From 5a8972c61ea22209deca1aa920c7801e651af0d8 Mon Sep 17 00:00:00 2001
From: Adam <lil22duckling@gmail.com>
Date: Sat, 15 Nov 2025 11:44:43 +0100
Subject: [PATCH] fix: clarify operator precedence in key validation

Add explicit parentheses to key validation condition to make operator
precedence clear. The logic remains unchanged, but the grouping is now
explicit and easier to understand during code review.
---
 blake2/src/macros.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/blake2/src/macros.rs b/blake2/src/macros.rs
index a5d0af50..6574eb58 100644
--- a/blake2/src/macros.rs
+++ b/blake2/src/macros.rs
@@ -309,7 +309,8 @@ macro_rules! blake2_mac_impl {
                 let kl = key.map_or(0, |k| k.len());
                 let bs = <$hash as BlockSizeUser>::BlockSize::USIZE;
                 let qbs = bs / 4;
-                if key.is_some() && kl == 0 || kl > bs || salt.len() > qbs || persona.len() > qbs {
+                if (key.is_some() && kl == 0) || kl > bs || salt.len() > qbs || persona.len() > qbs
+                {
                     return Err(InvalidLength);
                 }
                 let buffer = if let Some(k) = key {