private void decode_button_click(object sender, EventArgs e)
{
//string src = d_src_tb.Text;
//string dst = d_dst_tb.Text;
String password = d_password_tb.Text;
String private_key;
if (d_users_list.SelectedItem != null && d_src_tb.Text != "Wybierz plik" && d_dst_tb.Text != "Wybierz plik")
{
String selected_user = d_users_list.SelectedItem.ToString();
IAlgorithm alg = decryptKey(private_keys_path.ToString() + selected_user, password);
Int64 length = alg.getSrcLength();
Int64 step = System.Convert.ToInt64(Math.Ceiling(length / (double)100));
Int64 bytes = 1;
d_status_lbl.Text = "Trwa przetwarzanie klucza prywatnego";
while (bytes > 0)
{
// "unit work" szyfrowanie fragmentu pliku
bytes = alg.encrypt(step);
}
alg.Dispose();
d_status_lbl.Text = "Zaczeto odszyfrowanie";
//szyfrowanie######################################## do oddzielnej funkcji decode
private_key = get_private_key(selected_user);
alg = decryptFile(d_src_tb.Text, d_dst_tb.Text, password, private_key, selected_user);
length = alg.getSrcLength();
step = System.Convert.ToInt64(Math.Ceiling(length / (double)100));
bytes = 1;
while (bytes > 0)
{
// "unit work" szyfrowanie fragmentu pliku
bytes = alg.encrypt(step);
}
alg.Dispose();
MessageBox.Show("Odszyfrowanie zakonczone sukcesem!");
d_status_lbl.Text = "Odszyfrowanie zakonczone";
}
else
{
MessageBox.Show("Zaznacz plik lub wybierz uzytkownika!");
}
}
//TODO Zaszyfrowac klucz publiczny i prywatny za pomoca hasla!!!
private void create_user(String name, String password)
{
String key_length_str = key_length_cb.Text;
int key_length = Int32.Parse(key_length_str.Substring(0, key_length_str.IndexOf(" ")));
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(key_length);
var private_key = rsa.ToXmlString(true);
var public_key = rsa.ToXmlString(false); // RSA.FromXmlString(publicKey);
var SHA = SHA256.Create();
byte[] hashed_password = SHA.ComputeHash(GetBytes(password));
KeyParameter session_key = new KeyParameter(hashed_password);
//szyfruje klucz prywatny za pomoca hasla, i skrotu funkcji SHA_256
using (StreamWriter sw = new StreamWriter(public_keys_path + name, true))
{
sw.Write(public_key);
sw.Flush();
sw.Close();
}
using (StreamWriter sw = new StreamWriter(private_keys_path + name + "tmp", true))
{
sw.Write(private_key);
sw.Flush();
sw.Close();
}
IAlgorithm alg = encryptFile(private_keys_path + name + "tmp", private_keys_path + name, "ECB", 128, 128, Convert.ToBase64String(hashed_password), session_key, hashed_password);
Int64 length = alg.getSrcLength();
Int64 step = System.Convert.ToInt64(Math.Ceiling(length / (double)100));
Int64 bytes = 1;
while (bytes > 0)
{
// "unit work" szyfrowanie fragmentu pliku
bytes = alg.encrypt(step);
}
alg.Dispose();
File.Delete(private_keys_path + name + "tmp");
}
private void encryptWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
//System.Console.WriteLine("encryptWorker_RunWorkerCompleted");
restoreDefaultControlsState();
if (!e.Cancelled)
{
IAlgorithm alg = e.Result as IAlgorithm;
bool encryption = alg.Encryption;
alg.Dispose();
var opStatus = (encryption ? "зашифровано" : "расшифрованно");
statusBarLabel.Text = opStatus;
}
else
{
statusBarLabel.Text = "прервано";
}
}