CSocServAuth::CheckUniqueKey

static function CheckUniqueKey($bUnset = true)
{
	$arState = array();

	if(isset($_REQUEST["state"]))
	{
		parse_str($_REQUEST["state"], $arState);

		if(isset($arState['backurl']))
		{
			InitURLParam($arState['backurl']);
		}
	}

	if(!isset($_REQUEST['check_key']) && isset($_REQUEST['backurl']))
	{
		InitURLParam($_REQUEST['backurl']);
	}

	$checkKey = '';
	if(isset($_REQUEST['check_key']))
	{
		$checkKey = $_REQUEST['check_key'];
	}
	elseif(isset($arState['check_key']))
	{
		$checkKey = $arState['check_key'];
	}

	if(!empty($_SESSION["UNIQUE_KEY"]) && $checkKey && ($checkKey === $_SESSION["UNIQUE_KEY"]))
	{
		if($bUnset)
		{
			unset($_SESSION["UNIQUE_KEY"]);
		}

		return true;
	}
	return false;
}