pyhanko-certvalidator

pyhanko-certvalidator is a Python library designed for robust validation of X.509 certificates and certificate paths. Originally forked from wbond/certvalidator, it has since diverged significantly, incorporating features and architectural changes tailored for the pyHanko ecosystem, particularly for PDF digital signature validation. It supports advanced features such as revocation checks (CRLs and OCSP), point-in-time validation, policy constraints, and various signature algorithms. The current version is 0.30.2, and it follows a regular release cadence as part of the broader pyHanko project.