private void remoteHandshake()
{
byte[] readBuffer = new byte[1024];
bool sessionOk = false;
try
{
readBuffer = udpClient.Receive(ref ipPartnerEndPointRcv);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
byte[] sessionKey = null;
if (readBuffer != null)
{
sessionKey = CAes.SimpleDecrypt(readBuffer, m_myUseruser.m_kdcAsSessionKey, m_myUseruser.m_kdcAsSessionKey);
m_sessionKey = sessionKey;
string challenge = System.IO.Path.GetRandomFileName();
messageCreateChatRemoteToMaster sendMsgFromMaster = new messageCreateChatRemoteToMaster();;
sendMsgFromMaster.challenge = CAes.SimpleEncrypt(challenge, sessionKey, sessionKey);
sendMsgFromMaster.sessionKey = CAes.SimpleEncrypt(sessionKey, sessionKey, sessionKey);
m_binryFormatter.Serialize(m_memStreamer, sendMsgFromMaster);
byte[] buffer = m_memStreamer.ToArray();
udpClient.Send(buffer, buffer.Length, ipPartnerEndPointSend);
byte[] readBuffer2 = new byte[1024];
try
{
readBuffer2 = udpClient.Receive(ref ipPartnerEndPointRcv);
byte[] clientData = new byte[1024];
MemoryStream readSteam = new MemoryStream(readBuffer2);
messageCreateChatRemoteToMaster retMsgFromRemote = (messageCreateChatRemoteToMaster)m_binryFormatter.Deserialize(readSteam);
byte[] sessionKey2 = CAes.SimpleDecrypt(retMsgFromRemote.sessionKey, sessionKey, sessionKey);
string challenge2 = CAes.SimpleDecrypt(retMsgFromRemote.challenge, sessionKey, sessionKey);
if (StructuralComparisons.StructuralEqualityComparer.Equals(sessionKey2, sessionKey) && challenge2 == challenge + challenge)
{
sessionOk = true;
}
}
catch (Exception e)
{
//set session key
Console.WriteLine(e.ToString());
}
}
if (sessionOk)
{
MessageBoxResult messageBoxResult = System.Windows.MessageBox.Show("confirm chat with " + m_userPort.userName, "Confirmation", System.Windows.MessageBoxButton.YesNo);
if (messageBoxResult == MessageBoxResult.Yes)
{
string confirmStr = "confirm";
byte[] confirmStringBytes = Encoding.ASCII.GetBytes(confirmStr);
byte[] encryptedMsg = CAes.SimpleEncrypt(confirmStringBytes, m_sessionKey, m_sessionKey);
udpClient.Send(encryptedMsg, encryptedMsg.Length, ipPartnerEndPointSend);
var evt = setShowChatWindowEvnt;
if (evt != null)
{
evt(this, "");
}
readChatMsg();
}
else
{
return;
}
}
}
private void masterHandshake()
{
while (m_sessionRespons == null)
{
Thread.Sleep(100);
}
m_sessionKey = CAes.SimpleDecrypt(m_sessionRespons.m_sessionKeyA, m_myUseruser.m_kdcAsSessionKey, m_myUseruser.m_kdcAsSessionKey);
m_remoteKey = CAes.SimpleDecrypt(m_sessionRespons.m_sessionKeyB, m_myUseruser.m_kdcAsSessionKey, m_myUseruser.m_kdcAsSessionKey);
bool sessionOk = false;
try
{
udpClient.Send(m_remoteKey, m_remoteKey.Length, ipPartnerEndPointSend);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
byte[] readBuffer = null;
try
{
readBuffer = udpClient.Receive(ref ipPartnerEndPointRcv);
byte[] clientData = new byte[1024];
MemoryStream readSteam = new MemoryStream(readBuffer);
messageCreateChatRemoteToMaster retMsgFromMaster = (messageCreateChatRemoteToMaster)m_binryFormatter.Deserialize(readSteam);
byte[] sessionKey = CAes.SimpleDecrypt(retMsgFromMaster.sessionKey, m_sessionKey, m_sessionKey);
if (StructuralComparisons.StructuralEqualityComparer.Equals(sessionKey, m_sessionKey))
{
string challenge = CAes.SimpleDecrypt(retMsgFromMaster.challenge, m_sessionKey, m_sessionKey);
string retChallengeEncryted = CAes.SimpleEncrypt(challenge + challenge, m_sessionKey, m_sessionKey);
byte[] encryptedSession = CAes.SimpleEncrypt(m_sessionKey, m_sessionKey, m_sessionKey);
messageCreateChatRemoteToMaster retMsgToMaster = new messageCreateChatRemoteToMaster();
retMsgToMaster.challenge = retChallengeEncryted;
retMsgToMaster.sessionKey = encryptedSession;
m_binryFormatter.Serialize(m_memStreamer, retMsgToMaster);
byte[] buffer = m_memStreamer.ToArray();
udpClient.Send(buffer, buffer.Length, ipPartnerEndPointSend);
sessionOk = true;
}
else
{
//error
return;
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
if (sessionOk)
{
byte[] readBufferConfirm = new byte[1024];
readBufferConfirm = udpClient.Receive(ref ipPartnerEndPointRcv);
byte[] readBufferConfirmBytes = CAes.SimpleDecrypt(readBufferConfirm, m_sessionKey, m_sessionKey);
string retStringConfirm = Encoding.ASCII.GetString(readBufferConfirmBytes);
if (retStringConfirm == "confirm")
{
var evt = setShowChatWindowEvnt;
if (evt != null)
{
evt(this, "");
}
readChatMsg();
}
else
{
;
}
{
return;
}
}
}
