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-rw-r--r--src/lib/libssl/s3_clnt.c1730
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diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
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1/* ssl/s3_clnt.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <openssl/buffer.h>
61#include <openssl/rand.h>
62#include <openssl/objects.h>
63#include <openssl/md5.h>
64#include <openssl/sha.h>
65#include <openssl/evp.h>
66#include "ssl_locl.h"
67
68static SSL_METHOD *ssl3_get_client_method(int ver);
69static int ssl3_client_hello(SSL *s);
70static int ssl3_get_server_hello(SSL *s);
71static int ssl3_get_certificate_request(SSL *s);
72static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
73static int ssl3_get_server_done(SSL *s);
74static int ssl3_send_client_verify(SSL *s);
75static int ssl3_send_client_certificate(SSL *s);
76static int ssl3_send_client_key_exchange(SSL *s);
77static int ssl3_get_key_exchange(SSL *s);
78static int ssl3_get_server_certificate(SSL *s);
79static int ssl3_check_cert_and_algorithm(SSL *s);
80static SSL_METHOD *ssl3_get_client_method(int ver)
81 {
82 if (ver == SSL3_VERSION)
83 return(SSLv3_client_method());
84 else
85 return(NULL);
86 }
87
88SSL_METHOD *SSLv3_client_method(void)
89 {
90 static int init=1;
91 static SSL_METHOD SSLv3_client_data;
92
93 if (init)
94 {
95 init=0;
96 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
97 sizeof(SSL_METHOD));
98 SSLv3_client_data.ssl_connect=ssl3_connect;
99 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
100 }
101 return(&SSLv3_client_data);
102 }
103
104int ssl3_connect(SSL *s)
105 {
106 BUF_MEM *buf;
107 unsigned long Time=time(NULL),l;
108 long num1;
109 void (*cb)()=NULL;
110 int ret= -1;
111 int new_state,state,skip=0;;
112
113 RAND_add(&Time,sizeof(Time),0);
114 ERR_clear_error();
115 clear_sys_error();
116
117 if (s->info_callback != NULL)
118 cb=s->info_callback;
119 else if (s->ctx->info_callback != NULL)
120 cb=s->ctx->info_callback;
121
122 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
123 s->in_handshake++;
124
125 for (;;)
126 {
127 state=s->state;
128
129 switch(s->state)
130 {
131 case SSL_ST_RENEGOTIATE:
132 s->new_session=1;
133 s->state=SSL_ST_CONNECT;
134 s->ctx->stats.sess_connect_renegotiate++;
135 /* break */
136 case SSL_ST_BEFORE:
137 case SSL_ST_CONNECT:
138 case SSL_ST_BEFORE|SSL_ST_CONNECT:
139 case SSL_ST_OK|SSL_ST_CONNECT:
140
141 s->server=0;
142 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
143
144 if ((s->version & 0xff00 ) != 0x0300)
145 abort();
146 /* s->version=SSL3_VERSION; */
147 s->type=SSL_ST_CONNECT;
148
149 if (s->init_buf == NULL)
150 {
151 if ((buf=BUF_MEM_new()) == NULL)
152 {
153 ret= -1;
154 goto end;
155 }
156 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
157 {
158 ret= -1;
159 goto end;
160 }
161 s->init_buf=buf;
162 }
163
164 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
165
166 /* setup buffing BIO */
167 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
168
169 /* don't push the buffering BIO quite yet */
170
171 ssl3_init_finished_mac(s);
172
173 s->state=SSL3_ST_CW_CLNT_HELLO_A;
174 s->ctx->stats.sess_connect++;
175 s->init_num=0;
176 break;
177
178 case SSL3_ST_CW_CLNT_HELLO_A:
179 case SSL3_ST_CW_CLNT_HELLO_B:
180
181 s->shutdown=0;
182 ret=ssl3_client_hello(s);
183 if (ret <= 0) goto end;
184 s->state=SSL3_ST_CR_SRVR_HELLO_A;
185 s->init_num=0;
186
187 /* turn on buffering for the next lot of output */
188 if (s->bbio != s->wbio)
189 s->wbio=BIO_push(s->bbio,s->wbio);
190
191 break;
192
193 case SSL3_ST_CR_SRVR_HELLO_A:
194 case SSL3_ST_CR_SRVR_HELLO_B:
195 ret=ssl3_get_server_hello(s);
196 if (ret <= 0) goto end;
197 if (s->hit)
198 s->state=SSL3_ST_CR_FINISHED_A;
199 else
200 s->state=SSL3_ST_CR_CERT_A;
201 s->init_num=0;
202 break;
203
204 case SSL3_ST_CR_CERT_A:
205 case SSL3_ST_CR_CERT_B:
206 /* Check if it is anon DH */
207 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
208 {
209 ret=ssl3_get_server_certificate(s);
210 if (ret <= 0) goto end;
211 }
212 else
213 skip=1;
214 s->state=SSL3_ST_CR_KEY_EXCH_A;
215 s->init_num=0;
216 break;
217
218 case SSL3_ST_CR_KEY_EXCH_A:
219 case SSL3_ST_CR_KEY_EXCH_B:
220 ret=ssl3_get_key_exchange(s);
221 if (ret <= 0) goto end;
222 s->state=SSL3_ST_CR_CERT_REQ_A;
223 s->init_num=0;
224
225 /* at this point we check that we have the
226 * required stuff from the server */
227 if (!ssl3_check_cert_and_algorithm(s))
228 {
229 ret= -1;
230 goto end;
231 }
232 break;
233
234 case SSL3_ST_CR_CERT_REQ_A:
235 case SSL3_ST_CR_CERT_REQ_B:
236 ret=ssl3_get_certificate_request(s);
237 if (ret <= 0) goto end;
238 s->state=SSL3_ST_CR_SRVR_DONE_A;
239 s->init_num=0;
240 break;
241
242 case SSL3_ST_CR_SRVR_DONE_A:
243 case SSL3_ST_CR_SRVR_DONE_B:
244 ret=ssl3_get_server_done(s);
245 if (ret <= 0) goto end;
246 if (s->s3->tmp.cert_req)
247 s->state=SSL3_ST_CW_CERT_A;
248 else
