2015-07-24 13:24:18 +03:00
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<?php
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/**
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2016-07-21 18:07:57 +03:00
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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2016-05-26 20:56:05 +03:00
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* @author Björn Schießle <bjoern@schiessle.org>
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2015-07-24 13:24:18 +03:00
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*
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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 OC\Core\Command\Encryption;
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use OC\Encryption\Keys\Storage;
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use OC\Encryption\Util;
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use OC\Files\Filesystem;
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use OC\Files\View;
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use OCP\IConfig;
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use OCP\IUserManager;
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use Symfony\Component\Console\Command\Command;
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use Symfony\Component\Console\Helper\ProgressBar;
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use Symfony\Component\Console\Helper\QuestionHelper;
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use Symfony\Component\Console\Input\InputArgument;
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use Symfony\Component\Console\Input\InputInterface;
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use Symfony\Component\Console\Output\OutputInterface;
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use Symfony\Component\Console\Question\ConfirmationQuestion;
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class ChangeKeyStorageRoot extends Command {
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/** @var View */
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protected $rootView;
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/** @var IUserManager */
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protected $userManager;
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/** @var IConfig */
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protected $config;
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/** @var Util */
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protected $util;
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/** @var QuestionHelper */
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protected $questionHelper;
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/**
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* @param View $view
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* @param IUserManager $userManager
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* @param IConfig $config
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* @param Util $util
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* @param QuestionHelper $questionHelper
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*/
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public function __construct(View $view, IUserManager $userManager, IConfig $config, Util $util, QuestionHelper $questionHelper) {
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parent::__construct();
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$this->rootView = $view;
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$this->userManager = $userManager;
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$this->config = $config;
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$this->util = $util;
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$this->questionHelper = $questionHelper;
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}
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protected function configure() {
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parent::configure();
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$this
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->setName('encryption:change-key-storage-root')
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->setDescription('Change key storage root')
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->addArgument(
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'newRoot',
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InputArgument::OPTIONAL,
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'new root of the key storage relative to the data folder'
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);
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}
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protected function execute(InputInterface $input, OutputInterface $output) {
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$oldRoot = $this->util->getKeyStorageRoot();
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$newRoot = $input->getArgument('newRoot');
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if ($newRoot === null) {
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$question = new ConfirmationQuestion('No storage root given, do you want to reset the key storage root to the default location? (y/n) ', false);
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if (!$this->questionHelper->ask($input, $output, $question)) {
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return;
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}
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$newRoot = '';
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}
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$oldRootDescription = $oldRoot !== '' ? $oldRoot : 'default storage location';
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$newRootDescription = $newRoot !== '' ? $newRoot : 'default storage location';
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$output->writeln("Change key storage root from <info>$oldRootDescription</info> to <info>$newRootDescription</info>");
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$success = $this->moveAllKeys($oldRoot, $newRoot, $output);
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if ($success) {
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$this->util->setKeyStorageRoot($newRoot);
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$output->writeln('');
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$output->writeln("Key storage root successfully changed to <info>$newRootDescription</info>");
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}
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}
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/**
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* move keys to new key storage root
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*
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* @param string $oldRoot
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* @param string $newRoot
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* @param OutputInterface $output
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* @return bool
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* @throws \Exception
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*/
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protected function moveAllKeys($oldRoot, $newRoot, OutputInterface $output) {
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$output->writeln("Start to move keys:");
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2018-01-27 01:46:40 +03:00
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if ($this->rootView->is_dir($oldRoot) === false) {
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2015-07-24 13:24:18 +03:00
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$output->writeln("No old keys found: Nothing needs to be moved");
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return false;
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}
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$this->prepareNewRoot($newRoot);
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$this->moveSystemKeys($oldRoot, $newRoot);
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$this->moveUserKeys($oldRoot, $newRoot, $output);
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return true;
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}
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/**
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* prepare new key storage
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*
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* @param string $newRoot
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* @throws \Exception
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*/
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protected function prepareNewRoot($newRoot) {
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if ($this->rootView->is_dir($newRoot) === false) {
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throw new \Exception("New root folder doesn't exist. Please create the folder or check the permissions and try again.");
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}
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$result = $this->rootView->file_put_contents(
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$newRoot . '/' . Storage::KEY_STORAGE_MARKER,
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'ownCloud will detect this folder as key storage root only if this file exists'
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);
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if ($result === false) {
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throw new \Exception("Can't write to new root folder. Please check the permissions and try again");
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}
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}
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/**
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* move system key folder
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*
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* @param string $oldRoot
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* @param string $newRoot
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*/
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protected function moveSystemKeys($oldRoot, $newRoot) {
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if (
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$this->rootView->is_dir($oldRoot . '/files_encryption') &&
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$this->targetExists($newRoot . '/files_encryption') === false
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) {
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$this->rootView->rename($oldRoot . '/files_encryption', $newRoot . '/files_encryption');
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}
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}
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/**
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* setup file system for the given user
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*
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* @param string $uid
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*/
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protected function setupUserFS($uid) {
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\OC_Util::tearDownFS();
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\OC_Util::setupFS($uid);
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}
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/**
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* iterate over each user and move the keys to the new storage
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*
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* @param string $oldRoot
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* @param string $newRoot
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* @param OutputInterface $output
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*/
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protected function moveUserKeys($oldRoot, $newRoot, OutputInterface $output) {
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$progress = new ProgressBar($output);
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$progress->start();
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foreach($this->userManager->getBackends() as $backend) {
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$limit = 500;
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$offset = 0;
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do {
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$users = $backend->getUsers('', $limit, $offset);
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foreach ($users as $user) {
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$progress->advance();
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$this->setupUserFS($user);
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$this->moveUserEncryptionFolder($user, $oldRoot, $newRoot);
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}
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$offset += $limit;
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} while(count($users) >= $limit);
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}
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$progress->finish();
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}
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/**
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* move user encryption folder to new root folder
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*
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* @param string $user
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* @param string $oldRoot
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* @param string $newRoot
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* @throws \Exception
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*/
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protected function moveUserEncryptionFolder($user, $oldRoot, $newRoot) {
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if ($this->userManager->userExists($user)) {
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$source = $oldRoot . '/' . $user . '/files_encryption';
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$target = $newRoot . '/' . $user . '/files_encryption';
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if (
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$this->rootView->is_dir($source) &&
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$this->targetExists($target) === false
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) {
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$this->prepareParentFolder($newRoot . '/' . $user);
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$this->rootView->rename($source, $target);
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}
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}
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}
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/**
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* Make preparations to filesystem for saving a key file
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*
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* @param string $path relative to data/
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*/
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protected function prepareParentFolder($path) {
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$path = Filesystem::normalizePath($path);
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// If the file resides within a subdirectory, create it
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if ($this->rootView->file_exists($path) === false) {
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$sub_dirs = explode('/', ltrim($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->rootView->file_exists($dir) === false) {
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$this->rootView->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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* check if target already exists
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*
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* @param $path
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* @return bool
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* @throws \Exception
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*/
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protected function targetExists($path) {
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if ($this->rootView->file_exists($path)) {
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throw new \Exception("new folder '$path' already exists");
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}
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return false;
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}
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}
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