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Metode
1. 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
2. #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.
3. 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
4. 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
5. 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
End Class
'Methods