How do I implement OAuth2 in ASP.NET Core?

How do I implement OAuth2 in ASP.NET Core?

To implement OAuth2 in ASP.NET Core, you can use the Microsoft.AspNetCore.Authentication.OAuth package. First, install the package via NuGet.

What are the steps to configure it in my Startup.cs?

In your Startup.cs, you need to add the authentication services in the ConfigureServices method and configure the OAuth options.

Can you provide a code example for the configuration?

Sure! Here's a basic example:

services.AddAuthentication(options => {
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options => {
    options.TokenValidationParameters = new TokenValidationParameters {
        ValidateIssuer = true,
        ValidateAudience = true,
        ValidateLifetime = true,
        ValidateIssuerSigningKey = true,
        // Add your issuer and audience here
    };
});

What about handling tokens?

You can handle tokens by creating an endpoint that issues tokens upon successful authentication and validating them in your API.