nextcloud/lib/private/installer.php

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<?php
/**
* ownCloud
*
* @author Robin Appelman
2012-05-26 21:14:24 +04:00
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* @author Georg Ehrke
* @copytight 2014 Georg Ehrke georg@ownCloud.com
*
* 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/>.
*
*/
/**
* This class provides the functionality needed to install, update and remove plugins/apps
*/
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class OC_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()) {
$l = \OC_L10N::get('lib');
list($extractDir, $path) = self::downloadApp($data);
$info = self::checkAppsIntegrity($data, $extractDir, $path);
$basedir=OC_App::getInstallPath().'/'.$info['id'];
//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 .= '/' . $info['id'];
OC_Helper::copyr($extractDir, $basedir);
//remove temporary files
OC_Helper::rmdirr($extractDir);
//install the database
if(is_file($basedir.'/appinfo/database.xml')) {
if (OC_Appconfig::getValue($info['id'], 'installed_version') === null) {
OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
} else {
OC_DB::updateDbFromStructure($basedir.'/appinfo/database.xml');
}
}
//run appinfo/install.php
if((!isset($data['noinstall']) or $data['noinstall']==false) and file_exists($basedir.'/appinfo/install.php')) {
include $basedir.'/appinfo/install.php';
}
//set the installed version
OC_Appconfig::setValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id']));
OC_Appconfig::setValue($info['id'], 'enabled', 'no');
//set remote/public handelers
foreach($info['remote'] as $name=>$path) {
OCP\CONFIG::setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
}
foreach($info['public'] as $name=>$path) {
OCP\CONFIG::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.
*/
public static function isInstalled( $app ) {
return (OC_Appconfig::getValue($app, "installed_version") !== null);
}
/**
* @brief Update an application
*
* This function installs an app. All information needed are passed in the
* associative array $data.
* The following keys are required:
* - source: string, can be "path" or "http"
*
* One of the following keys is required:
* - path: path to the file containing the app
* - href: link to the downloadable file containing the app
*
* The following keys are optional:
* - pretend: boolean, if set true the system won't do anything
* - noupgrade: boolean, if true appinfo/upgrade.php won't be loaded
*
* This function works as follows
* -# fetching the file
* -# removing the old files
* -# unzipping new file
* -# including appinfo/upgrade.php
* -# setting the installed version
*
* upgrade.php can determine the current installed version of the app using
* "OC_Appconfig::getValue($appid, 'installed_version')"
*/
public static function updateApp( $app ) {
$appdata = OC_OCSClient::getApplication($app);
$download = OC_OCSClient::getApplicationDownload($app, 1);
if (isset($download['downloadlink']) && trim($download['downloadlink']) !== '') {
$download['downloadlink'] = str_replace(' ', '%20', $download['downloadlink']);
$info = array(
'source' => 'http',
'href' => $download['downloadlink'],
'appdata' => $appdata
);
} else {
throw new \Exception('Could not fetch app info!');
}
list($extractDir, $path) = self::downloadApp($info);
$info = self::checkAppsIntegrity($info, $extractDir, $path);
$currentDir = OC_App::getAppPath($info['id']);
$basedir = OC_App::getInstallPath();
$basedir .= '/';
$basedir .= $info['id'];
if($currentDir !== null && 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']);
}
/**
* @param array $data
* @return array
* @throws Exception
*/
public static function downloadApp($data = array()) {
$l = \OC_L10N::get('lib');
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if(!isset($data['source'])) {
throw new \Exception($l->t("No source specified when installing app"));
}
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//download the file if necesary
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if($data['source']=='http') {
$path=OC_Helper::tmpFile();
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if(!isset($data['href'])) {
throw new \Exception($l->t("No href specified when installing app from http"));
}
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copy($data['href'], $path);
}else{
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if(!isset($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
$mime=OC_Helper::getMimeType($path);
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if($mime=='application/zip') {
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rename($path, $path.'.zip');
$path.='.zip';
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}elseif($mime=='application/x-gzip') {
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rename($path, $path.'.tgz');
$path.='.tgz';
}else{
throw new \Exception($l->t("Archives of type %s are not supported", array($mime)));
}
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//extract the archive in a temporary folder
$extractDir=OC_Helper::tmpFolder();
OC_Helper::rmdirr($extractDir);
mkdir($extractDir);
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if($archive=OC_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 $extractDir
* @return array
* @throws \Exception
*/
public static function checkAppsIntegrity($data = array(), $extractDir, $path) {
$l = \OC_L10N::get('lib');
//load the info.xml file of the app
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if(!is_file($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);
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if($data['source']=='http') {
unlink($path);
}
throw new \Exception($l->t("App does not provide an info.xml file"));
}
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$info=OC_App::getAppInfo($extractDir.'/appinfo/info.xml', true);
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// check the code for not allowed calls
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if(!OC_Installer::checkCode($info['id'], $extractDir)) {
OC_Helper::rmdirr($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(OC_Util::getVersion(), $info)) {
OC_Helper::rmdirr($extractDir);
throw new \Exception($l->t("App can't be installed because it is not compatible with this version of ownCloud"));
}
// check if shipped tag is set which is only allowed for apps that are shipped with ownCloud
if(isset($info['shipped']) and ($info['shipped']=='true')) {
OC_Helper::rmdirr($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
$versionFile= $extractDir.'/appinfo/version';
if(is_file($versionFile)) {
$version = trim(file_get_contents($versionFile));
}else{
$version = trim($info['version']);
}
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if($version<>trim($data['appdata']['version'])) {
OC_Helper::rmdirr($extractDir);
throw new \Exception($l->t("App can't be installed because the version in info.xml/version 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 ) {
$ocsid=OC_Appconfig::getValue( $app, 'ocsid', '');
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if($ocsid<>'') {
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$ocsdata=OC_OCSClient::getApplication($ocsid);
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$ocsversion= (string) $ocsdata['version'];
$currentversion=OC_App::getAppVersion($app);
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if($ocsversion<>$currentversion) {
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return($ocsversion);
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}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( $name ) {
foreach(OC::$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
* @param array $options options
* @return boolean
*
* This function removes an app. $options is an associative array. The
* following keys are optional:ja
* - keeppreferences: boolean, if true the user preferences won't be deleted
* - keepappconfig: boolean, if true the config will be kept
* - keeptables: boolean, if true the database will be kept
* - keepfiles: boolean, if true the user files will be kept
*
* This function works as follows
* -# including appinfo/remove.php
* -# removing the files
*
* The function will not delete preferences, tables and the configuration,
* this has to be done by the function oc_app_uninstall().
