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-rw-r--r--src/lib/libssl/s3_clnt.c1740
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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(const X509_NAME * const *a,const X509_NAME * const *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 {
146 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_INTERNAL_ERROR);
147 ret = -1;
148 goto end;
149 }
150
151 /* s->version=SSL3_VERSION; */
152 s->type=SSL_ST_CONNECT;
153
154 if (s->init_buf == NULL)
155 {
156 if ((buf=BUF_MEM_new()) == NULL)
157 {
158 ret= -1;
159 goto end;
160 }
161 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
162 {
163 ret= -1;
164 goto end;
165 }
166 s->init_buf=buf;
167 }
168
169 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
170
171 /* setup buffing BIO */
172 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
173
174 /* don't push the buffering BIO quite yet */
175
176 ssl3_init_finished_mac(s);
177
178 s->state=SSL3_ST_CW_CLNT_HELLO_A;
179 s->ctx->stats.sess_connect++;
180 s->init_num=0;
181 break;
182
183 case SSL3_ST_CW_CLNT_HELLO_A:
184 case SSL3_ST_CW_CLNT_HELLO_B:
185
186 s->shutdown=0;
187 ret=ssl3_client_hello(s);
188 if (ret <= 0) goto end;
189 s->state=SSL3_ST_CR_SRVR_HELLO_A;
190 s->init_num=0;
191
192 /* turn on buffering for the next lot of output */
193 if (s->bbio != s->wbio)
194 s->wbio=BIO_push(s->bbio,s->wbio);
195
196 break;
197
198 case SSL3_ST_CR_SRVR_HELLO_A:
199 case SSL3_ST_CR_SRVR_HELLO_B:
200 ret=ssl3_get_server_hello(s);
201 if (ret <= 0) goto end;
202 if (s->hit)
203 s->state=SSL3_ST_CR_FINISHED_A;
204 else
205 s->state=SSL3_ST_CR_CERT_A;
206 s->init_num=0;
207 break;
208
209 case SSL3_ST_CR_CERT_A:
210 case SSL3_ST_CR_CERT_B:
211 /* Check if it is anon DH */
212 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
213 {
214 ret=ssl3_get_server_certificate(s);
215 if (ret <= 0) goto end;
216 }
217 else
218 skip=1;
219 s->state=SSL3_ST_CR_KEY_EXCH_A;
220 s->init_num=0;
221 break;
222
223 case SSL3_ST_CR_KEY_EXCH_A:
224 case SSL3_ST_CR_KEY_EXCH_B:
225 ret=ssl3_get_key_exchange(s);
226 if (ret <= 0) goto end;
227 s->state=SSL3_ST_CR_CERT_REQ_A;
228 s->init_num=0;
229
230 /* at this point we check that we have the
231 * required stuff from the server */
232 if (!ssl3_check_cert_and_algorithm(s))
233 {
234 ret= -1;
235 goto end;
236 }
237 break;
238
239 case SSL3_ST_CR_CERT_REQ_A:
240 case SSL3_ST_CR_CERT_REQ_B:
241 ret=ssl3_get_certificate_request(s);
242 if (ret <= 0) goto end;
243 s->state=SSL3_ST_CR_SRVR_DONE_A;
244 s->init_num=0;
245 break;
246
247 case SSL3_ST_CR_SRVR_DONE_A:
248 case SSL3_ST_CR_SRVR_DONE_B:
249 ret=ssl3_get_server_done(s);
250 if (ret <= 0) goto end;
251 if (s->s3->tmp.cert_req)
252 s->state=SSL3_ST_CW_CERT_A;
253 else
254 s->state=SSL3_ST_CW_KEY_EXCH_A;
255 s->init_num=0;
256
257 break;
258
259 case SSL3_ST_CW_CERT_A:
260 case SSL3_ST_CW_CERT_B:
261 case SSL3_ST_CW_CERT_C:
262 case SSL3_ST_CW_CERT_D:
263 ret=ssl3_send_client_certificate(s);
264 if (ret <= 0) goto end;
265 s->state=SSL3_ST_CW_KEY_EXCH_A;
266 s->init_num=0;
267 break;
268
269 case SSL3_ST_CW_KEY_EXCH_A:
270 case SSL3_ST_CW_KEY_EXCH_B:
271 ret=ssl3_send_client_key_exchange(s);
272 if (ret <= 0) goto end;
273 l=s->s3->tmp.new_cipher->algorithms;
274 /* EAY EAY EAY need to check for DH fix cert
275 * sent back */
276 /* For TLS, cert_req is set to 2, so a cert chain
277 * of nothing is sent, but no verify packet is sent */
278 if (s->s3->tmp.cert_req == 1)
279 {
280 s->state=SSL3_ST_CW_CERT_VRFY_A;
281 }
282 else
283 {
284 s->state=SSL3_ST_CW_CHANGE_A;
285 s->s3->change_cipher_spec=0;
286 }
287
288 s->init_num=0;
289 break;
290
291 case SSL3_ST_CW_CERT_VRFY_A:
292 case SSL3_ST_CW_CERT_VRFY_B:
293 ret=ssl3_send_client_verify(s);
294 if (ret <= 0) goto end;
295 s->state=SSL3_ST_CW_CHANGE_A;
296 s->init_num=0;
297 s->s3->change_cipher_spec=0;
298 break;
299
300 case SSL3_ST_CW_CHANGE_A:
301 case SSL3_ST_CW_CHANGE_B:
302 ret=ssl3_send_change_cipher_spec(s,
303 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
304 if (ret <= 0) goto end;
305 s->state=SSL3_ST_CW_FINISHED_A;
306 s->init_num=0;
307
308 s->session->cipher=s->s3->tmp.new_cipher;
309 if (s->s3->tmp.new_compression == NULL)
310 s->session->compress_meth=0;
311 else
312 s->session->compress_meth=
313 s->s3->tmp.new_compression->id;
314 if (!s->method->ssl3_enc->setup_key_block(s))
315 {
316 ret= -1;
317 goto end;
318 }
319
320 if (!s->method->ssl3_enc->change_cipher_state(s,
321 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
322 {
323 ret= -1;
324 goto end;
325 }
326
327 break;
328
329 case SSL3_ST_CW_FINISHED_A:
330 case SSL3_ST_CW_FINISHED_B:
