Imports System.Security
Imports System.Security.Cryptography
Imports System.Text
Imports System.IO
Public Class Tester
Public Shared Sub Main
Try
Dim myDESProvider As DESCryptoServiceProvider = New DESCryptoServiceProvider()
myDESProvider.Key = ASCIIEncoding.ASCII.GetBytes("12345678")
myDESProvider.IV = ASCIIEncoding.ASCII.GetBytes("12345678")
Dim DecryptedFile As FileStream = New FileStream("testDes.txt", FileMode.Open, FileAccess.Read)
Dim myICryptoTransform As ICryptoTransform = myDESProvider.CreateDecryptor(myDESProvider.Key, myDESProvider.IV)
Dim myCryptoStream As CryptoStream = New CryptoStream(DecryptedFile, myICryptoTransform, CryptoStreamMode.Read)
Dim myDecStreamReader As New StreamReader(myCryptoStream)
Dim myDecStreamWriter As New StreamWriter("test.txt")
myDecStreamWriter.Write(myDecStreamReader.ReadToEnd())
myCryptoStream.Close()
myDecStreamReader.Close()
myDecStreamWriter.Close()
Catch ex As Exception
Console.WriteLine(ex.ToString())
End Try
End Sub
End Class