001// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
002//
003// SPDX-License-Identifier: Apache-2.0
004
005package org.pgpainless.key.generation.type.elgamal;
006
007import java.security.spec.AlgorithmParameterSpec;
008import javax.annotation.Nonnull;
009
010import org.bouncycastle.jce.spec.ElGamalParameterSpec;
011import org.pgpainless.algorithm.PublicKeyAlgorithm;
012import org.pgpainless.key.generation.type.KeyType;
013
014/**
015 * ElGamal encryption only key type.
016 */
017public final class ElGamal implements KeyType {
018
019    private final ElGamalLength length;
020
021    private ElGamal(@Nonnull ElGamalLength length) {
022        this.length = length;
023    }
024
025    public static ElGamal withLength(ElGamalLength length) {
026        return new ElGamal(length);
027    }
028
029    @Override
030    public String getName() {
031        return "ElGamal";
032    }
033
034    @Override
035    public PublicKeyAlgorithm getAlgorithm() {
036        return PublicKeyAlgorithm.ELGAMAL_ENCRYPT;
037    }
038
039    @Override
040    public int getBitStrength() {
041        return length.getLength();
042    }
043
044    @Override
045    public AlgorithmParameterSpec getAlgorithmSpec() {
046        return new ElGamalParameterSpec(length.getP(), length.getG());
047    }
048
049}