Flutter加密解密插件openpgp的使用

好的，以下是关于Flutter加密解密插件openpgp的完整示例demo：

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

import 'package:openpgp/openpgp.dart';
import 'package:openpgp_example/encrypt_sign_decrypt_verify.dart';
import 'package:openpgp_example/encrypt_decrypt.dart';
import 'package:openpgp_example/encrypt_decrypt_bytes.dart';
import 'package:openpgp_example/encrypt_decrypt_file.dart';
import 'package:openpgp_example/encrypt_decrypt_symmetric.dart';
import 'package:openpgp_example/encrypt_decrypt_symmetric_bytes.dart';
import 'package:openpgp_example/generate.dart';
import 'package:openpgp_example/sign_verify.dart';
import 'package:openpgp_example/sign_verify_data.dart';
import 'package:openpgp_example/metadata.dart';
import 'package:openpgp_example/armor.dart';
import 'package:openpgp_example/convert.dart';
import 'package:openpgp_example/sign_verify_bytes.dart';
import 'package:openpgp_example/sign_verify_data_bytes.dart';

const passphrase = 'test';

void main() {
  if (!kIsWeb && (Platform.isLinux || Platform.isWindows)) {
    debugDefaultTargetPlatformOverride = TargetPlatform.fuchsia;
  }

  runApp(MyApp());
}

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

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

class _MyAppState extends State<MyApp> {
  final KeyPair _defaultKeyPair = KeyPair(publicKey, privateKey);

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('OpenPGP example app'),
        ),
        body: ListView(
          key: Key('list'),
          children: [
            EncryptAndDecrypt(
              title: "Encrypt And Decrypt",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-decrypt"),
            ),
            EncryptSignAndDecryptVerify(
              title: "EncryptSign And DecryptVerify",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-sign-decrypt-verify"),
            ),
            EncryptAndDecryptFile(
              title: "Encrypt And Decrypt file",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-decrypt-file"),
            ),
            EncryptAndDecryptBytes(
              title: "Encrypt And Decrypt Bytes",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-decrypt-bytes"),
            ),
            EncryptAndDecryptSymmetric(
              title: "Encrypt And Decrypt Symmetric",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-decrypt-symmetric"),
            ),
            EncryptAndDecryptSymmetricBytes(
              title: "Encrypt And Decrypt Symmetric Bytes",
              keyPair: _defaultKeyPair,
              key: Key("encrypt-decrypt-symmetric-bytes"),
            ),
            SignAndVerify(
              title: "Sign And Verify",
              keyPair: _defaultKeyPair,
              key: Key("sign-verify"),
            ),
            SignAndVerifyData(
              title: "Sign And Verify Data",
              keyPair: _defaultKeyPair,
              key: Key("sign-verify-data"),
            ),
            SignAndVerifyBytes(
              title: "Sign And Verify Bytes",
              keyPair: _defaultKeyPair,
              key: Key("sign-verify-bytes"),
            ),
            SignAndVerifyDataBytes(
              title: "Sign And Verify Data Bytes",
              keyPair: _defaultKeyPair,
              key: Key("sign-verify-data-bytes"),
            ),
            Generate(
              title: "Generate",
              key: Key("generate"),
            ),
            Convert(
              title: "Convert",
              key: Key("convert"),
              keyPair: _defaultKeyPair,
            ),
            Metadata(
              title: "Metadata",
              key: Key("metadata"),
              keyPair: _defaultKeyPair,
            ),
            Armor(
              title: "Armor",
              key: Key("armor"),
            ),
          ],
        ),
      ),
    );
  }
}