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-rw-r--r--src/lib/libssl/s3_srvr.c1683
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diff --git a/src/lib/libssl/s3_srvr.c b/src/lib/libssl/s3_srvr.c
deleted file mode 100644
index e003d88357..0000000000
--- a/src/lib/libssl/s3_srvr.c
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@@ -1,1683 +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
61#include <stdio.h>
62#include <openssl/buffer.h>
63#include <openssl/rand.h>
64#include <openssl/objects.h>
65#include <openssl/md5.h>
66#include <openssl/sha.h>
67#include <openssl/evp.h>
68#include <openssl/x509.h>
69#include "ssl_locl.h"
70
71static SSL_METHOD *ssl3_get_server_method(int ver);
72static int ssl3_get_client_hello(SSL *s);
73static int ssl3_send_server_hello(SSL *s);
74static int ssl3_send_server_key_exchange(SSL *s);
75static int ssl3_send_certificate_request(SSL *s);
76static int ssl3_send_server_done(SSL *s);
77static int ssl3_get_cert_verify(SSL *s);
78static int ssl3_get_client_key_exchange(SSL *s);
79static int ssl3_get_client_certificate(SSL *s);
80static int ssl3_send_hello_request(SSL *s);
81
82static SSL_METHOD *ssl3_get_server_method(int ver)
83 {
84 if (ver == SSL3_VERSION)
85 return(SSLv3_server_method());
86 else
87 return(NULL);
88 }
89
90SSL_METHOD *SSLv3_server_method(void)
91 {
92 static int init=1;
93 static SSL_METHOD SSLv3_server_data;
94
95 if (init)
96 {
97 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
98 sizeof(SSL_METHOD));
99 SSLv3_server_data.ssl_accept=ssl3_accept;
100 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
101 init=0;
102 }
103 return(&SSLv3_server_data);
104 }
105
106int ssl3_accept(SSL *s)
107 {
108 BUF_MEM *buf;
109 unsigned long l,Time=time(NULL);
110 void (*cb)()=NULL;
111 long num1;
112 int ret= -1;
113 int new_state,state,skip=0;
114
115 RAND_seed(&Time,sizeof(Time));
116 ERR_clear_error();
117 clear_sys_error();
118
119 if (s->info_callback != NULL)
120 cb=s->info_callback;
121 else if (s->ctx->info_callback != NULL)
122 cb=s->ctx->info_callback;
123
124 /* init things to blank */
125 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
126 s->in_handshake++;
127
128 if (s->cert == NULL)
129 {
130 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
131 return(-1);
132 }
133
134 for (;;)
135 {
136 state=s->state;
137
138 switch (s->state)
139 {
140 case SSL_ST_RENEGOTIATE:
141 s->new_session=1;
142 /* s->state=SSL_ST_ACCEPT; */
143
144 case SSL_ST_BEFORE:
145 case SSL_ST_ACCEPT:
146 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
147 case SSL_ST_OK|SSL_ST_ACCEPT:
148
149 s->server=1;
150 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
151
152 if ((s->version>>8) != 3)
153 abort();
154 /* s->version=SSL3_VERSION; */
155 s->type=SSL_ST_ACCEPT;
156
157 if (s->init_buf == NULL)
158 {
159 if ((buf=BUF_MEM_new()) == NULL)
160 {
161 ret= -1;
162 goto end;
163 }
164 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
165 {
166 ret= -1;
167 goto end;
168 }
169 s->init_buf=buf;
170 }
171
172 if (!ssl3_setup_buffers(s))
173 {
174 ret= -1;
175 goto end;
176 }
177
178 /* Ok, we now need to push on a buffering BIO so that
179 * the output is sent in a way that TCP likes :-)
180 */
181 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
182
183 s->init_num=0;
184
185 if (s->state != SSL_ST_RENEGOTIATE)
186 {
187 s->state=SSL3_ST_SR_CLNT_HELLO_A;
188 ssl3_init_finished_mac(s);
189 s->ctx->stats.sess_accept++;
190 }
191 else
192 {
193 s->ctx->stats.sess_accept_renegotiate++;
194 s->state=SSL3_ST_SW_HELLO_REQ_A;
195 }
196 break;
197
198 case SSL3_ST_SW_HELLO_REQ_A:
199 case SSL3_ST_SW_HELLO_REQ_B:
200
201 s->shutdown=0;
202 ret=ssl3_send_hello_request(s);
203 if (ret <= 0) goto end;
204 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
205 s->state=SSL3_ST_SW_FLUSH;
206 s->init_num=0;
207
208 ssl3_init_finished_mac(s);
209 break;
210
211 case SSL3_ST_SW_HELLO_REQ_C:
212 s->state=SSL_ST_OK;
213 ret=1;
214 goto end;
215 /* break; */
216
217 case SSL3_ST_SR_CLNT_HELLO_A:
218 case SSL3_ST_SR_CLNT_HELLO_B:
219 case SSL3_ST_SR_CLNT_HELLO_C:
220
221 s->shutdown=0;
222 ret=ssl3_get_client_hello(s);
223 if (ret <= 0) goto end;
224 s->state=SSL3_ST_SW_SRVR_HELLO_A;
225 s->init_num=0;
226 break;
227
228 case SSL3_ST_SW_SRVR_HELLO_A:
229 case SSL3_ST_SW_SRVR_HELLO_B:
230 ret=ssl3_send_server_hello(s);
231 if (ret <= 0) goto end;
232
233 if (s->hit)
234 s->state=SSL3_ST_SW_CHANGE_A;
235 else
236 s->state=SSL3_ST_SW_CERT_A;
237 s->init_num=0;
238 break;
239
