001/*
002 * Copyright 2018 Paul Schaub.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.pgpainless.algorithm;
017
018import java.util.HashMap;
019import java.util.Map;
020
021import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
022
023public enum PublicKeyAlgorithm {
024
025    RSA_GENERAL     (PublicKeyAlgorithmTags.RSA_GENERAL),
026    RSA_ENCRYPT     (PublicKeyAlgorithmTags.RSA_ENCRYPT),
027    RSA_SIGN        (PublicKeyAlgorithmTags.RSA_SIGN),
028    ELGAMAL_ENCRYPT (PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT),
029    DSA             (PublicKeyAlgorithmTags.DSA),
030    /**
031     * EC is deprecated.
032     * @deprecated use {@link #ECDH} instead.
033     */
034    EC              (PublicKeyAlgorithmTags.EC),
035    ECDH            (PublicKeyAlgorithmTags.ECDH),
036    ECDSA           (PublicKeyAlgorithmTags.ECDSA),
037    ELGAMAL_GENERAL (PublicKeyAlgorithmTags.ELGAMAL_GENERAL),
038    DIFFIE_HELLMAN  (PublicKeyAlgorithmTags.DIFFIE_HELLMAN),
039    ;
040
041    private static final Map<Integer, PublicKeyAlgorithm> MAP = new HashMap<>();
042
043    static {
044        for (PublicKeyAlgorithm p : PublicKeyAlgorithm.values()) {
045            MAP.put(p.algorithmId, p);
046        }
047    }
048
049    public static PublicKeyAlgorithm fromId(int id) {
050        return MAP.get(id);
051    }
052
053    private final int algorithmId;
054
055    PublicKeyAlgorithm(int algorithmId) {
056        this.algorithmId = algorithmId;
057    }
058
059    public int getAlgorithmId() {
060        return algorithmId;
061    }
062}