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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2020 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Core\Command\Maintenance;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\IUser;
use OCP\IUserManager;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Question\ConfirmationQuestion;
class RepairShareOwnership extends Command {
public function __construct(
private IDBConnection $dbConnection,
private IUserManager $userManager,
) {
parent::__construct();
}
protected function configure() {
$this
->setName('maintenance:repair-share-owner')
->setDescription('repair invalid share-owner entries in the database')
->addOption('no-confirm', 'y', InputOption::VALUE_NONE, "Don't ask for confirmation before repairing the shares")
->addArgument('user', InputArgument::OPTIONAL, "User to fix incoming shares for, if omitted all users will be fixed");
}
protected function execute(InputInterface $input, OutputInterface $output): int {
$noConfirm = $input->getOption('no-confirm');
$userId = $input->getArgument('user');
if ($userId) {
$user = $this->userManager->get($userId);
if (!$user) {
$output->writeln("<error>user $userId not found</error>");
return 1;
}
$shares = $this->getWrongShareOwnershipForUser($user);
} else {
$shares = $this->getWrongShareOwnership();
}
if ($shares) {
$output->writeln("");
$output->writeln("Found " . count($shares) . " shares with invalid share owner");
foreach ($shares as $share) {
/** @var array{shareId: int, fileTarget: string, initiator: string, receiver: string, owner: string, mountOwner: string} $share */
$output->writeln(" - share {$share['shareId']} from \"{$share['initiator']}\" to \"{$share['receiver']}\" at \"{$share['fileTarget']}\", owned by \"{$share['owner']}\", that should be owned by \"{$share['mountOwner']}\"");
}
$output->writeln("");
if (!$noConfirm) {
$helper = $this->getHelper('question');
$question = new ConfirmationQuestion('Repair these shares? [y/N]', false);
if (!$helper->ask($input, $output, $question)) {
return 0;
}
}
$output->writeln("Repairing " . count($shares) . " shares");
$this->repairShares($shares);
} else {
$output->writeln("Found no shares with invalid share owner");
}
return 0;
}
/**
* @return array{shareId: int, fileTarget: string, initiator: string, receiver: string, owner: string, mountOwner: string}[]
* @throws \OCP\DB\Exception
*/
protected function getWrongShareOwnership(): array {
$qb = $this->dbConnection->getQueryBuilder();
$brokenShares = $qb
->select('s.id', 'm.user_id', 's.uid_owner', 's.uid_initiator', 's.share_with', 's.file_target')
->from('share', 's')
->join('s', 'filecache', 'f', $qb->expr()->eq('s.item_source', $qb->expr()->castColumn('f.fileid', IQueryBuilder::PARAM_STR)))
->join('s', 'mounts', 'm', $qb->expr()->eq('f.storage', 'm.storage_id'))
->where($qb->expr()->neq('m.user_id', 's.uid_owner'))
->andWhere($qb->expr()->eq($qb->func()->concat($qb->expr()->literal('/'), 'm.user_id', $qb->expr()->literal('/')), 'm.mount_point'))
->executeQuery()
->fetchAll();
$found = [];
foreach ($brokenShares as $share) {
$found[] = [
'shareId' => (int) $share['id'],
'fileTarget' => $share['file_target'],
'initiator' => $share['uid_initiator'],
'receiver' => $share['share_with'],
'owner' => $share['uid_owner'],
'mountOwner' => $share['user_id'],
];
}
return $found;
}
/**
* @param IUser $user
* @return array{shareId: int, fileTarget: string, initiator: string, receiver: string, owner: string, mountOwner: string}[]
* @throws \OCP\DB\Exception
*/
protected function getWrongShareOwnershipForUser(IUser $user): array {
$qb = $this->dbConnection->getQueryBuilder();
$brokenShares = $qb
->select('s.id', 'm.user_id', 's.uid_owner', 's.uid_initiator', 's.share_with', 's.file_target')
->from('share', 's')
->join('s', 'filecache', 'f', $qb->expr()->eq('s.item_source', $qb->expr()->castColumn('f.fileid', IQueryBuilder::PARAM_STR)))
->join('s', 'mounts', 'm', $qb->expr()->eq('f.storage', 'm.storage_id'))
->where($qb->expr()->neq('m.user_id', 's.uid_owner'))
->andWhere($qb->expr()->eq($qb->func()->concat($qb->expr()->literal('/'), 'm.user_id', $qb->expr()->literal('/')), 'm.mount_point'))
->andWhere($qb->expr()->eq('s.share_with', $qb->createNamedParameter($user->getUID())))
->executeQuery()
->fetchAll();
$found = [];
foreach ($brokenShares as $share) {
$found[] = [
'shareId' => (int) $share['id'],
'fileTarget' => $share['file_target'],
'initiator' => $share['uid_initiator'],
'receiver' => $share['share_with'],
'owner' => $share['uid_owner'],
'mountOwner' => $share['user_id'],
];
}
return $found;
}
/**
* @param array{shareId: int, fileTarget: string, initiator: string, receiver: string, owner: string, mountOwner: string}[] $shares
* @return void
*/
protected function repairShares(array $shares) {
$this->dbConnection->beginTransaction();
$update = $this->dbConnection->getQueryBuilder();
$update->update('share')
->set('uid_owner', $update->createParameter('share_owner'))
->set('uid_initiator', $update->createParameter('share_initiator'))
->where($update->expr()->eq('id', $update->createParameter('share_id')));
foreach ($shares as $share) {
/** @var array{shareId: int, fileTarget: string, initiator: string, receiver: string, owner: string, mountOwner: string} $share */
$update->setParameter('share_id', $share['shareId'], IQueryBuilder::PARAM_INT);
$update->setParameter('share_owner', $share['mountOwner']);
// if the broken owner is also the initiator it's safe to update them both, otherwise we don't touch the initiator
if ($share['initiator'] === $share['owner']) {
$update->setParameter('share_initiator', $share['mountOwner']);
} else {
$update->setParameter('share_initiator', $share['initiator']);
}
$update->executeStatement();
}
$this->dbConnection->commit();
}
}
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