Package org.bouncycastle.math.ec

Class ECPoint.Fp

java.lang.Object

org.bouncycastle.math.ec.ECPoint

org.bouncycastle.math.ec.ECPoint.Fp

Enclosing class:

ECPoint

public static class ECPoint.Fp
extends ECPoint

Elliptic curve points over Fp

Nested Class Summary

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

ECPoint.F2m, ECPoint.Fp

Field Summary

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

multiplier, preCompInfo, withCompression

Constructor Summary

Constructors

Constructor	Description
Fp(ECCurve curve, ECFieldElement x, ECFieldElement y)	Create a point which encodes with point compression.
Fp(ECCurve curve, ECFieldElement x, ECFieldElement y, boolean withCompression)	Create a point that encodes with or without point compresion.

Method Summary

Modifier and Type	Method	Description
ECPoint	add(ECPoint b)
byte[]	getEncoded(boolean compressed)	return the field element encoded with point compression.
ECPoint	negate()
ECPoint	subtract(ECPoint b)
ECPoint	twice()

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

equals, getCurve, getEncoded, getX, getY, hashCode, isCompressed, isInfinity, multiply

Methods inherited from class java.lang.Object

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

Constructor Details

Fp

public Fp(ECCurve curve,
ECFieldElement x,
ECFieldElement y)

Create a point which encodes with point compression.

Parameters:

curve - the curve to use

x - affine x co-ordinate

y - affine y co-ordinate

Fp

public Fp(ECCurve curve,
ECFieldElement x,
ECFieldElement y,
boolean withCompression)

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 Details

getEncoded

public byte[] getEncoded(boolean compressed)

return the field element encoded with point compression. (S 4.3.6)

Specified by:

getEncoded 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

subtract

public ECPoint subtract(ECPoint b)

Specified by:

subtract in class ECPoint

negate

public ECPoint negate()

Specified by:

negate in class ECPoint