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 #include <stdint.h>
  14 #include <string.h>
  15 #include <ctype.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <time.h>
  19
  20 #ifdef _WIN32
  21 #include <windows.h>
  22 #endif
  23
  24 #define MAX_BIN_BREAK_LENGTH   (3072+384+1)
  25
  26 #ifndef _WIN32
  27 #include <termios.h>
  28 #include <sys/ioctl.h>
  29 #include <unistd.h>
  30
  31 int ukbhit(void)
  32 {
  33   int cnt = 0;
  34   int error;
  35   static struct termios Otty, Ntty;
  36
  37   if ( tcgetattr(STDIN_FILENO, &Otty) == -1 ) return -1;
  38   Ntty = Otty;
  39
  40   Ntty.c_iflag          = 0x0000;   // input mode
  41   Ntty.c_oflag          = 0x0000;   // output mode
  42   Ntty.c_lflag         &= ~ICANON;  // control mode = raw
  43   Ntty.c_cc[VMIN]       = 1;        // return if at least 1 character is in the queue
  44   Ntty.c_cc[VTIME]      = 0;        // no timeout. Wait forever
  45
  46   if (0 == (error = tcsetattr(STDIN_FILENO, TCSANOW, &Ntty))) {   // set new attributes
  47     error += ioctl(STDIN_FILENO, FIONREAD, &cnt);                 // get number of characters availabe
  48     error += tcsetattr(STDIN_FILENO, TCSANOW, &Otty);             // reset attributes
  49   }
  50
  51   return ( error == 0 ? cnt : -1 );
  52 }
  53
  54 #else
  55
  56 #include <conio.h>
  57 int ukbhit(void) {
  58         return kbhit();
  59 }
  60 #endif
  61
  62 // log files functions
  63 void AddLogLine(char *file, char *extData, char *c) {
  64         FILE *fLog = NULL;
  65     char filename[FILE_PATH_SIZE] = {0x00};
  66     int len = 0;
  67
  68     len = strlen(file);
  69     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
  70     memcpy(filename, file, len);
  71
  72         fLog = fopen(filename, "a");
  73         if (!fLog) {
  74                 printf("Could not append log file %s", filename);
  75                 return;
  76         }
  77
  78         fprintf(fLog, "%s", extData);
  79         fprintf(fLog, "%s\n", c);
  80         fclose(fLog);
  81 }
  82
  83 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
  84         AddLogLine(fileName, extData, sprint_hex(data, len));
  85 }
  86
  87 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
  88   char buf[100] = {0};
  89         sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
  90         AddLogLine(fileName, extData, buf);
  91 }
  92
  93 void AddLogCurrentDT(char *fileName) {
  94         char buff[20];
  95         struct tm *curTime;
  96
  97         time_t now = time(0);
  98         curTime = gmtime(&now);
  99
 100         strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
 101         AddLogLine(fileName, "\nanticollision: ", buff);
 102 }
 103
 104 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
 105         char * fnameptr = fileName;
 106         memset(fileName, 0x00, 200);
 107
 108         for (int j = 0; j < byteCount; j++, fnameptr += 2)
 109                 sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
 110         sprintf(fnameptr, "%s", ext);
 111 }
 112
 113 void hex_to_buffer(const uint8_t *buf, const uint8_t *hex_data, const size_t hex_len, const size_t hex_max_len,
 114         const size_t min_str_len, const size_t spaces_between, bool uppercase) {
 115
 116         char *tmp = (char *)buf;
 117         size_t i;
 118         memset(tmp, 0x00, hex_max_len);
 119
 120         int maxLen = ( hex_len > hex_max_len) ? hex_max_len : hex_len;
 121
 122         for (i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
 123                 sprintf(tmp, (uppercase) ? "%02X" : "%02x", (unsigned int) hex_data[i]);
 124
 125                 for (int j = 0; j < spaces_between; j++)
 126                         sprintf(tmp + 2 + j, " ");
 127         }
 128
 129         i *= (2 + spaces_between);
 130         int minStrLen = min_str_len > i ? min_str_len : 0;
 131         if (minStrLen > hex_max_len)
 132                 minStrLen = hex_max_len;
