Merge pull request #703 from dawnbreak/oauth2

:arrow_up: Update bshaffer/oauth2-server-php library.

68 files changed, 8860 insertions, 0 deletions

diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Autoloader.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Autoloader.php
new file mode 100644
index 000000000..ecfb6ba75
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Autoloader.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace OAuth2;
+
+/**
+ * Autoloads OAuth2 classes
+ *
+ * @author    Brent Shaffer <bshafs at gmail dot com>
+ * @license   MIT License
+ */
+class Autoloader
+{
+    private $dir;
+
+    public function __construct($dir = null)
+    {
+        if (is_null($dir)) {
+            $dir = dirname(__FILE__).'/..';
+        }
+        $this->dir = $dir;
+    }
+    /**
+     * Registers OAuth2\Autoloader as an SPL autoloader.
+     */
+    public static function register($dir = null)
+    {
+        ini_set('unserialize_callback_func', 'spl_autoload_call');
+        spl_autoload_register(array(new self($dir), 'autoload'));
+    }
+
+    /**
+     * Handles autoloading of classes.
+     *
+     * @param string $class A class name.
+     *
+     * @return boolean Returns true if the class has been loaded
+     */
+    public function autoload($class)
+    {
+        if (0 !== strpos($class, 'OAuth2')) {
+            return;
+        }
+
+        if (file_exists($file = $this->dir.'/'.str_replace('\\', '/', $class).'.php')) {
+            require $file;
+        }
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/ClientAssertionTypeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/ClientAssertionTypeInterface.php
new file mode 100644
index 000000000..29c7171b5
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/ClientAssertionTypeInterface.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace OAuth2\ClientAssertionType;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * Interface for all OAuth2 Client Assertion Types
+ */
+interface ClientAssertionTypeInterface
+{
+    public function validateRequest(RequestInterface $request, ResponseInterface $response);
+    public function getClientId();
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/HttpBasic.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/HttpBasic.php
new file mode 100644
index 000000000..0ecb7e18d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ClientAssertionType/HttpBasic.php
@@ -0,0 +1,123 @@
+<?php
+
+namespace OAuth2\ClientAssertionType;
+
+use OAuth2\Storage\ClientCredentialsInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * Validate a client via Http Basic authentication
+ *
+ * @author    Brent Shaffer <bshafs at gmail dot com>
+ */
+class HttpBasic implements ClientAssertionTypeInterface
+{
+    private $clientData;
+
+    protected $storage;
+    protected $config;
+
+    /**
+     * @param OAuth2\Storage\ClientCredentialsInterface $clientStorage REQUIRED Storage class for retrieving client credentials information
+     * @param array                                     $config        OPTIONAL Configuration options for the server
+     *                                                                 <code>
+     *                                                                 $config = array(
+     *                                                                 'allow_credentials_in_request_body' => true, // whether to look for credentials in the POST body in addition to the Authorize HTTP Header
+     *                                                                 'allow_public_clients'  => true              // if true, "public clients" (clients without a secret) may be authenticated
+     *                                                                 );
+     *                                                                 </code>
+     */
+    public function __construct(ClientCredentialsInterface $storage, array $config = array())
+    {
+        $this->storage = $storage;
+        $this->config = array_merge(array(
+            'allow_credentials_in_request_body' => true,
+            'allow_public_clients' => true,
+        ), $config);
+    }
+
+    public function validateRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$clientData = $this->getClientCredentials($request, $response)) {
+            return false;
+        }
+
+        if (!isset($clientData['client_id'])) {
+            throw new \LogicException('the clientData array must have "client_id" set');
+        }
+
+        if (!isset($clientData['client_secret']) || $clientData['client_secret'] == '') {
+            if (!$this->config['allow_public_clients']) {
+                $response->setError(400, 'invalid_client', 'client credentials are required');
+
+                return false;
+            }
+
+            if (!$this->storage->isPublicClient($clientData['client_id'])) {
+                $response->setError(400, 'invalid_client', 'This client is invalid or must authenticate using a client secret');
+
+                return false;
+            }
+        } elseif ($this->storage->checkClientCredentials($clientData['client_id'], $clientData['client_secret']) === false) {
+            $response->setError(400, 'invalid_client', 'The client credentials are invalid');
+
+            return false;
+        }
+
+        $this->clientData = $clientData;
+
+        return true;
+    }
+
+    public function getClientId()
+    {
+        return $this->clientData['client_id'];
+    }
+
+    /**
+     * Internal function used to get the client credentials from HTTP basic
+     * auth or POST data.
+     *
+     * According to the spec (draft 20), the client_id can be provided in
+     * the Basic Authorization header (recommended) or via GET/POST.
+     *
+     * @return
+     * A list containing the client identifier and password, for example
+     * @code
+     * return array(
+     *     "client_id"     => CLIENT_ID,        // REQUIRED the client id
+     *     "client_secret" => CLIENT_SECRET,    // OPTIONAL the client secret (may be omitted for public clients)
+     * );
+     * @endcode
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-2.3.1
+     *
+     * @ingroup oauth2_section_2
+     */
+    public function getClientCredentials(RequestInterface $request, ResponseInterface $response = null)
+    {
+        if (!is_null($request->headers('PHP_AUTH_USER')) && !is_null($request->headers('PHP_AUTH_PW'))) {
+            return array('client_id' => $request->headers('PHP_AUTH_USER'), 'client_secret' => $request->headers('PHP_AUTH_PW'));
+        }
+
+        if ($this->config['allow_credentials_in_request_body']) {
+            // Using POST for HttpBasic authorization is not recommended, but is supported by specification
+            if (!is_null($request->request('client_id'))) {
+                /**
+                 * client_secret can be null if the client's password is an empty string
+                 * @see http://tools.ietf.org/html/rfc6749#section-2.3.1
+                 */
+
+                return array('client_id' => $request->request('client_id'), 'client_secret' => $request->request('client_secret'));
+            }
+        }
+
+        if ($response) {
+            $message = $this->config['allow_credentials_in_request_body'] ? ' or body' : '';
+            $response->setError(400, 'invalid_client', 'Client credentials were not found in the headers'.$message);
+        }
+
+        return null;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeController.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeController.php
new file mode 100644
index 000000000..ea7f54a87
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeController.php
@@ -0,0 +1,393 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\Storage\ClientInterface;
+use OAuth2\ScopeInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+use OAuth2\Scope;
+
+/**
+ * @see OAuth2\Controller\AuthorizeControllerInterface
+ */
+class AuthorizeController implements AuthorizeControllerInterface
+{
+    private $scope;
+    private $state;
+    private $client_id;
+    private $redirect_uri;
+    private $response_type;
+
+    protected $clientStorage;
+    protected $responseTypes;
+    protected $config;
+    protected $scopeUtil;
+
+    /**
+     * @param OAuth2\Storage\ClientInterface $clientStorage REQUIRED Instance of OAuth2\Storage\ClientInterface to retrieve client information
+     * @param array                          $responseTypes OPTIONAL Array of OAuth2\ResponseType\ResponseTypeInterface objects.  Valid array
+     *                                                      keys are "code" and "token"
+     * @param array                          $config        OPTIONAL Configuration options for the server
+     *                                                      <code>
+     *                                                      $config = array(
+     *                                                      'allow_implicit' => false,            // if the controller should allow the "implicit" grant type
+     *                                                      'enforce_state'  => true              // if the controller should require the "state" parameter
+     *                                                      'require_exact_redirect_uri' => true, // if the controller should require an exact match on the "redirect_uri" parameter
+     *                                                      'redirect_status_code' => 302,        // HTTP status code to use for redirect responses
+     *                                                      );
+     *                                                      </code>
+     * @param OAuth2\ScopeInterface          $scopeUtil     OPTIONAL Instance of OAuth2\ScopeInterface to validate the requested scope
+     */
+    public function __construct(ClientInterface $clientStorage, array $responseTypes = array(), array $config = array(), ScopeInterface $scopeUtil = null)
+    {
+        $this->clientStorage = $clientStorage;
+        $this->responseTypes = $responseTypes;
+        $this->config = array_merge(array(
+            'allow_implicit' => false,
+            'enforce_state'  => true,
+            'require_exact_redirect_uri' => true,
+            'redirect_status_code' => 302,
+        ), $config);
+
+        if (is_null($scopeUtil)) {
+            $scopeUtil = new Scope();
+        }
+        $this->scopeUtil = $scopeUtil;
+    }
+
+    public function handleAuthorizeRequest(RequestInterface $request, ResponseInterface $response, $is_authorized, $user_id = null)
+    {
+        if (!is_bool($is_authorized)) {
+            throw new \InvalidArgumentException('Argument "is_authorized" must be a boolean.  This method must know if the user has granted access to the client.');
+        }
+
+        // We repeat this, because we need to re-validate. The request could be POSTed
+        // by a 3rd-party (because we are not internally enforcing NONCEs, etc)
+        if (!$this->validateAuthorizeRequest($request, $response)) {
+            return;
+        }
+
+        // If no redirect_uri is passed in the request, use client's registered one
+        if (empty($this->redirect_uri)) {
+            $clientData              = $this->clientStorage->getClientDetails($this->client_id);
+            $registered_redirect_uri = $clientData['redirect_uri'];
+        }
+
+        // the user declined access to the client's application
+        if ($is_authorized === false) {
+            $redirect_uri = $this->redirect_uri ?: $registered_redirect_uri;
+            $this->setNotAuthorizedResponse($request, $response, $redirect_uri, $user_id);
+
+            return;
+        }
+
+        // build the parameters to set in the redirect URI
+        if (!$params = $this->buildAuthorizeParameters($request, $response, $user_id)) {
+            return;
+        }
+
+        $authResult = $this->responseTypes[$this->response_type]->getAuthorizeResponse($params, $user_id);
+
+        list($redirect_uri, $uri_params) = $authResult;
+
+        if (empty($redirect_uri) && !empty($registered_redirect_uri)) {
+            $redirect_uri = $registered_redirect_uri;
+        }
+
+        $uri = $this->buildUri($redirect_uri, $uri_params);
+
+        // return redirect response
+        $response->setRedirect($this->config['redirect_status_code'], $uri);
+    }
+
+    protected function setNotAuthorizedResponse(RequestInterface $request, ResponseInterface $response, $redirect_uri, $user_id = null)
+    {
+        $error = 'access_denied';
+        $error_message = 'The user denied access to your application';
+        $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $this->state, $error, $error_message);
+    }
+
+    /*
+     * We have made this protected so this class can be extended to add/modify
+     * these parameters
+     */
+    protected function buildAuthorizeParameters($request, $response, $user_id)
+    {
+        // @TODO: we should be explicit with this in the future
+        $params = array(
+            'scope'         => $this->scope,
+            'state'         => $this->state,
+            'client_id'     => $this->client_id,
+            'redirect_uri'  => $this->redirect_uri,
+            'response_type' => $this->response_type,
+        );
+
+        return $params;
+    }
+
+    /**
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return bool
+     */
+    public function validateAuthorizeRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        // Make sure a valid client id was supplied (we can not redirect because we were unable to verify the URI)
+        if (!$client_id = $request->query('client_id', $request->request('client_id'))) {
+            // We don't have a good URI to use
+            $response->setError(400, 'invalid_client', "No client id supplied");
+
+            return false;
+        }
+
+        // Get client details
+        if (!$clientData = $this->clientStorage->getClientDetails($client_id)) {
+            $response->setError(400, 'invalid_client', 'The client id supplied is invalid');
+
+            return false;
+        }
+
+        $registered_redirect_uri = isset($clientData['redirect_uri']) ? $clientData['redirect_uri'] : '';
+
+        // Make sure a valid redirect_uri was supplied. If specified, it must match the clientData URI.
+        // @see http://tools.ietf.org/html/rfc6749#section-3.1.2
+        // @see http://tools.ietf.org/html/rfc6749#section-4.1.2.1
+        // @see http://tools.ietf.org/html/rfc6749#section-4.2.2.1
+        if ($supplied_redirect_uri = $request->query('redirect_uri', $request->request('redirect_uri'))) {
+            // validate there is no fragment supplied
+            $parts = parse_url($supplied_redirect_uri);
+            if (isset($parts['fragment']) && $parts['fragment']) {
+                $response->setError(400, 'invalid_uri', 'The redirect URI must not contain a fragment');
+
+                return false;
+            }
+
+            // validate against the registered redirect uri(s) if available
+            if ($registered_redirect_uri && !$this->validateRedirectUri($supplied_redirect_uri, $registered_redirect_uri)) {
+                $response->setError(400, 'redirect_uri_mismatch', 'The redirect URI provided is missing or does not match', '#section-3.1.2');
+
+                return false;
+            }
+            $redirect_uri = $supplied_redirect_uri;
+        } else {
+            // use the registered redirect_uri if none has been supplied, if possible
+            if (!$registered_redirect_uri) {
+                $response->setError(400, 'invalid_uri', 'No redirect URI was supplied or stored');
+
+                return false;
+            }
+
+            if (count(explode(' ', $registered_redirect_uri)) > 1) {
+                $response->setError(400, 'invalid_uri', 'A redirect URI must be supplied when multiple redirect URIs are registered', '#section-3.1.2.3');
+
+                return false;
+            }
+            $redirect_uri = $registered_redirect_uri;
+        }
+
+        // Select the redirect URI
+        $response_type = $request->query('response_type', $request->request('response_type'));
+
+        // for multiple-valued response types - make them alphabetical
+        if (false !== strpos($response_type, ' ')) {
+            $types = explode(' ', $response_type);
+            sort($types);
+            $response_type = ltrim(implode(' ', $types));
+        }
+
+        $state = $request->query('state', $request->request('state'));
+
+        // type and client_id are required
+        if (!$response_type || !in_array($response_type, $this->getValidResponseTypes())) {
+            $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'invalid_request', 'Invalid or missing response type', null);
+
+            return false;
+        }
+
+        if ($response_type == self::RESPONSE_TYPE_AUTHORIZATION_CODE) {
+            if (!isset($this->responseTypes['code'])) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'unsupported_response_type', 'authorization code grant type not supported', null);
+
+                return false;
+            }
+            if (!$this->clientStorage->checkRestrictedGrantType($client_id, 'authorization_code')) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'unauthorized_client', 'The grant type is unauthorized for this client_id', null);
+
+                return false;
+            }
+            if ($this->responseTypes['code']->enforceRedirect() && !$redirect_uri) {
+                $response->setError(400, 'redirect_uri_mismatch', 'The redirect URI is mandatory and was not supplied');
+
+                return false;
+            }
+        } else {
+            if (!$this->config['allow_implicit']) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'unsupported_response_type', 'implicit grant type not supported', null);
+
+                return false;
+            }
+            if (!$this->clientStorage->checkRestrictedGrantType($client_id, 'implicit')) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'unauthorized_client', 'The grant type is unauthorized for this client_id', null);
+
+                return false;
+            }
+        }
+
+        // validate requested scope if it exists
+        $requestedScope = $this->scopeUtil->getScopeFromRequest($request);
+
+        if ($requestedScope) {
+            // restrict scope by client specific scope if applicable,
+            // otherwise verify the scope exists
+            $clientScope = $this->clientStorage->getClientScope($client_id);
+            if ((empty($clientScope) && !$this->scopeUtil->scopeExists($requestedScope))
+                || (!empty($clientScope) && !$this->scopeUtil->checkScope($requestedScope, $clientScope))) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'invalid_scope', 'An unsupported scope was requested', null);
+
+                return false;
+            }
+        } else {
+            // use a globally-defined default scope
+            $defaultScope = $this->scopeUtil->getDefaultScope($client_id);
+
+            if (false === $defaultScope) {
+                $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $state, 'invalid_client', 'This application requires you specify a scope parameter', null);
+
+                return false;
+            }
+
+            $requestedScope = $defaultScope;
+        }
+
+        // Validate state parameter exists (if configured to enforce this)
+        if ($this->config['enforce_state'] && !$state) {
+            $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, null, 'invalid_request', 'The state parameter is required');
+
+            return false;
+        }
+
+        // save the input data and return true
+        $this->scope         = $requestedScope;
+        $this->state         = $state;
+        $this->client_id     = $client_id;
+        // Only save the SUPPLIED redirect URI (@see http://tools.ietf.org/html/rfc6749#section-4.1.3)
+        $this->redirect_uri  = $supplied_redirect_uri;
+        $this->response_type = $response_type;
+
+        return true;
+    }
+
+    /**
+     * Build the absolute URI based on supplied URI and parameters.
+     *
+     * @param $uri    An absolute URI.
+     * @param $params Parameters to be append as GET.
+     *
+     * @return
+     * An absolute URI with supplied parameters.
+     *
+     * @ingroup oauth2_section_4
+     */
+    private function buildUri($uri, $params)
+    {
+        $parse_url = parse_url($uri);
+
+        // Add our params to the parsed uri
+        foreach ($params as $k => $v) {
+            if (isset($parse_url[$k])) {
+                $parse_url[$k] .= "&" . http_build_query($v, '', '&');
+            } else {
+                $parse_url[$k] = http_build_query($v, '', '&');
+            }
+        }
+
+        // Put humpty dumpty back together
+        return
+            ((isset($parse_url["scheme"])) ? $parse_url["scheme"] . "://" : "")
+            . ((isset($parse_url["user"])) ? $parse_url["user"]
+            . ((isset($parse_url["pass"])) ? ":" . $parse_url["pass"] : "") . "@" : "")
+            . ((isset($parse_url["host"])) ? $parse_url["host"] : "")
+            . ((isset($parse_url["port"])) ? ":" . $parse_url["port"] : "")
+            . ((isset($parse_url["path"])) ? $parse_url["path"] : "")
+            . ((isset($parse_url["query"]) && !empty($parse_url['query'])) ? "?" . $parse_url["query"] : "")
+            . ((isset($parse_url["fragment"])) ? "#" . $parse_url["fragment"] : "")
+        ;
+    }
+
+    protected function getValidResponseTypes()
+    {
+        return array(
+            self::RESPONSE_TYPE_ACCESS_TOKEN,
+            self::RESPONSE_TYPE_AUTHORIZATION_CODE,
+        );
+    }
+
+    /**
+     * Internal method for validating redirect URI supplied
+     *
+     * @param string $inputUri            The submitted URI to be validated
+     * @param string $registeredUriString The allowed URI(s) to validate against.  Can be a space-delimited string of URIs to
+     *                                    allow for multiple URIs
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-3.1.2
+     */
+    protected function validateRedirectUri($inputUri, $registeredUriString)
+    {
+        if (!$inputUri || !$registeredUriString) {
+            return false; // if either one is missing, assume INVALID
+        }
+
+        $registered_uris = preg_split('/\s+/', $registeredUriString);
+        foreach ($registered_uris as $registered_uri) {
+            if ($this->config['require_exact_redirect_uri']) {
+                // the input uri is validated against the registered uri using exact match
+                if (strcmp($inputUri, $registered_uri) === 0) {
+                    return true;
+                }
+            } else {
+                $registered_uri_length = strlen($registered_uri);
+                if ($registered_uri_length === 0) {
+                    return false;
+                }
+
+                // the input uri is validated against the registered uri using case-insensitive match of the initial string
+                // i.e. additional query parameters may be applied
+                if (strcasecmp(substr($inputUri, 0, $registered_uri_length), $registered_uri) === 0) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Convenience methods to access the parameters derived from the validated request
+     */
+
+    public function getScope()
+    {
+        return $this->scope;
+    }
+
+    public function getState()
+    {
+        return $this->state;
+    }
+
+    public function getClientId()
+    {
+        return $this->client_id;
+    }
+
+    public function getRedirectUri()
+    {
+        return $this->redirect_uri;
+    }
+
+    public function getResponseType()
+    {
+        return $this->response_type;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeControllerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeControllerInterface.php
new file mode 100644
index 000000000..fa07ae8d2
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/AuthorizeControllerInterface.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *  This controller is called when a user should be authorized
+ *  by an authorization server.  As OAuth2 does not handle
+ *  authorization directly, this controller ensures the request is valid, but
+ *  requires the application to determine the value of $is_authorized
+ *
+ *  ex:
+ *  > $user_id = $this->somehowDetermineUserId();
+ *  > $is_authorized = $this->somehowDetermineUserAuthorization();
+ *  > $response = new OAuth2\Response();
+ *  > $authorizeController->handleAuthorizeRequest(
+ *  >     OAuth2\Request::createFromGlobals(),
+ *  >     $response,
+ *  >     $is_authorized,
+ *  >     $user_id);
+ *  > $response->send();
+ *
+ */
+interface AuthorizeControllerInterface
+{
+    /**
+     * List of possible authentication response types.
+     * The "authorization_code" mechanism exclusively supports 'code'
+     * and the "implicit" mechanism exclusively supports 'token'.
+     *
+     * @var string
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1.1
+     * @see http://tools.ietf.org/html/rfc6749#section-4.2.1
+     */
+    const RESPONSE_TYPE_AUTHORIZATION_CODE = 'code';
+    const RESPONSE_TYPE_ACCESS_TOKEN = 'token';
+
+    public function handleAuthorizeRequest(RequestInterface $request, ResponseInterface $response, $is_authorized, $user_id = null);
+
+    public function validateAuthorizeRequest(RequestInterface $request, ResponseInterface $response);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceController.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceController.php
new file mode 100644
index 000000000..3cfaaaf12
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceController.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\TokenType\TokenTypeInterface;
+use OAuth2\Storage\AccessTokenInterface;
+use OAuth2\ScopeInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+use OAuth2\Scope;
+
+/**
+ * @see OAuth2\Controller\ResourceControllerInterface
+ */
+class ResourceController implements ResourceControllerInterface
+{
+    private $token;
+
+    protected $tokenType;
+    protected $tokenStorage;
+    protected $config;
+    protected $scopeUtil;
+
+    public function __construct(TokenTypeInterface $tokenType, AccessTokenInterface $tokenStorage, $config = array(), ScopeInterface $scopeUtil = null)
+    {
+        $this->tokenType = $tokenType;
+        $this->tokenStorage = $tokenStorage;
+
+        $this->config = array_merge(array(
+            'www_realm' => 'Service',
+        ), $config);
+
+        if (is_null($scopeUtil)) {
+            $scopeUtil = new Scope();
+        }
+        $this->scopeUtil = $scopeUtil;
+    }
+
+    public function verifyResourceRequest(RequestInterface $request, ResponseInterface $response, $scope = null)
+    {
+        $token = $this->getAccessTokenData($request, $response);
+
+        // Check if we have token data
+        if (is_null($token)) {
+            return false;
+        }
+
+        /**
+         * Check scope, if provided
+         * If token doesn't have a scope, it's null/empty, or it's insufficient, then throw 403
+         * @see http://tools.ietf.org/html/rfc6750#section-3.1
+         */
+        if ($scope && (!isset($token["scope"]) || !$token["scope"] || !$this->scopeUtil->checkScope($scope, $token["scope"]))) {
+            $response->setError(403, 'insufficient_scope', 'The request requires higher privileges than provided by the access token');
+            $response->addHttpHeaders(array(
+                'WWW-Authenticate' => sprintf('%s realm="%s", scope="%s", error="%s", error_description="%s"',
+                    $this->tokenType->getTokenType(),
+                    $this->config['www_realm'],
+                    $scope,
+                    $response->getParameter('error'),
+                    $response->getParameter('error_description')
+                )
+            ));
+
+            return false;
+        }
+
+        // allow retrieval of the token
+        $this->token = $token;
+
+        return (bool) $token;
+    }
+
+    public function getAccessTokenData(RequestInterface $request, ResponseInterface $response)
+    {
+        // Get the token parameter
+        if ($token_param = $this->tokenType->getAccessTokenParameter($request, $response)) {
+            // Get the stored token data (from the implementing subclass)
+            // Check we have a well formed token
+            // Check token expiration (expires is a mandatory paramter)
+            if (!$token = $this->tokenStorage->getAccessToken($token_param)) {
+                $response->setError(401, 'invalid_token', 'The access token provided is invalid');
+            } elseif (!isset($token["expires"]) || !isset($token["client_id"])) {
+                $response->setError(401, 'malformed_token', 'Malformed token (missing "expires")');
+            } elseif (time() > $token["expires"]) {
+                $response->setError(401, 'invalid_token', 'The access token provided has expired');
+            } else {
+                return $token;
+            }
+        }
+
+        $authHeader = sprintf('%s realm="%s"', $this->tokenType->getTokenType(), $this->config['www_realm']);
+
+        if ($error = $response->getParameter('error')) {
+            $authHeader = sprintf('%s, error="%s"', $authHeader, $error);
+            if ($error_description = $response->getParameter('error_description')) {
+                $authHeader = sprintf('%s, error_description="%s"', $authHeader, $error_description);
+            }
+        }
+
+        $response->addHttpHeaders(array('WWW-Authenticate' => $authHeader));
+
+        return null;
+    }
+
+    // convenience method to allow retrieval of the token
+    public function getToken()
+    {
+        return $this->token;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceControllerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceControllerInterface.php
new file mode 100644
index 000000000..611421935
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/ResourceControllerInterface.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *  This controller is called when a "resource" is requested.
+ *  call verifyResourceRequest in order to determine if the request
+ *  contains a valid token.
+ *
+ *  ex:
+ *  > if (!$resourceController->verifyResourceRequest(OAuth2\Request::createFromGlobals(), $response = new OAuth2\Response())) {
+ *  >     $response->send(); // authorization failed
+ *  >     die();
+ *  > }
+ *  > return json_encode($resource); // valid token!  Send the stuff!
+ *
+ */
+interface ResourceControllerInterface
+{
+    public function verifyResourceRequest(RequestInterface $request, ResponseInterface $response, $scope = null);
+
+    public function getAccessTokenData(RequestInterface $request, ResponseInterface $response);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenController.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenController.php
new file mode 100644
index 000000000..5d2d731fe
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenController.php
@@ -0,0 +1,295 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\ClientAssertionType\ClientAssertionTypeInterface;
+use OAuth2\GrantType\GrantTypeInterface;
+use OAuth2\ScopeInterface;
+use OAuth2\Scope;
+use OAuth2\Storage\ClientInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * @see \OAuth2\Controller\TokenControllerInterface
+ */
+class TokenController implements TokenControllerInterface
+{
+    /**
+     * @var AccessTokenInterface
+     */
+    protected $accessToken;
+
+    /**
+     * @var array
+     */
+    protected $grantTypes;
+
+    /**
+     * @var ClientAssertionTypeInterface
+     */
+    protected $clientAssertionType;
+
+    /**
+     * @var Scope|ScopeInterface
+     */
+    protected $scopeUtil;
+
+    /**
+     * @var ClientInterface
+     */
+    protected $clientStorage;
+
+    public function __construct(AccessTokenInterface $accessToken, ClientInterface $clientStorage, array $grantTypes = array(), ClientAssertionTypeInterface $clientAssertionType = null, ScopeInterface $scopeUtil = null)
+    {
+        if (is_null($clientAssertionType)) {
+            foreach ($grantTypes as $grantType) {
+                if (!$grantType instanceof ClientAssertionTypeInterface) {
+                    throw new \InvalidArgumentException('You must supply an instance of OAuth2\ClientAssertionType\ClientAssertionTypeInterface or only use grant types which implement OAuth2\ClientAssertionType\ClientAssertionTypeInterface');
+                }
+            }
+        }
+        $this->clientAssertionType = $clientAssertionType;
+        $this->accessToken = $accessToken;
+        $this->clientStorage = $clientStorage;
+        foreach ($grantTypes as $grantType) {
+            $this->addGrantType($grantType);
+        }
+
+        if (is_null($scopeUtil)) {
+            $scopeUtil = new Scope();
+        }
+        $this->scopeUtil = $scopeUtil;
+    }
+
+    public function handleTokenRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if ($token = $this->grantAccessToken($request, $response)) {
+            // @see http://tools.ietf.org/html/rfc6749#section-5.1
+            // server MUST disable caching in headers when tokens are involved
+            $response->setStatusCode(200);
+            $response->addParameters($token);
+            $response->addHttpHeaders(array(
+                'Cache-Control' => 'no-store',
+                'Pragma' => 'no-cache',
+                'Content-Type' => 'application/json'
+            ));
+        }
+    }
+
+    /**
+     * Grant or deny a requested access token.
+     * This would be called from the "/token" endpoint as defined in the spec.
+     * You can call your endpoint whatever you want.
