mirror of
https://mau.dev/maunium/synapse.git
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231 lines
8.1 KiB
Python
231 lines
8.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 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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"""Contains functions for registering clients."""
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from twisted.internet import defer
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from twisted.python import log
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from synapse.types import UserID
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from synapse.api.errors import (
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SynapseError, RegistrationError, InvalidCaptchaError
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)
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from ._base import BaseHandler
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import synapse.util.stringutils as stringutils
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from synapse.http.client import IdentityServerHttpClient
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from synapse.http.client import CaptchaServerHttpClient
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import base64
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import bcrypt
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import logging
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logger = logging.getLogger(__name__)
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class RegistrationHandler(BaseHandler):
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def __init__(self, hs):
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super(RegistrationHandler, self).__init__(hs)
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self.distributor = hs.get_distributor()
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self.distributor.declare("registered_user")
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@defer.inlineCallbacks
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def register(self, localpart=None, password=None):
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"""Registers a new client on the server.
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Args:
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localpart : The local part of the user ID to register. If None,
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one will be randomly generated.
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password (str) : The password to assign to this user so they can
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login again.
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Returns:
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A tuple of (user_id, access_token).
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Raises:
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RegistrationError if there was a problem registering.
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"""
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password_hash = None
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if password:
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password_hash = bcrypt.hashpw(password, bcrypt.gensalt())
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if localpart:
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user = UserID(localpart, self.hs.hostname, True)
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user_id = user.to_string()
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token = self._generate_token(user_id)
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yield self.store.register(
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user_id=user_id,
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token=token,
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password_hash=password_hash
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)
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self.distributor.fire("registered_user", user)
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else:
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# autogen a random user ID
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attempts = 0
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user_id = None
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token = None
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while not user_id and not token:
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try:
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localpart = self._generate_user_id()
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user = UserID(localpart, self.hs.hostname, True)
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user_id = user.to_string()
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token = self._generate_token(user_id)
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yield self.store.register(
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user_id=user_id,
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token=token,
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password_hash=password_hash)
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self.distributor.fire("registered_user", user)
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except SynapseError:
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# if user id is taken, just generate another
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user_id = None
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token = None
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attempts += 1
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if attempts > 5:
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raise RegistrationError(
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500, "Cannot generate user ID.")
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defer.returnValue((user_id, token))
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@defer.inlineCallbacks
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def check_recaptcha(self, ip, private_key, challenge, response):
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"""Checks a recaptcha is correct."""
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captcha_response = yield self._validate_captcha(
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ip,
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private_key,
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challenge,
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response
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)
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if not captcha_response["valid"]:
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logger.info("Invalid captcha entered from %s. Error: %s",
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ip, captcha_response["error_url"])
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raise InvalidCaptchaError(
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error_url=captcha_response["error_url"]
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)
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else:
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logger.info("Valid captcha entered from %s", ip)
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@defer.inlineCallbacks
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def register_email(self, threepidCreds):
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"""Registers emails with an identity server."""
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for c in threepidCreds:
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logger.info("validating theeepidcred sid %s on id server %s",
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c['sid'], c['idServer'])
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try:
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threepid = yield self._threepid_from_creds(c)
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except:
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log.err()
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raise RegistrationError(400, "Couldn't validate 3pid")
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if not threepid:
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raise RegistrationError(400, "Couldn't validate 3pid")
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logger.info("got threepid medium %s address %s",
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threepid['medium'], threepid['address'])
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@defer.inlineCallbacks
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def bind_emails(self, user_id, threepidCreds):
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"""Links emails with a user ID and informs an identity server."""
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# Now we have a matrix ID, bind it to the threepids we were given
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for c in threepidCreds:
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# XXX: This should be a deferred list, shouldn't it?
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yield self._bind_threepid(c, user_id)
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def _generate_token(self, user_id):
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# urlsafe variant uses _ and - so use . as the separator and replace
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# all =s with .s so http clients don't quote =s when it is used as
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# query params.
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return (base64.urlsafe_b64encode(user_id).replace('=', '.') + '.' +
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stringutils.random_string(18))
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def _generate_user_id(self):
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return "-" + stringutils.random_string(18)
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@defer.inlineCallbacks
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def _threepid_from_creds(self, creds):
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# TODO: get this from the homeserver rather than creating a new one for
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# each request
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httpCli = IdentityServerHttpClient(self.hs)
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# XXX: make this configurable!
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trustedIdServers = ['matrix.org:8090']
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if not creds['idServer'] in trustedIdServers:
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logger.warn('%s is not a trusted ID server: rejecting 3pid ' +
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'credentials', creds['idServer'])
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defer.returnValue(None)
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data = yield httpCli.get_json(
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creds['idServer'],
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"/_matrix/identity/api/v1/3pid/getValidated3pid",
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{'sid': creds['sid'], 'clientSecret': creds['clientSecret']}
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)
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if 'medium' in data:
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defer.returnValue(data)
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defer.returnValue(None)
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@defer.inlineCallbacks
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def _bind_threepid(self, creds, mxid):
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httpCli = IdentityServerHttpClient(self.hs)
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data = yield httpCli.post_urlencoded_get_json(
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creds['idServer'],
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"/_matrix/identity/api/v1/3pid/bind",
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{
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'sid': creds['sid'],
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'clientSecret': creds['clientSecret'],
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'mxid': mxid,
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}
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)
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defer.returnValue(data)
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@defer.inlineCallbacks
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def _validate_captcha(self, ip_addr, private_key, challenge, response):
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"""Validates the captcha provided.
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Returns:
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dict: Containing 'valid'(bool) and 'error_url'(str) if invalid.
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"""
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response = yield self._submit_captcha(ip_addr, private_key, challenge,
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response)
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# parse Google's response. Lovely format..
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lines = response.split('\n')
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json = {
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"valid": lines[0] == 'true',
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"error_url": "http://www.google.com/recaptcha/api/challenge?" +
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"error=%s" % lines[1]
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}
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defer.returnValue(json)
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@defer.inlineCallbacks
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def _submit_captcha(self, ip_addr, private_key, challenge, response):
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# TODO: get this from the homeserver rather than creating a new one for
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# each request
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client = CaptchaServerHttpClient(self.hs)
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data = yield client.post_urlencoded_get_raw(
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"www.google.com:80",
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"/recaptcha/api/verify",
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# twisted dislikes google's response, no content length.
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accept_partial=True,
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args={
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'privatekey': private_key,
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'remoteip': ip_addr,
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'challenge': challenge,
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'response': response
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}
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)
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defer.returnValue(data)
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