From bcedf05d19ba1b2f63bdbfe42ff2c726fc50b6b6 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 20 Aug 2013 13:23:59 -0400
Subject: [PATCH] s/$rcmail_config/$config/ also for plugins configuration

---
 plugins/http_authentication/http_authentication.php |  104 ++++++++++++++++++++++++++++++++++++++--------------
 1 files changed, 76 insertions(+), 28 deletions(-)

diff --git a/plugins/http_authentication/http_authentication.php b/plugins/http_authentication/http_authentication.php
index a8003cf..d86e179 100644
--- a/plugins/http_authentication/http_authentication.php
+++ b/plugins/http_authentication/http_authentication.php
@@ -5,40 +5,88 @@
  *
  * Make use of an existing HTTP authentication and perform login with the existing user credentials
  *
- * @version 1.1
+ * Configuration:
+ * // redirect the client to this URL after logout. This page is then responsible to clear HTTP auth
+ * $config['logout_url'] = 'http://server.tld/logout.html';
+ *
+ * See logout.html (in this directory) for an example how HTTP auth can be cleared.
+ *
+ * For other configuration options, see config.inc.php.dist!
+ *
+ * @version @package_version@
+ * @license GNU GPLv3+
  * @author Thomas Bruederli
  */
 class http_authentication extends rcube_plugin
 {
-  public $task = 'login';
 
-  function init()
-  {
-    $this->add_hook('startup', array($this, 'startup'));
-    $this->add_hook('authenticate', array($this, 'authenticate'));
-  }
-
-  function startup($args)
-  {
-    // change action to login
-    if (empty($args['action']) && empty($_SESSION['user_id'])
-        && !empty($_SERVER['PHP_AUTH_USER']) && !empty($_SERVER['PHP_AUTH_PW']))
-      $args['action'] = 'login';
-
-    return $args;
-  }
-
-  function authenticate($args)
-  {
-    if (!empty($_SERVER['PHP_AUTH_USER']) && !empty($_SERVER['PHP_AUTH_PW'])) {
-      $args['user'] = $_SERVER['PHP_AUTH_USER'];
-      $args['pass'] = $_SERVER['PHP_AUTH_PW'];
+    function init()
+    {
+        $this->add_hook('startup', array($this, 'startup'));
+        $this->add_hook('authenticate', array($this, 'authenticate'));
+        $this->add_hook('logout_after', array($this, 'logout'));
     }
-    
-    $args['cookiecheck'] = false;
-  
-    return $args;
-  }
 
+    function startup($args)
+    {
+        if (!empty($_SERVER['PHP_AUTH_USER']) && !empty($_SERVER['PHP_AUTH_PW'])) {
+            $rcmail = rcmail::get_instance();
+            $rcmail->add_shutdown_function(array('http_authentication', 'shutdown'));
+
+            // handle login action
+            if (empty($args['action']) && empty($_SESSION['user_id'])) {
+                $args['action'] = 'login';
+            }
+            // Set user password in session (see shutdown() method for more info)
+            else if (!empty($_SESSION['user_id']) && empty($_SESSION['password'])) {
+                $_SESSION['password'] = $rcmail->encrypt($_SERVER['PHP_AUTH_PW']);
+            }
+        }
+
+        return $args;
+    }
+
+    function authenticate($args)
+    {
+        // Load plugin's config file
+        $this->load_config();
+
+        $host = rcmail::get_instance()->config->get('http_authentication_host');
+        if (is_string($host) && trim($host) !== '' && empty($args['host']))
+            $args['host'] = rcube_utils::idn_to_ascii(rcube_utils::parse_host($host));
+
+        // Allow entering other user data in login form,
+        // e.g. after log out (#1487953)
+        if (!empty($args['user'])) {
+            return $args;
+        }
+
+        if (!empty($_SERVER['PHP_AUTH_USER']) && !empty($_SERVER['PHP_AUTH_PW'])) {
+            $args['user'] = $_SERVER['PHP_AUTH_USER'];
+            $args['pass'] = $_SERVER['PHP_AUTH_PW'];
+        }
+
+        $args['cookiecheck'] = false;
+        $args['valid'] = true;
+
+        return $args;
+    }
+
+    function logout($args)
+    {
+        // redirect to configured URL in order to clear HTTP auth credentials
+        if (!empty($_SERVER['PHP_AUTH_USER']) && $args['user'] == $_SERVER['PHP_AUTH_USER']) {
+            if ($url = rcmail::get_instance()->config->get('logout_url')) {
+                header("Location: $url", true, 307);
+            }
+        }
+    }
+
+    function shutdown()
+    {
+        // There's no need to store password (even if encrypted) in session
+        // We'll set it back on startup (#1486553)
+        rcmail::get_instance()->session->remove('password');
+    }
 }
 

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