nextcloud/lib/private/util.php

1364 lines
39 KiB
PHP

<?php
/**
* Class for utility functions
*
*/
class OC_Util {
public static $scripts = array();
public static $styles = array();
public static $headers = array();
private static $rootMounted = false;
private static $fsSetup = false;
private static function initLocalStorageRootFS() {
// mount local file backend as root
$configDataDirectory = OC_Config::getValue("datadirectory", OC::$SERVERROOT . "/data");
//first set up the local "root" storage
\OC\Files\Filesystem::initMounts();
if (!self::$rootMounted) {
\OC\Files\Filesystem::mount('\OC\Files\Storage\Local', array('datadir' => $configDataDirectory), '/');
self::$rootMounted = true;
}
}
/**
* mounting an object storage as the root fs will in essence remove the
* necessity of a data folder being present.
* TODO make home storage aware of this and use the object storage instead of local disk access
*
* @param array $config containing 'class' and optional 'arguments'
*/
private static function initObjectStoreRootFS($config) {
// check misconfiguration
if (empty($config['class'])) {
\OCP\Util::writeLog('files', 'No class given for objectstore', \OCP\Util::ERROR);
}
if (!isset($config['arguments'])) {
$config['arguments'] = array();
}
// instantiate object store implementation
$config['arguments']['objectstore'] = new $config['class']($config['arguments']);
// mount with plain / root object store implementation
$config['class'] = '\OC\Files\ObjectStore\ObjectStoreStorage';
// mount object storage as root
\OC\Files\Filesystem::initMounts();
if (!self::$rootMounted) {
\OC\Files\Filesystem::mount($config['class'], $config['arguments'], '/');
self::$rootMounted = true;
}
}
/**
* Can be set up
*
* @param string $user
* @return boolean
* @description configure the initial filesystem based on the configuration
*/
public static function setupFS($user = '') {
//setting up the filesystem twice can only lead to trouble
if (self::$fsSetup) {
return false;
}
\OC::$server->getEventLogger()->start('setup_fs', 'Setup filesystem');
// If we are not forced to load a specific user we load the one that is logged in
if ($user == "" && OC_User::isLoggedIn()) {
$user = OC_User::getUser();
}
// load all filesystem apps before, so no setup-hook gets lost
OC_App::loadApps(array('filesystem'));
// the filesystem will finish when $user is not empty,
// mark fs setup here to avoid doing the setup from loading
// OC_Filesystem
if ($user != '') {
self::$fsSetup = true;
}
//check if we are using an object storage
$objectStore = OC_Config::getValue('objectstore');
if (isset($objectStore)) {
self::initObjectStoreRootFS($objectStore);
} else {
self::initLocalStorageRootFS();
}
if ($user != '' && !OCP\User::userExists($user)) {
\OC::$server->getEventLogger()->end('setup_fs');
return false;
}
//if we aren't logged in, there is no use to set up the filesystem
if ($user != "") {
\OC\Files\Filesystem::addStorageWrapper('oc_quota', function ($mountPoint, $storage) {
// set up quota for home storages, even for other users
// which can happen when using sharing
/**
* @var \OC\Files\Storage\Storage $storage
*/
if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
|| $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
) {
if (is_object($storage->getUser())) {
$user = $storage->getUser()->getUID();
$quota = OC_Util::getUserQuota($user);
if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) {
return new \OC\Files\Storage\Wrapper\Quota(array('storage' => $storage, 'quota' => $quota, 'root' => 'files'));
}
}
}
return $storage;
});
$userDir = '/' . $user . '/files';
//jail the user into his "home" directory
\OC\Files\Filesystem::init($user, $userDir);
$fileOperationProxy = new OC_FileProxy_FileOperations();
OC_FileProxy::register($fileOperationProxy);
//trigger creation of user home and /files folder
\OC::$server->getUserFolder($user);
OC_Hook::emit('OC_Filesystem', 'setup', array('user' => $user, 'user_dir' => $userDir));
}
\OC::$server->getEventLogger()->end('setup_fs');
return true;
