X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/8d0a3e87d7d2350f4a05698a42f57625e460e5d6..d24026ade8d48d5bce892f5baf20f79a3ec35aba:/client/graph.c

diff --git a/client/graph.c b/client/graph.c
index d0f6fe74..4c132420 100644
--- a/client/graph.c
+++ b/client/graph.c
@@ -17,39 +17,56 @@
 
 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 half = (int)(clock/2);
-  int firstbit = bit ^ 1;
- 
-  for (i = 0; i < half; ++i)
-    GraphBuffer[GraphTraceLen++] = firstbit;
-  
-  for (i = 0; i <= half; ++i)
-    GraphBuffer[GraphTraceLen++] = bit;
+  //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 */
+// 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, int size) 
+void setGraphBuf(uint8_t *buff, size_t size)
 {
 	if ( buff == NULL ) return;
 	
@@ -58,58 +75,23 @@ void SetGraphBuf(uint8_t *buff, int size)
 		size = MAX_GRAPH_TRACE_LEN;
 	ClearGraph(0);
 	for (; i < size; ++i){
-		GraphBuffer[i] = buff[i];
+		GraphBuffer[i]=buff[i]-128;
 	}
-	GraphTraceLen = size;
+	GraphTraceLen=size;
 	RepaintGraphWindow();
 	return;
 }
-
-// Copies grahpbuff to buff. 
-// while triming values to the range -127 -- 127.
-int GetFromGraphBuf(uint8_t *buff)
+size_t getFromGraphBuf(uint8_t *buff)
 {
-	if ( buff == NULL ) return -1;
-	uint32_t i = 0;
-	
-	for (; i < GraphTraceLen; ++i){
-	
-		// trim upper and lower values.
-		if (GraphBuffer[i] > 127) 
-			GraphBuffer[i] = 127;
-		else if (GraphBuffer[i] < -127)
-			GraphBuffer[i] = -127;
-			
-		buff[i] = (uint8_t)(GraphBuffer[i] + 128);
+	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;
 }
-/* Get or auto-detect clock rate */
-int GetClock(const char *str, int verbose)
-{
-	int clock;
-
-	sscanf(str, "%i", &clock);
-	if (!strcmp(str, ""))
-		clock = 0;
-
-	/* Auto-detect clock */
-	if (!clock) {
-
-		uint8_t grph[MAX_GRAPH_TRACE_LEN] = {0x00};
-		int size = GetFromGraphBuf(grph);
-		if ( size < 0 ) {
-			PrintAndLog("Failed to copy from graphbuffer");
-			return -1;
-		}
-		clock = DetectASKClock(grph, size, 0);
-
-		/* Only print this message if we're not looping something */
-		if (verbose)
-			PrintAndLog("Auto-detected clock rate: %d", clock);
-		}
-	return clock;
-}
 
 // A simple test to see if there is any data inside Graphbuffer. 
 bool HasGraphData(){
@@ -141,4 +123,158 @@ void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
 		*high = (int)(*high * .88);
 		*low  = (int)(*low  * .88);
 	}
-}
\ No newline at end of file
+}
+
+// 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);
+	}
+	// 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;
+}
+
+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
+	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;
+	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;
+}
+
+// test samples are not just noise
+bool graphJustNoise(int *BitStream, int size)
+{
+	//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;
+}