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   if ( tcgetattr( 0, &Otty) == -1) return -1;
  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 void print_hex(const uint8_t * data, const size_t len) {
 101         size_t i;
 102         for (i=0; i < len; ++i)
 103                 printf("%02x ", data[i]);
 104         printf("\n");
 105 }
 106 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
 107
 108         int rownum = 0;
 109         printf("[%02d] | ", rownum);
 110         for (int i = 0; i < len; ++i) {
 111
 112                 printf("%02X ", data[i]);
 113
 114                 // check if a line break is needed
 115                 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
 116                         ++rownum;
 117                         printf("\n[%02d] | ", rownum);
 118                 }
 119         }
 120         printf("\n");
 121 }
 122
 123 char *sprint_hex(const uint8_t *data, const size_t len) {
 124
 125         int maxLen = ( len > 1024/3) ? 1024/3 : len;
 126         static char buf[1024];
 127         memset(buf, 0x00, 1024);
 128         char * tmp = buf;
 129         size_t i;
 130
 131         for (i=0; i < maxLen; ++i, tmp += 3)
 132                 sprintf(tmp, "%02X ", data[i]);
 133
 134         return buf;
 135 }
 136
 137 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 138         // make sure we don't go beyond our char array memory
 139         int max_len;
 140         if (breaks==0)
 141                 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
 142         else
 143                 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 144
 145         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 146         //clear memory
 147         memset(buf, 0x00, sizeof(buf));
 148         char *tmp = buf;
 149
 150         size_t in_index = 0;
 151         // loop through the out_index to make sure we don't go too far
 152         for (size_t out_index=0; out_index < max_len-2; out_index++) {
 153                 // set character
 154                 sprintf(tmp++, "%u", data[in_index]);
 155                 // check if a line break is needed and we have room to print it in our array
 156                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 157                         // increment and print line break
 158                         out_index++;
 159                         sprintf(tmp++, "%s","\n");
 160         }
 161                 in_index++;
 162         }
 163
 164         return buf;
 165 }
 166
 167 char *sprint_bin(const uint8_t *data, const size_t len) {
 168         return sprint_bin_break(data, len, 0);
 169 }
 170
 171 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
 172         static char buf[1024];
 173         char *tmp = buf;
 174         memset(buf, 0x00, 1024);
 175         size_t max_len = (len > 1010) ? 1010 : len;
 176         sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
 177         return buf;
 178 }
 179 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 180 {
 181         while (len--) {
 182                 dest[len] = (uint8_t) n;
 183                 n >>= 8;
 184         }
 185 }
 186
 187 uint64_t bytes_to_num(uint8_t* src, size_t len)
 188 {
 189         uint64_t num = 0;
 190         while (len--)
 191         {
 192                 num = (num << 8) | (*src);
 193                 src++;
 194         }
 195         return num;
 196 }
 197
 198 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 199         while (len--) {
 200                 dest[len] = n & 1;
 201                 n >>= 1;
 202         }
 203 }
 204
 205 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 206 // to
 207 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 208 // up to 64 bytes or 512 bits
 209 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 210         uint8_t buf[64];
 211         memset(buf, 0x00, 64);
 212         uint8_t *tmp = buf;
 213         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 214                 for (size_t i = 0; i < blockSize; i++){
 215                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 216                 }
 217         }
 218         return tmp;
 219 }
 220
 221 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
 222         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 223                 for (size_t i = 0; i < blockSize; i++){
 224                         dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 225                 }
 226         }
 227 }
 228
 229
 230 //  -------------------------------------------------------------------------
 231 //  string parameters lib
 232 //  -------------------------------------------------------------------------
 233
 234 //  -------------------------------------------------------------------------
 235 //  line     - param line
 236 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 237 //  paramnum - param number (from 0)
 238 //  -------------------------------------------------------------------------
 239 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 240 {
 241         int i;
 242         int len = strlen(line);
 243
 244         *bg = 0;
 245         *en = 0;
 246
 247   // skip spaces
 248         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 249         if (*bg >= len) {
 250                 return 1;
 251         }
 252
 253         for (i = 0; i < paramnum; i++) {
 254                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 255                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 256
 257                 if (line[*bg] == '\0') return 1;
 258         }
 259
 260         *en = *bg;
 261         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 262
 263         (*en)--;
 264
 265         return 0;
 266 }
 267
 268
 269 char param_getchar(const char *line, int paramnum)
 270 {
 271         int bg, en;
 272
 273         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 274
 275         return line[bg];
 276 }
 277
 278 uint8_t param_get8(const char *line, int paramnum)
 279 {
 280         return param_get8ex(line, paramnum, 0, 10);
 281 }
 282
 283 /**
 284  * @brief Reads a decimal integer (actually, 0-254, not 255)
 285  * @param line
 286  * @param paramnum
 287  * @return -1 if error
 288  */
 289 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 290 {
 291         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 292         if( (int8_t) val == -1) return 1;
 293         (*destination) = val;
 294         return 0;
 295 }
 296 /**
 297  * @brief Checks if param is decimal
 298  * @param line
