Nfc: NTAG password auto capture (and other password-related changes) (#1843)

* nfc: MFUL minor cleanup
* nfc: Add mechanism to pass event data
* nfc: Add NTAG authentication event to emulation
* nfc: Rename enum member to align with existing convention
* nfc: Add function to determine whether MFUL is fully captured
* nfc: Fix emulation of incompletely-read password-protected MFUL
* nfc: Add reader password capture scene
* nfc: Set default MFUL password input to 0xFFFFFFFF
* nfc: Fix MFUL auth counter loading
* nfc: Be explicit about using manual auth method when using auto unlock
* nfc: Fill in MFUL has_auth when loading file
* nfc: Fix MFUL auth success usage, remove unused variable
* nfc: Display PWD and PACK in MFUL info if available
* nfc: Remove unnecessary include
* nfc: Add unlock options to loaded MFUL menu
* nfc: Move set default MFUL password. This way it can be edited if needed instead of reentered
* nfc: Fix unlock menu not maintaining selection index
* nfc: Move captured MFUL auth data from worker to device data
* nfc: Attempt to authenticate with default PWD when possible when reading NTAG
* nfc: Don't try to auth NTAG on read if we already authed
* nfc: Add title for all pages read but failed auth for NTAG auth
* nfc: Add faster auth callback patch
* lib: Remove scons submodule from index
* nfc: Revise MFUL unlock UI flow
* nfc: Disallow MFUL unlock with reader if card not read yet. Trying to read first results in either needing to make a new scene or badly jury rigging other scenes, so let's just not do that
* f7: Bump API symbols
* Format code

Co-authored-by: gornekich <n.gorbadey@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/main/nfc/scenes/nfc_scene_config.h

@@ -21,6 +21,7 @@ ADD_SCENE(nfc, mf_ultralight_emulate, MfUltralightEmulate)
 ADD_SCENE(nfc, mf_ultralight_read_auth, MfUltralightReadAuth)
 ADD_SCENE(nfc, mf_ultralight_read_auth_result, MfUltralightReadAuthResult)
 ADD_SCENE(nfc, mf_ultralight_key_input, MfUltralightKeyInput)
+ADD_SCENE(nfc, mf_ultralight_unlock_auto, MfUltralightUnlockAuto)
 ADD_SCENE(nfc, mf_ultralight_unlock_menu, MfUltralightUnlockMenu)
 ADD_SCENE(nfc, mf_ultralight_unlock_warn, MfUltralightUnlockWarn)
 ADD_SCENE(nfc, mf_desfire_read_success, MfDesfireReadSuccess)

applications/main/nfc/scenes/nfc_scene_mf_ultralight_menu.c

@@ -19,10 +19,10 @@ void nfc_scene_mf_ultralight_menu_on_enter(void* context) {
     Submenu* submenu = nfc->submenu;
     MfUltralightData* data = &nfc->dev->dev_data.mf_ul_data;
 
-    if(data->data_read != data->data_size) {
+    if(!mf_ul_is_full_capture(data)) {
         submenu_add_item(
             submenu,
-            "Unlock With Password",
+            "Unlock",
             SubmenuIndexUnlock,
             nfc_scene_mf_ultralight_menu_submenu_callback,
             nfc);

