private void button1_Click(object sender, EventArgs e)
{
Random r = new Random();
ASCIIEncoding aSCII = new ASCIIEncoding();
IPEndPoint snd = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = snd;
byte[] buf;
button1.Enabled = false;
while (true)
{
buf = new byte[128];
int size = socket.ReceiveFrom(buf, ref Remote);
if (size > 0)
{
string[] str = aSCII.GetString(buf).Split(':');
nameA = str[0];
nameB = str[1];
Int32.TryParse(str[2], out Ra);
AtKey = (nameA + "trent").GetHashCode() & 0x7FFFFFFF;
BtKey = (nameB + "trent").GetHashCode() & 0x7FFFFFFF;
string s = sesKey.ToString() + ':' + nameA;
byte[] crS = crypt(s, BtKey);
byte[] crS2 = crypt(Ra.ToString() + ':' + nameB + ':' + sesKey.ToString() + ':', AtKey);
byte[] crS3 = crypt(crS, AtKey);
byte[] newArray = new byte[crS2.Length + crS3.Length];
crS2.CopyTo(newArray, 0);
crS3.CopyTo(newArray, crS2.Length);
socket.SendTo(newArray, Remote);
button1.Enabled = true;
return;
}
}
}
private void ans_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Up)
{
Ra.Focus();
}
}
/* public void FirstCallBack(IAsyncResult aRes)
* {
* try
* {
*
* int size = socket.EndReceiveFrom(aRes, ref remotePoint);
* byte[] buf = new byte[50];
* if (size > 0)
* {
* byte[] recData = new byte[64];
* recData = (byte[])aRes.AsyncState;
*
* ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
* string msg = aSCIIEncoding.GetString(recData);
* if (initK)
* {
* if (initX)
* {
* if (initNG)
* {
* string[] ng = msg.Split(new char[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
* n = Convert.ToInt64(ng[0]);
* g = Convert.ToInt64(ng[1]);
* initNG = false;
* //msgList.Items.Add("Friend: " + msg);
* socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(FirstCallBack), buf);
* return;
* }
* if (x == 0)
* {
* Random r = new Random();
* x = r.Next(500000, 5000000);
* X = CryptoMath.PowerMod(g, x, n);
* ASCIIEncoding asc = new ASCIIEncoding();
* byte[] msgT = new byte[1500];
* msgT = asc.GetBytes(X.ToString());
* socket.Send(msgT);
* socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(FirstCallBack), buf);
*
* }
* string xf = aSCIIEncoding.GetString(recData);
* XF = Convert.ToInt64(xf);
* //msgList.Items.Add("Friend XF: " + xf);
* initX = false;
*
* }
* Ki = CryptoMath.PowerMod(XF, x, n);
* initK = false;
* socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(FirstCallBack), buf);
* return;
* }
* byte[] msgb = crypt(recData, Ki);
* msg = aSCIIEncoding.GetString(msgb);
* msgList.Items.Add("Friend: " + msg);
* }
*
* socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(FirstCallBack), buf);
*
*
* }
* catch (Exception e)
* {
* MessageBox.Show(e.ToString());
* }
* }*/
private void sendButton_Click(object sender, EventArgs e)
{
try
{
ASCIIEncoding asc = new ASCIIEncoding();
Random r = new Random();
Ra = r.Next(100000, 99999999);
byte[] buf = new byte[50];
if (firstMsg == "")
{
socket.Connect(trentPoint);
firstMsg = textBoxMessage.Text;
string msg = name + ':' + friendName + ':' + Ra.ToString();
//msgList.Items.Add("Отправили тренту");
takeRa = true;
takeBa = true;
socket.SendTo(asc.GetBytes(msg), trentPoint);
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref trentPoint, new AsyncCallback(KeyCallBack), buf);
textBoxMessage.Clear();
}
else
{
//byte[] msg = new byte[1500];
byte[] cMsg = crypt(textBoxMessage.Text, K);
