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);
}
public KdcFtpKey getKdcFtpKey(string name)
{
try
{
KdcFtpKey exsistUser = kdcFtpdbContext.KdcFtpKeys.Single(user => user.Name == name);
Console.WriteLine("user with name " + name + " is exsists");
return(exsistUser);
}
catch
{
Console.WriteLine("user with name " + name + " not exsists");
return(null);
}
}
public static Dictionary <string, UserFtpServiceData> users_list = new Dictionary <string, UserFtpServiceData>(); // user, key_S
public void requstForConnectionWithSessionKey(FtpTicketRequst ftpTicketRequst)
{
IClientFtpCallBack iClientFtpCallBack = OperationContext.Current.GetCallbackChannel <IClientFtpCallBack>();
KdcFtpKey retKeyFromDB = m_FtpDBservice.getKdcFtpKey("KDC");
if (retKeyFromDB == null)
{
iClientFtpCallBack.finishRequstConnectionProcess(null);
return;
}
byte[] sessionKey = CAes.SimpleDecryptWithPassword(ftpTicketRequst.SessionKeyClientFTPEncryptedForFTP, retKeyFromDB.PassWord);
string usenameDecryptedWithFtpKdcKey = CAes.SimpleDecryptWithPassword(ftpTicketRequst.UserNameencryptedForFtpWithFtpKey, retKeyFromDB.PassWord);
string usenameDecryptedWithSessionKey = CAes.SimpleDecrypt(ftpTicketRequst.UserNameencryptedForFtpWithSessionKey, sessionKey, sessionKey);
if (usenameDecryptedWithFtpKdcKey == usenameDecryptedWithSessionKey) // OK
{
UserFtpServiceData userData = new UserFtpServiceData(sessionKey, iClientFtpCallBack);
users_list.Add(usenameDecryptedWithFtpKdcKey, userData);
string fileNameResult;
string[] filesPaths = Directory.GetFiles("..\\..\\files\\",
"*.*", SearchOption.AllDirectories);
List <string> newFilesNames = new List <string>();
// Display all the files.
foreach (string path in filesPaths)
{
fileNameResult = Path.GetFileName(path);
string fileNameResultString = CAes.SimpleEncrypt(fileNameResult, sessionKey, sessionKey);
newFilesNames.Add(fileNameResultString);
}
iClientFtpCallBack.finishRequstConnectionProcess(newFilesNames);
return;
}
iClientFtpCallBack.finishRequstConnectionProcess(null);
}
