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Rename database classes to make some sense (#8033)

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Erik Johnston 2020-08-05 21:38:57 +01:00 • committed by GitHub
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# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
# Copyright 2019 New Vector Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Dict, List, Tuple
from canonicaljson import encode_canonical_json, json
from twisted.enterprise.adbapi import Connection
from twisted.internet import defer
from synapse.logging.opentracing import log_kv, set_tag, trace
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import make_in_list_sql_clause
from synapse.util.caches.descriptors import cached, cachedList
from synapse.util.iterutils import batch_iter
class EndToEndKeyWorkerStore(SQLBaseStore):
@trace
@defer.inlineCallbacks
def get_e2e_device_keys(
self, query_list, include_all_devices=False, include_deleted_devices=False
):
"""Fetch a list of device keys.
Args:
query_list(list): List of pairs of user_ids and device_ids.
include_all_devices (bool): whether to include entries for devices
that don't have device keys
include_deleted_devices (bool): whether to include null entries for
devices which no longer exist (but were in the query_list).
This option only takes effect if include_all_devices is true.
Returns:
Dict mapping from user-id to dict mapping from device_id to
key data. The key data will be a dict in the same format as the
DeviceKeys type returned by POST /_matrix/client/r0/keys/query.
"""
set_tag("query_list", query_list)
if not query_list:
return {}
results = yield self.db_pool.runInteraction(
"get_e2e_device_keys",
self._get_e2e_device_keys_txn,
query_list,
include_all_devices,
include_deleted_devices,
)
# Build the result structure, un-jsonify the results, and add the
# "unsigned" section
rv = {}
for user_id, device_keys in results.items():
rv[user_id] = {}
for device_id, device_info in device_keys.items():
r = db_to_json(device_info.pop("key_json"))
r["unsigned"] = {}
display_name = device_info["device_display_name"]
if display_name is not None:
r["unsigned"]["device_display_name"] = display_name
if "signatures" in device_info:
for sig_user_id, sigs in device_info["signatures"].items():
r.setdefault("signatures", {}).setdefault(
sig_user_id, {}
).update(sigs)
rv[user_id][device_id] = r
return rv
@trace
def _get_e2e_device_keys_txn(
self, txn, query_list, include_all_devices=False, include_deleted_devices=False
):
set_tag("include_all_devices", include_all_devices)
set_tag("include_deleted_devices", include_deleted_devices)
query_clauses = []
query_params = []
signature_query_clauses = []
signature_query_params = []
if include_all_devices is False:
include_deleted_devices = False
if include_deleted_devices:
deleted_devices = set(query_list)
for (user_id, device_id) in query_list:
query_clause = "user_id = ?"
query_params.append(user_id)
signature_query_clause = "target_user_id = ?"
signature_query_params.append(user_id)
if device_id is not None:
query_clause += " AND device_id = ?"
query_params.append(device_id)
signature_query_clause += " AND target_device_id = ?"
signature_query_params.append(device_id)
signature_query_clause += " AND user_id = ?"
signature_query_params.append(user_id)
query_clauses.append(query_clause)
signature_query_clauses.append(signature_query_clause)
sql = (
"SELECT user_id, device_id, "
" d.display_name AS device_display_name, "
" k.key_json"
" FROM devices d"
" %s JOIN e2e_device_keys_json k USING (user_id, device_id)"
" WHERE %s AND NOT d.hidden"
) % (
"LEFT" if include_all_devices else "INNER",
" OR ".join("(" + q + ")" for q in query_clauses),
)
txn.execute(sql, query_params)
rows = self.db_pool.cursor_to_dict(txn)
result = {}
for row in rows:
if include_deleted_devices:
deleted_devices.remove((row["user_id"], row["device_id"]))
result.setdefault(row["user_id"], {})[row["device_id"]] = row
if include_deleted_devices:
for user_id, device_id in deleted_devices:
result.setdefault(user_id, {})[device_id] = None
# get signatures on the device
signature_sql = ("SELECT * FROM e2e_cross_signing_signatures WHERE %s") % (
" OR ".join("(" + q + ")" for q in signature_query_clauses)
)
txn.execute(signature_sql, signature_query_params)
rows = self.db_pool.cursor_to_dict(txn)
