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d02b48c6 | 1 | /* ssl/s2_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> | |
d02b48c6 RE |
60 | #include "rand.h" |
61 | #include "buffer.h" | |
62 | #include "objects.h" | |
63 | #include "ssl_locl.h" | |
64 | #include "evp.h" | |
65 | ||
66 | #ifndef NOPROTO | |
9b3086fe | 67 | static SSL_METHOD *ssl2_get_client_method(int ver); |
d02b48c6 RE |
68 | static int get_server_finished(SSL *s); |
69 | static int get_server_verify(SSL *s); | |
70 | static int get_server_hello(SSL *s); | |
71 | static int client_hello(SSL *s); | |
72 | static int client_master_key(SSL *s); | |
73 | static int client_finished(SSL *s); | |
74 | static int client_certificate(SSL *s); | |
75 | static int ssl_rsa_public_encrypt(CERT *c, int len, unsigned char *from, | |
76 | unsigned char *to,int padding); | |
77 | #else | |
9b3086fe | 78 | static SSL_METHOD *ssl2_get_client_method(); |
d02b48c6 RE |
79 | static int get_server_finished(); |
80 | static int get_server_verify(); | |
81 | static int get_server_hello(); | |
82 | static int client_hello(); | |
83 | static int client_master_key(); | |
84 | static int client_finished(); | |
85 | static int client_certificate(); | |
86 | static int ssl_rsa_public_encrypt(); | |
87 | #endif | |
88 | ||
89 | #define BREAK break | |
90 | ||
91 | static SSL_METHOD *ssl2_get_client_method(ver) | |
92 | int ver; | |
93 | { | |
58964a49 | 94 | if (ver == SSL2_VERSION) |
d02b48c6 RE |
95 | return(SSLv2_client_method()); |
96 | else | |
97 | return(NULL); | |
98 | } | |
99 | ||
100 | SSL_METHOD *SSLv2_client_method() | |
101 | { | |
102 | static int init=1; | |
103 | static SSL_METHOD SSLv2_client_data; | |
104 | ||
105 | if (init) | |
106 | { | |
107 | init=0; | |
108 | memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(), | |
109 | sizeof(SSL_METHOD)); | |
110 | SSLv2_client_data.ssl_connect=ssl2_connect; | |
111 | SSLv2_client_data.get_ssl_method=ssl2_get_client_method; | |
112 | } | |
113 | return(&SSLv2_client_data); | |
114 | } | |
115 | ||
116 | int ssl2_connect(s) | |
117 | SSL *s; | |
118 | { | |
119 | unsigned long l=time(NULL); | |
120 | BUF_MEM *buf=NULL; | |
121 | int ret= -1; | |
122 | void (*cb)()=NULL; | |
123 | int new_state,state; | |
124 | ||
bf5dcd13 | 125 | RAND_seed(&l,sizeof(l)); |
d02b48c6 | 126 | ERR_clear_error(); |
58964a49 | 127 | clear_sys_error(); |
d02b48c6 RE |
128 | |
129 | if (s->info_callback != NULL) | |
130 | cb=s->info_callback; | |
131 | else if (s->ctx->info_callback != NULL) | |
132 | cb=s->ctx->info_callback; | |
133 | ||
134 | /* init things to blank */ | |
135 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
136 | s->in_handshake++; | |
137 | ||
138 | for (;;) | |
139 | { | |
140 | state=s->state; | |
141 | ||
142 | switch (s->state) | |
143 | { | |
144 | case SSL_ST_BEFORE: | |
145 | case SSL_ST_CONNECT: | |
146 | case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
147 | case SSL_ST_OK|SSL_ST_CONNECT: | |
148 | ||
149 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
150 | ||
58964a49 | 151 | s->version=SSL2_VERSION; |
d02b48c6 RE |
152 | s->type=SSL_ST_CONNECT; |
153 | ||
154 | buf=s->init_buf; | |
155 | if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) | |
156 | { | |
157 | ret= -1; | |
158 | goto end; | |
159 | } | |
160 | if (!BUF_MEM_grow(buf, | |
161 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) | |
162 | { | |
163 | ret= -1; | |
164 | goto end; | |
165 | } | |
166 | s->init_buf=buf; | |
167 | s->init_num=0; | |
168 | s->state=SSL2_ST_SEND_CLIENT_HELLO_A; | |
169 | s->ctx->sess_connect++; | |
170 | s->handshake_func=ssl2_connect; | |
171 | BREAK; | |
172 | ||
173 | case SSL2_ST_SEND_CLIENT_HELLO_A: | |
174 | case SSL2_ST_SEND_CLIENT_HELLO_B: | |
