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 java.util.Collections;
022import java.util.Set;
023
024import com.nimbusds.jose.JWSAlgorithm;
025import com.nimbusds.jose.JWSProvider;
026import com.nimbusds.jose.jca.JCAContext;
027
028
029/**
030 * The base abstract class for JSON Web Signature (JWS) signers and verifiers.
031 *
032 * @author Vladimir Dzhuvinov
033 * @version 2015-11-16
034 */
035public abstract class BaseJWSProvider implements JWSProvider {
036
037
038        /**
039         * The supported algorithms by the JWS provider instance.
040         */
041        private final Set<JWSAlgorithm> algs;
042
043
044        /**
045         * The JCA context.
046         */
047        private final JCAContext jcaContext = new JCAContext();
048
049
050        /**
051         * Creates a new base JWS provider.
052         *
053         * @param algs The supported algorithms by the JWS provider instance.
054         *             Must not be {@code null}.
055         */
056        public BaseJWSProvider(final Set<JWSAlgorithm> algs) {
057
058                if (algs == null) {
059                        throw new IllegalArgumentException("The supported JWS algorithm set must not be null");
060                }
061
062                this.algs = Collections.unmodifiableSet(algs);
063        }
064
065
066        @Override
067        public Set<JWSAlgorithm> supportedJWSAlgorithms() {
068
069                return algs;
070        }
071
072
073        @Override
074        public JCAContext getJCAContext() {
075
076                return jcaContext;
077        }
078}
079