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 <openssl/buffer.h>
114#include <openssl/rand.h>
115#include <openssl/objects.h>
116#include <openssl/md5.h>
117#include <openssl/sha.h>
118#include <openssl/evp.h>
119#include "ssl_locl.h"
120#include "cryptlib.h"
121
122static SSL_METHOD *ssl3_get_client_method(int ver);
123static int ssl3_client_hello(SSL *s);
124static int ssl3_get_server_hello(SSL *s);
125static int ssl3_get_certificate_request(SSL *s);
126static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
127static int ssl3_get_server_done(SSL *s);
128static int ssl3_send_client_verify(SSL *s);
129static int ssl3_send_client_certificate(SSL *s);
130static int ssl3_send_client_key_exchange(SSL *s);
131static int ssl3_get_key_exchange(SSL *s);
132static int ssl3_get_server_certificate(SSL *s);
133static int ssl3_check_cert_and_algorithm(SSL *s);
134static SSL_METHOD *ssl3_get_client_method(int ver)
135 {
136 if (ver == SSL3_VERSION)
137 return(SSLv3_client_method());
138 else
139 return(NULL);
140 }
141
142SSL_METHOD *SSLv3_client_method(void)
143 {
144 static int init=1;
145 static SSL_METHOD SSLv3_client_data;
146
147 if (init)
148 {
149 init=0;
150 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
151 sizeof(SSL_METHOD));
152 SSLv3_client_data.ssl_connect=ssl3_connect;
153 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
154 }
155 return(&SSLv3_client_data);
156 }
157
158int ssl3_connect(SSL *s)
159 {
160 BUF_MEM *buf;
161 unsigned long Time=time(NULL),l;
162 long num1;
163 void (*cb)()=NULL;
164 int ret= -1;
165 int new_state,state,skip=0;;
166
167 RAND_add(&Time,sizeof(Time),0);
168 ERR_clear_error();
169 clear_sys_error();
170
171 if (s->info_callback != NULL)
172 cb=s->info_callback;
173 else if (s->ctx->info_callback != NULL)
174 cb=s->ctx->info_callback;
175
176 s->in_handshake++;
177 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
178
179 for (;;)
180 {
181 state=s->state;
182
183 switch(s->state)
184 {
185 case SSL_ST_RENEGOTIATE:
186 s->new_session=1;
187 s->state=SSL_ST_CONNECT;
188 s->ctx->stats.sess_connect_renegotiate++;
189 /* break */
190 case SSL_ST_BEFORE:
191 case SSL_ST_CONNECT:
192 case SSL_ST_BEFORE|SSL_ST_CONNECT:
193 case SSL_ST_OK|SSL_ST_CONNECT:
194
195 s->server=0;
196 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
197
198 if ((s->version & 0xff00 ) != 0x0300)
199 {
200 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_INTERNAL_ERROR);
201 ret = -1;
202 goto end;
203 }
204
205 /* s->version=SSL3_VERSION; */
206 s->type=SSL_ST_CONNECT;
207
208 if (s->init_buf == NULL)
209 {
210 if ((buf=BUF_MEM_new()) == NULL)
211 {
212 ret= -1;
213 goto end;
214 }
215 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
216 {
217 ret= -1;
218 goto end;
219 }
220 s->init_buf=buf;
221 }
222
223 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
224
225 /* setup buffing BIO */
226 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
227
228 /* don't push the buffering BIO quite yet */
229
230 ssl3_init_finished_mac(s);
231
232 s->state=SSL3_ST_CW_CLNT_HELLO_A;
233 s->ctx->stats.sess_connect++;
234 s->init_num=0;
235 break;
236
237 case SSL3_ST_CW_CLNT_HELLO_A:
238 case SSL3_ST_CW_CLNT_HELLO_B:
239
240 s->shutdown=0;
241 ret=ssl3_client_hello(s);
242 if (ret <= 0) goto end;
243 s->state=SSL3_ST_CR_SRVR_HELLO_A;
244 s->init_num=0;
245
246 /* turn on buffering for the next lot of output */
247 if (s->bbio != s->wbio)
248 s->wbio=BIO_push(s->bbio,s->wbio);
249
250 break;
251
252 case SSL3_ST_CR_SRVR_HELLO_A:
253 case SSL3_ST_CR_SRVR_HELLO_B:
254 ret=ssl3_get_server_hello(s);
255 if (ret <= 0) goto end;
256 if (s->hit)
257 s->state=SSL3_ST_CR_FINISHED_A;
258 else
259 s->state=SSL3_ST_CR_CERT_A;
260 s->init_num=0;
261 break;
262
263 case SSL3_ST_CR_CERT_A:
264 case SSL3_ST_CR_CERT_B:
265 /* Check if it is anon DH */
266 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
267 {
268 ret=ssl3_get_server_certificate(s);
269 if (ret <= 0) goto end;
270 }
271 else
272 skip=1;
273 s->state=SSL3_ST_CR_KEY_EXCH_A;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CR_KEY_EXCH_A:
278 case SSL3_ST_CR_KEY_EXCH_B:
279 ret=ssl3_get_key_exchange(s);
280 if (ret <= 0) goto end;
281 s->state=SSL3_ST_CR_CERT_REQ_A;
282 s->init_num=0;
283
284 /* at this point we check that we have the
285 * required stuff from the server */
286 if (!ssl3_check_cert_and_algorithm(s))
287 {
288 ret= -1;
289 goto end;
290 }
291 break;
292
293 case SSL3_ST_CR_CERT_REQ_A:
294 case SSL3_ST_CR_CERT_REQ_B:
295 ret=ssl3_get_certificate_request(s);
296 if (ret <= 0) goto end;
297 s->state=SSL3_ST_CR_SRVR_DONE_A;
298 s->init_num=0;
299 break;
300
301 case SSL3_ST_CR_SRVR_DONE_A:
302 case SSL3_ST_CR_SRVR_DONE_B:
303 ret=ssl3_get_server_done(s);
304 if (ret <= 0) goto end;
305 if (s->s3->tmp.cert_req)
306 s->state=SSL3_ST_CW_CERT_A;
307 else
308 s->state=SSL3_ST_CW_KEY_EXCH_A;
309 s->init_num=0;
310
311 break;
312
313 case SSL3_ST_CW_CERT_A:
314 case SSL3_ST_CW_CERT_B:
315 case SSL3_ST_CW_CERT_C:
316 case SSL3_ST_CW_CERT_D:
317 ret=ssl3_send_client_certificate(s);
318 if (ret <= 0) goto end;
319 s->state=SSL3_ST_CW_KEY_EXCH_A;
320 s->init_num=0;
321 break;
322
323 case SSL3_ST_CW_KEY_EXCH_A:
324 case SSL3_ST_CW_KEY_EXCH_B:
325 ret=ssl3_send_client_key_exchange(s);
326 if (ret <= 0) goto end;
327 l=s->s3->tmp.new_cipher->algorithms;
328 /* EAY EAY EAY need to check for DH fix cert
329 * sent back */
330 /* For TLS, cert_req is set to 2, so a cert chain
331 * of nothing is sent, but no verify packet is sent */
332 if (s->s3->tmp.cert_req == 1)
333 {
334 s->state=SSL3_ST_CW_CERT_VRFY_A;
335 }
336 else
337 {
338 s->state=SSL3_ST_CW_CHANGE_A;
339 s->s3->change_cipher_spec=0;
340 }
341
342 s->init_num=0;
343 break;
344
345 case SSL3_ST_CW_CERT_VRFY_A:
346 case SSL3_ST_CW_CERT_VRFY_B:
347 ret=ssl3_send_client_verify(s);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CW_CHANGE_A;
350 s->init_num=0;
351 s->s3->change_cipher_spec=0;
352 break;
353
354 case SSL3_ST_CW_CHANGE_A:
355 case SSL3_ST_CW_CHANGE_B:
356 ret=ssl3_send_change_cipher_spec(s,
357 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
358 if (ret <= 0) goto end;
359 s->state=SSL3_ST_CW_FINISHED_A;
360 s->init_num=0;
361
362 s->session->cipher=s->s3->tmp.new_cipher;
363 if (s->s3->tmp.new_compression == NULL)
364 s->session->compress_meth=0;
365 else
366 s->session->compress_meth=
367 s->s3->tmp.new_compression->id;
368 if (!s->method->ssl3_enc->setup_key_block(s))
369 {
370 ret= -1;
371 goto end;
372 }
373
374 if (!s->method->ssl3_enc->change_cipher_state(s,
375 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
376 {
377 ret= -1;
378 goto end;
379 }
380
381 break;
382
383 case SSL3_ST_CW_FINISHED_A:
384 case SSL3_ST_CW_FINISHED_B:
385 ret=ssl3_send_finished(s,
386 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
387 s->method->ssl3_enc->client_finished_label,
388 s->method->ssl3_enc->client_finished_label_len);
389 if (ret <= 0) goto end;
390 s->state=SSL3_ST_CW_FLUSH;
391
392 /* clear flags */
393 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
394 if (s->hit)
395 {
396 s->s3->tmp.next_state=SSL_ST_OK;
397 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
398 {
399 s->state=SSL_ST_OK;
400 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
401 s->s3->delay_buf_pop_ret=0;
402 }
403 }
404 else
405 {
406 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
407 }
408 s->init_num=0;
409 break;
410
411 case SSL3_ST_CR_FINISHED_A:
412 case SSL3_ST_CR_FINISHED_B:
413
414 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
415 SSL3_ST_CR_FINISHED_B);
416 if (ret <= 0) goto end;
417
418 if (s->hit)
419 s->state=SSL3_ST_CW_CHANGE_A;
420 else
421 s->state=SSL_ST_OK;
422 s->init_num=0;
423 break;
424
425 case SSL3_ST_CW_FLUSH:
426 /* number of bytes to be flushed */
427 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
428 if (num1 > 0)
429 {
430 s->rwstate=SSL_WRITING;
431 num1=BIO_flush(s->wbio);
432 if (num1 <= 0) { ret= -1; goto end; }
433 s->rwstate=SSL_NOTHING;
434 }
435
436 s->state=s->s3->tmp.next_state;
437 break;
438
439 case SSL_ST_OK:
440 /* clean a few things up */
441 ssl3_cleanup_key_block(s);
442
443 if (s->init_buf != NULL)
444 {
445 BUF_MEM_free(s->init_buf);
446 s->init_buf=NULL;
447 }
448
449 /* If we are not 'joining' the last two packets,
450 * remove the buffering now */
451 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
452 ssl_free_wbio_buffer(s);
453 /* else do it later in ssl3_write */
454
455 s->init_num=0;
456 s->new_session=0;
457
458 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
459 if (s->hit) s->ctx->stats.sess_hit++;
460
461 ret=1;
462 /* s->server=0; */
463 s->handshake_func=ssl3_connect;
464 s->ctx->stats.sess_connect_good++;
465
466 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
467
468 goto end;
469 /* break; */
470
471 default:
472 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
473 ret= -1;
474 goto end;
475 /* break; */
476 }
477
478 /* did we do anything */
479 if (!s->s3->tmp.reuse_message && !skip)
480 {
481 if (s->debug)
482 {
483 if ((ret=BIO_flush(s->wbio)) <= 0)
484 goto end;
485 }
486
487 if ((cb != NULL) && (s->state != state))
488 {
489 new_state=s->state;
490 s->state=state;
491 cb(s,SSL_CB_CONNECT_LOOP,1);
492 s->state=new_state;
493 }
494 }
495 skip=0;
496 }
497end:
498 s->in_handshake--;
499 if (cb != NULL)
500 cb(s,SSL_CB_CONNECT_EXIT,ret);
501 return(ret);
502 }
503
504
505static int ssl3_client_hello(SSL *s)
506 {
507 unsigned char *buf;
508 unsigned char *p,*d;
509 int i,j;
510 unsigned long Time,l;
511 SSL_COMP *comp;
512
513 buf=(unsigned char *)s->init_buf->data;
514 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
515 {
516 if ((s->session == NULL) ||
517 (s->session->ssl_version != s->version) ||
518 (s->session->not_resumable))
519 {
520 if (!ssl_get_new_session(s,0))
521 goto err;
522 }
523 /* else use the pre-loaded session */
524
525 p=s->s3->client_random;
526 Time=time(NULL); /* Time */
527 l2n(Time,p);
