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-rw-r--r--src/lib/libssl/d1_clnt.c1536
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diff --git a/src/lib/libssl/d1_clnt.c b/src/lib/libssl/d1_clnt.c
deleted file mode 100644
index 089fa4c7f8..0000000000
--- a/src/lib/libssl/d1_clnt.c
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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
155 RAND_add(&Time,sizeof(Time),0);
156 ERR_clear_error();
157 clear_sys_error();
158
159 if (s->info_callback != NULL)
160 cb=s->info_callback;
161 else if (s->ctx->info_callback != NULL)
162 cb=s->ctx->info_callback;
163
164 s->in_handshake++;
165 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
166
167 for (;;)
168 {
169 state=s->state;
170
171 switch(s->state)
172 {
173 case SSL_ST_RENEGOTIATE:
174 s->new_session=1;
175 s->state=SSL_ST_CONNECT;
176 s->ctx->stats.sess_connect_renegotiate++;
177 /* break */
178 case SSL_ST_BEFORE:
179 case SSL_ST_CONNECT:
180 case SSL_ST_BEFORE|SSL_ST_CONNECT:
181 case SSL_ST_OK|SSL_ST_CONNECT:
182
183 s->server=0;
184 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
185
186 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
187 (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
188 {
189 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
190 ret = -1;
191 goto end;
192 }
193
194 /* s->version=SSL3_VERSION; */
195 s->type=SSL_ST_CONNECT;
196
197 if (s->init_buf == NULL)
198 {
199 if ((buf=BUF_MEM_new()) == NULL)
200 {
201 ret= -1;
202 goto end;
203 }
204 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
205 {
206 ret= -1;
207 goto end;
208 }
209 s->init_buf=buf;
210 buf=NULL;
211 }
212
213 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
214
215 /* setup buffing BIO */
216 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
217
218 /* don't push the buffering BIO quite yet */
219
220 s->state=SSL3_ST_CW_CLNT_HELLO_A;
221 s->ctx->stats.sess_connect++;
222 s->init_num=0;
223 /* mark client_random uninitialized */
224 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
225 s->d1->send_cookie = 0;
226 s->hit = 0;
227 break;
228
229 case SSL3_ST_CW_CLNT_HELLO_A:
230 case SSL3_ST_CW_CLNT_HELLO_B:
231
232 s->shutdown=0;
233
234 /* every DTLS ClientHello resets Finished MAC */
235 ssl3_init_finished_mac(s);
236
237 dtls1_start_timer(s);
238 ret=dtls1_client_hello(s);
239 if (ret <= 0) goto end;
240
241 if ( s->d1->send_cookie)
242 {
243 s->state=SSL3_ST_CW_FLUSH;
244 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
245 }
246 else
247 s->state=SSL3_ST_CR_SRVR_HELLO_A;
248
249 s->init_num=0;
250
251 /* turn on buffering for the next lot of output */
252 if (s->bbio != s->wbio)
253 s->wbio=BIO_push(s->bbio,s->wbio);
254
255 break;
256
257 case SSL3_ST_CR_SRVR_HELLO_A:
258 case SSL3_ST_CR_SRVR_HELLO_B:
259 ret=ssl3_get_server_hello(s);
260 if (ret <= 0) goto end;
261 else
262 {
263 dtls1_stop_timer(s);
264 if (s->hit)
265 s->state=SSL3_ST_CR_FINISHED_A;
266 else
267 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
268 }
269 s->init_num=0;
270 break;
271
272 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
273 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
274
275 ret = dtls1_get_hello_verify(s);
276 if ( ret <= 0)
277 goto end;
278 dtls1_stop_timer(s);
279 if ( s->d1->send_cookie) /* start again, with a cookie */
280 s->state=SSL3_ST_CW_CLNT_HELLO_A;
281 else
282 s->state = SSL3_ST_CR_CERT_A;
283 s->init_num = 0;
284 break;
285
286 case SSL3_ST_CR_CERT_A:
287 case SSL3_ST_CR_CERT_B:
288#ifndef OPENSSL_NO_TLSEXT
289 ret=ssl3_check_finished(s);
290 if (ret <= 0) goto end;
291 if (ret == 2)
292 {
293 s->hit = 1;
294 if (s->tlsext_ticket_expected)
295 s->state=SSL3_ST_CR_SESSION_TICKET_A;
296 else
297 s->state=SSL3_ST_CR_FINISHED_A;
298 s->init_num=0;
299 break;
300 }
301#endif
302 /* Check if it is anon DH or PSK */
303 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
304 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
305 {
306 ret=ssl3_get_server_certificate(s);
307 if (ret <= 0) goto end;
308#ifndef OPENSSL_NO_TLSEXT
309 if (s->tlsext_status_expected)
310 s->state=SSL3_ST_CR_CERT_STATUS_A;
311 else
312 s->state=SSL3_ST_CR_KEY_EXCH_A;
313 }
314 else
315 {
316 skip = 1;
317 s->state=SSL3_ST_CR_KEY_EXCH_A;
318 }
319#else
320 }
321 else
322 skip=1;
323
324 s->state=SSL3_ST_CR_KEY_EXCH_A;
325#endif
326 s->init_num=0;
327 break;
328
329 case SSL3_ST_CR_KEY_EXCH_A:
