<?php
/**
* Project: Distrubution License Class
* File: example.security.php
*
* Copyright (C) 2005 Oliver Lillie
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @link http://www.buggedcom.co.uk/
* @link http://www.phpclasses.org/browse/package/2298.html
* @author Oliver Lillie, buggedcom <publicmail at buggedcom dot co dot uk>
* @history---------------------------------------------
* see CHANGELOG
*/
# IMPORTANT, THIS DEMO USES THE license.generated.dat FILE THAT IS GENERATED
# BY THE demo.generate.license.php SCRIPT. PLEASE RUN THAT FILE BEOFRE THIS
# this file demonstrates several important security techniques
# that should be employed within your app's license validation
# methods
# 1) -----------------------------------------------------------------------
# you should always encode your applications using such a product as ionocube,
# or source guardian.
# 2) -----------------------------------------------------------------------
# always copy the $_SERVER vars before including any public files (by
# public i mean any files that the client has access to, ie lang files or
# opensource classes). Ideally the license validation script should be carried
# out before any imporation of language files, however i know that is not
# always possible so hence this work around.
$server_array = $_SERVER;
# 3) -----------------------------------------------------------------------
# you should always check that the classes exist, otherwise terminate the script
if(@!file_exists('../shared/class.license.lib.php') || @!is_file('../shared/class.license.lib.php')) die('Missing File > ../shared/class.license.lib.php');
if(@!file_exists('class.license.app.php') || @!is_file('class.license.app.php')) die('Missing File > class.license.app.php');
# import the classes
include_once('../shared/class.license.lib.php');
include_once('class.license.app.php');
# 4) -----------------------------------------------------------------------
# check to see if the classes exist
if(!class_exists('padl') || !class_exists('license_application')) die('Class code missing.');
# initialise the class
$application = new license_application('license.generated.dat', false, true, true, true);
# set the server vars
$application->set_server_vars($server_array);
# validate the license key
$results = $application->validate();
# 5) -----------------------------------------------------------------------
# once the validation has been carried out there should be no need to run
# any other scripts. thus by running make_secure() you are wiping all the
# values from the class and defining a var that terminates the script if
# any important functions are called or a new instance of the class is
# redeclared or inited.
# by setting the param to true you can report any violations of this to your
# licensing server. Note the violations detected are only function accesses
# or redeclarations of the classes, not
$application->make_secure(true);
# inclusion of lang file for outputing errors and other text.
# you should look inside the lang file as it contains some security tests you
# can run to see how make_secure function works, this must always be below
# the make_secure function call, otherwise there are major security
# implications in the strength of your key
include_once('demo.security.lang.php');
# 6) -----------------------------------------------------------------------
# switch through the results of the validation. This is the main one. If you
# don't check the validation results, what is the point of using this class!
switch($results['RESULT'])
{
case 'OK' :
echo $LANG['LICENSE_OK'];
break;
default :
die($LANG['LICENSE_FAILED']);
}
# 5) -----------------------------------------------------------------------
# this is really just a tidyup but is worth it, delete the active padl object
unset($application);
# this would be where you would start including public files in an optimum situation
# include_once('demo.security.lang.php');
?>
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