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Added comments to the USB mapping class

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This commit is contained in:
Brian Carrier 2013-09-06 16:06:56 -04:00
parent d3870da587
commit b770dce14e
1 changed files with 33 additions and 8 deletions
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41
RecentActivity/src/org/sleuthkit/autopsy/recentactivity/ExtractUSB.java
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@ -36,6 +36,10 @@ import java.util.logging.Level;
import java.util.logging.Logger;
import org.sleuthkit.autopsy.coreutils.PlatformUtil;
/**
* Loads a file that maps USB IDs to names of makes and models. Uses Linux USB info.
* This should be renamed because it isn't extracting. It's just mapping IDs to names.
*/
public class ExtractUSB {
private static final Logger logger = Logger.getLogger(ExtractUSB.class.getName());
private HashMap<String, USBInfo> devices;
@ -43,7 +47,7 @@ public class ExtractUSB {
public ExtractUSB() {
try {
devices();
loadDeviceMap();
} catch (FileNotFoundException ex) {
logger.log(Level.SEVERE, "Could not find file " + DataFile + ".", ex);
devices = null;
@ -52,24 +56,39 @@ public class ExtractUSB {
}
}
/**
* Example inputs:
* Vid_XXXX&Pid_XXXX
* @param dev
* @return
*/
public USBInfo get(String dev) {
String[] dtokens = dev.split("[_&]");
String mID = dtokens[1];
String vID = dtokens[1];
String pID;
if (dtokens.length < 4 || dtokens[3].length() < 4) {
pID = mID + "0000";
pID = "0000";
} else {
pID = mID + dtokens[3];
pID = dtokens[3];
}
if (!devices.containsKey(pID)) {
String key = vID + pID;
if (!devices.containsKey(key)) {
return new USBInfo(null, null);
} else {
return devices.get(pID);
return devices.get(key);
}
}
private void devices() throws FileNotFoundException, IOException {
/**
* Reads the USB file. Syntax of file:
*
* # vendor vendor_name
* # device device_name <-- single tab
* # interface interface_name <-- two tabs
* @throws FileNotFoundException
* @throws IOException
*/
private void loadDeviceMap() throws FileNotFoundException, IOException {
devices = new HashMap<String, USBInfo>();
PlatformUtil.extractResourceToUserConfigDir(this.getClass(), DataFile);
try (Scanner dat = new Scanner(new FileInputStream(new java.io.File(PlatformUtil.getUserConfigDirectory() + File.separator + "USB_DATA.txt")))) {
@ -84,7 +103,11 @@ public class ExtractUSB {
}
String pID = vID + "0000";
USBInfo info = new USBInfo(dvc, null);
// make an entry with just the vendor ID
devices.put(pID, info);
// get the later lines that have specific products
line = dat.nextLine();
if (line.startsWith("\t")) {
while (dat.hasNext() && line.startsWith("\t")) {
@ -95,7 +118,9 @@ public class ExtractUSB {
for (int n = 2; n < tokens.length; n++) {
device += tokens[n] + " ";
}
info = new USBInfo(dvc, device);
//make an entry where the key is both the vendor and product IDs concatenated
devices.put(pID, info);
}
}