17 files changed, 5124 insertions, 0 deletions
diff --git a/plugins/CasAuthentication/CasAuthenticationPlugin.php b/plugins/CasAuthentication/CasAuthenticationPlugin.php
new file mode 100644
index 000000000..428aafb02
--- /dev/null
+++ b/plugins/CasAuthentication/CasAuthenticationPlugin.php
@@ -0,0 +1,134 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Plugin to enable Single Sign On via CAS (Central Authentication Service)
+ *
+ * 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  Plugin
+ * @package   StatusNet
+ * @author    Craig Andrews <candrews@integralblue.com>
+ * @copyright 2009 Craig Andrews http://candrews.integralblue.com
+ * @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') && !defined('LACONICA')) {
+    exit(1);
+}
+
+// We bundle the phpCAS library...
+set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/CAS');
+
+class CasAuthenticationPlugin extends AuthenticationPlugin
+{
+    public $server;
+    public $port = 443;
+    public $path = '';
+
+    function checkPassword($username, $password)
+    {
+        global $casTempPassword;
+        return ($casTempPassword == $password);
+    }
+
+    function onAutoload($cls)
+    {
+        switch ($cls)
+        {
+         case 'phpCAS':
+            require_once(INSTALLDIR.'/plugins/CasAuthentication/extlib/CAS.php');
+            return false;
+         case 'CasloginAction':
+            require_once(INSTALLDIR.'/plugins/CasAuthentication/' . strtolower(mb_substr($cls, 0, -6)) . '.php');
+            return false;
+         default:
+            return parent::onAutoload($cls);
+        }
+    }
+
+    function onStartInitializeRouter($m)
+    {
+        $m->connect('main/cas', array('action' => 'caslogin'));
+        return true;
+    }
+
+    function onEndLoginGroupNav(&$action)
+    {
+        $action_name = $action->trimmed('action');
+
+        $action->menuItem(common_local_url('caslogin'),
+                          _m('CAS'),
+                          _m('Login or register with CAS'),
+                          $action_name === 'caslogin');
+
+        return true;
+    }
+
+    function onEndShowPageNotice($action)
+    {
+        $name = $action->trimmed('action');
+
+        switch ($name)
+        {
+         case 'login':
+            $instr = '(Have an account with CAS? ' .
+              'Try our [CAS login]'.
+              '(%%action.caslogin%%)!)';
+            break;
+         default:
+            return true;
+        }
+
+        $output = common_markup_to_html($instr);
+        $action->raw($output);
+        return true;
+    }
+
+    function onLoginAction($action, &$login)
+    {
+        switch ($action)
+        {
+         case 'caslogin':
+            $login = true;
+            return false;
+         default:
+            return true;
+        }
+    }
+
+    function onInitializePlugin(){
+        parent::onInitializePlugin();
+        if(!isset($this->server)){
+            throw new Exception("must specify a server");
+        }
+        if(!isset($this->port)){
+            throw new Exception("must specify a port");
+        }
+        if(!isset($this->path)){
+            throw new Exception("must specify a path");
+        }
+        //These values need to be accessible to a action object
+        //I can't think of any other way than global variables
+        //to allow the action instance to be able to see values :-(
+        global $casSettings;
+        $casSettings = array();
+        $casSettings['server']=$this->server;
+        $casSettings['port']=$this->port;
+        $casSettings['path']=$this->path;
+    }
+}
diff --git a/plugins/CasAuthentication/README b/plugins/CasAuthentication/README
new file mode 100644
index 000000000..2ee54dc05
--- /dev/null
+++ b/plugins/CasAuthentication/README
@@ -0,0 +1,38 @@
+The CAS Authentication plugin allows for StatusNet to handle authentication
+through CAS (Central Authentication Service).
+
+Installation
+============
+add "addPlugin('casAuthentication',
+    array('setting'=>'value', 'setting2'=>'value2', ...);"
+to the bottom of your config.php
+
+Settings
+========
+provider_name*: a unique name for this authentication provider.
+authoritative (false): Set to true if CAS's responses are authoritative
+    (if authorative and CAS fails, no other password checking will be done).
+autoregistration (false): Set to true if users should be automatically created
+    when they attempt to login.
+email_changeable (true): Are users allowed to change their email address?
+    (true or false)
+password_changeable*: must be set to false. This plugin does not support changing passwords.
+
+server*: CAS server to authentication against
+port (443): Port the CAS server listens on. Almost always 443
+path (): Path on the server to CAS. Usually blank.
+
+* required
+default values are in (parenthesis)
+
+Example
+=======
+addPlugin('casAuthentication', array(
+    'provider_name'=>'Example',
+    'authoritative'=>true,
+    'autoregistration'=>true,
+    'server'=>'sso-cas.univ-rennes1.fr',
+    'port'=>443,
+    'path'=>''
+));
+
diff --git a/plugins/CasAuthentication/caslogin.php b/plugins/CasAuthentication/caslogin.php
new file mode 100644
index 000000000..390a75d8b
--- /dev/null
+++ b/plugins/CasAuthentication/caslogin.php
@@ -0,0 +1,66 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2008, 2009, StatusNet, Inc.
+ *
+ * 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/>.
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
+
+class CasloginAction extends Action
+{
+    function handle($args)
+    {
+        parent::handle($args);
+        if (common_is_real_login()) {
+            $this->clientError(_m('Already logged in.'));
+        } else {
+            global $casSettings;
+            phpCAS::client(CAS_VERSION_2_0,$casSettings['server'],$casSettings['port'],$casSettings['path']);
+            phpCAS::setNoCasServerValidation();
+            phpCAS::handleLogoutRequests();
+            phpCAS::forceAuthentication();
+            global $casTempPassword;
+            $casTempPassword = common_good_rand(16);
+            $user = common_check_user(phpCAS::getUser(), $casTempPassword);
+            if (!$user) {
+                $this->serverError(_('Incorrect username or password.'));
+                return;
+            }
+
+            // success!
+            if (!common_set_user($user)) {
+                $this->serverError(_('Error setting user. You are probably not authorized.'));
+                return;
+            }
+
+            common_real_login(true);
+
+            $url = common_get_returnto();
+
+            if ($url) {
+                // We don't have to return to it again
+                common_set_returnto(null);
+            } else {
+                $url = common_local_url('all',
+                                    array('nickname' =>
+                                          $user->nickname));
+            }
+
+            common_redirect($url, 303);
+
+        }
+    }
+}
diff --git a/plugins/CasAuthentication/extlib/CAS.php b/plugins/CasAuthentication/extlib/CAS.php
new file mode 100644
index 000000000..59238eb81
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS.php
@@ -0,0 +1,1471 @@
+<?php
+
+// commented in 0.4.22-RC2 for Sylvain Derosiaux
+// error_reporting(E_ALL ^ E_NOTICE);
+
+//
+// hack by Vangelis Haniotakis to handle the absence of $_SERVER['REQUEST_URI'] in IIS
+//
+if (!$_SERVER['REQUEST_URI']) {
+	$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'].'?'.$_SERVER['QUERY_STRING'];
+}
+
+//
+// another one by Vangelis Haniotakis also to make phpCAS work with PHP5
+//
+if (version_compare(PHP_VERSION,'5','>=')) {
+	require_once(dirname(__FILE__).'/CAS/domxml-php4-php5.php');
+}
+
+/**
+ * @file CAS/CAS.php
+ * Interface class of the phpCAS library
+ *
+ * @ingroup public
+ */
+
+// ########################################################################
+//  CONSTANTS
+// ########################################################################
+
+// ------------------------------------------------------------------------
+//  CAS VERSIONS
+// ------------------------------------------------------------------------
+
+/**
+ * phpCAS version. accessible for the user by phpCAS::getVersion().
+ */
+define('PHPCAS_VERSION','1.0.1');
+
+// ------------------------------------------------------------------------
+//  CAS VERSIONS
+// ------------------------------------------------------------------------
+ /**
+  * @addtogroup public
+  * @{
+  */
+
+/**
+ * CAS version 1.0
+ */
+define("CAS_VERSION_1_0",'1.0');
+/*!
+ * CAS version 2.0
+ */
+define("CAS_VERSION_2_0",'2.0');
+
+/** @} */
+ /**
+  * @addtogroup publicPGTStorage
+  * @{
+  */
+// ------------------------------------------------------------------------
+//  FILE PGT STORAGE
+// ------------------------------------------------------------------------
+ /**
+  * Default path used when storing PGT's to file
+  */
+define("CAS_PGT_STORAGE_FILE_DEFAULT_PATH",'/tmp');
+/**
+ * phpCAS::setPGTStorageFile()'s 2nd parameter to write plain text files
+ */
+define("CAS_PGT_STORAGE_FILE_FORMAT_PLAIN",'plain');
+/**
+ * phpCAS::setPGTStorageFile()'s 2nd parameter to write xml files
+ */
+define("CAS_PGT_STORAGE_FILE_FORMAT_XML",'xml');
+/**
+ * Default format used when storing PGT's to file
+ */
+define("CAS_PGT_STORAGE_FILE_DEFAULT_FORMAT",CAS_PGT_STORAGE_FILE_FORMAT_PLAIN);
+// ------------------------------------------------------------------------
+//  DATABASE PGT STORAGE
+// ------------------------------------------------------------------------
+ /**
+  * default database type when storing PGT's to database
+  */
+define("CAS_PGT_STORAGE_DB_DEFAULT_DATABASE_TYPE",'mysql');
+/**
+ * default host when storing PGT's to database
+ */
+define("CAS_PGT_STORAGE_DB_DEFAULT_HOSTNAME",'localhost');
+/**
+ * default port when storing PGT's to database
+ */
+define("CAS_PGT_STORAGE_DB_DEFAULT_PORT",'');
+/**
+ * default database when storing PGT's to database
+ */
+define("CAS_PGT_STORAGE_DB_DEFAULT_DATABASE",'phpCAS');
+/**
+ * default table when storing PGT's to database
+ */
+define("CAS_PGT_STORAGE_DB_DEFAULT_TABLE",'pgt');
+
+/** @} */
+// ------------------------------------------------------------------------
+// SERVICE ACCESS ERRORS
+// ------------------------------------------------------------------------
+ /**
+  * @addtogroup publicServices
+  * @{
+  */
+
+/**
+ * phpCAS::service() error code on success
+ */
+define("PHPCAS_SERVICE_OK",0);
+/**
+ * phpCAS::service() error code when the PT could not retrieve because
+ * the CAS server did not respond.
+ */
+define("PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE",1);
+/**
+ * phpCAS::service() error code when the PT could not retrieve because
+ * the response of the CAS server was ill-formed.
+ */
+define("PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE",2);
+/**
+ * phpCAS::service() error code when the PT could not retrieve because
+ * the CAS server did not want to.
+ */
+define("PHPCAS_SERVICE_PT_FAILURE",3);
+/**
+ * phpCAS::service() error code when the service was not available.
+ */
+define("PHPCAS_SERVICE_NOT AVAILABLE",4);
+
+/** @} */
+// ------------------------------------------------------------------------
+//  LANGUAGES
+// ------------------------------------------------------------------------
+ /**
+  * @addtogroup publicLang
+  * @{
+  */
+
+define("PHPCAS_LANG_ENGLISH",    'english');
+define("PHPCAS_LANG_FRENCH",     'french');
+define("PHPCAS_LANG_GREEK",      'greek');
+define("PHPCAS_LANG_GERMAN",     'german');
+define("PHPCAS_LANG_JAPANESE",   'japanese');
+define("PHPCAS_LANG_SPANISH",    'spanish');
+define("PHPCAS_LANG_CATALAN",    'catalan');
+
+/** @} */
+
+/**
+ * @addtogroup internalLang
+ * @{
+ */
+
+/**
+ * phpCAS default language (when phpCAS::setLang() is not used)
+ */
+define("PHPCAS_LANG_DEFAULT", PHPCAS_LANG_ENGLISH);
+
+/** @} */
+// ------------------------------------------------------------------------
+//  DEBUG
+// ------------------------------------------------------------------------
+ /**
+  * @addtogroup publicDebug
+  * @{
+  */
+
+/**
+ * The default directory for the debug file under Unix.
+ */
+define('DEFAULT_DEBUG_DIR','/tmp/');
+
+/** @} */
+// ------------------------------------------------------------------------
+//  MISC
+// ------------------------------------------------------------------------
+ /**
+  * @addtogroup internalMisc
+  * @{
+  */
+
+/**
+ * This global variable is used by the interface class phpCAS.
+ *
+ * @hideinitializer
+ */
+$GLOBALS['PHPCAS_CLIENT']  = null;
+
+/**
+ * This global variable is used to store where the initializer is called from 
+ * (to print a comprehensive error in case of multiple calls).
+ *
+ * @hideinitializer
+ */
+$GLOBALS['PHPCAS_INIT_CALL'] = array('done' => FALSE,
+	'file' => '?',
+	'line' => -1,
+	'method' => '?');
+
+/**
+ * This global variable is used to store where the method checking
+ * the authentication is called from (to print comprehensive errors)
+ *
+ * @hideinitializer
+ */
+$GLOBALS['PHPCAS_AUTH_CHECK_CALL'] = array('done' => FALSE,
+	'file' => '?',
+	'line' => -1,
+	'method' => '?',
+	'result' => FALSE);
+
+/**
+ * This global variable is used to store phpCAS debug mode.
+ *
+ * @hideinitializer
+ */
+$GLOBALS['PHPCAS_DEBUG']  = array('filename' => FALSE,
+	'indent' => 0,
+	'unique_id' => '');
+
+/** @} */
+
+// ########################################################################
+//  CLIENT CLASS
+// ########################################################################
+
+// include client class
+include_once(dirname(__FILE__).'/CAS/client.php');
+
+// ########################################################################
+//  INTERFACE CLASS
+// ########################################################################
+
+/**
+ * @class phpCAS
+ * The phpCAS class is a simple container for the phpCAS library. It provides CAS
+ * authentication for web applications written in PHP.
+ *
+ * @ingroup public
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ *
+ * \internal All its methods access the same object ($PHPCAS_CLIENT, declared 
+ * at the end of CAS/client.php).
+ */
+
+
+
+class phpCAS
+{
+	
+	// ########################################################################
+	//  INITIALIZATION
+	// ########################################################################
+	
+	/**
+	 * @addtogroup publicInit
+	 * @{
+	 */
+	
+	/**
+	 * phpCAS client initializer.
+	 * @note Only one of the phpCAS::client() and phpCAS::proxy functions should be
+	 * called, only once, and before all other methods (except phpCAS::getVersion()
+	 * and phpCAS::setDebug()).
+	 *
+	 * @param $server_version the version of the CAS server
+	 * @param $server_hostname the hostname of the CAS server
+	 * @param $server_port the port the CAS server is running on
+	 * @param $server_uri the URI the CAS server is responding on
+	 * @param $start_session Have phpCAS start PHP sessions (default true)
+	 *
+	 * @return a newly created CASClient object
+	 */
+	function client($server_version,
+					$server_hostname,
+					$server_port,
+					$server_uri,
+					$start_session = true)
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_INIT_CALL;
+		
+		phpCAS::traceBegin();
+		if ( is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error($PHPCAS_INIT_CALL['method'].'() has already been called (at '.$PHPCAS_INIT_CALL['file'].':'.$PHPCAS_INIT_CALL['line'].')');
+		}
+		if ( gettype($server_version) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_version (should be `string\')');
+		}
+		if ( gettype($server_hostname) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_hostname (should be `string\')');
+		}
+		if ( gettype($server_port) != 'integer' ) {
+			phpCAS::error('type mismatched for parameter $server_port (should be `integer\')');
+		}
+		if ( gettype($server_uri) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_uri (should be `string\')');
+		}
+		
+		// store where the initialzer is called from
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_INIT_CALL = array('done' => TRUE,
+			'file' => $dbg[0]['file'],
+			'line' => $dbg[0]['line'],
+			'method' => __CLASS__.'::'.__FUNCTION__);
+		
+		// initialize the global object $PHPCAS_CLIENT
+		$PHPCAS_CLIENT = new CASClient($server_version,FALSE/*proxy*/,$server_hostname,$server_port,$server_uri,$start_session);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * phpCAS proxy initializer.
+	 * @note Only one of the phpCAS::client() and phpCAS::proxy functions should be
+	 * called, only once, and before all other methods (except phpCAS::getVersion()
+	 * and phpCAS::setDebug()).
+	 *
+	 * @param $server_version the version of the CAS server
+	 * @param $server_hostname the hostname of the CAS server
+	 * @param $server_port the port the CAS server is running on
+	 * @param $server_uri the URI the CAS server is responding on
+	 * @param $start_session Have phpCAS start PHP sessions (default true)
+	 *
+	 * @return a newly created CASClient object
+	 */
+	function proxy($server_version,
+				   $server_hostname,
+				   $server_port,
+				   $server_uri,
+				   $start_session = true)
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_INIT_CALL;
+		
+		phpCAS::traceBegin();
+		if ( is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error($PHPCAS_INIT_CALL['method'].'() has already been called (at '.$PHPCAS_INIT_CALL['file'].':'.$PHPCAS_INIT_CALL['line'].')');
+		}
+		if ( gettype($server_version) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_version (should be `string\')');
+		}
+		if ( gettype($server_hostname) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_hostname (should be `string\')');
+		}
+		if ( gettype($server_port) != 'integer' ) {
+			phpCAS::error('type mismatched for parameter $server_port (should be `integer\')');
+		}
+		if ( gettype($server_uri) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $server_uri (should be `string\')');
+		}
+		
+		// store where the initialzer is called from
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_INIT_CALL = array('done' => TRUE,
+			'file' => $dbg[0]['file'],
+			'line' => $dbg[0]['line'],
+			'method' => __CLASS__.'::'.__FUNCTION__);
+		
+		// initialize the global object $PHPCAS_CLIENT
+		$PHPCAS_CLIENT = new CASClient($server_version,TRUE/*proxy*/,$server_hostname,$server_port,$server_uri,$start_session);
+		phpCAS::traceEnd();
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  DEBUGGING
+	// ########################################################################
+	
+	/**
+	 * @addtogroup publicDebug
+	 * @{
+	 */
+	
+	/**
+	 * Set/unset debug mode
+	 *
+	 * @param $filename the name of the file used for logging, or FALSE to stop debugging.
+	 */
+	function setDebug($filename='')
+		{
+		global $PHPCAS_DEBUG;
+		
+		if ( $filename != FALSE && gettype($filename) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $dbg (should be FALSE or the name of the log file)');
+		}
+		
+		if ( empty($filename) ) {
+			if ( preg_match('/^Win.*/',getenv('OS')) ) {
+				if ( isset($_ENV['TMP']) ) {
+					$debugDir = $_ENV['TMP'].'/';
+				} else if ( isset($_ENV['TEMP']) ) {
+					$debugDir = $_ENV['TEMP'].'/';
+				} else {
+					$debugDir = '';
+				}
+			} else {
+				$debugDir = DEFAULT_DEBUG_DIR;
+			}
+			$filename = $debugDir . 'phpCAS.log';
+		}
+		
+		if ( empty($PHPCAS_DEBUG['unique_id']) ) {
+			$PHPCAS_DEBUG['unique_id'] = substr(strtoupper(md5(uniqid(''))),0,4);
+		}
+		
+		$PHPCAS_DEBUG['filename'] = $filename;
+		
+		phpCAS::trace('START ******************');
+		}
+	
+	/** @} */
+	/**
+	 * @addtogroup internalDebug
+	 * @{
+	 */
+	
+	/**
+	 * This method is a wrapper for debug_backtrace() that is not available 
+	 * in all PHP versions (>= 4.3.0 only)
+	 */
+	function backtrace()
+		{
+		if ( function_exists('debug_backtrace') ) {
+			return debug_backtrace();
+		} else {
+			// poor man's hack ... but it does work ...
+			return array();
+		}
+		}
+	
+	/**
+	 * Logs a string in debug mode.
