Picopass: factory key support, app rename and move to NFC category, minor code cleanup (#2417)

* message on successful card write
* auth using factory key
* auth using factory default
* factory default screen
* write standard iclass key
* pass block explicitly
* Fix array indexing, add empty detection
* PicoPass: rename app and move to NFC group, minor code cleanup

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

applications/plugins/picopass/application.fam

@@ -1,6 +1,6 @@
 App(
     appid="picopass",
-    name="PicoPass Reader",
+    name="PicoPass",
     apptype=FlipperAppType.EXTERNAL,
     targets=["f7"],
     entry_point="picopass_app",
@@ -11,7 +11,7 @@ App(
     stack_size=4 * 1024,
     order=30,
     fap_icon="125_10px.png",
-    fap_category="Tools",
+    fap_category="NFC",
     fap_libs=["mbedtls"],
     fap_private_libs=[
         Lib(

applications/plugins/picopass/picopass.c

@@ -171,6 +171,16 @@ void picopass_show_loading_popup(void* context, bool show) {
     }
 }
 
+bool picopass_is_memset(const uint8_t* data, const uint8_t pattern, size_t size) {
+    bool result = size > 0;
+    while(size > 0) {
+        result &= (*data == pattern);
+        data++;
+        size--;
+    }
+    return result;
+}
+
 int32_t picopass_app(void* p) {
     UNUSED(p);
     Picopass* picopass = picopass_alloc();

applications/plugins/picopass/picopass_device.c

@@ -368,7 +368,7 @@ ReturnCode picopass_device_parse_wiegand(uint8_t* data, PicopassWiegandRecord* r
 
         record->CardNumber = (bot >> 1) & 0xFFFF;
         record->FacilityCode = (bot >> 17) & 0xFF;
-        FURI_LOG_D(TAG, "FC:%u CN: %u\n", record->FacilityCode, record->CardNumber);
+        FURI_LOG_D(TAG, "FC: %u CN: %u", record->FacilityCode, record->CardNumber);
         record->valid = true;
     } else {
         record->CardNumber = 0;

applications/plugins/picopass/picopass_device.h

@@ -22,6 +22,7 @@
 #define PICOPASS_KD_BLOCK_INDEX 3
 #define PICOPASS_KC_BLOCK_INDEX 4
 #define PICOPASS_AIA_BLOCK_INDEX 5
+#define PICOPASS_PACS_CFG_BLOCK_INDEX 6
 
 #define PICOPASS_APP_FOLDER ANY_PATH("picopass")
 #define PICOPASS_APP_EXTENSION ".picopass"

applications/plugins/picopass/picopass_i.h

@@ -81,3 +81,15 @@ void picopass_blink_start(Picopass* picopass);
 void picopass_blink_stop(Picopass* picopass);
 
 void picopass_show_loading_popup(void* context, bool show);
+
+/** Check if memory is set to pattern
+ *
+ * @warning    zero size will return false
+ *
+ * @param[in]  data     Pointer to the byte array
+ * @param[in]  pattern  The pattern
+ * @param[in]  size     The byte array size
+ *
+ * @return     True if memory is set to pattern, false otherwise
+ */
+bool picopass_is_memset(const uint8_t* data, const uint8_t pattern, size_t size);

applications/plugins/picopass/picopass_worker.c

@@ -5,7 +5,8 @@
 #define TAG "PicopassWorker"
 
 const uint8_t picopass_iclass_key[] = {0xaf, 0xa7, 0x85, 0xa7, 0xda, 0xb3, 0x33, 0x78};
-const uint8_t picopass_factory_key[] = {0x76, 0x65, 0x54, 0x43, 0x32, 0x21, 0x10, 0x00};
+const uint8_t picopass_factory_credit_key[] = {0x76, 0x65, 0x54, 0x43, 0x32, 0x21, 0x10, 0x00};
+const uint8_t picopass_factory_debit_key[] = {0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87};
 
 static void picopass_worker_enable_field() {
     furi_hal_nfc_ll_txrx_on();
@@ -197,6 +198,28 @@ static ReturnCode picopass_auth_standard(uint8_t* csn, uint8_t* div_key) {
     return rfalPicoPassPollerCheck(mac, &chkRes);
 }
 
