Package org.bouncycastle.crypto.hash2curve.data

Class AffineXY

  • public final class AffineXY
extends java.lang.Object
    Simple holder for affine field coordinates.

    • Constructor Summary

      Constructors 
      Constructor Description
      AffineXY​(java.math.BigInteger x, java.math.BigInteger y)
      Constructs an AffineXY object representing the affine coordinates of an elliptic curve point.
      AffineXY​(ECPoint point)
      Constructs an AffineXY object representing the affine coordinates of the provided elliptic curve point.
      AffineXY​(ECPoint point, boolean normalize)
      Constructs an AffineXY object representing the affine coordinates of the provided elliptic curve point.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.math.BigInteger getX()
      Retrieves the x-coordinate of the affine point.
      java.math.BigInteger getY()
      Retrieves the y-coordinate of the affine point.
      ECPoint toPoint​(ECCurve curve)
      Converts the affine coordinates of this object into an elliptic curve point on the specified curve.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • AffineXY

        public AffineXY​(java.math.BigInteger x,
                java.math.BigInteger y)
        Constructs an AffineXY object representing the affine coordinates of an elliptic curve point.
        Parameters:
        x - the x-coordinate of the affine point
        y - the y-coordinate of the affine point

      • AffineXY

        public AffineXY​(ECPoint point)
        Constructs an AffineXY object representing the affine coordinates of the provided elliptic curve point.
        Parameters:
        point - the elliptic curve point from which the affine coordinates will be extracted
        Throws:
        java.lang.IllegalArgumentException - if the provided point is at infinity

      • AffineXY

        public AffineXY​(ECPoint point,
                boolean normalize)
        Constructs an AffineXY object representing the affine coordinates of the provided elliptic curve point.
        Parameters:
        point - the elliptic curve point from which the affine coordinates will be extracted
        normalize - true if the point should be normalized before extracting coordinates, false otherwise
        Throws:
        java.lang.IllegalArgumentException - if the provided point is at infinity

    • Method Detail

      • toPoint

        public ECPoint toPoint​(ECCurve curve)
        Converts the affine coordinates of this object into an elliptic curve point on the specified curve.
        Parameters:
        curve - the elliptic curve to which the point belongs
        Returns:
        an ECPoint object created using the affine coordinates of this object on the given curve

      • getX

        public java.math.BigInteger getX()
        Retrieves the x-coordinate of the affine point.
        Returns:
        the x-coordinate as a BigInteger

      • getY

        public java.math.BigInteger getY()
        Retrieves the y-coordinate of the affine point.
        Returns:
        the y-coordinate as a BigInteger