public override IEnumerable <JunkNode> FindJunk()
{
var returnList = new List <JunkNode>();
returnList.AddRange(ScanForJunk());
returnList.AddRange(ScanFirewallRules());
returnList.AddRange(ScanTracing());
returnList.AddRange(ScanClsid());
returnList.AddRange(ScanAudioPolicyConfig());
returnList.AddRange(ScanUserAssist());
returnList.AddRange(ScanAppCompatFlags());
returnList.AddRange(ScanEventLogs());
returnList.AddRange(ScanInstallerFolders());
if (Uninstaller.RegKeyStillExists())
{
var regKeyNode = new RegistryKeyJunkNode(PathTools.GetDirectory(Uninstaller.RegistryPath),
Uninstaller.RegistryKeyName, Uninstaller.DisplayName);
regKeyNode.Confidence.Add(ConfidencePart.IsUninstallerRegistryKey);
returnList.Add(regKeyNode);
}
return(returnList);
}
private IEnumerable <JunkNode> ScanTracing()
{
const string tracingKey = @"SOFTWARE\Microsoft\Tracing";
const string fullTracingKey = @"HKEY_LOCAL_MACHINE\" + tracingKey;
var results = new List <JunkNode>();
using (var key = Registry.LocalMachine.OpenSubKey(tracingKey))
{
if (key != null)
{
foreach (var subKeyName in key.GetSubKeyNames())
{
var i = subKeyName.LastIndexOf('_');
if (i <= 0)
{
continue;
}
var str = subKeyName.Substring(0, i);
var conf = GenerateConfidence(str, Path.Combine(fullTracingKey, subKeyName), 0).ToList();
if (conf.Any())
{
var node = new RegistryKeyJunkNode(fullTracingKey, subKeyName, Uninstaller.DisplayName);
node.Confidence.AddRange(conf);
results.Add(node);
}
}
}
}
return(results);
}
private IEnumerable <JunkNode> ScanRelatedKeys(IEnumerable <JunkNode> itemsToCompare)
{
var input = itemsToCompare.ToList();
var output = new List <JunkNode>();
foreach (var registryJunkNode in input)
{
var nodeName = registryJunkNode.FullName;
// Check Wow first because non-wow path will match wow path
var softwareKey = new[] { KeyLmWow, KeyCuWow, KeyLm, KeyCu }.First(
key => nodeName.StartsWith(key, StringComparison.InvariantCultureIgnoreCase));
nodeName = nodeName.Substring(softwareKey.Length + 1);
foreach (var keyToTest in SoftwareRegKeys.Except(new[] { softwareKey }))
{
var nodePath = Path.Combine(keyToTest, nodeName);
// Check if the same node exists in other root keys
var node = input.FirstOrDefault(x => PathTools.PathsEqual(x.FullName, nodePath));
if (node != null)
{
// Add any non-duplicate confidence to the existing node
node.Confidence.AddRange(registryJunkNode.Confidence.ConfidenceParts
.Where(x => !node.Confidence.ConfidenceParts.Any(x.Equals)));
}
else
{
try
{
// Check if the key acually exists
using (var nodeKey = RegistryTools.OpenRegistryKey(nodePath, false))
{
if (nodeKey != null)
{
var newNode = new RegistryKeyJunkNode(Path.GetDirectoryName(nodePath),
Path.GetFileName(nodePath), Uninstaller.DisplayName);
newNode.Confidence.AddRange(registryJunkNode.Confidence.ConfidenceParts);
output.Add(newNode);
}
}
}
catch
{
// Ignore keys that don't exist
}
}
}
}
return(output);
}
private IEnumerable <JunkNode> ScanAudioPolicyConfig()
{
var returnList = new List <JunkNode>();
if (string.IsNullOrEmpty(Uninstaller.InstallLocation))
{
return(returnList);
}
var pathRoot = Path.GetPathRoot(Uninstaller.InstallLocation);
var unrootedLocation = pathRoot.Length >= 1
? Uninstaller.InstallLocation.Replace(pathRoot, string.Empty)
: Uninstaller.InstallLocation;
if (string.IsNullOrEmpty(unrootedLocation.Trim()))
{
return(returnList);
}
using (var key = RegistryTools.OpenRegistryKey(Path.Combine(KeyCu,
@"Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore")))
{
if (key == null)
{
return(returnList);
}
foreach (var subKeyName in key.GetSubKeyNames())
{
using (var subKey = key.OpenSubKey(subKeyName))
{
if (subKey == null)
{
continue;
}
var defVal = subKey.GetValue(null) as string;
if (defVal != null &&