528 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
529
530 /* Do the message type and length last */
531 d=p= &(buf[4]);
532
533 *(p++)=s->version>>8;
534 *(p++)=s->version&0xff;
535 s->client_version=s->version;
536
537 /* Random stuff */
538 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
539 p+=SSL3_RANDOM_SIZE;
540
541 /* Session ID */
542 if (s->new_session)
543 i=0;
544 else
545 i=s->session->session_id_length;
546 *(p++)=i;
547 if (i != 0)
548 {
| 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 <openssl/buffer.h>
114#include <openssl/rand.h>
115#include <openssl/objects.h>
116#include <openssl/md5.h>
117#include <openssl/sha.h>
118#include <openssl/evp.h>
119#include "ssl_locl.h"
120#include "cryptlib.h"
121
122static SSL_METHOD *ssl3_get_client_method(int ver);
123static int ssl3_client_hello(SSL *s);
124static int ssl3_get_server_hello(SSL *s);
125static int ssl3_get_certificate_request(SSL *s);
126static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
127static int ssl3_get_server_done(SSL *s);
128static int ssl3_send_client_verify(SSL *s);
129static int ssl3_send_client_certificate(SSL *s);
130static int ssl3_send_client_key_exchange(SSL *s);
131static int ssl3_get_key_exchange(SSL *s);
132static int ssl3_get_server_certificate(SSL *s);
133static int ssl3_check_cert_and_algorithm(SSL *s);
134static SSL_METHOD *ssl3_get_client_method(int ver)
135 {
136 if (ver == SSL3_VERSION)
137 return(SSLv3_client_method());
138 else
139 return(NULL);
140 }
141
142SSL_METHOD *SSLv3_client_method(void)
143 {
144 static int init=1;
145 static SSL_METHOD SSLv3_client_data;
146
147 if (init)
148 {
149 init=0;
150 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
151 sizeof(SSL_METHOD));
152 SSLv3_client_data.ssl_connect=ssl3_connect;
153 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
154 }
155 return(&SSLv3_client_data);
156 }
157
158int ssl3_connect(SSL *s)
159 {
160 BUF_MEM *buf;
161 unsigned long Time=time(NULL),l;
162 long num1;
163 void (*cb)()=NULL;
164 int ret= -1;
165 int new_state,state,skip=0;;
166
167 RAND_add(&Time,sizeof(Time),0);
168 ERR_clear_error();
169 clear_sys_error();
170
171 if (s->info_callback != NULL)
172 cb=s->info_callback;
173 else if (s->ctx->info_callback != NULL)
174 cb=s->ctx->info_callback;
175
176 s->in_handshake++;
177 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
178
179 for (;;)
180 {
181 state=s->state;
182
183 switch(s->state)
184 {
185 case SSL_ST_RENEGOTIATE:
186 s->new_session=1;
187 s->state=SSL_ST_CONNECT;
188 s->ctx->stats.sess_connect_renegotiate++;
189 /* break */
190 case SSL_ST_BEFORE:
191 case SSL_ST_CONNECT:
192 case SSL_ST_BEFORE|SSL_ST_CONNECT:
193 case SSL_ST_OK|SSL_ST_CONNECT:
194
195 s->server=0;
196 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
197
198 if ((s->version & 0xff00 ) != 0x0300)
199 {
200 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_INTERNAL_ERROR);
201 ret = -1;
202 goto end;
203 }
204
205 /* s->version=SSL3_VERSION; */
206 s->type=SSL_ST_CONNECT;
207
208 if (s->init_buf == NULL)
209 {
210 if ((buf=BUF_MEM_new()) == NULL)
211 {
212 ret= -1;
213 goto end;
214 }
215 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
216 {
217 ret= -1;
218 goto end;
219 }
220 s->init_buf=buf;
221 }
222
223 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
224
225 /* setup buffing BIO */
226 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
227
228 /* don't push the buffering BIO quite yet */
229
230 ssl3_init_finished_mac(s);
231
232 s->state=SSL3_ST_CW_CLNT_HELLO_A;
233 s->ctx->stats.sess_connect++;
234 s->init_num=0;
235 break;
236
237 case SSL3_ST_CW_CLNT_HELLO_A:
238 case SSL3_ST_CW_CLNT_HELLO_B:
239
240 s->shutdown=0;
241 ret=ssl3_client_hello(s);
242 if (ret <= 0) goto end;
243 s->state=SSL3_ST_CR_SRVR_HELLO_A;
244 s->init_num=0;
245
246 /* turn on buffering for the next lot of output */
247 if (s->bbio != s->wbio)
248 s->wbio=BIO_push(s->bbio,s->wbio);
249
250 break;
251
252 case SSL3_ST_CR_SRVR_HELLO_A:
253 case SSL3_ST_CR_SRVR_HELLO_B:
254 ret=ssl3_get_server_hello(s);
255 if (ret <= 0) goto end;
256 if (s->hit)
257 s->state=SSL3_ST_CR_FINISHED_A;
258 else
259 s->state=SSL3_ST_CR_CERT_A;
260 s->init_num=0;
261 break;
262
263 case SSL3_ST_CR_CERT_A:
264 case SSL3_ST_CR_CERT_B:
265 /* Check if it is anon DH */
266 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
267 {
268 ret=ssl3_get_server_certificate(s);
269 if (ret <= 0) goto end;
270 }
271 else
272 skip=1;
273 s->state=SSL3_ST_CR_KEY_EXCH_A;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CR_KEY_EXCH_A:
278 case SSL3_ST_CR_KEY_EXCH_B:
279 ret=ssl3_get_key_exchange(s);
280 if (ret <= 0) goto end;
281 s->state=SSL3_ST_CR_CERT_REQ_A;
282 s->init_num=0;
283
284 /* at this point we check that we have the
285 * required stuff from the server */
286 if (!ssl3_check_cert_and_algorithm(s))
287 {
288 ret= -1;
289 goto end;
290 }
291 break;
292
293 case SSL3_ST_CR_CERT_REQ_A:
294 case SSL3_ST_CR_CERT_REQ_B:
295 ret=ssl3_get_certificate_request(s);
296 if (ret <= 0) goto end;
297 s->state=SSL3_ST_CR_SRVR_DONE_A;
298 s->init_num=0;
299 break;
300
301 case SSL3_ST_CR_SRVR_DONE_A:
302 case SSL3_ST_CR_SRVR_DONE_B:
303 ret=ssl3_get_server_done(s);
304 if (ret <= 0) goto end;
305 if (s->s3->tmp.cert_req)
306 s->state=SSL3_ST_CW_CERT_A;
307 else
308 s->state=SSL3_ST_CW_KEY_EXCH_A;
309 s->init_num=0;
310
311 break;
312
313 case SSL3_ST_CW_CERT_A:
314 case SSL3_ST_CW_CERT_B:
315 case SSL3_ST_CW_CERT_C:
316 case SSL3_ST_CW_CERT_D:
317 ret=ssl3_send_client_certificate(s);
318 if (ret <= 0) goto end;
319 s->state=SSL3_ST_CW_KEY_EXCH_A;
320 s->init_num=0;
321 break;
322
323 case SSL3_ST_CW_KEY_EXCH_A:
324 case SSL3_ST_CW_KEY_EXCH_B:
325 ret=ssl3_send_client_key_exchange(s);
326 if (ret <= 0) goto end;
327 l=s->s3->tmp.new_cipher->algorithms;
328 /* EAY EAY EAY need to check for DH fix cert
329 * sent back */
330 /* For TLS, cert_req is set to 2, so a cert chain
331 * of nothing is sent, but no verify packet is sent */
332 if (s->s3->tmp.cert_req == 1)
333 {
334 s->state=SSL3_ST_CW_CERT_VRFY_A;
335 }
336 else
337 {
338 s->state=SSL3_ST_CW_CHANGE_A;
339 s->s3->change_cipher_spec=0;
340 }
341
342 s->init_num=0;
343 break;
344
345 case SSL3_ST_CW_CERT_VRFY_A:
346 case SSL3_ST_CW_CERT_VRFY_B:
347 ret=ssl3_send_client_verify(s);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CW_CHANGE_A;
350 s->init_num=0;
351 s->s3->change_cipher_spec=0;
352 break;
353
354 case SSL3_ST_CW_CHANGE_A:
355 case SSL3_ST_CW_CHANGE_B:
356 ret=ssl3_send_change_cipher_spec(s,
357 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
358 if (ret <= 0) goto end;
359 s->state=SSL3_ST_CW_FINISHED_A;
360 s->init_num=0;
361
362 s->session->cipher=s->s3->tmp.new_cipher;
363 if (s->s3->tmp.new_compression == NULL)
364 s->session->compress_meth=0;
365 else
366 s->session->compress_meth=
367 s->s3->tmp.new_compression->id;
368 if (!s->method->ssl3_enc->setup_key_block(s))
369 {
370 ret= -1;
371 goto end;
372 }
373
374 if (!s->method->ssl3_enc->change_cipher_state(s,
375 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
376 {
377 ret= -1;
378 goto end;
379 }
380
381 break;
382
383 case SSL3_ST_CW_FINISHED_A:
384 case SSL3_ST_CW_FINISHED_B:
385 ret=ssl3_send_finished(s,
386 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
387 s->method->ssl3_enc->client_finished_label,
388 s->method->ssl3_enc->client_finished_label_len);
389 if (ret <= 0) goto end;
390 s->state=SSL3_ST_CW_FLUSH;
391
392 /* clear flags */
393 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
394 if (s->hit)
395 {
396 s->s3->tmp.next_state=SSL_ST_OK;
397 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
398 {
399 s->state=SSL_ST_OK;
400 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
401 s->s3->delay_buf_pop_ret=0;
402 }
403 }
404 else
405 {
406 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
407 }
408 s->init_num=0;
409 break;
410
411 case SSL3_ST_CR_FINISHED_A:
412 case SSL3_ST_CR_FINISHED_B:
413
414 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
415 SSL3_ST_CR_FINISHED_B);
416 if (ret <= 0) goto end;
417
418 if (s->hit)
419 s->state=SSL3_ST_CW_CHANGE_A;
420 else
421 s->state=SSL_ST_OK;
422 s->init_num=0;
423 break;
424
425 case SSL3_ST_CW_FLUSH:
426 /* number of bytes to be flushed */
427 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
428 if (num1 > 0)
429 {
430 s->rwstate=SSL_WRITING;
431 num1=BIO_flush(s->wbio);
432 if (num1 <= 0) { ret= -1; goto end; }
433 s->rwstate=SSL_NOTHING;
434 }
435
436 s->state=s->s3->tmp.next_state;
437 break;
438
439 case SSL_ST_OK:
440 /* clean a few things up */
441 ssl3_cleanup_key_block(s);
442
443 if (s->init_buf != NULL)
444 {
445 BUF_MEM_free(s->init_buf);
446 s->init_buf=NULL;
447 }
448
449 /* If we are not 'joining' the last two packets,
450 * remove the buffering now */
451 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
452 ssl_free_wbio_buffer(s);
453 /* else do it later in ssl3_write */
454
455 s->init_num=0;
456 s->new_session=0;
457
458 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
459 if (s->hit) s->ctx->stats.sess_hit++;
460
461 ret=1;
462 /* s->server=0; */
463 s->handshake_func=ssl3_connect;
464 s->ctx->stats.sess_connect_good++;
465
466 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
467
468 goto end;
469 /* break; */
470
471 default:
472 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
473 ret= -1;
474 goto end;
475 /* break; */
476 }
477
478 /* did we do anything */
479 if (!s->s3->tmp.reuse_message && !skip)
480 {
481 if (s->debug)
482 {
483 if ((ret=BIO_flush(s->wbio)) <= 0)
484 goto end;
485 }
486
487 if ((cb != NULL) && (s->state != state))
488 {
489 new_state=s->state;
490 s->state=state;
491 cb(s,SSL_CB_CONNECT_LOOP,1);
492 s->state=new_state;
493 }
494 }
495 skip=0;
496 }
497end:
498 s->in_handshake--;
499 if (cb != NULL)
500 cb(s,SSL_CB_CONNECT_EXIT,ret);
501 return(ret);
502 }
503
504
505static int ssl3_client_hello(SSL *s)
506 {
507 unsigned char *buf;
508 unsigned char *p,*d;
509 int i,j;
510 unsigned long Time,l;
511 SSL_COMP *comp;
