diff options
| -rw-r--r-- | changelog.d/16634.misc | 1 | ||||
| -rw-r--r-- | docs/admin_api/user_admin_api.md | 37 | ||||
| -rw-r--r-- | synapse/handlers/e2e_keys.py | 20 | ||||
| -rw-r--r-- | synapse/rest/admin/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/rest/admin/users.py | 40 | ||||
| -rw-r--r-- | synapse/rest/client/keys.py | 16 | ||||
| -rw-r--r-- | synapse/storage/databases/main/end_to_end_keys.py | 84 | ||||
| -rw-r--r-- | synapse/storage/schema/main/delta/83/05_cross_signing_key_update_grant.sql | 15 | ||||
| -rw-r--r-- | tests/handlers/test_e2e_keys.py | 47 | ||||
| -rw-r--r-- | tests/rest/admin/test_user.py | 56 | ||||
| -rw-r--r-- | tests/rest/client/test_keys.py | 188 | ||||
| -rw-r--r-- | tests/storage/databases/main/test_end_to_end_keys.py | 121 |
12 files changed, 613 insertions, 14 deletions
diff --git a/changelog.d/16634.misc b/changelog.d/16634.misc new file mode 100644 index 0000000000..f81cf39691 --- /dev/null +++ b/changelog.d/16634.misc @@ -0,0 +1 @@ +Add an internal [Admin API endpoint](https://matrix-org.github.io/synapse/v1.97/usage/configuration/config_documentation.html#allow-replacing-master-cross-signing-key-without-user-interactive-auth) to temporarily grant the ability to update an existing cross-signing key without UIA. diff --git a/docs/admin_api/user_admin_api.md b/docs/admin_api/user_admin_api.md index b91848dd27..66089c634b 100644 --- a/docs/admin_api/user_admin_api.md +++ b/docs/admin_api/user_admin_api.md @@ -773,6 +773,43 @@ Note: The token will expire if the *admin* user calls `/logout/all` from any of their devices, but the token will *not* expire if the target user does the same. +## Allow replacing master cross-signing key without User-Interactive Auth + +This endpoint is not intended for server administrator usage; +we describe it here for completeness. + +This API temporarily permits a user to replace their master cross-signing key +without going through +[user-interactive authentication](https://spec.matrix.org/v1.8/client-server-api/#user-interactive-authentication-api) (UIA). +This is useful when Synapse has delegated its authentication to the +[Matrix Authentication Service](https://github.com/matrix-org/matrix-authentication-service/); +as Synapse cannot perform UIA is not possible in these circumstances. + +The API is + +```http request +POST /_synapse/admin/v1/users/<user_id>/_allow_cross_signing_replacement_without_uia +{} +``` + +If the user does not exist, or does exist but has no master cross-signing key, +this will return with status code `404 Not Found`. + +Otherwise, a response body like the following is returned, with status `200 OK`: + +```json +{ + "updatable_without_uia_before_ms": 1234567890 +} +``` + +The response body is a JSON object with a single field: + +- `updatable_without_uia_before_ms`: integer. The timestamp in milliseconds + before which the user is permitted to replace their cross-signing key without + going through UIA. + +_Added in Synapse 1.97.0._ ## User devices diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py index d06524495f..70fa931d17 100644 --- a/synapse/handlers/e2e_keys.py +++ b/synapse/handlers/e2e_keys.py @@ -1450,19 +1450,25 @@ class E2eKeysHandler: return desired_key_data - async def is_cross_signing_set_up_for_user(self, user_id: str) -> bool: + async def check_cross_signing_setup(self, user_id: str) -> Tuple[bool, bool]: """Checks if the user has cross-signing set up Args: user_id: The user to check - Returns: - True if the user has cross-signing set up, False otherwise + Returns: a 2-tuple of booleans + - whether the user has cross-signing set up, and + - whether the user's master cross-signing key may be replaced without UIA. """ - existing_master_key = await self.store.get_e2e_cross_signing_key( - user_id, "master" - ) - return existing_master_key is not None + ( + exists, + ts_replacable_without_uia_before, + ) = await self.store.get_master_cross_signing_key_updatable_before(user_id) + + if ts_replacable_without_uia_before is None: + return exists, False + else: + return exists, self.clock.time_msec() < ts_replacable_without_uia_before def _check_cross_signing_key( diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py index 9bd0d764f8..91edfd45d7 