src/Module/OAuth/Token.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module\OAuth;
  23
  24 use Friendica\Core\Logger;
  25 use Friendica\Core\System;
  26 use Friendica\Database\DBA;
  27 use Friendica\DI;
  28 use Friendica\Module\BaseApi;
  29
  30 /**
  31  * @see https://docs.joinmastodon.org/spec/oauth/
  32  * @see https://aaronparecki.com/oauth-2-simplified/
  33  */
  34 class Token extends BaseApi
  35 {
  36         public static function post(array $parameters = [])
  37         {
  38                 $grant_type    = $_REQUEST['grant_type'] ?? '';
  39                 $code          = $_REQUEST['code'] ?? '';
  40                 $redirect_uri  = $_REQUEST['redirect_uri'] ?? '';
  41                 $client_id     = $_REQUEST['client_id'] ?? '';
  42                 $client_secret = $_REQUEST['client_secret'] ?? '';
  43
  44                 // AndStatus transmits the client data in the AUTHORIZATION header field, see https://github.com/andstatus/andstatus/issues/530
  45                 if (empty($client_id) && !empty($_SERVER['HTTP_AUTHORIZATION']) && (substr($_SERVER['HTTP_AUTHORIZATION'], 0, 6) == 'Basic ')) {
  46                         $datapair = explode(':', base64_decode(trim(substr($_SERVER['HTTP_AUTHORIZATION'], 6))));
  47                         if (count($datapair) == 2) {
  48                                 $client_id     = $datapair[0];
  49                                 $client_secret = $datapair[1];
  50                         }
  51                 }
  52
  53                 if (empty($client_id) || empty($client_secret)) {
  54                         Logger::warning('Incomplete request data', ['request' => $_REQUEST]);
  55                         DI::mstdnError()->UnprocessableEntity(DI::l10n()->t('Incomplete request data'));
  56                 }
  57
  58                 $application = self::getApplication($client_id, $client_secret, $redirect_uri);
  59                 if (empty($application)) {
  60                         DI::mstdnError()->UnprocessableEntity();
  61                 }
  62
  63                 if ($grant_type == 'client_credentials') {
  64                         // the "client_credentials" are used as a token for the application itself.
  65                         // see https://aaronparecki.com/oauth-2-simplified/#client-credentials
  66                         $token = self::createTokenForUser($application, 0, '');
  67                 } elseif ($grant_type == 'authorization_code') {
  68                         // For security reasons only allow freshly created tokens
  69                         $condition = ["`redirect_uri` = ? AND `id` = ? AND `code` = ? AND `created_at` > UTC_TIMESTAMP() - INTERVAL ? MINUTE",
  70                                 $redirect_uri, $application['id'], $code, 5];
  71
  72                         $token = DBA::selectFirst('application-view', ['access_token', 'created_at'], $condition);
  73                         if (!DBA::isResult($token)) {
  74                                 Logger::warning('Token not found or outdated', $condition);
  75                                 DI::mstdnError()->Unauthorized();
  76                         }
  77                 } else {
  78                         Logger::warning('Unsupported or missing grant type', ['request' => $_REQUEST]);
  79                         DI::mstdnError()->UnprocessableEntity(DI::l10n()->t('Unsupported or missing grant type'));
  80                 }
  81
  82                 $object = new \Friendica\Object\Api\Mastodon\Token($token['access_token'], 'Bearer', $application['scopes'], $token['created_at']);
  83
  84                 System::jsonExit($object->toArray());
  85         }
  86 }