# add each cross-signing signature to the correct device in the result dict.
for row in rows:
signing_user_id = row["user_id"]
signing_key_id = row["key_id"]
target_user_id = row["target_user_id"]
target_device_id = row["target_device_id"]
signature = row["signature"]
target_user_result = result.get(target_user_id)
if not target_user_result:
continue
target_device_result = target_user_result.get(target_device_id)
if not target_device_result:
# note that target_device_result will be None for deleted devices.
continue
target_device_signatures = target_device_result.setdefault("signatures", {})
signing_user_signatures = target_device_signatures.setdefault(
signing_user_id, {}
)
signing_user_signatures[signing_key_id] = signature
log_kv(result)
return result
@defer.inlineCallbacks
def get_e2e_one_time_keys(self, user_id, device_id, key_ids):
"""Retrieve a number of one-time keys for a user
Args:
user_id(str): id of user to get keys for
device_id(str): id of device to get keys for
key_ids(list[str]): list of key ids (excluding algorithm) to
retrieve
Returns:
deferred resolving to Dict[(str, str), str]: map from (algorithm,
key_id) to json string for key
"""
rows = yield self.db_pool.simple_select_many_batch(
table="e2e_one_time_keys_json",
column="key_id",
iterable=key_ids,
retcols=("algorithm", "key_id", "key_json"),
keyvalues={"user_id": user_id, "device_id": device_id},
desc="add_e2e_one_time_keys_check",
)
result = {(row["algorithm"], row["key_id"]): row["key_json"] for row in rows}
log_kv({"message": "Fetched one time keys for user", "one_time_keys": result})
return result
@defer.inlineCallbacks
def add_e2e_one_time_keys(self, user_id, device_id, time_now, new_keys):
"""Insert some new one time keys for a device. Errors if any of the
keys already exist.
Args:
user_id(str): id of user to get keys for
device_id(str): id of device to get keys for
time_now(long): insertion time to record (ms since epoch)
new_keys(iterable[(str, str, str)]: keys to add - each a tuple of
(algorithm, key_id, key json)
"""
def _add_e2e_one_time_keys(txn):
set_tag("user_id", user_id)
set_tag("device_id", device_id)
set_tag("new_keys", new_keys)
# 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.db_pool.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,
"ts_added_ms": time_now,
"key_json": json_bytes,
}
for algorithm, key_id, json_bytes in new_keys
],
)
self._invalidate_cache_and_stream(
txn, self.count_e2e_one_time_keys, (user_id, device_id)
)
yield self.db_pool.runInteraction(
"add_e2e_one_time_keys_insert", _add_e2e_one_time_keys
)
@cached(max_entries=10000)
def count_e2e_one_time_keys(self, user_id, device_id):
""" Count the number of one time keys the server has for a device
Returns:
Dict mapping from algorithm to number of keys for that algorithm.
"""
def _count_e2e_one_time_keys(txn):
sql = (
"SELECT algorithm, COUNT(key_id) FROM e2e_one_time_keys_json"
" WHERE user_id = ? AND device_id = ?"
" GROUP BY algorithm"
)
txn.execute(sql, (user_id, device_id))
result = {}
for algorithm, key_count in txn:
result[algorithm] = key_count
return result
return self.db_pool.runInteraction(
"count_e2e_one_time_keys", _count_e2e_one_time_keys
)
@defer.inlineCallbacks
def get_e2e_cross_signing_key(self, user_id, key_type, from_user_id=None):
"""Returns a user's cross-signing key.
Args:
user_id (str): the user whose key is being requested
key_type (str): the type of key that is being requested: either 'master'
for a master key, 'self_signing' for a self-signing key, or
'user_signing' for a user-signing key
from_user_id (str): if specified, signatures made by this user on
the self-signing key will be included in the result
Returns:
dict of the key data or None if not found
"""
res = yield self.get_e2e_cross_signing_keys_bulk([user_id], from_user_id)
user_keys = res.get(user_id)
if not user_keys:
return None
return user_keys.get(key_type)
@cached(num_args=1)
def _get_bare_e2e_cross_signing_keys(self, user_id):
"""Dummy function. Only used to make a cache for
_get_bare_e2e_cross_signing_keys_bulk.
"""
raise NotImplementedError()
@cachedList(
cached_method_name="_get_bare_e2e_cross_signing_keys",
list_name="user_ids",
num_args=1,
)
def _get_bare_e2e_cross_signing_keys_bulk(
self, user_ids: List[str]
) -> Dict[str, Dict[str, dict]]:
"""Returns the cross-signing keys for a set of users. The output of this
function should be passed to _get_e2e_cross_signing_signatures_txn if
the signatures for the calling user need to be fetched.
