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ZeroPass / dmrtd

Dart library for reading Biometric Passport
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Algerian 2024 cards error #34

Closed Zidoun-Abdou closed 1 month ago

Zidoun-Abdou commented 3 months ago

Hello Sir !, thank you very much for the library, it was working very good with Algerian passports and Idcards, but I'm facing the next error with the new Idcards:

I/flutter (19080): passport FINE: 2024-08-05 16:26:15.734148: Reading EF.CardAccess I/flutter (19080): passport FINE: 2024-08-05 16:26:15.740979: Selecting MF I/flutter (19080): mrtd.api FINE: 2024-08-05 16:26:15.742924: Selecting root Master File I/flutter (19080): icc FINE: 2024-08-05 16:26:15.746479: Transceiving to ICC: C-APDU(CLA:00 INS:A4 P1:00 P2:00 Le:0 Lc:0 Data:null) I/flutter (19080): icc FINE: 2024-08-05 16:26:15.751509: Sending 4 byte(s) to ICC: data='00a40000' I/flutter (19080): icc FINE: 2024-08-05 16:26:15.795560: Received 2 byte(s) from ICC I/flutter (19080): icc FINE: 2024-08-05 16:26:15.797960: Received response from ICC: sw=6700 data_len=0 I/flutter (19080): mrtd.api WARNING: 2024-08-05 16:26:15.802688: Couldn't select MF by P1: 0, P2: 0 sw=sw=6700, re-trying to select MF with FileID=3F00 I/flutter (19080): icc FINE: 2024-08-05 16:26:15.805214: Transceiving to ICC: C-APDU(CLA:00 INS:A4 P1:00 P2:00 Le:0 Lc:2 Data:3f00) I/flutter (19080): icc FINE: 2024-08-05 16:26:15.806180: Sending 7 byte(s) to ICC: data='00a40000023f00' I/flutter (19080): icc FINE: 2024-08-05 16:26:15.852395: Received 2 byte(s) from ICC I/flutter (19080): icc FINE: 2024-08-05 16:26:15.852691: Received response from ICC: sw=6700 data_len=0 I/flutter (19080): mrtd.api WARNING: 2024-08-05 16:26:15.853470: Couldn't select MF by P1=0, P2=0, FileID=3F00 sw=sw=6700, re-trying to select MF with P2=0x0C and FileID=3F00 I/flutter (19080): icc FINE: 2024-08-05 16:26:15.854104: Transceiving to ICC: C-APDU(CLA:00 INS:A4 P1:00 P2:0C Le:0 Lc:2 Data:3f00) I/flutter (19080): icc FINE: 2024-08-05 16:26:15.854427: Sending 7 byte(s) to ICC: data='00a4000c023f00' I/flutter (19080): icc FINE: 2024-08-05 16:26:15.892469: Received 2 byte(s) from ICC I/flutter (19080): icc FINE: 2024-08-05 16:26:15.892794: Received response from ICC: sw=9000 data_len=0 I/flutter (19080): mrtd.api FINE: 2024-08-05 16:26:15.894335: Reading file sfi=0x1C I/flutter (19080): icc FINE: 2024-08-05 16:26:15.895624: Transceiving to ICC: C-APDU(CLA:00 INS:B0 P1:9C P2:00 Le:8 Lc:0 Data:null) I/flutter (19080): icc FINE: 2024-08-05 16:26:15.896093: Sending 5 byte(s) to ICC: data='00b09c0008' I/flutter (19080): icc FINE: 2024-08-05 16:26:15.948402: Received 2 byte(s) from ICC I/flutter (19080): icc FINE: 2024-08-05 16:26:15.948822: Received response from ICC: sw=6282 data_len=0 I/flutter (19080): nfc.provider FINE: 2024-08-05 16:26:15.950810: Disconnecting E/flutter (19080): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value E/flutter (19080): #0 MrtdApi.readFileBySFI (package:dmrtd/src/proto/mrtd_api.dart:167:51) E/flutter (19080): E/flutter (19080): #1 Passport._exec (package:dmrtd/src/passport.dart:428:14) E/flutter (19080): E/flutter (19080): #2 Passport.readEfCardAccess (package:dmrtd/src/passport.dart:104:11) E/flutter (19080): E/flutter (19080): #3 _MrtdHomePageState._readMRTD (package:mrtdeg/main.dart:264:31) E/flutter (19080): E/flutter (19080):

this is my code:

