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Tomato 1.28
[tomato.git] / release / src / router / openssl / ssl / s3_clnt.c
blob89ad45a18552ed4c206b9a5e576bff873c0c356e
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
121 static SSL_METHOD *ssl3_get_client_method(int ver);
122 static int ssl3_client_hello(SSL *s);
123 static int ssl3_get_server_hello(SSL *s);
124 static int ssl3_get_certificate_request(SSL *s);
125 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
126 static int ssl3_get_server_done(SSL *s);
127 static int ssl3_send_client_verify(SSL *s);
128 static int ssl3_send_client_certificate(SSL *s);
129 static int ssl3_send_client_key_exchange(SSL *s);
130 static int ssl3_get_key_exchange(SSL *s);
131 static int ssl3_get_server_certificate(SSL *s);
132 static int ssl3_check_cert_and_algorithm(SSL *s);
133 static SSL_METHOD *ssl3_get_client_method(int ver)
134 {
135 if (ver == SSL3_VERSION)
136 return(SSLv3_client_method());
137 else
138 return(NULL);
139 }
140
141 SSL_METHOD *SSLv3_client_method(void)
142 {
143 static int init=1;
144 static SSL_METHOD SSLv3_client_data;
145
146 if (init)
147 {
148 init=0;
149 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
150 sizeof(SSL_METHOD));
151 SSLv3_client_data.ssl_connect=ssl3_connect;
152 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
153 }
154 return(&SSLv3_client_data);
155 }
156
157 int ssl3_connect(SSL *s)
158 {
159 BUF_MEM *buf;
160 unsigned long Time=time(NULL),l;
161 long num1;
162 void (*cb)()=NULL;
163 int ret= -1;
164 int new_state,state,skip=0;;
165
166 RAND_add(&Time,sizeof(Time),0);
167 ERR_clear_error();
168 clear_sys_error();
169
170 if (s->info_callback != NULL)
171 cb=s->info_callback;
172 else if (s->ctx->info_callback != NULL)
173 cb=s->ctx->info_callback;
174
175 s->in_handshake++;
176 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
177
178 for (;;)
179 {
180 state=s->state;
181
182 switch(s->state)
183 {
184 case SSL_ST_RENEGOTIATE:
185 s->new_session=1;
186 s->state=SSL_ST_CONNECT;
187 s->ctx->stats.sess_connect_renegotiate++;
188 /* break */
189 case SSL_ST_BEFORE:
190 case SSL_ST_CONNECT:
191 case SSL_ST_BEFORE|SSL_ST_CONNECT:
192 case SSL_ST_OK|SSL_ST_CONNECT:
193
194 s->server=0;
195 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
196
197 if ((s->version & 0xff00 ) != 0x0300)
198 {
199 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_INTERNAL_ERROR);
200 ret = -1;
201 goto end;
202 }
203
204 /* s->version=SSL3_VERSION; */
205 s->type=SSL_ST_CONNECT;
206
207 if (s->init_buf == NULL)
208 {
209 if ((buf=BUF_MEM_new()) == NULL)
210 {
211 ret= -1;
212 goto end;
213 }
214 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
215 {
216 ret= -1;
217 goto end;
218 }
219 s->init_buf=buf;
220 }
221
222 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
223
224 /* setup buffing BIO */
225 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
226
227 /* don't push the buffering BIO quite yet */
228
229 ssl3_init_finished_mac(s);
230
231 s->state=SSL3_ST_CW_CLNT_HELLO_A;
232 s->ctx->stats.sess_connect++;
233 s->init_num=0;
234 break;
235
236 case SSL3_ST_CW_CLNT_HELLO_A:
237 case SSL3_ST_CW_CLNT_HELLO_B:
238
239 s->shutdown=0;
240 ret=ssl3_client_hello(s);
241 if (ret <= 0) goto end;
242 s->state=SSL3_ST_CR_SRVR_HELLO_A;
243 s->init_num=0;
244
245 /* turn on buffering for the next lot of output */
246 if (s->bbio != s->wbio)
247 s->wbio=BIO_push(s->bbio,s->wbio);
248
249 break;
250
251 case SSL3_ST_CR_SRVR_HELLO_A:
252 case SSL3_ST_CR_SRVR_HELLO_B:
253 ret=ssl3_get_server_hello(s);
254 if (ret <= 0) goto end;
255 if (s->hit)
256 s->state=SSL3_ST_CR_FINISHED_A;
257 else
258 s->state=SSL3_ST_CR_CERT_A;
259 s->init_num=0;
260 break;
261
262 case SSL3_ST_CR_CERT_A:
263 case SSL3_ST_CR_CERT_B:
264 /* Check if it is anon DH */
265 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
266 {
267 ret=ssl3_get_server_certificate(s);
268 if (ret <= 0) goto end;
269 }
270 else
271 skip=1;
272 s->state=SSL3_ST_CR_KEY_EXCH_A;
273 s->init_num=0;
274 break;
275
276 case SSL3_ST_CR_KEY_EXCH_A:
277 case SSL3_ST_CR_KEY_EXCH_B:
278 ret=ssl3_get_key_exchange(s);
279 if (ret <= 0) goto end;
280 s->state=SSL3_ST_CR_CERT_REQ_A;
281 s->init_num=0;
282
283 /* at this point we check that we have the
284 * required stuff from the server */
285 if (!ssl3_check_cert_and_algorithm(s))
286 {
287 ret= -1;
288 goto end;
289 }
290 break;
291
292 case SSL3_ST_CR_CERT_REQ_A:
293 case SSL3_ST_CR_CERT_REQ_B:
294 ret=ssl3_get_certificate_request(s);
295 if (ret <= 0) goto end;
296 s->state=SSL3_ST_CR_SRVR_DONE_A;
297 s->init_num=0;
298 break;
299
300 case SSL3_ST_CR_SRVR_DONE_A:
301 case SSL3_ST_CR_SRVR_DONE_B:
302 ret=ssl3_get_server_done(s);
303 if (ret <= 0) goto end;
304 if (s->s3->tmp.cert_req)
305 s->state=SSL3_ST_CW_CERT_A;
306 else
307 s->state=SSL3_ST_CW_KEY_EXCH_A;
308 s->init_num=0;
309
310 break;
311
312 case SSL3_ST_CW_CERT_A:
313 case SSL3_ST_CW_CERT_B:
314 case SSL3_ST_CW_CERT_C:
315 case SSL3_ST_CW_CERT_D:
