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 #ifdef OPENSSL_FIPS
134 #include <openssl/fips.h>
135 #endif
136
137 #ifndef OPENSSL_NO_DH
138 #include <openssl/dh.h>
139 #endif
140 #include <openssl/bn.h>
141 #ifndef OPENSSL_NO_ENGINE
142 #include <openssl/engine.h>
143 #endif
144
145 static SSL_METHOD *ssl3_get_client_method(int ver);
146 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
147 #ifndef OPENSSL_NO_TLSEXT
148 static int ssl3_check_finished(SSL *s);
149 #endif
150
151 #ifndef OPENSSL_NO_ECDH
152 static int curve_id2nid(int curve_id);
153 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
154 #endif
155
ssl3_get_client_method(int ver)156 static SSL_METHOD *ssl3_get_client_method(int ver)
157 {
158 if (ver == SSL3_VERSION)
159 return(SSLv3_client_method());
160 else
161 return(NULL);
162 }
163
IMPLEMENT_ssl3_meth_func(SSLv3_client_method,ssl_undefined_function,ssl3_connect,ssl3_get_client_method)164 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
165 ssl_undefined_function,
166 ssl3_connect,
167 ssl3_get_client_method)
168
169 int ssl3_connect(SSL *s)
170 {
171 BUF_MEM *buf=NULL;
172 unsigned long Time=(unsigned long)time(NULL),l;
173 long num1;
174 void (*cb)(const SSL *ssl,int type,int val)=NULL;
175 int ret= -1;
176 int new_state,state,skip=0;
177
178 RAND_add(&Time,sizeof(Time),0);
179 ERR_clear_error();
180 clear_sys_error();
181
182 if (s->info_callback != NULL)
183 cb=s->info_callback;
184 else if (s->ctx->info_callback != NULL)
185 cb=s->ctx->info_callback;
186
187 s->in_handshake++;
188 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
189
190 for (;;)
191 {
192 state=s->state;
193
194 switch(s->state)
195 {
196 case SSL_ST_RENEGOTIATE:
197 s->new_session=1;
198 s->state=SSL_ST_CONNECT;
199 s->ctx->stats.sess_connect_renegotiate++;
200 /* break */
201 case SSL_ST_BEFORE:
202 case SSL_ST_CONNECT:
203 case SSL_ST_BEFORE|SSL_ST_CONNECT:
204 case SSL_ST_OK|SSL_ST_CONNECT:
205
206 s->server=0;
207 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
208
209 if ((s->version & 0xff00 ) != 0x0300)
210 {
211 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
212 ret = -1;
213 goto end;
214 }
215
216 /* s->version=SSL3_VERSION; */
217 s->type=SSL_ST_CONNECT;
218
219 if (s->init_buf == NULL)
220 {
221 if ((buf=BUF_MEM_new()) == NULL)
222 {
223 ret= -1;
224 goto end;
225 }
226 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
227 {
228 ret= -1;
229 goto end;
230 }
231 s->init_buf=buf;
232 buf=NULL;
233 }
234
235 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
236
237 /* setup buffing BIO */
238 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
239
240 /* don't push the buffering BIO quite yet */
241
242 ssl3_init_finished_mac(s);
243
244 s->state=SSL3_ST_CW_CLNT_HELLO_A;
245 s->ctx->stats.sess_connect++;
246 s->init_num=0;
247 break;
248
249 case SSL3_ST_CW_CLNT_HELLO_A:
250 case SSL3_ST_CW_CLNT_HELLO_B:
251
252 s->shutdown=0;
253 ret=ssl3_client_hello(s);
254 if (ret <= 0) goto end;
255 s->state=SSL3_ST_CR_SRVR_HELLO_A;
256 s->init_num=0;
257
258 /* turn on buffering for the next lot of output */
259 if (s->bbio != s->wbio)
260 s->wbio=BIO_push(s->bbio,s->wbio);
261
262 break;
263
264 case SSL3_ST_CR_SRVR_HELLO_A:
265 case SSL3_ST_CR_SRVR_HELLO_B:
266 ret=ssl3_get_server_hello(s);
267 if (ret <= 0) goto end;
268 if (s->hit)
269 s->state=SSL3_ST_CR_FINISHED_A;
270 else
271 s->state=SSL3_ST_CR_CERT_A;
272 s->init_num=0;
273 break;
274
275 case SSL3_ST_CR_CERT_A:
276 case SSL3_ST_CR_CERT_B:
277 #ifndef OPENSSL_NO_TLSEXT
278 ret=ssl3_check_finished(s);
279 if (ret <= 0) goto end;
280 if (ret == 2)
281 {
282 s->hit = 1;
283 if (s->tlsext_ticket_expected)
284 s->state=SSL3_ST_CR_SESSION_TICKET_A;
285 else
286 s->state=SSL3_ST_CR_FINISHED_A;
287 s->init_num=0;
288 break;
289 }
290 #endif
291 /* Check if it is anon DH/ECDH */
292 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
293 {
294 ret=ssl3_get_server_certificate(s);
295 if (ret <= 0) goto end;
296 #ifndef OPENSSL_NO_TLSEXT
297 if (s->tlsext_status_expected)
298 s->state=SSL3_ST_CR_CERT_STATUS_A;
299 else
300 s->state=SSL3_ST_CR_KEY_EXCH_A;
301 }
302 else
303 {
304 skip = 1;
305 s->state=SSL3_ST_CR_KEY_EXCH_A;
306 }
307 #else
308 }
309 else
310 skip=1;
311
312 s->state=SSL3_ST_CR_KEY_EXCH_A;
313 #endif
314 s->init_num=0;
315 break;
316
317 case SSL3_ST_CR_KEY_EXCH_A:
318 case SSL3_ST_CR_KEY_EXCH_B:
319 ret=ssl3_get_key_exchange(s);
320 if (ret <= 0) goto end;
321 s->state=SSL3_ST_CR_CERT_REQ_A;
322 s->init_num=0;
323
324 /* at this point we check that we have the
325 * required stuff from the server */
326 if (!ssl3_check_cert_and_algorithm(s))
327 {
328 ret= -1;
329 goto end;
330 }
331 break;
332
333 case SSL3_ST_CR_CERT_REQ_A:
334 case SSL3_ST_CR_CERT_REQ_B:
335 ret=ssl3_get_certificate_request(s);
336 if (ret <= 0) goto end;
337 s->state=SSL3_ST_CR_SRVR_DONE_A;
338 s->init_num=0;
339 break;
340
341 case SSL3_ST_CR_SRVR_DONE_A:
342 case SSL3_ST_CR_SRVR_DONE_B:
343 ret=ssl3_get_server_done(s);
344 if (ret <= 0) goto end;
345 if (s->s3->tmp.cert_req)
346 s->state=SSL3_ST_CW_CERT_A;
347 else
348 s->state=SSL3_ST_CW_KEY_EXCH_A;
349 s->init_num=0;
350
351 break;
352
353 case SSL3_ST_CW_CERT_A:
354 case SSL3_ST_CW_CERT_B:
355 case SSL3_ST_CW_CERT_C:
356 case SSL3_ST_CW_CERT_D:
357 ret=ssl3_send_client_certificate(s);
358 if (ret <= 0) goto end;
359 s->state=SSL3_ST_CW_KEY_EXCH_A;
360 s->init_num=0;
361 break;
362
363 case SSL3_ST_CW_KEY_EXCH_A:
364 case SSL3_ST_CW_KEY_EXCH_B:
365 ret=ssl3_send_client_key_exchange(s);
366 if (ret <= 0) goto end;
367 l=s->s3->tmp.new_cipher->algorithms;
368 /* EAY EAY EAY need to check for DH fix cert
369 * sent back */
370 /* For TLS, cert_req is set to 2, so a cert chain
371 * of nothing is sent, but no verify packet is sent */
372 /* XXX: For now, we do not support client
373 * authentication in ECDH cipher suites with
374 * ECDH (rather than ECDSA) certificates.
375 * We need to skip the certificate verify
376 * message when client's ECDH public key is sent
377 * inside the client certificate.
