uint8_t *dest = (uint8_t *)BigBuf;
size_t size=0; //, found=0;
- uint32_t bitLen=0;
+ int bitLen=0;
int clk=0, invert=0, errCnt=0;
uint64_t lo=0;
// Configure to go in 125Khz listen mode
#include "cmdmain.h"
#include "cmddata.h"
#include "lfdemod.h"
-
+uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
+int DemodBufferLen;
static int CmdHelp(const char *Cmd);
+//set the demod buffer with given array of binary (one bit per byte)
+//by marshmellow
+void setDemodBuf(uint8_t *buff,int size)
+{
+ int i=0;
+ for (; i < size; ++i){
+ DemodBuffer[i]=buff[i];
+ }
+ DemodBufferLen=size;
+ return;
+}
+
+//by marshmellow
+void printDemodBuff()
+{
+ uint32_t i = 0;
+ int bitLen = DemodBufferLen;
+ if (bitLen<16) {
+ PrintAndLog("no bits found in demod buffer");
+ return;
+ }
+ if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
+ for (i = 0; i <= (bitLen-16); i+=16) {
+ PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
+ DemodBuffer[i],
+ DemodBuffer[i+1],
+ DemodBuffer[i+2],
+ DemodBuffer[i+3],
+ DemodBuffer[i+4],
+ DemodBuffer[i+5],
+ DemodBuffer[i+6],
+ DemodBuffer[i+7],
+ DemodBuffer[i+8],
+ DemodBuffer[i+9],
+ DemodBuffer[i+10],
+ DemodBuffer[i+11],
+ DemodBuffer[i+12],
+ DemodBuffer[i+13],
+ DemodBuffer[i+14],
+ DemodBuffer[i+15]);
+ }
+ return;
+}
+
+
int CmdAmp(const char *Cmd)
{
int i, rising, falling;
int CmdEm410xDecode(const char *Cmd)
{
uint64_t id=0;
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- uint32_t i=0;
- i=getFromGraphBuf(BitStream);
- id = Em410xDecode(BitStream,i);
+ // uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ // uint32_t i=0;
+ // i=getFromGraphBuf(BitStream);
+ id = Em410xDecode(DemodBuffer,DemodBufferLen);
printEM410x(id);
if (id>0) return 1;
return 0;
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
- uint32_t BitLen = getFromGraphBuf(BitStream);
+
+ int BitLen = getFromGraphBuf(BitStream);
// PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
int errCnt=0;
errCnt = askmandemod(BitStream, &BitLen,&clk,&invert);
- if (errCnt<0){ //if fatal error (or -1)
+ if (errCnt<0||BitLen<16){ //if fatal error (or -1)
// PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
return 0;
}
- if (BitLen<16) return 0;
PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);
//output
}
PrintAndLog("ASK/Manchester decoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
- printBitStream(BitStream,BitLen);
+ setDemodBuf(BitStream,BitLen);
+ printDemodBuff();
uint64_t lo =0;
lo = Em410xDecode(BitStream,BitLen);
if (lo>0){
//set GraphBuffer for clone or sim command
- setGraphBuf(BitStream,BitLen);
PrintAndLog("EM410x pattern found: ");
printEM410x(lo);
return 1;
int bitnum=0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
int high=0,low=0;
- for (;i<GraphTraceLen;++i){
- if (GraphBuffer[i]>high) high=GraphBuffer[i];
- else if(GraphBuffer[i]<low) low=GraphBuffer[i];
- BitStream[i]=GraphBuffer[i];
+ for (;i<DemodBufferLen;++i){
+ if (DemodBuffer[i]>high) high=DemodBuffer[i];
+ else if(DemodBuffer[i]<low) low=DemodBuffer[i];
+ BitStream[i]=DemodBuffer[i];
}
if (high>1 || low <0 ){
PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
printBitStream(BitStream,bitnum);
if (errCnt==0){
- //put back in graphbuffer
- ClearGraph(0);
- for (i=0; i<bitnum;++i){
- GraphBuffer[i]=BitStream[i];
- }
- GraphTraceLen=bitnum;
- RepaintGraphWindow();
uint64_t id = 0;
- id = Em410xDecode(BitStream,i);
+ id = Em410xDecode(BitStream,bitnum);
+ if (id>0) setDemodBuf(BitStream,bitnum);
printEM410x(id);
}
return 1;
sscanf(Cmd, "%i", &offset);
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
//get graphbuffer & high and low
- for (;i<GraphTraceLen;++i){
- if(GraphBuffer[i]>high)high=GraphBuffer[i];
- else if(GraphBuffer[i]<low)low=GraphBuffer[i];
- BitStream[i]=GraphBuffer[i];
+ for (;i<DemodBufferLen;++i){
+ if(DemodBuffer[i]>high)high=DemodBuffer[i];
+ else if(DemodBuffer[i]<low)low=DemodBuffer[i];
+ BitStream[i]=DemodBuffer[i];
}
if (high>1 || low <0){
PrintAndLog("Error: please raw demod the wave first then decode");
//prints binary found and saves in graphbuffer for further commands
int Cmdaskrawdemod(const char *Cmd)
{
- uint32_t i;
int invert=0;
int clk=0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
int BitLen = getFromGraphBuf(BitStream);
int errCnt=0;
errCnt = askrawdemod(BitStream, &BitLen,&clk,&invert);
- if (errCnt==-1){ //throw away static - allow 1 and -1 (in case of threshold command first)
+ if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
PrintAndLog("no data found");
return 0;
}
- if (BitLen<16) return 0;
PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
//PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
