mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-24 05:23:06 +00:00
156 lines
6.2 KiB
C
156 lines
6.2 KiB
C
/*
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* Parser for Umarsh card (Russia).
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*
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* Copyright 2023 Leptoptilos <leptoptilos@icloud.com>
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* Thanks https://github.com/krolchonok for the provided dumps and their analysis
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*
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* Note: All meaningful data is stored in sectors 0, 8 and 12, reading data
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* from which is possible only with the B key. The key B for these sectors
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* is unique for each card. To get it, you should use a nested attack.
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* More info about Umarsh cards: https://github.com/metrodroid/metrodroid/wiki/Umarsh
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "nfc_supported_card_plugin.h"
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#include <flipper_application.h>
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#include "protocols/mf_classic/mf_classic.h"
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#include <bit_lib.h>
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#include <datetime.h>
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#include <locale/locale.h>
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#define TAG "Umarsh"
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bool parse_datetime(uint16_t date, DateTime* result) {
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result->year = 2000 + (date >> 9);
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result->month = date >> 5 & 0x0F;
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result->day = date & 0x1F;
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return date != 0;
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}
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static bool umarsh_parse(const NfcDevice* device, FuriString* parsed_data) {
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furi_assert(device);
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const MfClassicData* data = nfc_device_get_data(device, NfcProtocolMfClassic);
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bool parsed = false;
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do {
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// Verify card type
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if(data->type != MfClassicType1k) break;
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const uint8_t ticket_sector = 8;
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const uint8_t ticket_sector_start_block_number =
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mf_classic_get_first_block_num_of_sector(ticket_sector);
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// Validate specific for Umarsh ticket sector header
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const uint8_t* block_start_ptr = &data->block[ticket_sector_start_block_number].data[0];
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const uint32_t header_part_0 = bit_lib_bytes_to_num_be(block_start_ptr, 4);
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const uint32_t header_part_1 = bit_lib_bytes_to_num_be(block_start_ptr + 4, 4);
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if((header_part_0 + header_part_1) != 0xFFFFFFFF) break;
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// Data parsing from block 1
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block_start_ptr = &data->block[ticket_sector_start_block_number + 1].data[0];
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const uint16_t expiry_date = bit_lib_bytes_to_num_be(block_start_ptr + 1, 2);
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const uint8_t region_number = (((block_start_ptr[8] >> 5) & 0x07) << 4) |
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(block_start_ptr[12] & 0x0F);
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const uint8_t refill_counter = bit_lib_bytes_to_num_be(block_start_ptr + 7, 1);
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const uint32_t card_number = bit_lib_bytes_to_num_be(block_start_ptr + 8, 4) & 0x3FFFFFFF;
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if(card_number == 0) break;
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// Data parsing from block 2
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block_start_ptr = &data->block[ticket_sector_start_block_number + 2].data[0];
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const uint16_t valid_to = bit_lib_bytes_to_num_be(block_start_ptr, 2);
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const uint32_t terminal_number = bit_lib_bytes_to_num_be(block_start_ptr + 3, 3);
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const uint16_t last_refill_date = bit_lib_bytes_to_num_be(block_start_ptr + 6, 2);
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const uint16_t balance_rub = (bit_lib_bytes_to_num_be(block_start_ptr + 8, 2)) & 0x7FFF;
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const uint8_t balance_kop = bit_lib_bytes_to_num_be(block_start_ptr + 10, 1) & 0x7F;
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DateTime expiry_datetime;
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bool is_expiry_datetime_valid = parse_datetime(expiry_date, &expiry_datetime);
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DateTime valid_to_datetime;
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bool is_valid_to_datetime_valid = parse_datetime(valid_to, &valid_to_datetime);
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DateTime last_refill_datetime;
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bool is_last_refill_datetime_valid =
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parse_datetime(last_refill_date, &last_refill_datetime);
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LocaleDateFormat date_format = locale_get_date_format();
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const char* separator = (date_format == LocaleDateFormatDMY) ? "." : "/";
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FuriString* expiry_datetime_str = furi_string_alloc();
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locale_format_date(expiry_datetime_str, &expiry_datetime, date_format, separator);
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FuriString* valid_to_datetime_str = furi_string_alloc();
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locale_format_date(valid_to_datetime_str, &valid_to_datetime, date_format, separator);
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FuriString* last_refill_datetime_str = furi_string_alloc();
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locale_format_date(
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last_refill_datetime_str, &last_refill_datetime, date_format, separator);
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furi_string_cat_printf(
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parsed_data,
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"\e#Umarsh\nCard number: %lu\nRegion: %02u\nTerminal number: %lu\nRefill counter: %u\nBalance: %u.%02u RUR",
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card_number,
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region_number,
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terminal_number,
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refill_counter,
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balance_rub,
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balance_kop);
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if(is_expiry_datetime_valid)
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furi_string_cat_printf(
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parsed_data, "\nExpires: %s", furi_string_get_cstr(expiry_datetime_str));
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if(is_valid_to_datetime_valid)
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furi_string_cat_printf(
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parsed_data, "\nValid to: %s", furi_string_get_cstr(valid_to_datetime_str));
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if(is_last_refill_datetime_valid)
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furi_string_cat_printf(
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parsed_data, "\nLast refill: %s", furi_string_get_cstr(last_refill_datetime_str));
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furi_string_free(expiry_datetime_str);
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furi_string_free(valid_to_datetime_str);
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furi_string_free(last_refill_datetime_str);
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parsed = true;
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} while(false);
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return parsed;
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}
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/* Actual implementation of app<>plugin interface */
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static const NfcSupportedCardsPlugin umarsh_plugin = {
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.protocol = NfcProtocolMfClassic,
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.verify = NULL,
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.read = NULL,
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.parse = umarsh_parse,
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};
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/* Plugin descriptor to comply with basic plugin specification */
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static const FlipperAppPluginDescriptor umarsh_plugin_descriptor = {
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.appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID,
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.ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION,
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.entry_point = &umarsh_plugin,
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};
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/* Plugin entry point - must return a pointer to const descriptor */
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const FlipperAppPluginDescriptor* umarsh_plugin_ep(void) {
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return &umarsh_plugin_descriptor;
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}
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