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d02b48c6 | 1 | /* ssl/s3_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 "buffer.h" | |
61 | #include "rand.h" | |
62 | #include "objects.h" | |
63 | #include "evp.h" | |
64 | #include "ssl_locl.h" | |
65 | ||
66 | #define BREAK break | |
67 | /* SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); | |
68 | * SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
69 | * SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); | |
70 | * SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
71 | * SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); | |
72 | * SSLerr(SSL_F_SSL3_GET_SERVER_DONE,ERR_R_MALLOC_FAILURE); | |
73 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT); | |
74 | */ | |
75 | ||
76 | #ifndef NOPROTO | |
77 | static int ssl3_client_hello(SSL *s); | |
78 | static int ssl3_get_server_hello(SSL *s); | |
79 | static int ssl3_get_certificate_request(SSL *s); | |
80 | static int ca_dn_cmp(X509_NAME **a,X509_NAME **b); | |
81 | static int ssl3_get_server_done(SSL *s); | |
82 | static int ssl3_send_client_verify(SSL *s); | |
83 | static int ssl3_send_client_certificate(SSL *s); | |
84 | static int ssl3_send_client_key_exchange(SSL *s); | |
85 | static int ssl3_get_key_exchange(SSL *s); | |
86 | static int ssl3_get_server_certificate(SSL *s); | |
87 | static int ssl3_check_cert_and_algorithm(SSL *s); | |
88 | #else | |
89 | static int ssl3_client_hello(); | |
90 | static int ssl3_get_server_hello(); | |
91 | static int ssl3_get_certificate_request(); | |
92 | static int ca_dn_cmp(); | |
93 | static int ssl3_get_server_done(); | |
94 | static int ssl3_send_client_verify(); | |
95 | static int ssl3_send_client_certificate(); | |
96 | static int ssl3_send_client_key_exchange(); | |
97 | static int ssl3_get_key_exchange(); | |
98 | static int ssl3_get_server_certificate(); | |
99 | static int ssl3_check_cert_and_algorithm(); | |
100 | #endif | |
101 | ||
102 | static SSL_METHOD *ssl3_get_client_method(ver) | |
103 | int ver; | |
104 | { | |
58964a49 | 105 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
106 | return(SSLv3_client_method()); |
107 | else | |
108 | return(NULL); | |
109 | } | |
110 | ||
111 | SSL_METHOD *SSLv3_client_method() | |
112 | { | |
113 | static int init=1; | |
114 | static SSL_METHOD SSLv3_client_data; | |
115 | ||
116 | if (init) | |
117 | { | |
118 | init=0; | |
119 | memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(), | |
120 | sizeof(SSL_METHOD)); | |
121 | SSLv3_client_data.ssl_connect=ssl3_connect; | |
122 | SSLv3_client_data.get_ssl_method=ssl3_get_client_method; | |
123 | } | |
124 | return(&SSLv3_client_data); | |
125 | } | |
126 | ||
127 | int ssl3_connect(s) | |
128 | SSL *s; | |
129 | { | |
130 | BUF_MEM *buf; | |
131 | unsigned long Time=time(NULL),l; | |
132 | long num1; | |
133 | void (*cb)()=NULL; | |
134 | int ret= -1; | |
58964a49 | 135 | BIO *under; |
d02b48c6 RE |
136 | int new_state,state,skip=0;; |
137 | ||
138 | RAND_seed((unsigned char *)&Time,sizeof(Time)); | |
139 | ERR_clear_error(); | |
58964a49 | 140 | clear_sys_error(); |
d02b48c6 RE |
141 | |
142 | if (s->info_callback != NULL) | |
143 | cb=s->info_callback; | |
144 | else if (s->ctx->info_callback != NULL) | |
145 | cb=s->ctx->info_callback; | |
146 | ||
147 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
148 | s->in_handshake++; | |
149 | ||
150 | for (;;) | |
151 | { | |
152 | state=s->state; | |
153 | ||
154 | switch(s->state) | |
155 | { | |
156 | case SSL_ST_RENEGOTIATE: | |
157 | s->new_session=1; | |
158 | s->state=SSL_ST_CONNECT; | |
58964a49 | 159 | s->ctx->sess_connect_renegotiate++; |
d02b48c6 RE |
160 | /* break */ |
161 | case SSL_ST_BEFORE: | |
162 | case SSL_ST_CONNECT: | |
163 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
164 | case SSL_ST_OK|SSL_ST_CONNECT: | |
165 | ||
166 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
167 | ||
58964a49 RE |
168 | if ((s->version & 0xff00 ) != 0x0300) |
169 | abort(); | |
170 | /* s->version=SSL3_VERSION; */ | |
d02b48c6 RE |
171 | s->type=SSL_ST_CONNECT; |
172 | ||
173 | if (s->init_buf == NULL) | |
174 | { | |
175 | if ((buf=BUF_MEM_new()) == NULL) | |
176 | { | |
177 | ret= -1; | |
178 | goto end; | |
179 | } | |
180 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
181 | { | |
182 | ret= -1; | |
183 | goto end; | |
184 | } | |
185 | s->init_buf=buf; | |
186 | } | |
187 | ||
188 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
189 | ||
190 | /* setup buffing BIO */ | |
58964a49 | 191 | if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } |
d02b48c6 RE |
192 | |
193 | /* don't push the buffering BIO quite yet */ | |
194 | ||
195 | ssl3_init_finished_mac(s); | |
196 | ||
197 | s->state=SSL3_ST_CW_CLNT_HELLO_A; | |
198 | s->ctx->sess_connect++; | |
199 | s->init_num=0; | |
200 | break; | |
201 | ||
202 | case SSL3_ST_CW_CLNT_HELLO_A: | |
203 | case SSL3_ST_CW_CLNT_HELLO_B: | |
204 | ||
205 | s->shutdown=0; | |
206 | ret=ssl3_client_hello(s); | |
207 | if (ret <= 0) goto end; | |
208 | s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
209 | s->init_num=0; | |
210 | ||
211 | /* turn on buffering for the next lot of output */ | |
58964a49 RE |
212 | if (s->bbio != s->wbio) |
213 | s->wbio=BIO_push(s->bbio,s->wbio); | |
d02b48c6 RE |
214 | |
215 | break; | |
216 | ||
217 | case SSL3_ST_CR_SRVR_HELLO_A: | |
218 | case SSL3_ST_CR_SRVR_HELLO_B: | |
219 | ret=ssl3_get_server_hello(s); | |
220 | if (ret <= 0) goto end; | |
221 | if (s->hit) | |
222 | s->state=SSL3_ST_CR_FINISHED_A; | |
223 | else | |
224 | s->state=SSL3_ST_CR_CERT_A; | |
225 | s->init_num=0; | |
226 | break; | |
227 | ||
228 | case SSL3_ST_CR_CERT_A: | |
229 | case SSL3_ST_CR_CERT_B: | |
230 | /* Check if it is anon DH */ | |
231 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
232 | { | |
233 | ret=ssl3_get_server_certificate(s); | |
234 | if (ret <= 0) goto end; | |
235 | } | |
236 | else | |
237 | skip=1; | |
238 | s->state=SSL3_ST_CR_KEY_EXCH_A; | |
239 | s->init_num=0; | |
240 | break; | |
241 | ||
242 | case SSL3_ST_CR_KEY_EXCH_A: | |
243 | case SSL3_ST_CR_KEY_EXCH_B: | |
244 | ret=ssl3_get_key_exchange(s); | |
245 | if (ret <= 0) goto end; | |
