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authentik/passbook/sources/saml/views.py

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2019-11-07 16:02:56 +00:00
"""saml sp views"""
import base64
from defusedxml import ElementTree
from django.contrib.auth import login, logout
from django.http import HttpRequest, HttpResponse
from django.shortcuts import get_object_or_404, redirect, render, reverse
from django.utils.decorators import method_decorator
from django.views import View
from django.views.decorators.csrf import csrf_exempt
from passbook.providers.saml.base import get_random_id, get_time_string
from passbook.providers.saml.utils import nice64
from passbook.providers.saml.views import render_xml
from passbook.sources.saml.models import SAMLSource
from passbook.sources.saml.utils import (_get_user_from_response,
build_full_url, get_entity_id)
from passbook.sources.saml.xml_render import get_authnrequest_xml
class InitiateView(View):
"""Get the Form with SAML Request, which sends us to the IDP"""
def get(self, request: HttpRequest, source: str) -> HttpResponse:
"""Replies with an XHTML SSO Request."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source)
sso_destination = request.GET.get('next', None)
request.session['sso_destination'] = sso_destination
parameters = {
'ACS_URL': build_full_url('acs', request, source),
'DESTINATION': source.idp_url,
'AUTHN_REQUEST_ID': get_random_id(),
'ISSUE_INSTANT': get_time_string(),
'ISSUER': get_entity_id(request, source),
}
authn_req = get_authnrequest_xml(parameters, signed=False)
_request = nice64(str.encode(authn_req))
return render(request, 'saml/sp/login.html', {
'request_url': source.idp_url,
'request': _request,
'token': sso_destination,
'source': source
})
@method_decorator(csrf_exempt, name='dispatch')
class ACSView(View):
"""AssertionConsumerService, consume assertion and log user in"""
def post(self, request: HttpRequest, source: str) -> HttpResponse:
"""Handles a POSTed SSO Assertion and logs the user in."""
# sso_session = request.POST.get('RelayState', None)
data = request.POST.get('SAMLResponse', None)
response = base64.b64decode(data)
root = ElementTree.fromstring(response)
user = _get_user_from_response(root)
# attributes = _get_attributes_from_response(root)
login(request, user, backend='django.contrib.auth.backends.ModelBackend')
return redirect(reverse('passbook_core:overview'))
class SLOView(View):
"""Single-Logout-View"""
def dispatch(self, request: HttpRequest, source: str) -> HttpResponse:
"""Replies with an XHTML SSO Request."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source)
logout(request)
return render(request, 'saml/sp/sso_single_logout.html', {
'idp_logout_url': source.idp_logout_url,
'autosubmit': source.auto_logout,
})
class MetadataView(View):
"""Return XML Metadata for IDP"""
def dispatch(self, request: HttpRequest, source: str) -> HttpResponse:
"""Replies with the XML Metadata SPSSODescriptor."""
source: SAMLSource = get_object_or_404(SAMLSource, slug=source)
entity_id = get_entity_id(request, source)
return render_xml(request, 'saml/sp/xml/spssodescriptor.xml', {
'acs_url': build_full_url('acs', request, source),
'entity_id': entity_id,
'cert_public_key': source.signing_cert,
})