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<?php
/*
** $Id$
**
** Relog Internet Tools 3 Library ("ITOOLS3")
**
** it_license.class - Handle software licensing
**
** $Log$
** Revision 1.2 2000/07/13 19:16:29 daenzer
** cosmetic changes
**
** Revision 1.1 2000/07/13 19:10:19 weber
** Added licensing suite
**
*/
/**
* itools (TM) license class
*/
class it_license
{
/* private */
var $host; /* Host requesting license */
var $product; /* Product that we are requesting license for */
var $license; /* Entire encoded license string */
var $licenseurl; /* External URL of license */
var $licensefile; /* Local file name of cached license */
var $internal; /* 1 if data source is internal cache */
var $exp; /* Expiration date */
/**
* Create an it_license object for a product installation
* @param $product Name of the licensed product / project
*/
function it_license($product)
{
$this->host = strtolower(gethostbyaddr(getenv('HTTP_HOST')));
$this->product = $product;
$this->licensefile = '/tmp/'.$this->product.'-'.$this->host.'.license';
$this->licenseurl = 'http://license.relog.ch/license.php?host='.$this->host.'&product='.$this->product;
if ($this->get_license(1)) /* Cached license file exists */
{
$age = time() - filemtime($this->licensefile);
if ($age > 86400) /* Cached file is expired */
{
if (!$this->get_license()) /* Try to get a new license from server */
{
if ($age > 604800) /* Couldn't get a new license for a week */
{
unlink($this->licensefile); /* License finally expired */
unset($this->license);
}
}
}
}
else $this->get_license();
$this->check();
if (!$this->internal)
{
if ($fh = fopen($this->licensefile, "w"))
{
fwrite($fh, $this->license);
fclose($fh);
}
}
}
function get_license($internal=0)
{
$url = $internal ? $this->licensefile : $this->licenseurl;
/* echo "Getting license \"$url\"<br>\n"; */
if ($file = @file($url))
{
$this->license = $file[0];
$this->internal = $internal;
return $url;
}
return 0;
}
function check()
{
$secret="Jm+sd3O5NfvBudDhaf/N24-%C";
list($header, $formatversion, $comment, $code, $md5, $end) = explode('|', $this->license);
if ($header == 'RELOG/ULTRALICENSE3000')
{
if ($formatversion == 1)
{
if (md5($secret.$code.$secret) == base64_decode($md5))
{
list($formatversion, $host, $product, $this->exp) = explode('|', base64_decode($code));
if ($formatversion == 1)
{
if ($host == $this->host)
{
if ($product == $this->product)
{
list($year, $month, $day) = explode('-', $this->exp);
$exp = mktime(0, 0, 0, $month, $day, $year);
$now = time();
if ($exp > $now) /* Valid license */
return;
$error = 'license expired on '.$this->exp;
}
else $error = 'wrong product';
}
else $error = 'wrong host';
}
else $error = 'format2';
}
else $error = 'license not authentic';
}
else $error = 'format';
}
else $error = 'no license';
echo $this->host.": invalid license for product <i>$product</i>, reason: <b>$error</b><br>\n";
exit;
}
function valid_until()
{
return $this->exp;
}
} /* End class it_license */
?>
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