Momentum-Apps/scenes/esubghz_chat_key_menu.c

#include "../esubghz_chat_i.h"

typedef enum {
	ESubGhzChatKeyMenuItems_NoEncryption,
	ESubGhzChatKeyMenuItems_Password,
	ESubGhzChatKeyMenuItems_HexKey,
	ESubGhzChatKeyMenuItems_GenKey,
	ESubGhzChatKeyMenuItems_ReadKeyFromNfc,
} ESubGhzChatKeyMenuItems;

static void key_menu_cb(void* context, uint32_t index)
{
	furi_assert(context);
	ESubGhzChatState* state = context;

	uint8_t key[KEY_BITS / 8];

	switch(index) {
	case ESubGhzChatKeyMenuItems_NoEncryption:
		state->encrypted = false;

		view_dispatcher_send_custom_event(state->view_dispatcher,
				ESubGhzChatEvent_KeyMenuNoEncryption);
		break;

	case ESubGhzChatKeyMenuItems_Password:
		view_dispatcher_send_custom_event(state->view_dispatcher,
				ESubGhzChatEvent_KeyMenuPassword);
		break;

	case ESubGhzChatKeyMenuItems_HexKey:
		view_dispatcher_send_custom_event(state->view_dispatcher,
				ESubGhzChatEvent_KeyMenuHexKey);
		break;

	case ESubGhzChatKeyMenuItems_GenKey:
		/* generate a random key */
		furi_hal_random_fill_buf(key, KEY_BITS / 8);

		/* initiate the crypto context */
		bool ret = crypto_ctx_set_key(state->crypto_ctx, key,
				state->name_prefix, furi_get_tick());

		/* cleanup */
		crypto_explicit_bzero(key, sizeof(key));

		if (!ret) {
			crypto_ctx_clear(state->crypto_ctx);
			return;
		}

		/* set encrypted flag and enter the chat */
		state->encrypted = true;

		view_dispatcher_send_custom_event(state->view_dispatcher,
				ESubGhzChatEvent_KeyMenuGenKey);
		break;

	case ESubGhzChatKeyMenuItems_ReadKeyFromNfc:
		view_dispatcher_send_custom_event(state->view_dispatcher,
				ESubGhzChatEvent_KeyMenuReadKeyFromNfc);
		break;

	default:
		break;
	}
}

/* Prepares the key menu scene. */
void scene_on_enter_key_menu(void* context)
{
	FURI_LOG_T(APPLICATION_NAME, "scene_on_enter_key_menu");

	furi_assert(context);
	ESubGhzChatState* state = context;

	menu_reset(state->menu);

	/* clear the crypto CTX in case we got back from password or hex key
	 * input */
	crypto_ctx_clear(state->crypto_ctx);

	menu_add_item(
		state->menu,
		"No encryption",
		&I_chat_14px,
		ESubGhzChatKeyMenuItems_NoEncryption,
		key_menu_cb,
		state
	);
	menu_add_item(
		state->menu,
		"Password",
		&I_keyboard_14px,
		ESubGhzChatKeyMenuItems_Password,
		key_menu_cb,
		state
	);
	menu_add_item(
		state->menu,
		"Hex Key",
		&I_hex_14px,
		ESubGhzChatKeyMenuItems_HexKey,
		key_menu_cb,
		state
	);
	menu_add_item(
		state->menu,
		"Generate Key",
		&I_u2f_14px,
		ESubGhzChatKeyMenuItems_GenKey,
		key_menu_cb,
		state
	);
	menu_add_item(
		state->menu,
		"Read Key from NFC",
		&I_Nfc_14px,
		ESubGhzChatKeyMenuItems_ReadKeyFromNfc,
		key_menu_cb,
		state
	);

	view_dispatcher_switch_to_view(state->view_dispatcher, ESubGhzChatView_Menu);
}

/* Handles scene manager events for the key menu scene. */
bool scene_on_event_key_menu(void* context, SceneManagerEvent event)
{
	FURI_LOG_T(APPLICATION_NAME, "scene_on_event_key_menu");

	furi_assert(context);
	ESubGhzChatState* state = context;

	bool consumed = false;

	switch(event.type) {
	case SceneManagerEventTypeCustom:
		switch(event.event) {
		/* switch to frequency input scene */
		case ESubGhzChatEvent_KeyMenuNoEncryption:
		case ESubGhzChatEvent_KeyMenuGenKey:
			scene_manager_next_scene(state->scene_manager,
					ESubGhzChatScene_FreqInput);
			consumed = true;
			break;

		/* switch to password input scene */
		case ESubGhzChatEvent_KeyMenuPassword:
			scene_manager_next_scene(state->scene_manager,
					ESubGhzChatScene_PassInput);
			consumed = true;
			break;

		/* switch to hex key input scene */
		case ESubGhzChatEvent_KeyMenuHexKey:
			scene_manager_next_scene(state->scene_manager,
					ESubGhzChatScene_HexKeyInput);
			consumed = true;
			break;

		/* switch to hex key read scene */
		case ESubGhzChatEvent_KeyMenuReadKeyFromNfc:
			scene_manager_next_scene(state->scene_manager,
					ESubGhzChatScene_KeyReadPopup);
			consumed = true;
			break;
		}

		break;

	case SceneManagerEventTypeBack:
		/* stop the application if the user presses back here */
		view_dispatcher_stop(state->view_dispatcher);
		consumed = true;
		break;

	default:
		consumed = false;
		break;
	}

	return consumed;
}

/* Cleans up the key menu scene. */
void scene_on_exit_key_menu(void* context)
{
	FURI_LOG_T(APPLICATION_NAME, "scene_on_exit_key_menu");

	furi_assert(context);
	ESubGhzChatState* state = context;

	menu_reset(state->menu);
}