240 case SSL3_ST_SW_CERT_A:
241 case SSL3_ST_SW_CERT_B:
242 /* Check if it is anon DH */
243 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
244 {
245 ret=ssl3_send_server_certificate(s);
246 if (ret <= 0) goto end;
247 }
248 else
249 skip=1;
250 s->state=SSL3_ST_SW_KEY_EXCH_A;
251 s->init_num=0;
252 break;
253
254 case SSL3_ST_SW_KEY_EXCH_A:
255 case SSL3_ST_SW_KEY_EXCH_B:
256 l=s->s3->tmp.new_cipher->algorithms;
257
258 /* clear this, it may get reset by
259 * send_server_key_exchange */
260 if (s->options & SSL_OP_EPHEMERAL_RSA)
261 s->s3->tmp.use_rsa_tmp=1;
262 else
263 s->s3->tmp.use_rsa_tmp=0;
264
265 /* only send if a DH key exchange, fortezza or
266 * RSA but we have a sign only certificate */
267 if (s->s3->tmp.use_rsa_tmp
268 || (l & (SSL_DH|SSL_kFZA))
269 || ((l & SSL_kRSA)
270 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
271 || (SSL_IS_EXPORT(l)
272 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
273 )
274 )
275 )
276 )
277 {
278 ret=ssl3_send_server_key_exchange(s);
279 if (ret <= 0) goto end;
280 }
281 else
282 skip=1;
283
284 s->state=SSL3_ST_SW_CERT_REQ_A;
285 s->init_num=0;
286 break;
287
288 case SSL3_ST_SW_CERT_REQ_A:
289 case SSL3_ST_SW_CERT_REQ_B:
290 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
291 ((s->session->peer != NULL) &&
292 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
293 {
294 /* no cert request */
295 skip=1;
296 s->s3->tmp.cert_request=0;
297 s->state=SSL3_ST_SW_SRVR_DONE_A;
298 }
299 else
300 {
301 s->s3->tmp.cert_request=1;
302 ret=ssl3_send_certificate_request(s);
303 if (ret <= 0) goto end;
304 s->state=SSL3_ST_SW_SRVR_DONE_A;
305 s->init_num=0;
306 }
307 break;
308
309 case SSL3_ST_SW_SRVR_DONE_A:
310 case SSL3_ST_SW_SRVR_DONE_B:
311 ret=ssl3_send_server_done(s);
312 if (ret <= 0) goto end;
313 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
314 s->state=SSL3_ST_SW_FLUSH;
315 s->init_num=0;
316 break;
317
318 case SSL3_ST_SW_FLUSH:
319 /* number of bytes to be flushed */
320 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
321 if (num1 > 0)
322 {
323 s->rwstate=SSL_WRITING;
324 num1=BIO_flush(s->wbio);
325 if (num1 <= 0) { ret= -1; goto end; }
326 s->rwstate=SSL_NOTHING;
327 }
328
329 s->state=s->s3->tmp.next_state;
330 break;
331
332 case SSL3_ST_SR_CERT_A:
333 case SSL3_ST_SR_CERT_B:
334 /* could be sent for a DH cert, even if we
335 * have not asked for it :-) */
336 ret=ssl3_get_client_certificate(s);
337 if (ret <= 0) goto end;
338 s->init_num=0;
339 s->state=SSL3_ST_SR_KEY_EXCH_A;
340 break;
341
342 case SSL3_ST_SR_KEY_EXCH_A:
343 case SSL3_ST_SR_KEY_EXCH_B:
344 ret=ssl3_get_client_key_exchange(s);
345 if (ret <= 0) goto end;
346 s->state=SSL3_ST_SR_CERT_VRFY_A;
347 s->init_num=0;
348
349 /* We need to get hashes here so if there is
350 * a client cert, it can be verified */
351 s->method->ssl3_enc->cert_verify_mac(s,
352 &(s->s3->finish_dgst1),
353 &(s->s3->tmp.finish_md[0]));
354 s->method->ssl3_enc->cert_verify_mac(s,
355 &(s->s3->finish_dgst2),
356 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
357
358 break;
359
360 case SSL3_ST_SR_CERT_VRFY_A:
361 case SSL3_ST_SR_CERT_VRFY_B:
362
363 /* we should decide if we expected this one */
364 ret=ssl3_get_cert_verify(s);
365 if (ret <= 0) goto end;
366
367 s->state=SSL3_ST_SR_FINISHED_A;
368 s->init_num=0;
369 break;
370
371 case SSL3_ST_SR_FINISHED_A:
372 case SSL3_ST_SR_FINISHED_B:
373 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
374 SSL3_ST_SR_FINISHED_B);
375 if (ret <= 0) goto end;
376 if (s->hit)
377 s->state=SSL_ST_OK;
378 else
379 s->state=SSL3_ST_SW_CHANGE_A;
380 s->init_num=0;
381 break;
382
383 case SSL3_ST_SW_CHANGE_A:
384 case SSL3_ST_SW_CHANGE_B:
385
386 s->session->cipher=s->s3->tmp.new_cipher;
387 if (!s->method->ssl3_enc->setup_key_block(s))
388 { ret= -1; goto end; }
389
390 ret=ssl3_send_change_cipher_spec(s,
391 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
392
393 if (ret <= 0) goto end;
394 s->state=SSL3_ST_SW_FINISHED_A;
395 s->init_num=0;
396
397 if (!s->method->ssl3_enc->change_cipher_state(s,
398 SSL3_CHANGE_CIPHER_SERVER_WRITE))
399 {
400 ret= -1;
401 goto end;
402 }
403
404 break;
405
406 case SSL3_ST_SW_FINISHED_A:
407 case SSL3_ST_SW_FINISHED_B:
408 ret=ssl3_send_finished(s,
409 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
410 s->method->ssl3_enc->server_finished,
411 s->method->ssl3_enc->server_finished_len);
412 if (ret <= 0) goto end;
413 s->state=SSL3_ST_SW_FLUSH;
414 if (s->hit)
415 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
