365 lines
12 KiB
PHP
365 lines
12 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica;
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use Friendica\App\Router;
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use Friendica\Capabilities\ICanHandleRequests;
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use Friendica\Capabilities\ICanReadAndWriteToResponds;
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use Friendica\Capabilities\IRespondToRequests;
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use Friendica\Core\Hook;
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use Friendica\Core\L10n;
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use Friendica\Core\Logger;
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use Friendica\Model\User;
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use Friendica\Module\Response;
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use Friendica\Module\Special\HTTPException as ModuleHTTPException;
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use Friendica\Network\HTTPException;
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use Friendica\Util\Profiler;
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use Psr\Log\LoggerInterface;
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/**
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* All modules in Friendica should extend BaseModule, although not all modules
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* need to extend all the methods described here
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*
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* The filename of the module in src/Module needs to match the class name
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* exactly to make the module available.
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*
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* @author Hypolite Petovan <hypolite@mrpetovan.com>
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*/
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abstract class BaseModule implements ICanHandleRequests
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{
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/** @var array */
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protected $parameters = [];
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/** @var L10n */
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protected $l10n;
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/** @var App\BaseURL */
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protected $baseUrl;
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/** @var App\Arguments */
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protected $args;
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/** @var LoggerInterface */
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protected $logger;
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/** @var Profiler */
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protected $profiler;
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/** @var array */
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protected $server;
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/** @var ICanReadAndWriteToResponds */
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protected $response;
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public function __construct(L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
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{
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$this->parameters = $parameters;
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$this->l10n = $l10n;
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$this->baseUrl = $baseUrl;
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$this->args = $args;
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$this->logger = $logger;
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$this->profiler = $profiler;
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$this->server = $server;
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$this->response = $response;
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}
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/**
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* Wraps the L10n::t() function for Modules
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*
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* @see L10n::t()
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*/
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protected function t(string $s, ...$args): string
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{
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return $this->l10n->t($s, ...$args);
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}
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/**
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* Wraps the L10n::tt() function for Modules
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*
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* @see L10n::tt()
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*/
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protected function tt(string $singular, string $plurarl, int $count): string
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{
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return $this->l10n->tt($singular, $plurarl, $count);
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}
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/**
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* Module GET method to display raw content from technical endpoints
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*
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* Extend this method if the module is supposed to return communication data,
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* e.g. from protocol implementations.
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*
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* @param string[] $request The $_REQUEST content
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*/
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protected function rawContent(array $request = [])
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{
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// echo '';
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// exit;
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}
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/**
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* Module GET method to display any content
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*
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* Extend this method if the module is supposed to return any display
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* through a GET request. It can be an HTML page through templating or a
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* XML feed or a JSON output.
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*
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* @param string[] $request The $_REQUEST content
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*/
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protected function content(array $request = []): string
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{
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return '';
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}
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/**
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* Module DELETE method to process submitted data
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*
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* Extend this method if the module is supposed to process DELETE requests.
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* Doesn't display any content
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*/
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protected function delete()
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{
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}
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/**
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* Module PATCH method to process submitted data
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*
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* Extend this method if the module is supposed to process PATCH requests.
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* Doesn't display any content
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*/
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protected function patch()
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{
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}
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/**
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* Module POST method to process submitted data
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*
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* Extend this method if the module is supposed to process POST requests.
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* Doesn't display any content
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*
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* @param string[] $request The $_REQUEST content
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* @param string[] $post The $_POST content
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*
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*/
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protected function post(array $request = [], array $post = [])
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{
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// $this->baseUrl->redirect('module');
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}
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/**
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* Module PUT method to process submitted data
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*
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* Extend this method if the module is supposed to process PUT requests.
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* Doesn't display any content
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*/
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protected function put()
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{
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}
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/** Gets the name of the current class */
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public function getClassName(): string
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{
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return static::class;
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}
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/**
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* {@inheritDoc}
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*/
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public function run(array $post = [], array $request = []): IRespondToRequests
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{
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// @see https://github.com/tootsuite/mastodon/blob/c3aef491d66aec743a3a53e934a494f653745b61/config/initializers/cors.rb
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if (substr($request['pagename'] ?? '', 0, 12) == '.well-known/') {
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Headers: *');
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header('Access-Control-Allow-Methods: ' . Router::GET);
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header('Access-Control-Allow-Credentials: false');
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} elseif (substr($request['pagename'] ?? '', 0, 8) == 'profile/') {
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Headers: *');
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header('Access-Control-Allow-Methods: ' . Router::GET);
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header('Access-Control-Allow-Credentials: false');
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} elseif (substr($request['pagename'] ?? '', 0, 4) == 'api/') {
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Headers: *');
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header('Access-Control-Allow-Methods: ' . implode(',', Router::ALLOWED_METHODS));
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header('Access-Control-Allow-Credentials: false');
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header('Access-Control-Expose-Headers: Link');
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} elseif (substr($request['pagename'] ?? '', 0, 11) == 'oauth/token') {
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Headers: *');
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header('Access-Control-Allow-Methods: ' . Router::POST);
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header('Access-Control-Allow-Credentials: false');
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}
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$placeholder = '';
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$this->profiler->set(microtime(true), 'ready');
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$timestamp = microtime(true);
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Core\Hook::callAll($this->args->getModuleName() . '_mod_init', $placeholder);
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$this->profiler->set(microtime(true) - $timestamp, 'init');
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$this->response->setType(IRespondToRequests::TYPE_CONTENT);
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switch ($this->server['REQUEST_METHOD']) {
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case Router::DELETE:
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$this->response->setType(IRespondToRequests::TYPE_DELETE);
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$this->delete();
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break;
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case Router::PATCH:
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$this->response->setType(IRespondToRequests::TYPE_PATCH);
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$this->patch();
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break;
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case Router::POST:
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Core\Hook::callAll($this->args->getModuleName() . '_mod_post', $post);
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$this->response->setType(IRespondToRequests::TYPE_POST);
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$this->post($request, $post);
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break;
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case Router::PUT:
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$this->response->setType(IRespondToRequests::TYPE_PUT);
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$this->put();
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break;
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default:
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// "rawContent" is especially meant for technical endpoints.