+     *
+     * @param RequestInterface $request Request object to grant access token
+     * @param ResponseInterface $response
+     *
+     * @throws \InvalidArgumentException
+     * @throws \LogicException
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @see http://tools.ietf.org/html/rfc6749#section-10.6
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1.3
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function grantAccessToken(RequestInterface $request, ResponseInterface $response)
+    {
+        if (strtolower($request->server('REQUEST_METHOD')) != 'post') {
+            $response->setError(405, 'invalid_request', 'The request method must be POST when requesting an access token', '#section-3.2');
+            $response->addHttpHeaders(array('Allow' => 'POST'));
+
+            return null;
+        }
+
+        /**
+         * Determine grant type from request
+         * and validate the request for that grant type
+         */
+        if (!$grantTypeIdentifier = $request->request('grant_type')) {
+            $response->setError(400, 'invalid_request', 'The grant type was not specified in the request');
+
+            return null;
+        }
+
+        if (!isset($this->grantTypes[$grantTypeIdentifier])) {
+            /* TODO: If this is an OAuth2 supported grant type that we have chosen not to implement, throw a 501 Not Implemented instead */
+            $response->setError(400, 'unsupported_grant_type', sprintf('Grant type "%s" not supported', $grantTypeIdentifier));
+
+            return null;
+        }
+
+        $grantType = $this->grantTypes[$grantTypeIdentifier];
+
+        /**
+         * Retrieve the client information from the request
+         * ClientAssertionTypes allow for grant types which also assert the client data
+         * in which case ClientAssertion is handled in the validateRequest method
+         *
+         * @see OAuth2\GrantType\JWTBearer
+         * @see OAuth2\GrantType\ClientCredentials
+         */
+        if (!$grantType instanceof ClientAssertionTypeInterface) {
+            if (!$this->clientAssertionType->validateRequest($request, $response)) {
+                return null;
+            }
+            $clientId = $this->clientAssertionType->getClientId();
+        }
+
+        /**
+         * Retrieve the grant type information from the request
+         * The GrantTypeInterface object handles all validation
+         * If the object is an instance of ClientAssertionTypeInterface,
+         * That logic is handled here as well
+         */
+        if (!$grantType->validateRequest($request, $response)) {
+            return null;
+        }
+
+        if ($grantType instanceof ClientAssertionTypeInterface) {
+            $clientId = $grantType->getClientId();
+        } else {
+            // validate the Client ID (if applicable)
+            if (!is_null($storedClientId = $grantType->getClientId()) && $storedClientId != $clientId) {
+                $response->setError(400, 'invalid_grant', sprintf('%s doesn\'t exist or is invalid for the client', $grantTypeIdentifier));
+
+                return null;
+            }
+        }
+
+        /**
+         * Validate the client can use the requested grant type
+         */
+        if (!$this->clientStorage->checkRestrictedGrantType($clientId, $grantTypeIdentifier)) {
+            $response->setError(400, 'unauthorized_client', 'The grant type is unauthorized for this client_id');
+
+            return false;
+        }
+
+        /**
+         * Validate the scope of the token
+         *
+         * requestedScope - the scope specified in the token request
+         * availableScope - the scope associated with the grant type
+         *  ex: in the case of the "Authorization Code" grant type,
+         *  the scope is specified in the authorize request
+         *
+         * @see http://tools.ietf.org/html/rfc6749#section-3.3
+         */
+
+        $requestedScope = $this->scopeUtil->getScopeFromRequest($request);
+        $availableScope = $grantType->getScope();
+
+        if ($requestedScope) {
+            // validate the requested scope
+            if ($availableScope) {
+                if (!$this->scopeUtil->checkScope($requestedScope, $availableScope)) {
+                    $response->setError(400, 'invalid_scope', 'The scope requested is invalid for this request');
+
+                    return null;
+                }
+            } else {
+                // validate the client has access to this scope
+                if ($clientScope = $this->clientStorage->getClientScope($clientId)) {
+                    if (!$this->scopeUtil->checkScope($requestedScope, $clientScope)) {
+                        $response->setError(400, 'invalid_scope', 'The scope requested is invalid for this client');
+
+                        return false;
+                    }
+                } elseif (!$this->scopeUtil->scopeExists($requestedScope)) {
+                    $response->setError(400, 'invalid_scope', 'An unsupported scope was requested');
+
+                    return null;
+                }
+            }
+        } elseif ($availableScope) {
+            // use the scope associated with this grant type
+            $requestedScope = $availableScope;
+        } else {
+            // use a globally-defined default scope
+            $defaultScope = $this->scopeUtil->getDefaultScope($clientId);
+
+            // "false" means default scopes are not allowed
+            if (false === $defaultScope) {
+                $response->setError(400, 'invalid_scope', 'This application requires you specify a scope parameter');
+
+                return null;
+            }
+
+            $requestedScope = $defaultScope;
+        }
+
+        return $grantType->createAccessToken($this->accessToken, $clientId, $grantType->getUserId(), $requestedScope);
+    }
+
+    /**
+     * addGrantType
+     *
+     * @param GrantTypeInterface $grantType the grant type to add for the specified identifier
+     * @param string $identifier a string passed in as "grant_type" in the response that will call this grantType
+     */
+    public function addGrantType(GrantTypeInterface $grantType, $identifier = null)
+    {
+        if (is_null($identifier) || is_numeric($identifier)) {
+            $identifier = $grantType->getQuerystringIdentifier();
+        }
+
+        $this->grantTypes[$identifier] = $grantType;
+    }
+
+    public function handleRevokeRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if ($this->revokeToken($request, $response)) {
+            $response->setStatusCode(200);
+            $response->addParameters(array('revoked' => true));
+        }
+    }
+
+    /**
+     * Revoke a refresh or access token. Returns true on success and when tokens are invalid
+     *
+     * Note: invalid tokens do not cause an error response since the client
+     * cannot handle such an error in a reasonable way.  Moreover, the
+     * purpose of the revocation request, invalidating the particular token,
+     * is already achieved.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return bool|null
+     */
+    public function revokeToken(RequestInterface $request, ResponseInterface $response)
+    {
+        if (strtolower($request->server('REQUEST_METHOD')) != 'post') {
+            $response->setError(405, 'invalid_request', 'The request method must be POST when revoking an access token', '#section-3.2');
+            $response->addHttpHeaders(array('Allow' => 'POST'));
+
+            return null;
+        }
+
+        $token_type_hint = $request->request('token_type_hint');
+        if (!in_array($token_type_hint, array(null, 'access_token', 'refresh_token'), true)) {
+            $response->setError(400, 'invalid_request', 'Token type hint must be either \'access_token\' or \'refresh_token\'');
+
+            return null;
+        }
+
+        $token = $request->request('token');
+        if ($token === null) {
+            $response->setError(400, 'invalid_request', 'Missing token parameter to revoke');
+
+            return null;
+        }
+
+        // @todo remove this check for v2.0
+        if (!method_exists($this->accessToken, 'revokeToken')) {
+            $class = get_class($this->accessToken);
+            throw new \RuntimeException("AccessToken {$class} does not implement required revokeToken method");
+        }
+
+        $this->accessToken->revokeToken($token, $token_type_hint);
+
+        return true;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenControllerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenControllerInterface.php
new file mode 100644
index 000000000..72d72570f
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Controller/TokenControllerInterface.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace OAuth2\Controller;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *  This controller is called when a token is being requested.
+ *  it is called to handle all grant types the application supports.
+ *  It also validates the client's credentials
+ *
+ *  ex:
+ *  > $tokenController->handleTokenRequest(OAuth2\Request::createFromGlobals(), $response = new OAuth2\Response());
+ *  > $response->send();
+ *
+ */
+interface TokenControllerInterface
+{
+    /**
+     * handleTokenRequest
+     *
+     * @param $request
+     * OAuth2\RequestInterface - The current http request
+     * @param $response
+     * OAuth2\ResponseInterface - An instance of OAuth2\ResponseInterface to contain the response data
+     *
+     */
+    public function handleTokenRequest(RequestInterface $request, ResponseInterface $response);
+
+    public function grantAccessToken(RequestInterface $request, ResponseInterface $response);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/EncryptionInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/EncryptionInterface.php
new file mode 100644
index 000000000..2d336c664
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/EncryptionInterface.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace OAuth2\Encryption;
+
+interface EncryptionInterface
+{
+    public function encode($payload, $key, $algorithm = null);
+    public function decode($payload, $key, $algorithm = null);
+    public function urlSafeB64Encode($data);
+    public function urlSafeB64Decode($b64);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/FirebaseJwt.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/FirebaseJwt.php
new file mode 100644
index 000000000..1b527e0a0
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/FirebaseJwt.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace OAuth2\Encryption;
+
+/**
+ * Bridge file to use the firebase/php-jwt package for JWT encoding and decoding.
+ * @author Francis Chuang <francis.chuang@gmail.com>
+ */
+class FirebaseJwt implements EncryptionInterface
+{
+    public function __construct()
+    {
+        if (!class_exists('\JWT')) {
+            throw new \ErrorException('firebase/php-jwt must be installed to use this feature. You can do this by running "composer require firebase/php-jwt"');
+        }
+    }
+
+    public function encode($payload, $key, $alg = 'HS256', $keyId = null)
+    {
+        return \JWT::encode($payload, $key, $alg, $keyId);
+    }
+
+    public function decode($jwt, $key = null, $allowedAlgorithms = null)
+    {
+        try {
+
+            //Maintain BC: Do not verify if no algorithms are passed in.
+            if (!$allowedAlgorithms) {
+                $key = null;
+            }
+
+            return (array)\JWT::decode($jwt, $key, $allowedAlgorithms);
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+
+    public function urlSafeB64Encode($data)
+    {
+        return \JWT::urlsafeB64Encode($data);
+    }
+
+    public function urlSafeB64Decode($b64)
+    {
+        return \JWT::urlsafeB64Decode($b64);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php
new file mode 100644
index 000000000..ee576e643
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php
@@ -0,0 +1,173 @@
+<?php
+
+namespace OAuth2\Encryption;
+
+/**
+ * @link https://github.com/F21/jwt
+ * @author F21
+ */
+class Jwt implements EncryptionInterface
+{
+    public function encode($payload, $key, $algo = 'HS256')
+    {
+        $header = $this->generateJwtHeader($payload, $algo);
+
+        $segments = array(
+            $this->urlSafeB64Encode(json_encode($header)),
+            $this->urlSafeB64Encode(json_encode($payload))
+        );
+
+        $signing_input = implode('.', $segments);
+
+        $signature = $this->sign($signing_input, $key, $algo);
+        $segments[] = $this->urlsafeB64Encode($signature);
+
+        return implode('.', $segments);
+    }
+
+    public function decode($jwt, $key = null, $allowedAlgorithms = true)
+    {
+        if (!strpos($jwt, '.')) {
+            return false;
+        }
+
+        $tks = explode('.', $jwt);
+
+        if (count($tks) != 3) {
+            return false;
+        }
+
+        list($headb64, $payloadb64, $cryptob64) = $tks;
+
+        if (null === ($header = json_decode($this->urlSafeB64Decode($headb64), true))) {
+            return false;
+        }
+
+        if (null === $payload = json_decode($this->urlSafeB64Decode($payloadb64), true)) {
+            return false;
+        }
+
+        $sig = $this->urlSafeB64Decode($cryptob64);
+
+        if ((bool) $allowedAlgorithms) {
+            if (!isset($header['alg'])) {
+                return false;
+            }
+
+            // check if bool arg supplied here to maintain BC
+            if (is_array($allowedAlgorithms) && !in_array($header['alg'], $allowedAlgorithms)) {
+                return false;
+            }
+
+            if (!$this->verifySignature($sig, "$headb64.$payloadb64", $key, $header['alg'])) {
+                return false;
+            }
+        }
+
+        return $payload;
+    }
+
+    private function verifySignature($signature, $input, $key, $algo = 'HS256')
+    {
+        // use constants when possible, for HipHop support
+        switch ($algo) {
+            case'HS256':
+            case'HS384':
+            case'HS512':
+                return $this->hash_equals(
+                    $this->sign($input, $key, $algo),
+                    $signature
+                );
+
+            case 'RS256':
+                return openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA256') ? OPENSSL_ALGO_SHA256 : 'sha256')  === 1;
+
+            case 'RS384':
+                return @openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'sha384') === 1;
+
+            case 'RS512':
+                return @openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA512') ? OPENSSL_ALGO_SHA512 : 'sha512') === 1;
+
+            default:
+                throw new \InvalidArgumentException("Unsupported or invalid signing algorithm.");
+        }
+    }
+
+    private function sign($input, $key, $algo = 'HS256')
+    {
+        switch ($algo) {
+            case 'HS256':
+                return hash_hmac('sha256', $input, $key, true);
+
+            case 'HS384':
+                return hash_hmac('sha384', $input, $key, true);
+
+            case 'HS512':
+                return hash_hmac('sha512', $input, $key, true);
+
+            case 'RS256':
+                return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA256') ? OPENSSL_ALGO_SHA256 : 'sha256');
+
+            case 'RS384':
+                return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'sha384');
+
+            case 'RS512':
+                return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA512') ? OPENSSL_ALGO_SHA512 : 'sha512');
+
+            default:
+                throw new \Exception("Unsupported or invalid signing algorithm.");
+        }
+    }
+
+    private function generateRSASignature($input, $key, $algo)
+    {
+        if (!openssl_sign($input, $signature, $key, $algo)) {
+            throw new \Exception("Unable to sign data.");
+        }
+
+        return $signature;
+    }
+
+    public function urlSafeB64Encode($data)
+    {
+        $b64 = base64_encode($data);
+        $b64 = str_replace(array('+', '/', "\r", "\n", '='),
+                array('-', '_'),
+                $b64);
+
+        return $b64;
+    }
+
+    public function urlSafeB64Decode($b64)
+    {
+        $b64 = str_replace(array('-', '_'),
+                array('+', '/'),
+                $b64);
+
+        return base64_decode($b64);
+    }
+
+    /**
+     * Override to create a custom header
+     */
+    protected function generateJwtHeader($payload, $algorithm)
+    {
+        return array(
+            'typ' => 'JWT',
+            'alg' => $algorithm,
+        );
+    }
+
+    protected function hash_equals($a, $b)
+    {
+        if (function_exists('hash_equals')) {
+            return hash_equals($a, $b);
+        }
+        $diff = strlen($a) ^ strlen($b);
+        for ($i = 0; $i < strlen($a) && $i < strlen($b); $i++) {
+            $diff |= ord($a[$i]) ^ ord($b[$i]);
+        }
+
+        return $diff === 0;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/AuthorizationCode.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/AuthorizationCode.php
new file mode 100644
index 000000000..cae9f787d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/AuthorizationCode.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace OAuth2\GrantType;
+
+use OAuth2\Storage\AuthorizationCodeInterface;
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class AuthorizationCode implements GrantTypeInterface
+{
+    protected $storage;
+    protected $authCode;
+
+    /**
+     * @param \OAuth2\Storage\AuthorizationCodeInterface $storage REQUIRED Storage class for retrieving authorization code information
+     */
+    public function __construct(AuthorizationCodeInterface $storage)
+    {
+        $this->storage = $storage;
+    }
+
+    public function getQuerystringIdentifier()
+    {
+        return 'authorization_code';
+    }
+
+    public function validateRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$request->request('code')) {
+            $response->setError(400, 'invalid_request', 'Missing parameter: "code" is required');
+
+            return false;
+        }
+
+        $code = $request->request('code');
+        if (!$authCode = $this->storage->getAuthorizationCode($code)) {
+            $response->setError(400, 'invalid_grant', 'Authorization code doesn\'t exist or is invalid for the client');
+
+            return false;
+        }
+
+        /*
+         * 4.1.3 - ensure that the "redirect_uri" parameter is present if the "redirect_uri" parameter was included in the initial authorization request
+         * @uri - http://tools.ietf.org/html/rfc6749#section-4.1.3
+         */
+        if (isset($authCode['redirect_uri']) && $authCode['redirect_uri']) {
+            if (!$request->request('redirect_uri') || urldecode($request->request('redirect_uri')) != urldecode($authCode['redirect_uri'])) {
+                $response->setError(400, 'redirect_uri_mismatch', "The redirect URI is missing or do not match", "#section-4.1.3");
+
+                return false;
+            }
+        }
+
+        if (!isset($authCode['expires'])) {
+            throw new \Exception('Storage must return authcode with a value for "expires"');
+        }
+
+        if ($authCode["expires"] < time()) {
+            $response->setError(400, 'invalid_grant', "The authorization code has expired");
+
+            return false;
+        }
+
+        if (!isset($authCode['code'])) {
+            $authCode['code'] = $code; // used to expire the code after the access token is granted
+        }
+
+        $this->authCode = $authCode;
+
+        return true;
+    }
+
+    public function getClientId()
+    {
+        return $this->authCode['client_id'];
+    }
+
+    public function getScope()
+    {
+        return isset($this->authCode['scope']) ? $this->authCode['scope'] : null;
+    }
+
+    public function getUserId()
+    {
+        return isset($this->authCode['user_id']) ? $this->authCode['user_id'] : null;
+    }
+
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
+    {
+        $token = $accessToken->createAccessToken($client_id, $user_id, $scope);
+        $this->storage->expireAuthorizationCode($this->authCode['code']);
+
+        return $token;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/ClientCredentials.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/ClientCredentials.php
new file mode 100644
index 000000000..f953e4e8d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/ClientCredentials.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace OAuth2\GrantType;
+
+use OAuth2\ClientAssertionType\HttpBasic;
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\Storage\ClientCredentialsInterface;
+
+/**
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ *
+ * @see OAuth2\ClientAssertionType_HttpBasic
+ */
+class ClientCredentials extends HttpBasic implements GrantTypeInterface
+{
+    private $clientData;
+
+    public function __construct(ClientCredentialsInterface $storage, array $config = array())
+    {
+        /**
+         * The client credentials grant type MUST only be used by confidential clients
+         *
+         * @see http://tools.ietf.org/html/rfc6749#section-4.4
+         */
+        $config['allow_public_clients'] = false;
+
+        parent::__construct($storage, $config);
+    }
+
+    public function getQuerystringIdentifier()
+    {
+        return 'client_credentials';
+    }
+
+    public function getScope()
+    {
+        $this->loadClientData();
+
+        return isset($this->clientData['scope']) ? $this->clientData['scope'] : null;
+    }
+
+    public function getUserId()
+    {
+        $this->loadClientData();
+
+        return isset($this->clientData['user_id']) ? $this->clientData['user_id'] : null;
+    }
+
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
+    {
+        /**
+         * Client Credentials Grant does NOT include a refresh token
+         *
+         * @see http://tools.ietf.org/html/rfc6749#section-4.4.3
+         */
+        $includeRefreshToken = false;
+
+        return $accessToken->createAccessToken($client_id, $user_id, $scope, $includeRefreshToken);
+    }
+
+    private function loadClientData()
+    {
+        if (!$this->clientData) {
+            $this->clientData = $this->storage->getClientDetails($this->getClientId());
+        }
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/GrantTypeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/GrantTypeInterface.php
new file mode 100644
index 000000000..98489e9c1
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/GrantTypeInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace OAuth2\GrantType;
+
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * Interface for all OAuth2 Grant Types
+ */
+interface GrantTypeInterface
+{
+    public function getQuerystringIdentifier();
+    public function validateRequest(RequestInterface $request, ResponseInterface $response);
+    public function getClientId();
+    public function getUserId();
+    public function getScope();
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/JwtBearer.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/JwtBearer.php
new file mode 100644
index 000000000..bb11a6954
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/JwtBearer.php
@@ -0,0 +1,226 @@
+<?php
+
+namespace OAuth2\GrantType;
+
+use OAuth2\ClientAssertionType\ClientAssertionTypeInterface;
+use OAuth2\Storage\JwtBearerInterface;
+use OAuth2\Encryption\Jwt;
+use OAuth2\Encryption\EncryptionInterface;
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * The JWT bearer authorization grant implements JWT (JSON Web Tokens) as a grant type per the IETF draft.
+ *
+ * @see http://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-04#section-4
+ *
+ * @author F21
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class JwtBearer implements GrantTypeInterface, ClientAssertionTypeInterface
+{
+    private $jwt;
+
+    protected $storage;
+    protected $audience;
+    protected $jwtUtil;
+    protected $allowedAlgorithms;
+
+    /**
+     * Creates an instance of the JWT bearer grant type.
+     *
+     * @param OAuth2\Storage\JWTBearerInterface|JwtBearerInterface $storage A valid storage interface that implements storage hooks for the JWT bearer grant type.
+     * @param string $audience The audience to validate the token against. This is usually the full URI of the OAuth token requests endpoint.
+     * @param EncryptionInterface|OAuth2\Encryption\JWT $jwtUtil OPTONAL The class used to decode, encode and verify JWTs.
+     * @param array $config
+     */
+    public function __construct(JwtBearerInterface $storage, $audience, EncryptionInterface $jwtUtil = null, array $config = array())
+    {
+        $this->storage = $storage;
+        $this->audience = $audience;
+
+        if (is_null($jwtUtil)) {
+            $jwtUtil = new Jwt();
+        }
+
+        $this->config = array_merge(array(
+            'allowed_algorithms' => array('RS256', 'RS384', 'RS512')
+        ), $config);
+
+        $this->jwtUtil = $jwtUtil;
+
+        $this->allowedAlgorithms = $this->config['allowed_algorithms'];
+    }
+
+    /**
+     * Returns the grant_type get parameter to identify the grant type request as JWT bearer authorization grant.
+     *
+     * @return
+     * The string identifier for grant_type.
+     *
+     * @see OAuth2\GrantType\GrantTypeInterface::getQuerystringIdentifier()
+     */
+    public function getQuerystringIdentifier()
+    {
+        return 'urn:ietf:params:oauth:grant-type:jwt-bearer';
+    }
+
+    /**
+     * Validates the data from the decoded JWT.
+     *
+     * @return
+     * TRUE if the JWT request is valid and can be decoded. Otherwise, FALSE is returned.
+     *
+     * @see OAuth2\GrantType\GrantTypeInterface::getTokenData()
+     */
+    public function validateRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$request->request("assertion")) {
+            $response->setError(400, 'invalid_request', 'Missing parameters: "assertion" required');
+
+            return null;
+        }
+
+        // Store the undecoded JWT for later use
+        $undecodedJWT = $request->request('assertion');
+
+        // Decode the JWT
+        $jwt = $this->jwtUtil->decode($request->request('assertion'), null, false);
+
+        if (!$jwt) {
+            $response->setError(400, 'invalid_request', "JWT is malformed");
+
+            return null;
+        }
+
+        // ensure these properties contain a value
+        // @todo: throw malformed error for missing properties
+        $jwt = array_merge(array(
+            'scope' => null,
+            'iss' => null,
+            'sub' => null,
+            'aud' => null,
+            'exp' => null,
+            'nbf' => null,
+            'iat' => null,
+            'jti' => null,
+            'typ' => null,
+        ), $jwt);
+
+        if (!isset($jwt['iss'])) {
+            $response->setError(400, 'invalid_grant', "Invalid issuer (iss) provided");
+
+            return null;
+        }
+
+        if (!isset($jwt['sub'])) {
+            $response->setError(400, 'invalid_grant', "Invalid subject (sub) provided");
+
+            return null;
+        }
+
+        if (!isset($jwt['exp'])) {
+            $response->setError(400, 'invalid_grant', "Expiration (exp) time must be present");
+
+            return null;
+        }
+
+        // Check expiration
+        if (ctype_digit($jwt['exp'])) {
+            if ($jwt['exp'] <= time()) {
+                $response->setError(400, 'invalid_grant', "JWT has expired");
+
+                return null;
+            }
+        } else {
+            $response->setError(400, 'invalid_grant', "Expiration (exp) time must be a unix time stamp");
+
+            return null;
+        }
+
+        // Check the not before time
+        if ($notBefore = $jwt['nbf']) {
+            if (ctype_digit($notBefore)) {
+                if ($notBefore > time()) {
+                    $response->setError(400, 'invalid_grant', "JWT cannot be used before the Not Before (nbf) time");
+
+                    return null;
+                }
+            } else {
+                $response->setError(400, 'invalid_grant', "Not Before (nbf) time must be a unix time stamp");
+
+                return null;
+            }
+        }
+
+        // Check the audience if required to match
+        if (!isset($jwt['aud']) || ($jwt['aud'] != $this->audience)) {
+            $response->setError(400, 'invalid_grant', "Invalid audience (aud)");
+
+            return null;
+        }
+
+        // Check the jti (nonce)
+        // @see http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-13#section-4.1.7
+        if (isset($jwt['jti'])) {
+            $jti = $this->storage->getJti($jwt['iss'], $jwt['sub'], $jwt['aud'], $jwt['exp'], $jwt['jti']);
+
+            //Reject if jti is used and jwt is still valid (exp parameter has not expired).
+            if ($jti && $jti['expires'] > time()) {
+                $response->setError(400, 'invalid_grant', "JSON Token Identifier (jti) has already been used");
+
+                return null;
+            } else {
+                $this->storage->setJti($jwt['iss'], $jwt['sub'], $jwt['aud'], $jwt['exp'], $jwt['jti']);
+            }
+        }
+
+        // Get the iss's public key
+        // @see http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-06#section-4.1.1
+        if (!$key = $this->storage->getClientKey($jwt['iss'], $jwt['sub'])) {
+            $response->setError(400, 'invalid_grant', "Invalid issuer (iss) or subject (sub) provided");
+
+            return null;
+        }
+
+        // Verify the JWT
+        if (!$this->jwtUtil->decode($undecodedJWT, $key, $this->allowedAlgorithms)) {
+            $response->setError(400, 'invalid_grant', "JWT failed signature verification");
+
+            return null;
+        }
+
+        $this->jwt = $jwt;
+
+        return true;
+    }
+
+    public function getClientId()
+    {
+        return $this->jwt['iss'];
+    }
+
+    public function getUserId()
+    {
+        return $this->jwt['sub'];
+    }
+
+    public function getScope()
+    {
+        return null;
+    }
+
+    /**
+     * Creates an access token that is NOT associated with a refresh token.
+     * If a subject (sub) the name of the user/account we are accessing data on behalf of.
+     *
+     * @see OAuth2\GrantType\GrantTypeInterface::createAccessToken()
+     */
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
+    {
+        $includeRefreshToken = false;
+
+        return $accessToken->createAccessToken($client_id, $user_id, $scope, $includeRefreshToken);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/RefreshToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/RefreshToken.php
new file mode 100644
index 000000000..e55385222
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/RefreshToken.php
@@ -0,0 +1,111 @@
+<?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;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/UserCredentials.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/UserCredentials.php
new file mode 100644
index 000000000..f165538ba
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/GrantType/UserCredentials.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace OAuth2\GrantType;
+
+use OAuth2\Storage\UserCredentialsInterface;
+use OAuth2\ResponseType\AccessTokenInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class UserCredentials implements GrantTypeInterface
+{
+    private $userInfo;
+
+    protected $storage;
+
+    /**
+     * @param OAuth2\Storage\UserCredentialsInterface $storage REQUIRED Storage class for retrieving user credentials information
+     */
+    public function __construct(UserCredentialsInterface $storage)
+    {
+        $this->storage = $storage;
+    }
+
+    public function getQuerystringIdentifier()
+    {
+        return 'password';
+    }
+
+    public function validateRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$request->request("password") || !$request->request("username")) {
+            $response->setError(400, 'invalid_request', 'Missing parameters: "username" and "password" required');
+
+            return null;
+        }
+
+        if (!$this->storage->checkUserCredentials($request->request("username"), $request->request("password"))) {
+            $response->setError(401, 'invalid_grant', 'Invalid username and password combination');
+
+            return null;
+        }
+
+        $userInfo = $this->storage->getUserDetails($request->request("username"));
+
+        if (empty($userInfo)) {
+            $response->setError(400, 'invalid_grant', 'Unable to retrieve user information');
+
+            return null;
+        }
+
+        if (!isset($userInfo['user_id'])) {
+            throw new \LogicException("you must set the user_id on the array returned by getUserDetails");
+        }
+
+        $this->userInfo = $userInfo;
+
+        return true;
+    }
+
+    public function getClientId()
+    {
+        return null;
+    }
+
+    public function getUserId()
+    {
+        return $this->userInfo['user_id'];
+    }
+
+    public function getScope()
+    {
+        return isset($this->userInfo['scope']) ? $this->userInfo['scope'] : null;
+    }
+
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
+    {
+        return $accessToken->createAccessToken($client_id, $user_id, $scope);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeController.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeController.php
new file mode 100644
index 000000000..c9b5c6af7
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeController.php
@@ -0,0 +1,106 @@
+<?php
+
+namespace OAuth2\OpenID\Controller;
+
+use OAuth2\Controller\AuthorizeController as BaseAuthorizeController;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * @see OAuth2\Controller\AuthorizeControllerInterface
+ */
+class AuthorizeController extends BaseAuthorizeController implements AuthorizeControllerInterface
+{
+    private $nonce;
+
+    protected function setNotAuthorizedResponse(RequestInterface $request, ResponseInterface $response, $redirect_uri, $user_id = null)
+    {
+        $prompt = $request->query('prompt', 'consent');
+        if ($prompt == 'none') {
+            if (is_null($user_id)) {
+                $error = 'login_required';
+                $error_message = 'The user must log in';
+            } else {
+                $error = 'interaction_required';
+                $error_message = 'The user must grant access to your application';
+            }
+        } else {
+            $error = 'consent_required';
+            $error_message = 'The user denied access to your application';
+        }
+
+        $response->setRedirect($this->config['redirect_status_code'], $redirect_uri, $this->getState(), $error, $error_message);
+    }
+
+    protected function buildAuthorizeParameters($request, $response, $user_id)
+    {
+        if (!$params = parent::buildAuthorizeParameters($request, $response, $user_id)) {
+            return;
+        }
+
+        // Generate an id token if needed.
+        if ($this->needsIdToken($this->getScope()) && $this->getResponseType() == self::RESPONSE_TYPE_AUTHORIZATION_CODE) {
+            $params['id_token'] = $this->responseTypes['id_token']->createIdToken($this->getClientId(), $user_id, $this->nonce);
+        }
+
+        // add the nonce to return with the redirect URI
+        $params['nonce'] = $this->nonce;
+
+        return $params;
+    }
+
+    public function validateAuthorizeRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!parent::validateAuthorizeRequest($request, $response)) {
+            return false;
+        }
+
+        $nonce = $request->query('nonce');
+
+        // Validate required nonce for "id_token" and "id_token token"
+        if (!$nonce && in_array($this->getResponseType(), array(self::RESPONSE_TYPE_ID_TOKEN, self::RESPONSE_TYPE_ID_TOKEN_TOKEN))) {
+            $response->setError(400, 'invalid_nonce', 'This application requires you specify a nonce parameter');
+
+            return false;
+        }
+
+        $this->nonce = $nonce;
+
+        return true;
+    }
+
+    protected function getValidResponseTypes()
+    {
+        return array(
+            self::RESPONSE_TYPE_ACCESS_TOKEN,
+            self::RESPONSE_TYPE_AUTHORIZATION_CODE,
+            self::RESPONSE_TYPE_ID_TOKEN,
+            self::RESPONSE_TYPE_ID_TOKEN_TOKEN,
+            self::RESPONSE_TYPE_CODE_ID_TOKEN,
+        );
+    }
+
+    /**
+     * Returns whether the current request needs to generate an id token.
+     *
+     * ID Tokens are a part of the OpenID Connect specification, so this
+     * method checks whether OpenID Connect is enabled in the server settings
+     * and whether the openid scope was requested.
+     *
+     * @param $request_scope
+     *  A space-separated string of scopes.
+     *
+     * @return
+     *   TRUE if an id token is needed, FALSE otherwise.
+     */
+    public function needsIdToken($request_scope)
+    {
+        // see if the "openid" scope exists in the requested scope
+        return $this->scopeUtil->checkScope('openid', $request_scope);
+    }
+
+    public function getNonce()
+    {
+        return $this->nonce;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeControllerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeControllerInterface.php
new file mode 100644
index 000000000..1e231d844
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/AuthorizeControllerInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace OAuth2\OpenID\Controller;
+
+interface AuthorizeControllerInterface
+{
+    const RESPONSE_TYPE_ID_TOKEN = 'id_token';
+    const RESPONSE_TYPE_ID_TOKEN_TOKEN = 'id_token token';
+    const RESPONSE_TYPE_CODE_ID_TOKEN  = 'code id_token';
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoController.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoController.php
new file mode 100644
index 000000000..30cb942d0
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoController.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace OAuth2\OpenID\Controller;
+
+use OAuth2\Scope;
+use OAuth2\TokenType\TokenTypeInterface;
+use OAuth2\Storage\AccessTokenInterface;
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+use OAuth2\Controller\ResourceController;
+use OAuth2\ScopeInterface;
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ * @see OAuth2\Controller\UserInfoControllerInterface
+ */
+class UserInfoController extends ResourceController implements UserInfoControllerInterface
+{
+    private $token;
+
+    protected $tokenType;
+    protected $tokenStorage;
+    protected $userClaimsStorage;
+    protected $config;
+    protected $scopeUtil;
+
+    public function __construct(TokenTypeInterface $tokenType, AccessTokenInterface $tokenStorage, UserClaimsInterface $userClaimsStorage, $config = array(), ScopeInterface $scopeUtil = null)
+    {
+        $this->tokenType = $tokenType;
+        $this->tokenStorage = $tokenStorage;
+        $this->userClaimsStorage = $userClaimsStorage;
+
+        $this->config = array_merge(array(
+            'www_realm' => 'Service',
+        ), $config);
+
+        if (is_null($scopeUtil)) {
+            $scopeUtil = new Scope();
+        }
+        $this->scopeUtil = $scopeUtil;
+    }
+
+    public function handleUserInfoRequest(RequestInterface $request, ResponseInterface $response)
+    {
+        if (!$this->verifyResourceRequest($request, $response, 'openid')) {
+            return;
+        }
+
+        $token = $this->getToken();
+        $claims = $this->userClaimsStorage->getUserClaims($token['user_id'], $token['scope']);
+        // The sub Claim MUST always be returned in the UserInfo Response.
