Module java.base

Package java.security.spec

Class XECPublicKeySpec

java.lang.Object

java.security.spec.XECPublicKeySpec

All Implemented Interfaces:

KeySpec

public class XECPublicKeySpec
extends Object
implements KeySpec

A class representing elliptic curve public keys as defined in RFC 7748, including the curve and other algorithm parameters. The public key is a particular point on the curve, which is represented using only its u-coordinate. A u-coordinate is an element of the field of integers modulo some value that is determined by the algorithm parameters. This field element is represented by a BigInteger which may hold any value. That is, the BigInteger is not restricted to the range of canonical field elements.

Since:

11

Constructor Summary

Constructors

Constructor	Description
XECPublicKeySpec(AlgorithmParameterSpec params, BigInteger u)	Construct a public key spec using the supplied parameters and u coordinate.

Method Summary

Modifier and Type	Method	Description
AlgorithmParameterSpec	getParams()	Get the algorithm parameters that define the curve and other settings.
BigInteger	getU()	Get the u coordinate of the point.

Methods declared in class java.lang.Object

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

Constructor Details

XECPublicKeySpec

public XECPublicKeySpec(AlgorithmParameterSpec params,
 BigInteger u)

Construct a public key spec using the supplied parameters and u coordinate.

Parameters:

params - the algorithm parameters

u - the u-coordinate of the point, represented using a BigInteger which may hold any value

Throws:

NullPointerException - if params or u is null.

Method Details

getParams

public AlgorithmParameterSpec getParams()

Get the algorithm parameters that define the curve and other settings.

Returns:

the parameters

getU

public BigInteger getU()

Get the u coordinate of the point.

Returns:

the u-coordinate, represented using a BigInteger which may hold any value