frmmain.vb

Tutorial for Vb .Net for Encryption/Decryption of data

'Copyright (C) 2002 Microsoft Corporation
'All rights reserved.
'THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER 
'EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF 
'MERCHANTIBILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

'Requires the Trial or Release version of Visual Studio .NET Professional (or greater).

Option Strict On

Imports System.IO
Imports System.Text.Encoding
Imports System.Text.RegularExpressions
Imports System.Security.Cryptography

Public Class frmMain
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

        ' So that we only need to set the title of the application once,
        ' we use the AssemblyInfo class (defined in the AssemblyInfo.vb file)
        ' to read the AssemblyTitle attribute.
        Dim ainfo As New AssemblyInfo()

        Me.Text = ainfo.Title
        Me.mnuAbout.Text = String.Format("&About {0} ...", ainfo.Title)

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents mnuMain As System.Windows.Forms.MainMenu
    Friend WithEvents mnuFile As System.Windows.Forms.MenuItem
    Friend WithEvents mnuExit As System.Windows.Forms.MenuItem
    Friend WithEvents mnuHelp As System.Windows.Forms.MenuItem
    Friend WithEvents mnuAbout As System.Windows.Forms.MenuItem
    Friend WithEvents btnLoad As System.Windows.Forms.Button
    Friend WithEvents optTripleDESAdv As System.Windows.Forms.RadioButton
    Friend WithEvents optRijndaelAdv As System.Windows.Forms.RadioButton
    Friend WithEvents btnCreateKey As System.Windows.Forms.Button
    Friend WithEvents txtPassword As System.Windows.Forms.TextBox
    Friend WithEvents chkAdvanced As System.Windows.Forms.CheckBox
    Friend WithEvents odlgSourceFile As System.Windows.Forms.OpenFileDialog
    Friend WithEvents txtCrypto As System.Windows.Forms.TextBox
    Friend WithEvents btnDecrypt As System.Windows.Forms.Button
    Friend WithEvents btnEncrypt As System.Windows.Forms.Button
    Friend WithEvents lblPassword As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmMain))
        Me.mnuMain = New System.Windows.Forms.MainMenu()
        Me.mnuFile = New System.Windows.Forms.MenuItem()
        Me.mnuExit = New System.Windows.Forms.MenuItem()
        Me.mnuHelp = New System.Windows.Forms.MenuItem()
        Me.mnuAbout = New System.Windows.Forms.MenuItem()
        Me.btnLoad = New System.Windows.Forms.Button()
        Me.btnDecrypt = New System.Windows.Forms.Button()
        Me.btnEncrypt = New System.Windows.Forms.Button()
        Me.txtCrypto = New System.Windows.Forms.TextBox()
        Me.optTripleDESAdv = New System.Windows.Forms.RadioButton()
        Me.optRijndaelAdv = New System.Windows.Forms.RadioButton()
        Me.btnCreateKey = New System.Windows.Forms.Button()
        Me.txtPassword = New System.Windows.Forms.TextBox()
        Me.lblPassword = New System.Windows.Forms.Label()
        Me.chkAdvanced = New System.Windows.Forms.CheckBox()
        Me.odlgSourceFile = New System.Windows.Forms.OpenFileDialog()
        Me.SuspendLayout()
        '
        'mnuMain
        '
        Me.mnuMain.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuFile, Me.mnuHelp})
        Me.mnuMain.RightToLeft = CType(resources.GetObject("mnuMain.RightToLeft"), System.Windows.Forms.RightToLeft)
        '
        'mnuFile
        '
        Me.mnuFile.Enabled = CType(resources.GetObject("mnuFile.Enabled"), Boolean)
        Me.mnuFile.Index = 0
        Me.mnuFile.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuExit})
        Me.mnuFile.Shortcut = CType(resources.GetObject("mnuFile.Shortcut"), System.Windows.Forms.Shortcut)
        Me.mnuFile.ShowShortcut = CType(resources.GetObject("mnuFile.ShowShortcut"), Boolean)
        Me.mnuFile.Text = resources.GetString("mnuFile.Text")
