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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @copyright Copyright (c) 2016, Lukas Reschke <lukas@statuscode.ch>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Brice Maron <brice@bmaron.net>
* @author Christoph Wurst <christoph@owncloud.com>
* @author Frank Karlitschek <frank@karlitschek.de>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Kamil Domanski <kdomanski@kdemail.net>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author root "root@oc.(none)"
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC;
use Doctrine\DBAL\Exception\TableExistsException;
use OC\App\AppManager;
use OC\App\AppStore\Bundles\Bundle;
use OC\App\AppStore\Fetcher\AppFetcher;
use OC\App\CodeChecker\CodeChecker;
use OC\App\CodeChecker\EmptyCheck;
use OC\App\CodeChecker\PrivateCheck;
use OC\Archive\TAR;
use OC_App;
use OC_DB;
use OC_Helper;
use OCP\App\IAppManager;
use OCP\Http\Client\IClientService;
use OCP\IConfig;
use OCP\ILogger;
use OCP\ITempManager;
use phpseclib\File\X509;
/**
* This class provides the functionality needed to install, update and remove apps
*/
class Installer {
/** @var AppFetcher */
private $appFetcher;
/** @var IClientService */
private $clientService;
/** @var ITempManager */
private $tempManager;
/** @var ILogger */
private $logger;
/** @var IConfig */
private $config;
/** @var array - for caching the result of app fetcher */
private $apps = null;
/** @var bool|null - for caching the result of the ready status */
private $isInstanceReadyForUpdates = null;
/**
* @param AppFetcher $appFetcher
* @param IClientService $clientService
* @param ITempManager $tempManager
* @param ILogger $logger
* @param IConfig $config
*/
public function __construct(AppFetcher $appFetcher,
IClientService $clientService,
ITempManager $tempManager,
ILogger $logger,
IConfig $config) {
$this->appFetcher = $appFetcher;
$this->clientService = $clientService;
$this->tempManager = $tempManager;
$this->logger = $logger;
$this->config = $config;
}
/**
* Installs an app that is located in one of the app folders already
*
* @param string $appId App to install
* @throws \Exception
* @return string app ID
*/
public function installApp($appId) {
$app = \OC_App::findAppInDirectories($appId);
if($app === false) {
throw new \Exception('App not found in any app directory');
}
$basedir = $app['path'].'/'.$appId;
$info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true);
$l = \OC::$server->getL10N('core');
if(!is_array($info)) {
throw new \Exception(
$l->t('App "%s" cannot be installed because appinfo file cannot be read.',
[$appId]
)
);
}
$version = \OCP\Util::getVersion();
if (!\OC_App::isAppCompatible($version, $info)) {
throw new \Exception(
// TODO $l
$l->t('App "%s" cannot be installed because it is not compatible with this version of the server.',
[$info['name']]
)
);
}
// check for required dependencies
\OC_App::checkAppDependencies($this->config, $l, $info);
\OC_App::registerAutoloading($appId, $basedir);
//install the database
if(is_file($basedir.'/appinfo/database.xml')) {
if (\OC::$server->getAppConfig()->getValue($info['id'], 'installed_version') === null) {
OC_DB::createDbFromStructure($basedir.'/appinfo/database.xml');
} else {
OC_DB::updateDbFromStructure($basedir.'/appinfo/database.xml');
}
} else {
$ms = new \OC\DB\MigrationService($info['id'], \OC::$server->getDatabaseConnection());
$ms->migrate();
}
\OC_App::setupBackgroundJobs($info['background-jobs']);
if(isset($info['settings']) && is_array($info['settings'])) {
\OC::$server->getSettingsManager()->setupSettings($info['settings']);
}
//run appinfo/install.php
self::includeAppScript($basedir . '/appinfo/install.php');
$appData = OC_App::getAppInfo($appId);
OC_App::executeRepairSteps($appId, $appData['repair-steps']['install']);
//set the installed version
\OC::$server->getConfig()->setAppValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id'], false));
\OC::$server->getConfig()->setAppValue($info['id'], 'enabled', 'no');
//set remote/public handlers
foreach($info['remote'] as $name=>$path) {
\OC::$server->getConfig()->setAppValue('core', 'remote_'.$name, $info['id'].'/'.$path);
}
foreach($info['public'] as $name=>$path) {
\OC::$server->getConfig()->setAppValue('core', 'public_'.$name, $info['id'].'/'.$path);
}
OC_App::setAppTypes($info['id']);
return $info['id'];
}
/**
* @brief checks whether or not an app is installed
* @param string $app app
* @returns bool
*
* Checks whether or not an app is installed, i.e. registered in apps table.
