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https://github.com/Yubico/python-fido2

Provides library functionality for FIDO 2.0, including communication with a device over USB.
https://github.com/Yubico/python-fido2

fido2 webauthn yubikey

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Provides library functionality for FIDO 2.0, including communication with a device over USB.

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== python-fido2

image:https://github.com/Yubico/python-fido2/workflows/build/badge.svg["Github actions build", link="https://github.com/Yubico/python-fido2/actions"]



Provides library functionality for communicating with a FIDO device over USB as

well as verifying attestation and assertion signatures.



This library aims to support the FIDO U2F and FIDO 2 protocols for

communicating with a USB authenticator via the Client-to-Authenticator Protocol

(CTAP 1 and 2). In addition to this low-level device access, classes defined in

the `fido2.client` and `fido2.server` modules implement higher level operations

which are useful when interfacing with an Authenticator, or when implementing

WebAuthn support for a Relying Party.



For usage, see the `examples/` directory.



=== References

These links related to WebAuthn and FIDO2 can help you get started:



* Yubico WebAuthn/FIDO2 guide: https://developers.yubico.com/FIDO2/

* W3C WebAuthn specification: https://www.w3.org/TR/webauthn/

* FIDO specifications: https://fidoalliance.org/specifications/download/



=== License

This project, with the exception of the files mentioned below, is licensed

under the BSD 2-clause license.

See the _COPYING_ file for the full license text.



This project contains source code from pyu2f (https://github.com/google/pyu2f)

which is licensed under the Apache License, version 2.0.

These files are located in `fido2/hid/`.

See http://www.apache.org/licenses/LICENSE-2.0,

or the _COPYING.APLv2_ file for the full license text.



This project also bundles the public suffix list (https://publicsuffix.org)

which is licensed under the Mozilla Public License, version 2.0.

This file is stored as `fido2/public_suffix_list.dat`.

See https://mozilla.org/MPL/2.0/,

or the _COPYING.MPLv2_ file for the full license text.



=== Requirements

fido2 is compatible with Python 3.7 and later, and is tested on Windows, MacOS,

and Linux. Support for OpenBSD, FreeBSD, and NetBSD is provided as-is and

relies on community contributions.



=== Installation



fido2 is installable by running the following command:



  pip install fido2



To install the dependencies required for communication with NFC authenticators,

instead use:



  pip install fido2[pcsc]



Under Windows 10 (1903 or later) access to FIDO devices is restricted and

requires running as Administrator. This library can still be used when running

as non-administrator, via the  `fido.client.WindowsClient` class. An example of

this is included in the file `examples/credential.py`.



Under Linux you will need to add a Udev rule to be able to access the FIDO

device, or run as root. 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"

----



There may be a package already available for your distribution that does this

for you, see:

https://support.yubico.com/hc/en-us/articles/360013708900-Using-Your-U2F-YubiKey-with-Linux



Under FreeBSD you will either need to run as root or add rules for your device

to /etc/devd.conf, which can be automated by installing security/u2f-devd:



  # pkg install u2f-devd



==== Dependencies

This project depends on Cryptography. For instructions on installing this

dependency, see https://cryptography.io/en/latest/installation/.



NFC support is optionally available via PC/SC, using the pyscard library. For

instructions on installing this dependency, see

https://github.com/LudovicRousseau/pyscard/blob/master/INSTALL.md.



=== Development

For development of the library  we use https://python-poetry.org/[poetry]. To

set up the dev environment, run this command in the root directory of the

repository:



  poetry install



We also use https://pre-commit.com/[pre-commit] to run some scans on the code

prior to committing.



==== Running tests

While many tests can run on their own, some require a connected U2F or FIDO2

device to run.



  poetry run pytest