Diablo 3 Encryption

    /// <summary>
    /// Diablo 3 Encryption
    /// Reversed by Vulnavia
    /// Implemented by kill_seth
    /// </summary>
    public class Diablo3_uint64
    {
        /// <summary>
        /// Decrypts diablo 3 encrypted saves.
        /// </summary>
        public static byte[] Decrypt(byte[] data)
        {
            try
            {
                UInt64 Key = 0x2EC9A01B305F92D8;
                for (int i = 0; i < data.Length; i++)
                {
                    data[i] = (byte)((data[i] ^ (Key & 0xFF)) & 0xFF);
                    Key = ((Key ^ data[i]) << 56) | (Key >> 8);
                }
                return data;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// Encrypts diablo 3 decrypted saves.
        /// </summary>
        public static byte[] Encrypt(byte[] data)
        {
            try
            {
                UInt64 Key = 0x2EC9A01B305F92D8;
                for (int i = 0; i < data.Length; i++)
                {
                    byte temp = data[i];
                    data[i] = (byte)((temp ^ (Key & 0xFF)) & 0xFF);
                    Key = ((Key ^ temp) << 56) | (Key >> 8);
                }
                return data;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }