[FL-2883] NFC: bank card rework reading (#1858)
* nfc: remove bank card save option * nfc: remove bank card save from nfc device * nfc: remove unused function in emv * nfc: try several times to start emv application * nfc: add AID display fallback for bank cards Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
@@ -636,35 +636,7 @@ bool nfc_device_load_mifare_df_data(FlipperFormat* file, NfcDevice* dev) {
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return parsed;
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}
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static bool nfc_device_save_bank_card_data(FlipperFormat* file, NfcDevice* dev) {
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bool saved = false;
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EmvData* data = &dev->dev_data.emv_data;
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uint32_t data_temp = 0;
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do {
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// Write Bank card specific data
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if(!flipper_format_write_comment_cstr(file, "Bank card specific data")) break;
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if(!flipper_format_write_hex(file, "AID", data->aid, data->aid_len)) break;
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if(!flipper_format_write_string_cstr(file, "Name", data->name)) break;
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if(!flipper_format_write_hex(file, "Number", data->number, data->number_len)) break;
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if(data->exp_mon) {
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uint8_t exp_data[2] = {data->exp_mon, data->exp_year};
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if(!flipper_format_write_hex(file, "Exp data", exp_data, sizeof(exp_data))) break;
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}
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if(data->country_code) {
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data_temp = data->country_code;
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if(!flipper_format_write_uint32(file, "Country code", &data_temp, 1)) break;
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}
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if(data->currency_code) {
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data_temp = data->currency_code;
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if(!flipper_format_write_uint32(file, "Currency code", &data_temp, 1)) break;
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}
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saved = true;
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} while(false);
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return saved;
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}
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// Leave for backward compatibility
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bool nfc_device_load_bank_card_data(FlipperFormat* file, NfcDevice* dev) {
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bool parsed = false;
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EmvData* data = &dev->dev_data.emv_data;
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@@ -1068,7 +1040,7 @@ static bool nfc_device_save_file(
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if(!flipper_format_write_header_cstr(file, nfc_file_header, nfc_file_version)) break;
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// Write nfc device type
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if(!flipper_format_write_comment_cstr(
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file, "Nfc device type can be UID, Mifare Ultralight, Mifare Classic, Bank card"))
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file, "Nfc device type can be UID, Mifare Ultralight, Mifare Classic"))
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break;
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nfc_device_prepare_format_string(dev, temp_str);
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if(!flipper_format_write_string(file, "Device type", temp_str)) break;
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@@ -1083,8 +1055,6 @@ static bool nfc_device_save_file(
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if(!nfc_device_save_mifare_ul_data(file, dev)) break;
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} else if(dev->format == NfcDeviceSaveFormatMifareDesfire) {
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if(!nfc_device_save_mifare_df_data(file, dev)) break;
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} else if(dev->format == NfcDeviceSaveFormatBankCard) {
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if(!nfc_device_save_bank_card_data(file, dev)) break;
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} else if(dev->format == NfcDeviceSaveFormatMifareClassic) {
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// Save data
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if(!nfc_device_save_mifare_classic_data(file, dev)) break;
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@@ -233,31 +233,51 @@ static bool nfc_worker_read_bank_card(NfcWorker* nfc_worker, FuriHalNfcTxRxConte
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reader_analyzer_start(nfc_worker->reader_analyzer, ReaderAnalyzerModeDebugLog);
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}
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do {
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// Read card
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// Bank cards require strong field to start application. If we find AID, try at least several
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// times to start EMV application
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uint8_t start_application_attempts = 0;
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while(start_application_attempts < 3) {
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if(nfc_worker->state != NfcWorkerStateRead) break;
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start_application_attempts++;
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if(!furi_hal_nfc_detect(&nfc_worker->dev_data->nfc_data, 300)) break;
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if(!emv_read_bank_card(tx_rx, &emv_app)) break;
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// Copy data
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// TODO Set EmvData to reader or like in mifare ultralight!