512
513 buf=(unsigned char *)s->init_buf->data;
514 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
515 {
516 if ((s->session == NULL) ||
517 (s->session->ssl_version != s->version) ||
518 (s->session->not_resumable))
519 {
520 if (!ssl_get_new_session(s,0))
521 goto err;
522 }
523 /* else use the pre-loaded session */
524
525 p=s->s3->client_random;
526 Time=time(NULL); /* Time */
527 l2n(Time,p);
528 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
529
530 /* Do the message type and length last */
531 d=p= &(buf[4]);
532
533 *(p++)=s->version>>8;
534 *(p++)=s->version&0xff;
535 s->client_version=s->version;
536
537 /* Random stuff */
538 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
539 p+=SSL3_RANDOM_SIZE;
540
541 /* Session ID */
542 if (s->new_session)
543 i=0;
544 else
545 i=s->session->session_id_length;
546 *(p++)=i;
547 if (i != 0)
548 {
|
550 memcpy(p,s->session->session_id,i);
551 p+=i;
552 }
553
554 /* Ciphers supported */
555 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
556 if (i == 0)
557 {
558 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
559 goto err;
560 }
561 s2n(i,p);
562 p+=i;
563
564 /* COMPRESSION */
565 if (s->ctx->comp_methods == NULL)
566 j=0;
567 else
568 j=sk_SSL_COMP_num(s->ctx->comp_methods);
569 *(p++)=1+j;
570 for (i=0; i<j; i++)
571 {
572 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
573 *(p++)=comp->id;
574 }
575 *(p++)=0; /* Add the NULL method */
576
577 l=(p-d);
578 d=buf;
579 *(d++)=SSL3_MT_CLIENT_HELLO;
580 l2n3(l,d);
581
582 s->state=SSL3_ST_CW_CLNT_HELLO_B;
583 /* number of bytes to write */
584 s->init_num=p-buf;
585 s->init_off=0;
586 }
587
588 /* SSL3_ST_CW_CLNT_HELLO_B */
589 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
590err:
591 return(-1);
592 }
593
594static int ssl3_get_server_hello(SSL *s)
595 {
596 STACK_OF(SSL_CIPHER) *sk;
597 SSL_CIPHER *c;
598 unsigned char *p,*d;
599 int i,al,ok;
600 unsigned int j;
601 long n;
602 SSL_COMP *comp;
603
604 n=ssl3_get_message(s,
605 SSL3_ST_CR_SRVR_HELLO_A,
606 SSL3_ST_CR_SRVR_HELLO_B,
607 SSL3_MT_SERVER_HELLO,
608 300, /* ?? */
609 &ok);
610
611 if (!ok) return((int)n);
612 d=p=(unsigned char *)s->init_buf->data;
613
614 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
615 {
616 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
617 s->version=(s->version&0xff00)|p[1];
618 al=SSL_AD_PROTOCOL_VERSION;
619 goto f_err;
620 }
621 p+=2;
622
623 /* load the server hello data */
624 /* load the server random */
625 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
626 p+=SSL3_RANDOM_SIZE;
627
628 /* get the session-id */
629 j= *(p++);
630
631 if(j > sizeof s->session->session_id)
632 {
633 al=SSL_AD_ILLEGAL_PARAMETER;
634 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
635 SSL_R_SSL3_SESSION_ID_TOO_LONG);
636 goto f_err;
637 }
638
639 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
640 {
641 /* SSLref returns 16 :-( */
642 if (j < SSL2_SSL_SESSION_ID_LENGTH)
643 {
644 al=SSL_AD_ILLEGAL_PARAMETER;
645 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
646 goto f_err;
647 }
648 }
649 if (j != 0 && j == s->session->session_id_length
650 && memcmp(p,s->session->session_id,j) == 0)
651 {
652 if(s->sid_ctx_length != s->session->sid_ctx_length
653 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
654 {
655 al=SSL_AD_ILLEGAL_PARAMETER;
656 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
657 goto f_err;
658 }
659 s->hit=1;
660 }
661 else /* a miss or crap from the other end */
662 {
663 /* If we were trying for session-id reuse, make a new
664 * SSL_SESSION so we don't stuff up other people */
665 s->hit=0;
666 if (s->session->session_id_length > 0)
667 {
668 if (!ssl_get_new_session(s,0))
669 {
670 al=SSL_AD_INTERNAL_ERROR;
671 goto f_err;
672 }
673 }
674 s->session->session_id_length=j;
675 memcpy(s->session->session_id,p,j); /* j could be 0 */
676 }
677 p+=j;
678 c=ssl_get_cipher_by_char(s,p);
679 if (c == NULL)
680 {
681 /* unknown cipher */
682 al=SSL_AD_ILLEGAL_PARAMETER;
683 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
684 goto f_err;
685 }
686 p+=ssl_put_cipher_by_char(s,NULL,NULL);
687
688 sk=ssl_get_ciphers_by_id(s);
689 i=sk_SSL_CIPHER_find(sk,c);
690 if (i < 0)
691 {
692 /* we did not say we would use this cipher */
693 al=SSL_AD_ILLEGAL_PARAMETER;
694 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
695 goto f_err;
696 }
697
698 if (s->hit && (s->session->cipher != c))
699 {
700 if (!(s->options &
701 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
702 {
703 al=SSL_AD_ILLEGAL_PARAMETER;
704 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
705 goto f_err;
706 }
707 }
708 s->s3->tmp.new_cipher=c;
709
710 /* lets get the compression algorithm */
711 /* COMPRESSION */
712 j= *(p++);
713 if (j == 0)
714 comp=NULL;
715 else
716 comp=ssl3_comp_find(s->ctx->comp_methods,j);
717
718 if ((j != 0) && (comp == NULL))
719 {
720 al=SSL_AD_ILLEGAL_PARAMETER;
721 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
722 goto f_err;
723 }
724 else
725 {
726 s->s3->tmp.new_compression=comp;
727 }
728
729 if (p != (d+n))
730 {
731 /* wrong packet length */
732 al=SSL_AD_DECODE_ERROR;
733 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
734 goto err;
735 }
736
737 return(1);
738f_err:
739 ssl3_send_alert(s,SSL3_AL_FATAL,al);
740err:
741 return(-1);
742 }
743
744static int ssl3_get_server_certificate(SSL *s)
745 {
746 int al,i,ok,ret= -1;
747 unsigned long n,nc,llen,l;
748 X509 *x=NULL;
749 unsigned char *p,*d,*q;
750 STACK_OF(X509) *sk=NULL;
751 SESS_CERT *sc;
752 EVP_PKEY *pkey=NULL;
753
754 n=ssl3_get_message(s,
755 SSL3_ST_CR_CERT_A,
756 SSL3_ST_CR_CERT_B,
757 -1,
758#if defined(MSDOS) && !defined(WIN32)
759 1024*30, /* 30k max cert list :-) */
760#else
761 1024*100, /* 100k max cert list :-) */
762#endif
763 &ok);
764
765 if (!ok) return((int)n);
766
767 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
768 {
769 s->s3->tmp.reuse_message=1;
770 return(1);
771 }
772
773 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
774 {
775 al=SSL_AD_UNEXPECTED_MESSAGE;
776 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
777 goto f_err;
778 }
779 d=p=(unsigned char *)s->init_buf->data;
780
781 if ((sk=sk_X509_new_null()) == NULL)
782 {
783 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
784 goto err;
785 }
786
787 n2l3(p,llen);
788 if (llen+3 != n)
789 {
790 al=SSL_AD_DECODE_ERROR;
791 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
792 goto f_err;
793 }
794 for (nc=0; nc<llen; )
795 {
796 n2l3(p,l);
797 if ((l+nc+3) > llen)
798 {
799 al=SSL_AD_DECODE_ERROR;
800 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
801 goto f_err;
802 }
803
804 q=p;
805 x=d2i_X509(NULL,&q,l);
806 if (x == NULL)
807 {
808 al=SSL_AD_BAD_CERTIFICATE;
809 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
810 goto f_err;
811 }
812 if (q != (p+l))
813 {
814 al=SSL_AD_DECODE_ERROR;
815 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
816 goto f_err;
817 }
818 if (!sk_X509_push(sk,x))
819 {
820 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
821 goto err;
822 }
823 x=NULL;
824 nc+=l+3;
825 p=q;
826 }
827
828 i=ssl_verify_cert_chain(s,sk);
829 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
830 {
831 al=ssl_verify_alarm_type(s->verify_result);
832 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
833 goto f_err;
834 }
835 ERR_clear_error(); /* but we keep s->verify_result */
836
837 sc=ssl_sess_cert_new();
838 if (sc == NULL) goto err;
839
840 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
841 s->session->sess_cert=sc;
842
843 sc->cert_chain=sk;
844 /* Inconsistency alert: cert_chain does include the peer's
845 * certificate, which we don't include in s3_srvr.c */
846 x=sk_X509_value(sk,0);
847 sk=NULL;
848
849 pkey=X509_get_pubkey(x);
850
851 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
852 {
853 x=NULL;
854 al=SSL3_AL_FATAL;
855 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
856 goto f_err;
857 }
858
859 i=ssl_cert_type(x,pkey);
860 if (i < 0)
861 {
862 x=NULL;
863 al=SSL3_AL_FATAL;
864 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
865 goto f_err;
866 }
867
868 sc->peer_cert_type=i;
869 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
870 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
871 * We just created sc a couple of
872 * lines ago. */
873 X509_free(sc->peer_pkeys[i].x509);
874 sc->peer_pkeys[i].x509=x;
875 sc->peer_key= &(sc->peer_pkeys[i]);
876
877 if (s->session->peer != NULL)
878 X509_free(s->session->peer);
879 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
880 s->session->peer=x;
881 s->session->verify_result = s->verify_result;
882
883 x=NULL;
884 ret=1;
885
886 if (0)
887 {
888f_err:
889 ssl3_send_alert(s,SSL3_AL_FATAL,al);
890 }
891err:
892 EVP_PKEY_free(pkey);
893 X509_free(x);
894 sk_X509_pop_free(sk,X509_free);
895 return(ret);
896 }
897
898static int ssl3_get_key_exchange(SSL *s)
899 {
900#ifndef NO_RSA
901 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
902#endif
903 EVP_MD_CTX md_ctx;
904 unsigned char *param,*p;
905 int al,i,j,param_len,ok;
906 long n,alg;
907 EVP_PKEY *pkey=NULL;
908#ifndef NO_RSA
909 RSA *rsa=NULL;
910#endif
911#ifndef NO_DH
912 DH *dh=NULL;
913#endif
914
915 /* use same message size as in ssl3_get_certificate_request()
916 * as ServerKeyExchange message may be skipped */
917 n=ssl3_get_message(s,
918 SSL3_ST_CR_KEY_EXCH_A,
919 SSL3_ST_CR_KEY_EXCH_B,
920 -1,
921#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
922 1024*30, /* 30k max cert list :-) */
923#else
924 1024*100, /* 100k max cert list :-) */
925#endif
926 &ok);
927
928 if (!ok) return((int)n);
929
930 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
931 {
932 s->s3->tmp.reuse_message=1;
933 return(1);
934 }
935
936 param=p=(unsigned char *)s->init_buf->data;
937
938 if (s->session->sess_cert != NULL)
939 {
940#ifndef NO_RSA
941 if (s->session->sess_cert->peer_rsa_tmp != NULL)
942 {
943 RSA_free(s->session->sess_cert->peer_rsa_tmp);
