// returns false in case of FileNotFound error, otherwise throws exception
internal bool TryApplyOperation(KeyDisposition disposition, string subKeyName,
KeySecurity samDesired, KeyImplOperation operation,
Win32Api.RegWow64Options wowOptions = Win32Api.RegWow64Options.None)
{
// None is passed from Get/Set/Enum operations which does not allow user to pass wow options
// in such case we take it from the current identity
if (wowOptions == Win32Api.RegWow64Options.None)
{
wowOptions = identity_.GetWow64Mode();
}
KeyImplHolder subKey;
if (!TryGetSubKey(disposition, subKeyName, samDesired, wowOptions, out subKey))
{
return(false);
}
using (subKey)
{
// TODO: almost always the operation needs subKey name, at least for logging
// so it is constructed second time there.
// Better to pass it from here.
try
{
if (!operation(subKey.GetKeyImpl()))
{
return(false);
}
}
catch (FileNotFoundException)
{
// TODO: make all operations return false in case of FileNotFoundException
// so that this catch can be removed.
return(false);
}
}
return(true);
}
public static bool TryOpen(KeyIdentity identity, KeySecurity samDesired, out WindowsKey openedImpl)
{
if (identity.GetRegPath() == null)
{
// This works fine because baseKey is always one of the predefined
// registry keys, so its handle does not need to be duplicated
// or closed
openedImpl = new WindowsKey(identity.BaseKey, samDesired);
return(true);
}
IntPtr handle;
int result = Win32Api.RegOpenKeyEx(identity.BaseKey, identity.GetRegPath(), 0,
samDesired.Value | (Win32Api.KeySecurity)identity.GetWow64Mode(),
out handle);
openedImpl = null;
if (!Win32Exception.CheckIfFoundAndNoError(result))
{
return(false);
}
openedImpl = new WindowsKey(handle, samDesired);
return(true);
}