378 */
379 if (s->s3->tmp.cert_req == 1)
380 {
381 s->state=SSL3_ST_CW_CERT_VRFY_A;
382 }
383 else
384 {
385 s->state=SSL3_ST_CW_CHANGE_A;
386 s->s3->change_cipher_spec=0;
387 }
388
389 s->init_num=0;
390 break;
391
392 case SSL3_ST_CW_CERT_VRFY_A:
393 case SSL3_ST_CW_CERT_VRFY_B:
394 ret=ssl3_send_client_verify(s);
395 if (ret <= 0) goto end;
396 s->state=SSL3_ST_CW_CHANGE_A;
397 s->init_num=0;
398 s->s3->change_cipher_spec=0;
399 break;
400
401 case SSL3_ST_CW_CHANGE_A:
402 case SSL3_ST_CW_CHANGE_B:
403 ret=ssl3_send_change_cipher_spec(s,
404 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
405 if (ret <= 0) goto end;
406 s->state=SSL3_ST_CW_FINISHED_A;
407 s->init_num=0;
408
409 s->session->cipher=s->s3->tmp.new_cipher;
410 #ifdef OPENSSL_NO_COMP
411 s->session->compress_meth=0;
412 #else
413 if (s->s3->tmp.new_compression == NULL)
414 s->session->compress_meth=0;
415 else
416 s->session->compress_meth=
417 s->s3->tmp.new_compression->id;
418 #endif
419 if (!s->method->ssl3_enc->setup_key_block(s))
420 {
421 ret= -1;
422 goto end;
423 }
424
425 if (!s->method->ssl3_enc->change_cipher_state(s,
426 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
427 {
428 ret= -1;
429 goto end;
430 }
431
432 break;
433
434 case SSL3_ST_CW_FINISHED_A:
435 case SSL3_ST_CW_FINISHED_B:
436 ret=ssl3_send_finished(s,
437 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
438 s->method->ssl3_enc->client_finished_label,
439 s->method->ssl3_enc->client_finished_label_len);
440 if (ret <= 0) goto end;
441 s->state=SSL3_ST_CW_FLUSH;
442
443 /* clear flags */
444 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
445 if (s->hit)
446 {
447 s->s3->tmp.next_state=SSL_ST_OK;
448 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
449 {
450 s->state=SSL_ST_OK;
451 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
452 s->s3->delay_buf_pop_ret=0;
453 }
454 }
455 else
456 {
457 #ifndef OPENSSL_NO_TLSEXT
458 /* Allow NewSessionTicket if ticket expected */
459 if (s->tlsext_ticket_expected)
460 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
461 else
462 #endif
463
464 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
465 }
466 s->init_num=0;
467 break;
468
469 #ifndef OPENSSL_NO_TLSEXT
470 case SSL3_ST_CR_SESSION_TICKET_A:
471 case SSL3_ST_CR_SESSION_TICKET_B:
472 ret=ssl3_get_new_session_ticket(s);
473 if (ret <= 0) goto end;
474 s->state=SSL3_ST_CR_FINISHED_A;
475 s->init_num=0;
476 break;
477
478 case SSL3_ST_CR_CERT_STATUS_A:
479 case SSL3_ST_CR_CERT_STATUS_B:
480 ret=ssl3_get_cert_status(s);
481 if (ret <= 0) goto end;
482 s->state=SSL3_ST_CR_KEY_EXCH_A;
483 s->init_num=0;
484 break;
485 #endif
486
487 case SSL3_ST_CR_FINISHED_A:
488 case SSL3_ST_CR_FINISHED_B:
489
490 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
491 SSL3_ST_CR_FINISHED_B);
492 if (ret <= 0) goto end;
493
494 if (s->hit)
495 s->state=SSL3_ST_CW_CHANGE_A;
496 else
497 s->state=SSL_ST_OK;
498 s->init_num=0;
499 break;
500
501 case SSL3_ST_CW_FLUSH:
502 /* number of bytes to be flushed */
503 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
504 if (num1 > 0)
505 {
506 s->rwstate=SSL_WRITING;
507 num1=BIO_flush(s->wbio);
508 if (num1 <= 0) { ret= -1; goto end; }
509 s->rwstate=SSL_NOTHING;
510 }
511
512 s->state=s->s3->tmp.next_state;
513 break;
514
515 case SSL_ST_OK:
516 /* clean a few things up */
517 ssl3_cleanup_key_block(s);
518
519 if (s->init_buf != NULL)
520 {
521 BUF_MEM_free(s->init_buf);
522 s->init_buf=NULL;
523 }
524
525 /* If we are not 'joining' the last two packets,
526 * remove the buffering now */
527 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
528 ssl_free_wbio_buffer(s);
529 /* else do it later in ssl3_write */
530
531 s->init_num=0;
532 s->new_session=0;
533
534 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
535 if (s->hit) s->ctx->stats.sess_hit++;
536
537 ret=1;
538 /* s->server=0; */
539 s->handshake_func=ssl3_connect;
540 s->ctx->stats.sess_connect_good++;
541
542 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
543
544 goto end;
545 /* break; */
546
547 default:
548 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
549 ret= -1;
550 goto end;
551 /* break; */
552 }
553
554 /* did we do anything */
555 if (!s->s3->tmp.reuse_message && !skip)
556 {
557 if (s->debug)
558 {
559 if ((ret=BIO_flush(s->wbio)) <= 0)
560 goto end;
561 }
562
563 if ((cb != NULL) && (s->state != state))
564 {
565 new_state=s->state;
566 s->state=state;
567 cb(s,SSL_CB_CONNECT_LOOP,1);
568 s->state=new_state;
569 }
570 }
571 skip=0;
572 }
573 end:
574 s->in_handshake--;
575 if (buf != NULL)
576 BUF_MEM_free(buf);
577 if (cb != NULL)
578 cb(s,SSL_CB_CONNECT_EXIT,ret);
579 return(ret);
580 }
581
582
ssl3_client_hello(SSL * s)583 int ssl3_client_hello(SSL *s)
584 {
585 unsigned char *buf;
586 unsigned char *p,*d;
587 int i;
588 unsigned long Time,l;
589 #ifndef OPENSSL_NO_COMP
590 int j;
591 SSL_COMP *comp;
592 #endif
593
594 buf=(unsigned char *)s->init_buf->data;
595 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
596 {
597 if ((s->session == NULL) ||
598 (s->session->ssl_version != s->version) ||
599 (s->session->not_resumable))
600 {
601 if (!ssl_get_new_session(s,0))
602 goto err;
603 }
604 /* else use the pre-loaded session */
605
606 p=s->s3->client_random;
607 Time=(unsigned long)time(NULL); /* Time */
608 l2n(Time,p);
609 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
610 goto err;
611
612 /* Do the message type and length last */
613 d=p= &(buf[4]);
614
615 *(p++)=s->version>>8;
616 *(p++)=s->version&0xff;
617 s->client_version=s->version;
618
619 /* Random stuff */
620 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
621 p+=SSL3_RANDOM_SIZE;
622
623 /* Session ID */
624 if (s->new_session)
625 i=0;
626 else
627 i=s->session->session_id_length;
628 *(p++)=i;
629 if (i != 0)
630 {
631 if (i > (int)sizeof(s->session->session_id))
632 {
633 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
634 goto err;
635 }
636 memcpy(p,s->session->session_id,i);
637 p+=i;
638 }
639
640 /* Ciphers supported */
641 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
642 if (i == 0)
643 {
644 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
645 goto err;
646 }
647 s2n(i,p);
648 p+=i;
649
650 /* COMPRESSION */
651 #ifdef OPENSSL_NO_COMP
652 *(p++)=1;
653 #else
654 if (s->ctx->comp_methods == NULL)
655 j=0;
656 else
657 j=sk_SSL_COMP_num(s->ctx->comp_methods);
658 *(p++)=1+j;
659 for (i=0; i<j; i++)
660 {
661 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
662 *(p++)=comp->id;
663 }
664 #endif
665 *(p++)=0; /* Add the NULL method */
666 #ifndef OPENSSL_NO_TLSEXT
667 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
668 {
669 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
670 goto err;
671 }
672 #endif
673 l=(p-d);
674 d=buf;
675 *(d++)=SSL3_MT_CLIENT_HELLO;
676 l2n3(l,d);
677
678 s->state=SSL3_ST_CW_CLNT_HELLO_B;
679 /* number of bytes to write */
680 s->init_num=p-buf;
681 s->init_off=0;
682 }
683
684 /* SSL3_ST_CW_CLNT_HELLO_B */
685 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
686 err:
687 return(-1);
688 }
689
ssl3_get_server_hello(SSL * s)690 int ssl3_get_server_hello(SSL *s)
691 {
692 STACK_OF(SSL_CIPHER) *sk;
693 SSL_CIPHER *c;
694 unsigned char *p,*d;
695 int i,al,ok;
696 unsigned int j;
697 long n;
698 #ifndef OPENSSL_NO_COMP
699 SSL_COMP *comp;
700 #endif
701
702 n=s->method->ssl_get_message(s,
703 SSL3_ST_CR_SRVR_HELLO_A,
704 SSL3_ST_CR_SRVR_HELLO_B,
705 -1,
706 20000, /* ?? */
707 &ok);
708
709 if (!ok) return((int)n);
710
711 if ( SSL_version(s) == DTLS1_VERSION)
712 {
713 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
714 {
715 if ( s->d1->send_cookie == 0)
716 {
717 s->s3->tmp.reuse_message = 1;
718 return 1;
719 }
720 else /* already sent a cookie */
721 {
722 al=SSL_AD_UNEXPECTED_MESSAGE;
723 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
724 goto f_err;
725 }
726 }
727 }
728
729 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
