git.zerfleddert.de Git - proxmark3-svn/blob - client/ui.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
   3 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // UI utilities
  10 //-----------------------------------------------------------------------------
  11
  12 #include <stdarg.h>
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <stdbool.h>
  16 #include <time.h>
  17 #include <readline/readline.h>
  18 #include <pthread.h>
  19 #include "loclass/cipherutils.h"
  20 #include "ui.h"
  21 #include "cmdmain.h"
  22 #include "cmddata.h"
  23 #include "graph.h"
  24 #define M_PI 3.14159265358979323846264338327
  25
  26 double CursorScaleFactor;
  27 int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64;
  28 int offline;
  29 int flushAfterWrite = 0;
  30 extern pthread_mutex_t print_lock;
  31
  32 static char *logfilename = "proxmark3.log";
  33
  34 void PrintAndLog(char *fmt, ...)
  35 {
  36         char *saved_line;
  37         int saved_point;
  38         va_list argptr, argptr2;
  39         static FILE *logfile = NULL;
  40         static int logging = 1;
  41
  42         // lock this section to avoid interlacing prints from different threats
  43         pthread_mutex_lock(&print_lock);
  44
  45         if (logging && !logfile) {
  46                 logfile = fopen(logfilename, "a");
  47                 if (!logfile) {
  48                         fprintf(stderr, "Can't open logfile, logging disabled!\n");
  49                         logging=0;
  50                 }
  51         }
  52
  53         int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
  54
  55         if (need_hack) {
  56                 saved_point = rl_point;
  57                 saved_line = rl_copy_text(0, rl_end);
  58                 rl_save_prompt();
  59                 rl_replace_line("", 0);
  60                 rl_redisplay();
  61         }
  62
  63         va_start(argptr, fmt);
  64         va_copy(argptr2, argptr);
  65         vprintf(fmt, argptr);
  66         printf("          "); // cleaning prompt
  67         va_end(argptr);
  68         printf("\n");
  69
  70         if (need_hack) {
  71                 rl_restore_prompt();
  72                 rl_replace_line(saved_line, 0);
  73                 rl_point = saved_point;
  74                 rl_redisplay();
  75                 free(saved_line);
  76         }
  77
  78         if (logging && logfile) {
  79                 vfprintf(logfile, fmt, argptr2);
  80                 fprintf(logfile,"\n");
  81                 fflush(logfile);
  82         }
  83         va_end(argptr2);
  84
  85         if (flushAfterWrite == 1) {
  86                 fflush(NULL);
  87         }
  88         //release lock
  89         pthread_mutex_unlock(&print_lock);
  90 }
  91
  92 void SetLogFilename(char *fn) {
  93   logfilename = fn;
  94 }
  95
  96 void iceFsk3(int * data, const size_t len){
  97
  98         int i,j;
  99
 100         int * output =  (int* ) malloc(sizeof(int) * len);
 101         memset(output, 0x00, len);
 102         float fc           = 0.1125f;          // center frequency
 103         size_t adjustedLen = len;
 104
 105     // create very simple low-pass filter to remove images (2nd-order Butterworth)
 106     float complex iir_buf[3] = {0,0,0};
 107     float b[3] = {0.003621681514929,  0.007243363029857, 0.003621681514929};
 108     float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
 109
 110     float sample           = 0;      // input sample read from file
 111     float complex x_prime  = 1.0f;   // save sample for estimating frequency
 112     float complex x;
 113
 114         for (i=0; i<adjustedLen; ++i) {
 115
 116                 sample = data[i]+128;
 117
 118         // remove DC offset and mix to complex baseband
 119         x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
 120
 121         // apply low-pass filter, removing spectral image (IIR using direct-form II)
 122         iir_buf[2] = iir_buf[1];
 123         iir_buf[1] = iir_buf[0];
 124         iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
 125         x          = b[0]*iir_buf[0] +
 126                      b[1]*iir_buf[1] +
 127                      b[2]*iir_buf[2];
 128
 129         // compute instantaneous frequency by looking at phase difference
 130         // between adjacent samples
 131         float freq = cargf(x*conjf(x_prime));
 132         x_prime = x;    // retain this sample for next iteration
 133
 134                 output[i] =(freq > 0)? 10 : -10;
 135     }
 136
 137         // show data
 138         for (j=0; j<adjustedLen; ++j)
 139                 data[j] = output[j];
 140
 141         CmdLtrim("30");
 142         adjustedLen -= 30;
 143
 144         // zero crossings.
 145         for (j=0; j<adjustedLen; ++j){
 146                 if ( data[j] == 10) break;
 147         }
 148         int startOne =j;
 149
 150         for (;j<adjustedLen; ++j){
 151                 if ( data[j] == -10 ) break;
 152         }
 153         int stopOne = j-1;
 154
 155         int fieldlen = stopOne-startOne;
 156
 157         fieldlen = (fieldlen == 39 || fieldlen == 41)? 40 : fieldlen;
 158         fieldlen = (fieldlen == 59 || fieldlen == 51)? 50 : fieldlen;
 159         if ( fieldlen != 40 && fieldlen != 50){
 160                 printf("Detected field Length: %d \n", fieldlen);
 161                 printf("Can only handle 40 or 50.  Aborting...\n");
 162                 free(output);
 163                 return;
 164         }
 165
 166         // FSK sequence start == 000111
 167         int startPos = 0;
 168         for (i =0; i<adjustedLen; ++i){
 169                 int dec = 0;
 170                 for ( j = 0; j < 6*fieldlen; ++j){
 171                         dec += data[i + j];
 172                 }
 173                 if (dec == 0) {
 174                         startPos = i;
 175                         break;
 176                 }
 177         }
 178
 179         printf("000111 position: %d \n", startPos);
 180
 181         startPos += 6*fieldlen+5;
 182
 183         int bit =0;
 184         printf("BINARY\n");
 185         printf("R/40 :  ");
 186         for (i =startPos ; i < adjustedLen; i += 40){
 187                 bit = data[i]>0 ? 1:0;
 188                 printf("%d", bit );
 189         }
 190         printf("\n");
 191
 192         printf("R/50 :  ");
 193         for (i =startPos ; i < adjustedLen; i += 50){
 194                 bit = data[i]>0 ? 1:0;
 195                 printf("%d", bit );     }
 196         printf("\n");
 197
 198         free(output);
 199 }
 200
 201 float complex cexpf (float complex Z)
 202 {
 203   float complex  Res;
 204   double rho = exp (__real__ Z);
 205   __real__ Res = rho * cosf(__imag__ Z);
 206   __imag__ Res = rho * sinf(__imag__ Z);
 207   return Res;
 208 }