X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3aa4014baa5da711770ed37660f38149f8b4ddb0..d372569b45b7ce862d2ed2db192eead861806251:/client/cmddata.c diff --git a/client/cmddata.c b/client/cmddata.c index 657a118b..1f548284 100644 --- a/client/cmddata.c +++ b/client/cmddata.c @@ -8,284 +8,305 @@ // Data and Graph commands //----------------------------------------------------------------------------- -#include -#include -#include -#include -#include "proxmark3.h" -#include "data.h" -#include "ui.h" -#include "graph.h" -#include "cmdparser.h" +#include // also included in util.h +#include // also included in util.h +#include +#include // for CmdNorm INT_MIN && INT_MAX +#include "data.h" // also included in util.h +#include "cmddata.h" #include "util.h" #include "cmdmain.h" -#include "cmddata.h" -#include "lfdemod.h" +#include "proxmark3.h" +#include "ui.h" // for show graph controls +#include "graph.h" // for graph data +#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 "loclass/cipherutils.h" // for decimating samples in getsamples +#include "cmdlfem4x.h"// for em410x demod + uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN]; -int DemodBufferLen; +uint8_t g_debugMode=0; +size_t DemodBufferLen=0; +int g_DemodStartIdx=0; +int g_DemodClock=0; + static int CmdHelp(const char *Cmd); //set the demod buffer with given array of binary (one bit per byte) //by marshmellow -void setDemodBuf(uint8_t *buff,int size) -{ - int i=0; - for (; i < size; ++i){ - DemodBuffer[i]=buff[i]; - } - DemodBufferLen=size; - return; -} - -//by marshmellow -void printDemodBuff() +void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx) { - uint32_t i = 0; - int bitLen = DemodBufferLen; - if (bitLen<16) { - PrintAndLog("no bits found in demod buffer"); + if (buff == NULL) return; + + if ( size > MAX_DEMOD_BUF_LEN - startIdx) + size = MAX_DEMOD_BUF_LEN - startIdx; + + size_t i = 0; + for (; i < size; i++){ + DemodBuffer[i]=buff[startIdx++]; } - if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty - for (i = 0; i <= (bitLen-16); i+=16) { - PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i", - DemodBuffer[i], - DemodBuffer[i+1], - DemodBuffer[i+2], - DemodBuffer[i+3], - DemodBuffer[i+4], - DemodBuffer[i+5], - DemodBuffer[i+6], - DemodBuffer[i+7], - DemodBuffer[i+8], - DemodBuffer[i+9], - DemodBuffer[i+10], - DemodBuffer[i+11], - DemodBuffer[i+12], - DemodBuffer[i+13], - DemodBuffer[i+14], - DemodBuffer[i+15]); - } + DemodBufferLen=size; return; } +bool getDemodBuf(uint8_t *buff, size_t *size) { + if (buff == NULL) return false; + if (size == NULL) return false; + if (*size == 0) return false; -int CmdAmp(const char *Cmd) -{ - int i, rising, falling; - int max = INT_MIN, min = INT_MAX; + *size = (*size > DemodBufferLen) ? DemodBufferLen : *size; - for (i = 10; i < GraphTraceLen; ++i) { - if (GraphBuffer[i] > max) - max = GraphBuffer[i]; - if (GraphBuffer[i] < min) - min = GraphBuffer[i]; - } + memcpy(buff, DemodBuffer, *size); + return true; +} - if (max != min) { - rising = falling= 0; - for (i = 0; i < GraphTraceLen; ++i) { - if (GraphBuffer[i + 1] < GraphBuffer[i]) { - if (rising) { - GraphBuffer[i] = max; - rising = 0; - } - falling = 1; - } - if (GraphBuffer[i + 1] > GraphBuffer[i]) { - if (falling) { - GraphBuffer[i] = min; - falling = 0; - } - rising= 1; - } - } +// 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; } - RepaintGraphWindow(); - return 0; + return; } -/* - * Generic command to demodulate ASK. - * - * Argument is convention: positive or negative (High mod means zero - * or high mod means one) - * - * Updates the Graph trace with 0/1 values - * - * 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 CmdSetDebugMode(const char *Cmd) { - int i; - int c, high = 0, low = 0; - - // TODO: complain if we do not give 2 arguments here ! - // (AL - this doesn't make sense! we're only using one argument!!!) - sscanf(Cmd, "%i", &c); + int demod=0; + sscanf(Cmd, "%i", &demod); + g_debugMode=(uint8_t)demod; + return 1; +} - /* Detect high and lows and clock */ - // (AL - clock???) - for (i = 0; i < GraphTraceLen; ++i) - { - if (GraphBuffer[i] > high) - high = GraphBuffer[i]; - 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 { - GraphBuffer[0] = c; - } - for (i = 1; i < GraphTraceLen; ++i) { - /* Transitions are detected at each peak - * Transitions are either: - * - we're low: transition if we hit a high - * - we're high: transition if we hit a low - * (we need to do it this way because some tags keep high or - * 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))){ - GraphBuffer[i] = c; - } else { - /* No transition */ - GraphBuffer[i] = GraphBuffer[i - 1]; - } - } - RepaintGraphWindow(); - return 0; +int usage_data_printdemodbuf(){ + PrintAndLog("Usage: data printdemodbuffer x o l "); + PrintAndLog("Options: "); + PrintAndLog(" h This help"); + PrintAndLog(" x output in hex (omit for binary output)"); + PrintAndLog(" o enter offset in # of bits"); + PrintAndLog(" l enter length to print in # of bits or hex characters respectively"); + return 0; } //by marshmellow -void printBitStream(uint8_t BitStream[], uint32_t bitLen) +void printDemodBuff(void) { - uint32_t i = 0; - if (bitLen<16) { - PrintAndLog("Too few bits found: %d",bitLen); + int bitLen = DemodBufferLen; + if (bitLen<1) { + PrintAndLog("no bits found in demod buffer"); 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]); - } + if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty + + char *bin = sprint_bin_break(DemodBuffer,bitLen,16); + PrintAndLog("%s",bin); + return; } -//by marshmellow -//print EM410x ID in multiple formats -void printEM410x(uint64_t id) + +int CmdPrintDemodBuff(const char *Cmd) { - 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)); + char hex[512]={0x00}; + bool hexMode = false; + bool errors = false; + uint32_t offset = 0; //could be size_t but no param_get16... + uint32_t length = 512; + char cmdp = 0; + while(param_getchar(Cmd, cmdp) != 0x00) + { + switch(param_getchar(Cmd, cmdp)) + { + case 'h': + case 'H': + return usage_data_printdemodbuf(); + case 'x': + case 'X': + hexMode = true; + cmdp++; + break; + case 'o': + case 'O': + offset = param_get32ex(Cmd, cmdp+1, 0, 10); + if (!offset) errors = true; + cmdp += 2; + break; + case 'l': + case 'L': + length = param_get32ex(Cmd, cmdp+1, 512, 10); + if (!length) errors = true; + cmdp += 2; + break; + default: + PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp)); + errors = true; + break; } - return; + if(errors) break; + } + //Validations + if(errors) return usage_data_printdemodbuf(); + length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length; + int numBits = (length) & 0x00FFC; //make sure we don't exceed our string + + if (hexMode){ + char *buf = (char *) (DemodBuffer + offset); + numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits; + numBits = binarraytohex(hex, buf, numBits); + if (numBits==0) return 0; + PrintAndLog("DemodBuffer: %s",hex); + } else { + PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16)); + } + return 1; } //by marshmellow -//take binary from demod buffer and see if we can find an EM410x ID -int CmdEm410xDecode(const char *Cmd) +//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer +int CmdGetBitStream(const char *Cmd) { - uint64_t id=0; - // uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - // uint32_t i=0; - // i=getFromGraphBuf(BitStream); - id = Em410xDecode(DemodBuffer,DemodBufferLen); - printEM410x(id); - if (id>0) return 1; + int i; + CmdHpf(Cmd); + for (i = 0; i < GraphTraceLen; i++) { + if (GraphBuffer[i] >= 1) { + GraphBuffer[i] = 1; + } else { + GraphBuffer[i] = 0; + } + } + RepaintGraphWindow(); 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) -{ +//Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a' +// (amp may not be needed anymore) +//verbose will print results and demoding messages +//emSearch will auto search for EM410x format in bitstream +//askType switches decode: ask/raw = 0, ask/manchester = 1 +int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) { int invert=0; int clk=0; + int maxErr=100; + int maxLen=0; + uint8_t askamp = 0; + char amp = param_getchar(Cmd, 0); uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - sscanf(Cmd, "%i %i", &clk, &invert); + sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &); + if (!maxLen) maxLen = BIGBUF_SIZE; if (invert != 0 && invert != 1) { PrintAndLog("Invalid argument: %s", Cmd); return 0; } - + if (clk==1){ + invert=1; + clk=0; + } size_t BitLen = getFromGraphBuf(BitStream); - // PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen); - int errCnt=0; - errCnt = askmandemod(BitStream, &BitLen,&clk,&invert); - if (errCnt<0||BitLen<16){ //if fatal error (or -1) - // PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk); + if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen); + if (BitLen < 255) return 0; + if (maxLen < BitLen && maxLen != 0) BitLen = maxLen; + int foundclk = 0; + //amp before ST check + if (amp == 'a' || amp == 'A') { + askAmp(BitStream, BitLen); + } + bool st = false; + size_t ststart = 0, stend = 0; + if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend); + *stCheck = st; + if (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"); + //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; } - PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen); - + if (errCnt > maxErr){ + if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk); + return 0; + } + if (verbose || g_debugMode) 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); + 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); + else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk); + // Now output the bitstream to the scrollback by line of 16 bits + printDemodBuff(); + } - PrintAndLog("ASK/Manchester decoded bitstream:"); - // Now output the bitstream to the scrollback by line of 16 bits - setDemodBuf(BitStream,BitLen); - printDemodBuff(); - uint64_t lo =0; - lo = Em410xDecode(BitStream,BitLen); - if (lo>0){ - //set GraphBuffer for clone or sim command - PrintAndLog("EM410x pattern found: "); - printEM410x(lo); - return 1; + uint64_t lo = 0; + uint32_t hi = 0; + if (emSearch){ + AskEm410xDecode(true, &hi, &lo); } - //if (BitLen>16) return 1; - return 0; + return 1; +} +int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) { + bool st = false; + return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st); +} + +//by marshmellow +//takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a' +//attempts to demodulate ask while decoding manchester +//prints binary found and saves in graphbuffer for further commands +int Cmdaskmandemod(const char *Cmd) +{ + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod am [clock] [maxError] [maxLen] [amplify]"); + PrintAndLog(" ['s'] optional, check for Sequence Terminator"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect"); + PrintAndLog(" , 1 to invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100"); + PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)"); + PrintAndLog(" , 'a' to attempt demod with ask amplification, default = no amp"); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer"); + PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32"); + PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data"); + PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data"); + PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors"); + return 0; + } + bool st = true; + if (Cmd[0]=='s') + return ASKDemod_ext(Cmd++, true, false, 1, &st); + else if (Cmd[1] == 's') + return ASKDemod_ext(Cmd+=2, true, false, 1, &st); + else + return ASKDemod(Cmd, true, false, 1); } //by marshmellow @@ -296,30 +317,52 @@ int Cmdmandecoderaw(const char *Cmd) int i =0; int errCnt=0; size_t size=0; - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; + int invert=0; + int maxErr = 20; + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data manrawdecode [invert] [maxErr]"); + PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively"); + PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)"); + PrintAndLog(" [invert] invert output"); + PrintAndLog(" [maxErr] set number of errors allowed (default = 20)"); + PrintAndLog(""); + PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer"); + return 0; + } + if (DemodBufferLen==0) return 0; + uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0}; int high=0,low=0; for (;ihigh) high=DemodBuffer[i]; else if(DemodBuffer[i]1 || low <0 ){ - PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode"); + if (high>7 || low <0 ){ + PrintAndLog("Error: please raw demod the wave first then manchester raw decode"); return 0; } + + sscanf(Cmd, "%i %i", &invert, &maxErr); size=i; - errCnt=manrawdecode(BitStream, &size); - if (errCnt>=20){ + uint8_t alignPos = 0; + errCnt=manrawdecode(BitStream, &size, invert, &alignPos); + if (errCnt>=maxErr){ PrintAndLog("Too many errors: %d",errCnt); return 0; } PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt); - printBitStream(BitStream, size); + PrintAndLog("%s", sprint_bin_break(BitStream, size, 16)); if (errCnt==0){ uint64_t id = 0; - id = Em410xDecode(BitStream, size); - if (id>0) setDemodBuf(BitStream, size); - printEM410x(id); + uint32_t hi = 0; + size_t idx=0; + if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){ + //need to adjust to set bitstream back to manchester encoded data + //setDemodBuf(BitStream, size, idx); + + printEM410x(hi, id); + } } return 1; } @@ -327,113 +370,222 @@ int Cmdmandecoderaw(const char *Cmd) //by marshmellow //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 +//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit +// and "invert" default = 0 if 1 it will invert output +// the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects] int CmdBiphaseDecodeRaw(const char *Cmd) { - int i = 0; - int errCnt=0; size_t size=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 (;ihigh)high=DemodBuffer[i]; - else if(DemodBuffer[i] 3 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]"); + PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0"); + PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)"); + PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester"); + PrintAndLog(""); + PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position"); + PrintAndLog(" [invert <0|1>], set to 1 to invert output"); + PrintAndLog(" [maxErr int], set max errors tolerated - default=20"); + PrintAndLog(""); + PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer"); + PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output"); + return 0; } - if (high>1 || low <0){ - PrintAndLog("Error: please raw demod the wave first then decode"); + sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr); + if (DemodBufferLen==0) { + PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first"); return 