V1 - Personal Account and Budgeting Done

Personal Account and Budgeting

kifi-app/lib/core/security/crypto_service.dart

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+import 'package:encrypt/encrypt.dart';
+import 'package:pointycastle/asymmetric/api.dart';
+import 'package:dio/dio.dart';
+import '../network/dio_client.dart';
+
+class CryptoService {
+  static final CryptoService _instance = CryptoService._internal();
+  factory CryptoService() => _instance;
+  CryptoService._internal();
+
+  RSAPublicKey? _publicKey;
+
+  Future<void> fetchPublicKey() async {
+    try {
+      final dio = Dio(BaseOptions(
+        baseUrl: DioClient().dio.options.baseUrl,
+        connectTimeout: const Duration(seconds: 10),
+        receiveTimeout: const Duration(seconds: 10),
+      ));
+      final response = await dio.get('/auth/public-key');
+      final publicKeyBase64 = response.data['publicKey'] as String;
+      _publicKey = RSAKeyParser().parse('-----BEGIN PUBLIC KEY-----\n$publicKeyBase64\n-----END PUBLIC KEY-----') as RSAPublicKey;
+    } catch (e) {
+      throw Exception('Failed to fetch public key: $e');
+    }
+  }
+
+  String encrypt(String plainText) {
+    if (_publicKey == null) {
+      throw Exception('Public key not initialized. Call fetchPublicKey() first.');
+    }
+    final encrypter = Encrypter(RSA(publicKey: _publicKey));
+    final encrypted = encrypter.encrypt(plainText);
+    return encrypted.base64;
+  }
+
+  bool get isInitialized => _publicKey != null;
+}