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d02b48c6 | 1 | /* ssl/s2_srvr.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 | */ | |
cf82191d BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
d02b48c6 | 111 | |
aa82db4f | 112 | #include "ssl_locl.h" |
bc36ee62 | 113 | #ifndef OPENSSL_NO_SSL2 |
d02b48c6 | 114 | #include <stdio.h> |
ec577822 BM |
115 | #include <openssl/bio.h> |
116 | #include <openssl/rand.h> | |
117 | #include <openssl/objects.h> | |
ec577822 | 118 | #include <openssl/evp.h> |
c046fffa | 119 | #include "cryptlib.h" |
d02b48c6 | 120 | |
9b3086fe | 121 | static SSL_METHOD *ssl2_get_server_method(int ver); |
d02b48c6 RE |
122 | static int get_client_master_key(SSL *s); |
123 | static int get_client_hello(SSL *s); | |
124 | static int server_hello(SSL *s); | |
125 | static int get_client_finished(SSL *s); | |
126 | static int server_verify(SSL *s); | |
127 | static int server_finish(SSL *s); | |
128 | static int request_certificate(SSL *s); | |
129 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, | |
130 | unsigned char *to,int padding); | |
d02b48c6 RE |
131 | #define BREAK break |
132 | ||
6b691a5c | 133 | static SSL_METHOD *ssl2_get_server_method(int ver) |
d02b48c6 | 134 | { |
58964a49 | 135 | if (ver == SSL2_VERSION) |
d02b48c6 RE |
136 | return(SSLv2_server_method()); |
137 | else | |
138 | return(NULL); | |
139 | } | |
140 | ||
6b691a5c | 141 | SSL_METHOD *SSLv2_server_method(void) |
d02b48c6 RE |
142 | { |
143 | static int init=1; | |
144 | static SSL_METHOD SSLv2_server_data; | |
145 | ||
146 | if (init) | |
147 | { | |
e78f1378 BM |
148 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); |
149 | ||
b8565a9a BM |
150 | if (init) |
151 | { | |
152 | memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(), | |
153 | sizeof(SSL_METHOD)); | |
154 | SSLv2_server_data.ssl_accept=ssl2_accept; | |
155 | SSLv2_server_data.get_ssl_method=ssl2_get_server_method; | |
156 | init=0; | |
157 | } | |
e78f1378 BM |
158 | |
159 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); | |
d02b48c6 RE |
160 | } |
161 | return(&SSLv2_server_data); | |
162 | } | |
163 | ||
6b691a5c | 164 | int ssl2_accept(SSL *s) |
d02b48c6 RE |
165 | { |
166 | unsigned long l=time(NULL); | |
167 | BUF_MEM *buf=NULL; | |
168 | int ret= -1; | |
169 | long num1; | |
45d87a1f | 170 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
171 | int new_state,state; |
172 | ||
eb952088 | 173 | RAND_add(&l,sizeof(l),0); |
d02b48c6 | 174 | ERR_clear_error(); |
58964a49 | 175 | clear_sys_error(); |
d02b48c6 RE |
176 | |
177 | if (s->info_callback != NULL) | |
178 | cb=s->info_callback; | |
179 | else if (s->ctx->info_callback != NULL) | |
180 | cb=s->ctx->info_callback; | |
181 | ||
182 | /* init things to blank */ | |
d02b48c6 | 183 | s->in_handshake++; |
979689aa | 184 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 185 | |
b56bce4f | 186 | if (s->cert == NULL) |
d02b48c6 RE |
187 | { |
188 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
189 | return(-1); | |
190 | } | |
191 | ||
58964a49 | 192 | clear_sys_error(); |
d02b48c6 RE |
193 | for (;;) |
194 | { | |
195 | state=s->state; | |
196 | ||
197 | switch (s->state) | |
198 | { | |
199 | case SSL_ST_BEFORE: | |
200 | case SSL_ST_ACCEPT: | |
201 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
202 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
203 | ||
413c4f45 | 204 | s->server=1; |
d02b48c6 RE |
205 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
206 | ||
58964a49 | 207 | s->version=SSL2_VERSION; |
d02b48c6 RE |
208 | s->type=SSL_ST_ACCEPT; |
209 | ||
210 | buf=s->init_buf; | |
211 | if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) | |
212 | { ret= -1; goto end; } | |
213 | if (!BUF_MEM_grow(buf,(int) | |
214 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) | |
215 | { ret= -1; goto end; } | |
216 | s->init_buf=buf; | |
217 | s->init_num=0; | |
413c4f45 | 218 | s->ctx->stats.sess_accept++; |
d02b48c6 RE |
219 | s->handshake_func=ssl2_accept; |
220 | s->state=SSL2_ST_GET_CLIENT_HELLO_A; | |
221 | BREAK; | |
222 | ||
223 | case SSL2_ST_GET_CLIENT_HELLO_A: | |
224 | case SSL2_ST_GET_CLIENT_HELLO_B: | |
225 | case SSL2_ST_GET_CLIENT_HELLO_C: | |
226 | s->shutdown=0; | |
227 | ret=get_client_hello(s); | |
228 | if (ret <= 0) goto end; | |
229 | s->init_num=0; | |
230 | s->state=SSL2_ST_SEND_SERVER_HELLO_A; | |
231 | BREAK; | |
232 | ||
233 | case SSL2_ST_SEND_SERVER_HELLO_A: | |
234 | case SSL2_ST_SEND_SERVER_HELLO_B: | |
235 | ret=server_hello(s); | |
236 | if (ret <= 0) goto end; | |
237 | s->init_num=0; | |
238 | if (!s->hit) | |
239 | { | |
240 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A; | |
241 | BREAK; | |