        Me.mnuFile.Visible = CType(resources.GetObject("mnuFile.Visible"), Boolean)
        '
        'mnuExit
        '
        Me.mnuExit.Enabled = CType(resources.GetObject("mnuExit.Enabled"), Boolean)
        Me.mnuExit.Index = 0
        Me.mnuExit.Shortcut = CType(resources.GetObject("mnuExit.Shortcut"), System.Windows.Forms.Shortcut)
        Me.mnuExit.ShowShortcut = CType(resources.GetObject("mnuExit.ShowShortcut"), Boolean)
        Me.mnuExit.Text = resources.GetString("mnuExit.Text")
        Me.mnuExit.Visible = CType(resources.GetObject("mnuExit.Visible"), Boolean)
        '
        'mnuHelp
        '
        Me.mnuHelp.Enabled = CType(resources.GetObject("mnuHelp.Enabled"), Boolean)
        Me.mnuHelp.Index = 1
        Me.mnuHelp.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnuAbout})
        Me.mnuHelp.Shortcut = CType(resources.GetObject("mnuHelp.Shortcut"), System.Windows.Forms.Shortcut)
        Me.mnuHelp.ShowShortcut = CType(resources.GetObject("mnuHelp.ShowShortcut"), Boolean)
        Me.mnuHelp.Text = resources.GetString("mnuHelp.Text")
        Me.mnuHelp.Visible = CType(resources.GetObject("mnuHelp.Visible"), Boolean)
        '
        'mnuAbout
        '
        Me.mnuAbout.Enabled = CType(resources.GetObject("mnuAbout.Enabled"), Boolean)
        Me.mnuAbout.Index = 0
        Me.mnuAbout.Shortcut = CType(resources.GetObject("mnuAbout.Shortcut"), System.Windows.Forms.Shortcut)
        Me.mnuAbout.ShowShortcut = CType(resources.GetObject("mnuAbout.ShowShortcut"), Boolean)
        Me.mnuAbout.Text = resources.GetString("mnuAbout.Text")
        Me.mnuAbout.Visible = CType(resources.GetObject("mnuAbout.Visible"), Boolean)
        '
        'btnLoad
        '
        Me.btnLoad.AccessibleDescription = resources.GetString("btnLoad.AccessibleDescription")
        Me.btnLoad.AccessibleName = resources.GetString("btnLoad.AccessibleName")
        Me.btnLoad.Anchor = CType(resources.GetObject("btnLoad.Anchor"), System.Windows.Forms.AnchorStyles)
        Me.btnLoad.BackgroundImage = CType(resources.GetObject("btnLoad.BackgroundImage"), System.Drawing.Image)
        Me.btnLoad.Dock = CType(resources.GetObject("btnLoad.Dock"), System.Windows.Forms.DockStyle)
        Me.btnLoad.Enabled = CType(resources.GetObject("btnLoad.Enabled"), Boolean)
        Me.btnLoad.FlatStyle = CType(resources.GetObject("btnLoad.FlatStyle"), System.Windows.Forms.FlatStyle)
        Me.btnLoad.Font = CType(resources.GetObject("btnLoad.Font"), System.Drawing.Font)
        Me.btnLoad.Image = CType(resources.GetObject("btnLoad.Image"), System.Drawing.Image)
        Me.btnLoad.ImageAlign = CType(resources.GetObject("btnLoad.ImageAlign"), System.Drawing.ContentAlignment)
        Me.btnLoad.ImageIndex = CType(resources.GetObject("btnLoad.ImageIndex"), Integer)
        Me.btnLoad.ImeMode = CType(resources.GetObject("btnLoad.ImeMode"), System.Windows.Forms.ImeMode)
        Me.btnLoad.Location = CType(resources.GetObject("btnLoad.Location"), System.Drawing.Point)
        Me.btnLoad.Name = "btnLoad"
        Me.btnLoad.RightToLeft = CType(resources.GetObject("btnLoad.RightToLeft"), System.Windows.Forms.RightToLeft)
        Me.btnLoad.Size = CType(resources.GetObject("btnLoad.Size"), System.Drawing.Size)
        Me.btnLoad.TabIndex = CType(resources.GetObject("btnLoad.TabIndex"), Integer)
        Me.btnLoad.Text = resources.GetString("btnLoad.Text")
        Me.btnLoad.TextAlign = CType(resources.GetObject("btnLoad.TextAlign"), System.Drawing.ContentAlignment)
        Me.btnLoad.Visible = CType(resources.GetObject("btnLoad.Visible"), Boolean)
        '
        'btnDecrypt
        '
        Me.btnDecrypt.AccessibleDescription = resources.GetString("btnDecrypt.AccessibleDescription")
        Me.btnDecrypt.AccessibleName = resources.GetString("btnDecrypt.AccessibleName")
