Some precautions to avoid potential security-relevant problems.
[openssl.git] / ssl / ssl_asn1.c
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 master_key;
98         ASN1_OCTET_STRING session_id;
99         ASN1_OCTET_STRING session_id_context;
100         ASN1_OCTET_STRING key_arg;
101 #ifndef OPENSSL_NO_KRB5
102         ASN1_OCTET_STRING krb5_princ;
103 #endif /* OPENSSL_NO_KRB5 */
104         ASN1_INTEGER time;
105         ASN1_INTEGER timeout;
106         ASN1_INTEGER verify_result;
107 #ifndef OPENSSL_NO_TLSEXT
108         ASN1_OCTET_STRING tlsext_hostname;
109         ASN1_INTEGER tlsext_tick_lifetime;
110         ASN1_OCTET_STRING tlsext_tick;
111 #endif /* OPENSSL_NO_TLSEXT */
112 #ifndef OPENSSL_NO_PSK
113         ASN1_OCTET_STRING psk_identity_hint;
114         ASN1_OCTET_STRING psk_identity;
115 #endif /* OPENSSL_NO_PSK */
116         } SSL_SESSION_ASN1;
117
118 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
119         {
120 #define LSIZE2 (sizeof(long)*2)
121         int v1=0,v2=0,v3=0,v4=0,v5=0,v7=0,v8=0;
122         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
123         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
124 #ifndef OPENSSL_NO_TLSEXT
125         int v6=0,v9=0,v10=0;
126         unsigned char ibuf6[LSIZE2];
127 #endif
128         long l;
129         SSL_SESSION_ASN1 a;
130         M_ASN1_I2D_vars(in);
131
132         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
133                 return(0);
134
135         /* Note that I cheat in the following 2 assignments.  I know
136          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
137          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
138          * This is a bit evil but makes things simple, no dynamic allocation
139          * to clean up :-) */
140         a.version.length=LSIZE2;
141         a.version.type=V_ASN1_INTEGER;
142         a.version.data=ibuf1;
143         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
144
145         a.ssl_version.length=LSIZE2;
146         a.ssl_version.type=V_ASN1_INTEGER;
147         a.ssl_version.data=ibuf2;
148         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
149
150         a.cipher.type=V_ASN1_OCTET_STRING;
151         a.cipher.data=buf;
152
153         if (in->cipher == NULL)
154                 l=in->cipher_id;
155         else
156                 l=in->cipher->id;
157         if (in->ssl_version == SSL2_VERSION)
158                 {
159                 a.cipher.length=3;
160                 buf[0]=((unsigned char)(l>>16L))&0xff;
161                 buf[1]=((unsigned char)(l>> 8L))&0xff;
162                 buf[2]=((unsigned char)(l     ))&0xff;
163                 }
164         else
165                 {
166                 a.cipher.length=2;
167                 buf[0]=((unsigned char)(l>>8L))&0xff;
168                 buf[1]=((unsigned char)(l    ))&0xff;
169                 }
170
171         a.master_key.length=in->master_key_length;
172         a.master_key.type=V_ASN1_OCTET_STRING;
173         a.master_key.data=in->master_key;
174
175         a.session_id.length=in->session_id_length;
176         a.session_id.type=V_ASN1_OCTET_STRING;
177         a.session_id.data=in->session_id;
178
179         a.session_id_context.length=in->sid_ctx_length;
180         a.session_id_context.type=V_ASN1_OCTET_STRING;
181         a.session_id_context.data=in->sid_ctx;
182
183         a.key_arg.length=in->key_arg_length;
184         a.key_arg.type=V_ASN1_OCTET_STRING;
185         a.key_arg.data=in->key_arg;
186
187 #ifndef OPENSSL_NO_KRB5
188         if (in->krb5_client_princ_len)
189                 {
190                 a.krb5_princ.length=in->krb5_client_princ_len;
191                 a.krb5_princ.type=V_ASN1_OCTET_STRING;
192                 a.krb5_princ.data=in->krb5_client_princ;
193                 }
194 #endif /* OPENSSL_NO_KRB5 */
195
196         if (in->time != 0L)
197                 {
198                 a.time.length=LSIZE2;
199                 a.time.type=V_ASN1_INTEGER;
200                 a.time.data=ibuf3;
201                 ASN1_INTEGER_set(&(a.time),in->time);
202                 }
203
204         if (in->timeout != 0L)
205                 {
206                 a.timeout.length=LSIZE2;
207                 a.timeout.type=V_ASN1_INTEGER;
208                 a.timeout.data=ibuf4;
209                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
210                 }
211
212         if (in->verify_result != X509_V_OK)
213                 {
214                 a.verify_result.length=LSIZE2;
215                 a.verify_result.type=V_ASN1_INTEGER;
216                 a.verify_result.data=ibuf5;
217                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
218                 }
219
220 #ifndef OPENSSL_NO_TLSEXT
221         if (in->tlsext_hostname)
222                 {
223                 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
224                 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
225                 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
226                 }
227         if (in->tlsext_tick)
228                 {
229                 a.tlsext_tick.length= in->tlsext_ticklen;
230                 a.tlsext_tick.type=V_ASN1_OCTET_STRING;
231                 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick;
232                 /* If we have a ticket set session ID to empty because
233                  * it will be bogus. If liftime hint is -1 treat as a special
234                  * case because the session is being used as a container
235                  */
236                 if (in->tlsext_ticklen && (in->tlsext_tick_lifetime_hint != -1))
237                         a.session_id.length=0;
238                 }
239         if (in->tlsext_tick_lifetime_hint > 0)
240                 {
241                 a.tlsext_tick_lifetime.length=LSIZE2;
242                 a.tlsext_tick_lifetime.type=V_ASN1_INTEGER;
243                 a.tlsext_tick_lifetime.data=ibuf6;
244                 ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint);
245                 }
246 #endif /* OPENSSL_NO_TLSEXT */
247 #ifndef OPENSSL_NO_PSK
248         if (in->psk_identity_hint)
249                 {
250                 a.psk_identity_hint.length=strlen(in->psk_identity_hint);
251                 a.psk_identity_hint.type=V_ASN1_OCTET_STRING;
252                 a.psk_identity_hint.data=(unsigned char *)(in->psk_identity_hint);
253                 }
254         if (in->psk_identity)
255                 {
256                 a.psk_identity.length=strlen(in->psk_identity);
