1177 lines
33 KiB
PHP
Executable file
1177 lines
33 KiB
PHP
Executable file
<?php
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/**
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* Class for utility functions
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*
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*/
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class OC_Util {
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public static $scripts=array();
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public static $styles=array();
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public static $headers=array();
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private static $rootMounted=false;
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private static $fsSetup=false;
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/**
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* @brief Can be set up
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* @param string $user
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* @return boolean
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* @description configure the initial filesystem based on the configuration
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*/
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public static function setupFS( $user = '' ) {
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//setting up the filesystem twice can only lead to trouble
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if(self::$fsSetup) {
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return false;
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}
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// If we are not forced to load a specific user we load the one that is logged in
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if( $user == "" && OC_User::isLoggedIn()) {
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$user = OC_User::getUser();
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}
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// load all filesystem apps before, so no setup-hook gets lost
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if(!isset($RUNTIME_NOAPPS) || !$RUNTIME_NOAPPS) {
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OC_App::loadApps(array('filesystem'));
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}
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// the filesystem will finish when $user is not empty,
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// mark fs setup here to avoid doing the setup from loading
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// OC_Filesystem
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if ($user != '') {
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self::$fsSetup=true;
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}
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$configDataDirectory = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
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//first set up the local "root" storage
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\OC\Files\Filesystem::initMounts();
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if(!self::$rootMounted) {
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\OC\Files\Filesystem::mount('\OC\Files\Storage\Local', array('datadir'=>$configDataDirectory), '/');
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self::$rootMounted = true;
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}
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if ($user != '' && !OCP\User::userExists($user)) {
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return false;
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}
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//if we aren't logged in, there is no use to set up the filesystem
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if( $user != "" ) {
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\OC\Files\Filesystem::addStorageWrapper(function($mountPoint, $storage){
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// set up quota for home storages, even for other users
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// which can happen when using sharing
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if ($storage instanceof \OC\Files\Storage\Home) {
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$user = $storage->getUser()->getUID();
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$quota = OC_Util::getUserQuota($user);
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if ($quota !== \OC\Files\SPACE_UNLIMITED) {
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return new \OC\Files\Storage\Wrapper\Quota(array('storage' => $storage, 'quota' => $quota, 'root' => 'files'));
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}
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}
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return $storage;
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});
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$userDir = '/'.$user.'/files';
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$userRoot = OC_User::getHome($user);
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$userDirectory = $userRoot . '/files';
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if( !is_dir( $userDirectory )) {
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mkdir( $userDirectory, 0755, true );
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OC_Util::copySkeleton($userDirectory);
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}
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//jail the user into his "home" directory
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\OC\Files\Filesystem::init($user, $userDir);
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$fileOperationProxy = new OC_FileProxy_FileOperations();
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OC_FileProxy::register($fileOperationProxy);
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OC_Hook::emit('OC_Filesystem', 'setup', array('user' => $user, 'user_dir' => $userDir));
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}
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return true;
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}
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/**
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* @param string $user
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*/
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public static function getUserQuota($user){
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$config = \OC::$server->getConfig();
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$userQuota = $config->getUserValue($user, 'files', 'quota', 'default');
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if($userQuota === 'default') {
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$userQuota = $config->getAppValue('files', 'default_quota', 'none');
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}
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if($userQuota === 'none') {
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return \OC\Files\SPACE_UNLIMITED;
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}else{
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return OC_Helper::computerFileSize($userQuota);
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}
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}
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/**
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* @brief copies the user skeleton files into the fresh user home files
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* @param string $userDirectory
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*/
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public static function copySkeleton($userDirectory) {
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OC_Util::copyr(\OC::$SERVERROOT.'/core/skeleton' , $userDirectory);
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}
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/**
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* @brief copies a directory recursively
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* @param string $source
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* @param string $target
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* @return void
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*/
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public static function copyr($source,$target) {
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$dir = opendir($source);
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@mkdir($target);
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while(false !== ( $file = readdir($dir)) ) {
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if ( !\OC\Files\Filesystem::isIgnoredDir($file) ) {
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if ( is_dir($source . '/' . $file) ) {
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OC_Util::copyr($source . '/' . $file , $target . '/' . $file);
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} else {
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copy($source . '/' . $file,$target . '/' . $file);
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}
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}
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}
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closedir($dir);
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}
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/**
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* @return void
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*/
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public static function tearDownFS() {
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\OC\Files\Filesystem::tearDown();
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self::$fsSetup=false;
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self::$rootMounted=false;
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}
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/**
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* @brief get the current installed version of ownCloud
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* @return array
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*/
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public static function getVersion() {
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OC_Util::loadVersion();
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return \OC::$server->getSession()->get('OC_Version');
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}
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/**
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* @brief get the current installed version string of ownCloud
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* @return string
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*/
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public static function getVersionString() {
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OC_Util::loadVersion();
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return \OC::$server->getSession()->get('OC_VersionString');
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}
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/**
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* @description get the current installed edition of ownCloud. There is the community
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* edition that just returns an empty string and the enterprise edition
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* that returns "Enterprise".
