NFC: fix creating MF Classic tags from "Add Manually" menu (BCC calulation and ATQA/SAK writing) (#2342)
* NFC: fix creating MF Classic cards from "Add Manually" menu (BCC calculation and AQTA/SAK writing) * NFC: Fix BCC/SAK/ATQA in unit_tests and SAK in nfc_generate_mf_classic Co-authored-by: gornekich <n.gorbadey@gmail.com>
This commit is contained in:
parent
01a9854f8a
commit
46fb86265c
@ -348,13 +348,37 @@ static void mf_classic_generator_test(uint8_t uid_len, MfClassicType type) {
|
||||
memcpy(atqa, nfc_dev->dev_data.nfc_data.atqa, 2);
|
||||
|
||||
MfClassicData* mf_data = &nfc_dev->dev_data.mf_classic_data;
|
||||
// Check the manufacturer block (should be uid[uid_len] + 0xFF[rest])
|
||||
// Check the manufacturer block (should be uid[uid_len] + BCC (for 4byte only) + SAK + ATQA0 + ATQA1 + 0xFF[rest])
|
||||
uint8_t manufacturer_block[16] = {0};
|
||||
memcpy(manufacturer_block, nfc_dev->dev_data.mf_classic_data.block[0].value, 16);
|
||||
mu_assert(
|
||||
memcmp(manufacturer_block, uid, uid_len) == 0,
|
||||
"manufacturer_block uid doesn't match the file\r\n");
|
||||
for(uint8_t i = uid_len; i < 16; i++) {
|
||||
|
||||
uint8_t position = 0;
|
||||
if(uid_len == 4) {
|
||||
position = uid_len;
|
||||
|
||||
uint8_t bcc = 0;
|
||||
|
||||
for(int i = 0; i < uid_len; i++) {
|
||||
bcc ^= uid[i];
|
||||
}
|
||||
|
||||
mu_assert(manufacturer_block[position] == bcc, "manufacturer_block bcc assert failed\r\n");
|
||||
} else {
|
||||
position = uid_len - 1;
|
||||
}
|
||||
|
||||
mu_assert(manufacturer_block[position + 1] == sak, "manufacturer_block sak assert failed\r\n");
|
||||
|
||||
mu_assert(
|
||||
manufacturer_block[position + 2] == atqa[0], "manufacturer_block atqa0 assert failed\r\n");
|
||||
|
||||
mu_assert(
|
||||
manufacturer_block[position + 3] == atqa[1], "manufacturer_block atqa1 assert failed\r\n");
|
||||
|
||||
for(uint8_t i = position + 4; i < 16; i++) {
|
||||
mu_assert(
|
||||
manufacturer_block[i] == 0xFF, "manufacturer_block[i] == 0xFF assert failed\r\n");
|
||||
}
|
||||
|
@ -30,12 +30,32 @@ static void nfc_generate_mf_classic_uid(uint8_t* uid, uint8_t length) {
|
||||
furi_hal_random_fill_buf(&uid[1], length - 1);
|
||||
}
|
||||
|
||||
static void nfc_generate_mf_classic_block_0(uint8_t* block, uint8_t uid_len) {
|
||||
static void nfc_generate_mf_classic_block_0(
|
||||
uint8_t* block,
|
||||
uint8_t uid_len,
|
||||
uint8_t sak,
|
||||
uint8_t atqa0,
|
||||
uint8_t atqa1) {
|
||||
// Block length is always 16 bytes, and the UID can be either 4 or 7 bytes
|
||||
furi_assert(uid_len == 4 || uid_len == 7);
|
||||
furi_assert(block);
|
||||
nfc_generate_mf_classic_uid(block, uid_len);
|
||||
for(int i = uid_len; i < 16; i++) {
|
||||
|
||||
if(uid_len == 4) {
|
||||
// Calculate BCC
|
||||
block[uid_len] = 0;
|
||||
|
||||
for(int i = 0; i < uid_len; i++) {
|
||||
block[uid_len] ^= block[i];
|
||||
}
|
||||
} else {
|
||||
uid_len -= 1;
|
||||
}
|
||||
|
||||
block[uid_len + 1] = sak;
|
||||
block[uid_len + 2] = atqa0;
|
||||
block[uid_len + 3] = atqa1;
|
||||
|
||||
for(int i = uid_len + 4; i < 16; i++) {
|
||||
block[i] = 0xFF;
|
||||
}
|
||||
}
|
||||
@ -74,7 +94,6 @@ static void
|
||||
data->nfc_data.type = FuriHalNfcTypeA;
|
||||
data->nfc_data.interface = FuriHalNfcInterfaceRf;
|
||||
data->nfc_data.uid_len = uid_len;
|
||||
nfc_generate_mf_classic_block_0(data->mf_classic_data.block[0].value, uid_len);
|
||||
data->nfc_data.atqa[0] = 0x44;
|
||||
data->nfc_data.atqa[1] = 0x00;
|
||||
data->nfc_data.sak = 0x08;
|
||||
@ -316,6 +335,7 @@ static void nfc_generate_ntag_i2c_plus_2k(NfcDeviceData* data) {
|
||||
|
||||
void nfc_generate_mf_classic(NfcDeviceData* data, uint8_t uid_len, MfClassicType type) {
|
||||
nfc_generate_common_start(data);
|
||||
nfc_generate_mf_classic_uid(data->mf_classic_data.block[0].value, uid_len);
|
||||
nfc_generate_mf_classic_common(data, uid_len, type);
|
||||
|
||||
// Set the UID
|
||||
@ -339,7 +359,6 @@ void nfc_generate_mf_classic(NfcDeviceData* data, uint8_t uid_len, MfClassicType
|
||||
}
|
||||
// Set SAK to 18
|
||||
data->nfc_data.sak = 0x18;
|
||||
|
||||
} else if(type == MfClassicType1k) {
|
||||
// Set every block to 0xFF
|
||||
for(uint16_t i = 1; i < MF_CLASSIC_1K_TOTAL_SECTORS_NUM * 4; i += 1) {
|
||||
@ -366,6 +385,13 @@ void nfc_generate_mf_classic(NfcDeviceData* data, uint8_t uid_len, MfClassicType
|
||||
data->nfc_data.sak = 0x09;
|
||||
}
|
||||
|
||||
nfc_generate_mf_classic_block_0(
|
||||
data->mf_classic_data.block[0].value,
|
||||
uid_len,
|
||||
data->nfc_data.sak,
|
||||
data->nfc_data.atqa[0],
|
||||
data->nfc_data.atqa[1]);
|
||||
|
||||
mfc->type = type;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user