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message integrity

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This commit is contained in:
Christien Rioux 2024-05-31 18:27:50 -04:00
parent 490051a650
commit fd63a0d5e0
11 changed files with 370 additions and 237 deletions
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71
lib/chat/cubits/single_contact_messages_cubit.dart
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@ -1,6 +1,4 @@
import 'dart:async';
import 'dart:convert';
import 'dart:typed_data';
import 'package:async_tools/async_tools.dart';
import 'package:fast_immutable_collections/fast_immutable_collections.dart';
@ -10,7 +8,7 @@ import 'package:veilid_support/veilid_support.dart';
import '../../account_manager/account_manager.dart';
import '../../proto/proto.dart' as proto;
import '../models/models.dart';
import 'message_reconciliation.dart';
import 'reconciliation/reconciliation.dart';
class RenderStateElement {
RenderStateElement(
@ -102,12 +100,11 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
// Make crypto
Future<void> _initCrypto() async {
_messagesCrypto = await _activeAccountInfo
_conversationCrypto = await _activeAccountInfo
.makeConversationCrypto(_remoteIdentityPublicKey);
_localMessagesCryptoSystem =
await Veilid.instance.getCryptoSystem(_localMessagesRecordKey.kind);
_identityCryptoSystem =
await _activeAccountInfo.localAccount.identityMaster.identityCrypto;
_senderMessageIntegrity = await MessageIntegrity.create(
author: _activeAccountInfo.localAccount.identityMaster
.identityPublicTypedKey());
}
// Open local messages key
@ -119,7 +116,7 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
debugName: 'SingleContactMessagesCubit::_initSentMessagesCubit::'
'SentMessages',
parent: _localConversationRecordKey,
crypto: _messagesCrypto),
crypto: _conversationCrypto),
decodeElement: proto.Message.fromBuffer);
_sentSubscription =
_sentMessagesCubit!.stream.listen(_updateSentMessagesState);
@ -133,7 +130,7 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
debugName: 'SingleContactMessagesCubit::_initRcvdMessagesCubit::'
'RcvdMessages',
parent: _remoteConversationRecordKey,
crypto: _messagesCrypto),
crypto: _conversationCrypto),
decodeElement: proto.Message.fromBuffer);
_rcvdSubscription =
_rcvdMessagesCubit!.stream.listen(_updateRcvdMessagesState);
@ -222,31 +219,6 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
_renderState();
}
Future<Uint8List> _hashSignature(proto.Signature signature) async =>
(await _localMessagesCryptoSystem
.generateHash(signature.toVeilid().decode()))
.decode();
Future<void> _signMessage(proto.Message message) async {
// Generate data to sign
final data = Uint8List.fromList(utf8.encode(message.writeToJson()));
// Sign with our identity
final signature = await _identityCryptoSystem.sign(
_activeAccountInfo.localAccount.identityMaster.identityPublicKey,
_activeAccountInfo.userLogin.identitySecret.value,
data);
// Add to the message
message.signature = signature.toProto();
}
Future<Uint8List> _generateInitialId(
{required PublicKey identityPublicKey}) async =>
(await _localMessagesCryptoSystem
.generateHash(identityPublicKey.decode()))
.decode();
Future<void> _processMessageToSend(
proto.Message message, proto.Message? previousMessage) async {
// Get the previous message if we don't have one
@ -255,20 +227,12 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
? null
: await r.getProtobuf(proto.Message.fromBuffer, r.length - 1));
if (previousMessage == null) {
// If there's no last sent message,
// we start at a hash of the identity public key
message.id = await _generateInitialId(
identityPublicKey:
_activeAccountInfo.localAccount.identityMaster.identityPublicKey);
} else {
// If there is a last message, we generate the hash
// of the last message's signature and use it as our next id
message.id = await _hashSignature(previousMessage.signature);
}
message.id =
await _senderMessageIntegrity.generateMessageId(previousMessage);
// Now sign it
await _signMessage(message);
await _senderMessageIntegrity.signMessage(
message, _activeAccountInfo.userLogin.identitySecret.value);
}
// Async process to send messages in the background
@ -303,17 +267,17 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
// Generate state for each message
final sentMessagesMap =
IMap<String, DHTLogElementState<proto.Message>>.fromValues(
keyMapper: (x) => x.value.uniqueIdString,
IMap<String, OnlineElementState<proto.Message>>.fromValues(
keyMapper: (x) => x.value.authorUniqueIdString,
values: sentMessages.elements,
);
final reconciledMessagesMap =
IMap<String, proto.ReconciledMessage>.fromValues(
keyMapper: (x) => x.content.uniqueIdString,
keyMapper: (x) => x.content.authorUniqueIdString,
values: reconciledMessages.elements,
);
final sendingMessagesMap = IMap<String, proto.Message>.fromValues(
keyMapper: (x) => x.uniqueIdString,
keyMapper: (x) => x.authorUniqueIdString,
values: sendingMessages,
);
@ -405,9 +369,8 @@ class SingleContactMessagesCubit extends Cubit<SingleContactMessagesState> {
final TypedKey _remoteConversationRecordKey;
final TypedKey _remoteMessagesRecordKey;
late final VeilidCrypto _messagesCrypto;
late final VeilidCryptoSystem _localMessagesCryptoSystem;
late final VeilidCryptoSystem _identityCryptoSystem;
late final VeilidCrypto _conversationCrypto;
late final MessageIntegrity _senderMessageIntegrity;
DHTLogCubit<proto.Message>? _sentMessagesCubit;
DHTLogCubit<proto.Message>? _rcvdMessagesCubit;