Keep fallback key marked as used if it's re-uploaded (#11382)

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Hubert Chathi 2021-11-19 06:40:12 -05:00 committed by GitHub
parent e2e9bea1ce
commit eca7cffb73
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3 changed files with 72 additions and 12 deletions

1
changelog.d/11382.misc Normal file
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@ -0,0 +1 @@
Keep fallback key marked as used if it's re-uploaded.

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@ -408,29 +408,58 @@ class EndToEndKeyWorkerStore(EndToEndKeyBackgroundStore):
fallback_keys: the keys to set. This is a map from key ID (which is
of the form "algorithm:id") to key data.
"""
await self.db_pool.runInteraction(
"set_e2e_fallback_keys_txn",
self._set_e2e_fallback_keys_txn,
user_id,
device_id,
fallback_keys,
)
await self.invalidate_cache_and_stream(
"get_e2e_unused_fallback_key_types", (user_id, device_id)
)
def _set_e2e_fallback_keys_txn(
self, txn: Connection, user_id: str, device_id: str, fallback_keys: JsonDict
) -> None:
# fallback_keys will usually only have one item in it, so using a for
# loop (as opposed to calling simple_upsert_many_txn) won't be too bad
# FIXME: make sure that only one key per algorithm is uploaded
for key_id, fallback_key in fallback_keys.items():
algorithm, key_id = key_id.split(":", 1)
await self.db_pool.simple_upsert(
"e2e_fallback_keys_json",
old_key_json = self.db_pool.simple_select_one_onecol_txn(
txn,
table="e2e_fallback_keys_json",
keyvalues={
"user_id": user_id,
"device_id": device_id,
"algorithm": algorithm,
},
values={
"key_id": key_id,
"key_json": json_encoder.encode(fallback_key),
"used": False,
},
desc="set_e2e_fallback_key",
retcol="key_json",
allow_none=True,
)
await self.invalidate_cache_and_stream(
"get_e2e_unused_fallback_key_types", (user_id, device_id)
)
new_key_json = encode_canonical_json(fallback_key).decode("utf-8")
# If the uploaded key is the same as the current fallback key,
# don't do anything. This prevents marking the key as unused if it
# was already used.
if old_key_json != new_key_json:
self.db_pool.simple_upsert_txn(
txn,
table="e2e_fallback_keys_json",
keyvalues={
"user_id": user_id,
"device_id": device_id,
"algorithm": algorithm,
},
values={
"key_id": key_id,
"key_json": json_encoder.encode(fallback_key),
"used": False,
},
)
@cached(max_entries=10000)
async def get_e2e_unused_fallback_key_types(

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@ -162,6 +162,7 @@ class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
fallback_key = {"alg1:k1": "key1"}
fallback_key2 = {"alg1:k2": "key2"}
otk = {"alg1:k2": "key2"}
# we shouldn't have any unused fallback keys yet
@ -213,6 +214,35 @@ class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# re-uploading the same fallback key should still result in no unused fallback
# keys
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"org.matrix.msc2732.fallback_keys": fallback_key},
)
)
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, [])
# uploading a new fallback key should result in an unused fallback key
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"org.matrix.msc2732.fallback_keys": fallback_key2},
)
)
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, ["alg1"])
# if the user uploads a one-time key, the next claim should fetch the
# one-time key, and then go back to the fallback
self.get_success(
@ -238,7 +268,7 @@ class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
)
self.assertEqual(
res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key2}}},
)
def test_replace_master_key(self):