257                 a.psk_identity.type=V_ASN1_OCTET_STRING;
258                 a.psk_identity.data=(unsigned char *)(in->psk_identity);
259                 }
260 #endif /* OPENSSL_NO_PSK */
261
262         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
263         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
264         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
265         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
266         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
267 #ifndef OPENSSL_NO_KRB5
268         if (in->krb5_client_princ_len)
269                 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
270 #endif /* OPENSSL_NO_KRB5 */
271         if (in->key_arg_length > 0)
272                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
273         if (in->time != 0L)
274                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
275         if (in->timeout != 0L)
276                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
277         if (in->peer != NULL)
278                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
279         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
280         if (in->verify_result != X509_V_OK)
281                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
282
283 #ifndef OPENSSL_NO_TLSEXT
284         if (in->tlsext_tick_lifetime_hint > 0)
285                 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
286         if (in->tlsext_tick)
287                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
288         if (in->tlsext_hostname)
289                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
290 #endif /* OPENSSL_NO_TLSEXT */
291 #ifndef OPENSSL_NO_PSK
292         if (in->psk_identity_hint)
293                 M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
294         if (in->psk_identity)
295                 M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
296 #endif /* OPENSSL_NO_PSK */
297
298         M_ASN1_I2D_seq_total();
299
300         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
301         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
302         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
303         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
304         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
305 #ifndef OPENSSL_NO_KRB5
306         if (in->krb5_client_princ_len)
307                 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
308 #endif /* OPENSSL_NO_KRB5 */
309         if (in->key_arg_length > 0)
310                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
311         if (in->time != 0L)
312                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
313         if (in->timeout != 0L)
314                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
315         if (in->peer != NULL)
316                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
317         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
318                                v4);
319         if (in->verify_result != X509_V_OK)
320                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
321 #ifndef OPENSSL_NO_TLSEXT
322         if (in->tlsext_hostname)
323                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
324 #endif /* OPENSSL_NO_TLSEXT */
325 #ifndef OPENSSL_NO_PSK
326         if (in->psk_identity_hint)
327                 M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
328         if (in->psk_identity)
329                 M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
330 #endif /* OPENSSL_NO_PSK */
331 #ifndef OPENSSL_NO_TLSEXT
332         if (in->tlsext_tick_lifetime_hint > 0)
333                 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
334         if (in->tlsext_tick)
335                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
336 #endif /* OPENSSL_NO_TLSEXT */
337         M_ASN1_I2D_finish();
338         }
339
340 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
341              long length)
342         {
343         int version,ssl_version=0,i;
344         long id;
345         ASN1_INTEGER ai,*aip;
346         ASN1_OCTET_STRING os,*osp;
347         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
348
349         aip= &ai;
350         osp= &os;
351
352         M_ASN1_D2I_Init();
353         M_ASN1_D2I_start_sequence();
354
355         ai.data=NULL; ai.length=0;
356         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
357         version=(int)ASN1_INTEGER_get(aip);
358         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
359
360         /* we don't care about the version right now :-) */
361         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
362         ssl_version=(int)ASN1_INTEGER_get(aip);
363         ret->ssl_version=ssl_version;
364         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
365
366         os.data=NULL; os.length=0;
367         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
368         if (ssl_version == SSL2_VERSION)
369                 {
370                 if (os.length != 3)
371                         {
372                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
373                         goto err;
374                         }
375                 id=0x02000000L|
376                         ((unsigned long)os.data[0]<<16L)|
377                         ((unsigned long)os.data[1]<< 8L)|
378                          (unsigned long)os.data[2];
379                 }
380         else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
381                 {
382                 if (os.length != 2)
383                         {
384                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
385                         goto err;
386                         }
387                 id=0x03000000L|
388                         ((unsigned long)os.data[0]<<8L)|
389                          (unsigned long)os.data[1];
390                 }
391         else
392                 {
393                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
394                 return(NULL);
395                 }
396         
397         ret->cipher=NULL;
398         ret->cipher_id=id;
399
400         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
401         if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
402                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
403         else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
404                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
405