- //move BitStream back to GraphBuffer
-
- ClearGraph(0);
- for (i=0; i < BitLen; ++i){
- GraphBuffer[i]=BitStream[i];
- }
- GraphTraceLen=BitLen;
- RepaintGraphWindow();
+ //move BitStream back to DemodBuffer
+ setDemodBuf(BitStream,BitLen);
//output
if (errCnt>0){
} else if(rfLen==0) rfLen=50;
}
PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow);
- uint32_t i=0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
uint32_t BitLen = getFromGraphBuf(BitStream);
int size = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
if (size>0){
PrintAndLog("FSK decoded bitstream:");
- ClearGraph(0);
- for (i=0;i<size;++i){
- GraphBuffer[i]=BitStream[i];
- }
- GraphTraceLen=size;
- RepaintGraphWindow();
+ setDemodBuf(BitStream,size);
// Now output the bitstream to the scrollback by line of 16 bits
if(size > (8*32)+2) size = (8*32)+2; //only output a max of 8 blocks of 32 bits most tags will have full bit stream inside that sample size
}
if (hi2==0 && hi==0 && lo==0) return 0;
if (hi2 != 0){ //extra large HID tags
- PrintAndLog("TAG ID: %x%08x%08x (%d)",
+ PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
- setGraphBuf(BitStream,BitLen);
+ setDemodBuf(BitStream,BitLen);
return 1;
}
else { //standard HID tags <38 bits
fc = ((hi&0xF)<<12)|(lo>>20);
}
}
- PrintAndLog("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
+ PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
(unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
- setGraphBuf(BitStream,BitLen);
+ setDemodBuf(BitStream,BitLen);
return 1;
}
return 0;
uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
-
- PrintAndLog("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
- setGraphBuf(BitStream,BitLen);
+ PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
+ int i;
+ for (i=0;i<64;++i)
+ DemodBuffer[i]=BitStream[idx++];
+
+ DemodBufferLen=64;
return 1;
}
int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
return 0;
}
+int CmdDetectNRZpskClockRate(const char *Cmd)
+{
+ GetNRZpskClock("",0,0);
+ return 0;
+}
+
+int PSKnrzDemod(const char *Cmd){
+ int invert=0;
+ int clk=0;
+ sscanf(Cmd, "%i %i", &clk, &invert);
+ if (invert != 0 && invert != 1) {
+ PrintAndLog("Invalid argument: %s", Cmd);
+ return -1;
+ }
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ int BitLen = getFromGraphBuf(BitStream);
+ int errCnt=0;
+ errCnt = pskNRZrawDemod(BitStream, &BitLen,&clk,&invert);
+ if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
+ //PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ return -1;
+ }
+ PrintAndLog("Tried PSK/NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
+
+ //prime demod buffer for output
+ setDemodBuf(BitStream,BitLen);
+ return errCnt;
+}
+// Indala 26 bit decode
+// by marshmellow
+// optional arguments - same as CmdpskNRZrawDemod (clock & invert)
+int CmdIndalaDecode(const char *Cmd)
+{
+
+ int ans=PSKnrzDemod(Cmd);
+ if (ans < 0){
+ PrintAndLog("Error1: %d",ans);
+ return 0;
+ }
+ uint8_t invert=0;
+ ans = indala26decode(DemodBuffer, &DemodBufferLen, &invert);
+ if (ans < 1) {
+ PrintAndLog("Error2: %d",ans);
+ return -1;
+ }
+ char showbits[251];
+ if(invert==1) PrintAndLog("Had to invert bits");
+ //convert UID to HEX
+ uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
+ int idx;
+ uid1=0;
+ uid2=0;
+ PrintAndLog("BitLen: %d",DemodBufferLen);
+ if (DemodBufferLen==64){
+ for( idx=0; idx<64; idx++) {
+ uid1=(uid1<<1)|(uid2>>31);
+ if (DemodBuffer[idx] == 0) {
+ uid2=(uid2<<1)|0;
+ showbits[idx]='0';
+ } else {
+ uid2=(uid2<<1)|1;
+ showbits[idx]='1';
+ }
+ }
+ showbits[idx]='\0';
+ PrintAndLog("Indala UID=%s (%x%08x)", showbits, uid1, uid2);
+ }
+ else {
+ uid3=0;
+ uid4=0;
+ uid5=0;
+ uid6=0;
+ uid7=0;
+ for( idx=0; idx<DemodBufferLen; idx++) {
+ uid1=(uid1<<1)|(uid2>>31);
+ uid2=(uid2<<1)|(uid3>>31);
+ uid3=(uid3<<1)|(uid4>>31);
+ uid4=(uid4<<1)|(uid5>>31);
+ uid5=(uid5<<1)|(uid6>>31);
+ uid6=(uid6<<1)|(uid7>>31);
+ if (DemodBuffer[idx] == 0) {
+ uid7=(uid7<<1)|0;
+ showbits[idx]='0';
+ }
+ else {
+ uid7=(uid7<<1)|1;
+ showbits[idx]='1';
+ }
+ }
+ showbits[idx]='\0';
+ PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
+ }
+ return 1;
+}
+
+/*
+//by marshmellow (attempt to get rid of high immediately after a low)
+void pskCleanWave2(uint8_t *bitStream, int bitLen)
+{
+ int i;
+ int low=128;
+ int gap = 4;
+ // int loopMax = 2048;
+ int newLow=0;
+
+ for (i=0; i<bitLen; ++i)
+ if (bitStream[i]<low) low=bitStream[i];
+
+ low = (int)(((low-128)*.80)+128);
+ PrintAndLog("low: %d",low);
+ for (i=0; i<bitLen; ++i){
+ if (newLow==1){
+ bitStream[i]=low+5;
+ gap--;
+ if (gap==0){
+ newLow=0;
+ gap=4;
+ }
+ }
+ if (bitStream[i]<=low) newLow=1;
+ }
+ return;
