107 lines
3.1 KiB
PHP
107 lines
3.1 KiB
PHP
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<?php
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/**
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* @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
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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;
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use OC\Security\Normalizer\IpAddress;
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use OC\Security\RateLimiting\Backend\IBackend;
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use OC\Security\RateLimiting\Exception\RateLimitExceededException;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IRequest;
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use OCP\IUser;
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use OCP\IUserSession;
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class Limiter {
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/** @var IBackend */
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private $backend;
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/** @var ITimeFactory */
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private $timeFactory;
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/**
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* @param IUserSession $userSession
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* @param IRequest $request
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* @param ITimeFactory $timeFactory
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* @param IBackend $backend
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*/
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public function __construct(IUserSession $userSession,
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IRequest $request,
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ITimeFactory $timeFactory,
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IBackend $backend) {
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$this->backend = $backend;
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$this->timeFactory = $timeFactory;
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}
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/**
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* @param string $methodIdentifier
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* @param string $userIdentifier
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* @param int $period
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* @param int $limit
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* @throws RateLimitExceededException
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*/
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private function register($methodIdentifier,
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$userIdentifier,
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$period,
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$limit) {
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$existingAttempts = $this->backend->getAttempts($methodIdentifier, $userIdentifier, (int)$period);
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if ($existingAttempts >= (int)$limit) {
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throw new RateLimitExceededException();
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}
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$this->backend->registerAttempt($methodIdentifier, $userIdentifier, $this->timeFactory->getTime());
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}
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/**
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* Registers attempt for an anonymous request
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*
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* @param string $identifier
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* @param int $anonLimit
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* @param int $anonPeriod
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* @param string $ip
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* @throws RateLimitExceededException
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*/
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public function registerAnonRequest($identifier,
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$anonLimit,
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$anonPeriod,
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$ip) {
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$ipSubnet = (new IpAddress($ip))->getSubnet();
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$anonHashIdentifier = hash('sha512', 'anon::' . $identifier . $ipSubnet);
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$this->register($identifier, $anonHashIdentifier, $anonPeriod, $anonLimit);
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}
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/**
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* Registers attempt for an authenticated request
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*
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* @param string $identifier
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* @param int $userLimit
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* @param int $userPeriod
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* @param IUser $user
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* @throws RateLimitExceededException
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*/
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public function registerUserRequest($identifier,
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$userLimit,
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$userPeriod,
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IUser $user) {
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$userHashIdentifier = hash('sha512', 'user::' . $identifier . $user->getUID());
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$this->register($identifier, $userHashIdentifier, $userPeriod, $userLimit);
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}
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}
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