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 #define MAX_BIN_BREAK_LENGTH   (3072+384+1)
  13
  14 #ifndef _WIN32
  15 #include <termios.h>
  16 #include <sys/ioctl.h>
  17
  18 int ukbhit(void)
  19 {
  20   int cnt = 0;
  21   int error;
  22   static struct termios Otty, Ntty;
  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         memset(buf, 0x00, 1024);
 116         char * tmp = buf;
 117         size_t i;
 118
 119         for (i=0; i < maxLen; ++i, tmp += 3)
 120                 sprintf(tmp, "%02X ", data[i]);
 121
 122         return buf;
 123 }
 124
 125 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 126         // make sure we don't go beyond our char array memory
 127         int max_len;
 128         if (breaks==0)
 129                 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
 130         else
 131                 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 132
 133         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 134         //clear memory
 135         memset(buf, 0x00, sizeof(buf));
 136         char *tmp = buf;
 137
 138         size_t in_index = 0;
 139         // loop through the out_index to make sure we don't go too far
 140         for (size_t out_index=0; out_index < max_len; out_index++) {
 141                 // set character
 142                 sprintf(tmp++, "%u", data[in_index]);
 143                 // check if a line break is needed
 144                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 145                         // increment and print line break
 146                         out_index++;
 147                         sprintf(tmp++, "%s","\n");
 148         }
 149                 in_index++;
 150         }
 151
 152         return buf;
 153 }
 154
 155 char *sprint_bin(const uint8_t *data, const size_t len) {
 156         return sprint_bin_break(data, len, 0);
 157 }
 158
 159 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
 160         static char buf[1024];
 161         memset(buf, 0x00, 1024);
 162         char *tmp = buf;
 163         sprintf(tmp, "%s| %s", sprint_hex(data, len) , data);
 164         return buf;
 165 }
 166 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 167 {
 168         while (len--) {
 169                 dest[len] = (uint8_t) n;
 170                 n >>= 8;
 171         }
 172 }
 173
 174 uint64_t bytes_to_num(uint8_t* src, size_t len)
 175 {
 176         uint64_t num = 0;
 177         while (len--)
 178         {
 179                 num = (num << 8) | (*src);
 180                 src++;
 181         }
 182         return num;
 183 }
 184
 185 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 186         while (len--) {
 187                 dest[len] = n & 1;
 188                 n >>= 1;
 189         }
 190 }
 191
 192 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 193 // to
 194 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 195 // up to 64 bytes or 512 bits
 196 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 197         static uint8_t buf[64];
 198         //uint8_t buf[64];
 199         memset(buf, 0x00, 64);
 200         uint8_t *tmp = buf;
 201         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 202                 for (size_t i = 0; i < blockSize; i++){
 203                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 204                 }
 205         }
 206         return tmp;
 207 }
 208
 209 //  -------------------------------------------------------------------------
 210 //  string parameters lib
 211 //  -------------------------------------------------------------------------
 212
 213 //  -------------------------------------------------------------------------
 214 //  line     - param line
 215 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 216 //  paramnum - param number (from 0)
 217 //  -------------------------------------------------------------------------
 218 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 219 {
 220         int i;
 221         int len = strlen(line);
 222
 223         *bg = 0;
 224         *en = 0;
 225
 226   // skip spaces
 227         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 228         if (*bg >= len) {
 229                 return 1;
 230         }
 231
 232         for (i = 0; i < paramnum; i++) {
 233                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 234                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 235
 236                 if (line[*bg] == '\0') return 1;
 237         }
 238
 239         *en = *bg;
 240         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 241
 242         (*en)--;
 243
 244         return 0;
 245 }
 246
 247
 248 char param_getchar(const char *line, int paramnum)
 249 {
 250         int bg, en;
 251
 252         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 253
 254         return line[bg];
 255 }
 256
 257 uint8_t param_get8(const char *line, int paramnum)
 258 {
 259         return param_get8ex(line, paramnum, 0, 10);
 260 }
 261
 262 /**
 263  * @brief Reads a decimal integer (actually, 0-254, not 255)
 264  * @param line
 265  * @param paramnum
 266  * @return -1 if error
 267  */
 268 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 269 {
 270         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 271         if( (int8_t) val == -1) return 1;
 272         (*destination) = val;
 273         return 0;
 274 }
 275 /**
 276  * @brief Checks if param is decimal
 277  * @param line
 278  * @param paramnum
 279  * @return
 280  */
 281 uint8_t param_isdec(const char *line, int paramnum)
 282 {
 283         int bg, en;
 284         //TODO, check more thorougly
 285         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 286                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 287
 288         return 0;
 289 }
 290
 291 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 292 {
 293         int bg, en;
 294
 295         if (!param_getptr(line, &bg, &en, paramnum))
 296                 return strtoul(&line[bg], NULL, base) & 0xff;
 297         else
 298                 return deflt;
 299 }
 300
 301 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 302 {
 303         int bg, en;
 304
 305         if (!param_getptr(line, &bg, &en, paramnum))
 306                 return strtoul(&line[bg], NULL, base);
 307         else
 308                 return deflt;
 309 }
 310
 311 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 312 {
 313         int bg, en;
 314
 315         if (!param_getptr(line, &bg, &en, paramnum))
 316                 return strtoull(&line[bg], NULL, base);
 317         else
 318                 return deflt;
 319
 320         return 0;
 321 }
 322
 323 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 324 {
 325         int bg, en, temp, i;
 326
 327         if (hexcnt & 1) return 1;
 328
 329         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 330
 331         if (en - bg + 1 != hexcnt) 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 }