944 s->session->sess_cert->peer_rsa_tmp=NULL;
945 }
946#endif
947#ifndef NO_DH
948 if (s->session->sess_cert->peer_dh_tmp)
949 {
950 DH_free(s->session->sess_cert->peer_dh_tmp);
951 s->session->sess_cert->peer_dh_tmp=NULL;
952 }
953#endif
954 }
955 else
956 {
957 s->session->sess_cert=ssl_sess_cert_new();
958 }
959
960 param_len=0;
961 alg=s->s3->tmp.new_cipher->algorithms;
962
963#ifndef NO_RSA
964 if (alg & SSL_kRSA)
965 {
966 if ((rsa=RSA_new()) == NULL)
967 {
968 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
969 goto err;
970 }
971 n2s(p,i);
972 param_len=i+2;
973 if (param_len > n)
974 {
975 al=SSL_AD_DECODE_ERROR;
976 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
977 goto f_err;
978 }
979 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
980 {
981 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
982 goto err;
983 }
984 p+=i;
985
986 n2s(p,i);
987 param_len+=i+2;
988 if (param_len > n)
989 {
990 al=SSL_AD_DECODE_ERROR;
991 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
992 goto f_err;
993 }
994 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
995 {
996 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
997 goto err;
998 }
999 p+=i;
1000 n-=param_len;
1001
1002 /* this should be because we are using an export cipher */
1003 if (alg & SSL_aRSA)
1004 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1005 else
1006 {
1007 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1008 goto err;
1009 }
1010 s->session->sess_cert->peer_rsa_tmp=rsa;
1011 rsa=NULL;
1012 }
1013#else /* NO_RSA */
1014 if (0)
1015 ;
1016#endif
1017#ifndef NO_DH
1018 else if (alg & SSL_kEDH)
1019 {
1020 if ((dh=DH_new()) == NULL)
1021 {
1022 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1023 goto err;
1024 }
1025 n2s(p,i);
1026 param_len=i+2;
1027 if (param_len > n)
1028 {
1029 al=SSL_AD_DECODE_ERROR;
1030 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1031 goto f_err;
1032 }
1033 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1034 {
1035 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1036 goto err;
1037 }
1038 p+=i;
1039
1040 n2s(p,i);
1041 param_len+=i+2;
1042 if (param_len > n)
1043 {
1044 al=SSL_AD_DECODE_ERROR;
1045 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1046 goto f_err;
1047 }
1048 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1049 {
1050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1051 goto err;
1052 }
1053 p+=i;
1054
1055 n2s(p,i);
1056 param_len+=i+2;
1057 if (param_len > n)
1058 {
1059 al=SSL_AD_DECODE_ERROR;
1060 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1061 goto f_err;
1062 }
1063 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1064 {
1065 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1066 goto err;
1067 }
1068 p+=i;
1069 n-=param_len;
1070
1071#ifndef NO_RSA
1072 if (alg & SSL_aRSA)
1073 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1074#else
1075 if (0)
1076 ;
1077#endif
1078#ifndef NO_DSA
1079 else if (alg & SSL_aDSS)
1080 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1081#endif
1082 /* else anonymous DH, so no certificate or pkey. */
1083
1084 s->session->sess_cert->peer_dh_tmp=dh;
1085 dh=NULL;
1086 }
1087 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1088 {
1089 al=SSL_AD_ILLEGAL_PARAMETER;
1090 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1091 goto f_err;
1092 }
1093#endif /* !NO_DH */
1094 if (alg & SSL_aFZA)
1095 {
1096 al=SSL_AD_HANDSHAKE_FAILURE;
1097 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1098 goto f_err;
1099 }
1100
1101
1102 /* p points to the next byte, there are 'n' bytes left */
1103
1104
1105 /* if it was signed, check the signature */
1106 if (pkey != NULL)
1107 {
1108 n2s(p,i);
1109 n-=2;
1110 j=EVP_PKEY_size(pkey);
1111
1112 if ((i != n) || (n > j) || (n <= 0))
1113 {
1114 /* wrong packet length */
1115 al=SSL_AD_DECODE_ERROR;
1116 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1117 goto f_err;
1118 }
1119
1120#ifndef NO_RSA
1121 if (pkey->type == EVP_PKEY_RSA)
1122 {
1123 int num;
1124
1125 j=0;
1126 q=md_buf;
1127 for (num=2; num > 0; num--)
1128 {
1129 EVP_DigestInit(&md_ctx,(num == 2)
1130 ?s->ctx->md5:s->ctx->sha1);
1131 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1132 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1133 EVP_DigestUpdate(&md_ctx,param,param_len);
1134 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1135 q+=i;
1136 j+=i;
1137 }
1138 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1139 pkey->pkey.rsa);
1140 if (i < 0)
1141 {
1142 al=SSL_AD_DECRYPT_ERROR;
1143 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1144 goto f_err;
1145 }
1146 if (i == 0)
1147 {
1148 /* bad signature */
1149 al=SSL_AD_DECRYPT_ERROR;
1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1151 goto f_err;
1152 }
1153 }
1154 else
1155#endif
1156#ifndef NO_DSA
1157 if (pkey->type == EVP_PKEY_DSA)
1158 {
1159 /* lets do DSS */
1160 EVP_VerifyInit(&md_ctx,EVP_dss1());
1161 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1162 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1163 EVP_VerifyUpdate(&md_ctx,param,param_len);
1164 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1165 {
1166 /* bad signature */
1167 al=SSL_AD_DECRYPT_ERROR;
1168 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1169 goto f_err;
1170 }
1171 }
1172 else
1173#endif
1174 {
1175 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1176 goto err;
1177 }
1178 }
1179 else
1180 {
1181 /* still data left over */
1182 if (!(alg & SSL_aNULL))
1183 {
1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1185 goto err;
1186 }
1187 if (n != 0)
1188 {
1189 al=SSL_AD_DECODE_ERROR;
1190 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1191 goto f_err;
1192 }
1193 }
1194 EVP_PKEY_free(pkey);
1195 return(1);
1196f_err:
1197 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1198err:
1199 EVP_PKEY_free(pkey);
1200#ifndef NO_RSA
1201 if (rsa != NULL)
1202 RSA_free(rsa);
1203#endif
1204#ifndef NO_DH
1205 if (dh != NULL)
1206 DH_free(dh);
1207#endif
1208 return(-1);
1209 }
1210
1211static int ssl3_get_certificate_request(SSL *s)
1212 {
1213 int ok,ret=0;
1214 unsigned long n,nc,l;
1215 unsigned int llen,ctype_num,i;
1216 X509_NAME *xn=NULL;
1217 unsigned char *p,*d,*q;
1218 STACK_OF(X509_NAME) *ca_sk=NULL;
1219
1220 n=ssl3_get_message(s,
1221 SSL3_ST_CR_CERT_REQ_A,
1222 SSL3_ST_CR_CERT_REQ_B,
1223 -1,
1224#if defined(MSDOS) && !defined(WIN32)
1225 1024*30, /* 30k max cert list :-) */
1226#else
1227 1024*100, /* 100k max cert list :-) */
1228#endif
1229 &ok);
1230
1231 if (!ok) return((int)n);
1232
1233 s->s3->tmp.cert_req=0;
1234
1235 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1236 {
1237 s->s3->tmp.reuse_message=1;
1238 return(1);
1239 }
1240
1241 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1242 {
1243 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1244 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1245 goto err;
1246 }
1247
1248 /* TLS does not like anon-DH with client cert */
1249 if (s->version > SSL3_VERSION)
1250 {
1251 l=s->s3->tmp.new_cipher->algorithms;
1252 if (l & SSL_aNULL)
1253 {
1254 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1255 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1256 goto err;
1257 }
1258 }
1259
1260 d=p=(unsigned char *)s->init_buf->data;
1261
1262 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1263 {
1264 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1265 goto err;
1266 }
1267
1268 /* get the certificate types */
1269 ctype_num= *(p++);
1270 if (ctype_num > SSL3_CT_NUMBER)
1271 ctype_num=SSL3_CT_NUMBER;
1272 for (i=0; i<ctype_num; i++)
1273 s->s3->tmp.ctype[i]= p[i];
1274 p+=ctype_num;
1275
1276 /* get the CA RDNs */
1277 n2s(p,llen);
1278#if 0
1279{
1280FILE *out;
1281out=fopen("/tmp/vsign.der","w");
1282fwrite(p,1,llen,out);
1283fclose(out);
1284}
1285#endif
1286
1287 if ((llen+ctype_num+2+1) != n)
1288 {
1289 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1290 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1291 goto err;
1292 }
1293
1294 for (nc=0; nc<llen; )
1295 {
1296 n2s(p,l);
1297 if ((l+nc+2) > llen)
1298 {
1299 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1300 goto cont; /* netscape bugs */
1301 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1302 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1303 goto err;
1304 }
1305
1306 q=p;
1307
1308 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1309 {
1310 /* If netscape tolerance is on, ignore errors */
1311 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1312 goto cont;
1313 else
1314 {
1315 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1316 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1317 goto err;
1318 }
1319 }
1320
1321 if (q != (p+l))
1322 {
1323 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1324 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1325 goto err;
1326 }
1327 if (!sk_X509_NAME_push(ca_sk,xn))
1328 {
1329 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1330 goto err;
1331 }
1332
1333 p+=l;
1334 nc+=l+2;
1335 }
1336
1337 if (0)
1338 {
1339cont:
1340 ERR_clear_error();
1341 }
1342
1343 /* we should setup a certificate to return.... */
1344 s->s3->tmp.cert_req=1;
1345 s->s3->tmp.ctype_num=ctype_num;
1346 if (s->s3->tmp.ca_names != NULL)
1347 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1348 s->s3->tmp.ca_names=ca_sk;
1349 ca_sk=NULL;
1350
1351 ret=1;
1352err:
1353 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1354 return(ret);
1355 }
1356
1357static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1358 {
1359 return(X509_NAME_cmp(*a,*b));
1360 }
1361
1362static int ssl3_get_server_done(SSL *s)
1363 {
1364 int ok,ret=0;
1365 long n;
1366
1367 n=ssl3_get_message(s,
1368 SSL3_ST_CR_SRVR_DONE_A,
1369 SSL3_ST_CR_SRVR_DONE_B,
1370 SSL3_MT_SERVER_DONE,
1371 30, /* should be very small, like 0 :-) */
1372 &ok);
1373
1374 if (!ok) return((int)n);
1375 if (n > 0)
1376 {
1377 /* should contain no data */
