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unleashed-firmware/lib/nfc/nfc_worker.c
Astra 6dde5586af
[FL-2803] Mifare Classic read improvements Part 1 (#1822) 
* Reuse found keys when reading a card
* Fix keys not being read if no newline at the end of the file
* Actually read all keys from the dictionary
* Support for furi_string
* Check only for re-used key after the current sector
* Declare the key attack function as static
* nfc: change logs, check worker state

Co-authored-by: gornekich <n.gorbadey@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>
2022-10-07 02:07:56 +09:00

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#include "nfc_worker_i.h"
#include <furi_hal.h>
#include <platform.h>
#include "parsers/nfc_supported_card.h"
#define TAG "NfcWorker"
/***************************** NFC Worker API *******************************/
NfcWorker* nfc_worker_alloc() {
NfcWorker* nfc_worker = malloc(sizeof(NfcWorker));
// Worker thread attributes
nfc_worker->thread = furi_thread_alloc();
furi_thread_set_name(nfc_worker->thread, "NfcWorker");
furi_thread_set_stack_size(nfc_worker->thread, 8192);
furi_thread_set_callback(nfc_worker->thread, nfc_worker_task);
furi_thread_set_context(nfc_worker->thread, nfc_worker);
nfc_worker->callback = NULL;
nfc_worker->context = NULL;
nfc_worker->storage = furi_record_open(RECORD_STORAGE);
// Initialize rfal
while(furi_hal_nfc_is_busy()) {
furi_delay_ms(10);
}
nfc_worker_change_state(nfc_worker, NfcWorkerStateReady);
nfc_worker->reader_analyzer = reader_analyzer_alloc(nfc_worker->storage);
return nfc_worker;
}
void nfc_worker_free(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
furi_thread_free(nfc_worker->thread);
furi_record_close(RECORD_STORAGE);
reader_analyzer_free(nfc_worker->reader_analyzer);
free(nfc_worker);
}
NfcWorkerState nfc_worker_get_state(NfcWorker* nfc_worker) {
return nfc_worker->state;
}
void nfc_worker_start(
NfcWorker* nfc_worker,
NfcWorkerState state,
NfcDeviceData* dev_data,
NfcWorkerCallback callback,
void* context) {
furi_assert(nfc_worker);
furi_assert(dev_data);
while(furi_hal_nfc_is_busy()) {
furi_delay_ms(10);
}
nfc_worker->callback = callback;
nfc_worker->context = context;
nfc_worker->dev_data = dev_data;
nfc_worker_change_state(nfc_worker, state);
furi_thread_start(nfc_worker->thread);
}
void nfc_worker_stop(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
if(nfc_worker->state == NfcWorkerStateBroken || nfc_worker->state == NfcWorkerStateReady) {
return;
}
furi_hal_nfc_stop();
nfc_worker_change_state(nfc_worker, NfcWorkerStateStop);
furi_thread_join(nfc_worker->thread);
}
void nfc_worker_change_state(NfcWorker* nfc_worker, NfcWorkerState state) {
nfc_worker->state = state;
}
/***************************** NFC Worker Thread *******************************/
int32_t nfc_worker_task(void* context) {
NfcWorker* nfc_worker = context;
furi_hal_nfc_exit_sleep();
if(nfc_worker->state == NfcWorkerStateRead) {
nfc_worker_read(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateUidEmulate) {
nfc_worker_emulate_uid(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateEmulateApdu) {
nfc_worker_emulate_apdu(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateMfUltralightEmulate) {
nfc_worker_emulate_mf_ultralight(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateMfClassicEmulate) {
nfc_worker_emulate_mf_classic(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateReadMfUltralightReadAuth) {
nfc_worker_mf_ultralight_read_auth(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateMfClassicDictAttack) {
nfc_worker_mf_classic_dict_attack(nfc_worker);
} else if(nfc_worker->state == NfcWorkerStateAnalyzeReader) {
