using System;

using System.IO;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    protected static string SecretKey = "nei5XieQuoGhah1u";

    protected static string SecretFixed = "@portale_unicoop_tirreno";

    public static void Main()

    {

        Program.Encrypt("ppp");

    }

    protected static void Encrypt(string clearText) {

        string B64Part0Key = "OWRmMGI1MDdlMTdmZDQ5Nw==";

        byte[] b = Convert.FromBase64String(B64Part0Key);

        string Part0Key = System.Text.Encoding.UTF8.GetString(b);

        string Part1Key = CalculateMD5Hash(Program.SecretKey + Program.SecretFixed);

        Part1Key = Part1Key.Substring(0, 16);

        Console.WriteLine(Part0Key);

        Console.WriteLine(Part1Key);

        string KeyStr = Part0Key + Part1Key;

        //string ivStr = Guid.NewGuid().ToString().Substring(0, 16);

        Console.WriteLine(KeyStr);

        byte[] key = System.Text.Encoding.UTF8.GetBytes(KeyStr);

        //byte[] iv = System.Text.Encoding.UTF8.GetBytes(ivStr);

        byte[] encryptedBytes = null;

        byte[] bytesToBeEncrypted = System.Text.Encoding.UTF8.GetBytes(clearText);

        using (MemoryStream ms = new MemoryStream())

        {

            using (RijndaelManaged AES = new RijndaelManaged())

            {

                AES.KeySize = 256;

                AES.BlockSize = 256;

                //var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);

                AES.Key = key;

                //AES.IV = iv;

                AES.Mode = CipherMode.CBC;

                AES.Padding = PaddingMode.PKCS7;

                using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))

                {

                    cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);

                    cs.Close();

                }

                encryptedBytes = ms.ToArray();

                Console.WriteLine(AES.IV.Length);

                string retStr = Convert.ToBase64String(encryptedBytes);

                string ivStr = Convert.ToBase64String(AES.IV);

                Console.WriteLine(retStr);

                Console.WriteLine("https://local.portale-unicoop.netseven.it/n7-sso-api/test-decrypt2/fromnet7/"+Part0Key+","+retStr+","+ivStr);

            }

        }

        //encryptor.Key = key;

        //Console.WriteLine(KeyStr);

        //Console.WriteLine(ivStr);

        //Console.WriteLine(encryptor.Key.Length);

        //Console.WriteLine(encryptor.IV.Length);

        //Console.WriteLine(key.Length);

        //Console.WriteLine(iv.Length);

    }

    protected static string CalculateMD5Hash(string input)

    {

        // step 1, calculate MD5 hash from input

        MD5 md5 = System.Security.Cryptography.MD5.Create();

        byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);

        byte[] hash = md5.ComputeHash(inputBytes);

        // step 2, convert byte array to hex string

        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < hash.Length; i++)

        {

            sb.Append(hash[i].ToString("x2"));

        }

        return sb.ToString();

    }

}