Autopsy  4.6.0
Graphical digital forensics platform for The Sleuth Kit and other tools.
FilesIdentifierIngestModule.java
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1 /*
2  * Autopsy Forensic Browser
3  *
4  * Copyright 2014-2018 Basis Technology Corp.
5  * Contact: carrier <at> sleuthkit <dot> org
6  *
7  * Licensed under the Apache License, Version 2.0 (the "License");
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9  * You may obtain a copy of the License at
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11  * http://www.apache.org/licenses/LICENSE-2.0
12  *
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16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19 package org.sleuthkit.autopsy.modules.interestingitems;
20 
21 import java.util.ArrayList;
22 import java.util.Collection;
23 import java.util.Collections;
24 import java.util.List;
25 import java.util.Map;
26 import java.util.concurrent.ConcurrentHashMap;
27 import java.util.logging.Level;
28 import org.openide.util.NbBundle;
29 import org.openide.util.NbBundle.Messages;
41 import org.sleuthkit.datamodel.AbstractFile;
42 import org.sleuthkit.datamodel.BlackboardArtifact;
43 import org.sleuthkit.datamodel.BlackboardAttribute;
44 import org.sleuthkit.datamodel.TskCoreException;
45 import org.sleuthkit.datamodel.TskData;
46 
51 @NbBundle.Messages({
52  "FilesIdentifierIngestModule.getFilesError=Error getting interesting files sets from file."
53 })
54 final class FilesIdentifierIngestModule implements FileIngestModule {
55 
56  private static final Object sharedResourcesLock = new Object();
57  private static final Logger logger = Logger.getLogger(FilesIdentifierIngestModule.class.getName());
58  private static final IngestModuleReferenceCounter refCounter = new IngestModuleReferenceCounter();
59  private static final Map<Long, List<FilesSet>> interestingFileSetsByJob = new ConcurrentHashMap<>();
60  private final FilesIdentifierIngestJobSettings settings;
61  private final IngestServices services = IngestServices.getInstance();
62  private IngestJobContext context;
63  private Blackboard blackboard;
64 
71  FilesIdentifierIngestModule(FilesIdentifierIngestJobSettings settings) {
72  this.settings = settings;
73  }
74 
78  @Override
79  public void startUp(IngestJobContext context) throws IngestModuleException {
80  this.context = context;
81  synchronized (FilesIdentifierIngestModule.sharedResourcesLock) {
82  if (FilesIdentifierIngestModule.refCounter.incrementAndGet(context.getJobId()) == 1) {
83  // Starting up the first instance of this module for this ingest
84  // job, so get the interesting file sets definitions snapshot
85  // for the job. Note that getting this snapshot atomically via a
86  // synchronized definitions manager method eliminates the need
87  // to disable the interesting files set definition UI during ingest.
88  List<FilesSet> filesSets = new ArrayList<>();
89  try {
90  for (FilesSet set : FilesSetsManager.getInstance().getInterestingFilesSets().values()) {
91  if (settings.interestingFilesSetIsEnabled(set.getName())) {
92  filesSets.add(set);
93  }
94  }
95  } catch (FilesSetsManager.FilesSetsManagerException ex) {
96  throw new IngestModuleException(Bundle.FilesIdentifierIngestModule_getFilesError(), ex);
97  }
98  FilesIdentifierIngestModule.interestingFileSetsByJob.put(context.getJobId(), filesSets);
99  }
100  }
101  }
102 
106  @Override
107  @Messages({"FilesIdentifierIngestModule.indexError.message=Failed to index interesting file hit artifact for keyword search."})
108  public ProcessResult process(AbstractFile file) {
109  try {
110  blackboard = Case.getOpenCase().getServices().getBlackboard();
111  } catch (NoCurrentCaseException ex) {
112  logger.log(Level.SEVERE, "Exception while getting open case.", ex); //NON-NLS
113  return ProcessResult.ERROR;
114  }
115  // Skip slack space files.
116  if (file.getType().equals(TskData.TSK_DB_FILES_TYPE_ENUM.SLACK)) {
117  return ProcessResult.OK;
118  }
119 
120  // See if the file belongs to any defined interesting files set.
121  List<FilesSet> filesSets = FilesIdentifierIngestModule.interestingFileSetsByJob.get(this.context.getJobId());
122  for (FilesSet filesSet : filesSets) {
123  String ruleSatisfied = filesSet.fileIsMemberOf(file);
124  if (ruleSatisfied != null) {
125  try {
126  // Post an interesting files set hit artifact to the
127  // blackboard.
128  String moduleName = InterestingItemsIngestModuleFactory.getModuleName();
129  BlackboardArtifact artifact = file.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_INTERESTING_FILE_HIT);
130  Collection<BlackboardAttribute> attributes = new ArrayList<>();
131 
132  // Add a set name attribute to the artifact. This adds a
133  // fair amount of redundant data to the attributes table
134  // (i.e., rows that differ only in artifact id), but doing
135  // otherwise would requires reworking the interesting files
136  // set hit artifact.
137  BlackboardAttribute setNameAttribute = new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_SET_NAME, moduleName, filesSet.getName());
138  attributes.add(setNameAttribute);
139 
140  // Add a category attribute to the artifact to record the
141  // interesting files set membership rule that was satisfied.
142  BlackboardAttribute ruleNameAttribute = new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_CATEGORY, moduleName, ruleSatisfied);
143  attributes.add(ruleNameAttribute);
144 
145  artifact.addAttributes(attributes);
146  try {
147  // index the artifact for keyword search
148  blackboard.indexArtifact(artifact);
149  } catch (Blackboard.BlackboardException ex) {
150  logger.log(Level.SEVERE, "Unable to index blackboard artifact " + artifact.getArtifactID(), ex); //NON-NLS
151  MessageNotifyUtil.Notify.error(Bundle.FilesIdentifierIngestModule_indexError_message(), artifact.getDisplayName());
152  }
153 
154  services.fireModuleDataEvent(new ModuleDataEvent(moduleName, BlackboardArtifact.ARTIFACT_TYPE.TSK_INTERESTING_FILE_HIT, Collections.singletonList(artifact)));
155 
156  // make an ingest inbox message
157  StringBuilder detailsSb = new StringBuilder();
158  detailsSb.append("File: " + file.getParentPath() + file.getName() + "<br/>\n");
159  detailsSb.append("Rule Set: " + filesSet.getName());
160 
161  services.postMessage(IngestMessage.createDataMessage(InterestingItemsIngestModuleFactory.getModuleName(),
162  "Interesting File Match: " + filesSet.getName() + "(" + file.getName() +")",
163  detailsSb.toString(),
164  file.getName(),
165  artifact));
166 
167  } catch (TskCoreException ex) {
168  FilesIdentifierIngestModule.logger.log(Level.SEVERE, "Error posting to the blackboard", ex); //NOI18N NON-NLS
169  }
170  }
171  }
172  return ProcessResult.OK;
173  }
174 
178  @Override
179  public void shutDown() {
180  if (context != null) {
181  if (refCounter.decrementAndGet(this.context.getJobId()) == 0) {
182  // Shutting down the last instance of this module for this ingest
183  // job, so discard the interesting file sets definitions snapshot
184  // for the job.
185  FilesIdentifierIngestModule.interestingFileSetsByJob.remove(this.context.getJobId());
186  }
187  }
188  }
189 }

Copyright © 2012-2016 Basis Technology. Generated on: Mon May 7 2018
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