Skip to main content

Abstractable XOR-based threshold secret sharing implementation in pure-Python.

Project description

Abstractable XOR-based threshold secret sharing implementation in pure-Python.

PyPI version and link. Read the Docs documentation status. GitHub Actions status. Coveralls test coverage summary.

Purpose

This library provides functions and data structures for computing secret shares given an integer input value and for reassembling an integer from its corresponding secret shares. Unlike Shamir’s Secret Sharing scheme, the XOR-based scheme this library implements does not require any Lagrange interpolation or even finite fields! Reconstruction is as simple as _t_ group operations - no commutivity necessary!

Installation and Usage

This library is available as a package on PyPI:

python -m pip install xors

The library can be imported in the usual way:

import xors

Examples

The library provides functions for transforming a nonnegative integer value into a number of secret shares and for reassembling those shares back into the value they represent:

>>> ss = xors.shares(123, quantity=3)
>>> len(ss)
3
>>> xors.interpolate(ss)
123
>>> ss = xors.shares(456, quantity=20, modulus=15485867, threshold=10)
>>> xors.interpolate(ss[5:15], threshold=10)
456

Addition of shares and multiplication of shares by a scalar are both supported:

>>> (r, s, t) = xors.shares(123, 3)
>>> (u, v, w) = xors.shares(456, 3)
>>> xors.interpolate([r + u, s + v, t + w])
579
>>> (r, s, t) = xors.shares(123, 3)
>>> r = r * 2
>>> s = s * 2
>>> t = t * 2
>>> xors.interpolate([r, s, t])
246

Development

All installation and development dependencies are fully specified in pyproject.toml. The project.optional-dependencies object is used to specify optional requirements for various development tasks. This makes it possible to specify additional options (such as docs, lint, and so on) when performing installation using pip:

python -m pip install .[docs,lint]

Documentation

The documentation can be generated automatically from the source files using Sphinx:

python -m pip install .[docs]
cd docs
sphinx-apidoc -f -E --templatedir=_templates -o _source .. && make html

Testing and Conventions

All unit tests are executed and their coverage is measured when using pytest (see the pyproject.toml file for configuration details):

python -m pip install .[test]
python -m pytest -W ignore::UserWarning

Alternatively, all unit tests are included in the module itself and can be executed using doctest:

python src/xors/xors.py -v

Style conventions are enforced using Pylint:

python -m pip install .[lint]
python -m pylint src/xors

Contributions

In order to contribute to the source code, open an issue or submit a pull request on the GitHub page for this library.

Versioning

Beginning with version 1.0.0, the version number format for this library and the changes to the library associated with version number increments conform with Semantic Versioning 2.0.0.

Publishing

This library can be published as a package on PyPI by a package maintainer. First, install the dependencies required for packaging and publishing:

python -m pip install .[publish]

Ensure that the correct version number appears in pyproject.toml, and that any links in this README document to the Read the Docs documentation of this package (or its dependencies) have appropriate version numbers. Also ensure that the Read the Docs project for this library has an automation rule that activates and sets as the default all tagged versions. Create and push a tag for this version (replacing ?.?.? with the version number):

git tag ?.?.?
git push origin ?.?.?

Remove any old build/distribution files. Then, package the source into a distribution archive:

rm -rf build dist src/*.egg-info
python -m build --sdist --wheel .

Finally, upload the package distribution archive to PyPI:

python -m twine upload dist/*

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

xors-0.0.0.tar.gz (4.6 kB view details)

Uploaded Source

File details

Details for the file xors-0.0.0.tar.gz.

File metadata

  • Download URL: xors-0.0.0.tar.gz
  • Upload date:
  • Size: 4.6 kB
  • Tags: Source
  • Uploaded using Trusted Publishing? No
  • Uploaded via: twine/4.0.1 CPython/3.9.16

File hashes

Hashes for xors-0.0.0.tar.gz
Algorithm Hash digest
SHA256 76e0e1c6657629314e9da64828343d2ac80302ae72d73d74b183c0d29c1c8d2e
MD5 51c178944444ea710046548a045d6bae
BLAKE2b-256 a46b4fc4701455c0c782eea04cd6b7d38e57c252ac8330166132becc6622b30e

See more details on using hashes here.

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page