1378 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1379 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1380 return -1;
1381 }
1382 ret=1;
1383 return(ret);
1384 }
1385
1386static int ssl3_send_client_key_exchange(SSL *s)
1387 {
1388 unsigned char *p,*d;
1389 int n;
1390 unsigned long l;
1391#ifndef NO_RSA
1392 unsigned char *q;
1393 EVP_PKEY *pkey=NULL;
1394#endif
1395
1396 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1397 {
1398 d=(unsigned char *)s->init_buf->data;
1399 p= &(d[4]);
1400
1401 l=s->s3->tmp.new_cipher->algorithms;
1402
1403#ifndef NO_RSA
1404 if (l & SSL_kRSA)
1405 {
1406 RSA *rsa;
1407 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1408
1409 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1410 rsa=s->session->sess_cert->peer_rsa_tmp;
1411 else
1412 {
1413 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1414 if ((pkey == NULL) ||
1415 (pkey->type != EVP_PKEY_RSA) ||
1416 (pkey->pkey.rsa == NULL))
1417 {
1418 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1419 goto err;
1420 }
1421 rsa=pkey->pkey.rsa;
1422 EVP_PKEY_free(pkey);
1423 }
1424
1425 tmp_buf[0]=s->client_version>>8;
1426 tmp_buf[1]=s->client_version&0xff;
1427 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1428 goto err;
1429
1430 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1431
1432 q=p;
1433 /* Fix buf for TLS and beyond */
1434 if (s->version > SSL3_VERSION)
1435 p+=2;
1436 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1437 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1438#ifdef PKCS1_CHECK
1439 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1440 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1441#endif
1442 if (n <= 0)
1443 {
1444 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1445 goto err;
1446 }
1447
1448 /* Fix buf for TLS and beyond */
1449 if (s->version > SSL3_VERSION)
1450 {
1451 s2n(n,q);
1452 n+=2;
1453 }
1454
1455 s->session->master_key_length=
1456 s->method->ssl3_enc->generate_master_secret(s,
1457 s->session->master_key,
1458 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1459 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1460 }
1461 else
1462#endif
1463#ifndef NO_DH
1464 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1465 {
1466 DH *dh_srvr,*dh_clnt;
1467
1468 if (s->session->sess_cert->peer_dh_tmp != NULL)
1469 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1470 else
1471 {
1472 /* we get them from the cert */
1473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1474 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1475 goto err;
1476 }
1477
1478 /* generate a new random key */
1479 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1480 {
1481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1482 goto err;
1483 }
1484 if (!DH_generate_key(dh_clnt))
1485 {
1486 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1487 goto err;
1488 }
1489
1490 /* use the 'p' output buffer for the DH key, but
1491 * make sure to clear it out afterwards */
1492
1493 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1494
1495 if (n <= 0)
1496 {
1497 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1498 goto err;
1499 }
1500
1501 /* generate master key from the result */
1502 s->session->master_key_length=
1503 s->method->ssl3_enc->generate_master_secret(s,
1504 s->session->master_key,p,n);
1505 /* clean up */
1506 memset(p,0,n);
1507
1508 /* send off the data */
1509 n=BN_num_bytes(dh_clnt->pub_key);
1510 s2n(n,p);
1511 BN_bn2bin(dh_clnt->pub_key,p);
1512 n+=2;
1513
1514 DH_free(dh_clnt);
1515
1516 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1517 }
1518 else
1519#endif
1520 {
1521 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1522 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1523 goto err;
1524 }
1525
1526 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1527 l2n3(n,d);
1528
1529 s->state=SSL3_ST_CW_KEY_EXCH_B;
1530 /* number of bytes to write */
1531 s->init_num=n+4;
1532 s->init_off=0;
1533 }
1534
1535 /* SSL3_ST_CW_KEY_EXCH_B */
1536 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1537err:
1538 return(-1);
1539 }
1540
1541static int ssl3_send_client_verify(SSL *s)
1542 {
1543 unsigned char *p,*d;
1544 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1545 EVP_PKEY *pkey;
1546#ifndef NO_RSA
1547 unsigned u=0;
1548#endif
1549 unsigned long n;
1550#ifndef NO_DSA
1551 int j;
1552#endif
1553
1554 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1555 {
1556 d=(unsigned char *)s->init_buf->data;
1557 p= &(d[4]);
1558 pkey=s->cert->key->privatekey;
1559
1560 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1561 &(data[MD5_DIGEST_LENGTH]));
1562
1563#ifndef NO_RSA
1564 if (pkey->type == EVP_PKEY_RSA)
1565 {
1566 s->method->ssl3_enc->cert_verify_mac(s,
1567 &(s->s3->finish_dgst1),&(data[0]));
1568 if (RSA_sign(NID_md5_sha1, data,
1569 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1570 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1571 {
1572 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1573 goto err;
1574 }
1575 s2n(u,p);
1576 n=u+2;
1577 }
1578 else
1579#endif
1580#ifndef NO_DSA
1581 if (pkey->type == EVP_PKEY_DSA)
1582 {
1583 if (!DSA_sign(pkey->save_type,
1584 &(data[MD5_DIGEST_LENGTH]),
1585 SHA_DIGEST_LENGTH,&(p[2]),
1586 (unsigned int *)&j,pkey->pkey.dsa))
1587 {
1588 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1589 goto err;
1590 }
1591 s2n(j,p);
1592 n=j+2;
1593 }
1594 else
1595#endif
1596 {
1597 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1598 goto err;
1599 }
1600 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1601 l2n3(n,d);
1602
1603 s->init_num=(int)n+4;
1604 s->init_off=0;
1605 }
1606 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1607err:
1608 return(-1);
1609 }
1610
1611static int ssl3_send_client_certificate(SSL *s)
1612 {
1613 X509 *x509=NULL;
1614 EVP_PKEY *pkey=NULL;
1615 int i;
1616 unsigned long l;
1617
1618 if (s->state == SSL3_ST_CW_CERT_A)
1619 {
1620 if ((s->cert == NULL) ||
1621 (s->cert->key->x509 == NULL) ||
1622 (s->cert->key->privatekey == NULL))
1623 s->state=SSL3_ST_CW_CERT_B;
1624 else
1625 s->state=SSL3_ST_CW_CERT_C;
1626 }
1627
1628 /* We need to get a client cert */
1629 if (s->state == SSL3_ST_CW_CERT_B)
1630 {
1631 /* If we get an error, we need to
1632 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1633 * We then get retied later */
1634 i=0;
1635 if (s->ctx->client_cert_cb != NULL)
1636 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1637 if (i < 0)
1638 {
1639 s->rwstate=SSL_X509_LOOKUP;
1640 return(-1);
1641 }
1642 s->rwstate=SSL_NOTHING;
1643 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1644 {
1645 s->state=SSL3_ST_CW_CERT_B;
1646 if ( !SSL_use_certificate(s,x509) ||
1647 !SSL_use_PrivateKey(s,pkey))
1648 i=0;
1649 }
1650 else if (i == 1)
1651 {
1652 i=0;
1653 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1654 }
1655
1656 if (x509 != NULL) X509_free(x509);
1657 if (pkey != NULL) EVP_PKEY_free(pkey);
1658 if (i == 0)
1659 {
1660 if (s->version == SSL3_VERSION)
1661 {
1662 s->s3->tmp.cert_req=0;
1663 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1664 return(1);
1665 }
1666 else
1667 {
1668 s->s3->tmp.cert_req=2;
1669 }
1670 }
1671
1672 /* Ok, we have a cert */
1673 s->state=SSL3_ST_CW_CERT_C;
1674 }
1675
1676 if (s->state == SSL3_ST_CW_CERT_C)
1677 {
1678 s->state=SSL3_ST_CW_CERT_D;
1679 l=ssl3_output_cert_chain(s,
1680 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1681 s->init_num=(int)l;
1682 s->init_off=0;
1683 }
1684 /* SSL3_ST_CW_CERT_D */
1685 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1686 }
1687
1688#define has_bits(i,m) (((i)&(m)) == (m))
1689
1690static int ssl3_check_cert_and_algorithm(SSL *s)
1691 {
1692 int i,idx;
1693 long algs;
1694 EVP_PKEY *pkey=NULL;
1695 SESS_CERT *sc;
1696#ifndef NO_RSA
1697 RSA *rsa;
1698#endif
1699#ifndef NO_DH
1700 DH *dh;
1701#endif
1702
1703 sc=s->session->sess_cert;
1704
1705 if (sc == NULL)
1706 {
1707 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1708 goto err;
1709 }
1710
1711 algs=s->s3->tmp.new_cipher->algorithms;
1712
1713 /* we don't have a certificate */
1714 if (algs & (SSL_aDH|SSL_aNULL))
1715 return(1);
1716
1717#ifndef NO_RSA
1718 rsa=s->session->sess_cert->peer_rsa_tmp;
1719#endif
1720#ifndef NO_DH
1721 dh=s->session->sess_cert->peer_dh_tmp;
1722#endif
1723
1724 /* This is the passed certificate */
1725
1726 idx=sc->peer_cert_type;
1727 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1728 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1729 EVP_PKEY_free(pkey);
1730
1731
1732 /* Check that we have a certificate if we require one */
1733 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1734 {
1735 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1736 goto f_err;
1737 }
1738#ifndef NO_DSA
1739 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1740 {
1741 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1742 goto f_err;
1743 }
1744#endif
1745#ifndef NO_RSA
1746 if ((algs & SSL_kRSA) &&
1747 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1748 {
1749 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1750 goto f_err;
1751 }
1752#endif
1753#ifndef NO_DH
1754 if ((algs & SSL_kEDH) &&
1755 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1756 {
1757 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1758 goto f_err;
1759 }
1760 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1761 {
1762 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1763 goto f_err;
1764 }
1765#ifndef NO_DSA
1766 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1767 {
1768 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1769 goto f_err;
1770 }
1771#endif
1772#endif
1773
1774 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1775 {
1776#ifndef NO_RSA
1777 if (algs & SSL_kRSA)
1778 {
1779 if (rsa == NULL
1780 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1781 {
1782 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1783 goto f_err;
1784 }
1785 }
1786 else
1787#endif
