send_client_key_exchange(SSL *s)
778 {
779 unsigned char *p,*d;
780 int n;
781 unsigned long alg_k;
782 #ifndef OPENSSL_NO_RSA
783 unsigned char *q;
784 EVP_PKEY *pkey=NULL;
785 #endif
786 #ifndef OPENSSL_NO_KRB5
787 KSSL_ERR kssl_err;
788 #endif /* OPENSSL_NO_KRB5 */
789 #ifndef OPENSSL_NO_ECDH
790 EC_KEY *clnt_ecdh = NULL;
791 const EC_POINT *srvr_ecpoint = NULL;
792 EVP_PKEY *srvr_pub_pkey = NULL;
793 unsigned char *encodedPoint = NULL;
794 int encoded_pt_len = 0;
795 BN_CTX * bn_ctx = NULL;
796 #endif
797
798 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
799 {
800 d=(unsigned char *)s->init_buf->data;
801 p= &(d[DTLS1_HM_HEADER_LENGTH]);
802
803 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
804
805 /* Fool emacs indentation */
806 if (0) {}
807 #ifndef OPENSSL_NO_RSA
808 else if (alg_k & SSL_kRSA)
809 {
810 RSA *rsa;
811 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
812
813 if (s->session->sess_cert->peer_rsa_tmp != NULL)
814 rsa=s->session->sess_cert->peer_rsa_tmp;
815 else
816 {
817 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
818 if ((pkey == NULL) ||
819 (pkey->type != EVP_PKEY_RSA) ||
820 (pkey->pkey.rsa == NULL))
821 {
822 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
823 goto err;
824 }
825 rsa=pkey->pkey.rsa;
826 EVP_PKEY_free(pkey);
827 }
828
829 tmp_buf[0]=s->client_version>>8;
830 tmp_buf[1]=s->client_version&0xff;
831 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
832 goto err;
833
834 s->session->master_key_length=sizeof tmp_buf;
835
836 q=p;
837 /* Fix buf for TLS and [incidentally] DTLS */
838 if (s->version > SSL3_VERSION)
839 p+=2;
840 n=RSA_public_encrypt(sizeof tmp_buf,
841 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
842 #ifdef PKCS1_CHECK
843 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
844 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
845 #endif
846 if (n <= 0)
847 {
848 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
849 goto err;
850 }
851
852 /* Fix buf for TLS and [incidentally] DTLS */
853 if (s->version > SSL3_VERSION)
854 {
855 s2n(n,q);
856 n+=2;
857 }
858
859 s->session->master_key_length=
860 s->method->ssl3_enc->generate_master_secret(s,
861 s->session->master_key,
862 tmp_buf,sizeof tmp_buf);
863 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
864 }
865 #endif
866 #ifndef OPENSSL_NO_KRB5
867 else if (alg_k & SSL_kKRB5)
868 {
869 krb5_error_code krb5rc;
870 KSSL_CTX *kssl_ctx = s->kssl_ctx;
871 /* krb5_data krb5_ap_req; */
872 krb5_data *enc_ticket;
873 krb5_data authenticator, *authp = NULL;
874 EVP_CIPHER_CTX ciph_ctx;
875 const EVP_CIPHER *enc = NULL;
876 unsigned char iv[EVP_MAX_IV_LENGTH];
877 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
878 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
879 + EVP_MAX_IV_LENGTH];
880 int padl, outl = sizeof(epms);
881
882 EVP_CIPHER_CTX_init(&ciph_ctx);
883
884 #ifdef KSSL_DEBUG
885 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
886 alg_k, SSL_kKRB5);
887 #endif /* KSSL_DEBUG */
888
889 authp = NULL;
890 #ifdef KRB5SENDAUTH
891 if (KRB5SENDAUTH) authp = &authenticator;
892 #endif /* KRB5SENDAUTH */
893
894 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
895 &kssl_err);
896 enc = kssl_map_enc(kssl_ctx->enctype);
897 if (enc == NULL)
898 goto err;
899 #ifdef KSSL_DEBUG
900 {
901 printf("kssl_cget_tkt rtn %d\n", krb5rc);
902 if (krb5rc && kssl_err.text)
903 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
904 }
905 #endif /* KSSL_DEBUG */
906
907 if (krb5rc)
908 {
909 ssl3_send_alert(s,SSL3_AL_FATAL,
910 SSL_AD_HANDSHAKE_FAILURE);
911 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
912 kssl_err.reason);
913 goto err;
914 }
915
916 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
917 ** in place of RFC 2712 KerberosWrapper, as in:
918 **
919 ** Send ticket (copy to *p, set n = length)
920 ** n = krb5_ap_req.length;
921 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
922 ** if (krb5_ap_req.data)
923 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
924 **
925 ** Now using real RFC 2712 KerberosWrapper
926 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
927 ** Note: 2712 "opaque" types are here replaced
928 ** with a 2-byte length followed by the value.
