NFC: Add write support for password-protected mf ultralight tag

flipperdevices · Jan 13, 2024 · 201f7cc · 201f7cc
1 parent 0789cbd
commit 201f7cc
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Showing 4 changed files with 29 additions and 13 deletions.
diff --git a/applications/main/nfc/scenes/nfc_scene_mf_ultralight_write.c b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_write.c
@@ -20,7 +20,19 @@ NfcCommand nfc_scene_mf_ultralight_write_worker_callback(NfcGenericEvent event,
         mfu_event->data->poller_mode = MfUltralightPollerModeWrite;
         view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventCardDetected);
     } else if(mfu_event->type == MfUltralightPollerEventTypeAuthRequest) {
-        mfu_event->data->auth_context.skip_auth = true;
+        const MfUltralightData* mfu_ref_data =
+            nfc_device_get_data(instance->nfc_device, NfcProtocolMfUltralight);
+        MfUltralightConfigPages* config = NULL;
+        mf_ultralight_get_config_page(mfu_ref_data, &config);
+        if(config->auth0 <= mfu_ref_data->pages_total - 1) {
+            uint8_t pwd_page_idx = mf_ultralight_get_pwd_page_num(mfu_ref_data->type);
+            memcpy(
+                mfu_event->data->auth_context.password.data,
+                mfu_ref_data->page[pwd_page_idx].data,
+                sizeof(MfUltralightAuthPassword));
+        } else {
+            mfu_event->data->auth_context.skip_auth = true;
+        }
     } else if(mfu_event->type == MfUltralightPollerEventTypeRequestWriteData) {
         mfu_event->data->write_data =
             nfc_device_get_data(instance->nfc_device, NfcProtocolMfUltralight);
@@ -31,6 +43,8 @@ NfcCommand nfc_scene_mf_ultralight_write_worker_callback(NfcGenericEvent event,
         view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventPollerFailure);
         command = NfcCommandStop;
     } else if(mfu_event->type == MfUltralightPollerEventTypeWriteFail) {
+        FURI_LOG_D("MfUltralightWrite", "Write failed with %d", mfu_event->data->error);
+        view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventPollerFailure);
         command = NfcCommandStop;
     } else if(mfu_event->type == MfUltralightPollerEventTypeWriteSuccess) {
         view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventPollerSuccess);

diff --git a/applications/main/nfc/scenes/nfc_scene_mf_ultralight_write_fail.c b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_write_fail.c
@@ -26,7 +26,7 @@ void nfc_scene_mf_ultralight_write_fail_on_enter(void* context) {
         AlignLeft,
         AlignTop,
         FontSecondary,
-        "Card protected by\npassword, AUTH0\nor lock bits");
+        "Wrong password or\ncard protected by\nlock bits");
 
     widget_add_button_element(
         widget,

diff --git a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c
@@ -374,8 +374,7 @@ static NfcCommand mf_ultralight_poller_handler_read_tearing_flags(MfUltralightPo
     NfcCommand command = NfcCommandContinue;
 
     if(mf_ultralight_support_feature(
-           instance->feature_set,
-           MfUltralightFeatureSupportCheckTearingFlag | MfUltralightFeatureSupportSingleCounter)) {
+           instance->feature_set, MfUltralightFeatureSupportCheckTearingFlag)) {
         if(instance->tearing_flag_read == instance->tearing_flag_total) {
             instance->state = MfUltralightPollerStateTryDefaultPass;
             command = NfcCommandReset;
@@ -436,7 +435,11 @@ static NfcCommand mf_ultralight_poller_handler_auth(MfUltralightPoller* instance
             }
         }
     }
-    instance->state = MfUltralightPollerStateReadPages;
+    if(instance->mode == MfUltralightPollerModeRead) {
+        instance->state = MfUltralightPollerStateReadPages;
+    } else {
+        instance->state = MfUltralightPollerStateRequestWriteData;
+    }
 
     return command;
 }
@@ -543,14 +546,8 @@ static NfcCommand mf_ultralight_poller_handler_read_success(MfUltralightPoller*
     FURI_LOG_D(TAG, "Read success");
     instance->mfu_event.type = MfUltralightPollerEventTypeReadSuccess;
     NfcCommand command = instance->callback(instance->general_event, instance->context);
-
-    if(instance->mode == MfUltralightPollerModeRead) {
-        iso14443_3a_poller_halt(instance->iso14443_3a_poller);
-        instance->state = MfUltralightPollerStateIdle;
-    } else {
-        instance->state = MfUltralightPollerStateRequestWriteData;
-    }
-
+    iso14443_3a_poller_halt(instance->iso14443_3a_poller);
+    instance->state = MfUltralightPollerStateIdle;
     return command;
 }
 

diff --git a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.c b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.c
@@ -183,6 +183,11 @@ MfUltralightError mf_ultralight_poller_write_page(
             break;
         }
         if(!bit_buffer_starts_with_byte(instance->rx_buffer, MF_ULTRALIGHT_CMD_ACK)) {
+            FURI_LOG_D(
+                TAG,
+                "Write page %u NAK'd with %u",
+                page,
+                bit_buffer_get_byte(instance->rx_buffer, 0));
             ret = MfUltralightErrorProtocol;
             break;
         }