/*
* 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.modules.android;
import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;
import java.util.logging.Level;
import org.apache.commons.codec.binary.Base64;
import org.sleuthkit.autopsy.casemodule.Case;
import org.sleuthkit.autopsy.coreutils.Logger;
import org.sleuthkit.autopsy.datamodel.ContentUtils;
import org.sleuthkit.datamodel.AbstractFile;
import org.sleuthkit.datamodel.BlackboardArtifact;
import org.sleuthkit.datamodel.BlackboardAttribute;
import org.sleuthkit.datamodel.SleuthkitCase;
import org.sleuthkit.datamodel.TskCoreException;
class TangoMessageAnalyzer {
private static final String moduleName = AndroidModuleFactory.getModuleName();
private static final Logger logger = Logger.getLogger(TangoMessageAnalyzer.class.getName());
public static void findTangoMessages() {
List<AbstractFile> absFiles;
try {
SleuthkitCase skCase = Case.getCurrentCase().getSleuthkitCase();
absFiles = skCase.findAllFilesWhere("name ='tc.db' "); //get exact file names
for (AbstractFile abstractFile : absFiles) {
try {
File jFile = new File(Case.getCurrentCase().getTempDirectory(), abstractFile.getName());
ContentUtils.writeToFile(abstractFile, jFile);
findTangoMessagesInDB(jFile.toString(), abstractFile);
} catch (Exception e) {
logger.log(Level.SEVERE, "Error parsing Tango messages", e);
}
}
} catch (TskCoreException e) {
logger.log(Level.SEVERE, "Error finding Tango messages", e);
}
}
private static void findTangoMessagesInDB(String DatabasePath, AbstractFile f) {
Connection connection = null;
ResultSet resultSet = null;
Statement statement = null;
if (DatabasePath == null || DatabasePath.isEmpty()) {
return;
}
try {
Class.forName("org.sqlite.JDBC"); //load JDBC driver
connection = DriverManager.getConnection("jdbc:sqlite:" + DatabasePath);
statement = connection.createStatement();
} catch (ClassNotFoundException | SQLException e) {
logger.log(Level.SEVERE, "Error opening database", e);
return;
}
try {
resultSet = statement.executeQuery(
"Select conv_id, create_time,direction,payload FROM messages ORDER BY create_time DESC;");
String conv_id; // seems to wrap around the message found in payload after decoding from base-64
String direction; // 1 incoming, 2 outgoing
String payload; // seems to be a base64 message wrapped by the conv_id
while (resultSet.next()) {
conv_id = resultSet.getString("conv_id");
Long create_time = Long.valueOf(resultSet.getString("create_time")) / 1000;
if (resultSet.getString("direction").equals("1")) {
direction = "Incoming";
} else {
direction = "Outgoing";
}
payload = resultSet.getString("payload");
BlackboardArtifact bba = f.newArtifact(BlackboardArtifact.ARTIFACT_TYPE.TSK_MESSAGE); //create a call log and then add attributes from result set.
bba.addAttribute(new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_DATETIME.getTypeID(), moduleName, create_time));
bba.addAttribute(new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_DIRECTION.getTypeID(), moduleName, direction));
bba.addAttribute(new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_TEXT.getTypeID(), moduleName, decodeMessage(conv_id, payload)));
bba.addAttribute(new BlackboardAttribute(BlackboardAttribute.ATTRIBUTE_TYPE.TSK_MESSAGE_TYPE.getTypeID(), moduleName, "Tango Message"));
}
} catch (Exception e) {
logger.log(Level.SEVERE, "Error parsing Tango messages to the Blackboard", e);
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
statement.close();
connection.close();
} catch (Exception e) {
logger.log(Level.SEVERE, "Error closing database", e);
}
}
}
//take the message string which is wrapped by a certain string, and return the text enclosed.
private static String decodeMessage(String wrapper, String message) {
String result = "";
byte[] decoded = Base64.decodeBase64(message);
try {
String Z = new String(decoded, "UTF-8");
result = Z.split(wrapper)[1];
} catch (Exception e) {
logger.log(Level.SEVERE, "Error decoding a Tango message", e);
}
return result;
}
}