summary refs log tree commit diff
path: root/synapse/handlers/register.py
blob: 8a365c20f9449b1fa6844a9fe973b95dbd4bc75e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
# -*- coding: utf-8 -*-
# Copyright 2014, 2015 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 (
    AuthError, Codes, SynapseError, RegistrationError, InvalidCaptchaError
)
from ._base import BaseHandler
import synapse.util.stringutils as stringutils
from synapse.util.async import run_on_reactor
from synapse.http.client import CaptchaServerHttpClient

import logging
import urllib

logger = logging.getLogger(__name__)


def registered_user(distributor, user):
    return distributor.fire("registered_user", user)


class RegistrationHandler(BaseHandler):

    def __init__(self, hs):
        super(RegistrationHandler, self).__init__(hs)

        self.distributor = hs.get_distributor()
        self.distributor.declare("registered_user")
        self.captch_client = CaptchaServerHttpClient(hs)

    @defer.inlineCallbacks
    def check_username(self, localpart):
        yield run_on_reactor()

        if urllib.quote(localpart) != localpart:
            raise SynapseError(
                400,
                "User ID must only contain characters which do not"
                " require URL encoding."
            )

        user = UserID(localpart, self.hs.hostname)
        user_id = user.to_string()

        yield self.check_user_id_is_valid(user_id)

        users = yield self.store.get_users_by_id_case_insensitive(user_id)
        if users:
            raise SynapseError(
                400,
                "User ID already taken.",
                errcode=Codes.USER_IN_USE,
            )

    @defer.inlineCallbacks
    def register(self, localpart=None, password=None, generate_token=True):
        """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. This can be None which means they cannot login again
            via a password (e.g. the user is an application service user).
        Returns:
            A tuple of (user_id, access_token).
        Raises:
            RegistrationError if there was a problem registering.
        """
        yield run_on_reactor()
        password_hash = None
        if password:
            password_hash = self.auth_handler().hash(password)

        if localpart:
            yield self.check_username(localpart)

            user = UserID(localpart, self.hs.hostname)
            user_id = user.to_string()

            token = None
            if generate_token:
                token = self.auth_handler().generate_access_token(user_id)
            yield self.store.register(
                user_id=user_id,
                token=token,
                password_hash=password_hash
            )

            yield registered_user(self.distributor, user)
        else:
            # autogen a random user ID
            attempts = 0
            user_id = None
            token = None
            while not user_id:
                try:
                    localpart = self._generate_user_id()
                    user = UserID(localpart, self.hs.hostname)
                    user_id = user.to_string()
                    yield self.check_user_id_is_valid(user_id)
                    if generate_token:
                        token = self.auth_handler().generate_access_token(user_id)
                    yield self.store.register(
                        user_id=user_id,
                        token=token,
                        password_hash=password_hash)

                    yield registered_user(self.distributor, user)
                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.")

            # We used to generate default identicons here, but nowadays
            # we want clients to generate their own as part of their branding
            # rather than there being consistent matrix-wide ones, so we don't.

        defer.returnValue((user_id, token))

    @defer.inlineCallbacks
    def appservice_register(self, user_localpart, as_token):
        user = UserID(user_localpart, self.hs.hostname)
        user_id = user.to_string()
        service = yield self.store.get_app_service_by_token(as_token)
        if not service:
            raise AuthError(403, "Invalid application service token.")
        if not service.is_interested_in_user(user_id):
            raise SynapseError(
                400, "Invalid user localpart for this application service.",
                errcode=Codes.EXCLUSIVE
            )
        token = self.auth_handler().generate_access_token(user_id)
        yield self.store.register(
            user_id=user_id,
            token=token,
            password_hash=""
        )
        registered_user(self.distributor, user)
        defer.returnValue((user_id, token))

    @defer.inlineCallbacks
    def check_recaptcha(self, ip, private_key, challenge, response):
        """
        Checks a recaptcha is correct.