// Created by Crt Vavros, copyright © 2022 ZeroPass. All rights reserved. // ignore_for_file: prefer_adjacent_string_concatenation, prefer_interpolation_to_compose_strings

import 'dart:convert'; import 'dart:io'; import 'package:http/http.dart' as http; import 'package:expandable/expandable.dart'; import 'package:flutter/material.dart'; import 'package:flutter/cupertino.dart'; import 'dart:async'; import 'dart:typed_data'; import 'package:image_picker/image_picker.dart'; import 'package:dmrtd/dmrtd.dart'; import 'package:dmrtd/extensions.dart'; import 'package:flutter/services.dart'; import 'package:intl/intl.dart'; import 'package:logging/logging.dart'; import 'package:shared_preferences/shared_preferences.dart'; import 'package:toast/toast.dart';

class MrtdData { EfCardAccess? cardAccess; EfCardSecurity? cardSecurity; EfCOM? com; EfSOD? sod; EfDG1? dg1; EfDG2? dg2; EfDG3? dg3; EfDG4? dg4; EfDG5? dg5; EfDG6? dg6; EfDG7? dg7; EfDG8? dg8; EfDG9? dg9; EfDG10? dg10; EfDG11? dg11; EfDG12? dg12; EfDG13? dg13; EfDG14? dg14; EfDG15? dg15; EfDG16? dg16; Uint8List? aaSig; }

final Map<DgTag, String> dgTagToString = { EfDG1.TAG: 'EF.DG1', EfDG2.TAG: 'EF.DG2', EfDG3.TAG: 'EF.DG3', EfDG4.TAG: 'EF.DG4', EfDG5.TAG: 'EF.DG5', EfDG6.TAG: 'EF.DG6', EfDG7.TAG: 'EF.DG7', EfDG8.TAG: 'EF.DG8', EfDG9.TAG: 'EF.DG9', EfDG10.TAG: 'EF.DG10', EfDG11.TAG: 'EF.DG11', EfDG12.TAG: 'EF.DG12', EfDG13.TAG: 'EF.DG13', EfDG14.TAG: 'EF.DG14', EfDG15.TAG: 'EF.DG15', EfDG16.TAG: 'EF.DG16' };

String formatEfCom(final EfCOM efCom) { var str = "version: ${efCom.version}\n" "unicode version: ${efCom.unicodeVersion}\n" "DG tags:";

for (final t in efCom.dgTags) { try { str += " ${dgTagToString[t]!}"; } catch (e) { str += " 0x${t.value.toRadixString(16)}"; } } return str; }

String formatMRZ(final MRZ mrz) { return "MRZ\n" " version: ${mrz.version}\n" + " doc code: ${mrz.documentCode}\n" + " doc No.: ${mrz.documentNumber}\n" + " country: ${mrz.country}\n" + " nationality: ${mrz.nationality}\n" + " name: ${mrz.firstName}\n" + " surname: ${mrz.lastName}\n" + " gender: ${mrz.gender}\n" + " date of birth: ${DateFormat.yMd().format(mrz.dateOfBirth)}\n" + " date of expiry: ${DateFormat.yMd().format(mrz.dateOfExpiry)}\n" + " add. data: ${mrz.optionalData}\n" + " add. data: ${mrz.optionalData2}"; }

String formatDG15(final EfDG15 dg15) { var str = "EF.DG15:\n" " AAPublicKey\n" " type: ";

final rawSubPubKey = dg15.aaPublicKey.rawSubjectPublicKey(); if (dg15.aaPublicKey.type == AAPublicKeyType.RSA) { final tvSubPubKey = TLV.fromBytes(rawSubPubKey); var rawSeq = tvSubPubKey.value; if (rawSeq[0] == 0x00) { rawSeq = rawSeq.sublist(1); }

final tvKeySeq = TLV.fromBytes(rawSeq);
final tvModule = TLV.decode(tvKeySeq.value);
final tvExp = TLV.decode(tvKeySeq.value.sublist(tvModule.encodedLen));

str += "RSA\n"
    "    exponent: ${tvExp.value.hex()}\n"
    "    modulus: ${tvModule.value.hex()}";

