private void btnExtract_Click(object sender, System.EventArgs e)
{
//extract the message from the carrier wave
if (txtSrcFile.Text.Length == 0)
{
errorProvider.SetError(txtSrcFile, "You forgot to choose a carrier file.");
}
else if (txtKeyFile.Text.Length == 0)
{
errorProvider.SetError(txtKeyFile, "You forgot to choose a key file.");
}
else
{
this.Cursor = Cursors.WaitCursor;
FileStream sourceStream = null;
WaveStream audioStream = null;
//create an empty stream to receive the extracted message
MemoryStream messageStream = new MemoryStream();
//open the key file
Stream keyStream = new FileStream(txtKeyFile.Text, FileMode.Open);
try {
//open the carrier file
sourceStream = new FileStream(txtSrcFile.Text, FileMode.Open);
audioStream = new WaveStream(sourceStream);
WaveUtility utility = new WaveUtility(audioStream);
//exctract the message from the carrier wave
utility.Extract(messageStream, keyStream);
messageStream.Seek(0, SeekOrigin.Begin);
if (rdoMessageDstFile.Checked) //save result to a file
{
FileStream fs = new FileStream(txtMessageDstFile.Text, FileMode.Create);
byte[] buffer = new byte[messageStream.Length];
messageStream.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, buffer.Length);
fs.Close();
}
else //display result
{
txtExtractedMessage.Text = new StreamReader(messageStream).ReadToEnd();
}
}
catch (Exception ex) {
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally{
if (keyStream != null)
{
keyStream.Close();
}
if (messageStream != null)
{
messageStream.Close();
}
if (audioStream != null)
{
audioStream.Close();
}
if (sourceStream != null)
{
sourceStream.Close();
}
this.Cursor = Cursors.Default;
}
}
}
private void btnHide_Click(object sender, System.EventArgs e)
{
//hide the message inside the carrier wave
if (rdoSrcFile.Checked && (txtSrcFile.Text.Length == 0))
{
errorProvider.SetError(txtSrcFile, "You forgot to choose a carrier file.");
}
else if (txtKeyFile.Text.Length == 0)
{
errorProvider.SetError(txtKeyFile, "You forgot to choose a key file.");
}
else if (txtDstFile.Text.Length == 0)
{
errorProvider.SetError(txtDstFile, "The resulting carrier file must be saved somewhere.");
}
else if (rdoMsgFile.Checked && (txtMsgFile.Text.Length == 0))
{
errorProvider.SetError(txtMsgFile, "What am I supposed to hide?");
}
else if (rdoMsgText.Checked && (txtMessage.Text.Length == 0))
{
errorProvider.SetError(txtMessage, "What am I supposed to hide?");
}
else
{
Stream sourceStream = null;
FileStream destinationStream = null;
WaveStream audioStream = null;
//create a stream that contains the message, preceeded by its length
Stream messageStream = GetMessageStream();
//open the key file
Stream keyStream = new FileStream(txtKeyFile.Text, FileMode.Open);
try {
//how man samples do we need?
long countSamplesRequired = WaveUtility.CheckKeyForMessage(keyStream, messageStream.Length);
if (countSamplesRequired > Int32.MaxValue)
{
throw new Exception("Message too long, or bad key! This message/key combination requires " + countSamplesRequired + " samples, only " + Int32.MaxValue + " samples are allowed.");
}
if (rdoSrcFile.Checked) //use a .wav file as the carrier
{
sourceStream = new FileStream(txtSrcFile.Text, FileMode.Open);
}
else //record a carrier wave
{
frmRecorder recorder = new frmRecorder(countSamplesRequired);
recorder.ShowDialog(this);
sourceStream = recorder.RecordedStream;
}
this.Cursor = Cursors.WaitCursor;
//create an empty file for the carrier wave
destinationStream = new FileStream(txtDstFile.Text, FileMode.Create);
//copy the carrier file's header
audioStream = new WaveStream(sourceStream, destinationStream);
if (audioStream.Length <= 0)
{
throw new Exception("Invalid WAV file");
}
//are there enough samples in the carrier wave?
