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-rw-r--r--src/lib/libssl/s3_clnt.c1980
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diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
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+++ b/src/lib/libssl/s3_clnt.c
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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) 1998-2002 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#include <stdio.h>
113#include "ssl_locl.h"
114#include "kssl_lcl.h"
115#include <openssl/buffer.h>
116#include <openssl/rand.h>
117#include <openssl/objects.h>
118#include <openssl/evp.h>
119#include <openssl/md5.h>
120
121static SSL_METHOD *ssl3_get_client_method(int ver);
122static int ssl3_client_hello(SSL *s);
123static int ssl3_get_server_hello(SSL *s);
124static int ssl3_get_certificate_request(SSL *s);
125static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
126static int ssl3_get_server_done(SSL *s);
127static int ssl3_send_client_verify(SSL *s);
128static int ssl3_send_client_certificate(SSL *s);
129static int ssl3_send_client_key_exchange(SSL *s);
130static int ssl3_get_key_exchange(SSL *s);
131static int ssl3_get_server_certificate(SSL *s);
132static int ssl3_check_cert_and_algorithm(SSL *s);
133static SSL_METHOD *ssl3_get_client_method(int ver)
134 {
135 if (ver == SSL3_VERSION)
136 return(SSLv3_client_method());
137 else
138 return(NULL);
139 }
140
141SSL_METHOD *SSLv3_client_method(void)
142 {
143 static int init=1;
144 static SSL_METHOD SSLv3_client_data;
145
146 if (init)
147 {
148 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
149
150 if (init)
151 {
152 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
153 sizeof(SSL_METHOD));
154 SSLv3_client_data.ssl_connect=ssl3_connect;
155 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
156 init=0;
157 }
158
159 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
160 }
161 return(&SSLv3_client_data);
162 }
163
164int ssl3_connect(SSL *s)
165 {
166 BUF_MEM *buf=NULL;
167 unsigned long Time=time(NULL),l;
168 long num1;
169 void (*cb)(const SSL *ssl,int type,int val)=NULL;
170 int ret= -1;
171 int new_state,state,skip=0;
172
173 RAND_add(&Time,sizeof(Time),0);
174 ERR_clear_error();
175 clear_sys_error();
176
177 if (s->info_callback != NULL)
178 cb=s->info_callback;
179 else if (s->ctx->info_callback != NULL)
180 cb=s->ctx->info_callback;
181
182 s->in_handshake++;
183 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
184
185 for (;;)
186 {
187 state=s->state;
188
189 switch(s->state)
190 {
191 case SSL_ST_RENEGOTIATE:
192 s->new_session=1;
193 s->state=SSL_ST_CONNECT;
194 s->ctx->stats.sess_connect_renegotiate++;
195 /* break */
196 case SSL_ST_BEFORE:
197 case SSL_ST_CONNECT:
198 case SSL_ST_BEFORE|SSL_ST_CONNECT:
199 case SSL_ST_OK|SSL_ST_CONNECT:
200
201 s->server=0;
202 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
203
204 if ((s->version & 0xff00 ) != 0x0300)
205 {
206 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
207 ret = -1;
208 goto end;
209 }
210
211 /* s->version=SSL3_VERSION; */
212 s->type=SSL_ST_CONNECT;
213
214 if (s->init_buf == NULL)
215 {
216 if ((buf=BUF_MEM_new()) == NULL)
217 {
218 ret= -1;
219 goto end;
220 }
221 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
222 {
223 ret= -1;
224 goto end;
225 }
226 s->init_buf=buf;
227 buf=NULL;
228 }
229
230 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
231
232 /* setup buffing BIO */
233 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
234
235 /* don't push the buffering BIO quite yet */
236
237 ssl3_init_finished_mac(s);
238
239 s->state=SSL3_ST_CW_CLNT_HELLO_A;
240 s->ctx->stats.sess_connect++;
241 s->init_num=0;
242 break;
243
244 case SSL3_ST_CW_CLNT_HELLO_A:
245 case SSL3_ST_CW_CLNT_HELLO_B:
246
247 s->shutdown=0;
248 ret=ssl3_client_hello(s);
249 if (ret <= 0) goto end;
250 s->state=SSL3_ST_CR_SRVR_HELLO_A;
251 s->init_num=0;
252
253 /* turn on buffering for the next lot of output */
254 if (s->bbio != s->wbio)
255 s->wbio=BIO_push(s->bbio,s->wbio);
256
257 break;
258
259 case SSL3_ST_CR_SRVR_HELLO_A:
260 case SSL3_ST_CR_SRVR_HELLO_B:
261 ret=ssl3_get_server_hello(s);
262 if (ret <= 0) goto end;
263 if (s->hit)
264 s->state=SSL3_ST_CR_FINISHED_A;
265 else
266 s->state=SSL3_ST_CR_CERT_A;
267 s->init_num=0;
268 break;
269
270 case SSL3_ST_CR_CERT_A:
271 case SSL3_ST_CR_CERT_B:
272 /* Check if it is anon DH */
273 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
274 {
275 ret=ssl3_get_server_certificate(s);
276 if (ret <= 0) goto end;
277 }
278 else
279 skip=1;
280 s->state=SSL3_ST_CR_KEY_EXCH_A;
281 s->init_num=0;
282 break;
283
284 case SSL3_ST_CR_KEY_EXCH_A:
285 case SSL3_ST_CR_KEY_EXCH_B:
286 ret=ssl3_get_key_exchange(s);
287 if (ret <= 0) goto end;
288 s->state=SSL3_ST_CR_CERT_REQ_A;
289 s->init_num=0;
290
291 /* at this point we check that we have the
292 * required stuff from the server */
293 if (!ssl3_check_cert_and_algorithm(s))
294 {
295 ret= -1;
296 goto end;
297 }
298 break;
299
300 case SSL3_ST_CR_CERT_REQ_A:
301 case SSL3_ST_CR_CERT_REQ_B:
302 ret=ssl3_get_certificate_request(s);
303 if (ret <= 0) goto end;
304 s->state=SSL3_ST_CR_SRVR_DONE_A;
305 s->init_num=0;
306 break;
307
308 case SSL3_ST_CR_SRVR_DONE_A:
309 case SSL3_ST_CR_SRVR_DONE_B:
310 ret=ssl3_get_server_done(s);
311 if (ret <= 0) goto end;
312 if (s->s3->tmp.cert_req)
313 s->state=SSL3_ST_CW_CERT_A;
314 else
315 s->state=SSL3_ST_CW_KEY_EXCH_A;
316 s->init_num=0;
317
318 break;
319
320 case SSL3_ST_CW_CERT_A:
321 case SSL3_ST_CW_CERT_B:
322 case SSL3_ST_CW_CERT_C:
323 case SSL3_ST_CW_CERT_D:
324 ret=ssl3_send_client_certificate(s);
325 if (ret <= 0) goto end;
326 s->state=SSL3_ST_CW_KEY_EXCH_A;
327 s->init_num=0;
328 break;
329
