Diablo 3 Cipher

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AvalonIO.Algorithms
{
class Diablo3Cipher
{
private int Cipher(byte[] buffer, uint length)
{
ulong iv = 0x2EC9A01B305F92D8;

if (buffer == null)
return -1;

for (int i = 0; i < length; i++)
{
ulong temp = buffer ^ (iv & 0xFF);
buffer = Convert.ToByte(temp & 0xFF);

iv = ((iv ^ buffer) << 56) | (iv >> 8);
}

// success
return 0;
}
}
}

Enjoy and give credit to me if you use.

 

Nah, this games cipher was simple
But yeah the way I reversed it is nice and clean

 

Thanks It was an easy Cipher to Reverse just found it in IDA and reversed it.

 

well first learn C# or secondly just paste it in a .cs class and compile as a .dll and use in what ever language you do, but I didn't give out the encryption, it only decrypts, to encrypt it is same exact code but you need to make it save the byte to use with the IV.