nfc_worker_analyze_reader(nfc_worker);
}
furi_hal_nfc_sleep();
nfc_worker_change_state(nfc_worker, NfcWorkerStateReady);
return 0;
}
static bool nfc_worker_read_mf_ultralight(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
bool read_success = false;
MfUltralightReader reader = {};
MfUltralightData data = {};
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, tx_rx, false);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
do {
// Try to read supported card
FURI_LOG_I(TAG, "Trying to read a supported card ...");
for(size_t i = 0; i < NfcSupportedCardTypeEnd; i++) {
if(nfc_supported_card[i].protocol == NfcDeviceProtocolMifareUl) {
if(nfc_supported_card[i].verify(nfc_worker, tx_rx)) {
if(nfc_supported_card[i].read(nfc_worker, tx_rx)) {
read_success = true;
nfc_supported_card[i].parse(nfc_worker->dev_data);
break;
}
} else {
furi_hal_nfc_sleep();
}
}
}
if(read_success) break;
furi_hal_nfc_sleep();
// Otherwise, try to read as usual
if(!furi_hal_nfc_detect(&nfc_worker->dev_data->nfc_data, 200)) break;
if(!mf_ul_read_card(tx_rx, &reader, &data)) break;
// Copy data
nfc_worker->dev_data->mf_ul_data = data;
read_success = true;
} while(false);
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
return read_success;
}
static bool nfc_worker_read_mf_classic(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
furi_assert(nfc_worker->callback);
bool read_success = false;
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, tx_rx, false);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
do {
// Try to read supported card
FURI_LOG_I(TAG, "Trying to read a supported card ...");
for(size_t i = 0; i < NfcSupportedCardTypeEnd; i++) {
if(nfc_supported_card[i].protocol == NfcDeviceProtocolMifareClassic) {
if(nfc_supported_card[i].verify(nfc_worker, tx_rx)) {
if(nfc_supported_card[i].read(nfc_worker, tx_rx)) {
read_success = true;
nfc_supported_card[i].parse(nfc_worker->dev_data);
break;
}
} else {
furi_hal_nfc_sleep();
}
}
}
if(read_success) break;
// Try to read card with key cache
FURI_LOG_I(TAG, "Search for key cache ...");
if(nfc_worker->callback(NfcWorkerEventReadMfClassicLoadKeyCache, nfc_worker->context)) {
FURI_LOG_I(TAG, "Load keys cache success. Start reading");
uint8_t sectors_read =
mf_classic_update_card(tx_rx, &nfc_worker->dev_data->mf_classic_data);
uint8_t sectors_total =
mf_classic_get_total_sectors_num(nfc_worker->dev_data->mf_classic_data.type);
FURI_LOG_I(TAG, "Read %d sectors out of %d total", sectors_read, sectors_total);
read_success = (sectors_read == sectors_total);
}
} while(false);
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
return read_success;
}
static bool nfc_worker_read_mf_desfire(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
bool read_success = false;
MifareDesfireData* data = &nfc_worker->dev_data->mf_df_data;
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, tx_rx, false);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
do {
if(!furi_hal_nfc_detect(&nfc_worker->dev_data->nfc_data, 300)) break;
if(!mf_df_read_card(tx_rx, data)) break;
read_success = true;
} while(false);
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
return read_success;
}
static bool nfc_worker_read_bank_card(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
bool read_success = false;
EmvApplication emv_app = {};
EmvData* result = &nfc_worker->dev_data->emv_data;
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, tx_rx, false);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
do {
// Read card
if(!furi_hal_nfc_detect(&nfc_worker->dev_data->nfc_data, 300)) break;
if(!emv_read_bank_card(tx_rx, &emv_app)) break;
// Copy data
// TODO Set EmvData to reader or like in mifare ultralight!
