ibm.security.internal.spec

Class HKDFExpandParameterSpec

java.lang.Object

ibm.security.internal.spec.HKDFExpandParameterSpec

All Implemented Interfaces:

java.security.spec.AlgorithmParameterSpec

public class HKDFExpandParameterSpec
extends java.lang.Object
implements java.security.spec.AlgorithmParameterSpec

This class specifies the set of parameters used with HKDFExpandParameterSpec

Since:

1.8

Constructor Summary

Constructors

Constructor and Description
HKDFExpandParameterSpec(byte[] prk, byte[] info, long okmLength, java.lang.String keyAlgorithm) Constructs a parameter set for HKDFExpandParameterSpec from the given Psuedo Random Key material, the info, output key material length and the Key Algorithm.
HKDFExpandParameterSpec(SecretKey prk, byte[] info, long okmLength, java.lang.String keyAlgorithm) Constructs a parameter set for HKDFExpandParameterSpec from the given Psuedo Random Key, the info, output key material length and the Key Algorithm.

Method Summary

Modifier and Type	Method and Description
byte[]	getInfo() Returns the info that contains optional context and application specific information
java.lang.String	getKeyAlgorithm() Returns the name of the key algorithm
long	getOkmLength() Returns the length of output Key Material
byte[]	getPrk() Returns the Psuedo Random Key material

Methods inherited from class java.lang.Object

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

Constructor Detail

HKDFExpandParameterSpec

public HKDFExpandParameterSpec(byte[] prk,
                               byte[] info,
                               long okmLength,
                               java.lang.String keyAlgorithm)

Constructs a parameter set for HKDFExpandParameterSpec from the given Psuedo Random Key material, the info, output key material length and the Key Algorithm. The parameters are copied from the parameters to protect against subsequent modification.

Parameters:

prk - the Psuedo Random Key material.

info - the info that contains optional context and application specific information.

okmLength - output key material length.

keyAlgorithm - The name of the algorithm to use when creating SecretKey.

Throws:

java.lang.IllegalArgumentException - if Psuedo Random Key material is null

HKDFExpandParameterSpec

public HKDFExpandParameterSpec(SecretKey prk,
                               byte[] info,
                               long okmLength,
                               java.lang.String keyAlgorithm)

Constructs a parameter set for HKDFExpandParameterSpec from the given Psuedo Random Key, the info, output key material length and the Key Algorithm. The parameters are copied from the parameters to protect against subsequent modification.

Parameters:

prk - The pseudo random key. Cannot be null.

info - the info that contains optional context and application specific informationn.

okmLength - output key material length.

keyAlgorithm - the name of the algorithm to use when creating SecretKey.

Throws:

java.lang.IllegalArgumentException - if Psuedo Random Key material is null

Method Detail

getInfo

public byte[] getInfo()

Returns the info that contains optional context and application specific information

Returns:

the info. Returns a new array each time this method is called.

getPrk

public byte[] getPrk()

Returns the Psuedo Random Key material

Returns:

the Psuedo Random Key material

getKeyAlgorithm

public java.lang.String getKeyAlgorithm()

Returns the name of the key algorithm

Returns:

the name of the key algorithm

getOkmLength

public long getOkmLength()

Returns the length of output Key Material

Returns:

the length of output Key Material