X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7fe9b0b742d7dae9c5af1d292d11840b5c3cbfae..905c55de2bbe642412b47ed4e92344096c817fac:/client/graph.c diff --git a/client/graph.c b/client/graph.c index 4a966676..76210562 100644 --- a/client/graph.c +++ b/client/graph.c @@ -1,85 +1,282 @@ +//----------------------------------------------------------------------------- +// Copyright (C) 2010 iZsh +// +// This code is licensed to you under the terms of the GNU GPL, version 2 or, +// at your option, any later version. See the LICENSE.txt file for the text of +// the license. +//----------------------------------------------------------------------------- +// Graph utilities +//----------------------------------------------------------------------------- + #include +#include #include #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; + 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; + + if (redraw) + RepaintGraphWindow(); +} + +// clear out our graph window +int ClearGraph(int redraw) +{ + int gtl = GraphTraceLen; + memset(GraphBuffer, 0x00, GraphTraceLen); + GraphTraceLen = 0; + if (redraw) + RepaintGraphWindow(); + 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) +{ + if ( buff == NULL ) return; + + ClearGraph(0); + + if ( size > MAX_GRAPH_TRACE_LEN ) + size = MAX_GRAPH_TRACE_LEN; + + for (uint16_t i = 0; 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; +} - for (i = 0; i < (int)(clock / 2); ++i) - GraphBuffer[GraphTraceLen++] = bit ^ 1; +// 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 (i = (int)(clock / 2); i < clock; ++i) - GraphBuffer[GraphTraceLen++] = bit; + 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; + } + bool st = DetectST(grph, &size, &clock); + int start = 0; + if (st == false) + start = DetectASKClock(grph, size, &clock, 20); - if (redraw) - RepaintGraphWindow(); + if (printAns) + PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start); + SetGraphClock(clock, start); + return clock; } -/* clear out our graph window */ -int ClearGraph(int redraw) +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; + } + 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 gtl = GraphTraceLen; - GraphTraceLen = 0; + int clock; + sscanf(str, "%i", &clock); + if (!strcmp(str, "")) + clock = 0; - if (redraw) - RepaintGraphWindow(); + 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 = 0; + clock = DetectPSKClock_ext(grph, size, 0, &start); - return gtl; + if (printAns) + PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start); + + SetGraphClock(clock, start); + return clock; } -/* - * Detect clock rate - */ -int DetectClock(int peak) +uint8_t GetNrzClock(const char str[], bool printAns, bool verbose) { - 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]; - - 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; + 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 = 0; + clock = DetectNRZClock_ext(grph, size, 0, &start); + // Only print this message if we're not looping something + if (printAns) + PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start); + + SetGraphClock(clock, start); + 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; + + int start = 0; + *rf1 = detectFSKClk_ext(BitStream, size, *fc1, *fc2, &start); + if (*rf1 == 0) { + if (verbose || g_debugMode) PrintAndLog("DEBUG: Clock detect error"); + return 0; + } + if (verbose || g_debugMode) + PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d | Best Starting Position: %d", *fc1, *fc2, *rf1, start); + SetGraphClock(*rf1, start); + return 1; } -/* Get or auto-detect clock rate */ -int GetClock(const char *str, int peak, int verbose) +// test samples are not just noise +bool graphJustNoise(int *BitStream, int size) { - int clock; - - sscanf(str, "%i", &clock); - if (!strcmp(str, "")) - clock = 0; - - /* Auto-detect clock */ - if (!clock) - { - clock = DetectClock(peak); - /* Only print this message if we're not looping something */ - if (!verbose) - PrintAndLog("Auto-detected clock rate: %d", clock); - } - - return clock; + //might not be high enough for noisy environments + #define THRESHOLD 15; + bool isNoise = TRUE; + for(int i=0; i < size && isNoise; i++){ + isNoise = BitStream[i] < THRESHOLD; + } + return isNoise; }