109 lines
3.9 KiB
Python
109 lines
3.9 KiB
Python
"""saml sp views"""
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import base64
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from defusedxml import ElementTree
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from django.contrib.auth import login, logout
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from django.http import Http404, HttpRequest, HttpResponse
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from django.shortcuts import get_object_or_404, redirect, render, reverse
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from django.utils.decorators import method_decorator
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from django.views import View
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from django.views.decorators.csrf import csrf_exempt
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from passbook.providers.saml.utils import get_random_id, render_xml
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from passbook.providers.saml.utils.encoding import nice64
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from passbook.providers.saml.utils.time import get_time_string
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from passbook.sources.saml.models import SAMLSource
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from passbook.sources.saml.utils import (
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_get_user_from_response,
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build_full_url,
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get_entity_id,
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)
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from passbook.sources.saml.xml_render import get_authnrequest_xml
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class InitiateView(View):
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"""Get the Form with SAML Request, which sends us to the IDP"""
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def get(self, request: HttpRequest, source_slug: str) -> HttpResponse:
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"""Replies with an XHTML SSO Request."""
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source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
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if not source.enabled:
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raise Http404
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sso_destination = request.GET.get("next", None)
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request.session["sso_destination"] = sso_destination
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parameters = {
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"ACS_URL": build_full_url("acs", request, source),
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"DESTINATION": source.idp_url,
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"AUTHN_REQUEST_ID": get_random_id(),
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"ISSUE_INSTANT": get_time_string(),
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"ISSUER": get_entity_id(request, source),
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}
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authn_req = get_authnrequest_xml(parameters, signed=False)
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_request = nice64(str.encode(authn_req))
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return render(
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request,
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"saml/sp/login.html",
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{
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"request_url": source.idp_url,
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"request": _request,
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"token": sso_destination,
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"source": source,
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},
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)
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@method_decorator(csrf_exempt, name="dispatch")
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class ACSView(View):
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"""AssertionConsumerService, consume assertion and log user in"""
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def post(self, request: HttpRequest, source_slug: str) -> HttpResponse:
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"""Handles a POSTed SSO Assertion and logs the user in."""
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source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
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if not source.enabled:
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raise Http404
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# sso_session = request.POST.get('RelayState', None)
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data = request.POST.get("SAMLResponse", None)
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response = base64.b64decode(data)
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root = ElementTree.fromstring(response)
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user = _get_user_from_response(root)
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# attributes = _get_attributes_from_response(root)
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login(request, user, backend="django.contrib.auth.backends.ModelBackend")
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return redirect(reverse("passbook_core:overview"))
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class SLOView(View):
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"""Single-Logout-View"""
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def dispatch(self, request: HttpRequest, source_slug: str) -> HttpResponse:
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"""Replies with an XHTML SSO Request."""
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source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
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if not source.enabled:
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raise Http404
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logout(request)
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return render(
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request,
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"saml/sp/sso_single_logout.html",
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{
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"idp_logout_url": source.idp_logout_url,
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"autosubmit": source.auto_logout,
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},
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)
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class MetadataView(View):
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"""Return XML Metadata for IDP"""
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def dispatch(self, request: HttpRequest, source_slug: str) -> HttpResponse:
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"""Replies with the XML Metadata SPSSODescriptor."""
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source: SAMLSource = get_object_or_404(SAMLSource, slug=source_slug)
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entity_id = get_entity_id(request, source)
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return render_xml(
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request,
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"saml/sp/xml/spssodescriptor.xml",
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{
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"acs_url": build_full_url("acs", request, source),
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"entity_id": entity_id,
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"cert_public_key": source.signing_cert,
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},
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)
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