cvs.zerfleddert.de Git - proxmark3-svn/blob - client/util.c

   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 // utilities
   9 //-----------------------------------------------------------------------------
  10
  11 #include "util.h"
  12
  13 #ifndef _WIN32
  14 #include <termios.h>
  15 #include <sys/ioctl.h>
  16
  17 int ukbhit(void)
  18 {
  19   int cnt = 0;
  20   int error;
  21   static struct termios Otty, Ntty;
  22
  23
  24   tcgetattr( 0, &Otty);
  25   Ntty = Otty;
  26
  27   Ntty.c_iflag          = 0;       /* input mode                */
  28   Ntty.c_oflag          = 0;       /* output mode               */
  29   Ntty.c_lflag         &= ~ICANON; /* raw mode */
  30   Ntty.c_cc[VMIN]       = CMIN;    /* minimum time to wait      */
  31   Ntty.c_cc[VTIME]      = CTIME;   /* minimum characters to wait for */
  32
  33   if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
  34     error += ioctl(0, FIONREAD, &cnt);
  35     error += tcsetattr(0, TCSANOW, &Otty);
  36   }
  37
  38   return ( error == 0 ? cnt : -1 );
  39 }
  40
  41 #else
  42 #include <conio.h>
  43 int ukbhit(void) {
  44         return kbhit();
  45 }
  46 #endif
  47
  48 // log files functions
  49 void AddLogLine(char *file, char *extData, char *c) {
  50         FILE *fLog = NULL;
  51     char filename[FILE_PATH_SIZE] = {0x00};
  52     int len = 0;
  53
  54     len = strlen(file);
  55     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
  56     memcpy(filename, file, len);
  57
  58         fLog = fopen(filename, "a");
  59         if (!fLog) {
  60                 printf("Could not append log file %s", filename);
  61                 return;
  62         }
  63
  64         fprintf(fLog, "%s", extData);
  65         fprintf(fLog, "%s\n", c);
  66         fclose(fLog);
  67 }
  68
  69 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
  70         AddLogLine(fileName, extData, sprint_hex(data, len));
  71 }
  72
  73 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
  74   char buf[100] = {0};
  75         sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
  76         AddLogLine(fileName, extData, buf);
  77 }
  78
  79 void AddLogCurrentDT(char *fileName) {
  80         char buff[20];
  81         struct tm *curTime;
  82
  83         time_t now = time(0);
  84         curTime = gmtime(&now);
  85
  86         strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
  87         AddLogLine(fileName, "\nanticollision: ", buff);
  88 }
  89
  90 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
  91         char * fnameptr = fileName;
  92         memset(fileName, 0x00, 200);
  93
  94         for (int j = 0; j < byteCount; j++, fnameptr += 2)
  95                 sprintf(fnameptr, "%02x", uid[j]);
  96         sprintf(fnameptr, "%s", ext);
  97 }
  98
  99 // printing and converting functions
 100
 101 void print_hex(const uint8_t * data, const size_t len)
 102 {
 103         size_t i;
 104
 105         for (i=0; i < len; i++)
 106                 printf("%02x ", data[i]);
 107
 108         printf("\n");
 109 }
 110
 111 char * sprint_hex(const uint8_t * data, const size_t len) {
 112
 113         int maxLen = ( len > 1024/3) ? 1024/3 : len;
 114         static char buf[1024];
 115         char * tmp = buf;
 116         size_t i;
 117
 118         for (i=0; i < maxLen; ++i, tmp += 3)
 119                 sprintf(tmp, "%02x ", data[i]);
 120
 121         return buf;
 122 }
 123
 124 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 125
 126         int maxLen = ( len > 1024) ? 1024 : len;
 127         static char buf[1024];
 128         char *tmp = buf;
 129
 130         for (size_t i=0; i < maxLen; ++i){
 131                 sprintf(tmp++, "%u", data[i]);
 132                 if (breaks > 0 && !((i+1) % breaks))
 133                         sprintf(tmp++, "%s","\n");
 134         }
 135
 136         return buf;
 137 }
 138
 139 char *sprint_bin(const uint8_t *data, const size_t len) {
 140         return sprint_bin_break(data, len, 0);
 141 }
 142 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 143 {
 144         while (len--) {
 145                 dest[len] = (uint8_t) n;
 146                 n >>= 8;
 147         }
 148 }
 149
 150 uint64_t bytes_to_num(uint8_t* src, size_t len)
 151 {
 152         uint64_t num = 0;
 153         while (len--)
 154         {
 155                 num = (num << 8) | (*src);
 156                 src++;
 157         }
 158         return num;
 159 }
 160
 161 //assumes little endian
 162 char * printBits(size_t const size, void const * const ptr)
 163 {
 164     unsigned char *b = (unsigned char*) ptr;
 165     unsigned char byte;
 166         static char buf[1024];
 167         char * tmp = buf;
 168     int i, j;
 169
 170     for (i=size-1;i>=0;i--)
 171     {
 172         for (j=7;j>=0;j--)
 173         {
 174             byte = b[i] & (1<<j);
 175             byte >>= j;
 176             sprintf(tmp, "%u", byte);
 177                         tmp++;
 178         }
 179     }
 180         return buf;
 181 }
 182
 183 //  -------------------------------------------------------------------------
 184 //  string parameters lib
 185 //  -------------------------------------------------------------------------
 186
 187 //  -------------------------------------------------------------------------
 188 //  line     - param line
 189 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 190 //  paramnum - param number (from 0)
 191 //  -------------------------------------------------------------------------
 192 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 193 {
 194         int i;
 195         int len = strlen(line);
 196
 197         *bg = 0;
 198         *en = 0;
 199
 200   // skip spaces
 201         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 202         if (*bg >= len) {
 203                 return 1;
 204         }
 205
 206         for (i = 0; i < paramnum; i++) {
