From 9d93570d9f461ba612999d56fe70ae5abce494a5 Mon Sep 17 00:00:00 2001
From: Heiko Schaefer <heiko@schaefer.name>
Date: Thu, 22 Jul 2021 16:50:51 +0200
Subject: [PATCH] Add comment pointing to Gnuk source for decryption return
 format.

---
 openpgp-card-sequoia/src/decryptor.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/openpgp-card-sequoia/src/decryptor.rs b/openpgp-card-sequoia/src/decryptor.rs
index cba44fd..5631f04 100644
--- a/openpgp-card-sequoia/src/decryptor.rs
+++ b/openpgp-card-sequoia/src/decryptor.rs
@@ -118,6 +118,7 @@ impl<'a> crypto::Decryptor for CardDecryptor<'a> {
                 // (Gnuk returns a leading '0x04' byte and
                 // an additional 32 trailing bytes)
                 if curve == &Curve::NistP256 && dec.len() == 65 {
+                    // see Gnuk src/call-ec.c:82
                     dec = dec[1..33].to_vec();
                 }