/// <summary>
/// Map the file to SecurityZone using urlmon.dll, depending on 'IInternetSecurityManager::MapUrlToZone'.
/// </summary>
private static SecurityZone MapSecurityZoneWithUrlmon(string filePath)
{
uint zoneId;
object curSecMgr = null;
const UInt32 MUTZ_DONT_USE_CACHE = 0x00001000;
int hr = NativeMethods.CoInternetCreateSecurityManager(null, out curSecMgr, 0);
if (hr != NativeMethods.S_OK)
{
// Returns an error value if it's not S_OK
throw new System.ComponentModel.Win32Exception(hr);
}
try
{
NativeMethods.IInternetSecurityManager ism = (NativeMethods.IInternetSecurityManager)curSecMgr;
hr = ism.MapUrlToZone(filePath, out zoneId, MUTZ_DONT_USE_CACHE);
if (hr == NativeMethods.S_OK)
{
SecurityZone result;
return(LanguagePrimitives.TryConvertTo(zoneId, out result) ? result : SecurityZone.NoZone);
}
return(SecurityZone.NoZone);
}
finally
{
if (curSecMgr != null)
{
Marshal.ReleaseComObject(curSecMgr);
}
}
}
internal static int MapUrlToZoneWrapper(Uri uri)
{
int targetZone = NativeMethods.URLZONE_LOCAL_MACHINE; // fail securely this is the most priveleged zone
int hr = NativeMethods.S_OK;
object curSecMgr = null;
hr = NativeMethods.CoInternetCreateSecurityManager(
null,
out curSecMgr,
0);
if (NativeMethods.Failed(hr))
{
throw new Win32Exception(hr);
}
NativeMethods.IInternetSecurityManager pSec = (NativeMethods.IInternetSecurityManager)curSecMgr;
string uriString = BindUriHelper.UriToString(uri);
//
// special case the condition if file is on local machine or UNC to ensure that content with mark of the web
// does not yield with an internet zone result
//
if (uri.IsFile)
{
pSec.MapUrlToZone(uriString, out targetZone, NativeMethods.MUTZ_NOSAVEDFILECHECK);
}
else
{
pSec.MapUrlToZone(uriString, out targetZone, 0);
}
//
// This is the condition for Invalid zone
//
if (targetZone < 0)
{
throw new SecurityException("The URI specified is invalid.");
}
pSec = null;
curSecMgr = null;
return(targetZone);
}