nextcloud/lib/private/Installer.php

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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Brice Maron <brice@bmaron.net>
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* @author Christian Weiske <cweiske@cweiske.de>
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* @author Christopher Schäpers <kondou@ts.unde.re>
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* @author Frank Karlitschek <frank@karlitschek.de>
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* @author Georg Ehrke <georg@owncloud.com>
* @author Jakob Sack <mail@jakobsack.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Kamil Domanski <kdomanski@kdemail.net>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author michag86 <micha_g@arcor.de>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author root <root@oc.(none)>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
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* @license AGPL-3.0
*
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* 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.
*
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* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
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* 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/>
*
*/
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namespace OC;
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use OC\App\CodeChecker\CodeChecker;
use OC\App\CodeChecker\EmptyCheck;
use OC\App\CodeChecker\PrivateCheck;
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use OC_App;
use OC_DB;
use OC_Helper;
/**
* This class provides the functionality needed to install, update and remove plugins/apps
*/
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class Installer {
/**
*
* This function installs an app. All information needed are passed in the
* associative array $data.
* The following keys are required:
* - source: string, can be "path" or "http"
*
* One of the following keys is required:
* - path: path to the file containing the app
* - href: link to the downloadable file containing the app
*
* The following keys are optional:
* - pretend: boolean, if set true the system won't do anything
* - noinstall: boolean, if true appinfo/install.php won't be loaded
* - inactive: boolean, if set true the appconfig/app.sample.php won't be
* renamed
*
* This function works as follows
* -# fetching the file
* -# unzipping it
* -# check the code
* -# installing the database at appinfo/database.xml
* -# including appinfo/install.php
* -# setting the installed version
*
* It is the task of oc_app_install to create the tables and do whatever is
* needed to get the app working.
*
* Installs an app
* @param array $data with all information
* @throws \Exception
* @return integer
*/
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public static function installApp( $data = array()) {
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$l = \OC::$server->getL10N('lib');
list($extractDir, $path) = self::downloadApp($data);
$info = self::checkAppsIntegrity($data, $extractDir, $path);
$appId = OC_App::cleanAppId($info['id']);
$basedir = OC_App::getInstallPath().'/'.$appId;
//check if the destination directory already exists
if(is_dir($basedir)) {
OC_Helper::rmdirr($extractDir);
if($data['source']=='http') {
unlink($path);
}
throw new \Exception($l->t("App directory already exists"));
}
if(!empty($data['pretent'])) {
return false;
}
//copy the app to the correct place
if(@!mkdir($basedir)) {
OC_Helper::rmdirr($extractDir);
if($data['source']=='http') {
unlink($path);
}
throw new \Exception($l->t("Can't create app folder. Please fix permissions. %s", array($basedir)));
}
$extractDir .= '/' . $info['id'];
if(!file_exists($extractDir)) {
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OC_Helper::rmdirr($basedir);
throw new \Exception($l->t("Archive does not contain a directory named %s", $info['id']));
}
OC_Helper::copyr($extractDir, $basedir);
//remove temporary files
OC_Helper::rmdirr($extractDir);
//install the database
if(is_file($basedir.'/appinfo/database.xml')) {
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if (\OC::$server->getAppConfig()->getValue($info['id'], 'installed_version') === null) {
OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
} else {
OC_DB::updateDbFromStructure($basedir.'/appinfo/database.xml');
}
}
\OC_App::setupBackgroundJobs($info['background-jobs']);
//run appinfo/install.php
if((!isset($data['noinstall']) or $data['noinstall']==false)) {
self::includeAppScript($basedir . '/appinfo/install.php');
}
$appData = OC_App::getAppInfo($appId);
OC_App::executeRepairSteps($appId, $appData['repair-steps']['install']);
//set the installed version
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\OC::$server->getConfig()->setAppValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id']));
\OC::$server->getConfig()->setAppValue($info['id'], 'enabled', 'no');
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//set remote/public handlers
foreach($info['remote'] as $name=>$path) {
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\OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
}
foreach($info['public'] as $name=>$path) {
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\OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
}
OC_App::setAppTypes($info['id']);
return $info['id'];
}
/**
* @brief checks whether or not an app is installed
* @param string $app app
* @returns bool
*
* Checks whether or not an app is installed, i.e. registered in apps table.
*/
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public static function isInstalled( $app ) {
return (\OC::$server->getConfig()->getAppValue($app, "installed_version", null) !== null);
}
/**
* @brief Update an application
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* @param array $info
* @param bool $isShipped
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* @throws \Exception
* @return bool
*
* This function could work like described below, but currently it disables and then
* enables the app again. This does result in an updated app.
