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 = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 128         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 129         //clear memory
 130         memset(buf, 0x00, sizeof(buf));
 131         char *tmp = buf;
 132
 133         size_t in_index = 0;
 134         // loop through the out_index to make sure we don't go too far
 135         for (size_t out_index=0; out_index < max_len; out_index++) {
 136                 // set character
 137                 sprintf(tmp++, "%u", data[in_index]);
 138                 // check if a line break is needed
 139                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 140                         // increment and print line break
 141                         out_index++;
 142                         sprintf(tmp++, "%s","\n");
 143         }
 144                 in_index++;
 145         }
 146
 147         return buf;
 148 }
 149
 150 char *sprint_bin(const uint8_t *data, const size_t len) {
 151         return sprint_bin_break(data, len, 0);
 152 }
 153 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 154 {
 155         while (len--) {
 156                 dest[len] = (uint8_t) n;
 157                 n >>= 8;
 158         }
 159 }
 160
 161 uint64_t bytes_to_num(uint8_t* src, size_t len)
 162 {
 163         uint64_t num = 0;
 164         while (len--)
 165         {
 166                 num = (num << 8) | (*src);
 167                 src++;
 168         }
 169         return num;
 170 }
 171
 172 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 173         while (len--) {
 174                 dest[len] = n & 1;
 175                 n >>= 1;
 176         }
 177 }
 178
 179 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 180 // to
 181 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 182 // up to 64 bytes or 512 bits
 183 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 184         //static uint8_t buf[64];
 185         uint8_t buf[64];
 186         memset(buf, 0x00, 64);
 187         uint8_t *tmp = buf;
 188         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 189                 for (size_t i = 0; i < blockSize; i++){
 190                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 191                 }
 192         }
 193         return tmp;
 194 }
 195
 196 //assumes little endian
 197 char * printBits(size_t const size, void const * const ptr)
 198 {
 199     unsigned char *b = (unsigned char*) ptr;
 200     unsigned char byte;
 201         static char buf[1024];
 202         char * tmp = buf;
 203     int i, j;
 204
 205     for (i=size-1;i>=0;i--)
 206     {
 207         for (j=7;j>=0;j--)
 208         {
 209             byte = b[i] & (1<<j);
 210             byte >>= j;
 211             sprintf(tmp, "%u", byte);
 212                         tmp++;
 213         }
 214     }
 215         return buf;
 216 }
 217
 218 //  -------------------------------------------------------------------------
 219 //  string parameters lib
 220 //  -------------------------------------------------------------------------
 221
 222 //  -------------------------------------------------------------------------
 223 //  line     - param line
 224 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 225 //  paramnum - param number (from 0)
 226 //  -------------------------------------------------------------------------
 227 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 228 {
 229         int i;
 230         int len = strlen(line);
 231
 232         *bg = 0;
 233         *en = 0;
 234
 235   // skip spaces
 236         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 237         if (*bg >= len) {
 238                 return 1;
 239         }
 240
 241         for (i = 0; i < paramnum; i++) {
 242                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 243                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 244
 245                 if (line[*bg] == '\0') return 1;
 246         }
 247
 248         *en = *bg;
 249         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 250
 251         (*en)--;
 252
 253         return 0;
 254 }
 255
 256
 257 char param_getchar(const char *line, int paramnum)
 258 {
 259         int bg, en;
 260
 261         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 262
 263         return line[bg];
 264 }
 265
 266 uint8_t param_get8(const char *line, int paramnum)
 267 {
 268         return param_get8ex(line, paramnum, 0, 10);
 269 }
 270
 271 /**
 272  * @brief Reads a decimal integer (actually, 0-254, not 255)
 273  * @param line
 274  * @param paramnum
 275  * @return -1 if error
 276  */
 277 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 278 {
 279         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 280         if( (int8_t) val == -1) return 1;
 281         (*destination) = val;
 282         return 0;
 283 }
 284 /**
 285  * @brief Checks if param is decimal
 286  * @param line
 287  * @param paramnum
 288  * @return
 289  */
 290 uint8_t param_isdec(const char *line, int paramnum)
 291 {
 292         int bg, en;
 293         //TODO, check more thorougly
 294         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 295                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 296
 297         return 0;
 298 }
 299
 300 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 301 {
 302         int bg, en;
 303
 304         if (!param_getptr(line, &bg, &en, paramnum))
 305                 return strtoul(&line[bg], NULL, base) & 0xff;
 306         else
 307                 return deflt;
 308 }
 309
 310 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 311 {
 312         int bg, en;
 313
 314         if (!param_getptr(line, &bg, &en, paramnum))
 315                 return strtoul(&line[bg], NULL, base);
 316         else
 317                 return deflt;
 318 }
 319
 320 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 321 {
 322         int bg, en;
 323
 324         if (!param_getptr(line, &bg, &en, paramnum))
 325                 return strtoull(&line[bg], NULL, base);
 326         else
 327                 return deflt;
 328
 329         return 0;
 330 }
 331
 332 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 333 {
 334         int bg, en, temp, i;
 335
 336         if (hexcnt % 2)
 337                 return 1;
 338
 339         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 340
 341         if (en - bg + 1 != hexcnt)
 342                 return 1;
 343
 344         for(i = 0; i < hexcnt; i += 2) {
 345                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 346
 347                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 348                 data[i / 2] = temp & 0xff;
 349         }
 350
 351         return 0;
 352 }
 353 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 354 {
 355         int bg, en, temp, i;
 356
 357         //if (hexcnt % 2)
 358         //      return 1;
 359
 360         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 361
 362         *hexcnt = en - bg + 1;
 363         if (*hexcnt % 2) //error if not complete hex bytes
 364                 return 1;
 365
 366         for(i = 0; i < *hexcnt; i += 2) {
 367                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 368
 369                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 370                 data[i / 2] = temp & 0xff;
 371         }
 372
 373         return 0;
 374 }
 375 int param_getstr(const char *line, int paramnum, char * str)
 376 {
 377         int bg, en;
 378
 379         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 380
 381         memcpy(str, line + bg, en - bg + 1);
 382         str[en - bg + 1] = 0;
 383
 384         return en - bg + 1;
