6ffeb3caba
This patch makes sure that all the variables and attributes that the login page templates use are always defined, to avoid annoying lookup errors in the logs. There is still an error about request.COOKIES.logout_reason because I'm not entirely sure how to best handle that one. Change-Id: I692ea70bc09b819b39587f5bd6cb4e729731754f
388 lines
16 KiB
Python
388 lines
16 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import datetime
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import logging
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from django.conf import settings
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from django.contrib import auth
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from django.contrib.auth.decorators import login_required
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from django.contrib.auth import views as django_auth_views
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from django.contrib import messages
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from django import http as django_http
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from django import shortcuts
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from django.urls import reverse
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from django.utils import functional
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from django.utils import http
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from django.utils.translation import ugettext_lazy as _
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from django.views.decorators.cache import never_cache
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from django.views.decorators.csrf import csrf_exempt
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from django.views.decorators.csrf import csrf_protect
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from django.views.decorators.debug import sensitive_post_parameters
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from django.views.generic import edit as edit_views
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from keystoneauth1 import exceptions as keystone_exceptions
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from openstack_auth import exceptions
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from openstack_auth import forms
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from openstack_auth import plugin
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# This is historic and is added back in to not break older versions of
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# Horizon, fix to Horizon to remove this requirement was committed in
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# Juno
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# pylint: disable=unused-import
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from openstack_auth.forms import Login # noqa:F401
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from openstack_auth import user as auth_user
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from openstack_auth import utils
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LOG = logging.getLogger(__name__)
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# TODO(stephenfin): Migrate to CBV
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@sensitive_post_parameters()
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@csrf_protect
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@never_cache
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def login(request):
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"""Logs a user in using the :class:`~openstack_auth.forms.Login` form."""
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# If the user enabled websso and the default redirect
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# redirect to the default websso url
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if (request.method == 'GET' and settings.WEBSSO_ENABLED and
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settings.WEBSSO_DEFAULT_REDIRECT):
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protocol = settings.WEBSSO_DEFAULT_REDIRECT_PROTOCOL
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region = settings.WEBSSO_DEFAULT_REDIRECT_REGION
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origin = utils.build_absolute_uri(request, '/auth/websso/')
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url = ('%s/auth/OS-FEDERATION/websso/%s?origin=%s' %
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(region, protocol, origin))
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return shortcuts.redirect(url)
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# If the user enabled websso and selects default protocol
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# from the dropdown, We need to redirect user to the websso url
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if request.method == 'POST':
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auth_type = request.POST.get('auth_type', 'credentials')
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request.session['auth_type'] = auth_type
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if settings.WEBSSO_ENABLED and auth_type != 'credentials':
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region_id = request.POST.get('region')
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auth_url = getattr(settings, 'WEBSSO_KEYSTONE_URL', None)
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if auth_url is None:
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auth_url = forms.get_region_endpoint(region_id)
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url = utils.get_websso_url(request, auth_url, auth_type)
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return shortcuts.redirect(url)
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if not request.is_ajax():
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# If the user is already authenticated, redirect them to the
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# dashboard straight away, unless the 'next' parameter is set as it
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# usually indicates requesting access to a page that requires different
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# permissions.
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if (request.user.is_authenticated and
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auth.REDIRECT_FIELD_NAME not in request.GET and
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auth.REDIRECT_FIELD_NAME not in request.POST):
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return shortcuts.redirect(settings.LOGIN_REDIRECT_URL)
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# Get our initial region for the form.
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initial = {}
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current_region = request.session.get('region_endpoint', None)
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requested_region = request.GET.get('region', None)
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regions = dict(settings.AVAILABLE_REGIONS)
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if requested_region in regions and requested_region != current_region:
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initial.update({'region': requested_region})
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if request.method == "POST":
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form = functional.curry(forms.Login)
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else:
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form = functional.curry(forms.Login, initial=initial)
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choices = settings.WEBSSO_CHOICES
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extra_context = {
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'redirect_field_name': auth.REDIRECT_FIELD_NAME,
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'csrf_failure': request.GET.get('csrf_failure'),
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'show_sso_opts': settings.WEBSSO_ENABLED and len(choices) > 1,
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'classes': {
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'value': '',
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'single_value': '',
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'label': '',
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},
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}
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if request.is_ajax():
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template_name = 'auth/_login.html'
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extra_context['hide'] = True
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else:
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template_name = 'auth/login.html'
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try:
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res = django_auth_views.LoginView.as_view(
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template_name=template_name,
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redirect_field_name=auth.REDIRECT_FIELD_NAME,
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form_class=form,
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extra_context=extra_context,
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redirect_authenticated_user=False)(request)
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except exceptions.KeystonePassExpiredException as exc:
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res = django_http.HttpResponseRedirect(
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reverse('password', args=[exc.user_id]))
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msg = _("Your password has expired. Please set a new password.")
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res.set_cookie('logout_reason', msg, max_age=10)
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# Save the region in the cookie, this is used as the default
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# selected region next time the Login form loads.
