From c72a55993b0c57f5a6e6b0544cefdc5463efca47 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <yobibe@gmail.com>
Date: Fri, 14 Mar 2014 22:31:48 +0100
Subject: [PATCH] Return EACCES when authentication to a MIFARE Classic tag
 fails

---
 libfreefare/mifare_classic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libfreefare/mifare_classic.c b/libfreefare/mifare_classic.c
index 71f8c75..5a60273 100644
--- a/libfreefare/mifare_classic.c
+++ b/libfreefare/mifare_classic.c
@@ -94,6 +94,8 @@
 	    if (disconnect) { \
 		tag->active = false; \
 	    } \
+	    if (_res == NFC_EMFCAUTHFAIL) \
+		return errno = EACCES, -1; \
 	    return errno = EIO, -1; \
 	} \
 	__##res##_n = _res; \