encrypted_asset_image

Description:

encrypted asset image

Features #
A widget displays an encrypted image from the asset folder. The best package is to secure your local
resource. It commonly uses in some apps such as Home Workout, Math Riddles and Puzzles, English
Learning,...
Reference:

📁 FileCryptor (https://github.com/webdastur/file_cryptor)

Getting started #
You should ensure that you add the router as a dependency in your flutter project.
dependencies:
encrypted_asset_image: ^0.0.1
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You should then run flutter pub get. Don't forget to declare assets resource in pubspec.yaml.
flutter:
assets:
- assets/
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Example Project #
There is a example project in the example folder. Check it out. However, to encrypt image, you can
check out in crypto_example folder.
Usage #
1 - Generate an encrypted image #
import 'dart:io';
import 'package:file_cryptor/src/file_cryptor.dart';

void main() async {
// Init file crypto with key length = 32
FileCryptor fileCryptor = FileCryptor(
key: "VihW5CNfR9Fmhgz6b5AbUDQPsAzRWCA8",
iv: 16,
dir: "crypto_example",
);
const fileName = 'logo_image.png';

// Encrypt file and calculate executed time
var stopwatch1 = Stopwatch()..start();

File encryptedFile = await fileCryptor.encrypt(
inputFile: "raw/$fileName", outputFile: "encrypt/$fileName");

print('Encryption executed in ${stopwatch1.elapsed}');
print('Encrypted file path: ${encryptedFile.absolute}');

// Decrypt file and calculate executed time
var stopwatch2 = Stopwatch()..start();

File decryptedFile = await fileCryptor.decrypt(
inputFile: "encrypt/$fileName", outputFile: "decrypt/$fileName");

print('Decryption executed in ${stopwatch2.elapsed}');
print('Decrypted file path: ${decryptedFile.absolute}');
}
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2 - EncryptedAssetImage #
Basic widget
final FileCryptor fileCryptor = FileCryptor(
key: 'VihW5CNfR9Fmhgz6b5AbUDQPsAzRWCA8', // This is your key with a length equal to 32
iv: 16, // iv is Initialization vector encryption times
dir: 'example', // Not required for this widget
);
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new EncryptedAssetImage(
assetPath: 'assets/encrypted_logo_image.png',
fileCryptor: fileCryptor)
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Complete example
import 'package:encrypted_asset_image/encrypted_asset_image.dart';
import 'package:flutter/material.dart';

class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);

@override
State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
late final FileCryptor fileCryptor;

@override
void initState() {
fileCryptor = FileCryptor(
key: 'VihW5CNfR9Fmhgz6b5AbUDQPsAzRWCA8', // This is your key with a length equal to 32
iv: 16, // iv is Initialization vector encryption times
dir: '', // Not required for this widget
);
super.initState();
}

@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Encrypted Asset Image Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: EncryptedAssetImage(
assetPath: 'assets/encrypted_logo_image.png',
fileCryptor: fileCryptor)),
Expanded(
child: EncryptedAssetImage(
assetPath: 'assets/encrypted_dash_image.png',
fileCryptor: fileCryptor))
],
),
),
);
}
}
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Additional information #
You can follow me on Linkedin [DuocNP] (https://www.linkedin.com/in/duocnguyen6799)