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Import OpenSSL 0.9.8h.
[dragonfly.git] / crypto / openssl-0.9 / ssl / s3_clnt.c
blobf6864cdc50ad7c74ad4c7f2d290cb53e9bf0a8b8
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124
125 #include <stdio.h>
126 #include "ssl_locl.h"
127 #include "kssl_lcl.h"
128 #include <openssl/buffer.h>
129 #include <openssl/rand.h>
130 #include <openssl/objects.h>
131 #include <openssl/evp.h>
132 #include <openssl/md5.h>
133 #ifndef OPENSSL_NO_DH
134 #include <openssl/dh.h>
135 #endif
136 #include <openssl/bn.h>
137
138 static SSL_METHOD *ssl3_get_client_method(int ver);
139 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
140 #ifndef OPENSSL_NO_TLSEXT
141 static int ssl3_check_finished(SSL *s);
142 #endif
143
144 #ifndef OPENSSL_NO_ECDH
145 static int curve_id2nid(int curve_id);
146 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
147 #endif
148
149 static SSL_METHOD *ssl3_get_client_method(int ver)
150 {
151 if (ver == SSL3_VERSION)
152 return(SSLv3_client_method());
153 else
154 return(NULL);
155 }
156
157 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
158 ssl_undefined_function,
159 ssl3_connect,
160 ssl3_get_client_method)
161
162 int ssl3_connect(SSL *s)
163 {
164 BUF_MEM *buf=NULL;
165 unsigned long Time=(unsigned long)time(NULL),l;
166 long num1;
167 void (*cb)(const SSL *ssl,int type,int val)=NULL;
168 int ret= -1;
169 int new_state,state,skip=0;;
170
171 RAND_add(&Time,sizeof(Time),0);
172 ERR_clear_error();
173 clear_sys_error();
174
175 if (s->info_callback != NULL)
176 cb=s->info_callback;
177 else if (s->ctx->info_callback != NULL)
178 cb=s->ctx->info_callback;
179
180 s->in_handshake++;
181 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
182
183 for (;;)
184 {
185 state=s->state;
186
187 switch(s->state)
188 {
189 case SSL_ST_RENEGOTIATE:
190 s->new_session=1;
191 s->state=SSL_ST_CONNECT;
192 s->ctx->stats.sess_connect_renegotiate++;
193 /* break */
194 case SSL_ST_BEFORE:
195 case SSL_ST_CONNECT:
196 case SSL_ST_BEFORE|SSL_ST_CONNECT:
197 case SSL_ST_OK|SSL_ST_CONNECT:
198
199 s->server=0;
200 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
201
202 if ((s->version & 0xff00 ) != 0x0300)
203 {
204 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
205 ret = -1;
206 goto end;
207 }
208
209 /* s->version=SSL3_VERSION; */
210 s->type=SSL_ST_CONNECT;
211
212 if (s->init_buf == NULL)
213 {
214 if ((buf=BUF_MEM_new()) == NULL)
215 {
216 ret= -1;
217 goto end;
218 }
219 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
220 {
221 ret= -1;
222 goto end;
223 }
224 s->init_buf=buf;
225 buf=NULL;
226 }
227
228 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
229
230 /* setup buffing BIO */
231 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
232
233 /* don't push the buffering BIO quite yet */
234
235 ssl3_init_finished_mac(s);
236
237 s->state=SSL3_ST_CW_CLNT_HELLO_A;
238 s->ctx->stats.sess_connect++;
239 s->init_num=0;
240 break;
241
242 case SSL3_ST_CW_CLNT_HELLO_A:
243 case SSL3_ST_CW_CLNT_HELLO_B:
244
245 s->shutdown=0;
246 ret=ssl3_client_hello(s);
247 if (ret <= 0) goto end;
248 s->state=SSL3_ST_CR_SRVR_HELLO_A;
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 if (s->hit)
262 s->state=SSL3_ST_CR_FINISHED_A;
263 else
264 s->state=SSL3_ST_CR_CERT_A;
265 s->init_num=0;
266 break;
267
268 case SSL3_ST_CR_CERT_A:
269 case SSL3_ST_CR_CERT_B:
270 #ifndef OPENSSL_NO_TLSEXT
271 ret=ssl3_check_finished(s);
272 if (ret <= 0) goto end;
273 if (ret == 2)
274 {
275 s->hit = 1;
276 if (s->tlsext_ticket_expected)
277 s->state=SSL3_ST_CR_SESSION_TICKET_A;
278 else
279 s->state=SSL3_ST_CR_FINISHED_A;
280 s->init_num=0;
281 break;
282 }
283 #endif
284 /* Check if it is anon DH/ECDH */
285 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
286 {
287 ret=ssl3_get_server_certificate(s);
288 if (ret <= 0) goto end;
289 #ifndef OPENSSL_NO_TLSEXT
290 if (s->tlsext_status_expected)
291 s->state=SSL3_ST_CR_CERT_STATUS_A;
292 else
293 s->state=SSL3_ST_CR_KEY_EXCH_A;
294 }
295 else
296 {
297 skip = 1;
298 s->state=SSL3_ST_CR_KEY_EXCH_A;
299 }
300 #else
301 }
302 else
303 skip=1;
304
305 s->state=SSL3_ST_CR_KEY_EXCH_A;
306 #endif
307 s->init_num=0;
308 break;
309
310 case SSL3_ST_CR_KEY_EXCH_A:
311 case SSL3_ST_CR_KEY_EXCH_B:
312 ret=ssl3_get_key_exchange(s);
313 if (ret <= 0) goto end;
314 s->state=SSL3_ST_CR_CERT_REQ_A;
315 s->init_num=0;
316
317 /* at this point we check that we have the
318 * required stuff from the server */
319 if (!ssl3_check_cert_and_algorithm(s))
320 {
321 ret= -1;
322 goto end;
323 }
324 break;
325
326 case SSL3_ST_CR_CERT_REQ_A:
327 case SSL3_ST_CR_CERT_REQ_B:
328 ret=ssl3_get_certificate_request(s);
329 if (ret <= 0) goto end;
330 s->state=SSL3_ST_CR_SRVR_DONE_A;
331 s->init_num=0;
332 break;
333
334 case SSL3_ST_CR_SRVR_DONE_A:
335 case SSL3_ST_CR_SRVR_DONE_B:
336 ret=ssl3_get_server_done(s);
337 if (ret <= 0) goto end;
338 if (s->s3->tmp.cert_req)
339 s->state=SSL3_ST_CW_CERT_A;
340 else
341 s->state=SSL3_ST_CW_KEY_EXCH_A;
342 s->init_num=0;
343
344 break;
345
346 case SSL3_ST_CW_CERT_A:
347 case SSL3_ST_CW_CERT_B:
348 case SSL3_ST_CW_CERT_C:
349 case SSL3_ST_CW_CERT_D:
350 ret=ssl3_send_client_certificate(s);
351 if (ret <= 0) goto end;
352 s->state=SSL3_ST_CW_KEY_EXCH_A;
353 s->init_num=0;
354 break;
355
356 case SSL3_ST_CW_KEY_EXCH_A:
357 case SSL3_ST_CW_KEY_EXCH_B:
358 ret=ssl3_send_client_key_exchange(s);
359 if (ret <= 0) goto end;
360 l=s->s3->tmp.new_cipher->algorithms;
361 /* EAY EAY EAY need to check for DH fix cert
362 * sent back */
363 /* For TLS, cert_req is set to 2, so a cert chain
364 * of nothing is sent, but no verify packet is sent */
365 /* XXX: For now, we do not support client
366 * authentication in ECDH cipher suites with
367 * ECDH (rather than ECDSA) certificates.
368 * We need to skip the certificate verify
369 * message when client's ECDH public key is sent
370 * inside the client certificate.
