git.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   tcgetattr( 0, &Otty);
  24   Ntty = Otty;
  25
  26   Ntty.c_iflag          = 0;       /* input mode                */
  27   Ntty.c_oflag          = 0;       /* output mode               */
  28   Ntty.c_lflag         &= ~ICANON; /* raw mode */
  29   Ntty.c_cc[VMIN]       = CMIN;    /* minimum time to wait      */
  30   Ntty.c_cc[VTIME]      = CTIME;   /* minimum characters to wait for */
  31
  32   if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
  33     error += ioctl(0, FIONREAD, &cnt);
  34     error += tcsetattr(0, TCSANOW, &Otty);
  35   }
  36
  37   return ( error == 0 ? cnt : -1 );
  38 }
  39
  40 #else
  41 #include <conio.h>
  42 int ukbhit(void) {
  43         return kbhit();
  44 }
  45 #endif
  46
  47 // log files functions
  48 void AddLogLine(char *file, char *extData, char *c) {
  49         FILE *fLog = NULL;
  50     char filename[FILE_PATH_SIZE] = {0x00};
  51     int len = 0;
  52
  53     len = strlen(file);
  54     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
  55     memcpy(filename, file, len);
  56
  57         fLog = fopen(filename, "a");
  58         if (!fLog) {
  59                 printf("Could not append log file %s", filename);
  60                 return;
  61         }
  62
  63         fprintf(fLog, "%s", extData);
  64         fprintf(fLog, "%s\n", c);
  65         fclose(fLog);
  66 }
  67
  68 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
  69         AddLogLine(fileName, extData, sprint_hex(data, len));
  70 }
  71
  72 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
  73   char buf[100] = {0};
  74         sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
  75         AddLogLine(fileName, extData, buf);
  76 }
  77
  78 void AddLogCurrentDT(char *fileName) {
  79         char buff[20];
  80         struct tm *curTime;
  81
  82         time_t now = time(0);
  83         curTime = gmtime(&now);
  84
  85         strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
  86         AddLogLine(fileName, "\nanticollision: ", buff);
  87 }
  88
  89 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
  90         char * fnameptr = fileName;
  91         memset(fileName, 0x00, 200);
  92
  93         for (int j = 0; j < byteCount; j++, fnameptr += 2)
  94                 sprintf(fnameptr, "%02x", uid[j]);
  95         sprintf(fnameptr, "%s", ext);
  96 }
  97
  98 // printing and converting functions
  99
 100 void print_hex(const uint8_t * data, const size_t len)
 101 {
 102         size_t i;
 103
 104         for (i=0; i < len; i++)
 105                 printf("%02x ", data[i]);
 106
 107         printf("\n");
 108 }
 109
 110 char *sprint_hex(const uint8_t *data, const size_t len) {
 111
 112         int maxLen = ( len > 1024/3) ? 1024/3 : len;
 113         static char buf[1024];
 114         memset(buf, 0x00, 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 > 1020) ? 1020 : len;
 127         static char buf[1024];
 128         memset(buf, 0x00, 1024);
 129         char *tmp = buf;
 130
 131         for (size_t i=0; i < maxLen; ++i){
 132                 sprintf(tmp++, "%u", data[i]);
 133                 if (breaks > 0 && !((i+1) % breaks))
 134                         sprintf(tmp++, "%s","\n");
 135         }
 136
 137         return buf;
 138 }
 139
 140 char *sprint_bin(const uint8_t *data, const size_t len) {
 141         return sprint_bin_break(data, len, 0);
 142 }
 143 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 144 {
 145         while (len--) {
 146                 dest[len] = (uint8_t) n;
 147                 n >>= 8;
 148         }
 149 }
 150
 151 uint64_t bytes_to_num(uint8_t* src, size_t len)
 152 {
 153         uint64_t num = 0;
 154         while (len--)
 155         {
 156                 num = (num << 8) | (*src);
 157                 src++;
 158         }
 159         return num;
 160 }
 161
 162 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 163 // to
 164 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 165 // up to 64 bytes or 512 bits
 166 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 167         static uint8_t buf[64];
 168         memset(buf, 0x00, 64);
 169         uint8_t *tmp = buf;
 170         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 171                 for (size_t i = 0; i < blockSize; i++){
 172                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 173                 }
 174         }
 175         return tmp;
 176 }
 177
 178 //assumes little endian
 179 char * printBits(size_t const size, void const * const ptr)
 180 {
 181     unsigned char *b = (unsigned char*) ptr;
 182     unsigned char byte;
 183         static char buf[1024];
 184         char * tmp = buf;
 185     int i, j;
 186
 187     for (i=size-1;i>=0;i--)
 188     {
 189         for (j=7;j>=0;j--)
 190         {
 191             byte = b[i] & (1<<j);
 192             byte >>= j;
 193             sprintf(tmp, "%u", byte);