+        // http://openid.net/specs/openid-connect-core-1_0.html#UserInfoResponse
+        $claims += array(
+            'sub' => $token['user_id'],
+        );
+        $response->addParameters($claims);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoControllerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoControllerInterface.php
new file mode 100644
index 000000000..a89049d49
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Controller/UserInfoControllerInterface.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace OAuth2\OpenID\Controller;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+ *  This controller is called when the user claims for OpenID Connect's
+ *  UserInfo endpoint should be returned.
+ *
+ *  ex:
+ *  > $response = new OAuth2\Response();
+ *  > $userInfoController->handleUserInfoRequest(
+ *  >     OAuth2\Request::createFromGlobals(),
+ *  >     $response;
+ *  > $response->send();
+ *
+ */
+interface UserInfoControllerInterface
+{
+    public function handleUserInfoRequest(RequestInterface $request, ResponseInterface $response);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/GrantType/AuthorizationCode.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/GrantType/AuthorizationCode.php
new file mode 100644
index 000000000..8ed1edc26
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/GrantType/AuthorizationCode.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace OAuth2\OpenID\GrantType;
+
+use OAuth2\GrantType\AuthorizationCode as BaseAuthorizationCode;
+use OAuth2\ResponseType\AccessTokenInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class AuthorizationCode extends BaseAuthorizationCode
+{
+    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
+    {
+        $includeRefreshToken = true;
+        if (isset($this->authCode['id_token'])) {
+            // OpenID Connect requests include the refresh token only if the
+            // offline_access scope has been requested and granted.
+            $scopes = explode(' ', trim($scope));
+            $includeRefreshToken = in_array('offline_access', $scopes);
+        }
+
+        $token = $accessToken->createAccessToken($client_id, $user_id, $scope, $includeRefreshToken);
+        if (isset($this->authCode['id_token'])) {
+            $token['id_token'] = $this->authCode['id_token'];
+        }
+
+        $this->storage->expireAuthorizationCode($this->authCode['code']);
+
+        return $token;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCode.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCode.php
new file mode 100644
index 000000000..8971954c5
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCode.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\AuthorizationCode as BaseAuthorizationCode;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as AuthorizationCodeStorageInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class AuthorizationCode extends BaseAuthorizationCode implements AuthorizationCodeInterface
+{
+    public function __construct(AuthorizationCodeStorageInterface $storage, array $config = array())
+    {
+        parent::__construct($storage, $config);
+    }
+
+    public function getAuthorizeResponse($params, $user_id = null)
+    {
+        // build the URL to redirect to
+        $result = array('query' => array());
+
+        $params += array('scope' => null, 'state' => null, 'id_token' => null);
+
+        $result['query']['code'] = $this->createAuthorizationCode($params['client_id'], $user_id, $params['redirect_uri'], $params['scope'], $params['id_token']);
+
+        if (isset($params['state'])) {
+            $result['query']['state'] = $params['state'];
+        }
+
+        return array($params['redirect_uri'], $result);
+    }
+
+    /**
+     * Handle the creation of the authorization code.
+     *
+     * @param $client_id
+     * Client identifier related to the authorization code
+     * @param $user_id
+     * User ID associated with the authorization code
+     * @param $redirect_uri
+     * An absolute URI to which the authorization server will redirect the
+     * user-agent to when the end-user authorization step is completed.
+     * @param $scope
+     * (optional) Scopes to be stored in space-separated string.
+     * @param $id_token
+     * (optional) The OpenID Connect id_token.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @ingroup oauth2_section_4
+     */
+    public function createAuthorizationCode($client_id, $user_id, $redirect_uri, $scope = null, $id_token = null)
+    {
+        $code = $this->generateAuthorizationCode();
+        $this->storage->setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, time() + $this->config['auth_code_lifetime'], $scope, $id_token);
+
+        return $code;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCodeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCodeInterface.php
new file mode 100644
index 000000000..ea4779255
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/AuthorizationCodeInterface.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\AuthorizationCodeInterface as BaseAuthorizationCodeInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AuthorizationCodeInterface extends BaseAuthorizationCodeInterface
+{
+    /**
+     * Handle the creation of the authorization code.
+     *
+     * @param $client_id                Client identifier related to the authorization code
+     * @param $user_id                  User ID associated with the authorization code
+     * @param $redirect_uri             An absolute URI to which the authorization server will redirect the
+     *                                  user-agent to when the end-user authorization step is completed.
+     * @param $scope        OPTIONAL    Scopes to be stored in space-separated string.
+     * @param $id_token     OPTIONAL    The OpenID Connect id_token.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @ingroup oauth2_section_4
+     */
+    public function createAuthorizationCode($client_id, $user_id, $redirect_uri, $scope = null, $id_token = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdToken.php
new file mode 100644
index 000000000..ac7764d6c
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdToken.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+class CodeIdToken implements CodeIdTokenInterface
+{
+    protected $authCode;
+    protected $idToken;
+
+    public function __construct(AuthorizationCodeInterface $authCode, IdTokenInterface $idToken)
+    {
+        $this->authCode = $authCode;
+        $this->idToken = $idToken;
+    }
+
+    public function getAuthorizeResponse($params, $user_id = null)
+    {
+        $result = $this->authCode->getAuthorizeResponse($params, $user_id);
+        $resultIdToken = $this->idToken->getAuthorizeResponse($params, $user_id);
+        $result[1]['query']['id_token'] = $resultIdToken[1]['fragment']['id_token'];
+
+        return $result;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdTokenInterface.php
new file mode 100644
index 000000000..629adcca8
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/CodeIdTokenInterface.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\ResponseTypeInterface;
+
+interface CodeIdTokenInterface extends ResponseTypeInterface
+{
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdToken.php
new file mode 100644
index 000000000..97777fbf2
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdToken.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\Encryption\EncryptionInterface;
+use OAuth2\Encryption\Jwt;
+use OAuth2\Storage\PublicKeyInterface;
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+
+class IdToken implements IdTokenInterface
+{
+    protected $userClaimsStorage;
+    protected $publicKeyStorage;
+    protected $config;
+    protected $encryptionUtil;
+
+    public function __construct(UserClaimsInterface $userClaimsStorage, PublicKeyInterface $publicKeyStorage, array $config = array(), EncryptionInterface $encryptionUtil = null)
+    {
+        $this->userClaimsStorage = $userClaimsStorage;
+        $this->publicKeyStorage = $publicKeyStorage;
+        if (is_null($encryptionUtil)) {
+            $encryptionUtil = new Jwt();
+        }
+        $this->encryptionUtil = $encryptionUtil;
+
+        if (!isset($config['issuer'])) {
+            throw new \LogicException('config parameter "issuer" must be set');
+        }
+        $this->config = array_merge(array(
+            'id_lifetime' => 3600,
+        ), $config);
+    }
+
+    public function getAuthorizeResponse($params, $userInfo = null)
+    {
+        // build the URL to redirect to
+        $result = array('query' => array());
+        $params += array('scope' => null, 'state' => null, 'nonce' => null);
+
+        // create the id token.
+        list($user_id, $auth_time) = $this->getUserIdAndAuthTime($userInfo);
+        $userClaims = $this->userClaimsStorage->getUserClaims($user_id, $params['scope']);
+
+        $id_token = $this->createIdToken($params['client_id'], $userInfo, $params['nonce'], $userClaims, null);
+        $result["fragment"] = array('id_token' => $id_token);
+        if (isset($params['state'])) {
+            $result["fragment"]["state"] = $params['state'];
+        }
+
+        return array($params['redirect_uri'], $result);
+    }
+
+    public function createIdToken($client_id, $userInfo, $nonce = null, $userClaims = null, $access_token = null)
+    {
+        // pull auth_time from user info if supplied
+        list($user_id, $auth_time) = $this->getUserIdAndAuthTime($userInfo);
+
+        $token = array(
+            'iss'        => $this->config['issuer'],
+            'sub'        => $user_id,
+            'aud'        => $client_id,
+            'iat'        => time(),
+            'exp'        => time() + $this->config['id_lifetime'],
+            'auth_time'  => $auth_time,
+        );
+
+        if ($nonce) {
+            $token['nonce'] = $nonce;
+        }
+
+        if ($userClaims) {
+            $token += $userClaims;
+        }
+
+        if ($access_token) {
+            $token['at_hash'] = $this->createAtHash($access_token, $client_id);
+        }
+
+        return $this->encodeToken($token, $client_id);
+    }
+
+    protected function createAtHash($access_token, $client_id = null)
+    {
+        // maps HS256 and RS256 to sha256, etc.
+        $algorithm = $this->publicKeyStorage->getEncryptionAlgorithm($client_id);
+        $hash_algorithm = 'sha' . substr($algorithm, 2);
+        $hash = hash($hash_algorithm, $access_token, true);
+        $at_hash = substr($hash, 0, strlen($hash) / 2);
+
+        return $this->encryptionUtil->urlSafeB64Encode($at_hash);
+    }
+
+    protected function encodeToken(array $token, $client_id = null)
+    {
+        $private_key = $this->publicKeyStorage->getPrivateKey($client_id);
+        $algorithm = $this->publicKeyStorage->getEncryptionAlgorithm($client_id);
+
+        return $this->encryptionUtil->encode($token, $private_key, $algorithm);
+    }
+
+    private function getUserIdAndAuthTime($userInfo)
+    {
+        $auth_time = null;
+
+        // support an array for user_id / auth_time
+        if (is_array($userInfo)) {
+            if (!isset($userInfo['user_id'])) {
+                throw new \LogicException('if $user_id argument is an array, user_id index must be set');
+            }
+
+            $auth_time = isset($userInfo['auth_time']) ? $userInfo['auth_time'] : null;
+            $user_id = $userInfo['user_id'];
+        } else {
+            $user_id = $userInfo;
+        }
+
+        if (is_null($auth_time)) {
+            $auth_time = time();
+        }
+
+        // userInfo is a scalar, and so this is the $user_id. Auth Time is null
+        return array($user_id, $auth_time);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenInterface.php
new file mode 100644
index 000000000..0bd2f8391
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenInterface.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\ResponseTypeInterface;
+
+interface IdTokenInterface extends ResponseTypeInterface
+{
+    /**
+     * Create the id token.
+     *
+     * If Authorization Code Flow is used, the id_token is generated when the
+     * authorization code is issued, and later returned from the token endpoint
+     * together with the access_token.
+     * If the Implicit Flow is used, the token and id_token are generated and
+     * returned together.
+     *
+     * @param string $client_id    The client id.
+     * @param string $user_id      The user id.
+     * @param string $nonce        OPTIONAL The nonce.
+     * @param string $userClaims   OPTIONAL Claims about the user.
+     * @param string $access_token OPTIONAL The access token, if known.
+     *
+     * @return string The ID Token represented as a JSON Web Token (JWT).
+     *
+     * @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken
+     */
+    public function createIdToken($client_id, $userInfo, $nonce = null, $userClaims = null, $access_token = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenToken.php
new file mode 100644
index 000000000..f0c59799b
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenToken.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\AccessTokenInterface;
+
+class IdTokenToken implements IdTokenTokenInterface
+{
+    protected $accessToken;
+    protected $idToken;
+
+    public function __construct(AccessTokenInterface $accessToken, IdTokenInterface $idToken)
+    {
+        $this->accessToken = $accessToken;
+        $this->idToken = $idToken;
+    }
+
+    public function getAuthorizeResponse($params, $user_id = null)
+    {
+        $result = $this->accessToken->getAuthorizeResponse($params, $user_id);
+        $access_token = $result[1]['fragment']['access_token'];
+        $id_token = $this->idToken->createIdToken($params['client_id'], $user_id, $params['nonce'], null, $access_token);
+        $result[1]['fragment']['id_token'] = $id_token;
+
+        return $result;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenTokenInterface.php
new file mode 100644
index 000000000..ac13e2032
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/ResponseType/IdTokenTokenInterface.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace OAuth2\OpenID\ResponseType;
+
+use OAuth2\ResponseType\ResponseTypeInterface;
+
+interface IdTokenTokenInterface extends ResponseTypeInterface
+{
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/AuthorizationCodeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/AuthorizationCodeInterface.php
new file mode 100644
index 000000000..51dd867ec
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/AuthorizationCodeInterface.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace OAuth2\OpenID\Storage;
+
+use OAuth2\Storage\AuthorizationCodeInterface as BaseAuthorizationCodeInterface;
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get/save authorization codes for the "Authorization Code"
+ * grant type
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AuthorizationCodeInterface extends BaseAuthorizationCodeInterface
+{
+    /**
+     * Take the provided authorization code values and store them somewhere.
+     *
+     * This function should be the storage counterpart to getAuthCode().
+     *
+     * If storage fails for some reason, we're not currently checking for
+     * any sort of success/failure, so you should bail out of the script
+     * and provide a descriptive fail message.
+     *
+     * Required for OAuth2::GRANT_TYPE_AUTH_CODE.
+     *
+     * @param $code                authorization code to be stored.
+     * @param $client_id           client identifier to be stored.
+     * @param $user_id             user identifier to be stored.
+     * @param string $redirect_uri redirect URI(s) to be stored in a space-separated string.
+     * @param int    $expires      expiration to be stored as a Unix timestamp.
+     * @param string $scope        OPTIONAL scopes to be stored in space-separated string.
+     * @param string $id_token     OPTIONAL the OpenID Connect id_token.
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/UserClaimsInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/UserClaimsInterface.php
new file mode 100644
index 000000000..f230bef9e
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/OpenID/Storage/UserClaimsInterface.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace OAuth2\OpenID\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should retrieve user claims for the OpenID Connect id_token.
+ */
+interface UserClaimsInterface
+{
+    // valid scope values to pass into the user claims API call
+    const VALID_CLAIMS = 'profile email address phone';
+
+    // fields returned for the claims above
+    const PROFILE_CLAIM_VALUES  = 'name family_name given_name middle_name nickname preferred_username profile picture website gender birthdate zoneinfo locale updated_at';
+    const EMAIL_CLAIM_VALUES    = 'email email_verified';
+    const ADDRESS_CLAIM_VALUES  = 'formatted street_address locality region postal_code country';
+    const PHONE_CLAIM_VALUES    = 'phone_number phone_number_verified';
+
+    /**
+     * Return claims about the provided user id.
+     *
+     * Groups of claims are returned based on the requested scopes. No group
+     * is required, and no claim is required.
+     *
+     * @param $user_id
+     * The id of the user for which claims should be returned.
+     * @param $scope
+     * The requested scope.
+     * Scopes with matching claims: profile, email, address, phone.
+     *
+     * @return
+     * An array in the claim => value format.
+     *
+     * @see http://openid.net/specs/openid-connect-core-1_0.html#ScopeClaims
+     */
+    public function getUserClaims($user_id, $scope);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Request.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Request.php
new file mode 100644
index 000000000..c92cee821
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Request.php
@@ -0,0 +1,213 @@
+<?php
+
+namespace OAuth2;
+
+/**
+ * OAuth2\Request
+ * This class is taken from the Symfony2 Framework and is part of the Symfony package.
+ * See Symfony\Component\HttpFoundation\Request (https://github.com/symfony/symfony)
+ */
+class Request implements RequestInterface
+{
+    public $attributes;
+    public $request;
+    public $query;
+    public $server;
+    public $files;
+    public $cookies;
+    public $headers;
+    public $content;
+
+    /**
+     * Constructor.
+     *
+     * @param array  $query      The GET parameters
+     * @param array  $request    The POST parameters
+     * @param array  $attributes The request attributes (parameters parsed from the PATH_INFO, ...)
+     * @param array  $cookies    The COOKIE parameters
+     * @param array  $files      The FILES parameters
+     * @param array  $server     The SERVER parameters
+     * @param string $content    The raw body data
+     *
+     * @api
+     */
+    public function __construct(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null, array $headers = null)
+    {
+        $this->initialize($query, $request, $attributes, $cookies, $files, $server, $content, $headers);
+    }
+
+    /**
+     * Sets the parameters for this request.
+     *
+     * This method also re-initializes all properties.
+     *
+     * @param array  $query      The GET parameters
+     * @param array  $request    The POST parameters
+     * @param array  $attributes The request attributes (parameters parsed from the PATH_INFO, ...)
+     * @param array  $cookies    The COOKIE parameters
+     * @param array  $files      The FILES parameters
+     * @param array  $server     The SERVER parameters
+     * @param string $content    The raw body data
+     *
+     * @api
+     */
+    public function initialize(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null, array $headers = null)
+    {
+        $this->request = $request;
+        $this->query = $query;
+        $this->attributes = $attributes;
+        $this->cookies = $cookies;
+        $this->files = $files;
+        $this->server = $server;
+        $this->content = $content;
+        $this->headers = is_null($headers) ? $this->getHeadersFromServer($this->server) : $headers;
+    }
+
+    public function query($name, $default = null)
+    {
+        return isset($this->query[$name]) ? $this->query[$name] : $default;
+    }
+
+    public function request($name, $default = null)
+    {
+        return isset($this->request[$name]) ? $this->request[$name] : $default;
+    }
+
+    public function server($name, $default = null)
+    {
+        return isset($this->server[$name]) ? $this->server[$name] : $default;
+    }
+
+    public function headers($name, $default = null)
+    {
+        $headers = array_change_key_case($this->headers);
+        $name = strtolower($name);
+
+        return isset($headers[$name]) ? $headers[$name] : $default;
+    }
+
+    public function getAllQueryParameters()
+    {
+        return $this->query;
+    }
+
+    /**
+     * Returns the request body content.
+     *
+     * @param Boolean $asResource If true, a resource will be returned
+     *
+     * @return string|resource The request body content or a resource to read the body stream.
+     */
+    public function getContent($asResource = false)
+    {
+        if (false === $this->content || (true === $asResource && null !== $this->content)) {
+            throw new \LogicException('getContent() can only be called once when using the resource return type.');
+        }
+
+        if (true === $asResource) {
+            $this->content = false;
+
+            return fopen('php://input', 'rb');
+        }
+
+        if (null === $this->content) {
+            $this->content = file_get_contents('php://input');
+        }
+
+        return $this->content;
+    }
+
+    private function getHeadersFromServer($server)
+    {
+        $headers = array();
+        foreach ($server as $key => $value) {
+            if (0 === strpos($key, 'HTTP_')) {
+                $headers[substr($key, 5)] = $value;
+            }
+            // CONTENT_* are not prefixed with HTTP_
+            elseif (in_array($key, array('CONTENT_LENGTH', 'CONTENT_MD5', 'CONTENT_TYPE'))) {
+                $headers[$key] = $value;
+            }
+        }
+
+        if (isset($server['PHP_AUTH_USER'])) {
+            $headers['PHP_AUTH_USER'] = $server['PHP_AUTH_USER'];
+            $headers['PHP_AUTH_PW'] = isset($server['PHP_AUTH_PW']) ? $server['PHP_AUTH_PW'] : '';
+        } else {
+            /*
+             * php-cgi under Apache does not pass HTTP Basic user/pass to PHP by default
+             * For this workaround to work, add this line to your .htaccess file:
+             * RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+             *
+             * A sample .htaccess file:
+             * RewriteEngine On
+             * RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+             * RewriteCond %{REQUEST_FILENAME} !-f
+             * RewriteRule ^(.*)$ app.php [QSA,L]
+             */
+
+            $authorizationHeader = null;
+            if (isset($server['HTTP_AUTHORIZATION'])) {
+                $authorizationHeader = $server['HTTP_AUTHORIZATION'];
+            } elseif (isset($server['REDIRECT_HTTP_AUTHORIZATION'])) {
+                $authorizationHeader = $server['REDIRECT_HTTP_AUTHORIZATION'];
+            } elseif (function_exists('apache_request_headers')) {
+                $requestHeaders = (array) apache_request_headers();
+
+                // Server-side fix for bug in old Android versions (a nice side-effect of this fix means we don't care about capitalization for Authorization)
+                $requestHeaders = array_combine(array_map('ucwords', array_keys($requestHeaders)), array_values($requestHeaders));
+
+                if (isset($requestHeaders['Authorization'])) {
+                    $authorizationHeader = trim($requestHeaders['Authorization']);
+                }
+            }
+
+            if (null !== $authorizationHeader) {
+                $headers['AUTHORIZATION'] = $authorizationHeader;
+                // Decode AUTHORIZATION header into PHP_AUTH_USER and PHP_AUTH_PW when authorization header is basic
+                if (0 === stripos($authorizationHeader, 'basic')) {
+                    $exploded = explode(':', base64_decode(substr($authorizationHeader, 6)));
+                    if (count($exploded) == 2) {
+                        list($headers['PHP_AUTH_USER'], $headers['PHP_AUTH_PW']) = $exploded;
+                    }
+                }
+            }
+        }
+
+        // PHP_AUTH_USER/PHP_AUTH_PW
+        if (isset($headers['PHP_AUTH_USER'])) {
+            $headers['AUTHORIZATION'] = 'Basic '.base64_encode($headers['PHP_AUTH_USER'].':'.$headers['PHP_AUTH_PW']);
+        }
+
+        return $headers;
+    }
+
+    /**
+     * Creates a new request with values from PHP's super globals.
+     *
+     * @return Request A new request
+     *
+     * @api
+     */
+    public static function createFromGlobals()
+    {
+        $class = get_called_class();
+        $request = new $class($_GET, $_POST, array(), $_COOKIE, $_FILES, $_SERVER);
+
+        $contentType = $request->server('CONTENT_TYPE', '');
+        $requestMethod = $request->server('REQUEST_METHOD', 'GET');
+        if (0 === strpos($contentType, 'application/x-www-form-urlencoded')
+            && in_array(strtoupper($requestMethod), array('PUT', 'DELETE'))
+        ) {
+            parse_str($request->getContent(), $data);
+            $request->request = $data;
+        } elseif (0 === strpos($contentType, 'application/json')
+            && in_array(strtoupper($requestMethod), array('POST', 'PUT', 'DELETE'))
+        ) {
+            $data = json_decode($request->getContent(), true);
+            $request->request = $data;
+        }
+
+        return $request;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/RequestInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/RequestInterface.php
new file mode 100644
index 000000000..8a70d5fad
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/RequestInterface.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace OAuth2;
+
+interface RequestInterface
+{
+    public function query($name, $default = null);
+
+    public function request($name, $default = null);
+
+    public function server($name, $default = null);
+
+    public function headers($name, $default = null);
+
+    public function getAllQueryParameters();
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Response.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Response.php
new file mode 100644
index 000000000..fc1e62a98
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Response.php
@@ -0,0 +1,369 @@
+<?php
+
+namespace OAuth2;
+
+/**
+ * Class to handle OAuth2 Responses in a graceful way.  Use this interface
+ * to output the proper OAuth2 responses.
+ *
+ * @see OAuth2\ResponseInterface
+ *
+ * This class borrows heavily from the Symfony2 Framework and is part of the symfony package
+ * @see Symfony\Component\HttpFoundation\Request (https://github.com/symfony/symfony)
+ */
+class Response implements ResponseInterface
+{
+    public $version;
+    protected $statusCode = 200;
+    protected $statusText;
+    protected $parameters = array();
+    protected $httpHeaders = array();
+
+    public static $statusTexts = array(
+        100 => 'Continue',
+        101 => 'Switching Protocols',
+        200 => 'OK',
+        201 => 'Created',
+        202 => 'Accepted',
+        203 => 'Non-Authoritative Information',
+        204 => 'No Content',
+        205 => 'Reset Content',
+        206 => 'Partial Content',
+        300 => 'Multiple Choices',
+        301 => 'Moved Permanently',
+        302 => 'Found',
+        303 => 'See Other',
+        304 => 'Not Modified',
+        305 => 'Use Proxy',
+        307 => 'Temporary Redirect',
+        400 => 'Bad Request',
+        401 => 'Unauthorized',
+        402 => 'Payment Required',
+        403 => 'Forbidden',
+        404 => 'Not Found',
+        405 => 'Method Not Allowed',
+        406 => 'Not Acceptable',
+        407 => 'Proxy Authentication Required',
+        408 => 'Request Timeout',
+        409 => 'Conflict',
+        410 => 'Gone',
+        411 => 'Length Required',
+        412 => 'Precondition Failed',
+        413 => 'Request Entity Too Large',
+        414 => 'Request-URI Too Long',
+        415 => 'Unsupported Media Type',
+        416 => 'Requested Range Not Satisfiable',
+        417 => 'Expectation Failed',
+        418 => 'I\'m a teapot',
+        500 => 'Internal Server Error',
+        501 => 'Not Implemented',
+        502 => 'Bad Gateway',
+        503 => 'Service Unavailable',
+        504 => 'Gateway Timeout',
+        505 => 'HTTP Version Not Supported',
+    );
+
+    public function __construct($parameters = array(), $statusCode = 200, $headers = array())
+    {
+        $this->setParameters($parameters);
+        $this->setStatusCode($statusCode);
+        $this->setHttpHeaders($headers);
+        $this->version = '1.1';
+    }
+
+    /**
+     * Converts the response object to string containing all headers and the response content.
+     *
+     * @return string The response with headers and content
+     */
+    public function __toString()
+    {
+        $headers = array();
+        foreach ($this->httpHeaders as $name => $value) {
+            $headers[$name] = (array) $value;
+        }
+
+        return
+            sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText)."\r\n".
+            $this->getHttpHeadersAsString($headers)."\r\n".
+            $this->getResponseBody();
+    }
+
+    /**
+     * Returns the build header line.
+     *
+     * @param string $name  The header name
+     * @param string $value The header value
+     *
+     * @return string The built header line
+     */
+    protected function buildHeader($name, $value)
+    {
+        return sprintf("%s: %s\n", $name, $value);
+    }
+
+    public function getStatusCode()
+    {
+        return $this->statusCode;
+    }
+
+    public function setStatusCode($statusCode, $text = null)
+    {
+        $this->statusCode = (int) $statusCode;
+        if ($this->isInvalid()) {
+            throw new \InvalidArgumentException(sprintf('The HTTP status code "%s" is not valid.', $statusCode));
+        }
+
+        $this->statusText = false === $text ? '' : (null === $text ? self::$statusTexts[$this->statusCode] : $text);
+    }
+
+    public function getStatusText()
+    {
+        return $this->statusText;
+    }
+
+    public function getParameters()
+    {
+        return $this->parameters;
+    }
+
+    public function setParameters(array $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    public function addParameters(array $parameters)
+    {
+        $this->parameters = array_merge($this->parameters, $parameters);
+    }
+
+    public function getParameter($name, $default = null)
+    {
+        return isset($this->parameters[$name]) ? $this->parameters[$name] : $default;
+    }
+
+    public function setParameter($name, $value)
+    {
+        $this->parameters[$name] = $value;
+    }
+
+    public function setHttpHeaders(array $httpHeaders)
+    {
+        $this->httpHeaders = $httpHeaders;
+    }
+
+    public function setHttpHeader($name, $value)
+    {
+        $this->httpHeaders[$name] = $value;
+    }
+
+    public function addHttpHeaders(array $httpHeaders)
+    {
+        $this->httpHeaders = array_merge($this->httpHeaders, $httpHeaders);
+    }
+
+    public function getHttpHeaders()
+    {
+        return $this->httpHeaders;
+    }
+
+    public function getHttpHeader($name, $default = null)
+    {
+        return isset($this->httpHeaders[$name]) ? $this->httpHeaders[$name] : $default;
+    }
+
+    public function getResponseBody($format = 'json')
+    {
+        switch ($format) {
+            case 'json':
+                return $this->parameters ? json_encode($this->parameters) : '';
+            case 'xml':
+                // this only works for single-level arrays
+                $xml = new \SimpleXMLElement('<response/>');
+                foreach ($this->parameters as $key => $param) {
+                    $xml->addChild($key, $param);
+                }
+
+                return $xml->asXML();
+        }
+
+        throw new \InvalidArgumentException(sprintf('The format %s is not supported', $format));
+
+    }
+
+    public function send($format = 'json')
+    {
+        // headers have already been sent by the developer
+        if (headers_sent()) {
+            return;
+        }
+
+        switch ($format) {
+            case 'json':
+                $this->setHttpHeader('Content-Type', 'application/json');
+                break;
+            case 'xml':
+                $this->setHttpHeader('Content-Type', 'text/xml');
+                break;
+        }
+        // status
+        header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText));
+
+        foreach ($this->getHttpHeaders() as $name => $header) {
+            header(sprintf('%s: %s', $name, $header));
+        }
+        echo $this->getResponseBody($format);
+    }
+
+    public function setError($statusCode, $error, $errorDescription = null, $errorUri = null)
+    {
+        $parameters = array(
+            'error' => $error,
+            'error_description' => $errorDescription,
+        );
+
+        if (!is_null($errorUri)) {
+            if (strlen($errorUri) > 0 && $errorUri[0] == '#') {
+                // we are referencing an oauth bookmark (for brevity)
+                $errorUri = 'http://tools.ietf.org/html/rfc6749' . $errorUri;
+            }
+            $parameters['error_uri'] = $errorUri;
+        }
+
+        $httpHeaders = array(
+            'Cache-Control' => 'no-store'
+        );
+
+        $this->setStatusCode($statusCode);
+        $this->addParameters($parameters);
+        $this->addHttpHeaders($httpHeaders);
+
+        if (!$this->isClientError() && !$this->isServerError()) {
+            throw new \InvalidArgumentException(sprintf('The HTTP status code is not an error ("%s" given).', $statusCode));
+        }
+    }
+
+    public function setRedirect($statusCode, $url, $state = null, $error = null, $errorDescription = null, $errorUri = null)
+    {
+        if (empty($url)) {
+            throw new \InvalidArgumentException('Cannot redirect to an empty URL.');
+        }
+
+        $parameters = array();
+
+        if (!is_null($state)) {
+            $parameters['state'] = $state;
+        }
+
+        if (!is_null($error)) {
+            $this->setError(400, $error, $errorDescription, $errorUri);
+        }
+        $this->setStatusCode($statusCode);
+        $this->addParameters($parameters);
+
+        if (count($this->parameters) > 0) {
+            // add parameters to URL redirection
+            $parts = parse_url($url);
+            $sep = isset($parts['query']) && count($parts['query']) > 0 ? '&' : '?';
+            $url .= $sep . http_build_query($this->parameters);
+        }
+
+        $this->addHttpHeaders(array('Location' =>  $url));
+
+        if (!$this->isRedirection()) {
+            throw new \InvalidArgumentException(sprintf('The HTTP status code is not a redirect ("%s" given).', $statusCode));
+        }
+    }
+
+    // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isInvalid()
+    {
+        return $this->statusCode < 100 || $this->statusCode >= 600;
+    }
+
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isInformational()
+    {
+        return $this->statusCode >= 100 && $this->statusCode < 200;
+    }
+
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isSuccessful()
+    {
+        return $this->statusCode >= 200 && $this->statusCode < 300;
+    }
+
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isRedirection()
+    {
+        return $this->statusCode >= 300 && $this->statusCode < 400;
+    }
+
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isClientError()
+    {
+        return $this->statusCode >= 400 && $this->statusCode < 500;
+    }
+
+    /**
+     * @return Boolean
+     *
+     * @api
+     */
+    public function isServerError()
+    {
+        return $this->statusCode >= 500 && $this->statusCode < 600;
+    }
+
+    /*
+     * Functions from Symfony2 HttpFoundation - output pretty header
+     */
+    private function getHttpHeadersAsString($headers)
+    {
+        if (count($headers) == 0) {
+            return '';
+        }
+
+        $max = max(array_map('strlen', array_keys($headers))) + 1;
+        $content = '';
+        ksort($headers);
+        foreach ($headers as $name => $values) {
+            foreach ($values as $value) {
+                $content .= sprintf("%-{$max}s %s\r\n", $this->beautifyHeaderName($name).':', $value);
+            }
+        }
+
+        return $content;
+    }
+
+    private function beautifyHeaderName($name)
+    {
+        return preg_replace_callback('/\-(.)/', array($this, 'beautifyCallback'), ucfirst($name));
+    }
+
+    private function beautifyCallback($match)
+    {
+        return '-'.strtoupper($match[1]);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseInterface.php
new file mode 100644
index 000000000..c99b5f7d1
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseInterface.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace OAuth2;
+
+/**
+ * Interface which represents an object response.  Meant to handle and display the proper OAuth2 Responses
+ * for errors and successes
+ *
+ * @see OAuth2\Response
+ */
+interface ResponseInterface
+{
+    public function addParameters(array $parameters);
+
+    public function addHttpHeaders(array $httpHeaders);
+
+    public function setStatusCode($statusCode);
+
+    public function setError($statusCode, $name, $description = null, $uri = null);
+
+    public function setRedirect($statusCode, $url, $state = null, $error = null, $errorDescription = null, $errorUri = null);
+
+    public function getParameter($name);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessToken.php
new file mode 100644
index 000000000..98f51218f
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessToken.php
@@ -0,0 +1,194 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+use OAuth2\Storage\AccessTokenInterface as AccessTokenStorageInterface;
+use OAuth2\Storage\RefreshTokenInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class AccessToken implements AccessTokenInterface
+{
+    protected $tokenStorage;
+    protected $refreshStorage;
+    protected $config;
+
+    /**
+     * @param OAuth2\Storage\AccessTokenInterface  $tokenStorage   REQUIRED Storage class for saving access token information
+     * @param OAuth2\Storage\RefreshTokenInterface $refreshStorage OPTIONAL Storage class for saving refresh token information
+     * @param array                                $config         OPTIONAL Configuration options for the server
+     *                                                             <code>
+     *                                                             $config = array(
+     *                                                             'token_type' => 'bearer',              // token type identifier
+     *                                                             'access_lifetime' => 3600,             // time before access token expires
+     *                                                             'refresh_token_lifetime' => 1209600,   // time before refresh token expires
+     *                                                             );
+     *                                                             </endcode>
+     */
+    public function __construct(AccessTokenStorageInterface $tokenStorage, RefreshTokenInterface $refreshStorage = null, array $config = array())
+    {
+        $this->tokenStorage = $tokenStorage;
+        $this->refreshStorage = $refreshStorage;
+
+        $this->config = array_merge(array(
+            'token_type'             => 'bearer',
+            'access_lifetime'        => 3600,
+            'refresh_token_lifetime' => 1209600,
+        ), $config);
+    }
+
+    public function getAuthorizeResponse($params, $user_id = null)
+    {
+        // build the URL to redirect to
+        $result = array('query' => array());
+
+        $params += array('scope' => null, 'state' => null);
+
+        /*
+         * a refresh token MUST NOT be included in the fragment
+         *
+         * @see http://tools.ietf.org/html/rfc6749#section-4.2.2
+         */
+        $includeRefreshToken = false;
+        $result["fragment"] = $this->createAccessToken($params['client_id'], $user_id, $params['scope'], $includeRefreshToken);
+
+        if (isset($params['state'])) {
+            $result["fragment"]["state"] = $params['state'];
+        }
+
+        return array($params['redirect_uri'], $result);
+    }
+
+    /**
+     * Handle the creation of access token, also issue refresh token if supported / desirable.