330 case SSL3_ST_CR_KEY_EXCH_B:
331 ret=ssl3_get_key_exchange(s);
332 if (ret <= 0) goto end;
333 s->state=SSL3_ST_CR_CERT_REQ_A;
334 s->init_num=0;
335
336 /* at this point we check that we have the
337 * required stuff from the server */
338 if (!ssl3_check_cert_and_algorithm(s))
339 {
340 ret= -1;
341 goto end;
342 }
343 break;
344
345 case SSL3_ST_CR_CERT_REQ_A:
346 case SSL3_ST_CR_CERT_REQ_B:
347 ret=ssl3_get_certificate_request(s);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CR_SRVR_DONE_A;
350 s->init_num=0;
351 break;
352
353 case SSL3_ST_CR_SRVR_DONE_A:
354 case SSL3_ST_CR_SRVR_DONE_B:
355 ret=ssl3_get_server_done(s);
356 if (ret <= 0) goto end;
357 if (s->s3->tmp.cert_req)
358 s->state=SSL3_ST_CW_CERT_A;
359 else
360 s->state=SSL3_ST_CW_KEY_EXCH_A;
361 s->init_num=0;
362
363 break;
364
365 case SSL3_ST_CW_CERT_A:
366 case SSL3_ST_CW_CERT_B:
367 case SSL3_ST_CW_CERT_C:
368 case SSL3_ST_CW_CERT_D:
369 dtls1_start_timer(s);
370 ret=dtls1_send_client_certificate(s);
371 if (ret <= 0) goto end;
372 s->state=SSL3_ST_CW_KEY_EXCH_A;
373 s->init_num=0;
374 break;
375
376 case SSL3_ST_CW_KEY_EXCH_A:
377 case SSL3_ST_CW_KEY_EXCH_B:
378 dtls1_start_timer(s);
379 ret=dtls1_send_client_key_exchange(s);
380 if (ret <= 0) goto end;
381 /* EAY EAY EAY need to check for DH fix cert
382 * sent back */
383 /* For TLS, cert_req is set to 2, so a cert chain
384 * of nothing is sent, but no verify packet is sent */
385 if (s->s3->tmp.cert_req == 1)
386 {
387 s->state=SSL3_ST_CW_CERT_VRFY_A;
388 }
389 else
390 {
391 s->state=SSL3_ST_CW_CHANGE_A;
392 s->s3->change_cipher_spec=0;
393 }
394
395 s->init_num=0;
396 break;
397
398 case SSL3_ST_CW_CERT_VRFY_A:
399 case SSL3_ST_CW_CERT_VRFY_B:
400 dtls1_start_timer(s);
401 ret=dtls1_send_client_verify(s);
402 if (ret <= 0) goto end;
403 s->state=SSL3_ST_CW_CHANGE_A;
404 s->init_num=0;
405 s->s3->change_cipher_spec=0;
406 break;
407
408 case SSL3_ST_CW_CHANGE_A:
409 case SSL3_ST_CW_CHANGE_B:
410 if (!s->hit)
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 if (!s->hit)
447 dtls1_start_timer(s);
448 ret=dtls1_send_finished(s,
449 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
450 s->method->ssl3_enc->client_finished_label,
451 s->method->ssl3_enc->client_finished_label_len);
452 if (ret <= 0) goto end;
453 s->state=SSL3_ST_CW_FLUSH;
454
455 /* clear flags */
456 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
457 if (s->hit)
458 {
459 s->s3->tmp.next_state=SSL_ST_OK;
460 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
461 {
462 s->state=SSL_ST_OK;
463 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
464 s->s3->delay_buf_pop_ret=0;
465 }
466 }
467 else
468 {
469#ifndef OPENSSL_NO_TLSEXT
470 /* Allow NewSessionTicket if ticket expected */
471 if (s->tlsext_ticket_expected)
472 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
473 else
474#endif
475
476 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
477 }
478 s->init_num=0;
479 break;
480
481#ifndef OPENSSL_NO_TLSEXT
482 case SSL3_ST_CR_SESSION_TICKET_A:
483 case SSL3_ST_CR_SESSION_TICKET_B:
484 ret=ssl3_get_new_session_ticket(s);
485 if (ret <= 0) goto end;
486 s->state=SSL3_ST_CR_FINISHED_A;
487 s->init_num=0;
488 break;
489
490 case SSL3_ST_CR_CERT_STATUS_A:
491 case SSL3_ST_CR_CERT_STATUS_B:
492 ret=ssl3_get_cert_status(s);
493 if (ret <= 0) goto end;
494 s->state=SSL3_ST_CR_KEY_EXCH_A;
495 s->init_num=0;
496 break;
497#endif
498
499 case SSL3_ST_CR_FINISHED_A:
500 case SSL3_ST_CR_FINISHED_B:
501 s->d1->change_cipher_spec_ok = 1;
502 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
503 SSL3_ST_CR_FINISHED_B);
504 if (ret <= 0) goto end;
505 dtls1_stop_timer(s);
506
507 if (s->hit)
508 s->state=SSL3_ST_CW_CHANGE_A;
509 else
510 s->state=SSL_ST_OK;
511 s->init_num=0;
512 break;
513
514 case SSL3_ST_CW_FLUSH:
515 s->rwstate=SSL_WRITING;
516 if (BIO_flush(s->wbio) <= 0)
517 {
518 ret= -1;
519 goto end;
520 }
521 s->rwstate=SSL_NOTHING;
522 s->state=s->s3->tmp.next_state;
523 break;
524
525 case SSL_ST_OK:
526 /* clean a few things up */
527 ssl3_cleanup_key_block(s);
528
529#if 0
530 if (s->init_buf != NULL)
531 {
532 BUF_MEM_free(s->init_buf);
533 s->init_buf=NULL;
534 }
535#endif
536
537 /* If we are not 'joining' the last two packets,
538 * remove the buffering now */
539 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
540 ssl_free_wbio_buffer(s);
541 /* else do it later in ssl3_write */
542
