FIX; the "L" optional parameter for swapping endianess on used authentication key...

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index a8c809cfb3df091186ba4c6b5cbcfed60054eeac..7514e4282b4474ade64ac3ad1501729c9a8bd89d 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -26,7 +26,7 @@
 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 uint8_t g_debugMode;
-int DemodBufferLen;
+size_t DemodBufferLen;
 static int CmdHelp(const char *Cmd);
 
 //set the demod buffer with given array of binary (one bit per byte)
@@ -1484,7 +1484,7 @@ int CmdIndalaDecode(const char *Cmd)
                return 0;
        }
        uint8_t invert=0;
-       ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
+       ans = indala26decode(DemodBuffer, &DemodBufferLen, &invert);
        if (ans < 1) {
                if (g_debugMode==1)
                        PrintAndLog("Error2: %d",ans);
@@ -1547,11 +1547,49 @@ int CmdIndalaDecode(const char *Cmd)
        return 1;
 }
 
+int CmdPSKNexWatch(const char *Cmd)
+{
+       if (!PSKDemod("", false)) return 0;
+       uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+       size_t startIdx = 0, size = DemodBufferLen; 
+       bool invert = false;
+       if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
+               // if didn't find preamble try again inverting
+               if (!PSKDemod("1", false)) return 0; 
+               size = DemodBufferLen;
+               if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
+               invert = true;
+       } 
+       if (size != 128) return 0;
+       setDemodBuf(DemodBuffer, size, startIdx+4);
+       startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
+       //get ID
+       uint32_t ID = 0;
+       for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
+               for (uint8_t idx=0; idx<8; idx++){
+                       ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
+               }       
+       }
+       //parity check (TBD)
+
+       //checksum check (TBD)
+
+       //output
+       PrintAndLog("NexWatch ID: %d", ID);
+       if (invert){
+               PrintAndLog("Had to Invert - probably NexKey");
+               for (uint8_t idx=0; idx<size; idx++)
+                       DemodBuffer[idx] ^= 1;
+       } 
+
+       CmdPrintDemodBuff("x");
+       return 1;
+}
+
 // by marshmellow
 // takes 3 arguments - clock, invert, maxErr as integers
 // attempts to demodulate nrz only
 // prints binary found and saves in demodbuffer for further commands
-
 int NRZrawDemod(const char *Cmd, bool verbose)
 {
        int invert=0;
@@ -1854,7 +1892,8 @@ int getSamples(const char *Cmd, bool silent)
                PrintAndLog("Unpacking...");
                BitstreamOut bout = { got, bits_per_sample * n,  0};
                int j =0;
-               for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
+               //for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
+                       for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
                        uint8_t sample = getByte(bits_per_sample, &bout);
                        GraphBuffer[j] = ((int) sample )- 128;
                }
@@ -2146,6 +2185,7 @@ static command_t CommandTable[] =
        {"plot",            CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},
        {"printdemodbuffer",CmdPrintDemodBuff,  1, "[x] -- print the data in the DemodBuffer - 'x' for hex output"},
        {"pskindalademod",  CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
+       {"psknexwatchdemod",CmdPSKNexWatch,     1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
        {"rawdemod",        CmdRawDemod,        1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},  
        {"samples",         CmdSamples,         0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
        {"save",            CmdSave,            1, "<filename> -- Save trace (from graph window)"},