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authorcvs2svn <admin@example.com>2002-03-12 00:05:45 +0000
committercvs2svn <admin@example.com>2002-03-12 00:05:45 +0000
commit3779f2f4a8b544a7e4c362915322726b66cff114 (patch)
treeb6d77e66cbfdf6c0d8953fba2917f26f86fa50f6 /src/lib/libssl/s3_srvr.c
parentf39945c2b3b0f9e4950384bdb8effdac6eed9199 (diff)
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This commit was manufactured by cvs2git to create tag 'OPENBSD_3_1_BASE'.OPENBSD_3_1_BASE
Diffstat (limited to 'src/lib/libssl/s3_srvr.c')
-rw-r--r--src/lib/libssl/s3_srvr.c1777
1 files changed, 0 insertions, 1777 deletions
diff --git a/src/lib/libssl/s3_srvr.c b/src/lib/libssl/s3_srvr.c
deleted file mode 100644
index 258af84867..0000000000
--- a/src/lib/libssl/s3_srvr.c
+++ /dev/null
@@ -1,1777 +0,0 @@
1/* ssl/s3_srvr.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#define REUSE_CIPHER_BUG
60#define NETSCAPE_HANG_BUG
61
62
63#include <stdio.h>
64#include <openssl/buffer.h>
65#include <openssl/rand.h>
66#include <openssl/objects.h>
67#include <openssl/md5.h>
68#include <openssl/sha.h>
69#include <openssl/evp.h>
70#include <openssl/x509.h>
71#include "ssl_locl.h"
72
73static SSL_METHOD *ssl3_get_server_method(int ver);
74static int ssl3_get_client_hello(SSL *s);
75static int ssl3_check_client_hello(SSL *s);
76static int ssl3_send_server_hello(SSL *s);
77static int ssl3_send_server_key_exchange(SSL *s);
78static int ssl3_send_certificate_request(SSL *s);
79static int ssl3_send_server_done(SSL *s);
80static int ssl3_get_client_key_exchange(SSL *s);
81static int ssl3_get_client_certificate(SSL *s);
82static int ssl3_get_cert_verify(SSL *s);
83static int ssl3_send_hello_request(SSL *s);
84
85static SSL_METHOD *ssl3_get_server_method(int ver)
86 {
87 if (ver == SSL3_VERSION)
88 return(SSLv3_server_method());
89 else
90 return(NULL);
91 }
92
93SSL_METHOD *SSLv3_server_method(void)
94 {
95 static int init=1;
96 static SSL_METHOD SSLv3_server_data;
97
98 if (init)
99 {
100 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
101 sizeof(SSL_METHOD));
102 SSLv3_server_data.ssl_accept=ssl3_accept;
103 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
104 init=0;
105 }
106 return(&SSLv3_server_data);
107 }
108
109int ssl3_accept(SSL *s)
110 {
111 BUF_MEM *buf;
112 unsigned long l,Time=time(NULL);
113 void (*cb)()=NULL;
114 long num1;
115 int ret= -1;
116 int new_state,state,skip=0;
117
118 RAND_add(&Time,sizeof(Time),0);
119 ERR_clear_error();
120 clear_sys_error();
121
122 if (s->info_callback != NULL)
123 cb=s->info_callback;
124 else if (s->ctx->info_callback != NULL)
125 cb=s->ctx->info_callback;
126
127 /* init things to blank */
128 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
129 s->in_handshake++;
130
131 if (s->cert == NULL)
132 {
133 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
134 return(-1);
135 }
136
137 for (;;)
138 {
139 state=s->state;
140
141 switch (s->state)
142 {
143 case SSL_ST_RENEGOTIATE:
144 s->new_session=1;
145 /* s->state=SSL_ST_ACCEPT; */
146
147 case SSL_ST_BEFORE:
148 case SSL_ST_ACCEPT:
149 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
150 case SSL_ST_OK|SSL_ST_ACCEPT:
151
152 s->server=1;
153 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
154
155 if ((s->version>>8) != 3)
156 {
157 SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_INTERNAL_ERROR);
158 return -1;
159 }
160 s->type=SSL_ST_ACCEPT;
161
162 if (s->init_buf == NULL)
163 {
164 if ((buf=BUF_MEM_new()) == NULL)
165 {
166 ret= -1;
167 goto end;
168 }
169 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
170 {
171 ret= -1;
172 goto end;
173 }
174 s->init_buf=buf;
175 }
176
177 if (!ssl3_setup_buffers(s))
178 {
179 ret= -1;
180 goto end;
181 }
182
183 /* Ok, we now need to push on a buffering BIO so that
184 * the output is sent in a way that TCP likes :-)
185 */
186 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
187
188 s->init_num=0;
189
190 if (s->state != SSL_ST_RENEGOTIATE)
191 {
192 ssl3_init_finished_mac(s);
193 s->state=SSL3_ST_SR_CLNT_HELLO_A;
194 s->ctx->stats.sess_accept++;
195 }
196 else
197 {
198 s->ctx->stats.sess_accept_renegotiate++;
199 s->state=SSL3_ST_SW_HELLO_REQ_A;
200 }
201 break;
202
203 case SSL3_ST_SW_HELLO_REQ_A:
204 case SSL3_ST_SW_HELLO_REQ_B:
205
206 s->shutdown=0;
207 ret=ssl3_send_hello_request(s);
208 if (ret <= 0) goto end;
209 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
210 s->state=SSL3_ST_SW_FLUSH;
211 s->init_num=0;
212
213 ssl3_init_finished_mac(s);
