From e734c30b06d997b90882f75338c15d7599fd0218 Mon Sep 17 00:00:00 2001
From: Florent Morselli <contact@spomky-labs.com>
Date: Tue, 13 Feb 2024 08:26:46 +0100
Subject: [PATCH] Fix STAN

---
 src/Library/Signature/Algorithm/EdDSA.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Library/Signature/Algorithm/EdDSA.php b/src/Library/Signature/Algorithm/EdDSA.php
index 7e63d41e..8cf4bc09 100644
--- a/src/Library/Signature/Algorithm/EdDSA.php
+++ b/src/Library/Signature/Algorithm/EdDSA.php
@@ -87,12 +87,15 @@ public function name(): string
 
     private static function getPublicKey(JWK $key): string
     {
+        $d = $key->get('d');
+        assert(is_string($d), 'Unsupported key type');
+
         switch ($key->get('crv')) {
             case 'Ed25519':
-                return Ed25519::publickey_from_secretkey($key->get('d'));
+                return Ed25519::publickey_from_secretkey($d);
             case 'X25519':
                 if (extension_loaded('sodium')) {
-                    return sodium_crypto_scalarmult_base($key->get('d'));
+                    return sodium_crypto_scalarmult_base($d);
                 }
                 // no break
             default: