X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0e74c023bd73e4516652f1656794a2edc2b12abc..5ebdce44c014ae29d688367508d0a6f6e6ebc673:/client/graph.c?ds=inline diff --git a/client/graph.c b/client/graph.c index 18ff972a..06279848 100644 --- a/client/graph.c +++ b/client/graph.c @@ -9,32 +9,35 @@ //----------------------------------------------------------------------------- #include <stdio.h> +#include <stdbool.h> #include <string.h> #include "ui.h" #include "graph.h" +#include "lfdemod.h" int GraphBuffer[MAX_GRAPH_TRACE_LEN]; int GraphTraceLen; - -/* write a bit to the graph */ +/* write a manchester bit to the graph */ void AppendGraph(int redraw, int clock, int bit) { int i; - + //set first half the clock bit (all 1's or 0's for a 0 or 1 bit) for (i = 0; i < (int)(clock / 2); ++i) - GraphBuffer[GraphTraceLen++] = bit ^ 1; - + GraphBuffer[GraphTraceLen++] = bit ; + //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit) for (i = (int)(clock / 2); i < clock; ++i) - GraphBuffer[GraphTraceLen++] = bit; + GraphBuffer[GraphTraceLen++] = bit ^ 1; if (redraw) RepaintGraphWindow(); } -/* clear out our graph window */ +// clear out our graph window int ClearGraph(int redraw) { int gtl = GraphTraceLen; + memset(GraphBuffer, 0x00, GraphTraceLen); + GraphTraceLen = 0; if (redraw) @@ -42,132 +45,222 @@ int ClearGraph(int redraw) return gtl; } +// option '1' to save GraphBuffer any other to restore +void save_restoreGB(uint8_t saveOpt) +{ + static int SavedGB[MAX_GRAPH_TRACE_LEN]; + static int SavedGBlen; + static bool GB_Saved = false; + + if (saveOpt==1) { //save + memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer)); + SavedGBlen = GraphTraceLen; + GB_Saved=true; + } else if (GB_Saved){ //restore + memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer)); + GraphTraceLen = SavedGBlen; + RepaintGraphWindow(); + } + return; +} -/* - * Detect clock rate - */ - //decommissioned - has difficulty detecting rf/32 and only works if data is manchester encoded -/* -int DetectClock2(int peak) +// DETECT CLOCK NOW IN LFDEMOD.C + +void setGraphBuf(uint8_t *buff, size_t size) { - int i; - int clock = 0xFFFF; - int lastpeak = 0; - - // Detect peak if we don't have one - if (!peak) - for (i = 0; i < GraphTraceLen; ++i) - if (GraphBuffer[i] > peak) - peak = GraphBuffer[i]; - - // peak=(int)(peak*.75); - for (i = 1; i < GraphTraceLen; ++i) - { - // If this is the beginning of a peak - if (GraphBuffer[i - 1] != GraphBuffer[i] && GraphBuffer[i] >= peak) - { - // Find lowest difference between peaks - if (lastpeak && i - lastpeak < clock) - clock = i - lastpeak; - lastpeak = i; - } - } - - return clock; + if ( buff == NULL ) return; + + uint16_t i = 0; + if ( size > MAX_GRAPH_TRACE_LEN ) + size = MAX_GRAPH_TRACE_LEN; + ClearGraph(0); + for (; i < size; ++i){ + GraphBuffer[i]=buff[i]-128; + } + GraphTraceLen=size; + RepaintGraphWindow(); + return; +} +size_t getFromGraphBuf(uint8_t *buff) +{ + if (buff == NULL ) return 0; + uint32_t i; + for (i=0;i<GraphTraceLen;++i){ + if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim + if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim + buff[i]=(uint8_t)(GraphBuffer[i]+128); + } + return i; +} + +// A simple test to see if there is any data inside Graphbuffer. +bool HasGraphData(){ + + if ( GraphTraceLen <= 0) { + PrintAndLog("No data available, try reading something first"); + return false; + } + return true; +} + +// Detect high and lows in Grapbuffer. +// Only loops the first 256 values. +void DetectHighLowInGraph(int *high, int *low, bool addFuzz) { + + uint8_t loopMax = 255; + if ( loopMax > GraphTraceLen) + loopMax = GraphTraceLen; + + for (uint8_t i = 0; i < loopMax; ++i) { + if (GraphBuffer[i] > *high) + *high = GraphBuffer[i]; + else if (GraphBuffer[i] < *low) + *low = GraphBuffer[i]; + } + + //12% fuzz in case highs and lows aren't clipped + if (addFuzz) { + *high = (int)(*high * .88); + *low = (int)(*low * .88); + } +} + +// Get or auto-detect ask clock rate +int GetAskClock(const char str[], bool printAns, bool verbose) +{ + int clock; + sscanf(str, "%i", &clock); + if (!strcmp(str, "")) + clock = 0; + + if (clock != 0) + return clock; + // Auto-detect clock + uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(grph); + if (size == 0) { + if (verbose) + PrintAndLog("Failed to copy from graphbuffer"); + return -1; + } + int start = DetectASKClock(grph, size, &clock, 20); + // Only print this message if we're not looping something + if (printAns){ + PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start); + } + return clock; +} + +uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose) +{ + uint8_t carrier=0; + uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(grph); + if ( size == 0 ) { + if (verbose) + PrintAndLog("Failed to copy from graphbuffer"); + return 0; + } + //uint8_t