929 ** Example:
930 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
931 ** Where "xx xx" = length bytes. Shown here with
932 ** optional authenticator omitted.
933 */
934
935 /* KerberosWrapper.Ticket */
936 s2n(enc_ticket->length,p);
937 memcpy(p, enc_ticket->data, enc_ticket->length);
938 p+= enc_ticket->length;
939 n = enc_ticket->length + 2;
940
941 /* KerberosWrapper.Authenticator */
942 if (authp && authp->length)
943 {
944 s2n(authp->length,p);
945 memcpy(p, authp->data, authp->length);
946 p+= authp->length;
947 n+= authp->length + 2;
948
949 free(authp->data);
950 authp->data = NULL;
951 authp->length = 0;
952 }
953 else
954 {
955 s2n(0,p);/* null authenticator length */
956 n+=2;
957 }
958
959 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
960 goto err;
961
962 /* 20010420 VRS. Tried it this way; failed.
963 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
964 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
965 ** kssl_ctx->length);
966 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
967 */
968
969 memset(iv, 0, sizeof iv); /* per RFC 1510 */
970 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
971 kssl_ctx->key,iv);
972 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
973 sizeof tmp_buf);
974 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
975 outl += padl;
976 if (outl > (int)sizeof epms)
977 {
978 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
979 goto err;
980 }
981 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
982
983 /* KerberosWrapper.EncryptedPreMasterSecret */
984 s2n(outl,p);
985 memcpy(p, epms, outl);
986 p+=outl;
987 n+=outl + 2;
988
989 s->session->master_key_length=
990 s->method->ssl3_enc->generate_master_secret(s,
991 s->session->master_key,
992 tmp_buf, sizeof tmp_buf);
993
994 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
995 OPENSSL_cleanse(epms, outl);
996 }
997 #endif
998 #ifndef OPENSSL_NO_DH
999 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1000 {
1001 DH *dh_srvr,*dh_clnt;
1002
1003 if (s->session->sess_cert->peer_dh_tmp != NULL)
1004 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1005 else
1006 {
1007 /* we get them from the cert */
1008 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1009 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1010 goto err;
1011 }
1012
1013 /* generate a new random key */
1014 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1015 {
1016 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1017 goto err;
1018 }
1019 if (!DH_generate_key(dh_clnt))
1020 {
1021 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1022 goto err;
1023 }
1024
1025 /* use the 'p' output buffer for the DH key, but
1026 * make sure to clear it out afterwards */
1027
1028 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1029
1030 if (n <= 0)
1031 {
1032 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1033 goto err;
1034 }
1035
1036 /* generate master key from the result */
1037 s->session->master_key_length=
1038 s->method->ssl3_enc->generate_master_secret(s,
1039 s->session->master_key,p,n);
1040 /* clean up */
1041 memset(p,0,n);
1042
1043 /* send off the data */
1044 n=BN_num_bytes(dh_clnt->pub_key);
1045 s2n(n,p);
1046 BN_bn2bin(dh_clnt->pub_key,p);
1047 n+=2;
1048
1049 DH_free(dh_clnt);
1050
1051 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1052 }
1053 #endif
1054 #ifndef OPENSSL_NO_ECDH
1055 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1056 {
1057 const EC_GROUP *srvr_group = NULL;
1058 EC_KEY *tkey;
1059 int ecdh_clnt_cert = 0;
1060 int field_size = 0;
1061
1062 /* Did we send out the client's
1063 * ECDH share for use in premaster
1064 * computation as part of client certificate?
1065 * If so, set ecdh_clnt_cert to 1.
1066 */
1067 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1068 {
1069 /* XXX: For now, we do not support client
1070 * authentication using ECDH certificates.
1071 * To add such support, one needs to add
1072 * code that checks for appropriate
1073 * conditions and sets ecdh_clnt_cert to 1.
1074 * For example, the cert have an ECC
1075 * key on the same curve as the server's
1076 * and the key should be authorized for
1077 * key agreement.