        Used only by c/s api v1
        """

        captcha_response = yield self._validate_captcha(
            ip,
            private_key,
            challenge,
            response
        )
        if not captcha_response["valid"]:
            logger.info("Invalid captcha entered from %s. Error: %s",
                        ip, captcha_response["error_url"])
            raise InvalidCaptchaError(
                error_url=captcha_response["error_url"]
            )
        else:
            logger.info("Valid captcha entered from %s", ip)

    @defer.inlineCallbacks
    def register_saml2(self, localpart):
        """
        Registers email_id as SAML2 Based Auth.
        """
        if urllib.quote(localpart) != localpart:
            raise SynapseError(
                400,
                "User ID must only contain characters which do not"
                " require URL encoding."
                )
        user = UserID(localpart, self.hs.hostname)
        user_id = user.to_string()

        yield self.check_user_id_is_valid(user_id)
        token = self.auth_handler().generate_access_token(user_id)
        try:
            yield self.store.register(
                user_id=user_id,
                token=token,
                password_hash=None
            )
            yield registered_user(self.distributor, user)
        except Exception, e:
            yield self.store.add_access_token_to_user(user_id, token)
            # Ignore Registration errors
            logger.exception(e)
        defer.returnValue((user_id, token))

    @defer.inlineCallbacks
    def register_email(self, threepidCreds):
        """
        Registers emails with an identity server.

        Used only by c/s api v1
        """

        for c in threepidCreds:
            logger.info("validating theeepidcred sid %s on id server %s",
                        c['sid'], c['idServer'])
            try:
                identity_handler = self.hs.get_handlers().identity_handler
                threepid = yield identity_handler.threepid_from_creds(c)
            except:
                logger.exception("Couldn't validate 3pid")
                raise RegistrationError(400, "Couldn't validate 3pid")

            if not threepid:
                raise RegistrationError(400, "Couldn't validate 3pid")
            logger.info("got threepid with medium '%s' and address '%s'",
                        threepid['medium'], threepid['address'])

    @defer.inlineCallbacks
    def bind_emails(self, user_id, threepidCreds):
        """Links emails with a user ID and informs an identity server.

        Used only by c/s api v1
        """

        # Now we have a matrix ID, bind it to the threepids we were given
        for c in threepidCreds:
            identity_handler = self.hs.get_handlers().identity_handler
            # XXX: This should be a deferred list, shouldn't it?
            yield identity_handler.bind_threepid(c, user_id)

    @defer.inlineCallbacks
    def check_user_id_is_valid(self, user_id):
        # valid user IDs must not clash with any user ID namespaces claimed by
        # application services.
        services = yield self.store.get_app_services()
        interested_services = [
            s for s in services if s.is_interested_in_user(user_id)
        ]
        for service in interested_services:
            if service.is_exclusive_user(user_id):
                raise SynapseError(
                    400, "This user ID is reserved by an application service.",
                    errcode=Codes.EXCLUSIVE
                )

    def _generate_user_id(self):
        return "-" + stringutils.random_string(18)

    @defer.inlineCallbacks
    def _validate_captcha(self, ip_addr, private_key, challenge, response):
        """Validates the captcha provided.

        Used only by c/s api v1

        Returns:
            dict: Containing 'valid'(bool) and 'error_url'(str) if invalid.

        """
        response = yield self._submit_captcha(ip_addr, private_key, challenge,
                                              response)
        # parse Google's response. Lovely format..
        lines = response.split('\n')
        json = {
            "valid": lines[0] == 'true',
            "error_url": "http://www.google.com/recaptcha/api/challenge?" +
                         "error=%s" % lines[1]
        }
        defer.returnValue(json)

    @defer.inlineCallbacks
    def _submit_captcha(self, ip_addr, private_key, challenge, response):
        """
        Used only by c/s api v1
        """
        data = yield self.captcha_client.post_urlencoded_get_raw(
            "http://www.google.com:80/recaptcha/api/verify",
            args={
                'privatekey': private_key,
                'remoteip': ip_addr,
                'challenge': challenge,
                'response': response
            }
        )
        defer.returnValue(data)

    def auth_handler(self):
        return self.hs.get_handlers().auth_handler