providers/oauth2: don't create events before client_id can be verified to prevent spam
Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>
This commit is contained in:
Jens Langhammer
parent
7d41e6227b
commit
8ba45a5f6a
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@ -24,7 +24,7 @@ class OAuth2Error(SentryIgnoredException):
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return self.error
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def to_event(self, message: Optional[str] = None, **kwargs) -> Event:
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"""Create configuration_error Event and save it."""
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"""Create configuration_error Event."""
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return Event.new(
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EventAction.CONFIGURATION_ERROR,
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message=message or self.description,
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@ -253,6 +253,119 @@ class OAuthAuthorizationParams:
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return code
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class AuthorizationFlowInitView(PolicyAccessView):
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"""OAuth2 Flow initializer, checks access to application and starts flow"""
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params: OAuthAuthorizationParams
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def pre_permission_check(self):
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"""Check prompt parameter before checking permission/authentication,
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see https://openid.net/specs/openid-connect-core-1_0.html#rfc.section.3.1.2.6"""
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# Quick sanity check at the beginning to prevent event spamming
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if len(self.request.GET) < 1:
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raise Http404
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try:
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self.params = OAuthAuthorizationParams.from_request(self.request)
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except AuthorizeError as error:
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LOGGER.warning(error.description, redirect_uri=error.redirect_uri)
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raise RequestValidationError(HttpResponseRedirect(error.create_uri()))
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except OAuth2Error as error:
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LOGGER.warning(error.description)
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raise RequestValidationError(
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bad_request_message(self.request, error.description, title=error.error)
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)
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except OAuth2Provider.DoesNotExist:
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raise Http404
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if PROMPT_NONE in self.params.prompt and not self.request.user.is_authenticated:
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# When "prompt" is set to "none" but the user is not logged in, show an error message
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error = AuthorizeError(
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self.params.redirect_uri,
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"login_required",
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self.params.grant_type,
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self.params.state,
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)
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error.to_event(redirect_uri=error.redirect_uri).from_http(self.request)
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raise RequestValidationError(HttpResponseRedirect(error.create_uri()))
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def resolve_provider_application(self):
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client_id = self.request.GET.get("client_id")
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self.provider = get_object_or_404(OAuth2Provider, client_id=client_id)
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self.application = self.provider.application
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def modify_policy_request(self, request: PolicyRequest) -> PolicyRequest:
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request.context["oauth_scopes"] = self.params.scope
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request.context["oauth_grant_type"] = self.params.grant_type
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request.context["oauth_code_challenge"] = self.params.code_challenge
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request.context["oauth_code_challenge_method"] = self.params.code_challenge_method
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request.context["oauth_max_age"] = self.params.max_age
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request.context["oauth_redirect_uri"] = self.params.redirect_uri
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request.context["oauth_response_type"] = self.params.response_type
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return request
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# pylint: disable=unused-argument
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def get(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
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"""Start FlowPLanner, return to flow executor shell"""
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# After we've checked permissions, and the user has access, check if we need
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# to re-authenticate the user
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if self.params.max_age:
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current_age: timedelta = (
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timezone.now()
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- Event.objects.filter(action=EventAction.LOGIN, user=get_user(self.request.user))
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.latest("created")
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.created
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)
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if current_age.total_seconds() > self.params.max_age:
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return self.handle_no_permission()
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# If prompt=login, we need to re-authenticate the user regardless
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if (
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PROMPT_LOGIN in self.params.prompt
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and SESSION_NEEDS_LOGIN not in self.request.session
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# To prevent the user from having to double login when prompt is set to login
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# and the user has just signed it. This session variable is set in the UserLoginStage
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# and is (quite hackily) removed from the session in applications's API's List method
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and USER_LOGIN_AUTHENTICATED not in self.request.session
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):
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self.request.session[SESSION_NEEDS_LOGIN] = True
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return self.handle_no_permission()
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# Regardless, we start the planner and return to it
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planner = FlowPlanner(self.provider.authorization_flow)
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# planner.use_cache = False
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planner.allow_empty_flows = True
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scope_descriptions = UserInfoView().get_scope_descriptions(self.params.scope)
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plan: FlowPlan = planner.plan(
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self.request,
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{
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PLAN_CONTEXT_SSO: True,
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PLAN_CONTEXT_APPLICATION: self.application,
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# OAuth2 related params
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PLAN_CONTEXT_PARAMS: self.params,
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# Consent related params
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PLAN_CONTEXT_CONSENT_HEADER: _("You're about to sign into %(application)s.")
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% {"application": self.application.name},
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PLAN_CONTEXT_CONSENT_PERMISSIONS: scope_descriptions,
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},
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)
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# OpenID clients can specify a `prompt` parameter, and if its set to consent we
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# need to inject a consent stage
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if PROMPT_CONSENT in self.params.prompt:
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if not any(isinstance(x.stage, ConsentStageView) for x in plan.bindings):
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# Plan does not have any consent stage, so we add an in-memory one
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stage = ConsentStage(
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name="OAuth2 Provider In-memory consent stage",
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mode=ConsentMode.ALWAYS_REQUIRE,
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)
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plan.append_stage(stage)
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plan.append_stage(in_memory_stage(OAuthFulfillmentStage))
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self.request.session[SESSION_KEY_PLAN] = plan
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return redirect_with_qs(
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"authentik_core:if-flow",
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self.request.GET,
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flow_slug=self.provider.authorization_flow.slug,
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)
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class OAuthFulfillmentStage(StageView):
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"""Final stage, restores params from Flow."""