242 | } | |
243 | else | |
244 | { | |
245 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; | |
246 | BREAK; | |
247 | } | |
248 | case SSL2_ST_GET_CLIENT_MASTER_KEY_A: | |
249 | case SSL2_ST_GET_CLIENT_MASTER_KEY_B: | |
250 | ret=get_client_master_key(s); | |
251 | if (ret <= 0) goto end; | |
252 | s->init_num=0; | |
253 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; | |
254 | BREAK; | |
255 | ||
256 | case SSL2_ST_SERVER_START_ENCRYPTION: | |
257 | /* Ok we how have sent all the stuff needed to | |
258 | * start encrypting, the next packet back will | |
259 | * be encrypted. */ | |
260 | if (!ssl2_enc_init(s,0)) | |
261 | { ret= -1; goto end; } | |
262 | s->s2->clear_text=0; | |
263 | s->state=SSL2_ST_SEND_SERVER_VERIFY_A; | |
264 | BREAK; | |
265 | ||
266 | case SSL2_ST_SEND_SERVER_VERIFY_A: | |
267 | case SSL2_ST_SEND_SERVER_VERIFY_B: | |
268 | ret=server_verify(s); | |
269 | if (ret <= 0) goto end; | |
270 | s->init_num=0; | |
271 | if (s->hit) | |
272 | { | |
273 | /* If we are in here, we have been | |
274 | * buffering the output, so we need to | |
275 | * flush it and remove buffering from | |
276 | * future traffic */ | |
277 | s->state=SSL2_ST_SEND_SERVER_VERIFY_C; | |
278 | BREAK; | |
279 | } | |
280 | else | |
281 | { | |
282 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; | |
283 | break; | |
284 | } | |
285 | ||
286 | case SSL2_ST_SEND_SERVER_VERIFY_C: | |
287 | /* get the number of bytes to write */ | |
288 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
289 | if (num1 != 0) | |
290 | { | |
291 | s->rwstate=SSL_WRITING; | |
292 | num1=BIO_flush(s->wbio); | |
293 | if (num1 <= 0) { ret= -1; goto end; } | |
294 | s->rwstate=SSL_NOTHING; | |
295 | } | |
296 | ||
297 | /* flushed and now remove buffering */ | |
298 | s->wbio=BIO_pop(s->wbio); | |
299 | ||
300 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; | |
301 | BREAK; | |
302 | ||
303 | case SSL2_ST_GET_CLIENT_FINISHED_A: | |
304 | case SSL2_ST_GET_CLIENT_FINISHED_B: | |
305 | ret=get_client_finished(s); | |
306 | if (ret <= 0) | |
307 | goto end; | |
308 | s->init_num=0; | |
309 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A; | |
310 | BREAK; | |
311 | ||
312 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: | |
313 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: | |
314 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: | |
315 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: | |
316 | /* don't do a 'request certificate' if we | |
317 | * don't want to, or we already have one, and | |
318 | * we only want to do it once. */ | |
319 | if (!(s->verify_mode & SSL_VERIFY_PEER) || | |
320 | ((s->session->peer != NULL) && | |
321 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) | |
322 | { | |
323 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; | |
324 | break; | |
325 | } | |
326 | else | |
327 | { | |
328 | ret=request_certificate(s); | |
329 | if (ret <= 0) goto end; | |
330 | s->init_num=0; | |
331 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; | |
332 | } | |
333 | BREAK; | |
334 | ||
335 | case SSL2_ST_SEND_SERVER_FINISHED_A: | |
336 | case SSL2_ST_SEND_SERVER_FINISHED_B: | |
337 | ret=server_finish(s); | |
338 | if (ret <= 0) goto end; | |
339 | s->init_num=0; | |
340 | s->state=SSL_ST_OK; | |
341 | break; | |
342 | ||
343 | case SSL_ST_OK: | |
344 | BUF_MEM_free(s->init_buf); | |
413c4f45 | 345 | ssl_free_wbio_buffer(s); |
d02b48c6 RE |
346 | s->init_buf=NULL; |
347 | s->init_num=0; | |
348 | /* ERR_clear_error();*/ | |
349 | ||
350 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
351 | ||
413c4f45 | 352 | s->ctx->stats.sess_accept_good++; |
d02b48c6 RE |
353 | /* s->server=1; */ |
354 | ret=1; | |
355 | ||
356 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
357 | ||
358 | goto end; | |
58964a49 | 359 | /* BREAK; */ |
d02b48c6 RE |
360 | |
361 | default: | |
362 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE); | |
363 | ret= -1; | |
364 | goto end; | |
58964a49 | 365 | /* BREAK; */ |
d02b48c6 RE |
366 | } |
367 | ||
368 | if ((cb != NULL) && (s->state != state)) | |
369 | { | |
370 | new_state=s->state; | |
371 | s->state=state; | |
372 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
373 | s->state=new_state; | |
374 | } | |
375 | } | |
376 | end: | |
377 | s->in_handshake--; | |
378 | if (cb != NULL) | |
379 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
380 | return(ret); | |
381 | } | |
382 | ||
6b691a5c | 383 | static int get_client_master_key(SSL *s) |
d02b48c6 | 384 | { |
df63a389 | 385 | int is_export,i,n,keya,ek; |
cf82191d | 386 | unsigned long len; |
d02b48c6 RE |
387 | unsigned char *p; |
388 | SSL_CIPHER *cp; | |
