public bool Handle(WindowsKey key)
{
if (!KeyIdentity.IsPredefined(key.Handle))
{
return Win32Exception.CheckIfFoundAndNoError(
Win32Api.NtQueryKey(key.Handle, KeyInformationClass_, KeyInformation_, Length_,
out ResultLength_));
}
// Predefined key handle values are valid only on the advapi32.dll level
// on the ntdll.dll level we have to replace them with appropriate ntdll.dll handles
IntPtr hNtKey = IntPtr.Zero;
string objectName = KeyIdentity.GetSystemBasePath(key.Handle);
Win32Api.UNICODE_STRING usObjectName = new Win32Api.UNICODE_STRING();
usObjectName.Length = unchecked((ushort)(sizeof(char) * objectName.Length));
usObjectName.MaximumLength = usObjectName.Length;
using (HGlobalPtr pObjectNameBuffer = new HGlobalPtr(Marshal.StringToHGlobalUni(objectName)))
{
usObjectName.Buffer = pObjectNameBuffer.Ptr;
using (HGlobalPtr pObjectName = new HGlobalPtr(Marshal.SizeOf(typeof(Win32Api.UNICODE_STRING))))
{
Marshal.StructureToPtr(usObjectName, pObjectName.Ptr, false);
Win32Api.OBJECT_ATTRIBUTES oa = new Win32Api.OBJECT_ATTRIBUTES();
oa.Length = unchecked((uint)Marshal.SizeOf(typeof(Win32Api.OBJECT_ATTRIBUTES)));
oa.RootDirectory = IntPtr.Zero;
oa.ObjectName = pObjectName.Ptr;
oa.Attributes = (uint)Win32Api.ObjectAttributes.OBJ_CASE_INSENSITIVE;
oa.SecurityDescriptor = IntPtr.Zero;
oa.SecurityQualityOfService = IntPtr.Zero;
using (HGlobalPtr pOA = new HGlobalPtr(Marshal.SizeOf(typeof(Win32Api.OBJECT_ATTRIBUTES))))
{
Marshal.StructureToPtr(oa, pOA.Ptr, false);
if (!Win32Exception.CheckIfFoundAndNoError(
Win32Api.NtOpenKey(out hNtKey, (uint)Win32Api.KeySecurity.KEY_QUERY_VALUE, pOA.Ptr)))
{
return false;
}
try
{
return Win32Exception.CheckIfFoundAndNoError(
Win32Api.NtQueryKey(hNtKey, KeyInformationClass_, KeyInformation_, Length_,
out ResultLength_));
}
finally
{
Win32Api.NtClose(hNtKey);
}
}
}
}
}
internal void BaseKeyCopied(IntPtr baseKey)
{
if (KeyIdentity.IsPredefined(baseKey))
{
return;
}
Int64 key = baseKey.ToInt64();
lock (this)
{
if (!baseKeyRefCount_.ContainsKey(key))
{
baseKeyRefCount_[key] = 0;
}
baseKeyRefCount_[key]++;
}
}
internal void BaseKeyClosed(IntPtr baseKey)
{
if (KeyIdentity.IsPredefined(baseKey))
{
return;
}
Int64 key = baseKey.ToInt64();
lock (this)
{
baseKeyRefCount_[key]--;
if (baseKeyRefCount_[key] == 0)
{
baseKeyRefCount_.Remove(key);
Win32Exception.CheckResult(Win32Api.RegCloseKey(baseKey));
}
}
}