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@ -439,116 +552,3 @@ class OAuthFulfillmentStage(StageView):
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query_fragment["state"] = self.params.state if self.params.state else ""
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return query_fragment
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class AuthorizationFlowInitView(PolicyAccessView):
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"""OAuth2 Flow initializer, checks access to application and starts flow"""
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params: OAuthAuthorizationParams
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def pre_permission_check(self):
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"""Check prompt parameter before checking permission/authentication,
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see https://openid.net/specs/openid-connect-core-1_0.html#rfc.section.3.1.2.6"""
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# Quick sanity check at the beginning to prevent event spamming
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if len(self.request.GET) < 1:
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raise Http404
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try:
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self.params = OAuthAuthorizationParams.from_request(self.request)
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except AuthorizeError as error:
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error.to_event(redirect_uri=error.redirect_uri).from_http(self.request)
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raise RequestValidationError(HttpResponseRedirect(error.create_uri()))
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except OAuth2Error as error:
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error.to_event().from_http(self.request)
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raise RequestValidationError(
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bad_request_message(self.request, error.description, title=error.error)
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)
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except OAuth2Provider.DoesNotExist:
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raise Http404
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if PROMPT_NONE in self.params.prompt and not self.request.user.is_authenticated:
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# When "prompt" is set to "none" but the user is not logged in, show an error message
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error = AuthorizeError(
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self.params.redirect_uri,
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"login_required",
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self.params.grant_type,
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self.params.state,
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)
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error.to_event(redirect_uri=error.redirect_uri).from_http(self.request)
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raise RequestValidationError(HttpResponseRedirect(error.create_uri()))
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def resolve_provider_application(self):
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client_id = self.request.GET.get("client_id")
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self.provider = get_object_or_404(OAuth2Provider, client_id=client_id)
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self.application = self.provider.application
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def modify_policy_request(self, request: PolicyRequest) -> PolicyRequest:
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request.context["oauth_scopes"] = self.params.scope
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request.context["oauth_grant_type"] = self.params.grant_type
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request.context["oauth_code_challenge"] = self.params.code_challenge
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request.context["oauth_code_challenge_method"] = self.params.code_challenge_method
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request.context["oauth_max_age"] = self.params.max_age
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request.context["oauth_redirect_uri"] = self.params.redirect_uri
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request.context["oauth_response_type"] = self.params.response_type
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return request
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# pylint: disable=unused-argument
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def get(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
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"""Start FlowPLanner, return to flow executor shell"""
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# After we've checked permissions, and the user has access, check if we need
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# to re-authenticate the user
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if self.params.max_age:
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current_age: timedelta = (
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timezone.now()
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- Event.objects.filter(action=EventAction.LOGIN, user=get_user(self.request.user))
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.latest("created")
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.created
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)
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if current_age.total_seconds() > self.params.max_age:
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return self.handle_no_permission()
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# If prompt=login, we need to re-authenticate the user regardless
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if (
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PROMPT_LOGIN in self.params.prompt
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and SESSION_NEEDS_LOGIN not in self.request.session
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# To prevent the user from having to double login when prompt is set to login
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# and the user has just signed it. This session variable is set in the UserLoginStage
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# and is (quite hackily) removed from the session in applications's API's List method
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and USER_LOGIN_AUTHENTICATED not in self.request.session
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):
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self.request.session[SESSION_NEEDS_LOGIN] = True
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return self.handle_no_permission()
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# Regardless, we start the planner and return to it
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planner = FlowPlanner(self.provider.authorization_flow)
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# planner.use_cache = False
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planner.allow_empty_flows = True
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scope_descriptions = UserInfoView().get_scope_descriptions(self.params.scope)
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plan: FlowPlan = planner.plan(
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self.request,
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{
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PLAN_CONTEXT_SSO: True,
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PLAN_CONTEXT_APPLICATION: self.application,
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# OAuth2 related params
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PLAN_CONTEXT_PARAMS: self.params,
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# Consent related params
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PLAN_CONTEXT_CONSENT_HEADER: _("You're about to sign into %(application)s.")
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% {"application": self.application.name},
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PLAN_CONTEXT_CONSENT_PERMISSIONS: scope_descriptions,
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},
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)
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# OpenID clients can specify a `prompt` parameter, and if its set to consent we
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# need to inject a consent stage
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if PROMPT_CONSENT in self.params.prompt:
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if not any(isinstance(x.stage, ConsentStageView) for x in plan.bindings):
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# Plan does not have any consent stage, so we add an in-memory one
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stage = ConsentStage(
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name="OAuth2 Provider In-memory consent stage",
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mode=ConsentMode.ALWAYS_REQUIRE,
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)
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plan.append_stage(stage)
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plan.append_stage(in_memory_stage(OAuthFulfillmentStage))
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self.request.session[SESSION_KEY_PLAN] = plan
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return redirect_with_qs(
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"authentik_core:if-flow",
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self.request.GET,
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flow_slug=self.provider.authorization_flow.slug,
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)
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