crypto/external/bsd/openssl/dist/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     ASN1_INTEGER version;
  94     ASN1_INTEGER ssl_version;
  95     ASN1_OCTET_STRING cipher;
  96     ASN1_OCTET_STRING comp_id;
  97     ASN1_OCTET_STRING master_key;
  98     ASN1_OCTET_STRING session_id;
  99     ASN1_OCTET_STRING session_id_context;
 100     ASN1_OCTET_STRING key_arg;
 101 #ifndef OPENSSL_NO_KRB5
 102     ASN1_OCTET_STRING krb5_princ;
 103 #endif                          /* OPENSSL_NO_KRB5 */
 104     ASN1_INTEGER time;
 105     ASN1_INTEGER timeout;
 106     ASN1_INTEGER verify_result;
 107 #ifndef OPENSSL_NO_TLSEXT
 108     ASN1_OCTET_STRING tlsext_hostname;
 109     ASN1_INTEGER tlsext_tick_lifetime;
 110     ASN1_OCTET_STRING tlsext_tick;
 111 #endif                          /* OPENSSL_NO_TLSEXT */
 112 #ifndef OPENSSL_NO_PSK
 113     ASN1_OCTET_STRING psk_identity_hint;
 114     ASN1_OCTET_STRING psk_identity;
 115 #endif                          /* OPENSSL_NO_PSK */
 116 #ifndef OPENSSL_NO_SRP
 117     ASN1_OCTET_STRING srp_username;
 118 #endif                          /* OPENSSL_NO_SRP */
 119 } SSL_SESSION_ASN1;
 120
 121 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
 122 {
 123 #define LSIZE2 (sizeof(long)*2)
 124     int v1 = 0, v2 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v8 = 0;
 125     unsigned char buf[4], ibuf1[LSIZE2], ibuf2[LSIZE2];
 126     unsigned char ibuf3[LSIZE2], ibuf4[LSIZE2], ibuf5[LSIZE2];
 127 #ifndef OPENSSL_NO_TLSEXT
 128     int v6 = 0, v9 = 0, v10 = 0;
 129     unsigned char ibuf6[LSIZE2];
 130 #endif
 131 #ifndef OPENSSL_NO_COMP
 132     unsigned char cbuf;
 133     int v11 = 0;
 134 #endif
 135 #ifndef OPENSSL_NO_SRP
 136     int v12 = 0;
 137 #endif
 138     long l;
 139     SSL_SESSION_ASN1 a;
 140     M_ASN1_I2D_vars(in);
 141
 142     if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
 143         return (0);
 144
 145     /*
 146      * Note that I cheat in the following 2 assignments.  I know that if the
 147      * ASN1_INTEGER passed to ASN1_INTEGER_set is > sizeof(long)+1, the
 148      * buffer will not be re-OPENSSL_malloc()ed. This is a bit evil but makes
 149      * things simple, no dynamic allocation to clean up :-)
 150      */
 151     a.version.length = LSIZE2;
 152     a.version.type = V_ASN1_INTEGER;
 153     a.version.data = ibuf1;
 154     ASN1_INTEGER_set(&(a.version), SSL_SESSION_ASN1_VERSION);
 155
 156     a.ssl_version.length = LSIZE2;
 157     a.ssl_version.type = V_ASN1_INTEGER;
 158     a.ssl_version.data = ibuf2;
 159     ASN1_INTEGER_set(&(a.ssl_version), in->ssl_version);
 160
 161     a.cipher.type = V_ASN1_OCTET_STRING;
 162     a.cipher.data = buf;
 163
 164     if (in->cipher == NULL)
 165         l = in->cipher_id;
 166     else
 167         l = in->cipher->id;
 168     if (in->ssl_version == SSL2_VERSION) {
 169         a.cipher.length = 3;
 170         buf[0] = ((unsigned char)(l >> 16L)) & 0xff;
 171         buf[1] = ((unsigned char)(l >> 8L)) & 0xff;
 172         buf[2] = ((unsigned char)(l)) & 0xff;
 173     } else {
 174         a.cipher.length = 2;
 175         buf[0] = ((unsigned char)(l >> 8L)) & 0xff;
 176         buf[1] = ((unsigned char)(l)) & 0xff;
 177     }
 178
 179 #ifndef OPENSSL_NO_COMP
 180     if (in->compress_meth) {
 181         cbuf = (unsigned char)in->compress_meth;
 182         a.comp_id.length = 1;
 183         a.comp_id.type = V_ASN1_OCTET_STRING;
 184         a.comp_id.data = &cbuf;
 185     }
 186 #endif
 187
