Nfc: add basic Mifare DESFire support (#1024)

* Fix TextBox word wrap behavior * Wrap width is 120 pixels, not 140. (140 is larger than the screen!) * Glyph width already includes spacing; don't add 1 additional px * When starting a new line, include wrapped glyph width in new line_width. * Call canvas_set_font before text_box_insert_endline so that glyph width is calculated using correct font. Previous approach worked somewhat well using default TextBoxFontText but this version is more robust, particularly when using TextBoxFontHex. * Add basic Mifare DESFire reading, file/app browser * Fix build with APP_ARCHIVE=0 * Add bool type to flipper_format * Add ability to save and load DESFire card data * Skip over NfcSceneDeviceInfo when viewing saved DESFire info * mf_df_clear: don't leak master key settings key versions * When opening a DESFire card from Archive, retain UID emulation behavior * rm unnecessary \r\n * show Popup instead of leaving view in bad state * Move NfcReaderRequestData out of union This makes it safe to emulate DESFire/EMV without clobbering card data. * Display saved DESFire cards via NfcSceneDeviceInfo * Display and save file metadata even when contents are missing This can happen when a file doesn't allow unauthenticated reads (see the call to mf_df_parse_read_data_response in nfc_worker.c). Co-authored-by: Kevin Wallace <git+flipperzero@kevin.wallace.seattle.wa.us> Co-authored-by: あく <alleteam@gmail.com> Co-authored-by: gornekich <n.gorbadey@gmail.com>
2022-03-23 06:45:37 -07:00
parent d075e00ae1
commit 3857cd7d5f
26 changed files with 1941 additions and 14 deletions
--- a/applications/nfc/scenes/nfc_scene_mifare_desfire_app.c
+++ b/applications/nfc/scenes/nfc_scene_mifare_desfire_app.c
@@ -0,0 +1,119 @@
+#include "../nfc_i.h"
+
+#define TAG "NfcSceneMifareDesfireApp"
+
+enum SubmenuIndex {
+    SubmenuIndexAppInfo,
+    SubmenuIndexDynamic, // dynamic indexes start here
+};
+
+MifareDesfireApplication* nfc_scene_mifare_desfire_app_get_app(Nfc* nfc) {
+    uint32_t app_idx =
+        scene_manager_get_scene_state(nfc->scene_manager, NfcSceneMifareDesfireApp) >> 1;
+    MifareDesfireApplication* app = nfc->dev->dev_data.mf_df_data.app_head;
+    for(int i = 0; i < app_idx && app; i++) {
+        app = app->next;
+    }
+    return app;
+}
+
+void nfc_scene_mifare_desfire_app_submenu_callback(void* context, uint32_t index) {
+    Nfc* nfc = (Nfc*)context;
+
+    view_dispatcher_send_custom_event(nfc->view_dispatcher, index);
+}
+
+void nfc_scene_mifare_desfire_app_on_enter(void* context) {
+    Nfc* nfc = (Nfc*)context;
+    Submenu* submenu = nfc->submenu;
+    MifareDesfireApplication* app = nfc_scene_mifare_desfire_app_get_app(nfc);
+    if(!app) {
+        popup_set_icon(nfc->popup, 5, 5, &I_WarningDolphin_45x42);
+        popup_set_header(nfc->popup, "Internal Error!", 55, 12, AlignLeft, AlignBottom);
+        popup_set_text(
+            nfc->popup,
+            "No app selected.\nThis should\nnever happen,\nplease file a bug.",
+            55,
+            15,
+            AlignLeft,
+            AlignTop);
+        view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewPopup);
+        FURI_LOG_E(TAG, "Bad state. No app selected?");
+        return;
+    }
+
+    text_box_set_font(nfc->text_box, TextBoxFontHex);
+
+    submenu_add_item(
+        submenu,
+        "App info",
+        SubmenuIndexAppInfo,
+        nfc_scene_mifare_desfire_app_submenu_callback,
+        nfc);
+
+    uint16_t cap = NFC_TEXT_STORE_SIZE;
+    char* buf = nfc->text_store;
+    int idx = SubmenuIndexDynamic;
+    for(MifareDesfireFile* file = app->file_head; file; file = file->next) {
+        int size = snprintf(buf, cap, "File %d", file->id);
+        if(size < 0 || size >= cap) {
+            FURI_LOG_W(
+                TAG,
+                "Exceeded NFC_TEXT_STORE_SIZE when preparing file id strings; menu truncated");
+            break;
+        }
+        char* label = buf;
+        cap -= size + 1;
+        buf += size + 1;
+        submenu_add_item(
+            submenu, label, idx++, nfc_scene_mifare_desfire_app_submenu_callback, nfc);
+    }
+
+    view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewMenu);
+}
+
+bool nfc_scene_mifare_desfire_app_on_event(void* context, SceneManagerEvent event) {
+    Nfc* nfc = (Nfc*)context;
+    uint32_t state = scene_manager_get_scene_state(nfc->scene_manager, NfcSceneMifareDesfireApp);
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        MifareDesfireApplication* app = nfc_scene_mifare_desfire_app_get_app(nfc);
+        TextBox* text_box = nfc->text_box;
+        string_reset(nfc->text_box_store);
+        if(event.event == SubmenuIndexAppInfo) {
+            mf_df_cat_application_info(app, nfc->text_box_store);
+        } else {
+            uint16_t index = event.event - SubmenuIndexDynamic;
+            MifareDesfireFile* file = app->file_head;
+            for(int i = 0; file && i < index; i++) {
+                file = file->next;
+            }
+            if(!file) {
+                return false;
+            }
+            mf_df_cat_file(file, nfc->text_box_store);
+        }
+        text_box_set_text(text_box, string_get_cstr(nfc->text_box_store));
+        scene_manager_set_scene_state(nfc->scene_manager, NfcSceneMifareDesfireApp, state | 1);
+        view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewTextBox);
+        return true;
+    } else if(event.type == SceneManagerEventTypeBack) {
+        if(state & 1) {
+            view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewMenu);
+            scene_manager_set_scene_state(
+                nfc->scene_manager, NfcSceneMifareDesfireApp, state & ~1);
+            return true;
+        }
+    }
+
+    return false;
+}
+
+void nfc_scene_mifare_desfire_app_on_exit(void* context) {
+    Nfc* nfc = (Nfc*)context;
+
+    text_box_reset(nfc->text_box);
+    string_reset(nfc->text_box_store);
+
+    submenu_reset(nfc->submenu);
+}