214 break;
215
216 case SSL3_ST_SW_HELLO_REQ_C:
217 s->state=SSL_ST_OK;
218 ret=1;
219 goto end;
220 /* break; */
221
222 case SSL3_ST_SR_CLNT_HELLO_A:
223 case SSL3_ST_SR_CLNT_HELLO_B:
224 case SSL3_ST_SR_CLNT_HELLO_C:
225
226 s->shutdown=0;
227 ret=ssl3_get_client_hello(s);
228 if (ret <= 0) goto end;
229 s->state=SSL3_ST_SW_SRVR_HELLO_A;
230 s->init_num=0;
231 break;
232
233 case SSL3_ST_SW_SRVR_HELLO_A:
234 case SSL3_ST_SW_SRVR_HELLO_B:
235 ret=ssl3_send_server_hello(s);
236 if (ret <= 0) goto end;
237
238 if (s->hit)
239 s->state=SSL3_ST_SW_CHANGE_A;
240 else
241 s->state=SSL3_ST_SW_CERT_A;
242 s->init_num=0;
243 break;
244
245 case SSL3_ST_SW_CERT_A:
246 case SSL3_ST_SW_CERT_B:
247 /* Check if it is anon DH */
248 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
249 {
250 ret=ssl3_send_server_certificate(s);
251 if (ret <= 0) goto end;
252 }
253 else
254 skip=1;
255 s->state=SSL3_ST_SW_KEY_EXCH_A;
256 s->init_num=0;
257 break;
258
259 case SSL3_ST_SW_KEY_EXCH_A:
260 case SSL3_ST_SW_KEY_EXCH_B:
261 l=s->s3->tmp.new_cipher->algorithms;
262
263 /* clear this, it may get reset by
264 * send_server_key_exchange */
265 if (s->options & SSL_OP_EPHEMERAL_RSA)
266 s->s3->tmp.use_rsa_tmp=1;
267 else
268 s->s3->tmp.use_rsa_tmp=0;
269
270 /* only send if a DH key exchange, fortezza or
271 * RSA but we have a sign only certificate */
272 if (s->s3->tmp.use_rsa_tmp
273 || (l & (SSL_DH|SSL_kFZA))
274 || ((l & SSL_kRSA)
275 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
276 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
277 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
278 )
279 )
280 )
281 )
282 {
283 ret=ssl3_send_server_key_exchange(s);
284 if (ret <= 0) goto end;
285 }
286 else
287 skip=1;
288
289 s->state=SSL3_ST_SW_CERT_REQ_A;
290 s->init_num=0;
291 break;
292
293 case SSL3_ST_SW_CERT_REQ_A:
294 case SSL3_ST_SW_CERT_REQ_B:
295 if (/* don't request cert unless asked for it: */
296 !(s->verify_mode & SSL_VERIFY_PEER) ||
297 /* if SSL_VERIFY_CLIENT_ONCE is set,
298 * don't request cert during re-negotiation: */
299 ((s->session->peer != NULL) &&
300 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
301 /* never request cert in anonymous ciphersuites
302 * (see section "Certificate request" in SSL 3 drafts
303 * and in RFC 2246): */
304 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
305 /* ... except when the application insists on verification
306 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
307 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)))
308 {
309 /* no cert request */
310 skip=1;
311 s->s3->tmp.cert_request=0;
312 s->state=SSL3_ST_SW_SRVR_DONE_A;
313 }
314 else
315 {
316 s->s3->tmp.cert_request=1;
317 ret=ssl3_send_certificate_request(s);
318 if (ret <= 0) goto end;
319#ifndef NETSCAPE_HANG_BUG
320 s->state=SSL3_ST_SW_SRVR_DONE_A;
321#else
322 s->state=SSL3_ST_SW_FLUSH;
323 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
324#endif
325 s->init_num=0;
326 }
327 break;
328
329 case SSL3_ST_SW_SRVR_DONE_A:
330 case SSL3_ST_SW_SRVR_DONE_B:
331 ret=ssl3_send_server_done(s);
332 if (ret <= 0) goto end;
333 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
334 s->state=SSL3_ST_SW_FLUSH;
335 s->init_num=0;
336 break;
337
338 case SSL3_ST_SW_FLUSH:
339 /* number of bytes to be flushed */
340 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
341 if (num1 > 0)
342 {
343 s->rwstate=SSL_WRITING;
344 num1=BIO_flush(s->wbio);
345 if (num1 <= 0) { ret= -1; goto end; }
346 s->rwstate=SSL_NOTHING;
347 }
348
349 s->state=s->s3->tmp.next_state;
350 break;
351
352 case SSL3_ST_SR_CERT_A:
353 case SSL3_ST_SR_CERT_B:
354 /* Check for second client hello (MS SGC) */
355 ret = ssl3_check_client_hello(s);
356 if (ret <= 0)
357 goto end;
358 if (ret == 2)
359 s->state = SSL3_ST_SR_CLNT_HELLO_C;
360 else {
361 /* could be sent for a DH cert, even if we
362 * have not asked for it :-) */
363 ret=ssl3_get_client_certificate(s);
364 if (ret <= 0) goto end;
365 s->init_num=0;
366 s->state=SSL3_ST_SR_KEY_EXCH_A;
367 }
368 break;
369
370 case SSL3_ST_SR_KEY_EXCH_A:
371 case SSL3_ST_SR_KEY_EXCH_B:
372 ret=ssl3_get_client_key_exchange(s);
373 if (ret <= 0) goto end;
374 s->state=SSL3_ST_SR_CERT_VRFY_A;
375 s->init_num=0;
376
377 /* We need to get hashes here so if there is
378 * a client cert, it can be verified */
379 s->method->ssl3_enc->cert_verify_mac(s,
380 &(s->s3->finish_dgst1),
381 &(s->s3->tmp.cert_verify_md[0]));
382 s->method->ssl3_enc->cert_verify_mac(s,
383 &(s->s3->finish_dgst2),
384 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
385
386 break;
387
388 case SSL3_ST_SR_CERT_VRFY_A:
389 case SSL3_ST_SR_CERT_VRFY_B:
390
391 /* we should decide if we expected this one */
392 ret=ssl3_get_cert_verify(s);
393 if (ret <= 0) goto end;
394
395 s->state=SSL3_ST_SR_FINISHED_A;
396 s->init_num=0;
397 break;
398
399 case SSL3_ST_SR_FINISHED_A:
400 case SSL3_ST_SR_FINISHED_B:
401 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
402 SSL3_ST_SR_FINISHED_B);
403 if (ret <= 0) goto end;
404 if (s->hit)
405 s->state=SSL_ST_OK;
406 else
407 s->state=SSL3_ST_SW_CHANGE_A;
408 s->init_num=0;
409 break;
410
411 case SSL3_ST_SW_CHANGE_A:
412 case SSL3_ST_SW_CHANGE_B:
413
414 s->session->cipher=s->s3->tmp.new_cipher;
415 if (!s->method->ssl3_enc->setup_key_block(s))
416 { ret= -1; goto end; }
417
418 ret=ssl3_send_change_cipher_spec(s,
419 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
420
421 if (ret <= 0) goto end;
422 s->state=SSL3_ST_SW_FINISHED_A;
423 s->init_num=0;
424
425 if (!s->method->ssl3_enc->change_cipher_state(s,
426 SSL3_CHANGE_CIPHER_SERVER_WRITE))
427 {
428 ret= -1;
429 goto end;
430 }
431
432 break;
433
434 case SSL3_ST_SW_FINISHED_A:
435 case SSL3_ST_SW_FINISHED_B:
436 ret=ssl3_send_finished(s,
437 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
438 s->method->ssl3_enc->server_finished_label,
439 s->method->ssl3_enc->server_finished_label_len);
440 if (ret <= 0) goto end;
441 s->state=SSL3_ST_SW_FLUSH;
442 if (s->hit)
443 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
444 else
445 s->s3->tmp.next_state=SSL_ST_OK;
446 s->init_num=0;
447 break;
448
449 case SSL_ST_OK:
450 /* clean a few things up */
451 ssl3_cleanup_key_block(s);
452
453 BUF_MEM_free(s->init_buf);
454 s->init_buf=NULL;
455
456 /* remove buffering on output */
457 ssl_free_wbio_buffer(s);
458
459 s->new_session=0;
460 s->init_num=0;
461
462 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
463
464 s->ctx->stats.sess_accept_good++;
465 /* s->server=1; */
466 s->handshake_func=ssl3_accept;
467 ret=1;
468
469 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
470
471 goto end;
472 /* break; */
473
474 default:
475 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
476 ret= -1;
477 goto end;
478 /* break; */
479 }
480
481 if (!s->s3->tmp.reuse_message && !skip)
482 {
483 if (s->debug)
484 {
485 if ((ret=BIO_flush(s->wbio)) <= 0)
486 goto end;
487 }
488
489
490 if ((cb != NULL) && (s->state != state))
491 {
492 new_state=s->state;
493 s->state=state;
494 cb(s,SSL_CB_ACCEPT_LOOP,1);
495 s->state=new_state;
496 }
497 }
498 skip=0;
499 }
500end:
501 /* BIO_flush(s->wbio); */
502
503 if (cb != NULL)
504 cb(s,SSL_CB_ACCEPT_EXIT,ret);
505 s->in_handshake--;
506 return(ret);
507 }
508
509static int ssl3_send_hello_request(SSL *s)
510 {
511 unsigned char *p;
512
513 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
514 {
515 p=(unsigned char *)s->init_buf->data;
516 *(p++)=SSL3_MT_HELLO_REQUEST;
517 *(p++)=0;
518 *(p++)=0;
519 *(p++)=0;
520
521 s->state=SSL3_ST_SW_HELLO_REQ_B;
522 /* number of bytes to write */
523 s->init_num=4;
524 s->init_off=0;
525 }
526
527 /* SSL3_ST_SW_HELLO_REQ_B */
528 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
529 }
530
531static int ssl3_check_client_hello(SSL *s)
532 {
533 int ok;
534 long n;
535
536 n=ssl3_get_message(s,
537 SSL3_ST_SR_CERT_A,
538 SSL3_ST_SR_CERT_B,
539 -1,
540 SSL3_RT_MAX_PLAIN_LENGTH,
541 &ok);
542 if (!ok) return((int)n);
543 s->s3->tmp.reuse_message = 1;
544 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
545 {
546 /* Throw away what we have done so far in the current handshake,
547 * which will now be aborted. (A full SSL_clear would be too much.)
548 * I hope that tmp.dh is the only thing that may need to be cleared
549 * when a handshake is not completed ... */
550#ifndef NO_DH
551 if (s->s3->tmp.dh != NULL)
552 {
553 DH_free(s->s3->tmp.dh);
554 s->s3->tmp.dh = NULL;
555 }
556#endif
557 return 2;
558 }
559 return 1;
560}
561
562static int ssl3_get_client_hello(SSL *s)
563 {
564 int i,j,ok,al,ret= -1;
565 long n;
566 unsigned long id;
567 unsigned char *p,*d,*q;
568 SSL_CIPHER *c;
569 SSL_COMP *comp=NULL;
570 STACK_OF(SSL_CIPHER) *ciphers=NULL;
571
572 /* We do this so that we will respond with our native type.
573 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
574 * This down switching should be handled by a different method.
575 * If we are SSLv3, we will respond with SSLv3, even if prompted with
576 * TLSv1.
