first commit

libraries/vendor/web-token/jwt-signature-algorithm-experimental/HS256_64.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Jose\Component\Signature\Algorithm;
+
+use Jose\Component\Core\JWK;
+
+final class HS256_64 extends HMAC
+{
+    public function hash(JWK $key, string $input): string
+    {
+        $signature = parent::hash($key, $input);
+
+        return mb_substr($signature, 0, 8, '8bit');
+    }
+
+    public function name(): string
+    {
+        return 'HS256/64';
+    }
+
+    protected function getHashAlgorithm(): string
+    {
+        return 'sha256';
+    }
+}