249 s->state=SSL3_ST_CW_KEY_EXCH_A;
250 s->init_num=0;
251
252 break;
253
254 case SSL3_ST_CW_CERT_A:
255 case SSL3_ST_CW_CERT_B:
256 case SSL3_ST_CW_CERT_C:
257 case SSL3_ST_CW_CERT_D:
258 ret=ssl3_send_client_certificate(s);
259 if (ret <= 0) goto end;
260 s->state=SSL3_ST_CW_KEY_EXCH_A;
261 s->init_num=0;
262 break;
263
264 case SSL3_ST_CW_KEY_EXCH_A:
265 case SSL3_ST_CW_KEY_EXCH_B:
266 ret=ssl3_send_client_key_exchange(s);
267 if (ret <= 0) goto end;
268 l=s->s3->tmp.new_cipher->algorithms;
269 /* EAY EAY EAY need to check for DH fix cert
270 * sent back */
271 /* For TLS, cert_req is set to 2, so a cert chain
272 * of nothing is sent, but no verify packet is sent */
273 if (s->s3->tmp.cert_req == 1)
274 {
275 s->state=SSL3_ST_CW_CERT_VRFY_A;
276 }
277 else
278 {
279 s->state=SSL3_ST_CW_CHANGE_A;
280 s->s3->change_cipher_spec=0;
281 }
282
283 s->init_num=0;
284 break;
285
286 case SSL3_ST_CW_CERT_VRFY_A:
287 case SSL3_ST_CW_CERT_VRFY_B:
288 ret=ssl3_send_client_verify(s);
289 if (ret <= 0) goto end;
290 s->state=SSL3_ST_CW_CHANGE_A;
291 s->init_num=0;
292 s->s3->change_cipher_spec=0;
293 break;
294
295 case SSL3_ST_CW_CHANGE_A:
296 case SSL3_ST_CW_CHANGE_B:
297 ret=ssl3_send_change_cipher_spec(s,
298 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
299 if (ret <= 0) goto end;
300 s->state=SSL3_ST_CW_FINISHED_A;
301 s->init_num=0;
302
303 s->session->cipher=s->s3->tmp.new_cipher;
304 if (s->s3->tmp.new_compression == NULL)
305 s->session->compress_meth=0;
306 else
307 s->session->compress_meth=
308 s->s3->tmp.new_compression->id;
309 if (!s->method->ssl3_enc->setup_key_block(s))
310 {
311 ret= -1;
312 goto end;
313 }
314
315 if (!s->method->ssl3_enc->change_cipher_state(s,
316 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
317 {
318 ret= -1;
319 goto end;
320 }
321
322 break;
323
324 case SSL3_ST_CW_FINISHED_A:
325 case SSL3_ST_CW_FINISHED_B:
326 ret=ssl3_send_finished(s,
327 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
328 s->method->ssl3_enc->client_finished_label,
329 s->method->ssl3_enc->client_finished_label_len);
330 if (ret <= 0) goto end;
331 s->state=SSL3_ST_CW_FLUSH;
332
333 /* clear flags */
334 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
335 if (s->hit)
336 {
337 s->s3->tmp.next_state=SSL_ST_OK;
338 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
339 {
340 s->state=SSL_ST_OK;
341 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
342 s->s3->delay_buf_pop_ret=0;
343 }
344 }
345 else
346 {
347 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
348 }
349 s->init_num=0;
350 break;
351
352 case SSL3_ST_CR_FINISHED_A:
353 case SSL3_ST_CR_FINISHED_B:
354
355 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
356 SSL3_ST_CR_FINISHED_B);
357 if (ret <= 0) goto end;
358
359 if (s->hit)
360 s->state=SSL3_ST_CW_CHANGE_A;
361 else
362 s->state=SSL_ST_OK;
363 s->init_num=0;
364 break;
365
366 case SSL3_ST_CW_FLUSH:
367 /* number of bytes to be flushed */
368 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
369 if (num1 > 0)
370 {
371 s->rwstate=SSL_WRITING;
372 num1=BIO_flush(s->wbio);
373 if (num1 <= 0) { ret= -1; goto end; }
374 s->rwstate=SSL_NOTHING;
375 }
376
377 s->state=s->s3->tmp.next_state;
378 break;
379
380 case SSL_ST_OK:
381 /* clean a few things up */
382 ssl3_cleanup_key_block(s);
383
384 if (s->init_buf != NULL)
385 {
386 BUF_MEM_free(s->init_buf);
387 s->init_buf=NULL;
388 }
389
390 /* If we are not 'joining' the last two packets,
391 * remove the buffering now */
392 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
393 ssl_free_wbio_buffer(s);
394 /* else do it later in ssl3_write */
395
396 s->init_num=0;
397 s->new_session=0;
398
399 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
400 if (s->hit) s->ctx->stats.sess_hit++;
401
402 ret=1;
403 /* s->server=0; */
404 s->handshake_func=ssl3_connect;
405 s->ctx->stats.sess_connect_good++;
406
407 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
408
409 goto end;
410 /* break; */
411
412 default:
413 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
414 ret= -1;
415 goto end;
416 /* break; */
417 }
418
419 /* did we do anything */
420 if (!s->s3->tmp.reuse_message && !skip)
421 {
422 if (s->debug)
423 {
424 if ((ret=BIO_flush(s->wbio)) <= 0)
425 goto end;
426 }
427
428 if ((cb != NULL) && (s->state != state))
429 {
430 new_state=s->state;
431 s->state=state;
432 cb(s,SSL_CB_CONNECT_LOOP,1);
433 s->state=new_state;
434 }
435 }
436 skip=0;
437 }
438end:
439 if (cb != NULL)
440 cb(s,SSL_CB_CONNECT_EXIT,ret);
441 s->in_handshake--;
442 return(ret);
443 }
444
445
446static int ssl3_client_hello(SSL *s)
447 {
448 unsigned char *buf;
449 unsigned char *p,*d;
450 int i,j;
451 unsigned long Time,l;
452 SSL_COMP *comp;
453
454 buf=(unsigned char *)s->init_buf->data;
455 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
456 {
457 if ((s->session == NULL) ||
458 (s->session->ssl_version != s->version) ||
459 (s->session->not_resumable))