316 ret=ssl3_send_client_certificate(s);
317 if (ret <= 0) goto end;
318 s->state=SSL3_ST_CW_KEY_EXCH_A;
319 s->init_num=0;
320 break;
321
322 case SSL3_ST_CW_KEY_EXCH_A:
323 case SSL3_ST_CW_KEY_EXCH_B:
324 ret=ssl3_send_client_key_exchange(s);
325 if (ret <= 0) goto end;
326 l=s->s3->tmp.new_cipher->algorithms;
327 /* EAY EAY EAY need to check for DH fix cert
328 * sent back */
329 /* For TLS, cert_req is set to 2, so a cert chain
330 * of nothing is sent, but no verify packet is sent */
331 if (s->s3->tmp.cert_req == 1)
332 {
333 s->state=SSL3_ST_CW_CERT_VRFY_A;
334 }
335 else
336 {
337 s->state=SSL3_ST_CW_CHANGE_A;
338 s->s3->change_cipher_spec=0;
339 }
340
341 s->init_num=0;
342 break;
343
344 case SSL3_ST_CW_CERT_VRFY_A:
345 case SSL3_ST_CW_CERT_VRFY_B:
346 ret=ssl3_send_client_verify(s);
347 if (ret <= 0) goto end;
348 s->state=SSL3_ST_CW_CHANGE_A;
349 s->init_num=0;
350 s->s3->change_cipher_spec=0;
351 break;
352
353 case SSL3_ST_CW_CHANGE_A:
354 case SSL3_ST_CW_CHANGE_B:
355 ret=ssl3_send_change_cipher_spec(s,
356 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
357 if (ret <= 0) goto end;
358 s->state=SSL3_ST_CW_FINISHED_A;
359 s->init_num=0;
360
361 s->session->cipher=s->s3->tmp.new_cipher;
362 if (s->s3->tmp.new_compression == NULL)
363 s->session->compress_meth=0;
364 else
365 s->session->compress_meth=
366 s->s3->tmp.new_compression->id;
367 if (!s->method->ssl3_enc->setup_key_block(s))
368 {
369 ret= -1;
370 goto end;
371 }
372
373 if (!s->method->ssl3_enc->change_cipher_state(s,
374 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
375 {
376 ret= -1;
377 goto end;
378 }
379
380 break;
381
382 case SSL3_ST_CW_FINISHED_A:
383 case SSL3_ST_CW_FINISHED_B:
384 ret=ssl3_send_finished(s,
385 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
386 s->method->ssl3_enc->client_finished_label,
387 s->method->ssl3_enc->client_finished_label_len);
388 if (ret <= 0) goto end;
389 s->state=SSL3_ST_CW_FLUSH;
390
391 /* clear flags */
392 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
393 if (s->hit)
394 {
395 s->s3->tmp.next_state=SSL_ST_OK;
396 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
397 {
398 s->state=SSL_ST_OK;
399 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
400 s->s3->delay_buf_pop_ret=0;
401 }
402 }
403 else
404 {
405 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
406 }
407 s->init_num=0;
408 break;
409
410 case SSL3_ST_CR_FINISHED_A:
411 case SSL3_ST_CR_FINISHED_B:
412
413 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
414 SSL3_ST_CR_FINISHED_B);
415 if (ret <= 0) goto end;
416
417 if (s->hit)
418 s->state=SSL3_ST_CW_CHANGE_A;
419 else
420 s->state=SSL_ST_OK;
421 s->init_num=0;
422 break;
423
424 case SSL3_ST_CW_FLUSH:
425 /* number of bytes to be flushed */
426 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
427 if (num1 > 0)
428 {
429 s->rwstate=SSL_WRITING;
430 num1=BIO_flush(s->wbio);
431 if (num1 <= 0) { ret= -1; goto end; }
432 s->rwstate=SSL_NOTHING;
433 }
434
435 s->state=s->s3->tmp.next_state;
436 break;
437
438 case SSL_ST_OK:
439 /* clean a few things up */
440 ssl3_cleanup_key_block(s);
441
442 if (s->init_buf != NULL)
443 {
444 BUF_MEM_free(s->init_buf);
445 s->init_buf=NULL;
446 }
447
448 /* If we are not 'joining' the last two packets,
449 * remove the buffering now */
450 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
451 ssl_free_wbio_buffer(s);
452 /* else do it later in ssl3_write */
453
454 s->init_num=0;
455 s->new_session=0;
456
457 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
458 if (s->hit) s->ctx->stats.sess_hit++;
459
460 ret=1;
461 /* s->server=0; */
462 s->handshake_func=ssl3_connect;
463 s->ctx->stats.sess_connect_good++;
464
465 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
466
467 goto end;
468 /* break; */
469
470 default:
471 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
472 ret= -1;
473 goto end;
474 /* break; */
475 }
476
477 /* did we do anything */
478 if (!s->s3->tmp.reuse_message && !skip)
479 {
480 if (s->debug)
481 {
482 if ((ret=BIO_flush(s->wbio)) <= 0)
483 goto end;
484 }
485
486 if ((cb != NULL) && (s->state != state))
487 {
488 new_state=s->state;
489 s->state=state;
490 cb(s,SSL_CB_CONNECT_LOOP,1);
491 s->state=new_state;
492 }
493 }
494 skip=0;
495 }
496 end:
497 s->in_handshake--;
498 if (cb != NULL)
499 cb(s,SSL_CB_CONNECT_EXIT,ret);
500 return(ret);
501 }
502
503
504 static int ssl3_client_hello(SSL *s)
505 {
506 unsigned char *buf;
507 unsigned char *p,*d;
508 int i,j;
509 unsigned long Time,l;
510 SSL_COMP *comp;
511
512 buf=(unsigned char *)s->init_buf->data;
513 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
514 {
515 if ((s->session == NULL) ||
516 (s->session->ssl_version != s->version) ||
517 (s->session->not_resumable))
518 {
519 if (!ssl_get_new_session(s,0))
520 goto err;
521 }
522 /* else use the pre-loaded session */
523
524 p=s->s3->client_random;
525 Time=time(NULL); /* Time */
526 l2n(Time,p);
527 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
