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-rw-r--r--src/lib/libssl/s3_srvr.c1675
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diff --git a/src/lib/libssl/s3_srvr.c b/src/lib/libssl/s3_srvr.c
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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
61#include <stdio.h>
62#include "buffer.h"
63#include "rand.h"
64#include "objects.h"
65#include "evp.h"
66#include "x509.h"
67#include "ssl_locl.h"
68
69#define BREAK break
70/* SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_MALLOC_FAILURE);
71 * SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
72 * SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
73 * SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_MALLOC_FAILURE);
74 * SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
75 */
76
77#ifndef NOPROTO
78static int ssl3_get_client_hello(SSL *s);
79static int ssl3_send_server_hello(SSL *s);
80static int ssl3_send_server_key_exchange(SSL *s);
81static int ssl3_send_certificate_request(SSL *s);
82static int ssl3_send_server_done(SSL *s);
83static int ssl3_get_cert_verify(SSL *s);
84static int ssl3_get_client_key_exchange(SSL *s);
85static int ssl3_get_client_certificate(SSL *s);
86static int ssl3_send_hello_request(SSL *s);
87
88#else
89
90static int ssl3_get_client_hello();
91static int ssl3_send_server_hello();
92static int ssl3_send_server_key_exchange();
93static int ssl3_send_certificate_request();
94static int ssl3_send_server_done();
95static int ssl3_get_cert_verify();
96static int ssl3_get_client_key_exchange();
97static int ssl3_get_client_certificate();
98static int ssl3_send_hello_request();
99
100#endif
101
102static SSL_METHOD *ssl3_get_server_method(ver)
103int ver;
104 {
105 if (ver == SSL3_VERSION)
106 return(SSLv3_server_method());
107 else
108 return(NULL);
109 }
110
111SSL_METHOD *SSLv3_server_method()
112 {
113 static int init=1;
114 static SSL_METHOD SSLv3_server_data;
115
116 if (init)
117 {
118 init=0;
119 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
120 sizeof(SSL_METHOD));
121 SSLv3_server_data.ssl_accept=ssl3_accept;
122 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
123 }
124 return(&SSLv3_server_data);
125 }
126
127int ssl3_accept(s)
128SSL *s;
129 {
130 BUF_MEM *buf;
131 unsigned long l,Time=time(NULL);
132 void (*cb)()=NULL;
133 long num1;
134 int ret= -1;
135 CERT *ct;
136 BIO *under;
137 int new_state,state,skip=0;
138
139 RAND_seed((unsigned char *)&Time,sizeof(Time));
140 ERR_clear_error();
141 clear_sys_error();
142
143 if (s->info_callback != NULL)
144 cb=s->info_callback;
145 else if (s->ctx->info_callback != NULL)
146 cb=s->ctx->info_callback;
147
148 /* init things to blank */
149 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
150 s->in_handshake++;
151
152#ifdef undef
153 /* FIX THIS EAY EAY EAY */
154 /* we don't actually need a cert, we just need a cert or a DH_tmp */
155 if (((s->session == NULL) || (s->session->cert == NULL)) &&
156 (s->cert == NULL))
157 {
158 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
159 ret= -1;
160 goto end;
161 }
162#endif
163
164 for (;;)
165 {
166 state=s->state;
167
168 switch (s->state)
169 {
170 case SSL_ST_RENEGOTIATE:
171 s->new_session=1;
172 /* s->state=SSL_ST_ACCEPT; */
173
174 case SSL_ST_BEFORE:
175 case SSL_ST_ACCEPT:
176 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
177 case SSL_ST_OK|SSL_ST_ACCEPT:
178
179 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
180
181 if ((s->version>>8) != 3)
182 abort();
183 /* s->version=SSL3_VERSION; */
184 s->type=SSL_ST_ACCEPT;
185
186 if (s->init_buf == NULL)
187 {
188 if ((buf=BUF_MEM_new()) == NULL)
189 {
190 ret= -1;
191 goto end;
192 }
193 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
194 {
195 ret= -1;
196 goto end;
197 }
198 s->init_buf=buf;
199 }
200
201 if (!ssl3_setup_buffers(s))
202 {
203 ret= -1;
204 goto end;
205 }
206
207 /* Ok, we now need to push on a buffering BIO so that
208 * the output is sent in a way that TCP likes :-)
209 */
210 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
211
212 s->init_num=0;
213
214 if (s->state != SSL_ST_RENEGOTIATE)
