AuthBundle/Security/Authentication/Provider/OAuthProxyProvider.php

<?php

namespace AuthBundle\Security\Authentication\Provider;

use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationException;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;

class OAuthProxyProvider implements AuthenticationProviderInterface
{

    /**
     * @var UserProviderInterface 
     */
    private $userProvider;


    /**
     * @param UserProviderInterface $userProvider
     */
    public function __construct(UserProviderInterface $userProvider)
    {
        $this->userProvider = $userProvider;
    }

    /**
     * @param TokenInterface $token
     * 
     * @return OAuthToken
     * 
     * @throws AuthenticationException
     */
    public function authenticate(TokenInterface $token)
    {
        $user = $token->getUser();   
        if ($user) {
            $authenticatedToken = new UsernamePasswordToken($user, null, "api", $user->getRoles());
            $authenticatedToken->setUser($user);
            
            return $authenticatedToken;
        }

        throw new AuthenticationException('The OAuth authentication failed.');
    }

    /**
     * @param TokenInterface $token
     * 
     * @return boolean
     */
    public function supports(TokenInterface $token)
    {
        return $token instanceof UsernamePasswordToken;
    }

}