From https://github.com/Yubico/libfido2:
> libfido2 provides library functionality and command-line tools to communicate with a FIDO device over USB, and to verify attestation and assertion signatures.
>
> libfido2 supports the FIDO U2F (CTAP 1) and FIDO 2.0 (CTAP 2) protocols.
libfido2 will be used by ssh to support FIDO/U2F keys. It is currently intended only for use by ssh, and so is installed as a PRIVATELIB and is placed in the ssh pkgbase package.
This is currently disabled for the 32-bit library build as libfido2 is not compatible with the COMPAT_32BIT hack in usb_ioctl.h, and there is no need for libcbor without libfido2.