From 7cab4d8cadccc24f0a7c8b39fac895cfda6eff1f Mon Sep 17 00:00:00 2001
From: Klas Lindfors <klas@yubico.com>
Date: Tue, 4 Dec 2012 20:11:32 +0100
Subject: [PATCH] only accept sequence 0 as success if no config is valid

---
 ykcore/ykcore.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ykcore/ykcore.c b/ykcore/ykcore.c
index 2ad4a72..e65296b 100644
--- a/ykcore/ykcore.c
+++ b/ykcore/ykcore.c
@@ -209,7 +209,7 @@ static int _yk_write(YK_KEY *yk, uint8_t yk_cmd, unsigned char *buf, size_t len)
 	/* when both configurations from a YubiKey is erased it will return
 	 * pgmSeq 0, if one is still configured after an erase pgmSeq is
 	 * counted up as usual. */
-	if(stat.pgmSeq == 0) {
+	if((stat.touchLevel & (CONFIG1_VALID | CONFIG2_VALID)) == 0 && stat.pgmSeq == 0) {
 		return 1;
 	}
 	return stat.pgmSeq != seq;
-- 
2.39.5