371 */
372 if (s->s3->tmp.cert_req == 1)
373 {
374 s->state=SSL3_ST_CW_CERT_VRFY_A;
375 }
376 else
377 {
378 s->state=SSL3_ST_CW_CHANGE_A;
379 s->s3->change_cipher_spec=0;
380 }
381
382 s->init_num=0;
383 break;
384
385 case SSL3_ST_CW_CERT_VRFY_A:
386 case SSL3_ST_CW_CERT_VRFY_B:
387 ret=ssl3_send_client_verify(s);
388 if (ret <= 0) goto end;
389 s->state=SSL3_ST_CW_CHANGE_A;
390 s->init_num=0;
391 s->s3->change_cipher_spec=0;
392 break;
393
394 case SSL3_ST_CW_CHANGE_A:
395 case SSL3_ST_CW_CHANGE_B:
396 ret=ssl3_send_change_cipher_spec(s,
397 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
398 if (ret <= 0) goto end;
399 s->state=SSL3_ST_CW_FINISHED_A;
400 s->init_num=0;
401
402 s->session->cipher=s->s3->tmp.new_cipher;
403 #ifdef OPENSSL_NO_COMP
404 s->session->compress_meth=0;
405 #else
406 if (s->s3->tmp.new_compression == NULL)
407 s->session->compress_meth=0;
408 else
409 s->session->compress_meth=
410 s->s3->tmp.new_compression->id;
411 #endif
412 if (!s->method->ssl3_enc->setup_key_block(s))
413 {
414 ret= -1;
415 goto end;
416 }
417
418 if (!s->method->ssl3_enc->change_cipher_state(s,
419 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
420 {
421 ret= -1;
422 goto end;
423 }
424
425 break;
426
427 case SSL3_ST_CW_FINISHED_A:
428 case SSL3_ST_CW_FINISHED_B:
429 ret=ssl3_send_finished(s,
430 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
431 s->method->ssl3_enc->client_finished_label,
432 s->method->ssl3_enc->client_finished_label_len);
433 if (ret <= 0) goto end;
434 s->state=SSL3_ST_CW_FLUSH;
435
436 /* clear flags */
437 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
438 if (s->hit)
439 {
440 s->s3->tmp.next_state=SSL_ST_OK;
441 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
442 {
443 s->state=SSL_ST_OK;
444 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
445 s->s3->delay_buf_pop_ret=0;
446 }
447 }
448 else
449 {
450 #ifndef OPENSSL_NO_TLSEXT
451 /* Allow NewSessionTicket if ticket expected */
452 if (s->tlsext_ticket_expected)
453 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
454 else
455 #endif
456
457 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
458 }
459 s->init_num=0;
460 break;
461
462 #ifndef OPENSSL_NO_TLSEXT
463 case SSL3_ST_CR_SESSION_TICKET_A:
464 case SSL3_ST_CR_SESSION_TICKET_B:
465 ret=ssl3_get_new_session_ticket(s);
466 if (ret <= 0) goto end;
467 s->state=SSL3_ST_CR_FINISHED_A;
468 s->init_num=0;
469 break;
470
471 case SSL3_ST_CR_CERT_STATUS_A:
472 case SSL3_ST_CR_CERT_STATUS_B:
473 ret=ssl3_get_cert_status(s);
474 if (ret <= 0) goto end;
475 s->state=SSL3_ST_CR_KEY_EXCH_A;
476 s->init_num=0;
477 break;
478 #endif
479
480 case SSL3_ST_CR_FINISHED_A:
481 case SSL3_ST_CR_FINISHED_B:
482
483 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
484 SSL3_ST_CR_FINISHED_B);
485 if (ret <= 0) goto end;
486
487 if (s->hit)
488 s->state=SSL3_ST_CW_CHANGE_A;
489 else
490 s->state=SSL_ST_OK;
491 s->init_num=0;
492 break;
493
494 case SSL3_ST_CW_FLUSH:
495 /* number of bytes to be flushed */
496 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
497 if (num1 > 0)
498 {
499 s->rwstate=SSL_WRITING;
500 num1=BIO_flush(s->wbio);
501 if (num1 <= 0) { ret= -1; goto end; }
502 s->rwstate=SSL_NOTHING;
503 }
504
505 s->state=s->s3->tmp.next_state;
506 break;
507
508 case SSL_ST_OK:
509 /* clean a few things up */
510 ssl3_cleanup_key_block(s);
511
512 if (s->init_buf != NULL)
513 {
514 BUF_MEM_free(s->init_buf);
515 s->init_buf=NULL;
516 }
517
518 /* If we are not 'joining' the last two packets,
519 * remove the buffering now */
520 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
521 ssl_free_wbio_buffer(s);
522 /* else do it later in ssl3_write */
523
524 s->init_num=0;
525 s->new_session=0;
526
527 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
528 if (s->hit) s->ctx->stats.sess_hit++;
529
530 ret=1;
531 /* s->server=0; */
532 s->handshake_func=ssl3_connect;
533 s->ctx->stats.sess_connect_good++;
534
535 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
536
537 goto end;
538 /* break; */
539
540 default:
541 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
542 ret= -1;
543 goto end;
544 /* break; */
545 }
546
547 /* did we do anything */
548 if (!s->s3->tmp.reuse_message && !skip)
549 {
550 if (s->debug)
551 {
552 if ((ret=BIO_flush(s->wbio)) <= 0)
553 goto end;
554 }
555
556 if ((cb != NULL) && (s->state != state))
557 {
558 new_state=s->state;
559 s->state=state;
560 cb(s,SSL_CB_CONNECT_LOOP,1);
561 s->state=new_state;
562 }
563 }
564 skip=0;
565 }
566 end:
567 s->in_handshake--;
568 if (buf != NULL)
569 BUF_MEM_free(buf);
570 if (cb != NULL)
571 cb(s,SSL_CB_CONNECT_EXIT,ret);
572 return(ret);
573 }
574
575
576 int ssl3_client_hello(SSL *s)
577 {
578 unsigned char *buf;
579 unsigned char *p,*d;
580 int i;
581 unsigned long Time,l;
582 #ifndef OPENSSL_NO_COMP
583 int j;
584 SSL_COMP *comp;
585 #endif
586
587 buf=(unsigned char *)s->init_buf->data;
588 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
589 {
590 if ((s->session == NULL) ||
591 (s->session->ssl_version != s->version) ||
592 (s->session->not_resumable))
593 {
594 if (!ssl_get_new_session(s,0))
595 goto err;
596 }
597 /* else use the pre-loaded session */
598
599 p=s->s3->client_random;
600 Time=(unsigned long)time(NULL); /* Time */
601 l2n(Time,p);
602 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
603 goto err;
604
605 /* Do the message type and length last */
606 d=p= &(buf[4]);
607
608 *(p++)=s->version>>8;
609 *(p++)=s->version&0xff;
610 s->client_version=s->version;
611
612 /* Random stuff */
613 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
614 p+=SSL3_RANDOM_SIZE;
615
616 /* Session ID */
617 if (s->new_session)
618 i=0;
619 else
620 i=s->session->session_id_length;
621 *(p++)=i;
622 if (i != 0)
623 {
624 if (i > (int)sizeof(s->session->session_id))
625 {
626 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
627 goto err;
628 }
629 memcpy(p,s->session->session_id,i);
630 p+=i;
631 }
632
633 /* Ciphers supported */
634 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
635 if (i == 0)
636 {
637 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
638 goto err;
639 }
640 s2n(i,p);
641 p+=i;
642
643 /* COMPRESSION */
644 #ifdef OPENSSL_NO_COMP
645 *(p++)=1;
646 #else
647 if (s->ctx->comp_methods == NULL)
648 j=0;
649 else
650 j=sk_SSL_COMP_num(s->ctx->comp_methods);
651 *(p++)=1+j;
652 for (i=0; i<j; i++)
653 {
654 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
655 *(p++)=comp->id;
656 }
657 #endif
658 *(p++)=0; /* Add the NULL method */
659 #ifndef OPENSSL_NO_TLSEXT
660 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
661 {
662 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
663 goto err;
664 }
665 #endif
666 l=(p-d);
667 d=buf;
668 *(d++)=SSL3_MT_CLIENT_HELLO;
669 l2n3(l,d);
670
671 s->state=SSL3_ST_CW_CLNT_HELLO_B;
672 /* number of bytes to write */
673 s->init_num=p-buf;
674 s->init_off=0;
675 }
676
677 /* SSL3_ST_CW_CLNT_HELLO_B */
678 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
679 err:
680 return(-1);
681 }
682
683 int ssl3_get_server_hello(SSL *s)
684 {
685 STACK_OF(SSL_CIPHER) *sk;
686 SSL_CIPHER *c;
687 unsigned char *p,*d;
688 int i,al,ok;
689 unsigned int j;
690 long n;
691 #ifndef OPENSSL_NO_COMP
692 SSL_COMP *comp;
693 #endif
694
695 n=s->method->ssl_get_message(s,
696 SSL3_ST_CR_SRVR_HELLO_A,
697 SSL3_ST_CR_SRVR_HELLO_B,
698 -1,
699 20000, /* ?? */
700 &ok);
701
702 if (!ok) return((int)n);
703
704 if ( SSL_version(s) == DTLS1_VERSION)
705 {
706 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
707 {
708 if ( s->d1->send_cookie == 0)
709 {
710 s->s3->tmp.reuse_message = 1;
711 return 1;
712 }
713 else /* already sent a cookie */
714 {
715 al=SSL_AD_UNEXPECTED_MESSAGE;
716 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
717 goto f_err;
718 }
719 }
720 }
721
722 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
