Chris@0: <?php
Chris@0: 
Chris@0: /**
Chris@0:  * @file
Chris@0:  * Administrative script for running authorized file operations.
Chris@0:  *
Chris@0:  * Using this script, the site owner (the user actually owning the files on the
Chris@0:  * webserver) can authorize certain file-related operations to proceed with
Chris@0:  * elevated privileges, for example to deploy and upgrade modules or themes.
Chris@0:  * Users should not visit this page directly, but instead use an administrative
Chris@0:  * user interface which knows how to redirect the user to this script as part of
Chris@0:  * a multistep process. This script actually performs the selected operations
Chris@0:  * without loading all of Drupal, to be able to more gracefully recover from
Chris@0:  * errors. Access to the script is controlled by a global killswitch in
Chris@0:  * settings.php ('allow_authorize_operations') and via the 'administer software
Chris@0:  * updates' permission.
Chris@0:  *
Chris@0:  * There are helper functions for setting up an operation to run via this
Chris@0:  * system in modules/system/system.module. For more information, see:
Chris@0:  * @link authorize Authorized operation helper functions @endlink
Chris@0:  */
Chris@0: 
Chris@0: use Drupal\Core\DrupalKernel;
Chris@0: use Drupal\Core\Form\EnforcedResponseException;
Chris@0: use Drupal\Core\Url;
Chris@0: use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Symfony\Component\HttpFoundation\Response;
Chris@0: use Drupal\Core\Site\Settings;
Chris@0: 
Chris@0: // Change the directory to the Drupal root.
Chris@0: chdir('..');
Chris@0: 
Chris@0: $autoloader = require_once 'autoload.php';
Chris@0: 
Chris@0: /**
Chris@0:  * Global flag to identify update.php and authorize.php runs.
Chris@0:  *
Chris@0:  * Identifies update.php and authorize.php runs, avoiding unwanted operations
Chris@0:  * such as css/js preprocessing and translation, and solves some theming issues.
Chris@0:  * The flag is checked in other places in Drupal code (not just authorize.php).
Chris@0:  */
Chris@0: const MAINTENANCE_MODE = 'update';
Chris@0: 
Chris@0: /**
Chris@0:  * Determines if the current user is allowed to run authorize.php.
Chris@0:  *
Chris@0:  * The killswitch in settings.php overrides all else, otherwise, the user must
Chris@0:  * have access to the 'administer software updates' permission.
Chris@0:  *
Chris@0:  * @param \Symfony\Component\HttpFoundation\Request $request
Chris@0:  *   The incoming request.
Chris@0:  *
Chris@0:  * @return bool
Chris@0:  *   TRUE if the current user can run authorize.php, and FALSE if not.
Chris@0:  */
Chris@0: function authorize_access_allowed(Request $request) {
Chris@0:   $account = \Drupal::service('authentication')->authenticate($request);
Chris@0:   if ($account) {
Chris@0:     \Drupal::currentUser()->setAccount($account);
Chris@0:   }
Chris@0:   return Settings::get('allow_authorize_operations', TRUE) && \Drupal::currentUser()->hasPermission('administer software updates');
Chris@0: }
Chris@0: 
Chris@0: try {
Chris@0:   $request = Request::createFromGlobals();
Chris@0:   $kernel = DrupalKernel::createFromRequest($request, $autoloader, 'prod');
Chris@0:   $kernel->prepareLegacyRequest($request);
Chris@0: }
Chris@0: catch (HttpExceptionInterface $e) {
Chris@0:   $response = new Response('', $e->getStatusCode());
Chris@0:   $response->prepare($request)->send();
Chris@0:   exit;
Chris@0: }
Chris@0: 
Chris@0: // We have to enable the user and system modules, even to check access and
Chris@0: // display errors via the maintenance theme.
Chris@0: \Drupal::moduleHandler()->addModule('system', 'core/modules/system');
Chris@0: \Drupal::moduleHandler()->addModule('user', 'core/modules/user');
Chris@0: \Drupal::moduleHandler()->load('system');
Chris@0: \Drupal::moduleHandler()->load('user');
Chris@0: 
Chris@0: // Initialize the maintenance theme for this administrative script.
Chris@0: drupal_maintenance_theme();
Chris@0: 
Chris@0: $content = [];
Chris@0: $show_messages = TRUE;
Chris@0: 
Chris@0: $is_allowed = authorize_access_allowed($request);
Chris@0: 
Chris@0: // Build content.
Chris@0: if ($is_allowed) {
Chris@0:   // Load both the Form API and Batch API.