730 {
731 al=SSL_AD_UNEXPECTED_MESSAGE;
732 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
733 goto f_err;
734 }
735
736 d=p=(unsigned char *)s->init_msg;
737
738 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
739 {
740 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
741 s->version=(s->version&0xff00)|p[1];
742 al=SSL_AD_PROTOCOL_VERSION;
743 goto f_err;
744 }
745 p+=2;
746
747 /* load the server hello data */
748 /* load the server random */
749 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
750 p+=SSL3_RANDOM_SIZE;
751
752 /* get the session-id */
753 j= *(p++);
754
755 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
756 {
757 al=SSL_AD_ILLEGAL_PARAMETER;
758 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
759 goto f_err;
760 }
761
762 if (j != 0 && j == s->session->session_id_length
763 && memcmp(p,s->session->session_id,j) == 0)
764 {
765 if(s->sid_ctx_length != s->session->sid_ctx_length
766 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
767 {
768 /* actually a client application bug */
769 al=SSL_AD_ILLEGAL_PARAMETER;
770 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
771 goto f_err;
772 }
773 s->hit=1;
774 }
775 else /* a miss or crap from the other end */
776 {
777 /* If we were trying for session-id reuse, make a new
778 * SSL_SESSION so we don't stuff up other people */
779 s->hit=0;
780 if (s->session->session_id_length > 0)
781 {
782 if (!ssl_get_new_session(s,0))
783 {
784 al=SSL_AD_INTERNAL_ERROR;
785 goto f_err;
786 }
787 }
788 s->session->session_id_length=j;
789 memcpy(s->session->session_id,p,j); /* j could be 0 */
790 }
791 p+=j;
792 c=ssl_get_cipher_by_char(s,p);
793 if (c == NULL)
794 {
795 /* unknown cipher */
796 al=SSL_AD_ILLEGAL_PARAMETER;
797 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
798 goto f_err;
799 }
800 p+=ssl_put_cipher_by_char(s,NULL,NULL);
801
802 sk=ssl_get_ciphers_by_id(s);
803 i=sk_SSL_CIPHER_find(sk,c);
804 if (i < 0)
805 {
806 /* we did not say we would use this cipher */
807 al=SSL_AD_ILLEGAL_PARAMETER;
808 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
809 goto f_err;
810 }
811
812 /* Depending on the session caching (internal/external), the cipher
813 and/or cipher_id values may not be set. Make sure that
814 cipher_id is set and use it for comparison. */
815 if (s->session->cipher)
816 s->session->cipher_id = s->session->cipher->id;
817 if (s->hit && (s->session->cipher_id != c->id))
818 {
819 if (!(s->options &
820 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
821 {
822 al=SSL_AD_ILLEGAL_PARAMETER;
823 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
824 goto f_err;
825 }
826 }
827 s->s3->tmp.new_cipher=c;
828
829 /* lets get the compression algorithm */
830 /* COMPRESSION */
831 #ifdef OPENSSL_NO_COMP
832 if (*(p++) != 0)
833 {
834 al=SSL_AD_ILLEGAL_PARAMETER;
835 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
836 goto f_err;
837 }
838 #else
839 j= *(p++);
840 if (j == 0)
841 comp=NULL;
842 else
843 comp=ssl3_comp_find(s->ctx->comp_methods,j);
844
845 if ((j != 0) && (comp == NULL))
846 {
847 al=SSL_AD_ILLEGAL_PARAMETER;
848 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
849 goto f_err;
850 }
851 else
852 {
853 s->s3->tmp.new_compression=comp;
854 }
855 #endif
856 #ifndef OPENSSL_NO_TLSEXT
857 /* TLS extensions*/
858 if (s->version > SSL3_VERSION)
859 {
860 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
861 {
862 /* 'al' set by ssl_parse_serverhello_tlsext */
863 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
864 goto f_err;
865 }
866 if (ssl_check_serverhello_tlsext(s) <= 0)
867 {
868 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
869 goto err;
870 }
871 }
872 #endif
873
874
875 if (p != (d+n))
876 {
877 /* wrong packet length */
878 al=SSL_AD_DECODE_ERROR;
879 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
880 goto err;
881 }
882
883 return(1);
884 f_err:
885 ssl3_send_alert(s,SSL3_AL_FATAL,al);
886 err:
887 return(-1);
888 }
889
ssl3_get_server_certificate(SSL * s)890 int ssl3_get_server_certificate(SSL *s)
891 {
892 int al,i,ok,ret= -1;
893 unsigned long n,nc,llen,l;
894 X509 *x=NULL;
895 const unsigned char *q,*p;
896 unsigned char *d;
897 STACK_OF(X509) *sk=NULL;
898 SESS_CERT *sc;
899 EVP_PKEY *pkey=NULL;
900 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
901
902 n=s->method->ssl_get_message(s,
903 SSL3_ST_CR_CERT_A,
904 SSL3_ST_CR_CERT_B,
905 -1,
906 s->max_cert_list,
907 &ok);
908
909 if (!ok) return((int)n);
910
911 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
912 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) &&
913 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
914 {
915 s->s3->tmp.reuse_message=1;
916 return(1);
917 }
918
919 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
920 {
921 al=SSL_AD_UNEXPECTED_MESSAGE;
922 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
923 goto f_err;
924 }
925 p=d=(unsigned char *)s->init_msg;
926
927 if ((sk=sk_X509_new_null()) == NULL)
928 {
929 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
930 goto err;
931 }
932
933 n2l3(p,llen);
934 if (llen+3 != n)
935 {
936 al=SSL_AD_DECODE_ERROR;
937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
938 goto f_err;
939 }
940 for (nc=0; nc<llen; )
941 {
942 n2l3(p,l);
943 if ((l+nc+3) > llen)
944 {
945 al=SSL_AD_DECODE_ERROR;
946 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
947 goto f_err;
948 }
949
950 q=p;
951 x=d2i_X509(NULL,&q,l);
952 if (x == NULL)
953 {
954 al=SSL_AD_BAD_CERTIFICATE;
955 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
956 goto f_err;
957 }
958 if (q != (p+l))
959 {
960 al=SSL_AD_DECODE_ERROR;
961 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
962 goto f_err;
963 }
964 if (!sk_X509_push(sk,x))
965 {
966 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
967 goto err;
968 }
969 x=NULL;
970 nc+=l+3;
971 p=q;
972 }
973
974 i=ssl_verify_cert_chain(s,sk);
975 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
976 #ifndef OPENSSL_NO_KRB5
977 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
978 != (SSL_aKRB5|SSL_kKRB5)
979 #endif /* OPENSSL_NO_KRB5 */
980 )
981 {
982 al=ssl_verify_alarm_type(s->verify_result);
983 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
984 goto f_err;
985 }
986 ERR_clear_error(); /* but we keep s->verify_result */
987
988 sc=ssl_sess_cert_new();
989 if (sc == NULL) goto err;
990
991 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
992 s->session->sess_cert=sc;
993
994 sc->cert_chain=sk;
995 /* Inconsistency alert: cert_chain does include the peer's
996 * certificate, which we don't include in s3_srvr.c */
997 x=sk_X509_value(sk,0);
998 sk=NULL;
999 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1000
1001 pkey=X509_get_pubkey(x);
1002
1003 /* VRS: allow null cert if auth == KRB5 */
1004 need_cert = ((s->s3->tmp.new_cipher->algorithms
1005 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
1006 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
1007
1008 #ifdef KSSL_DEBUG
1009 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x);
1010 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1011 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
1012 s->s3->tmp.new_cipher->algorithms, need_cert);
1013 #endif /* KSSL_DEBUG */
1014
1015 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1016 {
1017 x=NULL;
1018 al=SSL3_AL_FATAL;
1019 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1020 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1021 goto f_err;
1022 }
1023
1024 i=ssl_cert_type(x,pkey);
1025 if (need_cert && i < 0)
1026 {
1027 x=NULL;
1028 al=SSL3_AL_FATAL;
1029 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1030 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1031 goto f_err;
1032 }
1033
1034 if (need_cert)
1035 {
1036 sc->peer_cert_type=i;
1037 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1038 /* Why would the following ever happen?