215 {
216 s->state=SSL3_ST_SR_CLNT_HELLO_A;
217 ssl3_init_finished_mac(s);
218 s->ctx->sess_accept++;
219 }
220 else
221 {
222 s->ctx->sess_accept_renegotiate++;
223 s->state=SSL3_ST_SW_HELLO_REQ_A;
224 }
225 break;
226
227 case SSL3_ST_SW_HELLO_REQ_A:
228 case SSL3_ST_SW_HELLO_REQ_B:
229
230 s->shutdown=0;
231 ret=ssl3_send_hello_request(s);
232 if (ret <= 0) goto end;
233 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
234 s->state=SSL3_ST_SW_FLUSH;
235 s->init_num=0;
236
237 ssl3_init_finished_mac(s);
238 break;
239
240 case SSL3_ST_SW_HELLO_REQ_C:
241 /* remove buffering on output */
242 under=BIO_pop(s->wbio);
243 if (under != NULL)
244 s->wbio=under;
245 else
246 abort(); /* ok */
247 BIO_free(s->bbio);
248 s->bbio=NULL;
249
250 s->state=SSL_ST_OK;
251 ret=1;
252 goto end;
253 /* break; */
254
255 case SSL3_ST_SR_CLNT_HELLO_A:
256 case SSL3_ST_SR_CLNT_HELLO_B:
257 case SSL3_ST_SR_CLNT_HELLO_C:
258
259 s->shutdown=0;
260 ret=ssl3_get_client_hello(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_SW_SRVR_HELLO_A;
263 s->init_num=0;
264 break;
265
266 case SSL3_ST_SW_SRVR_HELLO_A:
267 case SSL3_ST_SW_SRVR_HELLO_B:
268 ret=ssl3_send_server_hello(s);
269 if (ret <= 0) goto end;
270
271 if (s->hit)
272 s->state=SSL3_ST_SW_CHANGE_A;
273 else
274 s->state=SSL3_ST_SW_CERT_A;
275 s->init_num=0;
276 break;
277
278 case SSL3_ST_SW_CERT_A:
279 case SSL3_ST_SW_CERT_B:
280 /* Check if it is anon DH */
281 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
282 {
283 ret=ssl3_send_server_certificate(s);
284 if (ret <= 0) goto end;
285 }
286 else
287 skip=1;
288 s->state=SSL3_ST_SW_KEY_EXCH_A;
289 s->init_num=0;
290 break;
291
292 case SSL3_ST_SW_KEY_EXCH_A:
293 case SSL3_ST_SW_KEY_EXCH_B:
294 l=s->s3->tmp.new_cipher->algorithms;
295 if (s->session->cert == NULL)
296 {
297 if (s->cert != NULL)
298 {
299 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
300 s->session->cert=s->cert;
301 }
302 else
303 {
304 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
305 s->session->cert=s->ctx->default_cert;
306 }
307 }
308 ct=s->session->cert;
309
310 /* clear this, it may get reset by
311 * send_server_key_exchange */
312 if (s->options & SSL_OP_EPHEMERAL_RSA)
313 s->s3->tmp.use_rsa_tmp=1;
314 else
315 s->s3->tmp.use_rsa_tmp=0;
316
317 /* only send if a DH key exchange, fortezza or
318 * RSA but we have a sign only certificate */
319 if ( s->s3->tmp.use_rsa_tmp ||
320 (l & (SSL_DH|SSL_kFZA)) ||
321 ((l & SSL_kRSA) &&
322 ((ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)||
323 ((l & SSL_EXPORT) &&
324 (EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > 512)
325 )
326 )
327 )
328 )
329 {
330 ret=ssl3_send_server_key_exchange(s);
331 if (ret <= 0) goto end;
332 }
333 else
334 skip=1;
335
336 s->state=SSL3_ST_SW_CERT_REQ_A;
337 s->init_num=0;
338 break;
339
340 case SSL3_ST_SW_CERT_REQ_A:
341 case SSL3_ST_SW_CERT_REQ_B:
342 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
343 ((s->session->peer != NULL) &&
344 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
345 {
346 /* no cert request */
347 skip=1;
348 s->s3->tmp.cert_request=0;
349 s->state=SSL3_ST_SW_SRVR_DONE_A;
350 }
351 else
352 {
353 s->s3->tmp.cert_request=1;
354 ret=ssl3_send_certificate_request(s);
355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_SW_SRVR_DONE_A;
357 s->init_num=0;
358 }
359 break;
360
361 case SSL3_ST_SW_SRVR_DONE_A:
362 case SSL3_ST_SW_SRVR_DONE_B:
363 ret=ssl3_send_server_done(s);
364 if (ret <= 0) goto end;
365 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
366 s->state=SSL3_ST_SW_FLUSH;
367 s->init_num=0;
368 break;
369
370 case SSL3_ST_SW_FLUSH:
371 /* number of bytes to be flushed */
372 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
373 if (num1 > 0)
374 {
375 s->rwstate=SSL_WRITING;
376 num1=BIO_flush(s->wbio);
377 if (num1 <= 0) { ret= -1; goto end; }
378 s->rwstate=SSL_NOTHING;
379 }
380
381 s->state=s->s3->tmp.next_state;
382 break;
383
384 case SSL3_ST_SR_CERT_A:
385 case SSL3_ST_SR_CERT_B:
386 /* could be sent for a DH cert, even if we
387 * have not asked for it :-) */
388 ret=ssl3_get_client_certificate(s);
389 if (ret <= 0) goto end;
