From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Fri, 30 Dec 2016 17:53:07 +0000 (+0000)
Subject: [CritFix] Deal with absent headers in DKIM
X-Git-Tag: 1.4.2~6^2~1
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=85723f1bde9d1774728e9318b8e5aa525143059d;p=rspamd.git

[CritFix] Deal with absent headers in DKIM

MFH: true
---

diff --git a/src/libserver/dkim.c b/src/libserver/dkim.c
index eab074936..20750eefe 100644
--- a/src/libserver/dkim.c
+++ b/src/libserver/dkim.c
@@ -1727,7 +1727,8 @@ rspamd_dkim_canonize_header (struct rspamd_dkim_common_ctx *ctx,
 				rh_num = ar->len - count - 1;
 			}
 			else {
-				rh_num = ar->len - 1;
+				/* Absence of header is just NULL signature update */
+				return TRUE;
 			}
 
 			rh = g_ptr_array_index (ar, rh_num);