+}
+*/
+int CmdPskClean(const char *Cmd)
+{
+ uint8_t bitStream[MAX_GRAPH_TRACE_LEN]={0};
+ int bitLen = getFromGraphBuf(bitStream);
+ pskCleanWave(bitStream, bitLen);
+ setGraphBuf(bitStream, bitLen);
+ return 0;
+}
+
+//by marshmellow
+//takes 2 arguments - clock and invert both as integers
+//attempts to demodulate ask only
+//prints binary found and saves in graphbuffer for further commands
+int CmdpskNRZrawDemod(const char *Cmd)
+{
+ int errCnt= PSKnrzDemod(Cmd);
+ //output
+ if (errCnt<0) return 0;
+ if (errCnt>0){
+ PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ }
+ PrintAndLog("PSK or NRZ demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
+
+ return 1;
+}
+
+
+
int CmdGrid(const char *Cmd)
{
sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
if (max != min) {
for (i = 0; i < GraphTraceLen; ++i) {
- GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 1000 /
- (max - min);
+ GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
+ (max - min);
+ //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
}
}
RepaintGraphWindow();
{"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
{"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
{"dec", CmdDec, 1, "Decimate samples"},
- {"detectaskclock",CmdDetectClockRate, 1, "Detect ASK clock rate"},
+ {"detectclock", CmdDetectClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
{"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
{"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate graph window as a HID FSK using raw"},
{"fskiodemod", CmdFSKdemodIO, 1, "Demodulate graph window as an IO Prox FSK using raw"},
{"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
{"manrawdecode", Cmdmandecoderaw, 1, "Manchester decode binary stream already in graph buffer"},
{"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"},
- {"norm", CmdNorm, 1, "Normalize max/min to +/-500"},
+ {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
{"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
+ {"pskclean", CmdPskClean, 1, "Attempt to clean psk wave"},
+ {"pskdetectclock",CmdDetectNRZpskClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
+ {"pskindalademod",CmdIndalaDecode, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk indala tags and output ID binary & hex (args optional[clock will try Auto-detect])"},
+ {"psknrzrawdemod",CmdpskNRZrawDemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk or nrz tags and output binary (args optional[clock will try Auto-detect])"},
{"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window"},
- {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
{"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
{"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
{"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
- {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
{"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
+ {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
+ {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
{NULL, NULL, 0, NULL}
};
command_t * CmdDataCommands();
int CmdData(const char *Cmd);
-
+void printDemodBuff();
int CmdAmp(const char *Cmd);
int Cmdaskdemod(const char *Cmd);
int Cmdaskrawdemod(const char *Cmd);
int CmdFSKdemodHID(const char *Cmd);
int CmdFSKdemodIO(const char *Cmd);
int CmdFSKrawdemod(const char *Cmd);
+int CmdDetectNRZpskClockRate(const char *Cmd);
+int CmdpskNRZrawDemod(const char *Cmd);
int CmdGrid(const char *Cmd);
int CmdHexsamples(const char *Cmd);
int CmdHide(const char *Cmd);
int CmdThreshold(const char *Cmd);
int CmdDirectionalThreshold(const char *Cmd);
int CmdZerocrossings(const char *Cmd);
+int CmdIndalaDecode(const char *Cmd);
+
+#define MAX_DEMOD_BUF_LEN (1024*128)
+extern uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
+extern int DemodBufferLen;
#endif
}
}
-#define LONG_WAIT 100
+ #define LONG_WAIT 100
int start;
for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
int first = GraphBuffer[start];
ans=CmdSamples("20000");
}
if (GraphTraceLen<1000) return 0;
+ PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
PrintAndLog("Checking for known tags:");
+
ans=Cmdaskmandemod("");
- if (ans>0) return 1;
+ if (ans>0) {
+ PrintAndLog("Valid EM410x ID Found!");
+ return 1;
+ }
ans=CmdFSKdemodHID("");
- if (ans>0) return 1;
+ if (ans>0) {
+ PrintAndLog("Valid HID Prox ID Found!");
+ return 1;
+ }
ans=CmdFSKdemodIO("");
- if (ans>0) return 1;
+ if (ans>0) {
+ PrintAndLog("Valid IO Prox ID Found!");
+ return 1;
+ }
//add psk and indala
- ans=CmdIndalaDemod("");
- if (ans>0) return 1;
- ans=CmdIndalaDemod("224");
- if (ans>0) return 1;
+ ans=CmdIndalaDecode("");
+ if (ans>0) {