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* @return string
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*/
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public static function getEditionString() {
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OC_Util::loadVersion();
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return \OC::$server->getSession()->get('OC_Edition');
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}
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/**
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* @description get the update channel of the current installed of ownCloud.
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* @return string
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*/
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public static function getChannel() {
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OC_Util::loadVersion();
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return \OC::$server->getSession()->get('OC_Channel');
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}
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/**
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* @description get the build number of the current installed of ownCloud.
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* @return string
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*/
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public static function getBuild() {
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OC_Util::loadVersion();
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return \OC::$server->getSession()->get('OC_Build');
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}
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/**
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* @description load the version.php into the session as cache
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*/
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private static function loadVersion() {
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$timestamp = filemtime(OC::$SERVERROOT.'/version.php');
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if(!\OC::$server->getSession()->exists('OC_Version') or OC::$server->getSession()->get('OC_Version_Timestamp') != $timestamp) {
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require 'version.php';
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$session = \OC::$server->getSession();
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/** @var $timestamp int */
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$session->set('OC_Version_Timestamp', $timestamp);
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/** @var $OC_Version string */
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$session->set('OC_Version', $OC_Version);
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/** @var $OC_VersionString string */
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$session->set('OC_VersionString', $OC_VersionString);
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/** @var $OC_Edition string */
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$session->set('OC_Edition', $OC_Edition);
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/** @var $OC_Channel string */
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$session->set('OC_Channel', $OC_Channel);
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/** @var $OC_Build string */
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$session->set('OC_Build', $OC_Build);
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}
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}
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/**
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* @brief add a javascript file
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*
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* @param string $application
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* @param string|null $file filename
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* @return void
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*/
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public static function addScript( $application, $file = null ) {
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if ( is_null( $file )) {
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$file = $application;
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$application = "";
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}
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if ( !empty( $application )) {
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self::$scripts[] = "$application/js/$file";
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} else {
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self::$scripts[] = "js/$file";
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}
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}
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/**
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* @brief add a css file
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*
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* @param string $application
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* @param string|null $file filename
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* @return void
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*/
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public static function addStyle( $application, $file = null ) {
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if ( is_null( $file )) {
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$file = $application;
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$application = "";
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}
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if ( !empty( $application )) {
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self::$styles[] = "$application/css/$file";
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} else {
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self::$styles[] = "css/$file";
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}
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}
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/**
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* @brief Add a custom element to the header
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* @param string $tag tag name of the element
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* @param array $attributes array of attributes for the element
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* @param string $text the text content for the element
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* @return void
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*/
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public static function addHeader( $tag, $attributes, $text='') {
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self::$headers[] = array(
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'tag'=>$tag,
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'attributes'=>$attributes,
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'text'=>$text
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);
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}
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/**
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* @brief formats a timestamp in the "right" way
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*
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* @param int $timestamp
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* @param bool $dateOnly option to omit time from the result
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* @return string timestamp
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* @description adjust to clients timezone if we know it
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*/
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public static function formatDate( $timestamp, $dateOnly=false) {
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if(\OC::$session->exists('timezone')) {
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$systemTimeZone = intval(date('O'));
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$systemTimeZone = (round($systemTimeZone/100, 0)*60) + ($systemTimeZone%100);
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$clientTimeZone = \OC::$session->get('timezone')*60;
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$offset = $clientTimeZone - $systemTimeZone;
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$timestamp = $timestamp + $offset*60;
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}
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$l = OC_L10N::get('lib');
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return $l->l($dateOnly ? 'date' : 'datetime', $timestamp);
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}
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/**
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* @brief check if the current server configuration is suitable for ownCloud
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* @return array arrays with error messages and hints
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*/
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public static function checkServer() {
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// Assume that if checkServer() succeeded before in this session, then all is fine.
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if(\OC::$session->exists('checkServer_suceeded') && \OC::$session->get('checkServer_suceeded')) {
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return array();
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}
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$errors = array();
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$defaults = new \OC_Defaults();
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$webServerRestart = false;
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//check for database drivers
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if(!(is_callable('sqlite_open') or class_exists('SQLite3'))
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and !is_callable('mysql_connect')
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and !is_callable('pg_connect')
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and !is_callable('oci_connect')) {
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$errors[] = array(
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'error'=>'No database drivers (sqlite, mysql, or postgresql) installed.',
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'hint'=>'' //TODO: sane hint
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);
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$webServerRestart = true;
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}
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//common hint for all file permissions error messages
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$permissionsHint = 'Permissions can usually be fixed by '
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.'<a href="' . OC_Helper::linkToDocs('admin-dir_permissions')
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.'" target="_blank">giving the webserver write access to the root directory</a>.';
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// Check if config folder is writable.
