mirror of
https://github.com/overcuriousity/autopsy-flatpak.git
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Clean up EmbeddedFileExtractorIngestModule.java
This commit is contained in:
Richard Cordovano
parent
25f6f2657f
commit
6955416f02
@ -1,7 +1,7 @@
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/*
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* Autopsy Forensic Browser
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*
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* Copyright 2013-2014 Basis Technology Corp.
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* Copyright 2013-2017 Basis Technology Corp.
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* Contact: carrier <at> sleuthkit <dot> org
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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@ -19,66 +19,57 @@
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package org.sleuthkit.autopsy.modules.embeddedfileextractor;
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import java.io.File;
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import java.util.logging.Level;
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import java.nio.file.Paths;
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import org.openide.util.NbBundle;
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import org.sleuthkit.autopsy.casemodule.Case;
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import org.sleuthkit.autopsy.coreutils.Logger;
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import org.sleuthkit.autopsy.ingest.IngestServices;
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import org.sleuthkit.datamodel.AbstractFile;
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import org.sleuthkit.autopsy.ingest.FileIngestModule;
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import org.sleuthkit.datamodel.TskData;
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import org.sleuthkit.autopsy.ingest.IngestModule.ProcessResult;
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import org.sleuthkit.autopsy.ingest.IngestJobContext;
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import org.sleuthkit.autopsy.ingest.IngestMessage;
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import org.sleuthkit.autopsy.ingest.IngestModuleReferenceCounter;
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import org.sleuthkit.autopsy.modules.embeddedfileextractor.ImageExtractor.SupportedImageExtractionFormats;
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import org.sleuthkit.autopsy.modules.filetypeid.FileTypeDetector;
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import net.sf.sevenzipjbinding.SevenZipNativeInitializationException;
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import org.sleuthkit.autopsy.ingest.FileIngestModuleAdapter;
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/**
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* Embedded File Extractor ingest module extracts embedded files from supported
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* archives and documents, adds extracted embedded DerivedFiles, reschedules
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* extracted DerivedFiles for ingest.
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* A file level ingest module that extracts embedded files from supported
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* archive and document formats.
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*/
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@NbBundle.Messages({
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"CannotCreateOutputFolder=Unable to create output folder.",
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"CannotRunFileTypeDetection=Unable to run file type detection.",
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"UnableToInitializeLibraries=Unable to initialize 7Zip libraries."
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})
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public final class EmbeddedFileExtractorIngestModule implements FileIngestModule {
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public final class EmbeddedFileExtractorIngestModule extends FileIngestModuleAdapter {
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private static final Logger logger = Logger.getLogger(EmbeddedFileExtractorIngestModule.class.getName());
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private final IngestServices services = IngestServices.getInstance();
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static final String[] SUPPORTED_EXTENSIONS = {"zip", "rar", "arj", "7z", "7zip", "gzip", "gz", "bzip2", "tar", "tgz",}; // "iso"}; NON-NLS
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private IngestJobContext context;
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private long jobId;
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private final static IngestModuleReferenceCounter refCounter = new IngestModuleReferenceCounter();
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private String moduleDirRelative;
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private String moduleDirAbsolute;
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private boolean archivextraction;
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private boolean imageExtraction;
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private ImageExtractor imageExtractor;
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private SevenZipExtractor archiveExtractor;
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SupportedImageExtractionFormats abstractFileExtractionFormat;
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FileTypeDetector fileTypeDetector;
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private FileTypeDetector fileTypeDetector;
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/**
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* Constructs a file level ingest module that extracts embedded files from
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* supported archive and document formats.
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*/
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EmbeddedFileExtractorIngestModule() {
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}
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@Override
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public void startUp(IngestJobContext context) throws IngestModuleException {
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this.context = context;
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jobId = context.getJobId();
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/*
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* Construct absolute and relative paths to the output directory. The
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* relative path is relative to the case folder, and will be used in the
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* case database for extracted (derived) file paths. The absolute path
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* is used to write the extracted (derived) files to local storage.