723 {
724 al=SSL_AD_UNEXPECTED_MESSAGE;
725 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
726 goto f_err;
727 }
728
729 d=p=(unsigned char *)s->init_msg;
730
731 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
732 {
733 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
734 s->version=(s->version&0xff00)|p[1];
735 al=SSL_AD_PROTOCOL_VERSION;
736 goto f_err;
737 }
738 p+=2;
739
740 /* load the server hello data */
741 /* load the server random */
742 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
743 p+=SSL3_RANDOM_SIZE;
744
745 /* get the session-id */
746 j= *(p++);
747
748 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
749 {
750 al=SSL_AD_ILLEGAL_PARAMETER;
751 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
752 goto f_err;
753 }
754
755 if (j != 0 && j == s->session->session_id_length
756 && memcmp(p,s->session->session_id,j) == 0)
757 {
758 if(s->sid_ctx_length != s->session->sid_ctx_length
759 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
760 {
761 /* actually a client application bug */
762 al=SSL_AD_ILLEGAL_PARAMETER;
763 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
764 goto f_err;
765 }
766 s->hit=1;
767 }
768 else /* a miss or crap from the other end */
769 {
770 /* If we were trying for session-id reuse, make a new
771 * SSL_SESSION so we don't stuff up other people */
772 s->hit=0;
773 if (s->session->session_id_length > 0)
774 {
775 if (!ssl_get_new_session(s,0))
776 {
777 al=SSL_AD_INTERNAL_ERROR;
778 goto f_err;
779 }
780 }
781 s->session->session_id_length=j;
782 memcpy(s->session->session_id,p,j); /* j could be 0 */
783 }
784 p+=j;
785 c=ssl_get_cipher_by_char(s,p);
786 if (c == NULL)
787 {
788 /* unknown cipher */
789 al=SSL_AD_ILLEGAL_PARAMETER;
790 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
791 goto f_err;
792 }
793 p+=ssl_put_cipher_by_char(s,NULL,NULL);
794
795 sk=ssl_get_ciphers_by_id(s);
796 i=sk_SSL_CIPHER_find(sk,c);
797 if (i < 0)
798 {
799 /* we did not say we would use this cipher */
800 al=SSL_AD_ILLEGAL_PARAMETER;
801 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
802 goto f_err;
803 }
804
805 /* Depending on the session caching (internal/external), the cipher
806 and/or cipher_id values may not be set. Make sure that
807 cipher_id is set and use it for comparison. */
808 if (s->session->cipher)
809 s->session->cipher_id = s->session->cipher->id;
810 if (s->hit && (s->session->cipher_id != c->id))
811 {
812 if (!(s->options &
813 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
814 {
815 al=SSL_AD_ILLEGAL_PARAMETER;
816 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
817 goto f_err;
818 }
819 }
820 s->s3->tmp.new_cipher=c;
821
822 /* lets get the compression algorithm */
823 /* COMPRESSION */
824 #ifdef OPENSSL_NO_COMP
825 if (*(p++) != 0)
826 {
827 al=SSL_AD_ILLEGAL_PARAMETER;
828 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
829 goto f_err;
830 }
831 #else
832 j= *(p++);
833 if (j == 0)
834 comp=NULL;
835 else
836 comp=ssl3_comp_find(s->ctx->comp_methods,j);
837
838 if ((j != 0) && (comp == NULL))
839 {
840 al=SSL_AD_ILLEGAL_PARAMETER;
841 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
842 goto f_err;
843 }
844 else
845 {
846 s->s3->tmp.new_compression=comp;
847 }
848 #endif
849 #ifndef OPENSSL_NO_TLSEXT
850 /* TLS extensions*/
851 if (s->version > SSL3_VERSION)
852 {
853 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
854 {
855 /* 'al' set by ssl_parse_serverhello_tlsext */
856 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
857 goto f_err;
858 }
859 if (ssl_check_serverhello_tlsext(s) <= 0)
860 {
861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
862 goto err;
863 }
864 }
865 #endif
866
867
868 if (p != (d+n))
869 {
870 /* wrong packet length */
871 al=SSL_AD_DECODE_ERROR;
872 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
873 goto err;
874 }
875
876 return(1);
877 f_err:
878 ssl3_send_alert(s,SSL3_AL_FATAL,al);
879 err:
880 return(-1);
881 }
882
883 int ssl3_get_server_certificate(SSL *s)
884 {
885 int al,i,ok,ret= -1;
886 unsigned long n,nc,llen,l;
887 X509 *x=NULL;
888 const unsigned char *q,*p;
889 unsigned char *d;
890 STACK_OF(X509) *sk=NULL;
891 SESS_CERT *sc;
892 EVP_PKEY *pkey=NULL;
893 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
894
895 n=s->method->ssl_get_message(s,
896 SSL3_ST_CR_CERT_A,
897 SSL3_ST_CR_CERT_B,
898 -1,
899 s->max_cert_list,
900 &ok);
901
902 if (!ok) return((int)n);
903
904 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
905 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) &&
906 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
907 {
908 s->s3->tmp.reuse_message=1;
909 return(1);
910 }
911
912 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
913 {
914 al=SSL_AD_UNEXPECTED_MESSAGE;
915 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
916 goto f_err;
917 }
918 p=d=(unsigned char *)s->init_msg;
919
920 if ((sk=sk_X509_new_null()) == NULL)
921 {
922 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
923 goto err;
924 }
925
926 n2l3(p,llen);
927 if (llen+3 != n)
928 {
929 al=SSL_AD_DECODE_ERROR;
930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
931 goto f_err;
932 }
933 for (nc=0; nc<llen; )
934 {
935 n2l3(p,l);
936 if ((l+nc+3) > llen)
937 {
938 al=SSL_AD_DECODE_ERROR;
939 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
940 goto f_err;
941 }
942
943 q=p;
944 x=d2i_X509(NULL,&q,l);
945 if (x == NULL)
946 {
947 al=SSL_AD_BAD_CERTIFICATE;
948 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
949 goto f_err;
950 }
951 if (q != (p+l))
952 {
953 al=SSL_AD_DECODE_ERROR;
954 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
955 goto f_err;
956 }
957 if (!sk_X509_push(sk,x))
958 {
959 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
960 goto err;
961 }
962 x=NULL;
963 nc+=l+3;
964 p=q;
965 }
966
967 i=ssl_verify_cert_chain(s,sk);
968 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
969 #ifndef OPENSSL_NO_KRB5
970 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
971 != (SSL_aKRB5|SSL_kKRB5)
972 #endif /* OPENSSL_NO_KRB5 */
973 )
974 {
975 al=ssl_verify_alarm_type(s->verify_result);
976 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
977 goto f_err;
978 }
979 ERR_clear_error(); /* but we keep s->verify_result */
980
981 sc=ssl_sess_cert_new();
982 if (sc == NULL) goto err;
983
984 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
985 s->session->sess_cert=sc;
986
987 sc->cert_chain=sk;
988 /* Inconsistency alert: cert_chain does include the peer's
989 * certificate, which we don't include in s3_srvr.c */
990 x=sk_X509_value(sk,0);
991 sk=NULL;
992 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
993
994 pkey=X509_get_pubkey(x);
995
996 /* VRS: allow null cert if auth == KRB5 */
997 need_cert = ((s->s3->tmp.new_cipher->algorithms
998 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
999 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
1000
1001 #ifdef KSSL_DEBUG
1002 printf("pkey,x = %p, %p\n", pkey,x);
1003 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1004 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
1005 s->s3->tmp.new_cipher->algorithms, need_cert);
1006 #endif /* KSSL_DEBUG */
1007
1008 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1009 {
1010 x=NULL;
1011 al=SSL3_AL_FATAL;
1012 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1013 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1014 goto f_err;
1015 }
1016
1017 i=ssl_cert_type(x,pkey);
1018 if (need_cert && i < 0)
1019 {
1020 x=NULL;
1021 al=SSL3_AL_FATAL;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1023 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1024 goto f_err;
1025 }
1026
1027 if (need_cert)
1028 {
1029 sc->peer_cert_type=i;
1030 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1031 /* Why would the following ever happen?