1078 *
1079 * One also needs to add code in ssl3_connect
1080 * to skip sending the certificate verify
1081 * message.
1082 *
1083 * if ((s->cert->key->privatekey != NULL) &&
1084 * (s->cert->key->privatekey->type ==
1085 * EVP_PKEY_EC) && ...)
1086 * ecdh_clnt_cert = 1;
1087 */
1088 }
1089
1090 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1091 {
1092 tkey = s->session->sess_cert->peer_ecdh_tmp;
1093 }
1094 else
1095 {
1096 /* Get the Server Public Key from Cert */
1097 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1098 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1099 if ((srvr_pub_pkey == NULL) ||
1100 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1101 (srvr_pub_pkey->pkey.ec == NULL))
1102 {
1103 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1104 ERR_R_INTERNAL_ERROR);
1105 goto err;
1106 }
1107
1108 tkey = srvr_pub_pkey->pkey.ec;
1109 }
1110
1111 srvr_group = EC_KEY_get0_group(tkey);
1112 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1113
1114 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1115 {
1116 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1117 ERR_R_INTERNAL_ERROR);
1118 goto err;
1119 }
1120
1121 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1122 {
1123 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1124 goto err;
1125 }
1126
1127 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1128 {
1129 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1130 goto err;
1131 }
1132 if (ecdh_clnt_cert)
1133 {
1134 /* Reuse key info from our certificate
1135 * We only need our private key to perform
1136 * the ECDH computation.
1137 */
1138 const BIGNUM *priv_key;
1139 tkey = s->cert->key->privatekey->pkey.ec;
1140 priv_key = EC_KEY_get0_private_key(tkey);
1141 if (priv_key == NULL)
1142 {
1143 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1144 goto err;
1145 }
1146 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1147 {
1148 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1149 goto err;
1150 }
1151 }
1152 else
1153 {
1154 /* Generate a new ECDH key pair */
1155 if (!(EC_KEY_generate_key(clnt_ecdh)))
1156 {
1157 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1158 goto err;
1159 }
1160 }
1161
1162 /* use the 'p' output buffer for the ECDH key, but
1163 * make sure to clear it out afterwards
1164 */
1165
1166 field_size = EC_GROUP_get_degree(srvr_group);
1167 if (field_size <= 0)
1168 {
1169 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1170 ERR_R_ECDH_LIB);
1171 goto err;
1172 }
1173 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1174 if (n <= 0)
1175 {
1176 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1177 ERR_R_ECDH_LIB);
1178 goto err;
1179 }
1180
1181 /* generate master key from the result */
1182 s->session->master_key_length = s->method->ssl3_enc \
1183 -> generate_master_secret(s,
1184 s->session->master_key,
1185 p, n);
1186
1187 memset(p, 0, n); /* clean up */
1188
1189 if (ecdh_clnt_cert)
1190 {
1191 /* Send empty client key exch message */
1192 n = 0;
1193 }
1194 else
1195 {
1196 /* First check the size of encoding and
1197 * allocate memory accordingly.
1198 */
1199 encoded_pt_len =
1200 EC_POINT_point2oct(srvr_group,
1201 EC_KEY_get0_public_key(clnt_ecdh),
1202 POINT_CONVERSION_UNCOMPRESSED,
1203 NULL, 0, NULL);
1204
1205 encodedPoint = (unsigned char *)
1206 OPENSSL_malloc(encoded_pt_len *
1207 sizeof(unsigned char));
1208 bn_ctx = BN_CTX_new();
1209 if ((encodedPoint == NULL) ||
1210 (bn_ctx == NULL))
1211 {
1212 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1213 goto err;
1214 }
1215
1216 /* Encode the public key */
1217 n = EC_POINT_point2oct(srvr_group,
1218 EC_KEY_get0_public_key(clnt_ecdh),
1219 POINT_CONVERSION_UNCOMPRESSED,
1220 encodedPoint, encoded_pt_len, bn_ctx);
1221
1222 *p = n; /* length of encoded point */
1223 /* Encoded point will be copied here */
1224 p += 1;
1225 /* copy the point */
1226 memcpy((unsigned char *)p, encodedPoint, n);
1227 /* increment n to account for length field */
1228 n += 1;
