[FL-663] Read EMV cards (#460)
* nfc: add emv decoder * api-hal-nfc: add data exchange api * nfc_worker: add read emv routine * nfc: add emv reader view * nfc: add support for Mastercard reading * api-hal-nfc: fix incorrect merge changes * nfc_worker: set to zero emv app object on each cycle * api-hal-nfc: add api for f6 target * nfc: move emv_decoder to lib folder Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
gornekich
GitHub
parent
df4a170213
commit
725981f431
@ -25,8 +25,10 @@ void nfc_menu_callback(void* context, uint32_t index) {
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if(index == 0) {
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message.type = NfcMessageTypeDetect;
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} else if(index == 1) {
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message.type = NfcMessageTypeEmulate;
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message.type = NfcMessageTypeReadEMV;
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} else if(index == 2) {
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message.type = NfcMessageTypeEmulate;
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} else if(index == 3) {
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message.type = NfcMessageTypeField;
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}
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furi_check(osMessageQueuePut(message_queue, &message, 0, osWaitForever) == osOK);
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@ -49,8 +51,9 @@ Nfc* nfc_alloc() {
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// Menu
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nfc->submenu = submenu_alloc();
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submenu_add_item(nfc->submenu, "Detect", 0, nfc_menu_callback, nfc);
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submenu_add_item(nfc->submenu, "Emulate", 1, nfc_menu_callback, nfc);
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submenu_add_item(nfc->submenu, "Field", 2, nfc_menu_callback, nfc);
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submenu_add_item(nfc->submenu, "Read EMV", 1, nfc_menu_callback, nfc);
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submenu_add_item(nfc->submenu, "Emulate", 2, nfc_menu_callback, nfc);
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submenu_add_item(nfc->submenu, "Field", 3, nfc_menu_callback, nfc);
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View* submenu_view = submenu_get_view(nfc->submenu);
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view_set_previous_callback(submenu_view, nfc_view_exit);
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view_dispatcher_add_view(nfc->view_dispatcher, NfcViewMenu, submenu_view);
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@ -63,6 +66,14 @@ Nfc* nfc_alloc() {
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view_allocate_model(nfc->view_detect, ViewModelTypeLocking, sizeof(NfcViewReadModel));
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view_dispatcher_add_view(nfc->view_dispatcher, NfcViewRead, nfc->view_detect);
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// Read EMV
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nfc->view_read_emv = view_alloc();
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view_set_context(nfc->view_read_emv, nfc);
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view_set_draw_callback(nfc->view_read_emv, nfc_view_read_emv_draw);
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view_set_previous_callback(nfc->view_read_emv, nfc_view_stop);
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view_allocate_model(nfc->view_read_emv, ViewModelTypeLocking, sizeof(NfcViewReadModel));
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view_dispatcher_add_view(nfc->view_dispatcher, NfcViewReadEmv, nfc->view_read_emv);
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// Emulate
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nfc->view_emulate = view_alloc();
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view_set_context(nfc->view_emulate, nfc);
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@ -143,7 +154,7 @@ void nfc_cli_detect(Cli* cli, string_t args, void* context) {
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printf("Detecting nfc...\r\nPress Ctrl+C to abort\r\n");
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while(!cmd_exit) {
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cmd_exit |= cli_cmd_interrupt_received(cli);
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cmd_exit |= api_hal_nfc_detect(&dev_list, &dev_cnt, 100);
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cmd_exit |= api_hal_nfc_detect(&dev_list, &dev_cnt, 100, true);
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if(dev_cnt > 0) {
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printf("Found %d devices\r\n", dev_cnt);
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for(uint8_t i = 0; i < dev_cnt; i++) {
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@ -196,6 +207,13 @@ int32_t nfc_task(void* p) {
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return true;
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});
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nfc_start(nfc, NfcViewRead, NfcWorkerStatePoll);
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} else if(message.type == NfcMessageTypeReadEMV) {
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with_view_model(
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nfc->view_read_emv, (NfcViewReadModel * model) {
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model->found = false;