0; } - size=i; - errCnt=BiphaseRawDecode(BitStream, &size, offset); - if (errCnt>=20){ + 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; + } + if (errCnt>maxErr){ PrintAndLog("Too many errors attempting to decode: %d",errCnt); return 0; } - PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt); - printBitStream(BitStream, size); - PrintAndLog("\nif bitstream does not look right try offset=1"); + + 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; } - //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) +// - ASK Demod then Biphase decode GraphBuffer samples +int ASKbiphaseDemod(const char *Cmd, bool verbose) { - 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); + //ask raw demod GraphBuffer first + int offset=0, clk=0, invert=0, maxErr=0; + sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr); + + 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_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); + if (errCnt < 0){ + if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt); return 0; } - size_t BitLen = getFromGraphBuf(BitStream); - int errCnt=0; - errCnt = askrawdemod(BitStream, &BitLen,&clk,&invert); - if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first) - PrintAndLog("no data found"); + if (errCnt > maxErr) { + if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt); 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 DemodBuffer - setDemodBuf(BitStream,BitLen); - - //output - if (errCnt>0){ - PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt); + //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(); } - 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) +//by marshmellow - see ASKbiphaseDemod +int Cmdaskbiphdemod(const char *Cmd) { - static int CorrelBuffer[MAX_GRAPH_TRACE_LEN]; - - int window = atoi(Cmd); - - if (window == 0) { - PrintAndLog("needs a window"); + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod ab [offset] [clock] [maxError] [maxLen] "); + PrintAndLog(" [offset], offset to begin biphase, default=0"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect"); + PrintAndLog(" , 1 to invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100"); + PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)"); + PrintAndLog(" , 'a' to attempt demod with ask amplification, default = no amp"); + PrintAndLog(" NOTE: can be entered as second or third argument"); + PrintAndLog(" NOTE: can be entered as first, second or last argument"); + PrintAndLog(" NOTE: any other arg must have previous args set to work"); + PrintAndLog(""); + PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester"); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer"); + PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified"); + PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32"); + PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data"); + PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data"); + PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors"); + PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp"); return 0; } - if (window >= GraphTraceLen) { - PrintAndLog("window must be smaller than trace (%d samples)", - GraphTraceLen); + return ASKbiphaseDemod(Cmd, true); +} + +//by marshmellow - see ASKDemod +int Cmdaskrawdemod(const char *Cmd) +{ + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod ar [clock] [maxError] [maxLen] [amplify]"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect"); + PrintAndLog(" , 1 to invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100"); + PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)"); + PrintAndLog(" , 'a' to attempt demod with ask amplification, default = no amp"); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer"); + PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified"); + PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32"); + PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data"); + PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data"); + PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors"); + PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp"); return 0; } + return ASKDemod(Cmd, true, false, 0); +} - PrintAndLog("performing %d correlations", GraphTraceLen - window); - - for (int i = 0; i < GraphTraceLen - window; ++i) { +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 < 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) { + //another max + Correlation = i-lastMax; + lastMax = i; + if (sum > maxSum) maxSum = sum; + } else if (sum > maxSum) { + maxSum=sum; + lastMax = i; + } + } + if (Correlation==0) { + //try again with wider margin + 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; + } + } } - GraphTraceLen = GraphTraceLen - window; - memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int)); + if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation); - RepaintGraphWindow(); + if (SaveGrph) { + //GraphTraceLen = GraphTraceLen - window; + memcpy(out, CorrelBuffer, len * sizeof(int)); + RepaintGraphWindow(); + } + return Correlation; +} + +int usage_data_autocorr(void) +{ + //print help + PrintAndLog("Usage: data autocorr [window] [g]"); + PrintAndLog("Options: "); + PrintAndLog(" h This help"); + PrintAndLog(" [window] window length for correlation - default = 4000"); + PrintAndLog(" g save back to GraphBuffer (overwrite)"); return 0; } +int CmdAutoCorr(const char *Cmd) +{ + char cmdp = param_getchar(Cmd, 0); + if (cmdp == 'h' || cmdp == 'H') + return usage_data_autocorr(); + int window = 4000; //set default + char grph=0; + bool updateGrph = false; + sscanf(Cmd, "%i %c", &window, &grph); + + if (window >= GraphTraceLen) { + PrintAndLog("window must be smaller than trace (%d samples)", + GraphTraceLen); + return 0; + } + if (grph == 'g') updateGrph=true; + return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true); +} + int CmdBitsamples(const char *Cmd) { int cnt = 0; @@ -456,540 +608,493 @@ int CmdBitsamples(const char *Cmd) return 0; } -/* - * Convert to a bitstream +int CmdBuffClear(const char *Cmd) +{ + UsbCommand c = {CMD_BUFF_CLEAR}; + SendCommand(&c); + ClearGraph(true); + return 0; +} + +int CmdDec(const char *Cmd) +{ + for (int i = 0; i < (GraphTraceLen / 2); ++i) + GraphBuffer[i] = GraphBuffer[i * 2]; + GraphTraceLen /= 2; + PrintAndLog("decimated by 2"); + RepaintGraphWindow(); + return 0; +} +/** + * Undecimate - I'd call it 'interpolate', but we'll save that + * name until someone does an actual interpolation command, not just + * blindly repeating samples + * @param Cmd + * @return */ -int CmdBitstream(const char *Cmd) +int CmdUndec(const char *Cmd) { - int i, j; - int bit; - int gtl; - int clock; - int low = 0; - int high = 0; - int hithigh, hitlow, first; - - /* Detect high and lows and clock */ - for (i = 0; i < GraphTraceLen; ++i) + if(param_getchar(Cmd, 0) == 'h') { - if (GraphBuffer[i] > high) - high = GraphBuffer[i]; - else if (GraphBuffer[i] < low) - low = GraphBuffer[i]; + PrintAndLog("Usage: data undec [factor]"); + PrintAndLog("This function performs un-decimation, by repeating each sample N times"); + PrintAndLog("Options: "); + PrintAndLog(" h This help"); + PrintAndLog(" factor The number of times to repeat each sample.