From f8057394d936231fab12626cf0e43dc0549de8b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ant=C3=B3nio=20Conselheiro?= <anarcanudos@proton.me>
Date: Mon, 29 Apr 2024 08:05:14 -0300
Subject: [PATCH] removing additionalData for AES-GCM when undefined

---
 src/webcrypto.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/webcrypto.ts b/src/webcrypto.ts
index 0264c06..c4a3ccb 100644
--- a/src/webcrypto.ts
+++ b/src/webcrypto.ts
@@ -75,8 +75,11 @@ type BlockMode = (typeof mode)[keyof typeof mode];
 function getCryptParams(algo: BlockMode, nonce: Uint8Array, AAD?: Uint8Array) {
   if (algo === mode.CBC) return { name: mode.CBC, iv: nonce };
   if (algo === mode.CTR) return { name: mode.CTR, counter: nonce, length: 64 };
-  if (algo === mode.GCM)
-    return { name: mode.GCM, iv: nonce, additionalData: AAD || new Uint8Array(0) };
+  if (algo === mode.GCM) {
+    if (AAD) return { name: mode.GCM, iv: nonce, additionalData: AAD };
+    else return { name: mode.GCM, iv: nonce };
+  }
+
   throw new Error('unknown aes block mode');
 }