flutter_encryption_helper

Easy-to-use, cross-platform AES-GCM encryption/decryption utilities for Dart and Flutter.

• Platforms: iOS, Android, Web, Windows, macOS, Linux
• WASM compatible: Yes (via package:cryptography)

Install

dart pub add flutter_encryption_helper

Quick start

import 'dart:convert';
import 'package:cryptography/cryptography.dart';
import 'package:flutter_encryption_helper/flutter_encryption_helper.dart';

Future<void> main() async {
  final helper = AesGcmHelper();
  final key = await helper.generateKey();

  final data = utf8.encode('secret');
  final combined = await helper.encrypt(data, secretKey: key);
  final clear = await helper.decrypt(combined, secretKey: key);
  print(utf8.decode(clear));
}

API Highlights

• AesGcmHelper.generateKey() – create a secure 256-bit key
• AesGcmHelper.encrypt() – returns nonce + ciphertext + mac combined
• AesGcmHelper.decrypt() – accepts the combined format from encrypt()
• AesGcmHelper.encryptDetached() – returns SecretBox for custom handling

Platforms & WASM

This package uses package:cryptography, which provides implementations compatible with Flutter and Web/WASM environments. No native setup required.

License

MIT © Dhia Bechattaoui