#include "util.h"
#include "cmdmain.h"
#include "cmddata.h"
+#include "lfdemod.h"
static int CmdHelp(const char *Cmd);
else if (GraphBuffer[i] < low)
low = GraphBuffer[i];
}
+ high=abs(high*.75);
+ low=abs(low*.75);
if (c != 0 && c != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
return 0;
}
-void printBitStream(int BitStream[], uint32_t bitLen){
- uint32_t i = 0;
- if (bitLen<16) return;
- if (bitLen>512) bitLen=512;
- 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",
- BitStream[i],
- BitStream[i+1],
- BitStream[i+2],
- BitStream[i+3],
- BitStream[i+4],
- BitStream[i+5],
- BitStream[i+6],
- BitStream[i+7],
- BitStream[i+8],
- BitStream[i+9],
- BitStream[i+10],
- BitStream[i+11],
- BitStream[i+12],
- BitStream[i+13],
- BitStream[i+14],
- BitStream[i+15]);
- }
- return;
-}
-void printBitStream2(uint8_t BitStream[], uint32_t bitLen){
+//by marshmellow
+void printBitStream(uint8_t BitStream[], uint32_t bitLen)
+{
uint32_t i = 0;
if (bitLen<16) {
PrintAndLog("Too few bits found: %d",bitLen);
return;
}
if (bitLen>512) bitLen=512;
- for (i = 0; i < (bitLen-16); i+=16) {
+ 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",
BitStream[i],
BitStream[i+1],
}
return;
}
+//by marshmellow
+void printEM410x(uint64_t id)
+{
+ if (id !=0){
+ uint64_t iii=1;
+ uint64_t id2lo=0; //id2hi=0,
+ uint32_t ii=0;
+ uint32_t i=0;
+ for (ii=5; ii>0;ii--){
+ for (i=0;i<8;i++){
+ id2lo=(id2lo<<1LL)|((id & (iii<<(i+((ii-1)*8))))>>(i+((ii-1)*8)));
+ }
+ }
+ //output em id
+ PrintAndLog("EM TAG ID : %010llx", id);
+ PrintAndLog("Unique TAG ID: %010llx", id2lo); //id2hi,
+ PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
+ PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFF);
+ PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
+ PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
+ PrintAndLog("DEZ 14/IK2 : %014lld",id);
+ PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
+ PrintAndLog("Other : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
+ }
+ return;
+}
//by marshmellow
-//takes 1s and 0s and searches for EM410x format - output EM ID
-int Em410xDecode(const char *Cmd)
+int CmdEm410xDecode(const char *Cmd)
{
- //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
- //set defaults
- int high=0, low=0;
- uint32_t hi=0, lo=0;
+ uint64_t id=0;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ uint32_t i=0;
+ i=getFromGraphBuf(BitStream);
+ id = Em410xDecode(BitStream,i);
+ printEM410x(id);
+ if (id>0) return 1;
+ return 0;
+}
- uint32_t i = 0;
- uint32_t initLoopMax = 1000;
- if (initLoopMax>GraphTraceLen) initLoopMax=GraphTraceLen;
- for (;i < initLoopMax; ++i) //1000 samples should be plenty to find high and low values
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
+//by marshmellow
+//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 Cmdaskmandemod(const char *Cmd)
+{
+ int invert=0;
+ int clk=0;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ sscanf(Cmd, "%i %i", &clk, &invert);
+ if (invert != 0 && invert != 1) {
+ PrintAndLog("Invalid argument: %s", Cmd);
+ return 0;
}
- if (((high !=1)||(low !=0))){ //allow only 1s and 0s
- PrintAndLog("no data found");
+ uint32_t 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)
+ // 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
+ if (errCnt>0){
+ PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
}
- uint8_t parityTest=0;
- // 111111111 bit pattern represent start of frame
- int frame_marker_mask[] = {1,1,1,1,1,1,1,1,1};
- uint32_t idx = 0;
- uint32_t ii=0;
- uint8_t resetCnt = 0;
- while( (idx + 64) < GraphTraceLen) {
-restart:
- // search for a start of frame marker
- if ( memcmp(GraphBuffer+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
- { // frame marker found
- idx+=9;//sizeof(frame_marker_mask);
- for (i=0; i<10;i++){
- for(ii=0; ii<5; ++ii){