+	 *
+	 * @param $str the string to write
+	 *
+	 * @private
+	 */
+	function log($str)
+		{
+		$indent_str = ".";
+		global $PHPCAS_DEBUG;
+		
+		if ( $PHPCAS_DEBUG['filename'] ) {
+			for ($i=0;$i<$PHPCAS_DEBUG['indent'];$i++) {
+				$indent_str .= '|    ';
+			}
+			error_log($PHPCAS_DEBUG['unique_id'].' '.$indent_str.$str."\n",3,$PHPCAS_DEBUG['filename']);
+		}
+		
+		}
+	
+	/**
+	 * This method is used by interface methods to print an error and where the function
+	 * was originally called from.
+	 *
+	 * @param $msg the message to print
+	 *
+	 * @private
+	 */
+	function error($msg)
+		{
+		$dbg = phpCAS::backtrace();
+		$function = '?';
+		$file = '?';
+		$line = '?';
+		if ( is_array($dbg) ) {
+			for ( $i=1; $i<sizeof($dbg); $i++) {
+				if ( is_array($dbg[$i]) ) {
+					if ( $dbg[$i]['class'] == __CLASS__ ) {
+						$function = $dbg[$i]['function'];
+						$file = $dbg[$i]['file'];
+						$line = $dbg[$i]['line'];
+					}
+				}
+			}
+		}
+		echo "<br />\n<b>phpCAS error</b>: <font color=\"FF0000\"><b>".__CLASS__."::".$function.'(): '.htmlentities($msg)."</b></font> in <b>".$file."</b> on line <b>".$line."</b><br />\n";
+		phpCAS::trace($msg);
+		phpCAS::traceExit();
+		exit();
+		}
+	
+	/**
+	 * This method is used to log something in debug mode.
+	 */
+	function trace($str)
+		{
+		$dbg = phpCAS::backtrace();
+		phpCAS::log($str.' ['.basename($dbg[1]['file']).':'.$dbg[1]['line'].']');
+		}
+	
+	/**
+	 * This method is used to indicate the start of the execution of a function in debug mode.
+	 */
+	function traceBegin()
+		{
+		global $PHPCAS_DEBUG;
+		
+		$dbg = phpCAS::backtrace();
+		$str = '=> ';
+		if ( !empty($dbg[2]['class']) ) {
+			$str .= $dbg[2]['class'].'::';
+		}
+		$str .= $dbg[2]['function'].'(';      
+		if ( is_array($dbg[2]['args']) ) {
+			foreach ($dbg[2]['args'] as $index => $arg) {
+				if ( $index != 0 ) {
+					$str .= ', ';
+				}
+				$str .= str_replace("\n","",var_export($arg,TRUE));
+			}
+		}
+		$str .= ') ['.basename($dbg[2]['file']).':'.$dbg[2]['line'].']';
+		phpCAS::log($str);
+		$PHPCAS_DEBUG['indent'] ++;
+		}
+	
+	/**
+	 * This method is used to indicate the end of the execution of a function in debug mode.
+	 *
+	 * @param $res the result of the function
+	 */
+	function traceEnd($res='')
+		{
+		global $PHPCAS_DEBUG;
+		
+		$PHPCAS_DEBUG['indent'] --;
+		$dbg = phpCAS::backtrace();
+		$str = '';
+		$str .= '<= '.str_replace("\n","",var_export($res,TRUE));
+		phpCAS::log($str);
+		}
+	
+	/**
+	 * This method is used to indicate the end of the execution of the program
+	 */
+	function traceExit()
+		{
+		global $PHPCAS_DEBUG;
+		
+		phpCAS::log('exit()');
+		while ( $PHPCAS_DEBUG['indent'] > 0 ) {
+			phpCAS::log('-');
+			$PHPCAS_DEBUG['indent'] --;
+		}
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  INTERNATIONALIZATION
+	// ########################################################################
+	/**
+	 * @addtogroup publicLang
+	 * @{
+	 */
+	
+	/**
+	 * This method is used to set the language used by phpCAS. 
+	 * @note Can be called only once.
+	 *
+	 * @param $lang a string representing the language.
+	 *
+	 * @sa PHPCAS_LANG_FRENCH, PHPCAS_LANG_ENGLISH
+	 */
+	function setLang($lang)
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		if ( gettype($lang) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $lang (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setLang($lang);
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  VERSION
+	// ########################################################################
+	/**
+	 * @addtogroup public
+	 * @{
+	 */
+	
+	/**
+	 * This method returns the phpCAS version.
+	 *
+	 * @return the phpCAS version.
+	 */
+	function getVersion()
+		{
+		return PHPCAS_VERSION;
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  HTML OUTPUT
+	// ########################################################################
+	/**
+	 * @addtogroup publicOutput
+	 * @{
+	 */
+	
+	/**
+	 * This method sets the HTML header used for all outputs.
+	 *
+	 * @param $header the HTML header.
+	 */
+	function setHTMLHeader($header)
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		if ( gettype($header) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $header (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setHTMLHeader($header);
+		}
+	
+	/**
+	 * This method sets the HTML footer used for all outputs.
+	 *
+	 * @param $footer the HTML footer.
+	 */
+	function setHTMLFooter($footer)
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		if ( gettype($footer) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $footer (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setHTMLFooter($footer);
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  PGT STORAGE
+	// ########################################################################
+	/**
+	 * @addtogroup publicPGTStorage
+	 * @{
+	 */
+	
+	/**
+	 * This method is used to tell phpCAS to store the response of the
+	 * CAS server to PGT requests onto the filesystem. 
+	 *
+	 * @param $format the format used to store the PGT's (`plain' and `xml' allowed)
+	 * @param $path the path where the PGT's should be stored
+	 */
+	function setPGTStorageFile($format='',
+		$path='')
+		{
+		global $PHPCAS_CLIENT,$PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_CLIENT->isProxy() ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( $PHPCAS_AUTH_CHECK_CALL['done'] ) {
+			phpCAS::error('this method should only be called before '.$PHPCAS_AUTH_CHECK_CALL['method'].'() (called at '.$PHPCAS_AUTH_CHECK_CALL['file'].':'.$PHPCAS_AUTH_CHECK_CALL['line'].')');
+		}
+		if ( gettype($format) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $format (should be `string\')');
+		}
+		if ( gettype($path) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $format (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setPGTStorageFile($format,$path);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * This method is used to tell phpCAS to store the response of the
+	 * CAS server to PGT requests into a database. 
+	 * @note The connection to the database is done only when needed. 
+	 * As a consequence, bad parameters are detected only when 
+	 * initializing PGT storage, except in debug mode.
+	 *
+	 * @param $user the user to access the data with
+	 * @param $password the user's password
+	 * @param $database_type the type of the database hosting the data
+	 * @param $hostname the server hosting the database
+	 * @param $port the port the server is listening on
+	 * @param $database the name of the database
+	 * @param $table the name of the table storing the data
+	 */
+	function setPGTStorageDB($user,
+							 $password,
+							 $database_type='',
+								 $hostname='',
+									 $port=0,
+										 $database='',
+											 $table='')
+		{
+		global $PHPCAS_CLIENT,$PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_CLIENT->isProxy() ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( $PHPCAS_AUTH_CHECK_CALL['done'] ) {
+			phpCAS::error('this method should only be called before '.$PHPCAS_AUTH_CHECK_CALL['method'].'() (called at '.$PHPCAS_AUTH_CHECK_CALL['file'].':'.$PHPCAS_AUTH_CHECK_CALL['line'].')');
+		}
+		if ( gettype($user) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $user (should be `string\')');
+		}
+		if ( gettype($password) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $password (should be `string\')');
+		}
+		if ( gettype($database_type) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $database_type (should be `string\')');
+		}
+		if ( gettype($hostname) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $hostname (should be `string\')');
+		}
+		if ( gettype($port) != 'integer' ) {
+			phpCAS::error('type mismatched for parameter $port (should be `integer\')');
+		}
+		if ( gettype($database) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $database (should be `string\')');
+		}
+		if ( gettype($table) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $table (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setPGTStorageDB($this,$user,$password,$hostname,$port,$database,$table);
+		phpCAS::traceEnd();
+		}
+	
+	/** @} */
+	// ########################################################################
+	// ACCESS TO EXTERNAL SERVICES
+	// ########################################################################
+	/**
+	 * @addtogroup publicServices
+	 * @{
+	 */
+	
+	/**
+	 * This method is used to access an HTTP[S] service.
+	 * 
+	 * @param $url the service to access.
+	 * @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
+	 * success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
+	 * PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
+	 * @param $output the output of the service (also used to give an error
+	 * message on failure).
+	 *
+	 * @return TRUE on success, FALSE otherwise (in this later case, $err_code
+	 * gives the reason why it failed and $output contains an error message).
+	 */
+	function serviceWeb($url,&$err_code,&$output)
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_CLIENT->isProxy() ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['done'] ) {
+			phpCAS::error('this method should only be called after the programmer is sure the user has been authenticated (by calling '.__CLASS__.'::checkAuthentication() or '.__CLASS__.'::forceAuthentication()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['result'] ) {
+			phpCAS::error('authentication was checked (by '.$PHPCAS_AUTH_CHECK_CALL['method'].'() at '.$PHPCAS_AUTH_CHECK_CALL['file'].':'.$PHPCAS_AUTH_CHECK_CALL['line'].') but the method returned FALSE');
+		}
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		
+		$res = $PHPCAS_CLIENT->serviceWeb($url,$err_code,$output);
+		
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/**
+	 * This method is used to access an IMAP/POP3/NNTP service.
+	 * 
+	 * @param $url a string giving the URL of the service, including the mailing box
+	 * for IMAP URLs, as accepted by imap_open().
+	 * @param $flags options given to imap_open().
+	 * @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
+	 * success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
+	 * PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
+	 * @param $err_msg an error message on failure
+	 * @param $pt the Proxy Ticket (PT) retrieved from the CAS server to access the URL
+	 * on success, FALSE on error).
+	 *
+	 * @return an IMAP stream on success, FALSE otherwise (in this later case, $err_code
+	 * gives the reason why it failed and $err_msg contains an error message).
+	 */
+	function serviceMail($url,$flags,&$err_code,&$err_msg,&$pt)
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_CLIENT->isProxy() ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['done'] ) {
+			phpCAS::error('this method should only be called after the programmer is sure the user has been authenticated (by calling '.__CLASS__.'::checkAuthentication() or '.__CLASS__.'::forceAuthentication()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['result'] ) {
+			phpCAS::error('authentication was checked (by '.$PHPCAS_AUTH_CHECK_CALL['method'].'() at '.$PHPCAS_AUTH_CHECK_CALL['file'].':'.$PHPCAS_AUTH_CHECK_CALL['line'].') but the method returned FALSE');
+		}
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		
+		if ( gettype($flags) != 'integer' ) {
+			phpCAS::error('type mismatched for parameter $flags (should be `integer\')');
+		}
+		
+		$res = $PHPCAS_CLIENT->serviceMail($url,$flags,$err_code,$err_msg,$pt);
+		
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  AUTHENTICATION
+	// ########################################################################
+	/**
+	 * @addtogroup publicAuth
+	 * @{
+	 */
+	
+	/**
+	 * Set the times authentication will be cached before really accessing the CAS server in gateway mode: 
+	 * - -1: check only once, and then never again (until you pree login)
+	 * - 0: always check
+	 * - n: check every "n" time
+	 *
+	 * @param $n an integer.
+	 */
+	function setCacheTimesForAuthRecheck($n)
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		if ( gettype($n) != 'integer' ) {
+			phpCAS::error('type mismatched for parameter $header (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setCacheTimesForAuthRecheck($n);
+		}
+	
+	/**
+	 * This method is called to check if the user is authenticated (use the gateway feature).
+	 * @return TRUE when the user is authenticated; otherwise FALSE.
+	 */
+	function checkAuthentication()
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		
+		$auth = $PHPCAS_CLIENT->checkAuthentication();
+		
+		// store where the authentication has been checked and the result
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_AUTH_CHECK_CALL = array('done' => TRUE,
+			'file' => $dbg[0]['file'],
+			'line' => $dbg[0]['line'],
+			'method' => __CLASS__.'::'.__FUNCTION__,
+			'result' => $auth );
+		phpCAS::traceEnd($auth);
+		return $auth; 
+		}
+	
+	/**
+	 * This method is called to force authentication if the user was not already 
+	 * authenticated. If the user is not authenticated, halt by redirecting to 
+	 * the CAS server.
+	 */
+	function forceAuthentication()
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		
+		$auth = $PHPCAS_CLIENT->forceAuthentication();
+		
+		// store where the authentication has been checked and the result
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_AUTH_CHECK_CALL = array('done' => TRUE,
+			'file' => $dbg[0]['file'],
+			'line' => $dbg[0]['line'],
+			'method' => __CLASS__.'::'.__FUNCTION__,
+			'result' => $auth );
+		
+		if ( !$auth ) {
+			phpCAS::trace('user is not authenticated, redirecting to the CAS server');
+			$PHPCAS_CLIENT->forceAuthentication();
+		} else {
+			phpCAS::trace('no need to authenticate (user `'.phpCAS::getUser().'\' is already authenticated)');
+		}
+		
+		phpCAS::traceEnd();
+		return $auth; 
+		}
+	
+	/**
+	 * This method is called to renew the authentication.
+	 **/
+	function renewAuthentication() {
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before'.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		
+		// store where the authentication has been checked and the result
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_AUTH_CHECK_CALL = array('done' => TRUE, 'file' => $dbg[0]['file'], 'line' => $dbg[0]['line'], 'method' => __CLASS__.'::'.__FUNCTION__, 'result' => $auth );
+		
+		$PHPCAS_CLIENT->renewAuthentication();
+		phpCAS::traceEnd();
+	}
+
+	/**
+	 * This method has been left from version 0.4.1 for compatibility reasons.
+	 */
+	function authenticate()
+		{
+		phpCAS::error('this method is deprecated. You should use '.__CLASS__.'::forceAuthentication() instead');
+		}
+	
+	/**
+	 * This method is called to check if the user is authenticated (previously or by
+	 * tickets given in the URL).
+	 *
+	 * @return TRUE when the user is authenticated.
+	 */
+	function isAuthenticated()
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		
+		// call the isAuthenticated method of the global $PHPCAS_CLIENT object
+		$auth = $PHPCAS_CLIENT->isAuthenticated();
+		
+		// store where the authentication has been checked and the result
+		$dbg = phpCAS::backtrace();
+		$PHPCAS_AUTH_CHECK_CALL = array('done' => TRUE,
+			'file' => $dbg[0]['file'],
+			'line' => $dbg[0]['line'],
+			'method' => __CLASS__.'::'.__FUNCTION__,
+			'result' => $auth );
+		phpCAS::traceEnd($auth);
+		return $auth;
+		}
+	
+	/**
+	 * Checks whether authenticated based on $_SESSION. Useful to avoid
+	 * server calls.
+	 * @return true if authenticated, false otherwise.
+	 * @since 0.4.22 by Brendan Arnold
+	 */
+	function isSessionAuthenticated ()
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		return($PHPCAS_CLIENT->isSessionAuthenticated());
+		}
+	
+	/**
+	 * This method returns the CAS user's login name.
+	 * @warning should not be called only after phpCAS::forceAuthentication()
+	 * or phpCAS::checkAuthentication().
+	 *
+	 * @return the login name of the authenticated user
+	 */
+	function getUser()
+		{
+		global $PHPCAS_CLIENT, $PHPCAS_AUTH_CHECK_CALL;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['done'] ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()');
+		}
+		if ( !$PHPCAS_AUTH_CHECK_CALL['result'] ) {
+			phpCAS::error('authentication was checked (by '.$PHPCAS_AUTH_CHECK_CALL['method'].'() at '.$PHPCAS_AUTH_CHECK_CALL['file'].':'.$PHPCAS_AUTH_CHECK_CALL['line'].') but the method returned FALSE');
+		}
+		return $PHPCAS_CLIENT->getUser();
+		}
+	
+    /**
+     * Handle logout requests.
+     */
+    function handleLogoutRequests($check_client=true, $allowed_clients=false)
+        {
+            global $PHPCAS_CLIENT;
+            if ( !is_object($PHPCAS_CLIENT) ) {
+                phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+            }
+            return($PHPCAS_CLIENT->handleLogoutRequests($check_client, $allowed_clients));
+        }
+   
+	/**
+	 * This method returns the URL to be used to login.
+	 * or phpCAS::isAuthenticated().
+	 *
+	 * @return the login name of the authenticated user
+	 */
+	function getServerLoginURL()
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		return $PHPCAS_CLIENT->getServerLoginURL();
+		}
+	
+	/**
+	 * Set the login URL of the CAS server.
+	 * @param $url the login URL
+	 * @since 0.4.21 by Wyman Chan
+	 */
+	function setServerLoginURL($url='')
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after
+				'.__CLASS__.'::client()');
+		}
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be
+			`string\')');
+		}
+		$PHPCAS_CLIENT->setServerLoginURL($url);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * This method returns the URL to be used to login.
+	 * or phpCAS::isAuthenticated().
+	 *
+	 * @return the login name of the authenticated user
+	 */
+	function getServerLogoutURL()
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should not be called before '.__CLASS__.'::client() or '.__CLASS__.'::proxy()');
+		}
+		return $PHPCAS_CLIENT->getServerLogoutURL();
+		}
+	
+	/**
+	 * Set the logout URL of the CAS server.
+	 * @param $url the logout URL
+	 * @since 0.4.21 by Wyman Chan
+	 */
+	function setServerLogoutURL($url='')
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after
+				'.__CLASS__.'::client()');
+		}
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be
+			`string\')');
+		}
+		$PHPCAS_CLIENT->setServerLogoutURL($url);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * This method is used to logout from CAS.
+	 * @params $params an array that contains the optional url and service parameters that will be passed to the CAS server
+	 * @public
+	 */
+	function logout($params = "") {
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if (!is_object($PHPCAS_CLIENT)) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}
+		$parsedParams = array();
+		if ($params != "") {
+			if (is_string($params)) {
+				phpCAS::error('method `phpCAS::logout($url)\' is now deprecated, use `phpCAS::logoutWithUrl($url)\' instead');
+			}
+			if (!is_array($params)) {
+				phpCAS::error('type mismatched for parameter $params (should be `array\')');
+			}
+			foreach ($params as $key => $value) {
+				if ($key != "service" && $key != "url") {
+					phpCAS::error('only `url\' and `service\' parameters are allowed for method `phpCAS::logout($params)\'');
+				}
+				$parsedParams[$key] = $value;
+			}
+		}
+		$PHPCAS_CLIENT->logout($parsedParams);
+		// never reached
+		phpCAS::traceEnd();
+	}
+	
+	/**
+	 * This method is used to logout from CAS. Halts by redirecting to the CAS server.
+	 * @param $service a URL that will be transmitted to the CAS server
+	 */
+	function logoutWithRedirectService($service) {
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}
+		if (!is_string($service)) {
+			phpCAS::error('type mismatched for parameter $service (should be `string\')');
+		}
+		$PHPCAS_CLIENT->logout(array("service" => $service));
+		// never reached
+		phpCAS::traceEnd();
+	}
+	
+	/**
+	 * This method is used to logout from CAS. Halts by redirecting to the CAS server.
+	 * @param $url a URL that will be transmitted to the CAS server
+	 */
+	function logoutWithUrl($url) {
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}
+		if (!is_string($url)) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		$PHPCAS_CLIENT->logout(array("url" => $url));
+		// never reached
+		phpCAS::traceEnd();
+	}
+	
+	/**
+	 * This method is used to logout from CAS. Halts by redirecting to the CAS server.
+	 * @param $service a URL that will be transmitted to the CAS server
+	 * @param $url a URL that will be transmitted to the CAS server
+	 */
+	function logoutWithRedirectServiceAndUrl($service, $url) {
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}
+		if (!is_string($service)) {
+			phpCAS::error('type mismatched for parameter $service (should be `string\')');
+		}
+		if (!is_string($url)) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		$PHPCAS_CLIENT->logout(array("service" => $service, "url" => $url));
+		// never reached
+		phpCAS::traceEnd();
+	}
+	
+	/**
+	 * Set the fixed URL that will be used by the CAS server to transmit the PGT.
