oscrypto

TLS (SSL) sockets, key generation, encryption, decryption, signing, verification and KDFs using the OS crypto libraries. Does not require a compiler, and relies on the OS for patching. Works on Windows, OS X and Linux/BSD.

oscrypto Permissive license MIT Active ★ 340 v1.3.0 released 2022-03-18

Install

oscrypto on PyPI

pip

pip install oscrypto

uv

uv add oscrypto

poetry

poetry add oscrypto

Package facts

License	MIT (permissive)
Python support	not specified
Install friction	low — pure-Python wheel
Runtime dependencies	1 — asn1crypto
Maintenance	actively maintained — 1,609 days since the last release
Last repo commit	2026-07-17
First released	2015-10-27
Popularity	one of the top 1,000 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: oscrypto-1.3.0-py2.py3-none-any.whl

Keywords: crypto, pki, tls, ssl, x509, certificate, encrypt, decrypt, sign, verify, rsa, dsa, ec, dh

Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 2Programming Language :: Python :: 2.6Programming Language :: Python :: 2.7Programming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.2Programming Language :: Python :: 3.3Programming Language :: Python :: 3.4Programming Language :: Python :: 3.5Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: PyPyTopic :: Security :: Cryptography

About oscrypto

from the package's own PyPI description — quoted content, verbatim

oscrypto

A compilation-free, always up-to-date encryption library for Python that works on Windows, OS X, Linux and BSD. Supports the following versions of Python: 2.6, 2.7, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 and pypy.

Supported Operating Systems
Features
Why Another Python Crypto Library?
Related Crypto Libraries
Current Release
Dependencies
Installation
License
Documentation
Continuous Integration
Testing
Development
CI Tasks

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Supported Operating Systems

The library integrates with the encryption library that is part of the...

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AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

oscrypto provides TLS sockets, key generation, encryption, decryption, signing, and verification using the operating system's native crypto libraries, requiring no compiler and relying on the OS for security patching.

Installation is straightforward with low friction—a pure-Python wheel with only asn1crypto as a runtime dependency. The project maintains active status with recent commits, though the latest release was in March 2022, over four years ago.

MIT license permits unrestricted use, modification, and distribution in both open-source and proprietary contexts with minimal obligations beyond attribution.

Usage

pip install oscrypto
import oscrypto
from oscrypto import asymmetric
public_key, private_key = asymmetric.generate_pair('rsa', 2048)

Requires the operating system's native crypto library (CNG/Secure Channel on Windows, Security.framework on macOS, or OpenSSL/LibreSSL on Linux/BSD) to be available; does not bundle its own.

Verdict: oscrypto is a mature, permissively licensed cryptography library suited for applications needing TLS, key management, and X.509 integration without compilation overhead. Its reliance on OS crypto libraries is a strength for security patching but a constraint for environments without native crypto support. No known vulnerabilities and active maintenance make it reliable for legacy and modern systems alike, though the 2022 release date warrants verification of ongoing support.

Needs verification

Whether the project remains actively maintained beyond the last commit date shown, or if it is in maintenance-only mode
Compatibility with Python 3.11+ given the latest classifier is 3.10
Real-world adoption patterns and whether newer alternatives are preferred for new projects

tls ssl sockets pythonos native cryptographykey generation signing verificationencryption decryption libraryx509 certificate handlingrsa dsa ec cryptographycompilation-free crypto