自定以身份认证

自定以身份认证需要继承IIdentity与IPrincipal这两个接口来实现，这个过程是在AuthenticateRequest阶段完成的。以下过程都是模拟实现身份认证的，通过这种方式可以将ticket中保存的数据取出来用于初始化IPrincipal的实现，从而改变HttpContext.Current.User的指向的对象实例。

  <authentication mode="Forms">

            <forms loginUrl="a.html" name="andy"></forms>

        </authentication>

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 1     public class MyPrincipal : IPrincipal

 2     {

 3         public IIdentity Identity

 4         {

 5             get { return new MyIdendity("aa"); }

 6         }

 7 

 8         public bool IsInRole(string role)

 9         {

10             if (string.Compare(role, "a,b", true) == 0)

11             {

12                 return true;

13             }

14             else

15             {

16                 return false;

17             }

18         }

19     }

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 1   public class MyIdendity : IIdentity

 2     {

 3 

 4         public MyIdendity(string data)

 5         { 

 6           

 7         }

 8         public string AuthenticationType

 9         {

10             get { return "MyIdendity"; }

11         }

12 

13         public bool IsAuthenticated

14         {

15             get { return true; }

16         }

17 

18         public string Name

19         {

20             get { return "andy"; }

21         }

22     }

View Code

 1   protected void Page_Load(object sender, EventArgs e)

 2         {

 3             string userRoles = "admin,test";

 4             FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(

 5                 1,

 6                 "a",

 7                 DateTime.Now,

 8                 DateTime.Now.AddMinutes(30),

 9                 true,

10                userRoles,

11                "/"

12                 );

13             string haskTicket = FormsAuthentication.Encrypt(ticket);

14             HttpCookie userCookie = new HttpCookie(FormsAuthentication.FormsCookieName,haskTicket);

15             Response.Cookies.Add(userCookie);

16         

17         }

18 

19         protected void Button1_Click(object sender, EventArgs e)

20         {

21             var context = HttpContext.Current;

22             if (context.User.Identity is FormsIdentity)

23             {

24                 if (!(context.User is MyPrincipal))

25                 {

26                     FormsIdentity forms = (FormsIdentity)context.User.Identity;

27                     string data = forms.Ticket.UserData;

28                     MyPrincipal principal = new MyPrincipal();

29                     context.User = principal;

30                 }

31             }

32         }

33     }

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