using System;

using System.Buffers.Text;

using System.Reflection.Emit;

using Jose;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string requestJson="hello";

        string enc=EncryptData(requestJson);

        Console.WriteLine("Hello enc-"+enc);

        string plain= DecryptData(enc);

        Console.WriteLine("Hello plain-"+plain);

    }

     public static string EncryptData(string data)

    {

     try

     {

​

         string StaticKey = "F55FnINFeMiZpmBl8mGGO/EJxZk6fIaJnR2jBt3d9GE=";

         string keyId = "f5cce0d5-b566-4821-9d3b-65ebc6f726aa";  // Dummy Key ID

         //Base64ToBinaryString

         byte[] cek = Convert.FromBase64String(StaticKey);

        //Creating header

        var header = new Dictionary<string, object>

          {

              { "kid", keyId }

          };

​

         var encryptedData = Jose.JWT.Encode(

             data,

             cek,

             JweAlgorithm.DIR,

             JweEncryption.A256GCM,

             null,

             header

         );

         return encryptedData;

     }

     catch (Exception ex)

     {

         return null;

     }

​

 }

     public static string DecryptData(string encryptedData)

 {

     try

     {

         byte[] StaticKey = Convert.FromBase64String("F55FnINFeMiZpmBl8mGGO/EJxZk6fIaJnR2jBt3d9GE=");

​

         if (string.IsNullOrWhiteSpace(encryptedData))

             throw new ArgumentException("Encrypted data cannot be null or empty.", nameof(encryptedData));

​

         // Decrypt the data

         var decrypteddata = Jose.JWT.Decode(

             encryptedData,

             StaticKey,

             JweAlgorithm.DIR,

             JweEncryption.A256GCM

​

         );

         return decrypteddata;

     }

     catch (Exception ex)

     {

         return null;

     }

 }

}