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https://github.com/Proxmark/proxmark3.git
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270 lines
6.6 KiB
C
270 lines
6.6 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Graph utilities
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//-----------------------------------------------------------------------------
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include "ui.h"
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#include "graph.h"
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#include "lfdemod.h"
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int GraphBuffer[MAX_GRAPH_TRACE_LEN];
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int GraphTraceLen;
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/* write a manchester bit to the graph */
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void AppendGraph(int redraw, int clock, int bit)
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{
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int i;
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//set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
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for (i = 0; i < (int)(clock / 2); ++i)
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GraphBuffer[GraphTraceLen++] = bit ;
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//set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
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for (i = (int)(clock / 2); i < clock; ++i)
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GraphBuffer[GraphTraceLen++] = bit ^ 1;
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if (redraw)
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RepaintGraphWindow();
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}
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// clear out our graph window
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int ClearGraph(int redraw)
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{
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int gtl = GraphTraceLen;
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memset(GraphBuffer, 0x00, GraphTraceLen);
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GraphTraceLen = 0;
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if (redraw)
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RepaintGraphWindow();
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return gtl;
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}
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// option '1' to save GraphBuffer any other to restore
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void save_restoreGB(uint8_t saveOpt)
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{
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static int SavedGB[MAX_GRAPH_TRACE_LEN];
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static int SavedGBlen;
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static bool GB_Saved = false;
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if (saveOpt==1) { //save
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memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
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SavedGBlen = GraphTraceLen;
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GB_Saved=true;
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} else if (GB_Saved){ //restore
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memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
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GraphTraceLen = SavedGBlen;
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RepaintGraphWindow();
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}
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return;
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}
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// DETECT CLOCK NOW IN LFDEMOD.C
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void setGraphBuf(uint8_t *buff, size_t size)
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{
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if ( buff == NULL ) return;
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uint16_t i = 0;
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if ( size > MAX_GRAPH_TRACE_LEN )
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size = MAX_GRAPH_TRACE_LEN;
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ClearGraph(0);
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for (; i < size; ++i){
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GraphBuffer[i]=buff[i]-128;
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}
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GraphTraceLen=size;
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RepaintGraphWindow();
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return;
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}
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size_t getFromGraphBuf(uint8_t *buff)
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{
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if (buff == NULL ) return 0;
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uint32_t i;
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for (i=0;i<GraphTraceLen;++i){
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if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
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if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
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buff[i]=(uint8_t)(GraphBuffer[i]+128);
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}
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return i;
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}
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// A simple test to see if there is any data inside Graphbuffer.
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bool HasGraphData(){
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if ( GraphTraceLen <= 0) {
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PrintAndLog("No data available, try reading something first");
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return false;
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}
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return true;
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}
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// Detect high and lows in Grapbuffer.
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// Only loops the first 256 values.
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void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
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uint8_t loopMax = 255;
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if ( loopMax > GraphTraceLen)
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loopMax = GraphTraceLen;
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for (uint8_t i = 0; i < loopMax; ++i) {
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if (GraphBuffer[i] > *high)
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*high = GraphBuffer[i];
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else if (GraphBuffer[i] < *low)
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*low = GraphBuffer[i];
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}
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//12% fuzz in case highs and lows aren't clipped
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if (addFuzz) {
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*high = (int)(*high * .88);
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*low = (int)(*low * .88);
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}
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}
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// Get or auto-detect ask clock rate
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int GetAskClock(const char str[], bool printAns, bool verbose)
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{
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int clock;
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sscanf(str, "%i", &clock);
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if (!strcmp(str, ""))
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clock = 0;
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if (clock != 0)
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return clock;
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// Auto-detect clock
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uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(grph);
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if (size == 0) {
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if (verbose)
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PrintAndLog("Failed to copy from graphbuffer");
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return -1;
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}
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bool st = DetectST(grph, &size, &clock);
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int start = 0;
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if (st == false) {
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start = DetectASKClock(grph, size, &clock, 20);
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}
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// Only print this message if we're not looping something
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if (printAns) {
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PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
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}
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return clock;
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}
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uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
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{
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uint8_t carrier=0;
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uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(grph);
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if ( size == 0 ) {
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if (verbose)
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PrintAndLog("Failed to copy from graphbuffer");
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return 0;
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}
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//uint8_t countPSK_FC(uint8_t *BitStream, size_t size)
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carrier = countFC(grph,size,0);
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// Only print this message if we're not looping something
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if (printAns){
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PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
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}
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return carrier;
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}
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int GetPskClock(const char str[], bool printAns, bool verbose)
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{
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int clock;
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sscanf(str, "%i", &clock);
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if (!strcmp(str, ""))
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clock = 0;
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if (clock!=0)
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return clock;
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// Auto-detect clock
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uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(grph);
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if ( size == 0 ) {
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if (verbose)
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PrintAndLog("Failed to copy from graphbuffer");
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return -1;
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}
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clock = DetectPSKClock(grph,size,0);
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// Only print this message if we're not looping something
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if (printAns){
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PrintAndLog("Auto-detected clock rate: %d", clock);
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}
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return clock;
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}
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uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
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{
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int clock;
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sscanf(str, "%i", &clock);
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if (!strcmp(str, ""))
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clock = 0;
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if (clock!=0)
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return clock;
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// Auto-detect clock
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uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(grph);
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if ( size == 0 ) {
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if (verbose)
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PrintAndLog("Failed to copy from graphbuffer");
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return -1;
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}
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clock = DetectNRZClock(grph, size, 0);
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// Only print this message if we're not looping something
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if (printAns){
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PrintAndLog("Auto-detected clock rate: %d", clock);
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}
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return clock;
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}
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//by marshmellow
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//attempt to detect the field clock and bit clock for FSK
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uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
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{
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int clock;
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sscanf(str, "%i", &clock);
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if (!strcmp(str, ""))
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clock = 0;
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if (clock != 0) return (uint8_t)clock;
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uint8_t fc1=0, fc2=0, rf1=0;
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uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
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if (ans == 0) return 0;
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if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
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if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
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return rf1;
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}
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if (verbose){
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PrintAndLog("DEBUG: unknown fsk field clock detected");
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PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
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}
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return 0;
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}
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uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
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{
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uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(BitStream);
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if (size==0) return 0;
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uint16_t ans = countFC(BitStream, size, 1);
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if (ans==0) {
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if (verbose) PrintAndLog("DEBUG: No data found");
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return 0;
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}
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*fc1 = (ans >> 8) & 0xFF;
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*fc2 = ans & 0xFF;
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*rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
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if (*rf1==0) {
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if (verbose) PrintAndLog("DEBUG: Clock detect error");
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return 0;
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}
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return 1;
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}
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