416 else
417 s->s3->tmp.next_state=SSL_ST_OK;
418 s->init_num=0;
419 break;
420
421 case SSL_ST_OK:
422 /* clean a few things up */
423 ssl3_cleanup_key_block(s);
424
425 BUF_MEM_free(s->init_buf);
426 s->init_buf=NULL;
427
428 /* remove buffering on output */
429 ssl_free_wbio_buffer(s);
430
431 s->new_session=0;
432 s->init_num=0;
433
434 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
435
436 s->ctx->stats.sess_accept_good++;
437 /* s->server=1; */
438 s->handshake_func=ssl3_accept;
439 ret=1;
440
441 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
442
443 goto end;
444 /* break; */
445
446 default:
447 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
448 ret= -1;
449 goto end;
450 /* break; */
451 }
452
453 if (!s->s3->tmp.reuse_message && !skip)
454 {
455 if (s->debug)
456 {
457 if ((ret=BIO_flush(s->wbio)) <= 0)
458 goto end;
459 }
460
461
462 if ((cb != NULL) && (s->state != state))
463 {
464 new_state=s->state;
465 s->state=state;
466 cb(s,SSL_CB_ACCEPT_LOOP,1);
467 s->state=new_state;
468 }
469 }
470 skip=0;
471 }
472end:
473 /* BIO_flush(s->wbio); */
474
475 if (cb != NULL)
476 cb(s,SSL_CB_ACCEPT_EXIT,ret);
477 s->in_handshake--;
478 return(ret);
479 }
480
481static int ssl3_send_hello_request(SSL *s)
482 {
483 unsigned char *p;
484
485 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
486 {
487 p=(unsigned char *)s->init_buf->data;
488 *(p++)=SSL3_MT_CLIENT_REQUEST;
489 *(p++)=0;
490 *(p++)=0;
491 *(p++)=0;
492
493 s->state=SSL3_ST_SW_HELLO_REQ_B;
494 /* number of bytes to write */
495 s->init_num=4;
496 s->init_off=0;
497 }
498
499 /* SSL3_ST_SW_HELLO_REQ_B */
500 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
501 }
502
503static int ssl3_get_client_hello(SSL *s)
504 {
505 int i,j,ok,al,ret= -1;
506 long n;
507 unsigned long id;
508 unsigned char *p,*d,*q;
509 SSL_CIPHER *c;
510 SSL_COMP *comp=NULL;
511 STACK_OF(SSL_CIPHER) *ciphers=NULL;
512
513 /* We do this so that we will respond with our native type.
514 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
515 * This down switching should be handled by a different method.
516 * If we are SSLv3, we will respond with SSLv3, even if prompted with
517 * TLSv1.
518 */
519 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
520 {
521 s->first_packet=1;
522 s->state=SSL3_ST_SR_CLNT_HELLO_B;
523 }
524 n=ssl3_get_message(s,
525 SSL3_ST_SR_CLNT_HELLO_B,
526 SSL3_ST_SR_CLNT_HELLO_C,
527 SSL3_MT_CLIENT_HELLO,
528 SSL3_RT_MAX_PLAIN_LENGTH,
529 &ok);
530
531 if (!ok) return((int)n);
532 d=p=(unsigned char *)s->init_buf->data;
533
534 /* The version number has already been checked in ssl3_get_message.
535 * I a native TLSv1/SSLv3 method, the match must be correct except
536 * perhaps for the first message */
537/* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
538 p+=2;
539
540 /* load the client random */
541 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
542 p+=SSL3_RANDOM_SIZE;
543
544 /* get the session-id */
545 j= *(p++);
546
547 s->hit=0;
548 if (j == 0)
549 {
550 if (!ssl_get_new_session(s,1))
551 goto err;
552 }
553 else
554 {
555 i=ssl_get_prev_session(s,p,j);
556 if (i == 1)
557 { /* previous session */
558 s->hit=1;
559 }
560 else if (i == -1)
561 goto err;
562 else /* i == 0 */
563 {
564 if (!ssl_get_new_session(s,1))
565 goto err;
566 }
567 }
568
569 p+=j;
570 n2s(p,i);
571 if ((i == 0) && (j != 0))
572 {
573 /* we need a cipher if we are not resuming a session */
574 al=SSL_AD_ILLEGAL_PARAMETER;
575 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
576 goto f_err;
577 }
578 if ((i+p) > (d+n))
579 {
580 /* not enough data */
581 al=SSL_AD_DECODE_ERROR;
582 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
583 goto f_err;
584 }
585 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
586 == NULL))
587 {
588 goto err;
589 }
590 p+=i;
591
592 /* If it is a hit, check that the cipher is in the list */
593 if ((s->hit) && (i > 0))
594 {
595 j=0;
596 id=s->session->cipher->id;
597
598#ifdef CIPHER_DEBUG
599 printf("client sent %d ciphers\n",sk_num(ciphers));
600#endif
601 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
602 {
603 c=sk_SSL_CIPHER_value(ciphers,i);
604#ifdef CIPHER_DEBUG
605 printf("client [%2d of %2d]:%s\n",
606 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
607#endif
608 if (c->id == id)
609 {
610 j=1;
611 break;
612 }
613 }
614 if (j == 0)
615 {
616 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
617 {
618 /* Very bad for multi-threading.... */
