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 #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
  66 typedef struct ssl_session_asn1_st
  67         {
  68         ASN1_INTEGER version;
  69         ASN1_INTEGER ssl_version;
  70         ASN1_OCTET_STRING cipher;
  71         ASN1_OCTET_STRING comp_id;
  72         ASN1_OCTET_STRING master_key;
  73         ASN1_OCTET_STRING session_id;
  74         ASN1_OCTET_STRING session_id_context;
  75         ASN1_OCTET_STRING key_arg;
  76 #ifndef OPENSSL_NO_KRB5
  77         ASN1_OCTET_STRING krb5_princ;
  78 #endif /* OPENSSL_NO_KRB5 */
  79         ASN1_INTEGER time;
  80         ASN1_INTEGER timeout;
  81         ASN1_INTEGER verify_result;
  82 #ifndef OPENSSL_NO_TLSEXT
  83         ASN1_OCTET_STRING tlsext_hostname;
  84         ASN1_INTEGER tlsext_tick_lifetime;
  85         ASN1_OCTET_STRING tlsext_tick;
  86 #endif /* OPENSSL_NO_TLSEXT */
  87         } SSL_SESSION_ASN1;
  88
  89 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
  90         {
  91 #define LSIZE2 (sizeof(long)*2)
  92         int v1=0,v2=0,v3=0,v4=0,v5=0;
  93         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2], cbuf;
  94         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
  95 #ifndef OPENSSL_NO_TLSEXT
  96         int v6=0,v9=0,v10=0;
  97         unsigned char ibuf6[LSIZE2];
  98 #endif
  99 #ifndef OPENSSL_NO_COMP
 100         int v11=0;
 101 #endif
 102         long l;
 103         SSL_SESSION_ASN1 a;
 104         M_ASN1_I2D_vars(in);
 105
 106         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
 107                 return(0);
 108
 109         /* Note that I cheat in the following 2 assignments.  I know
 110          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
 111          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
 112          * This is a bit evil but makes things simple, no dynamic allocation
 113          * to clean up :-) */
 114         a.version.length=LSIZE2;
 115         a.version.type=V_ASN1_INTEGER;
 116         a.version.data=ibuf1;
 117         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 118
 119         a.ssl_version.length=LSIZE2;
 120         a.ssl_version.type=V_ASN1_INTEGER;
 121         a.ssl_version.data=ibuf2;
 122         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 123
 124         a.cipher.type=V_ASN1_OCTET_STRING;
 125         a.cipher.data=buf;
 126
 127         if (in->cipher == NULL)
 128                 l=in->cipher_id;
 129         else
 130                 l=in->cipher->id;
 131         if (in->ssl_version == SSL2_VERSION)
 132                 {
 133                 a.cipher.length=3;
 134                 buf[0]=((unsigned char)(l>>16L))&0xff;
 135                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 136                 buf[2]=((unsigned char)(l     ))&0xff;
 137                 }
 138         else
 139                 {
 140                 a.cipher.length=2;
 141                 buf[0]=((unsigned char)(l>>8L))&0xff;
 142                 buf[1]=((unsigned char)(l    ))&0xff;
 143                 }
 144
 145 #ifndef OPENSSL_NO_COMP
 146         if (in->compress_meth)
 147                 {
 148                 cbuf = (unsigned char)in->compress_meth;
 149                 a.comp_id.length = 1;
 150                 a.comp_id.type = V_ASN1_OCTET_STRING;
 151                 a.comp_id.data = &cbuf;
 152                 }
 153 #endif
 154
 155         a.master_key.length=in->master_key_length;
 156         a.master_key.type=V_ASN1_OCTET_STRING;
 157         a.master_key.data=in->master_key;
 158
 159         a.session_id.length=in->session_id_length;
 160         a.session_id.type=V_ASN1_OCTET_STRING;
 161         a.session_id.data=in->session_id;
 162
 163         a.session_id_context.length=in->sid_ctx_length;
 164         a.session_id_context.type=V_ASN1_OCTET_STRING;
 165         a.session_id_context.data=in->sid_ctx;
 166
 167         a.key_arg.length=in->key_arg_length;
 168         a.key_arg.type=V_ASN1_OCTET_STRING;
 169         a.key_arg.data=in->key_arg;
 170
 171 #ifndef OPENSSL_NO_KRB5
 172         if (in->krb5_client_princ_len)
 173                 {
 174                 a.krb5_princ.length=in->krb5_client_princ_len;
 175                 a.krb5_princ.type=V_ASN1_OCTET_STRING;
 176                 a.krb5_princ.data=in->krb5_client_princ;
 177                 }
 178 #endif /* OPENSSL_NO_KRB5 */
 179
 180         if (in->time != 0L)
 181                 {
 182                 a.time.length=LSIZE2;
 183                 a.time.type=V_ASN1_INTEGER;
 184                 a.time.data=ibuf3;
 185                 ASN1_INTEGER_set(&(a.time),in->time);
 186                 }
 187
 188         if (in->timeout != 0L)
 189                 {
 190                 a.timeout.length=LSIZE2;
 191                 a.timeout.type=V_ASN1_INTEGER;
 192                 a.timeout.data=ibuf4;
 193                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 194                 }
 195
 196         if (in->verify_result != X509_V_OK)
 197                 {
 198                 a.verify_result.length=LSIZE2;
 199                 a.verify_result.type=V_ASN1_INTEGER;
 200                 a.verify_result.data=ibuf5;
 201                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
 202                 }
 203
 204 #ifndef OPENSSL_NO_TLSEXT
 205         if (in->tlsext_hostname)
 206                 {
 207                 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
 208                 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
 209                 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
 210                 }
 211         if (in->tlsext_tick)
 212                 {
 213                 a.tlsext_tick.length= in->tlsext_ticklen;
 214                 a.tlsext_tick.type=V_ASN1_OCTET_STRING;
 215                 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick;
 216                 /* If we have a ticket set session ID to empty because
 217                  * it will be bogus. If liftime hint is -1 treat as a special
 218                  * case because the session is being used as a container
 219                  */
 220                 if (in->tlsext_ticklen && (in->tlsext_tick_lifetime_hint != -1))
 221                         a.session_id.length=0;
 222                 }
 223         if (in->tlsext_tick_lifetime_hint > 0)
 224                 {
 225                 a.tlsext_tick_lifetime.length=LSIZE2;
 226                 a.tlsext_tick_lifetime.type=V_ASN1_INTEGER;
