389 lines
12 KiB
PHP
389 lines
12 KiB
PHP
<?php
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/**
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* @author Björn Schießle <schiessle@owncloud.com>
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* @author Joas Schilling <nickvergessen@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\Encryption;
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use OC\Files\View;
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use OCP\IConfig;
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use OCP\IDBConnection;
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use OCP\ILogger;
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class Migration {
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private $moduleId;
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/** @var \OC\Files\View */
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private $view;
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/** @var \OCP\IDBConnection */
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private $connection;
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/** @var IConfig */
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private $config;
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/** @var ILogger */
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private $logger;
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/** @var string*/
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protected $installedVersion;
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/**
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* @param IConfig $config
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* @param View $view
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* @param IDBConnection $connection
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* @param ILogger $logger
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*/
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public function __construct(IConfig $config, View $view, IDBConnection $connection, ILogger $logger) {
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$this->view = $view;
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$this->view->getUpdater()->disable();
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$this->connection = $connection;
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$this->moduleId = \OCA\Encryption\Crypto\Encryption::ID;
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$this->config = $config;
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$this->logger = $logger;
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$this->installedVersion = $this->config->getAppValue('files_encryption', 'installed_version', '-1');
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}
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public function finalCleanUp() {
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$this->view->deleteAll('files_encryption/public_keys');
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$this->updateFileCache();
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$this->config->deleteAppValue('files_encryption', 'installed_version');
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}
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/**
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* update file cache, copy unencrypted_size to the 'size' column
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*/
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private function updateFileCache() {
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// make sure that we don't update the file cache multiple times
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// only update during the first run
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if ($this->installedVersion !== '-1') {
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$query = $this->connection->getQueryBuilder();
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$query->update('filecache')
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->set('size', 'unencrypted_size')
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->where($query->expr()->eq('encrypted', $query->createParameter('encrypted')))
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->setParameter('encrypted', 1);
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$query->execute();
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}
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}
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/**
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* iterate through users and reorganize the folder structure
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*/
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public function reorganizeFolderStructure() {
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$this->reorganizeSystemFolderStructure();
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$limit = 500;
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$offset = 0;
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do {
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$users = \OCP\User::getUsers('', $limit, $offset);
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foreach ($users as $user) {
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$this->reorganizeFolderStructureForUser($user);
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}
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$offset += $limit;
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} while (count($users) >= $limit);
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}
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/**
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* reorganize system wide folder structure
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*/
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public function reorganizeSystemFolderStructure() {
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$this->createPathForKeys('/files_encryption');
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// backup system wide folders
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$this->backupSystemWideKeys();
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// rename system wide mount point
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$this->renameFileKeys('', '/files_encryption/keys');
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// rename system private keys
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$this->renameSystemPrivateKeys();
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$storage = $this->view->getMount('')->getStorage();
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$storage->getScanner()->scan('files_encryption');
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}
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/**
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* reorganize folder structure for user
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*
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* @param string $user
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*/
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public function reorganizeFolderStructureForUser($user) {
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// backup all keys
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\OC_Util::tearDownFS();
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\OC_Util::setupFS($user);
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if ($this->backupUserKeys($user)) {
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// rename users private key
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$this->renameUsersPrivateKey($user);
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$this->renameUsersPublicKey($user);
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// rename file keys
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$path = '/files_encryption/keys';
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$this->renameFileKeys($user, $path);
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$trashPath = '/files_trashbin/keys';
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if (\OC_App::isEnabled('files_trashbin') && $this->view->is_dir($user . '/' . $trashPath)) {
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$this->renameFileKeys($user, $trashPath, true);
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$this->view->deleteAll($trashPath);
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}
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// delete old folders
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$this->deleteOldKeys($user);
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$this->view->getMount('/' . $user)->getStorage()->getScanner()->scan('files_encryption');
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}
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}
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/**
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* update database
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*/
