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nfc-mfclassic: detect 2K MFP via RATS

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This commit is contained in:
Philippe Teuwen 2013-03-12 13:35:31 +01:00
parent d019f9729d
commit 16161e1a68
1 changed files with 37 additions and 2 deletions
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39
utils/nfc-mfclassic.c
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@ -261,6 +261,32 @@ unlock_card(void)
return true;
}
static int
get_rats(void)
{
int res;
uint8_t abtRats[2] = { 0xe0, 0x50};
// Use raw send/receive methods
if (nfc_device_set_property_bool(pnd, NP_EASY_FRAMING, false) < 0) {
nfc_perror(pnd, "nfc_configure");
return -1;
}
res = nfc_initiator_transceive_bytes(pnd, abtRats, sizeof(abtRats), abtRx, sizeof(abtRx), 0);
if (res > 0) {
// ISO14443-4 card, turn RF field off/on to access ISO14443-3 again
nfc_device_set_property_bool(pnd, NP_ACTIVATE_FIELD, false);
nfc_device_set_property_bool(pnd, NP_ACTIVATE_FIELD, true);
}
// Reselect tag
if (nfc_initiator_select_passive_target(pnd, nmMifare, NULL, 0, &nt) <= 0) {
printf("Error: tag disappeared\n");
nfc_close(pnd);
nfc_exit(context);
exit(EXIT_FAILURE);
}
return res;
}
static bool
read_card(int read_unlocked)
{
@ -558,9 +584,18 @@ main(int argc, const char *argv[])
// 320b
uiBlocks = 0x13;
else
// 1K
// TODO: for MFP it is 0x7f (2K) but how to be sure it's a MFP? Try to get RATS?
// 1K/2K, checked through RATS
uiBlocks = 0x3f;
// Testing RATS
int res;
if ((res = get_rats()) > 0) {
if ((res >= 10) && (abtRx[5] == 0xc1) && (abtRx[6] == 0x05)
&& (abtRx[7] == 0x2f) && (abtRx[8] == 0x2f)
&& ((nt.nti.nai.abtAtqa[1] & 0x02) == 0x00)) {
// MIFARE Plus 2K
uiBlocks = 0x7f;
}
}
printf("Guessing size: seems to be a %i-byte card\n", (uiBlocks + 1) * 16);
if (bUseKeyFile) {