ExtractSafari.java

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/*
 *
 * Autopsy Forensic Browser
 *
 * Copyright 2019 Basis Technology Corp.
 *
 * 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.recentactivity;

import com.dd.plist.NSArray;
import com.dd.plist.NSDate;
import com.dd.plist.NSDictionary;
import com.dd.plist.NSObject;
import com.dd.plist.NSString;
import com.dd.plist.PropertyListFormatException;
import com.dd.plist.PropertyListParser;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.commons.io.FilenameUtils;
import org.openide.util.NbBundle.Messages;
import org.sleuthkit.autopsy.casemodule.services.FileManager;
import org.sleuthkit.autopsy.coreutils.Logger;
import org.sleuthkit.autopsy.coreutils.NetworkUtils;
import org.sleuthkit.autopsy.datamodel.ContentUtils;
import org.sleuthkit.autopsy.ingest.DataSourceIngestModuleProgress;
import org.sleuthkit.autopsy.ingest.IngestJobContext;
import org.sleuthkit.autopsy.ingest.IngestServices;
import org.sleuthkit.autopsy.ingest.ModuleDataEvent;
import org.sleuthkit.autopsy.recentactivity.BinaryCookieReader.Cookie;
import org.sleuthkit.datamodel.AbstractFile;
import org.sleuthkit.datamodel.BlackboardArtifact;
import org.sleuthkit.datamodel.Content;
import org.sleuthkit.datamodel.TskCoreException;
import org.xml.sax.SAXException;

final class ExtractSafari extends Extract {

    private final IngestServices services = IngestServices.getInstance();

    // visit_time uses an epoch of Jan 1, 2001 thus the addition of 978307200
    private static final String HISTORY_QUERY = "SELECT url, title, visit_time + 978307200 as time FROM 'history_items' JOIN history_visits ON history_item = history_items.id;"; //NON-NLS

    private static final String HISTORY_FILE_NAME = "History.db"; //NON-NLS
    private static final String BOOKMARK_FILE_NAME = "Bookmarks.plist"; //NON-NLS
    private static final String DOWNLOAD_FILE_NAME = "Downloads.plist"; //NON-NLS
    private static final String COOKIE_FILE_NAME = "Cookies.binarycookies"; //NON-NLS
    private static final String COOKIE_FOLDER = "Cookies";
    private static final String SAFARI_FOLDER = "Safari";

    private static final String HEAD_URL = "url"; //NON-NLS
    private static final String HEAD_TITLE = "title"; //NON-NLS
    private static final String HEAD_TIME = "time"; //NON-NLS

    private static final String PLIST_KEY_CHILDREN = "Children"; //NON-NLS
    private static final String PLIST_KEY_URL = "URLString"; //NON-NLS
    private static final String PLIST_KEY_URI = "URIDictionary"; //NON-NLS
    private static final String PLIST_KEY_TITLE = "title"; //NON-NLS
    private static final String PLIST_KEY_DOWNLOAD_URL = "DownloadEntryURL"; //NON-NLS
    private static final String PLIST_KEY_DOWNLOAD_DATE = "DownloadEntryDateAddedKey"; //NON-NLS
    private static final String PLIST_KEY_DOWNLOAD_PATH = "DownloadEntryPath"; //NON-NLS
    private static final String PLIST_KEY_DOWNLOAD_HISTORY = "DownloadHistory"; //NON-NLS

    private static final Logger LOG = Logger.getLogger(ExtractSafari.class.getName());

    @Messages({
        "ExtractSafari_Module_Name=Safari",
        "ExtractSafari_Error_Getting_History=An error occurred while processing Safari history files.",
        "ExtractSafari_Error_Parsing_Bookmark=An error occured while processing Safari Bookmark files",
        "ExtractSafari_Error_Parsing_Cookies=An error occured while processing Safari Cookies files",
        "Progress_Message_Safari_History=Safari History",
        "Progress_Message_Safari_Bookmarks=Safari Bookmarks",
        "Progress_Message_Safari_Cookies=Safari Cookies",
        "Progress_Message_Safari_Downloads=Safari Downloads",
    })

