internal async Task SendPublicMessageAsync(PublicChatRoom chatRoom, string content)
{
if (_disposed)
{
throw new ObjectDisposedException(null);
}
if (!_publicRooms.Contains(chatRoom))
{
throw new NotSupportedException("Enter ChatRoom first.");
}
try
{
var message = new Message
{
Content = content,
Sender = _publicIdentity,
TimeStamp = DateTimeOffset.Now.ToUnixTimeSeconds()
};
var signedData = await CreateSignAndEncodeDataAsync(message);
var encrypted = CryptUtils.AesEncryptByteArray(signedData, chatRoom.PreSharedKey);
var chatRoomIdentifier = chatRoom.GetEncryptedIdentifier();
var packet = new PublicMessagePacket(encrypted, chatRoomIdentifier);
await _networkHandler.SendPacketAsync(packet);
}
catch (Exception) when(_disposed)
{
}
}
internal async Task SendInviteAsync(string name, byte[] preSharedKey, UserIdentity receiver)
{
if (_disposed)
{
throw new ObjectDisposedException(null);
}
try
{
var invite = new Invite
{
Name = name,
PreSharedKey = preSharedKey,
Sender = _publicIdentity
};
var signedData = await CreateSignAndEncodeDataAsync(invite);
var publicKey = PemUtils.GetKeyFromPem(receiver.PublicKey);
var aesKey = CryptUtils.GenrateAesKey();
var encryptedAesKey = CryptUtils.RsaEncryptWithPublic(aesKey, publicKey);
var encryptedData = CryptUtils.AesEncryptByteArray(signedData, aesKey);
var packet = new InvitePacket(encryptedData, encryptedAesKey);
await _networkHandler.SendPacketAsync(packet);
}
catch (Exception) when(_disposed)
{
}
}
internal byte[] GetEncryptedIdentifier()
{
var encrypted = CryptUtils.AesEncryptByteArray(_nameBytes, PreSharedKey);
return(encrypted);
}
