xref: /freebsd/crypto/openssl/ssl/ssl_asn1.c (revision ee7b0571c2c18bdec848ed2044223cc88db29bd8)
1 /* 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  * Copyright 2005 Nokia. All rights reserved.
60  *
61  * The portions of the attached software ("Contribution") is developed by
62  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
63  * license.
64  *
65  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
66  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
67  * support (see RFC 4279) to OpenSSL.
68  *
69  * No patent licenses or other rights except those expressly stated in
70  * the OpenSSL open source license shall be deemed granted or received
71  * expressly, by implication, estoppel, or otherwise.
72  *
73  * No assurances are provided by Nokia that the Contribution does not
74  * infringe the patent or other intellectual property rights of any third
75  * party or that the license provides you with all the necessary rights
76  * to make use of the Contribution.
77  *
78  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
79  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
80  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
81  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
82  * OTHERWISE.
83  */
84 
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include "ssl_locl.h"
88 #include <openssl/asn1_mac.h>
89 #include <openssl/objects.h>
90 #include <openssl/x509.h>
91 
92 typedef struct ssl_session_asn1_st
93 	{
94 	ASN1_INTEGER version;
95 	ASN1_INTEGER ssl_version;
96 	ASN1_OCTET_STRING cipher;
97 	ASN1_OCTET_STRING comp_id;
98 	ASN1_OCTET_STRING master_key;
99 	ASN1_OCTET_STRING session_id;
100 	ASN1_OCTET_STRING session_id_context;
101 	ASN1_OCTET_STRING key_arg;
102 #ifndef OPENSSL_NO_KRB5
103         ASN1_OCTET_STRING krb5_princ;
104 #endif /* OPENSSL_NO_KRB5 */
105 	ASN1_INTEGER time;
106 	ASN1_INTEGER timeout;
107 	ASN1_INTEGER verify_result;
108 #ifndef OPENSSL_NO_TLSEXT
109 	ASN1_OCTET_STRING tlsext_hostname;
110 	ASN1_INTEGER tlsext_tick_lifetime;
111 	ASN1_OCTET_STRING tlsext_tick;
112 #endif /* OPENSSL_NO_TLSEXT */
113 #ifndef OPENSSL_NO_PSK
114 	ASN1_OCTET_STRING psk_identity_hint;
115 	ASN1_OCTET_STRING psk_identity;
116 #endif /* OPENSSL_NO_PSK */
117 #ifndef OPENSSL_NO_SRP
118 	ASN1_OCTET_STRING srp_username;
119 #endif /* OPENSSL_NO_SRP */
120 	} SSL_SESSION_ASN1;
121 
122 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
123 	{
124 #define LSIZE2 (sizeof(long)*2)
125 	int v1=0,v2=0,v3=0,v4=0,v5=0,v7=0,v8=0;
126 	unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
127 	unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
128 #ifndef OPENSSL_NO_TLSEXT
129 	int v6=0,v9=0,v10=0;
130 	unsigned char ibuf6[LSIZE2];
131 #endif
132 #ifndef OPENSSL_NO_COMP
133 	unsigned char cbuf;
134 	int v11=0;
135 #endif
136 #ifndef OPENSSL_NO_SRP
137 	int v12=0;
138 #endif
139 	long l;
140 	SSL_SESSION_ASN1 a;
141 	M_ASN1_I2D_vars(in);
142 
143 	if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
144 		return(0);
145 
146 	/* Note that I cheat in the following 2 assignments.  I know
147 	 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
148 	 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
149 	 * This is a bit evil but makes things simple, no dynamic allocation
150 	 * to clean up :-) */
151 	a.version.length=LSIZE2;
152 	a.version.type=V_ASN1_INTEGER;
153 	a.version.data=ibuf1;
154 	ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
155 
156 	a.ssl_version.length=LSIZE2;
157 	a.ssl_version.type=V_ASN1_INTEGER;
158 	a.ssl_version.data=ibuf2;
159 	ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
160 
161 	a.cipher.type=V_ASN1_OCTET_STRING;
162 	a.cipher.data=buf;
163 
164 	if (in->cipher == NULL)
165 		l=in->cipher_id;
166 	else
