Simple Caesar Cipher in C#
Postingan ini merupakan bagian dari tugas Network Security. Membuat program simpel encrypt dan decrypt Program Caesar Cipher dengan bahasa pemrograman C#
Encrypt
EncryptForm.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void textChiper_TextChanged(object sender, EventArgs e)
{
}
private void btnChiper_Click(object sender, EventArgs e)
{
try{
string _string = textPlain.Text; //input string yang ingindi chiper
string _encode = ""; //penampung string yang sudah di cipher
int num = 0; //inisialisasi variabel utk kolom key sebagai flag chiper
num = int.Parse(textKey.Text); // mengubah atau mengconvert string menjadi menjadi int agar bisad di loop
for (int i = 0; i < _string.Length; i++) //loop dari panjang string
{
_encode += (char)(_string[i] + num); //loop enkripsi string dimana string diloop berdasarkan char ascii ditambah dengan flag sesuai key yang diinput
}
textChiper.Text = _encode; //memasukan hasil ciphertext ke kolom bar ciphertext
}
catch (Exception ex){
MessageBox.Show(ex.Message,"Input Key",MessageBoxButtons.OK,MessageBoxIcon.Error); //trycatch error apabila key tidak dimasukkan
}
}
private void textPlain_TextChanged(object sender, EventArgs e)
{
}
private void textKey_TextChanged(object sender, EventArgs e){}
private void btnCopy_Click(object sender, EventArgs e)
{
try{
Clipboard.SetText(textChiper.Text);
}
catch(Exception ex){
MessageBox.Show(ex.Message,"Input plain text",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
}
}
EncrpytForm.Designer.cs
namespace WindowsFormsApplication1
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.label1 = new System.Windows.Forms.Label();
this.textPlain = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.textChiper = new System.Windows.Forms.TextBox();
this.btnChiper = new System.Windows.Forms.Button();
this.textKey = new System.Windows.Forms.TextBox();
this.label5 = new System.Windows.Forms.Label();
this.label8 = new System.Windows.Forms.Label();
this.btnCopy = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(123, 133);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(0, 13);
this.label1.TabIndex = 0;
//
// textPlain
//
this.textPlain.AccessibleName = "";
this.textPlain.Location = new System.Drawing.Point(74, 12);
this.textPlain.Name = "textPlain";
this.textPlain.Size = new System.Drawing.Size(141, 20);
this.textPlain.TabIndex = 1;
this.textPlain.Text = "Insert plain text";
this.textPlain.TextChanged += new System.EventHandler(this.textPlain_TextChanged);
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(8, 15);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(60, 13);
this.label2.TabIndex = 2;
this.label2.Text = "Plain Text :";
//
// label3
//
this.label3.AutoSize = true;
this.label3.Location = new System.Drawing.Point(1, 67);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(67, 13);
this.label3.TabIndex = 4;
this.label3.Text = "Chiper Text :";
//
// textChiper
//
this.textChiper.Location = new System.Drawing.Point(74, 64);
this.textChiper.Name = "textChiper";
this.textChiper.ReadOnly = true;
this.textChiper.Size = new System.Drawing.Size(141, 20);
this.textChiper.TabIndex = 3;
this.textChiper.TextChanged += new System.EventHandler(this.textChiper_TextChanged);
//
// btnChiper
//
this.btnChiper.AutoSize = true;
this.btnChiper.Location = new System.Drawing.Point(74, 90);
this.btnChiper.Name = "btnChiper";
this.btnChiper.Size = new System.Drawing.Size(75, 23);
this.btnChiper.TabIndex = 5;
this.btnChiper.Text = "Chiper";
this.btnChiper.UseVisualStyleBackColor = true;
this.btnChiper.Click += new System.EventHandler(this.btnChiper_Click);
//
// textKey
//
this.textKey.Location = new System.Drawing.Point(74, 38);
this.textKey.Name = "textKey";
this.textKey.Size = new System.Drawing.Size(141, 20);
