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unleashed-firmware/lib/nfc/nfc_device.c
g3gg0.de c10c45616d
SLIX2 emulation support / practical use for Dymo printers (#2783) 
* improve digital_signal for longer packets, also clean up code
* added SLIX2 specific features like signature and unknown keys (for issue #2781), added WRITE_PASSWORD handling
* fix NfcV AFI selection
* when NFCV_CMD_READ_MULTI_BLOCK reads beyond memory end, return the maximum possible block's content
* added SLIX2 reading
* fix NXP SYSTEMINFO response check size
* capture the first received password if none was set before
* clear stored data before reading SLIX details renamed slix2_dump functions to slix2_read
* display card block size values as decimal

Co-authored-by: あく <alleteam@gmail.com>
2023-06-29 02:44:34 +09:00

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#include "nfc_device.h"
#include "assets_icons.h"
#include "nfc_types.h"
#include <lib/toolbox/path.h>
#include <lib/toolbox/hex.h>
#include <lib/nfc/protocols/nfc_util.h>
#include <flipper_format/flipper_format.h>
#define TAG "NfcDevice"
#define NFC_DEVICE_KEYS_FOLDER EXT_PATH("nfc/.cache")
#define NFC_DEVICE_KEYS_EXTENSION ".keys"
static const char* nfc_file_header = "Flipper NFC device";
static const uint32_t nfc_file_version = 3;
static const char* nfc_keys_file_header = "Flipper NFC keys";
static const uint32_t nfc_keys_file_version = 1;
// Protocols format versions
static const uint32_t nfc_mifare_classic_data_format_version = 2;
static const uint32_t nfc_mifare_ultralight_data_format_version = 1;
NfcDevice* nfc_device_alloc() {
NfcDevice* nfc_dev = malloc(sizeof(NfcDevice));
nfc_dev->storage = furi_record_open(RECORD_STORAGE);
nfc_dev->dialogs = furi_record_open(RECORD_DIALOGS);
nfc_dev->load_path = furi_string_alloc();
nfc_dev->dev_data.parsed_data = furi_string_alloc();
nfc_dev->folder = furi_string_alloc();
// Rename cache folder name for backward compatibility
if(storage_common_stat(nfc_dev->storage, "/ext/nfc/cache", NULL) == FSE_OK) {
storage_common_rename(nfc_dev->storage, "/ext/nfc/cache", NFC_DEVICE_KEYS_FOLDER);
}
return nfc_dev;
}
void nfc_device_free(NfcDevice* nfc_dev) {
furi_assert(nfc_dev);
nfc_device_clear(nfc_dev);
furi_record_close(RECORD_STORAGE);
furi_record_close(RECORD_DIALOGS);
furi_string_free(nfc_dev->load_path);
furi_string_free(nfc_dev->dev_data.parsed_data);
furi_string_free(nfc_dev->folder);
free(nfc_dev);
}
static void nfc_device_prepare_format_string(NfcDevice* dev, FuriString* format_string) {
if(dev->format == NfcDeviceSaveFormatUid) {
furi_string_set(format_string, "UID");
} else if(dev->format == NfcDeviceSaveFormatBankCard) {
furi_string_set(format_string, "Bank card");
} else if(dev->format == NfcDeviceSaveFormatMifareUl) {
furi_string_set(format_string, nfc_mf_ul_type(dev->dev_data.mf_ul_data.type, true));
} else if(dev->format == NfcDeviceSaveFormatMifareClassic) {
furi_string_set(format_string, "Mifare Classic");
} else if(dev->format == NfcDeviceSaveFormatMifareDesfire) {
furi_string_set(format_string, "Mifare DESFire");
} else if(dev->format == NfcDeviceSaveFormatNfcV) {
furi_string_set(format_string, "ISO15693");
} else {
furi_string_set(format_string, "Unknown");
}
}
static bool nfc_device_parse_format_string(NfcDevice* dev, FuriString* format_string) {
if(furi_string_start_with_str(format_string, "UID")) {
dev->format = NfcDeviceSaveFormatUid;
dev->dev_data.protocol = NfcDeviceProtocolUnknown;
return true;
}
if(furi_string_start_with_str(format_string, "Bank card")) {
dev->format = NfcDeviceSaveFormatBankCard;
dev->dev_data.protocol = NfcDeviceProtocolEMV;
return true;
}
// Check Mifare Ultralight types
for(MfUltralightType type = MfUltralightTypeUnknown; type < MfUltralightTypeNum; type++) {
if(furi_string_equal(format_string, nfc_mf_ul_type(type, true))) {
dev->format = NfcDeviceSaveFormatMifareUl;
dev->dev_data.protocol = NfcDeviceProtocolMifareUl;
dev->dev_data.mf_ul_data.type = type;
return true;
}
}
if(furi_string_start_with_str(format_string, "Mifare Classic")) {
dev->format = NfcDeviceSaveFormatMifareClassic;
dev->dev_data.protocol = NfcDeviceProtocolMifareClassic;
return true;
}
if(furi_string_start_with_str(format_string, "Mifare DESFire")) {
dev->format = NfcDeviceSaveFormatMifareDesfire;
dev->dev_data.protocol = NfcDeviceProtocolMifareDesfire;
return true;
}
if(furi_string_start_with_str(format_string, "ISO15693")) {
dev->format = NfcDeviceSaveFormatNfcV;
dev->dev_data.protocol = NfcDeviceProtocolNfcV;
return true;
}
return false;
}
static bool nfc_device_save_mifare_ul_data(FlipperFormat* file, NfcDevice* dev) {
bool saved = false;
MfUltralightData* data = &dev->dev_data.mf_ul_data;
FuriString* temp_str;
temp_str = furi_string_alloc();
// Save Mifare Ultralight specific data
do {
if(!flipper_format_write_comment_cstr(file, "Mifare Ultralight specific data")) break;
if(!flipper_format_write_uint32(
file, "Data format version", &nfc_mifare_ultralight_data_format_version, 1))
break;
if(!flipper_format_write_hex(file, "Signature", data->signature, sizeof(data->signature)))
break;
if(!flipper_format_write_hex(
file, "Mifare version", (uint8_t*)&data->version, sizeof(data->version)))
break;
// Write conters and tearing flags data
bool counters_saved = true;
for(uint8_t i = 0; i < 3; i++) {
furi_string_printf(temp_str, "Counter %d", i);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(temp_str), &data->counter[i], 1)) {
counters_saved = false;
break;
}
furi_string_printf(temp_str, "Tearing %d", i);
if(!flipper_format_write_hex(
file, furi_string_get_cstr(temp_str), &data->tearing[i], 1)) {
counters_saved = false;
break;
}
}
if(!counters_saved) break;
// Write pages data
uint32_t pages_total = data->data_size / 4;
if(!flipper_format_write_uint32(file, "Pages total", &pages_total, 1)) break;
uint32_t pages_read = data->data_read / 4;
if(!flipper_format_write_uint32(file, "Pages read", &pages_read, 1)) break;
bool pages_saved = true;
for(uint16_t i = 0; i < data->data_size; i += 4) {
furi_string_printf(temp_str, "Page %d", i / 4);
if(!flipper_format_write_hex(file, furi_string_get_cstr(temp_str), &data->data[i], 4)) {
pages_saved = false;
break;
}
}
if(!pages_saved) break;
// Write authentication counter
uint32_t auth_counter = data->curr_authlim;
if(!flipper_format_write_uint32(file, "Failed authentication attempts", &auth_counter, 1))
break;
saved = true;
} while(false);
furi_string_free(temp_str);
return saved;
}
bool nfc_device_load_mifare_ul_data(FlipperFormat* file, NfcDevice* dev) {
bool parsed = false;
MfUltralightData* data = &dev->dev_data.mf_ul_data;
FuriString* temp_str;
temp_str = furi_string_alloc();
uint32_t data_format_version = 0;
do {
// Read Mifare Ultralight format version
if(!flipper_format_read_uint32(file, "Data format version", &data_format_version, 1)) {
