public static void dh(NetworkStream s, StreamReader r, StreamWriter w)
{
try
{
// Diffie hellman key exchange on GF(P)
// genererate
byte[] rand = positive(Convert.FromBase64String(getSalt(128)));
BigInteger a = new BigInteger(rand);
// send g**secret to the server
BigInteger g_a = BigInteger.ModPow(G, a, P);
byte[] g_a_byte = g_a.ToByteArray().Reverse().ToArray();
w.WriteLine(base64_encode(g_a_byte));
w.Flush();
BigInteger g_b = new BigInteger(positive(Convert.FromBase64String(r.ReadLine()).Reverse().ToArray()));
// read g_b and compute g_b_a
// compute g_b_a
byte[] secret = BigInteger.ModPow(g_b, a, P).ToByteArray().Reverse().ToArray();
if (secret.Length != 128)
{
byte[] temp = new byte[128];
Array.Copy(secret, 1, temp, 0, 128);
Array.Copy(temp, secret, 128);
}
SHA256Managed sha = new SHA256Managed();
dh_secret = sha.ComputeHash(secret, 0, 128);
}
catch (Exception)
{
// DH error
OtherThread.disconnect();
}
// DONE DIFFIE HELLMAN
}
// Saves the data in user object and close it
public void LogOut()
{
OtherThread.stop();
if (this.user == null)
{
return;
}
this.SaveUserProfile();
this.user = null;
this.MonthData = null;
this.Contactes = null;
MainWindow.settingsField = null;
MainWindow.ContactesField = null;
userPasswrd = "";
}
// Authenticates a user and sets its profile data to user object
// Returns : null if the username doesn't exist, false if the password is not correct or true if the authenticathion succeeds
public bool?LogIn(String username, String password)
{
if (this.user != null)
{
this.LogOut();
}
bool?authenRes = this.usersLst.AuthenticateUser(username, password);
if (authenRes != true)
{
return(authenRes);
}
userPasswrd = password;
this.currentUserDataPath = Environment.CurrentDirectory + @"\Data\" + username;
this.LoadUserProfile(username);
this.LoadMonthData(DateTime.Now.Year, DateTime.Now.Month);
this.LoadContactes();
MainWindow.mw.LoadActivities();
OtherThread.start();
return(true);
}
public void AddEvenement(Evenement e)
{
if (this.user == null)
{
throw new Exception("User account is not loaded");
}
if (e.DateDebut.Month == this.MonthData.Month.Month && e.DateDebut.Year == this.MonthData.Month.Year)
{
this.MonthData.AddEvenement(new DateTime(e.DateDebut.Year, e.DateDebut.Month, e.DateDebut.Day), e);
MainWindow.CalendarField.UpdateCalendar();
MainWindow.TachesEventsField.Update();
}
else
{
CalendarInfo ci = new CalendarInfo(this.currentUserDataPath + $"\\MonthData{e.DateDebut.Month}-{e.DateDebut.Year}.json", new DateTime(e.DateDebut.Year, e.DateDebut.Month, 1));
ci.AddEvenement(new DateTime(e.DateDebut.Year, e.DateDebut.Month, e.DateDebut.Day), e);
ci.StoreData();
}
foreach (Notif n in e.Alarms)
{
OtherThread.sendData(ConvertToNotification(n, "evenment", e.DateDebut, e.Title));
}
}
public void AddTache(Tache t)
{
if (this.user == null)
{
throw new Exception("User account is not loaded");
}
if (t.dateDebut.Month == this.MonthData.Month.Month && t.dateDebut.Year == this.MonthData.Month.Year)
{
this.MonthData.AddTache(new DateTime(t.dateDebut.Year, t.dateDebut.Month, t.dateDebut.Day), t);
MainWindow.CalendarField.UpdateCalendar();
MainWindow.TachesEventsField.Update();
}
else
{
CalendarInfo ci = new CalendarInfo(this.currentUserDataPath + $"\\MonthData{t.dateDebut.Month}-{t.dateDebut.Year}.json", new DateTime(t.dateDebut.Year, t.dateDebut.Month, 1));
ci.AddTache(new DateTime(t.dateDebut.Year, t.dateDebut.Month, t.dateDebut.Day), t);
ci.StoreData();
}
foreach (Notif n in t.Alarms)
{
OtherThread.sendData(ConvertToNotification(n, "tache", t.dateDebut, t.title));
}
}
public void exit(object o, ExitEventArgs e)
{
OtherThread.stop();
}