if (countSamplesRequired > audioStream.CountSamples)
{
String errorReport = "The carrier file is too small for this message and key!\r\n"
+ "Samples available: " + audioStream.CountSamples + "\r\n"
+ "Samples needed: " + countSamplesRequired;
throw new Exception(errorReport);
}
//hide the message
WaveUtility utility = new WaveUtility(audioStream, destinationStream);
utility.Hide(messageStream, keyStream);
}
catch (Exception ex) {
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally{
if (keyStream != null)
{
keyStream.Close();
}
if (messageStream != null)
{
messageStream.Close();
}
if (audioStream != null)
{
audioStream.Close();
}
if (sourceStream != null)
{
sourceStream.Close();
}
if (destinationStream != null)
{
destinationStream.Close();
}
this.Cursor = Cursors.Default;
}
}
}
private void btnExtract_Click(object sender, System.EventArgs e)
{
if(txtSrcFile.Text.Length == 0){
errorProvider.SetError(txtSrcFile, "You forgot to choose a carrier file.");
}
else if(txtKeyFile.Text.Length == 0){
errorProvider.SetError(txtKeyFile, "You forgot to choose a key file.");
}
else{
this.Cursor = Cursors.WaitCursor;
FileStream sourceStream = null;
WaveStream audioStream = null;
MemoryStream messageStream = new MemoryStream();
Stream keyStream = new FileStream(txtKeyFile.Text, FileMode.Open);
try {
sourceStream = new FileStream(txtSrcFile.Text, FileMode.Open);
audioStream = new WaveStream(sourceStream);
WaveUtility utility = new WaveUtility(audioStream);
utility.Extract(messageStream, keyStream);
messageStream.Seek(0, SeekOrigin.Begin);
if(rdoMessageDstFile.Checked){ //save result to a file
FileStream fs = new FileStream(txtMessageDstFile.Text, FileMode.Create);
byte[] buffer = new byte[messageStream.Length];
messageStream.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, buffer.Length);
fs.Close();
}
else
{
txtExtractedMessage.Text = new StreamReader(messageStream).ReadToEnd();
}
}
catch(Exception ex) {
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally{
if(keyStream != null){ keyStream.Close(); }
if(messageStream != null){ messageStream.Close(); }
if(audioStream != null){ audioStream.Close(); }
if(sourceStream != null){ sourceStream.Close(); }
this.Cursor = Cursors.Default;
}
}
}
private void btnHide_Click(object sender, System.EventArgs e)
{
if (rdoSrcFile.Checked && (txtSrcFile.Text.Length == 0))
{
errorProvider.SetError(txtSrcFile, "You forgot to choose a carrier file.");
}
else if (txtKeyFile.Text.Length == 0)
{
errorProvider.SetError(txtKeyFile, "You forgot to choose a key file.");
}
else if (txtDstFile.Text.Length == 0)
{
errorProvider.SetError(txtDstFile, "The resulting carrier file must be saved somewhere.");
}
else if (rdoMsgFile.Checked && (txtMsgFile.Text.Length == 0))
{
errorProvider.SetError(txtMsgFile, "What am I supposed to hide?");
}
else if (rdoMsgText.Checked && (txtMessage.Text.Length == 0))
{
errorProvider.SetError(txtMessage, "What am I supposed to hide?");
}
else
{
MessageBox.Show("alert");
Stream sourceStream = null;
FileStream destinationStream = null;
WaveStream audioStream = null;
Stream messageStream = GetMessageStream();
Stream keyStream = new FileStream(txtKeyFile.Text, FileMode.Open);
try {
long countSamplesRequired = WaveUtility.CheckKeyForMessage(keyStream, messageStream.Length);
if (countSamplesRequired > Int32.MaxValue)
{
throw new Exception("Message too long, or bad key! This message/key combination requires " + countSamplesRequired + " samples, only " + Int32.MaxValue + " samples are allowed.");
