contrib/decrypt_headers.php

   1 <?php
   2
   3 /**
   4  * Script provides form to decode encrypted header information.
   5  *
   6  * @copyright &copy; 2005 The SquirrelMail Project Team
   7  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
   8  * @version $Id$
   9  * @package squirrelmail
  10  */
  11
  12 /**
  13  * Set constant to path of your SquirrelMail install.
  14  * @ignore
  15  */
  16 define('SM_PATH','../');
  17
  18 /**
  19  * include SquirrelMail string functions
  20  * script needs OneTimePadDecrypt() (functions/strings.php)
  21  * and sqgetGlobalVar() (functions/global.php, loaded by strings.php)
  22  */
  23 include_once(SM_PATH.'functions/strings.php');
  24
  25 /**
  26  * converts hex string to ip address
  27  * @param string $hex hexadecimal string created with squirrelmail ip2hex
  28  *  function in delivery class.
  29  * @return string ip address
  30  * @since 1.5.1 and 1.4.5
  31  */
  32 function hex2ip($hex) {
  33     if (strlen($hex)==8) {
  34         $ret=hexdec(substr($hex,0,2)).'.'
  35             .hexdec(substr($hex,2,2)).'.'
  36             .hexdec(substr($hex,4,2)).'.'
  37             .hexdec(substr($hex,6,2));
  38     } elseif (strlen($hex)==32) {
  39         $ret=hexdec(substr($hex,0,4)).':'
  40             .hexdec(substr($hex,4,4)).':'
  41             .hexdec(substr($hex,8,4)).':'
  42             .hexdec(substr($hex,12,4)).':'
  43             .hexdec(substr($hex,16,4)).':'
  44             .hexdec(substr($hex,20,4)).':'
  45             .hexdec(substr($hex,24,4)).':'
  46             .hexdec(substr($hex,28,4));
  47     } else {
  48         $ret=$hex;
  49     }
  50     return $ret;
  51 }
  52
  53 /** create page headers */
  54 header('Content-Type: text/html');
  55
  56 echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">'
  57     ."\n<head>\n<meta name=\"robots\" content=\"noindex,nofollow\">\n"
  58     ."</head><body>";
  59
  60 if (sqgetGlobalVar('submit',$submit,SQ_POST)) {
  61     if (! sqgetGlobalVar('secret',$secret,SQ_POST) ||
  62         empty($secret))
  63         echo "<p>You must enter encryption key.</p>\n";
  64     if (! sqgetGlobalVar('enc_string',$enc_string,SQ_POST) ||
  65         empty($enc_string))
  66         echo "<p>You must enter encrypted string.</p>\n";
  67
  68     if (isset($enc_string) && ! base64_decode($enc_string)) {
  69         echo "<p>Encrypted string should be BASE64 encoded.<br />\n"
  70             ."Please enter all characters that are listed after header name.</p>\n";
  71     } elseif (isset($secret)) {
  72         $string=OneTimePadDecrypt($enc_string,base64_encode($secret));
  73
  74         if (sqgetGlobalVar('ip_addr',$is_addr,SQ_POST)) {
  75             $string=hex2ip($string);
  76         }
  77         echo "<p>Decoded string: ".$string."</p>\n";
  78     }
  79     echo "<hr />";
  80 }
  81 ?>
  82 <form action="<?php echo $PHP_SELF ?>" method="post" >
  83 <p>
  84 Secret key: <input type="password" name="secret"><br />
  85 Encrypted string: <input type="text" name="enc_string"><br />
  86 Check, if it is an address string: <input type="checkbox" name="ip_addr" /><br />
  87 <button type="submit" name="submit" value="submit">Submit</button>
  88 </p>
  89 </form>
  90 </body></html>