using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        string passwordEncriptada = Encriptar("44891252");

        Console.WriteLine(passwordEncriptada);

        string passwordDesencriptada = Desencriptar("4ygeT15/qyDCBnur851glrdvPaPvlZDekGpBWsP+xM8=");

        Console.WriteLine(passwordDesencriptada);

    }

    private static string _aesIV = @"!QBD2WSL#EFC5RFV";

    private static string _aesKey = @"6TGB&ZGN7ULK(IK<";

​

    public static String AesIV

    {

        get { return _aesIV; }

        set { _aesIV = value; }

    }

​

    public static String AesKey

    {

        get { return _aesKey; }

        set { _aesKey = value; }

    }

​

    public static string Encriptar(string text)

    {

        if (text == null) return null;

​

        try

        {

            using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider())

            {

                aes.BlockSize = 128;

                aes.KeySize = 128;

                aes.IV = Encoding.UTF8.GetBytes(AesIV);

                aes.Key = Encoding.UTF8.GetBytes(AesKey);

                aes.Mode = CipherMode.CBC;

                aes.Padding = PaddingMode.PKCS7;

​

                // Convert string to byte array

                byte[] src = Encoding.Unicode.GetBytes(text.ToString());

​

                // encryption

                using (ICryptoTransform encrypt = aes.CreateEncryptor())

                {

                    byte[] dest = encrypt.TransformFinalBlock(src, 0, src.Length);

​

                    // Convert byte array to Base64 strings

                    return Convert.ToBase64String(dest);

                }

            }

        }

        catch

        {

            return null;

        }

    }

    public static string Desencriptar(string text)

        {

            if (text == null) return null;

​

            try

            {

                using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider())

                {

                    aes.BlockSize = 128;

                    aes.KeySize = 128;

                    aes.IV = Encoding.UTF8.GetBytes(AesIV);

                    aes.Key = Encoding.UTF8.GetBytes(AesKey);

                    aes.Mode = CipherMode.CBC;

                    aes.Padding = PaddingMode.PKCS7;

​

                    // Convert Base64 strings to byte array

                    byte[] src = System.Convert.FromBase64String(text);

​

                    // decryption

                    using (ICryptoTransform decrypt = aes.CreateDecryptor())

                    {

                        byte[] dest = decrypt.TransformFinalBlock(src, 0, src.Length);

                        return Encoding.Unicode.GetString(dest);

                    }

                }

            }

            catch

            {

                return null;

            }

        }

}