outposts: Refactor session end signal and add LDAP support (#14539)

* outpost: promote session end signal to non-provider specific

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* implement server-side logout in ldap

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix previous import

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* use better retry logic

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* log

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* make more generic if we switch from ws to something else

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* make it possible to e2e test WS

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix ldap session id

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* ok I actually need to go to bed this took me an hour to fix

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* format; add ldap test

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix leftover state

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* remove thread

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* use ws base for radius

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* separate test utils

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* rename

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix missing super calls

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* websocket tests with browser 🎉

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add proxy test for sign out

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix install_id issue with channels tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix proxy basic auth test

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* big code dedupe

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* allow passing go build args

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* improve waiting for outpost

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* rewrite ldap tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* ok actually fix the tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* undo a couple things that need more time to cook

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* remove unused lockfile-lint dependency since we use a shell script and SFE does not have a lockfile

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix session id for ldap

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix missing createTimestamp and modifyTimestamp ldap attributes

closes #10474

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/outposts/tasks.py

@@ -1,5 +1,6 @@
 """outpost tasks"""
 
+from hashlib import sha256
 from os import R_OK, access
 from pathlib import Path
 from socket import gethostname
@@ -49,6 +50,11 @@ LOGGER = get_logger()
 CACHE_KEY_OUTPOST_DOWN = "goauthentik.io/outposts/teardown/%s"
 
 
+def hash_session_key(session_key: str) -> str:
+    """Hash the session key for sending session end signals"""
+    return sha256(session_key.encode("ascii")).hexdigest()
+
+
 def controller_for_outpost(outpost: Outpost) -> type[BaseController] | None:
     """Get a controller for the outpost, when a service connection is defined"""
     if not outpost.service_connection:
@@ -289,3 +295,20 @@ def outpost_connection_discovery(self: SystemTask):
                 url=unix_socket_path,
             )
     self.set_status(TaskStatus.SUCCESSFUL, *messages)
+
+
+@CELERY_APP.task()
+def outpost_session_end(session_id: str):
+    """Update outpost instances connected to a single outpost"""
+    layer = get_channel_layer()
+    hashed_session_id = hash_session_key(session_id)
+    for outpost in Outpost.objects.all():
+        LOGGER.info("Sending session end signal to outpost", outpost=outpost)
+        group = OUTPOST_GROUP % {"outpost_pk": str(outpost.pk)}
+        async_to_sync(layer.group_send)(
+            group,
+            {
+                "type": "event.session.end",
+                "session_id": hashed_session_id,
+            },
+        )