using NUnit.Framework;

using System;

using System.IO;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        int blockSize = 16;

        byte[] input = Encoding.UTF8.GetBytes("The quick brown fox jumps over the lazy dog");

​

        var encr0 = encrypt(subArray(input, 0, blockSize * 2)); 

        var encr1 = encrypt(subArray(input, 0, blockSize));

        var encr2 = encrypt(subArray(input, blockSize, blockSize), subArray(encr1, 0, blockSize)); // Fix!

        Assert.IsTrue(encr2.SequenceEqual(subArray(encr0, blockSize)));  

​

        var encrAll = encrypt(input);

        Write(encr0);

        Write(encr1);

        Write(encr2);

        Write(encrAll);

    }

​

    static byte[] encrypt(byte[] input, byte[] iv = null)

    {

        var aes = new AesManaged();

        aes.KeySize = 128;

        aes.Key = new byte[16] { 0x0F, 0xD4, 0x33, 0x82, 0xF4, 0xDF, 0x62, 0xA5, 0x55, 0x7C, 0x6E, 0x92, 0xC5, 0x64, 0x67, 0xA9 };

        aes.IV = (iv != null) ? iv : new byte[16] { 0xB3, 0x87, 0xDA, 0xA0, 0x47, 0x7C, 0x52, 0x76, 0xCB, 0x3A, 0x69, 0x9B, 0x0F, 0x82, 0xAF, 0xA7 };

​

        using (var stream = new MemoryStream())   // size limit is 2 GB

        using (var cryptoStream = new CryptoStream(stream,

                aes.CreateEncryptor(), CryptoStreamMode.Write))

        {

            cryptoStream.Write(input, 0, input.Length);

            cryptoStream.FlushFinalBlock();

            return stream.ToArray();    // max number of bytes = int.MaxValue

        }

    }

​

    static byte[] subArray(byte[] source, int start, int length = -1)

    {

        if (length == -1) length = source.Length - start;

        var target = new byte[length];

        Buffer.BlockCopy(source, start, target, 0, length);

        return target;

    }

​

    static void Write(byte[] data)

    {

        string hex = Convert.ToHexString(data);

        Console.WriteLine(System.Text.RegularExpressions.Regex.Replace(hex, ".{32}", "$0 "));

    }

}