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.
For usage, see the examples/ directory.
libfido2 is licensed under the BSD 2-clause license. See the LICENSE file for the full license text.
Documentation is available in troff and HTML formats. An online mirror of libfido2's documentation is also available.