460 {
461 if (!ssl_get_new_session(s,0))
462 goto err;
463 }
464 /* else use the pre-loaded session */
465
466 p=s->s3->client_random;
467 Time=time(NULL); /* Time */
468 l2n(Time,p);
469 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
470
471 /* Do the message type and length last */
472 d=p= &(buf[4]);
473
474 *(p++)=s->version>>8;
475 *(p++)=s->version&0xff;
476 s->client_version=s->version;
477
478 /* Random stuff */
479 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
480 p+=SSL3_RANDOM_SIZE;
481
482 /* Session ID */
483 if (s->new_session)
484 i=0;
485 else
486 i=s->session->session_id_length;
487 *(p++)=i;
488 if (i != 0)
489 {
490 memcpy(p,s->session->session_id,i);
491 p+=i;
492 }
493
494 /* Ciphers supported */
495 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
496 if (i == 0)
497 {
498 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
499 goto err;
500 }
501 s2n(i,p);
502 p+=i;
503
504 /* COMPRESSION */
505 if (s->ctx->comp_methods == NULL)
506 j=0;
507 else
508 j=sk_SSL_COMP_num(s->ctx->comp_methods);
509 *(p++)=1+j;
510 for (i=0; i<j; i++)
511 {
512 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
513 *(p++)=comp->id;
514 }
515 *(p++)=0; /* Add the NULL method */
516
517 l=(p-d);
518 d=buf;
519 *(d++)=SSL3_MT_CLIENT_HELLO;
520 l2n3(l,d);
521
522 s->state=SSL3_ST_CW_CLNT_HELLO_B;
523 /* number of bytes to write */
524 s->init_num=p-buf;
525 s->init_off=0;
526 }
527
528 /* SSL3_ST_CW_CLNT_HELLO_B */
529 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
530err:
531 return(-1);
532 }
533
534static int ssl3_get_server_hello(SSL *s)
535 {
536 STACK_OF(SSL_CIPHER) *sk;
537 SSL_CIPHER *c;
538 unsigned char *p,*d;
539 int i,al,ok;
540 unsigned int j;
541 long n;
542 SSL_COMP *comp;
543
544 n=ssl3_get_message(s,
545 SSL3_ST_CR_SRVR_HELLO_A,
546 SSL3_ST_CR_SRVR_HELLO_B,
547 SSL3_MT_SERVER_HELLO,
548 300, /* ?? */
549 &ok);
550
551 if (!ok) return((int)n);
552 d=p=(unsigned char *)s->init_buf->data;
553
554 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
555 {
556 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
557 s->version=(s->version&0xff00)|p[1];
558 al=SSL_AD_PROTOCOL_VERSION;
559 goto f_err;
560 }
561 p+=2;
562
563 /* load the server hello data */
564 /* load the server random */
565 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
566 p+=SSL3_RANDOM_SIZE;
567
568 /* get the session-id */
569 j= *(p++);
570
571 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
572 {
573 /* SSLref returns 16 :-( */
574 if (j < SSL2_SSL_SESSION_ID_LENGTH)
575 {
576 al=SSL_AD_ILLEGAL_PARAMETER;
577 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
578 goto f_err;
579 }
580 }
581 if (j != 0 && j == s->session->session_id_length
582 && memcmp(p,s->session->session_id,j) == 0)
583 {
584 if(s->sid_ctx_length != s->session->sid_ctx_length
585 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
586 {
587 al=SSL_AD_ILLEGAL_PARAMETER;
588 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
589 goto f_err;
590 }
591 s->hit=1;
592 }
593 else /* a miss or crap from the other end */
594 {
595 /* If we were trying for session-id reuse, make a new
596 * SSL_SESSION so we don't stuff up other people */
597 s->hit=0;
598 if (s->session->session_id_length > 0)
599 {
600 if (!ssl_get_new_session(s,0))
601 {
602 al=SSL_AD_INTERNAL_ERROR;
603 goto f_err;
604 }
605 }
606 s->session->session_id_length=j;
607 memcpy(s->session->session_id,p,j); /* j could be 0 */
608 }
609 p+=j;
610 c=ssl_get_cipher_by_char(s,p);
611 if (c == NULL)
612 {
613 /* unknown cipher */
614 al=SSL_AD_ILLEGAL_PARAMETER;
615 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
616 goto f_err;
617 }
618 p+=ssl_put_cipher_by_char(s,NULL,NULL);
619
620 sk=ssl_get_ciphers_by_id(s);
621 i=sk_SSL_CIPHER_find(sk,c);
622 if (i < 0)
623 {
624 /* we did not say we would use this cipher */
625 al=SSL_AD_ILLEGAL_PARAMETER;
626 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
627 goto f_err;
628 }
629
630 if (s->hit && (s->session->cipher != c))
631 {
632 if (!(s->options &
633 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
634 {
635 al=SSL_AD_ILLEGAL_PARAMETER;
636 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
637 goto f_err;
638 }
639 }
640 s->s3->tmp.new_cipher=c;
641
642 /* lets get the compression algorithm */
643 /* COMPRESSION */
644 j= *(p++);
645 if (j == 0)
646 comp=NULL;
647 else
648 comp=ssl3_comp_find(s->ctx->comp_methods,j);
649
650 if ((j != 0) && (comp == NULL))
651 {
652 al=SSL_AD_ILLEGAL_PARAMETER;
653 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
654 goto f_err;
655 }
656 else
657 {
658 s->s3->tmp.new_compression=comp;
659 }
660
661 if (p != (d+n))
662 {
663 /* wrong packet length */
664 al=SSL_AD_DECODE_ERROR;
665 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
666 goto err;
667 }
668
669 return(1);
670f_err:
671 ssl3_send_alert(s,SSL3_AL_FATAL,al);
672err:
673 return(-1);
674 }
675
