README.md

Flutter elliptic curve keypair

This Flutter plugin provides means to perform encrypt data using ellitic curve keypair algorthm,encapsulated with biometric crypto and get the public key to validate.

Supported Platforms

• Android
• IOS

Features

• Encrypt data using ellitic curve keypair algorthm
• Get public key to validate signed data (Can be used in server side to validate)
• Support Arabic and English (Only for android)

Usage in Dart

# add this line to your pubspec.yaml
flutter_elliptic_curve_keypair: ^0.0.1

// Import the relevant plugin:
import 'package:flutter_elliptic_curve_keypair/flutter_elliptic_curve_keypair.dart';

To encrypt data

Future<void> encryptData() async {
    try {

      String dataToSign = "data_to_sign"; // data to encript
      String language = "en"; // support english and arabic (only for android) "en" => english & "ar" => Arabic
      String alias = "your_alias_name"; // key pair alias

     EccResultModel signedData =
          await FlutterEllipticCurveKeyPair.ellipticCurveKeyPairSigning(
        message: dataToSign,
        language: language,
        alias: alias,
      );

      if (signedData.success) {
        setState(() {
          signed = "SUCCEESS, SIGNED DATA HERE => ${signedData.data}";
        });
      } else {
        setState(() {
          public = "FAILED, ERROR => ${signedData.data.toString()}";
        });
      }

    } on PlatformException catch (e) {
      print("Unexpected error occured$e");
    }
  }

To get public key

Future<void> ellipticCurveKeyPairPublicKey() async {
    try {
      EccResultModel publicKey =
          await FlutterEllipticCurveKeyPair.ellipticCurveKeyPairPublicKey();

      if (publicKey.success) {
        setState(() {
          public = "SUCCEESS, PUBLIC KEY HERE => ${publicKey.data}";
        });
      } else {
        setState(() {
          signed = "FAILED, ERROR => ${publicKey.data.toString()}";
        });
      }

    } on PlatformException catch (e) {
      print("Unexpected error occured$e");
    }
  }

Android integration

Update your MainActivity.kt

    // package com.plugin.elliptic_curve_key_pair ** use your app bundle id here **

    import io.flutter.embedding.android.FlutterFragmentActivity
    import io.flutter.embedding.engine.FlutterEngine
    import io.flutter.plugins.GeneratedPluginRegistrant


    class MainActivity: FlutterFragmentActivity() {
        override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine)
        }
    }

Update app permission

<uses-permission android:name="android.permission.USE_BIOMETRIC" />

IOS integration

Update info.plist file and add permission for access biometric

<key>NSFaceIDUsageDescription</key>
<string>Would like to use Face ID for authetication</string>