330 case SSL3_ST_CW_KEY_EXCH_A:
331 case SSL3_ST_CW_KEY_EXCH_B:
332 ret=ssl3_send_client_key_exchange(s);
333 if (ret <= 0) goto end;
334 l=s->s3->tmp.new_cipher->algorithms;
335 /* EAY EAY EAY need to check for DH fix cert
336 * sent back */
337 /* For TLS, cert_req is set to 2, so a cert chain
338 * of nothing is sent, but no verify packet is sent */
339 if (s->s3->tmp.cert_req == 1)
340 {
341 s->state=SSL3_ST_CW_CERT_VRFY_A;
342 }
343 else
344 {
345 s->state=SSL3_ST_CW_CHANGE_A;
346 s->s3->change_cipher_spec=0;
347 }
348
349 s->init_num=0;
350 break;
351
352 case SSL3_ST_CW_CERT_VRFY_A:
353 case SSL3_ST_CW_CERT_VRFY_B:
354 ret=ssl3_send_client_verify(s);
355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_CW_CHANGE_A;
357 s->init_num=0;
358 s->s3->change_cipher_spec=0;
359 break;
360
361 case SSL3_ST_CW_CHANGE_A:
362 case SSL3_ST_CW_CHANGE_B:
363 ret=ssl3_send_change_cipher_spec(s,
364 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
365 if (ret <= 0) goto end;
366 s->state=SSL3_ST_CW_FINISHED_A;
367 s->init_num=0;
368
369 s->session->cipher=s->s3->tmp.new_cipher;
370 if (s->s3->tmp.new_compression == NULL)
371 s->session->compress_meth=0;
372 else
373 s->session->compress_meth=
374 s->s3->tmp.new_compression->id;
375 if (!s->method->ssl3_enc->setup_key_block(s))
376 {
377 ret= -1;
378 goto end;
379 }
380
381 if (!s->method->ssl3_enc->change_cipher_state(s,
382 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
383 {
384 ret= -1;
385 goto end;
386 }
387
388 break;
389
390 case SSL3_ST_CW_FINISHED_A:
391 case SSL3_ST_CW_FINISHED_B:
392 ret=ssl3_send_finished(s,
393 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
394 s->method->ssl3_enc->client_finished_label,
395 s->method->ssl3_enc->client_finished_label_len);
396 if (ret <= 0) goto end;
397 s->state=SSL3_ST_CW_FLUSH;
398
399 /* clear flags */
400 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
401 if (s->hit)
402 {
403 s->s3->tmp.next_state=SSL_ST_OK;
404 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
405 {
406 s->state=SSL_ST_OK;
407 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
408 s->s3->delay_buf_pop_ret=0;
409 }
410 }
411 else
412 {
413 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
414 }
415 s->init_num=0;
416 break;
417
418 case SSL3_ST_CR_FINISHED_A:
419 case SSL3_ST_CR_FINISHED_B:
420
421 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
422 SSL3_ST_CR_FINISHED_B);
423 if (ret <= 0) goto end;
424
425 if (s->hit)
426 s->state=SSL3_ST_CW_CHANGE_A;
427 else
428 s->state=SSL_ST_OK;
429 s->init_num=0;
430 break;
431
432 case SSL3_ST_CW_FLUSH:
433 /* number of bytes to be flushed */
434 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
435 if (num1 > 0)
436 {
437 s->rwstate=SSL_WRITING;
438 num1=BIO_flush(s->wbio);
439 if (num1 <= 0) { ret= -1; goto end; }
440 s->rwstate=SSL_NOTHING;
441 }
442
443 s->state=s->s3->tmp.next_state;
444 break;
445
446 case SSL_ST_OK:
447 /* clean a few things up */
448 ssl3_cleanup_key_block(s);
449
450 if (s->init_buf != NULL)
451 {
452 BUF_MEM_free(s->init_buf);
453 s->init_buf=NULL;
454 }
455
456 /* If we are not 'joining' the last two packets,
457 * remove the buffering now */
458 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
459 ssl_free_wbio_buffer(s);
460 /* else do it later in ssl3_write */
461
462 s->init_num=0;
463 s->new_session=0;
464
465 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
466 if (s->hit) s->ctx->stats.sess_hit++;
467
468 ret=1;
469 /* s->server=0; */
470 s->handshake_func=ssl3_connect;
471 s->ctx->stats.sess_connect_good++;
472
473 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
474
475 goto end;
476 /* break; */
477
478 default:
479 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
480 ret= -1;
481 goto end;
482 /* break; */
483 }
484
485 /* did we do anything */
486 if (!s->s3->tmp.reuse_message && !skip)
487 {
488 if (s->debug)
489 {
490 if ((ret=BIO_flush(s->wbio)) <= 0)
491 goto end;
492 }
493
494 if ((cb != NULL) && (s->state != state))
495 {
496 new_state=s->state;
497 s->state=state;
498 cb(s,SSL_CB_CONNECT_LOOP,1);
499 s->state=new_state;
500 }
501 }
502 skip=0;
503 }
504end:
505 s->in_handshake--;
506 if (buf != NULL)
507 BUF_MEM_free(buf);
508 if (cb != NULL)
509 cb(s,SSL_CB_CONNECT_EXIT,ret);
510 return(ret);
511 }
512
513
514static int ssl3_client_hello(SSL *s)
515 {
516 unsigned char *buf;
517 unsigned char *p,*d;
518 int i,j;
519 unsigned long Time,l;
520 SSL_COMP *comp;
521
522 buf=(unsigned char *)s->init_buf->data;
523 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
524 {
525 if ((s->session == NULL) ||
526 (s->session->ssl_version != s->version) ||
527 (s->session->not_resumable))
528 {
529 if (!ssl_get_new_session(s,0))
530 goto err;
531 }
532 /* else use the pre-loaded session */
533
534 p=s->s3->client_random;
535 Time=time(NULL); /* Time */
536 l2n(Time,p);
537 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
538
539 /* Do the message type and length last */
540 d=p= &(buf[4]);
541
542 *(p++)=s->version>>8;
543 *(p++)=s->version&0xff;
544 s->client_version=s->version;
545
546 /* Random stuff */
547 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
548 p+=SSL3_RANDOM_SIZE;
549
550 /* Session ID */
551 if (s->new_session)
552 i=0;
553 else
554 i=s->session->session_id_length;
555 *(p++)=i;
556 if (i != 0)
557 {
558 if (i > sizeof s->session->session_id)
559 {
560 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
561 goto err;
562 }
563 memcpy(p,s->session->session_id,i);
564 p+=i;
565 }
566
567 /* Ciphers supported */
568 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
569 if (i == 0)
570 {
571 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
572 goto err;
573 }
574 s2n(i,p);
575 p+=i;
576
577 /* COMPRESSION */
