Don't offer password login when it is disabled (#8835)

Fix a minor bug where we would offer "m.login.password" login if a custom auth provider supported it, even if password login was disabled.
pull/8848/head
Richard van der Hoff 2020-12-01 13:04:03 +00:00 committed by GitHub
parent ddc4343683
commit 89f7930730
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3 changed files with 115 additions and 4 deletions

1
changelog.d/8835.bugfix Normal file
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@ -0,0 +1 @@
Fix minor long-standing bug in login, where we would offer the `password` login type if a custom auth provider supported it, even if password login was disabled.

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@ -205,15 +205,23 @@ class AuthHandler(BaseHandler):
# type in the list. (NB that the spec doesn't require us to do so and
# clients which favour types that they don't understand over those that
# they do are technically broken)
# start out by assuming PASSWORD is enabled; we will remove it later if not.
login_types = []
if self._password_enabled:
if hs.config.password_localdb_enabled:
login_types.append(LoginType.PASSWORD)
for provider in self.password_providers:
if hasattr(provider, "get_supported_login_types"):
for t in provider.get_supported_login_types().keys():
if t not in login_types:
login_types.append(t)
if not self._password_enabled:
login_types.remove(LoginType.PASSWORD)
self._supported_login_types = login_types
# Login types and UI Auth types have a heavy overlap, but are not
# necessarily identical. Login types have SSO (and other login types)
# added in the rest layer, see synapse.rest.client.v1.login.LoginRestServerlet.on_GET.

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@ -70,6 +70,24 @@ class CustomAuthProvider:
return mock_password_provider.check_auth(*args)
class PasswordCustomAuthProvider:
"""A password_provider which implements password login via `check_auth`, as well
as a custom type."""
@staticmethod
def parse_config(self):
pass
def __init__(self, config, account_handler):
pass
def get_supported_login_types(self):
return {"m.login.password": ["password"], "test.login_type": ["test_field"]}
def check_auth(self, *args):
return mock_password_provider.check_auth(*args)
def providers_config(*providers: Type[Any]) -> dict:
"""Returns a config dict that will enable the given password auth providers"""
return {
@ -246,7 +264,11 @@ class PasswordAuthProviderTests(unittest.HomeserverTestCase):
mock_password_provider.check_password.reset_mock()
# first delete should give a 401
session = self._start_delete_device_session(tok1, "dev2")
channel = self._delete_device(tok1, "dev2")
self.assertEqual(channel.code, 401)
# there are no valid flows here!
self.assertEqual(channel.json_body["flows"], [])
session = channel.json_body["session"]
mock_password_provider.check_password.assert_not_called()
# now try deleting with the local password
@ -410,6 +432,88 @@ class PasswordAuthProviderTests(unittest.HomeserverTestCase):
self.assertEqual(channel.code, 400, channel.result)
mock_password_provider.check_auth.assert_not_called()
@override_config(
{
**providers_config(PasswordCustomAuthProvider),
"password_config": {"enabled": False},
}
)
def test_password_custom_auth_password_disabled_login(self):
"""log in with a custom auth provider which implements password, but password
login is disabled"""
self.register_user("localuser", "localpass")
flows = self._get_login_flows()
self.assertEqual(flows, [{"type": "test.login_type"}] + ADDITIONAL_LOGIN_FLOWS)
# login shouldn't work and should be rejected with a 400 ("unknown login type")
channel = self._send_password_login("localuser", "localpass")
self.assertEqual(channel.code, 400, channel.result)
mock_password_provider.check_auth.assert_not_called()
@override_config(
{
**providers_config(PasswordCustomAuthProvider),
"password_config": {"enabled": False},
}
)
def test_password_custom_auth_password_disabled_ui_auth(self):
"""UI Auth with a custom auth provider which implements password, but password
login is disabled"""
# register the user and log in twice via the test login type to get two devices,
self.register_user("localuser", "localpass")
mock_password_provider.check_auth.return_value = defer.succeed(
"@localuser:test"
)
channel = self._send_login("test.login_type", "localuser", test_field="")
self.assertEqual(channel.code, 200, channel.result)
tok1 = channel.json_body["access_token"]
channel = self._send_login(
"test.login_type", "localuser", test_field="", device_id="dev2"
)
self.assertEqual(channel.code, 200, channel.result)
# make the initial request which returns a 401
channel = self._delete_device(tok1, "dev2")
self.assertEqual(channel.code, 401)
# Ensure that flows are what is expected. In particular, "password" should *not*
# be present.
self.assertIn({"stages": ["test.login_type"]}, channel.json_body["flows"])
session = channel.json_body["session"]
mock_password_provider.reset_mock()
# check that auth with password is rejected
body = {
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": "localuser"},
# FIXME "identifier" is ignored
# https://github.com/matrix-org/synapse/issues/5665
"user": "localuser",
"password": "localpass",
"session": session,
},
}
channel = self._delete_device(tok1, "dev2", body)
self.assertEqual(channel.code, 400)
self.assertEqual(
"Password login has been disabled.", channel.json_body["error"]
)
mock_password_provider.check_auth.assert_not_called()
mock_password_provider.reset_mock()
# successful auth
body["auth"]["type"] = "test.login_type"
body["auth"]["test_field"] = "x"
channel = self._delete_device(tok1, "dev2", body)
self.assertEqual(channel.code, 200)
mock_password_provider.check_auth.assert_called_once_with(
"localuser", "test.login_type", {"test_field": "x"}
)
@override_config(
{
**providers_config(CustomAuthProvider),
@ -428,8 +532,6 @@ class PasswordAuthProviderTests(unittest.HomeserverTestCase):
channel = self._send_password_login("localuser", "localpass")
self.assertEqual(channel.code, 400, channel.result)
test_custom_auth_no_local_user_fallback.skip = "currently broken"
def _get_login_flows(self) -> JsonDict:
_, channel = self.make_request("GET", "/_matrix/client/r0/login")
self.assertEqual(channel.code, 200, channel.result)