if(!flipper_format_rewind(file)) break;
}
// Read signature
if(!flipper_format_read_hex(file, "Signature", data->signature, sizeof(data->signature)))
break;
// Read Mifare version
if(!flipper_format_read_hex(
file, "Mifare version", (uint8_t*)&data->version, sizeof(data->version)))
break;
// Read counters and tearing flags
bool counters_parsed = true;
for(uint8_t i = 0; i < 3; i++) {
furi_string_printf(temp_str, "Counter %d", i);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(temp_str), &data->counter[i], 1)) {
counters_parsed = false;
break;
}
furi_string_printf(temp_str, "Tearing %d", i);
if(!flipper_format_read_hex(
file, furi_string_get_cstr(temp_str), &data->tearing[i], 1)) {
counters_parsed = false;
break;
}
}
if(!counters_parsed) break;
// Read pages
uint32_t pages_total = 0;
if(!flipper_format_read_uint32(file, "Pages total", &pages_total, 1)) break;
uint32_t pages_read = 0;
if(data_format_version < nfc_mifare_ultralight_data_format_version) {
pages_read = pages_total;
} else {
if(!flipper_format_read_uint32(file, "Pages read", &pages_read, 1)) break;
}
data->data_size = pages_total * 4;
data->data_read = pages_read * 4;
if(data->data_size > MF_UL_MAX_DUMP_SIZE || data->data_read > MF_UL_MAX_DUMP_SIZE) break;
bool pages_parsed = true;
for(uint16_t i = 0; i < pages_total; i++) {
furi_string_printf(temp_str, "Page %d", i);
if(!flipper_format_read_hex(
file, furi_string_get_cstr(temp_str), &data->data[i * 4], 4)) {
pages_parsed = false;
break;
}
}
if(!pages_parsed) break;
// Read authentication counter
uint32_t auth_counter;
if(!flipper_format_read_uint32(file, "Failed authentication attempts", &auth_counter, 1))
auth_counter = 0;
data->curr_authlim = auth_counter;
data->auth_success = mf_ul_is_full_capture(data);
parsed = true;
} while(false);
furi_string_free(temp_str);
return parsed;
}
static bool nfc_device_save_mifare_df_key_settings(
FlipperFormat* file,
MifareDesfireKeySettings* ks,
const char* prefix) {
bool saved = false;
FuriString* key;
key = furi_string_alloc();
do {
furi_string_printf(key, "%s Change Key ID", prefix);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &ks->change_key_id, 1))
break;
furi_string_printf(key, "%s Config Changeable", prefix);
if(!flipper_format_write_bool(file, furi_string_get_cstr(key), &ks->config_changeable, 1))
break;
furi_string_printf(key, "%s Free Create Delete", prefix);
if(!flipper_format_write_bool(file, furi_string_get_cstr(key), &ks->free_create_delete, 1))
break;
furi_string_printf(key, "%s Free Directory List", prefix);
if(!flipper_format_write_bool(file, furi_string_get_cstr(key), &ks->free_directory_list, 1))
break;
furi_string_printf(key, "%s Key Changeable", prefix);
if(!flipper_format_write_bool(
file, furi_string_get_cstr(key), &ks->master_key_changeable, 1))
break;
if(ks->flags) {
furi_string_printf(key, "%s Flags", prefix);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &ks->flags, 1)) break;
}
furi_string_printf(key, "%s Max Keys", prefix);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &ks->max_keys, 1)) break;
for(MifareDesfireKeyVersion* kv = ks->key_version_head; kv; kv = kv->next) {
furi_string_printf(key, "%s Key %d Version", prefix, kv->id);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &kv->version, 1)) break;
}
saved = true;
} while(false);
furi_string_free(key);
return saved;
}
bool nfc_device_load_mifare_df_key_settings(
FlipperFormat* file,
MifareDesfireKeySettings* ks,
const char* prefix) {
bool parsed = false;
FuriString* key;
key = furi_string_alloc();
do {
furi_string_printf(key, "%s Change Key ID", prefix);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), &ks->change_key_id, 1)) break;
furi_string_printf(key, "%s Config Changeable", prefix);
if(!flipper_format_read_bool(file, furi_string_get_cstr(key), &ks->config_changeable, 1))
break;
furi_string_printf(key, "%s Free Create Delete", prefix);
if(!flipper_format_read_bool(file, furi_string_get_cstr(key), &ks->free_create_delete, 1))
break;
furi_string_printf(key, "%s Free Directory List", prefix);
if(!flipper_format_read_bool(file, furi_string_get_cstr(key), &ks->free_directory_list, 1))
break;
furi_string_printf(key, "%s Key Changeable", prefix);
if(!flipper_format_read_bool(
file, furi_string_get_cstr(key), &ks->master_key_changeable, 1))
break;
furi_string_printf(key, "%s Flags", prefix);
if(flipper_format_key_exist(file, furi_string_get_cstr(key))) {
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), &ks->flags, 1)) break;
}
furi_string_printf(key, "%s Max Keys", prefix);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), &ks->max_keys, 1)) break;
ks->flags |= ks->max_keys >> 4;
ks->max_keys &= 0xF;
MifareDesfireKeyVersion** kv_head = &ks->key_version_head;
for(int key_id = 0; key_id < ks->max_keys; key_id++) {
furi_string_printf(key, "%s Key %d Version", prefix, key_id);
uint8_t version;
if(flipper_format_read_hex(file, furi_string_get_cstr(key), &version, 1)) {
MifareDesfireKeyVersion* kv = malloc(sizeof(MifareDesfireKeyVersion));
memset(kv, 0, sizeof(MifareDesfireKeyVersion));
kv->id = key_id;
kv->version = version;
*kv_head = kv;
kv_head = &kv->next;
}
}
parsed = true;
} while(false);
furi_string_free(key);
return parsed;
}
static bool nfc_device_save_mifare_df_app(FlipperFormat* file, MifareDesfireApplication* app) {
bool saved = false;
FuriString *prefix, *key;
prefix =
furi_string_alloc_printf("Application %02x%02x%02x", app->id[0], app->id[1], app->id[2]);
key = furi_string_alloc();
uint8_t* tmp = NULL;
do {
if(app->key_settings) {
if(!nfc_device_save_mifare_df_key_settings(
file, app->key_settings, furi_string_get_cstr(prefix)))
break;
}
if(!app->file_head) break;
uint32_t n_files = 0;
for(MifareDesfireFile* f = app->file_head; f; f = f->next) {
n_files++;
}
tmp = malloc(n_files);
int i = 0;
for(MifareDesfireFile* f = app->file_head; f; f = f->next) {
tmp[i++] = f->id;
}
furi_string_printf(key, "%s File IDs", furi_string_get_cstr(prefix));
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), tmp, n_files)) break;
bool saved_files = true;
for(MifareDesfireFile* f = app->file_head; f; f = f->next) {
saved_files = false;
furi_string_printf(key, "%s File %d Type", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &f->type, 1)) break;
furi_string_printf(
key, "%s File %d Communication Settings", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), &f->comm, 1)) break;
furi_string_printf(
key, "%s File %d Access Rights", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_hex(
file, furi_string_get_cstr(key), (uint8_t*)&f->access_rights, 2))
break;
uint16_t size = 0;
if(f->type == MifareDesfireFileTypeStandard ||
f->type == MifareDesfireFileTypeBackup) {
size = f->settings.data.size;
furi_string_printf(key, "%s File %d Size", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.data.size, 1))