e778802f BL |
389 | const EVP_CIPHER *c; |
390 | const EVP_MD *md; | |
d02b48c6 RE |
391 | |
392 | p=(unsigned char *)s->init_buf->data; | |
393 | if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) | |
394 | { | |
395 | i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num); | |
396 | ||
397 | if (i < (10-s->init_num)) | |
398 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); | |
cf82191d BM |
399 | s->init_num = 10; |
400 | ||
d02b48c6 RE |
401 | if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) |
402 | { | |
403 | if (p[-1] != SSL2_MT_ERROR) | |
404 | { | |
405 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
406 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE); | |
407 | } | |
408 | else | |
5574e0ed | 409 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); |
d02b48c6 RE |
410 | return(-1); |
411 | } | |
412 | ||
413 | cp=ssl2_get_cipher_by_char(p); | |
414 | if (cp == NULL) | |
415 | { | |
416 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
5574e0ed | 417 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); |
d02b48c6 RE |
418 | return(-1); |
419 | } | |
420 | s->session->cipher= cp; | |
421 | ||
422 | p+=3; | |
423 | n2s(p,i); s->s2->tmp.clear=i; | |
424 | n2s(p,i); s->s2->tmp.enc=i; | |
425 | n2s(p,i); s->session->key_arg_length=i; | |
c046fffa LJ |
426 | if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH) |
427 | { | |
5574e0ed BM |
428 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
429 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); | |
c046fffa LJ |
430 | return -1; |
431 | } | |
d02b48c6 | 432 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B; |
d02b48c6 RE |
433 | } |
434 | ||
435 | /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ | |
436 | p=(unsigned char *)s->init_buf->data; | |
5574e0ed BM |
437 | if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
438 | { | |
439 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
440 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); | |
441 | return -1; | |
442 | } | |
d02b48c6 | 443 | keya=s->session->key_arg_length; |
cf82191d BM |
444 | len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya; |
445 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
446 | { | |
5574e0ed | 447 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
cf82191d BM |
448 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG); |
449 | return -1; | |
450 | } | |
451 | n = (int)len - s->init_num; | |
452 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
d02b48c6 | 453 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); |
cf82191d BM |
454 | if (s->msg_callback) |
455 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */ | |
456 | p += 10; | |
d02b48c6 RE |
457 | |
458 | memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]), | |
459 | (unsigned int)keya); | |
460 | ||
b56bce4f | 461 | if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) |
d02b48c6 RE |
462 | { |
463 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
464 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY); | |
465 | return(-1); | |
466 | } | |
467 | i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc, | |
468 | &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]), | |
469 | (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); | |
470 | ||
df63a389 | 471 | is_export=SSL_C_IS_EXPORT(s->session->cipher); |
d02b48c6 | 472 | |
413c4f45 | 473 | if (!ssl_cipher_get_evp(s->session,&c,&md,NULL)) |
d02b48c6 RE |
474 | { |
475 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
476 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); | |
477 | return(0); | |
478 | } | |
479 | ||
480 | if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) | |
481 | { | |
df63a389 | 482 | is_export=1; |
d02b48c6 RE |
483 | ek=8; |
484 | } | |
485 | else | |
486 | ek=5; | |
487 | ||
488 | /* bad decrypt */ | |
489 | #if 1 | |
490 | /* If a bad decrypt, continue with protocol but with a | |
31bc51c8 | 491 | * random master secret (Bleichenbacher attack) */ |
d02b48c6 | 492 | if ((i < 0) || |
df63a389 | 493 | ((!is_export && (i != EVP_CIPHER_key_length(c))) |
c23d16ac BM |
494 | || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i != |
495 | (unsigned int)EVP_CIPHER_key_length(c)))))) | |
d02b48c6 | 496 | { |
31bc51c8 | 497 | ERR_clear_error(); |
df63a389 | 498 | if (is_export) |
d02b48c6 RE |
499 | i=ek; |
500 | else | |
501 | i=EVP_CIPHER_key_length(c); | |
e7f97e2d | 502 | RAND_pseudo_bytes(p,i); |
d02b48c6 RE |
503 | } |
504 | #else | |
505 | if (i < 0) | |
506 | { | |
507 | error=1; | |
508 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT); | |
509 | } | |
510 | /* incorrect number of key bytes for non export cipher */ | |
