iaik.security.ecc.math.ecgroup
Class Coordinate

java.lang.Object
  iaik.security.ecc.math.ecgroup.Coordinate

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

AffineCoordinate

public abstract class Coordinate

extends java.lang.Object

implements java.lang.Cloneable

The base class of all coordinates. It consists of x and y values (which are elements of a finite field).

Field Summary

protected int	coordinateType_ The type of coordinates used.
protected FieldElement	x_ the x coordinate
protected FieldElement	y_ the y coordinate

Constructor Summary

protected

Coordinate(FieldElement x, FieldElement y, int type) Used by subclasses.

Method Summary

java.lang.Object	clone()
abstract boolean	equals(java.lang.Object other)
int	getCoordinateType() Returns the coordinate id.
FieldElement	getX()
FieldElement	getY()
abstract int	hashCode() Returns the hash code of this value.
protected void	setX(FieldElement x)
protected void	setY(FieldElement y)
abstract Coordinate	toAffine() Transforms the current coordinate representation into affine coordinates.
abstract iaik.asn1.OCTET_STRING	toASN1Object() Elliptic Curve Points to Octet String Conversion Primitive or EC2OSP as defined in P1363.
java.lang.String	toString() A human readable coordinate representation.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

coordinateType_

protected int coordinateType_

The type of coordinates used.

x_

protected FieldElement x_

the x coordinate

y_

protected FieldElement y_

the y coordinate

Constructor Detail

Coordinate

protected Coordinate(FieldElement x,
                     FieldElement y,
                     int type)

Used by subclasses. The x and y coordinates are assigned.

Parameters:

x - the x coordinate

y - the y coordinate

type - the coordinate type.

See Also:

CoordinateTypes

Method Detail

clone

public java.lang.Object clone()

Returns:

a deep copy of this object.

equals

public abstract boolean equals(java.lang.Object other)

Parameters:

other - the other coordinate.

Returns:

true if all coordinates are equal.

getCoordinateType

public int getCoordinateType()

Returns the coordinate id.

Returns:

an integer defining the coordinate.

See Also:

CoordinateTypes

getX

public FieldElement getX()

Returns:

the x coordinate

getY

public FieldElement getY()

Returns:

the y coordinate

hashCode

public abstract int hashCode()

Returns the hash code of this value.

Returns:

the hash code of this value.

toAffine

public abstract Coordinate toAffine()

Transforms the current coordinate representation into affine coordinates. If the coordinates are already affine subclasses may simply return "this".

Returns:

the affine representation.

toASN1Object

public abstract iaik.asn1.OCTET_STRING toASN1Object()

Elliptic Curve Points to Octet String Conversion Primitive or EC2OSP as defined in P1363.

Returns:

the octet string ASN.1 structure

toString

public java.lang.String toString()

A human readable coordinate representation.

Returns:

all coordinates

setX

protected void setX(FieldElement x)

Parameters:

x - the x coordinate

setY

protected void setY(FieldElement y)

Parameters:

y - the y coordinate