result->number_len = emv_app.card_number_len;
memcpy(result->number, emv_app.card_number, result->number_len);
result->aid_len = emv_app.aid_len;
memcpy(result->aid, emv_app.aid, result->aid_len);
if(emv_app.name_found) {
memcpy(result->name, emv_app.name, sizeof(emv_app.name));
}
if(emv_app.exp_month) {
result->exp_mon = emv_app.exp_month;
result->exp_year = emv_app.exp_year;
}
if(emv_app.country_code) {
result->country_code = emv_app.country_code;
}
if(emv_app.currency_code) {
result->currency_code = emv_app.currency_code;
}
read_success = true;
} while(false);
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
return read_success;
}
static bool nfc_worker_read_nfca(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
bool card_read = false;
furi_hal_nfc_sleep();
if(mf_ul_check_card_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak)) {
FURI_LOG_I(TAG, "Mifare Ultralight / NTAG detected");
nfc_worker->dev_data->protocol = NfcDeviceProtocolMifareUl;
card_read = nfc_worker_read_mf_ultralight(nfc_worker, tx_rx);
} else if(mf_classic_check_card_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak)) {
FURI_LOG_I(TAG, "Mifare Classic detected");
nfc_worker->dev_data->protocol = NfcDeviceProtocolMifareClassic;
nfc_worker->dev_data->mf_classic_data.type =
mf_classic_get_classic_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak);
card_read = nfc_worker_read_mf_classic(nfc_worker, tx_rx);
} else if(mf_df_check_card_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak)) {
FURI_LOG_I(TAG, "Mifare DESFire detected");
nfc_worker->dev_data->protocol = NfcDeviceProtocolMifareDesfire;
if(!nfc_worker_read_mf_desfire(nfc_worker, tx_rx)) {
FURI_LOG_I(TAG, "Unknown card. Save UID");
nfc_worker->dev_data->protocol = NfcDeviceProtocolUnknown;
}
card_read = true;
} else if(nfc_data->interface == FuriHalNfcInterfaceIsoDep) {
FURI_LOG_I(TAG, "ISO14443-4 card detected");
nfc_worker->dev_data->protocol = NfcDeviceProtocolEMV;
if(!nfc_worker_read_bank_card(nfc_worker, tx_rx)) {
FURI_LOG_I(TAG, "Unknown card. Save UID");
nfc_worker->dev_data->protocol = NfcDeviceProtocolUnknown;
}
card_read = true;
} else {
nfc_worker->dev_data->protocol = NfcDeviceProtocolUnknown;
card_read = true;
}
return card_read;
}
void nfc_worker_read(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
furi_assert(nfc_worker->callback);
nfc_device_data_clear(nfc_worker->dev_data);
NfcDeviceData* dev_data = nfc_worker->dev_data;
FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
FuriHalNfcTxRxContext tx_rx = {};
NfcWorkerEvent event = 0;
bool card_not_detected_notified = false;
while(nfc_worker->state == NfcWorkerStateRead) {
if(furi_hal_nfc_detect(nfc_data, 300)) {
// Process first found device
nfc_worker->callback(NfcWorkerEventCardDetected, nfc_worker->context);
card_not_detected_notified = false;
if(nfc_data->type == FuriHalNfcTypeA) {
if(nfc_worker_read_nfca(nfc_worker, &tx_rx)) {
if(dev_data->protocol == NfcDeviceProtocolMifareUl) {
event = NfcWorkerEventReadMfUltralight;
break;
} else if(dev_data->protocol == NfcDeviceProtocolMifareClassic) {
event = NfcWorkerEventReadMfClassicDone;
break;
} else if(dev_data->protocol == NfcDeviceProtocolMifareDesfire) {
event = NfcWorkerEventReadMfDesfire;
break;
} else if(dev_data->protocol == NfcDeviceProtocolEMV) {
event = NfcWorkerEventReadBankCard;
