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(const uint8_t * data, const size_t len) {
 125
 126         int maxLen = ( len > 1024) ? 1024 : len;
 127         static char buf[1024];
 128         char * tmp = buf;
 129         size_t i;
 130
 131         for (i=0; i < maxLen; ++i, ++tmp)
 132                 sprintf(tmp, "%u", data[i]);
 133
 134         return buf;
 135 }
 136
 137 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 138 {
 139         while (len--) {
 140                 dest[len] = (uint8_t) n;
 141                 n >>= 8;
 142         }
 143 }
 144
 145 uint64_t bytes_to_num(uint8_t* src, size_t len)
 146 {
 147         uint64_t num = 0;
 148         while (len--)
 149         {
 150                 num = (num << 8) | (*src);
 151                 src++;
 152         }
 153         return num;
 154 }
 155
 156 //assumes little endian
 157 char * printBits(size_t const size, void const * const ptr)
 158 {
 159     unsigned char *b = (unsigned char*) ptr;
 160     unsigned char byte;
 161         static char buf[1024];
 162         char * tmp = buf;
 163     int i, j;
 164
 165     for (i=size-1;i>=0;i--)
 166     {
 167         for (j=7;j>=0;j--)
 168         {
 169             byte = b[i] & (1<<j);
 170             byte >>= j;
 171             sprintf(tmp, "%u", byte);
 172                         tmp++;
 173         }
 174     }
 175         return buf;
 176 }
 177
 178 //  -------------------------------------------------------------------------
 179 //  string parameters lib
 180 //  -------------------------------------------------------------------------
 181
 182 //  -------------------------------------------------------------------------
 183 //  line     - param line
 184 //  bg, en   - symbol numbers in param line of beginning an ending parameter
 185 //  paramnum - param number (from 0)
 186 //  -------------------------------------------------------------------------
 187 int param_getptr(const char *line, int *bg, int *en, int paramnum)
 188 {
 189         int i;
 190         int len = strlen(line);
 191
 192         *bg = 0;
 193         *en = 0;
 194
 195   // skip spaces
 196         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
 197         if (*bg >= len) {
 198                 return 1;
 199         }
 200
 201         for (i = 0; i < paramnum; i++) {
 202                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
 203                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
 204
 205                 if (line[*bg] == '\0') return 1;
 206         }
 207
 208         *en = *bg;
 209         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
 210
 211         (*en)--;
 212
 213         return 0;
 214 }
 215
 216 char param_getchar(const char *line, int paramnum)
 217 {
 218         int bg, en;
 219
 220         if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 221
 222         return line[bg];
 223 }
 224
 225 uint8_t param_get8(const char *line, int paramnum)
 226 {
 227         return param_get8ex(line, paramnum, 10, 0);
 228 }
 229
 230 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 231 {
 232         int bg, en;
 233
 234         if (!param_getptr(line, &bg, &en, paramnum))
 235                 return strtoul(&line[bg], NULL, base) & 0xff;
 236         else
 237                 return deflt;
 238 }
 239
 240 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
 241 {
 242         int bg, en;
 243
 244         if (!param_getptr(line, &bg, &en, paramnum))
 245                 return strtoul(&line[bg], NULL, base);
 246         else
 247                 return deflt;
 248 }
 249
 250 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 251 {
 252         int bg, en;
 253
 254         if (!param_getptr(line, &bg, &en, paramnum))
 255                 return strtoull(&line[bg], NULL, base);
 256         else
 257                 return deflt;
 258
 259         return 0;
 260 }
 261
 262 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
 263 {
 264         int bg, en, temp, i;
 265
 266         if (hexcnt % 2)
 267                 return 1;
 268
 269         if (param_getptr(line, &bg, &en, paramnum)) return 1;
 270
 271         if (en - bg + 1 != hexcnt)
 272                 return 1;
 273
 274         for(i = 0; i < hexcnt; i += 2) {
 275                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;
 276
 277                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
 278                 data[i / 2] = temp & 0xff;
 279         }
 280
 281         return 0;
 282 }
 283
 284 int param_getstr(const char *line, int paramnum, char * str)
 285 {
 286         int bg, en;
 287
 288         if (param_getptr(line, &bg, &en, paramnum)) return 0;
 289
 290         memcpy(str, line + bg, en - bg + 1);
 291         str[en - bg + 1] = 0;
 292
 293         return en - bg + 1;
 294 }
 295
 296 /*
 297 The following methods comes from Rfidler sourcecode.
 298 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
 299 */
 300
 301 // convert hex to sequence of 0/1 bit values
 302 // returns number of bits converted
 303 int hextobinarray(char *target, char *source)
 304 {
 305     int length, i, count= 0;
 306     char x;
 307
 308     length = strlen(source);
 309     // process 4 bits (1 hex digit) at a time
 310     while(length--)
 311     {
 312         x= *(source++);
 313         // capitalize
 314         if (x >= 'a' && x <= 'f')
 315             x -= 32;
 316         // convert to numeric value
 317         if (x >= '0' && x <= '9')
 318             x -= '0';
 319         else if (x >= 'A' && x <= 'F')
 320             x -= 'A' - 10;
 321         else
 322             return 0;
 323         // output
 324         for(i= 0 ; i < 4 ; ++i, ++count)
 325             *(target++)= (x >> (3 - i)) & 1;
 326     }
 327
 328     return count;
 329 }
 330
 331 // convert hex to human readable binary string
 332 int hextobinstring(char *target, char *source)
 333 {
 334     int length;
 335
 336     if(!(length= hextobinarray(target, source)))
 337         return 0;
 338     binarraytobinstring(target, target, length);
 339     return length;
 340 }
 341
 342 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
 343 // return number of bits converted
 344 int binarraytohex(char *target, char *source, int length)
 345 {
 346     unsigned char i, x;
 347     int j = length;
 348
 349     if(j % 4)
 350         return 0;
 351
 352     while(j)
 353     {
 354         for(i= x= 0 ; i < 4 ; ++i)
 355             x +=  ( source[i] << (3 - i));
 356         sprintf(target,"%X", x);
 357         ++target;
 358         source += 4;
 359         j -= 4;
 360     }
 361     return length;
 362 }
 363
 364 // convert binary array to human readable binary
 365 void binarraytobinstring(char *target, char *source,  int length)
 366 {
 367     int i;
 368
 369     for(i= 0 ; i < length ; ++i)
 370         *(target++)= *(source++) + '0';
 371     *target= '\0';
 372 }
 373
 374 // return parity bit required to match type
 375 uint8_t GetParity( char *bits, uint8_t type, int length)
 376 {
 377     int x;
 378
 379     for(x= 0 ; length > 0 ; --length)
 380         x += bits[length - 1];
 381     x %= 2;
 382
 383     return x ^ type;
 384 }
 385
 386 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 387 void wiegand_add_parity(char *target, char *source, char length)
 388 {
 389     *(target++)= GetParity(source, EVEN, length / 2);
 390     memcpy(target, source, length);
 391     target += length;
 392     *(target)= GetParity(source + length / 2, ODD, length / 2);
 393 }