528
529 /* Do the message type and length last */
530 d=p= &(buf[4]);
531
532 *(p++)=s->version>>8;
533 *(p++)=s->version&0xff;
534 s->client_version=s->version;
535
536 /* Random stuff */
537 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
538 p+=SSL3_RANDOM_SIZE;
539
540 /* Session ID */
541 if (s->new_session)
542 i=0;
543 else
544 i=s->session->session_id_length;
545 *(p++)=i;
546 if (i != 0)
547 {
548 memcpy(p,s->session->session_id,i);
549 p+=i;
550 }
551
552 /* Ciphers supported */
553 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
554 if (i == 0)
555 {
556 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
557 goto err;
558 }
559 s2n(i,p);
560 p+=i;
561
562 /* COMPRESSION */
563 if (s->ctx->comp_methods == NULL)
564 j=0;
565 else
566 j=sk_SSL_COMP_num(s->ctx->comp_methods);
567 *(p++)=1+j;
568 for (i=0; i<j; i++)
569 {
570 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
571 *(p++)=comp->id;
572 }
573 *(p++)=0; /* Add the NULL method */
574
575 l=(p-d);
576 d=buf;
577 *(d++)=SSL3_MT_CLIENT_HELLO;
578 l2n3(l,d);
579
580 s->state=SSL3_ST_CW_CLNT_HELLO_B;
581 /* number of bytes to write */
582 s->init_num=p-buf;
583 s->init_off=0;
584 }
585
586 /* SSL3_ST_CW_CLNT_HELLO_B */
587 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
588 err:
589 return(-1);
590 }
591
592 static int ssl3_get_server_hello(SSL *s)
593 {
594 STACK_OF(SSL_CIPHER) *sk;
595 SSL_CIPHER *c;
596 unsigned char *p,*d;
597 int i,al,ok;
598 unsigned int j;
599 long n;
600 SSL_COMP *comp;
601
602 n=ssl3_get_message(s,
603 SSL3_ST_CR_SRVR_HELLO_A,
604 SSL3_ST_CR_SRVR_HELLO_B,
605 SSL3_MT_SERVER_HELLO,
606 300, /* ?? */
607 &ok);
608
609 if (!ok) return((int)n);
610 d=p=(unsigned char *)s->init_buf->data;
611
612 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
613 {
614 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
615 s->version=(s->version&0xff00)|p[1];
616 al=SSL_AD_PROTOCOL_VERSION;
617 goto f_err;
618 }
619 p+=2;
620
621 /* load the server hello data */
622 /* load the server random */
623 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
624 p+=SSL3_RANDOM_SIZE;
625
626 /* get the session-id */
627 j= *(p++);
628
629 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
630 {
631 /* SSLref returns 16 :-( */
632 if (j < SSL2_SSL_SESSION_ID_LENGTH)
633 {
634 al=SSL_AD_ILLEGAL_PARAMETER;
635 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
636 goto f_err;
637 }
638 }
639 if (j != 0 && j == s->session->session_id_length
640 && memcmp(p,s->session->session_id,j) == 0)
641 {
642 if(s->sid_ctx_length != s->session->sid_ctx_length
643 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
644 {
645 al=SSL_AD_ILLEGAL_PARAMETER;
646 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
647 goto f_err;
648 }
649 s->hit=1;
650 }
651 else /* a miss or crap from the other end */
652 {
653 /* If we were trying for session-id reuse, make a new
654 * SSL_SESSION so we don't stuff up other people */
655 s->hit=0;
656 if (s->session->session_id_length > 0)
657 {
658 if (!ssl_get_new_session(s,0))
659 {
660 al=SSL_AD_INTERNAL_ERROR;
661 goto f_err;
662 }
663 }
664 s->session->session_id_length=j;
665 memcpy(s->session->session_id,p,j); /* j could be 0 */
666 }
667 p+=j;
668 c=ssl_get_cipher_by_char(s,p);
669 if (c == NULL)
670 {
671 /* unknown cipher */
672 al=SSL_AD_ILLEGAL_PARAMETER;
673 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
674 goto f_err;
675 }
676 p+=ssl_put_cipher_by_char(s,NULL,NULL);
677
678 sk=ssl_get_ciphers_by_id(s);
679 i=sk_SSL_CIPHER_find(sk,c);
680 if (i < 0)
681 {
682 /* we did not say we would use this cipher */
683 al=SSL_AD_ILLEGAL_PARAMETER;
684 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
685 goto f_err;
686 }
687
688 if (s->hit && (s->session->cipher != c))
689 {
690 if (!(s->options &
691 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
692 {
693 al=SSL_AD_ILLEGAL_PARAMETER;
694 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
695 goto f_err;
696 }
697 }
698 s->s3->tmp.new_cipher=c;
699
700 /* lets get the compression algorithm */
701 /* COMPRESSION */
702 j= *(p++);
703 if (j == 0)
704 comp=NULL;
705 else
706 comp=ssl3_comp_find(s->ctx->comp_methods,j);
707
708 if ((j != 0) && (comp == NULL))
709 {
710 al=SSL_AD_ILLEGAL_PARAMETER;
711 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
712 goto f_err;
713 }
714 else
715 {
716 s->s3->tmp.new_compression=comp;
717 }
718
719 if (p != (d+n))
720 {
721 /* wrong packet length */
722 al=SSL_AD_DECODE_ERROR;
723 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
724 goto err;
725 }
726
727 return(1);
728 f_err:
729 ssl3_send_alert(s,SSL3_AL_FATAL,al);
730 err:
731 return(-1);
732 }
733
734 static int ssl3_get_server_certificate(SSL *s)
735 {
736 int al,i,ok,ret= -1;
737 unsigned long n,nc,llen,l;
738 X509 *x=NULL;
739 unsigned char *p,*d,*q;
740 STACK_OF(X509) *sk=NULL;
741 SESS_CERT *sc;
742 EVP_PKEY *pkey=NULL;
743
744 n=ssl3_get_message(s,
745 SSL3_ST_CR_CERT_A,
746 SSL3_ST_CR_CERT_B,
747 -1,
