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#!/usr/bin/env python3
import sys
import os
from os.path import *
from cryptography.x509 import *
from cryptography.x509.oid import ExtensionOID
# Check only one argument
if len(sys.argv) != 2:
print("You should only specify one argument, aka, the path of cert.",
file=sys.stderr)
exit(1)
cert_path = sys.argv[1]
if not exists(cert_path):
print("Cert file does not exist.", file=sys.stderr)
exit(2)
if not isfile(cert_path):
print("Cert path is not a file.")
exit(3)
if not 'CRUPEST_DOMAIN' in os.environ:
print("Please set CRUPEST_DOMAIN environment variable to root domain.", file=sys.stderr)
exit(4)
root_domain = os.environ['CRUPEST_DOMAIN']
with open(cert_path, 'rb') as f:
cert = load_pem_x509_certificate(f.read())
ext = cert.extensions.get_extension_for_oid(
ExtensionOID.SUBJECT_ALTERNATIVE_NAME)
domains: list = ext.value.get_values_for_type(DNSName)
domains.remove(root_domain)
domains = [root_domain, *domains]
print('\n'.join(domains))
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