countPSK_FC(uint8_t *BitStream, size_t size) + + carrier = countFC(grph,size,0); + // Only print this message if we're not looping something + if (printAns){ + PrintAndLog("Auto-detected PSK carrier rate: %d", carrier); + } + return carrier; } -*/ -// by marshmellow -// not perfect especially with lower clocks or VERY good antennas (heavy wave clipping) -// maybe somehow adjust peak trimming value based on samples to fix? -int DetectClock(int peak) +int GetPskClock(const char str[], bool printAns, bool verbose) { - int i=0; - int low=0; - int clk[]={16,32,40,50,64,100,128,256}; - if (!peak){ - for (i=0;i<GraphTraceLen;++i){ - if(GraphBuffer[i]>peak){ - peak = GraphBuffer[i]; - } - if(GraphBuffer[i]<low){ - low = GraphBuffer[i]; - } - } - peak=(int)(peak*.75); - low= (int)(low*.75); - } - //int numbits; - int ii; - int loopCnt = 256; - if (GraphTraceLen<loopCnt) loopCnt = GraphTraceLen; - int clkCnt; - int tol = 0; - int bestErr=1000; - int errCnt[]={0,0,0,0,0,0,0,0}; - // int good; - for(clkCnt=0; clkCnt<6;++clkCnt){ - if (clk[clkCnt]==32){ - tol=1; - }else{ - tol=0; - } - bestErr=1000; - for (ii=0; ii<loopCnt; ++ii){ - if ((GraphBuffer[ii]>=peak) || (GraphBuffer[ii]<=low)){ - //numbits=0; - //good=1; - errCnt[clkCnt]=0; - for (i=0; i<((int)(GraphTraceLen/clk[clkCnt])-1); ++i){ - if (GraphBuffer[ii+(i*clk[clkCnt])]>=peak || GraphBuffer[ii+(i*clk[clkCnt])]<=low){ - //numbits++; - }else if(GraphBuffer[ii+(i*clk[clkCnt])-tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])-tol]<=low){ - }else if(GraphBuffer[ii+(i*clk[clkCnt])+tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])+tol]<=low){ - }else{ //error no peak detected - //numbits=0; - //good=0; - errCnt[clkCnt]++; - //break; - } - } - if(errCnt[clkCnt]==0) return clk[clkCnt]; - if(errCnt[clkCnt]<bestErr) bestErr=errCnt[clkCnt]; - } - } - errCnt[clkCnt]=bestErr; - } - int iii=0; - int best=0; - for (iii=0; iii<6;++iii){ - if (errCnt[iii]<errCnt[best]){ - best = iii; - } - } - PrintAndLog("clkCnt: %d, ii: %d, i: %d peak: %d, low: %d, errcnt: %d, errCnt64: %d",clkCnt,ii,i,peak,low,errCnt[best],errCnt[4]); - return clk[best]; + int clock; + sscanf(str, "%i", &clock); + if (!strcmp(str, "")) + clock = 0; + + if (clock!=0) + return clock; + // Auto-detect clock + uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(grph); + if ( size == 0 ) { + if (verbose) + PrintAndLog("Failed to copy from graphbuffer"); + return -1; + } + clock = DetectPSKClock(grph,size,0); + // Only print this message if we're not looping something + if (printAns){ + PrintAndLog("Auto-detected clock rate: %d", clock); + } + return clock; } +uint8_t GetNrzClock(const char str[], bool printAns, bool verbose) +{ + int clock; + sscanf(str, "%i", &clock); + if (!strcmp(str, "")) + clock = 0; -/* Get or auto-detect clock rate */ -int GetClock(const char *str, int peak, int verbose) + if (clock!=0) + return clock; + // Auto-detect clock + uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(grph); + if ( size == 0 ) { + if (verbose) + PrintAndLog("Failed to copy from graphbuffer"); + return -1; + } + clock = DetectNRZClock(grph, size, 0); + // Only print this message if we're not looping something + if (printAns){ + PrintAndLog("Auto-detected clock rate: %d", clock); + } + return clock; +} +//by marshmellow +//attempt to detect the field clock and bit clock for FSK +uint8_t GetFskClock(const char str[], bool printAns, bool verbose) { - int clock; -// int clock2; - sscanf(str, "%i", &clock); - if (!strcmp(str, "")) - clock = 0; - - /* Auto-detect clock */ - if (!clock) - { - clock = DetectClock(peak); - //clock2 = DetectClock2(peak); - /* Only print this message if we're not looping something */ - if (!verbose){ - PrintAndLog("Auto-detected clock rate: %d", clock); - //PrintAndLog("clock2: %d",clock2); - } - } - - return clock; + int clock; + sscanf(str, "%i", &clock); + if (!strcmp(str, "")) + clock = 0; + if (clock != 0) return (uint8_t)clock; + + + uint8_t fc1=0, fc2=0, rf1=0; + uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose); + if (ans == 0) return 0; + if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){ + if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1); + return rf1; + } + if (verbose){ + PrintAndLog("DEBUG: unknown fsk field clock detected"); + PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1); + } + return 0; +} +uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose) +{ + uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(BitStream); + if (size==0) return 0; + uint16_t ans = countFC(BitStream, size, 1); + if (ans==0) { + if (verbose) PrintAndLog("DEBUG: No data found"); + return 0; + } + *fc1 = (ans >> 8) & 0xFF; + *fc2 = ans & 0xFF; + + *rf1 = detectFSKClk(BitStream, size, *fc1, *fc2); + if (*rf1==0) { + if (verbose) PrintAndLog("DEBUG: Clock detect error"); + return 0; + } + return 1; }