| Pure Python RSA implementation |
| ============================== |
| |
| [](https://pypi.org/project/rsa/) |
| [](https://travis-ci.org/sybrenstuvel/python-rsa) |
| [](https://coveralls.io/github/sybrenstuvel/python-rsa?branch=master) |
| [](https://codeclimate.com/github/codeclimate/codeclimate/maintainability) |
| |
| [Python-RSA](https://stuvel.eu/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. StΓΌvel. |
| |
| Documentation can be found at the [Python-RSA homepage](https://stuvel.eu/rsa). For all changes, check [the changelog](https://github.com/sybrenstuvel/python-rsa/blob/master/CHANGELOG.md). |
| |
| Download and install using: |
| |
| pip install rsa |
| |
| or download it from the [Python Package Index](https://pypi.org/project/rsa/). |
| |
| The source code is maintained at [GitHub](https://github.com/sybrenstuvel/python-rsa/) and is |
| licensed under the [Apache License, version 2.0](https://www.apache.org/licenses/LICENSE-2.0) |
| |
| Security |
| -------- |
| |
| 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 https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python/ for more info. |
| |
| |
| Major changes in 4.1 |
| -------------------- |
| |
| Version 4.0 was the last version to support Python 2 and 3.4. Version 4.1 is compatible with Python 3.5+ only. |
| |
| |
| Major changes in 4.0 |
| -------------------- |
| |
| Version 3.4 was the last version in the 3.x range. Version 4.0 drops the following modules, |
| as they are insecure: |
| |
| - `rsa._version133` |
| - `rsa._version200` |
| - `rsa.bigfile` |
| - `rsa.varblock` |
| |
| Those modules were marked as deprecated in version 3.4. |
| |
| Furthermore, in 4.0 the I/O functions is streamlined to always work with bytes on all |
| supported versions of Python. |
| |
| Version 4.0 drops support for Python 2.6 and 3.3. |
