parse.py

#
# Copyright 2023 Flant JSC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from OpenSSL import crypto
from pprint import pprint


def parse_certificate(crt: str) -> crypto.X509:
    return crypto.load_certificate(crypto.FILETYPE_PEM, crt)


def get_certificate_san(crt: crypto.X509) -> list[str]:
    san = ''
    ext_count = crt.get_extension_count()
    for i in range(0, ext_count):
        ext = crt.get_extension(i)
        if 'subjectAltName' in str(ext.get_short_name()):
            san = ext.__str__()
    return san.split(', ')