001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.shiro.crypto.hash;
020
021import org.apache.shiro.lang.codec.Base64;
022import org.apache.shiro.lang.codec.Hex;
023
024/**
025 * Generates an SHA-512 Hash from a given input <tt>source</tt> with an optional <tt>salt</tt> and hash iterations.
026 * <p/>
027 * See the {@link SimpleHash SimpleHash} parent class JavaDoc for a detailed explanation of Hashing
028 * techniques and how the overloaded constructors function.
029 * <p/>
030 * <b>JDK Version Note</b> - Attempting to instantiate this class on JREs prior to version 1.4.0 will throw
031 * an {@link IllegalStateException IllegalStateException}
032 *
033 * @since 0.9
034 */
035public class Sha512Hash extends SimpleHash {
036
037    /**
038     * Sha512 algorithm name.
039     */
040    public static final String ALGORITHM_NAME = "SHA-512";
041
042    public Sha512Hash() {
043        super(ALGORITHM_NAME);
044    }
045
046    public Sha512Hash(Object source) {
047        super(ALGORITHM_NAME, source);
048    }
049
050    public Sha512Hash(Object source, Object salt) {
051        super(ALGORITHM_NAME, source, salt);
052    }
053
054    public Sha512Hash(Object source, Object salt, int hashIterations) {
055        super(ALGORITHM_NAME, source, salt, hashIterations);
056    }
057
058    public static Sha512Hash fromHexString(String hex) {
059        Sha512Hash hash = new Sha512Hash();
060        hash.setBytes(Hex.decode(hex));
061        return hash;
062    }
063
064    public static Sha512Hash fromBase64String(String base64) {
065        Sha512Hash hash = new Sha512Hash();
066        hash.setBytes(Base64.decode(base64));
067        return hash;
068    }
069}
070