 227                 a.tlsext_tick_lifetime.data=ibuf6;
 228                 ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint);
 229                 }
 230 #endif /* OPENSSL_NO_TLSEXT */
 231         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 232         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 233         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 234         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 235         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 236 #ifndef OPENSSL_NO_KRB5
 237         if (in->krb5_client_princ_len)
 238                 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 239 #endif /* OPENSSL_NO_KRB5 */
 240         if (in->key_arg_length > 0)
 241                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 242         if (in->time != 0L)
 243                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 244         if (in->timeout != 0L)
 245                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 246         if (in->peer != NULL)
 247                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 248         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 249         if (in->verify_result != X509_V_OK)
 250                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
 251
 252 #ifndef OPENSSL_NO_TLSEXT
 253         if (in->tlsext_tick_lifetime_hint > 0)
 254                 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
 255         if (in->tlsext_tick)
 256                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
 257         if (in->tlsext_hostname)
 258                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 259 #ifndef OPENSSL_NO_COMP
 260         if (in->compress_meth)
 261                 M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
 262 #endif
 263 #endif /* OPENSSL_NO_TLSEXT */
 264         M_ASN1_I2D_seq_total();
 265
 266         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 267         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 268         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 269         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 270         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 271 #ifndef OPENSSL_NO_KRB5
 272         if (in->krb5_client_princ_len)
 273                 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 274 #endif /* OPENSSL_NO_KRB5 */
 275         if (in->key_arg_length > 0)
 276                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 277         if (in->time != 0L)
 278                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 279         if (in->timeout != 0L)
 280                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 281         if (in->peer != NULL)
 282                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 283         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 284                                v4);
 285         if (in->verify_result != X509_V_OK)
 286                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
 287 #ifndef OPENSSL_NO_TLSEXT
 288         if (in->tlsext_hostname)
 289                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 290         if (in->tlsext_tick_lifetime_hint > 0)
 291                 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9);
 292         if (in->tlsext_tick)
 293                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10);
 294 #endif /* OPENSSL_NO_TLSEXT */
 295 #ifndef OPENSSL_NO_COMP
 296         if (in->compress_meth)
 297                 M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11);
 298 #endif
 299         M_ASN1_I2D_finish();
 300         }
 301
 302 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
 303              long length)
 304         {
 305         int version,ssl_version=0,i;
 306         long id;
 307         ASN1_INTEGER ai,*aip;
 308         ASN1_OCTET_STRING os,*osp;
 309         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 310
 311         aip= &ai;
 312         osp= &os;
 313
 314         M_ASN1_D2I_Init();
 315         M_ASN1_D2I_start_sequence();
 316
 317         ai.data=NULL; ai.length=0;
 318         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 319         version=(int)ASN1_INTEGER_get(aip);
 320         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 321
 322         /* we don't care about the version right now :-) */
 323         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 324         ssl_version=(int)ASN1_INTEGER_get(aip);
 325         ret->ssl_version=ssl_version;
 326         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 327
 328         os.data=NULL; os.length=0;
 329         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 330         if (ssl_version == SSL2_VERSION)
 331                 {
 332                 if (os.length != 3)
 333                         {
 334                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 335                         goto err;
 336                         }
 337                 id=0x02000000L|
 338                         ((unsigned long)os.data[0]<<16L)|
 339                         ((unsigned long)os.data[1]<< 8L)|
 340                          (unsigned long)os.data[2];
 341                 }
 342         else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 343                 {
 344                 if (os.length != 2)
 345                         {
 346                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 347                         goto err;
 348                         }
 349                 id=0x03000000L|
 350                         ((unsigned long)os.data[0]<<8L)|
 351                          (unsigned long)os.data[1];
 352                 }
 353         else
 354                 {
 355                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 356                 return(NULL);
 357                 }
 358
 359         ret->cipher=NULL;
 360         ret->cipher_id=id;
 361
 362         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 363         if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 364                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 365         else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
 366                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 367
 368         if (os.length > i)
 369                 os.length = i;
