ROXter Code

using System;
using System.IO;
using System.Text;
using winForms = System.Windows.Forms;
namespace ROXter
{
    class functions
    {

        public static long keyer (string key, string subkey)
        {

                long result;
                string prom;

                char[] ff = key.ToCharArray();

                int a = Convert.ToInt32(ff[0]) * Convert.ToInt32(ff[5]);
                int b = Convert.ToInt32(ff[1]) * Convert.ToInt32(ff[4]);
                int c = Convert.ToInt32(ff[2]) * Convert.ToInt32(ff[3]);

                if (subkey != "")
                {
                    prom = Convert.ToString(a) + Convert.ToString(b) + Convert.ToString(c) + Convert.ToString(ff[3]);
                    result = Convert.ToInt64(prom) ^ Convert.ToInt64(subkey);

                    return result;
                }
                else
                {
                    prom = Convert.ToString(a) + Convert.ToString(c) + Convert.ToString(b) + Convert.ToString(ff[3]);
                    result = Convert.ToInt64(prom);

                    return result;
                }
            
        }

        public static string textcrypt(string text, string key, string subkey)
        {
            long kkey = keyer(key, subkey);
            byte[] arr1 = Encoding.Unicode.GetBytes(text);

            byte[] bytes = new byte[arr1.Length];
            for (int i = 0; i < bytes.Length; i++)
            {
                bytes[i] = (byte)(arr1[i] ^ kkey);
            }
            return Encoding.Unicode.GetString(bytes);
        }

        public static void filecrypt(string path, string key, string subkey)
        {
            long kkey = keyer(key, subkey);
            byte[] arr1 = File.ReadAllBytes(path);

            byte[] bytes = new byte[arr1.Length];
            for (int i = 0; i < bytes.Length; i++)
            {
                bytes[i] = (byte)(arr1[i] ^ kkey);
            }

            File.WriteAllBytes(path, bytes);

        }

        public static void foldercrypt(string path, string key, string subkey)
        {
            int a = 0;
            long kkey = keyer(key, subkey);
            string[] ss = Directory.GetFiles(path);
            while (a < ss.Length)
            {
                byte[] arr1 = File.ReadAllBytes(ss[a]);

                byte[] bytes = new byte[arr1.Length];
                for (int i = 0; i < bytes.Length; i++)
                {
                    bytes[i] = (byte)(arr1[i] ^ kkey);
                }
                File.WriteAllBytes(ss[a], bytes);
            }

        }


    }
}