Fix typechecker problems exposed by signedjson 1.1.2 (#12326)

Author: David Robertson

changelog.d/12326.misc

@@ -0,0 +1 @@
+Fix typechecker problems exposed by signedjson 1.1.2.

mypy.ini

@@ -273,6 +273,9 @@ ignore_missing_imports = True
 [mypy-ijson.*]
 ignore_missing_imports = True
 
+[mypy-importlib_metadata.*]
+ignore_missing_imports = True
+
 [mypy-jaeger_client.*]
 ignore_missing_imports = True
 

synapse/config/key.py

@@ -16,7 +16,7 @@
 import hashlib
 import logging
 import os
-from typing import Any, Dict, Iterator, List, Optional
+from typing import TYPE_CHECKING, Any, Dict, Iterator, List, Optional
 
 import attr
 import jsonschema
@@ -38,6 +38,9 @@
 
 from ._base import Config, ConfigError
 
+if TYPE_CHECKING:
+    from signedjson.key import VerifyKeyWithExpiry
+
 INSECURE_NOTARY_ERROR = """\
 Your server is configured to accept key server responses without signature
 validation or TLS certificate validation. This is likely to be very insecure. If
@@ -300,16 +303,16 @@ def read_signing_keys(self, signing_key_path: str, name: str) -> List[SigningKey
 
     def read_old_signing_keys(
         self, old_signing_keys: Optional[JsonDict]
-    ) -> Dict[str, VerifyKey]:
+    ) -> Dict[str, "VerifyKeyWithExpiry"]:
         if old_signing_keys is None:
             return {}
         keys = {}
         for key_id, key_data in old_signing_keys.items():
             if is_signing_algorithm_supported(key_id):
                 key_base64 = key_data["key"]
                 key_bytes = decode_base64(key_base64)
-                verify_key = decode_verify_key_bytes(key_id, key_bytes)
-                verify_key.expired_ts = key_data["expired_ts"]
+                verify_key: "VerifyKeyWithExpiry" = decode_verify_key_bytes(key_id, key_bytes)  # type: ignore[assignment]
+                verify_key.expired = key_data["expired_ts"]
                 keys[key_id] = verify_key
             else:
                 raise ConfigError(
@@ -422,7 +425,7 @@ def _parse_key_servers(
         server_name = server["server_name"]
         result = TrustedKeyServer(server_name=server_name)
 
-        verify_keys = server.get("verify_keys")
+        verify_keys: Optional[Dict[str, str]] = server.get("verify_keys")
         if verify_keys is not None:
             result.verify_keys = {}
             for key_id, key_base64 in verify_keys.items():

synapse/crypto/keyring.py

@@ -176,7 +176,7 @@ def __init__(
         self._local_verify_keys: Dict[str, FetchKeyResult] = {}
         for key_id, key in hs.config.key.old_signing_keys.items():
             self._local_verify_keys[key_id] = FetchKeyResult(
-                verify_key=key, valid_until_ts=key.expired_ts
+                verify_key=key, valid_until_ts=key.expired
             )
 
         vk = get_verify_key(hs.signing_key)

synapse/events/builder.py

@@ -15,7 +15,7 @@
 from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
 
 import attr
-from nacl.signing import SigningKey
+from signedjson.types import SigningKey
 
 from synapse.api.constants import MAX_DEPTH
 from synapse.api.room_versions import (

synapse/rest/key/v2/local_key_resource.py

@@ -76,17 +76,17 @@ def update_response_body(self, time_now_msec: int) -> None:
 
     def response_json_object(self) -> JsonDict:
         verify_keys = {}
-        for key in self.config.key.signing_key:
-            verify_key_bytes = key.verify_key.encode()
-            key_id = "%s:%s" % (key.alg, key.version)
+        for signing_key in self.config.key.signing_key:
+            verify_key_bytes = signing_key.verify_key.encode()
+            key_id = "%s:%s" % (signing_key.alg, signing_key.version)
             verify_keys[key_id] = {"key": encode_base64(verify_key_bytes)}
 
         old_verify_keys = {}
-        for key_id, key in self.config.key.old_signing_keys.items():
-            verify_key_bytes = key.encode()
+        for key_id, old_signing_key in self.config.key.old_signing_keys.items():
+            verify_key_bytes = old_signing_key.encode()
             old_verify_keys[key_id] = {
                 "key": encode_base64(verify_key_bytes),
-                "expired_ts": key.expired_ts,
+                "expired_ts": old_signing_key.expired,
             }
 
         json_object = {

synapse/rest/key/v2/remote_key_resource.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import logging
-from typing import TYPE_CHECKING, Dict
+from typing import TYPE_CHECKING, Dict, Set
 
 from signedjson.sign import sign_json
 
@@ -149,7 +149,7 @@ async def query_keys(
 
         cached = await self.store.get_server_keys_json(store_queries)
 
