biometric_signature 2.1.2 biometric_signature: ^2.1.2 copied to clipboard
Flutter biometric functionality for cryptographic signing and encryption
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:biometric_signature/biometric_signature.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
final _biometricSignature = BiometricSignature();
@override
void initState() {
super.initState();
asyncInit();
}
Future<void> asyncInit() async {
try {
final String? biometricsType =
await _biometricSignature.biometricAuthAvailable();
debugPrint("biometricsType : $biometricsType");
// if (condition) {
// final bool? result = await _biometricSignature.deleteKeys();
// }
final bool doExist =
await _biometricSignature.biometricKeyExists() ?? false;
debugPrint("doExist : $doExist");
if (!doExist) {
final String? publicKey = await _biometricSignature.createKeys();
debugPrint("publicKey : $publicKey");
}
final String? signature = await _biometricSignature.createSignature(
options: {
"payload": "Biometric payload",
"promptMessage": "You are Welcome!"
});
debugPrint("signature : $signature");
} on PlatformException catch (e) {
debugPrint(e.message);
debugPrint(e.code);
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: const Center(
child: Text('Running'),
),
),
);
}
}