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authentik/passbook/sources/saml/views.py

109 lines
4.3 KiB
Python

"""saml sp views"""
from django.contrib.auth import logout
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import Http404, HttpRequest, HttpResponse
from django.shortcuts import get_object_or_404, redirect, render
from django.utils.decorators import method_decorator
from django.utils.http import urlencode
from django.utils.translation import gettext_lazy as _
from django.views import View
from django.views.decorators.csrf import csrf_exempt
from xmlsec import VerificationError
from passbook.lib.views import bad_request_message
from passbook.providers.saml.utils.encoding import nice64
from passbook.sources.saml.exceptions import (
MissingSAMLResponse,
UnsupportedNameIDFormat,
)
from passbook.sources.saml.models import SAMLBindingTypes, SAMLSource
from passbook.sources.saml.processors.metadata import MetadataProcessor
from passbook.sources.saml.processors.request import RequestProcessor
from passbook.sources.saml.processors.response import ResponseProcessor
class InitiateView(View):
"""Get the Form with SAML Request, which sends us to the IDP"""
def get(self, request: HttpRequest, source_slug: str) -> HttpResponse:
"""Replies with an XHTML SSO Request."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
if not source.enabled:
raise Http404
relay_state = request.GET.get("next", "")
auth_n_req = RequestProcessor(source, request, relay_state)
# If the source is configured for Redirect bindings, we can just redirect there
if source.binding_type == SAMLBindingTypes.Redirect:
url_args = urlencode(auth_n_req.build_auth_n_detached())
return redirect(f"{source.sso_url}?{url_args}")
# As POST Binding we show a form
saml_request = nice64(auth_n_req.build_auth_n())
if source.binding_type == SAMLBindingTypes.POST:
return render(
request,
"saml/sp/login.html",
{
"request_url": source.sso_url,
"request": saml_request,
"relay_state": relay_state,
"source": source,
},
)
# Or an auto-submit form
if source.binding_type == SAMLBindingTypes.POST_AUTO:
return render(
request,
"generic/autosubmit_form_full.html",
{
"title": _("Redirecting to %(app)s..." % {"app": source.name}),
"attrs": {"SAMLRequest": saml_request, "RelayState": relay_state},
"url": source.sso_url,
},
)
raise Http404
@method_decorator(csrf_exempt, name="dispatch")
class ACSView(View):
"""AssertionConsumerService, consume assertion and log user in"""
def post(self, request: HttpRequest, source_slug: str) -> HttpResponse:
"""Handles a POSTed SSO Assertion and logs the user in."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
if not source.enabled:
raise Http404
processor = ResponseProcessor(source)
try:
processor.parse(request)
except MissingSAMLResponse as exc:
return bad_request_message(request, str(exc))
except VerificationError as exc:
return bad_request_message(request, str(exc))
try:
return processor.prepare_flow(request)
except UnsupportedNameIDFormat as exc:
return bad_request_message(request, str(exc))
class SLOView(LoginRequiredMixin, View):
"""Single-Logout-View"""
def dispatch(self, request: HttpRequest, source_slug: str) -> HttpResponse:
"""Log user out and redirect them to the IdP's SLO URL."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
if not source.enabled:
raise Http404
logout(request)
return redirect(source.slo_url)
class MetadataView(View):
"""Return XML Metadata for IDP"""
def dispatch(self, request: HttpRequest, source_slug: str) -> HttpResponse:
"""Replies with the XML Metadata SPSSODescriptor."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
metadata = MetadataProcessor(source, request).build_entity_descriptor()
return HttpResponse(metadata, content_type="text/xml")