+	 * When this method is not called, a phpCAS script uses its own URL for the callback.
+	 *
+	 * @param $url the URL
+	 */
+	function setFixedCallbackURL($url='')
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( !$PHPCAS_CLIENT->isProxy() ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setCallbackURL($url);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * Set the fixed URL that will be set as the CAS service parameter. When this
+	 * method is not called, a phpCAS script uses its own URL.
+	 *
+	 * @param $url the URL
+	 */
+	function setFixedServiceURL($url)
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}  
+		if ( gettype($url) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $url (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setURL($url);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * Get the URL that is set as the CAS service parameter.
+	 */
+	function getServiceURL()
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}  
+		return($PHPCAS_CLIENT->getURL());
+		}
+	
+	/**
+	 * Retrieve a Proxy Ticket from the CAS server.
+	 */
+	function retrievePT($target_service,&$err_code,&$err_msg)
+		{
+		global $PHPCAS_CLIENT;
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::proxy()');
+		}  
+		if ( gettype($target_service) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $target_service(should be `string\')');
+		}
+		return($PHPCAS_CLIENT->retrievePT($target_service,$err_code,$err_msg));
+		}
+	
+	/**
+	 * Set the certificate of the CAS server.
+	 *
+	 * @param $cert the PEM certificate
+	 */
+	function setCasServerCert($cert)
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}  
+		if ( gettype($cert) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $cert (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setCasServerCert($cert);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * Set the certificate of the CAS server CA.
+	 *
+	 * @param $cert the CA certificate
+	 */
+	function setCasServerCACert($cert)
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}  
+		if ( gettype($cert) != 'string' ) {
+			phpCAS::error('type mismatched for parameter $cert (should be `string\')');
+		}
+		$PHPCAS_CLIENT->setCasServerCACert($cert);
+		phpCAS::traceEnd();
+		}
+	
+	/**
+	 * Set no SSL validation for the CAS server.
+	 */
+	function setNoCasServerValidation()
+		{
+		global $PHPCAS_CLIENT;
+		phpCAS::traceBegin();
+		if ( !is_object($PHPCAS_CLIENT) ) {
+			phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		}  
+		$PHPCAS_CLIENT->setNoCasServerValidation();
+		phpCAS::traceEnd();
+		}
+	
+	/** @} */
+	
+  /**
+   * Change CURL options.
+   * CURL is used to connect through HTTPS to CAS server
+   * @param $key the option key
+   * @param $value the value to set
+   */
+   function setExtraCurlOption($key, $value)
+		{
+		  global $PHPCAS_CLIENT;
+		  phpCAS::traceBegin();
+		  if ( !is_object($PHPCAS_CLIENT) ) {
+		  	phpCAS::error('this method should only be called after '.__CLASS__.'::client() or'.__CLASS__.'::proxy()');
+		  }  
+		  $PHPCAS_CLIENT->setExtraCurlOption($key, $value);
+		  phpCAS::traceEnd();
+		}
+
+}
+
+// ########################################################################
+// DOCUMENTATION
+// ########################################################################
+
+// ########################################################################
+//  MAIN PAGE
+
+/**
+ * @mainpage
+ *
+ * The following pages only show the source documentation.
+ *
+ */
+
+// ########################################################################
+//  MODULES DEFINITION
+
+/** @defgroup public User interface */
+
+/** @defgroup publicInit Initialization
+ *  @ingroup public */
+
+/** @defgroup publicAuth Authentication
+ *  @ingroup public */
+
+/** @defgroup publicServices Access to external services
+ *  @ingroup public */
+
+/** @defgroup publicConfig Configuration
+ *  @ingroup public */
+
+/** @defgroup publicLang Internationalization
+ *  @ingroup publicConfig */
+
+/** @defgroup publicOutput HTML output
+ *  @ingroup publicConfig */
+
+/** @defgroup publicPGTStorage PGT storage
+ *  @ingroup publicConfig */
+
+/** @defgroup publicDebug Debugging
+ *  @ingroup public */
+
+
+/** @defgroup internal Implementation */
+
+/** @defgroup internalAuthentication Authentication
+ *  @ingroup internal */
+
+/** @defgroup internalBasic CAS Basic client features (CAS 1.0, Service Tickets)
+ *  @ingroup internal */
+
+/** @defgroup internalProxy CAS Proxy features (CAS 2.0, Proxy Granting Tickets)
+ *  @ingroup internal */
+
+/** @defgroup internalPGTStorage PGT storage
+ *  @ingroup internalProxy */
+
+/** @defgroup internalPGTStorageDB PGT storage in a database
+ *  @ingroup internalPGTStorage */
+
+/** @defgroup internalPGTStorageFile PGT storage on the filesystem
+ *  @ingroup internalPGTStorage */
+
+/** @defgroup internalCallback Callback from the CAS server
+ *  @ingroup internalProxy */
+
+/** @defgroup internalProxied CAS proxied client features (CAS 2.0, Proxy Tickets)
+ *  @ingroup internal */
+
+/** @defgroup internalConfig Configuration
+ *  @ingroup internal */
+
+/** @defgroup internalOutput HTML output
+ *  @ingroup internalConfig */
+
+/** @defgroup internalLang Internationalization
+ *  @ingroup internalConfig
+ *
+ * To add a new language:
+ * - 1. define a new constant PHPCAS_LANG_XXXXXX in CAS/CAS.php
+ * - 2. copy any file from CAS/languages to CAS/languages/XXXXXX.php
+ * - 3. Make the translations
+ */
+
+/** @defgroup internalDebug Debugging
+ *  @ingroup internal */
+
+/** @defgroup internalMisc Miscellaneous
+ *  @ingroup internal */
+
+// ########################################################################
+//  EXAMPLES
+
+/**
+ * @example example_simple.php
+ */
+ /**
+  * @example example_proxy.php
+  */
+  /**
+   * @example example_proxy2.php
+   */
+   /**
+    * @example example_lang.php
+    */
+    /**
+     * @example example_html.php
+     */
+     /**
+      * @example example_file.php
+      */
+      /**
+       * @example example_db.php
+       */
+       /**
+        * @example example_service.php
+        */
+        /**
+         * @example example_session_proxy.php
+         */
+         /**
+          * @example example_session_service.php
+          */
+          /**
+           * @example example_gateway.php
+           */
+
+
+
+?>
diff --git a/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-db.php b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-db.php
new file mode 100644
index 000000000..5a589e4b2
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-db.php
@@ -0,0 +1,190 @@
+<?php
+
+/**
+ * @file CAS/PGTStorage/pgt-db.php
+ * Basic class for PGT database storage
+ */
+
+/**
+ * @class PGTStorageDB
+ * The PGTStorageDB class is a class for PGT database storage. An instance of 
+ * this class is returned by CASClient::SetPGTStorageDB().
+ *
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ *
+ * @ingroup internalPGTStorageDB
+ */
+
+class PGTStorageDB extends PGTStorage
+{
+  /** 
+   * @addtogroup internalPGTStorageDB
+   * @{ 
+   */
+
+  /**
+   * a string representing a PEAR DB URL to connect to the database. Written by
+   * PGTStorageDB::PGTStorageDB(), read by getURL().
+   *
+   * @hideinitializer
+   * @private
+   */
+  var $_url='';
+
+  /**
+   * This method returns the PEAR DB URL to use to connect to the database.
+   *
+   * @return a PEAR DB URL
+   *
+   * @private
+   */
+  function getURL()
+    {
+      return $this->_url;
+    }
+
+  /**
+   * The handle of the connection to the database where PGT's are stored. Written by
+   * PGTStorageDB::init(), read by getLink().
+   *
+   * @hideinitializer
+   * @private
+   */
+  var $_link = null;
+
+  /**
+   * This method returns the handle of the connection to the database where PGT's are 
+   * stored.
+   *
+   * @return a handle of connection.
+   *
+   * @private
+   */
+  function getLink()
+    {
+      return $this->_link;
+    }
+
+  /**
+   * The name of the table where PGT's are stored. Written by 
+   * PGTStorageDB::PGTStorageDB(), read by getTable().
+   *
+   * @hideinitializer
+   * @private
+   */
+  var $_table = '';
+
+  /**
+   * This method returns the name of the table where PGT's are stored.
+   *
+   * @return the name of a table.
+   *
+   * @private
+   */
+  function getTable()
+    {
+      return $this->_table;
+    }
+
+  // ########################################################################
+  //  DEBUGGING
+  // ########################################################################
+  
+  /**
+   * This method returns an informational string giving the type of storage
+   * used by the object (used for debugging purposes).
+   *
+   * @return an informational string.
+   * @public
+   */
+  function getStorageType()
+    {
+      return "database";
+    }
+
+  /**
+   * This method returns an informational string giving informations on the
+   * parameters of the storage.(used for debugging purposes).
+   *
+   * @public
+   */
+  function getStorageInfo()
+    {
+      return 'url=`'.$this->getURL().'\', table=`'.$this->getTable().'\'';
+    }
+
+  // ########################################################################
+  //  CONSTRUCTOR
+  // ########################################################################
+  
+  /**
+   * The class constructor, called by CASClient::SetPGTStorageDB().
+   *
+   * @param $cas_parent the CASClient instance that creates the object.
+   * @param $user the user to access the data with
+   * @param $password the user's password
+   * @param $database_type the type of the database hosting the data
+   * @param $hostname the server hosting the database
+   * @param $port the port the server is listening on
+   * @param $database the name of the database
+   * @param $table the name of the table storing the data
+   *
+   * @public
+   */
+  function PGTStorageDB($cas_parent,$user,$password,$database_type,$hostname,$port,$database,$table)
+    {
+      phpCAS::traceBegin();
+
+      // call the ancestor's constructor
+      $this->PGTStorage($cas_parent);
+
+      if ( empty($database_type) ) $database_type = CAS_PGT_STORAGE_DB_DEFAULT_DATABASE_TYPE;
+      if ( empty($hostname) ) $hostname = CAS_PGT_STORAGE_DB_DEFAULT_HOSTNAME;
+      if ( $port==0 ) $port = CAS_PGT_STORAGE_DB_DEFAULT_PORT;
+      if ( empty($database) ) $database = CAS_PGT_STORAGE_DB_DEFAULT_DATABASE;
+      if ( empty($table) ) $table = CAS_PGT_STORAGE_DB_DEFAULT_TABLE;
+
+      // build and store the PEAR DB URL
+      $this->_url = $database_type.':'.'//'.$user.':'.$password.'@'.$hostname.':'.$port.'/'.$database;
+
+      // XXX should use setURL and setTable
+      phpCAS::traceEnd();
+    }
+  
+  // ########################################################################
+  //  INITIALIZATION
+  // ########################################################################
+  
+  /**
+   * This method is used to initialize the storage. Halts on error.
+   *
+   * @public
+   */
+  function init()
+    {
+      phpCAS::traceBegin();
+      // if the storage has already been initialized, return immediatly
+      if ( $this->isInitialized() )
+		return;
+      // call the ancestor's method (mark as initialized)
+      parent::init();
+      
+	  //include phpDB library (the test was introduced in release 0.4.8 for 
+	  //the integration into Tikiwiki).
+	  if (!class_exists('DB')) {
+		include_once('DB.php');
+	  }
+
+      // try to connect to the database
+      $this->_link = DB::connect($this->getURL());
+      if ( DB::isError($this->_link) ) {
+	phpCAS::error('could not connect to database ('.DB::errorMessage($this->_link).')');
+      }
+      var_dump($this->_link);
+      phpCAS::traceBEnd();
+    }
+
+  /** @} */
+}
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-file.php b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-file.php
new file mode 100644
index 000000000..bc07485b8
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-file.php
@@ -0,0 +1,249 @@
+<?php
+
+/**
+ * @file CAS/PGTStorage/pgt-file.php
+ * Basic class for PGT file storage
+ */
+
+/**
+ * @class PGTStorageFile
+ * The PGTStorageFile class is a class for PGT file storage. An instance of 
+ * this class is returned by CASClient::SetPGTStorageFile().
+ *
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ *
+ * @ingroup internalPGTStorageFile
+ */
+
+class PGTStorageFile extends PGTStorage
+{
+  /** 
+   * @addtogroup internalPGTStorageFile 
+   * @{ 
+   */
+
+  /**
+   * a string telling where PGT's should be stored on the filesystem. Written by
+   * PGTStorageFile::PGTStorageFile(), read by getPath().
+   *
+   * @private
+   */
+  var $_path;
+
+  /**
+   * This method returns the name of the directory where PGT's should be stored 
+   * on the filesystem.
+   *
+   * @return the name of a directory (with leading and trailing '/')
+   *
+   * @private
+   */
+  function getPath()
+    {
+      return $this->_path;
+    }
+
+  /**
+   * a string telling the format to use to store PGT's (plain or xml). Written by
+   * PGTStorageFile::PGTStorageFile(), read by getFormat().
+   *
+   * @private
+   */
+  var $_format;
+
+  /**
+   * This method returns the format to use when storing PGT's on the filesystem.
+   *
+   * @return a string corresponding to the format used (plain or xml).
+   *
+   * @private
+   */
+  function getFormat()
+    {
+      return $this->_format;
+    }
+
+  // ########################################################################
+  //  DEBUGGING
+  // ########################################################################
+  
+  /**
+   * This method returns an informational string giving the type of storage
+   * used by the object (used for debugging purposes).
+   *
+   * @return an informational string.
+   * @public
+   */
+  function getStorageType()
+    {
+      return "file";
+    }
+
+  /**
+   * This method returns an informational string giving informations on the
+   * parameters of the storage.(used for debugging purposes).
+   *
+   * @return an informational string.
+   * @public
+   */
+  function getStorageInfo()
+    {
+      return 'path=`'.$this->getPath().'\', format=`'.$this->getFormat().'\'';
+    }
+
+  // ########################################################################
+  //  CONSTRUCTOR
+  // ########################################################################
+  
+  /**
+   * The class constructor, called by CASClient::SetPGTStorageFile().
+   *
+   * @param $cas_parent the CASClient instance that creates the object.
+   * @param $format the format used to store the PGT's (`plain' and `xml' allowed).
+   * @param $path the path where the PGT's should be stored
+   *
+   * @public
+   */
+  function PGTStorageFile($cas_parent,$format,$path)
+    {
+      phpCAS::traceBegin();
+      // call the ancestor's constructor
+      $this->PGTStorage($cas_parent);
+
+      if (empty($format) ) $format = CAS_PGT_STORAGE_FILE_DEFAULT_FORMAT;
+      if (empty($path) ) $path = CAS_PGT_STORAGE_FILE_DEFAULT_PATH;
+
+      // check that the path is an absolute path
+      if (getenv("OS")=="Windows_NT"){
+      	
+      	 if (!preg_match('`^[a-zA-Z]:`', $path)) {
+	     	phpCAS::error('an absolute path is needed for PGT storage to file');
+      	}
+      	
+      }
+      else
+      {
+      
+      	if ( $path[0] != '/' ) {
+			phpCAS::error('an absolute path is needed for PGT storage to file');
+      	}
+
+      	// store the path (with a leading and trailing '/')      
+      	$path = preg_replace('|[/]*$|','/',$path);
+      	$path = preg_replace('|^[/]*|','/',$path);
+      }
+      
+      $this->_path = $path;
+      // check the format and store it
+      switch ($format) {
+      case CAS_PGT_STORAGE_FILE_FORMAT_PLAIN:
+      case CAS_PGT_STORAGE_FILE_FORMAT_XML:
+	$this->_format = $format;
+	break;
+      default:
+	phpCAS::error('unknown PGT file storage format (`'.CAS_PGT_STORAGE_FILE_FORMAT_PLAIN.'\' and `'.CAS_PGT_STORAGE_FILE_FORMAT_XML.'\' allowed)');
+      }
+      phpCAS::traceEnd();      
+    }
+
+  // ########################################################################
+  //  INITIALIZATION
+  // ########################################################################
+  
+  /**
+   * This method is used to initialize the storage. Halts on error.
+   *
+   * @public
+   */
+  function init()
+    {
+      phpCAS::traceBegin();
+      // if the storage has already been initialized, return immediatly
+      if ( $this->isInitialized() )
+	return;
+      // call the ancestor's method (mark as initialized)
+      parent::init();
+      phpCAS::traceEnd();      
+    }
+
+  // ########################################################################
+  //  PGT I/O
+  // ########################################################################
+
+  /**
+   * This method returns the filename corresponding to a PGT Iou.
+   *
+   * @param $pgt_iou the PGT iou.
+   *
+   * @return a filename
+   * @private
+   */
+  function getPGTIouFilename($pgt_iou)
+    {
+      phpCAS::traceBegin();
+      $filename = $this->getPath().$pgt_iou.'.'.$this->getFormat();
+      phpCAS::traceEnd($filename);
+      return $filename;
+    }
+  
+  /**
+   * This method stores a PGT and its corresponding PGT Iou into a file. Echoes a
+   * warning on error.
+   *
+   * @param $pgt the PGT
+   * @param $pgt_iou the PGT iou
+   *
+   * @public
+   */
+  function write($pgt,$pgt_iou)
+    {
+      phpCAS::traceBegin();
+      $fname = $this->getPGTIouFilename($pgt_iou);
+      if ( $f=fopen($fname,"w") ) {
+	if ( fputs($f,$pgt) === FALSE ) {
+	  phpCAS::error('could not write PGT to `'.$fname.'\'');
+	}
+	fclose($f);
+      } else {
+	phpCAS::error('could not open `'.$fname.'\'');
+      }
+      phpCAS::traceEnd();      
+    }
+
+  /**
+   * This method reads a PGT corresponding to a PGT Iou and deletes the 
+   * corresponding file.
+   *
+   * @param $pgt_iou the PGT iou
+   *
+   * @return the corresponding PGT, or FALSE on error
+   *
+   * @public
+   */
+  function read($pgt_iou)
+    {
+      phpCAS::traceBegin();
+      $pgt = FALSE;
+      $fname = $this->getPGTIouFilename($pgt_iou);
+      if ( !($f=fopen($fname,"r")) ) {
+	phpCAS::trace('could not open `'.$fname.'\'');
+      } else {
+	if ( ($pgt=fgets($f)) === FALSE ) {
+	  phpCAS::trace('could not read PGT from `'.$fname.'\'');
+	} 
+	fclose($f);
+      }
+
+      // delete the PGT file
+      @unlink($fname);
+
+      phpCAS::traceEnd($pgt);
+      return $pgt;
+    }
+  
+  /** @} */
+  
+}
+
+  
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-main.php b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-main.php
new file mode 100644
index 000000000..cd9b49967
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/PGTStorage/pgt-main.php
@@ -0,0 +1,188 @@
+<?php
+
+/**
+ * @file CAS/PGTStorage/pgt-main.php
+ * Basic class for PGT storage
+ */
+
+/**
+ * @class PGTStorage
+ * The PGTStorage class is a generic class for PGT storage. This class should
+ * not be instanciated itself but inherited by specific PGT storage classes.
+ *
+ * @author   Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ *
+ * @ingroup internalPGTStorage
+ */
+
+class PGTStorage
+{
+  /** 
+   * @addtogroup internalPGTStorage
+   * @{ 
+   */
+
+  // ########################################################################
+  //  CONSTRUCTOR
+  // ########################################################################
+  
+  /**
+   * The constructor of the class, should be called only by inherited classes.
+   *
+   * @param $cas_parent the CASclient instance that creates the current object.
