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authentik/passbook/factors/password/factor.py

110 lines
4.9 KiB
Python

"""passbook multi-factor authentication engine"""
from inspect import Signature
from django.contrib import messages
from django.contrib.auth import _clean_credentials
from django.contrib.auth.signals import user_login_failed
from django.core.exceptions import PermissionDenied
from django.forms.utils import ErrorList
from django.shortcuts import redirect, reverse
from django.utils.translation import gettext as _
from django.views.generic import FormView
from structlog import get_logger
from passbook.core.forms.authentication import PasswordFactorForm
from passbook.core.models import Nonce
from passbook.core.tasks import send_email
from passbook.factors.base import AuthenticationFactor
from passbook.factors.view import AuthenticationView
from passbook.lib.config import CONFIG
from passbook.lib.utils.reflection import path_to_class
LOGGER = get_logger()
def authenticate(request, backends, **credentials):
"""If the given credentials are valid, return a User object.
Customized version of django's authenticate, which accepts a list of backends"""
for backend_path in backends:
backend = path_to_class(backend_path)()
try:
signature = Signature.from_callable(backend.authenticate)
signature.bind(request, **credentials)
except TypeError:
LOGGER.debug("Backend doesn't accept our arguments", backend=backend)
# This backend doesn't accept these credentials as arguments. Try the next one.
continue
LOGGER.debug('Attempting authentication...', backend=backend)
try:
user = backend.authenticate(request, **credentials)
except PermissionDenied:
LOGGER.debug('Backend threw PermissionDenied', backend=backend)
# This backend says to stop in our tracks - this user should not be allowed in at all.
break
if user is None:
continue
# Annotate the user object with the path of the backend.
user.backend = backend_path
return user
# The credentials supplied are invalid to all backends, fire signal
user_login_failed.send(sender=__name__, credentials=_clean_credentials(
credentials), request=request)
class PasswordFactor(FormView, AuthenticationFactor):
"""Authentication factor which authenticates against django's AuthBackend"""
form_class = PasswordFactorForm
template_name = 'login/factors/backend.html'
def get_context_data(self, **kwargs):
kwargs['show_password_forget_notice'] = CONFIG.y('passbook.password_reset.enabled')
return super().get_context_data(**kwargs)
def get(self, request, *args, **kwargs):
if 'password-forgotten' in request.GET:
nonce = Nonce.objects.create(user=self.pending_user)
LOGGER.debug("DEBUG %s", str(nonce.uuid))
# Send mail to user
send_email.delay(self.pending_user.email, _('Forgotten password'),
'email/account_password_reset.html', {
'url': self.request.build_absolute_uri(
reverse('passbook_core:auth-password-reset',
kwargs={
'nonce': nonce.uuid
})
)
})
self.authenticator.cleanup()
messages.success(request, _('Check your E-Mails for a password reset link.'))
return redirect('passbook_core:auth-login')
return super().get(request, *args, **kwargs)
def form_valid(self, form):
"""Authenticate against django's authentication backend"""
uid_fields = CONFIG.y('passbook.uid_fields')
kwargs = {
'password': form.cleaned_data.get('password'),
}
for uid_field in uid_fields:
kwargs[uid_field] = getattr(self.authenticator.pending_user, uid_field)
try:
user = authenticate(self.request, self.authenticator.current_factor.backends, **kwargs)
if user:
# User instance returned from authenticate() has .backend property set
self.authenticator.pending_user = user
self.request.session[AuthenticationView.SESSION_USER_BACKEND] = user.backend
return self.authenticator.user_ok()
# No user was found -> invalid credentials
LOGGER.debug("Invalid credentials")
# Manually inject error into form
# pylint: disable=protected-access
errors = form._errors.setdefault("password", ErrorList())
errors.append(_("Invalid password"))
return self.form_invalid(form)
except PermissionDenied:
# User was found, but permission was denied (i.e. user is not active)
LOGGER.debug("Denied access", **kwargs)
return self.authenticator.user_invalid()