From e85cb7fe2a3fb5e3b0026159939d433501dc97bc Mon Sep 17 00:00:00 2001
From: adenkejawen <muhamad@sanisphere.com>
Date: Fri, 18 Jul 2014 10:15:01 +0700
Subject: [PATCH] added the possibility to return null from
 SimplePreAuthenticationListener

---
 .../Http/Firewall/SimplePreAuthenticationListener.php    | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
index 258ca96d6d..47996b2d95 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
@@ -21,6 +21,7 @@ use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Http\Authentication\AuthenticationFailureHandlerInterface;
 use Symfony\Component\Security\Http\Authentication\AuthenticationSuccessHandlerInterface;
+use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 
 /**
  * SimplePreAuthenticationListener implements simple proxying to an authenticator.
@@ -75,9 +76,13 @@ class SimplePreAuthenticationListener implements ListenerInterface
         }
 
         try {
+            $this->securityContext->setToken(null);
             $token = $this->simpleAuthenticator->createToken($request, $this->providerKey);
-            $token = $this->authenticationManager->authenticate($token);
-            $this->securityContext->setToken($token);
+
+            if ($token instanceof TokenInterface) {
+                $token = $this->authenticationManager->authenticate($token);
+                $this->securityContext->setToken($token);
+            }
         } catch (AuthenticationException $e) {
             $this->securityContext->setToken(null);