*
*
* This function installs an app. All information needed are passed in the
* associative array $info.
* The following keys are required:
* - source: string, can be "path" or "http"
*
* One of the following keys is required:
* - path: path to the file containing the app
* - href: link to the downloadable file containing the app
*
* The following keys are optional:
* - pretend: boolean, if set true the system won't do anything
* - noupgrade: boolean, if true appinfo/upgrade.php won't be loaded
*
* This function works as follows
* -# fetching the file
* -# removing the old files
* -# unzipping new file
* -# including appinfo/upgrade.php
* -# setting the installed version
*
* upgrade.php can determine the current installed version of the app using
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* "\OC::$server->getAppConfig()->getValue($appid, 'installed_version')"
*/
public static function updateApp($info=array(), $isShipped=false) {
list($extractDir, $path) = self::downloadApp($info);
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$info = self::checkAppsIntegrity($info, $extractDir, $path, $isShipped);
$currentDir = OC_App::getAppPath($info['id']);
$basedir = OC_App::getInstallPath();
$basedir .= '/';
$basedir .= $info['id'];
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if($currentDir !== false && is_writable($currentDir)) {
$basedir = $currentDir;
}
if(is_dir($basedir)) {
OC_Helper::rmdirr($basedir);
}
$appInExtractDir = $extractDir;
if (substr($extractDir, -1) !== '/') {
$appInExtractDir .= '/';
}
$appInExtractDir .= $info['id'];
OC_Helper::copyr($appInExtractDir, $basedir);
OC_Helper::rmdirr($extractDir);
return OC_App::updateApp($info['id']);
}
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/**
* update an app by it's id
*
* @param integer $ocsId
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* @return bool
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* @throws \Exception
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*/
public static function updateAppByOCSId($ocsId) {
$ocsClient = new OCSClient(
\OC::$server->getHTTPClientService(),
\OC::$server->getConfig(),
\OC::$server->getLogger()
);
$appData = $ocsClient->getApplication($ocsId, \OCP\Util::getVersion());
$download = $ocsClient->getApplicationDownload($ocsId, \OCP\Util::getVersion());
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if (isset($download['downloadlink']) && trim($download['downloadlink']) !== '') {
$download['downloadlink'] = str_replace(' ', '%20', $download['downloadlink']);
$info = array(
'source' => 'http',
'href' => $download['downloadlink'],
'appdata' => $appData
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);
} else {
throw new \Exception('Could not fetch app info!');
}
return self::updateApp($info);
}
/**
* @param array $data
* @return array
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* @throws \Exception
*/
public static function downloadApp($data = array()) {
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$l = \OC::$server->getL10N('lib');
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if(!isset($data['source'])) {
throw new \Exception($l->t("No source specified when installing app"));
}
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//download the file if necessary
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if($data['source']=='http') {
$pathInfo = pathinfo($data['href']);
$extension = isset($pathInfo['extension']) ? '.' . $pathInfo['extension'] : '';
$path = \OC::$server->getTempManager()->getTemporaryFile($extension);
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if(!isset($data['href'])) {
throw new \Exception($l->t("No href specified when installing app from http"));
}
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$client = \OC::$server->getHTTPClientService()->newClient();
$client->get($data['href'], ['save_to' => $path]);
} else {
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if(!isset($data['path'])) {
throw new \Exception($l->t("No path specified when installing app from local file"));
}
$path=$data['path'];
}
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//detect the archive type
$mime = \OC::$server->getMimeTypeDetector()->detect($path);
if ($mime !=='application/zip' && $mime !== 'application/x-gzip' && $mime !== 'application/x-bzip2') {
throw new \Exception($l->t("Archives of type %s are not supported", array($mime)));
}
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//extract the archive in a temporary folder
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$extractDir = \OC::$server->getTempManager()->getTemporaryFolder();
OC_Helper::rmdirr($extractDir);
mkdir($extractDir);
if($archive=\OC\Archive\Archive::open($path)) {
$archive->extract($extractDir);
} else {
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
unlink($path);
}
throw new \Exception($l->t("Failed to open archive when installing app"));
}
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return array(
$extractDir,
$path
);
}
/**
* check an app's integrity
* @param array $data
* @param string $extractDir
* @param string $path
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* @param bool $isShipped
* @return array
* @throws \Exception
*/
public static function checkAppsIntegrity($data, $extractDir, $path, $isShipped = false) {
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$l = \OC::$server->getL10N('lib');
//load the info.xml file of the app
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if(!is_file($extractDir.'/appinfo/info.xml')) {
//try to find it in a subdir
$dh=opendir($extractDir);
if(is_resource($dh)) {
while (($folder = readdir($dh)) !== false) {
if($folder[0]!='.' and is_dir($extractDir.'/'.$folder)) {
if(is_file($extractDir.'/'.$folder.'/appinfo/info.xml')) {
$extractDir.='/'.$folder;
}
}
}
}
}
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if(!is_file($extractDir.'/appinfo/info.xml')) {
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OC_Helper::rmdirr($extractDir);
if($data['source'] === 'http') {
unlink($path);
}
throw new \Exception($l->t("App does not provide an info.xml file"));
}
$info = OC_App::getAppInfo($extractDir.'/appinfo/info.xml', true);
if(!is_array($info)) {
throw new \Exception($l->t('App cannot be installed because appinfo file cannot be read.'));
}
// We can't trust the parsed info.xml file as it may have been tampered
// with by an attacker and thus we need to use the local data to check
// whether the application needs to be signed.
