//encryption
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace LabMaster
{
public partial class encryption : Form
{
public encryption()
{
InitializeComponent();
}
int p = 0;
float b;
char t;
private void btns_Click(object sender, EventArgs e)
{
string str = txts.Text.Trim();
string[] s = new string[str.Length];
s = str.Split(' ');
string we = "";
char[] c = new char[str.Length];
for (int k = 0; k < s.Length; k++)
{
string q = s[k];
for (int j = 0; j < q.Length; j++)
{
c = q.ToCharArray();
int a = (int)c[j];
//mathamatical
a = a + 25500;
//assign
if (a % 2 == 0)
a = a + 202;
else
a = a + 200;
//bitwise conversion
if (p == k)
{
b = a / 255;
System.Math.Floor(b);
t = (char)b;
we = we + t.ToString();
a = a % 255;
t = (char)a;
we = we + t.ToString();
}
else
{
we = we + " ";
b = a / 255;
System.Math.Floor(b);
t = (char)b;
we = we + t.ToString();
a = a % 255;
t = (char)a;
we = we + t.ToString();
}
p = k;
}
}
txts.Text = string .Empty ;
txts.Text = we;
FileStream f1 = new FileStream("E:\\LabMaster\\LabMaster\\folders\\a.txt", FileMode.Truncate, FileAccess.Write);
StreamWriter w = new StreamWriter(f1);
w.Write(we);
w.Flush();
w.Close();
f1.Close();
}
}
}
//Decryption
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace LabMaster
{
public partial class decryption : Form
{
int t; int r = 0;
string add,we;
public decryption()
{
InitializeComponent();
StreamReader sr = File.OpenText("E:\\LabMaster\\LabMaster\\folders\\a.txt");
while (sr.Peek() != -1)
{
string ina = sr.ReadLine();
add += ina;
}
char[] c = new char[add.Length];
string[] sre = add.Split(' ');
int o = (sre.Length) ;
for (int j = 0; j < o;j++ )
{
int temp=0;
string sd = sre[j];
c = sd.ToCharArray();
for (int i = 0; i < (c.Length - 1);i++ )
{
temp = 0;
r = 0;
r = (int)c[i];
i = i + 1;
t = (int)c[i];
//bit converction
r = (r * 255) + t;
temp = temp + r;
if (i==1 || i % 2 == 1)
{
r = r - 25500;
if (r % 2 == 0)
{
r = r - 202;
char ew = (char)r;
we = we + ew.ToString();
}
else
{
r = r - 200;
char ew = (char)r;
we = we + ew.ToString();
}
}
}
we = we + " ";
}
txtc.Text = we;
FileStream f1 = new FileStream("E:\\LabMaster\\LabMaster\\folders\\a1.txt", FileMode.Truncate, FileAccess.Write);
StreamWriter w = new StreamWriter(f1);
w.Write(we);
w.Flush();
w.Close();
f1.Close();
}
}
}
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