- parityTest += GraphBuffer[(i*5)+ii+idx];
- }
- if (parityTest== ((parityTest>>1)<<1)){
- parityTest=0;
- for (ii=0; ii<4;++ii){
- hi = (hi<<1)|(lo>>31);
- lo=(lo<<1)|(GraphBuffer[(i*5)+ii+idx]);
- }
- //PrintAndLog("DEBUG: EM parity passed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d,lo: %d",parityTest,i,ii,idx,GraphBuffer[idx+ii+(i*5)-5],GraphBuffer[idx+ii+(i*5)-4],GraphBuffer[idx+ii+(i*5)-3],GraphBuffer[idx+ii+(i*5)-2],GraphBuffer[idx+ii+(i*5)-1],lo);
- }else {//parity failed
- //PrintAndLog("DEBUG: EM parity failed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d",parityTest,i,ii,idx,GraphBuffer[idx+ii+(i*5)-5],GraphBuffer[idx+ii+(i*5)-4],GraphBuffer[idx+ii+(i*5)-3],GraphBuffer[idx+ii+(i*5)-2],GraphBuffer[idx+ii+(i*5)-1]);
- parityTest=0;
- idx-=8;
- if (resetCnt>5)return 0;
- resetCnt++;
- goto restart;//continue;
- }
- }
- //skip last 5 bit parity test for simplicity.
-
- //output em id
- PrintAndLog("EM TAG ID : %02x%08x", hi, lo);
- //get Unique ID
- uint32_t iii=1;
- uint32_t id2hi=0,id2lo=0;
- for (i=0;i<8;i++){
- id2hi=(id2hi<<1)|((hi & (iii<<(i)))>>i);
- }
- for (ii=4; ii>0;ii--){
- for (i=0;i<8;i++){
- id2lo=(id2lo<<1)|((lo & (iii<<(i+((ii-1)*8))))>>(i+((ii-1)*8)));
- }
- }
- PrintAndLog("Unique TAG ID: %02x%08x", id2hi, id2lo);
- PrintAndLog("DEZ 8 : %08d",lo & 0xFFFFFF);
- PrintAndLog("DEZ 10 : %010d",lo & 0xFFFFFF);
- PrintAndLog("DEZ 5.5 : %05d.%05d",(lo>>16) & 0xFFFF,lo & 0xFFFF);
- PrintAndLog("DEZ 3.5A : %03d.%05d",hi,lo &0xFFFF);
- return 0;
- }else{
- idx++;
- }
+ PrintAndLog("ASK/Manchester decoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printBitStream(BitStream,BitLen);
+ 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;
}
+ //if (BitLen>16) return 1;
return 0;
}
+//by marshmellow
+//manchester decode
+//stricktly take 10 and 01 and convert to 0 and 1
+int Cmdmandecoderaw(const char *Cmd)
+{
+ int i =0;
+ int errCnt=0;
+ 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];
+ }
+ if (high>1 || low <0 ){
+ PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
+ return 0;
+ }
+ bitnum=i;
+ errCnt=manrawdecode(BitStream,&bitnum);
+ if (errCnt>=20){
+ PrintAndLog("Too many errors: %d",errCnt);
+ return 0;
+ }
+ 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);
+ printEM410x(id);
+ }
+ return 1;
+}
//by marshmellow
-//takes 2 arguments - clock and invert both as integers
+//biphase decode
+//take 01 or 10 = 0 and 11 or 00 = 1
+//takes 1 argument "offset" default = 0 if 1 it will shift the decode by one bit
+// since it is not like manchester and doesn't have an incorrect bit pattern we
+// cannot determine if our decode is correct or if it should be shifted by one bit
+// the argument offset allows us to manually shift if the output is incorrect
+// (better would be to demod and decode at the same time so we can distinguish large
+// width waves vs small width waves to help the decode positioning) or askbiphdemod
+int CmdBiphaseDecodeRaw(const char *Cmd)
+{
+ int i = 0;
+ int errCnt=0;
+ int bitnum=0;
+ int offset=0;
+ int high=0, low=0;
+ 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];
+ }
+ if (high>1 || low <0){
+ PrintAndLog("Error: please raw demod the wave first then decode");
+ return 0;
+ }
+ bitnum=i;
+ errCnt=BiphaseRawDecode(BitStream,&bitnum, offset);
+ if (errCnt>=20){
+ PrintAndLog("Too many errors attempting to decode: %d",errCnt);
+ return 0;
+ }
+ PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
+ printBitStream(BitStream,bitnum);
+ PrintAndLog("\nif bitstream does not look right try offset=1");
+ return 1;
+}
+
+
+//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 Cmdaskrawdemod(const char *Cmd)
{
uint32_t i;
- int invert=0; //invert default
- int high = 0, low = 0;
- int clk=64; //clock default
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0};
- sscanf(Cmd, "%i %i", &clk, &invert);
