X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f38a152863a5eb289acb169c5a38b4b77e87956e..5774b2b44d987c1962346582e7ff554e0e53315a:/client/ui.c

diff --git a/client/ui.c b/client/ui.c
index 6486d524..48a55b1f 100644
--- a/client/ui.c
+++ b/client/ui.c
@@ -9,19 +9,11 @@
 // UI utilities
 //-----------------------------------------------------------------------------
 
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <time.h>
-#include <readline/readline.h>
-#include <pthread.h>
-
 #include "ui.h"
-
 double CursorScaleFactor;
 int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64;
 int offline;
-int flushAfterWrite = 0;  //buzzy
+int flushAfterWrite = 0;
 extern pthread_mutex_t print_lock;
 
 static char *logfilename = "proxmark3.log";
@@ -32,13 +24,13 @@ void PrintAndLog(char *fmt, ...)
 	int saved_point;
 	va_list argptr, argptr2;
 	static FILE *logfile = NULL;
-	static int logging=1;
+	static int logging = 1;
 
 	// lock this section to avoid interlacing prints from different threats
 	pthread_mutex_lock(&print_lock);
   
 	if (logging && !logfile) {
-		logfile=fopen(logfilename, "a");
+		logfile = fopen(logfilename, "a");
 		if (!logfile) {
 			fprintf(stderr, "Can't open logfile, logging disabled!\n");
 			logging=0;
@@ -77,208 +69,127 @@ void PrintAndLog(char *fmt, ...)
 	}
 	va_end(argptr2);
 
-	if (flushAfterWrite == 1)  //buzzy
-	{
+	if (flushAfterWrite == 1) {
 		fflush(NULL);
 	}
 	//release lock
 	pthread_mutex_unlock(&print_lock);  
 }
 
-
-void SetLogFilename(char *fn)
-{
+void SetLogFilename(char *fn) {
   logfilename = fn;
 }
+ 
+void iceFsk3(int * data, const size_t len){
 
+	int i,j;
+	
+	int * output =  (int* ) malloc(sizeof(int) * len);	
+	memset(output, 0x00, len);
+	float fc           = 0.1125f;          // center frequency
+	size_t adjustedLen = len;
+	
+    // create very simple low-pass filter to remove images (2nd-order Butterworth)
+    float complex iir_buf[3] = {0,0,0};
+    float b[3] = {0.003621681514929,  0.007243363029857, 0.003621681514929};
+    float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
+    
+    float sample           = 0;      // input sample read from file
+    float complex x_prime  = 1.0f;   // save sample for estimating frequency
+    float complex x;
+		
+	for (i=0; i<adjustedLen; ++i) {
 
-uint8_t manchester_decode(const uint8_t * data, const size_t len, uint8_t * dataout){
+		sample = data[i]+128;
+		
+        // remove DC offset and mix to complex baseband
+        x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
+
+        // apply low-pass filter, removing spectral image (IIR using direct-form II)
+        iir_buf[2] = iir_buf[1];
+        iir_buf[1] = iir_buf[0];
+        iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
+        x          = b[0]*iir_buf[0] +
+                     b[1]*iir_buf[1] +
+                     b[2]*iir_buf[2];
+					 
+        // compute instantaneous frequency by looking at phase difference
+        // between adjacent samples
+        float freq = cargf(x*conjf(x_prime));
+        x_prime = x;    // retain this sample for next iteration
+
+		output[i] =(freq > 0)? 10 : -10;
+    } 
+
+	// show data
+	for (j=0; j<adjustedLen; ++j)
+		data[j] = output[j];
+		
+	CmdLtrim("30");
+	adjustedLen -= 30;
+	
+	// zero crossings.
+	for (j=0; j<adjustedLen; ++j){
+		if ( data[j] == 10) break;
+	}
+	int startOne =j;
 	
-	size_t bytelength = len;
+	for (;j<adjustedLen; ++j){
+		if ( data[j] == -10 ) break;
+	}
+	int stopOne = j-1;
 	