*/
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public static function removeApp( $name, $options = array()) {
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if(isset($options['keeppreferences']) and $options['keeppreferences']==false ) {
// todo
// remove preferences
}
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if(isset($options['keepappconfig']) and $options['keepappconfig']==false ) {
// todo
// remove app config
}
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if(isset($options['keeptables']) and $options['keeptables']==false ) {
// todo
// remove app database tables
}
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if(isset($options['keepfiles']) and $options['keepfiles']==false ) {
// todo
// remove user files
}
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if(OC_Installer::isDownloaded( $name )) {
$appdir=OC_App::getInstallPath().'/'.$name;
OC_Helper::rmdirr($appdir);
return true;
}else{
OC_Log::write('core', 'can\'t remove app '.$name.'. It is not installed.', OC_Log::ERROR);
return false;
}
}
/**
* Installs shipped apps
*
* This function installs all apps found in the 'apps' directory that should be enabled by default;
*/
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public static function installShippedApps() {
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/app.php" )) {
if(!OC_Installer::isInstalled($filename)) {
$info=OC_App::getAppInfo($filename);
$enabled = isset($info['default_enable']);
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if( $enabled ) {
OC_Installer::installShippedApp($filename);
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OC_Appconfig::setValue($filename, 'enabled', 'yes');
}
}
}
}
}
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closedir( $dir );
}
}
}
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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
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if(is_file(OC_App::getAppPath($app)."/appinfo/database.xml")) {
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OC_DB::createDbFromStructure(OC_App::getAppPath($app)."/appinfo/database.xml");
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}
//run appinfo/install.php
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if(is_file(OC_App::getAppPath($app)."/appinfo/install.php")) {
include OC_App::getAppPath($app)."/appinfo/install.php";
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}
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$info=OC_App::getAppInfo($app);
if (is_null($info)) {
return false;
}
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OC_Appconfig::setValue($app, 'installed_version', OC_App::getAppVersion($app));
if (array_key_exists('ocsid', $info)) {
OC_Appconfig::setValue($app, 'ocsid', $info['ocsid']);
}
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//set remote/public handelers
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foreach($info['remote'] as $name=>$path) {
OCP\CONFIG::setAppValue('core', 'remote_'.$name, $app.'/'.$path);
}
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foreach($info['public'] as $name=>$path) {
OCP\CONFIG::setAppValue('core', 'public_'.$name, $app.'/'.$path);
}
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OC_App::setAppTypes($info['id']);
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return $info['id'];
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}
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/**
* check the code of an app with some static code checks
* @param string $folder the folder of the app to check
* @return boolean true for app is o.k. and false for app is not o.k.
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*/
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public static function checkCode($appname, $folder) {
return true;
$blacklist=array(
'exec(',
'eval(',
// more evil pattern will go here later
// classes replaced by the public api
'OC_API::',
'OC_App::',
'OC_AppConfig::',
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'OC_Avatar',
'OC_BackgroundJob::',
'OC_Config::',
'OC_DB::',
'OC_Files::',
'OC_Helper::',
'OC_Hook::',
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'OC_Image::',
'OC_JSON::',
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'OC_L10N::',
'OC_Log::',
'OC_Mail::',
'OC_Preferences::',
'OC_Request::',
'OC_Response::',
'OC_Template::',
'OC_User::',
'OC_Util::',
);
// is the code checker enabled?
if(OC_Config::getValue('appcodechecker', true)) {
// check if grep is installed
$grep = exec('command -v grep');
if($grep=='') {
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OC_Log::write('core',
'grep not installed. So checking the code of the app "'.$appname.'" was not possible',
OC_Log::ERROR);
return true;
}
// iterate the bad patterns
foreach($blacklist as $bl) {
$cmd = 'grep -ri '.escapeshellarg($bl).' '.$folder.'';
$result = exec($cmd);
// bad pattern found
if($result<>'') {
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OC_Log::write('core',
'App "'.$appname.'" is using a not allowed call "'.$bl.'". Installation refused.',
OC_Log::ERROR);
return false;
}
}
return true;
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}else{
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return true;
}
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}
}