1032 * We just created sc a couple of lines ago. */
1033 if (sc->peer_pkeys[i].x509 != NULL)
1034 X509_free(sc->peer_pkeys[i].x509);
1035 sc->peer_pkeys[i].x509=x;
1036 sc->peer_key= &(sc->peer_pkeys[i]);
1037
1038 if (s->session->peer != NULL)
1039 X509_free(s->session->peer);
1040 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1041 s->session->peer=x;
1042 }
1043 else
1044 {
1045 sc->peer_cert_type=i;
1046 sc->peer_key= NULL;
1047
1048 if (s->session->peer != NULL)
1049 X509_free(s->session->peer);
1050 s->session->peer=NULL;
1051 }
1052 s->session->verify_result = s->verify_result;
1053
1054 x=NULL;
1055 ret=1;
1056
1057 if (0)
1058 {
1059 f_err:
1060 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1061 }
1062 err:
1063 EVP_PKEY_free(pkey);
1064 X509_free(x);
1065 sk_X509_pop_free(sk,X509_free);
1066 return(ret);
1067 }
1068
1069 int ssl3_get_key_exchange(SSL *s)
1070 {
1071 #ifndef OPENSSL_NO_RSA
1072 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1073 #endif
1074 EVP_MD_CTX md_ctx;
1075 unsigned char *param,*p;
1076 int al,i,j,param_len,ok;
1077 long n,alg;
1078 EVP_PKEY *pkey=NULL;
1079 #ifndef OPENSSL_NO_RSA
1080 RSA *rsa=NULL;
1081 #endif
1082 #ifndef OPENSSL_NO_DH
1083 DH *dh=NULL;
1084 #endif
1085 #ifndef OPENSSL_NO_ECDH
1086 EC_KEY *ecdh = NULL;
1087 BN_CTX *bn_ctx = NULL;
1088 EC_POINT *srvr_ecpoint = NULL;
1089 int curve_nid = 0;
1090 int encoded_pt_len = 0;
1091 #endif
1092
1093 /* use same message size as in ssl3_get_certificate_request()
1094 * as ServerKeyExchange message may be skipped */
1095 n=s->method->ssl_get_message(s,
1096 SSL3_ST_CR_KEY_EXCH_A,
1097 SSL3_ST_CR_KEY_EXCH_B,
1098 -1,
1099 s->max_cert_list,
1100 &ok);
1101
1102 if (!ok) return((int)n);
1103
1104 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1105 {
1106 s->s3->tmp.reuse_message=1;
1107 return(1);
1108 }
1109
1110 param=p=(unsigned char *)s->init_msg;
1111
1112 if (s->session->sess_cert != NULL)
1113 {
1114 #ifndef OPENSSL_NO_RSA
1115 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1116 {
1117 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1118 s->session->sess_cert->peer_rsa_tmp=NULL;
1119 }
1120 #endif
1121 #ifndef OPENSSL_NO_DH
1122 if (s->session->sess_cert->peer_dh_tmp)
1123 {
1124 DH_free(s->session->sess_cert->peer_dh_tmp);
1125 s->session->sess_cert->peer_dh_tmp=NULL;
1126 }
1127 #endif
1128 #ifndef OPENSSL_NO_ECDH
1129 if (s->session->sess_cert->peer_ecdh_tmp)
1130 {
1131 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1132 s->session->sess_cert->peer_ecdh_tmp=NULL;
1133 }
1134 #endif
1135 }
1136 else
1137 {
1138 s->session->sess_cert=ssl_sess_cert_new();
1139 }
1140
1141 param_len=0;
1142 alg=s->s3->tmp.new_cipher->algorithms;
1143 EVP_MD_CTX_init(&md_ctx);
1144
1145 #ifndef OPENSSL_NO_RSA
1146 if (alg & SSL_kRSA)
1147 {
1148 if ((rsa=RSA_new()) == NULL)
1149 {
1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1151 goto err;
1152 }
1153 n2s(p,i);
1154 param_len=i+2;
1155 if (param_len > n)
1156 {
1157 al=SSL_AD_DECODE_ERROR;
1158 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1159 goto f_err;
1160 }
1161 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1162 {
1163 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1164 goto err;
1165 }
1166 p+=i;
1167
1168 n2s(p,i);
1169 param_len+=i+2;
1170 if (param_len > n)
1171 {
1172 al=SSL_AD_DECODE_ERROR;
1173 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1174 goto f_err;
1175 }
1176 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1177 {
1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1179 goto err;
1180 }
1181 p+=i;
1182 n-=param_len;
1183
1184 /* this should be because we are using an export cipher */
1185 if (alg & SSL_aRSA)
1186 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1187 else
1188 {
1189 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1190 goto err;
1191 }
1192 s->session->sess_cert->peer_rsa_tmp=rsa;
1193 rsa=NULL;
1194 }
1195 #else /* OPENSSL_NO_RSA */
1196 if (0)
1197 ;
1198 #endif
1199 #ifndef OPENSSL_NO_DH
1200 else if (alg & SSL_kEDH)
1201 {
1202 if ((dh=DH_new()) == NULL)
1203 {
1204 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1205 goto err;
1206 }
1207 n2s(p,i);
1208 param_len=i+2;
1209 if (param_len > n)
1210 {
1211 al=SSL_AD_DECODE_ERROR;
1212 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1213 goto f_err;
1214 }
1215 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1216 {
1217 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1218 goto err;
1219 }
1220 p+=i;
1221
1222 n2s(p,i);
1223 param_len+=i+2;
1224 if (param_len > n)
1225 {
1226 al=SSL_AD_DECODE_ERROR;
1227 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1228 goto f_err;
1229 }
1230 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1231 {
1232 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1233 goto err;
1234 }
1235 p+=i;
1236
1237 n2s(p,i);
1238 param_len+=i+2;
1239 if (param_len > n)
1240 {
1241 al=SSL_AD_DECODE_ERROR;
1242 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1243 goto f_err;
1244 }
1245 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1246 {
1247 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1248 goto err;
1249 }
1250 p+=i;
1251 n-=param_len;
1252
1253 #ifndef OPENSSL_NO_RSA
1254 if (alg & SSL_aRSA)
1255 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1256 #else
1257 if (0)
1258 ;
1259 #endif
1260 #ifndef OPENSSL_NO_DSA
1261 else if (alg & SSL_aDSS)
1262 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1263 #endif
1264 /* else anonymous DH, so no certificate or pkey. */
1265
1266 s->session->sess_cert->peer_dh_tmp=dh;
1267 dh=NULL;
1268 }
1269 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1270 {
1271 al=SSL_AD_ILLEGAL_PARAMETER;
1272 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1273 goto f_err;
1274 }
1275 #endif /* !OPENSSL_NO_DH */
1276
1277 #ifndef OPENSSL_NO_ECDH
1278 else if (alg & SSL_kECDHE)
1279 {
1280 EC_GROUP *ngroup;
1281 const EC_GROUP *group;
1282
1283 if ((ecdh=EC_KEY_new()) == NULL)
1284 {
1285 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1286 goto err;
1287 }
1288
1289 /* Extract elliptic curve parameters and the
1290 * server's ephemeral ECDH public key.
1291 * Keep accumulating lengths of various components in
1292 * param_len and make sure it never exceeds n.
1293 */
1294
1295 /* XXX: For now we only support named (not generic) curves
1296 * and the ECParameters in this case is just three bytes.
1297 */
1298 param_len=3;
1299 if ((param_len > n) ||
1300 (*p != NAMED_CURVE_TYPE) ||
1301 ((curve_nid = curve_id2nid(*(p + 2))) == 0))
1302 {
1303 al=SSL_AD_INTERNAL_ERROR;
1304 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1305 goto f_err;
1306 }
1307
1308 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1309 if (ngroup == NULL)
1310 {
1311 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1312 goto err;
1313 }
1314 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1315 {
1316 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1317 goto err;
1318 }
1319 EC_GROUP_free(ngroup);
1320
1321 group = EC_KEY_get0_group(ecdh);
1322
1323 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1324 (EC_GROUP_get_degree(group) > 163))
1325 {
1326 al=SSL_AD_EXPORT_RESTRICTION;
1327 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1328 goto f_err;
1329 }
1330
1331 p+=3;
1332
1333 /* Next, get the encoded ECPoint */
1334 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1335 ((bn_ctx = BN_CTX_new()) == NULL))
1336 {
1337 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1338 goto err;
1339 }
1340
1341 encoded_pt_len = *p; /* length of encoded point */
1342 p+=1;
1343 param_len += (1 + encoded_pt_len);
1344 if ((param_len > n) ||
1345 (EC_POINT_oct2point(group, srvr_ecpoint,
1346 p, encoded_pt_len, bn_ctx) == 0))
1347 {
1348 al=SSL_AD_DECODE_ERROR;
1349 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1350 goto f_err;
1351 }
1352
1353 n-=param_len;
1354 p+=encoded_pt_len;
1355
1356 /* The ECC/TLS specification does not mention
1357 * the use of DSA to sign ECParameters in the server
1358 * key exchange message. We do support RSA and ECDSA.