167 		l=in->cipher->id;
168 	if (in->ssl_version == SSL2_VERSION)
169 		{
170 		a.cipher.length=3;
171 		buf[0]=((unsigned char)(l>>16L))&0xff;
172 		buf[1]=((unsigned char)(l>> 8L))&0xff;
173 		buf[2]=((unsigned char)(l     ))&0xff;
174 		}
175 	else
176 		{
177 		a.cipher.length=2;
178 		buf[0]=((unsigned char)(l>>8L))&0xff;
179 		buf[1]=((unsigned char)(l    ))&0xff;
180 		}
181 
182 #ifndef OPENSSL_NO_COMP
183 	if (in->compress_meth)
184 		{
185 		cbuf = (unsigned char)in->compress_meth;
186 		a.comp_id.length = 1;
187 		a.comp_id.type = V_ASN1_OCTET_STRING;
188 		a.comp_id.data = &cbuf;
189 		}
190 #endif
191 
192 	a.master_key.length=in->master_key_length;
193 	a.master_key.type=V_ASN1_OCTET_STRING;
194 	a.master_key.data=in->master_key;
195 
196 	a.session_id.length=in->session_id_length;
197 	a.session_id.type=V_ASN1_OCTET_STRING;
198 	a.session_id.data=in->session_id;
199 
200 	a.session_id_context.length=in->sid_ctx_length;
201 	a.session_id_context.type=V_ASN1_OCTET_STRING;
202 	a.session_id_context.data=in->sid_ctx;
203 
204 	a.key_arg.length=in->key_arg_length;
205 	a.key_arg.type=V_ASN1_OCTET_STRING;
206 	a.key_arg.data=in->key_arg;
207 
208 #ifndef OPENSSL_NO_KRB5
209 	if (in->krb5_client_princ_len)
210 		{
211 		a.krb5_princ.length=in->krb5_client_princ_len;
212 		a.krb5_princ.type=V_ASN1_OCTET_STRING;
213 		a.krb5_princ.data=in->krb5_client_princ;
214 		}
215 #endif /* OPENSSL_NO_KRB5 */
216 
217 	if (in->time != 0L)
218 		{
219 		a.time.length=LSIZE2;
220 		a.time.type=V_ASN1_INTEGER;
221 		a.time.data=ibuf3;
222 		ASN1_INTEGER_set(&(a.time),in->time);
223 		}
224 
225 	if (in->timeout != 0L)
226 		{
227 		a.timeout.length=LSIZE2;
228 		a.timeout.type=V_ASN1_INTEGER;
229 		a.timeout.data=ibuf4;
230 		ASN1_INTEGER_set(&(a.timeout),in->timeout);
231 		}
232 
233 	if (in->verify_result != X509_V_OK)
234 		{
235 		a.verify_result.length=LSIZE2;
236 		a.verify_result.type=V_ASN1_INTEGER;
237 		a.verify_result.data=ibuf5;
238 		ASN1_INTEGER_set(&a.verify_result,in->verify_result);
239 		}
240 
241 #ifndef OPENSSL_NO_TLSEXT
242 	if (in->tlsext_hostname)
243                 {
244                 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
245                 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
246                 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
247                 }
248 	if (in->tlsext_tick)
249                 {
250                 a.tlsext_tick.length= in->tlsext_ticklen;
251                 a.tlsext_tick.type=V_ASN1_OCTET_STRING;
252                 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick;
253                 }
254 	if (in->tlsext_tick_lifetime_hint > 0)
255 		{
256 		a.tlsext_tick_lifetime.length=LSIZE2;
257 		a.tlsext_tick_lifetime.type=V_ASN1_INTEGER;
258 		a.tlsext_tick_lifetime.data=ibuf6;
259 		ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint);
260 		}
261 #endif /* OPENSSL_NO_TLSEXT */
262 #ifndef OPENSSL_NO_PSK
263 	if (in->psk_identity_hint)
264 		{
265 		a.psk_identity_hint.length=strlen(in->psk_identity_hint);
266 		a.psk_identity_hint.type=V_ASN1_OCTET_STRING;
267 		a.psk_identity_hint.data=(unsigned char *)(in->psk_identity_hint);
268 		}
269 	if (in->psk_identity)
270 		{
271 		a.psk_identity.length=strlen(in->psk_identity);
272 		a.psk_identity.type=V_ASN1_OCTET_STRING;
273 		a.psk_identity.data=(unsigned char *)(in->psk_identity);
274 		}
275 #endif /* OPENSSL_NO_PSK */
276 #ifndef OPENSSL_NO_SRP
277 	if (in->srp_username)
278 		{
279 		a.srp_username.length=strlen(in->srp_username);
280 		a.srp_username.type=V_ASN1_OCTET_STRING;
281 		a.srp_username.data=(unsigned char *)(in->srp_username);
282 		}
283 #endif /* OPENSSL_NO_SRP */
284 
285 	M_ASN1_I2D_len(&(a.version),		i2d_ASN1_INTEGER);