df63a389 UM |
511 | else if ((!is_export && (i != EVP_CIPHER_key_length(c))) |
512 | || (is_export && ((i != ek) || (s->s2->tmp.clear+i != | |
d02b48c6 RE |
513 | EVP_CIPHER_key_length(c))))) |
514 | { | |
515 | error=1; | |
516 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS); | |
517 | } | |
518 | if (error) | |
519 | { | |
520 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
521 | return(-1); | |
522 | } | |
523 | #endif | |
524 | ||
df63a389 | 525 | if (is_export) i+=s->s2->tmp.clear; |
5574e0ed BM |
526 | |
527 | if (i > SSL_MAX_MASTER_KEY_LENGTH) | |
528 | { | |
529 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
530 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); | |
531 | return -1; | |
532 | } | |
d02b48c6 RE |
533 | s->session->master_key_length=i; |
534 | memcpy(s->session->master_key,p,(unsigned int)i); | |
535 | return(1); | |
536 | } | |
537 | ||
6b691a5c | 538 | static int get_client_hello(SSL *s) |
d02b48c6 RE |
539 | { |
540 | int i,n; | |
cf82191d | 541 | unsigned long len; |
d02b48c6 | 542 | unsigned char *p; |
f73e07cf BL |
543 | STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ |
544 | STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ | |
836f9960 | 545 | STACK_OF(SSL_CIPHER) *prio, *allow; |
d02b48c6 RE |
546 | int z; |
547 | ||
548 | /* This is a bit of a hack to check for the correct packet | |
549 | * type the first time round. */ | |
550 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) | |
551 | { | |
552 | s->first_packet=1; | |
553 | s->state=SSL2_ST_GET_CLIENT_HELLO_B; | |
554 | } | |
555 | ||
556 | p=(unsigned char *)s->init_buf->data; | |
557 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) | |
558 | { | |
559 | i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num); | |
560 | if (i < (9-s->init_num)) | |
561 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); | |
cf82191d | 562 | s->init_num = 9; |
d02b48c6 RE |
563 | |
564 | if (*(p++) != SSL2_MT_CLIENT_HELLO) | |
565 | { | |
566 | if (p[-1] != SSL2_MT_ERROR) | |
567 | { | |
568 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
569 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE); | |
570 | } | |
571 | else | |
572 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR); | |
573 | return(-1); | |
574 | } | |
575 | n2s(p,i); | |
576 | if (i < s->version) s->version=i; | |
577 | n2s(p,i); s->s2->tmp.cipher_spec_length=i; | |
578 | n2s(p,i); s->s2->tmp.session_id_length=i; | |
579 | n2s(p,i); s->s2->challenge_length=i; | |
580 | if ( (i < SSL2_MIN_CHALLENGE_LENGTH) || | |
581 | (i > SSL2_MAX_CHALLENGE_LENGTH)) | |
582 | { | |
5574e0ed | 583 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
d02b48c6 RE |
584 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH); |
585 | return(-1); | |
586 | } | |
587 | s->state=SSL2_ST_GET_CLIENT_HELLO_C; | |
d02b48c6 RE |
588 | } |
589 | ||
590 | /* SSL2_ST_GET_CLIENT_HELLO_C */ | |
591 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
592 | len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length; |
593 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
594 | { | |
5574e0ed | 595 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
cf82191d BM |
596 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG); |
597 | return -1; | |
598 | } | |
599 | n = (int)len - s->init_num; | |
600 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
d02b48c6 | 601 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); |
cf82191d BM |
602 | if (s->msg_callback) |
603 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */ | |
604 | p += 9; | |
d02b48c6 RE |
605 | |
606 | /* get session-id before cipher stuff so we can get out session | |
607 | * structure if it is cached */ | |
608 | /* session-id */ | |
609 | if ((s->s2->tmp.session_id_length != 0) && | |
610 | (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) | |
611 | { | |
612 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
613 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH); | |
614 | return(-1); | |
615 | } | |
616 | ||
617 | if (s->s2->tmp.session_id_length == 0) | |
618 | { | |
619 | if (!ssl_get_new_session(s,1)) | |
620 | { | |
621 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
622 | return(-1); | |
623 | } | |
624 | } | |
625 | else | |
626 | { | |
58964a49 RE |
627 | i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]), |
628 | s->s2->tmp.session_id_length); | |
d02b48c6 RE |
629 | if (i == 1) |
630 | { /* previous session */ | |
631 | s->hit=1; | |
632 | } | |
633 | else if (i == -1) | |
634 | { | |
635 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
636 | return(-1); | |
637 | } | |
638 | else | |
639 | { | |