1359 */
1360 if (0) ;
1361 #ifndef OPENSSL_NO_RSA
1362 else if (alg & SSL_aRSA)
1363 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1364 #endif
1365 #ifndef OPENSSL_NO_ECDSA
1366 else if (alg & SSL_aECDSA)
1367 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1368 #endif
1369 /* else anonymous ECDH, so no certificate or pkey. */
1370 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1371 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1372 ecdh=NULL;
1373 BN_CTX_free(bn_ctx);
1374 EC_POINT_free(srvr_ecpoint);
1375 srvr_ecpoint = NULL;
1376 }
1377 else if (alg & SSL_kECDH)
1378 {
1379 al=SSL_AD_UNEXPECTED_MESSAGE;
1380 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1381 goto f_err;
1382 }
1383 #endif /* !OPENSSL_NO_ECDH */
1384 if (alg & SSL_aFZA)
1385 {
1386 al=SSL_AD_HANDSHAKE_FAILURE;
1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1388 goto f_err;
1389 }
1390
1391
1392 /* p points to the next byte, there are 'n' bytes left */
1393
1394 /* if it was signed, check the signature */
1395 if (pkey != NULL)
1396 {
1397 n2s(p,i);
1398 n-=2;
1399 j=EVP_PKEY_size(pkey);
1400
1401 if ((i != n) || (n > j) || (n <= 0))
1402 {
1403 /* wrong packet length */
1404 al=SSL_AD_DECODE_ERROR;
1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1406 goto f_err;
1407 }
1408
1409 #ifndef OPENSSL_NO_RSA
1410 if (pkey->type == EVP_PKEY_RSA)
1411 {
1412 int num;
1413
1414 j=0;
1415 q=md_buf;
1416 for (num=2; num > 0; num--)
1417 {
1418 EVP_DigestInit_ex(&md_ctx,(num == 2)
1419 ?s->ctx->md5:s->ctx->sha1, NULL);
1420 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1421 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1422 EVP_DigestUpdate(&md_ctx,param,param_len);
1423 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1424 q+=i;
1425 j+=i;
1426 }
1427 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1428 pkey->pkey.rsa);
1429 if (i < 0)
1430 {
1431 al=SSL_AD_DECRYPT_ERROR;
1432 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1433 goto f_err;
1434 }
1435 if (i == 0)
1436 {
1437 /* bad signature */
1438 al=SSL_AD_DECRYPT_ERROR;
1439 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1440 goto f_err;
1441 }
1442 }
1443 else
1444 #endif
1445 #ifndef OPENSSL_NO_DSA
1446 if (pkey->type == EVP_PKEY_DSA)
1447 {
1448 /* lets do DSS */
1449 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1450 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1451 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1452 EVP_VerifyUpdate(&md_ctx,param,param_len);
1453 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1454 {
1455 /* bad signature */
1456 al=SSL_AD_DECRYPT_ERROR;
1457 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1458 goto f_err;
1459 }
1460 }
1461 else
1462 #endif
1463 #ifndef OPENSSL_NO_ECDSA
1464 if (pkey->type == EVP_PKEY_EC)
1465 {
1466 /* let's do ECDSA */
1467 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1468 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1469 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1470 EVP_VerifyUpdate(&md_ctx,param,param_len);
1471 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1472 {
1473 /* bad signature */
1474 al=SSL_AD_DECRYPT_ERROR;
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1476 goto f_err;
1477 }
1478 }
1479 else
1480 #endif
1481 {
1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1483 goto err;
1484 }
1485 }
1486 else
1487 {
1488 /* still data left over */
1489 if (!(alg & SSL_aNULL))
1490 {
1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1492 goto err;
1493 }
1494 if (n != 0)
1495 {
1496 al=SSL_AD_DECODE_ERROR;
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1498 goto f_err;
1499 }
1500 }
1501 EVP_PKEY_free(pkey);
1502 EVP_MD_CTX_cleanup(&md_ctx);
1503 return(1);
1504 f_err:
1505 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1506 err:
1507 EVP_PKEY_free(pkey);
1508 #ifndef OPENSSL_NO_RSA
1509 if (rsa != NULL)
1510 RSA_free(rsa);
1511 #endif
1512 #ifndef OPENSSL_NO_DH
1513 if (dh != NULL)
1514 DH_free(dh);
1515 #endif
1516 #ifndef OPENSSL_NO_ECDH
1517 BN_CTX_free(bn_ctx);
1518 EC_POINT_free(srvr_ecpoint);
1519 if (ecdh != NULL)
1520 EC_KEY_free(ecdh);
1521 #endif
1522 EVP_MD_CTX_cleanup(&md_ctx);
1523 return(-1);
1524 }
1525
1526 int ssl3_get_certificate_request(SSL *s)
1527 {
1528 int ok,ret=0;
1529 unsigned long n,nc,l;
1530 unsigned int llen,ctype_num,i;
1531 X509_NAME *xn=NULL;
1532 const unsigned char *p,*q;
1533 unsigned char *d;
1534 STACK_OF(X509_NAME) *ca_sk=NULL;
1535
1536 n=s->method->ssl_get_message(s,
1537 SSL3_ST_CR_CERT_REQ_A,
1538 SSL3_ST_CR_CERT_REQ_B,
1539 -1,
1540 s->max_cert_list,
1541 &ok);
1542
1543 if (!ok) return((int)n);
1544
1545 s->s3->tmp.cert_req=0;
1546
1547 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1548 {
1549 s->s3->tmp.reuse_message=1;
1550 return(1);
1551 }
1552
1553 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1554 {
1555 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1556 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1557 goto err;
1558 }
1559
1560 /* TLS does not like anon-DH with client cert */
1561 if (s->version > SSL3_VERSION)
1562 {
1563 l=s->s3->tmp.new_cipher->algorithms;
1564 if (l & SSL_aNULL)
1565 {
1566 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1567 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1568 goto err;
1569 }
1570 }
1571
1572 p=d=(unsigned char *)s->init_msg;
1573
1574 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1575 {
1576 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1577 goto err;
1578 }
1579
1580 /* get the certificate types */
1581 ctype_num= *(p++);
1582 if (ctype_num > SSL3_CT_NUMBER)
1583 ctype_num=SSL3_CT_NUMBER;
1584 for (i=0; i<ctype_num; i++)
1585 s->s3->tmp.ctype[i]= p[i];
1586 p+=ctype_num;
1587
1588 /* get the CA RDNs */
1589 n2s(p,llen);
1590 #if 0
1591 {
1592 FILE *out;
1593 out=fopen("/tmp/vsign.der","w");
1594 fwrite(p,1,llen,out);
1595 fclose(out);
1596 }
1597 #endif
1598
1599 if ((llen+ctype_num+2+1) != n)
1600 {
1601 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1602 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1603 goto err;
1604 }
1605
1606 for (nc=0; nc<llen; )
1607 {
1608 n2s(p,l);
1609 if ((l+nc+2) > llen)
1610 {
1611 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1612 goto cont; /* netscape bugs */
1613 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1614 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1615 goto err;
1616 }
1617
1618 q=p;
1619
1620 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1621 {
1622 /* If netscape tolerance is on, ignore errors */
1623 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1624 goto cont;
1625 else
1626 {
1627 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1628 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1629 goto err;
1630 }
1631 }
1632
1633 if (q != (p+l))
1634 {
1635 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1636 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1637 goto err;
1638 }
1639 if (!sk_X509_NAME_push(ca_sk,xn))
1640 {
1641 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1642 goto err;
1643 }
1644
1645 p+=l;
1646 nc+=l+2;
1647 }
1648
1649 if (0)
1650 {
1651 cont:
1652 ERR_clear_error();
1653 }
1654
1655 /* we should setup a certificate to return.... */
1656 s->s3->tmp.cert_req=1;
1657 s->s3->tmp.ctype_num=ctype_num;
1658 if (s->s3->tmp.ca_names != NULL)
1659 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1660 s->s3->tmp.ca_names=ca_sk;
1661 ca_sk=NULL;
1662
1663 ret=1;
1664 err:
1665 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1666 return(ret);
1667 }
1668
1669 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1670 {
1671 return(X509_NAME_cmp(*a,*b));
1672 }
1673 #ifndef OPENSSL_NO_TLSEXT
1674 int ssl3_get_new_session_ticket(SSL *s)
1675 {
1676 int ok,al,ret=0, ticklen;
1677 long n;
1678 const unsigned char *p;
1679 unsigned char *d;
1680
1681 n=s->method->ssl_get_message(s,
1682 SSL3_ST_CR_SESSION_TICKET_A,
1683 SSL3_ST_CR_SESSION_TICKET_B,
1684 -1,
1685 16384,
1686 &ok);
1687
1688 if (!ok)
1689 return((int)n);
1690
1691 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1692 {
1693 s->s3->tmp.reuse_message=1;
1694 return(1);
1695 }
1696 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1697 {
1698 al=SSL_AD_UNEXPECTED_MESSAGE;
1699 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1700 goto f_err;
1701 }
1702 if (n < 6)
1703 {
1704 /* need at least ticket_lifetime_hint + ticket length */
1705 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1706 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1707 goto f_err;
1708 }
1709 p=d=(unsigned char *)s->init_msg;
1710 n2l(p, s->session->tlsext_tick_lifetime_hint);
1711 n2s(p, ticklen);
1712 /* ticket_lifetime_hint + ticket_length + ticket */
1713 if (ticklen + 6 != n)
1714 {
1715 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1716 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1717 goto f_err;
1718 }
1719 if (s->session->tlsext_tick)
1720 {
1721 OPENSSL_free(s->session->tlsext_tick);
1722 s->session->tlsext_ticklen = 0;
1723 }
1724 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1725 if (!s->session->tlsext_tick)
1726 {
1727 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1728 goto err;
1729 }
1730 memcpy(s->session->tlsext_tick, p, ticklen);
1731 s->session->tlsext_ticklen = ticklen;
1732
1733 ret=1;
1734 return(ret);
1735 f_err:
1736 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1737 err:
1738 return(-1);
1739 }
1740
1741 int ssl3_get_cert_status(SSL *s)
1742 {
1743 int ok, al;
1744 unsigned long resplen;
1745 long n;
1746 const unsigned char *p;
1747
1748 n=s->method->ssl_get_message(s,
1749 SSL3_ST_CR_CERT_STATUS_A,
1750 SSL3_ST_CR_CERT_STATUS_B,
1751 SSL3_MT_CERTIFICATE_STATUS,
1752 16384,
1753 &ok);
1754
1755 if (!ok) return((int)n);
1756 if (n < 4)
1757 {
1758 /* need at least status type + length */
1759 al = SSL_AD_DECODE_ERROR;
1760 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1761 goto f_err;
1762 }
1763 p = (unsigned char *)s->init_msg;
1764 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1765 {
