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"""DNS Authenticator for Gehirn Infrastructure Service DNS."""
import logging
from lexicon.providers import gehirn
import zope.interface
from certbot import interfaces
from certbot.plugins import dns_common
from certbot.plugins import dns_common_lexicon
logger = logging.getLogger(__name__)
DASHBOARD_URL = "https://gis.gehirn.jp/"
@zope.interface.implementer(interfaces.IAuthenticator)
@zope.interface.provider(interfaces.IPluginFactory)
class Authenticator(dns_common.DNSAuthenticator):
"""DNS Authenticator for Gehirn Infrastructure Service DNS
This Authenticator uses the Gehirn Infrastructure Service API to fulfill
a dns-01 challenge.
"""
description = 'Obtain certificates using a DNS TXT record ' + \
'(if you are using Gehirn Infrastructure Service for DNS).'
ttl = 60
def __init__(self, *args, **kwargs):
super(Authenticator, self).__init__(*args, **kwargs)
self.credentials = None
@classmethod
def add_parser_arguments(cls, add): # pylint: disable=arguments-differ
super(Authenticator, cls).add_parser_arguments(add, default_propagation_seconds=30)
add('credentials', help='Gehirn Infrastructure Service credentials file.')
def more_info(self): # pylint: disable=missing-docstring,no-self-use
return 'This plugin configures a DNS TXT record to respond to a dns-01 challenge using ' + \
'the Gehirn Infrastructure Service API.'
def _setup_credentials(self):
self.credentials = self._configure_credentials(
'credentials',
'Gehirn Infrastructure Service credentials file',
{
'api-token': 'API token for Gehirn Infrastructure Service ' + \
'API obtained from {0}'.format(DASHBOARD_URL),
'api-secret': 'API secret for Gehirn Infrastructure Service ' + \
'API obtained from {0}'.format(DASHBOARD_URL),
}
)
def _perform(self, domain, validation_name, validation):
self._get_gehirn_client().add_txt_record(domain, validation_name, validation)
def _cleanup(self, domain, validation_name, validation):
self._get_gehirn_client().del_txt_record(domain, validation_name, validation)
def _get_gehirn_client(self):
return _GehirnLexiconClient(
self.credentials.conf('api-token'),
self.credentials.conf('api-secret'),
self.ttl
)
class _GehirnLexiconClient(dns_common_lexicon.LexiconClient):
"""
Encapsulates all communication with the Gehirn Infrastructure Service via Lexicon.
"""
def __init__(self, api_token, api_secret, ttl):
super(_GehirnLexiconClient, self).__init__()
config = dns_common_lexicon.build_lexicon_config('gehirn', {
'ttl': ttl,
}, {
'auth_token': api_token,
'auth_secret': api_secret,
})
self.provider = gehirn.Provider(config)
def _handle_http_error(self, e, domain_name):
if domain_name in str(e) and (str(e).startswith('404 Client Error: Not Found for url:')):
return None # Expected errors when zone name guess is wrong
return super(_GehirnLexiconClient, self)._handle_http_error(e, domain_name)
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