246 | s->state=SSL3_ST_CR_CERT_REQ_A; | |
247 | s->init_num=0; | |
248 | ||
249 | /* at this point we check that we have the | |
250 | * required stuff from the server */ | |
251 | if (!ssl3_check_cert_and_algorithm(s)) | |
252 | { | |
253 | ret= -1; | |
254 | goto end; | |
255 | } | |
256 | break; | |
257 | ||
258 | case SSL3_ST_CR_CERT_REQ_A: | |
259 | case SSL3_ST_CR_CERT_REQ_B: | |
260 | ret=ssl3_get_certificate_request(s); | |
261 | if (ret <= 0) goto end; | |
262 | s->state=SSL3_ST_CR_SRVR_DONE_A; | |
263 | s->init_num=0; | |
264 | break; | |
265 | ||
266 | case SSL3_ST_CR_SRVR_DONE_A: | |
267 | case SSL3_ST_CR_SRVR_DONE_B: | |
268 | ret=ssl3_get_server_done(s); | |
269 | if (ret <= 0) goto end; | |
270 | if (s->s3->tmp.cert_req) | |
271 | s->state=SSL3_ST_CW_CERT_A; | |
272 | else | |
273 | s->state=SSL3_ST_CW_KEY_EXCH_A; | |
274 | s->init_num=0; | |
275 | ||
276 | break; | |
277 | ||
278 | case SSL3_ST_CW_CERT_A: | |
279 | case SSL3_ST_CW_CERT_B: | |
280 | case SSL3_ST_CW_CERT_C: | |
281 | ret=ssl3_send_client_certificate(s); | |
282 | if (ret <= 0) goto end; | |
283 | s->state=SSL3_ST_CW_KEY_EXCH_A; | |
284 | s->init_num=0; | |
285 | break; | |
286 | ||
287 | case SSL3_ST_CW_KEY_EXCH_A: | |
288 | case SSL3_ST_CW_KEY_EXCH_B: | |
289 | ret=ssl3_send_client_key_exchange(s); | |
290 | if (ret <= 0) goto end; | |
291 | l=s->s3->tmp.new_cipher->algorithms; | |
292 | /* EAY EAY EAY need to check for DH fix cert | |
293 | * sent back */ | |
58964a49 RE |
294 | /* For TLS, cert_req is set to 2, so a cert chain |
295 | * of nothing is sent, but no verify packet is sent */ | |
296 | if (s->s3->tmp.cert_req == 1) | |
d02b48c6 RE |
297 | { |
298 | s->state=SSL3_ST_CW_CERT_VRFY_A; | |
299 | } | |
300 | else | |
301 | { | |
302 | s->state=SSL3_ST_CW_CHANGE_A; | |
303 | s->s3->change_cipher_spec=0; | |
304 | } | |
305 | ||
306 | s->init_num=0; | |
307 | break; | |
308 | ||
309 | case SSL3_ST_CW_CERT_VRFY_A: | |
310 | case SSL3_ST_CW_CERT_VRFY_B: | |
311 | ret=ssl3_send_client_verify(s); | |
312 | if (ret <= 0) goto end; | |
313 | s->state=SSL3_ST_CW_CHANGE_A; | |
314 | s->init_num=0; | |
315 | s->s3->change_cipher_spec=0; | |
316 | break; | |
317 | ||
318 | case SSL3_ST_CW_CHANGE_A: | |
319 | case SSL3_ST_CW_CHANGE_B: | |
320 | ret=ssl3_send_change_cipher_spec(s, | |
321 | SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); | |
322 | if (ret <= 0) goto end; | |
323 | s->state=SSL3_ST_CW_FINISHED_A; | |
324 | s->init_num=0; | |
325 | ||
326 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 | 327 | if (!s->method->ssl3_enc->setup_key_block(s)) |
d02b48c6 RE |
328 | { |
329 | ret= -1; | |
330 | goto end; | |
331 | } | |
332 | ||
58964a49 | 333 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
334 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) |
335 | { | |
336 | ret= -1; | |
337 | goto end; | |
338 | } | |
339 | ||
340 | break; | |
341 | ||
342 | case SSL3_ST_CW_FINISHED_A: | |
343 | case SSL3_ST_CW_FINISHED_B: | |
344 | ret=ssl3_send_finished(s, | |
345 | SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, | |
58964a49 RE |
346 | s->method->ssl3_enc->client_finished, |
347 | s->method->ssl3_enc->client_finished_len); | |
d02b48c6 RE |
348 | if (ret <= 0) goto end; |
349 | s->state=SSL3_ST_CW_FLUSH; | |
350 | ||
351 | /* clear flags */ | |
352 | s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; | |
353 | if (s->hit) | |
354 | { | |
355 | s->s3->tmp.next_state=SSL_ST_OK; | |
356 | if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) | |
357 | { | |
358 | s->state=SSL_ST_OK; | |
359 | s->s3->flags|=SSL3_FLAGS_POP_BUFFER; | |
360 | s->s3->delay_buf_pop_ret=0; | |
361 | } | |
362 | } | |
363 | else | |
364 | { | |
365 | s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; | |
366 | } | |
367 | s->init_num=0; | |
368 | break; | |
369 | ||
370 | case SSL3_ST_CR_FINISHED_A: | |
371 | case SSL3_ST_CR_FINISHED_B: | |
372 | ||
373 | ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, | |
58964a49 | 374 | SSL3_ST_CR_FINISHED_B); |
d02b48c6 RE |
375 | if (ret <= 0) goto end; |
376 | ||
377 | if (s->hit) | |
378 | s->state=SSL3_ST_CW_CHANGE_A; | |
379 | else | |
380 | s->state=SSL_ST_OK; | |
381 | s->init_num=0; | |
382 | break; | |
383 | ||
384 | case SSL3_ST_CW_FLUSH: | |
385 | /* number of bytes to be flushed */ | |
386 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
387 | if (num1 > 0) | |
388 | { | |
389 | s->rwstate=SSL_WRITING; | |
390 | num1=BIO_flush(s->wbio); | |
391 | if (num1 <= 0) { ret= -1; goto end; } | |
392 | s->rwstate=SSL_NOTHING; | |
393 | } | |
394 | ||
395 | s->state=s->s3->tmp.next_state; | |
396 | break; | |
397 | ||
398 | case SSL_ST_OK: | |
399 | /* clean a few things up */ | |
400 | ssl3_cleanup_key_block(s); | |
401 | ||
402 | BUF_MEM_free(s->init_buf); | |
403 | s->init_buf=NULL; | |
404 | ||
405 | if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) | |
406 | { | |
407 | /* remove buffering */ | |
408 | under=BIO_pop(s->wbio); | |
409 | if (under != NULL) | |
410 | s->wbio=under; | |
411 | else | |
412 | abort(); /* ok */ | |
413 | ||
414 | BIO_free(s->bbio); | |
415 | s->bbio=NULL; | |
416 | } | |
417 | /* else do it later */ | |
418 | ||
419 | s->init_num=0; | |
420 | s->new_session=0; | |
421 | ||
422 | ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); | |
58964a49 | 423 | if (s->hit) s->ctx->sess_hit++; |
d02b48c6 RE |
424 | |
425 | ret=1; | |
426 | /* s->server=0; */ | |
427 | s->handshake_func=ssl3_connect; | |
428 | s->ctx->sess_connect_good++; | |
429 | ||
430 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
431 | ||
432 | goto end; | |
dfeab068 | 433 | /* break; */ |
d02b48c6 RE |
434 | |
435 | default: | |
436 | SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); | |
437 | ret= -1; | |
438 | goto end; | |
439 | /* break; */ | |
440 | } | |
441 | ||
442 | /* did we do anything */ | |
443 | if (!s->s3->tmp.reuse_message && !skip) | |
444 | { | |
58964a49 RE |
445 | if (s->debug) |
446 | { | |
447 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
448 | goto end; | |
449 | } | |
d02b48c6 RE |
450 | |
451 | if ((cb != NULL) && (s->state != state)) | |
452 | { | |
453 | new_state=s->state; | |
