XECPrivateKeySpec

public class XECPrivateKeySpec
extends Object implements KeySpec

java.lang.Object
   ↳ java.security.spec.XECPrivateKeySpec


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.

Summary

Public constructors

XECPrivateKeySpec(AlgorithmParameterSpec params, byte[] scalar)

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

Public methods

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.

Inherited methods

Public constructors

XECPrivateKeySpec

Added in API level 33
public XECPrivateKeySpec (AlgorithmParameterSpec params, 
                byte[] scalar)

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

Parameters
params AlgorithmParameterSpec: the algorithm parameters

scalar byte: the unpruned encoded scalar value. This array is copied to protect against subsequent modification.

Throws
NullPointerException if params or scalar is null.

Public methods

getParams

Added in API level 33
public AlgorithmParameterSpec getParams ()

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

Returns
AlgorithmParameterSpec the algorithm parameters

getScalar

Added in API level 33
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
byte[] the unpruned encoded scalar value