100644 --- a/synapse/rest/admin/__init__.py +++ b/synapse/rest/admin/__init__.py @@ -88,6 +88,7 @@ from synapse.rest.admin.users import ( UserByThreePid, UserMembershipRestServlet, UserRegisterServlet, + UserReplaceMasterCrossSigningKeyRestServlet, UserRestServletV2, UsersRestServletV2, UserTokenRestServlet, @@ -292,6 +293,7 @@ def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None: ListDestinationsRestServlet(hs).register(http_server) RoomMessagesRestServlet(hs).register(http_server) RoomTimestampToEventRestServlet(hs).register(http_server) + UserReplaceMasterCrossSigningKeyRestServlet(hs).register(http_server) UserByExternalId(hs).register(http_server) UserByThreePid(hs).register(http_server) diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py index 73878dd99d..9900498fbe 100644 --- a/synapse/rest/admin/users.py +++ b/synapse/rest/admin/users.py @@ -1270,6 +1270,46 @@ class AccountDataRestServlet(RestServlet): } +class UserReplaceMasterCrossSigningKeyRestServlet(RestServlet): + """Allow a given user to replace their master cross-signing key without UIA. + + This replacement is permitted for a limited period (currently 10 minutes). + + While this is exposed via the admin API, this is intended for use by the + Matrix Authentication Service rather than server admins. + """ + + PATTERNS = admin_patterns( + "/users/(?P<user_id>[^/]*)/_allow_cross_signing_replacement_without_uia" + ) + REPLACEMENT_PERIOD_MS = 10 * 60 * 1000 # 10 minutes + + def __init__(self, hs: "HomeServer"): + self._auth = hs.get_auth() + self._store = hs.get_datastores().main + + async def on_POST( + self, + request: SynapseRequest, + user_id: str, + ) -> Tuple[int, JsonDict]: + await assert_requester_is_admin(self._auth, request) + + if user_id is None: + raise NotFoundError("User not found") + + timestamp = ( + await self._store.allow_master_cross_signing_key_replacement_without_uia( + user_id, self.REPLACEMENT_PERIOD_MS + ) + ) + + if timestamp is None: + raise NotFoundError("User has no master cross-signing key") + + return HTTPStatus.OK, {"updatable_without_uia_before_ms": timestamp} + + class UserByExternalId(RestServlet): """Find a user based on an external ID from an auth provider""" diff --git a/synapse/rest/client/keys.py b/synapse/rest/client/keys.py index 70b8be1aa2..add8045439 100644 --- a/synapse/rest/client/keys.py +++ b/synapse/rest/client/keys.py @@ -376,9 +376,10 @@ class SigningKeyUploadServlet(RestServlet): user_id = requester.user.to_string() body = parse_json_object_from_request(request) - is_cross_signing_setup = ( - await self.e2e_keys_handler.is_cross_signing_set_up_for_user(user_id) - ) + ( + is_cross_signing_setup, + master_key_updatable_without_uia, + ) = await self.e2e_keys_handler.check_cross_signing_setup(user_id) # Before MSC3967 we required UIA both when setting up cross signing for the # first time and when resetting the device signing key. With MSC3967 we only @@ -386,9 +387,14 @@ class SigningKeyUploadServlet(RestServlet): # time. Because there is no UIA in MSC3861, for now we throw an error if the # user tries to reset the device signing key when MSC3861 is enabled, but allow # first-time setup. + # + # XXX: We now have a get-out clause by which MAS can temporarily mark the master + # key as replaceable. It should do its own equivalent of user interactive auth + # before doing so. if self.hs.config.experimental.msc3861.enabled: - # There is no way to reset the device signing key with MSC3861 - if is_cross_signing_setup: + # The auth service has to explicitly mark the master key as replaceable + # without UIA to reset the device signing key with MSC3861. + if is_cross_signing_setup and not master_key_updatable_without_uia: raise SynapseError( HTTPStatus.NOT_IMPLEMENTED, "Resetting cross signing keys is not yet supported with MSC3861", diff --git a/synapse/storage/databases/main/end_to_end_keys.py b/synapse/storage/databases/main/end_to_end_keys.py index 8cb61eaee3..9e98729330 100644 --- a/synapse/storage/databases/main/end_to_end_keys.py +++ b/synapse/storage/databases/main/end_to_end_keys.py @@ -1383,6 +1383,51 @@ class EndToEndKeyWorkerStore(EndToEndKeyBackgroundStore, CacheInvalidationWorker return otk_rows + async def