From de5ff19713a990af197330dd8e4314de465ffe76 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Fri, 25 Sep 2009 16:58:35 -0700
Subject: Moved basic auth stuff into its own classes

---
 lib/apiauth.php | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 lib/apiauth.php

(limited to 'lib/apiauth.php')

diff --git a/lib/apiauth.php b/lib/apiauth.php
new file mode 100644
index 000000000..501d3de10
--- /dev/null
+++ b/lib/apiauth.php
@@ -0,0 +1,131 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Base class for API actions that require authentication
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  API
+ * @package   StatusNet
+ * @author    Zach Copley <zach@status.net>
+ * @copyright 2009 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    exit(1);
+}
+
+require_once INSTALLDIR.'/lib/twitterapi.php';
+
+class ApiAuthAction extends TwitterapiAction
+{
+    /**
+     * Does this API resource require authentication?
+     *
+     * @return boolean true
+     */
+
+    function requiresAuth()
+    {
+        return true;
+    }
+
+    function checkBasicAuthUser()
+    {
+        $this->basicAuthProcessHeader();
+
+        if (!isset($this->auth_user)) {
+            header('WWW-Authenticate: Basic realm="StatusNet API"');
+
+            // show error if the user clicks 'cancel'
+
+            $this->showBasicAuthError();
+            return false;
+
+        } else {
+            $nickname = $this->auth_user;
+            $password = $this->auth_pw;
+            $this->auth_user = common_check_user($nickname, $password);
+
+            if (empty($this->auth_user)) {
+
+                // basic authentication failed
+
+                list($proxy, $ip) = common_client_ip();
+                common_log(LOG_WARNING,
+                    "Failed API auth attempt, nickname = $nickname, proxy = $proxy, ip = $ip.");
+                $this->showBasicAuthError();
+                return false;
+            }
+        }
+        return true;
+    }
+
+    function basicAuthProcessHeader()
+    {
+        if (isset($_SERVER['AUTHORIZATION']) || isset($_SERVER['HTTP_AUTHORIZATION'])) {
+            $authorization_header = isset($_SERVER['HTTP_AUTHORIZATION'])? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['AUTHORIZATION'];
+        }
+
+        if (isset($_SERVER['PHP_AUTH_USER'])) {
+            $this->auth_user = $_SERVER['PHP_AUTH_USER'];
+            $this->auth_pw = $_SERVER['PHP_AUTH_PW'];
+        } elseif (isset($authorization_header) && strstr(substr($authorization_header, 0, 5), 'Basic')) {
+            // decode the HTTP_AUTHORIZATION header on php-cgi server self
+            // on fcgid server the header name is AUTHORIZATION
+
+            $auth_hash = base64_decode(substr($authorization_header, 6));
+            list($this->auth_user, $this->auth_pw) = explode(':', $auth_hash);
+
+            // set all to null on a empty basic auth request
+            if ($this->auth_user == "") {
+                $this->auth_user = null;
+                $this->auth_pw = null;
+            }
+        } else {
+            $this->auth_user = null;
+            $this->auth_pw = null;
+        }
+    }
+
+    function showBasicAuthError()
+    {
+        header('HTTP/1.1 401 Unauthorized');
+        $msg = 'Could not authenticate you.';
+
+        if ($this->arg('format') == 'xml') {
+            header('Content-Type: application/xml; charset=utf-8');
+            $this->startXML();
+            $this->elementStart('hash');
+            $this->element('error', null, $msg);
+            $this->element('request', null, $_SERVER['REQUEST_URI']);
+            $this->elementEnd('hash');
+            $this->endXML();
+        } elseif ($this->arg('format') == 'json') {
+            header('Content-Type: application/json; charset=utf-8');
+            $error_array = array('error' => $msg, 'request' => $_SERVER['REQUEST_URI']);
+            print(json_encode($error_array));
+        } else {
+            header('Content-type: text/plain');
+            print "$msg\n";
+        }
+    }
+
+
+}
\ No newline at end of file
-- 
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