Set Up an OAuth2 Server Using Passport in Laravel

In this article, we’re going to explore how you could set up a fully fledged OAuth2 server in Laravel using the Laravel Passport library. We’ll go through the necessary server configurations along with a real-world example to demonstrate how you could consume OAuth2 APIs.

I assume that you’re familiar with the basic OAuth2 concepts and flow as we’re going to discuss them in the context of Laravel. In fact, the Laravel Passport library makes it pretty easy to quickly set up an OAuth2 server in your application. Thus, other third-party applications are able to consume APIs provided by your application.

In the first half of the article, we’ll install and configure the necessary libraries, and the second half goes through how to set up demo resources in your application and consume them from third-party applications.

Server Configurations

In this section, we’re going to install the dependencies that are required in order to make the Passport library work with Laravel. After installation, there’s quite a bit of configuration that we’ll need to go through so that Laravel can detect the Passport library.

Let’s go ahead and install the Passport library using composer.

That’s pretty much it as far as the Passport library installation is concerned. Now let’s make sure that Laravel knows about it.

Working with Laravel, you’re probably aware of the concept of a service provider that allows you to configure services in your application. Thus, whenever you want to enable a new service in your Laravel application, you just need to add an associated service provider entry in the config/app.php.

If you’re not aware of Laravel service providers yet, I would strongly recommend that you do yourself a favor and go through this introductory article that explains the basics of service providers in Laravel.

In our case, we just need to add the PassportServiceProvider provider to the list of service providers in config/app.php as shown in the following snippet.

Next, we need to run the migrate artisan command, which creates the necessary tables in a database for the Passport library.

To be precise, it creates following the tables in the database.

Next, we need to generate a pair of public and private keys that will be used by the Passport library for encryption. As expected, the Passport library provides an artisan command to create it easily.

That should have created keys at storage/oauth-public.key and storage/oauth-private.key. It also creates some demo client credentials that we’ll get back to later.

Moving ahead, let’s oauthify the existing User model class that Laravel uses for authentication. To do that, we need to add the HasApiTokens trait to the User model class. Let’s do that as shown in the following snippet.

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