286 	M_ASN1_I2D_len(&(a.ssl_version),	i2d_ASN1_INTEGER);
287 	M_ASN1_I2D_len(&(a.cipher),		i2d_ASN1_OCTET_STRING);
288 	M_ASN1_I2D_len(&(a.session_id),		i2d_ASN1_OCTET_STRING);
289 	M_ASN1_I2D_len(&(a.master_key),		i2d_ASN1_OCTET_STRING);
290 #ifndef OPENSSL_NO_KRB5
291 	if (in->krb5_client_princ_len)
292         	M_ASN1_I2D_len(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
293 #endif /* OPENSSL_NO_KRB5 */
294 	if (in->key_arg_length > 0)
295 		M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
296 	if (in->time != 0L)
297 		M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
298 	if (in->timeout != 0L)
299 		M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
300 	if (in->peer != NULL)
301 		M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
302 	M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
303 	if (in->verify_result != X509_V_OK)
304 		M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
305 
306 #ifndef OPENSSL_NO_TLSEXT
307 	if (in->tlsext_tick_lifetime_hint > 0)
308       	 	M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
309 	if (in->tlsext_tick)
310         	M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
311 	if (in->tlsext_hostname)
312         	M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
313 #ifndef OPENSSL_NO_COMP
314 	if (in->compress_meth)
315         	M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
316 #endif
317 #endif /* OPENSSL_NO_TLSEXT */
318 #ifndef OPENSSL_NO_PSK
319 	if (in->psk_identity_hint)
320         	M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
321 	if (in->psk_identity)
322         	M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
323 #endif /* OPENSSL_NO_PSK */
324 #ifndef OPENSSL_NO_SRP
325 	if (in->srp_username)
326         	M_ASN1_I2D_len_EXP_opt(&(a.srp_username), i2d_ASN1_OCTET_STRING,12,v12);
327 #endif /* OPENSSL_NO_SRP */
328 
329 	M_ASN1_I2D_seq_total();
330 
331 	M_ASN1_I2D_put(&(a.version),		i2d_ASN1_INTEGER);
332 	M_ASN1_I2D_put(&(a.ssl_version),	i2d_ASN1_INTEGER);
333 	M_ASN1_I2D_put(&(a.cipher),		i2d_ASN1_OCTET_STRING);
334 	M_ASN1_I2D_put(&(a.session_id),		i2d_ASN1_OCTET_STRING);
335 	M_ASN1_I2D_put(&(a.master_key),		i2d_ASN1_OCTET_STRING);
336 #ifndef OPENSSL_NO_KRB5
337 	if (in->krb5_client_princ_len)
338         	M_ASN1_I2D_put(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
339 #endif /* OPENSSL_NO_KRB5 */
340 	if (in->key_arg_length > 0)
341 		M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
342 	if (in->time != 0L)
343 		M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
344 	if (in->timeout != 0L)
345 		M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
346 	if (in->peer != NULL)
347 		M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
348 	M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
349 			       v4);
350 	if (in->verify_result != X509_V_OK)
351 		M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
352 #ifndef OPENSSL_NO_TLSEXT
353 	if (in->tlsext_hostname)
354         	M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
355 #endif /* OPENSSL_NO_TLSEXT */
356 #ifndef OPENSSL_NO_PSK
357 	if (in->psk_identity_hint)
358 		M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
359 	if (in->psk_identity)
360 		M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
361 #endif /* OPENSSL_NO_PSK */
362 #ifndef OPENSSL_NO_TLSEXT
363 	if (in->tlsext_tick_lifetime_hint > 0)
364       	 	M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
365 	if (in->tlsext_tick)
366         	M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
367 #endif /* OPENSSL_NO_TLSEXT */
368 #ifndef OPENSSL_NO_COMP
369 	if (in->compress_meth)
370         	M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
371 #endif
372 #ifndef OPENSSL_NO_SRP
373 	if (in->srp_username)
