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