crypto/external/bsd/heimdal/dist/lib/krb5/salt-arcfour.c

   1 /*      $NetBSD: salt-arcfour.c,v 1.1.1.2 2014/04/24 12:45:51 pettai Exp $      */
   2
   3 /*
   4  * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "krb5_locl.h"
  37
  38 static krb5_error_code
  39 ARCFOUR_string_to_key(krb5_context context,
  40                       krb5_enctype enctype,
  41                       krb5_data password,
  42                       krb5_salt salt,
  43                       krb5_data opaque,
  44                       krb5_keyblock *key)
  45 {
  46     krb5_error_code ret;
  47     uint16_t *s = NULL;
  48     size_t len = 0, i;
  49     EVP_MD_CTX *m;
  50
  51     m = EVP_MD_CTX_create();
  52     if (m == NULL) {
  53         ret = ENOMEM;
  54         krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
  55         goto out;
  56     }
  57
  58     EVP_DigestInit_ex(m, EVP_md4(), NULL);
  59
  60     ret = wind_utf8ucs2_length(password.data, &len);
  61     if (ret) {
  62         krb5_set_error_message (context, ret,
  63                                 N_("Password not an UCS2 string", ""));
  64         goto out;
  65     }
  66
  67     s = malloc (len * sizeof(s[0]));
  68     if (len != 0 && s == NULL) {
  69         krb5_set_error_message (context, ENOMEM,
  70                                 N_("malloc: out of memory", ""));
  71         ret = ENOMEM;
  72         goto out;
  73     }
  74
  75     ret = wind_utf8ucs2(password.data, s, &len);
  76     if (ret) {
  77         krb5_set_error_message (context, ret,
  78                                 N_("Password not an UCS2 string", ""));
  79         goto out;
  80     }
  81
  82     /* LE encoding */
  83     for (i = 0; i < len; i++) {
  84         unsigned char p;
  85         p = (s[i] & 0xff);
  86         EVP_DigestUpdate (m, &p, 1);
  87         p = (s[i] >> 8) & 0xff;
  88         EVP_DigestUpdate (m, &p, 1);
  89     }
  90
  91     key->keytype = enctype;
  92     ret = krb5_data_alloc (&key->keyvalue, 16);
  93     if (ret) {
  94         krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
  95         goto out;
  96     }
  97     EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
  98
  99  out:
 100     EVP_MD_CTX_destroy(m);
 101     if (s)
 102         memset (s, 0, len);
 103     free (s);
 104     return ret;
 105 }
 106
 107 struct salt_type _krb5_arcfour_salt[] = {
 108     {
 109         KRB5_PW_SALT,
 110         "pw-salt",
 111         ARCFOUR_string_to_key
 112     },
 113     { 0 }
 114 };