Asp.net Core中实现自定义身份认证

Asp.Net Core中虽然集成了许多常用的身份认证，但很多时候，我们还是需要实现自己的身份认证接口，本文这里就简单的介绍下如何实现自定义身份认证接口。

首先写一个简单的接口。

[Authorize]
[HttpGet]
public object Foo()
{
return DateTime.Now.ToString();
}

由于有Authorize标记，访问函数体前会判断用户是否通过认证，由于这里没有通过认证，会的得到一个500错误。

Asp.net Core中实现自定义身份认证

自定义认证处理类：

实现一个IAuthenticationHandler接口即可：

 1     public class MyAuthHandler : IAuthenticationHandler
 2     {
 3         public const string SchemeName = "MyAuth";
 4 
 5         AuthenticationScheme _scheme;
 6         HttpContext          _context;
 7 
 8         /// <summary>
 9         /// 初始化认证
10         /// </summary>
11         public Task InitializeAsync(AuthenticationScheme scheme, HttpContext context)
12         {
13             _scheme  = scheme;
14             _context = context;
15             return Task.CompletedTask;
16         }
17 
18         /// <summary>
19         /// 认证处理
20         /// </summary>
21         public Task<AuthenticateResult> AuthenticateAsync()
22         {
23             var req     = _context.Request.Query;
24             var isLogin = req["isLogin"].FirstOrDefault();
25 
26             if (isLogin != "true")
27             {
28                 return Task.FromResult(AuthenticateResult.Fail("未登陆"));
29             }
30 
31             var ticket = GetAuthTicket("test", "test");
32             return Task.FromResult(AuthenticateResult.Success(ticket));
33         }
34 
35         AuthenticationTicket GetAuthTicket(string name, string role)
36         {
37             var claimsIdentity = new ClaimsIdentity(new Claim[]
38             {
39                 new Claim(ClaimTypes.Name, name),
40                 new Claim(ClaimTypes.Role, role),
41             }, "My_Auth");
42 
43             var principal = new ClaimsPrincipal(claimsIdentity);
44             return new AuthenticationTicket(principal, _scheme.Name);
45         }
46 
47         /// <summary>
48         /// 权限不足时的处理
49         /// </summary>
50         public Task ForbidAsync(AuthenticationProperties properties)
51         {
52             _context.Response.StatusCode = (int)HttpStatusCode.Forbidden;
53             return Task.CompletedTask;
54         }
55 
56         /// <summary>
57         /// 未登录时的处理
58         /// </summary>
59         public Task ChallengeAsync(AuthenticationProperties properties)
60         {
61             _context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
62             return Task.CompletedTask;
63         }
64     }

View Code