 207                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 208                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 209
 210                 if (line[*bg] == '\0') return 1;
 211         }
 212
 213         *en = *bg;
 214         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 215
 216         (*en)--;
 217
 218         return 0;
 219 }
 220
 221
 222 char param_getchar(const char *line, int paramnum)
 223 {
 224         int bg, en;
 225
 226         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 227
 228         return line[bg];
 229 }
 230
 231 uint8_t param_get8(const char *line, int paramnum)
 232 {
 233         return param_get8ex(line, paramnum, 10, 0);
 234 }
 235
 236 /**
 237  * @brief Reads a decimal integer (actually, 0-254, not 255)
 238  * @param line
 239  * @param paramnum
 240  * @return -1 if error
 241  */
 242 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 243 {
 244         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 245         if( (int8_t) val == -1) return 1;
 246         (*destination) = val;
 247         return 0;
 248 }
 249 /**
 250  * @brief Checks if param is decimal
 251  * @param line
 252  * @param paramnum
 253  * @return
 254  */
 255 uint8_t param_isdec(const char *line, int paramnum)
 256 {
 257         int bg, en;
 258         //TODO, check more thorougly
 259         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 260                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 261
 262         return 0;
 263 }
 264
 265 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 266 {
 267         int bg, en;
 268
 269         if (!param_getptr(line, &bg, &en, paramnum))
 270                 return strtoul(&line[bg], NULL, base) & 0xff;
 271         else
 272                 return deflt;
 273 }
 274
 275 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 276 {
 277         int bg, en;
 278
 279         if (!param_getptr(line, &bg, &en, paramnum))
 280                 return strtoul(&line[bg], NULL, base);
 281         else
 282                 return deflt;
 283 }
 284
 285 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 286 {
 287         int bg, en;
 288
 289         if (!param_getptr(line, &bg, &en, paramnum))
 290                 return strtoull(&line[bg], NULL, base);
 291         else
 292                 return deflt;
 293
 294         return 0;
 295 }
 296
 297 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 298 {
 299         int bg, en, temp, i;
 300
 301         if (hexcnt % 2)
 302                 return 1;
 303
 304         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 305
 306         if (en - bg + 1 != hexcnt)
 307                 return 1;
 308
 309         for(i = 0; i < hexcnt; i += 2) {
 310                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 311
 312                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 313                 data[i / 2] = temp & 0xff;
 314         }
 315
 316         return 0;
 317 }
 318
 319 int param_getstr(const char *line, int paramnum, char * str)
 320 {
 321         int bg, en;
 322
 323         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 324
 325         memcpy(str, line + bg, en - bg + 1);
 326         str[en - bg + 1] = 0;
 327
 328         return en - bg + 1;
 329 }
 330
 331 /*
 332 The following methods comes from Rfidler sourcecode.
 333 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 334 */
 335
 336 // convert hex to sequence of 0/1 bit values
 337 // returns number of bits converted
 338 int hextobinarray(char *target, char *source)
 339 {
 340     int length, i, count= 0;
 341     char x;
 342
 343     length = strlen(source);
 344     // process 4 bits (1 hex digit) at a time
 345     while(length--)
 346     {
 347         x= *(source++);
 348         // capitalize
 349         if (x >= 'a' && x <= 'f')
 350             x -= 32;
 351         // convert to numeric value
 352         if (x >= '0' && x <= '9')
 353             x -= '0';
 354         else if (x >= 'A' && x <= 'F')
 355             x -= 'A' - 10;
 356         else
 357             return 0;
 358         // output
 359         for(i= 0 ; i < 4 ; ++i, ++count)
 360             *(target++)= (x >> (3 - i)) & 1;
 361     }
 362
 363     return count;
 364 }
 365
 366 // convert hex to human readable binary string
 367 int hextobinstring(char *target, char *source)
 368 {
 369     int length;
 370
 371     if(!(length= hextobinarray(target, source)))
 372         return 0;
 373     binarraytobinstring(target, target, length);
 374     return length;
 375 }
 376
 377 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 378 // return number of bits converted
 379 int binarraytohex(char *target, char *source, int length)
 380 {
 381     unsigned char i, x;
 382     int j = length;
 383
 384     if(j % 4)
 385         return 0;
 386
 387     while(j)
 388     {
 389         for(i= x= 0 ; i < 4 ; ++i)
 390             x +=  ( source[i] << (3 - i));
 391         sprintf(target,"%X", x);
 392         ++target;
 393         source += 4;
 394         j -= 4;
 395     }
 396     return length;
 397 }
 398
 399 // convert binary array to human readable binary
 400 void binarraytobinstring(char *target, char *source,  int length)
 401 {
 402     int i;
 403
 404     for(i= 0 ; i < length ; ++i)
 405         *(target++)= *(source++) + '0';
 406     *target= '\0';
 407 }
 408
 409 // return parity bit required to match type
 410 uint8_t GetParity( char *bits, uint8_t type, int length)
 411 {
 412     int x;
 413
 414     for(x= 0 ; length > 0 ; --length)
 415         x += bits[length - 1];
 416     x %= 2;
 417
 418     return x ^ type;
 419 }
 420
 421 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 422 void wiegand_add_parity(char *target, char *source, char length)
 423 {
 424     *(target++)= GetParity(source, EVEN, length / 2);
 425     memcpy(target, source, length);
 426     target += length;
 427     *(target)= GetParity(source + length / 2, ODD, length / 2);
 428 }