1 files changed, 76 insertions, 0 deletions

diff --git a/vendor/web-token/jwt-signature-algorithm-eddsa/EdDSA.php b/vendor/web-token/jwt-signature-algorithm-eddsa/EdDSA.php
new file mode 100644
index 0000000..8475c6a
--- /dev/null
+++ b/vendor/web-token/jwt-signature-algorithm-eddsa/EdDSA.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2018 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 Jose\Component\Core\JWK;
+
+final class EdDSA implements SignatureAlgorithm
+{
+    public function allowedKeyTypes(): array
+    {
+        return ['OKP'];
+    }
+
+    public function sign(JWK $key, string $input): string
+    {
+        $this->checkKey($key);
+        if (!$key->has('d')) {
+            throw new \InvalidArgumentException('The 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');
+        }
+    }
+
+    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');
+        }
+    }
+
+    private function checkKey(JWK $key)
+    {
+        if (!\in_array($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.', $k));
+            }
+        }
+        if (!\in_array($key->get('crv'), ['Ed25519'], true)) {
+            throw new \InvalidArgumentException('Unsupported curve.');
+        }
+    }
+
+    public function name(): string
+    {
+        return 'EdDSA';
+    }
+}