// src/AppBundle/Security/Authentication/Token/WsseUserToken.php
namespace AppBundle\Security\Authentication\Token;

use Symfony\Component\Security\Core\Authentication\Token\AbstractToken;

class WsseUserToken extends AbstractToken
{
    public $created;
    public $digest;
    public $nonce;

    public function __construct(array $roles = array())
    {
        parent::__construct($roles);

        // If the user has roles, consider it authenticated
        $this->setAuthenticated(count($roles) > 0);
    }

    public function getCredentials()
    {
        return '';
    }
}

// src/AppBundle/Security/Firewall/WsseListener.php
namespace AppBundle\Security\Firewall;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationException;
use Symfony\Component\Security\Http\Firewall\ListenerInterface;
use AppBundle\Security\Authentication\Token\WsseUserToken;

class WsseListener implements ListenerInterface
{
    protected $tokenStorage;
    protected $authenticationManager;

    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager)
    {
        $this->tokenStorage = $tokenStorage;
        $this->authenticationManager = $authenticationManager;
    }

    public function handle(GetResponseEvent $event)
    {
        $request = $event->getRequest();

        $wsseRegex = '/UsernameToken Username="([^"]+)", PasswordDigest="([^"]+)", Nonce="([a-zA-Z0-9+\/]+={0,2})", Created="([^"]+)"/';
        if (!$request->headers->has('x-wsse') || 1 !== preg_match($wsseRegex, $request->headers->get('x-wsse'), $matches)) {
            return;
        }

        $token = new WsseUserToken();
        $token->setUser($matches[1]);

        $token->digest  = $matches[2];
        $token->nonce   = $matches[3];
        $token->created = $matches[4];

        try {
            $authToken = $this->authenticationManager->authenticate($token);
            $this->tokenStorage->setToken($authToken);

            return;
        } catch (AuthenticationException $failed) {
            // ... you might log something here

            // To deny the authentication clear the token. This will redirect to the login page.
            // Make sure to only clear your token, not those of other authentication listeners.
            // $token = $this->tokenStorage->getToken();
            // if ($token instanceof WsseUserToken && $this->providerKey === $token->getProviderKey()) {
            //     $this->tokenStorage->setToken(null);
            // }
            // return;
        }

        // By default deny authorization
        $response = new Response();
        $response->setStatusCode(Response::HTTP_FORBIDDEN);
        $event->setResponse($response);
    }
}

// src/AppBundle/Security/Authentication/Provider/WsseProvider.php
namespace AppBundle\Security\Authentication\Provider;

use Psr\Cache\CacheItemPoolInterface;
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\Exception\NonceExpiredException;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use AppBundle\Security\Authentication\Token\WsseUserToken;

class WsseProvider implements AuthenticationProviderInterface
{
    private $userProvider;
    private $cachePool;

    public function __construct(UserProviderInterface $userProvider, CacheItemPoolInterface $cachePool)
    {
        $this->userProvider = $userProvider;
        $this->cachePool = $cachePool;
    }

    public function authenticate(TokenInterface $token)
    {
        $user = $this->userProvider->loadUserByUsername($token->getUsername());

        if ($user && $this->validateDigest($token->digest, $token->nonce, $token->created, $user->getPassword())) {
            $authenticatedToken = new WsseUserToken($user->getRoles());
            $authenticatedToken->setUser($user);

            return $authenticatedToken;
        }

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

    /**
     * This function is specific to Wsse authentication and is only used to help this example
     *
     * For more information specific to the logic here, see
     * https://github.com/symfony/symfony-docs/pull/3134#issuecomment-27699129
     */
    protected function validateDigest($digest, $nonce, $created, $secret)
    {
        // Check created time is not in the future
        if (strtotime($created) > time()) {
            return false;
        }

        // Expire timestamp after 5 minutes
        if (time() - strtotime($created) > 300) {
            return false;
        }

        // Try to fetch the cache item from pool
        $cacheItem = $this->cachePool->getItem(md5($nonce));

        // Validate that the nonce is *not* in cache
        // if it is, this could be a replay attack
        if ($cacheItem->isHit()) {
            throw new NonceExpiredException('Previously used nonce detected');
        }

        // Store the item in cache for 5 minutes
        $cacheItem->set(null)->expiresAfter(300);
        $this->cachePool->save($cacheItem);

        // Validate Secret
        $expected = base64_encode(sha1(base64_decode($nonce).$created.$secret, true));

        return hash_equals($expected, $digest);
    }

    public function supports(TokenInterface $token)
    {
        return $token instanceof WsseUserToken;
    }
}

// src/AppBundle/AppBundle.php
namespace AppBundle;

use AppBundle\DependencyInjection\Security\Factory\WsseFactory;
use Symfony\Component\HttpKernel\Bundle\Bundle;
use Symfony\Component\DependencyInjection\ContainerBuilder;

class AppBundle extends Bundle
{
    public function build(ContainerBuilder $container)
    {
        parent::build($container);

        $extension = $container->getExtension('security');
        $extension->addSecurityListenerFactory(new WsseFactory());
    }
}