Stateless Authentication with Xano (JWE/JWS)

In modern web and mobile applications, stateless authentication is a popular approach to secure communication between clients and servers. Xano, a no-code platform for building backend services, provides a powerful and flexible way to implement stateless authentication using tokens. In this guide, we'll walk through the process of creating authentication tokens, using them to secure endpoints, and understanding the benefits of Xano's built-in authentication features.

Step 1: Create an Authentication Token

The first step in implementing stateless authentication is to generate an authentication token for a specific user. In Xano, you can create an authentication token using the security.createAuthenticationToken function.

Here's how you can do it:

1. Identify the user for whom you want to generate the token. In this example, we'll use the user's email address to fetch their record from the user table:

var email = "user@example.com";
var user = data.getUserByEmail(email);

2. Create the authentication token using the security.createAuthenticationToken function, passing in the user's ID and any additional metadata (known as "extras") you want to include in the token:

var token = security.createAuthenticationToken(user.id, {
 role: "admin",
 expiration: "1h" // Token will expire in 1 hour
});

The createAuthenticationToken function generates a JSON Web Encryption (JWE) token, which is a secure and industry-standard way of transmitting data between parties. The token includes the user's ID and any additional metadata you specified.

Step 2: Use the Authentication Token to Secure Endpoints

Once you have an authentication token, you can use it to secure your endpoints by enabling user authentication. Xano makes this process straightforward with its built-in authentication enforcement mechanisms.

Here's how you can secure an endpoint with the generated token:

1. Create an endpoint that you want to secure. For example, let's create an endpoint that returns a random number:

var randomNumber = math.random();
return randomNumber;

2. Enable user authentication for this endpoint by setting the userAuthentication property to true:

userAuthentication = true;

3. Test the endpoint by passing the authentication token in the Authorization header of your HTTP request. You can use tools like Postman or curl for this purpose.

If the token is valid, the endpoint will return the random number. If the token is invalid or missing, Xano will automatically throw an error, preventing unauthorized access to the endpoint.

Benefits of Xano's Built-in Authentication Features

While Xano provides the flexibility to use custom JSON Web Tokens (JWT) and manage your own keys, the built-in authentication token feature offers several advantages:

1. Simplified Enforcement: Xano automatically enforces the presence of a valid authentication token for secured endpoints, saving you from having to manually decode and validate tokens.

2. Expiration and Metadata Support: You can easily set token expiration times and include additional metadata (extras) within the token, without having to manage these details manually.

3. Secure by Default: Xano's authentication tokens are JWE tokens, which provide encryption in addition to signing, enhancing the security of your application.

4. Integration with Xano Services: Xano's authentication tokens seamlessly integrate with other Xano services, such as email and password authentication, making it easier to manage user authentication and authorization across your application.

By leveraging Xano's built-in authentication features, you can streamline the process of implementing stateless authentication, while still maintaining the flexibility to use custom JWT implementations if needed.

In conclusion, Xano's support for stateless authentication with tokens provides a powerful and secure way to protect your backend services, enabling you to build robust and scalable web and mobile applications with ease.