UserPreferences.java

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/*
 * Autopsy Forensic Browser
 *
 * Copyright 2014 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 org.sleuthkit.autopsy.core;

import java.util.Base64;
import java.util.prefs.BackingStoreException;
import org.sleuthkit.autopsy.events.MessageServiceConnectionInfo;
import java.util.prefs.PreferenceChangeListener;
import java.util.prefs.Preferences;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import org.openide.util.NbBundle;
import org.openide.util.NbPreferences;
import org.sleuthkit.autopsy.coreutils.PlatformUtil;
import org.sleuthkit.datamodel.CaseDbConnectionInfo;
import org.sleuthkit.datamodel.TskData.DbType;

public final class UserPreferences {

    private static final boolean isWindowsOS = PlatformUtil.isWindowsOS();
    private static final Preferences preferences = NbPreferences.forModule(UserPreferences.class);
    public static final String KEEP_PREFERRED_VIEWER = "KeepPreferredViewer"; // NON-NLS    
    public static final String HIDE_KNOWN_FILES_IN_DATA_SOURCES_TREE = "HideKnownFilesInDataSourcesTree"; //NON-NLS 
    public static final String HIDE_KNOWN_FILES_IN_VIEWS_TREE = "HideKnownFilesInViewsTree"; //NON-NLS 
    public static final String DISPLAY_TIMES_IN_LOCAL_TIME = "DisplayTimesInLocalTime"; //NON-NLS
    public static final String NUMBER_OF_FILE_INGEST_THREADS = "NumberOfFileIngestThreads"; //NON-NLS
    public static final String IS_MULTI_USER_MODE_ENABLED = "IsMultiUserModeEnabled"; //NON-NLS
    public static final String EXTERNAL_DATABASE_HOSTNAME_OR_IP = "ExternalDatabaseHostnameOrIp"; //NON-NLS
    public static final String EXTERNAL_DATABASE_PORTNUMBER = "ExternalDatabasePortNumber"; //NON-NLS
    public static final String EXTERNAL_DATABASE_NAME = "ExternalDatabaseName"; //NON-NLS
    public static final String EXTERNAL_DATABASE_USER = "ExternalDatabaseUsername"; //NON-NLS
    public static final String EXTERNAL_DATABASE_PASSWORD = "ExternalDatabasePassword"; //NON-NLS
    public static final String EXTERNAL_DATABASE_TYPE = "ExternalDatabaseType"; //NON-NLS    
    public static final String INDEXING_SERVER_HOST = "IndexingServerHost"; //NON-NLS
    public static final String INDEXING_SERVER_PORT = "IndexingServerPort"; //NON-NLS
    private static final String MESSAGE_SERVICE_PASSWORD = "MessageServicePassword"; //NON-NLS
    private static final String MESSAGE_SERVICE_USER = "MessageServiceUser"; //NON-NLS
    private static final String MESSAGE_SERVICE_HOST = "MessageServiceHost"; //NON-NLS
    private static final String MESSAGE_SERVICE_PORT = "MessageServicePort"; //NON-NLS
    public static final String PROCESS_TIME_OUT_ENABLED = "ProcessTimeOutEnabled"; //NON-NLS     
    public static final String PROCESS_TIME_OUT_HOURS = "ProcessTimeOutHours"; //NON-NLS  
    private static final int DEFAULT_PROCESS_TIMEOUT_HR = 60;
    private static final String DEFAULT_PORT_STRING = "61616";
    private static final int DEFAULT_PORT_INT = 61616;
    private static final String APP_NAME = "AppName";

