// Decompiled with JetBrains decompiler
// Type: Level2.Program
// Assembly: Level2, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
// MVID: 8E42502F-4AC8-4897-84C5-FB18B897711E
// Assembly location: D:\Games\Torrents\8d.exe

using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;

namespace Level2
{
  internal class Program
  {
    public static void Main(string[] args)
    {
      if (Program.Authorize())
      {
        Console.WriteLine("Security check complete. Starting application...");
        string tempFileName = Path.GetTempFileName();
        Stream manifestResourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Level2.level3.dll");
        using (FileStream fileStream = new FileStream(tempFileName, FileMode.Create, FileAccess.Write))
        {
          while (manifestResourceStream.Position < manifestResourceStream.Length)
            fileStream.WriteByte(Program.Deobfuscate((byte) manifestResourceStream.ReadByte()));
        }
        IntPtr hModule = Win32.LoadLibrary(tempFileName);
        ((Action) Marshal.GetDelegateForFunctionPointer(Win32.GetProcAddress(hModule, "check"), typeof (Action)))();
        Win32.FreeLibrary(hModule);
        File.Delete(tempFileName);
      }
      else
        Console.WriteLine("Security check failed. Exiting...");
    }

    private static bool Authorize()
    {
      Console.WriteLine("Please, complete security check to run this application.");
      Console.Write("Enter PIN: ");
      long result;
      if (long.TryParse(Console.ReadLine(), out result))
        return result == 15663090876965025L;
      return false;
    }

    private static byte Deobfuscate(byte obfuscated)
    {
      return (byte) ((uint) byte.MaxValue - (uint) obfuscated);
    }
  }
}