+     *
+     * @param $client_id                client identifier related to the access token.
+     * @param $user_id                  user ID associated with the access token
+     * @param $scope                    OPTIONAL scopes to be stored in space-separated string.
+     * @param bool $includeRefreshToken if true, a new refresh_token will be added to the response
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-5
+     * @ingroup oauth2_section_5
+     */
+    public function createAccessToken($client_id, $user_id, $scope = null, $includeRefreshToken = true)
+    {
+        $token = array(
+            "access_token" => $this->generateAccessToken(),
+            "expires_in" => $this->config['access_lifetime'],
+            "token_type" => $this->config['token_type'],
+            "scope" => $scope
+        );
+
+        $this->tokenStorage->setAccessToken($token["access_token"], $client_id, $user_id, $this->config['access_lifetime'] ? time() + $this->config['access_lifetime'] : null, $scope);
+
+        /*
+         * Issue a refresh token also, if we support them
+         *
+         * Refresh Tokens are considered supported if an instance of OAuth2\Storage\RefreshTokenInterface
+         * is supplied in the constructor
+         */
+        if ($includeRefreshToken && $this->refreshStorage) {
+            $token["refresh_token"] = $this->generateRefreshToken();
+            $expires = 0;
+            if ($this->config['refresh_token_lifetime'] > 0) {
+                $expires = time() + $this->config['refresh_token_lifetime'];
+            }
+            $this->refreshStorage->setRefreshToken($token['refresh_token'], $client_id, $user_id, $expires, $scope);
+        }
+
+        return $token;
+    }
+
+    /**
+     * Generates an unique access token.
+     *
+     * Implementing classes may want to override this function to implement
+     * other access token generation schemes.
+     *
+     * @return
+     * An unique access token.
+     *
+     * @ingroup oauth2_section_4
+     */
+    protected function generateAccessToken()
+    {
+        if (function_exists('openssl_random_pseudo_bytes')) {
+            $randomData = openssl_random_pseudo_bytes(20);
+            if ($randomData !== false && strlen($randomData) === 20) {
+                return bin2hex($randomData);
+            }
+        }
+        if (function_exists('mcrypt_create_iv')) {
+            $randomData = mcrypt_create_iv(20, MCRYPT_DEV_URANDOM);
+            if ($randomData !== false && strlen($randomData) === 20) {
+                return bin2hex($randomData);
+            }
+        }
+        if (@file_exists('/dev/urandom')) { // Get 100 bytes of random data
+            $randomData = file_get_contents('/dev/urandom', false, null, 0, 20);
+            if ($randomData !== false && strlen($randomData) === 20) {
+                return bin2hex($randomData);
+            }
+        }
+        // Last resort which you probably should just get rid of:
+        $randomData = mt_rand() . mt_rand() . mt_rand() . mt_rand() . microtime(true) . uniqid(mt_rand(), true);
+
+        return substr(hash('sha512', $randomData), 0, 40);
+    }
+
+    /**
+     * Generates an unique refresh token
+     *
+     * Implementing classes may want to override this function to implement
+     * other refresh token generation schemes.
+     *
+     * @return
+     * An unique refresh.
+     *
+     * @ingroup oauth2_section_4
+     * @see OAuth2::generateAccessToken()
+     */
+    protected function generateRefreshToken()
+    {
+        return $this->generateAccessToken(); // let's reuse the same scheme for token generation
+    }
+
+    /**
+     * Handle the revoking of refresh tokens, and access tokens if supported / desirable
+     * RFC7009 specifies that "If the server is unable to locate the token using
+     * the given hint, it MUST extend its search across all of its supported token types"
+     *
+     * @param $token
+     * @param null $tokenTypeHint
+     * @return boolean
+     */
+    public function revokeToken($token, $tokenTypeHint = null)
+    {
+        if ($tokenTypeHint == 'refresh_token') {
+            if ($this->refreshStorage && $revoked = $this->refreshStorage->unsetRefreshToken($token)) {
+                return true;
+            }
+        }
+
+        /** @TODO remove in v2 */
+        if (!method_exists($this->tokenStorage, 'unsetAccessToken')) {
+            throw new \RuntimeException(
+                sprintf('Token storage %s must implement unsetAccessToken method', get_class($this->tokenStorage)
+            ));
+        }
+
+        $revoked = $this->tokenStorage->unsetAccessToken($token);
+
+        // if a typehint is supplied and fails, try other storages 
+        // @see https://tools.ietf.org/html/rfc7009#section-2.1
+        if (!$revoked && $tokenTypeHint != 'refresh_token') {
+            if ($this->refreshStorage) {
+                $revoked = $this->refreshStorage->unsetRefreshToken($token);
+            }
+        }
+
+        return $revoked;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessTokenInterface.php
new file mode 100644
index 000000000..4bd3928d8
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AccessTokenInterface.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AccessTokenInterface extends ResponseTypeInterface
+{
+    /**
+     * Handle the creation of access token, also issue refresh token if supported / desirable.
+     *
+     * @param $client_id                client identifier related to the access token.
+     * @param $user_id                  user ID associated with the access token
+     * @param $scope                    OPTONAL scopes to be stored in space-separated string.
+     * @param bool $includeRefreshToken if true, a new refresh_token will be added to the response
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-5
+     * @ingroup oauth2_section_5
+     */
+    public function createAccessToken($client_id, $user_id, $scope = null, $includeRefreshToken = true);
+
+    /**
+     * Handle the revoking of refresh tokens, and access tokens if supported / desirable
+     *
+     * @param $token
+     * @param $tokenTypeHint
+     * @return mixed
+     *
+     * @todo v2.0 include this method in interface. Omitted to maintain BC in v1.x
+     */
+    //public function revokeToken($token, $tokenTypeHint);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCode.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCode.php
new file mode 100644
index 000000000..52aeb4be5
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCode.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+use OAuth2\Storage\AuthorizationCodeInterface as AuthorizationCodeStorageInterface;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class AuthorizationCode implements AuthorizationCodeInterface
+{
+    protected $storage;
+    protected $config;
+
+    public function __construct(AuthorizationCodeStorageInterface $storage, array $config = array())
+    {
+        $this->storage = $storage;
+        $this->config = array_merge(array(
+            'enforce_redirect' => false,
+            'auth_code_lifetime' => 30,
+        ), $config);
+    }
+
+    public function getAuthorizeResponse($params, $user_id = null)
+    {
+        // build the URL to redirect to
+        $result = array('query' => array());
+
+        $params += array('scope' => null, 'state' => null);
+
+        $result['query']['code'] = $this->createAuthorizationCode($params['client_id'], $user_id, $params['redirect_uri'], $params['scope']);
+
+        if (isset($params['state'])) {
+            $result['query']['state'] = $params['state'];
+        }
+
+        return array($params['redirect_uri'], $result);
+    }
+
+    /**
+     * Handle the creation of the authorization code.
+     *
+     * @param $client_id
+     * Client identifier related to the authorization code
+     * @param $user_id
+     * User ID associated with the authorization code
+     * @param $redirect_uri
+     * An absolute URI to which the authorization server will redirect the
+     * user-agent to when the end-user authorization step is completed.
+     * @param $scope
+     * (optional) Scopes to be stored in space-separated string.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @ingroup oauth2_section_4
+     */
+    public function createAuthorizationCode($client_id, $user_id, $redirect_uri, $scope = null)
+    {
+        $code = $this->generateAuthorizationCode();
+        $this->storage->setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, time() + $this->config['auth_code_lifetime'], $scope);
+
+        return $code;
+    }
+
+    /**
+     * @return
+     * TRUE if the grant type requires a redirect_uri, FALSE if not
+     */
+    public function enforceRedirect()
+    {
+        return $this->config['enforce_redirect'];
+    }
+
+    /**
+     * Generates an unique auth code.
+     *
+     * Implementing classes may want to override this function to implement
+     * other auth code generation schemes.
+     *
+     * @return
+     * An unique auth code.
+     *
+     * @ingroup oauth2_section_4
+     */
+    protected function generateAuthorizationCode()
+    {
+        $tokenLen = 40;
+        if (function_exists('openssl_random_pseudo_bytes')) {
+            $randomData = openssl_random_pseudo_bytes(100);
+        } elseif (function_exists('mcrypt_create_iv')) {
+            $randomData = mcrypt_create_iv(100, MCRYPT_DEV_URANDOM);
+        } elseif (@file_exists('/dev/urandom')) { // Get 100 bytes of random data
+            $randomData = file_get_contents('/dev/urandom', false, null, 0, 100) . uniqid(mt_rand(), true);
+        } else {
+            $randomData = mt_rand() . mt_rand() . mt_rand() . mt_rand() . microtime(true) . uniqid(mt_rand(), true);
+        }
+
+        return substr(hash('sha512', $randomData), 0, $tokenLen);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCodeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCodeInterface.php
new file mode 100644
index 000000000..df777e221
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/AuthorizationCodeInterface.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AuthorizationCodeInterface extends ResponseTypeInterface
+{
+    /**
+     * @return
+     * TRUE if the grant type requires a redirect_uri, FALSE if not
+     */
+    public function enforceRedirect();
+
+    /**
+     * Handle the creation of the authorization code.
+     *
+     * @param $client_id    client identifier related to the authorization code
+     * @param $user_id      user id associated with the authorization code
+     * @param $redirect_uri an absolute URI to which the authorization server will redirect the
+     *                      user-agent to when the end-user authorization step is completed.
+     * @param $scope        OPTIONAL scopes to be stored in space-separated string.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @ingroup oauth2_section_4
+     */
+    public function createAuthorizationCode($client_id, $user_id, $redirect_uri, $scope = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/JwtAccessToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/JwtAccessToken.php
new file mode 100644
index 000000000..3942fe41e
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/JwtAccessToken.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+use OAuth2\Encryption\EncryptionInterface;
+use OAuth2\Encryption\Jwt;
+use OAuth2\Storage\AccessTokenInterface as AccessTokenStorageInterface;
+use OAuth2\Storage\RefreshTokenInterface;
+use OAuth2\Storage\PublicKeyInterface;
+use OAuth2\Storage\Memory;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class JwtAccessToken extends AccessToken
+{
+    protected $publicKeyStorage;
+    protected $encryptionUtil;
+
+    /**
+     * @param $config
+     *  - store_encrypted_token_string (bool true)
+     *       whether the entire encrypted string is stored,
+     *       or just the token ID is stored
+     */
+    public function __construct(PublicKeyInterface $publicKeyStorage = null, AccessTokenStorageInterface $tokenStorage = null, RefreshTokenInterface $refreshStorage = null, array $config = array(), EncryptionInterface $encryptionUtil = null)
+    {
+        $this->publicKeyStorage = $publicKeyStorage;
+        $config = array_merge(array(
+            'store_encrypted_token_string' => true,
+            'issuer' => ''
+        ), $config);
+        if (is_null($tokenStorage)) {
+            // a pass-thru, so we can call the parent constructor
+            $tokenStorage = new Memory();
+        }
+        if (is_null($encryptionUtil)) {
+            $encryptionUtil = new Jwt();
+        }
+        $this->encryptionUtil = $encryptionUtil;
+        parent::__construct($tokenStorage, $refreshStorage, $config);
+    }
+
+    /**
+     * Handle the creation of access token, also issue refresh token if supported / desirable.
+     *
+     * @param $client_id
+     * Client identifier related to the access token.
+     * @param $user_id
+     * User ID associated with the access token
+     * @param $scope
+     * (optional) Scopes to be stored in space-separated string.
+     * @param bool $includeRefreshToken
+     *                                  If true, a new refresh_token will be added to the response
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-5
+     * @ingroup oauth2_section_5
+     */
+    public function createAccessToken($client_id, $user_id, $scope = null, $includeRefreshToken = true)
+    {
+        // token to encrypt
+        $expires = time() + $this->config['access_lifetime'];
+        $id = $this->generateAccessToken();
+        $jwtAccessToken = array(
+            'id'         => $id, // for BC (see #591)
+            'jti'        => $id,
+            'iss'        => $this->config['issuer'],
+            'aud'        => $client_id,
+            'sub'        => $user_id,
+            'exp'        => $expires,
+            'iat'        => time(),
+            'token_type' => $this->config['token_type'],
+            'scope'      => $scope
+        );
+
+        /*
+         * Encode the token data into a single access_token string
+         */
+        $access_token = $this->encodeToken($jwtAccessToken, $client_id);
+
+        /*
+         * Save the token to a secondary storage.  This is implemented on the
+         * OAuth2\Storage\JwtAccessToken side, and will not actually store anything,
+         * if no secondary storage has been supplied
+         */
+        $token_to_store = $this->config['store_encrypted_token_string'] ? $access_token : $jwtAccessToken['id'];
+        $this->tokenStorage->setAccessToken($token_to_store, $client_id, $user_id, $this->config['access_lifetime'] ? time() + $this->config['access_lifetime'] : null, $scope);
+
+        // token to return to the client
+        $token = array(
+            'access_token' => $access_token,
+            'expires_in' => $this->config['access_lifetime'],
+            'token_type' => $this->config['token_type'],
+            'scope' => $scope
+        );
+
+        /*
+         * Issue a refresh token also, if we support them
+         *
+         * Refresh Tokens are considered supported if an instance of OAuth2\Storage\RefreshTokenInterface
+         * is supplied in the constructor
+         */
+        if ($includeRefreshToken && $this->refreshStorage) {
+            $refresh_token = $this->generateRefreshToken();
+            $expires = 0;
+            if ($this->config['refresh_token_lifetime'] > 0) {
+                $expires = time() + $this->config['refresh_token_lifetime'];
+            }
+            $this->refreshStorage->setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope);
+            $token['refresh_token'] = $refresh_token;
+        }
+
+        return $token;
+    }
+
+    protected function encodeToken(array $token, $client_id = null)
+    {
+        $private_key = $this->publicKeyStorage->getPrivateKey($client_id);
+        $algorithm   = $this->publicKeyStorage->getEncryptionAlgorithm($client_id);
+
+        return $this->encryptionUtil->encode($token, $private_key, $algorithm);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/ResponseTypeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/ResponseTypeInterface.php
new file mode 100644
index 000000000..f8e26a5b0
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ResponseType/ResponseTypeInterface.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace OAuth2\ResponseType;
+
+interface ResponseTypeInterface
+{
+    public function getAuthorizeResponse($params, $user_id = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Scope.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Scope.php
new file mode 100644
index 000000000..c44350bfd
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Scope.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace OAuth2;
+
+use OAuth2\Storage\Memory;
+use OAuth2\Storage\ScopeInterface as ScopeStorageInterface;
+
+/**
+* @see OAuth2\ScopeInterface
+*/
+class Scope implements ScopeInterface
+{
+    protected $storage;
+
+    /**
+     * @param mixed @storage
+     * Either an array of supported scopes, or an instance of OAuth2\Storage\ScopeInterface
+     */
+    public function __construct($storage = null)
+    {
+        if (is_null($storage) || is_array($storage)) {
+            $storage = new Memory((array) $storage);
+        }
+
+        if (!$storage instanceof ScopeStorageInterface) {
+            throw new \InvalidArgumentException("Argument 1 to OAuth2\Scope must be null, an array, or instance of OAuth2\Storage\ScopeInterface");
+        }
+
+        $this->storage = $storage;
+    }
+
+    /**
+     * Check if everything in required scope is contained in available scope.
+     *
+     * @param $required_scope
+     * A space-separated string of scopes.
+     *
+     * @return
+     * TRUE if everything in required scope is contained in available scope,
+     * and FALSE if it isn't.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-7
+     *
+     * @ingroup oauth2_section_7
+     */
+    public function checkScope($required_scope, $available_scope)
+    {
+        $required_scope = explode(' ', trim($required_scope));
+        $available_scope = explode(' ', trim($available_scope));
+
+        return (count(array_diff($required_scope, $available_scope)) == 0);
+    }
+
+    /**
+     * Check if the provided scope exists in storage.
+     *
+     * @param $scope
+     * A space-separated string of scopes.
+     *
+     * @return
+     * TRUE if it exists, FALSE otherwise.
+     */
+    public function scopeExists($scope)
+    {
+        // Check reserved scopes first.
+        $scope = explode(' ', trim($scope));
+        $reservedScope = $this->getReservedScopes();
+        $nonReservedScopes = array_diff($scope, $reservedScope);
+        if (count($nonReservedScopes) == 0) {
+            return true;
+        } else {
+            // Check the storage for non-reserved scopes.
+            $nonReservedScopes = implode(' ', $nonReservedScopes);
+
+            return $this->storage->scopeExists($nonReservedScopes);
+        }
+    }
+
+    public function getScopeFromRequest(RequestInterface $request)
+    {
+        // "scope" is valid if passed in either POST or QUERY
+        return $request->request('scope', $request->query('scope'));
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+        return $this->storage->getDefaultScope($client_id);
+    }
+
+    /**
+     * Get reserved scopes needed by the server.
+     *
+     * In case OpenID Connect is used, these scopes must include:
+     * 'openid', offline_access'.
+     *
+     * @return
+     * An array of reserved scopes.
+     */
+    public function getReservedScopes()
+    {
+        return array('openid', 'offline_access');
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/ScopeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ScopeInterface.php
new file mode 100644
index 000000000..5b60f9aee
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/ScopeInterface.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace OAuth2;
+
+use OAuth2\Storage\ScopeInterface as ScopeStorageInterface;
+
+/**
+ * Class to handle scope implementation logic
+ *
+ * @see OAuth2\Storage\ScopeInterface
+ */
+interface ScopeInterface extends ScopeStorageInterface
+{
+    /**
+     * Check if everything in required scope is contained in available scope.
+     *
+     * @param $required_scope
+     * A space-separated string of scopes.
+     *
+     * @return
+     * TRUE if everything in required scope is contained in available scope,
+     * and FALSE if it isn't.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-7
+     *
+     * @ingroup oauth2_section_7
+     */
+    public function checkScope($required_scope, $available_scope);
+
+    /**
+     * Return scope info from request
+     *
+     * @param OAuth2\RequestInterface
+     * Request object to check
+     *
+     * @return
+     * string representation of requested scope
+     */
+    public function getScopeFromRequest(RequestInterface $request);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Server.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Server.php
new file mode 100644
index 000000000..9cfcb83a5
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Server.php
@@ -0,0 +1,879 @@
+<?php
+
+namespace OAuth2;
+
+use OAuth2\Controller\ResourceControllerInterface;
+use OAuth2\Controller\ResourceController;
+use OAuth2\OpenID\Controller\UserInfoControllerInterface;
+use OAuth2\OpenID\Controller\UserInfoController;
+use OAuth2\OpenID\Controller\AuthorizeController as OpenIDAuthorizeController;
+use OAuth2\OpenID\ResponseType\AuthorizationCode as OpenIDAuthorizationCodeResponseType;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+use OAuth2\OpenID\GrantType\AuthorizationCode as OpenIDAuthorizationCodeGrantType;
+use OAuth2\Controller\AuthorizeControllerInterface;
+use OAuth2\Controller\AuthorizeController;
+use OAuth2\Controller\TokenControllerInterface;
+use OAuth2\Controller\TokenController;
+use OAuth2\ClientAssertionType\ClientAssertionTypeInterface;
+use OAuth2\ClientAssertionType\HttpBasic;
+use OAuth2\ResponseType\ResponseTypeInterface;
+use OAuth2\ResponseType\AuthorizationCode as AuthorizationCodeResponseType;
+use OAuth2\ResponseType\AccessToken;
+use OAuth2\ResponseType\JwtAccessToken;
+use OAuth2\OpenID\ResponseType\CodeIdToken;
+use OAuth2\OpenID\ResponseType\IdToken;
+use OAuth2\OpenID\ResponseType\IdTokenToken;
+use OAuth2\TokenType\TokenTypeInterface;
+use OAuth2\TokenType\Bearer;
+use OAuth2\GrantType\GrantTypeInterface;
+use OAuth2\GrantType\UserCredentials;
+use OAuth2\GrantType\ClientCredentials;
+use OAuth2\GrantType\RefreshToken;
+use OAuth2\GrantType\AuthorizationCode;
+use OAuth2\Storage\JwtAccessToken as JwtAccessTokenStorage;
+use OAuth2\Storage\JwtAccessTokenInterface;
+
+/**
+* Server class for OAuth2
+* This class serves as a convience class which wraps the other Controller classes
+*
+* @see OAuth2\Controller\ResourceController
+* @see OAuth2\Controller\AuthorizeController
+* @see OAuth2\Controller\TokenController
+*/
+class Server implements ResourceControllerInterface,
+    AuthorizeControllerInterface,
+    TokenControllerInterface,
+    UserInfoControllerInterface
+{
+    // misc properties
+    /**
+     * @var Response
+     */
+    protected $response;
+
+    /**
+     * @var array
+     */
+    protected $config;
+
+    /**
+     * @var array
+     */
+    protected $storages;
+
+    // servers
+    /**
+     * @var AuthorizeControllerInterface
+     */
+    protected $authorizeController;
+
+    /**
+     * @var TokenControllerInterface
+     */
+    protected $tokenController;
+
+    /**
+     * @var ResourceControllerInterface
+     */
+    protected $resourceController;
+
+    /**
+     * @var UserInfoControllerInterface
+     */
+    protected $userInfoController;
+
+    // config classes
+    protected $grantTypes;
+    protected $responseTypes;
+    protected $tokenType;
+
+    /**
+     * @var ScopeInterface
+     */
+    protected $scopeUtil;
+    protected $clientAssertionType;
+
+    protected $storageMap = array(
+        'access_token' => 'OAuth2\Storage\AccessTokenInterface',
+        'authorization_code' => 'OAuth2\Storage\AuthorizationCodeInterface',
+        'client_credentials' => 'OAuth2\Storage\ClientCredentialsInterface',
+        'client' => 'OAuth2\Storage\ClientInterface',
+        'refresh_token' => 'OAuth2\Storage\RefreshTokenInterface',
+        'user_credentials' => 'OAuth2\Storage\UserCredentialsInterface',
+        'user_claims' => 'OAuth2\OpenID\Storage\UserClaimsInterface',
+        'public_key' => 'OAuth2\Storage\PublicKeyInterface',
+        'jwt_bearer' => 'OAuth2\Storage\JWTBearerInterface',
+        'scope' => 'OAuth2\Storage\ScopeInterface',
+    );
+
+    protected $responseTypeMap = array(
+        'token' => 'OAuth2\ResponseType\AccessTokenInterface',
+        'code' => 'OAuth2\ResponseType\AuthorizationCodeInterface',
+        'id_token' => 'OAuth2\OpenID\ResponseType\IdTokenInterface',
+        'id_token token' => 'OAuth2\OpenID\ResponseType\IdTokenTokenInterface',
+        'code id_token' => 'OAuth2\OpenID\ResponseType\CodeIdTokenInterface',
+    );
+
+    /**
+     * @param mixed                                                   $storage             (array or OAuth2\Storage) - single object or array of objects implementing the
+     *                                                                                     required storage types (ClientCredentialsInterface and AccessTokenInterface as a minimum)
+     * @param array                                                   $config              specify a different token lifetime, token header name, etc
+     * @param array                                                   $grantTypes          An array of OAuth2\GrantType\GrantTypeInterface to use for granting access tokens
+     * @param array                                                   $responseTypes       Response types to use.  array keys should be "code" and and "token" for
+     *                                                                                     Access Token and Authorization Code response types
+     * @param \OAuth2\TokenType\TokenTypeInterface                     $tokenType           The token type object to use. Valid token types are "bearer" and "mac"
+     * @param \OAuth2\ScopeInterface                                   $scopeUtil           The scope utility class to use to validate scope
+     * @param \OAuth2\ClientAssertionType\ClientAssertionTypeInterface $clientAssertionType The method in which to verify the client identity.  Default is HttpBasic
+     *
+     * @ingroup oauth2_section_7
+     */
+    public function __construct($storage = array(), array $config = array(), array $grantTypes = array(), array $responseTypes = array(), TokenTypeInterface $tokenType = null, ScopeInterface $scopeUtil = null, ClientAssertionTypeInterface $clientAssertionType = null)
+    {
+        $storage = is_array($storage) ? $storage : array($storage);
+        $this->storages = array();
+        foreach ($storage as $key => $service) {
+            $this->addStorage($service, $key);
+        }
+
+        // merge all config values.  These get passed to our controller objects
+        $this->config = array_merge(array(
+            'use_jwt_access_tokens'        => false,
+            'store_encrypted_token_string' => true,
+            'use_openid_connect'       => false,
+            'id_lifetime'              => 3600,
+            'access_lifetime'          => 3600,
+            'www_realm'                => 'Service',
+            'token_param_name'         => 'access_token',
+            'token_bearer_header_name' => 'Bearer',
+            'enforce_state'            => true,
+            'require_exact_redirect_uri' => true,
+            'allow_implicit'           => false,
+            'allow_credentials_in_request_body' => true,
+            'allow_public_clients'     => true,
+            'always_issue_new_refresh_token' => false,
+            'unset_refresh_token_after_use' => true,
+        ), $config);
+
+        foreach ($grantTypes as $key => $grantType) {
+            $this->addGrantType($grantType, $key);
+        }
+
+        foreach ($responseTypes as $key => $responseType) {
+            $this->addResponseType($responseType, $key);
+        }
+
+        $this->tokenType = $tokenType;
+        $this->scopeUtil = $scopeUtil;
+        $this->clientAssertionType = $clientAssertionType;
+
+        if ($this->config['use_openid_connect']) {
+            $this->validateOpenIdConnect();
+        }
+    }
+
+    public function getAuthorizeController()
+    {
+        if (is_null($this->authorizeController)) {
+            $this->authorizeController = $this->createDefaultAuthorizeController();
+        }
+
+        return $this->authorizeController;
+    }
+
+    public function getTokenController()
+    {
+        if (is_null($this->tokenController)) {
+            $this->tokenController = $this->createDefaultTokenController();
+        }
+
+        return $this->tokenController;
+    }
+
+    public function getResourceController()
+    {
+        if (is_null($this->resourceController)) {
+            $this->resourceController = $this->createDefaultResourceController();
+        }
+
+        return $this->resourceController;
+    }
+
+    public function getUserInfoController()
+    {
+        if (is_null($this->userInfoController)) {
+            $this->userInfoController = $this->createDefaultUserInfoController();
+        }
+
+        return $this->userInfoController;
+    }
+
+    /**
+     * every getter deserves a setter
+     *
+     * @param AuthorizeControllerInterface $authorizeController
+     */
+    public function setAuthorizeController(AuthorizeControllerInterface $authorizeController)
+    {
+        $this->authorizeController = $authorizeController;
+    }
+
+    /**
+     * every getter deserves a setter
+     *
+     * @param TokenControllerInterface $tokenController
+     */
+    public function setTokenController(TokenControllerInterface $tokenController)
+    {
+        $this->tokenController = $tokenController;
+    }
+
+    /**
+     * every getter deserves a setter
+     *
+     * @param ResourceControllerInterface $resourceController
+     */
+    public function setResourceController(ResourceControllerInterface $resourceController)
+    {
+        $this->resourceController = $resourceController;
+    }
+
+    /**
+     * every getter deserves a setter
+     *
+     * @param UserInfoControllerInterface $userInfoController
+     */
+    public function setUserInfoController(UserInfoControllerInterface $userInfoController)
+    {
+        $this->userInfoController = $userInfoController;
+    }
+
+    /**
+     * Return claims about the authenticated end-user.