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result->number_len = emv_app.card_number_len;
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memcpy(result->number, emv_app.card_number, result->number_len);
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if(emv_read_bank_card(tx_rx, &emv_app)) {
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FURI_LOG_D(TAG, "Bank card number read from %d attempt", start_application_attempts);
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break;
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} else if(emv_app.aid_len && !emv_app.app_started) {
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FURI_LOG_D(
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TAG,
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"AID found but failed to start EMV app from %d attempt",
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start_application_attempts);
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furi_hal_nfc_sleep();
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continue;
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} else {
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FURI_LOG_D(TAG, "Failed to find AID");
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break;
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}
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}
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// Copy data
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if(emv_app.aid_len) {
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result->aid_len = emv_app.aid_len;
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memcpy(result->aid, emv_app.aid, result->aid_len);
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if(emv_app.name_found) {
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memcpy(result->name, emv_app.name, sizeof(emv_app.name));
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}
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if(emv_app.exp_month) {
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result->exp_mon = emv_app.exp_month;
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result->exp_year = emv_app.exp_year;
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}
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if(emv_app.country_code) {
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result->country_code = emv_app.country_code;
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}
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if(emv_app.currency_code) {
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result->currency_code = emv_app.currency_code;
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}
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read_success = true;
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} while(false);
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}
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if(emv_app.card_number_len) {
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result->number_len = emv_app.card_number_len;
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memcpy(result->number, emv_app.card_number, result->number_len);
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}
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if(emv_app.name_found) {
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memcpy(result->name, emv_app.name, sizeof(emv_app.name));
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}
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if(emv_app.exp_month) {
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result->exp_mon = emv_app.exp_month;
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result->exp_year = emv_app.exp_year;
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}
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if(emv_app.country_code) {
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result->country_code = emv_app.country_code;
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}
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if(emv_app.currency_code) {
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result->currency_code = emv_app.currency_code;
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}
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if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
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reader_analyzer_stop(nfc_worker->reader_analyzer);
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@@ -182,7 +182,7 @@ static bool emv_decode_response(uint8_t* buff, uint16_t len, EmvApplication* app
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return success;
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}
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bool emv_select_ppse(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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static bool emv_select_ppse(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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bool app_aid_found = false;
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const uint8_t emv_select_ppse_cmd[] = {
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0x00, 0xA4, // SELECT ppse
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@@ -212,8 +212,8 @@ bool emv_select_ppse(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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return app_aid_found;
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}
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bool emv_select_app(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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bool select_app_success = false;
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static bool emv_select_app(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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app->app_started = false;
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const uint8_t emv_select_header[] = {
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0x00,
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0xA4, // SELECT application
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@@ -236,7 +236,7 @@ bool emv_select_app(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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if(furi_hal_nfc_tx_rx(tx_rx, 300)) {
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emv_trace(tx_rx, "Start application answer:");
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if(emv_decode_response(tx_rx->rx_data, tx_rx->rx_bits / 8, app)) {
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select_app_success = true;
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app->app_started = true;
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} else {
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FURI_LOG_E(TAG, "Failed to read PAN or PDOL");
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}
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@@ -244,7 +244,7 @@ bool emv_select_app(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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FURI_LOG_E(TAG, "Failed to start application");
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}
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return select_app_success;
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return app->app_started;
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}
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static uint16_t emv_prepare_pdol(APDU* dest, APDU* src) {
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@@ -367,14 +367,6 @@ static bool emv_read_files(FuriHalNfcTxRxContext* tx_rx, EmvApplication* app) {
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return card_num_read;
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}
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bool emv_search_application(FuriHalNfcTxRxContext* tx_rx, EmvApplication* emv_app) {
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furi_assert(tx_rx);
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furi_assert(emv_app);
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memset(emv_app, 0, sizeof(EmvApplication));
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return emv_select_ppse(tx_rx, emv_app);
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}
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bool emv_read_bank_card(FuriHalNfcTxRxContext* tx_rx, EmvApplication* emv_app) {
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furi_assert(tx_rx);
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furi_assert(emv_app);
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@@ -45,6 +45,7 @@ typedef struct {
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uint8_t priority;
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uint8_t aid[16];
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uint8_t aid_len;
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bool app_started;
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char name[32];
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bool name_found;
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uint8_t card_number[10];
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@@ -68,15 +69,6 @@ typedef struct {
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*/
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bool emv_read_bank_card(FuriHalNfcTxRxContext* tx_rx, EmvApplication* emv_app);
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/** Search for EMV Application
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*
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* @param tx_rx FuriHalNfcTxRxContext instance
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* @param emv_app EmvApplication instance
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*
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* @return true on success
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*/
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bool emv_search_application(FuriHalNfcTxRxContext* tx_rx, EmvApplication* emv_app);
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/** Emulate bank card
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* @note Answer to application selection and PDOL
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*
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