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 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 163         while (len--) {
 164                 dest[len] = n & 1;
 165                 n >>= 1;
 166         }
 167 }
 168
 169 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 170 // to
 171 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 172 // up to 64 bytes or 512 bits
 173 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 174         static uint8_t buf[64];
 175         memset(buf, 0x00, 64);
 176         uint8_t *tmp = buf;
 177         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 178                 for (size_t i = 0; i < blockSize; i++){
 179                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 180                 }
 181         }
 182         return tmp;
 183 }
 184
 185 //assumes little endian
 186 char * printBits(size_t const size, void const * const ptr)
 187 {
 188     unsigned char *b = (unsigned char*) ptr;
 189     unsigned char byte;
 190         static char buf[1024];
 191         char * tmp = buf;
 192     int i, j;
 193
 194     for (i=size-1;i>=0;i--)
 195     {
 196         for (j=7;j>=0;j--)
 197         {
 198             byte = b[i] & (1<<j);
 199             byte >>= j;
 200             sprintf(tmp, "%u", byte);
 201                         tmp++;
 202         }
 203     }
 204         return buf;
 205 }
 206
 207 //  -------------------------------------------------------------------------
 208 //  string parameters lib
 209 //  -------------------------------------------------------------------------
 210
 211 //  -------------------------------------------------------------------------
 212 //  line     - param line
 213 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 214 //  paramnum - param number (from 0)
 215 //  -------------------------------------------------------------------------
 216 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 217 {
 218         int i;
 219         int len = strlen(line);
 220
 221         *bg = 0;
 222         *en = 0;
 223
 224   // skip spaces
 225         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 226         if (*bg >= len) {
 227                 return 1;
 228         }
 229
 230         for (i = 0; i < paramnum; i++) {
 231                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 232                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 233
 234                 if (line[*bg] == '\0') return 1;
 235         }
 236
 237         *en = *bg;
 238         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 239
 240         (*en)--;
 241
 242         return 0;
 243 }
 244
 245
 246 char param_getchar(const char *line, int paramnum)
 247 {
 248         int bg, en;
 249
 250         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 251
 252         return line[bg];
 253 }
 254
 255 uint8_t param_get8(const char *line, int paramnum)
 256 {
 257         return param_get8ex(line, paramnum, 0, 10);
 258 }
 259
 260 /**
 261  * @brief Reads a decimal integer (actually, 0-254, not 255)
 262  * @param line
 263  * @param paramnum
 264  * @return -1 if error
 265  */
 266 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 267 {
 268         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 269         if( (int8_t) val == -1) return 1;
 270         (*destination) = val;
 271         return 0;
 272 }
 273 /**
 274  * @brief Checks if param is decimal
 275  * @param line
 276  * @param paramnum
 277  * @return
 278  */
 279 uint8_t param_isdec(const char *line, int paramnum)
 280 {
 281         int bg, en;
 282         //TODO, check more thorougly
 283         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 284                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 285
 286         return 0;
 287 }
 288
 289 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 290 {
 291         int bg, en;
 292
 293         if (!param_getptr(line, &bg, &en, paramnum))
 294                 return strtoul(&line[bg], NULL, base) & 0xff;
 295         else
 296                 return deflt;
 297 }
 298
 299 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 300 {
 301         int bg, en;
 302
 303         if (!param_getptr(line, &bg, &en, paramnum))
 304                 return strtoul(&line[bg], NULL, base);
 305         else
 306                 return deflt;
 307 }
 308
 309 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 310 {
 311         int bg, en;
 312
 313         if (!param_getptr(line, &bg, &en, paramnum))
 314                 return strtoull(&line[bg], NULL, base);
 315         else
 316                 return deflt;
 317
 318         return 0;
 319 }
 320
 321 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 322 {
 323         int bg, en, temp, i;
 324
 325         if (hexcnt % 2)
 326                 return 1;
 327
 328         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 329
 330         if (en - bg + 1 != hexcnt)
 331                 return 1;
 332
 333         for(i = 0; i < hexcnt; i += 2) {
 334                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 335
 336                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 337                 data[i / 2] = temp & 0xff;
 338         }
 339
 340         return 0;
 341 }
 342 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 343 {
 344         int bg, en, temp, i;
 345
 346         //if (hexcnt % 2)
 347         //      return 1;
 348
 349         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 350
 351         *hexcnt = en - bg + 1;
 352         if (*hexcnt % 2) //error if not complete hex bytes
 353                 return 1;
 354
 355         for(i = 0; i < *hexcnt; i += 2) {
 356                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 357
 358                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 359                 data[i / 2] = temp & 0xff;
 360         }
 361
 362         return 0;
 363 }
 364 int param_getstr(const char *line, int paramnum, char * str)
 365 {
 366         int bg, en;
 367
 368         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 369
 370         memcpy(str, line + bg, en - bg + 1);
 371         str[en - bg + 1] = 0;
 372
 373         return en - bg + 1;