} else { str += "EC\n SubjectPublicKey: ${rawSubPubKey.hex()}"; } return str; }

String formatProgressMsg(String message, int percentProgress) { final p = (percentProgress / 20).round(); final full = "🟢 " p; final empty = "⚪️ " (5 - p); return message + "\n\n" + full + empty; }

late SharedPreferences prefs;

void main() async { WidgetsFlutterBinding.ensureInitialized(); prefs = await SharedPreferences.getInstance(); Logger.root.level = Level.ALL; Logger.root.onRecord.listen((record) { print( '${record.loggerName} ${record.level.name}: ${record.time}: ${record.message}'); }); runApp(MrtdEgApp()); }

class MrtdEgApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp(localizationsDelegates: [ DefaultMaterialLocalizations.delegate, DefaultCupertinoLocalizations.delegate, DefaultWidgetsLocalizations.delegate, ], home: MrtdHomePage()); } }

class MrtdHomePage extends StatefulWidget { @override // ignore: library_private_types_in_public_api _MrtdHomePageState createState() => _MrtdHomePageState(); }

class _MrtdHomePageState extends State { var _alertMessage = ""; final _log = Logger("mrtdeg.app"); var _isNfcAvailable = false; var _isReading = false; final _mrzData = GlobalKey();

// mrz data final _docNumber = TextEditingController(text: "411358813"); final _dob = TextEditingController(text: "10/18/1992"); // date of birth final _doe = TextEditingController(text: "04/22/2034"); // date of doc expiry

MrtdData? _mrtdData;

final NfcProvider _nfc = NfcProvider(); // ignore: unused_field late Timer _timerStateUpdater; final _scrollController = ScrollController();

@override void initState() { super.initState(); SystemChrome.setPreferredOrientations([ DeviceOrientation.portraitUp, DeviceOrientation.portraitDown, ]);

_initPlatformState();

// Update platform state every 3 sec
_timerStateUpdater = Timer.periodic(Duration(seconds: 3), (Timer t) {
  _initPlatformState();
});

}

// Platform messages are asynchronous, so we initialize in an async method. Future _initPlatformState() async { bool isNfcAvailable; try { NfcStatus status = await NfcProvider.nfcStatus; isNfcAvailable = status == NfcStatus.enabled; } on PlatformException { isNfcAvailable = false; }

// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;

setState(() {
  _isNfcAvailable = isNfcAvailable;
});

}

DateTime? _getDOBDate() { if (_dob.text.isEmpty) { return null; } return DateFormat.yMd().parse(_dob.text); }

DateTime? _getDOEDate() { if (_doe.text.isEmpty) { return null; } return DateFormat.yMd().parse(_doe.text); }

Future<String?> _pickDate(BuildContext context, DateTime firstDate, DateTime initDate, DateTime lastDate) async { final locale = Localizations.localeOf(context); final DateTime? picked = await showDatePicker( context: context, firstDate: firstDate, initialDate: initDate, lastDate: lastDate, locale: locale);

if (picked != null) {
  return DateFormat.yMd().format(picked);
}
return null;

}

void _readMRTD() async { try { setState(() { _mrtdData = null; _alertMessage = "Waiting for Passport tag ..."; _isReading = true; });

  await _nfc.connect(
      iosAlertMessage: "Hold your phone near Biometric Passport");
  final passport = Passport(_nfc);

  setState(() {
    _alertMessage = "Reading Passport ...";
  });

  _nfc.setIosAlertMessage("Trying to read EF.CardAccess ...");
  final mrtdData = MrtdData();

  try {
    mrtdData.cardAccess = await passport.readEfCardAccess();
  } on PassportError {
    //if (e.code != StatusWord.fileNotFound) rethrow;
  }

  _nfc.setIosAlertMessage("Trying to read EF.CardSecurity ...");

  try {
    mrtdData.cardSecurity = await passport.readEfCardSecurity();
  } on PassportError {
    //if (e.code != StatusWord.fileNotFound) rethrow;
  }

  _nfc.setIosAlertMessage("Initiating session ...");
  final bacKeySeed =
  DBAKey(_docNumber.text, _getDOBDate()!, _getDOEDate()!);
  await passport.startSession(bacKeySeed);

  _nfc.setIosAlertMessage(formatProgressMsg("Reading EF.COM ...", 0));
  mrtdData.com = await passport.readEfCOM();

