In the Server app, register the Profile Service in Startup.ConfigureServices: In the Client app, component authorization approaches are functional at this point. The factory creates an individual role claim for each of the user's roles. In that class, we call the AddApiAuthorization method to add the authentication support for the Blazor client application: Also, the app configures the HttpClient to include access tokens when making requests to the API: At this point, we can test our application. Consequently, a set of conventions and configuration options is provided that we consider a good starting point. Select Finish. If troubleshooting a certificate loading problem, execute the following command in an Azure portal Kudu PowerShell command shell. Blazor provides you with two ways to run your Web client application: Blazor Server and Blazor WebAssembly. The presence of the attribute in the Client app doesn't prevent the API on the server from being called without proper credentials. How to Authenticate a Blazor WebAssembly-Hosted App with Azure AD Silambarasan Ilango January 18, 2021 2 Comments Hello, folks! Use a browser for testing that you can configure to delete all cookie and site data each time the browser is closed. The App component (App.razor) is similar to the App component found in Blazor Server apps: With the release of ASP.NET Core 5.0.1 and for any additional 5.x releases, the Router component includes the PreferExactMatches parameter set to @true. Here, we modify the LogOutSucceded component by calling the CustomLoggedOut component that is going to show us a different logout message with the link to the Login page: Next to the LogOutSucceeded component, we can find LoggingIn, CompletingLoggingIn, LogInFailed, LogOut, CompletingLogOut, LogOutFailed, UserProfile, and Registering components. Cookies and site data can persist across app updates and interfere with testing and troubleshooting. An incorrect access token scope prevents clients from accessing server web API endpoints. Prerequisites.NET Core 3.1 SDK or later; Visual Studio tool with installed ASP.NET and web development To run the application Give the certificate a Certificate Name and Subject. ( blazor-blog-series-part-3 branch) PS, The provided GitHub link takes you to the repository branch where we left off. This method configures IdentityServer for the ASP.NET Core purposes. Developer tools guidance is found in the following articles: Decode the contents of a JSON Web Token (JWT) used for authenticating a client or accessing a server web API, depending on where the problem is occurring. Debug client & server code at the same time. The helper method configures JwtBearerHandler as the default handler for requests to the app. The Identity Server configuration uses the key vault certificate via the app's My > CurrentUser certificate store. Sometimes, you must wait a short period for an App Service to restart in order for a configuration change to take effect. The Blazor application will request both an ID token to allow the user to authenticate as well as an Access token to access the WebAPI project. In Blazor WebAssembly apps, authentication checks can be bypassed because all client-side code can be modified by The default project doesnt include authentication, so to include it, we have to click the change link and choose Individual User Accounts with the Store user accounts in-app option: Once we create our application, we are going to see three projects in our solution: The Server and Client projects contain all the logic for the Authentication implementation, so lets examine them step by step. We will start off from where we left in our previous Part Blazor CRUD with Entity Framework Core Detailed Tutorial. comes from ASP.NET Core Identity. What we can see is that this method uses the ApplicationUser class to register Identity users and the ApplicationDbContext class to register EF implementation of Identity stores. The Server app also must use [Authorize] on the appropriate endpoints to correctly protect them. While creating a sample don't select any authentication check box provided on template selection(Visual Studio), here we are going to implement authentication from scratch. I'm usually using Visual Studio on Windows OS for development Blazor App, so it is very easy to create an authentication enabled Blazor WebAssembly App from the project template. The RemoteAuthenticatorView component comes from the Microsoft.AspNetCore.Components.WebAssembly.Authentication package and it properly handles different actions at each stage of authentication. For more information, see the dotnet new command in the .NET Core Guide. The JwtBearerHandler handles all other requests. Of course, for all of these to work, we must include the Microsoft.AspNetCore.Components.Authorization namespace. Of course, we can modify the Register and Login pages, but thats something we have to do on the server-side app. But we can see one additional extension method AddApiAuthorization. The first thing we are going to do is to create a new CustomLoggedOut.razor component: Then, all we have to do is to modify the Authentication.razor component: The RemoteAuthenticatorView component provides us with different components that we can modify to