Package org.bouncycastle.jcajce.provider.asymmetric.compositekem

Class KeyFactorySpi

java.lang.Object

java.security.KeyFactorySpi

org.bouncycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi

org.bouncycastle.jcajce.provider.asymmetric.compositekem.KeyFactorySpi

All Implemented Interfaces:

AsymmetricKeyInfoConverter

public class KeyFactorySpi
extends BaseKeyFactorySpi
implements AsymmetricKeyInfoConverter

KeyFactory for Composite ML-KEM keys as defined in Composite ML-KEM for use in X.509 Public Key Infrastructure. The supported parameter sets are registered in CompositeIndex.

Constructor Summary

Constructors

Constructor	Description
KeyFactorySpi()
KeyFactorySpi(JcaJceHelper helper)

Method Summary

Modifier and Type	Method	Description
protected java.security.Key	engineTranslateKey(java.security.Key key)
java.security.PrivateKey	generatePrivate(PrivateKeyInfo keyInfo)	Creates a CompositePrivateKey from its PrivateKeyInfo encoded form.
java.security.PublicKey	generatePublic(SubjectPublicKeyInfo keyInfo)	Creates a CompositePublicKey from its SubjectPublicKeyInfo encoded form.

Methods inherited from class org.bouncycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi

engineGeneratePrivate, engineGeneratePublic, engineGetKeySpec

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyFactorySpi

public KeyFactorySpi()

KeyFactorySpi

public KeyFactorySpi(JcaJceHelper helper)

Method Detail

engineTranslateKey

protected java.security.Key engineTranslateKey(java.security.Key key)
                                        throws java.security.InvalidKeyException

Specified by:

engineTranslateKey in class java.security.KeyFactorySpi

Throws:

java.security.InvalidKeyException

generatePrivate

public java.security.PrivateKey generatePrivate(PrivateKeyInfo keyInfo)
                                         throws java.io.IOException

Creates a CompositePrivateKey from its PrivateKeyInfo encoded form. Per draft-ietf-lamps-pq-composite-kem the private key body is the 64-byte ML-KEM seed concatenated with the traditional private key encoding; the two components are split and decoded with their respective component key factories.

Specified by:

generatePrivate in interface AsymmetricKeyInfoConverter

Parameters:

keyInfo - PrivateKeyInfo whose key body is the concatenation of the two component keys.

Returns:

A CompositePrivateKey holding both component private keys.

Throws:

java.io.IOException - on a malformed encoding.

generatePublic

public java.security.PublicKey generatePublic(SubjectPublicKeyInfo keyInfo)
                                       throws java.io.IOException

Creates a CompositePublicKey from its SubjectPublicKeyInfo encoded form. Per draft-ietf-lamps-pq-composite-kem the public key is the concatenation of the two raw component public keys; it is split at the fixed ML-KEM public key size and each component is decoded with its key factory.

Specified by:

generatePublic in interface AsymmetricKeyInfoConverter

Parameters:

keyInfo - SubjectPublicKeyInfo whose key body is the concatenation of the two component public keys.

Returns:

A CompositePublicKey holding both component public keys.

Throws:

java.io.IOException - on a malformed encoding.