com.entrust.toolkit.security.arithmetic.groups.ellipticCurve

Class ECPoint

java.lang.Object

com.entrust.toolkit.security.arithmetic.groups.ellipticCurve.ECPoint

Direct Known Subclasses:

ECPointGFp, PolynomeECPoint

Deprecated.

since 8.0; use Entrust's new EC architecture com.entrust.toolkit.security.crypto.ec instead

public abstract class ECPoint
extends java.lang.Object

The abstract ECPoint class is a means of representing an point on a elliptic curve.

The class contains one non-abstract method for (scalar) multiplication on a elliptic curve — a common operation on curves over different field types.

Constructor Summary

Constructors

Constructor and Description
ECPoint() Deprecated.

Method Summary

Modifier and Type	Method and Description
abstract ECPoint	add(ECPoint point) Deprecated. Returns the sum of this point and the given point on the curve.
abstract ECPoint	doublePoint() Deprecated. Returns the double point (two times the calling point) on the curve.
abstract boolean	equals(java.lang.Object object) Deprecated. Determines whether the object argument equals the calling point.
abstract EllipticCurve	getCurve() Deprecated. Returns the curve linked to the calling point.
abstract FieldElement	getXCoordinate() Deprecated. Returns the x-coordinate of the calling point.
abstract FieldElement	getYCoordinate() Deprecated. Returns the y-coordinate of the calling point.
abstract boolean	isPointAtInfinity() Deprecated. Determines whether or not the calling point is the point at infinity.
ECPoint	multiply(java.math.BigInteger a) Deprecated. Returns the scalar product of the calling point and the given number on the curve.
abstract ASN1Object	toASN1Object() Deprecated. Returns the curve point as an instance of ASN1Object.
abstract java.lang.String	toString() Deprecated. Returns the String representation of the calling point.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ECPoint

public ECPoint()

Deprecated.

Method Detail

toASN1Object

public abstract ASN1Object toASN1Object()

Deprecated.

Returns the curve point as an instance of ASN1Object.

Returns:

the curve as an instance of ASN1Object

add

public abstract ECPoint add(ECPoint point)

Deprecated.

Returns the sum of this point and the given point on the curve.

Returns:

the sume of the points

doublePoint

public abstract ECPoint doublePoint()

Deprecated.

Returns the double point (two times the calling point) on the curve.

Returns:

the double of the calling point

multiply

public ECPoint multiply(java.math.BigInteger a)
                 throws java.lang.IllegalArgumentException

Deprecated.

Returns the scalar product of the calling point and the given number on the curve.

Parameters:

a - a BigInteger

Note

Precondition: the value of number must be positive or 0.

Returns:

the product of the calling point and the given number.

Throws:

java.lang.IllegalArgumentException - if number is negative.

isPointAtInfinity

public abstract boolean isPointAtInfinity()

Deprecated.

Determines whether or not the calling point is the point at infinity.

Returns:

true if the calling point is the point at infinity — false otherwise

getCurve

public abstract EllipticCurve getCurve()

Deprecated.

Returns the curve linked to the calling point.

Returns:

the curve as an instance of EllipticCurve

getXCoordinate

public abstract FieldElement getXCoordinate()

Deprecated.

Returns the x-coordinate of the calling point.

Returns:

the x-coordinate as a FieldElement object.

getYCoordinate

public abstract FieldElement getYCoordinate()

Deprecated.

Returns the y-coordinate of the calling point.

Returns:

the y-coordinate as a FieldElement object.

equals

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

Deprecated.

Determines whether the object argument equals the calling point.

Overrides:

equals in class java.lang.Object

Returns:

true if both point are equal — false otherwise

toString

public abstract java.lang.String toString()

Deprecated.

Returns the String representation of the calling point.

Overrides:

toString in class java.lang.Object

Returns:

a String representing the calling point