iaik.smime

Class SMimeCompressed

java.lang.Object

iaik.cms.CompressedDataStream

iaik.smime.SMimeCompressed

All Implemented Interfaces:

ContentStream

public class SMimeCompressed
extends CompressedDataStream

Field Summary

Fields inherited from class iaik.cms.CompressedDataStream

contentType, DEFAULT_BLOCKSIZE, EXPLICIT, IMPLICIT, m_blockSize, m_compressionAlgorithm, m_encapContentType, m_inputStream, m_version

Constructor Summary

Constructors

Constructor and Description
SMimeCompressed() Creates a new SMimeCompressed object.
SMimeCompressed(java.io.InputStream inputstream) Creates a new SMimeCompressed object where the BER encoded message is read from the given input stream.

Method Summary

Modifier and Type	Method and Description
void	setCompressionAlgorithm(AlgorithmID algorithmid) This method is used to set the Compression algorithm
ASN1Object	toASN1Object(int blocksize) Returns the S/MIME compressed message as an ASN1Object.
void	writeTo(java.io.OutputStream os) Writes this SMimeCompressed object to the supplied output stream.
void	writeTo(java.io.OutputStream os, int blocksize) Writes this SMimeCompressed object to the supplied output stream.

Methods inherited from class iaik.cms.CompressedDataStream

decode, getBlockSize, getCompressionAlgorithm, getCompressionProvider, getContentType, getEncapsulatedContentInfoStream, getEncapsulatedContentType, getInputStream, getMode, getVersion, setBlockSize, setCompressionProvider, setInputStream, toASN1Object, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SMimeCompressed

public SMimeCompressed(java.io.InputStream inputstream)
                throws CMSParsingException,
                       java.io.IOException

Creates a new SMimeCompressed object where the BER encoded message is read from the given input stream.

Do not use this constructor for supplying the content data to be enveloped. This constructor may be used by the recipient for parsing an already exisiting SMimeCompressed object, supplied as BER encoding from an input stream, that may have been created by means of the writeTo method.

Parameters:

inputstream - the input stream where the BER encoded message shall be read from

Throws:

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

CMSParsingException

SMimeCompressed

public SMimeCompressed()

Creates a new SMimeCompressed object. Sets the EncapsulatedContentType to ObjectID.cms_data;

Method Detail

writeTo

public void writeTo(java.io.OutputStream os,
                    int blocksize)
             throws java.io.IOException

Writes this SMimeCompressed object to the supplied output stream. The blockSize parameter indicates the block size to be used for performimg block encoding.

Overrides:

writeTo in class CompressedDataStream

Parameters:

os - the output stream to which this SMimeEncrypted shall be written

blocksize - the block size for using block encoding

Throws:

java.io.IOException - if an I/O error occurs while writing to the stream

writeTo

public void writeTo(java.io.OutputStream os)
             throws java.io.IOException

Writes this SMimeCompressed object to the supplied output stream. Automatically enforces block encoding with a block size of 2048.

Overrides:

writeTo in class CompressedDataStream

Parameters:

os - the output stream to which this SMimeEncrypted shall be written

Throws:

java.io.IOException - if an I/O error occurs while writing to the stream

toASN1Object

public ASN1Object toASN1Object(int blocksize)
                        throws CMSException

Returns the S/MIME compressed message as an ASN1Object. Automatically enforces block encoding with a block size of 2048.

Overrides:

toASN1Object in class CompressedDataStream

Parameters:

blocksize - the block size defining the encoding scheme - and specifying the length of each primitive encoded octet string component, if positive

Returns:

the S/MIME compressed message as an ASN1Object

Throws:

CMSException - if an error occurs while building the ASN.1 object

setCompressionAlgorithm

public void setCompressionAlgorithm(AlgorithmID algorithmid)

This method is used to set the Compression algorithm

Parameters:

algorithmid - the AlgorithmID used to compress the data