installed plugin WP-WebAuthn version 1.2.8

wp-content/plugins/wp-webauthn/vendor/web-auth/webauthn-lib/src/Util/CoseSignatureFixer.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2021 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Webauthn\Util;
+
+use Cose\Algorithm\Signature\ECDSA;
+use Cose\Algorithm\Signature\Signature;
+
+/**
+ * This class fixes the signature of the ECDSA based algorithms.
+ *
+ * @internal
+ *
+ * @see https://www.w3.org/TR/webauthn/#signature-attestation-types
+ */
+abstract class CoseSignatureFixer
+{
+    public static function fix(string $signature, Signature $algorithm): string
+    {
+        switch ($algorithm::identifier()) {
+            case ECDSA\ES256K::ID:
+            case ECDSA\ES256::ID:
+                if (64 === mb_strlen($signature, '8bit')) {
+                    return $signature;
+                }
+
+                return ECDSA\ECSignature::fromAsn1($signature, 64); //TODO: fix this hardcoded value by adding a dedicated method for the algorithms
+            case ECDSA\ES384::ID:
+                if (96 === mb_strlen($signature, '8bit')) {
+                    return $signature;
+                }
+
+                return ECDSA\ECSignature::fromAsn1($signature, 96);
+            case ECDSA\ES512::ID:
+                if (132 === mb_strlen($signature, '8bit')) {
+                    return $signature;
+                }
+
+                return ECDSA\ECSignature::fromAsn1($signature, 132);
+        }
+
+        return $signature;
+    }
+}