+ PrintAndLog("Valid Indala ID Found!");
+ return 1;
+ }
+ // ans=CmdIndalaDemod("224");
+ // if (ans>0) return 1;
PrintAndLog("No Known Tags Found!\n");
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
- {"em410xdemod", CmdEMdemodASK, 0, "[clock rate] -- Extract ID from EM410x tag"},
+ {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
{"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
{"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
{"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
int i=0;
ClearGraph(0);
for (; i < size; ++i){
- GraphBuffer[i]=buff[i];
+ GraphBuffer[i]=buff[i]-128;
}
GraphTraceLen=size;
RepaintGraphWindow();
return clock;
}
+int GetNRZpskClock(const char *str, int peak, int verbose)
+{
+ // return GetClock(str,peak,verbose);
+ int clock;
+ // int clock2;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+
+ /* Auto-detect clock */
+ if (!clock)
+ {
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ int size = getFromGraphBuf(grph);
+ clock = DetectpskNRZClock(grph,size,0);
+ //clock2 = DetectClock2(peak);
+ /* Only print this message if we're not looping something */
+ if (!verbose){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ //PrintAndLog("clock2: %d",clock2);
+ }
+ }
+ return clock;
+}
+// Get or auto-detect clock rate
+/*
+int GetNRZpskClock(const char *str, int peak, int verbose)
+{
+ int clock;
+// int clock2;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+
+ // Auto-detect clock
+ if (!clock)
+ {
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ int size = getFromGraphBuf(grph);
+ clock = DetectASKClock(grph,size,0);
+ //clock2 = DetectClock2(peak);
+ // Only print this message if we're not looping something
+ if (!verbose){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ //PrintAndLog("clock2: %d",clock2);
+ }
+ }
+ return clock;
+}
+*/
\ No newline at end of file
//int DetectClock(int peak);
int getFromGraphBuf(uint8_t *buff);
int GetClock(const char *str, int peak, int verbose);
+int GetNRZpskClock(const char *str, int peak, int verbose);
void setGraphBuf(uint8_t *buff,int size);
#define MAX_GRAPH_TRACE_LEN (1024*128)
//by marshmellow
//takes 1s and 0s and searches for EM410x format - output EM ID
-uint64_t Em410xDecode(uint8_t *BitStream,uint32_t BitLen)
+uint64_t Em410xDecode(uint8_t *BitStream, int BitLen)
{
//no arguments needed - built this way in case we want this to be a direct call from "data " cmds in the future
// otherwise could be a void with no arguments
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask while decoding manchester
//prints binary found and saves in graphbuffer for further commands
-int askmandemod(uint8_t * BinStream,uint32_t *BitLen,int *clk, int *invert)
+int askmandemod(uint8_t * BinStream, int *BitLen,int *clk, int *invert)
{
int i;
int high = 0, low = 128;
low = dest[i];
}
}
- peak=(int)((peak-128)*.75)+128;
- low= (int)((low-128)*.75)+128;
+ peak=(int)(((peak-128)*.75)+128);
+ low= (int)(((low-128)*.75)+128);
int ii;
int clkCnt;
int tol = 0;
- int bestErr=1000;
- int errCnt[]={0,0,0,0,0,0,0,0};
+ int bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000};
+ int errCnt=0;
//test each valid clock from smallest to greatest to see which lines up
for(clkCnt=0; clkCnt<6;++clkCnt){
if (clk[clkCnt]==32){
}else{
tol=0;
}
- bestErr=1000;
+ bestErr[clkCnt]=1000;
//try lining up the peaks by moving starting point (try first 256)
for (ii=0; ii<loopCnt; ++ii){
if ((dest[ii]>=peak) || (dest[ii]<=low)){
- errCnt[clkCnt]=0;
+ errCnt=0;
// now that we have the first one lined up test rest of wave array
for (i=0; i<((int)(size/clk[clkCnt])-1); ++i){
if (dest[ii+(i*clk[clkCnt])]>=peak || dest[ii+(i*clk[clkCnt])]<=low){
}else if(dest[ii+(i*clk[clkCnt])-tol]>=peak || dest[ii+(i*clk[clkCnt])-tol]<=low){
}else if(dest[ii+(i*clk[clkCnt])+tol]>=peak || dest[ii+(i*clk[clkCnt])+tol]<=low){
}else{ //error no peak detected
- errCnt[clkCnt]++;
+ errCnt++;
+ }
+ }
+ //if we found no errors this is correct one - return this clock
+ if(errCnt==0) return clk[clkCnt];
+ //if we found errors see if it is lowest so far and save it as best run
+ if(errCnt<bestErr[clkCnt]) bestErr[clkCnt]=errCnt;
+ }
+ }
+ }
+ int iii=0;
+ int best=0;
+ for (iii=0; iii<7;++iii){
+ if (bestErr[iii]<bestErr[best]){
+ // current best bit to error ratio vs new bit to error ratio
+ if (((size/clk[best])/bestErr[best]<(size/clk[iii])/bestErr[iii]) ){
+ best = iii;
+ }
+ }
+ }
+ return clk[best];
+}
+int DetectpskNRZClock(uint8_t dest[], size_t size, int clock)
+{
+ int i=0;
+ int peak=0;
+ int low=128;
+ int clk[]={16,32,40,50,64,100,128,256};
+ int loopCnt = 2048; //don't need to loop through entire array...