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if request.method == "POST":
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utils.set_response_cookie(res, 'login_region',
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request.POST.get('region', ''))
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utils.set_response_cookie(res, 'login_domain',
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request.POST.get('domain', ''))
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# Set the session data here because django's session key rotation
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# will erase it if we set it earlier.
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if request.user.is_authenticated:
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auth_user.set_session_from_user(request, request.user)
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regions = dict(forms.get_region_choices())
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region = request.user.endpoint
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login_region = request.POST.get('region')
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region_name = regions.get(login_region)
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request.session['region_endpoint'] = region
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request.session['region_name'] = region_name
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expiration_time = request.user.time_until_expiration()
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threshold_days = settings.PASSWORD_EXPIRES_WARNING_THRESHOLD_DAYS
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if (expiration_time is not None and
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expiration_time.days <= threshold_days and
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expiration_time > datetime.timedelta(0)):
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expiration_time = str(expiration_time).rsplit(':', 1)[0]
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msg = (_('Please consider changing your password, it will expire'
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' in %s minutes') %
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expiration_time).replace(':', ' Hours and ')
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messages.warning(request, msg)
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return res
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# TODO(stephenfin): Migrate to CBV
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@sensitive_post_parameters()
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@csrf_exempt
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@never_cache
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def websso(request):
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"""Logs a user in using a token from Keystone's POST."""
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referer = request.META.get('HTTP_REFERER', settings.OPENSTACK_KEYSTONE_URL)
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auth_url = utils.clean_up_auth_url(referer)
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token = request.POST.get('token')
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try:
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request.user = auth.authenticate(request, auth_url=auth_url,
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token=token)
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except exceptions.KeystoneAuthException as exc:
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if settings.WEBSSO_DEFAULT_REDIRECT:
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res = django_http.HttpResponseRedirect(settings.LOGIN_ERROR)
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else:
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msg = 'Login failed: %s' % exc
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res = django_http.HttpResponseRedirect(settings.LOGIN_URL)
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res.set_cookie('logout_reason', msg, max_age=10)
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return res
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auth_user.set_session_from_user(request, request.user)
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auth.login(request, request.user)
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if request.session.test_cookie_worked():
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request.session.delete_test_cookie()
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return django_http.HttpResponseRedirect(settings.LOGIN_REDIRECT_URL)
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# TODO(stephenfin): Migrate to CBV
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def logout(request, login_url=None, **kwargs):
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"""Logs out the user if he is logged in. Then redirects to the log-in page.
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:param login_url:
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Once logged out, defines the URL where to redirect after login
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:param kwargs:
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see django.contrib.auth.views.logout_then_login extra parameters.
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"""
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msg = 'Logging out user "%(username)s".' % \
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{'username': request.user.username}
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LOG.info(msg)
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""" Securely logs a user out. """
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if (settings.WEBSSO_ENABLED and settings.WEBSSO_DEFAULT_REDIRECT and
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settings.WEBSSO_DEFAULT_REDIRECT_LOGOUT):
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auth_user.unset_session_user_variables(request)
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return django_http.HttpResponseRedirect(
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settings.WEBSSO_DEFAULT_REDIRECT_LOGOUT)
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else:
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return django_auth_views.logout_then_login(request,
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login_url=login_url,
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**kwargs)
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# TODO(stephenfin): Migrate to CBV
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@login_required
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def switch(request, tenant_id, redirect_field_name=auth.REDIRECT_FIELD_NAME):
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"""Switches an authenticated user from one project to another."""
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LOG.debug('Switching to tenant %s for user "%s".',
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tenant_id, request.user.username)
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endpoint, __ = utils.fix_auth_url_version_prefix(request.user.endpoint)
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session = utils.get_session()
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# Keystone can be configured to prevent exchanging a scoped token for
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# another token. Always use the unscoped token for requesting a
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# scoped token.
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unscoped_token = request.user.unscoped_token
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auth = utils.get_token_auth_plugin(auth_url=endpoint,
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token=unscoped_token,
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project_id=tenant_id)
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try:
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auth_ref = auth.get_access(session)
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msg = 'Project switch successful for user "%(username)s".' % \
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{'username': request.user.username}
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LOG.info(msg)
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except keystone_exceptions.ClientException:
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msg = (
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_('Project switch failed for user "%(username)s".') %
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{'username': request.user.username})
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messages.error(request, msg)
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auth_ref = None
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LOG.exception('An error occurred while switching sessions.')
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# Ensure the user-originating redirection url is safe.
