Home » Encryption » Crypt_Blowfish » Bug #8649

[2006-09-07 09:25 UTC] sven at teamspeak-systems dot de

Description:
------------
Hi there!

Before I begin, here's some information about my system:

PHP Versions: 5.1.1 (ZDE Debugger), 5.1.4
PHP Configure Command: cscript /nologo configure.js "--enable-snapshot-build" "--with-gd=shared"
Server API: Apache 2.0 Handler
PEAR package: 1.4.11

I've just tried to create a small script with the Crypt_Blowfish package. The problem is, that there will always appear various NUL characters at the end of the decrypted string. I've replaced these characters with "[NUL]" in the result below.

Is there a known bug or am I making a mistake? Thanks in advance!

Regards
Sven

Test script:
---------------
<?php

header('Content-Type: text/plain');

require_once('./includes/Blowfish.php');

$crypt = new Crypt_Blowfish('testing');

$string = 'Hello World!';
$encrypted = $crypt->encrypt($string);
$decrypted = $crypt->decrypt($encrypted);

echo 'Original: ' . $string . ' -> Length: ' . strlen($string) . '\n';
echo 'Encrypted: ' . $encrypted . ' -> Length: ' . strlen($encrypted) . '\n';
echo 'Decrypted: ' . $decrypted . ' -> Length: ' . strlen($decrypted) . '\n';

?>

Expected result:
----------------
X-Powered-By: PHP/5.1.1
Content-Type: text/plain

Original: Hello World! -> Length: 12
Encrypted: 2E°{[NUL]3[NUL]nÀ<‡´[NUL]*n$ -> Length: 16
Decrypted: Hello World! -> Length: 12

Actual result:
--------------
X-Powered-By: PHP/5.1.1
Content-Type: text/plain

Original: Hello World! -> Length: 12
Encrypted: 2E°{[NUL]3[NUL]nÀ<‡´[NUL]*n$ -> Length: 16
Decrypted: Hello World![NUL][NUL][NUL][NUL] -> Length: 16