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<?php
namespace Symfony\Component\Security\Authentication\Provider;
use Symfony\Component\Security\User\AccountInterface;
use Symfony\Component\Security\User\AccountCheckerInterface;
use Symfony\Component\Security\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Exception\AuthenticationException;
use Symfony\Component\Security\Exception\BadCredentialsException;
use Symfony\Component\Security\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Authentication\Token\TokenInterface;
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* UserProviderInterface retrieves users for UsernamePasswordToken tokens.
*
* @author Fabien Potencier <fabien.potencier@symfony-project.com>
*/
abstract class UserAuthenticationProvider implements AuthenticationProviderInterface
{
protected $hideUserNotFoundExceptions;
protected $accountChecker;
/**
* Constructor.
*
* @param AccountCheckerInterface $accountChecker An AccountCheckerInterface interface
* @param Boolean $hideUserNotFoundExceptions Whether to hide user not found exception or not
*/
public function __construct(AccountCheckerInterface $accountChecker, $hideUserNotFoundExceptions = true)
{
$this->accountChecker = $accountChecker;
$this->hideUserNotFoundExceptions = $hideUserNotFoundExceptions;
}
/**
* {@inheritdoc}
*/
public function authenticate(TokenInterface $token)
{
if (!$this->supports($token)) {
return null;
}
$username = null === $token->getUser() ? 'NONE_PROVIDED' : (string) $token;
try {
$user = $this->retrieveUser($username, $token);
} catch (UsernameNotFoundException $notFound) {
if ($this->hideUserNotFoundExceptions) {
throw new BadCredentialsException('Bad credentials', 0, $notFound);
}
throw $notFound;
}
if (null === $user) {
throw new \LogicException('The retrieveUser() methods returned null which should not be possible.');
}
try {
$this->accountChecker->checkPreAuth($user);
$this->checkAuthentication($user, $token);
} catch (AuthenticationException $e) {
throw $e;
}
$this->accountChecker->checkPostAuth($user);
return new UsernamePasswordToken($user, $token->getCredentials(), $user->getRoles());
}
/**
* {@inheritdoc}
*/
public function supports(TokenInterface $token)
{
return $token instanceof UsernamePasswordToken;
}
/**
* Retrieves the user from an implementation-specific location.
*
* @param string $username The username to retrieve
* @param UsernamePasswordToken $token The Token
*
* @return mixed The user
*
* @throws AuthenticationException if the credentials could not be validated
*/
abstract protected function retrieveUser($username, UsernamePasswordToken $token);
/**
* Does additional checks on the user and token (like validating the
* credentials).
*
* @param AccountInterface $account The retrieved AccountInterface instance
* @param UsernamePasswordToken $token The UsernamePasswordToken token to be authenticated
*
* @throws AuthenticationException if the credentials could not be validated
*/
abstract protected function checkAuthentication(AccountInterface $account, UsernamePasswordToken $token);
}
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