Clone this repo:
  1. 3031bf5 Do not include arbitrary files in wheel by Michał Górny · 10 weeks ago main
  2. c373662 Bumped version to 4.9-dev0 by Sybren A. Stüvel · 10 weeks ago
  3. 681b256 Fix by Sybren A. Stüvel · 10 weeks ago
  4. 3b31182 Remove overlapping slots from AbstractKey subclasses by Arie Bovenberg · 10 weeks ago
  5. 6391b1a Fix #194: Remove debug logging from `rsa/` by Sybren A. Stüvel · 10 weeks ago

Pure Python RSA implementation

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Python-RSA is a pure-Python RSA implementation. It supports encryption and decryption, signing and verifying signatures, and key generation according to PKCS#1 version 1.5. It can be used as a Python library as well as on the commandline. The code was mostly written by Sybren A. Stüvel.

Documentation can be found at the Python-RSA homepage. For all changes, check the changelog.

Download and install using:

pip install rsa

or download it from the Python Package Index.

The source code is maintained at GitHub and is licensed under the Apache License, version 2.0


Because of how Python internally stores numbers, it is very hard (if not impossible) to make a pure-Python program secure against timing attacks. This library is no exception, so use it with care. See for more info.

Setup of Development Environment

python3 -m venv .venv
. ./.venv/bin/activate
pip install poetry
poetry install

Publishing a New Release

. ./.venv/bin/activate
poetry publish --build