-	uint8_t bitStream[bytelength];
-	memset(bitStream, 0x00, bytelength);
+	int fieldlen = stopOne-startOne;
 	
-	int clock,high, low, bit, hithigh, hitlow, first, bit2idx, lastpeak;
-	int i,invert, lastval;
-	int bitidx = 0;
-	int lc = 0;
-	int warnings = 0;
-	high = 1;
-	low =  bit = bit2idx = lastpeak = invert = lastval = hithigh = hitlow = first = 0;
-	clock = 0xFFFF;
-
-	/* Detect high and lows */
-	for (i = 0; i < bytelength; i++) {
-		if (data[i] > high)
-			high = data[i];
-		else if (data[i] < low)
-			low = data[i];
+	fieldlen = (fieldlen == 39 || fieldlen == 41)? 40 : fieldlen;
+	fieldlen = (fieldlen == 59 || fieldlen == 51)? 50 : fieldlen;
+	if ( fieldlen != 40 && fieldlen != 50){
+		printf("Detected field Length: %d \n", fieldlen);
+		printf("Can only handle 40 or 50.  Aborting...\n");
+		free(output);
+		return;
 	}
 	
-	/* get clock */
-	int j=0;
-	for (i = 1; i < bytelength; i++) {
-		/* if this is the beginning of a peak */
-		j = i-1;
-		if ( data[j] != data[i] && 
-		     data[i] == high)
-		{
-		  /* find lowest difference between peaks */
-			if (lastpeak && i - lastpeak < clock)
-				clock = i - lastpeak;
-			lastpeak = i;
+	// FSK sequence start == 000111
+	int startPos = 0;
+	for (i =0; i<adjustedLen; ++i){
+		int dec = 0;
+		for ( j = 0; j < 6*fieldlen; ++j){
+			dec += data[i + j];
 		}
-	}
-    
-	int tolerance = clock/4;
-	PrintAndLog(" Detected clock: %d",clock);
-
-	/* Detect first transition */
-	  /* Lo-Hi (arbitrary)       */
-	  /* skip to the first high */
-	  for (i= 0; i < bytelength; i++)
-		if (data[i] == high)
-		  break;
-		  
-	  /* now look for the first low */
-	  for (; i < bytelength; i++) {
-		if (data[i] == low) {
-			lastval = i;
+		if (dec == 0) {
+			startPos = i;
 			break;
 		}
-	  }
-	  
-	/* If we're not working with 1/0s, demod based off clock */
-	if (high != 1)
-	{
-		bit = 0; /* We assume the 1st bit is zero, it may not be
-			  * the case: this routine (I think) has an init problem.
-			  * Ed.
-			  */
-		for (; i < (int)(bytelength / clock); i++)
-		{
-		hithigh = 0;
-		hitlow = 0;
-		first = 1;
-
-		/* Find out if we hit both high and low peaks */
-		for (j = 0; j < clock; j++)
-		{
-			if (data[(i * clock) + j] == high)
-				hithigh = 1;
-			else if (data[(i * clock) + j] == low)
-				hitlow = 1;
-
-			/* it doesn't count if it's the first part of our read
-			   because it's really just trailing from the last sequence */
-			if (first && (hithigh || hitlow))
-			  hithigh = hitlow = 0;
-			else
-			  first = 0;
-
-			if (hithigh && hitlow)
-			  break;
-		  }
-
-		  /* If we didn't hit both high and low peaks, we had a bit transition */
-		  if (!hithigh || !hitlow)
-			bit ^= 1;
-
-		  bitStream[bit2idx++] = bit ^ invert;
-		}
 	}
-	/* standard 1/0 bitstream */
-  else {
-		/* Then detect duration between 2 successive transitions */
-		for (bitidx = 1; i < bytelength; i++) {
-		
-			if (data[i-1] != data[i]) {
-				lc = i-lastval;
-				lastval = i;
+	
+	printf("000111 position: %d \n", startPos);
 
