Flutter数据加密插件flutter_aes_cipher的使用

简介

flutter_aes_cipher 是一个用于在 Flutter 应用中进行 AES 加密和解密的插件。它支持 Android 和 iOS 平台，并提供了简单易用的 API 来处理加密和解密操作。

使用步骤

1. 添加依赖

在 pubspec.yaml 文件中添加 flutter_aes_cipher 作为依赖项：

dependencies:
  flutter_aes_cipher: ^0.1.0

然后运行以下命令以安装依赖：

flutter pub get

2. 初始化插件

首先，确保插件已正确初始化并检查平台版本。以下是一个完整的示例代码：

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_aes_cipher/flutter_aes_cipher.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  String _encryptedText = '';
  String _decryptedText = '';

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
  }

  // 初始化插件并获取平台版本
  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await FlutterAesCipher.platformVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  // 加密文本
  Future<void> encryptText() async {
    final key = "1234567890123456"; // 16字节的密钥
    final iv = "1234567890123456"; // 16字节的初始向量

    try {
      final encrypted = await FlutterAesCipher.encrypt(key, iv, "Hello, World!");
      setState(() {
        _encryptedText = encrypted;
      });
    } catch (e) {
      setState(() {
        _encryptedText = e.toString();
      });
    }
  }

  // 解密文本
  Future<void> decryptText() async {
    final key = "1234567890123456"; // 16字节的密钥
    final iv = "1234567890123456"; // 16字节的初始向量

    try {
      final decrypted = await FlutterAesCipher.decrypt(key, iv, _encryptedText);
      setState(() {
        _decryptedText = decrypted;
      });
    } catch (e) {
      setState(() {
        _decryptedText = e.toString();
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('flutter_aes_cipher 示例'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
            // 显示平台版本
            Text('运行在平台: $_platformVersion\n'),
            ElevatedButton(
              onPressed: encryptText,
              child: Text('加密文本'),
            ),
            SizedBox(height: 16),
            Text('加密结果: $_encryptedText\n'),
            ElevatedButton(
              onPressed: decryptText,
              child: Text('解密文本'),
            ),
            SizedBox(height: 16),
            Text('解密结果: $_decryptedText\n'),
          ],
        ),
      ),
    );
  }
}