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Don't reuse backup versions

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Since we don't actually delete the keys, just mark the versions
as deleted in the db rather than actually deleting them, then we
won't reuse versions.

Fixes https://github.com/vector-im/riot-web/issues/7448
This commit is contained in:
David Baker 2018-10-05 15:08:36 +01:00
parent bc74925c5b
commit 497444f1fd
2 changed files with 9 additions and 3 deletions
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9
synapse/storage/e2e_room_keys.py
View file

@ -193,7 +193,8 @@ class EndToEndRoomKeyStore(SQLBaseStore):
@staticmethod
def _get_current_version(txn, user_id):
txn.execute(
"SELECT MAX(version) FROM e2e_room_keys_versions WHERE user_id=?",
"SELECT MAX(version) FROM e2e_room_keys_versions "
"WHERE user_id=? AND deleted=0",
(user_id,)
)
row = txn.fetchone()
@ -226,6 +227,7 @@ class EndToEndRoomKeyStore(SQLBaseStore):
keyvalues={
"user_id": user_id,
"version": this_version,
"deleted": 0,
},
retcols=(
"version",
@ -300,13 +302,16 @@ class EndToEndRoomKeyStore(SQLBaseStore):
else:
this_version = version
return self._simple_delete_one_txn(
return self._simple_update_one_txn(
txn,
table="e2e_room_keys_versions",
keyvalues={
"user_id": user_id,
"version": this_version,
},
updatevalues={
"deleted": 1,
}
)
return self.runInteraction(

3
synapse/storage/schema/delta/51/e2e_room_keys.sql
View file

@ -32,7 +32,8 @@ CREATE TABLE e2e_room_keys_versions (
user_id TEXT NOT NULL,
version TEXT NOT NULL,
algorithm TEXT NOT NULL,
auth_data TEXT NOT NULL
auth_data TEXT NOT NULL,
deleted SMALLINT DEFAULT 0 NOT NULL
);
CREATE UNIQUE INDEX e2e_room_keys_versions_idx ON e2e_room_keys_versions(user_id, version);