From be6eb589e86b0f8ca9e050765b3375dfab5bf91e Mon Sep 17 00:00:00 2001
From: Ajumal <ajumalpa@google.com>
Date: Wed, 10 May 2023 18:08:43 +0530
Subject: [PATCH] fix: Allow KID index 0

---
 src/JWT.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/JWT.php b/src/JWT.php
index 421c42c2..c83ff099 100644
--- a/src/JWT.php
+++ b/src/JWT.php
@@ -439,7 +439,7 @@ private static function getKey(
             return $keyOrKeyArray;
         }
 
-        if (!isset($kid)) {
+        if (empty($kid) && $kid !== '0') {
             throw new UnexpectedValueException('"kid" empty, unable to lookup correct key');
         }