Package org.bouncycastle.crypto.agreement

Class XDHBasicAgreement

java.lang.Object

org.bouncycastle.crypto.agreement.XDHBasicAgreement

All Implemented Interfaces:

BasicAgreement

public class XDHBasicAgreement
extends Object
implements BasicAgreement

Key agreement using X25519 or X448. Same as Weierstrauss curve based ECDH, except this uses the U-coordinate while ECDH uses the X-coordinate.

Constructor Summary

Constructors

Constructor	Description
XDHBasicAgreement()

Method Summary

Modifier and Type	Method	Description
BigInteger	calculateAgreement(CipherParameters pubKey)	given a public key from a given party calculate the next message in the agreement sequence.
int	getFieldSize()	return the field size for the agreement algorithm in bytes.
void	init(CipherParameters key)	initialise the agreement engine.

Methods inherited from class java.lang.Object

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

Constructor Details

XDHBasicAgreement

public XDHBasicAgreement()

Method Details

init

public void init(CipherParameters key)

Description copied from interface: BasicAgreement

initialise the agreement engine.

Specified by:

init in interface BasicAgreement

getFieldSize

public int getFieldSize()

Description copied from interface: BasicAgreement

return the field size for the agreement algorithm in bytes.

Specified by:

getFieldSize in interface BasicAgreement

calculateAgreement

public BigInteger calculateAgreement(CipherParameters pubKey)

Description copied from interface: BasicAgreement

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

Specified by:

calculateAgreement in interface BasicAgreement