 133         for(; i < minStrLen; i++, tmp += 1)
 134                 sprintf(tmp, " ");
 135
 136         return;
 137 }
 138
 139 // printing and converting functions
 140
 141 char *sprint_hex(const uint8_t *data, const size_t len) {
 142         static char buf[1025] = {0};
 143
 144         hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, 0, 1, false);
 145
 146         return buf;
 147 }
 148
 149 char *sprint_hex_inrow_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
 150         static char buf[1025] = {0};
 151
 152         hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, min_str_len, 0, false);
 153
 154         return buf;
 155 }
 156
 157 char *sprint_hex_inrow(const uint8_t *data, const size_t len) {
 158         return sprint_hex_inrow_ex(data, len, 0);
 159 }
 160
 161 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 162         // make sure we don't go beyond our char array memory
 163         int max_len;
 164         if (breaks==0)
 165                 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
 166         else
 167                 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 168
 169         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 170         //clear memory
 171         memset(buf, 0x00, sizeof(buf));
 172         char *tmp = buf;
 173
 174         size_t in_index = 0;
 175         // loop through the out_index to make sure we don't go too far
 176         for (size_t out_index=0; out_index < max_len; out_index++) {
 177                 // set character - (should be binary but verify it isn't more than 1 digit)
 178                 if (data[in_index]<10)
 179                         sprintf(tmp++, "%u", (unsigned int) data[in_index]);
 180                 // check if a line break is needed and we have room to print it in our array
 181                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 < max_len) ) {
 182                         // increment and print line break
 183                         out_index++;
 184                         sprintf(tmp++, "%s","\n");
 185                 }
 186                 in_index++;
 187         }
 188
 189         return buf;
 190 }
 191
 192 char *sprint_bin(const uint8_t *data, const size_t len) {
 193         return sprint_bin_break(data, len, 0);
 194 }
 195
 196 char *sprint_ascii_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
 197         static char buf[1024];
 198         char *tmp = buf;
 199         memset(buf, 0x00, 1024);
 200         size_t max_len = (len > 1010) ? 1010 : len;
 201         size_t i = 0;
 202         while(i < max_len){
 203                 char c = data[i];
 204                 tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
 205                 ++i;
 206         }
 207
 208         int minStrLen = min_str_len > i ? min_str_len : 0;
 209         for(; i < minStrLen; ++i)
 210                 tmp[i] = ' ';
 211
 212         return buf;
 213 }
 214
 215 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 216 {
 217         while (len--) {
 218                 dest[len] = (uint8_t) n;
 219                 n >>= 8;
 220         }
 221 }
 222
 223 uint64_t bytes_to_num(uint8_t* src, size_t len)
 224 {
 225         uint64_t num = 0;
 226         while (len--)
 227         {
 228                 num = (num << 8) | (*src);
 229                 src++;
 230         }
 231         return num;
 232 }
 233
 234 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 235         while (len--) {
 236                 dest[len] = n & 1;
 237                 n >>= 1;
 238         }
 239 }
 240
 241 //least significant bit first
 242 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
 243         for(int i = 0 ; i < len ; ++i) {
 244                 dest[i] =  n & 1;
 245                 n >>= 1;
 246         }
 247 }
 248
 249 // Swap bit order on a uint32_t value.  Can be limited by nrbits just use say 8bits reversal
 250 // And clears the rest of the bits.
