From: Eugene Crosser <crosser@average.org>
Date: Fri, 10 Nov 2017 01:27:01 +0000 (+0100)
Subject: check that old data exists when it is necessary
X-Git-Url: http://www.average.org/gitweb/?p=pam_pcsc_cr.git;a=commitdiff_plain;h=bcd4173e47de642dd5fa70e1d6019d542ecaf76c;hp=f362aa1f9cfeedd86f89cf1cdf7558aa6782ceba

check that old data exists when it is necessary
---

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);