ASP.NET Core Web API Security Tutorials

Securing Your ASP.NET Core Web API

This section provides a comprehensive guide to implementing robust security measures in your ASP.NET Core Web API. Learn how to protect your endpoints, manage user identities, and authorize access to your resources effectively.

Key Security Concepts

Understanding the fundamental principles of web API security is crucial. We'll cover:

Authentication: Verifying the identity of users or applications.
Authorization: Determining what authenticated users or applications are allowed to do.
HTTPS/TLS: Encrypting communication to prevent eavesdropping.
Input Validation: Preventing malicious data from being processed.
Rate Limiting: Protecting against denial-of-service attacks.

Tutorials

🔒 Implementing JWT Bearer Authentication
🛡️ Role-Based and Policy-Based Authorization
🔑 Integrating OAuth 2.0 and OpenID Connect
✅ Best Practices for Input Validation
🚦 Implementing Rate Limiting
🔧 Configuring Cross-Origin Resource Sharing (CORS)
🔒 ASP.NET Core Data Protection API

Example Snippets

Here are some common code patterns you'll encounter:

Configuring Authentication Middleware


services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.Authority = "https://your-auth-server.com/";
        options.Audience = "your-api-audience";
    });

Applying Authorization Attributes


[ApiController]
[Route("api/[controller]")]
[Authorize(Policy = "AdminOnly")]
public class AdminController : ControllerBase
{
    [HttpGet]
    public IActionResult GetAdminData()
    {
        return Ok("This is sensitive admin data.");
    }
}

Security Tip:

Always use HTTPS to encrypt all communication between clients and your API. This prevents sensitive data from being intercepted.

MSDN Documentation