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 #ifndef _WIN32
  14 #include <termios.h>
  15 #include <sys/ioctl.h>
  16
  17 int ukbhit(void)
  18 {
  19   int cnt = 0;
  20   int error;
  21   static struct termios Otty, Ntty;
  22
  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         char * tmp = buf;
 116         size_t i;
 117
 118         for (i=0; i < maxLen; ++i, tmp += 3)
 119                 sprintf(tmp, "%02x ", data[i]);
 120
 121         return buf;
 122 }
 123
 124 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
 125
 126         int maxLen = ( len > 1024) ? 1024 : len;
 127         static char buf[1024];
 128         char *tmp = buf;
 129
 130         for (size_t i=0; i < maxLen; ++i){
 131                 sprintf(tmp++, "%u", data[i]);
 132                 if (breaks > 0 && !((i+1) % breaks))
 133                         sprintf(tmp++, "%s","\n");
 134         }
 135
 136         return buf;
 137 }
 138
 139 char *sprint_bin(const uint8_t *data, const size_t len) {
 140         return sprint_bin_break(data, len, 0);
 141 }
 142 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 143 {
 144         while (len--) {
 145                 dest[len] = (uint8_t) n;
 146                 n >>= 8;
 147         }
 148 }
 149
 150 uint64_t bytes_to_num(uint8_t* src, size_t len)
 151 {
 152         uint64_t num = 0;
 153         while (len--)
 154         {
 155                 num = (num << 8) | (*src);
 156                 src++;
 157         }
 158         return num;
 159 }
 160
 161 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 162 // to
 163 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 164 // up to 64 bytes or 512 bits
 165 uint8_t *SwapEndian64(uint8_t *src, size_t len){
 166         static uint8_t temp[64]={0};
 167         for (uint8_t block=0; block < (uint8_t)len/8; block++){
 168                 for (size_t i = 0; i < 8; i++){
 169                         temp[i+(8*block)] = src[(7-i)+(8*block)];
 170                 }
 171         }
 172         return temp;
 173 }
 174
 175 //assumes little endian
 176 char * printBits(size_t const size, void const * const ptr)
 177 {
 178     unsigned char *b = (unsigned char*) ptr;
 179     unsigned char byte;
 180         static char buf[1024];
 181         char * tmp = buf;
 182     int i, j;
 183
 184     for (i=size-1;i>=0;i--)
 185     {
 186         for (j=7;j>=0;j--)
 187         {
 188             byte = b[i] & (1<<j);
 189             byte >>= j;
 190             sprintf(tmp, "%u", byte);
 191                         tmp++;
 192         }
 193     }
 194         return buf;
 195 }
 196
 197 //  -------------------------------------------------------------------------
 198 //  string parameters lib
 199 //  -------------------------------------------------------------------------
 200
 201 //  -------------------------------------------------------------------------
 202 //  line     - param line
 203 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 204 //  paramnum - param number (from 0)
 205 //  -------------------------------------------------------------------------
 206 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 207 {
 208         int i;
 209         int len = strlen(line);
 210
 211         *bg = 0;
 212         *en = 0;
 213
 214   // skip spaces
 215         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 216         if (*bg >= len) {
 217                 return 1;
 218         }
 219
 220         for (i = 0; i < paramnum; i++) {
 221                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 222                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 223
 224                 if (line[*bg] == '\0') return 1;
 225         }
 226
 227         *en = *bg;
 228         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 229
 230         (*en)--;
 231
 232         return 0;
 233 }
 234
 235
 236 char param_getchar(const char *line, int paramnum)
 237 {
 238         int bg, en;
 239
 240         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 241
 242         return line[bg];
 243 }
 244
 245 uint8_t param_get8(const char *line, int paramnum)
 246 {
 247         return param_get8ex(line, paramnum, 10, 0);
 248 }
 249
 250 /**
 251  * @brief Reads a decimal integer (actually, 0-254, not 255)
 252  * @param line
 253  * @param paramnum
 254  * @return -1 if error
 255  */
 256 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 257 {
 258         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 259         if( (int8_t) val == -1) return 1;
 260         (*destination) = val;
 261         return 0;
 262 }
 263 /**
 264  * @brief Checks if param is decimal
 265  * @param line
 266  * @param paramnum
 267  * @return
 268  */
