208 lines
7.8 KiB
Python
208 lines
7.8 KiB
Python
"""passbook SAML IDP Views"""
|
|
from logging import getLogger
|
|
|
|
from django.contrib import auth
|
|
from django.contrib.auth.decorators import login_required
|
|
from django.core.exceptions import ValidationError
|
|
from django.core.validators import URLValidator
|
|
from django.http import (HttpResponse, HttpResponseBadRequest,
|
|
HttpResponseRedirect)
|
|
from django.shortcuts import redirect, render
|
|
from django.urls import reverse
|
|
from django.utils.datastructures import MultiValueDictKeyError
|
|
# from django.utils.html import escape
|
|
# from django.utils.translation import ugettext as _
|
|
from django.views.decorators.csrf import csrf_exempt
|
|
|
|
from passbook.lib.config import CONFIG
|
|
# from passbook.core.models import Event, Setting, UserAcquirableRelationship
|
|
from passbook.lib.utils.template import render_to_string
|
|
# from passbook.core.views.common import ErrorResponseView
|
|
# from passbook.core.views.settings import GenericSettingView
|
|
from passbook.saml_idp import exceptions, registry, xml_signing
|
|
|
|
# from OpenSSL.crypto import FILETYPE_PEM
|
|
# from OpenSSL.crypto import Error as CryptoError
|
|
# from OpenSSL.crypto import load_certificate
|
|
|
|
|
|
LOGGER = getLogger(__name__)
|
|
URL_VALIDATOR = URLValidator(schemes=('http', 'https'))
|
|
|
|
|
|
def _generate_response(request, processor, remote):
|
|
"""Generate a SAML response using processor and return it in the proper Django
|
|
response."""
|
|
try:
|
|
ctx = processor.generate_response()
|
|
ctx['remote'] = remote
|
|
except exceptions.UserNotAuthorized:
|
|
return render(request, 'saml/idp/invalid_user.html')
|
|
|
|
return render(request, 'saml/idp/login.html', ctx)
|
|
|
|
|
|
def render_xml(request, template, ctx):
|
|
"""Render template with content_type application/xml"""
|
|
return render(request, template, context=ctx, content_type="application/xml")
|
|
|
|
|
|
@csrf_exempt
|
|
def login_begin(request):
|
|
"""Receives a SAML 2.0 AuthnRequest from a Service Provider and
|
|
stores it in the session prior to enforcing login."""
|
|
if request.method == 'POST':
|
|
source = request.POST
|
|
else:
|
|
source = request.GET
|
|
# Store these values now, because Django's login cycle won't preserve them.
|
|
|
|
try:
|
|
request.session['SAMLRequest'] = source['SAMLRequest']
|
|
except (KeyError, MultiValueDictKeyError):
|
|
return HttpResponseBadRequest('the SAML request payload is missing')
|
|
|
|
request.session['RelayState'] = source.get('RelayState', '')
|
|
return redirect(reverse('passbook_saml_idp:saml_login_process'))
|
|
|
|
|
|
def redirect_to_sp(request, acs_url, saml_response, relay_state):
|
|
"""Return autosubmit form"""
|
|
return render(request, 'core/autosubmit_form.html', {
|
|
'url': acs_url,
|
|
'attrs': {
|
|
'SAMLResponse': saml_response,
|
|
'RelayState': relay_state
|
|
}
|
|
})
|
|
|
|
|
|
@login_required
|
|
def login_process(request):
|
|
"""Processor-based login continuation.
|
|
Presents a SAML 2.0 Assertion for POSTing back to the Service Provider."""
