nextcloud/apps/files_encryption/hooks/hooks.php

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<?php
/**
* ownCloud
*
* @author Sam Tuke
* @copyright 2012 Sam Tuke samtuke@owncloud.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Encryption;
/**
* Class for hook specific logic
*/
class Hooks {
# TODO: use passphrase for encrypting private key that is separate to the login password
/**
* @brief Startup encryption backend upon user login
* @note This method should never be called for users using client side encryption
*/
public static function login( $params ) {
if ( Crypt::mode( $params['uid'] ) == 'server' ) {
# TODO: use lots of dependency injection here
$view = new \OC_FilesystemView( '/' );
$util = new Util( $view, $params['uid'] );
if ( !$util->ready()) {
return $util->setupServerSide( $params['password'] );
}
\OC_FileProxy::$enabled = false;
$encryptedKey = Keymanager::getPrivateKey( $params['uid'], $view );
\OC_FileProxy::$enabled = true;
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# TODO: dont manually encrypt the private keyfile - use the config options of openssl_pkey_export instead for better mobile compatibility
$_SESSION['enckey'] = Crypt::symmetricDecryptFileContent( $encryptedKey, $params['password'] );
}
return true;
}
/**
* @brief update the encryption key of the file uploaded by the client
*/
public static function updateKeyfile( $params ) {
if (Crypt::mode() == 'client')
if (isset($params['properties']['key'])) {
Keymanager::setFileKey($params['path'], $params['properties']['key']);
} else {
\OC_Log::write( 'Encryption library', "Client side encryption is enabled but the client doesn't provide a encryption key for the file!", \OC_Log::ERROR );
error_log("Client side encryption is enabled but the client doesn't provide a encryption key for the file!");
}
}
}
?>