new file mode 100644

@@ -0,0 +1,55 @@

+<?php

+

+namespace Firebase\JWT;

+

+use InvalidArgumentException;

+use OpenSSLAsymmetricKey;

+use OpenSSLCertificate;

+use TypeError;

+

+class Key

+{

+    /**

+     * @param string|resource|OpenSSLAsymmetricKey|OpenSSLCertificate $keyMaterial

+     * @param string $algorithm

+     */

+    public function __construct(

+        private $keyMaterial,

+        private string $algorithm

+    ) {

+        if (

+            !\is_string($keyMaterial)

+            && !$keyMaterial instanceof OpenSSLAsymmetricKey

+            && !$keyMaterial instanceof OpenSSLCertificate

+            && !\is_resource($keyMaterial)

+        ) {

+            throw new TypeError('Key material must be a string, resource, or OpenSSLAsymmetricKey');

+        }

+

+        if (empty($keyMaterial)) {

+            throw new InvalidArgumentException('Key material must not be empty');

+        }

+

+        if (empty($algorithm)) {

+            throw new InvalidArgumentException('Algorithm must not be empty');

+        }

+    }

+

+    /**

+     * Return the algorithm valid for this key

+     *

+     * @return string

+     */

+    public function getAlgorithm(): string

+    {

+        return $this->algorithm;

+    }

+

+    /**

+     * @return string|resource|OpenSSLAsymmetricKey|OpenSSLCertificate

+     */

+    public function getKeyMaterial()

+    {

+        return $this->keyMaterial;

+    }

+}