Where to encrypt/decrypt my data?

Question

I\'m using Symfony 2 with Doctrine 2.

I need to encrypt a field in my entity using an encryption service, and I\'m wondering where should I put this logic.

I\'m

Answer 1

To expand on richsage and targnation's great answers, one way to inject a dependency (e.g., cypto service) into a custom Doctrine mapping type, could be to use a static property and setter:

// MyBundle/Util/Crypto/Types/EncryptedString.php
class EncryptedString extends StringType
{
    /** @var \MyBundle\Util\Crypto */
    protected static $crypto;

    public static function setCrypto(Crypto $crypto)
    {
        static::$crypto = $crypto;
    }

    public function convertToDatabaseValue($value, AbstractPlatform $platform)
    {
        $value = parent::convertToDatabaseValue($value, $platform);
        return static::$crypto->encrypt($value);
    }

    public function convertToPHPValue($value, AbstractPlatform $platform)
    {
        $value = parent::convertToPHPValue($value, $platform);
        return static::$crypto->decrypt($value);
    }

    public function getName()
    {
        return 'encrypted_string';
    }
}

Configuration would look like this:

// MyBundle/MyBundle.php
class MyBundle extends Bundle
{
    public function boot()
    {
        /** @var \MyBundle\Util\Crypto $crypto */
        $crypto = $this->container->get('mybundle.util.crypto');
        EncryptedString::setCrypto($crypto);
    }
}

# app/Resources/config.yml
doctrine:
    dbal:
        types:
            encrypted_string: MyBundle\Util\Crypto\Types\EncryptedString

# MyBundle/Resources/config/services.yml
services:
    mybundle.util.crypto:
        class: MyBundle\Util\Crypto
        arguments: [ %key% ]