kz.gamma.hardware.crypto.software.ec
Class ECPoint.F2m

java.lang.Object
  kz.gamma.hardware.crypto.software.ec.ECPoint
      kz.gamma.hardware.crypto.software.ec.ECPoint.F2m

Enclosing class:

ECPoint

public static class ECPoint.F2m
extends ECPoint

Elliptic curve points over F2m

Nested Class Summary

Nested classes/interfaces inherited from class kz.gamma.hardware.crypto.software.ec.ECPoint

ECPoint.F2m, ECPoint.Fp

Field Summary

Fields inherited from class kz.gamma.hardware.crypto.software.ec.ECPoint

curve, multiplier, preCompInfo, withCompression, x, y

Constructor Summary

ECPoint.F2m(ECCurve curve)
Deprecated. use ECCurve.getInfinity() Constructor for point at infinity

ECPoint.F2m(ECCurve curve, ECFieldElement x, ECFieldElement y)

ECPoint.F2m(ECCurve curve, ECFieldElement x, ECFieldElement y, boolean withCompression)

Method Summary

ECPoint	add(ECPoint b)
ECPoint.F2m	addSimple(ECPoint.F2m b) Adds another ECPoints.F2m to this without checking if both points are on the same curve.
private static void	checkPoints(ECPoint a, ECPoint b) Check, if two ECPoints can be added or subtracted.
byte[]	getEncoded()
ECPoint	negate()
ECPoint	subtract(ECPoint b)
ECPoint.F2m	subtractSimple(ECPoint.F2m b) Subtracts another ECPoints.F2m from this without checking if both points are on the same curve.
ECPoint	twice()

Methods inherited from class kz.gamma.hardware.crypto.software.ec.ECPoint

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ECPoint.F2m

public ECPoint.F2m(ECCurve curve,
                   ECFieldElement x,
                   ECFieldElement y)

Parameters:

curve - base curve

x - x point

y - y point

ECPoint.F2m

public ECPoint.F2m(ECCurve curve,
                   ECFieldElement x,
                   ECFieldElement y,
                   boolean withCompression)

Parameters:

curve - base curve

x - x point

y - y point

withCompression - true if encode with point compression.

ECPoint.F2m

public ECPoint.F2m(ECCurve curve)

Deprecated. use ECCurve.getInfinity() Constructor for point at infinity

Method Detail

getEncoded

public byte[] getEncoded()

Specified by:

getEncoded in class ECPoint

checkPoints

private static void checkPoints(ECPoint a,
                                ECPoint b)

Check, if two ECPoints can be added or subtracted.

Parameters:

a - The first ECPoint to check.

b - The second ECPoint to check.

Throws:

java.lang.IllegalArgumentException - if a and b cannot be added.

add

public ECPoint add(ECPoint b)

Specified by:

add in class ECPoint

addSimple

public ECPoint.F2m addSimple(ECPoint.F2m b)

Adds another ECPoints.F2m to this without checking if both points are on the same curve. Used by multiplication algorithms, because there all points are a multiple of the same point and hence the checks can be omitted.

Parameters:

b - The other ECPoints.F2m to add to this.

Returns:

this + b

subtract

public ECPoint subtract(ECPoint b)

Specified by:

subtract in class ECPoint

subtractSimple

public ECPoint.F2m subtractSimple(ECPoint.F2m b)

Subtracts another ECPoints.F2m from this without checking if both points are on the same curve. Used by multiplication algorithms, because there all points are a multiple of the same point and hence the checks can be omitted.

Parameters:

b - The other ECPoints.F2m to subtract from this.

Returns:

this - b

twice

public ECPoint twice()

Specified by:

twice in class ECPoint

negate

public ECPoint negate()

Specified by:

negate in class ECPoint