+static ReturnCode picopass_auth_factory(uint8_t* csn, uint8_t* div_key) {
+    rfalPicoPassReadCheckRes rcRes;
+    rfalPicoPassCheckRes chkRes;
+
+    ReturnCode err;
+
+    uint8_t mac[4] = {0};
+    uint8_t ccnr[12] = {0};
+
+    err = rfalPicoPassPollerReadCheck(&rcRes);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerReadCheck error %d", err);
+        return err;
+    }
+    memcpy(ccnr, rcRes.CCNR, sizeof(rcRes.CCNR)); // last 4 bytes left 0
+
+    loclass_diversifyKey(csn, picopass_factory_debit_key, div_key);
+    loclass_opt_doReaderMAC(ccnr, div_key, mac);
+
+    return rfalPicoPassPollerCheck(mac, &chkRes);
+}
+
 static ReturnCode picopass_auth_dict(
     uint8_t* csn,
     PicopassPacs* pacs,
@@ -264,14 +287,23 @@ static ReturnCode picopass_auth_dict(
 ReturnCode picopass_auth(PicopassBlock* AA1, PicopassPacs* pacs) {
     ReturnCode err;
 
-    FURI_LOG_E(TAG, "Trying standard legacy key");
+    FURI_LOG_I(TAG, "Trying standard legacy key");
     err = picopass_auth_standard(
         AA1[PICOPASS_CSN_BLOCK_INDEX].data, AA1[PICOPASS_KD_BLOCK_INDEX].data);
     if(err == ERR_NONE) {
+        memcpy(pacs->key, picopass_iclass_key, PICOPASS_BLOCK_LEN);
         return ERR_NONE;
     }
 
-    FURI_LOG_E(TAG, "Starting user dictionary attack");
+    FURI_LOG_I(TAG, "Trying factory default key");
+    err = picopass_auth_factory(
+        AA1[PICOPASS_CSN_BLOCK_INDEX].data, AA1[PICOPASS_KD_BLOCK_INDEX].data);
+    if(err == ERR_NONE) {
+        memcpy(pacs->key, picopass_factory_debit_key, PICOPASS_BLOCK_LEN);
+        return ERR_NONE;
+    }
+
+    FURI_LOG_I(TAG, "Starting user dictionary attack");
     err = picopass_auth_dict(
         AA1[PICOPASS_CSN_BLOCK_INDEX].data,
         pacs,
@@ -281,7 +313,7 @@ ReturnCode picopass_auth(PicopassBlock* AA1, PicopassPacs* pacs) {
         return ERR_NONE;
     }
 
-    FURI_LOG_E(TAG, "Starting in-built dictionary attack");
+    FURI_LOG_I(TAG, "Starting system dictionary attack");
     err = picopass_auth_dict(
         AA1[PICOPASS_CSN_BLOCK_INDEX].data,
         pacs,
@@ -406,6 +438,84 @@ ReturnCode picopass_write_card(PicopassBlock* AA1) {
     return ERR_NONE;
 }
 