Chris@0:   require_once __DIR__ . '/includes/form.inc';
Chris@0:   require_once __DIR__ . '/includes/batch.inc';
Chris@0: 
Chris@0:   if (isset($_SESSION['authorize_page_title'])) {
Chris@0:     $page_title = $_SESSION['authorize_page_title'];
Chris@0:   }
Chris@0:   else {
Chris@0:     $page_title = t('Authorize file system changes');
Chris@0:   }
Chris@0: 
Chris@0:   // See if we've run the operation and need to display a report.
Chris@0:   if (isset($_SESSION['authorize_results']) && $results = $_SESSION['authorize_results']) {
Chris@0: 
Chris@0:     // Clear the session out.
Chris@0:     unset($_SESSION['authorize_results']);
Chris@0:     unset($_SESSION['authorize_operation']);
Chris@0:     unset($_SESSION['authorize_filetransfer_info']);
Chris@0: 
Chris@0:     if (!empty($results['page_title'])) {
Chris@0:       $page_title = $results['page_title'];
Chris@0:     }
Chris@0:     if (!empty($results['page_message'])) {
Chris@17:       \Drupal::messenger()->addMessage($results['page_message']['message'], $results['page_message']['type']);
Chris@0:     }
Chris@0: 
Chris@0:     $content['authorize_report'] = [
Chris@0:       '#theme' => 'authorize_report',
Chris@0:       '#messages' => $results['messages'],
Chris@0:     ];
Chris@0: 
Chris@0:     if (is_array($results['tasks'])) {
Chris@0:       $links = $results['tasks'];
Chris@0:     }
Chris@0:     else {
Chris@17:       // Since this is being called outside of the primary front controller,
Chris@0:       // the base_url needs to be set explicitly to ensure that links are
Chris@0:       // relative to the site root.
Chris@0:       // @todo Simplify with https://www.drupal.org/node/2548095
Chris@0:       $default_options = [
Chris@0:         '#type' => 'link',
Chris@0:         '#options' => [
Chris@0:           'absolute' => TRUE,
Chris@0:           'base_url' => $GLOBALS['base_url'],
Chris@0:         ],
Chris@0:       ];
Chris@0:       $links = [
Chris@0:         $default_options + [
Chris@0:           '#url' => Url::fromRoute('system.admin'),
Chris@0:           '#title' => t('Administration pages'),
Chris@0:         ],
Chris@0:         $default_options + [
Chris@0:           '#url' => Url::fromRoute('<front>'),
Chris@0:           '#title' => t('Front page'),
Chris@0:         ],
Chris@0:       ];
Chris@0:     }
Chris@0: 
Chris@0:     $content['next_steps'] = [
Chris@0:       '#theme' => 'item_list',
Chris@0:       '#items' => $links,
Chris@0:       '#title' => t('Next steps'),
Chris@0:     ];
Chris@0:   }
Chris@0:   // If a batch is running, let it run.
Chris@0:   elseif ($request->query->has('batch')) {
Chris@0:     $content = _batch_page($request);
Chris@0:     // If _batch_page() returns a response object (likely a JsonResponse for
Chris@0:     // JavaScript-based batch processing), send it immediately.
Chris@0:     if ($content instanceof Response) {
Chris@0:       $content->send();
Chris@0:       exit;
Chris@0:     }
Chris@0:   }
Chris@0:   else {
Chris@0:     if (empty($_SESSION['authorize_operation']) || empty($_SESSION['authorize_filetransfer_info'])) {
Chris@0:       $content = ['#markup' => t('It appears you have reached this page in error.')];
Chris@0:     }
Chris@0:     elseif (!$batch = batch_get()) {
Chris@0:       // We have a batch to process, show the filetransfer form.
Chris@0:       try {
Chris@0:         $content = \Drupal::formBuilder()->getForm('Drupal\Core\FileTransfer\Form\FileTransferAuthorizeForm');
Chris@0:       }
Chris@0:       catch (EnforcedResponseException $e) {
Chris@0:         $e->getResponse()->send();
Chris@0:         exit;
Chris@0:       }
Chris@0:     }
Chris@0:   }
Chris@0:   // We defer the display of messages until all operations are done.
Chris@0:   $show_messages = !(($batch = batch_get()) && isset($batch['running']));
Chris@0: }
Chris@0: else {
Chris@0:   \Drupal::logger('access denied')->warning('authorize.php');
Chris@0:   $page_title = t('Access denied');
Chris@0:   $content = ['#markup' => t('You are not allowed to access this page.')];
Chris@0: }
Chris@0: 
Chris@0: $bare_html_page_renderer = \Drupal::service('bare_html_page_renderer');
Chris@0: $response = $bare_html_page_renderer->renderBarePage($content, $page_title, 'maintenance_page', [
Chris@0:   '#show_messages' => $show_messages,
Chris@0: ]);
Chris@0: if (!$is_allowed) {
Chris@0:   $response->setStatusCode(403);
Chris@0: }
Chris@0: $response->send();