public bool SetLoginStatus(CLogInStatus logginStatus)
{
bool retVal = false;
if (!users_list.ContainsKey(logginStatus.m_username))
{
return(retVal);
}
UserServiceData userData = users_list[logginStatus.m_username];
if (userData != null)
{
if (!logginStatus.m_logInFail)
{
string logginChalleng = CAes.SimpleDecrypt(logginStatus.m_challenge, userData.SessionKey, userData.SessionKey);
if (userData.logginChallenge == logginChalleng)
{
retVal = true;
sendNewUserToAllClients(logginStatus.m_username, 1000);
}
}
if (!retVal)
{
users_list.Remove(logginStatus.m_username);
}
}
return(retVal);
}
public CSessionKeyResponse GetSessionKeyForChatConnection(CSessionParams sessionParams)
{
// get users from the data base
User retUser1FromDB = m_DBservice.getUserByName(sessionParams.client1UserName);
User retUser2FromDB = m_DBservice.getUserByName(sessionParams.client2UserName);
UserServiceData localUser = users_list[sessionParams.client1UserName];
UserServiceData partnerUser = users_list[sessionParams.client2UserName];
// check validity
if (retUser1FromDB == null || retUser2FromDB == null || localUser == null || partnerUser == null)
{
if (retUser1FromDB == null)
{
Console.Write(sessionParams.client1UserName + "not exist in DB");
}
if (retUser2FromDB == null)
{
Console.Write(sessionParams.client2UserName + "not exist in DB");
}
if (localUser == null)
{
Console.Write(sessionParams.client1UserName + "not logged in");
}
if (partnerUser == null)
{
Console.Write(sessionParams.client2UserName + "not logged in");
}
return(null);
}
// genrate new session key
byte[] sessionKey = CAes.NewKey();
//encrypt Eka [ Ks || || Kb[Ks] ]
byte[] encryptedDataForClientB = CAes.SimpleEncrypt(sessionKey, partnerUser.SessionKey, partnerUser.SessionKey); //Kb[Ks]
byte[] keyA = CAes.SimpleEncrypt(sessionKey, localUser.SessionKey, localUser.SessionKey); //Ka[Ks]
byte[] keyAB = CAes.SimpleEncrypt(encryptedDataForClientB, localUser.SessionKey, localUser.SessionKey); //Ka[clientB data]
// set return value
CSessionKeyResponse retVal = new CSessionKeyResponse();
retVal.m_sessionKeyA = keyA;
retVal.m_sessionKeyB = keyAB;
users_list[sessionParams.client1UserName].clientKdcCallBack.startChatSession(retUser2FromDB.ID + 1100, retUser2FromDB.Name, true);
users_list[sessionParams.client2UserName].clientKdcCallBack.startChatSession(retUser1FromDB.ID + 1100, retUser1FromDB.Name, false);
return(retVal);
}
public CKdcToClientLogInData LogInApp(string userName)
{
if (users_list.ContainsKey(userName))
{
Console.WriteLine("you already logged");
return(null);
}
Console.WriteLine("LOGIN: NAME {0} ", userName);
CKdcToClientLogInData msgKdcToClientLoggin = new CKdcToClientLogInData();
User retUserFromDB = m_DBservice.getUserByName(userName);
if (retUserFromDB != null)
{
byte[] userSessionKey = CAes.NewKey();
string challenge = Path.GetRandomFileName();
int port = 1100 + retUserFromDB.ID;
byte[] localPortByte = BitConverter.GetBytes(port);
msgKdcToClientLoggin.m_username = CAes.SimpleEncryptWithPassword(userName, retUserFromDB.PassWord);
msgKdcToClientLoggin.m_kdcAsSessionKey = CAes.SimpleEncryptWithPassword(userSessionKey, retUserFromDB.PassWord);
msgKdcToClientLoggin.m_challenge = CAes.SimpleEncryptWithPassword(challenge, retUserFromDB.PassWord);
msgKdcToClientLoggin.m_localPort = CAes.SimpleEncryptWithPassword(localPortByte, retUserFromDB.PassWord);
UserServiceData userServiceData = new UserServiceData(userSessionKey, OperationContext.Current.GetCallbackChannel <IClientKdcCallBack>());
userServiceData.logginChallenge = challenge + challenge;
users_list.Add(userName, userServiceData);
}
else
{
msgKdcToClientLoggin = null;
}
return(msgKdcToClientLoggin);
}