+ReturnCode picopass_write_block(PicopassPacs* pacs, uint8_t blockNo, uint8_t* newBlock) {
+    rfalPicoPassIdentifyRes idRes;
+    rfalPicoPassSelectRes selRes;
+    rfalPicoPassReadCheckRes rcRes;
+    rfalPicoPassCheckRes chkRes;
+
+    ReturnCode err;
+
+    uint8_t div_key[8] = {0};
+    uint8_t mac[4] = {0};
+    uint8_t ccnr[12] = {0};
+
+    err = rfalPicoPassPollerIdentify(&idRes);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerIdentify error %d", err);
+        return err;
+    }
+
+    err = rfalPicoPassPollerSelect(idRes.CSN, &selRes);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerSelect error %d", err);
+        return err;
+    }
+
+    err = rfalPicoPassPollerReadCheck(&rcRes);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerReadCheck error %d", err);
+        return err;
+    }
+    memcpy(ccnr, rcRes.CCNR, sizeof(rcRes.CCNR)); // last 4 bytes left 0
+
+    loclass_diversifyKey(selRes.CSN, pacs->key, div_key);
+    loclass_opt_doReaderMAC(ccnr, div_key, mac);
+
+    err = rfalPicoPassPollerCheck(mac, &chkRes);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerCheck error %d", err);
+        return err;
+    }
+
+    FURI_LOG_D(TAG, "rfalPicoPassPollerWriteBlock %d", blockNo);
+    uint8_t data[9] = {
+        blockNo,
+        newBlock[0],
+        newBlock[1],
+        newBlock[2],
+        newBlock[3],
+        newBlock[4],
+        newBlock[5],
+        newBlock[6],
+        newBlock[7]};
+    loclass_doMAC_N(data, sizeof(data), div_key, mac);
+    FURI_LOG_D(
+        TAG,
+        "loclass_doMAC_N %d %02x%02x%02x%02x%02x%02x%02x%02x %02x%02x%02x%02x",
+        blockNo,
+        data[1],
+        data[2],
+        data[3],
+        data[4],
+        data[5],
+        data[6],
+        data[7],
+        data[8],
+        mac[0],
+        mac[1],
+        mac[2],
+        mac[3]);
+
+    err = rfalPicoPassPollerWriteBlock(data[0], data + 1, mac);
+    if(err != ERR_NONE) {
+        FURI_LOG_E(TAG, "rfalPicoPassPollerWriteBlock error %d", err);
+        return err;
+    }
+
+    return ERR_NONE;
+}
+
 int32_t picopass_worker_task(void* context) {
     PicopassWorker* picopass_worker = context;
 
@@ -414,6 +524,8 @@ int32_t picopass_worker_task(void* context) {
         picopass_worker_detect(picopass_worker);
     } else if(picopass_worker->state == PicopassWorkerStateWrite) {
         picopass_worker_write(picopass_worker);
+    } else if(picopass_worker->state == PicopassWorkerStateWriteStandardKey) {
+        picopass_worker_write_standard_key(picopass_worker);
     }
     picopass_worker_disable_field(ERR_NONE);
 
@@ -448,7 +560,7 @@ void picopass_worker_detect(PicopassWorker* picopass_worker) {
             }
 
             // Thank you proxmark!
-            pacs->legacy = (memcmp(AA1[5].data, "\xff\xff\xff\xff\xff\xff\xff\xff", 8) == 0);
+            pacs->legacy = picopass_is_memset(AA1[5].data, 0xFF, 8);
             pacs->se_enabled = (memcmp(AA1[5].data, "\xff\xff\xff\x00\x06\xff\xff\xff", 8) == 0);
             if(pacs->se_enabled) {
                 FURI_LOG_D(TAG, "SE enabled");
@@ -520,3 +632,46 @@ void picopass_worker_write(PicopassWorker* picopass_worker) {
         furi_delay_ms(100);
     }
 }
+
+void picopass_worker_write_standard_key(PicopassWorker* picopass_worker) {
+    PicopassDeviceData* dev_data = picopass_worker->dev_data;
+    PicopassBlock* AA1 = dev_data->AA1;
+    PicopassPacs* pacs = &dev_data->pacs;
+    ReturnCode err;
+    PicopassWorkerEvent nextState = PicopassWorkerEventSuccess;
+
+    uint8_t* csn = AA1[PICOPASS_CSN_BLOCK_INDEX].data;
+    uint8_t* configBlock = AA1[PICOPASS_CONFIG_BLOCK_INDEX].data;
+    uint8_t fuses = configBlock[7];
+    uint8_t* oldKey = AA1[PICOPASS_KD_BLOCK_INDEX].data;
+
+    uint8_t newKey[PICOPASS_BLOCK_LEN] = {0};
+    loclass_diversifyKey(csn, picopass_iclass_key, newKey);
+
+    if((fuses & 0x80) == 0x80) {
+        FURI_LOG_D(TAG, "Plain write for personalized mode key change");
+    } else {
+        FURI_LOG_D(TAG, "XOR write for application mode key change");
+        // XOR when in application mode
+        for(size_t i = 0; i < PICOPASS_BLOCK_LEN; i++) {
+            newKey[i] ^= oldKey[i];
+        }
+    }
+
+    while(picopass_worker->state == PicopassWorkerStateWriteStandardKey) {
+        if(picopass_detect_card(1000) == ERR_NONE) {
+            err = picopass_write_block(pacs, PICOPASS_KD_BLOCK_INDEX, newKey);
+            if(err != ERR_NONE) {
+                FURI_LOG_E(TAG, "picopass_write_block error %d", err);
+                nextState = PicopassWorkerEventFail;
+            }
+
+            // Notify caller and exit
+            if(picopass_worker->callback) {
+                picopass_worker->callback(nextState, picopass_worker->context);
+            }
+            break;
+        }
+        furi_delay_ms(100);
+    }
+}

