using System;

using System.IO;

using System.Net;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string uri = string.Format("/api/carrier/order/{0}/status", 100000429); 

        string url = string.Format("https://delfin2.getprintbox.com{0}",uri);

        int orderStatus = 4;

        string json = string.Format("{{\"statusId\":{0}}}", orderStatus);

        string apiKey = "a3d4bacb-755e-4d0f-be39-da7e68f5e80c";

        string apiSecret = "eeyE6bHF0aFvwX3RHg4Au2abJBMA7F6W";

        string time = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:sszzz");

        string elHash = sha256(json);

        string text = string.Format("{0}\ntime:{1}\nrequestUri:{2}\n{3}", "POST",time, uri ,elHash);

​

        var aux = hmacSHA256(text, apiSecret);

        string signature = System.Convert.ToBase64String(aux);

        var http = (HttpWebRequest)WebRequest.Create(url);

        http.Accept = "application/json";

        http.ContentType = "application/json";

        http.Method = "POST";

        using (var streamWriter = new StreamWriter(http.GetRequestStream()))

        {

            streamWriter.Write(json);

            streamWriter.Flush();

            streamWriter.Close();

        }

        http.Headers.Add("Time", time);

        http.Headers.Add("Authorization", String.Format("Signature ApiKey=\"{0}\", Signature=\"{1}\"", apiKey, signature));

​

        try

        {

            var response = (HttpWebResponse)http.GetResponse();

            using (var streamReader = new StreamReader(response.GetResponseStream()))

            {

                var result = streamReader.ReadToEnd();

                Console.WriteLine(result);

            }

        }

        catch (Exception ex)

        {

            var a = ex.Message;

            throw;

        }

    }

    public static string sha256(string text)

    {

        using (SHA256 sha256Hash = SHA256.Create())

        {

            byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(text));

​

            StringBuilder builder = new StringBuilder();

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

            {

                builder.Append(bytes[i].ToString("x2"));

            }

​

            return builder.ToString();

        }  

    }

    public static byte[] hmacSHA256(string text, string apiKey)

    {

        var encoding = new ASCIIEncoding();

        byte[] textByte = encoding.GetBytes(text);

        byte[] apiKeyByte = encoding.GetBytes(apiKey);

        var hash = new HMACSHA256(apiKeyByte);

        return hash.ComputeHash(textByte);

    }

}