1 files changed, 124 insertions, 0 deletions
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);
+    }
+}