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![Faraz Samapoor](/assets/img/avatar_default.png)
Mainly using PHP8's constructor property promotion. Signed-off-by: Faraz Samapoor <fsa@adlas.at>
127 lines
3.4 KiB
PHP
127 lines
3.4 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2023 Joas Schilling <coding@schilljs.com>
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* @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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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\RateLimiting\Backend;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\ICache;
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use OCP\ICacheFactory;
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use OCP\IConfig;
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/**
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* Class MemoryCacheBackend uses the configured distributed memory cache for storing
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* rate limiting data.
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*
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* @package OC\Security\RateLimiting\Backend
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*/
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class MemoryCacheBackend implements IBackend {
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private ICache $cache;
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public function __construct(
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private IConfig $config,
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ICacheFactory $cacheFactory,
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private ITimeFactory $timeFactory,
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) {
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$this->cache = $cacheFactory->createDistributed(__CLASS__);
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}
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private function hash(
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string $methodIdentifier,
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string $userIdentifier,
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): string {
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return hash('sha512', $methodIdentifier . $userIdentifier);
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}
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private function getExistingAttempts(string $identifier): array {
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$cachedAttempts = $this->cache->get($identifier);
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if ($cachedAttempts === null) {
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return [];
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}
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$cachedAttempts = json_decode($cachedAttempts, true);
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if (\is_array($cachedAttempts)) {
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return $cachedAttempts;
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}
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return [];
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}
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/**
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* {@inheritDoc}
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*/
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public function getAttempts(
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string $methodIdentifier,
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string $userIdentifier,
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): int {
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$identifier = $this->hash($methodIdentifier, $userIdentifier);
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$existingAttempts = $this->getExistingAttempts($identifier);
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$count = 0;
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$currentTime = $this->timeFactory->getTime();
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foreach ($existingAttempts as $expirationTime) {
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if ($expirationTime > $currentTime) {
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$count++;
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}
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}
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return $count;
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}
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/**
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* {@inheritDoc}
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*/
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public function registerAttempt(
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string $methodIdentifier,
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string $userIdentifier,
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int $period,
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): void {
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$identifier = $this->hash($methodIdentifier, $userIdentifier);
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$existingAttempts = $this->getExistingAttempts($identifier);
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$currentTime = $this->timeFactory->getTime();
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// Unset all attempts that are already expired
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foreach ($existingAttempts as $key => $expirationTime) {
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if ($expirationTime < $currentTime) {
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unset($existingAttempts[$key]);
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}
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}
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$existingAttempts = array_values($existingAttempts);
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// Store the new attempt
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$existingAttempts[] = (string)($currentTime + $period);
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if (!$this->config->getSystemValueBool('ratelimit.protection.enabled', true)) {
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return;
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}
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$this->cache->set($identifier, json_encode($existingAttempts));
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}
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}
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