ge25519

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

Purpose

This library provides a native Python implementation of Ed25519 group 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 group 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 ge25519

The library can be imported in the usual manner:

import ge25519
from ge25519 import *

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_ge25519.py

Style conventions are enforced using Pylint:

python -m pip install ".[lint]"
python -m pylint src/ge25519 test/test_ge25519.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 via the GitHub Actions workflow found in .github/workflows/build-publish-sign-release.yml that follows the recommendations found in the Python Packaging User Guide.

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.

To publish the package, create and push a tag for the version being published (replacing ?.?.? with the version number):

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

Metadata

Release files for ge25519 2.0.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for ge25519 2.0.0
File	Size	Uploaded
ge25519-2.0.0.tar.gz	51.5 kB	Sep 21, 2025	Details

Built distribution (wheel)

Table of built distributions (wheels) for ge25519 2.0.0
File	Interpreter	ABI	Platform	Reset
ge25519-2.0.0-py3-none-any.whl 46.4 kB Sep 21, 2025	Python 3	none	any	Details

Total release size: 97.9 kB

Release files / ge25519-2.0.0.tar.gz

Download URL	ge25519-2.0.0.tar.gz
Size	51.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`7aa76ec359cc1cc88c22f8735c0d598367e8a90b1c43014b8609bd68962f9aea`
BLAKE2b-256 checksum How to use checksums	`3b0925b243ba4ad356a15182d1935d0b044da2ad8129a55aa29ef66584a62e8c`
Upload date	Sep 21, 2025
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/nthparty/ge25519
Publishing commit: github.com/nthparty/ge25519/tree/8009c8028c5f67c1a1acae84db98e47938ce1ac8

Workflow

Publishing configuration: github.com/nthparty/ge25519/blob/8009c8028c5f67c1a1acae84db98e47938ce1ac8/.github/workflows/build-publish-sign-release.yml
Publishing logs: github.com/nthparty/ge25519/actions/runs/17890304163/attempts/1

Artifact

Subject: ge25519-2.0.0.tar.gz
SHA-256 checksum: 7aa76ec359cc1cc88c22f8735c0d598367e8a90b1c43014b8609bd68962f9aea Verifying attestations

Release files / ge25519-2.0.0-py3-none-any.whl

Download URL	ge25519-2.0.0-py3-none-any.whl
Size	46.4 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`1c7998172bd3282828dacf9062a49649cfdbb5a928551958cff1ad7546969eab`
BLAKE2b-256 checksum How to use checksums	`6e9cca79a952cd851dfe32cef54574e1addb57154fe4d09d309a5bcd5c91d60f`
Upload date	Sep 21, 2025
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/nthparty/ge25519
Publishing commit: github.com/nthparty/ge25519/tree/8009c8028c5f67c1a1acae84db98e47938ce1ac8

Workflow

Publishing configuration: github.com/nthparty/ge25519/blob/8009c8028c5f67c1a1acae84db98e47938ce1ac8/.github/workflows/build-publish-sign-release.yml
Publishing logs: github.com/nthparty/ge25519/actions/runs/17890304163/attempts/1

Artifact

Subject: ge25519-2.0.0-py3-none-any.whl
SHA-256 checksum: 1c7998172bd3282828dacf9062a49649cfdbb5a928551958cff1ad7546969eab Verifying attestations