+ if (size<loopCnt) loopCnt = size;
+
+ //if we already have a valid clock quit
+ for (;i<8;++i)
+ if (clk[i]==clock) return clock;
+
+ //get high and low peak
+ for (i=0;i<loopCnt;++i){
+ if(dest[i]>peak){
+ peak = dest[i];
+ }
+ if(dest[i]<low){
+ low = dest[i];
+ }
+ }
+ peak=(int)(((peak-128)*.90)+128);
+ low= (int)(((low-128)*.90)+128);
+ //PrintAndLog("DEBUG: peak: %d, low: %d",peak,low);
+ int ii;
+ int clkCnt;
+ int tol = 0;
+ int peakcnt=0;
+ int errCnt=0;
+ int bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000,1000};
+ int peaksdet[]={0,0,0,0,0,0,0,0,0};
+ //test each valid clock from smallest to greatest to see which lines up
+ for(clkCnt=0; clkCnt<6;++clkCnt){
+ if (clk[clkCnt]==32){
+ tol=0;
+ }else{
+ tol=0;
+ }
+ //try lining up the peaks by moving starting point (try first 256)
+ for (ii=0; ii<loopCnt; ++ii){
+ if ((dest[ii]>=peak) || (dest[ii]<=low)){
+ errCnt=0;
+ peakcnt=0;
+ // now that we have the first one lined up test rest of wave array
+ for (i=0; i<((int)(size/clk[clkCnt])-1); ++i){
+ if (dest[ii+(i*clk[clkCnt])]>=peak || dest[ii+(i*clk[clkCnt])]<=low){
+ peakcnt++;
+ }else if(dest[ii+(i*clk[clkCnt])-tol]>=peak || dest[ii+(i*clk[clkCnt])-tol]<=low){
+ peakcnt++;
+ }else if(dest[ii+(i*clk[clkCnt])+tol]>=peak || dest[ii+(i*clk[clkCnt])+tol]<=low){
+ peakcnt++;
+ }else{ //error no peak detected
+ errCnt++;
+ }
+ }
+ if(peakcnt>peaksdet[clkCnt]) {
+ peaksdet[clkCnt]=peakcnt;
+ bestErr[clkCnt]=errCnt;
+ }
+ }
+ }
+ }
+ int iii=0;
+ int best=0;
+ //int ratio2; //debug
+ int ratio;
+ //int bits;
+ for (iii=0; iii<7;++iii){
+ ratio=1000;
+ //ratio2=1000; //debug
+ //bits=size/clk[iii]; //debug
+ if (peaksdet[iii]>0){
+ ratio=bestErr[iii]/peaksdet[iii];
+ if (((bestErr[best]/peaksdet[best])>(ratio)+1)){
+ best = iii;
+ }
+ //ratio2=bits/peaksdet[iii]; //debug
+ }
+ //PrintAndLog("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d, ratio: %d, bits: %d, peakbitr: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best],ratio, bits,ratio2);
+ }
+ return clk[best];
+}
+
+/*
+int DetectNRZpskClock(uint8_t dest[], size_t size, int clock)
+{
+ int i=0;
+ int peak=0;
+ int low=128;
+ int clk[]={16,32,40,50,64,100,128,256};
+ int loopCnt = 1500; //don't need to loop through entire array...
