X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/bcec0edb9739afecf020cf0eb3aea3bd2793d38b..refs/heads/revert-371-comms-refactor:/client/cmddata.c?ds=sidebyside diff --git a/client/cmddata.c b/client/cmddata.c index de85b280..1f548284 100644 --- a/client/cmddata.c +++ b/client/cmddata.c @@ -22,16 +22,14 @@ #include "cmdparser.h"// already included in cmdmain.h #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h #include "lfdemod.h" // for demod code -#include "crc.h" // for pyramid checksum maxim -#include "crc16.h" // for FDXB demod checksum #include "loclass/cipherutils.h" // for decimating samples in getsamples #include "cmdlfem4x.h"// for em410x demod uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN]; uint8_t g_debugMode=0; size_t DemodBufferLen=0; -//size_t g_demodStartIdx=0; -//uint8_t g_demodClock=0; +int g_DemodStartIdx=0; +int g_DemodClock=0; static int CmdHelp(const char *Cmd); @@ -42,8 +40,8 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx) if (buff == NULL) return; - if ( size >= MAX_DEMOD_BUF_LEN) - size = MAX_DEMOD_BUF_LEN; + if ( size > MAX_DEMOD_BUF_LEN - startIdx) + size = MAX_DEMOD_BUF_LEN - startIdx; size_t i = 0; for (; i < size; i++){ @@ -53,6 +51,42 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx) return; } +bool getDemodBuf(uint8_t *buff, size_t *size) { + if (buff == NULL) return false; + if (size == NULL) return false; + if (*size == 0) return false; + + *size = (*size > DemodBufferLen) ? DemodBufferLen : *size; + + memcpy(buff, DemodBuffer, *size); + return true; +} + +// option '1' to save DemodBuffer any other to restore +void save_restoreDB(uint8_t saveOpt) +{ + static uint8_t SavedDB[MAX_DEMOD_BUF_LEN]; + static size_t SavedDBlen; + static bool DB_Saved = false; + static int savedDemodStartIdx = 0; + static int savedDemodClock = 0; + + if (saveOpt == GRAPH_SAVE) { //save + + memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer)); + SavedDBlen = DemodBufferLen; + DB_Saved=true; + savedDemodStartIdx = g_DemodStartIdx; + savedDemodClock = g_DemodClock; + } else if (DB_Saved) { //restore + memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer)); + DemodBufferLen = SavedDBlen; + g_DemodClock = savedDemodClock; + g_DemodStartIdx = savedDemodStartIdx; + } + return; +} + int CmdSetDebugMode(const char *Cmd) { int demod=0; @@ -195,15 +229,21 @@ int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, } bool st = false; size_t ststart = 0, stend = 0; - if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend); + if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend); + *stCheck = st; if (st) { - *stCheck = st; clk = (clk == 0) ? foundclk : clk; CursorCPos = ststart; CursorDPos = stend; if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers"); - } - int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType); + //Graph ST trim (for testing) + //for (int i = 0; i < BitLen; i++) { + // GraphBuffer[i] = BitStream[i]-128; + //} + //RepaintGraphWindow(); + } + int startIdx = 0; + int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx); if (errCnt<0 || BitLen<16){ //if fatal error (or -1) if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk); return 0; @@ -213,9 +253,10 @@ int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, return 0; } if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen); - //output setDemodBuf(BitStream,BitLen,0); + setClockGrid(clk, startIdx); + if (verbose || g_debugMode){ if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt); if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk); @@ -261,11 +302,11 @@ int Cmdaskmandemod(const char *Cmd) } bool st = true; if (Cmd[0]=='s') - return ASKDemod_ext(Cmd++, true, true, 1, &st); + return ASKDemod_ext(Cmd++, true, false, 1, &st); else if (Cmd[1] == 's') - return ASKDemod_ext(Cmd+=2, true, true, 1, &st); + return ASKDemod_ext(Cmd+=2, true, false, 1, &st); else - return ASKDemod(Cmd, true, true, 1); + return ASKDemod(Cmd, true, false, 1); } //by marshmellow @@ -290,7 +331,7 @@ int Cmdmandecoderaw(const char *Cmd) return 0; } if (DemodBufferLen==0) return 0; - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; + uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0}; int high=0,low=0; for (;ihigh) high=DemodBuffer[i]; @@ -352,14 +393,14 @@ int CmdBiphaseDecodeRaw(const char *Cmd) return 0; } sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr); - if (DemodBufferLen==0){ + if (DemodBufferLen==0) { PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first"); return 0; } - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - memcpy(BitStream, DemodBuffer, DemodBufferLen); - size = DemodBufferLen; - errCnt=BiphaseRawDecode(BitStream, &size, offset, invert); + uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0}; + size = sizeof(BitStream); + if ( !getDemodBuf(BitStream, &size) ) return 0; + errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert); if (errCnt<0){ PrintAndLog("Error during decode:%d", errCnt); return 0; @@ -372,10 +413,12 @@ int CmdBiphaseDecodeRaw(const char *Cmd) if (errCnt>0){ PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt); } + PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert); PrintAndLog("%s", sprint_bin_break(BitStream, size, 16)); if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod + setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2); return 1; } @@ -387,27 +430,29 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose) int offset=0, clk=0, invert=0, maxErr=0; sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr); - uint8_t BitStream[MAX_DEMOD_BUF_LEN]; - size_t size = getFromGraphBuf(BitStream); + uint8_t BitStream[MAX_GRAPH_TRACE_LEN]; + size_t size = getFromGraphBuf(BitStream); + int startIdx = 0; //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer - int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0); + int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx); if ( errCnt < 0 || errCnt > maxErr ) { if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk); return 0; - } + } //attempt to Biphase decode BitStream - errCnt = BiphaseRawDecode(BitStream, &size, offset, invert); + errCnt = BiphaseRawDecode(BitStream, &size, &offset, invert); if (errCnt < 0){ if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt); return 0; - } + } if (errCnt > maxErr) { if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt); return 0; } //success set DemodBuffer and return setDemodBuf(BitStream, size, 0); + setClockGrid(clk, startIdx + clk*offset/2); if (g_debugMode || verbose){ PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt); printDemodBuff(); @@ -444,99 +489,6 @@ int Cmdaskbiphdemod(const char *Cmd) return ASKbiphaseDemod(Cmd, true); } -//could be split to a gProxII file -//by marshmellow -//attempts to demodulate and identify a G_Prox_II verex/chubb card -//WARNING: if it fails during some points it will destroy the DemodBuffer data -// but will leave the GraphBuffer intact. -//if successful it will push askraw data back to demod buffer ready for emulation -int CmdG_Prox_II_Demod(const char *Cmd) -{ - if (!ASKbiphaseDemod(Cmd, false)){ - if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try"); - return 0; - } - size_t size = DemodBufferLen; - //call lfdemod.c demod for gProxII - int ans = gProxII_Demod(DemodBuffer, &size); - if (ans < 0){ - if (g_debugMode) PrintAndLog("Error gProxII_Demod"); - return 0; - } - //got a good demod of 96 bits - uint8_t ByteStream[8] = {0x00}; - uint8_t xorKey=0; - size_t startIdx = ans + 6; //start after 6 bit preamble - - uint8_t bits_no_spacer[90]; - //so as to not mess with raw DemodBuffer copy to a new sample array - memcpy(bits_no_spacer, DemodBuffer + startIdx, 90); - // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72)) - size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run - if (bitLen != 72) { - if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx); - return 0; - } - // get key and then get all 8 bytes of payload decoded - xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8); - for (size_t idx = 0; idx < 8; idx++) { - ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey; - if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]); - } - //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data - // - uint8_t fmtLen = ByteStream[0]>>2; - uint32_t FC = 0; - uint32_t Card = 0; - //get raw 96 bits to print - uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32); - uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32); - uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32); - - if (fmtLen==36){ - FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1); - Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5); - PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card); - } else if(fmtLen==26){ - FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7); - Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7); - PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card); - } else { - PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen); - PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8)); - } - PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3); - setDemodBuf(DemodBuffer+ans, 96, 0); - return 1; -} - -//could be moved to a viking file -//by marshmellow -//see ASKDemod for what args are accepted -int CmdVikingDemod(const char *Cmd) -{ - if (!ASKDemod(Cmd, false, false, 1)) { - if (g_debugMode) PrintAndLog("ASKDemod failed"); - return 0; - } - size_t size = DemodBufferLen; - //call lfdemod.c demod for Viking - int ans = VikingDemod_AM(DemodBuffer, &size); - if (ans < 0) { - if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans); - return 0; - } - //got a good demod - uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32); - uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32); - uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32); - uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8); - PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum); - PrintAndLog("Raw: %08X%08X", raw1,raw2); - setDemodBuf(DemodBuffer+ans, 64, 0); - return 1; -} - //by marshmellow - see ASKDemod int Cmdaskrawdemod(const char *Cmd) { @@ -561,45 +513,44 @@ int Cmdaskrawdemod(const char *Cmd) return ASKDemod(Cmd, true, false, 0); } -int AutoCorrelate(int window, bool SaveGrph, bool verbose) +int AutoCorrelate(const int *in, int *out, size_t len, int window, bool SaveGrph, bool verbose) { static int CorrelBuffer[MAX_GRAPH_TRACE_LEN]; size_t Correlation = 0; int maxSum = 0; int lastMax = 0; if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window); - for (int i = 0; i < GraphTraceLen - window; ++i) { + for (int i = 0; i < len - window; ++i) { int sum = 0; for (int j = 0; j < window; ++j) { - sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256; + sum += (in[j]*in[i + j]) / 256; } CorrelBuffer[i] = sum; - if (sum >= maxSum-100 && sum <= maxSum+100){ + if (sum >= maxSum-100 && sum <= maxSum+100) { //another max Correlation = i-lastMax; lastMax = i; if (sum > maxSum) maxSum = sum; - } else if (sum > maxSum){ + } else if (sum > maxSum) { maxSum=sum; lastMax = i; } } - if (Correlation==0){ + if (Correlation==0) { //try again with wider margin - for (int i = 0; i < GraphTraceLen - window; i++){ - if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){ + for (int i = 0; i < len - window; i++) { + if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)) { //another max Correlation = i-lastMax; lastMax = i; - //if (CorrelBuffer[i] > maxSum) maxSum = sum; } } } if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation); - if (SaveGrph){ - GraphTraceLen = GraphTraceLen - window; - memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int)); + if (SaveGrph) { + //GraphTraceLen = GraphTraceLen - window; + memcpy(out, CorrelBuffer, len * sizeof(int)); RepaintGraphWindow(); } return Correlation; @@ -632,7 +583,7 @@ int CmdAutoCorr(const char *Cmd) return 0; } if (grph == 'g') updateGrph=true; - return AutoCorrelate(window, updateGrph, true); + return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true); } int CmdBitsamples(const char *Cmd) @@ -735,6 +686,18 @@ int CmdGraphShiftZero(const char *Cmd) return 0; } +int AskEdgeDetect(const int *in, int *out, int len, int threshold) { + int Last = 0; + for(int i = 1; i= threshold) //large jump up + Last = 127; + else if(in[i]-in[i-1] <= -1 * threshold) //large jump down + Last = -127; + out[i-1] = Last; + } + return 0; +} + //by marshmellow //use large jumps in read samples to identify edges of waves and then amplify that wave to max //similar to dirtheshold, threshold commands @@ -742,18 +705,12 @@ int CmdGraphShiftZero(const char *Cmd) int CmdAskEdgeDetect(const char *Cmd) { int thresLen = 25; - int Last = 0; + int ans = 0; sscanf(Cmd, "%i", &thresLen); - for(int i = 1; i=thresLen) //large jump up - Last = 127; - else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down - Last = -127; - GraphBuffer[i-1] = Last; - } + ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen); RepaintGraphWindow(); - return 0; + return ans; } /* Print our clock rate */ @@ -847,14 +804,17 @@ int FSKrawDemod(const char *Cmd, bool verbose) } //get bit clock length if (!rfLen) { - rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow); + int firstClockEdge = 0; //todo - align grid on graph with this... + rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge); if (!rfLen) rfLen = 50; } - int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow); + int startIdx = 0; + int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx); if (size > 0) { setDemodBuf(BitStream,size,0); + setClockGrid(rfLen, startIdx); - // Now output the bitstream to the scrollback by line of 16 bits + // Now output the bitstream to the scrollback by line of 16 bits if (verbose || g_debugMode) { PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow); PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert)); @@ -894,374 +854,6 @@ int CmdFSKrawdemod(const char *Cmd) return FSKrawDemod(Cmd, true); } -//by marshmellow -//Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded) -//print full Paradox Prox ID and some bit format details if found -int CmdFSKdemodParadox(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}; - size_t BitLen = getFromGraphBuf(BitStream); - if (BitLen==0) return 0; - //get binary from fsk wave - int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo); - if (idx<0){ - if (g_debugMode){ - if (idx==-1){ - PrintAndLog("DEBUG: Just Noise Detected"); - } else if (idx == -2) { - PrintAndLog("DEBUG: Error demoding fsk"); - } else if (idx == -3) { - PrintAndLog("DEBUG: Preamble not found"); - } else if (idx == -4) { - PrintAndLog("DEBUG: Error in Manchester data"); - } else { - PrintAndLog("DEBUG: Error demoding fsk %d", idx); - } - } - return 0; - } - if (hi2==0 && hi==0 && lo==0){ - if (g_debugMode) PrintAndLog("DEBUG: Error - no value found"); - return 0; - } - uint32_t fc = ((hi & 0x3)<<6) | (lo>>26); - uint32_t cardnum = (lo>>10)&0xFFFF; - uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32); - uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32); - uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32); - - PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x", - hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo); - setDemodBuf(BitStream,BitLen,idx); - if (g_debugMode){ - PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen); - printDemodBuff(); - } - return 