331 ret=ssl3_send_finished(s,
332 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
333 s->method->ssl3_enc->client_finished_label,
334 s->method->ssl3_enc->client_finished_label_len);
335 if (ret <= 0) goto end;
336 s->state=SSL3_ST_CW_FLUSH;
337
338 /* clear flags */
339 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
340 if (s->hit)
341 {
342 s->s3->tmp.next_state=SSL_ST_OK;
343 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
344 {
345 s->state=SSL_ST_OK;
346 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
347 s->s3->delay_buf_pop_ret=0;
348 }
349 }
350 else
351 {
352 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
353 }
354 s->init_num=0;
355 break;
356
357 case SSL3_ST_CR_FINISHED_A:
358 case SSL3_ST_CR_FINISHED_B:
359
360 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
361 SSL3_ST_CR_FINISHED_B);
362 if (ret <= 0) goto end;
363
364 if (s->hit)
365 s->state=SSL3_ST_CW_CHANGE_A;
366 else
367 s->state=SSL_ST_OK;
368 s->init_num=0;
369 break;
370
371 case SSL3_ST_CW_FLUSH:
372 /* number of bytes to be flushed */
373 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
374 if (num1 > 0)
375 {
376 s->rwstate=SSL_WRITING;
377 num1=BIO_flush(s->wbio);
378 if (num1 <= 0) { ret= -1; goto end; }
379 s->rwstate=SSL_NOTHING;
380 }
381
382 s->state=s->s3->tmp.next_state;
383 break;
384
385 case SSL_ST_OK:
386 /* clean a few things up */
387 ssl3_cleanup_key_block(s);
388
389 if (s->init_buf != NULL)
390 {
391 BUF_MEM_free(s->init_buf);
392 s->init_buf=NULL;
393 }
394
395 /* If we are not 'joining' the last two packets,
396 * remove the buffering now */
397 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
398 ssl_free_wbio_buffer(s);
399 /* else do it later in ssl3_write */
400
401 s->init_num=0;
402 s->new_session=0;
403
404 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
405 if (s->hit) s->ctx->stats.sess_hit++;
406
407 ret=1;
408 /* s->server=0; */
409 s->handshake_func=ssl3_connect;
410 s->ctx->stats.sess_connect_good++;
411
412 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
413
414 goto end;
415 /* break; */
416
417 default:
418 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
419 ret= -1;
420 goto end;
421 /* break; */
422 }
423
424 /* did we do anything */
425 if (!s->s3->tmp.reuse_message && !skip)
426 {
427 if (s->debug)
428 {
429 if ((ret=BIO_flush(s->wbio)) <= 0)
430 goto end;
431 }
432
433 if ((cb != NULL) && (s->state != state))
434 {
435 new_state=s->state;
436 s->state=state;
437 cb(s,SSL_CB_CONNECT_LOOP,1);
438 s->state=new_state;
439 }
440 }
441 skip=0;
442 }
443end:
444 if (cb != NULL)
445 cb(s,SSL_CB_CONNECT_EXIT,ret);
446 s->in_handshake--;
447 return(ret);
448 }
449
450
451static int ssl3_client_hello(SSL *s)
452 {
453 unsigned char *buf;
454 unsigned char *p,*d;
455 int i,j;
456 unsigned long Time,l;
457 SSL_COMP *comp;
458
459 buf=(unsigned char *)s->init_buf->data;
460 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
461 {
462 if ((s->session == NULL) ||
463 (s->session->ssl_version != s->version) ||
464 (s->session->not_resumable))
465 {
466 if (!ssl_get_new_session(s,0))
467 goto err;
468 }
469 /* else use the pre-loaded session */
470
471 p=s->s3->client_random;
472 Time=time(NULL); /* Time */
473 l2n(Time,p);
474 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
475
476 /* Do the message type and length last */
477 d=p= &(buf[4]);
478
479 *(p++)=s->version>>8;
480 *(p++)=s->version&0xff;
481 s->client_version=s->version;
482
483 /* Random stuff */
484 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
485 p+=SSL3_RANDOM_SIZE;
486
487 /* Session ID */
488 if (s->new_session)
489 i=0;
490 else
491 i=s->session->session_id_length;
492 *(p++)=i;
493 if (i != 0)
494 {
495 memcpy(p,s->session->session_id,i);
496 p+=i;
497 }
498
499 /* Ciphers supported */
500 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
501 if (i == 0)
502 {
503 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
504 goto err;
505 }
506 s2n(i,p);
507 p+=i;
508
509 /* COMPRESSION */
510 if (s->ctx->comp_methods == NULL)
511 j=0;
512 else
513 j=sk_SSL_COMP_num(s->ctx->comp_methods);
514 *(p++)=1+j;
515 for (i=0; i<j; i++)
516 {
517 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
518 *(p++)=comp->id;
519 }
520 *(p++)=0; /* Add the NULL method */
521
522 l=(p-d);
523 d=buf;
524 *(d++)=SSL3_MT_CLIENT_HELLO;
525 l2n3(l,d);
526
527 s->state=SSL3_ST_CW_CLNT_HELLO_B;
528 /* number of bytes to write */
529 s->init_num=p-buf;
530 s->init_off=0;
531 }
532
533 /* SSL3_ST_CW_CLNT_HELLO_B */
534 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
535err:
536 return(-1);
537 }
538
539static int ssl3_get_server_hello(SSL *s)
540 {
541 STACK_OF(SSL_CIPHER) *sk;
