Merge pull request #2277 from valentinewallace/2023-05-fix-big-oms

[rust-lightning] / lightning / src / ln / onion_utils.rs

diff --git a/lightning/src/ln/onion_utils.rs b/lightning/src/ln/onion_utils.rs
index ebcf83bd90dc2d0db68c5300e50cf2f6b06dd718..b7759d26f5c55eaee02900c3d4ebcc3c655f3af0 100644 (file)
--- a/lightning/src/ln/onion_utils.rs
+++ b/lightning/src/ln/onion_utils.rs
@@ -324,7 +324,8 @@ fn construct_onion_packet_with_init_noise<HD: Writeable, P: Packet>(
                chacha.process_in_place(packet_data);
 
                if i == 0 {
-                       packet_data[ONION_DATA_LEN - filler.len()..ONION_DATA_LEN].copy_from_slice(&filler[..]);
+                       let onion_data_len = packet_data.len();
+                       packet_data[onion_data_len - filler.len()..onion_data_len].copy_from_slice(&filler[..]);
                }
 
                let mut hmac = HmacEngine::<Sha256>::new(&keys.mu);