383 lines
12 KiB
PHP
383 lines
12 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Robin Appelman
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library 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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* This class provides the functionality needed to install, update and remove plugins/apps
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*/
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class OC_Installer{
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/**
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* @brief Installs an app
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* @param $data array with all information
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* @returns integer
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*
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* This function installs an app. All information needed are passed in the
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* associative array $data.
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* The following keys are required:
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* - source: string, can be "path" or "http"
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*
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* One of the following keys is required:
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* - path: path to the file containing the app
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* - href: link to the downloadable file containing the app
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*
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* The following keys are optional:
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* - pretend: boolean, if set true the system won't do anything
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* - noinstall: boolean, if true appinfo/install.php won't be loaded
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* - inactive: boolean, if set true the appconfig/app.sample.php won't be
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* renamed
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*
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* This function works as follows
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* -# fetching the file
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* -# unzipping it
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* -# check the code
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* -# installing the database at appinfo/database.xml
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* -# including appinfo/install.php
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* -# setting the installed version
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*
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* It is the task of oc_app_install to create the tables and do whatever is
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* needed to get the app working.
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*/
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public static function installApp( $data = array()) {
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if(!isset($data['source'])) {
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OC_Log::write('core','No source specified when installing app', OC_Log::ERROR);
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return false;
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}
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//download the file if necesary
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if($data['source']=='http') {
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$path=OC_Helper::tmpFile();
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if(!isset($data['href'])) {
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OC_Log::write('core','No href specified when installing app from http', OC_Log::ERROR);
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return false;
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}
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copy($data['href'], $path);
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}else{
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if(!isset($data['path'])) {
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OC_Log::write('core','No path specified when installing app from local file', OC_Log::ERROR);
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return false;
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}
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$path=$data['path'];
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}
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//detect the archive type
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$mime=OC_Helper::getMimeType($path);
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if($mime=='application/zip') {
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rename($path, $path.'.zip');
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$path.='.zip';
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}elseif($mime=='application/x-gzip') {
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rename($path, $path.'.tgz');
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$path.='.tgz';
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}else{
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OC_Log::write('core','Archives of type '.$mime.' are not supported', OC_Log::ERROR);
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return false;
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}
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//extract the archive in a temporary folder
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$extractDir=OC_Helper::tmpFolder();
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OC_Helper::rmdirr($extractDir);
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mkdir($extractDir);
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if($archive=OC_Archive::open($path)) {
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$archive->extract($extractDir);
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} else {
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OC_Log::write('core', 'Failed to open archive when installing app', OC_Log::ERROR);
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
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unlink($path);
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}
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return false;
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}
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//load the info.xml file of the app
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if(!is_file($extractDir.'/appinfo/info.xml')) {
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//try to find it in a subdir
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$dh=opendir($extractDir);
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while($folder=readdir($dh)) {
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if($folder[0]!='.' and is_dir($extractDir.'/'.$folder)) {
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if(is_file($extractDir.'/'.$folder.'/appinfo/info.xml')) {
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$extractDir.='/'.$folder;
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}
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}
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}
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}
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if(!is_file($extractDir.'/appinfo/info.xml')) {
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OC_Log::write('core', 'App does not provide an info.xml file', OC_Log::ERROR);
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
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unlink($path);
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}
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return false;
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}
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$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'], $extractDir)) {
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OC_Log::write('core', 'App can\'t be installed because of not allowed code in the App', OC_Log::ERROR);
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OC_Helper::rmdirr($extractDir);
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return false;
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}
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// check if the app is compatible with this version of ownCloud
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$version=OC_Util::getVersion();
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if(!isset($info['require']) or ($version[0]>$info['require'])) {
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OC_Log::write('core', 'App can\'t be installed because it is not compatible with this version of ownCloud', OC_Log::ERROR);
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OC_Helper::rmdirr($extractDir);
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return false;
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}
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//check if an app with the same id is already installed
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if(self::isInstalled( $info['id'] )) {
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OC_Log::write('core', 'App already installed', OC_Log::WARN);
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
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unlink($path);
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}
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return false;
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}
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$basedir=OC_App::getInstallPath().'/'.$info['id'];
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//check if the destination directory already exists
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if(is_dir($basedir)) {
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OC_Log::write('core', 'App directory already exists', OC_Log::WARN);
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
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unlink($path);
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}
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return false;
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}
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if(isset($data['pretent']) and $data['pretent']==true) {
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return false;
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}
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//copy the app to the correct place
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if(@!mkdir($basedir)) {
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OC_Log::write('core', 'Can\'t create app folder. Please fix permissions. ('.$basedir.')', OC_Log::ERROR);
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OC_Helper::rmdirr($extractDir);
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if($data['source']=='http') {
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unlink($path);
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}
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return false;
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}
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OC_Helper::copyr($extractDir, $basedir);
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//remove temporary files
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OC_Helper::rmdirr($extractDir);
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//install the database
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if(is_file($basedir.'/appinfo/database.xml')) {
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OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
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}
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//run appinfo/install.php
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if((!isset($data['noinstall']) or $data['noinstall']==false) and file_exists($basedir.'/appinfo/install.php')) {
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include $basedir.'/appinfo/install.php';
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}
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//set the installed version
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OC_Appconfig::setValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id']));
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OC_Appconfig::setValue($info['id'], 'enabled', 'no');
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//set remote/public handelers
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foreach($info['remote'] as $name=>$path) {
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OCP\CONFIG::setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
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}
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foreach($info['public'] as $name=>$path) {
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OCP\CONFIG::setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
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}
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OC_App::setAppTypes($info['id']);
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return $info['id'];
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}
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/**
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* @brief checks whether or not an app is installed
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* @param $app app
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* @returns true/false
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*
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* Checks whether or not an app is installed, i.e. registered in apps table.