577 */
578 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
579 {
580 s->first_packet=1;
581 s->state=SSL3_ST_SR_CLNT_HELLO_B;
582 }
583 n=ssl3_get_message(s,
584 SSL3_ST_SR_CLNT_HELLO_B,
585 SSL3_ST_SR_CLNT_HELLO_C,
586 SSL3_MT_CLIENT_HELLO,
587 SSL3_RT_MAX_PLAIN_LENGTH,
588 &ok);
589
590 if (!ok) return((int)n);
591 d=p=(unsigned char *)s->init_buf->data;
592
593 /* use version from inside client hello, not from record header
594 * (may differ: see RFC 2246, Appendix E, second paragraph) */
595 s->client_version=(((int)p[0])<<8)|(int)p[1];
596 p+=2;
597
598 /* load the client random */
599 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
600 p+=SSL3_RANDOM_SIZE;
601
602 /* get the session-id */
603 j= *(p++);
604
605 s->hit=0;
606 if (j == 0)
607 {
608 if (!ssl_get_new_session(s,1))
609 goto err;
610 }
611 else
612 {
613 i=ssl_get_prev_session(s,p,j);
614 if (i == 1)
615 { /* previous session */
616 s->hit=1;
617 }
618 else if (i == -1)
619 goto err;
620 else /* i == 0 */
621 {
622 if (!ssl_get_new_session(s,1))
623 goto err;
624 }
625 }
626
627 p+=j;
628 n2s(p,i);
629 if ((i == 0) && (j != 0))
630 {
631 /* we need a cipher if we are not resuming a session */
632 al=SSL_AD_ILLEGAL_PARAMETER;
633 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
634 goto f_err;
635 }
636 if ((i+p) > (d+n))
637 {
638 /* not enough data */
639 al=SSL_AD_DECODE_ERROR;
640 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
641 goto f_err;
642 }
643 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
644 == NULL))
645 {
646 goto err;
647 }
648 p+=i;
649
650 /* If it is a hit, check that the cipher is in the list */
651 if ((s->hit) && (i > 0))
652 {
653 j=0;
654 id=s->session->cipher->id;
655
656#ifdef CIPHER_DEBUG
657 printf("client sent %d ciphers\n",sk_num(ciphers));
658#endif
659 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
660 {
661 c=sk_SSL_CIPHER_value(ciphers,i);
662#ifdef CIPHER_DEBUG
663 printf("client [%2d of %2d]:%s\n",
664 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
665#endif
666 if (c->id == id)
667 {
668 j=1;
669 break;
670 }
671 }
672 if (j == 0)
673 {
674 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
675 {
676 /* Very bad for multi-threading.... */
677 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
678 0);
679 }
680 else
681 {
682 /* we need to have the cipher in the cipher
683 * list if we are asked to reuse it */
684 al=SSL_AD_ILLEGAL_PARAMETER;
685 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
686 goto f_err;
687 }
688 }
689 }
690
691 /* compression */
692 i= *(p++);
693 q=p;
694 for (j=0; j<i; j++)
695 {
696 if (p[j] == 0) break;
697 }
698
699 p+=i;
700 if (j >= i)
701 {
702 /* no compress */
703 al=SSL_AD_DECODE_ERROR;
704 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
705 goto f_err;
706 }
707
708 /* Worst case, we will use the NULL compression, but if we have other
709 * options, we will now look for them. We have i-1 compression
710 * algorithms from the client, starting at q. */
711 s->s3->tmp.new_compression=NULL;
712 if (s->ctx->comp_methods != NULL)
713 { /* See if we have a match */
714 int m,nn,o,v,done=0;
715
716 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
717 for (m=0; m<nn; m++)
718 {
719 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
720 v=comp->id;
721 for (o=0; o<i; o++)
722 {
723 if (v == q[o])
724 {
725 done=1;
726 break;
727 }
728 }
729 if (done) break;
730 }
731 if (done)
732 s->s3->tmp.new_compression=comp;
733 else
734 comp=NULL;
735 }
736
737 /* TLS does not mind if there is extra stuff */
738 if (s->version == SSL3_VERSION)
739 {
740 if (p > (d+n))
741 {
742 /* wrong number of bytes,
743 * there could be more to follow */
744 al=SSL_AD_DECODE_ERROR;
745 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
746 goto f_err;
747 }
748 }
749
750 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
751 * pick a cipher */
752
753 if (!s->hit)
754 {
755 s->session->compress_meth=(comp == NULL)?0:comp->id;
756 if (s->session->ciphers != NULL)
757 sk_SSL_CIPHER_free(s->session->ciphers);
758 s->session->ciphers=ciphers;
759 if (ciphers == NULL)
760 {
761 al=SSL_AD_ILLEGAL_PARAMETER;
762 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
763 goto f_err;
764 }
765 ciphers=NULL;
766 c=ssl3_choose_cipher(s,s->session->ciphers,
767 ssl_get_ciphers_by_id(s));
768
769 if (c == NULL)
770 {
771 al=SSL_AD_HANDSHAKE_FAILURE;
772 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
773 goto f_err;
774 }
775 s->s3->tmp.new_cipher=c;
776 }
777 else
778 {
779 /* Session-id reuse */
780#ifdef REUSE_CIPHER_BUG
781 STACK_OF(SSL_CIPHER) *sk;
782 SSL_CIPHER *nc=NULL;
783 SSL_CIPHER *ec=NULL;
784
785 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
786 {
787 sk=s->session->ciphers;
788 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
789 {
790 c=sk_SSL_CIPHER_value(sk,i);
791 if (c->algorithms & SSL_eNULL)
792 nc=c;
793 if (SSL_C_IS_EXPORT(c))
794 ec=c;
795 }
796 if (nc != NULL)
797 s->s3->tmp.new_cipher=nc;
798 else if (ec != NULL)
799 s->s3->tmp.new_cipher=ec;
800 else
801 s->s3->tmp.new_cipher=s->session->cipher;
802 }
803 else
804#endif
805 s->s3->tmp.new_cipher=s->session->cipher;
806 }
807
808 /* we now have the following setup.
809 * client_random
810 * cipher_list - our prefered list of ciphers
811 * ciphers - the clients prefered list of ciphers
812 * compression - basically ignored right now
813 * ssl version is set - sslv3
814 * s->session - The ssl session has been setup.
815 * s->hit - session reuse flag
816 * s->tmp.new_cipher - the new cipher to use.
817 */
818
819 ret=1;
820 if (0)
821 {
822f_err:
823 ssl3_send_alert(s,SSL3_AL_FATAL,al);
824 }
825err:
826 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
827 return(ret);
828 }
829
830static int ssl3_send_server_hello(SSL *s)
831 {
832 unsigned char *buf;
833 unsigned char *p,*d;
834 int i,sl;
835 unsigned long l,Time;
836
837 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
838 {
839 buf=(unsigned char *)s->init_buf->data;
840 p=s->s3->server_random;
841 Time=time(NULL); /* Time */
842 l2n(Time,p);
843 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
844 /* Do the message type and length last */
845 d=p= &(buf[4]);
846
847 *(p++)=s->version>>8;
848 *(p++)=s->version&0xff;
849
850 /* Random stuff */
851 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
852 p+=SSL3_RANDOM_SIZE;
853
854 /* now in theory we have 3 options to sending back the
855 * session id. If it is a re-use, we send back the
856 * old session-id, if it is a new session, we send
857 * back the new session-id or we send back a 0 length
858 * session-id if we want it to be single use.