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return true;
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});
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nfc_start(nfc, NfcViewReadEmv, NfcWorkerStateReadEMV);
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} else if(message.type == NfcMessageTypeEmulate) {
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nfc_start(nfc, NfcViewEmulate, NfcWorkerStateEmulate);
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} else if(message.type == NfcMessageTypeField) {
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@ -215,6 +233,19 @@ int32_t nfc_task(void* p) {
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model->found = false;
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return true;
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});
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} else if(message.type == NfcMessageTypeEMVFound) {
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with_view_model(
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nfc->view_read_emv, (NfcViewReadModel * model) {
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model->found = true;
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model->device = message.device;
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return true;
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});
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} else if(message.type == NfcMessageTypeEMVNotFound) {
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with_view_model(
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nfc->view_read_emv, (NfcViewReadModel * model) {
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model->found = false;
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return true;
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});
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} else if(message.type == NfcMessageTypeExit) {
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nfc_free(nfc);
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break;
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@ -27,6 +27,7 @@ struct Nfc {
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Submenu* submenu;
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View* view_detect;
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View* view_read_emv;
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View* view_emulate;
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View* view_field;
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View* view_cli;
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@ -44,9 +44,15 @@ typedef enum {
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NfcDeviceTypeNfcb,
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NfcDeviceTypeNfcf,
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NfcDeviceTypeNfcv,
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NfcDeviceTypeNfcMifare
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NfcDeviceTypeNfcMifare,
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NfcDeviceTypeEMV,
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} NfcDeviceType;
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typedef struct {
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char name[32];
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uint8_t number[8];
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} EMVCard;
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typedef struct {
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NfcDeviceType type;
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union {
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@ -54,6 +60,7 @@ typedef struct {
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rfalNfcbListenDevice nfcb;
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rfalNfcfListenDevice nfcf;
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rfalNfcvListenDevice nfcv;
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EMVCard emv_card;
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};
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} NfcDevice;
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@ -64,6 +71,7 @@ typedef enum {
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NfcWorkerStateReady,
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// Main worker states
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NfcWorkerStatePoll,
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NfcWorkerStateReadEMV,
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NfcWorkerStateEmulate,
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NfcWorkerStateField,
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// Transition
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@ -72,6 +80,7 @@ typedef enum {
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typedef enum {
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NfcMessageTypeDetect,
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NfcMessageTypeReadEMV,
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NfcMessageTypeEmulate,
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NfcMessageTypeField,
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NfcMessageTypeStop,
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@ -79,6 +88,8 @@ typedef enum {
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// From Worker
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NfcMessageTypeDeviceFound,
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NfcMessageTypeDeviceNotFound,