this.textKey.TabIndex = 9;
this.textKey.Text = "Insert any number";
this.textKey.TextChanged += new System.EventHandler(this.textKey_TextChanged);
//
// label5
//
this.label5.AutoSize = true;
this.label5.Location = new System.Drawing.Point(37, 41);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(31, 13);
this.label5.TabIndex = 10;
this.label5.Text = "Key :";
//
// label8
//
this.label8.AutoSize = true;
this.label8.Font = new System.Drawing.Font("Futura Bk BT", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label8.Location = new System.Drawing.Point(88, 129);
this.label8.Name = "label8";
this.label8.Size = new System.Drawing.Size(159, 11);
this.label8.TabIndex = 15;
this.label8.Text = "Made for Network Security Assignment";
//
// btnCopy
//
this.btnCopy.AutoSize = true;
this.btnCopy.Location = new System.Drawing.Point(155, 90);
this.btnCopy.Name = "btnCopy";
this.btnCopy.Size = new System.Drawing.Size(60, 23);
this.btnCopy.TabIndex = 16;
this.btnCopy.Text = "Copy";
this.btnCopy.UseVisualStyleBackColor = true;
this.btnCopy.Click += new System.EventHandler(this.btnCopy_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.AutoSize = true;
this.ClientSize = new System.Drawing.Size(259, 149);
this.Controls.Add(this.btnCopy);
this.Controls.Add(this.label8);
this.Controls.Add(this.label5);
this.Controls.Add(this.textKey);
this.Controls.Add(this.btnChiper);
this.Controls.Add(this.label3);
this.Controls.Add(this.textChiper);
this.Controls.Add(this.label2);
this.Controls.Add(this.textPlain);
this.Controls.Add(this.label1);
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.Name = "Form1";
this.Text = "Encrypt | Simple Caesar Cipher";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textPlain;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textChiper;
private System.Windows.Forms.Button btnChiper;
private System.Windows.Forms.TextBox textKey;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label label8;
private System.Windows.Forms.Button btnCopy;
}
}
ProgramEncrypt.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
Decrypt
DecryptForm.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void textChiper_TextChanged(object sender, EventArgs e)
{
}
private void btnEnchiper_Click(object sender, EventArgs e)
{
try{
string _decodestring = textChiper2.Text; //mengambil data string yang telah dicipher
string _decode = ""; //variabel penampung string yang akan di dekripsi
int number = 0; //key atau flag yang digunakan sebagai secret key untuk mendekripsi cipher text
number = int.Parse(textKey2.Text); //inisialisasi variabel dari key yang akan di loop
for (int i =0; i<_decodestring.Length; i++) //loop dari panjang string sesuai key
{
_decode += (char)(_decodestring[i] - number);//loop dekripsi dengan key flag untuk mendekripsi dikurang dari key flag. apabila terjadi perbedaan dalam key, hasil akan berbeda dengan plaintext yang diinput oleh user
}
textEnchiper.Text = _decode; //memasukkan hasil dekripsi ke kolom decipher text
}
catch(Exception ex){
MessageBox.Show(ex.Message,"Paste chiper text",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
private void textKey_TextChanged(object sender, EventArgs e)
{
}
private void btnPaste_Click(object sender, EventArgs e)
{
textChiper2.Text = Clipboard.GetText();
}
}
}
DecryptForm.Designer.cs
namespace WindowsFormsApplication1
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.label1 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.textEnchiper = new System.Windows.Forms.TextBox();
this.btnEnchiper = new System.Windows.Forms.Button();
this.label6 = new System.Windows.Forms.Label();
this.textKey2 = new System.Windows.Forms.TextBox();
this.label7 = new System.Windows.Forms.Label();
this.textChiper2 = new System.Windows.Forms.TextBox();