1229 }
1230
1231 /* Free allocated memory */
1232 BN_CTX_free(bn_ctx);
1233 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1234 if (clnt_ecdh != NULL)
1235 EC_KEY_free(clnt_ecdh);
1236 EVP_PKEY_free(srvr_pub_pkey);
1237 }
1238 #endif /* !OPENSSL_NO_ECDH */
1239
1240 #ifndef OPENSSL_NO_PSK
1241 else if (alg_k & SSL_kPSK)
1242 {
1243 char identity[PSK_MAX_IDENTITY_LEN];
1244 unsigned char *t = NULL;
1245 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1246 unsigned int pre_ms_len = 0, psk_len = 0;
1247 int psk_err = 1;
1248
1249 n = 0;
1250 if (s->psk_client_callback == NULL)
1251 {
1252 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1253 SSL_R_PSK_NO_CLIENT_CB);
1254 goto err;
1255 }
1256
1257 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1258 identity, PSK_MAX_IDENTITY_LEN,
1259 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1260 if (psk_len > PSK_MAX_PSK_LEN)
1261 {
1262 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1263 ERR_R_INTERNAL_ERROR);
1264 goto psk_err;
1265 }
1266 else if (psk_len == 0)
1267 {
1268 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1269 SSL_R_PSK_IDENTITY_NOT_FOUND);
1270 goto psk_err;
1271 }
1272
1273 /* create PSK pre_master_secret */
1274 pre_ms_len = 2+psk_len+2+psk_len;
1275 t = psk_or_pre_ms;
1276 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1277 s2n(psk_len, t);
1278 memset(t, 0, psk_len);
1279 t+=psk_len;
1280 s2n(psk_len, t);
1281
1282 if (s->session->psk_identity_hint != NULL)
1283 OPENSSL_free(s->session->psk_identity_hint);
1284 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1285 if (s->ctx->psk_identity_hint != NULL &&
1286 s->session->psk_identity_hint == NULL)
1287 {
1288 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1289 ERR_R_MALLOC_FAILURE);
1290 goto psk_err;
1291 }
1292
1293 if (s->session->psk_identity != NULL)
1294 OPENSSL_free(s->session->psk_identity);
1295 s->session->psk_identity = BUF_strdup(identity);
1296 if (s->session->psk_identity == NULL)
1297 {
1298 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1299 ERR_R_MALLOC_FAILURE);
1300 goto psk_err;
1301 }
1302
1303 s->session->master_key_length =
1304 s->method->ssl3_enc->generate_master_secret(s,
1305 s->session->master_key,
1306 psk_or_pre_ms, pre_ms_len);
1307 n = strlen(identity);
1308 s2n(n, p);
1309 memcpy(p, identity, n);
1310 n+=2;
1311 psk_err = 0;
1312 psk_err:
1313 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1314 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1315 if (psk_err != 0)
1316 {
1317 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1318 goto err;
1319 }
1320 }
1321 #endif
1322 else
1323 {
1324 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1325 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1326 goto err;
1327 }
1328
1329 d = dtls1_set_message_header(s, d,
1330 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1331 /*
1332 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1333 l2n3(n,d);
1334 l2n(s->d1->handshake_write_seq,d);
1335 s->d1->handshake_write_seq++;
1336 */
1337
1338 s->state=SSL3_ST_CW_KEY_EXCH_B;
1339 /* number of bytes to write */
1340 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1341 s->init_off=0;
1342
1343 /* buffer the message to handle re-xmits */
1344 dtls1_buffer_message(s, 0);
1345 }
1346
1347 /* SSL3_ST_CW_KEY_EXCH_B */
1348 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1349 err:
1350 #ifndef OPENSSL_NO_ECDH
1351 BN_CTX_free(bn_ctx);
1352 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1353 if (clnt_ecdh != NULL)
1354 EC_KEY_free(clnt_ecdh);
1355 EVP_PKEY_free(srvr_pub_pkey);
1356 #endif
1357 return(-1);
1358 }
1359
1360 int dtls1_send_client_verify(SSL *s)
1361 {
1362 unsigned char *p,*d;
1363 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1364 EVP_PKEY *pkey;
1365 #ifndef OPENSSL_NO_RSA
1366 unsigned u=0;
1367 #endif
1368 unsigned long n;
1369 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1370 int j;
1371 #endif
1372
1373 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1374 {