676static int ssl3_get_server_certificate(SSL *s)
677 {
678 int al,i,ok,ret= -1;
679 unsigned long n,nc,llen,l;
680 X509 *x=NULL;
681 unsigned char *p,*d,*q;
682 STACK_OF(X509) *sk=NULL;
683 SESS_CERT *sc;
684 EVP_PKEY *pkey=NULL;
685
686 n=ssl3_get_message(s,
687 SSL3_ST_CR_CERT_A,
688 SSL3_ST_CR_CERT_B,
689 -1,
690#if defined(MSDOS) && !defined(WIN32)
691 1024*30, /* 30k max cert list :-) */
692#else
693 1024*100, /* 100k max cert list :-) */
694#endif
695 &ok);
696
697 if (!ok) return((int)n);
698
699 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
700 {
701 s->s3->tmp.reuse_message=1;
702 return(1);
703 }
704
705 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
706 {
707 al=SSL_AD_UNEXPECTED_MESSAGE;
708 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
709 goto f_err;
710 }
711 d=p=(unsigned char *)s->init_buf->data;
712
713 if ((sk=sk_X509_new_null()) == NULL)
714 {
715 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
716 goto err;
717 }
718
719 n2l3(p,llen);
720 if (llen+3 != n)
721 {
722 al=SSL_AD_DECODE_ERROR;
723 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
724 goto f_err;
725 }
726 for (nc=0; nc<llen; )
727 {
728 n2l3(p,l);
729 if ((l+nc+3) > llen)
730 {
731 al=SSL_AD_DECODE_ERROR;
732 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
733 goto f_err;
734 }
735
736 q=p;
737 x=d2i_X509(NULL,&q,l);
738 if (x == NULL)
739 {
740 al=SSL_AD_BAD_CERTIFICATE;
741 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
742 goto f_err;
743 }
744 if (q != (p+l))
745 {
746 al=SSL_AD_DECODE_ERROR;
747 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
748 goto f_err;
749 }
750 if (!sk_X509_push(sk,x))
751 {
752 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
753 goto err;
754 }
755 x=NULL;
756 nc+=l+3;
757 p=q;
758 }
759
760 i=ssl_verify_cert_chain(s,sk);
761 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
762 {
763 al=ssl_verify_alarm_type(s->verify_result);
764 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
765 goto f_err;
766 }
767
768 sc=ssl_sess_cert_new();
769 if (sc == NULL) goto err;
770
771 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
772 s->session->sess_cert=sc;
773
774 sc->cert_chain=sk;
775 /* Inconsistency alert: cert_chain does include the peer's
776 * certificate, which we don't include in s3_srvr.c */
777 x=sk_X509_value(sk,0);
778 sk=NULL;
779
780 pkey=X509_get_pubkey(x);
781
782 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
783 {
784 x=NULL;
785 al=SSL3_AL_FATAL;
786 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
787 goto f_err;
788 }
789
790 i=ssl_cert_type(x,pkey);
791 if (i < 0)
792 {
793 x=NULL;
794 al=SSL3_AL_FATAL;
795 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
796 goto f_err;
797 }
798
799 sc->peer_cert_type=i;
800 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
801 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
802 * We just created sc a couple of
803 * lines ago. */
804 X509_free(sc->peer_pkeys[i].x509);
805 sc->peer_pkeys[i].x509=x;
806 sc->peer_key= &(sc->peer_pkeys[i]);
807
808 if (s->session->peer != NULL)
809 X509_free(s->session->peer);
810 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
811 s->session->peer=x;
812
813 x=NULL;
814 ret=1;
815
816 if (0)
817 {
818f_err:
819 ssl3_send_alert(s,SSL3_AL_FATAL,al);
820 }
821err:
822 EVP_PKEY_free(pkey);
823 X509_free(x);
824 sk_X509_pop_free(sk,X509_free);
825 return(ret);
826 }
827
828static int ssl3_get_key_exchange(SSL *s)
829 {
830#ifndef NO_RSA
831 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
832#endif
833 EVP_MD_CTX md_ctx;
834 unsigned char *param,*p;
835 int al,i,j,param_len,ok;
836 long n,alg;
837 EVP_PKEY *pkey=NULL;
838#ifndef NO_RSA
839 RSA *rsa=NULL;
840#endif
841#ifndef NO_DH
842 DH *dh=NULL;
843#endif
844
845 n=ssl3_get_message(s,
846 SSL3_ST_CR_KEY_EXCH_A,
847 SSL3_ST_CR_KEY_EXCH_B,
848 -1,
849 1024*8, /* ?? */
850 &ok);
851
852 if (!ok) return((int)n);
853
854 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
855 {
856 s->s3->tmp.reuse_message=1;
857 return(1);
858 }
859
860 param=p=(unsigned char *)s->init_buf->data;
861
862 if (s->session->sess_cert != NULL)
863 {
864#ifndef NO_RSA
865 if (s->session->sess_cert->peer_rsa_tmp != NULL)
866 {
867 RSA_free(s->session->sess_cert->peer_rsa_tmp);
868 s->session->sess_cert->peer_rsa_tmp=NULL;
869 }
870#endif
871#ifndef NO_DH
872 if (s->session->sess_cert->peer_dh_tmp)
873 {
874 DH_free(s->session->sess_cert->peer_dh_tmp);
875 s->session->sess_cert->peer_dh_tmp=NULL;
876 }
877#endif
878 }
879 else
880 {
881 s->session->sess_cert=ssl_sess_cert_new();
882 }
883
884 param_len=0;
885 alg=s->s3->tmp.new_cipher->algorithms;
886
887#ifndef NO_RSA
888 if (alg & SSL_kRSA)
889 {
890 if ((rsa=RSA_new()) == NULL)
891 {
892 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
893 goto err;
894 }
895 n2s(p,i);
896 param_len=i+2;
897 if (param_len > n)
898 {
899 al=SSL_AD_DECODE_ERROR;
