Class SphincsPlusPublicKeyBuilder

java.lang.Object

zeroecho.core.alg.sphincsplus.SphincsPlusPublicKeyBuilder

All Implemented Interfaces:

PublicKeyImporter<SphincsPlusPublicKeySpec>

public final class SphincsPlusPublicKeyBuilder
extends Object
implements PublicKeyImporter<SphincsPlusPublicKeySpec>

Builder for importing SPHINCS+ public keys from encoded specifications.

SphincsPlusPublicKeyBuilder integrates with the JCA KeyFactory to parse X.509-encoded SPHINCS+ public keys. Unlike SphincsPlusKeyGenBuilder, this builder does not generate new key pairs, but focuses solely on importing public key material.

The exact supported operation is importPublic(SphincsPlusPublicKeySpec). Other key operations are registered through their own exact interfaces.

Example

// Assuming bytes contain an X.509-encoded SPHINCS+ public key:
SphincsPlusPublicKeySpec spec =
    new SphincsPlusPublicKeySpec(encodedBytes, "BC");

PublicKey pub =
    new SphincsPlusPublicKeyBuilder().importPublic(spec);

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
SphincsPlusPublicKeyBuilder()	Creates a stateless SPHINCS+ public-key importer.

Method Summary

Modifier and Type	Method	Description
PublicKey	importPublic(SphincsPlusPublicKeySpec spec)	Imports a SPHINCS+ public key from X.509 encoding.

Methods inherited from class Object

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

Constructor Details

SphincsPlusPublicKeyBuilder

public SphincsPlusPublicKeyBuilder()

Creates a stateless SPHINCS+ public-key importer.

Method Details

importPublic

public PublicKey importPublic(SphincsPlusPublicKeySpec spec)
                       throws GeneralSecurityException

Imports a SPHINCS+ public key from X.509 encoding.

The method uses KeyFactory with algorithm "SLH-DSA" and the provider specified in the spec. If no provider name is given, the default provider resolution is used.

Specified by:

importPublic in interface PublicKeyImporter<SphincsPlusPublicKeySpec>

Parameters:

spec - public key specification containing X.509-encoded key material and optional provider name

Returns:

the imported SPHINCS+ PublicKey

Throws:

NullPointerException - if spec or its encoded bytes are null

GeneralSecurityException - if the key factory cannot be initialized or the encoded key is invalid