public FtpTicketResponse RequstSessionKeyForFtpConnection(FtpKeyRequst ftpKeyRequst)
{
if (!users_list.ContainsKey(ftpKeyRequst.UserName))
{
return(null);
}
// get users from the data base
KdcFtpKey retKeyFromDB = m_FtpDBservice.getKdcFtpKey("KDC");
// check validity
if (retKeyFromDB == null)
{
Console.Write("no key exist in DB");
return(null);
}
// genrate new session key for CLIENT - FTP
byte[] sessiomKey = CAes.NewKey();
FtpTicketResponse ftpTicketResponse = new FtpTicketResponse();
ftpTicketResponse.SessionKeyClientFTPEncryptedForFTP = CAes.SimpleEncryptWithPassword(sessiomKey, retKeyFromDB.PassWord);
ftpTicketResponse.UserNameencryptedForFtpWithFtpKey = CAes.SimpleEncryptWithPassword(ftpKeyRequst.UserName, retKeyFromDB.PassWord);
ftpTicketResponse.SessionKeyClientFTPEncryptedForClient = CAes.SimpleEncrypt(sessiomKey, users_list[ftpKeyRequst.UserName].SessionKey, users_list[ftpKeyRequst.UserName].SessionKey);
return(ftpTicketResponse);
}
// requst to connect to Ftp service
private void getSessionKeyForFtpWorker_DoWork(object sender, DoWorkEventArgs e)
{
clientPrivateData clientData = ClientAllData.Instance.getMyClient();
//send requst for Auth
FtpKeyRequst ftpKeyRequst = new FtpKeyRequst(clientData.username);
FtpTicketResponse ftpTicketResponse = kdcProxy.RequstSessionKeyForFtpConnection(ftpKeyRequst); // blocking
if (ftpTicketResponse == null)
{
return;
}
byte[] sessionKey = CAes.SimpleDecrypt(ftpTicketResponse.SessionKeyClientFTPEncryptedForClient, clientData.m_kdcAsSessionKey, clientData.m_kdcAsSessionKey);
ClientAllData.Instance.getMyClient().m_ftpSessionKey = sessionKey;
FtpTicketRequst ftpTicketRequst = new FtpTicketRequst();
ftpTicketRequst.UserNameencryptedForFtpWithFtpKey = ftpTicketResponse.UserNameencryptedForFtpWithFtpKey;
ftpTicketRequst.SessionKeyClientFTPEncryptedForFTP = ftpTicketResponse.SessionKeyClientFTPEncryptedForFTP;
ftpTicketRequst.UserNameencryptedForFtpWithSessionKey = CAes.SimpleEncrypt(clientData.username, sessionKey, sessionKey);
ftpProxy.requstForConnectionWithSessionKey(ftpTicketRequst); // non blocking
//TODO: should set timer for time out
}