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The Android Open Source Project656d9c72009-03-03 19:30:25 -08001/* ssl/ssl_asn1.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <stdlib.h>
61#include "ssl_locl.h"
62#include <openssl/asn1_mac.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65
66typedef struct ssl_session_asn1_st
67 {
68 ASN1_INTEGER version;
69 ASN1_INTEGER ssl_version;
70 ASN1_OCTET_STRING cipher;
71 ASN1_OCTET_STRING master_key;
72 ASN1_OCTET_STRING session_id;
73 ASN1_OCTET_STRING session_id_context;
74 ASN1_OCTET_STRING key_arg;
75#ifndef OPENSSL_NO_KRB5
76 ASN1_OCTET_STRING krb5_princ;
77#endif /* OPENSSL_NO_KRB5 */
78 ASN1_INTEGER time;
79 ASN1_INTEGER timeout;
80 ASN1_INTEGER verify_result;
81#ifndef OPENSSL_NO_TLSEXT
82 ASN1_OCTET_STRING tlsext_hostname;
83 ASN1_INTEGER tlsext_tick_lifetime;
84 ASN1_OCTET_STRING tlsext_tick;
85#endif /* OPENSSL_NO_TLSEXT */
86 } SSL_SESSION_ASN1;
87
88int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
89 {
90#define LSIZE2 (sizeof(long)*2)
91 int v1=0,v2=0,v3=0,v4=0,v5=0;
92 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
93 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
94#ifndef OPENSSL_NO_TLSEXT
95 int v6=0,v9=0,v10=0;
96 unsigned char ibuf6[LSIZE2];
97#endif
98 long l;
99 SSL_SESSION_ASN1 a;
100 M_ASN1_I2D_vars(in);
101
102 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
103 return(0);
104
105 /* Note that I cheat in the following 2 assignments. I know
106 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
107 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
108 * This is a bit evil but makes things simple, no dynamic allocation
109 * to clean up :-) */
110 a.version.length=LSIZE2;
111 a.version.type=V_ASN1_INTEGER;
112 a.version.data=ibuf1;
113 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
114
115 a.ssl_version.length=LSIZE2;
116 a.ssl_version.type=V_ASN1_INTEGER;
117 a.ssl_version.data=ibuf2;
118 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
119
120 a.cipher.type=V_ASN1_OCTET_STRING;
121 a.cipher.data=buf;
122
123 if (in->cipher == NULL)
124 l=in->cipher_id;
125 else
126 l=in->cipher->id;
127 if (in->ssl_version == SSL2_VERSION)
128 {
129 a.cipher.length=3;
130 buf[0]=((unsigned char)(l>>16L))&0xff;
131 buf[1]=((unsigned char)(l>> 8L))&0xff;
132 buf[2]=((unsigned char)(l ))&0xff;
133 }
134 else
135 {
136 a.cipher.length=2;
137 buf[0]=((unsigned char)(l>>8L))&0xff;
138 buf[1]=((unsigned char)(l ))&0xff;
139 }
140
141 a.master_key.length=in->master_key_length;
142 a.master_key.type=V_ASN1_OCTET_STRING;
143 a.master_key.data=in->master_key;
144
145 a.session_id.length=in->session_id_length;
146 a.session_id.type=V_ASN1_OCTET_STRING;
147 a.session_id.data=in->session_id;
148
149 a.session_id_context.length=in->sid_ctx_length;
150 a.session_id_context.type=V_ASN1_OCTET_STRING;
151 a.session_id_context.data=in->sid_ctx;
152
153 a.key_arg.length=in->key_arg_length;
154 a.key_arg.type=V_ASN1_OCTET_STRING;
155 a.key_arg.data=in->key_arg;
156
157#ifndef OPENSSL_NO_KRB5
158 if (in->krb5_client_princ_len)
159 {
160 a.krb5_princ.length=in->krb5_client_princ_len;
161 a.krb5_princ.type=V_ASN1_OCTET_STRING;
162 a.krb5_princ.data=in->krb5_client_princ;
163 }
164#endif /* OPENSSL_NO_KRB5 */
165
166 if (in->time != 0L)
167 {
168 a.time.length=LSIZE2;
169 a.time.type=V_ASN1_INTEGER;
170 a.time.data=ibuf3;
171 ASN1_INTEGER_set(&(a.time),in->time);
172 }
173
174 if (in->timeout != 0L)
175 {
176 a.timeout.length=LSIZE2;
177 a.timeout.type=V_ASN1_INTEGER;
178 a.timeout.data=ibuf4;
179 ASN1_INTEGER_set(&(a.timeout),in->timeout);
180 }
181
182 if (in->verify_result != X509_V_OK)
183 {
184 a.verify_result.length=LSIZE2;
185 a.verify_result.type=V_ASN1_INTEGER;
186 a.verify_result.data=ibuf5;
187 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
188 }
189
190#ifndef OPENSSL_NO_TLSEXT
191 if (in->tlsext_hostname)
192 {
193 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
194 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
195 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
196 }
197 if (in->tlsext_tick)
198 {
199 a.tlsext_tick.length= in->tlsext_ticklen;
200 a.tlsext_tick.type=V_ASN1_OCTET_STRING;
201 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick;
202 /* If we have a ticket set session ID to empty because
203 * it will be bogus. If liftime hint is -1 treat as a special
204 * case because the session is being used as a container
205 */
206 if (in->tlsext_ticklen && (in->tlsext_tick_lifetime_hint != -1))
207 a.session_id.length=0;
208 }