 188     a.master_key.length = in->master_key_length;
 189     a.master_key.type = V_ASN1_OCTET_STRING;
 190     a.master_key.data = in->master_key;
 191
 192     a.session_id.length = in->session_id_length;
 193     a.session_id.type = V_ASN1_OCTET_STRING;
 194     a.session_id.data = in->session_id;
 195
 196     a.session_id_context.length = in->sid_ctx_length;
 197     a.session_id_context.type = V_ASN1_OCTET_STRING;
 198     a.session_id_context.data = in->sid_ctx;
 199
 200     a.key_arg.length = in->key_arg_length;
 201     a.key_arg.type = V_ASN1_OCTET_STRING;
 202     a.key_arg.data = in->key_arg;
 203
 204 #ifndef OPENSSL_NO_KRB5
 205     if (in->krb5_client_princ_len) {
 206         a.krb5_princ.length = in->krb5_client_princ_len;
 207         a.krb5_princ.type = V_ASN1_OCTET_STRING;
 208         a.krb5_princ.data = in->krb5_client_princ;
 209     }
 210 #endif                          /* OPENSSL_NO_KRB5 */
 211
 212     if (in->time != 0L) {
 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         a.timeout.length = LSIZE2;
 221         a.timeout.type = V_ASN1_INTEGER;
 222         a.timeout.data = ibuf4;
 223         ASN1_INTEGER_set(&(a.timeout), in->timeout);
 224     }
 225
 226     if (in->verify_result != X509_V_OK) {
 227         a.verify_result.length = LSIZE2;
 228         a.verify_result.type = V_ASN1_INTEGER;
 229         a.verify_result.data = ibuf5;
 230         ASN1_INTEGER_set(&a.verify_result, in->verify_result);
 231     }
 232 #ifndef OPENSSL_NO_TLSEXT
 233     if (in->tlsext_hostname) {
 234         a.tlsext_hostname.length = strlen(in->tlsext_hostname);
 235         a.tlsext_hostname.type = V_ASN1_OCTET_STRING;
 236         a.tlsext_hostname.data = (unsigned char *)in->tlsext_hostname;
 237     }
 238     if (in->tlsext_tick) {
 239         a.tlsext_tick.length = in->tlsext_ticklen;
 240         a.tlsext_tick.type = V_ASN1_OCTET_STRING;
 241         a.tlsext_tick.data = (unsigned char *)in->tlsext_tick;
 242     }
 243     if (in->tlsext_tick_lifetime_hint > 0) {
 244         a.tlsext_tick_lifetime.length = LSIZE2;
 245         a.tlsext_tick_lifetime.type = V_ASN1_INTEGER;
 246         a.tlsext_tick_lifetime.data = ibuf6;
 247         ASN1_INTEGER_set(&a.tlsext_tick_lifetime,
 248                          in->tlsext_tick_lifetime_hint);
 249     }
 250 #endif                          /* OPENSSL_NO_TLSEXT */
 251 #ifndef OPENSSL_NO_PSK
 252     if (in->psk_identity_hint) {
 253         a.psk_identity_hint.length = strlen(in->psk_identity_hint);
 254         a.psk_identity_hint.type = V_ASN1_OCTET_STRING;
 255         a.psk_identity_hint.data = (unsigned char *)(in->psk_identity_hint);
 256     }
 257     if (in->psk_identity) {
 258         a.psk_identity.length = strlen(in->psk_identity);
 259         a.psk_identity.type = V_ASN1_OCTET_STRING;
 260         a.psk_identity.data = (unsigned char *)(in->psk_identity);
 261     }
 262 #endif                          /* OPENSSL_NO_PSK */
 263 #ifndef OPENSSL_NO_SRP
 264     if (in->srp_username) {
 265         a.srp_username.length = strlen(in->srp_username);
 266         a.srp_username.type = V_ASN1_OCTET_STRING;
 267         a.srp_username.data = (unsigned char *)(in->srp_username);
 268     }
 269 #endif                          /* OPENSSL_NO_SRP */
 270
 271     M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER);
 272     M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER);
 273     M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING);
