asymmetric_crypto_primitives 0.2.0

Flutter plugin for signing and managing keys on different devices.

example/lib/main.dart

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

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  var isDeviceSecure = await AsymmetricCryptoPrimitives.checkIfDeviceSecure();
  if (isDeviceSecure) {
    var signer = await AsymmetricCryptoPrimitives.establishForEd25519();
    runApp(MyApp(
      signer: signer,
    ));
  }
}

class MyApp extends StatefulWidget {
  final signer;
  const MyApp({Key? key, this.signer}) : super(key: key);

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

class _MyAppState extends State<MyApp> {
  TextEditingController writeKeyController = TextEditingController();
  TextEditingController writeDataController = TextEditingController();
  TextEditingController readKeyController = TextEditingController();
  TextEditingController deleteKeyController = TextEditingController();
  TextEditingController editKeyController = TextEditingController();
  TextEditingController editDataController = TextEditingController();
  TextEditingController signDataController = TextEditingController();
  String writeResult = '';
  String readResult = '';
  String deleteResult = '';
  String editResult = '';
  String currentKey = '';
  String nextKey = '';
  String signature = '';
  late var signer;

  @override
  void initState() {
    signer = widget.signer;
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('storage example app'),
        ),
        body: SingleChildScrollView(
          child: Center(
              child: Column(
            children: [
              const Text(
                'Signer uuid:',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              Text(signer.uuid),
              const Divider(),
              const Text(
                'Current keys:',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              RawMaterialButton(
                onPressed: () async {
                  currentKey = await signer.getCurrentPubKey();
                  nextKey = await signer.getNextPubKey();
                  setState(() {});
                },
                child: const Text('Get keys!'),
              ),
              Text(currentKey),
              Text(nextKey),
              const Divider(),
              const Text(
                'Rotate keys:',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              RawMaterialButton(
                onPressed: () async {
                  await signer.rotateForEd25519();
                  currentKey = await signer.getCurrentPubKey();
                  nextKey = await signer.getNextPubKey();
                  setState(() {});
                },
                child: const Text('Rotate!'),
              ),
              const Divider(),
              const Text(
                'Sign data:',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              TextFormField(
                controller: signDataController,
                decoration: const InputDecoration(hintText: "data"),
              ),
              RawMaterialButton(
                onPressed: () async {
                  signature = await signer.sign(signDataController.text);
                  setState(() {});
                },
                child: const Text('Sign!'),
              ),
              Text(signature),
              const Divider(),
              const Text(
                'Clean up:',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              RawMaterialButton(
                onPressed: () async {
                  await AsymmetricCryptoPrimitives.cleanUp(signer);
                  setState(() {
                    currentKey = '';
                    nextKey = '';
                    signature = '';
                  });
                },
                child: const Text('Clean up!'),
              ),
              const Divider(
                thickness: 5,
              ),
              const Text(
                '1. Write',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              TextFormField(
                controller: writeKeyController,
                decoration: const InputDecoration(hintText: "key"),
              ),
              TextFormField(
                controller: writeDataController,
                decoration: const InputDecoration(hintText: "data"),
              ),
              RawMaterialButton(
                onPressed: () async {
                  if (writeDataController.text.isNotEmpty &&
                      writeKeyController.text.isNotEmpty) {
                    var result = await AsymmetricCryptoPrimitives.writeData(
                        writeKeyController.text, writeDataController.text);
                    if (result == true) {
                      setState(() {
                        writeResult = 'Success!';
                      });
                    } else {
                      setState(() {
                        writeResult = 'Failure!';
                      });
                    }
                  }
                },
                child: const Text('Write!'),
              ),
              Text(writeResult),
              const Divider(),
              const Text(
                '2. Read',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              TextFormField(
                controller: readKeyController,
                decoration: const InputDecoration(hintText: "key"),
              ),
              RawMaterialButton(
                onPressed: () async {
                  if (readKeyController.text.isNotEmpty) {
                    var result = await AsymmetricCryptoPrimitives.readData(
                        readKeyController.text);
                    if (result != false) {
                      setState(() {
                        readResult = result;
                      });
                    } else {
                      setState(() {
                        readResult = 'Failure!';
                      });
                    }
                  }
                },
                child: const Text('Read!'),
              ),
              Text(readResult),
              const Divider(),
              const Text(
                '3. Delete',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              TextFormField(
                controller: deleteKeyController,
                decoration: const InputDecoration(hintText: "key"),
              ),
              RawMaterialButton(
                onPressed: () async {
                  if (deleteKeyController.text.isNotEmpty) {
                    var result = await AsymmetricCryptoPrimitives.deleteData(
                        deleteKeyController.text);
                    if (result == true) {
                      setState(() {
                        deleteResult = "Deleted!";
                      });
                    } else {
                      setState(() {
                        deleteResult = "Failure!";
                      });
                    }
                  }
                },
                child: const Text('Delete!'),
              ),
              Text(deleteResult),
              const Divider(),
              const Text(
                '4. Edit',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 25),
              ),
              TextFormField(
                controller: editKeyController,
                decoration: const InputDecoration(hintText: "key"),
              ),
              TextFormField(
                controller: editDataController,
                decoration: const InputDecoration(hintText: "data"),
              ),
              RawMaterialButton(
                onPressed: () async {
                  if (editDataController.text.isNotEmpty &&
                      editKeyController.text.isNotEmpty) {
                    var result = await AsymmetricCryptoPrimitives.editData(
                        editKeyController.text, editDataController.text);
                    if (result == true) {
                      setState(() {
                        editResult = 'Success!';
                      });
                    } else {
                      setState(() {
                        editResult = 'Failure!';
                      });
                    }
                  }
                },
                child: const Text('Edit!'),
              ),
              Text(editResult),
              const Divider(),
            ],
          )),
        ),
      ),
    );
  }
}