1788#ifndef NO_DH
1789 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1790 {
1791 if (dh == NULL
1792 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1793 {
1794 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1795 goto f_err;
1796 }
1797 }
1798 else
1799#endif
1800 {
1801 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1802 goto f_err;
1803 }
1804 }
1805 return(1);
1806f_err:
1807 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1808err:
1809 return(0);
1810 }
1811
| 554 memcpy(p,s->session->session_id,i);
555 p+=i;
556 }
557
558 /* Ciphers supported */
559 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
560 if (i == 0)
561 {
562 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
563 goto err;
564 }
565 s2n(i,p);
566 p+=i;
567
568 /* COMPRESSION */
569 if (s->ctx->comp_methods == NULL)
570 j=0;
571 else
572 j=sk_SSL_COMP_num(s->ctx->comp_methods);
573 *(p++)=1+j;
574 for (i=0; i<j; i++)
575 {
576 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
577 *(p++)=comp->id;
578 }
579 *(p++)=0; /* Add the NULL method */
580
581 l=(p-d);
582 d=buf;
583 *(d++)=SSL3_MT_CLIENT_HELLO;
584 l2n3(l,d);
585
586 s->state=SSL3_ST_CW_CLNT_HELLO_B;
587 /* number of bytes to write */
588 s->init_num=p-buf;
589 s->init_off=0;
590 }
591
592 /* SSL3_ST_CW_CLNT_HELLO_B */
593 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
594err:
595 return(-1);
596 }
597
598static int ssl3_get_server_hello(SSL *s)
599 {
600 STACK_OF(SSL_CIPHER) *sk;
601 SSL_CIPHER *c;
602 unsigned char *p,*d;
603 int i,al,ok;
604 unsigned int j;
605 long n;
606 SSL_COMP *comp;
607
608 n=ssl3_get_message(s,
609 SSL3_ST_CR_SRVR_HELLO_A,
610 SSL3_ST_CR_SRVR_HELLO_B,
611 SSL3_MT_SERVER_HELLO,
612 300, /* ?? */
613 &ok);
614
615 if (!ok) return((int)n);
616 d=p=(unsigned char *)s->init_buf->data;
617
618 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
619 {
620 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
621 s->version=(s->version&0xff00)|p[1];
622 al=SSL_AD_PROTOCOL_VERSION;
623 goto f_err;
624 }
625 p+=2;
626
627 /* load the server hello data */
628 /* load the server random */
629 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
630 p+=SSL3_RANDOM_SIZE;
631
632 /* get the session-id */
633 j= *(p++);
634
635 if(j > sizeof s->session->session_id)
636 {
637 al=SSL_AD_ILLEGAL_PARAMETER;
638 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
639 SSL_R_SSL3_SESSION_ID_TOO_LONG);
640 goto f_err;
641 }
642
643 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
644 {
645 /* SSLref returns 16 :-( */
646 if (j < SSL2_SSL_SESSION_ID_LENGTH)
647 {
648 al=SSL_AD_ILLEGAL_PARAMETER;
649 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
650 goto f_err;
651 }
652 }
653 if (j != 0 && j == s->session->session_id_length
654 && memcmp(p,s->session->session_id,j) == 0)
655 {
656 if(s->sid_ctx_length != s->session->sid_ctx_length
657 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
658 {
659 al=SSL_AD_ILLEGAL_PARAMETER;
660 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
661 goto f_err;
662 }
663 s->hit=1;
664 }
665 else /* a miss or crap from the other end */
666 {
667 /* If we were trying for session-id reuse, make a new
668 * SSL_SESSION so we don't stuff up other people */
669 s->hit=0;
670 if (s->session->session_id_length > 0)
671 {
672 if (!ssl_get_new_session(s,0))
673 {
674 al=SSL_AD_INTERNAL_ERROR;
675 goto f_err;
676 }
677 }
678 s->session->session_id_length=j;
679 memcpy(s->session->session_id,p,j); /* j could be 0 */
680 }
681 p+=j;
682 c=ssl_get_cipher_by_char(s,p);
683 if (c == NULL)
684 {
685 /* unknown cipher */
686 al=SSL_AD_ILLEGAL_PARAMETER;
687 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
688 goto f_err;
689 }
690 p+=ssl_put_cipher_by_char(s,NULL,NULL);
691
692 sk=ssl_get_ciphers_by_id(s);
693 i=sk_SSL_CIPHER_find(sk,c);
694 if (i < 0)
695 {
696 /* we did not say we would use this cipher */
697 al=SSL_AD_ILLEGAL_PARAMETER;
698 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
699 goto f_err;
700 }
701
702 if (s->hit && (s->session->cipher != c))
703 {
704 if (!(s->options &
705 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
706 {
707 al=SSL_AD_ILLEGAL_PARAMETER;
708 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
709 goto f_err;
710 }
711 }
712 s->s3->tmp.new_cipher=c;
713
714 /* lets get the compression algorithm */
715 /* COMPRESSION */
716 j= *(p++);
717 if (j == 0)
718 comp=NULL;
719 else
720 comp=ssl3_comp_find(s->ctx->comp_methods,j);
721
722 if ((j != 0) && (comp == NULL))
723 {
724 al=SSL_AD_ILLEGAL_PARAMETER;
725 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
726 goto f_err;
727 }
728 else
729 {
730 s->s3->tmp.new_compression=comp;
731 }
732
733 if (p != (d+n))
734 {
735 /* wrong packet length */
736 al=SSL_AD_DECODE_ERROR;
737 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
738 goto err;
739 }
740
741 return(1);
742f_err:
743 ssl3_send_alert(s,SSL3_AL_FATAL,al);
744err:
745 return(-1);
746 }
747
748static int ssl3_get_server_certificate(SSL *s)
749 {
750 int al,i,ok,ret= -1;
751 unsigned long n,nc,llen,l;
752 X509 *x=NULL;
753 unsigned char *p,*d,*q;
754 STACK_OF(X509) *sk=NULL;
755 SESS_CERT *sc;
756 EVP_PKEY *pkey=NULL;
757
758 n=ssl3_get_message(s,
759 SSL3_ST_CR_CERT_A,
760 SSL3_ST_CR_CERT_B,
761 -1,
762#if defined(MSDOS) && !defined(WIN32)
763 1024*30, /* 30k max cert list :-) */
764#else
765 1024*100, /* 100k max cert list :-) */
766#endif
767 &ok);
768
769 if (!ok) return((int)n);
770
771 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
772 {
773 s->s3->tmp.reuse_message=1;
774 return(1);
775 }
776
777 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
778 {
779 al=SSL_AD_UNEXPECTED_MESSAGE;
780 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
781 goto f_err;
782 }
783 d=p=(unsigned char *)s->init_buf->data;
784
785 if ((sk=sk_X509_new_null()) == NULL)
786 {
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
788 goto err;
789 }
790
791 n2l3(p,llen);
792 if (llen+3 != n)
793 {
794 al=SSL_AD_DECODE_ERROR;
795 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
796 goto f_err;
797 }
798 for (nc=0; nc<llen; )
799 {
800 n2l3(p,l);
801 if ((l+nc+3) > llen)
802 {
803 al=SSL_AD_DECODE_ERROR;
804 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
805 goto f_err;
806 }
807
808 q=p;
809 x=d2i_X509(NULL,&q,l);
810 if (x == NULL)
811 {
812 al=SSL_AD_BAD_CERTIFICATE;
813 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
814 goto f_err;
815 }
816 if (q != (p+l))
817 {
818 al=SSL_AD_DECODE_ERROR;
819 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
820 goto f_err;
821 }
822 if (!sk_X509_push(sk,x))
823 {
824 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
825 goto err;
826 }
827 x=NULL;
828 nc+=l+3;
829 p=q;
830 }
831
832 i=ssl_verify_cert_chain(s,sk);
833 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
834 {
835 al=ssl_verify_alarm_type(s->verify_result);
836 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
837 goto f_err;
838 }
839 ERR_clear_error(); /* but we keep s->verify_result */
840
841 sc=ssl_sess_cert_new();
842 if (sc == NULL) goto err;
843
844 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
845 s->session->sess_cert=sc;
846
847 sc->cert_chain=sk;
848 /* Inconsistency alert: cert_chain does include the peer's
849 * certificate, which we don't include in s3_srvr.c */
850 x=sk_X509_value(sk,0);
851 sk=NULL;
852
853 pkey=X509_get_pubkey(x);
854
855 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
856 {
857 x=NULL;
858 al=SSL3_AL_FATAL;
859 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
860 goto f_err;
861 }
862
863 i=ssl_cert_type(x,pkey);
864 if (i < 0)
865 {
866 x=NULL;
867 al=SSL3_AL_FATAL;
868 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
869 goto f_err;
870 }
871
872 sc->peer_cert_type=i;
873 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
874 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
875 * We just created sc a couple of
876 * lines ago. */
877 X509_free(sc->peer_pkeys[i].x509);
878 sc->peer_pkeys[i].x509=x;
879 sc->peer_key= &(sc->peer_pkeys[i]);
880
881 if (s->session->peer != NULL)
882 X509_free(s->session->peer);
883 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
884 s->session->peer=x;
885 s->session->verify_result = s->verify_result;
886
887 x=NULL;
888 ret=1;
889
890 if (0)
891 {
892f_err:
893 ssl3_send_alert(s,SSL3_AL_FATAL,al);
894 }
895err:
896 EVP_PKEY_free(pkey);
897 X509_free(x);
898 sk_X509_pop_free(sk,X509_free);
899 return(ret);
900 }
901
902static int ssl3_get_key_exchange(SSL *s)
903 {
904#ifndef NO_RSA
905 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
906#endif
907 EVP_MD_CTX md_ctx;
908 unsigned char *param,*p;
909 int al,i,j,param_len,ok;
910 long n,alg;
911 EVP_PKEY *pkey=NULL;
912#ifndef NO_RSA
913 RSA *rsa=NULL;
914#endif
915#ifndef NO_DH
916 DH *dh=NULL;
917#endif
918
919 /* use same message size as in ssl3_get_certificate_request()
920 * as ServerKeyExchange message may be skipped */
921 n=ssl3_get_message(s,
922 SSL3_ST_CR_KEY_EXCH_A,
923 SSL3_ST_CR_KEY_EXCH_B,
924 -1,
925#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
926 1024*30, /* 30k max cert list :-) */
927#else
928 1024*100, /* 100k max cert list :-) */
929#endif
930 &ok);
931
932 if (!ok) return((int)n);
933
934 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
935 {
936 s->s3->tmp.reuse_message=1;
937 return(1);
938 }
939
940 param=p=(unsigned char *)s->init_buf->data;
941
942 if (s->session->sess_cert != NULL)
943 {
944#ifndef NO_RSA
945 if (s->session->sess_cert->peer_rsa_tmp != NULL)
946 {
947 RSA_free(s->session->sess_cert->peer_rsa_tmp);
948 s->session->sess_cert->peer_rsa_tmp=NULL;
949 }
950#endif
951#ifndef NO_DH
952 if (s->session->sess_cert->peer_dh_tmp)
953 {
954 DH_free(s->session->sess_cert->peer_dh_tmp);
955 s->session->sess_cert->peer_dh_tmp=NULL;
956 }
957#endif
958 }
959 else
960 {
961 s->session->sess_cert=ssl_sess_cert_new();
962 }
963
964 param_len=0;
965 alg=s->s3->tmp.new_cipher->algorithms;
966
967#ifndef NO_RSA