390 s->init_num=0;
391 s->state=SSL3_ST_SR_KEY_EXCH_A;
392 break;
393
394 case SSL3_ST_SR_KEY_EXCH_A:
395 case SSL3_ST_SR_KEY_EXCH_B:
396 ret=ssl3_get_client_key_exchange(s);
397 if (ret <= 0) goto end;
398 s->state=SSL3_ST_SR_CERT_VRFY_A;
399 s->init_num=0;
400
401 /* We need to get hashes here so if there is
402 * a client cert, it can be verified */
403 s->method->ssl3_enc->cert_verify_mac(s,
404 &(s->s3->finish_dgst1),
405 &(s->s3->tmp.finish_md[0]));
406 s->method->ssl3_enc->cert_verify_mac(s,
407 &(s->s3->finish_dgst2),
408 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
409
410 break;
411
412 case SSL3_ST_SR_CERT_VRFY_A:
413 case SSL3_ST_SR_CERT_VRFY_B:
414
415 /* we should decide if we expected this one */
416 ret=ssl3_get_cert_verify(s);
417 if (ret <= 0) goto end;
418
419 s->state=SSL3_ST_SR_FINISHED_A;
420 s->init_num=0;
421 break;
422
423 case SSL3_ST_SR_FINISHED_A:
424 case SSL3_ST_SR_FINISHED_B:
425 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
426 SSL3_ST_SR_FINISHED_B);
427 if (ret <= 0) goto end;
428 if (s->hit)
429 s->state=SSL_ST_OK;
430 else
431 s->state=SSL3_ST_SW_CHANGE_A;
432 s->init_num=0;
433 break;
434
435 case SSL3_ST_SW_CHANGE_A:
436 case SSL3_ST_SW_CHANGE_B:
437
438 s->session->cipher=s->s3->tmp.new_cipher;
439 if (!s->method->ssl3_enc->setup_key_block(s))
440 { ret= -1; goto end; }
441
442 ret=ssl3_send_change_cipher_spec(s,
443 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
444
445 if (ret <= 0) goto end;
446 s->state=SSL3_ST_SW_FINISHED_A;
447 s->init_num=0;
448
449 if (!s->method->ssl3_enc->change_cipher_state(s,
450 SSL3_CHANGE_CIPHER_SERVER_WRITE))
451 {
452 ret= -1;
453 goto end;
454 }
455
456 break;
457
458 case SSL3_ST_SW_FINISHED_A:
459 case SSL3_ST_SW_FINISHED_B:
460 ret=ssl3_send_finished(s,
461 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
462 s->method->ssl3_enc->server_finished,
463 s->method->ssl3_enc->server_finished_len);
464 if (ret <= 0) goto end;
465 s->state=SSL3_ST_SW_FLUSH;
466 if (s->hit)
467 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
468 else
469 s->s3->tmp.next_state=SSL_ST_OK;
470 s->init_num=0;
471 break;
472
473 case SSL_ST_OK:
474 /* clean a few things up */
475 ssl3_cleanup_key_block(s);
476
477 BUF_MEM_free(s->init_buf);
478 s->init_buf=NULL;
479
480 /* remove buffering on output */
481 under=BIO_pop(s->wbio);
482 if (under != NULL)
483 s->wbio=under;
484 else
485 abort(); /* ok */
486 BIO_free(s->bbio);
487 s->bbio=NULL;
488
489 s->new_session=0;
490 s->init_num=0;
491
492 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
493
494 s->ctx->sess_accept_good++;
495 /* s->server=1; */
496 s->handshake_func=ssl3_accept;
497 ret=1;
498
499 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
500
501 goto end;
502 /* break; */
503
504 default:
505 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
506 ret= -1;
507 goto end;
508 /* break; */
509 }
510
511 if (!s->s3->tmp.reuse_message && !skip)
512 {
513 if (s->debug)
514 {
515 if ((ret=BIO_flush(s->wbio)) <= 0)
516 goto end;
517 }
518
519
520 if ((cb != NULL) && (s->state != state))
521 {
522 new_state=s->state;
523 s->state=state;
524 cb(s,SSL_CB_ACCEPT_LOOP,1);
525 s->state=new_state;
526 }
527 }
528 skip=0;
529 }
530end:
531 /* BIO_flush(s->wbio); */
532
533 if (cb != NULL)
534 cb(s,SSL_CB_ACCEPT_EXIT,ret);
535 s->in_handshake--;
536 return(ret);
537 }
538
539static int ssl3_send_hello_request(s)
540SSL *s;
541 {
542 unsigned char *p;
543
544 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
545 {
546 p=(unsigned char *)s->init_buf->data;
547 *(p++)=SSL3_MT_CLIENT_REQUEST;
548 *(p++)=0;
549 *(p++)=0;
550 *(p++)=0;
551
552 s->state=SSL3_ST_SW_HELLO_REQ_B;
553 /* number of bytes to write */
554 s->init_num=4;
555 s->init_off=0;
556 }
557
558 /* SSL3_ST_SW_HELLO_REQ_B */
559 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
560 }
561
562static int ssl3_get_client_hello(s)
563SSL *s;
564 {
565 int i,j,ok,al,ret= -1;
566 long n;
567 unsigned long id;
568 unsigned char *p,*d;
569 SSL_CIPHER *c;
570 STACK *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 /* The version number has already been checked in ssl3_get_message.
