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<?php
if ( defined( 'MEDIAWIKI' ) ) {
global $wgHooks;
$wgHooks['ArticleSave'][] = 'checkAntiSpamHash';
function hexVal($in)
{
$result = preg_replace('/[^0-9a-fA-F]/', '', $in);
return (empty($result) ? 0 : $result);
}
function checkAntiSpamHash()
{
global $wgAntiSpamHash, $wgAntiSpamTimeout, $wgAntiSpamWait;
$now = time();
if (!empty($_COOKIE['AntiSpamTime']) && !empty($_COOKIE['AntiSpamHash']))
{
$time = intval($_COOKIE['AntiSpamTime']);
$hash = hexVal($_COOKIE['AntiSpamHash']);
if ($hash != sha1($time.$wgAntiSpamHash))
{
return false;
}
if ($now - $time > $wgAntiSpamTimeout)
{
return false;
}
elseif ($now - $time < $wgAntiSpamWait)
{
return false;
}
}
else
{
return false;
}
return true;
}
} # End invocation guard
?>
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