578 if (s->ctx->comp_methods == NULL)
579 j=0;
580 else
581 j=sk_SSL_COMP_num(s->ctx->comp_methods);
582 *(p++)=1+j;
583 for (i=0; i<j; i++)
584 {
585 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
586 *(p++)=comp->id;
587 }
588 *(p++)=0; /* Add the NULL method */
589
590 l=(p-d);
591 d=buf;
592 *(d++)=SSL3_MT_CLIENT_HELLO;
593 l2n3(l,d);
594
595 s->state=SSL3_ST_CW_CLNT_HELLO_B;
596 /* number of bytes to write */
597 s->init_num=p-buf;
598 s->init_off=0;
599 }
600
601 /* SSL3_ST_CW_CLNT_HELLO_B */
602 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
603err:
604 return(-1);
605 }
606
607static int ssl3_get_server_hello(SSL *s)
608 {
609 STACK_OF(SSL_CIPHER) *sk;
610 SSL_CIPHER *c;
611 unsigned char *p,*d;
612 int i,al,ok;
613 unsigned int j;
614 long n;
615 SSL_COMP *comp;
616
617 n=ssl3_get_message(s,
618 SSL3_ST_CR_SRVR_HELLO_A,
619 SSL3_ST_CR_SRVR_HELLO_B,
620 SSL3_MT_SERVER_HELLO,
621 300, /* ?? */
622 &ok);
623
624 if (!ok) return((int)n);
625 d=p=(unsigned char *)s->init_msg;
626
627 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
628 {
629 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
630 s->version=(s->version&0xff00)|p[1];
631 al=SSL_AD_PROTOCOL_VERSION;
632 goto f_err;
633 }
634 p+=2;
635
636 /* load the server hello data */
637 /* load the server random */
638 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
639 p+=SSL3_RANDOM_SIZE;
640
641 /* get the session-id */
642 j= *(p++);
643
644 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
645 {
646 al=SSL_AD_ILLEGAL_PARAMETER;
647 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
648 goto f_err;
649 }
650
651 if (j != 0 && j == s->session->session_id_length
652 && memcmp(p,s->session->session_id,j) == 0)
653 {
654 if(s->sid_ctx_length != s->session->sid_ctx_length
655 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
656 {
657 /* actually a client application bug */
658 al=SSL_AD_ILLEGAL_PARAMETER;
659 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
660 goto f_err;
661 }
662 s->hit=1;
663 }
664 else /* a miss or crap from the other end */
665 {
666 /* If we were trying for session-id reuse, make a new
667 * SSL_SESSION so we don't stuff up other people */
668 s->hit=0;
669 if (s->session->session_id_length > 0)
670 {
671 if (!ssl_get_new_session(s,0))
672 {
673 al=SSL_AD_INTERNAL_ERROR;
674 goto f_err;
675 }
676 }
677 s->session->session_id_length=j;
678 memcpy(s->session->session_id,p,j); /* j could be 0 */
679 }
680 p+=j;
681 c=ssl_get_cipher_by_char(s,p);
682 if (c == NULL)
683 {
684 /* unknown cipher */
685 al=SSL_AD_ILLEGAL_PARAMETER;
686 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
687 goto f_err;
688 }
689 p+=ssl_put_cipher_by_char(s,NULL,NULL);
690
691 sk=ssl_get_ciphers_by_id(s);
692 i=sk_SSL_CIPHER_find(sk,c);
693 if (i < 0)
694 {
695 /* we did not say we would use this cipher */
696 al=SSL_AD_ILLEGAL_PARAMETER;
697 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
698 goto f_err;
699 }
700
701 /* Depending on the session caching (internal/external), the cipher
702 and/or cipher_id values may not be set. Make sure that
703 cipher_id is set and use it for comparison. */
704 if (s->session->cipher)
705 s->session->cipher_id = s->session->cipher->id;
706 if (s->hit && (s->session->cipher_id != c->id))
707 {
708 if (!(s->options &
709 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
710 {
711 al=SSL_AD_ILLEGAL_PARAMETER;
712 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
713 goto f_err;
714 }
715 }
716 s->s3->tmp.new_cipher=c;
717
718 /* lets get the compression algorithm */
719 /* COMPRESSION */
720 j= *(p++);
721 if (j == 0)
722 comp=NULL;
723 else
724 comp=ssl3_comp_find(s->ctx->comp_methods,j);
725
726 if ((j != 0) && (comp == NULL))
727 {
728 al=SSL_AD_ILLEGAL_PARAMETER;
729 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
730 goto f_err;
731 }
732 else
733 {
734 s->s3->tmp.new_compression=comp;
735 }
736
737 if (p != (d+n))
738 {
739 /* wrong packet length */
740 al=SSL_AD_DECODE_ERROR;
741 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
742 goto err;
743 }
744
745 return(1);
746f_err:
747 ssl3_send_alert(s,SSL3_AL_FATAL,al);
748err:
749 return(-1);
750 }
751
752static int ssl3_get_server_certificate(SSL *s)
753 {
754 int al,i,ok,ret= -1;
755 unsigned long n,nc,llen,l;
756 X509 *x=NULL;
757 unsigned char *p,*d,*q;
758 STACK_OF(X509) *sk=NULL;
759 SESS_CERT *sc;
760 EVP_PKEY *pkey=NULL;
761 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
762
763 n=ssl3_get_message(s,
764 SSL3_ST_CR_CERT_A,
765 SSL3_ST_CR_CERT_B,
766 -1,
767 s->max_cert_list,
768 &ok);
769
770 if (!ok) return((int)n);
771
772 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
773 {
774 s->s3->tmp.reuse_message=1;
775 return(1);
776 }
777
778 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
779 {
780 al=SSL_AD_UNEXPECTED_MESSAGE;
781 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
782 goto f_err;
783 }
784 d=p=(unsigned char *)s->init_msg;
785
786 if ((sk=sk_X509_new_null()) == NULL)
787 {
788 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
789 goto err;
790 }
791
792 n2l3(p,llen);
793 if (llen+3 != n)
794 {
795 al=SSL_AD_DECODE_ERROR;
796 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
797 goto f_err;
798 }
799 for (nc=0; nc<llen; )
800 {
801 n2l3(p,l);
802 if ((l+nc+3) > llen)
803 {
804 al=SSL_AD_DECODE_ERROR;
805 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
806 goto f_err;
807 }
808
809 q=p;
810 x=d2i_X509(NULL,&q,l);
811 if (x == NULL)
812 {
813 al=SSL_AD_BAD_CERTIFICATE;
814 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
815 goto f_err;
816 }
817 if (q != (p+l))
818 {
819 al=SSL_AD_DECODE_ERROR;
820 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
821 goto f_err;
822 }
823 if (!sk_X509_push(sk,x))