*/
public static function isInstalled( $app ) {
return (\OC::$server->getConfig()->getAppValue($app, "installed_version", null) !== null);
}
/**
* Updates the specified app from the appstore
*
* @param string $appId
* @return bool
*/
public function updateAppstoreApp($appId) {
if($this->isUpdateAvailable($appId)) {
try {
$this->downloadApp($appId);
} catch (\Exception $e) {
$this->logger->error($e->getMessage(), ['app' => 'core']);
return false;
}
return OC_App::updateApp($appId);
}
return false;
}
/**
* Downloads an app and puts it into the app directory
*
* @param string $appId
*
* @throws \Exception If the installation was not successful
*/
public function downloadApp($appId) {
$appId = strtolower($appId);
$apps = $this->appFetcher->get();
foreach($apps as $app) {
if($app['id'] === $appId) {
// Load the certificate
$certificate = new X509();
$certificate->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
$loadedCertificate = $certificate->loadX509($app['certificate']);
// Verify if the certificate has been revoked
$crl = new X509();
$crl->loadCA(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crt'));
$crl->loadCRL(file_get_contents(__DIR__ . '/../../resources/codesigning/root.crl'));
if($crl->validateSignature() !== true) {
throw new \Exception('Could not validate CRL signature');
}
$csn = $loadedCertificate['tbsCertificate']['serialNumber']->toString();
$revoked = $crl->getRevoked($csn);
if ($revoked !== false) {
throw new \Exception(
sprintf(
'Certificate "%s" has been revoked',
$csn
)
);
}
// Verify if the certificate has been issued by the Nextcloud Code Authority CA
if($certificate->validateSignature() !== true) {
throw new \Exception(
sprintf(
'App with id %s has a certificate not issued by a trusted Code Signing Authority',
$appId
)
);
}
// Verify if the certificate is issued for the requested app id
$certInfo = openssl_x509_parse($app['certificate']);
if(!isset($certInfo['subject']['CN'])) {
throw new \Exception(
sprintf(
'App with id %s has a cert with no CN',
$appId
)
);
}
if($certInfo['subject']['CN'] !== $appId) {
throw new \Exception(
sprintf(
'App with id %s has a cert issued to %s',
$appId,
$certInfo['subject']['CN']
)
);
}
// Download the release
$tempFile = $this->tempManager->getTemporaryFile('.tar.gz');
$client = $this->clientService->newClient();
$client->get($app['releases'][0]['download'], ['save_to' => $tempFile]);
// Check if the signature actually matches the downloaded content
$certificate = openssl_get_publickey($app['certificate']);
$verified = (bool)openssl_verify(file_get_contents($tempFile), base64_decode($app['releases'][0]['signature']), $certificate, OPENSSL_ALGO_SHA512);
openssl_free_key($certificate);
if($verified === true) {
// Seems to match, let's proceed
$extractDir = $this->tempManager->getTemporaryFolder();
$archive = new TAR($tempFile);
if($archive) {
if (!$archive->extract($extractDir)) {
throw new \Exception(
sprintf(
'Could not extract app %s',
$appId
)
);
}
$allFiles = scandir($extractDir);
$folders = array_diff($allFiles, ['.', '..']);
$folders = array_values($folders);
if(count($folders) > 1) {
throw new \Exception(
sprintf(
'Extracted app %s has more than 1 folder',
$appId
)
);
}
// Check if appinfo/info.xml has the same app ID as well
$loadEntities = libxml_disable_entity_loader(false);