748 #if defined(MSDOS) && !defined(WIN32)
749 1024*30, /* 30k max cert list :-) */
750 #else
751 1024*100, /* 100k max cert list :-) */
752 #endif
753 &ok);
754
755 if (!ok) return((int)n);
756
757 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
758 {
759 s->s3->tmp.reuse_message=1;
760 return(1);
761 }
762
763 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
764 {
765 al=SSL_AD_UNEXPECTED_MESSAGE;
766 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
767 goto f_err;
768 }
769 d=p=(unsigned char *)s->init_buf->data;
770
771 if ((sk=sk_X509_new_null()) == NULL)
772 {
773 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
774 goto err;
775 }
776
777 n2l3(p,llen);
778 if (llen+3 != n)
779 {
780 al=SSL_AD_DECODE_ERROR;
781 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
782 goto f_err;
783 }
784 for (nc=0; nc<llen; )
785 {
786 n2l3(p,l);
787 if ((l+nc+3) > llen)
788 {
789 al=SSL_AD_DECODE_ERROR;
790 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
791 goto f_err;
792 }
793
794 q=p;
795 x=d2i_X509(NULL,&q,l);
796 if (x == NULL)
797 {
798 al=SSL_AD_BAD_CERTIFICATE;
799 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
800 goto f_err;
801 }
802 if (q != (p+l))
803 {
804 al=SSL_AD_DECODE_ERROR;
805 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
806 goto f_err;
807 }
808 if (!sk_X509_push(sk,x))
809 {
810 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
811 goto err;
812 }
813 x=NULL;
814 nc+=l+3;
815 p=q;
816 }
817
818 i=ssl_verify_cert_chain(s,sk);
819 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
820 {
821 al=ssl_verify_alarm_type(s->verify_result);
822 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
823 goto f_err;
824 }
825 ERR_clear_error(); /* but we keep s->verify_result */
826
827 sc=ssl_sess_cert_new();
828 if (sc == NULL) goto err;
829
830 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
831 s->session->sess_cert=sc;
832
833 sc->cert_chain=sk;
834 /* Inconsistency alert: cert_chain does include the peer's
835 * certificate, which we don't include in s3_srvr.c */
836 x=sk_X509_value(sk,0);
837 sk=NULL;
838
839 pkey=X509_get_pubkey(x);
840
841 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
842 {
843 x=NULL;
844 al=SSL3_AL_FATAL;
845 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
846 goto f_err;
847 }
848
849 i=ssl_cert_type(x,pkey);
850 if (i < 0)
851 {
852 x=NULL;
853 al=SSL3_AL_FATAL;
854 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
855 goto f_err;
856 }
857
858 sc->peer_cert_type=i;
859 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
860 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
861 * We just created sc a couple of
862 * lines ago. */
863 X509_free(sc->peer_pkeys[i].x509);
864 sc->peer_pkeys[i].x509=x;
865 sc->peer_key= &(sc->peer_pkeys[i]);
866
867 if (s->session->peer != NULL)
868 X509_free(s->session->peer);
869 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
870 s->session->peer=x;
871 s->session->verify_result = s->verify_result;
872
873 x=NULL;
874 ret=1;
875
876 if (0)
877 {
878 f_err:
879 ssl3_send_alert(s,SSL3_AL_FATAL,al);
880 }
881 err:
882 EVP_PKEY_free(pkey);
883 X509_free(x);
884 sk_X509_pop_free(sk,X509_free);
885 return(ret);
886 }
887
888 static int ssl3_get_key_exchange(SSL *s)
889 {
890 #ifndef NO_RSA
891 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
892 #endif
893 EVP_MD_CTX md_ctx;
894 unsigned char *param,*p;
895 int al,i,j,param_len,ok;
896 long n,alg;
897 EVP_PKEY *pkey=NULL;
898 #ifndef NO_RSA
899 RSA *rsa=NULL;
900 #endif
901 #ifndef NO_DH
902 DH *dh=NULL;
903 #endif
904
905 /* use same message size as in ssl3_get_certificate_request()
906 * as ServerKeyExchange message may be skipped */
907 n=ssl3_get_message(s,
908 SSL3_ST_CR_KEY_EXCH_A,
909 SSL3_ST_CR_KEY_EXCH_B,
910 -1,
911 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
912 1024*30, /* 30k max cert list :-) */
913 #else
914 1024*100, /* 100k max cert list :-) */
915 #endif
916 &ok);
917
918 if (!ok) return((int)n);
919
920 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
921 {
922 s->s3->tmp.reuse_message=1;
923 return(1);
924 }
925
926 param=p=(unsigned char *)s->init_buf->data;
927
928 if (s->session->sess_cert != NULL)
929 {
930 #ifndef NO_RSA
931 if (s->session->sess_cert->peer_rsa_tmp != NULL)
932 {
933 RSA_free(s->session->sess_cert->peer_rsa_tmp);
934 s->session->sess_cert->peer_rsa_tmp=NULL;
935 }
936 #endif
937 #ifndef NO_DH
938 if (s->session->sess_cert->peer_dh_tmp)
939 {
940 DH_free(s->session->sess_cert->peer_dh_tmp);
941 s->session->sess_cert->peer_dh_tmp=NULL;
942 }
943 #endif
944 }
945 else
946 {
947 s->session->sess_cert=ssl_sess_cert_new();
948 }
949
950 param_len=0;
951 alg=s->s3->tmp.new_cipher->algorithms;
952
953 #ifndef NO_RSA
954 if (alg & SSL_kRSA)
955 {
956 if ((rsa=RSA_new()) == NULL)
957 {
958 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
959 goto err;
960 }
961 n2s(p,i);
962 param_len=i+2;
963 if (param_len > n)
964 {
965 al=SSL_AD_DECODE_ERROR;
