Add NFC Emulate UID(works only for FeliCa)

Author: andreock

README.md

@@ -33,7 +33,7 @@ Working Features:
 
 - Wi-Fi support
 - BLE support
-- BadUSB support(Limited to 4-5 files in file browser)
+- BadUSB support
 - NFC support
 - Some network attacks
 - SubGHZ(Beta support, need more testing)

lib/UI/navigation/NFC/NFCNavigation.cpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@
 #include "pages/NFC/NFCPollingResultPage.hpp"
 #include "pages/NFC/NFCPollingWaitingPage.hpp"
 #include "pages/NFC/NFCWriteResultPage.hpp"
+#include "pages/NFC/NFCEmulateTagPage.hpp"
 #include "posixsd.hpp"
 #include "sdcard_helper.hpp"
 
@@ -44,6 +45,7 @@ static NFCBruteforceTagPage *nfc_bruteforce_tag_page = nullptr;
 static NFCFelicaPollingResultPage *nfc_felica_polling_result_page = nullptr;
 static FileBrowserPage *nfc_dump_file_browser_page = nullptr;
 static NFCWriteResultPage *nfc_write_result_page = nullptr;
+static NFCEmulateTagPage *nfc_emulate_tag_page = nullptr;
 
 std::list<std::string> nfc_dumps_files;  // NFC Dumps files
 
@@ -76,7 +78,7 @@ void goto_nfc_polling_result_gui(uint8_t *uid, uint8_t len,
                                  const char *tag_name) {
   gui->reset();
   nfc_polling_result_page =
-      new NFCPollingResultPage(5, 2, 1, gui->get_screen());
+      new NFCPollingResultPage(6, 2, 1, gui->get_screen());
   gui->set_current_page(nfc_polling_result_page, false);
   nfc_polling_result_page->display(uid, len, tag_name);
 }
@@ -94,13 +96,25 @@ void nfc_cleanup() {
   }
 }
 
+bool emulating = false;
+
 void goto_home() {
+  if(emulating) {
+    stop_emulate();
+    emulating = false;
+  }
   reset_uid();
   reset_felica();
   nfc_cleanup();
   init_main_gui();
 }
 
+void nfc_return_back() {
+  stop_emulate();
+  gui->reset();
+  gui->set_current_page(nfc_polling_result_page);
+}
+
 void save_dump_to_sd() {
   Serial.println("save_dump_to_sd");
   save_file(DUMP_SAVE_PATH, nfc_attacks->get_scanned_tag()->get_data(), 224);
@@ -189,7 +203,7 @@ void write_felica_tag() {
 void init_nfc_felica_polling_result_gui(uint8_t *idm, uint8_t *pmm,
                                         uint16_t sys_code) {
   nfc_felica_polling_result_page =
-      new NFCFelicaPollingResultPage(5, 4, 1, gui->get_screen());
+      new NFCFelicaPollingResultPage(6, 4, 1, gui->get_screen());
   nfc_felica_polling_result_page->display(idm, pmm, sys_code);
   gui->set_current_page(nfc_felica_polling_result_page, false);
   nfc_polling_waiting_page = nullptr;
@@ -200,6 +214,31 @@ void felica_dump() {
   dump_felica(gui, nfc_attacks);
 }
 
+extern uint8_t uid[8];
+
+void emulate_iso14443a() {
+  gui->reset();
+  nfc_emulate_tag_page = new NFCEmulateTagPage(1, 1, 1, gui->get_screen());
+  gui->set_current_page(nfc_emulate_tag_page, true, false);
+  emulate_iso14443a_tag(uid, nfc_attacks);
+  emulating = true;
+}
+
+extern uint8_t idm[8];
+extern uint8_t pmm[8];
+extern uint16_t sys_code;
+
+void emulate_iso18092() {
+  gui->reset();
+  nfc_emulate_tag_page = new NFCEmulateTagPage(2, 1, 1, gui->get_screen());
+  gui->set_current_page(nfc_emulate_tag_page, true, false);
+  uint8_t _sys_code[2];
+  _sys_code[0] = sys_code >> 8;
+  _sys_code[1] = sys_code & 0xff;
+  emulate_iso18092_tag(idm, pmm, _sys_code, nfc_attacks);
+  emulating = true;
+}
+
 void set_dumped_sectors(int sectors) {
   nfc_dump_result_page->set_dumped(sectors);
 };

lib/UI/navigation/NFC/NFCNavigation.hpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,10 +28,13 @@ void nfc_mifare_polling();
 void nfc_felica_polling();
 void format_nfc_tag();
 void goto_home();
+void nfc_return_back();
 void open_nfc_dump_browser();
 void bruteforce_a_tag();
 void init_nfc_felica_polling_result_gui(uint8_t *idm, uint8_t *pmm,
                                         uint16_t sys_code);
+void emulate_iso14443a();
+void emulate_iso18092();
 void set_dumped_sectors(int sectors);
 void set_unreadable_sectors(int sectors);
 void set_unauthenticated_sectors(int sectors);

lib/UI/pages/NFC/FeliCaPages/NFCFelicaPollingResultPage.cpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -39,6 +39,7 @@ void NFCFelicaPollingResultPage::display(uint8_t *idm, uint8_t *pmm,
       english_words->at(NFC_FELICA_SYSTEM_CODE_KEY) + String(sys_code, HEX));
   dump_to_sd = new List(screen, english_words->at(NFC_DUMP_TAG_TO_SD), 2,
                         ST77XX_WHITE, 20, ST77XX_BLACK, felica_dump);
+  emulate_tag = new List(screen, "Emulate UID", 2, ST77XX_WHITE, 20, ST77XX_BLACK, emulate_iso18092);
   // write_tag = new List(screen, "Write tag", 2, ST77XX_WHITE, 20,
   // ST77XX_BLACK); format_tag = new List(screen,
   // english_words->at(NFC_FORMAT_TAG_TO_SD), 2,
@@ -55,6 +56,7 @@ void NFCFelicaPollingResultPage::display(uint8_t *idm, uint8_t *pmm,
   // grid->add(write_tag);
   // grid->add(format_tag);
   //   grid->add(bruteforce_tag);
+  grid->add(emulate_tag);
   grid->add(exit_page);
   grid->set_selected(4, true);
   grid->set_y_spacing(20);

lib/UI/pages/NFC/FeliCaPages/NFCFelicaPollingResultPage.hpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -34,6 +34,7 @@ class NFCFelicaPollingResultPage : public Page {
   List *write_tag;
   List *format_tag;
   List *bruteforce_tag;
+  List *emulate_tag;
   List *exit_page;
 
  public:

lib/UI/pages/NFC/NFCEmulateTagPage.cpp

@@ -0,0 +1,38 @@
+/*
+ * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "NFCEmulateTagPage.hpp"
+#include "../../navigation/NFC/NFCNavigation.hpp"
+
+#include "gui.hpp"
+
+NFCEmulateTagPage::~NFCEmulateTagPage() {
+  delete emulate_text;
+  delete exit_page;
+}
+
+void NFCEmulateTagPage::display() {
+  grid = new Grid(screen, 2, 1);
+  emulate_text =
+      new Text(screen, ST77XX_WHITE, "Emulating tag...");
+  exit_page = new List(screen, "Exit", 2, ST77XX_WHITE, 20, ST77XX_BLACK, goto_home);
+  grid->add(emulate_text);
+  grid->add(exit_page);
+  grid->set_y_spacing(20);
+  grid->set_selected(1, true);
+  grid->display();
+}

lib/UI/pages/NFC/NFCEmulateTagPage.hpp

@@ -0,0 +1,45 @@
+/*
+ * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../../i18n.hpp"
+#include "../../i18n/NFC/nfc_format_page_keys.h"
+#include "../Page.hpp"
+#include "Grid.hpp"
+#include "List.hpp"
+#include "Text.hpp"
+
+#ifndef NFC_EMULATE_PAGE_H
+#define NFC_EMULATE_PAGE_H
+
+class NFCEmulateTagPage : public Page {
+ private:
+  Text *emulate_text;
+  List *exit_page;
+
+ public:
+  NFCEmulateTagPage(uint8_t _position_limit, uint8_t _lower_limit,
+                      uint8_t _position_increment, GFXForms *screen)
+      : Page(_position_limit, _lower_limit, _position_increment, screen) {
+        };
+  ~NFCEmulateTagPage();
+  void display();
+
+  void click(int pos, void callback()) { grid->click(pos, callback); };
+  void set_selected(int pos, bool status) { grid->set_selected(pos, status); };
+};
+
+#endif

lib/UI/pages/NFC/NFCPollingResultPage.cpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -43,13 +43,15 @@ void NFCPollingResultPage::display(uint8_t *uid, uint8_t length,
   bruteforce_tag =
       new List(screen, english_words->at(NFC_BRUTEFORCE_TAG_KEY), 2,
                ST77XX_WHITE, 20, ST77XX_BLACK, bruteforce_a_tag);
+  emulate_tag = new List(screen, "Emulate UID", 2, ST77XX_WHITE, 20, ST77XX_BLACK, emulate_iso14443a);
   exit_page = new List(screen, english_words->at(NFC_GO_BACK_KEY), 2,
                        ST77XX_WHITE, 20, ST77XX_BLACK, goto_home);
   grid->add(tag_info);
   grid->add(uid_text);
   grid->add(write_tag);
   grid->add(format_tag);
   grid->add(bruteforce_tag);
+  grid->add(emulate_tag);
   grid->add(exit_page);
   grid->set_selected(2, true);
   grid->set_y_spacing(20);

lib/UI/pages/NFC/NFCPollingResultPage.hpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,6 +32,7 @@ class NFCPollingResultPage : public Page {
   List *write_tag;
   List *format_tag;
   List *bruteforce_tag;
+  List *emulate_tag;
   List *exit_page;
 
  public:

lib/nfc_attacks/nfc_attacks.cpp

@@ -1,6 +1,6 @@
 /*
  * This file is part of the Capibara zero (https://github.com/CapibaraZero/fw or
- * https://capibarazero.github.io/). Copyright (c) 2024 Andrea Canale.
+ * https://capibarazero.github.io/). Copyright (c) 2025 Andrea Canale.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -562,4 +562,12 @@ NFCTag NFCAttacks::get_felica_towrite() {
     memcpy(&data[i][0], &buffer[i * 16], 16);
   }
   return NFCTag(idm, pmm, sys_code, data);
-}
+}
+
+bool NFCAttacks::emulate_tag(uint8_t *uid) {
+  return nfc_framework.emulate_tag(uid);
+}
+
+bool NFCAttacks::emulate_tag(uint8_t *idm, uint8_t *pmm, uint8_t *sys_code) {
+  return nfc_framework.emulate_tag(idm, pmm, sys_code);
+};