}
/**
* check if a password is required for each public link
*
* @return boolean
*/
public static function isPublicLinkPasswordRequired() {
$appConfig = \OC::$server->getAppConfig();
$enforcePassword = $appConfig->getValue('core', 'shareapi_enforce_links_password', 'no');
return ($enforcePassword === 'yes') ? true : false;
}
/**
* check if sharing is disabled for the current user
*
* @return boolean
*/
public static function isSharingDisabledForUser() {
if (\OC_Appconfig::getValue('core', 'shareapi_exclude_groups', 'no') === 'yes') {
$user = \OCP\User::getUser();
$groupsList = \OC_Appconfig::getValue('core', 'shareapi_exclude_groups_list', '');
$excludedGroups = explode(',', $groupsList);
$usersGroups = \OC_Group::getUserGroups($user);
if (!empty($usersGroups)) {
$remainingGroups = array_diff($usersGroups, $excludedGroups);
// if the user is only in groups which are disabled for sharing then
// sharing is also disabled for the user
if (empty($remainingGroups)) {
return true;
}
}
}
return false;
}
/**
* check if share API enforces a default expire date
*
* @return boolean
*/
public static function isDefaultExpireDateEnforced() {
$isDefaultExpireDateEnabled = \OCP\Config::getAppValue('core', 'shareapi_default_expire_date', 'no');
$enforceDefaultExpireDate = false;
if ($isDefaultExpireDateEnabled === 'yes') {
$value = \OCP\Config::getAppValue('core', 'shareapi_enforce_expire_date', 'no');
$enforceDefaultExpireDate = ($value === 'yes') ? true : false;
}
return $enforceDefaultExpireDate;
}
/**
* Get the quota of a user
*
* @param string $user
* @return int Quota bytes
*/
public static function getUserQuota($user) {
$config = \OC::$server->getConfig();
$userQuota = $config->getUserValue($user, 'files', 'quota', 'default');
if ($userQuota === 'default') {
$userQuota = $config->getAppValue('files', 'default_quota', 'none');
}
if($userQuota === 'none') {
return \OCP\Files\FileInfo::SPACE_UNLIMITED;
}else{
return OC_Helper::computerFileSize($userQuota);
}
}
/**
* copies the skeleton to the users /files
*
* @param \OC\User\User $user
* @param \OCP\Files\Folder $userDirectory
*/
public static function copySkeleton(\OC\User\User $user, \OCP\Files\Folder $userDirectory) {
$skeletonDirectory = \OCP\Config::getSystemValue('skeletondirectory', \OC::$SERVERROOT . '/core/skeleton');
if (!empty($skeletonDirectory)) {
\OCP\Util::writeLog(
'files_skeleton',
'copying skeleton for '.$user->getUID().' from '.$skeletonDirectory.' to '.$userDirectory->getFullPath('/'),
\OCP\Util::DEBUG
);
self::copyr($skeletonDirectory, $userDirectory);
// update the file cache
$userDirectory->getStorage()->getScanner()->scan('', \OC\Files\Cache\Scanner::SCAN_RECURSIVE);
}
}
/**
* copies a directory recursively by using streams
*
* @param string $source
* @param \OCP\Files\Folder $target
* @return void
*/
public static function copyr($source, \OCP\Files\Folder $target) {
$dir = opendir($source);
while (false !== ($file = readdir($dir))) {
if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
if (is_dir($source . '/' . $file)) {
$child = $target->newFolder($file);
self::copyr($source . '/' . $file, $child);
} else {
$child = $target->newFile($file);
stream_copy_to_stream(fopen($source . '/' . $file,'r'), $child->fopen('w'));
}
}
}
closedir($dir);
}
/**
* @return void
*/
public static function tearDownFS() {
\OC\Files\Filesystem::tearDown();
self::$fsSetup = false;
self::$rootMounted = false;
}
/**
* get the current installed version of ownCloud
*
* @return array
*/
public static function getVersion() {
OC_Util::loadVersion();
return \OC::$server->getSession()->get('OC_Version');
}
/**
* get the current installed version string of ownCloud
*
* @return string
*/
public static function getVersionString() {
OC_Util::loadVersion();
return \OC::$server->getSession()->get('OC_VersionString');
}
/**
* @description get the current installed edition of ownCloud. There is the community
* edition that just returns an empty string and the enterprise edition
* that returns "Enterprise".