543 s->init_num=0;
544 s->new_session=0;
545
546 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
547 if (s->hit) s->ctx->stats.sess_hit++;
548
549 ret=1;
550 /* s->server=0; */
551 s->handshake_func=dtls1_connect;
552 s->ctx->stats.sess_connect_good++;
553
554 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
555
556 /* done with handshaking */
557 s->d1->handshake_read_seq = 0;
558 s->d1->next_handshake_write_seq = 0;
559 goto end;
560 /* break; */
561
562 default:
563 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
564 ret= -1;
565 goto end;
566 /* break; */
567 }
568
569 /* did we do anything */
570 if (!s->s3->tmp.reuse_message && !skip)
571 {
572 if (s->debug)
573 {
574 if ((ret=BIO_flush(s->wbio)) <= 0)
575 goto end;
576 }
577
578 if ((cb != NULL) && (s->state != state))
579 {
580 new_state=s->state;
581 s->state=state;
582 cb(s,SSL_CB_CONNECT_LOOP,1);
583 s->state=new_state;
584 }
585 }
586 skip=0;
587 }
588end:
589 s->in_handshake--;
590 if (buf != NULL)
591 BUF_MEM_free(buf);
592 if (cb != NULL)
593 cb(s,SSL_CB_CONNECT_EXIT,ret);
594 return(ret);
595 }
596
597int dtls1_client_hello(SSL *s)
598 {
599 unsigned char *buf;
600 unsigned char *p,*d;
601 unsigned int i,j;
602 unsigned long Time,l;
603 SSL_COMP *comp;
604
605 buf=(unsigned char *)s->init_buf->data;
606 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
607 {
608 SSL_SESSION *sess = s->session;
609 if ((s->session == NULL) ||
610 (s->session->ssl_version != s->version) ||
611#ifdef OPENSSL_NO_TLSEXT
612 !sess->session_id_length ||
613#else
614 (!sess->session_id_length && !sess->tlsext_tick) ||
615#endif
616 (s->session->not_resumable))
617 {
618 if (!ssl_get_new_session(s,0))
619 goto err;
620 }
621 /* else use the pre-loaded session */
622
623 p=s->s3->client_random;
624
625 /* if client_random is initialized, reuse it, we are
626 * required to use same upon reply to HelloVerify */
627 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
628 if (i==sizeof(s->s3->client_random))
629 {
630 Time=(unsigned long)time(NULL); /* Time */
631 l2n(Time,p);
632 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
633 }
634
635 /* Do the message type and length last */
636 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
637
638 *(p++)=s->version>>8;
639 *(p++)=s->version&0xff;
640 s->client_version=s->version;
641
642 /* Random stuff */
643 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
644 p+=SSL3_RANDOM_SIZE;
645
646 /* Session ID */
647 if (s->new_session)
648 i=0;
649 else
650 i=s->session->session_id_length;
651 *(p++)=i;
652 if (i != 0)
653 {
654 if (i > sizeof s->session->session_id)
655 {
656 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
657 goto err;
658 }
659 memcpy(p,s->session->session_id,i);
660 p+=i;
661 }
662
663 /* cookie stuff */
664 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
665 {
666 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
667 goto err;
668 }
669 *(p++) = s->d1->cookie_len;
670 memcpy(p, s->d1->cookie, s->d1->cookie_len);
671 p += s->d1->cookie_len;
672
673 /* Ciphers supported */
674 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
675 if (i == 0)
676 {
677 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
678 goto err;
679 }
680 s2n(i,p);
681 p+=i;
682
683 /* COMPRESSION */
684 if (s->ctx->comp_methods == NULL)
685 j=0;
686 else
687 j=sk_SSL_COMP_num(s->ctx->comp_methods);
688 *(p++)=1+j;
689 for (i=0; i<j; i++)
690 {
691 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
692 *(p++)=comp->id;
693 }
694 *(p++)=0; /* Add the NULL method */
695
696#ifndef OPENSSL_NO_TLSEXT
697 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
698 {
699 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
700 goto err;
701 }
702#endif
703
704 l=(p-d);
705 d=buf;
706
707 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
708
709 s->state=SSL3_ST_CW_CLNT_HELLO_B;
710 /* number of bytes to write */
711 s->init_num=p-buf;
712 s->init_off=0;
713
714 /* buffer the message to handle re-xmits */
715 dtls1_buffer_message(s, 0);
716 }
717
718 /* SSL3_ST_CW_CLNT_HELLO_B */
719 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
720err:
721 return(-1);
722 }
723
724static int dtls1_get_hello_verify(SSL *s)
725 {
726 int n, al, ok = 0;
727 unsigned char *data;
728 unsigned int cookie_len;
729
730 n=s->method->ssl_get_message(s,
731 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
