C# ASP.net中用到的JWT身份验证

1.先通过NuGet添加JWT
2.新建一个JwtHelp类
 1 public class JwtHelp
 2     {
 3 
 4         //私钥  web.config中配置
 5         //"GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
 6         private static string secret = "footmark";
 7 
 8         /// <summary>
 9         /// 生成JwtToken
10         /// </summary>
11         /// <param name="payload">不敏感的用户数据</param>
12         /// <returns></returns>
13         public static string SetJwtEncode()
14         {
15 
16             //格式如下
17             IDateTimeProvider provider = new UtcDateTimeProvider();
18             var now = provider.GetNow();
19             var unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
20             //过期时间
21             var secondsSinceEpoch = Math.Round((now - unixEpoch).TotalSeconds);  
22 
23             var payload = new Dictionary<string, object>
24             {
25                 { "exp", secondsSinceEpoch+3600 },  //3600秒后过期
26                 { "username","admin" },
27                 { "password","123456" }
28             };
29 
30             IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
31             IJsonSerializer serializer = new JsonNetSerializer();
32             IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
33             IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);
34 
35             var token = encoder.Encode(payload, secret);
36             return token;
37         }
38 
39         /// <summary>
40         /// 根据jwtToken  获取实体
41         /// </summary>
42         /// <param name="token">jwtToken</param>
43         /// <returns></returns>
44         public static string GetJwtDecode(string token)
45         {
46             try
47             {
48                 IJsonSerializer serializer = new JsonNetSerializer();
49                 IDateTimeProvider provider = new UtcDateTimeProvider();
50                 IJwtValidator validator = new JwtValidator(serializer, provider);
51                 IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
52                 IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder);
53                 //token为之前生成的字符串
54                 var userInfo = decoder.DecodeToObject(token, secret, verify: true);
55                 //此处json为IDictionary<string, object> 类型
56                 string username = userInfo["username"].ToString();  //可获取当前用户名
57                 return "OK";
58                
59             }
60             catch (TokenExpiredException)
61             {
62                 Console.WriteLine("Token has expired");
63             }
64             catch (SignatureVerificationException)
65             {
66                 Console.WriteLine("Token has invalid signature");
67             }          
68             catch (Exception)
69             {
70 
71             }
72             return "Error";
73         }
74     }