commit d0322b67902773163df220dc362c73e77726fcf1
from: Martijn van Duren <martijn@openbsd.org>
date: Sat Apr  6 15:12:10 2019 UTC

Fix (optical) off by one in line signature normalizer

commit - 6b9e2bc66e11f44b720a44e91c5d2e53045469d7
commit + d0322b67902773163df220dc362c73e77726fcf1
blob - 2011f3527b85f0d5c1e0057bced8b77bbad5bd77
blob + 10efb31617b948c80ec03385746bb97e85842145
--- main.c
+++ main.c
@@ -646,7 +646,7 @@ dkim_signature_normalize(struct dkim_session *session)
 			}
 			continue;
 		}
-		if (linelen > DKIM_SIGNATURE_LINELEN) {
+		if (linelen > DKIM_SIGNATURE_LINELEN + 1) {
 			if (checkpoint == 0)
 				break;
 			for (skip = checkpoint + 1;