* @return string
*/
public static function getEditionString() {
OC_Util::loadVersion();
return \OC::$server->getSession()->get('OC_Edition');
}
/**
* @description get the update channel of the current installed of ownCloud.
* @return string
*/
public static function getChannel() {
OC_Util::loadVersion();
return \OC::$server->getSession()->get('OC_Channel');
}
/**
* @description get the build number of the current installed of ownCloud.
* @return string
*/
public static function getBuild() {
OC_Util::loadVersion();
return \OC::$server->getSession()->get('OC_Build');
}
/**
* @description load the version.php into the session as cache
*/
private static function loadVersion() {
$timestamp = filemtime(OC::$SERVERROOT . '/version.php');
if (!\OC::$server->getSession()->exists('OC_Version') or OC::$server->getSession()->get('OC_Version_Timestamp') != $timestamp) {
require 'version.php';
$session = \OC::$server->getSession();
/** @var $timestamp int */
$session->set('OC_Version_Timestamp', $timestamp);
/** @var $OC_Version string */
$session->set('OC_Version', $OC_Version);
/** @var $OC_VersionString string */
$session->set('OC_VersionString', $OC_VersionString);
/** @var $OC_Edition string */
$session->set('OC_Edition', $OC_Edition);
/** @var $OC_Channel string */
$session->set('OC_Channel', $OC_Channel);
/** @var $OC_Build string */
$session->set('OC_Build', $OC_Build);
}
}
/**
* generates a path for JS/CSS files. If no application is provided it will create the path for core.
*
* @param string $application application to get the files from
* @param string $directory directory withing this application (css, js, vendor, etc)
* @param string $file the file inside of the above folder
* @return string the path
*/
private static function generatePath($application, $directory, $file) {
if (is_null($file)) {
$file = $application;
$application = "";
}
if (!empty($application)) {
return "$application/$directory/$file";
} else {
return "$directory/$file";
}
}
/**
* add a javascript file
*
* @param string $application application id
* @param string|null $file filename
* @return void
*/
public static function addScript($application, $file = null) {
$path = OC_Util::generatePath($application, 'js', $file);
if (!in_array($path, self::$scripts)) {
self::$scripts[] = $path;
}
}
/**
* add a javascript file from the vendor sub folder
*
* @param string $application application id
* @param string|null $file filename
* @return void
*/
public static function addVendorScript($application, $file = null) {
$path = OC_Util::generatePath($application, 'vendor', $file);
if (!in_array($path, self::$scripts)) {
self::$scripts[] = $path;
}
}
/**
* add a translation JS file
*
* @param string $application application id
* @param string $languageCode language code, defaults to the current language
*/
public static function addTranslations($application, $languageCode = null) {
if (is_null($languageCode)) {
$l = new \OC_L10N($application);
$languageCode = $l->getLanguageCode($application);
}
if (!empty($application)) {
$path = "$application/l10n/$languageCode";
} else {
$path = "l10n/$languageCode";
}
if (!in_array($path, self::$scripts)) {
self::$scripts[] = $path;
}
}
/**
* add a css file
*
* @param string $application application id
* @param string|null $file filename
* @return void
*/
public static function addStyle($application, $file = null) {
$path = OC_Util::generatePath($application, 'css', $file);
if (!in_array($path, self::$styles)) {
self::$styles[] = $path;
}
}
/**
* add a css file from the vendor sub folder
*
* @param string $application application id
* @param string|null $file filename
* @return void
*/
public static function addVendorStyle($application, $file = null) {
$path = OC_Util::generatePath($application, 'vendor', $file);
if (!in_array($path, self::$styles)) {
self::$styles[] = $path;
}
}
/**
* Add a custom element to the header
* If $text is null then the element will be written as empty element.
