#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
+#include <stdbool.h>
#include <time.h>
#include <readline/readline.h>
#include <pthread.h>
-
+#include "loclass/cipherutils.h"
#include "ui.h"
+#include "cmdmain.h"
+#include "cmddata.h"
+#include "graph.h"
+#define M_PI 3.14159265358979323846264338327
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";
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;
}
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;
}
-
-
-int manchester_decode(const int * data, const size_t len, uint8_t * dataout){
-
- int bitlength = 0;
- int i, clock, high, low, startindex;
- low = startindex = 0;
- high = 1;
- uint8_t bitStream[len];
-
- memset(bitStream, 0x00, len);
-
- /* Detect high and lows */
- for (i = 0; i < len; i++) {
- if (data[i] > high)
- high = data[i];
- else if (data[i] < low)
- low = data[i];
+
+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) {
+
+ 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;
- /* get clock */
- clock = GetT55x7Clock( data, len, high );
- startindex = DetectFirstTransition(data, len, high, low);
-
- PrintAndLog(" Clock : %d", clock);
- PrintAndLog(" startindex : %d", startindex);
-
- if (high != 1)
- bitlength = ManchesterConvertFrom255(data, len, bitStream, high, low, clock, startindex);
- else
- bitlength= ManchesterConvertFrom1(data, len, bitStream, clock, startindex);
-
- if ( bitlength > 0 ){
- PrintPaddedManchester(bitStream, bitlength, clock);
+ for (;j<adjustedLen; ++j){
+ if ( data[j] == -10 ) break;
}
-
- memcpy(dataout, bitStream, bitlength);
+ int stopOne = j-1;
- free(bitStream);
- return bitlength;
-}
-
- int GetT55x7Clock( const int * data, const size_t len, int peak ){
-
- int i,lastpeak,clock;
- clock = 0xFFFF;
- lastpeak = 0;
+ int fieldlen = stopOne-startOne;
- /* Detect peak if we don't have one */
- if (!peak) {
- for (i = 0; i < len; ++i) {
- if (data[i] > peak) {
- peak = 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;
}
- for (i = 1; i < len; ++i) {
- /* if this is the beginning of a peak */
- if ( data[i-1] != data[i] && data[i] == peak) {
- /* 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];
}
- }
- //return clock;
- //defaults clock to precise values.
- switch(clock){
- case 8:
- case 16:
- case 32:
- case 40:
- case 50:
- case 64:
- case 100:
- case 128:
- return clock;
- break;
- default: break;
- }
- return 32;
- }
-
- int DetectFirstTransition(const int * data, const size_t len, int high, int low){
-
- int i, retval;
- retval = 0;
- /*
- Detect first transition Lo-Hi (arbitrary)
- skip to the first high
- */
- for (i = 0; i < len; ++i)
- if (data[i] == high)
- break;
-
- /* now look for the first low */
- for (; i < len; ++i) {
- if (data[i] == low) {
- retval = i;
+ if (dec == 0) {
+ startPos = i;
break;
}
- }
- return retval;
- }
-
- int ManchesterConvertFrom255(const int * data, const size_t len, uint8_t * dataout, int high, int low, int clock, int startIndex){
-
- int i, j, hithigh, hitlow, first, bit, bitIndex;
- i = startIndex;
- bitIndex = 0;
-
- /*
- * We assume the 1st bit is zero, it may not be
- * the case: this routine (I think) has an init problem.
- * Ed.
- */
- bit = 0;
-
- for (; i < (int)(len / 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;
-
- dataout[bitIndex++] = bit;
}
- return bitIndex;
- }
-
- int ManchesterConvertFrom1(const int * data, const size_t len, uint8_t * dataout, int clock, int startIndex){
-
- int i,j, bitindex, lc, tolerance, warnings;
- warnings = 0;
- int upperlimit = len*2/clock+8;
- i = startIndex;
- j = 0;
- tolerance = clock/4;
- uint8_t decodedArr[len];
- /* Then detect duration between 2 successive transitions */
- for (bitindex = 1; i < len; i++) {
-
- if (data[i-1] != data[i]) {
- lc = i - startIndex;
- startIndex = i;
+ printf("000111 position: %d \n", startPos);
- // Error check: if bitindex becomes too large, we do not
- // have a Manchester encoded bitstream or the clock is really wrong!
- if (bitindex > upperlimit ) {
- 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"
- decodedArr[bitindex++] = data[i-1];
- } else if (abs(lc-clock) < tolerance) {
- // Long pulse: either "11" or "00"
- decodedArr[bitindex++] = data[i-1];
- decodedArr[bitindex++] = data[i-1];
- } else {
- ++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;
- /*
- * We have a decodedArr of "01" ("1") or "10" ("0")
- * parse it into final decoded dataout
- */
- for (i = 0; i < bitindex; i += 2) {
-
- if ((decodedArr[i] == 0) && (decodedArr[i+1] == 1)) {
- dataout[j++] = 1;
- } else if ((decodedArr[i] == 1) && (decodedArr[i+1] == 0)) {
- dataout[j++] = 0;
- } else {
- i++;
- warnings++;
- PrintAndLog("Unsynchronized, resync...");
- PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
-
- if (warnings > 10) {
- PrintAndLog("Error: too many decode errors, aborting.");
- return 0;
- }
- }
- }
-
- PrintAndLog("%s", sprint_hex(dataout, j));
- return j;
- }
-
- void ManchesterDiffDecodedString(const uint8_t* bitstream, size_t len, uint8_t invert){
- /*
- * We have a bitstream of "01" ("1") or "10" ("0")
- * parse it into final decoded bitstream
- */
- int i, j, warnings;
- uint8_t decodedArr[(len/2)+1];
-
- j = warnings = 0;
-
- uint8_t lastbit = 0;
-
- for (i = 0; i < len; i += 2) {
+ 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 );
+ }
+ printf("\n");
- uint8_t first = bitstream[i];
- uint8_t second = bitstream[i+1];
-
- if ( first == second ) {
- ++i;
- ++warnings;
- if (warnings > 10) {
- PrintAndLog("Error: too many decode errors, aborting.");
- return;
- }
- }
- else if ( lastbit != first ) {
- decodedArr[j++] = 0 ^ invert;
- }
- else {
- decodedArr[j++] = 1 ^ invert;
- }
- lastbit = second;
- }
+ printf("R/50 : ");
+ for (i =startPos ; i < adjustedLen; i += 50){
+ bit = data[i]>0 ? 1:0;
+ printf("%d", bit ); }
+ printf("\n");
- PrintAndLog("%s", sprint_hex(decodedArr, j));
+ 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;
}
projects / proxmark3-svn / blobdiff