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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Security\Core\Authentication\Provider;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Exception\BadCredentialsException;
use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Core\User\UserCheckerInterface;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Ldap\LdapInterface;
use Symfony\Component\Ldap\Exception\ConnectionException;
/**
* LdapBindAuthenticationProvider authenticates a user against an LDAP server.
*
* The only way to check user credentials is to try to connect the user with its
* credentials to the ldap.
*
* @author Charles Sarrazin <charles@sarraz.in>
*/
class LdapBindAuthenticationProvider extends UserAuthenticationProvider
{
private $userProvider;
private $ldap;
private $dnString;
/**
* Constructor.
*
* @param UserProviderInterface $userProvider A UserProvider
* @param UserCheckerInterface $userChecker A UserChecker
* @param string $providerKey The provider key
* @param LdapInterface $ldap A Ldap client
* @param string $dnString A string used to create the bind DN
* @param bool $hideUserNotFoundExceptions Whether to hide user not found exception or not
*/
public function __construct(UserProviderInterface $userProvider, UserCheckerInterface $userChecker, $providerKey, LdapInterface $ldap, $dnString = '{username}', $hideUserNotFoundExceptions = true)
{
parent::__construct($userChecker, $providerKey, $hideUserNotFoundExceptions);
$this->userProvider = $userProvider;
$this->ldap = $ldap;
$this->dnString = $dnString;
}
/**
* {@inheritdoc}
*/
protected function retrieveUser($username, UsernamePasswordToken $token)
{
if (AuthenticationProviderInterface::USERNAME_NONE_PROVIDED === $username) {
throw new UsernameNotFoundException('Username can not be null');
}
return $this->userProvider->loadUserByUsername($username);
}
/**
* {@inheritdoc}
*/
protected function checkAuthentication(UserInterface $user, UsernamePasswordToken $token)
{
$username = $token->getUsername();
$password = $token->getCredentials();
if ('' === $password) {
throw new BadCredentialsException('The presented password must not be empty.');
}
try {
$username = $this->ldap->escape($username, '', LdapInterface::ESCAPE_DN);
$dn = str_replace('{username}', $username, $this->dnString);
$this->ldap->bind($dn, $password);
} catch (ConnectionException $e) {
throw new BadCredentialsException('The presented password is invalid.');
}
}
}
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