Args:
user_ids (list[str]): the users whose keys are being requested
Returns:
dict[str, dict[str, dict]]: mapping from user ID to key type to key
data. If a user's cross-signing keys were not found, either
their user ID will not be in the dict, or their user ID will map
to None.
"""
return self.db_pool.runInteraction(
"get_bare_e2e_cross_signing_keys_bulk",
self._get_bare_e2e_cross_signing_keys_bulk_txn,
user_ids,
)
def _get_bare_e2e_cross_signing_keys_bulk_txn(
self, txn: Connection, user_ids: List[str],
) -> Dict[str, Dict[str, dict]]:
"""Returns the cross-signing keys for a set of users. The output of this
function should be passed to _get_e2e_cross_signing_signatures_txn if
the signatures for the calling user need to be fetched.
Args:
txn (twisted.enterprise.adbapi.Connection): db connection
user_ids (list[str]): the users whose keys are being requested
Returns:
dict[str, dict[str, dict]]: mapping from user ID to key type to key
data. If a user's cross-signing keys were not found, their user
ID will not be in the dict.
"""
result = {}
for user_chunk in batch_iter(user_ids, 100):
clause, params = make_in_list_sql_clause(
txn.database_engine, "k.user_id", user_chunk
)
sql = (
"""
SELECT k.user_id, k.keytype, k.keydata, k.stream_id
FROM e2e_cross_signing_keys k
INNER JOIN (SELECT user_id, keytype, MAX(stream_id) AS stream_id
FROM e2e_cross_signing_keys
GROUP BY user_id, keytype) s
USING (user_id, stream_id, keytype)
WHERE
"""
+ clause
)
txn.execute(sql, params)
rows = self.db_pool.cursor_to_dict(txn)
for row in rows:
user_id = row["user_id"]
key_type = row["keytype"]
key = db_to_json(row["keydata"])
user_info = result.setdefault(user_id, {})
user_info[key_type] = key
return result
def _get_e2e_cross_signing_signatures_txn(
self, txn: Connection, keys: Dict[str, Dict[str, dict]], from_user_id: str,
) -> Dict[str, Dict[str, dict]]:
"""Returns the cross-signing signatures made by a user on a set of keys.
Args:
txn (twisted.enterprise.adbapi.Connection): db connection
keys (dict[str, dict[str, dict]]): a map of user ID to key type to
key data. This dict will be modified to add signatures.
from_user_id (str): fetch the signatures made by this user
Returns:
dict[str, dict[str, dict]]: mapping from user ID to key type to key
data. The return value will be the same as the keys argument,
with the modifications included.
"""
# find out what cross-signing keys (a.k.a. devices) we need to get
# signatures for. This is a map of (user_id, device_id) to key type
# (device_id is the key's public part).
devices = {}
for user_id, user_info in keys.items():
if user_info is None:
continue
for key_type, key in user_info.items():
device_id = None
for k in key["keys"].values():
device_id = k
devices[(user_id, device_id)] = key_type
for batch in batch_iter(devices.keys(), size=100):
sql = """
SELECT target_user_id, target_device_id, key_id, signature
FROM e2e_cross_signing_signatures
WHERE user_id = ?
AND (%s)
""" % (
" OR ".join(
"(target_user_id = ? AND target_device_id = ?)" for _ in batch
)
)
query_params = [from_user_id]
for item in batch:
# item is a (user_id, device_id) tuple
query_params.extend(item)
txn.execute(sql, query_params)
rows = self.db_pool.cursor_to_dict(txn)
# and add the signatures to the appropriate keys
for row in rows:
key_id = row["key_id"]
target_user_id = row["target_user_id"]
target_device_id = row["target_device_id"]
key_type = devices[(target_user_id, target_device_id)]
# We need to copy everything, because the result may have come
# from the cache. dict.copy only does a shallow copy, so we
# need to recursively copy the dicts that will be modified.
user_info = keys[target_user_id] = keys[target_user_id].copy()
target_user_key = user_info[key_type] = user_info[key_type].copy()
if "signatures" in target_user_key:
signatures = target_user_key["signatures"] = target_user_key[
"signatures"
].copy()
if from_user_id in signatures:
user_sigs = signatures[from_user_id] = signatures[from_user_id]
user_sigs[key_id] = row["signature"]
else:
signatures[from_user_id] = {key_id: row["signature"]}
else:
target_user_key["signatures"] = {
from_user_id: {key_id: row["signature"]}
}
return keys
@defer.inlineCallbacks
def get_e2e_cross_signing_keys_bulk(
self, user_ids: List[str], from_user_id: str = None
) -> defer.Deferred:
"""Returns the cross-signing keys for a set of users.
