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fe25519

Pure-Python data structure for working with Ed25519 (and Ristretto) field elements and operations.

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

Purpose

This library provides a native Python implementation of Ed25519 field elements and a number of operations over them. The library makes it possible to fill gaps in application prototypes that may have specific limitations with respect to their operating environment or their ability to rely on non-Python dependencies.

The implementation is based upon and is compatible with the corresponding implementation of Ed25519 and Ristretto field elements used in libsodium. For more information and background about the underlying mathematical structures and primitives, consult materials about Curve25519, the Ristretto group, and the related Ed25519 system.

Installation and Usage

This library is available as a package on PyPI:

python -m pip install fe25519

The library can be imported in the usual ways:

import fe25519
from fe25519 import fe25519

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

Concise unit tests are implemented with the help of fountains; new reference specifications for these tests can be generated by running the testing module directly:

python test/test_fe25519.py

Style conventions are enforced using Pylint:

python -m pip install .[lint]
python -m pylint src/fe25519 test/test_fe25519.py

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 0.1.0, 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/*