    ExtractSafari() {

    }

    @Override
    protected String getName() {
        return Bundle.ExtractSafari_Module_Name();
    }

    @Override
    void process(Content dataSource, IngestJobContext context, DataSourceIngestModuleProgress progressBar) {
        setFoundData(false);
        
        progressBar.progress(Bundle.Progress_Message_Safari_Cookies());
        try {
            processHistoryDB(dataSource, context);

        } catch (IOException | TskCoreException ex) {
            this.addErrorMessage(Bundle.ExtractSafari_Error_Getting_History());
            LOG.log(Level.SEVERE, "Exception thrown while processing history file.", ex); //NON-NLS
        }

        progressBar.progress(Bundle.Progress_Message_Safari_Bookmarks());
        try {
            processBookmarkPList(dataSource, context);
        } catch (IOException | TskCoreException | SAXException | PropertyListFormatException | ParseException | ParserConfigurationException ex) {
            this.addErrorMessage(Bundle.ExtractSafari_Error_Parsing_Bookmark());
            LOG.log(Level.SEVERE, "Exception thrown while parsing Safari Bookmarks file.", ex); //NON-NLS
        }
        
        progressBar.progress(Bundle.Progress_Message_Safari_Downloads());
        try {
            processDownloadsPList(dataSource, context);
        } catch (IOException | TskCoreException | SAXException | PropertyListFormatException | ParseException | ParserConfigurationException ex) {
            this.addErrorMessage(Bundle.ExtractSafari_Error_Parsing_Bookmark());
            LOG.log(Level.SEVERE, "Exception thrown while parsing Safari Download.plist file.", ex); //NON-NLS
        }

        progressBar.progress(Bundle.Progress_Message_Safari_Cookies());
        try {
            processBinaryCookieFile(dataSource, context);
        } catch (TskCoreException ex) {
            this.addErrorMessage(Bundle.ExtractSafari_Error_Parsing_Cookies());
            LOG.log(Level.SEVERE, "Exception thrown while processing Safari cookies file.", ex); //NON-NLS
        }
    }

    private void processHistoryDB(Content dataSource, IngestJobContext context) throws TskCoreException, IOException {
        FileManager fileManager = getCurrentCase().getServices().getFileManager();

        List<AbstractFile> historyFiles = fileManager.findFiles(dataSource, HISTORY_FILE_NAME, SAFARI_FOLDER);

        if (historyFiles == null || historyFiles.isEmpty()) {
            return;
        }

        setFoundData(true);

        for (AbstractFile historyFile : historyFiles) {
            if (context.dataSourceIngestIsCancelled()) {
                break;
            }

            getHistory(context, historyFile);
        }
    }

    private void processBookmarkPList(Content dataSource, IngestJobContext context) throws TskCoreException, IOException, SAXException, PropertyListFormatException, ParseException, ParserConfigurationException {
        FileManager fileManager = getCurrentCase().getServices().getFileManager();

        List<AbstractFile> files = fileManager.findFiles(dataSource, BOOKMARK_FILE_NAME, SAFARI_FOLDER);

        if (files == null || files.isEmpty()) {
            return;
        }

        setFoundData(true);

        for (AbstractFile file : files) {
            if (context.dataSourceIngestIsCancelled()) {
                break;
            }

            getBookmarks(context, file);
        }
    }
    
    private void processDownloadsPList(Content dataSource, IngestJobContext context) throws TskCoreException, IOException, SAXException, PropertyListFormatException, ParseException, ParserConfigurationException {
        FileManager fileManager = getCurrentCase().getServices().getFileManager();