break;
} else if(f->type == MifareDesfireFileTypeValue) {
furi_string_printf(
key, "%s File %d Hi Limit", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.value.hi_limit, 1))
break;
furi_string_printf(
key, "%s File %d Lo Limit", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.value.lo_limit, 1))
break;
furi_string_printf(
key, "%s File %d Limited Credit Value", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.value.limited_credit_value, 1))
break;
furi_string_printf(
key, "%s File %d Limited Credit Enabled", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_bool(
file,
furi_string_get_cstr(key),
&f->settings.value.limited_credit_enabled,
1))
break;
size = 4;
} else if(
f->type == MifareDesfireFileTypeLinearRecord ||
f->type == MifareDesfireFileTypeCyclicRecord) {
furi_string_printf(key, "%s File %d Size", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.record.size, 1))
break;
furi_string_printf(key, "%s File %d Max", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.record.max, 1))
break;
furi_string_printf(key, "%s File %d Cur", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_uint32(
file, furi_string_get_cstr(key), &f->settings.record.cur, 1))
break;
size = f->settings.record.size * f->settings.record.cur;
}
if(f->contents) {
furi_string_printf(key, "%s File %d", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_write_hex(file, furi_string_get_cstr(key), f->contents, size))
break;
}
saved_files = true;
}
if(!saved_files) {
break;
}
saved = true;
} while(false);
free(tmp);
furi_string_free(prefix);
furi_string_free(key);
return saved;
}
bool nfc_device_load_mifare_df_app(FlipperFormat* file, MifareDesfireApplication* app) {
bool parsed = false;
FuriString *prefix, *key;
prefix =
furi_string_alloc_printf("Application %02x%02x%02x", app->id[0], app->id[1], app->id[2]);
key = furi_string_alloc();
uint8_t* tmp = NULL;
MifareDesfireFile* f = NULL;
do {
app->key_settings = malloc(sizeof(MifareDesfireKeySettings));
memset(app->key_settings, 0, sizeof(MifareDesfireKeySettings));
if(!nfc_device_load_mifare_df_key_settings(
file, app->key_settings, furi_string_get_cstr(prefix))) {
free(app->key_settings);
app->key_settings = NULL;
break;
}
furi_string_printf(key, "%s File IDs", furi_string_get_cstr(prefix));
uint32_t n_files;
if(!flipper_format_get_value_count(file, furi_string_get_cstr(key), &n_files)) break;
tmp = malloc(n_files);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), tmp, n_files)) break;
MifareDesfireFile** file_head = &app->file_head;
bool parsed_files = true;
for(uint32_t i = 0; i < n_files; i++) {
parsed_files = false;
f = malloc(sizeof(MifareDesfireFile));
memset(f, 0, sizeof(MifareDesfireFile));
f->id = tmp[i];
furi_string_printf(key, "%s File %d Type", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), &f->type, 1)) break;
furi_string_printf(
key, "%s File %d Communication Settings", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), &f->comm, 1)) break;
furi_string_printf(
key, "%s File %d Access Rights", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_hex(
file, furi_string_get_cstr(key), (uint8_t*)&f->access_rights, 2))
break;
if(f->type == MifareDesfireFileTypeStandard ||
f->type == MifareDesfireFileTypeBackup) {
furi_string_printf(key, "%s File %d Size", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.data.size, 1))
break;
} else if(f->type == MifareDesfireFileTypeValue) {
furi_string_printf(
key, "%s File %d Hi Limit", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.value.hi_limit, 1))
break;
furi_string_printf(
key, "%s File %d Lo Limit", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.value.lo_limit, 1))
break;
furi_string_printf(
key, "%s File %d Limited Credit Value", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.value.limited_credit_value, 1))
break;
furi_string_printf(
key, "%s File %d Limited Credit Enabled", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_bool(
file,
furi_string_get_cstr(key),
&f->settings.value.limited_credit_enabled,
1))
break;
} else if(
f->type == MifareDesfireFileTypeLinearRecord ||
f->type == MifareDesfireFileTypeCyclicRecord) {
furi_string_printf(key, "%s File %d Size", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.record.size, 1))
break;
furi_string_printf(key, "%s File %d Max", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.record.max, 1))
break;
furi_string_printf(key, "%s File %d Cur", furi_string_get_cstr(prefix), f->id);
if(!flipper_format_read_uint32(
file, furi_string_get_cstr(key), &f->settings.record.cur, 1))
break;
}
furi_string_printf(key, "%s File %d", furi_string_get_cstr(prefix), f->id);
if(flipper_format_key_exist(file, furi_string_get_cstr(key))) {
uint32_t size;
if(!flipper_format_get_value_count(file, furi_string_get_cstr(key), &size)) break;
f->contents = malloc(size);
if(!flipper_format_read_hex(file, furi_string_get_cstr(key), f->contents, size))
break;
}
*file_head = f;
file_head = &f->next;
f = NULL;
parsed_files = true;
}
if(!parsed_files) {
break;
}
parsed = true;
} while(false);
if(f) {
free(f->contents);
free(f);
}
free(tmp);
furi_string_free(prefix);
furi_string_free(key);
return parsed;
}
static bool nfc_device_save_mifare_df_data(FlipperFormat* file, NfcDevice* dev) {
bool saved = false;
MifareDesfireData* data = &dev->dev_data.mf_df_data;
uint8_t* tmp = NULL;
do {
if(!flipper_format_write_comment_cstr(file, "Mifare DESFire specific data")) break;
if(!flipper_format_write_hex(
file, "PICC Version", (uint8_t*)&data->version, sizeof(data->version)))
break;
if(data->free_memory) {
if(!flipper_format_write_uint32(file, "PICC Free Memory", &data->free_memory->bytes, 1))
break;
}
if(data->master_key_settings) {
if(!nfc_device_save_mifare_df_key_settings(file, data->master_key_settings, "PICC"))
break;
}
uint32_t n_apps = 0;
for(MifareDesfireApplication* app = data->app_head; app; app = app->next) {
n_apps++;
}
if(!flipper_format_write_uint32(file, "Application Count", &n_apps, 1)) break;
if(n_apps) {
tmp = malloc(n_apps * 3);
int i = 0;
for(MifareDesfireApplication* app = data->app_head; app; app = app->next) {
memcpy(tmp + i, app->id, 3); //-V769
i += 3;
}
if(!flipper_format_write_hex(file, "Application IDs", tmp, n_apps * 3)) break;
for(MifareDesfireApplication* app = data->app_head; app; app = app->next) {
if(!nfc_device_save_mifare_df_app(file, app)) break;
}
}
saved = true;
} while(false);
free(tmp);
return saved;
}
bool nfc_device_load_mifare_df_data(FlipperFormat* file, NfcDevice* dev) {
bool parsed = false;
MifareDesfireData* data = &dev->dev_data.mf_df_data;
memset(data, 0, sizeof(MifareDesfireData));
uint8_t* tmp = NULL;
do {
if(!flipper_format_read_hex(
file, "PICC Version", (uint8_t*)&data->version, sizeof(data->version)))
break;
if(flipper_format_key_exist(file, "PICC Free Memory")) {
