README

A simple wrapper of the PHP Mcrypt library for Silex

Usage

Register the service provider and specify your unique key.

$app->register(new Psamatt\Silex\Provider\McryptServiceProvider('unique_key', array(
        'cipher' => MCRYPT_RIJNDAEL_256, // optional
        'mode' => MCRYPT_MODE_CBC, // optional
        'iv_source' => MCRYPT_DEV_RANDOM, // optional
        'base64' => true|false, // optional. Default is true
        'auto_generate_iv' => true|false, // option. Default is false
    )));

Please note that you must explicitly generate the IV if you leave auto_generate_iv to false, you can do this by the following:

$app['mcrypt']->generateIv();

In your Silex application, you can use the Mcrypt provider with the following lines:

$data = 'my string';
$encryptedKey = $app['mcrypt']->encrypt($data);

print $app['mcrypt']->decrypt($encryptedKey); // prints 'my string'

If you'd like to use mcrypt in your Twig templates*, you can using either the mcrypt_encrypt or the mcrypt_decrypt filter:

{{ object.method | mcrypt_encrypt }} // encrypt
{{ object.method | mcrypt_decrypt }} // decrypt 

* ensure you define the McryptServiceProvider after your Twig Service Provider to utilise the Twig feature

Other useful information

If you require to decrypt a mcrypt encrypted string and are not using MCRYPT_MODE_ECB (recommended), you must initially get the IV before you've encrypted your string using $app['mcrypt']->getIv() and store this safely, then when you are ready to decrypt, you must set the same IV using $app['mcrypt']->setIv($my_iv), view the unit test for further clarification.

Mcrypt Documentation

For more information on what values to use for Mcrypt, view the documentation on each specific type:

• Cipher
• Mode
• IV Source

By default, the encrypted string will use base 64 encoding and decoding, to set this for your application, set the base64 option to true or false.