824 {
825 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
826 goto err;
827 }
828 x=NULL;
829 nc+=l+3;
830 p=q;
831 }
832
833 i=ssl_verify_cert_chain(s,sk);
834 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
835#ifndef OPENSSL_NO_KRB5
836 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
837 != (SSL_aKRB5|SSL_kKRB5)
838#endif /* OPENSSL_NO_KRB5 */
839 )
840 {
841 al=ssl_verify_alarm_type(s->verify_result);
842 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
843 goto f_err;
844 }
845 ERR_clear_error(); /* but we keep s->verify_result */
846
847 sc=ssl_sess_cert_new();
848 if (sc == NULL) goto err;
849
850 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
851 s->session->sess_cert=sc;
852
853 sc->cert_chain=sk;
854 /* Inconsistency alert: cert_chain does include the peer's
855 * certificate, which we don't include in s3_srvr.c */
856 x=sk_X509_value(sk,0);
857 sk=NULL;
858 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
859
860 pkey=X509_get_pubkey(x);
861
862 /* VRS: allow null cert if auth == KRB5 */
863 need_cert = ((s->s3->tmp.new_cipher->algorithms
864 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
865 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
866
867#ifdef KSSL_DEBUG
868 printf("pkey,x = %p, %p\n", pkey,x);
869 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
870 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
871 s->s3->tmp.new_cipher->algorithms, need_cert);
872#endif /* KSSL_DEBUG */
873
874 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
875 {
876 x=NULL;
877 al=SSL3_AL_FATAL;
878 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
879 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
880 goto f_err;
881 }
882
883 i=ssl_cert_type(x,pkey);
884 if (need_cert && i < 0)
885 {
886 x=NULL;
887 al=SSL3_AL_FATAL;
888 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
889 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
890 goto f_err;
891 }
892
893 if (need_cert)
894 {
895 sc->peer_cert_type=i;
896 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
897 /* Why would the following ever happen?
898 * We just created sc a couple of lines ago. */
899 if (sc->peer_pkeys[i].x509 != NULL)
900 X509_free(sc->peer_pkeys[i].x509);
901 sc->peer_pkeys[i].x509=x;
902 sc->peer_key= &(sc->peer_pkeys[i]);
903
904 if (s->session->peer != NULL)
905 X509_free(s->session->peer);
906 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
907 s->session->peer=x;
908 }
909 else
910 {
911 sc->peer_cert_type=i;
912 sc->peer_key= NULL;
913
914 if (s->session->peer != NULL)
915 X509_free(s->session->peer);
916 s->session->peer=NULL;
917 }
918 s->session->verify_result = s->verify_result;
919
920 x=NULL;
921 ret=1;
922
923 if (0)
924 {
925f_err:
926 ssl3_send_alert(s,SSL3_AL_FATAL,al);
927 }
928err:
929 EVP_PKEY_free(pkey);
930 X509_free(x);
931 sk_X509_pop_free(sk,X509_free);
932 return(ret);
933 }
934
935static int ssl3_get_key_exchange(SSL *s)
936 {
937#ifndef OPENSSL_NO_RSA
938 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
939#endif
940 EVP_MD_CTX md_ctx;
941 unsigned char *param,*p;
942 int al,i,j,param_len,ok;
943 long n,alg;
944 EVP_PKEY *pkey=NULL;
945#ifndef OPENSSL_NO_RSA
946 RSA *rsa=NULL;
947#endif
948#ifndef OPENSSL_NO_DH
949 DH *dh=NULL;
950#endif
951
952 /* use same message size as in ssl3_get_certificate_request()
953 * as ServerKeyExchange message may be skipped */
954 n=ssl3_get_message(s,
955 SSL3_ST_CR_KEY_EXCH_A,
956 SSL3_ST_CR_KEY_EXCH_B,
957 -1,
958 s->max_cert_list,
959 &ok);
960
961 if (!ok) return((int)n);
962
963 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
964 {
965 s->s3->tmp.reuse_message=1;
966 return(1);
967 }
968
969 param=p=(unsigned char *)s->init_msg;
970
971 if (s->session->sess_cert != NULL)
972 {
973#ifndef OPENSSL_NO_RSA
974 if (s->session->sess_cert->peer_rsa_tmp != NULL)
975 {
976 RSA_free(s->session->sess_cert->peer_rsa_tmp);
977 s->session->sess_cert->peer_rsa_tmp=NULL;
978 }
979#endif
980#ifndef OPENSSL_NO_DH
981 if (s->session->sess_cert->peer_dh_tmp)
982 {
983 DH_free(s->session->sess_cert->peer_dh_tmp);
984 s->session->sess_cert->peer_dh_tmp=NULL;
985 }
986#endif
987 }
988 else
989 {
990 s->session->sess_cert=ssl_sess_cert_new();
991 }
992
993 param_len=0;
994 alg=s->s3->tmp.new_cipher->algorithms;
995 EVP_MD_CTX_init(&md_ctx);
996
997#ifndef OPENSSL_NO_RSA
998 if (alg & SSL_kRSA)
999 {
1000 if ((rsa=RSA_new()) == NULL)
1001 {
1002 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1003 goto err;
1004 }
1005 n2s(p,i);
1006 param_len=i+2;
1007 if (param_len > n)
1008 {
1009 al=SSL_AD_DECODE_ERROR;
1010 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1011 goto f_err;
1012 }
1013 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1014 {
1015 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1016 goto err;
1017 }
1018 p+=i;
1019
1020 n2s(p,i);
1021 param_len+=i+2;
1022 if (param_len > n)
1023 {
1024 al=SSL_AD_DECODE_ERROR;
1025 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1026 goto f_err;
1027 }
1028 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1029 {
1030 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1031 goto err;
1032 }
1033 p+=i;
1034 n-=param_len;
1035
1036 /* this should be because we are using an export cipher */
1037 if (alg & SSL_aRSA)
1038 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1039 else
1040 {
1041 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1042 goto err;
1043 }
1044 s->session->sess_cert->peer_rsa_tmp=rsa;
1045 rsa=NULL;
1046 }
1047#else /* OPENSSL_NO_RSA */
1048 if (0)
1049 ;
1050#endif
1051#ifndef OPENSSL_NO_DH
1052 else if (alg & SSL_kEDH)
1053 {
1054 if ((dh=DH_new()) == NULL)
1055 {
1056 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1057 goto err;
1058 }
1059 n2s(p,i);
1060 param_len=i+2;
1061 if (param_len > n)
1062 {
1063 al=SSL_AD_DECODE_ERROR;
1064 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1065 goto f_err;
1066 }
1067 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1068 {
1069 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1070 goto err;
1071 }
1072 p+=i;
1073
1074 n2s(p,i);
1075 param_len+=i+2;
1076 if (param_len > n)
1077 {
1078 al=SSL_AD_DECODE_ERROR;
1079 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1080 goto f_err;
1081 }
1082 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1083 {
1084 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1085 goto err;
1086 }
1087 p+=i;
1088
1089 n2s(p,i);
1090 param_len+=i+2;
1091 if (param_len > n)
1092 {
1093 al=SSL_AD_DECODE_ERROR;
1094 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1095 goto f_err;
1096 }
1097 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1098 {
1099 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1100 goto err;
1101 }
1102 p+=i;
1103 n-=param_len;
1104
1105#ifndef OPENSSL_NO_RSA
1106 if (alg & SSL_aRSA)
1107 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1108#else
1109 if (0)
1110 ;
1111#endif
1112#ifndef OPENSSL_NO_DSA
1113 else if (alg & SSL_aDSS)
1114 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1115#endif
1116 /* else anonymous DH, so no certificate or pkey. */
1117
1118 s->session->sess_cert->peer_dh_tmp=dh;
1119 dh=NULL;
1120 }
1121 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1122 {
1123 al=SSL_AD_ILLEGAL_PARAMETER;
1124 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1125 goto f_err;
1126 }
1127#endif /* !OPENSSL_NO_DH */
1128 if (alg & SSL_aFZA)
1129 {
1130 al=SSL_AD_HANDSHAKE_FAILURE;
1131 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1132 goto f_err;
1133 }
1134
1135
1136 /* p points to the next byte, there are 'n' bytes left */
1137
1138
1139 /* if it was signed, check the signature */
1140 if (pkey != NULL)
1141 {
1142 n2s(p,i);
1143 n-=2;
1144 j=EVP_PKEY_size(pkey);
1145
1146 if ((i != n) || (n > j) || (n <= 0))
1147 {
1148 /* wrong packet length */
1149 al=SSL_AD_DECODE_ERROR;
1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1151 goto f_err;
1152 }
1153
1154#ifndef OPENSSL_NO_RSA
1155 if (pkey->type == EVP_PKEY_RSA)
1156 {
1157 int num;
1158
1159 j=0;
1160 q=md_buf;
1161 for (num=2; num > 0; num--)
1162 {
1163 EVP_DigestInit_ex(&md_ctx,(num == 2)
1164 ?s->ctx->md5:s->ctx->sha1, NULL);
1165 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1166 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1167 EVP_DigestUpdate(&md_ctx,param,param_len);
1168 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1169 q+=i;
1170 j+=i;
1171 }
1172 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1173 pkey->pkey.rsa);
1174 if (i < 0)
1175 {
1176 al=SSL_AD_DECRYPT_ERROR;
1177 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1178 goto f_err;
1179 }
1180 if (i == 0)
1181 {
1182 /* bad signature */
1183 al=SSL_AD_DECRYPT_ERROR;
1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1185 goto f_err;
1186 }
1187 }
1188 else
1189#endif
1190#ifndef OPENSSL_NO_DSA
1191 if (pkey->type == EVP_PKEY_DSA)
1192 {
1193 /* lets do DSS */
1194 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1195 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1196 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1197 EVP_VerifyUpdate(&md_ctx,param,param_len);
1198 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1199 {
1200 /* bad signature */
1201 al=SSL_AD_DECRYPT_ERROR;
1202 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1203 goto f_err;
1204 }
1205 }
1206 else
1207#endif
1208 {
1209 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1210 goto err;
1211 }
1212 }
1213 else
1214 {
1215 /* still data left over */
1216 if (!(alg & SSL_aNULL))
1217 {
1218 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1219 goto err;
1220 }
1221 if (n != 0)
1222 {
1223 al=SSL_AD_DECODE_ERROR;
1224 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1225 goto f_err;
1226 }
1227 }
1228 EVP_PKEY_free(pkey);
1229 EVP_MD_CTX_cleanup(&md_ctx);
1230 return(1);
1231f_err:
1232 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1233err:
1234 EVP_PKEY_free(pkey);
1235#ifndef OPENSSL_NO_RSA
1236 if (rsa != NULL)
1237 RSA_free(rsa);
1238#endif
1239#ifndef OPENSSL_NO_DH
1240 if (dh != NULL)
1241 DH_free(dh);
1242#endif
1243 EVP_MD_CTX_cleanup(&md_ctx);
1244 return(-1);
1245 }
1246
1247static int ssl3_get_certificate_request(SSL *s)
1248 {
1249 int ok,ret=0;
1250 unsigned long n,nc,l;
1251 unsigned int llen,ctype_num,i;
1252 X509_NAME *xn=NULL;
1253 unsigned char *p,*d,*q;
1254 STACK_OF(X509_NAME) *ca_sk=NULL;
1255
1256 n=ssl3_get_message(s,
1257 SSL3_ST_CR_CERT_REQ_A,
1258 SSL3_ST_CR_CERT_REQ_B,
1259 -1,
1260 s->max_cert_list,
1261 &ok);
1262
1263 if (!ok) return((int)n);
1264
1265 s->s3->tmp.cert_req=0;
1266
1267 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1268 {
1269 s->s3->tmp.reuse_message=1;
1270 return(1);
1271 }
1272
1273 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1274 {
1275 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1276 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1277 goto err;
1278 }
1279
1280 /* TLS does not like anon-DH with client cert */
1281 if (s->version > SSL3_VERSION)
1282 {
1283 l=s->s3->tmp.new_cipher->algorithms;
1284 if (l & SSL_aNULL)
1285 {
1286 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1287 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1288 goto err;
1289 }
1290 }
1291
1292 d=p=(unsigned char *)s->init_msg;
1293
1294 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1295 {
1296 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1297 goto err;
1298 }
1299