+     * This would be called from the "/UserInfo" endpoint as defined in the spec.
+     *
+     * @param $request - \OAuth2\RequestInterface
+     * Request object to grant access token
+     *
+     * @param $response - \OAuth2\ResponseInterface
+     * Response object containing error messages (failure) or user claims (success)
+     *
+     * @return ResponseInterface
+     *
+     * @throws \InvalidArgumentException
+     * @throws \LogicException
+     *
+     * @see http://openid.net/specs/openid-connect-core-1_0.html#UserInfo
+     */
+    public function handleUserInfoRequest(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $this->getUserInfoController()->handleUserInfoRequest($request, $this->response);
+
+        return $this->response;
+    }
+
+    /**
+     * Grant or deny a requested access token.
+     * This would be called from the "/token" endpoint as defined in the spec.
+     * Obviously, you can call your endpoint whatever you want.
+     *
+     * @param $request - \OAuth2\RequestInterface
+     * Request object to grant access token
+     *
+     * @param $response - \OAuth2\ResponseInterface
+     * Response object containing error messages (failure) or access token (success)
+     *
+     * @return ResponseInterface
+     *
+     * @throws \InvalidArgumentException
+     * @throws \LogicException
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     * @see http://tools.ietf.org/html/rfc6749#section-10.6
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1.3
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function handleTokenRequest(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $this->getTokenController()->handleTokenRequest($request, $this->response);
+
+        return $this->response;
+    }
+
+    public function grantAccessToken(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $value = $this->getTokenController()->grantAccessToken($request, $this->response);
+
+        return $value;
+    }
+
+    /**
+     * Handle a revoke token request
+     * This would be called from the "/revoke" endpoint as defined in the draft Token Revocation spec
+     *
+     * @see https://tools.ietf.org/html/rfc7009#section-2
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return Response|ResponseInterface
+     */
+    public function handleRevokeRequest(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $this->getTokenController()->handleRevokeRequest($request, $this->response);
+
+        return $this->response;
+    }
+
+    /**
+     * Redirect the user appropriately after approval.
+     *
+     * After the user has approved or denied the resource request the
+     * authorization server should call this function to redirect the user
+     * appropriately.
+     *
+     * @param $request
+     * The request should have the follow parameters set in the querystring:
+     * - response_type: The requested response: an access token, an
+     * authorization code, or both.
+     * - client_id: The client identifier as described in Section 2.
+     * - redirect_uri: An absolute URI to which the authorization server
+     * will redirect the user-agent to when the end-user authorization
+     * step is completed.
+     * - scope: (optional) The scope of the resource request expressed as a
+     * list of space-delimited strings.
+     * - state: (optional) An opaque value used by the client to maintain
+     * state between the request and callback.
+     * @param ResponseInterface $response
+     * @param $is_authorized
+     * TRUE or FALSE depending on whether the user authorized the access.
+     * @param $user_id
+     * Identifier of user who authorized the client
+     *
+     * @return Response
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function handleAuthorizeRequest(RequestInterface $request, ResponseInterface $response, $is_authorized, $user_id = null)
+    {
+        $this->response = $response;
+        $this->getAuthorizeController()->handleAuthorizeRequest($request, $this->response, $is_authorized, $user_id);
+
+        return $this->response;
+    }
+
+    /**
+     * Pull the authorization request data out of the HTTP request.
+     * - The redirect_uri is OPTIONAL as per draft 20. But your implementation can enforce it
+     * by setting $config['enforce_redirect'] to true.
+     * - The state is OPTIONAL but recommended to enforce CSRF. Draft 21 states, however, that
+     * CSRF protection is MANDATORY. You can enforce this by setting the $config['enforce_state'] to true.
+     *
+     * The draft specifies that the parameters should be retrieved from GET, override the Response
+     * object to change this
+     *
+     * @return
+     * The authorization parameters so the authorization server can prompt
+     * the user for approval if valid.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1.1
+     * @see http://tools.ietf.org/html/rfc6749#section-10.12
+     *
+     * @ingroup oauth2_section_3
+     */
+    public function validateAuthorizeRequest(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $value = $this->getAuthorizeController()->validateAuthorizeRequest($request, $this->response);
+
+        return $value;
+    }
+
+    public function verifyResourceRequest(RequestInterface $request, ResponseInterface $response = null, $scope = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $value = $this->getResourceController()->verifyResourceRequest($request, $this->response, $scope);
+
+        return $value;
+    }
+
+    public function getAccessTokenData(RequestInterface $request, ResponseInterface $response = null)
+    {
+        $this->response = is_null($response) ? new Response() : $response;
+        $value = $this->getResourceController()->getAccessTokenData($request, $this->response);
+
+        return $value;
+    }
+
+    public function addGrantType(GrantTypeInterface $grantType, $identifier = null)
+    {
+        if (!is_string($identifier)) {
+            $identifier = $grantType->getQuerystringIdentifier();
+        }
+
+        $this->grantTypes[$identifier] = $grantType;
+
+        // persist added grant type down to TokenController
+        if (!is_null($this->tokenController)) {
+            $this->getTokenController()->addGrantType($grantType, $identifier);
+        }
+    }
+
+    /**
+     * Set a storage object for the server
+     *
+     * @param $storage
+     * An object implementing one of the Storage interfaces
+     * @param $key
+     * If null, the storage is set to the key of each storage interface it implements
+     *
+     * @see storageMap
+     */
+    public function addStorage($storage, $key = null)
+    {
+        // if explicitly set to a valid key, do not "magically" set below
+        if (isset($this->storageMap[$key])) {
+            if (!is_null($storage) && !$storage instanceof $this->storageMap[$key]) {
+                throw new \InvalidArgumentException(sprintf('storage of type "%s" must implement interface "%s"', $key, $this->storageMap[$key]));
+            }
+            $this->storages[$key] = $storage;
+
+            // special logic to handle "client" and "client_credentials" strangeness
+            if ($key === 'client' && !isset($this->storages['client_credentials'])) {
+                if ($storage instanceof \OAuth2\Storage\ClientCredentialsInterface) {
+                    $this->storages['client_credentials'] = $storage;
+                }
+            } elseif ($key === 'client_credentials' && !isset($this->storages['client'])) {
+                if ($storage instanceof \OAuth2\Storage\ClientInterface) {
+                    $this->storages['client'] = $storage;
+                }
+            }
+        } elseif (!is_null($key) && !is_numeric($key)) {
+            throw new \InvalidArgumentException(sprintf('unknown storage key "%s", must be one of [%s]', $key, implode(', ', array_keys($this->storageMap))));
+        } else {
+            $set = false;
+            foreach ($this->storageMap as $type => $interface) {
+                if ($storage instanceof $interface) {
+                    $this->storages[$type] = $storage;
+                    $set = true;
+                }
+            }
+
+            if (!$set) {
+                throw new \InvalidArgumentException(sprintf('storage of class "%s" must implement one of [%s]', get_class($storage), implode(', ', $this->storageMap)));
+            }
+        }
+    }
+
+    public function addResponseType(ResponseTypeInterface $responseType, $key = null)
+    {
+        $key = $this->normalizeResponseType($key);
+
+        if (isset($this->responseTypeMap[$key])) {
+            if (!$responseType instanceof $this->responseTypeMap[$key]) {
+                throw new \InvalidArgumentException(sprintf('responseType of type "%s" must implement interface "%s"', $key, $this->responseTypeMap[$key]));
+            }
+            $this->responseTypes[$key] = $responseType;
+        } elseif (!is_null($key) && !is_numeric($key)) {
+            throw new \InvalidArgumentException(sprintf('unknown responseType key "%s", must be one of [%s]', $key, implode(', ', array_keys($this->responseTypeMap))));
+        } else {
+            $set = false;
+            foreach ($this->responseTypeMap as $type => $interface) {
+                if ($responseType instanceof $interface) {
+                    $this->responseTypes[$type] = $responseType;
+                    $set = true;
+                }
+            }
+
+            if (!$set) {
+                throw new \InvalidArgumentException(sprintf('Unknown response type %s.  Please implement one of [%s]', get_class($responseType), implode(', ', $this->responseTypeMap)));
+            }
+        }
+    }
+
+    public function getScopeUtil()
+    {
+        if (!$this->scopeUtil) {
+            $storage = isset($this->storages['scope']) ? $this->storages['scope'] : null;
+            $this->scopeUtil = new Scope($storage);
+        }
+
+        return $this->scopeUtil;
+    }
+
+    /**
+     * every getter deserves a setter
+     *
+     * @param ScopeInterface $scopeUtil
+     */
+    public function setScopeUtil($scopeUtil)
+    {
+        $this->scopeUtil = $scopeUtil;
+    }
+
+    protected function createDefaultAuthorizeController()
+    {
+        if (!isset($this->storages['client'])) {
+            throw new \LogicException('You must supply a storage object implementing \OAuth2\Storage\ClientInterface to use the authorize server');
+        }
+        if (0 == count($this->responseTypes)) {
+            $this->responseTypes = $this->getDefaultResponseTypes();
+        }
+        if ($this->config['use_openid_connect'] && !isset($this->responseTypes['id_token'])) {
+            $this->responseTypes['id_token'] = $this->createDefaultIdTokenResponseType();
+            if ($this->config['allow_implicit']) {
+                $this->responseTypes['id_token token'] = $this->createDefaultIdTokenTokenResponseType();
+            }
+        }
+
+        $config = array_intersect_key($this->config, array_flip(explode(' ', 'allow_implicit enforce_state require_exact_redirect_uri')));
+
+        if ($this->config['use_openid_connect']) {
+            return new OpenIDAuthorizeController($this->storages['client'], $this->responseTypes, $config, $this->getScopeUtil());
+        }
+
+        return new AuthorizeController($this->storages['client'], $this->responseTypes, $config, $this->getScopeUtil());
+    }
+
+    protected function createDefaultTokenController()
+    {
+        if (0 == count($this->grantTypes)) {
+            $this->grantTypes = $this->getDefaultGrantTypes();
+        }
+
+        if (is_null($this->clientAssertionType)) {
+            // see if HttpBasic assertion type is requred.  If so, then create it from storage classes.
+            foreach ($this->grantTypes as $grantType) {
+                if (!$grantType instanceof ClientAssertionTypeInterface) {
+                    if (!isset($this->storages['client_credentials'])) {
+                        throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\ClientCredentialsInterface to use the token server');
+                    }
+                    $config = array_intersect_key($this->config, array_flip(explode(' ', 'allow_credentials_in_request_body allow_public_clients')));
+                    $this->clientAssertionType = new HttpBasic($this->storages['client_credentials'], $config);
+                    break;
+                }
+            }
+        }
+
+        if (!isset($this->storages['client'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\ClientInterface to use the token server');
+        }
+
+        $accessTokenResponseType = $this->getAccessTokenResponseType();
+
+        return new TokenController($accessTokenResponseType, $this->storages['client'], $this->grantTypes, $this->clientAssertionType, $this->getScopeUtil());
+    }
+
+    protected function createDefaultResourceController()
+    {
+        if ($this->config['use_jwt_access_tokens']) {
+            // overwrites access token storage with crypto token storage if "use_jwt_access_tokens" is set
+            if (!isset($this->storages['access_token']) || !$this->storages['access_token'] instanceof JwtAccessTokenInterface) {
+                $this->storages['access_token'] = $this->createDefaultJwtAccessTokenStorage();
+            }
+        } elseif (!isset($this->storages['access_token'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\AccessTokenInterface or use JwtAccessTokens to use the resource server');
+        }
+
+        if (!$this->tokenType) {
+            $this->tokenType = $this->getDefaultTokenType();
+        }
+
+        $config = array_intersect_key($this->config, array('www_realm' => ''));
+
+        return new ResourceController($this->tokenType, $this->storages['access_token'], $config, $this->getScopeUtil());
+    }
+
+    protected function createDefaultUserInfoController()
+    {
+        if ($this->config['use_jwt_access_tokens']) {
+            // overwrites access token storage with crypto token storage if "use_jwt_access_tokens" is set
+            if (!isset($this->storages['access_token']) || !$this->storages['access_token'] instanceof JwtAccessTokenInterface) {
+                $this->storages['access_token'] = $this->createDefaultJwtAccessTokenStorage();
+            }
+        } elseif (!isset($this->storages['access_token'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\AccessTokenInterface or use JwtAccessTokens to use the UserInfo server');
+        }
+
+        if (!isset($this->storages['user_claims'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\OpenID\Storage\UserClaimsInterface to use the UserInfo server');
+        }
+
+        if (!$this->tokenType) {
+            $this->tokenType = $this->getDefaultTokenType();
+        }
+
+        $config = array_intersect_key($this->config, array('www_realm' => ''));
+
+        return new UserInfoController($this->tokenType, $this->storages['access_token'], $this->storages['user_claims'], $config, $this->getScopeUtil());
+    }
+
+    protected function getDefaultTokenType()
+    {
+        $config = array_intersect_key($this->config, array_flip(explode(' ', 'token_param_name token_bearer_header_name')));
+
+        return new Bearer($config);
+    }
+
+    protected function getDefaultResponseTypes()
+    {
+        $responseTypes = array();
+
+        if ($this->config['allow_implicit']) {
+            $responseTypes['token'] = $this->getAccessTokenResponseType();
+        }
+
+        if ($this->config['use_openid_connect']) {
+            $responseTypes['id_token'] = $this->getIdTokenResponseType();
+            if ($this->config['allow_implicit']) {
+                $responseTypes['id_token token'] = $this->getIdTokenTokenResponseType();
+            }
+        }
+
+        if (isset($this->storages['authorization_code'])) {
+            $config = array_intersect_key($this->config, array_flip(explode(' ', 'enforce_redirect auth_code_lifetime')));
+            if ($this->config['use_openid_connect']) {
+                if (!$this->storages['authorization_code'] instanceof OpenIDAuthorizationCodeInterface) {
+                    throw new \LogicException('Your authorization_code storage must implement OAuth2\OpenID\Storage\AuthorizationCodeInterface to work when "use_openid_connect" is true');
+                }
+                $responseTypes['code'] = new OpenIDAuthorizationCodeResponseType($this->storages['authorization_code'], $config);
+                $responseTypes['code id_token'] = new CodeIdToken($responseTypes['code'], $responseTypes['id_token']);
+            } else {
+                $responseTypes['code'] = new AuthorizationCodeResponseType($this->storages['authorization_code'], $config);
+            }
+        }
+
+        if (count($responseTypes) == 0) {
+            throw new \LogicException('You must supply an array of response_types in the constructor or implement a OAuth2\Storage\AuthorizationCodeInterface storage object or set "allow_implicit" to true and implement a OAuth2\Storage\AccessTokenInterface storage object');
+        }
+
+        return $responseTypes;
+    }
+
+    protected function getDefaultGrantTypes()
+    {
+        $grantTypes = array();
+
+        if (isset($this->storages['user_credentials'])) {
+            $grantTypes['password'] = new UserCredentials($this->storages['user_credentials']);
+        }
+
+        if (isset($this->storages['client_credentials'])) {
+            $config = array_intersect_key($this->config, array('allow_credentials_in_request_body' => ''));
+            $grantTypes['client_credentials'] = new ClientCredentials($this->storages['client_credentials'], $config);
+        }
+
+        if (isset($this->storages['refresh_token'])) {
+            $config = array_intersect_key($this->config, array_flip(explode(' ', 'always_issue_new_refresh_token unset_refresh_token_after_use')));
+            $grantTypes['refresh_token'] = new RefreshToken($this->storages['refresh_token'], $config);
+        }
+
+        if (isset($this->storages['authorization_code'])) {
+            if ($this->config['use_openid_connect']) {
+                if (!$this->storages['authorization_code'] instanceof OpenIDAuthorizationCodeInterface) {
+                    throw new \LogicException('Your authorization_code storage must implement OAuth2\OpenID\Storage\AuthorizationCodeInterface to work when "use_openid_connect" is true');
+                }
+                $grantTypes['authorization_code'] = new OpenIDAuthorizationCodeGrantType($this->storages['authorization_code']);
+            } else {
+                $grantTypes['authorization_code'] = new AuthorizationCode($this->storages['authorization_code']);
+            }
+        }
+
+        if (count($grantTypes) == 0) {
+            throw new \LogicException('Unable to build default grant types - You must supply an array of grant_types in the constructor');
+        }
+
+        return $grantTypes;
+    }
+
+    protected function getAccessTokenResponseType()
+    {
+        if (isset($this->responseTypes['token'])) {
+            return $this->responseTypes['token'];
+        }
+
+        if ($this->config['use_jwt_access_tokens']) {
+            return $this->createDefaultJwtAccessTokenResponseType();
+        }
+
+        return $this->createDefaultAccessTokenResponseType();
+    }
+
+    protected function getIdTokenResponseType()
+    {
+        if (isset($this->responseTypes['id_token'])) {
+            return $this->responseTypes['id_token'];
+        }
+
+        return $this->createDefaultIdTokenResponseType();
+    }
+
+    protected function getIdTokenTokenResponseType()
+    {
+        if (isset($this->responseTypes['id_token token'])) {
+            return $this->responseTypes['id_token token'];
+        }
+
+        return $this->createDefaultIdTokenTokenResponseType();
+    }
+
+    /**
+     * For Resource Controller
+     */
+    protected function createDefaultJwtAccessTokenStorage()
+    {
+        if (!isset($this->storages['public_key'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\PublicKeyInterface to use crypto tokens');
+        }
+        $tokenStorage = null;
+        if (!empty($this->config['store_encrypted_token_string']) && isset($this->storages['access_token'])) {
+            $tokenStorage = $this->storages['access_token'];
+        }
+        // wrap the access token storage as required.
+        return new JwtAccessTokenStorage($this->storages['public_key'], $tokenStorage);
+    }
+
+    /**
+     * For Authorize and Token Controllers
+     */
+    protected function createDefaultJwtAccessTokenResponseType()
+    {
+        if (!isset($this->storages['public_key'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\PublicKeyInterface to use crypto tokens');
+        }
+
+        $tokenStorage = null;
+        if (isset($this->storages['access_token'])) {
+            $tokenStorage = $this->storages['access_token'];
+        }
+
+        $refreshStorage = null;
+        if (isset($this->storages['refresh_token'])) {
+            $refreshStorage = $this->storages['refresh_token'];
+        }
+
+        $config = array_intersect_key($this->config, array_flip(explode(' ', 'store_encrypted_token_string issuer access_lifetime refresh_token_lifetime')));
+
+        return new JwtAccessToken($this->storages['public_key'], $tokenStorage, $refreshStorage, $config);
+    }
+
+    protected function createDefaultAccessTokenResponseType()
+    {
+        if (!isset($this->storages['access_token'])) {
+            throw new \LogicException('You must supply a response type implementing OAuth2\ResponseType\AccessTokenInterface, or a storage object implementing OAuth2\Storage\AccessTokenInterface to use the token server');
+        }
+
+        $refreshStorage = null;
+        if (isset($this->storages['refresh_token'])) {
+            $refreshStorage = $this->storages['refresh_token'];
+        }
+
+        $config = array_intersect_key($this->config, array_flip(explode(' ', 'access_lifetime refresh_token_lifetime')));
+        $config['token_type'] = $this->tokenType ? $this->tokenType->getTokenType() :  $this->getDefaultTokenType()->getTokenType();
+
+        return new AccessToken($this->storages['access_token'], $refreshStorage, $config);
+    }
+
+    protected function createDefaultIdTokenResponseType()
+    {
+        if (!isset($this->storages['user_claims'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\OpenID\Storage\UserClaimsInterface to use openid connect');
+        }
+        if (!isset($this->storages['public_key'])) {
+            throw new \LogicException('You must supply a storage object implementing OAuth2\Storage\PublicKeyInterface to use openid connect');
+        }
+
+        $config = array_intersect_key($this->config, array_flip(explode(' ', 'issuer id_lifetime')));
+
+        return new IdToken($this->storages['user_claims'], $this->storages['public_key'], $config);
+    }
+
+    protected function createDefaultIdTokenTokenResponseType()
+    {
+        return new IdTokenToken($this->getAccessTokenResponseType(), $this->getIdTokenResponseType());
+    }
+
+    protected function validateOpenIdConnect()
+    {
+        $authCodeGrant = $this->getGrantType('authorization_code');
+        if (!empty($authCodeGrant) && !$authCodeGrant instanceof OpenIDAuthorizationCodeGrantType) {
+            throw new \InvalidArgumentException('You have enabled OpenID Connect, but supplied a grant type that does not support it.');
+        }
+    }
+
+    protected function normalizeResponseType($name)
+    {
+        // for multiple-valued response types - make them alphabetical
+        if (!empty($name) && false !== strpos($name, ' ')) {
+            $types = explode(' ', $name);
+            sort($types);
+            $name = implode(' ', $types);
+        }
+
+        return $name;
+    }
+
+    public function getResponse()
+    {
+        return $this->response;
+    }
+
+    public function getStorages()
+    {
+        return $this->storages;
+    }
+
+    public function getStorage($name)
+    {
+        return isset($this->storages[$name]) ? $this->storages[$name] : null;
+    }
+
+    public function getGrantTypes()
+    {
+        return $this->grantTypes;
+    }
+
+    public function getGrantType($name)
+    {
+        return isset($this->grantTypes[$name]) ? $this->grantTypes[$name] : null;
+    }
+
+    public function getResponseTypes()
+    {
+        return $this->responseTypes;
+    }
+
+    public function getResponseType($name)
+    {
+        // for multiple-valued response types - make them alphabetical
+        $name = $this->normalizeResponseType($name);
+
+        return isset($this->responseTypes[$name]) ? $this->responseTypes[$name] : null;
+    }
+
+    public function getTokenType()
+    {
+        return $this->tokenType;
+    }
+
+    public function getClientAssertionType()
+    {
+        return $this->clientAssertionType;
+    }
+
+    public function setConfig($name, $value)
+    {
+        $this->config[$name] = $value;
+    }
+
+    public function getConfig($name, $default = null)
+    {
+        return isset($this->config[$name]) ? $this->config[$name] : $default;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AccessTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AccessTokenInterface.php
new file mode 100644
index 000000000..1819158af
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AccessTokenInterface.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get/save access tokens
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AccessTokenInterface
+{
+    /**
+     * Look up the supplied oauth_token from storage.
+     *
+     * We need to retrieve access token data as we create and verify tokens.
+     *
+     * @param $oauth_token
+     * oauth_token to be check with.
+     *
+     * @return
+     * An associative array as below, and return NULL if the supplied oauth_token
+     * is invalid:
+     * - expires: Stored expiration in unix timestamp.
+     * - client_id: (optional) Stored client identifier.
+     * - user_id: (optional) Stored user identifier.
+     * - scope: (optional) Stored scope values in space-separated string.
+     * - id_token: (optional) Stored id_token (if "use_openid_connect" is true).
+     *
+     * @ingroup oauth2_section_7
+     */
+    public function getAccessToken($oauth_token);
+
+    /**
+     * Store the supplied access token values to storage.
+     *
+     * We need to store access token data as we create and verify tokens.
+     *
+     * @param $oauth_token    oauth_token to be stored.
+     * @param $client_id      client identifier to be stored.
+     * @param $user_id        user identifier to be stored.
+     * @param int    $expires expiration to be stored as a Unix timestamp.
+     * @param string $scope   OPTIONAL Scopes to be stored in space-separated string.
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function setAccessToken($oauth_token, $client_id, $user_id, $expires, $scope = null);
+
+    /**
+     * Expire an access token.
+     *
+     * This is not explicitly required in the spec, but if defined in a draft RFC for token
+     * revoking (RFC 7009) https://tools.ietf.org/html/rfc7009
+     *
+     * @param $access_token
+     * Access token to be expired.
+     *
+     * @return BOOL true if an access token was unset, false if not
+     * @ingroup oauth2_section_6
+     *
+     * @todo v2.0 include this method in interface. Omitted to maintain BC in v1.x
+     */
+    //public function unsetAccessToken($access_token);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AuthorizationCodeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AuthorizationCodeInterface.php
new file mode 100644
index 000000000..edc7c70e5
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/AuthorizationCodeInterface.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get/save authorization codes for the "Authorization Code"
+ * grant type
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface AuthorizationCodeInterface
+{
+    /**
+     * The Authorization Code grant type supports a response type of "code".
+     *
+     * @var string
+     * @see http://tools.ietf.org/html/rfc6749#section-1.4.1
+     * @see http://tools.ietf.org/html/rfc6749#section-4.2
+     */
+    const RESPONSE_TYPE_CODE = "code";
+
+    /**
+     * Fetch authorization code data (probably the most common grant type).
+     *
+     * Retrieve the stored data for the given authorization code.
+     *
+     * Required for OAuth2::GRANT_TYPE_AUTH_CODE.
+     *
+     * @param $code
+     * Authorization code to be check with.
+     *
+     * @return
+     * An associative array as below, and NULL if the code is invalid
+     * @code
+     * return array(
+     *     "client_id"    => CLIENT_ID,      // REQUIRED Stored client identifier
+     *     "user_id"      => USER_ID,        // REQUIRED Stored user identifier
+     *     "expires"      => EXPIRES,        // REQUIRED Stored expiration in unix timestamp
+     *     "redirect_uri" => REDIRECT_URI,   // REQUIRED Stored redirect URI
+     *     "scope"        => SCOPE,          // OPTIONAL Stored scope values in space-separated string
+     * );
+     * @endcode
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function getAuthorizationCode($code);
+
+    /**
+     * Take the provided authorization code values and store them somewhere.
+     *
+     * This function should be the storage counterpart to getAuthCode().
+     *
+     * If storage fails for some reason, we're not currently checking for
+     * any sort of success/failure, so you should bail out of the script
+     * and provide a descriptive fail message.
+     *
+     * Required for OAuth2::GRANT_TYPE_AUTH_CODE.
+     *
+     * @param string $code         Authorization code to be stored.
+     * @param mixed  $client_id    Client identifier to be stored.
+     * @param mixed  $user_id      User identifier to be stored.
+     * @param string $redirect_uri Redirect URI(s) to be stored in a space-separated string.
+     * @param int    $expires      Expiration to be stored as a Unix timestamp.
+     * @param string $scope        OPTIONAL Scopes to be stored in space-separated string.
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null);
+
+    /**
+     * once an Authorization Code is used, it must be expired
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4.1.2
+     *
+     *    The client MUST NOT use the authorization code
+     *    more than once.  If an authorization code is used more than
+     *    once, the authorization server MUST deny the request and SHOULD
+     *    revoke (when possible) all tokens previously issued based on
+     *    that authorization code
+     *
+     */
+    public function expireAuthorizationCode($code);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Cassandra.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Cassandra.php
new file mode 100644
index 000000000..c5048c08d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Cassandra.php
@@ -0,0 +1,480 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use phpcassa\ColumnFamily;
+use phpcassa\ColumnSlice;
+use phpcassa\Connection\ConnectionPool;
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Cassandra storage for all storage types
+ *
+ * To use, install "thobbs/phpcassa" via composer
+ * <code>
+ *  composer require thobbs/phpcassa:dev-master
+ * </code>
+ *
+ * Once this is done, instantiate the
+ * <code>
+ *  $cassandra = new \phpcassa\Connection\ConnectionPool('oauth2_server', array('127.0.0.1:9160'));
+ * </code>
+ *
+ * Then, register the storage client:
+ * <code>
+ *  $storage = new OAuth2\Storage\Cassandra($cassandra);
+ *  $storage->setClientDetails($client_id, $client_secret, $redirect_uri);
+ * </code>
+ *
+ * @see test/lib/OAuth2/Storage/Bootstrap::getCassandraStorage
+ */
+class Cassandra implements AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    ScopeInterface,
+    PublicKeyInterface,
+    UserClaimsInterface,
+    OpenIDAuthorizationCodeInterface
+{
+
+    private $cache;
+
+    /* The cassandra client */
+    protected $cassandra;
+
+    /* Configuration array */
+    protected $config;
+
+    /**
+     * Cassandra Storage! uses phpCassa
+     *
+     * @param \phpcassa\ConnectionPool $cassandra
+     * @param array                    $config
+     */
+    public function __construct($connection = array(), array $config = array())
+    {
+        if ($connection instanceof ConnectionPool) {
+            $this->cassandra = $connection;
+        } else {
+            if (!is_array($connection)) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Cassandra must be an instance of phpcassa\Connection\ConnectionPool or a configuration array');
+            }
+            $connection = array_merge(array(
+                'keyspace' => 'oauth2',
+                'servers'  => null,
+            ), $connection);
+
+            $this->cassandra = new ConnectionPool($connection['keyspace'], $connection['servers']);
+        }
+
+        $this->config = array_merge(array(
+            // cassandra config
+            'column_family' => 'auth',
+
+            // key names
+            'client_key' => 'oauth_clients:',
+            'access_token_key' => 'oauth_access_tokens:',
+            'refresh_token_key' => 'oauth_refresh_tokens:',
+            'code_key' => 'oauth_authorization_codes:',
+            'user_key' => 'oauth_users:',
+            'jwt_key' => 'oauth_jwt:',
+            'scope_key' => 'oauth_scopes:',
+            'public_key_key'  => 'oauth_public_keys:',
+        ), $config);
+    }
+
+    protected function getValue($key)
+    {
+        if (isset($this->cache[$key])) {
+            return $this->cache[$key];
+        }
+        $cf = new ColumnFamily($this->cassandra, $this->config['column_family']);
+
+        try {
+            $value = $cf->get($key, new ColumnSlice("", ""));
+            $value = array_shift($value);
+        } catch (\cassandra\NotFoundException $e) {
+            return false;
+        }
+
+        return json_decode($value, true);
+    }
+
+    protected function setValue($key, $value, $expire = 0)
+    {
+        $this->cache[$key] = $value;
+
+        $cf = new ColumnFamily($this->cassandra, $this->config['column_family']);
+
+        $str = json_encode($value);
+        if ($expire > 0) {
+            try {
+                $seconds = $expire - time();
+                // __data key set as C* requires a field, note: max TTL can only be 630720000 seconds
+                $cf->insert($key, array('__data' => $str), null, $seconds);
+            } catch (\Exception $e) {
+                return false;
+            }
+        } else {
+            try {
+                // __data key set as C* requires a field
+                $cf->insert($key, array('__data' => $str));
+            } catch (\Exception $e) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    protected function expireValue($key)
+    {
+        unset($this->cache[$key]);
+
+        $cf = new ColumnFamily($this->cassandra, $this->config['column_family']);
+
+        if ($cf->get_count($key) > 0) {
+            try {
+                // __data key set as C* requires a field
+                $cf->remove($key, array('__data'));
+            } catch (\Exception $e) {
+                return false;
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        return $this->getValue($this->config['code_key'] . $code);
+    }
+
+    public function setAuthorizationCode($authorization_code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        return $this->setValue(
+            $this->config['code_key'] . $authorization_code,
+            compact('authorization_code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'scope', 'id_token'),
+            $expires
+        );
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $key = $this->config['code_key'] . $code;
+        unset($this->cache[$key]);
+
+        return $this->expireValue($key);
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+
+        return false;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $this->hashPassword($password);
+    }
+
+    // use a secure hashing algorithm when storing passwords. Override this for your application
+    protected function hashPassword($password)
+    {
+        return sha1($password);
+    }
+
+    public function getUserDetails($username)
+    {
+        return $this->getUser($username);
+    }
+
+    public function getUser($username)
+    {
+        if (!$userInfo = $this->getValue($this->config['user_key'] . $username)) {
+            return false;
+        }
+
+        // the default behavior is to use "username" as the user_id
+        return array_merge(array(
+            'user_id' => $username,
+        ), $userInfo);
+    }
+
+    public function setUser($username, $password, $first_name = null, $last_name = null)
+    {
+        $password = $this->hashPassword($password);
+
+        return $this->setValue(
+            $this->config['user_key'] . $username,
+            compact('username', 'password', 'first_name', 'last_name')
+        );
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        if (!$client = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        return isset($client['client_secret'])
+            && $client['client_secret'] == $client_secret;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!$client = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        return empty($client['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        return $this->getValue($this->config['client_key'] . $client_id);
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        return $this->setValue(
+            $this->config['client_key'] . $client_id,
+            compact('client_id', 'client_secret', 'redirect_uri', 'grant_types', 'scope', 'user_id')
+        );
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, (array) $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        return $this->getValue($this->config['refresh_token_key'] . $refresh_token);
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        return $this->setValue(
+            $this->config['refresh_token_key'] . $refresh_token,
+            compact('refresh_token', 'client_id', 'user_id', 'expires', 'scope'),
+            $expires
+        );
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        return $this->expireValue($this->config['refresh_token_key'] . $refresh_token);
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        return $this->getValue($this->config['access_token_key'].$access_token);
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        return $this->setValue(
+            $this->config['access_token_key'].$access_token,
+            compact('access_token', 'client_id', 'user_id', 'expires', 'scope'),
+            $expires
+        );
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        return $this->expireValue($this->config['access_token_key'] . $access_token);
+    }
+
+    /* ScopeInterface */
+    public function scopeExists($scope)
+    {
+        $scope = explode(' ', $scope);
+
+        $result = $this->getValue($this->config['scope_key'].'supported:global');
+
+        $supportedScope = explode(' ', (string) $result);
+
+        return (count(array_diff($scope, $supportedScope)) == 0);
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+        if (is_null($client_id) || !$result = $this->getValue($this->config['scope_key'].'default:'.$client_id)) {
+            $result = $this->getValue($this->config['scope_key'].'default:global');
+        }
+
+        return $result;
+    }
+
+    public function setScope($scope, $client_id = null, $type = 'supported')
+    {
+        if (!in_array($type, array('default', 'supported'))) {
+            throw new \InvalidArgumentException('"$type" must be one of "default", "supported"');
+        }
+
+        if (is_null($client_id)) {
+            $key = $this->config['scope_key'].$type.':global';
+        } else {
+            $key = $this->config['scope_key'].$type.':'.$client_id;
+        }
+
+        return $this->setValue($key, $scope);
+    }
+
+    /*JWTBearerInterface */
+    public function getClientKey($client_id, $subject)
+    {
+        if (!$jwt = $this->getValue($this->config['jwt_key'] . $client_id)) {
+            return false;
+        }
+
+        if (isset($jwt['subject']) && $jwt['subject'] == $subject ) {
+            return $jwt['key'];
+        }
+
+        return null;
+    }
+
+    public function setClientKey($client_id, $key, $subject = null)
+    {
+        return $this->setValue($this->config['jwt_key'] . $client_id, array(
+            'key' => $key,
+            'subject' => $subject
+        ));
+    }
+
+    /*ScopeInterface */
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs cassandra implementation.
