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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> |
d02b48c6 | 119 | |
4ebb342f | 120 | static const SSL_METHOD *ssl2_get_server_method(int ver); |
d02b48c6 RE |
121 | static int get_client_master_key(SSL *s); |
122 | static int get_client_hello(SSL *s); | |
123 | static int server_hello(SSL *s); | |
124 | static int get_client_finished(SSL *s); | |
125 | static int server_verify(SSL *s); | |
126 | static int server_finish(SSL *s); | |
127 | static int request_certificate(SSL *s); | |
128 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, | |
129 | unsigned char *to,int padding); | |
d02b48c6 RE |
130 | #define BREAK break |
131 | ||
4ebb342f | 132 | static const SSL_METHOD *ssl2_get_server_method(int ver) |
d02b48c6 | 133 | { |
58964a49 | 134 | if (ver == SSL2_VERSION) |
d02b48c6 RE |
135 | return(SSLv2_server_method()); |
136 | else | |
137 | return(NULL); | |
138 | } | |
139 | ||
f3b656b2 DSH |
140 | IMPLEMENT_ssl2_meth_func(SSLv2_server_method, |
141 | ssl2_accept, | |
142 | ssl_undefined_function, | |
143 | ssl2_get_server_method) | |
d02b48c6 | 144 | |
6b691a5c | 145 | int ssl2_accept(SSL *s) |
d02b48c6 | 146 | { |
7bbcb2f6 | 147 | unsigned long l=(unsigned long)time(NULL); |
d02b48c6 RE |
148 | BUF_MEM *buf=NULL; |
149 | int ret= -1; | |
150 | long num1; | |
45d87a1f | 151 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
152 | int new_state,state; |
153 | ||
eb952088 | 154 | RAND_add(&l,sizeof(l),0); |
d02b48c6 | 155 | ERR_clear_error(); |
58964a49 | 156 | clear_sys_error(); |
d02b48c6 RE |
157 | |
158 | if (s->info_callback != NULL) | |
159 | cb=s->info_callback; | |
160 | else if (s->ctx->info_callback != NULL) | |
161 | cb=s->ctx->info_callback; | |
162 | ||
163 | /* init things to blank */ | |
d02b48c6 | 164 | s->in_handshake++; |
979689aa | 165 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 166 | |
b56bce4f | 167 | if (s->cert == NULL) |
d02b48c6 RE |
168 | { |
169 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
170 | return(-1); | |
171 | } | |
172 | ||
58964a49 | 173 | clear_sys_error(); |
d02b48c6 RE |
174 | for (;;) |
175 | { | |
176 | state=s->state; | |
177 | ||
178 | switch (s->state) | |
179 | { | |
180 | case SSL_ST_BEFORE: | |
181 | case SSL_ST_ACCEPT: | |
182 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
183 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
184 | ||
413c4f45 | 185 | s->server=1; |
d02b48c6 RE |
186 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
187 | ||
58964a49 | 188 | s->version=SSL2_VERSION; |
d02b48c6 RE |
189 | s->type=SSL_ST_ACCEPT; |
190 | ||
191 | buf=s->init_buf; | |
192 | if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) | |
193 | { ret= -1; goto end; } | |
194 | if (!BUF_MEM_grow(buf,(int) | |
195 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) | |
196 | { ret= -1; goto end; } | |
197 | s->init_buf=buf; | |
198 | s->init_num=0; | |
413c4f45 | 199 | s->ctx->stats.sess_accept++; |
d02b48c6 RE |
200 | s->handshake_func=ssl2_accept; |
201 | s->state=SSL2_ST_GET_CLIENT_HELLO_A; | |
202 | BREAK; | |
203 | ||
204 | case SSL2_ST_GET_CLIENT_HELLO_A: | |
205 | case SSL2_ST_GET_CLIENT_HELLO_B: | |
206 | case SSL2_ST_GET_CLIENT_HELLO_C: | |
207 | s->shutdown=0; | |
208 | ret=get_client_hello(s); | |
209 | if (ret <= 0) goto end; | |
210 | s->init_num=0; | |
211 | s->state=SSL2_ST_SEND_SERVER_HELLO_A; | |
212 | BREAK; | |
213 | ||
214 | case SSL2_ST_SEND_SERVER_HELLO_A: | |
215 | case SSL2_ST_SEND_SERVER_HELLO_B: | |
216 | ret=server_hello(s); | |
217 | if (ret <= 0) goto end; | |
218 | s->init_num=0; | |
219 | if (!s->hit) | |
220 | { | |
221 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A; | |
222 | BREAK; | |
223 | } | |
224 | else | |
225 | { | |
226 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; | |
227 | BREAK; | |
228 | } | |
229 | case SSL2_ST_GET_CLIENT_MASTER_KEY_A: | |
230 | case SSL2_ST_GET_CLIENT_MASTER_KEY_B: | |
231 | ret=get_client_master_key(s); | |
232 | if (ret <= 0) goto end; | |
233 | s->init_num=0; | |
234 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; | |
235 | BREAK; | |
236 | ||
237 | case SSL2_ST_SERVER_START_ENCRYPTION: | |
238 | /* Ok we how have sent all the stuff needed to | |
239 | * start encrypting, the next packet back will | |
240 | * be encrypted. */ | |
241 | if (!ssl2_enc_init(s,0)) | |
242 | { ret= -1; goto end; } | |
243 | s->s2->clear_text=0; | |
244 | s->state=SSL2_ST_SEND_SERVER_VERIFY_A; | |
245 | BREAK; | |
246 | ||
247 | case SSL2_ST_SEND_SERVER_VERIFY_A: | |
248 | case SSL2_ST_SEND_SERVER_VERIFY_B: | |
