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import configparser
import os
import re
from unittest import TestCase
import warnings
import xml.etree.ElementTree as ET
import requests
from msal.application import (
_str2bytes, _load_private_key_from_pem_str, _parse_pfx)
latest_cryptography_version = ET.fromstring(
requests.get("https://pypi.org/rss/project/cryptography/releases.xml").text
).findall("./channel/item/title")[0].text
def get_current_ceiling():
parser = configparser.ConfigParser()
parser.read("setup.cfg")
for line in parser["options"]["install_requires"].splitlines():
if line.startswith("cryptography"):
match = re.search(r"<(\d+)", line)
if match:
return int(match.group(1))
raise RuntimeError("Unable to find cryptography info from setup.cfg")
def sibling(filename):
return os.path.join(os.path.dirname(__file__), filename)
class CryptographyTestCase(TestCase):
def test_should_be_run_with_latest_version_of_cryptography(self):
import cryptography
self.assertEqual(
cryptography.__version__, latest_cryptography_version,
"We are using cryptography {} but we should test with latest {} instead. "
"Run 'pip install -U cryptography'.".format(
cryptography.__version__, latest_cryptography_version))
def test_latest_cryptography_should_support_our_usage_without_warnings(self):
passphrase_bytes = _str2bytes("password")
with warnings.catch_warnings(record=True) as encountered_warnings:
with open(sibling("certificate-with-password.pem")) as f:
_load_private_key_from_pem_str(f.read(), passphrase_bytes)
pfx = sibling("certificate-with-password.pfx") # Created by:
# openssl pkcs12 -export -inkey test/certificate-with-password.pem -in tests/certificate-with-password.pem -out tests/certificate-with-password.pfx
_parse_pfx(pfx, passphrase_bytes)
self.assertEqual(0, len(encountered_warnings),
"Did cryptography deprecate the functions that we used?")
def test_ceiling_should_be_latest_cryptography_version_plus_three(self):
expected_ceiling = int(latest_cryptography_version.split(".")[0]) + 3
self.assertEqual(
expected_ceiling, get_current_ceiling(),
"Test passed with latest cryptography, so we shall bump ceiling to N+3={}, "
"based on their latest deprecation policy "
"https://cryptography.io/en/latest/api-stability/#deprecation".format(
expected_ceiling))
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