1300 /* get the certificate types */
1301 ctype_num= *(p++);
1302 if (ctype_num > SSL3_CT_NUMBER)
1303 ctype_num=SSL3_CT_NUMBER;
1304 for (i=0; i<ctype_num; i++)
1305 s->s3->tmp.ctype[i]= p[i];
1306 p+=ctype_num;
1307
1308 /* get the CA RDNs */
1309 n2s(p,llen);
1310#if 0
1311{
1312FILE *out;
1313out=fopen("/tmp/vsign.der","w");
1314fwrite(p,1,llen,out);
1315fclose(out);
1316}
1317#endif
1318
1319 if ((llen+ctype_num+2+1) != n)
1320 {
1321 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1322 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1323 goto err;
1324 }
1325
1326 for (nc=0; nc<llen; )
1327 {
1328 n2s(p,l);
1329 if ((l+nc+2) > llen)
1330 {
1331 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1332 goto cont; /* netscape bugs */
1333 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1334 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1335 goto err;
1336 }
1337
1338 q=p;
1339
1340 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1341 {
1342 /* If netscape tolerance is on, ignore errors */
1343 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1344 goto cont;
1345 else
1346 {
1347 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1348 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1349 goto err;
1350 }
1351 }
1352
1353 if (q != (p+l))
1354 {
1355 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1356 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1357 goto err;
1358 }
1359 if (!sk_X509_NAME_push(ca_sk,xn))
1360 {
1361 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1362 goto err;
1363 }
1364
1365 p+=l;
1366 nc+=l+2;
1367 }
1368
1369 if (0)
1370 {
1371cont:
1372 ERR_clear_error();
1373 }
1374
1375 /* we should setup a certificate to return.... */
1376 s->s3->tmp.cert_req=1;
1377 s->s3->tmp.ctype_num=ctype_num;
1378 if (s->s3->tmp.ca_names != NULL)
1379 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1380 s->s3->tmp.ca_names=ca_sk;
1381 ca_sk=NULL;
1382
1383 ret=1;
1384err:
1385 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1386 return(ret);
1387 }
1388
1389static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1390 {
1391 return(X509_NAME_cmp(*a,*b));
1392 }
1393
1394static int ssl3_get_server_done(SSL *s)
1395 {
1396 int ok,ret=0;
1397 long n;
1398
1399 n=ssl3_get_message(s,
1400 SSL3_ST_CR_SRVR_DONE_A,
1401 SSL3_ST_CR_SRVR_DONE_B,
1402 SSL3_MT_SERVER_DONE,
1403 30, /* should be very small, like 0 :-) */
1404 &ok);
1405
1406 if (!ok) return((int)n);
1407 if (n > 0)
1408 {
1409 /* should contain no data */
1410 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1411 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1412 return -1;
1413 }
1414 ret=1;
1415 return(ret);
1416 }
1417
1418static int ssl3_send_client_key_exchange(SSL *s)
1419 {
1420 unsigned char *p,*d;
1421 int n;
1422 unsigned long l;
1423#ifndef OPENSSL_NO_RSA
1424 unsigned char *q;
1425 EVP_PKEY *pkey=NULL;
1426#endif
1427#ifndef OPENSSL_NO_KRB5
1428 KSSL_ERR kssl_err;
1429#endif /* OPENSSL_NO_KRB5 */
1430
1431 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1432 {
1433 d=(unsigned char *)s->init_buf->data;
1434 p= &(d[4]);
1435
1436 l=s->s3->tmp.new_cipher->algorithms;
1437
1438 /* Fool emacs indentation */
1439 if (0) {}
1440#ifndef OPENSSL_NO_RSA
1441 else if (l & SSL_kRSA)
1442 {
1443 RSA *rsa;
1444 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1445
1446 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1447 rsa=s->session->sess_cert->peer_rsa_tmp;
1448 else
1449 {
1450 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1451 if ((pkey == NULL) ||
1452 (pkey->type != EVP_PKEY_RSA) ||
1453 (pkey->pkey.rsa == NULL))
1454 {
1455 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1456 goto err;
1457 }
1458 rsa=pkey->pkey.rsa;
1459 EVP_PKEY_free(pkey);
1460 }
1461
1462 tmp_buf[0]=s->client_version>>8;
1463 tmp_buf[1]=s->client_version&0xff;
1464 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1465 goto err;
1466
1467 s->session->master_key_length=sizeof tmp_buf;
1468
1469 q=p;
1470 /* Fix buf for TLS and beyond */
1471 if (s->version > SSL3_VERSION)
1472 p+=2;
1473 n=RSA_public_encrypt(sizeof tmp_buf,
1474 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1475#ifdef PKCS1_CHECK
1476 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1477 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1478#endif
1479 if (n <= 0)
1480 {
1481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1482 goto err;
1483 }
1484
1485 /* Fix buf for TLS and beyond */
1486 if (s->version > SSL3_VERSION)
1487 {
1488 s2n(n,q);
1489 n+=2;
1490 }
1491
1492 s->session->master_key_length=
1493 s->method->ssl3_enc->generate_master_secret(s,
1494 s->session->master_key,
1495 tmp_buf,sizeof tmp_buf);
1496 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1497 }
1498#endif
1499#ifndef OPENSSL_NO_KRB5
1500 else if (l & SSL_kKRB5)
1501 {
1502 krb5_error_code krb5rc;
1503 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1504 /* krb5_data krb5_ap_req; */
1505 krb5_data *enc_ticket;
1506 krb5_data authenticator, *authp = NULL;
1507 EVP_CIPHER_CTX ciph_ctx;
1508 EVP_CIPHER *enc = NULL;
1509 unsigned char iv[EVP_MAX_IV_LENGTH];
1510 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1511 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1512 + EVP_MAX_IV_LENGTH];
1513 int padl, outl = sizeof(epms);
1514
1515 EVP_CIPHER_CTX_init(&ciph_ctx);
1516
1517#ifdef KSSL_DEBUG
1518 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1519 l, SSL_kKRB5);
1520#endif /* KSSL_DEBUG */
1521
1522 authp = NULL;
1523#ifdef KRB5SENDAUTH
1524 if (KRB5SENDAUTH) authp = &authenticator;
1525#endif /* KRB5SENDAUTH */
1526
1527 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1528 &kssl_err);
1529 enc = kssl_map_enc(kssl_ctx->enctype);
1530 if (enc == NULL)
