java.security.spec

Class EllipticCurve

java.lang.Object

java.security.spec.EllipticCurve

public class EllipticCurve
extends Object

An Elliptic Curve with its necessary values.

Constructor Summary

Constructors

Constructor and Description
EllipticCurve(ECField field, BigInteger a, BigInteger b) Creates a new EllipticCurve with the specified field and coefficients.
EllipticCurve(ECField field, BigInteger a, BigInteger b, byte[] seed) Creates a new EllipticCurve with the specified field, coefficients and seed.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Returns whether the specified object equals to this elliptic curve.
BigInteger	getA() Returns the coefficient a of this elliptic curve.
BigInteger	getB() Returns the coefficient b of this elliptic curve.
ECField	getField() Returns the finite field of this elliptic curve.
byte[]	getSeed() Returns a copy of the seed that was used to generate this elliptic curve.
int	hashCode() Returns the hashcode of this elliptic curve.

Methods inherited from class java.lang.Object

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

Constructor Detail

EllipticCurve

public EllipticCurve(ECField field,
                     BigInteger a,
                     BigInteger b,
                     byte[] seed)

Creates a new EllipticCurve with the specified field, coefficients and seed.

Parameters:

field - the finite field of this elliptic curve.

a - the coefficient a.

b - the coefficient b.

seed - the seed used for the generation of the curve.

Throws:

IllegalArgumentException - if the specified coefficients are not in the specified field.

EllipticCurve

public EllipticCurve(ECField field,
                     BigInteger a,
                     BigInteger b)

Creates a new EllipticCurve with the specified field and coefficients.

Parameters:

field - the finite field of this elliptic curve.

a - the coefficient a.

b - the coefficient b.

Throws:

IllegalArgumentException - if the specified coefficients are not in the specified field.

Method Detail

getA

public BigInteger getA()

Returns the coefficient a of this elliptic curve.

Returns:

the coefficient a of this elliptic curve.

getB

public BigInteger getB()

Returns the coefficient b of this elliptic curve.

Returns:

the coefficient b of this elliptic curve.

getField

public ECField getField()

Returns the finite field of this elliptic curve.

Returns:

the finite field of this elliptic curve.

getSeed

public byte[] getSeed()

Returns a copy of the seed that was used to generate this elliptic curve.

Returns:

a copy of the seed that was used to generate this elliptic curve, or null if none specified.

equals

public boolean equals(Object other)

Returns whether the specified object equals to this elliptic curve.

Overrides:

equals in class Object

Parameters:

other - the object to compare.

Returns:

true if the specified object is equal to this elliptic curve, otherwise false.

See Also:

Object.hashCode()

hashCode

public int hashCode()

Returns the hashcode of this elliptic curve.

Overrides:

hashCode in class Object

Returns:

the hashcode of this elliptic curve.

See Also:

Object.equals(java.lang.Object)