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How to Validate SSL Certificates for Multiple Domains in Python

A Python utility that checks SSL certificate expiry dates for a list of domains using the standard library ssl and socket modules.

ssl certificate validation

Python

import ssl
import socket
from datetime import datetime

def check_ssl_certificate(hostname: str, port: int = 443) -> dict:
    """Validate SSL certificate for a given hostname."""
    context = ssl.create_default_context()
    with socket.create_connection((hostname, port), timeout=5) as sock:
        with context.wra…

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How to Validate SSL Certificates for Multiple Domains in Python

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