Decodifica HEX -> Blowfish -> Plain Text

blowfish_hex_test.php

<?php
/** 
 * Decodifica HEX -> Blowfish -> Plain Text
 * @license http://creativecommons.org/publicdomain/zero/1.0/
 */

/**
 * pear install Crypt_Blowfish
 * @link http://pear.php.net/package/Crypt_Blowfish/
 */
include('Crypt/Blowfish.php');

/* dati di prova */
$msisdn = "df23e3983f66459470ae5b733c898c95";
$sender = "0000000000";
$shared_key = "abcdefghjk";

/* decodifica hex->blowfish */
$decoded = preg_replace("'([\S,\d]{2})'e", "chr(hexdec('\\1'))", $msisdn);

/* eventuale codifica blowfish->hex di controllo */
#$encoded = preg_replace( "'(.)'e", "dechex(ord('\\1'))", $sender);

/** 
 * decodifica blowfish->dati
 * richiede un doppio type casting per problemi di lunghezza/codifica con $result
 */
$bf = new Crypt_Blowfish( $shared_key );
$result = (int) $bf->decrypt( $decoded );
$real_sender = (string) $result;
var_dump($real_sender);

?>

Appunti per eventuale variante JavaScript:

• http://phpjs.org/functions/hexdec:423
• http://phpjs.org/functions/dechex:382
• http://phpjs.org/functions/ord:483
• https://github.com/p120ph37/blowfish.js