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         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
 127         int maxLen = ( len > 1020) ? 1020 : len;
 128         static char buf[1024];
 129         memset(buf, 0x00, 1024);
 130         char *tmp = buf;
 131
 132         for (size_t i=0; i < maxLen; ++i){
 133                 sprintf(tmp++, "%u", data[i]);
 134                 if (breaks > 0 && !((i+1) % breaks))
 135                         sprintf(tmp++, "%s","\n");
 136         }
 137
 138         return buf;
 139 }
 140
 141 char *sprint_bin(const uint8_t *data, const size_t len) {
 142         return sprint_bin_break(data, len, 0);
 143 }
 144 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 145 {
 146         while (len--) {
 147                 dest[len] = (uint8_t) n;
 148                 n >>= 8;
 149         }
 150 }
 151
 152 uint64_t bytes_to_num(uint8_t* src, size_t len)
 153 {
 154         uint64_t num = 0;
 155         while (len--)
 156         {
 157                 num = (num << 8) | (*src);
 158                 src++;
 159         }
 160         return num;
 161 }
 162
 163 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 164 // to
 165 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 166 // up to 64 bytes or 512 bits
 167 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 168         static uint8_t buf[64];
 169         memset(buf, 0x00, 64);
 170         uint8_t *tmp = buf;
 171         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 172                 for (size_t i = 0; i < blockSize; i++){
 173                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 174                 }
 175         }
 176         return tmp;
 177 }
 178
 179 //assumes little endian
 180 char * printBits(size_t const size, void const * const ptr)
 181 {
 182     unsigned char *b = (unsigned char*) ptr;
 183     unsigned char byte;
 184         static char buf[1024];
 185         char * tmp = buf;
 186     int i, j;
 187
 188     for (i=size-1;i>=0;i--)
 189     {
 190         for (j=7;j>=0;j--)
 191         {
 192             byte = b[i] & (1<<j);
 193             byte >>= j;
 194             sprintf(tmp, "%u", byte);
 195                         tmp++;
 196         }
 197     }
 198         return buf;
 199 }
 200
 201 //  -------------------------------------------------------------------------
 202 //  string parameters lib
 203 //  -------------------------------------------------------------------------
 204
 205 //  -------------------------------------------------------------------------
 206 //  line     - param line
 207 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 208 //  paramnum - param number (from 0)
 209 //  -------------------------------------------------------------------------
 210 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 211 {
 212         int i;
 213         int len = strlen(line);
 214
 215         *bg = 0;
 216         *en = 0;
 217
 218   // skip spaces
 219         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 220         if (*bg >= len) {
 221                 return 1;
 222         }
 223
 224         for (i = 0; i < paramnum; i++) {
 225                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 226                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 227
 228                 if (line[*bg] == '\0') return 1;
 229         }
 230
 231         *en = *bg;
 232         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 233
 234         (*en)--;
 235
 236         return 0;
 237 }
 238
 239
 240 char param_getchar(const char *line, int paramnum)
 241 {
 242         int bg, en;
 243
 244         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 245
 246         return line[bg];
 247 }
 248
 249 uint8_t param_get8(const char *line, int paramnum)
 250 {
 251         return param_get8ex(line, paramnum, 10, 0);
 252 }
 253
 254 /**
 255  * @brief Reads a decimal integer (actually, 0-254, not 255)
 256  * @param line
 257  * @param paramnum
 258  * @return -1 if error
 259  */
 260 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 261 {
 262         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 263         if( (int8_t) val == -1) return 1;
 264         (*destination) = val;
 265         return 0;
 266 }
 267 /**
 268  * @brief Checks if param is decimal
 269  * @param line
 270  * @param paramnum
 271  * @return
 272  */
 273 uint8_t param_isdec(const char *line, int paramnum)
 274 {
 275         int bg, en;
 276         //TODO, check more thorougly
 277         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 278                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 279
 280         return 0;
 281 }
 282
 283 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 284 {
 285         int bg, en;
 286
 287         if (!param_getptr(line, &bg, &en, paramnum))
 288                 return strtoul(&line[bg], NULL, base) & 0xff;
 289         else
 290                 return deflt;
 291 }
 292
 293 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 294 {
 295         int bg, en;
 296
 297         if (!param_getptr(line, &bg, &en, paramnum))
 298                 return strtoul(&line[bg], NULL, base);
 299         else
 300                 return deflt;
 301 }
 302
 303 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 304 {
 305         int bg, en;
 306
 307         if (!param_getptr(line, &bg, &en, paramnum))
 308                 return strtoull(&line[bg], NULL, base);
 309         else
 310                 return deflt;
 311
 312         return 0;
 313 }
 314
 315 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 316 {
 317         int bg, en, temp, i;
 318
 319         if (hexcnt % 2)
 320                 return 1;
 321
 322         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 323
 324         if (en - bg + 1 != hexcnt)
 325                 return 1;
 326
 327         for(i = 0; i < hexcnt; i += 2) {
 328                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 329
 330                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 331                 data[i / 2] = temp & 0xff;
 332         }
 333
 334         return 0;
 335 }
 336
 337 int param_getstr(const char *line, int paramnum, char * str)
 338 {
 339         int bg, en;
 340
 341         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 342
 343         memcpy(str, line + bg, en - bg + 1);
 344         str[en - bg + 1] = 0;
 345
 346         return en - bg + 1;
