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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Security\CSRF;
use OC\Security\CSRF\TokenStorage\SessionStorage;
/**
* Class CsrfTokenManager is the manager for all CSRF token related activities.
*
* @package OC\Security\CSRF
*/
class CsrfTokenManager {
private SessionStorage $sessionStorage;
private ?CsrfToken $csrfToken = null;
public function __construct(
private CsrfTokenGenerator $tokenGenerator,
SessionStorage $storageInterface,
) {
$this->sessionStorage = $storageInterface;
}
/**
* Returns the current CSRF token, if none set it will create a new one.
*/
public function getToken(): CsrfToken {
if (!\is_null($this->csrfToken)) {
return $this->csrfToken;
}
if ($this->sessionStorage->hasToken()) {
$value = $this->sessionStorage->getToken();
} else {
$value = $this->tokenGenerator->generateToken();
$this->sessionStorage->setToken($value);
}
$this->csrfToken = new CsrfToken($value);
return $this->csrfToken;
}
/**
* Invalidates any current token and sets a new one.
*/
public function refreshToken(): CsrfToken {
$value = $this->tokenGenerator->generateToken();
$this->sessionStorage->setToken($value);
$this->csrfToken = new CsrfToken($value);
return $this->csrfToken;
}
/**
* Remove the current token from the storage.
*/
public function removeToken(): void {
$this->csrfToken = null;
$this->sessionStorage->removeToken();
}
/**
* Verifies whether the provided token is valid.
*/
public function isTokenValid(CsrfToken $token): bool {
if (!$this->sessionStorage->hasToken()) {
return false;
}
return hash_equals(
$this->sessionStorage->getToken(),
$token->getDecryptedValue()
);
}
}
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