Google Authenticator PHP class

Copyright (c) 2012, http://www.phpgangsta.de
Author: Michael Kliewe, @PHPGangsta
Licensed under the BSD License.

This PHP class can be used to interact with the Google Authenticator mobile app for 2-factor-authentication. This class can generate secrets, generate codes, validate codes and present a QR-Code for scanning the secret.

For a secure installation you have to make sure that used codes cannot be reused (replay-attack).

Usage:

See example files

php example1.php
Secret is: OQB6ZZGYHCPSX4AK

Google Charts URL for the QR-Code: https://www.google.com/chart?chs=200x200&chld=M|0&cht=qr&chl=otpauth://totp/infoATphpgangsta.de%3Fsecret%3DOQB6ZZGYHCPSX4AK

Checking Code '848634' and Secret 'OQB6ZZGYHCPSX4AK':
OK

Installation:

Use Composer to install the package
From project root directory execute following

composer install

Composer will take care of autoloading care of autoloading the library. Just include following at the top of your file

require_once __DIR__ . '/../vendor/autoload.php';

Run Tests:

All tests are inside tests folder.
Execute composer install and then run the tests from project root directory
Run as phpunit tests from the project root directory

ToDo:

??? What do you need?

Notes: