This applet is nothing. In order to save time. Please see the code!
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Security.Cryptography; using System.IO;
Namespace symmetrical encryption application {///
/// Form1 summary description. ///
Public Class Form1: System.Windows.Forms.form
{
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.Button Button2;
///
/// The required designer variable. private System.Windows.Forms.TextBox textBox3; private System.Windows.Forms.OpenFileDialog openfile; private System.Windows.Forms.Button button3; private System.Windows.Forms.SaveFileDialog savefile; private System.Windows.Forms.Button button4; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.CheckBox checkBox1; // Create instance RijndaelManaged rij = new RijndaelManaged (); // // global variables, labeled Document Extension Private Static String Ext = NULL; // Tag Encryption Successfully Whether Private Static Bool EnResult = FALSE; / / Tag Decryption Success Mark Private Static Bool Deresult = False; ///
Private system.componentmodel.Container Components = NULL;
Public Form1 () {// // Windows Form Designer Support for // InitializeComponent ();
// // Todo: Add any constructor code after INITIALIZEComponent call //}
///
/// Clean all the resources being used. ///
Protected Override Void Dispose (Bool Disposing)
{
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
#Region Windows Form Designer Generated Code ///
/// Designer supports the required method - Do not use the code editor to modify the // / this method. ///
Private vidinitiRizeComponent ()
{
This.TextBox1 = new system.windows.Forms.TextBox ();
THISTBOX2 = new system.windows.forms.textbox (); this.button1 = new system.windows.Forms.Button ();
This.Button2 = new system.windows.Forms.Button ();
This.TextBox3 = new system.windows.Forms.TextBox ();
This.openfile = new system.windows.Forms.openFiledialog ();
This.Button3 = new system.windows.Forms.Button ();
This.savefile = new system.windows.forms.savefiledialog ();
This.button4 = new system.windows.Forms.Button ();
THIS.LABEL1 = New System.windows.Forms.label ();
THIS.LABEL2 = New System.windows.Forms.label ();
This.CheckBox1 = new system.windows.forms.checkbox ();
THIS.SUSPENDLAYOUT ();
//
// textbox1
//
This.TextBox1.Location = new system.drawing.point (88, 96);
THIS.TEXTBOX1.NAME = "TextBox1";
This.TextBox1.size = new system.drawing.size (168, 21);
this.TextBox1.tabindex = 0;
THIS.TEXTBOX1.TEXT = "";
//
// textbox2
//
This.TextBox2.Location = new system.drawing.point (88, 136);
THIS.TEXTBOX2.NAME = "TextBox2";
This.TextBox2.size = new system.drawing.size (168, 21);
this.TextBox2.tabindex = 1;
THIS.TEXTBOX2.TEXT = "";
//
// Button1
//
This.Button1.Location = new system.drawing.point (88, 200);
This.button1.name = "button1";
this.button1.tabindex = 2;
This.button1.text = "Encrypt";
This.Button1.click = new system.eventhandler (this.button1_click);
//
// Button2
//
This.button2.location = new system.drawing.point (192, 200);
This.Button2.name = "button2";
THIS.BUTTON2.TABINDEX = 3;
This.Button2.text = "Decrypt";
This.button2.click = new system.eventhandler (this.button2_click);
//
// TextBox3
//
THIS.TEXTBOX3.HIDESELECTION = false; this.textBox3.Location = new system.drawing.point (88, 48);
This.TextBox3.maxlength = 17;
This.TextBox3.name = "textbox3";
This.TextBox3.passwordChar = '$';
THIS.TEXTBOX3.TABINDEX = 4;
THIS.TEXTBOX3.TEXT = ""
This.TextBox3.TextAlign = system.windows.forms.hor;
//
// Button3
//
This.button3.location = new system.drawing.point (280, 96);
This.button3.name = "button3";
This.button3.size = new system.drawing.size (40, 23);
This.button3.tabindex = 5;
This.Button3.Text = "open";
This.Button3.click = new system.eventhandler (this.button3_click);
//
// Button4
//
This.button4.location = new system.drawing.point (280, 136);
This.button4.name = "button4";
This.button4.size = new system.drawing.size (40, 23);
THIS.BUTTON4.TABINDEX = 6;
this.button4.text = "save";
This.button4.click = new system.eventhandler (this.button4_click);
//
// label1
//
THIS.Label1.Location = new system.drawing.point (88, 24);
THIS.LABEL1.NAME = "label1";
THIS.Label1.size = new system.drawing.size (136, 23);
THIS.Label1.tabindex = 7;
THIS.Label1.Text = "Please enter your password:";
//
// label2
//
THIS.Label2.Location = new system.drawing.point (216, 48);
THIS.LABEL2.NAME = "label2";
THIS.Label2.size = new system.drawing.size (184, 23);
