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112 lines
2.8 KiB
112 lines
2.8 KiB
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Security\CSRF;
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use OC\Security\CSRF\TokenStorage\SessionStorage;
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/**
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* Class CsrfTokenManager is the manager for all CSRF token related activities.
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*
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* @package OC\Security\CSRF
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*/
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class CsrfTokenManager {
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/** @var CsrfTokenGenerator */
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private $tokenGenerator;
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/** @var SessionStorage */
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private $sessionStorage;
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/** @var CsrfToken|null */
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private $csrfToken = null;
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/**
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* @param CsrfTokenGenerator $tokenGenerator
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* @param SessionStorage $storageInterface
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*/
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public function __construct(CsrfTokenGenerator $tokenGenerator,
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SessionStorage $storageInterface) {
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$this->tokenGenerator = $tokenGenerator;
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$this->sessionStorage = $storageInterface;
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}
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/**
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* Returns the current CSRF token, if none set it will create a new one.
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*
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* @return CsrfToken
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*/
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public function getToken(): CsrfToken {
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if (!\is_null($this->csrfToken)) {
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return $this->csrfToken;
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}
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if ($this->sessionStorage->hasToken()) {
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$value = $this->sessionStorage->getToken();
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} else {
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$value = $this->tokenGenerator->generateToken();
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$this->sessionStorage->setToken($value);
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}
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$this->csrfToken = new CsrfToken($value);
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return $this->csrfToken;
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}
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/**
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* Invalidates any current token and sets a new one.
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*
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* @return CsrfToken
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*/
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public function refreshToken(): CsrfToken {
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$value = $this->tokenGenerator->generateToken();
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$this->sessionStorage->setToken($value);
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$this->csrfToken = new CsrfToken($value);
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return $this->csrfToken;
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}
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/**
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* Remove the current token from the storage.
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*/
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public function removeToken() {
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$this->csrfToken = null;
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$this->sessionStorage->removeToken();
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}
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/**
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* Verifies whether the provided token is valid.
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*
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* @param CsrfToken $token
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* @return bool
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*/
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public function isTokenValid(CsrfToken $token): bool {
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if (!$this->sessionStorage->hasToken()) {
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return false;
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}
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return hash_equals(
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$this->sessionStorage->getToken(),
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$token->getDecryptedValue()
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);
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}
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}
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