Implements symfony1 password encoding for Symfony2 security component

Symfony1GuardPasswordEncoder.php

<?php

namespace Security\Encoder;

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

/**
 * Implements symfony1 password encoding
 *
 * @see PluginsfGuardUser::checkPasswordByGuard()
 *
 * @author Jérôme TAMARELLE <jerome@tamarelle.net>
 */
class Symfony1GuardPasswordEncoder extends MessageDigestPasswordEncoder
{
    public function __construct()
    {
        parent::__construct('sha1', false, 1);
    }

    /**
     * {@inheritDoc}
     */
    protected function mergePasswordAndSalt($password, $salt)
    {
        return $salt . $password;
    }
}