640 | if (s->cert == NULL) | |
641 | { | |
642 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); | |
643 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET); | |
644 | return(-1); | |
645 | } | |
646 | ||
647 | if (!ssl_get_new_session(s,1)) | |
648 | { | |
649 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
650 | return(-1); | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | if (!s->hit) | |
656 | { | |
657 | cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length, | |
658 | &s->session->ciphers); | |
659 | if (cs == NULL) goto mem_err; | |
660 | ||
836f9960 | 661 | cl=SSL_get_ciphers(s); |
d02b48c6 | 662 | |
836f9960 LJ |
663 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
664 | { | |
665 | prio=sk_SSL_CIPHER_dup(cl); | |
666 | if (prio == NULL) goto mem_err; | |
667 | allow = cs; | |
668 | } | |
669 | else | |
670 | { | |
671 | prio = cs; | |
672 | allow = cl; | |
673 | } | |
674 | for (z=0; z<sk_SSL_CIPHER_num(prio); z++) | |
d02b48c6 | 675 | { |
836f9960 | 676 | if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0) |
d02b48c6 | 677 | { |
836f9960 | 678 | sk_SSL_CIPHER_delete(prio,z); |
d02b48c6 RE |
679 | z--; |
680 | } | |
681 | } | |
836f9960 LJ |
682 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
683 | { | |
684 | sk_SSL_CIPHER_free(s->session->ciphers); | |
685 | s->session->ciphers = prio; | |
686 | } | |
d02b48c6 RE |
687 | /* s->session->ciphers should now have a list of |
688 | * ciphers that are on both the client and server. | |
689 | * This list is ordered by the order the client sent | |
836f9960 LJ |
690 | * the ciphers or in the order of the server's preference |
691 | * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. | |
d02b48c6 RE |
692 | */ |
693 | } | |
694 | p+=s->s2->tmp.cipher_spec_length; | |
695 | /* done cipher selection */ | |
696 | ||
697 | /* session id extracted already */ | |
698 | p+=s->s2->tmp.session_id_length; | |
699 | ||
700 | /* challenge */ | |
5574e0ed BM |
701 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
702 | { | |
703 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
704 | SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
705 | return -1; | |
706 | } | |
d02b48c6 RE |
707 | memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length); |
708 | return(1); | |
709 | mem_err: | |
710 | SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE); | |
711 | return(0); | |
712 | } | |
713 | ||
6b691a5c | 714 | static int server_hello(SSL *s) |
d02b48c6 RE |
715 | { |
716 | unsigned char *p,*d; | |
717 | int n,hit; | |
f73e07cf | 718 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
719 | |
720 | p=(unsigned char *)s->init_buf->data; | |
721 | if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) | |
722 | { | |
723 | d=p+11; | |
724 | *(p++)=SSL2_MT_SERVER_HELLO; /* type */ | |
725 | hit=s->hit; | |
726 | *(p++)=(unsigned char)hit; | |
b56bce4f BM |
727 | #if 1 |
728 | if (!hit) | |
729 | { | |
730 | if (s->session->sess_cert != NULL) | |
731 | /* This can't really happen because get_client_hello | |
732 | * has called ssl_get_new_session, which does not set | |
733 | * sess_cert. */ | |
734 | ssl_sess_cert_free(s->session->sess_cert); | |
735 | s->session->sess_cert = ssl_sess_cert_new(); | |
736 | if (s->session->sess_cert == NULL) | |
737 | { | |
738 | SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); | |
739 | return(-1); | |
740 | } | |
741 | } | |
742 | /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL, | |
743 | * depending on whether it survived in the internal cache | |
744 | * or was retrieved from an external cache. | |
745 | * If it is NULL, we cannot put any useful data in it anyway, | |
746 | * so we don't touch it. | |
747 | */ | |
748 | ||
749 | #else /* That's what used to be done when cert_st and sess_cert_st were | |
750 | * the same. */ | |
d02b48c6 RE |
751 | if (!hit) |
752 | { /* else add cert to session */ | |
753 | CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT); | |
9d5cceac BM |
754 | if (s->session->sess_cert != NULL) |
755 | ssl_cert_free(s->session->sess_cert); | |
756 | s->session->sess_cert=s->cert; | |
d02b48c6 RE |
757 | } |
758 | else /* We have a session id-cache hit, if the | |
759 | * session-id has no certificate listed against | |
760 | * the 'cert' structure, grab the 'old' one | |
761 | * listed against the SSL connection */ | |
762 | { | |
9d5cceac | 763 | if (s->session->sess_cert == NULL) |
d02b48c6 RE |
764 | { |
765 | CRYPTO_add(&s->cert->references,1, | |
766 | CRYPTO_LOCK_SSL_CERT); | |
9d5cceac | 767 | s->session->sess_cert=s->cert; |
d02b48c6 RE |
768 | } |
769 | } | |
b56bce4f | 770 | #endif |
d02b48c6 | 771 | |
b56bce4f | 772 | if (s->cert == NULL) |