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# Taken from django.contrib.auth.views.login()
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redirect_to = request.GET.get(redirect_field_name, '')
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if not http.is_safe_url(url=redirect_to,
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allowed_hosts=[request.get_host()]):
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redirect_to = settings.LOGIN_REDIRECT_URL
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if auth_ref:
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user = auth_user.create_user_from_token(
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request,
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auth_user.Token(auth_ref, unscoped_token=unscoped_token),
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endpoint)
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auth_user.set_session_from_user(request, user)
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message = (
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_('Switch to project "%(project_name)s" successful.') %
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{'project_name': request.user.project_name})
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messages.success(request, message)
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response = shortcuts.redirect(redirect_to)
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utils.set_response_cookie(response, 'recent_project',
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request.user.project_id)
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return response
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# TODO(stephenfin): Migrate to CBV
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@login_required
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def switch_region(request, region_name,
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redirect_field_name=auth.REDIRECT_FIELD_NAME):
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"""Switches the user's region for all services except Identity service.
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The region will be switched if the given region is one of the regions
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available for the scoped project. Otherwise the region is not switched.
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"""
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if region_name in request.user.available_services_regions:
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request.session['services_region'] = region_name
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LOG.debug('Switching services region to %s for user "%s".',
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region_name, request.user.username)
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redirect_to = request.GET.get(redirect_field_name, '')
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if not http.is_safe_url(url=redirect_to,
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allowed_hosts=[request.get_host()]):
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redirect_to = settings.LOGIN_REDIRECT_URL
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response = shortcuts.redirect(redirect_to)
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utils.set_response_cookie(response, 'services_region',
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request.session['services_region'])
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return response
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# TODO(stephenfin): Migrate to CBV
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@login_required
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def switch_keystone_provider(request, keystone_provider=None,
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redirect_field_name=auth.REDIRECT_FIELD_NAME):
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"""Switches the user's keystone provider using K2K Federation
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If keystone_provider is given then we switch the user to
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the keystone provider using K2K federation. Otherwise if keystone_provider
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is None then we switch the user back to the Identity Provider Keystone
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which a non federated token auth will be used.
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"""
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base_token = request.session.get('k2k_base_unscoped_token', None)
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k2k_auth_url = request.session.get('k2k_auth_url', None)
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keystone_providers = request.session.get('keystone_providers', None)
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recent_project = request.COOKIES.get('recent_project')
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if not base_token or not k2k_auth_url:
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msg = _('K2K Federation not setup for this session')
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raise exceptions.KeystoneAuthException(msg)
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redirect_to = request.GET.get(redirect_field_name, '')
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if not http.is_safe_url(url=redirect_to,
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allowed_hosts=[request.get_host()]):
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redirect_to = settings.LOGIN_REDIRECT_URL
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unscoped_auth_ref = None
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keystone_idp_id = settings.KEYSTONE_PROVIDER_IDP_ID
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if keystone_provider == keystone_idp_id:
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current_plugin = plugin.TokenPlugin()
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unscoped_auth = current_plugin.get_plugin(auth_url=k2k_auth_url,
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token=base_token)
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else:
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# Switch to service provider using K2K federation
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plugins = [plugin.TokenPlugin()]
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current_plugin = plugin.K2KAuthPlugin()
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unscoped_auth = current_plugin.get_plugin(
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auth_url=k2k_auth_url, service_provider=keystone_provider,
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plugins=plugins, token=base_token, recent_project=recent_project)
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try:
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# Switch to identity provider using token auth
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unscoped_auth_ref = current_plugin.get_access_info(unscoped_auth)
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except exceptions.KeystoneAuthException as exc:
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msg = 'Switching to Keystone Provider %s has failed. %s' \
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% (keystone_provider, exc)
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messages.error(request, msg)
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if unscoped_auth_ref:
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try:
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request.user = auth.authenticate(
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request, auth_url=unscoped_auth.auth_url,
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token=unscoped_auth_ref.auth_token)
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except exceptions.KeystoneAuthException as exc:
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msg = 'Keystone provider switch failed: %s' % exc
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res = django_http.HttpResponseRedirect(settings.LOGIN_URL)
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res.set_cookie('logout_reason', msg, max_age=10)
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return res
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auth.login(request, request.user)
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auth_user.set_session_from_user(request, request.user)
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request.session['keystone_provider_id'] = keystone_provider
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request.session['keystone_providers'] = keystone_providers
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request.session['k2k_base_unscoped_token'] = base_token
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request.session['k2k_auth_url'] = k2k_auth_url
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message = (
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_('Switch to Keystone Provider "%(keystone_provider)s" '
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'successful.') % {'keystone_provider': keystone_provider})
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messages.success(request, message)
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response = shortcuts.redirect(redirect_to)
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return response
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class PasswordView(edit_views.FormView):
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"""Changes user's password when it's expired or otherwise inaccessible."""
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template_name = 'auth/password.html'
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form_class = forms.Password
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success_url = settings.LOGIN_URL
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def get_initial(self):
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return {'user_id': self.kwargs['user_id']}
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def form_valid(self, form):
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# We have no session here, so regular messages don't work.
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msg = _('Password changed. Please log in to continue.')
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res = django_http.HttpResponseRedirect(self.success_url)
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res.set_cookie('logout_reason', msg, max_age=10)
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return res
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