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//AUTHOR: Ismail JH + Wassem Kassoumeh from Arab International University
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.Threading;
using System.IO;
namespace SDES_Project
{
public partial class MainFrm : Form
{
public MainFrm()
{
InitializeComponent();
label2.Text = "Ready";
}
SDES my_Des;
Random rand = new Random();
private void btn_Enc(object sender, EventArgs e)
{
try
{
if (txt_Enc_Key.Text.Length == 10)
{
my_Des = new SDES(txt_Enc_Key.Text);
Encrypt();
label2.Text = "Encryption succeeded";
}
else
MessageBox.Show("Key length should equal 10.");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
label2.Text = "Encryption failed ! --> ";
label2.Text += "The archive is either in unknown format or damaged";
}
}
private void btn_Dec(object sender, EventArgs e)
{
try
{
if (txt_Dec_Key.Text.Length == 10)
{
my_Des = new SDES(txt_Dec_Key.Text);
Decrypt();
label2.Text = "Decryption succeeded";
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
label2.Text = "Decryption failed ! --> ";
label2.Text += "The archive is either in unknown format or damaged";
}
}
private void btn_Browes1(object sender, EventArgs e)
{
label2.Text = "Ready";
openFileDialog1.Filter = "All Files (*.*)|*.*";
openFileDialog1.FileName = "";
if (this.openFileDialog1.ShowDialog(this) == DialogResult.OK)
{
txt_enc_in.Text = this.openFileDialog1.FileName;
string output = txt_enc_in.Text + ".!#";
int q = 1;
while (File.Exists(output))
{
output = output.Insert(output.IndexOf('.'), q.ToString());
q++;
}
txt_enc_out.Text = output;
}
}
private void btn_Browes2(object sender, EventArgs e)
{
label2.Text = "Ready";
openFileDialog1.Filter = "Encrypted Files (*.!#)|*.!#";
openFileDialog1.FileName = "";
if (this.openFileDialog1.ShowDialog(this) == DialogResult.OK)
{
txt_dec_in.Text = this.openFileDialog1.FileName;
string output = txt_dec_in.Text.Remove(txt_dec_in.Text.IndexOf(".!#"), 3);
int q = 1;
while (File.Exists(output))
{
output = output.Insert(output.IndexOf('.'), q.ToString());
q++;
}
txt_dec_out.Text = output;
}
}
private void tabControl1_TabIndexChanged(object sender, EventArgs e)
{
txt_dec_in.Text = "";
txt_Dec_Key.Text = "";
txt_dec_out.Text = "";
txt_enc_in.Text = "";
txt_Enc_Key.Text = "";
txt_enc_out.Text = "";
label2.Text = "Ready";
}
private void Encrypt()
{
FileStream fs = new FileStream(txt_enc_in.Text, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
FileStream fs2 = new FileStream(txt_enc_out.Text, FileMode.Create);
BinaryWriter bwr = new BinaryWriter(fs2);
int blocksize = 4 * 1024;
int iteration_number;
if (fs.Length < blocksize)
iteration_number = 1;
else if (fs.Length % blocksize == 0)
iteration_number = (int)fs.Length / blocksize;
else
iteration_number = ((int)fs.Length / blocksize) + 1;
while (iteration_number-- > 0)
{
if (iteration_number == 0)
blocksize = (int)fs.Length % blocksize;
byte[] input = br.ReadBytes(blocksize);
byte[] output = new byte[input.Length];
for (int i = 0; i < output.Length; i++)
{
output[i] = my_Des.Encrypt(input[i]);
}
bwr.Write(output);
bwr.Flush();
}
bwr.Close();
fs2.Close();
br.Close();
fs.Close();
}
private void Decrypt()
{
FileStream fs = new FileStream(txt_dec_in.Text, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
FileStream fs2 = new FileStream(txt_dec_out.Text, FileMode.Create);
BinaryWriter bwr = new BinaryWriter(fs2);
int blocksize = 4 * 1024;
int iteration_number;
if (fs.Length < blocksize)
iteration_number = 1;
else if (fs.Length % blocksize == 0)
iteration_number = (int)fs.Length / blocksize;
else
iteration_number = ((int)fs.Length / blocksize) + 1;
while (iteration_number-- > 0)
{
if (iteration_number == 0)
blocksize = (int)fs.Length % blocksize;
byte[] input = br.ReadBytes(blocksize);
byte[] output = new byte[input.Length];
for (int i = 0; i < output.Length; i++)
{
output[i] = my_Des.Decrypt(input[i]);
}
bwr.Write(output);
bwr.Flush();
}
bwr.Close();
fs2.Close();
br.Close();
fs.Close();
}
private void Generate_Key_button_Click(object sender, EventArgs e)
{
int key = rand.Next(0, 1025);
txt_Enc_Key.Text = decimal2binstr(key);
while (txt_Enc_Key.Text.Length < 10)
{
txt_Enc_Key.Text = "0" + txt_Enc_Key.Text;
}
}
public string decimal2binstr(int num)
{
string ret = "";
for (int i = 0; i < 8; i++)
{
if (num % 2 == 1)
ret = "1" + ret;
else
ret = "0" + ret;
num >>= 1;
}
return ret;
}
}
}
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A Cloud Ninja, guarding the cyber world, protecting cloud infrastructure from attackers, network from sniffers, source code from vulnerabilities, emails from spams, APIs from bots, data from leakage, workstations from viruses and accounts from weak authentication.
I speak seven languages, two of which are human languages, with a natural translation talent, not just between computer and human but also between technical and business departments.
My professional career started ten years ago when I got challenged to synchronize two databases in a different geographical location without internet. Since then, I play on black screens for living.
Things got interesting when I helped multiple companies migrating from on-premise to the cloud with different configuration automation and many cloud providers.
It was not too soon until I faced my first security problem caused by cloud flexibility and business needs, and here I am.
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