applications/plugins/picopass/picopass_worker.h

@@ -12,6 +12,7 @@ typedef enum {
     // Main worker states
     PicopassWorkerStateDetect,
     PicopassWorkerStateWrite,
+    PicopassWorkerStateWriteStandardKey,
     // Transition
     PicopassWorkerStateStop,
 } PicopassWorkerState;

applications/plugins/picopass/picopass_worker_i.h

@@ -31,3 +31,4 @@ int32_t picopass_worker_task(void* context);
 
 void picopass_worker_detect(PicopassWorker* picopass_worker);
 void picopass_worker_write(PicopassWorker* picopass_worker);
+void picopass_worker_write_standard_key(PicopassWorker* picopass_worker);

applications/plugins/picopass/scenes/picopass_scene_config.h

@@ -11,3 +11,5 @@ ADD_SCENE(picopass, delete, Delete)
 ADD_SCENE(picopass, delete_success, DeleteSuccess)
 ADD_SCENE(picopass, write_card, WriteCard)
 ADD_SCENE(picopass, write_card_success, WriteCardSuccess)
+ADD_SCENE(picopass, read_factory_success, ReadFactorySuccess)
+ADD_SCENE(picopass, write_key, WriteKey)

applications/plugins/picopass/scenes/picopass_scene_read_card.c

@@ -1,6 +1,8 @@
 #include "../picopass_i.h"
 #include <dolphin/dolphin.h>
 
+const uint8_t picopass_factory_key_check[] = {0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87};
+
 void picopass_read_card_worker_callback(PicopassWorkerEvent event, void* context) {
     UNUSED(event);
     Picopass* picopass = context;
@@ -34,7 +36,14 @@ bool picopass_scene_read_card_on_event(void* context, SceneManagerEvent event) {
 
     if(event.type == SceneManagerEventTypeCustom) {
         if(event.event == PicopassCustomEventWorkerExit) {
+            if(memcmp(
+                   picopass->dev->dev_data.pacs.key,
+                   picopass_factory_key_check,
+                   PICOPASS_BLOCK_LEN) == 0) {
+                scene_manager_next_scene(picopass->scene_manager, PicopassSceneReadFactorySuccess);
+            } else {
                 scene_manager_next_scene(picopass->scene_manager, PicopassSceneReadCardSuccess);
+            }
             consumed = true;
         }
     }

applications/plugins/picopass/scenes/picopass_scene_read_card_success.c

@@ -15,6 +15,7 @@ void picopass_scene_read_card_success_widget_callback(
 
 void picopass_scene_read_card_success_on_enter(void* context) {
     Picopass* picopass = context;
+
     FuriString* csn_str = furi_string_alloc_set("CSN:");
     FuriString* credential_str = furi_string_alloc();
     FuriString* wiegand_str = furi_string_alloc();
@@ -30,27 +31,31 @@ void picopass_scene_read_card_success_on_enter(void* context) {
     PicopassPacs* pacs = &picopass->dev->dev_data.pacs;
     Widget* widget = picopass->widget;
 
-    uint8_t csn[PICOPASS_BLOCK_LEN];
+    uint8_t csn[PICOPASS_BLOCK_LEN] = {0};
-    memcpy(csn, &AA1->data[PICOPASS_CSN_BLOCK_INDEX], PICOPASS_BLOCK_LEN);
+    memcpy(csn, AA1[PICOPASS_CSN_BLOCK_INDEX].data, PICOPASS_BLOCK_LEN);
     for(uint8_t i = 0; i < PICOPASS_BLOCK_LEN; i++) {
         furi_string_cat_printf(csn_str, "%02X ", csn[i]);
     }
 
