installed plugin WP-WebAuthn version 1.2.8

wp-content/plugins/wp-webauthn/vendor/web-token/jwt-signature-algorithm-eddsa/EdDSA.php

@@ -0,0 +1,107 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2020 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Jose\Component\Signature\Algorithm;
+
+use Base64Url\Base64Url;
+use function extension_loaded;
+use function in_array;
+use InvalidArgumentException;
+use Jose\Component\Core\JWK;
+use RuntimeException;
+
+final class EdDSA implements SignatureAlgorithm
+{
+    /**
+     * EdDSA constructor.
+     *
+     * @throws RuntimeException if the extension "sodium" is not available
+     */
+    public function __construct()
+    {
+        if (!extension_loaded('sodium')) {
+            throw new RuntimeException('The extension "sodium" is not available. Please install it to use this method');
+        }
+    }
+
+    public function allowedKeyTypes(): array
+    {
+        return ['OKP'];
+    }
+
+    /**
+     * @throws InvalidArgumentException if the key is not private
+     * @throws InvalidArgumentException if the curve is not supported
+     */
+    public function sign(JWK $key, string $input): string
+    {
+        $this->checkKey($key);
+        if (!$key->has('d')) {
+            throw new InvalidArgumentException('The EC key is not private');
+        }
+        $x = Base64Url::decode($key->get('x'));
+        $d = Base64Url::decode($key->get('d'));
+        $secret = $d.$x;
+
+        switch ($key->get('crv')) {
+            case 'Ed25519':
+                return sodium_crypto_sign_detached($input, $secret);
+
+            default:
+                throw new InvalidArgumentException('Unsupported curve');
+        }
+    }
+
+    /**
+     * @throws InvalidArgumentException if the curve is not supported
+     */
+    public function verify(JWK $key, string $input, string $signature): bool
+    {
+        $this->checkKey($key);
+
+        $public = Base64Url::decode($key->get('x'));
+
+        switch ($key->get('crv')) {
+            case 'Ed25519':
+                return sodium_crypto_sign_verify_detached($signature, $input, $public);
+
+            default:
+                throw new InvalidArgumentException('Unsupported curve');
+        }
+    }
+
+    public function name(): string
+    {
+        return 'EdDSA';
+    }
+
+    /**
+     * @throws InvalidArgumentException if the key type is not valid
+     * @throws InvalidArgumentException if a mandatory key parameter is missing
+     * @throws InvalidArgumentException if the curve is not suuported
+     */
+    private function checkKey(JWK $key): void
+    {
+        if (!in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
+            throw new InvalidArgumentException('Wrong key type.');
+        }
+        foreach (['x', 'crv'] as $k) {
+            if (!$key->has($k)) {
+                throw new InvalidArgumentException(sprintf('The key parameter "%s" is missing.', $k));
+            }
+        }
+        if ('Ed25519' !== $key->get('crv')) {
+            throw new InvalidArgumentException('Unsupported curve.');
+        }
+    }
+}