406         if (os.length > i)
407                 os.length = i;
408         if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
409                 os.length = sizeof(ret->session_id);
410
411         ret->session_id_length=os.length;
412         OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
413         memcpy(ret->session_id,os.data,os.length);
414
415         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
416         if (os.length > SSL_MAX_MASTER_KEY_LENGTH)
417                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
418         else
419                 ret->master_key_length=os.length;
420         memcpy(ret->master_key,os.data,ret->master_key_length);
421
422         os.length=0;
423
424 #ifndef OPENSSL_NO_KRB5
425         os.length=0;
426         M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
427         if (os.data)
428                 {
429                 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
430                         ret->krb5_client_princ_len=0;
431                 else
432                         ret->krb5_client_princ_len=os.length;
433                 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
434                 OPENSSL_free(os.data);
435                 os.data = NULL;
436                 os.length = 0;
437                 }
438         else
439                 ret->krb5_client_princ_len=0;
440 #endif /* OPENSSL_NO_KRB5 */
441
442         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
443         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
444                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
445         else
446                 ret->key_arg_length=os.length;
447         memcpy(ret->key_arg,os.data,ret->key_arg_length);
448         if (os.data != NULL) OPENSSL_free(os.data);
449
450         ai.length=0;
451         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
452         if (ai.data != NULL)
453                 {
454                 ret->time=ASN1_INTEGER_get(aip);
455                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
456                 }
457         else
458                 ret->time=(unsigned long)time(NULL);
459
460         ai.length=0;
461         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
462         if (ai.data != NULL)
463                 {
464                 ret->timeout=ASN1_INTEGER_get(aip);
465                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
466                 }
467         else
468                 ret->timeout=3;
469
470         if (ret->peer != NULL)
471                 {
472                 X509_free(ret->peer);
473                 ret->peer=NULL;
474                 }
475         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
476
477         os.length=0;
478         os.data=NULL;
479         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
480
481         if(os.data != NULL)
482             {
483             if (os.length > SSL_MAX_SID_CTX_LENGTH)
484                 {
485                 ret->sid_ctx_length=os.length;
486                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
487                 }
488             else
489                 {
490                 ret->sid_ctx_length=os.length;
491                 memcpy(ret->sid_ctx,os.data,os.length);
492                 }
493             OPENSSL_free(os.data); os.data=NULL; os.length=0;
494             }
495         else
496             ret->sid_ctx_length=0;
497
498         ai.length=0;
499         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
500         if (ai.data != NULL)
501                 {
502                 ret->verify_result=ASN1_INTEGER_get(aip);
503                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
504                 }
505         else
506                 ret->verify_result=X509_V_OK;
507
508 #ifndef OPENSSL_NO_TLSEXT
509         os.length=0;
510         os.data=NULL;
511         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
512         if (os.data)
513                 {
514                 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
515                 OPENSSL_free(os.data);
516                 os.data = NULL;
517                 os.length = 0;
518                 }
519         else
520                 ret->tlsext_hostname=NULL;
521 #endif /* OPENSSL_NO_TLSEXT */
522
523 #ifndef OPENSSL_NO_PSK
524         os.length=0;
525         os.data=NULL;
526         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,7);
527         if (os.data)
528                 {
529                 ret->psk_identity_hint = BUF_strndup((char *)os.data, os.length);
530                 OPENSSL_free(os.data);
531                 os.data = NULL;
532                 os.length = 0;
533                 }
534         else
535                 ret->psk_identity_hint=NULL;
536 #endif /* OPENSSL_NO_PSK */
537
538 #ifndef OPENSSL_NO_TLSEXT
539         ai.length=0;
540         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9);
541         if (ai.data != NULL)
542                 {
543                 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip);
544                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
545                 }
546         else if (ret->tlsext_ticklen && ret->session_id_length)
547                 ret->tlsext_tick_lifetime_hint = -1;
548         else
549                 ret->tlsext_tick_lifetime_hint=0;
550         os.length=0;
551         os.data=NULL;
552         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
553         if (os.data)
554                 {
555                 ret->tlsext_tick = os.data;
556                 ret->tlsext_ticklen = os.length;
557                 os.data = NULL;
558                 os.length = 0;
559 #if 0
560                 /* There are two ways to detect a resumed ticket sesion.
561                  * One is to set a random session ID and then the server
562                  * must return a match in ServerHello. This allows the normal
563                  * client session ID matching to work.
564                  */ 
565                 if (ret->session_id_length == 0)
566                         {
567                         ret->session_id_length=SSL3_MAX_SSL_SESSION_ID_LENGTH;
568                         RAND_pseudo_bytes(ret->session_id,
569                                                 ret->session_id_length);
570                         }
571 #endif
572                 }
573         else
574                 ret->tlsext_tick=NULL;
575 #endif /* OPENSSL_NO_TLSEXT */
576
577         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
578         }