[default:2]"); + PrintAndLog("Example: 'data undec 3'"); + return 0; } - /* Get our clock */ - clock = GetClock(Cmd, high, 1); - gtl = ClearGraph(0); - - bit = 0; - for (i = 0; i < (int)(gtl / clock); ++i) + uint8_t factor = param_get8ex(Cmd, 0,2, 10); + //We have memory, don't we? + int swap[MAX_GRAPH_TRACE_LEN] = { 0 }; + uint32_t g_index = 0, s_index = 0; + while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN) { - hithigh = 0; - hitlow = 0; - first = 1; - /* Find out if we hit both high and low peaks */ - for (j = 0; j < clock; ++j) - { - if (GraphBuffer[(i * clock) + j] == high) - hithigh = 1; - else if (GraphBuffer[(i * clock) + j] == low) - hitlow = 1; - /* it doesn't count if it's the first part of our read - because it's really just trailing from the last sequence */ - if (first && (hithigh || hitlow)) - hithigh = hitlow = 0; - else - first = 0; - - if (hithigh && hitlow) - break; - } + int count = 0; + for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++) + swap[s_index+count] = GraphBuffer[g_index]; - /* If we didn't hit both high and low peaks, we had a bit transition */ - if (!hithigh || !hitlow) - 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; + s_index += count; + g_index++; } + memcpy(GraphBuffer, swap, s_index * sizeof(int)); + GraphTraceLen = s_index; RepaintGraphWindow(); return 0; } -int CmdBuffClear(const char *Cmd) +//by marshmellow +//shift graph zero up or down based on input + or - +int CmdGraphShiftZero(const char *Cmd) { - UsbCommand c = {CMD_BUFF_CLEAR}; - SendCommand(&c); - ClearGraph(true); + + int shift=0; + //set options from parameters entered with the command + sscanf(Cmd, "%i", &shift); + int shiftedVal=0; + for(int i = 0; i127) + shiftedVal=127; + else if (shiftedVal<-127) + shiftedVal=-127; + GraphBuffer[i]= shiftedVal; + } + CmdNorm(""); return 0; } -int CmdDec(const char *Cmd) +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 +//takes a threshold length which is the measured length between two samples then determines an edge +int CmdAskEdgeDetect(const char *Cmd) { - for (int i = 0; i < (GraphTraceLen / 2); ++i) - GraphBuffer[i] = GraphBuffer[i * 2]; - GraphTraceLen /= 2; - PrintAndLog("decimated by 2"); + int thresLen = 25; + int ans = 0; + sscanf(Cmd, "%i", &thresLen); + + ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen); RepaintGraphWindow(); - return 0; + return ans; } /* Print our clock rate */ // uses data from graphbuffer +// adjusted to take char parameter for type of modulation to find the clock - by marshmellow. int CmdDetectClockRate(const char *Cmd) { - GetClock("",0,0); - //int clock = DetectASKClock(0); - //PrintAndLog("Auto-detected clock rate: %d", clock); - return 0; + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data detectclock [modulation] "); + PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of"); + PrintAndLog(" , specify the clock (optional - to get best start position only)"); + PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk"); + PrintAndLog(""); + PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer"); + PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer"); + PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer"); + PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer"); + } + int ans=0; + if (cmdp == 'a'){ + ans = GetAskClock(Cmd+1, true, false); + } else if (cmdp == 'f'){ + ans = GetFskClock("", true, false); + } else if (cmdp == 'n'){ + ans = GetNrzClock("", true, false); + } else if (cmdp == 'p'){ + ans = GetPskClock("", true, false); + } else { + PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help"); + } + return ans; +} + +char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert) +{ + static char fType[8]; + memset(fType, 0x00, 8); + char *fskType = fType; + if (fchigh==10 && fclow==8){ + if (invert) //fsk2a + memcpy(fskType, "FSK2a", 5); + else //fsk2 + memcpy(fskType, "FSK2", 4); + } else if (fchigh == 8 && fclow == 5) { + if (invert) + memcpy(fskType, "FSK1", 4); + else + memcpy(fskType, "FSK1a", 5); + } else { + memcpy(fskType, "FSK??", 5); + } + return fskType; } //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) +//takes 4 arguments - Clock, invert, fchigh, fclow +//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a)) +int FSKrawDemod(const char *Cmd, bool verbose) { //raw fsk demod no manchester decoding no start bit finding just get binary from wave + uint8_t rfLen, invert, fchigh, fclow; //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); + rfLen = param_get8(Cmd, 0); + invert = param_get8(Cmd, 1); + fchigh = param_get8(Cmd, 2); + fclow = param_get8(Cmd, 3); 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; + if (rfLen==1) { + invert = 1; //if invert option only is used + rfLen = 0; + } } - PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow); uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; size_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:"); - setDemodBuf(BitStream,size); + if (BitLen==0) return 0; + //get field clock lengths + uint16_t fcs=0; + if (!fchigh || !fclow) { + fcs = countFC(BitStream, BitLen, 1); + if (!fcs) { + fchigh = 10; + fclow = 8; + } else { + fchigh = (fcs >> 8) & 0x00FF; + fclow = fcs & 0x00FF; + } + } + //get bit clock length + if (!rfLen) { + int firstClockEdge = 0; //todo - align grid on graph with this... + rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge); + if (!rfLen) rfLen = 50; + } + 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 + 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)); + printDemodBuff(); + } - // 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"); + return 1; + } else { + if (g_debugMode) 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) +//by marshmellow +//fsk raw demod and print binary +//takes 4 arguments - Clock, invert, fchigh, fclow +//defaults: clock = 50, invert=1, fchigh=10, fclow=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 - uint32_t hi2=0, hi=0, lo=0; - - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; - size_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"); + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod fs [clock] [fchigh] [fclow]"); + PrintAndLog(" [set clock as integer] optional, omit for autodetect."); + PrintAndLog(" , 1 for invert output, can be used even if the clock is omitted"); + PrintAndLog(" [fchigh], larger field clock length, omit for autodetect"); + PrintAndLog(" [fclow], small field clock length, omit for autodetect"); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect"); + PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc"); + PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output"); + PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc"); + PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer"); + PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer"); + PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer"); return 0; } - if (hi2==0 && hi==0 && lo==0) return 0; - if (hi2 != 0){ //extra large HID tags - PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)", - (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); - setDemodBuf(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("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d", - (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF, - (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum); - setDemodBuf(BitStream,BitLen); - return 1; - } - return 0; + return FSKrawDemod(Cmd, true); } //by marshmellow -//IO-Prox demod - FSK RF/64 with preamble of 000000001 -//print ioprox ID and some format details -int CmdFSKdemodIO(const char *Cmd) +//attempt to psk1 demod graph buffer +int