1766 al = SSL_AD_DECODE_ERROR;
1767 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1768 goto f_err;
1769 }
1770 n2l3(p, resplen);
1771 if (resplen + 4 != n)
1772 {
1773 al = SSL_AD_DECODE_ERROR;
1774 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1775 goto f_err;
1776 }
1777 if (s->tlsext_ocsp_resp)
1778 OPENSSL_free(s->tlsext_ocsp_resp);
1779 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1780 if (!s->tlsext_ocsp_resp)
1781 {
1782 al = SSL_AD_INTERNAL_ERROR;
1783 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1784 goto f_err;
1785 }
1786 s->tlsext_ocsp_resplen = resplen;
1787 if (s->ctx->tlsext_status_cb)
1788 {
1789 int ret;
1790 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1791 if (ret == 0)
1792 {
1793 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1794 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1795 goto f_err;
1796 }
1797 if (ret < 0)
1798 {
1799 al = SSL_AD_INTERNAL_ERROR;
1800 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1801 goto f_err;
1802 }
1803 }
1804 return 1;
1805 f_err:
1806 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1807 return(-1);
1808 }
1809 #endif
1810
1811 int ssl3_get_server_done(SSL *s)
1812 {
1813 int ok,ret=0;
1814 long n;
1815
1816 n=s->method->ssl_get_message(s,
1817 SSL3_ST_CR_SRVR_DONE_A,
1818 SSL3_ST_CR_SRVR_DONE_B,
1819 SSL3_MT_SERVER_DONE,
1820 30, /* should be very small, like 0 :-) */
1821 &ok);
1822
1823 if (!ok) return((int)n);
1824 if (n > 0)
1825 {
1826 /* should contain no data */
1827 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1828 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1829 return -1;
1830 }
1831 ret=1;
1832 return(ret);
1833 }
1834
1835
1836 int ssl3_send_client_key_exchange(SSL *s)
1837 {
1838 unsigned char *p,*d;
1839 int n;
1840 unsigned long l;
1841 #ifndef OPENSSL_NO_RSA
1842 unsigned char *q;
1843 EVP_PKEY *pkey=NULL;
1844 #endif
1845 #ifndef OPENSSL_NO_KRB5
1846 KSSL_ERR kssl_err;
1847 #endif /* OPENSSL_NO_KRB5 */
1848 #ifndef OPENSSL_NO_ECDH
1849 EC_KEY *clnt_ecdh = NULL;
1850 const EC_POINT *srvr_ecpoint = NULL;
1851 EVP_PKEY *srvr_pub_pkey = NULL;
1852 unsigned char *encodedPoint = NULL;
1853 int encoded_pt_len = 0;
1854 BN_CTX * bn_ctx = NULL;
1855 #endif
1856
1857 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1858 {
1859 d=(unsigned char *)s->init_buf->data;
1860 p= &(d[4]);
1861
1862 l=s->s3->tmp.new_cipher->algorithms;
1863
1864 /* Fool emacs indentation */
1865 if (0) {}
1866 #ifndef OPENSSL_NO_RSA
1867 else if (l & SSL_kRSA)
1868 {
1869 RSA *rsa;
1870 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1871
1872 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1873 rsa=s->session->sess_cert->peer_rsa_tmp;
1874 else
1875 {
1876 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1877 if ((pkey == NULL) ||
1878 (pkey->type != EVP_PKEY_RSA) ||
1879 (pkey->pkey.rsa == NULL))
1880 {
1881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1882 goto err;
1883 }
1884 rsa=pkey->pkey.rsa;
1885 EVP_PKEY_free(pkey);
1886 }
1887
1888 tmp_buf[0]=s->client_version>>8;
1889 tmp_buf[1]=s->client_version&0xff;
1890 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1891 goto err;
1892
1893 s->session->master_key_length=sizeof tmp_buf;
1894
1895 q=p;
1896 /* Fix buf for TLS and beyond */
1897 if (s->version > SSL3_VERSION)
1898 p+=2;
1899 n=RSA_public_encrypt(sizeof tmp_buf,
1900 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1901 #ifdef PKCS1_CHECK
1902 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1903 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1904 #endif
1905 if (n <= 0)
1906 {
1907 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1908 goto err;
1909 }
1910
1911 /* Fix buf for TLS and beyond */
1912 if (s->version > SSL3_VERSION)
1913 {
1914 s2n(n,q);
1915 n+=2;
1916 }
1917
1918 s->session->master_key_length=
1919 s->method->ssl3_enc->generate_master_secret(s,
1920 s->session->master_key,
1921 tmp_buf,sizeof tmp_buf);
1922 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1923 }
1924 #endif
1925 #ifndef OPENSSL_NO_KRB5
1926 else if (l & SSL_kKRB5)
1927 {
1928 krb5_error_code krb5rc;
1929 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1930 /* krb5_data krb5_ap_req; */
1931 krb5_data *enc_ticket;
1932 krb5_data authenticator, *authp = NULL;
1933 EVP_CIPHER_CTX ciph_ctx;
1934 EVP_CIPHER *enc = NULL;
1935 unsigned char iv[EVP_MAX_IV_LENGTH];
1936 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1937 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1938 + EVP_MAX_IV_LENGTH];
1939 int padl, outl = sizeof(epms);
1940
1941 EVP_CIPHER_CTX_init(&ciph_ctx);
1942
1943 #ifdef KSSL_DEBUG
1944 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1945 l, SSL_kKRB5);
1946 #endif /* KSSL_DEBUG */
1947
1948 authp = NULL;
1949 #ifdef KRB5SENDAUTH
1950 if (KRB5SENDAUTH) authp = &authenticator;
1951 #endif /* KRB5SENDAUTH */
1952
1953 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1954 &kssl_err);
1955 enc = kssl_map_enc(kssl_ctx->enctype);
1956 if (enc == NULL)
1957 goto err;
1958 #ifdef KSSL_DEBUG
1959 {
1960 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1961 if (krb5rc && kssl_err.text)
1962 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1963 }
1964 #endif /* KSSL_DEBUG */
1965
1966 if (krb5rc)
1967 {
1968 ssl3_send_alert(s,SSL3_AL_FATAL,
1969 SSL_AD_HANDSHAKE_FAILURE);
1970 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1971 kssl_err.reason);
1972 goto err;
1973 }
1974
1975 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1976 ** in place of RFC 2712 KerberosWrapper, as in:
1977 **
1978 ** Send ticket (copy to *p, set n = length)
1979 ** n = krb5_ap_req.length;
1980 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1981 ** if (krb5_ap_req.data)
1982 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1983 **
1984 ** Now using real RFC 2712 KerberosWrapper
1985 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1986 ** Note: 2712 "opaque" types are here replaced
1987 ** with a 2-byte length followed by the value.
1988 ** Example:
1989 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1990 ** Where "xx xx" = length bytes. Shown here with
1991 ** optional authenticator omitted.
1992 */
1993
1994 /* KerberosWrapper.Ticket */
1995 s2n(enc_ticket->length,p);
1996 memcpy(p, enc_ticket->data, enc_ticket->length);
1997 p+= enc_ticket->length;
1998 n = enc_ticket->length + 2;
1999
2000 /* KerberosWrapper.Authenticator */
2001 if (authp && authp->length)
2002 {
2003 s2n(authp->length,p);
2004 memcpy(p, authp->data, authp->length);
2005 p+= authp->length;
2006 n+= authp->length + 2;
2007
2008 free(authp->data);
2009 authp->data = NULL;
2010 authp->length = 0;
2011 }
2012 else
2013 {
2014 s2n(0,p);/* null authenticator length */
2015 n+=2;
2016 }
2017
2018 tmp_buf[0]=s->client_version>>8;
2019 tmp_buf[1]=s->client_version&0xff;
2020 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2021 goto err;
2022
2023 /* 20010420 VRS. Tried it this way; failed.
2024 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2025 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2026 ** kssl_ctx->length);
2027 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2028 */
2029
2030 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2031 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2032 kssl_ctx->key,iv);
2033 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2034 sizeof tmp_buf);
2035 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2036 outl += padl;
2037 if (outl > sizeof epms)
2038 {
2039 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2040 goto err;
2041 }
2042 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2043
2044 /* KerberosWrapper.EncryptedPreMasterSecret */
2045 s2n(outl,p);
2046 memcpy(p, epms, outl);
2047 p+=outl;
2048 n+=outl + 2;
2049
2050 s->session->master_key_length=
2051 s->method->ssl3_enc->generate_master_secret(s,
2052 s->session->master_key,
2053 tmp_buf, sizeof tmp_buf);
2054
2055 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2056 OPENSSL_cleanse(epms, outl);
2057 }
2058 #endif
2059 #ifndef OPENSSL_NO_DH
2060 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2061 {
2062 DH *dh_srvr,*dh_clnt;
2063
2064 if (s->session->sess_cert == NULL)
2065 {
2066 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2067 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2068 goto err;
2069 }
2070
2071 if (s->session->sess_cert->peer_dh_tmp != NULL)
2072 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2073 else
2074 {
2075 /* we get them from the cert */
2076 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2077 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2078 goto err;
2079 }
2080
2081 /* generate a new random key */
2082 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2083 {
2084 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2085 goto err;
2086 }
2087 if (!DH_generate_key(dh_clnt))
2088 {
2089 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2090 goto err;
2091 }
2092
2093 /* use the 'p' output buffer for the DH key, but
2094 * make sure to clear it out afterwards */
2095
2096 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2097
2098 if (n <= 0)
2099 {
2100 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2101 goto err;
2102 }
2103
2104 /* generate master key from the result */
2105 s->session->master_key_length=
2106 s->method->ssl3_enc->generate_master_secret(s,
2107 s->session->master_key,p,n);
2108 /* clean up */
2109 memset(p,0,n);
2110
2111 /* send off the data */
2112 n=BN_num_bytes(dh_clnt->pub_key);
2113 s2n(n,p);
2114 BN_bn2bin(dh_clnt->pub_key,p);
2115 n+=2;
2116
2117 DH_free(dh_clnt);
2118
2119 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2120 }
2121 #endif
2122
2123 #ifndef OPENSSL_NO_ECDH
2124 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
2125 {
2126 const EC_GROUP *srvr_group = NULL;
2127 EC_KEY *tkey;
2128 int ecdh_clnt_cert = 0;
2129 int field_size = 0;
2130
2131 /* Did we send out the client's
2132 * ECDH share for use in premaster
2133 * computation as part of client certificate?
