added OAuth21Interface and OAuth21Provider (WIP #5)

Author: codemasher

src/Core/OAuth21Interface.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ * Interface OAuth21Interface
+ *
+ * @created      04.08.2024
+ * @author       smiley <[email protected]>
+ * @copyright    2024 smiley
+ * @license      MIT
+ */
+declare(strict_types=1);
+
+namespace chillerlan\OAuth\Core;
+
+/**
+ * Specifies the basic methods for an OAuth2.1 provider. (WIP)
+ */
+interface OAuth21Interface extends OAuth2Interface, CSRFToken, PKCE{
+
+}

src/Core/OAuth21Provider.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * Class OAuth21Provider
+ *
+ * @created      04.08.2024
+ * @author       smiley <[email protected]>
+ * @copyright    2024 smiley
+ * @license      MIT
+ */
+declare(strict_types=1);
+
+namespace chillerlan\OAuth\Core;
+
+/**
+ * Implements an abstract OAuth 2.1 provider (WIP)
+ *
+ * @link https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-13
+ */
+class OAuth21Provider extends OAuth2Provider implements OAuth21Interface{
+	use PKCETrait;
+
+}