mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
33300673b7
This means that following the same link across multiple sessions or devices can re-use the same guest account. Note that this is somewhat of an abuse vector; we can't throw up captchas on this flow, so this is a way of registering ephemeral accounts for spam, whose sign-up we don't rate limit.
434 lines
14 KiB
Python
434 lines
14 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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from twisted.internet import defer
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from synapse.api.errors import StoreError, Codes
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from ._base import SQLBaseStore
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from synapse.util.caches.descriptors import cached, cachedInlineCallbacks, cachedList
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class RegistrationStore(SQLBaseStore):
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def __init__(self, hs):
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super(RegistrationStore, self).__init__(hs)
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self.clock = hs.get_clock()
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@defer.inlineCallbacks
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def add_access_token_to_user(self, user_id, token):
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"""Adds an access token for the given user.
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Args:
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user_id (str): The user ID.
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token (str): The new access token to add.
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Raises:
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StoreError if there was a problem adding this.
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"""
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next_id = yield self._access_tokens_id_gen.get_next()
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yield self._simple_insert(
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"access_tokens",
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{
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"id": next_id,
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"user_id": user_id,
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"token": token
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},
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desc="add_access_token_to_user",
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)
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@defer.inlineCallbacks
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def add_refresh_token_to_user(self, user_id, token):
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"""Adds a refresh token for the given user.
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Args:
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user_id (str): The user ID.
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token (str): The new refresh token to add.
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Raises:
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StoreError if there was a problem adding this.
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"""
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next_id = yield self._refresh_tokens_id_gen.get_next()
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yield self._simple_insert(
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"refresh_tokens",
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{
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"id": next_id,
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"user_id": user_id,
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"token": token
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},
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desc="add_refresh_token_to_user",
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)
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@defer.inlineCallbacks
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def register(self, user_id, token, password_hash,
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was_guest=False, make_guest=False):
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"""Attempts to register an account.
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Args:
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user_id (str): The desired user ID to register.
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token (str): The desired access token to use for this user.
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password_hash (str): Optional. The password hash for this user.
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was_guest (bool): Optional. Whether this is a guest account being
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upgraded to a non-guest account.
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make_guest (boolean): True if the the new user should be guest,
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false to add a regular user account.
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Raises:
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StoreError if the user_id could not be registered.
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"""
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yield self.runInteraction(
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"register",
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self._register, user_id, token, password_hash, was_guest, make_guest
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)
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self.is_guest.invalidate((user_id,))
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def _register(self, txn, user_id, token, password_hash, was_guest, make_guest):
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now = int(self.clock.time())
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next_id = self._access_tokens_id_gen.get_next_txn(txn)
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try:
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if was_guest:
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txn.execute("UPDATE users SET"
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" password_hash = ?,"
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" upgrade_ts = ?,"
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" is_guest = ?"
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" WHERE name = ?",
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[password_hash, now, 1 if make_guest else 0, user_id])
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else:
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txn.execute("INSERT INTO users "
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"(name, password_hash, creation_ts, is_guest) "
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"VALUES (?,?,?,?)",
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[user_id, password_hash, now, 1 if make_guest else 0])
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except self.database_engine.module.IntegrityError:
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raise StoreError(
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400, "User ID already taken.", errcode=Codes.USER_IN_USE
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)
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if token:
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# it's possible for this to get a conflict, but only for a single user
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# since tokens are namespaced based on their user ID
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txn.execute(
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"INSERT INTO access_tokens(id, user_id, token)"
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" VALUES (?,?,?)",
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(next_id, user_id, token,)
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)
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def get_user_by_id(self, user_id):
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return self._simple_select_one(
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table="users",
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keyvalues={
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"name": user_id,
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},
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retcols=["name", "password_hash", "is_guest"],
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allow_none=True,
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desc="get_user_by_id",
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)
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def get_users_by_id_case_insensitive(self, user_id):
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"""Gets users that match user_id case insensitively.
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Returns a mapping of user_id -> password_hash.
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"""
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def f(txn):
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sql = (
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"SELECT name, password_hash FROM users"
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" WHERE lower(name) = lower(?)"