542 SSL_CIPHER *c;
543 unsigned char *p,*d;
544 int i,al,ok;
545 unsigned int j;
546 long n;
547 SSL_COMP *comp;
548
549 n=ssl3_get_message(s,
550 SSL3_ST_CR_SRVR_HELLO_A,
551 SSL3_ST_CR_SRVR_HELLO_B,
552 SSL3_MT_SERVER_HELLO,
553 300, /* ?? */
554 &ok);
555
556 if (!ok) return((int)n);
557 d=p=(unsigned char *)s->init_buf->data;
558
559 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
560 {
561 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
562 s->version=(s->version&0xff00)|p[1];
563 al=SSL_AD_PROTOCOL_VERSION;
564 goto f_err;
565 }
566 p+=2;
567
568 /* load the server hello data */
569 /* load the server random */
570 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
571 p+=SSL3_RANDOM_SIZE;
572
573 /* get the session-id */
574 j= *(p++);
575
576 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
577 {
578 /* SSLref returns 16 :-( */
579 if (j < SSL2_SSL_SESSION_ID_LENGTH)
580 {
581 al=SSL_AD_ILLEGAL_PARAMETER;
582 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
583 goto f_err;
584 }
585 }
586 if (j != 0 && j == s->session->session_id_length
587 && memcmp(p,s->session->session_id,j) == 0)
588 {
589 if(s->sid_ctx_length != s->session->sid_ctx_length
590 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
591 {
592 al=SSL_AD_ILLEGAL_PARAMETER;
593 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
594 goto f_err;
595 }
596 s->hit=1;
597 }
598 else /* a miss or crap from the other end */
599 {
600 /* If we were trying for session-id reuse, make a new
601 * SSL_SESSION so we don't stuff up other people */
602 s->hit=0;
603 if (s->session->session_id_length > 0)
604 {
605 if (!ssl_get_new_session(s,0))
606 {
607 al=SSL_AD_INTERNAL_ERROR;
608 goto f_err;
609 }
610 }
611 s->session->session_id_length=j;
612 memcpy(s->session->session_id,p,j); /* j could be 0 */
613 }
614 p+=j;
615 c=ssl_get_cipher_by_char(s,p);
616 if (c == NULL)
617 {
618 /* unknown cipher */
619 al=SSL_AD_ILLEGAL_PARAMETER;
620 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
621 goto f_err;
622 }
623 p+=ssl_put_cipher_by_char(s,NULL,NULL);
624
625 sk=ssl_get_ciphers_by_id(s);
626 i=sk_SSL_CIPHER_find(sk,c);
627 if (i < 0)
628 {
629 /* we did not say we would use this cipher */
630 al=SSL_AD_ILLEGAL_PARAMETER;
631 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
632 goto f_err;
633 }
634
635 if (s->hit && (s->session->cipher != c))
636 {
637 if (!(s->options &
638 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
639 {
640 al=SSL_AD_ILLEGAL_PARAMETER;
641 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
642 goto f_err;
643 }
644 }
645 s->s3->tmp.new_cipher=c;
646
647 /* lets get the compression algorithm */
648 /* COMPRESSION */
649 j= *(p++);
650 if (j == 0)
651 comp=NULL;
652 else
653 comp=ssl3_comp_find(s->ctx->comp_methods,j);
654
655 if ((j != 0) && (comp == NULL))
656 {
657 al=SSL_AD_ILLEGAL_PARAMETER;
658 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
659 goto f_err;
660 }
661 else
662 {
663 s->s3->tmp.new_compression=comp;
664 }
665
666 if (p != (d+n))
667 {
668 /* wrong packet length */
669 al=SSL_AD_DECODE_ERROR;
670 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
671 goto err;
672 }
673
674 return(1);
675f_err:
676 ssl3_send_alert(s,SSL3_AL_FATAL,al);
677err:
678 return(-1);
679 }
680
681static int ssl3_get_server_certificate(SSL *s)
682 {
683 int al,i,ok,ret= -1;
684 unsigned long n,nc,llen,l;
685 X509 *x=NULL;
686 unsigned char *p,*d,*q;
687 STACK_OF(X509) *sk=NULL;
688 SESS_CERT *sc;
689 EVP_PKEY *pkey=NULL;
690
691 n=ssl3_get_message(s,
692 SSL3_ST_CR_CERT_A,
693 SSL3_ST_CR_CERT_B,
694 -1,
695#if defined(MSDOS) && !defined(WIN32)
696 1024*30, /* 30k max cert list :-) */
697#else
698 1024*100, /* 100k max cert list :-) */
699#endif
700 &ok);
701
702 if (!ok) return((int)n);
703
704 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
705 {
706 s->s3->tmp.reuse_message=1;
707 return(1);
708 }
709
710 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
711 {
712 al=SSL_AD_UNEXPECTED_MESSAGE;
713 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
714 goto f_err;
715 }
716 d=p=(unsigned char *)s->init_buf->data;
717
718 if ((sk=sk_X509_new_null()) == NULL)
719 {
720 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
721 goto err;
722 }
723
724 n2l3(p,llen);
725 if (llen+3 != n)
726 {
727 al=SSL_AD_DECODE_ERROR;
728 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
729 goto f_err;
730 }
731 for (nc=0; nc<llen; )
732 {
733 n2l3(p,l);
734 if ((l+nc+3) > llen)
735 {
736 al=SSL_AD_DECODE_ERROR;
737 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
738 goto f_err;
739 }
740
741 q=p;
742 x=d2i_X509(NULL,&q,l);
743 if (x == NULL)
