Class XECPrivateKeySpec

java.lang.Object

java.security.spec.XECPrivateKeySpec

All Implemented Interfaces:: KeySpec

public class XECPrivateKeySpec extends Object implements KeySpec

A class representing elliptic curve private keys as defined in RFC 7748, including the curve and other algorithm parameters. The private key is represented as an encoded scalar value. The decoding procedure defined in the RFC includes an operation that forces certain bits of the key to either 1 or 0. This operation is known as "pruning" or "clamping" the private key. All arrays in this spec are unpruned, and implementations will need to prune the array before using it in any numerical operations.

Since:: 11

Constructor Summary

Constructor	Description
`XECPrivateKeySpec(AlgorithmParameterSpec params, byte[] scalar)`	Construct a private key spec using the supplied parameters and encoded scalar value.

Method Summary

Modifier and Type	Method	Description
`AlgorithmParameterSpec`	`getParams()`	Get the algorithm parameters that define the curve and other settings.
`byte[]`	`getScalar()`	Get the scalar value encoded as an unpruned byte array.

Methods declared in class Object

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

Constructor Details

XECPrivateKeySpec

public XECPrivateKeySpec(AlgorithmParameterSpec params, byte[] scalar)

Construct a private key spec using the supplied parameters and encoded scalar value.

Parameters:: params - the algorithm parameters; scalar - the unpruned encoded scalar value. This array is copied to protect against subsequent modification.
Throws:: NullPointerException - if params or scalar is null.

Method Details

getParams

public AlgorithmParameterSpec getParams()

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

Returns:: the algorithm parameters

getScalar

public byte[] getScalar()

Get the scalar value encoded as an unpruned byte array. A new copy of the array is returned each time this method is called.

Returns:: the unpruned encoded scalar value

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https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/security/spec/XECPrivateKeySpec.html