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if(!is_writable(OC::$configDir) or !is_readable(OC::$configDir)) {
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$errors[] = array(
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'error' => "Can't write into config directory",
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'hint' => 'This can usually be fixed by '
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.'<a href="' . OC_Helper::linkToDocs('admin-dir_permissions')
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.'" target="_blank">giving the webserver write access to the config directory</a>.'
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);
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}
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// Check if there is a writable install folder.
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if(OC_Config::getValue('appstoreenabled', true)) {
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if( OC_App::getInstallPath() === null
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|| !is_writable(OC_App::getInstallPath())
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|| !is_readable(OC_App::getInstallPath()) ) {
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$errors[] = array(
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'error' => "Can't write into apps directory",
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'hint' => 'This can usually be fixed by '
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.'<a href="' . OC_Helper::linkToDocs('admin-dir_permissions')
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.'" target="_blank">giving the webserver write access to the apps directory</a> '
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.'or disabling the appstore in the config file.'
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);
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}
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}
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$CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
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// Create root dir.
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if(!is_dir($CONFIG_DATADIRECTORY)) {
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$success=@mkdir($CONFIG_DATADIRECTORY);
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if ($success) {
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$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
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} else {
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$errors[] = array(
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'error' => "Can't create data directory (".$CONFIG_DATADIRECTORY.")",
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'hint' => 'This can usually be fixed by '
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.'<a href="' . OC_Helper::linkToDocs('admin-dir_permissions')
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.'" target="_blank">giving the webserver write access to the root directory</a>.'
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);
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}
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} else if(!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) {
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$errors[] = array(
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'error'=>'Data directory ('.$CONFIG_DATADIRECTORY.') not writable by ownCloud',
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'hint'=>$permissionsHint
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);
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} else {
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$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
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}
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if(!OC_Util::isSetLocaleWorking()) {
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$errors[] = array(
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'error' => 'Setting locale to en_US.UTF-8/fr_FR.UTF-8/es_ES.UTF-8/de_DE.UTF-8/ru_RU.UTF-8/pt_BR.UTF-8/it_IT.UTF-8/ja_JP.UTF-8/zh_CN.UTF-8 failed',
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'hint' => 'Please install one of theses locales on your system and restart your webserver.'
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);
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}
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$moduleHint = "Please ask your server administrator to install the module.";
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// check if all required php modules are present
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if(!class_exists('ZipArchive')) {
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$errors[] = array(
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'error'=>'PHP module zip not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!class_exists('DOMDocument')) {
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$errors[] = array(
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'error' => 'PHP module dom not installed.',
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'hint' => $moduleHint
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);
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$webServerRestart =true;
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}
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if(!function_exists('xml_parser_create')) {
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$errors[] = array(
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'error' => 'PHP module libxml not installed.',
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'hint' => $moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('mb_detect_encoding')) {
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$errors[] = array(
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'error'=>'PHP module mb multibyte not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('ctype_digit')) {
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$errors[] = array(
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'error'=>'PHP module ctype is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('json_encode')) {
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$errors[] = array(
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'error'=>'PHP module JSON is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!extension_loaded('gd') || !function_exists('gd_info')) {
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$errors[] = array(
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'error'=>'PHP module GD is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('gzencode')) {
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$errors[] = array(
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'error'=>'PHP module zlib is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('iconv')) {
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$errors[] = array(
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'error'=>'PHP module iconv is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(!function_exists('simplexml_load_string')) {
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$errors[] = array(
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'error'=>'PHP module SimpleXML is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if(version_compare(phpversion(), '5.3.3', '<')) {
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$errors[] = array(
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'error'=>'PHP 5.3.3 or higher is required.',
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'hint'=>'Please ask your server administrator to update PHP to the latest version.'
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.' Your PHP version is no longer supported by ownCloud and the PHP community.'
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);
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$webServerRestart = true;
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}
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if(!defined('PDO::ATTR_DRIVER_NAME')) {
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$errors[] = array(
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'error'=>'PHP PDO module is not installed.',
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'hint'=>$moduleHint
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);
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$webServerRestart = true;
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}
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if (((strtolower(@ini_get('safe_mode')) == 'on')
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|| (strtolower(@ini_get('safe_mode')) == 'yes')
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|| (strtolower(@ini_get('safe_mode')) == 'true')
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|| (ini_get("safe_mode") == 1 ))) {
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$errors[] = array(
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'error'=>'PHP Safe Mode is enabled. ownCloud requires that it is disabled to work properly.',
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'hint'=>'PHP Safe Mode is a deprecated and mostly useless setting that should be disabled. '
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.'Please ask your server administrator to disable it in php.ini or in your webserver config.'