-        json_results = set()
+        json_results: Set[bytes] = set()
 
         time_now_ms = self.clock.time_msec()
 
@@ -234,8 +234,8 @@ async def query_keys(
             await self.query_keys(request, query, query_remote_on_cache_miss=False)
         else:
             signed_keys = []
-            for key_json in json_results:
-                key_json = json_decoder.decode(key_json.decode("utf-8"))
+            for key_json_raw in json_results:
+                key_json = json_decoder.decode(key_json_raw.decode("utf-8"))
                 for signing_key in self.config.key.key_server_signing_keys:
                     key_json = sign_json(
                         key_json, self.config.server.server_name, signing_key

tests/crypto/test_event_signing.py

@@ -28,8 +28,8 @@
 SIGNING_KEY_SEED = decode_base64("YJDBA9Xnr2sVqXD9Vj7XVUnmFZcZrlw8Md7kMW+3XA1")
 
 KEY_ALG = "ed25519"
-KEY_VER = 1
-KEY_NAME = "%s:%d" % (KEY_ALG, KEY_VER)
+KEY_VER = "1"
+KEY_NAME = "%s:%s" % (KEY_ALG, KEY_VER)
 
 HOSTNAME = "domain"
 
@@ -39,7 +39,7 @@ def setUp(self):
         # NB: `signedjson` expects `nacl.signing.SigningKey` instances which have been
         # monkeypatched to include new `alg` and `version` attributes. This is captured
         # by the `signedjson.types.SigningKey` protocol.
-        self.signing_key: signedjson.types.SigningKey = nacl.signing.SigningKey(
+        self.signing_key: signedjson.types.SigningKey = nacl.signing.SigningKey(  # type: ignore[assignment]
             SIGNING_KEY_SEED
         )
         self.signing_key.alg = KEY_ALG

tests/rest/key/v2/test_remote_key_resource.py

@@ -76,7 +76,7 @@ async def get_json(
                 "verify_keys": {
                     key_id: {
                         "key": signedjson.key.encode_verify_key_base64(
-                            signing_key.verify_key
+                            signedjson.key.get_verify_key(signing_key)
                         )
                     }
                 },
@@ -175,7 +175,7 @@ def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
                     % (
                         self.hs_signing_key.version,
                     ): signedjson.key.encode_verify_key_base64(
-                        self.hs_signing_key.verify_key
+                        signedjson.key.get_verify_key(self.hs_signing_key)
                     )
                 },
             }
@@ -229,7 +229,9 @@ def test_get_key(self) -> None:
         assert isinstance(keyres, FetchKeyResult)
         self.assertEqual(
             signedjson.key.encode_verify_key_base64(keyres.verify_key),
-            signedjson.key.encode_verify_key_base64(testkey.verify_key),
+            signedjson.key.encode_verify_key_base64(
+                signedjson.key.get_verify_key(testkey)
+            ),
         )
 
     def test_get_notary_key(self) -> None:
@@ -251,7 +253,9 @@ def test_get_notary_key(self) -> None:
         assert isinstance(keyres, FetchKeyResult)
         self.assertEqual(
             signedjson.key.encode_verify_key_base64(keyres.verify_key),
-            signedjson.key.encode_verify_key_base64(testkey.verify_key),
+            signedjson.key.encode_verify_key_base64(
+                signedjson.key.get_verify_key(testkey)
+            ),
         )
 
     def test_get_notary_keyserver_key(self) -> None:
@@ -268,5 +272,7 @@ def test_get_notary_keyserver_key(self) -> None:
         assert isinstance(keyres, FetchKeyResult)
         self.assertEqual(
             signedjson.key.encode_verify_key_base64(keyres.verify_key),
-            signedjson.key.encode_verify_key_base64(self.hs_signing_key.verify_key),
+            signedjson.key.encode_verify_key_base64(
+                signedjson.key.get_verify_key(self.hs_signing_key)
+            ),
         )