142 lines
5.1 KiB
PHP
142 lines
5.1 KiB
PHP
<?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\Csrf;
|
|
|
|
use Symfony\Component\HttpFoundation\RequestStack;
|
|
use Symfony\Component\Security\Core\Exception\InvalidArgumentException;
|
|
use Symfony\Component\Security\Csrf\TokenGenerator\TokenGeneratorInterface;
|
|
use Symfony\Component\Security\Csrf\TokenGenerator\UriSafeTokenGenerator;
|
|
use Symfony\Component\Security\Csrf\TokenStorage\NativeSessionTokenStorage;
|
|
use Symfony\Component\Security\Csrf\TokenStorage\TokenStorageInterface;
|
|
|
|
/**
|
|
* Default implementation of {@link CsrfTokenManagerInterface}.
|
|
*
|
|
* @author Bernhard Schussek <bschussek@gmail.com>
|
|
* @author Kévin Dunglas <dunglas@gmail.com>
|
|
*/
|
|
class CsrfTokenManager implements CsrfTokenManagerInterface
|
|
{
|
|
private TokenGeneratorInterface $generator;
|
|
private TokenStorageInterface $storage;
|
|
private \Closure|string $namespace;
|
|
|
|
/**
|
|
* @param $namespace
|
|
* * null: generates a namespace using $_SERVER['HTTPS']
|
|
* * string: uses the given string
|
|
* * RequestStack: generates a namespace using the current main request
|
|
* * callable: uses the result of this callable (must return a string)
|
|
*/
|
|
public function __construct(?TokenGeneratorInterface $generator = null, ?TokenStorageInterface $storage = null, string|RequestStack|callable|null $namespace = null)
|
|
{
|
|
$this->generator = $generator ?? new UriSafeTokenGenerator();
|
|
$this->storage = $storage ?? new NativeSessionTokenStorage();
|
|
|
|
$superGlobalNamespaceGenerator = fn () => !empty($_SERVER['HTTPS']) && 'off' !== strtolower($_SERVER['HTTPS']) ? 'https-' : '';
|
|
|
|
if (null === $namespace) {
|
|
$this->namespace = $superGlobalNamespaceGenerator;
|
|
} elseif ($namespace instanceof RequestStack) {
|
|
$this->namespace = function () use ($namespace, $superGlobalNamespaceGenerator) {
|
|
if ($request = $namespace->getMainRequest()) {
|
|
return $request->isSecure() ? 'https-' : '';
|
|
}
|
|
|
|
return $superGlobalNamespaceGenerator();
|
|
};
|
|
} elseif ($namespace instanceof \Closure || \is_string($namespace)) {
|
|
$this->namespace = $namespace;
|
|
} elseif (\is_callable($namespace)) {
|
|
$this->namespace = $namespace(...);
|
|
} else {
|
|
throw new InvalidArgumentException(sprintf('$namespace must be a string, a callable returning a string, null or an instance of "RequestStack". "%s" given.', get_debug_type($namespace)));
|
|
}
|
|
}
|
|
|
|
public function getToken(string $tokenId): CsrfToken
|
|
{
|
|
$namespacedId = $this->getNamespace().$tokenId;
|
|
if ($this->storage->hasToken($namespacedId)) {
|
|
$value = $this->storage->getToken($namespacedId);
|
|
} else {
|
|
$value = $this->generator->generateToken();
|
|
|
|
$this->storage->setToken($namespacedId, $value);
|
|
}
|
|
|
|
return new CsrfToken($tokenId, $this->randomize($value));
|
|
}
|
|
|
|
public function refreshToken(string $tokenId): CsrfToken
|
|
{
|
|
$namespacedId = $this->getNamespace().$tokenId;
|
|
$value = $this->generator->generateToken();
|
|
|
|
$this->storage->setToken($namespacedId, $value);
|
|
|
|
return new CsrfToken($tokenId, $this->randomize($value));
|
|
}
|
|
|
|
public function removeToken(string $tokenId): ?string
|
|
{
|
|
return $this->storage->removeToken($this->getNamespace().$tokenId);
|
|
}
|
|
|
|
public function isTokenValid(CsrfToken $token): bool
|
|
{
|
|
$namespacedId = $this->getNamespace().$token->getId();
|
|
if (!$this->storage->hasToken($namespacedId)) {
|
|
return false;
|
|
}
|
|
|
|
return hash_equals($this->storage->getToken($namespacedId), $this->derandomize($token->getValue()));
|
|
}
|
|
|
|
private function getNamespace(): string
|
|
{
|
|
return \is_callable($ns = $this->namespace) ? $ns() : $ns;
|
|
}
|
|
|
|
private function randomize(string $value): string
|
|
{
|
|
$key = random_bytes(32);
|
|
$value = $this->xor($value, $key);
|
|
|
|
return sprintf('%s.%s.%s', substr(hash('xxh128', $key), 0, 1 + (\ord($key[0]) % 32)), rtrim(strtr(base64_encode($key), '+/', '-_'), '='), rtrim(strtr(base64_encode($value), '+/', '-_'), '='));
|
|
}
|
|
|
|
private function derandomize(string $value): string
|
|
{
|
|
$parts = explode('.', $value);
|
|
if (3 !== \count($parts)) {
|
|
return $value;
|
|
}
|
|
$key = base64_decode(strtr($parts[1], '-_', '+/'));
|
|
if ('' === $key || false === $key) {
|
|
return $value;
|
|
}
|
|
$value = base64_decode(strtr($parts[2], '-_', '+/'));
|
|
|
|
return $this->xor($value, $key);
|
|
}
|
|
|
|
private function xor(string $value, string $key): string
|
|
{
|
|
if (\strlen($value) > \strlen($key)) {
|
|
$key = str_repeat($key, ceil(\strlen($value) / \strlen($key)));
|
|
}
|
|
|
|
return $value ^ $key;
|
|
}
|
|
}
|