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