594 * I a native TLSv1/SSLv3 method, the match must be correct except
595 * perhaps for the first message */
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
619 {
620 if (!ssl_get_new_session(s,1))
621 goto err;
622 }
623 }
624
625 p+=j;
626 n2s(p,i);
627 if ((i == 0) && (j != 0))
628 {
629 /* we need a cipher if we are not resuming a session */
630 al=SSL_AD_ILLEGAL_PARAMETER;
631 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
632 goto f_err;
633 }
634 if ((i+p) > (d+n))
635 {
636 /* not enough data */
637 al=SSL_AD_DECODE_ERROR;
638 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
639 goto f_err;
640 }
641 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
642 == NULL))
643 {
644 goto err;
645 }
646 p+=i;
647
648 /* If it is a hit, check that the cipher is in the list */
649 if ((s->hit) && (i > 0))
650 {
651 j=0;
652 id=s->session->cipher->id;
653
654 for (i=0; i<sk_num(ciphers); i++)
655 {
656 c=(SSL_CIPHER *)sk_value(ciphers,i);
657 if (c->id == id)
658 {
659 j=1;
660 break;
661 }
662 }
663 if (j == 0)
664 {
665 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_num(ciphers) == 1))
666 {
667 /* Very bad for multi-threading.... */
668 s->session->cipher=
669 (SSL_CIPHER *)sk_value(ciphers,0);
670 }
671 else
672 {
673 /* we need to have the cipher in the cipher
674 * list if we are asked to reuse it */
675 al=SSL_AD_ILLEGAL_PARAMETER;
676 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
677 goto f_err;
678 }
679 }
680 }
681
682 /* compression */
683 i= *(p++);
684 for (j=0; j<i; j++)
685 if (p[j] == 0) break;
686
687 p+=i;
688 if (j >= i)
689 {
690 /* no compress */
691 al=SSL_AD_DECODE_ERROR;
692 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
693 goto f_err;
694 }
695
696 /* TLS does not mind if there is extra stuff */
697 if (s->version == SSL3_VERSION)
698 {
699 if (p > (d+n))
700 {
701 /* wrong number of bytes,
702 * there could be more to follow */
703 al=SSL_AD_DECODE_ERROR;
704 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
705 goto f_err;
706 }
707 }
708
709 /* do nothing with compression */
710
711 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
712 * pick a cipher */
713
714 if (!s->hit)
715 {
716 if (s->session->ciphers != NULL)
717 sk_free(s->session->ciphers);
718 s->session->ciphers=ciphers;
719 if (ciphers == NULL)
720 {
721 al=SSL_AD_ILLEGAL_PARAMETER;
722 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
723 goto f_err;
724 }
725 ciphers=NULL;
726 c=ssl3_choose_cipher(s,s->session->ciphers,
727 ssl_get_ciphers_by_id(s));
728
729 if (c == NULL)
730 {
731 al=SSL_AD_HANDSHAKE_FAILURE;
732 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
733 goto f_err;
734 }
735 s->s3->tmp.new_cipher=c;
736 }
737 else
738 {
739 /* Session-id reuse */
740#ifdef REUSE_CIPHER_BUG
741 STACK *sk;
742 SSL_CIPHER *nc=NULL;
743 SSL_CIPHER *ec=NULL;
744
745 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
746 {
747 sk=s->session->ciphers;
748 for (i=0; i<sk_num(sk); i++)
749 {
750 c=(SSL_CIPHER *)sk_value(sk,i);
751 if (c->algorithms & SSL_eNULL)
752 nc=c;
753 if (c->algorithms & SSL_EXP)
754 ec=c;
755 }
756 if (nc != NULL)
757 s->s3->tmp.new_cipher=nc;
758 else if (ec != NULL)
759 s->s3->tmp.new_cipher=ec;
760 else
761 s->s3->tmp.new_cipher=s->session->cipher;
762 }
763 else
764#endif
765 s->s3->tmp.new_cipher=s->session->cipher;
766 }
767
768 /* we now have the following setup.
769 * client_random
770 * cipher_list - our prefered list of ciphers
771 * ciphers - the clients prefered list of ciphers
772 * compression - basically ignored right now
773 * ssl version is set - sslv3
774 * s->session - The ssl session has been setup.
775 * s->hit - sesson reuse flag
776 * s->tmp.new_cipher - the new cipher to use.
777 */
778
779 ret=1;
780 if (0)
781 {
782f_err:
783 ssl3_send_alert(s,SSL3_AL_FATAL,al);
784 }
785err:
786 if (ciphers != NULL) sk_free(ciphers);
787 return(ret);
788 }
789
790static int ssl3_send_server_hello(s)
791SSL *s;
792 {
793 unsigned char *buf;
794 unsigned char *p,*d;
795 int i,sl;
796 unsigned long l,Time;
797
798 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
799 {
800 buf=(unsigned char *)s->init_buf->data;
801 p=s->s3->server_random;
802 Time=time(NULL); /* Time */
803 l2n(Time,p);
804 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
805 /* Do the message type and length last */
806 d=p= &(buf[4]);
807
808 *(p++)=s->version>>8;
809 *(p++)=s->version&0xff;
810
811 /* Random stuff */
812 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
813 p+=SSL3_RANDOM_SIZE;
814
815 /* now in theory we have 3 options to sending back the
816 * session id. If it is a re-use, we send back the
817 * old session-id, if it is a new session, we send
818 * back the new session-id or we send back a 0 length
819 * session-id if we want it to be single use.
820 * Currently I will not implement the '0' length session-id
821 * 12-Jan-98 - I'll now support the '0' length stuff.
