primo commit

libraries/vendor/web-token/jwt-library/KeyManagement/Analyzer/OctAnalyzer.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Jose\Component\KeyManagement\Analyzer;
+
+use Jose\Component\Core\JWK;
+use Jose\Component\Core\Util\Base64UrlSafe;
+use function is_string;
+
+final class OctAnalyzer implements KeyAnalyzer
+{
+    public function analyze(JWK $jwk, MessageBag $bag): void
+    {
+        if ($jwk->get('kty') !== 'oct') {
+            return;
+        }
+        $k = $jwk->get('k');
+        if (! is_string($k)) {
+            $bag->add(Message::high('The key is not valid'));
+
+            return;
+        }
+        $k = Base64UrlSafe::decodeNoPadding($k);
+        $kLength = 8 * mb_strlen($k, '8bit');
+        if ($kLength < 128) {
+            $bag->add(Message::high('The key length is less than 128 bits.'));
+        }
+    }
+}