private void RegisterButton_Click(object sender, RoutedEventArgs e)
{
RegisterOutput ro = GetSelectedValuesFromGUIRegister();
bool correctInput = ro.IsInputCorrect;
if (correctInput)
{
User newUser = UsersManagement.AddUser(ro.Email, ro.Password);
users.Add(newUser);
//refresh all listboxes to show also newly added user
RecipentsListBox.ItemsSource = null;
RecipentsListBoxDecryption.ItemsSource = null;
RecipentsListViewRegister.ItemsSource = null;
RecipentsListBox.ItemsSource = users;
RecipentsListBoxDecryption.ItemsSource = users;
RecipentsListViewRegister.ItemsSource = users;
resultTextBlockRegister.Text = "Zostałeś zarejestrowany, dziękujemy!";
}
else
{
MessageBoxResult result =
MessageBox.Show(ro.ErrorMessage,
"Błędne dane wejściowe", MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
}
private void PrepareAppUsers()
{
users = UsersManagement.GetUsersListFromFile();
//set listbox to display all users (as potential recipents of encrypted data)
RecipentsListBox.ItemsSource = users;
RecipentsListBoxDecryption.ItemsSource = users;
RecipentsListViewRegister.ItemsSource = users;
}
public static RegisterOutput ParseRegisterValues(RegisterInput ri)
{
bool readingAllOK = true;
string errorMsg = "";
//retrieve email and password
string email = ri.Email;
if (string.IsNullOrEmpty(email))
{
readingAllOK = false;
errorMsg += "Błędny email.\n";
}
else
{
try
{
var addr = new System.Net.Mail.MailAddress(email);
readingAllOK = (addr.Address == email);
}
catch
{
readingAllOK = false;
errorMsg += "Błędny email.\n";
}
}
string password = ri.Password;
if (!UsersManagement.PasswordCorrect(password))
{
readingAllOK = false;
errorMsg += "Błędne hasło. \n" +
"Ograniczenia hasła: Minimalna długość osiem znaków; \n" +
"co najmniej: jedna cyfra, jedna litera, jeden znak specjalny\n";
}
RegisterOutput ro = new RegisterOutput(readingAllOK,
email, password, errorMsg);
return(ro);
}
private byte[] ManageRecipent(string obtainedPassword)
{
//recipents are kept in a dictionary as
//<recipentEmail, encryptedUserSessionKey> pairs
//to decrypt the file we need a session key
//we need to find selectedUser- the user that current user of the app claims to be-
//get their encryptedUserSessionKey
//and decrypt the key using user's private key
//todo maybe set to some noise, so that if foreach doesn't find anything, the decoding will work and produce noise-file
string encryptedSessionKeyString = "err";
bool userIsAuthorizedToDecrypt = false;
foreach (KeyValuePair <string, string> emailKey in RecipentsEmailSessionKey)
{
if (emailKey.Key.Equals(DecryptionOutput.Recipent.Email))
{
encryptedSessionKeyString = emailKey.Value;
userIsAuthorizedToDecrypt = true;
break;
}
}
//if selected user is not on recipents list- they have no right to decrypt file
//so generate random session key
if (!userIsAuthorizedToDecrypt)
{
Console.WriteLine("user can't decode that file! generating random session key");
return(null);
}
//decrypt session key using user's private key
string userPrivateKeyString =
UsersManagement.GetUserPrivateKey(DecryptionOutput.Recipent.Email, obtainedPassword);
byte[] decryptedSessionKeyBytes =
EncryptionHelper.DecryptSessionKeyFromString(encryptedSessionKeyString, userPrivateKeyString);
return(decryptedSessionKeyBytes);
}
