diff options
| -rw-r--r-- | changelog.d/5415.bugfix | 1 | ||||
| -rw-r--r-- | synapse/storage/keys.py | 8 | ||||
| -rw-r--r-- | tests/crypto/test_keyring.py | 50 |
3 files changed, 58 insertions, 1 deletions
diff --git a/changelog.d/5415.bugfix b/changelog.d/5415.bugfix new file mode 100644 index 0000000000..83629e193d --- /dev/null +++ b/changelog.d/5415.bugfix @@ -0,0 +1 @@ +Fix bug where old keys stored in the database with a null valid until timestamp caused all verification requests for that key to fail. diff --git a/synapse/storage/keys.py b/synapse/storage/keys.py index 5300720dbb..e3655ad8d7 100644 --- a/synapse/storage/keys.py +++ b/synapse/storage/keys.py @@ -80,6 +80,14 @@ class KeyStore(SQLBaseStore): for row in txn: server_name, key_id, key_bytes, ts_valid_until_ms = row + + if ts_valid_until_ms is None: + # Old keys may be stored with a ts_valid_until_ms of null, + # in which case we treat this as if it was set to `0`, i.e. + # it won't match key requests that define a minimum + # `ts_valid_until_ms`. + ts_valid_until_ms = 0 + res = FetchKeyResult( verify_key=decode_verify_key_bytes(key_id, bytes(key_bytes)), valid_until_ts=ts_valid_until_ms, diff --git a/tests/crypto/test_keyring.py b/tests/crypto/test_keyring.py index 4b1901ce31..5a355f00cc 100644 --- a/tests/crypto/test_keyring.py +++ b/tests/crypto/test_keyring.py @@ -25,7 +25,11 @@ from twisted.internet import defer from synapse.api.errors import SynapseError from synapse.crypto import keyring -from synapse.crypto.keyring import PerspectivesKeyFetcher, ServerKeyFetcher +from synapse.crypto.keyring import ( + PerspectivesKeyFetcher, + ServerKeyFetcher, + StoreKeyFetcher, +) from synapse.storage.keys import FetchKeyResult from synapse.util import logcontext from synapse.util.logcontext import LoggingContext @@ -219,6 +223,50 @@ class KeyringTestCase(unittest.HomeserverTestCase): # self.assertFalse(d.called) self.get_success(d) + def test_verify_json_for_server_with_null_valid_until_ms(self): + """Tests that we correctly handle key requests for keys we've stored + with a null `ts_valid_until_ms` + """ + mock_fetcher = keyring.KeyFetcher() + mock_fetcher.get_keys = Mock(return_value=defer.succeed({})) + + kr = keyring.Keyring( + self.hs, key_fetchers=(StoreKeyFetcher(self.hs), mock_fetcher) + ) + + key1 = signedjson.key.generate_signing_key(1) + r = self.hs.datastore.store_server_verify_keys( + "server9", + time.time() * 1000, + [("server9", get_key_id(key1), FetchKeyResult(get_verify_key(key1), None))], + ) + self.get_success(r) + + json1 = {} + signedjson.sign.sign_json(json1, "server9", key1) + + # should fail immediately on an unsigned object + d = _verify_json_for_server(kr, "server9", {}, 0, "test unsigned") + self.failureResultOf(d, SynapseError) + + # should fail on a signed object with a non-zero minimum_valid_until_ms, + # as it tries to refetch the keys and fails. + d = _verify_json_for_server( + kr, "server9", json1, 500, "test signed non-zero min" + ) + self.get_failure(d, SynapseError) + + # We expect the keyring tried to refetch the key once. + mock_fetcher.get_keys.assert_called_once_with( + {"server9": {get_key_id(key1): 500}} + ) + + # should succeed on a signed object with a 0 minimum_valid_until_ms + d = _verify_json_for_server( + kr, "server9", json1, 0, "test signed with zero min" + ) + self.get_success(d) + def test_verify_json_dedupes_key_requests(self): """Two requests for the same key should be deduped.""" key1 = signedjson.key.generate_signing_key(1) |