Module java.base
Package java.security.spec

Class EdECPoint

java.lang.Object
java.security.spec.EdECPoint
public final class EdECPoint extends Object
An elliptic curve point used to specify keys as defined by RFC 8032: Edwards-Curve Digital Signature Algorithm (EdDSA). These points are distinct from the points represented by ECPoint, and they are intended for use with algorithms based on RFC 8032 such as the EdDSA Signature algorithm.

An EdEC point is specified by its y-coordinate value and a boolean that indicates whether the x-coordinate is odd. The y-coordinate is an element of the field of integers modulo some value p that is determined by the algorithm parameters. This field element is represented by a BigInteger, and implementations that consume objects of this class may reject integer values which are not in the range [0, p).

Since:
15

  • Constructor Details

    • EdECPoint

      public EdECPoint(boolean xOdd, BigInteger y)
      Construct an EdECPoint.
      Parameters:
      xOdd - whether the x-coordinate is odd.
      y - the y-coordinate, represented using a BigInteger.
      Throws:
      NullPointerException - if y is null.

  • Method Details

    • isXOdd

      public boolean isXOdd()
      Get whether the x-coordinate of the point is odd.
      Returns:
      a boolean indicating whether the x-coordinate is odd.

    • getY

      public BigInteger getY()
      Get the y-coordinate of the point.
      Returns:
      the y-coordinate, represented using a BigInteger.