235 lines
8.9 KiB
Python
235 lines
8.9 KiB
Python
"""OAuth Callback Views"""
|
|
from typing import Any, Dict, Optional
|
|
|
|
from django.conf import settings
|
|
from django.contrib import messages
|
|
from django.http import Http404, HttpRequest, HttpResponse
|
|
from django.shortcuts import redirect
|
|
from django.urls import reverse
|
|
from django.utils.translation import gettext as _
|
|
from django.views.generic import View
|
|
from structlog import get_logger
|
|
|
|
from passbook.audit.models import Event, EventAction
|
|
from passbook.core.models import User
|
|
from passbook.flows.models import Flow, in_memory_stage
|
|
from passbook.flows.planner import (
|
|
PLAN_CONTEXT_PENDING_USER,
|
|
PLAN_CONTEXT_SSO,
|
|
FlowPlanner,
|
|
)
|
|
from passbook.flows.views import SESSION_KEY_PLAN
|
|
from passbook.lib.utils.urls import redirect_with_qs
|
|
from passbook.policies.utils import delete_none_keys
|
|
from passbook.sources.oauth.auth import AuthorizedServiceBackend
|
|
from passbook.sources.oauth.models import OAuthSource, UserOAuthSourceConnection
|
|
from passbook.sources.oauth.views.base import OAuthClientMixin
|
|
from passbook.sources.oauth.views.flows import (
|
|
PLAN_CONTEXT_SOURCES_OAUTH_ACCESS,
|
|
PostUserEnrollmentStage,
|
|
)
|
|
from passbook.stages.password.stage import PLAN_CONTEXT_AUTHENTICATION_BACKEND
|
|
from passbook.stages.prompt.stage import PLAN_CONTEXT_PROMPT
|
|
|
|
LOGGER = get_logger()
|
|
|
|
|
|
class OAuthCallback(OAuthClientMixin, View):
|
|
"Base OAuth callback view."
|
|
|
|
source_id = None
|
|
source = None
|
|
|
|
# pylint: disable=too-many-return-statements
|
|
def get(self, request: HttpRequest, *_, **kwargs) -> HttpResponse:
|
|
"""View Get handler"""
|
|
slug = kwargs.get("source_slug", "")
|
|
try:
|
|
self.source = OAuthSource.objects.get(slug=slug)
|
|
except OAuthSource.DoesNotExist:
|
|
raise Http404(f"Unknown OAuth source '{slug}'.")
|
|
|
|
if not self.source.enabled:
|
|
raise Http404(f"Source {slug} is not enabled.")
|
|
client = self.get_client(
|
|
self.source, callback=self.get_callback_url(self.source)
|
|
)
|
|
# Fetch access token
|
|
token = client.get_access_token()
|
|
if token is None:
|
|
return self.handle_login_failure(self.source, "Could not retrieve token.")
|
|
if "error" in token:
|
|
return self.handle_login_failure(self.source, token["error"])
|
|
# Fetch profile info
|
|
info = client.get_profile_info(token)
|
|
if info is None:
|
|
return self.handle_login_failure(self.source, "Could not retrieve profile.")
|
|
identifier = self.get_user_id(self.source, info)
|
|
if identifier is None:
|
|
return self.handle_login_failure(self.source, "Could not determine id.")
|
|
# Get or create access record
|
|
defaults = {
|
|
"access_token": token.get("access_token"),
|
|
}
|
|
existing = UserOAuthSourceConnection.objects.filter(
|
|
source=self.source, identifier=identifier
|
|
)
|
|
|
|
if existing.exists():
|
|
connection = existing.first()
|
|
connection.access_token = token.get("access_token")
|
|
UserOAuthSourceConnection.objects.filter(pk=connection.pk).update(
|
|
**defaults
|
|
)
|
|
else:
|
|
connection = UserOAuthSourceConnection(
|
|
source=self.source,
|
|
identifier=identifier,
|
|
access_token=token.get("access_token"),
|
|
)
|
|
user = AuthorizedServiceBackend().authenticate(
|
|
source=self.source, identifier=identifier, request=request
|
|
)
|
|
if user is None:
|
|
if self.request.user.is_authenticated:
|
|
LOGGER.debug("Linking existing user", source=self.source)
|
|
return self.handle_existing_user_link(self.source, connection, info)
|
|
LOGGER.debug("Handling enrollment of new user", source=self.source)
|
|
return self.handle_enroll(self.source, connection, info)
|
|
LOGGER.debug("Handling existing user", source=self.source)
|
|
return self.handle_existing_user(self.source, user, connection, info)
|
|
|
|
# pylint: disable=unused-argument
|
|
def get_callback_url(self, source: OAuthSource) -> str:
|
|
"Return callback url if different than the current url."
|
|
return ""
|
|
|
|
# pylint: disable=unused-argument
|
|
def get_error_redirect(self, source: OAuthSource, reason: str) -> str:
|
|
"Return url to redirect on login failure."