applications/main/nfc/scenes/nfc_scene_mf_ultralight_read_auth.c

@@ -24,25 +24,29 @@ void nfc_scene_mf_ultralight_read_auth_set_state(Nfc* nfc, NfcSceneMfUlReadState
     if(curr_state != state) {
         if(state == NfcSceneMfUlReadStateDetecting) {
             popup_reset(nfc->popup);
-            popup_set_text(
-                nfc->popup, "Apply card to\nFlipper's back", 97, 24, AlignCenter, AlignTop);
+            popup_set_text(nfc->popup, "Apply the\ntarget card", 97, 24, AlignCenter, AlignTop);
             popup_set_icon(nfc->popup, 0, 8, &I_NFC_manual_60x50);
+            nfc_blink_read_start(nfc);
         } else if(state == NfcSceneMfUlReadStateReading) {
             popup_reset(nfc->popup);
             popup_set_header(
                 nfc->popup, "Reading card\nDon't move...", 85, 24, AlignCenter, AlignTop);
             popup_set_icon(nfc->popup, 12, 23, &A_Loading_24);
+            nfc_blink_detect_start(nfc);
         } else if(state == NfcSceneMfUlReadStateNotSupportedCard) {
             popup_reset(nfc->popup);
             popup_set_header(nfc->popup, "Wrong type of card!", 64, 3, AlignCenter, AlignTop);
             popup_set_text(
                 nfc->popup,
-                "Only MIFARE\nUltralight & NTAG\n are supported",
+                "Only MIFARE\nUltralight & NTAG\nare supported",
                 4,
                 22,
                 AlignLeft,
                 AlignTop);
             popup_set_icon(nfc->popup, 73, 20, &I_DolphinCommon_56x48);
+            nfc_blink_stop(nfc);
+            notification_message(nfc->notifications, &sequence_error);
+            notification_message(nfc->notifications, &sequence_set_red_255);
         }
         scene_manager_set_scene_state(nfc->scene_manager, NfcSceneMfUltralightReadAuth, state);
     }
@@ -62,8 +66,6 @@ void nfc_scene_mf_ultralight_read_auth_on_enter(void* context) {
         &nfc->dev->dev_data,
         nfc_scene_mf_ultralight_read_auth_worker_callback,
         nfc);
-
-    nfc_blink_read_start(nfc);
 }
 
 bool nfc_scene_mf_ultralight_read_auth_on_event(void* context, SceneManagerEvent event) {
@@ -86,8 +88,17 @@ bool nfc_scene_mf_ultralight_read_auth_on_event(void* context, SceneManagerEvent
                 nfc, NfcSceneMfUlReadStateNotSupportedCard);
         }
     } else if(event.type == SceneManagerEventTypeBack) {
-        consumed = scene_manager_search_and_switch_to_previous_scene(
-            nfc->scene_manager, NfcSceneMfUltralightUnlockMenu);
+        MfUltralightData* mf_ul_data = &nfc->dev->dev_data.mf_ul_data;
+        NfcScene next_scene;
+        if(mf_ul_data->auth_method == MfUltralightAuthMethodManual) {
+            next_scene = NfcSceneMfUltralightKeyInput;
+        } else if(mf_ul_data->auth_method == MfUltralightAuthMethodAuto) {
+            next_scene = NfcSceneMfUltralightUnlockAuto;
+        } else {
+            next_scene = NfcSceneMfUltralightUnlockMenu;
+        }
+        consumed =
+            scene_manager_search_and_switch_to_previous_scene(nfc->scene_manager, next_scene);
     }
     return consumed;
 }

applications/main/nfc/scenes/nfc_scene_mf_ultralight_read_auth_result.c

@@ -19,16 +19,20 @@ void nfc_scene_mf_ultralight_read_auth_result_on_enter(void* context) {
     MfUltralightData* mf_ul_data = &nfc->dev->dev_data.mf_ul_data;
     MfUltralightConfigPages* config_pages = mf_ultralight_get_config_pages(mf_ul_data);
     Widget* widget = nfc->widget;
+    const char* title;
     FuriString* temp_str;
     temp_str = furi_string_alloc();
 
     if((mf_ul_data->data_read == mf_ul_data->data_size) && (mf_ul_data->data_read > 0)) {
-        widget_add_string_element(
-            widget, 64, 0, AlignCenter, AlignTop, FontPrimary, "All pages are unlocked!");
+        if(mf_ul_data->auth_success) {
+            title = "All pages are unlocked!";
+        } else {
+            title = "All unlocked but failed auth!";
+        }
     } else {
-        widget_add_string_element(
-            widget, 64, 0, AlignCenter, AlignTop, FontPrimary, "Not all pages unlocked!");
+        title = "Not all pages unlocked!";
     }
+    widget_add_string_element(widget, 64, 0, AlignCenter, AlignTop, FontPrimary, title);
     furi_string_set(temp_str, "UID:");
     for(size_t i = 0; i < nfc_data->uid_len; i++) {
         furi_string_cat_printf(temp_str, " %02X", nfc_data->uid[i]);
@@ -65,6 +69,7 @@ void nfc_scene_mf_ultralight_read_auth_result_on_enter(void* context) {
         nfc);
 
     furi_string_free(temp_str);
+    notification_message(nfc->notifications, &sequence_set_green_255);
     view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewWidget);
 }
 