1375 d=(unsigned char *)s->init_buf->data;
1376 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1377 pkey=s->cert->key->privatekey;
1378
1379 s->method->ssl3_enc->cert_verify_mac(s,
1380 NID_sha1,
1381 &(data[MD5_DIGEST_LENGTH]));
1382
1383 #ifndef OPENSSL_NO_RSA
1384 if (pkey->type == EVP_PKEY_RSA)
1385 {
1386 s->method->ssl3_enc->cert_verify_mac(s,
1387 NID_md5,
1388 &(data[0]));
1389 if (RSA_sign(NID_md5_sha1, data,
1390 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1391 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1392 {
1393 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1394 goto err;
1395 }
1396 s2n(u,p);
1397 n=u+2;
1398 }
1399 else
1400 #endif
1401 #ifndef OPENSSL_NO_DSA
1402 if (pkey->type == EVP_PKEY_DSA)
1403 {
1404 if (!DSA_sign(pkey->save_type,
1405 &(data[MD5_DIGEST_LENGTH]),
1406 SHA_DIGEST_LENGTH,&(p[2]),
1407 (unsigned int *)&j,pkey->pkey.dsa))
1408 {
1409 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1410 goto err;
1411 }
1412 s2n(j,p);
1413 n=j+2;
1414 }
1415 else
1416 #endif
1417 #ifndef OPENSSL_NO_ECDSA
1418 if (pkey->type == EVP_PKEY_EC)
1419 {
1420 if (!ECDSA_sign(pkey->save_type,
1421 &(data[MD5_DIGEST_LENGTH]),
1422 SHA_DIGEST_LENGTH,&(p[2]),
1423 (unsigned int *)&j,pkey->pkey.ec))
1424 {
1425 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1426 ERR_R_ECDSA_LIB);
1427 goto err;
1428 }
1429 s2n(j,p);
1430 n=j+2;
1431 }
1432 else
1433 #endif
1434 {
1435 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1436 goto err;
1437 }
1438
1439 d = dtls1_set_message_header(s, d,
1440 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1441
1442 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1443 s->init_off=0;
1444
1445 /* buffer the message to handle re-xmits */
1446 dtls1_buffer_message(s, 0);
1447
1448 s->state = SSL3_ST_CW_CERT_VRFY_B;
1449 }
1450
1451 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1452 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1453 err:
1454 return(-1);
1455 }
1456
1457 int dtls1_send_client_certificate(SSL *s)
1458 {
1459 X509 *x509=NULL;
1460 EVP_PKEY *pkey=NULL;
1461 int i;
1462 unsigned long l;
1463
1464 if (s->state == SSL3_ST_CW_CERT_A)
1465 {
1466 if ((s->cert == NULL) ||
1467 (s->cert->key->x509 == NULL) ||
1468 (s->cert->key->privatekey == NULL))
1469 s->state=SSL3_ST_CW_CERT_B;
1470 else
1471 s->state=SSL3_ST_CW_CERT_C;
1472 }
1473
1474 /* We need to get a client cert */
1475 if (s->state == SSL3_ST_CW_CERT_B)
1476 {
1477 /* If we get an error, we need to
1478 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1479 * We then get retied later */
1480 i=0;
1481 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1482 if (i < 0)
1483 {
1484 s->rwstate=SSL_X509_LOOKUP;
1485 return(-1);
1486 }
1487 s->rwstate=SSL_NOTHING;
1488 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1489 {
1490 s->state=SSL3_ST_CW_CERT_B;
1491 if ( !SSL_use_certificate(s,x509) ||
1492 !SSL_use_PrivateKey(s,pkey))
1493 i=0;
1494 }
1495 else if (i == 1)
1496 {
1497 i=0;
1498 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1499 }
1500
1501 if (x509 != NULL) X509_free(x509);
1502 if (pkey != NULL) EVP_PKEY_free(pkey);
1503 if (i == 0)
1504 {
1505 if (s->version == SSL3_VERSION)
1506 {
1507 s->s3->tmp.cert_req=0;
1508 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1509 return(1);
1510 }
1511 else
1512 {
1513 s->s3->tmp.cert_req=2;
1514 }
1515 }
1516
1517 /* Ok, we have a cert */
1518 s->state=SSL3_ST_CW_CERT_C;
1519 }
1520
1521 if (s->state == SSL3_ST_CW_CERT_C)
1522 {
1523 s->state=SSL3_ST_CW_CERT_D;
1524 l=dtls1_output_cert_chain(s,
1525 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1526 s->init_num=(int)l;
1527 s->init_off=0;
1528
1529 /* set header called by dtls1_output_cert_chain() */
1530
1531 /* buffer the message to handle re-xmits */
1532 dtls1_buffer_message(s, 0);
1533 }
1534 /* SSL3_ST_CW_CERT_D */
1535 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1536 }
1537
1538
NetBSD on the FriendlyARM MINI2440