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 int ukbhit(void)
  19 {
  20   int cnt = 0;
  21   int error;
  22   static struct termios Otty, Ntty;
  23
  24   if ( tcgetattr( 0, &Otty) == -1) return -1;
  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         // make sure we don't go beyond our char array memory
 127         int max_len;
 128         if (breaks==0)
 129                 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
 130         else
 131                 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
 132
 133         static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
 134         //clear memory
 135         memset(buf, 0x00, sizeof(buf));
 136         char *tmp = buf;
 137
 138         size_t in_index = 0;
 139         // loop through the out_index to make sure we don't go too far
 140         for (size_t out_index=0; out_index < max_len-2; out_index++) {
 141                 // set character
 142                 sprintf(tmp++, "%u", data[in_index]);
 143                 // check if a line break is needed and we have room to print it in our array
 144                 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
 145                         // increment and print line break
 146                         out_index++;
 147                         sprintf(tmp++, "%s","\n");
 148         }
 149                 in_index++;
 150         }
 151
 152         return buf;
 153 }
 154
 155 char *sprint_bin(const uint8_t *data, const size_t len) {
 156         return sprint_bin_break(data, len, 0);
 157 }
 158
 159 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
 160         static char buf[1024];
 161         memset(buf, 0x00, 1024);
 162         char *tmp = buf;
 163         sprintf(tmp, "%s| %s", sprint_hex(data, len) , data);
 164         return buf;
 165 }
 166 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 167 {
 168         while (len--) {
 169                 dest[len] = (uint8_t) n;
 170                 n >>= 8;
 171         }
 172 }
 173
 174 uint64_t bytes_to_num(uint8_t* src, size_t len)
 175 {
 176         uint64_t num = 0;
 177         while (len--)
 178         {
 179                 num = (num << 8) | (*src);
 180                 src++;
 181         }
 182         return num;
 183 }
 184
 185 void num_to_bytebits(uint64_t   n, size_t len, uint8_t *dest) {
 186         while (len--) {
 187                 dest[len] = n & 1;
 188                 n >>= 1;
 189         }
 190 }
 191
 192 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 193 // to
 194 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 195 // up to 64 bytes or 512 bits
 196 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
 197         uint8_t buf[64];
 198         memset(buf, 0x00, 64);
 199         uint8_t *tmp = buf;
 200         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 201                 for (size_t i = 0; i < blockSize; i++){
 202                         tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 203                 }
 204         }
 205         return tmp;
 206 }
 207
 208 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
 209         for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
 210                 for (size_t i = 0; i < blockSize; i++){
 211                         dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 212                 }
 213         }
 214 }
 215
 216
 217 //  -------------------------------------------------------------------------
 218 //  string parameters lib
 219 //  -------------------------------------------------------------------------
 220
 221 //  -------------------------------------------------------------------------
 222 //  line     - param line
 223 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 224 //  paramnum - param number (from 0)
 225 //  -------------------------------------------------------------------------
 226 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 227 {
 228         int i;
 229         int len = strlen(line);
 230
 231         *bg = 0;
 232         *en = 0;
 233
 234   // skip spaces
 235         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 236         if (*bg >= len) {
 237                 return 1;
 238         }
 239
 240         for (i = 0; i < paramnum; i++) {
 241                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 242                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 243
 244                 if (line[*bg] == '\0') return 1;
 245         }
 246
 247         *en = *bg;
 248         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 249
 250         (*en)--;
 251
 252         return 0;
 253 }
 254
 255
 256 char param_getchar(const char *line, int paramnum)
 257 {
 258         int bg, en;
 259
 260         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 261
 262         return line[bg];
 263 }
 264
 265 uint8_t param_get8(const char *line, int paramnum)
 266 {
 267         return param_get8ex(line, paramnum, 0, 10);
 268 }
 269
 270 /**
 271  * @brief Reads a decimal integer (actually, 0-254, not 255)
 272  * @param line
 273  * @param paramnum
 274  * @return -1 if error
 275  */
 276 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
 277 {
 278         uint8_t val =  param_get8ex(line, paramnum, 255, 10);
 279         if( (int8_t) val == -1) return 1;
 280         (*destination) = val;
 281         return 0;
 282 }
 283 /**
 284  * @brief Checks if param is decimal
 285  * @param line
 286  * @param paramnum
 287  * @return
 288  */
 289 uint8_t param_isdec(const char *line, int paramnum)
 290 {
 291         int bg, en;
 292         //TODO, check more thorougly
 293         if (!param_getptr(line, &bg, &en, paramnum)) return 1;
 294                 //              return strtoul(&line[bg], NULL, 10) & 0xff;
 295
 296         return 0;
 297 }
 298
 299 uint8_t param_get8ex(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 strtoul(&line[bg], NULL, base) & 0xff;
 305         else
 306                 return deflt;
 307 }
 308
 309 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 310 {
 311         int bg, en;
 312
 313         if (!param_getptr(line, &bg, &en, paramnum))
 314                 return strtoul(&line[bg], NULL, base);
 315         else
 316                 return deflt;
 317 }
 318
 319 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 320 {
 321         int bg, en;
 322
 323         if (!param_getptr(line, &bg, &en, paramnum))
 324                 return strtoull(&line[bg], NULL, base);
 325         else
 326                 return deflt;
 327
 328         return 0;
 329 }
 330
 331 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 332 {
 333         int bg, en, temp, i;
 334
 335         if (hexcnt & 1) return 1;
 336
 337         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 338
 339         if (en - bg + 1 != hexcnt) return 1;
 340
 341         for(i = 0; i < hexcnt; i += 2) {
 342                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 343
 344                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 345                 data[i / 2] = temp & 0xff;
 346         }
 347
 348         return 0;
 349 }
 350 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 351 {
 352         int bg, en, temp, i;
 353
 354         //if (hexcnt % 2)
 355         //      return 1;
 356
 357         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 358
 359         *hexcnt = en - bg + 1;
 360         if (*hexcnt % 2) //error if not complete hex bytes
 361                 return 1;
 362
 363         for(i = 0; i < *hexcnt; i += 2) {
 364                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
 365
 366                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 367                 data[i / 2] = temp & 0xff;
 368         }
 369
 370         return 0;
 371 }
 372 int param_getstr(const char *line, int paramnum, char * str)
 373 {
 374         int bg, en;
 375
 376         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 377
 378         memcpy(str, line + bg, en - bg + 1);
 379         str[en - bg + 1] = 0;
 380
 381         return en - bg + 1;
 382 }
 383
 384 /*
 385 The following methods comes from Rfidler sourcecode.
 386 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 387 */
 388
 389 // convert hex to sequence of 0/1 bit values
 390 // returns number of bits converted
 391 int hextobinarray(char *target, char *source)
 392 {
 393     int length, i, count= 0;
 394     char x;
 395
 396     length = strlen(source);
 397     // process 4 bits (1 hex digit) at a time
 398     while(length--)
 399     {
 400         x= *(source++);
 401         // capitalize
 402         if (x >= 'a' && x <= 'f')
 403             x -= 32;
 404         // convert to numeric value
 405         if (x >= '0' && x <= '9')
 406             x -= '0';
 407         else if (x >= 'A' && x <= 'F')
 408             x -= 'A' - 10;
 409         else
 410             return 0;
 411         // output
 412         for(i= 0 ; i < 4 ; ++i, ++count)
 413             *(target++)= (x >> (3 - i)) & 1;
 414     }
 415
 416     return count;
 417 }
 418
 419 // convert hex to human readable binary string
 420 int hextobinstring(char *target, char *source)
 421 {
 422     int length;
 423
 424     if(!(length= hextobinarray(target, source)))
 425         return 0;
 426     binarraytobinstring(target, target, length);
 427     return length;
 428 }
 429
 430 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 431 // return number of bits converted
 432 int binarraytohex(char *target, char *source, int length)
 433 {
 434     unsigned char i, x;
 435     int j = length;
 436
 437     if(j % 4)
 438         return 0;
 439
 440     while(j)
 441     {
 442         for(i= x= 0 ; i < 4 ; ++i)
 443             x +=  ( source[i] << (3 - i));
 444         sprintf(target,"%X", x);
 445         ++target;
 446         source += 4;
 447         j -= 4;
 448     }
 449     return length;
 450 }
 451
 452 // convert binary array to human readable binary
 453 void binarraytobinstring(char *target, char *source,  int length)
 454 {
 455     int i;
 456
 457     for(i= 0 ; i < length ; ++i)
 458         *(target++)= *(source++) + '0';
 459     *target= '\0';
 460 }
 461
 462 // return parity bit required to match type
 463 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 464 {
 465     int x;
 466     for( x = 0 ; length > 0 ; --length)
 467         x += bits[length - 1];
 468     x %= 2;
 469     return x ^ type;
 470 }
 471
 472 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 473 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
 474 {
 475     *(target++)= GetParity(source, EVEN, length / 2);
 476     memcpy(target, source, length);
 477     target += length;
 478     *(target)= GetParity(source + length / 2, ODD, length / 2);
 479 }
 480
 481 void xor(unsigned char * dst, unsigned char * src, size_t len) {
 482    for( ; len > 0; len--,dst++,src++)
 483        *dst ^= *src;
 484 }
 485
 486 int32_t le24toh (uint8_t data[3]) {
 487     return (data[2] << 16) | (data[1] << 8) | data[0];
 488 }
 489
 490 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 491
 492         if (len > 32) return 0;
 493
 494         int i = start;
 495         int j = len-1;
 496         uint32_t tmp = 0;
 497
 498         for (; j >= 0; --j, ++i)
 499                 tmp     |= bits[i] << j;
 500
 501         return tmp;
 502 }
 503
 504 // RotateLeft - Ultralight, Desfire, works on byte level
 505 // 00-01-02  >> 01-02-00
 506 void rol(uint8_t *data, const size_t len){
 507     uint8_t first = data[0];
 508     for (size_t i = 0; i < len-1; i++) {
 509         data[i] = data[i+1];
 510     }
 511     data[len-1] = first;
 512 }