90 lines
3.8 KiB
Python
90 lines
3.8 KiB
Python
# authentic2-auth-fc - authentic2 authentication for FranceConnect
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# Copyright (C) 2019 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import json
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import logging
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from django.contrib.auth import get_user_model
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from django.contrib.auth.backends import ModelBackend
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from django.core.exceptions import PermissionDenied, MultipleObjectsReturned
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from django.db import IntegrityError
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from authentic2.a2_rbac.utils import get_default_ou
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from authentic2 import hooks
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from . import models, app_settings, utils
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logger = logging.getLogger(__name__)
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class FcBackend(ModelBackend):
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def authenticate(self, request=None, sub=None, **kwargs):
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user_info = kwargs.get('user_info')
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user = None
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try:
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try:
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account = models.FcAccount.objects.select_related().get(sub=sub)
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except MultipleObjectsReturned:
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account = models.FcAccount.objects.select_related().get(sub=sub, order=0)
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except models.FcAccount.DoesNotExist:
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logger.debug(u'user with the sub %s does not exist.', sub)
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else:
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user = account.user
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logger.debug(u'found user %s with sub %s', user, sub)
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if not user.is_active:
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logger.info(u'user %s login refused, it is inactive', user)
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raise PermissionDenied
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if user_info:
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if not user and app_settings.create:
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User = get_user_model()
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user = User.objects.create(ou=get_default_ou())
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user.set_unusable_password()
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try:
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models.FcAccount.objects.create(
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user=user,
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sub=sub,
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order=0,
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token=json.dumps(kwargs['token']))
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except IntegrityError:
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# uniqueness check failed, as the user is new, it can only means that the sub is not unique
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# let's try again
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user.delete()
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return self.authenticate(sub, **kwargs)
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else:
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logger.debug(u'user creation enabled with fc_account (sub : %s - token : %s)',
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sub, json.dumps(kwargs['token']))
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hooks.call_hooks('event', name='fc-create', user=user, sub=sub)
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if not user:
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return None
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# always handle given_name and family_name
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updated = []
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if user_info.get('given_name') and user.first_name != user_info['given_name']:
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user.first_name = user_info['given_name']
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updated.append('given name: "%s"' % user_info['given_name'])
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if user_info.get('family_name') and user.last_name != user_info['family_name']:
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user.last_name = user_info['family_name']
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updated.append('family name: "%s"' % user_info['family_name'])
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if updated:
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logger.debug('updated (%s)', ' - '.join(updated))
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utils.apply_user_info_mappings(user, user_info)
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return user
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def get_saml2_authn_context(self):
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import lasso
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return lasso.SAML2_AUTHN_CONTEXT_PASSWORD_PROTECTED_TRANSPORT
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