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"""DNS Authenticator for LuaDNS DNS."""
import logging
import zope.interface
from lexicon.providers import luadns
from certbot import errors
from certbot import interfaces
from certbot.plugins import dns_common
from certbot.plugins import dns_common_lexicon
logger = logging.getLogger(__name__)
ACCOUNT_URL = 'https://api.luadns.com/settings'
@zope.interface.implementer(interfaces.IAuthenticator)
@zope.interface.provider(interfaces.IPluginFactory)
class Authenticator(dns_common.DNSAuthenticator):
"""DNS Authenticator for LuaDNS
This Authenticator uses the LuaDNS API to fulfill a dns-01 challenge.
"""
description = 'Obtain certificates using a DNS TXT record (if you are using LuaDNS 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='LuaDNS credentials INI 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 LuaDNS API.'
def _setup_credentials(self):
self.credentials = self._configure_credentials(
'credentials',
'LuaDNS credentials INI file',
{
'email': 'email address associated with LuaDNS account',
'token': 'API token for LuaDNS account, obtained from {0}'.format(ACCOUNT_URL)
}
)
def _perform(self, domain, validation_name, validation):
self._get_luadns_client().add_txt_record(domain, validation_name, validation)
def _cleanup(self, domain, validation_name, validation):
self._get_luadns_client().del_txt_record(domain, validation_name, validation)
def _get_luadns_client(self):
return _LuaDNSLexiconClient(self.credentials.conf('email'),
self.credentials.conf('token'),
self.ttl)
class _LuaDNSLexiconClient(dns_common_lexicon.LexiconClient):
"""
Encapsulates all communication with the LuaDNS via Lexicon.
"""
def __init__(self, email, token, ttl):
super(_LuaDNSLexiconClient, self).__init__()
config = dns_common_lexicon.build_lexicon_config('luadns', {
'ttl': ttl,
}, {
'auth_username': email,
'auth_token': token,
})
self.provider = luadns.Provider(config)
def _handle_http_error(self, e, domain_name):
hint = None
if str(e).startswith('401 Client Error: Unauthorized for url:'):
hint = 'Are your email and API token values correct?'
return errors.PluginError('Error determining zone identifier for {0}: {1}.{2}'
.format(domain_name, e, ' ({0})'.format(hint) if hint else ''))
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