CControllerServerResponseTo::Sign

public function Sign()
{
	global $APPLICATION;

	if ($this->secret_id === false)
	{
		$dbr_member = CControllerMember::GetByGuid($this->member_id);
		$ar_member = $dbr_member->Fetch();
		if (!$ar_member)
		{
			$e = new CApplicationException("Bad member_id: ".$this->member_id."");
			$APPLICATION->ThrowException($e);
			return false;
		}
		$this->secret_id = $ar_member["SECRET_ID"];
	}

	return parent::Sign();
}