+ if (size<loopCnt) loopCnt = size;
+
+ //if we already have a valid clock quit
+ for (;i<8;++i)
+ if (clk[i]==clock) return clock;
+
+ //get high and low peak
+ for (i=0;i<loopCnt;++i){
+ if(dest[i]>peak){
+ peak = dest[i];
+ }
+ if(dest[i]<low){
+ low = dest[i];
+ }
+ }
+ peak=(int)((peak-128)*.75)+128;
+ low= (int)((low-128)*.75)+128;
+ int ii;
+ int clkCnt;
+ int tol = 0;
+ int bestErr=1000;
+ int errCnt[]={0,0,0,0,0,0,0,0};
+ int lastClk = 0;
+ uint8_t bitHigh=0;
+ uint8_t ignorewin;
+ int lowBitCnt[]={0,0,0,0,0,0,0,0};
+ int BestLowBit=0;
+ //test each valid clock from smallest to greatest to see which lines up
+ for(clkCnt=0; clkCnt<6;++clkCnt){
+ if (clk[clkCnt]==32){
+ tol=1;
+ }else{
+ tol=0;
+ }
+ ignorewin = clk[clkCnt]/8;
+ bestErr=1000;
+ //try lining up the peaks by moving starting point (try first 256)
+ for (ii=1; ii<loopCnt; ++ii){
+ if ((dest[ii]>=peak) || (dest[ii]<=low)){
+ lastClk = ii-*clk;
+ errCnt[clkCnt]=0;
+ // now that we have the first one lined up test rest of wave array
+ for (i=ii; i<size; ++i){
+ if ((dest[i]>=peak || dest[i]<=low) && (i>=lastClk+*clk-tol && i<=lastClk+*clk+tol)){
+ bitHigh=1;
+ lastClk=lastClk+*clk;
+ ignorewin=clk[clkCnt]/8;
+ }else if(dest[i]<peak && dest[i]>low) {
+ if (ignorewin==0){
+ bitHigh=0;
+ }else ignorewin--;
+ if (i>=lastClk+*clk+tol){ //past possible bar
+ lowBitCnt[clkCnt]++;
+ }
+ }else if ((dest[i]>=peak || dest[i]<=low) && (i<lastClk+*clk-tol || i>=lastClk+*clk+tol) && (bitHigh==0)){
+ //error bar found no clock...
+ errCnt[clkCnt]++;
}
}
//if we found no errors this is correct one - return this clock
- if(errCnt[clkCnt]==0) return clk[clkCnt];
+ if(errCnt[clkCnt]==0 && lowBitCnt[clkCnt]==0) return clk[clkCnt];
//if we found errors see if it is lowest so far and save it as best run
if(errCnt[clkCnt]<bestErr) bestErr=errCnt[clkCnt];
+ if(lowBitCnt[clkCnt]<BestLowBit && errCnt[clkCnt]==bestErr) BestLowBit=lowBitCnt[clkCnt];
}
}
}
int iii=0;
int best=0;
- for (iii=0; iii<6;++iii){
+ int best2=0;
+ //get best run
+ for (iii=0; iii<7;++iii){
if (errCnt[iii]<errCnt[best]){
best = iii;
}
+ if (lowBitCnt[iii]<lowBitCnt[best2]){
+ best2=iii;
+ }
+ }
+ //adjust best to one with least low bit counts (as long as no errors)
+ if (best!=best2){
+ if (errCnt[best]==errCnt[best2]) best = best2;
}
return clk[best];
}
+*/
+
+//by marshmellow (attempt to get rid of high immediately after a low)
+void pskCleanWave(uint8_t *bitStream, int bitLen)
+{
+ int i;
+ int low=128;
+ int high=0;
+ int gap = 4;
+ // int loopMax = 2048;
+ int newLow=0;
+ int newHigh=0;
+ for (i=0; i<bitLen; ++i){
+ if (bitStream[i]<low) low=bitStream[i];
+ if (bitStream[i]>high) high=bitStream[i];
+ }
+ high = (int)(((high-128)*.80)+128);
+ low = (int)(((low-128)*.90)+128);
+ //low = (uint8_t)(((int)(low)-128)*.80)+128;
+ for (i=0; i<bitLen; ++i){
+ if (newLow==1){
+ bitStream[i]=low+8;
+ gap--;
+ if (gap==0){
+ newLow=0;
+ gap=4;
+ }
+ }else if (newHigh==1){
+ bitStream[i]=high-8;
+ gap--;
+ if (gap==0){
+ newHigh=0;
+ gap=4;
+ }
+ }
+ if (bitStream[i]<=low) newLow=1;
+ if (bitStream[i]>=high) newHigh=1;
+ }
+ return;
+}
+
+int indala26decode(uint8_t *bitStream, int *bitLen, uint8_t *invert)
+{
+ //26 bit 40134 format (don't know other formats)
+ // Finding the start of a UID
+ int i;
+ int long_wait;
+ //uidlen = 64;
+ long_wait = 29;//29 leading zeros in format
+ int start;
+ int first = 0;
+ int first2 = 0;
+ int bitCnt = 0;
+ int ii;
+ for (start = 0; start <= *bitLen - 250; start++) {