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)
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txn.execute(sql, (user_id,))
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return dict(txn.fetchall())
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return self.runInteraction("get_users_by_id_case_insensitive", f)
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@defer.inlineCallbacks
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def user_set_password_hash(self, user_id, password_hash):
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"""
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NB. This does *not* evict any cache because the one use for this
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removes most of the entries subsequently anyway so it would be
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pointless. Use flush_user separately.
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"""
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yield self._simple_update_one('users', {
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'name': user_id
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}, {
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'password_hash': password_hash
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})
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@defer.inlineCallbacks
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def user_delete_access_tokens(self, user_id):
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yield self.runInteraction(
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"user_delete_access_tokens",
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self._user_delete_access_tokens, user_id
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)
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def _user_delete_access_tokens(self, txn, user_id):
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txn.execute(
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"DELETE FROM access_tokens WHERE user_id = ?",
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(user_id, )
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)
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@defer.inlineCallbacks
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def flush_user(self, user_id):
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rows = yield self._execute(
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'flush_user', None,
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"SELECT token FROM access_tokens WHERE user_id = ?",
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user_id
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)
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for r in rows:
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self.get_user_by_access_token.invalidate((r,))
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@cached()
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def get_user_by_access_token(self, token):
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"""Get a user from the given access token.
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Args:
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token (str): The access token of a user.
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Returns:
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dict: Including the name (user_id) and the ID of their access token.
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Raises:
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StoreError if no user was found.
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"""
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return self.runInteraction(
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"get_user_by_access_token",
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self._query_for_auth,
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token
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)
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def exchange_refresh_token(self, refresh_token, token_generator):
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"""Exchange a refresh token for a new access token and refresh token.
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Doing so invalidates the old refresh token - refresh tokens are single
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use.
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Args:
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token (str): The refresh token of a user.
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token_generator (fn: str -> str): Function which, when given a
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user ID, returns a unique refresh token for that user. This
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function must never return the same value twice.
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Returns:
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tuple of (user_id, refresh_token)
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Raises:
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StoreError if no user was found with that refresh token.
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"""
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return self.runInteraction(
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"exchange_refresh_token",
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self._exchange_refresh_token,
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refresh_token,
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token_generator
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)
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def _exchange_refresh_token(self, txn, old_token, token_generator):
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sql = "SELECT user_id FROM refresh_tokens WHERE token = ?"
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txn.execute(sql, (old_token,))
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rows = self.cursor_to_dict(txn)
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if not rows:
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raise StoreError(403, "Did not recognize refresh token")
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user_id = rows[0]["user_id"]
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# TODO(danielwh): Maybe perform a validation on the macaroon that
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# macaroon.user_id == user_id.
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new_token = token_generator(user_id)
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sql = "UPDATE refresh_tokens SET token = ? WHERE token = ?"
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txn.execute(sql, (new_token, old_token,))
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return user_id, new_token
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@defer.inlineCallbacks
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def is_server_admin(self, user):
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res = yield self._simple_select_one_onecol(
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table="users",
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keyvalues={"name": user.to_string()},
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retcol="admin",
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allow_none=True,
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desc="is_server_admin",
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)
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defer.returnValue(res if res else False)
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@cachedInlineCallbacks()
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def is_guest(self, user_id):
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res = yield self._simple_select_one_onecol(
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table="users",
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keyvalues={"name": user_id},
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retcol="is_guest",
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allow_none=True,
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desc="is_guest",
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)
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defer.returnValue(res if res else False)
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@cachedList(cache=is_guest.cache, list_name="user_ids", num_args=1,
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inlineCallbacks=True)
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def are_guests(self, user_ids):
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sql = "SELECT name, is_guest FROM users WHERE name IN (%s)" % (
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",".join("?" for _ in user_ids),
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)
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rows = yield self._execute(
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"are_guests", self.cursor_to_dict, sql, *user_ids
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)
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result = {user_id: False for user_id in user_ids}
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result.update({
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row["name"]: bool(row["is_guest"])
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for row in rows
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})
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defer.returnValue(result)
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def _query_for_auth(self, txn, token):
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sql = (
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"SELECT users.name, users.is_guest, access_tokens.id as token_id"
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" FROM users"
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" INNER JOIN access_tokens on users.name = access_tokens.user_id"
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" WHERE token = ?"
