MultiCore CheckSum.dat Generator

[nevS]

Hi guys,
I was bored and tried the new Parallel feature of .NET on the CheckSum.dat Generator ;) Its pretty fast now, around 2.6s on my Intel i750.

Update: Optimized it a bit

How to use:
1. Copy the main.exe to this Generators Directory, or vice versa.
2. Run the Generator. It will automatically take the main.exe located in the same Directory, and also saves the CheckSum.dat in the same Directory. Note: It will overwrite an existing CheckSum.dat.
3. Use the generated CheckSum.dat for your Server.
4. Enjoy :)

To run this thing, you need .NET Framework 4 installed.

Source(C#):

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Threading.Tasks;

namespace MainChecksumGen
{
    static class Program
    {
        static uint filesize;

        static void Main(string[] args)
        {
            CheckSumFile csf = new CheckSumFile();
            csf.Checksums = new uint[1024];
            byte[] lpFileBuffer;
            int ms = 0;
            try
            {
                using (FileStream fs = new FileStream("main.exe", FileMode.Open))
                {
                    lpFileBuffer = new byte[fs.Length];
                    fs.Read(lpFileBuffer, 0, lpFileBuffer.Length);
                }

                filesize = (uint)lpFileBuffer.Length;
                int start = Environment.TickCount;
                Parallel.For(0, 1024, i =>
                {
                    csf.Checksums[i] = GetChecksum(lpFileBuffer, (ushort)i);
                });

                ms = Environment.TickCount - start;
                using (FileStream ss = File.Create("CheckSum.dat"))
                {
                    ss.Write(Serialize(csf), 0, 4096);
                }
            }
            catch (FileNotFoundException e)
            {
                Console.WriteLine("Couldn't find main.exe. Make sure its in the same directory as the Program");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }

            Console.WriteLine("Completed in {0} ms. Saved to CheckSum.dat.\nPress Any Key to continue...", ms);

            Console.ReadKey();
        }

        static uint GetChecksum(byte[] lpFileBuffer, ushort wChecksumKey)
        {
            uint dwResult = (uint)wChecksumKey << 9;
            for (uint I = 0; I < filesize; I += 4)
            {
                uint dwKey = MakeDword(lpFileBuffer, I);
                switch (((I >> 2) + wChecksumKey) % 3)
                {
                    case 0:
                        dwResult ^= dwKey;
                        break;
                    case 1:
                        dwResult += dwKey;
                        break;
                    case 2:
                        dwResult = dwResult << (int)(dwKey % 11);
                        dwResult ^= dwKey;
                        break;
                }
                dwResult ^= (wChecksumKey + dwResult) >> (int)((I >> 2) % 16 + 3);
            }
            return dwResult;
        }

        public static byte[] Serialize(object Obj)
        {
            int rawsize = Marshal.SizeOf(Obj);
            byte[] rawdata = new byte[rawsize];
            GCHandle handle = GCHandle.Alloc(rawdata, GCHandleType.Pinned);
            Marshal.StructureToPtr(Obj, handle.AddrOfPinnedObject(), false);
            handle.Free();
            return rawdata;
        }

        public static uint MakeDword(byte[] bytes, uint start)
        {
            return (uint)((bytes[start + 3] << 24) | (bytes[start + 2] << 16) | (bytes[start + 1] << 8) | bytes[start]);
        }
    }

    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 4096)]
    struct CheckSumFile
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)]
        internal uint[] Checksums;
    }
}

Compiled .exe attached to this Post.

Credits: Deathway for the C++ Source

EDIT: Attachment didn´t work anymore, and cant attach it again, so i upped it at 1-click-hoster. Sry.
Download Mirrors: http://www.mirrorcreator.com/files/FBEVQGFO/

[MentaL]

[MuIsBest]

Approved

[kissmark69]

how to enable checksum in gameserver?

[diablo71]

put new link for download couse the attachment is not working

[TheUninvited]

wat exactly is that?i listen it couple times but the uses of that i dunno:(

[naja04]

link for download not'work

[nevS]

reupped, Attachment is broken...

[mauka]

Thanks for source, but where i can found C++ source the NET crap is hard to read for me

PS. Parallel feature looks really nice!

[nevS]

Thanks for source, but where i can found C++ source the NET crap is hard to read for me

PS. Parallel feature looks really nice!

i think he posted it in this thread:
http://forum.ragezone.com/f197/deathway-work-445090/
but i think the download link is down now, so i reupped it for u:
http://rapidshare.com/files/428347923/DeathwayWORK.rar

[mauka]

Thanks ^^ i converted it from C# to delphi xD

[pegasus128]

works on older versions?

[nevS]

I dont know how old you mean, but yea season 1~5.3 it works.
current gmo(and maybe also the other new versions) got the gameguard.csr file from which you need to calculate the checksums.

[mauka]

Only small changes.. algo is still same

[nevS]

Updated first post, cleaner code + optimized speed.
On my Intel i5 750 machine it's now a half second faster than the old version.