How to use Phpass in Symfony

PhpassEncoder.php

<?php

namespace Acme\DemoBundle\Security\Service;

use Symfony\Component\Security\Core\Encoder\PasswordEncoderInterface;

use Hautelook\Phpass\PasswordHash;

/**
 * A password encoder that uses Phpass for encoding
 *
 * @author Baldur Rensch <brensch@gmail.com>
 */
class PhpassEncoder implements PasswordEncoderInterface
{
    public function encodePassword($raw, $salt)
    {
        $hasher = new PasswordHash(8, false);
        $hashedPassword = $hasher->hashPassword($raw);

        return $hashedPassword;
    }

    public function isPasswordValid($encoded, $raw, $salt)
    {
        $hasher = new PasswordHash(8, false);

        return $hasher->CheckPassword($raw, $encoded);
    }
}

security.yml

security:
    encoders:
        Acme\TestBundle\Security\User\AuthenticatedUser:
            id: acme.security.phpass_encoder

services.xml

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
    <services>
        <service id="acme.security.phpass_encoder" class="Acme\DemoBundle\Security\Service\PhpassEncoder" />
    </services>
</container>