C# AES Encryption Byte Array

Question

I want to encrypt byte array. So first I try it in this site.

• key = 00000000000000000000000000000000
• IV = 00000000000000000000000000000000
• Input Data = 1EA0353A7D2947D8BBC6AD6FB52FCA84
• Type = CBC

It calculated this

• Encrypted Output = C5537C8EFFFCC7E152C27831AFD383BA

Then I use System.Security.Cryptography library and calculate it. But it gives me different result. Could you help me for that situation?

Code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.IO;
using System.Security.Cryptography;

namespace DesfireCalculation
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        byte key_no = 0x00;
        byte[] key = new byte[16] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
        byte[] IV = new byte[16] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        byte[] rndB = new byte[16] { 0x1E,0xA0,0x35,0x3A,0x7D,0x29,0x47,0xD8,0xBB,0xC6,0xAD,0x6F,0xB5,0x2F,0xCA,0x84 };

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                byte[] res=EncryptStringToBytes_Aes(BitConverter.ToString(rndB), key, IV);
                string res_txt = BitConverter.ToString(res);
                Console.WriteLine(res_txt);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: {0}", ex.Message);
            }
        }

        static byte[] EncryptStringToBytes_Aes(byte[] Data, byte[] Key, byte[] IV)
        {
            // Check arguments.
            if (Key == null || Key.Length <= 0)
                throw new ArgumentNullException("Key");
            if (IV == null || IV.Length <= 0)
                throw new ArgumentNullException("IV");
            byte[] encrypted;

            // Create an Aes object
            // with the specified key and IV.
            using (Aes aesAlg = Aes.Create())
            {
                aesAlg.Key = Key;
                aesAlg.IV = IV;
                aesAlg.Mode = CipherMode.CBC;
                aesAlg.BlockSize = 128;
                aesAlg.FeedbackSize = 128;
                aesAlg.KeySize = 128;

                // Create an encryptor to perform the stream transform.
                ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

                // Create the streams used for encryption.
                using (MemoryStream msEncrypt = new MemoryStream())
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                        {
                            //Write all data to the stream.
                             swEncrypt.Write(Data);
                        }
                        encrypted = msEncrypt.ToArray();
                    }
                }
            }

            // Return the encrypted bytes from the memory stream.
            return encrypted;    
        }
    }
}

Solution

The input data is different hence the result is different as well. On the site your plaintext is 'C5537C8EFFFCC7E152C27831AFD383BA' and in the code is 'B969FDFE56FD91FC9DE6F6F213B8FD1E'

Comments

[BK52]

thanks for interest and attention. I edited the code and example. But there is still different result for example and my code.