d02b48c6 RE |
773 | { |
774 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); | |
775 | SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED); | |
776 | return(-1); | |
777 | } | |
778 | ||
779 | if (hit) | |
780 | { | |
781 | *(p++)=0; /* no certificate type */ | |
782 | s2n(s->version,p); /* version */ | |
783 | s2n(0,p); /* cert len */ | |
784 | s2n(0,p); /* ciphers len */ | |
785 | } | |
786 | else | |
787 | { | |
788 | /* EAY EAY */ | |
789 | /* put certificate type */ | |
790 | *(p++)=SSL2_CT_X509_CERTIFICATE; | |
791 | s2n(s->version,p); /* version */ | |
58964a49 | 792 | n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
d02b48c6 | 793 | s2n(n,p); /* certificate length */ |
58964a49 | 794 | i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d); |
d02b48c6 RE |
795 | n=0; |
796 | ||
797 | /* lets send out the ciphers we like in the | |
798 | * prefered order */ | |
799 | sk= s->session->ciphers; | |
800 | n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d); | |
801 | d+=n; | |
802 | s2n(n,p); /* add cipher length */ | |
803 | } | |
804 | ||
805 | /* make and send conn_id */ | |
806 | s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */ | |
807 | s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH; | |
e7f97e2d | 808 | RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length); |
d02b48c6 RE |
809 | memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH); |
810 | d+=SSL2_CONNECTION_ID_LENGTH; | |
811 | ||
812 | s->state=SSL2_ST_SEND_SERVER_HELLO_B; | |
813 | s->init_num=d-(unsigned char *)s->init_buf->data; | |
814 | s->init_off=0; | |
815 | } | |
816 | /* SSL2_ST_SEND_SERVER_HELLO_B */ | |
657e60fa | 817 | /* If we are using TCP/IP, the performance is bad if we do 2 |
d02b48c6 RE |
818 | * writes without a read between them. This occurs when |
819 | * Session-id reuse is used, so I will put in a buffering module | |
820 | */ | |
821 | if (s->hit) | |
822 | { | |
58964a49 | 823 | if (!ssl_init_wbio_buffer(s,1)) return(-1); |
d02b48c6 RE |
824 | } |
825 | ||
826 | return(ssl2_do_write(s)); | |
827 | } | |
828 | ||
6b691a5c | 829 | static int get_client_finished(SSL *s) |
d02b48c6 RE |
830 | { |
831 | unsigned char *p; | |
cf82191d BM |
832 | int i, n; |
833 | unsigned long len; | |
d02b48c6 RE |
834 | |
835 | p=(unsigned char *)s->init_buf->data; | |
836 | if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A) | |
837 | { | |
2b90b1f3 BM |
838 | i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); |
839 | if (i < 1-s->init_num) | |
d02b48c6 | 840 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); |
2b90b1f3 | 841 | s->init_num += i; |
d02b48c6 RE |
842 | |
843 | if (*p != SSL2_MT_CLIENT_FINISHED) | |
844 | { | |
845 | if (*p != SSL2_MT_ERROR) | |
846 | { | |
847 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
848 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); | |
849 | } | |
850 | else | |
2b90b1f3 | 851 | { |
d02b48c6 | 852 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR); |
2b90b1f3 BM |
853 | /* try to read the error message */ |
854 | i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); | |
855 | return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); | |
856 | } | |
d02b48c6 RE |
857 | return(-1); |
858 | } | |
d02b48c6 RE |
859 | s->state=SSL2_ST_GET_CLIENT_FINISHED_B; |
860 | } | |
861 | ||
862 | /* SSL2_ST_GET_CLIENT_FINISHED_B */ | |
5574e0ed BM |
863 | if (s->s2->conn_id_length > sizeof s->s2->conn_id) |
864 | { | |
865 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
866 | SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); | |
867 | return -1; | |
868 | } | |
cf82191d BM |
869 | len = 1 + (unsigned long)s->s2->conn_id_length; |
870 | n = (int)len - s->init_num; | |
871 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
872 | if (i < n) | |
d02b48c6 RE |
873 | { |
874 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); | |
875 | } | |
cf82191d BM |
876 | if (s->msg_callback) |
877 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */ | |
878 | p += 1; | |
54a656ef | 879 | if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0) |
d02b48c6 RE |
880 | { |
881 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
882 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT); | |
883 | return(-1); | |
884 | } | |
885 | return(1); | |
886 | } | |
887 | ||
6b691a5c | 888 | static int server_verify(SSL *s) |
d02b48c6 RE |
889 | { |
890 | unsigned char *p; | |
891 | ||
892 | if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) | |
893 | { | |
894 | p=(unsigned char *)s->init_buf->data; | |
895 | *(p++)=SSL2_MT_SERVER_VERIFY; | |
5574e0ed BM |
896 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