$xml = simplexml_load_file($extractDir . '/' . $folders[0] . '/appinfo/info.xml');
libxml_disable_entity_loader($loadEntities);
if((string)$xml->id !== $appId) {
throw new \Exception(
sprintf(
'App for id %s has a wrong app ID in info.xml: %s',
$appId,
(string)$xml->id
)
);
}
// Check if the version is lower than before
$currentVersion = OC_App::getAppVersion($appId);
$newVersion = (string)$xml->version;
if(version_compare($currentVersion, $newVersion) === 1) {
throw new \Exception(
sprintf(
'App for id %s has version %s and tried to update to lower version %s',
$appId,
$currentVersion,
$newVersion
)
);
}
$baseDir = OC_App::getInstallPath() . '/' . $appId;
// Remove old app with the ID if existent
OC_Helper::rmdirr($baseDir);
// Move to app folder
if(@mkdir($baseDir)) {
$extractDir .= '/' . $folders[0];
OC_Helper::copyr($extractDir, $baseDir);
}
OC_Helper::copyr($extractDir, $baseDir);
OC_Helper::rmdirr($extractDir);
return;
} else {
throw new \Exception(
sprintf(
'Could not extract app with ID %s to %s',
$appId,
$extractDir
)
);
}
} else {
// Signature does not match
throw new \Exception(
sprintf(
'App with id %s has invalid signature',
$appId
)
);
}
}
}
throw new \Exception(
sprintf(
'Could not download app %s',
$appId
)
);
}
/**
* Check if an update for the app is available
*
* @param string $appId
* @return string|false false or the version number of the update
*/
public function isUpdateAvailable($appId) {
if ($this->isInstanceReadyForUpdates === null) {
$installPath = OC_App::getInstallPath();
if ($installPath === false || $installPath === null) {
$this->isInstanceReadyForUpdates = false;
} else {
$this->isInstanceReadyForUpdates = true;
}
}
if ($this->isInstanceReadyForUpdates === false) {
return false;
}
if ($this->isInstalledFromGit($appId) === true) {
return false;
}
if ($this->apps === null) {
$this->apps = $this->appFetcher->get();
}
foreach($this->apps as $app) {
if($app['id'] === $appId) {
$currentVersion = OC_App::getAppVersion($appId);
$newestVersion = $app['releases'][0]['version'];
if (version_compare($newestVersion, $currentVersion, '>')) {
return $newestVersion;
} else {
return false;
}
}
}
return false;
}
/**
* Check if app has been installed from git
* @param string $name name of the application to remove
* @return boolean
*
* The function will check if the path contains a .git folder
*/
private function isInstalledFromGit($appId) {
$app = \OC_App::findAppInDirectories($appId);
if($app === false) {
return false;
}
$basedir = $app['path'].'/'.$appId;
return file_exists($basedir.'/.git/');
}
/**
* Check if app is already downloaded
* @param string $name name of the application to remove
* @return boolean
*
* The function will check if the app is already downloaded in the apps repository
*/
public function isDownloaded($name) {
foreach(\OC::$APPSROOTS as $dir) {
$dirToTest = $dir['path'];
$dirToTest .= '/';
$dirToTest .= $name;
$dirToTest .= '/';
if (is_dir($dirToTest)) {
return true;
}
}
return false;
}
/**
* Removes an app
* @param string $appId ID of the application to remove
* @return boolean
*
*
* This function works as follows
* -# call uninstall repair steps
* -# removing the files
*
* The function will not delete preferences, tables and the configuration,
* this has to be done by the function oc_app_uninstall().
