Decrypt a Des Encryted File
Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.IO
Imports System.Data.OleDb
Imports System.Data.Common
Imports System.Data.SqlClient
Imports System.Data
Imports System.Security
Imports System.Security.Cryptography
Public Class MainClass
Shared Sub Main()
Dim fs As FileStream = New FileStream("DSencrypted.dat",FileMode.Create, FileAccess.Write)
Dim MyDS As DataSet = New DataSet()
Dim MyDS2 As DataSet = New DataSet()
Dim Connection As SqlConnection = New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=MyDatabase;Integrated Security=SSPI")
Connection.Open()
Dim MyDA As SqlDataAdapter = New SqlDataAdapter("SELECT * FROM Employee", Connection)
MyDA.Fill(MyDS, "Employee")
Dim DES As DESCryptoServiceProvider = New DESCryptoServiceProvider()
Dim DESencrypter As ICryptoTransform = DES.CreateEncryptor()
Dim cryptStream As CryptoStream = New CryptoStream(fs, DESencrypter, CryptoStreamMode.Write)
MyDS.WriteXml(cryptStream, XmlWriteMode.WriteSchema)
cryptStream.Close()
Dim fsRead As FileStream = New FileStream("DSencrypted.dat", _
FileMode.Open, FileAccess.Read)
Dim DESdecrypter As ICryptoTransform = DES.CreateDecryptor()
Dim decryptStream As CryptoStream = New CryptoStream(fsRead, _
DESdecrypter, CryptoStreamMode.Read)
Dim plainStreamR As XmlTextReader = New XmlTextReader(decryptStream)
MyDS2.ReadXml(plainStreamR, XmlReadMode.ReadSchema)
End Sub
End Class
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