edu.vt.middleware.crypt
Class AbstractAlgorithm

java.lang.Object
  edu.vt.middleware.crypt.AbstractAlgorithm

All Implemented Interfaces:

Algorithm

Direct Known Subclasses:

AbstractEncryptionAlgorithm, AbstractRandomizableAlgorithm, SignatureAlgorithm

public abstract class AbstractAlgorithm
extends Object
implements Algorithm

Abstract cryptographic algorithm that is the basis of digest, encryption, and signature algorithms.

Version:

$Revision: 3 $

Author:

Middleware Services

Field Summary

protected String	algorithm Algorithm name.
protected org.apache.commons.logging.Log	logger Logger instance.
protected int	randomByteSize Number of bytes used for random data needs.
protected SecureRandom	randomProvider Provider of secure random data.

Constructor Summary

AbstractAlgorithm()

Method Summary

String	getAlgorithm() Gets the algorithm name.
byte[]	getRandomData(int nBytes) Gets random bytes from the random provider of this instance in the amount specified.
void	setRandomProvider(SecureRandom random) Sets the source of random data for cryptographic operations needing a random data source, such as generating a random salt value.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.apache.commons.logging.Log logger

Logger instance.

algorithm

protected String algorithm

Algorithm name.

randomProvider

protected SecureRandom randomProvider

Provider of secure random data.

randomByteSize

protected int randomByteSize

Number of bytes used for random data needs.

Constructor Detail

AbstractAlgorithm

public AbstractAlgorithm()

Method Detail

getAlgorithm

public String getAlgorithm()

Gets the algorithm name.

Specified by:

getAlgorithm in interface Algorithm

Returns:

Algorithm name.

setRandomProvider

public void setRandomProvider(SecureRandom random)

Sets the source of random data for cryptographic operations needing a random data source, such as generating a random salt value.

Specified by:

setRandomProvider in interface Algorithm

Parameters:

random - Provider of cryptographically strong random data.

toString

public String toString()

Overrides:

toString in class Object

getRandomData

public byte[] getRandomData(int nBytes)

Gets random bytes from the random provider of this instance in the amount specified.

Specified by:

getRandomData in interface Algorithm

Parameters:

nBytes - Number of bytes of random data to retrieve.

Returns:

Byte array of random data.