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
  19 int ukbhit(void)
  20 {
  21   int cnt = 0;
  22   int error;
  23   static struct termios Otty, Ntty;
  24
  25
  26   if ( tcgetattr( 0, &Otty) == -1 ) return -1;
  27   Ntty = Otty;
  28
  29   Ntty.c_iflag          = 0;       /* input mode                */
  30   Ntty.c_oflag          = 0;       /* output mode               */
  31   Ntty.c_lflag         &= ~ICANON; /* raw mode */
  32   Ntty.c_cc[VMIN]       = CMIN;    /* minimum time to wait      */
  33   Ntty.c_cc[VTIME]      = CTIME;   /* minimum characters to wait for */
  34
  35   if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
  36     error += ioctl(0, FIONREAD, &cnt);
  37     error += tcsetattr(0, TCSANOW, &Otty);
  38   }
  39
  40   return ( error == 0 ? cnt : -1 );
  41 }
  42
  43 #else
  44 #include <conio.h>
  45 int ukbhit(void) {
  46         return kbhit();
  47 }
  48 #endif
  49
  50 // log files functions
  51 void AddLogLine(char *file, char *extData, char *c) {
  52         FILE *fLog = NULL;
  53     char filename[FILE_PATH_SIZE] = {0x00};
  54     int len = 0;
  55
  56     len = strlen(file);
  57     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
  58     memcpy(filename, file, len);
  59
  60         fLog = fopen(filename, "a");
  61         if (!fLog) {
  62                 printf("Could not append log file %s", filename);
  63                 return;
  64         }
  65
  66         fprintf(fLog, "%s", extData);
  67         fprintf(fLog, "%s\n", c);
  68         fclose(fLog);
  69 }
  70
  71 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
  72         AddLogLine(fileName, extData, sprint_hex(data, len));
  73 }
  74
  75 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
  76   char buf[100] = {0};
  77         sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
  78         AddLogLine(fileName, extData, buf);
  79 }
  80
  81 void AddLogCurrentDT(char *fileName) {
  82         char buff[20];
  83         struct tm *curTime;
  84
  85         time_t now = time(0);
  86         curTime = gmtime(&now);
  87
  88         strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
  89         AddLogLine(fileName, "\nanticollision: ", buff);
  90 }
  91
  92 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
  93         char * fnameptr = fileName;
  94         memset(fileName, 0x00, 200);
  95
  96         for (int j = 0; j < byteCount; j++, fnameptr += 2)
  97                 sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
  98         sprintf(fnameptr, "%s", ext);
  99 }
 100
 101 // printing and converting functions
 102
 103 void print_hex(const uint8_t * data, const size_t len)
 104 {
 105         size_t i;
 106
 107         for (i=0; i < len; i++)
 108                 printf("%02x ", data[i]);
 109
 110         printf("\n");
 111 }
 112
 113 char *sprint_hex(const uint8_t *data, const size_t len) {
 114
 115         int maxLen = ( len > 1024/3) ? 1024/3 : len;
 116         static char buf[1024];
 117         memset(buf, 0x00, 1024);
 118         char *tmp = buf;
 119         size_t i;
 120
 121         for (i=0; i < maxLen; ++i, tmp += 3)
 122                 sprintf(tmp, "%02x ", (unsigned int) data[i]);
 123
 124         return buf;
 125 }
 126
 127 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 128         // make sure we don't go beyond our char array memory
 129         int max_len;
 130         if (breaks==0)
 131                 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
 132         else
 133                 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 134
 135         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 136         //clear memory
 137         memset(buf, 0x00, sizeof(buf));
 138         char *tmp = buf;
 139
 140         size_t in_index = 0;
 141         // loop through the out_index to make sure we don't go too far
 142         for (size_t out_index=0; out_index < max_len; out_index++) {
 143                 // set character - (should be binary but verify it isn't more than 1 digit)
 144                 if (data[in_index]<10)
 145                         sprintf(tmp++, "%u", (unsigned int) data[in_index]);
 146                 // check if a line break is needed and we have room to print it in our array
 147                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 148                         // increment and print line break
 149                         out_index++;
 150                         sprintf(tmp++, "%s","\n");
 151                 }
 152                 in_index++;
 153         }
 154
 155         return buf;
 156 }
 157
 158 char *sprint_bin(const uint8_t *data, const size_t len) {
 159         return sprint_bin_break(data, len, 0);
 160 }
 161 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 162 {
 163         while (len--) {
 164                 dest[len] = (uint8_t) n;
 165                 n >>= 8;
 166         }
 167 }
 168
 169 uint64_t bytes_to_num(uint8_t* src, size_t len)
 170 {
 171         uint64_t num = 0;
 172         while (len--)
 173         {
 174                 num = (num << 8) | (*src);
 175                 src++;
 176         }
 177         return num;
 178 }
 179
 180 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 181         while (len--) {
 182                 dest[len] = n & 1;
 183                 n >>= 1;
 184         }
 185 }
 186
 187 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 188 // to
 189 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 190 // up to 64 bytes or 512 bits
 191 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 192         static uint8_t buf[64];
 193         memset(buf, 0x00, 64);
 194         uint8_t *tmp = buf;
