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-rw-r--r--src/lib/libssl/s3_clnt.c1729
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diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
deleted file mode 100644
index d3e6b4d1e5..0000000000
--- a/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_seed(&Time,sizeof(Time));
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,
329 s->method->ssl3_enc->client_finished_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_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 x=sk_X509_value(sk,0);
776 sk=NULL;
777
778 pkey=X509_get_pubkey(x);
779
780 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
781 {
782 x=NULL;
783 al=SSL3_AL_FATAL;
784 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
785 goto f_err;
786 }
787
788 i=ssl_cert_type(x,pkey);
789 if (i < 0)
790 {
791 x=NULL;
792 al=SSL3_AL_FATAL;
793 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
794 goto f_err;
795 }
796
797 sc->peer_cert_type=i;
798 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
799 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
800 * We just created sc a couple of
801 * lines ago. */
802 X509_free(sc->peer_pkeys[i].x509);
803 sc->peer_pkeys[i].x509=x;
804 sc->peer_key= &(sc->peer_pkeys[i]);
805
806 if (s->session->peer != NULL)
807 X509_free(s->session->peer);
808 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
809 s->session->peer=x;
810
811 x=NULL;
812 ret=1;
813
814 if (0)
815 {
816f_err:
817 ssl3_send_alert(s,SSL3_AL_FATAL,al);
818 }
819err:
820 EVP_PKEY_free(pkey);
821 X509_free(x);
822 sk_X509_pop_free(sk,X509_free);
823 return(ret);
824 }
825
826static int ssl3_get_key_exchange(SSL *s)
827 {
828#ifndef NO_RSA
829 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
830#endif
831 EVP_MD_CTX md_ctx;
832 unsigned char *param,*p;
833 int al,i,j,param_len,ok;
834 long n,alg;
835 EVP_PKEY *pkey=NULL;
836#ifndef NO_RSA
837 RSA *rsa=NULL;
838#endif
839#ifndef NO_DH
840 DH *dh=NULL;
841#endif
842
843 n=ssl3_get_message(s,
844 SSL3_ST_CR_KEY_EXCH_A,
845 SSL3_ST_CR_KEY_EXCH_B,
846 -1,
847 1024*8, /* ?? */
848 &ok);
849
850 if (!ok) return((int)n);
851
852 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
853 {
854 s->s3->tmp.reuse_message=1;
855 return(1);
856 }
857
858 param=p=(unsigned char *)s->init_buf->data;
859
860 if (s->session->sess_cert != NULL)
861 {
862#ifndef NO_RSA
863 if (s->session->sess_cert->peer_rsa_tmp != NULL)
864 {
865 RSA_free(s->session->sess_cert->peer_rsa_tmp);
866 s->session->sess_cert->peer_rsa_tmp=NULL;
867 }
868#endif
869#ifndef NO_DH
870 if (s->session->sess_cert->peer_dh_tmp)
871 {
872 DH_free(s->session->sess_cert->peer_dh_tmp);
873 s->session->sess_cert->peer_dh_tmp=NULL;
874 }
875#endif
876 }
877 else
878 {
879 s->session->sess_cert=ssl_sess_cert_new();
880 }
881
882 param_len=0;
883 alg=s->s3->tmp.new_cipher->algorithms;
884
885#ifndef NO_RSA
886 if (alg & SSL_kRSA)
887 {
888 if ((rsa=RSA_new()) == NULL)
889 {
890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
891 goto err;
892 }
893 n2s(p,i);
894 param_len=i+2;
895 if (param_len > n)
896 {
897 al=SSL_AD_DECODE_ERROR;
898 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
899 goto f_err;
900 }
901 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
902 {
903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
904 goto err;
905 }
906 p+=i;
907
908 n2s(p,i);
909 param_len+=i+2;
910 if (param_len > n)
911 {
912 al=SSL_AD_DECODE_ERROR;
913 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
914 goto f_err;
915 }
916 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
917 {
918 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
919 goto err;
920 }
921 p+=i;
922 n-=param_len;
923
924 /* this should be because we are using an export cipher */
925 if (alg & SSL_aRSA)
