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 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         } SSL_SESSION_ASN1;
 118
 119 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
 120         {
 121 #define LSIZE2 (sizeof(long)*2)
 122         int v1=0,v2=0,v3=0,v4=0,v5=0,v7=0,v8=0;
 123         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
 124         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
 125 #ifndef OPENSSL_NO_TLSEXT
 126         int v6=0,v9=0,v10=0;
 127         unsigned char ibuf6[LSIZE2];
 128 #endif
 129 #ifndef OPENSSL_NO_COMP
 130         unsigned char cbuf;
 131         int v11=0;
 132 #endif
 133         long l;
 134         SSL_SESSION_ASN1 a;
 135         M_ASN1_I2D_vars(in);
 136
 137         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
 138                 return(0);
 139
 140         /* Note that I cheat in the following 2 assignments.  I know
 141          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
 142          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
 143          * This is a bit evil but makes things simple, no dynamic allocation
 144          * to clean up :-) */
 145         a.version.length=LSIZE2;
 146         a.version.type=V_ASN1_INTEGER;
 147         a.version.data=ibuf1;
 148         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 149
 150         a.ssl_version.length=LSIZE2;
 151         a.ssl_version.type=V_ASN1_INTEGER;
 152         a.ssl_version.data=ibuf2;
 153         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 154
 155         a.cipher.type=V_ASN1_OCTET_STRING;
 156         a.cipher.data=buf;
 157
 158         if (in->cipher == NULL)
 159                 l=in->cipher_id;
 160         else
 161                 l=in->cipher->id;
 162         if (in->ssl_version == SSL2_VERSION)
 163                 {
 164                 a.cipher.length=3;
 165                 buf[0]=((unsigned char)(l>>16L))&0xff;
 166                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 167                 buf[2]=((unsigned char)(l     ))&0xff;
 168                 }
 169         else
 170                 {
 171                 a.cipher.length=2;
 172                 buf[0]=((unsigned char)(l>>8L))&0xff;
 173                 buf[1]=((unsigned char)(l    ))&0xff;
 174                 }
 175
 176 #ifndef OPENSSL_NO_COMP
 177         if (in->compress_meth)
 178                 {
 179                 cbuf = (unsigned char)in->compress_meth;
 180                 a.comp_id.length = 1;
 181                 a.comp_id.type = V_ASN1_OCTET_STRING;
 182                 a.comp_id.data = &cbuf;
 183                 }
 184 #endif
 185
 186         a.master_key.length=in->master_key_length;
 187         a.master_key.type=V_ASN1_OCTET_STRING;
 188         a.master_key.data=in->master_key;
 189
 190         a.session_id.length=in->session_id_length;
 191         a.session_id.type=V_ASN1_OCTET_STRING;
 192         a.session_id.data=in->session_id;
 193
 194         a.session_id_context.length=in->sid_ctx_length;
 195         a.session_id_context.type=V_ASN1_OCTET_STRING;
 196         a.session_id_context.data=in->sid_ctx;
 197
 198         a.key_arg.length=in->key_arg_length;
 199         a.key_arg.type=V_ASN1_OCTET_STRING;
 200         a.key_arg.data=in->key_arg;
 201
 202 #ifndef OPENSSL_NO_KRB5
 203         if (in->krb5_client_princ_len)
 204                 {
 205                 a.krb5_princ.length=in->krb5_client_princ_len;
 206                 a.krb5_princ.type=V_ASN1_OCTET_STRING;
 207                 a.krb5_princ.data=in->krb5_client_princ;
 208                 }
 209 #endif /* OPENSSL_NO_KRB5 */
 210
 211         if (in->time != 0L)
 212                 {
 213                 a.time.length=LSIZE2;
 214                 a.time.type=V_ASN1_INTEGER;
 215                 a.time.data=ibuf3;
 216                 ASN1_INTEGER_set(&(a.time),in->time);
 217                 }
 218
 219         if (in->timeout != 0L)
 220                 {
 221                 a.timeout.length=LSIZE2;
 222                 a.timeout.type=V_ASN1_INTEGER;
 223                 a.timeout.data=ibuf4;
 224                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 225                 }
 226
 227         if (in->verify_result != X509_V_OK)
 228                 {
 229                 a.verify_result.length=LSIZE2;
 230                 a.verify_result.type=V_ASN1_INTEGER;
 231                 a.verify_result.data=ibuf5;
 232                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
 233                 }
 234
 235 #ifndef OPENSSL_NO_TLSEXT
 236         if (in->tlsext_hostname)
 237                 {
 238                 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
 239                 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
 240                 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
 241                 }
 242         if (in->tlsext_tick)
 243                 {
 244                 a.tlsext_tick.length= in->tlsext_ticklen;
 245                 a.tlsext_tick.type=V_ASN1_OCTET_STRING;
 246                 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick;
 247                 /* If we have a ticket set session ID to empty because
 248                  * it will be bogus. If liftime hint is -1 treat as a special
 249                  * case because the session is being used as a container
 250                  */
 251                 if (in->tlsext_ticklen && (in->tlsext_tick_lifetime_hint != -1))
 252                         a.session_id.length=0;
 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
 277         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 278         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 279         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 280         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 281         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 282 #ifndef OPENSSL_NO_KRB5
 283         if (in->krb5_client_princ_len)
 284                 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 285 #endif /* OPENSSL_NO_KRB5 */
 286         if (in->key_arg_length > 0)
 287                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 288         if (in->time != 0L)
 289                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 290         if (in->timeout != 0L)
 291                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 292         if (in->peer != NULL)