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);
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$webServerRestart = true;
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}
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if (get_magic_quotes_gpc() == 1 ) {
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$errors[] = array(
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'error'=>'Magic Quotes is enabled. ownCloud requires that it is disabled to work properly.',
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'hint'=>'Magic Quotes is a deprecated and mostly useless setting that should be disabled. '
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.'Please ask your server administrator to disable it in php.ini or in your webserver config.'
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);
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$webServerRestart = true;
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}
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if($webServerRestart) {
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$errors[] = array(
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'error'=>'PHP modules have been installed, but they are still listed as missing?',
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'hint'=>'Please ask your server administrator to restart the web server.'
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);
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}
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// Cache the result of this function
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\OC::$session->set('checkServer_suceeded', count($errors) == 0);
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return $errors;
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}
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/**
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* @brief check if there are still some encrypted files stored
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* @return boolean
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*/
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public static function encryptedFiles() {
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//check if encryption was enabled in the past
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$encryptedFiles = false;
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if (OC_App::isEnabled('files_encryption') === false) {
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$view = new OC\Files\View('/' . OCP\User::getUser());
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$keyfilePath = '/files_encryption/keyfiles';
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if ($view->is_dir($keyfilePath)) {
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$dircontent = $view->getDirectoryContent($keyfilePath);
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if (!empty($dircontent)) {
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$encryptedFiles = true;
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}
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}
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}
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|
|
return $encryptedFiles;
|
|
}
|
|
|
|
/**
|
|
* @brief Check for correct file permissions of data directory
|
|
* @param string $dataDirectory
|
|
* @return array arrays with error messages and hints
|
|
*/
|
|
public static function checkDataDirectoryPermissions($dataDirectory) {
|
|
$errors = array();
|
|
if (self::runningOnWindows()) {
|
|
//TODO: permissions checks for windows hosts
|
|
} else {
|
|
$permissionsModHint = 'Please change the permissions to 0770 so that the directory'
|
|
.' cannot be listed by other users.';
|
|
$perms = substr(decoct(@fileperms($dataDirectory)), -3);
|
|
if (substr($perms, -1) != '0') {
|
|
OC_Helper::chmodr($dataDirectory, 0770);
|
|
clearstatcache();
|
|
$perms = substr(decoct(@fileperms($dataDirectory)), -3);
|
|
if (substr($perms, 2, 1) != '0') {
|
|
$errors[] = array(
|
|
'error' => 'Data directory ('.$dataDirectory.') is readable for other users',
|
|
'hint' => $permissionsModHint
|
|
);
|
|
}
|
|
}
|
|
}
|
|
return $errors;
|
|
}
|
|
|
|
/**
|
|
* @return void
|
|
*/
|
|
public static function displayLoginPage($errors = array()) {
|
|
$parameters = array();
|
|
foreach( $errors as $key => $value ) {
|
|
$parameters[$value] = true;
|
|
}
|
|
if (!empty($_POST['user'])) {
|
|
$parameters["username"] = $_POST['user'];
|
|
$parameters['user_autofocus'] = false;
|
|
} else {
|
|
$parameters["username"] = '';
|
|
$parameters['user_autofocus'] = true;
|
|
}
|
|
if (isset($_REQUEST['redirect_url'])) {
|
|
$redirectUrl = $_REQUEST['redirect_url'];
|
|
$parameters['redirect_url'] = urlencode($redirectUrl);
|
|
}
|
|
|
|
$parameters['alt_login'] = OC_App::getAlternativeLogIns();
|
|
$parameters['rememberLoginAllowed'] = self::rememberLoginAllowed();
|
|
OC_Template::printGuestPage("", "login", $parameters);
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Check if the app is enabled, redirects to home if not
|
|
* @param string $app
|
|
* @return void
|
|
*/
|
|
public static function checkAppEnabled($app) {
|
|
if( !OC_App::isEnabled($app)) {
|
|
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
|
|
exit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the user is logged in, redirects to home if not. With
|
|
* redirect URL parameter to the request URI.
|
|
* @return void
|
|
*/
|
|
public static function checkLoggedIn() {
|
|
// Check if we are a user
|
|
if( !OC_User::isLoggedIn()) {
|
|
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php',
|
|
array('redirect_url' => OC_Request::requestUri())
|
|
));
|
|
exit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the user is a admin, redirects to home if not
|
|
* @return void
|
|
*/
|
|
public static function checkAdminUser() {
|
|
OC_Util::checkLoggedIn();
|
|
if( !OC_User::isAdminUser(OC_User::getUser())) {
|
|
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
|
|
exit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if it is allowed to remember login.