-    // Neither of these are valid.  Indicates the block was all 0x00 or all 0xff
+    bool no_key = picopass_is_memset(pacs->key, 0x00, PICOPASS_BLOCK_LEN);
-    if(pacs->record.bitLength == 0 || pacs->record.bitLength == 255) {
+    bool empty =
+        picopass_is_memset(AA1[PICOPASS_PACS_CFG_BLOCK_INDEX].data, 0xFF, PICOPASS_BLOCK_LEN);
+
+    if(no_key) {
         furi_string_cat_printf(wiegand_str, "Read Failed");
 
         if(pacs->se_enabled) {
             furi_string_cat_printf(credential_str, "SE enabled");
         }
+    } else if(empty) {
+        furi_string_cat_printf(wiegand_str, "Empty");
+    } else if(pacs->record.bitLength == 0 || pacs->record.bitLength == 255) {
+        // Neither of these are valid.  Indicates the block was all 0x00 or all 0xff
+        furi_string_cat_printf(wiegand_str, "Invalid PACS");
 
-        widget_add_button_element(
+        if(pacs->se_enabled) {
-            widget,
+            furi_string_cat_printf(credential_str, "SE enabled");
-            GuiButtonTypeLeft,
+        }
-            "Retry",
-            picopass_scene_read_card_success_widget_callback,
-            picopass);
-
     } else {
         size_t bytesLength = 1 + pacs->record.bitLength / 8;
         furi_string_set(credential_str, "");
@@ -82,13 +87,6 @@ void picopass_scene_read_card_success_on_enter(void* context) {
             }
         }
 
-        widget_add_button_element(
-            widget,
-            GuiButtonTypeLeft,
-            "Retry",
-            picopass_scene_read_card_success_widget_callback,
-            picopass);
-
         widget_add_button_element(
             widget,
             GuiButtonTypeRight,
@@ -97,6 +95,13 @@ void picopass_scene_read_card_success_on_enter(void* context) {
             picopass);
     }
 
+    widget_add_button_element(
+        widget,
+        GuiButtonTypeLeft,
+        "Retry",
+        picopass_scene_read_card_success_widget_callback,
+        picopass);
+
     widget_add_string_element(
         widget, 64, 5, AlignCenter, AlignCenter, FontSecondary, furi_string_get_cstr(csn_str));
     widget_add_string_element(

applications/plugins/picopass/scenes/picopass_scene_read_factory_success.c

@@ -0,0 +1,78 @@
+#include "../picopass_i.h"
+#include <dolphin/dolphin.h>
+
+void picopass_scene_read_factory_success_widget_callback(
+    GuiButtonType result,
+    InputType type,
+    void* context) {
+    furi_assert(context);
+    Picopass* picopass = context;
+
+    if(type == InputTypeShort) {
+        view_dispatcher_send_custom_event(picopass->view_dispatcher, result);
+    }
+}
+
+void picopass_scene_read_factory_success_on_enter(void* context) {
+    Picopass* picopass = context;
+    FuriString* title = furi_string_alloc_set("Factory Default");
+    FuriString* subtitle = furi_string_alloc_set("");
+
+    DOLPHIN_DEED(DolphinDeedNfcReadSuccess);
+
+    // Send notification
+    notification_message(picopass->notifications, &sequence_success);
+
+    // Setup view
+    Widget* widget = picopass->widget;
+    //PicopassPacs* pacs = &picopass->dev->dev_data.pacs;
+    PicopassBlock* AA1 = picopass->dev->dev_data.AA1;
+
+    uint8_t* configBlock = AA1[PICOPASS_CONFIG_BLOCK_INDEX].data;
+    uint8_t fuses = configBlock[7];
+
+    if((fuses & 0x80) == 0x80) {
+        furi_string_cat_printf(subtitle, "Personalization mode");
+    } else {
+        furi_string_cat_printf(subtitle, "Application mode");
+    }
+
+    widget_add_button_element(
+        widget,
+        GuiButtonTypeCenter,
+        "Write Standard iClass Key",
+        picopass_scene_read_factory_success_widget_callback,
+        picopass);
+
+    widget_add_string_element(
+        widget, 64, 5, AlignCenter, AlignCenter, FontSecondary, furi_string_get_cstr(title));
+    widget_add_string_element(
+        widget, 64, 20, AlignCenter, AlignCenter, FontPrimary, furi_string_get_cstr(subtitle));
+
+    furi_string_free(title);
+    furi_string_free(subtitle);
+
+    view_dispatcher_switch_to_view(picopass->view_dispatcher, PicopassViewWidget);
+}
+
+bool picopass_scene_read_factory_success_on_event(void* context, SceneManagerEvent event) {
+    Picopass* picopass = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        if(event.event == GuiButtonTypeLeft) {
+            consumed = scene_manager_previous_scene(picopass->scene_manager);
+        } else if(event.event == GuiButtonTypeCenter) {
+            scene_manager_next_scene(picopass->scene_manager, PicopassSceneWriteKey);
+            consumed = true;
+        }
+    }
+    return consumed;
+}
+
+void picopass_scene_read_factory_success_on_exit(void* context) {
+    Picopass* picopass = context;
+
+    // Clear view
+    widget_reset(picopass->widget);
+}

