Hallo!
Ich möchte gerne meine AES Verschlüsselung zum laufen bringen!
Er unterstreicht beim Klick auf "Entschlüsseln"
Ideen?
MfG
Ich möchte gerne meine AES Verschlüsselung zum laufen bringen!
Quote:
Imports System.Security.Cryptography
Imports System.IO
Imports System.Text
Public Class Form1
Inherits System.Windows.Forms.Form
' Encrypt using stream (binary)
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim rd As New RijndaelManaged
Dim md5 As New MD5CryptoServiceProvider
Dim key() As Byte = md5.ComputeHash(Encoding.UTF8.GetBytes(RichTextBox 1.Text))
md5.Clear()
rd.Key = key
rd.GenerateIV()
Dim iv() As Byte = rd.IV
Dim ms As New MemoryStream
ms.Write(iv, 0, iv.Length)
Dim cs As New CryptoStream(ms, rd.CreateEncryptor, CryptoStreamMode.Write)
Dim data() As Byte = System.Text.Encoding.UTF8.GetBytes(RichTextBox2.Te xt)
cs.Write(data, 0, data.Length)
cs.FlushFinalBlock()
Dim encdata() As Byte = ms.ToArray()
TextBox1.Text = Convert.ToBase64String(encdata)
cs.Close()
rd.Clear()
RichTextBox2.Text = ""
End Sub
' Decrypt using stream (binary)
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim rd As New RijndaelManaged
Dim rijndaelIvLength As Integer = 16
Dim md5 As New MD5CryptoServiceProvider
Dim key() As Byte = md5.ComputeHash(Encoding.UTF8.GetBytes(RichTextBox 1.Text))
md5.Clear()
Dim encdata() As Byte = Convert.FromBase64String(TextBox1.Text)
Dim ms As New MemoryStream(encdata)
Dim iv(15) As Byte
ms.Read(iv, 0, rijndaelIvLength)
rd.IV = iv
rd.Key = key
Dim cs As New CryptoStream(ms, rd.CreateDecryptor, CryptoStreamMode.Read)
Dim data(ms.Length - rijndaelIvLength) As Byte
Dim i As Integer = cs.Read(data, 0, data.Length)
RichTextBox2.Text = System.Text.Encoding.UTF8.GetString(data, 0, i)
cs.Close()
rd.Clear()
End Sub
Private Sub RichTextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox2.TextChanged
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Close()
End Sub
Private Sub Label4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label4.Click
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class
Er unterstreicht beim Klick auf "Entschlüsseln"
Und sagt: Dividieren sie nicht durch 0Quote:
data(ms.Length - rijndaelIvLength) As Byte
Ideen?
MfG