249 | ret=server_verify(s); | |
250 | if (ret <= 0) goto end; | |
251 | s->init_num=0; | |
252 | if (s->hit) | |
253 | { | |
254 | /* If we are in here, we have been | |
255 | * buffering the output, so we need to | |
256 | * flush it and remove buffering from | |
257 | * future traffic */ | |
258 | s->state=SSL2_ST_SEND_SERVER_VERIFY_C; | |
259 | BREAK; | |
260 | } | |
261 | else | |
262 | { | |
263 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; | |
264 | break; | |
265 | } | |
266 | ||
267 | case SSL2_ST_SEND_SERVER_VERIFY_C: | |
268 | /* get the number of bytes to write */ | |
269 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
270 | if (num1 != 0) | |
271 | { | |
272 | s->rwstate=SSL_WRITING; | |
273 | num1=BIO_flush(s->wbio); | |
274 | if (num1 <= 0) { ret= -1; goto end; } | |
275 | s->rwstate=SSL_NOTHING; | |
276 | } | |
277 | ||
278 | /* flushed and now remove buffering */ | |
279 | s->wbio=BIO_pop(s->wbio); | |
280 | ||
281 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; | |
282 | BREAK; | |
283 | ||
284 | case SSL2_ST_GET_CLIENT_FINISHED_A: | |
285 | case SSL2_ST_GET_CLIENT_FINISHED_B: | |
286 | ret=get_client_finished(s); | |
287 | if (ret <= 0) | |
288 | goto end; | |
289 | s->init_num=0; | |
290 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A; | |
291 | BREAK; | |
292 | ||
293 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: | |
294 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: | |
295 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: | |
296 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: | |
297 | /* don't do a 'request certificate' if we | |
298 | * don't want to, or we already have one, and | |
299 | * we only want to do it once. */ | |
300 | if (!(s->verify_mode & SSL_VERIFY_PEER) || | |
301 | ((s->session->peer != NULL) && | |
302 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) | |
303 | { | |
304 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; | |
305 | break; | |
306 | } | |
307 | else | |
308 | { | |
309 | ret=request_certificate(s); | |
310 | if (ret <= 0) goto end; | |
311 | s->init_num=0; | |
312 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; | |
313 | } | |
314 | BREAK; | |
315 | ||
316 | case SSL2_ST_SEND_SERVER_FINISHED_A: | |
317 | case SSL2_ST_SEND_SERVER_FINISHED_B: | |
318 | ret=server_finish(s); | |
319 | if (ret <= 0) goto end; | |
320 | s->init_num=0; | |
321 | s->state=SSL_ST_OK; | |
322 | break; | |
323 | ||
324 | case SSL_ST_OK: | |
325 | BUF_MEM_free(s->init_buf); | |
413c4f45 | 326 | ssl_free_wbio_buffer(s); |
d02b48c6 RE |
327 | s->init_buf=NULL; |
328 | s->init_num=0; | |
329 | /* ERR_clear_error();*/ | |
330 | ||
331 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
332 | ||
413c4f45 | 333 | s->ctx->stats.sess_accept_good++; |
d02b48c6 RE |
334 | /* s->server=1; */ |
335 | ret=1; | |
336 | ||
337 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
338 | ||
339 | goto end; | |
58964a49 | 340 | /* BREAK; */ |
d02b48c6 RE |
341 | |
342 | default: | |
343 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE); | |
344 | ret= -1; | |
345 | goto end; | |
58964a49 | 346 | /* BREAK; */ |
d02b48c6 RE |
347 | } |
348 | ||
349 | if ((cb != NULL) && (s->state != state)) | |
350 | { | |
351 | new_state=s->state; | |
352 | s->state=state; | |
353 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
354 | s->state=new_state; | |
355 | } | |
356 | } | |
357 | end: | |
358 | s->in_handshake--; | |
359 | if (cb != NULL) | |
360 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
361 | return(ret); | |
362 | } | |
363 | ||
6b691a5c | 364 | static int get_client_master_key(SSL *s) |
d02b48c6 | 365 | { |
df63a389 | 366 | int is_export,i,n,keya,ek; |
cf82191d | 367 | unsigned long len; |
d02b48c6 | 368 | unsigned char *p; |
babb3798 | 369 | const SSL_CIPHER *cp; |
e778802f BL |
370 | const EVP_CIPHER *c; |
371 | const EVP_MD *md; | |
d02b48c6 RE |
372 | |
373 | p=(unsigned char *)s->init_buf->data; | |
374 | if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) | |
375 | { | |
376 | i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num); | |
377 | ||
378 | if (i < (10-s->init_num)) | |
379 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); | |
cf82191d BM |
380 | s->init_num = 10; |
381 | ||
d02b48c6 RE |
382 | if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) |
383 | { | |
384 | if (p[-1] != SSL2_MT_ERROR) | |
385 | { | |
386 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
387 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE); | |
388 | } | |
389 | else | |