900 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
901 goto f_err;
902 }
903 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
904 {
905 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
906 goto err;
907 }
908 p+=i;
909
910 n2s(p,i);
911 param_len+=i+2;
912 if (param_len > n)
913 {
914 al=SSL_AD_DECODE_ERROR;
915 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
916 goto f_err;
917 }
918 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
919 {
920 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
921 goto err;
922 }
923 p+=i;
924 n-=param_len;
925
926 /* this should be because we are using an export cipher */
927 if (alg & SSL_aRSA)
928 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
929 else
930 {
931 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
932 goto err;
933 }
934 s->session->sess_cert->peer_rsa_tmp=rsa;
935 rsa=NULL;
936 }
937 else
938#endif
939#ifndef NO_DH
940 if (alg & SSL_kEDH)
941 {
942 if ((dh=DH_new()) == NULL)
943 {
944 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
945 goto err;
946 }
947 n2s(p,i);
948 param_len=i+2;
949 if (param_len > n)
950 {
951 al=SSL_AD_DECODE_ERROR;
952 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
953 goto f_err;
954 }
955 if (!(dh->p=BN_bin2bn(p,i,NULL)))
956 {
957 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
958 goto err;
959 }
960 p+=i;
961
962 n2s(p,i);
963 param_len+=i+2;
964 if (param_len > n)
965 {
966 al=SSL_AD_DECODE_ERROR;
967 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
968 goto f_err;
969 }
970 if (!(dh->g=BN_bin2bn(p,i,NULL)))
971 {
972 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
973 goto err;
974 }
975 p+=i;
976
977 n2s(p,i);
978 param_len+=i+2;
979 if (param_len > n)
980 {
981 al=SSL_AD_DECODE_ERROR;
982 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
983 goto f_err;
984 }
985 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
986 {
987 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
988 goto err;
989 }
990 p+=i;
991 n-=param_len;
992
993#ifndef NO_RSA
994 if (alg & SSL_aRSA)
995 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
996 else
997#endif
998#ifndef NO_DSA
999 if (alg & SSL_aDSS)
1000 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1001#endif
1002 /* else anonymous DH, so no certificate or pkey. */
1003
1004 s->session->sess_cert->peer_dh_tmp=dh;
1005 dh=NULL;
1006 }
1007 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1008 {
1009 al=SSL_AD_ILLEGAL_PARAMETER;
1010 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1011 goto f_err;
1012 }
1013#endif
1014 if (alg & SSL_aFZA)
1015 {
1016 al=SSL_AD_HANDSHAKE_FAILURE;
1017 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1018 goto f_err;
1019 }
1020
1021
1022 /* p points to the next byte, there are 'n' bytes left */
1023
1024
1025 /* if it was signed, check the signature */
1026 if (pkey != NULL)
1027 {
1028 n2s(p,i);
1029 n-=2;
1030 j=EVP_PKEY_size(pkey);
1031
1032 if ((i != n) || (n > j) || (n <= 0))
1033 {
1034 /* wrong packet length */
1035 al=SSL_AD_DECODE_ERROR;
1036 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1037 goto f_err;
1038 }
1039
1040#ifndef NO_RSA
1041 if (pkey->type == EVP_PKEY_RSA)
1042 {
1043 int num;
1044
1045 j=0;
1046 q=md_buf;
1047 for (num=2; num > 0; num--)
1048 {
1049 EVP_DigestInit(&md_ctx,(num == 2)
1050 ?s->ctx->md5:s->ctx->sha1);
1051 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1052 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1053 EVP_DigestUpdate(&md_ctx,param,param_len);
1054 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1055 q+=i;
1056 j+=i;
1057 }
1058 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1059 pkey->pkey.rsa);
1060 if (i < 0)
1061 {
1062 al=SSL_AD_DECRYPT_ERROR;
1063 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1064 goto f_err;
1065 }
1066 if (i == 0)
1067 {
1068 /* bad signature */
1069 al=SSL_AD_DECRYPT_ERROR;
1070 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1071 goto f_err;
1072 }
1073 }
1074 else
1075#endif
1076#ifndef NO_DSA
1077 if (pkey->type == EVP_PKEY_DSA)
1078 {
1079 /* lets do DSS */
1080 EVP_VerifyInit(&md_ctx,EVP_dss1());
1081 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1082 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1083 EVP_VerifyUpdate(&md_ctx,param,param_len);
1084 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1085 {
1086 /* bad signature */
1087 al=SSL_AD_DECRYPT_ERROR;
1088 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1089 goto f_err;
1090 }
1091 }
1092 else
1093#endif
1094 {
1095 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1096 goto err;
1097 }
1098 }
1099 else
1100 {
1101 /* still data left over */
1102 if (!(alg & SSL_aNULL))
1103 {
1104 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1105 goto err;
1106 }
1107 if (n != 0)
1108 {
1109 al=SSL_AD_DECODE_ERROR;
1110 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1111 goto f_err;
1112 }
1113 }
1114 EVP_PKEY_free(pkey);
