From 7e321c2c2a15858b6d27acd8fa11963761bcc2d0 Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Wed, 11 Sep 2024 13:51:16 +0900
Subject: [PATCH] gpg: Fix getting key by IPGP.

* g10/call-dirmngr.c (gpg_dirmngr_dns_cert): Check if DATA for key.

--

GnuPG-bug-id: 7288
Reported-by: Wilfried Teiken
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
---
 g10/call-dirmngr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/g10/call-dirmngr.c b/g10/call-dirmngr.c
index ed2cf9dc2..12469d60a 100644
--- a/g10/call-dirmngr.c
+++ b/g10/call-dirmngr.c
@@ -1198,7 +1198,8 @@ gpg_dirmngr_dns_cert (ctrl_t ctrl, const char *name, const char *certtype,
   if (err)
     goto leave;
 
-  if (r_key)
+  /* Data line returned by dirmngr may be nothing.  Check if any.  */
+  if (es_ftell (parm.memfp) != 0 && r_key)
     {
       es_rewind (parm.memfp);
       *r_key = parm.memfp;