X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c12512e99ad08689e171e80a01f7148e55ee64e1..refs/pull/264/head:/client/graph.c?ds=inline diff --git a/client/graph.c b/client/graph.c index 9079e073..995a32da 100644 --- a/client/graph.c +++ b/client/graph.c @@ -9,46 +9,71 @@ //----------------------------------------------------------------------------- #include +#include #include #include "ui.h" #include "graph.h" #include "lfdemod.h" +#include "cmddata.h" //for g_debugmode 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; - - for (i = 0; i < (int)(clock / 2); ++i) - GraphBuffer[GraphTraceLen++] = bit ^ 1; + 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 ; + //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 ^ 1; - for (i = (int)(clock / 2); i < clock; ++i) - GraphBuffer[GraphTraceLen++] = bit; - - if (redraw) - RepaintGraphWindow(); + if (redraw) + RepaintGraphWindow(); } // clear out our graph window int ClearGraph(int redraw) { - int gtl = GraphTraceLen; - GraphTraceLen = 0; + int gtl = GraphTraceLen; + memset(GraphBuffer, 0x00, GraphTraceLen); - if (redraw) - RepaintGraphWindow(); + GraphTraceLen = 0; + + if (redraw) + RepaintGraphWindow(); - return gtl; + 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 NOW IN LFDEMOD.C void setGraphBuf(uint8_t *buff, size_t size) { - int i=0; + 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; @@ -59,6 +84,7 @@ void setGraphBuf(uint8_t *buff, size_t size) } size_t getFromGraphBuf(uint8_t *buff) { + if (buff == NULL ) return 0; uint32_t i; for (i=0;i127) GraphBuffer[i]=127; //trim @@ -67,46 +93,190 @@ size_t getFromGraphBuf(uint8_t *buff) } return i; } -// Get or auto-detect clock rate -int GetClock(const char *str, int peak, int verbose) + +// 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 - if (!clock) - { - uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; - size_t size = getFromGraphBuf(grph); - clock = DetectASKClock(grph,size,0); - // Only print this message if we're not looping something - if (!verbose){ - PrintAndLog("Auto-detected clock rate: %d", 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; + } + bool st = DetectST(grph, &size, &clock); + int start = 0; + if (st == false) { + 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; +} + +int GetPskClock(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; + } + 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; } -int GetNRZpskClock(const char *str, int peak, int verbose) +uint8_t GetNrzClock(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 - if (!clock) - { - uint8_t grph[MAX_GRAPH_TRACE_LEN]={0}; - size_t size = getFromGraphBuf(grph); - clock = DetectpskNRZClock(grph,size,0); - // Only print this message if we're not looping something - if (!verbose){ - PrintAndLog("Auto-detected clock rate: %d", 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; + } + size_t clkStartIdx = 0; + clock = DetectNRZClock(grph, size, 0, &clkStartIdx); + // 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; + 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 || g_debugMode) 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 || g_debugMode) PrintAndLog("DEBUG: Clock detect error"); + return 0; + } + return 1; +} +bool graphJustNoise(int *BitStream, int size) +{ + static const uint8_t THRESHOLD = 15; //might not be high enough for noisy environments + //test samples are not just noise + bool justNoise1 = 1; + for(int idx=0; idx < size && justNoise1 ;idx++){ + justNoise1 = BitStream[idx] < THRESHOLD; + } + return justNoise1; +}