1115 return(1);
1116f_err:
1117 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1118err:
1119 EVP_PKEY_free(pkey);
1120#ifndef NO_RSA
1121 if (rsa != NULL)
1122 RSA_free(rsa);
1123#endif
1124#ifndef NO_DH
1125 if (dh != NULL)
1126 DH_free(dh);
1127#endif
1128 return(-1);
1129 }
1130
1131static int ssl3_get_certificate_request(SSL *s)
1132 {
1133 int ok,ret=0;
1134 unsigned long n,nc,l;
1135 unsigned int llen,ctype_num,i;
1136 X509_NAME *xn=NULL;
1137 unsigned char *p,*d,*q;
1138 STACK_OF(X509_NAME) *ca_sk=NULL;
1139
1140 n=ssl3_get_message(s,
1141 SSL3_ST_CR_CERT_REQ_A,
1142 SSL3_ST_CR_CERT_REQ_B,
1143 -1,
1144#if defined(MSDOS) && !defined(WIN32)
1145 1024*30, /* 30k max cert list :-) */
1146#else
1147 1024*100, /* 100k max cert list :-) */
1148#endif
1149 &ok);
1150
1151 if (!ok) return((int)n);
1152
1153 s->s3->tmp.cert_req=0;
1154
1155 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1156 {
1157 s->s3->tmp.reuse_message=1;
1158 return(1);
1159 }
1160
1161 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1162 {
1163 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1164 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1165 goto err;
1166 }
1167
1168 /* TLS does not like anon-DH with client cert */
1169 if (s->version > SSL3_VERSION)
1170 {
1171 l=s->s3->tmp.new_cipher->algorithms;
1172 if (l & SSL_aNULL)
1173 {
1174 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1175 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1176 goto err;
1177 }
1178 }
1179
1180 d=p=(unsigned char *)s->init_buf->data;
1181
1182 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1183 {
1184 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1185 goto err;
1186 }
1187
1188 /* get the certificate types */
1189 ctype_num= *(p++);
1190 if (ctype_num > SSL3_CT_NUMBER)
1191 ctype_num=SSL3_CT_NUMBER;
1192 for (i=0; i<ctype_num; i++)
1193 s->s3->tmp.ctype[i]= p[i];
1194 p+=ctype_num;
1195
1196 /* get the CA RDNs */
1197 n2s(p,llen);
1198#if 0
1199{
1200FILE *out;
1201out=fopen("/tmp/vsign.der","w");
1202fwrite(p,1,llen,out);
1203fclose(out);
1204}
1205#endif
1206
1207 if ((llen+ctype_num+2+1) != n)
1208 {
1209 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1210 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1211 goto err;
1212 }
1213
1214 for (nc=0; nc<llen; )
1215 {
1216 n2s(p,l);
1217 if ((l+nc+2) > llen)
1218 {
1219 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1220 goto cont; /* netscape bugs */
1221 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1222 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1223 goto err;
1224 }
1225
1226 q=p;
1227
1228 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1229 {
1230 /* If netscape tolerance is on, ignore errors */
1231 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1232 goto cont;
1233 else
1234 {
1235 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1236 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1237 goto err;
1238 }
1239 }
1240
1241 if (q != (p+l))
1242 {
1243 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1244 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1245 goto err;
1246 }
1247 if (!sk_X509_NAME_push(ca_sk,xn))
1248 {
1249 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1250 goto err;
1251 }
1252
1253 p+=l;
1254 nc+=l+2;
1255 }
1256
1257 if (0)
1258 {
1259cont:
1260 ERR_clear_error();
1261 }
1262
1263 /* we should setup a certificate to return.... */
1264 s->s3->tmp.cert_req=1;
1265 s->s3->tmp.ctype_num=ctype_num;
1266 if (s->s3->tmp.ca_names != NULL)
1267 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1268 s->s3->tmp.ca_names=ca_sk;
1269 ca_sk=NULL;
1270
1271 ret=1;
1272err:
1273 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1274 return(ret);
1275 }
1276
1277static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
1278 {
1279 return(X509_NAME_cmp(*a,*b));
1280 }
1281
1282static int ssl3_get_server_done(SSL *s)
1283 {
1284 int ok,ret=0;
1285 long n;
1286
1287 n=ssl3_get_message(s,
1288 SSL3_ST_CR_SRVR_DONE_A,
1289 SSL3_ST_CR_SRVR_DONE_B,
1290 SSL3_MT_SERVER_DONE,
1291 30, /* should be very small, like 0 :-) */
1292 &ok);
1293
1294 if (!ok) return((int)n);
1295 if (n > 0)
1296 {
1297 /* should contain no data */
1298 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1299 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1300 }
1301 ret=1;
1302 return(ret);
1303 }
1304
1305static int ssl3_send_client_key_exchange(SSL *s)
1306 {
1307 unsigned char *p,*d;
1308 int n;
1309 unsigned long l;
1310#ifndef NO_RSA
1311 unsigned char *q;
1312 EVP_PKEY *pkey=NULL;
1313#endif
1314
1315 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1316 {
1317 d=(unsigned char *)s->init_buf->data;
1318 p= &(d[4]);
1319
1320 l=s->s3->tmp.new_cipher->algorithms;
1321
1322#ifndef NO_RSA
1323 if (l & SSL_kRSA)
1324 {
1325 RSA *rsa;
1326 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1327