this.label8 = new System.Windows.Forms.Label();
this.btnPaste = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(123, 133);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(0, 13);
this.label1.TabIndex = 0;
//
// label4
//
this.label4.AutoSize = true;
this.label4.Location = new System.Drawing.Point(6, 67);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(80, 13);
this.label4.TabIndex = 7;
this.label4.Text = "Dechiper Text :";
//
// textEnchiper
//
this.textEnchiper.Location = new System.Drawing.Point(91, 64);
this.textEnchiper.Name = "textEnchiper";
this.textEnchiper.ReadOnly = true;
this.textEnchiper.Size = new System.Drawing.Size(141, 20);
this.textEnchiper.TabIndex = 6;
//
// btnEnchiper
//
this.btnEnchiper.Location = new System.Drawing.Point(157, 90);
this.btnEnchiper.Name = "btnEnchiper";
this.btnEnchiper.Size = new System.Drawing.Size(75, 23);
this.btnEnchiper.TabIndex = 8;
this.btnEnchiper.Text = "Dechiper";
this.btnEnchiper.UseVisualStyleBackColor = true;
this.btnEnchiper.Click += new System.EventHandler(this.btnEnchiper_Click);
//
// label6
//
this.label6.AutoSize = true;
this.label6.Location = new System.Drawing.Point(54, 41);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(31, 13);
this.label6.TabIndex = 12;
this.label6.Text = "Key :";
//
// textKey2
//
this.textKey2.Location = new System.Drawing.Point(91, 38);
this.textKey2.Name = "textKey2";
this.textKey2.Size = new System.Drawing.Size(141, 20);
this.textKey2.TabIndex = 11;
this.textKey2.Text = "Insert number above";
//
// label7
//
this.label7.AutoSize = true;
this.label7.Location = new System.Drawing.Point(18, 15);
this.label7.Name = "label7";
this.label7.Size = new System.Drawing.Size(67, 13);
this.label7.TabIndex = 14;
this.label7.Text = "Chiper Text :";
//
// textChiper2
//
this.textChiper2.Location = new System.Drawing.Point(91, 12);
this.textChiper2.Name = "textChiper2";
this.textChiper2.Size = new System.Drawing.Size(141, 20);
this.textChiper2.TabIndex = 13;
//
// label8
//
this.label8.AutoSize = true;
this.label8.Font = new System.Drawing.Font("Futura Bk BT", 6.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label8.Location = new System.Drawing.Point(89, 133);
this.label8.Name = "label8";
this.label8.Size = new System.Drawing.Size(159, 11);
this.label8.TabIndex = 15;
this.label8.Text = "Made for Network Security Assignment";
//
// btnPaste
//
this.btnPaste.Location = new System.Drawing.Point(91, 90);
this.btnPaste.Name = "btnPaste";
this.btnPaste.Size = new System.Drawing.Size(59, 23);
this.btnPaste.TabIndex = 16;
this.btnPaste.Text = "Paste";
this.btnPaste.UseVisualStyleBackColor = true;
this.btnPaste.Click += new System.EventHandler(this.btnPaste_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.AutoSize = true;
this.ClientSize = new System.Drawing.Size(259, 149);
this.Controls.Add(this.btnPaste);
this.Controls.Add(this.label8);
this.Controls.Add(this.label7);
this.Controls.Add(this.textChiper2);
this.Controls.Add(this.label6);
this.Controls.Add(this.textKey2);
this.Controls.Add(this.btnEnchiper);
this.Controls.Add(this.label4);
this.Controls.Add(this.textEnchiper);
this.Controls.Add(this.label1);
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.Name = "Form1";
this.Text = "Decrypt | Simple Caesar Cipher";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.TextBox textEnchiper;
private System.Windows.Forms.Button btnEnchiper;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.TextBox textKey2;
private System.Windows.Forms.Label label7;
private System.Windows.Forms.TextBox textChiper2;
private System.Windows.Forms.Label label8;
private System.Windows.Forms.Button btnPaste;
}
}
ProgramDecrypt.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
Semoga berguna :)
