using System;
using System.IO;
using System.Text;
using Conquer_Online_Server.Network.Cryptography;

namespace Conquer_Online_Server.Network.AuthPackets
{
    public class Authentication : Interfaces.IPacket
    {
        public string Username;
        public string Password;
        public string Server;
        public string Mac;

        public Authentication()
        {
        }
        public void Deserialize(byte[] buffer)
        {
            if (buffer.Length == 312)
            {
                ushort length = BitConverter.ToUInt16(buffer, 0);

                if (length == 312)
                {

                    ushort type = BitConverter.ToUInt16(buffer, 2);
                    byte[] temp = new byte[16];
                    if (type == 1542)
                    {
                        MemoryStream MS = new MemoryStream(buffer);
                        BinaryReader BR = new BinaryReader(MS);
                        BR.ReadUInt16();
                        BR.ReadUInt16();
                        Username = Encoding.Default.GetString(BR.ReadBytes(32));
                        Username = Username.Replace("\0", "");
                        BR.ReadBytes(37);
                        byte[] PasswordArray = BR.ReadBytes(32);
                        Password = Encoding.Default.GetString(PasswordArray);
                        LoaderEncryption.Decrypt(PasswordArray);
                        Password = Encoding.Default.GetString(PasswordArray);
                        Password = Password.Replace("\0", "");
                        BR.ReadBytes(31);
                        Server = Encoding.Default.GetString(BR.ReadBytes(16));
                        Server = Server.Replace("\0", "");
                        //Console.WriteLine("password:" + Password);
                        BR.Close();
                        MS.Close();
                    }
                }
            }
        }

        public byte[] ToArray()
        {
            throw new NotImplementedException();
        }
        public void Send(Client.GameState client)
        {
            throw new NotImplementedException();
        }
    }
}

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

namespace Conquer_Online_Server.Network.Cryptography
{
    public class LoaderEncryption
    {
        private static byte[] Key =
{
  3,
  6,
  1,
  3,
  66,
  33,
  77,
  44,
  100,
  221,
  21,
  254,
  234,
  212,
  114,
  141,
  214,
  12,
  56,
  99,
  100,
  7,
  98,
  187,
  190,
  77,
  65,
  55,
  44,
  43,
  21,
  99
}; // idb
        private static byte[] Key2 =
{
  6,
  4,
  1,
  7,
  2,
  33,
  77,
  66,
  65,
  44,
  21,
  254,
  43,
  212,
  90,
  44,
  214,
  12,
  56,
  99,
  67,
  7,
  87,
  99,
  0,
  77,
  43,
  11,
  44,
  22,
  21,
  99
}; // idb

        public static void Encrypt(byte[] arr)
        {
            int length = Key.Length;
            for (int i = 0; i < arr.Length; i++)
            {
                arr[i] ^= Key[i % length];
                arr[i] ^= Key[(i + 1) % length];
            }
        }
        public static void Decrypt(byte[] arr)
        {
            var len = Encoding.Default.GetString(arr).Replace("\0", "").Length;
            for (int i = 0; i < len; ++i)
            {

                arr[i] ^= Key2[88 * i & 0x1F];
                arr[i] ^= Key[32 * i & 0x1C];
            }
        }
    }
}