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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/sybrenstuvel/python-rsa) [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. Stüvel. Documentation can be found at the [Python-RSA homepage](https://stuvel.eu/rsa). 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) Changes in 4.1-4.4 ------------------ Version 4.1 dropped support for Python 2.7, and soon after that version 4.2 was released. Neither of the two made it explicit in `setup.cfg` that Python 3.5 or newer is required. This caused issues on Python 2.7, as Pip happily upgraded to the new version. Version 4.3 is a re-tagged release of version 4.0. It is the last to support Python 2.7. Version 4.4 will be a re-tagged release of version 4.2, and explicitly require Python 3.5 or newer. 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.