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NfcMessageTypeEMVFound,
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NfcMessageTypeEMVNotFound,
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} NfcMessageType;
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typedef struct {
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@ -104,6 +104,35 @@ void nfc_view_read_nfcv_draw(Canvas* canvas, NfcViewReadModel* model) {
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canvas_draw_str(canvas, 18, 42, buffer);
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}
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void nfc_view_read_emv_draw(Canvas* canvas, void* model) {
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NfcViewReadModel* m = model;
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canvas_clear(canvas);
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canvas_set_font(canvas, FontPrimary);
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char buffer[32];
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if(m->found) {
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canvas_draw_str(canvas, 0, 12, "Found EMV card");
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canvas_set_font(canvas, FontSecondary);
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snprintf(buffer, sizeof(buffer), "Type:\n");
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canvas_draw_str(canvas, 2, 22, buffer);
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snprintf(buffer, sizeof(buffer), "%s", m->device.emv_card.name);
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canvas_draw_str(canvas, 2, 32, buffer);
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snprintf(buffer, sizeof(buffer), "Number:\n");
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canvas_draw_str(canvas, 2, 42, buffer);
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uint8_t card_num_len = sizeof(m->device.emv_card.number);
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for(uint8_t i = 0; i < card_num_len; i++) {
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snprintf(
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buffer + (i * 2), sizeof(buffer) - (i * 2), "%02X", m->device.emv_card.number[i]);
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}
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buffer[card_num_len * 2] = 0;
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canvas_draw_str(canvas, 2, 52, buffer);
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} else {
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canvas_draw_str(canvas, 0, 12, "Searching");
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canvas_set_font(canvas, FontSecondary);
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canvas_draw_str(canvas, 2, 22, "Place card to the back");
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}
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}
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void nfc_view_emulate_draw(Canvas* canvas, void* model) {
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canvas_clear(canvas);
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canvas_set_font(canvas, FontPrimary);
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@ -10,6 +10,7 @@
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typedef enum {
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NfcViewMenu,
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NfcViewRead,
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NfcViewReadEmv,
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NfcViewEmulate,
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NfcViewField,
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NfcViewError,
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@ -25,6 +26,7 @@ void nfc_view_read_nfca_draw(Canvas* canvas, NfcViewReadModel* model);
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void nfc_view_read_nfcb_draw(Canvas* canvas, NfcViewReadModel* model);
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void nfc_view_read_nfcf_draw(Canvas* canvas, NfcViewReadModel* model);
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void nfc_view_read_nfcv_draw(Canvas* canvas, NfcViewReadModel* model);
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void nfc_view_read_emv_draw(Canvas* canvas, void* model);
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void nfc_view_emulate_draw(Canvas* canvas, void* model);
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151
applications/nfc/nfc_worker.c
Normal file → Executable file
151
applications/nfc/nfc_worker.c
Normal file → Executable file
@ -1,12 +1,15 @@
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#include "nfc_worker_i.h"
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#include <api-hal.h>
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#include "nfc_protocols/emv_decoder.h"
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#define NFC_WORKER_TAG "nfc worker"
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NfcWorker* nfc_worker_alloc(osMessageQueueId_t message_queue) {
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NfcWorker* nfc_worker = furi_alloc(sizeof(NfcWorker));
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nfc_worker->message_queue = message_queue;
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// Worker thread attributes
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nfc_worker->thread_attr.name = "nfc_worker";
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nfc_worker->thread_attr.stack_size = 2048;
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nfc_worker->thread_attr.stack_size = 8192;
