Flutter加密算法插件flutter_crypto_algorithm的使用

Flutter加密算法插件flutter_crypto_algorithm的使用

安装

运行以下命令以添加此插件到你的Flutter项目：

flutter pub add flutter_crypto_algorithm

使用

以下是一个完整的示例代码，演示如何在Flutter应用中使用flutter_crypto_algorithm插件进行AES加密和解密。

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

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _encrypt = '';
  String _decrypt = '';
  final _crypto = Crypto();

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

  // 平台消息异步处理，初始化时调用
  Future<void> crypto() async {
    String encrypt;
    String decrypt;
    try {
      encrypt = await _crypto.encrypt('Hello123', 'Hello') ?? 'Unknown encrypt';
      decrypt = await _crypto.decrypt(encrypt, 'Hello') ?? 'Unknown decrypt';
    } on PlatformException {
      encrypt = 'Failed encrypt.';
      decrypt = 'Failed decrypt.';
    }

    if (!mounted) return;

    setState(() {
      _encrypt = encrypt;
      _decrypt = decrypt;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Flutter Crypto Algorithm'),
        ),
        body: SingleChildScrollView(
          child: Column(
            children: [
              Section(title: 'AES', children: [
                _buildText('Encrypt: ', _encrypt),
                _buildText('Decrypt: ', _decrypt),
              ]),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildText(String label, String value) {
    return Text.rich(
      overflow: TextOverflow.ellipsis,
      maxLines: 2,
      TextSpan(
        text: label,
        style: const TextStyle(
            fontSize: 16, fontWeight: FontWeight.bold, color: Colors.red),
        children: [
          TextSpan(
            text: value,
            style: const TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.normal,
                color: Colors.black),
          ),
        ],
      ),
    );
  }
}

class Section extends StatelessWidget {
  final String title;
  final List<Widget> children;

  const Section({super.key, required this.title, required this.children});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            title,
            style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
          ),
          ...children,
        ],
      ),
    );
  }
}

更多关于Flutter加密算法插件flutter_crypto_algorithm的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter加密算法插件flutter_crypto_algorithm的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


flutter_crypto_algorithm 是一个用于在 Flutter 应用中执行加密算法的插件。它提供了多种加密算法的实现，如 AES、RSA、DES 等。以下是使用 flutter_crypto_algorithm 插件的基本步骤：

1. 添加依赖

首先，在 pubspec.yaml 文件中添加 flutter_crypto_algorithm 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_crypto_algorithm: ^1.0.0  # 请使用最新版本

然后运行 flutter pub get 来安装依赖。

2. 导入库

在需要使用加密算法的 Dart 文件中，导入 flutter_crypto_algorithm 库：

import 'package:flutter_crypto_algorithm/flutter_crypto_algorithm.dart';

3. 使用加密算法

flutter_crypto_algorithm 插件提供了多种加密算法的实现。以下是一些常见的使用示例：

AES 加密与解密

import 'package:flutter_crypto_algorithm/flutter_crypto_algorithm.dart';

void main() async {
  // AES 加密
  String plainText = "Hello, World!";
  String key = "my32lengthsupersecretnooneknows1";
  
  String encryptedText = await FlutterCryptoAlgorithm.aesEncrypt(plainText, key);
  print("Encrypted Text: $encryptedText");

  // AES 解密
  String decryptedText = await FlutterCryptoAlgorithm.aesDecrypt(encryptedText, key);
  print("Decrypted Text: $decryptedText");
}

RSA 加密与解密

import 'package:flutter_crypto_algorithm/flutter_crypto_algorithm.dart';

void main() async {
  // 生成 RSA 密钥对
  var keyPair = await FlutterCryptoAlgorithm.generateRSAKeyPair();
  
  String publicKey = keyPair.publicKey;
  String privateKey = keyPair.privateKey;

  // RSA 加密
  String plainText = "Hello, World!";
  String encryptedText = await FlutterCryptoAlgorithm.rsaEncrypt(plainText, publicKey);
  print("Encrypted Text: $encryptedText");

  // RSA 解密
  String decryptedText = await FlutterCryptoAlgorithm.rsaDecrypt(encryptedText, privateKey);
  print("Decrypted Text: $decryptedText");
}

DES 加密与解密

import 'package:flutter_crypto_algorithm/flutter_crypto_algorithm.dart';

void main() async {
  // DES 加密
  String plainText = "Hello, World!";
  String key = "mysecretkey";
  
  String encryptedText = await FlutterCryptoAlgorithm.desEncrypt(plainText, key);
  print("Encrypted Text: $encryptedText");

  // DES 解密
  String decryptedText = await FlutterCryptoAlgorithm.desDecrypt(encryptedText, key);
  print("Decrypted Text: $decryptedText");
}
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