public void startSessionChatRemote()
{
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)
{
clientPrivateData userData = ClientAllData.Instance.getMyClient();
sessionKey = CAes.SimpleDecrypt(readBuffer, userData.m_kdcAsSessionKey, userData.m_kdcAsSessionKey);
string challenge = 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)
{
sessionOk = true;
}
}
catch (Exception e)
{
//set session key
Console.WriteLine(e.ToString());
}
}
if (sessionOk)
{
m_sessionKey = sessionKey;
}
}
public void startChatSessionMaster()
{
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, 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)
{
}
}
