form1.cs

Algorithm Festel. Programs read from file to array byte[]. key block = 64 data block = 128 if use

using System;
using System.Windows.Forms;
using System.IO;

namespace Festel
{
    public partial class Festel : Form
    {
        //================================================================
        // Ten file nhap va xuat
        //================================================================
        public string inName, outName;

        public byte[] buffKey;        


        public Festel()
        {
            InitializeComponent();
        }
        //================================================================
        // Thu hien mo file
        //================================================================
        private void btnOpen_Click(object sender, EventArgs e)
        {
            openFile();
            inName = InFileName.Text;

        }
        //================================================================
        // Ham mo file tu hop thoai  --> tra ve ten file
        //================================================================
        private void openFile()
        {
            openFileDialog.Title = "Open Data File";
            openFileDialog.Filter = "All|*.*";
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                InFileName.Text = openFileDialog.FileName;                
            }

        }


        //================================================================
        //Ma hoa theo tung thuat toan khac nhau,phu thuoc vao lua chon o radioButton

        //================================================================

        private void btnEncode_Click(object sender, EventArgs e)
        {
            int flag=0;
            if (radFestel.Checked == true)
                flag = 0;
            else
            {
                if (radFestel_Type1.Checked == true)
                    flag = 1;
                else
                {
                    if (radFestel_Type2.Checked == true)
                        flag = 2;
                    else
                        if (radFestel_Type3.Checked == true)
                            flag = 3;
                }
            }
            try
            {
                FestelAlg.v = Convert.ToUInt64(toolStripKey.Text);            

                if (InFileName.Text == "")
                {
                    MessageBox.Show("Let's Open file");
                    return;
                }
                if (OutFileName.Text == "")
                {
                    MessageBox.Show("Let's read out put file name");
                }
                inName = InFileName.Text;
                outName = OutFileName.Text;
                ProcessFile.Encode(inName,outName,flag);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        //================================================================
        // Read key from file
        //================================================================
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            ReadKey();

        }
        // Get key random
        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            GetKey();
        }
        //
        public void GetKey()
        {
            Random rd = new Random();
            buffKey = new byte[8];
            rd.NextBytes(buffKey);
            FestelAlg.v = BitConverter.ToUInt64(buffKey, 0);
            toolStripKey.Text = FestelAlg.v.ToString();
            FileStream fs = new FileStream("key.key", FileMode.Create);
            fs.Write(buffKey, 0, 8);
            fs.Close(); 
        }
        //
        public void ReadKey()
        {
            openFileDialog.Title = "Open key File";
            openFileDialog.Filter = "Key File|*.key";
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                string fn = openFileDialog.FileName;
                byte[] buffKey = new byte[8];

                FileStream fs = new FileStream(fn, FileMode.Open);
                fs.Read(buffKey, 0, 8);
                ulong l = BitConverter.ToUInt64(buffKey, 0);
                FestelAlg.v = l;
                toolStripKey.Text = Convert.ToString(l);

            }
        }
        
    }
}