2134 * If so, set ecdh_clnt_cert to 1.
2135 */
2136 if ((l & SSL_kECDH) && (s->cert != NULL))
2137 {
2138 /* XXX: For now, we do not support client
2139 * authentication using ECDH certificates.
2140 * To add such support, one needs to add
2141 * code that checks for appropriate
2142 * conditions and sets ecdh_clnt_cert to 1.
2143 * For example, the cert have an ECC
2144 * key on the same curve as the server's
2145 * and the key should be authorized for
2146 * key agreement.
2147 *
2148 * One also needs to add code in ssl3_connect
2149 * to skip sending the certificate verify
2150 * message.
2151 *
2152 * if ((s->cert->key->privatekey != NULL) &&
2153 * (s->cert->key->privatekey->type ==
2154 * EVP_PKEY_EC) && ...)
2155 * ecdh_clnt_cert = 1;
2156 */
2157 }
2158
2159 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2160 {
2161 tkey = s->session->sess_cert->peer_ecdh_tmp;
2162 }
2163 else
2164 {
2165 /* Get the Server Public Key from Cert */
2166 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2167 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2168 if ((srvr_pub_pkey == NULL) ||
2169 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2170 (srvr_pub_pkey->pkey.ec == NULL))
2171 {
2172 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2173 ERR_R_INTERNAL_ERROR);
2174 goto err;
2175 }
2176
2177 tkey = srvr_pub_pkey->pkey.ec;
2178 }
2179
2180 srvr_group = EC_KEY_get0_group(tkey);
2181 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2182
2183 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2184 {
2185 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2186 ERR_R_INTERNAL_ERROR);
2187 goto err;
2188 }
2189
2190 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2191 {
2192 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2193 goto err;
2194 }
2195
2196 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2197 {
2198 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2199 goto err;
2200 }
2201 if (ecdh_clnt_cert)
2202 {
2203 /* Reuse key info from our certificate
2204 * We only need our private key to perform
2205 * the ECDH computation.
2206 */
2207 const BIGNUM *priv_key;
2208 tkey = s->cert->key->privatekey->pkey.ec;
2209 priv_key = EC_KEY_get0_private_key(tkey);
2210 if (priv_key == NULL)
2211 {
2212 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2213 goto err;
2214 }
2215 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2216 {
2217 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2218 goto err;
2219 }
2220 }
2221 else
2222 {
2223 /* Generate a new ECDH key pair */
2224 if (!(EC_KEY_generate_key(clnt_ecdh)))
2225 {
2226 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2227 goto err;
2228 }
2229 }
2230
2231 /* use the 'p' output buffer for the ECDH key, but
2232 * make sure to clear it out afterwards
2233 */
2234
2235 field_size = EC_GROUP_get_degree(srvr_group);
2236 if (field_size <= 0)
2237 {
2238 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2239 ERR_R_ECDH_LIB);
2240 goto err;
2241 }
2242 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2243 if (n <= 0)
2244 {
2245 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2246 ERR_R_ECDH_LIB);
2247 goto err;
2248 }
2249
2250 /* generate master key from the result */
2251 s->session->master_key_length = s->method->ssl3_enc \
2252 -> generate_master_secret(s,
2253 s->session->master_key,
2254 p, n);
2255
2256 memset(p, 0, n); /* clean up */
2257
2258 if (ecdh_clnt_cert)
2259 {
2260 /* Send empty client key exch message */
2261 n = 0;
2262 }
2263 else
2264 {
2265 /* First check the size of encoding and
2266 * allocate memory accordingly.
2267 */
2268 encoded_pt_len =
2269 EC_POINT_point2oct(srvr_group,
2270 EC_KEY_get0_public_key(clnt_ecdh),
2271 POINT_CONVERSION_UNCOMPRESSED,
2272 NULL, 0, NULL);
2273
2274 encodedPoint = (unsigned char *)
2275 OPENSSL_malloc(encoded_pt_len *
2276 sizeof(unsigned char));
2277 bn_ctx = BN_CTX_new();
2278 if ((encodedPoint == NULL) ||
2279 (bn_ctx == NULL))
2280 {
2281 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2282 goto err;
2283 }
2284
2285 /* Encode the public key */
2286 n = EC_POINT_point2oct(srvr_group,
2287 EC_KEY_get0_public_key(clnt_ecdh),
2288 POINT_CONVERSION_UNCOMPRESSED,
2289 encodedPoint, encoded_pt_len, bn_ctx);
2290
2291 *p = n; /* length of encoded point */
2292 /* Encoded point will be copied here */
2293 p += 1;
2294 /* copy the point */
2295 memcpy((unsigned char *)p, encodedPoint, n);
2296 /* increment n to account for length field */
2297 n += 1;
2298 }
2299
2300 /* Free allocated memory */
2301 BN_CTX_free(bn_ctx);
2302 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2303 if (clnt_ecdh != NULL)
2304 EC_KEY_free(clnt_ecdh);
2305 EVP_PKEY_free(srvr_pub_pkey);
2306 }
2307 #endif /* !OPENSSL_NO_ECDH */
2308 else
2309 {
2310 ssl3_send_alert(s, SSL3_AL_FATAL,
2311 SSL_AD_HANDSHAKE_FAILURE);
2312 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2313 ERR_R_INTERNAL_ERROR);
2314 goto err;
2315 }
2316
2317 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2318 l2n3(n,d);
2319
2320 s->state=SSL3_ST_CW_KEY_EXCH_B;
2321 /* number of bytes to write */
2322 s->init_num=n+4;
2323 s->init_off=0;
2324 }
2325
2326 /* SSL3_ST_CW_KEY_EXCH_B */
2327 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2328 err:
2329 #ifndef OPENSSL_NO_ECDH
2330 BN_CTX_free(bn_ctx);
2331 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2332 if (clnt_ecdh != NULL)
2333 EC_KEY_free(clnt_ecdh);
2334 EVP_PKEY_free(srvr_pub_pkey);
2335 #endif
2336 return(-1);
2337 }
2338
2339 int ssl3_send_client_verify(SSL *s)
2340 {
2341 unsigned char *p,*d;
2342 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2343 EVP_PKEY *pkey;
2344 #ifndef OPENSSL_NO_RSA
2345 unsigned u=0;
2346 #endif
2347 unsigned long n;
2348 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2349 int j;
2350 #endif
2351
2352 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2353 {
2354 d=(unsigned char *)s->init_buf->data;
2355 p= &(d[4]);
2356 pkey=s->cert->key->privatekey;
2357
2358 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2359 &(data[MD5_DIGEST_LENGTH]));
2360
2361 #ifndef OPENSSL_NO_RSA
2362 if (pkey->type == EVP_PKEY_RSA)
2363 {
2364 s->method->ssl3_enc->cert_verify_mac(s,
2365 &(s->s3->finish_dgst1),&(data[0]));
2366 if (RSA_sign(NID_md5_sha1, data,
2367 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2368 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2369 {
2370 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2371 goto err;
2372 }
2373 s2n(u,p);
2374 n=u+2;
2375 }
2376 else
2377 #endif
2378 #ifndef OPENSSL_NO_DSA
2379 if (pkey->type == EVP_PKEY_DSA)
2380 {
2381 if (!DSA_sign(pkey->save_type,
2382 &(data[MD5_DIGEST_LENGTH]),
2383 SHA_DIGEST_LENGTH,&(p[2]),
2384 (unsigned int *)&j,pkey->pkey.dsa))
2385 {
2386 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2387 goto err;
2388 }
2389 s2n(j,p);
2390 n=j+2;
2391 }
2392 else
2393 #endif
2394 #ifndef OPENSSL_NO_ECDSA
2395 if (pkey->type == EVP_PKEY_EC)
2396 {
2397 if (!ECDSA_sign(pkey->save_type,
2398 &(data[MD5_DIGEST_LENGTH]),
2399 SHA_DIGEST_LENGTH,&(p[2]),
2400 (unsigned int *)&j,pkey->pkey.ec))
2401 {
2402 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2403 ERR_R_ECDSA_LIB);
2404 goto err;
2405 }
2406 s2n(j,p);
2407 n=j+2;
2408 }
2409 else
2410 #endif
2411 {
2412 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2413 goto err;
2414 }
2415 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2416 l2n3(n,d);
2417
2418 s->state=SSL3_ST_CW_CERT_VRFY_B;
2419 s->init_num=(int)n+4;
2420 s->init_off=0;
2421 }
2422 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2423 err:
2424 return(-1);
2425 }
2426
2427 int ssl3_send_client_certificate(SSL *s)