1039 * We just created sc a couple of lines ago. */
1040 if (sc->peer_pkeys[i].x509 != NULL)
1041 X509_free(sc->peer_pkeys[i].x509);
1042 sc->peer_pkeys[i].x509=x;
1043 sc->peer_key= &(sc->peer_pkeys[i]);
1044
1045 if (s->session->peer != NULL)
1046 X509_free(s->session->peer);
1047 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1048 s->session->peer=x;
1049 }
1050 else
1051 {
1052 sc->peer_cert_type=i;
1053 sc->peer_key= NULL;
1054
1055 if (s->session->peer != NULL)
1056 X509_free(s->session->peer);
1057 s->session->peer=NULL;
1058 }
1059 s->session->verify_result = s->verify_result;
1060
1061 x=NULL;
1062 ret=1;
1063
1064 if (0)
1065 {
1066 f_err:
1067 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1068 }
1069 err:
1070 EVP_PKEY_free(pkey);
1071 X509_free(x);
1072 sk_X509_pop_free(sk,X509_free);
1073 return(ret);
1074 }
1075
ssl3_get_key_exchange(SSL * s)1076 int ssl3_get_key_exchange(SSL *s)
1077 {
1078 #ifndef OPENSSL_NO_RSA
1079 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1080 #endif
1081 EVP_MD_CTX md_ctx;
1082 unsigned char *param,*p;
1083 int al,i,j,param_len,ok;
1084 long n,alg;
1085 EVP_PKEY *pkey=NULL;
1086 #ifndef OPENSSL_NO_RSA
1087 RSA *rsa=NULL;
1088 #endif
1089 #ifndef OPENSSL_NO_DH
1090 DH *dh=NULL;
1091 #endif
1092 #ifndef OPENSSL_NO_ECDH
1093 EC_KEY *ecdh = NULL;
1094 BN_CTX *bn_ctx = NULL;
1095 EC_POINT *srvr_ecpoint = NULL;
1096 int curve_nid = 0;
1097 int encoded_pt_len = 0;
1098 #endif
1099
1100 /* use same message size as in ssl3_get_certificate_request()
1101 * as ServerKeyExchange message may be skipped */
1102 n=s->method->ssl_get_message(s,
1103 SSL3_ST_CR_KEY_EXCH_A,
1104 SSL3_ST_CR_KEY_EXCH_B,
1105 -1,
1106 s->max_cert_list,
1107 &ok);
1108
1109 if (!ok) return((int)n);
1110
1111 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1112 {
1113 s->s3->tmp.reuse_message=1;
1114 return(1);
1115 }
1116
1117 param=p=(unsigned char *)s->init_msg;
1118
1119 if (s->session->sess_cert != NULL)
1120 {
1121 #ifndef OPENSSL_NO_RSA
1122 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1123 {
1124 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1125 s->session->sess_cert->peer_rsa_tmp=NULL;
1126 }
1127 #endif
1128 #ifndef OPENSSL_NO_DH
1129 if (s->session->sess_cert->peer_dh_tmp)
1130 {
1131 DH_free(s->session->sess_cert->peer_dh_tmp);
1132 s->session->sess_cert->peer_dh_tmp=NULL;
1133 }
1134 #endif
1135 #ifndef OPENSSL_NO_ECDH
1136 if (s->session->sess_cert->peer_ecdh_tmp)
1137 {
1138 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1139 s->session->sess_cert->peer_ecdh_tmp=NULL;
1140 }
1141 #endif
1142 }
1143 else
1144 {
1145 s->session->sess_cert=ssl_sess_cert_new();
1146 }
1147
1148 param_len=0;
1149 alg=s->s3->tmp.new_cipher->algorithms;
1150 EVP_MD_CTX_init(&md_ctx);
1151
1152 #ifndef OPENSSL_NO_RSA
1153 if (alg & SSL_kRSA)
1154 {
1155 if ((rsa=RSA_new()) == NULL)
1156 {
1157 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1158 goto err;
1159 }
1160 n2s(p,i);
1161 param_len=i+2;
1162 if (param_len > n)
1163 {
1164 al=SSL_AD_DECODE_ERROR;
1165 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1166 goto f_err;
1167 }
1168 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1169 {
1170 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1171 goto err;
1172 }
1173 p+=i;
1174
1175 n2s(p,i);
1176 param_len+=i+2;
1177 if (param_len > n)
1178 {
1179 al=SSL_AD_DECODE_ERROR;
1180 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1181 goto f_err;
1182 }
1183 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1184 {
1185 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1186 goto err;
1187 }
1188 p+=i;
1189 n-=param_len;
1190
1191 /* this should be because we are using an export cipher */
1192 if (alg & SSL_aRSA)
1193 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1194 else
1195 {
1196 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1197 goto err;
1198 }
1199 s->session->sess_cert->peer_rsa_tmp=rsa;
1200 rsa=NULL;
1201 }
1202 #else /* OPENSSL_NO_RSA */
1203 if (0)
1204 ;
1205 #endif
1206 #ifndef OPENSSL_NO_DH
1207 else if (alg & SSL_kEDH)
1208 {
1209 if ((dh=DH_new()) == NULL)
1210 {
1211 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1212 goto err;
1213 }
1214 n2s(p,i);
1215 param_len=i+2;
1216 if (param_len > n)
1217 {
1218 al=SSL_AD_DECODE_ERROR;
1219 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1220 goto f_err;
1221 }
1222 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1223 {
1224 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1225 goto err;
1226 }
1227 p+=i;
1228
1229 n2s(p,i);
1230 param_len+=i+2;
1231 if (param_len > n)
1232 {
1233 al=SSL_AD_DECODE_ERROR;
1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1235 goto f_err;
1236 }
1237 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1238 {
1239 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1240 goto err;
1241 }
1242 p+=i;
1243
1244 n2s(p,i);
1245 param_len+=i+2;
1246 if (param_len > n)
1247 {
1248 al=SSL_AD_DECODE_ERROR;
1249 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1250 goto f_err;
1251 }
1252 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1253 {
1254 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1255 goto err;
1256 }
1257 p+=i;
1258 n-=param_len;
1259
1260 #ifndef OPENSSL_NO_RSA
1261 if (alg & SSL_aRSA)
1262 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1263 #else
1264 if (0)
1265 ;
1266 #endif
1267 #ifndef OPENSSL_NO_DSA
1268 else if (alg & SSL_aDSS)
1269 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1270 #endif
1271 /* else anonymous DH, so no certificate or pkey. */
1272
1273 s->session->sess_cert->peer_dh_tmp=dh;
1274 dh=NULL;
1275 }
1276 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1277 {
1278 al=SSL_AD_ILLEGAL_PARAMETER;
1279 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1280 goto f_err;
1281 }
1282 #endif /* !OPENSSL_NO_DH */
1283
1284 #ifndef OPENSSL_NO_ECDH
1285 else if (alg & SSL_kECDHE)
1286 {
1287 EC_GROUP *ngroup;
1288 const EC_GROUP *group;
1289
1290 if ((ecdh=EC_KEY_new()) == NULL)
1291 {
1292 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1293 goto err;
1294 }
1295
1296 /* Extract elliptic curve parameters and the
1297 * server's ephemeral ECDH public key.
1298 * Keep accumulating lengths of various components in
1299 * param_len and make sure it never exceeds n.
1300 */
1301
1302 /* XXX: For now we only support named (not generic) curves
1303 * and the ECParameters in this case is just three bytes.
1304 */
1305 param_len=3;
1306 if ((param_len > n) ||
1307 (*p != NAMED_CURVE_TYPE) ||
1308 ((curve_nid = curve_id2nid(*(p + 2))) == 0))
1309 {
1310 al=SSL_AD_INTERNAL_ERROR;
1311 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1312 goto f_err;
1313 }
1314
1315 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1316 if (ngroup == NULL)
1317 {
1318 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1319 goto err;
1320 }
1321 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1322 {
1323 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1324 goto err;
1325 }
1326 EC_GROUP_free(ngroup);
1327
1328 group = EC_KEY_get0_group(ecdh);
1329
1330 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1331 (EC_GROUP_get_degree(group) > 163))
1332 {
1333 al=SSL_AD_EXPORT_RESTRICTION;
1334 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1335 goto f_err;
1336 }
1337
1338 p+=3;
1339
1340 /* Next, get the encoded ECPoint */
1341 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1342 ((bn_ctx = BN_CTX_new()) == NULL))
1343 {
1344 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1345 goto err;
1346 }
1347
1348 encoded_pt_len = *p; /* length of encoded point */
1349 p+=1;
1350 param_len += (1 + encoded_pt_len);
1351 if ((param_len > n) ||
1352 (EC_POINT_oct2point(group, srvr_ecpoint,
1353 p, encoded_pt_len, bn_ctx) == 0))
1354 {
1355 al=SSL_AD_DECODE_ERROR;
1356 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1357 goto f_err;
1358 }
1359
1360 n-=param_len;
1361 p+=encoded_pt_len;
1362
1363 /* The ECC/TLS specification does not mention
1364 * the use of DSA to sign ECParameters in the server
1365 * key exchange message. We do support RSA and ECDSA.