$appId = OC_App::cleanAppId($data['appdata']['id']);
$appBelongingToId = OC_App::getInternalAppIdByOcs($appId);
if(is_string($appBelongingToId)) {
$previouslySigned = \OC::$server->getConfig()->getAppValue($appBelongingToId, 'signed', 'false');
} else {
$appBelongingToId = $info['id'];
$previouslySigned = 'false';
}
if($data['appdata']['level'] === OC_App::officialApp || $previouslySigned === 'true') {
\OC::$server->getConfig()->setAppValue($appBelongingToId, 'signed', 'true');
$integrityResult = \OC::$server->getIntegrityCodeChecker()->verifyAppSignature(
$appBelongingToId,
$extractDir
);
if($integrityResult !== []) {
$e = new \Exception(
$l->t(
'Signature could not get checked. Please contact the app developer and check your admin screen.'
)
);
throw $e;
}
}
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// check the code for not allowed calls
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if(!$isShipped && !Installer::checkCode($extractDir)) {
OC_Helper::rmdirr($extractDir);
throw new \Exception($l->t("App can't be installed because of not allowed code in the App"));
}
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// check if the app is compatible with this version of ownCloud
if(!OC_App::isAppCompatible(\OCP\Util::getVersion(), $info)) {
OC_Helper::rmdirr($extractDir);
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throw new \Exception($l->t("App can't be installed because it is not compatible with this version of the server"));
}
// check if shipped tag is set which is only allowed for apps that are shipped with ownCloud
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if(!$isShipped && isset($info['shipped']) && ($info['shipped']=='true')) {
OC_Helper::rmdirr($extractDir);
throw new \Exception($l->t("App can't be installed because it contains the <shipped>true</shipped> tag which is not allowed for non shipped apps"));
}
// check if the ocs version is the same as the version in info.xml/version
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$version = trim($info['version']);
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if(isset($data['appdata']['version']) && $version<>trim($data['appdata']['version'])) {
OC_Helper::rmdirr($extractDir);
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throw new \Exception($l->t("App can't be installed because the version in info.xml is not the same as the version reported from the app store"));
}
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return $info;
}
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/**
* Check if an update for the app is available
* @param string $app
* @return string|false false or the version number of the update
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*
* The function will check if an update for a version is available
*/
public static function isUpdateAvailable( $app ) {
static $isInstanceReadyForUpdates = null;
if ($isInstanceReadyForUpdates === null) {
$installPath = OC_App::getInstallPath();
if ($installPath === false || $installPath === null) {
$isInstanceReadyForUpdates = false;
} else {
$isInstanceReadyForUpdates = true;
}
}
if ($isInstanceReadyForUpdates === false) {
return false;
}
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$ocsid=\OC::$server->getAppConfig()->getValue( $app, 'ocsid', '');
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if($ocsid<>'') {
$ocsClient = new OCSClient(
\OC::$server->getHTTPClientService(),
\OC::$server->getConfig(),
\OC::$server->getLogger()
);
$ocsdata = $ocsClient->getApplication($ocsid, \OCP\Util::getVersion());
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$ocsversion= (string) $ocsdata['version'];
$currentversion=OC_App::getAppVersion($app);
if (version_compare($ocsversion, $currentversion, '>')) {
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return($ocsversion);
}else{
return false;
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}
}else{
return false;
}
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}
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/**
* Check if app is already downloaded
* @param string $name name of the application to remove
* @return boolean
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*
* The function will check if the app is already downloaded in the apps repository
*/
public static function isDownloaded( $name ) {
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foreach(\OC::$APPSROOTS as $dir) {
$dirToTest = $dir['path'];
$dirToTest .= '/';
$dirToTest .= $name;
$dirToTest .= '/';
if (is_dir($dirToTest)) {
return true;
}
}
return false;
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}
/**
* Removes an app
* @param string $name name of the application to remove
* @return boolean
*
*
* This function works as follows
* -# call uninstall repair steps
* -# removing the files
*
* The function will not delete preferences, tables and the configuration,
* this has to be done by the function oc_app_uninstall().
