Line data    Source code

       1             : /*
       2             :  * Copyright (c) 1997 - 2008 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             : static krb5_error_code
      37        1182 : ARCFOUR_string_to_key(krb5_context context,
      38             :                       krb5_enctype enctype,
      39             :                       krb5_data password,
      40             :                       krb5_salt salt,
      41             :                       krb5_data opaque,
      42             :                       krb5_keyblock *key)
      43             : {
      44           6 :     krb5_error_code ret;
      45        1182 :     uint16_t *s = NULL;
      46        1182 :     size_t len = 0, i;
      47           6 :     EVP_MD_CTX *m;
      48             : 
      49        1182 :     m = EVP_MD_CTX_create();
      50        1182 :     if (m == NULL)
      51           0 :         return krb5_enomem(context);
      52             : 
      53        1182 :     EVP_DigestInit_ex(m, EVP_md4(), NULL);
      54             : 
      55        1182 :     ret = wind_utf8ucs2_length(password.data, &len);
      56        1182 :     if (ret) {
      57           0 :         krb5_set_error_message (context, ret,
      58           0 :                                 N_("Password is not valid UTF-8", ""));
      59           0 :         goto out;
      60             :     }
      61             : 
      62        1182 :     s = malloc (len * sizeof(s[0]));
      63        1182 :     if (len != 0 && s == NULL) {
      64           0 :         ret = krb5_enomem(context);
      65           0 :         goto out;
      66             :     }
      67             : 
      68        1182 :     ret = wind_utf8ucs2(password.data, s, &len);
      69        1182 :     if (ret) {
      70           0 :         krb5_set_error_message (context, ret,
      71           0 :                                 N_("Password is not valid UTF-8", ""));
      72           0 :         goto out;
      73             :     }
      74             : 
      75             :     /* LE encoding */
      76       30185 :     for (i = 0; i < len; i++) {
      77         476 :         unsigned char p;
      78       29003 :         p = (s[i] & 0xff);
      79       29003 :         EVP_DigestUpdate (m, &p, 1);
      80       29003 :         p = (s[i] >> 8) & 0xff;
      81       29003 :         EVP_DigestUpdate (m, &p, 1);
      82             :     }
      83             : 
      84        1182 :     key->keytype = enctype;
      85        1182 :     ret = krb5_data_alloc (&key->keyvalue, 16);
      86        1182 :     if (ret) {
      87           0 :         krb5_enomem(context);
      88           0 :         goto out;
      89             :     }
      90        1182 :     EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
      91             : 
      92        1182 :  out:
      93        1182 :     EVP_MD_CTX_destroy(m);
      94        1182 :     if (s)
      95        1176 :         memset (s, 0, len);
      96        1182 :     free (s);
      97        1182 :     return ret;
      98             : }
      99             : 
     100             : struct salt_type _krb5_arcfour_salt[] = {
     101             :     {
     102             :         KRB5_PW_SALT,
     103             :         "pw-salt",
     104             :         ARCFOUR_string_to_key
     105             :     },
     106             :     { 0, NULL, NULL }
     107             : };