demo.cms.compressedData

Class CompressedDataOutputStreamDemo

java.lang.Object

demo.cms.compressedData.CompressedDataOutputStreamDemo

public class CompressedDataOutputStreamDemo
extends java.lang.Object

Demonstrates the usage of class CompressedDataOutputStream and CompressedDataOutputStream for compressing data using the CMS type CompressedData.

See Also:

CompressedDataOutputStream, CompressedDataStream

Constructor Summary

Constructors

Constructor and Description
CompressedDataOutputStreamDemo() Default constructor.

Method Summary

Modifier and Type	Method and Description
byte[]	createCompressedData(byte[] message) Uses the IAIK-CMS CompressedDataOutputStream class to create a CMS CompressedData object for compressing the given message.
byte[]	getCompressedData(byte[] encoding) Parses a CMS CompressedData object.
static void	main(java.lang.String[] argv) Main method.
void	start() Starts the demo.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompressedDataOutputStreamDemo

public CompressedDataOutputStreamDemo()

Default constructor.

Method Detail

createCompressedData

public byte[] createCompressedData(byte[] message)
                            throws iaik.cms.CMSException,
                                   java.io.IOException

Uses the IAIK-CMS CompressedDataOutputStream class to create a CMS CompressedData object for compressing the given message.

Parameters:

message - the message to be compressed, as byte representation

Returns:

the BER encoding of the CompressedData object just created

Throws:

iaik.cms.CMSException - if the CompressedData object cannot be created

java.io.IOException - if an I/O error occurs

getCompressedData

public byte[] getCompressedData(byte[] encoding)
                         throws iaik.cms.CMSException,
                                java.io.IOException,
                                java.security.NoSuchAlgorithmException

Parses a CMS CompressedData object.

Parameters:

encoding - the CompressedData object as BER encoded byte array

Returns:

the decompressed message as byte array

Throws:

iaik.cms.CMSException - if the CompressedData cannot be parsed

java.io.IOException - if an I/O error occurs

java.security.NoSuchAlgorithmException - if the compression algorithm is not supported

start

public void start()

Starts the demo.

main

public static void main(java.lang.String[] argv)
                 throws java.lang.Exception

Main method.

Throws:

java.lang.Exception