454 | s->state=state; | |
455 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
456 | s->state=new_state; | |
457 | } | |
458 | } | |
459 | skip=0; | |
460 | } | |
461 | end: | |
462 | if (cb != NULL) | |
463 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
464 | s->in_handshake--; | |
465 | return(ret); | |
466 | } | |
467 | ||
468 | ||
469 | static int ssl3_client_hello(s) | |
470 | SSL *s; | |
471 | { | |
472 | unsigned char *buf; | |
473 | unsigned char *p,*d; | |
474 | int i; | |
475 | unsigned long Time,l; | |
476 | ||
477 | buf=(unsigned char *)s->init_buf->data; | |
478 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) | |
479 | { | |
480 | if ((s->session == NULL) || | |
dfeab068 RE |
481 | (s->session->ssl_version != s->version) || |
482 | (s->session->not_resumable)) | |
d02b48c6 RE |
483 | { |
484 | if (!ssl_get_new_session(s,0)) | |
485 | goto err; | |
486 | } | |
487 | /* else use the pre-loaded session */ | |
488 | ||
489 | p=s->s3->client_random; | |
490 | Time=time(NULL); /* Time */ | |
491 | l2n(Time,p); | |
dfeab068 | 492 | RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); |
d02b48c6 RE |
493 | |
494 | /* Do the message type and length last */ | |
495 | d=p= &(buf[4]); | |
496 | ||
58964a49 RE |
497 | *(p++)=s->version>>8; |
498 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
499 | |
500 | /* Random stuff */ | |
501 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
502 | p+=SSL3_RANDOM_SIZE; | |
503 | ||
504 | /* Session ID */ | |
505 | if (s->new_session) | |
506 | i=0; | |
507 | else | |
508 | i=s->session->session_id_length; | |
509 | *(p++)=i; | |
510 | if (i != 0) | |
511 | { | |
512 | memcpy(p,s->session->session_id,i); | |
513 | p+=i; | |
514 | } | |
515 | ||
516 | /* Ciphers supported */ | |
517 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2])); | |
518 | if (i == 0) | |
519 | { | |
520 | SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
521 | goto err; | |
522 | } | |
523 | s2n(i,p); | |
524 | p+=i; | |
525 | ||
526 | /* hardwire in the NULL compression algorithm. */ | |
dfeab068 | 527 | /* COMPRESSION */ |
d02b48c6 RE |
528 | *(p++)=1; |
529 | *(p++)=0; | |
530 | ||
531 | l=(p-d); | |
532 | d=buf; | |
533 | *(d++)=SSL3_MT_CLIENT_HELLO; | |
534 | l2n3(l,d); | |
535 | ||
536 | s->state=SSL3_ST_CW_CLNT_HELLO_B; | |
537 | /* number of bytes to write */ | |
538 | s->init_num=p-buf; | |
539 | s->init_off=0; | |
540 | } | |
541 | ||
542 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
543 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
544 | err: | |
545 | return(-1); | |
546 | } | |
547 | ||
548 | static int ssl3_get_server_hello(s) | |
549 | SSL *s; | |
550 | { | |
551 | STACK *sk; | |
552 | SSL_CIPHER *c; | |
553 | unsigned char *p,*d; | |
554 | int i,al,ok; | |
555 | unsigned int j; | |
556 | long n; | |
557 | ||
558 | n=ssl3_get_message(s, | |
559 | SSL3_ST_CR_SRVR_HELLO_A, | |
560 | SSL3_ST_CR_SRVR_HELLO_B, | |
561 | SSL3_MT_SERVER_HELLO, | |
562 | 300, /* ?? */ | |
563 | &ok); | |
564 | ||
565 | if (!ok) return((int)n); | |
566 | d=p=(unsigned char *)s->init_buf->data; | |
567 | ||
58964a49 | 568 | if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) |
d02b48c6 RE |
569 | { |
570 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); | |
58964a49 RE |
571 | s->version=(s->version&0xff00)|p[1]; |
572 | al=SSL_AD_PROTOCOL_VERSION; | |
573 | goto f_err; | |
d02b48c6 RE |
574 | } |
575 | p+=2; | |
576 | ||
577 | /* load the server hello data */ | |
578 | /* load the server random */ | |
579 | memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); | |
580 | p+=SSL3_RANDOM_SIZE; | |
581 | ||
582 | /* get the session-id */ | |
583 | j= *(p++); | |
584 | ||
585 | if ((j != 0) && (j != SSL3_SESSION_ID_SIZE)) | |
586 | { | |
587 | /* SSLref returns 16 :-( */ | |
588 | if (j < SSL2_SSL_SESSION_ID_LENGTH) | |
589 | { | |
58964a49 | 590 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
591 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT); |
592 | goto f_err; | |
593 | } | |
594 | } | |
58964a49 | 595 | if ((j != 0) && (j == s->session->session_id_length) && |
d02b48c6 RE |
596 | (memcmp(p,s->session->session_id,j) == 0)) |
597 | s->hit=1; | |
58964a49 | 598 | else /* a miss or crap from the other end */ |
d02b48c6 | 599 | { |
58964a49 RE |
600 | /* If we were trying for session-id reuse, make a new |
601 | * SSL_SESSION so we don't stuff up other people */ | |
d02b48c6 | 602 | s->hit=0; |
58964a49 RE |
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 */ | |
d02b48c6 RE |
613 | } |
614 | p+=j; | |
615 | c=ssl_get_cipher_by_char(s,p); | |
616 | if (c == NULL) | |
617 | { | |
618 | /* unknown cipher */ | |
58964a49 | 619 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
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_find(sk,(char *)c); | |
627 | if (i < 0) | |
628 | { | |
629 | /* we did not say we would use this cipher */ | |
58964a49 | 630 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
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 | { | |
58964a49 | 637 | if (!(s->options & |
d02b48c6 RE |
638 | SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) |
639 | { | |
58964a49 | 640 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
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 */ | |
dfeab068 | 648 | /* COMPRESSION */ |
d02b48c6 RE |
649 | j= *(p++); |
650 | if (j != 0) | |
651 | { | |
58964a49 | 652 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
653 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
654 | goto f_err; | |
655 | } | |
656 | ||
657 | if (p != (d+n)) | |
658 | { | |
659 | /* wrong packet length */ | |
58964a49 | 660 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
661 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); |
662 | goto err; | |
663 | } | |
664 | ||
665 | return(1); | |
666 | f_err: | |
667 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
668 | err: | |
669 | return(-1); | |
670 | } | |
671 | ||
672 | static int ssl3_get_server_certificate(s) | |
673 | SSL *s; | |
674 | { | |
675 | int al,i,ok,ret= -1; | |
676 | unsigned long n,nc,llen,l; | |
677 | X509 *x=NULL; | |
678 | unsigned char *p,*d,*q; | |