get_master_cross_signing_key_updatable_before( + self, user_id: str + ) -> Tuple[bool, Optional[int]]: + """Get time before which a master cross-signing key may be replaced without UIA. + + (UIA means "User-Interactive Auth".) + + There are three cases to distinguish: + (1) No master cross-signing key. + (2) The key exists, but there is no replace-without-UI timestamp in the DB. + (3) The key exists, and has such a timestamp recorded. + + Returns: a 2-tuple of: + - a boolean: is there a master cross-signing key already? + - an optional timestamp, directly taken from the DB. + + In terms of the cases above, these are: + (1) (False, None). + (2) (True, None). + (3) (True, <timestamp in ms>). + + """ + + def impl(txn: LoggingTransaction) -> Tuple[bool, Optional[int]]: + # We want to distinguish between three cases: + txn.execute( + """ + SELECT updatable_without_uia_before_ms + FROM e2e_cross_signing_keys + WHERE user_id = ? AND keytype = 'master' + ORDER BY stream_id DESC + LIMIT 1 + """, + (user_id,), + ) + row = cast(Optional[Tuple[Optional[int]]], txn.fetchone()) + if row is None: + return False, None + return True, row[0] + + return await self.db_pool.runInteraction( + "e2e_cross_signing_keys", + impl, + ) + class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore): def __init__( @@ -1630,3 +1675,42 @@ class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore): ], desc="add_e2e_signing_key", ) + + async def allow_master_cross_signing_key_replacement_without_uia( + self, user_id: str, duration_ms: int + ) -> Optional[int]: + """Mark this user's latest master key as being replaceable without UIA. + + Said replacement will only be permitted for a short time after calling this + function. That time period is controlled by the duration argument. + + Returns: + None, if there is no such key. + Otherwise, the timestamp before which replacement is allowed without UIA. + """ + timestamp = self._clock.time_msec() + duration_ms + + def impl(txn: LoggingTransaction) -> Optional[int]: + txn.execute( + """ + UPDATE e2e_cross_signing_keys + SET updatable_without_uia_before_ms = ? + WHERE stream_id = ( + SELECT stream_id + FROM e2e_cross_signing_keys + WHERE user_id = ? AND keytype = 'master' + ORDER BY stream_id DESC + LIMIT 1 + ) + """, + (timestamp, user_id), + ) + if txn.rowcount == 0: + return None + + return timestamp + + return await self.db_pool.runInteraction( + "allow_master_cross_signing_key_replacement_without_uia", + impl, + ) diff --git a/synapse/storage/schema/main/delta/83/05_cross_signing_key_update_grant.sql b/synapse/storage/schema/main/delta/83/05_cross_signing_key_update_grant.sql new file mode 100644 index 0000000000..b74bdd71fa --- /dev/null +++ b/synapse/storage/schema/main/delta/83/05_cross_signing_key_update_grant.sql @@ -0,0 +1,15 @@ +/* Copyright 2023 The Matrix.org Foundation C.I.C + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +ALTER TABLE e2e_cross_signing_keys ADD COLUMN updatable_without_uia_before_ms bigint DEFAULT NULL; \ No newline at end of file diff --git a/tests/handlers/test_e2e_keys.py b/tests/handlers/test_e2e_keys.py index 90b4da9ad5..07eb63f95e 100644 --- a/tests/handlers/test_e2e_keys.py +++ b/tests/handlers/test_e2e_keys.py @@ -1602,3 +1602,50 @@ class E2eKeysHandlerTestCase(unittest.HomeserverTestCase): } }, ) + + def test_check_cross_signing_setup(self) -> None: + # First check what happens with no master key. + alice = "@alice:test" + exists, replaceable_without_uia = self.get_success( + self.handler.check_cross_signing_setup(alice) + ) + self.assertIs(exists, False) + self.assertIs(replaceable_without_uia, False) + + # Upload a master key but don't specify a replacement timestamp. + dummy_key = {"keys": {"a": "b"}} + self.get_success( + self.store.set_e2e_cross_signing_key("@alice:test", "master", dummy_key) + ) + + # Should now find the key exists. + exists, replaceable_without_uia = self.get_success( + self.handler.check_cross_signing_setup(alice) + ) + self.assertIs(exists, True) + self.assertIs(replaceable_without_uia, False) + + # Set an expiry timestamp in the future. + self.get_success( + self.store.allow_master_cross_signing_key_replacement_without_uia( + alice, + 1000, + ) + ) + + # Should now be allowed to replace