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decrypt.sh
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decrypt.sh
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#!/usr/bin/env php
<?php
/*
+-----------------------------------------------------------------------+
| bin/decrypt.sh |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2009, The Roundcube Dev Team |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Decrypt the encrypted parts of the HTTP Received: headers |
| |
+-----------------------------------------------------------------------+
| Author: Tomas Tevesz <ice@extreme.hu> |
+-----------------------------------------------------------------------+
$Id$
*/
/*-
* If http_received_header_encrypt is configured, the IP address and the
* host name of the added Received: header is encrypted with 3DES, to
* protect information that some could consider sensitve, yet their
* availability is a must in some circumstances.
*
* Such an encrypted Received: header might look like:
*
* Received: from DzgkvJBO5+bw+oje5JACeNIa/uSI4mRw2cy5YoPBba73eyBmjtyHnQ==
* [my0nUbjZXKtl7KVBZcsvWOxxtyVFxza4]
* with HTTP/1.1 (POST); Thu, 14 May 2009 19:17:28 +0200
*
* In this example, the two encrypted components are the sender host name
* (DzgkvJBO5+bw+oje5JACeNIa/uSI4mRw2cy5YoPBba73eyBmjtyHnQ==) and the IP
* address (my0nUbjZXKtl7KVBZcsvWOxxtyVFxza4).
*
* Using this tool, they can be decrypted into plain text:
*
* $ bin/decrypt.sh 'my0nUbjZXKtl7KVBZcsvWOxxtyVFxza4' \
* > 'DzgkvJBO5+bw+oje5JACeNIa/uSI4mRw2cy5YoPBba73eyBmjtyHnQ=='
* 84.3.187.208
* 5403BBD0.catv.pool.telekom.hu
* $
*
* Thus it is known that this particular message was sent by 84.3.187.208,
* having, at the time of sending, the name of 5403BBD0.catv.pool.telekom.hu.
*
* If (most likely binary) junk is shown, then
* - either the encryption password has, between the time the mail was sent
* and `now', changed, or
* - you are dealing with counterfeit header data.
*/
define('INSTALL_PATH', realpath(dirname(__FILE__).'/..') . '/');
require INSTALL_PATH . 'program/include/clisetup.php';
if ($argc < 2) {
die("Usage: " . basename($argv[0]) . " encrypted-hdr-part [encrypted-hdr-part ...]\n");
}
$RCMAIL = rcmail::get_instance();
for ($i = 1; $i < $argc; $i++) {
printf("%s\n", $RCMAIL->decrypt($argv[$i]));
};

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