unleashed-firmware/applications/main/nfc/plugins/supported_cards/metromoney.c
2023-12-16 23:57:46 +09:00

190 lines
6.2 KiB
C

/*
* Parser for Metromoney card (Georgia).
*
* Copyright 2023 Leptoptilos <leptoptilos@icloud.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nfc_supported_card_plugin.h"
#include "protocols/mf_classic/mf_classic.h"
#include <flipper_application/flipper_application.h>
#include <nfc/nfc_device.h>
#include <nfc/helpers/nfc_util.h>
#include <nfc/protocols/mf_classic/mf_classic_poller_sync.h>
#include <stdint.h>
#define TAG "Metromoney"
typedef struct {
uint64_t a;
uint64_t b;
} MfClassicKeyPair;
static const MfClassicKeyPair metromoney_1k_keys[] = {
{.a = 0x2803BCB0C7E1, .b = 0x4FA9EB49F75E},
{.a = 0x9C616585E26D, .b = 0xD1C71E590D16},
{.a = 0x9C616585E26D, .b = 0xA160FCD5EC4C},
{.a = 0x9C616585E26D, .b = 0xA160FCD5EC4C},
{.a = 0x9C616585E26D, .b = 0xA160FCD5EC4C},
{.a = 0x9C616585E26D, .b = 0xA160FCD5EC4C},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0x112233445566, .b = 0x361A62F35BC9},
{.a = 0x112233445566, .b = 0x361A62F35BC9},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
{.a = 0xFFFFFFFFFFFF, .b = 0xFFFFFFFFFFFF},
};
static bool metromoney_verify(Nfc* nfc) {
bool verified = false;
do {
const uint8_t ticket_sector_number = 1;
const uint8_t ticket_block_number =
mf_classic_get_first_block_num_of_sector(ticket_sector_number) + 1;
FURI_LOG_D(TAG, "Verifying sector %u", ticket_sector_number);
MfClassicKey key = {0};
nfc_util_num2bytes(
metromoney_1k_keys[ticket_sector_number].a, COUNT_OF(key.data), key.data);
MfClassicAuthContext auth_context;
MfClassicError error = mf_classic_poller_sync_auth(
nfc, ticket_block_number, &key, MfClassicKeyTypeA, &auth_context);
if(error != MfClassicErrorNone) {
FURI_LOG_D(TAG, "Failed to read block %u: %d", ticket_block_number, error);
break;
}
verified = true;
} while(false);
return verified;
}
static bool metromoney_read(Nfc* nfc, NfcDevice* device) {
furi_assert(nfc);
furi_assert(device);
bool is_read = false;
MfClassicData* data = mf_classic_alloc();
nfc_device_copy_data(device, NfcProtocolMfClassic, data);
do {
MfClassicType type = MfClassicTypeMini;
MfClassicError error = mf_classic_poller_sync_detect_type(nfc, &type);
if(error != MfClassicErrorNone) break;
data->type = type;
if(type != MfClassicType1k) break;
MfClassicDeviceKeys keys = {
.key_a_mask = 0,
.key_b_mask = 0,
};
for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) {
nfc_util_num2bytes(metromoney_1k_keys[i].a, sizeof(MfClassicKey), keys.key_a[i].data);
FURI_BIT_SET(keys.key_a_mask, i);
nfc_util_num2bytes(metromoney_1k_keys[i].b, sizeof(MfClassicKey), keys.key_b[i].data);
FURI_BIT_SET(keys.key_b_mask, i);
}
error = mf_classic_poller_sync_read(nfc, &keys, data);
if(error != MfClassicErrorNone) {
FURI_LOG_W(TAG, "Failed to read data");
break;
}
nfc_device_set_data(device, NfcProtocolMfClassic, data);
is_read = true;
} while(false);
mf_classic_free(data);
return is_read;
}
static bool metromoney_parse(const NfcDevice* device, FuriString* parsed_data) {
furi_assert(device);
const MfClassicData* data = nfc_device_get_data(device, NfcProtocolMfClassic);
bool parsed = false;
do {
// Verify key
const uint8_t ticket_sector_number = 1;
const uint8_t ticket_block_number = 1;
const MfClassicSectorTrailer* sec_tr =
mf_classic_get_sector_trailer_by_sector(data, ticket_sector_number);
const uint64_t key = nfc_util_bytes2num(sec_tr->key_a.data, COUNT_OF(sec_tr->key_a.data));
if(key != metromoney_1k_keys[ticket_sector_number].a) break;
// Parse data
const uint8_t start_block_num =
mf_classic_get_first_block_num_of_sector(ticket_sector_number);
const uint8_t* block_start_ptr =
&data->block[start_block_num + ticket_block_number].data[0];
uint32_t balance = nfc_util_bytes2num_little_endian(block_start_ptr, 4);
uint32_t balance_lari = balance / 100;
uint8_t balance_tetri = balance % 100;
size_t uid_len = 0;
const uint8_t* uid = mf_classic_get_uid(data, &uid_len);
uint32_t card_number = nfc_util_bytes2num_little_endian(uid, 4);
furi_string_printf(
parsed_data,
"\e#Metromoney\nCard number: %lu\nBalance: %lu.%02u GEL",
card_number,
balance_lari,
balance_tetri);
parsed = true;
} while(false);
return parsed;
}
/* Actual implementation of app<>plugin interface */
static const NfcSupportedCardsPlugin metromoney_plugin = {
.protocol = NfcProtocolMfClassic,
.verify = metromoney_verify,
.read = metromoney_read,
.parse = metromoney_parse,
};
/* Plugin descriptor to comply with basic plugin specification */
static const FlipperAppPluginDescriptor metromoney_plugin_descriptor = {
.appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID,
.ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION,
.entry_point = &metromoney_plugin,
};
/* Plugin entry point - must return a pointer to const descriptor */
const FlipperAppPluginDescriptor* metromoney_plugin_ep() {
return &metromoney_plugin_descriptor;
}