How do I implement OAuth2 in an ASP.NET Core application?

How do I implement OAuth2 in an ASP.NET Core application?

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

What are the steps to configure the OAuth2 middleware?

You need to configure the middleware in the Startup.cs file. Add services for authentication in ConfigureServices and use app.UseAuthentication() in Configure.

Can you give me an example of the configuration code?

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,
        // Set your issuer and audience here
    };
});

What about handling tokens?

You can handle tokens by creating an endpoint that issues tokens after validating user credentials. Use JWT for token generation.