org.bouncycastle.jcajce.spec

Class PBKDF2ParameterSpec

java.lang.Object

javax.crypto.spec.PBEParameterSpec

org.bouncycastle.jcajce.spec.PBKDF2ParameterSpec

All Implemented Interfaces:

java.security.spec.AlgorithmParameterSpec

public class PBKDF2ParameterSpec
extends javax.crypto.spec.PBEParameterSpec

PBEParameterSpec allowing for the use of alternate PRFs with PBKDF2.

Constructor Summary

Constructors

Constructor and Description
PBKDF2ParameterSpec(byte[] salt, int iterationCount, int keySize) Base constructor with the default PRF.
PBKDF2ParameterSpec(byte[] salt, int iterationCount, int keySize, AlgorithmIdentifier prf) Constructor that allows specifying a PRF.
PBKDF2ParameterSpec(byte[] salt, int iterationCount, int keySize, DigestAlgorithm prfAlgorithm) Constructor that allows specifying a PRF using an Algorithm.

Method Summary

Modifier and Type	Method and Description
int	getKeySize() Return the key size (in bits) for the key to be derived.
AlgorithmIdentifier	getPrf() Return an AlgorithmIdentifier representing the PRF.
boolean	isDefaultPrf() Return true if this spec is for the default PRF (HmacSHA1), false otherwise.

Methods inherited from class javax.crypto.spec.PBEParameterSpec

getIterationCount, getParameterSpec, getSalt

Methods inherited from class java.lang.Object

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

Constructor Detail

PBKDF2ParameterSpec

public PBKDF2ParameterSpec(byte[] salt,
                           int iterationCount,
                           int keySize)

Base constructor with the default PRF.

Parameters:

salt - salt to use.

iterationCount - iteration count for PBE algorithm.

keySize - keySize in bits.

PBKDF2ParameterSpec

public PBKDF2ParameterSpec(byte[] salt,
                           int iterationCount,
                           int keySize,
                           DigestAlgorithm prfAlgorithm)

Constructor that allows specifying a PRF using an Algorithm.

Parameters:

salt - salt to use.

iterationCount - iteration count for PBE algorithm.

keySize - keySize in bits.

prfAlgorithm - Algorithm identifying the PRF to use.

PBKDF2ParameterSpec

public PBKDF2ParameterSpec(byte[] salt,
                           int iterationCount,
                           int keySize,
                           AlgorithmIdentifier prf)

Constructor that allows specifying a PRF.

Parameters:

salt - salt to use.

iterationCount - iteration count for PBE algorithm.

keySize - keySize in bits.

prf - AlgorithmIdentifier for the PRF to use.

Method Detail

isDefaultPrf

public boolean isDefaultPrf()

Return true if this spec is for the default PRF (HmacSHA1), false otherwise.

Returns:

true if this spec uses the default PRF, false otherwise.

getKeySize

public int getKeySize()

Return the key size (in bits) for the key to be derived.

Returns:

the size of the generated key required.

getPrf

public AlgorithmIdentifier getPrf()

Return an AlgorithmIdentifier representing the PRF.

Returns:

the PRF's AlgorithmIdentifier.