Args:
user_ids (list[str]): the users whose keys are being requested
from_user_id (str): if specified, signatures made by this user on
the self-signing keys will be included in the result
Returns:
Deferred[dict[str, dict[str, dict]]]: map of user ID to key type to
key data. If a user's cross-signing keys were not found, either
their user ID will not be in the dict, or their user ID will map
to None.
"""
result = yield self._get_bare_e2e_cross_signing_keys_bulk(user_ids)
if from_user_id:
result = yield self.db_pool.runInteraction(
"get_e2e_cross_signing_signatures",
self._get_e2e_cross_signing_signatures_txn,
result,
from_user_id,
)
return result
async def get_all_user_signature_changes_for_remotes(
self, instance_name: str, last_id: int, current_id: int, limit: int
) -> Tuple[List[Tuple[int, tuple]], int, bool]:
"""Get updates for groups replication stream.
Note that the user signature stream represents when a user signs their
device with their user-signing key, which is not published to other
users or servers, so no `destination` is needed in the returned
list. However, this is needed to poke workers.
Args:
instance_name: The writer we want to fetch updates from. Unused
here since there is only ever one writer.
last_id: The token to fetch updates from. Exclusive.
current_id: The token to fetch updates up to. Inclusive.
limit: The requested limit for the number of rows to return. The
function may return more or fewer rows.
Returns:
A tuple consisting of: the updates, a token to use to fetch
subsequent updates, and whether we returned fewer rows than exists
between the requested tokens due to the limit.
The token returned can be used in a subsequent call to this
function to get further updatees.
The updates are a list of 2-tuples of stream ID and the row data
"""
if last_id == current_id:
return [], current_id, False
def _get_all_user_signature_changes_for_remotes_txn(txn):
sql = """
SELECT stream_id, from_user_id AS user_id
FROM user_signature_stream
WHERE ? < stream_id AND stream_id <= ?
ORDER BY stream_id ASC
LIMIT ?
"""
txn.execute(sql, (last_id, current_id, limit))
updates = [(row[0], (row[1:])) for row in txn]
limited = False
upto_token = current_id
if len(updates) >= limit:
upto_token = updates[-1][0]
limited = True
return updates, upto_token, limited
return await self.db_pool.runInteraction(
"get_all_user_signature_changes_for_remotes",
_get_all_user_signature_changes_for_remotes_txn,
)
class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore):
def set_e2e_device_keys(self, user_id, device_id, time_now, device_keys):
"""Stores device keys for a device. Returns whether there was a change
or the keys were already in the database.
"""
def _set_e2e_device_keys_txn(txn):
set_tag("user_id", user_id)
set_tag("device_id", device_id)
set_tag("time_now", time_now)
set_tag("device_keys", device_keys)
old_key_json = self.db_pool.simple_select_one_onecol_txn(
txn,
table="e2e_device_keys_json",
keyvalues={"user_id": user_id, "device_id": device_id},
retcol="key_json",
allow_none=True,
)
# In py3 we need old_key_json to match new_key_json type. The DB
# returns unicode while encode_canonical_json returns bytes.
new_key_json = encode_canonical_json(device_keys).decode("utf-8")
if old_key_json == new_key_json:
log_kv({"Message": "Device key already stored."})
return False
self.db_pool.simple_upsert_txn(
txn,
table="e2e_device_keys_json",
keyvalues={"user_id": user_id, "device_id": device_id},
values={"ts_added_ms": time_now, "key_json": new_key_json},
)
log_kv({"message": "Device keys stored."})
return True
return self.db_pool.runInteraction(
"set_e2e_device_keys", _set_e2e_device_keys_txn
)
def claim_e2e_one_time_keys(self, query_list):
"""Take a list of one time keys out of the database"""
@trace
def _claim_e2e_one_time_keys(txn):
sql = (
"SELECT key_id, key_json FROM e2e_one_time_keys_json"
" WHERE user_id = ? AND device_id = ? AND algorithm = ?"