data->free_memory = malloc(sizeof(MifareDesfireFreeMemory));
memset(data->free_memory, 0, sizeof(MifareDesfireFreeMemory));
if(!flipper_format_read_uint32(
file, "PICC Free Memory", &data->free_memory->bytes, 1)) {
free(data->free_memory);
break;
}
}
if(flipper_format_key_exist(file, "PICC Change Key ID")) {
data->master_key_settings = malloc(sizeof(MifareDesfireKeySettings));
memset(data->master_key_settings, 0, sizeof(MifareDesfireKeySettings));
if(!nfc_device_load_mifare_df_key_settings(file, data->master_key_settings, "PICC")) {
free(data->master_key_settings);
data->master_key_settings = NULL;
break;
}
}
uint32_t n_apps;
if(!flipper_format_read_uint32(file, "Application Count", &n_apps, 1)) break;
if(n_apps) {
tmp = malloc(n_apps * 3);
if(!flipper_format_read_hex(file, "Application IDs", tmp, n_apps * 3)) break;
bool parsed_apps = true;
MifareDesfireApplication** app_head = &data->app_head;
for(uint32_t i = 0; i < n_apps; i++) {
MifareDesfireApplication* app = malloc(sizeof(MifareDesfireApplication));
memset(app, 0, sizeof(MifareDesfireApplication));
memcpy(app->id, &tmp[i * 3], 3);
if(!nfc_device_load_mifare_df_app(file, app)) {
free(app);
parsed_apps = false;
break;
}
*app_head = app;
app_head = &app->next;
}
if(!parsed_apps) {
// accept non-parsed apps, just log a warning:
FURI_LOG_W(TAG, "Non-parsed apps found!");
}
}
parsed = true;
} while(false);
free(tmp);
return parsed;
}
static bool nfc_device_save_slix_data(
FlipperFormat* file,
NfcDevice* dev,
SlixTypeFeatures features,
const char* type) {
bool saved = false;
NfcVSlixData* data = &dev->dev_data.nfcv_data.sub_data.slix;
do {
char msg[64];
snprintf(msg, sizeof(msg), "%s specific data", type);
if(!flipper_format_write_comment_cstr(file, msg)) break;
if(!flipper_format_write_comment_cstr(
file, "Passwords are optional. If password is omitted, any password is accepted"))
break;
if(features & SlixFeatureRead) {
if(data->flags & NfcVSlixDataFlagsHasKeyRead) {
if(!flipper_format_write_hex(
file, "Password Read", data->key_read, sizeof(data->key_read)))
break;
}
}
if(features & SlixFeatureWrite) {
if(data->flags & NfcVSlixDataFlagsHasKeyWrite) {
if(!flipper_format_write_hex(
file, "Password Write", data->key_write, sizeof(data->key_write)))
break;
}
}
if(features & SlixFeaturePrivacy) {
if(data->flags & NfcVSlixDataFlagsHasKeyPrivacy) {
if(!flipper_format_write_hex(
file, "Password Privacy", data->key_privacy, sizeof(data->key_privacy)))
break;
}
}
if(features & SlixFeatureDestroy) {
if(data->flags & NfcVSlixDataFlagsHasKeyDestroy) {
if(!flipper_format_write_hex(
file, "Password Destroy", data->key_destroy, sizeof(data->key_destroy)))
break;
}
}
if(features & SlixFeatureEas) {
if(data->flags & NfcVSlixDataFlagsHasKeyEas) {
if(!flipper_format_write_hex(
file, "Password EAS", data->key_eas, sizeof(data->key_eas)))
break;
}
}
if(features & SlixFeatureSignature) {
if(!flipper_format_write_comment_cstr(
file,
"This is the card's secp128r1 elliptic curve signature. It can not be calculated without knowing NXP's private key."))
break;
if(!flipper_format_write_hex(
file, "Signature", data->signature, sizeof(data->signature)))
break;
}
if(features & SlixFeaturePrivacy) {
bool privacy = (data->flags & NfcVSlixDataFlagsPrivacy) ? true : false;
if(!flipper_format_write_bool(file, "Privacy Mode", &privacy, 1)) break;
}
if(features & SlixFeatureProtection) {
if(!flipper_format_write_comment_cstr(file, "Protection pointer configuration")) break;
if(!flipper_format_write_hex(file, "Protection pointer", &data->pp_pointer, 1)) break;
if(!flipper_format_write_hex(file, "Protection condition", &data->pp_condition, 1))
break;
}
saved = true;
} while(false);
return saved;
}
bool nfc_device_load_slix_data(FlipperFormat* file, NfcDevice* dev, SlixTypeFeatures features) {
bool parsed = false;
NfcVSlixData* data = &dev->dev_data.nfcv_data.sub_data.slix;
memset(data, 0, sizeof(NfcVSlixData));
do {
data->flags = 0;
if(features & SlixFeatureRead) {
if(flipper_format_key_exist(file, "Password Read")) {
if(!flipper_format_read_hex(
file, "Password Read", data->key_read, sizeof(data->key_read))) {
FURI_LOG_D(TAG, "Failed reading Password Read");
break;
}
data->flags |= NfcVSlixDataFlagsHasKeyRead;
}
}
if(features & SlixFeatureWrite) {
if(flipper_format_key_exist(file, "Password Write")) {
if(!flipper_format_read_hex(
file, "Password Write", data->key_write, sizeof(data->key_write))) {
FURI_LOG_D(TAG, "Failed reading Password Write");
break;
}
data->flags |= NfcVSlixDataFlagsHasKeyWrite;
}
}
if(features & SlixFeaturePrivacy) {
if(flipper_format_key_exist(file, "Password Privacy")) {
if(!flipper_format_read_hex(
file, "Password Privacy", data->key_privacy, sizeof(data->key_privacy))) {
FURI_LOG_D(TAG, "Failed reading Password Privacy");
break;
}
data->flags |= NfcVSlixDataFlagsHasKeyPrivacy;
}
}
if(features & SlixFeatureDestroy) {
if(flipper_format_key_exist(file, "Password Destroy")) {
if(!flipper_format_read_hex(
file, "Password Destroy", data->key_destroy, sizeof(data->key_destroy))) {
FURI_LOG_D(TAG, "Failed reading Password Destroy");
break;
}
data->flags |= NfcVSlixDataFlagsHasKeyDestroy;
}
}
if(features & SlixFeatureEas) {
if(flipper_format_key_exist(file, "Password EAS")) {
if(!flipper_format_read_hex(
file, "Password EAS", data->key_eas, sizeof(data->key_eas))) {
FURI_LOG_D(TAG, "Failed reading Password EAS");
break;
}
data->flags |= NfcVSlixDataFlagsHasKeyEas;
}
}
if(features & SlixFeatureSignature) {
if(!flipper_format_read_hex(
file, "Signature", data->signature, sizeof(data->signature))) {
FURI_LOG_D(TAG, "Failed reading Signature");
break;
}
}
if(features & SlixFeaturePrivacy) {
bool privacy;
if(!flipper_format_read_bool(file, "Privacy Mode", &privacy, 1)) {
FURI_LOG_D(TAG, "Failed reading Privacy Mode");
break;
}
if(privacy) {
data->flags |= NfcVSlixDataFlagsPrivacy;
}
}
if(features & SlixFeatureProtection) {
if(!flipper_format_read_hex(file, "Protection pointer", &(data->pp_pointer), 1)) {
FURI_LOG_D(TAG, "Failed reading Protection pointer");
break;
}
if(!flipper_format_read_hex(file, "Protection condition", &(data->pp_condition), 1)) {
FURI_LOG_D(TAG, "Failed reading Protection condition");
break;
}
}
parsed = true;
} while(false);
return parsed;
}
static bool nfc_device_save_nfcv_data(FlipperFormat* file, NfcDevice* dev) {
bool saved = false;
NfcVData* data = &dev->dev_data.nfcv_data;
do {
uint32_t temp_uint32 = 0;
uint8_t temp_uint8 = 0;
if(!flipper_format_write_comment_cstr(file, "Data Storage Format Identifier")) break;
if(!flipper_format_write_hex(file, "DSFID", &(data->dsfid), 1)) break;
if(!flipper_format_write_comment_cstr(file, "Application Family Identifier")) break;
if(!flipper_format_write_hex(file, "AFI", &(data->afi), 1)) break;
if(!flipper_format_write_hex(file, "IC Reference", &(data->ic_ref), 1)) break;
temp_uint32 = data->block_num;