619 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
620 0);
621 }
622 else
623 {
624 /* we need to have the cipher in the cipher
625 * list if we are asked to reuse it */
626 al=SSL_AD_ILLEGAL_PARAMETER;
627 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
628 goto f_err;
629 }
630 }
631 }
632
633 /* compression */
634 i= *(p++);
635 q=p;
636 for (j=0; j<i; j++)
637 {
638 if (p[j] == 0) break;
639 }
640
641 p+=i;
642 if (j >= i)
643 {
644 /* no compress */
645 al=SSL_AD_DECODE_ERROR;
646 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
647 goto f_err;
648 }
649
650 /* Worst case, we will use the NULL compression, but if we have other
651 * options, we will now look for them. We have i-1 compression
652 * algorithms from the client, starting at q. */
653 s->s3->tmp.new_compression=NULL;
654 if (s->ctx->comp_methods != NULL)
655 { /* See if we have a match */
656 int m,nn,o,v,done=0;
657
658 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
659 for (m=0; m<nn; m++)
660 {
661 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
662 v=comp->id;
663 for (o=0; o<i; o++)
664 {
665 if (v == q[o])
666 {
667 done=1;
668 break;
669 }
670 }
671 if (done) break;
672 }
673 if (done)
674 s->s3->tmp.new_compression=comp;
675 else
676 comp=NULL;
677 }
678
679 /* TLS does not mind if there is extra stuff */
680 if (s->version == SSL3_VERSION)
681 {
682 if (p > (d+n))
683 {
684 /* wrong number of bytes,
685 * there could be more to follow */
686 al=SSL_AD_DECODE_ERROR;
687 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
688 goto f_err;
689 }
690 }
691
692 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
693 * pick a cipher */
694
695 if (!s->hit)
696 {
697 s->session->compress_meth=(comp == NULL)?0:comp->id;
698 if (s->session->ciphers != NULL)
699 sk_SSL_CIPHER_free(s->session->ciphers);
700 s->session->ciphers=ciphers;
701 if (ciphers == NULL)
702 {
703 al=SSL_AD_ILLEGAL_PARAMETER;
704 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
705 goto f_err;
706 }
707 ciphers=NULL;
708 c=ssl3_choose_cipher(s,s->session->ciphers,
709 ssl_get_ciphers_by_id(s));
710
711 if (c == NULL)
712 {
713 al=SSL_AD_HANDSHAKE_FAILURE;
714 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
715 goto f_err;
716 }
717 s->s3->tmp.new_cipher=c;
718 }
719 else
720 {
721 /* Session-id reuse */
722#ifdef REUSE_CIPHER_BUG
723 STACK_OF(SSL_CIPHER) *sk;
724 SSL_CIPHER *nc=NULL;
725 SSL_CIPHER *ec=NULL;
726
727 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
728 {
729 sk=s->session->ciphers;
730 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
731 {
732 c=sk_SSL_CIPHER_value(sk,i);
733 if (c->algorithms & SSL_eNULL)
734 nc=c;
735 if (SSL_C_IS_EXPORT(c))
736 ec=c;
737 }
738 if (nc != NULL)
739 s->s3->tmp.new_cipher=nc;
740 else if (ec != NULL)
741 s->s3->tmp.new_cipher=ec;
742 else
743 s->s3->tmp.new_cipher=s->session->cipher;
744 }
745 else
746#endif
747 s->s3->tmp.new_cipher=s->session->cipher;
748 }
749
750 /* we now have the following setup.
751 * client_random
752 * cipher_list - our prefered list of ciphers
753 * ciphers - the clients prefered list of ciphers
754 * compression - basically ignored right now
755 * ssl version is set - sslv3
756 * s->session - The ssl session has been setup.
757 * s->hit - sesson reuse flag
758 * s->tmp.new_cipher - the new cipher to use.
759 */
760
761 ret=1;
762 if (0)
763 {
764f_err:
765 ssl3_send_alert(s,SSL3_AL_FATAL,al);
766 }
767err:
768 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
769 return(ret);
770 }
771
772static int ssl3_send_server_hello(SSL *s)
773 {
774 unsigned char *buf;
775 unsigned char *p,*d;
776 int i,sl;
777 unsigned long l,Time;
778
779 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
780 {
781 buf=(unsigned char *)s->init_buf->data;
782 p=s->s3->server_random;
783 Time=time(NULL); /* Time */
784 l2n(Time,p);
785 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
786 /* Do the message type and length last */
787 d=p= &(buf[4]);
788
789 *(p++)=s->version>>8;
790 *(p++)=s->version&0xff;
791
792 /* Random stuff */
793 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
794 p+=SSL3_RANDOM_SIZE;
795
796 /* now in theory we have 3 options to sending back the
797 * session id. If it is a re-use, we send back the
798 * old session-id, if it is a new session, we send
799 * back the new session-id or we send back a 0 length
800 * session-id if we want it to be single use.
801 * Currently I will not implement the '0' length session-id
802 * 12-Jan-98 - I'll now support the '0' length stuff.
