htdocs/javascript/secure_hash.js

   1 /***************************************************************************
   2  *  Copyright (C) 2003-2006 Polytechnique.org                              *
   3  *  http://opensource.polytechnique.org/                                   *
   4  *                                                                         *
   5  *  This program is free software; you can redistribute it and/or modify   *
   6  *  it under the terms of the GNU General Public License as published by   *
   7  *  the Free Software Foundation; either version 2 of the License, or      *
   8  *  (at your option) any later version.                                    *
   9  *                                                                         *
  10  *  This program is distributed in the hope that it will be useful,        *
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  13  *  GNU General Public License for more details.                           *
  14  *                                                                         *
  15  *  You should have received a copy of the GNU General Public License      *
  16  *  along with this program; if not, write to the Free Software            *
  17  *  Foundation, Inc.,                                                      *
  18  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  19  ***************************************************************************/
  20
  21 document.write('<script language="javascript" src="javascript/md5.js"></script>');
  22 document.write('<script language="javascript" src="javascript/sha1.js"></script>');
  23
  24 function hash_encrypt(a) {
  25     return hex_sha1(a);
  26 }
  27
  28 var hexa_h = "0123456789abcdef";
  29
  30 function dechex(a) {
  31     return hexa_h.charAt(a);
  32 }
  33
  34 function hexdec(a) {
  35     return hexa_h.indexOf(a);
  36 }
  37
  38 function hash_xor(a, b) {
  39     var c,i,j,k;
  40     c = "";
  41     i = a.length;
  42     j = b.length;
  43     if (i < j) {
  44         var d;
  45         d = a; a = b; b = d;
  46         k = i; i = j; j = k;
  47     }
  48     for (k = 0; k < j; k++)
  49         c += dechex(hexdec(a.charAt(k)) ^ hexdec(b.charAt(k)));
  50     for (; k < i; k++)
  51         c += a.charAt(k);
  52     return c;
  53 }