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# -*- coding: utf-8 -*-
# Copyright 2014 OpenMarket Ltd
#
# 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.
"""Contains functions for registering clients."""
from twisted.internet import defer
from synapse.types import UserID
from synapse.api.errors import SynapseError, RegistrationError
from ._base import BaseHandler
import synapse.util.stringutils as stringutils
import base64
import bcrypt
class RegistrationHandler(BaseHandler):
def __init__(self, hs):
super(RegistrationHandler, self).__init__(hs)
self.distributor = hs.get_distributor()
self.distributor.declare("registered_user")
@defer.inlineCallbacks
def register(self, localpart=None, password=None):
"""Registers a new client on the server.
Args:
localpart : The local part of the user ID to register. If None,
one will be randomly generated.
password (str) : The password to assign to this user so they can
login again.
Returns:
A tuple of (user_id, access_token).
Raises:
RegistrationError if there was a problem registering.
"""
password_hash = None
if password:
password_hash = bcrypt.hashpw(password, bcrypt.gensalt())
if localpart:
user = UserID(localpart, self.hs.hostname, True)
user_id = user.to_string()
token = self._generate_token(user_id)
yield self.store.register(user_id=user_id,
token=token,
password_hash=password_hash)
self.distributor.fire("registered_user", user)
defer.returnValue((user_id, token))
else:
# autogen a random user ID
attempts = 0
user_id = None
token = None
while not user_id and not token:
try:
localpart = self._generate_user_id()
user = UserID(localpart, self.hs.hostname, True)
user_id = user.to_string()
token = self._generate_token(user_id)
yield self.store.register(
user_id=user_id,
token=token,
password_hash=password_hash)
self.distributor.fire("registered_user", user)
defer.returnValue((user_id, token))
except SynapseError:
# if user id is taken, just generate another
user_id = None
token = None
attempts += 1
if attempts > 5:
raise RegistrationError(
500, "Cannot generate user ID.")
def _generate_token(self, user_id):
# urlsafe variant uses _ and - so use . as the separator and replace
# all =s with .s so http clients don't quote =s when it is used as
# query params.
return (base64.urlsafe_b64encode(user_id).replace('=', '.') + '.' +
stringutils.random_string(18))
def _generate_user_id(self):
return "-" + stringutils.random_string(18)
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