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Plantain parser improvements (#3469)
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* Refactored card nubmer and balance
* Podorozhnik refactor
* Balance fix and BSK card support added

Co-authored-by: あく <[email protected]>
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@assasinfil @skotopes
assasinfil and skotopes authored Oct 6, 2024
1 parent 6ead328 commit c3dc0ae
Showing 1 changed file with 93 additions and 19 deletions.
112 changes: 93 additions & 19 deletions applications/main/nfc/plugins/supported_cards/plantain.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4,10 +4,21 @@

#include <nfc/nfc_device.h>
#include <bit_lib/bit_lib.h>
#include <datetime.h>
#include <nfc/protocols/mf_classic/mf_classic_poller_sync.h>

#define TAG "Plantain"

void from_minutes_to_datetime(uint32_t minutes, DateTime* datetime, uint16_t start_year) {
uint32_t timestamp = minutes * 60;
DateTime start_datetime = {0};
start_datetime.year = start_year - 1;
start_datetime.month = 12;
start_datetime.day = 31;
timestamp += datetime_datetime_to_timestamp(&start_datetime);
datetime_timestamp_to_datetime(timestamp, datetime);
}

typedef struct {
uint64_t a;
uint64_t b;
Expand Down Expand Up @@ -208,29 +219,92 @@ static bool plantain_parse(const NfcDevice* device, FuriString* parsed_data) {
bit_lib_bytes_to_num_be(sec_tr->key_a.data, COUNT_OF(sec_tr->key_a.data));
if(key != cfg.keys[cfg.data_sector].a) break;

// 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
furi_string_printf(parsed_data, "\e#Plantain card\n");
uint64_t card_number = 0;
for(size_t i = 0; i < 7; i++) {
card_number = (card_number << 8) | card_number_arr[i];
card_number = (card_number << 8) | data->block[0].data[6 - i];
}

furi_string_printf(
parsed_data, "\e#Plantain\nNo.: %lluX\nBalance: %lu\n", card_number, balance);
// Print card number with 4-digit groups
furi_string_cat_printf(parsed_data, "Number: ");
FuriString* card_number_s = furi_string_alloc();
furi_string_cat_printf(card_number_s, "%lld", card_number);
FuriString* tmp_s = furi_string_alloc_set_str("9643 3078 ");
for(uint8_t i = 0; i < 24; i += 4) {
for(uint8_t j = 0; j < 4; j++) {
furi_string_push_back(tmp_s, furi_string_get_char(card_number_s, i + j));
}
furi_string_push_back(tmp_s, ' ');
}
furi_string_cat_printf(parsed_data, "%s\n", furi_string_get_cstr(tmp_s));
if(data->type == MfClassicType1k) {
//balance
uint32_t balance = 0;
for(uint8_t i = 0; i < 4; i++) {
balance = (balance << 8) | data->block[16].data[3 - i];
}
furi_string_cat_printf(parsed_data, "Balance: %ld rub\n", balance / 100);

//trips
uint8_t trips_metro = data->block[21].data[0];
uint8_t trips_ground = data->block[21].data[1];
furi_string_cat_printf(parsed_data, "Trips: %d\n", trips_metro + trips_ground);
//trip time
uint32_t last_trip_timestamp = 0;
for(uint8_t i = 0; i < 3; i++) {
last_trip_timestamp = (last_trip_timestamp << 8) | data->block[21].data[4 - i];
}
DateTime last_trip = {0};
from_minutes_to_datetime(last_trip_timestamp + 24 * 60, &last_trip, 2010);
furi_string_cat_printf(
parsed_data,
"Trip start: %02d.%02d.%04d %02d:%02d\n",
last_trip.day,
last_trip.month,
last_trip.year,
last_trip.hour,
last_trip.minute);
//validator
uint16_t validator = (data->block[20].data[5] << 8) | data->block[20].data[4];
furi_string_cat_printf(parsed_data, "Validator: %d\n", validator);
//tariff
uint16_t fare = (data->block[20].data[7] << 8) | data->block[20].data[6];
furi_string_cat_printf(parsed_data, "Tariff: %d rub\n", fare / 100);
//trips in metro
furi_string_cat_printf(parsed_data, "Trips (Metro): %d\n", trips_metro);
//trips on ground
furi_string_cat_printf(parsed_data, "Trips (Ground): %d\n", trips_ground);
//last payment
uint32_t last_payment_timestamp = 0;
for(uint8_t i = 0; i < 3; i++) {
last_payment_timestamp = (last_payment_timestamp << 8) |
data->block[18].data[4 - i];
}
DateTime last_payment_date = {0};
from_minutes_to_datetime(last_payment_timestamp + 24 * 60, &last_payment_date, 2010);
furi_string_cat_printf(
parsed_data,
"Last pay: %02d.%02d.%04d %02d:%02d\n",
last_payment_date.day,
last_payment_date.month,
last_payment_date.year,
last_payment_date.hour,
last_payment_date.minute);
//payment summ
uint16_t last_payment = (data->block[18].data[9] << 8) | data->block[18].data[8];
furi_string_cat_printf(parsed_data, "Amount: %d rub", last_payment / 100);
furi_string_free(card_number_s);
furi_string_free(tmp_s);
} else if(data->type == MfClassicType4k) {
//trips
uint8_t trips_metro = data->block[36].data[0];
uint8_t trips_ground = data->block[36].data[1];
furi_string_cat_printf(parsed_data, "Trips: %d\n", trips_metro + trips_ground);
//trips in metro
furi_string_cat_printf(parsed_data, "Trips (Metro): %d\n", trips_metro);
//trips on ground
furi_string_cat_printf(parsed_data, "Trips (Ground): %d\n", trips_ground);
}
parsed = true;
} while(false);

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