#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 "Plantain" typedef struct { uint64_t a; uint64_t b; } MfClassicKeyPair; typedef struct { const MfClassicKeyPair* keys; uint32_t data_sector; } PlantainCardConfig; static const MfClassicKeyPair plantain_1k_keys[] = { {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xe56ac127dd45, .b = 0x19fc84a3784b}, {.a = 0x77dabc9825e1, .b = 0x9764fec3154a}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0x26973ea74321, .b = 0xd27058c6e2c7}, {.a = 0xeb0a8ff88ade, .b = 0x578a9ada41e3}, {.a = 0xea0fd73cb149, .b = 0x29c35fa068fb}, {.a = 0xc76bf71a2509, .b = 0x9ba241db3f56}, {.a = 0xacffffffffff, .b = 0x71f3a315ad26}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, }; static const MfClassicKeyPair plantain_4k_keys[] = { {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xe56ac127dd45, .b = 0x19fc84a3784b}, {.a = 0x77dabc9825e1, .b = 0x9764fec3154a}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0x26973ea74321, .b = 0xd27058c6e2c7}, {.a = 0xeb0a8ff88ade, .b = 0x578a9ada41e3}, {.a = 0xea0fd73cb149, .b = 0x29c35fa068fb}, {.a = 0xc76bf71a2509, .b = 0x9ba241db3f56}, {.a = 0xacffffffffff, .b = 0x71f3a315ad26}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.a = 0xffffffffffff, .b = 0xffffffffffff}, {.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 = 0x0eb23cc8110b, .b = 0x04dc35277635}, {.a = 0xbc4580b7f20b, .b = 0xd0a4131fb290}, {.a = 0x7a396f0d633d, .b = 0xad2bdc097023}, {.a = 0xa3faa6daff67, .b = 0x7600e889adf9}, {.a = 0xfd8705e721b0, .b = 0x296fc317a513}, {.a = 0x22052b480d11, .b = 0xe19504c39461}, {.a = 0xa7141147d430, .b = 0xff16014fefc7}, {.a = 0x8a8d88151a00, .b = 0x038b5f9b5a2a}, {.a = 0xb27addfb64b0, .b = 0x152fd0c420a7}, {.a = 0x7259fa0197c6, .b = 0x5583698df085}, }; static bool plantain_get_card_config(PlantainCardConfig* config, MfClassicType type) { bool success = true; if(type == MfClassicType1k) { config->data_sector = 8; config->keys = plantain_1k_keys; } else if(type == MfClassicType4k) { config->data_sector = 8; config->keys = plantain_4k_keys; } else { success = false; } return success; } static bool plantain_verify_type(Nfc* nfc, MfClassicType type) { bool verified = false; do { PlantainCardConfig cfg = {}; if(!plantain_get_card_config(&cfg, type)) break; const uint8_t block_num = mf_classic_get_first_block_num_of_sector(cfg.data_sector); FURI_LOG_D(TAG, "Verifying sector %lu", cfg.data_sector); MfClassicKey key = {0}; nfc_util_num2bytes(cfg.keys[cfg.data_sector].a, COUNT_OF(key.data), key.data); MfClassicAuthContext auth_context; MfClassicError error = mf_classic_poller_sync_auth(nfc, block_num, &key, MfClassicKeyTypeA, &auth_context); 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 plantain_verify(Nfc* nfc) { return plantain_verify_type(nfc, MfClassicType1k) || plantain_verify_type(nfc, MfClassicType4k); } static bool plantain_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; PlantainCardConfig cfg = {}; if(!plantain_get_card_config(&cfg, data->type)) break; MfClassicDeviceKeys keys = {}; for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) { nfc_util_num2bytes(cfg.keys[i].a, sizeof(MfClassicKey), keys.key_a[i].data); FURI_BIT_SET(keys.key_a_mask, i); nfc_util_num2bytes(cfg.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 plantain_parse(const NfcDevice* device, FuriString* parsed_data) { furi_assert(device); const MfClassicData* data = nfc_device_get_data(device, NfcProtocolMfClassic); bool parsed = false; do { // Verify card type PlantainCardConfig cfg = {}; if(!plantain_get_card_config(&cfg, data->type)) break; // Verify key const MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, cfg.data_sector); const uint64_t key = nfc_util_bytes2num(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 uint64_t card_number = 0; for(size_t i = 0; i < 7; i++) { card_number = (card_number << 8) | card_number_arr[i]; } furi_string_printf( parsed_data, "\e#Plantain\nN:%llu-\nBalance:%lu\n", card_number, balance); parsed = true; } while(false); return parsed; } /* Actual implementation of app<>plugin interface */ static const NfcSupportedCardsPlugin plantain_plugin = { .protocol = NfcProtocolMfClassic, .verify = plantain_verify, .read = plantain_read, .parse = plantain_parse, }; /* Plugin descriptor to comply with basic plugin specification */ static const FlipperAppPluginDescriptor plantain_plugin_descriptor = { .appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID, .ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION, .entry_point = &plantain_plugin, }; /* Plugin entry point - must return a pointer to const descriptor */ const FlipperAppPluginDescriptor* plantain_plugin_ep() { return &plantain_plugin_descriptor; }