1328 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1329 rsa=s->session->sess_cert->peer_rsa_tmp;
1330 else
1331 {
1332 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1333 if ((pkey == NULL) ||
1334 (pkey->type != EVP_PKEY_RSA) ||
1335 (pkey->pkey.rsa == NULL))
1336 {
1337 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1338 goto err;
1339 }
1340 rsa=pkey->pkey.rsa;
1341 EVP_PKEY_free(pkey);
1342 }
1343
1344 tmp_buf[0]=s->client_version>>8;
1345 tmp_buf[1]=s->client_version&0xff;
1346 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1347 goto err;
1348
1349 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1350
1351 q=p;
1352 /* Fix buf for TLS and beyond */
1353 if (s->version > SSL3_VERSION)
1354 p+=2;
1355 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1356 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1357#ifdef PKCS1_CHECK
1358 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1359 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1360#endif
1361 if (n <= 0)
1362 {
1363 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1364 goto err;
1365 }
1366
1367 /* Fix buf for TLS and beyond */
1368 if (s->version > SSL3_VERSION)
1369 {
1370 s2n(n,q);
1371 n+=2;
1372 }
1373
1374 s->session->master_key_length=
1375 s->method->ssl3_enc->generate_master_secret(s,
1376 s->session->master_key,
1377 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1378 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1379 }
1380 else
1381#endif
1382#ifndef NO_DH
1383 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1384 {
1385 DH *dh_srvr,*dh_clnt;
1386
1387 if (s->session->sess_cert->peer_dh_tmp != NULL)
1388 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1389 else
1390 {
1391 /* we get them from the cert */
1392 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1393 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1394 goto err;
1395 }
1396
1397 /* generate a new random key */
1398 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1399 {
1400 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1401 goto err;
1402 }
1403 if (!DH_generate_key(dh_clnt))
1404 {
1405 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1406 goto err;
1407 }
1408
1409 /* use the 'p' output buffer for the DH key, but
1410 * make sure to clear it out afterwards */
1411
1412 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1413
1414 if (n <= 0)
1415 {
1416 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1417 goto err;
1418 }
1419
1420 /* generate master key from the result */
1421 s->session->master_key_length=
1422 s->method->ssl3_enc->generate_master_secret(s,
1423 s->session->master_key,p,n);
1424 /* clean up */
1425 memset(p,0,n);
1426
1427 /* send off the data */
1428 n=BN_num_bytes(dh_clnt->pub_key);
1429 s2n(n,p);
1430 BN_bn2bin(dh_clnt->pub_key,p);
1431 n+=2;
1432
1433 DH_free(dh_clnt);
1434
1435 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1436 }
1437 else
1438#endif
1439 {
1440 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1441 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1442 goto err;
1443 }
1444
1445 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1446 l2n3(n,d);
1447
1448 s->state=SSL3_ST_CW_KEY_EXCH_B;
1449 /* number of bytes to write */
1450 s->init_num=n+4;
1451 s->init_off=0;
1452 }
1453
1454 /* SSL3_ST_CW_KEY_EXCH_B */
1455 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1456err:
1457 return(-1);
1458 }
1459
1460static int ssl3_send_client_verify(SSL *s)
1461 {
1462 unsigned char *p,*d;
1463 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1464 EVP_PKEY *pkey;
1465#ifndef NO_RSA
1466 unsigned u=0;
1467#endif
1468 unsigned long n;
1469#ifndef NO_DSA
1470 int j;
1471#endif
1472
1473 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1474 {
1475 d=(unsigned char *)s->init_buf->data;
1476 p= &(d[4]);
1477 pkey=s->cert->key->privatekey;
1478
1479 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1480 &(data[MD5_DIGEST_LENGTH]));
1481
1482#ifndef NO_RSA
1483 if (pkey->type == EVP_PKEY_RSA)
1484 {
1485 s->method->ssl3_enc->cert_verify_mac(s,
1486 &(s->s3->finish_dgst1),&(data[0]));
1487 if (RSA_sign(NID_md5_sha1, data,
1488 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1489 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1490 {
1491 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1492 goto err;
1493 }
1494 s2n(u,p);
1495 n=u+2;
1496 }
1497 else
1498#endif
1499#ifndef NO_DSA
1500 if (pkey->type == EVP_PKEY_DSA)
1501 {
1502 if (!DSA_sign(pkey->save_type,
1503 &(data[MD5_DIGEST_LENGTH]),
1504 SHA_DIGEST_LENGTH,&(p[2]),
1505 (unsigned int *)&j,pkey->pkey.dsa))
1506 {
1507 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1508 goto err;
1509 }
1510 s2n(j,p);
1511 n=j+2;
1512 }
1513 else
1514#endif
1515 {
1516 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1517 goto err;
1518 }
1519 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1520 l2n3(n,d);
1521
1522 s->init_num=(int)n+4;
