org.bouncycastle.crypto.agreement.kdf
Class ECDHKEKGenerator

java.lang.Object
  org.bouncycastle.crypto.agreement.kdf.ECDHKEKGenerator

All Implemented Interfaces:

DerivationFunction

public class ECDHKEKGenerator
extends java.lang.Object
implements DerivationFunction

X9.63 based key derivation function for ECDH CMS.

Field Summary

private DERObjectIdentifier	algorithm
private DerivationFunction	kdf
private int	keySize
private byte[]	z

Constructor Summary

ECDHKEKGenerator(Digest digest)

Method Summary

int	generateBytes(byte[] out, int outOff, int len)
Digest	getDigest() return the message digest used as the basis for the function
void	init(DerivationParameters param)
private byte[]	integerToBytes(int keySize)

Methods inherited from class java.lang.Object

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

Field Detail

kdf

private DerivationFunction kdf

algorithm

private DERObjectIdentifier algorithm

keySize

private int keySize

z

private byte[] z

Constructor Detail

ECDHKEKGenerator

public ECDHKEKGenerator(Digest digest)

Method Detail

init

public void init(DerivationParameters param)

Specified by:

init in interface DerivationFunction

getDigest

public Digest getDigest()

Description copied from interface: DerivationFunction

return the message digest used as the basis for the function

Specified by:

getDigest in interface DerivationFunction

generateBytes

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

Specified by:

generateBytes in interface DerivationFunction

Throws:

DataLengthException

java.lang.IllegalArgumentException

integerToBytes

private byte[] integerToBytes(int keySize)