  _nfc.setIosAlertMessage(formatProgressMsg("Reading Data Groups ...", 20));

  if (mrtdData.com!.dgTags.contains(EfDG1.TAG)) {
    mrtdData.dg1 = await passport.readEfDG1();
  }

  if (mrtdData.com!.dgTags.contains(EfDG2.TAG)) {
    mrtdData.dg2 = await passport.readEfDG2();
  }

  // To read DG3 and DG4 session has to be established with CVCA certificate (not supported).
  // if(mrtdData.com!.dgTags.contains(EfDG3.TAG)) {
  //   mrtdData.dg3 = await passport.readEfDG3();
  // }

  // if(mrtdData.com!.dgTags.contains(EfDG4.TAG)) {
  //   mrtdData.dg4 = await passport.readEfDG4();
  // }

  if (mrtdData.com!.dgTags.contains(EfDG5.TAG)) {
    mrtdData.dg5 = await passport.readEfDG5();
  }

  if (mrtdData.com!.dgTags.contains(EfDG6.TAG)) {
    mrtdData.dg6 = await passport.readEfDG6();
  }

  if (mrtdData.com!.dgTags.contains(EfDG7.TAG)) {
    mrtdData.dg7 = await passport.readEfDG7();
  }

  if (mrtdData.com!.dgTags.contains(EfDG8.TAG)) {
    mrtdData.dg8 = await passport.readEfDG8();
  }

  if (mrtdData.com!.dgTags.contains(EfDG9.TAG)) {
    mrtdData.dg9 = await passport.readEfDG9();
  }

  if (mrtdData.com!.dgTags.contains(EfDG10.TAG)) {
    mrtdData.dg10 = await passport.readEfDG10();
  }

  if (mrtdData.com!.dgTags.contains(EfDG11.TAG)) {
    mrtdData.dg11 = await passport.readEfDG11();
  }

  if (mrtdData.com!.dgTags.contains(EfDG12.TAG)) {
    mrtdData.dg12 = await passport.readEfDG12();
  }

  if (mrtdData.com!.dgTags.contains(EfDG13.TAG)) {
    mrtdData.dg13 = await passport.readEfDG13();
  }

  if (mrtdData.com!.dgTags.contains(EfDG14.TAG)) {
    mrtdData.dg14 = await passport.readEfDG14();
  }

  if (mrtdData.com!.dgTags.contains(EfDG15.TAG)) {
    mrtdData.dg15 = await passport.readEfDG15();
    _nfc.setIosAlertMessage(formatProgressMsg("Doing AA ...", 60));
    mrtdData.aaSig = await passport.activeAuthenticate(Uint8List(8));
  }

  if (mrtdData.com!.dgTags.contains(EfDG16.TAG)) {
    mrtdData.dg16 = await passport.readEfDG16();
  }

  _nfc.setIosAlertMessage(formatProgressMsg("Reading EF.SOD ...", 80));
  mrtdData.sod = await passport.readEfSOD();

  setState(() {
    _mrtdData = mrtdData;
  });

  setState(() {
    _alertMessage = "";
  });

  _scrollController.animateTo(300.0,
      duration: Duration(milliseconds: 500), curve: Curves.ease);
} on Exception catch (e) {
  final se = e.toString().toLowerCase();
  String alertMsg = "An error has occurred while reading Passport!";
  if (e is PassportError) {
    if (se.contains("security status not satisfied")) {
      alertMsg =
      "Failed to initiate session with passport.\nCheck input data!";
    }
    _log.error("PassportError: ${e.message}");
  } else {
    _log.error(
        "An exception was encountered while trying to read Passport: $e");
  }

  if (se.contains('timeout')) {
    alertMsg = "Timeout while waiting for Passport tag";
  } else if (se.contains("tag was lost")) {
    alertMsg = "Tag was lost. Please try again!";
  } else if (se.contains("invalidated by user")) {
    alertMsg = "";
  }

  setState(() {
    _alertMessage = alertMsg;
  });
} finally {
  if (_alertMessage.isNotEmpty) {
    await _nfc.disconnect(iosErrorMessage: _alertMessage);
  } else {
    await _nfc.disconnect(
        iosAlertMessage: formatProgressMsg("Finished", 100));
  }
  setState(() {
    _isReading = false;
  });
}

}

bool _disabledInput() { return _isReading || !_isNfcAvailable; }

Widget _makeMrtdDataWidget( {required String header, required String collapsedText, required dataText}) { return ExpandablePanel( theme: const ExpandableThemeData( headerAlignment: ExpandablePanelHeaderAlignment.center, tapBodyToCollapse: true, hasIcon: true, iconColor: Colors.red, ), header: Text(header), collapsed: Text(collapsedText, softWrap: true, maxLines: 2, overflow: TextOverflow.ellipsis), expanded: Container( padding: const EdgeInsets.all(18), color: Color.fromARGB(255, 239, 239, 239), child: Column( crossAxisAlignment: CrossAxisAlignment.stretch, children: [ TextButton( child: Text('Copy'), onPressed: () => Clipboard.setData(ClipboardData(text: dataText)), ), SelectableText(dataText, textAlign: TextAlign.left) ]))); }

List _mrtdDataWidgets() { List list = []; if (_mrtdData == null) return list;

if (_mrtdData!.cardAccess != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.CardAccess',
      collapsedText: '',
      dataText: _mrtdData!.cardAccess!.toBytes().hex()));
}

if (_mrtdData!.cardSecurity != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.CardSecurity',
      collapsedText: '',
      dataText: _mrtdData!.cardSecurity!.toBytes().hex()));
}

if (_mrtdData!.sod != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.SOD',
      collapsedText: '',
      dataText: _mrtdData!.sod!.toBytes().hex()));
}

if (_mrtdData!.com != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.COM',
      collapsedText: '',
      dataText: formatEfCom(_mrtdData!.com!)));
}

if (_mrtdData!.dg1 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG1',
      collapsedText: '',
      dataText: formatMRZ(_mrtdData!.dg1!.mrz)));
}

if (_mrtdData!.dg2 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG2',
      collapsedText: '',
      dataText: _mrtdData!.dg2!.toBytes().hex()));
}

if (_mrtdData!.dg3 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG3',
      collapsedText: '',
      dataText: _mrtdData!.dg3!.toBytes().hex()));
}

if (_mrtdData!.dg4 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG4',
      collapsedText: '',
      dataText: _mrtdData!.dg4!.toBytes().hex()));
}

if (_mrtdData!.dg5 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG5',
      collapsedText: '',
      dataText: _mrtdData!.dg5!.toBytes().hex()));
}

if (_mrtdData!.dg6 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG6',
      collapsedText: '',
      dataText: _mrtdData!.dg6!.toBytes().hex()));
}

if (_mrtdData!.dg7 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG7',
      collapsedText: '',
      dataText: _mrtdData!.dg7!.toBytes().hex()));
}

if (_mrtdData!.dg8 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG8',
      collapsedText: '',
      dataText: _mrtdData!.dg8!.toBytes().hex()));
}

if (_mrtdData!.dg9 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG9',
      collapsedText: '',
      dataText: _mrtdData!.dg9!.toBytes().hex()));
}

if (_mrtdData!.dg10 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG10',
      collapsedText: '',
      dataText: _mrtdData!.dg10!.toBytes().hex()));
}

if (_mrtdData!.dg11 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG11',
      collapsedText: '',
      dataText: _mrtdData!.dg11!.toBytes().hex()));
}

if (_mrtdData!.dg12 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG12',
      collapsedText: '',
      dataText: _mrtdData!.dg12!.toBytes().hex()));
}

if (_mrtdData!.dg13 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG13',
      collapsedText: '',
      dataText: _mrtdData!.dg13!.toBytes().hex()));
}

if (_mrtdData!.dg14 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG14',
      collapsedText: '',
      dataText: _mrtdData!.dg14!.toBytes().hex()));
}

if (_mrtdData!.dg15 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG15',
      collapsedText: '',
      dataText: _mrtdData!.dg15!.toBytes().hex()));
}

if (_mrtdData!.aaSig != null) {
  list.add(_makeMrtdDataWidget(
      header: 'Active Authentication signature',
      collapsedText: '',
      dataText: _mrtdData!.aaSig!.hex()));
}

if (_mrtdData!.dg16 != null) {
  list.add(_makeMrtdDataWidget(
      header: 'EF.DG16',
      collapsedText: '',
      dataText: _mrtdData!.dg16!.toBytes().hex()));
}

return list;

}

@override Widget build(BuildContext context) { return Scaffold( backgroundColor: Colors.white,