PSKDemod(const char *Cmd, bool verbose) { - //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; + int invert=0; + int clk=0; + int maxErr=100; + sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr); + if (clk==1){ + invert=1; + clk=0; + } + if (invert != 0 && invert != 1) { + if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd); + return 0; + } uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; size_t BitLen = getFromGraphBuf(BitStream); - //get binary from fsk wave - // PrintAndLog("DEBUG: got buff"); - idx = IOdemodFSK(BitStream,BitLen); - if (idx<0){ - //PrintAndLog("Error demoding fsk"); + if (BitLen==0) return 0; + int errCnt=0; + 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; - } - // PrintAndLog("DEBUG: Got IOdemodFSK"); - if (idx==0){ - //PrintAndLog("IO Prox Data not found - FSK Data:"); - //if (BitLen > 92) printBitStream(BitStream,92); + } + if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first) + if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt); 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("IO Prox XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2); - int i; - for (i=0;i<64;++i) - DemodBuffer[i]=BitStream[idx++]; - - DemodBufferLen=64; - return 1; -} -int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating -{ - 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, - 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, - }; - - int lowLen = sizeof (LowTone) / sizeof (int); - int highLen = sizeof (HighTone) / sizeof (int); - 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; - - for (j = 0; j < lowLen; ++j) { - lowSum += LowTone[j]*GraphBuffer[i+j]; - } - for (j = 0; j < highLen; ++j) { - highSum += HighTone[j] * GraphBuffer[i + j]; - } - lowSum = abs(100 * lowSum / lowLen); - highSum = abs(100 * highSum / highLen); - GraphBuffer[i] = (highSum << 16) | lowSum; - } - - for(i = 0; i < GraphTraceLen - convLen - 16; ++i) { - int lowTot = 0, highTot = 0; - // 10 and 8 are f_s divided by f_l and f_h, rounded - for (j = 0; j < 10; ++j) { - lowTot += (GraphBuffer[i+j] & 0xffff); + if (verbose || g_debugMode){ + PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen); + if (errCnt>0){ + PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt); } - for (j = 0; j < 8; j++) { - highTot += (GraphBuffer[i + j] >> 16); - } - GraphBuffer[i] = lowTot - highTot; - if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i]; - if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i]; } + //prime demod buffer for output + setDemodBuf(BitStream,BitLen,0); + setClockGrid(clk, startIdx); - GraphTraceLen -= (convLen + 16); - RepaintGraphWindow(); - - // 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; - for (j = 0; j < 3 * lowLen; ++j) { - dec -= GraphBuffer[i + j]; - } - for (; j < 3 * (lowLen + highLen ); ++j) { - dec += GraphBuffer[i + j]; - } - if (dec > max) { - max = dec; - maxPos = i; - } - } - - // place start of bit sync marker in graph - GraphBuffer[maxPos] = maxMark; - GraphBuffer[maxPos + 1] = minMark; - - maxPos += j; - - // place end of bit sync marker in graph - GraphBuffer[maxPos] = maxMark; - GraphBuffer[maxPos+1] = minMark; - - PrintAndLog("actual data bits start at sample %d", maxPos); - PrintAndLog("length %d/%d", highLen, lowLen); - - uint8_t bits[46]; - bits[sizeof(bits)-1] = '\0'; - - // find bit pairs and manchester decode them - for (i = 0; i < arraylen(bits) - 1; ++i) { - int dec = 0; - for (j = 0; j < lowLen; ++j) { - dec -= GraphBuffer[maxPos + j]; - } - for (; j < lowLen + highLen; ++j) { - dec += GraphBuffer[maxPos + j]; - } - maxPos += j; - // place inter bit marker in graph - GraphBuffer[maxPos] = maxMark; - GraphBuffer[maxPos + 1] = minMark; - - // hi and lo form a 64 bit pair - hi = (hi << 1) | (lo >> 31); - lo = (lo << 1); - // store decoded bit as binary (in hi/lo) and text (in bits[]) - if(dec < 0) { - bits[i] = '1'; - lo |= 1; - } else { - bits[i] = '0'; - } - } - PrintAndLog("bits: '%s'", bits); - PrintAndLog("hex: %08x %08x", hi, lo); - return 0; + return 1; } -int CmdDetectNRZpskClockRate(const char *Cmd) +// by marshmellow +// takes 3 arguments - clock, invert, maxErr as integers +// attempts to demodulate nrz only +// prints binary found and saves in demodbuffer for further commands +int NRZrawDemod(const char *Cmd, bool verbose) { - GetNRZpskClock("",0,0); - return 0; -} - -int PSKnrzDemod(const char *Cmd){ int invert=0; int clk=0; - sscanf(Cmd, "%i %i", &clk, &invert); + int maxErr=100; + sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr); + if (clk==1){ + invert=1; + clk=0; + } if (invert != 0 && invert != 1) { PrintAndLog("Invalid argument: %s", Cmd); - return -1; + return 0; } uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; size_t BitLen = getFromGraphBuf(BitStream); + if (BitLen==0) return 0; int errCnt=0; - errCnt = pskNRZrawDemod(BitStream, &BitLen,&clk,&invert); - if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first) - //PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt); - return -1; + int clkStartIdx = 0; + errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx); + if (errCnt > maxErr){ + if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt); + return 0; + } + if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first) + if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt); + return 0; } - PrintAndLog("Tried PSK/NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen); - + if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen); //prime demod buffer for output - setDemodBuf(BitStream,BitLen); - return errCnt; -} -// Indala 26 bit decode -// by marshmellow -// optional arguments - same as CmdpskNRZrawDemod (clock & invert) -int CmdIndalaDecode(const char *Cmd) -{ + setDemodBuf(BitStream,BitLen,0); + setClockGrid(clk, clkStartIdx); - int ans=PSKnrzDemod(Cmd); - if (ans < 0){ - PrintAndLog("Error1: %d",ans); - return 0; - } - uint8_t invert=0; - ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert); - if (ans < 1) { - PrintAndLog("Error2: %d",ans); - return -1; - } - char showbits[251]; - if(invert==1) PrintAndLog("Had to invert bits"); - //convert UID to HEX - uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7; - int idx; - uid1=0; - uid2=0; - PrintAndLog("BitLen: %d",DemodBufferLen); - if (DemodBufferLen==64){ - for( idx=0; idx<64; idx++) { - uid1=(uid1<<1)|(uid2>>31); - if (DemodBuffer[idx] == 0) { - uid2=(uid2<<1)|0; - showbits[idx]='0'; - } else { - uid2=(uid2<<1)|1; - showbits[idx]='1'; - } - } - showbits[idx]='\0'; - PrintAndLog("Indala UID=%s (%x%08x)", showbits, uid1, uid2); - } - else { - uid3=0; - uid4=0; - uid5=0; - uid6=0; - uid7=0; - for( idx=0; idx>31); - uid2=(uid2<<1)|(uid3>>31); - uid3=(uid3<<1)|(uid4>>31); - uid4=(uid4<<1)|(uid5>>31); - uid5=(uid5<<1)|(uid6>>31); - uid6=(uid6<<1)|(uid7>>31); - if (DemodBuffer[idx] == 0) { - uid7=(uid7<<1)|0; - showbits[idx]='0'; - } - else { - uid7=(uid7<<1)|1; - showbits[idx]='1'; - } - } - showbits[idx]='\0'; - PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7); + + if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt); + if (verbose || g_debugMode) { + PrintAndLog("NRZ demoded bitstream:"); + // Now output the bitstream to the scrollback by line of 16 bits + printDemodBuff(); } - return 1; + return 1; } -/* -//by marshmellow (attempt to get rid of high immediately after a low) -void pskCleanWave2(uint8_t *bitStream, int bitLen) +int CmdNRZrawDemod(const char *Cmd) { - int i; - int low=128; - int gap = 4; - // int loopMax = 2048; - int newLow=0; - - for (i=0; i 16 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect."); + PrintAndLog(" , 1 for invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100."); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer"); + PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32"); + PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data"); + PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data"); + PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors"); + return 0; } - return; -} -*/ -int CmdPskClean(const char *Cmd) -{ - uint8_t bitStream[MAX_GRAPH_TRACE_LEN]={0}; - size_t bitLen = getFromGraphBuf(bitStream); - pskCleanWave(bitStream, bitLen); - setGraphBuf(bitStream, bitLen); - return 0; + return NRZrawDemod(Cmd, true); } -//by marshmellow -//takes 2 arguments - clock and invert both as integers -//attempts to demodulate ask only -//prints binary found and saves in graphbuffer for further commands -int CmdpskNRZrawDemod(const char *Cmd) +// by marshmellow +// takes 3 arguments - clock, invert, maxErr as integers +// attempts to demodulate psk only +// prints binary found and saves in demodbuffer for further commands +int CmdPSK1rawDemod(const char *Cmd) { - int errCnt= PSKnrzDemod(Cmd); + int ans; + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect."); + PrintAndLog(" , 1 for invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100."); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer"); + PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32"); + PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data"); + PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data"); + PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors"); + return 0; + } + ans = PSKDemod(Cmd, true); //output - if (errCnt<0) return 0; - if (errCnt>0){ - PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt); + if (!ans){ + if (g_debugMode) PrintAndLog("Error demoding: %d",ans); + return 0; } - PrintAndLog("PSK or NRZ demoded bitstream:"); + + PrintAndLog("PSK1 demoded bitstream:"); // Now output the bitstream to the scrollback by line of 16 bits printDemodBuff(); + return 1; +} +// by marshmellow +// takes same args as cmdpsk1rawdemod +int CmdPSK2rawDemod(const char *Cmd) +{ + int ans=0; + char cmdp = param_getchar(Cmd, 0); + if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]"); + PrintAndLog(" [set clock as integer] optional, if not set, autodetect."); + PrintAndLog(" , 1 for invert output"); + PrintAndLog(" [set maximum allowed errors], default = 100."); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock"); + PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32"); + PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output"); + PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output"); + PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors"); + return 0; + } + ans=PSKDemod(Cmd, true); + if (!ans){ + if (g_debugMode) PrintAndLog("Error demoding: %d",ans); + return 0; + } + psk1TOpsk2(DemodBuffer, DemodBufferLen); + PrintAndLog("PSK2 demoded bitstream:"); + // Now output the bitstream to the scrollback by line of 16 bits + printDemodBuff(); return 1; } +// by marshmellow - combines all raw demod functions into one menu command +int CmdRawDemod(const char *Cmd) +{ + char cmdp = Cmd[0]; //param_getchar(Cmd, 0); + + if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) { + PrintAndLog("Usage: data rawdemod [modulation] |"); + PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ..."); + PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2"); + PrintAndLog(" as 'h', prints the help for the specific modulation"); + PrintAndLog(" see specific modulation help for optional parameters"); + PrintAndLog(""); + PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod"); + PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect"); + PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect"); + PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect"); + PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect"); + PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect"); + PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect"); + PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect"); + return 0; + } + char cmdp2 = Cmd[1]; + int ans = 0; + if (cmdp == 'f' && cmdp2 == 's'){ + ans = CmdFSKrawdemod(Cmd+2); + } else if(cmdp == 'a' && cmdp2 == 'b'){ + ans = Cmdaskbiphdemod(Cmd+2); + } else if(cmdp == 'a' && cmdp2 == 'm'){ + ans = Cmdaskmandemod(Cmd+2); + } else if(cmdp == 'a' && cmdp2 == 'r'){ + ans = Cmdaskrawdemod(Cmd+2); + } else if(cmdp == 'n' && cmdp2 == 'r'){ + ans = CmdNRZrawDemod(Cmd+2); + } else if(cmdp == 'p' && cmdp2 == '1'){ + ans = CmdPSK1rawDemod(Cmd+2); + } else if(cmdp == 'p' && cmdp2 == '2'){ + ans = CmdPSK2rawDemod(Cmd+2); + } else { + PrintAndLog("unknown modulation entered - see help ('h') for parameter structure"); + } + 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) { @@ -1000,6 +1105,12 @@ int CmdGrid(const char *Cmd) return 0; } +int CmdSetGraphMarkers(const char *Cmd) { + sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos); + RepaintGraphWindow(); + return 0; +} + int CmdHexsamples(const char *Cmd) { int i, j; @@ -1007,7 +1118,7 @@ int CmdHexsamples(const char *Cmd) int offset = 0; char string_buf[25]; char* string_ptr = string_buf; - uint8_t got[40000]; + uint8_t got[BIGBUF_SIZE]; sscanf(Cmd, "%i %i", &requested, &offset); @@ -1016,7 +1127,7 @@ int CmdHexsamples(const char *Cmd) requested = 8; } if (offset + requested > sizeof(got)) { - PrintAndLog("Tried to read past end of buffer, + > 40000"); + PrintAndLog("Tried to read past end of buffer, + > %d", BIGBUF_SIZE); return 0; } @@ -1049,6 +1160,7 @@ int CmdHide(const char *Cmd) return 0; } +//zero mean GraphBuffer int CmdHpf(const char *Cmd) { int i; @@ -1064,35 +1176,91 @@ int CmdHpf(const char *Cmd) return 0; } -int CmdSamples(const char *Cmd) +uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b) { - int cnt = 0; - int n; - uint8_t got[40000]; + int i; + uint8_t val = 0; + for(i =0 ; i < bits_per_sample; i++) + { + val |= (headBit(b) << (7-i)); + } + return val; +} + +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 + // in the last byte in case the bits-per-sample + // does not line up on byte boundaries - n = strtol(Cmd, NULL, 0); - if (n == 0) n = 6000; - if (n > sizeof(got)) n = sizeof(got); + uint8_t got[BIGBUF_SIZE-1] = { 0 }; - PrintAndLog("Reading %d samples\n", n); + if (n == 0 || n > sizeof(got)) + n = sizeof(got); + + if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n); GetFromBigBuf(got,n,0); - WaitForResponse(CMD_ACK,NULL); - for (int j = 0; j < n; j++) { - GraphBuffer[cnt++] = ((int)got[j]) - 128; + if (!silent) PrintAndLog("Data fetched"); + UsbCommand response; + WaitForResponse(CMD_ACK, &response); + uint8_t bits_per_sample = 8; + + //Old devices without this feature would send 0 at arg[0] + if(response.arg[0] > 0) + { + sample_config *sc = (sample_config *) response.d.asBytes; + 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) + { + 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++) { + uint8_t sample = getByte(bits_per_sample, &bout); + GraphBuffer[j] = ((int) sample )- 128; + } + GraphTraceLen = j; + PrintAndLog("Unpacked %d samples" , j ); + }else + { + for (int j = 0; j < n; j++) { + GraphBuffer[j] = ((int)got[j]) - 128; + } + GraphTraceLen = n; } - PrintAndLog("Done!