}
if (rdoSrcFile.Checked)
{
sourceStream = new FileStream(txtSrcFile.Text, FileMode.Open);
}
else
{
}
this.Cursor = Cursors.WaitCursor;
destinationStream = new FileStream(txtDstFile.Text, FileMode.Create);
audioStream = new WaveStream(sourceStream, destinationStream);
if (audioStream.Length <= 0)
{
throw new Exception("Invalid WAV file");
}
if (countSamplesRequired > audioStream.CountSamples)
{
String errorReport = "The carrier file is too small for this message and key!\r\n"
+ "Samples available: " + audioStream.CountSamples + "\r\n"
+ "Samples needed: " + countSamplesRequired;
throw new Exception(errorReport);
}
WaveUtility utility = new WaveUtility(audioStream, destinationStream);
utility.Hide(messageStream, keyStream);
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally{
if (keyStream != null)
{
keyStream.Close();
}
if (messageStream != null)
{
messageStream.Close();
}
if (audioStream != null)
{
audioStream.Close();
}
if (sourceStream != null)
{
sourceStream.Close();
}
if (destinationStream != null)
{
destinationStream.Close();
}
this.Cursor = Cursors.Default;
}
}
}
private void btnHide_Click(object sender, System.EventArgs e)
{
if(rdoSrcFile.Checked && (txtSrcFile.Text.Length == 0)){
errorProvider.SetError(txtSrcFile, "You forgot to choose a carrier file.");
}
else if(txtKeyFile.Text.Length == 0){
errorProvider.SetError(txtKeyFile, "You forgot to choose a key file.");
}
else if(txtDstFile.Text.Length == 0){
errorProvider.SetError(txtDstFile, "The resulting carrier file must be saved somewhere.");
}
else if(rdoMsgFile.Checked && (txtMsgFile.Text.Length == 0)){
errorProvider.SetError(txtMsgFile, "What am I supposed to hide?");
}
else if(rdoMsgText.Checked && (txtMessage.Text.Length == 0)){
errorProvider.SetError(txtMessage, "What am I supposed to hide?");
}
else{
MessageBox.Show("alert");
Stream sourceStream = null;
FileStream destinationStream = null;
WaveStream audioStream = null;
Stream messageStream = GetMessageStream();
Stream keyStream = new FileStream(txtKeyFile.Text, FileMode.Open);
try {
long countSamplesRequired = WaveUtility.CheckKeyForMessage(keyStream, messageStream.Length);
if(countSamplesRequired > Int32.MaxValue){
throw new Exception("Message too long, or bad key! This message/key combination requires "+countSamplesRequired+" samples, only "+Int32.MaxValue+" samples are allowed.");
}
if(rdoSrcFile.Checked)
{
sourceStream = new FileStream(txtSrcFile.Text, FileMode.Open);
}
else
{ }
this.Cursor = Cursors.WaitCursor;
destinationStream = new FileStream(txtDstFile.Text, FileMode.Create);
audioStream = new WaveStream(sourceStream, destinationStream);
if (audioStream.Length <= 0){
throw new Exception("Invalid WAV file");
}
if(countSamplesRequired > audioStream.CountSamples){
String errorReport = "The carrier file is too small for this message and key!\r\n"
+ "Samples available: " + audioStream.CountSamples + "\r\n"
+ "Samples needed: " + countSamplesRequired;
throw new Exception(errorReport);
}
WaveUtility utility = new WaveUtility(audioStream, destinationStream);
utility.Hide(messageStream, keyStream);
}
catch(Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally{
if(keyStream != null){ keyStream.Close(); }
if(messageStream != null){ messageStream.Close(); }
if(audioStream != null){ audioStream.Close(); }
if(sourceStream != null){ sourceStream.Close(); }
if(destinationStream != null){ destinationStream.Close(); }
this.Cursor = Cursors.Default;
}
}
}
