c#關(guān)于JWT跨域身份驗(yàn)證的實(shí)現(xiàn)代碼

static IJwtAlgorithm algorithm = new HMACSHA256Algorithm();//HMACSHA256加密
 static IJsonSerializer serializer = new JsonNetSerializer();//序列化和反序列
 static IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();//Base64編解碼
 static IDateTimeProvider provider = new UtcDateTimeProvider();//UTC時(shí)間獲取
const string secret = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC4aKpVo2OHXPwb1R7duLgg";//服務(wù)端
public static string CreateJWT(Dictionary<string, object> payload)
{
      IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);
      return encoder.Encode(payload, secret);
}

public string Encode(IDictionary<string, object> extraHeaders, object payload, byte[] key)
    {
      if (payload is null)
        throw new ArgumentNullException(nameof(payload));

      var segments = new List<string>(3);

      var header = extraHeaders is null ? new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase) : new Dictionary<string, object>(extraHeaders, StringComparer.OrdinalIgnoreCase);
      header.Add("typ", "JWT");
      header.Add("alg", _algorithm.Name);

      var headerBytes = GetBytes(_jsonSerializer.Serialize(header));
      var payloadBytes = GetBytes(_jsonSerializer.Serialize(payload));

      segments.Add(_urlEncoder.Encode(headerBytes));
      segments.Add(_urlEncoder.Encode(payloadBytes));

      var stringToSign = String.Join(".", segments.ToArray());
      var bytesToSign = GetBytes(stringToSign);

      var signature = _algorithm.Sign(key, bytesToSign);
      segments.Add(_urlEncoder.Encode(signature));

      return String.Join(".", segments.ToArray());
    }

public static bool ValidateJWT(string token, out string payload, out string message)
    {
      bool isValidted = false;
      payload = "";
      try
      {
        IJwtValidator validator = new JwtValidator(serializer, provider);//用于驗(yàn)證JWT的類

        IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder);//用于解析JWT的類
        payload = decoder.Decode(token, secret, verify: true);

        isValidted = true;

        message = "驗(yàn)證成功";
      }
      catch (TokenExpiredException)//當(dāng)前時(shí)間大于負(fù)載過(guò)期時(shí)間（負(fù)荷中的exp），會(huì)引發(fā)Token過(guò)期異常
      {
        message = "過(guò)期了！";
      }
      catch (SignatureVerificationException)//如果簽名不匹配，引發(fā)簽名驗(yàn)證異常
      {
        message = "簽名錯(cuò)誤！";
      }
      return isValidted;
    }

class Program
  {
    static void Main(string[] args)
    {
      //載荷（payload）
      var payload = new Dictionary<string, object>
      {
        { "iss","流月無(wú)雙"},//發(fā)行人
        { "exp", DateTimeOffset.UtcNow.AddSeconds(10).ToUnixTimeSeconds() },//到期時(shí)間
        { "sub", "testJWT" }, //主題
        { "aud", "USER" }, //用戶
        { "iat", DateTime.Now.ToString() }, //發(fā)布時(shí)間 
        { "data" ,new { name="111",age=11,address="hubei"} }
      };
      //生成JWT
      Console.WriteLine("******************生成JWT*******************");
      string JWTString = JwtHelper.CreateJWT(payload);
      Console.WriteLine(JWTString);
      Console.WriteLine();

      //校驗(yàn)JWT
      Console.WriteLine("*******************校驗(yàn)JWT，獲得載荷***************");
      string ResultMessage;//需要解析的消息
      string Payload;//獲取負(fù)載
      if (JwtHelper.ValidateJWT(JWTString, out Payload, out ResultMessage))
      {
        Console.WriteLine(Payload);
      }
      Console.WriteLine(ResultMessage);//驗(yàn)證結(jié)果說(shuō)明
      Console.WriteLine("*******************END*************************");
    }
  }