|
|
*
|
|
* @note Every app can set 'rememberlogin' to 'false' to disable the remember login feature
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function rememberLoginAllowed() {
|
|
|
|
$apps = OC_App::getEnabledApps();
|
|
|
|
foreach ($apps as $app) {
|
|
$appInfo = OC_App::getAppInfo($app);
|
|
if (isset($appInfo['rememberlogin']) && $appInfo['rememberlogin'] === 'false') {
|
|
return false;
|
|
}
|
|
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the user is a subadmin, redirects to home if not
|
|
* @return null|boolean $groups where the current user is subadmin
|
|
*/
|
|
public static function checkSubAdminUser() {
|
|
OC_Util::checkLoggedIn();
|
|
if(!OC_SubAdmin::isSubAdmin(OC_User::getUser())) {
|
|
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
|
|
exit();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Redirect to the user default page
|
|
* @return void
|
|
*/
|
|
public static function redirectToDefaultPage() {
|
|
if(isset($_REQUEST['redirect_url'])) {
|
|
$location = OC_Helper::makeURLAbsolute(urldecode($_REQUEST['redirect_url']));
|
|
}
|
|
else if (isset(OC::$REQUESTEDAPP) && !empty(OC::$REQUESTEDAPP)) {
|
|
$location = OC_Helper::linkToAbsolute( OC::$REQUESTEDAPP, 'index.php' );
|
|
} else {
|
|
$defaultPage = OC_Appconfig::getValue('core', 'defaultpage');
|
|
if ($defaultPage) {
|
|
$location = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/'.$defaultPage);
|
|
} else {
|
|
$location = OC_Helper::linkToAbsolute( 'files', 'index.php' );
|
|
}
|
|
}
|
|
OC_Log::write('core', 'redirectToDefaultPage: '.$location, OC_Log::DEBUG);
|
|
header( 'Location: '.$location );
|
|
exit();
|
|
}
|
|
|
|
/**
|
|
* @brief get an id unique for this instance
|
|
* @return string
|
|
*/
|
|
public static function getInstanceId() {
|
|
$id = OC_Config::getValue('instanceid', null);
|
|
if(is_null($id)) {
|
|
// We need to guarantee at least one letter in instanceid so it can be used as the session_name
|
|
$id = 'oc' . self::generateRandomBytes(10);
|
|
OC_Config::$object->setValue('instanceid', $id);
|
|
}
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* @brief Static lifespan (in seconds) when a request token expires.
|
|
* @see OC_Util::callRegister()
|
|
* @see OC_Util::isCallRegistered()
|
|
* @description
|
|
* Also required for the client side to compute the point in time when to
|
|
* request a fresh token. The client will do so when nearly 97% of the
|
|
* time span coded here has expired.
|
|
*/
|
|
public static $callLifespan = 3600; // 3600 secs = 1 hour
|
|
|
|
/**
|
|
* @brief Register an get/post call. Important to prevent CSRF attacks.
|
|
* @todo Write howto: CSRF protection guide
|
|
* @return $token Generated token.
|
|
* @description
|
|
* Creates a 'request token' (random) and stores it inside the session.
|
|
* Ever subsequent (ajax) request must use such a valid token to succeed,
|
|
* otherwise the request will be denied as a protection against CSRF.
|
|
* The tokens expire after a fixed lifespan.
|
|
* @see OC_Util::$callLifespan
|
|
* @see OC_Util::isCallRegistered()
|
|
*/
|
|
public static function callRegister() {
|
|
// Check if a token exists
|
|
if(!\OC::$session->exists('requesttoken')) {
|
|
// No valid token found, generate a new one.
|
|
$requestToken = self::generateRandomBytes(20);
|
|
\OC::$session->set('requesttoken', $requestToken);
|
|
} else {
|
|
// Valid token already exists, send it
|
|
$requestToken = \OC::$session->get('requesttoken');
|
|
}
|
|
return($requestToken);
|
|
}
|
|
|
|
/**
|
|
* @brief Check an ajax get/post call if the request token is valid.
|
|
* @return boolean False if request token is not set or is invalid.
|
|
* @see OC_Util::$callLifespan
|
|
* @see OC_Util::callRegister()
|
|
*/
|
|
public static function isCallRegistered() {
|
|
return \OC::$server->getRequest()->passesCSRFCheck();
|
|
}
|
|
|
|
/**
|
|
* @brief Check an ajax get/post call if the request token is valid. exit if not.
|
|
* @todo Write howto
|
|
* @return void
|
|
*/
|
|
public static function callCheck() {
|
|
if(!OC_Util::isCallRegistered()) {
|
|
exit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Public function to sanitize HTML
|
|
*
|
|
* This function is used to sanitize HTML and should be applied on any
|
|
* string or array of strings before displaying it on a web page.