744 {
745 al=SSL_AD_BAD_CERTIFICATE;
746 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
747 goto f_err;
748 }
749 if (q != (p+l))
750 {
751 al=SSL_AD_DECODE_ERROR;
752 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
753 goto f_err;
754 }
755 if (!sk_X509_push(sk,x))
756 {
757 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
758 goto err;
759 }
760 x=NULL;
761 nc+=l+3;
762 p=q;
763 }
764
765 i=ssl_verify_cert_chain(s,sk);
766 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
767 {
768 al=ssl_verify_alarm_type(s->verify_result);
769 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
770 goto f_err;
771 }
772 ERR_clear_error(); /* but we keep s->verify_result */
773
774 sc=ssl_sess_cert_new();
775 if (sc == NULL) goto err;
776
777 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
778 s->session->sess_cert=sc;
779
780 sc->cert_chain=sk;
781 /* Inconsistency alert: cert_chain does include the peer's
782 * certificate, which we don't include in s3_srvr.c */
783 x=sk_X509_value(sk,0);
784 sk=NULL;
785
786 pkey=X509_get_pubkey(x);
787
788 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
789 {
790 x=NULL;
791 al=SSL3_AL_FATAL;
792 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
793 goto f_err;
794 }
795
796 i=ssl_cert_type(x,pkey);
797 if (i < 0)
798 {
799 x=NULL;
800 al=SSL3_AL_FATAL;
801 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
802 goto f_err;
803 }
804
805 sc->peer_cert_type=i;
806 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
807 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
808 * We just created sc a couple of
809 * lines ago. */
810 X509_free(sc->peer_pkeys[i].x509);
811 sc->peer_pkeys[i].x509=x;
812 sc->peer_key= &(sc->peer_pkeys[i]);
813
814 if (s->session->peer != NULL)
815 X509_free(s->session->peer);
816 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
817 s->session->peer=x;
818
819 x=NULL;
820 ret=1;
821
822 if (0)
823 {
824f_err:
825 ssl3_send_alert(s,SSL3_AL_FATAL,al);
826 }
827err:
828 EVP_PKEY_free(pkey);
829 X509_free(x);
830 sk_X509_pop_free(sk,X509_free);
831 return(ret);
832 }
833
834static int ssl3_get_key_exchange(SSL *s)
835 {
836#ifndef NO_RSA
837 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
838#endif
839 EVP_MD_CTX md_ctx;
840 unsigned char *param,*p;
841 int al,i,j,param_len,ok;
842 long n,alg;
843 EVP_PKEY *pkey=NULL;
844#ifndef NO_RSA
845 RSA *rsa=NULL;
846#endif
847#ifndef NO_DH
848 DH *dh=NULL;
849#endif
850
851 n=ssl3_get_message(s,
852 SSL3_ST_CR_KEY_EXCH_A,
853 SSL3_ST_CR_KEY_EXCH_B,
854 -1,
855 1024*8, /* ?? */
856 &ok);
857
858 if (!ok) return((int)n);
859
860 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
861 {
862 s->s3->tmp.reuse_message=1;
863 return(1);
864 }
865
866 param=p=(unsigned char *)s->init_buf->data;
867
868 if (s->session->sess_cert != NULL)
869 {
870#ifndef NO_RSA
871 if (s->session->sess_cert->peer_rsa_tmp != NULL)
872 {
873 RSA_free(s->session->sess_cert->peer_rsa_tmp);
874 s->session->sess_cert->peer_rsa_tmp=NULL;
875 }
876#endif
877#ifndef NO_DH
878 if (s->session->sess_cert->peer_dh_tmp)
879 {
880 DH_free(s->session->sess_cert->peer_dh_tmp);
881 s->session->sess_cert->peer_dh_tmp=NULL;
882 }
883#endif
884 }
885 else
886 {
887 s->session->sess_cert=ssl_sess_cert_new();
888 }
889
890 param_len=0;
891 alg=s->s3->tmp.new_cipher->algorithms;
892
893#ifndef NO_RSA
894 if (alg & SSL_kRSA)
895 {
896 if ((rsa=RSA_new()) == NULL)
897 {
898 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
899 goto err;
900 }
901 n2s(p,i);
902 param_len=i+2;
903 if (param_len > n)
904 {
905 al=SSL_AD_DECODE_ERROR;
906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
907 goto f_err;
908 }
909 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
910 {
911 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
912 goto err;
913 }
914 p+=i;
915
916 n2s(p,i);
917 param_len+=i+2;
918 if (param_len > n)
919 {
920 al=SSL_AD_DECODE_ERROR;
921 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
922 goto f_err;
923 }
924 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
925 {
926 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
927 goto err;
928 }
929 p+=i;
930 n-=param_len;
931
932 /* this should be because we are using an export cipher */
933 if (alg & SSL_aRSA)
934 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
935 else
936 {
937 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
938 goto err;
939 }
940 s->session->sess_cert->peer_rsa_tmp=rsa;
941 rsa=NULL;
942 }
943#else /* NO_RSA */
944 if (0)
945 ;
946#endif
947#ifndef NO_DH
948 else if (alg & SSL_kEDH)
949 {
950 if ((dh=DH_new()) == NULL)
951 {
952 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
