- more injection

- less static calls
- use params on sql queries
- handle sql exception on database and user creation gracefully
This commit is contained in:
Thomas Müller 2015-07-30 00:04:30 +02:00
parent 114f128fc3
commit c3cac887f5
6 changed files with 118 additions and 66 deletions

View file

@ -61,7 +61,10 @@ class Install extends Command {
protected function execute(InputInterface $input, OutputInterface $output) {
// validate the environment
$setupHelper = new Setup($this->config, \OC::$server->getIniWrapper(), \OC::$server->getL10N('lib'), new \OC_Defaults());
$server = \OC::$server;
$setupHelper = new Setup($this->config, $server->getIniWrapper(),
$server->getL10N('lib'), new \OC_Defaults(), $server->getLogger(),
$server->getSecureRandom());
$sysInfo = $setupHelper->getSystemInfo(true);
$errors = $sysInfo['errors'];
if (count($errors) > 0) {

View file

@ -835,7 +835,9 @@ class OC {
// Check if ownCloud is installed or in maintenance (update) mode
if (!$systemConfig->getValue('installed', false)) {
\OC::$server->getSession()->clear();
$setupHelper = new OC\Setup(\OC::$server->getConfig(), \OC::$server->getIniWrapper(), \OC::$server->getL10N('lib'), new \OC_Defaults());
$setupHelper = new OC\Setup(\OC::$server->getConfig(), \OC::$server->getIniWrapper(),
\OC::$server->getL10N('lib'), new \OC_Defaults(), \OC::$server->getLogger(),
\OC::$server->getSecureRandom());
$controller = new OC\Core\Setup\Controller($setupHelper);
$controller->run($_POST);
exit();

View file

@ -39,6 +39,8 @@ use bantu\IniGetWrapper\IniGetWrapper;
use Exception;
use OCP\IConfig;
use OCP\IL10N;
use OCP\ILogger;
use OCP\Security\ISecureRandom;
class Setup {
/** @var \OCP\IConfig */
@ -49,6 +51,10 @@ class Setup {
protected $l10n;
/** @var \OC_Defaults */
protected $defaults;
/** @var ILogger */
protected $logger;
/** @var ISecureRandom */
protected $random;
/**
* @param IConfig $config
@ -58,11 +64,16 @@ class Setup {
function __construct(IConfig $config,
IniGetWrapper $iniWrapper,
IL10N $l10n,
\OC_Defaults $defaults) {
\OC_Defaults $defaults,
ILogger $logger,
ISecureRandom $random
) {
$this->config = $config;
$this->iniWrapper = $iniWrapper;
$this->l10n = $l10n;
$this->defaults = $defaults;
$this->logger = $logger;
$this->random = $random;
}
static $dbSetupClasses = array(
@ -249,7 +260,8 @@ class Setup {
$class = self::$dbSetupClasses[$dbType];
/** @var \OC\Setup\AbstractDatabase $dbSetup */
$dbSetup = new $class($l, 'db_structure.xml', $this->config);
$dbSetup = new $class($l, 'db_structure.xml', $this->config,
$this->logger, $this->random);
$error = array_merge($error, $dbSetup->validate($options));
// validate the data directory
@ -284,9 +296,9 @@ class Setup {
}
//generate a random salt that is used to salt the local user passwords
$salt = \OC::$server->getSecureRandom()->getLowStrengthGenerator()->generate(30);
$salt = $this->random->getLowStrengthGenerator()->generate(30);
// generate a secret
$secret = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(48);
$secret = $this->random->getMediumStrengthGenerator()->generate(48);
//write the config file
$this->config->setSystemValues([
@ -351,7 +363,7 @@ class Setup {
//try to write logtimezone
if (date_default_timezone_get()) {
\OC_Config::setValue('logtimezone', date_default_timezone_get());
$config->setSystemValue('logtimezone', date_default_timezone_get());
}
//and we are done
@ -389,7 +401,9 @@ class Setup {
* @throws \OC\HintException If .htaccess does not include the current version
*/
public static function updateHtaccess() {
$setupHelper = new \OC\Setup(\OC::$server->getConfig(), \OC::$server->getIniWrapper(), \OC::$server->getL10N('lib'), new \OC_Defaults());
$setupHelper = new \OC\Setup(\OC::$server->getConfig(), \OC::$server->getIniWrapper(),
\OC::$server->getL10N('lib'), new \OC_Defaults(), \OC::$server->getLogger(),
\OC::$server->getSecureRandom());
if(!$setupHelper->isCurrentHtaccess()) {
throw new \OC\HintException('.htaccess file has the wrong version. Please upload the correct version. Maybe you forgot to replace it after updating?');
}