822 */
823 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
824 s->session->session_id_length=0;
825
826 sl=s->session->session_id_length;
827 *(p++)=sl;
828 memcpy(p,s->session->session_id,sl);
829 p+=sl;
830
831 /* put the cipher */
832 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
833 p+=i;
834
835 /* put the compression method */
836 *(p++)=0;
837
838 /* do the header */
839 l=(p-d);
840 d=buf;
841 *(d++)=SSL3_MT_SERVER_HELLO;
842 l2n3(l,d);
843
844 s->state=SSL3_ST_CW_CLNT_HELLO_B;
845 /* number of bytes to write */
846 s->init_num=p-buf;
847 s->init_off=0;
848 }
849
850 /* SSL3_ST_CW_CLNT_HELLO_B */
851 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
852 }
853
854static int ssl3_send_server_done(s)
855SSL *s;
856 {
857 unsigned char *p;
858
859 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
860 {
861 p=(unsigned char *)s->init_buf->data;
862
863 /* do the header */
864 *(p++)=SSL3_MT_SERVER_DONE;
865 *(p++)=0;
866 *(p++)=0;
867 *(p++)=0;
868
869 s->state=SSL3_ST_SW_SRVR_DONE_B;
870 /* number of bytes to write */
871 s->init_num=4;
872 s->init_off=0;
873 }
874
875 /* SSL3_ST_CW_CLNT_HELLO_B */
876 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
877 }
878
879static int ssl3_send_server_key_exchange(s)
880SSL *s;
881 {
882#ifndef NO_RSA
883 unsigned char *q;
884 int j,num;
885 RSA *rsa;
886 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
887#endif
888#ifndef NO_DH
889 DH *dh,*dhp;
890#endif
891 EVP_PKEY *pkey;
892 unsigned char *p,*d;
893 int al,i;
894 unsigned long type;
895 int n;
896 CERT *cert;
897 BIGNUM *r[4];
898 int nr[4],kn;
899 BUF_MEM *buf;
900 EVP_MD_CTX md_ctx;
901
902 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
903 {
904 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
905 cert=s->session->cert;
906
907 buf=s->init_buf;
908
909 r[0]=r[1]=r[2]=r[3]=NULL;
910 n=0;
911#ifndef NO_RSA
912 if (type & SSL_kRSA)
913 {
914 rsa=cert->rsa_tmp;
915 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
916 {
917 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
918 (s->s3->tmp.new_cipher->algorithms|
919 SSL_NOT_EXP)?0:1);
920 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
921 cert->rsa_tmp=rsa;
922 }
923 if (rsa == NULL)
924 {
925 al=SSL_AD_HANDSHAKE_FAILURE;
926 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
927 goto f_err;
928 }
929 r[0]=rsa->n;
930 r[1]=rsa->e;
931 s->s3->tmp.use_rsa_tmp=1;
932 }
933 else
934#endif
935#ifndef NO_DH
936 if (type & SSL_kEDH)
937 {
938 dhp=cert->dh_tmp;
939 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
940 dhp=cert->dh_tmp_cb(s,
941 (s->s3->tmp.new_cipher->algorithms|
942 SSL_NOT_EXP)?0:1);
943 if (dhp == NULL)
944 {
945 al=SSL_AD_HANDSHAKE_FAILURE;
946 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
947 goto f_err;
948 }
949 if ((dh=DHparams_dup(dhp)) == NULL)
950 {
951 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
952 goto err;
953 }
954
955 s->s3->tmp.dh=dh;
956 if (((dhp->pub_key == NULL) ||
957 (dhp->priv_key == NULL) ||
958 (s->options & SSL_OP_SINGLE_DH_USE)) &&
959 (!DH_generate_key(dh)))
960 {
961 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
962 goto err;
963 }
964 else
965 {
966 dh->pub_key=BN_dup(dhp->pub_key);
967 dh->priv_key=BN_dup(dhp->priv_key);
968 if ((dh->pub_key == NULL) ||
969 (dh->priv_key == NULL))
970 {
971 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
972 goto err;
973 }
974 }
975 r[0]=dh->p;
976 r[1]=dh->g;
977 r[2]=dh->pub_key;
978 }
979 else
980#endif
981 {
982 al=SSL_AD_HANDSHAKE_FAILURE;
983 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
984 goto f_err;
985 }
986 for (i=0; r[i] != NULL; i++)
987 {
988 nr[i]=BN_num_bytes(r[i]);
989 n+=2+nr[i];
990 }
991
992 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
993 {
994 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
995 == NULL)
996 {
997 al=SSL_AD_DECODE_ERROR;
998 goto f_err;
999 }
1000 kn=EVP_PKEY_size(pkey);
1001 }
1002 else
1003 {
1004 pkey=NULL;
1005 kn=0;
1006 }
1007
1008 if (!BUF_MEM_grow(buf,n+4+kn))
1009 {
1010 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1011 goto err;
1012 }
1013 d=(unsigned char *)s->init_buf->data;
1014 p= &(d[4]);
1015
1016 for (i=0; r[i] != NULL; i++)
1017 {
1018 s2n(nr[i],p);
1019 BN_bn2bin(r[i],p);
1020 p+=nr[i];
1021 }
1022
1023 /* not anonymous */
1024 if (pkey != NULL)
1025 {
1026 /* n is the length of the params, they start at &(d[4])
1027 * and p points to the space at the end. */
1028#ifndef NO_RSA
1029 if (pkey->type == EVP_PKEY_RSA)
1030 {
1031 q=md_buf;
1032 j=0;
1033 for (num=2; num > 0; num--)
1034 {
1035 EVP_DigestInit(&md_ctx,(num == 2)
1036 ?s->ctx->md5:s->ctx->sha1);
1037 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1038 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1039 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1040 EVP_DigestFinal(&md_ctx,q,
