famedlysdk/lib/encryption/utils/session_key.dart

80 lines
2.6 KiB
Dart

/*
* Famedly Matrix SDK
* Copyright (C) 2019, 2020 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:olm/olm.dart' as olm;
import '../../famedlysdk.dart';
import '../../src/database/database.dart' show DbInboundGroupSession;
import '../../src/utils/logs.dart';
class SessionKey {
Map<String, dynamic> content;
Map<String, int> indexes;
olm.InboundGroupSession inboundGroupSession;
final String key;
List<dynamic> get forwardingCurve25519KeyChain =>
content['forwarding_curve25519_key_chain'] ?? [];
String get senderClaimedEd25519Key =>
content['sender_claimed_ed25519_key'] ?? '';
String get senderKey => content['sender_key'] ?? '';
bool get isValid => inboundGroupSession != null;
SessionKey({this.content, this.inboundGroupSession, this.key, this.indexes});
SessionKey.fromDb(DbInboundGroupSession dbEntry, String key) : key = key {
final parsedContent = Event.getMapFromPayload(dbEntry.content);
final parsedIndexes = Event.getMapFromPayload(dbEntry.indexes);
content =
parsedContent != null ? Map<String, dynamic>.from(parsedContent) : null;
indexes = parsedIndexes != null
? Map<String, int>.from(parsedIndexes)
: <String, int>{};
inboundGroupSession = olm.InboundGroupSession();
try {
inboundGroupSession.unpickle(key, dbEntry.pickle);
} catch (e, s) {
dispose();
Logs.error(
'[LibOlm] Unable to unpickle inboundGroupSession: ' + e.toString(),
s);
}
}
Map<String, dynamic> toJson() {
final data = <String, dynamic>{};
if (content != null) {
data['content'] = content;
}
if (indexes != null) {
data['indexes'] = indexes;
}
data['inboundGroupSession'] = inboundGroupSession.pickle(key);
return data;
}
void dispose() {
inboundGroupSession?.free();
inboundGroupSession = null;
}
@override
String toString() => json.encode(toJson());
}