htdocs/javascript/secure_hash.js

   1 /***************************************************************************
   2  *  Copyright (C) 2003-2011 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 function hash_encrypt(a) {
  22     return hex_sha1(a);
  23 }
  24
  25 var hexa_h = "0123456789abcdef";
  26
  27 function dechex(a) {
  28     return hexa_h.charAt(a);
  29 }
  30
  31 function hexdec(a) {
  32     return hexa_h.indexOf(a);
  33 }
  34
  35 function hash_xor(a, b) {
  36     var c,i,j,k;
  37     c = "";
  38     i = a.length;
  39     j = b.length;
  40     if (i < j) {
  41         var d;
  42         d = a; a = b; b = d;
  43         k = i; i = j; j = k;
  44     }
  45     for (k = 0; k < j; k++)
  46         c += dechex(hexdec(a.charAt(k)) ^ hexdec(b.charAt(k)));
  47     for (; k < i; k++)
  48         c += a.charAt(k);
  49     return c;
  50 }
  51 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: