cvs.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   tcgetattr( 0, &Otty);
  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", 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 ", 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
 144                 sprintf(tmp++, "%u", data[in_index]);
 145                 // check if a line break is needed and we have room to print it in our array
 146                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 147                         // increment and print line break
 148                         out_index++;
 149                         sprintf(tmp++, "%s","\n");
 150                 }
 151                 in_index++;
 152         }
 153
 154         return buf;
 155 }
 156
 157 char *sprint_bin(const uint8_t *data, const size_t len) {
 158         return sprint_bin_break(data, len, 0);
 159 }
 160 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 161 {
 162         while (len--) {
 163                 dest[len] = (uint8_t) n;
 164                 n >>= 8;
 165         }
 166 }
 167
 168 uint64_t bytes_to_num(uint8_t* src, size_t len)
 169 {
 170         uint64_t num = 0;
 171         while (len--)
 172         {
 173                 num = (num << 8) | (*src);
 174                 src++;
 175         }
 176         return num;
 177 }
 178
 179 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 180         while (len--) {
 181                 dest[len] = n & 1;
 182                 n >>= 1;
 183         }
 184 }
 185
 186 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 187 // to
 188 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 189 // up to 64 bytes or 512 bits
 190 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 191         static uint8_t buf[64];
 192         memset(buf, 0x00, 64);
 193         uint8_t *tmp = buf;
 194         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 195                 for (size_t i = 0; i < blockSize; i++){
 196                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 197                 }
 198         }
 199         return tmp;
 200 }
 201
 202 //assumes little endian
 203 char * printBits(size_t const size, void const * const ptr)
 204 {
 205     unsigned char *b = (unsigned char*) ptr;
 206     unsigned char byte;
 207         static char buf[1024];
 208         char * tmp = buf;
 209     int i, j;
 210
 211     for (i=size-1;i>=0;i--)
 212     {
 213         for (j=7;j>=0;j--)
 214         {
 215             byte = b[i] & (1<<j);
 216             byte >>= j;
 217             sprintf(tmp, "%u", byte);
 218                         tmp++;
 219         }
 220     }
 221         return buf;
 222 }
 223
 224 //  -------------------------------------------------------------------------
 225 //  string parameters lib
 226 //  -------------------------------------------------------------------------
 227
 228 //  -------------------------------------------------------------------------
 229 //  line     - param line
 230 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 231 //  paramnum - param number (from 0)
 232 //  -------------------------------------------------------------------------
 233 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 234 {
 235         int i;
 236         int len = strlen(line);
 237
 238         *bg = 0;
 239         *en = 0;
 240
 241   // skip spaces
 242         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 243         if (*bg >= len) {
 244                 return 1;
 245         }
 246
 247         for (i = 0; i < paramnum; i++) {
 248                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 249                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 250
 251                 if (line[*bg] == '\0') return 1;
 252         }
 253
 254         *en = *bg;
 255         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 256
 257         (*en)--;
 258
 259         return 0;
 260 }
 261
 262
 263 char param_getchar(const char *line, int paramnum)
 264 {
 265         int bg, en;
 266
 267         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 268
 269         return line[bg];
 270 }
 271
 272 uint8_t param_get8(const char *line, int paramnum)
 273 {
 274         return param_get8ex(line, paramnum, 0, 10);
 275 }
 276
 277 /**
 278  * @brief Reads a decimal integer (actually, 0-254, not 255)
 279  * @param line
 280  * @param paramnum
 281  * @return -1 if error
 282  */
 283 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 284 {
 285         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 286         if( (int8_t) val == -1) return 1;
 287         (*destination) = val;
 288         return 0;
 289 }
 290 /**
 291  * @brief Checks if param is decimal
 292  * @param line
 293  * @param paramnum
 294  * @return
 295  */
 296 uint8_t param_isdec(const char *line, int paramnum)
 297 {
 298         int bg, en;
 299         //TODO, check more thorougly
 300         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 301                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 302
 303         return 0;
 304 }
 305
 306 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 307 {
 308         int bg, en;
 309
 310         if (!param_getptr(line, &bg, &en, paramnum))
 311                 return strtoul(&line[bg], NULL, base) & 0xff;
 312         else
 313                 return deflt;
 314 }
 315
 316 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 317 {
 318         int bg, en;
 319
 320         if (!param_getptr(line, &bg, &en, paramnum))
 321                 return strtoul(&line[bg], NULL, base);
 322         else
 323                 return deflt;
 324 }
 325
 326 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 327 {
 328         int bg, en;
 329
 330         if (!param_getptr(line, &bg, &en, paramnum))
 331                 return strtoull(&line[bg], NULL, base);
 332         else
 333                 return deflt;
 334
 335         return 0;
 336 }
 337
 338 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 339 {
 340         int bg, en, temp, i;
 341
 342         if (hexcnt % 2)
 343                 return 1;
 344
 345         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 346
 347         if (en - bg + 1 != hexcnt)
 348                 return 1;
 349
 350         for(i = 0; i < hexcnt; i += 2) {
 351                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 352
 353                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 354                 data[i / 2] = temp & 0xff;
 355         }
 356
 357         return 0;
 358 }
 359 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 360 {
 361         int bg, en, temp, i;
 362
 363         //if (hexcnt % 2)
 364         //      return 1;
 365
 366         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 367
 368         *hexcnt = en - bg + 1;
 369         if (*hexcnt % 2) //error if not complete hex bytes
 370                 return 1;
 371
 372         for(i = 0; i < *hexcnt; i += 2) {
 373                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 374
 375                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 376                 data[i / 2] = temp & 0xff;
 377         }
 378
 379         return 0;
 380 }
 381 int param_getstr(const char *line, int paramnum, char * str)
 382 {
 383         int bg, en;
 384
 385         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 386
 387         memcpy(str, line + bg, en - bg + 1);
 388         str[en - bg + 1] = 0;
 389
 390         return en - bg + 1;
 391 }
 392
 393 /*
 394 The following methods comes from Rfidler sourcecode.
 395 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 396 */
 397
 398 // convert hex to sequence of 0/1 bit values
 399 // returns number of bits converted
 400 int hextobinarray(char *target, char *source)
 401 {
 402     int length, i, count= 0;
 403     char x;
 404
 405     length = strlen(source);
 406     // process 4 bits (1 hex digit) at a time
 407     while(length--)
 408     {
 409         x= *(source++);
 410         // capitalize
 411         if (x >= 'a' && x <= 'f')
 412             x -= 32;
 413         // convert to numeric value
 414         if (x >= '0' && x <= '9')
 415             x -= '0';
 416         else if (x >= 'A' && x <= 'F')
 417             x -= 'A' - 10;
 418         else
 419             return 0;
 420         // output
 421         for(i= 0 ; i < 4 ; ++i, ++count)
 422             *(target++)= (x >> (3 - i)) & 1;
 423     }
 424
 425     return count;
 426 }
 427
 428 // convert hex to human readable binary string
 429 int hextobinstring(char *target, char *source)
 430 {
 431     int length;
 432
 433     if(!(length= hextobinarray(target, source)))
 434         return 0;
 435     binarraytobinstring(target, target, length);
 436     return length;
 437 }
 438
 439 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 440 // return number of bits converted
 441 int binarraytohex(char *target,char *source, int length)
 442 {
 443     unsigned char i, x;
 444     int j = length;
 445
 446     if(j % 4)
 447         return 0;
 448
 449     while(j)
 450     {
 451         for(i= x= 0 ; i < 4 ; ++i)
 452             x +=  ( source[i] << (3 - i));
 453         sprintf(target,"%X", x);
 454         ++target;
 455         source += 4;
 456         j -= 4;
 457     }
 458     return length;
 459 }
 460
 461 // convert binary array to human readable binary
 462 void binarraytobinstring(char *target, char *source,  int length)
 463 {
 464     int i;
 465
 466     for(i= 0 ; i < length ; ++i)
 467         *(target++)= *(source++) + '0';
 468     *target= '\0';
 469 }
 470
 471 // return parity bit required to match type
 472 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 473 {
 474     int x;
 475
 476     for(x= 0 ; length > 0 ; --length)
 477         x += bits[length - 1];
 478     x %= 2;
 479
 480     return x ^ type;
 481 }
 482
 483 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 484 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 485 {
 486     *(target++)= GetParity(source, EVEN, length / 2);
 487     memcpy(target, source, length);
 488     target += length;
 489     *(target)= GetParity(source + length / 2, ODD, length / 2);
 490 }
 491
 492 void xor(unsigned char *dst, unsigned char *src, size_t len) {
 493    for( ; len > 0; len--,dst++,src++)
 494        *dst ^= *src;
 495 }
 496
 497 int32_t le24toh (uint8_t data[3]) {
 498     return (data[2] << 16) | (data[1] << 8) | data[0];
 499 }
 500
 501 // RotateLeft - Ultralight, Desfire, works on byte level
 502 // 00-01-02  >> 01-02-00
 503 void rol(uint8_t *data, const size_t len){
 504     uint8_t first = data[0];
 505     for (size_t i = 0; i < len-1; i++) {
 506         data[i] = data[i+1];
 507     }
 508     data[len-1] = first;
 509 }