859 * Currently I will not implement the '0' length session-id
860 * 12-Jan-98 - I'll now support the '0' length stuff.
861 */
862 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
863 s->session->session_id_length=0;
864
865 sl=s->session->session_id_length;
866 *(p++)=sl;
867 memcpy(p,s->session->session_id,sl);
868 p+=sl;
869
870 /* put the cipher */
871 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
872 p+=i;
873
874 /* put the compression method */
875 if (s->s3->tmp.new_compression == NULL)
876 *(p++)=0;
877 else
878 *(p++)=s->s3->tmp.new_compression->id;
879
880 /* do the header */
881 l=(p-d);
882 d=buf;
883 *(d++)=SSL3_MT_SERVER_HELLO;
884 l2n3(l,d);
885
886 s->state=SSL3_ST_CW_CLNT_HELLO_B;
887 /* number of bytes to write */
888 s->init_num=p-buf;
889 s->init_off=0;
890 }
891
892 /* SSL3_ST_CW_CLNT_HELLO_B */
893 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
894 }
895
896static int ssl3_send_server_done(SSL *s)
897 {
898 unsigned char *p;
899
900 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
901 {
902 p=(unsigned char *)s->init_buf->data;
903
904 /* do the header */
905 *(p++)=SSL3_MT_SERVER_DONE;
906 *(p++)=0;
907 *(p++)=0;
908 *(p++)=0;
909
910 s->state=SSL3_ST_SW_SRVR_DONE_B;
911 /* number of bytes to write */
912 s->init_num=4;
913 s->init_off=0;
914 }
915
916 /* SSL3_ST_CW_CLNT_HELLO_B */
917 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
918 }
919
920static int ssl3_send_server_key_exchange(SSL *s)
921 {
922#ifndef NO_RSA
923 unsigned char *q;
924 int j,num;
925 RSA *rsa;
926 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
927 unsigned int u;
928#endif
929#ifndef NO_DH
930 DH *dh=NULL,*dhp;
931#endif
932 EVP_PKEY *pkey;
933 unsigned char *p,*d;
934 int al,i;
935 unsigned long type;
936 int n;
937 CERT *cert;
938 BIGNUM *r[4];
939 int nr[4],kn;
940 BUF_MEM *buf;
941 EVP_MD_CTX md_ctx;
942
943 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
944 {
945 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
946 cert=s->cert;
947
948 buf=s->init_buf;
949
950 r[0]=r[1]=r[2]=r[3]=NULL;
951 n=0;
952#ifndef NO_RSA
953 if (type & SSL_kRSA)
954 {
955 rsa=cert->rsa_tmp;
956 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
957 {
958 rsa=s->cert->rsa_tmp_cb(s,
959 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
960 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
961 if(rsa == NULL)
962 {
963 al=SSL_AD_HANDSHAKE_FAILURE;
964 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
965 goto f_err;
966 }
967 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
968 cert->rsa_tmp=rsa;
969 }
970 if (rsa == NULL)
971 {
972 al=SSL_AD_HANDSHAKE_FAILURE;
973 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
974 goto f_err;
975 }
976 r[0]=rsa->n;
977 r[1]=rsa->e;
978 s->s3->tmp.use_rsa_tmp=1;
979 }
980 else
981#endif
982#ifndef NO_DH
983 if (type & SSL_kEDH)
984 {
985 dhp=cert->dh_tmp;
986 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
987 dhp=s->cert->dh_tmp_cb(s,
988 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
989 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
990 if (dhp == NULL)
991 {
992 al=SSL_AD_HANDSHAKE_FAILURE;
993 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
994 goto f_err;
995 }
996
997 if (s->s3->tmp.dh != NULL)
998 {
999 DH_free(dh);
1000 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR);
1001 goto err;
1002 }
1003
1004 if ((dh=DHparams_dup(dhp)) == NULL)
1005 {
1006 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1007 goto err;
1008 }
1009
1010 s->s3->tmp.dh=dh;
1011 if ((dhp->pub_key == NULL ||
1012 dhp->priv_key == NULL ||
1013 (s->options & SSL_OP_SINGLE_DH_USE)))
1014 {
1015 if(!DH_generate_key(dh))
1016 {
1017 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1018 ERR_R_DH_LIB);
1019 goto err;
1020 }
1021 }
1022 else
1023 {
1024 dh->pub_key=BN_dup(dhp->pub_key);
1025 dh->priv_key=BN_dup(dhp->priv_key);
1026 if ((dh->pub_key == NULL) ||
1027 (dh->priv_key == NULL))
1028 {
1029 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1030 goto err;
1031 }
1032 }
1033 r[0]=dh->p;
1034 r[1]=dh->g;
1035 r[2]=dh->pub_key;
1036 }
1037 else
1038#endif
1039 {
1040 al=SSL_AD_HANDSHAKE_FAILURE;
1041 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1042 goto f_err;
1043 }
1044 for (i=0; r[i] != NULL; i++)
1045 {
1046 nr[i]=BN_num_bytes(r[i]);
1047 n+=2+nr[i];
1048 }
1049
1050 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1051 {
1052 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1053 == NULL)
1054 {
1055 al=SSL_AD_DECODE_ERROR;
1056 goto f_err;
1057 }
1058 kn=EVP_PKEY_size(pkey);
1059 }
1060 else
1061 {
1062 pkey=NULL;
1063 kn=0;
1064 }
1065
1066 if (!BUF_MEM_grow(buf,n+4+kn))
1067 {
1068 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1069 goto err;
1070 }
1071 d=(unsigned char *)s->init_buf->data;
1072 p= &(d[4]);
1073
1074 for (i=0; r[i] != NULL; i++)
1075 {
1076 s2n(nr[i],p);
1077 BN_bn2bin(r[i],p);
1078 p+=nr[i];
1079 }
1080
1081 /* not anonymous */
1082 if (pkey != NULL)
1083 {
1084 /* n is the length of the params, they start at &(d[4])
1085 * and p points to the space at the end. */
1086#ifndef NO_RSA
1087 if (pkey->type == EVP_PKEY_RSA)
1088 {
1089 q=md_buf;
1090 j=0;
1091 for (num=2; num > 0; num--)
1092 {
1093 EVP_DigestInit(&md_ctx,(num == 2)
1094 ?s->ctx->md5:s->ctx->sha1);
1095 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1096 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1097 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1098 EVP_DigestFinal(&md_ctx,q,
