JWT加密解密方法

JWT加密解密方法

      public static string Key { get; set; } = "123456789987654321";//解密串

        /// <summary>

        /// 加密方法

        /// </summary>

        /// <param name="payload">需要加密的字典</param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static string Encoder(Dictionary<string, object> payload, string key = null)

        {

            if (string.IsNullOrEmpty(key))

            {

                key = Key;

            }

            IJwtAlgorithm algorithm = new HMACSHA256Algorithm();

            IJsonSerializer serializer = new JsonNetSerializer();

            IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();

            IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);

            //设置失效时间

            payload.Add("timeout", DateTime.Now.AddMinutes(3));

            return encoder.Encode(payload, key);

        }

        /// <summary>

        /// 解密方法

        /// </summary>

        /// <param name="jwtStr"></param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static Dictionary<string, object> Decode(string jwtStr, string key = null)

        {

            if (string.IsNullOrEmpty(key))

            {

                key = Key;

            }

            try

            {

                IJwtAlgorithm algorithm = new HMACSHA256Algorithm();//HMACSHA256加密

                IJsonSerializer serializer = new JsonNetSerializer();

                IDateTimeProvider provider = new UtcDateTimeProvider();

                IJwtValidator validator = new JwtValidator(serializer, provider);

                IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();

                IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder, algorithm);

                var json = decoder.Decode(jwtStr, key, true);

                //把字符串反向生成对应的对象类

                var result = JsonConvert.DeserializeObject<Dictionary<string, object>>(json);

                if ((DateTime)result["timeout"] < DateTime.Now)

                {

                    result.Remove(key: "timeout");

                    throw new Exception(message: "jwt已经过期，请重新登陆");

                }

                return result;

            }

            catch (TokenExpiredException)

            {

                throw new Exception(message: "Token has expired");

            }

            catch (SignatureVerificationException)

            {

                throw new Exception(message: "Token has invalid signature");

            }

        }

        public static string CheckHeardTocken(HttpRequest request)

        {

            if (request.Headers["token"]==null)

            {

                throw new Exception("请登录");

            }

           return Newtonsoft.Json.JsonConvert.SerializeObject( Decode(request.Headers["token"]));

        }