README

laravel-passport-grant

This library provide a very simple way to add custom grant types for Laravel Passport OAuth2 server.

Installation

Note: this documentation assumes Laravel Passport installation is completed.

To get started, install package via the Composer package manager :

composer require kslimani/laravel-passport-grant

Publish the passportgrant.php configuration file using vendor:publish Artisan command :

php artisan vendor:publish --provider="Sk\Passport\GrantTypesServiceProvider" --tag="config"

Configuration

In your config/passportgrant.php configuration file, enable any custom grant types providing user provider class.

// "grants" is an array of user provider class indexed by grant type

'grants' => [
    // 'acme' => 'App\Passport\AcmeUserProvider',
],

User provider

User provider class roles are :

• validate /oauth/token request custom parameters
• provide user entity instance

User provider class must implements the Sk\Passport\UserProviderInterface :

/**
 * Validate request parameters.
 *
 * @param  \Psr\Http\Message\ServerRequestInterface  $request
 * @return void
 * @throws \League\OAuth2\Server\Exception\OAuthServerException
 */
public function validate(ServerRequestInterface $request);

/**
 * Retrieve user instance from request.
 *
 * @param  \Psr\Http\Message\ServerRequestInterface  $request
 * @return mixed|null
 */
public function retrieve(ServerRequestInterface $request);

If request validation fails, the validate() method must throw a League\OAuth2\Server\Exception\OAuthServerException invalid parameter exception.

On success, the retrieve() method must return a League\OAuth2\Server\Entities\UserEntityInterface or Illuminate\Contracts\Auth\Authenticatable instance. Otherwise null on failure.

User provider example

For convenience, the UserProvider class provide methods to validate and retrieve request custom parameters.

Therefore, creating a user provider becomes simple :

<?php

namespace App\Passport;

use App\User;
use Psr\Http\Message\ServerRequestInterface;
use Sk\Passport\UserProvider;

class AcmeUserProvider extends UserProvider
{
    /**
     * {@inheritdoc}
     */
    public function validate(ServerRequestInterface $request)
    {
        // It is not necessary to validate the "grant_type", "client_id",
        // "client_secret" and "scope" expected parameters because it is
        // already validated internally.

        $this->validateRequest($request, [
            'acme_id' => ['required', 'integer', 'min:1'],
            'acme_name' => ['required', 'string', 'min:1'],
        ]);
    }

    /**
     * {@inheritdoc}
     */
    public function retrieve(ServerRequestInterface $request)
    {
        $inputs = $this->only($request, [
            'acme_id',
            'acme_name',
        ]);

        // Here insert your logic to retrieve user entity instance

        // For example, let's assume that users table has "acme_id" column
        $user = User::where('acme_id', $inputs['acme_id'])->first();

        return $user;
    }
}

Token request example

Request an access token for "acme" grant type :

// Assuming $http is \GuzzleHttp\Client instance

$response = $http->post('https://your-app.com/oauth/token', [
    'form_params' => [
        'grant_type' => 'acme',
        'client_id' => 'client-id',
        'client_secret' => 'client-secret',
        'acme_id' => 1337,
        'acme_name' => 'Joe',
        'scope' => '',
    ],
]);

License

The MIT License (MIT). Please see License File for more information.