X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e68862947566842c673c005dc3f94aff9c830cfc..45dda9fcd7d47018c81a86688e2aaa63ba09d018:/client/cmddata.c diff --git a/client/cmddata.c b/client/cmddata.c index 2307c8af..d8a0fcf6 100644 --- a/client/cmddata.c +++ b/client/cmddata.c @@ -20,6 +20,7 @@ #include "util.h" #include "cmdmain.h" #include "cmddata.h" +#include "lfdemod.h" static int CmdHelp(const char *Cmd); @@ -69,6 +70,7 @@ int CmdAmp(const char *Cmd) * Arguments: * c : 0 or 1 */ + //this method is dependant on all highs and lows to be the same(or clipped) this creates issues[marshmellow] it also ignores the clock int Cmdaskdemod(const char *Cmd) { int i; @@ -79,7 +81,7 @@ int Cmdaskdemod(const char *Cmd) sscanf(Cmd, "%i", &c); /* Detect high and lows and clock */ - // (AL - clock???) + // (AL - clock???) for (i = 0; i < GraphTraceLen; ++i) { if (GraphBuffer[i] > high) @@ -87,11 +89,13 @@ int Cmdaskdemod(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; } - + //prime loop if (GraphBuffer[0] > 0) { GraphBuffer[0] = 1-c; } else { @@ -106,6 +110,7 @@ int Cmdaskdemod(const char *Cmd) * low for long periods, others just reach the peak and go * down) */ + //[marhsmellow] change == to >= for high and <= for low for fuzz if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) { GraphBuffer[i] = 1 - c; } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){ @@ -119,6 +124,250 @@ int Cmdaskdemod(const char *Cmd) return 0; } +//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) { + 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; +} +//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 +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); + printEM410x(id); + if (id>0) return 1; + return 0; +} + + +//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; + } + 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); + } + 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 (;ihigh) high=GraphBuffer[i]; + else if(GraphBuffer[i]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; ihigh)high=GraphBuffer[i]; + else if(GraphBuffer[i]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; + 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; + } + 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; + } + 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(); + + //output + 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) { static int CorrelBuffer[MAX_GRAPH_TRACE_LEN]; @@ -228,10 +477,10 @@ int CmdBitstream(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(); @@ -257,14 +506,188 @@ int CmdDec(const char *Cmd) } /* 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 +//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 + //set defaults + 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 + if (rfLen==1){ + invert=1; //if invert option only is used + rfLen = 50; + } 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 (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"); + } + return 0; +} + +//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 + 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 = 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++; + } + 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); + } + } + 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; + } return 0; } -int CmdFSKdemod(const char *Cmd) +//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 + 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; + } + //Index map + //0 10 20 30 40 50 60 + //| | | | | | | + //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23 + //----------------------------------------------------------------------------- + //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11 + // + //XSF(version)facility:codeone+codetwo (raw) + //Handle the data + 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 { static const int LowTone[] = { 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, @@ -284,12 +707,12 @@ int CmdFSKdemod(const char *Cmd) int lowLen = sizeof (LowTone) / sizeof (int); int highLen = sizeof (HighTone) / sizeof (int); - int convLen = (highLen > lowLen) ? highLen : lowLen; + int convLen = (highLen > lowLen) ? highLen : lowLen; //if highlen > lowLen then highlen else lowlen uint32_t hi = 0, lo = 0; int i, j; int minMark = 0, maxMark = 0; - + for (i = 0; i < GraphTraceLen - convLen; ++i) { int lowSum = 0, highSum = 0; @@ -321,7 +744,7 @@ int CmdFSKdemod(const char *Cmd) GraphTraceLen -= (convLen + 16); RepaintGraphWindow(); - // Find bit-sync (3 lo followed by 3 high) + // Find bit-sync (3 lo followed by 3 high) (HID ONLY) int max = 0, maxPos = 0; for (i = 0; i < 6000; ++i) { int dec = 0; @@ -463,7 +886,7 @@ int CmdSamples(const char *Cmd) uint8_t got[40000]; n = strtol(Cmd, NULL, 0); - if (n == 0) n = 512; + if (n == 0) n = 6000; if (n > sizeof(got)) n = sizeof(got); PrintAndLog("Reading %d samples\n", n); @@ -481,56 +904,24 @@ int CmdSamples(const char *Cmd) int CmdTuneSamples(const char *Cmd) { - int timeout = 0; - printf("\nMeasuring antenna characteristics, please wait..."); - - UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING}; - SendCommand(&c); - - UsbCommand resp; - while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) { - timeout++; - printf("."); - if (timeout > 7) { - PrintAndLog("\nNo response from Proxmark. Aborting..."); - return 1; - } - } - - int peakv, peakf; - int vLf125, vLf134, vHf; - vLf125 = resp.arg[0] & 0xffff; - vLf134 = resp.arg[0] >> 16; - vHf = resp.arg[1] & 0xffff;; - peakf = resp.arg[2] & 0xffff; - peakv = resp.arg[2] >> 16; - PrintAndLog(""); - PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0); - PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0); - PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1)); - PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0); - if (peakv<2000) - PrintAndLog("# Your LF antenna is unusable."); - else if (peakv<10000) - PrintAndLog("# Your LF antenna is marginal."); - if (vHf<2000) - PrintAndLog("# Your HF antenna is unusable."); - else if (vHf<5000) - PrintAndLog("# Your HF antenna is marginal."); - - for (int i = 0; i < 256; i++) { - GraphBuffer[i] = resp.d.asBytes[i] - 128; - } - - PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n"); - PrintAndLog("\n"); - GraphTraceLen = 256; - ShowGraphWindow(); + int cnt = 0; + int n = 255; + uint8_t got[255]; - return 0; + PrintAndLog("Reading %d samples\n", n); + GetFromBigBuf(got,n,7256); // armsrc/apps.h: #define FREE_BUFFER_OFFSET 7256 + WaitForResponse(CMD_ACK,NULL); + for (int j = 0; j < n; j++) { + GraphBuffer[cnt++] = ((int)got[j]) - 128; + } + + PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n"); + PrintAndLog("\n"); + GraphTraceLen = n; + RepaintGraphWindow(); + return 0; } - int CmdLoad(const char *Cmd) { FILE *f = fopen(Cmd, "r"); @@ -562,6 +953,15 @@ int CmdLtrim(const char *Cmd) 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 @@ -689,30 +1089,30 @@ int CmdManchesterDemod(const char *Cmd) { if (GraphBuffer[i-1] != GraphBuffer[i]) { - lc = i-lastval; - lastval = i; - - // Error check: if bitidx becomes too large, we do not - // have a Manchester encoded bitstream or the clock is really - // wrong! - if (bitidx > (GraphTraceLen*2/clock+8) ) { - PrintAndLog("Error: the clock you gave is probably wrong, aborting."); - return 0; - } - // Then switch depending on lc length: - // Tolerance is 1/4 of clock rate (arbitrary) - if (abs(lc-clock/2) < tolerance) { - // Short pulse : either "1" or "0" - BitStream[bitidx++]=GraphBuffer[i-1]; - } else if (abs(lc-clock) < tolerance) { - // Long pulse: either "11" or "00" - BitStream[bitidx++]=GraphBuffer[i-1]; - BitStream[bitidx++]=GraphBuffer[i-1]; - } else { + lc = i-lastval; + lastval = i; + + // Error check: if bitidx becomes too large, we do not + // have a Manchester encoded bitstream or the clock is really + // wrong! + if (bitidx > (GraphTraceLen*2/clock+8) ) { + PrintAndLog("Error: the clock you gave is probably wrong, aborting."); + return 0; + } + // Then switch depending on lc length: + // Tolerance is 1/4 of clock rate (arbitrary) + if (abs(lc-clock/2) < tolerance) { + // Short pulse : either "1" or "0" + BitStream[bitidx++]=GraphBuffer[i-1]; + } else if (abs(lc-clock) < tolerance) { + // Long pulse: either "11" or "00" + BitStream[bitidx++]=GraphBuffer[i-1]; + BitStream[bitidx++]=GraphBuffer[i-1]; + } else { // Error warnings++; - PrintAndLog("Warning: Manchester decode error for pulse width detection."); - PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)"); + PrintAndLog("Warning: Manchester decode error for pulse width detection."); + PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)"); if (warnings > 10) { @@ -729,15 +1129,15 @@ int CmdManchesterDemod(const char *Cmd) for (i = 0; i < bitidx; i += 2) { if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) { BitStream[bit2idx++] = 1 ^ invert; - } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) { - BitStream[bit2idx++] = 0 ^ invert; - } else { - // We cannot end up in this state, this means we are unsynchronized, - // move up 1 bit: - i++; + } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) { + BitStream[bit2idx++] = 0 ^ invert; + } else { + // We cannot end up in this state, this means we are unsynchronized, + // move up 1 bit: + i++; warnings++; - PrintAndLog("Unsynchronized, resync..."); - PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)"); + PrintAndLog("Unsynchronized, resync..."); + PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)"); if (warnings > 10) { @@ -940,20 +1340,28 @@ static command_t CommandTable[] = {"help", CmdHelp, 1, "This help"}, {"amp", CmdAmp, 1, "Amplify peaks"}, {"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"}, + {"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, " -- 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] [rchigh] [rclow] Demodulate graph window from FSK to binary (clock = 50)(invert = 1 or 0)(rchigh = 10)(rclow=8)"}, {"grid", CmdGrid, 1, " -- overlay grid on graph window, use zero value to turn off either"}, {"hexsamples", CmdHexsamples, 0, " [] -- Dump big buffer as hex bytes"}, {"hide", CmdHide, 1, "Hide graph window"}, {"hpf", CmdHpf, 1, "Remove DC offset from trace"}, {"load", CmdLoad, 1, " -- Load trace (to graph window"}, {"ltrim", CmdLtrim, 1, " -- Trim samples from left of trace"}, + {"rtrim", CmdRtrim, 1, " -- 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)"},