209 if (in->tlsext_tick_lifetime_hint > 0)
210 {
211 a.tlsext_tick_lifetime.length=LSIZE2;
212 a.tlsext_tick_lifetime.type=V_ASN1_INTEGER;
213 a.tlsext_tick_lifetime.data=ibuf6;
214 ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint);
215 }
216#endif /* OPENSSL_NO_TLSEXT */
217 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER);
218 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER);
219 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING);
220 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING);
221 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING);
222#ifndef OPENSSL_NO_KRB5
223 if (in->krb5_client_princ_len)
224 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
225#endif /* OPENSSL_NO_KRB5 */
226 if (in->key_arg_length > 0)
227 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
228 if (in->time != 0L)
229 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
230 if (in->timeout != 0L)
231 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
232 if (in->peer != NULL)
233 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
234 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
235 if (in->verify_result != X509_V_OK)
236 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
237
238#ifndef OPENSSL_NO_TLSEXT
239 if (in->tlsext_tick_lifetime_hint > 0)
240 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
241 if (in->tlsext_tick)
242 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
243 if (in->tlsext_hostname)
244 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
245#endif /* OPENSSL_NO_TLSEXT */
246 M_ASN1_I2D_seq_total();
247
248 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER);
249 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER);
250 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING);
251 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING);
252 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING);
253#ifndef OPENSSL_NO_KRB5
254 if (in->krb5_client_princ_len)
255 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
256#endif /* OPENSSL_NO_KRB5 */
257 if (in->key_arg_length > 0)
258 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
259 if (in->time != 0L)
260 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
261 if (in->timeout != 0L)
262 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
263 if (in->peer != NULL)
264 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
265 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
266 v4);
267 if (in->verify_result != X509_V_OK)
268 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
269#ifndef OPENSSL_NO_TLSEXT
270 if (in->tlsext_hostname)
271 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
272 if (in->tlsext_tick_lifetime_hint > 0)
273 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
274 if (in->tlsext_tick)
275 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
276#endif /* OPENSSL_NO_TLSEXT */
277 M_ASN1_I2D_finish();
278 }
279
280SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
281 long length)
282 {
283 int version,ssl_version=0,i;
284 long id;
285 ASN1_INTEGER ai,*aip;
286 ASN1_OCTET_STRING os,*osp;
287 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
288
289 aip= &ai;
290 osp= &os;
291
292 M_ASN1_D2I_Init();
293 M_ASN1_D2I_start_sequence();
294
295 ai.data=NULL; ai.length=0;
296 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
297 version=(int)ASN1_INTEGER_get(aip);
298 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
299
300 /* we don't care about the version right now :-) */
301 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
302 ssl_version=(int)ASN1_INTEGER_get(aip);
303 ret->ssl_version=ssl_version;
304 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
305
306 os.data=NULL; os.length=0;
307 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
308 if (ssl_version == SSL2_VERSION)
309 {
310 if (os.length != 3)
311 {
312 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
313 goto err;
314 }
315 id=0x02000000L|
316 ((unsigned long)os.data[0]<<16L)|
317 ((unsigned long)os.data[1]<< 8L)|
318 (unsigned long)os.data[2];
319 }
320 else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
321 {
322 if (os.length != 2)
323 {
324 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
325 goto err;
326 }
327 id=0x03000000L|
328 ((unsigned long)os.data[0]<<8L)|
329 (unsigned long)os.data[1];
330 }
331 else
332 {
333 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
334 return(NULL);
335 }
336
337 ret->cipher=NULL;
338 ret->cipher_id=id;
339
