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== libfido2 image:https://github.com/yubico/libfido2/workflows/linux/badge.svg["Linux Build Status (github actions)", link="https://github.com/Yubico/libfido2/actions"] image:https://github.com/yubico/libfido2/workflows/macos/badge.svg["macOS Build Status (github actions)", link="https://github.com/Yubico/libfido2/actions"] image:https://github.com/yubico/libfido2/workflows/windows/badge.svg["Windows Build Status (github actions)", link="https://github.com/Yubico/libfido2/actions"] image:https://github.com/yubico/libfido2/workflows/fuzzer/badge.svg["Fuzz Status (github actions)", link="https://github.com/Yubico/libfido2/actions"] image:https://oss-fuzz-build-logs.storage.googleapis.com/badges/libfido2.svg["Fuzz Status (oss-fuzz)", link="https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:libfido2"] *libfido2* provides library functionality and command-line tools to communicate with a FIDO device over USB or NFC, and to verify attestation and assertion signatures. *libfido2* supports the FIDO U2F (CTAP 1) and FIDO2 (CTAP 2) protocols. For usage, see the `examples/` directory. === License *libfido2* is licensed under the BSD 2-clause license. See the LICENSE file for the full license text. === Supported Platforms *libfido2* is known to work on Linux, macOS, Windows, OpenBSD, and FreeBSD. === Documentation Documentation is available in troff and HTML formats. An https://developers.yubico.com/libfido2/Manuals/[online mirror of *libfido2*'s documentation] is also available. === Bindings * .NET: https://github.com/borrrden/Fido2Net[Fido2Net] * Go: https://github.com/keys-pub/go-libfido2[go-libfido2] * Perl: https://github.com/jacquesg/p5-FIDO-Raw[p5-FIDO-Raw] * Rust: https://github.com/PvdBerg1998/libfido2[libfido2] === Releases The current release of *libfido2* is 1.13.0. Signed release tarballs are available at Yubico's https://developers.yubico.com/libfido2/Releases[release page]. === Dependencies *libfido2* depends on https://github.com/pjk/libcbor[libcbor], https://www.openssl.org[OpenSSL] 1.1 or newer, and https://zlib.net[zlib]. On Linux, libudev (part of https://www.freedesktop.org/wiki/Software/systemd[systemd]) is also required. === Installation ==== Fedora 35 and 34 $ sudo dnf install libfido2 libfido2-devel fido2-tools ==== Ubuntu 22.04 (Jammy) and 20.04 (Focal) $ sudo apt install libfido2-1 libfido2-dev libfido2-doc fido2-tools Alternatively, newer versions of *libfido2* are available in Yubico's PPA. Follow the instructions for Ubuntu 18.04 (Bionic) below. ==== Ubuntu 18.04 (Bionic) $ sudo apt install software-properties-common $ sudo apt-add-repository ppa:yubico/stable $ sudo apt update $ sudo apt install libfido2-1 libfido2-dev libfido2-doc fido2-tools On Linux, you may need to add a udev rule to be able to access the FIDO device. For example, the udev rule may contain the following: ---- #udev rule for allowing HID access to Yubico devices for FIDO support. KERNEL=="hidraw*", SUBSYSTEM=="hidraw", \ MODE="0664", GROUP="plugdev", ATTRS{idVendor}=="1050" ---- ==== macOS $ brew install libfido2 ==== Windows Please consult Yubico's https://developers.yubico.com/libfido2/Releases[release page] for ARM, ARM64, Win32, and Win64 artefacts. === Building from source On UNIX-like systems: $ cmake -B build $ make -C build $ sudo make -C build install Depending on the platform, https://www.freedesktop.org/wiki/Software/pkg-config/[pkg-config] may need to be installed, or the PKG_CONFIG_PATH environment variable set. For complete, OS-specific build instructions, please refer to the `.actions/` (Linux, macOS, BSD) and `windows/` directories. === Build-time Customisation *libfido2* supports a number of CMake options. Some of the options require additional dependencies. Options that are disabled by default are not officially supported. [%autowidth.stretch] |=== |*Option* |*Description* |*Default* | BUILD_EXAMPLES | Build example programs | ON | BUILD_MANPAGES | Build man pages | ON | BUILD_SHARED_LIBS | Build a shared library | ON | BUILD_STATIC_LIBS | Build a static library | ON | BUILD_TOOLS | Build auxiliary tools | ON | FUZZ | Enable fuzzing instrumentation | OFF | NFC_LINUX | Enable netlink NFC support on Linux | ON | USE_HIDAPI | Use hidapi as the HID backend | OFF | USE_PCSC | Enable experimental PCSC support | OFF | USE_WINHELLO | Abstract Windows Hello as a FIDO device | ON |=== The USE_HIDAPI option requires https://github.com/libusb/hidapi[hidapi]. The USE_PCSC option requires https://github.com/LudovicRousseau/PCSC[pcsc-lite] on Linux. === Development Please use https://github.com/Yubico/libfido2/discussions[GitHub Discussions] to ask questions and suggest features, and https://github.com/Yubico/libfido2/pulls[GitHub pull-requests] for code contributions. === Reporting bugs Please use https://github.com/Yubico/libfido2/issues[GitHub Issues] to report bugs. To report security issues, please contact security@yubico.com. A PGP public key can be found at https://www.yubico.com/support/security-advisories/issue-rating-system/.