ASP.NET MVC 在WebService中Token的使用方法

接口:WebService

方式:Token动态加密签名;

名词解释:Token就是服务端和客户端约定好的一个固定的密码字符串。微信接口上这么写的我就直接般过来了,结果有朋友不理解。

WebService头参数说明:

Signature:加密签名,字符串类型;

Timestamp:当前时间戳,DateTime类型(注意客户端时间和服务端时间差不能大于7秒,可以修改)

Nonce:随机数,字符串类型;

参数处理:

  1. 客户端用Token+ Timestamp+ Nonce后的字符串进行字典排序;
  2. 客户端将排序后的字符串进行MD5加密;
  3. 将加密后的字符串作为Signature参数传到服务端;

服务端接受到参数后也是按照,自己的Token+客户传的Timestamp+客户传的 Nonce 然后同样按照字典排序,MD5加密后和客户端的Signature参数做对比,如果一致则验证成功!(服务器要验证客户端传入的时间戳参数和系统当前时间差值不能大于7秒,以保证口令过期后不能用)。

服务端代码:

   /// <summary>

    /// WebService接口 SoapHeader类

    /// </summary>

    public class APISoapHeader : System.Web.Services.Protocols.SoapHeader

    {

        /// <summary>

        ///  加密签名

        /// </summary>

        public string signature { get; set; }

        /// <summary>

        /// 时间戳

        /// </summary>

        public DateTime timestamp{ get; set; }

        /// <summary>

        /// 随机数

        /// </summary>

        public string nonce { get; set; }

    }

 

    /// <summary>

    /// WebService1 的摘要说明

    /// </summary>

    [WebService(Namespace = "http://tempuri.org/")]

    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    [System.ComponentModel.ToolboxItem(false)]

    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消注释以下行。

    // [System.Web.Script.Services.ScriptService]

    public class WebService1 : System.Web.Services.WebService

    {

        public APISoapHeader header { get; set; }

 

        [System.Web.Services.Protocols.SoapHeader("header")]

        [WebMethod]

        public string HelloWorld(string msg)

        {

            if (header != null && TokenHelper.TokenVerify(header.signature, header.timestamp, header.nonce))

            {

                return "Hello World:" + msg;

            }

            else

            {

                return "NO";

            }

        }

}

 

 

 

验证代码:

  public abstract class TokenHelper

    {

        /// <summary>

        /// 验证加密签名

        /// </summary>

        /// <param name="header"></param>

        /// <returns></returns>

        public static bool TokenVerify(string signature,DateTime timestamp, string nonce)

        {

 

            bool isok = false;

            if (!string.IsNullOrEmpty(signature)

                && !string.IsNullOrEmpty(nonce))

            {

                TimeSpan ts = DateTime.Now.Subtract(timestamp).Duration();

 

                if (ts.Seconds < 7)//如果请求端时间戳与系统时间差小于7秒则继续验证

                {

                    if (signature.Equals(TokenHelper.GetSignature(timestamp, nonce)))

                    {

                        return true;

                    }

                }

            }

 

            return isok;

        }

        /// <summary>

        /// 获取加密签名

        /// </summary>

        /// <param name="timestamp"></param>

        /// <param name="nonce"></param>

        /// <returns></returns>

        public static string GetSignature(DateTime timestamp, string nonce)

        {

            string token = System.Configuration.ConfigurationManager.AppSettings["APIToken"];

            string str = string.Format("{0}{1}{2}", token, timestamp.ToString(), nonce);

            List<char> str2 = str.ToList<char>();

            str2.Sort();

            string str3 = "";

            foreach (var item in str2)

            {

                str3 = string.Format("{0}{1}", str3, item.ToString());

            }

            return TokenHelper.MD5Encrypt(str3);

        }

        /// <summary>

        /// MD5加密

        /// </summary>

        /// <param name="strText"></param>

        /// <returns></returns>

        public static string MD5Encrypt(string strText)

        {

            string cryptStr = "";

            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

            byte[] bytes = Encoding.UTF8.GetBytes(strText);

            byte[] cryptBytes = md5.ComputeHash(bytes);

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

            {

                cryptStr += cryptBytes[i].ToString("X2");

            }

            return cryptStr;

        }

 

    }

 

测试代码:

 

    class Program

    {

        static void Main(string[] args)

        {

          

 

            string msg = Console.ReadLine();

            ServiceReference1.WebService1SoapClient client = new ServiceReference1.WebService1SoapClient();

 

            ServiceReference1.APISoapHeader header = new ServiceReference1.APISoapHeader();

            Random random = new Random();

            header.timestamp = DateTime.Now;

            header.nonce = random.Next(0, 100).ToString();

            header.signature = TokenHelper.GetSignature(header.timestamp, header.nonce);

            //Thread.Sleep(7000);//如果大于7秒则失败;

            msg = client.HelloWorld(header, msg);

            Console.WriteLine(msg)

            Console.ReadKey();

        }

    } 

该方法的好处就是传输的密码是随时变化的,而且就算是第三方截获了密码,去根据两个动态值解密也相当困难,而且截获的密码也只能用7秒,7秒后则自动失效;

posted @ 2018-12-20 14:11  称虚圆  阅读(837)  评论(0编辑  收藏  举报