store_critical_data 0.1.5

  • Readme
  • Changelog
  • Example
  • Installing
  • new53

store_critical_data #

A Flutter plugin to store critical data in secure storage:

  • 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 wouldn't work for earlier versions.

Getting Started #

import 'package:store_critical_data/store_critical_data.dart';

// Create storage
final _storage = new StoreCriticalData();

// write String value
_storage.writeString(key: “key”, value: “value”);

// Read String value
String value = _storage.readString(key: "key");

// write Double value
_storage.writeDouble(key: “key”, value: “value”);

// Read Double value
final double value = _storage.readDoubleNew(key: "key");

// Clear value
_storage.clear(key: "key");

// Clear All
 _storage.clearAll();

// Check if Key was store
 _storage.contains(key: "key");


Configure Android version #

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

android {
    ...

    defaultConfig {
        ...
        minSdkVersion 18
        ...
    }

}

Note : By default Android backups data on Google Drive. It can cause exception java.security.InvalidKeyException:Failed to unwrap key.

0.1.1 #

  • Secure Storage provides API to store data in secure storage. Keychain is used in iOS, KeyStore based solution is used in Android..

0.1.2 #

  • Package name updated to store_critical_data.
  • Updated documentation for Android and iOS libraries, classes, functions, and other API elements

0.1.3 #

  • Updated documentation for Android and iOS libraries, classes, functions, and other API elements

0.1.4 #

  • Added clear and clear All functionality.

0.1.5 #

  • Added function for check if a key was the store.

example/lib/main.dart

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

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  /// Create storage
  final _storage = StoreCriticalData();

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Impiger Secure Stroage Plugin'),
        ),
        body: SingleChildScrollView(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              Container(
                padding: EdgeInsets.symmetric(vertical: 10),
                alignment: Alignment.center,
                child: Text('Save Methods',
                    style:
                    TextStyle(fontSize: 25, fontWeight: FontWeight.w500)),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Write String value
                    _storage.writeString(key: "userName", value: "AntonyLeoRuban");
                  },
                  child:
                  Text("Save -> String",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Write Boolean value
                    _storage.writeBoolean(key: "isLogged", value: true);
                  },
                  child:
                  Text("Save -> Boolen",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Write Int value
                    _storage.writeInt(key: "intValue", value: 100);
                  },
                  child:
                  Text("Save -> Int",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Write Dobule value
                    _storage.writeDouble(key: "amout", value: 25852525);
                  },
                  child:
                  Text("Save -> Double",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              Container(
                padding: EdgeInsets.symmetric(vertical: 15),
                alignment: Alignment.center,
                child: Text('Load Methods',
                    style:
                    TextStyle(fontSize: 25, fontWeight: FontWeight.w500)),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Read String value
                    _storage.readString(key: "userName");
                  },
                  child:
                  Text("Load -> String",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Read Boolean value
                    _storage.readBoolean(key: "isLogged");
                  },
                  child:
                  Text("Load -> Boolen",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Read Int value
                    _storage.readInt(key: "intValue");
                  },
                  child:
                  Text("load -> Int",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Read Double value
                    _storage.readDoubleNew(key: "amout");
                  },
                  child:
                  Text("load -> Double",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              Container(
                padding: EdgeInsets.symmetric(vertical: 15),
                alignment: Alignment.center,
                child: Text('Clear Methods',
                    style:
                    TextStyle(fontSize: 25, fontWeight: FontWeight.w500)),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Clear value
                    _storage.clear(key: "userName");
                  },
                  child:
                  Text("Clear",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Clear All
                    _storage.clearAll();
                  },
                  child:
                  Text("ClearAll",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
              Container(
                padding: EdgeInsets.symmetric(vertical: 15),
                alignment: Alignment.center,
                child: Text('Check if Key was store',
                    style:
                    TextStyle(fontSize: 25, fontWeight: FontWeight.w500)),
              ),
              ButtonTheme(
                minWidth: 300.0,
                height: 44.0,
                child: RaisedButton(
                  onPressed: () {
                    // Check if Key was store
                    _storage.contains(key: "userName");
                  },
                  child:
                  Text("Contains",style:
                  TextStyle(color: Colors.white),),color: Colors.blue,padding: EdgeInsets.all(1.0),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Use this package as a library

1. Depend on it

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


dependencies:
  store_critical_data: ^0.1.5

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:store_critical_data/store_critical_data.dart';
  
Popularity:
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7
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
100
Overall:
Weighted score of the above. [more]
53
Learn more about scoring.

We analyzed this package on Jul 9, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.14
  • Flutter: 1.17.5

Analysis suggestions

Package does not support Flutter platform linux

Because:

  • package:store_critical_data/store_critical_data.dart that declares support for platforms: android, ios

Package does not support Flutter platform macos

Because:

  • package:store_critical_data/store_critical_data.dart that declares support for platforms: android, ios

Package does not support Flutter platform web

Because:

  • package:store_critical_data/store_critical_data.dart that declares support for platforms: android, ios

Package does not support Flutter platform windows

Because:

  • package:store_critical_data/store_critical_data.dart that declares support for platforms: android, ios

Package not compatible with SDK dart

Because:

  • store_critical_data that is a package requiring null.

Health suggestions

Format lib/store_critical_data.dart.

Run flutter format to format lib/store_critical_data.dart.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.12 1.14.13
meta 1.1.8 1.2.2
sky_engine 0.0.99
typed_data 1.1.6 1.2.0
vector_math 2.0.8 2.1.0-nullsafety
Dev dependencies
flutter_test