953 goto err;
954 }
955 n2s(p,i);
956 param_len=i+2;
957 if (param_len > n)
958 {
959 al=SSL_AD_DECODE_ERROR;
960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
961 goto f_err;
962 }
963 if (!(dh->p=BN_bin2bn(p,i,NULL)))
964 {
965 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
966 goto err;
967 }
968 p+=i;
969
970 n2s(p,i);
971 param_len+=i+2;
972 if (param_len > n)
973 {
974 al=SSL_AD_DECODE_ERROR;
975 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
976 goto f_err;
977 }
978 if (!(dh->g=BN_bin2bn(p,i,NULL)))
979 {
980 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
981 goto err;
982 }
983 p+=i;
984
985 n2s(p,i);
986 param_len+=i+2;
987 if (param_len > n)
988 {
989 al=SSL_AD_DECODE_ERROR;
990 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
991 goto f_err;
992 }
993 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
994 {
995 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
996 goto err;
997 }
998 p+=i;
999 n-=param_len;
1000
1001#ifndef NO_RSA
1002 if (alg & SSL_aRSA)
1003 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1004#else
1005 if (0)
1006 ;
1007#endif
1008#ifndef NO_DSA
1009 else if (alg & SSL_aDSS)
1010 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1011#endif
1012 /* else anonymous DH, so no certificate or pkey. */
1013
1014 s->session->sess_cert->peer_dh_tmp=dh;
1015 dh=NULL;
1016 }
1017 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1018 {
1019 al=SSL_AD_ILLEGAL_PARAMETER;
1020 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1021 goto f_err;
1022 }
1023#endif /* !NO_DH */
1024 if (alg & SSL_aFZA)
1025 {
1026 al=SSL_AD_HANDSHAKE_FAILURE;
1027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1028 goto f_err;
1029 }
1030
1031
1032 /* p points to the next byte, there are 'n' bytes left */
1033
1034
1035 /* if it was signed, check the signature */
1036 if (pkey != NULL)
1037 {
1038 n2s(p,i);
1039 n-=2;
1040 j=EVP_PKEY_size(pkey);
1041
1042 if ((i != n) || (n > j) || (n <= 0))
1043 {
1044 /* wrong packet length */
1045 al=SSL_AD_DECODE_ERROR;
1046 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1047 goto f_err;
1048 }
1049
1050#ifndef NO_RSA
1051 if (pkey->type == EVP_PKEY_RSA)
1052 {
1053 int num;
1054
1055 j=0;
1056 q=md_buf;
1057 for (num=2; num > 0; num--)
1058 {
1059 EVP_DigestInit(&md_ctx,(num == 2)
1060 ?s->ctx->md5:s->ctx->sha1);
1061 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1062 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_DigestUpdate(&md_ctx,param,param_len);
1064 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1065 q+=i;
1066 j+=i;
1067 }
1068 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1069 pkey->pkey.rsa);
1070 if (i < 0)
1071 {
1072 al=SSL_AD_DECRYPT_ERROR;
1073 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1074 goto f_err;
1075 }
1076 if (i == 0)
1077 {
1078 /* bad signature */
1079 al=SSL_AD_DECRYPT_ERROR;
1080 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1081 goto f_err;
1082 }
1083 }
1084 else
1085#endif
1086#ifndef NO_DSA
1087 if (pkey->type == EVP_PKEY_DSA)
1088 {
1089 /* lets do DSS */
1090 EVP_VerifyInit(&md_ctx,EVP_dss1());
1091 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1092 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1093 EVP_VerifyUpdate(&md_ctx,param,param_len);
1094 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1095 {
1096 /* bad signature */
1097 al=SSL_AD_DECRYPT_ERROR;
1098 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1099 goto f_err;
1100 }
1101 }
1102 else
1103#endif
1104 {
1105 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1106 goto err;
1107 }
1108 }
1109 else
1110 {
1111 /* still data left over */
1112 if (!(alg & SSL_aNULL))
1113 {
1114 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1115 goto err;
1116 }
1117 if (n != 0)
1118 {
1119 al=SSL_AD_DECODE_ERROR;
1120 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1121 goto f_err;
1122 }
1123 }
1124 EVP_PKEY_free(pkey);
1125 return(1);
1126f_err:
1127 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1128err:
1129 EVP_PKEY_free(pkey);
1130#ifndef NO_RSA
1131 if (rsa != NULL)
1132 RSA_free(rsa);
1133#endif
1134#ifndef NO_DH
1135 if (dh != NULL)
1136 DH_free(dh);
1137#endif
1138 return(-1);
1139 }
1140
1141static int ssl3_get_certificate_request(SSL *s)
1142 {
1143 int ok,ret=0;
1144 unsigned long n,nc,l;
1145 unsigned int llen,ctype_num,i;
1146 X509_NAME *xn=NULL;
1147 unsigned char *p,*d,*q;
1148 STACK_OF(X509_NAME) *ca_sk=NULL;
1149
1150 n=ssl3_get_message(s,
1151 SSL3_ST_CR_CERT_REQ_A,
1152 SSL3_ST_CR_CERT_REQ_B,
1153 -1,
1154#if defined(MSDOS) && !defined(WIN32)
1155 1024*30, /* 30k max cert list :-) */
1156#else