926 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
927 else
928 {
929 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
930 goto err;
931 }
932 s->session->sess_cert->peer_rsa_tmp=rsa;
933 rsa=NULL;
934 }
935 else
936#endif
937#ifndef NO_DH
938 if (alg & SSL_kEDH)
939 {
940 if ((dh=DH_new()) == NULL)
941 {
942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
943 goto err;
944 }
945 n2s(p,i);
946 param_len=i+2;
947 if (param_len > n)
948 {
949 al=SSL_AD_DECODE_ERROR;
950 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
951 goto f_err;
952 }
953 if (!(dh->p=BN_bin2bn(p,i,NULL)))
954 {
955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
956 goto err;
957 }
958 p+=i;
959
960 n2s(p,i);
961 param_len+=i+2;
962 if (param_len > n)
963 {
964 al=SSL_AD_DECODE_ERROR;
965 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
966 goto f_err;
967 }
968 if (!(dh->g=BN_bin2bn(p,i,NULL)))
969 {
970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
971 goto err;
972 }
973 p+=i;
974
975 n2s(p,i);
976 param_len+=i+2;
977 if (param_len > n)
978 {
979 al=SSL_AD_DECODE_ERROR;
980 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
981 goto f_err;
982 }
983 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
984 {
985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
986 goto err;
987 }
988 p+=i;
989 n-=param_len;
990
991#ifndef NO_RSA
992 if (alg & SSL_aRSA)
993 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
994 else
995#endif
996#ifndef NO_DSA
997 if (alg & SSL_aDSS)
998 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
999#endif
1000 /* else anonymous DH, so no certificate or pkey. */
1001
1002 s->session->sess_cert->peer_dh_tmp=dh;
1003 dh=NULL;
1004 }
1005 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1006 {
1007 al=SSL_AD_ILLEGAL_PARAMETER;
1008 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1009 goto f_err;
1010 }
1011#endif
1012 if (alg & SSL_aFZA)
1013 {
1014 al=SSL_AD_HANDSHAKE_FAILURE;
1015 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1016 goto f_err;
1017 }
1018
1019
1020 /* p points to the next byte, there are 'n' bytes left */
1021
1022
1023 /* if it was signed, check the signature */
1024 if (pkey != NULL)
1025 {
1026 n2s(p,i);
1027 n-=2;
1028 j=EVP_PKEY_size(pkey);
1029
1030 if ((i != n) || (n > j) || (n <= 0))
1031 {
1032 /* wrong packet length */
1033 al=SSL_AD_DECODE_ERROR;
1034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1035 goto f_err;
1036 }
1037
1038#ifndef NO_RSA
1039 if (pkey->type == EVP_PKEY_RSA)
1040 {
1041 int num;
1042
1043 j=0;
1044 q=md_buf;
1045 for (num=2; num > 0; num--)
1046 {
1047 EVP_DigestInit(&md_ctx,(num == 2)
1048 ?s->ctx->md5:s->ctx->sha1);
1049 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1050 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1051 EVP_DigestUpdate(&md_ctx,param,param_len);
1052 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1053 q+=i;
1054 j+=i;
1055 }
1056 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1057 RSA_PKCS1_PADDING);
1058 if (i <= 0)
1059 {
1060 al=SSL_AD_DECRYPT_ERROR;
1061 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1062 goto f_err;
1063 }
1064 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1065 {
1066 /* bad signature */
1067 al=SSL_AD_DECRYPT_ERROR;
1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1069 goto f_err;
1070 }
1071 }
1072 else
1073#endif
1074#ifndef NO_DSA
1075 if (pkey->type == EVP_PKEY_DSA)
1076 {
1077 /* lets do DSS */
1078 EVP_VerifyInit(&md_ctx,EVP_dss1());
1079 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1080 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1081 EVP_VerifyUpdate(&md_ctx,param,param_len);
1082 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1083 {
1084 /* bad signature */
1085 al=SSL_AD_DECRYPT_ERROR;
