secure_key_manager 1.1.0

secure_key_manager: ^1.1.0 copied to clipboard

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:secure_key_manager/secure_key_manager.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // No FlutterFire CLI, no firebase_options.dart, no google-services.json /
  // GoogleService-Info.plist. Just paste the config from the Firebase Console
  // (Project settings → Your apps → SDK setup and configuration) here.
  await SecureKeyManager.initialize(
    firebaseOptions: const FirebaseOptions(
      apiKey: 'YOUR_API_KEY',
      appId: 'YOUR_APP_ID',
      messagingSenderId: 'YOUR_SENDER_ID',
      projectId: 'YOUR_PROJECT_ID',
    ),
    region: 'asia-south1', // your Cloud Functions region
    cacheTtl: const Duration(minutes: 30),
  );

  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'secure_key_manager demo',
      theme: ThemeData(useMaterial3: true, colorSchemeSeed: Colors.indigo),
      home: const KeyDemoPage(),
    );
  }
}

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

  @override
  State<KeyDemoPage> createState() => _KeyDemoPageState();
}

class _KeyDemoPageState extends State<KeyDemoPage> {
  static const _keys = [
    'AGORA_APP_ID',
    'GOOGLE_MAPS_KEY',
    'OPENAI_API_KEY',
  ];

  String _keyName = _keys.first;
  String _status = 'Pick a key and tap Fetch.';
  bool _loading = false;

  Future<void> _fetch() async {
    setState(() {
      _loading = true;
      _status = 'Fetching $_keyName…';
    });
    try {
      final value = await SecureKeyManager.get(_keyName);
      // Never print real secrets in production logs — masked here for the demo.
      final masked = value.length <= 4
          ? '••••'
          : '${value.substring(0, 2)}••••${value.substring(value.length - 2)}';
      setState(() => _status = '$_keyName = $masked (len ${value.length})');
    } catch (e) {
      setState(() => _status = 'Error: $e');
    } finally {
      setState(() => _loading = false);
    }
  }

  Future<void> _logout() async {
    await FirebaseAuth.instance.signOut();
    SecureKeyManager.clearCache();
    setState(() => _status = 'Signed out and cache cleared.');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('SecureKeyManager')),
      body: Padding(
        padding: const EdgeInsets.all(24),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            DropdownButton<String>(
              value: _keyName,
              isExpanded: true,
              items: _keys
                  .map((k) => DropdownMenuItem(value: k, child: Text(k)))
                  .toList(),
              onChanged: _loading
                  ? null
                  : (v) => setState(() => _keyName = v ?? _keyName),
            ),
            const SizedBox(height: 16),
            FilledButton(
              onPressed: _loading ? null : _fetch,
              child: _loading
                  ? const SizedBox(
                      height: 18,
                      width: 18,
                      child: CircularProgressIndicator(strokeWidth: 2),
                    )
                  : const Text('Fetch key'),
            ),
            const SizedBox(height: 8),
            OutlinedButton(
              onPressed: _loading ? null : () => SecureKeyManager.evict(_keyName),
              child: Text('Evict $_keyName from cache'),
            ),
            const SizedBox(height: 8),
            OutlinedButton(
              onPressed: _loading ? null : _logout,
              child: const Text('Logout (clear cache)'),
            ),
            const SizedBox(height: 24),
            Text(_status, style: Theme.of(context).textTheme.bodyLarge),
          ],
        ),
      ),
    );
  }
}