X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0e74c023bd73e4516652f1656794a2edc2b12abc..905c55de2bbe642412b47ed4e92344096c817fac:/client/graph.c

diff --git a/client/graph.c b/client/graph.c
index 18ff972a..76210562 100644
--- a/client/graph.c
+++ b/client/graph.c
@@ -9,165 +9,274 @@
 //-----------------------------------------------------------------------------
 
 #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;
-
-  for (i = 0; i < (int)(clock / 2); ++i)
-    GraphBuffer[GraphTraceLen++] = bit ^ 1;
-  
-  for (i = (int)(clock / 2); i < clock; ++i)
-    GraphBuffer[GraphTraceLen++] = 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 ;
+	//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();
+	if (redraw)
+		RepaintGraphWindow();
 }
 
-/* clear out our graph window */
+// clear out our graph window
 int ClearGraph(int redraw)
 {
-  int gtl = GraphTraceLen;
-  GraphTraceLen = 0;
+	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;	
+}
+
+// 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 (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;
+	}
+	bool st = DetectST(grph, &size, &clock);
+	int start = 0;
+	if (st == false)
+		start = DetectASKClock(grph, size, &clock, 20);
 
-  return gtl;
+	if (printAns)
+		PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
+	SetGraphClock(clock, start);
+	return clock;
 }
 
-/*
- * Detect clock rate
- */
- //decommissioned - has difficulty detecting rf/32 and only works if data is manchester encoded
-/*
-int DetectClock2(int peak)
+uint8_t GetPskCarrier(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];
-
- // 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;
+	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 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 = DetectPSKClock_ext(grph, size, 0,  &start);
+
+	if (printAns)
+		PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
+	
+	SetGraphClock(clock, start);
+	return clock;
 }
-*/
 
-// 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)
+uint8_t GetNrzClock(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;
+	}
+	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;
-//  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;
+	//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;
 }