common/iso15693tools.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // See LICENSE.txt for the text of the license.
  15 //-----------------------------------------------------------------------------
  16 // ISO15693 other commons
  17 //-----------------------------------------------------------------------------
  18 #include "iso15693tools.h"
  19 #include <stdio.h>
  20
  21 #define ISO15693_SPRINTUID_BUFLEN (3 * 8 + 1)
  22
  23 // returns a string representation of the UID
  24 // UID is transmitted and stored LSB first, displayed MSB first
  25 // dest    char* buffer, where to put the UID, if NULL a static buffer is returned
  26 // uid[]     the UID in transmission order
  27 // return: ptr to string
  28 char *iso15693_sprintUID(char *dest, uint8_t *uid) {
  29     static char tmp[ISO15693_SPRINTUID_BUFLEN] = {0};
  30     if (dest == NULL) {
  31         dest = tmp;
  32     }
  33
  34     if (uid) {
  35 #ifdef HAVE_SNPRINTF
  36         snprintf(dest, ISO15693_SPRINTUID_BUFLEN,
  37 #else
  38         sprintf(dest,
  39 #endif
  40                  "%02X %02X %02X %02X %02X %02X %02X %02X",
  41                  uid[7], uid[6], uid[5], uid[4],
  42                  uid[3], uid[2], uid[1], uid[0]
  43                 );
  44     }
  45     return dest;
  46 }