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// Initialize rfal
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nfc_worker->error = api_hal_nfc_init();
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if(nfc_worker->error == ERR_NONE) {
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@ -59,17 +62,159 @@ void nfc_worker_task(void* context) {
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if(nfc_worker->state == NfcWorkerStatePoll) {
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nfc_worker_poll(nfc_worker);
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} else if(nfc_worker->state == NfcWorkerStateReadEMV) {
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nfc_worker_read_emv(nfc_worker);
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} else if(nfc_worker->state == NfcWorkerStateEmulate) {
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nfc_worker_emulate(nfc_worker);
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} else if(nfc_worker->state == NfcWorkerStateField) {
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nfc_worker_field(nfc_worker);
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}
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nfc_worker_change_state(nfc_worker, NfcWorkerStateReady);
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api_hal_power_insomnia_exit();
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osThreadExit();
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}
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void nfc_worker_read_emv(NfcWorker* nfc_worker) {
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ReturnCode err;
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rfalNfcDevice* dev_list;
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rfalNfcDevice* dev_active;
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EmvApplication emv_app = {};
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uint8_t dev_cnt = 0;
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uint8_t tx_buff[255] = {};
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uint16_t tx_len = 0;
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uint8_t* rx_buff;
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uint16_t* rx_len;
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// Update screen before start searching
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NfcMessage message = {.type = NfcMessageTypeEMVNotFound};
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while(nfc_worker->state == NfcWorkerStateReadEMV) {
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furi_check(
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osMessageQueuePut(nfc_worker->message_queue, &message, 0, osWaitForever) == osOK);
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memset(&emv_app, 0, sizeof(emv_app));
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if(api_hal_nfc_detect(&dev_list, &dev_cnt, 100, false)) {
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// Card was found. Check that it supports EMV
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if(dev_list[0].rfInterface == RFAL_NFC_INTERFACE_ISODEP) {
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dev_active = &dev_list[0];
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FURI_LOG_I(NFC_WORKER_TAG, "Send select PPSE command");
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tx_len = emv_prepare_select_ppse(tx_buff);
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err = api_hal_nfc_data_exchange(
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dev_active, tx_buff, tx_len, &rx_buff, &rx_len, false);
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if(err != ERR_NONE) {
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FURI_LOG_E(NFC_WORKER_TAG, "Error during selection PPSE request: %d", err);
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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continue;
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}
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FURI_LOG_I(
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NFC_WORKER_TAG, "Select PPSE response received. Start parsing response");
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if(emv_decode_ppse_response(rx_buff, *rx_len, &emv_app)) {
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FURI_LOG_I(NFC_WORKER_TAG, "Select PPSE responce parced");
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} else {
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FURI_LOG_E(NFC_WORKER_TAG, "Can't find pay application");
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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continue;
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}
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FURI_LOG_I(NFC_WORKER_TAG, "Starting application ...");
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tx_len = emv_prepare_select_app(tx_buff, &emv_app);
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err = api_hal_nfc_data_exchange(
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dev_active, tx_buff, tx_len, &rx_buff, &rx_len, false);
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if(err != ERR_NONE) {
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FURI_LOG_E(
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NFC_WORKER_TAG, "Error during application selection request: %d", err);
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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continue;
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}
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FURI_LOG_I(