 293                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 294         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 295         if (in->verify_result != X509_V_OK)
 296                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
 297
 298 #ifndef OPENSSL_NO_TLSEXT
 299         if (in->tlsext_tick_lifetime_hint > 0)
 300                 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
 301         if (in->tlsext_tick)
 302                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
 303         if (in->tlsext_hostname)
 304                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 305 #ifndef OPENSSL_NO_COMP
 306         if (in->compress_meth)
 307                 M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
 308 #endif
 309 #endif /* OPENSSL_NO_TLSEXT */
 310 #ifndef OPENSSL_NO_PSK
 311         if (in->psk_identity_hint)
 312                 M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
 313         if (in->psk_identity)
 314                 M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
 315 #endif /* OPENSSL_NO_PSK */
 316
 317         M_ASN1_I2D_seq_total();
 318
 319         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 320         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 321         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 322         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 323         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 324 #ifndef OPENSSL_NO_KRB5
 325         if (in->krb5_client_princ_len)
 326                 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 327 #endif /* OPENSSL_NO_KRB5 */
 328         if (in->key_arg_length > 0)
 329                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 330         if (in->time != 0L)
 331                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 332         if (in->timeout != 0L)
 333                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 334         if (in->peer != NULL)
 335                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 336         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 337                                v4);
 338         if (in->verify_result != X509_V_OK)
 339                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
 340 #ifndef OPENSSL_NO_TLSEXT
 341         if (in->tlsext_hostname)
 342                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 343 #endif /* OPENSSL_NO_TLSEXT */
 344 #ifndef OPENSSL_NO_PSK
 345         if (in->psk_identity_hint)
 346                 M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,7,v7);
 347         if (in->psk_identity)
 348                 M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,8,v8);
 349 #endif /* OPENSSL_NO_PSK */
 350 #ifndef OPENSSL_NO_TLSEXT
 351         if (in->tlsext_tick_lifetime_hint > 0)
 352                 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
 353         if (in->tlsext_tick)
 354                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
 355 #endif /* OPENSSL_NO_TLSEXT */
 356 #ifndef OPENSSL_NO_COMP
 357         if (in->compress_meth)
 358                 M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
 359 #endif
 360         M_ASN1_I2D_finish();
 361         }
 362
 363 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
 364                              long length)
 365         {
 366         int version,ssl_version=0,i;
 367         long id;
 368         ASN1_INTEGER ai,*aip;
 369         ASN1_OCTET_STRING os,*osp;
 370         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 371
 372         aip= &ai;
 373         osp= &os;
 374
 375         M_ASN1_D2I_Init();
 376         M_ASN1_D2I_start_sequence();
 377
 378         ai.data=NULL; ai.length=0;
 379         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 380         version=(int)ASN1_INTEGER_get(aip);
 381         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 382
 383         /* we don't care about the version right now :-) */
 384         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 385         ssl_version=(int)ASN1_INTEGER_get(aip);
 386         ret->ssl_version=ssl_version;
 387         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 388
 389         os.data=NULL; os.length=0;
 390         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 391         if (ssl_version == SSL2_VERSION)
 392                 {
 393                 if (os.length != 3)
 394                         {
 395                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 396                         goto err;
 397                         }
 398                 id=0x02000000L|
 399                         ((unsigned long)os.data[0]<<16L)|
 400                         ((unsigned long)os.data[1]<< 8L)|
 401                          (unsigned long)os.data[2];
 402                 }
 403         else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 404                 {
 405                 if (os.length != 2)
 406                         {
 407                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 408                         goto err;
 409                         }
 410                 id=0x03000000L|
 411                         ((unsigned long)os.data[0]<<8L)|
 412                          (unsigned long)os.data[1];
 413                 }
 414         else
 415                 {
 416                 c.error=SSL_R_UNKNOWN_SSL_VERSION;
 417                 goto err;
 418                 }
 419
 420         ret->cipher=NULL;
 421         ret->cipher_id=id;
 422
 423         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 424         if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 425                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 426         else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
 427                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 428
 429         if (os.length > i)
 430                 os.length = i;
 431         if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
 432                 os.length = sizeof(ret->session_id);
 433
 434         ret->session_id_length=os.length;
 435         OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
 436         memcpy(ret->session_id,os.data,os.length);
 437
 438         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 439         if (os.length > SSL_MAX_MASTER_KEY_LENGTH)
 440                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 441         else
