353 lines
14 KiB
Python
353 lines
14 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 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.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 keystoneauth1 import exceptions as keystone_exceptions
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import six
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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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try:
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is_safe_url = http.is_safe_url
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except AttributeError:
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is_safe_url = utils.is_safe_url
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LOG = logging.getLogger(__name__)
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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 utils.is_websso_enabled and
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utils.is_websso_default_redirect()):
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protocol = utils.get_websso_default_redirect_protocol()
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region = utils.get_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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if utils.is_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',
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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(getattr(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 = getattr(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': utils.is_websso_enabled() and len(choices) > 1,
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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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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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# 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.Login.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 = getattr(
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settings, 'PASSWORD_EXPIRES_WARNING_THRESHOLD_DAYS', -1)
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if expiration_time is not None and \
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expiration_time.days <= threshold_days:
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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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@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 utils.is_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' % six.text_type(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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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 (utils.is_websso_enabled and utils.is_websso_default_redirect() and
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utils.get_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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utils.get_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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@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 is_safe_url(url=redirect_to, 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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@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 is_safe_url(url=redirect_to, 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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@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 is_safe_url(url=redirect_to, 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 = getattr(
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settings, 'KEYSTONE_PROVIDER_IDP_ID', 'localkeystone')
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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, (six.text_type(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' % six.text_type(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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