679 | STACK *sk=NULL; | |
680 | CERT *c; | |
681 | EVP_PKEY *pkey=NULL; | |
682 | ||
683 | n=ssl3_get_message(s, | |
684 | SSL3_ST_CR_CERT_A, | |
685 | SSL3_ST_CR_CERT_B, | |
686 | -1, | |
687 | #if defined(MSDOS) && !defined(WIN32) | |
688 | 1024*30, /* 30k max cert list :-) */ | |
689 | #else | |
690 | 1024*100, /* 100k max cert list :-) */ | |
691 | #endif | |
692 | &ok); | |
693 | ||
694 | if (!ok) return((int)n); | |
695 | ||
696 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) | |
697 | { | |
698 | s->s3->tmp.reuse_message=1; | |
699 | return(1); | |
700 | } | |
701 | ||
702 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
703 | { | |
58964a49 | 704 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
705 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); |
706 | goto f_err; | |
707 | } | |
708 | d=p=(unsigned char *)s->init_buf->data; | |
709 | ||
710 | if ((sk=sk_new_null()) == NULL) | |
711 | { | |
712 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
713 | goto err; | |
714 | } | |
715 | ||
716 | n2l3(p,llen); | |
717 | if (llen+3 != n) | |
718 | { | |
58964a49 | 719 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
720 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
721 | goto f_err; | |
722 | } | |
723 | for (nc=0; nc<llen; ) | |
724 | { | |
725 | n2l3(p,l); | |
726 | if ((l+nc+3) > llen) | |
727 | { | |
58964a49 | 728 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
729 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
730 | goto f_err; | |
731 | } | |
732 | ||
733 | q=p; | |
734 | x=d2i_X509(NULL,&q,l); | |
735 | if (x == NULL) | |
736 | { | |
58964a49 | 737 | al=SSL_AD_BAD_CERTIFICATE; |
d02b48c6 RE |
738 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); |
739 | goto f_err; | |
740 | } | |
741 | if (q != (p+l)) | |
742 | { | |
58964a49 | 743 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
744 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
745 | goto f_err; | |
746 | } | |
747 | if (!sk_push(sk,(char *)x)) | |
748 | { | |
749 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
750 | goto err; | |
751 | } | |
752 | x=NULL; | |
753 | nc+=l+3; | |
754 | p=q; | |
755 | } | |
756 | ||
757 | i=ssl_verify_cert_chain(s,sk); | |
758 | if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) | |
759 | { | |
760 | al=ssl_verify_alarm_type(s->verify_result); | |
761 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); | |
762 | goto f_err; | |
763 | } | |
764 | ||
765 | c=ssl_cert_new(); | |
766 | if (c == NULL) goto err; | |
767 | ||
768 | if (s->session->cert) ssl_cert_free(s->session->cert); | |
769 | s->session->cert=c; | |
770 | ||
771 | c->cert_chain=sk; | |
772 | x=(X509 *)sk_value(sk,0); | |
773 | sk=NULL; | |
774 | ||
775 | pkey=X509_get_pubkey(x); | |
776 | ||
dfeab068 | 777 | if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)) |
d02b48c6 RE |
778 | { |
779 | x=NULL; | |
780 | al=SSL3_AL_FATAL; | |
781 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
782 | goto f_err; | |
783 | } | |
784 | ||
785 | i=ssl_cert_type(x,pkey); | |
786 | if (i < 0) | |
787 | { | |
788 | x=NULL; | |
789 | al=SSL3_AL_FATAL; | |
790 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
791 | goto f_err; | |
792 | } | |
793 | ||
794 | c->cert_type=i; | |
58964a49 | 795 | CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); |
d02b48c6 RE |
796 | if (c->pkeys[i].x509 != NULL) |
797 | X509_free(c->pkeys[i].x509); | |
798 | c->pkeys[i].x509=x; | |
799 | c->key= &(c->pkeys[i]); | |
800 | ||
801 | if ((s->session != NULL) && (s->session->peer != NULL)) | |
802 | X509_free(s->session->peer); | |
58964a49 | 803 | CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); |
d02b48c6 RE |
804 | s->session->peer=x; |
805 | ||
806 | x=NULL; | |
807 | ret=1; | |
808 | ||
809 | if (0) | |
810 | { | |
811 | f_err: | |
812 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
813 | } | |
814 | err: | |
815 | if (x != NULL) X509_free(x); | |
816 | if (sk != NULL) sk_pop_free(sk,X509_free); | |
817 | return(ret); | |
818 | } | |
819 | ||
820 | static int ssl3_get_key_exchange(s) | |
821 | SSL *s; | |
822 | { | |
823 | #ifndef NO_RSA | |
824 | unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; | |
825 | #endif | |
826 | EVP_MD_CTX md_ctx; | |
827 | unsigned char *param,*p; | |
828 | int al,i,j,param_len,ok; | |
829 | long n,alg; | |
830 | EVP_PKEY *pkey=NULL; | |
831 | RSA *rsa=NULL; | |
58964a49 | 832 | #ifndef NO_DH |
d02b48c6 | 833 | DH *dh=NULL; |
58964a49 | 834 | #endif |
d02b48c6 RE |
835 | |
836 | n=ssl3_get_message(s, | |
837 | SSL3_ST_CR_KEY_EXCH_A, | |
838 | SSL3_ST_CR_KEY_EXCH_B, | |
839 | -1, | |
840 | 1024*8, /* ?? */ | |
841 | &ok); | |
842 | ||
843 | if (!ok) return((int)n); | |
844 | ||
845 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) | |
846 | { | |
847 | s->s3->tmp.reuse_message=1; | |
848 | return(1); | |
849 | } | |
850 | ||
851 | param=p=(unsigned char *)s->init_buf->data; | |
852 | ||
853 | if (s->session->cert != NULL) | |
854 | { | |
855 | #ifndef NO_RSA | |
856 | if (s->session->cert->rsa_tmp != NULL) | |
857 | { | |
858 | RSA_free(s->session->cert->rsa_tmp); | |
859 | s->session->cert->rsa_tmp=NULL; | |
860 | } | |
861 | #endif | |
862 | #ifndef NO_DH | |
863 | if (s->session->cert->dh_tmp) | |
864 | { | |
865 | DH_free(s->session->cert->dh_tmp); | |
866 | s->session->cert->dh_tmp=NULL; | |
867 | } | |
868 | #endif | |
869 | } | |
870 | else | |
871 | { | |
872 | s->session->cert=ssl_cert_new(); | |
873 | } | |
874 | ||
875 | param_len=0; | |
876 | alg=s->s3->tmp.new_cipher->algorithms; | |
877 | ||
878 | #ifndef NO_RSA | |
879 | if (alg & SSL_kRSA) | |
880 | { | |
881 | if ((rsa=RSA_new()) == NULL) | |
882 | { | |
883 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
884 | goto err; | |
885 | } | |
886 | n2s(p,i); | |
887 | param_len=i+2; | |
888 | if (param_len > n) | |
889 | { | |
58964a49 | 890 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
891 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); |
892 | goto f_err; | |
893 | } | |
894 | if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) | |
895 | { | |
896 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); | |