1; -} - -//by marshmellow -//IO-Prox demod - FSK RF/64 with preamble of 000000001 -//print ioprox ID and some format details -int CmdFSKdemodIO(const char *Cmd) -{ - int idx=0; - //something in graphbuffer? - if (GraphTraceLen < 65) { - if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer"); - return 0; - } - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - size_t BitLen = getFromGraphBuf(BitStream); - if (BitLen==0) return 0; - - //get binary from fsk wave - idx = IOdemodFSK(BitStream,BitLen); - if (idx<0){ - if (g_debugMode){ - if (idx==-1){ - PrintAndLog("DEBUG: Just Noise Detected"); - } else if (idx == -2) { - PrintAndLog("DEBUG: not enough samples"); - } else if (idx == -3) { - PrintAndLog("DEBUG: error during fskdemod"); - } else if (idx == -4) { - PrintAndLog("DEBUG: Preamble not found"); - } else if (idx == -5) { - PrintAndLog("DEBUG: Separator bits not found"); - } else { - PrintAndLog("DEBUG: Error demoding fsk %d", idx); - } - } - return 0; - } - if (idx==0){ - if (g_debugMode){ - PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen); - if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16)); - } - 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) { - if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",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 - uint8_t crc = bytebits_to_byte(BitStream+idx+54,8); - uint16_t calccrc = 0; - - for (uint8_t i=1; i<6; ++i){ - calccrc += bytebits_to_byte(BitStream+idx+9*i,8); - } - calccrc &= 0xff; - calccrc = 0xff - calccrc; - - char *crcStr = (crc == calccrc) ? "crc ok": "!crc"; - - PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr); - setDemodBuf(BitStream,64,idx); - if (g_debugMode){ - PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64); - printDemodBuff(); - } - return 1; -} - -//by marshmellow -//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream) -//print full Farpointe Data/Pyramid Prox ID and some bit format details if found -int CmdFSKdemodPyramid(const char *Cmd) -{ - //raw fsk demod no manchester decoding no start bit finding just get binary from wave - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - size_t size = getFromGraphBuf(BitStream); - if (size==0) return 0; - - //get binary from fsk wave - int idx = PyramiddemodFSK(BitStream, &size); - if (idx < 0){ - if (g_debugMode){ - if (idx == -5) - PrintAndLog("DEBUG: Error - not enough samples"); - else if (idx == -1) - PrintAndLog("DEBUG: Error - only noise found"); - else if (idx == -2) - PrintAndLog("DEBUG: Error - problem during FSK demod"); - else if (idx == -3) - PrintAndLog("DEBUG: Error - Size not correct: %d", size); - else if (idx == -4) - PrintAndLog("DEBUG: Error - Pyramid preamble not found"); - else - PrintAndLog("DEBUG: Error - idx: %d",idx); - } - return 0; - } - // Index map - // 0 10 20 30 40 50 60 - // | | | | | | | - // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 - // ----------------------------------------------------------------------------- - // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 - // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o - - // 64 70 80 90 100 110 120 - // | | | | | | | - // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 - // ----------------------------------------------------------------------------- - // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0 - // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o - // |---115---||---------71---------| - // s = format start bit, o = odd parity of last 7 bits - // f = facility code, c = card number - // w = wiegand parity, x = extra space for other formats - // p = unknown checksum - // (26 bit format shown) - - //get bytes for checksum calc - uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8); - uint8_t csBuff[14] = {0x00}; - for (uint8_t i = 0; i < 13; i++){ - csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8); - } - //check checksum calc - //checksum calc thanks to ICEMAN!! - uint32_t checkCS = CRC8Maxim(csBuff,13); - - //get raw ID before removing parities - uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32); - uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32); - uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32); - uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32); - setDemodBuf(BitStream,128,idx); - - size = removeParity(BitStream, idx+8, 8, 1, 120); - if (size != 105){ - if (g_debugMode) - PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3); - return 0; - } - - // ok valid card found! - - // Index map - // 0 10 20 30 40 50 60 70 - // | | | | | | | | - // 01234567890123456789012345678901234567890123456789012345678901234567890 - // ----------------------------------------------------------------------- - // 00000000000000000000000000000000000000000000000000000000000000000000000 - // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx - - // 71 80 90 100 - // | | | | - // 1 2 34567890 1234567890123456 7 8901234 - // --------------------------------------- - // 1 1 01110011 0000000001000110 0 1001010 - // s w ffffffff cccccccccccccccc w ppppppp - // |--115-| |------71------| - // s = format start bit, o = odd parity of last 7 bits - // f = facility code, c = card number - // w = wiegand parity, x = extra space for other formats - // p = unknown checksum - // (26 bit format shown) - - //find start bit to get fmtLen - int j; - for (j=0; j32){ - //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32); - //code2 = bytebits_to_byte(BitStream+(size-32),32); - PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); - } else{ - //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen); - PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); - } - } - if (checksum == checkCS) - PrintAndLog("Checksum %02x passed", checksum); - else - PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS); - - if (g_debugMode){ - PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128); - printDemodBuff(); - } - return 1; -} - -// FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits) -// 8 databits + 1 parity (1) -// CIITT 16 chksum -// NATIONAL CODE, ICAR database -// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf -// FLAG (animal/non-animal) -/* -38 IDbits -10 country code -1 extra app bit -14 reserved bits -1 animal bit -16 ccitt CRC chksum over 64bit ID CODE. -24 appli bits. - --- sample: 985121004515220 [ 37FF65B88EF94 ] -*/ -int CmdFDXBdemodBI(const char *Cmd){ - - int invert = 1; - int clk = 32; - int errCnt = 0; - int maxErr = 0; - uint8_t BitStream[MAX_DEMOD_BUF_LEN]; - size_t size = getFromGraphBuf(BitStream); - - errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0); - if ( errCnt < 0 || errCnt > maxErr ) { - if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk); - return 0; - } - - errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1); - if (errCnt < 0 || errCnt > maxErr ) { - if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt); - return 0; - } - - int preambleIndex = FDXBdemodBI(BitStream, &size); - if (preambleIndex < 0){ - if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex); - return 0; - } - if (size != 128) { - if (g_debugMode) PrintAndLog("Error incorrect data length found"); - return 0; - } - - setDemodBuf(BitStream, 128, preambleIndex); - - // remove marker bits (1's every 9th digit after preamble) (pType = 2) - size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117); - if ( size != 104 ) { - if (g_debugMode) PrintAndLog("Error removeParity:: %d", size); - return 0; - } - if (g_debugMode) { - char *bin = sprint_bin_break(BitStream,size,16); - PrintAndLog("DEBUG BinStream:\n%s",bin); - } - PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:"); - if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size); - - //got a good demod - uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32); - uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10); - uint8_t dataBlockBit = BitStream[48]; - uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14); - uint8_t animalBit = BitStream[63]; - uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16); - uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24); - - uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32); - uint8_t raw[8]; - num_to_bytes(rawid, 8, raw); - - if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8)); - - uint16_t calcCrc = crc16_ccitt_kermit(raw, 8); - PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode); - PrintAndLog("National Code: %012" PRIu64, NationalCode); - PrintAndLog("CountryCode: %04u", countryCode); - PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False"); - PrintAndLog("reserved Code: %u", reservedCode); - PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False"); - PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed"); - PrintAndLog("Extended: 0x%X\n", extended); - - return 1; -} - - //by marshmellow //attempt to psk1 demod graph buffer int PSKDemod(const char *Cmd, bool verbose) @@ -1281,16 +873,9 @@ int PSKDemod(const char *Cmd, bool verbose) uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; size_t BitLen = getFromGraphBuf(BitStream); if (BitLen==0) return 0; - uint8_t carrier=countFC(BitStream, BitLen, 0); - if (carrier!=2 && carrier!=4 && carrier!=8){ - //invalid carrier - return 0; - } - if (g_debugMode){ - PrintAndLog("Carrier: rf/%d",carrier); - } int errCnt=0; - errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert); + int startIdx = 0; + errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx); if (errCnt > maxErr){ if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt); return 0; @@ -1307,98 +892,8 @@ int PSKDemod(const char *Cmd, bool verbose) } //prime demod buffer for output setDemodBuf(BitStream,BitLen,0); - return 1; -} + setClockGrid(clk, startIdx); -// Indala 26 bit decode -// by marshmellow -// optional arguments - same as CmdpskNRZrawDemod (clock & invert) -int CmdIndalaDecode(const char *Cmd) -{ - int ans; - if (strlen(Cmd)>0){ - ans = PSKDemod(Cmd, 0); - } else{ //default to RF/32 - ans = PSKDemod("32", 0); - } - - if (!ans){ - if (g_debugMode) - PrintAndLog("Error1: %d",ans); - return 0; - } - uint8_t invert=0; - size_t size = DemodBufferLen; - int startIdx = indala26decode(DemodBuffer, &size, &invert); - if (startIdx < 0 || size > 224) { - if (g_debugMode) - PrintAndLog("Error2: %d",ans); - return -1; - } - setDemodBuf(DemodBuffer, size, (size_t)startIdx); - if (invert) - if (g_debugMode) - PrintAndLog("Had to invert bits"); - - PrintAndLog("BitLen: %d",DemodBufferLen); - //convert UID to HEX - uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7; - uid1=bytebits_to_byte(DemodBuffer,32); - uid2=bytebits_to_byte(DemodBuffer+32,32); - if (DemodBufferLen==64) { - PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2); - } else { - uid3=bytebits_to_byte(DemodBuffer+64,32); - uid4=bytebits_to_byte(DemodBuffer+96,32); - uid5=bytebits_to_byte(DemodBuffer+128,32); - uid6=bytebits_to_byte(DemodBuffer+160,32); - uid7=bytebits_to_byte(DemodBuffer+192,32); - PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", - sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7); - } - if (g_debugMode){ - PrintAndLog("DEBUG: printing demodbuffer:"); - printDemodBuff(); - } - return 1; -} - -int CmdPSKNexWatch(const char *Cmd) -{ - if (!PSKDemod("", false)) return 0; - uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; - size_t startIdx = 0, size = DemodBufferLen; - bool invert = false; - if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){ - // if didn't find preamble try again inverting - if (!PSKDemod("1", false)) return 0; - size = DemodBufferLen; - if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0; - invert = true; - } - if (size != 128) return 0; - setDemodBuf(DemodBuffer, size, startIdx+4); - startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0) - //get ID - uint32_t ID = 0; - for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){ - for (uint8_t idx=0; idx<8; idx++){ - ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)]; - } - } - //parity check (TBD) - - //checksum check (TBD) - - //output - PrintAndLog("NexWatch ID: %d", ID); - if (invert){ - PrintAndLog("Had to Invert - probably NexKey"); - for (uint8_t idx=0; idx0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt); if (verbose || g_debugMode) { @@ -1575,6 +1072,30 @@ int CmdRawDemod(const char *Cmd) return ans; } +void setClockGrid(int clk, int offset) { + g_DemodStartIdx = offset; + g_DemodClock = clk; + if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk); + + if (offset > clk) offset %= clk; + if (offset < 0) offset += clk; + + if (offset > GraphTraceLen || offset < 0) return; + if (clk < 8 || clk > GraphTraceLen) { + GridLocked = false; + GridOffset = 0; + PlotGridX = 0; + PlotGridXdefault = 0; + RepaintGraphWindow(); + } else { + GridLocked = true; + GridOffset = offset; + PlotGridX = clk; + PlotGridXdefault = clk; + RepaintGraphWindow(); + } +} + int CmdGrid(const char *Cmd) { sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY); @@ -1666,7 +1187,7 @@ uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b) return val; } -int getSamples(const char *Cmd, bool silent) +int getSamples(int n, bool silent) { //If we get all but the last byte in bigbuf, // we don't have to worry about remaining trash @@ -1675,14 +1196,12 @@ int getSamples(const char *Cmd, bool silent) uint8_t got[BIGBUF_SIZE-1] = { 0 }; - int n = strtol(Cmd, NULL, 0); - if (n == 0 || n > sizeof(got)) n = sizeof(got); - PrintAndLog("Reading %d bytes from device memory\n", n); + if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n); GetFromBigBuf(got,n,0); - PrintAndLog("Data fetched"); + if (!silent) PrintAndLog("Data fetched"); UsbCommand response; WaitForResponse(CMD_ACK, &response); uint8_t bits_per_sample = 8; @@ -1691,13 +1210,13 @@ int getSamples(const char *Cmd, bool silent) if(response.arg[0] > 0) { sample_config *sc = (sample_config *) response.d.asBytes; - PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample + if (!silent) PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample , sc->decimation); bits_per_sample = sc->bits_per_sample; } if(bits_per_sample < 8) { - PrintAndLog("Unpacking..."); + if (!silent) PrintAndLog("Unpacking..."); BitstreamIn bout = { got, bits_per_sample * n, 0}; int j =0; for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) { @@ -1714,13 +1233,16 @@ int getSamples(const char *Cmd, bool silent) GraphTraceLen = n; } + setClockGrid(0,0); + DemodBufferLen = 0; RepaintGraphWindow(); return 0; } int CmdSamples(const char *Cmd) { - return getSamples(Cmd, false); + int n = strtol(Cmd, NULL, 0); + return getSamples(n, false); } int CmdTuneSamples(const char *Cmd) @@ -1816,6 +1338,8 @@ int CmdLoad(const char *Cmd) } fclose(f); PrintAndLog("loaded %d samples", GraphTraceLen); + setClockGrid(0,0); + DemodBufferLen = 0; RepaintGraphWindow(); return 0; } @@ -1851,9 +1375,9 @@ int CmdMtrim(const char *Cmd) { if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0; start++; //leave start position sample - GraphTraceLen -= stop - start; + GraphTraceLen = stop - start; for (int i = 0; i < GraphTraceLen; i++) { - GraphBuffer[start+i] = GraphBuffer[stop+i]; + GraphBuffer[i] = GraphBuffer[start+i]; } return 0; } @@ -1873,8 +1397,7 @@ int CmdNorm(const char *Cmd) if (max != min) { for (i = 0; i < GraphTraceLen; ++i) { - GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 / - (max - min); + GraphBuffer[i] = ((long)(GraphBuffer[i] - ((max + min) / 2)) * 256) / (max - min); //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work } } @@ -1923,37 +1446,42 @@ int CmdScale(const char *Cmd) return 0; } -int CmdDirectionalThreshold(const char *Cmd) +int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down) { - int8_t upThres = param_get8(Cmd, 0); - int8_t downThres = param_get8(Cmd, 1); - - printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres); - - int lastValue = GraphBuffer[0]; - GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in. + int lastValue = in[0]; + out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in. - for (int i = 1; i < GraphTraceLen; ++i) { + for (int i = 1; i < len; ++i) { // Apply first threshold to samples heading up - if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue) + if (in[i] >= up && in[i] > lastValue) { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = 127; + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = 1; } // Apply second threshold to samples heading down - else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue) + else if (in[i] <= down && in[i] < lastValue) { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = -127; + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = -1; } else { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = GraphBuffer[i-1]; - + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = out[i-1]; } } - GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample. + out[0] = out[1]; // Align with first edited sample. + return 0; +} + +int CmdDirectionalThreshold(const char *Cmd) +{ + int8_t upThres = param_get8(Cmd, 0); + int8_t downThres = param_get8(Cmd, 1); + + printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres); + + directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres); RepaintGraphWindow(); return 0; } @@ -2079,12 +1607,209 @@ int Cmdhex2bin(const char *Cmd) return 0; } + /* // example of FSK2 RF/50 Tones + static const int LowTone[] = { + 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, + 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, + 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, + 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, + 1, 1, 1, 1, 1, -1, -1, -1, -1, -1 + }; + static const int HighTone[] = { + 1, 1, 1, 1, 1, -1, -1, -1, -1, // note one extra 1 to padd due to 50/8 remainder (1/2 the remainder) + 1, 1, 1, 1, -1, -1, -1, -1, + 1, 1, 1, 1, -1, -1, -1, -1, + 1, 1, 1, 1, -1, -1, -1, -1, + 1, 1, 1, 1, -1, -1, -1, -1, + 1, 1, 1, 1, -1, -1, -1, -1, -1, // note one extra -1 to padd due to 50/8 remainder + }; + */ +void GetHiLoTone(int *LowTone, int *HighTone, int clk, int LowToneFC, int HighToneFC) { + int i,j=0; + int Left_Modifier = ((clk % LowToneFC) % 2) + ((clk % LowToneFC)/2); + int Right_Modifier = (clk % LowToneFC) / 2; + //int HighToneMod = clk mod HighToneFC; + int LeftHalfFCCnt = (LowToneFC % 2) + (LowToneFC/2); //truncate + int FCs_per_clk = clk/LowToneFC; + + // need to correctly split up the clock to field clocks. + // First attempt uses modifiers on each end to make up for when FCs don't evenly divide into Clk + + // start with LowTone + // set extra 1 modifiers to make up for when FC doesn't divide evenly into Clk + for (i = 0; i < Left_Modifier; i++) { + LowTone[i] = 1; + } + + // loop # of field clocks inside the main clock + for (i = 0; i < (FCs_per_clk); i++) { + // loop # of samples per field clock + for (j = 0; j < LowToneFC; j++) { + LowTone[(i*LowToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1; + } + } + + int k; + // add last -1 modifiers + for (k = 0; k < Right_Modifier; k++) { + LowTone[((i-1)*LowToneFC)+Left_Modifier+j+k] = -1; + } + + // now do hightone + Left_Modifier = ((clk % HighToneFC) % 2) + ((clk % HighToneFC)/2); + Right_Modifier = (clk % HighToneFC) / 2; + LeftHalfFCCnt = (HighToneFC % 2) + (HighToneFC/2); //truncate + FCs_per_clk = clk/HighToneFC; + + for (i = 0; i < Left_Modifier; i++) { + HighTone[i] = 1; + } + + // loop # of field clocks inside the main clock + for (i = 0; i < (FCs_per_clk); i++) { + // loop # of samples per field clock + for (j = 0; j < HighToneFC; j++) { + HighTone[(i*HighToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1; + } + } + + // add last -1 modifiers + for (k = 0; k < Right_Modifier; k++) { + PrintAndLog("(i-1)*HighToneFC+lm+j+k %i",((i-1)*HighToneFC)+Left_Modifier+j+k); + HighTone[((i-1)*HighToneFC)+Left_Modifier+j+k] = -1; + } + if (g_debugMode == 2) { + for ( i = 0; i < clk; i++) { + PrintAndLog("Low: %i, High: %i",LowTone[i],HighTone[i]); + } + } +} + +//old CmdFSKdemod adapted by marshmellow +//converts FSK to clear NRZ style wave. (or demodulates) +int FSKToNRZ(int *data, int *dataLen, int clk, int LowToneFC, int HighToneFC) { + uint8_t ans=0; + if (clk == 0 || LowToneFC == 0 || HighToneFC == 0) { + int firstClockEdge=0; + ans = fskClocks((uint8_t *) &LowToneFC, (uint8_t *) &HighToneFC, (uint8_t *) &clk, false, &firstClockEdge); + if (g_debugMode > 1) { + PrintAndLog ("DEBUG FSKtoNRZ: detected clocks: fc_low %i, fc_high %i, clk %i, firstClockEdge %i, ans %u", LowToneFC, HighToneFC, clk, firstClockEdge, ans); + } + } + // currently only know fsk modulations with field clocks < 10 samples and > 4 samples. filter out to remove false positives (and possibly destroying ask/psk modulated waves...) + if (ans == 0 || clk == 0 || LowToneFC == 0 || HighToneFC == 0 || LowToneFC > 10 || HighToneFC < 4) { + if (g_debugMode > 1) { + PrintAndLog ("DEBUG FSKtoNRZ: no fsk clocks found"); + } + return 0; + } + int LowTone[clk]; + int HighTone[clk]; + GetHiLoTone(LowTone, HighTone, clk, LowToneFC, HighToneFC); + + int i, j; + + // loop through ([all samples] - clk) + for (i = 0; i < *dataLen - clk; ++i) { + int lowSum = 0, highSum = 0; + + // sum all samples together starting from this sample for [clk] samples for each tone (multiply tone value with sample data) + for (j = 0; j < clk; ++j) { + lowSum += LowTone[j] * data[i+j]; + highSum += HighTone[j] * data[i + j]; + } + // get abs( [average sample value per clk] * 100 ) (or a rolling average of sorts) + lowSum = abs(100 * lowSum / clk); + highSum = abs(100 * highSum / clk); + // save these back to buffer for later use + data[i] = (highSum << 16) | lowSum; + } + + // now we have the abs( [average sample value per clk] * 100 ) for each tone + // loop through again [all samples] - clk - 16 + // note why 16??? is 16 the largest FC? changed to LowToneFC as that should be the > fc + for(i = 0; i < *dataLen - clk - LowToneFC; ++i) { + int lowTot = 0, highTot = 0; + + // sum a field clock width of abs( [average sample values per clk] * 100) for each tone + for (j = 0; j < LowToneFC; ++j) { //10 for fsk2 + lowTot += (data[i + j] & 0xffff); + } + for (j = 0; j < HighToneFC; j++) { //8 for fsk2 + highTot += (data[i + j] >> 16); + } + + // subtract the sum of lowTone averages by the sum of highTone averages as it + // and write back the new graph value + data[i] = lowTot - highTot; + } + // update dataLen to what we put back to the data sample buffer + *dataLen -= (clk + LowToneFC); + return 0; +} + +int usage_data_fsktonrz() { + PrintAndLog("Usage: data fsktonrz c l f "); + PrintAndLog("Options: "); + PrintAndLog(" h This help"); + PrintAndLog(" c enter the a clock (omit to autodetect)"); + PrintAndLog(" l enter a field clock (omit to autodetect)"); + PrintAndLog(" f enter a field clock (omit to autodetect)"); + return 0; +} + +int CmdFSKToNRZ(const char *Cmd) { + // take clk, fc_low, fc_high + // blank = auto; + bool errors = false; + int clk = 0; + char cmdp = 0; + int fc_low = 10, fc_high = 8; + while(param_getchar(Cmd, cmdp) != 0x00) + { + switch(param_getchar(Cmd, cmdp)) + { + case 'h': + case 'H': + return usage_data_fsktonrz(); + case 'C': + case 'c': + clk = param_get32ex(Cmd, cmdp+1, 0, 10); + cmdp += 2; + break; + case 'F': + case 'f': + fc_high = param_get32ex(Cmd, cmdp+1, 0, 10); + cmdp += 2; + break; + case 'L': + case 'l': + fc_low = param_get32ex(Cmd, cmdp+1, 0, 10); + cmdp += 2; + break; + default: + PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp)); + errors = true; + break; + } + if(errors) break; + } + //Validations + if(errors) return usage_data_fsktonrz(); + + setClockGrid(0,0); + DemodBufferLen = 0; + int ans = FSKToNRZ(GraphBuffer, &GraphTraceLen, clk, fc_low, fc_high); + CmdNorm(""); + RepaintGraphWindow(); + return ans; +} + + static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"}, - {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"}, - {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"}, {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"}, {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"}, {"bin2hex", Cmdbin2hex, 1, "bin2hex -- Converts binary to hexadecimal"}, @@ -2092,11 +1817,7 @@ static command_t CommandTable[] = {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"}, {"dec", CmdDec, 1, "Decimate samples"}, {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"}, - {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"}, - //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"}, - {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"}, - {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"}, - {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"}, + {"fsktonrz", CmdFSKToNRZ, 1, "Convert fsk2 to nrz wave for alternate fsk demodulating (for weak fsk)"}, {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"}, {"grid", CmdGrid, 1, " -- overlay grid on graph window, use zero value to turn off either"}, {"hexsamples", CmdHexsamples, 0, " [] -- Dump big buffer as hex bytes"}, @@ -2111,8 +1832,6 @@ static command_t CommandTable[] = {"norm", CmdNorm, 1, "Normalize max/min to +/-128"}, {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"}, {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] [l] -- print the data in the DemodBuffer - 'x' for hex output"}, - {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"}, - {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"}, {"rawdemod", CmdRawDemod, 1, "[modulation] ... -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"}, {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"}, {"save", CmdSave, 1, " -- Save trace (from graph window)"},