897 | { | |
898 | SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); | |
899 | return -1; | |
900 | } | |
d02b48c6 RE |
901 | memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length); |
902 | /* p+=s->s2->challenge_length; */ | |
903 | ||
904 | s->state=SSL2_ST_SEND_SERVER_VERIFY_B; | |
905 | s->init_num=s->s2->challenge_length+1; | |
906 | s->init_off=0; | |
907 | } | |
908 | return(ssl2_do_write(s)); | |
909 | } | |
910 | ||
6b691a5c | 911 | static int server_finish(SSL *s) |
d02b48c6 RE |
912 | { |
913 | unsigned char *p; | |
914 | ||
915 | if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) | |
916 | { | |
917 | p=(unsigned char *)s->init_buf->data; | |
918 | *(p++)=SSL2_MT_SERVER_FINISHED; | |
919 | ||
5574e0ed BM |
920 | if (s->session->session_id_length > sizeof s->session->session_id) |
921 | { | |
922 | SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); | |
923 | return -1; | |
924 | } | |
925 | memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length); | |
d02b48c6 RE |
926 | /* p+=s->session->session_id_length; */ |
927 | ||
928 | s->state=SSL2_ST_SEND_SERVER_FINISHED_B; | |
929 | s->init_num=s->session->session_id_length+1; | |
930 | s->init_off=0; | |
931 | } | |
932 | ||
933 | /* SSL2_ST_SEND_SERVER_FINISHED_B */ | |
934 | return(ssl2_do_write(s)); | |
935 | } | |
936 | ||
937 | /* send the request and check the response */ | |
6b691a5c | 938 | static int request_certificate(SSL *s) |
d02b48c6 RE |
939 | { |
940 | unsigned char *p,*p2,*buf2; | |
941 | unsigned char *ccd; | |
942 | int i,j,ctype,ret= -1; | |
cf82191d | 943 | unsigned long len; |
d02b48c6 | 944 | X509 *x509=NULL; |
f73e07cf | 945 | STACK_OF(X509) *sk=NULL; |
d02b48c6 RE |
946 | |
947 | ccd=s->s2->tmp.ccl; | |
948 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) | |
949 | { | |
950 | p=(unsigned char *)s->init_buf->data; | |
951 | *(p++)=SSL2_MT_REQUEST_CERTIFICATE; | |
952 | *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION; | |
e7f97e2d | 953 | RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
d02b48c6 RE |
954 | memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
955 | ||
956 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B; | |
957 | s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2; | |
958 | s->init_off=0; | |
959 | } | |
960 | ||
961 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) | |
962 | { | |
963 | i=ssl2_do_write(s); | |
964 | if (i <= 0) | |
965 | { | |
966 | ret=i; | |
967 | goto end; | |
968 | } | |
969 | ||
970 | s->init_num=0; | |
971 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C; | |
972 | } | |
973 | ||
974 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) | |
975 | { | |
976 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
977 | i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */ |
978 | if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3 | |
979 | * (probably NO-CERTIFICATE-ERROR) */ | |
d02b48c6 RE |
980 | { |
981 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); | |
982 | goto end; | |
983 | } | |
cf82191d | 984 | s->init_num += i; |
d02b48c6 | 985 | |
cf82191d | 986 | if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) |
d02b48c6 RE |
987 | { |
988 | n2s(p,i); | |
cf82191d BM |
989 | if (i != SSL2_PE_NO_CERTIFICATE) |
990 | { | |
991 | /* not the error message we expected -- let ssl2_part_read handle it */ | |
992 | s->init_num -= 3; | |
993 | ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3); | |
994 | goto end; | |
995 | } | |
996 | ||
997 | if (s->msg_callback) | |
998 | s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */ | |
999 | ||
1000 | /* this is the one place where we can recover from an SSL 2.0 error */ | |
1001 | ||
d02b48c6 RE |
1002 | if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) |
1003 | { | |
1004 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); | |
1005 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
1006 | goto end; | |
1007 | } | |
1008 | ret=1; | |
1009 | goto end; | |
1010 | } | |
cf82191d | 1011 | if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) |
d02b48c6 RE |
1012 | { |
1013 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
1014 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ); | |
1015 | goto end; | |
1016 | } | |
cf82191d BM |
1017 | if (s->init_num != 6) |
1018 | { | |
1019 | SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1020 | goto end; | |
1021 | } | |
1022 | ||
d02b48c6 RE |
1023 | /* ok we have a response */ |
1024 | /* certificate type, there is only one right now. */ | |
1025 | ctype= *(p++); | |
1026 | if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) | |
1027 | { | |
