Format-preserving encryption
License: MIT License
A pure PHP implementation of Format-preserving, Feistel-based encryption (FFX).
Ported from emulbreh/pyffx.
$key = 'hello';
$alphabet = 'abcdefghijklmnopqrstuvwxyz';
$ffx = new \Katoni\FFX\Codecs\Text($key, $alphabet, 10);
$ffx->encrypt('encryption'); // string: jrsunxgmbq
$ffx = new \Katoni\FFX\Codecs\Integer($key, 4);
$ffx->encrypt('1234'); // int: 1867
Hi, firstly thanks for porting this. Not sure if you are still updating?
On PHP 8.1, there is a deprecation warning
Deprecated: Implicit conversion from float 2.5 to int loses precision in vendor\katoni\php-ffx\src\FFX.php on line 68
Deprecated: Implicit conversion from float 2.5 to int loses precision in vendor\katoni\php-ffx\src\FFX.php on line 69
It seems to be caused by the casting wasn't properly enclosed in brackets on line 65. Changing it to the following fixes the problem:
$s = (int) (count($v) / 2);
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