 299  * @param paramnum
 300  * @return
 301  */
 302 uint8_t param_isdec(const char *line, int paramnum)
 303 {
 304         int bg, en;
 305         //TODO, check more thorougly
 306         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 307                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 308
 309         return 0;
 310 }
 311
 312 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 313 {
 314         int bg, en;
 315
 316         if (!param_getptr(line, &bg, &en, paramnum))
 317                 return strtoul(&line[bg], NULL, base) & 0xff;
 318         else
 319                 return deflt;
 320 }
 321
 322 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 323 {
 324         int bg, en;
 325
 326         if (!param_getptr(line, &bg, &en, paramnum))
 327                 return strtoul(&line[bg], NULL, base);
 328         else
 329                 return deflt;
 330 }
 331
 332 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 333 {
 334         int bg, en;
 335
 336         if (!param_getptr(line, &bg, &en, paramnum))
 337                 return strtoull(&line[bg], NULL, base);
 338         else
 339                 return deflt;
 340
 341         return 0;
 342 }
 343
 344 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 345 {
 346         int bg, en, temp, i;
 347
 348         if (hexcnt & 1) return 1;
 349
 350         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 351
 352         if (en - bg + 1 != hexcnt) return 1;
 353
 354         for(i = 0; i < hexcnt; i += 2) {
 355                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 356
 357                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 358                 data[i / 2] = temp & 0xff;
 359         }
 360
 361         return 0;
 362 }
 363 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 364 {
 365         int bg, en, temp, i;
 366
 367         //if (hexcnt % 2)
 368         //      return 1;
 369
 370         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 371
 372         *hexcnt = en - bg + 1;
 373         if (*hexcnt % 2) //error if not complete hex bytes
 374                 return 1;
 375
 376         for(i = 0; i < *hexcnt; i += 2) {
 377                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 378
 379                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 380                 data[i / 2] = temp & 0xff;
 381         }
 382
 383         return 0;
 384 }
 385 int param_getstr(const char *line, int paramnum, char * str)
 386 {
 387         int bg, en;
 388
 389         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 390
 391         memcpy(str, line + bg, en - bg + 1);
 392         str[en - bg + 1] = 0;
 393
 394         return en - bg + 1;
 395 }
 396
 397 /*
 398 The following methods comes from Rfidler sourcecode.
 399 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 400 */
 401
 402 // convert hex to sequence of 0/1 bit values
 403 // returns number of bits converted
 404 int hextobinarray(char *target, char *source)
 405 {
 406     int length, i, count= 0;
 407     char x;
 408
 409     length = strlen(source);
 410     // process 4 bits (1 hex digit) at a time
 411     while(length--)
 412     {
 413         x= *(source++);
 414         // capitalize
 415         if (x >= 'a' && x <= 'f')
 416             x -= 32;
 417         // convert to numeric value
 418         if (x >= '0' && x <= '9')
 419             x -= '0';
 420         else if (x >= 'A' && x <= 'F')
 421             x -= 'A' - 10;
 422         else
 423             return 0;
 424         // output
 425         for(i= 0 ; i < 4 ; ++i, ++count)
 426             *(target++)= (x >> (3 - i)) & 1;
 427     }
 428
 429     return count;
 430 }
 431
 432 // convert hex to human readable binary string
 433 int hextobinstring(char *target, char *source)
 434 {
 435     int length;
 436
 437     if(!(length= hextobinarray(target, source)))
 438         return 0;
 439     binarraytobinstring(target, target, length);
 440     return length;
 441 }
 442
 443 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 444 // return number of bits converted
 445 int binarraytohex(char *target, char *source, int length)
 446 {
 447     unsigned char i, x;
 448     int j = length;
 449
 450     if(j % 4)
 451         return 0;
 452
 453     while(j)
 454     {
 455         for(i= x= 0 ; i < 4 ; ++i)
 456             x +=  ( source[i] << (3 - i));
 457         sprintf(target,"%X", x);
 458         ++target;
 459         source += 4;
 460         j -= 4;
 461     }
 462     return length;
 463 }
 464
 465 // convert binary array to human readable binary
 466 void binarraytobinstring(char *target, char *source,  int length)
 467 {
 468     int i;
 469
 470     for(i= 0 ; i < length ; ++i)
 471         *(target++)= *(source++) + '0';
 472     *target= '\0';
 473 }
 474
 475 // return parity bit required to match type
 476 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 477 {
 478     int x;
 479     for( x = 0 ; length > 0 ; --length)
 480         x += bits[length - 1];
 481     x %= 2;
 482     return x ^ type;
 483 }
 484
 485 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 486 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 487 {
 488     *(target++)= GetParity(source, EVEN, length / 2);
 489     memcpy(target, source, length);
 490     target += length;
 491     *(target)= GetParity(source + length / 2, ODD, length / 2);
 492 }
 493
 494 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 495    for( ; len > 0; len--,dst++,src++)
 496        *dst ^= *src;
 497 }
 498
 499 int32_t le24toh (uint8_t data[3]) {
 500     return (data[2] << 16) | (data[1] << 8) | data[0];
 501 }
 502
 503 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 504
 505         if (len > 32) return 0;
 506
 507         int i = start;
 508         int j = len-1;
 509         uint32_t tmp = 0;
 510
 511         for (; j >= 0; --j, ++i)
 512                 tmp     |= bits[i] << j;
 513
 514         return tmp;
 515 }
 516
 517 // RotateLeft - Ultralight, Desfire, works on byte level
 518 // 00-01-02  >> 01-02-00
 519 void rol(uint8_t *data, const size_t len){
 520     uint8_t first = data[0];
 521     for (size_t i = 0; i < len-1; i++) {
 522         data[i] = data[i+1];
 523     }
 524     data[len-1] = first;
 525 }
 526
 527 uint32_t SwapBits(uint32_t value, int nrbits) {
 528         uint32_t newvalue = 0;
 529         for(int i = 0; i < nrbits; i++) {
 530                 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
 531         }
 532         return newvalue;
 533 }