803 */
804 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
805 s->session->session_id_length=0;
806
807 sl=s->session->session_id_length;
808 *(p++)=sl;
809 memcpy(p,s->session->session_id,sl);
810 p+=sl;
811
812 /* put the cipher */
813 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
814 p+=i;
815
816 /* put the compression method */
817 if (s->s3->tmp.new_compression == NULL)
818 *(p++)=0;
819 else
820 *(p++)=s->s3->tmp.new_compression->id;
821
822 /* do the header */
823 l=(p-d);
824 d=buf;
825 *(d++)=SSL3_MT_SERVER_HELLO;
826 l2n3(l,d);
827
828 s->state=SSL3_ST_CW_CLNT_HELLO_B;
829 /* number of bytes to write */
830 s->init_num=p-buf;
831 s->init_off=0;
832 }
833
834 /* SSL3_ST_CW_CLNT_HELLO_B */
835 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
836 }
837
838static int ssl3_send_server_done(SSL *s)
839 {
840 unsigned char *p;
841
842 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
843 {
844 p=(unsigned char *)s->init_buf->data;
845
846 /* do the header */
847 *(p++)=SSL3_MT_SERVER_DONE;
848 *(p++)=0;
849 *(p++)=0;
850 *(p++)=0;
851
852 s->state=SSL3_ST_SW_SRVR_DONE_B;
853 /* number of bytes to write */
854 s->init_num=4;
855 s->init_off=0;
856 }
857
858 /* SSL3_ST_CW_CLNT_HELLO_B */
859 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
860 }
861
862static int ssl3_send_server_key_exchange(SSL *s)
863 {
864#ifndef NO_RSA
865 unsigned char *q;
866 int j,num;
867 RSA *rsa;
868 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
869#endif
870#ifndef NO_DH
871 DH *dh,*dhp;
872#endif
873 EVP_PKEY *pkey;
874 unsigned char *p,*d;
875 int al,i;
876 unsigned long type;
877 int n;
878 CERT *cert;
879 BIGNUM *r[4];
880 int nr[4],kn;
881 BUF_MEM *buf;
882 EVP_MD_CTX md_ctx;
883
884 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
885 {
886 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
887 cert=s->cert;
888
889 buf=s->init_buf;
890
891 r[0]=r[1]=r[2]=r[3]=NULL;
892 n=0;
893#ifndef NO_RSA
894 if (type & SSL_kRSA)
895 {
896 rsa=cert->rsa_tmp;
897 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
898 {
899 rsa=s->cert->rsa_tmp_cb(s,
900 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
901 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
902 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
903 cert->rsa_tmp=rsa;
904 }
905 if (rsa == NULL)
906 {
907 al=SSL_AD_HANDSHAKE_FAILURE;
908 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
909 goto f_err;
910 }
911 r[0]=rsa->n;
912 r[1]=rsa->e;
913 s->s3->tmp.use_rsa_tmp=1;
914 }
915 else
916#endif
917#ifndef NO_DH
918 if (type & SSL_kEDH)
919 {
920 dhp=cert->dh_tmp;
921 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
922 dhp=s->cert->dh_tmp_cb(s,
923 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
924 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
925 if (dhp == NULL)
926 {
927 al=SSL_AD_HANDSHAKE_FAILURE;
928 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
929 goto f_err;
930 }
931 if ((dh=DHparams_dup(dhp)) == NULL)
932 {
933 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
934 goto err;
935 }
936
937 s->s3->tmp.dh=dh;
938 if ((dhp->pub_key == NULL ||
939 dhp->priv_key == NULL ||
940 (s->options & SSL_OP_SINGLE_DH_USE)))
941 {
942 if(!DH_generate_key(dh))
943 {
944 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
945 ERR_R_DH_LIB);
946 goto err;
947 }
948 }
949 else
950 {
951 dh->pub_key=BN_dup(dhp->pub_key);
952 dh->priv_key=BN_dup(dhp->priv_key);
953 if ((dh->pub_key == NULL) ||
954 (dh->priv_key == NULL))
955 {
956 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
957 goto err;
958 }
959 }
960 r[0]=dh->p;
961 r[1]=dh->g;
962 r[2]=dh->pub_key;
963 }
964 else
965#endif
966 {
967 al=SSL_AD_HANDSHAKE_FAILURE;
968 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
969 goto f_err;
970 }
971 for (i=0; r[i] != NULL; i++)
972 {
973 nr[i]=BN_num_bytes(r[i]);
974 n+=2+nr[i];
975 }
976
977 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
978 {
979 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
980 == NULL)
981 {
982 al=SSL_AD_DECODE_ERROR;
983 goto f_err;
984 }
985 kn=EVP_PKEY_size(pkey);
986 }
987 else
988 {
989 pkey=NULL;
990 kn=0;
991 }
992
993 if (!BUF_MEM_grow(buf,n+4+kn))
994 {
995 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
996 goto err;
997 }
998 d=(unsigned char *)s->init_buf->data;
999 p= &(d[4]);
1000
1001 for (i=0; r[i] != NULL; i++)
1002 {
1003 s2n(nr[i],p);
1004 BN_bn2bin(r[i],p);
1005 p+=nr[i];
1006 }
1007
1008 /* not anonymous */
1009 if (pkey != NULL)
1010 {
1011 /* n is the length of the params, they start at &(d[4])
1012 * and p points to the space at the end. */
1013#ifndef NO_RSA
1014 if (pkey->type == EVP_PKEY_RSA)
1015 {
1016 q=md_buf;
1017 j=0;
1018 for (num=2; num > 0; num--)
1019 {
1020 EVP_DigestInit(&md_ctx,(num == 2)
1021 ?s->ctx->md5:s->ctx->sha1);
1022 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1023 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1024 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1025 EVP_DigestFinal(&md_ctx,q,
1026 (unsigned int *)&i);
