Commit c6583c92 authored by Valentin Samir's avatar Valentin Samir

Support authentication renewal in federate mode

parent ed3e382e
......@@ -42,13 +42,13 @@ class CASFederateValidateUser(object):
#: the identity provider
provider = None
def __init__(self, provider, service_url):
def __init__(self, provider, service_url, renew=False):
self.provider = provider
self.client = CASClient(
service_url=service_url,
version=provider.cas_protocol_version,
server_url=provider.server_url,
renew=False,
renew=renew,
)
def get_login_url(self):
......
......@@ -84,6 +84,10 @@ class FederateAuthLoginLogoutTestCase(
params['provider'] = provider.suffix
if remember:
params['remember'] = 'on'
# just try for one suffix
if suffix == "example.com":
# if renew=False is posted it should be ignored
params["renew"] = False
# post the choosed provider
response = client.post('/federate', params)
# we are redirected to the provider CAS client url
......@@ -351,6 +355,76 @@ class FederateAuthLoginLogoutTestCase(
provider.suffix
))
def test_forget_provider(self):
"""Test the logout option to forget remembered provider"""
tickets = self.test_login_post_provider(remember=True)
for (provider, _, client) in tickets:
self.assertIn("remember_provider", client.cookies)
self.assertEqual(client.cookies["remember_provider"].value, provider.suffix)
self.assertNotEqual(client.cookies["remember_provider"]["max-age"], 0)
client.get("/logout?forget_provider=1")
self.assertEqual(client.cookies["remember_provider"]["max-age"], 0)
def test_renew(self):
"""
Test authentication renewal with federation mode
"""
tickets = self.test_login_post_provider()
for (provider, _, client) in tickets:
# Try to renew authentication(client already authenticated in test_login_post_provider
response = client.get("/login?renew=true")
# we should be redirected to the user CAS
self.assertEqual(response.status_code, 302)
self.assertEqual(response["Location"], "%s/federate/%s?renew=true" % (
'http://testserver' if django.VERSION < (1, 9) else "",
provider.suffix
))
response = client.get("/federate/%s?renew=true" % provider.suffix)
self.assertEqual(response.status_code, 302)
service_url = (
"service=http%%3A%%2F%%2Ftestserver%%2Ffederate%%2F%s%%3Frenew%%3Dtrue"
) % provider.suffix
self.assertIn(service_url, response["Location"])
self.assertIn("renew=true", response["Location"])
cas_port = int(provider.server_url.split(':')[-1])
# let's generate a ticket
ticket = utils.gen_st()
# we lauch a dummy CAS server that only validate once for the service
# http://testserver/federate/example.com?renew=true with `ticket`
tests_utils.DummyCAS.run(
("http://testserver/federate/%s?renew=true" % provider.suffix).encode("ascii"),
ticket.encode("ascii"),
settings.CAS_TEST_USER.encode("utf8"),
[],
cas_port
)
# we normally provide a good ticket and should be redirected to /login as the ticket
# get successfully validated again the dummy CAS
response = client.get(
'/federate/%s' % provider.suffix,
{'ticket': ticket, 'renew': 'true'}
)
self.assertEqual(response.status_code, 302)
self.assertEqual(response["Location"], "%s/login?renew=true" % (
'http://testserver' if django.VERSION < (1, 9) else ""
))
# follow the redirect and try to get a ticket to see is it has renew set to True
response = client.get("/login?renew=true&service=%s" % self.service)
# we should get a page with a from with all widget hidden that auto POST to /login using
# javascript. If javascript is disabled, a "connect" button is showed
self.assertTrue(response.context['auto_submit'])
self.assertEqual(response.context['post_url'], '/login')
params = tests_utils.copy_form(response.context["form"])
# POST get prefiled from parameters
response = client.post("/login", params)
self.assertEqual(response.status_code, 302)
self.assertTrue(response["Location"].startswith("%s?ticket=" % self.service))
ticket_value = response["Location"].split('ticket=')[-1]
ticket = models.ServiceTicket.objects.get(value=ticket_value)
self.assertTrue(ticket.renew)
def test_login_bad_ticket(self):
"""
Try login with a bad ticket:
......
......@@ -212,6 +212,7 @@ class LogoutView(View, LogoutMixin):
class FederateAuth(View):
"""view to authenticated user agains a backend CAS then CAS_FEDERATE is True"""
@method_decorator(csrf_exempt) # csrf is disabled for allowing SLO requests reception
def dispatch(self, request, *args, **kwargs):
"""
......@@ -221,7 +222,7 @@ class FederateAuth(View):
"""
return super(FederateAuth, self).dispatch(request, *args, **kwargs)
def get_cas_client(self, request, provider):
def get_cas_client(self, request, provider, renew=False):
"""
return a CAS client object matching provider
......@@ -234,7 +235,7 @@ class FederateAuth(View):
# compute the current url, ignoring ticket dans provider GET parameters
service_url = utils.get_current_url(request, {"ticket", "provider"})
self.service_url = service_url
return CASFederateValidateUser(provider, service_url)
return CASFederateValidateUser(provider, service_url, renew=renew)
def post(self, request, provider=None):
"""
......@@ -291,16 +292,17 @@ class FederateAuth(View):
if not settings.CAS_FEDERATE:
logger.warning("CAS_FEDERATE is False, set it to True to use the federated mode")
return redirect("cas_server:login")
renew = bool(request.GET.get('renew') and request.GET['renew'] != "False")
# Is the user is already authenticated, no need to request authentication to the user
# identity provider.
if self.request.session.get("authenticated"):
if self.request.session.get("authenticated") and not renew:
logger.warning("User already authenticated, dropping federate authentication request")
return redirect("cas_server:login")
try:
# get the identity provider from its suffix
provider = FederatedIendityProvider.objects.get(suffix=provider)
# get a CAS client for the user identity provider
auth = self.get_cas_client(request, provider)
auth = self.get_cas_client(request, provider, renew)
# if no ticket submited, redirect to the identity provider CAS login page
if 'ticket' not in request.GET:
logger.info("Trying to authenticate again %s" % auth.provider.server_url)
......@@ -871,6 +873,24 @@ class LoginView(View, LogoutMixin):
)
return HttpResponseRedirect(url)
else:
# if user is authenticated and auth renewal is requested, redirect directly
# to the user identity provider
if self.renew and self.request.session.get("authenticated"):
try:
user = FederatedUser.get_from_federated_username(
self.request.session.get("username")
)
params = utils.copy_params(self.request.GET)
url = utils.reverse_params(
"cas_server:federateAuth",
params=params,
kwargs=dict(provider=user.provider.suffix)
)
return HttpResponseRedirect(url)
# Should normally not happen: if the user is logged, it exists in the
# database.
except FederatedUser.DoesNotExist: # pragma: no cover
pass
return render(
self.request,
settings.CAS_LOGIN_TEMPLATE,
......
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