5574e0ed | 390 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); |
d02b48c6 RE |
391 | return(-1); |
392 | } | |
393 | ||
394 | cp=ssl2_get_cipher_by_char(p); | |
395 | if (cp == NULL) | |
396 | { | |
397 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
5574e0ed | 398 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); |
d02b48c6 RE |
399 | return(-1); |
400 | } | |
401 | s->session->cipher= cp; | |
402 | ||
403 | p+=3; | |
404 | n2s(p,i); s->s2->tmp.clear=i; | |
405 | n2s(p,i); s->s2->tmp.enc=i; | |
406 | n2s(p,i); s->session->key_arg_length=i; | |
c046fffa LJ |
407 | if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH) |
408 | { | |
5574e0ed BM |
409 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
410 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); | |
c046fffa LJ |
411 | return -1; |
412 | } | |
d02b48c6 | 413 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B; |
d02b48c6 RE |
414 | } |
415 | ||
416 | /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ | |
417 | p=(unsigned char *)s->init_buf->data; | |
5574e0ed BM |
418 | if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
419 | { | |
420 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
421 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); | |
422 | return -1; | |
423 | } | |
d02b48c6 | 424 | keya=s->session->key_arg_length; |
cf82191d BM |
425 | len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya; |
426 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
427 | { | |
5574e0ed | 428 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
cf82191d BM |
429 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG); |
430 | return -1; | |
431 | } | |
432 | n = (int)len - s->init_num; | |
433 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
d02b48c6 | 434 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); |
cf82191d BM |
435 | if (s->msg_callback) |
436 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */ | |
437 | p += 10; | |
d02b48c6 RE |
438 | |
439 | memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]), | |
440 | (unsigned int)keya); | |
441 | ||
b56bce4f | 442 | if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) |
d02b48c6 RE |
443 | { |
444 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
445 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY); | |
446 | return(-1); | |
447 | } | |
448 | i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc, | |
449 | &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]), | |
450 | (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); | |
451 | ||
df63a389 | 452 | is_export=SSL_C_IS_EXPORT(s->session->cipher); |
d02b48c6 | 453 | |
b948e2c5 | 454 | if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL)) |
d02b48c6 RE |
455 | { |
456 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
457 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); | |
458 | return(0); | |
459 | } | |
460 | ||
461 | if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) | |
462 | { | |
df63a389 | 463 | is_export=1; |
d02b48c6 RE |
464 | ek=8; |
465 | } | |
466 | else | |
467 | ek=5; | |
468 | ||
469 | /* bad decrypt */ | |
470 | #if 1 | |
471 | /* If a bad decrypt, continue with protocol but with a | |
31bc51c8 | 472 | * random master secret (Bleichenbacher attack) */ |
d02b48c6 | 473 | if ((i < 0) || |
df63a389 | 474 | ((!is_export && (i != EVP_CIPHER_key_length(c))) |
c23d16ac BM |
475 | || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i != |
476 | (unsigned int)EVP_CIPHER_key_length(c)))))) | |
d02b48c6 | 477 | { |
31bc51c8 | 478 | ERR_clear_error(); |
df63a389 | 479 | if (is_export) |
d02b48c6 RE |
480 | i=ek; |
481 | else | |
482 | i=EVP_CIPHER_key_length(c); | |
7c7667b8 NL |
483 | if (RAND_pseudo_bytes(p,i) <= 0) |
484 | return 0; | |
d02b48c6 RE |
485 | } |
486 | #else | |
487 | if (i < 0) | |
488 | { | |
489 | error=1; | |
490 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT); | |
491 | } | |
492 | /* incorrect number of key bytes for non export cipher */ | |
df63a389 UM |
493 | else if ((!is_export && (i != EVP_CIPHER_key_length(c))) |
494 | || (is_export && ((i != ek) || (s->s2->tmp.clear+i != | |
d02b48c6 RE |
495 | EVP_CIPHER_key_length(c))))) |
496 | { | |
497 | error=1; | |
498 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS); | |
499 | } | |
500 | if (error) | |
501 | { | |
502 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
503 | return(-1); | |
504 | } | |
505 | #endif | |
506 | ||
df63a389 | 507 | if (is_export) i+=s->s2->tmp.clear; |
5574e0ed BM |
508 | |
509 | if (i > SSL_MAX_MASTER_KEY_LENGTH) | |
510 | { | |
