flutter_string_encryption 0.3.1

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flutter_string_encryption #

Cross-platform string encryption using common best-practices (AES/CBC/PKCS5/Random IVs/HMAC-SHA256 Integrity Check).

It uses the format described in this article.

It currently uses Native Platform implementations, which are (we all hope) constantly vetted and updated by Apple and Google, with some really tiny library wrappers to ease some of the tedious work.

For the Android side, I used the following library (coming from the same authors of the article above): https://github.com/tozny/java-aes-crypto

For the iOS side, I implemented the format described in the article directly inside the native plugin, and used the following library to help me with Apple's CommonCrypto functions which are not really easy to interact with otherwise: https://github.com/sgl0v/SCrypto

Support #

In order to work on iOS, you need to bump the iOS support version up to 9.0. This can be done inside your ios project Podfile by uncommenting the very first line of the file:

# Uncomment this line to define a global platform for your project
platform :ios, '9.0'

Usage #

final cryptor = new PlatformStringCryptor();

Generate A Secret Key #

Randomly #

Generate it and store it in a safe place - e.g. the Keychain/KeyStore

final String key = await cryptor.generateRandomKey();

Password-Based #

Generate and (safely) store the salt, and then generate the key with a user-provided password before encrypting/decrypting your strings.

final password = "user_provided_password";
final String salt = await cryptor.generateSalt();
final String key = await cryptor.generateKeyFromPassword(password, salt);

Encrypt A String #

final String encrypted = await cryptor.encrypt("A string to encrypt.", key);

Decrypt A String #

try {
  final String decrypted = await cryptor.decrypt(encrypted, key);
  print(decrypted); // - A string to encrypt.
} on MacMismatchException {
  // unable to decrypt (wrong key or forged data)

License #

MIT (both this plugin and the used helper libraries).

[0.3.1] - Android - Migrate to Kotlin 1.3 and AndroidX

[0.2.0] - iOS - Cocoapods: Enable compilation as static framework

[0.1.0] - Make PlatformStringCryptor inheritable, fix minor Android compilation issues.

[0.0.2] - Fix Dart 2 issues

[0.0.1] - Initial Release


flutter_string_encryption_example #

Demonstrates how to use the flutter_string_encryption plugin.

Getting Started #

For help getting started with Flutter, view our online documentation.

Use this package as a library

1. Depend on it

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

  flutter_string_encryption: ^0.3.1

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_string_encryption/flutter_string_encryption.dart';
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Learn more about scoring.

We analyzed this package on Jan 25, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.0
  • pana: 0.13.4
  • Flutter: 1.12.13+hotfix.5

Health suggestions

Format lib/flutter_string_encryption.dart.

Run flutter format to format lib/flutter_string_encryption.dart.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.24.0 <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