1366 */
1367 if (0) ;
1368 #ifndef OPENSSL_NO_RSA
1369 else if (alg & SSL_aRSA)
1370 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1371 #endif
1372 #ifndef OPENSSL_NO_ECDSA
1373 else if (alg & SSL_aECDSA)
1374 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1375 #endif
1376 /* else anonymous ECDH, so no certificate or pkey. */
1377 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1378 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1379 ecdh=NULL;
1380 BN_CTX_free(bn_ctx);
1381 EC_POINT_free(srvr_ecpoint);
1382 srvr_ecpoint = NULL;
1383 }
1384 else if (alg & SSL_kECDH)
1385 {
1386 al=SSL_AD_UNEXPECTED_MESSAGE;
1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1388 goto f_err;
1389 }
1390 #endif /* !OPENSSL_NO_ECDH */
1391 if (alg & SSL_aFZA)
1392 {
1393 al=SSL_AD_HANDSHAKE_FAILURE;
1394 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1395 goto f_err;
1396 }
1397
1398
1399 /* p points to the next byte, there are 'n' bytes left */
1400
1401 /* if it was signed, check the signature */
1402 if (pkey != NULL)
1403 {
1404 n2s(p,i);
1405 n-=2;
1406 j=EVP_PKEY_size(pkey);
1407
1408 if ((i != n) || (n > j) || (n <= 0))
1409 {
1410 /* wrong packet length */
1411 al=SSL_AD_DECODE_ERROR;
1412 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1413 goto f_err;
1414 }
1415
1416 #ifndef OPENSSL_NO_RSA
1417 if (pkey->type == EVP_PKEY_RSA)
1418 {
1419 int num;
1420
1421 j=0;
1422 q=md_buf;
1423 for (num=2; num > 0; num--)
1424 {
1425 EVP_MD_CTX_set_flags(&md_ctx,
1426 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1427 EVP_DigestInit_ex(&md_ctx,(num == 2)
1428 ?s->ctx->md5:s->ctx->sha1, NULL);
1429 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1430 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1431 EVP_DigestUpdate(&md_ctx,param,param_len);
1432 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1433 q+=i;
1434 j+=i;
1435 }
1436 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1437 pkey->pkey.rsa);
1438 if (i < 0)
1439 {
1440 al=SSL_AD_DECRYPT_ERROR;
1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1442 goto f_err;
1443 }
1444 if (i == 0)
1445 {
1446 /* bad signature */
1447 al=SSL_AD_DECRYPT_ERROR;
1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1449 goto f_err;
1450 }
1451 }
1452 else
1453 #endif
1454 #ifndef OPENSSL_NO_DSA
1455 if (pkey->type == EVP_PKEY_DSA)
1456 {
1457 /* lets do DSS */
1458 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1459 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1460 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1461 EVP_VerifyUpdate(&md_ctx,param,param_len);
1462 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1463 {
1464 /* bad signature */
1465 al=SSL_AD_DECRYPT_ERROR;
1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1467 goto f_err;
1468 }
1469 }
1470 else
1471 #endif
1472 #ifndef OPENSSL_NO_ECDSA
1473 if (pkey->type == EVP_PKEY_EC)
1474 {
1475 /* let's do ECDSA */
1476 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1477 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1478 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1479 EVP_VerifyUpdate(&md_ctx,param,param_len);
1480 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1481 {
1482 /* bad signature */
1483 al=SSL_AD_DECRYPT_ERROR;
1484 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1485 goto f_err;
1486 }
1487 }
1488 else
1489 #endif
1490 {
1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1492 goto err;
1493 }
1494 }
1495 else
1496 {
1497 /* still data left over */
1498 if (!(alg & SSL_aNULL))
1499 {
1500 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1501 goto err;
1502 }
1503 if (n != 0)
1504 {
1505 al=SSL_AD_DECODE_ERROR;
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1507 goto f_err;
1508 }
1509 }
1510 EVP_PKEY_free(pkey);
1511 EVP_MD_CTX_cleanup(&md_ctx);
1512 return(1);
1513 f_err:
1514 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1515 err:
1516 EVP_PKEY_free(pkey);
1517 #ifndef OPENSSL_NO_RSA
1518 if (rsa != NULL)
1519 RSA_free(rsa);
1520 #endif
1521 #ifndef OPENSSL_NO_DH
1522 if (dh != NULL)
1523 DH_free(dh);
1524 #endif
1525 #ifndef OPENSSL_NO_ECDH
1526 BN_CTX_free(bn_ctx);
1527 EC_POINT_free(srvr_ecpoint);
1528 if (ecdh != NULL)
1529 EC_KEY_free(ecdh);
1530 #endif
1531 EVP_MD_CTX_cleanup(&md_ctx);
1532 return(-1);
1533 }
1534
ssl3_get_certificate_request(SSL * s)1535 int ssl3_get_certificate_request(SSL *s)
1536 {
1537 int ok,ret=0;
1538 unsigned long n,nc,l;
1539 unsigned int llen,ctype_num,i;
1540 X509_NAME *xn=NULL;
1541 const unsigned char *p,*q;
1542 unsigned char *d;
1543 STACK_OF(X509_NAME) *ca_sk=NULL;
1544
1545 n=s->method->ssl_get_message(s,
1546 SSL3_ST_CR_CERT_REQ_A,
1547 SSL3_ST_CR_CERT_REQ_B,
1548 -1,
1549 s->max_cert_list,
1550 &ok);
1551
1552 if (!ok) return((int)n);
1553
1554 s->s3->tmp.cert_req=0;
1555
1556 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1557 {
1558 s->s3->tmp.reuse_message=1;
1559 return(1);
1560 }
1561
1562 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1563 {
1564 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1565 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1566 goto err;
1567 }
1568
1569 /* TLS does not like anon-DH with client cert */
1570 if (s->version > SSL3_VERSION)
1571 {
1572 l=s->s3->tmp.new_cipher->algorithms;
1573 if (l & SSL_aNULL)
1574 {
1575 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1576 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1577 goto err;
1578 }
1579 }
1580
1581 p=d=(unsigned char *)s->init_msg;
1582
1583 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1584 {
1585 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1586 goto err;
1587 }
1588
1589 /* get the certificate types */
1590 ctype_num= *(p++);
1591 if (ctype_num > SSL3_CT_NUMBER)
1592 ctype_num=SSL3_CT_NUMBER;
1593 for (i=0; i<ctype_num; i++)
1594 s->s3->tmp.ctype[i]= p[i];
1595 p+=ctype_num;
1596
1597 /* get the CA RDNs */
1598 n2s(p,llen);
1599 #if 0
1600 {
1601 FILE *out;
1602 out=fopen("/tmp/vsign.der","w");
1603 fwrite(p,1,llen,out);
1604 fclose(out);
1605 }
1606 #endif
1607
1608 if ((llen+ctype_num+2+1) != n)
1609 {
1610 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1611 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1612 goto err;
1613 }
1614
1615 for (nc=0; nc<llen; )
1616 {
1617 n2s(p,l);
1618 if ((l+nc+2) > llen)
1619 {
1620 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1621 goto cont; /* netscape bugs */
1622 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1623 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1624 goto err;
1625 }
1626
1627 q=p;
1628
1629 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1630 {
1631 /* If netscape tolerance is on, ignore errors */
1632 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1633 goto cont;
1634 else
1635 {
1636 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1637 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1638 goto err;
1639 }
1640 }
1641
1642 if (q != (p+l))
1643 {
1644 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1645 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1646 goto err;
1647 }
1648 if (!sk_X509_NAME_push(ca_sk,xn))
1649 {
1650 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1651 goto err;
1652 }
1653
1654 p+=l;
1655 nc+=l+2;
1656 }
1657
1658 if (0)
1659 {
1660 cont:
1661 ERR_clear_error();
1662 }
1663
1664 /* we should setup a certificate to return.... */
1665 s->s3->tmp.cert_req=1;
1666 s->s3->tmp.ctype_num=ctype_num;
1667 if (s->s3->tmp.ca_names != NULL)
1668 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1669 s->s3->tmp.ca_names=ca_sk;
1670 ca_sk=NULL;
1671
1672 ret=1;
1673 err:
1674 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1675 return(ret);
1676 }
1677
ca_dn_cmp(const X509_NAME * const * a,const X509_NAME * const * b)1678 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1679 {
1680 return(X509_NAME_cmp(*a,*b));
1681 }
1682 #ifndef OPENSSL_NO_TLSEXT
ssl3_get_new_session_ticket(SSL * s)1683 int ssl3_get_new_session_ticket(SSL *s)
1684 {
1685 int ok,al,ret=0, ticklen;
1686 long n;
1687 const unsigned char *p;
1688 unsigned char *d;
1689
1690 n=s->method->ssl_get_message(s,
1691 SSL3_ST_CR_SESSION_TICKET_A,
1692 SSL3_ST_CR_SESSION_TICKET_B,
1693 -1,
1694 16384,
1695 &ok);
1696
1697 if (!ok)
1698 return((int)n);
1699
1700 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1701 {
1702 s->s3->tmp.reuse_message=1;
1703 return(1);
1704 }
1705 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1706 {
1707 al=SSL_AD_UNEXPECTED_MESSAGE;
1708 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1709 goto f_err;
1710 }
1711 if (n < 6)
1712 {
1713 /* need at least ticket_lifetime_hint + ticket length */
1714 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1715 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1716 goto f_err;
1717 }
1718 p=d=(unsigned char *)s->init_msg;
1719 n2l(p, s->session->tlsext_tick_lifetime_hint);
1720 n2s(p, ticklen);
1721 /* ticket_lifetime_hint + ticket_length + ticket */
1722 if (ticklen + 6 != n)
1723 {
1724 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1725 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1726 goto f_err;
1727 }
1728 if (s->session->tlsext_tick)
1729 {
1730 OPENSSL_free(s->session->tlsext_tick);
1731 s->session->tlsext_ticklen = 0;
1732 }
1733 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1734 if (!s->session->tlsext_tick)
1735 {
1736 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1737 goto err;
1738 }
1739 memcpy(s->session->tlsext_tick, p, ticklen);
1740 s->session->tlsext_ticklen = ticklen;
1741
1742 ret=1;
1743 return(ret);
1744 f_err:
1745 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1746 err:
1747 return(-1);
1748 }
1749
ssl3_get_cert_status(SSL * s)1750 int ssl3_get_cert_status(SSL *s)
1751 {
1752 int ok, al;
1753 unsigned long resplen;
1754 long n;
1755 const unsigned char *p;
1756
1757 n=s->method->ssl_get_message(s,
1758 SSL3_ST_CR_CERT_STATUS_A,
1759 SSL3_ST_CR_CERT_STATUS_B,
1760 SSL3_MT_CERTIFICATE_STATUS,
1761 16384,
1762 &ok);
1763
1764 if (!ok) return((int)n);
1765 if (n < 4)
1766 {
1767 /* need at least status type + length */
1768 al = SSL_AD_DECODE_ERROR;
1769 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1770 goto f_err;
