Python3 查询证书到期时间+剩余天数

# coding: utf-8
from urllib3.contrib import pyopenssl as reqs
from datetime import datetime


def get_expire_time(url):
    cert = reqs.OpenSSL.crypto.load_certificate(reqs.OpenSSL.crypto.FILETYPE_PEM,
                                                reqs.ssl.get_server_certificate((url, 443)))

    notafter = datetime.strptime(cert.get_notAfter().decode()[0:-1], ‘%Y%m%d%H%M%S‘)  # 获取到的时间戳格式是ans.1的，需要转换
          print(notafter)   #获取证书到期时间
    remain_days = notafter - datetime.now()  # 用证书到期时间减去当前时间
         print(remain_days.days)  #获取剩余天数


if __name__ == ‘__main__‘:
    with open(‘domains.txt‘, ‘r‘) as urls:
        for url in urls.read().splitlines():
            get_expire_time(url)

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