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public function updateDB() {
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// make sure that we don't update the file cache multiple times
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// only update during the first run
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if ($this->installedVersion === '-1') {
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return;
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}
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// delete left-over from old encryption which is no longer needed
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$this->config->deleteAppValue('files_encryption', 'ocsid');
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$this->config->deleteAppValue('files_encryption', 'types');
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$this->config->deleteAppValue('files_encryption', 'enabled');
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$oldAppValues = $this->connection->getQueryBuilder();
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$oldAppValues->select('*')
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->from('appconfig')
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->where($oldAppValues->expr()->eq('appid', $oldAppValues->createParameter('appid')))
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->setParameter('appid', 'files_encryption');
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$appSettings = $oldAppValues->execute();
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while ($row = $appSettings->fetch()) {
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// 'installed_version' gets deleted at the end of the migration process
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if ($row['configkey'] !== 'installed_version' ) {
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$this->config->setAppValue('encryption', $row['configkey'], $row['configvalue']);
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$this->config->deleteAppValue('files_encryption', $row['configkey']);
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}
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}
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$oldPreferences = $this->connection->getQueryBuilder();
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$oldPreferences->select('*')
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->from('preferences')
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->where($oldPreferences->expr()->eq('appid', $oldPreferences->createParameter('appid')))
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->setParameter('appid', 'files_encryption');
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$preferenceSettings = $oldPreferences->execute();
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while ($row = $preferenceSettings->fetch()) {
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$this->config->setUserValue($row['userid'], 'encryption', $row['configkey'], $row['configvalue']);
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$this->config->deleteUserValue($row['userid'], 'files_encryption', $row['configkey']);
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}
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}
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/**
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* create backup of system-wide keys
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*/
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private function backupSystemWideKeys() {
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$backupDir = 'encryption_migration_backup_' . date("Y-m-d_H-i-s");
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$this->view->mkdir($backupDir);
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$this->view->copy('files_encryption', $backupDir . '/files_encryption');
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}
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/**
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* create backup of user specific keys
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*
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* @param string $user
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* @return bool
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*/
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private function backupUserKeys($user) {
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$encryptionDir = $user . '/files_encryption';
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if ($this->view->is_dir($encryptionDir)) {
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$backupDir = $user . '/encryption_migration_backup_' . date("Y-m-d_H-i-s");
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$this->view->mkdir($backupDir);
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$this->view->copy($encryptionDir, $backupDir);
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return true;
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}
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return false;
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}
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/**
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* rename system-wide private keys
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*/
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private function renameSystemPrivateKeys() {
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$dh = $this->view->opendir('files_encryption');
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$this->createPathForKeys('/files_encryption/' . $this->moduleId );
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if (is_resource($dh)) {
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while (($privateKey = readdir($dh)) !== false) {
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if (!\OC\Files\Filesystem::isIgnoredDir($privateKey) ) {
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if (!$this->view->is_dir('/files_encryption/' . $privateKey)) {
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$this->view->rename('files_encryption/' . $privateKey, 'files_encryption/' . $this->moduleId . '/' . $privateKey);
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$this->renameSystemPublicKey($privateKey);
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}
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}
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}
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closedir($dh);
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}
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}
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/**
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* rename system wide public key
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*
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* @param $privateKey private key for which we want to rename the corresponding public key
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*/
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private function renameSystemPublicKey($privateKey) {
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$publicKey = substr($privateKey,0 , strrpos($privateKey, '.privateKey')) . '.publicKey';
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$this->view->rename('files_encryption/public_keys/' . $publicKey, 'files_encryption/' . $this->moduleId . '/' . $publicKey);
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}
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/**
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* rename user-specific private keys
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*
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* @param string $user
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*/
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private function renameUsersPrivateKey($user) {
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$oldPrivateKey = $user . '/files_encryption/' . $user . '.privateKey';
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$newPrivateKey = $user . '/files_encryption/' . $this->moduleId . '/' . $user . '.privateKey';
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if ($this->view->file_exists($oldPrivateKey)) {
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$this->createPathForKeys(dirname($newPrivateKey));
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$this->view->rename($oldPrivateKey, $newPrivateKey);
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}
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}
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/**
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* rename user-specific public keys
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*
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* @param string $user
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*/
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private function renameUsersPublicKey($user) {
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$oldPublicKey = '/files_encryption/public_keys/' . $user . '.publicKey';