THIS.Label2.tabindex = 8;
THIS.Label2.text = "(Password size 8 to 16 characters)";
//
// checkbox1
//
this.checkbox1.location = new system.drawing.point (88, 168);
this.checkbox1.name = "checkbox1";
This.checkbox1.size = new system.drawing.size (216, 24); this.checkbox1.tabindex = 9;
this.checkbox1.text = "Delete source file";
//
// Form1
//
THIS.AUTOSCALEBASESIZE = New System.drawing.size (6, 14);
This.ClientSize = new system.drawing.size (456, 278);
this.Controls.add (this.checkbox1);
THIS.CONTROLS.ADD (this.label2);
This.Controls.add (this.label1);
This.Controls.add (this.button4);
This.Controls.add (this.button3);
This.Controls.add (this.TextBox3);
This.Controls.add (this.button2);
This.Controls.add (this.button1);
This.Controls.add (this.TextBox2);
This.Controls.add (this.TextBox1);
THIS.NAME = "Form1";
THIS.TEXT = "Form1";
This.ResumeLayout (false);
} #Endregion
///
/// The main entry point for the application. ///
[Stathread]
Static void main ()
{
Application.run (New Form1 ());
}
// button private void button1_Click encrypted file (object sender, System.EventArgs e) {if (textBox1.Text! = Null || textBox2.Text! = Null) encryption (textBox3.Text, textBox1.Text, textBox2.Text) ; if (checkBox1.Checked == true && enresult == true) DeleteFile (textBox1.Text);} // function used for the encryption public void encryption (string textBox, string readfile, string writefile) {try {if (textBox. Length> = 8 && textBox.LENGTH <= 16) // Determine the size of the character of the password {byte [] key = system.text.Encoding.default.getBytes (textbox); byte [] iv = rij.iv; rijndael Crypt = Rijndael.Create (); ICryptoTransform transform = crypt.CreateEncryptor (key, iv); // file written FileStream fswrite = new FileStream (writefile, FileMode.Create); CryptoStream cs = new CryptoStream (fswrite, transform, CryptoStreamMode.Write ); // Open file filestream fsread = new filestream (readfile, filemode.open); intlene; while ((length = fsread.readByte ())! = -1) cs.writebyTe (Byte) Length);
FSRead.close (); cs.close (); fswrite.close (); enResult = true; // successfully encrypted MessageBox.show ("successfully completed encrypted task!");} else {messagebox.show ("password The minimum length is 8 characters, the maximum length is 16 characters! "); Return;}} catch (e.tostring ());}}}}}} // Used to decrypt the function public void Decryption, PUBLIC VOID DECRYPTION (String textBox, string readfile, string writefile) {try {if (TextBox.Length> = 8 && textBox.Length <= 16) {byte [] key = system.text.encoding.default.getbytes (TextBox); byte [ ] iv = rij.IV; Rijndael crypt = Rijndael.Create (); ICryptoTransform transform = crypt.CreateDecryptor (key, iv); // read the encrypted file FileStream fsopen = new FileStream (readfile, FileMode.Open); CryptoStream cs = new CryptoStream (fsopen, transform, CryptoStreamMode.Read); // the results written into the decrypted file FileStream fswrite = new FileStream (writefile, FileMode.OpenOrCreate); int length; while ((length = cs.ReadByte () )! = -1) fswrite.writebyte (Byte) Length);
fswrite.close (); cs.close (); fsopen.close (); deresult = true; // successfully decrypting MessageBox.show ("Successfully completed the decryption task!");} else {messagebox.show ("password The minimum length is 8 characters, the maximum length is 16 characters! "); Return;}} catch (e.tostring ());}} // Decryption file private void button2_click (Object Sender , System.Eventargs e) {decryption (TextBox3.text, textbox1.text); if (checkbox1.checked == true) deletefile (TextBox1.text);} // Used to open the file button private void button3_Click (object sender, System.EventArgs e) {openfile = new OpenFileDialog (); openfile.Filter = "All files (* *.) | * *."; openfile.ShowDialog (); textBox1.Text = openfile.FileName; ext = getfileext (openfile.FileName);} private void button4_Click (object sender, System.EventArgs e) {savefile = new SaveFileDialog (); savefile.Filter = ext "files" "(*." EXT ") | *." ext "| all files (*. *) | *. *"; savefile.showdialog (); textbox2.text = SAV Efile.FileName;} // Get extension of the file Private string getFileExt (string filename) {try {char [] Point = new char [] {'.'}; string [] filename2 = filename.split (point); return Filename2 [1];} Catch}}} // Delete file function public void deletefile (string filename) {Try {file.delete (filename);} catch (Exception E) {MessageBox (E.TOSTRING) ());}}
}
