From 27e8fe5394184505e09318d3691761da59ecdff5 Mon Sep 17 00:00:00 2001
From: laforge <laforge@e0336214-984f-0b4b-a45f-81c69e1f0ede>
Date: Tue, 8 Nov 2005 09:14:06 +0000
Subject: add -EPERM return in case of missing authentication

git-svn-id: https://svn.gnumonks.org/trunk/librfid@1661 e0336214-984f-0b4b-a45f-81c69e1f0ede
---
 src/rfid_proto_mifare_classic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/rfid_proto_mifare_classic.c b/src/rfid_proto_mifare_classic.c
index 10de288..99386a1 100644
--- a/src/rfid_proto_mifare_classic.c
+++ b/src/rfid_proto_mifare_classic.c
@@ -64,6 +64,9 @@ mfcl_read(struct rfid_protocol_handle *ph, unsigned int page,
 	if (ret < 0)
 		return ret;
 
+	if (real_rx_len == 1 && *rx_buf == 0x04)
+		return -EPERM;
+
 	if (real_rx_len < *rx_len)
 		*rx_len = real_rx_len;
 
-- 
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