From 435f45291d2701d33f493c73844d3a8de2b2d90f Mon Sep 17 00:00:00 2001
From: Jakub Jelen <jjelen@redhat.com>
Date: Mon, 11 Jan 2021 13:03:40 +0100
Subject: [PATCH] include: Introduce secure SSH_SIGNATURE_FREE()

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 832abe7f4ab6f905b15926393952ef8134c18c81)
---
 include/libssh/pki.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/libssh/pki.h b/include/libssh/pki.h
index 9b104349..2fa7582c 100644
--- a/include/libssh/pki.h
+++ b/include/libssh/pki.h
@@ -125,6 +125,8 @@ enum ssh_digest_e ssh_key_hash_from_name(const char *name);
 /* SSH Signature Functions */
 ssh_signature ssh_signature_new(void);
 void ssh_signature_free(ssh_signature sign);
+#define SSH_SIGNATURE_FREE(x) \
+    do { ssh_signature_free(x); x = NULL; } while(0)
 
 int ssh_pki_export_signature_blob(const ssh_signature sign,
                                   ssh_string *sign_blob);