* So use "" to get a closing tag.
* @param string $tag tag name of the element
* @param array $attributes array of attributes for the element
* @param string $text the text content for the element
*/
public static function addHeader($tag, $attributes, $text=null) {
self::$headers[] = array(
'tag' => $tag,
'attributes' => $attributes,
'text' => $text
);
}
/**
* formats a timestamp in the "right" way
*
* @param int $timestamp
* @param bool $dateOnly option to omit time from the result
* @param DateTimeZone|string $timeZone where the given timestamp shall be converted to
* @return string timestamp
*
* @deprecated Use \OC::$server->query('DateTimeFormatter') instead
*/
public static function formatDate($timestamp, $dateOnly = false, $timeZone = null) {
if ($timeZone !== null && !$timeZone instanceof \DateTimeZone) {
$timeZone = new \DateTimeZone($timeZone);
}
/** @var \OC\DateTimeFormatter $formatter */
$formatter = \OC::$server->query('DateTimeFormatter');
if ($dateOnly) {
return $formatter->formatDate($timestamp, 'long', $timeZone);
}
return $formatter->formatDateTime($timestamp, 'long', 'long', $timeZone);
}
/**
* check if the current server configuration is suitable for ownCloud
*
* @param \OCP\IConfig $config
* @return array arrays with error messages and hints
*/
public static function checkServer(\OCP\IConfig $config) {
$l = \OC::$server->getL10N('lib');
$errors = array();
$CONFIG_DATADIRECTORY = $config->getSystemValue('datadirectory', OC::$SERVERROOT . '/data');
if (!self::needUpgrade($config) && $config->getSystemValue('installed', false)) {
// this check needs to be done every time
$errors = self::checkDataDirectoryValidity($CONFIG_DATADIRECTORY);
}
// Assume that if checkServer() succeeded before in this session, then all is fine.
if (\OC::$server->getSession()->exists('checkServer_succeeded') && \OC::$server->getSession()->get('checkServer_succeeded')) {
return $errors;
}
$webServerRestart = false;
$setup = new OC_Setup($config);
$availableDatabases = $setup->getSupportedDatabases();
if (empty($availableDatabases)) {
$errors[] = array(
'error' => $l->t('No database drivers (sqlite, mysql, or postgresql) installed.'),
'hint' => '' //TODO: sane hint
);
$webServerRestart = true;
}
//common hint for all file permissions error messages
$permissionsHint = $l->t('Permissions can usually be fixed by '
. '%sgiving the webserver write access to the root directory%s.',
array('<a href="' . \OC_Helper::linkToDocs('admin-dir_permissions') . '" target="_blank">', '</a>'));
// Check if config folder is writable.
if (!is_writable(OC::$configDir) or !is_readable(OC::$configDir)) {
$errors[] = array(
'error' => $l->t('Cannot write into "config" directory'),
'hint' => $l->t('This can usually be fixed by '
. '%sgiving the webserver write access to the config directory%s.',
array('<a href="' . \OC_Helper::linkToDocs('admin-dir_permissions') . '" target="_blank">', '</a>'))
);
}
// Check if there is a writable install folder.
if ($config->getSystemValue('appstoreenabled', true)) {
if (OC_App::getInstallPath() === null
|| !is_writable(OC_App::getInstallPath())
|| !is_readable(OC_App::getInstallPath())
) {
$errors[] = array(
'error' => $l->t('Cannot write into "apps" directory'),
'hint' => $l->t('This can usually be fixed by '
. '%sgiving the webserver write access to the apps directory%s'
. ' or disabling the appstore in the config file.',
array('<a href="' . \OC_Helper::linkToDocs('admin-dir_permissions') . '" target="_blank">', '</a>'))
);
}
}
// Create root dir.