        List<AbstractFile> files = fileManager.findFiles(dataSource, DOWNLOAD_FILE_NAME, SAFARI_FOLDER);

        if (files == null || files.isEmpty()) {
            return;
        }

        setFoundData(true);

        for (AbstractFile file : files) {
            if (context.dataSourceIngestIsCancelled()) {
                break;
            }

            getDownloads(dataSource, context, file);
        }
    }
    
    private void processBinaryCookieFile(Content dataSource, IngestJobContext context) throws TskCoreException {
        FileManager fileManager = getCurrentCase().getServices().getFileManager();

        List<AbstractFile> files = fileManager.findFiles(dataSource, COOKIE_FILE_NAME, COOKIE_FOLDER);

        if (files == null || files.isEmpty()) {
            return;
        }

        setFoundData(true);

        for (AbstractFile file : files) {
            if (context.dataSourceIngestIsCancelled()) {
                break;
            }
            try {
                getCookies(context, file);
            } catch (IOException ex) {
                LOG.log(Level.WARNING, String.format("Failed to get cookies from file %s", Paths.get(file.getUniquePath(), file.getName()).toString()), ex); 
            }   
        }
    }

    private void getHistory(IngestJobContext context, AbstractFile historyFile) throws TskCoreException, IOException {
        if (historyFile.getSize() == 0) {
            return;
        }

        File tempHistoryFile = createTemporaryFile(context, historyFile);

        try {
            ContentUtils.writeToFile(historyFile, tempHistoryFile, context::dataSourceIngestIsCancelled);
        } catch (IOException ex) {
            throw new IOException("Error writingToFile: " + historyFile, ex); //NON-NLS
        }

        try {
            postArtifacts(getHistoryArtifacts(historyFile, tempHistoryFile.toPath(), context));
        } finally {
            tempHistoryFile.delete();
        }
    }

    private void getBookmarks(IngestJobContext context, AbstractFile file) throws TskCoreException, IOException, SAXException, PropertyListFormatException, ParseException, ParserConfigurationException {
        if (file.getSize() == 0) {
            return;
        }

        File tempFile = createTemporaryFile(context, file);

        try {
            postArtifacts(getBookmarkArtifacts(file, tempFile, context));
        } finally {
            tempFile.delete();
        }

    }
    
    private void getDownloads(Content dataSource, IngestJobContext context, AbstractFile file) throws TskCoreException, IOException, SAXException, PropertyListFormatException, ParseException, ParserConfigurationException {
        if (file.getSize() == 0) {
            return;
        }

        File tempFile = createTemporaryFile(context, file);

        try {
            postArtifacts(getDownloadArtifacts(dataSource, file, tempFile));
            
        } finally {
            if (tempFile != null) {
                tempFile.delete();
            }
        }

    }
    
    private void getCookies(IngestJobContext context, AbstractFile file) throws TskCoreException, IOException {
        if (file.getSize() == 0) {
            return;
        }

        File tempFile = null;

        try {
            tempFile = createTemporaryFile(context, file);

            postArtifacts(getCookieArtifacts(file, tempFile, context));
           
        } finally {
            if (tempFile != null) {
                tempFile.delete();
            }
        }
    }

    private Collection<BlackboardArtifact> getHistoryArtifacts(AbstractFile origFile, Path tempFilePath, IngestJobContext context) throws TskCoreException {
        List<HashMap<String, Object>> historyList = this.dbConnect(tempFilePath.toString(), HISTORY_QUERY);

        if (historyList == null || historyList.isEmpty()) {
            return null;
        }

        Collection<BlackboardArtifact> bbartifacts = new ArrayList<>();
        for (HashMap<String, Object> row : historyList) {
            if (context.dataSourceIngestIsCancelled()) {
                return bbartifacts;
            }
            
            String url = row.get(HEAD_URL).toString();
            String title = row.get(HEAD_TITLE).toString();
            Long time = (Double.valueOf(row.get(HEAD_TIME).toString())).longValue();

