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<?php
/**
* @author Clark Tomlinson <clark@owncloud.com>
* @since 2/19/15, 11:45 AM
* @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 OCA\Encryption;
use OCA\Encryption\Crypto\Crypt;
use OCP\Encryption\Keys\IStorage;
use OCP\IConfig;
use OCP\IUser;
use OCP\IUserSession;
use OCP\PreConditionNotMetException;
use OCP\Security\ISecureRandom;
class Recovery {
/**
* @var null|IUser
*/
protected $user;
/**
* @var Crypt
*/
protected $crypt;
/**
* @var ISecureRandom
*/
private $random;
/**
* @var KeyManager
*/
private $keyManager;
/**
* @var IConfig
*/
private $config;
/**
* @var IEncryptionKeyStorage
*/
private $keyStorage;
/**
* @param IUserSession $user
* @param Crypt $crypt
* @param ISecureRandom $random
* @param KeyManager $keyManager
* @param IConfig $config
* @param IStorage $keyStorage
*/
public function __construct(IUserSession $user,
Crypt $crypt,
ISecureRandom $random,
KeyManager $keyManager,
IConfig $config,
IStorage $keyStorage) {
$this->user = $user && $user->isLoggedIn() ? $user->getUser() : false;
$this->crypt = $crypt;
$this->random = $random;
$this->keyManager = $keyManager;
$this->config = $config;
$this->keyStorage = $keyStorage;
}
/**
* @param $recoveryKeyId
* @param $password
* @return bool
*/
public function enableAdminRecovery($recoveryKeyId, $password) {
$appConfig = $this->config;
if ($recoveryKeyId === null) {
$recoveryKeyId = $this->random->getLowStrengthGenerator();
$appConfig->setAppValue('encryption', 'recoveryKeyId', $recoveryKeyId);
}
$keyManager = $this->keyManager;
if (!$keyManager->recoveryKeyExists()) {
$keyPair = $this->crypt->createKeyPair();
return $this->keyManager->storeKeyPair($this->user->getUID(), $password, $keyPair);
}
if ($keyManager->checkRecoveryPassword($password)) {
$appConfig->setAppValue('encryption', 'recoveryAdminEnabled', 1);
return true;
}
return false;
}
/**
* @param $recoveryPassword
* @return bool
*/
public function disableAdminRecovery($recoveryPassword) {
$keyManager = $this->keyManager;
if ($keyManager->checkRecoveryPassword($recoveryPassword)) {
// Set recoveryAdmin as disabled
$this->config->setAppValue('encryption', 'recoveryAdminEnabled', 0);
return true;
}
return false;
}
public function addRecoveryKeys($keyId) {
// No idea new way to do this....
}
public function removeRecoveryKeys() {
// No idea new way to do this....
}
/**
* @return bool
*/
public function recoveryEnabledForUser() {
$recoveryMode = $this->config->getUserValue($this->user->getUID(),
'encryption',
'recoveryEnabled',
0);
return ($recoveryMode === '1');
}
/**
* @param $enabled
* @return bool
*/
public function setRecoveryForUser($enabled) {
$value = $enabled ? '1' : '0';
try {
$this->config->setUserValue($this->user->getUID(),
'encryption',
'recoveryEnabled',
$value);
return true;
} catch (PreConditionNotMetException $e) {
return false;
}
}
/**
* @param $recoveryPassword
*/
public function recoverUsersFiles($recoveryPassword) {
// todo: get system private key here
// $this->keyManager->get
$privateKey = $this->crypt->decryptPrivateKey($encryptedKey,
$recoveryPassword);
$this->recoverAllFiles('/', $privateKey);
}
}
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