org.cryptacular.bean

Class AbstractHashBean

java.lang.Object

org.cryptacular.bean.AbstractHashBean

Direct Known Subclasses:

EncodingHashBean, SimpleHashBean

public abstract class AbstractHashBean
extends Object

Abstract base class for all hash beans.

Author:

Middleware Services

Constructor Summary

Constructors

Constructor and Description
AbstractHashBean() Creates a new instance.
AbstractHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec, int iterations) Creates a new instance by specifying all properties.

Method Summary

Modifier and Type	Method and Description
protected boolean	compareInternal(byte[] hash, Object... data) Compares the hash of the given data against a known hash output.
Spec<org.bouncycastle.crypto.Digest>	getDigestSpec()
int	getIterations()
protected byte[]	hashInternal(Object... data) Hashes the given data.
void	setDigestSpec(Spec<org.bouncycastle.crypto.Digest> digestSpec) Sets the digest specification that determines the instance of Digest used to compute the hash.
void	setIterations(int iterations) Sets the number of iterations the digest function is applied to the input data.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractHashBean

public AbstractHashBean()

Creates a new instance.

AbstractHashBean

public AbstractHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec,
                        int iterations)

Creates a new instance by specifying all properties.

Parameters:

digestSpec - Digest specification.

iterations - Number of hash rounds.

Method Detail

getDigestSpec

public Spec<org.bouncycastle.crypto.Digest> getDigestSpec()

Returns:

Digest specification that determines the instance of Digest used to compute the hash.

setDigestSpec

public void setDigestSpec(Spec<org.bouncycastle.crypto.Digest> digestSpec)

Sets the digest specification that determines the instance of Digest used to compute the hash.

Parameters:

digestSpec - Digest algorithm specification.

getIterations

public int getIterations()

Returns:

Number of iterations the digest function is applied to the input data.

setIterations

public void setIterations(int iterations)

Sets the number of iterations the digest function is applied to the input data.

Parameters:

iterations - Number of hash rounds. Default value is 1.

hashInternal

protected byte[] hashInternal(Object... data)

Hashes the given data.

Parameters:

data - Data to hash.

Returns:

Digest output.

compareInternal

protected boolean compareInternal(byte[] hash,
                                  Object... data)

Compares the hash of the given data against a known hash output.

Parameters:

hash - Known hash value. If the length of the array is greater than the length of the digest output, anything beyond the digest length is considered salt data that is hashed after the input data.

data - Data to hash.

Returns:

True if hashed data equals known hash output, false otherwise.