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

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 Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

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

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