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NFC_WORKER_TAG,
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"Select application response received. Start parsing response");
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if(emv_decode_select_app_response(rx_buff, *rx_len, &emv_app)) {
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FURI_LOG_I(NFC_WORKER_TAG, "Card name: %s", emv_app.name);
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memcpy(message.device.emv_card.name, emv_app.name, sizeof(emv_app.name));
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} else {
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FURI_LOG_E(NFC_WORKER_TAG, "Can't read card name");
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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continue;
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}
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FURI_LOG_I(NFC_WORKER_TAG, "Starting Get Processing Options command ...");
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tx_len = emv_prepare_get_proc_opt(tx_buff, &emv_app);
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err = api_hal_nfc_data_exchange(
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dev_active, tx_buff, tx_len, &rx_buff, &rx_len, false);
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if(err != ERR_NONE) {
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FURI_LOG_E(
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NFC_WORKER_TAG, "Error during Get Processing Options command: %d", err);
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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continue;
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}
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if(emv_decode_get_proc_opt(rx_buff, *rx_len, &emv_app)) {
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FURI_LOG_I(NFC_WORKER_TAG, "Card number parsed");
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message.type = NfcMessageTypeEMVFound;
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memcpy(
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message.device.emv_card.number,
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emv_app.card_number,
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sizeof(emv_app.card_number));
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api_hal_nfc_deactivate();
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continue;
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} else {
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// Mastercard doesn't give PAN / card number as GPO response
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// Iterate over all files found in application
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bool pan_found = false;
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for(uint8_t i = 0; (i < emv_app.afl.size) && !pan_found; i += 4) {
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uint8_t sfi = emv_app.afl.data[i] >> 3;
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uint8_t record_start = emv_app.afl.data[i + 1];
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uint8_t record_end = emv_app.afl.data[i + 2];
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// Iterate over all records in file
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for(uint8_t record = record_start; record <= record_end; ++record) {
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tx_len = emv_prepare_read_sfi_record(tx_buff, sfi, record);
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err = api_hal_nfc_data_exchange(
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dev_active, tx_buff, tx_len, &rx_buff, &rx_len, false);
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if(err != ERR_NONE) {
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FURI_LOG_E(
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NFC_WORKER_TAG,
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"Error reading application sfi %d, record %d",
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sfi,
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record);
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}
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if(emv_decode_read_sfi_record(rx_buff, *rx_len, &emv_app)) {
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pan_found = true;
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break;
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}
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}
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}
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if(pan_found) {
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FURI_LOG_I(NFC_WORKER_TAG, "Card PAN found");
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message.type = NfcMessageTypeEMVFound;
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memcpy(
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message.device.emv_card.number,
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emv_app.card_number,
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sizeof(emv_app.card_number));
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} else {
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FURI_LOG_E(NFC_WORKER_TAG, "Can't read card number");
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message.type = NfcMessageTypeEMVNotFound;
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}
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api_hal_nfc_deactivate();
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}
