Blazor uses the same security model as ASP.NET Core, which is ASP.NET Core Identity. Migrating universal providers to ASP.NET Core Identity is relatively easy, provided few customizations have been applied to the original data schema. Once the data is migrated, the use of authentication and authorization in Blazor applications is well documented, with configurable and programmatic support for most security requirements. Understanding the forms authentication workflow, enabling it in a Web application, and creating sign-in and sign-out pages are important steps in creating a ASP.NET application that supports user accounts and authenticates users through a Web page. For this reason, and because these tutorials build on each other, I encourage you to fully work on this tutorial before moving on to the next one, even if you`ve already had experience setting up forms authentication in previous projects. Note that the URL authorization mechanism (system.web/authorization element) still works. OWIN also sets ClaimIdentity in the HttpContext.Current.User property so that the URL authorization engine can see if the user is authenticated and in which roles they are. Many financial and medical websites are configured to use ssl on all pages that authenticated users can access. When you create such a Web site, you can configure the forms authentication system so that the forms authentication ticket is transmitted only over a secure connection.
In the following section, deny the anonymous user access as follows: Call the RedirectFromLoginPage method to automatically generate the forms authentication cookie and redirect the user to a corresponding page in the event cmdLogin_ServerClick: By default, the forms authentication system expects the login page to be named Login.aspx and placed in the root directory of the Web application. If you want to use a different login page URL, you can do so by specifying it in Web.config. You can find out how to do this in the following tutorial. Migrating a Web Forms ASP.NET application to Blazor almost certainly requires an authentication and authorization update, provided the application has configured authentication. This chapter describes how to migrate from a universal Web Forms provider template ASP.NET (for membership, roles, and user profiles) and how to use ASP.NET`s primary identity of Blazor applications. Although this chapter covers the general steps and considerations, you can find the detailed steps and scripts in the referenced documentation. This tutorial provided a brief overview of forms authentication. We did not examine the different configuration options, examine how cookie-free forms authentication tickets work, or how ASP.NET protects the contents of the forms authentication ticket. Then, find the item and update it to use forms authentication. After this change, the markup of your Web.config file should look like this: unless your site contains sensitive information, you just need to use SSL on the login page and on other pages where the user`s password would otherwise be sent in clear text. You don`t have to worry about securing the forms authentication ticket, as it is both encrypted and digitally signed by default (to prevent tampering). For a more detailed explanation of forms authentication ticket security, see the following tutorial.
The user agent used to log in to the website may not support cookies. In such a case, ASP.NET can use cookie-free forms authentication tickets. In this mode, the authentication ticket is encoded at the URL. In the following tutorial, we will see when cookieless authentication tickets are used and how to create and manage them. However, IIS 7 enables built-in IIS and ASP.NET pipelines. With some configuration settings, you can configure IIS 7 to call the FormsAuthenticationModule for all requests. You can also use IIS 7 to define URL authorization rules for files of any type. For more information, see Changes Between IIS6 Security and IIS7, Web Platform Security, and Understanding IIS7 URL Authorization.
Some proxies and intermediate caches on the Internet can cache web server responses that contain set-cookie headers that are then sent back to another user. Because forms-based authentication uses a cookie to authenticate users, this behavior can cause users to inadvertently (or intentionally) impersonate another user by receiving a cookie from an intermediate proxy or cache that was not originally intended for them. In short, in versions prior to IIS 7, you can only use forms authentication to protect resources processed by the ASP.NET runtime. Similarly, URL authorization rules are applied only to resources processed by the ASP.NET runtime. However, with IIS 7, it is possible to integrate formsAuthenticationModule and UrlAuthorizationModule into the IIS HTTP pipeline and extend this functionality to all requirements. Because Web.config is an XML file, it is case-sensitive. Be sure to set the view attribute to Forms with a capital “F”. If you use a different case, such as “Forms.B, you will receive a configuration error when you visit the website through a browser. This button is used to disconnect from the forms authentication session.
Assuming that the credentials provided are valid, we must create a forms authentication ticket and thus connect the user to the site. The FormsAuthentication class in the System.Web.Security namespace provides several methods for opening and disabling user logging through the forms authentication system. Although there are several methods in the FormsAuthentication class, the three that interest us at this point are: Using the ASP.NET Website, our next task is to enable forms authentication. The application authentication configuration is specified through the element in Web.config. The item contains a unique attribute named mode that specifies the authentication model used by the application. This attribute can have one of four values: The login page is responsible for determining whether the user`s credentials are valid and, in this case, creating a forms authentication ticket and redirecting the user to the page they wanted to visit. The authentication ticket is included in subsequent requests to pages on the Web site that uses formsAuthenticationModule to identify the user. Since ASP.NET 2.0, the Web Forms ASP.NET platform supports a provider model for various features, including membership. The universal membership provider, as well as the optional role provider, are typically deployed with ASP.NET Web Forms applications. It provides a robust and secure way to manage authentication and authorization that still works well today. The latest offering from these universal providers is available as a NuGet package, Microsoft.AspNet.Providers.
Every research on this topic shows how to perform these tasks with MVC, my project is based on MVP web forms. I have performed authentication, but is there a template or strategy to best perform authorization? In this tutorial, we started by looking at the forms authentication workflow, and then turned to implementing forms authentication in a ASP.NET application. Forms authentication is based on the FormsAuthenticationModule, which has two tasks: identify users based on their forms authentication ticket and redirect unauthorized users to the login page. This section shows how to add and edit the and configuration sections to configure the application ASP.NET to use forms-based authentication. GetAuthCookie is useful if you need to change the authentication ticket before writing the cookie to the Cookies collection. SetAuthCookie is useful when you want to create the forms authentication ticket and add it to the Cookies collection, but you do not want to redirect the user to the appropriate page. You can keep them on the login page or send them to another page. The element can optionally contain a child element that contains settings specific to forms authentication. First, let`s use only the default settings for forms authentication.
We will look at the element child in more detail in the next tutorial. While still responsible for authentication and authorization, ASP.NET Core Identity uses a different set of abstractions and assumptions compared to universal providers. For example, the new identity model supports third-party authentication so that users can authenticate to a social media account or other trusted authentication provider. ASP.NET Core Identity supports the user interface for frequently used pages such as login, logout, and save. It uses EF Core for data access and uses EF Core migrations to generate the schema required to support its data model. This introduction to Identity on ASP.NET Core provides a good overview of what is included in ASP.NET Core Identity and how you can start working with it. .