175 | s->shutdown=0; | |
176 | ret=client_hello(s); | |
177 | if (ret <= 0) goto end; | |
178 | s->init_num=0; | |
179 | s->state=SSL2_ST_GET_SERVER_HELLO_A; | |
180 | BREAK; | |
181 | ||
182 | case SSL2_ST_GET_SERVER_HELLO_A: | |
183 | case SSL2_ST_GET_SERVER_HELLO_B: | |
184 | ret=get_server_hello(s); | |
185 | if (ret <= 0) goto end; | |
186 | s->init_num=0; | |
187 | if (!s->hit) /* new session */ | |
188 | { | |
189 | s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; | |
190 | BREAK; | |
191 | } | |
192 | else | |
193 | { | |
194 | s->state=SSL2_ST_CLIENT_START_ENCRYPTION; | |
195 | break; | |
196 | } | |
197 | ||
198 | case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: | |
199 | case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: | |
200 | ret=client_master_key(s); | |
201 | if (ret <= 0) goto end; | |
202 | s->init_num=0; | |
203 | s->state=SSL2_ST_CLIENT_START_ENCRYPTION; | |
204 | break; | |
205 | ||
206 | case SSL2_ST_CLIENT_START_ENCRYPTION: | |
207 | /* Ok, we now have all the stuff needed to | |
208 | * start encrypting, so lets fire it up :-) */ | |
209 | if (!ssl2_enc_init(s,1)) | |
210 | { | |
211 | ret= -1; | |
212 | goto end; | |
213 | } | |
214 | s->s2->clear_text=0; | |
215 | s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; | |
216 | break; | |
217 | ||
218 | case SSL2_ST_SEND_CLIENT_FINISHED_A: | |
219 | case SSL2_ST_SEND_CLIENT_FINISHED_B: | |
220 | ret=client_finished(s); | |
221 | if (ret <= 0) goto end; | |
222 | s->init_num=0; | |
223 | s->state=SSL2_ST_GET_SERVER_VERIFY_A; | |
224 | break; | |
225 | ||
226 | case SSL2_ST_GET_SERVER_VERIFY_A: | |
227 | case SSL2_ST_GET_SERVER_VERIFY_B: | |
228 | ret=get_server_verify(s); | |
229 | if (ret <= 0) goto end; | |
230 | s->init_num=0; | |
231 | s->state=SSL2_ST_GET_SERVER_FINISHED_A; | |
232 | break; | |
233 | ||
234 | case SSL2_ST_GET_SERVER_FINISHED_A: | |
235 | case SSL2_ST_GET_SERVER_FINISHED_B: | |
236 | ret=get_server_finished(s); | |
237 | if (ret <= 0) goto end; | |
238 | break; | |
239 | ||
240 | case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: | |
241 | case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: | |
242 | case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: | |
243 | case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: | |
244 | case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: | |
245 | ret=client_certificate(s); | |
246 | if (ret <= 0) goto end; | |
247 | s->init_num=0; | |
248 | s->state=SSL2_ST_GET_SERVER_FINISHED_A; | |
249 | break; | |
250 | ||
251 | case SSL_ST_OK: | |
252 | BUF_MEM_free(s->init_buf); | |
253 | s->init_buf=NULL; | |
254 | s->init_num=0; | |
255 | /* ERR_clear_error();*/ | |
256 | ||
257 | /* If we want to cache session-ids in the client | |
258 | * and we sucessfully add the session-id to the | |
259 | * cache, and there is a callback, then pass it out. | |
260 | * 26/11/96 - eay - only add if not a re-used session. | |
261 | */ | |
262 | ||
263 | ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); | |
58964a49 | 264 | if (s->hit) s->ctx->sess_hit++; |
d02b48c6 RE |
265 | |
266 | ret=1; | |
267 | /* s->server=0; */ | |
268 | s->ctx->sess_connect_good++; | |
269 | ||
270 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
271 | ||
272 | goto end; | |
dfeab068 | 273 | /* break; */ |
d02b48c6 RE |
274 | default: |
275 | SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); | |
276 | return(-1); | |
277 | /* break; */ | |
278 | } | |
279 | ||
280 | if ((cb != NULL) && (s->state != state)) | |
281 | { | |
282 | new_state=s->state; | |
283 | s->state=state; | |
284 | cb(s,SSL_CB_CONNECT_LOOP,1); | |
285 | s->state=new_state; | |
286 | } | |
287 | } | |
288 | end: | |
289 | s->in_handshake--; | |