            BlackboardArtifact bbart = origFile.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_WEB_HISTORY);
            bbart.addAttributes(createHistoryAttribute(url, time, null, title,
                    this.getName(), NetworkUtils.extractDomain(url), null));
            bbartifacts.add(bbart);
        }

        return bbartifacts;
    }

    private Collection<BlackboardArtifact> getBookmarkArtifacts(AbstractFile origFile, File tempFile, IngestJobContext context) throws IOException, PropertyListFormatException, ParseException, ParserConfigurationException, SAXException, TskCoreException {
        Collection<BlackboardArtifact> bbartifacts = new ArrayList<>();

        try {
            NSDictionary root = (NSDictionary) PropertyListParser.parse(tempFile);

            parseBookmarkDictionary(bbartifacts, origFile, root, context);
        } catch (PropertyListFormatException ex) {
            PropertyListFormatException plfe = new PropertyListFormatException(origFile.getName() + ": " + ex.getMessage());
            plfe.setStackTrace(ex.getStackTrace());
            throw plfe;
        } catch (ParseException ex) {
            ParseException pe = new ParseException(origFile.getName() + ": " + ex.getMessage(), ex.getErrorOffset());
            pe.setStackTrace(ex.getStackTrace());
            throw pe;
        } catch (ParserConfigurationException ex) {
            ParserConfigurationException pce = new ParserConfigurationException(origFile.getName() + ": " + ex.getMessage());
            pce.setStackTrace(ex.getStackTrace());
            throw pce;
        } catch (SAXException ex) {
            SAXException se = new SAXException(origFile.getName() + ": " + ex.getMessage());
            se.setStackTrace(ex.getStackTrace());
            throw se;
        }

        return bbartifacts;
    }
    
    private Collection<BlackboardArtifact> getDownloadArtifacts(Content dataSource, AbstractFile origFile, File tempFile)throws IOException, PropertyListFormatException, ParseException, ParserConfigurationException, SAXException, TskCoreException {
         Collection<BlackboardArtifact> bbartifacts = null;

        try {
            while(true){
                NSDictionary root = (NSDictionary)PropertyListParser.parse(tempFile);

                if(root == null)
                    break;

                NSArray nsArray = (NSArray)root.get(PLIST_KEY_DOWNLOAD_HISTORY);

                if(nsArray == null)
                    break;
           
                NSObject[] objectArray = nsArray.getArray();
                bbartifacts = new ArrayList<>();

                for(NSObject obj: objectArray){
                    if(obj instanceof NSDictionary){
                        bbartifacts.addAll(parseDownloadDictionary(dataSource, origFile, (NSDictionary)obj));
                    }
                }
                break;
            }
            
        } catch (PropertyListFormatException ex) {
            PropertyListFormatException plfe = new PropertyListFormatException(origFile.getName() + ": " + ex.getMessage());
            plfe.setStackTrace(ex.getStackTrace());
            throw plfe;
        } catch (ParseException ex) {
            ParseException pe = new ParseException(origFile.getName() + ": " + ex.getMessage(), ex.getErrorOffset());
            pe.setStackTrace(ex.getStackTrace());
            throw pe;
        } catch (ParserConfigurationException ex) {
            ParserConfigurationException pce = new ParserConfigurationException(origFile.getName() + ": " + ex.getMessage());
            pce.setStackTrace(ex.getStackTrace());
            throw pce;
        } catch (SAXException ex) {
            SAXException se = new SAXException(origFile.getName() + ": " + ex.getMessage());
            se.setStackTrace(ex.getStackTrace());
            throw se;
        }

        return bbartifacts;
    }
    
    private Collection<BlackboardArtifact> getCookieArtifacts(AbstractFile origFile, File tempFile, IngestJobContext context) throws TskCoreException, IOException {
        Collection<BlackboardArtifact> bbartifacts = null;
        BinaryCookieReader reader = BinaryCookieReader.initalizeReader(tempFile);

        if (reader != null) {
            bbartifacts = new ArrayList<>();