1027 q+=i;
1028 j+=i;
1029 }
1030 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1031 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1032 if (i <= 0)
1033 {
1034 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1035 goto err;
1036 }
1037 s2n(i,p);
1038 n+=i+2;
1039 }
1040 else
1041#endif
1042#if !defined(NO_DSA)
1043 if (pkey->type == EVP_PKEY_DSA)
1044 {
1045 /* lets do DSS */
1046 EVP_SignInit(&md_ctx,EVP_dss1());
1047 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1048 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1049 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1050 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1051 (unsigned int *)&i,pkey))
1052 {
1053 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1054 goto err;
1055 }
1056 s2n(i,p);
1057 n+=i+2;
1058 }
1059 else
1060#endif
1061 {
1062 /* Is this error check actually needed? */
1063 al=SSL_AD_HANDSHAKE_FAILURE;
1064 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1065 goto f_err;
1066 }
1067 }
1068
1069 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1070 l2n3(n,d);
1071
1072 /* we should now have things packed up, so lets send
1073 * it off */
1074 s->init_num=n+4;
1075 s->init_off=0;
1076 }
1077
1078 /* SSL3_ST_SW_KEY_EXCH_B */
1079 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1080f_err:
1081 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1082err:
1083 return(-1);
1084 }
1085
1086static int ssl3_send_certificate_request(SSL *s)
1087 {
1088 unsigned char *p,*d;
1089 int i,j,nl,off,n;
1090 STACK_OF(X509_NAME) *sk=NULL;
1091 X509_NAME *name;
1092 BUF_MEM *buf;
1093
1094 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1095 {
1096 buf=s->init_buf;
1097
1098 d=p=(unsigned char *)&(buf->data[4]);
1099
1100 /* get the list of acceptable cert types */
1101 p++;
1102 n=ssl3_get_req_cert_type(s,p);
1103 d[0]=n;
1104 p+=n;
1105 n++;
1106
1107 off=n;
1108 p+=2;
1109 n+=2;
1110
1111 sk=SSL_get_client_CA_list(s);
1112 nl=0;
1113 if (sk != NULL)
1114 {
1115 for (i=0; i<sk_X509_NAME_num(sk); i++)
1116 {
1117 name=sk_X509_NAME_value(sk,i);
1118 j=i2d_X509_NAME(name,NULL);
1119 if (!BUF_MEM_grow(buf,4+n+j+2))
1120 {
1121 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1122 goto err;
1123 }
1124 p=(unsigned char *)&(buf->data[4+n]);
1125 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1126 {
1127 s2n(j,p);
1128 i2d_X509_NAME(name,&p);
1129 n+=2+j;
1130 nl+=2+j;
1131 }
1132 else
1133 {
1134 d=p;
1135 i2d_X509_NAME(name,&p);
1136 j-=2; s2n(j,d); j+=2;
1137 n+=j;
1138 nl+=j;
1139 }
1140 }
1141 }
1142 /* else no CA names */
1143 p=(unsigned char *)&(buf->data[4+off]);
1144 s2n(nl,p);
1145
1146 d=(unsigned char *)buf->data;
1147 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1148 l2n3(n,d);
1149
1150 /* we should now have things packed up, so lets send
1151 * it off */
1152
1153 s->init_num=n+4;
1154 s->init_off=0;
1155 }
1156
1157 /* SSL3_ST_SW_CERT_REQ_B */
1158 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1159err:
1160 return(-1);
1161 }
1162
1163static int ssl3_get_client_key_exchange(SSL *s)
1164 {
1165 int i,al,ok;
1166 long n;
1167 unsigned long l;
1168 unsigned char *p;
1169#ifndef NO_RSA
1170 RSA *rsa=NULL;
1171 EVP_PKEY *pkey=NULL;
1172#endif
1173#ifndef NO_DH
1174 BIGNUM *pub=NULL;
1175 DH *dh_srvr;
1176#endif
1177
1178 n=ssl3_get_message(s,
1179 SSL3_ST_SR_KEY_EXCH_A,
1180 SSL3_ST_SR_KEY_EXCH_B,
1181 SSL3_MT_CLIENT_KEY_EXCHANGE,
1182 400, /* ???? */
1183 &ok);
1184
1185 if (!ok) return((int)n);
1186 p=(unsigned char *)s->init_buf->data;
1187
1188 l=s->s3->tmp.new_cipher->algorithms;
1189
1190#ifndef NO_RSA
1191 if (l & SSL_kRSA)
1192 {
1193 /* FIX THIS UP EAY EAY EAY EAY */
1194 if (s->s3->tmp.use_rsa_tmp)
1195 {
1196 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1197 rsa=s->cert->rsa_tmp;
1198 /* Don't do a callback because rsa_tmp should
1199 * be sent already */
1200 if (rsa == NULL)
1201 {
1202 al=SSL_AD_HANDSHAKE_FAILURE;
1203 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1204 goto f_err;
1205
1206 }
1207 }
1208 else
1209 {
1210 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1211 if ( (pkey == NULL) ||
1212 (pkey->type != EVP_PKEY_RSA) ||
1213 (pkey->pkey.rsa == NULL))
1214 {
1215 al=SSL_AD_HANDSHAKE_FAILURE;
1216 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1217 goto f_err;
1218 }
1219 rsa=pkey->pkey.rsa;
1220 }
1221
1222 /* TLS */
1223 if (s->version > SSL3_VERSION)
1224 {
1225 n2s(p,i);
1226 if (n != i+2)
1227 {
1228 if (!(s->options & SSL_OP_TLS_D5_BUG))
1229 {
1230 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1231 goto err;
1232 }
1233 else
1234 p-=2;
1235 }
1236 else
1237 n=i;
1238 }
1239
1240 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1241
1242#if 1
1243 /* If a bad decrypt, use a random master key */
1244 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1245 ((p[0] != (s->client_version>>8)) ||
1246 (p[1] != (s->client_version & 0xff))))
1247 {
1248 int bad=1;
1249
1250 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1251 (p[0] == (s->version>>8)) &&
