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.

 

awesome job homura

 

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

 

Looks good, great share

 

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

 

How to use 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.