- if (!(clk>8)){
- PrintAndLog("Invalid argument: %s",Cmd);
- return 0;
- }
+ int invert=0;
+ int clk=0;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ sscanf(Cmd, "%i %i", &clk, &invert);
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
- uint32_t initLoopMax = 1000;
- if (initLoopMax>GraphTraceLen) initLoopMax=GraphTraceLen;
- // Detect high and lows
- PrintAndLog("Using Clock: %d and invert=%d",clk,invert);
- for (i = 0; i < initLoopMax; ++i) //1000 samples should be plenty to find high and low values
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
- if ((high < 30) && ((high !=1)||(low !=-1))){ //throw away static - allow 1 and -1 (in case of threshold command first)
+ 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)
PrintAndLog("no data found");
return 0;
- }
- //13% fuzz in case highs and lows aren't clipped [marshmellow]
- high=(int)(0.75*high);
- low=(int)(0.75*low);
-
- //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=1; //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;
- uint32_t gLen = GraphTraceLen;
- if (gLen > 500) gLen=500;
- uint8_t errCnt =0;
- uint32_t bestStart = GraphTraceLen;
- uint32_t bestErrCnt = (GraphTraceLen/1000);
- //PrintAndLog("DEBUG - lastbit - %d",lastBit);
-
- //loop to find first wave that works
- for (iii=0; iii < gLen; ++iii){
- if ((GraphBuffer[iii]>=high)||(GraphBuffer[iii]<=low)){
- lastBit=iii-clk;
- //loop through to see if this start location works
- for (i = iii; i < GraphTraceLen; ++i) {
- if ((GraphBuffer[i] >= high) && ((i-lastBit)>(clk-tol))){
- lastBit+=clk;
- BitStream[bitnum] = invert;
- bitnum++;
- } else if ((GraphBuffer[i] <= low) && ((i-lastBit)>(clk-tol))){
- //low found and we are expecting a bar
- lastBit+=clk;
- BitStream[bitnum] = 1-invert;
- bitnum++;
- } else {
- //mid value found or no bar supposed to be here
- if ((i-lastBit)>(clk+tol)){
- //should have hit a high or low based on clock!!
-
-
- //debug
- //PrintAndLog("DEBUG - no wave in expected area - location: %d, expected: %d-%d, lastBit: %d - resetting search",i,(lastBit+(clk-((int)(tol)))),(lastBit+(clk+((int)(tol)))),lastBit);
- if (bitnum > 0){
- BitStream[bitnum]=77;
- bitnum++;
- }
-
-
- errCnt++;
- lastBit+=clk;//skip over until hit too many errors
- if (errCnt>((GraphTraceLen/1000))){ //allow 1 error for every 1000 samples else start over
- errCnt=0;
- bitnum=0;//start over
- break;
- }
- }
- }
- }
- //we got more than 64 good bits and not all errors
- if ((bitnum > (64+errCnt)) && (errCnt<(GraphTraceLen/1000))) {
- //possible good read
- if (errCnt==0) 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 (iii>=gLen){ //exhausted test
- //if there was a ok test go back to that one and re-run the best run (then dump after that run)
- if (bestErrCnt < (GraphTraceLen/1000)) iii=bestStart;
- }
- }
- if (bitnum>16){
- PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
+ }
+ 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 < bitnum; ++i){
- GraphBuffer[i]=BitStream[i];
- }
- GraphTraceLen=bitnum;
- RepaintGraphWindow();
+
+ ClearGraph(0);
+ for (i=0; i < BitLen; ++i){
+ GraphBuffer[i]=BitStream[i];
+ }
+ GraphTraceLen=BitLen;
+ RepaintGraphWindow();
+
//output
- if (errCnt>0){
- PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
- }
- PrintAndLog("ASK decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- printBitStream2(BitStream,bitnum);
- Em410xDecode(Cmd);
- }
- return 0;
+ if (errCnt>0){
+ PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ }
+ PrintAndLog("ASK demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printBitStream(BitStream,BitLen);
+
+ return 1;
}
int CmdAutoCorr(const char *Cmd)
bit ^= 1;
AppendGraph(0, clock, bit);
-// for (j = 0; j < (int)(clock/2); j++)
-// GraphBuffer[(i * clock) + j] = bit ^ 1;
-// for (j = (int)(clock/2); j < clock; j++)