374 		M_ASN1_I2D_put_EXP_opt(&(a.srp_username), i2d_ASN1_OCTET_STRING,12,v12);
375 #endif /* OPENSSL_NO_SRP */
376 	M_ASN1_I2D_finish();
377 	}
378 
379 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
380 			     long length)
381 	{
382 	int ssl_version=0,i;
383 	long id;
384 	ASN1_INTEGER ai,*aip;
385 	ASN1_OCTET_STRING os,*osp;
386 	M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
387 
388 	aip= &ai;
389 	osp= &os;
390 
391 	M_ASN1_D2I_Init();
392 	M_ASN1_D2I_start_sequence();
393 
394 	ai.data=NULL; ai.length=0;
395 	M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
396 	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
397 
398 	/* we don't care about the version right now :-) */
399 	M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
400 	ssl_version=(int)ASN1_INTEGER_get(aip);
401 	ret->ssl_version=ssl_version;
402 	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
403 
404 	os.data=NULL; os.length=0;
405 	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
406 	if (ssl_version == SSL2_VERSION)
407 		{
408 		if (os.length != 3)
409 			{
410 			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
411 			c.line=__LINE__;
412 			goto err;
413 			}
414 		id=0x02000000L|
415 			((unsigned long)os.data[0]<<16L)|
416 			((unsigned long)os.data[1]<< 8L)|
417 			 (unsigned long)os.data[2];
418 		}
419 	else if ((ssl_version>>8) >= SSL3_VERSION_MAJOR)
420 		{
421 		if (os.length != 2)
422 			{
423 			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
424 			c.line=__LINE__;
425 			goto err;
426 			}
427 		id=0x03000000L|
428 			((unsigned long)os.data[0]<<8L)|
429 			 (unsigned long)os.data[1];
430 		}
431 	else
432 		{
433 		c.error=SSL_R_UNKNOWN_SSL_VERSION;
434 		c.line=__LINE__;
435 		goto err;
436 		}
437 
438 	ret->cipher=NULL;
439 	ret->cipher_id=id;
440 
441 	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
442 	if ((ssl_version>>8) >= SSL3_VERSION_MAJOR)
443 		i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
444 	else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
445 		i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
446 
447 	if (os.length > i)
448 		os.length = i;
449 	if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
450 		os.length = sizeof(ret->session_id);
451 
452 	ret->session_id_length=os.length;
453 	OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
454 	memcpy(ret->session_id,os.data,os.length);
455 
456 	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
457 	if (os.length > SSL_MAX_MASTER_KEY_LENGTH)
458 		ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
459 	else
460 		ret->master_key_length=os.length;
461 	memcpy(ret->master_key,os.data,ret->master_key_length);
462 
463 	os.length=0;
464 
465 #ifndef OPENSSL_NO_KRB5
466 	os.length=0;
467 	M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
468 	if (os.data)
469 		{
470         	if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
471             		ret->krb5_client_princ_len=0;
472 		else
473 			ret->krb5_client_princ_len=os.length;
474 		memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
475 		OPENSSL_free(os.data);
476 		os.data = NULL;
477 		os.length = 0;
478 		}
479 	else
480 		ret->krb5_client_princ_len=0;
481 #endif /* OPENSSL_NO_KRB5 */
482 
483 	M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
484 	if (os.length > SSL_MAX_KEY_ARG_LENGTH)
485 		ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
486 	else
487 		ret->key_arg_length=os.length;
488 	memcpy(ret->key_arg,os.data,ret->key_arg_length);
489 	if (os.data != NULL) OPENSSL_free(os.data);
490 
491 	ai.length=0;
492 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
493 	if (ai.data != NULL)
494 		{
495 		ret->time=ASN1_INTEGER_get(aip);
496 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
497 		}
498 	else