1771 }
1772 p = (unsigned char *)s->init_msg;
1773 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1774 {
1775 al = SSL_AD_DECODE_ERROR;
1776 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1777 goto f_err;
1778 }
1779 n2l3(p, resplen);
1780 if (resplen + 4 != (unsigned long)n)
1781 {
1782 al = SSL_AD_DECODE_ERROR;
1783 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1784 goto f_err;
1785 }
1786 if (s->tlsext_ocsp_resp)
1787 OPENSSL_free(s->tlsext_ocsp_resp);
1788 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1789 if (!s->tlsext_ocsp_resp)
1790 {
1791 al = SSL_AD_INTERNAL_ERROR;
1792 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1793 goto f_err;
1794 }
1795 s->tlsext_ocsp_resplen = resplen;
1796 if (s->ctx->tlsext_status_cb)
1797 {
1798 int ret;
1799 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1800 if (ret == 0)
1801 {
1802 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1803 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1804 goto f_err;
1805 }
1806 if (ret < 0)
1807 {
1808 al = SSL_AD_INTERNAL_ERROR;
1809 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1810 goto f_err;
1811 }
1812 }
1813 return 1;
1814 f_err:
1815 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1816 return(-1);
1817 }
1818 #endif
1819
ssl3_get_server_done(SSL * s)1820 int ssl3_get_server_done(SSL *s)
1821 {
1822 int ok,ret=0;
1823 long n;
1824
1825 n=s->method->ssl_get_message(s,
1826 SSL3_ST_CR_SRVR_DONE_A,
1827 SSL3_ST_CR_SRVR_DONE_B,
1828 SSL3_MT_SERVER_DONE,
1829 30, /* should be very small, like 0 :-) */
1830 &ok);
1831
1832 if (!ok) return((int)n);
1833 if (n > 0)
1834 {
1835 /* should contain no data */
1836 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1837 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1838 return -1;
1839 }
1840 ret=1;
1841 return(ret);
1842 }
1843
1844
ssl3_send_client_key_exchange(SSL * s)1845 int ssl3_send_client_key_exchange(SSL *s)
1846 {
1847 unsigned char *p,*d;
1848 int n;
1849 unsigned long l;
1850 #ifndef OPENSSL_NO_RSA
1851 unsigned char *q;
1852 EVP_PKEY *pkey=NULL;
1853 #endif
1854 #ifndef OPENSSL_NO_KRB5
1855 KSSL_ERR kssl_err;
1856 #endif /* OPENSSL_NO_KRB5 */
1857 #ifndef OPENSSL_NO_ECDH
1858 EC_KEY *clnt_ecdh = NULL;
1859 const EC_POINT *srvr_ecpoint = NULL;
1860 EVP_PKEY *srvr_pub_pkey = NULL;
1861 unsigned char *encodedPoint = NULL;
1862 int encoded_pt_len = 0;
1863 BN_CTX * bn_ctx = NULL;
1864 #endif
1865
1866 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1867 {
1868 d=(unsigned char *)s->init_buf->data;
1869 p= &(d[4]);
1870
1871 l=s->s3->tmp.new_cipher->algorithms;
1872
1873 /* Fool emacs indentation */
1874 if (0) {}
1875 #ifndef OPENSSL_NO_RSA
1876 else if (l & SSL_kRSA)
1877 {
1878 RSA *rsa;
1879 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1880
1881 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1882 rsa=s->session->sess_cert->peer_rsa_tmp;
1883 else
1884 {
1885 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1886 if ((pkey == NULL) ||
1887 (pkey->type != EVP_PKEY_RSA) ||
1888 (pkey->pkey.rsa == NULL))
1889 {
1890 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1891 goto err;
1892 }
1893 rsa=pkey->pkey.rsa;
1894 EVP_PKEY_free(pkey);
1895 }
1896
1897 tmp_buf[0]=s->client_version>>8;
1898 tmp_buf[1]=s->client_version&0xff;
1899 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1900 goto err;
1901
1902 s->session->master_key_length=sizeof tmp_buf;
1903
1904 q=p;
1905 /* Fix buf for TLS and beyond */
1906 if (s->version > SSL3_VERSION)
1907 p+=2;
1908 n=RSA_public_encrypt(sizeof tmp_buf,
1909 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1910 #ifdef PKCS1_CHECK
1911 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1912 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1913 #endif
1914 if (n <= 0)
1915 {
1916 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1917 goto err;
1918 }
1919
1920 /* Fix buf for TLS and beyond */
1921 if (s->version > SSL3_VERSION)
1922 {
1923 s2n(n,q);
1924 n+=2;
1925 }
1926
1927 s->session->master_key_length=
1928 s->method->ssl3_enc->generate_master_secret(s,
1929 s->session->master_key,
1930 tmp_buf,sizeof tmp_buf);
1931 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1932 }
1933 #endif
1934 #ifndef OPENSSL_NO_KRB5
1935 else if (l & SSL_kKRB5)
1936 {
1937 krb5_error_code krb5rc;
1938 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1939 /* krb5_data krb5_ap_req; */
1940 krb5_data *enc_ticket;
1941 krb5_data authenticator, *authp = NULL;
1942 EVP_CIPHER_CTX ciph_ctx;
1943 EVP_CIPHER *enc = NULL;
1944 unsigned char iv[EVP_MAX_IV_LENGTH];
1945 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1946 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1947 + EVP_MAX_IV_LENGTH];
1948 int padl, outl = sizeof(epms);
1949
1950 EVP_CIPHER_CTX_init(&ciph_ctx);
1951
1952 #ifdef KSSL_DEBUG
1953 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1954 l, SSL_kKRB5);
1955 #endif /* KSSL_DEBUG */
1956
1957 authp = NULL;
1958 #ifdef KRB5SENDAUTH
1959 if (KRB5SENDAUTH) authp = &authenticator;
1960 #endif /* KRB5SENDAUTH */
1961
1962 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1963 &kssl_err);
1964 enc = kssl_map_enc(kssl_ctx->enctype);
1965 if (enc == NULL)
1966 goto err;
1967 #ifdef KSSL_DEBUG
1968 {
1969 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1970 if (krb5rc && kssl_err.text)
1971 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1972 }
1973 #endif /* KSSL_DEBUG */
1974
1975 if (krb5rc)
1976 {
1977 ssl3_send_alert(s,SSL3_AL_FATAL,
1978 SSL_AD_HANDSHAKE_FAILURE);
1979 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1980 kssl_err.reason);
1981 goto err;
1982 }
1983
1984 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1985 ** in place of RFC 2712 KerberosWrapper, as in:
1986 **
1987 ** Send ticket (copy to *p, set n = length)
1988 ** n = krb5_ap_req.length;
1989 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1990 ** if (krb5_ap_req.data)
1991 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1992 **
1993 ** Now using real RFC 2712 KerberosWrapper
1994 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1995 ** Note: 2712 "opaque" types are here replaced
1996 ** with a 2-byte length followed by the value.
1997 ** Example:
1998 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1999 ** Where "xx xx" = length bytes. Shown here with
2000 ** optional authenticator omitted.
2001 */
2002
2003 /* KerberosWrapper.Ticket */
2004 s2n(enc_ticket->length,p);
2005 memcpy(p, enc_ticket->data, enc_ticket->length);
2006 p+= enc_ticket->length;
2007 n = enc_ticket->length + 2;
2008
2009 /* KerberosWrapper.Authenticator */
2010 if (authp && authp->length)
2011 {
2012 s2n(authp->length,p);
2013 memcpy(p, authp->data, authp->length);
2014 p+= authp->length;
2015 n+= authp->length + 2;
2016
2017 free(authp->data);
2018 authp->data = NULL;
2019 authp->length = 0;
2020 }
2021 else
2022 {
2023 s2n(0,p);/* null authenticator length */
2024 n+=2;
2025 }
2026
2027 tmp_buf[0]=s->client_version>>8;
2028 tmp_buf[1]=s->client_version&0xff;
2029 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2030 goto err;
2031
2032 /* 20010420 VRS. Tried it this way; failed.
2033 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2034 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2035 ** kssl_ctx->length);
2036 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2037 */
2038
2039 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2040 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2041 kssl_ctx->key,iv);
2042 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2043 sizeof tmp_buf);
2044 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2045 outl += padl;
2046 if (outl > sizeof epms)
2047 {
2048 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2049 goto err;
2050 }
2051 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2052
2053 /* KerberosWrapper.EncryptedPreMasterSecret */
2054 s2n(outl,p);
2055 memcpy(p, epms, outl);
2056 p+=outl;
2057 n+=outl + 2;
2058
2059 s->session->master_key_length=
2060 s->method->ssl3_enc->generate_master_secret(s,
2061 s->session->master_key,
2062 tmp_buf, sizeof tmp_buf);
2063
2064 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2065 OPENSSL_cleanse(epms, outl);
2066 }
2067 #endif
2068 #ifndef OPENSSL_NO_DH
2069 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2070 {
2071 DH *dh_srvr,*dh_clnt;
2072
2073 if (s->session->sess_cert == NULL)
2074 {
2075 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2076 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2077 goto err;
2078 }
2079
2080 if (s->session->sess_cert->peer_dh_tmp != NULL)
2081 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2082 else
2083 {
2084 /* we get them from the cert */
2085 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2086 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2087 goto err;
2088 }
2089
2090 /* generate a new random key */
2091 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2092 {
2093 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2094 goto err;
2095 }
2096 if (!DH_generate_key(dh_clnt))
2097 {
2098 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2099 goto err;
2100 }
2101
2102 /* use the 'p' output buffer for the DH key, but
2103 * make sure to clear it out afterwards */
2104
2105 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2106
2107 if (n <= 0)
2108 {
2109 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2110 goto err;
2111 }
2112
2113 /* generate master key from the result */
2114 s->session->master_key_length=
2115 s->method->ssl3_enc->generate_master_secret(s,
2116 s->session->master_key,p,n);
2117 /* clean up */
2118 memset(p,0,n);
2119
2120 /* send off the data */
2121 n=BN_num_bytes(dh_clnt->pub_key);
2122 s2n(n,p);
2123 BN_bn2bin(dh_clnt->pub_key,p);
2124 n+=2;
2125
2126 DH_free(dh_clnt);
2127
2128 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2129 }
2130 #endif
2131
2132 #ifndef OPENSSL_NO_ECDH
2133 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
2134 {
2135 const EC_GROUP *srvr_group = NULL;
2136 EC_KEY *tkey;
2137 int ecdh_clnt_cert = 0;
2138 int field_size = 0;
2139
2140 /* Did we send out the client's
2141 * ECDH share for use in premaster
2142 * computation as part of client certificate?
