org.gudy.bouncycastle.math.ec
Class ECPoint.Fp

java.lang.Object
  org.gudy.bouncycastle.math.ec.ECPoint
      org.gudy.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.gudy.bouncycastle.math.ec.ECPoint

ECPoint.F2m, ECPoint.Fp

Field Summary

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

multiplier, preCompInfo, withCompression

Constructor Summary

ECPoint.Fp(ECCurve curve, ECFieldElement x, ECFieldElement y)
Create a point which encodes with point compression.

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

Method Summary

ECPoint	add(ECPoint b)
byte[]	getEncoded() return the field element encoded with point compression.
ECPoint	negate()
ECPoint	subtract(ECPoint b)
ECPoint	twice()

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ECPoint.Fp

public ECPoint.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

ECPoint.Fp

public ECPoint.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 Detail

getEncoded

public byte[] getEncoded()

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