private void ScanDir(string path)
{ // uses the file scan to scan all files in a directory and its sub-directories
List <string> viruses = new List <string>();
foreach (string file in Directory.GetFiles(path, "*.pdf", SearchOption.AllDirectories))
{
if (ScanFile(file))
{
viruses.Add(file);
}
}
if (viruses.Count == 0)
{
MessageBox.Show("All clear!");
}
else
{
MessageBox.Show(String.Format("{0} viruses found!", viruses.Count));
foreach (string virus in viruses)
{
if (SettingsBox.GetItemChecked(NOTIFY_ID))
{
MessageBox.Show(virus);
}
}
}
}
private bool ScanFile(string path)
{// operation for scanning a file
if (Path.GetExtension(path) == ".pdf")
{
try
{
PdfDocument file = PdfReader.Open(path);
PdfReference nextReference = (PdfReference)file.Internals.Catalog.Elements["/OpenAction"];
if (nextReference == null)
{
return(false);
}
PdfDictionary action = (PdfDictionary)nextReference.Value;
if (action == null)
{
return(false);
}
do
{
foreach (string pattern in openActionBlacklist)
{
if (SettingsBox.GetItemChecked(SUSPICIOUS_ID) ||
Regex.Match(action.ToString(), pattern).Success)
{
if (SettingsBox.GetItemChecked(REMOVE_ID))
{
File.Delete(path);
}
return(true);
}
}
} // a joke line which basicly iterates over the linked list of open actions
while ((nextReference = (PdfReference)action.Elements["/Next"]) == null || (action = (PdfDictionary)nextReference.Value) == null);
}
catch (UnauthorizedAccessException)
{
MessageBox.Show(String.Format("couldn't handle {0}. Try to rerun as administrator.", path));
}
catch (Exception)
{
MessageBox.Show(String.Format("{0} is corrupted. Readers may handle it but it prevents us from scanning it fully.", path));
}
}
return(false);
}
