2 files changed, 95 insertions, 0 deletions
diff --git a/plugins/http_authentication/http_authentication.php b/plugins/http_authentication/http_authentication.php
new file mode 100644
index 000000000..be49b52be
--- /dev/null
+++ b/plugins/http_authentication/http_authentication.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * HTTP Basic Authentication
+ *
+ * Make use of an existing HTTP authentication and perform login with the existing user credentials
+ *
+ * Configuration:
+ * // redirect the client to this URL after logout. This page is then responsible to clear HTTP auth
+ * $rcmail_config['logout_url'] = 'http://server.tld/logout.html';
+ *
+ * See logout.html (in this directory) for an example how HTTP auth can be cleared.
+ *
+ * @version 1.4
+ * @author Thomas Bruederli
+ */
+class http_authentication extends rcube_plugin
+{
+  public $task = 'login|logout';
+
+  function init()
+  {
+    $this->add_hook('startup', array($this, 'startup'));
+    $this->add_hook('authenticate', array($this, 'authenticate'));
+    $this->add_hook('logout_after', array($this, 'logout'));
+  }
+
+  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)
+  {
+    // 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'] == $_SERVER['PHP_AUTH_USER'] && ($url = rcmail::get_instance()->config->get('logout_url'))) {
+      header("Location: $url", true, 307);
+    }
+  }
+
+}
+
diff --git a/plugins/http_authentication/logout.html b/plugins/http_authentication/logout.html
new file mode 100644
index 000000000..0a78a62f2
--- /dev/null
+++ b/plugins/http_authentication/logout.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Logout</title>
+<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.min.js"></script>
+<script type="text/javascript">
+
+// as seen on http://stackoverflow.com/questions/31326/is-there-a-browser-equivalent-to-ies-clearauthenticationcache
+$(document).ready(function(){
+	if (document.all && document.execCommand) {
+		document.execCommand("ClearAuthenticationCache", "false");
+	 }
+	 else {
+		 $.ajax({
+			url: location.href,
+			type: 'POST',
+			username: '__LOGOUT__',
+			password: '***********'
+		});
+	}
+});
+
+</script>
+</head>
+<body>
+<h1>You've successully been logged out!</h1>
+
+</body>
+\ No newline at end of file