yii2-oauth2-server

A wrapper for implementing an OAuth2 Server(https://github.com/bshaffer/oauth2-server-php)

Installation

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist filsh/yii2-oauth2-server "*"

or add

"filsh/yii2-oauth2-server": "~2.0"

to the require section of your composer.json.

To use this extension, simply add the following code in your application configuration:

'bootstrap' => ['oauth2'],
'modules' => [
    'oauth2' => [
        'class' => 'filsh\yii2\oauth2server\Module',
        'tokenParamName' => 'accessToken',
        'tokenAccessLifetime' => 3600 * 24,
        'storageMap' => [
            'user_credentials' => 'common\models\User',
        ],
        'grantTypes' => [
            'user_credentials' => [
                'class' => 'OAuth2\GrantType\UserCredentials',
            ],
            'refresh_token' => [
                'class' => 'OAuth2\GrantType\RefreshToken',
                'always_issue_new_refresh_token' => true
            ]
        ]
    ]
]

common\models\User - user model implementing an interface \OAuth2\Storage\UserCredentialsInterface, so the oauth2 credentials data stored in user table

Additional OAuth2 Flags:

enforceState - Flag that switch that state controller should allow to use "state" param in the "Authorization Code" Grant Type

allowImplicit - Flag that switch that controller should allow the "implicit" grant type

The next step your shold run migration

yii migrate --migrationPath=@vendor/filsh/yii2-oauth2-server/migrations

this migration create the oauth2 database scheme and insert test user credentials testclient:testpass for http://fake/

add url rule to urlManager

'urlManager' => [
    'rules' => [
        'POST oauth2/<action:\w+>' => 'oauth2/rest/<action>',
        ...
    ]
]

Usage

To use this extension, simply add the behaviors for your base controller:

use yii\helpers\ArrayHelper;
use yii\filters\auth\HttpBearerAuth;
use yii\filters\auth\QueryParamAuth;
use filsh\yii2\oauth2server\filters\ErrorToExceptionFilter;
use filsh\yii2\oauth2server\filters\auth\CompositeAuth;

class Controller extends \yii\rest\Controller
{
    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return ArrayHelper::merge(parent::behaviors(), [
            'authenticator' => [
                'class' => CompositeAuth::className(),
                'authMethods' => [
                    ['class' => HttpBearerAuth::className()],
                    ['class' => QueryParamAuth::className(), 'tokenParam' => 'accessToken'],
                ]
            ],
            'exceptionFilter' => [
                'class' => ErrorToExceptionFilter::className()
            ],
        ]);
    }
}

Create action authorize in site controller for Authorization Code

https://api.mysite.com/authorize?response_type=code&client_id=TestClient&redirect_uri=https://fake/

see more

/**
 * SiteController
 */
class SiteController extends Controller
{
    /**
     * @return mixed
     */
    public function actionAuthorize()
    {
        if (Yii::$app->getUser()->getIsGuest())
            return $this->redirect('login');
    
        /** @var $module \filsh\yii2\oauth2server\Module */
        $module = Yii::$app->getModule('oauth2');
        $response = $module->handleAuthorizeRequest(!Yii::$app->getUser()->getIsGuest(), Yii::$app->getUser()->getId());
    
        /** @var object $response \OAuth2\Response */
        Yii::$app->getResponse()->format = \yii\web\Response::FORMAT_JSON;
    
        return $response->getParameters();
    }
}

Also if you set allowImplicit => true you can use Implicit Grant Type - see more

Request example:

https://api.mysite.com/authorize?response_type=token&client_id=TestClient&redirect_uri=https://fake/cb

With redirect response:

https://fake/cb#access_token=2YotnFZFEjr1zCsicMWpAA&state=xyz&token_type=bearer&expires_in=3600

If you want to get Json Web Token (JWT) instead of convetional token, you will need to set 'useJwtToken' => true in module and then define two more configurations: 'public_key' => 'app\storage\PublicKeyStorage' which is the class that implements PublickKeyInterface and 'access_token' => 'app\storage\JwtAccessToken' which implements JwtAccessTokenInterface.php

For Oauth2 base library provides the default access_token which works great except that it tries to save the token in the database. So I decided to inherit from it and override the part that tries to save (token size is too big and crashes with VARCHAR(40) in the database.

TL;DR, here are the sample classes access_token

<?php

namespace app\storage;

/**
 *
 * @author Stefano Mtangoo <mwinjilisti at gmail dot com>
 */
class JwtAccessToken extends \OAuth2\Storage\JwtAccessToken
{  
    public function setAccessToken($oauth_token, $client_id, $user_id, $expires, $scope = null)
    {
         
    }

    public function unsetAccessToken($access_token)
    {
        
    } 
}

and public_key

<?php
namespace app\storage;

class PublicKeyStorage implements \OAuth2\Storage\PublicKeyInterface{


    private $pbk =  null;
    private $pvk =  null; 
    
    public function __construct()
    {
        //files should be in same directory as this file
        //keys can be generated using OpenSSL tool with command: 
        /*
          private key:
          openssl genrsa -out privkey.pem 2048

          public key:
          openssl rsa -in privkey.pem -pubout -out pubkey.pem
        */
        $this->pbk =  file_get_contents('privkey.pem', true); 
        $this->pvk =  file_get_contents('pubkey.pem', true); 
    }

    public function getPublicKey($client_id = null){ 
        return  $this->pbk;
    }

    public function getPrivateKey($client_id = null){ 
        return  $this->pvk;
    }

    public function getEncryptionAlgorithm($client_id = null){
        return 'HS256';
    }

}

For more, see https://github.com/bshaffer/oauth2-server-php