1099 (unsigned int *)&i);
1100 q+=i;
1101 j+=i;
1102 }
1103 if (RSA_sign(NID_md5_sha1, md_buf, j,
1104 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1105 {
1106 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1107 goto err;
1108 }
1109 s2n(u,p);
1110 n+=u+2;
1111 }
1112 else
1113#endif
1114#if !defined(NO_DSA)
1115 if (pkey->type == EVP_PKEY_DSA)
1116 {
1117 /* lets do DSS */
1118 EVP_SignInit(&md_ctx,EVP_dss1());
1119 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1120 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1121 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1122 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1123 (unsigned int *)&i,pkey))
1124 {
1125 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1126 goto err;
1127 }
1128 s2n(i,p);
1129 n+=i+2;
1130 }
1131 else
1132#endif
1133 {
1134 /* Is this error check actually needed? */
1135 al=SSL_AD_HANDSHAKE_FAILURE;
1136 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1137 goto f_err;
1138 }
1139 }
1140
1141 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1142 l2n3(n,d);
1143
1144 /* we should now have things packed up, so lets send
1145 * it off */
1146 s->init_num=n+4;
1147 s->init_off=0;
1148 }
1149
1150 s->state = SSL3_ST_SW_KEY_EXCH_B;
1151 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1152f_err:
1153 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1154err:
1155 return(-1);
1156 }
1157
1158static int ssl3_send_certificate_request(SSL *s)
1159 {
1160 unsigned char *p,*d;
1161 int i,j,nl,off,n;
1162 STACK_OF(X509_NAME) *sk=NULL;
1163 X509_NAME *name;
1164 BUF_MEM *buf;
1165
1166 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1167 {
1168 buf=s->init_buf;
1169
1170 d=p=(unsigned char *)&(buf->data[4]);
1171
1172 /* get the list of acceptable cert types */
1173 p++;
1174 n=ssl3_get_req_cert_type(s,p);
1175 d[0]=n;
1176 p+=n;
1177 n++;
1178
1179 off=n;
1180 p+=2;
1181 n+=2;
1182
1183 sk=SSL_get_client_CA_list(s);
1184 nl=0;
1185 if (sk != NULL)
1186 {
1187 for (i=0; i<sk_X509_NAME_num(sk); i++)
1188 {
1189 name=sk_X509_NAME_value(sk,i);
1190 j=i2d_X509_NAME(name,NULL);
1191 if (!BUF_MEM_grow(buf,4+n+j+2))
1192 {
1193 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1194 goto err;
1195 }
1196 p=(unsigned char *)&(buf->data[4+n]);
1197 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1198 {
1199 s2n(j,p);
1200 i2d_X509_NAME(name,&p);
1201 n+=2+j;
1202 nl+=2+j;
1203 }
1204 else
1205 {
1206 d=p;
1207 i2d_X509_NAME(name,&p);
1208 j-=2; s2n(j,d); j+=2;
1209 n+=j;
1210 nl+=j;
1211 }
1212 }
1213 }
1214 /* else no CA names */
1215 p=(unsigned char *)&(buf->data[4+off]);
1216 s2n(nl,p);
1217
1218 d=(unsigned char *)buf->data;
1219 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1220 l2n3(n,d);
1221
1222 /* we should now have things packed up, so lets send
1223 * it off */
1224
1225 s->init_num=n+4;
1226 s->init_off=0;
1227#ifdef NETSCAPE_HANG_BUG
1228 p=(unsigned char *)s->init_buf->data + s->init_num;
1229
1230 /* do the header */
1231 *(p++)=SSL3_MT_SERVER_DONE;
1232 *(p++)=0;
1233 *(p++)=0;
1234 *(p++)=0;
1235 s->init_num += 4;
1236#endif
1237
1238 }
1239
1240 /* SSL3_ST_SW_CERT_REQ_B */
1241 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1242err:
1243 return(-1);
1244 }
1245
1246static int ssl3_get_client_key_exchange(SSL *s)
1247 {
1248 int i,al,ok;
1249 long n;
1250 unsigned long l;
1251 unsigned char *p;
1252#ifndef NO_RSA
1253 RSA *rsa=NULL;
1254 EVP_PKEY *pkey=NULL;
1255#endif
1256#ifndef NO_DH
1257 BIGNUM *pub=NULL;
1258 DH *dh_srvr;
1259#endif
1260
1261 n=ssl3_get_message(s,
1262 SSL3_ST_SR_KEY_EXCH_A,
1263 SSL3_ST_SR_KEY_EXCH_B,
1264 SSL3_MT_CLIENT_KEY_EXCHANGE,
1265 400, /* ???? */
1266 &ok);
1267
1268 if (!ok) return((int)n);
1269 p=(unsigned char *)s->init_buf->data;
1270
1271 l=s->s3->tmp.new_cipher->algorithms;
1272
1273#ifndef NO_RSA
1274 if (l & SSL_kRSA)
1275 {
1276 /* FIX THIS UP EAY EAY EAY EAY */
1277 if (s->s3->tmp.use_rsa_tmp)
1278 {
1279 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1280 rsa=s->cert->rsa_tmp;
1281 /* Don't do a callback because rsa_tmp should
1282 * be sent already */
1283 if (rsa == NULL)
1284 {
1285 al=SSL_AD_HANDSHAKE_FAILURE;
1286 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1287 goto f_err;
1288
1289 }
1290 }
1291 else
1292 {
1293 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1294 if ( (pkey == NULL) ||
1295 (pkey->type != EVP_PKEY_RSA) ||
1296 (pkey->pkey.rsa == NULL))
1297 {
1298 al=SSL_AD_HANDSHAKE_FAILURE;
1299 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1300 goto f_err;
1301 }
1302 rsa=pkey->pkey.rsa;
1303 }
1304
1305 /* TLS */
1306 if (s->version > SSL3_VERSION)
1307 {
1308 n2s(p,i);
1309 if (n != i+2)
1310 {
1311 if (!(s->options & SSL_OP_TLS_D5_BUG))
1312 {
1313 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1314 goto err;
1315 }
1316 else
1317 p-=2;
1318 }
1319 else
1320 n=i;
1321 }
1322
1323 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1324
1325 al = -1;
1326
1327 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1328 {
1329 al=SSL_AD_DECODE_ERROR;
1330 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1331 }
1332
1333 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1334 {
1335 /* The premaster secret must contain the same version number as the
1336 * ClientHello to detect version rollback attacks (strangely, the
1337 * protocol does not offer such protection for DH ciphersuites).