    /*iosContentPadding: false,
iosContentBottomPadding: false,*/
    body: Material(
        child: SafeArea(
            child: Padding(
                padding: EdgeInsets.all(8.0),
                child: SingleChildScrollView(
                    controller: _scrollController,
                    child: Column(
                        crossAxisAlignment: CrossAxisAlignment.stretch,
                        children: <Widget>[
                          SizedBox(height: 20),
                          Row(children: <Widget>[
                            Text('NFC available:',
                                style: TextStyle(
                                    fontSize: 18.0,
                                    fontWeight: FontWeight.bold)),
                            SizedBox(width: 4),
                            Text(_isNfcAvailable ? "Yes" : "No",
                                style: TextStyle(fontSize: 18.0))
                          ]),
                          SizedBox(height: 40),
                          Padding(
                              padding: EdgeInsets.symmetric(
                                  vertical: 8.0, horizontal: 30.0),
                              child: Form(
                                key: _mrzData,
                                child: Column(
                                  crossAxisAlignment:
                                  CrossAxisAlignment.start,
                                  children: <Widget>[
                                    TextFormField(
                                      enabled: !_disabledInput(),
                                      controller: _docNumber,
                                      decoration: const InputDecoration(
                                          border: OutlineInputBorder(),
                                          labelText: 'Passport number',
                                          fillColor: Colors.white),
                                      inputFormatters: <TextInputFormatter>[
                                        FilteringTextInputFormatter.allow(
                                            RegExp(r'[A-Z0-9]+')),
                                        LengthLimitingTextInputFormatter(14)
                                      ],
                                      textInputAction: TextInputAction.done,
                                      textCapitalization:
                                      TextCapitalization.characters,
                                      autofocus: true,
                                      validator: (value) {
                                        if (value?.isEmpty ?? false) {
                                          return 'Please enter passport number';
                                        }
                                        return null;
                                      },
                                    ),
                                    SizedBox(height: 12),
                                    TextFormField(
                                        enabled: !_disabledInput(),
                                        controller: _dob,
                                        decoration: const InputDecoration(
                                            border: OutlineInputBorder(),
                                            labelText: 'Date of Birth',
                                            fillColor: Colors.white),
                                        autofocus: false,
                                        validator: (value) {
                                          if (value?.isEmpty ?? false) {
                                            return 'Please select Date of Birth';
                                          }
                                          return null;
                                        },
                                        onTap: () async {
                                          FocusScope.of(context)
                                              .requestFocus(FocusNode());
                                          // Can pick date which dates 15 years back or more
                                          final now = DateTime.now();
                                          final firstDate = DateTime(
                                              now.year - 90,
                                              now.month,
                                              now.day);
                                          final lastDate = DateTime(
                                              now.year - 15,
                                              now.month,
                                              now.day);
                                          final initDate = _getDOBDate();
                                          final date = await _pickDate(
                                              context,
                                              firstDate,
                                              initDate ?? lastDate,
                                              lastDate);

                                          FocusScope.of(context)
                                              .requestFocus(FocusNode());
                                          if (date != null) {
                                            _dob.text = date;
                                          }
                                        }),
                                    SizedBox(height: 12),
                                    TextFormField(
                                        enabled: !_disabledInput(),
                                        controller: _doe,
                                        decoration: const InputDecoration(
                                            border: OutlineInputBorder(),
                                            labelText: 'Date of Expiry',
                                            fillColor: Colors.white),
                                        autofocus: false,
                                        validator: (value) {
                                          if (value?.isEmpty ?? false) {
                                            return 'Please select Date of Expiry';
                                          }
                                          return null;
                                        },
                                        onTap: () async {
                                          FocusScope.of(context)
                                              .requestFocus(FocusNode());
                                          // Can pick date from tomorrow and up to 10 years
                                          final now = DateTime.now();
                                          final firstDate = DateTime(
                                              now.year,
                                              now.month,
                                              now.day + 1);
                                          final lastDate = DateTime(
                                              now.year + 10,
                                              now.month + 6,
                                              now.day);
                                          final initDate = _getDOEDate();
                                          final date = await _pickDate(
                                              context,
                                              firstDate,
                                              initDate ?? firstDate,
                                              lastDate);