 269 uint8_t param_isdec(const char *line, int paramnum)
 270 {
 271         int bg, en;
 272         //TODO, check more thorougly
 273         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 274                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 275
 276         return 0;
 277 }
 278
 279 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 280 {
 281         int bg, en;
 282
 283         if (!param_getptr(line, &bg, &en, paramnum))
 284                 return strtoul(&line[bg], NULL, base) & 0xff;
 285         else
 286                 return deflt;
 287 }
 288
 289 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 290 {
 291         int bg, en;
 292
 293         if (!param_getptr(line, &bg, &en, paramnum))
 294                 return strtoul(&line[bg], NULL, base);
 295         else
 296                 return deflt;
 297 }
 298
 299 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 300 {
 301         int bg, en;
 302
 303         if (!param_getptr(line, &bg, &en, paramnum))
 304                 return strtoull(&line[bg], NULL, base);
 305         else
 306                 return deflt;
 307
 308         return 0;
 309 }
 310
 311 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 312 {
 313         int bg, en, temp, i;
 314
 315         if (hexcnt % 2)
 316                 return 1;
 317
 318         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 319
 320         if (en - bg + 1 != hexcnt)
 321                 return 1;
 322
 323         for(i = 0; i < hexcnt; i += 2) {
 324                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 325
 326                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 327                 data[i / 2] = temp & 0xff;
 328         }
 329
 330         return 0;
 331 }
 332
 333 int param_getstr(const char *line, int paramnum, char * str)
 334 {
 335         int bg, en;
 336
 337         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 338
 339         memcpy(str, line + bg, en - bg + 1);
 340         str[en - bg + 1] = 0;
 341
 342         return en - bg + 1;
 343 }
 344
 345 /*
 346 The following methods comes from Rfidler sourcecode.
 347 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 348 */
 349
 350 // convert hex to sequence of 0/1 bit values
 351 // returns number of bits converted
 352 int hextobinarray(char *target, char *source)
 353 {
 354     int length, i, count= 0;
 355     char x;
 356
 357     length = strlen(source);
 358     // process 4 bits (1 hex digit) at a time
 359     while(length--)
 360     {
 361         x= *(source++);
 362         // capitalize
 363         if (x >= 'a' && x <= 'f')
 364             x -= 32;
 365         // convert to numeric value
 366         if (x >= '0' && x <= '9')
 367             x -= '0';
 368         else if (x >= 'A' && x <= 'F')
 369             x -= 'A' - 10;
 370         else
 371             return 0;
 372         // output
 373         for(i= 0 ; i < 4 ; ++i, ++count)
 374             *(target++)= (x >> (3 - i)) & 1;
 375     }
 376
 377     return count;
 378 }
 379
 380 // convert hex to human readable binary string
 381 int hextobinstring(char *target, char *source)
 382 {
 383     int length;
 384
 385     if(!(length= hextobinarray(target, source)))
 386         return 0;
 387     binarraytobinstring(target, target, length);
 388     return length;
 389 }
 390
 391 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 392 // return number of bits converted
 393 int binarraytohex(char *target, char *source, int length)
 394 {
 395     unsigned char i, x;
 396     int j = length;
 397
 398     if(j % 4)
 399         return 0;
 400
 401     while(j)
 402     {
 403         for(i= x= 0 ; i < 4 ; ++i)
 404             x +=  ( source[i] << (3 - i));
 405         sprintf(target,"%X", x);
 406         ++target;
 407         source += 4;
 408         j -= 4;
 409     }
 410     return length;
 411 }
 412
 413 // convert binary array to human readable binary
 414 void binarraytobinstring(char *target, char *source,  int length)
 415 {
 416     int i;
 417
 418     for(i= 0 ; i < length ; ++i)
 419         *(target++)= *(source++) + '0';
 420     *target= '\0';
 421 }
 422
 423 // return parity bit required to match type
 424 uint8_t GetParity( char *bits, uint8_t type, int length)
 425 {
 426     int x;
 427
 428     for(x= 0 ; length > 0 ; --length)
 429         x += bits[length - 1];
 430     x %= 2;
 431
 432     return x ^ type;
 433 }
 434
 435 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 436 void wiegand_add_parity(char *target, char *source, char length)
 437 {
 438     *(target++)= GetParity(source, EVEN, length / 2);
 439     memcpy(target, source, length);
 440     target += length;
 441     *(target)= GetParity(source + length / 2, ODD, length / 2);
 442 }