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

Class EllipticCurve

java.lang.Object

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

Deprecated.

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

public class EllipticCurve
extends java.lang.Object

The EllipticCurve represents an elliptic curve.

Constructor Summary

Constructors

Constructor and Description
EllipticCurve(ASN1Object object, Field field) Deprecated. Instantiates an EllipticCurve object given an ASN1Object and a field as arguments.
EllipticCurve(FieldElement a, FieldElement b, java.math.BigInteger seed) Deprecated. Instantiates an EllipticCurve object given two field elements and a seed as arguments.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Deprecated. Compares two elliptic curves for equality.
FieldElement	getA() Deprecated. Returns the value of the coefficient a of the elliptic curve as defined in X9.62.
FieldElement	getB() Deprecated. Returns the value of the coefficient b of the elliptic curve as defined in X9.62.
Field	getField() Deprecated. Returns the field corresponding to the curve.
ECPoint	getPointOfInfinity() Deprecated. Returns the point at infinity.
java.math.BigInteger	getSeed() Deprecated. Returns the seed corresponding to this curve.
ASN1Object	toASN1Object() Deprecated. Returns the curve as an ASN1Object — defined in X9.62.
java.lang.String	toString() Deprecated. Returns the String representation of an elliptic curve.

Methods inherited from class java.lang.Object

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

Constructor Detail

EllipticCurve

public EllipticCurve(ASN1Object object,
                     Field field)
              throws java.lang.IllegalArgumentException

Deprecated.

Instantiates an EllipticCurve object given an ASN1Object and a field as arguments.

Parameters:

object - an ASN1Object object

Note

Precondition: must be of form specified in X9.62, and the parsed parameter must form a valid curve.

field - a Field object

Throws:

java.lang.IllegalArgumentException - ff the precondition is not satisfied.

EllipticCurve

public EllipticCurve(FieldElement a,
                     FieldElement b,
                     java.math.BigInteger seed)

Deprecated.

Instantiates an EllipticCurve object given two field elements and a seed as arguments.

Note

The constructor does not check if the precondition below has been met.

Parameters:

a - a FieldElement object

b - a FieldElement object

seed - a BigInteger object. This might be null,if there is no seed (that is, if the curve was not generated randomly using the curve generation algorithm given in X9.62.

Note

Precondition: the field elements correspond to a valid curve. The seed, if not null, must be generated using the curve generation algorithm given in X9.62.

Method Detail

toASN1Object

public ASN1Object toASN1Object()

Deprecated.

Returns the curve as an ASN1Object — defined in X9.62.

The ASN1Object is a SEQUENCE that has three components: the two field elements a and b as OCTET STRINGS, and the seed as a BIT STRING.

Returns:

the curve as an ASN1Object

getA

public FieldElement getA()

Deprecated.

Returns the value of the coefficient a of the elliptic curve as defined in X9.62.

Returns:

a FieldElement object representing a

getB

public FieldElement getB()

Deprecated.

Returns the value of the coefficient b of the elliptic curve as defined in X9.62.

Returns:

a FieldElement object representing b

getField

public Field getField()

Deprecated.

Returns the field corresponding to the curve.

Returns:

a Field object

getSeed

public java.math.BigInteger getSeed()

Deprecated.

Returns the seed corresponding to this curve.

If the seed was set as null in the constructor, the method returns null.

Returns:

the seed as BigInteger — can be null

getPointOfInfinity

public ECPoint getPointOfInfinity()

Deprecated.

Returns the point at infinity.

Returns:

the point at infinity as an ECPoint object

toString

public java.lang.String toString()

Deprecated.

Returns the String representation of an elliptic curve.

Overrides:

toString in class java.lang.Object

Returns:

the elliptic curve as a String

equals

public boolean equals(java.lang.Object obj)

Deprecated.

Compares two elliptic curves for equality.

Two elliptic curves are equal if their fields and their elements a and b are equal.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the reference elliptic curve with which to compare

Returns:

true if this elliptic curve is equal to the obj argument — false otherwise