using System;

using System.Text;

using System.Text.Json;

using System.Security.Cryptography;

​

public class req

    {

        public string AppID { get; set; }

        public string ApplicationName { get; set; }

        public string UserID { get; set; }

        public string UserIP { get; set; }

        public string AccessType { get; set; } = "ACCESS";

        public string ResourceAccessed { get; set; }

        public string RequestMethod { get; set; }

        public string RequestHeaders { get; set; }

        public int ResponseStatus { get; set; }

        public long ResponseTime { get; set; }

        public string SessionID { get; set; }

        public string AdditionalData { get; set; }

        public string UserAgent { get; set; }

        public string Hostname { get; set; }

    public req(){

        this.ApplicationName = "SusantoTest";

        this.UserID = "shariyanto";

        this.ResourceAccessed = "get";

        this.AppID = "test-moodle";

    }   

}

​

public class Program

{

    public static void Main()

    {

        var r = new req();

        string jsonAlReq = JsonSerializer.Serialize(r) + r.AppID;

        byte[] salt = new byte[16]; 

        RandomNumberGenerator.Fill(salt);

​

        using var sha256 = SHA256.Create();

        byte[] hash = sha256.ComputeHash(Encoding.UTF8.GetBytes(Convert.ToBase64String(salt) + jsonAlReq));

        Console.WriteLine(jsonAlReq);

        Console.WriteLine($"{Convert.ToBase64String(salt)}.{Convert.ToBase64String(hash)}");

    }

}