2143 * If so, set ecdh_clnt_cert to 1.
2144 */
2145 if ((l & SSL_kECDH) && (s->cert != NULL))
2146 {
2147 /* XXX: For now, we do not support client
2148 * authentication using ECDH certificates.
2149 * To add such support, one needs to add
2150 * code that checks for appropriate
2151 * conditions and sets ecdh_clnt_cert to 1.
2152 * For example, the cert have an ECC
2153 * key on the same curve as the server's
2154 * and the key should be authorized for
2155 * key agreement.
2156 *
2157 * One also needs to add code in ssl3_connect
2158 * to skip sending the certificate verify
2159 * message.
2160 *
2161 * if ((s->cert->key->privatekey != NULL) &&
2162 * (s->cert->key->privatekey->type ==
2163 * EVP_PKEY_EC) && ...)
2164 * ecdh_clnt_cert = 1;
2165 */
2166 }
2167
2168 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2169 {
2170 tkey = s->session->sess_cert->peer_ecdh_tmp;
2171 }
2172 else
2173 {
2174 /* Get the Server Public Key from Cert */
2175 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2176 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2177 if ((srvr_pub_pkey == NULL) ||
2178 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2179 (srvr_pub_pkey->pkey.ec == NULL))
2180 {
2181 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2182 ERR_R_INTERNAL_ERROR);
2183 goto err;
2184 }
2185
2186 tkey = srvr_pub_pkey->pkey.ec;
2187 }
2188
2189 srvr_group = EC_KEY_get0_group(tkey);
2190 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2191
2192 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2193 {
2194 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2195 ERR_R_INTERNAL_ERROR);
2196 goto err;
2197 }
2198
2199 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2200 {
2201 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2202 goto err;
2203 }
2204
2205 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2206 {
2207 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2208 goto err;
2209 }
2210 if (ecdh_clnt_cert)
2211 {
2212 /* Reuse key info from our certificate
2213 * We only need our private key to perform
2214 * the ECDH computation.
2215 */
2216 const BIGNUM *priv_key;
2217 tkey = s->cert->key->privatekey->pkey.ec;
2218 priv_key = EC_KEY_get0_private_key(tkey);
2219 if (priv_key == NULL)
2220 {
2221 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2222 goto err;
2223 }
2224 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2225 {
2226 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2227 goto err;
2228 }
2229 }
2230 else
2231 {
2232 /* Generate a new ECDH key pair */
2233 if (!(EC_KEY_generate_key(clnt_ecdh)))
2234 {
2235 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2236 goto err;
2237 }
2238 }
2239
2240 /* use the 'p' output buffer for the ECDH key, but
2241 * make sure to clear it out afterwards
2242 */
2243
2244 field_size = EC_GROUP_get_degree(srvr_group);
2245 if (field_size <= 0)
2246 {
2247 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2248 ERR_R_ECDH_LIB);
2249 goto err;
2250 }
2251 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2252 if (n <= 0)
2253 {
2254 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2255 ERR_R_ECDH_LIB);
2256 goto err;
2257 }
2258
2259 /* generate master key from the result */
2260 s->session->master_key_length = s->method->ssl3_enc \
2261 -> generate_master_secret(s,
2262 s->session->master_key,
2263 p, n);
2264
2265 memset(p, 0, n); /* clean up */
2266
2267 if (ecdh_clnt_cert)
2268 {
2269 /* Send empty client key exch message */
2270 n = 0;
2271 }
2272 else
2273 {
2274 /* First check the size of encoding and
2275 * allocate memory accordingly.
2276 */
2277 encoded_pt_len =
2278 EC_POINT_point2oct(srvr_group,
2279 EC_KEY_get0_public_key(clnt_ecdh),
2280 POINT_CONVERSION_UNCOMPRESSED,
2281 NULL, 0, NULL);
2282
2283 encodedPoint = (unsigned char *)
2284 OPENSSL_malloc(encoded_pt_len *
2285 sizeof(unsigned char));
2286 bn_ctx = BN_CTX_new();
2287 if ((encodedPoint == NULL) ||
2288 (bn_ctx == NULL))
2289 {
2290 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2291 goto err;
2292 }
2293
2294 /* Encode the public key */
2295 n = EC_POINT_point2oct(srvr_group,
2296 EC_KEY_get0_public_key(clnt_ecdh),
2297 POINT_CONVERSION_UNCOMPRESSED,
2298 encodedPoint, encoded_pt_len, bn_ctx);
2299
2300 *p = n; /* length of encoded point */
2301 /* Encoded point will be copied here */
2302 p += 1;
2303 /* copy the point */
2304 memcpy((unsigned char *)p, encodedPoint, n);
2305 /* increment n to account for length field */
2306 n += 1;
2307 }
2308
2309 /* Free allocated memory */
2310 BN_CTX_free(bn_ctx);
2311 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2312 if (clnt_ecdh != NULL)
2313 EC_KEY_free(clnt_ecdh);
2314 EVP_PKEY_free(srvr_pub_pkey);
2315 }
2316 #endif /* !OPENSSL_NO_ECDH */
2317 else
2318 {
2319 ssl3_send_alert(s, SSL3_AL_FATAL,
2320 SSL_AD_HANDSHAKE_FAILURE);
2321 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2322 ERR_R_INTERNAL_ERROR);
2323 goto err;
2324 }
2325
2326 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2327 l2n3(n,d);
2328
2329 s->state=SSL3_ST_CW_KEY_EXCH_B;
2330 /* number of bytes to write */
2331 s->init_num=n+4;
2332 s->init_off=0;
2333 }
2334
2335 /* SSL3_ST_CW_KEY_EXCH_B */
2336 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2337 err:
2338 #ifndef OPENSSL_NO_ECDH
2339 BN_CTX_free(bn_ctx);
2340 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2341 if (clnt_ecdh != NULL)
2342 EC_KEY_free(clnt_ecdh);
2343 EVP_PKEY_free(srvr_pub_pkey);
2344 #endif
2345 return(-1);
2346 }
2347
ssl3_send_client_verify(SSL * s)2348 int ssl3_send_client_verify(SSL *s)
2349 {
2350 unsigned char *p,*d;
2351 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2352 EVP_PKEY *pkey;
2353 #ifndef OPENSSL_NO_RSA
2354 unsigned u=0;
2355 #endif
2356 unsigned long n;
2357 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2358 int j;
2359 #endif
2360
2361 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2362 {
2363 d=(unsigned char *)s->init_buf->data;
2364 p= &(d[4]);
2365 pkey=s->cert->key->privatekey;
2366
2367 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2368 &(data[MD5_DIGEST_LENGTH]));
2369
2370 #ifndef OPENSSL_NO_RSA
2371 if (pkey->type == EVP_PKEY_RSA)
2372 {
2373 s->method->ssl3_enc->cert_verify_mac(s,
2374 &(s->s3->finish_dgst1),&(data[0]));
2375 if (RSA_sign(NID_md5_sha1, data,
2376 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2377 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2378 {
2379 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2380 goto err;
2381 }
2382 s2n(u,p);
2383 n=u+2;
2384 }
2385 else
2386 #endif
2387 #ifndef OPENSSL_NO_DSA
2388 if (pkey->type == EVP_PKEY_DSA)
2389 {
2390 if (!DSA_sign(pkey->save_type,
2391 &(data[MD5_DIGEST_LENGTH]),
2392 SHA_DIGEST_LENGTH,&(p[2]),
2393 (unsigned int *)&j,pkey->pkey.dsa))
2394 {
2395 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2396 goto err;
2397 }
2398 s2n(j,p);
2399 n=j+2;
2400 }
2401 else
2402 #endif
2403 #ifndef OPENSSL_NO_ECDSA
2404 if (pkey->type == EVP_PKEY_EC)
2405 {
2406 if (!ECDSA_sign(pkey->save_type,
2407 &(data[MD5_DIGEST_LENGTH]),
2408 SHA_DIGEST_LENGTH,&(p[2]),
2409 (unsigned int *)&j,pkey->pkey.ec))
2410 {
2411 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2412 ERR_R_ECDSA_LIB);
2413 goto err;
2414 }
2415 s2n(j,p);
2416 n=j+2;
2417 }
2418 else
2419 #endif
2420 {
2421 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2422 goto err;
2423 }
2424 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2425 l2n3(n,d);
2426
2427 s->state=SSL3_ST_CW_CERT_VRFY_B;
2428 s->init_num=(int)n+4;
2429 s->init_off=0;
2430 }
2431 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2432 err:
2433 return(-1);
2434 }
2435
ssl3_send_client_certificate(SSL * s)2436 int ssl3_send_client_certificate(SSL *s)
2437 {
2438 X509 *x509=NULL;
2439 EVP_PKEY *pkey=NULL;
2440 int i;
2441 unsigned long l;
2442
2443 if (s->state == SSL3_ST_CW_CERT_A)
2444 {
2445 if ((s->cert == NULL) ||
2446 (s->cert->key->x509 == NULL) ||
2447 (s->cert->key->privatekey == NULL))