break;
} else if(dev_data->protocol == NfcDeviceProtocolUnknown) {
event = NfcWorkerEventReadUidNfcA;
break;
}
} else {
if(dev_data->protocol == NfcDeviceProtocolMifareClassic) {
event = NfcWorkerEventReadMfClassicDictAttackRequired;
break;
}
}
} else if(nfc_data->type == FuriHalNfcTypeB) {
event = NfcWorkerEventReadUidNfcB;
break;
} else if(nfc_data->type == FuriHalNfcTypeF) {
event = NfcWorkerEventReadUidNfcF;
break;
} else if(nfc_data->type == FuriHalNfcTypeV) {
event = NfcWorkerEventReadUidNfcV;
break;
}
} else {
if(!card_not_detected_notified) {
nfc_worker->callback(NfcWorkerEventNoCardDetected, nfc_worker->context);
card_not_detected_notified = true;
}
}
furi_hal_nfc_sleep();
furi_delay_ms(100);
}
// Notify caller and exit
if(event > NfcWorkerEventReserved) {
nfc_worker->callback(event, nfc_worker->context);
}
}
void nfc_worker_emulate_uid(NfcWorker* nfc_worker) {
FuriHalNfcTxRxContext tx_rx = {};
FuriHalNfcDevData* data = &nfc_worker->dev_data->nfc_data;
NfcReaderRequestData* reader_data = &nfc_worker->dev_data->reader_data;
// TODO add support for RATS
// Need to save ATS to support ISO-14443A-4 emulation
while(nfc_worker->state == NfcWorkerStateUidEmulate) {
if(furi_hal_nfc_listen(data->uid, data->uid_len, data->atqa, data->sak, false, 100)) {
if(furi_hal_nfc_tx_rx(&tx_rx, 100)) {
reader_data->size = tx_rx.rx_bits / 8;
if(reader_data->size > 0) {
memcpy(reader_data->data, tx_rx.rx_data, reader_data->size);
if(nfc_worker->callback) {
nfc_worker->callback(NfcWorkerEventSuccess, nfc_worker->context);
}
}
} else {
FURI_LOG_E(TAG, "Failed to get reader commands");
}
}
}
}
void nfc_worker_emulate_apdu(NfcWorker* nfc_worker) {
FuriHalNfcTxRxContext tx_rx = {};
FuriHalNfcDevData params = {
.uid = {0xCF, 0x72, 0xd4, 0x40},
.uid_len = 4,
.atqa = {0x00, 0x04},
.sak = 0x20,
.type = FuriHalNfcTypeA,
};
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, &tx_rx, true);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
while(nfc_worker->state == NfcWorkerStateEmulateApdu) {
if(furi_hal_nfc_listen(params.uid, params.uid_len, params.atqa, params.sak, false, 300)) {
FURI_LOG_D(TAG, "POS terminal detected");
if(emv_card_emulation(&tx_rx)) {
FURI_LOG_D(TAG, "EMV card emulated");
}
} else {
FURI_LOG_D(TAG, "Can't find reader");
}
furi_hal_nfc_sleep();
furi_delay_ms(20);
}
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
}
void nfc_worker_emulate_mf_ultralight(NfcWorker* nfc_worker) {
FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
MfUltralightEmulator emulator = {};
mf_ul_prepare_emulation(&emulator, &nfc_worker->dev_data->mf_ul_data);
while(nfc_worker->state == NfcWorkerStateMfUltralightEmulate) {
mf_ul_reset_emulation(&emulator, true);
furi_hal_nfc_emulate_nfca(
nfc_data->uid,
nfc_data->uid_len,
nfc_data->atqa,
nfc_data->sak,
mf_ul_prepare_emulation_response,
&emulator,
5000);
// Check if data was modified
if(emulator.data_changed) {
nfc_worker->dev_data->mf_ul_data = emulator.data;
if(nfc_worker->callback) {
nfc_worker->callback(NfcWorkerEventSuccess, nfc_worker->context);
}
emulator.data_changed = false;
}
}
}
static void nfc_worker_mf_classic_key_attack(
NfcWorker* nfc_worker,
uint64_t key,
FuriHalNfcTxRxContext* tx_rx,
uint16_t start_sector) {
furi_assert(nfc_worker);
MfClassicData* data = &nfc_worker->dev_data->mf_classic_data;