                                          FocusScope.of(context)
                                              .requestFocus(FocusNode());
                                          if (date != null) {
                                            _doe.text = date;
                                          }
                                        })
                                  ],
                                ),
                              )),
                          SizedBox(height: 20),
                          TextButton(
                            // btn Read MRTD
                            onPressed: _disabledInput() ||
                                !_mrzData.currentState!.validate()
                                ? null
                                : _readMRTD,
                            child: Text(_isReading
                                ? 'Reading ...'
                                : 'Read Passport'),
                          ),
                          SizedBox(height: 4),
                          Text(_alertMessage,
                              textAlign: TextAlign.center,
                              style: TextStyle(
                                  fontSize: 15.0,
                                  fontWeight: FontWeight.bold)),
                          SizedBox(height: 15),
                          Padding(
                            padding: EdgeInsets.all(8.0),
                            child: Column(
                                crossAxisAlignment:
                                CrossAxisAlignment.start,
                                children: <Widget>[
                                  Text(
                                      _mrtdData != null
                                          ? "Passport Data:"
                                          : "",
                                      textAlign: TextAlign.center,
                                      style: TextStyle(
                                          fontSize: 15.0,
                                          fontWeight: FontWeight.bold)),
                                  Padding(
                                      padding: EdgeInsets.only(
                                          left: 16.0,
                                          top: 8.0,
                                          bottom: 8.0),
                                      child: Column(
                                          crossAxisAlignment:
                                          CrossAxisAlignment.start,
                                          children: _mrtdDataWidgets()))
                                ]),
                          ),
                        ]))))));

Padding _buildForm(BuildContext context) {
  return Padding(
      padding: EdgeInsets.symmetric(vertical: 8.0, horizontal: 30.0),
      child: Form(
        key: _mrzData,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            TextFormField(
              enabled: !_disabledInput(),
              controller: _docNumber,
              decoration: const InputDecoration(
                  border: OutlineInputBorder(),
                  labelText: 'Passport number',
                  fillColor: Colors.white),
              inputFormatters: <TextInputFormatter>[
                FilteringTextInputFormatter.allow(RegExp(r'[A-Z0-9]+')),
                LengthLimitingTextInputFormatter(14)
              ],
              textInputAction: TextInputAction.done,
              textCapitalization: TextCapitalization.characters,
              autofocus: true,
              validator: (value) {
                if (value?.isEmpty ?? false) {
                  return 'Please enter passport number';
                }
                return null;
              },
            ),
            SizedBox(height: 12),
            TextFormField(
                enabled: !_disabledInput(),
                controller: _dob,
                decoration: const InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Date of Birth',
                    fillColor: Colors.white),
                autofocus: false,
                validator: (value) {
                  if (value?.isEmpty ?? false) {
                    return 'Please select Date of Birth';
                  }
                  return null;
                },
                onTap: () async {
                  FocusScope.of(context).requestFocus(FocusNode());
                  // Can pick date which dates 15 years back or more
                  final now = DateTime.now();
                  final firstDate =
                  DateTime(now.year - 90, now.month, now.day);
                  final lastDate =
                  DateTime(now.year - 15, now.month, now.day);
                  final initDate = _getDOBDate();
                  final date = await _pickDate(
                      context, firstDate, initDate ?? lastDate, lastDate);

                  FocusScope.of(context).requestFocus(FocusNode());
                  if (date != null) {
                    _dob.text = date;
                  }
                }),
            SizedBox(height: 12),
            TextFormField(
                enabled: !_disabledInput(),
                controller: _doe,
                decoration: const InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Date of Expiry',
                    fillColor: Colors.white),
                autofocus: false,
                validator: (value) {
                  if (value?.isEmpty ?? false) {
                    return 'Please select Date of Expiry';
                  }
                  return null;
                },
                onTap: () async {
                  FocusScope.of(context).requestFocus(FocusNode());
                  // Can pick date from tomorrow and up to 10 years
                  final now = DateTime.now();
                  final firstDate =
                  DateTime(now.year, now.month, now.day + 1);
                  final lastDate =
                  DateTime(now.year + 10, now.month + 6, now.day);
                  final initDate = _getDOEDate();
                  final date = await _pickDate(
                      context, firstDate, initDate ?? firstDate, lastDate);

                  FocusScope.of(context).requestFocus(FocusNode());
                  if (date != null) {
                    _doe.text = date;
                  }
                })
          ],
        ),
      ));
}

} }

I really appreciate your help !!