3568, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
using System.IO;
using System.Text;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        { 
            
            /*string text = System.IO.File.ReadAllText(@"C:\Test\Words.txt");*/
            
            
            
            /***********************Encryption**********************************************/
            // Get the bytes of the string
            byte[] bytesToBeEncrypted = Encoding.UTF8.GetBytes("My name is Billly Bob 3568");
            byte[] passwordBytes = Encoding.UTF8.GetBytes("Password");
        
            // Hash the password with SHA256
            passwordBytes 
().ComputeHash(passwordBytes);
        
            byte[] bytesEncrypted = AES_Encrypt(bytesToBeEncrypted, passwordBytes);
        
            string encryptedResult = Convert.ToBase64String(bytesEncrypted);
            /***********************End*Encryption******************************************/
            
            
            /***********************Decryption**********************************************/
            // Get the bytes of the string
            byte[] bytesToBeDecrypted = Convert.FromBase64String(encryptedResult);
            byte[] passwordBytesdecrypt = Encoding.UTF8.GetBytes("Password");
            passwordBytesdecrypt = SHA256.Create().ComputeHash(passwordBytesdecrypt);
        
            byte[] bytesDecrypted = AES_Decrypt(bytesToBeDecrypted, passwordBytes);
        
            string decryptedResult = Encoding.UTF8.GetString(bytesDecrypted);
            /***********************End*Decryption******************************************/
            
            Console.WriteLine("Encrypted: " + encryptedResult);
            Console.WriteLine("Decrypted: " + decryptedResult);
        }
        
        public static byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
        {
            byte[] encryptedBytes = null;
        
            // Set your salt here, change it to meet your flavor:
            // The salt bytes must be at least 8 bytes.
            byte[] saltBytes = new byte[] { 2, 1, 7, 3, 6, 4, 8, 5 };
        
            using (MemoryStream ms = new MemoryStream())
            {
                using (RijndaelManaged AES = new RijndaelManaged())
                {
                    AES.KeySize = 256;
                    AES.BlockSize = 128;
        
                    var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
                    AES.Key = key.GetBytes(AES.KeySize / 8);
                    AES.IV = key.GetBytes(AES.BlockSize / 8);
        
                    AES.Mode = CipherMode.CBC;
        
                    using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
                        cs.Close();
                    }
                    encryptedBytes = ms.ToArray();
                }
            }
        
            return encryptedBytes;
        }
        
        public static byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
        {
            byte[] decryptedBytes = null;
        
            // Set your salt here, change it to meet your flavor:
            // The salt bytes must be at least 8 bytes.
            byte[] saltBytes = new byte[] { 2, 1, 7, 3, 6, 4, 8, 5 };
        
            using (MemoryStream ms = new MemoryStream())
            {
                using (RijndaelManaged AES = new RijndaelManaged())
                {
                    AES.KeySize = 256;
                    AES.BlockSize = 128;
        
                    var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
                    AES.Key = key.GetBytes(AES.KeySize / 8);
                    AES.IV = key.GetBytes(AES.BlockSize / 8);
        
                    AES.Mode = CipherMode.CBC;
        
                    using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
                        cs.Close();
                    }
                    decryptedBytes = ms.ToArray();
                }
            }
        
            return decryptedBytes;
        }
    }
}

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Compilation time: 0,16 s