if(!flipper_format_write_comment_cstr(file, "Number of memory blocks, usually 0 to 256"))
break;
if(!flipper_format_write_uint32(file, "Block Count", &temp_uint32, 1)) break;
if(!flipper_format_write_comment_cstr(file, "Size of a single memory block, usually 4"))
break;
if(!flipper_format_write_hex(file, "Block Size", &(data->block_size), 1)) break;
if(!flipper_format_write_hex(
file, "Data Content", data->data, data->block_num * data->block_size))
break;
if(!flipper_format_write_comment_cstr(
file,
"First byte: DSFID (0x01) / AFI (0x02) / EAS (0x04) / PPL (0x08) lock info, others: block lock info"))
break;
if(!flipper_format_write_hex(
file, "Security Status", data->security_status, 1 + data->block_num))
break;
if(!flipper_format_write_comment_cstr(
file,
"Subtype of this card (0 = ISO15693, 1 = SLIX, 2 = SLIX-S, 3 = SLIX-L, 4 = SLIX2)"))
break;
temp_uint8 = (uint8_t)data->sub_type;
if(!flipper_format_write_hex(file, "Subtype", &temp_uint8, 1)) break;
switch(data->sub_type) {
case NfcVTypePlain:
if(!flipper_format_write_comment_cstr(file, "End of ISO15693 parameters")) break;
saved = true;
break;
case NfcVTypeSlix:
saved = nfc_device_save_slix_data(file, dev, SlixFeatureSlix, "SLIX");
break;
case NfcVTypeSlixS:
saved = nfc_device_save_slix_data(file, dev, SlixFeatureSlixS, "SLIX-S");
break;
case NfcVTypeSlixL:
saved = nfc_device_save_slix_data(file, dev, SlixFeatureSlixL, "SLIX-L");
break;
case NfcVTypeSlix2:
saved = nfc_device_save_slix_data(file, dev, SlixFeatureSlix2, "SLIX2");
break;
default:
break;
}
} while(false);
return saved;
}
bool nfc_device_load_nfcv_data(FlipperFormat* file, NfcDevice* dev) {
bool parsed = false;
NfcVData* data = &dev->dev_data.nfcv_data;
memset(data, 0x00, sizeof(NfcVData));
do {
uint32_t temp_uint32 = 0;
uint8_t temp_value = 0;
if(!flipper_format_read_hex(file, "DSFID", &(data->dsfid), 1)) {
FURI_LOG_D(TAG, "Failed reading DSFID");
break;
}
if(!flipper_format_read_hex(file, "AFI", &(data->afi), 1)) {
FURI_LOG_D(TAG, "Failed reading AFI");
break;
}
if(!flipper_format_read_hex(file, "IC Reference", &(data->ic_ref), 1)) {
FURI_LOG_D(TAG, "Failed reading IC Reference");
break;
}
if(!flipper_format_read_uint32(file, "Block Count", &temp_uint32, 1)) {
FURI_LOG_D(TAG, "Failed reading Block Count");
break;
}
data->block_num = temp_uint32;
if(!flipper_format_read_hex(file, "Block Size", &(data->block_size), 1)) {
FURI_LOG_D(TAG, "Failed reading Block Size");
break;
}
if(!flipper_format_read_hex(
file, "Data Content", data->data, data->block_num * data->block_size)) {
FURI_LOG_D(TAG, "Failed reading Data Content");
break;
}
/* optional, as added later */
if(flipper_format_key_exist(file, "Security Status")) {
if(!flipper_format_read_hex(
file, "Security Status", data->security_status, 1 + data->block_num)) {
FURI_LOG_D(TAG, "Failed reading Security Status");
break;
}
}
if(!flipper_format_read_hex(file, "Subtype", &temp_value, 1)) {
FURI_LOG_D(TAG, "Failed reading Subtype");
break;
}
data->sub_type = temp_value;
switch(data->sub_type) {
case NfcVTypePlain:
parsed = true;
break;
case NfcVTypeSlix:
parsed = nfc_device_load_slix_data(file, dev, SlixFeatureSlix);
break;
case NfcVTypeSlixS:
parsed = nfc_device_load_slix_data(file, dev, SlixFeatureSlixS);
break;
case NfcVTypeSlixL:
parsed = nfc_device_load_slix_data(file, dev, SlixFeatureSlixL);
break;
case NfcVTypeSlix2:
parsed = nfc_device_load_slix_data(file, dev, SlixFeatureSlix2);
break;
default:
break;
}
} while(false);
return parsed;
}
static bool nfc_device_save_bank_card_data(FlipperFormat* file, NfcDevice* dev) {
bool saved = false;
EmvData* data = &dev->dev_data.emv_data;
uint32_t data_temp = 0;
do {
// Write Bank card specific data
if(!flipper_format_write_comment_cstr(file, "Bank card specific data")) break;
if(!flipper_format_write_hex(file, "AID", data->aid, data->aid_len)) break;
if(!flipper_format_write_string_cstr(file, "Name", data->name)) break;
if(!flipper_format_write_hex(file, "Number", data->number, data->number_len)) break;
if(data->exp_mon) {
uint8_t exp_data[2] = {data->exp_mon, data->exp_year};
if(!flipper_format_write_hex(file, "Exp data", exp_data, sizeof(exp_data))) break;
}
if(data->country_code) {
data_temp = data->country_code;
if(!flipper_format_write_uint32(file, "Country code", &data_temp, 1)) break;
}
if(data->currency_code) {
data_temp = data->currency_code;
if(!flipper_format_write_uint32(file, "Currency code", &data_temp, 1)) break;
}
saved = true;
} while(false);
return saved;
}
bool nfc_device_load_bank_card_data(FlipperFormat* file, NfcDevice* dev) {
bool parsed = false;
EmvData* data = &dev->dev_data.emv_data;
memset(data, 0, sizeof(EmvData));
uint32_t data_cnt = 0;
FuriString* temp_str;
temp_str = furi_string_alloc();
do {
// Load essential data
if(!flipper_format_get_value_count(file, "AID", &data_cnt)) break;
data->aid_len = data_cnt;
if(!flipper_format_read_hex(file, "AID", data->aid, data->aid_len)) break;
if(!flipper_format_read_string(file, "Name", temp_str)) break;
strlcpy(data->name, furi_string_get_cstr(temp_str), sizeof(data->name));
if(!flipper_format_get_value_count(file, "Number", &data_cnt)) break;
data->number_len = data_cnt;
if(!flipper_format_read_hex(file, "Number", data->number, data->number_len)) break;
parsed = true;
// Load optional data
uint8_t exp_data[2] = {};
if(flipper_format_read_hex(file, "Exp data", exp_data, 2)) {
data->exp_mon = exp_data[0];
data->exp_year = exp_data[1];
}
if(flipper_format_read_uint32(file, "Country code", &data_cnt, 1)) {
data->country_code = data_cnt;
}
if(flipper_format_read_uint32(file, "Currency code", &data_cnt, 1)) {
data->currency_code = data_cnt;
}
} while(false);
furi_string_free(temp_str);
return parsed;
}
static void nfc_device_write_mifare_classic_block(
FuriString* block_str,
MfClassicData* data,
uint8_t block_num) {
furi_string_reset(block_str);
bool is_sec_trailer = mf_classic_is_sector_trailer(block_num);
if(is_sec_trailer) {
uint8_t sector_num = mf_classic_get_sector_by_block(block_num);
MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, sector_num);
// Write key A
for(size_t i = 0; i < sizeof(sec_tr->key_a); i++) {
if(mf_classic_is_key_found(data, sector_num, MfClassicKeyA)) {
furi_string_cat_printf(block_str, "%02X ", sec_tr->key_a[i]);
} else {
furi_string_cat_printf(block_str, "?? ");
}
}
// Write Access bytes
for(size_t i = 0; i < MF_CLASSIC_ACCESS_BYTES_SIZE; i++) {
if(mf_classic_is_block_read(data, block_num)) {
furi_string_cat_printf(block_str, "%02X ", sec_tr->access_bits[i]);
} else {
furi_string_cat_printf(block_str, "?? ");
}
}
// Write key B
for(size_t i = 0; i < sizeof(sec_tr->key_b); i++) {
if(mf_classic_is_key_found(data, sector_num, MfClassicKeyB)) {
furi_string_cat_printf(block_str, "%02X ", sec_tr->key_b[i]);
} else {
furi_string_cat_printf(block_str, "?? ");
}