511 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
512 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); | |
513 | return -1; | |
514 | } | |
d02b48c6 RE |
515 | s->session->master_key_length=i; |
516 | memcpy(s->session->master_key,p,(unsigned int)i); | |
517 | return(1); | |
518 | } | |
519 | ||
6b691a5c | 520 | static int get_client_hello(SSL *s) |
d02b48c6 RE |
521 | { |
522 | int i,n; | |
cf82191d | 523 | unsigned long len; |
d02b48c6 | 524 | unsigned char *p; |
f73e07cf BL |
525 | STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ |
526 | STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ | |
836f9960 | 527 | STACK_OF(SSL_CIPHER) *prio, *allow; |
d02b48c6 RE |
528 | int z; |
529 | ||
530 | /* This is a bit of a hack to check for the correct packet | |
531 | * type the first time round. */ | |
532 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) | |
533 | { | |
534 | s->first_packet=1; | |
535 | s->state=SSL2_ST_GET_CLIENT_HELLO_B; | |
536 | } | |
537 | ||
538 | p=(unsigned char *)s->init_buf->data; | |
539 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) | |
540 | { | |
541 | i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num); | |
542 | if (i < (9-s->init_num)) | |
543 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); | |
cf82191d | 544 | s->init_num = 9; |
d02b48c6 RE |
545 | |
546 | if (*(p++) != SSL2_MT_CLIENT_HELLO) | |
547 | { | |
548 | if (p[-1] != SSL2_MT_ERROR) | |
549 | { | |
550 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
551 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE); | |
552 | } | |
553 | else | |
554 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR); | |
555 | return(-1); | |
556 | } | |
557 | n2s(p,i); | |
558 | if (i < s->version) s->version=i; | |
559 | n2s(p,i); s->s2->tmp.cipher_spec_length=i; | |
560 | n2s(p,i); s->s2->tmp.session_id_length=i; | |
561 | n2s(p,i); s->s2->challenge_length=i; | |
562 | if ( (i < SSL2_MIN_CHALLENGE_LENGTH) || | |
563 | (i > SSL2_MAX_CHALLENGE_LENGTH)) | |
564 | { | |
5574e0ed | 565 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
d02b48c6 RE |
566 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH); |
567 | return(-1); | |
568 | } | |
569 | s->state=SSL2_ST_GET_CLIENT_HELLO_C; | |
d02b48c6 RE |
570 | } |
571 | ||
572 | /* SSL2_ST_GET_CLIENT_HELLO_C */ | |
573 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
574 | len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length; |
575 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
576 | { | |
5574e0ed | 577 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
cf82191d BM |
578 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG); |
579 | return -1; | |
580 | } | |
581 | n = (int)len - s->init_num; | |
582 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
d02b48c6 | 583 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); |
cf82191d BM |
584 | if (s->msg_callback) |
585 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */ | |
586 | p += 9; | |
d02b48c6 RE |
587 | |
588 | /* get session-id before cipher stuff so we can get out session | |
589 | * structure if it is cached */ | |
590 | /* session-id */ | |
591 | if ((s->s2->tmp.session_id_length != 0) && | |
592 | (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) | |
593 | { | |
594 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
595 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH); | |
596 | return(-1); | |
597 | } | |
598 | ||
599 | if (s->s2->tmp.session_id_length == 0) | |
600 | { | |
601 | if (!ssl_get_new_session(s,1)) | |
602 | { | |
603 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
604 | return(-1); | |
605 | } | |
606 | } | |
607 | else | |
608 | { | |
58964a49 | 609 | i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]), |
6434abbf | 610 | s->s2->tmp.session_id_length, NULL); |
d02b48c6 RE |
611 | if (i == 1) |
612 | { /* previous session */ | |
613 | s->hit=1; | |
614 | } | |
615 | else if (i == -1) | |
616 | { | |
617 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
618 | return(-1); | |
619 | } | |
620 | else | |
621 | { | |
622 | if (s->cert == NULL) | |
623 | { | |
624 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); | |
625 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET); | |
626 | return(-1); | |
627 | } | |
628 | ||
629 | if (!ssl_get_new_session(s,1)) | |
630 | { | |
631 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
632 | return(-1); | |
633 | } | |
634 | } | |
635 | } | |
636 | ||
637 | if (!s->hit) | |
638 | { | |
639 | cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length, | |
640 | &s->session->ciphers); | |
