private async Task HandleMessage(SignalServiceEnvelope envelope) { var cipher = new SignalServiceCipher(new SignalServiceAddress(SignalLibHandle.Instance.Store.Username), new Store(), LibUtils.GetCertificateValidator()); // TODO: Starting to get messages of an unknown type which causes Decrypt to return null, so handle the null case for now. var content = cipher.Decrypt(envelope); long timestamp = Util.CurrentTimeMillis(); if (content == null) { //TODO callmessages Logger.LogWarning("HandleMessage() received unrecognized message"); return; } if (content.Message != null) { SignalServiceDataMessage message = content.Message; if (message.EndSession) { await HandleSessionResetMessage(envelope, content, message, false, timestamp); } else if (message.IsGroupUpdate()) { if (message.Group.Type == SignalServiceGroup.GroupType.UPDATE) { await HandleGroupUpdateMessage(envelope, content, message, false, timestamp); } else if (message.Group.Type == SignalServiceGroup.GroupType.QUIT) { await HandleGroupLeaveMessage(envelope, content, message, false, timestamp); } else if (message.Group.Type == SignalServiceGroup.GroupType.REQUEST_INFO) { Logger.LogWarning("Received REQUEST_INFO request"); } } else if (message.ExpirationUpdate) { await HandleExpirationUpdateMessage(envelope, content, message, false, timestamp); } else { await HandleSignalMessage(envelope, content, message, false, timestamp); } } else if (content.SynchronizeMessage != null) { if (content.SynchronizeMessage.Sent != null) { var syncMessage = content.SynchronizeMessage.Sent; var dataMessage = syncMessage.Message; if (dataMessage.EndSession) { await HandleSessionResetMessage(envelope, content, dataMessage, true, timestamp); } else if (dataMessage.IsGroupUpdate()) { if (dataMessage.Group.Type == SignalServiceGroup.GroupType.UPDATE) { await HandleGroupUpdateMessage(envelope, content, dataMessage, true, timestamp); } else if (dataMessage.Group.Type == SignalServiceGroup.GroupType.QUIT) { await HandleGroupLeaveMessage(envelope, content, dataMessage, true, timestamp); } else if (dataMessage.Group.Type == SignalServiceGroup.GroupType.REQUEST_INFO) { Logger.LogWarning("Received synced REQUEST_INFO request"); } } else if (dataMessage.ExpirationUpdate) { await HandleExpirationUpdateMessage(envelope, content, dataMessage, true, timestamp); } else { await HandleSignalMessage(envelope, content, dataMessage, true, timestamp); } } else if (content.SynchronizeMessage.Reads != null) { var readMessages = content.SynchronizeMessage.Reads; foreach (var readMessage in readMessages) { try { await HandleSyncedReadMessage(readMessage); } catch (Exception e) { Logger.LogError("HandleReadMessage failed: {0}\n{1}", e.Message, e.StackTrace); } } } else if (content.SynchronizeMessage.BlockedList != null) { List <string> blockedNumbers = content.SynchronizeMessage.BlockedList.Numbers; await HandleBlockedNumbers(blockedNumbers); } else if (content.SynchronizeMessage.Groups != null) { Logger.LogInformation("HandleMessage() handling groups sync message from device {0}", envelope.GetSourceDevice()); int read; var avatarBuffer = new byte[4096]; var groups = content.SynchronizeMessage.Groups; using (var tmpFile = LibUtils.CreateTmpFile("groups_sync")) { var plaintextStream = await MessageReceiver.RetrieveAttachment(Token, groups.AsPointer(), tmpFile, 10000, null); var deviceGroupsStream = new DeviceGroupsInputStream(plaintextStream); var groupsList = new List <(SignalGroup, IList <string>)>(); DeviceGroup g; while ((g = deviceGroupsStream.Read()) != null) { if (g.Avatar != null) { SignalServiceAttachmentStream ssas = g.Avatar.AsStream(); while ((read = ssas.InputStream.Read(avatarBuffer, 0, avatarBuffer.Length)) > 0) { } } var group = new SignalGroup() { ThreadDisplayName = g.Name, ThreadId = Base64.EncodeBytes(g.Id), GroupMemberships = new List <GroupMembership>(), CanReceive = true, ExpiresInSeconds = g.ExpirationTimer != null ? g.ExpirationTimer.Value : 0 }; groupsList.Add((group, g.Members)); } List <SignalConversation> dbGroups = await SignalDBContext.InsertOrUpdateGroups(groupsList); await SignalLibHandle.Instance.DispatchAddOrUpdateConversations(dbGroups); } } else if (content.SynchronizeMessage.Contacts != null && content.SynchronizeMessage.Contacts.Complete) //TODO incomplete updates { Logger.LogInformation("HandleMessage() handling contacts sync message from device {0}", envelope.GetSourceDevice()); int read; var avatarBuffer = new byte[4096]; ContactsMessage contacts = content.SynchronizeMessage.Contacts; using (var tmpFile = LibUtils.CreateTmpFile("contacts_sync")) { var plaintextStream = await MessageReceiver.RetrieveAttachment(Token, contacts.Contacts.AsPointer(), tmpFile, 10000, null); var deviceContactsStream = new DeviceContactsInputStream(plaintextStream); List <SignalContact> contactsList = new List <SignalContact>(); DeviceContact c; while ((c = deviceContactsStream.Read()) != null) { if (c.Avatar != null) { SignalServiceAttachmentStream ssas = c.Avatar.AsStream(); while ((read = ssas.InputStream.Read(avatarBuffer, 0, avatarBuffer.Length)) > 0) { } } SignalContact contact = new SignalContact() { ThreadDisplayName = c.Name, ThreadId = c.Number, Color = c.Color, CanReceive = true, ExpiresInSeconds = c.ExpirationTimer != null ? c.ExpirationTimer.Value : 0 }; contactsList.Add(contact); } var dbContacts = SignalDBContext.InsertOrUpdateContacts(contactsList); await SignalLibHandle.Instance.DispatchAddOrUpdateConversations(dbContacts); } } } else if (content.ReadMessage != null) { SignalServiceReceiptMessage receiptMessage = content.ReadMessage; Logger.LogTrace("HandleMessage() received ReceiptMessage (type={0}, when={1})", receiptMessage.ReceiptType, receiptMessage.When); } else { //TODO callmessages Logger.LogWarning("HandleMessage() received unrecognized message"); } }