1086 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1087 goto f_err;
1088 }
1089 }
1090 else
1091#endif
1092 {
1093 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1094 goto err;
1095 }
1096 }
1097 else
1098 {
1099 /* still data left over */
1100 if (!(alg & SSL_aNULL))
1101 {
1102 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1103 goto err;
1104 }
1105 if (n != 0)
1106 {
1107 al=SSL_AD_DECODE_ERROR;
1108 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1109 goto f_err;
1110 }
1111 }
1112 EVP_PKEY_free(pkey);
1113 return(1);
1114f_err:
1115 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1116err:
1117 EVP_PKEY_free(pkey);
1118#ifndef NO_RSA
1119 if (rsa != NULL)
1120 RSA_free(rsa);
1121#endif
1122#ifndef NO_DH
1123 if (dh != NULL)
1124 DH_free(dh);
1125#endif
1126 return(-1);
1127 }
1128
1129static int ssl3_get_certificate_request(SSL *s)
1130 {
1131 int ok,ret=0;
1132 unsigned long n,nc,l;
1133 unsigned int llen,ctype_num,i;
1134 X509_NAME *xn=NULL;
1135 unsigned char *p,*d,*q;
1136 STACK_OF(X509_NAME) *ca_sk=NULL;
1137
1138 n=ssl3_get_message(s,
1139 SSL3_ST_CR_CERT_REQ_A,
1140 SSL3_ST_CR_CERT_REQ_B,
1141 -1,
1142#if defined(MSDOS) && !defined(WIN32)
1143 1024*30, /* 30k max cert list :-) */
1144#else
1145 1024*100, /* 100k max cert list :-) */
1146#endif
1147 &ok);
1148
1149 if (!ok) return((int)n);
1150
1151 s->s3->tmp.cert_req=0;
1152
1153 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1154 {
1155 s->s3->tmp.reuse_message=1;
1156 return(1);
1157 }
1158
1159 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1160 {
1161 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1162 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1163 goto err;
1164 }
1165
1166 /* TLS does not like anon-DH with client cert */
1167 if (s->version > SSL3_VERSION)
1168 {
1169 l=s->s3->tmp.new_cipher->algorithms;
1170 if (l & SSL_aNULL)
1171 {
1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1174 goto err;
1175 }
1176 }
1177
1178 d=p=(unsigned char *)s->init_buf->data;
1179
1180 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1181 {
1182 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1183 goto err;
1184 }
1185
1186 /* get the certificate types */
1187 ctype_num= *(p++);
1188 if (ctype_num > SSL3_CT_NUMBER)
1189 ctype_num=SSL3_CT_NUMBER;
1190 for (i=0; i<ctype_num; i++)
1191 s->s3->tmp.ctype[i]= p[i];
1192 p+=ctype_num;
1193
1194 /* get the CA RDNs */
1195 n2s(p,llen);
1196#if 0
1197{
1198FILE *out;
1199out=fopen("/tmp/vsign.der","w");
1200fwrite(p,1,llen,out);
1201fclose(out);
1202}
1203#endif
1204
1205 if ((llen+ctype_num+2+1) != n)
1206 {
1207 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1208 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1209 goto err;
1210 }
1211
1212 for (nc=0; nc<llen; )
1213 {
1214 n2s(p,l);
1215 if ((l+nc+2) > llen)
1216 {
1217 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1218 goto cont; /* netscape bugs */
1219 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1220 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1221 goto err;
1222 }
1223
1224 q=p;
1225
1226 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1227 {
1228 /* If netscape tollerance is on, ignore errors */
1229 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1230 goto cont;
1231 else
1232 {
1233 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1234 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1235 goto err;
1236 }
1237 }
1238
1239 if (q != (p+l))
1240 {
1241 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1242 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1243 goto err;
1244 }
1245 if (!sk_X509_NAME_push(ca_sk,xn))
1246 {
1247 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1248 goto err;
1249 }
1250
1251 p+=l;
1252 nc+=l+2;
1253 }
1254
1255 if (0)
1256 {
1257cont:
1258 ERR_clear_error();
