org.bouncycastle.crypto.params

Class ElGamalPrivateKeyParameters

java.lang.Object

org.bouncycastle.crypto.params.AsymmetricKeyParameter

org.bouncycastle.crypto.params.ElGamalKeyParameters

org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters

All Implemented Interfaces:

javax.security.auth.Destroyable, CipherParameters

public class ElGamalPrivateKeyParameters
extends ElGamalKeyParameters
implements javax.security.auth.Destroyable

Constructor Summary

Constructors

Constructor and Description
ElGamalPrivateKeyParameters(java.math.BigInteger x, ElGamalParameters params)

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroy this object, dropping its reference to the private value.
boolean	equals(java.lang.Object obj)
java.math.BigInteger	getX()
int	hashCode()
boolean	isDestroyed()

Methods inherited from class org.bouncycastle.crypto.params.ElGamalKeyParameters

getParameters

Methods inherited from class org.bouncycastle.crypto.params.AsymmetricKeyParameter

isPrivate

Methods inherited from class java.lang.Object

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

Constructor Detail

ElGamalPrivateKeyParameters

public ElGamalPrivateKeyParameters(java.math.BigInteger x,
                                   ElGamalParameters params)

Method Detail

getX

public java.math.BigInteger getX()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class ElGamalKeyParameters

hashCode

public int hashCode()

Overrides:

hashCode in class ElGamalKeyParameters

destroy

public void destroy()

Destroy this object, dropping its reference to the private value.

As BigInteger is immutable the private value cannot be zeroized in place; destruction drops the internal reference so the value becomes unreachable (cleared on garbage collection). The (public) domain parameters are retained. After destruction getX() throws IllegalStateException, hashCode() retains its pre-destruction value and the object is equal only to itself.

Specified by:

destroy in interface javax.security.auth.Destroyable

isDestroyed

public boolean isDestroyed()

Specified by:

isDestroyed in interface javax.security.auth.Destroyable