Add an option to automatically generate a key

esubghz_chat_i.h

@@ -80,6 +80,7 @@ typedef enum {
 	ESubGhzChatEvent_KeyMenuNoEncryption,
 	ESubGhzChatEvent_KeyMenuPassword,
 	ESubGhzChatEvent_KeyMenuHexKey,
+	ESubGhzChatEvent_KeyMenuGenKey,
 	ESubGhzChatEvent_PassEntered,
 	ESubGhzChatEvent_HexKeyEntered,
 	ESubGhzChatEvent_MsgEntered,

scenes/esubghz_chat_key_menu.c

@@ -4,6 +4,7 @@ typedef enum {
 	ESubGhzChatKeyMenuItems_NoEncryption,
 	ESubGhzChatKeyMenuItems_Password,
 	ESubGhzChatKeyMenuItems_HexKey,
+	ESubGhzChatKeyMenuItems_GenKey,
 } ESubGhzChatKeyMenuItems;
 
 static void key_menu_cb(void* context, uint32_t index)
@@ -11,6 +12,8 @@ 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;
@@ -30,6 +33,29 @@ static void key_menu_cb(void* context, uint32_t index)
 				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);
+
+		/* 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;
+		enter_chat(state);
+
+		scene_manager_handle_custom_event(state->scene_manager,
+				ESubGhzChatEvent_KeyMenuGenKey);
+		break;
+
 	default:
 		break;
 	}
@@ -69,6 +95,14 @@ void scene_on_enter_key_menu(void* context)
 		key_menu_cb,
 		state
 	);
+	menu_add_item(
+		state->menu,
+		"Generate Key",
+		NULL,
+		ESubGhzChatKeyMenuItems_GenKey,
+		key_menu_cb,
+		state
+	);
 
 	view_dispatcher_switch_to_view(state->view_dispatcher, ESubGhzChatView_Menu);
 }
@@ -88,6 +122,7 @@ bool scene_on_event_key_menu(void* context, SceneManagerEvent event)
 		switch(event.event) {
 		/* switch to message input scene */
 		case ESubGhzChatEvent_KeyMenuNoEncryption:
+		case ESubGhzChatEvent_KeyMenuGenKey:
 			scene_manager_next_scene(state->scene_manager,
 					ESubGhzChatScene_ChatInput);
 			consumed = true;
@@ -107,6 +142,7 @@ bool scene_on_event_key_menu(void* context, SceneManagerEvent event)
 			consumed = true;
 			break;
 		}
+
 		break;
 
 	case SceneManagerEventTypeBack: