Click here for Part 1 of the article.
How we Decrypt the text File using DES
method.
1. Open visual studio and create a project
2. Add the following assembly on the page
using
System;
using
System.Collections;
using
System.Collections.Generic;
using
System.Data;
using
System.Diagnostics;
using
System.Security;
using
System.Security.Cryptography;
using
System.Text;
using
System.IO;
3. Now write the code in the
Page
public class Tester
{
public static void Main()
{
try
{
DESCryptoServiceProvider
myDESProvider = new
DESCryptoServiceProvider();
myDESProvider.Key = ASCIIEncoding.ASCII.GetBytes("12345678");
myDESProvider.IV = ASCIIEncoding.ASCII.GetBytes("12345678");
FileStream DecryptedFile =
new FileStream("testDes.txt",
FileMode.Open,
FileAccess.Read);
ICryptoTransform myICryptoTransform =
myDESProvider.CreateDecryptor(myDESProvider.Key, myDESProvider.IV);
CryptoStream myCryptoStream =
new CryptoStream(DecryptedFile,
myICryptoTransform, CryptoStreamMode.Read);
StreamReader myDecStreamReader =
new StreamReader(myCryptoStream);
StreamWriter myDecStreamWriter =
new StreamWriter("p1.txt");
myDecStreamWriter.Write(myDecStreamReader.ReadToEnd());
myCryptoStream.Close();
myDecStreamReader.Close();
myDecStreamWriter.Close();
}
catch (Exception
ex)
{
Console.WriteLine(ex.ToString());
}
}
}
4. Now
convert the encrypted text file in the folder D:\New Folder
(2)\ConsoleApplication4\ConsoleApplication4\bin\Debug (My text file path) to
decrypted text file.
Now start
debugging, you will see a testDes.txt file automatically converted into p1.text
Decrypted text file.