1041 (unsigned int *)&i);
1042 q+=i;
1043 j+=i;
1044 }
1045 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1046 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1047 if (i <= 0)
1048 {
1049 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1050 goto err;
1051 }
1052 s2n(i,p);
1053 n+=i+2;
1054 }
1055 else
1056#endif
1057#if !defined(NO_DSA)
1058 if (pkey->type == EVP_PKEY_DSA)
1059 {
1060 /* lets do DSS */
1061 EVP_SignInit(&md_ctx,EVP_dss1());
1062 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1064 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1065 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1066 (unsigned int *)&i,pkey))
1067 {
1068 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1069 goto err;
1070 }
1071 s2n(i,p);
1072 n+=i+2;
1073 }
1074 else
1075#endif
1076 {
1077 /* Is this error check actually needed? */
1078 al=SSL_AD_HANDSHAKE_FAILURE;
1079 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1080 goto f_err;
1081 }
1082 }
1083
1084 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1085 l2n3(n,d);
1086
1087 /* we should now have things packed up, so lets send
1088 * it off */
1089 s->init_num=n+4;
1090 s->init_off=0;
1091 }
1092
1093 /* SSL3_ST_SW_KEY_EXCH_B */
1094 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1095f_err:
1096 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1097err:
1098 return(-1);
1099 }
1100
1101static int ssl3_send_certificate_request(s)
1102SSL *s;
1103 {
1104 unsigned char *p,*d;
1105 int i,j,nl,off,n;
1106 STACK *sk=NULL;
1107 X509_NAME *name;
1108 BUF_MEM *buf;
1109
1110 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1111 {
1112 buf=s->init_buf;
1113
1114 d=p=(unsigned char *)&(buf->data[4]);
1115
1116 /* get the list of acceptable cert types */
1117 p++;
1118 n=ssl3_get_req_cert_type(s,p);
1119 d[0]=n;
1120 p+=n;
1121 n++;
1122
1123 off=n;
1124 p+=2;
1125 n+=2;
1126
1127 sk=SSL_get_client_CA_list(s);
1128 nl=0;
1129 if (sk != NULL)
1130 {
1131 for (i=0; i<sk_num(sk); i++)
1132 {
1133 name=(X509_NAME *)sk_value(sk,i);
1134 j=i2d_X509_NAME(name,NULL);
1135 if (!BUF_MEM_grow(buf,4+n+j+2))
1136 {
1137 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1138 goto err;
1139 }
1140 p=(unsigned char *)&(buf->data[4+n]);
1141 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1142 {
1143 s2n(j,p);
1144 i2d_X509_NAME(name,&p);
1145 n+=2+j;
1146 nl+=2+j;
1147 }
1148 else
1149 {
1150 d=p;
1151 i2d_X509_NAME(name,&p);
1152 j-=2; s2n(j,d); j+=2;
1153 n+=j;
1154 nl+=j;
1155 }
1156 }
1157 }
1158 /* else no CA names */
1159 p=(unsigned char *)&(buf->data[4+off]);
1160 s2n(nl,p);
1161
1162 d=(unsigned char *)buf->data;
1163 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1164 l2n3(n,d);
1165
1166 /* we should now have things packed up, so lets send
1167 * it off */
1168
1169 s->init_num=n+4;
1170 s->init_off=0;
1171 }
1172
1173 /* SSL3_ST_SW_CERT_REQ_B */
1174 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1175err:
1176 return(-1);
1177 }
1178
1179static int ssl3_get_client_key_exchange(s)
1180SSL *s;
1181 {
1182 int i,al,ok;
1183 long n;
1184 unsigned long l;
1185 unsigned char *p;
1186 RSA *rsa=NULL;
1187 EVP_PKEY *pkey=NULL;
1188#ifndef NO_DH
1189 BIGNUM *pub=NULL;
1190 DH *dh_srvr;
1191#endif
1192
1193 n=ssl3_get_message(s,
1194 SSL3_ST_SR_KEY_EXCH_A,
1195 SSL3_ST_SR_KEY_EXCH_B,
1196 SSL3_MT_CLIENT_KEY_EXCHANGE,
1197 400, /* ???? */
1198 &ok);
1199
1200 if (!ok) return((int)n);
1201 p=(unsigned char *)s->init_buf->data;
1202
1203 l=s->s3->tmp.new_cipher->algorithms;
1204
1205#ifndef NO_RSA
1206 if (l & SSL_kRSA)
1207 {
1208 /* FIX THIS UP EAY EAY EAY EAY */
1209 if (s->s3->tmp.use_rsa_tmp)
1210 {
1211 if ((s->session->cert != NULL) &&
1212 (s->session->cert->rsa_tmp != NULL))
1213 rsa=s->session->cert->rsa_tmp;
1214 else if ((s->ctx->default_cert != NULL) &&
1215 (s->ctx->default_cert->rsa_tmp != NULL))
1216 rsa=s->ctx->default_cert->rsa_tmp;
1217 /* Don't do a callback because rsa_tmp should
1218 * be sent already */
1219 if (rsa == NULL)
1220 {
1221 al=SSL_AD_HANDSHAKE_FAILURE;
1222 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1223 goto f_err;
1224
1225 }
1226 }
1227 else
1228 {
1229 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1230 if ( (pkey == NULL) ||
1231 (pkey->type != EVP_PKEY_RSA) ||
1232 (pkey->pkey.rsa == NULL))
1233 {
1234 al=SSL_AD_HANDSHAKE_FAILURE;
1235 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1236 goto f_err;
1237 }
1238 rsa=pkey->pkey.rsa;
1239 }
1240
1241 /* TLS */
1242 if (s->version > SSL3_VERSION)
1243 {
1244 n2s(p,i);
1245 if (n != i+2)
1246 {
1247 if (!(s->options & SSL_OP_TLS_D5_BUG))
1248 {
1249 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1250 goto err;
1251 }
1252 else
1253 p-=2;
1254 }
1255 else
1256 n=i;
1257 }
1258