1338 * However, buggy clients exist that send the negotiated protocol
1339 * version instead if the server does not support the requested
1340 * protocol version.
1341 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1342 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1343 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1344 {
1345 al=SSL_AD_DECODE_ERROR;
1346 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1347 goto f_err;
1348 }
1349 }
1350
1351 if (al != -1)
1352 {
1353#if 0
1354 goto f_err;
1355#else
1356 /* Some decryption failure -- use random value instead as countermeasure
1357 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1358 * (see RFC 2246, section 7.4.7.1).
1359 * But note that due to length and protocol version checking, the
1360 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1361 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1362 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1363 */
1364 ERR_clear_error();
1365 i = SSL_MAX_MASTER_KEY_LENGTH;
1366 p[0] = s->client_version >> 8;
1367 p[1] = s->client_version & 0xff;
1368 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1369#endif
1370 }
1371
1372 s->session->master_key_length=
1373 s->method->ssl3_enc->generate_master_secret(s,
1374 s->session->master_key,
1375 p,i);
1376 memset(p,0,i);
1377 }
1378 else
1379#endif
1380#ifndef NO_DH
1381 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1382 {
1383 n2s(p,i);
1384 if (n != i+2)
1385 {
1386 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1387 {
1388 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1389 goto err;
1390 }
1391 else
1392 {
1393 p-=2;
1394 i=(int)n;
1395 }
1396 }
1397
1398 if (n == 0L) /* the parameters are in the cert */
1399 {
1400 al=SSL_AD_HANDSHAKE_FAILURE;
1401 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1402 goto f_err;
1403 }
1404 else
1405 {
1406 if (s->s3->tmp.dh == NULL)
1407 {
1408 al=SSL_AD_HANDSHAKE_FAILURE;
1409 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1410 goto f_err;
1411 }
1412 else
1413 dh_srvr=s->s3->tmp.dh;
1414 }
1415
1416 pub=BN_bin2bn(p,i,NULL);
1417 if (pub == NULL)
1418 {
1419 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1420 goto err;
1421 }
1422
1423 i=DH_compute_key(p,pub,dh_srvr);
1424
1425 if (i <= 0)
1426 {
1427 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1428 goto err;
1429 }
1430
1431 DH_free(s->s3->tmp.dh);
1432 s->s3->tmp.dh=NULL;
1433
1434 BN_clear_free(pub);
1435 pub=NULL;
1436 s->session->master_key_length=
1437 s->method->ssl3_enc->generate_master_secret(s,
1438 s->session->master_key,p,i);
1439 memset(p,0,i);
1440 }
1441 else
1442#endif
1443 {
1444 al=SSL_AD_HANDSHAKE_FAILURE;
1445 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1446 goto f_err;
1447 }
1448
1449 return(1);
1450f_err:
1451 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1452#if !defined(NO_DH) || !defined(NO_RSA)
1453err:
1454#endif
1455 return(-1);
1456 }
1457
1458static int ssl3_get_cert_verify(SSL *s)
1459 {
1460 EVP_PKEY *pkey=NULL;
1461 unsigned char *p;
1462 int al,ok,ret=0;
1463 long n;
1464 int type=0,i,j;
1465 X509 *peer;
1466
1467 n=ssl3_get_message(s,
1468 SSL3_ST_SR_CERT_VRFY_A,
1469 SSL3_ST_SR_CERT_VRFY_B,
1470 -1,
1471 512, /* 512? */
1472 &ok);
1473
1474 if (!ok) return((int)n);
1475
1476 if (s->session->peer != NULL)
1477 {
1478 peer=s->session->peer;
1479 pkey=X509_get_pubkey(peer);
1480 type=X509_certificate_type(peer,pkey);
1481 }
1482 else
1483 {
1484 peer=NULL;
1485 pkey=NULL;
1486 }
1487
1488 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1489 {
1490 s->s3->tmp.reuse_message=1;
1491 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1492 {
1493 al=SSL_AD_UNEXPECTED_MESSAGE;
1494 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1495 goto f_err;
1496 }
1497 ret=1;
1498 goto end;
1499 }
1500
1501 if (peer == NULL)
1502 {
1503 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1504 al=SSL_AD_UNEXPECTED_MESSAGE;
1505 goto f_err;
1506 }
1507
1508 if (!(type & EVP_PKT_SIGN))
1509 {
1510 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1511 al=SSL_AD_ILLEGAL_PARAMETER;
1512 goto f_err;
1513 }
1514
1515 if (s->s3->change_cipher_spec)
1516 {
1517 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1518 al=SSL_AD_UNEXPECTED_MESSAGE;
1519 goto f_err;
1520 }
1521
1522 /* we now have a signature that we need to verify */
1523 p=(unsigned char *)s->init_buf->data;
1524 n2s(p,i);
1525 n-=2;
1526 if (i > n)
1527 {
1528 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1529 al=SSL_AD_DECODE_ERROR;
1530 goto f_err;
1531 }
1532
1533 j=EVP_PKEY_size(pkey);
1534 if ((i > j) || (n > j) || (n <= 0))
1535 {
1536 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1537 al=SSL_AD_DECODE_ERROR;
1538 goto f_err;
1539 }
1540
1541#ifndef NO_RSA
1542 if (pkey->type == EVP_PKEY_RSA)
1543 {
1544 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1545 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1546 pkey->pkey.rsa);
1547 if (i < 0)
1548 {
1549 al=SSL_AD_DECRYPT_ERROR;
1550 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1551 goto f_err;
1552 }
1553 if (i == 0)
1554 {
1555 al=SSL_AD_DECRYPT_ERROR;
1556 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1557 goto f_err;
1558 }
1559 }
1560 else
1561#endif
1562#ifndef NO_DSA
1563 if (pkey->type == EVP_PKEY_DSA)
1564 {
