From 06b82e6a6d84d81ba84140dcd1417fcd27b71554 Mon Sep 17 00:00:00 2001
From: "izsh@fail0verflow.com"
 <izsh@fail0verflow.com@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Sun, 20 Oct 2013 11:46:51 +0000
Subject: [PATCH] cmdhf14b.c: fixing a crash in the crc computation when
 missing data (e.g. with 'hf 14b raw -c -p')

---
 client/cmdhf14b.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/client/cmdhf14b.c b/client/cmdhf14b.c
index 5317994f..6696ac09 100644
--- a/client/cmdhf14b.c
+++ b/client/cmdhf14b.c
@@ -334,6 +334,11 @@ int CmdHF14BCmdRaw (const char *cmd) {
         PrintAndLog("Invalid char on input");
         return 0;
     }
+    if (datalen == 0)
+    {
+      PrintAndLog("Missing data input");
+      return 0;
+    }
     if(crc)
     {
         uint8_t first, second;
-- 
2.39.2