jc_crypto_hashing 0.0.1

Android JCA backend for cryptographic operations using jnigen.

example/lib/main.dart

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

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

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _status = 'Initializing...';
  final _crypto = CryptoJCA();

  @override
  void initState() {
    super.initState();
    _runDemo();
  }

  Future<void> _runDemo() async {
    try {
      final data = Uint8List.fromList("Hello from JNI".codeUnits);
      final hash = await _crypto.digest(data);
      
      final key = await _crypto.generateSoftwareKey(bits: 256);
      final iv = CryptoJCA.generateIv();
      final encrypted = await _crypto.aesGcmEncrypt(data, iv, cryptoKey: key);
      final decrypted = await _crypto.aesGcmDecrypt(encrypted, iv, cryptoKey: key);
      
      if (!mounted) return;
      setState(() {
        _status = "JCA Ready!\n\nSHA-256: ${hash.length} bytes\nDecrypted: ${String.fromCharCodes(decrypted)}";
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _status = "Error: $e";
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(useMaterial3: true, colorSchemeSeed: Colors.blue),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('JCA Crypto Example'),
        ),
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Text(_status, textAlign: TextAlign.center, style: const TextStyle(fontSize: 18)),
          ),
        ),
      ),
    );
  }
}