Symfony Profiler

<?php
declare(strict_types=1);
/*
* This file is part of Contao.
*
* (c) Leo Feyer
*
* @license LGPL-3.0-or-later
*/
namespace Contao\CoreBundle\Security\Authentication\Token;
use Contao\BackendUser;
use Contao\FrontendUser;
use Doctrine\DBAL\Connection;
use Symfony\Bundle\SecurityBundle\Security\FirewallConfig;
use Symfony\Bundle\SecurityBundle\Security\FirewallMap;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolverInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
use Symfony\Component\Security\Http\FirewallMapInterface;
class TokenChecker
{
private const FRONTEND_FIREWALL = 'contao_frontend';
private const BACKEND_FIREWALL = 'contao_backend';
private RequestStack $requestStack;
private FirewallMapInterface $firewallMap;
private TokenStorageInterface $tokenStorage;
private SessionInterface $session;
private AuthenticationTrustResolverInterface $trustResolver;
private VoterInterface $roleVoter;
private Connection $connection;
private array $previewLinks;
/**
* @internal
*/
public function __construct(RequestStack $requestStack, FirewallMapInterface $firewallMap, TokenStorageInterface $tokenStorage, SessionInterface $session, AuthenticationTrustResolverInterface $trustResolver, VoterInterface $roleVoter, Connection $connection)
{
$this->requestStack = $requestStack;
$this->firewallMap = $firewallMap;
$this->tokenStorage = $tokenStorage;
$this->session = $session;
$this->trustResolver = $trustResolver;
$this->roleVoter = $roleVoter;
$this->connection = $connection;
}
/**
* Checks if a front end user is authenticated.
*/
public function hasFrontendUser(): bool
{
$token = $this->getToken(self::FRONTEND_FIREWALL);
return null !== $token && VoterInterface::ACCESS_GRANTED === $this->roleVoter->vote($token, null, ['ROLE_MEMBER']);
}
/**
* Checks if a back end user is authenticated.
*/
public function hasBackendUser(): bool
{
$token = $this->getToken(self::BACKEND_FIREWALL);
return null !== $token && VoterInterface::ACCESS_GRANTED === $this->roleVoter->vote($token, null, ['ROLE_USER']);
}
/**
* Gets the front end username from the session.
*/
public function getFrontendUsername(): ?string
{
$token = $this->getToken(self::FRONTEND_FIREWALL);
if (null === $token || !$token->getUser() instanceof FrontendUser) {
return null;
}
return $token->getUser()->getUserIdentifier();
}
/**
* Gets the back end username from the session.
*/
public function getBackendUsername(): ?string
{
$token = $this->getToken(self::BACKEND_FIREWALL);
if (null === $token || !$token->getUser() instanceof BackendUser) {
return null;
}
return $token->getUser()->getUserIdentifier();
}
/**
* Tells whether the front end preview can be accessed.
*/
public function canAccessPreview(): bool
{
if ($this->hasBackendUser()) {
return true;
}
$token = $this->getToken(self::FRONTEND_FIREWALL);
if (!$token instanceof FrontendPreviewToken) {
return false;
}
if (null === $token->getPreviewLinkId()) {
return false;
}
return $this->isValidPreviewLink($token);
}
/**
* Tells whether the front end preview can show unpublished fragments.
*/
public function isPreviewMode(): bool
{
$request = $this->requestStack->getMainRequest();
if (null === $request || !$request->attributes->get('_preview', false) || !$this->canAccessPreview()) {
return false;
}
$token = $this->getToken(self::FRONTEND_FIREWALL);
return $token instanceof FrontendPreviewToken && $token->showUnpublished();
}
public function isFrontendFirewall(): bool
{
return self::FRONTEND_FIREWALL === $this->getFirewallContext();
}
public function isBackendFirewall(): bool
{
return self::BACKEND_FIREWALL === $this->getFirewallContext();
}
private function getToken(string $context): ?TokenInterface
{
$token = $this->getTokenFromStorage($context);
if (null === $token) {
$token = $this->getTokenFromSession('_security_'.$context);
}
if (!$token instanceof TokenInterface || !$token->isAuthenticated()) {
return null;
}
if ($this->trustResolver->isAnonymous($token)) {
return null;
}
return $token;
}
private function getTokenFromStorage(string $context): ?TokenInterface
{
if ($this->getFirewallContext() !== $context) {
return null;
}
return $this->tokenStorage->getToken();
}
private function getFirewallContext(): ?string
{
$request = $this->requestStack->getMainRequest();
if (!$this->firewallMap instanceof FirewallMap || null === $request) {
return null;
}
$config = $this->firewallMap->getFirewallConfig($request);
if (!$config instanceof FirewallConfig) {
return null;
}
return $config->getContext();
}
private function getTokenFromSession(string $sessionKey): ?TokenInterface
{
if (!$this->session->isStarted()) {
$request = $this->requestStack->getMainRequest();
if (!$request || !$request->hasPreviousSession()) {
return null;
}
}
// This will start the session if Request::hasPreviousSession() was true
if (!$this->session->has($sessionKey)) {
return null;
}
$token = unserialize($this->session->get($sessionKey), ['allowed_classes' => true]);
if (!$token instanceof TokenInterface) {
return null;
}
return $token;
}
private function isValidPreviewLink(FrontendPreviewToken $token): bool
{
$id = $token->getPreviewLinkId();
if (!isset($this->previewLinks[$id])) {
$this->previewLinks[$id] = $this->connection->fetchAssociative(
"
SELECT
url,
showUnpublished,
restrictToUrl
FROM tl_preview_link
WHERE
id = :id
AND published = '1'
AND expiresAt > UNIX_TIMESTAMP()
",
['id' => $id],
);
}
$previewLink = $this->previewLinks[$id];
if (!$previewLink) {
return false;
}
if ((bool) $previewLink['showUnpublished'] !== $token->showUnpublished()) {
return false;
}
if (!$previewLink['restrictToUrl']) {
return true;
}
$request = $this->requestStack->getMainRequest();
return $request && strtok($request->getUri(), '?') === strtok(Request::create($previewLink['url'])->getUri(), '?');
}
}

vendor/contao/core-bundle/src/Security/Authentication/Token/TokenChecker.php line 209