1157 1024*100, /* 100k max cert list :-) */
1158#endif
1159 &ok);
1160
1161 if (!ok) return((int)n);
1162
1163 s->s3->tmp.cert_req=0;
1164
1165 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1166 {
1167 s->s3->tmp.reuse_message=1;
1168 return(1);
1169 }
1170
1171 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1172 {
1173 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1174 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1175 goto err;
1176 }
1177
1178 /* TLS does not like anon-DH with client cert */
1179 if (s->version > SSL3_VERSION)
1180 {
1181 l=s->s3->tmp.new_cipher->algorithms;
1182 if (l & SSL_aNULL)
1183 {
1184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1186 goto err;
1187 }
1188 }
1189
1190 d=p=(unsigned char *)s->init_buf->data;
1191
1192 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1193 {
1194 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1195 goto err;
1196 }
1197
1198 /* get the certificate types */
1199 ctype_num= *(p++);
1200 if (ctype_num > SSL3_CT_NUMBER)
1201 ctype_num=SSL3_CT_NUMBER;
1202 for (i=0; i<ctype_num; i++)
1203 s->s3->tmp.ctype[i]= p[i];
1204 p+=ctype_num;
1205
1206 /* get the CA RDNs */
1207 n2s(p,llen);
1208#if 0
1209{
1210FILE *out;
1211out=fopen("/tmp/vsign.der","w");
1212fwrite(p,1,llen,out);
1213fclose(out);
1214}
1215#endif
1216
1217 if ((llen+ctype_num+2+1) != n)
1218 {
1219 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1220 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1221 goto err;
1222 }
1223
1224 for (nc=0; nc<llen; )
1225 {
1226 n2s(p,l);
1227 if ((l+nc+2) > llen)
1228 {
1229 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1230 goto cont; /* netscape bugs */
1231 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1232 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1233 goto err;
1234 }
1235
1236 q=p;
1237
1238 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1239 {
1240 /* If netscape tolerance is on, ignore errors */
1241 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1242 goto cont;
1243 else
1244 {
1245 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1246 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1247 goto err;
1248 }
1249 }
1250
1251 if (q != (p+l))
1252 {
1253 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1254 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1255 goto err;
1256 }
1257 if (!sk_X509_NAME_push(ca_sk,xn))
1258 {
1259 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1260 goto err;
1261 }
1262
1263 p+=l;
1264 nc+=l+2;
1265 }
1266
1267 if (0)
1268 {
1269cont:
1270 ERR_clear_error();
1271 }
1272
1273 /* we should setup a certificate to return.... */
1274 s->s3->tmp.cert_req=1;
1275 s->s3->tmp.ctype_num=ctype_num;
1276 if (s->s3->tmp.ca_names != NULL)
1277 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1278 s->s3->tmp.ca_names=ca_sk;
1279 ca_sk=NULL;
1280
1281 ret=1;
1282err:
1283 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1284 return(ret);
1285 }
1286
1287static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1288 {
1289 return(X509_NAME_cmp(*a,*b));
1290 }
1291
1292static int ssl3_get_server_done(SSL *s)
1293 {
1294 int ok,ret=0;
1295 long n;
1296
1297 n=ssl3_get_message(s,
1298 SSL3_ST_CR_SRVR_DONE_A,
1299 SSL3_ST_CR_SRVR_DONE_B,
1300 SSL3_MT_SERVER_DONE,
1301 30, /* should be very small, like 0 :-) */
1302 &ok);
1303
1304 if (!ok) return((int)n);
1305 if (n > 0)
1306 {
1307 /* should contain no data */
1308 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1309 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1310 }
1311 ret=1;
1312 return(ret);
1313 }
1314
1315static int ssl3_send_client_key_exchange(SSL *s)
1316 {
1317 unsigned char *p,*d;
1318 int n;
1319 unsigned long l;
1320#ifndef NO_RSA
1321 unsigned char *q;
1322 EVP_PKEY *pkey=NULL;
1323#endif
1324
1325 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1326 {
1327 d=(unsigned char *)s->init_buf->data;
1328 p= &(d[4]);
1329
1330 l=s->s3->tmp.new_cipher->algorithms;
1331
1332#ifndef NO_RSA
1333 if (l & SSL_kRSA)
1334 {
1335 RSA *rsa;
1336 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1337
1338 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1339 rsa=s->session->sess_cert->peer_rsa_tmp;
1340 else
1341 {
1342 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1343 if ((pkey == NULL) ||
1344 (pkey->type != EVP_PKEY_RSA) ||
1345 (pkey->pkey.rsa == NULL))
1346 {
1347 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1348 goto err;
1349 }
1350 rsa=pkey->pkey.rsa;
1351 EVP_PKEY_free(pkey);
1352 }
1353
1354 tmp_buf[0]=s->client_version>>8;
1355 tmp_buf[1]=s->client_version&0xff;
1356 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1357 goto err;
