Exemple #1
0
        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;
                }
            }
        }
Exemple #2
0
        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;
                }
            }
        }