diff --git a/src/Symfony/Component/Security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php b/src/Symfony/Component/Security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php
index 9c07fd5a35697..aa2c4803f1a68 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php
@@ -84,7 +84,7 @@ protected function checkAuthentication(UserInterface $user, UsernamePasswordToke
$username = $token->getUsername();
$password = $token->getCredentials();
- if ('' === $password) {
+ if ('' === (string) $password) {
throw new BadCredentialsException('The presented password must not be empty.');
}
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
index d65e8e7cc52e4..19f92528060bd 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
@@ -45,6 +45,23 @@ public function testEmptyPasswordShouldThrowAnException()
$reflection->invoke($provider, new User('foo', null), new UsernamePasswordToken('foo', '', 'key'));
}
+ /**
+ * @expectedException \Symfony\Component\Security\Core\Exception\BadCredentialsException
+ * @expectedExceptionMessage The presented password must not be empty.
+ */
+ public function testNullPasswordShouldThrowAnException()
+ {
+ $userProvider = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserProviderInterface')->getMock();
+ $ldap = $this->getMockBuilder('Symfony\Component\Ldap\LdapClientInterface')->getMock();
+ $userChecker = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserCheckerInterface')->getMock();
+
+ $provider = new LdapBindAuthenticationProvider($userProvider, $userChecker, 'key', $ldap);
+ $reflection = new \ReflectionMethod($provider, 'checkAuthentication');
+ $reflection->setAccessible(true);
+
+ $reflection->invoke($provider, new User('foo', null), new UsernamePasswordToken('foo', null, 'key'));
+ }
+
/**
* @expectedException \Symfony\Component\Security\Core\Exception\BadCredentialsException
* @expectedExceptionMessage The presented password is invalid.
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