897 | goto err; | |
898 | } | |
899 | p+=i; | |
900 | ||
901 | n2s(p,i); | |
902 | param_len+=i+2; | |
903 | if (param_len > n) | |
904 | { | |
58964a49 | 905 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
906 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); |
907 | goto f_err; | |
908 | } | |
909 | if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) | |
910 | { | |
911 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); | |
912 | goto err; | |
913 | } | |
914 | p+=i; | |
915 | n-=param_len; | |
916 | ||
917 | /* s->session->cert->rsa_tmp=rsa;*/ | |
918 | /* this should be because we are using an export cipher */ | |
919 | if (alg & SSL_aRSA) | |
920 | pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509); | |
921 | else | |
922 | { | |
923 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR); | |
924 | goto err; | |
925 | } | |
926 | s->session->cert->rsa_tmp=rsa; | |
927 | } | |
928 | else | |
929 | #endif | |
930 | #ifndef NO_DH | |
931 | if (alg & SSL_kEDH) | |
932 | { | |
933 | if ((dh=DH_new()) == NULL) | |
934 | { | |
935 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); | |
936 | goto err; | |
937 | } | |
938 | n2s(p,i); | |
939 | param_len=i+2; | |
940 | if (param_len > n) | |
941 | { | |
58964a49 | 942 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
943 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); |
944 | goto f_err; | |
945 | } | |
946 | if (!(dh->p=BN_bin2bn(p,i,NULL))) | |
947 | { | |
948 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); | |
949 | goto err; | |
950 | } | |
951 | p+=i; | |
952 | ||
953 | n2s(p,i); | |
954 | param_len+=i+2; | |
955 | if (param_len > n) | |
956 | { | |
58964a49 | 957 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
958 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); |
959 | goto f_err; | |
960 | } | |
961 | if (!(dh->g=BN_bin2bn(p,i,NULL))) | |
962 | { | |
963 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); | |
964 | goto err; | |
965 | } | |
966 | p+=i; | |
967 | ||
968 | n2s(p,i); | |
969 | param_len+=i+2; | |
970 | if (param_len > n) | |
971 | { | |
58964a49 | 972 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
973 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); |
974 | goto f_err; | |
975 | } | |
976 | if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) | |
977 | { | |
978 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); | |
979 | goto err; | |
980 | } | |
981 | p+=i; | |
982 | n-=param_len; | |
983 | ||
984 | #ifndef NO_RSA | |
985 | if (alg & SSL_aRSA) | |
986 | pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509); | |
987 | else | |
988 | #endif | |
989 | #ifndef NO_DSA | |
990 | if (alg & SSL_aDSS) | |
991 | pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509); | |
992 | #endif | |
993 | /* else anonymous DH, so no certificate or pkey. */ | |
994 | ||
995 | s->session->cert->dh_tmp=dh; | |
996 | } | |
997 | else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) | |
998 | { | |
58964a49 | 999 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1000 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); |
1001 | goto f_err; | |
1002 | } | |
1003 | #endif | |
dfeab068 RE |
1004 | if (alg & SSL_aFZA) |
1005 | { | |
1006 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1007 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); | |
1008 | goto f_err; | |
1009 | } | |
1010 | ||
d02b48c6 RE |
1011 | |
1012 | /* p points to the next byte, there are 'n' bytes left */ | |
1013 | ||
1014 | ||
1015 | /* if it was signed, check the signature */ | |
1016 | if (pkey != NULL) | |
1017 | { | |
1018 | n2s(p,i); | |
1019 | n-=2; | |
1020 | j=EVP_PKEY_size(pkey); | |
1021 | ||
1022 | if ((i != n) || (n > j) || (n <= 0)) | |
1023 | { | |
1024 | /* wrong packet length */ | |
58964a49 | 1025 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 | 1026 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); |
dfeab068 | 1027 | goto f_err; |
d02b48c6 RE |
1028 | } |
1029 | ||
1030 | #ifndef NO_RSA | |
1031 | if (pkey->type == EVP_PKEY_RSA) | |
1032 | { | |
1033 | int num; | |
1034 | ||
1035 | j=0; | |
1036 | q=md_buf; | |
1037 | for (num=2; num > 0; num--) | |
1038 | { | |
58964a49 RE |
1039 | EVP_DigestInit(&md_ctx,(num == 2) |
1040 | ?s->ctx->md5:s->ctx->sha1); | |
d02b48c6 RE |
1041 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1042 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1043 | EVP_DigestUpdate(&md_ctx,param,param_len); | |
1044 | EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i); | |
1045 | q+=i; | |
1046 | j+=i; | |
1047 | } | |
1048 | i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa, | |
1049 | RSA_PKCS1_PADDING); | |
1050 | if (i <= 0) | |
1051 | { | |
58964a49 | 1052 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1053 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); |
1054 | goto f_err; | |
1055 | } | |
1056 | if ((j != i) || (memcmp(p,md_buf,i) != 0)) | |
1057 | { | |
1058 | /* bad signature */ | |
58964a49 | 1059 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1060 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); |
1061 | goto f_err; | |
1062 | } | |
1063 | } | |
1064 | else | |
1065 | #endif | |
1066 | #ifndef NO_DSA | |
1067 | if (pkey->type == EVP_PKEY_DSA) | |
1068 | { | |
1069 | /* lets do DSS */ | |
1070 | EVP_VerifyInit(&md_ctx,EVP_dss1()); | |
1071 | EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1072 | EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1073 | EVP_VerifyUpdate(&md_ctx,param,param_len); | |
1074 | if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey)) | |
1075 | { | |
1076 | /* bad signature */ | |
58964a49 | 1077 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1078 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); |
1079 | goto f_err; | |
1080 | } | |
1081 | } | |
1082 | else | |
1083 | #endif | |
1084 | { | |
1085 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR); | |
1086 | goto err; | |
1087 | } | |
1088 | } | |
1089 | else | |
1090 | { | |
1091 | /* still data left over */ | |
1092 | if (!(alg & SSL_aNULL)) | |
1093 | { | |
1094 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR); | |
1095 | goto err; | |