the key without UIA. + exists, replaceable_without_uia = self.get_success( + self.handler.check_cross_signing_setup(alice) + ) + self.assertIs(exists, True) + self.assertIs(replaceable_without_uia, True) + + # Wait 2 seconds, so that the timestamp is in the past. + self.reactor.advance(2.0) + + # Should no longer be allowed to replace the key without UIA. + exists, replaceable_without_uia = self.get_success( + self.handler.check_cross_signing_setup(alice) + ) + self.assertIs(exists, True) + self.assertIs(replaceable_without_uia, False) diff --git a/tests/rest/admin/test_user.py b/tests/rest/admin/test_user.py index 492adb6160..cf71bbb461 100644 --- a/tests/rest/admin/test_user.py +++ b/tests/rest/admin/test_user.py @@ -4854,3 +4854,59 @@ class UsersByThreePidTestCase(unittest.HomeserverTestCase): {"user_id": self.other_user}, channel.json_body, ) + + +class AllowCrossSigningReplacementTestCase(unittest.HomeserverTestCase): + servlets = [ + synapse.rest.admin.register_servlets, + login.register_servlets, + ] + + @staticmethod + def url(user: str) -> str: + template = ( + "/_synapse/admin/v1/users/{}/_allow_cross_signing_replacement_without_uia" + ) + return template.format(urllib.parse.quote(user)) + + def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None: + self.store = hs.get_datastores().main + + self.admin_user = self.register_user("admin", "pass", admin=True) + self.admin_user_tok = self.login("admin", "pass") + + self.other_user = self.register_user("user", "pass") + + def test_error_cases(self) -> None: + fake_user = "@bums:other" + channel = self.make_request( + "POST", self.url(fake_user), access_token=self.admin_user_tok + ) + # Fail: user doesn't exist + self.assertEqual(404, channel.code, msg=channel.json_body) + + channel = self.make_request( + "POST", self.url(self.other_user), access_token=self.admin_user_tok + ) + # Fail: user exists, but has no master cross-signing key + self.assertEqual(404, channel.code, msg=channel.json_body) + + def test_success(self) -> None: + # Upload a master key. + dummy_key = {"keys": {"a": "b"}} + self.get_success( + self.store.set_e2e_cross_signing_key(self.other_user, "master", dummy_key) + ) + + channel = self.make_request( + "POST", self.url(self.other_user), access_token=self.admin_user_tok + ) + # Success! + self.assertEqual(200, channel.code, msg=channel.json_body) + + # Should now find that the key exists. + _, timestamp = self.get_success( + self.store.get_master_cross_signing_key_updatable_before(self.other_user) + ) + assert timestamp is not None + self.assertGreater(timestamp, self.clock.time_msec()) diff --git a/tests/rest/client/test_keys.py b/tests/rest/client/test_keys.py index 8ee5489057..9f81a695fa 100644 --- a/tests/rest/client/test_keys.py +++ b/tests/rest/client/test_keys.py @@ -11,8 +11,9 @@ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License - +import urllib.parse from http import HTTPStatus +from unittest.mock import patch from signedjson.key import ( encode_verify_key_base64, @@ -24,12 +25,19 @@ from signedjson.sign import sign_json from synapse.api.errors import Codes from synapse.rest import admin from synapse.rest.client import keys, login -from synapse.types import JsonDict +from synapse.types import JsonDict, Requester, create_requester from tests import unittest from tests.http.server._base import make_request_with_cancellation_test from tests.unittest import override_config +try: + import authlib # noqa: F401 + + HAS_AUTHLIB = True +except ImportError: + HAS_AUTHLIB = False + class KeyQueryTestCase(unittest.HomeserverTestCase): servlets = [ @@ -259,3 +267,179 @@ class KeyQueryTestCase(unittest.HomeserverTestCase): alice_token, ) self.assertEqual(channel.code, HTTPStatus.OK, channel.result) + + +class SigningKeyUploadServletTestCase(unittest.HomeserverTestCase): + servlets = [ + admin.register_servlets, + keys.register_servlets, + ] + + OIDC_ADMIN_TOKEN = "_oidc_admin_token" + + @unittest.skip_unless(HAS_AUTHLIB, "requires authlib") + @override_config( + { + "enable_registration": False, + "experimental_features": { + "msc3861": { + "enabled": True, + "issuer": "https://issuer", + "account_management_url": "https://my-account.issuer", + "client_id": "id", + "client_auth_method": "client_secret_post", + "client_secret": "secret", + "admin_token": OIDC_ADMIN_TOKEN, + }, + }, + } + ) + def