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<?php
namespace OAuth2\GrantType;
use OAuth2\Storage\RefreshTokenInterface;
use OAuth2\ResponseType\AccessTokenInterface;
use OAuth2\RequestInterface;
use OAuth2\ResponseInterface;
/**
*
* @author Brent Shaffer <bshafs at gmail dot com>
*/
class RefreshToken implements GrantTypeInterface
{
private $refreshToken;
protected $storage;
protected $config;
/**
* @param OAuth2\Storage\RefreshTokenInterface $storage REQUIRED Storage class for retrieving refresh token information
* @param array $config OPTIONAL Configuration options for the server
* <code>
* $config = array(
* 'always_issue_new_refresh_token' => true, // whether to issue a new refresh token upon successful token request
* 'unset_refresh_token_after_use' => true // whether to unset the refresh token after after using
* );
* </code>
*/
public function __construct(RefreshTokenInterface $storage, $config = array())
{
$this->config = array_merge(array(
'always_issue_new_refresh_token' => false,
'unset_refresh_token_after_use' => true
), $config);
// to preserve B.C. with v1.6
// @see https://github.com/bshaffer/oauth2-server-php/pull/580
// @todo - remove in v2.0
if (isset($config['always_issue_new_refresh_token']) && !isset($config['unset_refresh_token_after_use'])) {
$this->config['unset_refresh_token_after_use'] = $config['always_issue_new_refresh_token'];
}
$this->storage = $storage;
}
public function getQuerystringIdentifier()
{
return 'refresh_token';
}
public function validateRequest(RequestInterface $request, ResponseInterface $response)
{
if (!$request->request("refresh_token")) {
$response->setError(400, 'invalid_request', 'Missing parameter: "refresh_token" is required');
return null;
}
if (!$refreshToken = $this->storage->getRefreshToken($request->request("refresh_token"))) {
$response->setError(400, 'invalid_grant', 'Invalid refresh token');
return null;
}
if ($refreshToken['expires'] > 0 && $refreshToken["expires"] < time()) {
$response->setError(400, 'invalid_grant', 'Refresh token has expired');
return null;
}
// store the refresh token locally so we can delete it when a new refresh token is generated
$this->refreshToken = $refreshToken;
return true;
}
public function getClientId()
{
return $this->refreshToken['client_id'];
}
public function getUserId()
{
return isset($this->refreshToken['user_id']) ? $this->refreshToken['user_id'] : null;
}
public function getScope()
{
return isset($this->refreshToken['scope']) ? $this->refreshToken['scope'] : null;
}
public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
{
/*
* It is optional to force a new refresh token when a refresh token is used.
* However, if a new refresh token is issued, the old one MUST be expired
* @see http://tools.ietf.org/html/rfc6749#section-6
*/
$issueNewRefreshToken = $this->config['always_issue_new_refresh_token'];
$unsetRefreshToken = $this->config['unset_refresh_token_after_use'];
$token = $accessToken->createAccessToken($client_id, $user_id, $scope, $issueNewRefreshToken);
if ($unsetRefreshToken) {
$this->storage->unsetRefreshToken($this->refreshToken['refresh_token']);
}
return $token;
}
}
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