Package org.bouncycastle.jcajce.provider.asymmetric.compositesignatures

Class KeyFactorySpi

java.lang.Object

java.security.KeyFactorySpi

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

org.bouncycastle.jcajce.provider.asymmetric.compositesignatures.KeyFactorySpi

All Implemented Interfaces:

AsymmetricKeyInfoConverter

public class KeyFactorySpi
extends BaseKeyFactorySpi
implements AsymmetricKeyInfoConverter

KeyFactory for composite signatures. The supported combinations are listed 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.

For the current OIDs (draft-ietf-lamps-pq-composite-sigs, IANA arc 1.3.6.1.5.5.7.6.37-54) the privateKey body is the bare concatenation mldsaSeed || tradSK, with no inner ASN.1 structure. The superseded Entrust/OpenCA OIDs, whose body is a SEQUENCE of OneAsymmetricKey (the newer name for PrivateKeyInfo), are still decoded for compatibility.

Specified by:

generatePrivate in interface AsymmetricKeyInfoConverter

Parameters:

keyInfo - PrivateKeyInfo carrying the composite private key body.

Returns:

A CompositePrivateKey created from all components in the body.

Throws:

java.io.IOException

generatePublic

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

Creates a CompositePublicKey from its SubjectPublicKeyInfo encoded form.

For the current OIDs (draft-ietf-lamps-pq-composite-sigs, IANA arc 1.3.6.1.5.5.7.6.37-54) the subjectPublicKey BIT STRING holds the bare concatenation mldsaPK || tradPK, split at the fixed ML-DSA public key length. The superseded encodings - a SEQUENCE of SubjectPublicKeyInfo, or of BIT STRINGs - are still decoded for compatibility, which is why the sequence parse is attempted first and the fixed-length split is reached from its catch branch.

Specified by:

generatePublic in interface AsymmetricKeyInfoConverter

Parameters:

keyInfo - SubjectPublicKeyInfo carrying the composite public key body.

Returns:

A CompositePublicKey created from all components in the body.

Throws:

java.io.IOException