CTHostIDGenerationUtil.java

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/*
 * Autopsy Forensic Browser
 *
 * Copyright 2023 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.basistech.df.cybertriage.autopsy.ctapi.util;
 
import com.license4j.HardwareID;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.logging.Level;
import org.apache.commons.lang3.StringUtils;
import org.sleuthkit.autopsy.coreutils.Logger;

public class CTHostIDGenerationUtil {
 
    private static final Logger LOGGER = Logger.getLogger(CTHostIDGenerationUtil.class.getName());
    private static final String USER_NAME = System.getProperty("user.name");
    private static String cachedId = "";

    public static String generateLicenseHostID() {
        if (StringUtils.isBlank(cachedId)) {
            try {
                String hostName = StringUtils.defaultString(InetAddress.getLocalHost().getCanonicalHostName());
                String macAddressMd5 = StringUtils.isNotBlank(HardwareID.getHardwareIDFromEthernetAddress())
                        ? Md5HashUtil.getMD5MessageDigest(HardwareID.getHardwareIDFromEthernetAddress()).substring(0, 16)
                        : Md5HashUtil.getMD5MessageDigest(hostName).substring(0, 16);
 
                String usernameMd5 = StringUtils.isNotBlank(USER_NAME)
                        ? Md5HashUtil.getMD5MessageDigest(USER_NAME).substring(0, 16)
                        : Md5HashUtil.getMD5MessageDigest(hostName).substring(0, 16);
 
                cachedId = macAddressMd5 + "_" + usernameMd5;
 
            } catch (UnknownHostException ex) {
                LOGGER.log(Level.WARNING, "Unable to determine host name.", ex);
            }
        }
 
        return cachedId;
    }
}