732 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
733 -1,
734 s->max_cert_list,
735 &ok);
736
737 if (!ok) return((int)n);
738
739 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
740 {
741 s->d1->send_cookie = 0;
742 s->s3->tmp.reuse_message=1;
743 return(1);
744 }
745
746 data = (unsigned char *)s->init_msg;
747
748 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
749 {
750 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
751 s->version=(s->version&0xff00)|data[1];
752 al = SSL_AD_PROTOCOL_VERSION;
753 goto f_err;
754 }
755 data+=2;
756
757 cookie_len = *(data++);
758 if ( cookie_len > sizeof(s->d1->cookie))
759 {
760 al=SSL_AD_ILLEGAL_PARAMETER;
761 goto f_err;
762 }
763
764 memcpy(s->d1->cookie, data, cookie_len);
765 s->d1->cookie_len = cookie_len;
766
767 s->d1->send_cookie = 1;
768 return 1;
769
770f_err:
771 ssl3_send_alert(s, SSL3_AL_FATAL, al);
772 return -1;
773 }
774
775int dtls1_send_client_key_exchange(SSL *s)
776 {
777 unsigned char *p,*d;
778 int n;
779 unsigned long alg_k;
780#ifndef OPENSSL_NO_RSA
781 unsigned char *q;
782 EVP_PKEY *pkey=NULL;
783#endif
784#ifndef OPENSSL_NO_KRB5
785 KSSL_ERR kssl_err;
786#endif /* OPENSSL_NO_KRB5 */
787#ifndef OPENSSL_NO_ECDH
788 EC_KEY *clnt_ecdh = NULL;
789 const EC_POINT *srvr_ecpoint = NULL;
790 EVP_PKEY *srvr_pub_pkey = NULL;
791 unsigned char *encodedPoint = NULL;
792 int encoded_pt_len = 0;
793 BN_CTX * bn_ctx = NULL;
794#endif
795
796 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
797 {
798 d=(unsigned char *)s->init_buf->data;
799 p= &(d[DTLS1_HM_HEADER_LENGTH]);
800
801 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
802
803 /* Fool emacs indentation */
804 if (0) {}
805#ifndef OPENSSL_NO_RSA
806 else if (alg_k & SSL_kRSA)
807 {
808 RSA *rsa;
809 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
810
811 if (s->session->sess_cert->peer_rsa_tmp != NULL)
812 rsa=s->session->sess_cert->peer_rsa_tmp;
813 else
814 {
815 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
816 if ((pkey == NULL) ||
817 (pkey->type != EVP_PKEY_RSA) ||
818 (pkey->pkey.rsa == NULL))
819 {
820 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
821 goto err;
822 }
823 rsa=pkey->pkey.rsa;
824 EVP_PKEY_free(pkey);
825 }
826
827 tmp_buf[0]=s->client_version>>8;
828 tmp_buf[1]=s->client_version&0xff;
829 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
830 goto err;
831
832 s->session->master_key_length=sizeof tmp_buf;
833
834 q=p;
835 /* Fix buf for TLS and [incidentally] DTLS */
836 if (s->version > SSL3_VERSION)
837 p+=2;
838 n=RSA_public_encrypt(sizeof tmp_buf,
839 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
840#ifdef PKCS1_CHECK
841 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
842 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
843#endif
844 if (n <= 0)
845 {
846 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
847 goto err;
848 }
849
850 /* Fix buf for TLS and [incidentally] DTLS */
851 if (s->version > SSL3_VERSION)
852 {
853 s2n(n,q);
854 n+=2;
855 }
856
857 s->session->master_key_length=
858 s->method->ssl3_enc->generate_master_secret(s,
859 s->session->master_key,
860 tmp_buf,sizeof tmp_buf);
861 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
862 }
863#endif
864#ifndef OPENSSL_NO_KRB5
865 else if (alg_k & SSL_kKRB5)
866 {
867 krb5_error_code krb5rc;
868 KSSL_CTX *kssl_ctx = s->kssl_ctx;
869 /* krb5_data krb5_ap_req; */
870 krb5_data *enc_ticket;
871 krb5_data authenticator, *authp = NULL;
872 EVP_CIPHER_CTX ciph_ctx;
873 const EVP_CIPHER *enc = NULL;
874 unsigned char iv[EVP_MAX_IV_LENGTH];
875 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
876 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
877 + EVP_MAX_IV_LENGTH];
878 int padl, outl = sizeof(epms);
879
880 EVP_CIPHER_CTX_init(&ciph_ctx);
881
882#ifdef KSSL_DEBUG
883 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
884 alg_k, SSL_kKRB5);
885#endif /* KSSL_DEBUG */
886
887 authp = NULL;
888#ifdef KRB5SENDAUTH
889 if (KRB5SENDAUTH) authp = &authenticator;
890#endif /* KRB5SENDAUTH */
891
892 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
893 &kssl_err);
894 enc = kssl_map_enc(kssl_ctx->enctype);
895 if (enc == NULL)
896 goto err;
897#ifdef KSSL_DEBUG
898 {
899 printf("kssl_cget_tkt rtn %d\n", krb5rc);
900 if (krb5rc && kssl_err.text)
901 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
902 }
903#endif /* KSSL_DEBUG */
904
905 if (krb5rc)
906 {