    // Prevent instantiation.
    private UserPreferences() {
    }

    public static void reloadFromStorage() throws BackingStoreException {
        preferences.sync();
    }

    public static void saveToStorage() throws BackingStoreException {
        preferences.flush();
    }

    public static void addChangeListener(PreferenceChangeListener listener) {
        preferences.addPreferenceChangeListener(listener);
    }

    public static void removeChangeListener(PreferenceChangeListener listener) {
        preferences.removePreferenceChangeListener(listener);
    }

    public static boolean keepPreferredContentViewer() {
        return preferences.getBoolean(KEEP_PREFERRED_VIEWER, false);
    }

    public static void setKeepPreferredContentViewer(boolean value) {
        preferences.putBoolean(KEEP_PREFERRED_VIEWER, value);
    }

    public static boolean hideKnownFilesInDataSourcesTree() {
        return preferences.getBoolean(HIDE_KNOWN_FILES_IN_DATA_SOURCES_TREE, false);
    }

    public static void setHideKnownFilesInDataSourcesTree(boolean value) {
        preferences.putBoolean(HIDE_KNOWN_FILES_IN_DATA_SOURCES_TREE, value);
    }

    public static boolean hideKnownFilesInViewsTree() {
        return preferences.getBoolean(HIDE_KNOWN_FILES_IN_VIEWS_TREE, true);
    }

    public static void setHideKnownFilesInViewsTree(boolean value) {
        preferences.putBoolean(HIDE_KNOWN_FILES_IN_VIEWS_TREE, value);
    }

    public static boolean displayTimesInLocalTime() {
        return preferences.getBoolean(DISPLAY_TIMES_IN_LOCAL_TIME, true);
    }

    public static void setDisplayTimesInLocalTime(boolean value) {
        preferences.putBoolean(DISPLAY_TIMES_IN_LOCAL_TIME, value);
    }

    public static int numberOfFileIngestThreads() {
        return preferences.getInt(NUMBER_OF_FILE_INGEST_THREADS, 2);
    }

    public static void setNumberOfFileIngestThreads(int value) {
        preferences.putInt(NUMBER_OF_FILE_INGEST_THREADS, value);
    }

    public static CaseDbConnectionInfo getDatabaseConnectionInfo() throws UserPreferencesException {
        DbType dbType;
        try {
            dbType = DbType.valueOf(preferences.get(EXTERNAL_DATABASE_TYPE, "POSTGRESQL")); //NON-NLS
        } catch (Exception ex) {
            dbType = DbType.SQLITE;
        }
        return new CaseDbConnectionInfo(
                preferences.get(EXTERNAL_DATABASE_HOSTNAME_OR_IP, ""),
                preferences.get(EXTERNAL_DATABASE_PORTNUMBER, "5432"),
                preferences.get(EXTERNAL_DATABASE_USER, ""),
                TextConverter.convertHexTextToText(preferences.get(EXTERNAL_DATABASE_PASSWORD, "")),
                dbType);
    }

    public static void setDatabaseConnectionInfo(CaseDbConnectionInfo connectionInfo) throws UserPreferencesException {
        preferences.put(EXTERNAL_DATABASE_HOSTNAME_OR_IP, connectionInfo.getHost());
        preferences.put(EXTERNAL_DATABASE_PORTNUMBER, connectionInfo.getPort());
        preferences.put(EXTERNAL_DATABASE_USER, connectionInfo.getUserName());
        preferences.put(EXTERNAL_DATABASE_PASSWORD, TextConverter.convertTextToHexText(connectionInfo.getPassword()));
        preferences.put(EXTERNAL_DATABASE_TYPE, connectionInfo.getDbType().toString());
    }

    public static void setIsMultiUserModeEnabled(boolean enabled) {
        preferences.putBoolean(IS_MULTI_USER_MODE_ENABLED, enabled);
    }

    public static boolean getIsMultiUserModeEnabled() {
        if (!isWindowsOS) {
            return false;
        }
        return preferences.getBoolean(IS_MULTI_USER_MODE_ENABLED, false);
    }

    public static String getIndexingServerHost() {
        return preferences.get(INDEXING_SERVER_HOST, "");
    }

    public static void setIndexingServerHost(String hostName) {
        preferences.put(INDEXING_SERVER_HOST, hostName);
    }

    public static String getIndexingServerPort() {
        return preferences.get(INDEXING_SERVER_PORT, "8983");
    }

