Curve25519Point (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.math.ec.ECPoint
- - org.bouncycastle.math.ec.ECPoint.AbstractFp
  - - org.bouncycastle.math.ec.custom.djb.Curve25519Point

public class Curve25519Point
extends ECPoint.AbstractFp

Nested Class Summary
- Nested classes/interfaces inherited from class org.bouncycastle.math.ec.ECPoint
  ECPoint.AbstractF2m, ECPoint.AbstractFp, ECPoint.F2m, ECPoint.Fp

Field Summary
- Fields inherited from class org.bouncycastle.math.ec.ECPoint
  curve, EMPTY_ZS, preCompTable, withCompression, x, y, zs

Constructor Summary

Constructors
Constructor	Description
`Curve25519Point(ECCurve curve, ECFieldElement x, ECFieldElement y)`	Deprecated. Use ECCurve.createPoint to construct points
`Curve25519Point(ECCurve curve, ECFieldElement x, ECFieldElement y, boolean withCompression)`	Deprecated. per-point compression property will be removed, refer `ECPoint.getEncoded(boolean)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ECPoint`	`add(ECPoint b)`
`protected Curve25519FieldElement`	`calculateJacobianModifiedW(Curve25519FieldElement Z, int[] ZSquared)`
`protected ECPoint`	`detach()`
`protected Curve25519FieldElement`	`getJacobianModifiedW()`
`ECFieldElement`	`getZCoord(int index)`
`ECPoint`	`negate()`
`ECPoint`	`threeTimes()`
`ECPoint`	`twice()`
`protected Curve25519Point`	`twiceJacobianModified(boolean calculateW)`
`ECPoint`	`twicePlus(ECPoint b)`

Methods inherited from class org.bouncycastle.math.ec.ECPoint
checkNormalized, createScaledPoint, equals, equals, getAffineXCoord, getAffineYCoord, getCurve, getCurveCoordinateSystem, getDetachedPoint, getEncoded, getEncoded, getInitialZCoords, getRawXCoord, getRawYCoord, getRawZCoords, getXCoord, getYCoord, getZCoords, hashCode, isCompressed, isInfinity, isNormalized, isValid, multiply, normalize, satisfiesOrder, scaleX, scaleY, timesPow2, toString

Methods inherited from class org.bouncycastle.math.ec.ECPoint.AbstractFp
getCompressionYTilde, satisfiesCurveEquation, subtract

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail
- Curve25519Point
```
public Curve25519Point(ECCurve curve,
                       ECFieldElement x,
                       ECFieldElement y)
```
  Deprecated.
  Use ECCurve.createPoint to construct points
  
  Create a point which encodes with point compression.
  
  Parameters:
  
  curve - the curve to use
  
  x - affine x co-ordinate
  
  y - affine y co-ordinate
- Curve25519Point
```
public Curve25519Point(ECCurve curve,
                       ECFieldElement x,
                       ECFieldElement y,
                       boolean withCompression)
```
  Deprecated.
  per-point compression property will be removed, refer ECPoint.getEncoded(boolean)
  
  Create a point that encodes with or without point compresion.
  
  Parameters:
  
  curve - the curve to use
  
  x - affine x co-ordinate
  
  y - affine y co-ordinate
  
  withCompression - if true encode with point compression

Method Detail

detach
```
protected ECPoint detach()
```
Specified by:

detach in class ECPoint

getZCoord

public ECFieldElement getZCoord(int index)

Overrides:: getZCoord in class ECPoint

add
```
public ECPoint add(ECPoint b)
```
Specified by:

add in class ECPoint

twice
```
public ECPoint twice()
```
Specified by:

twice in class ECPoint

twicePlus

public ECPoint twicePlus(ECPoint b)

Overrides:: twicePlus in class ECPoint

threeTimes
```
public ECPoint threeTimes()
```
Overrides:

threeTimes in class ECPoint

negate
```
public ECPoint negate()
```
Specified by:

negate in class ECPoint

calculateJacobianModifiedW

protected Curve25519FieldElement calculateJacobianModifiedW(Curve25519FieldElement Z,
                                                            int[] ZSquared)

getJacobianModifiedW

protected Curve25519FieldElement getJacobianModifiedW()

twiceJacobianModified

protected Curve25519Point twiceJacobianModified(boolean calculateW)

Class Curve25519Point

Nested Class Summary

Nested classes/interfaces inherited from class org.bouncycastle.math.ec.ECPoint

Field Summary

Fields inherited from class org.bouncycastle.math.ec.ECPoint

Constructor Summary

Method Summary

Methods inherited from class org.bouncycastle.math.ec.ECPoint

Methods inherited from class org.bouncycastle.math.ec.ECPoint.AbstractFp

Methods inherited from class java.lang.Object

Constructor Detail

Curve25519Point

Curve25519Point

Method Detail

detach

getZCoord

add

twice

twicePlus

threeTimes

negate

calculateJacobianModifiedW

getJacobianModifiedW

twiceJacobianModified