641 | if (cs == NULL) goto mem_err; | |
642 | ||
836f9960 | 643 | cl=SSL_get_ciphers(s); |
d02b48c6 | 644 | |
836f9960 LJ |
645 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
646 | { | |
647 | prio=sk_SSL_CIPHER_dup(cl); | |
648 | if (prio == NULL) goto mem_err; | |
649 | allow = cs; | |
650 | } | |
651 | else | |
652 | { | |
653 | prio = cs; | |
654 | allow = cl; | |
655 | } | |
656 | for (z=0; z<sk_SSL_CIPHER_num(prio); z++) | |
d02b48c6 | 657 | { |
836f9960 | 658 | if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0) |
d02b48c6 | 659 | { |
a6fbcb42 | 660 | (void)sk_SSL_CIPHER_delete(prio,z); |
d02b48c6 RE |
661 | z--; |
662 | } | |
663 | } | |
836f9960 LJ |
664 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
665 | { | |
666 | sk_SSL_CIPHER_free(s->session->ciphers); | |
667 | s->session->ciphers = prio; | |
668 | } | |
d02b48c6 RE |
669 | /* s->session->ciphers should now have a list of |
670 | * ciphers that are on both the client and server. | |
671 | * This list is ordered by the order the client sent | |
836f9960 LJ |
672 | * the ciphers or in the order of the server's preference |
673 | * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. | |
d02b48c6 RE |
674 | */ |
675 | } | |
676 | p+=s->s2->tmp.cipher_spec_length; | |
677 | /* done cipher selection */ | |
678 | ||
679 | /* session id extracted already */ | |
680 | p+=s->s2->tmp.session_id_length; | |
681 | ||
682 | /* challenge */ | |
5574e0ed BM |
683 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
684 | { | |
685 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
686 | SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
687 | return -1; | |
688 | } | |
d02b48c6 RE |
689 | memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length); |
690 | return(1); | |
691 | mem_err: | |
692 | SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE); | |
693 | return(0); | |
694 | } | |
695 | ||
6b691a5c | 696 | static int server_hello(SSL *s) |
d02b48c6 RE |
697 | { |
698 | unsigned char *p,*d; | |
699 | int n,hit; | |
f73e07cf | 700 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
701 | |
702 | p=(unsigned char *)s->init_buf->data; | |
703 | if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) | |
704 | { | |
705 | d=p+11; | |
706 | *(p++)=SSL2_MT_SERVER_HELLO; /* type */ | |
707 | hit=s->hit; | |
708 | *(p++)=(unsigned char)hit; | |
b56bce4f BM |
709 | #if 1 |
710 | if (!hit) | |
711 | { | |
712 | if (s->session->sess_cert != NULL) | |
713 | /* This can't really happen because get_client_hello | |
714 | * has called ssl_get_new_session, which does not set | |
715 | * sess_cert. */ | |
716 | ssl_sess_cert_free(s->session->sess_cert); | |
717 | s->session->sess_cert = ssl_sess_cert_new(); | |
718 | if (s->session->sess_cert == NULL) | |
719 | { | |
720 | SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); | |
721 | return(-1); | |
722 | } | |
723 | } | |
724 | /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL, | |
725 | * depending on whether it survived in the internal cache | |
726 | * or was retrieved from an external cache. | |
727 | * If it is NULL, we cannot put any useful data in it anyway, | |
728 | * so we don't touch it. | |
729 | */ | |
730 | ||
731 | #else /* That's what used to be done when cert_st and sess_cert_st were | |
732 | * the same. */ | |
d02b48c6 RE |
733 | if (!hit) |
734 | { /* else add cert to session */ | |
735 | CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT); | |
9d5cceac BM |
736 | if (s->session->sess_cert != NULL) |
737 | ssl_cert_free(s->session->sess_cert); | |
738 | s->session->sess_cert=s->cert; | |
d02b48c6 RE |
739 | } |
740 | else /* We have a session id-cache hit, if the | |
741 | * session-id has no certificate listed against | |
742 | * the 'cert' structure, grab the 'old' one | |
743 | * listed against the SSL connection */ | |
744 | { | |
9d5cceac | 745 | if (s->session->sess_cert == NULL) |
d02b48c6 RE |
746 | { |
747 | CRYPTO_add(&s->cert->references,1, | |
748 | CRYPTO_LOCK_SSL_CERT); | |
9d5cceac | 749 | s->session->sess_cert=s->cert; |
d02b48c6 RE |
750 | } |
751 | } | |
b56bce4f | 752 | #endif |
d02b48c6 | 753 | |
b56bce4f | 754 | if (s->cert == NULL) |
d02b48c6 RE |
755 | { |
756 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); | |
757 | SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED); | |
758 | return(-1); | |
759 | } | |
760 | ||
761 | if (hit) | |
762 | { | |
763 | *(p++)=0; /* no certificate type */ | |
764 | s2n(s->version,p); /* version */ | |
765 | s2n(0,p); /* cert len */ | |
766 | s2n(0,p); /* ciphers len */ | |
767 | } | |
