001/**
002 *
003 * Copyright © 2014 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smack.util;
018
019import java.security.MessageDigest;
020import java.security.NoSuchAlgorithmException;
021
022public class MD5 {
023
024    /**
025     * Used by the hash method.
026     */
027    private static MessageDigest MD5_DIGEST;
028
029    static {
030        try {
031            MD5_DIGEST = MessageDigest.getInstance(StringUtils.MD5);
032        }
033        catch (NoSuchAlgorithmException e) {
034            // Smack wont be able to function normally if this exception is thrown, wrap it into
035            // an ISE and make the user aware of the problem.
036            throw new IllegalStateException(e);
037        }
038    }
039
040    public static synchronized byte[] bytes(byte[] bytes) {
041        return MD5_DIGEST.digest(bytes);
042    }
043
044    public static byte[] bytes(String string) {
045        return bytes(StringUtils.toUtf8Bytes(string));
046    }
047
048    public static String hex(byte[] bytes) {
049        return StringUtils.encodeHex(bytes(bytes));
050    }
051
052    public static String hex(String string) {
053        return hex(StringUtils.toUtf8Bytes(string));
054    }
055
056}