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