1531 goto err;
1532#ifdef KSSL_DEBUG
1533 {
1534 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1535 if (krb5rc && kssl_err.text)
1536 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1537 }
1538#endif /* KSSL_DEBUG */
1539
1540 if (krb5rc)
1541 {
1542 ssl3_send_alert(s,SSL3_AL_FATAL,
1543 SSL_AD_HANDSHAKE_FAILURE);
1544 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1545 kssl_err.reason);
1546 goto err;
1547 }
1548
1549 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1550 ** in place of RFC 2712 KerberosWrapper, as in:
1551 **
1552 ** Send ticket (copy to *p, set n = length)
1553 ** n = krb5_ap_req.length;
1554 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1555 ** if (krb5_ap_req.data)
1556 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1557 **
1558 ** Now using real RFC 2712 KerberosWrapper
1559 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1560 ** Note: 2712 "opaque" types are here replaced
1561 ** with a 2-byte length followed by the value.
1562 ** Example:
1563 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1564 ** Where "xx xx" = length bytes. Shown here with
1565 ** optional authenticator omitted.
1566 */
1567
1568 /* KerberosWrapper.Ticket */
1569 s2n(enc_ticket->length,p);
1570 memcpy(p, enc_ticket->data, enc_ticket->length);
1571 p+= enc_ticket->length;
1572 n = enc_ticket->length + 2;
1573
1574 /* KerberosWrapper.Authenticator */
1575 if (authp && authp->length)
1576 {
1577 s2n(authp->length,p);
1578 memcpy(p, authp->data, authp->length);
1579 p+= authp->length;
1580 n+= authp->length + 2;
1581
1582 free(authp->data);
1583 authp->data = NULL;
1584 authp->length = 0;
1585 }
1586 else
1587 {
1588 s2n(0,p);/* null authenticator length */
1589 n+=2;
1590 }
1591
1592 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1593 goto err;
1594
1595 /* 20010420 VRS. Tried it this way; failed.
1596 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1597 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1598 ** kssl_ctx->length);
1599 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1600 */
1601
1602 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1603 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1604 kssl_ctx->key,iv);
1605 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1606 sizeof tmp_buf);
1607 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1608 outl += padl;
1609 if (outl > sizeof epms)
1610 {
1611 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1612 goto err;
1613 }
1614 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1615
1616 /* KerberosWrapper.EncryptedPreMasterSecret */
1617 s2n(outl,p);
1618 memcpy(p, epms, outl);
1619 p+=outl;
1620 n+=outl + 2;
1621
1622 s->session->master_key_length=
1623 s->method->ssl3_enc->generate_master_secret(s,
1624 s->session->master_key,
1625 tmp_buf, sizeof tmp_buf);
1626
1627 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1628 OPENSSL_cleanse(epms, outl);
1629 }
1630#endif
1631#ifndef OPENSSL_NO_DH
1632 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1633 {
1634 DH *dh_srvr,*dh_clnt;
1635
1636 if (s->session->sess_cert->peer_dh_tmp != NULL)
1637 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1638 else
1639 {
1640 /* we get them from the cert */
1641 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1643 goto err;
1644 }
1645
1646 /* generate a new random key */
1647 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1648 {
1649 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1650 goto err;
1651 }
1652 if (!DH_generate_key(dh_clnt))
1653 {
1654 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1655 goto err;
1656 }
1657
1658 /* use the 'p' output buffer for the DH key, but
1659 * make sure to clear it out afterwards */
1660
1661 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1662
1663 if (n <= 0)
1664 {
1665 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1666 goto err;
1667 }
1668
1669 /* generate master key from the result */
1670 s->session->master_key_length=
1671 s->method->ssl3_enc->generate_master_secret(s,
1672 s->session->master_key,p,n);
1673 /* clean up */
1674 memset(p,0,n);
1675
1676 /* send off the data */
1677 n=BN_num_bytes(dh_clnt->pub_key);
1678 s2n(n,p);
1679 BN_bn2bin(dh_clnt->pub_key,p);
1680 n+=2;
1681
1682 DH_free(dh_clnt);
1683
1684 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1685 }
1686#endif
1687 else
1688 {
1689 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1690 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1691 goto err;
1692 }
1693
1694 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1695 l2n3(n,d);
1696
1697 s->state=SSL3_ST_CW_KEY_EXCH_B;
1698 /* number of bytes to write */
1699 s->init_num=n+4;
1700 s->init_off=0;
1701 }
1702
1703 /* SSL3_ST_CW_KEY_EXCH_B */
1704 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1705err:
1706 return(-1);
1707 }
1708
1709static int ssl3_send_client_verify(SSL *s)
1710 {
1711 unsigned char *p,*d;
1712 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1713 EVP_PKEY *pkey;
1714#ifndef OPENSSL_NO_RSA
1715 unsigned u=0;
1716#endif
1717 unsigned long n;
1718#ifndef OPENSSL_NO_DSA
1719 int j;
1720#endif
1721
1722 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1723 {
1724 d=(unsigned char *)s->init_buf->data;
1725 p= &(d[4]);
1726 pkey=s->cert->key->privatekey;
1727
1728 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1729 &(data[MD5_DIGEST_LENGTH]));
1730
1731#ifndef OPENSSL_NO_RSA
1732 if (pkey->type == EVP_PKEY_RSA)
1733 {
1734 s->method->ssl3_enc->cert_verify_mac(s,
1735 &(s->s3->finish_dgst1),&(data[0]));
1736 if (RSA_sign(NID_md5_sha1, data,
1737 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1738 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1739 {