+   *
+   * @protected
+   */
+  function PGTStorage($cas_parent)
+    {
+      phpCAS::traceBegin();
+      if ( !$cas_parent->isProxy() ) {
+	phpCAS::error('defining PGT storage makes no sense when not using a CAS proxy'); 
+      }
+      phpCAS::traceEnd();
+    }
+
+  // ########################################################################
+  //  DEBUGGING
+  // ########################################################################
+  
+  /**
+   * This virtual method returns an informational string giving the type of storage
+   * used by the object (used for debugging purposes).
+   *
+   * @public
+   */
+  function getStorageType()
+    {
+      phpCAS::error(__CLASS__.'::'.__FUNCTION__.'() should never be called'); 
+    }
+
+  /**
+   * This virtual method returns an informational string giving informations on the
+   * parameters of the storage.(used for debugging purposes).
+   *
+   * @public
+   */
+  function getStorageInfo()
+    {
+      phpCAS::error(__CLASS__.'::'.__FUNCTION__.'() should never be called'); 
+    }
+
+  // ########################################################################
+  //  ERROR HANDLING
+  // ########################################################################
+  
+  /**
+   * string used to store an error message. Written by PGTStorage::setErrorMessage(),
+   * read by PGTStorage::getErrorMessage().
+   *
+   * @hideinitializer
+   * @private
+   * @deprecated not used.
+   */
+  var $_error_message=FALSE;
+
+  /**
+   * This method sets en error message, which can be read later by 
+   * PGTStorage::getErrorMessage().
+   *
+   * @param $error_message an error message
+   *
+   * @protected
+   * @deprecated not used.
+   */
+  function setErrorMessage($error_message)
+    {
+      $this->_error_message = $error_message;
+    }
+
+  /**
+   * This method returns an error message set by PGTStorage::setErrorMessage().
+   *
+   * @return an error message when set by PGTStorage::setErrorMessage(), FALSE
+   * otherwise.
+   *
+   * @public
+   * @deprecated not used.
+   */
+  function getErrorMessage()
+    {
+      return $this->_error_message;
+    }
+
+  // ########################################################################
+  //  INITIALIZATION
+  // ########################################################################
+
+  /**
+   * a boolean telling if the storage has already been initialized. Written by 
+   * PGTStorage::init(), read by PGTStorage::isInitialized().
+   *
+   * @hideinitializer
+   * @private
+   */
+  var $_initialized = FALSE;
+
+  /**
+   * This method tells if the storage has already been intialized.
+   *
+   * @return a boolean
+   *
+   * @protected
+   */
+  function isInitialized()
+    {
+      return $this->_initialized;
+    }
+
+  /**
+   * This virtual method initializes the object.
+   *
+   * @protected
+   */
+  function init()
+    {
+      $this->_initialized = TRUE;
+    }
+
+  // ########################################################################
+  //  PGT I/O
+  // ########################################################################
+
+  /**
+   * This virtual method stores a PGT and its corresponding PGT Iuo.
+   * @note Should never be called.
+   *
+   * @param $pgt the PGT
+   * @param $pgt_iou the PGT iou
+   *
+   * @protected
+   */
+  function write($pgt,$pgt_iou)
+    {
+      phpCAS::error(__CLASS__.'::'.__FUNCTION__.'() should never be called'); 
+    }
+
+  /**
+   * This virtual method reads a PGT corresponding to a PGT Iou and deletes
+   * the corresponding storage entry.
+   * @note Should never be called.
+   *
+   * @param $pgt_iou the PGT iou
+   *
+   * @protected
+   */
+  function read($pgt_iou)
+    {
+      phpCAS::error(__CLASS__.'::'.__FUNCTION__.'() should never be called'); 
+    }
+
+  /** @} */
+  
+} 
+
+// include specific PGT storage classes
+include_once(dirname(__FILE__).'/pgt-file.php'); 
+include_once(dirname(__FILE__).'/pgt-db.php');
+  
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/client.php b/plugins/CasAuthentication/extlib/CAS/client.php
new file mode 100644
index 000000000..bfea59052
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/client.php
@@ -0,0 +1,2297 @@
+<?php
+
+/**
+ * @file CAS/client.php
+ * Main class of the phpCAS library
+ */
+
+// include internationalization stuff
+include_once(dirname(__FILE__).'/languages/languages.php');
+
+// include PGT storage classes
+include_once(dirname(__FILE__).'/PGTStorage/pgt-main.php');
+
+/**
+ * @class CASClient
+ * The CASClient class is a client interface that provides CAS authentication
+ * to PHP applications.
+ *
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ */
+
+class CASClient
+{
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                          CONFIGURATION                             XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	// ########################################################################
+	//  HTML OUTPUT
+	// ########################################################################
+	/**
+	 * @addtogroup internalOutput
+	 * @{
+	 */  
+	
+	/**
+	 * This method filters a string by replacing special tokens by appropriate values
+	 * and prints it. The corresponding tokens are taken into account:
+	 * - __CAS_VERSION__
+	 * - __PHPCAS_VERSION__
+	 * - __SERVER_BASE_URL__
+	 *
+	 * Used by CASClient::PrintHTMLHeader() and CASClient::printHTMLFooter().
+	 *
+	 * @param $str the string to filter and output
+	 *
+	 * @private
+	 */
+	function HTMLFilterOutput($str)
+		{
+		$str = str_replace('__CAS_VERSION__',$this->getServerVersion(),$str);
+		$str = str_replace('__PHPCAS_VERSION__',phpCAS::getVersion(),$str);
+		$str = str_replace('__SERVER_BASE_URL__',$this->getServerBaseURL(),$str);
+		echo $str;
+		}
+	
+	/**
+	 * A string used to print the header of HTML pages. Written by CASClient::setHTMLHeader(),
+	 * read by CASClient::printHTMLHeader().
+	 *
+	 * @hideinitializer
+	 * @private
+	 * @see CASClient::setHTMLHeader, CASClient::printHTMLHeader()
+	 */
+	var $_output_header = '';
+	
+	/**
+	 * This method prints the header of the HTML output (after filtering). If
+	 * CASClient::setHTMLHeader() was not used, a default header is output.
+	 *
+	 * @param $title the title of the page
+	 *
+	 * @see HTMLFilterOutput()
+	 * @private
+	 */
+	function printHTMLHeader($title)
+		{
+		$this->HTMLFilterOutput(str_replace('__TITLE__',
+			$title,
+			(empty($this->_output_header)
+					? '<html><head><title>__TITLE__</title></head><body><h1>__TITLE__</h1>'
+							: $this->_output_header)
+		)
+		);
+		}
+	
+	/**
+	 * A string used to print the footer of HTML pages. Written by CASClient::setHTMLFooter(),
+	 * read by printHTMLFooter().
+	 *
+	 * @hideinitializer
+	 * @private
+	 * @see CASClient::setHTMLFooter, CASClient::printHTMLFooter()
+	 */
+	var $_output_footer = '';
+	
+	/**
+	 * This method prints the footer of the HTML output (after filtering). If
+	 * CASClient::setHTMLFooter() was not used, a default footer is output.
+	 *
+	 * @see HTMLFilterOutput()
+	 * @private
+	 */
+	function printHTMLFooter()
+		{
+		$this->HTMLFilterOutput(empty($this->_output_footer)
+			?('<hr><address>phpCAS __PHPCAS_VERSION__ '.$this->getString(CAS_STR_USING_SERVER).' <a href="__SERVER_BASE_URL__">__SERVER_BASE_URL__</a> (CAS __CAS_VERSION__)</a></address></body></html>')
+					:$this->_output_footer);
+		}
+	
+	/**
+	 * This method set the HTML header used for all outputs.
+	 *
+	 * @param $header the HTML header.
+	 *
+	 * @public
+	 */
+	function setHTMLHeader($header)
+		{
+		$this->_output_header = $header;
+		}
+	
+	/**
+	 * This method set the HTML footer used for all outputs.
+	 *
+	 * @param $footer the HTML footer.
+	 *
+	 * @public
+	 */
+	function setHTMLFooter($footer)
+		{
+		$this->_output_footer = $footer;
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  INTERNATIONALIZATION
+	// ########################################################################
+	/**
+	 * @addtogroup internalLang
+	 * @{
+	 */  
+	/**
+	 * A string corresponding to the language used by phpCAS. Written by 
+	 * CASClient::setLang(), read by CASClient::getLang().
+	 
+	 * @note debugging information is always in english (debug purposes only).
+	 *
+	 * @hideinitializer
+	 * @private
+	 * @sa CASClient::_strings, CASClient::getString()
+	 */
+	var $_lang = '';
+	
+	/**
+	 * This method returns the language used by phpCAS.
+	 *
+	 * @return a string representing the language
+	 *
+	 * @private
+	 */
+	function getLang()
+		{
+		if ( empty($this->_lang) )
+			$this->setLang(PHPCAS_LANG_DEFAULT);
+		return $this->_lang;
+		}
+	
+	/**
+	 * array containing the strings used by phpCAS. Written by CASClient::setLang(), read by 
+	 * CASClient::getString() and used by CASClient::setLang().
+	 *
+	 * @note This array is filled by instructions in CAS/languages/<$this->_lang>.php
+	 *
+	 * @private
+	 * @see CASClient::_lang, CASClient::getString(), CASClient::setLang(), CASClient::getLang()
+	 */
+	var $_strings;
+	
+	/**
+	 * This method returns a string depending on the language.
+	 *
+	 * @param $str the index of the string in $_string.
+	 *
+	 * @return the string corresponding to $index in $string.
+	 *
+	 * @private
+	 */
+	function getString($str)
+		{
+		// call CASclient::getLang() to be sure the language is initialized
+		$this->getLang();
+		
+		if ( !isset($this->_strings[$str]) ) {
+			trigger_error('string `'.$str.'\' not defined for language `'.$this->getLang().'\'',E_USER_ERROR);
+		}
+		return $this->_strings[$str];
+		}
+	
+	/**
+	 * This method is used to set the language used by phpCAS. 
+	 * @note Can be called only once.
+	 *
+	 * @param $lang a string representing the language.
+	 *
+	 * @public
+	 * @sa CAS_LANG_FRENCH, CAS_LANG_ENGLISH
+	 */
+	function setLang($lang)
+		{
+		// include the corresponding language file
+		include_once(dirname(__FILE__).'/languages/'.$lang.'.php');
+		
+		if ( !is_array($this->_strings) ) {
+			trigger_error('language `'.$lang.'\' is not implemented',E_USER_ERROR);
+		}
+		$this->_lang = $lang;
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  CAS SERVER CONFIG
+	// ########################################################################
+	/**
+	 * @addtogroup internalConfig
+	 * @{
+	 */  
+	
+	/**
+	 * a record to store information about the CAS server.
+	 * - $_server["version"]: the version of the CAS server
+	 * - $_server["hostname"]: the hostname of the CAS server
+	 * - $_server["port"]: the port the CAS server is running on
+	 * - $_server["uri"]: the base URI the CAS server is responding on
+	 * - $_server["base_url"]: the base URL of the CAS server
+	 * - $_server["login_url"]: the login URL of the CAS server
+	 * - $_server["service_validate_url"]: the service validating URL of the CAS server
+	 * - $_server["proxy_url"]: the proxy URL of the CAS server
+	 * - $_server["proxy_validate_url"]: the proxy validating URL of the CAS server
+	 * - $_server["logout_url"]: the logout URL of the CAS server
+	 *
+	 * $_server["version"], $_server["hostname"], $_server["port"] and $_server["uri"]
+	 * are written by CASClient::CASClient(), read by CASClient::getServerVersion(), 
+	 * CASClient::getServerHostname(), CASClient::getServerPort() and CASClient::getServerURI().
+	 *
+	 * The other fields are written and read by CASClient::getServerBaseURL(), 
+	 * CASClient::getServerLoginURL(), CASClient::getServerServiceValidateURL(), 
+	 * CASClient::getServerProxyValidateURL() and CASClient::getServerLogoutURL().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_server = array(
+		'version' => -1,
+		'hostname' => 'none',
+		'port' => -1,
+		'uri' => 'none'
+	);
+	
+	/**
+	 * This method is used to retrieve the version of the CAS server.
+	 * @return the version of the CAS server.
+	 * @private
+	 */
+	function getServerVersion()
+		{ 
+		return $this->_server['version']; 
+		}
+	
+	/**
+	 * This method is used to retrieve the hostname of the CAS server.
+	 * @return the hostname of the CAS server.
+	 * @private
+	 */
+	function getServerHostname()
+		{ return $this->_server['hostname']; }
+	
+	/**
+	 * This method is used to retrieve the port of the CAS server.
+	 * @return the port of the CAS server.
+	 * @private
+	 */
+	function getServerPort()
+		{ return $this->_server['port']; }
+	
+	/**
+	 * This method is used to retrieve the URI of the CAS server.
+	 * @return a URI.
+	 * @private
+	 */
+	function getServerURI()
+		{ return $this->_server['uri']; }
+	
+	/**
+	 * This method is used to retrieve the base URL of the CAS server.
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerBaseURL()
+		{ 
+		// the URL is build only when needed
+		if ( empty($this->_server['base_url']) ) {
+			$this->_server['base_url'] = 'https://'
+				.$this->getServerHostname()
+				.':'
+				.$this->getServerPort()
+				.$this->getServerURI();
+		}
+		return $this->_server['base_url']; 
+		}
+	
+	/**
+	 * This method is used to retrieve the login URL of the CAS server.
+	 * @param $gateway true to check authentication, false to force it
+	 * @param $renew true to force the authentication with the CAS server
+	 * NOTE : It is recommended that CAS implementations ignore the
+	 "gateway" parameter if "renew" is set
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerLoginURL($gateway=false,$renew=false) {
+		phpCAS::traceBegin();
+		// the URL is build only when needed
+		if ( empty($this->_server['login_url']) ) {
+			$this->_server['login_url'] = $this->getServerBaseURL();
+			$this->_server['login_url'] .= 'login?service=';
+			// $this->_server['login_url'] .= preg_replace('/&/','%26',$this->getURL());
+			$this->_server['login_url'] .= urlencode($this->getURL());
+			if($renew) {
+				// It is recommended that when the "renew" parameter is set, its value be "true"
+				$this->_server['login_url'] .= '&renew=true';
+			} elseif ($gateway) {
+				// It is recommended that when the "gateway" parameter is set, its value be "true"
+				$this->_server['login_url'] .= '&gateway=true';
+			}
+		}
+		phpCAS::traceEnd($this->_server['login_url']);
+		return $this->_server['login_url'];
+	} 
+	
+	/**
+	 * This method sets the login URL of the CAS server.
+	 * @param $url the login URL
+	 * @private
+	 * @since 0.4.21 by Wyman Chan
+	 */
+	function setServerLoginURL($url)
+		{
+		return $this->_server['login_url'] = $url;
+		}
+	
+	/**
+	 * This method is used to retrieve the service validating URL of the CAS server.
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerServiceValidateURL()
+		{ 
+		// the URL is build only when needed
+		if ( empty($this->_server['service_validate_url']) ) {
+			switch ($this->getServerVersion()) {
+				case CAS_VERSION_1_0:
+					$this->_server['service_validate_url'] = $this->getServerBaseURL().'validate';
+					break;
+				case CAS_VERSION_2_0:
+					$this->_server['service_validate_url'] = $this->getServerBaseURL().'serviceValidate';
+					break;
+			}
+		}
+		//      return $this->_server['service_validate_url'].'?service='.preg_replace('/&/','%26',$this->getURL()); 
+		return $this->_server['service_validate_url'].'?service='.urlencode($this->getURL()); 
+		}
+	
+	/**
+	 * This method is used to retrieve the proxy validating URL of the CAS server.
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerProxyValidateURL()
+		{ 
+		// the URL is build only when needed
+		if ( empty($this->_server['proxy_validate_url']) ) {
+			switch ($this->getServerVersion()) {
+				case CAS_VERSION_1_0:
+					$this->_server['proxy_validate_url'] = '';
+					break;
+				case CAS_VERSION_2_0:
+					$this->_server['proxy_validate_url'] = $this->getServerBaseURL().'proxyValidate';
+					break;
+			}
+		}
+		//      return $this->_server['proxy_validate_url'].'?service='.preg_replace('/&/','%26',$this->getURL()); 
+		return $this->_server['proxy_validate_url'].'?service='.urlencode($this->getURL()); 
+		}
+	
+	/**
+	 * This method is used to retrieve the proxy URL of the CAS server.
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerProxyURL()
+		{ 
+		// the URL is build only when needed
+		if ( empty($this->_server['proxy_url']) ) {
+			switch ($this->getServerVersion()) {
+				case CAS_VERSION_1_0:
+					$this->_server['proxy_url'] = '';
+					break;
+				case CAS_VERSION_2_0:
+					$this->_server['proxy_url'] = $this->getServerBaseURL().'proxy';
+					break;
+			}
+		}
+		return $this->_server['proxy_url']; 
+		}
+	
+	/**
+	 * This method is used to retrieve the logout URL of the CAS server.
+	 * @return a URL.
+	 * @private
+	 */
+	function getServerLogoutURL()
+		{ 
+		// the URL is build only when needed
+		if ( empty($this->_server['logout_url']) ) {
+			$this->_server['logout_url'] = $this->getServerBaseURL().'logout';
+		}
+		return $this->_server['logout_url']; 
+		}
+	
+	/**
+	 * This method sets the logout URL of the CAS server.
+	 * @param $url the logout URL
+	 * @private
+	 * @since 0.4.21 by Wyman Chan
+	 */
+	function setServerLogoutURL($url)
+		{
+		return $this->_server['logout_url'] = $url;
+		}
+
+	/**
+	 * An array to store extra curl options.
+	 */	
+	var $_curl_options = array();
+
+	/**
+	 * This method is used to set additional user curl options.
+	 */
+	function setExtraCurlOption($key, $value)
+	{
+		$this->_curl_options[$key] = $value;
+	}
+ 
+	/**
+	 * This method checks to see if the request is secured via HTTPS
+	 * @return true if https, false otherwise
+	 * @private
+	 */
+	function isHttps() {
+		//if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) ) {
+		//0.4.24 by Hinnack
+		if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
+			return true;
+		} else {
+			return false;
+		}
+	}
+	
+	// ########################################################################
+	//  CONSTRUCTOR
+	// ########################################################################
+	/**
+	 * CASClient constructor.
+	 *
+	 * @param $server_version the version of the CAS server
+	 * @param $proxy TRUE if the CAS client is a CAS proxy, FALSE otherwise
+	 * @param $server_hostname the hostname of the CAS server
+	 * @param $server_port the port the CAS server is running on
+	 * @param $server_uri the URI the CAS server is responding on
+	 * @param $start_session Have phpCAS start PHP sessions (default true)
+	 *
+	 * @return a newly created CASClient object
+	 *
+	 * @public
+	 */
+	function CASClient(
+					   $server_version,
+					   $proxy,
+					   $server_hostname,
+					   $server_port,
+					   $server_uri,
+					   $start_session = true) {
+		
+		phpCAS::traceBegin();
+		
+		if (!$this->isLogoutRequest() && !empty($_GET['ticket']) && $start_session) {
+            // copy old session vars and destroy the current session
+            if (!isset($_SESSION)) {
+            	session_start();
+            }
+            $old_session = $_SESSION;
+            session_destroy();
+            // set up a new session, of name based on the ticket
+			$session_id = preg_replace('/[^\w]/','',$_GET['ticket']);
+			phpCAS::LOG("Session ID: " . $session_id);
+			session_id($session_id);
+            if (!isset($_SESSION)) {
+            	session_start();
+            }
+            // restore old session vars
+            $_SESSION = $old_session;
+            // Redirect to location without ticket.
