Laravel Passport Get Client ID By Access Token

Question

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',
        \Laravel\Passport\Http\Middleware\CheckClientCredentials::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 1

public function handle($request, Closure $next, $scope)
{
    if (!empty($scope)) {
        $psr      = (new DiactorosFactory)->createRequest($request);
        $psr      = $this->server->validateAuthenticatedRequest($psr);
        $clientId = $psr->getAttribute('oauth_client_id');
        $request['oauth_client_id'] = intval($clientId);
       }

    return $next($request);
}

put above to your middleware file, then you can access client_id by request()->oauth_client_id

Answer 2

I use this, to access the authenticated client app...

$bearerToken = $request->bearerToken();
$tokenId = (new \Lcobucci\JWT\Parser())->parse($bearerToken)->getHeader('jti');
$client = \Laravel\Passport\Token::find($tokenId)->client;

$client_id = $client->id;
$client_secret = $client->secret;

Source

Answer 3

There is a tricky method. You can modify the method of handle in the middleware CheckClientCredentials, just add this line.

        $request["oauth_client_id"] = $psr->getAttribute('oauth_client_id');

Then you can get client_id in controller's function:

public function info(\Illuminate\Http\Request $request)
{
    var_dump($request->oauth_client_id);
}

Answer 4

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 Symfony\Request instance which is under processing.

My final output like this:

<?php

namespace App\Http\Middleware;

use Request;

use Closure;

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


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

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $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',
        \App\Http\Middleware\AddAccessTokenHeader::class,
        \Laravel\Passport\Http\Middleware\CheckClientCredentials::class
    ],
];

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

Answer 5

The OAuth token and client information are stored as a protected variable in the Laravel\Passport\HasApiTokens trait (which you add to your User model).

So simply add a getter method to your User model to expose the OAuth information:

public function get_oauth_client(){
  return $this->accessToken->client;
}

This will return an Eloquent model for the oauth_clients table

Answer 6

I dug into CheckClientCredentials class and extracted what I needed to get the client_id from the token. aud claim is where the client_id is stored.

<?php
    Route::middleware('client')->group(function() {
        Route::get('/client-id', function (Request $request) {
            $jwt = trim(preg_replace('/^(?:\s+)?Bearer\s/', '', $request->header('authorization')));
            $token = (new \Lcobucci\JWT\Parser())->parse($jwt);

            return ['client_id' => $token->getClaim('aud')];
        });
    });

Few places to refactor this to in order to easily access but that will be up to your application