X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f6c18637ca504d2eea0bc3accaabddd132d749fb..62577a62ae4726ed57a8d6d1e65ce8c1a2c77211:/client/ui.c diff --git a/client/ui.c b/client/ui.c index b4e85575..cfaec6a5 100644 --- a/client/ui.c +++ b/client/ui.c @@ -9,20 +9,11 @@ // UI utilities //----------------------------------------------------------------------------- -#include -#include -#include -#include -#include -#include -#include #include "ui.h" -#include "loclass/cipherutils.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"; @@ -33,13 +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; @@ -78,321 +69,96 @@ 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; } - -int manchester_decode( 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]; - } - - /* get clock */ - clock = GetT55x7Clock( data, len, high ); - startindex = DetectFirstTransition(data, len, high); - - 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); - - memcpy(dataout, bitStream, bitlength); - - free(bitStream); - return bitlength; -} - - int GetT55x7Clock( const int * data, const size_t len, int peak ){ - int i,lastpeak,clock; - clock = 0xFFFF; - lastpeak = 0; - - /* Detect peak if we don't have one */ - if (!peak) { - for (i = 0; i < len; ++i) { - if (data[i] > peak) { - peak = data[i]; - } - } - } - - 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; - } - } - //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; - } - - PrintAndLog(" Found Clock : %d - trying to adjust", clock); - - // When detected clock is 31 or 33 then then return - int clockmod = clock%8; - if ( clockmod == 7 ) - clock += 1; - else if ( clockmod == 1 ) - clock -= 1; - - return clock; - } - - int DetectFirstTransition(const int * data, const size_t len, int threshold){ +void iceIIR_Butterworth(int *data, const size_t len){ - int i =0; - /* now look for the first threshold */ - for (; i < len; ++i) { - if (data[i] == threshold) { - break; - } - } - return i; - } - - int ManchesterConvertFrom255(const int * data, const size_t len, uint8_t * dataout, int high, int low, int clock, int startIndex){ - - int i, j, z, hithigh, hitlow, bitIndex, startType; - i = 0; - bitIndex = 0; + int i,j; - int isDamp = 0; - int damplimit = (int)((high / 2) * 0.3); - int dampHi = (high/2)+damplimit; - int dampLow = (high/2)-damplimit; - int firstST = 0; - - // i = clock frame of data - for (; i < (int)(len / clock); i++) - { - hithigh = 0; - hitlow = 0; - startType = -1; - z = startIndex + (i*clock); - isDamp = 0; - + int * output = (int* ) malloc(sizeof(int) * len); + if ( !output ) return; + + // clear mem + memset(output, 0x00, len); - /* Find out if we hit both high and low peaks */ - for (j = 0; j < clock; j++) - { - if (data[z+j] == high){ - hithigh = 1; - if ( startType == -1) - startType = 1; - } - - if (data[z+j] == low ){ - hitlow = 1; - if ( startType == -1) - startType = 0; - } + size_t adjustedLen = len; + float fc = 0.1125f; // center frequency - if (hithigh && hitlow) - break; - } + // 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 array + float complex x_prime = 1.0f; // save sample for estimating frequency + float complex x; - // No high value found, are we in a dampening field? - if ( !hithigh ) { - //PrintAndLog(" # Entering damp test at index : %d (%d)", z+j, j); - for (j = 0; j < clock/2; j++) - { - if ( - (data[z+j] <= dampHi && data[z+j] >= dampLow) - ){ - isDamp = 1; - } - else - isDamp = 0; - } - } + for (i = 0; i < adjustedLen; ++i) { - /* Manchester Switching.. - 0: High -> Low - 1: Low -> High - */ - if (startType == 0) - dataout[bitIndex++] = 1; - else if (startType == 1) - dataout[bitIndex++] = 0; - else - dataout[bitIndex++] = 2; - - if ( isDamp ) { - firstST++; - } + sample = data[i]; - if ( firstST == 4) - break; - } - return bitIndex; - } - - int ManchesterConvertFrom1(const int * data, const size_t len, uint8_t * dataout, int clock, int startIndex){ + // 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) ? 127 : -127; + } + + // show data + //memcpy(data, output, adjustedLen); + for (j=0; j 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; - } - } - } - } - - /* - * We have a decodedArr of "01" ("1") or "10" ("0") - * parse it into final decoded dataout - */ - for (i = 0; i < bitindex; i += 2) { + int32_t filter_reg = 0; + int16_t input, output; + int8_t shift = (k <=8 ) ? k : FILTER_SHIFT; - 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)"); + for (int i = 0; i < len; ++i){ - 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) { - - uint8_t first = bitstream[i]; - uint8_t second = bitstream[i+1]; + input = data[i]; + // Update filter with current sample + filter_reg = filter_reg - (filter_reg >> shift) + input; - 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; - } - - PrintAndLog("%s", sprint_hex(decodedArr, j)); + // Scale output for unity gain + output = filter_reg >> shift; + data[i] = output; + } } - -void PrintPaddedManchester( uint8_t* bitStream, size_t len, size_t blocksize){ - PrintAndLog(" Manchester decoded : %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) ); -} \ No newline at end of file +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; +}