1259 }
1260
1261 /* we should setup a certficate to return.... */
1262 s->s3->tmp.cert_req=1;
1263 s->s3->tmp.ctype_num=ctype_num;
1264 if (s->s3->tmp.ca_names != NULL)
1265 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1266 s->s3->tmp.ca_names=ca_sk;
1267 ca_sk=NULL;
1268
1269 ret=1;
1270err:
1271 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1272 return(ret);
1273 }
1274
1275static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
1276 {
1277 return(X509_NAME_cmp(*a,*b));
1278 }
1279
1280static int ssl3_get_server_done(SSL *s)
1281 {
1282 int ok,ret=0;
1283 long n;
1284
1285 n=ssl3_get_message(s,
1286 SSL3_ST_CR_SRVR_DONE_A,
1287 SSL3_ST_CR_SRVR_DONE_B,
1288 SSL3_MT_SERVER_DONE,
1289 30, /* should be very small, like 0 :-) */
1290 &ok);
1291
1292 if (!ok) return((int)n);
1293 if (n > 0)
1294 {
1295 /* should contain no data */
1296 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1297 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1298 }
1299 ret=1;
1300 return(ret);
1301 }
1302
1303static int ssl3_send_client_key_exchange(SSL *s)
1304 {
1305 unsigned char *p,*d;
1306 int n;
1307 unsigned long l;
1308#ifndef NO_RSA
1309 unsigned char *q;
1310 EVP_PKEY *pkey=NULL;
1311#endif
1312
1313 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1314 {
1315 d=(unsigned char *)s->init_buf->data;
1316 p= &(d[4]);
1317
1318 l=s->s3->tmp.new_cipher->algorithms;
1319
1320#ifndef NO_RSA
1321 if (l & SSL_kRSA)
1322 {
1323 RSA *rsa;
1324 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1325
1326 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1327 rsa=s->session->sess_cert->peer_rsa_tmp;
1328 else
1329 {
1330 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1331 if ((pkey == NULL) ||
1332 (pkey->type != EVP_PKEY_RSA) ||
1333 (pkey->pkey.rsa == NULL))
1334 {
1335 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1336 goto err;
1337 }
1338 rsa=pkey->pkey.rsa;
1339 EVP_PKEY_free(pkey);
1340 }
1341
1342 tmp_buf[0]=s->client_version>>8;
1343 tmp_buf[1]=s->client_version&0xff;
1344 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1345
1346 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1347
1348 q=p;
1349 /* Fix buf for TLS and beyond */
1350 if (s->version > SSL3_VERSION)
1351 p+=2;
1352 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1353 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1354#ifdef PKCS1_CHECK
1355 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1356 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1357#endif
1358 if (n <= 0)
1359 {
1360 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1361 goto err;
1362 }
1363
1364 /* Fix buf for TLS and beyond */
1365 if (s->version > SSL3_VERSION)
1366 {
1367 s2n(n,q);
1368 n+=2;
1369 }
1370
1371 s->session->master_key_length=
1372 s->method->ssl3_enc->generate_master_secret(s,
1373 s->session->master_key,
1374 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1375 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1376 }
1377 else
1378#endif
1379#ifndef NO_DH
1380 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1381 {
1382 DH *dh_srvr,*dh_clnt;
1383
1384 if (s->session->sess_cert->peer_dh_tmp != NULL)
1385 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1386 else
1387 {
1388 /* we get them from the cert */
1389 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1390 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1391 goto err;
1392 }
1393
1394 /* generate a new random key */
1395 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1396 {
1397 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1398 goto err;
1399 }
1400 if (!DH_generate_key(dh_clnt))
1401 {
1402 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1403 goto err;
1404 }
1405
1406 /* use the 'p' output buffer for the DH key, but