-// GraphBuffer[(i * clock) + j] = bit;
+ // for (j = 0; j < (int)(clock/2); j++)
+ // GraphBuffer[(i * clock) + j] = bit ^ 1;
+ // for (j = (int)(clock/2); j < clock; j++)
+ // GraphBuffer[(i * clock) + j] = bit;
}
RepaintGraphWindow();
}
/* Print our clock rate */
+// uses data from graphbuffer
int CmdDetectClockRate(const char *Cmd)
{
- int clock = DetectClock(0);
- PrintAndLog("Auto-detected clock rate: %d", clock);
+ GetClock("",0,0);
+ //int clock = DetectASKClock(0);
+ //PrintAndLog("Auto-detected clock rate: %d", clock);
return 0;
}
//by marshmellow
-//demod GraphBuffer wave to 0s and 1s for each wave - 0s for short waves 1s for long waves
-size_t fsk_wave_demod(int size)
-{
- uint32_t last_transition = 0;
- uint32_t idx = 1;
- uint32_t maxVal = 0;
- // we don't care about actual value, only if it's more or less than a
- // threshold essentially we capture zero crossings for later analysis
- for(idx=1; idx<size; idx++){
- if(maxVal<GraphBuffer[idx]) maxVal = GraphBuffer[idx];
- }
- // set close to the top of the wave threshold with 13% margin for error
- // less likely to get a false transition up there.
- // (but have to be careful not to go too high and miss some short waves)
- uint32_t threshold_value = (uint32_t)(maxVal*.87);
- idx=1;
- // int threshold_value = 100;
-
- // sync to first lo-hi transition, and threshold
- // PrintAndLog("FSK init complete size: %d",size);//debug
- // Need to threshold first sample
- if(GraphBuffer[0] < threshold_value) GraphBuffer[0] = 0;
- else GraphBuffer[0] = 1;
- size_t numBits = 0;
- // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
- // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere
- // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
- for(idx = 1; idx < size; idx++) {
- // threshold current value
- if (GraphBuffer[idx] < threshold_value) GraphBuffer[idx] = 0;
- else GraphBuffer[idx] = 1;
- // Check for 0->1 transition
- if (GraphBuffer[idx-1] < GraphBuffer[idx]) { // 0 -> 1 transition
- if (idx-last_transition<6){
- // do nothing with extra garbage (shouldn't be any) noise tolerance?
- } else if(idx-last_transition < 9) {
- GraphBuffer[numBits]=1;
- // Other fsk demods reverse this making the short waves 1 and long waves 0
- // this is really backwards... smaller waves will typically be 0 and larger 1 [marshmellow]
- // but will leave as is and invert when needed later
- } else{
- GraphBuffer[numBits]=0;
- }
- last_transition = idx;
- numBits++;
- // PrintAndLog("numbits %d",numBits);
- }
- }
- return numBits; //Actually, it returns the number of bytes, but each byte represents a bit: 1 or 0
-}
-uint32_t myround(float f)
-{
- if (f >= UINT_MAX) return UINT_MAX;
- return (uint32_t) (f + (float)0.5);
-}
-
-//by marshmellow (from holiman's base)
-//translate 11111100000 to 10
-size_t aggregate_bits(int size, uint8_t rfLen, uint8_t maxConsequtiveBits, uint8_t invert) //,uint8_t l2h_crossing_value
-{
- int lastval=GraphBuffer[0];
- uint32_t idx=0;
- size_t numBits=0;
- uint32_t n=1;
- uint32_t n2=0;
- for( idx=1; idx < size; idx++) {
-
- if (GraphBuffer[idx]==lastval) {
- n++;
- continue;
- }
- // if lastval was 1, we have a 1->0 crossing
- if ( GraphBuffer[idx-1]==1 ) {
- n=myround((float)(n+1)/((float)(rfLen)/(float)8)); //-2 noise tolerance
-
- // n=(n+1) / h2l_crossing_value;
- //truncating could get us into trouble
- //now we will try with actual clock (RF/64 or RF/50) variable instead
- //then devide with float casting then truncate after more acurate division
- //and round to nearest int
- //like n = (((float)n)/(float)rfLen/(float)10);
- } else {// 0->1 crossing
- n=myround((float)(n+1)/((float)(rfLen-2)/(float)10)); // as int 120/6 = 20 as float 120/(64/10) = 18 (18.75)
- //n=(n+1) / l2h_crossing_value;
- }
- if (n == 0) n = 1; //this should never happen... should we error if it does?
