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https://github.com/Hopiu/linkchecker.git
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127 lines
4.6 KiB
Python
127 lines
4.6 KiB
Python
# Copyright (C) 2000-2014 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""
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Handle https links.
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"""
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import time
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import threading
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from . import _ConnectionPlugin
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from .. import strformat, LinkCheckerError
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from ..decorators import synchronized
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_lock = threading.Lock()
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# configuration option names
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sslcertwarndays = "sslcertwarndays"
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class SslCertificateCheck(_ConnectionPlugin):
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"""Check SSL certificate expiration date. Only internal https: links
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will be checked. A domain will only be checked once to avoid duplicate
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warnings.
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The expiration warning time can be configured with the sslcertwarndays
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option."""
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def __init__(self, config):
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"""Initialize plugin."""
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super().__init__(config)
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self.warn_ssl_cert_secs_valid = (
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config[sslcertwarndays] * strformat.SECONDS_PER_DAY
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)
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# do not check hosts multiple times
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self.checked_hosts = set()
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def applies_to(self, url_data):
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"""Check validity, scheme, extern and url_connection."""
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return (
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url_data.valid
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and url_data.scheme == 'https'
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and not url_data.extern[0]
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and url_data.url_connection is not None
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)
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@synchronized(_lock)
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def check(self, url_data):
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"""Run all SSL certificate checks that have not yet been done.
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OpenSSL already checked the SSL notBefore and notAfter dates.
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"""
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host = url_data.urlparts[1]
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if host in self.checked_hosts:
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return
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self.checked_hosts.add(host)
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cert = url_data.ssl_cert
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config = url_data.aggregate.config
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if cert and 'notAfter' in cert:
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self.check_ssl_valid_date(url_data, cert)
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elif config['sslverify']:
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msg = _('certificate did not include "notAfter" information')
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url_data.add_warning(msg)
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else:
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msg = _('SSL verification is disabled; enable the sslverify option')
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url_data.add_warning(msg)
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def check_ssl_valid_date(self, url_data, cert):
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"""Check if the certificate is still valid, or if configured check
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if it's at least a number of days valid.
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"""
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import ssl
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try:
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notAfter = ssl.cert_time_to_seconds(cert['notAfter'])
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except ValueError as msg:
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msg = _('Invalid SSL certificate "notAfter" value %r') % cert['notAfter']
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url_data.add_warning(msg)
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return
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curTime = time.time()
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# Calculate seconds until certificate expires. Can be negative if
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# the certificate is already expired.
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secondsValid = notAfter - curTime
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args = dict(expire=cert['notAfter'])
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if secondsValid < 0:
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msg = _('SSL certificate is expired on %(expire)s.')
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url_data.add_warning(msg % args)
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else:
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args['valid'] = strformat.strduration_long(secondsValid)
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if secondsValid < self.warn_ssl_cert_secs_valid:
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msg = _(
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'SSL certificate expires on %(expire)s and is only %(valid)s valid.'
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)
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url_data.add_warning(msg % args)
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else:
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msg = _('SSL certificate expires on %(expire)s and is %(valid)s valid.')
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url_data.add_info(msg % args)
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@classmethod
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def read_config(cls, configparser):
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"""Read configuration file options."""
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config = dict()
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section = cls.__name__
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option = sslcertwarndays
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if configparser.has_option(section, option):
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num = configparser.getint(section, option)
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if num > 0:
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config[option] = num
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else:
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msg = _("invalid value for %s: %d must not be less than %d") % (
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option,
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num,
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0,
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)
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raise LinkCheckerError(msg)
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else:
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# set the default
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config[option] = 30
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return config
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