+        throw new \Exception('getJti() for the Cassandra driver is currently unimplemented.');
+    }
+
+    public function setJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs cassandra implementation.
+        throw new \Exception('setJti() for the Cassandra driver is currently unimplemented.');
+    }
+
+    /* PublicKeyInterface */
+    public function getPublicKey($client_id = '')
+    {
+        $public_key = $this->getValue($this->config['public_key_key'] . $client_id);
+        if (is_array($public_key)) {
+            return $public_key['public_key'];
+        }
+        $public_key = $this->getValue($this->config['public_key_key']);
+        if (is_array($public_key)) {
+            return $public_key['public_key'];
+        }
+    }
+
+    public function getPrivateKey($client_id = '')
+    {
+        $public_key = $this->getValue($this->config['public_key_key'] . $client_id);
+        if (is_array($public_key)) {
+            return $public_key['private_key'];
+        }
+        $public_key = $this->getValue($this->config['public_key_key']);
+        if (is_array($public_key)) {
+            return $public_key['private_key'];
+        }
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        $public_key = $this->getValue($this->config['public_key_key'] . $client_id);
+        if (is_array($public_key)) {
+            return $public_key['encryption_algorithm'];
+        }
+        $public_key = $this->getValue($this->config['public_key_key']);
+        if (is_array($public_key)) {
+            return $public_key['encryption_algorithm'];
+        }
+
+        return 'RS256';
+    }
+
+    /* UserClaimsInterface */
+    public function getUserClaims($user_id, $claims)
+    {
+        $userDetails = $this->getUserDetails($user_id);
+        if (!is_array($userDetails)) {
+            return false;
+        }
+
+        $claims = explode(' ', trim($claims));
+        $userClaims = array();
+
+        // for each requested claim, if the user has the claim, set it in the response
+        $validClaims = explode(' ', self::VALID_CLAIMS);
+        foreach ($validClaims as $validClaim) {
+            if (in_array($validClaim, $claims)) {
+                if ($validClaim == 'address') {
+                    // address is an object with subfields
+                    $userClaims['address'] = $this->getUserClaim($validClaim, $userDetails['address'] ?: $userDetails);
+                } else {
+                    $userClaims = array_merge($userClaims, $this->getUserClaim($validClaim, $userDetails));
+                }
+            }
+        }
+
+        return $userClaims;
+    }
+
+    protected function getUserClaim($claim, $userDetails)
+    {
+        $userClaims = array();
+        $claimValuesString = constant(sprintf('self::%s_CLAIM_VALUES', strtoupper($claim)));
+        $claimValues = explode(' ', $claimValuesString);
+
+        foreach ($claimValues as $value) {
+            if ($value == 'email_verified') {
+                $userClaims[$value] = $userDetails[$value]=='true' ? true : false;
+            } else {
+                $userClaims[$value] = isset($userDetails[$value]) ? $userDetails[$value] : null;
+            }
+        }
+
+        return $userClaims;
+    }
+
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientCredentialsInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientCredentialsInterface.php
new file mode 100644
index 000000000..3318c6966
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientCredentialsInterface.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify how the OAuth2 Server
+ * should verify client credentials
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface ClientCredentialsInterface extends ClientInterface
+{
+
+    /**
+     * Make sure that the client credentials is valid.
+     *
+     * @param $client_id
+     * Client identifier to be check with.
+     * @param $client_secret
+     * (optional) If a secret is required, check that they've given the right one.
+     *
+     * @return
+     * TRUE if the client credentials are valid, and MUST return FALSE if it isn't.
+     * @endcode
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-3.1
+     *
+     * @ingroup oauth2_section_3
+     */
+    public function checkClientCredentials($client_id, $client_secret = null);
+
+    /**
+     * Determine if the client is a "public" client, and therefore
+     * does not require passing credentials for certain grant types
+     *
+     * @param $client_id
+     * Client identifier to be check with.
+     *
+     * @return
+     * TRUE if the client is public, and FALSE if it isn't.
+     * @endcode
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-2.3
+     * @see https://github.com/bshaffer/oauth2-server-php/issues/257
+     *
+     * @ingroup oauth2_section_2
+     */
+    public function isPublicClient($client_id);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientInterface.php
new file mode 100644
index 000000000..09a5bffc1
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ClientInterface.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should retrieve client information
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface ClientInterface
+{
+    /**
+     * Get client details corresponding client_id.
+     *
+     * OAuth says we should store request URIs for each registered client.
+     * Implement this function to grab the stored URI for a given client id.
+     *
+     * @param $client_id
+     * Client identifier to be check with.
+     *
+     * @return array
+     *               Client details. The only mandatory key in the array is "redirect_uri".
+     *               This function MUST return FALSE if the given client does not exist or is
+     *               invalid. "redirect_uri" can be space-delimited to allow for multiple valid uris.
+     *               <code>
+     *               return array(
+     *               "redirect_uri" => REDIRECT_URI,      // REQUIRED redirect_uri registered for the client
+     *               "client_id"    => CLIENT_ID,         // OPTIONAL the client id
+     *               "grant_types"  => GRANT_TYPES,       // OPTIONAL an array of restricted grant types
+     *               "user_id"      => USER_ID,           // OPTIONAL the user identifier associated with this client
+     *               "scope"        => SCOPE,             // OPTIONAL the scopes allowed for this client
+     *               );
+     *               </code>
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function getClientDetails($client_id);
+
+    /**
+     * Get the scope associated with this client
+     *
+     * @return
+     * STRING the space-delineated scope list for the specified client_id
+     */
+    public function getClientScope($client_id);
+
+    /**
+     * Check restricted grant types of corresponding client identifier.
+     *
+     * If you want to restrict clients to certain grant types, override this
+     * function.
+     *
+     * @param $client_id
+     * Client identifier to be check with.
+     * @param $grant_type
+     * Grant type to be check with
+     *
+     * @return
+     * TRUE if the grant type is supported by this client identifier, and
+     * FALSE if it isn't.
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function checkRestrictedGrantType($client_id, $grant_type);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/CouchbaseDB.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/CouchbaseDB.php
new file mode 100755
index 000000000..1eb55f027
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/CouchbaseDB.php
@@ -0,0 +1,331 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Simple Couchbase storage for all storage types
+ *
+ * This class should be extended or overridden as required
+ *
+ * NOTE: Passwords are stored in plaintext, which is never
+ * a good idea.  Be sure to override this for your application
+ *
+ * @author Tom Park <tom@raucter.com>
+ */
+class CouchbaseDB implements AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    protected $db;
+    protected $config;
+
+    public function __construct($connection, $config = array())
+    {
+        if ($connection instanceof \Couchbase) {
+            $this->db = $connection;
+        } else {
+            if (!is_array($connection) || !is_array($connection['servers'])) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\CouchbaseDB must be an instance of Couchbase or a configuration array containing a server array');
+            }
+
+            $this->db = new \Couchbase($connection['servers'], (!isset($connection['username'])) ? '' : $connection['username'], (!isset($connection['password'])) ? '' : $connection['password'], $connection['bucket'], false);
+        }
+
+        $this->config = array_merge(array(
+            'client_table' => 'oauth_clients',
+            'access_token_table' => 'oauth_access_tokens',
+            'refresh_token_table' => 'oauth_refresh_tokens',
+            'code_table' => 'oauth_authorization_codes',
+            'user_table' => 'oauth_users',
+            'jwt_table' => 'oauth_jwt',
+        ), $config);
+    }
+
+    // Helper function to access couchbase item by type:
+    protected function getObjectByType($name,$id)
+    {
+        return json_decode($this->db->get($this->config[$name].'-'.$id),true);
+    }
+
+    // Helper function to set couchbase item by type:
+    protected function setObjectByType($name,$id,$array)
+    {
+        $array['type'] = $name;
+
+        return $this->db->set($this->config[$name].'-'.$id,json_encode($array));
+    }
+
+    // Helper function to delete couchbase item by type, wait for persist to at least 1 node
+    protected function deleteObjectByType($name,$id)
+    {
+        $this->db->delete($this->config[$name].'-'.$id,"",1);
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        if ($result = $this->getObjectByType('client_table',$client_id)) {
+            return $result['client_secret'] == $client_secret;
+        }
+
+        return false;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!$result = $this->getObjectByType('client_table',$client_id)) {
+            return false;
+        }
+
+        return empty($result['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        $result = $this->getObjectByType('client_table',$client_id);
+
+        return is_null($result) ? false : $result;
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        if ($this->getClientDetails($client_id)) {
+
+            $this->setObjectByType('client_table',$client_id, array(
+                'client_id'     => $client_id,
+                'client_secret' => $client_secret,
+                'redirect_uri'  => $redirect_uri,
+                'grant_types'   => $grant_types,
+                'scope'         => $scope,
+                'user_id'       => $user_id,
+            ));
+        } else {
+            $this->setObjectByType('client_table',$client_id, array(
+                'client_id'     => $client_id,
+                'client_secret' => $client_secret,
+                'redirect_uri'  => $redirect_uri,
+                'grant_types'   => $grant_types,
+                'scope'         => $scope,
+                'user_id'       => $user_id,
+            ));
+        }
+
+        return true;
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        $token = $this->getObjectByType('access_token_table',$access_token);
+
+        return is_null($token) ? false : $token;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // if it exists, update it.
+        if ($this->getAccessToken($access_token)) {
+            $this->setObjectByType('access_token_table',$access_token, array(
+                'access_token' => $access_token,
+                'client_id' => $client_id,
+                'expires' => $expires,
+                'user_id' => $user_id,
+                'scope' => $scope
+            ));
+        } else {
+            $this->setObjectByType('access_token_table',$access_token,  array(
+                'access_token' => $access_token,
+                'client_id' => $client_id,
+                'expires' => $expires,
+                'user_id' => $user_id,
+                'scope' => $scope
+            ));
+        }
+
+        return true;
+    }
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        $code = $this->getObjectByType('code_table',$code);
+
+        return is_null($code) ? false : $code;
+    }
+
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        // if it exists, update it.
+        if ($this->getAuthorizationCode($code)) {
+            $this->setObjectByType('code_table',$code, array(
+                'authorization_code' => $code,
+                'client_id' => $client_id,
+                'user_id' => $user_id,
+                'redirect_uri' => $redirect_uri,
+                'expires' => $expires,
+                'scope' => $scope,
+                'id_token' => $id_token,
+            ));
+        } else {
+            $this->setObjectByType('code_table',$code,array(
+                'authorization_code' => $code,
+                'client_id' => $client_id,
+                'user_id' => $user_id,
+                'redirect_uri' => $redirect_uri,
+                'expires' => $expires,
+                'scope' => $scope,
+                'id_token' => $id_token,
+            ));
+        }
+
+        return true;
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $this->deleteObjectByType('code_table',$code);
+
+        return true;
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+
+        return false;
+    }
+
+    public function getUserDetails($username)
+    {
+        if ($user = $this->getUser($username)) {
+            $user['user_id'] = $user['username'];
+        }
+
+        return $user;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        $token = $this->getObjectByType('refresh_token_table',$refresh_token);
+
+        return is_null($token) ? false : $token;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        $this->setObjectByType('refresh_token_table',$refresh_token, array(
+            'refresh_token' => $refresh_token,
+            'client_id' => $client_id,
+            'user_id' => $user_id,
+            'expires' => $expires,
+            'scope' => $scope
+        ));
+
+        return true;
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $this->deleteObjectByType('refresh_token_table',$refresh_token);
+
+        return true;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $password;
+    }
+
+    public function getUser($username)
+    {
+        $result = $this->getObjectByType('user_table',$username);
+
+        return is_null($result) ? false : $result;
+    }
+
+    public function setUser($username, $password, $firstName = null, $lastName = null)
+    {
+        if ($this->getUser($username)) {
+            $this->setObjectByType('user_table',$username, array(
+                'username' => $username,
+                'password' => $password,
+                'first_name' => $firstName,
+                'last_name' => $lastName
+            ));
+
+        } else {
+            $this->setObjectByType('user_table',$username, array(
+                'username' => $username,
+                'password' => $password,
+                'first_name' => $firstName,
+                'last_name' => $lastName
+            ));
+
+        }
+
+        return true;
+    }
+
+    public function getClientKey($client_id, $subject)
+    {
+        if (!$jwt = $this->getObjectByType('jwt_table',$client_id)) {
+            return false;
+        }
+
+        if (isset($jwt['subject']) && $jwt['subject'] == $subject) {
+            return $jwt['key'];
+        }
+
+        return false;
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs couchbase implementation.
+        throw new \Exception('getJti() for the Couchbase driver is currently unimplemented.');
+    }
+
+    public function setJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs couchbase implementation.
+        throw new \Exception('setJti() for the Couchbase driver is currently unimplemented.');
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/DynamoDB.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/DynamoDB.php
new file mode 100644
index 000000000..8347ab258
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/DynamoDB.php
@@ -0,0 +1,540 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use Aws\DynamoDb\DynamoDbClient;
+
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+/**
+ * DynamoDB storage for all storage types
+ *
+ * To use, install "aws/aws-sdk-php" via composer
+ * <code>
+ *  composer require aws/aws-sdk-php:dev-master
+ * </code>
+ *
+ * Once this is done, instantiate the DynamoDB client
+ * <code>
+ *  $storage = new OAuth2\Storage\Dynamodb(array("key" => "YOURKEY", "secret" => "YOURSECRET", "region" => "YOURREGION"));
+ * </code>
+ *
+ * Table :
+ *  - oauth_access_tokens (primary hash key : access_token)
+ *  - oauth_authorization_codes (primary hash key : authorization_code)
+ *  - oauth_clients (primary hash key : client_id)
+ *  - oauth_jwt (primary hash key : client_id, primary range key : subject)
+ *  - oauth_public_keys (primary hash key : client_id)
+ *  - oauth_refresh_tokens (primary hash key : refresh_token)
+ *  - oauth_scopes (primary hash key : scope, secondary index : is_default-index hash key is_default)
+ *  - oauth_users (primary hash key : username)
+ *
+ * @author Frederic AUGUSTE <frederic.auguste at gmail dot com>
+ */
+class DynamoDB implements
+    AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    ScopeInterface,
+    PublicKeyInterface,
+    UserClaimsInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    protected $client;
+    protected $config;
+
+    public function __construct($connection, $config = array())
+    {
+        if (!($connection instanceof DynamoDbClient)) {
+            if (!is_array($connection)) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Dynamodb must be an instance a configuration array containt key, secret, region');
+            }
+            if (!array_key_exists("key",$connection) || !array_key_exists("secret",$connection) || !array_key_exists("region",$connection) ) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Dynamodb must be an instance a configuration array containt key, secret, region');
+            }
+            $this->client = DynamoDbClient::factory(array(
+                'key' => $connection["key"],
+                'secret' => $connection["secret"],
+                'region' =>$connection["region"]
+            ));
+        } else {
+            $this->client = $connection;
+        }
+
+        $this->config = array_merge(array(
+            'client_table' => 'oauth_clients',
+            'access_token_table' => 'oauth_access_tokens',
+            'refresh_token_table' => 'oauth_refresh_tokens',
+            'code_table' => 'oauth_authorization_codes',
+            'user_table' => 'oauth_users',
+            'jwt_table'  => 'oauth_jwt',
+            'scope_table'  => 'oauth_scopes',
+            'public_key_table'  => 'oauth_public_keys',
+        ), $config);
+    }
+
+    /* OAuth2\Storage\ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['client_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+
+        return  $result->count()==1 && $result["Item"]["client_secret"]["S"] == $client_secret;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['client_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+
+        if ($result->count()==0) {
+            return false ;
+        }
+
+        return empty($result["Item"]["client_secret"]);
+    }
+
+    /* OAuth2\Storage\ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['client_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $result = $this->dynamo2array($result);
+        foreach (array('client_id', 'client_secret', 'redirect_uri', 'grant_types', 'scope', 'user_id') as $key => $val) {
+            if (!array_key_exists ($val, $result)) {
+                $result[$val] = null;
+            }
+        }
+
+        return $result;
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        $clientData = compact('client_id', 'client_secret', 'redirect_uri', 'grant_types', 'scope', 'user_id');
+        $clientData = array_filter($clientData, 'self::isNotEmpty');
+
+        $result = $this->client->putItem(array(
+            'TableName' =>  $this->config['client_table'],
+            'Item' => $this->client->formatAttributes($clientData)
+        ));
+
+        return true;
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, (array) $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* OAuth2\Storage\AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['access_token_table'],
+            "Key" => array('access_token'   => array('S' => $access_token))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+        if (array_key_exists ('expires', $token)) {
+            $token['expires'] = strtotime($token['expires']);
+        }
+
+        return $token;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        $clientData = compact('access_token', 'client_id', 'user_id', 'expires', 'scope');
+        $clientData = array_filter($clientData, 'self::isNotEmpty');
+
+        $result = $this->client->putItem(array(
+            'TableName' =>  $this->config['access_token_table'],
+            'Item' => $this->client->formatAttributes($clientData)
+        ));
+
+        return true;
+
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        $result = $this->client->deleteItem(array(
+            'TableName' =>  $this->config['access_token_table'],
+            'Key' => $this->client->formatAttributes(array("access_token" => $access_token)),
+            'ReturnValues' => 'ALL_OLD',
+        ));
+
+        return null !== $result->get('Attributes');
+    }
+
+    /* OAuth2\Storage\AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['code_table'],
+            "Key" => array('authorization_code'   => array('S' => $code))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+        if (!array_key_exists("id_token", $token )) {
+            $token['id_token'] = null;
+        }
+        $token['expires'] = strtotime($token['expires']);
+
+        return $token;
+
+    }
+
+    public function setAuthorizationCode($authorization_code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        $clientData = compact('authorization_code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'id_token', 'scope');
+        $clientData = array_filter($clientData, 'self::isNotEmpty');
+
+        $result = $this->client->putItem(array(
+            'TableName' =>  $this->config['code_table'],
+            'Item' => $this->client->formatAttributes($clientData)
+        ));
+
+        return true;
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+
+        $result = $this->client->deleteItem(array(
+            'TableName' =>  $this->config['code_table'],
+            'Key' => $this->client->formatAttributes(array("authorization_code" => $code))
+        ));
+
+        return true;
+    }
+
+    /* OAuth2\Storage\UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+
+        return false;
+    }
+
+    public function getUserDetails($username)
+    {
+        return $this->getUser($username);
+    }
+
+    /* UserClaimsInterface */
+    public function getUserClaims($user_id, $claims)
+    {
+        if (!$userDetails = $this->getUserDetails($user_id)) {
+            return false;
+        }
+
+        $claims = explode(' ', trim($claims));
+        $userClaims = array();
+
+        // for each requested claim, if the user has the claim, set it in the response
+        $validClaims = explode(' ', self::VALID_CLAIMS);
+        foreach ($validClaims as $validClaim) {
+            if (in_array($validClaim, $claims)) {
+                if ($validClaim == 'address') {
+                    // address is an object with subfields
+                    $userClaims['address'] = $this->getUserClaim($validClaim, $userDetails['address'] ?: $userDetails);
+                } else {
+                    $userClaims = array_merge($userClaims, $this->getUserClaim($validClaim, $userDetails));
+                }
+            }
+        }
+
+        return $userClaims;
+    }
+
+    protected function getUserClaim($claim, $userDetails)
+    {
+        $userClaims = array();
+        $claimValuesString = constant(sprintf('self::%s_CLAIM_VALUES', strtoupper($claim)));
+        $claimValues = explode(' ', $claimValuesString);
+
+        foreach ($claimValues as $value) {
+            if ($value == 'email_verified') {
+                $userClaims[$value] = $userDetails[$value]=='true' ? true : false;
+            } else {
+                $userClaims[$value] = isset($userDetails[$value]) ? $userDetails[$value] : null;
+            }
+        }
+
+        return $userClaims;
+    }
+
+    /* OAuth2\Storage\RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['refresh_token_table'],
+            "Key" => array('refresh_token'   => array('S' => $refresh_token))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+        $token['expires'] = strtotime($token['expires']);
+
+        return $token;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        $clientData = compact('refresh_token', 'client_id', 'user_id', 'expires', 'scope');
+        $clientData = array_filter($clientData, 'self::isNotEmpty');
+
+        $result = $this->client->putItem(array(
+            'TableName' =>  $this->config['refresh_token_table'],
+            'Item' => $this->client->formatAttributes($clientData)
+        ));
+
+        return true;
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $result = $this->client->deleteItem(array(
+            'TableName' =>  $this->config['refresh_token_table'],
+            'Key' => $this->client->formatAttributes(array("refresh_token" => $refresh_token))
+        ));
+
+        return true;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $this->hashPassword($password);
+    }
+
+    // use a secure hashing algorithm when storing passwords. Override this for your application
+    protected function hashPassword($password)
+    {
+        return sha1($password);
+    }
+
+    public function getUser($username)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['user_table'],
+            "Key" => array('username'   => array('S' => $username))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+        $token['user_id'] = $username;
+
+        return $token;
+    }
+
+    public function setUser($username, $password, $first_name = null, $last_name = null)
+    {
+        // do not store in plaintext
+        $password = $this->hashPassword($password);
+
+        $clientData = compact('username', 'password', 'first_name', 'last_name');
+        $clientData = array_filter($clientData, 'self::isNotEmpty');
+
+        $result = $this->client->putItem(array(
+            'TableName' =>  $this->config['user_table'],
+            'Item' => $this->client->formatAttributes($clientData)
+        ));
+
+        return true;
+
+    }
+
+    /* ScopeInterface */
+    public function scopeExists($scope)
+    {
+        $scope = explode(' ', $scope);
+        $scope_query = array();
+        $count = 0;
+        foreach ($scope as $key => $val) {
+            $result = $this->client->query(array(
+                'TableName'     => $this->config['scope_table'],
+                'Select'        => 'COUNT',
+                'KeyConditions' => array(
+                    'scope' => array(
+                        'AttributeValueList' => array(array('S' => $val)),
+                        'ComparisonOperator' => 'EQ'
+                    )
+                )
+            ));
+            $count += $result['Count'];
+        }
+
+        return $count == count($scope);
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+
+        $result = $this->client->query(array(
+            'TableName' => $this->config['scope_table'],
+            'IndexName' => 'is_default-index',
+            'Select' => 'ALL_ATTRIBUTES',
+            'KeyConditions' => array(
+                'is_default' => array(
+                    'AttributeValueList' => array(array('S' => 'true')),
+                    'ComparisonOperator' => 'EQ',
+                ),
+            )
+        ));
+        $defaultScope = array();
+        if ($result->count() > 0) {
+            $array = $result->toArray();
+            foreach ($array["Items"] as $item) {
+                $defaultScope[]  = $item['scope']['S'];
+            }
+
+            return empty($defaultScope) ? null : implode(' ', $defaultScope);
+        }
+
+        return null;
+    }
+
+    /* JWTBearerInterface */
+    public function getClientKey($client_id, $subject)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['jwt_table'],
+            "Key" => array('client_id'   => array('S' => $client_id), 'subject' => array('S' => $subject))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+
+        return $token['public_key'];
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        //TODO not use.
+    }
+
+    public function setJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        //TODO not use.
+    }
+
+    /* PublicKeyInterface */
+    public function getPublicKey($client_id = '0')
+    {
+
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['public_key_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+
+        return $token['public_key'];
+
+    }
+
+    public function getPrivateKey($client_id = '0')
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['public_key_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+        if ($result->count()==0) {
+            return false ;
+        }
+        $token = $this->dynamo2array($result);
+
+        return $token['private_key'];
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        $result = $this->client->getItem(array(
+            "TableName"=> $this->config['public_key_table'],
+            "Key" => array('client_id'   => array('S' => $client_id))
+        ));
+        if ($result->count()==0) {
+            return 'RS256' ;
+        }
+        $token = $this->dynamo2array($result);
+
+        return $token['encryption_algorithm'];
+    }
+
+    /**
+     * Transform dynamodb resultset to an array.
+     * @param $dynamodbResult
+     * @return $array
+     */
+    private function dynamo2array($dynamodbResult)
+    {
+        $result = array();
+        foreach ($dynamodbResult["Item"] as $key => $val) {
+            $result[$key] = $val["S"];
+            $result[] = $val["S"];
+        }
+
+        return $result;
+    }
+
+    private static function isNotEmpty($value)
+    {
+        return null !== $value && '' !== $value;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessToken.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessToken.php
new file mode 100644
index 000000000..75b49d301
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessToken.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\Encryption\EncryptionInterface;
+use OAuth2\Encryption\Jwt;
+
+/**
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class JwtAccessToken implements JwtAccessTokenInterface
+{
+    protected $publicKeyStorage;
+    protected $tokenStorage;
+    protected $encryptionUtil;
+
+    /**
+     * @param OAuth2\Encryption\PublicKeyInterface  $publicKeyStorage the public key encryption to use
+     * @param OAuth2\Storage\AccessTokenInterface   $tokenStorage     OPTIONAL persist the access token to another storage. This is useful if
+     *                                                                you want to retain access token grant information somewhere, but
+     *                                                                is not necessary when using this grant type.
+     * @param OAuth2\Encryption\EncryptionInterface $encryptionUtil   OPTIONAL class to use for "encode" and "decode" functions.
+     */
+    public function __construct(PublicKeyInterface $publicKeyStorage, AccessTokenInterface $tokenStorage = null, EncryptionInterface $encryptionUtil = null)
+    {
+        $this->publicKeyStorage = $publicKeyStorage;
+        $this->tokenStorage = $tokenStorage;
+        if (is_null($encryptionUtil)) {
+            $encryptionUtil = new Jwt;
+        }
+        $this->encryptionUtil = $encryptionUtil;
+    }
+
+    public function getAccessToken($oauth_token)
+    {
+        // just decode the token, don't verify
+        if (!$tokenData = $this->encryptionUtil->decode($oauth_token, null, false)) {
+            return false;
+        }
+
+        $client_id  = isset($tokenData['aud']) ? $tokenData['aud'] : null;
+        $public_key = $this->publicKeyStorage->getPublicKey($client_id);
+        $algorithm  = $this->publicKeyStorage->getEncryptionAlgorithm($client_id);
+
+        // now that we have the client_id, verify the token
+        if (false === $this->encryptionUtil->decode($oauth_token, $public_key, array($algorithm))) {
+            return false;
+        }
+
+        // normalize the JWT claims to the format expected by other components in this library
+        return $this->convertJwtToOAuth2($tokenData);
+    }
+
+    public function setAccessToken($oauth_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        if ($this->tokenStorage) {
+            return $this->tokenStorage->setAccessToken($oauth_token, $client_id, $user_id, $expires, $scope);
+        }
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        if ($this->tokenStorage) {
+            return $this->tokenStorage->unsetAccessToken($access_token);
+        }
+    }
+
+
+    // converts a JWT access token into an OAuth2-friendly format
+    protected function convertJwtToOAuth2($tokenData)
+    {
+        $keyMapping = array(
+            'aud' => 'client_id',
+            'exp' => 'expires',
+            'sub' => 'user_id'
+        );
+
+        foreach ($keyMapping as $jwtKey => $oauth2Key) {
+            if (isset($tokenData[$jwtKey])) {
+                $tokenData[$oauth2Key] = $tokenData[$jwtKey];
+                unset($tokenData[$jwtKey]);
+            }
+        }
+
+        return $tokenData;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessTokenInterface.php
new file mode 100644
index 000000000..3abb2aa2d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtAccessTokenInterface.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * No specific methods, but allows the library to check "instanceof"
+ * against interface rather than class
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface JwtAccessTokenInterface extends AccessTokenInterface
+{
+
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtBearerInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtBearerInterface.php
new file mode 100644
index 000000000..c83aa72ea
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/JwtBearerInterface.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get the JWT key for clients
+ *
+ * @TODO consider extending ClientInterface, as this will almost always
+ * be the same storage as retrieving clientData
+ *
+ * @author F21
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface JwtBearerInterface
+{
+    /**
+     * Get the public key associated with a client_id
+     *
+     * @param $client_id
+     * Client identifier to be checked with.
