Package org.wildfly.security.digest

Class TruncatedMessageDigest

java.lang.Object

java.security.MessageDigestSpi

java.security.MessageDigest

org.wildfly.security.digest.TruncatedMessageDigest

public final class TruncatedMessageDigest
extends MessageDigest

A message digest that truncates another message digest.

Author:

David M. Lloyd

Field Summary

Fields

Modifier and Type	Field	Description
private int	bytes
private MessageDigest	delegate

Constructor Summary

Constructors

Constructor	Description
TruncatedMessageDigest(MessageDigest delegate, int bytes)	Construct a new instance.

Method Summary

Modifier and Type	Method	Description
Object	clone()
byte[]	digest()
byte[]	digest(byte[] input)
int	digest(byte[] buf, int offset, int len)
protected byte[]	engineDigest()
protected void	engineReset()
protected void	engineUpdate(byte input)
protected void	engineUpdate(byte[] input, int offset, int len)
void	reset()
void	update(byte input)
void	update(byte[] input)
void	update(byte[] input, int offset, int len)

Methods inherited from class java.security.MessageDigest

getAlgorithm, getDigestLength, getInstance, getInstance, getInstance, getProvider, isEqual, toString, update

Methods inherited from class java.security.MessageDigestSpi

engineDigest, engineGetDigestLength, engineUpdate

Methods inherited from class java.lang.Object

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

Field Detail

delegate

private final MessageDigest delegate

bytes

private final int bytes

Constructor Detail

TruncatedMessageDigest

public TruncatedMessageDigest(MessageDigest delegate,
                              int bytes)

Construct a new instance.

Parameters:

delegate - the delegate message digest

bytes - the truncation size

Method Detail

update

public void update(byte input)

Overrides:

update in class MessageDigest

update

public void update(byte[] input,
                   int offset,
                   int len)

Overrides:

update in class MessageDigest

update

public void update(byte[] input)

Overrides:

update in class MessageDigest

digest

public byte[] digest()

Overrides:

digest in class MessageDigest

digest

public int digest(byte[] buf,
                  int offset,
                  int len)
           throws DigestException

Overrides:

digest in class MessageDigest

Throws:

DigestException

digest

public byte[] digest(byte[] input)

Overrides:

digest in class MessageDigest

reset

public void reset()

Overrides:

reset in class MessageDigest

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class MessageDigest

Throws:

CloneNotSupportedException

engineUpdate

protected void engineUpdate(byte input)

Specified by:

engineUpdate in class MessageDigestSpi

engineUpdate

protected void engineUpdate(byte[] input,
                            int offset,
                            int len)

Specified by:

engineUpdate in class MessageDigestSpi

engineDigest

protected byte[] engineDigest()

Specified by:

engineDigest in class MessageDigestSpi

engineReset

protected void engineReset()

Specified by:

engineReset in class MessageDigestSpi