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<?php
/**
* ownCloud
*
* @author Florin Peter
* @copyright 2013 Florin Peter <owncloud@florin-peter.de>
*
* 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;
/**
* @brief Class to manage registration of hooks an various helper methods
* @package OCA\Encryption
*/
class Helper {
/**
* @brief register share related hooks
*
*/
public static function registerShareHooks() {
\OCP\Util::connectHook('OCP\Share', 'pre_shared', 'OCA\Encryption\Hooks', 'preShared');
\OCP\Util::connectHook('OCP\Share', 'post_shared', 'OCA\Encryption\Hooks', 'postShared');
\OCP\Util::connectHook('OCP\Share', 'post_unshare', 'OCA\Encryption\Hooks', 'postUnshare');
}
/**
* @brief register user related hooks
*
*/
public static function registerUserHooks() {
\OCP\Util::connectHook('OC_User', 'post_login', 'OCA\Encryption\Hooks', 'login');
\OCP\Util::connectHook('OC_User', 'post_setPassword', 'OCA\Encryption\Hooks', 'setPassphrase');
\OCP\Util::connectHook('OC_User', 'post_createUser', 'OCA\Encryption\Hooks', 'postCreateUser');
\OCP\Util::connectHook('OC_User', 'post_deleteUser', 'OCA\Encryption\Hooks', 'postDeleteUser');
}
/**
* @brief register filesystem related hooks
*
*/
public static function registerFilesystemHooks() {
\OCP\Util::connectHook('OC_Filesystem', 'post_rename', 'OCA\Encryption\Hooks', 'postRename');
}
/**
* @brief setup user for files_encryption
*
* @param Util $util
* @param string $password
* @return bool
*/
public static function setupUser($util, $password) {
// Check files_encryption infrastructure is ready for action
if (!$util->ready()) {
\OCP\Util::writeLog('Encryption library', 'User account "' . $util->getUserId()
. '" is not ready for encryption; configuration started', \OCP\Util::DEBUG);
if (!$util->setupServerSide($password)) {
return false;
}
}
return true;
}
/**
* @brief enable recovery
*
* @param $recoveryKeyId
* @param $recoveryPassword
* @internal param \OCA\Encryption\Util $util
* @internal param string $password
* @return bool
*/
public static function adminEnableRecovery($recoveryKeyId, $recoveryPassword) {
$view = new \OC\Files\View('/');
if ($recoveryKeyId === null) {
$recoveryKeyId = 'recovery_' . substr(md5(time()), 0, 8);
\OC_Appconfig::setValue('files_encryption', 'recoveryKeyId', $recoveryKeyId);
}
if (!$view->is_dir('/owncloud_private_key')) {
$view->mkdir('/owncloud_private_key');
}
if (
(!$view->file_exists("/public-keys/" . $recoveryKeyId . ".public.key")
|| !$view->file_exists("/owncloud_private_key/" . $recoveryKeyId . ".private.key"))
) {
$keypair = \OCA\Encryption\Crypt::createKeypair();
\OC_FileProxy::$enabled = false;
// Save public key
if (!$view->is_dir('/public-keys')) {
$view->mkdir('/public-keys');
}
$view->file_put_contents('/public-keys/' . $recoveryKeyId . '.public.key', $keypair['publicKey']);
// Encrypt private key empthy passphrase
$encryptedPrivateKey = \OCA\Encryption\Crypt::symmetricEncryptFileContent($keypair['privateKey'], $recoveryPassword);
// Save private key
$view->file_put_contents('/owncloud_private_key/' . $recoveryKeyId . '.private.key', $encryptedPrivateKey);
// create control file which let us check later on if the entered password was correct.
$encryptedControlData = \OCA\Encryption\Crypt::keyEncrypt("ownCloud", $keypair['publicKey']);
if (!$view->is_dir('/control-file')) {
$view->mkdir('/control-file');
}
$view->file_put_contents('/control-file/controlfile.enc', $encryptedControlData);
\OC_FileProxy::$enabled = true;
// Set recoveryAdmin as enabled
\OC_Appconfig::setValue('files_encryption', 'recoveryAdminEnabled', 1);
$return = true;
} else { // get recovery key and check the password
$util = new \OCA\Encryption\Util(new \OC_FilesystemView('/'), \OCP\User::getUser());
$return = $util->checkRecoveryPassword($recoveryPassword);
if ($return) {
\OC_Appconfig::setValue('files_encryption', 'recoveryAdminEnabled', 1);
}
}
return $return;
}
/**
* @brief disable recovery
*
* @param $recoveryPassword
* @return bool
*/
public static function adminDisableRecovery($recoveryPassword) {
$util = new Util(new \OC_FilesystemView('/'), \OCP\User::getUser());
$return = $util->checkRecoveryPassword($recoveryPassword);
if ($return) {
// Set recoveryAdmin as disabled
\OC_Appconfig::setValue('files_encryption', 'recoveryAdminEnabled', 0);
}
return $return;
}
/**
* @brief checks if access is public/anonymous user
* @return bool
*/
public static function isPublicAccess() {
if (\OCP\USER::getUser() === false
|| (isset($_GET['service']) && $_GET['service'] == 'files'
&& isset($_GET['t']))
) {
return true;
} else {
return false;
}
}
}
|