-
- if (n < maxConsequtiveBits) // Consecutive //when the consecutive bits are low - the noise tolerance can be high
- //if it is high then we must be careful how much noise tolerance we allow
- {
- if (invert==0){ // do not invert bits
- for (n2=0; n2<n; n2++){
- GraphBuffer[numBits+n2]=GraphBuffer[idx-1];
- }
- //memset(GraphBuffer+numBits, GraphBuffer[idx-1] , n);
- }else{ // invert bits
- for (n2=0; n2<n; n2++){
- GraphBuffer[numBits+n2]=GraphBuffer[idx-1]^1;
- }
- //memset(GraphBuffer+numBits, GraphBuffer[idx-1]^1 , n);
- }
- numBits += n;
- }
- n=0;
- lastval=GraphBuffer[idx];
- }//end for
- return numBits;
-}
-
-//by marshmellow (from holiman's base)
-// full fsk demod from GraphBuffer wave to decoded 1s and 0s (no mandemod)
-size_t fskdemod(uint8_t rfLen, uint8_t invert)
-{
- //uint8_t h2l_crossing_value = 6;
- //uint8_t l2h_crossing_value = 5;
-
- // if (rfLen==64) //currently only know settings for RF/64 change from default if option entered
- // {
- // h2l_crossing_value=8; //or 8 as 64/8 = 8
- // l2h_crossing_value=6; //or 6.4 as 64/10 = 6.4
- // }
- size_t size = GraphTraceLen;
- // FSK demodulator
- size = fsk_wave_demod(size);
- size = aggregate_bits(size,rfLen,192,invert);
- // size = aggregate_bits(size, h2l_crossing_value, l2h_crossing_value,192, invert); //192=no limit to same values
- //done messing with GraphBuffer - repaint
- RepaintGraphWindow();
- return size;
-}
-uint32_t bytebits_to_byte(int* src, int numbits)
-{
- uint32_t num = 0;
- for(int i = 0 ; i < numbits ; i++)
- {
- num = (num << 1) | (*src);
- src++;
- }
- return num;
-}
-
-//by marshmellow
-//fsk demod and print binary
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, rchigh, rclow
+//defaults: clock = 50, invert=0, rchigh=10, rclow=8 (RF/10 RF/8 (fsk2a))
int CmdFSKrawdemod(const char *Cmd)
{
- //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+ //raw fsk demod no manchester decoding no start bit finding just get binary from wave
//set defaults
- uint8_t rfLen = 50;
- uint8_t invert=0;
+ int rfLen = 50;
+ int invert=0;
+ int fchigh=10;
+ int fclow=8;
//set options from parameters entered with the command
+ sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);
+
if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
- rfLen=param_get8(Cmd, 0); //if rfLen option only is used
+ //rfLen=param_get8(Cmd, 0); //if rfLen option only is used
if (rfLen==1){
invert=1; //if invert option only is used
rfLen = 50;
} else if(rfLen==0) rfLen=50;
}
- if (strlen(Cmd)>2) {
- rfLen=param_get8(Cmd, 0); //if both options are used
- invert=param_get8(Cmd,1);
+ 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();
+
+ // 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
+ printBitStream(BitStream,size);
+ } else{
+ PrintAndLog("no FSK data found");
}
- PrintAndLog("Args invert: %d \nClock:%d",invert,rfLen);
-
- size_t size = fskdemod(rfLen,invert);
-
- PrintAndLog("FSK decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- if(size > (7*32)+2) size = (7*32)+2; //only output a max of 7 blocks of 32 bits most tags will have full bit stream inside that sample size
- printBitStream(GraphBuffer,size);
-
- ClearGraph(1);
return 0;
}
-//by marshmellow
+//by marshmellow (based on existing demod + holiman's refactor)
+//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
+//print full HID Prox ID and some bit format details if found
int CmdFSKdemodHID(const char *Cmd)
{
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
- //set defaults
- uint8_t rfLen = 50;
- uint8_t invert=0;//param_get8(Cmd, 0);
- size_t idx=0;