*/
public function removeApp($appId) {
if($this->isDownloaded( $appId )) {
$appDir = OC_App::getInstallPath() . '/' . $appId;
OC_Helper::rmdirr($appDir);
return true;
}else{
\OCP\Util::writeLog('core', 'can\'t remove app '.$appId.'. It is not installed.', \OCP\Util::ERROR);
return false;
}
}
/**
* Installs the app within the bundle and marks the bundle as installed
*
* @param Bundle $bundle
* @throws \Exception If app could not get installed
*/
public function installAppBundle(Bundle $bundle) {
$appIds = $bundle->getAppIdentifiers();
foreach($appIds as $appId) {
if(!$this->isDownloaded($appId)) {
$this->downloadApp($appId);
}
$this->installApp($appId);
$app = new OC_App();
$app->enable($appId);
}
$bundles = json_decode($this->config->getAppValue('core', 'installed.bundles', json_encode([])), true);
$bundles[] = $bundle->getIdentifier();
$this->config->setAppValue('core', 'installed.bundles', json_encode($bundles));
}
/**
* Installs shipped apps
*
* This function installs all apps found in the 'apps' directory that should be enabled by default;
* @param bool $softErrors When updating we ignore errors and simply log them, better to have a
* working ownCloud at the end instead of an aborted update.
* @return array Array of error messages (appid => Exception)
*/
public static function installShippedApps($softErrors = false) {
$errors = [];
foreach(\OC::$APPSROOTS as $app_dir) {
if($dir = opendir( $app_dir['path'] )) {
while( false !== ( $filename = readdir( $dir ))) {
if( substr( $filename, 0, 1 ) != '.' and is_dir($app_dir['path']."/$filename") ) {
if( file_exists( $app_dir['path']."/$filename/appinfo/info.xml" )) {
if(!Installer::isInstalled($filename)) {
$info=OC_App::getAppInfo($filename);
$enabled = isset($info['default_enable']);
if (($enabled || in_array($filename, \OC::$server->getAppManager()->getAlwaysEnabledApps()))
&& \OC::$server->getConfig()->getAppValue($filename, 'enabled') !== 'no') {
if ($softErrors) {
try {
Installer::installShippedApp($filename);
} catch (HintException $e) {
if ($e->getPrevious() instanceof TableExistsException) {
$errors[$filename] = $e;
continue;
}
throw $e;
}
} else {
Installer::installShippedApp($filename);
}
\OC::$server->getConfig()->setAppValue($filename, 'enabled', 'yes');
}
}
}
}
}
closedir( $dir );
}
}
return $errors;
}
/**
* install an app already placed in the app folder
* @param string $app id of the app to install
* @return integer
*/
public static function installShippedApp($app) {
//install the database
$appPath = OC_App::getAppPath($app);
\OC_App::registerAutoloading($app, $appPath);
if(is_file("$appPath/appinfo/database.xml")) {
try {
OC_DB::createDbFromStructure("$appPath/appinfo/database.xml");
} catch (TableExistsException $e) {
throw new HintException(
'Failed to enable app ' . $app,
'Please ask for help via one of our <a href="https://nextcloud.com/support/" target="_blank" rel="noreferrer noopener">support channels</a>.',
0, $e
);
}
} else {
$ms = new \OC\DB\MigrationService($app, \OC::$server->getDatabaseConnection());
$ms->migrate();
}
//run appinfo/install.php
self::includeAppScript("$appPath/appinfo/install.php");
$info = OC_App::getAppInfo($app);
if (is_null($info)) {
return false;
}
\OC_App::setupBackgroundJobs($info['background-jobs']);
OC_App::executeRepairSteps($app, $info['repair-steps']['install']);
$config = \OC::$server->getConfig();
$config->setAppValue($app, 'installed_version', OC_App::getAppVersion($app));
if (array_key_exists('ocsid', $info)) {
$config->setAppValue($app, 'ocsid', $info['ocsid']);
}
//set remote/public handlers
foreach($info['remote'] as $name=>$path) {
$config->setAppValue('core', 'remote_'.$name, $app.'/'.$path);
}
foreach($info['public'] as $name=>$path) {
$config->setAppValue('core', 'public_'.$name, $app.'/'.$path);
}
OC_App::setAppTypes($info['id']);
if(isset($info['settings']) && is_array($info['settings'])) {
// requires that autoloading was registered for the app,
// as happens before running the install.php some lines above
\OC::$server->getSettingsManager()->setupSettings($info['settings']);
}
return $info['id'];
}
/**
* @param string $script
*/
private static function includeAppScript($script) {
if ( file_exists($script) ){
include $script;
}
}
}