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"""Test utilities.
.. warning:: This module is not part of the public API.
"""
import importlib.resources
import os
from typing import Callable
from cryptography import x509
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import serialization
import josepy as jose
from josepy.util import ComparableECKey
from OpenSSL import crypto
def load_vector(*names):
"""Load contents of a test vector."""
# luckily, resource_string opens file in binary mode
vector_ref = importlib.resources.files(__package__).joinpath('testdata', *names)
return vector_ref.read_bytes()
def _guess_loader(filename: str, loader_pem: Callable, loader_der: Callable) -> Callable:
_, ext = os.path.splitext(filename)
if ext.lower() == ".pem":
return loader_pem
elif ext.lower() == ".der":
return loader_der
else: # pragma: no cover
raise ValueError("Loader could not be recognized based on extension")
def _guess_pyopenssl_loader(filename: str, loader_pem: int, loader_der: int) -> int:
_, ext = os.path.splitext(filename)
if ext.lower() == ".pem":
return loader_pem
else: # pragma: no cover
raise ValueError("Loader could not be recognized based on extension")
def load_cert(*names: str) -> x509.Certificate:
"""Load certificate."""
loader = _guess_loader(
names[-1], x509.load_pem_x509_certificate, x509.load_der_x509_certificate
)
return loader(load_vector(*names))
def load_csr(*names: str) -> x509.CertificateSigningRequest:
"""Load certificate request."""
loader = _guess_loader(names[-1], x509.load_pem_x509_csr, x509.load_der_x509_csr)
return loader(load_vector(*names))
def load_rsa_private_key(*names):
"""Load RSA private key."""
loader = _guess_loader(names[-1], serialization.load_pem_private_key,
serialization.load_der_private_key)
return jose.ComparableRSAKey(loader(
load_vector(*names), password=None, backend=default_backend()))
def load_ecdsa_private_key(*names):
"""Load ECDSA private key."""
loader = _guess_loader(names[-1], serialization.load_pem_private_key,
serialization.load_der_private_key)
return ComparableECKey(loader(
load_vector(*names), password=None, backend=default_backend()))
def load_pyopenssl_private_key(*names):
"""Load pyOpenSSL private key."""
loader = _guess_pyopenssl_loader(
names[-1], crypto.FILETYPE_PEM, crypto.FILETYPE_ASN1)
return crypto.load_privatekey(loader, load_vector(*names))
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