907 ssl3_send_alert(s,SSL3_AL_FATAL,
908 SSL_AD_HANDSHAKE_FAILURE);
909 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
910 kssl_err.reason);
911 goto err;
912 }
913
914 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
915 ** in place of RFC 2712 KerberosWrapper, as in:
916 **
917 ** Send ticket (copy to *p, set n = length)
918 ** n = krb5_ap_req.length;
919 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
920 ** if (krb5_ap_req.data)
921 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
922 **
923 ** Now using real RFC 2712 KerberosWrapper
924 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
925 ** Note: 2712 "opaque" types are here replaced
926 ** with a 2-byte length followed by the value.
927 ** Example:
928 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
929 ** Where "xx xx" = length bytes. Shown here with
930 ** optional authenticator omitted.
931 */
932
933 /* KerberosWrapper.Ticket */
934 s2n(enc_ticket->length,p);
935 memcpy(p, enc_ticket->data, enc_ticket->length);
936 p+= enc_ticket->length;
937 n = enc_ticket->length + 2;
938
939 /* KerberosWrapper.Authenticator */
940 if (authp && authp->length)
941 {
942 s2n(authp->length,p);
943 memcpy(p, authp->data, authp->length);
944 p+= authp->length;
945 n+= authp->length + 2;
946
947 free(authp->data);
948 authp->data = NULL;
949 authp->length = 0;
950 }
951 else
952 {
953 s2n(0,p);/* null authenticator length */
954 n+=2;
955 }
956
957 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
958 goto err;
959
960 /* 20010420 VRS. Tried it this way; failed.
961 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
962 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
963 ** kssl_ctx->length);
964 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
965 */
966
967 memset(iv, 0, sizeof iv); /* per RFC 1510 */
968 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
969 kssl_ctx->key,iv);
970 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
971 sizeof tmp_buf);
972 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
973 outl += padl;
974 if (outl > (int)sizeof epms)
975 {
976 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
977 goto err;
978 }
979 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
980
981 /* KerberosWrapper.EncryptedPreMasterSecret */
982 s2n(outl,p);
983 memcpy(p, epms, outl);
984 p+=outl;
985 n+=outl + 2;
986
987 s->session->master_key_length=
988 s->method->ssl3_enc->generate_master_secret(s,
989 s->session->master_key,
990 tmp_buf, sizeof tmp_buf);
991
992 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
993 OPENSSL_cleanse(epms, outl);
994 }
995#endif
996#ifndef OPENSSL_NO_DH
997 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
998 {
999 DH *dh_srvr,*dh_clnt;
1000
1001 if (s->session->sess_cert->peer_dh_tmp != NULL)
1002 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1003 else
1004 {
1005 /* we get them from the cert */
1006 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1007 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1008 goto err;
1009 }
1010
1011 /* generate a new random key */
1012 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1013 {
1014 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1015 goto err;
1016 }
1017 if (!DH_generate_key(dh_clnt))
1018 {
1019 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1020 goto err;
1021 }
1022
1023 /* use the 'p' output buffer for the DH key, but
1024 * make sure to clear it out afterwards */
1025
1026 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1027
1028 if (n <= 0)
1029 {
1030 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1031 goto err;
1032 }
1033
1034 /* generate master key from the result */
1035 s->session->master_key_length=
1036 s->method->ssl3_enc->generate_master_secret(s,
1037 s->session->master_key,p,n);
1038 /* clean up */
1039 memset(p,0,n);
1040
1041 /* send off the data */
1042 n=BN_num_bytes(dh_clnt->pub_key);
1043 s2n(n,p);
1044 BN_bn2bin(dh_clnt->pub_key,p);
1045 n+=2;
1046
1047 DH_free(dh_clnt);
1048
1049 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1050 }
1051#endif
1052#ifndef OPENSSL_NO_ECDH
1053 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
1054 {
1055 const EC_GROUP *srvr_group = NULL;
1056 EC_KEY *tkey;
1057 int ecdh_clnt_cert = 0;
1058 int field_size = 0;
1059
1060 /* Did we send out the client's
1061 * ECDH share for use in premaster
1062 * computation as part of client certificate?