966 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
967 goto f_err;
968 }
969 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
970 {
971 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
972 goto err;
973 }
974 p+=i;
975
976 n2s(p,i);
977 param_len+=i+2;
978 if (param_len > n)
979 {
980 al=SSL_AD_DECODE_ERROR;
981 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
982 goto f_err;
983 }
984 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
985 {
986 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
987 goto err;
988 }
989 p+=i;
990 n-=param_len;
991
992 /* this should be because we are using an export cipher */
993 if (alg & SSL_aRSA)
994 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
995 else
996 {
997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
998 goto err;
999 }
1000 s->session->sess_cert->peer_rsa_tmp=rsa;
1001 rsa=NULL;
1002 }
1003 #else /* NO_RSA */
1004 if (0)
1005 ;
1006 #endif
1007 #ifndef NO_DH
1008 else if (alg & SSL_kEDH)
1009 {
1010 if ((dh=DH_new()) == NULL)
1011 {
1012 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1013 goto err;
1014 }
1015 n2s(p,i);
1016 param_len=i+2;
1017 if (param_len > n)
1018 {
1019 al=SSL_AD_DECODE_ERROR;
1020 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1021 goto f_err;
1022 }
1023 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1024 {
1025 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1026 goto err;
1027 }
1028 p+=i;
1029
1030 n2s(p,i);
1031 param_len+=i+2;
1032 if (param_len > n)
1033 {
1034 al=SSL_AD_DECODE_ERROR;
1035 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1036 goto f_err;
1037 }
1038 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1039 {
1040 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1041 goto err;
1042 }
1043 p+=i;
1044
1045 n2s(p,i);
1046 param_len+=i+2;
1047 if (param_len > n)
1048 {
1049 al=SSL_AD_DECODE_ERROR;
1050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1051 goto f_err;
1052 }
1053 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1054 {
1055 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1056 goto err;
1057 }
1058 p+=i;
1059 n-=param_len;
1060
1061 #ifndef NO_RSA
1062 if (alg & SSL_aRSA)
1063 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1064 #else
1065 if (0)
1066 ;
1067 #endif
1068 #ifndef NO_DSA
1069 else if (alg & SSL_aDSS)
1070 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1071 #endif
1072 /* else anonymous DH, so no certificate or pkey. */
1073
1074 s->session->sess_cert->peer_dh_tmp=dh;
1075 dh=NULL;
1076 }
1077 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1078 {
1079 al=SSL_AD_ILLEGAL_PARAMETER;
1080 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1081 goto f_err;
1082 }
1083 #endif /* !NO_DH */
1084 if (alg & SSL_aFZA)
1085 {
1086 al=SSL_AD_HANDSHAKE_FAILURE;
1087 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1088 goto f_err;
1089 }
1090
1091
1092 /* p points to the next byte, there are 'n' bytes left */
1093
1094
1095 /* if it was signed, check the signature */
1096 if (pkey != NULL)
1097 {
1098 n2s(p,i);
1099 n-=2;
1100 j=EVP_PKEY_size(pkey);
1101
1102 if ((i != n) || (n > j) || (n <= 0))
1103 {
1104 /* wrong packet length */
1105 al=SSL_AD_DECODE_ERROR;
1106 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1107 goto f_err;
1108 }
1109
1110 #ifndef NO_RSA
1111 if (pkey->type == EVP_PKEY_RSA)
1112 {
1113 int num;
1114
1115 j=0;
1116 q=md_buf;
1117 for (num=2; num > 0; num--)
1118 {
1119 EVP_DigestInit(&md_ctx,(num == 2)
1120 ?s->ctx->md5:s->ctx->sha1);
1121 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1122 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1123 EVP_DigestUpdate(&md_ctx,param,param_len);
1124 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1125 q+=i;
1126 j+=i;
1127 }
1128 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1129 pkey->pkey.rsa);
1130 if (i < 0)
1131 {
1132 al=SSL_AD_DECRYPT_ERROR;
1133 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1134 goto f_err;
1135 }
1136 if (i == 0)
1137 {
1138 /* bad signature */
1139 al=SSL_AD_DECRYPT_ERROR;
1140 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1141 goto f_err;
1142 }
1143 }
1144 else
1145 #endif
1146 #ifndef NO_DSA
1147 if (pkey->type == EVP_PKEY_DSA)
1148 {
1149 /* lets do DSS */
1150 EVP_VerifyInit(&md_ctx,EVP_dss1());
1151 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1152 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1153 EVP_VerifyUpdate(&md_ctx,param,param_len);
1154 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1155 {
1156 /* bad signature */
1157 al=SSL_AD_DECRYPT_ERROR;
1158 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1159 goto f_err;
1160 }
1161 }
1162 else
1163 #endif
1164 {
1165 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1166 goto err;
1167 }
1168 }
1169 else
1170 {
1171 /* still data left over */
1172 if (!(alg & SSL_aNULL))
1173 {
1174 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1175 goto err;
1176 }
1177 if (n != 0)
1178 {
