unleashed-firmware/applications/main/nfc/plugins/supported_cards/two_cities.c

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#include "nfc_supported_card_plugin.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>
#define TAG "TwoCities"
typedef struct {
uint64_t a;
uint64_t b;
} MfClassicKeyPair;
static const MfClassicKeyPair two_cities_4k_keys[] = {
{.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff},
{.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99}, {.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99},
{.a = 0xe56ac127dd45, .b = 0x19fc84a3784b}, {.a = 0x77dabc9825e1, .b = 0x9764fec3154a},
{.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99}, {.a = 0xffffffffffff, .b = 0xffffffffffff},
{.a = 0xa73f5dc1d333, .b = 0xe35173494a81}, {.a = 0x69a32f1c2f19, .b = 0x6b8bd9860763},
{.a = 0xea0fd73cb149, .b = 0x29c35fa068fb}, {.a = 0xc76bf71a2509, .b = 0x9ba241db3f56},
{.a = 0xacffffffffff, .b = 0x71f3a315ad26}, {.a = 0xffffffffffff, .b = 0xffffffffffff},
{.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99},
{.a = 0x72f96bdd3714, .b = 0x462225cd34cf}, {.a = 0x044ce1872bc3, .b = 0x8c90c70cff4a},
{.a = 0xbc2d1791dec1, .b = 0xca96a487de0b}, {.a = 0x8791b2ccb5c4, .b = 0xc956c3b80da3},
{.a = 0x8e26e45e7d65, .b = 0x8e65b3af7d22}, {.a = 0x0f318130ed18, .b = 0x0c420a20e056},
{.a = 0x045ceca15535, .b = 0x31bec3d9e510}, {.a = 0x9d993c5d4ef4, .b = 0x86120e488abf},
{.a = 0xc65d4eaa645b, .b = 0xb69d40d1a439}, {.a = 0x3a8a139c20b4, .b = 0x8818a9c5d406},
{.a = 0xbaff3053b496, .b = 0x4b7cb25354d3}, {.a = 0x7413b599c4ea, .b = 0xb0a2AAF3A1BA},
{.a = 0x0ce7cd2cc72b, .b = 0xfa1fbb3f0f1f}, {.a = 0x0be5fac8b06a, .b = 0x6f95887a4fd3},
{.a = 0x26973ea74321, .b = 0xd27058c6e2c7}, {.a = 0xeb0a8ff88ade, .b = 0x578a9ada41e3},
{.a = 0x7a396f0d633d, .b = 0xad2bdc097023}, {.a = 0xa3faa6daff67, .b = 0x7600e889adf9},
{.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99}, {.a = 0x2aa05ed1856f, .b = 0xeaac88e5dc99},
{.a = 0xa7141147d430, .b = 0xff16014fefc7}, {.a = 0x8a8d88151a00, .b = 0x038b5f9b5a2a},
{.a = 0xb27addfb64b0, .b = 0x152fd0c420a7}, {.a = 0x7259fa0197c6, .b = 0x5583698df085},
};
bool two_cities_verify(Nfc* nfc) {
bool verified = false;
do {
const uint8_t verify_sector = 4;
uint8_t block_num = mf_classic_get_first_block_num_of_sector(verify_sector);
FURI_LOG_D(TAG, "Verifying sector %u", verify_sector);
MfClassicKey key = {};
nfc_util_num2bytes(two_cities_4k_keys[verify_sector].a, COUNT_OF(key.data), key.data);
MfClassicAuthContext auth_ctx = {};
MfClassicError error =
mf_classic_poller_sync_auth(nfc, block_num, &key, MfClassicKeyTypeA, &auth_ctx);
if(error != MfClassicErrorNone) {
FURI_LOG_D(TAG, "Failed to read block %u: %d", block_num, error);
break;
}
verified = true;
} while(false);
return verified;
}
static bool two_cities_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;
MfClassicDeviceKeys keys = {};
for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) {
nfc_util_num2bytes(two_cities_4k_keys[i].a, sizeof(MfClassicKey), keys.key_a[i].data);
FURI_BIT_SET(keys.key_a_mask, i);
nfc_util_num2bytes(two_cities_4k_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 = mf_classic_is_card_read(data);
} while(false);
mf_classic_free(data);
return is_read;
}
static bool two_cities_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
MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, 4);
uint64_t key = nfc_util_bytes2num(sec_tr->key_a.data, 6);
if(key != two_cities_4k_keys[4].a) return false;
// =====
// PLANTAIN
// =====
// Point to block 0 of sector 4, value 0
const uint8_t* temp_ptr = data->block[16].data;
// Read first 4 bytes of block 0 of sector 4 from last to first and convert them to uint32_t
// 38 18 00 00 becomes 00 00 18 38, and equals to 6200 decimal
uint32_t balance =
((temp_ptr[3] << 24) | (temp_ptr[2] << 16) | (temp_ptr[1] << 8) | temp_ptr[0]) / 100;
// Read card number
// Point to block 0 of sector 0, value 0
temp_ptr = data->block[0].data;
// Read first 7 bytes of block 0 of sector 0 from last to first and convert them to uint64_t
// 04 31 16 8A 23 5C 80 becomes 80 5C 23 8A 16 31 04, and equals to 36130104729284868 decimal
uint8_t card_number_arr[7];
for(size_t i = 0; i < 7; i++) {
card_number_arr[i] = temp_ptr[6 - i];
}
// Copy card number to uint64_t
uint64_t card_number = 0;
for(size_t i = 0; i < 7; i++) {
card_number = (card_number << 8) | card_number_arr[i];
}
// =====
// --PLANTAIN--
// =====
// TROIKA
// =====
const uint8_t* troika_temp_ptr = &data->block[33].data[5];
uint16_t troika_balance = ((troika_temp_ptr[0] << 8) | troika_temp_ptr[1]) / 25;
troika_temp_ptr = &data->block[32].data[2];
uint32_t troika_number = 0;
for(size_t i = 0; i < 4; i++) {
troika_number <<= 8;
troika_number |= troika_temp_ptr[i];
}
troika_number >>= 4;
furi_string_printf(
parsed_data,
"\e#Troika+Plantain\nPN: %llu-\nPB: %lu rur.\nTN: %lu\nTB: %u rur.\n",
card_number,
balance,
troika_number,
troika_balance);
parsed = true;
} while(false);
return parsed;
}
/* Actual implementation of app<>plugin interface */
static const NfcSupportedCardsPlugin two_cities_plugin = {
.protocol = NfcProtocolMfClassic,
.verify = two_cities_verify,
.read = two_cities_read,
.parse = two_cities_parse,
};
/* Plugin descriptor to comply with basic plugin specification */
static const FlipperAppPluginDescriptor two_cities_plugin_descriptor = {
.appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID,
.ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION,
.entry_point = &two_cities_plugin,
};
/* Plugin entry point - must return a pointer to const descriptor */
const FlipperAppPluginDescriptor* two_cities_plugin_ep() {
return &two_cities_plugin_descriptor;
}