98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
#include "nfc_supported_card.h"
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#include <gui/modules/widget.h>
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#include <nfc_worker_i.h>
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#include <furi_hal.h>
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static const MfClassicAuthContext plantain_keys[] = {
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{.sector = 0, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 1, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 2, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 3, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 4, .key_a = 0xe56ac127dd45, .key_b = 0x19fc84a3784b},
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{.sector = 5, .key_a = 0x77dabc9825e1, .key_b = 0x9764fec3154a},
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{.sector = 6, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 7, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 8, .key_a = 0x26973ea74321, .key_b = 0xd27058c6e2c7},
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{.sector = 9, .key_a = 0xeb0a8ff88ade, .key_b = 0x578a9ada41e3},
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{.sector = 10, .key_a = 0xea0fd73cb149, .key_b = 0x29c35fa068fb},
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{.sector = 11, .key_a = 0xc76bf71a2509, .key_b = 0x9ba241db3f56},
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{.sector = 12, .key_a = 0xacffffffffff, .key_b = 0x71f3a315ad26},
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{.sector = 13, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 14, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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{.sector = 15, .key_a = 0xffffffffffff, .key_b = 0xffffffffffff},
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};
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bool plantain_parser_verify(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
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furi_assert(nfc_worker);
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UNUSED(nfc_worker);
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if(nfc_worker->dev_data->mf_classic_data.type != MfClassicType1k) {
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return false;
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}
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uint8_t sector = 8;
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uint8_t block = mf_classic_get_sector_trailer_block_num_by_sector(sector);
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FURI_LOG_D("Plant", "Verifying sector %d", sector);
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if(mf_classic_authenticate(tx_rx, block, 0x26973ea74321, MfClassicKeyA)) {
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FURI_LOG_D("Plant", "Sector %d verified", sector);
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return true;
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}
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return false;
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}
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bool plantain_parser_read(NfcWorker* nfc_worker, FuriHalNfcTxRxContext* tx_rx) {
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furi_assert(nfc_worker);
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MfClassicReader reader = {};
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FuriHalNfcDevData* nfc_data = &nfc_worker->dev_data->nfc_data;
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reader.type = mf_classic_get_classic_type(nfc_data->atqa[0], nfc_data->atqa[1], nfc_data->sak);
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for(size_t i = 0; i < COUNT_OF(plantain_keys); i++) {
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mf_classic_reader_add_sector(
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&reader, plantain_keys[i].sector, plantain_keys[i].key_a, plantain_keys[i].key_b);
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}
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return mf_classic_read_card(tx_rx, &reader, &nfc_worker->dev_data->mf_classic_data) == 16;
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}
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uint8_t plantain_calculate_luhn(uint64_t number) {
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// No.
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UNUSED(number);
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return 0;
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}
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bool plantain_parser_parse(NfcDeviceData* dev_data) {
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MfClassicData* data = &dev_data->mf_classic_data;
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// Verify key
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MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, 8);
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uint64_t key = nfc_util_bytes2num(sec_tr->key_a, 6);
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if(key != plantain_keys[8].key_a) return false;
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// Point to block 0 of sector 4, value 0
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uint8_t* temp_ptr = &data->block[4 * 4].value[0];
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// Read first 4 bytes of block 0 of sector 4 from last to first and convert them to uint32_t
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// 38 18 00 00 becomes 00 00 18 38, and equals to 6200 decimal
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uint32_t balance =
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((temp_ptr[3] << 24) | (temp_ptr[2] << 16) | (temp_ptr[1] << 8) | temp_ptr[0]) / 100;
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// Read card number
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// Point to block 0 of sector 0, value 0
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temp_ptr = &data->block[0 * 4].value[0];
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// Read first 7 bytes of block 0 of sector 0 from last to first and convert them to uint64_t
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// 04 31 16 8A 23 5C 80 becomes 80 5C 23 8A 16 31 04, and equals to 36130104729284868 decimal
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uint8_t card_number_arr[7];
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for(size_t i = 0; i < 7; i++) {
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card_number_arr[i] = temp_ptr[6 - i];
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}
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// Copy card number to uint64_t
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uint64_t card_number = 0;
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for(size_t i = 0; i < 7; i++) {
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card_number = (card_number << 8) | card_number_arr[i];
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}
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furi_string_printf(
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dev_data->parsed_data, "\e#Plantain\nN:%llu-\nBalance:%lu\n", card_number, balance);
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return true;
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}
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