|
|
*
|
|
* @param string|array of strings
|
|
* @return array with sanitized strings or a single sanitized string, depends on the input parameter.
|
|
*/
|
|
public static function sanitizeHTML( &$value ) {
|
|
if (is_array($value)) {
|
|
array_walk_recursive($value, 'OC_Util::sanitizeHTML');
|
|
} else {
|
|
//Specify encoding for PHP<5.4
|
|
$value = htmlentities((string)$value, ENT_QUOTES, 'UTF-8');
|
|
}
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* @brief Public function to encode url parameters
|
|
*
|
|
* This function is used to encode path to file before output.
|
|
* Encoding is done according to RFC 3986 with one exception:
|
|
* Character '/' is preserved as is.
|
|
*
|
|
* @param string $component part of URI to encode
|
|
* @return string
|
|
*/
|
|
public static function encodePath($component) {
|
|
$encoded = rawurlencode($component);
|
|
$encoded = str_replace('%2F', '/', $encoded);
|
|
return $encoded;
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the htaccess file is working
|
|
* @return bool
|
|
* @description Check if the htaccess file is working by creating a test
|
|
* file in the data directory and trying to access via http
|
|
*/
|
|
public static function isHtAccessWorking() {
|
|
if (!\OC_Config::getValue("check_for_working_htaccess", true)) {
|
|
return true;
|
|
}
|
|
|
|
// testdata
|
|
$fileName = '/htaccesstest.txt';
|
|
$testContent = 'testcontent';
|
|
|
|
// creating a test file
|
|
$testFile = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ).'/'.$fileName;
|
|
|
|
if(file_exists($testFile)) {// already running this test, possible recursive call
|
|
return false;
|
|
}
|
|
|
|
$fp = @fopen($testFile, 'w');
|
|
if (!$fp) {
|
|
throw new OC\HintException('Can\'t create test file to check for working .htaccess file.',
|
|
'Make sure it is possible for the webserver to write to '.$testFile);
|
|
}
|
|
fwrite($fp, $testContent);
|
|
fclose($fp);
|
|
|
|
// accessing the file via http
|
|
$url = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/data'.$fileName);
|
|
$fp = @fopen($url, 'r');
|
|
$content=@fread($fp, 2048);
|
|
@fclose($fp);
|
|
|
|
// cleanup
|
|
@unlink($testFile);
|
|
|
|
// does it work ?
|
|
if($content==$testContent) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief test if webDAV is working properly
|
|
* @return bool
|
|
* @description
|
|
* The basic assumption is that if the server returns 401/Not Authenticated for an unauthenticated PROPFIND
|
|
* the web server it self is setup properly.
|
|
*
|
|
* Why not an authenticated PROPFIND and other verbs?
|
|
* - We don't have the password available
|
|
* - We have no idea about other auth methods implemented (e.g. OAuth with Bearer header)
|
|
*
|
|
*/
|
|
public static function isWebDAVWorking() {
|
|
if (!function_exists('curl_init')) {
|
|
return true;
|
|
}
|
|
if (!\OC_Config::getValue("check_for_working_webdav", true)) {
|
|
return true;
|
|
}
|
|
$settings = array(
|
|
'baseUri' => OC_Helper::linkToRemote('webdav'),
|
|
);
|
|
|
|
$client = new \OC_DAVClient($settings);
|
|
|
|
$client->setRequestTimeout(10);
|
|
|
|
// for this self test we don't care if the ssl certificate is self signed and the peer cannot be verified.
|
|
$client->setVerifyPeer(false);
|
|
|
|
$return = true;
|
|
try {
|
|
// test PROPFIND
|
|
$client->propfind('', array('{DAV:}resourcetype'));
|
|
} catch (\Sabre_DAV_Exception_NotAuthenticated $e) {
|
|
$return = true;
|
|
} catch (\Exception $e) {
|
|
OC_Log::write('core', 'isWebDAVWorking: NO - Reason: '.$e->getMessage(). ' ('.get_class($e).')', OC_Log::WARN);
|
|
$return = false;
|
|
}
|
|
|
|
return $return;
|
|
}
|
|
|
|
/**
|
|
* Check if the setlocal call does not work. This can happen if the right
|
|
* local packages are not available on the server.
|
|
* @return bool
|
|
*/
|
|
public static function isSetLocaleWorking() {
|
|
// setlocale test is pointless on Windows
|
|
if (OC_Util::runningOnWindows() ) {
|
|
return true;
|
|
}
|
|
|
|
\Patchwork\Utf8\Bootup::initLocale();
|
|
if ('' === basename('§')) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the PHP module fileinfo is loaded.
