OpenJDK 27 · java.security.spec.XECPublicKeySpec · APIdia, the JavaDoc alternative

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.

Field Summary

Modifier and Type	Field and Description
private final AlgorithmParameterSpec	params
private final BigInteger	u

Constructor Summary

Access	Constructor and Description
public	XECPublicKeySpec(AlgorithmParameterSpec the algorithm parameters params, BigInteger the u-coordinate of the point, represented using a BigInteger which may hold any value u) Construct a public key spec using the supplied parameters and u coordinate.

Method Summary

Modifier and Type	Method and Description
public AlgorithmParameterSpec	Returns: the parameters getParams() Get the algorithm parameters that define the curve and other settings.
public BigInteger	Returns: the u-coordinate, represented using a BigInteger which may hold any value getU() Get the u coordinate of the point.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

params	back to summary
private final AlgorithmParameterSpec params

u	back to summary
private final BigInteger u

Constructor Detail

XECPublicKeySpec back to summary

XECPublicKeySpec	back to summary
public XECPublicKeySpec(AlgorithmParameterSpec params, BigInteger u) Construct a public key spec using the supplied parameters and u coordinate. Parameters params:AlgorithmParameterSpec the algorithm parameters u:BigInteger the u-coordinate of the point, represented using a BigInteger which may hold any value Exceptions NullPointerException: if `params` or `u` is null.

public XECPublicKeySpec(AlgorithmParameterSpec params, BigInteger u)

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

Parameters

params:AlgorithmParameterSpec: the algorithm parameters
u:BigInteger: the u-coordinate of the point, represented using a BigInteger which may hold any value

Exceptions

NullPointerException:: if params or u is null.

Method Detail

getParams	back to summary
public AlgorithmParameterSpec getParams() Get the algorithm parameters that define the curve and other settings. Returns:AlgorithmParameterSpec the parameters

getParams

back to summary

public AlgorithmParameterSpec getParams()

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

Returns:AlgorithmParameterSpec: the parameters

getU	back to summary
public BigInteger getU() Get the u coordinate of the point. Returns:BigInteger the u-coordinate, represented using a BigInteger which may hold any value

getU