From 92d3b85d5c4a62327b4d11a593cef0897f49fb98 Mon Sep 17 00:00:00 2001
From: Martin Varmuza <mvarmuza@gmail.com>
Date: Fri, 17 Jan 2025 16:55:19 +0100
Subject: [PATCH] metadata-utils: move hash lenght sanity check to both methods

---
 packages/suite/src/utils/suite/metadata.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/packages/suite/src/utils/suite/metadata.ts b/packages/suite/src/utils/suite/metadata.ts
index b4d7e88cb1a9..50b7c586c239 100644
--- a/packages/suite/src/utils/suite/metadata.ts
+++ b/packages/suite/src/utils/suite/metadata.ts
@@ -26,11 +26,7 @@ const deriveHmac = (metadataKey: string) => {
     const buf = Buffer.from('0123456789abcdeffedcba9876543210', 'hex');
     hmac.update(buf);
 
-    return hmac.digest();
-};
-
-export const deriveAesKey = (metadataKey: string) => {
-    const hash = deriveHmac(metadataKey);
+    const hash = hmac.digest();
     if (hash.length !== 64 && Buffer.byteLength(hash) !== 64) {
         throw new Error(
             `Strange buffer length when deriving account hmac ${hash.length} ; ${Buffer.byteLength(
@@ -38,6 +34,13 @@ export const deriveAesKey = (metadataKey: string) => {
             )}`,
         );
     }
+
+    return hash;
+};
+
+export const deriveAesKey = (metadataKey: string) => {
+    const hash = deriveHmac(metadataKey);
+
     const secondHalf = hash.subarray(32, 64);
 
     return secondHalf.toString('hex');