lib/krb5/fast.c

   1 /*
   2  * Copyright (c) 2011 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36
  37 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
  38 _krb5_fast_cf2(krb5_context context,
  39                krb5_keyblock *key1,
  40                const char *pepper1,
  41                krb5_keyblock *key2,
  42                const char *pepper2,
  43                krb5_keyblock *armorkey,
  44                krb5_crypto *armor_crypto)
  45 {
  46     krb5_crypto crypto1, crypto2;
  47     krb5_data pa1, pa2;
  48     krb5_error_code ret;
  49
  50     ret = krb5_crypto_init(context, key1, 0, &crypto1);
  51     if (ret)
  52         return ret;
  53
  54     ret = krb5_crypto_init(context, key2, 0, &crypto2);
  55     if (ret) {
  56         krb5_crypto_destroy(context, crypto1);
  57         return ret;
  58     }
  59
  60     pa1.data = rk_UNCONST(pepper1);
  61     pa1.length = strlen(pepper1);
  62     pa2.data = rk_UNCONST(pepper2);
  63     pa2.length = strlen(pepper2);
  64
  65     ret = krb5_crypto_fx_cf2(context, crypto1, crypto2, &pa1, &pa2,
  66                              key1->keytype, armorkey);
  67     krb5_crypto_destroy(context, crypto1);
  68     krb5_crypto_destroy(context, crypto2);
  69     if (ret)
  70         return ret;
  71
  72     if (armor_crypto) {
  73         ret = krb5_crypto_init(context, armorkey, 0, armor_crypto);
  74         if (ret)
  75             krb5_free_keyblock_contents(context, armorkey);
  76     }
  77
  78     return ret;
  79 }
  80
  81 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
  82 _krb5_fast_armor_key(krb5_context context,
  83                      krb5_keyblock *subkey,
  84                      krb5_keyblock *sessionkey,
  85                      krb5_keyblock *armorkey,
  86                      krb5_crypto *armor_crypto)
  87 {
  88     return _krb5_fast_cf2(context,
  89                           subkey,
  90                           "subkeyarmor",
  91                           sessionkey,
  92                           "ticketarmor",
  93                           armorkey,
  94                           armor_crypto);
  95 }