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*/
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final Case currentCase = Case.getCurrentCase();
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moduleDirRelative = Paths.get(currentCase.getModuleOutputDirectoryRelativePath(), EmbeddedFileExtractorModuleFactory.getModuleName()).toString();
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moduleDirAbsolute = Paths.get(currentCase.getModuleDirectory(), EmbeddedFileExtractorModuleFactory.getModuleName()).toString();
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moduleDirRelative = currentCase.getModuleOutputDirectoryRelativePath() + File.separator + EmbeddedFileExtractorModuleFactory.getModuleName(); //relative to the case, to store in db
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moduleDirAbsolute = currentCase.getModuleDirectory() + File.separator + EmbeddedFileExtractorModuleFactory.getModuleName(); //absolute, to extract to
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// initialize the folder where the embedded files are extracted.
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/*
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* Create the output directory.
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*/
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File extractionDirectory = new File(moduleDirAbsolute);
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if (!extractionDirectory.exists()) {
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try {
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@ -88,71 +79,77 @@ public final class EmbeddedFileExtractorIngestModule implements FileIngestModule
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}
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}
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// initialize the filetypedetector
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/*
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* Construct a file type detector.
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*/
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try {
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fileTypeDetector = new FileTypeDetector();
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} catch (FileTypeDetector.FileTypeDetectorInitException ex) {
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throw new IngestModuleException(Bundle.CannotRunFileTypeDetection(), ex);
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}
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// initialize the extraction modules.
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/*
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* Construct a 7Zip file extractor for processing archive files.
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*/
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try {
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this.archiveExtractor = new SevenZipExtractor(context, fileTypeDetector, moduleDirRelative, moduleDirAbsolute);
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} catch (SevenZipNativeInitializationException ex) {
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throw new IngestModuleException(Bundle.UnableToInitializeLibraries(), ex);
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}
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/*
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* Construct an embedded images extractor for processing Microsoft
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* Office documents.
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*/
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this.imageExtractor = new ImageExtractor(context, fileTypeDetector, moduleDirRelative, moduleDirAbsolute);
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}
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@Override
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public ProcessResult process(AbstractFile abstractFile) {
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// skip the unallocated blocks
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if ((abstractFile.getType().equals(TskData.TSK_DB_FILES_TYPE_ENUM.UNALLOC_BLOCKS)) ||
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(abstractFile.getType().equals(TskData.TSK_DB_FILES_TYPE_ENUM.SLACK))) {
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/*
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* Skip unallocated space files.
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*/
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if ((abstractFile.getType().equals(TskData.TSK_DB_FILES_TYPE_ENUM.UNALLOC_BLOCKS))
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|| (abstractFile.getType().equals(TskData.TSK_DB_FILES_TYPE_ENUM.SLACK))) {
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return ProcessResult.OK;
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}
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// skip known files
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/*
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* Skip known files.
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*/
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if (abstractFile.getKnown().equals(TskData.FileKnown.KNOWN)) {
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return ProcessResult.OK;
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}
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// check if the file is supported by either of the two embedded file extractors.
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this.archivextraction = archiveExtractor.isSevenZipExtractionSupported(abstractFile);
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this.imageExtraction = imageExtractor.isImageExtractionSupported(abstractFile);
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if (!abstractFile.isFile() && (!this.archivextraction || !this.imageExtraction)) {
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/*
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* Skip directories, etc.
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*/
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if (!abstractFile.isFile()) {
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return ProcessResult.OK;
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}
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// call the archive extractor if archiveExtraction flag is set.
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if (this.archivextraction) {
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/*
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* Attempt embedded file extraction for the file if it is a supported
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* type/format.
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*/
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if (archiveExtractor.isSevenZipExtractionSupported(abstractFile)) {
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archiveExtractor.unpack(abstractFile);
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}
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// calling the image extractor if imageExtraction flag set.
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if (this.imageExtraction) {
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} else if (imageExtractor.isImageExtractionSupported(abstractFile)) {
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imageExtractor.extractImage(abstractFile);
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}
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return ProcessResult.OK;
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}
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@Override
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public void shutDown() {
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// We don't need the value, but for cleanliness and consistency
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refCounter.decrementAndGet(jobId);
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/**
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* Creates a unique name for a file by concatentating the file name and the
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* file object id.
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*
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* @param file The file.
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*
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* @return The unique file name.
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*/
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static String getUniqueName(AbstractFile file) {
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return file.getName() + "_" + file.getId();
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}
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/**
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* Get local relative path to the unpacked archive root
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*
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* @param archiveFile
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*
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* @return
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*/
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static String getUniqueName(AbstractFile archiveFile) {
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return archiveFile.getName() + "_" + archiveFile.getId();
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}
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}
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