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} else {
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// Can't find EMV card
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FURI_LOG_W(NFC_WORKER_TAG, "Card doesn't support EMV");
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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}
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} else {
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// Can't find EMV card
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FURI_LOG_W(NFC_WORKER_TAG, "Can't find any cards");
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message.type = NfcMessageTypeEMVNotFound;
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api_hal_nfc_deactivate();
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}
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osDelay(20);
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}
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api_hal_nfc_deactivate();
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}
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void nfc_worker_poll(NfcWorker* nfc_worker) {
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rfalNfcDevice* dev_list;
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uint8_t dev_cnt;
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@ -78,7 +223,7 @@ void nfc_worker_poll(NfcWorker* nfc_worker) {
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furi_check(osMessageQueuePut(nfc_worker->message_queue, &message, 0, osWaitForever) == osOK);
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while(nfc_worker->state == NfcWorkerStatePoll) {
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if(api_hal_nfc_detect(&dev_list, &dev_cnt, 100)) {
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if(api_hal_nfc_detect(&dev_list, &dev_cnt, 100, true)) {
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// Send message with first device found
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message.type = NfcMessageTypeDeviceFound;
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if(dev_list[0].type == RFAL_NFC_LISTEN_TYPE_NFCA) {
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@ -29,6 +29,8 @@ void nfc_worker_change_state(NfcWorker* nfc_worker, NfcWorkerState state);
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void nfc_worker_task(void* context);
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void nfc_worker_read_emv(NfcWorker* nfc_worker);
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||||
|
||||
void nfc_worker_poll(NfcWorker* nfc_worker);
|
||||
|
||||
void nfc_worker_emulate(NfcWorker* nfc_worker);
|
||||
|
||||
@ -42,7 +42,17 @@ void api_hal_nfc_exit_sleep();
|
||||
/**
|
||||
* NFC poll
|
||||
*/
|
||||
bool api_hal_nfc_detect(rfalNfcDevice** dev_list, uint8_t* dev_cnt, uint32_t cycles);
|
||||
bool api_hal_nfc_detect(rfalNfcDevice** dev_list, uint8_t* dev_cnt, uint32_t cycles, bool deactivate);
|
||||
|
||||
/**
|
||||
* NFC data exchange
|
||||
*/
|
||||
ReturnCode api_hal_nfc_data_exchange(rfalNfcDevice* dev, uint8_t* tx_buff, uint16_t tx_len, uint8_t** rx_buff, uint16_t** rx_len, bool deactivate);
|
||||
|
||||
/**
|
||||
* NFC deactivate and start sleep
|
||||
*/
|
||||
void api_hal_nfc_deactivate();
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
|
||||
@ -40,7 +40,7 @@ static void api_hal_nfc_change_state_cb(rfalNfcState st) {
|
||||
}
|
||||
}
|
||||
|
||||
bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cycles) {
|
||||
bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cycles, bool deactivate) {
|
||||
furi_assert(dev_list);
|
||||
furi_assert(dev_cnt);
|
||||
|
||||
@ -74,8 +74,10 @@ bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cyc
|
||||
}
|
||||
osDelay(5);
|
||||
}
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
if(deactivate) {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
if(!cycles) {
|
||||
FURI_LOG_D("HAL NFC", "Timeout");
|
||||
return false;
|
||||
@ -83,3 +85,44 @@ bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cyc
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
ReturnCode api_hal_nfc_data_exchange(rfalNfcDevice* dev, uint8_t* tx_buff, uint16_t tx_len, uint8_t** rx_buff, uint16_t** rx_len, bool deactivate) {
|
||||
furi_assert(dev);
|
||||
furi_assert(tx_buff);
|
||||
furi_assert(rx_buff);
|
||||
furi_assert(rx_len);
|
||||
|
||||
ReturnCode ret;
|
||||
rfalNfcDevice* active_dev;
|
||||
rfalNfcState state = RFAL_NFC_STATE_ACTIVATED;
|
||||
|
||||
ret = rfalNfcGetActiveDevice(&active_dev);
|
||||
if(ret != ERR_NONE) {
|
||||
return ret;
|
||||
}
|
||||
if (active_dev != dev) {
|
||||
return ERR_NOTFOUND;
|
||||
}
|
||||
ret = rfalNfcDataExchangeStart(tx_buff, tx_len, rx_buff, rx_len, 0);
|
||||
if(ret != ERR_NONE) {
|
||||
return ret;
|
||||
}
|
||||
FURI_LOG_D("HAL NFC", "Start data exchange");
|
||||
while(state != RFAL_NFC_STATE_DATAEXCHANGE_DONE) {
|
||||
rfalNfcWorker();
|
||||
state = rfalNfcGetState();
|
||||
FURI_LOG_D("HAL NFC", "Data exchange status: %d", rfalNfcDataExchangeGetStatus());
|
||||
osDelay(10);
|
||||
}
|
||||
FURI_LOG_D("HAL NFC", "Data exchange complete");
|
||||
if(deactivate) {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
return ERR_NONE;
|
||||
}
|
||||
|
||||
void api_hal_nfc_deactivate() {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
|
||||
@ -40,7 +40,7 @@ static void api_hal_nfc_change_state_cb(rfalNfcState st) {
|
||||
}
|
||||
}
|
||||
|
||||
bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cycles) {
|
||||
bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cycles, bool deactivate) {
|
||||
furi_assert(dev_list);
