private async static void requestReceived(TCPSocket sender)
{
await uiThreadDispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
try
{
progressIndeterminate();
sender.ProgressRepport += (x) => { if (ProgressRepport != null) ProgressRepport(x); };
string requestContents = await sender.Recv();
progressStop();
Request receivedRequest = JSONHandling.ParseJSONResponse<Request>(requestContents);
await requestHandlerMap[receivedRequest.Type](receivedRequest.SenderGuid, receivedRequest.Data, sender);
}
catch(OutOfMemoryException)
{
DialogBoxes.ShowMessageBox("File too big to fit in memory");
}
catch(FileTransferException error)
{
DialogBoxes.ShowMessageBox(error.Message);
}
catch(Exception error)
{
DialogBoxes.ShowMessageBox("Unknown error " + error.Message);
}
finally
{
progressStop();
sender.Send(Strings.RESPONSE_REJECT);
}
});
}
private static async void deviceDiscovered(TCPSocket sender)
{
try
{
string ip = sender.GetIP();
string receivedString = await sender.Recv();
if (receivedString.IndexOf(":") == -1 || receivedString.IndexOf(":") == receivedString.Length-1) return;
string guid = receivedString.Substring(0, receivedString.IndexOf(":"));
if (guid == (await GuidHandling.GetMyGuid())) return;
string name = receivedString.Substring(receivedString.IndexOf(":") + 1);
DeviceDiscovered(ip, guid, name);
}
catch(Exception)
{
}
}
private async static Task pairRequestReceived(string peer, string data, TCPSocket socket)
{
progressIndeterminate();
var request = JSONHandling.ParseJSONResponse<PairingRequest>(data);
if(request.Guid!=peer)
{
progressStop();
await socket.Send(Strings.RESPONSE_REJECT);
return;
}
string signatureSecret = await DialogBoxes.AskForInput("Pairing request", "Please enter the shared password");
if (signatureSecret == null)
{
progressStop();
await socket.Send(Strings.RESPONSE_REJECT);
return;
}
if(!request.PublicKey.VerifySignature(signatureSecret))
{
progressStop();
await socket.Send(Strings.RESPONSE_BAD_SIGNATURE);
await DialogBoxes.ShowMessageBox("Shared password incorrect");
return;
}
string myPrivateKey = DiffieHellman.generate_DH_Private();
string myPublicKey = DiffieHellman.calculate_DH_Public(myPrivateKey);
PublicKey returnedKey = new PublicKey(myPublicKey, signatureSecret);
await sendRequestToSocket(socket, Strings.REQYEST_TYPE_PUBLICKEY, JSONHandling.SerializeObject(returnedKey));
string response = await socket.Recv();
progressStop();
if(response!=Strings.RESPONSE_OK)
{
await DialogBoxes.ShowMessageBox(response);
return;
}
Peer newPeer = new Peer(request.Guid, request.Name);
newPeer.LastKnownIP = socket.GetIP();
newPeer.MyPrivateKey = myPrivateKey;
newPeer.PublicKey = request.PublicKey.Key;
newPeer.SharedPassword = signatureSecret;
addPeer(newPeer);
await StorePeers();
RefreshPeerMap();
}