968 if (alg & SSL_kRSA)
969 {
970 if ((rsa=RSA_new()) == NULL)
971 {
972 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
973 goto err;
974 }
975 n2s(p,i);
976 param_len=i+2;
977 if (param_len > n)
978 {
979 al=SSL_AD_DECODE_ERROR;
980 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
981 goto f_err;
982 }
983 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
984 {
985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
986 goto err;
987 }
988 p+=i;
989
990 n2s(p,i);
991 param_len+=i+2;
992 if (param_len > n)
993 {
994 al=SSL_AD_DECODE_ERROR;
995 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
996 goto f_err;
997 }
998 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
999 {
1000 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1001 goto err;
1002 }
1003 p+=i;
1004 n-=param_len;
1005
1006 /* this should be because we are using an export cipher */
1007 if (alg & SSL_aRSA)
1008 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1009 else
1010 {
1011 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1012 goto err;
1013 }
1014 s->session->sess_cert->peer_rsa_tmp=rsa;
1015 rsa=NULL;
1016 }
1017#else /* NO_RSA */
1018 if (0)
1019 ;
1020#endif
1021#ifndef NO_DH
1022 else if (alg & SSL_kEDH)
1023 {
1024 if ((dh=DH_new()) == NULL)
1025 {
1026 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1027 goto err;
1028 }
1029 n2s(p,i);
1030 param_len=i+2;
1031 if (param_len > n)
1032 {
1033 al=SSL_AD_DECODE_ERROR;
1034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1035 goto f_err;
1036 }
1037 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1038 {
1039 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1040 goto err;
1041 }
1042 p+=i;
1043
1044 n2s(p,i);
1045 param_len+=i+2;
1046 if (param_len > n)
1047 {
1048 al=SSL_AD_DECODE_ERROR;
1049 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1050 goto f_err;
1051 }
1052 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1053 {
1054 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1055 goto err;
1056 }
1057 p+=i;
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_PUB_KEY_LENGTH);
1065 goto f_err;
1066 }
1067 if (!(dh->pub_key=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 n-=param_len;
1074
1075#ifndef NO_RSA
1076 if (alg & SSL_aRSA)
1077 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1078#else
1079 if (0)
1080 ;
1081#endif
1082#ifndef NO_DSA
1083 else if (alg & SSL_aDSS)
1084 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1085#endif
1086 /* else anonymous DH, so no certificate or pkey. */
1087
1088 s->session->sess_cert->peer_dh_tmp=dh;
1089 dh=NULL;
1090 }
1091 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1092 {
1093 al=SSL_AD_ILLEGAL_PARAMETER;
1094 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1095 goto f_err;
1096 }
1097#endif /* !NO_DH */
1098 if (alg & SSL_aFZA)
1099 {
1100 al=SSL_AD_HANDSHAKE_FAILURE;
1101 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1102 goto f_err;
1103 }
1104
1105
1106 /* p points to the next byte, there are 'n' bytes left */
1107
1108
1109 /* if it was signed, check the signature */
1110 if (pkey != NULL)
1111 {
1112 n2s(p,i);
1113 n-=2;
1114 j=EVP_PKEY_size(pkey);
1115
1116 if ((i != n) || (n > j) || (n <= 0))
1117 {
1118 /* wrong packet length */
1119 al=SSL_AD_DECODE_ERROR;
1120 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1121 goto f_err;
1122 }
1123
1124#ifndef NO_RSA
1125 if (pkey->type == EVP_PKEY_RSA)
1126 {
1127 int num;
1128
1129 j=0;
1130 q=md_buf;
1131 for (num=2; num > 0; num--)
1132 {
1133 EVP_DigestInit(&md_ctx,(num == 2)
1134 ?s->ctx->md5:s->ctx->sha1);
1135 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1136 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1137 EVP_DigestUpdate(&md_ctx,param,param_len);
1138 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1139 q+=i;
1140 j+=i;
1141 }
1142 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1143 pkey->pkey.rsa);
1144 if (i < 0)
1145 {
1146 al=SSL_AD_DECRYPT_ERROR;
1147 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1148 goto f_err;
1149 }
1150 if (i == 0)
1151 {
1152 /* bad signature */
1153 al=SSL_AD_DECRYPT_ERROR;
1154 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1155 goto f_err;
1156 }
1157 }
1158 else
1159#endif
1160#ifndef NO_DSA
1161 if (pkey->type == EVP_PKEY_DSA)
1162 {
1163 /* lets do DSS */
1164 EVP_VerifyInit(&md_ctx,EVP_dss1());
1165 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1166 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1167 EVP_VerifyUpdate(&md_ctx,param,param_len);
1168 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1169 {
1170 /* bad signature */
1171 al=SSL_AD_DECRYPT_ERROR;
1172 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1173 goto f_err;
1174 }
1175 }
1176 else
1177#endif
1178 {
1179 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1180 goto err;
1181 }
1182 }
1183 else
1184 {
1185 /* still data left over */
1186 if (!(alg & SSL_aNULL))
1187 {
1188 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1189 goto err;
1190 }
1191 if (n != 0)
1192 {
1193 al=SSL_AD_DECODE_ERROR;
1194 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1195 goto f_err;
1196 }
1197 }
1198 EVP_PKEY_free(pkey);
1199 return(1);
1200f_err:
1201 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1202err:
1203 EVP_PKEY_free(pkey);
1204#ifndef NO_RSA
1205 if (rsa != NULL)
1206 RSA_free(rsa);
1207#endif
1208#ifndef NO_DH
1209 if (dh != NULL)
1210 DH_free(dh);
1211#endif
1212 return(-1);
1213 }
1214
1215static int ssl3_get_certificate_request(SSL *s)
1216 {
1217 int ok,ret=0;
1218 unsigned long n,nc,l;
1219 unsigned int llen,ctype_num,i;
1220 X509_NAME *xn=NULL;
1221 unsigned char *p,*d,*q;
1222 STACK_OF(X509_NAME) *ca_sk=NULL;
1223
1224 n=ssl3_get_message(s,
1225 SSL3_ST_CR_CERT_REQ_A,
1226 SSL3_ST_CR_CERT_REQ_B,
1227 -1,
1228#if defined(MSDOS) && !defined(WIN32)
1229 1024*30, /* 30k max cert list :-) */
1230#else
1231 1024*100, /* 100k max cert list :-) */
1232#endif
1233 &ok);
1234
1235 if (!ok) return((int)n);
1236
1237 s->s3->tmp.cert_req=0;
1238
1239 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1240 {
1241 s->s3->tmp.reuse_message=1;
1242 return(1);
1243 }
1244
1245 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1246 {
1247 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1248 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1249 goto err;
1250 }
1251
1252 /* TLS does not like anon-DH with client cert */
1253 if (s->version > SSL3_VERSION)
1254 {
1255 l=s->s3->tmp.new_cipher->algorithms;
1256 if (l & SSL_aNULL)
1257 {
1258 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1259 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1260 goto err;
1261 }
1262 }
1263
1264 d=p=(unsigned char *)s->init_buf->data;
1265
1266 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1267 {
1268 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1269 goto err;
1270 }
1271
1272 /* get the certificate types */
1273 ctype_num= *(p++);
1274 if (ctype_num > SSL3_CT_NUMBER)
1275 ctype_num=SSL3_CT_NUMBER;
1276 for (i=0; i<ctype_num; i++)
1277 s->s3->tmp.ctype[i]= p[i];
1278 p+=ctype_num;
1279
1280 /* get the CA RDNs */
1281 n2s(p,llen);
1282#if 0
1283{
1284FILE *out;
1285out=fopen("/tmp/vsign.der","w");
1286fwrite(p,1,llen,out);
1287fclose(out);
1288}
1289#endif
1290
1291 if ((llen+ctype_num+2+1) != n)
1292 {
1293 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1294 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1295 goto err;
1296 }
1297
1298 for (nc=0; nc<llen; )
1299 {
1300 n2s(p,l);
1301 if ((l+nc+2) > llen)
1302 {
1303 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1304 goto cont; /* netscape bugs */
1305 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1306 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1307 goto err;
1308 }
1309
1310 q=p;
1311
1312 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1313 {
1314 /* If netscape tolerance is on, ignore errors */
1315 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1316 goto cont;
1317 else
1318 {
1319 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1320 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1321 goto err;
1322 }
1323 }
1324
1325 if (q != (p+l))
1326 {
1327 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1328 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1329 goto err;
1330 }
1331 if (!sk_X509_NAME_push(ca_sk,xn))
1332 {
1333 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1334 goto err;
1335 }
1336
1337 p+=l;
1338 nc+=l+2;
1339 }
1340
1341 if (0)
1342 {
1343cont:
1344 ERR_clear_error();
1345 }
1346
1347 /* we should setup a certificate to return.... */
1348 s->s3->tmp.cert_req=1;
1349 s->s3->tmp.ctype_num=ctype_num;
1350 if (s->s3->tmp.ca_names != NULL)
1351 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1352 s->s3->tmp.ca_names=ca_sk;
1353 ca_sk=NULL;
1354
1355 ret=1;
1356err:
1357 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1358 return(ret);
1359 }
1360
1361static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1362 {
1363 return(X509_NAME_cmp(*a,*b));
1364 }
1365
1366static int ssl3_get_server_done(SSL *s)
1367 {
1368 int ok,ret=0;
1369 long n;
1370
1371 n=ssl3_get_message(s,
1372 SSL3_ST_CR_SRVR_DONE_A,
1373 SSL3_ST_CR_SRVR_DONE_B,
1374 SSL3_MT_SERVER_DONE,
1375 30, /* should be very small, like 0 :-) */
1376 &ok);
1377
1378 if (!ok) return((int)n);
1379 if (n > 0)
1380 {
1381 /* should contain no data */
1382 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1383 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1384 return -1;
1385 }
1386 ret=1;
1387 return(ret);
1388 }
1389
1390static int ssl3_send_client_key_exchange(SSL *s)
1391 {
1392 unsigned char *p,*d;
1393 int n;
1394 unsigned long l;
1395#ifndef NO_RSA
1396 unsigned char *q;
1397 EVP_PKEY *pkey=NULL;
1398#endif
1399
1400 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1401 {
1402 d=(unsigned char *)s->init_buf->data;
1403 p= &(d[4]);
1404
1405 l=s->s3->tmp.new_cipher->algorithms;
1406
1407#ifndef NO_RSA
