private void ShakeHand()
{
if (PUB.ActiveC)
{
PUB.s_ctrl.Send(Encoding.UTF8.GetBytes(pubkey));
counter = PUB.s_ctrl.Receive(bytesReceived, bytesReceived.Length, 0);
pubkey4send = Encoding.UTF8.GetString(bytesReceived, 0, counter);
AES_module.AES_Initialize(out PUB.AES_Key, out PUB.AES_IV);
byte[] AES_Complex = AES_join(PUB.AES_Key, PUB.AES_IV);
byte[] cipherkey = RSA_module.RSAEncrypt(AES_Complex, pubkey4send);
PUB.s_ctrl.Send(cipherkey);
}
else
{
counter = PUB.s_ctrl.Receive(bytesReceived, bytesReceived.Length, 0);
pubkey4send = Encoding.UTF8.GetString(bytesReceived, 0, counter);
PUB.s_ctrl.Send(Encoding.UTF8.GetBytes(pubkey));
counter = PUB.s_ctrl.Receive(bytesReceived, bytesReceived.Length, 0);
byte[] cipherkey = new byte[counter];
Array.Copy(bytesReceived, 0, cipherkey, 0, counter);
byte[] AES_Complex = RSA_module.RSADecrypt(cipherkey, privkey);
Buffer.BlockCopy(AES_Complex, 0, PUB.AES_Key, 0, 32);
Buffer.BlockCopy(AES_Complex, 32, PUB.AES_IV, 0, 16);
}
}
private void SendMSG_Button_Click(object sender, EventArgs e)
{
DateTime dt = DateTime.Now;
RecvBox.AppendText(dt.ToString() + " " + CFG.UserID + ":" + Environment.NewLine);
RecvBox.AppendText(TransBox.Text + Environment.NewLine);
byte[] sendcache = AES_module.AES_Encrypt(Encoding.UTF8.GetBytes(TransBox.Text), AES_Key, AES_IV);
PUB.s.Send(sendcache);
TransBox.Clear();
}
private void textbox_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyData == (Keys.Control | Keys.Enter))
{
DateTime dt = DateTime.Now;
RecvBox.AppendText(dt.ToString() + " " + CFG.UserID + ":" + Environment.NewLine);
RecvBox.AppendText(TransBox.Text + Environment.NewLine);
byte[] sendcache = AES_module.AES_Encrypt(Encoding.UTF8.GetBytes(TransBox.Text), PUB.AES_Key, PUB.AES_IV);
PUB.s_chat.Send(sendcache);
TransBox.Clear();
TransBox.Focus();
}
}
public void Recv()
{
Action <string> Show_Recv = new Action <string>(RecvboxFresh);
while (true)
{
tmp = PUB.s.Receive(bytesReceived, bytesReceived.Length, 0);
byte[] cipherbyte = new byte[tmp];
Array.Copy(bytesReceived, 0, cipherbyte, 0, tmp);
byte[] plainbytes = AES_module.AES_Decrypt(cipherbyte, AES_Key, AES_IV);
string plaintext = Encoding.UTF8.GetString(plainbytes);
Invoke(Show_Recv, plaintext);
}
}
private void Recv()
{
Action <string> Show_Recv = new Action <string>(RecvboxFresh);
try
{
while (true)
{
counter = PUB.s_chat.Receive(bytesReceived, bytesReceived.Length, 0);
byte[] cipherbyte = new byte[counter];
Array.Copy(bytesReceived, 0, cipherbyte, 0, counter);
byte[] plainbytes = AES_module.AES_Decrypt(cipherbyte, PUB.AES_Key, PUB.AES_IV);
string plaintext = Encoding.UTF8.GetString(plainbytes);
Invoke(Show_Recv, plaintext);
}
}
catch (SocketException e)
{
}
}
public Chat_Form()
{
InitializeComponent();
TargetID_Lable.Text = "正在与 " + CFG.TargetID + " 聊天：";
RSA_module.RSA_pair(out pubkey, out privkey);
if (PUB.ActiveC)
{
PUB.s.Send(Encoding.UTF8.GetBytes(pubkey));
tmp = PUB.s.Receive(bytesReceived, bytesReceived.Length, 0);
pubkey4send = Encoding.UTF8.GetString(bytesReceived, 0, tmp);
AES_module.AES_Initialize(out AES_Key, out AES_IV);
byte[] AES_Complex = AES_join(AES_Key, AES_IV);
byte[] cipherkey = RSA_module.RSAEncrypt(AES_Complex, pubkey4send);
PUB.s.Send(cipherkey);
}
else
{
tmp = PUB.s.Receive(bytesReceived, bytesReceived.Length, 0);
pubkey4send = Encoding.UTF8.GetString(bytesReceived, 0, tmp);
PUB.s.Send(Encoding.UTF8.GetBytes(pubkey));
tmp = PUB.s.Receive(bytesReceived, bytesReceived.Length, 0);
byte[] cipherkey = new byte[tmp];
Array.Copy(bytesReceived, 0, cipherkey, 0, tmp);
byte[] AES_Complex = RSA_module.RSADecrypt(cipherkey, privkey);
Buffer.BlockCopy(AES_Complex, 0, AES_Key, 0, 32);
Buffer.BlockCopy(AES_Complex, 32, AES_IV, 0, 16);
}
Thread Rx = new Thread(new ThreadStart(Recv));
Rx.Start();
SendMSG_Button.Enabled = true;
}