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// This endpoint doesn't need any theme initialization or other comparable stuff.
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$this->rawContent($request);
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try {
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$arr = ['content' => ''];
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Hook::callAll(static::class . '_mod_content', $arr);
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$this->response->addContent($arr['content']);
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$this->response->addContent($this->content($_REQUEST));
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} catch (HTTPException $e) {
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$this->response->addContent((new ModuleHTTPException())->content($e));
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}
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break;
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}
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return $this->response;
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}
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/*
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* Functions used to protect against Cross-Site Request Forgery
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* The security token has to base on at least one value that an attacker can't know - here it's the session ID and the private key.
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* In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
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* or if the security token is used for ajax-calls that happen several times), but only valid for a certain amount of time (3hours).
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* The "typename" separates the security tokens of different types of forms. This could be relevant in the following case:
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* A security token is used to protect a link from CSRF (e.g. the "delete this profile"-link).
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* If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
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* Actually, important actions should not be triggered by Links / GET-Requests at all, but sometimes they still are,
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* so this mechanism brings in some damage control (the attacker would be able to forge a request to a form of this type, but not to forms of other types).
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*/
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public static function getFormSecurityToken($typename = '')
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{
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$user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
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$timestamp = time();
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$sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $timestamp . $typename);
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return $timestamp . '.' . $sec_hash;
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}
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public static function checkFormSecurityToken($typename = '', $formname = 'form_security_token')
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{
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$hash = null;
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if (!empty($_REQUEST[$formname])) {
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/// @TODO Careful, not secured!
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$hash = $_REQUEST[$formname];
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}
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if (!empty($_SERVER['HTTP_X_CSRF_TOKEN'])) {
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/// @TODO Careful, not secured!
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$hash = $_SERVER['HTTP_X_CSRF_TOKEN'];
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}
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if (empty($hash)) {
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return false;
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}
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$max_livetime = 10800; // 3 hours
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$user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
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$x = explode('.', $hash);
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if (time() > (intval($x[0]) + $max_livetime)) {
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return false;
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}
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$sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $x[0] . $typename);
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return ($sec_hash == $x[1]);
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}
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public static function getFormSecurityStandardErrorMessage()
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{
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return DI::l10n()->t("The form security token was not correct. This probably happened because the form has been opened for too long \x28>3 hours\x29 before submitting it.") . EOL;
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}
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public static function checkFormSecurityTokenRedirectOnError($err_redirect, $typename = '', $formname = 'form_security_token')
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{
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if (!self::checkFormSecurityToken($typename, $formname)) {
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Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
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Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
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notice(self::getFormSecurityStandardErrorMessage());
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DI::baseUrl()->redirect($err_redirect);
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}
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}
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public static function checkFormSecurityTokenForbiddenOnError($typename = '', $formname = 'form_security_token')
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{
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if (!self::checkFormSecurityToken($typename, $formname)) {
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Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
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Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
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throw new \Friendica\Network\HTTPException\ForbiddenException();
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}
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}
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protected static function getContactFilterTabs(string $baseUrl, string $current, bool $displayCommonTab)
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{
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$tabs = [
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[
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'label' => DI::l10n()->t('All contacts'),
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'url' => $baseUrl . '/contacts',
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'sel' => !$current || $current == 'all' ? 'active' : '',
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],
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[
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'label' => DI::l10n()->t('Followers'),
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'url' => $baseUrl . '/contacts/followers',
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'sel' => $current == 'followers' ? 'active' : '',
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],
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[
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'label' => DI::l10n()->t('Following'),
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'url' => $baseUrl . '/contacts/following',
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'sel' => $current == 'following' ? 'active' : '',
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],
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[
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'label' => DI::l10n()->t('Mutual friends'),
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'url' => $baseUrl . '/contacts/mutuals',
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'sel' => $current == 'mutuals' ? 'active' : '',
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],
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];
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if ($displayCommonTab) {
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$tabs[] = [
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'label' => DI::l10n()->t('Common'),
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'url' => $baseUrl . '/contacts/common',
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'sel' => $current == 'common' ? 'active' : '',
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];
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}
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return $tabs;
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}
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}
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