40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
"""
|
|
Site-customization for the macadmins Python framework.
|
|
|
|
Why this file exists:
|
|
The python.org Python.framework is built with OpenSSL's default CA-bundle
|
|
path hardcoded to /Library/Frameworks/Python.framework/Versions/<X.Y>/etc/
|
|
openssl/cert.pem. Our framework installs under /Library/ManagedFrameworks/
|
|
Python/Python3.framework/..., so that hardcoded path doesn't exist on
|
|
target machines. Stdlib SSL (urllib.request, http.client.HTTPSConnection,
|
|
ssl.SSLContext with default verify paths, etc.) then fails to find a CA
|
|
bundle and certificate validation errors out.
|
|
|
|
A regular python.org install ships /Applications/Python 3.X/Install
|
|
Certificates.command that fixes this by symlinking the expected path to
|
|
certifi's bundled cacert.pem. We can't do the equivalent because the
|
|
expected path is outside our framework — touching it would conflict with
|
|
a python.org install if the user has one.
|
|
|
|
What it does:
|
|
Sets SSL_CERT_FILE to certifi's bundled cert path during interpreter
|
|
startup. OpenSSL reads SSL_CERT_FILE ahead of its compiled-in path, so
|
|
stdlib SSL operations get a working CA bundle.
|
|
|
|
Only sets the variable when it isn't already set, so an explicit user
|
|
override (e.g. `export SSL_CERT_FILE=/path/to/ca.pem`) still wins.
|
|
|
|
References:
|
|
macadmins/python#38
|
|
gregneagle/relocatable-python#13
|
|
"""
|
|
import os
|
|
|
|
if "SSL_CERT_FILE" not in os.environ:
|
|
try:
|
|
import certifi
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
os.environ["SSL_CERT_FILE"] = certifi.where()
|