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         return buf;
 163 }
 164 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 165 {
 166         while (len--) {
 167                 dest[len] = (uint8_t) n;
 168                 n >>= 8;
 169         }
 170 }
 171
 172 uint64_t bytes_to_num(uint8_t* src, size_t len)
 173 {
 174         uint64_t num = 0;
 175         while (len--)
 176         {
 177                 num = (num << 8) | (*src);
 178                 src++;
 179         }
 180         return num;
 181 }
 182
 183 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 184         while (len--) {
 185                 dest[len] = n & 1;
 186                 n >>= 1;
 187         }
 188 }
 189
 190 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 191 // to
 192 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 193 // up to 64 bytes or 512 bits
 194 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 195         //static uint8_t buf[64];
 196         uint8_t buf[64];
 197         memset(buf, 0x00, 64);
 198         uint8_t *tmp = buf;
 199         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 200                 for (size_t i = 0; i < blockSize; i++){
 201                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 202                 }
 203         }
 204         return tmp;
 205 }
 206
 207 //assumes little endian
 208 char * printBits(size_t const size, void const * const ptr)
 209 {
 210     unsigned char *b = (unsigned char*) ptr;
 211     unsigned char byte;
 212         static char buf[1024];
 213         char * tmp = buf;
 214     int i, j;
 215
 216     for (i=size-1;i>=0;i--)
 217     {
 218         for (j=7;j>=0;j--)
 219         {
 220             byte = b[i] & (1<<j);
 221             byte >>= j;
 222             sprintf(tmp, "%u", byte);
 223                         tmp++;
 224         }
 225     }
 226         return buf;
 227 }
 228
 229 //  -------------------------------------------------------------------------
 230 //  string parameters lib
 231 //  -------------------------------------------------------------------------
 232
 233 //  -------------------------------------------------------------------------
 234 //  line     - param line
 235 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 236 //  paramnum - param number (from 0)
 237 //  -------------------------------------------------------------------------
 238 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 239 {
 240         int i;
 241         int len = strlen(line);
 242
 243         *bg = 0;
 244         *en = 0;
 245
 246   // skip spaces
 247         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 248         if (*bg >= len) {
 249                 return 1;
 250         }
 251
 252         for (i = 0; i < paramnum; i++) {
 253                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 254                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 255
 256                 if (line[*bg] == '\0') return 1;
 257         }
 258
 259         *en = *bg;
 260         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 261
 262         (*en)--;
 263
 264         return 0;
 265 }
 266
 267
 268 char param_getchar(const char *line, int paramnum)
 269 {
 270         int bg, en;
 271
 272         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 273
 274         return line[bg];
 275 }
 276
 277 uint8_t param_get8(const char *line, int paramnum)
 278 {
 279         return param_get8ex(line, paramnum, 0, 10);
 280 }
 281
 282 /**
 283  * @brief Reads a decimal integer (actually, 0-254, not 255)
 284  * @param line
 285  * @param paramnum
 286  * @return -1 if error
 287  */
 288 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 289 {
 290         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 291         if( (int8_t) val == -1) return 1;
 292         (*destination) = val;
 293         return 0;
 294 }
 295 /**
 296  * @brief Checks if param is decimal
 297  * @param line
 298  * @param paramnum
 299  * @return
 300  */
 301 uint8_t param_isdec(const char *line, int paramnum)
 302 {
 303         int bg, en;
 304         //TODO, check more thorougly
 305         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 306                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 307
 308         return 0;
 309 }
 310
 311 uint8_t param_get8ex(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 strtoul(&line[bg], NULL, base) & 0xff;
 317         else
 318                 return deflt;
 319 }
 320
 321 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 322 {
 323         int bg, en;
 324
 325         if (!param_getptr(line, &bg, &en, paramnum))
 326                 return strtoul(&line[bg], NULL, base);
 327         else
 328                 return deflt;
 329 }
 330
 331 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 332 {
 333         int bg, en;
 334
 335         if (!param_getptr(line, &bg, &en, paramnum))
 336                 return strtoull(&line[bg], NULL, base);
 337         else
 338                 return deflt;
 339
 340         return 0;
 341 }
 342
 343 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 344 {
 345         int bg, en, temp, i;
 346
 347         if (hexcnt % 2)
 348                 return 1;
 349
 350         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 351
 352         if (en - bg + 1 != hexcnt)
 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_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 365 {
 366         int bg, en, temp, i;
 367
 368         //if (hexcnt % 2)
 369         //      return 1;
 370
 371         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 372
 373         *hexcnt = en - bg + 1;
 374         if (*hexcnt % 2) //error if not complete hex bytes
 375                 return 1;
 376
 377         for(i = 0; i < *hexcnt; i += 2) {
 378                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 379
 380                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 381                 data[i / 2] = temp & 0xff;
 382         }
 383
 384         return 0;
 385 }
 386 int param_getstr(const char *line, int paramnum, char * str)
 387 {
 388         int bg, en;
 389
 390         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 391
 392         memcpy(str, line + bg, en - bg + 1);
 393         str[en - bg + 1] = 0;
 394
 395         return en - bg + 1;