340 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
341 if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
342 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
343 else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
344 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
345
346 if (os.length > i)
347 os.length = i;
348 if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
349 os.length = sizeof(ret->session_id);
350
351 ret->session_id_length=os.length;
352 OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
353 memcpy(ret->session_id,os.data,os.length);
354
355 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
356 if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
357 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
358 else
359 ret->master_key_length=os.length;
360 memcpy(ret->master_key,os.data,ret->master_key_length);
361
362 os.length=0;
363
364#ifndef OPENSSL_NO_KRB5
365 os.length=0;
366 M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
367 if (os.data)
368 {
369 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
370 ret->krb5_client_princ_len=0;
371 else
372 ret->krb5_client_princ_len=os.length;
373 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
374 OPENSSL_free(os.data);
375 os.data = NULL;
376 os.length = 0;
377 }
378 else
379 ret->krb5_client_princ_len=0;
380#endif /* OPENSSL_NO_KRB5 */
381
382 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
383 if (os.length > SSL_MAX_KEY_ARG_LENGTH)
384 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
385 else
386 ret->key_arg_length=os.length;
387 memcpy(ret->key_arg,os.data,ret->key_arg_length);
388 if (os.data != NULL) OPENSSL_free(os.data);
389
390 ai.length=0;
391 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
392 if (ai.data != NULL)
393 {
394 ret->time=ASN1_INTEGER_get(aip);
395 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
396 }
397 else
398 ret->time=(unsigned long)time(NULL);
399
400 ai.length=0;
401 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
402 if (ai.data != NULL)
403 {
404 ret->timeout=ASN1_INTEGER_get(aip);
405 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
406 }
407 else
408 ret->timeout=3;
409
410 if (ret->peer != NULL)
411 {
412 X509_free(ret->peer);
413 ret->peer=NULL;
414 }
415 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
416
417 os.length=0;
418 os.data=NULL;
419 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
420
421 if(os.data != NULL)
422 {
423 if (os.length > SSL_MAX_SID_CTX_LENGTH)
424 {
425 ret->sid_ctx_length=os.length;
426 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
427 }
428 else
429 {
430 ret->sid_ctx_length=os.length;
431 memcpy(ret->sid_ctx,os.data,os.length);
432 }
433 OPENSSL_free(os.data); os.data=NULL; os.length=0;
434 }
435 else
436 ret->sid_ctx_length=0;
437
438 ai.length=0;
439 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
440 if (ai.data != NULL)
441 {
442 ret->verify_result=ASN1_INTEGER_get(aip);
443 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
444 }
445 else
446 ret->verify_result=X509_V_OK;
447
448#ifndef OPENSSL_NO_TLSEXT
449 os.length=0;
450 os.data=NULL;
451 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
452 if (os.data)
453 {
454 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
455 OPENSSL_free(os.data);
456 os.data = NULL;
457 os.length = 0;
458 }
459 else
460 ret->tlsext_hostname=NULL;
461 ai.length=0;
462 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9);
463 if (ai.data != NULL)
464 {
465 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip);
466 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
467 }
468 else if (ret->tlsext_ticklen && ret->session_id_length)
469 ret->tlsext_tick_lifetime_hint = -1;
470 else
471 ret->tlsext_tick_lifetime_hint = 0;
472 os.length=0;
473 os.data=NULL;
474 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
475 if (os.data)
476 {
477 ret->tlsext_tick = os.data;
478 ret->tlsext_ticklen = os.length;
479 os.data = NULL;
480 os.length = 0;
481#if 0
482 /* There are two ways to detect a resumed ticket sesion.
483 * One is to set a random session ID and then the server
484 * must return a match in ServerHello. This allows the normal
485 * client session ID matching to work.
486 */
487 if (ret->session_id_length == 0)
488 {
489 ret->session_id_length=SSL3_MAX_SSL_SESSION_ID_LENGTH;
490 RAND_pseudo_bytes(ret->session_id,
491 ret->session_id_length);
492 }
493#endif
494 }
495 else
496 ret->tlsext_tick=NULL;
497#endif /* OPENSSL_NO_TLSEXT */
498
499 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
500 }