290 | if (cb != NULL) | |
291 | cb(s,SSL_CB_CONNECT_EXIT,ret); | |
292 | return(ret); | |
293 | } | |
294 | ||
295 | static int get_server_hello(s) | |
296 | SSL *s; | |
297 | { | |
298 | unsigned char *buf; | |
299 | unsigned char *p; | |
300 | int i,j; | |
58964a49 | 301 | STACK *sk=NULL,*cl; |
d02b48c6 RE |
302 | |
303 | buf=(unsigned char *)s->init_buf->data; | |
304 | p=buf; | |
305 | if (s->state == SSL2_ST_GET_SERVER_HELLO_A) | |
306 | { | |
307 | i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); | |
308 | if (i < (11-s->init_num)) | |
309 | return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); | |
310 | ||
311 | if (*(p++) != SSL2_MT_SERVER_HELLO) | |
312 | { | |
313 | if (p[-1] != SSL2_MT_ERROR) | |
314 | { | |
315 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
316 | SSLerr(SSL_F_GET_SERVER_HELLO, | |
317 | SSL_R_READ_WRONG_PACKET_TYPE); | |
318 | } | |
319 | else | |
320 | SSLerr(SSL_F_GET_SERVER_HELLO, | |
321 | SSL_R_PEER_ERROR); | |
322 | return(-1); | |
323 | } | |
324 | s->hit=(*(p++))?1:0; | |
325 | s->s2->tmp.cert_type= *(p++); | |
326 | n2s(p,i); | |
327 | if (i < s->version) s->version=i; | |
328 | n2s(p,i); s->s2->tmp.cert_length=i; | |
329 | n2s(p,i); s->s2->tmp.csl=i; | |
330 | n2s(p,i); s->s2->tmp.conn_id_length=i; | |
331 | s->state=SSL2_ST_GET_SERVER_HELLO_B; | |
332 | s->init_num=0; | |
333 | } | |
334 | ||
335 | /* SSL2_ST_GET_SERVER_HELLO_B */ | |
336 | j=s->s2->tmp.cert_length+s->s2->tmp.csl+s->s2->tmp.conn_id_length | |
337 | - s->init_num; | |
338 | i=ssl2_read(s,(char *)&(buf[s->init_num]),j); | |
339 | if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); | |
340 | ||
341 | /* things are looking good */ | |
342 | ||
343 | p=buf; | |
344 | if (s->hit) | |
345 | { | |
346 | if (s->s2->tmp.cert_length != 0) | |
347 | { | |
348 | SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); | |
349 | return(-1); | |
350 | } | |
351 | if (s->s2->tmp.cert_type != 0) | |
352 | { | |
58964a49 | 353 | if (!(s->options & |
d02b48c6 RE |
354 | SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) |
355 | { | |
356 | SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); | |
357 | return(-1); | |
358 | } | |
359 | } | |
360 | if (s->s2->tmp.csl != 0) | |
361 | { | |
362 | SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); | |
363 | return(-1); | |
364 | } | |
365 | } | |
366 | else | |
367 | { | |
368 | #ifdef undef | |
369 | /* very bad */ | |
370 | memset(s->session->session_id,0, | |
371 | SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); | |
372 | s->session->session_id_length=0; | |
373 | */ | |
374 | #endif | |
375 | ||
376 | /* we need to do this incase we were trying to reuse a | |
377 | * client session but others are already reusing it. | |
378 | * If this was a new 'blank' session ID, the session-id | |
379 | * length will still be 0 */ | |
380 | if (s->session->session_id_length > 0) | |
381 | { | |
382 | if (!ssl_get_new_session(s,0)) | |
383 | { | |
384 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
385 | return(-1); | |
386 | } | |
387 | } | |
388 | ||
389 | if (ssl2_set_certificate(s,s->s2->tmp.cert_type, | |
390 | s->s2->tmp.cert_length,p) <= 0) | |
391 | { | |
392 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); | |
393 | return(-1); | |
394 | } | |
395 | p+=s->s2->tmp.cert_length; | |
396 | ||
397 | if (s->s2->tmp.csl == 0) | |
398 | { | |
399 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
400 | SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); | |
401 | return(-1); | |
402 | } | |
403 | ||
404 | /* We have just received a list of ciphers back from the | |
405 | * server. We need to get the ones that match, then select | |
406 | * the one we want the most :-). */ | |
407 | ||
408 | /* load the ciphers */ | |
409 | sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, | |
410 | &s->session->ciphers); | |
411 | p+=s->s2->tmp.csl; | |
412 | if (sk == NULL) | |
413 | { | |
414 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
415 | SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); | |
416 | return(-1); | |
417 | } | |
418 | ||
419 | sk_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); | |
420 | ||
421 | /* get the array of ciphers we will accept */ | |
422 | cl=ssl_get_ciphers_by_id(s); | |
423 | ||
424 | /* In theory we could have ciphers sent back that we | |
425 | * don't want to use but that does not matter since we | |
426 | * will check against the list we origionally sent and | |
427 | * for performance reasons we should not bother to match | |
428 | * the two lists up just to check. */ | |
429 | for (i=0; i<sk_num(cl); i++) | |
430 | { | |
431 | if (sk_find(sk,sk_value(cl,i)) >= 0) | |
432 | break; | |
433 | } | |
434 | ||
435 | if (i >= sk_num(cl)) | |
436 | { | |
437 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
438 | SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); | |
439 | return(-1); | |
440 | } | |
441 | s->session->cipher=(SSL_CIPHER *)sk_value(cl,i); | |
442 | } | |
443 | ||
444 | if ((s->session != NULL) && (s->session->peer != NULL)) | |
445 | X509_free(s->session->peer); | |
446 | ||
447 | /* hmmm, can we have the problem of the other session with this | |
448 | * cert, Free's it before we increment the reference count. */ | |
449 | CRYPTO_w_lock(CRYPTO_LOCK_X509); | |
450 | s->session->peer=s->session->cert->key->x509; | |
58964a49 | 451 | CRYPTO_add(&s->session->peer->references,1,CRYPTO_LOCK_X509); |
d02b48c6 RE |
452 | CRYPTO_w_unlock(CRYPTO_LOCK_X509); |
453 | ||
454 | s->s2->conn_id_length=s->s2->tmp.conn_id_length; | |
455 | memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); | |
456 | return(1); | |
457 | } | |
458 | ||
459 | static int client_hello(s) | |
460 | SSL *s; | |
461 | { | |
462 | unsigned char *buf; | |
463 | unsigned char *p,*d; | |
464 | /* CIPHER **cipher;*/ | |
465 | int i,n,j; | |
466 | ||
467 | buf=(unsigned char *)s->init_buf->data; | |
468 | if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) | |
469 | { | |
470 | if ((s->session == NULL) || | |
471 | (s->session->ssl_version != s->version)) | |
472 | { | |
473 | if (!ssl_get_new_session(s,0)) | |
474 | { | |
475 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
476 | return(-1); | |
477 | } | |
478 | } | |
479 | /* else use the pre-loaded session */ | |
480 | ||
481 | p=buf; /* header */ | |
482 | d=p+9; /* data section */ | |
483 | *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ | |
484 | s2n(SSL2_CLIENT_VERSION,p); /* version */ | |
485 | n=j=0; | |
486 | ||
487 | n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d); | |
488 | d+=n; | |
489 | ||
490 | if (n == 0) | |
491 | { | |
492 | SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); | |
493 | return(-1); | |
494 | } | |
495 | ||
496 | s2n(n,p); /* cipher spec num bytes */ | |
497 | ||
498 | if ((s->session->session_id_length > 0) && | |
499 | (s->session->session_id_length <= | |
500 | SSL2_MAX_SSL_SESSION_ID_LENGTH)) | |
501 | { | |
502 | i=s->session->session_id_length; | |
503 | s2n(i,p); /* session id length */ | |
504 | memcpy(d,s->session->session_id,(unsigned int)i); | |
505 | d+=i; | |
506 | } | |
507 | else | |
508 | { | |
509 | s2n(0,p); | |
510 | } | |
511 | ||
512 | s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; | |
513 | s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ | |
514 | /*challenge id data*/ | |
515 | RAND_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH); | |
