[Security] Fixed problem with losing ROLE_PREVIOUS_ADMIN role.

src/Symfony/Component/Security/Core/Authentication/Provider/UserAuthenticationProvider.php

@@ -19,6 +19,7 @@
 use Symfony\Component\Security\Core\Exception\AuthenticationServiceException;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Role\SwitchUserRole;
 
 /**
  * UserProviderInterface retrieves users for UsernamePasswordToken tokens.
@@ -92,7 +93,7 @@ public function authenticate(TokenInterface $token)
             throw $e;
         }
 
-        $authenticatedToken = new UsernamePasswordToken($user, $token->getCredentials(), $this->providerKey, $user->getRoles());
+        $authenticatedToken = new UsernamePasswordToken($user, $token->getCredentials(), $this->providerKey, $this->getRoles($user, $token));
         $authenticatedToken->setAttributes($token->getAttributes());
 
         return $authenticatedToken;
@@ -106,6 +107,29 @@ public function supports(TokenInterface $token)
         return $token instanceof UsernamePasswordToken && $this->providerKey === $token->getProviderKey();
     }
 
+    /**
+     * Retrieves roles from user and appends SwitchUserRole if original token contained one.
+     *
+     * @param UserInterface  $user  The user
+     * @param TokenInterface $token The token
+     *
+     * @return Role[] The user roles
+     */
+    private function getRoles(UserInterface $user, TokenInterface $token)
+    {
+        $roles = $user->getRoles();
+
+        foreach ($token->getRoles() as $role) {
+            if ($role instanceof SwitchUserRole) {
+                $roles[] = $role;
+
+                break;
+            }
+        }
+
+        return $roles;
+    }
+
     /**
      * Retrieves the user from an implementation-specific location.
      *

src/Symfony/Component/Security/Tests/Core/Authentication/Provider/UserAuthenticationProviderTest.php

@@ -13,6 +13,7 @@
 
 use Symfony\Component\Security\Core\Authentication\Provider\UserAuthenticationProvider;
 use Symfony\Component\Security\Core\Role\Role;
+use Symfony\Component\Security\Core\Role\SwitchUserRole;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 
 class UserAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
@@ -172,6 +173,11 @@ public function testAuthenticate()
               ->will($this->returnValue('foo'))
         ;
 
+        $token->expects($this->once())
+              ->method('getRoles')
+              ->will($this->returnValue(array()))
+        ;
+
         $authToken = $provider->authenticate($token);
 
         $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', $authToken);
@@ -181,9 +187,45 @@ public function testAuthenticate()
         $this->assertEquals(array('foo' => 'bar'), $authToken->getAttributes(), '->authenticate() copies token attributes');
     }
 
+    public function testAuthenticateWithPreservingRoleSwitchUserRole()
+    {
+        $user = $this->getMock('Symfony\Component\Security\Core\User\UserInterface');
+        $user->expects($this->once())
+             ->method('getRoles')
+             ->will($this->returnValue(array('ROLE_FOO')))
+        ;
+
+        $provider = $this->getProvider();
+        $provider->expects($this->once())
+                 ->method('retrieveUser')
+                 ->will($this->returnValue($user))
+        ;
+
+        $token = $this->getSupportedToken();
+        $token->expects($this->once())
+              ->method('getCredentials')
+              ->will($this->returnValue('foo'))
+        ;
+
+        $switchUserRole = new SwitchUserRole('foo', $this->getMock('Symfony\Component\Security\Core\Authentication\Token\TokenInterface'));
+        $token->expects($this->once())
+              ->method('getRoles')
+              ->will($this->returnValue(array($switchUserRole)))
+        ;
+
+        $authToken = $provider->authenticate($token);
+
+        $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', $authToken);
+        $this->assertSame($user, $authToken->getUser());
+        $this->assertContains(new Role('ROLE_FOO'), $authToken->getRoles(), '', false, false);
+        $this->assertContains($switchUserRole, $authToken->getRoles());
+        $this->assertEquals('foo', $authToken->getCredentials());
+        $this->assertEquals(array('foo' => 'bar'), $authToken->getAttributes(), '->authenticate() copies token attributes');
+    }
+
     protected function getSupportedToken()
     {
-        $mock = $this->getMock('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', array('getCredentials', 'getProviderKey'), array(), '', false);
+        $mock = $this->getMock('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', array('getCredentials', 'getProviderKey', 'getRoles'), array(), '', false);
         $mock
             ->expects($this->any())
             ->method('getProviderKey')