more verification on FDX-B tag demod - reduce...

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index aa1170fc739f24f5dc1b8f1216436c8aa17643d3..bf10a6ec145e96e54a4ea4e42403138d0eca6b20 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -1491,9 +1491,9 @@ int CmdFDXBdemodBI(const char *Cmd){
 
        setDemodBuf(BitStream, 128, preambleIndex);
 
-       // remove but don't verify parity. (pType = 2)
+       // remove marker bits (1's every 9th digit after preamble) (pType = 2)
        size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
-       if ( size <= 103 ) {
+       if ( size != 104 ) {
                if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
                return 0;
        }
@@ -1546,12 +1546,12 @@ int PSKDemod(const char *Cmd, bool verbose)
                clk=0;
        }
        if (invert != 0 && invert != 1) {
-               if (verbose) PrintAndLog("Invalid argument: %s", Cmd);
+               if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
                return 0;
        }
        uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
        size_t BitLen = getFromGraphBuf(BitStream);
-       if (BitLen==0) return -1;
+       if (BitLen==0) return 0;
        uint8_t carrier=countFC(BitStream, BitLen, 0);
        if (carrier!=2 && carrier!=4 && carrier!=8){
                //invalid carrier