Add configuration class to hold encryption keys.

Author: Potherca

src/Config/Keys.php

@@ -0,0 +1,45 @@
+<?php declare(strict_types=1);
+
+namespace Pdsinterop\Solid\Auth\Config;
+
+use Defuse\Crypto\Key as CryptoKey;
+use League\OAuth2\Server\CryptKey;
+
+class Keys
+{
+    ////////////////////////////// CLASS PROPERTIES \\\\\\\\\\\\\\\\\\\\\\\\\\\\
+
+    /** @var string|CryptoKey */
+    private $encryptionKey;
+    /** @var CryptKey*/
+    private $privateKey;
+
+    //////////////////////////// GETTERS AND SETTERS \\\\\\\\\\\\\\\\\\\\\\\\\\\
+
+    /** @return CryptoKey|string */
+    final public function getEncryptionKey()
+    {
+        return $this->encryptionKey;
+    }
+
+    /** @return CryptKey */
+    final public function getPrivateKey() : CryptKey
+    {
+        return $this->privateKey;
+    }
+
+    //////////////////////////////// PUBLIC API \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
+
+    /**
+     * Keys constructor.
+     *
+     * @param CryptKey $privateKey
+     * @param string|CryptoKey $encryptionKey
+     */
+    final public function __construct(CryptKey $privateKey, $encryptionKey)
+    {
+        // @FIXME: Add type-check for $encryptionKey (or an extending class with different parameter type?)
+        $this->encryptionKey = $encryptionKey;
+        $this->privateKey = $privateKey;
+    }
+}