Flutter数据加密插件encryptions的使用

一个用于在Android和iOS上使用原生AES / Argon2算法的插件。由于目前无法为Flutter插件运行自动测试，因此在示例中提供了一些测试用例：

测试平台：

• iOS模拟器（iPhone 5SE）
• Android（NX563J，Android 10）

开始使用

支持的算法：

• AES（128位或256位），ECB或CBC模式，无填充或PKCS5填充。请注意，如果您选择NoPadding，则必须确保您要加密的数据块大小必须是16的倍数（即AES块大小）。
• Argon2i, Argon2d, Argon2id

AES示例用法

Uint8List key256 = hex
    .decode("163928fb9615edf6005afc98d9fdbb3d830b3a286ebef64dd70be848f17bf9cc");
Uint8List iv = hex.decode("c1f6fd873e14050697c168b3e9da5db2");
Uint8List plain = hex.decode("01040000000300000002400000008b2e");

AES aes = AES.ofCBC(key256, iv, PaddingScheme.PKCS5Padding);
Uint8List encrypted = await aes.encrypt(plain);
Uint8List decrypted = await aes.decrypt(encrypted);

Argon2示例用法

Uint8List password = utf8.encode("password");
Uint8List salt = utf8.encode("helloworld");

Argon2 argon2 = Argon2(iterations: 16, hashLength: 64, memory: 256, parallelism: 2);
Uint8List hash = await argon2.argon2i(password, salt);

更多详情，请查看example/lib/test_case.dart。

完整示例Demo

以下是一个完整的示例Demo，展示了如何在Flutter应用中使用encryptions插件。

import 'package:encryptions_example/test_case.dart';
import 'package:encryptions_example/test_case_config.dart';
import 'package:flutter/material.dart';
import 'dart:async';

void main() => runApp(MyApp());

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

class _MyAppState extends State<MyApp> {
  Future<List<Report>> reports;

  [@override](/user/override)
  void initState() {
    super.initState();
    reports = test();
  }

  static const successStyle = TextStyle(fontSize: 16, color: Colors.green);
  static const errorStyle = TextStyle(fontSize: 16, color: Colors.red);
  static const padding = EdgeInsets.all(5.0);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Padding(
          padding: const EdgeInsets.only(top: 20.0, left: 5, right: 5),
          child: _renderReport(),
        ),
      ),
    );
  }

  Widget _renderTable(List<TableRow> rows) {
    return SingleChildScrollView(
      child: Table(
        border: new TableBorder.all(width: 1.0, color: Colors.grey),
        children: rows,
      ),
    );
  }

  TableRow _createRow(Report report) {
    return TableRow(key: ObjectKey(report.name), children: [
      TableCell(
        child: Padding(
          padding: padding,
          child: Text(
            "${report.name}",
            style: report.success ? successStyle : errorStyle,
          ),
        ),
      ),
    ]);
  }

  Widget _renderReport() {
    return FutureBuilder<List<Report>>(
      future: reports,
      builder: (_, snapshot) {
        switch (snapshot.connectionState) {
          case ConnectionState.done:
            if (snapshot.hasError) {
              print('got error! ${snapshot.error}');
              return Text("错误:${snapshot.error}");
            }
            print("完成! ${snapshot.data}");
            return _renderTable(snapshot.data.map((report) => _createRow(report)).toList());
          default:
            return Center(
              child: Text("正在测试..."),
            );
        }
      },
    );
  }

  Future<List<Report>> test() async {
    List<Report> reports = [];
    for (int i = 0; i < testCases.length; i++) {
      TestCase t = testCases[i];
      bool success;
      try {
        success = await t.execute();
      } catch (err, stack) {
        print(err);
        print(stack);
        success = false;
      }
      reports.add(Report(t.name, success));
    }
    return reports;
  }
}