Class ECPoint

java.lang.Object

org.gudy.bouncycastle.math.ec.ECPoint

Direct Known Subclasses:

ECPoint.F2m, ECPoint.Fp

public abstract class ECPoint
extends Object

base class for points on elliptic curves.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ECPoint.F2m	Elliptic curve points over F2m
static class	ECPoint.Fp	Elliptic curve points over Fp

Field Summary

Fields

Modifier and Type	Field	Description
private static X9IntegerConverter	converter
(package private) ECCurve	curve
protected ECMultiplier	multiplier
protected PreCompInfo	preCompInfo
protected boolean	withCompression
(package private) ECFieldElement	x
(package private) ECFieldElement	y

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ECPoint(ECCurve curve, ECFieldElement x, ECFieldElement y)

Method Summary

Modifier and Type	Method	Description
abstract ECPoint	add(ECPoint b)
(package private) void	assertECMultiplier()	Sets the default ECMultiplier, unless already set.
boolean	equals(Object other)
ECCurve	getCurve()
abstract byte[]	getEncoded(boolean ignore)
ECFieldElement	getX()
ECFieldElement	getY()
int	hashCode()
boolean	isCompressed()
boolean	isInfinity()
ECPoint	multiply(BigInteger k)	Multiplies this ECPoint by the given number.
abstract ECPoint	negate()
(package private) void	setPreCompInfo(PreCompInfo preCompInfo)	Sets the PreCompInfo.
abstract ECPoint	subtract(ECPoint b)
abstract ECPoint	twice()

Methods inherited from class Object

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

Field Details

curve

ECCurve curve

x

ECFieldElement x

y

ECFieldElement y

withCompression

protected boolean withCompression

multiplier

protected ECMultiplier multiplier

preCompInfo

protected PreCompInfo preCompInfo

converter

private static X9IntegerConverter converter

Constructor Details

ECPoint

protected ECPoint(ECCurve curve,
 ECFieldElement x,
 ECFieldElement y)

Method Details

getCurve

public ECCurve getCurve()

getX

public ECFieldElement getX()

getY

public ECFieldElement getY()

isInfinity

public boolean isInfinity()

isCompressed

public boolean isCompressed()

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

setPreCompInfo

void setPreCompInfo(PreCompInfo preCompInfo)

Sets the PreCompInfo. Used by ECMultipliers to save the precomputation for this ECPoint to store the precomputation result for use by subsequent multiplication.

Parameters:

preCompInfo - The values precomputed by the ECMultiplier.

getEncoded

public abstract byte[] getEncoded(boolean ignore)

add

public abstract ECPoint add(ECPoint b)

subtract

public abstract ECPoint subtract(ECPoint b)

negate

public abstract ECPoint negate()

twice

public abstract ECPoint twice()

assertECMultiplier

void assertECMultiplier()

Sets the default ECMultiplier, unless already set.

multiply

public ECPoint multiply(BigInteger k)

Multiplies this ECPoint by the given number.

Parameters:

k - The multiplicator.

Returns:

k * this.