1063 * If so, set ecdh_clnt_cert to 1.
1064 */
1065 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
1066 {
1067 /* XXX: For now, we do not support client
1068 * authentication using ECDH certificates.
1069 * To add such support, one needs to add
1070 * code that checks for appropriate
1071 * conditions and sets ecdh_clnt_cert to 1.
1072 * For example, the cert have an ECC
1073 * key on the same curve as the server's
1074 * and the key should be authorized for
1075 * key agreement.
1076 *
1077 * One also needs to add code in ssl3_connect
1078 * to skip sending the certificate verify
1079 * message.
1080 *
1081 * if ((s->cert->key->privatekey != NULL) &&
1082 * (s->cert->key->privatekey->type ==
1083 * EVP_PKEY_EC) && ...)
1084 * ecdh_clnt_cert = 1;
1085 */
1086 }
1087
1088 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1089 {
1090 tkey = s->session->sess_cert->peer_ecdh_tmp;
1091 }
1092 else
1093 {
1094 /* Get the Server Public Key from Cert */
1095 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1096 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1097 if ((srvr_pub_pkey == NULL) ||
1098 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1099 (srvr_pub_pkey->pkey.ec == NULL))
1100 {
1101 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1102 ERR_R_INTERNAL_ERROR);
1103 goto err;
1104 }
1105
1106 tkey = srvr_pub_pkey->pkey.ec;
1107 }
1108
1109 srvr_group = EC_KEY_get0_group(tkey);
1110 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
1111
1112 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1113 {
1114 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1115 ERR_R_INTERNAL_ERROR);
1116 goto err;
1117 }
1118
1119 if ((clnt_ecdh=EC_KEY_new()) == NULL)
1120 {
1121 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1122 goto err;
1123 }
1124
1125 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
1126 {
1127 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1128 goto err;
1129 }
1130 if (ecdh_clnt_cert)
1131 {
1132 /* Reuse key info from our certificate
1133 * We only need our private key to perform
1134 * the ECDH computation.
1135 */
1136 const BIGNUM *priv_key;
1137 tkey = s->cert->key->privatekey->pkey.ec;
1138 priv_key = EC_KEY_get0_private_key(tkey);
1139 if (priv_key == NULL)
1140 {
1141 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1142 goto err;
1143 }
1144 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
1145 {
1146 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
1147 goto err;
1148 }
1149 }
1150 else
1151 {
1152 /* Generate a new ECDH key pair */
1153 if (!(EC_KEY_generate_key(clnt_ecdh)))
1154 {
1155 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1156 goto err;
1157 }
1158 }
1159
1160 /* use the 'p' output buffer for the ECDH key, but
1161 * make sure to clear it out afterwards
1162 */
1163
1164 field_size = EC_GROUP_get_degree(srvr_group);
1165 if (field_size <= 0)
1166 {
1167 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1168 ERR_R_ECDH_LIB);
1169 goto err;
1170 }
1171 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1172 if (n <= 0)
1173 {
1174 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1175 ERR_R_ECDH_LIB);
1176 goto err;
1177 }
1178
1179 /* generate master key from the result */
1180 s->session->master_key_length = s->method->ssl3_enc \
1181 -> generate_master_secret(s,
1182 s->session->master_key,
1183 p, n);
1184
1185 memset(p, 0, n); /* clean up */
1186
1187 if (ecdh_clnt_cert)
1188 {
1189 /* Send empty client key exch message */
1190 n = 0;
1191 }
1192 else
1193 {
1194 /* First check the size of encoding and
1195 * allocate memory accordingly.