1252 (p[1] == 0))
1253 {
1254 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1255 bad=0;
1256 }
1257 if (bad)
1258 {
1259 p[0]=(s->version>>8);
1260 p[1]=(s->version & 0xff);
1261 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1262 i=SSL_MAX_MASTER_KEY_LENGTH;
1263 }
1264 /* else, an SSLeay bug, ssl only server, tls client */
1265 }
1266#else
1267 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1268 {
1269 al=SSL_AD_DECODE_ERROR;
1270 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1271 goto f_err;
1272 }
1273
1274 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1275 {
1276 al=SSL_AD_DECODE_ERROR;
1277 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1278 goto f_err;
1279 }
1280#endif
1281
1282 s->session->master_key_length=
1283 s->method->ssl3_enc->generate_master_secret(s,
1284 s->session->master_key,
1285 p,i);
1286 memset(p,0,i);
1287 }
1288 else
1289#endif
1290#ifndef NO_DH
1291 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1292 {
1293 n2s(p,i);
1294 if (n != i+2)
1295 {
1296 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1297 {
1298 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1299 goto err;
1300 }
1301 else
1302 {
1303 p-=2;
1304 i=(int)n;
1305 }
1306 }
1307
1308 if (n == 0L) /* the parameters are in the cert */
1309 {
1310 al=SSL_AD_HANDSHAKE_FAILURE;
1311 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1312 goto f_err;
1313 }
1314 else
1315 {
1316 if (s->s3->tmp.dh == NULL)
1317 {
1318 al=SSL_AD_HANDSHAKE_FAILURE;
1319 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1320 goto f_err;
1321 }
1322 else
1323 dh_srvr=s->s3->tmp.dh;
1324 }
1325
1326 pub=BN_bin2bn(p,i,NULL);
1327 if (pub == NULL)
1328 {
1329 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1330 goto err;
1331 }
1332
1333 i=DH_compute_key(p,pub,dh_srvr);
1334
1335 if (i <= 0)
1336 {
1337 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1338 goto err;
1339 }
1340
1341 DH_free(s->s3->tmp.dh);
1342 s->s3->tmp.dh=NULL;
1343
1344 BN_clear_free(pub);
1345 pub=NULL;
1346 s->session->master_key_length=
1347 s->method->ssl3_enc->generate_master_secret(s,
1348 s->session->master_key,p,i);
1349 }
1350 else
1351#endif
1352 {
1353 al=SSL_AD_HANDSHAKE_FAILURE;
1354 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1355 goto f_err;
1356 }
1357
1358 return(1);
1359f_err:
1360 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1361#if !defined(NO_DH) || !defined(NO_RSA)
1362err:
1363#endif
1364 return(-1);
1365 }
1366
1367static int ssl3_get_cert_verify(SSL *s)
1368 {
1369 EVP_PKEY *pkey=NULL;
1370 unsigned char *p;
1371 int al,ok,ret=0;
1372 long n;
1373 int type=0,i,j;
1374 X509 *peer;
1375
1376 n=ssl3_get_message(s,
1377 SSL3_ST_SR_CERT_VRFY_A,
1378 SSL3_ST_SR_CERT_VRFY_B,
1379 -1,
1380 512, /* 512? */
1381 &ok);
1382
1383 if (!ok) return((int)n);
1384
1385 if (s->session->peer != NULL)
1386 {
1387 peer=s->session->peer;
1388 pkey=X509_get_pubkey(peer);
1389 type=X509_certificate_type(peer,pkey);
1390 }
1391 else
1392 {
1393 peer=NULL;
1394 pkey=NULL;
1395 }
1396
1397 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1398 {
1399 s->s3->tmp.reuse_message=1;
1400 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1401 {
1402 al=SSL_AD_UNEXPECTED_MESSAGE;
1403 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1404 goto f_err;
1405 }
1406 ret=1;
1407 goto end;
1408 }
1409
1410 if (peer == NULL)
1411 {
1412 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1413 al=SSL_AD_UNEXPECTED_MESSAGE;
1414 goto f_err;
1415 }
1416
1417 if (!(type & EVP_PKT_SIGN))
1418 {
1419 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1420 al=SSL_AD_ILLEGAL_PARAMETER;
1421 goto f_err;
1422 }
1423
1424 if (s->s3->change_cipher_spec)
1425 {
1426 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1427 al=SSL_AD_UNEXPECTED_MESSAGE;
1428 goto f_err;
1429 }
1430
1431 /* we now have a signature that we need to verify */
1432 p=(unsigned char *)s->init_buf->data;
1433 n2s(p,i);
1434 n-=2;
1435 if (i > n)
1436 {
1437 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1438 al=SSL_AD_DECODE_ERROR;
1439 goto f_err;
1440 }
1441
1442 j=EVP_PKEY_size(pkey);
1443 if ((i > j) || (n > j) || (n <= 0))
1444 {
1445 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1446 al=SSL_AD_DECODE_ERROR;
1447 goto f_err;
1448 }
1449
1450#ifndef NO_RSA
1451 if (pkey->type == EVP_PKEY_RSA)
1452 {
1453 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1454 if (i < 0)
1455 {
1456 al=SSL_AD_DECRYPT_ERROR;
1457 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1458 goto f_err;
1459 }
1460 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1461 memcmp(&(s->s3->tmp.finish_md[0]),p,
1462 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1463 {
1464 al=SSL_AD_DECRYPT_ERROR;
1465 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1466 goto f_err;
1467 }
1468 }
1469 else
1470#endif
1471#ifndef NO_DSA
1472 if (pkey->type == EVP_PKEY_DSA)
1473 {
1474 j=DSA_verify(pkey->save_type,
1475 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1476 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1477 if (j <= 0)