 194                         tmp++;
 195         }
 196     }
 197         return buf;
 198 }
 199
 200 //  -------------------------------------------------------------------------
 201 //  string parameters lib
 202 //  -------------------------------------------------------------------------
 203
 204 //  -------------------------------------------------------------------------
 205 //  line     - param line
 206 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 207 //  paramnum - param number (from 0)
 208 //  -------------------------------------------------------------------------
 209 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 210 {
 211         int i;
 212         int len = strlen(line);
 213
 214         *bg = 0;
 215         *en = 0;
 216
 217   // skip spaces
 218         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 219         if (*bg >= len) {
 220                 return 1;
 221         }
 222
 223         for (i = 0; i < paramnum; i++) {
 224                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 225                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 226
 227                 if (line[*bg] == '\0') return 1;
 228         }
 229
 230         *en = *bg;
 231         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 232
 233         (*en)--;
 234
 235         return 0;
 236 }
 237
 238
 239 char param_getchar(const char *line, int paramnum)
 240 {
 241         int bg, en;
 242
 243         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 244
 245         return line[bg];
 246 }
 247
 248 uint8_t param_get8(const char *line, int paramnum)
 249 {
 250         return param_get8ex(line, paramnum, 0, 10);
 251 }
 252
 253 /**
 254  * @brief Reads a decimal integer (actually, 0-254, not 255)
 255  * @param line
 256  * @param paramnum
 257  * @return -1 if error
 258  */
 259 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 260 {
 261         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 262         if( (int8_t) val == -1) return 1;
 263         (*destination) = val;
 264         return 0;
 265 }
 266 /**
 267  * @brief Checks if param is decimal
 268  * @param line
 269  * @param paramnum
 270  * @return
 271  */
 272 uint8_t param_isdec(const char *line, int paramnum)
 273 {
 274         int bg, en;
 275         //TODO, check more thorougly
 276         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 277                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 278
 279         return 0;
 280 }
 281
 282 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 283 {
 284         int bg, en;
 285
 286         if (!param_getptr(line, &bg, &en, paramnum))
 287                 return strtoul(&line[bg], NULL, base) & 0xff;
 288         else
 289                 return deflt;
 290 }
 291
 292 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 293 {
 294         int bg, en;
 295
 296         if (!param_getptr(line, &bg, &en, paramnum))
 297                 return strtoul(&line[bg], NULL, base);
 298         else
 299                 return deflt;
 300 }
 301
 302 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 303 {
 304         int bg, en;
 305
 306         if (!param_getptr(line, &bg, &en, paramnum))
 307                 return strtoull(&line[bg], NULL, base);
 308         else
 309                 return deflt;
 310
 311         return 0;
 312 }
 313
 314 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 315 {
 316         int bg, en, temp, i;
 317
 318         if (hexcnt % 2)
 319                 return 1;
 320
 321         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 322
 323         if (en - bg + 1 != hexcnt)
 324                 return 1;
 325
 326         for(i = 0; i < hexcnt; i += 2) {
 327                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 328
 329                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 330                 data[i / 2] = temp & 0xff;
 331         }
 332
 333         return 0;
 334 }
 335 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 336 {
 337         int bg, en, temp, i;
 338
 339         //if (hexcnt % 2)
 340         //      return 1;
 341
 342         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 343
 344         *hexcnt = en - bg + 1;
 345         if (*hexcnt % 2) //error if not complete hex bytes
 346                 return 1;
 347
 348         for(i = 0; i < *hexcnt; i += 2) {
 349                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 350
 351                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 352                 data[i / 2] = temp & 0xff;
 353         }
 354
 355         return 0;
 356 }
 357 int param_getstr(const char *line, int paramnum, char * str)
 358 {
 359         int bg, en;
 360
 361         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 362
 363         memcpy(str, line + bg, en - bg + 1);
 364         str[en - bg + 1] = 0;
 365
 366         return en - bg + 1;