1358
1359 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1360
1361 q=p;
1362 /* Fix buf for TLS and beyond */
1363 if (s->version > SSL3_VERSION)
1364 p+=2;
1365 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1366 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1367#ifdef PKCS1_CHECK
1368 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1369 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1370#endif
1371 if (n <= 0)
1372 {
1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1374 goto err;
1375 }
1376
1377 /* Fix buf for TLS and beyond */
1378 if (s->version > SSL3_VERSION)
1379 {
1380 s2n(n,q);
1381 n+=2;
1382 }
1383
1384 s->session->master_key_length=
1385 s->method->ssl3_enc->generate_master_secret(s,
1386 s->session->master_key,
1387 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1388 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1389 }
1390 else
1391#endif
1392#ifndef NO_DH
1393 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1394 {
1395 DH *dh_srvr,*dh_clnt;
1396
1397 if (s->session->sess_cert->peer_dh_tmp != NULL)
1398 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1399 else
1400 {
1401 /* we get them from the cert */
1402 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1403 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1404 goto err;
1405 }
1406
1407 /* generate a new random key */
1408 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1409 {
1410 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1411 goto err;
1412 }
1413 if (!DH_generate_key(dh_clnt))
1414 {
1415 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1416 goto err;
1417 }
1418
1419 /* use the 'p' output buffer for the DH key, but
1420 * make sure to clear it out afterwards */
1421
1422 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1423
1424 if (n <= 0)
1425 {
1426 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1427 goto err;
1428 }
1429
1430 /* generate master key from the result */
1431 s->session->master_key_length=
1432 s->method->ssl3_enc->generate_master_secret(s,
1433 s->session->master_key,p,n);
1434 /* clean up */
1435 memset(p,0,n);
1436
1437 /* send off the data */
1438 n=BN_num_bytes(dh_clnt->pub_key);
1439 s2n(n,p);
1440 BN_bn2bin(dh_clnt->pub_key,p);
1441 n+=2;
1442
1443 DH_free(dh_clnt);
1444
1445 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1446 }
1447 else
1448#endif
1449 {
1450 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1451 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1452 goto err;
1453 }
1454
1455 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1456 l2n3(n,d);
1457
1458 s->state=SSL3_ST_CW_KEY_EXCH_B;
1459 /* number of bytes to write */
1460 s->init_num=n+4;
1461 s->init_off=0;
1462 }
1463
1464 /* SSL3_ST_CW_KEY_EXCH_B */
1465 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1466err:
1467 return(-1);
1468 }
1469
1470static int ssl3_send_client_verify(SSL *s)
1471 {
1472 unsigned char *p,*d;
1473 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1474 EVP_PKEY *pkey;
1475#ifndef NO_RSA
1476 unsigned u=0;
1477#endif
1478 unsigned long n;
1479#ifndef NO_DSA
1480 int j;
1481#endif
1482
1483 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1484 {
1485 d=(unsigned char *)s->init_buf->data;
1486 p= &(d[4]);
1487 pkey=s->cert->key->privatekey;
1488
1489 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1490 &(data[MD5_DIGEST_LENGTH]));
1491
1492#ifndef NO_RSA
1493 if (pkey->type == EVP_PKEY_RSA)
1494 {
1495 s->method->ssl3_enc->cert_verify_mac(s,
1496 &(s->s3->finish_dgst1),&(data[0]));
1497 if (RSA_sign(NID_md5_sha1, data,
1498 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1499 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1500 {
1501 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1502 goto err;
1503 }
1504 s2n(u,p);
1505 n=u+2;
1506 }
1507 else
1508#endif
1509#ifndef NO_DSA
1510 if (pkey->type == EVP_PKEY_DSA)
1511 {
1512 if (!DSA_sign(pkey->save_type,
1513 &(data[MD5_DIGEST_LENGTH]),
1514 SHA_DIGEST_LENGTH,&(p[2]),
1515 (unsigned int *)&j,pkey->pkey.dsa))
1516 {
1517 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1518 goto err;
1519 }
1520 s2n(j,p);
1521 n=j+2;
1522 }
1523 else
1524#endif
1525 {
1526 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1527 goto err;
1528 }
1529 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1530 l2n3(n,d);
1531
1532 s->init_num=(int)n+4;
1533 s->init_off=0;
1534 }
1535 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1536err:
1537 return(-1);
1538 }
1539
1540static int ssl3_send_client_certificate(SSL *s)
1541 {
1542 X509 *x509=NULL;
1543 EVP_PKEY *pkey=NULL;
1544 int i;
1545 unsigned long l;
