net.sourceforge.openstego
Class OpenStego

java.lang.Object
  extended by net.sourceforge.openstego.OpenStego

public class OpenStego
extends java.lang.Object

This is the main class for OpenStego. It includes the main(java.lang.String[]) method which provides the command line interface for the tool. It also has API methods which can be used by external programs when using OpenStego as a library.


Field Summary
static java.lang.String NAMESPACE
          Constant for the namespace for labels
 
Constructor Summary
OpenStego(OpenStegoPlugin plugin)
          Constructor using the default configuration
OpenStego(OpenStegoPlugin plugin, java.util.Map propMap)
          Constructor with configuration data in the form of Map
OpenStego(OpenStegoPlugin plugin, OpenStegoConfig config)
          Constructor using OpenStegoConfig object
 
Method Summary
 double checkMark(byte[] stegoData, java.lang.String stegoFileName, byte[] origSigData)
          Method to check the correlation for the given image and the original signature
 double checkMark(java.io.File stegoFile, java.io.File origSigFile)
          Method to check the correlation for the given image and the original signature (alternate API)
 byte[] embedData(byte[] msg, java.lang.String msgFileName, byte[] cover, java.lang.String coverFileName, java.lang.String stegoFileName)
          Method to embed the message data into the cover data
 byte[] embedData(java.io.File msgFile, java.io.File coverFile, java.lang.String stegoFileName)
          Method to embed the message data into the cover data (alternate API)
 byte[] embedMark(byte[] sig, java.lang.String sigFileName, byte[] cover, java.lang.String coverFileName, java.lang.String stegoFileName)
          Method to embed the watermark signature data into the cover data
 byte[] embedMark(java.io.File sigFile, java.io.File coverFile, java.lang.String stegoFileName)
          Method to embed the watermark signature data into the cover data (alternate API)
 java.util.List extractData(byte[] stegoData, java.lang.String stegoFileName)
          Method to extract the message data from stego data
 java.util.List extractData(java.io.File stegoFile)
          Method to extract the message data from stego data (alternate API)
 byte[] extractMark(byte[] stegoData, java.lang.String stegoFileName, byte[] origSigData)
          Method to extract the watermark data from stego data
 byte[] extractMark(java.io.File stegoFile, java.io.File origSigFile)
          Method to extract the watermark data from stego data (alternate API)
 byte[] generateSignature()
          Method to generate the signature data using the given plugin
 OpenStegoConfig getConfig()
          Get method for configuration data
 byte[] getDiff(byte[] stegoData, java.lang.String stegoFileName, byte[] coverData, java.lang.String coverFileName, java.lang.String diffFileName)
          Method to get difference between original cover file and the stegged file
 byte[] getDiff(java.io.File stegoFile, java.io.File coverFile, java.lang.String diffFileName)
          Method to get difference between original cover file and the stegged file
static void main(java.lang.String[] args)
          Main method for calling openstego from command line.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

NAMESPACE

public static final java.lang.String NAMESPACE
Constant for the namespace for labels

See Also:
Constant Field Values
Constructor Detail

OpenStego

public OpenStego(OpenStegoPlugin plugin)
          throws OpenStegoException
Constructor using the default configuration

Parameters:
plugin - Stego plugin to use
Throws:
OpenStegoException

OpenStego

public OpenStego(OpenStegoPlugin plugin,
                 OpenStegoConfig config)
          throws OpenStegoException
Constructor using OpenStegoConfig object

Parameters:
plugin - Stego plugin to use
config - OpenStegoConfig object with configuration data
Throws:
OpenStegoException

OpenStego

public OpenStego(OpenStegoPlugin plugin,
                 java.util.Map propMap)
          throws OpenStegoException
Constructor with configuration data in the form of Map

Parameters:
plugin - Plugin object
propMap - Map containing the configuration data
Throws:
OpenStegoException
Method Detail

embedData

public byte[] embedData(byte[] msg,
                        java.lang.String msgFileName,
                        byte[] cover,
                        java.lang.String coverFileName,
                        java.lang.String stegoFileName)
                 throws OpenStegoException
Method to embed the message data into the cover data

Parameters:
msg - Message data to be embedded
msgFileName - Name of the message file
cover - Cover data into which message data needs to be embedded
coverFileName - Name of the cover file
stegoFileName - Name of the output stego file
Returns:
Stego data containing the embedded message
Throws:
OpenStegoException

embedData

public byte[] embedData(java.io.File msgFile,
                        java.io.File coverFile,
                        java.lang.String stegoFileName)
                 throws OpenStegoException
Method to embed the message data into the cover data (alternate API)