    public static void setIndexingServerPort(int port) {
        preferences.putInt(INDEXING_SERVER_PORT, port);
    }

    public static void setMessageServiceConnectionInfo(MessageServiceConnectionInfo info) throws UserPreferencesException {
        preferences.put(MESSAGE_SERVICE_HOST, info.getHost());
        preferences.put(MESSAGE_SERVICE_PORT, Integer.toString(info.getPort()));
        preferences.put(MESSAGE_SERVICE_USER, info.getUserName());
        preferences.put(MESSAGE_SERVICE_PASSWORD, TextConverter.convertTextToHexText(info.getPassword()));
    }

    public static MessageServiceConnectionInfo getMessageServiceConnectionInfo() throws UserPreferencesException {
        int port;
        try {
            port = Integer.parseInt(preferences.get(MESSAGE_SERVICE_PORT, DEFAULT_PORT_STRING));
        } catch (NumberFormatException ex) {
            // if there is an error parsing the port number, use the default port number
            port = DEFAULT_PORT_INT;
        }

        return new MessageServiceConnectionInfo(
                preferences.get(MESSAGE_SERVICE_HOST, ""),
                port,
                preferences.get(MESSAGE_SERVICE_USER, ""),
                TextConverter.convertHexTextToText(preferences.get(MESSAGE_SERVICE_PASSWORD, "")));
    }

    public static int getProcessTimeOutHrs() {
        int timeOut = preferences.getInt(PROCESS_TIME_OUT_HOURS, DEFAULT_PROCESS_TIMEOUT_HR);
        if (timeOut < 0) {
            timeOut = 0;
        }
        return timeOut;
    }

    public static void setProcessTimeOutHrs(int value) {
        if (value < 0) {
            value = 0;
        }
        preferences.putInt(PROCESS_TIME_OUT_HOURS, value);
    }

    public static boolean getIsTimeOutEnabled() {
        boolean enabled = preferences.getBoolean(PROCESS_TIME_OUT_ENABLED, false);
        return enabled;
    }

    public static void setIsTimeOutEnabled(boolean enabled) {
        preferences.putBoolean(PROCESS_TIME_OUT_ENABLED, enabled);
    }
    
    public static String getAppName(){
        return preferences.get(APP_NAME, "Autopsy");
    }
    
    public static void setAppName(String name){
        preferences.put(APP_NAME, name);
    }
    
    
    static final class TextConverter {

        private static final char[] TMP = "hgleri21auty84fwe".toCharArray(); //NON-NLS
        private static final byte[] SALT = {
            (byte) 0xde, (byte) 0x33, (byte) 0x10, (byte) 0x12,
            (byte) 0xde, (byte) 0x33, (byte) 0x10, (byte) 0x12,};

        static String convertTextToHexText(String property) throws UserPreferencesException {
            try {
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES"); //NON-NLS
                SecretKey key = keyFactory.generateSecret(new PBEKeySpec(TMP));
                Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES"); //NON-NLS
                pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
                return base64Encode(pbeCipher.doFinal(property.getBytes("UTF-8")));
            } catch (Exception ex) {
                throw new UserPreferencesException(
                        NbBundle.getMessage(TextConverter.class, "TextConverter.convert.exception.txt"));
            }
        }

        private static String base64Encode(byte[] bytes) {
            return Base64.getEncoder().encodeToString(bytes);
        }

        static String convertHexTextToText(String property) throws UserPreferencesException {
            try {
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES"); //NON-NLS
                SecretKey key = keyFactory.generateSecret(new PBEKeySpec(TMP));
                Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES"); //NON-NLS
                pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
                return new String(pbeCipher.doFinal(base64Decode(property)), "UTF-8");
            } catch (Exception ex) {
                throw new UserPreferencesException(
                        NbBundle.getMessage(TextConverter.class, "TextConverter.convertFromHex.exception.txt"));
            }
        }

        private static byte[] base64Decode(String property) {
            return Base64.getDecoder().decode(property);
        }
    }
}