1565 j=DSA_verify(pkey->save_type,
1566 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1567 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1568 if (j <= 0)
1569 {
1570 /* bad signature */
1571 al=SSL_AD_DECRYPT_ERROR;
1572 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1573 goto f_err;
1574 }
1575 }
1576 else
1577#endif
1578 {
1579 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1580 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1581 goto f_err;
1582 }
1583
1584
1585 ret=1;
1586 if (0)
1587 {
1588f_err:
1589 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1590 }
1591end:
1592 EVP_PKEY_free(pkey);
1593 return(ret);
1594 }
1595
1596static int ssl3_get_client_certificate(SSL *s)
1597 {
1598 int i,ok,al,ret= -1;
1599 X509 *x=NULL;
1600 unsigned long l,nc,llen,n;
1601 unsigned char *p,*d,*q;
1602 STACK_OF(X509) *sk=NULL;
1603
1604 n=ssl3_get_message(s,
1605 SSL3_ST_SR_CERT_A,
1606 SSL3_ST_SR_CERT_B,
1607 -1,
1608#if defined(MSDOS) && !defined(WIN32)
1609 1024*30, /* 30k max cert list :-) */
1610#else
1611 1024*100, /* 100k max cert list :-) */
1612#endif
1613 &ok);
1614
1615 if (!ok) return((int)n);
1616
1617 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1618 {
1619 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1620 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1621 {
1622 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1623 al=SSL_AD_HANDSHAKE_FAILURE;
1624 goto f_err;
1625 }
1626 /* If tls asked for a client cert, the client must return a 0 list */
1627 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1628 {
1629 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1630 al=SSL_AD_UNEXPECTED_MESSAGE;
1631 goto f_err;
1632 }
1633 s->s3->tmp.reuse_message=1;
1634 return(1);
1635 }
1636
1637 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1638 {
1639 al=SSL_AD_UNEXPECTED_MESSAGE;
1640 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1641 goto f_err;
1642 }
1643 d=p=(unsigned char *)s->init_buf->data;
1644
1645 if ((sk=sk_X509_new_null()) == NULL)
1646 {
1647 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1648 goto err;
1649 }
1650
1651 n2l3(p,llen);
1652 if (llen+3 != n)
1653 {
1654 al=SSL_AD_DECODE_ERROR;
1655 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1656 goto f_err;
1657 }
1658 for (nc=0; nc<llen; )
1659 {
1660 n2l3(p,l);
1661 if ((l+nc+3) > llen)
1662 {
1663 al=SSL_AD_DECODE_ERROR;
1664 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1665 goto f_err;
1666 }
1667
1668 q=p;
1669 x=d2i_X509(NULL,&p,l);
1670 if (x == NULL)
1671 {
1672 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1673 goto err;
1674 }
1675 if (p != (q+l))
1676 {
1677 al=SSL_AD_DECODE_ERROR;
1678 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1679 goto f_err;
1680 }
1681 if (!sk_X509_push(sk,x))
1682 {
1683 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1684 goto err;
1685 }
1686 x=NULL;
1687 nc+=l+3;
1688 }
1689
1690 if (sk_X509_num(sk) <= 0)
1691 {
1692 /* TLS does not mind 0 certs returned */
1693 if (s->version == SSL3_VERSION)
1694 {
1695 al=SSL_AD_HANDSHAKE_FAILURE;
1696 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1697 goto f_err;
1698 }
1699 /* Fail for TLS only if we required a certificate */
1700 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1701 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1702 {
1703 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1704 al=SSL_AD_HANDSHAKE_FAILURE;
1705 goto f_err;
1706 }
1707 }
1708 else
1709 {
1710 i=ssl_verify_cert_chain(s,sk);
1711 if (!i)
1712 {
1713 al=ssl_verify_alarm_type(s->verify_result);
1714 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1715 goto f_err;
1716 }
1717 }
1718
1719 if (s->session->peer != NULL) /* This should not be needed */
1720 X509_free(s->session->peer);
1721 s->session->peer=sk_X509_shift(sk);
1722 s->session->verify_result = s->verify_result;
1723
1724 /* With the current implementation, sess_cert will always be NULL
1725 * when we arrive here. */
1726 if (s->session->sess_cert == NULL)
1727 {
1728 s->session->sess_cert = ssl_sess_cert_new();
1729 if (s->session->sess_cert == NULL)
1730 {
1731 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1732 goto err;
1733 }
1734 }
1735 if (s->session->sess_cert->cert_chain != NULL)
1736 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1737 s->session->sess_cert->cert_chain=sk;
1738 /* Inconsistency alert: cert_chain does *not* include the
1739 * peer's own certificate, while we do include it in s3_clnt.c */
1740
1741 sk=NULL;
1742
1743 ret=1;
1744 if (0)
1745 {
1746f_err:
1747 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1748 }
1749err:
1750 if (x != NULL) X509_free(x);
1751 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1752 return(ret);
1753 }
1754
1755int ssl3_send_server_certificate(SSL *s)
1756 {
1757 unsigned long l;
1758 X509 *x;
1759
1760 if (s->state == SSL3_ST_SW_CERT_A)
1761 {
1762 x=ssl_get_server_send_cert(s);
1763 if (x == NULL)
1764 {
1765 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1766 return(0);
1767 }
1768
1769 l=ssl3_output_cert_chain(s,x);
1770 s->state=SSL3_ST_SW_CERT_B;
1771 s->init_num=(int)l;
1772 s->init_off=0;
1773 }
1774
1775 /* SSL3_ST_SW_CERT_B */
1776 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1777 }
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