//自定义对象            var payload = new {name="张三",age=110,time=DateTime.Now };            string key = "这是什么？";           string token=  JsonWebToken.Encode(payload, Encoding.UTF8.GetBytes(key), JwtHashAlgorithm.HS384);            //获取payload对象            var j2 = JsonWebToken.Decode(token, key, true);

 

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Security.Cryptography;using Newtonsoft.Json;namespace WindowsFormsApp10.Models{    public enum JwtHashAlgorithm    {        RS256,        HS384,        HS512    }    public class JsonWebToken    {        private static Dictionary
     
      > HashAlgorithms;        private static byte[] bb = new byte[10];        static JsonWebToken()        {            HashAlgorithms = new Dictionary
      
       >            {                {                    JwtHashAlgorithm.RS256,                    (x,y)=>{
   using(var h256=new HMACSHA256(x)){
   return h256.ComputeHash(y);}}},                { JwtHashAlgorithm.HS384, (x,y)=>{
   using(var h256=new HMACSHA384(x)){
   return h256.ComputeHash(y);}} },                { JwtHashAlgorithm.HS512, (x,y)=>{
   using(var h256=new HMACSHA512(x)){
   return h256.ComputeHash(y);}} }            };        }        public static string Encode(object payload, byte[] keyBytes, JwtHashAlgorithm algorithm)        {            List
       
         segments = new List
        
         ();            var header = new { alg = algorithm.ToString(), typ = "JWT" };            byte[] headerBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(header, Formatting.None));            byte[] payloadBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(payload, Formatting.None));            segments.Add(Base64UrlEncode(headerBytes));            segments.Add(Base64UrlEncode(payloadBytes));            string stringToSign = string.Join(".", segments.ToArray());            byte[] bytesToSign = Encoding.UTF8.GetBytes(stringToSign);            byte[] signature = HashAlgorithms[algorithm](keyBytes, bytesToSign);            segments.Add(Base64UrlEncode(signature));            return string.Join(".", segments);        }        private static string Base64UrlEncode(byte[] input)        {            string output = Convert.ToBase64String(input);            output = output.Split('=')[0];            output = output.Replace("+", "-").Replace("/", "_");            return output;        }        public static string Decode(string token, string key, bool verify)        {            string[] parts = token.Split('.');            string header = parts[0];            string payload = parts[1];            byte[] crypto = Base64UrlDecode(parts[2]);            string headerJson = Encoding.UTF8.GetString(Base64UrlDecode(header));            var headerData = Newtonsoft.Json.Linq.JObject.Parse(headerJson);            string payloadJson = Encoding.UTF8.GetString(Base64UrlDecode(payload));            var payloadDaata = Newtonsoft.Json.Linq.JObject.Parse(payloadJson);            if (verify)            {                var bytesToSign = Encoding.UTF8.GetBytes(header + "." + payload);                byte[] keyBytes = Encoding.UTF8.GetBytes(key);                string algorithm = (string)headerData["alg"];                var signature = HashAlgorithms[GetHashAlgorithm(algorithm)](keyBytes, bytesToSign);                var decodedCrypto = Convert.ToBase64String(crypto);                var decodedSignature = Convert.ToBase64String(signature);                if (decodedCrypto != decodedSignature)                {                    throw new ApplicationException(string.Format("Invalid signature. Expected {0} got {1}", decodedCrypto, decodedSignature));                }            }            return payloadDaata.ToString();        }        private static JwtHashAlgorithm GetHashAlgorithm(string algorithm)        {            switch (algorithm)            {                case "RS256":                    return JwtHashAlgorithm.RS256;                case "HS384":                    return JwtHashAlgorithm.HS384;                case "HS512":                    return JwtHashAlgorithm.HS512;                default:                    throw new InvalidOperationException("Algorithm not supported.");            }        }        private static byte[] Base64UrlDecode(string input)        {            string output = input.Replace('-', '+').Replace('_', '/');            switch (output.Length % 4)            {                case 0:                    break;                case 2:                    output += "==";                    break;                case 3:                    output += "=";                    break;                default:                    throw new System.Exception("Illegal base64url string!");            }            return Convert.FromBase64String(output);        }    }}
        
       
      
     

 

完！