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Add type hints to synapse/storage/databases/main/e2e_room_keys.py (#11549)

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Sean Quah 2021-12-14 17:46:47 +00:00 • committed by GitHub
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synapse/storage/databases/main/e2e_room_keys.py
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@ -13,35 +13,71 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Optional
from typing import Dict, Iterable, Mapping, Optional, Tuple, cast
from typing_extensions import Literal, TypedDict
from synapse.api.errors import StoreError
from synapse.logging.opentracing import log_kv, trace
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import LoggingTransaction
from synapse.types import JsonDict, JsonSerializable
from synapse.util import json_encoder
class RoomKey(TypedDict):
"""`KeyBackupData` in the Matrix spec.
https://spec.matrix.org/v1.1/client-server-api/#get_matrixclientv3room_keyskeysroomidsessionid
"""
first_message_index: int
forwarded_count: int
is_verified: bool
session_data: JsonSerializable
class EndToEndRoomKeyStore(SQLBaseStore):
"""The store for end to end room key backups.
See https://spec.matrix.org/v1.1/client-server-api/#server-side-key-backups
As per the spec, backups are identified by an opaque version string. Internally,
version identifiers are assigned using incrementing integers. Non-numeric version
strings are treated as if they do not exist, since we would have never issued them.
"""
async def update_e2e_room_key(
self, user_id, version, room_id, session_id, room_key
):
self,
user_id: str,
version: str,
room_id: str,
session_id: str,
room_key: RoomKey,
) -> None:
"""Replaces the encrypted E2E room key for a given session in a given backup
Args:
user_id(str): the user whose backup we're setting
version(str): the version ID of the backup we're updating
room_id(str): the ID of the room whose keys we're setting
session_id(str): the session whose room_key we're setting
room_key(dict): the room_key being set
user_id: the user whose backup we're setting
version: the version ID of the backup we're updating
room_id: the ID of the room whose keys we're setting
session_id: the session whose room_key we're setting
room_key: the room_key being set
Raises:
StoreError
"""
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
raise StoreError(404, "No backup with that version exists")
await self.db_pool.simple_update_one(
table="e2e_room_keys",
keyvalues={
"user_id": user_id,
"version": version,
"version": version_int,
"room_id": room_id,
"session_id": session_id,
},
@ -54,22 +90,29 @@ class EndToEndRoomKeyStore(SQLBaseStore):
desc="update_e2e_room_key",
)
async def add_e2e_room_keys(self, user_id, version, room_keys):
async def add_e2e_room_keys(
self, user_id: str, version: str, room_keys: Iterable[Tuple[str, str, RoomKey]]
) -> None:
"""Bulk add room keys to a given backup.
Args:
user_id (str): the user whose backup we're adding to
version (str): the version ID of the backup for the set of keys we're adding to
room_keys (iterable[(str, str, dict)]): the keys to add, in the form
(roomID, sessionID, keyData)
user_id: the user whose backup we're adding to
version: the version ID of the backup for the set of keys we're adding to
room_keys: the keys to add, in the form (roomID, sessionID, keyData)
"""
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
raise StoreError(404, "No backup with that version exists")
values = []
for (room_id, session_id, room_key) in room_keys:
values.append(
{
"user_id": user_id,
"version": version,
"version": version_int,
"room_id": room_id,
"session_id": session_id,
"first_message_index": room_key["first_message_index"],
@ -92,31 +135,39 @@ class EndToEndRoomKeyStore(SQLBaseStore):
)
@trace
async def get_e2e_room_keys(self, user_id, version, room_id=None, session_id=None):
async def get_e2e_room_keys(
self,
user_id: str,
version: str,
room_id: Optional[str] = None,
session_id: Optional[str] = None,
) -> Dict[
Literal["rooms"], Dict[str, Dict[Literal["sessions"], Dict[str, RoomKey]]]
]:
"""Bulk get the E2E room keys for a given backup, optionally filtered to a given
room, or a given session.
Args:
user_id (str): the user whose backup we're querying
version (str): the version ID of the backup for the set of keys we're querying
room_id (str): Optional. the ID of the room whose keys we're querying, if any.
user_id: the user whose backup we're querying
version: the version ID of the backup for the set of keys we're querying
room_id: Optional. the ID of the room whose keys we're querying, if any.
If not specified, we return the keys for all the rooms in the backup.
session_id (str): Optional. the session whose room_key we're querying, if any.
session_id: Optional. the session whose room_key we're querying, if any.
If specified, we also require the room_id to be specified.
If not specified, we return all the keys in this version of
the backup (or for the specified room)
Returns:
A list of dicts giving the session_data and message metadata for
these room keys.
A dict giving the session_data and message metadata for these room keys.
