Momentum-Apps/scenes/esubghz_chat_key_menu.c

#include "../esubghz_chat_i.h"

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

    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);

    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;
        }

        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);
}