001/*
002 * oauth2-oidc-sdk
003 *
004 * Copyright 2012-2021, 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.openid.connect.sdk.assurance.evidences.attachment;
019
020
021import net.jcip.annotations.Immutable;
022
023import com.nimbusds.oauth2.sdk.id.Identifier;
024
025
026/**
027 * Hash algorithm.
028 *
029 * <p>Related specifications:
030 *
031 * <ul>
032 *     <li>OpenID Connect for Identity Assurance 1.0, section 5.1.2.2.
033 *     <li>IANA Named Information Hash Algorithm Registry
034 * </ul>
035 */
036@Immutable
037public final class HashAlgorithm extends Identifier {
038        
039        
040        private static final long serialVersionUID = -3699666147154820591L;
041        
042        
043        /**
044         * SHA-256.
045         */
046        public static final HashAlgorithm SHA_256 = new HashAlgorithm("sha-256");
047        
048        
049        /**
050         * SHA-384.
051         */
052        public static final HashAlgorithm SHA_384 = new HashAlgorithm("sha-384");
053        
054        
055        /**
056         * SHA-512.
057         */
058        public static final HashAlgorithm SHA_512 = new HashAlgorithm("sha-512");
059        
060        
061        /**
062         * Creates a new hash algorithm with the specified name, normalised to
063         * lowercase.
064         *
065         * @param name The name. Must not be {@code null}.
066         */
067        public HashAlgorithm(final String name) {
068                super(name.toLowerCase());
069        }
070        
071        
072        @Override
073        public boolean equals(final Object object) {
074                
075                return object instanceof HashAlgorithm &&
076                        this.toString().equals(object.toString());
077        }
078}