1546
1547 if (s->state == SSL3_ST_CW_CERT_A)
1548 {
1549 if ((s->cert == NULL) ||
1550 (s->cert->key->x509 == NULL) ||
1551 (s->cert->key->privatekey == NULL))
1552 s->state=SSL3_ST_CW_CERT_B;
1553 else
1554 s->state=SSL3_ST_CW_CERT_C;
1555 }
1556
1557 /* We need to get a client cert */
1558 if (s->state == SSL3_ST_CW_CERT_B)
1559 {
1560 /* If we get an error, we need to
1561 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1562 * We then get retied later */
1563 i=0;
1564 if (s->ctx->client_cert_cb != NULL)
1565 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1566 if (i < 0)
1567 {
1568 s->rwstate=SSL_X509_LOOKUP;
1569 return(-1);
1570 }
1571 s->rwstate=SSL_NOTHING;
1572 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1573 {
1574 s->state=SSL3_ST_CW_CERT_B;
1575 if ( !SSL_use_certificate(s,x509) ||
1576 !SSL_use_PrivateKey(s,pkey))
1577 i=0;
1578 }
1579 else if (i == 1)
1580 {
1581 i=0;
1582 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1583 }
1584
1585 if (x509 != NULL) X509_free(x509);
1586 if (pkey != NULL) EVP_PKEY_free(pkey);
1587 if (i == 0)
1588 {
1589 if (s->version == SSL3_VERSION)
1590 {
1591 s->s3->tmp.cert_req=0;
1592 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1593 return(1);
1594 }
1595 else
1596 {
1597 s->s3->tmp.cert_req=2;
1598 }
1599 }
1600
1601 /* Ok, we have a cert */
1602 s->state=SSL3_ST_CW_CERT_C;
1603 }
1604
1605 if (s->state == SSL3_ST_CW_CERT_C)
1606 {
1607 s->state=SSL3_ST_CW_CERT_D;
1608 l=ssl3_output_cert_chain(s,
1609 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1610 s->init_num=(int)l;
1611 s->init_off=0;
1612 }
1613 /* SSL3_ST_CW_CERT_D */
1614 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1615 }
1616
1617#define has_bits(i,m) (((i)&(m)) == (m))
1618
1619static int ssl3_check_cert_and_algorithm(SSL *s)
1620 {
1621 int i,idx;
1622 long algs;
1623 EVP_PKEY *pkey=NULL;
1624 SESS_CERT *sc;
1625#ifndef NO_RSA
1626 RSA *rsa;
1627#endif
1628#ifndef NO_DH
1629 DH *dh;
1630#endif
1631
1632 sc=s->session->sess_cert;
1633
1634 if (sc == NULL)
1635 {
1636 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1637 goto err;
1638 }
1639
1640 algs=s->s3->tmp.new_cipher->algorithms;
1641
1642 /* we don't have a certificate */
1643 if (algs & (SSL_aDH|SSL_aNULL))
1644 return(1);
1645
1646#ifndef NO_RSA
1647 rsa=s->session->sess_cert->peer_rsa_tmp;
1648#endif
1649#ifndef NO_DH
1650 dh=s->session->sess_cert->peer_dh_tmp;
1651#endif
1652
1653 /* This is the passed certificate */
1654
1655 idx=sc->peer_cert_type;
1656 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1657 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1658 EVP_PKEY_free(pkey);
1659
1660
1661 /* Check that we have a certificate if we require one */
1662 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1663 {
1664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1665 goto f_err;
1666 }
1667#ifndef NO_DSA
1668 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1669 {
1670 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1671 goto f_err;
1672 }
1673#endif
1674#ifndef NO_RSA
1675 if ((algs & SSL_kRSA) &&
1676 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1677 {
1678 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1679 goto f_err;
1680 }
1681#endif
1682#ifndef NO_DH
1683 if ((algs & SSL_kEDH) &&
1684 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1685 {
1686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1687 goto f_err;
1688 }
1689 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1690 {
1691 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1692 goto f_err;
1693 }
1694#ifndef NO_DSA
1695 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1696 {
1697 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1698 goto f_err;
1699 }
1700#endif
1701#endif
1702
1703 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1704 {
1705#ifndef NO_RSA
1706 if (algs & SSL_kRSA)
1707 {
1708 if (rsa == NULL
1709 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1710 {
1711 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1712 goto f_err;
1713 }
1714 }
1715 else
1716#endif
1717#ifndef NO_DH
1718 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1719 {
1720 if (dh == NULL
1721 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1722 {
1723 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1724 goto f_err;
1725 }
1726 }
1727 else
1728#endif
1729 {
1730 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1731 goto f_err;
1732 }
1733 }
1734 return(1);
1735f_err:
1736 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1737err:
1738 return(0);
1739 }
1740
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 19:15:47 +0000