using NUnit.Framework;

using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        //

        // Your test

        //

        byte[] key = Encoding.ASCII.GetBytes("MYCRYKEY");

        byte[] src = Encoding.ASCII.GetBytes("123456789~~~~~~~");

​

        using DES des = DES.Create();

​

        des.Mode = CipherMode.CBC;          // Fix 1: Apply CBC

        des.Padding = PaddingMode.None;

        des.Key = key;

        des.IV = new byte[8];               // Fix 2: Apply an zero IV

        using ICryptoTransform crypt = des.CreateEncryptor();

​

        byte[] encrypted = crypt.TransformFinalBlock(src, 0, src.Length);

​

        // these are OK

        Assert.That(ToHex(key), Is.EqualTo("4D594352594B4559"));

        Assert.That(ToHex(src), Is.EqualTo("3132333435363738397E7E7E7E7E7E7E"));

​

        // this one now doesn't fail

        Assert.That(ToHex(encrypted), Is.EqualTo("F2E238B83939CBC1C33331A198463076"));

​

        //

        // Another test via decrypttion

        //

        using DES des2 = DES.Create();

​

        des2.Mode = CipherMode.CBC;         // Fix 1: Apply CBC

        des2.Padding = PaddingMode.None;

        des2.Key = key;

        des2.IV = new byte[8];               // Fix 2: Apply an zero IV

        using ICryptoTransform crypt2 = des2.CreateDecryptor();

​

        byte[] src2 = Convert.FromHexString("F2E238B83939CBC1C33331A198463076");

        byte[] decrypted = crypt2.TransformFinalBlock(src2, 0, src2.Length);

​

        Assert.That(ToHex(decrypted), Is.EqualTo(ToHex(src)));

        Console.WriteLine("Done...");

    }

    static string ToHex(byte[] bytes)

    {

       return BitConverter.ToString(bytes).Replace("-", "");

    }

}