1259 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1260
1261#if 1
1262 /* If a bad decrypt, use a dud master key */
1263 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1264 ((p[0] != (s->version>>8)) ||
1265 (p[1] != (s->version & 0xff))))
1266 {
1267 p[0]=(s->version>>8);
1268 p[1]=(s->version & 0xff);
1269 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1270 i=SSL_MAX_MASTER_KEY_LENGTH;
1271 }
1272#else
1273 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1274 {
1275 al=SSL_AD_DECODE_ERROR;
1276 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1277 goto f_err;
1278 }
1279
1280 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1281 {
1282 al=SSL_AD_DECODE_ERROR;
1283 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1284 goto f_err;
1285 }
1286#endif
1287
1288 s->session->master_key_length=
1289 s->method->ssl3_enc->generate_master_secret(s,
1290 s->session->master_key,
1291 p,i);
1292 memset(p,0,i);
1293 }
1294 else
1295#endif
1296#ifndef NO_DH
1297 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1298 {
1299 n2s(p,i);
1300 if (n != i+2)
1301 {
1302 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1303 {
1304 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1305 goto err;
1306 }
1307 else
1308 {
1309 p-=2;
1310 i=(int)n;
1311 }
1312 }
1313
1314 if (n == 0L) /* the parameters are in the cert */
1315 {
1316 al=SSL_AD_HANDSHAKE_FAILURE;
1317 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1318 goto f_err;
1319 }
1320 else
1321 {
1322 if (s->s3->tmp.dh == NULL)
1323 {
1324 al=SSL_AD_HANDSHAKE_FAILURE;
1325 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1326 goto f_err;
1327 }
1328 else
1329 dh_srvr=s->s3->tmp.dh;
1330 }
1331
1332 pub=BN_bin2bn(p,i,NULL);
1333 if (pub == NULL)
1334 {
1335 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1336 goto err;
1337 }
1338
1339 i=DH_compute_key(p,pub,dh_srvr);
1340
1341 if (i <= 0)
1342 {
1343 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1344 goto err;
1345 }
1346
1347 DH_free(s->s3->tmp.dh);
1348 s->s3->tmp.dh=NULL;
1349
1350 BN_clear_free(pub);
1351 pub=NULL;
1352 s->session->master_key_length=
1353 s->method->ssl3_enc->generate_master_secret(s,
1354 s->session->master_key,p,i);
1355 }
1356 else
1357#endif
1358 {
1359 al=SSL_AD_HANDSHAKE_FAILURE;
1360 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1361 goto f_err;
1362 }
1363
1364 return(1);
1365f_err:
1366 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1367#if !defined(NO_DH) || !defined(NO_RSA)
1368err:
1369#endif
1370 return(-1);
1371 }
1372
1373static int ssl3_get_cert_verify(s)
1374SSL *s;
1375 {
1376 EVP_PKEY *pkey=NULL;
1377 unsigned char *p;
1378 int al,ok,ret=0;
1379 long n;
1380 int type=0,i,j;
1381 X509 *peer;
1382
1383 n=ssl3_get_message(s,
1384 SSL3_ST_SR_CERT_VRFY_A,
1385 SSL3_ST_SR_CERT_VRFY_B,
1386 -1,
1387 512, /* 512? */
1388 &ok);
1389
1390 if (!ok) return((int)n);
1391
1392 if (s->session->peer != NULL)
1393 {
1394 peer=s->session->peer;
1395 pkey=X509_get_pubkey(peer);
1396 type=X509_certificate_type(peer,pkey);
1397 }
1398 else
1399 {
1400 peer=NULL;
1401 pkey=NULL;
1402 }
1403
1404 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1405 {
1406 s->s3->tmp.reuse_message=1;
1407 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1408 {
1409 al=SSL_AD_UNEXPECTED_MESSAGE;
1410 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1411 goto f_err;
1412 }
1413 ret=1;
1414 goto end;
1415 }
1416
1417 if (peer == NULL)
1418 {
1419 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1420 al=SSL_AD_UNEXPECTED_MESSAGE;
1421 goto f_err;
1422 }
1423
1424 if (!(type & EVP_PKT_SIGN))
1425 {
1426 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1427 al=SSL_AD_ILLEGAL_PARAMETER;
1428 goto f_err;
1429 }
1430
1431 if (s->s3->change_cipher_spec)
1432 {
1433 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1434 al=SSL_AD_UNEXPECTED_MESSAGE;
1435 goto f_err;
1436 }
1437
1438 /* we now have a signature that we need to verify */
1439 p=(unsigned char *)s->init_buf->data;
1440 n2s(p,i);
1441 n-=2;
1442 if (i > n)
1443 {
1444 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1445 al=SSL_AD_DECODE_ERROR;
1446 goto f_err;
1447 }
1448
1449 j=EVP_PKEY_size(pkey);
1450 if ((i > j) || (n > j) || (n <= 0))
1451 {
1452 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1453 al=SSL_AD_DECODE_ERROR;
1454 goto f_err;
1455 }
1456
1457#ifndef NO_RSA
1458 if (pkey->type == EVP_PKEY_RSA)
1459 {
1460 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1461 if (i < 0)
1462 {
1463 al=SSL_AD_DECRYPT_ERROR;
1464 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1465 goto f_err;
1466 }
1467 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1468 memcmp(&(s->s3->tmp.finish_md[0]),p,
1469 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1470 {
