From 9011bc01e3691472595659e4141e45a6c8fd0af6 Mon Sep 17 00:00:00 2001
From: Romain Tartiere <romain.tartiere@gmail.com>
Date: Sat, 20 Nov 2010 22:39:48 +0000
Subject: [PATCH] Don't return directly if we just have a command code.

Mifare DESFire EV1 with authentication with AES or 3K3DES keys will require to
perform CMACing on each frame, even those with just a command.  So it does not
break anything as of today, but would be a problem later on.
---
 libfreefare/mifare_desfire_authenticate.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/libfreefare/mifare_desfire_authenticate.c b/libfreefare/mifare_desfire_authenticate.c
index b71daad..1a6c82a 100644
--- a/libfreefare/mifare_desfire_authenticate.c
+++ b/libfreefare/mifare_desfire_authenticate.c
@@ -141,10 +141,6 @@ mifare_cryto_preprocess_data (MifareTag tag, void *data, size_t *nbytes, off_t o
     if (!key)
 	return data;
 
-    // Return directly if we just have a command code.
-    if (1 == *nbytes)
-	return data;
-
     switch (communication_settings & MDCM_MASK) {
     case MDCM_PLAIN:
 	break;