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Display old UID in mifare-desfire-ev1-configure-random-uid.

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If a presenter Mifare DESFire has a random UID, display it's original UID.
This commit is contained in:
Romain Tartiere 2010-09-30 06:03:31 +00:00
parent 717cd9fecd
commit 93f28ed83e
1 changed files with 45 additions and 3 deletions
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48
examples/mifare-desfire-ev1-configure-random-uid.c
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@ -77,7 +77,7 @@ main(int argc, char *argv[])
if (!device_count) if (!device_count)
errx (EXIT_FAILURE, "No NFC device found."); errx (EXIT_FAILURE, "No NFC device found.");
for (size_t d = 0; d < device_count; d++) { for (size_t d = 0; (!error) && (d < device_count); d++) {
device = nfc_connect (&(devices[d])); device = nfc_connect (&(devices[d]));
if (!device) { if (!device) {
warnx ("nfc_connect() failed."); warnx ("nfc_connect() failed.");
@ -100,6 +100,11 @@ main(int argc, char *argv[])
printf ("Found %s with UID %s. ", freefare_get_tag_friendly_name (tags[i]), tag_uid); printf ("Found %s with UID %s. ", freefare_get_tag_friendly_name (tags[i]), tag_uid);
bool do_it = true; bool do_it = true;
int res;
size_t tag_uid_len = strlen (tag_uid) / 2;
switch (tag_uid_len) {
case 7: // Regular UID
if (configure_options.interactive) { if (configure_options.interactive) {
printf ("Configure random UID (this cannot be undone) [yN] "); printf ("Configure random UID (this cannot be undone) [yN] ");
fgets (buffer, BUFSIZ, stdin); fgets (buffer, BUFSIZ, stdin);
@ -109,8 +114,6 @@ main(int argc, char *argv[])
} }
if (do_it) { if (do_it) {
int res;
MifareDESFireKey default_key = mifare_desfire_des_key_new_with_version (null_key_data);
res = mifare_desfire_connect (tags[i]); res = mifare_desfire_connect (tags[i]);
if (res < 0) { if (res < 0) {
@ -119,12 +122,14 @@ main(int argc, char *argv[])
break; break;
} }
MifareDESFireKey default_key = mifare_desfire_des_key_new_with_version (null_key_data);
res = mifare_desfire_authenticate (tags[i], 0, default_key); res = mifare_desfire_authenticate (tags[i], 0, default_key);
if (res < 0) { if (res < 0) {
freefare_perror (tags[i], "mifare_desfire_authenticate"); freefare_perror (tags[i], "mifare_desfire_authenticate");
error = EXIT_FAILURE; error = EXIT_FAILURE;
break; break;
} }
mifare_desfire_key_free (default_key);
res = mifare_desfire_set_configuration (tags[i], false, true); res = mifare_desfire_set_configuration (tags[i], false, true);
if (res < 0) { if (res < 0) {
@ -135,6 +140,43 @@ main(int argc, char *argv[])
mifare_desfire_disconnect (tags[i]); mifare_desfire_disconnect (tags[i]);
} }
break;
case 4: // Random UID
res = mifare_desfire_connect (tags[i]);
if (res < 0) {
warnx ("Can't connect to Mifare DESFire target.");
error = EXIT_FAILURE;
break;
}
MifareDESFireKey default_key = mifare_desfire_des_key_new_with_version (null_key_data);
res = mifare_desfire_authenticate (tags[i], 0, default_key);
if (res < 0) {
freefare_perror (tags[i], "mifare_desfire_authenticate");
error = EXIT_FAILURE;
break;
}
mifare_desfire_key_free (default_key);
char *old_tag_uid;
res = mifare_desfire_get_card_uid (tags[i], &old_tag_uid);
if (res < 0) {
freefare_perror (tags[i], "mifare_desfire_get_card_uid");
error = EXIT_FAILURE;
break;
}
printf ("Old card UID: %s\n", old_tag_uid);
free (old_tag_uid);
mifare_desfire_disconnect (tags[i]);
break;
default: // Should not happen
warnx ("Unsupported UID length %d.", tag_uid_len);
error = EXIT_FAILURE;
break;
}
free (tag_uid); free (tag_uid);
} }