+            header('Location: '.$this->getURL());
+		}
+		
+		//activate session mechanism if desired
+		if (!$this->isLogoutRequest() && $start_session) {
+			session_start();
+		}
+		
+		$this->_proxy = $proxy;
+		
+		//check version
+		switch ($server_version) {
+			case CAS_VERSION_1_0:
+				if ( $this->isProxy() )
+					phpCAS::error('CAS proxies are not supported in CAS '
+						.$server_version);
+				break;
+			case CAS_VERSION_2_0:
+				break;
+			default:
+				phpCAS::error('this version of CAS (`'
+					.$server_version
+					.'\') is not supported by phpCAS '
+					.phpCAS::getVersion());
+		}
+		$this->_server['version'] = $server_version;
+		
+		//check hostname
+		if ( empty($server_hostname) 
+				|| !preg_match('/[\.\d\-abcdefghijklmnopqrstuvwxyz]*/',$server_hostname) ) {
+			phpCAS::error('bad CAS server hostname (`'.$server_hostname.'\')');
+		}
+		$this->_server['hostname'] = $server_hostname;
+		
+		//check port
+		if ( $server_port == 0 
+			|| !is_int($server_port) ) {
+			phpCAS::error('bad CAS server port (`'.$server_hostname.'\')');
+		}
+		$this->_server['port'] = $server_port;
+		
+		//check URI
+		if ( !preg_match('/[\.\d\-_abcdefghijklmnopqrstuvwxyz\/]*/',$server_uri) ) {
+			phpCAS::error('bad CAS server URI (`'.$server_uri.'\')');
+		}
+		//add leading and trailing `/' and remove doubles      
+		$server_uri = preg_replace('/\/\//','/','/'.$server_uri.'/');
+		$this->_server['uri'] = $server_uri;
+		
+		//set to callback mode if PgtIou and PgtId CGI GET parameters are provided 
+		if ( $this->isProxy() ) {
+			$this->setCallbackMode(!empty($_GET['pgtIou'])&&!empty($_GET['pgtId']));
+		}
+		
+		if ( $this->isCallbackMode() ) {
+			//callback mode: check that phpCAS is secured
+			if ( !$this->isHttps() ) {
+				phpCAS::error('CAS proxies must be secured to use phpCAS; PGT\'s will not be received from the CAS server');
+			}
+		} else {
+			//normal mode: get ticket and remove it from CGI parameters for developpers
+			$ticket = (isset($_GET['ticket']) ? $_GET['ticket'] : null);
+			switch ($this->getServerVersion()) {
+				case CAS_VERSION_1_0: // check for a Service Ticket
+					if( preg_match('/^ST-/',$ticket) ) {
+						phpCAS::trace('ST \''.$ticket.'\' found');
+						//ST present
+						$this->setST($ticket);
+						//ticket has been taken into account, unset it to hide it to applications
+						unset($_GET['ticket']);
+					} else if ( !empty($ticket) ) {
+						//ill-formed ticket, halt
+						phpCAS::error('ill-formed ticket found in the URL (ticket=`'.htmlentities($ticket).'\')');
+					}
+					break;
+				case CAS_VERSION_2_0: // check for a Service or Proxy Ticket
+					if( preg_match('/^[SP]T-/',$ticket) ) {
+						phpCAS::trace('ST or PT \''.$ticket.'\' found');
+						$this->setPT($ticket);
+						unset($_GET['ticket']);
+					} else if ( !empty($ticket) ) {
+						//ill-formed ticket, halt
+						phpCAS::error('ill-formed ticket found in the URL (ticket=`'.htmlentities($ticket).'\')');
+					} 
+					break;
+			}
+		}
+		phpCAS::traceEnd();
+	}
+	
+	/** @} */
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                           AUTHENTICATION                           XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	/**
+	 * @addtogroup internalAuthentication
+	 * @{
+	 */  
+	
+	/**
+	 * The Authenticated user. Written by CASClient::setUser(), read by CASClient::getUser().
+	 * @attention client applications should use phpCAS::getUser().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_user = '';
+	
+	/**
+	 * This method sets the CAS user's login name.
+	 *
+	 * @param $user the login name of the authenticated user.
+	 *
+	 * @private
+	 */
+	function setUser($user)
+		{
+		$this->_user = $user;
+		}
+	
+	/**
+	 * This method returns the CAS user's login name.
+	 * @warning should be called only after CASClient::forceAuthentication() or 
+	 * CASClient::isAuthenticated(), otherwise halt with an error.
+	 *
+	 * @return the login name of the authenticated user
+	 */
+	function getUser()
+		{
+		if ( empty($this->_user) ) {
+			phpCAS::error('this method should be used only after '.__CLASS__.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()');
+		}
+		return $this->_user;
+		}
+	
+	/**
+	 * This method is called to renew the authentication of the user
+	 * If the user is authenticated, renew the connection
+	 * If not, redirect to CAS
+	 * @public
+	 */
+	function renewAuthentication(){
+		phpCAS::traceBegin();
+		// Either way, the user is authenticated by CAS
+		if( isset( $_SESSION['phpCAS']['auth_checked'] ) )
+			unset($_SESSION['phpCAS']['auth_checked']);
+		if ( $this->isAuthenticated() ) {
+			phpCAS::trace('user already authenticated; renew');
+			$this->redirectToCas(false,true);
+		} else {
+			$this->redirectToCas();
+		}
+		phpCAS::traceEnd();
+	}
+
+	/**
+	 * This method is called to be sure that the user is authenticated. When not 
+	 * authenticated, halt by redirecting to the CAS server; otherwise return TRUE.
+	 * @return TRUE when the user is authenticated; otherwise halt.
+	 * @public
+	 */
+	function forceAuthentication()
+		{
+		phpCAS::traceBegin();
+		
+		if ( $this->isAuthenticated() ) {
+			// the user is authenticated, nothing to be done.
+			phpCAS::trace('no need to authenticate');
+			$res = TRUE;
+		} else {
+			// the user is not authenticated, redirect to the CAS server
+			if (isset($_SESSION['phpCAS']['auth_checked'])) {
+				unset($_SESSION['phpCAS']['auth_checked']);
+			}
+			$this->redirectToCas(FALSE/* no gateway */);	
+			// never reached
+			$res = FALSE;
+		}
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/**
+	 * An integer that gives the number of times authentication will be cached before rechecked.
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_cache_times_for_auth_recheck = 0;
+	
+	/**
+	 * Set the number of times authentication will be cached before rechecked.
+	 *
+	 * @param $n an integer.
+	 *
+	 * @public
+	 */
+	function setCacheTimesForAuthRecheck($n)
+		{
+		$this->_cache_times_for_auth_recheck = $n;
+		}
+	
+	/**
+	 * This method is called to check whether the user is authenticated or not.
+	 * @return TRUE when the user is authenticated, FALSE otherwise.
+	 * @public
+	 */
+	function checkAuthentication()
+		{
+		phpCAS::traceBegin();
+		
+		if ( $this->isAuthenticated() ) {
+			phpCAS::trace('user is authenticated');
+			$res = TRUE;
+		} else if (isset($_SESSION['phpCAS']['auth_checked'])) {
+			// the previous request has redirected the client to the CAS server with gateway=true
+			unset($_SESSION['phpCAS']['auth_checked']);
+			$res = FALSE;
+		} else {
+			//        $_SESSION['phpCAS']['auth_checked'] = true;
+			//	    $this->redirectToCas(TRUE/* gateway */);	
+			//	    // never reached
+			//	    $res = FALSE;
+			// avoid a check against CAS on every request
+			if (! isset($_SESSION['phpCAS']['unauth_count']) )
+				$_SESSION['phpCAS']['unauth_count'] = -2; // uninitialized
+			
+			if (($_SESSION['phpCAS']['unauth_count'] != -2 && $this->_cache_times_for_auth_recheck == -1) 
+					|| ($_SESSION['phpCAS']['unauth_count'] >= 0 && $_SESSION['phpCAS']['unauth_count'] < $this->_cache_times_for_auth_recheck))
+			{
+				$res = FALSE;
+				
+				if ($this->_cache_times_for_auth_recheck != -1)
+				{
+					$_SESSION['phpCAS']['unauth_count']++;
+					phpCAS::trace('user is not authenticated (cached for '.$_SESSION['phpCAS']['unauth_count'].' times of '.$this->_cache_times_for_auth_recheck.')');
+				}
+				else
+				{
+					phpCAS::trace('user is not authenticated (cached for until login pressed)');
+				}
+			}
+			else
+			{
+				$_SESSION['phpCAS']['unauth_count'] = 0;
+				$_SESSION['phpCAS']['auth_checked'] = true;
+				phpCAS::trace('user is not authenticated (cache reset)');
+				$this->redirectToCas(TRUE/* gateway */);	
+				// never reached
+				$res = FALSE;
+			}
+		}
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/**
+	 * This method is called to check if the user is authenticated (previously or by
+	 * tickets given in the URL).
+	 *
+	 * @return TRUE when the user is authenticated.
+	 *
+	 * @public
+	 */
+	function isAuthenticated()
+		{
+		phpCAS::traceBegin();
+		$res = FALSE;
+		$validate_url = '';
+		
+		if ( $this->wasPreviouslyAuthenticated() ) {
+			// the user has already (previously during the session) been 
+			// authenticated, nothing to be done.
+			phpCAS::trace('user was already authenticated, no need to look for tickets');
+			$res = TRUE;
+		} 
+		elseif ( $this->hasST() ) {
+			// if a Service Ticket was given, validate it
+			phpCAS::trace('ST `'.$this->getST().'\' is present');
+			$this->validateST($validate_url,$text_response,$tree_response); // if it fails, it halts
+			phpCAS::trace('ST `'.$this->getST().'\' was validated');
+			if ( $this->isProxy() ) {
+				$this->validatePGT($validate_url,$text_response,$tree_response); // idem
+				phpCAS::trace('PGT `'.$this->getPGT().'\' was validated');
+				$_SESSION['phpCAS']['pgt'] = $this->getPGT();
+			}
+			$_SESSION['phpCAS']['user'] = $this->getUser();
+			$res = TRUE;
+		}
+		elseif ( $this->hasPT() ) {
+			// if a Proxy Ticket was given, validate it
+			phpCAS::trace('PT `'.$this->getPT().'\' is present');
+			$this->validatePT($validate_url,$text_response,$tree_response); // note: if it fails, it halts
+			phpCAS::trace('PT `'.$this->getPT().'\' was validated');
+			if ( $this->isProxy() ) {
+				$this->validatePGT($validate_url,$text_response,$tree_response); // idem
+				phpCAS::trace('PGT `'.$this->getPGT().'\' was validated');
+				$_SESSION['phpCAS']['pgt'] = $this->getPGT();
+			}
+			$_SESSION['phpCAS']['user'] = $this->getUser();
+			$res = TRUE;
+		} 
+		else {
+			// no ticket given, not authenticated
+			phpCAS::trace('no ticket found');
+		}
+		
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/**
+	 * This method tells if the current session is authenticated.
+	 * @return true if authenticated based soley on $_SESSION variable
+	 * @since 0.4.22 by Brendan Arnold
+	 */
+	function isSessionAuthenticated ()
+		{
+		return !empty($_SESSION['phpCAS']['user']);
+		}
+	
+	/**
+	 * This method tells if the user has already been (previously) authenticated
+	 * by looking into the session variables.
+	 *
+	 * @note This function switches to callback mode when needed.
+	 *
+	 * @return TRUE when the user has already been authenticated; FALSE otherwise.
+	 *
+	 * @private
+	 */
+	function wasPreviouslyAuthenticated()
+		{
+		phpCAS::traceBegin();
+		
+		if ( $this->isCallbackMode() ) {
+			$this->callback();
+		}
+		
+		$auth = FALSE;
+		
+		if ( $this->isProxy() ) {
+			// CAS proxy: username and PGT must be present
+			if ( $this->isSessionAuthenticated() && !empty($_SESSION['phpCAS']['pgt']) ) {
+				// authentication already done
+				$this->setUser($_SESSION['phpCAS']['user']);
+				$this->setPGT($_SESSION['phpCAS']['pgt']);
+				phpCAS::trace('user = `'.$_SESSION['phpCAS']['user'].'\', PGT = `'.$_SESSION['phpCAS']['pgt'].'\''); 
+				$auth = TRUE;
+			} elseif ( $this->isSessionAuthenticated() && empty($_SESSION['phpCAS']['pgt']) ) {
+				// these two variables should be empty or not empty at the same time
+				phpCAS::trace('username found (`'.$_SESSION['phpCAS']['user'].'\') but PGT is empty');
+				// unset all tickets to enforce authentication
+				unset($_SESSION['phpCAS']);
+				$this->setST('');
+				$this->setPT('');
+			} elseif ( !$this->isSessionAuthenticated() && !empty($_SESSION['phpCAS']['pgt']) ) {
+				// these two variables should be empty or not empty at the same time
+				phpCAS::trace('PGT found (`'.$_SESSION['phpCAS']['pgt'].'\') but username is empty'); 
+				// unset all tickets to enforce authentication
+				unset($_SESSION['phpCAS']);
+				$this->setST('');
+				$this->setPT('');
+			} else {
+				phpCAS::trace('neither user not PGT found'); 
+			}
+		} else {
+			// `simple' CAS client (not a proxy): username must be present
+			if ( $this->isSessionAuthenticated() ) {
+				// authentication already done
+				$this->setUser($_SESSION['phpCAS']['user']);
+				phpCAS::trace('user = `'.$_SESSION['phpCAS']['user'].'\''); 
+				$auth = TRUE;
+			} else {
+				phpCAS::trace('no user found');
+			}
+		}
+		
+		phpCAS::traceEnd($auth);
+		return $auth;
+		}
+	
+	/**
+	 * This method is used to redirect the client to the CAS server.
+	 * It is used by CASClient::forceAuthentication() and CASClient::checkAuthentication().
+	 * @param $gateway true to check authentication, false to force it
+	 * @param $renew true to force the authentication with the CAS server
+	 * @public
+	 */
+	function redirectToCas($gateway=false,$renew=false){
+		phpCAS::traceBegin();
+		$cas_url = $this->getServerLoginURL($gateway,$renew);
+		header('Location: '.$cas_url);
+		phpCAS::log( "Redirect to : ".$cas_url );
+		
+		$this->printHTMLHeader($this->getString(CAS_STR_AUTHENTICATION_WANTED));
+		
+		printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
+		$this->printHTMLFooter();
+		phpCAS::traceExit();
+		exit();
+	}
+
+//	/**
+//	 * This method is used to logout from CAS.
+//	 * @param $url a URL that will be transmitted to the CAS server (to come back to when logged out)
+//	 * @public
+//	 */
+//	function logout($url = "") {
+//		phpCAS::traceBegin();
+//		$cas_url = $this->getServerLogoutURL();
+//		// v0.4.14 sebastien.gougeon at univ-rennes1.fr
+//		// header('Location: '.$cas_url);
+//		if ( $url != "" ) {
+//			// Adam Moore 1.0.0RC2
+//			$url = '?service=' . $url . '&url=' . $url;
+//		}
+//		header('Location: '.$cas_url . $url);
+//		session_unset();
+//		session_destroy();
+//		$this->printHTMLHeader($this->getString(CAS_STR_LOGOUT));
+//		printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
+//		$this->printHTMLFooter();
+//		phpCAS::traceExit();
+//		exit();
+//	}
+	
+	/**
+	 * This method is used to logout from CAS.
+	 * @params $params an array that contains the optional url and service parameters that will be passed to the CAS server
+	 * @public
+	 */
+	function logout($params) {
+		phpCAS::traceBegin();
+		$cas_url = $this->getServerLogoutURL();
+		$paramSeparator = '?';
+		if (isset($params['url'])) {
+			$cas_url = $cas_url . $paramSeparator . "url=" . urlencode($params['url']); 
+			$paramSeparator = '&';
+		}
+		if (isset($params['service'])) {
+			$cas_url = $cas_url . $paramSeparator . "service=" . urlencode($params['service']); 
+		}
+		header('Location: '.$cas_url);
+		session_unset();
+		session_destroy();
+		$this->printHTMLHeader($this->getString(CAS_STR_LOGOUT));
+		printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
+		$this->printHTMLFooter();
+		phpCAS::traceExit();
+		exit();
+	}
+	
+	/**
+	 * @return true if the current request is a logout request.
+	 * @private
+	 */
+	function isLogoutRequest() {
+		return !empty($_POST['logoutRequest']);
+	}
+	
+	/**
+	 * @return true if a logout request is allowed.
+	 * @private
+	 */
+	function isLogoutRequestAllowed() {
+	}
+	
+	/**
+	 * This method handles logout requests.
+	 * @param $check_client true to check the client bofore handling the request, 
+	 * false not to perform any access control. True by default.
+	 * @param $allowed_clients an array of host names allowed to send logout requests. 
+	 * By default, only the CAs server (declared in the constructor) will be allowed.
+	 * @public
+	 */
+	function handleLogoutRequests($check_client=true, $allowed_clients=false) {
+		phpCAS::traceBegin();
+		if (!$this->isLogoutRequest()) {
+			phpCAS::log("Not a logout request");
+			phpCAS::traceEnd();
+			return;
+		}
+		phpCAS::log("Logout requested");
+		phpCAS::log("SAML REQUEST: ".$_POST['logoutRequest']);
+		if ($check_client) {
+			if (!$allowed_clients) {
+				$allowed_clients = array( $this->getServerHostname() ); 
+			}
+			$client_ip = $_SERVER['REMOTE_ADDR'];
+			$client = gethostbyaddr($client_ip);
+			phpCAS::log("Client: ".$client);
+			$allowed = false;
+			foreach ($allowed_clients as $allowed_client) {
+				if ($client == $allowed_client) {
+					phpCAS::log("Allowed client '".$allowed_client."' matches, logout request is allowed");
+					$allowed = true;
+					break;
+				} else {
+					phpCAS::log("Allowed client '".$allowed_client."' does not match");
+				}
+			}
+			if (!$allowed) {
+				phpCAS::error("Unauthorized logout request from client '".$client."'");
+			    printf("Unauthorized!");
+				phpCAS::traceExit();
+				exit();
+			}
+		} else {
+			phpCAS::log("No access control set");
+		}
+		// Extract the ticket from the SAML Request
+		preg_match("|<samlp:SessionIndex>(.*)</samlp:SessionIndex>|", $_POST['logoutRequest'], $tick, PREG_OFFSET_CAPTURE, 3);
+		$wrappedSamlSessionIndex = preg_replace('|<samlp:SessionIndex>|','',$tick[0][0]);
+		$ticket2logout = preg_replace('|</samlp:SessionIndex>|','',$wrappedSamlSessionIndex);
+		phpCAS::log("Ticket to logout: ".$ticket2logout);
+		$session_id = preg_replace('/[^\w]/','',$ticket2logout);
+		phpCAS::log("Session id: ".$session_id);
+
+		// fix New session ID
+		session_id($session_id);
+		$_COOKIE[session_name()]=$session_id;
+		$_GET[session_name()]=$session_id;
+		
+		// Overwrite session
+		session_start();	
+		session_unset();
+	    session_destroy();
+	    printf("Disconnected!");
+		phpCAS::traceExit();
+		exit();
+	}
+	
+	/** @} */
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                  BASIC CLIENT FEATURES (CAS 1.0)                   XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	// ########################################################################
+	//  ST
+	// ########################################################################
+	/**
+	 * @addtogroup internalBasic
+	 * @{
+	 */  
+	
+	/**
+	 * the Service Ticket provided in the URL of the request if present
+	 * (empty otherwise). Written by CASClient::CASClient(), read by 
+	 * CASClient::getST() and CASClient::hasPGT().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_st = '';
+	
+	/**
+	 * This method returns the Service Ticket provided in the URL of the request.
+	 * @return The service ticket.
+	 * @private
+	 */
+	function getST()
+		{ return $this->_st; }
+	
+	/**
+	 * This method stores the Service Ticket.
+	 * @param $st The Service Ticket.
+	 * @private
+	 */
+	function setST($st)
+		{ $this->_st = $st; }
+	
+	/**
+	 * This method tells if a Service Ticket was stored.
+	 * @return TRUE if a Service Ticket has been stored.
+	 * @private
+	 */
+	function hasST()
+		{ return !empty($this->_st); }
+	
+	/** @} */
+	
+	// ########################################################################
+	//  ST VALIDATION
+	// ########################################################################
+	/**
+	 * @addtogroup internalBasic
+	 * @{
+	 */  
+	
+	/**
+	 * the certificate of the CAS server.