 374 }
 375
 376 /*
 377 The following methods comes from Rfidler sourcecode.
 378 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 379 */
 380
 381 // convert hex to sequence of 0/1 bit values
 382 // returns number of bits converted
 383 int hextobinarray(char *target, char *source)
 384 {
 385     int length, i, count= 0;
 386     char x;
 387
 388     length = strlen(source);
 389     // process 4 bits (1 hex digit) at a time
 390     while(length--)
 391     {
 392         x= *(source++);
 393         // capitalize
 394         if (x >= 'a' && x <= 'f')
 395             x -= 32;
 396         // convert to numeric value
 397         if (x >= '0' && x <= '9')
 398             x -= '0';
 399         else if (x >= 'A' && x <= 'F')
 400             x -= 'A' - 10;
 401         else
 402             return 0;
 403         // output
 404         for(i= 0 ; i < 4 ; ++i, ++count)
 405             *(target++)= (x >> (3 - i)) & 1;
 406     }
 407
 408     return count;
 409 }
 410
 411 // convert hex to human readable binary string
 412 int hextobinstring(char *target, char *source)
 413 {
 414     int length;
 415
 416     if(!(length= hextobinarray(target, source)))
 417         return 0;
 418     binarraytobinstring(target, target, length);
 419     return length;
 420 }
 421
 422 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 423 // return number of bits converted
 424 int binarraytohex(char *target, char *source, int length)
 425 {
 426     unsigned char i, x;
 427     int j = length;
 428
 429     if(j % 4)
 430         return 0;
 431
 432     while(j)
 433     {
 434         for(i= x= 0 ; i < 4 ; ++i)
 435             x +=  ( source[i] << (3 - i));
 436         sprintf(target,"%X", x);
 437         ++target;
 438         source += 4;
 439         j -= 4;
 440     }
 441     return length;
 442 }
 443
 444 // convert binary array to human readable binary
 445 void binarraytobinstring(char *target, char *source,  int length)
 446 {
 447     int i;
 448
 449     for(i= 0 ; i < length ; ++i)
 450         *(target++)= *(source++) + '0';
 451     *target= '\0';
 452 }
 453
 454 // return parity bit required to match type
 455 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 456 {
 457     int x;
 458
 459     for(x= 0 ; length > 0 ; --length)
 460         x += bits[length - 1];
 461     x %= 2;
 462
 463     return x ^ type;
 464 }
 465
 466 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 467 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 468 {
 469     *(target++)= GetParity(source, EVEN, length / 2);
 470     memcpy(target, source, length);
 471     target += length;
 472     *(target)= GetParity(source + length / 2, ODD, length / 2);
 473 }
 474
 475 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 476    for( ; len > 0; len--,dst++,src++)
 477        *dst ^= *src;
 478 }
 479
 480 int32_t le24toh (uint8_t data[3]) {
 481     return (data[2] << 16) | (data[1] << 8) | data[0];
 482 }
 483
 484 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 485
 486         if (len > 32) return 0;
 487
 488         int i = start;
 489         int j = len-1;
 490         uint32_t tmp = 0;
 491
 492         for (; j >= 0; --j, ++i)
 493                 tmp     |= bits[i] << j;
 494
 495         return tmp;
 496 }
 497
 498 // RotateLeft - Ultralight, Desfire
 499 void rol(uint8_t *data, const size_t len){
 500     uint8_t first = data[0];
 501     for (size_t i = 0; i < len-1; i++) {
 502         data[i] = data[i+1];
 503     }
 504     data[len-1] = first;
 505 }