change the UI in certain authentication stages. Clear the following when making app code changes, user account changes with the provider, or provider app configuration changes: One approach to prevent lingering cookies and site data from interfering with testing and troubleshooting is to: A functioning app may fail immediately after upgrading either the .NET Core SDK on the development machine or changing package versions within the app. But here, this is not the case, at least there is no direct inheritance. Clear the local system's NuGet package caches by executing. In this article, we'll look at how we can take advantage of Static Web Apps Authentication in our Blazor WebAssembly apps.OverviewAzure Static Web Apps takes care of dealing with If the domain records are correct and propagated across the Internet, the portal allows you to select the Add custom domain button. Create Razor components. The Blazor UI Client is protected like any single page application. Use a custom command to open a browser in incognito or private mode in Visual Studio: To avoid having to select the browser profile for each iteration of testing with an app, set the profile as the default with the. A typical domain configuration includes: Make sure that you save the changes at your domain registrar's website correctly. The Hosting Models. To download the source code for this article, you can visit our, Using Roles in Blazor WebAssembly Hosted Applications, authentication process for the Blazor WebAssembly standalone application, Blazor WebAssembly and IdentityServer4 authentication, Authentication in Blazor WebAssembly Hosted Applications, Project Creation with Default Authentication, Server-Side Authentication in Blazor WebAssembly Hosted Applications, Client-Side Authentication in Blazor WebAssembly Hosted Applications, Customizing Components and Identity Pages, Identity implementation in the ASP.NET Core project, how to use roles with the Blazor WebAssembly Hosted authentication, IdentityServer4 UI and Web API Basic Security, SOLID Principles in C# Single Responsibility Principle, Working with Binding in Blazor Applications, Email Confirmation with ASP.NET Core Identity, Client that contains all the files for the Blazor WebAssembly client application, Server which is a hosted server project for our client-side app, How to create Blazor WebAssembly Hosted app with implemented authentication, The way that authentication works for the server and client projects, How to modify the client and server authentication UI pages. Within the Create a new Blazor app wizard, I chose No Authentication. Azure Static Web Apps is a great place to host Blazor WebAssembly apps. It enables new scenarios for .NET developers to run existing code and libraries in the browser without a plugin. Feel free to inspect all the other files to understand better what each of them is used for. Record the certificate's thumbprint, which is used in the app's configuration later. In the OidcConfigurationController (Controllers/OidcConfigurationController.cs), the client endpoint is provisioned to serve OIDC parameters. I'm trying to add a third-party API (Google) to authenticate users in a Blazor WebAssembly app. On the Configure your new Blazor WebAssembly App step, select Individual Authentication (in-app) from the Authentication drop down. Most of these issues can be fixed by following these instructions: Use of package versions incompatible with the app's target framework isn't supported. That said, lets include the Login page by right-clicking on the server project and choosing the Add/New Scaffolded Item option. App Service requires a Basic B1 or higher service tier to use custom domains. Thats because the FetchData page is protected with the @attribute [Authorize] attribute. In the following example, the certificate's common name assigned in the key vault is IdentityServerSigning, which yields a Subject of CN=IdentityServerSigning: In Visual Studio, create an Azure App Service publish profile for the Server project. Select Private Key Certificates (.pfx). Client Authentication (1.3.6.1.5.5.7.3.2), Server Authentication (1.3.6.1.5.5.7.3.1). Save the settings. Several public support forums are available to assist with troubleshooting an app. When using the template: New Project => Blazor WASM APP => Auth: Individual Authentication (in-app) selected AND ASP.NET Core Hosted selected. Basically, in this component, the AuthorizeRouteView component checks if the current user is authenticated. IdentityServer with an additional AddApiAuthorization helper method that sets up default ASP.NET Core conventions on top of IdentityServer: Authentication with an additional AddIdentityServerJwt helper method that configures the app to validate JWT tokens produced by IdentityServer: The IdentityServer middleware exposes the OpenID Connect (OIDC) endpoints: The Authentication middleware is responsible for validating request credentials and setting the user on the request context: Authorization Middleware enables authorization capabilities: Specify the issuer explicitly when deploying to Azure App Service on Linux. IdentityServer is a powerful and extensible framework for handling app security concerns. 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