@@ -81,8 +86,21 @@ bool nfc_scene_mf_ultralight_read_auth_result_on_event(void* context, SceneManag
             consumed = true;
         }
     } else if(event.type == SceneManagerEventTypeBack) {
-        consumed = scene_manager_search_and_switch_to_previous_scene(
-            nfc->scene_manager, NfcSceneMfUltralightUnlockMenu);
+        MfUltralightData* mf_ul_data = &nfc->dev->dev_data.mf_ul_data;
+        if(mf_ul_data->auth_method == MfUltralightAuthMethodManual ||
+           mf_ul_data->auth_method == MfUltralightAuthMethodAuto) {
+            consumed = scene_manager_previous_scene(nfc->scene_manager);
+        } else {
+            NfcScene next_scene;
+            if((mf_ul_data->data_read == mf_ul_data->data_size) && (mf_ul_data->data_read > 0)) {
+                next_scene = NfcSceneMfUltralightMenu;
+            } else {
+                next_scene = NfcSceneMfUltralightUnlockMenu;
+            }
+
+            consumed =
+                scene_manager_search_and_switch_to_previous_scene(nfc->scene_manager, next_scene);
+        }
     }
 
     return consumed;
@@ -93,4 +111,6 @@ void nfc_scene_mf_ultralight_read_auth_result_on_exit(void* context) {
 
     // Clean views
     widget_reset(nfc->widget);
+
+    notification_message_block(nfc->notifications, &sequence_reset_green);
 }

applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_auto.c

@@ -0,0 +1,64 @@
+#include "../nfc_i.h"
+
+bool nfc_scene_mf_ultralight_unlock_auto_worker_callback(NfcWorkerEvent event, void* context) {
+    Nfc* nfc = context;
+
+    view_dispatcher_send_custom_event(nfc->view_dispatcher, event);
+    return true;
+}
+
+void nfc_scene_mf_ultralight_unlock_auto_on_enter(void* context) {
+    Nfc* nfc = context;
+
+    // Setup view
+    widget_add_string_multiline_element(
+        nfc->widget,
+        54,
+        30,
+        AlignLeft,
+        AlignCenter,
+        FontPrimary,
+        "Touch the\nreader to get\npassword...");
+    widget_add_icon_element(nfc->widget, 0, 15, &I_Modern_reader_18x34);
+    widget_add_icon_element(nfc->widget, 20, 12, &I_Move_flipper_26x39);
+    view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewWidget);
+
+    // Start worker
+    nfc_worker_start(
+        nfc->worker,
+        NfcWorkerStateMfUltralightEmulate,
+        &nfc->dev->dev_data,
+        nfc_scene_mf_ultralight_unlock_auto_worker_callback,
+        nfc);
+
+    nfc_blink_read_start(nfc);
+}
+
+bool nfc_scene_mf_ultralight_unlock_auto_on_event(void* context, SceneManagerEvent event) {
+    Nfc* nfc = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        if((event.event == NfcWorkerEventMfUltralightPwdAuth)) {
+            MfUltralightAuth* auth = &nfc->dev->dev_data.mf_ul_auth;
+            memcpy(nfc->byte_input_store, auth->pwd.raw, sizeof(auth->pwd.raw));
+            nfc->dev->dev_data.mf_ul_data.auth_method = MfUltralightAuthMethodAuto;
+            nfc_worker_stop(nfc->worker);
+            notification_message(nfc->notifications, &sequence_success);
+            scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightUnlockWarn);
+            consumed = true;
+        }
+    }
+    return consumed;
+}
+
+void nfc_scene_mf_ultralight_unlock_auto_on_exit(void* context) {
+    Nfc* nfc = context;
+
+    // Stop worker
+    nfc_worker_stop(nfc->worker);
+    // Clear view
+    widget_reset(nfc->widget);
+
+    nfc_blink_stop(nfc);
+}

applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_menu.c

@@ -1,9 +1,10 @@
 #include "../nfc_i.h"
 
 enum SubmenuIndex {
-    SubmenuIndexMfUlUnlockMenuManual,
+    SubmenuIndexMfUlUnlockMenuAuto,
     SubmenuIndexMfUlUnlockMenuAmeebo,
     SubmenuIndexMfUlUnlockMenuXiaomi,
+    SubmenuIndexMfUlUnlockMenuManual,
 };
 
 void nfc_scene_mf_ultralight_unlock_menu_submenu_callback(void* context, uint32_t index) {
@@ -18,12 +19,14 @@ void nfc_scene_mf_ultralight_unlock_menu_on_enter(void* context) {
 
     uint32_t state =
         scene_manager_get_scene_state(nfc->scene_manager, NfcSceneMfUltralightUnlockMenu);
-    submenu_add_item(
-        submenu,
-        "Enter Password Manually",
-        SubmenuIndexMfUlUnlockMenuManual,
-        nfc_scene_mf_ultralight_unlock_menu_submenu_callback,
-        nfc);
+    if(nfc->dev->dev_data.protocol == NfcDeviceProtocolMifareUl) {
+        submenu_add_item(
+            submenu,
+            "Unlock With Reader",
+            SubmenuIndexMfUlUnlockMenuAuto,
+            nfc_scene_mf_ultralight_unlock_menu_submenu_callback,
+            nfc);
+    }
     submenu_add_item(
         submenu,
         "Auth As Ameebo",
@@ -32,10 +35,16 @@ void nfc_scene_mf_ultralight_unlock_menu_on_enter(void* context) {
         nfc);
     submenu_add_item(
         submenu,
-        "Auth As Xiaomi",
+        "Auth As Xiaomi Air Purifier",
         SubmenuIndexMfUlUnlockMenuXiaomi,
         nfc_scene_mf_ultralight_unlock_menu_submenu_callback,
         nfc);
+    submenu_add_item(
+        submenu,
+        "Enter Password Manually",
+        SubmenuIndexMfUlUnlockMenuManual,
+        nfc_scene_mf_ultralight_unlock_menu_submenu_callback,
+        nfc);
     submenu_set_selected_item(submenu, state);
     view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewMenu);
 }
@@ -57,8 +66,12 @@ bool nfc_scene_mf_ultralight_unlock_menu_on_event(void* context, SceneManagerEve
             nfc->dev->dev_data.mf_ul_data.auth_method = MfUltralightAuthMethodXiaomi;
             scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightUnlockWarn);
             consumed = true;
+        } else if(event.event == SubmenuIndexMfUlUnlockMenuAuto) {
+            scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightUnlockAuto);
+            consumed = true;
         }
-        scene_manager_set_scene_state(nfc->scene_manager, NfcSceneExtraActions, event.event);
+        scene_manager_set_scene_state(
+            nfc->scene_manager, NfcSceneMfUltralightUnlockMenu, event.event);
     }
     return consumed;
 }

applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_warn.c

@@ -10,15 +10,43 @@ void nfc_scene_mf_ultralight_unlock_warn_dialog_callback(DialogExResult result,
 void nfc_scene_mf_ultralight_unlock_warn_on_enter(void* context) {
     Nfc* nfc = context;
     DialogEx* dialog_ex = nfc->dialog_ex;
+    MfUltralightAuthMethod auth_method = nfc->dev->dev_data.mf_ul_data.auth_method;
 
     dialog_ex_set_context(dialog_ex, nfc);
     dialog_ex_set_result_callback(dialog_ex, nfc_scene_mf_ultralight_unlock_warn_dialog_callback);
 