}
} else {
// Write data block
for(size_t i = 0; i < MF_CLASSIC_BLOCK_SIZE; i++) {
if(mf_classic_is_block_read(data, block_num)) {
furi_string_cat_printf(block_str, "%02X ", data->block[block_num].value[i]);
} else {
furi_string_cat_printf(block_str, "?? ");
}
}
}
furi_string_trim(block_str);
}
static bool nfc_device_save_mifare_classic_data(FlipperFormat* file, NfcDevice* dev) {
bool saved = false;
MfClassicData* data = &dev->dev_data.mf_classic_data;
FuriString* temp_str;
temp_str = furi_string_alloc();
uint16_t blocks = 0;
// Save Mifare Classic specific data
do {
if(!flipper_format_write_comment_cstr(file, "Mifare Classic specific data")) break;
if(data->type == MfClassicTypeMini) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "MINI")) break;
blocks = 20;
} else if(data->type == MfClassicType1k) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "1K")) break;
blocks = 64;
} else if(data->type == MfClassicType4k) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "4K")) break;
blocks = 256;
}
if(!flipper_format_write_uint32(
file, "Data format version", &nfc_mifare_classic_data_format_version, 1))
break;
if(!flipper_format_write_comment_cstr(
file, "Mifare Classic blocks, \'??\' means unknown data"))
break;
bool block_saved = true;
FuriString* block_str;
block_str = furi_string_alloc();
for(size_t i = 0; i < blocks; i++) {
furi_string_printf(temp_str, "Block %d", i);
nfc_device_write_mifare_classic_block(block_str, data, i);
if(!flipper_format_write_string(file, furi_string_get_cstr(temp_str), block_str)) {
block_saved = false;
break;
}
}
furi_string_free(block_str);
if(!block_saved) break;
saved = true;
} while(false);
furi_string_free(temp_str);
return saved;
}
static void nfc_device_load_mifare_classic_block(
FuriString* block_str,
MfClassicData* data,
uint8_t block_num) {
furi_string_trim(block_str);
MfClassicBlock block_tmp = {};
bool is_sector_trailer = mf_classic_is_sector_trailer(block_num);
uint8_t sector_num = mf_classic_get_sector_by_block(block_num);
uint16_t block_unknown_bytes_mask = 0;
furi_string_trim(block_str);
for(size_t i = 0; i < MF_CLASSIC_BLOCK_SIZE; i++) {
char hi = furi_string_get_char(block_str, 3 * i);
char low = furi_string_get_char(block_str, 3 * i + 1);
uint8_t byte = 0;
if(hex_char_to_uint8(hi, low, &byte)) {
block_tmp.value[i] = byte;
} else {
FURI_BIT_SET(block_unknown_bytes_mask, i);
}
}
if(block_unknown_bytes_mask == 0xffff) {
// All data is unknown, exit
return;
}
if(is_sector_trailer) {
MfClassicSectorTrailer* sec_tr_tmp = (MfClassicSectorTrailer*)&block_tmp;
// Load Key A
// Key A mask 0b0000000000111111 = 0x003f
if((block_unknown_bytes_mask & 0x003f) == 0) {
uint64_t key = nfc_util_bytes2num(sec_tr_tmp->key_a, sizeof(sec_tr_tmp->key_a));
mf_classic_set_key_found(data, sector_num, MfClassicKeyA, key);
}
// Load Access Bits
// Access bits mask 0b0000001111000000 = 0x03c0
if((block_unknown_bytes_mask & 0x03c0) == 0) {
mf_classic_set_block_read(data, block_num, &block_tmp);
}
// Load Key B
// Key B mask 0b1111110000000000 = 0xfc00
if((block_unknown_bytes_mask & 0xfc00) == 0) {
uint64_t key = nfc_util_bytes2num(sec_tr_tmp->key_b, sizeof(sec_tr_tmp->key_b));
mf_classic_set_key_found(data, sector_num, MfClassicKeyB, key);
}
} else {
if(block_unknown_bytes_mask == 0) {
mf_classic_set_block_read(data, block_num, &block_tmp);
}
}
}
static bool nfc_device_load_mifare_classic_data(FlipperFormat* file, NfcDevice* dev) {
bool parsed = false;
MfClassicData* data = &dev->dev_data.mf_classic_data;
FuriString* temp_str;
uint32_t data_format_version = 0;
temp_str = furi_string_alloc();
uint16_t data_blocks = 0;
memset(data, 0, sizeof(MfClassicData));
do {
// Read Mifare Classic type
if(!flipper_format_read_string(file, "Mifare Classic type", temp_str)) break;
if(!furi_string_cmp(temp_str, "MINI")) {
data->type = MfClassicTypeMini;
data_blocks = 20;
} else if(!furi_string_cmp(temp_str, "1K")) {
data->type = MfClassicType1k;
data_blocks = 64;
} else if(!furi_string_cmp(temp_str, "4K")) {
data->type = MfClassicType4k;
data_blocks = 256;
} else {
break;
}
bool old_format = false;
// Read Mifare Classic format version
if(!flipper_format_read_uint32(file, "Data format version", &data_format_version, 1)) {
// Load unread sectors with zero keys access for backward compatibility
if(!flipper_format_rewind(file)) break;
old_format = true;
} else {
if(data_format_version < nfc_mifare_classic_data_format_version) {
old_format = true;
}
}
// Read Mifare Classic blocks
bool block_read = true;
FuriString* block_str;
block_str = furi_string_alloc();
for(size_t i = 0; i < data_blocks; i++) {
furi_string_printf(temp_str, "Block %d", i);
if(!flipper_format_read_string(file, furi_string_get_cstr(temp_str), block_str)) {
block_read = false;
break;
}
nfc_device_load_mifare_classic_block(block_str, data, i);
}
furi_string_free(block_str);
if(!block_read) break;
// Set keys and blocks as unknown for backward compatibility
if(old_format) {
data->key_a_mask = 0ULL;
data->key_b_mask = 0ULL;
memset(data->block_read_mask, 0, sizeof(data->block_read_mask));
}
parsed = true;
} while(false);
furi_string_free(temp_str);
return parsed;
}
static void nfc_device_get_key_cache_file_path(NfcDevice* dev, FuriString* file_path) {
uint8_t* uid = dev->dev_data.nfc_data.uid;
uint8_t uid_len = dev->dev_data.nfc_data.uid_len;
furi_string_set(file_path, NFC_DEVICE_KEYS_FOLDER "/");
for(size_t i = 0; i < uid_len; i++) {
furi_string_cat_printf(file_path, "%02X", uid[i]);
}
furi_string_cat_printf(file_path, NFC_DEVICE_KEYS_EXTENSION);
}
static bool nfc_device_save_mifare_classic_keys(NfcDevice* dev) {
FlipperFormat* file = flipper_format_file_alloc(dev->storage);
MfClassicData* data = &dev->dev_data.mf_classic_data;
FuriString* temp_str;
temp_str = furi_string_alloc();
nfc_device_get_key_cache_file_path(dev, temp_str);
bool save_success = false;
do {
if(!storage_simply_mkdir(dev->storage, NFC_DEVICE_KEYS_FOLDER)) break;
if(!storage_simply_remove(dev->storage, furi_string_get_cstr(temp_str))) break;
if(!flipper_format_file_open_always(file, furi_string_get_cstr(temp_str))) break;
if(!flipper_format_write_header_cstr(file, nfc_keys_file_header, nfc_keys_file_version))
break;
if(data->type == MfClassicTypeMini) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "MINI")) break;
} else if(data->type == MfClassicType1k) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "1K")) break;
} else if(data->type == MfClassicType4k) {
if(!flipper_format_write_string_cstr(file, "Mifare Classic type", "4K")) break;
}
if(!flipper_format_write_hex_uint64(file, "Key A map", &data->key_a_mask, 1)) break;
if(!flipper_format_write_hex_uint64(file, "Key B map", &data->key_b_mask, 1)) break;
uint8_t sector_num = mf_classic_get_total_sectors_num(data->type);
bool key_save_success = true;
for(size_t i = 0; (i < sector_num) && (key_save_success); i++) {
MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, i);
if(FURI_BIT(data->key_a_mask, i)) {
furi_string_printf(temp_str, "Key A sector %d", i);
key_save_success = flipper_format_write_hex(
file, furi_string_get_cstr(temp_str), sec_tr->key_a, 6);
}
if(!key_save_success) break;
if(FURI_BIT(data->key_b_mask, i)) {
furi_string_printf(temp_str, "Key B sector %d", i);
key_save_success = flipper_format_write_hex(
file, furi_string_get_cstr(temp_str), sec_tr->key_b, 6);
}
}
save_success = key_save_success;
} while(false);
flipper_format_free(file);
furi_string_free(temp_str);
return save_success;
}
bool nfc_device_load_key_cache(NfcDevice* dev) {
furi_assert(dev);
FuriString* temp_str;
temp_str = furi_string_alloc();
MfClassicData* data = &dev->dev_data.mf_classic_data;
nfc_device_get_key_cache_file_path(dev, temp_str);
FlipperFormat* file = flipper_format_file_alloc(dev->storage);
bool load_success = false;
do {
if(storage_common_stat(dev->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, nfc_keys_file_header)) break;
if(version != nfc_keys_file_version) break;
if(!flipper_format_read_string(file, "Mifare Classic type", temp_str)) break;
if(!furi_string_cmp(temp_str, "MINI")) {
data->type = MfClassicTypeMini;
} else if(!furi_string_cmp(temp_str, "1K")) {
data->type = MfClassicType1k;
} else if(!furi_string_cmp(temp_str, "4K")) {
data->type = MfClassicType4k;
} else {
break;
}
if(!flipper_format_read_hex_uint64(file, "Key A map", &data->key_a_mask, 1)) break;
if(!flipper_format_read_hex_uint64(file, "Key B map", &data->key_b_mask, 1)) break;
uint8_t sectors = mf_classic_get_total_sectors_num(data->type);
bool key_read_success = true;
for(size_t i = 0; (i < sectors) && (key_read_success); i++) {
MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, i);
if(FURI_BIT(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(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;
}
void nfc_device_set_name(NfcDevice* dev, const char* name) {
furi_assert(dev);
strlcpy(dev->dev_name, name, NFC_DEV_NAME_MAX_LEN);
}
static void nfc_device_get_path_without_ext(FuriString* orig_path, FuriString* shadow_path) {
// TODO: this won't work if there is ".nfc" anywhere in the path other than
// at the end
size_t ext_start = furi_string_search(orig_path, NFC_APP_EXTENSION);
furi_string_set_n(shadow_path, orig_path, 0, ext_start);
}
static void nfc_device_get_shadow_path(FuriString* orig_path, FuriString* shadow_path) {
nfc_device_get_path_without_ext(orig_path, shadow_path);
furi_string_cat_printf(shadow_path, "%s", NFC_APP_SHADOW_EXTENSION);
}
static void nfc_device_get_folder_from_path(FuriString* path, FuriString* folder) {
size_t last_slash = furi_string_search_rchar(path, '/');
if(last_slash == FURI_STRING_FAILURE) {
// No slashes in the path, treat the whole path as a folder
furi_string_set(folder, path);
} else {
furi_string_set_n(folder, path, 0, last_slash);
}
}
bool nfc_device_save(NfcDevice* dev, const char* dev_name) {
furi_assert(dev);
bool saved = false;
FlipperFormat* file = flipper_format_file_alloc(dev->storage);
FuriHalNfcDevData* data = &dev->dev_data.nfc_data;
FuriString* temp_str;
temp_str = furi_string_alloc();
do {
// Create directory if necessary
FuriString* folder = furi_string_alloc();
// Get folder from filename (filename is in the form of "folder/filename.nfc", so the folder is "folder/")
furi_string_set(temp_str, dev_name);
// Get folder from filename
nfc_device_get_folder_from_path(temp_str, folder);
FURI_LOG_I("Nfc", "Saving to folder %s", furi_string_get_cstr(folder));
if(!storage_simply_mkdir(dev->storage, furi_string_get_cstr(folder))) {
FURI_LOG_E("Nfc", "Failed to create folder %s", furi_string_get_cstr(folder));
break;
}
furi_string_free(folder);
// First remove nfc device file if it was saved
// Open file
if(!flipper_format_file_open_always(file, furi_string_get_cstr(temp_str))) break;
// Write header
if(!flipper_format_write_header_cstr(file, nfc_file_header, nfc_file_version)) break;
// Write nfc device type
if(!flipper_format_write_comment_cstr(
file, "Nfc device type can be UID, Mifare Ultralight, Mifare Classic or ISO15693"))
break;
nfc_device_prepare_format_string(dev, temp_str);
if(!flipper_format_write_string(file, "Device type", temp_str)) break;
// Write UID
if(!flipper_format_write_comment_cstr(file, "UID is common for all formats")) break;
if(!flipper_format_write_hex(file, "UID", data->uid, data->uid_len)) break;
if(dev->format != NfcDeviceSaveFormatNfcV) {
// Write ATQA, SAK
if(!flipper_format_write_comment_cstr(file, "ISO14443 specific fields")) break;
// Save ATQA in MSB order for correct companion apps display
uint8_t atqa[2] = {data->atqa[1], data->atqa[0]};
if(!flipper_format_write_hex(file, "ATQA", atqa, 2)) break;
if(!flipper_format_write_hex(file, "SAK", &data->sak, 1)) break;
}
// Save more data if necessary
if(dev->format == NfcDeviceSaveFormatMifareUl) {
if(!nfc_device_save_mifare_ul_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatMifareDesfire) {
if(!nfc_device_save_mifare_df_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatNfcV) {
if(!nfc_device_save_nfcv_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatBankCard) {
if(!nfc_device_save_bank_card_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatMifareClassic) {
// Save data
if(!nfc_device_save_mifare_classic_data(file, dev)) break;
// Save keys cache
if(!nfc_device_save_mifare_classic_keys(dev)) break;
}
saved = true;
} while(0);
if(!saved) { //-V547
dialog_message_show_storage_error(dev->dialogs, "Can not save\nkey file");
}
furi_string_free(temp_str);
flipper_format_free(file);
return saved;
}
bool nfc_device_save_shadow(NfcDevice* dev, const char* path) {
dev->shadow_file_exist = true;
// Replace extension from .nfc to .shd if necessary
FuriString* orig_path = furi_string_alloc();
furi_string_set_str(orig_path, path);
FuriString* shadow_path = furi_string_alloc();
nfc_device_get_shadow_path(orig_path, shadow_path);
bool file_saved = nfc_device_save(dev, furi_string_get_cstr(shadow_path));
furi_string_free(orig_path);
furi_string_free(shadow_path);
return file_saved;
}
static bool nfc_device_load_data(NfcDevice* dev, FuriString* path, bool show_dialog) {
bool parsed = false;
FlipperFormat* file = flipper_format_file_alloc(dev->storage);
FuriHalNfcDevData* data = &dev->dev_data.nfc_data;
uint32_t data_cnt = 0;
FuriString* temp_str;
temp_str = furi_string_alloc();
bool deprecated_version = false;
// Version 2 of file format had ATQA bytes swapped
uint32_t version_with_lsb_atqa = 2;
if(dev->loading_cb) {
dev->loading_cb(dev->loading_cb_ctx, true);
}
do {
// Check existence of shadow file
nfc_device_get_shadow_path(path, temp_str);
dev->shadow_file_exist =
storage_common_stat(dev->storage, furi_string_get_cstr(temp_str), NULL) == FSE_OK;