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)
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txn.execute(sql, (token,))
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rows = self.cursor_to_dict(txn)
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if rows:
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return rows[0]
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return None
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@defer.inlineCallbacks
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def user_add_threepid(self, user_id, medium, address, validated_at, added_at):
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yield self._simple_upsert("user_threepids", {
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"medium": medium,
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"address": address,
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}, {
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"user_id": user_id,
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"validated_at": validated_at,
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"added_at": added_at,
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})
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@defer.inlineCallbacks
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def user_get_threepids(self, user_id):
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ret = yield self._simple_select_list(
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"user_threepids", {
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"user_id": user_id
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},
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['medium', 'address', 'validated_at', 'added_at'],
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'user_get_threepids'
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)
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defer.returnValue(ret)
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@defer.inlineCallbacks
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def get_user_id_by_threepid(self, medium, address):
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ret = yield self._simple_select_one(
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"user_threepids",
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{
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"medium": medium,
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"address": address
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},
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['user_id'], True, 'get_user_id_by_threepid'
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)
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if ret:
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defer.returnValue(ret['user_id'])
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defer.returnValue(None)
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@defer.inlineCallbacks
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def count_all_users(self):
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"""Counts all users registered on the homeserver."""
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def _count_users(txn):
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txn.execute("SELECT COUNT(*) AS users FROM users")
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rows = self.cursor_to_dict(txn)
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if rows:
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return rows[0]["users"]
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return 0
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ret = yield self.runInteraction("count_users", _count_users)
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defer.returnValue(ret)
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@defer.inlineCallbacks
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def find_next_generated_user_id_localpart(self):
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"""
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Gets the localpart of the next generated user ID.
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Generated user IDs are integers, and we aim for them to be as small as
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we can. Unfortunately, it's possible some of them are already taken by
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existing users, and there may be gaps in the already taken range. This
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function returns the start of the first allocatable gap. This is to
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avoid the case of ID 10000000 being pre-allocated, so us wasting the
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first (and shortest) many generated user IDs.
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"""
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def _find_next_generated_user_id(txn):
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txn.execute("SELECT name FROM users")
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rows = self.cursor_to_dict(txn)
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regex = re.compile("^@(\d+):")
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found = set()
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for r in rows:
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user_id = r["name"]
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match = regex.search(user_id)
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if match:
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found.add(int(match.group(1)))
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for i in xrange(len(found) + 1):
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if i not in found:
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return i
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defer.returnValue((yield self.runInteraction(
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"find_next_generated_user_id",
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_find_next_generated_user_id
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)))
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@defer.inlineCallbacks
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def get_3pid_guest_access_token(self, medium, address):
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ret = yield self._simple_select_one(
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"threepid_guest_access_tokens",
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{
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"medium": medium,
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"address": address
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},
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["guest_access_token"], True, 'get_3pid_guest_access_token'
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)
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if ret:
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defer.returnValue(ret["guest_access_token"])
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defer.returnValue(None)
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@defer.inlineCallbacks
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def save_or_get_3pid_guest_access_token(
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self, medium, address, access_token, inviter_user_id
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):
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"""
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Gets the 3pid's guest access token if exists, else saves access_token.
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:param medium (str): Medium of the 3pid. Must be "email".
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:param address (str): 3pid address.
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:param access_token (str): The access token to persist if none is
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already persisted.
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:param inviter_user_id (str): User ID of the inviter.
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:return (deferred str): Whichever access token is persisted at the end
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of this function call.
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"""
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def insert(txn):
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txn.execute(
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"INSERT INTO threepid_guest_access_tokens "
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"(medium, address, guest_access_token, first_inviter) "
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"VALUES (?, ?, ?, ?)",
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(medium, address, access_token, inviter_user_id)
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)
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try:
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yield self.runInteraction("save_3pid_guest_access_token", insert)
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defer.returnValue(access_token)
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except self.database_engine.module.IntegrityError:
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ret = yield self.get_3pid_guest_access_token(medium, address)
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defer.returnValue(ret)
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