            Iterator<Cookie> iter = reader.iterator();
            while (iter.hasNext()) {
                if (context.dataSourceIngestIsCancelled()) {
                    return bbartifacts;
                }
                
                Cookie cookie = iter.next();

                BlackboardArtifact bbart = origFile.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_WEB_COOKIE);
                bbart.addAttributes(createCookieAttributes(cookie.getURL(), cookie.getCreationDate(), cookie.getName(), cookie.getValue(), this.getName(), NetworkUtils.extractDomain(cookie.getURL())));
                bbartifacts.add(bbart);
            }
        }

        return bbartifacts;
    }

    private void parseBookmarkDictionary(Collection<BlackboardArtifact> bbartifacts, AbstractFile origFile, NSDictionary root, IngestJobContext context) throws TskCoreException {

        if (context.dataSourceIngestIsCancelled()) {
            return;
        }

        if (root.containsKey(PLIST_KEY_CHILDREN)) {
            NSArray children = (NSArray) root.objectForKey(PLIST_KEY_CHILDREN);

            if (children != null) {
                for (NSObject obj : children.getArray()) {
                    parseBookmarkDictionary(bbartifacts, origFile, (NSDictionary) obj, context);
                }
            }
        } else if (root.containsKey(PLIST_KEY_URL)) {
            String url = null;
            String title = null;

            NSString nsstr = (NSString) root.objectForKey(PLIST_KEY_URL);
            if (nsstr != null) {
                url = nsstr.toString();
            }

            NSDictionary dic = (NSDictionary) root.get(PLIST_KEY_URI);

            nsstr = (NSString) root.objectForKey(PLIST_KEY_TITLE);

            if (nsstr != null) {
                title = ((NSString) dic.get(PLIST_KEY_TITLE)).toString();
            }

            if (url != null || title != null) {
                BlackboardArtifact bbart = origFile.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_WEB_BOOKMARK);
                bbart.addAttributes(createBookmarkAttributes(url, title, null, getName(), NetworkUtils.extractDomain(url)));
                bbartifacts.add(bbart);
            }
        }
    }
    
    private Collection<BlackboardArtifact> parseDownloadDictionary(Content dataSource, AbstractFile origFile, NSDictionary entry) throws TskCoreException {
        Collection<BlackboardArtifact> bbartifacts = new ArrayList<>();
        String url = null;
        String path = null;
        Long time = null;
        Long pathID = null;
        
        FileManager fileManager = getCurrentCase().getServices().getFileManager();
        
        NSString nsstring = (NSString) entry.get(PLIST_KEY_DOWNLOAD_URL);
        if (nsstring != null) {
            url = nsstring.toString();
        }

        nsstring = (NSString) entry.get(PLIST_KEY_DOWNLOAD_PATH);
        if (nsstring != null) {
            path = nsstring.toString();
            pathID = Util.findID(dataSource, path);
        }

        NSDate date = (NSDate) entry.get(PLIST_KEY_DOWNLOAD_DATE);
        if (date != null) {
            time = date.getDate().getTime();
        }

        BlackboardArtifact bbart = origFile.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_WEB_DOWNLOAD);
        bbart.addAttributes(this.createDownloadAttributes(path, pathID, url, time, NetworkUtils.extractDomain(url), getName()));
        bbartifacts.add(bbart);
        
        // find the downloaded file and create a TSK_DOWNLOAD_SOURCE for it.
        for (AbstractFile downloadedFile : fileManager.findFiles(dataSource, FilenameUtils.getName(path), FilenameUtils.getPath(path))) {
            BlackboardArtifact downloadSourceArt =  downloadedFile.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_DOWNLOAD_SOURCE);
            downloadSourceArt.addAttributes(createDownloadSourceAttributes(url));
            bbartifacts.add(downloadSourceArt);
            break;
        }
        
        return bbartifacts;
    }
}