View file

@ -23,6 +23,8 @@
namespace OC\Setup;
use OCP\IConfig;
use OCP\ILogger;
use OCP\Security\ISecureRandom;
abstract class AbstractDatabase {
@ -42,11 +44,17 @@ abstract class AbstractDatabase {
protected $tablePrefix;
/** @var IConfig */
protected $config;
/** @var ILogger */
protected $logger;
/** @var ISecureRandom */
protected $random;
public function __construct($trans, $dbDefinitionFile, IConfig $config) {
public function __construct($trans, $dbDefinitionFile, IConfig $config, ILogger $logger, ISecureRandom $random) {
$this->trans = $trans;
$this->dbDefinitionFile = $dbDefinitionFile;
$this->config = $config;
$this->logger = $logger;
$this->random = $random;
}
public function validate($config) {
@ -70,7 +78,7 @@ abstract class AbstractDatabase {
$dbHost = !empty($config['dbhost']) ? $config['dbhost'] : 'localhost';
$dbTablePrefix = isset($config['dbtableprefix']) ? $config['dbtableprefix'] : 'oc_';
\OC_Config::setValues([
$this->config->setSystemValues([
'dbname' => $dbName,
'dbhost' => $dbHost,
'dbtableprefix' => $dbTablePrefix,

View file

@ -24,6 +24,7 @@
namespace OC\Setup;
use OC\DB\ConnectionFactory;
use OCP\IDBConnection;
class MySQL extends AbstractDatabase {
public $dbprettyname = 'MySQL/MariaDB';
@ -31,58 +32,15 @@ class MySQL extends AbstractDatabase {
public function setupDatabase($username) {
//check if the database user has admin right
$connection = $this->connect();
//user already specified in config
$oldUser=\OC_Config::getValue('dbuser', false);
//we don't have a dbuser specified in config
if($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
$query="SELECT user FROM mysql.user WHERE user='$adminUser'";
$result = $connection->executeQuery($query);
//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=\OC_Util::generateRandomBytes(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;
}
};
\OC_Config::setValues([
'dbuser' => $this->dbUser,
'dbpassword' => $this->dbPassword,
]);
}
$this->createSpecificUser($username, $connection);
//create the database
$this->createDatabase($connection);
//fill the database if needed
$query='select count(*) from information_schema.tables'
." where table_schema='".$this->dbName."' AND table_name = '".$this->tablePrefix."users';";
$result = $connection->executeQuery($query);
$query='select count(*) from information_schema.tables where table_schema=? AND table_name = ?';
$result = $connection->executeQuery($query, [$this->dbName, $this->tablePrefix.'users']);
$row = $result->fetch();
if(!$result or $row[0]==0) {
\OC_DB::createDbFromStructure($this->dbDefinitionFile);
@ -93,19 +51,26 @@ class MySQL extends AbstractDatabase {
* @param \OC\DB\Connection $connection
*/
private function createDatabase($connection) {
$name = $this->dbName;
$user = $this->dbUser;
//we cant use OC_BD functions here because we need to connect as the administrative user.
$query = "CREATE DATABASE IF NOT EXISTS `$name` CHARACTER SET utf8 COLLATE utf8_bin;";
$connection->executeUpdate($query);
try{
$name = $this->dbName;
$user = $this->dbUser;
//we cant use OC_BD functions here because we need to connect as the administrative user.
$query = "CREATE DATABASE IF NOT EXISTS `$name` CHARACTER SET utf8 COLLATE utf8_bin;";
$connection->executeUpdate($query);
//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);
//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->error('Database creation failed: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
}
}
/**
* @param \OC\DB\Connection $connection
* @param IDbConnection $connection
* @throws \OC\DatabaseSetupException
*/
private function createDBUser($connection) {
@ -134,4 +99,63 @@ class MySQL extends AbstractDatabase {
$cf = new ConnectionFactory();
return $cf->getConnection($type, $connectionParams);
}
/**
* @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->getMediumStrengthGenerator()->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->error('Specific user creation failed: {error}', [
'app' => 'mysql.setup',
'error' => $ex->getMessage()
]);
}
$this->config->setSystemValues([
'dbuser' => $this->dbUser,
'dbpassword' => $this->dbPassword,
]);
}
}

View file

@ -567,7 +567,8 @@ class OC_Util {
}
$webServerRestart = false;
$setup = new \OC\Setup($config, \OC::$server->getIniWrapper(), \OC::$server->getL10N('lib'), new \OC_Defaults());
$setup = new \OC\Setup($config, \OC::$server->getIniWrapper(), \OC::$server->getL10N('lib'),
new \OC_Defaults(), \OC::$server->getLogger(), \OC::$server->getSecureRandom());
$availableDatabases = $setup->getSupportedDatabases();
if (empty($availableDatabases)) {
$errors[] = array(