<?php
/**
 * 
 * @author  Benjamin Gillissen <hide@address.com>
 * 
 *	**************************************************************

	Copyright (C) 2009  Benjamin Gillissen
	
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	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 General Public License for more details at:
	http://www.gnu.org/copyleft/gpl.html

 *	**************************************************************
 */

class chal_basic extends realm {
	
	private $chal, $ticket;
	
	public function __construct($realm, $chal){
		parent::__construct($realm);
		$this->chal = $chal;
		unset($realm, $chal);
	}
	
	public function get_chaldata(){ return FALSE; }
	
	public function seticket($ticket){
		$this->ticket = $ticket;
	}
	
	public function geticket(){ return $this->getcook(); }
	
	public function precheck($chaldata){ return TRUE; }
		
	public function sendform($err=NULL){
		$this->delcook();
		if ( NULL !== $err ){ 
			die(langs::dico_translate($err, NULL, 'realm')); 
		}
		if ( headers_sent($file, $line)) {
			errors::raise('Basic-HTTP Authentification failure : output already started at '.$file.':'.$line, CORE_LOG_ALERT, 'REALM');
		}
		//if no ssl drop a warning about pass sent clear across network
		$this->setcook($this->ticket);
		header('WWW-Authenticate: Basic realm="'.$this->realm.'"');
    	header('HTTP/1.0 401 Unauthorized');
    	exit;
	}
	
	public function istrying(){
		$bool = ( isset($_SERVER['PHP_AUTH_USER']) AND isset($_SERVER['PHP_AUTH_PW']) );
		$basic = $this->getcook();
		if ( FALSE === $bool ){
			$this->delcook();
			return FALSE;
		}
		return (FALSE !== $basic);
	}
	
	public function authenticate(){
		$this->delcook();
		return $this->authcheck($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW']);
	}
	
	
	
	
	private function setcook($ticket){
		$COOKRef = configs::get('realm', 'realm', Array($this->realm, 'cookname'));
		$basic = cookies::read('basic', $COOKRef);
		$basic[$this->realm] = $ticket;
		cookies::set('basic', $basic, $COOKRef);
	}
	
	private function delcook(){
		$COOKRef = configs::get('realm', 'realm', Array($this->realm, 'cookname'));
		$basic = cookies::read('basic', $COOKRef);
		unset($basic[$this->realm]);
		cookies::set('basic', $basic, $COOKRef);
	}
	
	private function getcook(){
		$COOKRef = configs::get('realm', 'realm', Array($this->realm, 'cookname'));
		$basic = cookies::read('basic', $COOKRef);
		if ( !isset($basic[$this->realm]) ){ return FALSE; }
		return $basic[$this->realm];
	}

}