private void buttonDecode_Click(object sender, RoutedEventArgs e)
{
if (checkBoxEncrypted.IsChecked == true)
{
try
{
textBoxText.Text = AESUtility.DecryptStringAES(SteganographyUtility.extractText(_image), passwordBox.Password);
}
catch (Exception)
{
MessageBox.Show("Wrong password!", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
else
{
textBoxText.Text = SteganographyUtility.extractText(_image);
}
}
private void buttonEncode_Click(object sender, RoutedEventArgs e)
{
//Check if text fits in image and if not empty
if (textBoxText.Text.Length == 0)
{
MessageBox.Show("The text you want to hide can't be empty", "Error", MessageBoxButton.OK,
MessageBoxImage.Error);
}
else if (textBoxText.Text.Length > _image.Height * _image.Width * 0.375)
{
MessageBox.Show("This text is too long (" + textBoxText.Text.Length + " characters) for the image.\n" +
"The maximum number of characters you can use: " + Math.Floor(_image.Height * _image.Width * 0.375), "Error", MessageBoxButton.OK,
MessageBoxImage.Error);
}
else
{
if (checkBoxEncrypted.IsChecked == true)
{
if (passwordBox.Password.Length < 6)
{
MessageBox.Show("Password must have at least 6 characters.", "Error", MessageBoxButton.OK,
MessageBoxImage.Error);
}
else
{
_image =
SteganographyUtility.embedText(
AESUtility.EncryptStringAES(textBoxText.Text, passwordBox.Password),
_image);
textBoxText.Text = "";
}
}
else
{
_image =
SteganographyUtility.embedText(
textBoxText.Text,
_image);
textBoxText.Text = "";
}
}
}