|
||||
furi_assert(dev_cnt);
|
||||
|
||||
@ -74,8 +74,10 @@ bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cyc
|
||||
}
|
||||
osDelay(5);
|
||||
}
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
if(deactivate) {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
if(!cycles) {
|
||||
FURI_LOG_D("HAL NFC", "Timeout");
|
||||
return false;
|
||||
@ -83,3 +85,44 @@ bool api_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t cyc
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
ReturnCode api_hal_nfc_data_exchange(rfalNfcDevice* dev, uint8_t* tx_buff, uint16_t tx_len, uint8_t** rx_buff, uint16_t** rx_len, bool deactivate) {
|
||||
furi_assert(dev);
|
||||
furi_assert(tx_buff);
|
||||
furi_assert(rx_buff);
|
||||
furi_assert(rx_len);
|
||||
|
||||
ReturnCode ret;
|
||||
rfalNfcDevice* active_dev;
|
||||
rfalNfcState state = RFAL_NFC_STATE_ACTIVATED;
|
||||
|
||||
ret = rfalNfcGetActiveDevice(&active_dev);
|
||||
if(ret != ERR_NONE) {
|
||||
return ret;
|
||||
}
|
||||
if (active_dev != dev) {
|
||||
return ERR_NOTFOUND;
|
||||
}
|
||||
ret = rfalNfcDataExchangeStart(tx_buff, tx_len, rx_buff, rx_len, 0);
|
||||
if(ret != ERR_NONE) {
|
||||
return ret;
|
||||
}
|
||||
FURI_LOG_D("HAL NFC", "Start data exchange");
|
||||
while(state != RFAL_NFC_STATE_DATAEXCHANGE_DONE) {
|
||||
rfalNfcWorker();
|
||||
state = rfalNfcGetState();
|
||||
FURI_LOG_D("HAL NFC", "Data exchange status: %d", rfalNfcDataExchangeGetStatus());
|
||||
osDelay(10);
|
||||
}
|
||||
FURI_LOG_D("HAL NFC", "Data exchange complete");
|
||||
if(deactivate) {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
return ERR_NONE;
|
||||
}
|
||||
|
||||
void api_hal_nfc_deactivate() {
|
||||
rfalNfcDeactivate(false);
|
||||
rfalLowPowerModeStart();
|
||||
}
|
||||
|
||||
@ -51,6 +51,9 @@ CFLAGS += -I$(ST25RFAL002_DIR)/source/st25r3916
|
||||
C_SOURCES += $(wildcard $(ST25RFAL002_DIR)/*.c)
|
||||
C_SOURCES += $(wildcard $(ST25RFAL002_DIR)/source/*.c)
|
||||
C_SOURCES += $(wildcard $(ST25RFAL002_DIR)/source/st25r3916/*.c)
|
||||
|
||||
CFLAGS += -I$(LIB_DIR)/nfc_protocols
|
||||
C_SOURCES += $(wildcard $(LIB_DIR)/nfc_protocols/*.c)
|
||||
endif
|
||||
|
||||
# callback connector (C to CPP) library
|
||||
|
||||
205
lib/nfc_protocols/emv_decoder.c
Executable file
205
lib/nfc_protocols/emv_decoder.c
Executable file
@ -0,0 +1,205 @@
|
||||
#include "emv_decoder.h"
|
||||
|
||||
const PDOLValue pdol_term_info = {0x9F59, {0xC8, 0x80, 0x00}}; // Terminal transaction information
|
||||
const PDOLValue pdol_term_type = {0x9F5A, {0x00}}; // Terminal transaction type
|
||||
const PDOLValue pdol_merchant_type = {0x9F58, {0x01}}; // Merchant type indicator
|
||||
const PDOLValue pdol_term_trans_qualifies = {
|
||||
0x9F66,
|
||||
{0x79, 0x00, 0x40, 0x80}}; // Terminal transaction qualifiers
|
||||
const PDOLValue pdol_amount_authorise = {
|
||||
0x9F02,
|
||||
{0x00, 0x00, 0x00, 0x10, 0x00, 0x00}}; // Amount, authorised
|
||||
const PDOLValue pdol_amount = {0x9F03, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}; // Amount
|
||||
const PDOLValue pdol_country_code = {0x9F1A, {0x01, 0x24}}; // Terminal country code
|
||||
const PDOLValue pdol_currency_code = {0x5F2A, {0x01, 0x24}}; // Transaction currency code
|
||||
const PDOLValue pdol_term_verification = {
|
||||
0x95,
|
||||
{0x00, 0x00, 0x00, 0x00, 0x00}}; // Terminal verification results
|
||||
const PDOLValue pdol_transaction_date = {0x9A, {0x19, 0x01, 0x01}}; // Transaction date
|
||||
const PDOLValue pdol_transaction_type = {0x9C, {0x00}}; // Transaction type
|
||||
const PDOLValue pdol_transaction_cert = {0x98, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}; // Transaction cert
|
||||
const PDOLValue pdol_unpredict_number = {0x9F37, {0x82, 0x3D, 0xDE, 0x7A}}; // Unpredictable number
|
||||
|
||||
const PDOLValue* pdol_values[] = {
|
||||
&pdol_term_info,
|
||||
&pdol_term_type,
|
||||
&pdol_merchant_type,
|
||||
&pdol_term_trans_qualifies,
|
||||
&pdol_amount_authorise,
|
||||
&pdol_amount,
|
||||
&pdol_country_code,
|
||||
&pdol_currency_code,
|
||||
&pdol_term_verification,
|
||||
&pdol_transaction_date,
|
||||
&pdol_transaction_type,
|
||||
&pdol_transaction_cert,
|
||||
&pdol_unpredict_number,
|
||||
};
|
||||
|
||||
static uint16_t emv_parse_TLV(uint8_t* dest, uint8_t* src, uint16_t* idx) {
|
||||
uint8_t len = src[*idx + 1];
|
||||
memcpy(dest, &src[*idx + 2], len);
|
||||
*idx = *idx + len + 1;
|
||||
return len;
|
||||
}
|
||||
|
||||
uint16_t emv_prepare_select_ppse(uint8_t* dest) {
|
||||
const uint8_t emv_select_ppse[] = {
|
||||
0x00, 0xA4, // SELECT ppse
|
||||
0x04, 0x00, // P1:By name, P2: empty
|
||||
0x0e, // Lc: Data length
|
||||
0x32, 0x50, 0x41, 0x59, 0x2e, 0x53, 0x59, // Data string:
|
||||
0x53, 0x2e, 0x44, 0x44, 0x46, 0x30, 0x31, // 2PAY.SYS.DDF01 (PPSE)
|
||||
0x00 // Le
|
||||
};
|
||||
memcpy(dest, emv_select_ppse, sizeof(emv_select_ppse));
|
||||
return sizeof(emv_select_ppse);
|
||||
}
|
||||
|
||||
bool emv_decode_ppse_response(uint8_t* buff, uint16_t len, EmvApplication* app) {
|
||||
uint16_t i = 0;
|
||||
bool app_aid_found = false;
|
||||
|
||||
while(i < len) {
|
||||
if(buff[i] == EMV_TAG_APP_TEMPLATE) {
|
||||
uint8_t app_len = buff[++i];
|
||||
for(uint16_t j = i; j < i + app_len; j++) {
|
||||
if(buff[j] == EMV_TAG_AID) {
|
||||
app_aid_found = true;
|
||||
app->aid_len = buff[j + 1];
|
||||
emv_parse_TLV(app->aid, buff, &j);
|
||||
} else if(buff[j] == EMV_TAG_PRIORITY) {
|
||||
emv_parse_TLV(&app->priority, buff, &j);
|
||||
}
|
||||
}
|
||||
i += app_len;
|
||||
}
|
||||
i++;
|
||||
}
|
||||
return app_aid_found;
|
||||
}
|
||||
|
||||
uint16_t emv_prepare_select_app(uint8_t* dest, EmvApplication* app) {
|
||||
const uint8_t emv_select_header[] = {
