[proxmark3-svn] / client / graph.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// 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 <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 manchester bit to the graph */
void AppendGraph(int redraw, int clock, int 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();
}

// 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;
	
	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;
	}
	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 (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;
}
Commit	Line	Data
a553f267	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// Graph utilities
	9	//-----------------------------------------------------------------------------
	10
7fe9b0b7	11	#include <stdio.h>
a1557c4c	12	#include <stdbool.h>
7fe9b0b7	13	#include <string.h>
	14	#include "ui.h"
	15	#include "graph.h"
d5a72d2f	16	#include "lfdemod.h"
7fe9b0b7	17
	18	int GraphBuffer[MAX_GRAPH_TRACE_LEN];
	19	int GraphTraceLen;
abd6112f	20	/* write a manchester bit to the graph */
7fe9b0b7	21	void AppendGraph(int redraw, int clock, int bit)
	22	{
	23	int i;
abd6112f	24	//set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
7fe9b0b7	25	for (i = 0; i < (int)(clock / 2); ++i)
78f5b1a7	26	GraphBuffer[GraphTraceLen++] = bit ;
abd6112f	27	//set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
7fe9b0b7	28	for (i = (int)(clock / 2); i < clock; ++i)
78f5b1a7	29	GraphBuffer[GraphTraceLen++] = bit ^ 1;
7fe9b0b7	30
	31	if (redraw)
	32	RepaintGraphWindow();
	33	}
	34
c12512e9	35	// clear out our graph window
7fe9b0b7	36	int ClearGraph(int redraw)
	37	{
	38	int gtl = GraphTraceLen;
52ab55ab	39	memset(GraphBuffer, 0x00, GraphTraceLen);
52ab55ab	40
7fe9b0b7	41	GraphTraceLen = 0;
	42
	43	if (redraw)
	44	RepaintGraphWindow();
	45
	46	return gtl;
	47	}
23f0a7d8	48	// option '1' to save GraphBuffer any other to restore
	49	void save_restoreGB(uint8_t saveOpt)
	50	{
	51	static int SavedGB[MAX_GRAPH_TRACE_LEN];
	52	static int SavedGBlen;
	53	static bool GB_Saved = false;
	54
	55	if (saveOpt==1) { //save
2767fc02	56	memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
23f0a7d8	57	SavedGBlen = GraphTraceLen;
23f0a7d8	58	GB_Saved=true;
49bbc60a	59	} else if (GB_Saved){ //restore
2767fc02	60	memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
23f0a7d8	61	GraphTraceLen = SavedGBlen;
49bbc60a	62	RepaintGraphWindow();
23f0a7d8	63	}
	64	return;
	65	}
7fe9b0b7	66
c12512e9	67	// DETECT CLOCK NOW IN LFDEMOD.C
7fe9b0b7	68
ba1a299c	69	void setGraphBuf(uint8_t *buff, size_t size)
d5a72d2f	70	{
a1557c4c	71	if ( buff == NULL ) return;
	72
	73	uint16_t i = 0;
	74	if ( size > MAX_GRAPH_TRACE_LEN )
	75	size = MAX_GRAPH_TRACE_LEN;
b4fb11ba	76	ClearGraph(0);
b4fb11ba	77	for (; i < size; ++i){
ba1a299c	78	GraphBuffer[i]=buff[i]-128;
b4fb11ba	79	}
	80	GraphTraceLen=size;
	81	RepaintGraphWindow();
	82	return;
d5a72d2f	83	}
ba1a299c	84	size_t getFromGraphBuf(uint8_t *buff)
d5a72d2f	85	{
e770c648	86	if (buff == NULL ) return 0;
b4fb11ba	87	uint32_t i;
	88	for (i=0;i<GraphTraceLen;++i){
	89	if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
	90	if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
	91	buff[i]=(uint8_t)(GraphBuffer[i]+128);
	92	}
	93	return i;
d5a72d2f	94	}
ec75f5c1	95
a1557c4c	96	// A simple test to see if there is any data inside Graphbuffer.
a1557c4c	97	bool HasGraphData(){
7fe9b0b7	98
a1557c4c	99	if ( GraphTraceLen <= 0) {
	100	PrintAndLog("No data available, try reading something first");
	101	return false;
	102	}
	103	return true;
	104	}
	105
	106	// Detect high and lows in Grapbuffer.
	107	// Only loops the first 256 values.
