How do I implement JWT authentication in ASP.NET Core?

How do I implement JWT authentication in ASP.NET Core?

To implement JWT authentication in ASP.NET Core, you need to configure the authentication services in your Startup.cs file.

What packages do I need to install for JWT?

You need to install the Microsoft.AspNetCore.Authentication.JwtBearer package to handle JWT authentication.

Can you show me a code example?

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,
        ValidIssuer = "yourIssuer",
        ValidAudience = "yourAudience",
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("yourSecretKey"))
    };
});

What should I do after setting up the authentication?

After setting up authentication, you can secure your API endpoints by adding the [Authorize] attribute to your controllers or actions.