+     *
+     * @return
+     * STRING Return the public key for the client_id if it exists, and MUST return FALSE if it doesn't.
+     */
+    public function getClientKey($client_id, $subject);
+
+    /**
+     * Get a jti (JSON token identifier) by matching against the client_id, subject, audience and expiration.
+     *
+     * @param $client_id
+     * Client identifier to match.
+     *
+     * @param $subject
+     * The subject to match.
+     *
+     * @param $audience
+     * The audience to match.
+     *
+     * @param $expiration
+     * The expiration of the jti.
+     *
+     * @param $jti
+     * The jti to match.
+     *
+     * @return
+     * An associative array as below, and return NULL if the jti does not exist.
+     * - issuer: Stored client identifier.
+     * - subject: Stored subject.
+     * - audience: Stored audience.
+     * - expires: Stored expiration in unix timestamp.
+     * - jti: The stored jti.
+     */
+    public function getJti($client_id, $subject, $audience, $expiration, $jti);
+
+    /**
+     * Store a used jti so that we can check against it to prevent replay attacks.
+     * @param $client_id
+     * Client identifier to insert.
+     *
+     * @param $subject
+     * The subject to insert.
+     *
+     * @param $audience
+     * The audience to insert.
+     *
+     * @param $expiration
+     * The expiration of the jti.
+     *
+     * @param $jti
+     * The jti to insert.
+     */
+    public function setJti($client_id, $subject, $audience, $expiration, $jti);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Memory.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Memory.php
new file mode 100644
index 000000000..42d833ccb
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Memory.php
@@ -0,0 +1,381 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Simple in-memory storage for all storage types
+ *
+ * NOTE: This class should never be used in production, and is
+ * a stub class for example use only
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class Memory implements AuthorizationCodeInterface,
+    UserCredentialsInterface,
+    UserClaimsInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    ScopeInterface,
+    PublicKeyInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    public $authorizationCodes;
+    public $userCredentials;
+    public $clientCredentials;
+    public $refreshTokens;
+    public $accessTokens;
+    public $jwt;
+    public $jti;
+    public $supportedScopes;
+    public $defaultScope;
+    public $keys;
+
+    public function __construct($params = array())
+    {
+        $params = array_merge(array(
+            'authorization_codes' => array(),
+            'user_credentials' => array(),
+            'client_credentials' => array(),
+            'refresh_tokens' => array(),
+            'access_tokens' => array(),
+            'jwt' => array(),
+            'jti' => array(),
+            'default_scope' => null,
+            'supported_scopes' => array(),
+            'keys' => array(),
+        ), $params);
+
+        $this->authorizationCodes = $params['authorization_codes'];
+        $this->userCredentials = $params['user_credentials'];
+        $this->clientCredentials = $params['client_credentials'];
+        $this->refreshTokens = $params['refresh_tokens'];
+        $this->accessTokens = $params['access_tokens'];
+        $this->jwt = $params['jwt'];
+        $this->jti = $params['jti'];
+        $this->supportedScopes = $params['supported_scopes'];
+        $this->defaultScope = $params['default_scope'];
+        $this->keys = $params['keys'];
+    }
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        if (!isset($this->authorizationCodes[$code])) {
+            return false;
+        }
+
+        return array_merge(array(
+            'authorization_code' => $code,
+        ), $this->authorizationCodes[$code]);
+    }
+
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        $this->authorizationCodes[$code] = compact('code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'scope', 'id_token');
+
+        return true;
+    }
+
+    public function setAuthorizationCodes($authorization_codes)
+    {
+        $this->authorizationCodes = $authorization_codes;
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        unset($this->authorizationCodes[$code]);
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        $userDetails = $this->getUserDetails($username);
+
+        return $userDetails && $userDetails['password'] && $userDetails['password'] === $password;
+    }
+
+    public function setUser($username, $password, $firstName = null, $lastName = null)
+    {
+        $this->userCredentials[$username] = array(
+            'password'   => $password,
+            'first_name' => $firstName,
+            'last_name'  => $lastName,
+        );
+
+        return true;
+    }
+
+    public function getUserDetails($username)
+    {
+        if (!isset($this->userCredentials[$username])) {
+            return false;
+        }
+
+        return array_merge(array(
+            'user_id'    => $username,
+            'password'   => null,
+            'first_name' => null,
+            'last_name'  => null,
+        ), $this->userCredentials[$username]);
+    }
+
+    /* UserClaimsInterface */
+    public function getUserClaims($user_id, $claims)
+    {
+        if (!$userDetails = $this->getUserDetails($user_id)) {
+            return false;
+        }
+
+        $claims = explode(' ', trim($claims));
+        $userClaims = array();
+
+        // for each requested claim, if the user has the claim, set it in the response
+        $validClaims = explode(' ', self::VALID_CLAIMS);
+        foreach ($validClaims as $validClaim) {
+            if (in_array($validClaim, $claims)) {
+                if ($validClaim == 'address') {
+                    // address is an object with subfields
+                    $userClaims['address'] = $this->getUserClaim($validClaim, $userDetails['address'] ?: $userDetails);
+                } else {
+                    $userClaims = array_merge($userClaims, $this->getUserClaim($validClaim, $userDetails));
+                }
+            }
+        }
+
+        return $userClaims;
+    }
+
+    protected function getUserClaim($claim, $userDetails)
+    {
+        $userClaims = array();
+        $claimValuesString = constant(sprintf('self::%s_CLAIM_VALUES', strtoupper($claim)));
+        $claimValues = explode(' ', $claimValuesString);
+
+        foreach ($claimValues as $value) {
+            $userClaims[$value] = isset($userDetails[$value]) ? $userDetails[$value] : null;
+        }
+
+        return $userClaims;
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        return isset($this->clientCredentials[$client_id]['client_secret']) && $this->clientCredentials[$client_id]['client_secret'] === $client_secret;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!isset($this->clientCredentials[$client_id])) {
+            return false;
+        }
+
+        return empty($this->clientCredentials[$client_id]['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        if (!isset($this->clientCredentials[$client_id])) {
+            return false;
+        }
+
+        $clientDetails = array_merge(array(
+            'client_id'     => $client_id,
+            'client_secret' => null,
+            'redirect_uri'  => null,
+            'scope'         => null,
+        ), $this->clientCredentials[$client_id]);
+
+        return $clientDetails;
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        if (isset($this->clientCredentials[$client_id]['grant_types'])) {
+            $grant_types = explode(' ', $this->clientCredentials[$client_id]['grant_types']);
+
+            return in_array($grant_type, $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        $this->clientCredentials[$client_id] = array(
+            'client_id'     => $client_id,
+            'client_secret' => $client_secret,
+            'redirect_uri'  => $redirect_uri,
+            'grant_types'   => $grant_types,
+            'scope'         => $scope,
+            'user_id'       => $user_id,
+        );
+
+        return true;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        return isset($this->refreshTokens[$refresh_token]) ? $this->refreshTokens[$refresh_token] : false;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        $this->refreshTokens[$refresh_token] = compact('refresh_token', 'client_id', 'user_id', 'expires', 'scope');
+
+        return true;
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        if (isset($this->refreshTokens[$refresh_token])) {
+            unset($this->refreshTokens[$refresh_token]);
+
+            return true;
+        }
+
+        return false;
+    }
+
+    public function setRefreshTokens($refresh_tokens)
+    {
+        $this->refreshTokens = $refresh_tokens;
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        return isset($this->accessTokens[$access_token]) ? $this->accessTokens[$access_token] : false;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null, $id_token = null)
+    {
+        $this->accessTokens[$access_token] = compact('access_token', 'client_id', 'user_id', 'expires', 'scope', 'id_token');
+
+        return true;
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        if (isset($this->accessTokens[$access_token])) {
+            unset($this->accessTokens[$access_token]);
+
+            return true;
+        }
+
+        return false;
+    }
+
+    public function scopeExists($scope)
+    {
+        $scope = explode(' ', trim($scope));
+
+        return (count(array_diff($scope, $this->supportedScopes)) == 0);
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+        return $this->defaultScope;
+    }
+
+    /*JWTBearerInterface */
+    public function getClientKey($client_id, $subject)
+    {
+        if (isset($this->jwt[$client_id])) {
+            $jwt = $this->jwt[$client_id];
+            if ($jwt) {
+                if ($jwt["subject"] == $subject) {
+                    return $jwt["key"];
+                }
+            }
+        }
+
+        return false;
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        foreach ($this->jti as $storedJti) {
+            if ($storedJti['issuer'] == $client_id && $storedJti['subject'] == $subject && $storedJti['audience'] == $audience && $storedJti['expires'] == $expires && $storedJti['jti'] == $jti) {
+                return array(
+                    'issuer' => $storedJti['issuer'],
+                    'subject' => $storedJti['subject'],
+                    'audience' => $storedJti['audience'],
+                    'expires' => $storedJti['expires'],
+                    'jti' => $storedJti['jti']
+                );
+            }
+        }
+
+        return null;
+    }
+
+    public function setJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        $this->jti[] = array('issuer' => $client_id, 'subject' => $subject, 'audience' => $audience, 'expires' => $expires, 'jti' => $jti);
+    }
+
+    /*PublicKeyInterface */
+    public function getPublicKey($client_id = null)
+    {
+        if (isset($this->keys[$client_id])) {
+            return $this->keys[$client_id]['public_key'];
+        }
+
+        // use a global encryption pair
+        if (isset($this->keys['public_key'])) {
+            return $this->keys['public_key'];
+        }
+
+        return false;
+    }
+
+    public function getPrivateKey($client_id = null)
+    {
+        if (isset($this->keys[$client_id])) {
+            return $this->keys[$client_id]['private_key'];
+        }
+
+        // use a global encryption pair
+        if (isset($this->keys['private_key'])) {
+            return $this->keys['private_key'];
+        }
+
+        return false;
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        if (isset($this->keys[$client_id]['encryption_algorithm'])) {
+            return $this->keys[$client_id]['encryption_algorithm'];
+        }
+
+        // use a global encryption algorithm
+        if (isset($this->keys['encryption_algorithm'])) {
+            return $this->keys['encryption_algorithm'];
+        }
+
+        return 'RS256';
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Mongo.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Mongo.php
new file mode 100644
index 000000000..eea06e315
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Mongo.php
@@ -0,0 +1,392 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Simple MongoDB storage for all storage types
+ *
+ * NOTE: This class is meant to get users started
+ * quickly. If your application requires further
+ * customization, extend this class or create your own.
+ *
+ * NOTE: Passwords are stored in plaintext, which is never
+ * a good idea.  Be sure to override this for your application
+ *
+ * @author Julien Chaumond <chaumond@gmail.com>
+ */
+class Mongo implements AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    PublicKeyInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    protected $db;
+    protected $config;
+
+    public function __construct($connection, $config = array())
+    {
+        if ($connection instanceof \MongoDB) {
+            $this->db = $connection;
+        } else {
+            if (!is_array($connection)) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Mongo must be an instance of MongoDB or a configuration array');
+            }
+            $server = sprintf('mongodb://%s:%d', $connection['host'], $connection['port']);
+            $m = new \MongoClient($server);
+            $this->db = $m->{$connection['database']};
+        }
+
+        $this->config = array_merge(array(
+            'client_table' => 'oauth_clients',
+            'access_token_table' => 'oauth_access_tokens',
+            'refresh_token_table' => 'oauth_refresh_tokens',
+            'code_table' => 'oauth_authorization_codes',
+            'user_table' => 'oauth_users',
+            'key_table' => 'oauth_keys',
+            'jwt_table' => 'oauth_jwt',
+        ), $config);
+    }
+
+    // Helper function to access a MongoDB collection by `type`:
+    protected function collection($name)
+    {
+        return $this->db->{$this->config[$name]};
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        if ($result = $this->collection('client_table')->findOne(array('client_id' => $client_id))) {
+            return $result['client_secret'] == $client_secret;
+        }
+
+        return false;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!$result = $this->collection('client_table')->findOne(array('client_id' => $client_id))) {
+            return false;
+        }
+
+        return empty($result['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        $result = $this->collection('client_table')->findOne(array('client_id' => $client_id));
+
+        return is_null($result) ? false : $result;
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        if ($this->getClientDetails($client_id)) {
+            $this->collection('client_table')->update(
+                array('client_id' => $client_id),
+                array('$set' => array(
+                    'client_secret' => $client_secret,
+                    'redirect_uri'  => $redirect_uri,
+                    'grant_types'   => $grant_types,
+                    'scope'         => $scope,
+                    'user_id'       => $user_id,
+                ))
+            );
+        } else {
+            $client = array(
+                'client_id'     => $client_id,
+                'client_secret' => $client_secret,
+                'redirect_uri'  => $redirect_uri,
+                'grant_types'   => $grant_types,
+                'scope'         => $scope,
+                'user_id'       => $user_id,
+            );
+            $this->collection('client_table')->insert($client);
+        }
+
+        return true;
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        $token = $this->collection('access_token_table')->findOne(array('access_token' => $access_token));
+
+        return is_null($token) ? false : $token;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // if it exists, update it.
+        if ($this->getAccessToken($access_token)) {
+            $this->collection('access_token_table')->update(
+                array('access_token' => $access_token),
+                array('$set' => array(
+                    'client_id' => $client_id,
+                    'expires' => $expires,
+                    'user_id' => $user_id,
+                    'scope' => $scope
+                ))
+            );
+        } else {
+            $token = array(
+                'access_token' => $access_token,
+                'client_id' => $client_id,
+                'expires' => $expires,
+                'user_id' => $user_id,
+                'scope' => $scope
+            );
+            $this->collection('access_token_table')->insert($token);
+        }
+
+        return true;
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        $result = $this->collection('access_token_table')->remove(array(
+            'access_token' => $access_token
+        ), array('w' => 1));
+
+        return $result['n'] > 0;
+    }
+
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        $code = $this->collection('code_table')->findOne(array('authorization_code' => $code));
+
+        return is_null($code) ? false : $code;
+    }
+
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        // if it exists, update it.
+        if ($this->getAuthorizationCode($code)) {
+            $this->collection('code_table')->update(
+                array('authorization_code' => $code),
+                array('$set' => array(
+                    'client_id' => $client_id,
+                    'user_id' => $user_id,
+                    'redirect_uri' => $redirect_uri,
+                    'expires' => $expires,
+                    'scope' => $scope,
+                    'id_token' => $id_token,
+                ))
+            );
+        } else {
+            $token = array(
+                'authorization_code' => $code,
+                'client_id' => $client_id,
+                'user_id' => $user_id,
+                'redirect_uri' => $redirect_uri,
+                'expires' => $expires,
+                'scope' => $scope,
+                'id_token' => $id_token,
+            );
+            $this->collection('code_table')->insert($token);
+        }
+
+        return true;
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $this->collection('code_table')->remove(array('authorization_code' => $code));
+
+        return true;
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+
+        return false;
+    }
+
+    public function getUserDetails($username)
+    {
+        if ($user = $this->getUser($username)) {
+            $user['user_id'] = $user['username'];
+        }
+
+        return $user;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        $token = $this->collection('refresh_token_table')->findOne(array('refresh_token' => $refresh_token));
+
+        return is_null($token) ? false : $token;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        $token = array(
+            'refresh_token' => $refresh_token,
+            'client_id' => $client_id,
+            'user_id' => $user_id,
+            'expires' => $expires,
+            'scope' => $scope
+        );
+        $this->collection('refresh_token_table')->insert($token);
+
+        return true;
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $result = $this->collection('refresh_token_table')->remove(array(
+            'refresh_token' => $refresh_token
+        ), array('w' => 1));
+
+        return $result['n'] > 0;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $password;
+    }
+
+    public function getUser($username)
+    {
+        $result = $this->collection('user_table')->findOne(array('username' => $username));
+
+        return is_null($result) ? false : $result;
+    }
+
+    public function setUser($username, $password, $firstName = null, $lastName = null)
+    {
+        if ($this->getUser($username)) {
+            $this->collection('user_table')->update(
+                array('username' => $username),
+                array('$set' => array(
+                    'password' => $password,
+                    'first_name' => $firstName,
+                    'last_name' => $lastName
+                ))
+            );
+        } else {
+            $user = array(
+                'username' => $username,
+                'password' => $password,
+                'first_name' => $firstName,
+                'last_name' => $lastName
+            );
+            $this->collection('user_table')->insert($user);
+        }
+
+        return true;
+    }
+
+    public function getClientKey($client_id, $subject)
+    {
+        $result = $this->collection('jwt_table')->findOne(array(
+            'client_id' => $client_id,
+            'subject' => $subject
+        ));
+
+        return is_null($result) ? false : $result['key'];
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs mongodb implementation.
+        throw new \Exception('getJti() for the MongoDB driver is currently unimplemented.');
+    }
+
+    public function setJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs mongodb implementation.
+        throw new \Exception('setJti() for the MongoDB driver is currently unimplemented.');
+    }
+
+    public function getPublicKey($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['public_key'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? false : $result['public_key'];
+    }
+
+    public function getPrivateKey($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['private_key'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? false : $result['private_key'];
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['encryption_algorithm'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? 'RS256' : $result['encryption_algorithm'];
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/MongoDB.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/MongoDB.php
new file mode 100644
index 000000000..64f740fc1
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/MongoDB.php
@@ -0,0 +1,380 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use MongoDB\Client;
+use MongoDB\Database;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Simple MongoDB storage for all storage types
+ *
+ * NOTE: This class is meant to get users started
+ * quickly. If your application requires further
+ * customization, extend this class or create your own.
+ *
+ * NOTE: Passwords are stored in plaintext, which is never
+ * a good idea.  Be sure to override this for your application
+ *
+ * @author Julien Chaumond <chaumond@gmail.com>
+ */
+class MongoDB implements AuthorizationCodeInterface,
+    UserCredentialsInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    PublicKeyInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    protected $db;
+    protected $config;
+
+    public function __construct($connection, $config = array())
+    {
+        if ($connection instanceof Database) {
+            $this->db = $connection;
+        } else {
+            if (!is_array($connection)) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Mongo must be an instance of MongoDB\Database or a configuration array');
+            }
+            $server = sprintf('mongodb://%s:%d', $connection['host'], $connection['port']);
+            $m = new Client($server);
+            $this->db = $m->selectDatabase($connection['database']);
+        }
+        $this->config = array_merge(array(
+            'client_table' => 'oauth_clients',
+            'access_token_table' => 'oauth_access_tokens',
+            'refresh_token_table' => 'oauth_refresh_tokens',
+            'code_table' => 'oauth_authorization_codes',
+            'user_table' => 'oauth_users',
+            'jwt_table' => 'oauth_jwt',
+            'jti_table' => 'oauth_jti',
+            'scope_table'  => 'oauth_scopes',
+            'key_table'  => 'oauth_keys',
+        ), $config);
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        if ($result = $this->collection('client_table')->findOne(array('client_id' => $client_id))) {
+            return $result['client_secret'] == $client_secret;
+        }
+        return false;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!$result = $this->collection('client_table')->findOne(array('client_id' => $client_id))) {
+            return false;
+        }
+        return empty($result['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        $result = $this->collection('client_table')->findOne(array('client_id' => $client_id));
+        return is_null($result) ? false : $result;
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        if ($this->getClientDetails($client_id)) {
+            $result = $this->collection('client_table')->updateOne(
+                array('client_id' => $client_id),
+                array('$set' => array(
+                    'client_secret' => $client_secret,
+                    'redirect_uri'  => $redirect_uri,
+                    'grant_types'   => $grant_types,
+                    'scope'         => $scope,
+                    'user_id'       => $user_id,
+                ))
+            );
+            return $result->getMatchedCount() > 0;
+        }
+        $client = array(
+            'client_id'     => $client_id,
+            'client_secret' => $client_secret,
+            'redirect_uri'  => $redirect_uri,
+            'grant_types'   => $grant_types,
+            'scope'         => $scope,
+            'user_id'       => $user_id,
+        );
+        $result = $this->collection('client_table')->insertOne($client);
+        return $result->getInsertedCount() > 0;
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+            return in_array($grant_type, $grant_types);
+        }
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        $token = $this->collection('access_token_table')->findOne(array('access_token' => $access_token));
+        return is_null($token) ? false : $token;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // if it exists, update it.
+        if ($this->getAccessToken($access_token)) {
+            $result = $this->collection('access_token_table')->updateOne(
+                array('access_token' => $access_token),
+                array('$set' => array(
+                    'client_id' => $client_id,
+                    'expires' => $expires,
+                    'user_id' => $user_id,
+                    'scope' => $scope
+                ))
+            );
+            return $result->getMatchedCount() > 0;
+        }
+        $token = array(
+            'access_token' => $access_token,
+            'client_id' => $client_id,
+            'expires' => $expires,
+            'user_id' => $user_id,
+            'scope' => $scope
+        );
+        $result = $this->collection('access_token_table')->insertOne($token);
+        return $result->getInsertedCount() > 0;
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        $result = $this->collection('access_token_table')->deleteOne(array(
+            'access_token' => $access_token
+        ));
+        return $result->getDeletedCount() > 0;
+    }
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        $code = $this->collection('code_table')->findOne(array(
+            'authorization_code' => $code
+        ));
+        return is_null($code) ? false : $code;
+    }
+
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        // if it exists, update it.
+        if ($this->getAuthorizationCode($code)) {
+            $result = $this->collection('code_table')->updateOne(
+                array('authorization_code' => $code),
+                array('$set' => array(
+                    'client_id' => $client_id,
+                    'user_id' => $user_id,
+                    'redirect_uri' => $redirect_uri,
+                    'expires' => $expires,
+                    'scope' => $scope,
+                    'id_token' => $id_token,
+                ))
+            );
+            return $result->getMatchedCount() > 0;
+        }
+        $token = array(
+            'authorization_code' => $code,
+            'client_id' => $client_id,
+            'user_id' => $user_id,
+            'redirect_uri' => $redirect_uri,
+            'expires' => $expires,
+            'scope' => $scope,
+            'id_token' => $id_token,
+        );
+        $result = $this->collection('code_table')->insertOne($token);
+        return $result->getInsertedCount() > 0;
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $result = $this->collection('code_table')->deleteOne(array(
+            'authorization_code' => $code
+        ));
+        return $result->getDeletedCount() > 0;
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+        return false;
+    }
+
+    public function getUserDetails($username)
+    {
+        if ($user = $this->getUser($username)) {
+            $user['user_id'] = $user['username'];
+        }
+        return $user;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        $token = $this->collection('refresh_token_table')->findOne(array(
+            'refresh_token' => $refresh_token
+        ));
+        return is_null($token) ? false : $token;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        $token = array(
+            'refresh_token' => $refresh_token,
+            'client_id' => $client_id,
+            'user_id' => $user_id,
+            'expires' => $expires,
+            'scope' => $scope
+        );
+        $result = $this->collection('refresh_token_table')->insertOne($token);
+        return $result->getInsertedCount() > 0;
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $result = $this->collection('refresh_token_table')->deleteOne(array(
+            'refresh_token' => $refresh_token
+        ));
+        return $result->getDeletedCount() > 0;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $password;
+    }
+
+    public function getUser($username)
+    {
+        $result = $this->collection('user_table')->findOne(array('username' => $username));
+        return is_null($result) ? false : $result;
+    }
+
+    public function setUser($username, $password, $firstName = null, $lastName = null)
+    {
+        if ($this->getUser($username)) {
+            $result = $this->collection('user_table')->updateOne(
+                array('username' => $username),
+                array('$set' => array(
+                    'password' => $password,
+                    'first_name' => $firstName,
+                    'last_name' => $lastName
+                ))
+            );
+
+            return $result->getMatchedCount() > 0;
+        }
+
+        $user = array(
+            'username' => $username,
+            'password' => $password,
+            'first_name' => $firstName,
+            'last_name' => $lastName
+        );
+        $result = $this->collection('user_table')->insertOne($user);
+        return $result->getInsertedCount() > 0;
+    }
+
+    public function getClientKey($client_id, $subject)
+    {
+        $result = $this->collection('jwt_table')->findOne(array(
+            'client_id' => $client_id,
+            'subject' => $subject
+        ));
+        return is_null($result) ? false : $result['key'];
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        //TODO: Needs mongodb implementation.
+        throw new \Exception('getJti() for the MongoDB driver is currently unimplemented.');
+    }
+
+    public function setJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        //TODO: Needs mongodb implementation.
+        throw new \Exception('setJti() for the MongoDB driver is currently unimplemented.');
+    }
+
+    public function getPublicKey($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['public_key'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? false : $result['public_key'];
+    }
+
+    public function getPrivateKey($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['private_key'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? false : $result['private_key'];
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        if ($client_id) {
+            $result = $this->collection('key_table')->findOne(array(
+                'client_id' => $client_id
+            ));
+            if ($result) {
+                return $result['encryption_algorithm'];
+            }
+        }
+
+        $result = $this->collection('key_table')->findOne(array(
+            'client_id' => null
+        ));
+        return is_null($result) ? 'RS256' : $result['encryption_algorithm'];
+    }
+
+    // Helper function to access a MongoDB collection by `type`:
+    protected function collection($name)
+    {
+        return $this->db->{$this->config[$name]};
+    }
+}
\ No newline at end of file
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php
new file mode 100644
index 000000000..ae5107e29
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php
@@ -0,0 +1,553 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\OpenID\Storage\UserClaimsInterface;
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * Simple PDO storage for all storage types
+ *
+ * NOTE: This class is meant to get users started
+ * quickly. If your application requires further
+ * customization, extend this class or create your own.
+ *
+ * NOTE: Passwords are stored in plaintext, which is never
+ * a good idea.  Be sure to override this for your application
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+class Pdo implements
+    AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    ScopeInterface,
+    PublicKeyInterface,
+    UserClaimsInterface,
+    OpenIDAuthorizationCodeInterface
+{
+    protected $db;
+    protected $config;
+
+    public function __construct($connection, $config = array())
+    {
+        if (!$connection instanceof \PDO) {
+            if (is_string($connection)) {
+                $connection = array('dsn' => $connection);
+            }
+            if (!is_array($connection)) {
+                throw new \InvalidArgumentException('First argument to OAuth2\Storage\Pdo must be an instance of PDO, a DSN string, or a configuration array');
+            }
+            if (!isset($connection['dsn'])) {
+                throw new \InvalidArgumentException('configuration array must contain "dsn"');
+            }
+            // merge optional parameters
+            $connection = array_merge(array(
+                'username' => null,
+                'password' => null,
+                'options' => array(),
+            ), $connection);
+            $connection = new \PDO($connection['dsn'], $connection['username'], $connection['password'], $connection['options']);
+        }
+        $this->db = $connection;
+
+        // debugging
+        $connection->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+
+        $this->config = array_merge(array(
+            'client_table' => 'oauth_clients',
+            'access_token_table' => 'oauth_access_tokens',
+            'refresh_token_table' => 'oauth_refresh_tokens',
+            'code_table' => 'oauth_authorization_codes',
+            'user_table' => 'oauth_users',
+            'jwt_table'  => 'oauth_jwt',
+            'jti_table'  => 'oauth_jti',
+            'scope_table'  => 'oauth_scopes',
+            'public_key_table'  => 'oauth_public_keys',
+        ), $config);
+    }
+
+    /* OAuth2\Storage\ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * from %s where client_id = :client_id', $this->config['client_table']));
+        $stmt->execute(compact('client_id'));
+        $result = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        // make this extensible
+        return $result && $result['client_secret'] == $client_secret;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * from %s where client_id = :client_id', $this->config['client_table']));
+        $stmt->execute(compact('client_id'));
+
+        if (!$result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return false;
+        }
+
+        return empty($result['client_secret']);
+    }
+
+    /* OAuth2\Storage\ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * from %s where client_id = :client_id', $this->config['client_table']));
+        $stmt->execute(compact('client_id'));
+
+        return $stmt->fetch(\PDO::FETCH_ASSOC);
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        // if it exists, update it.
+        if ($this->getClientDetails($client_id)) {
+            $stmt = $this->db->prepare($sql = sprintf('UPDATE %s SET client_secret=:client_secret, redirect_uri=:redirect_uri, grant_types=:grant_types, scope=:scope, user_id=:user_id where client_id=:client_id', $this->config['client_table']));
+        } else {
+            $stmt = $this->db->prepare(sprintf('INSERT INTO %s (client_id, client_secret, redirect_uri, grant_types, scope, user_id) VALUES (:client_id, :client_secret, :redirect_uri, :grant_types, :scope, :user_id)', $this->config['client_table']));
+        }
+
+        return $stmt->execute(compact('client_id', 'client_secret', 'redirect_uri', 'grant_types', 'scope', 'user_id'));
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, (array) $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* OAuth2\Storage\AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * from %s where access_token = :access_token', $this->config['access_token_table']));
+
+        $token = $stmt->execute(compact('access_token'));
+        if ($token = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            // convert date string back to timestamp
+            $token['expires'] = strtotime($token['expires']);
+        }
+
+        return $token;
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        // if it exists, update it.
+        if ($this->getAccessToken($access_token)) {
+            $stmt = $this->db->prepare(sprintf('UPDATE %s SET client_id=:client_id, expires=:expires, user_id=:user_id, scope=:scope where access_token=:access_token', $this->config['access_token_table']));
+        } else {
+            $stmt = $this->db->prepare(sprintf('INSERT INTO %s (access_token, client_id, expires, user_id, scope) VALUES (:access_token, :client_id, :expires, :user_id, :scope)', $this->config['access_token_table']));
+        }
+
+        return $stmt->execute(compact('access_token', 'client_id', 'user_id', 'expires', 'scope'));
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        $stmt = $this->db->prepare(sprintf('DELETE FROM %s WHERE access_token = :access_token', $this->config['access_token_table']));
+
+        $stmt->execute(compact('access_token'));
+
+        return $stmt->rowCount() > 0;
+    }
+
+    /* OAuth2\Storage\AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * from %s where authorization_code = :code', $this->config['code_table']));
+        $stmt->execute(compact('code'));
+
+        if ($code = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            // convert date string back to timestamp
+            $code['expires'] = strtotime($code['expires']);
+        }
+
+        return $code;
+    }
+
+    public function setAuthorizationCode($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        if (func_num_args() > 6) {
+            // we are calling with an id token
+            return call_user_func_array(array($this, 'setAuthorizationCodeWithIdToken'), func_get_args());
+        }
+
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        // if it exists, update it.
+        if ($this->getAuthorizationCode($code)) {
+            $stmt = $this->db->prepare($sql = sprintf('UPDATE %s SET client_id=:client_id, user_id=:user_id, redirect_uri=:redirect_uri, expires=:expires, scope=:scope where authorization_code=:code', $this->config['code_table']));
+        } else {
+            $stmt = $this->db->prepare(sprintf('INSERT INTO %s (authorization_code, client_id, user_id, redirect_uri, expires, scope) VALUES (:code, :client_id, :user_id, :redirect_uri, :expires, :scope)', $this->config['code_table']));
+        }
+
+        return $stmt->execute(compact('code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'scope'));
+    }
+
+    private function setAuthorizationCodeWithIdToken($code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        // if it exists, update it.
