using System;

using System.IO;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    static readonly string PasswordHash = "P@@Sw0rd";

    static readonly string SaltKey = "S@LT&KEY";

    static readonly string VIKey = "@1B2c3D4e5F6g7H8";

    public static void Main()

    {

        string password = "KiZeJSQjQCE=";

        Console.WriteLine(Encrypt(password));

    }

    public static string Encrypt(string plainText)

        {

            byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);

​

            byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);

            var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };

            var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));

​

            byte[] cipherTextBytes;

​

            using (var memoryStream = new MemoryStream())

            {

                using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))

                {

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

                    cryptoStream.FlushFinalBlock();

                    cipherTextBytes = memoryStream.ToArray();

                    cryptoStream.Close();

                }

                memoryStream.Close();

            }

            return Convert.ToBase64String(cipherTextBytes);

        }

}