uint32_t hi2=0, hi=0, lo=0;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ uint32_t BitLen = getFromGraphBuf(BitStream);
//get binary from fsk wave
- size_t size = fskdemod(rfLen,invert);
-
- // final loop, go over previously decoded fsk data and now manchester decode into usable tag ID
- // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0
- int frame_marker_mask[] = {1,1,1,0,0,0};
- int numshifts = 0;
- idx = 0;
- while( idx + 6 < size) {
- // search for a start of frame marker
-
- if ( memcmp(GraphBuffer+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
- { // frame marker found
- idx+=6;//sizeof(frame_marker_mask); //size of int is >6
- while(GraphBuffer[idx] != GraphBuffer[idx+1] && idx < size-2)
- {
- // Keep going until next frame marker (or error)
- // Shift in a bit. Start by shifting high registers
- hi2 = (hi2<<1)|(hi>>31);
- hi = (hi<<1)|(lo>>31);
- //Then, shift in a 0 or one into low
- if (GraphBuffer[idx] && !GraphBuffer[idx+1]) // 1 0
- lo=(lo<<1)|0;
- else // 0 1
- lo=(lo<<1)|1;
- numshifts++;
- idx += 2;
+ size_t size = HIDdemodFSK(BitStream,BitLen,&hi2,&hi,&lo);
+ if (size<0){
+ PrintAndLog("Error demoding fsk");
+ return 0;
+ }
+ if (hi2==0 && hi==0 && lo==0) return 0;
+ if (hi2 != 0){ //extra large HID tags
+ PrintAndLog("TAG ID: %x%08x%08x (%d)",
+ (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
+ setGraphBuf(BitStream,BitLen);
+ return 1;
+ }
+ else { //standard HID tags <38 bits
+ //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
+ uint8_t fmtLen = 0;
+ uint32_t fc = 0;
+ uint32_t cardnum = 0;
+ if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
+ uint32_t lo2=0;
+ lo2=(((hi & 15) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
+ uint8_t idx3 = 1;
+ while(lo2>1){ //find last bit set to 1 (format len bit)
+ lo2=lo2>>1;
+ idx3++;
}
-
- //PrintAndLog("Num shifts: %d ", numshifts);
- // Hopefully, we read a tag and hit upon the next frame marker
- if(idx + 6 < size)
- {
- if ( memcmp(GraphBuffer+(idx), frame_marker_mask, sizeof(frame_marker_mask)) == 0)
- {
- if (hi2 != 0){ //extra large HID tags
- PrintAndLog("TAG ID: %x%08x%08x (%d)",
- (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
- }
- else { //standard HID tags <38 bits
- //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
- uint8_t bitlen = 0;
- uint32_t fc = 0;
- uint32_t cardnum = 0;
- if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
- uint32_t lo2=0;
- lo2=(((hi & 15) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
- uint8_t idx3 = 1;
- while(lo2>1){ //find last bit set to 1 (format len bit)
- lo2=lo2>>1;
- idx3++;
- }
- bitlen =idx3+19;
- fc =0;
- cardnum=0;
- if(bitlen==26){
- cardnum = (lo>>1)&0xFFFF;
- fc = (lo>>17)&0xFF;
- }
- if(bitlen==37){
- cardnum = (lo>>1)&0x7FFFF;
- fc = ((hi&0xF)<<12)|(lo>>20);
- }
- if(bitlen==34){
- cardnum = (lo>>1)&0xFFFF;
- fc= ((hi&1)<<15)|(lo>>17);
- }
- if(bitlen==35){
- cardnum = (lo>>1)&0xFFFFF;
- fc = ((hi&1)<<11)|(lo>>21);
- }
- }
- else { //if bit 38 is not set then 37 bit format is used
- bitlen= 37;
- fc =0;
- cardnum=0;
- if(bitlen==37){
- cardnum = (lo>>1)&0x7FFFF;
- fc = ((hi&0xF)<<12)|(lo>>20);
- }
- }
-
- PrintAndLog("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) bitlen, (unsigned int) fc, (unsigned int) cardnum);
- ClearGraph(1);
- return 0;
- }
- }
+ fmtLen =idx3+19;
+ fc =0;
+ cardnum=0;
+ if(fmtLen==26){
+ cardnum = (lo>>1)&0xFFFF;
+ fc = (lo>>17)&0xFF;
+ }
+ if(fmtLen==37){
+ cardnum = (lo>>1)&0x7FFFF;
+ fc = ((hi&0xF)<<12)|(lo>>20);
+ }
+ if(fmtLen==34){
+ cardnum = (lo>>1)&0xFFFF;
+ fc= ((hi&1)<<15)|(lo>>17);