516 | memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH); | |
517 | d+=SSL2_CHALLENGE_LENGTH; | |
518 | ||
519 | s->state=SSL2_ST_SEND_CLIENT_HELLO_B; | |
520 | s->init_num=d-buf; | |
521 | s->init_off=0; | |
522 | } | |
523 | /* SSL2_ST_SEND_CLIENT_HELLO_B */ | |
524 | return(ssl2_do_write(s)); | |
525 | } | |
526 | ||
527 | static int client_master_key(s) | |
528 | SSL *s; | |
529 | { | |
530 | unsigned char *buf; | |
531 | unsigned char *p,*d; | |
532 | int clear,enc,karg,i; | |
533 | SSL_SESSION *sess; | |
534 | EVP_CIPHER *c; | |
535 | EVP_MD *md; | |
536 | ||
537 | buf=(unsigned char *)s->init_buf->data; | |
538 | if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) | |
539 | { | |
540 | ||
541 | if (!ssl_cipher_get_evp(s->session->cipher,&c,&md)) | |
542 | { | |
543 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
544 | SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); | |
545 | return(-1); | |
546 | } | |
547 | sess=s->session; | |
548 | p=buf; | |
549 | d=p+10; | |
550 | *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */ | |
551 | ||
552 | i=ssl_put_cipher_by_char(s,sess->cipher,p); | |
553 | p+=i; | |
554 | ||
555 | /* make key_arg data */ | |
556 | i=EVP_CIPHER_iv_length(c); | |
557 | sess->key_arg_length=i; | |
558 | if (i > 0) RAND_bytes(sess->key_arg,i); | |
559 | ||
560 | /* make a master key */ | |
561 | i=EVP_CIPHER_key_length(c); | |
562 | sess->master_key_length=i; | |
563 | if (i > 0) RAND_bytes(sess->master_key,i); | |
564 | ||
565 | if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) | |
566 | enc=8; | |
567 | else if (sess->cipher->algorithms & SSL_EXP) | |
568 | enc=5; | |
569 | else | |
570 | enc=i; | |
571 | ||
572 | if (i < enc) | |
573 | { | |
574 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
575 | SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); | |
576 | return(-1); | |
577 | } | |
578 | clear=i-enc; | |
579 | s2n(clear,p); | |
580 | memcpy(d,sess->master_key,(unsigned int)clear); | |
581 | d+=clear; | |
582 | ||
583 | enc=ssl_rsa_public_encrypt(sess->cert,enc, | |
584 | &(sess->master_key[clear]),d, | |
585 | (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); | |
586 | if (enc <= 0) | |
587 | { | |
588 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
589 | SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); | |
590 | return(-1); | |
591 | } | |
dfeab068 RE |
592 | #ifdef PKCS1_CHECK |
593 | if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; | |
594 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
595 | sess->master_key[clear]++; | |
596 | #endif | |
d02b48c6 RE |
597 | s2n(enc,p); |
598 | d+=enc; | |
599 | karg=sess->key_arg_length; | |
600 | s2n(karg,p); /* key arg size */ | |
601 | memcpy(d,sess->key_arg,(unsigned int)karg); | |
602 | d+=karg; | |
603 | ||
604 | s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; | |
605 | s->init_num=d-buf; | |
606 | s->init_off=0; | |
607 | } | |
608 | ||
609 | /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ | |
610 | return(ssl2_do_write(s)); | |
611 | } | |
612 | ||
613 | static int client_finished(s) | |
614 | SSL *s; | |
615 | { | |
616 | unsigned char *p; | |
617 | ||
618 | if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) | |
619 | { | |
620 | p=(unsigned char *)s->init_buf->data; | |
621 | *(p++)=SSL2_MT_CLIENT_FINISHED; | |
622 | memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); | |
623 | ||
624 | s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; | |
625 | s->init_num=s->s2->conn_id_length+1; | |
626 | s->init_off=0; | |
627 | } | |
628 | return(ssl2_do_write(s)); | |
629 | } | |
630 | ||
631 | /* read the data and then respond */ | |
632 | static int client_certificate(s) | |
633 | SSL *s; | |
634 | { | |
