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![Joas Schilling](/assets/img/avatar_default.png)
Signed-off-by: Joas Schilling <coding@schilljs.com> Signed-off-by: Benjamin Gaussorgues <benjamin.gaussorgues@nextcloud.com>
242 lines
6.9 KiB
PHP
242 lines
6.9 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Daniel Kesselberg <mail@danielkesselberg.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author John Molakvoæ <skjnldsv@protonmail.com>
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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\Repair;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\DB\IResult;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\IConfig;
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use OCP\IDBConnection;
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use OCP\IGroupManager;
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use OCP\Migration\IOutput;
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use OCP\Migration\IRepairStep;
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use OCP\Notification\IManager;
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class RemoveLinkShares implements IRepairStep {
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/** @var IDBConnection */
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private $connection;
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/** @var IConfig */
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private $config;
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/** @var string[] */
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private $userToNotify = [];
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/** @var IGroupManager */
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private $groupManager;
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/** @var IManager */
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private $notificationManager;
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/** @var ITimeFactory */
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private $timeFactory;
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public function __construct(IDBConnection $connection,
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IConfig $config,
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IGroupManager $groupManager,
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IManager $notificationManager,
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ITimeFactory $timeFactory) {
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$this->connection = $connection;
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$this->config = $config;
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$this->groupManager = $groupManager;
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$this->notificationManager = $notificationManager;
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$this->timeFactory = $timeFactory;
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}
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public function getName(): string {
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return 'Remove potentially over exposing share links';
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}
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private function shouldRun(): bool {
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$versionFromBeforeUpdate = $this->config->getSystemValueString('version', '0.0.0');
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if (version_compare($versionFromBeforeUpdate, '14.0.11', '<')) {
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return true;
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}
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if (version_compare($versionFromBeforeUpdate, '15.0.8', '<')) {
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return true;
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}
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if (version_compare($versionFromBeforeUpdate, '16.0.0', '<=')) {
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return true;
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}
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return false;
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}
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/**
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* Delete the share
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*
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* @param int $id
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*/
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private function deleteShare(int $id): void {
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$qb = $this->connection->getQueryBuilder();
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$qb->delete('share')
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->where($qb->expr()->eq('id', $qb->createNamedParameter($id)));
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$qb->execute();
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}
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/**
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* Get the total of affected shares
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*
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* @return int
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*/
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private function getTotal(): int {
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$subSubQuery = $this->connection->getQueryBuilder();
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$subSubQuery->select('*')
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->from('share')
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->where($subSubQuery->expr()->isNotNull('parent'))
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->andWhere($subSubQuery->expr()->eq('share_type', $subSubQuery->expr()->literal(3, IQueryBuilder::PARAM_INT)));
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$subQuery = $this->connection->getQueryBuilder();
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$subQuery->select('s1.id')
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->from($subQuery->createFunction('(' . $subSubQuery->getSQL() . ')'), 's1')
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->join(
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's1', 'share', 's2',
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$subQuery->expr()->eq('s1.parent', 's2.id')
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)
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->where($subQuery->expr()->orX(
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$subQuery->expr()->eq('s2.share_type', $subQuery->expr()->literal(1, IQueryBuilder::PARAM_INT)),
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$subQuery->expr()->eq('s2.share_type', $subQuery->expr()->literal(2, IQueryBuilder::PARAM_INT))
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))
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->andWhere($subQuery->expr()->eq('s1.item_source', 's2.item_source'));
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$query = $this->connection->getQueryBuilder();
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$query->select($query->func()->count('*', 'total'))
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->from('share')
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->where($query->expr()->in('id', $query->createFunction($subQuery->getSQL())));
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$result = $query->execute();
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$data = $result->fetch();
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$result->closeCursor();
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return (int) $data['total'];
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}
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/**
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* Get the cursor to fetch all the shares
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*/
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private function getShares(): IResult {
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$subQuery = $this->connection->getQueryBuilder();
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$subQuery->select('*')
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->from('share')
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->where($subQuery->expr()->isNotNull('parent'))
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->andWhere($subQuery->expr()->eq('share_type', $subQuery->expr()->literal(3, IQueryBuilder::PARAM_INT)));
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$query = $this->connection->getQueryBuilder();
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$query->select('s1.id', 's1.uid_owner', 's1.uid_initiator')
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->from($query->createFunction('(' . $subQuery->getSQL() . ')'), 's1')
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->join(
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's1', 'share', 's2',
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$query->expr()->eq('s1.parent', 's2.id')
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)
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->where($query->expr()->orX(
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$query->expr()->eq('s2.share_type', $query->expr()->literal(1, IQueryBuilder::PARAM_INT)),
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$query->expr()->eq('s2.share_type', $query->expr()->literal(2, IQueryBuilder::PARAM_INT))
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))
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->andWhere($query->expr()->eq('s1.item_source', 's2.item_source'));
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/** @var IResult $result */
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$result = $query->execute();
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return $result;
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}
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/**
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* Process a single share
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*
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* @param array $data
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*/
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private function processShare(array $data): void {
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$id = $data['id'];
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$this->addToNotify($data['uid_owner']);
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$this->addToNotify($data['uid_initiator']);
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$this->deleteShare((int)$id);
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}
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/**
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* Update list of users to notify
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*
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* @param string $uid
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*/
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private function addToNotify(string $uid): void {
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if (!isset($this->userToNotify[$uid])) {
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$this->userToNotify[$uid] = true;
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}
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}
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/**
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* Send all notifications
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*/
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private function sendNotification(): void {
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$time = $this->timeFactory->getDateTime();
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$notification = $this->notificationManager->createNotification();
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$notification->setApp('core')
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->setDateTime($time)
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->setObject('repair', 'exposing_links')
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->setSubject('repair_exposing_links');
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$users = array_keys($this->userToNotify);
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foreach ($users as $user) {
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$notification->setUser((string) $user);
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$this->notificationManager->notify($notification);
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}
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}
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private function repair(IOutput $output, int $total): void {
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$output->startProgress($total);
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$shareResult = $this->getShares();
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while ($data = $shareResult->fetch()) {
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$this->processShare($data);
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$output->advance();
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}
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$output->finishProgress();
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$shareResult->closeCursor();
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// Notify all admins
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$adminGroup = $this->groupManager->get('admin');
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$adminUsers = $adminGroup->getUsers();
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foreach ($adminUsers as $user) {
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$this->addToNotify($user->getUID());
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}
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$output->info('Sending notifications to admins and affected users');
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$this->sendNotification();
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}
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public function run(IOutput $output): void {
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if ($this->shouldRun() === false || ($total = $this->getTotal()) === 0) {
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$output->info('No need to remove link shares.');
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return;
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}
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$output->info('Removing potentially over exposing link shares');
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$this->repair($output, $total);
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$output->info('Removed potentially over exposing link shares');
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}
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}
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