// Open shadow file if it exists. If not - open original
if(dev->shadow_file_exist) {
if(!flipper_format_file_open_existing(file, furi_string_get_cstr(temp_str))) break;
} else {
if(!flipper_format_file_open_existing(file, furi_string_get_cstr(path))) break;
}
// Read and verify file header
uint32_t version = 0;
if(!flipper_format_read_header(file, temp_str, &version)) break;
if(furi_string_cmp_str(temp_str, nfc_file_header)) break;
if(version != nfc_file_version) {
if(version < version_with_lsb_atqa) {
deprecated_version = true;
break;
}
}
// Read Nfc device type
if(!flipper_format_read_string(file, "Device type", temp_str)) break;
if(!nfc_device_parse_format_string(dev, temp_str)) break;
// Read and parse UID, ATQA and SAK
if(!flipper_format_get_value_count(file, "UID", &data_cnt)) break;
if(!(data_cnt == 4 || data_cnt == 7 || data_cnt == 8)) break;
data->uid_len = data_cnt;
if(!flipper_format_read_hex(file, "UID", data->uid, data->uid_len)) break;
if(dev->format != NfcDeviceSaveFormatNfcV) {
if(version == version_with_lsb_atqa) {
if(!flipper_format_read_hex(file, "ATQA", data->atqa, 2)) break;
} else {
uint8_t atqa[2] = {};
if(!flipper_format_read_hex(file, "ATQA", atqa, 2)) break;
data->atqa[0] = atqa[1];
data->atqa[1] = atqa[0];
}
if(!flipper_format_read_hex(file, "SAK", &data->sak, 1)) break;
}
// Load CUID
uint8_t* cuid_start = data->uid;
if(data->uid_len == 7) {
cuid_start = &data->uid[3];
}
data->cuid = (cuid_start[0] << 24) | (cuid_start[1] << 16) | (cuid_start[2] << 8) |
(cuid_start[3]);
// Parse other data
if(dev->format == NfcDeviceSaveFormatMifareUl) {
if(!nfc_device_load_mifare_ul_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatMifareClassic) {
if(!nfc_device_load_mifare_classic_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatMifareDesfire) {
if(!nfc_device_load_mifare_df_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatNfcV) {
if(!nfc_device_load_nfcv_data(file, dev)) break;
} else if(dev->format == NfcDeviceSaveFormatBankCard) {
if(!nfc_device_load_bank_card_data(file, dev)) break;
}
parsed = true;
} while(false);
if(dev->loading_cb) {
dev->loading_cb(dev->loading_cb_ctx, false);
}
if((!parsed) && (show_dialog)) {
if(deprecated_version) {
dialog_message_show_storage_error(dev->dialogs, "File format deprecated");
} else {
dialog_message_show_storage_error(dev->dialogs, "Can not parse\nfile");
}
}
furi_string_free(temp_str);
flipper_format_free(file);
return parsed;
}
bool nfc_device_load(NfcDevice* dev, const char* file_path, bool show_dialog) {
furi_assert(dev);
furi_assert(file_path);
// Load device data
furi_string_set(dev->load_path, file_path);
bool dev_load = nfc_device_load_data(dev, dev->load_path, show_dialog);
if(dev_load) {
// Set device name
FuriString* filename;
filename = furi_string_alloc();
path_extract_filename_no_ext(file_path, filename);
nfc_device_set_name(dev, furi_string_get_cstr(filename));
furi_string_free(filename);
}
return dev_load;
}
bool nfc_file_select(NfcDevice* dev) {
furi_assert(dev);
const char* folder = furi_string_get_cstr(dev->folder);
// Input events and views are managed by file_browser
const DialogsFileBrowserOptions browser_options = {
.extension = NFC_APP_EXTENSION,
.skip_assets = true,
.hide_dot_files = true,
.icon = &I_Nfc_10px,
.hide_ext = true,
.item_loader_callback = NULL,
.item_loader_context = NULL,
.base_path = folder,
};
bool res =
dialog_file_browser_show(dev->dialogs, dev->load_path, dev->load_path, &browser_options);
if(res) {
FuriString* filename;
filename = furi_string_alloc();
path_extract_filename(dev->load_path, filename, true);
strncpy(dev->dev_name, furi_string_get_cstr(filename), NFC_DEV_NAME_MAX_LEN);
res = nfc_device_load_data(dev, dev->load_path, true);
if(res) {
nfc_device_set_name(dev, dev->dev_name);
}
furi_string_free(filename);
}
return res;
}
void nfc_device_data_clear(NfcDeviceData* dev_data) {
if(dev_data->protocol == NfcDeviceProtocolMifareDesfire) {
mf_df_clear(&dev_data->mf_df_data);
} else if(dev_data->protocol == NfcDeviceProtocolMifareClassic) {
memset(&dev_data->mf_classic_data, 0, sizeof(MfClassicData));
} else if(dev_data->protocol == NfcDeviceProtocolMifareUl) {
mf_ul_reset(&dev_data->mf_ul_data);
} else if(dev_data->protocol == NfcDeviceProtocolEMV) {
memset(&dev_data->emv_data, 0, sizeof(EmvData));
}
memset(&dev_data->nfc_data, 0, sizeof(FuriHalNfcDevData));
dev_data->protocol = NfcDeviceProtocolUnknown;
furi_string_reset(dev_data->parsed_data);
}
void nfc_device_clear(NfcDevice* dev) {
furi_assert(dev);
nfc_device_set_name(dev, "");
nfc_device_data_clear(&dev->dev_data);
dev->format = NfcDeviceSaveFormatUid;
furi_string_reset(dev->load_path);
}
bool nfc_device_delete(NfcDevice* dev, bool use_load_path) {
furi_assert(dev);
bool deleted = false;
FuriString* file_path;
file_path = furi_string_alloc();
do {
// Delete original file
if(use_load_path && !furi_string_empty(dev->load_path)) {
furi_string_set(file_path, dev->load_path);
} else {
furi_string_printf(
file_path,
"%s/%s%s",
furi_string_get_cstr(dev->folder),
dev->dev_name,
NFC_APP_EXTENSION);
}
if(!storage_simply_remove(dev->storage, furi_string_get_cstr(file_path))) break;
// Delete shadow file if it exists
if(dev->shadow_file_exist) {
if(use_load_path && !furi_string_empty(dev->load_path)) {
nfc_device_get_shadow_path(dev->load_path, file_path);
} else {
furi_string_printf(
file_path,
"%s/%s%s",
furi_string_get_cstr(dev->folder),
dev->dev_name,
NFC_APP_SHADOW_EXTENSION);
}
if(!storage_simply_remove(dev->storage, furi_string_get_cstr(file_path))) break;
}
deleted = true;
} while(0);
if(!deleted) {
dialog_message_show_storage_error(dev->dialogs, "Can not remove file");
}
furi_string_free(file_path);
return deleted;
}
bool nfc_device_restore(NfcDevice* dev, bool use_load_path) {
furi_assert(dev);
furi_assert(dev->shadow_file_exist);
bool restored = false;
FuriString* path;
path = furi_string_alloc();
do {
if(use_load_path && !furi_string_empty(dev->load_path)) {
nfc_device_get_shadow_path(dev->load_path, path);
} else {
furi_string_printf(
path,
"%s/%s%s",
furi_string_get_cstr(dev->folder),
dev->dev_name,
NFC_APP_SHADOW_EXTENSION);
}
if(!storage_simply_remove(dev->storage, furi_string_get_cstr(path))) break;
dev->shadow_file_exist = false;
if(use_load_path && !furi_string_empty(dev->load_path)) {
furi_string_set(path, dev->load_path);
} else {
furi_string_printf(
path,
"%s/%s%s",
furi_string_get_cstr(dev->folder),
dev->dev_name,
NFC_APP_EXTENSION);
}
if(!nfc_device_load_data(dev, path, true)) break;
restored = true;
} while(0);
furi_string_free(path);
return restored;
}
void nfc_device_set_loading_callback(NfcDevice* dev, NfcLoadingCallback callback, void* context) {
furi_assert(dev);
dev->loading_cb = callback;
dev->loading_cb_ctx = context;
}
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