ECParameterSpec (Java Platform SE 6)

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Java™ Platform
Standard Ed. 6

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java.security.spec
Class ECParameterSpec

java.lang.Object
 extended by java.security.spec.ECParameterSpec

All Implemented Interfaces:: AlgorithmParameterSpec

public class ECParameterSpec
extends Object
implements AlgorithmParameterSpec
extends Object
implements AlgorithmParameterSpec

This immutable class specifies the set of domain parameters used with elliptic curve cryptography (ECC).

Since:: 1.5
See Also:: AlgorithmParameterSpec

Constructor Summary
`ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)` Creates elliptic curve domain parameters based on the specified values.

Method Summary
`int`	`getCofactor()` Returns the cofactor.
`EllipticCurve`	`getCurve()` Returns the elliptic curve that this parameter defines.
`ECPoint`	`getGenerator()` Returns the generator which is also known as the base point.
`BigInteger`	`getOrder()` Returns the order of the generator.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

ECParameterSpec

public ECParameterSpec(EllipticCurve curve,
 ECPoint g,
 BigInteger n,
 int h)

Creates elliptic curve domain parameters based on the specified values.

Parameters:: curve - the elliptic curve which this parameter defines.; g - the generator which is also known as the base point.; n - the order of the generator g.; h - the cofactor.
Throws:: NullPointerException - if curve, g, or n is null.; IllegalArgumentException - if n or h is not positive.

Method Detail

getCurve

public EllipticCurve getCurve()

Returns the elliptic curve that this parameter defines.

Returns:: the elliptic curve that this parameter defines.

getGenerator

public ECPoint getGenerator()

Returns the generator which is also known as the base point.

Returns:: the generator which is also known as the base point.

getOrder

public BigInteger getOrder()

Returns the order of the generator.

Returns:: the order of the generator.

getCofactor

public int getCofactor()

Returns the cofactor.

Returns:: the cofactor.