class.ilAuthContainerCAS.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once 'Auth/Container.php';


class ilAuthContainerCAS extends Auth_Container
{


        protected $server_version = null;
        protected $server_hostname = null;
        protected $server_port = null;
        protected $server_uri = null;


    public function __construct()
        {
                parent::__construct();
                $this->initCAS();
    }   

        public function forceAuthentication($username,$status,$auth)
        {
                global $PHPCAS_CLIENT,$ilLog;
                
                if(!$PHPCAS_CLIENT->isAuthenticated())
                {
                        $PHPCAS_CLIENT->forceAuthentication();
                }
        }
        
    public function loginObserver($a_username, $a_auth)
    {
                global $ilias, $rbacadmin, $ilSetting,$ilLog,$PHPCAS_CLIENT;
                
                $ilLog->write(__METHOD__.': Successful CAS login.');

                // Radius with ldap as data source
                include_once './Services/LDAP/classes/class.ilLDAPServer.php';
                if(ilLDAPServer::isDataSourceActive(AUTH_CAS))
                {
                        return $this->handleLDAPDataSource($a_auth,$a_username);
                }
                
                include_once("./Services/CAS/lib/CAS.php");
                if ($PHPCAS_CLIENT->getUser() != "")
                {
                        $username = $PHPCAS_CLIENT->getUser();
                        $ilLog->write(__METHOD__.': Username: '.$username);

                        // Authorize this user
                        include_once('./Services/User/classes/class.ilObjUser.php');
                        $local_user = ilObjUser::_checkExternalAuthAccount("cas", $username);

                        if ($local_user != "")
                        {
                                $a_auth->setAuth($local_user);
                        }
                        else
                        {
                                if (!$ilSetting->get("cas_create_users"))
                                {
                                        $a_auth->status = AUTH_CAS_NO_ILIAS_USER;
                                        $a_auth->logout();
                                        return false;
                                }
                                
                                $userObj = new ilObjUser();
                                
                                $local_user = ilAuthUtils::_generateLogin($username);
                                
                                $newUser["firstname"] = $local_user;
                                $newUser["lastname"] = "";
                                
                                $newUser["login"] = $local_user;
                                
                                // set "plain md5" password (= no valid password)
                                $newUser["passwd"] = ""; 
                                $newUser["passwd_type"] = IL_PASSWD_MD5;
                                                                
                                //$newUser["gender"] = "m";
                                $newUser["auth_mode"] = "cas";
                                $newUser["ext_account"] = $username;
                                $newUser["profile_incomplete"] = 1;
                                
                                // system data
                                $userObj->assignData($newUser);
                                $userObj->setTitle($userObj->getFullname());
                                $userObj->setDescription($userObj->getEmail());
                        
                                // set user language to system language
                                $userObj->setLanguage($ilSetting->get("language"));
                                
                                // Time limit
                                $userObj->setTimeLimitOwner(7);
                                $userObj->setTimeLimitUnlimited(1);
                                $userObj->setTimeLimitFrom(time());
                                $userObj->setTimeLimitUntil(time());
                                                                
                                // Create user in DB
                                $userObj->setOwner(0);
                                $userObj->create();
                                $userObj->setActive(1);
                                
                                $userObj->updateOwner();
                                
                                //insert user data in table user_data
                                $userObj->saveAsNew();
                                
                                // setup user preferences
                                $userObj->writePrefs();
                                
                                // to do: test this
                                $rbacadmin->assignUser($ilSetting->get('cas_user_default_role'), $userObj->getId(),true);
                                unset($userObj);
                                
                                $a_auth->setAuth($local_user);
                                return true;
                        }
                }
                else
                {
                        $ilLog->write(__METHOD__.': Login failed.');

                        // This should never occur unless CAS is not configured properly
                        $a_auth->status = AUTH_WRONG_LOGIN;
                        return false;
                }
                return false;
    }

        protected function handleLDAPDataSource($a_auth,$ext_account)
        {
                include_once './Services/LDAP/classes/class.ilLDAPServer.php';
                $server = ilLDAPServer::getInstanceByServerId(
                        ilLDAPServer::getDataSource(AUTH_CAS)
                );

                $GLOBALS['ilLog']->write(__METHOD__.' Using ldap data source for user: '.$ext_account);

                include_once './Services/LDAP/classes/class.ilLDAPUserSynchronisation.php';
                $sync = new ilLDAPUserSynchronisation('cas', $server->getServerId());
                $sync->setExternalAccount($ext_account);
                $sync->setUserData(array());
                #$sync->forceCreation($this->force_creation);
                // TODO: Check this
                $sync->forceCreation(true);

                try {
                        $internal_account = $sync->sync();
                }
                catch(UnexpectedValueException $e) {
                        $GLOBALS['ilLog']->write(__METHOD__.': Login failed with message: '. $e->getMessage());
                        $a_auth->status = AUTH_WRONG_LOGIN;
                        $a_auth->logout();
                        return false;
                }
                catch(ilLDAPSynchronisationForbiddenException $e) {
                        // No syncronisation allowed => create Error
                        $GLOBALS['ilLog']->write(__METHOD__.': Login failed with message: '. $e->getMessage());
                        $a_auth->status = AUTH_CAS_NO_ILIAS_USER;
                        $a_auth->logout();
                        return false;
                }
                catch(ilLDAPAccountMigrationRequiredException $e) {
                        $GLOBALS['ilLog']->write(__METHOD__.': Starting account migration.');
                        $a_auth->logout();
                        ilUtil::redirect('ilias.php?baseClass=ilStartUpGUI&cmdClass=ilstartupgui&cmd=showAccountMigration');
                }
                $a_auth->setAuth($internal_account);
                return true;
        }

        
        
        public function fetchData($a_username,$a_password,$isChallengeResponse = false)
        {
                global $PHPCAS_CLIENT,$ilLog;
                
                $ilLog->write(__METHOD__.': Fetch Data called');
                return $PHPCAS_CLIENT->isAuthenticated();
        }
        
        protected function initCAS()
        {
                global $ilSetting;
                
                include_once("./Services/CAS/lib/CAS.php");

                $this->server_version = CAS_VERSION_2_0;
                $this->server_hostname = $ilSetting->get('cas_server');
                $this->server_port = (int) $ilSetting->get('cas_port');
                $this->server_uri = (string) $ilSetting->get('cas_uri');
                
                phpCAS::setDebug();
                phpCAS::client(
                        $this->server_version,
                        $this->server_hostname,
                        $this->server_port,
                        $this->server_uri
                );
                phpCAS::setNoCasServerValidation();
        }
        
}
?>