ASP.NET 使用 OpenId 身份验证：如果未授权，则重定向到 url

Question

我正在尝试编写一个使用混合身份验证方案的 ASP.NET 应用程序。用户可以将其用户名和密码哈希存储在 UserStore 中，也可以通过 Azure Active Directory 进行身份验证。

我已经创建了如图所示的登录表单。它有标准的 UserName 和 Password 输入，还有一个 "Login via Active Directory" 按钮。

这个效果很好。

现在问题来了：应用程序的主页有 [Authorize] 属性。

public class DefaultController : Controller
{
    [Authorize]
    public ViewResult Index()
    { 
    // Implementation
    }
}

如果用户没有登录，我希望它重定向到页面Account/Login，允许用户选择身份验证方法。

将 IAppBuilder.UseOpenIdConnectAuthentication 添加到管道设置后，它不再重定向到该页面。相反，它会直接转到 Microsoft 登录页面。

如何配置它，使 OpenID 身份验证成为系统的一部分，但允许我指定在用户未通过身份验证时如何执行重定向？

这是我设置管道的代码：

appBuilder.SetDefaultSignInAsAuthticationType(CookieAuthenticationDefaults.AuthenticationType_;
var cookieAuthenticationOptions = new CookieAuthenticationOptions
{
     AuthenticationType = DefaultAuthenticationType.ApplicationCookie,
     LoginPath = new Microsoft.Owin.PathString("/Account/Login"),
     Provider = new Security.CookieAuthenticationProvider()
};
appBuilder.UseCookieAuthentication(cookieAuthenticationOptions);
// Now the OpenId authentication
var notificationHandlers = new OpenIdConnectAuthenticationNotificationHandlers 
{
   AuthorizationCodeReceived = async(context) => {
       var jwtSecurityToken = context.JwtSecurityToken;
       // I've written a static method to convert the claims
       // to a user
       var user = await GetOrCreateUser(context.OwinContext, jwtSecurityToken.Claims);
       var signInManager = context.OwinContext.Get<SignInManager>();
       await signInManager.SignInAsync(user, true, false);
   }
}
var openIdOptions = new OpenIdConnectAuthenticationOptions
{
     ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx",
     Authority = "https://login.microsoftonline.com/xxxxx.onmicrosoft.com",
     PostLogoutRedirectUri = "https://localhost:52538/Account/Login",
     Notifications = notifcationHandlers
}
appBuilder.UseOpenIdConnectAuthentication(openIdOptions);

当您点击 "Active Directory Signin" 时，它会发布到 "Account/SignInWithOpenId"

public ActionResult SignInWithOpenId()
{
    // Send an OpenID Connect sign-in request.
    if (!Request.IsAuthenticated)
    {
        var authenticationProperties = new AuthenticationProperties
        {
            RedirectUri = "/"
        };
        HttpContext.GetOwinContext().Authentication.Challenge
        (
            authenticationProperties,
            OpenIdConnectAuthenticationDefaults.AuthenticationType
        );
        return new EmptyResult();
    }
    else
    {
        return RedirectToAction("Index", "Default");
    }
}

Answer 1

请尝试将 UseOpenIdConnectAuthentication 移动到 UseCookieAuthentication 之前，然后它将用户重定向到 "login" 页面。

// Now the OpenId authentication
var notificationHandlers = new OpenIdConnectAuthenticationNotificationHandlers 
{
  // Handler methods here
}
var openIdOptions = new OpenIdConnectAuthenticationOptions
{
     ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx",
     Authority = "https://login.microsoftonline.com/xxxxx.onmicrosoft.com",
     PostLogoutRedirectUri = "https://localhost:52538/Account/Login",
     Notifications = notifcationHandlers
}
appBuilder.UseOpenIdConnectAuthentication(openIdOptions);

appBuilder.SetDefaultSignInAsAuthticationType(CookieAuthenticationDefaults.AuthenticationType_;
var cookieAuthenticationOptions = new CookieAuthenticationOptions
{
     AuthenticationType = DefaultAuthenticationType.ApplicationCookie,
     LoginPath = new Microsoft.Owin.PathString("/Account/Login"),
     Provider = new Security.CookieAuthenticationProvider()
};
appBuilder.UseCookieAuthentication(cookieAuthenticationOptions);

请告诉我是否有帮助。

更新：

或者您可以使用自定义授权属性来覆盖默认行为，例如：

    public class CustomAuthorizeAttribute: AuthorizeAttribute
    {
        public CustomAuthorizeAttribute(): base()
        {
        }

        protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
        {
            if (filterContext.HttpContext.Request.IsAuthenticated)
            {

            }
            else
            {
                filterContext.HttpContext.Response.Redirect("Account/login");
            }              
        }
    }

然后只需将您的用法更改为：

[CustomAuthorize]
public ActionResult Index()
{
    return View();
}

Answer 2

对 IAppBuilder.UseOpenIdConnectAuthentication(...) 的调用将 Owin 中间件组件放入管道中。当 ASP.NET MVC returns 401（未经授权）的 HttpResponse 时，Owin 中间件组件会检测到这一点并将其更改为 Http 重定向（代码 302），重定向路径指向 Open Id 提供程序。

但是有一种方法可以解决这个问题：在中间件组件执行重定向之前，它会调用回调 RedirectToIdentityProvider。从这里，您可以覆盖此重定向。

这是我的代码，它覆盖了重定向，除非它来自请求路径 Account/SignInWithOpenId。

var notificationHandlers = new OpenIdConnectAuthenticationNotifications
{
    AuthorizationCodeReceived = async(context) => {
       // Sign in the user here
    },
    RedirectToIdentityProvider = (context) => {
        if(context.OwinContext.Request.Path.Value != "/Account/SignInWithOpenId")
        {
             context.OwinContext.Response.Redirect("/Account/Login");
             context.HandleResponse();
        }
        return Task.FromResult(0);
    }
}
var openIdOptions = new OpenIdConnectAuthenticationOptions
{
     ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx",
     Authority = "https://login.microsoftonline.com/xxxxx.onmicrosoft.com",
     PostLogoutRedirectUri = "https://localhost:52538/Account/Login",
     Notifications = notifcationHandlers
}
appBuilder.UseOpenIdConnectAuthentication(openIdOptions);

Answer 3

如果您将 OIDC 的身份验证模式设置为被动，它应该只响应明确的 Open ID Connect 请求（例如发布到 Account/SignInWithOpenId）：

var openIdOptions = new OpenIdConnectAuthenticationOptions
{
     // ...
     AuthenticationMode = AuthenticationMode.Passive
}

来源：The OWIN OpenID Connect Middleware

的“明确使用质询和注销”部分

ASP.NET 使用 OpenId 身份验证：如果未授权，则重定向到 url

ASP.NET with OpenIdAuthentication: redirect to url if not authorized

asp.net

asp.net-identity

azure-active-directory

openid-connect

owin-middleware