 274     M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING);
 275     M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING);
 276 #ifndef OPENSSL_NO_KRB5
 277     if (in->krb5_client_princ_len)
 278         M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 279 #endif                          /* OPENSSL_NO_KRB5 */
 280     if (in->key_arg_length > 0)
 281         M_ASN1_I2D_len_IMP_opt(&(a.key_arg), i2d_ASN1_OCTET_STRING);
 282     if (in->time != 0L)
 283         M_ASN1_I2D_len_EXP_opt(&(a.time), i2d_ASN1_INTEGER, 1, v1);
 284     if (in->timeout != 0L)
 285         M_ASN1_I2D_len_EXP_opt(&(a.timeout), i2d_ASN1_INTEGER, 2, v2);
 286     if (in->peer != NULL)
 287         M_ASN1_I2D_len_EXP_opt(in->peer, i2d_X509, 3, v3);
 288     M_ASN1_I2D_len_EXP_opt(&a.session_id_context, i2d_ASN1_OCTET_STRING, 4,
 289                            v4);
 290     if (in->verify_result != X509_V_OK)
 291         M_ASN1_I2D_len_EXP_opt(&(a.verify_result), i2d_ASN1_INTEGER, 5, v5);
 292
 293 #ifndef OPENSSL_NO_TLSEXT
 294     if (in->tlsext_tick_lifetime_hint > 0)
 295         M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER, 9,
 296                                v9);
 297     if (in->tlsext_tick)
 298         M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING, 10,
 299                                v10);
 300     if (in->tlsext_hostname)
 301         M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING, 6,
 302                                v6);
 303 # ifndef OPENSSL_NO_COMP
 304     if (in->compress_meth)
 305         M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING, 11, v11);
 306 # endif
 307 #endif                          /* OPENSSL_NO_TLSEXT */
 308 #ifndef OPENSSL_NO_PSK
 309     if (in->psk_identity_hint)
 310         M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,
 311                                7, v7);
 312     if (in->psk_identity)
 313         M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING, 8,
 314                                v8);
 315 #endif                          /* OPENSSL_NO_PSK */
 316 #ifndef OPENSSL_NO_SRP
 317     if (in->srp_username)
 318         M_ASN1_I2D_len_EXP_opt(&(a.srp_username), i2d_ASN1_OCTET_STRING, 12,
 319                                v12);
 320 #endif                          /* OPENSSL_NO_SRP */
 321
 322     M_ASN1_I2D_seq_total();
 323
 324     M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER);
 325     M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER);
 326     M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING);
 327     M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING);
 328     M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING);
 329 #ifndef OPENSSL_NO_KRB5
 330     if (in->krb5_client_princ_len)
 331         M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 332 #endif                          /* OPENSSL_NO_KRB5 */
 333     if (in->key_arg_length > 0)
 334         M_ASN1_I2D_put_IMP_opt(&(a.key_arg), i2d_ASN1_OCTET_STRING, 0);
 335     if (in->time != 0L)
 336         M_ASN1_I2D_put_EXP_opt(&(a.time), i2d_ASN1_INTEGER, 1, v1);
 337     if (in->timeout != 0L)
 338         M_ASN1_I2D_put_EXP_opt(&(a.timeout), i2d_ASN1_INTEGER, 2, v2);
 339     if (in->peer != NULL)
 340         M_ASN1_I2D_put_EXP_opt(in->peer, i2d_X509, 3, v3);
 341     M_ASN1_I2D_put_EXP_opt(&a.session_id_context, i2d_ASN1_OCTET_STRING, 4,
 342                            v4);
 343     if (in->verify_result != X509_V_OK)
 344         M_ASN1_I2D_put_EXP_opt(&a.verify_result, i2d_ASN1_INTEGER, 5, v5);
 345 #ifndef OPENSSL_NO_TLSEXT
 346     if (in->tlsext_hostname)
 347         M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING, 6,
 348                                v6);
 349 #endif                          /* OPENSSL_NO_TLSEXT */
 350 #ifndef OPENSSL_NO_PSK
 351     if (in->psk_identity_hint)
 352         M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,
 353                                7, v7);
 354     if (in->psk_identity)
 355         M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING, 8,
 356                                v8);
 357 #endif                          /* OPENSSL_NO_PSK */
 358 #ifndef OPENSSL_NO_TLSEXT
 359     if (in->tlsext_tick_lifetime_hint > 0)
 360         M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER, 9,
 361                                v9);
 362     if (in->tlsext_tick)
 363         M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING, 10,
 364                                v10);
 365 #endif                          /* OPENSSL_NO_TLSEXT */
 366 #ifndef OPENSSL_NO_COMP
 367     if (in->compress_meth)
 368         M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING, 11, v11);
 369 #endif
 370 #ifndef OPENSSL_NO_SRP
 371     if (in->srp_username)
 372         M_ASN1_I2D_put_EXP_opt(&(a.srp_username), i2d_ASN1_OCTET_STRING, 12,
 373                                v12);
 374 #endif                          /* OPENSSL_NO_SRP */
 375     M_ASN1_I2D_finish();
 376 }
 377
 378 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
 379                              long length)
 380 {
 381     int ssl_version = 0, i;
 382     long id;
 383     ASN1_INTEGER ai, *aip;
 384     ASN1_OCTET_STRING os, *osp;
 385     M_ASN1_D2I_vars(a, SSL_SESSION *, SSL_SESSION_new);
 386
 387     aip = &ai;
 388     osp = &os;
 389
 390     M_ASN1_D2I_Init();
 391     M_ASN1_D2I_start_sequence();
 392
 393     ai.data = NULL;
 394     ai.length = 0;
 395     M_ASN1_D2I_get_x(ASN1_INTEGER, aip, d2i_ASN1_INTEGER);
 396     if (ai.data != NULL) {
 397         OPENSSL_free(ai.data);
 398         ai.data = NULL;
 399         ai.length = 0;
 400     }
 401
 402     /* we don't care about the version right now :-) */
 403     M_ASN1_D2I_get_x(ASN1_INTEGER, aip, d2i_ASN1_INTEGER);
 404     ssl_version = (int)ASN1_INTEGER_get(aip);
 405     ret->ssl_version = ssl_version;
 406     if (ai.data != NULL) {
 407         OPENSSL_free(ai.data);
 408         ai.data = NULL;
 409         ai.length = 0;
 410     }
 411
 412     os.data = NULL;
 413     os.length = 0;
 414     M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING);
 415     if (ssl_version == SSL2_VERSION) {
 416         if (os.length != 3) {
 417             c.error = SSL_R_CIPHER_CODE_WRONG_LENGTH;
 418             c.line = __LINE__;
 419             goto err;
 420         }
 421         id = 0x02000000L |
 422             ((unsigned long)os.data[0] << 16L) |
 423             ((unsigned long)os.data[1] << 8L) | (unsigned long)os.data[2];
 424     } else if ((ssl_version >> 8) == SSL3_VERSION_MAJOR
 425         || (ssl_version >> 8) == DTLS1_VERSION_MAJOR
 426         || ssl_version == DTLS1_BAD_VER) {
 427         if (os.length != 2) {
 428             c.error = SSL_R_CIPHER_CODE_WRONG_LENGTH;
 429             c.line = __LINE__;
 430             goto err;
 431         }
 432         id = 0x03000000L |
 433             ((unsigned long)os.data[0] << 8L) | (unsigned long)os.data[1];
 434     } else {
 435         c.error = SSL_R_UNKNOWN_SSL_VERSION;
