client/src/atrs.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 // ATR information lookup
  17 //-----------------------------------------------------------------------------
  18 #include "atrs.h"
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include "commonutil.h" // ARRAYLEN
  22 #include "ui.h"         // PrintAndLogEx
  23
  24 // get a ATR description based on the atr bytes
  25 // returns description of the best match
  26 const char *getAtrInfo(const char *atr_str) {
  27     size_t slen = strlen(atr_str);
  28     int match = -1;
  29     // skip last element of AtrTable
  30     for (int i = 0; i < ARRAYLEN(AtrTable) - 1; ++i) {
  31
  32         if (strlen(AtrTable[i].bytes) != slen)
  33             continue;
  34
  35         if (strstr(AtrTable[i].bytes, ".") != NULL) {
  36             char *tmp_atr = calloc(slen, sizeof(uint8_t));
  37             if (tmp_atr == NULL) {
  38                 PrintAndLogEx(FAILED, "failed to allocate memory");
  39                 return NULL;
  40             }
  41
  42             for (int j = 0; j < slen; j++) {
  43                 tmp_atr[j] = (AtrTable[i].bytes[j] == '.') ? '.' : atr_str[j];
  44             }
  45
  46             if (strncmp(tmp_atr, AtrTable[i].bytes, slen) == 0) {
  47                 // record partial match but continue looking for full match
  48                 match = i;
  49             }
  50             free(tmp_atr);
  51
  52         } else {
  53             if (strncmp(atr_str, AtrTable[i].bytes, slen) == 0) {
  54                 return AtrTable[i].desc;
  55             }
  56         }
  57     }
  58
  59     if (match >= 0) {
  60         return AtrTable[match].desc;
  61     } else {
  62         //No match, return default = last element of AtrTable
  63         return AtrTable[ARRAYLEN(AtrTable) - 1].desc;
  64     }
  65 }