 195         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 196                 for (size_t i = 0; i < blockSize; i++){
 197                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 198                 }
 199         }
 200         return tmp;
 201 }
 202
 203 //assumes little endian
 204 char * printBits(size_t const size, void const * const ptr)
 205 {
 206     unsigned char *b = (unsigned char*) ptr;
 207     unsigned char byte;
 208         static char buf[1024];
 209         char * tmp = buf;
 210     int i, j;
 211
 212     for (i=size-1;i>=0;i--)
 213     {
 214         for (j=7;j>=0;j--)
 215         {
 216             byte = b[i] & (1<<j);
 217             byte >>= j;
 218             sprintf(tmp, "%u", (unsigned int)byte);
 219                         tmp++;
 220         }
 221     }
 222         return buf;
 223 }
 224
 225 //  -------------------------------------------------------------------------
 226 //  string parameters lib
 227 //  -------------------------------------------------------------------------
 228
 229 //  -------------------------------------------------------------------------
 230 //  line     - param line
 231 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 232 //  paramnum - param number (from 0)
 233 //  -------------------------------------------------------------------------
 234 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 235 {
 236         int i;
 237         int len = strlen(line);
 238
 239         *bg = 0;
 240         *en = 0;
 241
 242   // skip spaces
 243         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 244         if (*bg >= len) {
 245                 return 1;
 246         }
 247
 248         for (i = 0; i < paramnum; i++) {
 249                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 250                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 251
 252                 if (line[*bg] == '\0') return 1;
 253         }
 254
 255         *en = *bg;
 256         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 257
 258         (*en)--;
 259
 260         return 0;
 261 }
 262
 263
 264 char param_getchar(const char *line, int paramnum)
 265 {
 266         int bg, en;
 267
 268         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 269
 270         return line[bg];
 271 }
 272
 273 uint8_t param_get8(const char *line, int paramnum)
 274 {
 275         return param_get8ex(line, paramnum, 0, 10);
 276 }
 277
 278 /**
 279  * @brief Reads a decimal integer (actually, 0-254, not 255)
 280  * @param line
 281  * @param paramnum
 282  * @return -1 if error
 283  */
 284 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 285 {
 286         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 287         if( (int8_t) val == -1) return 1;
 288         (*destination) = val;
 289         return 0;
 290 }
 291 /**
 292  * @brief Checks if param is decimal
 293  * @param line
 294  * @param paramnum
 295  * @return
 296  */
 297 uint8_t param_isdec(const char *line, int paramnum)
 298 {
 299         int bg, en;
 300         //TODO, check more thorougly
 301         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 302                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 303
 304         return 0;
 305 }
 306
 307 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 308 {
 309         int bg, en;
 310
 311         if (!param_getptr(line, &bg, &en, paramnum))
 312                 return strtoul(&line[bg], NULL, base) & 0xff;
 313         else
 314                 return deflt;
 315 }
 316
 317 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 318 {
 319         int bg, en;
 320
 321         if (!param_getptr(line, &bg, &en, paramnum))
 322                 return strtoul(&line[bg], NULL, base);
 323         else
 324                 return deflt;
 325 }
 326
 327 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 328 {
 329         int bg, en;
 330
 331         if (!param_getptr(line, &bg, &en, paramnum))
 332                 return strtoull(&line[bg], NULL, base);
 333         else
 334                 return deflt;
 335
 336         return 0;
 337 }
 338
 339 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 340 {
 341         int bg, en, temp, i;
 342
 343         if (hexcnt % 2)
 344                 return 1;
 345
 346         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 347
 348         if (en - bg + 1 != hexcnt)
 349                 return 1;
 350
 351         for(i = 0; i < hexcnt; i += 2) {
 352                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 353
 354                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 355                 data[i / 2] = temp & 0xff;
 356         }
 357
 358         return 0;
 359 }
 360 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 361 {
 362         int bg, en, temp, i;
 363
 364         //if (hexcnt % 2)
 365         //      return 1;
 366
 367         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 368
 369         *hexcnt = en - bg + 1;
 370         if (*hexcnt % 2) //error if not complete hex bytes
 371                 return 1;
 372
 373         for(i = 0; i < *hexcnt; i += 2) {
 374                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 375
 376                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 377                 data[i / 2] = temp & 0xff;
 378         }
 379
 380         return 0;
 381 }
 382 int param_getstr(const char *line, int paramnum, char * str)
 383 {
 384         int bg, en;
 385
 386         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 387
 388         memcpy(str, line + bg, en - bg + 1);
 389         str[en - bg + 1] = 0;
 390
 391         return en - bg + 1;
