void Receive()
{
try
{
while (true)
{
byte[] data = new byte[1024 * 5000];
clientSocket.Receive(data);
string message = (string)Deserialize(data);
string MsgType = message.Split('|')[2];
if (MsgType == "ClientData")
{
string sendPoint = message.Split('|')[0];
bool checkClientExist = false;
foreach (Client client in listClient)
{
if (client.EndPoint == sendPoint)
{
checkClientExist = true;
break;
}
}
if (checkClientExist == false)
{
Client client = new Client(message.Split('|')[0], message.Split('|')[3]);
listClient.Add(client);
AddClientToPnlListClient(client);
AddClientToPnlMsg(client);
}
if (SelectedClient == null)
{
SelectedClient = listClient[0];
labelSelectedClient.Text = SelectedClient.Name + " - " + SelectedClient.EndPoint;
foreach (Control control in pnlListClients.Controls)
{
if (control.Name == SelectedClient.EndPoint)
{
control.BackColor = Color.FromArgb(180, 180, 180);
}
}
}
}
else if (MsgType == "Image")
{
Client client = GetClientData(message.Split('|')[0]);
Image image = DecryptImage(message.Split('|')[3]);
if (image != null)
{
DisplayImage(image, "receive", client);
client.NewMsg = true;
foreach (Panel panel in pnlListClients.Controls)
{
if (panel.Name == client.EndPoint)
{
if (this.InvokeRequired)
{
this.BeginInvoke((MethodInvoker) delegate()
{
panel.BackColor = Color.Red;
});
}
else
{
panel.BackColor = Color.Red;
}
}
}
}
}
else if (MsgType.Contains("Text") == true)
{
//string cypher_sign = message.Split('~')[1];
string cypher = message.Split('|')[3];
string sign = message.Split('|')[4];
string msgIndex = MsgType.Remove(0, 4);
string msg = RSA_Crypto.Decrypt(Convert.FromBase64String(cypher));
Client client = GetClientData(message.Split('|')[0]);
string publicKey = client.PublicKey;
byte[] signature = Convert.FromBase64String(sign);
MD5 md5 = MD5.Create();
string hashedMsg = Convert.ToBase64String(md5.ComputeHash(Encoding.UTF8.GetBytes(msg)));
if (RSA_Crypto.VerifyData(publicKey, msg, signature) == true)
{
DisplayText(msg, "receive", msgIndex, client);
SendEcho(client, hashedMsg, msgIndex);
}
if (WindowState != FormWindowState.Minimized && SelectedClient == client)
{
Thread.Sleep(10);
SendEcho(client, hashedMsg, msgIndex);
}
else
{
Message unreadMsg = new Message(Convert.ToInt32(msgIndex), hashedMsg, 1);
client.UnreadMessages.Add(unreadMsg);
client.NewMsg = true;
foreach (Panel panel in pnlListClients.Controls)
{
if (panel.Name == client.EndPoint)
{
if (this.InvokeRequired)
{
this.BeginInvoke((MethodInvoker) delegate()
{
panel.BackColor = Color.Red;
});
}
else
{
panel.BackColor = Color.Red;
}
}
}
}
}
else if (MsgType.Contains("Echo") == true)
{
string cypher = message.Split('|')[3];
string sign = message.Split('|')[4];
string msgIndex = MsgType.Remove(0, 4);
string msg = RSA_Crypto.Decrypt(Convert.FromBase64String(cypher));
Client client = GetClientData(message.Split('|')[0]);
string publicKey = client.PublicKey;
byte[] signature = Convert.FromBase64String(sign);
if (RSA_Crypto.VerifyData(publicKey, msg, signature) == true)
{
int state = client.ChangeMsgState(msgIndex, msg);
ChangeMsgState(msgIndex, state, client);
}
}
}
}
catch (Exception e)
{
Close();
}
}
