From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Mon, 26 Mar 2018 16:30:47 +0000 (+0100)
Subject: ARC: add guard in verify against lack of the dkim-verify context
X-Git-Tag: exim-4_91_RC3~9
X-Git-Url: https://vcs.fsf.org/?p=exim.git;a=commitdiff_plain;h=311fbe57c4e825004fc4aa9665d102cc43f08d34

ARC: add guard in verify against lack of the dkim-verify context
needed for body-hashing
---

diff --git a/src/src/arc.c b/src/src/arc.c
index eb143b697..06ca93736 100644
--- a/src/src/arc.c
+++ b/src/src/arc.c
@@ -993,6 +993,12 @@ acl_verify_arc(void)
 arc_ctx ctx = { NULL };
 const uschar * res;
 
+if (!dkim_verify_ctx)
+  {
+  DEBUG(D_acl) debug_printf("ARC: no DKIM verify context\n");
+  return NULL;
+  }
+
 /* AS evaluation, per
 https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-10#section-6
 */