\n"); - GraphTraceLen = n; + setClockGrid(0,0); + DemodBufferLen = 0; RepaintGraphWindow(); return 0; } +int CmdSamples(const char *Cmd) +{ + int n = strtol(Cmd, NULL, 0); + return getSamples(n, false); +} + int CmdTuneSamples(const char *Cmd) { - int timeout = 0; + int timeout = 0, arg = FLAG_TUNE_ALL; + + if(*Cmd == 'l') { + arg = FLAG_TUNE_LF; + } else if (*Cmd == 'h') { + arg = FLAG_TUNE_HF; + } else if (*Cmd != '\0') { + PrintAndLog("use 'tune' or 'tune l' or 'tune h'"); + return 0; + } + printf("\nMeasuring antenna characteristics, please wait..."); - UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING}; + UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}}; SendCommand(&c); UsbCommand resp; @@ -1117,33 +1285,48 @@ int CmdTuneSamples(const char *Cmd) 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) + + #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher. + #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher. + #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher. + #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher. + + if (peakv < LF_UNUSABLE_V) PrintAndLog("# Your LF antenna is unusable."); - else if (peakv<10000) + else if (peakv < LF_MARGINAL_V) PrintAndLog("# Your LF antenna is marginal."); - if (vHf<2000) + if (vHf < HF_UNUSABLE_V) PrintAndLog("# Your HF antenna is unusable."); - else if (vHf<5000) + else if (vHf < HF_MARGINAL_V) PrintAndLog("# Your HF antenna is marginal."); - for (int i = 0; i < 256; i++) { - GraphBuffer[i] = resp.d.asBytes[i] - 128; + if (peakv >= LF_UNUSABLE_V) { + for (int i = 0; i < 256; i++) { + GraphBuffer[i] = resp.d.asBytes[i] - 128; + } + PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n"); + PrintAndLog("\n"); + GraphTraceLen = 256; + ShowGraphWindow(); + RepaintGraphWindow(); } - PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n"); - PrintAndLog("\n"); - GraphTraceLen = 256; - ShowGraphWindow(); - - return 0; + return 0; } int CmdLoad(const char *Cmd) { - FILE *f = fopen(Cmd, "r"); + char filename[FILE_PATH_SIZE] = {0x00}; + int len = 0; + + len = strlen(Cmd); + if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE; + memcpy(filename, Cmd, len); + + FILE *f = fopen(filename, "r"); if (!f) { - PrintAndLog("couldn't open '%s'", Cmd); + PrintAndLog("couldn't open '%s'", filename); return 0; } @@ -1155,6 +1338,8 @@ int CmdLoad(const char *Cmd) } fclose(f); PrintAndLog("loaded %d samples", GraphTraceLen); + setClockGrid(0,0); + DemodBufferLen = 0; RepaintGraphWindow(); return 0; } @@ -1162,7 +1347,7 @@ int CmdLoad(const char *Cmd) int CmdLtrim(const char *Cmd) { int ds = atoi(Cmd); - + if (GraphTraceLen<=0) return 0; for (int i = ds; i < GraphTraceLen; ++i) GraphBuffer[i-ds] = GraphBuffer[i]; GraphTraceLen -= ds; @@ -1170,6 +1355,8 @@ int CmdLtrim(const char *Cmd) RepaintGraphWindow(); return 0; } + +// trim graph to input argument length int CmdRtrim(const char *Cmd) { int ds = atoi(Cmd); @@ -1180,244 +1367,21 @@ int CmdRtrim(const char *Cmd) return 0; } -/* - * Manchester demodulate a bitstream. The bitstream needs to be already in - * the GraphBuffer as 0 and 1 values - * - * Give the clock rate as argument in order to help the sync - the algorithm - * resyncs at each pulse anyway. - * - * Not optimized by any means, this is the 1st time I'm writing this type of - * routine, feel free to improve... - * - * 1st argument: clock rate (as number of samples per clock rate) - * Typical values can be 64, 32, 128... - */ -int CmdManchesterDemod(const char *Cmd) -{ - int i, j, invert= 0; - int bit; - int clock; - int lastval = 0; - int low = 0; - int high = 0; - int hithigh, hitlow, first; - int lc = 0; - int bitidx = 0; - int bit2idx = 0; - int warnings = 0; - - /* check if we're inverting output */ - if (*Cmd == 'i') - { - PrintAndLog("Inverting output"); - invert = 1; - ++Cmd; - do - ++Cmd; - while(*Cmd == ' '); // in case a 2nd argument was given - } - - /* Holds the decoded bitstream: each clock period contains 2 bits */ - /* later simplified to 1 bit after manchester decoding. */ - /* Add 10 bits to allow for noisy / uncertain traces without aborting */ - /* int BitStream[GraphTraceLen*2/clock+10]; */ - - /* But it does not work if compiling on WIndows: therefore we just allocate a */ - /* large array */ - uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0}; - - /* Detect high and lows */ - for (i = 0; i < GraphTraceLen; i++) - { - if (GraphBuffer[i] > high) - high = GraphBuffer[i]; - else if (GraphBuffer[i] < low) - low = GraphBuffer[i]; - } - - /* Get our clock */ - clock = GetClock(Cmd, high, 1); - - int tolerance = clock/4; - - /* Detect first transition */ - /* Lo-Hi (arbitrary) */ - /* skip to the first high */ - for (i= 0; i < GraphTraceLen; i++) - if (GraphBuffer[i] == high) - break; - /* now look for the first low */ - for (; i < GraphTraceLen; i++) - { - if (GraphBuffer[i] == low) - { - lastval = i; - break; - } - } - - /* If we're not working with 1/0s, demod based off clock */ - if (high != 1) - { - bit = 0; /* We assume the 1st bit is zero, it may not be - * the case: this routine (I think) has an init problem. - * Ed. - */ - for (; i < (int)(GraphTraceLen / clock); i++) - { - hithigh = 0; - hitlow = 0; - first = 1; - - /* Find out if we hit both high and low peaks */ - for (j = 0; j < clock; j++) - { - if (GraphBuffer[(i * clock) + j] == high) - hithigh = 1; - else if (GraphBuffer[(i * clock) + j] == low) - hitlow = 1; - - /* it doesn't count if it's the first part of our read - because it's really just trailing from the last sequence */ - if (first && (hithigh || hitlow)) - hithigh = hitlow = 0; - else - first = 0; - - if (hithigh && hitlow) - break; - } - - /* If we didn't hit both high and low peaks, we had a bit transition */ - if (!hithigh || !hitlow) - bit ^= 1; - - BitStream[bit2idx++] = bit ^ invert; - } - } - - /* standard 1/0 bitstream */ - else - { - - /* Then detect duration between 2 successive transitions */ - for (bitidx = 1; i < GraphTraceLen; i++) - { - 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 { - // 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)"); - - if (warnings > 10) - { - PrintAndLog("Error: too many detection errors, aborting."); - return 0; - } - } - } - } +// trim graph (middle) piece +int CmdMtrim(const char *Cmd) { + int start = 0, stop = 0; + sscanf(Cmd, "%i %i", &start, &stop); - // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream - // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful - // to stop output at the final bitidx2 value, not bitidx - 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++; - warnings++; - PrintAndLog("Unsynchronized, resync..."); - PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)"); - - if (warnings > 10) - { - PrintAndLog("Error: too many decode errors, aborting."); - return 0; - } - } - } - } + if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0; + start++; //leave start position sample - PrintAndLog("Manchester decoded bitstream"); - // Now output the bitstream to the scrollback by line of 16 bits - for (i = 0; i < (bit2idx-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]); + GraphTraceLen = stop - start; + for (int i = 0; i < GraphTraceLen; i++) { + GraphBuffer[i] = GraphBuffer[start+i]; } return 0; } -/* Modulate our data into manchester */ -int CmdManchesterMod(const char *Cmd) -{ - int i, j; - int clock; - int bit, lastbit, wave; - - /* Get our clock */ - clock = GetClock(Cmd, 0, 1); - - wave = 0; - lastbit = 1; - for (i = 0; i < (int)(GraphTraceLen / clock); i++) - { - bit = GraphBuffer[i * clock] ^ 1; - - for (j = 0; j < (int)(clock/2); j++) - GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave; - for (j = (int)(clock/2); j < clock; j++) - GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1; - - /* Keep track of how we start our wave and if we changed or not this time */ - wave ^= bit ^ lastbit; - lastbit = bit; - } - - RepaintGraphWindow(); - return 0; -} int CmdNorm(const char *Cmd) { @@ -1433,8 +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 } } @@ -1450,9 +1413,17 @@ int CmdPlot(const char *Cmd) int CmdSave(const char *Cmd) { - FILE *f = fopen(Cmd, "w"); + char filename[FILE_PATH_SIZE] = {0x00}; + int len = 0; + + len = strlen(Cmd); + if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE; + memcpy(filename, Cmd, len); + + + FILE *f = fopen(filename, "w"); if(!f) { - PrintAndLog("couldn't open '%s'", Cmd); + PrintAndLog("couldn't open '%s'", filename); return 0; } int i; @@ -1475,17 +1446,31 @@ int CmdScale(const char *Cmd) return 0; } -int CmdThreshold(const char *Cmd) +int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down) { - int threshold = atoi(Cmd); + 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 = 0; i < GraphTraceLen; ++i) { - if (GraphBuffer[i] >= threshold) - GraphBuffer[i] = 1; + for (int i = 1; i < len; ++i) { + // Apply first threshold to samples heading up + if (in[i] >= up && in[i] > lastValue) + { + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = 1; + } + // Apply second threshold to samples heading down + else if (in[i] <= down && in[i] < lastValue) + { + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = -1; + } else - GraphBuffer[i] = -1; + { + lastValue = out[i]; // Buffer last value as we overwrite it. + out[i] = out[i-1]; + } } - RepaintGraphWindow(); + out[0] = out[1]; // Align with first edited sample. return 0; } @@ -1496,30 +1481,7 @@ int CmdDirectionalThreshold(const char *Cmd) 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. - - for (int i = 1; i < GraphTraceLen; ++i) { - // Apply first threshold to samples heading up - if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue) - { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = 1; - } - // Apply second threshold to samples heading down - else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue) - { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = -1; - } - else - { - lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. - GraphBuffer[i] = GraphBuffer[i-1]; - - } - } - GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample. + directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres); RepaintGraphWindow(); return 0; } @@ -1553,47 +1515,334 @@ int CmdZerocrossings(const char *Cmd) return 0; } +int usage_data_bin2hex(){ + PrintAndLog("Usage: data bin2hex "); + PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)"); + return 0; +} + +/** + * @brief Utility for conversion via cmdline. + * @param Cmd + * @return + */ +int Cmdbin2hex(const char *Cmd) +{ + int bg =0, en =0; + if(param_getptr(Cmd, &bg, &en, 0)) + { + return usage_data_bin2hex(); + } + //Number of digits supplied as argument + size_t length = en - bg +1; + size_t bytelen = (length+7) / 8; + uint8_t* arr = (uint8_t *) malloc(bytelen); + memset(arr, 0, bytelen); + BitstreamOut bout = { arr, 0, 0 }; + + for(; bg <= en ;bg++) + { + char c = Cmd[bg]; + if( c == '1') pushBit(&bout, 1); + else if( c == '0') pushBit(&bout, 0); + else PrintAndLog("Ignoring '%c'", c); + } + + if(bout.numbits % 8 != 0) + { + printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8)); + } + + //Uses printf instead of PrintAndLog since the latter + // adds linebreaks to each printout - this way was more convenient since we don't have to + // allocate a string and write to that first... + for(size_t x = 0; x < bytelen ; x++) + { + printf("%02X", arr[x]); + } + printf("\n"); + free(arr); + return 0; +} + +int usage_data_hex2bin() { + PrintAndLog("Usage: data hex2bin "); + PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)"); + return 0; + +} + +int Cmdhex2bin(const char *Cmd) +{ + int bg =0, en =0; + if(param_getptr(Cmd, &bg, &en, 0)) + { + return usage_data_hex2bin(); + } + + + while(bg <= en ) + { + char x = Cmd[bg++]; + // capitalize + if (x >= 'a' && x <= 'f') + x -= 32; + // convert to numeric value + if (x >= '0' && x <= '9') + x -= '0'; + else if (x >= 'A' && x <= 'F') + x -= 'A' - 10; + else + continue; + + //Uses printf instead of PrintAndLog since the latter + // adds linebreaks to each printout - this way was more convenient since we don't have to + // allocate a string and write to that first... + + for(int i= 0 ; i < 4 ; ++i) + printf("%d",(x >> (3 - i)) & 1); + } + printf("\n"); + + 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"}, - {"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 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 +/-128"}, - {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"}, - {"pskclean", CmdPskClean, 1, "Attempt to clean psk wave"}, - {"pskdetectclock",CmdDetectNRZpskClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"}, - {"pskindalademod",CmdIndalaDecode, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk indala tags and output ID binary & hex (args optional[clock will try Auto-detect])"}, - {"psknrzrawdemod",CmdpskNRZrawDemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk or nrz tags and output binary (args optional[clock will try Auto-detect])"}, - {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window"}, - {"save", CmdSave, 1, " -- Save trace (from graph window)"}, - {"scale", CmdScale, 1, " -- Set cursor display scale"}, - {"threshold", CmdThreshold, 1, " -- Maximize/minimize every value in the graph window depending on threshold"}, - {"dirthreshold", CmdDirectionalThreshold, 1, " -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."}, - {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"}, - {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"}, + {"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)"}, + {"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"}, + {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"}, + {"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)"}, + {"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"}, + {"hex2bin", Cmdhex2bin, 1, "hex2bin -- Converts hexadecimal to binary"}, + {"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"}, + {"mtrim", CmdMtrim, 1, " -- Trim out samples from the specified start to the specified stop"}, + {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"}, + {"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"}, + {"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)"}, + {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"}, + {"scale", CmdScale, 1, " -- Set cursor display scale"}, + {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"}, + {"shiftgraphzero", CmdGraphShiftZero, 1, " -- Shift 0 for Graphed wave + or - shift value"}, + {"dirthreshold", CmdDirectionalThreshold, 1, " -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."}, + {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"}, + {"undec", CmdUndec, 1, "Un-decimate samples by 2"}, + {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"}, {NULL, NULL, 0, NULL} };