 251 uint32_t SwapBits(uint32_t value, int nrbits) {
 252         uint32_t newvalue = 0;
 253         for(int i = 0; i < nrbits; i++) {
 254                 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
 255         }
 256         return newvalue;
 257 }
 258
 259 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 260 // to
 261 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 262 // up to 64 bytes or 512 bits
 263 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 264         static uint8_t buf[64];
 265         memset(buf, 0x00, 64);
 266         uint8_t *tmp = buf;
 267         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 268                 for (size_t i = 0; i < blockSize; i++){
 269                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 270                 }
 271         }
 272         return tmp;
 273 }
 274
 275 //assumes little endian
 276 char * printBits(size_t const size, void const * const ptr)
 277 {
 278     unsigned char *b = (unsigned char*) ptr;
 279     unsigned char byte;
 280         static char buf[1024];
 281         char * tmp = buf;
 282     int i, j;
 283
 284     for (i=size-1;i>=0;i--)
 285     {
 286         for (j=7;j>=0;j--)
 287         {
 288             byte = b[i] & (1<<j);
 289             byte >>= j;
 290             sprintf(tmp, "%u", (unsigned int)byte);
 291                         tmp++;
 292         }
 293     }
 294         return buf;
 295 }
 296
 297 char * printBitsPar(const uint8_t *b, size_t len) {
 298         static char buf1[512] = {0};
 299         static char buf2[512] = {0};
 300         static char *buf;
 301         if (buf != buf1)
 302                 buf = buf1;
 303         else
 304                 buf = buf2;
 305         memset(buf, 0x00, 512);
 306
 307         for (int i = 0; i < len; i++) {
 308                 buf[i] = ((b[i / 8] << (i % 8)) & 0x80) ? '1':'0';
 309         }
 310         return buf;
 311 }
 312
 313
 314 //  -------------------------------------------------------------------------
 315 //  string parameters lib
 316 //  -------------------------------------------------------------------------
 317
 318 //  -------------------------------------------------------------------------
 319 //  line     - param line
 320 //  bg, en   - symbol numbers in param line of beginning and ending parameter
 321 //  paramnum - param number (from 0)
 322 //  -------------------------------------------------------------------------
 323 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 324 {
 325         int i;
 326         int len = strlen(line);
 327
 328         *bg = 0;
 329         *en = 0;
 330
 331   // skip spaces
 332         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 333         if (*bg >= len) {
 334                 return 1;
 335         }
 336
 337         for (i = 0; i < paramnum; i++) {
 338                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 339                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 340
 341                 if (line[*bg] == '\0') return 1;
 342         }
 343
 344         *en = *bg;
 345         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 346
 347         (*en)--;
 348
 349         return 0;
 350 }
 351
 352
 353 int param_getlength(const char *line, int paramnum)
 354 {
 355         int bg, en;
 356
 357         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 358
 359         return en - bg + 1;
 360 }
 361
 362 char param_getchar(const char *line, int paramnum) {
 363         return param_getchar_indx(line, 0, paramnum);
 364 }
 365
 366 char param_getchar_indx(const char *line, int indx, int paramnum) {
 367         int bg, en;
 368
 369         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 370
 371         if (bg + indx > en)
 372                 return '\0';
 373
 374         return line[bg + indx];
 375 }
 376
 377 uint8_t param_get8(const char *line, int paramnum)
 378 {
 379         return param_get8ex(line, paramnum, 0, 10);
 380 }
 381
 382 /**
 383  * @brief Reads a decimal integer (actually, 0-254, not 255)
 384  * @param line
 385  * @param paramnum
 386  * @return -1 if error
 387  */
 388 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 389 {
 390         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 391         if( (int8_t) val == -1) return 1;
 392         (*destination) = val;
 393         return 0;
 394 }
 395 /**
 396  * @brief Checks if param is decimal
 397  * @param line
 398  * @param paramnum
 399  * @return
 400  */
 401 uint8_t param_isdec(const char *line, int paramnum)
 402 {
