[FL-1958] U2F prototype (#879)

* U2F implementation prototype
* U2F data encryption and store, user confirmation request
* remove debug prints
* fix notification bug in chrome
* split u2f_alloc into u2f_init and u2f_alloc
* typo fix, furi-hal-trng -> furi-hal-random
* rand/srand redefinition
* SubGhz: a little bit of Dante.
* u2f_data naming fix

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/u2f/views/u2f_view.c

@@ -0,0 +1,91 @@
+#include "u2f_view.h"
+#include <gui/elements.h>
+
+struct U2fView {
+    View* view;
+    U2fOkCallback callback;
+    void* context;
+};
+
+typedef struct {
+    U2fViewMsg display_msg;
+} U2fModel;
+
+static void u2f_view_draw_callback(Canvas* canvas, void* _model) {
+    U2fModel* model = _model;
+
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str_aligned(canvas, 0, 0, AlignLeft, AlignTop, "U2F Demo");
+
+    if(model->display_msg == U2fMsgRegister) {
+        canvas_set_font(canvas, FontPrimary);
+        canvas_draw_str_aligned(canvas, 0, 45, AlignLeft, AlignBottom, "Registration");
+        canvas_set_font(canvas, FontSecondary);
+        canvas_draw_str_aligned(canvas, 0, 63, AlignLeft, AlignBottom, "Press [OK] to confirm");
+    } else if(model->display_msg == U2fMsgAuth) {
+        canvas_set_font(canvas, FontPrimary);
+        canvas_draw_str_aligned(canvas, 0, 45, AlignLeft, AlignBottom, "Authentication");
+        canvas_set_font(canvas, FontSecondary);
+        canvas_draw_str_aligned(canvas, 0, 63, AlignLeft, AlignBottom, "Press [OK] to confirm");
+    } else if(model->display_msg == U2fMsgError) {
+        canvas_set_font(canvas, FontPrimary);
+        canvas_draw_str_aligned(canvas, 64, 40, AlignCenter, AlignCenter, "U2F data missing");
+    }
+}
+
+static bool u2f_view_input_callback(InputEvent* event, void* context) {
+    furi_assert(context);
+    U2fView* u2f = context;
+    bool consumed = false;
+
+    if(event->type == InputTypeShort) {
+        if(event->key == InputKeyOk) {
+            consumed = true;
+            if(u2f->callback != NULL) u2f->callback(InputTypeShort, u2f->context);
+        }
+    }
+
+    return consumed;
+}
+
+U2fView* u2f_view_alloc() {
+    U2fView* u2f = furi_alloc(sizeof(U2fView));
+
+    u2f->view = view_alloc();
+    view_allocate_model(u2f->view, ViewModelTypeLocking, sizeof(U2fModel));
+    view_set_context(u2f->view, u2f);
+    view_set_draw_callback(u2f->view, u2f_view_draw_callback);
+    view_set_input_callback(u2f->view, u2f_view_input_callback);
+
+    return u2f;
+}
+
+void u2f_view_free(U2fView* u2f) {
+    furi_assert(u2f);
+    view_free(u2f->view);
+    free(u2f);
+}
+
+View* u2f_view_get_view(U2fView* u2f) {
+    furi_assert(u2f);
+    return u2f->view;
+}
+
+void u2f_view_set_ok_callback(U2fView* u2f, U2fOkCallback callback, void* context) {
+    furi_assert(u2f);
+    furi_assert(callback);
+    with_view_model(
+        u2f->view, (U2fModel * model) {
+            u2f->callback = callback;
+            u2f->context = context;
+            return false;
+        });
+}
+
+void u2f_view_set_state(U2fView* u2f, U2fViewMsg msg) {
+    with_view_model(
+        u2f->view, (U2fModel * model) {
+            model->display_msg = msg;
+            return false;
+        });
+}

applications/u2f/views/u2f_view.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <gui/view.h>
+
+typedef struct U2fView U2fView;
+typedef void (*U2fOkCallback)(InputType type, void* context);
+
+typedef enum {
+    U2fMsgNone,
+    U2fMsgRegister,
+    U2fMsgAuth,
+    U2fMsgError,
+} U2fViewMsg;
+
+U2fView* u2f_view_alloc();
+
+void u2f_view_free(U2fView* u2f);
+
+View* u2f_view_get_view(U2fView* u2f);
+
+void u2f_view_set_ok_callback(U2fView* u2f, U2fOkCallback callback, void* context);
+
+void u2f_view_set_state(U2fView* u2f, U2fViewMsg msg);