768 | else | |
769 | { | |
770 | /* EAY EAY */ | |
771 | /* put certificate type */ | |
772 | *(p++)=SSL2_CT_X509_CERTIFICATE; | |
773 | s2n(s->version,p); /* version */ | |
58964a49 | 774 | n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
d02b48c6 | 775 | s2n(n,p); /* certificate length */ |
58964a49 | 776 | i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d); |
d02b48c6 RE |
777 | n=0; |
778 | ||
779 | /* lets send out the ciphers we like in the | |
780 | * prefered order */ | |
781 | sk= s->session->ciphers; | |
c6c2e313 | 782 | n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0); |
d02b48c6 RE |
783 | d+=n; |
784 | s2n(n,p); /* add cipher length */ | |
785 | } | |
786 | ||
787 | /* make and send conn_id */ | |
788 | s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */ | |
789 | s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH; | |
7c7667b8 NL |
790 | if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0) |
791 | return -1; | |
d02b48c6 RE |
792 | memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH); |
793 | d+=SSL2_CONNECTION_ID_LENGTH; | |
794 | ||
795 | s->state=SSL2_ST_SEND_SERVER_HELLO_B; | |
796 | s->init_num=d-(unsigned char *)s->init_buf->data; | |
797 | s->init_off=0; | |
798 | } | |
799 | /* SSL2_ST_SEND_SERVER_HELLO_B */ | |
657e60fa | 800 | /* If we are using TCP/IP, the performance is bad if we do 2 |
d02b48c6 RE |
801 | * writes without a read between them. This occurs when |
802 | * Session-id reuse is used, so I will put in a buffering module | |
803 | */ | |
804 | if (s->hit) | |
805 | { | |
58964a49 | 806 | if (!ssl_init_wbio_buffer(s,1)) return(-1); |
d02b48c6 RE |
807 | } |
808 | ||
809 | return(ssl2_do_write(s)); | |
810 | } | |
811 | ||
6b691a5c | 812 | static int get_client_finished(SSL *s) |
d02b48c6 RE |
813 | { |
814 | unsigned char *p; | |
cf82191d BM |
815 | int i, n; |
816 | unsigned long len; | |
d02b48c6 RE |
817 | |
818 | p=(unsigned char *)s->init_buf->data; | |
819 | if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A) | |
820 | { | |
2b90b1f3 BM |
821 | i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); |
822 | if (i < 1-s->init_num) | |
d02b48c6 | 823 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); |
2b90b1f3 | 824 | s->init_num += i; |
d02b48c6 RE |
825 | |
826 | if (*p != SSL2_MT_CLIENT_FINISHED) | |
827 | { | |
828 | if (*p != SSL2_MT_ERROR) | |
829 | { | |
830 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
831 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); | |
832 | } | |
833 | else | |
2b90b1f3 | 834 | { |
d02b48c6 | 835 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR); |
2b90b1f3 BM |
836 | /* try to read the error message */ |
837 | i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); | |
838 | return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); | |
839 | } | |
d02b48c6 RE |
840 | return(-1); |
841 | } | |
d02b48c6 RE |
842 | s->state=SSL2_ST_GET_CLIENT_FINISHED_B; |
843 | } | |
844 | ||
845 | /* SSL2_ST_GET_CLIENT_FINISHED_B */ | |
5574e0ed BM |
846 | if (s->s2->conn_id_length > sizeof s->s2->conn_id) |
847 | { | |
848 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
849 | SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); | |
850 | return -1; | |
851 | } | |
cf82191d BM |
852 | len = 1 + (unsigned long)s->s2->conn_id_length; |
853 | n = (int)len - s->init_num; | |
854 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); | |
855 | if (i < n) | |
d02b48c6 RE |
856 | { |
857 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); | |
858 | } | |
cf82191d BM |
859 | if (s->msg_callback) |
860 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */ | |
861 | p += 1; | |
54a656ef | 862 | if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0) |
d02b48c6 RE |
863 | { |
864 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
865 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT); | |
866 | return(-1); | |
867 | } | |
868 | return(1); | |
869 | } | |
870 | ||
6b691a5c | 871 | static int server_verify(SSL *s) |
d02b48c6 RE |
872 | { |
873 | unsigned char *p; | |
874 | ||
875 | if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) | |
876 | { | |
877 | p=(unsigned char *)s->init_buf->data; | |
878 | *(p++)=SSL2_MT_SERVER_VERIFY; | |
5574e0ed BM |
879 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
880 | { | |
881 | SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); | |
882 | return -1; | |
883 | } | |
d02b48c6 RE |
884 | memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length); |
885 | /* p+=s->s2->challenge_length; */ | |
886 | ||