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_cas_server_cert = '';
+	
+	/**
+	 * the certificate of the CAS server CA.
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_cas_server_ca_cert = '';
+	
+	/**
+	 * Set to true not to validate the CAS server.
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_no_cas_server_validation = false;
+	
+	/**
+	 * Set the certificate of the CAS server.
+	 *
+	 * @param $cert the PEM certificate
+	 */
+	function setCasServerCert($cert)
+		{
+		$this->_cas_server_cert = $cert;
+		}
+	
+	/**
+	 * Set the CA certificate of the CAS server.
+	 *
+	 * @param $cert the PEM certificate of the CA that emited the cert of the server
+	 */
+	function setCasServerCACert($cert)
+		{
+		$this->_cas_server_ca_cert = $cert;
+		}
+	
+	/**
+	 * Set no SSL validation for the CAS server.
+	 */
+	function setNoCasServerValidation()
+		{
+		$this->_no_cas_server_validation = true;
+		}
+	
+	/**
+	 * This method is used to validate a ST; halt on failure, and sets $validate_url,
+	 * $text_reponse and $tree_response on success. These parameters are used later
+	 * by CASClient::validatePGT() for CAS proxies.
+	 * 
+	 * @param $validate_url the URL of the request to the CAS server.
+	 * @param $text_response the response of the CAS server, as is (XML text).
+	 * @param $tree_response the response of the CAS server, as a DOM XML tree.
+	 *
+	 * @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
+	 *
+	 * @private
+	 */
+	function validateST($validate_url,&$text_response,&$tree_response)
+		{
+		phpCAS::traceBegin();
+		// build the URL to validate the ticket
+		$validate_url = $this->getServerServiceValidateURL().'&ticket='.$this->getST();
+		if ( $this->isProxy() ) {
+			// pass the callback url for CAS proxies
+			$validate_url .= '&pgtUrl='.$this->getCallbackURL();
+		}
+		
+		// open and read the URL
+		if ( !$this->readURL($validate_url,''/*cookies*/,$headers,$text_response,$err_msg) ) {
+			phpCAS::trace('could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')');
+			$this->authError('ST not validated',
+				$validate_url,
+				TRUE/*$no_response*/);
+		}
+		
+		// analyze the result depending on the version
+		switch ($this->getServerVersion()) {
+			case CAS_VERSION_1_0:
+				if (preg_match('/^no\n/',$text_response)) {
+					phpCAS::trace('ST has not been validated');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						FALSE/*$bad_response*/,
+						$text_response);
+				}
+				if (!preg_match('/^yes\n/',$text_response)) {
+					phpCAS::trace('ill-formed response');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						TRUE/*$bad_response*/,
+						$text_response);
+				}
+				// ST has been validated, extract the user name
+				$arr = preg_split('/\n/',$text_response);
+				$this->setUser(trim($arr[1]));
+				break;
+			case CAS_VERSION_2_0:
+				// read the response of the CAS server into a DOM object
+				if ( !($dom = domxml_open_mem($text_response))) {
+					phpCAS::trace('domxml_open_mem() failed');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						TRUE/*$bad_response*/,
+						$text_response);
+				}
+				// read the root node of the XML tree
+				if ( !($tree_response = $dom->document_element()) ) {
+					phpCAS::trace('document_element() failed');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						TRUE/*$bad_response*/,
+						$text_response);
+				}
+				// insure that tag name is 'serviceResponse'
+				if ( $tree_response->node_name() != 'serviceResponse' ) {
+					phpCAS::trace('bad XML root node (should be `serviceResponse\' instead of `'.$tree_response->node_name().'\'');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						TRUE/*$bad_response*/,
+						$text_response);
+				}
+				if ( sizeof($success_elements = $tree_response->get_elements_by_tagname("authenticationSuccess")) != 0) {
+					// authentication succeded, extract the user name
+					if ( sizeof($user_elements = $success_elements[0]->get_elements_by_tagname("user")) == 0) {
+						phpCAS::trace('<authenticationSuccess> found, but no <user>');
+						$this->authError('ST not validated',
+							$validate_url,
+							FALSE/*$no_response*/,
+							TRUE/*$bad_response*/,
+							$text_response);
+					}
+					$user = trim($user_elements[0]->get_content());
+					phpCAS::trace('user = `'.$user);
+					$this->setUser($user);
+					
+				} else if ( sizeof($failure_elements = $tree_response->get_elements_by_tagname("authenticationFailure")) != 0) {
+					phpCAS::trace('<authenticationFailure> found');
+					// authentication failed, extract the error code and message
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						FALSE/*$bad_response*/,
+						$text_response,
+						$failure_elements[0]->get_attribute('code')/*$err_code*/,
+						trim($failure_elements[0]->get_content())/*$err_msg*/);
+				} else {
+					phpCAS::trace('neither <authenticationSuccess> nor <authenticationFailure> found');
+					$this->authError('ST not validated',
+						$validate_url,
+						FALSE/*$no_response*/,
+						TRUE/*$bad_response*/,
+						$text_response);
+				}
+				break;
+		}
+		
+		// at this step, ST has been validated and $this->_user has been set,
+		phpCAS::traceEnd(TRUE);
+		return TRUE;
+		}
+	
+	/** @} */
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                     PROXY FEATURES (CAS 2.0)                       XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	// ########################################################################
+	//  PROXYING
+	// ########################################################################
+	/**
+	 * @addtogroup internalProxy
+	 * @{
+	 */
+	
+	/**
+	 * A boolean telling if the client is a CAS proxy or not. Written by CASClient::CASClient(), 
+	 * read by CASClient::isProxy().
+	 *
+	 * @private
+	 */
+	var $_proxy;
+	
+	/**
+	 * Tells if a CAS client is a CAS proxy or not
+	 *
+	 * @return TRUE when the CAS client is a CAs proxy, FALSE otherwise
+	 *
+	 * @private
+	 */
+	function isProxy()
+		{
+		return $this->_proxy;
+		}
+	
+	/** @} */
+	// ########################################################################
+	//  PGT
+	// ########################################################################
+	/**
+	 * @addtogroup internalProxy
+	 * @{
+	 */  
+	
+	/**
+	 * the Proxy Grnting Ticket given by the CAS server (empty otherwise). 
+	 * Written by CASClient::setPGT(), read by CASClient::getPGT() and CASClient::hasPGT().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_pgt = '';
+	
+	/**
+	 * This method returns the Proxy Granting Ticket given by the CAS server.
+	 * @return The Proxy Granting Ticket.
+	 * @private
+	 */
+	function getPGT()
+		{ return $this->_pgt; }
+	
+	/**
+	 * This method stores the Proxy Granting Ticket.
+	 * @param $pgt The Proxy Granting Ticket.
+	 * @private
+	 */
+	function setPGT($pgt)
+		{ $this->_pgt = $pgt; }
+	
+	/**
+	 * This method tells if a Proxy Granting Ticket was stored.
+	 * @return TRUE if a Proxy Granting Ticket has been stored.
+	 * @private
+	 */
+	function hasPGT()
+		{ return !empty($this->_pgt); }
+	
+	/** @} */
+	
+	// ########################################################################
+	//  CALLBACK MODE
+	// ########################################################################
+	/**
+	 * @addtogroup internalCallback
+	 * @{
+	 */  
+	/**
+	 * each PHP script using phpCAS in proxy mode is its own callback to get the
+	 * PGT back from the CAS server. callback_mode is detected by the constructor
+	 * thanks to the GET parameters.
+	 */
+	
+	/**
+	 * a boolean to know if the CAS client is running in callback mode. Written by
+	 * CASClient::setCallBackMode(), read by CASClient::isCallbackMode().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_callback_mode = FALSE;
+	
+	/**
+	 * This method sets/unsets callback mode.
+	 *
+	 * @param $callback_mode TRUE to set callback mode, FALSE otherwise.
+	 *
+	 * @private
+	 */
+	function setCallbackMode($callback_mode)
+		{
+		$this->_callback_mode = $callback_mode;
+		}
+	
+	/**
+	 * This method returns TRUE when the CAs client is running i callback mode, 
+	 * FALSE otherwise.
+	 *
+	 * @return A boolean.
+	 *
+	 * @private
+	 */
+	function isCallbackMode()
+		{
+		return $this->_callback_mode;
+		}
+	
+	/**
+	 * the URL that should be used for the PGT callback (in fact the URL of the 
+	 * current request without any CGI parameter). Written and read by 
+	 * CASClient::getCallbackURL().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_callback_url = '';
+	
+	/**
+	 * This method returns the URL that should be used for the PGT callback (in
+	 * fact the URL of the current request without any CGI parameter, except if
+	 * phpCAS::setFixedCallbackURL() was used).
+	 *
+	 * @return The callback URL
+	 *
+	 * @private
+	 */
+	function getCallbackURL()
+		{
+		// the URL is built when needed only
+		if ( empty($this->_callback_url) ) {
+			$final_uri = '';
+			// remove the ticket if present in the URL
+			$final_uri = 'https://';
+			/* replaced by Julien Marchal - v0.4.6
+			 * $this->uri .= $_SERVER['SERVER_NAME'];
+			 */
+			if(empty($_SERVER['HTTP_X_FORWARDED_SERVER'])){
+				/* replaced by teedog - v0.4.12
+				 * $final_uri .= $_SERVER['SERVER_NAME'];
+				 */
+				if (empty($_SERVER['SERVER_NAME'])) {
+					$final_uri .= $_SERVER['HTTP_HOST'];
+				} else {
+					$final_uri .= $_SERVER['SERVER_NAME'];
+				}
+			} else {
+				$final_uri .= $_SERVER['HTTP_X_FORWARDED_SERVER'];
+			}
+			if ( ($this->isHttps() && $_SERVER['SERVER_PORT']!=443)
+					|| (!$this->isHttps() && $_SERVER['SERVER_PORT']!=80) ) {
+				$final_uri .= ':';
+				$final_uri .= $_SERVER['SERVER_PORT'];
+			}
+			$request_uri = $_SERVER['REQUEST_URI'];
+			$request_uri = preg_replace('/\?.*$/','',$request_uri);
+			$final_uri .= $request_uri;
+			$this->setCallbackURL($final_uri);
+		}
+		return $this->_callback_url;
+		}
+	
+	/**
+	 * This method sets the callback url.
+	 *
+	 * @param $callback_url url to set callback 
+	 *
+	 * @private
+	 */
+	function setCallbackURL($url)
+		{
+		return $this->_callback_url = $url;
+		}
+	
+	/**
+	 * This method is called by CASClient::CASClient() when running in callback
+	 * mode. It stores the PGT and its PGT Iou, prints its output and halts.
+	 *
+	 * @private
+	 */
+	function callback()
+		{
+		phpCAS::traceBegin();
+		$this->printHTMLHeader('phpCAS callback');
+		$pgt_iou = $_GET['pgtIou'];
+		$pgt = $_GET['pgtId'];
+		phpCAS::trace('Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\')');
+		echo '<p>Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\').</p>';
+		$this->storePGT($pgt,$pgt_iou);
+		$this->printHTMLFooter();
+		phpCAS::traceExit();
+		}
+	
+	/** @} */
+	
+	// ########################################################################
+	//  PGT STORAGE
+	// ########################################################################
+	/**
+	 * @addtogroup internalPGTStorage
+	 * @{
+	 */  
+	
+	/**
+	 * an instance of a class inheriting of PGTStorage, used to deal with PGT
+	 * storage. Created by CASClient::setPGTStorageFile() or CASClient::setPGTStorageDB(), used 
+	 * by CASClient::setPGTStorageFile(), CASClient::setPGTStorageDB() and CASClient::initPGTStorage().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_pgt_storage = null;
+	
+	/**
+	 * This method is used to initialize the storage of PGT's.
+	 * Halts on error.
+	 *
+	 * @private
+	 */
+	function initPGTStorage()
+		{
+		// if no SetPGTStorageXxx() has been used, default to file
+		if ( !is_object($this->_pgt_storage) ) {
+			$this->setPGTStorageFile();
+		}
+		
+		// initializes the storage
+		$this->_pgt_storage->init();
+		}
+	
+	/**
+	 * This method stores a PGT. Halts on error.
+	 *
+	 * @param $pgt the PGT to store
+	 * @param $pgt_iou its corresponding Iou
+	 *
+	 * @private
+	 */
+	function storePGT($pgt,$pgt_iou)
+		{
+		// ensure that storage is initialized
+		$this->initPGTStorage();
+		// writes the PGT
+		$this->_pgt_storage->write($pgt,$pgt_iou);
+		}
+	
+	/**
+	 * This method reads a PGT from its Iou and deletes the corresponding storage entry.
+	 *
+	 * @param $pgt_iou the PGT Iou
+	 *
+	 * @return The PGT corresponding to the Iou, FALSE when not found.
+	 *
+	 * @private
+	 */
+	function loadPGT($pgt_iou)
+		{
+		// ensure that storage is initialized
+		$this->initPGTStorage();
+		// read the PGT
+		return $this->_pgt_storage->read($pgt_iou);
+		}
+	
+	/**
+	 * This method is used to tell phpCAS to store the response of the
+	 * CAS server to PGT requests onto the filesystem. 
+	 *
+	 * @param $format the format used to store the PGT's (`plain' and `xml' allowed)
+	 * @param $path the path where the PGT's should be stored
+	 *
+	 * @public
+	 */
+	function setPGTStorageFile($format='',
+		$path='')
+		{
+		// check that the storage has not already been set
+		if ( is_object($this->_pgt_storage) ) {
+			phpCAS::error('PGT storage already defined');
+		}
+		
+		// create the storage object
+		$this->_pgt_storage = &new PGTStorageFile($this,$format,$path);
+		}
+	
+	/**
+	 * This method is used to tell phpCAS to store the response of the
+	 * CAS server to PGT requests into a database. 
+	 * @note The connection to the database is done only when needed. 
+	 * As a consequence, bad parameters are detected only when 
+	 * initializing PGT storage.
+	 *
+	 * @param $user the user to access the data with
+	 * @param $password the user's password
+	 * @param $database_type the type of the database hosting the data
+	 * @param $hostname the server hosting the database
+	 * @param $port the port the server is listening on
+	 * @param $database the name of the database
+	 * @param $table the name of the table storing the data
+	 *
+	 * @public
+	 */
+	function setPGTStorageDB($user,
+							 $password,
+							 $database_type,
+							 $hostname,
+							 $port,
+							 $database,
+							 $table)
+		{
+		// check that the storage has not already been set
+		if ( is_object($this->_pgt_storage) ) {
+			phpCAS::error('PGT storage already defined');
+		}
+		
+		// warn the user that he should use file storage...
+		trigger_error('PGT storage into database is an experimental feature, use at your own risk',E_USER_WARNING);
+		
+		// create the storage object
+		$this->_pgt_storage = & new PGTStorageDB($this,$user,$password,$database_type,$hostname,$port,$database,$table);
+		}
+	
+	// ########################################################################
+	//  PGT VALIDATION
+	// ########################################################################
+	/**
+	 * This method is used to validate a PGT; halt on failure.
+	 * 
+	 * @param $validate_url the URL of the request to the CAS server.
+	 * @param $text_response the response of the CAS server, as is (XML text); result
+	 * of CASClient::validateST() or CASClient::validatePT().
+	 * @param $tree_response the response of the CAS server, as a DOM XML tree; result
+	 * of CASClient::validateST() or CASClient::validatePT().
+	 *
+	 * @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
+	 *
+	 * @private
+	 */
+	function validatePGT(&$validate_url,$text_response,$tree_response)
+		{
+		phpCAS::traceBegin();
+		if ( sizeof($arr = $tree_response->get_elements_by_tagname("proxyGrantingTicket")) == 0) {
+			phpCAS::trace('<proxyGrantingTicket> not found');
+			// authentication succeded, but no PGT Iou was transmitted
+			$this->authError('Ticket validated but no PGT Iou transmitted',
+				$validate_url,
+				FALSE/*$no_response*/,
+				FALSE/*$bad_response*/,
+				$text_response);
+		} else {
+			// PGT Iou transmitted, extract it
+			$pgt_iou = trim($arr[0]->get_content());
+			$pgt = $this->loadPGT($pgt_iou);
+			if ( $pgt == FALSE ) {
+				phpCAS::trace('could not load PGT');
+				$this->authError('PGT Iou was transmitted but PGT could not be retrieved',
+					$validate_url,
+					FALSE/*$no_response*/,
+					FALSE/*$bad_response*/,
+					$text_response);
+			}
+			$this->setPGT($pgt);
+		}
+		phpCAS::traceEnd(TRUE);
+		return TRUE;
+		}
+	
+	// ########################################################################
+	//  PGT VALIDATION
+	// ########################################################################
+	
+	/**
+	 * This method is used to retrieve PT's from the CAS server thanks to a PGT.
+	 * 
+	 * @param $target_service the service to ask for with the PT.
+	 * @param $err_code an error code (PHPCAS_SERVICE_OK on success).
+	 * @param $err_msg an error message (empty on success).
+	 *
+	 * @return a Proxy Ticket, or FALSE on error.
+	 *
+	 * @private
+	 */
+	function retrievePT($target_service,&$err_code,&$err_msg)
+		{
+		phpCAS::traceBegin();
+		
+		// by default, $err_msg is set empty and $pt to TRUE. On error, $pt is
+		// set to false and $err_msg to an error message. At the end, if $pt is FALSE 
+		// and $error_msg is still empty, it is set to 'invalid response' (the most
+		// commonly encountered error).
+		$err_msg = '';
+		
+		// build the URL to retrieve the PT
+		//      $cas_url = $this->getServerProxyURL().'?targetService='.preg_replace('/&/','%26',$target_service).'&pgt='.$this->getPGT();
+		$cas_url = $this->getServerProxyURL().'?targetService='.urlencode($target_service).'&pgt='.$this->getPGT();
+		
+		// open and read the URL
+		if ( !$this->readURL($cas_url,''/*cookies*/,$headers,$cas_response,$err_msg) ) {
+			phpCAS::trace('could not open URL \''.$cas_url.'\' to validate ('.$err_msg.')');
+			$err_code = PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE;
+			$err_msg = 'could not retrieve PT (no response from the CAS server)';
+			phpCAS::traceEnd(FALSE);
+			return FALSE;
+		}
+		
+		$bad_response = FALSE;
+		
+		if ( !$bad_response ) {
+			// read the response of the CAS server into a DOM object
+			if ( !($dom = @domxml_open_mem($cas_response))) {
+				phpCAS::trace('domxml_open_mem() failed');
+				// read failed
+				$bad_response = TRUE;
+			} 
+		}
+		
+		if ( !$bad_response ) {
+			// read the root node of the XML tree
+			if ( !($root = $dom->document_element()) ) {
+				phpCAS::trace('document_element() failed');
+				// read failed
+				$bad_response = TRUE;
+			} 
+		}
+		
+		if ( !$bad_response ) {
+			// insure that tag name is 'serviceResponse'
+			if ( $root->node_name() != 'serviceResponse' ) {
+				phpCAS::trace('node_name() failed');
+				// bad root node
+				$bad_response = TRUE;
+			} 
+		}
+		
+		if ( !$bad_response ) {
+			// look for a proxySuccess tag
+			if ( sizeof($arr = $root->get_elements_by_tagname("proxySuccess")) != 0) {
+				// authentication succeded, look for a proxyTicket tag
+				if ( sizeof($arr = $root->get_elements_by_tagname("proxyTicket")) != 0) {
+					$err_code = PHPCAS_SERVICE_OK;
+					$err_msg = '';
+					phpCAS::trace('original PT: '.trim($arr[0]->get_content()));
+					$pt = trim($arr[0]->get_content());
+					phpCAS::traceEnd($pt);
+					return $pt;
+				} else {
+					phpCAS::trace('<proxySuccess> was found, but not <proxyTicket>');
+				}
+			} 
+			// look for a proxyFailure tag
+			else if ( sizeof($arr = $root->get_elements_by_tagname("proxyFailure")) != 0) {
+				// authentication failed, extract the error
+				$err_code = PHPCAS_SERVICE_PT_FAILURE;
+				$err_msg = 'PT retrieving failed (code=`'
+					.$arr[0]->get_attribute('code')
+					.'\', message=`'
+					.trim($arr[0]->get_content())
+					.'\')';
+				phpCAS::traceEnd(FALSE);
+				return FALSE;
+			} else {
+				phpCAS::trace('neither <proxySuccess> nor <proxyFailure> found');
+			}
+		}
+		
+		// at this step, we are sure that the response of the CAS server was ill-formed
+		$err_code = PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE;
+		$err_msg = 'Invalid response from the CAS server (response=`'.$cas_response.'\')';
+		
+		phpCAS::traceEnd(FALSE);
+		return FALSE;
+		}
+	
+	// ########################################################################
+	// ACCESS TO EXTERNAL SERVICES
+	// ########################################################################
+	
+	/**
+	 * This method is used to acces a remote URL.
