From 1a323204e3d4bc1325fe9782139f7ad0fde3b5ab Mon Sep 17 00:00:00 2001
From: Matthew LeVan <matthew@coeli.network>
Date: Mon, 8 Jan 2024 18:18:04 -0500
Subject: [PATCH] jets: add comment explaining length matching

---
 rust/ares/src/jets/lock/aes.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rust/ares/src/jets/lock/aes.rs b/rust/ares/src/jets/lock/aes.rs
index f5ffff0..8e67abb 100644
--- a/rust/ares/src/jets/lock/aes.rs
+++ b/rust/ares/src/jets/lock/aes.rs
@@ -183,6 +183,8 @@ mod util {
 
             let (mut iv, iv_bytes) = IndirectAtom::new_raw_mut_bytearray::<16, NockStack>(stack);
 
+            // We match on length here and elsewhere where a similar pattern is followed
+            // to avoid panicking when a zero length is passed to IndirectAtom::new_raw_mut_bytes.
             match txt_len {
                 0 => {
                     ac_aes_siv_en::<N>(key, &mut [], siv_data, iv_bytes, &mut [0u8; 0]).unwrap();