+ }
+ if(fmtLen==35){
+ cardnum = (lo>>1)&0xFFFFF;
+ fc = ((hi&1)<<11)|(lo>>21);
}
- // reset
- hi2 = hi = lo = 0;
- numshifts = 0;
- }else
- {
- idx++;
}
+ else { //if bit 38 is not set then 37 bit format is used
+ fmtLen= 37;
+ fc =0;
+ cardnum=0;
+ if(fmtLen==37){
+ cardnum = (lo>>1)&0x7FFFF;
+ fc = ((hi&0xF)<<12)|(lo>>20);
+ }
+ }
+ PrintAndLog("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);
+ return 1;
}
- if (idx + sizeof(frame_marker_mask) >= size){
- PrintAndLog("start bits for hid not found");
- PrintAndLog("FSK decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- printBitStream(GraphBuffer,size);
-
- }
- ClearGraph(1);
return 0;
}
//by marshmellow
+//IO-Prox demod - FSK RF/64 with preamble of 000000001
+//print ioprox ID and some format details
int CmdFSKdemodIO(const char *Cmd)
{
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
//set defaults
- uint8_t rfLen = 64;
- uint8_t invert=1;
- size_t idx=0;
- uint8_t testMax=0;
- //test samples are not just noise
- if (GraphTraceLen < 64) return 0;
- for(idx=0;idx<64;idx++){
- if (testMax<GraphBuffer[idx]) testMax=GraphBuffer[idx];
+ int idx=0;
+ //something in graphbuffer
+ if (GraphTraceLen < 65) return 0;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ uint32_t BitLen = getFromGraphBuf(BitStream);
+ //get binary from fsk wave
+ // PrintAndLog("DEBUG: got buff");
+ idx = IOdemodFSK(BitStream,BitLen);
+ if (idx<0){
+ //PrintAndLog("Error demoding fsk");
+ return 0;
+ }
+ // PrintAndLog("DEBUG: Got IOdemodFSK");
+ if (idx==0){
+ //PrintAndLog("IO Prox Data not found - FSK Data:");
+ //if (BitLen > 92) printBitStream(BitStream,92);
+ return 0;
}
- idx=0;
- //get full binary from fsk wave
- size_t size = fskdemod(rfLen,invert);
-
- //if not just noise
- //PrintAndLog("testMax %d",testMax);
- if (testMax>40){
//Index map
//0 10 20 30 40 50 60
//| | | | | | |
//
//XSF(version)facility:codeone+codetwo (raw)
//Handle the data
- int mask[] = {0,0,0,0,0,0,0,0,0,1};
- for( idx=0; idx < (size - 74); idx++) {
- if ( memcmp(GraphBuffer + idx, mask, sizeof(mask))==0) {
- //frame marker found
- if (GraphBuffer[idx+17]==1 && GraphBuffer[idx+26]==1 && GraphBuffer[idx+35]==1 && GraphBuffer[idx+44]==1 && GraphBuffer[idx+53]==1){
- //confirmed proper separator bits found
-
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx], GraphBuffer[idx+1], GraphBuffer[idx+2], GraphBuffer[idx+3], GraphBuffer[idx+4], GraphBuffer[idx+5], GraphBuffer[idx+6], GraphBuffer[idx+7], GraphBuffer[idx+8]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+9], GraphBuffer[idx+10], GraphBuffer[idx+11],GraphBuffer[idx+12],GraphBuffer[idx+13],GraphBuffer[idx+14],GraphBuffer[idx+15],GraphBuffer[idx+16],GraphBuffer[idx+17]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+18], GraphBuffer[idx+19], GraphBuffer[idx+20],GraphBuffer[idx+21],GraphBuffer[idx+22],GraphBuffer[idx+23],GraphBuffer[idx+24],GraphBuffer[idx+25],GraphBuffer[idx+26]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+27], GraphBuffer[idx+28], GraphBuffer[idx+29],GraphBuffer[idx+30],GraphBuffer[idx+31],GraphBuffer[idx+32],GraphBuffer[idx+33],GraphBuffer[idx+34],GraphBuffer[idx+35]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+36], GraphBuffer[idx+37], GraphBuffer[idx+38],GraphBuffer[idx+39],GraphBuffer[idx+40],GraphBuffer[idx+41],GraphBuffer[idx+42],GraphBuffer[idx+43],GraphBuffer[idx+44]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+45], GraphBuffer[idx+46], GraphBuffer[idx+47],GraphBuffer[idx+48],GraphBuffer[idx+49],GraphBuffer[idx+50],GraphBuffer[idx+51],GraphBuffer[idx+52],GraphBuffer[idx+53]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d%d",GraphBuffer[idx+54],GraphBuffer[idx+55],GraphBuffer[idx+56],GraphBuffer[idx+57],GraphBuffer[idx+58],GraphBuffer[idx+59],GraphBuffer[idx+60],GraphBuffer[idx+61],GraphBuffer[idx+62],GraphBuffer[idx+63]);
