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Metadata-Version: 2.3
Name: yubihsm
Version: 3.1.1
Summary: Library for communication with a YubiHSM 2 over HTTP or USB.
License: Apache License
                                    Version 2.0, January 2004
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Author: Dain Nilsson
Author-email: <dain@yubico.com>
Requires-Python: >=3.9
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Topic :: Security :: Cryptography
Classifier: Topic :: Software Development :: Libraries
Provides-Extra: http
Provides-Extra: usb
Requires-Dist: cryptography (>=2.6,<47)
Requires-Dist: pyusb (>=1.0,<2.0) ; extra == "usb"
Requires-Dist: requests (>=2.0,<3.0) ; extra == "http"
Project-URL: Homepage, https://developers.yubico.com/YubiHSM2/
Project-URL: Repository, https://github.com/Yubico/python-yubihsm
Description-Content-Type: text/plain

== python-yubihsm

Python library and tests for the YubiHSM 2.

The current version (3.0) supports Python 3.9 and later.

Communicates with the YubiHSM 2 connector daemon, which must already be running.
It can also communicate directly with the YubiHSM 2 via USB (requires libusb).

=== License

....
Copyright 2023 Yubico AB

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

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

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
....

=== Installation

From PyPI:

 $ pip install yubihsm[http,usb]

From a source .tar.gz:

 $ pip install yubihsm-<version>.tar.gz[http,usb]

Omitting a tag from the brackets will install the library without support for
that backend, and will avoid installing unneeded dependencies.

=== Quick reference commands:
[source,python]
----
from yubihsm import YubiHsm
from yubihsm.defs import CAPABILITY, ALGORITHM
from yubihsm.objects import AsymmetricKey
from cryptography.hazmat.primitives import serialization

# Connect to the YubiHSM via the connector using the default password:
hsm = YubiHsm.connect('http://localhost:12345')
session = hsm.create_session_derived(1, 'password')

# Generate a private key on the YubiHSM for creating signatures:
key = AsymmetricKey.generate(  # Generate a new key object in the YubiHSM.
    session,                   # Secure YubiHsm session to use.
    0,                         # Object ID, 0 to get one assigned.
    'My key',                  # Label for the object.
    1,                         # Domain(s) for the object.
    CAPABILITY.SIGN_ECDSA,     # Capabilities for the object, can have multiple.
    ALGORITHM.EC_P256          # Algorithm for the key.
)

# pub_key is a cryptography.io ec.PublicKey, see https://cryptography.io
pub_key = key.get_public_key()

# Write the public key to a file:
with open('public_key.pem', 'wb') as f:
    f.write(pub_key.public_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PublicFormat.SubjectPublicKeyInfo
    ))

# Sign some data:
signature = key.sign_ecdsa(b'Hello world!')  # Create a signature.

# Clean up:
session.close()
hsm.close()
----

=== Development
This project uses https://docs.astral.sh/uv/[uv] for development.
Follow the uv Getting Started guide to install and configure it.

When `uv` is installed and configured you can set up the dev environment for this project by running the following command in the root directory of the repository:

  $ uv sync --all-extras

==== Pre-commit checks
This project uses https://pre-commit.com to run several checks on the code
prior to committing. To enable the hooks, run these commands in the root
directory of the repository:

  $ uv tool install pre-commit
  $ pre-commit install

Once the hooks are installed, they will run automatically on any changed files
when committing. To run the hooks against all files in the repository, run:

  $ pre-commit run --all-files

==== Running tests
Running the tests require a YubiHSM2 to run against, with the default
authentication key enabled (as is the case after performing a factory reset).

WARNING: The YubiHSM under test will be factory reset by the tests!

 $ uv run pytest

See pytest documentation for instructions on running a specific test.

By default the tests will connect to a yubihsm-connector running with the
default settings on http://localhost:12345. To change this, use the `--backend`
argument, eg:

 $ uv run pytest --backend "yhusb://"

Access to the device requires proper permissions, so either use sudo or setup a
udev rule. Sample udev configuration can be found
link:https://developers.yubico.com/YubiHSM2/Component_Reference/yubihsm-connector/[here].

==== Generating HTML documentation

To build the HTML documentation, run:

 $ uv run make -C docs/ html

The resulting output will be in docs/_build/html/.

==== Source releases for distribution
Build a source release:

 $ uv build

The resulting .tar.gz and .whl will be created in `dist/`.