Ketikkan Coding :

Imports Encryption.Crypto.Secret

Public Class Form1

'Reflects the index of the image Private Enum Images Encrypted = 0 Decrypted = 1 Folder_Open = 2 End Enum

#Region " Events"

#Region " Form Events"

Private Sub Form1_Load(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles MyBase.Load

Me.btnEncrypt.Image = Me.ImageList1.Images(Images.Encrypted) Me.btnDecrypt.Image = Me.ImageList1.Images(Images.Decrypted) Me.btnOpenInput.Image = Me.ImageList1.Images(Images.Folder_Open) Me.btnOpenOutput.Image = Me.ImageList1.Images(Images.Folder_Open)

End Sub

#End Region 'Form Events

#Region " Control Events"

Private Sub Open(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles btnOpenInput.Click

Dim btn As Button = DirectCast(sender, Button)

'The name of the TextBox to return the selected file path to is stored ' in the Tag property of the button. Dim tb As TextBox = _ DirectCast(btn.Parent.Controls(btn.Tag.ToString()), TextBox)

Dim diag As New OpenFileDialog() With diag .CheckFileExists = True .CheckPathExists = True .Multiselect = False .RestoreDirectory = True .Title = "Please select an Input file" .Filter = "All Files (*.*)|*.*"

.ShowDialog()

'Set the file path if one was selected If .FileName.Trim() <> "" Then _ tb.Text = .FileName

End With

diag.Dispose()

End Sub

Private Sub Save(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles btnOpenOutput.Click

Dim btn As Button = DirectCast(sender, Button)

'The name of the TextBox to return the selected file path to is stored ' in the Tag property of the button.

Dim tb As TextBox = _ DirectCast(btn.Parent.Controls(btn.Tag.ToString()), TextBox)

Dim diag As New SaveFileDialog() With diag .AddExtension = True .CheckFileExists = False .CheckPathExists = True .CreatePrompt = False

'Set the extension if there is an input file If My.Computer.FileSystem.FileExists(Me.tbInput.Text.Trim()) = True Then

.DefaultExt = System.IO.Path.GetExtension(Me.tbInput.Text)

'Set the filter to whatever type of file was selected as an input file .Filter = String.Concat(StrConv(.DefaultExt, VbStrConv.ProperCase), _ " Files (*.", .DefaultExt, ")|*.", .DefaultExt, _ "|All Files (*.*)|*.*") Else .Filter &= "All Files (*.*)|*.*" End If

.OverwritePrompt = True .RestoreDirectory = True .Title = "Please enter an output file."

.ShowDialog()

If .FileName.Trim() <> "" Then _ tb.Text = .FileName

End With

diag.Dispose()

End Sub

Private Sub btnEncrypt_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles btnEncrypt.Click

'Get the reference to the button that was clicked Dim clickedButton As Button = DirectCast(sender, Button)

'Call the EncryptDecrypt method and pass to it the Button that was clicked EncryptDecrypt(clickedButton)

MessageBox.Show("Encryption complete!", "Encryption complete", _ MessageBoxButtons.OK, MessageBoxIcon.Information)

End Sub

Private Sub btnDecrypt_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles btnDecrypt.Click

'Get the reference to the button that was clicked Dim clickedButton As Button = DirectCast(sender, Button)

'Call the EncryptDecrypt method and pass to it the Button that was clicked EncryptDecrypt(clickedButton)

MessageBox.Show("Decryption complete!", "Decryption complete", _ MessageBoxButtons.OK, MessageBoxIcon.Information)

End Sub

Private Sub lblWikiLink_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles lblWikiLink.Click

System.Diagnostics.Process.Start(Me.lblWikiLink.Text)

End Sub

Private Sub RadioButton_CheckedChanged(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles rbAes.CheckedChanged, rbTripleDes.CheckedChanged, rbRijndael.CheckedChanged, rbRc2.CheckedChanged, rbDes.CheckedChanged

Dim enc As Encryption.Crypto.Secret._BaseEncryption = _ GetEncryptor()

tbSecretEncryptorDesc.Text = enc.Description

End Sub

#End Region 'Control Events

#End Region 'Events

#Region " Methods"

Private Sub EncryptDecrypt(ByVal clickedButton As Button)

'Create a new instance of the _BaseEncryption class, ' and get the appropriate encryptor class Dim enc As Encryption.Crypto.Secret._BaseEncryption = _ GetEncryptor()

'Encrypt or Decrypt the selected file. ' (This will call the corresponding method in the actual class) If clickedButton.Text = "Encrypt" Then

enc.Encrypt(Me.tbInput.Text.Trim(), Me.tbOutput.Text.Trim())

ElseIf clickedButton.Text = "Decrypt" Then

enc.Decrypt(Me.tbInput.Text.Trim(), Me.tbOutput.Text.Trim())

End If

End Sub

Private Function GetEncryptor() As _BaseEncryption

Dim enc As Encryption.Crypto.Secret._BaseEncryption = Nothing Dim wikiLink As String = String.Empty

'Set the _BaseEncryption class to the class corresponding to the RadioButton ' that was clicked Select Case True Case Me.rbAes.Checked enc = AES.Create() wikiLink = "http://en.wikipedia.org/wiki/Advanced_Encryption_Standard"

Case Me.rbDes.Checked enc = DES.Create() wikiLink = "http://en.wikipedia.org/wiki/Data_Encryption_Standard"

Case Me.rbRc2.Checked enc = Rc2.Create() wikiLink = "http://en.wikipedia.org/wiki/RC2"

Case Me.rbRijndael.Checked enc = Rijndael.Create() wikiLink = "http://en.wikipedia.org/wiki/Rijndael_encryption_algorithm"

Case Me.rbTripleDes.Checked enc = TripleDes.Create() wikiLink = "http://en.wikipedia.org/wiki/Triple_DES"

End Select

Me.lblWikiLink.Text = wikiLink

Return enc

End Function

#End Region 'Methods

End Class