1407 * make sure to clear it out afterwards */
1408
1409 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1410
1411 if (n <= 0)
1412 {
1413 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1414 goto err;
1415 }
1416
1417 /* generate master key from the result */
1418 s->session->master_key_length=
1419 s->method->ssl3_enc->generate_master_secret(s,
1420 s->session->master_key,p,n);
1421 /* clean up */
1422 memset(p,0,n);
1423
1424 /* send off the data */
1425 n=BN_num_bytes(dh_clnt->pub_key);
1426 s2n(n,p);
1427 BN_bn2bin(dh_clnt->pub_key,p);
1428 n+=2;
1429
1430 DH_free(dh_clnt);
1431
1432 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1433 }
1434 else
1435#endif
1436 {
1437 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1438 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1439 goto err;
1440 }
1441
1442 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1443 l2n3(n,d);
1444
1445 s->state=SSL3_ST_CW_KEY_EXCH_B;
1446 /* number of bytes to write */
1447 s->init_num=n+4;
1448 s->init_off=0;
1449 }
1450
1451 /* SSL3_ST_CW_KEY_EXCH_B */
1452 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1453err:
1454 return(-1);
1455 }
1456
1457static int ssl3_send_client_verify(SSL *s)
1458 {
1459 unsigned char *p,*d;
1460 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1461 EVP_PKEY *pkey;
1462#ifndef NO_RSA
1463 int i=0;
1464#endif
1465 unsigned long n;
1466#ifndef NO_DSA
1467 int j;
1468#endif
1469
1470 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1471 {
1472 d=(unsigned char *)s->init_buf->data;
1473 p= &(d[4]);
1474 pkey=s->cert->key->privatekey;
1475
1476 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1477 &(data[MD5_DIGEST_LENGTH]));
1478
1479#ifndef NO_RSA
1480 if (pkey->type == EVP_PKEY_RSA)
1481 {
1482 s->method->ssl3_enc->cert_verify_mac(s,
1483 &(s->s3->finish_dgst1),&(data[0]));
1484 i=RSA_private_encrypt(
1485 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1486 data,&(p[2]),pkey->pkey.rsa,
1487 RSA_PKCS1_PADDING);
1488 if (i <= 0)
1489 {
1490 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1491 goto err;
1492 }
1493 s2n(i,p);
1494 n=i+2;
1495 }
1496 else
1497#endif
1498#ifndef NO_DSA
1499 if (pkey->type == EVP_PKEY_DSA)
1500 {
1501 if (!DSA_sign(pkey->save_type,
1502 &(data[MD5_DIGEST_LENGTH]),
1503 SHA_DIGEST_LENGTH,&(p[2]),
1504 (unsigned int *)&j,pkey->pkey.dsa))
1505 {
1506 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1507 goto err;
1508 }
1509 s2n(j,p);
1510 n=j+2;
1511 }
1512 else
1513#endif
1514 {
1515 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1516 goto err;
1517 }
1518 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1519 l2n3(n,d);
1520
1521 s->init_num=(int)n+4;
1522 s->init_off=0;
1523 }
1524 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1525err:
1526 return(-1);
1527 }
1528
1529static int ssl3_send_client_certificate(SSL *s)
1530 {
1531 X509 *x509=NULL;
1532 EVP_PKEY *pkey=NULL;
1533 int i;
1534 unsigned long l;
1535
1536 if (s->state == SSL3_ST_CW_CERT_A)
1537 {
1538 if ((s->cert == NULL) ||
1539 (s->cert->key->x509 == NULL) ||
1540 (s->cert->key->privatekey == NULL))
1541 s->state=SSL3_ST_CW_CERT_B;
1542 else
1543 s->state=SSL3_ST_CW_CERT_C;
1544 }
1545
1546 /* We need to get a client cert */
1547 if (s->state == SSL3_ST_CW_CERT_B)
1548 {
1549 /* If we get an error, we need to
1550 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1551 * We then get retied later */
1552 i=0;
1553 if (s->ctx->client_cert_cb != NULL)
1554 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1555 if (i < 0)
1556 {
1557 s->rwstate=SSL_X509_LOOKUP;
1558 return(-1);
1559 }
1560 s->rwstate=SSL_NOTHING;
1561 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1562 {
1563 s->state=SSL3_ST_CW_CERT_B;
1564 if ( !SSL_use_certificate(s,x509) ||
1565 !SSL_use_PrivateKey(s,pkey))
1566 i=0;