1179 al=SSL_AD_DECODE_ERROR;
1180 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1181 goto f_err;
1182 }
1183 }
1184 EVP_PKEY_free(pkey);
1185 return(1);
1186 f_err:
1187 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1188 err:
1189 EVP_PKEY_free(pkey);
1190 #ifndef NO_RSA
1191 if (rsa != NULL)
1192 RSA_free(rsa);
1193 #endif
1194 #ifndef NO_DH
1195 if (dh != NULL)
1196 DH_free(dh);
1197 #endif
1198 return(-1);
1199 }
1200
1201 static int ssl3_get_certificate_request(SSL *s)
1202 {
1203 int ok,ret=0;
1204 unsigned long n,nc,l;
1205 unsigned int llen,ctype_num,i;
1206 X509_NAME *xn=NULL;
1207 unsigned char *p,*d,*q;
1208 STACK_OF(X509_NAME) *ca_sk=NULL;
1209
1210 n=ssl3_get_message(s,
1211 SSL3_ST_CR_CERT_REQ_A,
1212 SSL3_ST_CR_CERT_REQ_B,
1213 -1,
1214 #if defined(MSDOS) && !defined(WIN32)
1215 1024*30, /* 30k max cert list :-) */
1216 #else
1217 1024*100, /* 100k max cert list :-) */
1218 #endif
1219 &ok);
1220
1221 if (!ok) return((int)n);
1222
1223 s->s3->tmp.cert_req=0;
1224
1225 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1226 {
1227 s->s3->tmp.reuse_message=1;
1228 return(1);
1229 }
1230
1231 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1232 {
1233 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1234 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1235 goto err;
1236 }
1237
1238 /* TLS does not like anon-DH with client cert */
1239 if (s->version > SSL3_VERSION)
1240 {
1241 l=s->s3->tmp.new_cipher->algorithms;
1242 if (l & SSL_aNULL)
1243 {
1244 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1245 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1246 goto err;
1247 }
1248 }
1249
1250 d=p=(unsigned char *)s->init_buf->data;
1251
1252 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1253 {
1254 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1255 goto err;
1256 }
1257
1258 /* get the certificate types */
1259 ctype_num= *(p++);
1260 if (ctype_num > SSL3_CT_NUMBER)
1261 ctype_num=SSL3_CT_NUMBER;
1262 for (i=0; i<ctype_num; i++)
1263 s->s3->tmp.ctype[i]= p[i];
1264 p+=ctype_num;
1265
1266 /* get the CA RDNs */
1267 n2s(p,llen);
1268 #if 0
1269 {
1270 FILE *out;
1271 out=fopen("/tmp/vsign.der","w");
1272 fwrite(p,1,llen,out);
1273 fclose(out);
1274 }
1275 #endif
1276
1277 if ((llen+ctype_num+2+1) != n)
1278 {
1279 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1280 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1281 goto err;
1282 }
1283
1284 for (nc=0; nc<llen; )
1285 {
1286 n2s(p,l);
1287 if ((l+nc+2) > llen)
1288 {
1289 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1290 goto cont; /* netscape bugs */
1291 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1292 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1293 goto err;
1294 }
1295
1296 q=p;
1297
1298 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1299 {
1300 /* If netscape tolerance is on, ignore errors */
1301 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1302 goto cont;
1303 else
1304 {
1305 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1306 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1307 goto err;
1308 }
1309 }
1310
1311 if (q != (p+l))
1312 {
1313 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1314 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1315 goto err;
1316 }
1317 if (!sk_X509_NAME_push(ca_sk,xn))
1318 {
1319 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1320 goto err;
1321 }
1322
1323 p+=l;
1324 nc+=l+2;
1325 }
1326
1327 if (0)
1328 {
1329 cont:
1330 ERR_clear_error();
1331 }
1332
1333 /* we should setup a certificate to return.... */
1334 s->s3->tmp.cert_req=1;
1335 s->s3->tmp.ctype_num=ctype_num;
1336 if (s->s3->tmp.ca_names != NULL)
1337 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1338 s->s3->tmp.ca_names=ca_sk;
1339 ca_sk=NULL;
1340
1341 ret=1;
1342 err:
1343 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1344 return(ret);
1345 }
1346
1347 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1348 {
1349 return(X509_NAME_cmp(*a,*b));
1350 }
1351
1352 static int ssl3_get_server_done(SSL *s)
1353 {
1354 int ok,ret=0;
1355 long n;
1356
1357 n=ssl3_get_message(s,
1358 SSL3_ST_CR_SRVR_DONE_A,
1359 SSL3_ST_CR_SRVR_DONE_B,
1360 SSL3_MT_SERVER_DONE,
1361 30, /* should be very small, like 0 :-) */
1362 &ok);
1363
1364 if (!ok) return((int)n);
1365 if (n > 0)
1366 {
1367 /* should contain no data */
1368 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1369 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1370 return -1;
1371 }
1372 ret=1;
1373 return(ret);
1374 }
1375
1376 static int ssl3_send_client_key_exchange(SSL *s)
1377 {
1378 unsigned char *p,*d;
1379 int n;
1380 unsigned long l;
1381 #ifndef NO_RSA
1382 unsigned char *q;
1383 EVP_PKEY *pkey=NULL;
1384 #endif
1385
1386 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1387 {
1388 d=(unsigned char *)s->init_buf->data;
1389 p= &(d[4]);
1390
1391 l=s->s3->tmp.new_cipher->algorithms;
1392
1393 #ifndef NO_RSA
1394 if (l & SSL_kRSA)
1395 {