uint32_t total_sectors = mf_classic_get_total_sectors_num(data->type);
furi_assert(start_sector < total_sectors);
// Check every sector's A and B keys with the given key
for(size_t i = start_sector; i < total_sectors; i++) {
uint8_t block_num = mf_classic_get_sector_trailer_block_num_by_sector(i);
if(mf_classic_is_sector_read(data, i)) continue;
if(!mf_classic_is_key_found(data, i, MfClassicKeyA)) {
FURI_LOG_D(
TAG,
"Trying A key for sector %d, key: %04lx%08lx",
i,
(uint32_t)(key >> 32),
(uint32_t)key);
if(mf_classic_authenticate(tx_rx, block_num, key, MfClassicKeyA)) {
mf_classic_set_key_found(data, i, MfClassicKeyA, key);
FURI_LOG_D(TAG, "Key found");
nfc_worker->callback(NfcWorkerEventFoundKeyA, nfc_worker->context);
}
}
if(!mf_classic_is_key_found(data, i, MfClassicKeyB)) {
FURI_LOG_D(
TAG,
"Trying B key for sector %d, key: %04lx%08lx",
i,
(uint32_t)(key >> 32),
(uint32_t)key);
if(mf_classic_authenticate(tx_rx, block_num, key, MfClassicKeyB)) {
mf_classic_set_key_found(data, i, MfClassicKeyB, key);
FURI_LOG_D(TAG, "Key found");
nfc_worker->callback(NfcWorkerEventFoundKeyB, nfc_worker->context);
}
}
if(mf_classic_is_sector_read(data, i)) continue;
mf_classic_read_sector(tx_rx, data, i);
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;
}
}
void nfc_worker_mf_classic_dict_attack(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
furi_assert(nfc_worker->callback);
MfClassicData* data = &nfc_worker->dev_data->mf_classic_data;
NfcMfClassicDictAttackData* dict_attack_data =
&nfc_worker->dev_data->mf_classic_dict_attack_data;
uint32_t total_sectors = mf_classic_get_total_sectors_num(data->type);
uint64_t key = 0;
FuriHalNfcTxRxContext tx_rx = {};
bool card_found_notified = true;
bool card_removed_notified = false;
// Load dictionary
MfClassicDict* dict = dict_attack_data->dict;
if(!dict) {
FURI_LOG_E(TAG, "Dictionary not found");
nfc_worker->callback(NfcWorkerEventNoDictFound, nfc_worker->context);
return;
}
FURI_LOG_D(TAG, "Start Dictionary attack, Key Count %d", mf_classic_dict_get_total_keys(dict));
for(size_t i = 0; i < total_sectors; i++) {
FURI_LOG_I(TAG, "Sector %d", i);
nfc_worker->callback(NfcWorkerEventNewSector, nfc_worker->context);
uint8_t block_num = mf_classic_get_sector_trailer_block_num_by_sector(i);
if(mf_classic_is_sector_read(data, i)) continue;
bool is_key_a_found = mf_classic_is_key_found(data, i, MfClassicKeyA);
bool is_key_b_found = mf_classic_is_key_found(data, i, MfClassicKeyB);
uint16_t key_index = 0;
while(mf_classic_dict_get_next_key(dict, &key)) {
FURI_LOG_T(TAG, "Key %d", key_index);
if(++key_index % NFC_DICT_KEY_BATCH_SIZE == 0) {
nfc_worker->callback(NfcWorkerEventNewDictKeyBatch, nfc_worker->context);
}
furi_hal_nfc_sleep();
if(furi_hal_nfc_activate_nfca(200, NULL)) {
furi_hal_nfc_sleep();
if(!card_found_notified) {
nfc_worker->callback(NfcWorkerEventCardDetected, nfc_worker->context);
card_found_notified = true;
card_removed_notified = false;
}
FURI_LOG_D(
TAG,
"Try to auth to sector %d with key %04lx%08lx",
i,
(uint32_t)(key >> 32),
(uint32_t)key);
if(!is_key_a_found) {
is_key_a_found = mf_classic_is_key_found(data, i, MfClassicKeyA);
if(mf_classic_authenticate(&tx_rx, block_num, key, MfClassicKeyA)) {
mf_classic_set_key_found(data, i, MfClassicKeyA, key);
FURI_LOG_D(TAG, "Key found");
nfc_worker->callback(NfcWorkerEventFoundKeyA, nfc_worker->context);
