private async void HandleIncomingPublicMessageAsync(string json)
{
var packet = await JsonUtils.DeserializeAsync <PublicMessagePacket>(json);
if (packet == null)
{
return;
}
var chatRoom = _publicRooms.FirstOrDefault(r => r.Equals(packet.ChatRoom));
if (chatRoom == null)
{
return;
}
var decrypted = CryptUtils.AesDecryptBytes(packet.Content, chatRoom.PreSharedKey);
var signedJson = Config.DefaultEncoding.GetString(decrypted);
var message = await GetAndVerifySignedDataAsync <Message>(signedJson);
if (message?.Sender == null)
{
return;
}
OnKeepAliveReceived(message.Sender);
chatRoom.OnPublicMessageReceived(new MessageReceivedEventArgs(message.Sender, message));
}
public bool Equals(byte[] chatRoomIdentifier)
{
var decrypted = CryptUtils.AesDecryptBytes(chatRoomIdentifier, PreSharedKey);
if (decrypted == null)
{
return(false);
}
var encoded = Config.DefaultEncoding.GetString(decrypted);
return(encoded == Name);
}
private async void HandleIncomingInviteAsync(string json)
{
var packet = await JsonUtils.DeserializeAsync <InvitePacket>(json);
if (packet?.Content == null || packet.AesKey == null)
{
return;
}
Invite invite;
try
{
var aesKey = CryptUtils.RsaDecryptWithPrivate(packet.AesKey, 0, packet.AesKey.Length,
_personalIdentity.KeyPair.Private);
var decrypted = CryptUtils.AesDecryptBytes(packet.Content, aesKey);
var signedDataJson = Config.DefaultEncoding.GetString(decrypted);
invite = await GetAndVerifySignedDataAsync <Invite>(signedDataJson);
if (invite?.Name == null ||
invite.PreSharedKey == null ||
invite.Sender?.Name == null ||
invite.Sender.PublicKey == null)
{
return;
}
}
catch (CryptographicException)
{
return;
}
catch (InvalidCipherTextException)
{
return;
}
OnKeepAliveReceived(invite.Sender);
OnInviteReceived(invite.Name, invite.PreSharedKey, invite.Sender);
}