-				// Error check: if bitidx becomes too large, we do not
-				// have a Manchester encoded bitstream or the clock is really
-				// wrong!
-				if (bitidx > (bytelength*2/clock+8) ) {
-					PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
-					return 0;
-				}
-				// Then switch depending on lc length:
-				// Tolerance is 1/4 of clock rate (arbitrary)
-				if (abs(lc-clock/2) < tolerance) {
-					// Short pulse : either "1" or "0"
-					bitStream[bitidx++] = data[i-1];
-				} else if (abs(lc-clock) < tolerance) {
-					// Long pulse: either "11" or "00"
-					bitStream[bitidx++] = data[i-1];
-					bitStream[bitidx++] = data[i-1];
-				} else {
-					// Error
-					warnings++;
-					PrintAndLog("Warning: Manchester decode error for pulse width detection.");
-					if (warnings > 10) {
-						PrintAndLog("Error: too many detection errors, aborting.");
-						return 0;
-					}
-				}
-			}
-		}
+	startPos += 6*fieldlen+5;
+	
+	int bit =0;
+	printf("BINARY\n");
+	printf("R/40 :  ");
+	for (i =startPos ; i < adjustedLen; i += 40){
+		bit = data[i]>0 ? 1:0;
+		printf("%d", bit );
 	}
-	// At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
-    // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
-    // to stop output at the final bitidx2 value, not bitidx
-    for (i = 0; i < bitidx; i += 2) {
-		if ((bitStream[i] == 0) && (bitStream[i+1] == 1)) {
-			bitStream[bit2idx++] = 1 ^ invert;
-		} 
-		else if ((bitStream[i] == 1) && (bitStream[i+1] == 0)) {
-			bitStream[bit2idx++] = 0 ^ invert;
-		} 
-		else {
-			// We cannot end up in this state, this means we are unsynchronized,
-			// move up 1 bit:
-			i++;
-			warnings++;
-			PrintAndLog("Unsynchronized, resync...");
-			if (warnings > 10) {
-				PrintAndLog("Error: too many decode errors, aborting.");
-				return 0;
-			}
-		}
-    }
-
-	  // PrintAndLog(" Manchester decoded bitstream : %d bits", (bit2idx-16));
-	  // uint8_t mod = (bit2idx-16) % blocksize;
-	  // uint8_t div = (bit2idx-16) / blocksize;
-	  
-	  // // Now output the bitstream to the scrollback by line of 16 bits
-	  // for (i = 0; i < div*blocksize; i+=blocksize) {
-		// PrintAndLog(" %s", sprint_bin(bitStream+i,blocksize) );
-	  // }
-	  // if ( mod > 0 ){
-		// PrintAndLog(" %s", sprint_bin(bitStream+i, mod) );
-	  // }
+	printf("\n");	
 	
-	if ( bit2idx > 0 )
-		memcpy(dataout, bitStream, bit2idx);
+	printf("R/50 :  ");
+	for (i =startPos ; i < adjustedLen; i += 50){
+		bit = data[i]>0 ? 1:0;
+		printf("%d", bit );	}
+	printf("\n");	
 	
-	free(bitStream);
-	return bit2idx;
+	free(output);
 }
 
-void PrintPaddedManchester( uint8_t* bitStream, size_t len, size_t blocksize){
-
-	  PrintAndLog(" Manchester decoded bitstream : %d bits", len);
-	  
-	  uint8_t mod = len % blocksize;
-	  uint8_t div = len / blocksize;
-	  int i;
-	  // Now output the bitstream to the scrollback by line of 16 bits
-	  for (i = 0; i < div*blocksize; i+=blocksize) {
-		PrintAndLog(" %s", sprint_bin(bitStream+i,blocksize) );
-	  }
-	  if ( mod > 0 ){
-		PrintAndLog(" %s", sprint_bin(bitStream+i, mod) );
-	  }
+float complex cexpf (float complex Z)
+{
+  float complex  Res;
+  double rho = exp (__real__ Z);
+  __real__ Res = rho * cosf(__imag__ Z);
+  __imag__ Res = rho * sinf(__imag__ Z);
+  return Res;
 }