2022-11-09 22:43:26 +00:00
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import 'package:hive/hive.dart';
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2022-11-04 19:32:02 +00:00
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import 'package:stack_wallet_backup/secure_storage.dart';
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2022-11-09 22:43:26 +00:00
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import 'package:stackwallet/hive/db.dart';
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2022-11-04 19:32:02 +00:00
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import 'package:stackwallet/utilities/logger.dart';
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const String _kKeyBlobKey = "swbKeyBlobKeyStringID";
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String _getMessageFromException(Object exception) {
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if (exception is IncorrectPassphrase) {
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return exception.errMsg();
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}
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if (exception is BadDecryption) {
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return exception.errMsg();
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}
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if (exception is InvalidLength) {
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return exception.errMsg();
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}
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if (exception is EncodingError) {
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return exception.errMsg();
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}
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return exception.toString();
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}
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class DPS {
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StorageCryptoHandler? _handler;
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StorageCryptoHandler get handler {
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if (_handler == null) {
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throw Exception(
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"DPS: attempted to access handler without proper authentication");
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}
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return _handler!;
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}
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2022-11-09 22:43:26 +00:00
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DPS();
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2022-11-04 19:32:02 +00:00
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Future<void> initFromNew(String passphrase) async {
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if (_handler != null) {
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throw Exception("DPS: attempted to re initialize with new passphrase");
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}
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try {
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_handler = await StorageCryptoHandler.fromNewPassphrase(passphrase);
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2022-11-09 22:43:26 +00:00
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final box = await Hive.openBox<String>(DB.boxNameDesktopData);
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await DB.instance.put<String>(
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boxName: DB.boxNameDesktopData,
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key: _kKeyBlobKey,
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value: await _handler!.getKeyBlob(),
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);
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await box.close();
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2022-11-04 19:32:02 +00:00
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} catch (e, s) {
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Logging.instance.log(
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"${_getMessageFromException(e)}\n$s",
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level: LogLevel.Error,
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);
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rethrow;
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}
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}
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Future<void> initFromExisting(String passphrase) async {
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if (_handler != null) {
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throw Exception(
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"DPS: attempted to re initialize with existing passphrase");
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}
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2022-11-09 22:43:26 +00:00
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final box = await Hive.openBox<String>(DB.boxNameDesktopData);
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final keyBlob = DB.instance.get<String>(
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boxName: DB.boxNameDesktopData,
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key: _kKeyBlobKey,
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);
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await box.close();
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if (keyBlob == null) {
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throw Exception(
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"DPS: failed to find keyBlob while attempting to initialize with existing passphrase");
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}
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try {
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_handler = await StorageCryptoHandler.fromExisting(passphrase, keyBlob);
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} catch (e, s) {
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Logging.instance.log(
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"${_getMessageFromException(e)}\n$s",
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level: LogLevel.Error,
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);
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2022-11-09 23:48:43 +00:00
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throw Exception(_getMessageFromException(e));
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2022-11-04 19:32:02 +00:00
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}
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}
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2022-11-11 16:45:50 +00:00
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Future<bool> verifyPassphrase(String passphrase) async {
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final box = await Hive.openBox<String>(DB.boxNameDesktopData);
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final keyBlob = DB.instance.get<String>(
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boxName: DB.boxNameDesktopData,
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key: _kKeyBlobKey,
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);
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await box.close();
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if (keyBlob == null) {
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// no passphrase key blob found so any passphrase is technically bad
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return false;
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}
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try {
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await StorageCryptoHandler.fromExisting(passphrase, keyBlob);
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// existing passphrase matches key blob
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return true;
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} catch (e, s) {
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Logging.instance.log(
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"${_getMessageFromException(e)}\n$s",
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level: LogLevel.Warning,
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);
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// password is wrong or some other error
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return false;
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}
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}
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2022-11-04 19:32:02 +00:00
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Future<bool> hasPassword() async {
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final keyBlob = DB.instance.get<String>(
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boxName: DB.boxNameDesktopData,
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key: _kKeyBlobKey,
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);
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return keyBlob != null;
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2022-11-04 19:32:02 +00:00
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}
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}
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