1523 s->init_off=0;
1524 }
1525 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1526err:
1527 return(-1);
1528 }
1529
1530static int ssl3_send_client_certificate(SSL *s)
1531 {
1532 X509 *x509=NULL;
1533 EVP_PKEY *pkey=NULL;
1534 int i;
1535 unsigned long l;
1536
1537 if (s->state == SSL3_ST_CW_CERT_A)
1538 {
1539 if ((s->cert == NULL) ||
1540 (s->cert->key->x509 == NULL) ||
1541 (s->cert->key->privatekey == NULL))
1542 s->state=SSL3_ST_CW_CERT_B;
1543 else
1544 s->state=SSL3_ST_CW_CERT_C;
1545 }
1546
1547 /* We need to get a client cert */
1548 if (s->state == SSL3_ST_CW_CERT_B)
1549 {
1550 /* If we get an error, we need to
1551 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1552 * We then get retied later */
1553 i=0;
1554 if (s->ctx->client_cert_cb != NULL)
1555 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1556 if (i < 0)
1557 {
1558 s->rwstate=SSL_X509_LOOKUP;
1559 return(-1);
1560 }
1561 s->rwstate=SSL_NOTHING;
1562 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1563 {
1564 s->state=SSL3_ST_CW_CERT_B;
1565 if ( !SSL_use_certificate(s,x509) ||
1566 !SSL_use_PrivateKey(s,pkey))
1567 i=0;
1568 }
1569 else if (i == 1)
1570 {
1571 i=0;
1572 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1573 }
1574
1575 if (x509 != NULL) X509_free(x509);
1576 if (pkey != NULL) EVP_PKEY_free(pkey);
1577 if (i == 0)
1578 {
1579 if (s->version == SSL3_VERSION)
1580 {
1581 s->s3->tmp.cert_req=0;
1582 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1583 return(1);
1584 }
1585 else
1586 {
1587 s->s3->tmp.cert_req=2;
1588 }
1589 }
1590
1591 /* Ok, we have a cert */
1592 s->state=SSL3_ST_CW_CERT_C;
1593 }
1594
1595 if (s->state == SSL3_ST_CW_CERT_C)
1596 {
1597 s->state=SSL3_ST_CW_CERT_D;
1598 l=ssl3_output_cert_chain(s,
1599 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1600 s->init_num=(int)l;
1601 s->init_off=0;
1602 }
1603 /* SSL3_ST_CW_CERT_D */
1604 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1605 }
1606
1607#define has_bits(i,m) (((i)&(m)) == (m))
1608
1609static int ssl3_check_cert_and_algorithm(SSL *s)
1610 {
1611 int i,idx;
1612 long algs;
1613 EVP_PKEY *pkey=NULL;
1614 SESS_CERT *sc;
1615#ifndef NO_RSA
1616 RSA *rsa;
1617#endif
1618#ifndef NO_DH
1619 DH *dh;
1620#endif
1621
1622 sc=s->session->sess_cert;
1623
1624 if (sc == NULL)
1625 {
1626 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1627 goto err;
1628 }
1629
1630 algs=s->s3->tmp.new_cipher->algorithms;
1631
1632 /* we don't have a certificate */
1633 if (algs & (SSL_aDH|SSL_aNULL))
1634 return(1);
1635
1636#ifndef NO_RSA
1637 rsa=s->session->sess_cert->peer_rsa_tmp;
1638#endif
1639#ifndef NO_DH
1640 dh=s->session->sess_cert->peer_dh_tmp;
1641#endif
1642
1643 /* This is the passed certificate */
1644
1645 idx=sc->peer_cert_type;
1646 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1647 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1648 EVP_PKEY_free(pkey);
1649
1650
1651 /* Check that we have a certificate if we require one */
1652 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1653 {
1654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1655 goto f_err;
1656 }
1657#ifndef NO_DSA
1658 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1659 {
1660 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1661 goto f_err;
1662 }
1663#endif
1664#ifndef NO_RSA
1665 if ((algs & SSL_kRSA) &&
1666 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1667 {
1668 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1669 goto f_err;
1670 }
1671#endif
1672#ifndef NO_DH
1673 if ((algs & SSL_kEDH) &&
1674 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1675 {
1676 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1677 goto f_err;
1678 }
1679 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1680 {
1681 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1682 goto f_err;
1683 }
1684#ifndef NO_DSA
1685 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1686 {
1687 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1688 goto f_err;
1689 }
1690#endif
1691#endif
1692
1693 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1694 {
1695#ifndef NO_RSA
1696 if (algs & SSL_kRSA)
1697 {
1698 if (rsa == NULL
1699 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1700 {
1701 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1702 goto f_err;
1703 }
1704 }
1705 else
1706#endif
1707#ifndef NO_DH
1708 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1709 {
1710 if (dh == NULL
1711 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1712 {
1713 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1714 goto f_err;
1715 }
1716 }
1717 else
1718#endif
1719 {
1720 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1721 goto f_err;
1722 }
1723 }
1724 return(1);
1725f_err:
1726 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1727err:
1728 return(0);
1729 }
1730
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-03 18:05:08 +0000