using System;

using System.Security.Cryptography;

using System.Text;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Encrypt("SourceString123", "fsgerh", "Dataehaeh"));

        Console.WriteLine(Decrypt("Vql0pOr7ouxfUScI3H8exeFbfmcfE5uM3TBtAZXAq0zwkJmqEe13EA==", "fsgerh", "Dataehaeh"));

    }

​

    public static string Encrypt(string value, string password, string salt)

    {

        DeriveBytes rgb = new Rfc2898DeriveBytes(password, Encoding.Unicode.GetBytes(salt));

        SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();

        byte[] rgbKey = rgb.GetBytes(algorithm.KeySize >> 3);

        byte[] rgbIV = rgb.GetBytes(algorithm.BlockSize >> 3);

        ICryptoTransform transform = algorithm.CreateEncryptor(rgbKey, rgbIV);

        using (MemoryStream buffer = new MemoryStream())

        {

            using (CryptoStream stream = new CryptoStream(buffer, transform, CryptoStreamMode.Write))

            {

                using (StreamWriter writer = new StreamWriter(stream, Encoding.Unicode))

                {

                    writer.Write(value);

                }

            }

            return Convert.ToBase64String(buffer.ToArray());

        }

    }

​

    public static string Decrypt(string text, string password, string salt)

    {

        DeriveBytes rgb = new Rfc2898DeriveBytes(password, Encoding.Unicode.GetBytes(salt));

        SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();

        byte[] rgbKey = rgb.GetBytes(algorithm.KeySize >> 3);

        byte[] rgbIV = rgb.GetBytes(algorithm.BlockSize >> 3);

        ICryptoTransform transform = algorithm.CreateDecryptor(rgbKey, rgbIV);

        using (MemoryStream buffer = new MemoryStream(Convert.FromBase64String(text)))

        {

            using (CryptoStream stream = new CryptoStream(buffer, transform, CryptoStreamMode.Read))

            {

                using (StreamReader reader = new StreamReader(stream, Encoding.Unicode))

                {

                    return reader.ReadToEnd();

                }

            }

        }

    }

}