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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\Ldap\Exception\ConnectionException;
use Symfony\Component\Ldap\LdapInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Exception\BadCredentialsException;
use Symfony\Component\Security\Core\Exception\LogicException;
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;
/**
* 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;
private $queryString;
private $searchDn;
private $searchPassword;
public function __construct(UserProviderInterface $userProvider, UserCheckerInterface $userChecker, string $providerKey, LdapInterface $ldap, string $dnString = '{username}', bool $hideUserNotFoundExceptions = true, string $searchDn = '', string $searchPassword = '')
{
parent::__construct($userChecker, $providerKey, $hideUserNotFoundExceptions);
$this->userProvider = $userProvider;
$this->ldap = $ldap;
$this->dnString = $dnString;
$this->searchDn = $searchDn;
$this->searchPassword = $searchPassword;
}
/**
* Set a query string to use in order to find a DN for the username.
*/
public function setQueryString(string $queryString)
{
$this->queryString = $queryString;
}
/**
* {@inheritdoc}
*/
protected function retrieveUser(string $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 ('' === (string) $password) {
throw new BadCredentialsException('The presented password must not be empty.');
}
try {
$username = $this->ldap->escape($username, '', LdapInterface::ESCAPE_DN);
if ($this->queryString) {
if ('' !== $this->searchDn && '' !== $this->searchPassword) {
$this->ldap->bind($this->searchDn, $this->searchPassword);
} else {
throw new LogicException('Using the "query_string" config without using a "search_dn" and a "search_password" is not supported.');
}
$query = str_replace('{username}', $username, $this->queryString);
$result = $this->ldap->query($this->dnString, $query)->execute();
if (1 !== $result->count()) {
throw new BadCredentialsException('The presented username is invalid.');
}
$dn = $result[0]->getDn();
} else {
$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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