1740 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1741 goto err;
1742 }
1743 s2n(u,p);
1744 n=u+2;
1745 }
1746 else
1747#endif
1748#ifndef OPENSSL_NO_DSA
1749 if (pkey->type == EVP_PKEY_DSA)
1750 {
1751 if (!DSA_sign(pkey->save_type,
1752 &(data[MD5_DIGEST_LENGTH]),
1753 SHA_DIGEST_LENGTH,&(p[2]),
1754 (unsigned int *)&j,pkey->pkey.dsa))
1755 {
1756 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1757 goto err;
1758 }
1759 s2n(j,p);
1760 n=j+2;
1761 }
1762 else
1763#endif
1764 {
1765 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1766 goto err;
1767 }
1768 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1769 l2n3(n,d);
1770
1771 s->state=SSL3_ST_CW_CERT_VRFY_B;
1772 s->init_num=(int)n+4;
1773 s->init_off=0;
1774 }
1775 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1776err:
1777 return(-1);
1778 }
1779
1780static int ssl3_send_client_certificate(SSL *s)
1781 {
1782 X509 *x509=NULL;
1783 EVP_PKEY *pkey=NULL;
1784 int i;
1785 unsigned long l;
1786
1787 if (s->state == SSL3_ST_CW_CERT_A)
1788 {
1789 if ((s->cert == NULL) ||
1790 (s->cert->key->x509 == NULL) ||
1791 (s->cert->key->privatekey == NULL))
1792 s->state=SSL3_ST_CW_CERT_B;
1793 else
1794 s->state=SSL3_ST_CW_CERT_C;
1795 }
1796
1797 /* We need to get a client cert */
1798 if (s->state == SSL3_ST_CW_CERT_B)
1799 {
1800 /* If we get an error, we need to
1801 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1802 * We then get retied later */
1803 i=0;
1804 if (s->ctx->client_cert_cb != NULL)
1805 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1806 if (i < 0)
1807 {
1808 s->rwstate=SSL_X509_LOOKUP;
1809 return(-1);
1810 }
1811 s->rwstate=SSL_NOTHING;
1812 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1813 {
1814 s->state=SSL3_ST_CW_CERT_B;
1815 if ( !SSL_use_certificate(s,x509) ||
1816 !SSL_use_PrivateKey(s,pkey))
1817 i=0;
1818 }
1819 else if (i == 1)
1820 {
1821 i=0;
1822 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1823 }
1824
1825 if (x509 != NULL) X509_free(x509);
1826 if (pkey != NULL) EVP_PKEY_free(pkey);
1827 if (i == 0)
1828 {
1829 if (s->version == SSL3_VERSION)
1830 {
1831 s->s3->tmp.cert_req=0;
1832 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1833 return(1);
1834 }
1835 else
1836 {
1837 s->s3->tmp.cert_req=2;
1838 }
1839 }
1840
1841 /* Ok, we have a cert */
1842 s->state=SSL3_ST_CW_CERT_C;
1843 }
1844
1845 if (s->state == SSL3_ST_CW_CERT_C)
1846 {
1847 s->state=SSL3_ST_CW_CERT_D;
1848 l=ssl3_output_cert_chain(s,
1849 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1850 s->init_num=(int)l;
1851 s->init_off=0;
1852 }
1853 /* SSL3_ST_CW_CERT_D */
1854 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1855 }
1856
1857#define has_bits(i,m) (((i)&(m)) == (m))
1858
1859static int ssl3_check_cert_and_algorithm(SSL *s)
1860 {
1861 int i,idx;
1862 long algs;
1863 EVP_PKEY *pkey=NULL;
1864 SESS_CERT *sc;
1865#ifndef OPENSSL_NO_RSA
1866 RSA *rsa;
1867#endif
1868#ifndef OPENSSL_NO_DH
1869 DH *dh;
1870#endif
1871
1872 sc=s->session->sess_cert;
1873
1874 if (sc == NULL)
1875 {
1876 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
1877 goto err;
1878 }
1879
1880 algs=s->s3->tmp.new_cipher->algorithms;
1881
1882 /* we don't have a certificate */
1883 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
1884 return(1);
1885
1886#ifndef OPENSSL_NO_RSA
1887 rsa=s->session->sess_cert->peer_rsa_tmp;
1888#endif
1889#ifndef OPENSSL_NO_DH
1890 dh=s->session->sess_cert->peer_dh_tmp;
1891#endif
1892
1893 /* This is the passed certificate */
1894
1895 idx=sc->peer_cert_type;
1896 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1897 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1898 EVP_PKEY_free(pkey);
1899
1900
1901 /* Check that we have a certificate if we require one */
1902 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1903 {
1904 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1905 goto f_err;
1906 }
1907#ifndef OPENSSL_NO_DSA
1908 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1909 {
1910 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1911 goto f_err;
1912 }
1913#endif
1914#ifndef OPENSSL_NO_RSA
1915 if ((algs & SSL_kRSA) &&
1916 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1917 {
1918 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1919 goto f_err;
1920 }
1921#endif
1922#ifndef OPENSSL_NO_DH
1923 if ((algs & SSL_kEDH) &&
1924 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1925 {
1926 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1927 goto f_err;
1928 }
1929 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1930 {
1931 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1932 goto f_err;
1933 }
1934#ifndef OPENSSL_NO_DSA
1935 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1936 {
1937 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1938 goto f_err;
1939 }
1940#endif
1941#endif
1942
1943 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1944 {
1945#ifndef OPENSSL_NO_RSA
1946 if (algs & SSL_kRSA)
1947 {
1948 if (rsa == NULL
1949 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1950 {
1951 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1952 goto f_err;
1953 }
1954 }
1955 else
1956#endif
1957#ifndef OPENSSL_NO_DH
1958 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1959 {
1960 if (dh == NULL
1961 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1962 {
1963 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1964 goto f_err;
1965 }
1966 }
1967 else
1968#endif
1969 {
1970 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1971 goto f_err;
1972 }
1973 }
1974 return(1);
1975f_err:
1976 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1977err:
1978 return(0);
1979 }
1980
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-10-26 20:18:33 +0000