public IPolicyXml GetExistingPolicySetXml(string filename)
{
Stream inputStream = OpenPolicyFileStream(filename, out m_bDecryptXML);
using (inputStream)
{
ZipFileReader zipfile = null;
try
{
zipfile = new ZipFileReader(inputStream);
ZipEntry zipEntry = zipfile.GetEntry("properties.xml");
if (zipEntry == null)
{
Logger.LogError("Failed to find the properties file in " + filename + " - this is not a valid policy set file.");
return null;
}
return ReadPolicyFile(zipfile, ReadEntry(zipfile, zipEntry));
}
catch
{
Logger.LogError("Ignoring " + filename + " - Itdoes not appear to be a valid policy file.");
}
finally
{
if (zipfile != null)
zipfile.Close();
}
}
return null;
}
private IPolicyXml ReadPolicyFile(ZipFileReader zipfile, string properties)
{
XmlDocument xmlDoc = new XmlDocument();
if (m_bDecryptXML)
properties = Crypto.Instance.DecryptXml(properties);
xmlDoc.LoadXml(properties);
try
{
XmlNode Root = xmlDoc.SelectSingleNode(@"/PolicyProperties");
if (Root.Attributes["type"] != null)
{
string type = Root.Attributes.GetNamedItem("type").Value;
m_runtimeType = string.Compare(type, "COMPILED") == 0;
}
}
catch (Exception ex)
{
Logger.LogError("Unable to retrieve policy file type from policy file");
Logger.LogError(ex);
m_runtimeType = false;
}
XmlNode latestVersionNode = xmlDoc.SelectSingleNode(@"/PolicyProperties/LatestVersion");
string latestVersion = latestVersionNode.InnerXml;
XmlNodeList versionNodes = xmlDoc.SelectNodes(@"/PolicyProperties/Versions/Version");
foreach (XmlNode versionNode in versionNodes)
{
string version = versionNode.Attributes.GetNamedItem("name").Value;
string entry = version + "/policysetversion.xml";
ZipEntry zipEntry = zipfile.GetEntry(entry);
if (zipEntry == null)
{
if (version == latestVersion)
Logger.LogError(@"Failed to find the policy set file - this is not a valid policy set file.");
continue;
}
return zipfile.ReadEntry(entry, m_encoding);
}
return null;
}
public PolicyXml(string path, ZipFileReader zipFile)
{
Path = path;
m_zipFile = zipFile;
}