1096 | } | |
1097 | if (n != 0) | |
1098 | { | |
58964a49 | 1099 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1100 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); |
1101 | goto f_err; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | return(1); | |
1106 | f_err: | |
1107 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1108 | err: | |
1109 | return(-1); | |
1110 | } | |
1111 | ||
1112 | static int ssl3_get_certificate_request(s) | |
1113 | SSL *s; | |
1114 | { | |
1115 | int ok,ret=0; | |
58964a49 RE |
1116 | unsigned long n,nc,l; |
1117 | unsigned int llen,ctype_num,i; | |
d02b48c6 RE |
1118 | X509_NAME *xn=NULL; |
1119 | unsigned char *p,*d,*q; | |
1120 | STACK *ca_sk=NULL; | |
1121 | ||
1122 | n=ssl3_get_message(s, | |
1123 | SSL3_ST_CR_CERT_REQ_A, | |
1124 | SSL3_ST_CR_CERT_REQ_B, | |
1125 | -1, | |
1126 | #if defined(MSDOS) && !defined(WIN32) | |
1127 | 1024*30, /* 30k max cert list :-) */ | |
1128 | #else | |
1129 | 1024*100, /* 100k max cert list :-) */ | |
1130 | #endif | |
1131 | &ok); | |
1132 | ||
1133 | if (!ok) return((int)n); | |
1134 | ||
1135 | s->s3->tmp.cert_req=0; | |
1136 | ||
1137 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) | |
1138 | { | |
1139 | s->s3->tmp.reuse_message=1; | |
1140 | return(1); | |
1141 | } | |
1142 | ||
1143 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) | |
1144 | { | |
58964a49 | 1145 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
d02b48c6 RE |
1146 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); |
1147 | goto err; | |
1148 | } | |
1149 | ||
58964a49 RE |
1150 | /* TLS does not like anon-DH with client cert */ |
1151 | if (s->version > SSL3_VERSION) | |
1152 | { | |
1153 | l=s->s3->tmp.new_cipher->algorithms; | |
1154 | if (l & SSL_aNULL) | |
1155 | { | |
1156 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); | |
1157 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); | |
1158 | goto err; | |
1159 | } | |
1160 | } | |
1161 | ||
d02b48c6 RE |
1162 | d=p=(unsigned char *)s->init_buf->data; |
1163 | ||
1164 | if ((ca_sk=sk_new(ca_dn_cmp)) == NULL) | |
1165 | { | |
1166 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); | |
1167 | goto err; | |
1168 | } | |
1169 | ||
1170 | /* get the certificate types */ | |
1171 | ctype_num= *(p++); | |
1172 | if (ctype_num > SSL3_CT_NUMBER) | |
1173 | ctype_num=SSL3_CT_NUMBER; | |
1174 | for (i=0; i<ctype_num; i++) | |
1175 | s->s3->tmp.ctype[i]= p[i]; | |
1176 | p+=ctype_num; | |
1177 | ||
1178 | /* get the CA RDNs */ | |
1179 | n2s(p,llen); | |
dfeab068 RE |
1180 | #if 0 |
1181 | { | |
1182 | FILE *out; | |
1183 | out=fopen("/tmp/vsign.der","w"); | |
1184 | fwrite(p,1,llen,out); | |
1185 | fclose(out); | |
1186 | } | |
1187 | #endif | |
1188 | ||
d02b48c6 RE |
1189 | if ((llen+ctype_num+2+1) != n) |
1190 | { | |
58964a49 | 1191 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
d02b48c6 RE |
1192 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); |
1193 | goto err; | |
1194 | } | |
1195 | ||
1196 | for (nc=0; nc<llen; ) | |
1197 | { | |
1198 | n2s(p,l); | |
1199 | if ((l+nc+2) > llen) | |
1200 | { | |
58964a49 | 1201 | if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 | 1202 | goto cont; /* netscape bugs */ |
58964a49 | 1203 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
d02b48c6 RE |
1204 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); |
1205 | goto err; | |
1206 | } | |
1207 | ||
1208 | q=p; | |
1209 | ||
1210 | if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) | |
1211 | { | |
1212 | /* If netscape tollerance is on, ignore errors */ | |
58964a49 | 1213 | if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) |
d02b48c6 RE |
1214 | goto cont; |
1215 | else | |
1216 | { | |
58964a49 | 1217 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
d02b48c6 RE |
1218 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); |
1219 | goto err; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | if (q != (p+l)) | |
1224 | { | |
58964a49 | 1225 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
d02b48c6 RE |
1226 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); |
1227 | goto err; | |
1228 | } | |
1229 | if (!sk_push(ca_sk,(char *)xn)) | |
1230 | { | |
1231 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); | |
1232 | goto err; | |
1233 | } | |
1234 | ||
1235 | p+=l; | |
1236 | nc+=l+2; | |
1237 | } | |
1238 | ||
1239 | if (0) | |
1240 | { | |
1241 | cont: | |
1242 | ERR_clear_error(); | |
1243 | } | |
1244 | ||
1245 | /* we should setup a certficate to return.... */ | |
1246 | s->s3->tmp.cert_req=1; | |
1247 | s->s3->tmp.ctype_num=ctype_num; | |
1248 | if (s->s3->tmp.ca_names != NULL) | |
1249 | sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free); | |
1250 | s->s3->tmp.ca_names=ca_sk; | |
1251 | ca_sk=NULL; | |
1252 | ||
1253 | ret=1; | |
1254 | err: | |
1255 | if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free); | |
1256 | return(ret); | |
1257 | } | |
1258 | ||
1259 | static int ca_dn_cmp(a,b) | |
1260 | X509_NAME **a,**b; | |
1261 | { | |
1262 | return(X509_NAME_cmp(*a,*b)); | |
1263 | } | |
1264 | ||
1265 | static int ssl3_get_server_done(s) | |
1266 | SSL *s; | |
1267 | { | |
1268 | int ok,ret=0; | |
1269 | long n; | |
1270 | ||
1271 | n=ssl3_get_message(s, | |
1272 | SSL3_ST_CR_SRVR_DONE_A, | |
1273 | SSL3_ST_CR_SRVR_DONE_B, | |
1274 | SSL3_MT_SERVER_DONE, | |
1275 | 30, /* should be very small, like 0 :-) */ | |
1276 | &ok); | |
1277 | ||
1278 | if (!ok) return((int)n); | |
1279 | if (n > 0) | |
1280 | { | |
1281 | /* should contain no data */ | |
58964a49 | 1282 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
d02b48c6 RE |
1283 | SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); |
1284 | } | |
1285 | ret=1; | |
1286 | return(ret); | |
1287 | } | |
1288 | ||
1289 | static int ssl3_send_client_key_exchange(s) | |
1290 | SSL *s; | |
1291 | { | |
58964a49 | 1292 | unsigned char *p,*q,*d; |
d02b48c6 RE |
1293 | int n; |
1294 | unsigned long l; | |
1295 | EVP_PKEY *pkey=NULL; | |
1296 | ||
1297 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) | |
1298 | { | |
1299 | d=(unsigned char *)s->init_buf->data; | |
1300 | p= &(d[4]); | |
1301 | ||
