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https://github.com/sethmlarson/truststore

Verify certificates using OS trust stores
https://github.com/sethmlarson/truststore

certificates macos python tls truststore windows

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Verify certificates using OS trust stores

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README 

        
# Truststore



[![PyPI](https://img.shields.io/pypi/v/truststore)](https://pypi.org/project/truststore)

[![CI](https://github.com/sethmlarson/truststore/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/sethmlarson/truststore/actions/workflows/ci.yml)



Truststore is a library which exposes native system certificate stores (ie "trust stores")

through an `ssl.SSLContext`-like API. This means that Python applications no longer need to

rely on certifi as a root certificate store. Native system certificate stores

have many helpful features compared to a static certificate bundle like certifi:



- Automatically update certificates as new CAs are created and removed

- Fetch missing intermediate certificates

- Check certificates against certificate revocation lists (CRLs) to avoid monster-in-the-middle (MITM) attacks

- Managed per-system rather than per-application by a operations/IT team

- PyPI is no longer a CA distribution channel 🥳



Right now truststore is a stand-alone library that can be installed globally in your

application to immediately take advantage of the benefits in Python 3.10+. Truststore

has also been integrated into pip 24.2+ as the default method for verifying HTTPS

certificates (with a fallback to certifi).



Long-term the hope is to add this functionality into Python itself. Wish us luck!



## Installation



Truststore is installed from [PyPI](https://pypi.org/project/truststore) with pip:



```{code-block} shell

$ python -m pip install truststore

```



Truststore **requires Python 3.10 or later** and supports the following platforms:

- macOS 10.8+ via [Security framework](https://developer.apple.com/documentation/security)

- Windows via [CryptoAPI](https://docs.microsoft.com/en-us/windows/win32/seccrypto/cryptography-functions#certificate-verification-functions)

- Linux via OpenSSL



## User Guide



> **Warning**

> **PLEASE READ:** `inject_into_ssl()` **must not be used by libraries or packages** as it will cause issues on import time when integrated with other libraries.

> Libraries and packages should instead use `truststore.SSLContext` directly which is detailed below.

> 

> The `inject_into_ssl()` function is intended only for use in applications and scripts.



You can inject `truststore` into the standard library `ssl` module so the functionality is used

by every library by default. To do so use the `truststore.inject_into_ssl()` function:



```python

import truststore

truststore.inject_into_ssl()



# Automatically works with urllib3, requests, aiohttp, and more:

import urllib3

http = urllib3.PoolManager()

resp = http.request("GET", "https://example.com")



import aiohttp

http = aiohttp.ClientSession()

resp = await http.request("GET", "https://example.com")



import requests

resp = requests.get("https://example.com")

```



If you'd like finer-grained control or you're developing a library or package you can create your own `truststore.SSLContext` instance

and use it anywhere you'd use an `ssl.SSLContext`:



```python

import ssl

import truststore



ctx = truststore.SSLContext(ssl.PROTOCOL_TLS_CLIENT)



import urllib3

http = urllib3.PoolManager(ssl_context=ctx)

resp = http.request("GET", "https://example.com")

```



You can read more in the [user guide in the documentation](https://truststore.readthedocs.io/en/latest/#user-guide).



## License



MIT