 442                 ret->master_key_length=os.length;
 443         memcpy(ret->master_key,os.data,ret->master_key_length);
 444
 445         os.length=0;
 446
 447 #ifndef OPENSSL_NO_KRB5
 448         os.length=0;
 449         M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
 450         if (os.data)
 451                 {
 452                 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 453                         ret->krb5_client_princ_len=0;
 454                 else
 455                         ret->krb5_client_princ_len=os.length;
 456                 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
 457                 OPENSSL_free(os.data);
 458                 os.data = NULL;
 459                 os.length = 0;
 460                 }
 461         else
 462                 ret->krb5_client_princ_len=0;
 463 #endif /* OPENSSL_NO_KRB5 */
 464
 465         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 466         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 467                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 468         else
 469                 ret->key_arg_length=os.length;
 470         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 471         if (os.data != NULL) OPENSSL_free(os.data);
 472
 473         ai.length=0;
 474         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 475         if (ai.data != NULL)
 476                 {
 477                 ret->time=ASN1_INTEGER_get(aip);
 478                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 479                 }
 480         else
 481                 ret->time=(unsigned long)time(NULL);
 482
 483         ai.length=0;
 484         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 485         if (ai.data != NULL)
 486                 {
 487                 ret->timeout=ASN1_INTEGER_get(aip);
 488                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 489                 }
 490         else
 491                 ret->timeout=3;
 492
 493         if (ret->peer != NULL)
 494                 {
 495                 X509_free(ret->peer);
 496                 ret->peer=NULL;
 497                 }
 498         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 499
 500         os.length=0;
 501         os.data=NULL;
 502         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 503
 504         if(os.data != NULL)
 505             {
 506             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 507                 {
 508                 c.error=SSL_R_BAD_LENGTH;
 509                 goto err;
 510                 }
 511             else
 512                 {
 513                 ret->sid_ctx_length=os.length;
 514                 memcpy(ret->sid_ctx,os.data,os.length);
 515                 }
 516             OPENSSL_free(os.data); os.data=NULL; os.length=0;
 517             }
 518         else
 519             ret->sid_ctx_length=0;
 520
 521         ai.length=0;
 522         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
 523         if (ai.data != NULL)
 524                 {
 525                 ret->verify_result=ASN1_INTEGER_get(aip);
 526                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 527                 }
 528         else
 529                 ret->verify_result=X509_V_OK;
 530
 531 #ifndef OPENSSL_NO_TLSEXT
 532         os.length=0;
 533         os.data=NULL;
 534         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
 535         if (os.data)
 536                 {
 537                 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
 538                 OPENSSL_free(os.data);
 539                 os.data = NULL;
 540                 os.length = 0;
 541                 }
 542         else
 543                 ret->tlsext_hostname=NULL;
 544 #endif /* OPENSSL_NO_TLSEXT */
 545
 546 #ifndef OPENSSL_NO_PSK
 547         os.length=0;
 548         os.data=NULL;
 549         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,7);
 550         if (os.data)
 551                 {
 552                 ret->psk_identity_hint = BUF_strndup((char *)os.data, os.length);
 553                 OPENSSL_free(os.data);
 554                 os.data = NULL;
 555                 os.length = 0;
 556                 }
 557         else
 558                 ret->psk_identity_hint=NULL;
 559 #endif /* OPENSSL_NO_PSK */
 560
 561 #ifndef OPENSSL_NO_TLSEXT
 562         ai.length=0;
 563         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9);
 564         if (ai.data != NULL)
 565                 {
 566                 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip);
 567                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 568                 }
 569         else if (ret->tlsext_ticklen && ret->session_id_length)
 570                 ret->tlsext_tick_lifetime_hint = -1;
 571         else
 572                 ret->tlsext_tick_lifetime_hint=0;
 573         os.length=0;
 574         os.data=NULL;
 575         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
 576         if (os.data)
 577                 {
 578                 ret->tlsext_tick = os.data;
 579                 ret->tlsext_ticklen = os.length;
 580                 os.data = NULL;
 581                 os.length = 0;
 582 #if 0
 583                 /* There are two ways to detect a resumed ticket sesion.
 584                  * One is to set a random session ID and then the server
 585                  * must return a match in ServerHello. This allows the normal
 586                  * client session ID matching to work.
 587                  */
 588                 if (ret->session_id_length == 0)
 589                         {
 590                         ret->session_id_length=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 591                         RAND_pseudo_bytes(ret->session_id,
 592                                                 ret->session_id_length);
 593                         }
 594 #endif
 595                 }
 596         else
 597                 ret->tlsext_tick=NULL;
 598 #endif /* OPENSSL_NO_TLSEXT */
 599 #ifndef OPENSSL_NO_COMP
 600         os.length=0;
 601         os.data=NULL;
 602         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,11);
 603         if (os.data)
 604                 {
 605                 ret->compress_meth = os.data[0];
 606                 OPENSSL_free(os.data);
 607                 os.data = NULL;
 608                 }
 609 #endif
 610
 611         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 612         }