1302 | l=s->s3->tmp.new_cipher->algorithms; | |
1303 | ||
1304 | #ifndef NO_RSA | |
1305 | if (l & SSL_kRSA) | |
1306 | { | |
1307 | RSA *rsa; | |
dfeab068 | 1308 | unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
d02b48c6 RE |
1309 | |
1310 | if (s->session->cert->rsa_tmp != NULL) | |
1311 | rsa=s->session->cert->rsa_tmp; | |
1312 | else | |
1313 | { | |
1314 | pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509); | |
1315 | if ((pkey == NULL) || | |
1316 | (pkey->type != EVP_PKEY_RSA) || | |
1317 | (pkey->pkey.rsa == NULL)) | |
1318 | { | |
1319 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR); | |
1320 | goto err; | |
1321 | } | |
1322 | rsa=pkey->pkey.rsa; | |
1323 | } | |
1324 | ||
58964a49 RE |
1325 | tmp_buf[0]=s->version>>8; |
1326 | tmp_buf[1]=s->version&0xff; | |
d02b48c6 RE |
1327 | RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2); |
1328 | ||
1329 | s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; | |
1330 | ||
58964a49 RE |
1331 | q=p; |
1332 | /* Fix buf for TLS and beyond */ | |
1333 | if (s->version > SSL3_VERSION) | |
1334 | p+=2; | |
1335 | n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH, | |
1336 | tmp_buf,p,rsa,RSA_PKCS1_PADDING); | |
dfeab068 RE |
1337 | #ifdef PKCS1_CHECK |
1338 | if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; | |
1339 | if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; | |
1340 | #endif | |
d02b48c6 RE |
1341 | if (n <= 0) |
1342 | { | |
1343 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); | |
1344 | goto err; | |
1345 | } | |
1346 | ||
58964a49 RE |
1347 | /* Fix buf for TLS and beyond */ |
1348 | if (s->version > SSL3_VERSION) | |
1349 | { | |
1350 | s2n(n,q); | |
1351 | n+=2; | |
1352 | } | |
1353 | ||
d02b48c6 | 1354 | s->session->master_key_length= |
58964a49 | 1355 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 1356 | s->session->master_key, |
dfeab068 RE |
1357 | tmp_buf,SSL_MAX_MASTER_KEY_LENGTH); |
1358 | memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH); | |
d02b48c6 RE |
1359 | } |
1360 | else | |
1361 | #endif | |
1362 | #ifndef NO_DH | |
1363 | if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) | |
1364 | { | |
1365 | DH *dh_srvr,*dh_clnt; | |
1366 | ||
1367 | if (s->session->cert->dh_tmp != NULL) | |
1368 | dh_srvr=s->session->cert->dh_tmp; | |
1369 | else | |
1370 | { | |
1371 | /* we get them from the cert */ | |
58964a49 | 1372 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
d02b48c6 RE |
1373 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); |
1374 | goto err; | |
1375 | } | |
1376 | ||
1377 | /* generate a new random key */ | |
1378 | if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) | |
1379 | { | |
1380 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1381 | goto err; | |
1382 | } | |
1383 | if (!DH_generate_key(dh_clnt)) | |
1384 | { | |
1385 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1386 | goto err; | |
1387 | } | |
1388 | ||
1389 | /* use the 'p' output buffer for the DH key, but | |
1390 | * make sure to clear it out afterwards */ | |
58964a49 | 1391 | |
d02b48c6 | 1392 | n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); |
58964a49 | 1393 | |
d02b48c6 RE |
1394 | if (n <= 0) |
1395 | { | |
1396 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1397 | goto err; | |
1398 | } | |
1399 | ||
1400 | /* generate master key from the result */ | |
1401 | s->session->master_key_length= | |
58964a49 | 1402 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1403 | s->session->master_key,p,n); |
1404 | /* clean up */ | |
1405 | memset(p,0,n); | |
1406 | ||
1407 | /* send off the data */ | |
1408 | n=BN_num_bytes(dh_clnt->pub_key); | |
1409 | s2n(n,p); | |
1410 | BN_bn2bin(dh_clnt->pub_key,p); | |
1411 | n+=2; | |
1412 | ||
1413 | DH_free(dh_clnt); | |
1414 | ||
1415 | /* perhaps clean things up a bit EAY EAY EAY EAY*/ | |
1416 | } | |
1417 | else | |
1418 | #endif | |
1419 | { | |
58964a49 | 1420 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
d02b48c6 RE |
1421 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR); |
1422 | goto err; | |
1423 | } | |
1424 | ||
1425 | *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; | |
1426 | l2n3(n,d); | |
1427 | ||
1428 | s->state=SSL3_ST_CW_KEY_EXCH_B; | |
1429 | /* number of bytes to write */ | |
1430 | s->init_num=n+4; | |
1431 | s->init_off=0; | |
1432 | } | |
1433 | ||
1434 | /* SSL3_ST_CW_KEY_EXCH_B */ | |
1435 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1436 | err: | |
1437 | return(-1); | |
1438 | } | |
1439 | ||
1440 | static int ssl3_send_client_verify(s) | |
1441 | SSL *s; | |
1442 | { | |
1443 | unsigned char *p,*d; | |
1444 | unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
1445 | EVP_PKEY *pkey; | |
58964a49 | 1446 | int i=0; |
d02b48c6 | 1447 | unsigned long n; |
58964a49 RE |
1448 | #ifndef NO_DSA |
1449 | int j; | |
1450 | #endif | |
d02b48c6 RE |
1451 | |
1452 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) | |
1453 | { | |
1454 | d=(unsigned char *)s->init_buf->data; | |
1455 | p= &(d[4]); | |
1456 | pkey=s->cert->key->privatekey; | |
1457 | ||
58964a49 RE |
1458 | s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), |
1459 | &(data[MD5_DIGEST_LENGTH])); | |
d02b48c6 RE |
1460 | |
1461 | #ifndef NO_RSA | |
1462 | if (pkey->type == EVP_PKEY_RSA) | |
1463 | { | |
58964a49 RE |
1464 | s->method->ssl3_enc->cert_verify_mac(s, |
1465 | &(s->s3->finish_dgst1),&(data[0])); | |
d02b48c6 RE |
1466 | i=RSA_private_encrypt( |
1467 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, | |
1468 | data,&(p[2]),pkey->pkey.rsa, | |
1469 | RSA_PKCS1_PADDING); | |
1470 | if (i <= 0) | |
1471 | { | |
1472 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); | |
1473 | goto err; | |
1474 | } | |
1475 | s2n(i,p); | |
1476 | n=i+2; | |
1477 | } | |
1478 | else | |
1479 | #endif | |
1480 | #ifndef NO_DSA | |
1481 | if (pkey->type == EVP_PKEY_DSA) | |
1482 | { | |
1483 | if (!DSA_sign(pkey->save_type, | |
1484 | &(data[MD5_DIGEST_LENGTH]), | |
1485 | SHA_DIGEST_LENGTH,&(p[2]), | |
1486 | (unsigned int *)&j,pkey->pkey.dsa)) | |
1487 | { | |
1488 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); | |
1489 | goto err; | |