" LIMIT 1"
)
result = {}
delete = []
for user_id, device_id, algorithm in query_list:
user_result = result.setdefault(user_id, {})
device_result = user_result.setdefault(device_id, {})
txn.execute(sql, (user_id, device_id, algorithm))
for key_id, key_json in txn:
device_result[algorithm + ":" + key_id] = key_json
delete.append((user_id, device_id, algorithm, key_id))
sql = (
"DELETE FROM e2e_one_time_keys_json"
" WHERE user_id = ? AND device_id = ? AND algorithm = ?"
" AND key_id = ?"
)
for user_id, device_id, algorithm, key_id in delete:
log_kv(
{
"message": "Executing claim e2e_one_time_keys transaction on database."
}
)
txn.execute(sql, (user_id, device_id, algorithm, key_id))
log_kv({"message": "finished executing and invalidating cache"})
self._invalidate_cache_and_stream(
txn, self.count_e2e_one_time_keys, (user_id, device_id)
)
return result
return self.db_pool.runInteraction(
"claim_e2e_one_time_keys", _claim_e2e_one_time_keys
)
def delete_e2e_keys_by_device(self, user_id, device_id):
def delete_e2e_keys_by_device_txn(txn):
log_kv(
{
"message": "Deleting keys for device",
"device_id": device_id,
"user_id": user_id,
}
)
self.db_pool.simple_delete_txn(
txn,
table="e2e_device_keys_json",
keyvalues={"user_id": user_id, "device_id": device_id},
)
self.db_pool.simple_delete_txn(
txn,
table="e2e_one_time_keys_json",
keyvalues={"user_id": user_id, "device_id": device_id},
)
self._invalidate_cache_and_stream(
txn, self.count_e2e_one_time_keys, (user_id, device_id)
)
return self.db_pool.runInteraction(
"delete_e2e_keys_by_device", delete_e2e_keys_by_device_txn
)
def _set_e2e_cross_signing_key_txn(self, txn, user_id, key_type, key):
"""Set a user's cross-signing key.
Args:
txn (twisted.enterprise.adbapi.Connection): db connection
user_id (str): the user to set the signing key for
key_type (str): the type of key that is being set: either 'master'
for a master key, 'self_signing' for a self-signing key, or
'user_signing' for a user-signing key
key (dict): the key data
"""
# the 'key' dict will look something like:
# {
# "user_id": "@alice:example.com",
# "usage": ["self_signing"],
# "keys": {
# "ed25519:base64+self+signing+public+key": "base64+self+signing+public+key",
# },
# "signatures": {
# "@alice:example.com": {
# "ed25519:base64+master+public+key": "base64+signature"
# }
# }
# }
# The "keys" property must only have one entry, which will be the public
# key, so we just grab the first value in there
pubkey = next(iter(key["keys"].values()))
# The cross-signing keys need to occupy the same namespace as devices,
# since signatures are identified by device ID. So add an entry to the
# device table to make sure that we don't have a collision with device
# IDs.
# We only need to do this for local users, since remote servers should be
# responsible for checking this for their own users.
if self.hs.is_mine_id(user_id):
self.db_pool.simple_insert_txn(
txn,
"devices",
values={
"user_id": user_id,
"device_id": pubkey,
"display_name": key_type + " signing key",
"hidden": True,
},
)
# and finally, store the key itself
with self._cross_signing_id_gen.get_next() as stream_id:
self.db_pool.simple_insert_txn(
txn,
"e2e_cross_signing_keys",
values={
"user_id": user_id,
"keytype": key_type,
"keydata": json.dumps(key),
"stream_id": stream_id,
},
)
self._invalidate_cache_and_stream(
txn, self._get_bare_e2e_cross_signing_keys, (user_id,)
)
def set_e2e_cross_signing_key(self, user_id, key_type, key):
"""Set a user's cross-signing key.
Args:
user_id (str): the user to set the user-signing key for
key_type (str): the type of cross-signing key to set
key (dict): the key data
"""
return self.db_pool.runInteraction(
"add_e2e_cross_signing_key",
self._set_e2e_cross_signing_key_txn,
user_id,
key_type,
key,
)
def store_e2e_cross_signing_signatures(self, user_id, signatures):
"""Stores cross-signing signatures.
Args:
user_id (str): the user who made the signatures
signatures (iterable[SignatureListItem]): signatures to add
"""
return self.db_pool.simple_insert_many(
"e2e_cross_signing_signatures",
[
{
"user_id": user_id,
"key_id": item.signing_key_id,
"target_user_id": item.target_user_id,
"target_device_id": item.target_device_id,
"signature": item.signature,
}
for item in signatures
],
"add_e2e_signing_key",
)