2448 s->state=SSL3_ST_CW_CERT_B;
2449 else
2450 s->state=SSL3_ST_CW_CERT_C;
2451 }
2452
2453 /* We need to get a client cert */
2454 if (s->state == SSL3_ST_CW_CERT_B)
2455 {
2456 /* If we get an error, we need to
2457 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2458 * We then get retied later */
2459 i=0;
2460 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2461 if (i < 0)
2462 {
2463 s->rwstate=SSL_X509_LOOKUP;
2464 return(-1);
2465 }
2466 s->rwstate=SSL_NOTHING;
2467 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2468 {
2469 s->state=SSL3_ST_CW_CERT_B;
2470 if ( !SSL_use_certificate(s,x509) ||
2471 !SSL_use_PrivateKey(s,pkey))
2472 i=0;
2473 }
2474 else if (i == 1)
2475 {
2476 i=0;
2477 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2478 }
2479
2480 if (x509 != NULL) X509_free(x509);
2481 if (pkey != NULL) EVP_PKEY_free(pkey);
2482 if (i == 0)
2483 {
2484 if (s->version == SSL3_VERSION)
2485 {
2486 s->s3->tmp.cert_req=0;
2487 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2488 return(1);
2489 }
2490 else
2491 {
2492 s->s3->tmp.cert_req=2;
2493 }
2494 }
2495
2496 /* Ok, we have a cert */
2497 s->state=SSL3_ST_CW_CERT_C;
2498 }
2499
2500 if (s->state == SSL3_ST_CW_CERT_C)
2501 {
2502 s->state=SSL3_ST_CW_CERT_D;
2503 l=ssl3_output_cert_chain(s,
2504 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2505 s->init_num=(int)l;
2506 s->init_off=0;
2507 }
2508 /* SSL3_ST_CW_CERT_D */
2509 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2510 }
2511
2512 #define has_bits(i,m) (((i)&(m)) == (m))
2513
ssl3_check_cert_and_algorithm(SSL * s)2514 int ssl3_check_cert_and_algorithm(SSL *s)
2515 {
2516 int i,idx;
2517 long algs;
2518 EVP_PKEY *pkey=NULL;
2519 SESS_CERT *sc;
2520 #ifndef OPENSSL_NO_RSA
2521 RSA *rsa;
2522 #endif
2523 #ifndef OPENSSL_NO_DH
2524 DH *dh;
2525 #endif
2526
2527 sc=s->session->sess_cert;
2528
2529 algs=s->s3->tmp.new_cipher->algorithms;
2530
2531 /* we don't have a certificate */
2532 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2533 return(1);
2534
2535 if (sc == NULL)
2536 {
2537 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2538 goto err;
2539 }
2540
2541 #ifndef OPENSSL_NO_RSA
2542 rsa=s->session->sess_cert->peer_rsa_tmp;
2543 #endif
2544 #ifndef OPENSSL_NO_DH
2545 dh=s->session->sess_cert->peer_dh_tmp;
2546 #endif
2547
2548 /* This is the passed certificate */
2549
2550 idx=sc->peer_cert_type;
2551 #ifndef OPENSSL_NO_ECDH
2552 if (idx == SSL_PKEY_ECC)
2553 {
2554 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2555 s->s3->tmp.new_cipher) == 0)
2556 { /* check failed */
2557 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2558 goto f_err;
2559 }
2560 else
2561 {
2562 return 1;
2563 }
2564 }
2565 #endif
2566 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2567 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2568 EVP_PKEY_free(pkey);
2569
2570
2571 /* Check that we have a certificate if we require one */
2572 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2573 {
2574 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2575 goto f_err;
2576 }
2577 #ifndef OPENSSL_NO_DSA
2578 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2579 {
2580 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2581 goto f_err;
2582 }
2583 #endif
2584 #ifndef OPENSSL_NO_RSA
2585 if ((algs & SSL_kRSA) &&
2586 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2587 {
2588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2589 goto f_err;
2590 }
2591 #endif
2592 #ifndef OPENSSL_NO_DH
2593 if ((algs & SSL_kEDH) &&
2594 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2595 {
2596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2597 goto f_err;
2598 }
2599 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2600 {
2601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2602 goto f_err;
2603 }
2604 #ifndef OPENSSL_NO_DSA
2605 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2606 {
2607 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2608 goto f_err;
2609 }
2610 #endif
2611 #endif
2612
2613 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2614 {
2615 #ifndef OPENSSL_NO_RSA
2616 if (algs & SSL_kRSA)
2617 {
2618 if (rsa == NULL
2619 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2620 {
2621 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2622 goto f_err;
2623 }
2624 }
2625 else
2626 #endif
2627 #ifndef OPENSSL_NO_DH
2628 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2629 {
2630 if (dh == NULL
2631 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2632 {
2633 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2634 goto f_err;
2635 }
2636 }
2637 else
2638 #endif
2639 {
2640 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2641 goto f_err;
2642 }
2643 }
2644 return(1);
2645 f_err:
2646 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2647 err:
2648 return(0);
2649 }
2650
2651
2652 #ifndef OPENSSL_NO_ECDH
2653 /* This is the complement of nid2curve_id in s3_srvr.c. */
curve_id2nid(int curve_id)2654 static int curve_id2nid(int curve_id)
2655 {
2656 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2657 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2658 static int nid_list[26] =
2659 {
2660 0,
2661 NID_sect163k1, /* sect163k1 (1) */
2662 NID_sect163r1, /* sect163r1 (2) */
2663 NID_sect163r2, /* sect163r2 (3) */
2664 NID_sect193r1, /* sect193r1 (4) */
2665 NID_sect193r2, /* sect193r2 (5) */
2666 NID_sect233k1, /* sect233k1 (6) */
2667 NID_sect233r1, /* sect233r1 (7) */
2668 NID_sect239k1, /* sect239k1 (8) */
2669 NID_sect283k1, /* sect283k1 (9) */
2670 NID_sect283r1, /* sect283r1 (10) */
2671 NID_sect409k1, /* sect409k1 (11) */
2672 NID_sect409r1, /* sect409r1 (12) */
2673 NID_sect571k1, /* sect571k1 (13) */
2674 NID_sect571r1, /* sect571r1 (14) */
2675 NID_secp160k1, /* secp160k1 (15) */
2676 NID_secp160r1, /* secp160r1 (16) */
2677 NID_secp160r2, /* secp160r2 (17) */
2678 NID_secp192k1, /* secp192k1 (18) */
2679 NID_X9_62_prime192v1, /* secp192r1 (19) */
2680 NID_secp224k1, /* secp224k1 (20) */
2681 NID_secp224r1, /* secp224r1 (21) */
2682 NID_secp256k1, /* secp256k1 (22) */
2683 NID_X9_62_prime256v1, /* secp256r1 (23) */
2684 NID_secp384r1, /* secp384r1 (24) */
2685 NID_secp521r1 /* secp521r1 (25) */
2686 };
2687
2688 if ((curve_id < 1) || (curve_id > 25)) return 0;
2689
2690 return nid_list[curve_id];
2691 }
2692 #endif
2693
2694 /* Check to see if handshake is full or resumed. Usually this is just a
2695 * case of checking to see if a cache hit has occurred. In the case of
2696 * session tickets we have to check the next message to be sure.
2697 */
2698
2699 #ifndef OPENSSL_NO_TLSEXT
ssl3_check_finished(SSL * s)2700 static int ssl3_check_finished(SSL *s)
2701 {
2702 int ok;
2703 long n;
2704 /* If we have no ticket or session ID is non-zero length (a match of
2705 * a non-zero session length would never reach here) it cannot be a
2706 * resumed session.
2707 */
2708 if (!s->session->tlsext_tick || s->session->session_id_length)
2709 return 1;
2710 /* this function is called when we really expect a Certificate
2711 * message, so permit appropriate message length */
2712 n=s->method->ssl_get_message(s,
2713 SSL3_ST_CR_CERT_A,
2714 SSL3_ST_CR_CERT_B,
2715 -1,
2716 s->max_cert_list,
2717 &ok);
2718 if (!ok) return((int)n);
2719 s->s3->tmp.reuse_message = 1;
2720 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
2721 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2722 return 2;
2723
2724 return 1;
2725 }
2726 #endif
2727
ssl_do_client_cert_cb(SSL * s,X509 ** px509,EVP_PKEY ** ppkey)2728 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2729 {
2730 int i = 0;
2731 #ifndef OPENSSL_NO_ENGINE
2732 if (s->ctx->client_cert_engine)
2733 {
2734 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2735 SSL_get_client_CA_list(s),
2736 px509, ppkey, NULL, NULL, NULL);
2737 if (i != 0)
2738 return i;
2739 }
2740 #endif
2741 if (s->ctx->client_cert_cb)
2742 i = s->ctx->client_cert_cb(s,px509,ppkey);
2743 return i;
2744 }
2745