499 		ret->time=(unsigned long)time(NULL);
500 
501 	ai.length=0;
502 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
503 	if (ai.data != NULL)
504 		{
505 		ret->timeout=ASN1_INTEGER_get(aip);
506 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
507 		}
508 	else
509 		ret->timeout=3;
510 
511 	if (ret->peer != NULL)
512 		{
513 		X509_free(ret->peer);
514 		ret->peer=NULL;
515 		}
516 	M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
517 
518 	os.length=0;
519 	os.data=NULL;
520 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
521 
522 	if(os.data != NULL)
523 	    {
524 	    if (os.length > SSL_MAX_SID_CTX_LENGTH)
525 		{
526 		c.error=SSL_R_BAD_LENGTH;
527 		c.line=__LINE__;
528 		goto err;
529 		}
530 	    else
531 		{
532 		ret->sid_ctx_length=os.length;
533 		memcpy(ret->sid_ctx,os.data,os.length);
534 		}
535 	    OPENSSL_free(os.data); os.data=NULL; os.length=0;
536 	    }
537 	else
538 	    ret->sid_ctx_length=0;
539 
540 	ai.length=0;
541 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
542 	if (ai.data != NULL)
543 		{
544 		ret->verify_result=ASN1_INTEGER_get(aip);
545 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
546 		}
547 	else
548 		ret->verify_result=X509_V_OK;
549 
550 #ifndef OPENSSL_NO_TLSEXT
551 	os.length=0;
552 	os.data=NULL;
553 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
554 	if (os.data)
555 		{
556 		ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
557 		OPENSSL_free(os.data);
558 		os.data = NULL;
559 		os.length = 0;
560 		}
561 	else
562 		ret->tlsext_hostname=NULL;
563 #endif /* OPENSSL_NO_TLSEXT */
564 
565 #ifndef OPENSSL_NO_PSK
566 	os.length=0;
567 	os.data=NULL;
568 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,7);
569 	if (os.data)
570 		{
571 		ret->psk_identity_hint = BUF_strndup((char *)os.data, os.length);
572 		OPENSSL_free(os.data);
573 		os.data = NULL;
574 		os.length = 0;
575 		}
576 	else
577 		ret->psk_identity_hint=NULL;
578 
579 	os.length=0;
580 	os.data=NULL;
581 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,8);
582 	if (os.data)
583 		{
584 		ret->psk_identity = BUF_strndup((char *)os.data, os.length);
585 		OPENSSL_free(os.data);
586 		os.data = NULL;
587 		os.length = 0;
588 		}
589 	else
590 		ret->psk_identity=NULL;
591 #endif /* OPENSSL_NO_PSK */
592 
593 #ifndef OPENSSL_NO_TLSEXT
594 	ai.length=0;
595 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9);
596 	if (ai.data != NULL)
597 		{
598 		ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip);
599 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
600 		}
601 	else if (ret->tlsext_ticklen && ret->session_id_length)
602 		ret->tlsext_tick_lifetime_hint = -1;
603 	else
604 		ret->tlsext_tick_lifetime_hint=0;
605 	os.length=0;
606 	os.data=NULL;
607 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
608 	if (os.data)
609 		{
610 		ret->tlsext_tick = os.data;
611 		ret->tlsext_ticklen = os.length;
612 		os.data = NULL;
613 		os.length = 0;
614 		}
615 	else
616 		ret->tlsext_tick=NULL;
617 #endif /* OPENSSL_NO_TLSEXT */
618 #ifndef OPENSSL_NO_COMP
619 	os.length=0;
620 	os.data=NULL;
621 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,11);
622 	if (os.data)
623 		{
624 		ret->compress_meth = os.data[0];
625 		OPENSSL_free(os.data);
626 		os.data = NULL;
627 		}
628 #endif
629 
630 #ifndef OPENSSL_NO_SRP
631 	os.length=0;
632 	os.data=NULL;
633 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,12);
634 	if (os.data)
635 		{
636 		ret->srp_username = BUF_strndup((char *)os.data, os.length);
637 		OPENSSL_free(os.data);
638 		os.data = NULL;
639 		os.length = 0;
640 		}
641 	else
642 		ret->srp_username=NULL;
643 #endif /* OPENSSL_NO_SRP */
644 
645 	M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
646 	}
647