 436         c.line = __LINE__;
 437         goto err;
 438     }
 439
 440     ret->cipher = NULL;
 441     ret->cipher_id = id;
 442
 443     M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING);
 444     if ((ssl_version >> 8) >= SSL3_VERSION_MAJOR)
 445         i = SSL3_MAX_SSL_SESSION_ID_LENGTH;
 446     else                        /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
 447         i = SSL2_MAX_SSL_SESSION_ID_LENGTH;
 448
 449     if (os.length > i)
 450         os.length = i;
 451     if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
 452         os.length = sizeof(ret->session_id);
 453
 454     ret->session_id_length = os.length;
 455     OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
 456     memcpy(ret->session_id, os.data, os.length);
 457
 458     M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING);
 459     if (os.length > SSL_MAX_MASTER_KEY_LENGTH)
 460         ret->master_key_length = SSL_MAX_MASTER_KEY_LENGTH;
 461     else
 462         ret->master_key_length = os.length;
 463     memcpy(ret->master_key, os.data, ret->master_key_length);
 464
 465     os.length = 0;
 466
 467 #ifndef OPENSSL_NO_KRB5
 468     os.length = 0;
 469     M_ASN1_D2I_get_opt(osp, d2i_ASN1_OCTET_STRING, V_ASN1_OCTET_STRING);
 470     if (os.data) {
 471         if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 472             ret->krb5_client_princ_len = 0;
 473         else
 474             ret->krb5_client_princ_len = os.length;
 475         memcpy(ret->krb5_client_princ, os.data, ret->krb5_client_princ_len);
 476         OPENSSL_free(os.data);
 477         os.data = NULL;
 478         os.length = 0;
 479     } else
 480         ret->krb5_client_princ_len = 0;
 481 #endif                          /* OPENSSL_NO_KRB5 */
 482
 483     M_ASN1_D2I_get_IMP_opt(osp, d2i_ASN1_OCTET_STRING, 0,
 484                            V_ASN1_OCTET_STRING);
 485     if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 486         ret->key_arg_length = SSL_MAX_KEY_ARG_LENGTH;
 487     else
 488         ret->key_arg_length = os.length;
 489     memcpy(ret->key_arg, os.data, ret->key_arg_length);
 490     if (os.data != NULL)
 491         OPENSSL_free(os.data);
 492
 493     ai.length = 0;
 494     M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 1);
 495     if (ai.data != NULL) {
 496         ret->time = ASN1_INTEGER_get(aip);
 497         OPENSSL_free(ai.data);
 498         ai.data = NULL;
 499         ai.length = 0;
 500     } else
 501         ret->time = (unsigned long)time(NULL);
 502
 503     ai.length = 0;
 504     M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 2);
 505     if (ai.data != NULL) {
 506         ret->timeout = ASN1_INTEGER_get(aip);
 507         OPENSSL_free(ai.data);
 508         ai.data = NULL;
 509         ai.length = 0;
 510     } else
 511         ret->timeout = 3;
 512
 513     if (ret->peer != NULL) {
 514         X509_free(ret->peer);
 515         ret->peer = NULL;
 516     }
 517     M_ASN1_D2I_get_EXP_opt(ret->peer, d2i_X509, 3);
 518
 519     os.length = 0;
 520     os.data = NULL;
 521     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 4);
 522
 523     if (os.data != NULL) {
 524         if (os.length > SSL_MAX_SID_CTX_LENGTH) {
 525             c.error = SSL_R_BAD_LENGTH;
 526             c.line = __LINE__;
 527             goto err;
 528         } else {
 529             ret->sid_ctx_length = os.length;
 530             memcpy(ret->sid_ctx, os.data, os.length);
 531         }
