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added initial RSA keypair generation

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This commit is contained in:
Zachary Atkins 2021-04-10 10:26:20 -05:00
parent 25c77260f2
commit 5bff5a0c42
6 changed files with 218 additions and 98 deletions
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103
loc_chain_app/lib/main.dart
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@ -1,113 +1,20 @@
import 'package:flutter/material.dart';
import 'package:loc_chain_app/widgets/navbar.dart';
void main() {
runApp(MyApp());
runApp(App());
}
class MyApp extends StatelessWidget {
class App extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
primarySwatch: Colors.lightBlue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
home: NavBarWidget(),
);
}
}

52
loc_chain_app/lib/pages/home.dart Normal file
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@ -0,0 +1,52 @@
import 'package:flutter/material.dart';
class HomePage extends StatefulWidget {
HomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}

89
loc_chain_app/lib/pages/keygen.dart Normal file
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@ -0,0 +1,89 @@
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:rsa_encrypt/rsa_encrypt.dart' as rsa;
import 'package:pointycastle/api.dart' as crypto;
class KeygenPage extends StatefulWidget {
KeygenPage({Key key, this.title}) : super(key: key);
final String title;
@override
_KeygenState createState() => _KeygenState();
}
class _KeygenState extends State<KeygenPage> {
static crypto.AsymmetricKeyPair _keyPair;
void _regenerateKey() {
setState(() {
_keyPair = rsa.getRsaKeyPair(rsa.RsaKeyHelper().getSecureRandom());
});
}
String _getPublicKey() {
if (_keyPair == null)
return 'Press the button below to generate your key pair!';
return '${rsa.RsaKeyHelper().encodePublicKeyToPemPKCS1(_keyPair.publicKey)}';
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text('RSA Key Configuration'),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextButton(
onPressed: () => Clipboard.setData(
new ClipboardData(
text: _getPublicKey(),
),
).then((_) {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text("RSA public key copied to keyboard"),
));
}),
child: Text(
_getPublicKey(),
style: Theme.of(context).textTheme.bodyText1,
),
style: Theme.of(context).outlinedButtonTheme.style,
),
ElevatedButton(
onPressed: _regenerateKey,
child: Text('Reset RSA Key'),
style: Theme.of(context).elevatedButtonTheme.style,
),
],
),
),
);
}
}

50
loc_chain_app/lib/widgets/navbar.dart Normal file
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@ -0,0 +1,50 @@
import 'package:flutter/material.dart';
import 'package:loc_chain_app/pages/home.dart';
import 'package:loc_chain_app/pages/keygen.dart';
class NavBarWidget extends StatefulWidget {
NavBarWidget({Key key}) : super(key: key);
@override
_NavBarWidgetState createState() => _NavBarWidgetState();
}
class _NavBarWidgetState extends State<NavBarWidget> {
int _selectedIndex = 0;
StatefulWidget _selectedWidget;
static List<Widget> pages = <Widget>[
HomePage(
title: 'Home',
),
KeygenPage(
title: 'RSA Configuration',
),
];
void _onItemTapped(int index) => setState(() {
_selectedIndex = index;
_selectedWidget = pages[_selectedIndex];
});
@override
Widget build(context) => Scaffold(
body: _selectedWidget,
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home_rounded),
label: 'Home',
backgroundColor: Colors.cyan,
),
BottomNavigationBarItem(
icon: Icon(Icons.lock_rounded),
label: 'RSA Configuration',
backgroundColor: Colors.cyan,
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.lightBlueAccent,
unselectedItemColor: Colors.lightBlue[200],
onTap: _onItemTapped,
),
);
}

21
loc_chain_app/pubspec.lock
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@ -1,6 +1,13 @@
# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
asn1lib:
dependency: transitive
description:
name: asn1lib
url: "https://pub.dartlang.org"
source: hosted
version: "0.8.1"
async:
dependency: transitive
description:
@ -88,6 +95,20 @@ packages:
url: "https://pub.dartlang.org"
source: hosted
version: "1.8.0"
pointycastle:
dependency: transitive
description:
name: pointycastle
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.1"
rsa_encrypt:
dependency: "direct main"
description:
name: rsa_encrypt
url: "https://pub.dartlang.org"
source: hosted
version: "1.0.5"
sky_engine:
dependency: transitive
description: flutter

1
loc_chain_app/pubspec.yaml
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@ -28,6 +28,7 @@ dependencies:
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.2
rsa_encrypt: ^1.0.5
dev_dependencies:
flutter_test: