org.bouncycastle.crypto.agreement
Class DHBasicAgreement

java.lang.Object
  org.bouncycastle.crypto.agreement.DHBasicAgreement

All Implemented Interfaces:

BasicAgreement

public class DHBasicAgreement
extends java.lang.Object
implements BasicAgreement

a Diffie-Hellman key agreement class.

note: This is only the basic algorithm, it doesn't take advantage of long term public keys if they are available. See the DHAgreement class for a "better" implementation.

Field Summary

private DHParameters	dhParams
private DHPrivateKeyParameters	key
private java.security.SecureRandom	random

Constructor Summary

DHBasicAgreement()

Method Summary

java.math.BigInteger	calculateAgreement(CipherParameters pubKey) given a short term public key from a given party calculate the next message in the agreement sequence.
void	init(CipherParameters param) initialise the agreement engine.

Methods inherited from class java.lang.Object

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

Field Detail

key

private DHPrivateKeyParameters key

dhParams

private DHParameters dhParams

random

private java.security.SecureRandom random

Constructor Detail

DHBasicAgreement

public DHBasicAgreement()

Method Detail

init

public void init(CipherParameters param)

Description copied from interface: BasicAgreement

initialise the agreement engine.

Specified by:

init in interface BasicAgreement

calculateAgreement

public java.math.BigInteger calculateAgreement(CipherParameters pubKey)

given a short term public key from a given party calculate the next message in the agreement sequence.

Specified by:

calculateAgreement in interface BasicAgreement