TestConsole/ConsoleApp1/OCPPAuth/Signature.cs

using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1.OCPPAuth
{
    internal static class Signature
    {
        public static void Test()
        {
            string signature = GetSignature(
                timestamp: "1731561763",
                partnerid: "8456AED9-6DD9-4BF3-A94C-9F5DCB9506F7",
                saltkey: "gfdfgy!12",
                requestUrl: "http://ebus-coreapi.azurewebsites.net/api/v1/ocpp16/diagnostics?ChargeBoxId=AXLU111001D1P1ZERO&Location=https://buscharge.zerovatech.com/service/File/&StartTime=2024-11-14&StopTime=2024-11-14");
        }

        private static string GetSignature(string timestamp, string partnerid, string saltkey , string requestUrl = "", string requestBody = "")
        {
            string diplayUrl = requestUrl.Replace("%20", " ").Replace(@"\\", @"\");
            string tempText = diplayUrl.Substring(diplayUrl.IndexOf('?') + 1).ToLower();
            tempText = tempText.StartsWith("http") ? string.Empty : tempText;
            var body = $"{tempText}{requestBody}";

            var unencodeText = $"{body}{timestamp}{partnerid}{saltkey}".ToLower();
            var signature = GetSignature(unencodeText);
            return signature;
        }

        private static string GetSignature(string unencodeText)
        {
            if ((unencodeText == null) || (unencodeText.Length == 0))
            {
                return String.Empty;
            }
            unencodeText = unencodeText.ToLower();

            MD5 md5 = MD5.Create();// new MD5CryptoServiceProvider();
            byte[] textToHash = Encoding.UTF8.GetBytes(unencodeText);
            byte[] result = md5.ComputeHash(textToHash);
            return BitConverter.ToString(result).Replace("-", "").ToLower();
        }
    }
}