///An interface for obtaining an IObject given a moniker string.
///A moniker can be used to obtain a particular object using a human-readable string to describe it,
///rather than having to know the object's UUID. Human-readable strings are, unfortunately, not
///guaranteed to be universally unique, so you might (theoretically) not get the object you want.
///It is an object that implements the IMoniker interface. A moniker acts as a name that uniquely
///identifies a COM object. In the same way that a path identifies a file in the file system,
///a moniker identifies a COM object in the directory namespace.
///A COM object that is used to create instances of other objects. Monikers save programmers time
///when coding various types of COM-based functions such as linking one document to another (OLE). See COM and OLE.
/// <summary>
/// Start capturing
/// </summary>
private bool Initialize()
{
if (this._selectDevice == null)
{
return(false);
}
if (this._selectDevice.CaptureDevice == null)
{
return(false);
}
IMoniker moniker = this._selectDevice.CaptureDevice.Moniker;
if (moniker == null)
{
UIMessage.Info("Please select a capturing device", TITLE);
return(false);
}
if (string.IsNullOrEmpty(this.txt_saveCapturedPath.Text))
{
UIMessage.Info("Please select a path to save captured video", TITLE);
return(false);
}
if (string.IsNullOrEmpty(this.txt_keyLive.Text))
{
UIMessage.Info("Key lenght must be atleast 4 characters and atmost 256 characters", TITLE);
return(false);
}
this._liveProcessor = new CaptureStegoProcess(moniker);
this._liveProcessor.Setup(this.txt_saveCapturedPath.Text, this.vidOwner);
return(true);
}
private void btn_start_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(this._srcFile))
{
UIMessage.Info("Please select source AVI file for decompression.", TITLE);
return;
}
if (string.IsNullOrEmpty(this._dcFile))
{
UIMessage.Info("Please specify save path for decompressed AVI file.", TITLE);
return;
}
if (this.worker.IsBusy)
{
return;
}
this.worker.RunWorkerAsync();
}
/// <summary>
/// Extract the message from stego object
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_extract_Click(object sender, EventArgs e)
{
this.progress.Value = 0;
if (this._processor == null)
{
UIMessage.Info("No stego object selected to extract data from", "Extract Message");
return;
}
///Check whether user has entered the key
if (this.txt_stegoKey.Text.Length == 0)
{
UIMessage.Info("Please provide the key used to hide the message", "Extract Message");
return;
}
///Run the extraction process in background worker thread
this.backgroundWorker.RunWorkerAsync(new BackgroundWorkerArgs()
{
Action = ActionType.Extract,
Key = this.txt_stegoKey.Text
});
}
/// <summary>
/// Hide the message in cover object
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_hide_Click(object sender, EventArgs e)
{
this.progress.Value = 0;
///If no cover object selected yet
if (this._processor == null)
{
UIMessage.Info("Please select a cover object to hide message in", "Hide Message");
return;
}
///Check the legth of key
if (this.txt_key.Text.Length < 4 || this.txt_key.Text.Length > Stego.Message.MAX_KEY_LEN)
{
UIMessage.Info("Key lenght must be atleast 4 characters and atmost 256 characters",
"Hide Message");
return;
}
///Check if there is enough room in cover object to store secret message and key in it
if (this._hidingCapacity < (this.rtxt_message.Text.Length + this.txt_key.Text.Length + 8))
{
UIMessage.Error("Message is bigger then hiding capacity", "Hide Message");
return;
}
///Initialize the porgress bar
this.progress.Minimum = 0;
this.progress.Maximum = (int)this._processor.HostObject.Length;
///See if user hasn't entered the save path for stego object
if (string.IsNullOrEmpty(this.txt_saveStego.Text))
{
UIMessage.Info("Please select a path to save stego object", "Hide Message");
return;
}
///Run the hiding process in background worker thread
this.backgroundWorker.RunWorkerAsync(new BackgroundWorkerArgs()
{
Action = ActionType.Hide,
Message = new HideIt.Stego.Message(this.txt_key.Text, this.rtxt_message.Text),
SinkPath = this.txt_saveStego.Text
});
using (new Status(this, this.lbl_status, "Logging information in database..."))
{
///data insertion to maintain log table
string _stego_file_name = txt_saveStego.Text;
string _key = txt_key.Text;
string _time = DateTime.Now.ToLongTimeString();
string _date = DateTime.Now.ToShortDateString();
SqlConnection con = new SqlConnection(DB.DbConnectionStr.conect());
///SqlConnection con = new SqlConnection(constr);
SqlCommand query = new SqlCommand("insert into Log_Table values('" + _stego_file_name + "','" + _key + "', '" + _date + "', '" + _time + "')", con);
try
{
con.Open();
query.ExecuteNonQuery();
MessageBox.Show("Record entered successfully.");
con.Close();
}
catch (SqlException ex)
{
UIMessage.Error(ex.Message, TITLE);
}
}
}
/// <summary>
/// Called when new task is registered with background worker
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorkerArgs args = e.Argument as BackgroundWorkerArgs;
///Set the result to args that will be used when operations completes
e.Result = args;
if (args != null)
{
switch (args.Action)
{
case ActionType.Hide:
//User has entered a save path for stego object, start hiding
using (Status status = new Status(this, this.lbl_status, "Hidding..."))
{
RC4 encrypt = new RC4(args.Message.Key, args.Message.SecertMessage);
HideIt.Stego.Message message = new HideIt.Stego.Message(
args.Message.Key, encrypt.ApplyRC4());
using (LockUI lockUi = new LockUI(this))
{
this._processor.Hide(message, args.SinkPath);
//"hide" tab selected
}
}
break;
case ActionType.Extract:
using (Status status = new Status(this, this.lbl_status, "Extracting..."))
{
using (LockUI lockUi = new LockUI(this))
{
args.Message = this._processor.Extract(args.Key);
//"extract" tab selected
}
}
if (args.Message == null)
{
UIMessage.Info("Cannot extract message from stego object because of one of the following reasons:\r\n" +
"-Stego object do no contain any message\r\n" +
"-Key provided do not match with the key used to hide message",
"Extract Message");
return;
}
RC4 decrypt = new RC4(args.Key, args.Message.SecertMessage);
if (this.rtxt_hiddenMsg.InvokeRequired)
{
this.rtxt_hiddenMsg.Invoke((MethodInvoker)(() => { this.rtxt_hiddenMsg.Text = decrypt.ApplyRC4(); }));
}
else
{
this.rtxt_hiddenMsg.Text = decrypt.ApplyRC4();
}
break;
}
}
}