1396 RSA *rsa;
1397 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1398
1399 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1400 rsa=s->session->sess_cert->peer_rsa_tmp;
1401 else
1402 {
1403 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1404 if ((pkey == NULL) ||
1405 (pkey->type != EVP_PKEY_RSA) ||
1406 (pkey->pkey.rsa == NULL))
1407 {
1408 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1409 goto err;
1410 }
1411 rsa=pkey->pkey.rsa;
1412 EVP_PKEY_free(pkey);
1413 }
1414
1415 tmp_buf[0]=s->client_version>>8;
1416 tmp_buf[1]=s->client_version&0xff;
1417 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1418 goto err;
1419
1420 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1421
1422 q=p;
1423 /* Fix buf for TLS and beyond */
1424 if (s->version > SSL3_VERSION)
1425 p+=2;
1426 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1427 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1428 #ifdef PKCS1_CHECK
1429 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1430 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1431 #endif
1432 if (n <= 0)
1433 {
1434 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1435 goto err;
1436 }
1437
1438 /* Fix buf for TLS and beyond */
1439 if (s->version > SSL3_VERSION)
1440 {
1441 s2n(n,q);
1442 n+=2;
1443 }
1444
1445 s->session->master_key_length=
1446 s->method->ssl3_enc->generate_master_secret(s,
1447 s->session->master_key,
1448 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1449 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1450 }
1451 else
1452 #endif
1453 #ifndef NO_DH
1454 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1455 {
1456 DH *dh_srvr,*dh_clnt;
1457
1458 if (s->session->sess_cert->peer_dh_tmp != NULL)
1459 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1460 else
1461 {
1462 /* we get them from the cert */
1463 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1464 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1465 goto err;
1466 }
1467
1468 /* generate a new random key */
1469 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1470 {
1471 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1472 goto err;
1473 }
1474 if (!DH_generate_key(dh_clnt))
1475 {
1476 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1477 goto err;
1478 }
1479
1480 /* use the 'p' output buffer for the DH key, but
1481 * make sure to clear it out afterwards */
1482
1483 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1484
1485 if (n <= 0)
1486 {
1487 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1488 goto err;
1489 }
1490
1491 /* generate master key from the result */
1492 s->session->master_key_length=
1493 s->method->ssl3_enc->generate_master_secret(s,
1494 s->session->master_key,p,n);
1495 /* clean up */
1496 memset(p,0,n);
1497
1498 /* send off the data */
1499 n=BN_num_bytes(dh_clnt->pub_key);
1500 s2n(n,p);
1501 BN_bn2bin(dh_clnt->pub_key,p);
1502 n+=2;
1503
1504 DH_free(dh_clnt);
1505
1506 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1507 }
1508 else
1509 #endif
1510 {
1511 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1512 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1513 goto err;
1514 }
1515
1516 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1517 l2n3(n,d);
1518
1519 s->state=SSL3_ST_CW_KEY_EXCH_B;
1520 /* number of bytes to write */
1521 s->init_num=n+4;
1522 s->init_off=0;
1523 }
1524
1525 /* SSL3_ST_CW_KEY_EXCH_B */
1526 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1527 err:
1528 return(-1);
1529 }
1530
1531 static int ssl3_send_client_verify(SSL *s)
1532 {
1533 unsigned char *p,*d;
1534 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1535 EVP_PKEY *pkey;
1536 #ifndef NO_RSA
1537 unsigned u=0;
1538 #endif
1539 unsigned long n;
1540 #ifndef NO_DSA
1541 int j;
1542 #endif
1543
1544 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1545 {
1546 d=(unsigned char *)s->init_buf->data;
1547 p= &(d[4]);
1548 pkey=s->cert->key->privatekey;
1549
1550 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1551 &(data[MD5_DIGEST_LENGTH]));
1552
1553 #ifndef NO_RSA
1554 if (pkey->type == EVP_PKEY_RSA)
1555 {
1556 s->method->ssl3_enc->cert_verify_mac(s,
1557 &(s->s3->finish_dgst1),&(data[0]));
1558 if (RSA_sign(NID_md5_sha1, data,
1559 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1560 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1561 {
1562 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1563 goto err;
1564 }
1565 s2n(u,p);
1566 n=u+2;
1567 }
1568 else
1569 #endif
1570 #ifndef NO_DSA
1571 if (pkey->type == EVP_PKEY_DSA)
1572 {
1573 if (!DSA_sign(pkey->save_type,
1574 &(data[MD5_DIGEST_LENGTH]),
1575 SHA_DIGEST_LENGTH,&(p[2]),
1576 (unsigned int *)&j,pkey->pkey.dsa))
1577 {
1578 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1579 goto err;
1580 }
1581 s2n(j,p);
1582 n=j+2;
1583 }
1584 else
1585 #endif
1586 {
1587 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1588 goto err;
1589 }
