org.spongycastle.crypto.agreement.kdf

Class ConcatenationKDFGenerator

java.lang.Object

org.spongycastle.crypto.agreement.kdf.ConcatenationKDFGenerator

All Implemented Interfaces:

DerivationFunction

public class ConcatenationKDFGenerator
extends java.lang.Object
implements DerivationFunction

Generator for Concatenation Key Derivation Function defined in NIST SP 800-56A, Sect 5.8.1

Constructor Summary

Constructors

Constructor and Description
ConcatenationKDFGenerator(Digest digest)

Method Summary

Modifier and Type	Method and Description
int	generateBytes(byte[] out, int outOff, int len) fill len bytes of the output buffer with bytes generated from the derivation function.
Digest	getDigest() return the underlying digest.
void	init(DerivationParameters param)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatenationKDFGenerator

public ConcatenationKDFGenerator(Digest digest)

Parameters:

digest - the digest to be used as the source of generated bytes

Method Detail

init

public void init(DerivationParameters param)

Specified by:

init in interface DerivationFunction

getDigest

public Digest getDigest()

return the underlying digest.

generateBytes

public int generateBytes(byte[] out,
                         int outOff,
                         int len)
                  throws DataLengthException,
                         java.lang.IllegalArgumentException

fill len bytes of the output buffer with bytes generated from the derivation function.

Specified by:

generateBytes in interface DerivationFunction

Throws:

DataLengthException - if the out buffer is too small.

java.lang.IllegalArgumentException