 532         OPENSSL_free(os.data);
 533         os.data = NULL;
 534         os.length = 0;
 535     } else
 536         ret->sid_ctx_length = 0;
 537
 538     ai.length = 0;
 539     M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 5);
 540     if (ai.data != NULL) {
 541         ret->verify_result = ASN1_INTEGER_get(aip);
 542         OPENSSL_free(ai.data);
 543         ai.data = NULL;
 544         ai.length = 0;
 545     } else
 546         ret->verify_result = X509_V_OK;
 547
 548 #ifndef OPENSSL_NO_TLSEXT
 549     os.length = 0;
 550     os.data = NULL;
 551     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 6);
 552     if (os.data) {
 553         ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
 554         OPENSSL_free(os.data);
 555         os.data = NULL;
 556         os.length = 0;
 557     } else
 558         ret->tlsext_hostname = NULL;
 559 #endif                          /* OPENSSL_NO_TLSEXT */
 560
 561 #ifndef OPENSSL_NO_PSK
 562     os.length = 0;
 563     os.data = NULL;
 564     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 7);
 565     if (os.data) {
 566         ret->psk_identity_hint = BUF_strndup((char *)os.data, os.length);
 567         OPENSSL_free(os.data);
 568         os.data = NULL;
 569         os.length = 0;
 570     } else
 571         ret->psk_identity_hint = NULL;
 572
 573     os.length = 0;
 574     os.data = NULL;
 575     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 8);
 576     if (os.data) {
 577         ret->psk_identity = BUF_strndup((char *)os.data, os.length);
 578         OPENSSL_free(os.data);
 579         os.data = NULL;
 580         os.length = 0;
 581     } else
 582         ret->psk_identity = NULL;
 583 #endif                          /* OPENSSL_NO_PSK */
 584
 585 #ifndef OPENSSL_NO_TLSEXT
 586     ai.length = 0;
 587     M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 9);
 588     if (ai.data != NULL) {
 589         ret->tlsext_tick_lifetime_hint = ASN1_INTEGER_get(aip);
 590         OPENSSL_free(ai.data);
 591         ai.data = NULL;
 592         ai.length = 0;
 593     } else if (ret->tlsext_ticklen && ret->session_id_length)
 594         ret->tlsext_tick_lifetime_hint = -1;
 595     else
 596         ret->tlsext_tick_lifetime_hint = 0;
 597     os.length = 0;
 598     os.data = NULL;
 599     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 10);
 600     if (os.data) {
 601         ret->tlsext_tick = os.data;
 602         ret->tlsext_ticklen = os.length;
 603         os.data = NULL;
 604         os.length = 0;
 605     } else
 606         ret->tlsext_tick = NULL;
 607 #endif                          /* OPENSSL_NO_TLSEXT */
 608 #ifndef OPENSSL_NO_COMP
 609     os.length = 0;
 610     os.data = NULL;
 611     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 11);
 612     if (os.data) {
 613         ret->compress_meth = os.data[0];
 614         OPENSSL_free(os.data);
 615         os.data = NULL;
 616     }
 617 #endif
 618
 619 #ifndef OPENSSL_NO_SRP
 620     os.length = 0;
 621     os.data = NULL;
 622     M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 12);
 623     if (os.data) {
 624         ret->srp_username = BUF_strndup((char *)os.data, os.length);
 625         OPENSSL_free(os.data);
 626         os.data = NULL;
 627         os.length = 0;
 628     } else
 629         ret->srp_username = NULL;
 630 #endif                          /* OPENSSL_NO_SRP */
 631
 632     M_ASN1_D2I_Finish(a, SSL_SESSION_free, SSL_F_D2I_SSL_SESSION);
 633 }