 347 }
 348
 349 /*
 350 The following methods comes from Rfidler sourcecode.
 351 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 352 */
 353
 354 // convert hex to sequence of 0/1 bit values
 355 // returns number of bits converted
 356 int hextobinarray(char *target, char *source)
 357 {
 358     int length, i, count= 0;
 359     char x;
 360
 361     length = strlen(source);
 362     // process 4 bits (1 hex digit) at a time
 363     while(length--)
 364     {
 365         x= *(source++);
 366         // capitalize
 367         if (x >= 'a' && x <= 'f')
 368             x -= 32;
 369         // convert to numeric value
 370         if (x >= '0' && x <= '9')
 371             x -= '0';
 372         else if (x >= 'A' && x <= 'F')
 373             x -= 'A' - 10;
 374         else
 375             return 0;
 376         // output
 377         for(i= 0 ; i < 4 ; ++i, ++count)
 378             *(target++)= (x >> (3 - i)) & 1;
 379     }
 380
 381     return count;
 382 }
 383
 384 // convert hex to human readable binary string
 385 int hextobinstring(char *target, char *source)
 386 {
 387     int length;
 388
 389     if(!(length= hextobinarray(target, source)))
 390         return 0;
 391     binarraytobinstring(target, target, length);
 392     return length;
 393 }
 394
 395 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 396 // return number of bits converted
 397 int binarraytohex(char *target, char *source, int length)
 398 {
 399     unsigned char i, x;
 400     int j = length;
 401
 402     if(j % 4)
 403         return 0;
 404
 405     while(j)
 406     {
 407         for(i= x= 0 ; i < 4 ; ++i)
 408             x +=  ( source[i] << (3 - i));
 409         sprintf(target,"%X", x);
 410         ++target;
 411         source += 4;
 412         j -= 4;
 413     }
 414     return length;
 415 }
 416
 417 // convert binary array to human readable binary
 418 void binarraytobinstring(char *target, char *source,  int length)
 419 {
 420     int i;
 421
 422     for(i= 0 ; i < length ; ++i)
 423         *(target++)= *(source++) + '0';
 424     *target= '\0';
 425 }
 426
 427 // return parity bit required to match type
 428 uint8_t GetParity( char *bits, uint8_t type, int length)
 429 {
 430     int x;
 431
 432     for(x= 0 ; length > 0 ; --length)
 433         x += bits[length - 1];
 434     x %= 2;
 435
 436     return x ^ type;
 437 }
 438
 439 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 440 void wiegand_add_parity(char *target, char *source, char length)
 441 {
 442     *(target++)= GetParity(source, EVEN, length / 2);
 443     memcpy(target, source, length);
 444     target += length;
 445     *(target)= GetParity(source + length / 2, ODD, length / 2);
 446 }
 447
 448 void xor(unsigned char *dst, unsigned char *src, size_t len) {
 449    for( ; len > 0; len--,dst++,src++)
 450        *dst ^= *src;
 451 }
 452
 453 int32_t le24toh (uint8_t data[3]) {
 454     return (data[2] << 16) | (data[1] << 8) | data[0];
 455 }