887 | s->state=SSL2_ST_SEND_SERVER_VERIFY_B; | |
888 | s->init_num=s->s2->challenge_length+1; | |
889 | s->init_off=0; | |
890 | } | |
891 | return(ssl2_do_write(s)); | |
892 | } | |
893 | ||
6b691a5c | 894 | static int server_finish(SSL *s) |
d02b48c6 RE |
895 | { |
896 | unsigned char *p; | |
897 | ||
898 | if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) | |
899 | { | |
900 | p=(unsigned char *)s->init_buf->data; | |
901 | *(p++)=SSL2_MT_SERVER_FINISHED; | |
902 | ||
5574e0ed BM |
903 | if (s->session->session_id_length > sizeof s->session->session_id) |
904 | { | |
905 | SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); | |
906 | return -1; | |
907 | } | |
908 | memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length); | |
d02b48c6 RE |
909 | /* p+=s->session->session_id_length; */ |
910 | ||
911 | s->state=SSL2_ST_SEND_SERVER_FINISHED_B; | |
912 | s->init_num=s->session->session_id_length+1; | |
913 | s->init_off=0; | |
914 | } | |
915 | ||
916 | /* SSL2_ST_SEND_SERVER_FINISHED_B */ | |
917 | return(ssl2_do_write(s)); | |
918 | } | |
919 | ||
920 | /* send the request and check the response */ | |
6b691a5c | 921 | static int request_certificate(SSL *s) |
d02b48c6 | 922 | { |
875a644a | 923 | const unsigned char *cp; |
d02b48c6 RE |
924 | unsigned char *p,*p2,*buf2; |
925 | unsigned char *ccd; | |
926 | int i,j,ctype,ret= -1; | |
cf82191d | 927 | unsigned long len; |
d02b48c6 | 928 | X509 *x509=NULL; |
f73e07cf | 929 | STACK_OF(X509) *sk=NULL; |
d02b48c6 RE |
930 | |
931 | ccd=s->s2->tmp.ccl; | |
932 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) | |
933 | { | |
934 | p=(unsigned char *)s->init_buf->data; | |
935 | *(p++)=SSL2_MT_REQUEST_CERTIFICATE; | |
936 | *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION; | |
7c7667b8 NL |
937 | if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0) |
938 | return -1; | |
d02b48c6 RE |
939 | memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
940 | ||
941 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B; | |
942 | s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2; | |
943 | s->init_off=0; | |
944 | } | |
945 | ||
946 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) | |
947 | { | |
948 | i=ssl2_do_write(s); | |
949 | if (i <= 0) | |
950 | { | |
951 | ret=i; | |
952 | goto end; | |
953 | } | |
954 | ||
955 | s->init_num=0; | |
956 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C; | |
957 | } | |
958 | ||
959 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) | |
960 | { | |
961 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
962 | i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */ |
963 | if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3 | |
964 | * (probably NO-CERTIFICATE-ERROR) */ | |
d02b48c6 RE |
965 | { |
966 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); | |
967 | goto end; | |
968 | } | |
cf82191d | 969 | s->init_num += i; |
d02b48c6 | 970 | |
cf82191d | 971 | if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) |
d02b48c6 RE |
972 | { |
973 | n2s(p,i); | |
cf82191d BM |
974 | if (i != SSL2_PE_NO_CERTIFICATE) |
975 | { | |
976 | /* not the error message we expected -- let ssl2_part_read handle it */ | |
977 | s->init_num -= 3; | |
978 | ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3); | |
979 | goto end; | |
980 | } | |
981 | ||
982 | if (s->msg_callback) | |
983 | s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */ | |
984 | ||
985 | /* this is the one place where we can recover from an SSL 2.0 error */ | |
986 | ||
d02b48c6 RE |
987 | if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) |
988 | { | |
989 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); | |
990 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
991 | goto end; | |
992 | } | |
993 | ret=1; | |
994 | goto end; | |
995 | } | |
cf82191d | 996 | if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) |
d02b48c6 RE |
997 | { |
998 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); | |
999 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ); | |
1000 | goto end; | |
1001 | } | |
cf82191d BM |
1002 | if (s->init_num != 6) |
1003 | { | |
1004 | SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1005 | goto end; | |
1006 | } | |
1007 | ||
d02b48c6 RE |
1008 | /* ok we have a response */ |
1009 | /* certificate type, there is only one right now. */ | |
1010 | ctype= *(p++); | |
1011 | if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) | |
1012 | { | |
1013 | ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); | |
1014 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT); | |