635 | unsigned char *buf; | |
636 | unsigned char *p,*d; | |
637 | int i; | |
638 | unsigned int n; | |
639 | int cert_ch_len=0; | |
640 | unsigned char *cert_ch; | |
641 | ||
642 | buf=(unsigned char *)s->init_buf->data; | |
643 | cert_ch= &(buf[2]); | |
644 | ||
645 | /* We have a cert associated with the SSL, so attach it to | |
646 | * the session if it does not have one */ | |
647 | ||
648 | if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) | |
649 | { | |
650 | i=ssl2_read(s,(char *)&(buf[s->init_num]), | |
651 | SSL2_MAX_CERT_CHALLENGE_LENGTH+1-s->init_num); | |
652 | if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+1-s->init_num)) | |
653 | return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); | |
654 | ||
655 | /* type=buf[0]; */ | |
656 | /* type eq x509 */ | |
657 | if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) | |
658 | { | |
659 | ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); | |
660 | SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); | |
661 | return(-1); | |
662 | } | |
663 | cert_ch_len=i-1; | |
664 | ||
665 | if ((s->cert == NULL) || | |
666 | (s->cert->key->x509 == NULL) || | |
667 | (s->cert->key->privatekey == NULL)) | |
668 | { | |
669 | s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; | |
670 | } | |
671 | else | |
672 | s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; | |
673 | } | |
674 | ||
675 | if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) | |
676 | { | |
677 | X509 *x509=NULL; | |
678 | EVP_PKEY *pkey=NULL; | |
679 | ||
680 | /* If we get an error we need to | |
681 | * ssl->rwstate=SSL_X509_LOOKUP; | |
682 | * return(error); | |
683 | * We should then be retried when things are ok and we | |
684 | * can get a cert or not */ | |
685 | ||
686 | i=0; | |
687 | if (s->ctx->client_cert_cb != NULL) | |
688 | { | |
689 | i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); | |
690 | } | |
691 | ||
692 | if (i < 0) | |
693 | { | |
694 | s->rwstate=SSL_X509_LOOKUP; | |
695 | return(-1); | |
696 | } | |
697 | s->rwstate=SSL_NOTHING; | |
698 | ||
699 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) | |
700 | { | |
701 | s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; | |
702 | if ( !SSL_use_certificate(s,x509) || | |
703 | !SSL_use_PrivateKey(s,pkey)) | |
704 | { | |
705 | i=0; | |
706 | } | |
707 | X509_free(x509); | |
708 | EVP_PKEY_free(pkey); | |
709 | } | |
710 | else if (i == 1) | |
711 | { | |
712 | if (x509 != NULL) X509_free(x509); | |
713 | if (pkey != NULL) EVP_PKEY_free(pkey); | |
714 | SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); | |
715 | i=0; | |
716 | } | |
717 | ||
718 | if (i == 0) | |
719 | { | |
720 | /* We have no client certificate to respond with | |
721 | * so send the correct error message back */ | |
722 | s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; | |
723 | p=buf; | |
724 | *(p++)=SSL2_MT_ERROR; | |
725 | s2n(SSL2_PE_NO_CERTIFICATE,p); | |
726 | s->init_off=0; | |
727 | s->init_num=3; | |
728 | /* Write is done at the end */ | |
729 | } | |
730 | } | |
731 | ||
732 | if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) | |
733 | { | |
734 | return(ssl2_do_write(s)); | |
735 | } | |
736 | ||
737 | if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) | |
738 | { | |
739 | EVP_MD_CTX ctx; | |
740 | ||
741 | /* ok, now we calculate the checksum | |
742 | * do it first so we can reuse buf :-) */ | |
743 | p=buf; | |
58964a49 | 744 | EVP_SignInit(&ctx,s->ctx->rsa_md5); |
d02b48c6 RE |
745 | EVP_SignUpdate(&ctx,s->s2->key_material, |
746 | (unsigned int)s->s2->key_material_length); | |
747 | EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); | |
748 | n=i2d_X509(s->session->cert->key->x509,&p); | |
749 | EVP_SignUpdate(&ctx,buf,(unsigned int)n); | |
