Package eu.europa.esig.dss.spi

Class DSSMessageDigestCalculator

java.lang.Object

eu.europa.esig.dss.spi.DSSMessageDigestCalculator

public class DSSMessageDigestCalculator
extends Object

This class is used to compute DSSMessageDigest based on the provided input

Constructor Summary

Constructors

Constructor	Description
DSSMessageDigestCalculator(DigestAlgorithm digestAlgorithm)	Default constructor

Method Summary

Modifier and Type	Method	Description
DSSMessageDigest	getMessageDigest()	Returns the DSSMessageDigest accordingly to the current state.
void	update(byte byteToAdd)	Updates the digest using the provided byte
void	update(byte[] bytes)	Updates the digest using the provided array of bytes
void	update(InputStream inputStream)	Updates the digest by reading the provided InputStream.

Methods inherited from class java.lang.Object

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

Constructor Details

DSSMessageDigestCalculator

public DSSMessageDigestCalculator(DigestAlgorithm digestAlgorithm)

Default constructor

Parameters:

digestAlgorithm - DigestAlgorithm to be used for message-digest computation

Method Details

update

public void update(byte byteToAdd)

Updates the digest using the provided byte

Parameters:

byteToAdd - byte to be added for digest computation

update

public void update(byte[] bytes)

Updates the digest using the provided array of bytes

Parameters:

bytes - array of bytes

update

public void update(InputStream inputStream)
            throws IOException

Updates the digest by reading the provided InputStream. NOTE: the method consumes the InputStream, and closes it after.

Parameters:

inputStream - InputStream

Throws:

IOException - if an error is thrown on InputStream reading

getMessageDigest

public DSSMessageDigest getMessageDigest()

Returns the DSSMessageDigest accordingly to the current state. This method resets the state of message-digest.

Returns:

DSSMessageDigest