first commit

libraries/vendor/web-token/jwt-signature-algorithm-hmac/HS256.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Jose\Component\Signature\Algorithm;
+
+use InvalidArgumentException;
+use Jose\Component\Core\JWK;
+
+final class HS256 extends HMAC
+{
+    public function name(): string
+    {
+        return 'HS256';
+    }
+
+    protected function getHashAlgorithm(): string
+    {
+        return 'sha256';
+    }
+
+    protected function getKey(JWK $key): string
+    {
+        $k = parent::getKey($key);
+        if (mb_strlen($k, '8bit') < 32) {
+            throw new InvalidArgumentException('Invalid key length.');
+        }
+
+        return $k;
+    }
+}