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feat: cache encryption for sensitive data

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This commit is contained in:
Kingkor Roy Tirtho 2023-04-25 23:29:54 +06:00
parent 6760fe2437
commit b110d83456
2 changed files with 52 additions and 4 deletions
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2
lib/provider/authentication_provider.dart
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@ -79,7 +79,7 @@ class AuthenticationNotifier
bool get isLoggedIn => state != null;
AuthenticationNotifier() : super(null, "authentication");
AuthenticationNotifier() : super(null, "authentication", encrypted: true);
Timer? _refreshTimer;

54
lib/utils/persisted_state_notifier.dart
View File

@ -1,22 +1,70 @@
import 'dart:async';
import 'dart:convert';
import 'dart:typed_data';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:hive/hive.dart';
import 'package:spotube/utils/primitive_utils.dart';
const secureStorage = FlutterSecureStorage();
abstract class PersistedStateNotifier<T> extends StateNotifier<T> {
final String cacheKey;
final bool encrypted;
FutureOr<void> onInit() {}
PersistedStateNotifier(
super.state,
this.cacheKey,
) {
this.cacheKey, {
this.encrypted = false,
}) {
_load().then((_) => onInit());
}
Future<void> _load() async {
final box = await Hive.openLazyBox("spotube_cache");
final LazyBox box;
if (encrypted) {
String? boxName =
await secureStorage.read(key: "oss.krtirtho.spotube.box_name");
if (boxName == null) {
await secureStorage.write(
key: "oss.krtirtho.spotube.box_name",
value: ".spotube-${PrimitiveUtils.uuid.v4()}",
);
boxName =
await secureStorage.read(key: "oss.krtirtho.spotube.box_name");
} else {
boxName = ".spotube-$boxName";
}
final rawKey =
await secureStorage.read(key: "oss.krtirtho.spotube.$boxName");
Uint8List? encryptionKey =
rawKey == null ? null : base64Url.decode(rawKey);
if (encryptionKey == null) {
await secureStorage.write(
key: "oss.krtirtho.spotube.$boxName",
value: base64UrlEncode(Hive.generateSecureKey()),
);
encryptionKey = base64Url.decode(
(await secureStorage.read(key: "oss.krtirtho.spotube.$boxName"))!,
);
}
box = await Hive.openLazyBox(
boxName!,
encryptionCipher: HiveAesCipher(encryptionKey),
);
} else {
box = await Hive.openLazyBox("spotube_cache");
}
final json = await box.get(cacheKey);
if (json != null) {