NFC: Improvements to NFC Magic app (#2760)

Ability to write gen1b tags (ignore 0x43)
Ability to write gen1 7 byte UID tags
Fix detection of non magic cards

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

applications/external/nfc_magic/nfc_magic_i.h

@@ -46,6 +46,7 @@ enum NfcMagicCustomEvent {
 struct NfcMagicDevice {
     MagicType type;
     uint32_t cuid;
+    uint8_t uid_len;
     uint32_t password;
 };
 

applications/external/nfc_magic/nfc_magic_worker.c

@@ -107,14 +107,7 @@ void nfc_magic_worker_write(NfcMagicWorker* nfc_magic_worker) {
                 }
                 magic_activate();
                 if(magic_gen1_wupa()) {
-                    if(!magic_gen1_data_access_cmd()) {
+                    magic_gen1_data_access_cmd();
-                        FURI_LOG_E(
-                            TAG, "No card response to data access command (not a magic card)");
-                        nfc_magic_worker->callback(
-                            NfcMagicWorkerEventWrongCard, nfc_magic_worker->context);
-                        done = true;
-                        break;
-                    }
 
                     MfClassicData* mfc_data = &dev_data->mf_classic_data;
                     for(size_t i = 0; i < 64; i++) {
@@ -296,6 +289,7 @@ void nfc_magic_worker_write(NfcMagicWorker* nfc_magic_worker) {
 }
 
 void nfc_magic_worker_check(NfcMagicWorker* nfc_magic_worker) {
+    FuriHalNfcDevData nfc_data = {};
     NfcMagicDevice* magic_dev = nfc_magic_worker->magic_dev;
     bool card_found_notified = false;
     uint8_t gen4_config[MAGIC_GEN4_CONFIG_LEN];
@@ -310,32 +304,44 @@ void nfc_magic_worker_check(NfcMagicWorker* nfc_magic_worker) {
                 card_found_notified = true;
             }
 
-            furi_hal_nfc_activate_nfca(200, &magic_dev->cuid);
+            if(furi_hal_nfc_detect(&nfc_data, 200)) {
-            nfc_magic_worker->callback(NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
+                magic_dev->cuid = nfc_data.cuid;
-            break;
+                magic_dev->uid_len = nfc_data.uid_len;
-        }
+            } else {
-
+                // wrong BCC
-        magic_deactivate();
+                magic_dev->uid_len = 4;
-        furi_delay_ms(300);
-        magic_activate();
-
-        furi_hal_nfc_activate_nfca(200, &magic_dev->cuid);
-        if(magic_gen4_get_cfg(magic_dev->password, gen4_config)) {
-            magic_dev->type = MagicTypeGen4;
-            if(!card_found_notified) {
-                nfc_magic_worker->callback(
-                    NfcMagicWorkerEventCardDetected, nfc_magic_worker->context);
-                card_found_notified = true;
             }
-
             nfc_magic_worker->callback(NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
             break;
-        }
+        } else {
+            magic_deactivate();
+            magic_activate();
+            if(furi_hal_nfc_detect(&nfc_data, 200)) {
+                magic_dev->cuid = nfc_data.cuid;
+                magic_dev->uid_len = nfc_data.uid_len;
+                if(magic_gen4_get_cfg(magic_dev->password, gen4_config)) {
+                    magic_dev->type = MagicTypeGen4;
+                    if(!card_found_notified) {
+                        nfc_magic_worker->callback(
+                            NfcMagicWorkerEventCardDetected, nfc_magic_worker->context);
+                        card_found_notified = true;
+                    }
 
-        if(card_found_notified) {
+                    nfc_magic_worker->callback(
-            nfc_magic_worker->callback(
+                        NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
-                NfcMagicWorkerEventNoCardDetected, nfc_magic_worker->context);
+                } else {
-            card_found_notified = false;
+                    nfc_magic_worker->callback(
+                        NfcMagicWorkerEventWrongCard, nfc_magic_worker->context);
+                    card_found_notified = true;
+                }
+                break;
+            } else {
+                if(card_found_notified) {
+                    nfc_magic_worker->callback(
+                        NfcMagicWorkerEventNoCardDetected, nfc_magic_worker->context);
+                    card_found_notified = false;
+                }
+            }
         }
 
         magic_deactivate();

applications/external/nfc_magic/scenes/nfc_magic_scene_file_select.c

@@ -8,7 +8,7 @@ static bool nfc_magic_scene_file_select_is_file_suitable(NfcMagic* nfc_magic) {
         case MagicTypeClassicDirectWrite:
         case MagicTypeClassicAPDU:
             if((nfc_dev->dev_data.mf_classic_data.type != MfClassicType1k) ||
-               (nfc_dev->dev_data.nfc_data.uid_len != 4)) {
+               (nfc_dev->dev_data.nfc_data.uid_len != nfc_magic->dev->uid_len)) {
                 return false;
             }
             return true;

applications/external/nfc_magic/scenes/nfc_magic_scene_not_magic.c

@@ -13,11 +13,10 @@ void nfc_magic_scene_not_magic_on_enter(void* context) {
 
     notification_message(nfc_magic->notifications, &sequence_error);
 
-    // widget_add_icon_element(widget, 73, 17, &I_DolphinCommon_56x48);
     widget_add_string_element(
         widget, 3, 4, AlignLeft, AlignTop, FontPrimary, "This is wrong card");
     widget_add_string_multiline_element(
-        widget, 4, 17, AlignLeft, AlignTop, FontSecondary, "Not a magic\ncard");
+        widget, 4, 17, AlignLeft, AlignTop, FontSecondary, "Not magic or unsupported\ncard");
     widget_add_button_element(
         widget, GuiButtonTypeLeft, "Retry", nfc_magic_scene_not_magic_widget_callback, nfc_magic);