+	 *
+	 * @param $url the URL to access.
+	 * @param $cookies an array containing cookies strings such as 'name=val'
+	 * @param $headers an array containing the HTTP header lines of the response
+	 * (an empty array on failure).
+	 * @param $body the body of the response, as a string (empty on failure).
+	 * @param $err_msg an error message, filled on failure.
+	 *
+	 * @return TRUE on success, FALSE otherwise (in this later case, $err_msg
+	 * contains an error message).
+	 *
+	 * @private
+	 */
+	function readURL($url,$cookies,&$headers,&$body,&$err_msg)
+		{
+		phpCAS::traceBegin();
+		$headers = '';
+		$body = '';
+		$err_msg = '';
+		
+		$res = TRUE;
+		
+		// initialize the CURL session
+		$ch = curl_init($url);
+		
+		if (version_compare(PHP_VERSION,'5.1.3','>=')) {
+			//only avaible in php5
+			curl_setopt_array($ch, $this->_curl_options);
+		} else {
+			foreach ($this->_curl_options as $key => $value) {
+				curl_setopt($ch, $key, $value);
+			}
+		}
+
+		if ($this->_cas_server_cert == '' && $this->_cas_server_ca_cert == '' && !$this->_no_cas_server_validation) {
+			phpCAS::error('one of the methods phpCAS::setCasServerCert(), phpCAS::setCasServerCACert() or phpCAS::setNoCasServerValidation() must be called.');
+		}
+		if ($this->_cas_server_cert != '' ) {
+			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
+			curl_setopt($ch, CURLOPT_SSLCERT, $this->_cas_server_cert);
+		} else if ($this->_cas_server_ca_cert != '') {
+			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
+			curl_setopt($ch, CURLOPT_CAINFO, $this->_cas_server_ca_cert);
+		} else {
+			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);
+			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+		}
+		
+		// return the CURL output into a variable
+		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+		// get the HTTP header with a callback
+		$this->_curl_headers = array(); // empty the headers array
+		curl_setopt($ch, CURLOPT_HEADERFUNCTION, array($this, '_curl_read_headers'));
+		// add cookies headers
+		if ( is_array($cookies) ) {
+			curl_setopt($ch,CURLOPT_COOKIE,implode(';',$cookies));
+		}
+		// perform the query
+		$buf = curl_exec ($ch);
+		if ( $buf === FALSE ) {
+			phpCAS::trace('curl_exec() failed');
+			$err_msg = 'CURL error #'.curl_errno($ch).': '.curl_error($ch);
+			// close the CURL session
+			curl_close ($ch);
+			$res = FALSE;
+		} else {
+			// close the CURL session
+			curl_close ($ch);
+			
+			$headers = $this->_curl_headers;
+			$body = $buf;
+		}
+		
+		phpCAS::traceEnd($res);
+		return $res;
+	}
+	
+	/**
+	 * This method is the callback used by readURL method to request HTTP headers.
+	 */
+	var $_curl_headers = array();
+	function _curl_read_headers($ch, $header)
+	{
+		$this->_curl_headers[] = $header;
+		return strlen($header);
+	}
+
+	/**
+	 * This method is used to access an HTTP[S] service.
+	 * 
+	 * @param $url the service to access.
+	 * @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
+	 * success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
+	 * PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
+	 * @param $output the output of the service (also used to give an error
+	 * message on failure).
+	 *
+	 * @return TRUE on success, FALSE otherwise (in this later case, $err_code
+	 * gives the reason why it failed and $output contains an error message).
+	 *
+	 * @public
+	 */
+	function serviceWeb($url,&$err_code,&$output)
+		{
+		phpCAS::traceBegin();
+		// at first retrieve a PT
+		$pt = $this->retrievePT($url,$err_code,$output);
+		
+		$res = TRUE;
+		
+		// test if PT was retrieved correctly
+		if ( !$pt ) {
+			// note: $err_code and $err_msg are filled by CASClient::retrievePT()
+			phpCAS::trace('PT was not retrieved correctly');
+			$res = FALSE;
+		} else {
+			// add cookies if necessary
+			if ( is_array($_SESSION['phpCAS']['services'][$url]['cookies']) ) {
+				foreach ( $_SESSION['phpCAS']['services'][$url]['cookies'] as $name => $val ) { 
+					$cookies[] = $name.'='.$val;
+				}
+			}
+			
+			// build the URL including the PT
+			if ( strstr($url,'?') === FALSE ) {
+				$service_url = $url.'?ticket='.$pt;
+			} else {
+				$service_url = $url.'&ticket='.$pt;
+			}
+			
+			phpCAS::trace('reading URL`'.$service_url.'\'');
+			if ( !$this->readURL($service_url,$cookies,$headers,$output,$err_msg) ) {
+				phpCAS::trace('could not read URL`'.$service_url.'\'');
+				$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
+				// give an error message
+				$output = sprintf($this->getString(CAS_STR_SERVICE_UNAVAILABLE),
+					$service_url,
+					$err_msg);
+				$res = FALSE;
+			} else {
+				// URL has been fetched, extract the cookies
+				phpCAS::trace('URL`'.$service_url.'\' has been read, storing cookies:');
+				foreach ( $headers as $header ) {
+					// test if the header is a cookie
+					if ( preg_match('/^Set-Cookie:/',$header) ) {
+						// the header is a cookie, remove the beginning
+						$header_val = preg_replace('/^Set-Cookie: */','',$header);
+						// extract interesting information
+						$name_val = strtok($header_val,'; ');
+						// extract the name and the value of the cookie
+						$cookie_name = strtok($name_val,'=');
+						$cookie_val = strtok('=');
+						// store the cookie 
+						$_SESSION['phpCAS']['services'][$url]['cookies'][$cookie_name] = $cookie_val;
+						phpCAS::trace($cookie_name.' -> '.$cookie_val);
+					}
+				}
+			}
+		}
+		
+		phpCAS::traceEnd($res);
+		return $res;
+		}
+	
+	/**
+	 * This method is used to access an IMAP/POP3/NNTP service.
+	 * 
+	 * @param $url a string giving the URL of the service, including the mailing box
+	 * for IMAP URLs, as accepted by imap_open().
+	 * @param $flags options given to imap_open().
+	 * @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
+	 * success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
+	 * PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
+	 * @param $err_msg an error message on failure
+	 * @param $pt the Proxy Ticket (PT) retrieved from the CAS server to access the URL
+	 * on success, FALSE on error).
+	 *
+	 * @return an IMAP stream on success, FALSE otherwise (in this later case, $err_code
+	 * gives the reason why it failed and $err_msg contains an error message).
+	 *
+	 * @public
+	 */
+	function serviceMail($url,$flags,&$err_code,&$err_msg,&$pt)
+		{
+		phpCAS::traceBegin();
+		// at first retrieve a PT
+		$pt = $this->retrievePT($target_service,$err_code,$output);
+		
+		$stream = FALSE;
+		
+		// test if PT was retrieved correctly
+		if ( !$pt ) {
+			// note: $err_code and $err_msg are filled by CASClient::retrievePT()
+			phpCAS::trace('PT was not retrieved correctly');
+		} else {
+			phpCAS::trace('opening IMAP URL `'.$url.'\'...');
+			$stream = @imap_open($url,$this->getUser(),$pt,$flags);
+			if ( !$stream ) {
+				phpCAS::trace('could not open URL');
+				$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
+				// give an error message
+				$err_msg = sprintf($this->getString(CAS_STR_SERVICE_UNAVAILABLE),
+					$service_url,
+					var_export(imap_errors(),TRUE));
+				$pt = FALSE;
+				$stream = FALSE;
+			} else {
+				phpCAS::trace('ok');
+			}
+		}
+		
+		phpCAS::traceEnd($stream);
+		return $stream;
+		}
+	
+	/** @} */
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                  PROXIED CLIENT FEATURES (CAS 2.0)                 XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	// ########################################################################
+	//  PT
+	// ########################################################################
+	/**
+	 * @addtogroup internalProxied
+	 * @{
+	 */  
+	
+	/**
+	 * the Proxy Ticket provided in the URL of the request if present
+	 * (empty otherwise). Written by CASClient::CASClient(), read by 
+	 * CASClient::getPT() and CASClient::hasPGT().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_pt = '';
+	
+	/**
+	 * This method returns the Proxy Ticket provided in the URL of the request.
+	 * @return The proxy ticket.
+	 * @private
+	 */
+	function getPT()
+		{
+		//      return 'ST'.substr($this->_pt, 2);
+		return $this->_pt;
+		}
+	
+	/**
+	 * This method stores the Proxy Ticket.
+	 * @param $pt The Proxy Ticket.
+	 * @private
+	 */
+	function setPT($pt)
+		{ $this->_pt = $pt; }
+	
+	/**
+	 * This method tells if a Proxy Ticket was stored.
+	 * @return TRUE if a Proxy Ticket has been stored.
+	 * @private
+	 */
+	function hasPT()
+		{ return !empty($this->_pt); }
+	
+	/** @} */
+	// ########################################################################
+	//  PT VALIDATION
+	// ########################################################################
+	/**
+	 * @addtogroup internalProxied
+	 * @{
+	 */  
+	
+	/**
+	 * This method is used to validate a PT; halt on failure
+	 * 
+	 * @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
+	 *
+	 * @private
+	 */
+	function validatePT(&$validate_url,&$text_response,&$tree_response)
+		{
+		phpCAS::traceBegin();
+		// build the URL to validate the ticket
+		$validate_url = $this->getServerProxyValidateURL().'&ticket='.$this->getPT();
+		
+		if ( $this->isProxy() ) {
+			// pass the callback url for CAS proxies
+			$validate_url .= '&pgtUrl='.$this->getCallbackURL();
+		}
+		
+		// open and read the URL
+		if ( !$this->readURL($validate_url,''/*cookies*/,$headers,$text_response,$err_msg) ) {
+			phpCAS::trace('could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')');
+			$this->authError('PT not validated',
+				$validate_url,
+				TRUE/*$no_response*/);
+		}
+		
+		// read the response of the CAS server into a DOM object
+		if ( !($dom = domxml_open_mem($text_response))) {
+			// read failed
+			$this->authError('PT not validated',
+				$validate_url,
+				FALSE/*$no_response*/,
+				TRUE/*$bad_response*/,
+				$text_response);
+		}
+		// read the root node of the XML tree
+		if ( !($tree_response = $dom->document_element()) ) {
+			// read failed
+			$this->authError('PT not validated',
+				$validate_url,
+				FALSE/*$no_response*/,
+				TRUE/*$bad_response*/,
+				$text_response);
+		}
+		// insure that tag name is 'serviceResponse'
+		if ( $tree_response->node_name() != 'serviceResponse' ) {
+			// bad root node
+			$this->authError('PT not validated',
+				$validate_url,
+				FALSE/*$no_response*/,
+				TRUE/*$bad_response*/,
+				$text_response);
+		}
+		if ( sizeof($arr = $tree_response->get_elements_by_tagname("authenticationSuccess")) != 0) {
+			// authentication succeded, extract the user name
+			if ( sizeof($arr = $tree_response->get_elements_by_tagname("user")) == 0) {
+				// no user specified => error
+				$this->authError('PT not validated',
+					$validate_url,
+					FALSE/*$no_response*/,
+					TRUE/*$bad_response*/,
+					$text_response);
+			}
+			$this->setUser(trim($arr[0]->get_content()));
+			
+		} else if ( sizeof($arr = $tree_response->get_elements_by_tagname("authenticationFailure")) != 0) {
+			// authentication succeded, extract the error code and message
+			$this->authError('PT not validated',
+				$validate_url,
+				FALSE/*$no_response*/,
+				FALSE/*$bad_response*/,
+				$text_response,
+				$arr[0]->get_attribute('code')/*$err_code*/,
+				trim($arr[0]->get_content())/*$err_msg*/);
+		} else {
+			$this->authError('PT not validated',
+				$validate_url,	
+				FALSE/*$no_response*/,
+				TRUE/*$bad_response*/,
+				$text_response);
+		}
+		
+		// at this step, PT has been validated and $this->_user has been set,
+		
+		phpCAS::traceEnd(TRUE);
+		return TRUE;
+		}
+	
+	/** @} */
+	
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	// XX                                                                    XX
+	// XX                               MISC                                 XX
+	// XX                                                                    XX
+	// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+	
+	/**
+	 * @addtogroup internalMisc
+	 * @{
+	 */  
+	
+	// ########################################################################
+	//  URL
+	// ########################################################################
+	/**
+	 * the URL of the current request (without any ticket CGI parameter). Written 
+	 * and read by CASClient::getURL().
+	 *
+	 * @hideinitializer
+	 * @private
+	 */
+	var $_url = '';
+	
+	/**
+	 * This method returns the URL of the current request (without any ticket
+	 * CGI parameter).
+	 *
+	 * @return The URL
+	 *
+	 * @private
+	 */
+	function getURL()
+		{
+		phpCAS::traceBegin();
+		// the URL is built when needed only
+		if ( empty($this->_url) ) {
+			$final_uri = '';
+			// remove the ticket if present in the URL
+			$final_uri = ($this->isHttps()) ? 'https' : 'http';
+			$final_uri .= '://';
+			/* replaced by Julien Marchal - v0.4.6
+			 * $this->_url .= $_SERVER['SERVER_NAME'];
+			 */
+			if(empty($_SERVER['HTTP_X_FORWARDED_SERVER'])){
+				/* replaced by teedog - v0.4.12
+				 * $this->_url .= $_SERVER['SERVER_NAME'];
+				 */
+				if (empty($_SERVER['SERVER_NAME'])) {
+					$server_name = $_SERVER['HTTP_HOST'];
+				} else {
+					$server_name = $_SERVER['SERVER_NAME'];
+				}
+			} else {
+				$server_name = $_SERVER['HTTP_X_FORWARDED_SERVER'];
+			}
+			$final_uri .= $server_name;
+			if (!strpos($server_name, ':')) {
+				if ( ($this->isHttps() && $_SERVER['SERVER_PORT']!=443)
+						|| (!$this->isHttps() && $_SERVER['SERVER_PORT']!=80) ) {
+					$final_uri .= ':';
+					$final_uri .= $_SERVER['SERVER_PORT'];
+				}
+			}
+			
+			$final_uri .= strtok($_SERVER['REQUEST_URI'],"?");
+			$cgi_params = '?'.strtok("?");
+			// remove the ticket if present in the CGI parameters
+			$cgi_params = preg_replace('/&ticket=[^&]*/','',$cgi_params);
+			$cgi_params = preg_replace('/\?ticket=[^&;]*/','?',$cgi_params);
+			$cgi_params = preg_replace('/\?%26/','?',$cgi_params);
+			$cgi_params = preg_replace('/\?&/','?',$cgi_params);
+			$cgi_params = preg_replace('/\?$/','',$cgi_params);
+			$final_uri .= $cgi_params;
+			$this->setURL($final_uri);
+		}
+		phpCAS::traceEnd($this->_url);
+		return $this->_url;
+		}
+	
+	/**
+	 * This method sets the URL of the current request 
+	 *
+	 * @param $url url to set for service
+	 *
+	 * @private
+	 */
+	function setURL($url)
+		{
+		$this->_url = $url;
+		}
+	
+	// ########################################################################
+	//  AUTHENTICATION ERROR HANDLING
+	// ########################################################################
+	/**
+	 * This method is used to print the HTML output when the user was not authenticated.
+	 *
+	 * @param $failure the failure that occured
+	 * @param $cas_url the URL the CAS server was asked for
+	 * @param $no_response the response from the CAS server (other 
+	 * parameters are ignored if TRUE)
+	 * @param $bad_response bad response from the CAS server ($err_code
+	 * and $err_msg ignored if TRUE)
+	 * @param $cas_response the response of the CAS server
+	 * @param $err_code the error code given by the CAS server
+	 * @param $err_msg the error message given by the CAS server
+	 *
+	 * @private
+	 */
+	function authError($failure,$cas_url,$no_response,$bad_response='',$cas_response='',$err_code='',$err_msg='')
+		{
+		phpCAS::traceBegin();
+		
+		$this->printHTMLHeader($this->getString(CAS_STR_AUTHENTICATION_FAILED));
+		printf($this->getString(CAS_STR_YOU_WERE_NOT_AUTHENTICATED),$this->getURL(),$_SERVER['SERVER_ADMIN']);
+		phpCAS::trace('CAS URL: '.$cas_url);
+		phpCAS::trace('Authentication failure: '.$failure);
+		if ( $no_response ) {
+			phpCAS::trace('Reason: no response from the CAS server');
+		} else {
+			if ( $bad_response ) {
+				phpCAS::trace('Reason: bad response from the CAS server');
+			} else {
+				switch ($this->getServerVersion()) {
+					case CAS_VERSION_1_0:
+						phpCAS::trace('Reason: CAS error');
+						break;
+					case CAS_VERSION_2_0:
+						if ( empty($err_code) )
+							phpCAS::trace('Reason: no CAS error');
+						else
+							phpCAS::trace('Reason: ['.$err_code.'] CAS error: '.$err_msg);
+						break;
+				}
+			}
+			phpCAS::trace('CAS response: '.$cas_response);
+		}
+		$this->printHTMLFooter();
+		phpCAS::traceExit();
+		exit();
+		}
+	
+	/** @} */
+}
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/domxml-php4-php5.php b/plugins/CasAuthentication/extlib/CAS/domxml-php4-php5.php
new file mode 100644
index 000000000..d64747514
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/domxml-php4-php5.php
@@ -0,0 +1,277 @@
+<?php
+/**
+ * @file domxml-php4-php5.php
+ * Require PHP5, uses built-in DOM extension.
+ * To be used in PHP4 scripts using DOMXML extension.
+ * Allows PHP4/DOMXML scripts to run on PHP5/DOM.