|
|
* @return bool
|
|
*/
|
|
public static function fileInfoLoaded() {
|
|
return function_exists('finfo_open');
|
|
}
|
|
|
|
/**
|
|
* @brief Check if a PHP version older then 5.3.8 is installed.
|
|
* @return bool
|
|
*/
|
|
public static function isPHPoutdated() {
|
|
return version_compare(phpversion(), '5.3.8', '<');
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the ownCloud server can connect to the internet
|
|
* @return bool
|
|
*/
|
|
public static function isInternetConnectionWorking() {
|
|
// in case there is no internet connection on purpose return false
|
|
if (self::isInternetConnectionEnabled() === false) {
|
|
return false;
|
|
}
|
|
|
|
// in case the connection is via proxy return true to avoid connecting to owncloud.org
|
|
if(OC_Config::getValue('proxy', '') != '') {
|
|
return true;
|
|
}
|
|
|
|
// try to connect to owncloud.org to see if http connections to the internet are possible.
|
|
$connected = @fsockopen("www.owncloud.org", 80);
|
|
if ($connected) {
|
|
fclose($connected);
|
|
return true;
|
|
} else {
|
|
// second try in case one server is down
|
|
$connected = @fsockopen("apps.owncloud.com", 80);
|
|
if ($connected) {
|
|
fclose($connected);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Check if the connection to the internet is disabled on purpose
|
|
* @return string
|
|
*/
|
|
public static function isInternetConnectionEnabled(){
|
|
return \OC_Config::getValue("has_internet_connection", true);
|
|
}
|
|
|
|
/**
|
|
* @brief clear all levels of output buffering
|
|
* @return void
|
|
*/
|
|
public static function obEnd(){
|
|
while (ob_get_level()) {
|
|
ob_end_clean();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Generates a cryptographic secure pseudo-random string
|
|
* @param Int $length of the random string
|
|
* @return String
|
|
* Please also update secureRNGAvailable if you change something here
|
|
*/
|
|
public static function generateRandomBytes($length = 30) {
|
|
// Try to use openssl_random_pseudo_bytes
|
|
if (function_exists('openssl_random_pseudo_bytes')) {
|
|
$pseudoByte = bin2hex(openssl_random_pseudo_bytes($length, $strong));
|
|
if($strong == true) {
|
|
return substr($pseudoByte, 0, $length); // Truncate it to match the length
|
|
}
|
|
}
|
|
|
|
// Try to use /dev/urandom
|
|
if (!self::runningOnWindows()) {
|
|
$fp = @file_get_contents('/dev/urandom', false, null, 0, $length);
|
|
if ($fp !== false) {
|
|
$string = substr(bin2hex($fp), 0, $length);
|
|
return $string;
|
|
}
|
|
}
|
|
|
|
// Fallback to mt_rand()
|
|
$characters = '0123456789';
|
|
$characters .= 'abcdefghijklmnopqrstuvwxyz';
|
|
$charactersLength = strlen($characters)-1;
|
|
$pseudoByte = "";
|
|
|
|
// Select some random characters
|
|
for ($i = 0; $i < $length; $i++) {
|
|
$pseudoByte .= $characters[mt_rand(0, $charactersLength)];
|
|
}
|
|
return $pseudoByte;
|
|
}
|
|
|
|
/**
|
|
* @brief Checks if a secure random number generator is available
|
|
* @return bool
|
|
*/
|
|
public static function secureRNGAvailable() {
|
|
// Check openssl_random_pseudo_bytes
|
|
if(function_exists('openssl_random_pseudo_bytes')) {
|
|
openssl_random_pseudo_bytes(1, $strong);
|
|
if($strong == true) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Check /dev/urandom
|
|
if (!self::runningOnWindows()) {
|
|
$fp = @file_get_contents('/dev/urandom', false, null, 0, 1);
|
|
if ($fp !== false) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @Brief Get file content via curl.
|
|
* @param string $url Url to get content
|
|
* @return string of the response or false on error
|
|
* This function get the content of a page via curl, if curl is enabled.
|
|
* If not, file_get_contents is used.