-    dialog_ex_set_header(dialog_ex, "Risky function!", 64, 4, AlignCenter, AlignTop);
-    dialog_ex_set_text(
-        dialog_ex, "Wrong password\ncan block your\ncard.", 4, 18, AlignLeft, AlignTop);
-    dialog_ex_set_icon(dialog_ex, 73, 20, &I_DolphinCommon_56x48);
-    dialog_ex_set_center_button_text(dialog_ex, "OK");
+    if(auth_method == MfUltralightAuthMethodManual || auth_method == MfUltralightAuthMethodAuto) {
+        // Build dialog text
+        MfUltralightAuth* auth = &nfc->dev->dev_data.mf_ul_auth;
+        FuriString* password_str =
+            furi_string_alloc_set_str("Try to unlock the card with\npassword: ");
+        for(size_t i = 0; i < sizeof(auth->pwd.raw); ++i) {
+            furi_string_cat_printf(password_str, "%02X ", nfc->byte_input_store[i]);
+        }
+        furi_string_cat_str(password_str, "?\nCaution, a wrong password\ncan block the card!");
+        nfc_text_store_set(nfc, furi_string_get_cstr(password_str));
+        furi_string_free(password_str);
+
+        dialog_ex_set_header(
+            dialog_ex,
+            auth_method == MfUltralightAuthMethodAuto ? "Password captured!" : "Risky function!",
+            64,
+            0,
+            AlignCenter,
+            AlignTop);
+        dialog_ex_set_text(dialog_ex, nfc->text_store, 64, 12, AlignCenter, AlignTop);
+        dialog_ex_set_left_button_text(dialog_ex, "Cancel");
+        dialog_ex_set_right_button_text(dialog_ex, "Continue");
+
+        if(auth_method == MfUltralightAuthMethodAuto)
+            notification_message(nfc->notifications, &sequence_set_green_255);
+    } else {
+        dialog_ex_set_header(dialog_ex, "Risky function!", 64, 4, AlignCenter, AlignTop);
+        dialog_ex_set_text(
+            dialog_ex, "Wrong password\ncan block your\ncard.", 4, 18, AlignLeft, AlignTop);
+        dialog_ex_set_icon(dialog_ex, 73, 20, &I_DolphinCommon_56x48);
+        dialog_ex_set_center_button_text(dialog_ex, "OK");
+    }
 
     view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewDialogEx);
 }
@@ -28,12 +56,33 @@ bool nfc_scene_mf_ultralight_unlock_warn_on_event(void* context, SceneManagerEve
 
     bool consumed = false;
 
-    if(event.type == SceneManagerEventTypeCustom) {
-        if(event.event == DialogExResultCenter) {
-            scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightReadAuth);
-            DOLPHIN_DEED(DolphinDeedNfcRead);
+    MfUltralightAuthMethod auth_method = nfc->dev->dev_data.mf_ul_data.auth_method;
+    if(auth_method == MfUltralightAuthMethodManual || auth_method == MfUltralightAuthMethodAuto) {
+        if(event.type == SceneManagerEventTypeCustom) {
+            if(event.event == DialogExResultRight) {
+                scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightReadAuth);
+                DOLPHIN_DEED(DolphinDeedNfcRead);
+                consumed = true;
+            } else if(event.event == DialogExResultLeft) {
+                if(auth_method == MfUltralightAuthMethodAuto) {
+                    consumed = scene_manager_search_and_switch_to_previous_scene(
+                        nfc->scene_manager, NfcSceneMfUltralightUnlockMenu);
+                } else {
+                    consumed = scene_manager_previous_scene(nfc->scene_manager);
+                }
+            }
+        } else if(event.type == SceneManagerEventTypeBack) {
+            // Cannot press back
             consumed = true;
         }
+    } else {
+        if(event.type == SceneManagerEventTypeCustom) {
+            if(event.event == DialogExResultCenter) {
+                scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightReadAuth);
+                DOLPHIN_DEED(DolphinDeedNfcRead);
+                consumed = true;
+            }
+        }
     }
 
     return consumed;
@@ -43,5 +92,7 @@ void nfc_scene_mf_ultralight_unlock_warn_on_exit(void* context) {
     Nfc* nfc = context;
 
