我试了python中的加密，结果和这段c#方法加密出来的长度都不一样
大神帮我看看。




using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Test2
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var app_key = "xxxxxxx";
            var app_sec = "xxxxxx";
            var app_id = "xxxxxxx";
            var ts = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
            var url = $"/create/accesstoken?t={ts}";
            var body = $"{{\"app_id\":\"{app_id}\",\"app_key\":\"{app_key}\"}}";
            var hashKey = $"{app_sec}{ts}";
            var sign = CreateToken($"{url}{body}", hashKey);
            var reqUrl = $"https://openapi/create/accesstoken?t={ts}";
            var header = new Dictionary<string, string>();
            header.Add("x-tg-token", ts.ToString());
            header.Add("x-tg-sign", sign);
            var response = Post(reqUrl, body, header);
            Console.WriteLine($"CreateTokenResponse:{response}");
            var tokenResponse = JsonConvert.DeserializeObject<CreateToken>(response);
            url = $"/FlightChange/Add?t={ts}";
            body = "{\"AddType\":0,\"ChangeReason\":0,\"ChangeType\":\"1\",\"NewArrTime\":\"2019-11-04 22:30:00\",\"NewDepTime\":\"2019-11-04 18:55:00\",\"NewEndPort\":\"LHW\",\"NewFlightNo\":\"DR6593\",\"NewStartPort\":\"WNZ\",\"OrgArrTime\":\"2019-11-04 14:40:00\",\"OrgDepTime\":\"2019-11-04 14:40:00\",\"OrgEndPort\":\"LHW\",\"OrgFlightNo\":\"DR6593\",\"OrgStartPort\":\"WNZ\",\"RequestGuid\":\"eefdfaee0ac047fda68d048183bda7c4\"}";
            hashKey = $"{app_sec}{tokenResponse.access_token}";
            sign = CreateToken($"{url}{body}", hashKey);
            Console.WriteLine($"AppSign:{sign}");
            header = new Dictionary<string, string>();
            header.Add("x-tg-token", tokenResponse.access_token);
            header.Add("x-tg-sign", sign);
            header.Add("x-appkey", app_key);
            reqUrl = $"https://openapi.air.ly.com/FlightChange/Add?t={ts}";
            response = Post(reqUrl, body, header);
            Console.WriteLine($"AppApplyResponse:{response}");

            Console.ReadKey();
        }

        /// <summary>
        /// HTTP POTS请求
        /// </summary>
        /// <param name="requestUrl"></param>
        /// <param name="requestData"></param>
        /// <param name="headers"></param>
        /// <returns></returns>
        public static string Post(string requestUrl, string requestData, Dictionary<string, string> headers)
        {
            string result = string.Empty;

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUrl);
                byte[] data = Encoding.GetEncoding("UTF-8").GetBytes(requestData);
                request.Method = "Post";
                request.ContentType = "application/json";
                if (headers != null && headers.Any())
                {
                    foreach (var header in headers)
                    {
                        request.Headers[header.Key] = header.Value;
                    }
                }
                request.ContentLength = data.Length;
                request.Timeout = 100000;
                request.KeepAlive = false;
                using (var requestStream = request.GetRequestStream())
                {
                    requestStream.Write(data, 0, data.Length);
                    //响应流
                    HttpWebResponse m_Response = (HttpWebResponse)request.GetResponse();
                    var responseStream = m_Response.GetResponseStream();
                    var streamReader = new StreamReader(responseStream, Encoding.GetEncoding("UTF-8"));
                    //获取返回的信息
                    result = streamReader.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                result = ex.Message;
            }

            return result;
        }


        /// <summary>
        /// hamcSHA256加密实现
        /// </summary>
        /// <returns>The token.</returns>
        /// <param name="secret">Secret.</param>
        /// <param name="message">Message.</param>
        public static string CreateToken(string message, string secret)
        {
            secret = secret ?? "";
            var encoding = new System.Text.UTF8Encoding();
            byte[] keyByte = encoding.GetBytes(secret);
            byte[] messageBytes = encoding.GetBytes(message);
            using (var hmacsha256 = new HMACSHA256(keyByte))
            {
                byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
                return BitConverter.ToString(hashmessage).Replace("-", "").ToLower();
            }
        }
    }

    public class CreateToken
    {
        public string access_token { get; set; }
    }
}