1490 | } | |
1491 | s2n(j,p); | |
1492 | n=j+2; | |
1493 | } | |
1494 | else | |
1495 | #endif | |
1496 | { | |
1497 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR); | |
1498 | goto err; | |
1499 | } | |
1500 | *(d++)=SSL3_MT_CERTIFICATE_VERIFY; | |
1501 | l2n3(n,d); | |
1502 | ||
1503 | s->init_num=(int)n+4; | |
1504 | s->init_off=0; | |
1505 | } | |
1506 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1507 | err: | |
1508 | return(-1); | |
1509 | } | |
1510 | ||
1511 | static int ssl3_send_client_certificate(s) | |
1512 | SSL *s; | |
1513 | { | |
1514 | X509 *x509=NULL; | |
1515 | EVP_PKEY *pkey=NULL; | |
1516 | int i; | |
1517 | unsigned long l; | |
1518 | ||
1519 | if (s->state == SSL3_ST_CW_CERT_A) | |
1520 | { | |
1521 | if ((s->cert == NULL) || | |
1522 | (s->cert->key->x509 == NULL) || | |
1523 | (s->cert->key->privatekey == NULL)) | |
1524 | s->state=SSL3_ST_CW_CERT_B; | |
1525 | else | |
1526 | s->state=SSL3_ST_CW_CERT_C; | |
1527 | } | |
1528 | ||
1529 | /* We need to get a client cert */ | |
1530 | if (s->state == SSL3_ST_CW_CERT_B) | |
1531 | { | |
1532 | /* If we get an error, we need to | |
1533 | * ssl->rwstate=SSL_X509_LOOKUP; return(-1); | |
1534 | * We then get retied later */ | |
1535 | i=0; | |
1536 | if (s->ctx->client_cert_cb != NULL) | |
1537 | i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); | |
1538 | if (i < 0) | |
1539 | { | |
1540 | s->rwstate=SSL_X509_LOOKUP; | |
1541 | return(-1); | |
1542 | } | |
1543 | s->rwstate=SSL_NOTHING; | |
1544 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) | |
1545 | { | |
1546 | s->state=SSL3_ST_CW_CERT_B; | |
1547 | if ( !SSL_use_certificate(s,x509) || | |
1548 | !SSL_use_PrivateKey(s,pkey)) | |
1549 | i=0; | |
1550 | } | |
1551 | else if (i == 1) | |
1552 | { | |
1553 | i=0; | |
1554 | SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); | |
1555 | } | |
1556 | ||
1557 | if (x509 != NULL) X509_free(x509); | |
1558 | if (pkey != NULL) EVP_PKEY_free(pkey); | |
1559 | if (i == 0) | |
1560 | { | |
58964a49 RE |
1561 | if (s->version == SSL3_VERSION) |
1562 | { | |
1563 | s->s3->tmp.cert_req=0; | |
1564 | ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); | |
1565 | return(1); | |
1566 | } | |
1567 | else | |
1568 | { | |
1569 | s->s3->tmp.cert_req=2; | |
1570 | } | |
d02b48c6 RE |
1571 | } |
1572 | ||
1573 | /* Ok, we have a cert */ | |
1574 | s->state=SSL3_ST_CW_CERT_C; | |
1575 | } | |
1576 | ||
1577 | if (s->state == SSL3_ST_CW_CERT_C) | |
1578 | { | |
1579 | s->state=SSL3_ST_CW_CERT_D; | |
58964a49 RE |
1580 | l=ssl3_output_cert_chain(s, |
1581 | (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); | |
d02b48c6 RE |
1582 | s->init_num=(int)l; |
1583 | s->init_off=0; | |
1584 | } | |
1585 | /* SSL3_ST_CW_CERT_D */ | |
1586 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1587 | } | |
1588 | ||
1589 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
1590 | ||
1591 | static int ssl3_check_cert_and_algorithm(s) | |
1592 | SSL *s; | |
1593 | { | |
1594 | int i,idx; | |
1595 | long algs; | |
1596 | EVP_PKEY *pkey=NULL; | |
1597 | CERT *c; | |
1598 | RSA *rsa; | |
1599 | DH *dh; | |
1600 | ||
1601 | c=s->session->cert; | |
1602 | ||
1603 | if (c == NULL) | |
1604 | { | |
1605 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR); | |
1606 | goto err; | |
1607 | } | |
1608 | ||
1609 | algs=s->s3->tmp.new_cipher->algorithms; | |
1610 | ||
1611 | /* we don't have a certificate */ | |
1612 | if (algs & (SSL_aDH|SSL_aNULL)) | |
1613 | return(1); | |
1614 | ||
1615 | rsa=s->session->cert->rsa_tmp; | |
1616 | dh=s->session->cert->dh_tmp; | |
1617 | ||
1618 | /* This is the passed certificate */ | |
1619 | ||
1620 | idx=c->cert_type; | |
1621 | pkey=X509_get_pubkey(c->pkeys[idx].x509); | |
1622 | i=X509_certificate_type(c->pkeys[idx].x509,pkey); | |
1623 | ||
1624 | ||
1625 | /* Check that we have a certificate if we require one */ | |
1626 | if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) | |
1627 | { | |
1628 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); | |
1629 | goto f_err; | |
1630 | } | |
1631 | #ifndef NO_DSA | |
1632 | else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) | |
1633 | { | |
1634 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); | |
1635 | goto f_err; | |
1636 | } | |
1637 | #endif | |
1638 | ||
1639 | if ((algs & SSL_kRSA) && | |
1640 | !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) | |
1641 | { | |
1642 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
1643 | goto f_err; | |
1644 | } | |
1645 | #ifndef NO_DH | |
1646 | else if ((algs & SSL_kEDH) && | |
1647 | !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) | |
1648 | { | |
1649 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); | |
1650 | goto f_err; | |
1651 | } | |
1652 | else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) | |
1653 | { | |
1654 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); | |
1655 | goto f_err; | |
1656 | } | |
1657 | #ifndef NO_DSA | |
1658 | else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) | |
1659 | { | |
1660 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); | |
1661 | goto f_err; | |
1662 | } | |
1663 | #endif | |
1664 | #endif | |
1665 | ||
1666 | if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP)) | |
1667 | { | |
1668 | #ifndef NO_RSA | |
1669 | if (algs & SSL_kRSA) | |
1670 | { | |
1671 | if ((rsa == NULL) || (RSA_size(rsa) > 512)) | |
1672 | { | |
1673 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
1674 | goto f_err; | |
1675 | } | |
1676 | } | |
1677 | else | |
1678 | #endif | |
1679 | #ifndef NO_DH | |
1680 | if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) | |
1681 | { | |
1682 | if ((dh == NULL) || (DH_size(dh) > 512)) | |
1683 | { | |
1684 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
1685 | goto f_err; | |
1686 | } | |
1687 | } | |
1688 | else | |
1689 | #endif | |
1690 | { | |
1691 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
1692 | goto f_err; | |
1693 | } | |
1694 | } | |
1695 | return(1); | |
1696 | f_err: | |
58964a49 | 1697 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
d02b48c6 RE |
1698 | err: |
1699 | return(0); | |
1700 | } | |
1701 |