`{"rooms": {room_id: {"sessions": {session_id: room_key}}}}`
"""
try:
version = int(version)
version_int = int(version)
except ValueError:
return {"rooms": {}}
keyvalues = {"user_id": user_id, "version": version}
keyvalues = {"user_id": user_id, "version": version_int}
if room_id:
keyvalues["room_id"] = room_id
if session_id:
@ -137,7 +188,9 @@ class EndToEndRoomKeyStore(SQLBaseStore):
desc="get_e2e_room_keys",
)
sessions = {"rooms": {}}
sessions: Dict[
Literal["rooms"], Dict[str, Dict[Literal["sessions"], Dict[str, RoomKey]]]
] = {"rooms": {}}
for row in rows:
room_entry = sessions["rooms"].setdefault(row["room_id"], {"sessions": {}})
room_entry["sessions"][row["session_id"]] = {
@ -150,7 +203,12 @@ class EndToEndRoomKeyStore(SQLBaseStore):
return sessions
async def get_e2e_room_keys_multi(self, user_id, version, room_keys):
async def get_e2e_room_keys_multi(
self,
user_id: str,
version: str,
room_keys: Mapping[str, Mapping[Literal["sessions"], Iterable[str]]],
) -> Dict[str, Dict[str, RoomKey]]:
"""Get multiple room keys at a time. The difference between this function and
get_e2e_room_keys is that this function can be used to retrieve
multiple specific keys at a time, whereas get_e2e_room_keys is used for
@ -158,26 +216,36 @@ class EndToEndRoomKeyStore(SQLBaseStore):
specific key.
Args:
user_id (str): the user whose backup we're querying
version (str): the version ID of the backup we're querying about
room_keys (dict[str, dict[str, iterable[str]]]): a map from
room ID -> {"session": [session ids]} indicating the session IDs
that we want to query
user_id: the user whose backup we're querying
version: the version ID of the backup we're querying about
room_keys: a map from room ID -> {"sessions": [session ids]}
indicating the session IDs that we want to query
Returns:
dict[str, dict[str, dict]]: a map of room IDs to session IDs to room key
A map of room IDs to session IDs to room key
"""
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
return {}
return await self.db_pool.runInteraction(
"get_e2e_room_keys_multi",
self._get_e2e_room_keys_multi_txn,
user_id,
version,
version_int,
room_keys,
)
@staticmethod
def _get_e2e_room_keys_multi_txn(txn, user_id, version, room_keys):
def _get_e2e_room_keys_multi_txn(
txn: LoggingTransaction,
user_id: str,
version: int,
room_keys: Mapping[str, Mapping[Literal["sessions"], Iterable[str]]],
) -> Dict[str, Dict[str, RoomKey]]:
if not room_keys:
return {}
@ -209,7 +277,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
txn.execute(sql, params)
ret = {}
ret: Dict[str, Dict[str, RoomKey]] = {}
for row in txn:
room_id = row[0]
@ -231,36 +299,49 @@ class EndToEndRoomKeyStore(SQLBaseStore):
user_id: the user whose backup we're querying
version: the version ID of the backup we're querying about
"""
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
return 0
return await self.db_pool.simple_select_one_onecol(
table="e2e_room_keys",
keyvalues={"user_id": user_id, "version": version},
keyvalues={"user_id": user_id, "version": version_int},
retcol="COUNT(*)",
desc="count_e2e_room_keys",
)
@trace
async def delete_e2e_room_keys(
self, user_id, version, room_id=None, session_id=None
):
self,
user_id: str,
version: str,
room_id: Optional[str] = None,
session_id: Optional[str] = None,
) -> None:
"""Bulk delete the E2E room keys for a given backup, optionally filtered to a given
room or a given session.
Args:
user_id(str): the user whose backup we're deleting from
version(str): the version ID of the backup for the set of keys we're deleting
room_id(str): Optional. the ID of the room whose keys we're deleting, if any.
user_id: the user whose backup we're deleting from
version: the version ID of the backup for the set of keys we're deleting
room_id: Optional. the ID of the room whose keys we're deleting, if any.
If not specified, we delete the keys for all the rooms in the backup.
session_id(str): Optional. the session whose room_key we're querying, if any.
session_id: Optional. the session whose room_key we're querying, if any.
If specified, we also require the room_id to be specified.
If not specified, we delete all the keys in this version of
the backup (or for the specified room)
Returns:
The deletion transaction
"""
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
return
keyvalues = {"user_id": user_id, "version": int(version)}
keyvalues = {"user_id": user_id, "version": version_int}
if room_id:
keyvalues["room_id"] = room_id
if session_id:
@ -271,23 +352,27 @@ class EndToEndRoomKeyStore(SQLBaseStore):
)
@staticmethod
def _get_current_version(txn, user_id):
def _get_current_version(txn: LoggingTransaction, user_id: str) -> int:
txn.execute(
"SELECT MAX(version) FROM e2e_room_keys_versions "
"WHERE user_id=? AND deleted=0",
(user_id,),
)
row = txn.fetchone()
if not row:
# `SELECT MAX() FROM ...` will always return 1 row. The value in that row will
# be `NULL` when there are no available versions.
row = cast(Tuple[Optional[int]], txn.fetchone())
if row[0] is None:
raise StoreError(404, "No current backup version")
return row[0]
async def get_e2e_room_keys_version_info(self, user_id, version=None):
async def get_e2e_room_keys_version_info(
self, user_id: str, version: Optional[str] = None
) -> JsonDict:
"""Get info metadata about a version of our room_keys backup.