 403         int bg, en;
 404         //TODO, check more thorougly
 405         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 406                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 407
 408         return 0;
 409 }
 410
 411 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 412 {
 413         int bg, en;
 414
 415         if (!param_getptr(line, &bg, &en, paramnum))
 416                 return strtoul(&line[bg], NULL, base) & 0xff;
 417         else
 418                 return deflt;
 419 }
 420
 421 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 422 {
 423         int bg, en;
 424
 425         if (!param_getptr(line, &bg, &en, paramnum))
 426                 return strtoul(&line[bg], NULL, base);
 427         else
 428                 return deflt;
 429 }
 430
 431 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 432 {
 433         int bg, en;
 434
 435         if (!param_getptr(line, &bg, &en, paramnum))
 436                 return strtoull(&line[bg], NULL, base);
 437         else
 438                 return deflt;
 439 }
 440
 441 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 442 {
 443         int bg, en, temp, i;
 444
 445         if (hexcnt % 2)
 446                 return 1;
 447
 448         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 449
 450         if (en - bg + 1 != hexcnt)
 451                 return 1;
 452
 453         for(i = 0; i < hexcnt; i += 2) {
 454                 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) )     return 1;
 455
 456                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 457                 data[i / 2] = temp & 0xff;
 458         }
 459
 460         return 0;
 461 }
 462 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 463 {
 464         int bg, en, temp, i;
 465
 466         //if (hexcnt % 2)
 467         //      return 1;
 468
 469         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 470
 471         *hexcnt = en - bg + 1;
 472         if (*hexcnt % 2) //error if not complete hex bytes
 473                 return 1;
 474
 475         for(i = 0; i < *hexcnt; i += 2) {
 476                 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) )     return 1;
 477
 478                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 479                 data[i / 2] = temp & 0xff;
 480         }
 481
 482         return 0;
 483 }
 484
 485 int param_gethex_to_eol(const char *line, int paramnum, uint8_t * data, int maxdatalen, int *datalen) {
 486         int bg, en;
 487         uint32_t temp;
 488         char buf[5] = {0};
 489
 490         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 491
 492         *datalen = 0;
 493
 494         int indx = bg;
 495         while (line[indx]) {
 496                 if (line[indx] == '\t' || line[indx] == ' ') {
 497                         indx++;
 498                         continue;
 499                 }
 500
 501                 if (isxdigit((unsigned char)line[indx])) {
 502                         buf[strlen(buf) + 1] = 0x00;
 503                         buf[strlen(buf)] = line[indx];
 504                 } else {
 505                         // if we have symbols other than spaces and hex
 506                         return 1;
 507                 }
 508
 509                 if (*datalen >= maxdatalen) {
 510                         // if we dont have space in buffer and have symbols to translate
 511                         return 2;
 512                 }
 513
 514                 if (strlen(buf) >= 2) {
 515                         sscanf(buf, "%x", &temp);
 516                         data[*datalen] = (uint8_t)(temp & 0xff);
 517                         *buf = 0;
 518                         (*datalen)++;
 519                 }
 520
 521                 indx++;
 522         }
 523
 524         if (strlen(buf) > 0)
 525                 //error when not completed hex bytes
 526                 return 3;
 527
 528         return 0;
 529 }
 530
 531 int param_getstr(const char *line, int paramnum, char * str, size_t buffersize)
 532 {
 533         int bg, en;
 534
 535         if (param_getptr(line, &bg, &en, paramnum)) {
 536                 return 0;
 537         }
 538
 539         // Prevent out of bounds errors
 540         if (en - bg + 1 >= buffersize) {
 541                 printf("out of bounds error: want %d bytes have %zd bytes\n", en - bg + 1 + 1, buffersize);
 542                 return 0;
 543         }
 544
 545         memcpy(str, line + bg, en - bg + 1);
 546         str[en - bg + 1] = 0;
 547
 548         return en - bg + 1;
