Add Support for OnlyKey

[whinis]

// New fuction available in yubikey-personalization version >= 1.20.0 that allows
// selecting device VID/PID (yk_open_key_vid_pid) if Yubikey was not found
if (m_yk == nullptr) {
static const int device_pids[] = {0x60fc}; // OnlyKey PID
m_yk_void = static_cast<void*>(yk_open_key_vid_pid(0x1d50, device_pids, 1, 0));
m_onlyKey = true;
}

View thread at brush701#41

[frgomes]

Hello, have you got OnlyKey working?

I have a Feitian security key which I'd like to add support to.
https://www.ftsafe.com/download/webdownload/ePass%20FIDO-Multi-Interface%20Manual.pdf

Any hint you could provide is highly appreciated.
Thanks

[whinis]

I never received an OnlyKey so I am unsure. I will look into what Feitian key will require but without one it will be hard to confirm

[whinis]

@frgomes It doesn't appear that the Feitian security key supports challeneges in the same way OnlyKey and Yubikey does so you would need to use something like smart card plugins instead.