+ * (Requires PHP5/XSL extension for domxml_xslt functions)
+ *
+ * Typical use:
+ * <pre>
+ * {
+ *  if (version_compare(PHP_VERSION,'5','>='))
+ *   require_once('domxml-php4-to-php5.php');
+ * }
+ * </pre>
+ *
+ * Version 1.5.5, 2005-01-18, http://alexandre.alapetite.net/doc-alex/domxml-php4-php5/
+ *
+ * ------------------------------------------------------------------<br>
+ * Written by Alexandre Alapetite, http://alexandre.alapetite.net/cv/
+ *
+ * Copyright 2004, Licence: Creative Commons "Attribution-ShareAlike 2.0 France" BY-SA (FR),
+ * http://creativecommons.org/licenses/by-sa/2.0/fr/
+ * http://alexandre.alapetite.net/divers/apropos/#by-sa
+ * - Attribution. You must give the original author credit
+ * - Share Alike. If you alter, transform, or build upon this work,
+ *   you may distribute the resulting work only under a license identical to this one
+ * - The French law is authoritative
+ * - Any of these conditions can be waived if you get permission from Alexandre Alapetite
+ * - Please send to Alexandre Alapetite the modifications you make,
+ *   in order to improve this file for the benefit of everybody
+ *
+ * If you want to distribute this code, please do it as a link to:
+ * http://alexandre.alapetite.net/doc-alex/domxml-php4-php5/
+ */
+
+function domxml_new_doc($version) {return new php4DOMDocument('');}
+function domxml_open_file($filename) {return new php4DOMDocument($filename);}
+function domxml_open_mem($str)
+{
+ $dom=new php4DOMDocument('');
+ $dom->myDOMNode->loadXML($str);
+ return $dom;
+}
+function xpath_eval($xpath_context,$eval_str,$contextnode=null) {return $xpath_context->query($eval_str,$contextnode);}
+function xpath_new_context($dom_document) {return new php4DOMXPath($dom_document);}
+
+class php4DOMAttr extends php4DOMNode
+{
+ function php4DOMAttr($aDOMAttr) {$this->myDOMNode=$aDOMAttr;}
+ function Name() {return $this->myDOMNode->name;}
+ function Specified() {return $this->myDOMNode->specified;}
+ function Value() {return $this->myDOMNode->value;}
+}
+
+class php4DOMDocument extends php4DOMNode
+{
+ function php4DOMDocument($filename='')
+ {
+  $this->myDOMNode=new DOMDocument();
+  if ($filename!='') $this->myDOMNode->load($filename);
+ }
+ function create_attribute($name,$value)
+ {
+  $myAttr=$this->myDOMNode->createAttribute($name);
+  $myAttr->value=$value;
+  return new php4DOMAttr($myAttr,$this);
+ }
+ function create_cdata_section($content) {return new php4DOMNode($this->myDOMNode->createCDATASection($content),$this);}
+ function create_comment($data) {return new php4DOMNode($this->myDOMNode->createComment($data),$this);}
+ function create_element($name) {return new php4DOMElement($this->myDOMNode->createElement($name),$this);}
+ function create_text_node($content) {return new php4DOMNode($this->myDOMNode->createTextNode($content),$this);}
+ function document_element() {return new php4DOMElement($this->myDOMNode->documentElement,$this);}
+ function dump_file($filename,$compressionmode=false,$format=false) {return $this->myDOMNode->save($filename);}
+ function dump_mem($format=false,$encoding=false) {return $this->myDOMNode->saveXML();}
+ function get_element_by_id($id) {return new php4DOMElement($this->myDOMNode->getElementById($id),$this);}
+ function get_elements_by_tagname($name)
+ {
+  $myDOMNodeList=$this->myDOMNode->getElementsByTagName($name);
+  $nodeSet=array();
+  $i=0;
+  if (isset($myDOMNodeList))
+   while ($node=$myDOMNodeList->item($i))
+   {
+    $nodeSet[]=new php4DOMElement($node,$this);
+    $i++;
+   }
+  return $nodeSet;
+ }
+ function html_dump_mem() {return $this->myDOMNode->saveHTML();}
+ function root() {return new php4DOMElement($this->myDOMNode->documentElement,$this);}
+}
+
+class php4DOMElement extends php4DOMNode
+{
+ function get_attribute($name) {return $this->myDOMNode->getAttribute($name);}
+ function get_elements_by_tagname($name)
+ {
+  $myDOMNodeList=$this->myDOMNode->getElementsByTagName($name);
+  $nodeSet=array();
+  $i=0;
+  if (isset($myDOMNodeList))
+   while ($node=$myDOMNodeList->item($i))
+   {
+    $nodeSet[]=new php4DOMElement($node,$this->myOwnerDocument);
+    $i++;
+   }
+  return $nodeSet;
+ }
+ function has_attribute($name) {return $this->myDOMNode->hasAttribute($name);}
+ function remove_attribute($name) {return $this->myDOMNode->removeAttribute($name);}
+ function set_attribute($name,$value) {return $this->myDOMNode->setAttribute($name,$value);}
+ function tagname() {return $this->myDOMNode->tagName;}
+}
+
+class php4DOMNode
+{
+ var $myDOMNode;
+ var $myOwnerDocument;
+ function php4DOMNode($aDomNode,$aOwnerDocument)
+ {
+  $this->myDOMNode=$aDomNode;
+  $this->myOwnerDocument=$aOwnerDocument;
+ }
+ function __get($name)
+ {
+  if ($name=='type') return $this->myDOMNode->nodeType;
+  elseif ($name=='tagname') return $this->myDOMNode->tagName;
+  elseif ($name=='content') return $this->myDOMNode->textContent;
+  else
+  {
+   $myErrors=debug_backtrace();
+   trigger_error('Undefined property: '.get_class($this).'::$'.$name.' ['.$myErrors[0]['file'].':'.$myErrors[0]['line'].']',E_USER_NOTICE);
+   return false;
+  }
+ }
+ function append_child($newnode) {return new php4DOMElement($this->myDOMNode->appendChild($newnode->myDOMNode),$this->myOwnerDocument);}
+ function append_sibling($newnode) {return new php4DOMElement($this->myDOMNode->parentNode->appendChild($newnode->myDOMNode),$this->myOwnerDocument);}
+ function attributes()
+ {
+  $myDOMNodeList=$this->myDOMNode->attributes;
+  $nodeSet=array();
+  $i=0;
+  if (isset($myDOMNodeList))
+   while ($node=$myDOMNodeList->item($i))
+   {
+    $nodeSet[]=new php4DOMAttr($node,$this->myOwnerDocument);
+    $i++;
+   }
+  return $nodeSet;
+ }
+ function child_nodes()
+ {
+  $myDOMNodeList=$this->myDOMNode->childNodes;
+  $nodeSet=array();
+  $i=0;
+  if (isset($myDOMNodeList))
+   while ($node=$myDOMNodeList->item($i))
+   {
+    $nodeSet[]=new php4DOMElement($node,$this->myOwnerDocument);
+    $i++;
+   }
+  return $nodeSet;
+ }
+ function children() {return $this->child_nodes();}
+ function clone_node($deep=false) {return new php4DOMElement($this->myDOMNode->cloneNode($deep),$this->myOwnerDocument);}
+ function first_child() {return new php4DOMElement($this->myDOMNode->firstChild,$this->myOwnerDocument);}
+ function get_content() {return $this->myDOMNode->textContent;}
+ function has_attributes() {return $this->myDOMNode->hasAttributes();}
+ function has_child_nodes() {return $this->myDOMNode->hasChildNodes();}
+ function insert_before($newnode,$refnode) {return new php4DOMElement($this->myDOMNode->insertBefore($newnode->myDOMNode,$refnode->myDOMNode),$this->myOwnerDocument);}
+ function is_blank_node()
+ {
+  $myDOMNodeList=$this->myDOMNode->childNodes;
+  $i=0;
+  if (isset($myDOMNodeList))
+   while ($node=$myDOMNodeList->item($i))
+   {
+    if (($node->nodeType==XML_ELEMENT_NODE)||
+        (($node->nodeType==XML_TEXT_NODE)&&!ereg('^([[:cntrl:]]|[[:space:]])*$',$node->nodeValue)))
+     return false;
+    $i++;
+   }
+  return true;
+ }
+ function last_child() {return new php4DOMElement($this->myDOMNode->lastChild,$this->myOwnerDocument);}
+ function new_child($name,$content)
+ {
+  $mySubNode=$this->myDOMNode->ownerDocument->createElement($name);
+  $mySubNode->appendChild($this->myDOMNode->ownerDocument->createTextNode($content));
+  $this->myDOMNode->appendChild($mySubNode);
+  return new php4DOMElement($mySubNode,$this->myOwnerDocument);
+ }
+ function next_sibling() {return new php4DOMElement($this->myDOMNode->nextSibling,$this->myOwnerDocument);}
+ function node_name() {return $this->myDOMNode->localName;}
+ function node_type() {return $this->myDOMNode->nodeType;}
+ function node_value() {return $this->myDOMNode->nodeValue;}
+ function owner_document() {return $this->myOwnerDocument;}
+ function parent_node() {return new php4DOMElement($this->myDOMNode->parentNode,$this->myOwnerDocument);}
+ function prefix() {return $this->myDOMNode->prefix;}
+ function previous_sibling() {return new php4DOMElement($this->myDOMNode->previousSibling,$this->myOwnerDocument);}
+ function remove_child($oldchild) {return new php4DOMElement($this->myDOMNode->removeChild($oldchild->myDOMNode),$this->myOwnerDocument);}
+ function replace_child($oldnode,$newnode) {return new php4DOMElement($this->myDOMNode->replaceChild($oldnode->myDOMNode,$newnode->myDOMNode),$this->myOwnerDocument);}
+ function set_content($text)
+ {
+  if (($this->myDOMNode->hasChildNodes())&&($this->myDOMNode->firstChild->nodeType==XML_TEXT_NODE))
+   $this->myDOMNode->removeChild($this->myDOMNode->firstChild);
+  return $this->myDOMNode->appendChild($this->myDOMNode->ownerDocument->createTextNode($text));
+ }
+}
+
+class php4DOMNodelist
+{
+ var $myDOMNodelist;
+ var $nodeset;
+ function php4DOMNodelist($aDOMNodelist,$aOwnerDocument)
+ {
+  $this->myDOMNodelist=$aDOMNodelist;
+  $this->nodeset=array();
+  $i=0;
+  if (isset($this->myDOMNodelist))
+   while ($node=$this->myDOMNodelist->item($i))
+   {
+    $this->nodeset[]=new php4DOMElement($node,$aOwnerDocument);
+    $i++;
+   }
+ }
+}
+
+class php4DOMXPath
+{
+ var $myDOMXPath;
+ var $myOwnerDocument;
+ function php4DOMXPath($dom_document)
+ {
+  $this->myOwnerDocument=$dom_document;
+  $this->myDOMXPath=new DOMXPath($dom_document->myDOMNode);
+ }
+ function query($eval_str,$contextnode)
+ {
+  if (isset($contextnode)) return new php4DOMNodelist($this->myDOMXPath->query($eval_str,$contextnode->myDOMNode),$this->myOwnerDocument);
+  else return new php4DOMNodelist($this->myDOMXPath->query($eval_str),$this->myOwnerDocument);
+ }
+ function xpath_register_ns($prefix,$namespaceURI) {return $this->myDOMXPath->registerNamespace($prefix,$namespaceURI);}
+}
+
+if (extension_loaded('xsl'))
+{//See also: http://alexandre.alapetite.net/doc-alex/xslt-php4-php5/
+ function domxml_xslt_stylesheet($xslstring) {return new php4DomXsltStylesheet(DOMDocument::loadXML($xslstring));}
+ function domxml_xslt_stylesheet_doc($dom_document) {return new php4DomXsltStylesheet($dom_document);}
+ function domxml_xslt_stylesheet_file($xslfile) {return new php4DomXsltStylesheet(DOMDocument::load($xslfile));}
+ class php4DomXsltStylesheet
+ {
+  var $myxsltProcessor;
+  function php4DomXsltStylesheet($dom_document)
+  {
+   $this->myxsltProcessor=new xsltProcessor();
+   $this->myxsltProcessor->importStyleSheet($dom_document);
+  }
+  function process($dom_document,$xslt_parameters=array(),$param_is_xpath=false)
+  {
+   foreach ($xslt_parameters as $param=>$value)
+    $this->myxsltProcessor->setParameter('',$param,$value);
+   $myphp4DOMDocument=new php4DOMDocument();
+   $myphp4DOMDocument->myDOMNode=$this->myxsltProcessor->transformToDoc($dom_document->myDOMNode);
+   return $myphp4DOMDocument;
+  }
+  function result_dump_file($dom_document,$filename)
+  {
+   $html=$dom_document->myDOMNode->saveHTML();
+   file_put_contents($filename,$html);
+   return $html;
+  }
+  function result_dump_mem($dom_document) {return $dom_document->myDOMNode->saveHTML();}
+ }
+}
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/catalan.php b/plugins/CasAuthentication/extlib/CAS/languages/catalan.php
new file mode 100644
index 000000000..3d67473d9
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/catalan.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/spanish.php
+ * @author Iván-Benjamín García Torà <ivaniclixx AT gmail DOT com>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'usant servidor',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => 'Autentificació CAS necessària!',
+ CAS_STR_LOGOUT 
+ => 'Sortida de CAS necessària!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'Ja hauria d\ haver estat redireccionat al servidor CAS. Feu click <a href="%s">aquí</a> per a continuar.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => 'Autentificació CAS fallida!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>No estàs autentificat.</p><p>Pots tornar a intentar-ho fent click <a href="%s">aquí</a>.</p><p>Si el problema persisteix hauría de contactar amb l\'<a href="mailto:%s">administrador d\'aquest llocc</a>.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => 'El servei `<b>%s</b>\' no està disponible (<b>%s</b>).'
+);
+
+?>
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/english.php b/plugins/CasAuthentication/extlib/CAS/languages/english.php
new file mode 100644
index 000000000..c14345031
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/english.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/english.php
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'using server',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => 'CAS Authentication wanted!',
+ CAS_STR_LOGOUT 
+ => 'CAS logout wanted!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'You should already have been redirected to the CAS server. Click <a href="%s">here</a> to continue.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => 'CAS Authentication failed!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>You were not authenticated.</p><p>You may submit your request again by clicking <a href="%s">here</a>.</p><p>If the problem persists, you may contact <a href="mailto:%s">the administrator of this site</a>.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => 'The service `<b>%s</b>\' is not available (<b>%s</b>).'
+);
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/french.php b/plugins/CasAuthentication/extlib/CAS/languages/french.php
new file mode 100644
index 000000000..675a7fc04
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/french.php
@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * @file languages/english.php
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'utilisant le serveur',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => 'Authentication CAS n�cessaire&nbsp;!',
+ CAS_STR_LOGOUT 
+ => 'D�connexion demand�e&nbsp;!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'Vous auriez du etre redirig�(e) vers le serveur CAS. Cliquez <a href="%s">ici</a> pour continuer.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => 'Authentification CAS infructueuse&nbsp;!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>Vous n\'avez pas �t� authentifi�(e).</p><p>Vous pouvez soumettre votre requete � nouveau en cliquant <a href="%s">ici</a>.</p><p>Si le probl�me persiste, vous pouvez contacter <a href="mailto:%s">l\'administrateur de ce site</a>.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => 'Le service `<b>%s</b>\' est indisponible (<b>%s</b>)'
+
+);
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/german.php b/plugins/CasAuthentication/extlib/CAS/languages/german.php
new file mode 100644
index 000000000..29daeb35d
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/german.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/german.php
+ * @author Henrik Genssen <hg at mediafactory.de>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'via Server',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => 'CAS Authentifizierung erforderlich!',
+ CAS_STR_LOGOUT 
+ => 'CAS Abmeldung!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'eigentlich h&auml;ten Sie zum CAS Server weitergeleitet werden sollen. Dr&uuml;cken Sie <a href="%s">hier</a> um fortzufahren.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => 'CAS Anmeldung fehlgeschlagen!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>Sie wurden nicht angemeldet.</p><p>Um es erneut zu versuchen klicken Sie <a href="%s">hier</a>.</p><p>Wenn das Problem bestehen bleibt, kontkatieren Sie den <a href="mailto:%s">Administrator</a> dieser Seite.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => 'Der Dienst `<b>%s</b>\' ist nicht verf&uuml;gbar (<b>%s</b>).'
+);
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/greek.php b/plugins/CasAuthentication/extlib/CAS/languages/greek.php
new file mode 100644
index 000000000..c17b1d663
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/greek.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/greek.php
+ * @author Vangelis Haniotakis <haniotak at ucnet.uoc.gr>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => '��������������� � ������������',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => '���������� � ����������� CAS!',
+ CAS_STR_LOGOUT 
+ => '���������� � ���������� ��� CAS!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => '�� ������ �� ������ �������������� ���� ����������� CAS. ����� ���� <a href="%s">���</a> ��� �� ����������.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => '� ����������� CAS �������!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>��� ���������������.</p><p>�������� �� ����������������, �������� ���� <a href="%s">���</a>.</p><p>��� �� �������� ���������, ����� �� ����� �� ��� <a href="mailto:%s">�����������</a>.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => '� �������� `<b>%s</b>\' ��� ����� ��������� (<b>%s</b>).'
+);
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/japanese.php b/plugins/CasAuthentication/extlib/CAS/languages/japanese.php
new file mode 100644
index 000000000..333bb17b6
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/japanese.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/japanese.php
+ * @author fnorif (fnorif@yahoo.co.jp)
+ * 
+ * Now Encoding is EUC-JP and LF
+ **/
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'using server',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => 'CAS�ˤ��ǧ�ڤ�Ԥ��ޤ�',
+ CAS_STR_LOGOUT 
+ => 'CAS������������Ȥ��ޤ�!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'CAS�����Ф˹Ԥ�ɬ�פ�����ޤ�����ưŪ��ž������ʤ����� <a href="%s">������</a> �򥯥�å�����³�Ԥ��ޤ���',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => 'CAS�ˤ��ǧ�ڤ˼��Ԥ��ޤ���',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>ǧ�ڤǤ��ޤ���Ǥ���.</p><p>�⤦���٥ꥯ�����Ȥ������������<a href="%s">������</a>�򥯥�å�.</p><p>���꤬��褷�ʤ����� <a href="mailto:%s">���Υ����Ȥδ�����</a>���䤤��碌�Ƥ�������.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => '�����ӥ� `<b>%s</b>\' �����ѤǤ��ޤ��� (<b>%s</b>).'
+);
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/languages.php b/plugins/CasAuthentication/extlib/CAS/languages/languages.php
new file mode 100644
index 000000000..2c6f8bb3b
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/languages.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * @file languages/languages.php
+ * Internationalization constants
+ * @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+//@{
+/**
+ * a phpCAS string index
+ */
+define("CAS_STR_USING_SERVER",                1);
+define("CAS_STR_AUTHENTICATION_WANTED",       2);
+define("CAS_STR_LOGOUT",                      3);
+define("CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED", 4);
+define("CAS_STR_AUTHENTICATION_FAILED",       5);
+define("CAS_STR_YOU_WERE_NOT_AUTHENTICATED",  6);
+define("CAS_STR_SERVICE_UNAVAILABLE",         7);
+//@}
+
+?>
+\ No newline at end of file
diff --git a/plugins/CasAuthentication/extlib/CAS/languages/spanish.php b/plugins/CasAuthentication/extlib/CAS/languages/spanish.php
new file mode 100644
index 000000000..3a8ffc253
--- /dev/null
+++ b/plugins/CasAuthentication/extlib/CAS/languages/spanish.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file languages/spanish.php
+ * @author Iván-Benjamín García Torà <ivaniclixx AT gmail DOT com>
+ * @sa @link internalLang Internationalization @endlink
+ * @ingroup internalLang
+ */
+
+$this->_strings = array(
+ CAS_STR_USING_SERVER 
+ => 'usando servidor',
+ CAS_STR_AUTHENTICATION_WANTED 
+ => '¡Autentificación CAS necesaria!',
+ CAS_STR_LOGOUT 
+ => '¡Salida CAS necesaria!',
+ CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED 
+ => 'Ya debería haber sido redireccionado al servidor CAS. Haga click <a href="%s">aquí</a> para continuar.',
+ CAS_STR_AUTHENTICATION_FAILED 
+ => '¡Autentificación CAS fallida!',
+ CAS_STR_YOU_WERE_NOT_AUTHENTICATED 
+ => '<p>No estás autentificado.</p><p>Puedes volver a intentarlo haciendo click <a href="%s">aquí</a>.</p><p>Si el problema persiste debería contactar con el <a href="mailto:%s">administrador de este sitio</a>.</p>',
+ CAS_STR_SERVICE_UNAVAILABLE
+ => 'El servicio `<b>%s</b>\' no está disponible (<b>%s</b>).'
+);
+
+?>