750 | ||
751 | p=buf; | |
752 | d=p+6; | |
753 | *(p++)=SSL2_MT_CLIENT_CERTIFICATE; | |
754 | *(p++)=SSL2_CT_X509_CERTIFICATE; | |
755 | n=i2d_X509(s->cert->key->x509,&d); | |
756 | s2n(n,p); | |
757 | ||
758 | if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) | |
759 | { | |
760 | /* this is not good. If things have failed it | |
761 | * means there so something wrong with the key. | |
762 | * We will contiune with a 0 length signature | |
763 | */ | |
764 | } | |
765 | memset(&ctx,0,sizeof(ctx)); | |
766 | s2n(n,p); | |
767 | d+=n; | |
768 | ||
769 | s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; | |
770 | s->init_num=d-buf; | |
771 | s->init_off=0; | |
772 | } | |
773 | /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ | |
774 | return(ssl2_do_write(s)); | |
775 | } | |
776 | ||
777 | static int get_server_verify(s) | |
778 | SSL *s; | |
779 | { | |
780 | unsigned char *p; | |
781 | int i; | |
782 | ||
783 | p=(unsigned char *)s->init_buf->data; | |
784 | if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) | |
785 | { | |
786 | i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); | |
787 | if (i < (1-s->init_num)) | |
788 | return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); | |
789 | ||
790 | s->state= SSL2_ST_GET_SERVER_VERIFY_B; | |
791 | s->init_num=0; | |
792 | if (*p != SSL2_MT_SERVER_VERIFY) | |
793 | { | |
794 | if (p[0] != SSL2_MT_ERROR) | |
795 | { | |
796 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
797 | SSLerr(SSL_F_GET_SERVER_VERIFY, | |
798 | SSL_R_READ_WRONG_PACKET_TYPE); | |
799 | } | |
800 | else | |
801 | SSLerr(SSL_F_GET_SERVER_VERIFY, | |
802 | SSL_R_PEER_ERROR); | |
803 | return(-1); | |
804 | } | |
805 | } | |
806 | ||
807 | p=(unsigned char *)s->init_buf->data; | |
808 | i=ssl2_read(s,(char *)&(p[s->init_num]), | |
809 | (unsigned int)s->s2->challenge_length-s->init_num); | |
810 | if (i < ((int)s->s2->challenge_length-s->init_num)) | |
811 | return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); | |
812 | if (memcmp(p,s->s2->challenge,(unsigned int)s->s2->challenge_length) != 0) | |
813 | { | |
814 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
815 | SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); | |
816 | return(-1); | |
817 | } | |
818 | return(1); | |
819 | } | |
820 | ||
821 | static int get_server_finished(s) | |
822 | SSL *s; | |
823 | { | |
824 | unsigned char *buf; | |
825 | unsigned char *p; | |
826 | int i; | |
827 | ||
828 | buf=(unsigned char *)s->init_buf->data; | |
829 | p=buf; | |
830 | if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) | |
831 | { | |
832 | i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); | |
833 | if (i < (1-s->init_num)) | |
834 | return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); | |
835 | s->init_num=i; | |
836 | if (*p == SSL2_MT_REQUEST_CERTIFICATE) | |
837 | { | |
838 | s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; | |
839 | return(1); | |
840 | } | |
841 | else if (*p != SSL2_MT_SERVER_FINISHED) | |
842 | { | |
843 | if (p[0] != SSL2_MT_ERROR) | |
844 | { | |
845 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
846 | SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); | |
847 | } | |
848 | else | |
849 | SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); | |
850 | return(-1); | |
851 | } | |
852 | s->state=SSL_ST_OK; | |
853 | s->init_num=0; | |
854 | } | |
855 | ||
856 | i=ssl2_read(s,(char *)&(buf[s->init_num]), | |
857 | SSL2_SSL_SESSION_ID_LENGTH-s->init_num); | |
858 | if (i < (SSL2_SSL_SESSION_ID_LENGTH-s->init_num)) | |
859 | return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); | |
860 | ||
861 | if (!s->hit) /* new session */ | |
862 | { | |
