Check if certificate is revoked using the x509 CRL extension
Project description
crl-checker
This small python library checks if a specific certificate is revoked using the CRL defined in the x509 CRL distribution points extension (https://datatracker.ietf.org/doc/html/rfc5280.html#section-4.2.1.13)
Installation
pip install crl-checker
Usage
Checking revocation using PEM encoded certificate
from crl_checker import check_revoked, Revoked, Error
cert_pem = """
-----BEGIN CERTIFICATE-----
<CERTIFICATE_PEM_BYTES>
-----END CERTIFICATE-----
"""
try:
check_revoked(cert_pem)
except Revoked as e:
print(f"Certificate revoked: {e}")
except Error as e:
print(f"Revocation check failed. Error: {e}")
raise
Checking revocation using an already loaded cryptography x509.Certificate:
from cryptography import x509
from crl_checker import check_revoked_crypto_cert, Revoked, Error
cert : x509.Certificate = ...
try:
check_revoked_crypto_cert(cert)
except Revoked as e:
print(f"Certificate revoked: {e}")
except Error as e:
print(f"Revocation check failed. Error: {e}")
raise
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