+ first = bitStream[start];
+ for (i = start; i < start + long_wait; i++) {
+ if (bitStream[i] != first) {
+ break;
+ }
+ }
+ if (i == (start + long_wait)) {
+ break;
+ }
+ }
+ if (start == *bitLen - 250 + 1) {
+ // did not find start sequence
+ return -1;
+ }
+ //found start once now test length by finding next one
+ // Inverting signal if needed
+ if (first == 1) {
+ for (i = start; i < *bitLen; i++) {
+ bitStream[i] = !bitStream[i];
+ }
+ *invert = 1;
+ }else *invert=0;
+
+ int iii;
+ for (ii=start+29; ii <= *bitLen - 250; ii++) {
+ first2 = bitStream[ii];
+ for (iii = ii; iii < ii + long_wait; iii++) {
+ if (bitStream[iii] != first2) {
+ break;
+ }
+ }
+ if (iii == (ii + long_wait)) {
+ break;
+ }
+ }
+ if (ii== *bitLen - 250 + 1){
+ // did not find second start sequence
+ return -2;
+ }
+ bitCnt=ii-start;
+
+ // Dumping UID
+ i = start;
+ for (ii = 0; ii < bitCnt; ii++) {
+ bitStream[ii] = bitStream[i++];
+ //showbits[bit] = '0' + bits[bit];
+ }
+ *bitLen=bitCnt;
+ return 1;
+}
+
+int pskNRZrawDemod(uint8_t *dest, int *bitLen, int *clk, int *invert)
+{
+ pskCleanWave(dest,*bitLen);
+ int clk2 = DetectpskNRZClock(dest, *bitLen, *clk);
+ *clk=clk2;
+ uint32_t i;
+ uint8_t high=0, low=128;
+ uint32_t gLen = *bitLen;
+ if (gLen > 1280) gLen=1280;
+ // get high
+ for (i=0; i<gLen; ++i){
+ if (dest[i]>high) high = dest[i];
+ if (dest[i]<low) low=dest[i];
+ }
+ //fudge high/low bars by 25%
+ high = (uint8_t)((((int)(high)-128)*.75)+128);
+ low = (uint8_t)((((int)(low)-128)*.80)+128);
+
+ //PrintAndLog("DEBUG - valid high: %d - valid low: %d",high,low);
+ int lastBit = 0; //set first clock check
+ uint32_t bitnum = 0; //output counter
+ uint8_t tol = 0; //clock tolerance adjust - waves will be accepted as within the clock if they fall + or - this value + clock from last valid wave
+ if (*clk==32)tol=2; //clock tolerance may not be needed anymore currently set to + or - 1 but could be increased for poor waves or removed entirely
+ uint32_t iii = 0;
+ uint8_t errCnt =0;
+ uint32_t bestStart = *bitLen;
+ uint32_t maxErr = (*bitLen/1000);
+ uint32_t bestErrCnt = maxErr;
+ //uint8_t midBit=0;
+ uint8_t curBit=0;
+ uint8_t bitHigh=0;
+ uint8_t ignorewin=*clk/8;
+ //PrintAndLog("DEBUG - lastbit - %d",lastBit);
+ //loop to find first wave that works - align to clock
+ for (iii=0; iii < gLen; ++iii){
+ if ((dest[iii]>=high)||(dest[iii]<=low)){
+ lastBit=iii-*clk;
+ //loop through to see if this start location works
+ for (i = iii; i < *bitLen; ++i) {
+ //if we found a high bar and we are at a clock bit
+ if ((dest[i]>=high ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
+ bitHigh=1;
+ lastBit+=*clk;
+ //curBit=1-*invert;
+ //dest[bitnum]=curBit;
+ ignorewin=*clk/8;
+ bitnum++;
+ //else if low bar found and we are at a clock point
+ }else if ((dest[i]<=low ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
+ bitHigh=1;
+ lastBit+=*clk;
+ ignorewin=*clk/8;
+ //curBit=*invert;
+ //dest[bitnum]=curBit;
+ bitnum++;
+ //else if no bars found
+ }else if(dest[i]<high && dest[i]>low) {
+ if (ignorewin==0){
+ bitHigh=0;
+ }else ignorewin--;
+ //if we are past a clock point
+ if (i>=lastBit+*clk+tol){ //clock val
+ //dest[bitnum]=curBit;
+ lastBit+=*clk;
+ bitnum++;
+ }
+ //else if bar found but we are not at a clock bit and we did not just have a clock bit
+ }else if ((dest[i]>=high || dest[i]<=low) && (i<lastBit+*clk-tol || i>lastBit+*clk+tol) && (bitHigh==0)){
+ //error bar found no clock...
+ errCnt++;
+ }
+ if (bitnum>=1000) break;
+ }
+ //we got more than 64 good bits and not all errors
+ if ((bitnum > (64+errCnt)) && (errCnt<(maxErr))) {
+ //possible good read
+ if (errCnt==0){
+ bestStart = iii;
+ bestErrCnt=errCnt;
+ break; //great read - finish
+ }
+ if (bestStart == iii) break; //if current run == bestErrCnt run (after exhausted testing) then finish
+ if (errCnt<bestErrCnt){ //set this as new best run
+ bestErrCnt=errCnt;
+ bestStart = iii;
+ }
+ }
+ }
+ }
+ if (bestErrCnt<maxErr){
+ //best run is good enough set to best run and set overwrite BinStream
+ iii=bestStart;
+ lastBit=bestStart-*clk;
+ bitnum=0;
+ for (i = iii; i < *bitLen; ++i) {
+ //if we found a high bar and we are at a clock bit
+ if ((dest[i]>=high ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
+ bitHigh=1;
+ lastBit+=*clk;
+ curBit=1-*invert;
+ dest[bitnum]=curBit;
+ ignorewin=*clk/8;
+ bitnum++;
+ //else if low bar found and we are at a clock point
+ }else if ((dest[i]<=low ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
+ bitHigh=1;
+ lastBit+=*clk;
+ curBit=*invert;
+ dest[bitnum]=curBit;
+ ignorewin=*clk/8;
+ bitnum++;
+ //else if no bars found
+ }else if(dest[i]<high && dest[i]>low) {
+ if (ignorewin==0){
+ bitHigh=0;
+ }else ignorewin--;
+ //if we are past a clock point
+ if (i>=lastBit+*clk+tol){ //clock val
+ lastBit+=*clk;
+ dest[bitnum]=curBit;
+ bitnum++;
+ }
+ //else if bar found but we are not at a clock bit and we did not just have a clock bit
+ }else if ((dest[i]>=high || dest[i]<=low) && ((i<lastBit+*clk-tol) || (i>lastBit+*clk+tol)) && (bitHigh==0)){
+ //error bar found no clock...
+ bitHigh=1;
+ dest[bitnum]=77;
+ bitnum++;
+ errCnt++;
+ }
+ if (bitnum >=1000) break;
+ }
+ *bitLen=bitnum;
+ } else{
+ *bitLen=bitnum;
+ *clk=bestStart;
+ return -1;
+ }
+
+ if (bitnum>16){
+ *bitLen=bitnum;
+ } else return -1;
+ return errCnt;
+}
+
+
+ /*not needed?
+ uint32_t i;
+ uint8_t high=0, low=128;
+ uint32_t loopMax = 1280; //20 raw bits
+
+ // get high
+ if (size<loopMax) return -1;
+ for (i=0; i<loopMax; ++i){
+ if (dest[i]>high) high = dest[i];
+ if (dest[i]<low) low=dest[i];
+ }
+ //fudge high/low bars by 25%
+ high = (uint8_t)(((int)(high)-128)*.75)+128;
+ low = (uint8_t)(((int)(low)-128)*.75)+128;
+
+ //clean waves
+ for (i=0;i<size; ++i){
+ if (dest[i]>=high) dest[i]=high;
+ else if(dest[i]<=low) dest[i]=low;
+ else dest[i]=0;
+ }
+ */
#include <stdint.h>
int DetectASKClock(uint8_t dest[], size_t size, int clock);
-int askmandemod(uint8_t *BinStream,uint32_t *BitLen,int *clk, int *invert);
-uint64_t Em410xDecode(uint8_t *BitStream,uint32_t BitLen);
+int askmandemod(uint8_t *BinStream,int *BitLen,int *clk, int *invert);
+uint64_t Em410xDecode(uint8_t *BitStream,int BitLen);
int manrawdecode(uint8_t *BitStream, int *bitLen);
int BiphaseRawDecode(uint8_t * BitStream, int *bitLen, int offset);
int askrawdemod(uint8_t *BinStream, int *bitLen,int *clk, int *invert);
int IOdemodFSK(uint8_t *dest, size_t size);
int fskdemod(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t invert, uint8_t fchigh, uint8_t fclow);
uint32_t bytebits_to_byte(uint8_t* src, int numbits);
+int pskNRZrawDemod(uint8_t *dest, int *bitLen, int *clk, int *invert);
+int DetectpskNRZClock(uint8_t dest[], size_t size, int clock);
+int indala26decode(uint8_t *bitStream, int *bitLen, uint8_t *invert);
+void pskCleanWave(uint8_t *bitStream, int bitLen);
#endif
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The files 'modulation-'... are all encoded with identical data (hex 00 01 02 03 04 05 06 07 08 09 0A 0B)
for the purpose of recognition and testing of demodulation schemes. They were created by writing Q5 tags
appropriately configured. The raw data is in 'modulation-data.dat'.
+
+ata5577-HIDemu-FC1-C9.pm3: ata5577 in hid prox 26 bit emulation facility code:1 card#:9
+casi-12ed825c29.pm3: casi rusco 40 bit (EM410x ID: 12ed825c29)
+EM4102-Fob.pm3: (ID: 0400193cbe)
+ioprox-XSF-01-3B-44725.pm3: IO Prox FSK RF/64 ID in name
+ioprox-XSF-01-BE-03011.pm3: IO Prox FSK RF/64 ID in name
+indala-504278295.pm3: PSK 26 bit indala
\ No newline at end of file
projects / proxmark3-svn / commitdiff