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php - How to use Laravel Passport with Password Grant Tokens?

I just read the https://laravel.com/docs/5.6/passport documentation and I have some doubts that hopefully someone could help me with:

First, some context, I want to use Passport as a way to provide Oauth authentication for my mobile app (first-party app).

  1. When I use php artisan passport:client --password I get back a Client ID and a Client Secret. Does this value have to be fixed on my app? for example storing them hardcoded or as a "settings" file? If the values shouldn't be stored then how should it work?

  2. To register a user to my app I use: $user->createToken('The-App')->accessToken; I get that the accessToken will be the one used for sending on all my requests as a Header (Authorization => Bearer $accessToken) but what exactly is "The-App" value for?

  3. For login the user I'm using the URL: http://example.com/oauth/token and sending as parameters:

    { "username": "[email protected]", "password": "userpassword", "grant_type": "password", "client_id": 1, // The Client ID that I got from the command (question 1) "client_secret": "Shhh" // The Client Secret that I got from the command (question 1) }

  4. When I login the user using the previous endpoint I get back a refresh_token, I read that I could refresh the token through http://example.com/oauth/token/refresh but I try to request the refresh I got Error 419, I removed the url oauth/token/refresh from the csrf verification and now I get back "message": "Unauthenticated.", I'm making the following request:

    Content-Type: x-www-form-urlencoded grant_type: refresh_token refresh_token: the-refresh-token // The Refresh Token that I got from the command (question 3) client_id: 1 // The Client ID that I got from the command (question 1) client_secret: Shhh // The Client Secret that I got from the command (question 1) scope: ''

Should I use this endpoint? or is not necessary given the app I'm trying to develop.

  1. Finally, there are a lot of endpoints that I get from passport that I don't think I will use for example: oauth/clients*, oauth/personal-access-tokens* is there a way to remove them from the endpoints published by passport?

Thanks a lot for your help!

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If you are consuming your own api then you don't need to call http://example.com/oauth/token for user login because then you need to store client_id and client_secret at app side. Better you create an api for login and there you can check the credentials and generate the personal token.

public function login(Request $request)
{
        $credentials = $request->only('email', 'password');

        if (Auth::attempt($credentials)) {
            // Authentication passed...
             $user = Auth::user();
             $token = $user->createToken('Token Name')->accessToken;

            return response()->json($token);
        }
}

Finally, there are a lot of endpoints that I get from passport that I don't think I will use for example: oauth/clients*, oauth/personal-access-tokens* is there a way to remove them from the endpoints published by passport?

You need to remove Passport::routes(); from AuthServiceProvider and manually put only required passport routes. I think you only need oauth/token route.

what exactly is "The-App" value for?

if you check oauth_access_tokens table it has name field. $user->createToken('Token Name')->accessToken; here the "Token Name" stored in name field.

How to use Laravel Passport with Password Grant Tokens?

To generate password grant token you have to store client_id and client_secret at app side (not recommended, check this ) and suppose if you have to reset the client_secret then the old version app stop working, these are the problems. To generate password grant token you have to call this api like you mention in step 3.

$http = new GuzzleHttpClient;

$response = $http->post('http://your-app.com/oauth/token', [
    'form_params' => [
        'grant_type' => 'password',
        'client_id' => 'client-id',
        'client_secret' => 'client-secret',
        'username' => '[email protected]',
        'password' => 'my-password',
        'scope' => '',
    ],
]);

return json_decode((string) $response->getBody(), true);

Generate token from refresh_token

$http = new GuzzleHttpClient;

$response = $http->post('http://your-app.com/oauth/token', [
    'form_params' => [
        'grant_type' => 'refresh_token',
        'refresh_token' => 'the-refresh-token',
        'client_id' => 'client-id',
        'client_secret' => 'client-secret',
        'scope' => '',
    ],
]);

return json_decode((string) $response->getBody(), true);

You can look this https://laravel.com/docs/5.6/passport#implicit-grant-tokens too.


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