From bcd4173e47de642dd5fa70e1d6019d542ecaf76c Mon Sep 17 00:00:00 2001
From: Eugene Crosser <crosser@average.org>
Date: Fri, 10 Nov 2017 02:27:01 +0100
Subject: [PATCH 1/1] check that old data exists when it is necessary

---
 authobj.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/authobj.c b/authobj.c
index deba028..b4a1f2b 100644
--- a/authobj.c
+++ b/authobj.c
@@ -241,6 +241,10 @@ struct _auth_obj authobj(const char *userid, const char *password,
 	struct _auth_obj new_ao = {0};
 
 	if (!secret || !secsize || !payload) {
+		if (!ablob || !blobsize) {
+			new_ao.err = "authobj: previous data not supplied";
+			return new_ao;
+		}
 		old_ao = parse_authobj(userid, password, oldnonce,
 					secret, secsize,
 					ablob, blobsize, fetch_key);
-- 
2.39.2