1567 }
1568 else if (i == 1)
1569 {
1570 i=0;
1571 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1572 }
1573
1574 if (x509 != NULL) X509_free(x509);
1575 if (pkey != NULL) EVP_PKEY_free(pkey);
1576 if (i == 0)
1577 {
1578 if (s->version == SSL3_VERSION)
1579 {
1580 s->s3->tmp.cert_req=0;
1581 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1582 return(1);
1583 }
1584 else
1585 {
1586 s->s3->tmp.cert_req=2;
1587 }
1588 }
1589
1590 /* Ok, we have a cert */
1591 s->state=SSL3_ST_CW_CERT_C;
1592 }
1593
1594 if (s->state == SSL3_ST_CW_CERT_C)
1595 {
1596 s->state=SSL3_ST_CW_CERT_D;
1597 l=ssl3_output_cert_chain(s,
1598 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1599 s->init_num=(int)l;
1600 s->init_off=0;
1601 }
1602 /* SSL3_ST_CW_CERT_D */
1603 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1604 }
1605
1606#define has_bits(i,m) (((i)&(m)) == (m))
1607
1608static int ssl3_check_cert_and_algorithm(SSL *s)
1609 {
1610 int i,idx;
1611 long algs;
1612 EVP_PKEY *pkey=NULL;
1613 SESS_CERT *sc;
1614#ifndef NO_RSA
1615 RSA *rsa;
1616#endif
1617#ifndef NO_DH
1618 DH *dh;
1619#endif
1620
1621 sc=s->session->sess_cert;
1622
1623 if (sc == NULL)
1624 {
1625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1626 goto err;
1627 }
1628
1629 algs=s->s3->tmp.new_cipher->algorithms;
1630
1631 /* we don't have a certificate */
1632 if (algs & (SSL_aDH|SSL_aNULL))
1633 return(1);
1634
1635#ifndef NO_RSA
1636 rsa=s->session->sess_cert->peer_rsa_tmp;
1637#endif
1638#ifndef NO_DH
1639 dh=s->session->sess_cert->peer_dh_tmp;
1640#endif
1641
1642 /* This is the passed certificate */
1643
1644 idx=sc->peer_cert_type;
1645 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1646 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1647 EVP_PKEY_free(pkey);
1648
1649
1650 /* Check that we have a certificate if we require one */
1651 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1652 {
1653 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1654 goto f_err;
1655 }
1656#ifndef NO_DSA
1657 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1658 {
1659 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1660 goto f_err;
1661 }
1662#endif
1663#ifndef NO_RSA
1664 if ((algs & SSL_kRSA) &&
1665 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1666 {
1667 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1668 goto f_err;
1669 }
1670#endif
1671#ifndef NO_DH
1672 if ((algs & SSL_kEDH) &&
1673 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1674 {
1675 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1676 goto f_err;
1677 }
1678 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1679 {
1680 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1681 goto f_err;
1682 }
1683#ifndef NO_DSA
1684 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1685 {
1686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1687 goto f_err;
1688 }
1689#endif
1690#endif
1691
1692 if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
1693 {
1694#ifndef NO_RSA
1695 if (algs & SSL_kRSA)
1696 {
1697 if (rsa == NULL
1698 || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
1699 {
1700 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1701 goto f_err;
1702 }
1703 }
1704 else
1705#endif
1706#ifndef NO_DH
1707 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1708 {
1709 if (dh == NULL
1710 || DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
1711 {
1712 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1713 goto f_err;
1714 }
1715 }
1716 else
1717#endif
1718 {
1719 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1720 goto f_err;
1721 }
1722 }
1723 return(1);
1724f_err:
1725 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1726err:
1727 return(0);
1728 }
1729
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-20 06:24:53 +0000