using System;

using System.Text;

using System.Security.Cryptography;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var p = new Program();

        var time = DateTimeOffset.Now.ToUnixTimeSeconds().ToString();

        //Console.WriteLine("Time  : " + time);

        //var resHexHash = p.CalculateMD5Hash("ur5av7xc5k28py4ks63ga3hx"+"jsDPKD5qLNbLjsgw6O9nqAuv"+time);

        //Console.WriteLine( resHexHash.ToString());

        Console.WriteLine(p.GenerateSignature("ur5av7xc5k28py4ks63ga3hx","jsDPKD5qLNbLjsgw6O9nqAuv",time));//ANTHEM

        Console.WriteLine(p.GenerateSignature("rdhw49kdn6mxxzwyhbr97a53","2iawVzh3yxw5Mu2VHKAMFEU2",time));//NC

    }

    private string CalculateMD5Hash(string input)

    {

        // step 1, calculate MD5 hash from input

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

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

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

        // step 2, convert byte array to hex string

        StringBuilder sb = new StringBuilder();

        hash.ToList().ForEach(h => sb.Append(h.ToString("x2")));

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

        {

            //sb.Append(hash[i].ToString("X2"));

            Console.WriteLine("BYTE  : " + hash[i].ToString());

            Console.WriteLine("HEX1  : " + hash[i].ToString());

            Console.WriteLine("HEX2  : " + hash[i].ToString("X2"));

            Console.WriteLine("HEX3  : " + hash[i].ToString("x2"));

            Console.WriteLine("");

        }

        Console.WriteLine("BitConverter :");

        Console.WriteLine(BitConverter.ToString(hash).Replace("-","").ToLower());

        return sb.ToString();

    }

    protected string GenerateSignature(string apiKey, string sharedSecret, string unixEpochTimeStampInSeconds)

    {

       // Step 1, calculate MD5 hash from input

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

​

       byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(apiKey + sharedSecret + unixEpochTimeStampInSeconds);

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

​

       // Step 2, convert byte array to hex string

       return BitConverter.ToString(hash).Replace("-", "").ToLower();

    }

​

​

}