if ($config->getSystemValue('installed', false)) {
if (!is_dir($CONFIG_DATADIRECTORY)) {
$success = @mkdir($CONFIG_DATADIRECTORY);
if ($success) {
$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
} else {
$errors[] = array(
'error' => $l->t('Cannot create "data" directory (%s)', array($CONFIG_DATADIRECTORY)),
'hint' => $l->t('This can usually be fixed by '
. '<a href="%s" target="_blank">giving the webserver write access to the root directory</a>.',
array(OC_Helper::linkToDocs('admin-dir_permissions')))
);
}
} else if (!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) {
$errors[] = array(
'error' => 'Data directory (' . $CONFIG_DATADIRECTORY . ') not writable by ownCloud',
'hint' => $permissionsHint
);
} else {
$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
}
}
if (!OC_Util::isSetLocaleWorking()) {
$errors[] = array(
'error' => $l->t('Setting locale to %s failed',
array('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')),
'hint' => $l->t('Please install one of these locales on your system and restart your webserver.')
);
}
// Contains the dependencies that should be checked against
// classes = class_exists
// functions = function_exists
// defined = defined
// If the dependency is not found the missing module name is shown to the EndUser
$dependencies = array(
'classes' => array(
'ZipArchive' => 'zip',
'DOMDocument' => 'dom',
'XMLWriter' => 'XMLWriter'
),
'functions' => array(
'xml_parser_create' => 'libxml',
'mb_detect_encoding' => 'mb multibyte',
'ctype_digit' => 'ctype',
'json_encode' => 'JSON',
'gd_info' => 'GD',
'gzencode' => 'zlib',
'iconv' => 'iconv',
'simplexml_load_string' => 'SimpleXML'
),
'defined' => array(
'PDO::ATTR_DRIVER_NAME' => 'PDO'
)
);
$missingDependencies = array();
$moduleHint = $l->t('Please ask your server administrator to install the module.');
foreach ($dependencies['classes'] as $class => $module) {
if (!class_exists($class)) {
$missingDependencies[] = $module;
}
}
foreach ($dependencies['functions'] as $function => $module) {
if (!function_exists($function)) {
$missingDependencies[] = $module;
}
}
foreach ($dependencies['defined'] as $defined => $module) {
if (!defined($defined)) {
$missingDependencies[] = $module;
}
}
foreach($missingDependencies as $missingDependency) {
$errors[] = array(
'error' => $l->t('PHP module %s not installed.', array($missingDependency)),
'hint' => $moduleHint
);
$webServerRestart = true;
}
if (version_compare(phpversion(), '5.4.0', '<')) {
$errors[] = array(
'error' => $l->t('PHP %s or higher is required.', '5.4.0'),
'hint' => $l->t('Please ask your server administrator to update PHP to the latest version.'
. ' Your PHP version is no longer supported by ownCloud and the PHP community.')
);
$webServerRestart = true;
}
if (!self::isAnnotationsWorking()) {
$errors[] = array(
'error' => 'PHP is apparently setup to strip inline doc blocks. This will make several core apps inaccessible.',
'hint' => 'This is probably caused by a cache/accelerator such as Zend OPcache or eAccelerator.'
);
}
if ($webServerRestart) {
$errors[] = array(
'error' => $l->t('PHP modules have been installed, but they are still listed as missing?'),
'hint' => $l->t('Please ask your server administrator to restart the web server.')
