如何在Lua/C#中获取HWID？

using System.Management;

namespace HwidHelper
{
    public class Hwid
    {
        public static string GetHwid()
        {
            string hwid = string.Empty;
            ManagementClass mc = new ManagementClass("Win32_Processor");
            ManagementObjectCollection moc = mc.GetInstances();

            foreach (ManagementObject mo in moc)
            {
                hwid = mo.Properties["ProcessorId"].Value.ToString();
                break;
            }

            return hwid;
        }
    }
}

local ffi = require("ffi")
ffi.cdef[[
    const char* GetHwid();
]]
local HwidHelper = ffi.load("HwidHelper")

function GetHWID()
    local hwid = ffi.string(HwidHelper.GetHwid())
    return hwid
end