1015 | goto end; | |
1016 | } | |
1017 | n2s(p,i); s->s2->tmp.clen=i; | |
1018 | n2s(p,i); s->s2->tmp.rlen=i; | |
1019 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D; | |
d02b48c6 RE |
1020 | } |
1021 | ||
1022 | /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ | |
1023 | p=(unsigned char *)s->init_buf->data; | |
cf82191d BM |
1024 | len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; |
1025 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) | |
1026 | { | |
52c29b7b | 1027 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG); |
cf82191d BM |
1028 | goto end; |
1029 | } | |
1030 | j = (int)len - s->init_num; | |
1031 | i = ssl2_read(s,(char *)&(p[s->init_num]),j); | |
d02b48c6 RE |
1032 | if (i < j) |
1033 | { | |
1034 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); | |
1035 | goto end; | |
1036 | } | |
cf82191d BM |
1037 | if (s->msg_callback) |
1038 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */ | |
1039 | p += 6; | |
d02b48c6 | 1040 | |
875a644a RL |
1041 | cp = p; |
1042 | x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen); | |
d02b48c6 RE |
1043 | if (x509 == NULL) |
1044 | { | |
1045 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB); | |
1046 | goto msg_end; | |
1047 | } | |
1048 | ||
f73e07cf | 1049 | if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509))) |
d02b48c6 RE |
1050 | { |
1051 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1052 | goto msg_end; | |
1053 | } | |
1054 | ||
1055 | i=ssl_verify_cert_chain(s,sk); | |
1056 | ||
1057 | if (i) /* we like the packet, now check the chksum */ | |
1058 | { | |
1059 | EVP_MD_CTX ctx; | |
1060 | EVP_PKEY *pkey=NULL; | |
1061 | ||
dbad1690 | 1062 | EVP_MD_CTX_init(&ctx); |
20d2186c | 1063 | EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL); |
d02b48c6 | 1064 | EVP_VerifyUpdate(&ctx,s->s2->key_material, |
54a656ef | 1065 | s->s2->key_material_length); |
d02b48c6 RE |
1066 | EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
1067 | ||
b56bce4f | 1068 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
26a3a48d | 1069 | buf2=OPENSSL_malloc((unsigned int)i); |
d02b48c6 RE |
1070 | if (buf2 == NULL) |
1071 | { | |
1072 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1073 | goto msg_end; | |
1074 | } | |
1075 | p2=buf2; | |
b56bce4f | 1076 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2); |
d02b48c6 | 1077 | EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i); |
26a3a48d | 1078 | OPENSSL_free(buf2); |
d02b48c6 RE |
1079 | |
1080 | pkey=X509_get_pubkey(x509); | |
1081 | if (pkey == NULL) goto end; | |
875a644a | 1082 | i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey); |
a8236c8c | 1083 | EVP_PKEY_free(pkey); |
dbad1690 | 1084 | EVP_MD_CTX_cleanup(&ctx); |
d02b48c6 RE |
1085 | |
1086 | if (i) | |
1087 | { | |
1088 | if (s->session->peer != NULL) | |
1089 | X509_free(s->session->peer); | |
1090 | s->session->peer=x509; | |
1091 | CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509); | |
b1fe6ca1 | 1092 | s->session->verify_result = s->verify_result; |
d02b48c6 RE |
1093 | ret=1; |
1094 | goto end; | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM); | |
1099 | goto msg_end; | |
1100 | } | |
1101 | } | |
1102 | else | |
1103 | { | |
1104 | msg_end: | |
1105 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); | |
1106 | } | |
1107 | end: | |
f73e07cf | 1108 | sk_X509_free(sk); |
a8236c8c | 1109 | X509_free(x509); |
d02b48c6 RE |
1110 | return(ret); |
1111 | } | |
1112 | ||
6b691a5c UM |
1113 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, |
1114 | unsigned char *to, int padding) | |
d02b48c6 RE |
1115 | { |
1116 | RSA *rsa; | |
1117 | int i; | |
1118 | ||
58964a49 | 1119 | if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) |
d02b48c6 RE |
1120 | { |
1121 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY); | |
1122 | return(-1); | |
1123 | } | |
58964a49 | 1124 | if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) |
d02b48c6 RE |
1125 | { |
1126 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); | |
1127 | return(-1); | |
1128 | } | |
58964a49 | 1129 | rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; |
d02b48c6 RE |
1130 | |
1131 | /* we have the public key */ | |
1132 | i=RSA_private_decrypt(len,from,to,rsa,padding); | |
1133 | if (i < 0) | |
1134 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB); | |
1135 | return(i); | |
1136 | } | |
bc36ee62 | 1137 | #else /* !OPENSSL_NO_SSL2 */ |
752d706a BL |
1138 | |
1139 | # if PEDANTIC | |
1140 | static void *dummy=&dummy; | |
1141 | # endif | |
1142 | ||
79df9d62 | 1143 | #endif |