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 use Friendica\Security\OAuth;
  30
  31 /**
  32  * @see https://docs.joinmastodon.org/spec/oauth/
  33  * @see https://aaronparecki.com/oauth-2-simplified/
  34  */
  35 class Token extends BaseApi
  36 {
  37         protected function post(array $request = [])
  38         {
  39                 $request = $this->getRequest([
  40                         'client_id'     => '', // Client ID, obtained during app registration
  41                         'client_secret' => '', // Client secret, obtained during app registration
  42                         'redirect_uri'  => '', // Set a URI to redirect the user to. If this parameter is set to "urn:ietf:wg:oauth:2.0:oob" then the token will be shown instead. Must match one of the redirect URIs declared during app registration.
  43                         'scope'         => 'read', // List of requested OAuth scopes, separated by spaces. Must be a subset of scopes declared during app registration. If not provided, defaults to "read".
  44                         'code'          => '', // A user authorization code, obtained via /oauth/authorize
  45                         'grant_type'    => '', // Set equal to "authorization_code" if code is provided in order to gain user-level access. Otherwise, set equal to "client_credentials" to obtain app-level access only.
  46                 ], $request);
  47
  48                 // AndStatus transmits the client data in the AUTHORIZATION header field, see https://github.com/andstatus/andstatus/issues/530
  49                 $authorization = $_SERVER['HTTP_AUTHORIZATION'] ?? '';
  50                 if (empty($authorization)) {
  51                         // workaround for HTTP-auth in CGI mode
  52                         $authorization = $_SERVER['REDIRECT_REMOTE_USER'] ?? '';
  53                 }
  54
  55                 if (empty($request['client_id']) && substr($authorization, 0, 6) == 'Basic ') {
  56                         $datapair = explode(':', base64_decode(trim(substr($authorization, 6))));
  57                         if (count($datapair) == 2) {
  58                                 $request['client_id']     = $datapair[0];
  59                                 $request['client_secret'] = $datapair[1];
  60                         }
  61                 }
  62
  63                 if (empty($request['client_id']) || empty($request['client_secret'])) {
  64                         Logger::warning('Incomplete request data', ['request' => $_REQUEST]);
  65                         DI::mstdnError()->UnprocessableEntity(DI::l10n()->t('Incomplete request data'));
  66                 }
  67
  68                 $application = OAuth::getApplication($request['client_id'], $request['client_secret'], $request['redirect_uri']);
  69                 if (empty($application)) {
  70                         DI::mstdnError()->UnprocessableEntity();
  71                 }
  72
  73                 if ($request['grant_type'] == 'client_credentials') {
  74                         // the "client_credentials" are used as a token for the application itself.
  75                         // see https://aaronparecki.com/oauth-2-simplified/#client-credentials
  76                         $token = OAuth::createTokenForUser($application, 0, '');
  77                 } elseif ($request['grant_type'] == 'authorization_code') {
  78                         // For security reasons only allow freshly created tokens
  79                         $condition = ["`redirect_uri` = ? AND `id` = ? AND `code` = ? AND `created_at` > UTC_TIMESTAMP() - INTERVAL ? MINUTE",
  80                                 $request['redirect_uri'], $application['id'], $request['code'], 5];
  81
  82                         $token = DBA::selectFirst('application-view', ['access_token', 'created_at'], $condition);
  83                         if (!DBA::isResult($token)) {
  84                                 Logger::warning('Token not found or outdated', $condition);
  85                                 DI::mstdnError()->Unauthorized();
  86                         }
  87                 } else {
  88                         Logger::warning('Unsupported or missing grant type', ['request' => $_REQUEST]);
  89                         DI::mstdnError()->UnprocessableEntity(DI::l10n()->t('Unsupported or missing grant type'));
  90                 }
  91
  92                 $object = new \Friendica\Object\Api\Mastodon\Token($token['access_token'], 'Bearer', $application['scopes'], $token['created_at']);
  93
  94                 System::jsonExit($object->toArray());
  95         }
  96 }