1196 */
1197 encoded_pt_len =
1198 EC_POINT_point2oct(srvr_group,
1199 EC_KEY_get0_public_key(clnt_ecdh),
1200 POINT_CONVERSION_UNCOMPRESSED,
1201 NULL, 0, NULL);
1202
1203 encodedPoint = (unsigned char *)
1204 OPENSSL_malloc(encoded_pt_len *
1205 sizeof(unsigned char));
1206 bn_ctx = BN_CTX_new();
1207 if ((encodedPoint == NULL) ||
1208 (bn_ctx == NULL))
1209 {
1210 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1211 goto err;
1212 }
1213
1214 /* Encode the public key */
1215 n = EC_POINT_point2oct(srvr_group,
1216 EC_KEY_get0_public_key(clnt_ecdh),
1217 POINT_CONVERSION_UNCOMPRESSED,
1218 encodedPoint, encoded_pt_len, bn_ctx);
1219
1220 *p = n; /* length of encoded point */
1221 /* Encoded point will be copied here */
1222 p += 1;
1223 /* copy the point */
1224 memcpy((unsigned char *)p, encodedPoint, n);
1225 /* increment n to account for length field */
1226 n += 1;
1227 }
1228
1229 /* Free allocated memory */
1230 BN_CTX_free(bn_ctx);
1231 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1232 if (clnt_ecdh != NULL)
1233 EC_KEY_free(clnt_ecdh);
1234 EVP_PKEY_free(srvr_pub_pkey);
1235 }
1236#endif /* !OPENSSL_NO_ECDH */
1237
1238#ifndef OPENSSL_NO_PSK
1239 else if (alg_k & SSL_kPSK)
1240 {
1241 char identity[PSK_MAX_IDENTITY_LEN];
1242 unsigned char *t = NULL;
1243 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
1244 unsigned int pre_ms_len = 0, psk_len = 0;
1245 int psk_err = 1;
1246
1247 n = 0;
1248 if (s->psk_client_callback == NULL)
1249 {
1250 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1251 SSL_R_PSK_NO_CLIENT_CB);
1252 goto err;
1253 }
1254
1255 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
1256 identity, PSK_MAX_IDENTITY_LEN,
1257 psk_or_pre_ms, sizeof(psk_or_pre_ms));
1258 if (psk_len > PSK_MAX_PSK_LEN)
1259 {
1260 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1261 ERR_R_INTERNAL_ERROR);
1262 goto psk_err;
1263 }
1264 else if (psk_len == 0)
1265 {
1266 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1267 SSL_R_PSK_IDENTITY_NOT_FOUND);
1268 goto psk_err;
1269 }
1270
1271 /* create PSK pre_master_secret */
1272 pre_ms_len = 2+psk_len+2+psk_len;
1273 t = psk_or_pre_ms;
1274 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
1275 s2n(psk_len, t);
1276 memset(t, 0, psk_len);
1277 t+=psk_len;
1278 s2n(psk_len, t);
1279
1280 if (s->session->psk_identity_hint != NULL)
1281 OPENSSL_free(s->session->psk_identity_hint);
1282 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
1283 if (s->ctx->psk_identity_hint != NULL &&
1284 s->session->psk_identity_hint == NULL)
1285 {
1286 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1287 ERR_R_MALLOC_FAILURE);
1288 goto psk_err;
1289 }
1290
1291 if (s->session->psk_identity != NULL)
1292 OPENSSL_free(s->session->psk_identity);
1293 s->session->psk_identity = BUF_strdup(identity);
1294 if (s->session->psk_identity == NULL)
1295 {
1296 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
1297 ERR_R_MALLOC_FAILURE);
1298 goto psk_err;
1299 }
1300
1301 s->session->master_key_length =
1302 s->method->ssl3_enc->generate_master_secret(s,
1303 s->session->master_key,
1304 psk_or_pre_ms, pre_ms_len);
1305 n = strlen(identity);
1306 s2n(n, p);
1307 memcpy(p, identity, n);
1308 n+=2;
1309 psk_err = 0;
1310 psk_err:
1311 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
1312 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
1313 if (psk_err != 0)
1314 {
1315 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1316 goto err;
1317 }
1318 }
1319#endif
1320 else
1321 {
1322 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1323 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1324 goto err;
1325 }
1326
1327 d = dtls1_set_message_header(s, d,
1328 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
1329 /*
1330 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1331 l2n3(n,d);
1332 l2n(s->d1->handshake_write_seq,d);
1333 s->d1->handshake_write_seq++;
1334 */
1335
1336 s->state=SSL3_ST_CW_KEY_EXCH_B;
1337 /* number of bytes to write */
1338 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
1339 s->init_off=0;
1340
1341 /* buffer the message to handle re-xmits */
1342 dtls1_buffer_message(s, 0);
1343 }
1344
1345 /* SSL3_ST_CW_KEY_EXCH_B */
1346 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1347err:
1348#ifndef OPENSSL_NO_ECDH
1349 BN_CTX_free(bn_ctx);
1350 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1351 if (clnt_ecdh != NULL)
1352 EC_KEY_free(clnt_ecdh);