 392 }
 393
 394 /*
 395 The following methods comes from Rfidler sourcecode.
 396 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 397 */
 398
 399 // convert hex to sequence of 0/1 bit values
 400 // returns number of bits converted
 401 int hextobinarray(char *target, char *source)
 402 {
 403     int length, i, count= 0;
 404     char x;
 405
 406     length = strlen(source);
 407     // process 4 bits (1 hex digit) at a time
 408     while(length--)
 409     {
 410         x= *(source++);
 411         // capitalize
 412         if (x >= 'a' && x <= 'f')
 413             x -= 32;
 414         // convert to numeric value
 415         if (x >= '0' && x <= '9')
 416             x -= '0';
 417         else if (x >= 'A' && x <= 'F')
 418             x -= 'A' - 10;
 419         else
 420             return 0;
 421         // output
 422         for(i= 0 ; i < 4 ; ++i, ++count)
 423             *(target++)= (x >> (3 - i)) & 1;
 424     }
 425
 426     return count;
 427 }
 428
 429 // convert hex to human readable binary string
 430 int hextobinstring(char *target, char *source)
 431 {
 432     int length;
 433
 434     if(!(length= hextobinarray(target, source)))
 435         return 0;
 436     binarraytobinstring(target, target, length);
 437     return length;
 438 }
 439
 440 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 441 // return number of bits converted
 442 int binarraytohex(char *target,char *source, int length)
 443 {
 444     unsigned char i, x;
 445     int j = length;
 446
 447     if(j % 4)
 448         return 0;
 449
 450     while(j)
 451     {
 452         for(i= x= 0 ; i < 4 ; ++i)
 453             x +=  ( source[i] << (3 - i));
 454         sprintf(target,"%X", (unsigned int)x);
 455         ++target;
 456         source += 4;
 457         j -= 4;
 458     }
 459     return length;
 460 }
 461
 462 // convert binary array to human readable binary
 463 void binarraytobinstring(char *target, char *source,  int length)
 464 {
 465     int i;
 466
 467     for(i= 0 ; i < length ; ++i)
 468         *(target++)= *(source++) + '0';
 469     *target= '\0';
 470 }
 471
 472 // return parity bit required to match type
 473 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 474 {
 475     int x;
 476
 477     for(x= 0 ; length > 0 ; --length)
 478         x += bits[length - 1];
 479     x %= 2;
 480
 481     return x ^ type;
 482 }
 483
 484 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 485 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 486 {
 487     *(target++)= GetParity(source, EVEN, length / 2);
 488     memcpy(target, source, length);
 489     target += length;
 490     *(target)= GetParity(source + length / 2, ODD, length / 2);
 491 }
 492
 493 void xor(unsigned char *dst, unsigned char *src, size_t len) {
 494    for( ; len > 0; len--,dst++,src++)
 495        *dst ^= *src;
 496 }
 497
 498 int32_t le24toh (uint8_t data[3]) {
 499     return (data[2] << 16) | (data[1] << 8) | data[0];
 500 }
 501
 502 // RotateLeft - Ultralight, Desfire, works on byte level
 503 // 00-01-02  >> 01-02-00
 504 void rol(uint8_t *data, const size_t len){
 505     uint8_t first = data[0];
 506     for (size_t i = 0; i < len-1; i++) {
 507         data[i] = data[i+1];
 508     }
 509     data[len-1] = first;
 510 }