 396 }
 397
 398 /*
 399 The following methods comes from Rfidler sourcecode.
 400 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 401 */
 402
 403 // convert hex to sequence of 0/1 bit values
 404 // returns number of bits converted
 405 int hextobinarray(char *target, char *source)
 406 {
 407     int length, i, count= 0;
 408     char x;
 409
 410     length = strlen(source);
 411     // process 4 bits (1 hex digit) at a time
 412     while(length--)
 413     {
 414         x= *(source++);
 415         // capitalize
 416         if (x >= 'a' && x <= 'f')
 417             x -= 32;
 418         // convert to numeric value
 419         if (x >= '0' && x <= '9')
 420             x -= '0';
 421         else if (x >= 'A' && x <= 'F')
 422             x -= 'A' - 10;
 423         else
 424             return 0;
 425         // output
 426         for(i= 0 ; i < 4 ; ++i, ++count)
 427             *(target++)= (x >> (3 - i)) & 1;
 428     }
 429
 430     return count;
 431 }
 432
 433 // convert hex to human readable binary string
 434 int hextobinstring(char *target, char *source)
 435 {
 436     int length;
 437
 438     if(!(length= hextobinarray(target, source)))
 439         return 0;
 440     binarraytobinstring(target, target, length);
 441     return length;
 442 }
 443
 444 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 445 // return number of bits converted
 446 int binarraytohex(char *target, char *source, int length)
 447 {
 448     unsigned char i, x;
 449     int j = length;
 450
 451     if(j % 4)
 452         return 0;
 453
 454     while(j)
 455     {
 456         for(i= x= 0 ; i < 4 ; ++i)
 457             x +=  ( source[i] << (3 - i));
 458         sprintf(target,"%X", x);
 459         ++target;
 460         source += 4;
 461         j -= 4;
 462     }
 463     return length;
 464 }
 465
 466 // convert binary array to human readable binary
 467 void binarraytobinstring(char *target, char *source,  int length)
 468 {
 469     int i;
 470
 471     for(i= 0 ; i < length ; ++i)
 472         *(target++)= *(source++) + '0';
 473     *target= '\0';
 474 }
 475
 476 // return parity bit required to match type
 477 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 478 {
 479     int x;
 480
 481     for(x= 0 ; length > 0 ; --length)
 482         x += bits[length - 1];
 483     x %= 2;
 484
 485     return x ^ type;
 486 }
 487
 488 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 489 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 490 {
 491     *(target++)= GetParity(source, EVEN, length / 2);
 492     memcpy(target, source, length);
 493     target += length;
 494     *(target)= GetParity(source + length / 2, ODD, length / 2);
 495 }
 496
 497 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 498    for( ; len > 0; len--,dst++,src++)
 499        *dst ^= *src;
 500 }
 501
 502 int32_t le24toh (uint8_t data[3]) {
 503     return (data[2] << 16) | (data[1] << 8) | data[0];
 504 }
 505
 506 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 507
 508         if (len > 32) return 0;
 509
 510         int i = start;
 511         int j = len-1;
 512         uint32_t tmp = 0;
 513
 514         for (; j >= 0; --j, ++i)
 515                 tmp     |= bits[i] << j;
 516
 517         return tmp;
 518 }
 519
 520 // RotateLeft - Ultralight, Desfire
 521 void rol(uint8_t *data, const size_t len){
 522     uint8_t first = data[0];
 523     for (size_t i = 0; i < len-1; i++) {
 524         data[i] = data[i+1];
 525     }
 526     data[len-1] = first;
 527 }