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Don't user upsert to persist new one time keys

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Instead we no-op duplicate one time key uploads, an error if the key_id
already exists but encodes a different key.
This commit is contained in:
Erik Johnston 2017-03-23 13:17:00 +00:00
parent 59358cd3e7
commit e64655c25d
1 changed files with 48 additions and 9 deletions
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57
synapse/storage/end_to_end_keys.py
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@ -120,24 +120,63 @@ class EndToEndKeyStore(SQLBaseStore):
return result
@defer.inlineCallbacks
def add_e2e_one_time_keys(self, user_id, device_id, time_now, key_list):
"""Insert some new one time keys for a device.
Checks if any of the keys are already inserted, if they are then check
if they match. If they don't then we raise an error.
"""
# First we check if we have already persisted any of the keys.
rows = yield self._simple_select_many_batch(
table="e2e_one_time_keys_json",
column="key_id",
iterable=[key_id for _, key_id, _ in key_list],
retcols=("algorithm", "key_id", "key_json",),
keyvalues={
"user_id": user_id,
"device_id": device_id,
},
desc="add_e2e_one_time_keys_check",
)
existing_key_map = {
row["key_id"]: (row["algorithm"], row["key_json"]) for row in rows
}
new_keys = [] # Keys that we need to insert
for algorithm, key_id, json_bytes in key_list:
if key_id in existing_key_map:
ex_algo, ex_bytes = existing_key_map[key_id]
if algorithm != ex_algo or json_bytes != ex_bytes:
raise Exception(
"One time key with key_id %r already exists" % (key_id,)
)
else:
new_keys.append((algorithm, key_id, json_bytes))
def _add_e2e_one_time_keys(txn):
for (algorithm, key_id, json_bytes) in key_list:
self._simple_upsert_txn(
txn, table="e2e_one_time_keys_json",
keyvalues={
# We are protected from race between lookup and insertion due to
# a unique constraint. If there is a race of two calls to
# `add_e2e_one_time_keys` then they'll conflict and we will only
# insert one set.
self._simple_insert_many_txn(
txn, table="e2e_one_time_keys_json",
values=[
{
"user_id": user_id,
"device_id": device_id,
"algorithm": algorithm,
"key_id": key_id,
},
values={
"ts_added_ms": time_now,
"key_json": json_bytes,
}
)
return self.runInteraction(
"add_e2e_one_time_keys", _add_e2e_one_time_keys
for algorithm, key_id, json_bytes in new_keys
],
)
yield self.runInteraction(
"add_e2e_one_time_keys_insert", _add_e2e_one_time_keys
)
def count_e2e_one_time_keys(self, user_id, device_id):