	108	void DetectHighLowInGraph(int high, int low, bool addFuzz) {
	109
	110	uint8_t loopMax = 255;
	111	if ( loopMax > GraphTraceLen)
	112	loopMax = GraphTraceLen;
	113
	114	for (uint8_t i = 0; i < loopMax; ++i) {
	115	if (GraphBuffer[i] > *high)
	116	*high = GraphBuffer[i];
	117	else if (GraphBuffer[i] < *low)
	118	*low = GraphBuffer[i];
	119	}
	120
	121	//12% fuzz in case highs and lows aren't clipped
	122	if (addFuzz) {
	123	high = (int)(high * .88);
	124	low = (int)(low * .88);
	125	}
7fe9b0b7	126	}
ba1a299c	127
f3bf15e4	128	// Get or auto-detect ask clock rate
f3bf15e4	129	int GetAskClock(const char str[], bool printAns, bool verbose)
e770c648	130	{
	131	int clock;
	132	sscanf(str, "%i", &clock);
	133	if (!strcmp(str, ""))
	134	clock = 0;
	135
f3bf15e4	136	if (clock != 0)
f3bf15e4	137	return clock;
e770c648	138	// Auto-detect clock
f3bf15e4	139	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	140	size_t size = getFromGraphBuf(grph);
	141	if (size == 0) {
	142	if (verbose)
e770c648	143	PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4	144	return -1;
f3bf15e4	145	}
c0f15a05	146	bool st = DetectST(grph, &size, &clock);
	147	int start = 0;
	148	if (st == false) {
	149	start = DetectASKClock(grph, size, &clock, 20);
	150	}
f3bf15e4	151	// Only print this message if we're not looping something
f3bf15e4	152	if (printAns){
fef74fdc	153	PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
e770c648	154	}
	155	return clock;
	156	}
	157
872e3d4d	158	uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
	159	{
	160	uint8_t carrier=0;
	161	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	162	size_t size = getFromGraphBuf(grph);
	163	if ( size == 0 ) {
	164	if (verbose)
	165	PrintAndLog("Failed to copy from graphbuffer");
	166	return 0;
	167	}
	168	//uint8_t countPSK_FC(uint8_t *BitStream, size_t size)
	169
2eec55c8	170	carrier = countFC(grph,size,0);
872e3d4d	171	// Only print this message if we're not looping something
	172	if (printAns){
	173	PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
	174	}
	175	return carrier;
	176	}
	177
f3bf15e4	178	int GetPskClock(const char str[], bool printAns, bool verbose)
	179	{
	180	int clock;
	181	sscanf(str, "%i", &clock);
	182	if (!strcmp(str, ""))
	183	clock = 0;
	184
1a4b9073	185	if (clock!=0) return clock;
f3bf15e4	186	// Auto-detect clock
	187	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	188	size_t size = getFromGraphBuf(grph);
	189	if ( size == 0 ) {
1a4b9073	190	if (verbose) PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4	191	return -1;
	192	}
	193	clock = DetectPSKClock(grph,size,0);
	194	// Only print this message if we're not looping something
1a4b9073	195	if (printAns) PrintAndLog("Auto-detected clock rate: %d", clock);
1a4b9073	196
f3bf15e4	197	return clock;
	198	}
	199
	200	uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
4118b74d	201	{
ba1a299c	202	int clock;
ba1a299c	203	sscanf(str, "%i", &clock);
	204	if (!strcmp(str, ""))
	205	clock = 0;
	206
f3bf15e4	207	if (clock!=0)
f3bf15e4	208	return clock;
ba1a299c	209	// Auto-detect clock
f3bf15e4	210	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	211	size_t size = getFromGraphBuf(grph);
	212	if ( size == 0 ) {
	213	if (verbose)
e629181f	214	PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4	215	return -1;
	216	}
	217	clock = DetectNRZClock(grph, size, 0);
	218	// Only print this message if we're not looping something
	219	if (printAns){
	220	PrintAndLog("Auto-detected clock rate: %d", clock);
ba1a299c	221	}
ba1a299c	222	return clock;
4118b74d	223	}
f3bf15e4	224	//by marshmellow
	225	//attempt to detect the field clock and bit clock for FSK
	226	uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
	227	{
	228	int clock;
	229	sscanf(str, "%i", &clock);
	230	if (!strcmp(str, ""))
	231	clock = 0;
	232	if (clock != 0) return (uint8_t)clock;
	233
abd6112f	234
	235	uint8_t fc1=0, fc2=0, rf1=0;
	236	uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
	237	if (ans == 0) return 0;
	238	if ((fc1==10 && fc2==8) \|\| (fc1==8 && fc2==5)){
	239	if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
	240	return rf1;
	241	}
	242	if (verbose){
	243	PrintAndLog("DEBUG: unknown fsk field clock detected");
	244	PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
	245	}
	246	return 0;
	247	}
	248	uint8_t fskClocks(uint8_t fc1, uint8_t fc2, uint8_t *rf1, bool verbose)
	249	{
f3bf15e4	250	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	251	size_t size = getFromGraphBuf(BitStream);
	252	if (size==0) return 0;
2eec55c8	253	uint16_t ans = countFC(BitStream, size, 1);
f3bf15e4	254	if (ans==0) {
1a4b9073	255	if (verbose \|\| g_debugMode) PrintAndLog("DEBUG: No data found");
f3bf15e4	256	return 0;
f3bf15e4	257	}
abd6112f	258	*fc1 = (ans >> 8) & 0xFF;
abd6112f	259	*fc2 = ans & 0xFF;
f3bf15e4	260
abd6112f	261	rf1 = detectFSKClk(BitStream, size, fc1, *fc2);
abd6112f	262	if (*rf1==0) {
1a4b9073	263	if (verbose \|\| g_debugMode) PrintAndLog("DEBUG: Clock detect error");
f3bf15e4	264	return 0;
f3bf15e4	265	}
abd6112f	266	return 1;
f3bf15e4	267	}
3f84d473	268
	269	// test samples are not just noise
	270	bool graphJustNoise(int *BitStream, int size)
	271	{
	272	//might not be high enough for noisy environments
	273	#define THRESHOLD 15;
	274
	275	bool isNoise = TRUE;
	276	for(int i=0; i < size && isNoise; i++){
	277	isNoise = BitStream[i] < THRESHOLD;
	278	}
	279	return isNoise;
	280	}