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➕(backend) add django-lasuite dependency
Use the OIDC backend from the `django-lasuite` library
This commit is contained in:
Quentin BEY
committed by
aleb_the_flash
aleb_the_flash
parent
51f1f0ebbf
commit
10d759bdbb
@@ -1,181 +0,0 @@
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"""Authentication Views for the People core app."""
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import copy
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from urllib.parse import urlencode
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from django.contrib import auth
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from django.core.exceptions import SuspiciousOperation
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from django.http import HttpResponseRedirect
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from django.urls import reverse
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from django.utils import crypto
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from mozilla_django_oidc.utils import (
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absolutify,
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)
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from mozilla_django_oidc.views import (
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OIDCAuthenticationCallbackView as MozillaOIDCAuthenticationCallbackView,
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)
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from mozilla_django_oidc.views import (
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OIDCAuthenticationRequestView as MozillaOIDCAuthenticationRequestView,
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)
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from mozilla_django_oidc.views import (
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OIDCLogoutView as MozillaOIDCOIDCLogoutView,
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)
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class OIDCLogoutView(MozillaOIDCOIDCLogoutView):
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"""Custom logout view for handling OpenID Connect (OIDC) logout flow.
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Adds support for handling logout callbacks from the identity provider (OP)
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by initiating the logout flow if the user has an active session.
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The Django session is retained during the logout process to persist the 'state' OIDC parameter.
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This parameter is crucial for maintaining the integrity of the logout flow between this call
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and the subsequent callback.
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"""
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@staticmethod
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def persist_state(request, state):
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"""Persist the given 'state' parameter in the session's 'oidc_states' dictionary
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This method is used to store the OIDC state parameter in the session, according to the
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structure expected by Mozilla Django OIDC's 'add_state_and_verifier_and_nonce_to_session'
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utility function.
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"""
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if "oidc_states" not in request.session or not isinstance(
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request.session["oidc_states"], dict
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):
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request.session["oidc_states"] = {}
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request.session["oidc_states"][state] = {}
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request.session.save()
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def construct_oidc_logout_url(self, request):
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"""Create the redirect URL for interfacing with the OIDC provider.
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Retrieves the necessary parameters from the session and constructs the URL
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required to initiate logout with the OpenID Connect provider.
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If no ID token is found in the session, the logout flow will not be initiated,
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and the method will return the default redirect URL.
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The 'state' parameter is generated randomly and persisted in the session to ensure
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its integrity during the subsequent callback.
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"""
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oidc_logout_endpoint = self.get_settings("OIDC_OP_LOGOUT_ENDPOINT")
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if not oidc_logout_endpoint:
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return self.redirect_url
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reverse_url = reverse("oidc_logout_callback")
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id_token = request.session.get("oidc_id_token", None)
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if not id_token:
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return self.redirect_url
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query = {
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"id_token_hint": id_token,
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"state": crypto.get_random_string(self.get_settings("OIDC_STATE_SIZE", 32)),
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"post_logout_redirect_uri": absolutify(request, reverse_url),
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}
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self.persist_state(request, query["state"])
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return f"{oidc_logout_endpoint}?{urlencode(query)}"
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def post(self, request):
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"""Handle user logout.
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If the user is not authenticated, redirects to the default logout URL.
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Otherwise, constructs the OIDC logout URL and redirects the user to start
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the logout process.
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If the user is redirected to the default logout URL, ensure her Django session
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is terminated.
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"""
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logout_url = self.redirect_url
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if request.user.is_authenticated:
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logout_url = self.construct_oidc_logout_url(request)
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# If the user is not redirected to the OIDC provider, ensure logout
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if logout_url == self.redirect_url:
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auth.logout(request)
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return HttpResponseRedirect(logout_url)
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class OIDCLogoutCallbackView(MozillaOIDCOIDCLogoutView):
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"""Custom view for handling the logout callback from the OpenID Connect (OIDC) provider.
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Handles the callback after logout from the identity provider (OP).
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Verifies the state parameter and performs necessary logout actions.
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The Django session is maintained during the logout process to ensure the integrity
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of the logout flow initiated in the previous step.
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"""
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http_method_names = ["get"]
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def get(self, request):
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"""Handle the logout callback.
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If the user is not authenticated, redirects to the default logout URL.
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Otherwise, verifies the state parameter and performs necessary logout actions.
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"""
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if not request.user.is_authenticated:
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return HttpResponseRedirect(self.redirect_url)
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state = request.GET.get("state")
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if state not in request.session.get("oidc_states", {}):
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msg = "OIDC callback state not found in session `oidc_states`!"
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raise SuspiciousOperation(msg)
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del request.session["oidc_states"][state]
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request.session.save()
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auth.logout(request)
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return HttpResponseRedirect(self.redirect_url)
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class OIDCAuthenticationCallbackView(MozillaOIDCAuthenticationCallbackView):
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"""Custom callback view for handling the silent login flow."""
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@property
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def failure_url(self):
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"""Override the failure URL property to handle silent login flow
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A silent login failure (e.g., no active user session) should not be
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considered as an authentication failure.
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"""
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if self.request.session.get("silent", None):
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del self.request.session["silent"]
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self.request.session.save()
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return self.success_url
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return super().failure_url
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class OIDCAuthenticationRequestView(MozillaOIDCAuthenticationRequestView):
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"""Custom authentication view for handling the silent login flow."""
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def get_extra_params(self, request):
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"""Handle 'prompt' extra parameter for the silent login flow
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This extra parameter is necessary to distinguish between a standard
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authentication flow and the silent login flow.
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"""
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extra_params = self.get_settings("OIDC_AUTH_REQUEST_EXTRA_PARAMS", None)
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if extra_params is None:
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extra_params = {}
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if request.GET.get("silent") == "true":
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extra_params = copy.deepcopy(extra_params)
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extra_params.update({"prompt": "none"})
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request.session["silent"] = True
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request.session.save()
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return extra_params
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