 385 }
 386
 387 /*
 388 The following methods comes from Rfidler sourcecode.
 389 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 390 */
 391
 392 // convert hex to sequence of 0/1 bit values
 393 // returns number of bits converted
 394 int hextobinarray(char *target, char *source)
 395 {
 396     int length, i, count= 0;
 397     char x;
 398
 399     length = strlen(source);
 400     // process 4 bits (1 hex digit) at a time
 401     while(length--)
 402     {
 403         x= *(source++);
 404         // capitalize
 405         if (x >= 'a' && x <= 'f')
 406             x -= 32;
 407         // convert to numeric value
 408         if (x >= '0' && x <= '9')
 409             x -= '0';
 410         else if (x >= 'A' && x <= 'F')
 411             x -= 'A' - 10;
 412         else
 413             return 0;
 414         // output
 415         for(i= 0 ; i < 4 ; ++i, ++count)
 416             *(target++)= (x >> (3 - i)) & 1;
 417     }
 418
 419     return count;
 420 }
 421
 422 // convert hex to human readable binary string
 423 int hextobinstring(char *target, char *source)
 424 {
 425     int length;
 426
 427     if(!(length= hextobinarray(target, source)))
 428         return 0;
 429     binarraytobinstring(target, target, length);
 430     return length;
 431 }
 432
 433 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 434 // return number of bits converted
 435 int binarraytohex(char *target, char *source, int length)
 436 {
 437     unsigned char i, x;
 438     int j = length;
 439
 440     if(j % 4)
 441         return 0;
 442
 443     while(j)
 444     {
 445         for(i= x= 0 ; i < 4 ; ++i)
 446             x +=  ( source[i] << (3 - i));
 447         sprintf(target,"%X", x);
 448         ++target;
 449         source += 4;
 450         j -= 4;
 451     }
 452     return length;
 453 }
 454
 455 // convert binary array to human readable binary
 456 void binarraytobinstring(char *target, char *source,  int length)
 457 {
 458     int i;
 459
 460     for(i= 0 ; i < length ; ++i)
 461         *(target++)= *(source++) + '0';
 462     *target= '\0';
 463 }
 464
 465 // return parity bit required to match type
 466 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 467 {
 468     int x;
 469
 470     for(x= 0 ; length > 0 ; --length)
 471         x += bits[length - 1];
 472     x %= 2;
 473
 474     return x ^ type;
 475 }
 476
 477 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 478 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 479 {
 480     *(target++)= GetParity(source, EVEN, length / 2);
 481     memcpy(target, source, length);
 482     target += length;
 483     *(target)= GetParity(source + length / 2, ODD, length / 2);
 484 }
 485
 486 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 487    for( ; len > 0; len--,dst++,src++)
 488        *dst ^= *src;
 489 }
 490
 491 int32_t le24toh (uint8_t data[3]) {
 492     return (data[2] << 16) | (data[1] << 8) | data[0];
 493 }
 494
 495 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 496
 497         if (len > 32) return 0;
 498
 499         int i = start;
 500         int j = len-1;
 501         uint32_t tmp = 0;
 502
 503         for (; j >= 0; --j, ++i)
 504                 tmp     |= bits[i] << j;
 505
 506         return tmp;
 507 }
 508
 509 // RotateLeft - Ultralight, Desfire
 510 void rol(uint8_t *data, const size_t len){
 511     uint8_t first = data[0];
 512     for (size_t i = 0; i < len-1; i++) {
 513         data[i] = data[i+1];
 514     }
 515     data[len-1] = first;
 516 }