private void decryptButton_Click(object sender, EventArgs e)
{
try
{
AudioEncoder decoder = new AudioEncoder();
if (string.IsNullOrEmpty(encryptedAudioPathTextBox.Text))
{
throw new Exception("Encrypted audio file was not selected");
}
decoder.WavToBytes(encryptedAudioPathTextBox.Text);
byte[] message = decoder.RemoveMessage();
if (string.IsNullOrEmpty(encryptionKeyTextBox.Text))
{
throw new Exception("Generation key was not provided");
}
string key_text = encryptionKeyTextBox.Text.Trim();
if (key_text.Length != 32)
{
throw new Exception("Invalid generation key provided");
}
var key = new byte[16];
for (int i = 0; i < 32; i += 2)
{
key[i / 2] = Convert.ToByte(key_text.Substring(i, 2), 16);
}
string result = decoder.DecryptMessage(message, key);
recoveredMessageTextBox.Text = result;
}
catch (Exception ex)
{
//write message to status bar
}
}
private void EncryptAndEncode(string encodedFilePath)
{
try
{
var random = new RNGCryptoServiceProvider();
var key = new byte[16];
random.GetBytes(key);
string key_text = string.Empty;
foreach (byte b in key)
{
key_text += string.Format("{0:x2}", b);
}
generatedKeyTextBox.Text = key_text;
AudioEncoder encoder = new AudioEncoder();
if (string.IsNullOrEmpty(loadedFilePathTextBox.Text))
{
throw new Exception("Base file was not selected");
}
encoder.WavToBytes(loadedFilePathTextBox.Text);
if (string.IsNullOrEmpty(plaintextTextBox.Text))
{
throw new Exception("Message was not provided");
}
byte[] encrypted = encoder.EncryptMessage(plaintextTextBox.Text, key);
encoder.AddMessage(encrypted);
encoder.BytesToWav(encodedFilePath);
}
catch (Exception ex)
{
//write message to status bar or whatever
}
}