+        if ($this->getAuthorizationCode($code)) {
+            $stmt = $this->db->prepare($sql = sprintf('UPDATE %s SET client_id=:client_id, user_id=:user_id, redirect_uri=:redirect_uri, expires=:expires, scope=:scope, id_token =:id_token where authorization_code=:code', $this->config['code_table']));
+        } else {
+            $stmt = $this->db->prepare(sprintf('INSERT INTO %s (authorization_code, client_id, user_id, redirect_uri, expires, scope, id_token) VALUES (:code, :client_id, :user_id, :redirect_uri, :expires, :scope, :id_token)', $this->config['code_table']));
+        }
+
+        return $stmt->execute(compact('code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'scope', 'id_token'));
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $stmt = $this->db->prepare(sprintf('DELETE FROM %s WHERE authorization_code = :code', $this->config['code_table']));
+
+        return $stmt->execute(compact('code'));
+    }
+
+    /* OAuth2\Storage\UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        if ($user = $this->getUser($username)) {
+            return $this->checkPassword($user, $password);
+        }
+
+        return false;
+    }
+
+    public function getUserDetails($username)
+    {
+        return $this->getUser($username);
+    }
+
+    /* UserClaimsInterface */
+    public function getUserClaims($user_id, $claims)
+    {
+        if (!$userDetails = $this->getUserDetails($user_id)) {
+            return false;
+        }
+
+        $claims = explode(' ', trim($claims));
+        $userClaims = array();
+
+        // for each requested claim, if the user has the claim, set it in the response
+        $validClaims = explode(' ', self::VALID_CLAIMS);
+        foreach ($validClaims as $validClaim) {
+            if (in_array($validClaim, $claims)) {
+                if ($validClaim == 'address') {
+                    // address is an object with subfields
+                    $userClaims['address'] = $this->getUserClaim($validClaim, $userDetails['address'] ?: $userDetails);
+                } else {
+                    $userClaims = array_merge($userClaims, $this->getUserClaim($validClaim, $userDetails));
+                }
+            }
+        }
+
+        return $userClaims;
+    }
+
+    protected function getUserClaim($claim, $userDetails)
+    {
+        $userClaims = array();
+        $claimValuesString = constant(sprintf('self::%s_CLAIM_VALUES', strtoupper($claim)));
+        $claimValues = explode(' ', $claimValuesString);
+
+        foreach ($claimValues as $value) {
+            $userClaims[$value] = isset($userDetails[$value]) ? $userDetails[$value] : null;
+        }
+
+        return $userClaims;
+    }
+
+    /* OAuth2\Storage\RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT * FROM %s WHERE refresh_token = :refresh_token', $this->config['refresh_token_table']));
+
+        $token = $stmt->execute(compact('refresh_token'));
+        if ($token = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            // convert expires to epoch time
+            $token['expires'] = strtotime($token['expires']);
+        }
+
+        return $token;
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        // convert expires to datestring
+        $expires = date('Y-m-d H:i:s', $expires);
+
+        $stmt = $this->db->prepare(sprintf('INSERT INTO %s (refresh_token, client_id, user_id, expires, scope) VALUES (:refresh_token, :client_id, :user_id, :expires, :scope)', $this->config['refresh_token_table']));
+
+        return $stmt->execute(compact('refresh_token', 'client_id', 'user_id', 'expires', 'scope'));
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $stmt = $this->db->prepare(sprintf('DELETE FROM %s WHERE refresh_token = :refresh_token', $this->config['refresh_token_table']));
+
+        $stmt->execute(compact('refresh_token'));
+
+        return $stmt->rowCount() > 0;
+    }
+
+    // plaintext passwords are bad!  Override this for your application
+    protected function checkPassword($user, $password)
+    {
+        return $user['password'] == $this->hashPassword($password);
+    }
+
+    // use a secure hashing algorithm when storing passwords. Override this for your application
+    protected function hashPassword($password)
+    {
+        return sha1($password);
+    }
+
+    public function getUser($username)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT * from %s where username=:username', $this->config['user_table']));
+        $stmt->execute(array('username' => $username));
+
+        if (!$userInfo = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return false;
+        }
+
+        // the default behavior is to use "username" as the user_id
+        return array_merge(array(
+            'user_id' => $username
+        ), $userInfo);
+    }
+
+    public function setUser($username, $password, $firstName = null, $lastName = null)
+    {
+        // do not store in plaintext
+        $password = $this->hashPassword($password);
+
+        // if it exists, update it.
+        if ($this->getUser($username)) {
+            $stmt = $this->db->prepare($sql = sprintf('UPDATE %s SET password=:password, first_name=:firstName, last_name=:lastName where username=:username', $this->config['user_table']));
+        } else {
+            $stmt = $this->db->prepare(sprintf('INSERT INTO %s (username, password, first_name, last_name) VALUES (:username, :password, :firstName, :lastName)', $this->config['user_table']));
+        }
+
+        return $stmt->execute(compact('username', 'password', 'firstName', 'lastName'));
+    }
+
+    /* ScopeInterface */
+    public function scopeExists($scope)
+    {
+        $scope = explode(' ', $scope);
+        $whereIn = implode(',', array_fill(0, count($scope), '?'));
+        $stmt = $this->db->prepare(sprintf('SELECT count(scope) as count FROM %s WHERE scope IN (%s)', $this->config['scope_table'], $whereIn));
+        $stmt->execute($scope);
+
+        if ($result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $result['count'] == count($scope);
+        }
+
+        return false;
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+        $stmt = $this->db->prepare(sprintf('SELECT scope FROM %s WHERE is_default=:is_default', $this->config['scope_table']));
+        $stmt->execute(array('is_default' => true));
+
+        if ($result = $stmt->fetchAll(\PDO::FETCH_ASSOC)) {
+            $defaultScope = array_map(function ($row) {
+                return $row['scope'];
+            }, $result);
+
+            return implode(' ', $defaultScope);
+        }
+
+        return null;
+    }
+
+    /* JWTBearerInterface */
+    public function getClientKey($client_id, $subject)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT public_key from %s where client_id=:client_id AND subject=:subject', $this->config['jwt_table']));
+
+        $stmt->execute(array('client_id' => $client_id, 'subject' => $subject));
+
+        return $stmt->fetchColumn();
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT * FROM %s WHERE issuer=:client_id AND subject=:subject AND audience=:audience AND expires=:expires AND jti=:jti', $this->config['jti_table']));
+
+        $stmt->execute(compact('client_id', 'subject', 'audience', 'expires', 'jti'));
+
+        if ($result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return array(
+                'issuer' => $result['issuer'],
+                'subject' => $result['subject'],
+                'audience' => $result['audience'],
+                'expires' => $result['expires'],
+                'jti' => $result['jti'],
+            );
+        }
+
+        return null;
+    }
+
+    public function setJti($client_id, $subject, $audience, $expires, $jti)
+    {
+        $stmt = $this->db->prepare(sprintf('INSERT INTO %s (issuer, subject, audience, expires, jti) VALUES (:client_id, :subject, :audience, :expires, :jti)', $this->config['jti_table']));
+
+        return $stmt->execute(compact('client_id', 'subject', 'audience', 'expires', 'jti'));
+    }
+
+    /* PublicKeyInterface */
+    public function getPublicKey($client_id = null)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT public_key FROM %s WHERE client_id=:client_id OR client_id IS NULL ORDER BY client_id IS NOT NULL DESC', $this->config['public_key_table']));
+
+        $stmt->execute(compact('client_id'));
+        if ($result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $result['public_key'];
+        }
+    }
+
+    public function getPrivateKey($client_id = null)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT private_key FROM %s WHERE client_id=:client_id OR client_id IS NULL ORDER BY client_id IS NOT NULL DESC', $this->config['public_key_table']));
+
+        $stmt->execute(compact('client_id'));
+        if ($result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $result['private_key'];
+        }
+    }
+
+    public function getEncryptionAlgorithm($client_id = null)
+    {
+        $stmt = $this->db->prepare($sql = sprintf('SELECT encryption_algorithm FROM %s WHERE client_id=:client_id OR client_id IS NULL ORDER BY client_id IS NOT NULL DESC', $this->config['public_key_table']));
+
+        $stmt->execute(compact('client_id'));
+        if ($result = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $result['encryption_algorithm'];
+        }
+
+        return 'RS256';
+    }
+
+    /**
+     * DDL to create OAuth2 database and tables for PDO storage
+     *
+     * @see https://github.com/dsquier/oauth2-server-php-mysql
+     */
+    public function getBuildSql($dbName = 'oauth2_server_php')
+    {
+        $sql = "
+        CREATE TABLE {$this->config['client_table']} (
+          client_id             VARCHAR(80)   NOT NULL,
+          client_secret         VARCHAR(80),
+          redirect_uri          VARCHAR(2000),
+          grant_types           VARCHAR(80),
+          scope                 VARCHAR(4000),
+          user_id               VARCHAR(80),
+          PRIMARY KEY (client_id)
+        );
+
+        CREATE TABLE {$this->config['access_token_table']} (
+          access_token         VARCHAR(40)    NOT NULL,
+          client_id            VARCHAR(80)    NOT NULL,
+          user_id              VARCHAR(80),
+          expires              TIMESTAMP      NOT NULL,
+          scope                VARCHAR(4000),
+          PRIMARY KEY (access_token)
+        );
+
+        CREATE TABLE {$this->config['code_table']} (
+          authorization_code  VARCHAR(40)    NOT NULL,
+          client_id           VARCHAR(80)    NOT NULL,
+          user_id             VARCHAR(80),
+          redirect_uri        VARCHAR(2000),
+          expires             TIMESTAMP      NOT NULL,
+          scope               VARCHAR(4000),
+          id_token            VARCHAR(1000),
+          PRIMARY KEY (authorization_code)
+        );
+
+        CREATE TABLE {$this->config['refresh_token_table']} (
+          refresh_token       VARCHAR(40)    NOT NULL,
+          client_id           VARCHAR(80)    NOT NULL,
+          user_id             VARCHAR(80),
+          expires             TIMESTAMP      NOT NULL,
+          scope               VARCHAR(4000),
+          PRIMARY KEY (refresh_token)
+        );
+
+        CREATE TABLE {$this->config['user_table']} (
+          username            VARCHAR(80),
+          password            VARCHAR(80),
+          first_name          VARCHAR(80),
+          last_name           VARCHAR(80),
+          email               VARCHAR(80),
+          email_verified      BOOLEAN,
+          scope               VARCHAR(4000)
+        );
+
+        CREATE TABLE {$this->config['scope_table']} (
+          scope               VARCHAR(80)  NOT NULL,
+          is_default          BOOLEAN,
+          PRIMARY KEY (scope)
+        );
+
+        CREATE TABLE {$this->config['jwt_table']} (
+          client_id           VARCHAR(80)   NOT NULL,
+          subject             VARCHAR(80),
+          public_key          VARCHAR(2000) NOT NULL
+        );
+
+        CREATE TABLE {$this->config['jti_table']} (
+          issuer              VARCHAR(80)   NOT NULL,
+          subject             VARCHAR(80),
+          audience            VARCHAR(80),
+          expires             TIMESTAMP     NOT NULL,
+          jti                 VARCHAR(2000) NOT NULL
+        );
+
+        CREATE TABLE {$this->config['public_key_table']} (
+          client_id            VARCHAR(80),
+          public_key           VARCHAR(2000),
+          private_key          VARCHAR(2000),
+          encryption_algorithm VARCHAR(100) DEFAULT 'RS256'
+        )
+";
+
+        return $sql;
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/PublicKeyInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/PublicKeyInterface.php
new file mode 100644
index 000000000..108418d3a
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/PublicKeyInterface.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get public/private key information
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface PublicKeyInterface
+{
+    public function getPublicKey($client_id = null);
+    public function getPrivateKey($client_id = null);
+    public function getEncryptionAlgorithm($client_id = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Redis.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Redis.php
new file mode 100644
index 000000000..e6294e22d
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Redis.php
@@ -0,0 +1,321 @@
+<?php
+
+namespace OAuth2\Storage;
+
+use OAuth2\OpenID\Storage\AuthorizationCodeInterface as OpenIDAuthorizationCodeInterface;
+
+/**
+ * redis storage for all storage types
+ *
+ * To use, install "predis/predis" via composer
+ *
+ * Register client:
+ * <code>
+ *  $storage = new OAuth2\Storage\Redis($redis);
+ *  $storage->setClientDetails($client_id, $client_secret, $redirect_uri);
+ * </code>
+ */
+class Redis implements AuthorizationCodeInterface,
+    AccessTokenInterface,
+    ClientCredentialsInterface,
+    UserCredentialsInterface,
+    RefreshTokenInterface,
+    JwtBearerInterface,
+    ScopeInterface,
+    OpenIDAuthorizationCodeInterface
+{
+
+    private $cache;
+
+    /* The redis client */
+    protected $redis;
+
+    /* Configuration array */
+    protected $config;
+
+    /**
+     * Redis Storage!
+     *
+     * @param \Predis\Client $redis
+     * @param array          $config
+     */
+    public function __construct($redis, $config=array())
+    {
+        $this->redis = $redis;
+        $this->config = array_merge(array(
+            'client_key' => 'oauth_clients:',
+            'access_token_key' => 'oauth_access_tokens:',
+            'refresh_token_key' => 'oauth_refresh_tokens:',
+            'code_key' => 'oauth_authorization_codes:',
+            'user_key' => 'oauth_users:',
+            'jwt_key' => 'oauth_jwt:',
+            'scope_key' => 'oauth_scopes:',
+        ), $config);
+    }
+
+    protected function getValue($key)
+    {
+        if ( isset($this->cache[$key]) ) {
+            return $this->cache[$key];
+        }
+        $value = $this->redis->get($key);
+        if ( isset($value) ) {
+            return json_decode($value, true);
+        } else {
+            return false;
+        }
+    }
+
+    protected function setValue($key, $value, $expire=0)
+    {
+        $this->cache[$key] = $value;
+        $str = json_encode($value);
+        if ($expire > 0) {
+            $seconds = $expire - time();
+            $ret = $this->redis->setex($key, $seconds, $str);
+        } else {
+            $ret = $this->redis->set($key, $str);
+        }
+
+        // check that the key was set properly
+        // if this fails, an exception will usually thrown, so this step isn't strictly necessary
+        return is_bool($ret) ? $ret : $ret->getPayload() == 'OK';
+    }
+
+    protected function expireValue($key)
+    {
+        unset($this->cache[$key]);
+
+        return $this->redis->del($key);
+    }
+
+    /* AuthorizationCodeInterface */
+    public function getAuthorizationCode($code)
+    {
+        return $this->getValue($this->config['code_key'] . $code);
+    }
+
+    public function setAuthorizationCode($authorization_code, $client_id, $user_id, $redirect_uri, $expires, $scope = null, $id_token = null)
+    {
+        return $this->setValue(
+            $this->config['code_key'] . $authorization_code,
+            compact('authorization_code', 'client_id', 'user_id', 'redirect_uri', 'expires', 'scope', 'id_token'),
+            $expires
+        );
+    }
+
+    public function expireAuthorizationCode($code)
+    {
+        $key = $this->config['code_key'] . $code;
+        unset($this->cache[$key]);
+
+        return $this->expireValue($key);
+    }
+
+    /* UserCredentialsInterface */
+    public function checkUserCredentials($username, $password)
+    {
+        $user = $this->getUserDetails($username);
+
+        return $user && $user['password'] === $password;
+    }
+
+    public function getUserDetails($username)
+    {
+        return $this->getUser($username);
+    }
+
+    public function getUser($username)
+    {
+        if (!$userInfo = $this->getValue($this->config['user_key'] . $username)) {
+            return false;
+        }
+
+        // the default behavior is to use "username" as the user_id
+        return array_merge(array(
+            'user_id' => $username,
+        ), $userInfo);
+    }
+
+    public function setUser($username, $password, $first_name = null, $last_name = null)
+    {
+        return $this->setValue(
+            $this->config['user_key'] . $username,
+            compact('username', 'password', 'first_name', 'last_name')
+        );
+    }
+
+    /* ClientCredentialsInterface */
+    public function checkClientCredentials($client_id, $client_secret = null)
+    {
+        if (!$client = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        return isset($client['client_secret'])
+            && $client['client_secret'] == $client_secret;
+    }
+
+    public function isPublicClient($client_id)
+    {
+        if (!$client = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        return empty($client['client_secret']);
+    }
+
+    /* ClientInterface */
+    public function getClientDetails($client_id)
+    {
+        return $this->getValue($this->config['client_key'] . $client_id);
+    }
+
+    public function setClientDetails($client_id, $client_secret = null, $redirect_uri = null, $grant_types = null, $scope = null, $user_id = null)
+    {
+        return $this->setValue(
+            $this->config['client_key'] . $client_id,
+            compact('client_id', 'client_secret', 'redirect_uri', 'grant_types', 'scope', 'user_id')
+        );
+    }
+
+    public function checkRestrictedGrantType($client_id, $grant_type)
+    {
+        $details = $this->getClientDetails($client_id);
+        if (isset($details['grant_types'])) {
+            $grant_types = explode(' ', $details['grant_types']);
+
+            return in_array($grant_type, (array) $grant_types);
+        }
+
+        // if grant_types are not defined, then none are restricted
+        return true;
+    }
+
+    /* RefreshTokenInterface */
+    public function getRefreshToken($refresh_token)
+    {
+        return $this->getValue($this->config['refresh_token_key'] . $refresh_token);
+    }
+
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        return $this->setValue(
+            $this->config['refresh_token_key'] . $refresh_token,
+            compact('refresh_token', 'client_id', 'user_id', 'expires', 'scope'),
+            $expires
+        );
+    }
+
+    public function unsetRefreshToken($refresh_token)
+    {
+        $result = $this->expireValue($this->config['refresh_token_key'] . $refresh_token);
+
+        return $result > 0;
+    }
+
+    /* AccessTokenInterface */
+    public function getAccessToken($access_token)
+    {
+        return $this->getValue($this->config['access_token_key'].$access_token);
+    }
+
+    public function setAccessToken($access_token, $client_id, $user_id, $expires, $scope = null)
+    {
+        return $this->setValue(
+            $this->config['access_token_key'].$access_token,
+            compact('access_token', 'client_id', 'user_id', 'expires', 'scope'),
+            $expires
+        );
+    }
+
+    public function unsetAccessToken($access_token)
+    {
+        $result = $this->expireValue($this->config['access_token_key'] . $access_token);
+
+        return $result > 0;
+    }
+
+    /* ScopeInterface */
+    public function scopeExists($scope)
+    {
+        $scope = explode(' ', $scope);
+
+        $result = $this->getValue($this->config['scope_key'].'supported:global');
+
+        $supportedScope = explode(' ', (string) $result);
+
+        return (count(array_diff($scope, $supportedScope)) == 0);
+    }
+
+    public function getDefaultScope($client_id = null)
+    {
+        if (is_null($client_id) || !$result = $this->getValue($this->config['scope_key'].'default:'.$client_id)) {
+            $result = $this->getValue($this->config['scope_key'].'default:global');
+        }
+
+        return $result;
+    }
+
+    public function setScope($scope, $client_id = null, $type = 'supported')
+    {
+        if (!in_array($type, array('default', 'supported'))) {
+            throw new \InvalidArgumentException('"$type" must be one of "default", "supported"');
+        }
+
+        if (is_null($client_id)) {
+            $key = $this->config['scope_key'].$type.':global';
+        } else {
+            $key = $this->config['scope_key'].$type.':'.$client_id;
+        }
+
+        return $this->setValue($key, $scope);
+    }
+
+    /*JWTBearerInterface */
+    public function getClientKey($client_id, $subject)
+    {
+        if (!$jwt = $this->getValue($this->config['jwt_key'] . $client_id)) {
+            return false;
+        }
+
+        if (isset($jwt['subject']) && $jwt['subject'] == $subject) {
+            return $jwt['key'];
+        }
+
+        return null;
+    }
+
+    public function setClientKey($client_id, $key, $subject = null)
+    {
+        return $this->setValue($this->config['jwt_key'] . $client_id, array(
+            'key' => $key,
+            'subject' => $subject
+        ));
+    }
+
+    public function getClientScope($client_id)
+    {
+        if (!$clientDetails = $this->getClientDetails($client_id)) {
+            return false;
+        }
+
+        if (isset($clientDetails['scope'])) {
+            return $clientDetails['scope'];
+        }
+
+        return null;
+    }
+
+    public function getJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs redis implementation.
+        throw new \Exception('getJti() for the Redis driver is currently unimplemented.');
+    }
+
+    public function setJti($client_id, $subject, $audience, $expiration, $jti)
+    {
+        //TODO: Needs redis implementation.
+        throw new \Exception('setJti() for the Redis driver is currently unimplemented.');
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/RefreshTokenInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/RefreshTokenInterface.php
new file mode 100644
index 000000000..e6407e440
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/RefreshTokenInterface.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should get/save refresh tokens for the "Refresh Token"
+ * grant type
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface RefreshTokenInterface
+{
+    /**
+     * Grant refresh access tokens.
+     *
+     * Retrieve the stored data for the given refresh token.
+     *
+     * Required for OAuth2::GRANT_TYPE_REFRESH_TOKEN.
+     *
+     * @param $refresh_token
+     * Refresh token to be check with.
+     *
+     * @return
+     * An associative array as below, and NULL if the refresh_token is
+     * invalid:
+     * - refresh_token: Refresh token identifier.
+     * - client_id: Client identifier.
+     * - user_id: User identifier.
+     * - expires: Expiration unix timestamp, or 0 if the token doesn't expire.
+     * - scope: (optional) Scope values in space-separated string.
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-6
+     *
+     * @ingroup oauth2_section_6
+     */
+    public function getRefreshToken($refresh_token);
+
+    /**
+     * Take the provided refresh token values and store them somewhere.
+     *
+     * This function should be the storage counterpart to getRefreshToken().
+     *
+     * If storage fails for some reason, we're not currently checking for
+     * any sort of success/failure, so you should bail out of the script
+     * and provide a descriptive fail message.
+     *
+     * Required for OAuth2::GRANT_TYPE_REFRESH_TOKEN.
+     *
+     * @param $refresh_token
+     * Refresh token to be stored.
+     * @param $client_id
+     * Client identifier to be stored.
+     * @param $user_id
+     * User identifier to be stored.
+     * @param $expires
+     * Expiration timestamp to be stored. 0 if the token doesn't expire.
+     * @param $scope
+     * (optional) Scopes to be stored in space-separated string.
+     *
+     * @ingroup oauth2_section_6
+     */
+    public function setRefreshToken($refresh_token, $client_id, $user_id, $expires, $scope = null);
+
+    /**
+     * Expire a used refresh token.
+     *
+     * This is not explicitly required in the spec, but is almost implied.
+     * After granting a new refresh token, the old one is no longer useful and
+     * so should be forcibly expired in the data store so it can't be used again.
+     *
+     * If storage fails for some reason, we're not currently checking for
+     * any sort of success/failure, so you should bail out of the script
+     * and provide a descriptive fail message.
+     *
+     * @param $refresh_token
+     * Refresh token to be expired.
+     *
+     * @ingroup oauth2_section_6
+     */
+    public function unsetRefreshToken($refresh_token);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ScopeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ScopeInterface.php
new file mode 100644
index 000000000..a8292269b
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/ScopeInterface.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should retrieve data involving the relevent scopes associated
+ * with this implementation.
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface ScopeInterface
+{
+    /**
+     * Check if the provided scope exists.
+     *
+     * @param $scope
+     * A space-separated string of scopes.
+     *
+     * @return
+     * TRUE if it exists, FALSE otherwise.
+     */
+    public function scopeExists($scope);
+
+    /**
+     * The default scope to use in the event the client
+     * does not request one. By returning "false", a
+     * request_error is returned by the server to force a
+     * scope request by the client. By returning "null",
+     * opt out of requiring scopes
+     *
+     * @param $client_id
+     * An optional client id that can be used to return customized default scopes.
+     *
+     * @return
+     * string representation of default scope, null if
+     * scopes are not defined, or false to force scope
+     * request by the client
+     *
+     * ex:
+     *     'default'
+     * ex:
+     *     null
+     */
+    public function getDefaultScope($client_id = null);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/UserCredentialsInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/UserCredentialsInterface.php
new file mode 100644
index 000000000..6e0fd7bad
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/UserCredentialsInterface.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace OAuth2\Storage;
+
+/**
+ * Implement this interface to specify where the OAuth2 Server
+ * should retrieve user credentials for the
+ * "Resource Owner Password Credentials" grant type
+ *
+ * @author Brent Shaffer <bshafs at gmail dot com>
+ */
+interface UserCredentialsInterface
+{
+    /**
+     * Grant access tokens for basic user credentials.
+     *
+     * Check the supplied username and password for validity.
+     *
+     * You can also use the $client_id param to do any checks required based
+     * on a client, if you need that.
+     *
+     * Required for OAuth2::GRANT_TYPE_USER_CREDENTIALS.
+     *
+     * @param $username
+     * Username to be check with.
+     * @param $password
+     * Password to be check with.
+     *
+     * @return
+     * TRUE if the username and password are valid, and FALSE if it isn't.
+     * Moreover, if the username and password are valid, and you want to
+     *
+     * @see http://tools.ietf.org/html/rfc6749#section-4.3
+     *
+     * @ingroup oauth2_section_4
+     */
+    public function checkUserCredentials($username, $password);
+
+    /**
+     * @return
+     * ARRAY the associated "user_id" and optional "scope" values
+     * This function MUST return FALSE if the requested user does not exist or is
+     * invalid. "scope" is a space-separated list of restricted scopes.
+     * @code
+     * return array(
+     *     "user_id"  => USER_ID,    // REQUIRED user_id to be stored with the authorization code or access token
+     *     "scope"    => SCOPE       // OPTIONAL space-separated list of restricted scopes
+     * );
+     * @endcode
+     */
+    public function getUserDetails($username);
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Bearer.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Bearer.php
new file mode 100644
index 000000000..8ac8596ac
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Bearer.php
@@ -0,0 +1,130 @@
+<?php
+
+namespace OAuth2\TokenType;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+*
+*/
+class Bearer implements TokenTypeInterface
+{
+    private $config;
+
+    public function __construct(array $config = array())
+    {
+        $this->config = array_merge(array(
+            'token_param_name'         => 'access_token',
+            'token_bearer_header_name' => 'Bearer',
+        ), $config);
+    }
+
+    public function getTokenType()
+    {
+        return 'Bearer';
+    }
+
+    /**
+     * Check if the request has supplied token
+     *
+     * @see https://github.com/bshaffer/oauth2-server-php/issues/349#issuecomment-37993588
+     */
+    public function requestHasToken(RequestInterface $request)
+    {
+        $headers = $request->headers('AUTHORIZATION');
+
+        // check the header, then the querystring, then the request body
+        return !empty($headers) || (bool) ($request->request($this->config['token_param_name'])) || (bool) ($request->query($this->config['token_param_name']));
+    }
+
+    /**
+     * This is a convenience function that can be used to get the token, which can then
+     * be passed to getAccessTokenData(). The constraints specified by the draft are
+     * attempted to be adheared to in this method.
+     *
+     * As per the Bearer spec (draft 8, section 2) - there are three ways for a client
+     * to specify the bearer token, in order of preference: Authorization Header,
+     * POST and GET.
+     *
+     * NB: Resource servers MUST accept tokens via the Authorization scheme
+     * (http://tools.ietf.org/html/rfc6750#section-2).
+     *
+     * @todo Should we enforce TLS/SSL in this function?
+     *
+     * @see http://tools.ietf.org/html/rfc6750#section-2.1
+     * @see http://tools.ietf.org/html/rfc6750#section-2.2
+     * @see http://tools.ietf.org/html/rfc6750#section-2.3
+     *
+     * Old Android version bug (at least with version 2.2)
+     * @see http://code.google.com/p/android/issues/detail?id=6684
+     *
+     */
+    public function getAccessTokenParameter(RequestInterface $request, ResponseInterface $response)
+    {
+        $headers = $request->headers('AUTHORIZATION');
+
+        /**
+         * Ensure more than one method is not used for including an
+         * access token
+         *
+         * @see http://tools.ietf.org/html/rfc6750#section-3.1
+         */
+        $methodsUsed = !empty($headers) + (bool) ($request->query($this->config['token_param_name'])) + (bool) ($request->request($this->config['token_param_name']));
+        if ($methodsUsed > 1) {
+            $response->setError(400, 'invalid_request', 'Only one method may be used to authenticate at a time (Auth header, GET or POST)');
+
+            return null;
+        }
+
+        /**
+         * If no authentication is provided, set the status code
+         * to 401 and return no other error information
+         *
+         * @see http://tools.ietf.org/html/rfc6750#section-3.1
+         */
+        if ($methodsUsed == 0) {
+            $response->setStatusCode(401);
+
+            return null;
+        }
+
+        // HEADER: Get the access token from the header
+        if (!empty($headers)) {
+            if (!preg_match('/' . $this->config['token_bearer_header_name'] . '\s(\S+)/i', $headers, $matches)) {
+                $response->setError(400, 'invalid_request', 'Malformed auth header');
+
+                return null;
+            }
+
+            return $matches[1];
+        }
+
+        if ($request->request($this->config['token_param_name'])) {
+            // // POST: Get the token from POST data
+            if (!in_array(strtolower($request->server('REQUEST_METHOD')), array('post', 'put'))) {
+                $response->setError(400, 'invalid_request', 'When putting the token in the body, the method must be POST or PUT', '#section-2.2');
+
+                return null;
+            }
+
+            $contentType = $request->server('CONTENT_TYPE');
+            if (false !== $pos = strpos($contentType, ';')) {
+                $contentType = substr($contentType, 0, $pos);
+            }
+
+            if ($contentType !== null && $contentType != 'application/x-www-form-urlencoded') {
+                // IETF specifies content-type. NB: Not all webservers populate this _SERVER variable
+                // @see http://tools.ietf.org/html/rfc6750#section-2.2
+                $response->setError(400, 'invalid_request', 'The content type for POST requests must be "application/x-www-form-urlencoded"');
+
+                return null;
+            }
+
+            return $request->request($this->config['token_param_name']);
+        }
+
+        // GET method
+        return $request->query($this->config['token_param_name']);
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Mac.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Mac.php
new file mode 100644
index 000000000..fe6a86aa6
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/Mac.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace OAuth2\TokenType;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+/**
+* This is not yet supported!
+*/
+class Mac implements TokenTypeInterface
+{
+    public function getTokenType()
+    {
+        return 'mac';
+    }
+
+    public function getAccessTokenParameter(RequestInterface $request, ResponseInterface $response)
+    {
+        throw new \LogicException("Not supported");
+    }
+}
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/TokenTypeInterface.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/TokenTypeInterface.php
new file mode 100644
index 000000000..ad77d4a25
--- /dev/null
+++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/TokenType/TokenTypeInterface.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace OAuth2\TokenType;
+
+use OAuth2\RequestInterface;
+use OAuth2\ResponseInterface;
+
+interface TokenTypeInterface
+{
+    /**
+     * Token type identification string
+     *
+     * ex: "bearer" or "mac"
+     */
+    public function getTokenType();
+
+    /**
+     * Retrieves the token string from the request object
+     */
+    public function getAccessTokenParameter(RequestInterface $request, ResponseInterface $response);
+}