nfc_worker_mf_classic_key_attack(nfc_worker, key, &tx_rx, i + 1);
}
furi_hal_nfc_sleep();
}
if(!is_key_b_found) {
is_key_b_found = mf_classic_is_key_found(data, i, MfClassicKeyB);
if(mf_classic_authenticate(&tx_rx, block_num, key, MfClassicKeyB)) {
FURI_LOG_D(TAG, "Key found");
mf_classic_set_key_found(data, i, MfClassicKeyB, key);
nfc_worker->callback(NfcWorkerEventFoundKeyB, nfc_worker->context);
nfc_worker_mf_classic_key_attack(nfc_worker, key, &tx_rx, i + 1);
}
}
if(is_key_a_found && is_key_b_found) break;
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;
} else {
if(!card_removed_notified) {
nfc_worker->callback(NfcWorkerEventNoCardDetected, nfc_worker->context);
card_removed_notified = true;
card_found_notified = false;
}
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;
}
}
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;
mf_classic_read_sector(&tx_rx, data, i);
mf_classic_dict_rewind(dict);
}
if(nfc_worker->state == NfcWorkerStateMfClassicDictAttack) {
nfc_worker->callback(NfcWorkerEventSuccess, nfc_worker->context);
} else {
nfc_worker->callback(NfcWorkerEventAborted, nfc_worker->context);
}
}
void nfc_worker_emulate_mf_classic(NfcWorker* nfc_worker) {
FuriHalNfcTxRxContext tx_rx = {};
FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
MfClassicEmulator emulator = {
.cuid = nfc_util_bytes2num(&nfc_data->uid[nfc_data->uid_len - 4], 4),
.data = nfc_worker->dev_data->mf_classic_data,
.data_changed = false,
};
NfcaSignal* nfca_signal = nfca_signal_alloc();
tx_rx.nfca_signal = nfca_signal;
rfal_platform_spi_acquire();
furi_hal_nfc_listen_start(nfc_data);
while(nfc_worker->state == NfcWorkerStateMfClassicEmulate) {
if(furi_hal_nfc_listen_rx(&tx_rx, 300)) {
mf_classic_emulator(&emulator, &tx_rx);
}
}
if(emulator.data_changed) {
nfc_worker->dev_data->mf_classic_data = emulator.data;
if(nfc_worker->callback) {
nfc_worker->callback(NfcWorkerEventSuccess, nfc_worker->context);
}
emulator.data_changed = false;
}
nfca_signal_free(nfca_signal);
rfal_platform_spi_release();
}
void nfc_worker_mf_ultralight_read_auth(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
furi_assert(nfc_worker->callback);
MfUltralightData* data = &nfc_worker->dev_data->mf_ul_data;
FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
FuriHalNfcTxRxContext tx_rx = {};
MfUltralightReader reader = {};
mf_ul_reset(data);
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_prepare_tx_rx(nfc_worker->reader_analyzer, &tx_rx, true);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
}
uint32_t key = 0;
uint16_t pack = 0;
while(nfc_worker->state == NfcWorkerStateReadMfUltralightReadAuth) {
furi_hal_nfc_sleep();
if(furi_hal_nfc_detect(nfc_data, 300) && nfc_data->type == FuriHalNfcTypeA) {
if(mf_ul_check_card_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak)) {
nfc_worker->callback(NfcWorkerEventCardDetected, nfc_worker->context);
if(data->auth_method == MfUltralightAuthMethodManual) {
nfc_worker->callback(NfcWorkerEventMfUltralightPassKey, nfc_worker->context);
key = nfc_util_bytes2num(data->auth_key, 4);
} else if(data->auth_method == MfUltralightAuthMethodAmeebo) {
key = mf_ul_pwdgen_amiibo(nfc_data);
} else if(data->auth_method == MfUltralightAuthMethodXiaomi) {
key = mf_ul_pwdgen_xiaomi(nfc_data);
} else {
FURI_LOG_E(TAG, "Incorrect auth method");