-
- uint32_t code = bytebits_to_byte(GraphBuffer+idx,32);
- uint32_t code2 = bytebits_to_byte(GraphBuffer+idx+32,32);
- short version = bytebits_to_byte(GraphBuffer+idx+27,8); //14,4
- uint8_t facilitycode = bytebits_to_byte(GraphBuffer+idx+19,8) ;
- uint16_t number = (bytebits_to_byte(GraphBuffer+idx+36,8)<<8)|(bytebits_to_byte(GraphBuffer+idx+45,8)); //36,9
-
- PrintAndLog("XSF(%02d)%02x:%d (%08x%08x)",version,facilitycode,number,code,code2);
- ClearGraph(1);
- return 0;
- } else {
- PrintAndLog("thought we had a valid tag but did not match format");
- }
- }
- }
- if (idx >= (size-74)){
- PrintAndLog("start bits for io prox not found");
- PrintAndLog("FSK decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- printBitStream(GraphBuffer,size);
- }
- }
- ClearGraph(1);
- return 0;
+ if (idx+64>BitLen) return 0;
+ PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
+ PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
+
+ uint32_t code = bytebits_to_byte(BitStream+idx,32);
+ uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
+ 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);
+ return 1;
}
int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
{
RepaintGraphWindow();
return 0;
}
+int CmdRtrim(const char *Cmd)
+{
+ int ds = atoi(Cmd);
+
+ GraphTraceLen = ds;
+
+ RepaintGraphWindow();
+ return 0;
+}
/*
* Manchester demodulate a bitstream. The bitstream needs to be already in
{"help", CmdHelp, 1, "This help"},
{"amp", CmdAmp, 1, "Amplify peaks"},
{"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
- {"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate simple ASK tags and output binary (args optional-defaults='64 0')"},
+ {"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional[clock will try Auto-detect])"},
+ {"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK tags and output binary (args optional[clock will try Auto-detect])"},
{"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
+ {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] Biphase decode binary stream already in graph buffer (offset = bit to start decode from)"},
{"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
{"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
{"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
{"dec", CmdDec, 1, "Decimate samples"},
- {"detectclock", CmdDetectClockRate, 1, "Detect clock rate"},
+ {"detectaskclock",CmdDetectClockRate, 1, "Detect ASK 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"},
- {"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] Demodulate graph window from FSK to binary (clock = 64 or 50)(invert = 1 or 0)"},
+ {"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to binary (clock = 50)(invert = 1 or 0)(rchigh = 10)(rclow=8)"},
{"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
{"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
{"hide", CmdHide, 1, "Hide graph window"},
{"hpf", CmdHpf, 1, "Remove DC offset from trace"},
{"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
{"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
+ {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
{"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"},
{"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
projects / proxmark3-svn / blobdiff