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*/
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public static function isInstalled( $app ) {
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if( null == OC_Appconfig::getValue( $app, "installed_version" )) {
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return false;
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}
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return true;
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}
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/**
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* @brief Update an application
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* @param $data array with all information
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* @returns integer
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*
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* This function installs an app. All information needed are passed in the
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* associative array $data.
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* The following keys are required:
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* - source: string, can be "path" or "http"
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*
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* One of the following keys is required:
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* - path: path to the file containing the app
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* - href: link to the downloadable file containing the app
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*
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* The following keys are optional:
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* - pretend: boolean, if set true the system won't do anything
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* - noupgrade: boolean, if true appinfo/upgrade.php won't be loaded
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*
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* This function works as follows
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* -# fetching the file
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* -# removing the old files
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* -# unzipping new file
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* -# including appinfo/upgrade.php
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* -# setting the installed version
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*
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* upgrade.php can determine the current installed version of the app using "OC_Appconfig::getValue($appid, 'installed_version')"
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*/
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public static function upgradeApp( $data = array()) {
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// TODO: write function
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return true;
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}
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/**
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* @brief Removes an app
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* @param $name name of the application to remove
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* @param $options array with options
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* @returns true/false
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*
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* This function removes an app. $options is an associative array. The
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* following keys are optional:ja
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* - keeppreferences: boolean, if true the user preferences won't be deleted
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* - keepappconfig: boolean, if true the config will be kept
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* - keeptables: boolean, if true the database will be kept
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* - keepfiles: boolean, if true the user files will be kept
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*
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* This function works as follows
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* -# including appinfo/remove.php
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* -# removing the files
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*
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* The function will not delete preferences, tables and the configuration,
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* this has to be done by the function oc_app_uninstall().
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*/
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public static function removeApp( $name, $options = array()) {
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// TODO: write function
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return true;
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}
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/**
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* @brief Installs shipped apps
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*
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* This function installs all apps found in the 'apps' directory that should be enabled by default;
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*/
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public static function installShippedApps() {
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foreach(OC::$APPSROOTS as $app_dir) {
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if($dir = opendir( $app_dir['path'] )) {
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while( false !== ( $filename = readdir( $dir ))) {
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if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
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if( file_exists( $app_dir['path']."/$filename/appinfo/app.php" )) {
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if(!OC_Installer::isInstalled($filename)) {
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$info=OC_App::getAppInfo($filename);
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$enabled = isset($info['default_enable']);
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if( $enabled ) {
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OC_Installer::installShippedApp($filename);
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OC_Appconfig::setValue($filename, 'enabled', 'yes');
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}
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}
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}
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}
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}
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closedir( $dir );
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}
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}
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}
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/**
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* install an app already placed in the app folder
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* @param string $app id of the app to install
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* @returns array see OC_App::getAppInfo
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*/
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public static function installShippedApp($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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}
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//run appinfo/install.php
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if(is_file(OC_App::getAppPath($app)."/appinfo/install.php")) {
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include OC_App::getAppPath($app)."/appinfo/install.php";
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}
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$info=OC_App::getAppInfo($app);
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OC_Appconfig::setValue($app, 'installed_version', OC_App::getAppVersion($app));
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//set remote/public handelers
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foreach($info['remote'] as $name=>$path) {
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OCP\CONFIG::setAppValue('core', 'remote_'.$name, $app.'/'.$path);
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}
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foreach($info['public'] as $name=>$path) {
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OCP\CONFIG::setAppValue('core', 'public_'.$name, $app.'/'.$path);
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}
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OC_App::setAppTypes($info['id']);
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return $info['id'];
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}
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/**
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* check the code of an app with some static code checks
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* @param string $folder the folder of the app to check
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* @returns true for app is o.k. and false for app is not o.k.
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*/
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public static function checkCode($appname, $folder) {
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$blacklist=array(
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'exec(',
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'eval('
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// more evil pattern will go here later
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// will will also check if an app is using private api once the public api is in place
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);
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// is the code checker enabled?
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if(OC_Config::getValue('appcodechecker', false)) {
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// check if grep is installed
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$grep = exec('which grep');
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if($grep=='') {
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OC_Log::write('core', 'grep not installed. So checking the code of the app "'.$appname.'" was not possible', OC_Log::ERROR);
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return true;
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}
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// iterate the bad patterns
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foreach($blacklist as $bl) {
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$cmd = 'grep -ri '.escapeshellarg($bl).' '.$folder.'';
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$result = exec($cmd);
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// bad pattern found
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if($result<>'') {
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OC_Log::write('core', 'App "'.$appname.'" is using a not allowed call "'.$bl.'". Installation refused.', OC_Log::ERROR);
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return false;
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}
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}
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return true;
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}else{
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return true;
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}
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}
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}
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