private async void extractButton_Click(object sender, RoutedEventArgs e)
{
if (stego == null)
{
await this.ShowMessageAsync("Error", "Image is not selected. Please choose an image first.", MessageDialogStyle.Affirmative);
//MessageBox.Show("Image is not selected. Please choose an image first.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
if (radioLSB.IsChecked == true)
{
text = LSB.ExtractText(stego);
}
else if (radioFibo.IsChecked == true)
{
text = Fibonacci.ExtractText(stego);
}
else if (radioEdge.IsChecked == true)
{
text = Canny.ExtractText(stego);
}
if (encrypt.IsChecked == true)
{
if (keyBox.Text != string.Empty)
{
try
{
//richTextBox.Text = AES.StringCipher.Decrypt(text, keyBox.Text);
//var tmp = Encoding.UTF8.GetBytes(text.Substring(0, text.Length - 1));
//var base64 = Convert.ToBase64String(tmp);
richTextBox.Text = AES.StringCipher.Decrypt(text.Substring(0, text.Length - 1), keyBox.Text);
}
catch (FormatException ferr)
{
await this.ShowMessageAsync("Error", "Error Occured. " + ferr.Message, MessageDialogStyle.Affirmative);
// MessageBox.Show("Error Occured. " + ferr.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
catch (Exception err)
{
await this.ShowMessageAsync("Error", "Error Occured. Please check key.", MessageDialogStyle.Affirmative);
//MessageBox.Show("Error Occured. Please check key." + err.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
else
{
await this.ShowMessageAsync("Error", "Provide cryptography key.", MessageDialogStyle.Affirmative);
// MessageBox.Show("Provide cryptography key.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
else
{
richTextBox.Text = text.Substring(0, text.Length - 1);
}
// richTextBox.Document.Blocks.Clear();
//richTextBox.Document.Blocks.Add(new Paragraph(new Run(text)));
// MessageBox.Show("Successfully Generated. Now you can save.");
}