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<?php
/**
* @author Björn Schießle <schiessle@owncloud.com>
* @author Jan-Christoph Borchardt <hey@jancborchardt.net>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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\Encryption;
use OC\Encryption\Keys\Storage;
use OC\Files\Filesystem;
use OC\Files\View;
use OC\ServiceUnavailableException;
use OCP\Encryption\IEncryptionModule;
use OCP\Encryption\IManager;
use OCP\IConfig;
use OCP\IL10N;
use OCP\ILogger;
class Manager implements IManager {
/** @var array */
protected $encryptionModules;
/** @var IConfig */
protected $config;
/** @var ILogger */
protected $logger;
/** @var Il10n */
protected $l;
/** @var View */
protected $rootView;
/** @var Util */
protected $util;
/**
* @param IConfig $config
* @param ILogger $logger
* @param IL10N $l10n
* @param View $rootView
* @param Util $util
*/
public function __construct(IConfig $config, ILogger $logger, IL10N $l10n, View $rootView, Util $util) {
$this->encryptionModules = array();
$this->config = $config;
$this->logger = $logger;
$this->l = $l10n;
$this->rootView = $rootView;
$this->util = $util;
}
/**
* Check if encryption is enabled
*
* @return bool true if enabled, false if not
*/
public function isEnabled() {
$installed = $this->config->getSystemValue('installed', false);
if (!$installed) {
return false;
}
$enabled = $this->config->getAppValue('core', 'encryption_enabled', 'no');
return $enabled === 'yes';
}
/**
* check if new encryption is ready
*
* @return bool
* @throws ServiceUnavailableException
*/
public function isReady() {
// check if we are still in transit between the old and the new encryption
$oldEncryption = $this->config->getAppValue('files_encryption', 'installed_version');
if (!empty($oldEncryption)) {
$warning = 'Installation is in transit between the old Encryption (ownCloud <= 8.0)
and the new encryption. Please enable the "Default encryption module"
and run \'occ encryption:migrate\'';
$this->logger->warning($warning);
return false;
}
if ($this->isKeyStorageReady() === false) {
throw new ServiceUnavailableException('Key Storage is not ready');
}
return true;
}
/**
* Registers an callback function which must return an encryption module instance
*
* @param string $id
* @param string $displayName
* @param callable $callback
* @throws Exceptions\ModuleAlreadyExistsException
*/
public function registerEncryptionModule($id, $displayName, callable $callback) {
if (isset($this->encryptionModules[$id])) {
throw new Exceptions\ModuleAlreadyExistsException($id, $displayName);
}
$this->encryptionModules[$id] = [
'id' => $id,
'displayName' => $displayName,
'callback' => $callback,
];
$defaultEncryptionModuleId = $this->getDefaultEncryptionModuleId();
if (empty($defaultEncryptionModuleId)) {
$this->setDefaultEncryptionModule($id);
}
}
/**
* Unregisters an encryption module
*
* @param string $moduleId
*/
public function unregisterEncryptionModule($moduleId) {
unset($this->encryptionModules[$moduleId]);
}
/**
* get a list of all encryption modules
*
* @return array [id => ['id' => $id, 'displayName' => $displayName, 'callback' => callback]]
*/
public function getEncryptionModules() {
return $this->encryptionModules;
}
/**
* get a specific encryption module
*
* @param string $moduleId
* @return IEncryptionModule
* @throws Exceptions\ModuleDoesNotExistsException
*/
public function getEncryptionModule($moduleId = '') {
if (!empty($moduleId)) {
if (isset($this->encryptionModules[$moduleId])) {
return call_user_func($this->encryptionModules[$moduleId]['callback']);
} else {
$message = "Module with id: $moduleId does not exist.";
$hint = $this->l->t('Module with id: %s does not exist. Please enable it in your apps settings or contact your administrator.', [$moduleId]);
throw new Exceptions\ModuleDoesNotExistsException($message, $hint);
}
} else {
return $this->getDefaultEncryptionModule();
}
}
/**
* get default encryption module
*
* @return \OCP\Encryption\IEncryptionModule
* @throws Exceptions\ModuleDoesNotExistsException
*/
protected function getDefaultEncryptionModule() {
$defaultModuleId = $this->getDefaultEncryptionModuleId();
if (!empty($defaultModuleId)) {
if (isset($this->encryptionModules[$defaultModuleId])) {
return call_user_func($this->encryptionModules[$defaultModuleId]['callback']);
} else {
$message = 'Default encryption module not loaded';
throw new Exceptions\ModuleDoesNotExistsException($message);
}
} else {
$message = 'No default encryption module defined';
throw new Exceptions\ModuleDoesNotExistsException($message);
}
}
/**
* set default encryption module Id
*
* @param string $moduleId
* @return bool
*/
public function setDefaultEncryptionModule($moduleId) {
try {
$this->getEncryptionModule($moduleId);
} catch (\Exception $e) {
return false;
}
$this->config->setAppValue('core', 'default_encryption_module', $moduleId);
return true;
}
/**
* get default encryption module Id
*
* @return string
*/
public function getDefaultEncryptionModuleId() {
return $this->config->getAppValue('core', 'default_encryption_module');
}
/**
* Add storage wrapper
*/
public static function setupStorage() {
$util = new Util(
new View(),
\OC::$server->getUserManager(),
\OC::$server->getGroupManager(),
\OC::$server->getConfig()
);
Filesystem::addStorageWrapper('oc_encryption', array($util, 'wrapStorage'), 2);
}
/**
* check if key storage is ready
*
* @return bool
*/
protected function isKeyStorageReady() {
$rootDir = $this->util->getKeyStorageRoot();
// the default root is always valid
if ($rootDir === '') {
return true;
}
// check if key storage is mounted correctly
if ($this->rootView->file_exists($rootDir . '/' . Storage::KEY_STORAGE_MARKER)) {
return true;
}
return false;
}
}
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