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$newPublicKey = $user . '/files_encryption/' . $this->moduleId . '/' . $user . '.publicKey';
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if ($this->view->file_exists($oldPublicKey)) {
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$this->createPathForKeys(dirname($newPublicKey));
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$this->view->rename($oldPublicKey, $newPublicKey);
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}
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}
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/**
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* rename file keys
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*
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* @param string $user
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* @param string $path
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* @param bool $trash
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*/
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private function renameFileKeys($user, $path, $trash = false) {
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if ($this->view->is_dir($user . '/' . $path) === false) {
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$this->logger->info('Skip dir /' . $user . '/' . $path . ': does not exist');
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return;
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}
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$dh = $this->view->opendir($user . '/' . $path);
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if (is_resource($dh)) {
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while (($file = readdir($dh)) !== false) {
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if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
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if ($this->view->is_dir($user . '/' . $path . '/' . $file)) {
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$this->renameFileKeys($user, $path . '/' . $file, $trash);
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} else {
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$target = $this->getTargetDir($user, $path, $file, $trash);
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if ($target !== false) {
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$this->createPathForKeys(dirname($target));
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$this->view->rename($user . '/' . $path . '/' . $file, $target);
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} else {
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$this->logger->warning(
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'did not move key "' . $file
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. '" could not find the corresponding file in /data/' . $user . '/files.'
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. 'Most likely the key was already moved in a previous migration run and is already on the right place.');
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}
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}
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}
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}
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closedir($dh);
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}
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}
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/**
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* get system mount points
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* wrap static method so that it can be mocked for testing
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*
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* @internal
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* @return array
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*/
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protected function getSystemMountPoints() {
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return \OC_Mount_Config::getSystemMountPoints();
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}
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/**
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* generate target directory
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*
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* @param string $user
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* @param string $keyPath
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* @param string $filename
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* @param bool $trash
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* @return string
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*/
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private function getTargetDir($user, $keyPath, $filename, $trash) {
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if ($trash) {
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$filePath = substr($keyPath, strlen('/files_trashbin/keys/'));
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$targetDir = $user . '/files_encryption/keys/files_trashbin/' . $filePath . '/' . $this->moduleId . '/' . $filename;
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} else {
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$filePath = substr($keyPath, strlen('/files_encryption/keys/'));
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$targetDir = $user . '/files_encryption/keys/files/' . $filePath . '/' . $this->moduleId . '/' . $filename;
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}
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if ($user === '') {
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// for system wide mounts we need to check if the mount point really exists
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$normalized = \OC\Files\Filesystem::normalizePath($filePath);
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$systemMountPoints = $this->getSystemMountPoints();
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foreach ($systemMountPoints as $mountPoint) {
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$normalizedMountPoint = \OC\Files\Filesystem::normalizePath($mountPoint['mountpoint']) . '/';
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if (strpos($normalized, $normalizedMountPoint) === 0)
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return $targetDir;
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}
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} else if ($trash === false && $this->view->file_exists('/' . $user. '/files/' . $filePath)) {
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return $targetDir;
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} else if ($trash === true && $this->view->file_exists('/' . $user. '/files_trashbin/' . $filePath)) {
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return $targetDir;
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}
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return false;
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}
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/**
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* delete old keys
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*
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* @param string $user
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*/
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private function deleteOldKeys($user) {
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$this->view->deleteAll($user . '/files_encryption/keyfiles');
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$this->view->deleteAll($user . '/files_encryption/share-keys');
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}
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/**
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* create directories for the keys recursively
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*
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* @param string $path
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*/
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private function createPathForKeys($path) {
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if (!$this->view->file_exists($path)) {
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$sub_dirs = explode('/', $path);
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$dir = '';
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foreach ($sub_dirs as $sub_dir) {
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$dir .= '/' . $sub_dir;
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if (!$this->view->is_dir($dir)) {
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$this->view->mkdir($dir);
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}
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}
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}
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}
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}
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