defVal.Contains(unrootedLocation, StringComparison.InvariantCultureIgnoreCase))
{
var junk = new RegistryKeyJunkNode(key.Name, subKeyName, Uninstaller.DisplayName);
junk.Confidence.Add(ConfidencePart.ExplicitConnection);
returnList.Add(junk);
}
}
}
}
return(returnList);
}
private IEnumerable <JunkNode> ScanEventLogs()
{
if (string.IsNullOrEmpty(Uninstaller.InstallLocation))
{
yield break;
}
using (var key = Registry.LocalMachine.OpenSubKey(
@"SYSTEM\CurrentControlSet\Services\EventLog\Application"))
{
if (key == null)
{
yield break;
}
var query = from name in key.GetSubKeyNames()
let m = MatchStringToProductName(name)
where m >= 0 && m < 3
//orderby m ascending
select name;
foreach (var result in query)
{
using (var subkey = key.OpenSubKey(result))
{
var exePath = subkey?.GetValue("EventMessageFile") as string;
if (string.IsNullOrEmpty(exePath) || !TestPathsMatchExe(exePath))
{
continue;
}
var node = new RegistryKeyJunkNode(key.Name, result, Uninstaller.DisplayName);
// Already matched names above
node.Confidence.Add(ConfidencePart.ProductNamePerfectMatch);
if (OtherUninstallers.Any(x => TestPathsMatch(x.InstallLocation, Path.GetDirectoryName(exePath))))
{
node.Confidence.Add(ConfidencePart.DirectoryStillUsed);
}
yield return(node);
}
}
}
}
private IEnumerable <JunkNode> ScanClsid()
{
var results = new List <JunkNode>();
foreach (var keyName in ClsidKeys)
{
using (var key = RegistryTools.OpenRegistryKey(keyName))
{
if (key == null)
{
continue;
}
string[] subKeyNames;
try
{
subKeyNames = key.GetSubKeyNames();
}
catch (Exception ex)
{
Console.WriteLine(ex);
continue;
}
foreach (var x in subKeyNames)
{
var subKeyName = x.TrimEnd('\"'); // For some reason GetSubKeyNames puts quotes at end sometimes
RegistryKey subKey = null;
try
{
subKey = key.OpenSubKey(Path.Combine(subKeyName, "InprocServer32"));
var path = subKey?.GetValue(null) as string;
if (string.IsNullOrEmpty(path))
{
continue;
}
path = Environment.ExpandEnvironmentVariables(path).Trim('\"');
if (!Path.IsPathRooted(path) || TestPathsMatch(WindowsDirectory, path))
{
continue;
}
if (TestPathsMatchExe(path))
{
var node = new RegistryKeyJunkNode(keyName, subKeyName, Uninstaller.DisplayName);
node.Confidence.Add(ConfidencePart.ExplicitConnection);
results.Add(node);
}
}
catch
{
// TODO better handling?
}
finally
{
subKey?.Close();
}
}
}
}
return(results);
}
private IEnumerable <JunkNode> FindJunkRecursively(RegistryKey softwareKey, int level = -1)
{
var returnList = new List <JunkNode>();
try
{
// Don't try to scan root keys
if (level > -1)
{
var keyName = Path.GetFileName(softwareKey.Name);
var keyDir = Path.GetDirectoryName(softwareKey.Name);
var confidence = GenerateConfidence(keyName, keyDir, level).ToList();
// Check if application's location is explicitly mentioned in any of the values
if (GetValueNamesSafe(softwareKey).Any(valueName => TestValueForMatches(softwareKey, valueName)))
{
confidence.Add(ConfidencePart.ExplicitConnection);
}
if (confidence.Any())
{
// TODO Add extra confidence if the key is, or will be empty after junk removal
var newNode = new RegistryKeyJunkNode(keyDir, keyName, Uninstaller.DisplayName);
newNode.Confidence.AddRange(confidence);
returnList.Add(newNode);
}
}
// Limit recursion depth
if (level <= 1)
{
foreach (var subKeyName in softwareKey.GetSubKeyNames())
{
if (KeyBlacklist.Contains(subKeyName, StringComparison.InvariantCultureIgnoreCase))
{
continue;
}
using (var subKey = softwareKey.OpenSubKey(subKeyName, false))
{
if (subKey != null)
{
returnList.AddRange(FindJunkRecursively(subKey, level + 1));
}
}
}
}
}
// Reg key invalid
catch (ArgumentException)
{
}
catch (SecurityException)
{
}
catch (ObjectDisposedException)
{
}
return(returnList);
}