//msg = asc.GetBytes(cMsg);
socket.SendTo(cMsg, remotePoint);
msgList.Items.Add("You: " + textBoxMessage.Text);
textBoxMessage.Clear();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void Confirm_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Enter)
{
Ra.Focus();
}
if (e.KeyCode == Keys.Up)
{
Password.Focus();
}
}
public void KeyCallBack(IAsyncResult aRes)
{
try
{
int size = socket.EndReceiveFrom(aRes, ref trentPoint);
Thread.Sleep(700);
socket.Connect(remotePoint);
byte[] buf = new byte[128];
Random r = new Random();
if (size > 0)
{
byte[] recData = new byte[128];
recData = (byte[])aRes.AsyncState;
ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
if (init)
{
if (firstMsg == "")
{
recData = recData.Skip(1).ToArray();
byte[] decrMsg = crypt(recData, Kt);
string dMsg = aSCIIEncoding.GetString(decrMsg);
string[] g = dMsg.Split(':');
K = Convert.ToInt32(g[0]);
Rb = r.Next(10000, 9999999);
byte[] crMsg = crypt(Rb.ToString(), K);
socket.SendTo(crMsg, remotePoint);
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(KeyCallBack), buf);
firstMsg = "1";
return;
}
if (takeRa)
{
byte[] decrMsg = crypt(recData, Kt);
int n = Array.LastIndexOf(decrMsg, (byte)58);
byte[] b = decrMsg.Take(n).ToArray();
byte[] b2 = decrMsg.Skip(n).ToArray();
string[] dMsg = aSCIIEncoding.GetString(b).Split(':');
takeRa = false;
if (Ra.ToString() != dMsg[0])
{
MessageBox.Show("Ra не совпадает!");
return;
}
else
{
K = Convert.ToInt32(dMsg[2]);
socket.SendTo(b2, remotePoint);
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(KeyCallBack), buf);
return;
}
}
if (takeBa)
{
//byte[] recData = new byte[128];
recData = (byte[])aRes.AsyncState;
//ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
byte[] decrMsg = crypt(recData, K);
byte[] b = new byte[decrMsg.Length];
for (int i = 0; i < decrMsg.Length; i++)
{
if (48 > decrMsg[i] || decrMsg[i] > 57)
{
Array.Copy(decrMsg, b, i);
break;
}
}
string s = aSCIIEncoding.GetString(b);
int Rb_1 = Convert.ToInt32(s) - 1;
socket.SendTo(crypt(Rb_1.ToString(), K), remotePoint);
msgList.Items.Add("Ключ установлен!");
decrMsg = crypt(firstMsg, K);
init = false;
socket.SendTo(decrMsg, remotePoint);
msgList.Items.Add("You: " + firstMsg);
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(KeyCallBack), buf);
}
else
{
byte[] decrMsg = crypt(recData, K);
byte[] b = new byte[decrMsg.Length];
takeBa = false;
for (int i = 0; i < decrMsg.Length; i++)
{
if (48 > decrMsg[i] || decrMsg[i] > 57)
{
Array.Copy(decrMsg, b, i);
break;
}
}
string s = aSCIIEncoding.GetString(b);
if (Rb != Convert.ToInt32(s) + 1)
{
MessageBox.Show("Rb не совпадает!");
return;
}
else
{
msgList.Items.Add("Ключ установлен!");
init = false;
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(KeyCallBack), buf);
return;
}
}
}
else
{
byte[] encA = crypt(recData, K);
string rA = aSCIIEncoding.GetString(encA);
if (rA.IndexOf('?') != -1)
{
rA = rA.Substring(0, rA.IndexOf('?'));
}
else if (rA.IndexOf('\t') != -1)
{
rA = rA.Substring(0, rA.IndexOf('\t'));
}
msgList.Items.Add(friendName + ": " + rA);
socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref remotePoint, new AsyncCallback(KeyCallBack), buf);
return;
}
}
//socket.BeginReceiveFrom(buf, 0, buf.Length, SocketFlags.None, ref trentPoint, new AsyncCallback(KeyCallBack), buf);
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
