using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace UEFIFirmwareVariablenAbfragen
{
    class Program
    {
        internal struct UNICODE_STRING
        {
            private const int SIZEOF_WCHAR = 2;
            private ushort Length;
            private ushort MaximumLength;
            private string Buffer;

            public UNICODE_STRING(string sourceString)
            {
                this.Buffer = sourceString;
                this.Length = (ushort)(this.Buffer.Length * 2);
                this.MaximumLength = (ushort)(this.Length + 2);
            }
        }

        [DllImport("ntdll.dll", CharSet = CharSet.Unicode, ExactSpelling = false, SetLastError = true)]
        internal static extern uint NtQuerySystemEnvironmentValueEx(ref UNICODE_STRING VariableName, byte[] VendorGuid, byte[] Value, ref uint ValueLength, out uint Attributes);

        static void Main(string[] args)
        {
            var EFI_GLOBAL_VARIABLE = new Guid("{8BE4DF61-93CA-11D2-AA0D-00E098032B8C}");
            uint num = 0;
            byte[] numArray = new byte[1];
            byte[] numArray1 = new byte[] { 1 };
            UNICODE_STRING uNICODESTRING = new UNICODE_STRING("SecureBoot");
            uint num1 = 1;
            uint num2 = 7;
            num = NtQuerySystemEnvironmentValueEx(ref uNICODESTRING, EFI_GLOBAL_VARIABLE.ToByteArray(), numArray, ref num1, out num2);
            if (num != 0)
            {
                Console.WriteLine("leider nix");
            }
            uNICODESTRING = new UNICODE_STRING("SetupMode");
            num = NtQuerySystemEnvironmentValueEx(ref uNICODESTRING, EFI_GLOBAL_VARIABLE.ToByteArray(), numArray1, ref num1, out num2);
            if (num != 0)
            {
                Console.WriteLine("leider nix 2"); ;
            }
            if (numArray[0] == 1 && numArray1[0] == 1)
            {
                Console.WriteLine("SECURE!") ;
            }

            //// 0x8BE4DF61, 0x000093CA bzw. 0xFFFF93CA, 0x000011D2
            //var EFI_GLOBAL_VARIABLE = new Guid("{8BE4DF61-93CA-11D2-AA0D-00E098032B8C}"); // new Guid(-1947934879, 37834, 4562, 170, 13, 0, 224, 152, 3, 43, 140);
            //uint num = 0;
            //uint num1 = 0;
            //uint num2 = 0;

            //var uNICODESTRING = new UNICODE_STRING("SecureBoot");

            //num1 = NtQuerySystemEnvironmentValueEx(ref uNICODESTRING, EFI_GLOBAL_VARIABLE.ToByteArray(), null, ref num, out num2);
            ////if (num1 != -1073741789)
            ////{
            ////    //throw Exception;
            ////}

            //byte[] numArray = new byte[num];
            //num1 = NtQuerySystemEnvironmentValueEx(ref uNICODESTRING, EFI_GLOBAL_VARIABLE.ToByteArray(), numArray, ref num, out num2);

        }
    }
}