        Me.btnDecrypt.Anchor = CType(resources.GetObject("btnDecrypt.Anchor"), System.Windows.Forms.AnchorStyles)
        Me.btnDecrypt.BackgroundImage = CType(resources.GetObject("btnDecrypt.BackgroundImage"), System.Drawing.Image)
        Me.btnDecrypt.Dock = CType(resources.GetObject("btnDecrypt.Dock"), System.Windows.Forms.DockStyle)
        Me.btnDecrypt.Enabled = CType(resources.GetObject("btnDecrypt.Enabled"), Boolean)
        Me.btnDecrypt.FlatStyle = CType(resources.GetObject("btnDecrypt.FlatStyle"), System.Windows.Forms.FlatStyle)
        Me.btnDecrypt.Font = CType(resources.GetObject("btnDecrypt.Font"), System.Drawing.Font)
        Me.btnDecrypt.Image = CType(resources.GetObject("btnDecrypt.Image"), System.Drawing.Image)
        Me.btnDecrypt.ImageAlign = CType(resources.GetObject("btnDecrypt.ImageAlign"), System.Drawing.ContentAlignment)
        Me.btnDecrypt.ImageIndex = CType(resources.GetObject("btnDecrypt.ImageIndex"), Integer)
        Me.btnDecrypt.ImeMode = CType(resources.GetObject("btnDecrypt.ImeMode"), System.Windows.Forms.ImeMode)
        Me.btnDecrypt.Location = CType(resources.GetObject("btnDecrypt.Location"), System.Drawing.Point)
        Me.btnDecrypt.Name = "btnDecrypt"
        Me.btnDecrypt.RightToLeft = CType(resources.GetObject("btnDecrypt.RightToLeft"), System.Windows.Forms.RightToLeft)
        Me.btnDecrypt.Size = CType(resources.GetObject("btnDecrypt.Size"), System.Drawing.Size)
        Me.btnDecrypt.TabIndex = CType(resources.GetObject("btnDecrypt.TabIndex"), Integer)
        Me.btnDecrypt.Text = resources.GetString("btnDecrypt.Text")
        Me.btnDecrypt.TextAlign = CType(resources.GetObject("btnDecrypt.TextAlign"), System.Drawing.ContentAlignment)
        Me.btnDecrypt.Visible = CType(resources.GetObject("btnDecrypt.Visible"), Boolean)
        '
        'btnEncrypt
        '
        Me.btnEncrypt.AccessibleDescription = resources.GetString("btnEncrypt.AccessibleDescription")
        Me.btnEncrypt.AccessibleName = resources.GetString("btnEncrypt.AccessibleName")
        Me.btnEncrypt.Anchor = CType(resources.GetObject("btnEncrypt.Anchor"), System.Windows.Forms.AnchorStyles)
        Me.btnEncrypt.BackgroundImage = CType(resources.GetObject("btnEncrypt.BackgroundImage"), System.Drawing.Image)
        Me.btnEncrypt.Dock = CType(resources.GetObject("btnEncrypt.Dock"), System.Windows.Forms.DockStyle)
        Me.btnEncrypt.Enabled = CType(resources.GetObject("btnEncrypt.Enabled"), Boolean)
        Me.btnEncrypt.FlatStyle = CType(resources.GetObject("btnEncrypt.FlatStyle"), System.Windows.Forms.FlatStyle)
        Me.btnEncrypt.Font = CType(resources.GetObject("btnEncrypt.Font"), System.Drawing.Font)
        Me.btnEncrypt.Image = CType(resources.GetObject("btnEncrypt.Image"), System.Drawing.Image)
        Me.btnEncrypt.ImageAlign = CType(resources.GetObject("btnEncrypt.ImageAlign"), System.Drawing.ContentAlignment)
        Me.btnEncrypt.ImageIndex = CType(resources.GetObject("btnEncrypt.ImageIndex"), Integer)
        Me.btnEncrypt.ImeMode = CType(resources.GetObject("btnEncrypt.ImeMode"), System.Windows.Forms.ImeMode)
        Me.btnEncrypt.Location = CType(resources.GetObject("btnEncrypt.Location"), System.Drawing.Point)
        Me.btnEncrypt.Name = "btnEncrypt"
        Me.btnEncrypt.RightToLeft = CType(resources.GetObject("btnEncrypt.RightToLeft"), System.Windows.Forms.RightToLeft)
        Me.btnEncrypt.Size = CType(resources.GetObject("btnEncrypt.Size"), System.Drawing.Size)
        Me.btnEncrypt.TabIndex = CType(resources.GetObject("btnEncrypt.TabIndex"), Integer)
        Me.btnEncrypt.Text = resources.GetString("btnEncrypt.Text")
        Me.btnEncrypt.TextAlign = CType(resources.GetObject("btnEncrypt.TextAlign"), System.Drawing.ContentAlignment)
        Me.btnEncrypt.Visible = CType(resources.GetObject("btnEncrypt.Visible"), Boolean)
        '