matrix-dart-sdk/lib/encryption/utils/olm_session.dart

67 lines
2.0 KiB
Dart

/*
* Famedly Matrix SDK
* Copyright (C) 2020, 2021 Famedly GmbH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import 'dart:convert';
import 'package:vodozemac/vodozemac.dart' as vod;
import 'package:matrix/encryption/utils/pickle_key.dart';
import 'package:matrix/matrix.dart';
class OlmSession {
String identityKey;
String? sessionId;
vod.Session? session;
DateTime? lastReceived;
final String key;
String? get pickledSession => session?.toPickleEncrypted(key.toPickleKey());
bool get isValid => session != null;
OlmSession({
required this.key,
required this.identityKey,
required this.sessionId,
required this.session,
required this.lastReceived,
});
OlmSession.fromJson(Map<String, dynamic> dbEntry, this.key)
: identityKey = dbEntry['identity_key'] ?? '' {
try {
try {
session = vod.Session.fromPickleEncrypted(
pickleKey: key.toPickleKey(),
pickle: dbEntry['pickle'],
);
} catch (_) {
session = vod.Session.fromOlmPickleEncrypted(
pickleKey: utf8.encode(key),
pickle: dbEntry['pickle'],
);
}
sessionId = dbEntry['session_id'];
lastReceived =
DateTime.fromMillisecondsSinceEpoch(dbEntry['last_received'] ?? 0);
assert(sessionId == session!.sessionId);
} catch (e, s) {
Logs().e('[LibOlm] Could not unpickle olm session', e, s);
}
}
}