|
|
*/
|
|
public static function getUrlContent($url) {
|
|
if (function_exists('curl_init')) {
|
|
$curl = curl_init();
|
|
|
|
curl_setopt($curl, CURLOPT_HEADER, 0);
|
|
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
|
|
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
|
|
curl_setopt($curl, CURLOPT_URL, $url);
|
|
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
|
|
curl_setopt($curl, CURLOPT_MAXREDIRS, 10);
|
|
|
|
curl_setopt($curl, CURLOPT_USERAGENT, "ownCloud Server Crawler");
|
|
if(OC_Config::getValue('proxy', '') != '') {
|
|
curl_setopt($curl, CURLOPT_PROXY, OC_Config::getValue('proxy'));
|
|
}
|
|
if(OC_Config::getValue('proxyuserpwd', '') != '') {
|
|
curl_setopt($curl, CURLOPT_PROXYUSERPWD, OC_Config::getValue('proxyuserpwd'));
|
|
}
|
|
$data = curl_exec($curl);
|
|
curl_close($curl);
|
|
|
|
} else {
|
|
$contextArray = null;
|
|
|
|
if(OC_Config::getValue('proxy', '') != '') {
|
|
$contextArray = array(
|
|
'http' => array(
|
|
'timeout' => 10,
|
|
'proxy' => OC_Config::getValue('proxy')
|
|
)
|
|
);
|
|
} else {
|
|
$contextArray = array(
|
|
'http' => array(
|
|
'timeout' => 10
|
|
)
|
|
);
|
|
}
|
|
|
|
$ctx = stream_context_create(
|
|
$contextArray
|
|
);
|
|
$data = @file_get_contents($url, 0, $ctx);
|
|
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @return bool - well are we running on windows or not
|
|
*/
|
|
public static function runningOnWindows() {
|
|
return (substr(PHP_OS, 0, 3) === "WIN");
|
|
}
|
|
|
|
/**
|
|
* Handles the case that there may not be a theme, then check if a "default"
|
|
* theme exists and take that one
|
|
* @return string the theme
|
|
*/
|
|
public static function getTheme() {
|
|
$theme = OC_Config::getValue("theme", '');
|
|
|
|
if($theme === '') {
|
|
if(is_dir(OC::$SERVERROOT . '/themes/default')) {
|
|
$theme = 'default';
|
|
}
|
|
}
|
|
|
|
return $theme;
|
|
}
|
|
|
|
/**
|
|
* @brief Clear the opcode cache if one exists
|
|
* This is necessary for writing to the config file
|
|
* in case the opcode cache does not re-validate files
|
|
* @return void
|
|
*/
|
|
public static function clearOpcodeCache() {
|
|
// APC
|
|
if (function_exists('apc_clear_cache')) {
|
|
apc_clear_cache();
|
|
}
|
|
// Zend Opcache
|
|
if (function_exists('accelerator_reset')) {
|
|
accelerator_reset();
|
|
}
|
|
// XCache
|
|
if (function_exists('xcache_clear_cache')) {
|
|
if (ini_get('xcache.admin.enable_auth')) {
|
|
OC_Log::write('core', 'XCache opcode cache will not be cleared because "xcache.admin.enable_auth" is enabled.', \OC_Log::WARN);
|
|
} else {
|
|
xcache_clear_cache(XC_TYPE_PHP, 0);
|
|
}
|
|
}
|
|
// Opcache (PHP >= 5.5)
|
|
if (function_exists('opcache_reset')) {
|
|
opcache_reset();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Normalize a unicode string
|
|
* @param string $value a not normalized string
|
|
* @return bool|string
|
|
*/
|
|
public static function normalizeUnicode($value) {
|
|
if(class_exists('Patchwork\PHP\Shim\Normalizer')) {
|
|
$normalizedValue = \Patchwork\PHP\Shim\Normalizer::normalize($value);
|
|
if($normalizedValue === false) {
|
|
\OC_Log::write( 'core', 'normalizing failed for "' . $value . '"', \OC_Log::WARN);
|
|
} else {
|
|
$value = $normalizedValue;
|
|
}
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* @param boolean|string $file
|
|
* @return string
|
|
*/
|
|
public static function basename($file) {
|
|
$file = rtrim($file, '/');
|
|
$t = explode('/', $file);
|
|
return array_pop($t);
|
|
}
|
|
|
|
/**
|
|
* A human readable string is generated based on version, channel and build number
|
|
* @return string
|
|
*/
|
|
public static function getHumanVersion() {
|
|
$version = OC_Util::getVersionString().' ('.OC_Util::getChannel().')';
|
|
$build = OC_Util::getBuild();
|
|
if(!empty($build) and OC_Util::getChannel() === 'daily') {
|
|
$version .= ' Build:' . $build;
|
|
}
|
|
return $version;
|
|
}
|
|
|
|
/**
|
|
* Returns whether the given file name is valid
|
|
* @param $file string file name to check
|
|
* @return bool true if the file name is valid, false otherwise
|
|
*/
|
|
public static function isValidFileName($file) {
|
|
$trimmed = trim($file);
|
|
if ($trimmed === '') {
|
|
return false;
|
|
}
|
|
if ($trimmed === '.' || $trimmed === '..') {
|
|
return false;
|
|
}
|
|
foreach (str_split($trimmed) as $char) {
|
|
if (strpos(\OCP\FILENAME_INVALID_CHARS, $char) !== false) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|