break;
}
data->auth_success = mf_ultralight_authenticate(&tx_rx, key, &pack);
if(!data->auth_success) {
// Reset card
furi_hal_nfc_sleep();
if(!furi_hal_nfc_activate_nfca(300, NULL)) {
nfc_worker->callback(NfcWorkerEventFail, nfc_worker->context);
break;
}
}
mf_ul_read_card(&tx_rx, &reader, data);
if(data->auth_success) {
MfUltralightConfigPages* config_pages = mf_ultralight_get_config_pages(data);
if(config_pages != NULL) {
config_pages->auth_data.pwd.value = REVERSE_BYTES_U32(key);
config_pages->auth_data.pack.value = pack;
}
nfc_worker->callback(NfcWorkerEventSuccess, nfc_worker->context);
break;
} else {
nfc_worker->callback(NfcWorkerEventFail, nfc_worker->context);
break;
}
} else {
nfc_worker->callback(NfcWorkerEventWrongCardDetected, nfc_worker->context);
furi_delay_ms(10);
}
} else {
nfc_worker->callback(NfcWorkerEventNoCardDetected, nfc_worker->context);
furi_delay_ms(10);
}
}
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
reader_analyzer_stop(nfc_worker->reader_analyzer);
}
}
static void nfc_worker_reader_analyzer_callback(ReaderAnalyzerEvent event, void* context) {
furi_assert(context);
NfcWorker* nfc_worker = context;
if((nfc_worker->state == NfcWorkerStateAnalyzeReader) &&
(event == ReaderAnalyzerEventMfkeyCollected)) {
if(nfc_worker->callback) {
nfc_worker->callback(NfcWorkerEventDetectReaderMfkeyCollected, nfc_worker->context);
}
}
}
void nfc_worker_analyze_reader(NfcWorker* nfc_worker) {
furi_assert(nfc_worker);
furi_assert(nfc_worker->callback);
FuriHalNfcTxRxContext tx_rx = {};
ReaderAnalyzer* reader_analyzer = nfc_worker->reader_analyzer;
FuriHalNfcDevData* nfc_data = reader_analyzer_get_nfc_data(reader_analyzer);
MfClassicEmulator emulator = {
.cuid = nfc_util_bytes2num(&nfc_data->uid[nfc_data->uid_len - 4], 4),
.data = nfc_worker->dev_data->mf_classic_data,
.data_changed = false,
};
NfcaSignal* nfca_signal = nfca_signal_alloc();
tx_rx.nfca_signal = nfca_signal;
reader_analyzer_prepare_tx_rx(reader_analyzer, &tx_rx, true);
reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeMfkey);
reader_analyzer_set_callback(reader_analyzer, nfc_worker_reader_analyzer_callback, nfc_worker);
rfal_platform_spi_acquire();
FURI_LOG_D(TAG, "Start reader analyzer");
uint8_t reader_no_data_received_cnt = 0;
bool reader_no_data_notified = true;
while(nfc_worker->state == NfcWorkerStateAnalyzeReader) {
furi_hal_nfc_stop_cmd();
furi_delay_ms(5);
furi_hal_nfc_listen_start(nfc_data);
if(furi_hal_nfc_listen_rx(&tx_rx, 300)) {
if(reader_no_data_notified) {
nfc_worker->callback(NfcWorkerEventDetectReaderDetected, nfc_worker->context);
}
reader_no_data_received_cnt = 0;
reader_no_data_notified = false;
NfcProtocol protocol =
reader_analyzer_guess_protocol(reader_analyzer, tx_rx.rx_data, tx_rx.rx_bits / 8);
if(protocol == NfcDeviceProtocolMifareClassic) {
mf_classic_emulator(&emulator, &tx_rx);
}
} else {
reader_no_data_received_cnt++;
if(!reader_no_data_notified && (reader_no_data_received_cnt > 5)) {
nfc_worker->callback(NfcWorkerEventDetectReaderLost, nfc_worker->context);
reader_no_data_received_cnt = 0;
reader_no_data_notified = true;
}
FURI_LOG_D(TAG, "No data from reader");
continue;
}
}
rfal_platform_spi_release();
reader_analyzer_stop(nfc_worker->reader_analyzer);
nfca_signal_free(nfca_signal);
}
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