README

A wrapper for implementing an OAuth2 Server(https://github.com/bshaffer/oauth2-server-php). This is a fork of https://github.com/Filsh/yii2-oauth2-server. I decided to fork it after a long standing issue of branches not being resolved at original repo. There is no guarantee that the two will remain compartible so check out things to see if there is anything broke while transiting.

Installation

The preferred way to install this extension is through composer.

Either run

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

or add

"hosannahighertech/yii2-oauth2-server": "1.0.*"

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  ]  ]  ] ]

Configure User class

common\models\User - user model implementing an interface \OAuth2\Storage\UserCredentialsInterface, so the oauth2 credentials data stored in user table. Make sure you implement:

1. public function checkUserCredentials($username, $password) which Checks the supplied username and password for validity and returns TRUE if the username and password are valid, and FALSE if it isn't.

2. public function getUserDetails($username) which returns array of the associated "user_id" and optional "scope" values something like this:

[   "user_id" => USER_ID, // REQUIRED user_id to be stored with the authorization code or access token  "scope" => SCOPE // OPTIONAL space-separated list of restricted scopes ]  

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/hosannahighertech/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/

/**  * 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();  } }

For More on Requests and responses as well as explanations for Oauth Grant types see excellet tutorial by Jenkov here: http://tutorials.jenkov.com/oauth2/

see more

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

JWT Tokens

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' => 'OAuth2\Storage\JwtAccessToken' which implements JwtAccessTokenInterface.php. The Oauth2 base library provides the default access_token which works great. Just use it and everything will be fine.

Here is a sample class for public key implementing PublickKeyInterface. Make sure that paths to private and public keys are correct. You can generate them with OpenSSL tool with two steps (Thanks to (Rietta)[https://rietta.com/blog/2012/01/27/openssl-generating-rsa-key-from-command/]):

1. openssl genrsa -des3 -out privkey.pem 2048

2. openssl rsa -in privkey.pem -outform PEM -pubout -out pubkey.pem

Note that you can copy contents of the files and paste the long strings in class variables. It is nasty but it works fine if that is what you want.

<?php namespace app\security\storage;  class PublicKeyStorage implements \OAuth2\Storage\PublicKeyInterface{    private $pbk = null;  private $pvk = null;    public function __construct()  {  $pvkText = file_get_contents(dirname(__FILE__).'/../keys/privkey.pem');   $this->pvk = openssl_get_privatekey($pvkText, 'YOUR_PASSPHRASE_IF_ANY');    $this->pbk = file_get_contents(dirname(__FILE__).'/../keys/pubkey.pem');   }   public function getPublicKey($client_id = null){   return $this->pbk;  }   public function getPrivateKey($client_id = null){  return $this->pvk;  }   public function getEncryptionAlgorithm($client_id = null){  return "RS256";  }  } 

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