1028 | ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); | |
1029 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT); | |
1030 | goto end; | |
1031 | } | |
1032 | n2s(p,i); s->s2->tmp.clen=i; | |
1033 | n2s(p,i); s->s2->tmp.rlen=i; | |
1034 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D; | |
d02b48c6 RE |
1035 | } |
1036 | ||
1037 | /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ | |
1038 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
1039 | len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; |
1040 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
1041 | { | |
52c29b7b | 1042 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG); |
cf82191d BM |
1043 | goto end; |
1044 | } | |
1045 | j = (int)len - s->init_num; | |
1046 | i = ssl2_read(s,(char *)&(p[s->init_num]),j); | |
d02b48c6 RE |
1047 | if (i < j) |
1048 | { | |
1049 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); | |
1050 | goto end; | |
1051 | } | |
cf82191d BM |
1052 | if (s->msg_callback) |
1053 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */ | |
1054 | p += 6; | |
d02b48c6 RE |
1055 | |
1056 | x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen); | |
1057 | if (x509 == NULL) | |
1058 | { | |
1059 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB); | |
1060 | goto msg_end; | |
1061 | } | |
1062 | ||
f73e07cf | 1063 | if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509))) |
d02b48c6 RE |
1064 | { |
1065 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1066 | goto msg_end; | |
1067 | } | |
1068 | ||
1069 | i=ssl_verify_cert_chain(s,sk); | |
1070 | ||
1071 | if (i) /* we like the packet, now check the chksum */ | |
1072 | { | |
1073 | EVP_MD_CTX ctx; | |
1074 | EVP_PKEY *pkey=NULL; | |
1075 | ||
dbad1690 | 1076 | EVP_MD_CTX_init(&ctx); |
20d2186c | 1077 | EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL); |
d02b48c6 | 1078 | EVP_VerifyUpdate(&ctx,s->s2->key_material, |
54a656ef | 1079 | s->s2->key_material_length); |
d02b48c6 RE |
1080 | EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
1081 | ||
b56bce4f | 1082 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
26a3a48d | 1083 | buf2=OPENSSL_malloc((unsigned int)i); |
d02b48c6 RE |
1084 | if (buf2 == NULL) |
1085 | { | |
1086 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1087 | goto msg_end; | |
1088 | } | |
1089 | p2=buf2; | |
b56bce4f | 1090 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2); |
d02b48c6 | 1091 | EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i); |
26a3a48d | 1092 | OPENSSL_free(buf2); |
d02b48c6 RE |
1093 | |
1094 | pkey=X509_get_pubkey(x509); | |
1095 | if (pkey == NULL) goto end; | |
1096 | i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey); | |
a8236c8c | 1097 | EVP_PKEY_free(pkey); |
dbad1690 | 1098 | EVP_MD_CTX_cleanup(&ctx); |
d02b48c6 RE |
1099 | |
1100 | if (i) | |
1101 | { | |
1102 | if (s->session->peer != NULL) | |
1103 | X509_free(s->session->peer); | |
1104 | s->session->peer=x509; | |
1105 | CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509); | |
b1fe6ca1 | 1106 | s->session->verify_result = s->verify_result; |
d02b48c6 RE |
1107 | ret=1; |
1108 | goto end; | |
1109 | } | |
1110 | else | |
1111 | { | |
1112 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM); | |
1113 | goto msg_end; | |
1114 | } | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | msg_end: | |
1119 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); | |
1120 | } | |
1121 | end: | |
f73e07cf | 1122 | sk_X509_free(sk); |
a8236c8c | 1123 | X509_free(x509); |
d02b48c6 RE |
1124 | return(ret); |
1125 | } | |
1126 | ||
6b691a5c UM |
1127 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, |
1128 | unsigned char *to, int padding) | |
d02b48c6 RE |
1129 | { |
1130 | RSA *rsa; | |
1131 | int i; | |
1132 | ||
58964a49 | 1133 | if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) |
d02b48c6 RE |
1134 | { |
1135 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY); | |
1136 | return(-1); | |
1137 | } | |
58964a49 | 1138 | if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) |
d02b48c6 RE |
1139 | { |
1140 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); | |
1141 | return(-1); | |
1142 | } | |
58964a49 | 1143 | rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; |
d02b48c6 RE |
1144 | |
1145 | /* we have the public key */ | |
1146 | i=RSA_private_decrypt(len,from,to,rsa,padding); | |
1147 | if (i < 0) | |
1148 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB); | |
1149 | return(i); | |
1150 | } | |
bc36ee62 | 1151 | #else /* !OPENSSL_NO_SSL2 */ |
752d706a BL |
1152 | |
1153 | # if PEDANTIC | |
1154 | static void *dummy=&dummy; | |
1155 | # endif | |
1156 | ||
79df9d62 | 1157 | #endif |