2428 {
2429 X509 *x509=NULL;
2430 EVP_PKEY *pkey=NULL;
2431 int i;
2432 unsigned long l;
2433
2434 if (s->state == SSL3_ST_CW_CERT_A)
2435 {
2436 if ((s->cert == NULL) ||
2437 (s->cert->key->x509 == NULL) ||
2438 (s->cert->key->privatekey == NULL))
2439 s->state=SSL3_ST_CW_CERT_B;
2440 else
2441 s->state=SSL3_ST_CW_CERT_C;
2442 }
2443
2444 /* We need to get a client cert */
2445 if (s->state == SSL3_ST_CW_CERT_B)
2446 {
2447 /* If we get an error, we need to
2448 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2449 * We then get retied later */
2450 i=0;
2451 if (s->ctx->client_cert_cb != NULL)
2452 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2453 if (i < 0)
2454 {
2455 s->rwstate=SSL_X509_LOOKUP;
2456 return(-1);
2457 }
2458 s->rwstate=SSL_NOTHING;
2459 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2460 {
2461 s->state=SSL3_ST_CW_CERT_B;
2462 if ( !SSL_use_certificate(s,x509) ||
2463 !SSL_use_PrivateKey(s,pkey))
2464 i=0;
2465 }
2466 else if (i == 1)
2467 {
2468 i=0;
2469 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2470 }
2471
2472 if (x509 != NULL) X509_free(x509);
2473 if (pkey != NULL) EVP_PKEY_free(pkey);
2474 if (i == 0)
2475 {
2476 if (s->version == SSL3_VERSION)
2477 {
2478 s->s3->tmp.cert_req=0;
2479 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2480 return(1);
2481 }
2482 else
2483 {
2484 s->s3->tmp.cert_req=2;
2485 }
2486 }
2487
2488 /* Ok, we have a cert */
2489 s->state=SSL3_ST_CW_CERT_C;
2490 }
2491
2492 if (s->state == SSL3_ST_CW_CERT_C)
2493 {
2494 s->state=SSL3_ST_CW_CERT_D;
2495 l=ssl3_output_cert_chain(s,
2496 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2497 s->init_num=(int)l;
2498 s->init_off=0;
2499 }
2500 /* SSL3_ST_CW_CERT_D */
2501 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2502 }
2503
2504 #define has_bits(i,m) (((i)&(m)) == (m))
2505
2506 int ssl3_check_cert_and_algorithm(SSL *s)
2507 {
2508 int i,idx;
2509 long algs;
2510 EVP_PKEY *pkey=NULL;
2511 SESS_CERT *sc;
2512 #ifndef OPENSSL_NO_RSA
2513 RSA *rsa;
2514 #endif
2515 #ifndef OPENSSL_NO_DH
2516 DH *dh;
2517 #endif
2518
2519 sc=s->session->sess_cert;
2520
2521 algs=s->s3->tmp.new_cipher->algorithms;
2522
2523 /* we don't have a certificate */
2524 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2525 return(1);
2526
2527 if (sc == NULL)
2528 {
2529 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2530 goto err;
2531 }
2532
2533 #ifndef OPENSSL_NO_RSA
2534 rsa=s->session->sess_cert->peer_rsa_tmp;
2535 #endif
2536 #ifndef OPENSSL_NO_DH
2537 dh=s->session->sess_cert->peer_dh_tmp;
2538 #endif
2539
2540 /* This is the passed certificate */
2541
2542 idx=sc->peer_cert_type;
2543 #ifndef OPENSSL_NO_ECDH
2544 if (idx == SSL_PKEY_ECC)
2545 {
2546 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2547 s->s3->tmp.new_cipher) == 0)
2548 { /* check failed */
2549 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2550 goto f_err;
2551 }
2552 else
2553 {
2554 return 1;
2555 }
2556 }
2557 #endif
2558 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2559 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2560 EVP_PKEY_free(pkey);
2561
2562
2563 /* Check that we have a certificate if we require one */
2564 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2565 {
2566 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2567 goto f_err;
2568 }
2569 #ifndef OPENSSL_NO_DSA
2570 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2571 {
2572 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2573 goto f_err;
2574 }
2575 #endif
2576 #ifndef OPENSSL_NO_RSA
2577 if ((algs & SSL_kRSA) &&
2578 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2579 {
2580 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2581 goto f_err;
2582 }
2583 #endif
2584 #ifndef OPENSSL_NO_DH
2585 if ((algs & SSL_kEDH) &&
2586 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2587 {
2588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2589 goto f_err;
2590 }
2591 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2592 {
2593 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2594 goto f_err;
2595 }
2596 #ifndef OPENSSL_NO_DSA
2597 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2598 {
2599 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2600 goto f_err;
2601 }
2602 #endif
2603 #endif
2604
2605 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2606 {
2607 #ifndef OPENSSL_NO_RSA
2608 if (algs & SSL_kRSA)
2609 {
2610 if (rsa == NULL
2611 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2612 {
2613 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2614 goto f_err;
2615 }
2616 }
2617 else
2618 #endif
2619 #ifndef OPENSSL_NO_DH
2620 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2621 {
2622 if (dh == NULL
2623 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2624 {
2625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2626 goto f_err;
2627 }
2628 }
2629 else
2630 #endif
2631 {
2632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2633 goto f_err;
2634 }
2635 }
2636 return(1);
2637 f_err:
2638 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2639 err:
2640 return(0);
2641 }
2642
2643
2644 #ifndef OPENSSL_NO_ECDH
2645 /* This is the complement of nid2curve_id in s3_srvr.c. */
2646 static int curve_id2nid(int curve_id)
2647 {
2648 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2649 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2650 static int nid_list[26] =
2651 {
2652 0,
2653 NID_sect163k1, /* sect163k1 (1) */
2654 NID_sect163r1, /* sect163r1 (2) */
2655 NID_sect163r2, /* sect163r2 (3) */
2656 NID_sect193r1, /* sect193r1 (4) */
2657 NID_sect193r2, /* sect193r2 (5) */
2658 NID_sect233k1, /* sect233k1 (6) */
2659 NID_sect233r1, /* sect233r1 (7) */
2660 NID_sect239k1, /* sect239k1 (8) */
2661 NID_sect283k1, /* sect283k1 (9) */
2662 NID_sect283r1, /* sect283r1 (10) */
2663 NID_sect409k1, /* sect409k1 (11) */
2664 NID_sect409r1, /* sect409r1 (12) */
2665 NID_sect571k1, /* sect571k1 (13) */
2666 NID_sect571r1, /* sect571r1 (14) */
2667 NID_secp160k1, /* secp160k1 (15) */
2668 NID_secp160r1, /* secp160r1 (16) */
2669 NID_secp160r2, /* secp160r2 (17) */
2670 NID_secp192k1, /* secp192k1 (18) */
2671 NID_X9_62_prime192v1, /* secp192r1 (19) */
2672 NID_secp224k1, /* secp224k1 (20) */
2673 NID_secp224r1, /* secp224r1 (21) */
2674 NID_secp256k1, /* secp256k1 (22) */
2675 NID_X9_62_prime256v1, /* secp256r1 (23) */
2676 NID_secp384r1, /* secp384r1 (24) */
2677 NID_secp521r1 /* secp521r1 (25) */
2678 };
2679
2680 if ((curve_id < 1) || (curve_id > 25)) return 0;
2681
2682 return nid_list[curve_id];
2683 }
2684 #endif
2685
2686 /* Check to see if handshake is full or resumed. Usually this is just a
2687 * case of checking to see if a cache hit has occurred. In the case of
2688 * session tickets we have to check the next message to be sure.
2689 */
2690
2691 #ifndef OPENSSL_NO_TLSEXT
2692 static int ssl3_check_finished(SSL *s)
2693 {
2694 int ok;
2695 long n;
2696 /* If we have no ticket or session ID is non-zero length (a match of
2697 * a non-zero session length would never reach here) it cannot be a
2698 * resumed session.
2699 */
2700 if (!s->session->tlsext_tick || s->session->session_id_length)
2701 return 1;
2702 /* this function is called when we really expect a Certificate
2703 * message, so permit appropriate message length */
2704 n=s->method->ssl_get_message(s,
2705 SSL3_ST_CR_CERT_A,
2706 SSL3_ST_CR_CERT_B,
2707 -1,
2708 s->max_cert_list,
2709 &ok);
2710 if (!ok) return((int)n);
2711 s->s3->tmp.reuse_message = 1;
2712 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
2713 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2714 return 2;
2715
2716 return 1;
2717 }
2718 #endif
DragonFly BSD