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