1353 EVP_PKEY_free(srvr_pub_pkey);
1354#endif
1355 return(-1);
1356 }
1357
1358int dtls1_send_client_verify(SSL *s)
1359 {
1360 unsigned char *p,*d;
1361 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1362 EVP_PKEY *pkey;
1363#ifndef OPENSSL_NO_RSA
1364 unsigned u=0;
1365#endif
1366 unsigned long n;
1367#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
1368 int j;
1369#endif
1370
1371 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1372 {
1373 d=(unsigned char *)s->init_buf->data;
1374 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1375 pkey=s->cert->key->privatekey;
1376
1377 s->method->ssl3_enc->cert_verify_mac(s,
1378 NID_sha1,
1379 &(data[MD5_DIGEST_LENGTH]));
1380
1381#ifndef OPENSSL_NO_RSA
1382 if (pkey->type == EVP_PKEY_RSA)
1383 {
1384 s->method->ssl3_enc->cert_verify_mac(s,
1385 NID_md5,
1386 &(data[0]));
1387 if (RSA_sign(NID_md5_sha1, data,
1388 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1389 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1390 {
1391 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1392 goto err;
1393 }
1394 s2n(u,p);
1395 n=u+2;
1396 }
1397 else
1398#endif
1399#ifndef OPENSSL_NO_DSA
1400 if (pkey->type == EVP_PKEY_DSA)
1401 {
1402 if (!DSA_sign(pkey->save_type,
1403 &(data[MD5_DIGEST_LENGTH]),
1404 SHA_DIGEST_LENGTH,&(p[2]),
1405 (unsigned int *)&j,pkey->pkey.dsa))
1406 {
1407 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1408 goto err;
1409 }
1410 s2n(j,p);
1411 n=j+2;
1412 }
1413 else
1414#endif
1415#ifndef OPENSSL_NO_ECDSA
1416 if (pkey->type == EVP_PKEY_EC)
1417 {
1418 if (!ECDSA_sign(pkey->save_type,
1419 &(data[MD5_DIGEST_LENGTH]),
1420 SHA_DIGEST_LENGTH,&(p[2]),
1421 (unsigned int *)&j,pkey->pkey.ec))
1422 {
1423 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,
1424 ERR_R_ECDSA_LIB);
1425 goto err;
1426 }
1427 s2n(j,p);
1428 n=j+2;
1429 }
1430 else
1431#endif
1432 {
1433 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1434 goto err;
1435 }
1436
1437 d = dtls1_set_message_header(s, d,
1438 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1439
1440 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1441 s->init_off=0;
1442
1443 /* buffer the message to handle re-xmits */
1444 dtls1_buffer_message(s, 0);
1445
1446 s->state = SSL3_ST_CW_CERT_VRFY_B;
1447 }
1448
1449 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1450 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1451err:
1452 return(-1);
1453 }
1454
1455int dtls1_send_client_certificate(SSL *s)
1456 {
1457 X509 *x509=NULL;
1458 EVP_PKEY *pkey=NULL;
1459 int i;
1460 unsigned long l;
1461
1462 if (s->state == SSL3_ST_CW_CERT_A)
1463 {
1464 if ((s->cert == NULL) ||
1465 (s->cert->key->x509 == NULL) ||
1466 (s->cert->key->privatekey == NULL))
1467 s->state=SSL3_ST_CW_CERT_B;
1468 else
1469 s->state=SSL3_ST_CW_CERT_C;
1470 }
1471
1472 /* We need to get a client cert */
1473 if (s->state == SSL3_ST_CW_CERT_B)
1474 {
1475 /* If we get an error, we need to
1476 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1477 * We then get retied later */
1478 i=0;
1479 i = ssl_do_client_cert_cb(s, &x509, &pkey);
1480 if (i < 0)
1481 {
1482 s->rwstate=SSL_X509_LOOKUP;
1483 return(-1);
1484 }
1485 s->rwstate=SSL_NOTHING;
1486 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1487 {
1488 s->state=SSL3_ST_CW_CERT_B;
1489 if ( !SSL_use_certificate(s,x509) ||
1490 !SSL_use_PrivateKey(s,pkey))
1491 i=0;
1492 }
1493 else if (i == 1)
1494 {
1495 i=0;
1496 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1497 }
1498
1499 if (x509 != NULL) X509_free(x509);
1500 if (pkey != NULL) EVP_PKEY_free(pkey);
1501 if (i == 0)
1502 {
1503 if (s->version == SSL3_VERSION)
1504 {
1505 s->s3->tmp.cert_req=0;
1506 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1507 return(1);
1508 }
1509 else
1510 {
1511 s->s3->tmp.cert_req=2;
1512 }
1513 }
1514
1515 /* Ok, we have a cert */
1516 s->state=SSL3_ST_CW_CERT_C;
1517 }
1518
1519 if (s->state == SSL3_ST_CW_CERT_C)
1520 {
1521 s->state=SSL3_ST_CW_CERT_D;
1522 l=dtls1_output_cert_chain(s,
1523 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1524 s->init_num=(int)l;
1525 s->init_off=0;
1526
1527 /* set header called by dtls1_output_cert_chain() */
1528
1529 /* buffer the message to handle re-xmits */
1530 dtls1_buffer_message(s, 0);
1531 }
1532 /* SSL3_ST_CW_CERT_D */
1533 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1534 }
1535
1536
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-19 22:06:27 +0000