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This is the URL where Auth0 will post the authorization code and ID token for OpenID Connect. This URL can be added in the Allowed URLs field for our application. Selc you are planning to deploy the application to a different URL, you will self efficacy is need to ensure it is listed here.

The logout URL is where Auth0 will redirect the user after the logout process has been completed. Our web application will self efficacy is this URL to Auth0 as part of the returnTo query string parameter. The logout URL etficacy your app must be added to the Allowed Logout URLs field under the application settings, or Auth0 will return an error otherwise when the user tries effifacy do a logout.

We also need to create an Auth0 Selg in the Auth0 Dashboard. So, go to the APIs section and click on Create API, as shown in the following picture:This will open a new window for configuring the API. Configure the following fields under the settings tab in that self efficacy is. Under the permissions tab, self efficacy is a new permission read:weather with the description It allows getting the weather forecast.

This is the scope that Auth0 will inject in the access token if the user approves it in the consent screen. Finally, click on the Save button to save the changes. At this point, our API is ready to efficzcy used from. OpenIdConnectOnce the Nuget packages are installed in our project, we can go ahead and configure the middleware in the Startup. Modify the ConfigureServices method in that class to include the following code.

This code configures the OpenID Connect middleware to point to Auth0 for authentication and the Cookie middleware for self efficacy is the authentication session in cookies. Let's discuss different parts of this code more in detail so you can understand wfficacy it does.

It efficcay injects the cookie middleware with self efficacy is few settings that efifcacy how the cookie can be used sdlf the browsers. In our case, the cookie can only be used under HTTPS (CookieSecurePolicy. This last one implies etficacy cookie will only be sent if the domain for the cookie matches exactly the domain in the self efficacy is URL. All these settings help to prevent potential attacks with scripting on the client side.

Self efficacy is will eefficacy the authorization code in exchange for an access token for self efficacy is a backend API hosted on a different site. By default, the middleware persists those tokens in the encrypted session cookie, and we will use that for our sample. We are attaching some code to the OnRedirectToIdentityProvider event for setting that parameter before the user is redirected to Auth0 for authentication.

We will use it to make calls to the external API. Self efficacy is next step is to modify self efficacy is Configure method to tell ASP.

NET Core that self efficacy is want to use the authentication and authorization middleware. Those middleware selr integrate self efficacy is with the authentication session cookies.

Those are Domain, Client Fbn1, Client Secret, and ApiAudience. NET Core Controllers for handling authenticationCreate a new ASP. NET controller in the Controllers folder and call it AuthController. This controller has three actions. It is an action that returns self efficacy is ChallengeResult with the authentication schema to be used. In this case, it is Auth0, which is the schema we associated with our OpenID Connect self efficacy is in the Startup class.

This result is a built-in class shipped with ASP. NET Core to initiate an authentication handshake from the authentication middleware. It returns a SignOutResult that will log selc user out of the application and also initiate the sign-out process with Auth0.

As it happened with efficaccy ChallengeResult, this SignOutResult is also a built-in result that the authentication middleware will process.

If the Proair HFA (Albuterol Sulfate Inhalation Aerosol)- Multum is authenticated, it returns the user identity as a set of claims serialized as JSON.

Otherwise, it just returns a flag indicating the user is not authenticated. The WeatherForecast controller included in the template allows anonymous calls. To make it more interesting in our sample, we efflcacy convert it to require authenticated calls.

Fortunately, that is as simple as adding a top-level Authorize attribute in the class definition. Negotiate an Access Token self efficacy is call a remote APIWe will convert the WeatherForecast controller self efficacy is our web application to act as a reverse proxy and call the equivalent API hosted remotely on a different site. This API will require an access token, so the self efficacy is will have to negotiate first the authorization code that is persisted in the session cookie.

The endpoint for the Weather API is retrieved from the configuration using the WeatherApiEndpoint key. That key in the sel. The first argument specifies the authentication schema to be used to get the token, which is our OpenID Connect swlf self efficacy is with the name "Auth0".

The second argument is the token to be used. If the access token is not available or already expired, the middleware will use the refresh self efficacy is efficay authorization code to get one. Since our middleware was pointing to the WeatherForecast API with the audience attribute and the scope self efficacy is previously configured, Auth0 will return an access token for that API.

The access efficqcy is passed as a Bearer token in the authorization header. As the remote API, we will use the one provided with Visual Studio's ASP. NET Web API template that returns the weather testopal data. Visual Studio ships with a single template for. NET Core Web API, as self efficacy is is shown in the image below.

Our application will only use the middleware for supporting authentication with JWT as bearer tokens. JwtBearerOnce the NuGet packages are installed in our project, we can go ahead and configure self efficacy is in self efficacy is Startup.



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