applications/plugins/picopass/scenes/picopass_scene_write_card_success.c

@@ -16,6 +16,7 @@ void picopass_scene_write_card_success_widget_callback(
 void picopass_scene_write_card_success_on_enter(void* context) {
     Picopass* picopass = context;
     Widget* widget = picopass->widget;
+    FuriString* str = furi_string_alloc_set("Write Success!");
 
     DOLPHIN_DEED(DolphinDeedNfcReadSuccess);
 
@@ -29,6 +30,18 @@ void picopass_scene_write_card_success_on_enter(void* context) {
         picopass_scene_write_card_success_widget_callback,
         picopass);
 
+    widget_add_button_element(
+        widget,
+        GuiButtonTypeRight,
+        "Menu",
+        picopass_scene_write_card_success_widget_callback,
+        picopass);
+
+    widget_add_string_element(
+        widget, 64, 5, AlignCenter, AlignCenter, FontSecondary, furi_string_get_cstr(str));
+
+    furi_string_free(str);
+
     view_dispatcher_switch_to_view(picopass->view_dispatcher, PicopassViewWidget);
 }
 

applications/plugins/picopass/scenes/picopass_scene_write_key.c

@@ -0,0 +1,53 @@
+#include "../picopass_i.h"
+#include <dolphin/dolphin.h>
+
+void picopass_write_key_worker_callback(PicopassWorkerEvent event, void* context) {
+    UNUSED(event);
+    Picopass* picopass = context;
+    view_dispatcher_send_custom_event(picopass->view_dispatcher, PicopassCustomEventWorkerExit);
+}
+
+void picopass_scene_write_key_on_enter(void* context) {
+    Picopass* picopass = context;
+    DOLPHIN_DEED(DolphinDeedNfcSave);
+
+    // Setup view
+    Popup* popup = picopass->popup;
+    popup_set_header(popup, "Writing\niClass\nkey", 68, 30, AlignLeft, AlignTop);
+    popup_set_icon(popup, 0, 3, &I_RFIDDolphinSend_97x61);
+
+    // Start worker
+    view_dispatcher_switch_to_view(picopass->view_dispatcher, PicopassViewPopup);
+    picopass_worker_start(
+        picopass->worker,
+        PicopassWorkerStateWriteStandardKey,
+        &picopass->dev->dev_data,
+        picopass_write_key_worker_callback,
+        picopass);
+
+    picopass_blink_start(picopass);
+}
+
+bool picopass_scene_write_key_on_event(void* context, SceneManagerEvent event) {
+    Picopass* picopass = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        if(event.event == PicopassCustomEventWorkerExit) {
+            scene_manager_next_scene(picopass->scene_manager, PicopassSceneWriteCardSuccess);
+            consumed = true;
+        }
+    }
+    return consumed;
+}
+
+void picopass_scene_write_key_on_exit(void* context) {
+    Picopass* picopass = context;
+
+    // Stop worker
+    picopass_worker_stop(picopass->worker);
+    // Clear view
+    popup_reset(picopass->popup);
+
+    picopass_blink_stop(picopass);
+}