);
}
$errors = array_merge($errors, self::checkDatabaseVersion());
// Cache the result of this function
\OC::$server->getSession()->set('checkServer_succeeded', count($errors) == 0);
return $errors;
}
/**
* Check the database version
*
* @return array errors array
*/
public static function checkDatabaseVersion() {
$l = \OC::$server->getL10N('lib');
$errors = array();
$dbType = \OC_Config::getValue('dbtype', 'sqlite');
if ($dbType === 'pgsql') {
// check PostgreSQL version
try {
$result = \OC_DB::executeAudited('SHOW SERVER_VERSION');
$data = $result->fetchRow();
if (isset($data['server_version'])) {
$version = $data['server_version'];
if (version_compare($version, '9.0.0', '<')) {
$errors[] = array(
'error' => $l->t('PostgreSQL >= 9 required'),
'hint' => $l->t('Please upgrade your database version')
);
}
}
} catch (\Doctrine\DBAL\DBALException $e) {
\OCP\Util::logException('core', $e);
$errors[] = array(
'error' => $l->t('Error occurred while checking PostgreSQL version'),
'hint' => $l->t('Please make sure you have PostgreSQL >= 9 or'
. ' check the logs for more information about the error')
);
}
}
return $errors;
}
/**
* check if there are still some encrypted files stored
*
* @return boolean
*/
public static function encryptedFiles() {
//check if encryption was enabled in the past
$encryptedFiles = false;
if (OC_App::isEnabled('files_encryption') === false) {
$view = new OC\Files\View('/' . OCP\User::getUser());
$keyfilePath = '/files_encryption/keyfiles';
if ($view->is_dir($keyfilePath)) {
$dircontent = $view->getDirectoryContent($keyfilePath);
if (!empty($dircontent)) {
$encryptedFiles = true;
}
}
}
return $encryptedFiles;
}
/**
* check if a backup from the encryption keys exists
*
* @return boolean
*/
public static function backupKeysExists() {
//check if encryption was enabled in the past
$backupExists = false;
if (OC_App::isEnabled('files_encryption') === false) {
$view = new OC\Files\View('/' . OCP\User::getUser());
$backupPath = '/files_encryption/keyfiles.backup';
if ($view->is_dir($backupPath)) {
$dircontent = $view->getDirectoryContent($backupPath);
if (!empty($dircontent)) {
$backupExists = true;
}
}
}
return $backupExists;
}
/**
* Check for correct file permissions of data directory
*
* @param string $dataDirectory
* @return array arrays with error messages and hints
*/
public static function checkDataDirectoryPermissions($dataDirectory) {
$l = \OC::$server->getL10N('lib');
$errors = array();
if (self::runningOnWindows()) {
//TODO: permissions checks for windows hosts
} else {
$permissionsModHint = $l->t('Please change the permissions to 0770 so that the directory'
. ' cannot be listed by other users.');
$perms = substr(decoct(@fileperms($dataDirectory)), -3);
if (substr($perms, -1) != '0') {
chmod($dataDirectory, 0770);
clearstatcache();
$perms = substr(decoct(@fileperms($dataDirectory)), -3);
if (substr($perms, 2, 1) != '0') {
$errors[] = array(
'error' => $l->t('Data directory (%s) is readable by other users', array($dataDirectory)),
'hint' => $permissionsModHint
);
}
}
}
return $errors;
}
/**
* Check that the data directory exists and is valid by
* checking the existence of the ".ocdata" file.
*
* @param string $dataDirectory data directory path
* @return bool true if the data directory is valid, false otherwise
*/
public static function checkDataDirectoryValidity($dataDirectory) {
$l = \OC::$server->getL10N('lib');
$errors = array();
if (!file_exists($dataDirectory . '/.ocdata')) {
$errors[] = array(
'error' => $l->t('Data directory (%s) is invalid', array($dataDirectory)),
'hint' => $l->t('Please check that the data directory contains a file' .
' ".ocdata" in its root.')
);
}
return $errors;
}
/**
* @param array $errors
*/
public static function displayLoginPage($errors = array()) {
$parameters = array();
foreach ($errors as $value) {
$parameters[$value] = true;
}
if (!empty($_REQUEST['user'])) {
$parameters["username"] = $_REQUEST['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);
}
/**
* 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();
}
}
/**
* 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;
}
/**
* 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;
}
/**
* Returns the URL of the default page
* based on the system configuration and
* the apps visible for the current user
*
* @return string URL
*/
public static function getDefaultPageUrl() {
$urlGenerator = \OC::$server->getURLGenerator();
// Deny the redirect if the URL contains a @
// This prevents unvalidated redirects like ?redirect_url=:user@domain.com
if (isset($_REQUEST['redirect_url']) && strpos($_REQUEST['redirect_url'], '@') === false) {
$location = $urlGenerator->getAbsoluteURL(urldecode($_REQUEST['redirect_url']));
} else {
$defaultPage = OC_Appconfig::getValue('core', 'defaultpage');
if ($defaultPage) {
$location = $urlGenerator->getAbsoluteURL($defaultPage);
} else {
$appId = 'files';
$defaultApps = explode(',', \OCP\Config::getSystemValue('defaultapp', 'files'));
// find the first app that is enabled for the current user
foreach ($defaultApps as $defaultApp) {
$defaultApp = OC_App::cleanAppId(strip_tags($defaultApp));
if (OC_App::isEnabled($defaultApp)) {
$appId = $defaultApp;
break;
}
}
$location = $urlGenerator->getAbsoluteURL('/index.php/apps/' . $appId . '/');
}
}
return $location;
}
/**
* Redirect to the user default page
*
* @return void
*/
public static function redirectToDefaultPage() {
$location = self::getDefaultPageUrl();
header('Location: ' . $location);
exit();
}
/**
* 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
$id = 'oc' . \OC::$server->getSecureRandom()->getLowStrengthGenerator()->generate(10, \OCP\Security\ISecureRandom::CHAR_LOWER.\OCP\Security\ISecureRandom::CHAR_DIGITS);
OC_Config::$object->setValue('instanceid', $id);
}
return $id;
}
/**
* Register an get/post call. Important to prevent CSRF attacks.
*
* @return string Generated token.
* @description
* Creates a 'request token' (random) and stores it inside the session.
* Ever subsequent (ajax) request must use such a valid token to succeed,
* otherwise the request will be denied as a protection against CSRF.
* @see OC_Util::isCallRegistered()
*/
public static function callRegister() {
// Check if a token exists
if (!\OC::$server->getSession()->exists('requesttoken')) {
// No valid token found, generate a new one.
$requestToken = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(30);
\OC::$server->getSession()->set('requesttoken', $requestToken);
} else {
// Valid token already exists, send it
$requestToken = \OC::$server->getSession()->get('requesttoken');
}
return ($requestToken);
}
/**
* Check an ajax get/post call if the request token is valid.
*
* @return boolean False if request token is not set or is invalid.
* @see OC_Util::callRegister()
*/
public static function isCallRegistered() {
return \OC::$server->getRequest()->passesCSRFCheck();
}
/**
* Check an ajax get/post call if the request token is valid. Exit if not.
*
* @return void
*/
public static function callCheck() {
if (!OC_Util::isCallRegistered()) {
exit();
}
}
/**
* 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 &$value
* @return string|array an array of sanitized strings or a single sanitized string, depends on the input parameter.
*/
public static function sanitizeHTML(&$value) {
if (is_array($value)) {
array_walk_recursive($value, 'OC_Util::sanitizeHTML');
} else {
//Specify encoding for PHP<5.4
$value = htmlspecialchars((string)$value, ENT_QUOTES, 'UTF-8');
}
return $value;
}
/**
* 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 $encoded;
}
/**
* Check if the .htaccess file is working
*
* @throws OC\HintException If the testfile can't get written.