*/
public static function removeApp($appId) {
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if(Installer::isDownloaded( $appId )) {
$appDir=OC_App::getInstallPath() . '/' . $appId;
OC_Helper::rmdirr($appDir);
return true;
}else{
\OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
return false;
}
}
/**
* Installs shipped apps
*
* This function installs all apps found in the 'apps' directory that should be enabled by default;
* @param bool $softErrors When updating we ignore errors and simply log them, better to have a
* working ownCloud at the end instead of an aborted update.
* @return array Array of error messages (appid => Exception)
*/
public static function installShippedApps($softErrors = false) {
$errors = [];
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foreach(\OC::$APPSROOTS as $app_dir) {
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if($dir = opendir( $app_dir['path'] )) {
while( false !== ( $filename = readdir( $dir ))) {
if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
if( file_exists( $app_dir['path']."/$filename/appinfo/info.xml" )) {
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if(!Installer::isInstalled($filename)) {
$info=OC_App::getAppInfo($filename);
$enabled = isset($info['default_enable']);
if (($enabled || in_array($filename, \OC::$server->getAppManager()->getAlwaysEnabledApps()))
&& \OC::$server->getConfig()->getAppValue($filename, 'enabled') !== 'no') {
if ($softErrors) {
try {
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Installer::installShippedApp($filename);
} catch (\Doctrine\DBAL\Exception\TableExistsException $e) {
$errors[$filename] = $e;
continue;
}
} else {
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Installer::installShippedApp($filename);
}
\OC::$server->getConfig()->setAppValue($filename, 'enabled', 'yes');
}
}
}
}
}
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closedir( $dir );
}
}
return $errors;
}
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/**
* install an app already placed in the app folder
* @param string $app id of the app to install
* @return integer
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*/
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public static function installShippedApp($app) {
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//install the database
$appPath = OC_App::getAppPath($app);
if(is_file("$appPath/appinfo/database.xml")) {
OC_DB::createDbFromStructure("$appPath/appinfo/database.xml");
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}
//run appinfo/install.php
\OC_App::registerAutoloading($app, $appPath);
self::includeAppScript("$appPath/appinfo/install.php");
$info = OC_App::getAppInfo($app);
if (is_null($info)) {
return false;
}
\OC_App::setupBackgroundJobs($info['background-jobs']);
OC_App::executeRepairSteps($app, $info['repair-steps']['install']);
$config = \OC::$server->getConfig();
$config->setAppValue($app, 'installed_version', OC_App::getAppVersion($app));
if (array_key_exists('ocsid', $info)) {
$config->setAppValue($app, 'ocsid', $info['ocsid']);
}
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//set remote/public handlers
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foreach($info['remote'] as $name=>$path) {
$config->setAppValue('core', 'remote_'.$name, $app.'/'.$path);
}
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foreach($info['public'] as $name=>$path) {
$config->setAppValue('core', 'public_'.$name, $app.'/'.$path);
}
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OC_App::setAppTypes($info['id']);
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if(isset($info['settings']) && is_array($info['settings'])) {
// requires that autoloading was registered for the app,
// as happens before running the install.php some lines above
\OC::$server->getSettingsManager()->setupSettings($info['settings']);
}
return $info['id'];
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}
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/**
* check the code of an app with some static code checks
* @param string $folder the folder of the app to check
* @return boolean true for app is o.k. and false for app is not o.k.
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*/
public static function checkCode($folder) {
// is the code checker enabled?
if(!\OC::$server->getConfig()->getSystemValue('appcodechecker', false)) {
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return true;
}
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$codeChecker = new CodeChecker(new PrivateCheck(new EmptyCheck()));
$errors = $codeChecker->analyseFolder(basename($folder), $folder);
return empty($errors);
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}
/**
* @param $basedir
*/
private static function includeAppScript($script) {
if ( file_exists($script) ){
include $script;
}
}
}