flutter_keychain 1.0.0

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  • Changelog
  • Example
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flutter_keychain #

A Flutter plugin for supporting secure storage of strings via Keychain and Keystore

If you have other types you want to store, you need to serialize to and from UTF-8 strings.

  • Keychain is used for iOS
  • AES encryption is used for Android. AES secret key is encrypted with RSA and RSA key is stored in KeyStore

Note KeyStore was introduced in Android 4.3 (API level 18). The plugin does not work on earlier versions.

Getting Started #

import 'package:flutter_keychain/flutter_keychain.dart';

// Get value
var value = await FlutterKeychain.get(key: "key");

// Put value
await FlutterKeychain.put(key: "key", value: "value");

// Remove item
await FlutterKeyChain.remove(key: "key");

// Clear the secure store
await FlutterKeyChain.clear();

Configure Android version #

In [project]/android/app/build.gradle set minSdkVersion to >= 18.

android {
    defaultConfig {
        minSdkVersion 18

Contributing #

For help on editing plugin code, view the documentation.

1.0.0 #

  • Bump kotlin, gradle and android version to support AndroidX.

0.0.8 #

  • Fix small issue with Kotlin String? type

0.0.7 #

  • Bump kotlin version to 1.2.51

0.0.6 #

  • Added commit to delete and clear for android.
  • Updated xcode example project, because of duplicate framework (new version of flutter)

0.0.3 - 0.0.5 #

  • Bugfixes and hardening of the code

0.0.2 #

  • Added iOS support (Objective-C for now)

0.0.1 #

  • Intial release with only Android support. iOS support due to follow.


import 'dart:async';

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

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  _MyAppState createState() => new _MyAppState();

class _MyAppState extends State<MyApp> {
  String _firstStart = 'Unknown';

  void initState() {

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      var firstStart = await FlutterKeychain.get(key: "firstStart");

      if (null == firstStart) {
        await FlutterKeychain.put(
            key: "firstStart", value: DateTime.now().toIso8601String());

      // If the widget was removed from the tree while the asynchronous platform
      // message was in flight, we want to discard the reply rather than calling
      // setState to update our non-existent appearance.
      if (!mounted) return;

      setState(() {
        if (null == firstStart) {
          _firstStart = "Was never started before. Restart and see .";
        } else {
          _firstStart = firstStart;
    } on Exception catch (ae) {
      print("Exception: " + ae.toString());

  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('Plugin example app'),
        body: new Center(
          child: new Text('First Start: $_firstStart\n'),

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flutter_keychain: ^1.0.0

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_keychain/flutter_keychain.dart';
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Learn more about scoring.

We analyzed this package on Apr 8, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Health suggestions

Format lib/generated/i18n.dart.

Run flutter format to format lib/generated/i18n.dart.

Maintenance suggestions

The package description is too short. (-12 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.

Package is getting outdated. (-9.32 points)

The package was last published 57 weeks ago.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8