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

Class ECPointFactory

java.lang.Object

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

Deprecated.

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

public class ECPointFactory
extends java.lang.Object

The ECPointFactory class contains methods to retrieve an instance of the ECPoint abstract class.

Constructor Summary

Constructors

Constructor and Description
ECPointFactory() Deprecated.

Method Summary

Modifier and Type	Method and Description
static ECPoint	getInstance(ASN1Object object, EllipticCurve curve) Deprecated. Parses an ASN.1 object to return an instance of ECPoint.
static ECPoint	getInstance(EllipticCurve curve) Deprecated. Returns the point at infinity corresponding to the given curve.
static ECPoint	getInstance(FieldElement x, FieldElement y, EllipticCurve curve) Deprecated. Returns an instance of the ECPoint class given two field elements and an elliptic curve as arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

ECPointFactory

public ECPointFactory()

Deprecated.

Method Detail

getInstance

public static ECPoint getInstance(FieldElement x,
                                  FieldElement y,
                                  EllipticCurve curve)
                           throws java.lang.IllegalArgumentException

Deprecated.

Returns an instance of the ECPoint class given two field elements and an elliptic curve as arguments.

Parameters:

x - a FieldElement object

y - a FieldElement object

curve - an EllipticCurve object

Note

Precondition: all arguments must be members of the same field. The field elements must correspond to a valid point on the elliptic curve.

Returns:

an ECPoint object

Throws:

java.lang.IllegalArgumentException - if the field type is neither GFp nor PolynomialField

getInstance

public static ECPoint getInstance(EllipticCurve curve)

Deprecated.

Returns the point at infinity corresponding to the given curve.

Parameters:

curve - an EllipticCurve object

Returns:

an ECPoint object that represents the point at infinity

Throws:

java.lang.IllegalArgumentException - if the field type is neither GFp nor PolynomialField

getInstance

public static ECPoint getInstance(ASN1Object object,
                                  EllipticCurve curve)
                           throws CodingException,
                                  java.lang.IllegalArgumentException

Deprecated.

Parses an ASN.1 object to return an instance of ECPoint.

The method uses the algorithm specified in section 4.3.6 of the X9.62 specification to parse the ASN.1 object.

Parameters:

object - an ASN1Object object

curve - an EllipticCurve object

Returns:

an ECPoint object.

Throws:

CodingException - if the ASN1Object is illformed, or if the ECPoint is compressed

java.lang.IllegalArgumentException - if the parsed point form the ASN1Object is invalid on the given curve, or if the parsed order is incorrect