3 * StatusNet, the distributed open-source microblogging tool
5 * Base class for API actions that require authentication
9 * LICENCE: This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Affero General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Affero General Public License for more details.
19 * You should have received a copy of the GNU Affero General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author Adrian Lang <mail@adrianlang.de>
25 * @author Brenda Wallace <shiny@cpan.org>
26 * @author Craig Andrews <candrews@integralblue.com>
27 * @author Dan Moore <dan@moore.cx>
28 * @author Evan Prodromou <evan@status.net>
29 * @author mEDI <medi@milaro.net>
30 * @author Sarven Capadisli <csarven@status.net>
31 * @author Zach Copley <zach@status.net>
32 * @copyright 2009 StatusNet, Inc.
33 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
34 * @link http://status.net/
37 if (!defined('STATUSNET')) {
41 require_once INSTALLDIR . '/lib/api.php';
42 require_once INSTALLDIR . '/lib/apioauth.php';
45 * Actions extending this class will require auth
49 * @author Zach Copley <zach@status.net>
50 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
51 * @link http://status.net/
54 class ApiAuthAction extends ApiAction
57 var $oauth_access_type;
61 * Take arguments for running, and output basic auth header if needed
63 * @param array $args $_REQUEST args
65 * @return boolean success flag
69 function prepare($args)
71 parent::prepare($args);
73 if ($this->requiresAuth()) {
75 $this->consumer_key = $this->arg('oauth_consumer_key');
76 $this->access_token = $this->arg('oauth_token');
78 if (!empty($this->access_token)) {
79 $this->checkOAuthRequest();
81 $this->checkBasicAuthUser();
82 // By default, all basic auth users have read and write access
84 $this->access = self::READ_WRITE;
91 function handle($args)
93 parent::handle($args);
96 function checkOAuthRequest()
98 common_debug("We have an OAuth request.");
100 $datastore = new ApiStatusNetOAuthDataStore();
101 $server = new OAuthServer($datastore);
102 $hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
104 $server->add_signature_method($hmac_method);
106 ApiOauthAction::cleanRequest();
110 $req = OAuthRequest::from_request();
111 $server->verify_request($req);
113 $app = Oauth_application::getByConsumerKey($this->consumer_key);
117 // this should really not happen
119 "Couldn't find the OAuth app for consumer key: $this->consumer_key");
121 throw new OAuthException('No application for that consumer key.');
124 // set the source attr
126 $this->oauth_source = $app->name;
128 $appUser = Oauth_application_user::staticGet('token',
129 $this->access_token);
131 // XXX: check that app->id and appUser->application_id and consumer all
134 if (!empty($appUser)) {
136 // read or read-write
137 $this->oauth_access_type = $appUser->access_type;
139 // If access_type == 0 we have either a request token
140 // or a bad / revoked access token
142 if ($this->oauth_access_type != 0) {
144 // Set the read or read-write access for the api call
145 $this->access = ($appUser->access_type & Oauth_application::$writeAccess)
146 ? self::READ_WRITE : self::READ_ONLY;
148 if (Event::handle('StartSetApiUser', array(&$user))) {
149 $this->auth_user = User::staticGet('id', $appUser->profile_id);
150 Event::handle('EndSetApiUser', array($user));
153 $msg = "API OAuth authentication for user '%s' (id: %d) on behalf of " .
154 "application '%s' (id: %d).";
156 common_log(LOG_INFO, sprintf($msg,
157 $this->auth_user->nickname,
158 $this->auth_user->id,
163 throw new OAuthException('Bad access token.');
167 // also should not happen
168 throw new OAuthException('No user for that token.');
171 } catch (OAuthException $e) {
172 common_log(LOG_WARN, 'API OAuthException - ' . $e->getMessage());
173 common_debug(var_export($req, true));
174 $this->showOAuthError($e->getMessage());
179 function showOAuthError($msg)
181 header('HTTP/1.1 401 Unauthorized');
182 header('Content-Type: text/html; charset=utf-8');
187 * Does this API resource require authentication?
189 * @return boolean true
192 function requiresAuth()
198 * Check for a user specified via HTTP basic auth. If there isn't
199 * one, try to get one by outputting the basic auth header.
201 * @return boolean true or false
204 function checkBasicAuthUser()
206 $this->basicAuthProcessHeader();
208 $realm = common_config('site', 'name') . ' API';
210 if (!isset($this->auth_user)) {
211 header('WWW-Authenticate: Basic realm="' . $realm . '"');
213 // show error if the user clicks 'cancel'
215 $this->showBasicAuthError();
219 $nickname = $this->auth_user;
220 $password = $this->auth_pw;
221 $user = common_check_user($nickname, $password);
222 if (Event::handle('StartSetApiUser', array(&$user))) {
223 $this->auth_user = $user;
224 Event::handle('EndSetApiUser', array($user));
227 if (empty($this->auth_user)) {
229 // basic authentication failed
231 list($proxy, $ip) = common_client_ip();
234 'Failed API auth attempt, nickname = ' .
235 "$nickname, proxy = $proxy, ip = $ip."
237 $this->showBasicAuthError();
246 * Read the HTTP headers and set the auth user. Decodes HTTP_AUTHORIZATION
247 * param to support basic auth when PHP is running in CGI mode.
252 function basicAuthProcessHeader()
254 if (isset($_SERVER['AUTHORIZATION'])
255 || isset($_SERVER['HTTP_AUTHORIZATION'])
257 $authorization_header = isset($_SERVER['HTTP_AUTHORIZATION'])
258 ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['AUTHORIZATION'];
261 if (isset($_SERVER['PHP_AUTH_USER'])) {
262 $this->auth_user = $_SERVER['PHP_AUTH_USER'];
263 $this->auth_pw = $_SERVER['PHP_AUTH_PW'];
264 } elseif (isset($authorization_header)
265 && strstr(substr($authorization_header, 0, 5), 'Basic')) {
267 // decode the HTTP_AUTHORIZATION header on php-cgi server self
268 // on fcgid server the header name is AUTHORIZATION
270 $auth_hash = base64_decode(substr($authorization_header, 6));
271 list($this->auth_user, $this->auth_pw) = explode(':', $auth_hash);
273 // set all to null on a empty basic auth request
275 if ($this->auth_user == "") {
276 $this->auth_user = null;
277 $this->auth_pw = null;
280 $this->auth_user = null;
281 $this->auth_pw = null;
286 * Output an authentication error message. Use XML or JSON if one
287 * of those formats is specified, otherwise output plain text
292 function showBasicAuthError()
294 header('HTTP/1.1 401 Unauthorized');
295 $msg = 'Could not authenticate you.';
297 if ($this->format == 'xml') {
298 header('Content-Type: application/xml; charset=utf-8');
300 $this->elementStart('hash');
301 $this->element('error', null, $msg);
302 $this->element('request', null, $_SERVER['REQUEST_URI']);
303 $this->elementEnd('hash');
305 } elseif ($this->format == 'json') {
306 header('Content-Type: application/json; charset=utf-8');
307 $error_array = array('error' => $msg,
308 'request' => $_SERVER['REQUEST_URI']);
309 print(json_encode($error_array));
311 header('Content-type: text/plain');