138 lines
4.0 KiB
Dart
138 lines
4.0 KiB
Dart
// Copyright (c) 2020
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// Author: Hugo Pointcheval
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:native_crypto/native_crypto.dart';
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void main() => runApp(MyApp());
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class MyApp extends StatefulWidget {
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@override
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_MyAppState createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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final textController = TextEditingController();
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String _inputRawCoded = 'Message à chiffrer WOW';
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String _decryptedString = 'none';
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Uint8List aeskey;
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List<Uint8List> encryptedPayload;
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Uint8List decryptedPayload;
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void generateKey() async {
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aeskey = await NativeCrypto().sumKeygen();
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setState(() {
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_decryptedString = 'Key generated.';
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});
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}
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/// Returns bytes `Uint8List` from a `String`.
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Uint8List stringToBytes(String source) {
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var list = source.codeUnits;
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var bytes = Uint8List.fromList(list);
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return bytes;
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}
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/// Returns a `String` from bytes `Uint8List`.
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String bytesToString(Uint8List bytes) {
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var string = String.fromCharCodes(bytes);
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return string;
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}
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void encrypt() async {
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final plainText = _inputRawCoded;
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var output;
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if (plainText.isEmpty) {
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output = 'Entry is empty';
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} else {
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encryptedPayload = await NativeCrypto().symEncrypt(stringToBytes(plainText), aeskey);
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output = 'String successfully encrypted.';
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}
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setState(() {
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_decryptedString = output;
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});
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}
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void decrypt() async {
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final hardCodedAESkey = Uint8List.fromList([29, 4, 177, 73, 96, 186, 180, 218, 158, 84, 106, 158, 254, 34, 255, 5, 93, 213, 196, 102, 251, 70, 189, 184, 246, 170, 227, 143, 112, 168, 182, 65]);
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final hardCodedIOSCipher = Uint8List.fromList([31, 108, 97, 95, 23, 144, 222, 197, 157, 201, 161, 18, 1, 133, 110, 158, 132, 29, 104, 71, 72, 191, 67, 224, 88, 2, 63, 110, 92, 41, 190, 228]);
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final hardCodedIOSIv = Uint8List.fromList([145, 239, 253, 138, 83, 126, 213, 108, 42, 172, 200, 230, 243, 204, 121, 35]);
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// Test payload with some hardcoded values
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encryptedPayload = [hardCodedIOSCipher, hardCodedIOSIv];
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var output;
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if (encryptedPayload == null || encryptedPayload.isEmpty) {
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output = 'Encrypt before.';
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} else {
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decryptedPayload = await NativeCrypto().symDecrypt(encryptedPayload, hardCodedAESkey);
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output = 'String successfully Decrypted:\n${bytesToString(decryptedPayload)}';
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}
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setState(() {
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_decryptedString = output;
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});
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}
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@override
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void initState() {
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generateKey();
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super.initState();
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}
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void dispose() {
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// Clean up the controller when the widget is disposed.
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textController.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Native Crypto'),
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),
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body: Padding(
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padding: const EdgeInsets.fromLTRB(20, 10, 10, 20),
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child: Center(
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child: Column(
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children: <Widget>[
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Text(_inputRawCoded),
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SizedBox(height: 20),
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FlatButton(
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onPressed: null,
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color: Colors.blue,
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child: Text(
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'Encrypt',
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style: TextStyle(color: Colors.white),
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)),
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(encryptedPayload != null && encryptedPayload.isNotEmpty)
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? Text(encryptedPayload.first.toList().toString())
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: Container(),
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FlatButton(
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onPressed: decrypt,
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color: Colors.blue,
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child: Text(
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'Decrypt',
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style: TextStyle(color: Colors.white),
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)),
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(decryptedPayload != null && decryptedPayload.isNotEmpty)
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? Text(decryptedPayload.toList().toString())
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: Container(),
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SizedBox(height: 20),
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Text(_decryptedString),
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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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}
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