|
|
LOGGER.debug("Request: %s", request)
|
|
proc, remote = registry.find_processor(request)
|
|
# Check if user has access
|
|
access = True
|
|
# if remote.productextensionsaml2_set.exists() and \
|
|
# remote.productextensionsaml2_set.first().product_set.exists():
|
|
# # Only check if there is a connection from OAuth2 Application to product
|
|
# product = remote.productextensionsaml2_set.first().product_set.first()
|
|
# relationship = UserAcquirableRelationship.objects.filter(user=request.user, model=product)
|
|
# # Product is invite_only = True and no relation with user exists
|
|
# if product.invite_only and not relationship.exists():
|
|
# access = False
|
|
# Check if we should just autosubmit
|
|
if remote.skip_authorization and access:
|
|
# full_res = _generate_response(request, proc, remote)
|
|
ctx = proc.generate_response()
|
|
# User accepted request
|
|
# Event.create(
|
|
# user=request.user,
|
|
# message=_('You authenticated %s (via SAML) (skipped Authz)' % remote.name),
|
|
# request=request,
|
|
# current=False,
|
|
# hidden=True)
|
|
return redirect_to_sp(
|
|
request=request,
|
|
acs_url=ctx['acs_url'],
|
|
saml_response=ctx['saml_response'],
|
|
relay_state=ctx['relay_state'])
|
|
if request.method == 'POST' and request.POST.get('ACSUrl', None) and access:
|
|
# User accepted request
|
|
# Event.create(
|
|
# user=request.user,
|
|
# message=_('You authenticated %s (via SAML)' % remote.name),
|
|
# request=request,
|
|
# current=False,
|
|
# hidden=True)
|
|
return redirect_to_sp(
|
|
request=request,
|
|
acs_url=request.POST.get('ACSUrl'),
|
|
saml_response=request.POST.get('SAMLResponse'),
|
|
relay_state=request.POST.get('RelayState'))
|
|
try:
|
|
full_res = _generate_response(request, proc, remote)
|
|
# if not access:
|
|
# LOGGER.warning("User '%s' has no invitation to '%s'", request.user, product)
|
|
# messages.error(request, "You have no access to '%s'" % product.name)
|
|
# raise Http404
|
|
return full_res
|
|
except exceptions.CannotHandleAssertion as exc:
|
|
LOGGER.debug(exc)
|
|
# return ErrorResponseView.as_view()(request, str(exc))
|
|
|
|
|
|
@csrf_exempt
|
|
def logout(request):
|
|
"""Allows a non-SAML 2.0 URL to log out the user and
|
|
returns a standard logged-out page. (SalesForce and others use this method,
|
|
though it's technically not SAML 2.0)."""
|
|
auth.logout(request)
|
|
|
|
redirect_url = request.GET.get('redirect_to', '')
|
|
|
|
try:
|
|
URL_VALIDATOR(redirect_url)
|
|
except ValidationError:
|
|
pass
|
|
else:
|
|
return HttpResponseRedirect(redirect_url)
|
|
|
|
return render(request, 'saml/idp/logged_out.html')
|
|
|
|
|
|
@login_required
|
|
@csrf_exempt
|
|
def slo_logout(request):
|
|
"""Receives a SAML 2.0 LogoutRequest from a Service Provider,
|
|
logs out the user and returns a standard logged-out page."""
|
|
request.session['SAMLRequest'] = request.POST['SAMLRequest']
|
|
# TODO: Parse SAML LogoutRequest from POST data, similar to login_process().
|
|
# TODO: Add a URL dispatch for this view.
|
|
# TODO: Modify the base processor to handle logouts?
|
|
# TODO: Combine this with login_process(), since they are so very similar?
|
|
# TODO: Format a LogoutResponse and return it to the browser.
|
|
# XXX: For now, simply log out without validating the request.
|
|
auth.logout(request)
|
|
return render(request, 'saml/idp/logged_out.html')
|
|
|
|
|
|
def descriptor(request):
|
|
"""Replies with the XML Metadata IDSSODescriptor."""
|
|
entity_id = CONFIG.y('saml_idp.issuer')
|
|
slo_url = request.build_absolute_uri(reverse('passbook_saml_idp:saml_logout'))
|
|
sso_url = request.build_absolute_uri(reverse('passbook_saml_idp:saml_login_begin'))
|
|
pubkey = xml_signing.load_certificate(strip=True)
|
|
ctx = {
|
|
'entity_id': entity_id,
|
|
'cert_public_key': pubkey,
|
|
'slo_url': slo_url,
|
|
'sso_url': sso_url
|
|
}
|
|
metadata = render_to_string('saml/xml/metadata.xml', ctx)
|
|
response = HttpResponse(metadata, content_type='application/xml')
|
|
response['Content-Disposition'] = 'attachment; filename="passbook_metadata.xml'
|
|
return response
|
|
|
|
|
|
# class IDPSettingsView(GenericSettingView):
|
|
# """IDP Settings"""
|
|
|
|
# form = IDPSettingsForm
|
|
# template_name = 'saml/idp/settings.html'
|
|
|
|
# def dispatch(self, request, *args, **kwargs):
|
|
# self.extra_data['metadata'] = escape(descriptor(request).content.decode('utf-8'))
|
|
|
|
# # Show the certificate fingerprint
|
|
# sha1_fingerprint = _('<failed to parse certificate>')
|
|
# try:
|
|
# cert = load_certificate(FILETYPE_PEM, CONFIG.y('saml_idp.certificate'))
|
|
# sha1_fingerprint = cert.digest("sha1")
|
|
# except CryptoError:
|
|
# pass
|
|
# self.extra_data['fingerprint'] = sha1_fingerprint
|
|
# return super().dispatch(request, *args, **kwargs)
|