* @return bool
* @description Check if the .htaccess file is working by creating a test
* file in the data directory and trying to access via http
*/
public static function isHtaccessWorking() {
if (\OC::$CLI || !OC::$server->getConfig()->getSystemValue('check_for_working_htaccess', true)) {
return true;
}
// testdata
$fileName = '/htaccesstest.txt';
$testContent = 'testcontent';
// creating a test file
$testFile = OC::$server->getConfig()->getSystemValue('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);
$content = self::getUrlContent($url);
// cleanup
@unlink($testFile);
/*
* If the content is not equal to test content our .htaccess
* is working as required
*/
return $content !== $testContent;
}
/**
* 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;
}
/**
* Check if it's possible to get the inline annotations
*
* @return bool
*/
public static function isAnnotationsWorking() {
$reflection = new \ReflectionMethod(__METHOD__);
$docs = $reflection->getDocComment();
return (is_string($docs) && strlen($docs) > 50);
}
/**
* Check if the PHP module fileinfo is loaded.
*
* @return bool
*/
public static function fileInfoLoaded() {
return function_exists('finfo_open');
}
/**
* 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;
}
}
}
/**
* 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);
}
/**
* clear all levels of output buffering
*
* @return void
*/
public static function obEnd() {
while (ob_get_level()) {
ob_end_clean();
}
}
/**
* Generates a cryptographic secure pseudo-random string
*
* @param int $length of the random string
* @return string
* @deprecated Use \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate($length); instead
*/
public static function generateRandomBytes($length = 30) {
return \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate($length, \OCP\Security\ISecureRandom::CHAR_LOWER.\OCP\Security\ISecureRandom::CHAR_DIGITS);
}
/**
* Checks if a secure random number generator is available
*
* @return true
* @deprecated Function will be removed in the future and does only return true.
*/
public static function secureRNGAvailable() {
return true;
}
/**
* Get URL content
* @param string $url Url to get content
* @deprecated Use \OC::$server->getHTTPHelper()->getUrlContent($url);
* @throws Exception If the URL does not start with http:// or https://
* @return string of the response or false on error
* This function get the content of a page via curl, if curl is enabled.
* If not, file_get_contents is used.
*/
public static function getUrlContent($url) {
try {
return \OC::$server->getHTTPHelper()->getUrlContent($url);
} catch (\Exception $e) {
throw $e;
}
}
/**
* Checks whether the server is running on Windows
*
* @return bool true if running on Windows, false otherwise
*/
public static function runningOnWindows() {
return (substr(PHP_OS, 0, 3) === "WIN");
}
/**
* Checks whether the server is running on Mac OS X
*
* @return bool true if running on Mac OS X, false otherwise
*/
public static function runningOnMac() {
return (strtoupper(substr(PHP_OS, 0, 6)) === 'DARWIN');
}
/**
* 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;
}
/**
* 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) {
$normalizedValue = normalizer_normalize($value);
if ($normalizedValue === null || $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 string $file file name to check
* @return bool true if the file name is valid, false otherwise
*/
public static function isValidFileName($file) {
$trimmed = trim($file);
if ($trimmed === '') {
return false;
}
if ($trimmed === '.' || $trimmed === '..') {
return false;
}
foreach (str_split($trimmed) as $char) {
if (strpos(\OCP\Constants::FILENAME_INVALID_CHARS, $char) !== false) {
return false;
}
}
return true;
}
/**
* Check whether the instance needs to perform an upgrade,
* either when the core version is higher or any app requires
* an upgrade.
*
* @param \OCP\IConfig $config
* @return bool whether the core or any app needs an upgrade
*/
public static function needUpgrade(\OCP\IConfig $config) {
if ($config->getSystemValue('installed', false)) {
$installedVersion = $config->getSystemValue('version', '0.0.0');
$currentVersion = implode('.', OC_Util::getVersion());
if (version_compare($currentVersion, $installedVersion, '>')) {
return true;
}
// also check for upgrades for apps (independently from the user)
$apps = \OC_App::getEnabledApps(false, true);
$shouldUpgrade = false;
foreach ($apps as $app) {
if (\OC_App::shouldUpgrade($app)) {
$shouldUpgrade = true;
break;
}
}
return $shouldUpgrade;
} else {
return false;
}
}
/**
* @return string
*/
public static function isPhpCharSetUtf8() {
return ini_get('default_charset') === 'UTF-8';
}
}