webcrypto 0.5.7
webcrypto: ^0.5.7 copied to clipboard
Cross-platform implementation of Web Cryptography APIs for Flutter.
// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:convert' show utf8;
import 'package:convert/convert.dart' show hex;
import 'package:webcrypto/webcrypto.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String _output = '-';
final _input = TextEditingController();
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('SHA-1 Hashing'),
),
body: Container(
padding: EdgeInsets.all(10),
child: Column(
children: [
Text(
'Compute SHA-1 hash of input below.\n\n'
'Click the button to refresh the computed output.'
'Output will be displayed in hexadecimal encoding.',
),
Text(
'input',
textScaleFactor: 1.2,
style: TextStyle(fontWeight: FontWeight.bold),
),
_textEntry(),
SizedBox(height: 50),
Text(
'output',
textScaleFactor: 1.2,
style: TextStyle(fontWeight: FontWeight.bold),
),
Text('$_output'),
],
),
),
),
);
}
Widget _textEntry() {
return Row(
children: <Widget>[
Expanded(
child: TextField(
controller: _input,
autofocus: true,
autocorrect: false,
enableSuggestions: false,
),
),
IconButton(
icon: Icon(Icons.autorenew),
tooltip: 'compute hash',
onPressed: _refreshHash,
)
],
);
}
Future<void> _refreshHash() async {
final result = await Hash.sha1.digestBytes(utf8.encode(_input.text));
setState(() {
_output = hex.encode(result);
});
}
}