Package org.opensaml.security.crypto.ec.curves

Class AbstractNamedCurve

java.lang.Object

net.shibboleth.utilities.java.support.component.AbstractInitializableComponent

org.opensaml.security.crypto.ec.curves.AbstractNamedCurve

All Implemented Interfaces:

Component, DestructableComponent, InitializableComponent, NamedCurve

Direct Known Subclasses:

BrainpoolP256r1, BrainpoolP320r1, BrainpoolP384r1, BrainpoolP512r1, Secp112r1, Secp112r2, Secp128r1, Secp128r2, Secp160k1, Secp160r1, Secp160r2, Secp192k1, Secp192r1, Secp224k1, Secp224r1, Secp256k1, Secp256r1, Secp384r1, Secp521r1, Sect113r1, Sect113r2, Sect131r1, Sect131r2, Sect163k1, Sect163r1, Sect163r2, Sect193r1, Sect193r2, Sect233k1, Sect233r1, Sect239k1, Sect283k1, Sect283r1, Sect409k1, Sect409r1, Sect571k1, Sect571r1, X962c2tnb191v1, X962c2tnb191v2, X962c2tnb191v3, X962c2tnb239v1, X962c2tnb239v2, X962c2tnb239v3, X962c2tnb359v1, X962c2tnb431r1, X962prime192v2, X962prime192v3, X962prime239v1, X962prime239v2, X962prime239v3

public abstract class AbstractNamedCurve
extends AbstractInitializableComponent
implements NamedCurve

Abstract base class for implementations of NamedCurve.

Field Summary

Fields

Modifier and Type	Field	Description
private final org.slf4j.Logger	log	Logger.
private ECParameterSpec	paramSpec	Instance of ECParameterSpec corresponding to the curve.

Constructor Summary

Constructors

Constructor	Description
AbstractNamedCurve()

Method Summary

Modifier and Type	Method	Description
protected ECParameterSpec	buildParameterSpec()	Build an instance of ECParameterSpec corresponding to this curve.
protected void	doInitialize()
ECParameterSpec	getParameterSpec()	Get the curve's ECParameterSpec.
String	toString()

Methods inherited from class net.shibboleth.utilities.java.support.component.AbstractInitializableComponent

destroy, doDestroy, initialize, isDestroyed, isInitialized

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.opensaml.security.crypto.ec.NamedCurve

getKeyLength, getName, getObjectIdentifier, getURI

Field Details

log

private final org.slf4j.Logger log

Logger.

paramSpec

@NonnullAfterInit
private ECParameterSpec paramSpec

Instance of ECParameterSpec corresponding to the curve.

Constructor Details

AbstractNamedCurve

public AbstractNamedCurve()

Method Details

getParameterSpec

@NonnullAfterInit
public ECParameterSpec getParameterSpec()

Get the curve's ECParameterSpec.

Specified by:

getParameterSpec in interface NamedCurve

Returns:

the parameter spec instance

doInitialize

protected void doInitialize()
                     throws ComponentInitializationException

Overrides:

doInitialize in class AbstractInitializableComponent

Throws:

ComponentInitializationException

buildParameterSpec

@Nullable
protected ECParameterSpec buildParameterSpec()

Build an instance of ECParameterSpec corresponding to this curve.

The default implementation here is that it first attempts to resolve the curve from Bouncy Castle's ECNamedCurveTable. If that is unsuccessful then it attempts a brute force approach by generating a key pair using a ECGenParameterSpec based on the curve's name from NamedCurve.getName(), returning the parameter instance from the resulting ECPublicKey.

Returns:

the parameter spec instance, or null if can not be built

toString

public String toString()

Overrides:

toString in class Object