1471 al=SSL_AD_DECRYPT_ERROR;
1472 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1473 goto f_err;
1474 }
1475 }
1476 else
1477#endif
1478#ifndef NO_DSA
1479 if (pkey->type == EVP_PKEY_DSA)
1480 {
1481 j=DSA_verify(pkey->save_type,
1482 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1483 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1484 if (j <= 0)
1485 {
1486 /* bad signature */
1487 al=SSL_AD_DECRYPT_ERROR;
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1489 goto f_err;
1490 }
1491 }
1492 else
1493#endif
1494 {
1495 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1496 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1497 goto f_err;
1498 }
1499
1500
1501 ret=1;
1502 if (0)
1503 {
1504f_err:
1505 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1506 }
1507end:
1508 return(ret);
1509 }
1510
1511static int ssl3_get_client_certificate(s)
1512SSL *s;
1513 {
1514 int i,ok,al,ret= -1;
1515 X509 *x=NULL;
1516 unsigned long l,nc,llen,n;
1517 unsigned char *p,*d,*q;
1518 STACK *sk=NULL;
1519
1520 n=ssl3_get_message(s,
1521 SSL3_ST_SR_CERT_A,
1522 SSL3_ST_SR_CERT_B,
1523 -1,
1524#if defined(MSDOS) && !defined(WIN32)
1525 1024*30, /* 30k max cert list :-) */
1526#else
1527 1024*100, /* 100k max cert list :-) */
1528#endif
1529 &ok);
1530
1531 if (!ok) return((int)n);
1532
1533 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1534 {
1535 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1536 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1537 {
1538 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1539 al=SSL_AD_HANDSHAKE_FAILURE;
1540 goto f_err;
1541 }
1542 /* If tls asked for a client cert we must return a 0 list */
1543 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1544 {
1545 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1546 al=SSL_AD_UNEXPECTED_MESSAGE;
1547 goto f_err;
1548 }
1549 s->s3->tmp.reuse_message=1;
1550 return(1);
1551 }
1552
1553 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1554 {
1555 al=SSL_AD_UNEXPECTED_MESSAGE;
1556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1557 goto f_err;
1558 }
1559 d=p=(unsigned char *)s->init_buf->data;
1560
1561 if ((sk=sk_new_null()) == NULL)
1562 {
1563 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1564 goto err;
1565 }
1566
1567 n2l3(p,llen);
1568 if (llen+3 != n)
1569 {
1570 al=SSL_AD_DECODE_ERROR;
1571 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1572 goto f_err;
1573 }
1574 for (nc=0; nc<llen; )
1575 {
1576 n2l3(p,l);
1577 if ((l+nc+3) > llen)
1578 {
1579 al=SSL_AD_DECODE_ERROR;
1580 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1581 goto f_err;
1582 }
1583
1584 q=p;
1585 x=d2i_X509(NULL,&p,l);
1586 if (x == NULL)
1587 {
1588 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1589 goto err;
1590 }
1591 if (p != (q+l))
1592 {
1593 al=SSL_AD_DECODE_ERROR;
1594 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1595 goto f_err;
1596 }
1597 if (!sk_push(sk,(char *)x))
1598 {
1599 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1600 goto err;
1601 }
1602 x=NULL;
1603 nc+=l+3;
1604 }
1605
1606 if (sk_num(sk) <= 0)
1607 {
1608 /* TLS does not mind 0 certs returned */
1609 if (s->version == SSL3_VERSION)
1610 {
1611 al=SSL_AD_HANDSHAKE_FAILURE;
1612 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1613 goto f_err;
1614 }
1615 /* Fail for TLS only if we required a certificate */
1616 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1617 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1618 {
1619 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1620 al=SSL_AD_HANDSHAKE_FAILURE;
1621 goto f_err;
1622 }
1623 }
1624 else
1625 {
1626 i=ssl_verify_cert_chain(s,sk);
1627 if (!i)
1628 {
1629 al=ssl_verify_alarm_type(s->verify_result);
1630 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1631 goto f_err;
1632 }
1633 }
1634
1635 /* This should not be needed */
1636 if (s->session->peer != NULL)
1637 X509_free(s->session->peer);
1638 s->session->peer=(X509 *)sk_shift(sk);
1639
1640 ret=1;
1641 if (0)
1642 {
1643f_err:
1644 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1645 }
1646err:
1647 if (x != NULL) X509_free(x);
1648 if (sk != NULL) sk_pop_free(sk,X509_free);
1649 return(ret);
1650 }
1651
1652int ssl3_send_server_certificate(s)
1653SSL *s;
1654 {
1655 unsigned long l;
1656 X509 *x;
1657
1658 if (s->state == SSL3_ST_SW_CERT_A)
1659 {
1660 x=ssl_get_server_send_cert(s);
1661 if (x == NULL)
1662 {
1663 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1664 return(0);
1665 }
1666
1667 l=ssl3_output_cert_chain(s,x);
1668 s->state=SSL3_ST_SW_CERT_B;
1669 s->init_num=(int)l;
1670 s->init_off=0;
1671 }
1672
1673 /* SSL3_ST_SW_CERT_B */
1674 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1675 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 13:40:19 +0000