Class EcdsaPublicKeyBuilder

java.lang.Object

zeroecho.core.alg.ecdsa.EcdsaPublicKeyBuilder

All Implemented Interfaces:

PublicKeyImporter<EcdsaPublicKeySpec>

public final class EcdsaPublicKeyBuilder
extends Object
implements PublicKeyImporter<EcdsaPublicKeySpec>

ECDSA Public Key Builder

Implementation of PublicKeyImporter for EcdsaPublicKeySpec. This builder is responsible for importing ECDSA public keys from X.509 SubjectPublicKeyInfo encodings.

The exact supported operation is importPublic(EcdsaPublicKeySpec). Generation and private import are registered through their own operation-specific implementations.

Encoding

The EcdsaPublicKeySpec stores the public key in standard X.509 DER format. This builder delegates to a JCA KeyFactory for the "EC" algorithm to reconstruct a usable PublicKey.

Usage

Typically accessed through the session key-operation API or CryptoAlgorithm.publicKeyImporter(Class).

// Example: Import an ECDSA public key
byte[] x509 = ...; // load SubjectPublicKeyInfo DER data
EcdsaPublicKeySpec spec = new EcdsaPublicKeySpec(x509);
PublicKey pub = new EcdsaPublicKeyBuilder().importPublic(spec);

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
EcdsaPublicKeyBuilder()	Creates a stateless X.509 EC public-key importer.

Method Summary

Modifier and Type	Method	Description
PublicKey	importPublic(EcdsaPublicKeySpec spec)	Imports a public key from an X.509 SubjectPublicKeyInfo specification.

Methods inherited from class Object

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

Constructor Details

EcdsaPublicKeyBuilder

public EcdsaPublicKeyBuilder()

Creates a stateless X.509 EC public-key importer.

Method Details

importPublic

public PublicKey importPublic(EcdsaPublicKeySpec spec)
                       throws GeneralSecurityException

Imports a public key from an X.509 SubjectPublicKeyInfo specification.

Uses a JCA KeyFactory instance for "EC" to parse the given EcdsaPublicKeySpec and construct a PublicKey.

Specified by:

importPublic in interface PublicKeyImporter<EcdsaPublicKeySpec>

Parameters:

spec - public key specification containing X.509 DER encoding

Returns:

reconstructed PublicKey instance

Throws:

GeneralSecurityException - if the encoding is invalid or the key cannot be reconstructed