秘钥标签验证-生成秘钥

1、出错地方

因为用转译后的编码生成签名秘钥导致请求一直失败；

解决办法：用原报文XML先 生成签名秘钥；传给接口用xml转译后;

        public static string GetHttpPostByAdds(string Url, string sendXml, string custID)
        {
            //解决 SSL/TLS 安全通道问题
            System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            //转译报文
            string sendInfo = HttpUtility.UrlEncode(sendXml, Encoding.GetEncoding("utf-8"));
            string resultStr = string.Empty;
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                request.Method = "POST";
                request.Timeout = 10000;
                request.ContentType = "application/x-www-form-urlencoded";
                //获取签名用原报文的
                string signValue = GetSign(sendXml, "123456");
                request.Headers.Add("serverName", "orderStatus");
                request.Headers.Add("CustID", custID);
                request.Headers.Add("sign", signValue);
                string contentStr = $"serverName=orderStatus&CustID={custID}&sign={signValue}&content={sendInfo}";//
                request.Headers.Add("content", contentStr);
                byte[] data = Encoding.GetEncoding("utf-8").GetBytes(contentStr);
                request.ContentLength = data.Length;
                Stream myRequestStream = request.GetRequestStream();
                myRequestStream.Write(data, 0, data.Length);
                myRequestStream.Close();
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));//
                resultStr = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
            }
            catch (WebException ex)
            {
                var errorSr = new StreamReader(ex.Response.GetResponseStream());
                resultStr = errorSr.ReadToEnd();
            }
            return resultStr;
        }


        /// <summary>
        /// 获取签名
        /// </summary>
        public static string GetSign(string content, string key)
        {
            string value = GetMd5(content + key);
            byte[] bytes = Encoding.GetEncoding("utf-8").GetBytes(value);
            return Convert.ToBase64String(bytes);
        }

        public static string GetMd5(string plaintextValue)
        {
            MD5 md = MD5.Create();
            byte[] t = md.ComputeHash(Encoding.GetEncoding("utf-8").GetBytes(plaintextValue));
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < t.Length; i++)
            {
                sb.Append(t[i].ToString("x").PadLeft(2, '0'));
            }
            return sb.ToString();
        }