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