saml_idp: cleanup, fix XML signing
This commit is contained in:
Jens Langhammer
parent
aa7e3c2a15
commit
ebda84bcaf
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@ -51,7 +51,7 @@ class Processor:
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_saml_response = None
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_session_index = None
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_subject = None
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_subject_format = 'urn:oasis:names:tc:SAML:2.0:nameid-format:email'
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_subject_format = 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent'
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_system_params = {
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'ISSUER': CONFIG.y('saml_idp.issuer'),
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}
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@ -84,8 +84,7 @@ class Processor:
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'AUTH_INSTANT': get_time_string(),
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'ISSUE_INSTANT': get_time_string(),
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'NOT_BEFORE': get_time_string(-1 * HOURS), # TODO: Make these settings.
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'NOT_ON_OR_AFTER': get_time_string(int(CONFIG.y('saml_idp.assertion_valid_for'))
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* MINUTES),
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'NOT_ON_OR_AFTER': get_time_string(86400 * MINUTES),
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'SESSION_INDEX': self._session_index,
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'SESSION_NOT_ON_OR_AFTER': get_time_string(8 * HOURS),
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'SP_NAME_QUALIFIER': self._audience,
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@ -226,7 +225,7 @@ class Processor:
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self._saml_response = sp_config
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self._session_index = sp_config
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self._subject = sp_config
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self._subject_format = 'urn:oasis:names:tc:SAML:2.0:nameid-format:email'
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self._subject_format = 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent'
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self._system_params = {
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'ISSUER': CONFIG.y('saml_idp.issuer'),
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}
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@ -40,8 +40,12 @@ class SAMLProvider(Provider):
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def link_download_metadata(self):
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"""Get link to download XML metadata for admin interface"""
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return reverse('passbook_saml_idp:metadata_xml',
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kwargs={'provider_id': self.pk})
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# pylint: disable=no-member
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if self.application:
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# pylint: disable=no-member
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return reverse('passbook_saml_idp:metadata_xml',
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kwargs={'application': self.application.slug})
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return None
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class Meta:
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@ -5,14 +5,14 @@
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<saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">{{ ISSUER }}</saml:Issuer>
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{% include 'saml/xml/signature.xml' %}
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{{ SUBJECT_STATEMENT }}
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<saml:Conditions NotBefore="2014-07-17T01:01:18Z" NotOnOrAfter="2024-01-18T06:21:48Z">
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<saml:Conditions NotBefore="{{ NOT_BEFORE }}" NotOnOrAfter="{{ NOT_ON_OR_AFTER }}">
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<saml:AudienceRestriction>
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<saml:Audience>{{ AUDIENCE }}</saml:Audience>
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</saml:AudienceRestriction>
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</saml:Conditions>
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<saml:AuthnStatement AuthnInstant="2014-07-17T01:01:48Z" SessionNotOnOrAfter="2024-07-17T09:01:48Z" SessionIndex="_be9967abd904ddcae3c0eb4189adbe3f71e327cf93">
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<saml:AuthnStatement AuthnInstant="{{ NOT_BEFORE }}" SessionIndex="{{ ASSERTION_ID }}">
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<saml:AuthnContext>
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<saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef>
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<saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
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</saml:AuthnContext>
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</saml:AuthnStatement>
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{{ ATTRIBUTE_STATEMENT }}
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@ -1,7 +1,7 @@
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<saml:AttributeStatement>
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{% for attr in attributes %}
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<saml:Attribute FriendlyName="{{ attr.FriendlyName }}" Name="{{ attr.Name }}" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
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<saml:AttributeValue xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xs:string">{{ attr.Value }}</saml:AttributeValue>
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<saml:Attribute {% if attr.FriendlyName %}FriendlyName="{{ attr.FriendlyName }}" {% endif %}Name="{{ attr.Name }}">
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<saml:AttributeValue>{{ attr.Value }}</saml:AttributeValue>
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</saml:Attribute>
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{% endfor %}
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</saml:AttributeStatement>
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@ -16,7 +16,7 @@
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</ds:KeyInfo>
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</md:KeyDescriptor>
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<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="{{ slo_url }}"/>
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<md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:email</md:NameIDFormat>
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<md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:persistent</md:NameIDFormat>
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<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="{{ sso_url }}"/>
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</md:IDPSSODescriptor>
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{% comment %}
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@ -1,4 +1,5 @@
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<samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
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xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
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Destination="{{ ACS_URL }}"
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ID="{{ RESPONSE_ID }}"
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{{ IN_RESPONSE_TO|safe }}
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@ -1,5 +1,5 @@
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<saml:Subject>
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<saml:NameID Format="{{ SUBJECT_FORMAT }}" SPNameQualifier="{{ SP_NAME_QUALIFIER }}">
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<saml:NameID Format="{{ SUBJECT_FORMAT }}">
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{{ SUBJECT }}
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</saml:NameID>
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<saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
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@ -6,8 +6,8 @@ from passbook.saml_idp import views
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urlpatterns = [
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path('login/<slug:application>/',
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views.LoginBeginView.as_view(), name="saml_login_begin"),
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path('login/<slug:application>/idp_init/',
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views.LoginInitView.as_view(), name="saml_login_init"),
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path('login/<slug:application>/initiate/',
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views.InitiateLoginView.as_view(), name="saml_login_init"),
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path('login/<slug:application>/process/',
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views.LoginProcessView.as_view(), name='saml_login_process'),
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path('logout/', views.LogoutView.as_view(), name="saml_logout"),
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@ -1,7 +1,6 @@
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"""passbook SAML IDP Views"""
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from logging import getLogger
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from django.conf import settings
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from django.contrib.auth import logout
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from django.contrib.auth.mixins import LoginRequiredMixin
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from django.core.exceptions import ValidationError
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@ -10,14 +9,6 @@ from django.http import HttpResponse, HttpResponseBadRequest
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from django.shortcuts import get_object_or_404, redirect, render, reverse
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from django.utils.datastructures import MultiValueDictKeyError
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from django.views import View
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from saml2 import BINDING_HTTP_POST
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from saml2.authn_context import PASSWORD, AuthnBroker, authn_context_class_ref
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from saml2.config import IdPConfig
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from saml2.ident import NameID
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from saml2.metadata import entity_descriptor
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from saml2.s_utils import UnknownPrincipal, UnsupportedBinding
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from saml2.saml import NAMEID_FORMAT_EMAILADDRESS, NAMEID_FORMAT_UNSPECIFIED
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from saml2.server import Server
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from signxml.util import strip_pem_header
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from passbook.core.models import Application
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@ -50,11 +41,13 @@ def render_xml(request, template, ctx):
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class ProviderMixin:
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"""Mixin class for Views using a provider instance"""
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_provider = None
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@property
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def provider(self):
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"""Get provider instance"""
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if not self._provider:
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application = get_object_or_404(Application, slug=self.kwargs['application'])
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self._provider = get_object_or_404(SAMLProvider, pk=application.provider_id)
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@ -123,7 +116,7 @@ class LoginProcessView(ProviderMixin, View):
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saml_response=request.POST.get('SAMLResponse'),
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relay_state=request.POST.get('RelayState'))
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try:
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full_res = _generate_response(request, provider)
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full_res = _generate_response(request, self.provider)
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return full_res
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except exceptions.CannotHandleAssertion as exc:
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LOGGER.debug(exc)
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@ -166,33 +159,17 @@ class SLOLogout(CSRFExemptMixin, LoginRequiredMixin, View):
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logout(request)
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return render(request, 'saml/idp/logged_out.html')
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class IdPMixin(ProviderMixin):
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provider = None
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def dispatch(self, request, application):
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def get_identity(self, provider, user):
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""" Create Identity dict (using SP-specific mapping)
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"""
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sp_mapping = {'username': 'username'}
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# return provider.processor.create_identity(user, sp_mapping)
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return {
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out_attr: getattr(user, user_attr)
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for user_attr, out_attr in sp_mapping.items()
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if hasattr(user, user_attr)
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}
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class DescriptorDownloadView(ProviderMixin, View):
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"""Replies with the XML Metadata IDSSODescriptor."""
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def get(self, request, application):
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"""Replies with the XML Metadata IDSSODescriptor."""
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super().dispatch(request, application)
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entity_id = CONFIG.y('saml_idp.issuer')
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slo_url = request.build_absolute_uri(reverse('passbook_saml_idp:saml_logout'))
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sso_url = request.build_absolute_uri(reverse('passbook_saml_idp:saml_login_begin'))
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sso_url = request.build_absolute_uri(reverse('passbook_saml_idp:saml_login_begin', kwargs={
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'application': application
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}))
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pubkey = strip_pem_header(self.provider.signing_cert.replace('\r', '')).replace('\n', '')
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ctx = {
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'entity_id': entity_id,
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@ -207,19 +184,11 @@ class DescriptorDownloadView(ProviderMixin, View):
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return response
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class LoginInitView(IdPMixin, LoginRequiredMixin, View):
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class InitiateLoginView(ProviderMixin, LoginRequiredMixin, View):
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"""IdP-initiated Login"""
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def dispatch(self, request, application):
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"""Initiates an IdP-initiated link to a simple SP resource/target URL."""
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super().dispatch(request, application)
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# # linkdict = dict(metadata.get_links(sp_config))
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# # pattern = linkdict[resource]
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# # is_simple_link = ('/' not in resource)
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# # if is_simple_link:
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# # simple_target = kwargs['target']
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# # url = pattern % simple_target
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# # else:
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# # url = pattern % kwargs
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# provider.processor.init_deep_link(request, 'deep url')
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# return _generate_response(request, provider)
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self.provider.processor.init_deep_link(request, '')
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return _generate_response(request, self.provider)
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@ -83,5 +83,5 @@ def get_response_xml(parameters, saml_provider: 'SAMLProvider', assertion_id='')
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signed = sign_with_signxml(
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saml_provider.signing_key, raw_response, saml_provider.signing_cert,
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reference_uri=assertion_id).decode("utf-8")
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reference_uri=assertion_id)
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return signed
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@ -3,9 +3,8 @@ from logging import getLogger
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import serialization
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from defusedxml import ElementTree
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from lxml import etree # nosec
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from signxml import XMLSigner
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from signxml import XMLSigner, XMLVerifier
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from passbook.lib.utils.template import render_to_string
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@ -17,12 +16,13 @@ def sign_with_signxml(private_key, data, cert, reference_uri=None):
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key = serialization.load_pem_private_key(
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str.encode('\n'.join([x.strip() for x in private_key.split('\n')])),
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password=None, backend=default_backend())
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# LXML is used here because defusedxml causes issues with serialization
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# data is trusted so no issues
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# defused XML is not used here because it messes up XML namespaces
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# Data is trusted, so lxml is ok
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root = etree.fromstring(data) # nosec
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signer = XMLSigner(c14n_algorithm='http://www.w3.org/2001/10/xml-exc-c14n#')
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signed = signer.sign(root, key=key, cert=cert, reference_uri=reference_uri)
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return ElementTree.tostring(signed)
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signed = signer.sign(root, key=key, cert=[cert], reference_uri=reference_uri)
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XMLVerifier().verify(signed, x509_cert=cert)
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return etree.tostring(signed).decode('utf-8') # nosec
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def get_signature_xml():
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