From: marshmellow42 <marshmellowrf@gmail.com>
Date: Tue, 28 Feb 2017 18:32:23 +0000 (-0500)
Subject: fix em410x XL bug
X-Git-Tag: v3.0.0~62^2~4
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/b1ee7eed6589860b9aff964bedcf12520523a067?hp=62a38cc8835cc7b98a30ee3e670e6eb582ddd8cd

fix em410x XL bug

and make it rule out more false positives.
---

diff --git a/common/lfdemod.c b/common/lfdemod.c
index 12511208..fee55c92 100644
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -218,8 +218,8 @@ uint8_t Em410xDecode(uint8_t *BitStream, size_t *size, size_t *startIdx, uint32_
 	uint8_t FmtLen = 10; // sets of 4 bits = end data 
 	*startIdx = 0;
 	errChk = preambleSearch(BitStream, preamble, sizeof(preamble), size, startIdx);
-	if (errChk == 0 || *size < 64) return 0;
-	if (*size == 110) FmtLen = 22; // 22 sets of 4 bits
+	if ( errChk == 0 || (*size != 64 && *size != 128) ) return 0;
+	if (*size == 128) FmtLen = 22; // 22 sets of 4 bits
 
 	//skip last 4bit parity row for simplicity
 	*size = removeParity(BitStream, *startIdx + sizeof(preamble), 5, 0, FmtLen * 5);