|
|
return settings.LOGIN_URL
|
|
|
|
def get_user_enroll_context(
|
|
self,
|
|
source: OAuthSource,
|
|
access: UserOAuthSourceConnection,
|
|
info: Dict[str, Any],
|
|
) -> Dict[str, Any]:
|
|
"""Create a dict of User data"""
|
|
raise NotImplementedError()
|
|
|
|
# pylint: disable=unused-argument
|
|
def get_user_id(
|
|
self, source: UserOAuthSourceConnection, info: Dict[str, Any]
|
|
) -> Optional[str]:
|
|
"""Return unique identifier from the profile info."""
|
|
if "id" in info:
|
|
return info["id"]
|
|
return None
|
|
|
|
def handle_login_failure(self, source: OAuthSource, reason: str) -> HttpResponse:
|
|
"Message user and redirect on error."
|
|
LOGGER.warning("Authentication Failure", reason=reason)
|
|
messages.error(self.request, _("Authentication Failed."))
|
|
return redirect(self.get_error_redirect(source, reason))
|
|
|
|
def handle_login_flow(self, flow: Flow, **kwargs) -> HttpResponse:
|
|
"""Prepare Authentication Plan, redirect user FlowExecutor"""
|
|
kwargs.update(
|
|
{
|
|
# Since we authenticate the user by their token, they have no backend set
|
|
PLAN_CONTEXT_AUTHENTICATION_BACKEND: "django.contrib.auth.backends.ModelBackend",
|
|
PLAN_CONTEXT_SSO: True,
|
|
}
|
|
)
|
|
# We run the Flow planner here so we can pass the Pending user in the context
|
|
planner = FlowPlanner(flow)
|
|
plan = planner.plan(self.request, kwargs)
|
|
self.request.session[SESSION_KEY_PLAN] = plan
|
|
return redirect_with_qs(
|
|
"passbook_flows:flow-executor-shell",
|
|
self.request.GET,
|
|
flow_slug=flow.slug,
|
|
)
|
|
|
|
# pylint: disable=unused-argument
|
|
def handle_existing_user(
|
|
self,
|
|
source: OAuthSource,
|
|
user: User,
|
|
access: UserOAuthSourceConnection,
|
|
info: Dict[str, Any],
|
|
) -> HttpResponse:
|
|
"Login user and redirect."
|
|
messages.success(
|
|
self.request,
|
|
_(
|
|
"Successfully authenticated with %(source)s!"
|
|
% {"source": self.source.name}
|
|
),
|
|
)
|
|
flow_kwargs = {PLAN_CONTEXT_PENDING_USER: user}
|
|
return self.handle_login_flow(source.authentication_flow, **flow_kwargs)
|
|
|
|
def handle_existing_user_link(
|
|
self,
|
|
source: OAuthSource,
|
|
access: UserOAuthSourceConnection,
|
|
info: Dict[str, Any],
|
|
) -> HttpResponse:
|
|
"""Handler when the user was already authenticated and linked an external source
|
|
to their account."""
|
|
# there's already a user logged in, just link them up
|
|
user = self.request.user
|
|
access.user = user
|
|
access.save()
|
|
UserOAuthSourceConnection.objects.filter(pk=access.pk).update(user=user)
|
|
Event.new(
|
|
EventAction.SOURCE_LINKED, message="Linked OAuth Source", source=source
|
|
).from_http(self.request)
|
|
messages.success(
|
|
self.request,
|
|
_("Successfully linked %(source)s!" % {"source": self.source.name}),
|
|
)
|
|
return redirect(
|
|
reverse(
|
|
"passbook_sources_oauth:oauth-client-user",
|
|
kwargs={"source_slug": self.source.slug},
|
|
)
|
|
)
|
|
|
|
def handle_enroll(
|
|
self,
|
|
source: OAuthSource,
|
|
access: UserOAuthSourceConnection,
|
|
info: Dict[str, Any],
|
|
) -> HttpResponse:
|
|
"""User was not authenticated and previous request was not authenticated."""
|
|
messages.success(
|
|
self.request,
|
|
_(
|
|
"Successfully authenticated with %(source)s!"
|
|
% {"source": self.source.name}
|
|
),
|
|
)
|
|
# Because we inject a stage into the planned flow, we can't use `self.handle_login_flow`
|
|
context = {
|
|
# Since we authenticate the user by their token, they have no backend set
|
|
PLAN_CONTEXT_AUTHENTICATION_BACKEND: "django.contrib.auth.backends.ModelBackend",
|
|
PLAN_CONTEXT_SSO: True,
|
|
PLAN_CONTEXT_PROMPT: delete_none_keys(
|
|
self.get_user_enroll_context(source, access, info)
|
|
),
|
|
PLAN_CONTEXT_SOURCES_OAUTH_ACCESS: access,
|
|
}
|
|
# We run the Flow planner here so we can pass the Pending user in the context
|
|
planner = FlowPlanner(source.enrollment_flow)
|
|
plan = planner.plan(self.request, context)
|
|
plan.append(in_memory_stage(PostUserEnrollmentStage))
|
|
self.request.session[SESSION_KEY_PLAN] = plan
|
|
return redirect_with_qs(
|
|
"passbook_flows:flow-executor-shell",
|
|
self.request.GET,
|
|
flow_slug=source.enrollment_flow.slug,
|
|
)
|