string_encryption 2.0.5

Cross-platform string encryption using common best-practices.

example/lib/main.dart

import 'package:flutter/material.dart';

import 'package:string_encryption/string_encryption.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

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

class _MyAppState extends State<MyApp> {
  String _randomKey = 'Unknown';
  String _string = "Unknown";
  String _encrypted = "Unknown";

  @override
  initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  initPlatformState() async {
    final cryptor = StringEncryption();

    final key = await cryptor.generateRandomKey();
    // ignore: avoid_print
    print("randomKey: $key");

    const string = "here is the string, here is the string.";
    final encrypted = await cryptor.encrypt(string, key!);
    final decrypted = await cryptor.decrypt(encrypted!, key);

    assert(decrypted == string);

    const wrongKey = 'jIkj0VOLhFpOJSpI7SibjA==:RZ03+kGZ/9Di3PT0a3xUDibD6gmb2RIhTVF+mQfZqy0=';

    try {
      await cryptor.decrypt(encrypted, wrongKey);
    } on MacMismatchException {
      // ignore: avoid_print
      print('wrongly decrypted');
    }

    const salt = "Ee/aHwc6EfEactQ00sm/0A=="; // await cryptor.generateSalt();
    const password = "a_strong_password%./😋";
    final generatedKey = await cryptor.generateKeyFromPassword(password, salt);
    // ignore: avoid_print
    print("salt: $salt, key: $generatedKey");

    assert(generatedKey == wrongKey);

    setState(() {
      _randomKey = key;
      _string = string;
      _encrypted = encrypted;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text(
              'Random key: $_randomKey\n\nString: $_string\n\nEncrypted: $_encrypted'),
        ),
      ),
    );
  }
}