Laravel Passport Get Client ID By Access Token

I’m writing a tiny sms gateway to be consumed by a couple of projects,

I implemented laravel passport authentication (client credentials grant token)

Then I’ve added CheckClientCredentials to api middleware group:

protected $middlewareGroups = [
    'web' => [
       ...
    ],

    'api' => [
        'throttle:60,1',
        'bindings',
        LaravelPassportHttpMiddlewareCheckClientCredentials::class
    ],
];

The logic is working fine, now in my controller I need to get client associated with a valid token.

routes.php

Route::post('/sms', function(Request $request) {
    // save the sms along with the client id and send it

    $client_id = ''; // get the client id somehow

    sendSms($request->text, $request->to, $client_id);
});

For obvious security reasons I can never send the client id with the consumer request e.g. $client_id = $request->client_id;.

Answer

So, no answers …

I was able to resolve the issue by consuming my own API, finally I came up with simpler authentication flow, the client need to send their id & secret with each request, then I consumed my own /oauth/token route with the sent credentials, inspired by Esben Petersen blog post.

Once the access token is generated, I append it to the headers of SymfonyRequest instance which is under processing.

My final output like this:

<?php

namespace AppHttpMiddleware;

use Request;

use Closure;

class AddAccessTokenHeader
{
    /**
     * OctipusApiConsumer
     * @var ApiConsumer
     */
    private $apiConsumer;


    function __construct() {
        $this->apiConsumer  = app()->make('apiconsumer');
    }

    /**
     * Handle an incoming request.
     *
     * @param  IlluminateHttpRequest  $request
     * @param  Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $response = $this->apiConsumer->post('/oauth/token', $request->input(), [
            'content-type' => 'application/json'
        ]);


        if (!$response->isSuccessful()) {
            return response($response->getContent(), 401)
                    ->header('content-type', 'application/json');
        }

        $response = json_decode($response->getContent(), true);

        $request->headers->add([
            'Authorization'     => 'Bearer ' . $response['access_token'],
            'X-Requested-With'  => 'XMLHttpRequest'
        ]);

        return $next($request);

    }
}

I used the above middleware in conjunction with Passport’s CheckClientCredentials.

protected $middlewareGroups = [
    'web' => [
        ...
    ],

    'api' => [
        'throttle:60,1',
        'bindings',
        AppHttpMiddlewareAddAccessTokenHeader::class,
        LaravelPassportHttpMiddlewareCheckClientCredentials::class
    ],
];

This way, I was able to insure that $request->input('client_id') is reliable and can’t be faked.