/usr/lib/python2.7/dist-packages/openstack_auth/views.py is in python-openstack-auth 1.1.6-5.
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# 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
import django
from django.conf import settings
from django.contrib import auth
from django.contrib.auth.decorators import login_required # noqa
from django.contrib.auth import views as django_auth_views
from django import shortcuts
from django.utils import functional
from django.utils import http
from django.views.decorators.cache import never_cache # noqa
from django.views.decorators.csrf import csrf_protect # noqa
from django.views.decorators.debug import sensitive_post_parameters # noqa
from keystoneclient import exceptions as keystone_exceptions
from keystoneclient.v2_0 import client as keystone_client_v2
from openstack_auth import forms
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):
""" Logs a user in using the :class:`~openstack_auth.forms.Login` form. """
# 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":
# NOTE(saschpe): Since https://code.djangoproject.com/ticket/15198,
# the 'request' object is passed directly to AuthenticationForm in
# django.contrib.auth.views#login:
if django.VERSION >= (1, 6):
form = functional.curry(forms.Login)
else:
form = functional.curry(forms.Login, request)
else:
form = functional.curry(forms.Login, initial=initial)
extra_context = {'redirect_field_name': auth.REDIRECT_FIELD_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)
# 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
region_name = regions.get(region)
request.session['region_endpoint'] = region
request.session['region_name'] = region_name
return res
def logout(request):
msg = 'Logging out user "%(username)s".' % \
{'username': request.user.username}
LOG.info(msg)
endpoint = request.session.get('region_endpoint')
token = request.session.get('token')
if token and endpoint:
delete_token(endpoint=endpoint, token_id=token.id)
""" Securely logs a user out. """
return django_auth_views.logout_then_login(request)
def delete_token(endpoint, token_id):
"""Delete a token."""
insecure = getattr(settings, 'OPENSTACK_SSL_NO_VERIFY', False)
ca_cert = getattr(settings, "OPENSTACK_SSL_CACERT", None)
try:
if utils.get_keystone_version() < 3:
client = keystone_client_v2.Client(
endpoint=endpoint,
token=token_id,
insecure=insecure,
cacert=ca_cert,
debug=settings.DEBUG
)
client.tokens.delete(token=token_id)
LOG.info('Deleted token %s' % token_id)
else:
# FIXME: KS-client does not have delete token available
# Need to add this later when it is exposed.
pass
except keystone_exceptions.ClientException:
LOG.info('Could not delete token')
@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))
insecure = getattr(settings, 'OPENSTACK_SSL_NO_VERIFY', False)
ca_cert = getattr(settings, "OPENSTACK_SSL_CACERT", None)
endpoint = request.user.endpoint
try:
if utils.get_keystone_version() >= 3:
if 'v3' not in endpoint:
endpoint = endpoint.replace('v2.0', 'v3')
client = utils.get_keystone_client().Client(
tenant_id=tenant_id,
token=request.user.token.id,
auth_url=endpoint,
insecure=insecure,
cacert=ca_cert,
debug=settings.DEBUG)
auth_ref = client.auth_ref
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}
LOG.warning(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.REQUEST.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:
old_endpoint = request.session.get('region_endpoint')
old_token = request.session.get('token')
if old_token and old_endpoint and old_token.id != auth_ref.auth_token:
delete_token(endpoint=old_endpoint, token_id=old_token.id)
user = auth_user.create_user_from_token(
request, auth_user.Token(auth_ref), endpoint)
auth_user.set_session_from_user(request, user)
return shortcuts.redirect(redirect_to)
@login_required
def switch_region(request, region_name,
redirect_field_name=auth.REDIRECT_FIELD_NAME):
"""
Switches the non-identity services region that is being managed
for the scoped project.
"""
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.REQUEST.get(redirect_field_name, '')
if not is_safe_url(url=redirect_to, host=request.get_host()):
redirect_to = settings.LOGIN_REDIRECT_URL
return shortcuts.redirect(redirect_to)
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