1408 if (l & SSL_kRSA)
1409 {
1410 RSA *rsa;
1411 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1412
1413 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1414 rsa=s->session->sess_cert->peer_rsa_tmp;
1415 else
1416 {
1417 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1418 if ((pkey == NULL) ||
1419 (pkey->type != EVP_PKEY_RSA) ||
1420 (pkey->pkey.rsa == NULL))
1421 {
1422 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1423 goto err;
1424 }
1425 rsa=pkey->pkey.rsa;
1426 EVP_PKEY_free(pkey);
1427 }
1428
1429 tmp_buf[0]=s->client_version>>8;
1430 tmp_buf[1]=s->client_version&0xff;
1431 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1432 goto err;
1433
1434 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1435
1436 q=p;
1437 /* Fix buf for TLS and beyond */
1438 if (s->version > SSL3_VERSION)
1439 p+=2;
1440 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1441 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1442#ifdef PKCS1_CHECK
1443 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1444 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1445#endif
1446 if (n <= 0)
1447 {
1448 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1449 goto err;
1450 }
1451
1452 /* Fix buf for TLS and beyond */
1453 if (s->version > SSL3_VERSION)
1454 {
1455 s2n(n,q);
1456 n+=2;
1457 }
1458
1459 s->session->master_key_length=
1460 s->method->ssl3_enc->generate_master_secret(s,
1461 s->session->master_key,
1462 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1463 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1464 }
1465 else
1466#endif
1467#ifndef NO_DH
1468 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1469 {
1470 DH *dh_srvr,*dh_clnt;
1471
1472 if (s->session->sess_cert->peer_dh_tmp != NULL)
1473 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1474 else
1475 {
1476 /* we get them from the cert */
1477 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1478 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1479 goto err;
1480 }
1481
1482 /* generate a new random key */
1483 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1484 {
1485 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1486 goto err;
1487 }
1488 if (!DH_generate_key(dh_clnt))
1489 {
1490 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1491 goto err;
1492 }
1493
1494 /* use the 'p' output buffer for the DH key, but
1495 * make sure to clear it out afterwards */
1496
1497 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1498
1499 if (n <= 0)
1500 {
1501 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1502 goto err;
1503 }
1504
1505 /* generate master key from the result */
1506 s->session->master_key_length=
1507 s->method->ssl3_enc->generate_master_secret(s,
1508 s->session->master_key,p,n);
1509 /* clean up */
1510 memset(p,0,n);
1511
1512 /* send off the data */
1513 n=BN_num_bytes(dh_clnt->pub_key);
1514 s2n(n,p);
1515 BN_bn2bin(dh_clnt->pub_key,p);
1516 n+=2;
1517
1518 DH_free(dh_clnt);
1519
1520 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1521 }
1522 else
1523#endif
1524 {
1525 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1526 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1527 goto err;
1528 }
1529
1530 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1531 l2n3(n,d);
1532
1533 s->state=SSL3_ST_CW_KEY_EXCH_B;
1534 /* number of bytes to write */
1535 s->init_num=n+4;
1536 s->init_off=0;
1537 }
1538
1539 /* SSL3_ST_CW_KEY_EXCH_B */
1540 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1541err:
1542 return(-1);
1543 }
1544
1545static int ssl3_send_client_verify(SSL *s)
1546 {
1547 unsigned char *p,*d;
1548 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1549 EVP_PKEY *pkey;
1550#ifndef NO_RSA
1551 unsigned u=0;
1552#endif
1553 unsigned long n;
1554#ifndef NO_DSA
1555 int j;
1556#endif
1557
1558 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1559 {
1560 d=(unsigned char *)s->init_buf->data;
1561 p= &(d[4]);
1562 pkey=s->cert->key->privatekey;
1563
1564 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1565 &(data[MD5_DIGEST_LENGTH]));
1566
1567#ifndef NO_RSA
1568 if (pkey->type == EVP_PKEY_RSA)
1569 {
1570 s->method->ssl3_enc->cert_verify_mac(s,
1571 &(s->s3->finish_dgst1),&(data[0]));
1572 if (RSA_sign(NID_md5_sha1, data,
1573 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1574 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1575 {
1576 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1577 goto err;
1578 }
1579 s2n(u,p);
1580 n=u+2;
1581 }
1582 else
1583#endif
1584#ifndef NO_DSA
1585 if (pkey->type == EVP_PKEY_DSA)
1586 {
1587 if (!DSA_sign(pkey->save_type,
1588 &(data[MD5_DIGEST_LENGTH]),
1589 SHA_DIGEST_LENGTH,&(p[2]),
1590 (unsigned int *)&j,pkey->pkey.dsa))
1591 {
1592 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1593 goto err;
1594 }
1595 s2n(j,p);
1596 n=j+2;
1597 }
1598 else
1599#endif
1600 {
1601 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1602 goto err;
1603 }
1604 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1605 l2n3(n,d);
1606
1607 s->init_num=(int)n+4;
1608 s->init_off=0;
1609 }
1610 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1611err:
1612 return(-1);
1613 }
1614
1615static int ssl3_send_client_certificate(SSL *s)
1616 {
1617 X509 *x509=NULL;
1618 EVP_PKEY *pkey=NULL;
1619 int i;
1620 unsigned long l;
1621
1622 if (s->state == SSL3_ST_CW_CERT_A)
1623 {
1624 if ((s->cert == NULL) ||
1625 (s->cert->key->x509 == NULL) ||
1626 (s->cert->key->privatekey == NULL))
1627 s->state=SSL3_ST_CW_CERT_B;
1628 else
1629 s->state=SSL3_ST_CW_CERT_C;
1630 }
1631
1632 /* We need to get a client cert */
1633 if (s->state == SSL3_ST_CW_CERT_B)
1634 {
1635 /* If we get an error, we need to
1636 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1637 * We then get retied later */
1638 i=0;
1639 if (s->ctx->client_cert_cb != NULL)
1640 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1641 if (i < 0)
1642 {
1643 s->rwstate=SSL_X509_LOOKUP;
1644 return(-1);
1645 }
1646 s->rwstate=SSL_NOTHING;
1647 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1648 {
1649 s->state=SSL3_ST_CW_CERT_B;
1650 if ( !SSL_use_certificate(s,x509) ||
1651 !SSL_use_PrivateKey(s,pkey))
1652 i=0;
1653 }
1654 else if (i == 1)
1655 {
1656 i=0;
1657 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1658 }
1659
1660 if (x509 != NULL) X509_free(x509);
1661 if (pkey != NULL) EVP_PKEY_free(pkey);
1662 if (i == 0)
1663 {
1664 if (s->version == SSL3_VERSION)
1665 {
1666 s->s3->tmp.cert_req=0;
1667 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1668 return(1);
1669 }
1670 else
1671 {
1672 s->s3->tmp.cert_req=2;
1673 }
1674 }
1675
1676 /* Ok, we have a cert */
1677 s->state=SSL3_ST_CW_CERT_C;
1678 }
1679
1680 if (s->state == SSL3_ST_CW_CERT_C)
1681 {
1682 s->state=SSL3_ST_CW_CERT_D;
1683 l=ssl3_output_cert_chain(s,
1684 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1685 s->init_num=(int)l;
1686 s->init_off=0;
1687 }
1688 /* SSL3_ST_CW_CERT_D */
1689 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1690 }
1691
1692#define has_bits(i,m) (((i)&(m)) == (m))
1693
1694static int ssl3_check_cert_and_algorithm(SSL *s)
1695 {
1696 int i,idx;
1697 long algs;
1698 EVP_PKEY *pkey=NULL;
1699 SESS_CERT *sc;
1700#ifndef NO_RSA
1701 RSA *rsa;
1702#endif
1703#ifndef NO_DH
1704 DH *dh;
1705#endif
1706
1707 sc=s->session->sess_cert;
1708
1709 if (sc == NULL)
1710 {
1711 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1712 goto err;
1713 }
1714
1715 algs=s->s3->tmp.new_cipher->algorithms;
1716
1717 /* we don't have a certificate */
1718 if (algs & (SSL_aDH|SSL_aNULL))
1719 return(1);
1720
1721#ifndef NO_RSA
1722 rsa=s->session->sess_cert->peer_rsa_tmp;
1723#endif
1724#ifndef NO_DH
1725 dh=s->session->sess_cert->peer_dh_tmp;
1726#endif
1727
1728 /* This is the passed certificate */
1729
1730 idx=sc->peer_cert_type;
1731 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1732 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1733 EVP_PKEY_free(pkey);
1734
1735
1736 /* Check that we have a certificate if we require one */
1737 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1738 {
1739 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1740 goto f_err;
1741 }
1742#ifndef NO_DSA
1743 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1744 {
1745 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1746 goto f_err;
1747 }
1748#endif
1749#ifndef NO_RSA
1750 if ((algs & SSL_kRSA) &&
1751 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1752 {
1753 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1754 goto f_err;
1755 }
1756#endif
1757#ifndef NO_DH
1758 if ((algs & SSL_kEDH) &&
1759 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1760 {
1761 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1762 goto f_err;
1763 }
1764 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1765 {
1766 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1767 goto f_err;
1768 }
1769#ifndef NO_DSA
1770 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1771 {
1772 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1773 goto f_err;
1774 }
1775#endif
1776#endif
1777
1778 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1779 {
1780#ifndef NO_RSA
1781 if (algs & SSL_kRSA)
1782 {
1783 if (rsa == NULL
1784 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1785 {
1786 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1787 goto f_err;
1788 }
1789 }
1790 else
1791#endif
1792#ifndef NO_DH
1793 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1794 {
1795 if (dh == NULL
1796 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1797 {
1798 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1799 goto f_err;
1800 }
1801 }
1802 else
1803#endif
1804 {
1805 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1806 goto f_err;
1807 }
1808 }
1809 return(1);
1810f_err:
1811 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1812err:
1813 return(0);
1814 }
1815
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