contrib/decrypt_headers.php

   1 <?php
   2
   3 /**
   4  * Script provides form to decode encrypted header information.
   5  *
   6  * @copyright 2005-2010 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 and generic functions
  20  * script needs OneTimePadDecrypt() (functions/strings.php)
  21  * and sqgetGlobalVar() (functions/global.php)
  22  */
  23 include_once(SM_PATH.'functions/global.php');
  24 include_once(SM_PATH.'functions/strings.php');
  25
  26 /**
  27  * converts hex string to ip address
  28  * @param string $hex hexadecimal string created with squirrelmail ip2hex
  29  *  function in delivery class.
  30  * @return string ip address
  31  * @since 1.5.1 and 1.4.5
  32  */
  33 function hex2ip($hex) {
  34     if (strlen($hex)==8) {
  35         $ret=hexdec(substr($hex,0,2)).'.'
  36             .hexdec(substr($hex,2,2)).'.'
  37             .hexdec(substr($hex,4,2)).'.'
  38             .hexdec(substr($hex,6,2));
  39     } elseif (strlen($hex)==32) {
  40         $ret=substr($hex,0,4).':'
  41             .substr($hex,4,4).':'
  42             .substr($hex,8,4).':'
  43             .substr($hex,12,4).':'
  44             .substr($hex,16,4).':'
  45             .substr($hex,20,4).':'
  46             .substr($hex,24,4).':'
  47             .substr($hex,28,4);
  48     } else {
  49         $ret=$hex;
  50     }
  51     return $ret;
  52 }
  53
  54 /** create page headers */
  55 header('Content-Type: text/html');
  56
  57 echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"'."\n"
  58     .'  "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">'
  59     ."\n<head>\n<meta name=\"robots\" content=\"noindex,nofollow\">\n"
  60     ."</head><body>";
  61
  62 if (sqgetGlobalVar('submit',$submit,SQ_POST)) {
  63     $continue = TRUE;
  64     if (! sqgetGlobalVar('secret',$secret,SQ_POST) ||
  65         empty($secret)) {
  66         $continue = FALSE;
  67         echo "<p>You must enter an encryption key.</p>\n";
  68     }
  69     if (! sqgetGlobalVar('enc_string',$enc_string,SQ_POST) ||
  70         empty($enc_string)) {
  71         $continue = FALSE;
  72         echo "<p>You must enter an encrypted string.</p>\n";
  73     }
  74
  75     if ($continue) {
  76         if (isset($enc_string) && ! base64_decode($enc_string)) {
  77             echo "<p>Encrypted string should be BASE64 encoded.<br />\n"
  78                 ."Please enter all characters that are listed after header name.</p>\n";
  79         } elseif (isset($secret)) {
  80             $string=OneTimePadDecrypt($enc_string,base64_encode($secret));
  81
  82             if (sqgetGlobalVar('ip_addr',$is_addr,SQ_POST)) {
  83                 $string=hex2ip($string);
  84             }
  85             echo "<p>Decoded string: ".htmlspecialchars($string)."</p>\n";
  86         }
  87     }
  88     echo "<hr />";
  89 }
  90 ?>
  91 <form action="" method="post">
  92 <p>
  93 Secret key: <input type="password" name="secret"><br />
  94 Encrypted string: <input type="text" name="enc_string"><br />
  95 <label for="ip_addr">Check here if you are decoding an address string (FromHash/ProxyHash): </label><input type="checkbox" name="ip_addr" id="ip_addr" /><br />
  96 <button type="submit" name="submit" value="submit">Submit</button>
  97 </p>
  98 </form>
  99 </body></html>