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90 lines
3.3 KiB
90 lines
3.3 KiB
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:rsa_encrypt/rsa_encrypt.dart' as rsa;
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import 'package:pointycastle/api.dart' as crypto;
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class KeygenPage extends StatefulWidget {
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KeygenPage({Key key, this.title}) : super(key: key);
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final String title;
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@override
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_KeygenState createState() => _KeygenState();
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}
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class _KeygenState extends State<KeygenPage> {
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static crypto.AsymmetricKeyPair _keyPair;
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void _regenerateKey() {
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setState(() {
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_keyPair = rsa.getRsaKeyPair(rsa.RsaKeyHelper().getSecureRandom());
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});
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}
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String _getPublicKey() {
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if (_keyPair == null)
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return 'Press the button below to generate your key pair!';
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return '${rsa.RsaKeyHelper().encodePublicKeyToPemPKCS1(_keyPair.publicKey)}';
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}
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@override
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Widget build(BuildContext context) {
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// This method is rerun every time setState is called, for instance as done
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// by the _incrementCounter method above.
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//
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// The Flutter framework has been optimized to make rerunning build methods
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// fast, so that you can just rebuild anything that needs updating rather
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// than having to individually change instances of widgets.
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return Scaffold(
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appBar: AppBar(
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// Here we take the value from the MyHomePage object that was created by
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// the App.build method, and use it to set our appbar title.
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title: Text('RSA Key Configuration'),
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),
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body: Center(
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// Center is a layout widget. It takes a single child and positions it
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// in the middle of the parent.
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child: Column(
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// Column is also a layout widget. It takes a list of children and
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// arranges them vertically. By default, it sizes itself to fit its
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// children horizontally, and tries to be as tall as its parent.
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//
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// Invoke "debug painting" (press "p" in the console, choose the
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// "Toggle Debug Paint" action from the Flutter Inspector in Android
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// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
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// to see the wireframe for each widget.
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//
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// Column has various properties to control how it sizes itself and
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// how it positions its children. Here we use mainAxisAlignment to
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// center the children vertically; the main axis here is the vertical
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// axis because Columns are vertical (the cross axis would be
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// horizontal).
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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TextButton(
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onPressed: () => Clipboard.setData(
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new ClipboardData(
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text: _getPublicKey(),
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),
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).then((_) {
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ScaffoldMessenger.of(context).showSnackBar(SnackBar(
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content: Text("RSA public key copied to keyboard"),
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));
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}),
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child: Text(
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_getPublicKey(),
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style: Theme.of(context).textTheme.bodyText1,
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),
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style: Theme.of(context).outlinedButtonTheme.style,
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),
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ElevatedButton(
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onPressed: _regenerateKey,
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child: Text('Reset RSA Key'),
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style: Theme.of(context).elevatedButtonTheme.style,
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),
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],
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),
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),
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);
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}
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}
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