|
||||
0x00,
|
||||
0xA4, // SELECT application
|
||||
0x04,
|
||||
0x00 // P1:By name, P2:First or only occurence
|
||||
};
|
||||
uint16_t size = sizeof(emv_select_header);
|
||||
// Copy header
|
||||
memcpy(dest, emv_select_header, size);
|
||||
// Copy AID
|
||||
dest[size++] = app->aid_len;
|
||||
memcpy(&dest[size], app->aid, app->aid_len);
|
||||
size += app->aid_len;
|
||||
dest[size++] = 0;
|
||||
return size;
|
||||
}
|
||||
|
||||
bool emv_decode_select_app_response(uint8_t* buff, uint16_t len, EmvApplication* app) {
|
||||
uint16_t i = 0;
|
||||
bool found_name = false;
|
||||
|
||||
while(i < len) {
|
||||
if(buff[i] == EMV_TAG_CARD_NAME) {
|
||||
uint8_t name_len = buff[i + 1];
|
||||
emv_parse_TLV((uint8_t*)app->name, buff, &i);
|
||||
app->name[name_len] = '\0';
|
||||
found_name = true;
|
||||
} else if(((buff[i] << 8) | buff[i + 1]) == EMV_TAG_PDOL) {
|
||||
i++;
|
||||
app->pdol.size = emv_parse_TLV(app->pdol.data, buff, &i);
|
||||
}
|
||||
i++;
|
||||
}
|
||||
return found_name;
|
||||
}
|
||||
|
||||
static uint16_t emv_prepare_pdol(APDU* dest, APDU* src) {
|
||||
bool tag_found;
|
||||
for(uint16_t i = 0; i < src->size; i++) {
|
||||
tag_found = false;
|
||||
for(uint8_t j = 0; j < sizeof(pdol_values) / sizeof(PDOLValue*); j++) {
|
||||
if(src->data[i] == pdol_values[j]->tag) {
|
||||
// Found tag with 1 byte length
|
||||
uint8_t len = src->data[++i];
|
||||
memcpy(dest->data + dest->size, pdol_values[j]->data, len);
|
||||
dest->size += len;
|
||||
tag_found = true;
|
||||
break;
|
||||
} else if(((src->data[i] << 8) | src->data[i + 1]) == pdol_values[j]->tag) {
|
||||
// Found tag with 2 byte length
|
||||
i += 2;
|
||||
uint8_t len = src->data[i];
|
||||
memcpy(dest->data + dest->size, pdol_values[j]->data, len);
|
||||
dest->size += len;
|
||||
tag_found = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(!tag_found) {
|
||||
// Unknown tag, fill zeros
|
||||
i += 2;
|
||||
uint8_t len = src->data[i];
|
||||
memset(dest->data + dest->size, 0, len);
|
||||
dest->size += len;
|
||||
}
|
||||
}
|
||||
return dest->size;
|
||||
}
|
||||
|
||||
uint16_t emv_prepare_get_proc_opt(uint8_t* dest, EmvApplication* app) {
|
||||
// Get processing option header
|
||||
const uint8_t emv_gpo_header[] = {0x80, 0xA8, 0x00, 0x00};
|
||||
uint16_t size = sizeof(emv_gpo_header);
|
||||
// Copy header
|
||||
memcpy(dest, emv_gpo_header, size);
|
||||
APDU pdol_data = {0, {0}};
|
||||
// Prepare and copy pdol parameters
|
||||
emv_prepare_pdol(&pdol_data, &app->pdol);
|
||||
dest[size++] = 0x02 + pdol_data.size;
|
||||
dest[size++] = 0x83;
|
||||
dest[size++] = pdol_data.size;
|
||||
memcpy(dest + size, pdol_data.data, pdol_data.size);
|
||||
size += pdol_data.size;
|
||||
dest[size++] = 0;
|
||||
return size;
|
||||
}
|
||||
|
||||
bool emv_decode_get_proc_opt(uint8_t* buff, uint16_t len, EmvApplication* app) {
|
||||
for(uint16_t i = 0; i < len; i++) {
|
||||
if(buff[i] == EMV_TAG_CARD_NUM) {
|
||||
memcpy(app->card_number, &buff[i + 2], 8);
|
||||
return true;
|
||||
} else if(buff[i] == EMV_TAG_AFL) {
|
||||
app->afl.size = emv_parse_TLV(app->afl.data, buff, &i);
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
uint16_t emv_prepare_read_sfi_record(uint8_t* dest, uint8_t sfi, uint8_t record_num) {
|
||||
const uint8_t sfi_param = (sfi << 3) | (1 << 2);
|
||||
const uint8_t emv_sfi_header[] = {
|
||||
0x00,
|
||||
0xB2, // READ RECORD
|
||||
record_num,
|
||||
sfi_param, // P1:record_number and P2:SFI
|
||||
0x00 // Le
|
||||
};
|
||||
uint16_t size = sizeof(emv_sfi_header);
|
||||
memcpy(dest, emv_sfi_header, size);
|
||||
return size;
|
||||
}
|
||||
|
||||
bool emv_decode_read_sfi_record(uint8_t* buff, uint16_t len, EmvApplication* app) {
|
||||
for(uint16_t i = 0; i < len; i++) {
|
||||
if(buff[i] == EMV_TAG_PAN) {
|
||||
memcpy(app->card_number, &buff[i + 2], 8);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
50
lib/nfc_protocols/emv_decoder.h
Executable file
50
lib/nfc_protocols/emv_decoder.h
Executable file
@ -0,0 +1,50 @@
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include <string.h>
|
||||
|
||||
#define MAX_APDU_LEN 255
|
||||
|
||||
#define EMV_TAG_APP_TEMPLATE 0x61
|
||||
#define EMV_TAG_AID 0x4F
|
||||
#define EMV_TAG_PRIORITY 0x87
|
||||
#define EMV_TAG_PDOL 0x9F38
|
||||
#define EMV_TAG_CARD_NAME 0x50
|
||||
#define EMV_TAG_FCI 0xBF0C
|
||||
#define EMV_TAG_LOG_CTRL 0x9F4D
|
||||
#define EMV_TAG_CARD_NUM 0x57
|
||||
#define EMV_TAG_PAN 0x5A
|
||||
#define EMV_TAG_AFL 0x94
|
||||
|
||||
typedef struct {
|
||||
uint16_t tag;
|
||||
uint8_t data[];
|
||||
} PDOLValue;
|
||||
|
||||
extern const PDOLValue* pdol_values[];
|
||||
|
||||
typedef struct {
|
||||
uint8_t size;
|
||||
uint8_t data[MAX_APDU_LEN];
|
||||
} APDU;
|
||||
|
||||
typedef struct {
|
||||
uint8_t priority;
|
||||
uint8_t aid[16];
|
||||
uint8_t aid_len;
|
||||
char name[32];
|
||||
uint8_t card_number[8];
|
||||
APDU pdol;
|
||||
APDU afl;
|
||||
} EmvApplication;
|
||||
|
||||
uint16_t emv_prepare_select_ppse(uint8_t* dest);
|
||||
bool emv_decode_ppse_response(uint8_t* buff, uint16_t len, EmvApplication* app);
|
||||
|
||||
uint16_t emv_prepare_select_app(uint8_t* dest, EmvApplication* app);
|
||||
bool emv_decode_select_app_response(uint8_t* buff, uint16_t len, EmvApplication* app);
|
||||
|
||||
uint16_t emv_prepare_get_proc_opt(uint8_t* dest, EmvApplication* app);
|
||||
bool emv_decode_get_proc_opt(uint8_t* buff, uint16_t len, EmvApplication* app);
|
||||
|
||||
uint16_t emv_prepare_read_sfi_record(uint8_t* dest, uint8_t sfi, uint8_t record_num);
|
||||
bool emv_decode_read_sfi_record(uint8_t* buff, uint16_t len, EmvApplication* app);
|
||||
Loading…
Reference in New Issue
Block a user