001/*
002 * nimbus-jose-jwt
003 *
004 * Copyright 2012-2016, Connect2id Ltd and contributors.
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use
007 * this file except in compliance with the License. You may obtain a copy of the
008 * License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software distributed
013 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
014 * CONDITIONS OF ANY KIND, either express or implied. See the License for the
015 * specific language governing permissions and limitations under the License.
016 */
017
018package com.nimbusds.jose.crypto.impl;
019
020
021import com.nimbusds.jose.JWSAlgorithm;
022import com.nimbusds.jose.jwk.Curve;
023
024import java.util.Arrays;
025import java.util.Collections;
026import java.util.HashSet;
027import java.util.Set;
028
029
030/**
031 * The base abstract class for Edwards-curve Digital Signature Algorithm 
032 * (EdDSA) signers and validators of {@link com.nimbusds.jose.JWSObject JWS 
033 * objects}.
034 *
035 * <p>Supports the following algorithm:
036 *
037 * <ul>
038 *     <li>{@link com.nimbusds.jose.JWSAlgorithm#Ed25519}
039 *     <li>{@link com.nimbusds.jose.JWSAlgorithm#EdDSA} with
040 *         {@link com.nimbusds.jose.jwk.Curve#Ed25519}
041 * </ul>
042 * 
043 * @author Tim McLean
044 * @version 2024-05-07
045 */
046public abstract class EdDSAProvider extends BaseJWSProvider {
047
048
049        /**
050         * The supported JWS algorithms by the EdDSA provider class.
051         */
052        public static final Set<JWSAlgorithm> SUPPORTED_ALGORITHMS;
053
054
055        /**
056         * The supported curves by the EdDSA provider class.
057         */
058        public static final Set<Curve> SUPPORTED_CURVES;
059
060
061        static {
062                SUPPORTED_ALGORITHMS = Collections.unmodifiableSet(
063                        new HashSet<>(
064                                Arrays.asList(
065                                        JWSAlgorithm.EdDSA,
066                                        JWSAlgorithm.Ed25519
067                                )
068                        ));
069
070                SUPPORTED_CURVES = Collections.singleton(Curve.Ed25519);
071        }
072
073
074        /**
075         * Creates a new Edwards-curve Digital Signature Algorithm (EdDSA) 
076         * provider.
077         */
078        protected EdDSAProvider() {
079
080                super(SUPPORTED_ALGORITHMS);
081        }
082}
083