Parameters:
msgFile - File containing the message data to be embedded
coverFile - Cover file into which data needs to be embedded
stegoFileName - Name of the output stego file
Returns:
Stego data containing the embedded message
Throws:
OpenStegoException

embedMark

public byte[] embedMark(byte[] sig,
                        java.lang.String sigFileName,
                        byte[] cover,
                        java.lang.String coverFileName,
                        java.lang.String stegoFileName)
                 throws OpenStegoException
Method to embed the watermark signature data into the cover data

Parameters:
sig - Signature data to be embedded
sigFileName - Name of the signature file
cover - Cover data into which signature data needs to be embedded
coverFileName - Name of the cover file
stegoFileName - Name of the output stego file
Returns:
Stego data containing the embedded signature
Throws:
OpenStegoException

embedMark

public byte[] embedMark(java.io.File sigFile,
                        java.io.File coverFile,
                        java.lang.String stegoFileName)
                 throws OpenStegoException
Method to embed the watermark signature data into the cover data (alternate API)

Parameters:
sigFile - File containing the signature data to be embedded
coverFile - Cover file into which data needs to be embedded
stegoFileName - Name of the output stego file
Returns:
Stego data containing the embedded signature
Throws:
OpenStegoException

extractData

public java.util.List extractData(byte[] stegoData,
                                  java.lang.String stegoFileName)
                           throws OpenStegoException
Method to extract the message data from stego data

Parameters:
stegoData - Stego data from which the message needs to be extracted
stegoFileName - Name of the stego file
Returns:
Extracted message (List's first element is filename and second element is the message as byte array)
Throws:
OpenStegoException

extractData

public java.util.List extractData(java.io.File stegoFile)
                           throws OpenStegoException
Method to extract the message data from stego data (alternate API)

Parameters:
stegoFile - Stego file from which message needs to be extracted
Returns:
Extracted message (List's first element is filename and second element is the message as byte array)
Throws:
OpenStegoException

extractMark

public byte[] extractMark(byte[] stegoData,
                          java.lang.String stegoFileName,
                          byte[] origSigData)
                   throws OpenStegoException
Method to extract the watermark data from stego data

Parameters:
stegoData - Stego data from which the watermark needs to be extracted
stegoFileName - Name of the stego file
origSigData - Original signature data
Returns:
Extracted watermark
Throws:
OpenStegoException

extractMark

public byte[] extractMark(java.io.File stegoFile,
                          java.io.File origSigFile)
                   throws OpenStegoException
Method to extract the watermark data from stego data (alternate API)

Parameters:
stegoFile - Stego file from which watermark needs to be extracted
origSigFile - Original signature file
Returns:
Extracted watermark
Throws:
OpenStegoException

checkMark

public double checkMark(byte[] stegoData,
                        java.lang.String stegoFileName,
                        byte[] origSigData)
                 throws OpenStegoException
Method to check the correlation for the given image and the original signature

Parameters:
stegoData - Stego data containing the watermark
stegoFileName - Name of the stego file
origSigData - Original signature data
Returns:
Correlation
Throws:
OpenStegoException

checkMark

public double checkMark(java.io.File stegoFile,
                        java.io.File origSigFile)
                 throws OpenStegoException
Method to check the correlation for the given image and the original signature (alternate API)

Parameters:
stegoFile - Stego file from which watermark needs to be extracted
origSigFile - Original signature file
Returns:
Correlation
Throws:
OpenStegoException

generateSignature

public byte[] generateSignature()
                         throws OpenStegoException
Method to generate the signature data using the given plugin

Returns:
Signature data
Throws:
OpenStegoException

getDiff

public byte[] getDiff(byte[] stegoData,
                      java.lang.String stegoFileName,
                      byte[] coverData,
                      java.lang.String coverFileName,
                      java.lang.String diffFileName)
               throws OpenStegoException
Method to get difference between original cover file and the stegged file

Parameters:
stegoData - Stego data containing the embedded data
stegoFileName - Name of the stego file
coverData - Original cover data
coverFileName - Name of the cover file
diffFileName - Name of the output difference file
Returns:
Difference data
Throws:
OpenStegoException

getDiff

public byte[] getDiff(java.io.File stegoFile,
                      java.io.File coverFile,
                      java.lang.String diffFileName)
               throws OpenStegoException
Method to get difference between original cover file and the stegged file

Parameters:
stegoFile - Stego file containing the embedded data
coverFile - Original cover file
diffFileName - Name of the output difference file
Returns:
Difference data
Throws:
OpenStegoException

getConfig

public OpenStegoConfig getConfig()
Get method for configuration data

Returns:
Configuration data

main

public static void main(java.lang.String[] args)
Main method for calling openstego from command line.

Parameters:
args - Command line arguments


Copyright © 2007-2009 Samir Vaidya. All Rights Reserved.