 370         if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
 371                 os.length = sizeof(ret->session_id);
 372
 373         ret->session_id_length=os.length;
 374         OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
 375         memcpy(ret->session_id,os.data,os.length);
 376
 377         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 378         if (os.length > SSL_MAX_MASTER_KEY_LENGTH)
 379                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 380         else
 381                 ret->master_key_length=os.length;
 382         memcpy(ret->master_key,os.data,ret->master_key_length);
 383
 384         os.length=0;
 385
 386 #ifndef OPENSSL_NO_KRB5
 387         os.length=0;
 388         M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
 389         if (os.data)
 390                 {
 391                 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 392                         ret->krb5_client_princ_len=0;
 393                 else
 394                         ret->krb5_client_princ_len=os.length;
 395                 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
 396                 OPENSSL_free(os.data);
 397                 os.data = NULL;
 398                 os.length = 0;
 399                 }
 400         else
 401                 ret->krb5_client_princ_len=0;
 402 #endif /* OPENSSL_NO_KRB5 */
 403
 404         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 405         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 406                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 407         else
 408                 ret->key_arg_length=os.length;
 409         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 410         if (os.data != NULL) OPENSSL_free(os.data);
 411
 412         ai.length=0;
 413         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 414         if (ai.data != NULL)
 415                 {
 416                 ret->time=ASN1_INTEGER_get(aip);
 417                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 418                 }
 419         else
 420                 ret->time=(unsigned long)time(NULL);
 421
 422         ai.length=0;
 423         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 424         if (ai.data != NULL)
 425                 {
 426                 ret->timeout=ASN1_INTEGER_get(aip);
 427                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 428                 }
 429         else
 430                 ret->timeout=3;
 431
 432         if (ret->peer != NULL)
 433                 {
 434                 X509_free(ret->peer);
 435                 ret->peer=NULL;
 436                 }
 437         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 438
 439         os.length=0;
 440         os.data=NULL;
 441         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 442
 443         if(os.data != NULL)
 444             {
 445             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 446                 {
 447                 ret->sid_ctx_length=os.length;
 448                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 449                 }
 450             else
 451                 {
 452                 ret->sid_ctx_length=os.length;
 453                 memcpy(ret->sid_ctx,os.data,os.length);
 454                 }
 455             OPENSSL_free(os.data); os.data=NULL; os.length=0;
 456             }
 457         else
 458             ret->sid_ctx_length=0;
 459
 460         ai.length=0;
 461         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
 462         if (ai.data != NULL)
 463                 {
 464                 ret->verify_result=ASN1_INTEGER_get(aip);
 465                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 466                 }
 467         else
 468                 ret->verify_result=X509_V_OK;
 469
 470 #ifndef OPENSSL_NO_TLSEXT
 471         os.length=0;
 472         os.data=NULL;
 473         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
 474         if (os.data)
 475                 {
 476                 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
 477                 OPENSSL_free(os.data);
 478                 os.data = NULL;
 479                 os.length = 0;
 480                 }
 481         else
 482                 ret->tlsext_hostname=NULL;
 483         ai.length=0;
 484         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9);
 485         if (ai.data != NULL)
 486                 {
 487                 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip);
 488                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 489                 }
 490         else if (ret->tlsext_ticklen && ret->session_id_length)
 491                 ret->tlsext_tick_lifetime_hint = -1;
 492         else
 493                 ret->tlsext_tick_lifetime_hint = 0;
 494         os.length=0;
 495         os.data=NULL;
 496         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
 497         if (os.data)
 498                 {
 499                 ret->tlsext_tick = os.data;
 500                 ret->tlsext_ticklen = os.length;
 501                 os.data = NULL;
 502                 os.length = 0;
 503 #if 0
 504                 /* There are two ways to detect a resumed ticket sesion.
 505                  * One is to set a random session ID and then the server
 506                  * must return a match in ServerHello. This allows the normal
 507                  * client session ID matching to work.
 508                  */
 509                 if (ret->session_id_length == 0)
 510                         {
 511                         ret->session_id_length=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 512                         RAND_pseudo_bytes(ret->session_id,
 513                                                 ret->session_id_length);
 514                         }
 515 #endif
 516                 }
 517         else
 518                 ret->tlsext_tick=NULL;
 519 #endif /* OPENSSL_NO_TLSEXT */
 520 #ifndef OPENSSL_NO_COMP
 521         os.length=0;
 522         os.data=NULL;
 523         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,11);
 524         if (os.data)
 525                 {
 526                 ret->compress_meth = os.data[0];
 527                 OPENSSL_free(os.data);
 528                 os.data = NULL;
 529                 }
 530 #endif
 531
 532         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 533         }