 549 }
 550
 551 /*
 552 The following methods comes from Rfidler sourcecode.
 553 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 554 */
 555
 556 // convert hex to sequence of 0/1 bit values
 557 // returns number of bits converted
 558 int hextobinarray(char *target, char *source)
 559 {
 560     int length, i, count= 0;
 561     char* start = source;
 562     char x;
 563
 564     length = strlen(source);
 565     // process 4 bits (1 hex digit) at a time
 566     while(length--)
 567     {
 568         x= *(source++);
 569         // capitalize
 570         if (x >= 'a' && x <= 'f')
 571             x -= 32;
 572         // convert to numeric value
 573         if (x >= '0' && x <= '9')
 574             x -= '0';
 575         else if (x >= 'A' && x <= 'F')
 576             x -= 'A' - 10;
 577         else {
 578                 printf("Discovered unknown character %c %d at idx %tu of %s\n", x, x, source - start, start);
 579             return 0;
 580         }
 581         // output
 582         for(i= 0 ; i < 4 ; ++i, ++count)
 583             *(target++)= (x >> (3 - i)) & 1;
 584     }
 585
 586     return count;
 587 }
 588
 589 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 590 // return number of bits converted
 591 int binarraytohex(char *target,char *source, int length)
 592 {
 593     unsigned char i, x;
 594     int j = length;
 595
 596     if(j % 4)
 597         return 0;
 598
 599     while(j)
 600     {
 601         for(i= x= 0 ; i < 4 ; ++i)
 602             x +=  ( source[i] << (3 - i));
 603         sprintf(target,"%X", (unsigned int)x);
 604         ++target;
 605         source += 4;
 606         j -= 4;
 607     }
 608     return length;
 609 }
 610
 611 // return parity bit required to match type
 612 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 613 {
 614     int x;
 615
 616     for(x= 0 ; length > 0 ; --length)
 617         x += bits[length - 1];
 618     x %= 2;
 619
 620     return x ^ type;
 621 }
 622
 623 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 624 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 625 {
 626     *(target++)= GetParity(source, EVEN, length / 2);
 627     memcpy(target, source, length);
 628     target += length;
 629     *(target)= GetParity(source + length / 2, ODD, length / 2);
 630 }
 631
 632 // xor two arrays together for len items.  The dst array contains the new xored values.
 633 void xor(unsigned char *dst, unsigned char *src, size_t len) {
 634    for( ; len > 0; len--,dst++,src++)
 635        *dst ^= *src;
 636 }
 637
 638 // RotateLeft - Ultralight, Desfire, works on byte level
 639 // 00-01-02  >> 01-02-00
 640 void rol(uint8_t *data, const size_t len){
 641     uint8_t first = data[0];
 642     for (size_t i = 0; i < len-1; i++) {
 643         data[i] = data[i+1];
 644     }
 645     data[len-1] = first;
 646 }
 647
 648
 649 // Replace unprintable characters with a dot in char buffer
 650 void clean_ascii(unsigned char *buf, size_t len) {
 651   for (size_t i = 0; i < len; i++) {
 652     if (!isprint(buf[i]))
 653       buf[i] = '.';
 654   }
 655 }
 656
 657 // replace \r \n to \0
 658 void strcleanrn(char *buf, size_t len) {
 659         strcreplace(buf, len, '\n', '\0');
 660         strcreplace(buf, len, '\r', '\0');
 661 }
 662
 663 // replace char in buffer
 664 void strcreplace(char *buf, size_t len, char from, char to) {
 665   for (size_t i = 0; i < len; i++) {
 666     if (buf[i] == from)
 667       buf[i] = to;
 668   }
 669 }
 670
 671 char *strmcopy(char *buf) {
 672         char * str = NULL;
 673         if ((str = (char*) malloc(strlen(buf) + 1)) != NULL) {
 674                 memset(str, 0, strlen(buf) + 1);
 675                 strcpy(str, buf);
 676         }
 677         return str;
 678 }
 679
 680
 681 // determine number of logical CPU cores (use for multithreaded functions)
 682 extern int num_CPUs(void)
 683 {
 684 #if defined(_WIN32)
 685         #include <sysinfoapi.h>
 686         SYSTEM_INFO sysinfo;
 687         GetSystemInfo(&sysinfo);
 688         return sysinfo.dwNumberOfProcessors;
 689 #elif defined(__linux__) || defined(__APPLE__)
 690         #include <unistd.h>
 691         return sysconf(_SC_NPROCESSORS_ONLN);
 692 #else
 693         return 1;
 694 #endif
 695 }
 696