pkcs11 interop GetSlotList(SlotsType.WithTokenPresent); returns empty list

Question

I am using pkcs11 interop library to list available devices like this

using (Pkcs11 pkcs11 = new Pkcs11(_libraryPath, AppType.SingleThreaded))
{
    List<Slot> slots =  pkcs11.GetSlotList(SlotsType.WithTokenPresent);
    //using slots
}

it works fine but when i use same code in web application or run it loop i am getting slots count as 0 even if device is connected.

Answer 1

What is the PKCS#11 library? Does it happen to be for a network-based device or one what has a corresponding service on the box? I suspect you do not have permissions to LPC/RPC to its corresponding server.