     dialog_ex_reset(nfc->dialog_ex);
-    submenu_reset(nfc->submenu);
+    nfc_text_store_clear(nfc);
+
+    notification_message_block(nfc->notifications, &sequence_reset_green);
 }

applications/main/nfc/scenes/nfc_scene_nfc_data_info.c

@@ -87,6 +87,20 @@ void nfc_scene_nfc_data_info_on_enter(void* context) {
             temp_str, "\nPages Read %d/%d", data->data_read / 4, data->data_size / 4);
         if(data->data_size > data->data_read) {
             furi_string_cat_printf(temp_str, "\nPassword-protected");
+        } else if(data->auth_success) {
+            MfUltralightConfigPages* config_pages = mf_ultralight_get_config_pages(data);
+            furi_string_cat_printf(
+                temp_str,
+                "\nPassword: %02X %02X %02X %02X",
+                config_pages->auth_data.pwd.raw[0],
+                config_pages->auth_data.pwd.raw[1],
+                config_pages->auth_data.pwd.raw[2],
+                config_pages->auth_data.pwd.raw[3]);
+            furi_string_cat_printf(
+                temp_str,
+                "\nPACK: %02X %02X",
+                config_pages->auth_data.pack.raw[0],
+                config_pages->auth_data.pack.raw[1]);
         }
     } else if(protocol == NfcDeviceProtocolMifareClassic) {
         MfClassicData* data = &dev_data->mf_classic_data;

applications/main/nfc/scenes/nfc_scene_read.c

@@ -70,6 +70,8 @@ bool nfc_scene_read_on_event(void* context, SceneManagerEvent event) {
             consumed = true;
         } else if(event.event == NfcWorkerEventReadMfUltralight) {
             notification_message(nfc->notifications, &sequence_success);
+            // Set unlock password input to 0xFFFFFFFF only on fresh read
+            memset(nfc->byte_input_store, 0xFF, 4);
             scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightReadSuccess);
             DOLPHIN_DEED(DolphinDeedNfcReadSuccess);
             consumed = true;

applications/main/nfc/scenes/nfc_scene_saved_menu.c

@@ -11,6 +11,8 @@ enum SubmenuIndex {
     SubmenuIndexDelete,
     SubmenuIndexInfo,
     SubmenuIndexRestoreOriginal,
+    SubmenuIndexMfUlUnlockByReader,
+    SubmenuIndexMfUlUnlockByPassword,
 };
 
 void nfc_scene_saved_menu_submenu_callback(void* context, uint32_t index) {
@@ -69,6 +71,21 @@ void nfc_scene_saved_menu_on_enter(void* context) {
     }
     submenu_add_item(
         submenu, "Info", SubmenuIndexInfo, nfc_scene_saved_menu_submenu_callback, nfc);
+    if(nfc->dev->format == NfcDeviceSaveFormatMifareUl &&
+       !mf_ul_is_full_capture(&nfc->dev->dev_data.mf_ul_data)) {
+        submenu_add_item(
+            submenu,
+            "Unlock With Reader",
+            SubmenuIndexMfUlUnlockByReader,
+            nfc_scene_saved_menu_submenu_callback,
+            nfc);
+        submenu_add_item(
+            submenu,
+            "Unlock With Password",
+            SubmenuIndexMfUlUnlockByPassword,
+            nfc_scene_saved_menu_submenu_callback,
+            nfc);
+    }
     if(nfc->dev->shadow_file_exist) {
         submenu_add_item(
             submenu,
@@ -141,6 +158,12 @@ bool nfc_scene_saved_menu_on_event(void* context, SceneManagerEvent event) {
         } else if(event.event == SubmenuIndexRestoreOriginal) {
             scene_manager_next_scene(nfc->scene_manager, NfcSceneRestoreOriginalConfirm);
             consumed = true;
+        } else if(event.event == SubmenuIndexMfUlUnlockByReader) {
+            scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightUnlockAuto);
+            consumed = true;
+        } else if(event.event == SubmenuIndexMfUlUnlockByPassword) {
+            scene_manager_next_scene(nfc->scene_manager, NfcSceneMfUltralightUnlockMenu);
+            consumed = true;
         }
     }