 367 }
 368
 369 /*
 370 The following methods comes from Rfidler sourcecode.
 371 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 372 */
 373
 374 // convert hex to sequence of 0/1 bit values
 375 // returns number of bits converted
 376 int hextobinarray(char *target, char *source)
 377 {
 378     int length, i, count= 0;
 379     char x;
 380
 381     length = strlen(source);
 382     // process 4 bits (1 hex digit) at a time
 383     while(length--)
 384     {
 385         x= *(source++);
 386         // capitalize
 387         if (x >= 'a' && x <= 'f')
 388             x -= 32;
 389         // convert to numeric value
 390         if (x >= '0' && x <= '9')
 391             x -= '0';
 392         else if (x >= 'A' && x <= 'F')
 393             x -= 'A' - 10;
 394         else
 395             return 0;
 396         // output
 397         for(i= 0 ; i < 4 ; ++i, ++count)
 398             *(target++)= (x >> (3 - i)) & 1;
 399     }
 400
 401     return count;
 402 }
 403
 404 // convert hex to human readable binary string
 405 int hextobinstring(char *target, char *source)
 406 {
 407     int length;
 408
 409     if(!(length= hextobinarray(target, source)))
 410         return 0;
 411     binarraytobinstring(target, target, length);
 412     return length;
 413 }
 414
 415 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 416 // return number of bits converted
 417 int binarraytohex(char *target, char *source, int length)
 418 {
 419     unsigned char i, x;
 420     int j = length;
 421
 422     if(j % 4)
 423         return 0;
 424
 425     while(j)
 426     {
 427         for(i= x= 0 ; i < 4 ; ++i)
 428             x +=  ( source[i] << (3 - i));
 429         sprintf(target,"%X", x);
 430         ++target;
 431         source += 4;
 432         j -= 4;
 433     }
 434     return length;
 435 }
 436
 437 // convert binary array to human readable binary
 438 void binarraytobinstring(char *target, char *source,  int length)
 439 {
 440     int i;
 441
 442     for(i= 0 ; i < length ; ++i)
 443         *(target++)= *(source++) + '0';
 444     *target= '\0';
 445 }
 446
 447 // return parity bit required to match type
 448 uint8_t GetParity( char *bits, uint8_t type, int length)
 449 {
 450     int x;
 451
 452     for(x= 0 ; length > 0 ; --length)
 453         x += bits[length - 1];
 454     x %= 2;
 455
 456     return x ^ type;
 457 }
 458
 459 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 460 void wiegand_add_parity(char *target, char *source, char length)
 461 {
 462     *(target++)= GetParity(source, EVEN, length / 2);
 463     memcpy(target, source, length);
 464     target += length;
 465     *(target)= GetParity(source + length / 2, ODD, length / 2);
 466 }
 467
 468 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 469    for( ; len > 0; len--,dst++,src++)
 470        *dst ^= *src;
 471 }
 472
 473 int32_t le24toh (uint8_t data[3]) {
 474     return (data[2] << 16) | (data[1] << 8) | data[0];
 475 }
 476
 477
 478 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 479
 480         int i = start;
 481         int j = len-1;
 482
 483         if (len > 32) return 0;
 484
 485         uint32_t tmp = 0;
 486         for (; j >= 0; --j, ++i)
 487                 tmp     |= bits[i] << j;
 488
 489         return tmp;
 490 }