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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bart Visscher <bartv@thisnet.nl>
* @author Joas Schilling <coding@schilljs.com>
* @author Michael Göhler <somebody.here@gmx.de>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Stefan Weil <sw@weilnetz.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Setup;
use OC\DB\ConnectionFactory;
use OCP\IDBConnection;
class MySQL extends AbstractDatabase {
public $dbprettyname = 'MySQL/MariaDB';
public function setupDatabase($username) {
//check if the database user has admin right
$connection = $this->connect(['dbname' => null]);
$this->createSpecificUser($username, $connection);
//create the database
$this->createDatabase($connection);
//fill the database if needed
$query='select count(*) from information_schema.tables where table_schema=? AND table_name = ?';
$result = $connection->executeQuery($query, [$this->dbName, $this->tablePrefix.'users']);
$row = $result->fetch();
if (!$row or $row['count(*)'] === '0') {
\OC_DB::createDbFromStructure($this->dbDefinitionFile);
}
}
/**
* @param \OC\DB\Connection $connection
*/
private function createDatabase($connection) {
try{
$name = $this->dbName;
$user = $this->dbUser;
//we can't use OC_DB functions here because we need to connect as the administrative user.
$characterSet = \OC::$server->getSystemConfig()->getValue('mysql.utf8mb4', false) ? 'utf8mb4' : 'utf8';
$query = "CREATE DATABASE IF NOT EXISTS `$name` CHARACTER SET $characterSet COLLATE ${characterSet}_bin;";
$connection->executeUpdate($query);
} catch (\Exception $ex) {
$this->logger->error('Database creation failed: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
return;
}
try {
//this query will fail if there aren't the right permissions, ignore the error
$query="GRANT ALL PRIVILEGES ON `$name` . * TO '$user'";
$connection->executeUpdate($query);
} catch (\Exception $ex) {
$this->logger->debug('Could not automatically grant privileges, this can be ignored if database user already had privileges: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
}
}
/**
* @param IDBConnection $connection
* @throws \OC\DatabaseSetupException
*/
private function createDBUser($connection) {
try{
$name = $this->dbUser;
$password = $this->dbPassword;
// we need to create 2 accounts, one for global use and one for local user. if we don't specify the local one,
// the anonymous user would take precedence when there is one.
$query = "CREATE USER '$name'@'localhost' IDENTIFIED BY '$password'";
$connection->executeUpdate($query);
$query = "CREATE USER '$name'@'%' IDENTIFIED BY '$password'";
$connection->executeUpdate($query);
}
catch (\Exception $ex){
$this->logger->error('Database User creation failed: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
}
}
/**
* @param $username
* @param IDBConnection $connection
* @return array
*/
private function createSpecificUser($username, $connection) {
try {
//user already specified in config
$oldUser = $this->config->getSystemValue('dbuser', false);
//we don't have a dbuser specified in config
if ($this->dbUser !== $oldUser) {
//add prefix to the admin username to prevent collisions
$adminUser = substr('oc_' . $username, 0, 16);
$i = 1;
while (true) {
//this should be enough to check for admin rights in mysql
$query = 'SELECT user FROM mysql.user WHERE user=?';
$result = $connection->executeQuery($query, [$adminUser]);
//current dbuser has admin rights
if ($result) {
$data = $result->fetchAll();
//new dbuser does not exist
if (count($data) === 0) {
//use the admin login data for the new database user
$this->dbUser = $adminUser;
//create a random password so we don't need to store the admin password in the config file
$this->dbPassword = $this->random->generate(30);
$this->createDBUser($connection);
break;
} else {
//repeat with different username
$length = strlen((string)$i);
$adminUser = substr('oc_' . $username, 0, 16 - $length) . $i;
$i++;
}
} else {
break;
}
};
}
} catch (\Exception $ex) {
$this->logger->info('Can not create a new MySQL user, will continue with the provided user: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
}
$this->config->setSystemValues([
'dbuser' => $this->dbUser,
'dbpassword' => $this->dbPassword,
]);
}
}
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