Trying to get a Simple_preauth listener for symfony security working…

ApiKeyAuthenticatorServiceProvider.php

<?php
/**
 * ApiKeyAuthenticator for the Symfony Security Component
 */
namespace Ttf\Security\Provider;

use Silex\Application,
    Silex\ServiceProviderInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationException;

use Ttf\Mapping\User,
    Ttf\Security\ApiKeyAuthenticator,
    Ttf\Security\Provider\ApiKeyUserProvider;

class ApiKeyAuthenticationServiceProvider implements ServiceProviderInterface
{
    public function register(Application $app)
    {
        $app['apikey.authenticator'] = $app->protect(function () use ($app) {
            return new ApiKeyAuthenticator(new ApiKeyUserProvider($app['user.repository']));
        });

        $app['security.authentication_listener.factory.simple_preauth'] = $app->protect(function ($name, $options) use ($app) {

            if (!isset($app['security.authentication_provider.'.$name.'.dao'])) {
                $app['security.authentication_provider.'.$name.'.dao'] = $app['security.authentication_provider.dao._proto']($name);
            }

            $app['security.authentication_listener.' . $name . '.simple_preauth'] = $app->share(function () use ($app, $name, $options) {
                return new SimplePreAuthenticationListener(
                    $app['security'],
                    $app['security.authentication_manager'],
                    $name,
                    $options['authenticator'](),
                    $app['logger']
                );
            });

            return array(
                'security.authentication_provider.'.$name.'.dao',
                'security.authentication_listener.'.$name.'.simple_preauth',
                null,       // entrypoint
                'pre_auth'  // position of the listener in the stack
            );
        });

        return true;
    }

    public function boot(Application $app)
    {
    }

}