Package com.nimbusds.jose.crypto.impl

Class PRFParams

java.lang.Object

com.nimbusds.jose.crypto.impl.PRFParams

@Immutable
public final class PRFParams
extends Object

Pseudo-Random Function (PRF) parameters, intended for use in the Password- Based Key Derivation Function 2 (PBKDF2).

Version:

2015-05-26

Author:

Vladimir Dzhuvinov

Constructor Summary

Constructors

Constructor	Description
PRFParams(String jcaMacAlg, Provider macProvider, int dkLen)	Creates a new pseudo-random function parameters instance.

Method Summary

Modifier and Type	Method	Description
int	getDerivedKeyByteLength()	Returns the byte length of the key to derive.
String	getMACAlgorithm()	Returns the JCA MAC algorithm name.
Provider	getMacProvider()	Returns the JCA MAC provider.
static PRFParams	resolve(JWEAlgorithm alg, Provider macProvider)	Resolves the Pseudo-Random Function (PRF) parameters for the specified PBES2 JWE algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

PRFParams

public PRFParams(String jcaMacAlg,
                 Provider macProvider,
                 int dkLen)

Creates a new pseudo-random function parameters instance.

Parameters:

jcaMacAlg - The JCA MAC algorithm name. Must not be null.

macProvider - The JCA MAC provider, null to use the default one.

dkLen - The byte length of the key to derive.

Method Detail

getMACAlgorithm

public String getMACAlgorithm()

Returns the JCA MAC algorithm name.

Returns:

The JCA MAC algorithm name.

getMacProvider

public Provider getMacProvider()

Returns the JCA MAC provider.

Returns:

The JCA MAC provider, null to use the default one.

getDerivedKeyByteLength

public int getDerivedKeyByteLength()

Returns the byte length of the key to derive.

Returns:

The byte length of the key to derive.

resolve

public static PRFParams resolve(JWEAlgorithm alg,
                                Provider macProvider)
                         throws JOSEException

Resolves the Pseudo-Random Function (PRF) parameters for the specified PBES2 JWE algorithm.

Parameters:

alg - The JWE algorithm. Must be supported and not null.

macProvider - The specific MAC JCA provider, null to use the default one.

Returns:

The PRF parameters.

Throws:

JOSEException - If the JWE algorithm is not supported.