libcacard/vcardt.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <glib.h>
   4
   5 #include "libcacard/vcardt.h"
   6
   7 #include "libcacard/vcardt_internal.h"
   8
   9 /* create an ATR with appropriate historical bytes */
  10 #define ATR_TS_DIRECT_CONVENTION 0x3b
  11 #define ATR_TA_PRESENT 0x10
  12 #define ATR_TB_PRESENT 0x20
  13 #define ATR_TC_PRESENT 0x40
  14 #define ATR_TD_PRESENT 0x80
  15
  16 unsigned char *vcard_alloc_atr(const char *postfix, int *atr_len)
  17 {
  18     int postfix_len;
  19     const char prefix[] = "VCARD_";
  20     const char default_postfix[] = "DEFAULT";
  21     const int prefix_len = sizeof(prefix) - 1;
  22     int total_len;
  23     unsigned char *atr;
  24
  25     if (postfix == NULL) {
  26         postfix = default_postfix;
  27     }
  28     postfix_len = strlen(postfix);
  29     total_len = 3 + prefix_len + postfix_len;
  30     atr = g_malloc(total_len);
  31     atr[0] = ATR_TS_DIRECT_CONVENTION;
  32     atr[1] = ATR_TD_PRESENT + prefix_len + postfix_len;
  33     atr[2] = 0x00;
  34     memcpy(&atr[3], prefix, prefix_len);
  35     memcpy(&atr[3 + prefix_len], postfix, postfix_len);
  36     if (atr_len) {
  37         *atr_len = total_len;
  38     }
  39     return atr;
  40 }