x509Adapter example with pyca/cryptography

cert_test_pyca.py

import requests

from cryptography.hazmat.primitives.serialization.pkcs12 import load_key_and_certificates
from cryptography.hazmat.primitives.serialization import Encoding, PrivateFormat, NoEncryption
from cryptography.hazmat.backends import default_backend
from requests_toolbelt.adapters.x509 import X509Adapter

backend = default_backend()
with open('test_cert.p12', 'rb') as pkcs12_file:
	pkcs12_data = pkcs12_file.read()

pkcs12_password_bytes = "test".encode('utf8')

pycaP12 = load_key_and_certificates(pkcs12_data, pkcs12_password_bytes, backend)

cert_bytes = pycaP12[1].public_bytes(Encoding.DER)
pk_bytes = pycaP12[0].private_bytes(Encoding.DER, PrivateFormat.PKCS8, NoEncryption())

adapter = X509Adapter(max_retries=3, cert_bytes=cert_bytes, pk_bytes=pk_bytes, encoding=Encoding.DER)
session = requests.Session()
session.mount('https://', adapter)

r = session.get('https://pkiprojecttest01.dev.labs.internal/', verify=False)