Fixed issue with blank password with Ldap
The bind operation of LDAP, as described in RFC 4513, provides a method which allows for authentication of users. For the Simple Authentication Method a user may use the anonymous authentication mechanism, the unauthenticated authentication mechanism, or the name/password authentication mechanism. The unauthenticated authentication mechanism is used when a client who desires to establish an anonymous authorization state passes a non-zero length distinguished name and a zero length password. Most LDAP servers either can be configured to allow this mechanism or allow it by default. _Web-based applications which perform the simple bind operation with the client's credentials are at risk when an anonymous authorization state is established. This can occur when the web-based application passes a distinguished name and a zero length password to the LDAP server._ Thus, misconfiguring a server with simple bind can trick Symfony into thinking the username/password tuple as valid, potentially leading to unauthorized access.
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@ -73,6 +73,10 @@ class LdapBindAuthenticationProvider extends UserAuthenticationProvider
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$username = $token->getUsername();
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$password = $token->getCredentials();
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if ('' === $password) {
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throw new BadCredentialsException('The presented password must not be empty.');
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}
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try {
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$username = $this->ldap->escape($username, '', LDAP_ESCAPE_DN);
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$dn = str_replace('{username}', $username, $this->dnString);
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@ -21,6 +21,23 @@ use Symfony\Component\Ldap\Exception\ConnectionException;
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*/
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class LdapBindAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
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{
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/**
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* @expectedException \Symfony\Component\Security\Core\Exception\BadCredentialsException
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* @expectedExceptionMessage The presented password must not be empty.
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*/
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public function testEmptyPasswordShouldThrowAnException()
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{
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$userProvider = $this->getMock('Symfony\Component\Security\Core\User\UserProviderInterface');
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$ldap = $this->getMock('Symfony\Component\Ldap\LdapClientInterface');
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$userChecker = $this->getMock('Symfony\Component\Security\Core\User\UserCheckerInterface');
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$provider = new LdapBindAuthenticationProvider($userProvider, $userChecker, 'key', $ldap);
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$reflection = new \ReflectionMethod($provider, 'checkAuthentication');
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$reflection->setAccessible(true);
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$reflection->invoke($provider, new User('foo', null), new UsernamePasswordToken('foo', '', 'key'));
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}
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/**
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* @expectedException \Symfony\Component\Security\Core\Exception\BadCredentialsException
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* @expectedExceptionMessage The presented password is invalid.
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@ -40,7 +57,7 @@ class LdapBindAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
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$reflection = new \ReflectionMethod($provider, 'checkAuthentication');
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$reflection->setAccessible(true);
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$reflection->invoke($provider, new User('foo', null), new UsernamePasswordToken('foo', '', 'key'));
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$reflection->invoke($provider, new User('foo', null), new UsernamePasswordToken('foo', 'bar', 'key'));
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}
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public function testRetrieveUser()
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