crewID/libfreefare
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Revert r565.

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r565 was misinterpreted as a bug while it's a feature.  Since it might be
inappropriate to do irreversible operations in an example, warn the user about
it.
This commit is contained in:
Romain Tartiere 2010-09-10 14:58:39 +00:00
parent 6ae77a29e1
commit 51269a92fa
1 changed files with 19 additions and 0 deletions
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19
examples/mifare-desfire-write-ndef.c
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@ -49,6 +49,9 @@ main(int argc, char *argv[])
nfc_device_t *device = NULL;
MifareTag *tags = NULL;
printf ("WARNING: This application turns Mifare DESFire targets into NFC Forum Type 4 Tags.\n");
printf ("THIS IS IRREVERSIBLE!\n");
if (argc > 1)
errx (EXIT_FAILURE, "usage: %s", argv[0]);
@ -108,6 +111,22 @@ main(int argc, char *argv[])
if (res < 0)
errx (EXIT_FAILURE, "Authentication with PICC master key failed");
uint8_t key_settings;
uint8_t max_keys;
mifare_desfire_get_key_settings(tags[i], &key_settings,&max_keys);
if ((key_settings & 0x08) == 0x08){
// Send Mifare DESFire ChangeKeySetting to change the PICC master key settings into :
// bit7-bit4 equal to 0000b
// bit3 equal to Xb, the configuration of the PICC master key MAY be changeable or frozen
// bit2 equal to 0b, CreateApplication and DeleteApplication commands are allowed with PICC master key authentication
// bit1 equal to 0b, GetApplicationIDs, and GetKeySettings are allowed with PICC master key authentication
// bit0 equal to Xb, PICC masterkey MAY be frozen or changeable
res = mifare_desfire_change_key_settings (tags[i],0x00);
if (res < 0)
errx (EXIT_FAILURE, "ChangeKeySettings failed");
}
// Mifare DESFire Create Application with AID equal to EEEE10h, key settings equal to 09, NumOfKeys equal to 01h
MifareDESFireAID aid = mifare_desfire_aid_new(0xEEEE10);
res = mifare_desfire_create_application (tags[i], aid, 0x09, 1);