1478 {
1479 /* bad signature */
1480 al=SSL_AD_DECRYPT_ERROR;
1481 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1482 goto f_err;
1483 }
1484 }
1485 else
1486#endif
1487 {
1488 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1489 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1490 goto f_err;
1491 }
1492
1493
1494 ret=1;
1495 if (0)
1496 {
1497f_err:
1498 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1499 }
1500end:
1501 EVP_PKEY_free(pkey);
1502 return(ret);
1503 }
1504
1505static int ssl3_get_client_certificate(SSL *s)
1506 {
1507 int i,ok,al,ret= -1;
1508 X509 *x=NULL;
1509 unsigned long l,nc,llen,n;
1510 unsigned char *p,*d,*q;
1511 STACK_OF(X509) *sk=NULL;
1512
1513 n=ssl3_get_message(s,
1514 SSL3_ST_SR_CERT_A,
1515 SSL3_ST_SR_CERT_B,
1516 -1,
1517#if defined(MSDOS) && !defined(WIN32)
1518 1024*30, /* 30k max cert list :-) */
1519#else
1520 1024*100, /* 100k max cert list :-) */
1521#endif
1522 &ok);
1523
1524 if (!ok) return((int)n);
1525
1526 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1527 {
1528 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1529 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1530 {
1531 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1532 al=SSL_AD_HANDSHAKE_FAILURE;
1533 goto f_err;
1534 }
1535 /* If tls asked for a client cert we must return a 0 list */
1536 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1537 {
1538 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1539 al=SSL_AD_UNEXPECTED_MESSAGE;
1540 goto f_err;
1541 }
1542 s->s3->tmp.reuse_message=1;
1543 return(1);
1544 }
1545
1546 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1547 {
1548 al=SSL_AD_UNEXPECTED_MESSAGE;
1549 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1550 goto f_err;
1551 }
1552 d=p=(unsigned char *)s->init_buf->data;
1553
1554 if ((sk=sk_X509_new_null()) == NULL)
1555 {
1556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1557 goto err;
1558 }
1559
1560 n2l3(p,llen);
1561 if (llen+3 != n)
1562 {
1563 al=SSL_AD_DECODE_ERROR;
1564 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1565 goto f_err;
1566 }
1567 for (nc=0; nc<llen; )
1568 {
1569 n2l3(p,l);
1570 if ((l+nc+3) > llen)
1571 {
1572 al=SSL_AD_DECODE_ERROR;
1573 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1574 goto f_err;
1575 }
1576
1577 q=p;
1578 x=d2i_X509(NULL,&p,l);
1579 if (x == NULL)
1580 {
1581 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1582 goto err;
1583 }
1584 if (p != (q+l))
1585 {
1586 al=SSL_AD_DECODE_ERROR;
1587 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1588 goto f_err;
1589 }
1590 if (!sk_X509_push(sk,x))
1591 {
1592 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1593 goto err;
1594 }
1595 x=NULL;
1596 nc+=l+3;
1597 }
1598
1599 if (sk_X509_num(sk) <= 0)
1600 {
1601 /* TLS does not mind 0 certs returned */
1602 if (s->version == SSL3_VERSION)
1603 {
1604 al=SSL_AD_HANDSHAKE_FAILURE;
1605 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1606 goto f_err;
1607 }
1608 /* Fail for TLS only if we required a certificate */
1609 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1610 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1611 {
1612 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1613 al=SSL_AD_HANDSHAKE_FAILURE;
1614 goto f_err;
1615 }
1616 }
1617 else
1618 {
1619 i=ssl_verify_cert_chain(s,sk);
1620 if (!i)
1621 {
1622 al=ssl_verify_alarm_type(s->verify_result);
1623 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1624 goto f_err;
1625 }
1626 }
1627
1628 if (s->session->peer != NULL) /* This should not be needed */
1629 X509_free(s->session->peer);
1630 s->session->peer=sk_X509_shift(sk);
1631
1632 /* With the current implementation, sess_cert will always be NULL
1633 * when we arrive here. */
1634 if (s->session->sess_cert == NULL)
1635 {
1636 s->session->sess_cert = ssl_sess_cert_new();
1637 if (s->session->sess_cert == NULL)
1638 {
1639 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1640 goto err;
1641 }
1642 }
1643 if (s->session->sess_cert->cert_chain != NULL)
1644 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1645 s->session->sess_cert->cert_chain=sk;
1646
1647 sk=NULL;
1648
1649 ret=1;
1650 if (0)
1651 {
1652f_err:
1653 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1654 }
1655err:
1656 if (x != NULL) X509_free(x);
1657 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1658 return(ret);
1659 }
1660
1661int ssl3_send_server_certificate(SSL *s)
1662 {
1663 unsigned long l;
1664 X509 *x;
1665
1666 if (s->state == SSL3_ST_SW_CERT_A)
1667 {
1668 x=ssl_get_server_send_cert(s);
1669 if (x == NULL)
1670 {
1671 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1672 return(0);
1673 }
1674
1675 l=ssl3_output_cert_chain(s,x);
1676 s->state=SSL3_ST_SW_CERT_B;
1677 s->init_num=(int)l;
1678 s->init_off=0;
1679 }
1680
1681 /* SSL3_ST_SW_CERT_B */
1682 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1683 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-22 12:27:43 +0000