1590 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1591 l2n3(n,d);
1592
1593 s->init_num=(int)n+4;
1594 s->init_off=0;
1595 }
1596 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1597 err:
1598 return(-1);
1599 }
1600
1601 static int ssl3_send_client_certificate(SSL *s)
1602 {
1603 X509 *x509=NULL;
1604 EVP_PKEY *pkey=NULL;
1605 int i;
1606 unsigned long l;
1607
1608 if (s->state == SSL3_ST_CW_CERT_A)
1609 {
1610 if ((s->cert == NULL) ||
1611 (s->cert->key->x509 == NULL) ||
1612 (s->cert->key->privatekey == NULL))
1613 s->state=SSL3_ST_CW_CERT_B;
1614 else
1615 s->state=SSL3_ST_CW_CERT_C;
1616 }
1617
1618 /* We need to get a client cert */
1619 if (s->state == SSL3_ST_CW_CERT_B)
1620 {
1621 /* If we get an error, we need to
1622 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1623 * We then get retied later */
1624 i=0;
1625 if (s->ctx->client_cert_cb != NULL)
1626 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1627 if (i < 0)
1628 {
1629 s->rwstate=SSL_X509_LOOKUP;
1630 return(-1);
1631 }
1632 s->rwstate=SSL_NOTHING;
1633 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1634 {
1635 s->state=SSL3_ST_CW_CERT_B;
1636 if ( !SSL_use_certificate(s,x509) ||
1637 !SSL_use_PrivateKey(s,pkey))
1638 i=0;
1639 }
1640 else if (i == 1)
1641 {
1642 i=0;
1643 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1644 }
1645
1646 if (x509 != NULL) X509_free(x509);
1647 if (pkey != NULL) EVP_PKEY_free(pkey);
1648 if (i == 0)
1649 {
1650 if (s->version == SSL3_VERSION)
1651 {
1652 s->s3->tmp.cert_req=0;
1653 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1654 return(1);
1655 }
1656 else
1657 {
1658 s->s3->tmp.cert_req=2;
1659 }
1660 }
1661
1662 /* Ok, we have a cert */
1663 s->state=SSL3_ST_CW_CERT_C;
1664 }
1665
1666 if (s->state == SSL3_ST_CW_CERT_C)
1667 {
1668 s->state=SSL3_ST_CW_CERT_D;
1669 l=ssl3_output_cert_chain(s,
1670 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1671 s->init_num=(int)l;
1672 s->init_off=0;
1673 }
1674 /* SSL3_ST_CW_CERT_D */
1675 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1676 }
1677
1678 #define has_bits(i,m) (((i)&(m)) == (m))
1679
1680 static int ssl3_check_cert_and_algorithm(SSL *s)
1681 {
1682 int i,idx;
1683 long algs;
1684 EVP_PKEY *pkey=NULL;
1685 SESS_CERT *sc;
1686 #ifndef NO_RSA
1687 RSA *rsa;
1688 #endif
1689 #ifndef NO_DH
1690 DH *dh;
1691 #endif
1692
1693 sc=s->session->sess_cert;
1694
1695 if (sc == NULL)
1696 {
1697 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1698 goto err;
1699 }
1700
1701 algs=s->s3->tmp.new_cipher->algorithms;
1702
1703 /* we don't have a certificate */
1704 if (algs & (SSL_aDH|SSL_aNULL))
1705 return(1);
1706
1707 #ifndef NO_RSA
1708 rsa=s->session->sess_cert->peer_rsa_tmp;
1709 #endif
1710 #ifndef NO_DH
1711 dh=s->session->sess_cert->peer_dh_tmp;
1712 #endif
1713
1714 /* This is the passed certificate */
1715
1716 idx=sc->peer_cert_type;
1717 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1718 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1719 EVP_PKEY_free(pkey);
1720
1721
1722 /* Check that we have a certificate if we require one */
1723 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1724 {
1725 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1726 goto f_err;
1727 }
1728 #ifndef NO_DSA
1729 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1730 {
1731 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1732 goto f_err;
1733 }
1734 #endif
1735 #ifndef NO_RSA
1736 if ((algs & SSL_kRSA) &&
1737 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1738 {
1739 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1740 goto f_err;
1741 }
1742 #endif
1743 #ifndef NO_DH
1744 if ((algs & SSL_kEDH) &&
1745 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1746 {
1747 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1748 goto f_err;
1749 }
1750 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1751 {
1752 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1753 goto f_err;
1754 }
1755 #ifndef NO_DSA
1756 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1757 {
1758 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1759 goto f_err;
1760 }
1761 #endif
1762 #endif
1763
1764 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1765 {
1766 #ifndef NO_RSA
1767 if (algs & SSL_kRSA)
1768 {
1769 if (rsa == NULL
1770 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1771 {
1772 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1773 goto f_err;
1774 }
1775 }
1776 else
1777 #endif
1778 #ifndef NO_DH
1779 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1780 {
1781 if (dh == NULL
1782 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1783 {
1784 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1785 goto f_err;
1786 }
1787 }
1788 else
1789 #endif
1790 {
1791 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1792 goto f_err;
1793 }
1794 }
1795 return(1);
1796 f_err:
1797 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1798 err:
1799 return(0);
1800 }
1801
Tomato firmware and modifications.