return;
}
-
+int CmdPrintDemodBuff(const char *Cmd)
+{
+ printDemodBuff();
+ return 1;
+}
int CmdAmp(const char *Cmd)
{
int i, rising, falling;
return 1;
}
+// set demod buffer back to raw after biphase demod
+void setBiphaseDemodBuf(uint8_t *BitStream, size_t size)
+{
+ uint8_t rawStream[512]={0x00};
+ size_t i=0;
+ uint8_t curPhase=0;
+ if (size > 256) {
+ PrintAndLog("ERROR - Biphase Demod Buffer overrun");
+ return;
+ }
+ for (size_t idx=0; idx<size; idx++){
+ if(BitStream[idx]){
+ rawStream[i++] = curPhase;
+ rawStream[i++] = curPhase;
+ curPhase ^= 1;
+ } else {
+ rawStream[i++] = curPhase;
+ rawStream[i++] = curPhase ^ 1;
+ }
+ }
+ setDemodBuf(rawStream,i,0);
+ return;
+}
//by marshmellow
//takes 4 arguments - clock, invert, maxErr as integers and amplify as char
//attempts to demodulate ask only
return 1;
}
+//by marshmellow
+//attempts to demodulate and identify a G_Prox_II verex/chubb card
+//WARNING: if it fails during some points it will destroy the DemodBuffer data
+// but will leave the GraphBuffer intact.
+//if successful it will push askraw data back to demod buffer ready for emulation
+int CmdG_Prox_II_Demod(const char *Cmd)
+{
+ int ans = ASKrawDemod(Cmd, FALSE);
+ if (ans <= 0) {
+ if (g_debugMode) PrintAndLog("Error AskrawDemod: %d",ans);
+ return ans;
+ }
+ size_t size = DemodBufferLen;
+ ans = BiphaseRawDecode(DemodBuffer, &size, 0, 0);
+ if (ans !=0) {
+ if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d",ans);
+ return ans;
+ }
+ //call lfdemod.c demod for gProxII
+ ans = gProxII_Demod(DemodBuffer, &size);
+ if (ans < 0){
+ if (g_debugMode) PrintAndLog("Error gProxII_Demod 1st Try: %d",ans);
+ //try biphase again
+ ans = BiphaseRawDecode(DemodBuffer, &size, 1, 0);
+ if (ans != 0) {
+ if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d",ans);
+ return ans;
+ }
+ ans = gProxII_Demod(DemodBuffer, &size);
+ if (ans < 0) {
+ if (g_debugMode) PrintAndLog("Error gProxII_Demod 1st Try: %d",ans);
+ return ans;
+ }
+ }
+ //got a good demod
+ uint32_t ByteStream[65] = {0x00};
+ uint8_t xorKey=0;
+ uint8_t keyCnt=0;
+ uint8_t bitCnt=0;
+ uint8_t ByteCnt=0;
+ size_t startIdx = ans + 6; //start after preamble
+ for (size_t idx = 0; idx<size-6; idx++){
+ if ((idx+1) % 5 == 0){
+ //spacer bit - should be 0
+ if (DemodBuffer[startIdx+idx] != 0) {
+ if (g_debugMode) PrintAndLog("Error spacer not 0: %d, pos: %d",DemodBuffer[startIdx+idx],startIdx+idx);
+ return -1;
+ }
+ continue;
+ }
+ if (keyCnt<8){ //lsb first
+ xorKey = xorKey | (DemodBuffer[startIdx+idx]<<keyCnt);
+ keyCnt++;
+ if (keyCnt==8 && g_debugMode) PrintAndLog("xorKey Found: %02x", xorKey);
+ continue;
+ }
+ //lsb first
+ ByteStream[ByteCnt] = ByteStream[ByteCnt] | (DemodBuffer[startIdx+idx]<<bitCnt);
+ bitCnt++;
+ if (bitCnt % 8 == 0){
+ if (g_debugMode) PrintAndLog("byte %d: %02x",ByteCnt,ByteStream[ByteCnt]);
+ bitCnt=0;
+ ByteCnt++;
+ }
+ }
+ for (uint8_t i = 0; i < ByteCnt; i++){
+ ByteStream[i] ^= xorKey; //xor
+ if (g_debugMode) PrintAndLog("byte %d after xor: %02x", i, ByteStream[i]);
+ }
+ //now ByteStream contains 64 bytes of decrypted raw tag data
+ //
+ uint8_t fmtLen = ByteStream[0]>>2;
+ uint32_t FC = 0;
+ uint32_t Card = 0;
+ uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
+ uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
+ uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
+
+ if (fmtLen==36){
+ FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
+ Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
+ PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d",fmtLen,FC,Card);
+ } else if(fmtLen==26){
+ FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
+ Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
+ PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d",fmtLen,FC,Card);
+ } else {
+ PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",fmtLen);
+ }
+ PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
+ setBiphaseDemodBuf(DemodBuffer+ans, 96);
+ return 1;
+}
+
//by marshmellow - see ASKrawDemod
int Cmdaskrawdemod(const char *Cmd)
{
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return -1;
uint8_t carrier=countPSK_FC(BitStream, BitLen);
- if (carrier!=2 && carrier!=4 || carrier!=8){
+ if (carrier!=2 && carrier!=4 && carrier!=8){
//invalid carrier
- return -1
+ return -1;
}
int errCnt=0;
errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
//{"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
{"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using length of sample differences to detect the edge of a wave (default = 25)"},
{"askem410xdemod",CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
+ {"askgproxiidemod",CmdG_Prox_II_Demod,1, "Demodulate a G Prox II tag from GraphBuffer"},
//{"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional)"},
//{"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0|1>] -- Attempt to demodulate ASK tags and output bin (args optional)"},
{"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
//{"nrzrawdemod", CmdNRZrawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate nrz tags and output binary (args optional)"},
{"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
//{"pskdetectclock",CmdDetectPSKClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
+ {"printdemodbuffer",CmdPrintDemodBuff,1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
{"pskindalademod",CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
//{"psk1rawdemod", CmdPSK1rawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate psk1 tags and output binary (args optional)"},
//{"psk2rawdemod", CmdPSK2rawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate psk2 tags and output binary (args optional)"},
projects / proxmark3-svn / blobdiff