test_master_cross_signing_key_replacement_msc3861(self) -> None: + # Provision a user like MAS would, cribbing from + # https://github.com/matrix-org/matrix-authentication-service/blob/08d46a79a4adb22819ac9d55e15f8375dfe2c5c7/crates/matrix-synapse/src/lib.rs#L224-L229 + alice = "@alice:test" + channel = self.make_request( + "PUT", + f"/_synapse/admin/v2/users/{urllib.parse.quote(alice)}", + access_token=self.OIDC_ADMIN_TOKEN, + content={}, + ) + self.assertEqual(channel.code, HTTPStatus.CREATED, channel.json_body) + + # Provision a device like MAS would, cribbing from + # https://github.com/matrix-org/matrix-authentication-service/blob/08d46a79a4adb22819ac9d55e15f8375dfe2c5c7/crates/matrix-synapse/src/lib.rs#L260-L262 + alice_device = "alice_device" + channel = self.make_request( + "POST", + f"/_synapse/admin/v2/users/{urllib.parse.quote(alice)}/devices", + access_token=self.OIDC_ADMIN_TOKEN, + content={"device_id": alice_device}, + ) + self.assertEqual(channel.code, HTTPStatus.CREATED, channel.json_body) + + # Prepare a mock MAS access token. + alice_token = "alice_token_1234_oidcwhatyoudidthere" + + async def mocked_get_user_by_access_token( + token: str, allow_expired: bool = False + ) -> Requester: + self.assertEqual(token, alice_token) + return create_requester( + user_id=alice, + device_id=alice_device, + scope=[], + is_guest=False, + ) + + patch_get_user_by_access_token = patch.object( + self.hs.get_auth(), + "get_user_by_access_token", + wraps=mocked_get_user_by_access_token, + ) + + # Copied from E2eKeysHandlerTestCase + master_pubkey = "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk" + master_pubkey2 = "fHZ3NPiKxoLQm5OoZbKa99SYxprOjNs4TwJUKP+twCM" + master_pubkey3 = "85T7JXPFBAySB/jwby4S3lBPTqY3+Zg53nYuGmu1ggY" + + master_key: JsonDict = { + "user_id": alice, + "usage": ["master"], + "keys": {"ed25519:" + master_pubkey: master_pubkey}, + } + master_key2: JsonDict = { + "user_id": alice, + "usage": ["master"], + "keys": {"ed25519:" + master_pubkey2: master_pubkey2}, + } + master_key3: JsonDict = { + "user_id": alice, + "usage": ["master"], + "keys": {"ed25519:" + master_pubkey3: master_pubkey3}, + } + + with patch_get_user_by_access_token: + # Upload an initial cross-signing key. + channel = self.make_request( + "POST", + "/_matrix/client/v3/keys/device_signing/upload", + access_token=alice_token, + content={ + "master_key": master_key, + }, + ) + self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body) + + # Should not be able to upload another master key. + channel = self.make_request( + "POST", + "/_matrix/client/v3/keys/device_signing/upload", + access_token=alice_token, + content={ + "master_key": master_key2, + }, + ) + self.assertEqual( + channel.code, HTTPStatus.NOT_IMPLEMENTED, channel.json_body + ) + + # Pretend that MAS did UIA and allowed us to replace the master key. + channel = self.make_request( + "POST", + f"/_synapse/admin/v1/users/{urllib.parse.quote(alice)}/_allow_cross_signing_replacement_without_uia", + access_token=self.OIDC_ADMIN_TOKEN, + ) + self.assertEqual(HTTPStatus.OK, channel.code, msg=channel.json_body) + + with patch_get_user_by_access_token: + # Should now be able to upload master key2. + channel = self.make_request( + "POST", + "/_matrix/client/v3/keys/device_signing/upload", + access_token=alice_token, + content={ + "master_key": master_key2, + }, + ) + self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body) + + # Even though we're still in the grace period, we shouldn't be able to + # upload master key 3 immediately after uploading key 2. + channel = self.make_request( + "POST", + "/_matrix/client/v3/keys/device_signing/upload", + access_token=alice_token, + content={ + "master_key": master_key3, + }, + ) + self.assertEqual( + channel.code, HTTPStatus.NOT_IMPLEMENTED, channel.json_body + ) + + # Pretend that MAS did UIA and allowed us to replace the master key. + channel = self.make_request( + "POST", + f"/_synapse/admin/v1/users/{urllib.parse.quote(alice)}/_allow_cross_signing_replacement_without_uia", + access_token=self.OIDC_ADMIN_TOKEN, + ) + self.assertEqual(HTTPStatus.OK, channel.code, msg=channel.json_body) + timestamp_ms = channel.json_body["updatable_without_uia_before_ms"] + + # Advance to 1 second after the replacement period ends. + self.reactor.advance(timestamp_ms - self.clock.time_msec() + 1000) + + with patch_get_user_by_access_token: + # We should not be able to upload master key3 because the replacement has + # expired. + channel = self.make_request( + "POST", + "/_matrix/client/v3/keys/device_signing/upload", + access_token=alice_token, + content={ + "master_key": master_key3, + }, + ) + self.assertEqual( + channel.code, HTTPStatus.NOT_IMPLEMENTED, channel.json_body + ) diff --git a/tests/storage/databases/main/test_end_to_end_keys.py b/tests/storage/databases/main/test_end_to_end_keys.py new file mode 100644 index 0000000000..23e6f82c75 --- /dev/null +++ b/tests/storage/databases/main/test_end_to_end_keys.py @@ -0,0 +1,121 @@ +# Copyright 2023 The Matrix.org Foundation C.I.C. +# +# Licensed under the Apache License, Version 2.0 (the 'License'); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an 'AS IS' BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +from typing import List, Optional, Tuple + +from twisted.test.proto_helpers import MemoryReactor + +from synapse.server import HomeServer +from synapse.storage._base import db_to_json +from synapse.storage.database import LoggingTransaction +from synapse.types import JsonDict +from synapse.util import Clock + +from tests.unittest import HomeserverTestCase + + +class EndToEndKeyWorkerStoreTestCase(HomeserverTestCase): + def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None: + self.store = hs.get_datastores().main + + def test_get_master_cross_signing_key_updatable_before(self) -> None: + # Should return False, None when there is no master key. + alice = "@alice:test" + exists, timestamp = self.get_success( + self.store.get_master_cross_signing_key_updatable_before(alice) + ) + self.assertIs(exists, False) + self.assertIsNone(timestamp) + + # Upload a master key. + dummy_key = {"keys": {"a": "b"}} + self.get_success( + self.store.set_e2e_cross_signing_key(alice, "master", dummy_key) + ) + + # Should now find that the key exists. + exists, timestamp = self.get_success( + self.store.get_master_cross_signing_key_updatable_before(alice) + ) + self.assertIs(exists, True) + self.assertIsNone(timestamp) + + # Write an updateable_before timestamp. + written_timestamp = self.get_success( + self.store.allow_master_cross_signing_key_replacement_without_uia( + alice, 1000 + ) + ) + + # Should now find that the key exists. + exists, timestamp = self.get_success( + self.store.get_master_cross_signing_key_updatable_before(alice) + ) + self.assertIs(exists, True) + self.assertEqual(timestamp, written_timestamp) + + def test_master_replacement_only_applies_to_latest_master_key( + self, + ) -> None: + """We shouldn't allow updates w/o UIA to old master keys or other key types.""" + alice = "@alice:test" + # Upload two master keys. + key1 = {"keys": {"a": "b"}} + key2 = {"keys": {"c": "d"}} + key3 = {"keys": {"e": "f"}} + self.get_success(self.store.set_e2e_cross_signing_key(alice, "master", key1)) + self.get_success(self.store.set_e2e_cross_signing_key(alice, "other", key2)) + self.get_success(self.store.set_e2e_cross_signing_key(alice, "master", key3)) + + # Third key should be the current one. + key = self.get_success( + self.store.get_e2e_cross_signing_key(alice, "master", alice) + ) + self.assertEqual(key, key3) + + timestamp = self.get_success( + self.store.allow_master_cross_signing_key_replacement_without_uia( + alice, 1000 + ) + ) + assert timestamp is not None + + def check_timestamp_column( + txn: LoggingTransaction, + ) -> List[Tuple[JsonDict, Optional[int]]]: + """Fetch all rows for Alice's keys.""" + txn.execute( + """ + SELECT keydata, updatable_without_uia_before_ms + FROM e2e_cross_signing_keys + WHERE user_id = ? + ORDER BY stream_id ASC; + """, + (alice,), + ) + return [(db_to_json(keydata), ts) for keydata, ts in txn.fetchall()] + + values = self.get_success( + self.store.db_pool.runInteraction( + "check_timestamp_column", + check_timestamp_column, + ) + ) + self.assertEqual( + values, + [ + (key1, None), + (key2, None), + (key3, timestamp), + ], + ) |