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

namespace dotNetPELoader
{
    unsafe internal class NativeDeclarations
    {
        /// <summary>
        /// Acknowledgement: https://github.com/S3cur3Th1sSh1t/Creds/blob/master/Csharp/PEloader.cs
        /// </summary>

        public static uint MEM_COMMIT = 0x1000;
        public static uint MEM_RESERVE = 0x2000;
        public static uint PAGE_EXECUTE_READWRITE = 0x40;
        public static uint PAGE_READWRITE = 0x04;

        [StructLayout(LayoutKind.Sequential)]
        public unsafe struct IMAGE_BASE_RELOCATION
        {
            public uint VirtualAddress;
            public uint SizeOfBlock;
        }

        [DllImport("kernel32")]
        public static extern IntPtr VirtualAlloc(IntPtr lpStartAddr, uint size, uint flAllocationType, uint flProtect);

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        public static extern IntPtr LoadLibrary(string lpFileName);

        [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)]
        public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern IntPtr GetProcAddress(IntPtr hModule, IntPtr ordinal);

        [DllImport("kernel32")]
        public static extern IntPtr CreateThread(

          IntPtr lpThreadAttributes,
          uint dwStackSize,
          IntPtr lpStartAddress,
          IntPtr param,
          uint dwCreationFlags,
          IntPtr lpThreadId
          );

        [DllImport("kernel32")]
        public static extern UInt32 WaitForSingleObject(

          IntPtr hHandle,
          UInt32 dwMilliseconds
          );

        [StructLayout(LayoutKind.Sequential)]
        public unsafe struct IMAGE_IMPORT_DESCRIPTOR
        {
            public uint OriginalFirstThunk;
            public uint TimeDateStamp;
            public uint ForwarderChain;
            public uint Name;
            public uint FirstThunk;
        }


    }
}