863 | /* new session-id */ | |
58964a49 RE |
864 | /* Make sure we were not trying to re-use an old SSL_SESSION |
865 | * or bad things can happen */ | |
866 | /* ZZZZZZZZZZZZZ */ | |
d02b48c6 RE |
867 | s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; |
868 | memcpy(s->session->session_id,p,SSL2_SSL_SESSION_ID_LENGTH); | |
869 | } | |
870 | else | |
871 | { | |
58964a49 | 872 | if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) |
d02b48c6 RE |
873 | { |
874 | if (memcmp(buf,s->session->session_id, | |
875 | (unsigned int)s->session->session_id_length) != 0) | |
876 | { | |
877 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
878 | SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); | |
879 | return(-1); | |
880 | } | |
881 | } | |
882 | } | |
883 | return(1); | |
884 | } | |
885 | ||
886 | /* loads in the certificate from the server */ | |
887 | int ssl2_set_certificate(s, type, len, data) | |
888 | SSL *s; | |
889 | int type; | |
890 | int len; | |
891 | unsigned char *data; | |
892 | { | |
893 | STACK *sk=NULL; | |
894 | EVP_PKEY *pkey=NULL; | |
895 | CERT *c=NULL; | |
896 | int i; | |
897 | X509 *x509=NULL; | |
898 | int ret=0; | |
899 | ||
900 | x509=d2i_X509(NULL,&data,(long)len); | |
901 | if (x509 == NULL) | |
902 | { | |
903 | SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); | |
904 | goto err; | |
905 | } | |
906 | ||
907 | if (((sk=sk_new_null()) == NULL) || | |
908 | (!sk_push(sk,(char *)x509))) | |
909 | { | |
910 | SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
911 | goto err; | |
912 | } | |
913 | ||
914 | i=ssl_verify_cert_chain(s,sk); | |
915 | ||
916 | if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) | |
917 | { | |
918 | SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); | |
919 | goto err; | |
920 | } | |
921 | ||
922 | /* cert for ssl */ | |
923 | c=ssl_cert_new(); | |
924 | if (c == NULL) | |
925 | { | |
926 | ret= -1; | |
927 | goto err; | |
928 | } | |
929 | ||
930 | /* cert for session */ | |
931 | if (s->session->cert) ssl_cert_free(s->session->cert); | |
932 | s->session->cert=c; | |
933 | ||
934 | /* c->cert_type=type; */ | |
935 | ||
936 | c->pkeys[SSL_PKEY_RSA_ENC].x509=x509; | |
937 | c->key= &(c->pkeys[SSL_PKEY_RSA_ENC]); | |
938 | ||
939 | pkey=X509_get_pubkey(x509); | |
940 | x509=NULL; | |
941 | if (pkey == NULL) | |
942 | { | |
943 | SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); | |
944 | goto err; | |
945 | } | |
946 | if (pkey->type != EVP_PKEY_RSA) | |
947 | { | |
948 | SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); | |
949 | goto err; | |
950 | } | |
951 | ||
952 | if (!ssl_set_cert_type(c,SSL2_CT_X509_CERTIFICATE)) | |
953 | goto err; | |
954 | ret=1; | |
955 | err: | |
956 | if (sk != NULL) sk_free(sk); | |
957 | if (x509 != NULL) X509_free(x509); | |
958 | return(ret); | |
959 | } | |
960 | ||
961 | static int ssl_rsa_public_encrypt(c, len, from, to, padding) | |
962 | CERT *c; | |
963 | int len; | |
964 | unsigned char *from; | |
965 | unsigned char *to; | |
966 | int padding; | |
967 | { | |
968 | EVP_PKEY *pkey=NULL; | |
969 | int i= -1; | |
970 | ||
971 | if ((c == NULL) || (c->key->x509 == NULL) || | |
972 | ((pkey=X509_get_pubkey(c->key->x509)) == NULL)) | |
973 | { | |
974 | SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); | |
975 | return(-1); | |
976 | } | |
977 | if (pkey->type != EVP_PKEY_RSA) | |
978 | { | |
979 | SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); | |
980 | goto end; | |
981 | } | |
982 | ||
983 | /* we have the public key */ | |
984 | i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); | |
985 | if (i < 0) | |
986 | SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); | |
987 | end: | |
988 | return(i); | |
989 | } | |
990 |