Args:
user_id(str): the user whose backup we're querying
version(str): Optional. the version ID of the backup we're querying about
user_id: the user whose backup we're querying
version: Optional. the version ID of the backup we're querying about
If missing, we return the information about the current version.
Raises:
StoreError: with code 404 if there are no e2e_room_keys_versions present
@ -300,7 +385,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
etag(int): tag of the keys in the backup
"""
def _get_e2e_room_keys_version_info_txn(txn):
def _get_e2e_room_keys_version_info_txn(txn: LoggingTransaction) -> JsonDict:
if version is None:
this_version = self._get_current_version(txn, user_id)
else:
@ -309,14 +394,16 @@ class EndToEndRoomKeyStore(SQLBaseStore):
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it isn't there.
raise StoreError(404, "No row found")
raise StoreError(404, "No backup with that version exists")
result = self.db_pool.simple_select_one_txn(
txn,
table="e2e_room_keys_versions",
keyvalues={"user_id": user_id, "version": this_version, "deleted": 0},
retcols=("version", "algorithm", "auth_data", "etag"),
allow_none=False,
)
assert result is not None # see comment on `simple_select_one_txn`
result["auth_data"] = db_to_json(result["auth_data"])
result["version"] = str(result["version"])
if result["etag"] is None:
@ -328,28 +415,28 @@ class EndToEndRoomKeyStore(SQLBaseStore):
)
@trace
async def create_e2e_room_keys_version(self, user_id: str, info: dict) -> str:
async def create_e2e_room_keys_version(self, user_id: str, info: JsonDict) -> str:
"""Atomically creates a new version of this user's e2e_room_keys store
with the given version info.
Args:
user_id(str): the user whose backup we're creating a version
info(dict): the info about the backup version to be created
user_id: the user whose backup we're creating a version
info: the info about the backup version to be created
Returns:
The newly created version ID
"""
def _create_e2e_room_keys_version_txn(txn):
def _create_e2e_room_keys_version_txn(txn: LoggingTransaction) -> str:
txn.execute(
"SELECT MAX(version) FROM e2e_room_keys_versions WHERE user_id=?",
(user_id,),
)
current_version = txn.fetchone()[0]
current_version = cast(Tuple[Optional[int]], txn.fetchone())[0]
if current_version is None:
current_version = "0"
current_version = 0
new_version = str(int(current_version) + 1)
new_version = current_version + 1
self.db_pool.simple_insert_txn(
txn,
@ -362,7 +449,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
},
)
return new_version
return str(new_version)
return await self.db_pool.runInteraction(
"create_e2e_room_keys_version_txn", _create_e2e_room_keys_version_txn
@ -373,7 +460,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
self,
user_id: str,
version: str,
info: Optional[dict] = None,
info: Optional[JsonDict] = None,
version_etag: Optional[int] = None,
) -> None:
"""Update a given backup version
@ -386,7 +473,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
version_etag: etag of the keys in the backup. If None, then the etag
is not updated.
"""
updatevalues = {}
updatevalues: Dict[str, object] = {}
if info is not None and "auth_data" in info:
updatevalues["auth_data"] = json_encoder.encode(info["auth_data"])
@ -394,9 +481,16 @@ class EndToEndRoomKeyStore(SQLBaseStore):
updatevalues["etag"] = version_etag
if updatevalues:
await self.db_pool.simple_update(
try:
version_int = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it doesn't exist.
raise StoreError(404, "No backup with that version exists")
await self.db_pool.simple_update_one(
table="e2e_room_keys_versions",
keyvalues={"user_id": user_id, "version": version},
keyvalues={"user_id": user_id, "version": version_int},
updatevalues=updatevalues,
desc="update_e2e_room_keys_version",
)
@ -417,13 +511,16 @@ class EndToEndRoomKeyStore(SQLBaseStore):
or if the version requested doesn't exist.
"""
def _delete_e2e_room_keys_version_txn(txn):
def _delete_e2e_room_keys_version_txn(txn: LoggingTransaction) -> None:
if version is None:
this_version = self._get_current_version(txn, user_id)
if this_version is None:
raise StoreError(404, "No current backup version")
else:
this_version = version
try:
this_version = int(version)
except ValueError:
# Our versions are all ints so if we can't convert it to an integer,
# it isn't there.
raise StoreError(404, "No backup with that version exists")
self.db_pool.simple_delete_txn(
txn,