/tokenrefresh POST endpoint

This allows refresh tokens to be exchanged for (access_token,
refresh_token).

It also starts issuing them on login, though no clients currently
interpret them.
This commit is contained in:
Daniel Wagner-Hall 2015-08-20 16:21:35 +01:00
parent 13a6517d89
commit cecbd636e9
9 changed files with 232 additions and 8 deletions

View File

@ -279,15 +279,18 @@ class AuthHandler(BaseHandler):
user_id (str): User ID
password (str): Password
Returns:
The access token for the user's session.
A tuple of:
The access token for the user's session.
The refresh token for the user's session.
Raises:
StoreError if there was a problem storing the token.
LoginError if there was an authentication problem.
"""
yield self._check_password(user_id, password)
logger.info("Logging in user %s", user_id)
token = yield self.issue_access_token(user_id)
defer.returnValue(token)
access_token = yield self.issue_access_token(user_id)
refresh_token = yield self.issue_refresh_token(user_id)
defer.returnValue((access_token, refresh_token))
@defer.inlineCallbacks
def _check_password(self, user_id, password):
@ -304,11 +307,16 @@ class AuthHandler(BaseHandler):
@defer.inlineCallbacks
def issue_access_token(self, user_id):
reg_handler = self.hs.get_handlers().registration_handler
access_token = reg_handler.generate_access_token(user_id)
access_token = self.generate_access_token(user_id)
yield self.store.add_access_token_to_user(user_id, access_token)
defer.returnValue(access_token)
@defer.inlineCallbacks
def issue_refresh_token(self, user_id):
refresh_token = self.generate_refresh_token(user_id)
yield self.store.add_refresh_token_to_user(user_id, refresh_token)
defer.returnValue(refresh_token)
def generate_access_token(self, user_id):
macaroon = pymacaroons.Macaroon(
location = self.hs.config.server_name,
@ -323,6 +331,23 @@ class AuthHandler(BaseHandler):
return macaroon.serialize()
def generate_refresh_token(self, user_id):
m = self._generate_base_macaroon(user_id)
m.add_first_party_caveat("type = refresh")
# Important to add a nonce, because otherwise every refresh token for a
# user will be the same.
m.add_first_party_caveat("nonce = %s" % stringutils.random_string_with_symbols(16))
return m.serialize()
def _generate_base_macaroon(self, user_id):
macaroon = pymacaroons.Macaroon(
location = self.hs.config.server_name,
identifier = "key",
key = self.hs.config.macaroon_secret_key)
macaroon.add_first_party_caveat("gen = 1")
macaroon.add_first_party_caveat("user_id = %s" % (user_id,))
return macaroon
@defer.inlineCallbacks
def set_password(self, user_id, newpassword):
password_hash = bcrypt.hashpw(newpassword, bcrypt.gensalt())

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@ -78,13 +78,15 @@ class LoginRestServlet(ClientV1RestServlet):
login_submission["user"] = UserID.create(
login_submission["user"], self.hs.hostname).to_string()
token = yield self.handlers.auth_handler.login_with_password(
auth_handler = self.handlers.auth_handler
access_token, refresh_token = yield auth_handler.login_with_password(
user_id=login_submission["user"],
password=login_submission["password"])
result = {
"user_id": login_submission["user"], # may have changed
"access_token": token,
"access_token": access_token,
"refresh_token": refresh_token,
"home_server": self.hs.hostname,
}

View File

@ -21,6 +21,7 @@ from . import (
auth,
receipts,
keys,
tokenrefresh,
)
from synapse.http.server import JsonResource
@ -42,3 +43,4 @@ class ClientV2AlphaRestResource(JsonResource):
auth.register_servlets(hs, client_resource)
receipts.register_servlets(hs, client_resource)
keys.register_servlets(hs, client_resource)
tokenrefresh.register_servlets(hs, client_resource)

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@ -0,0 +1,56 @@
# -*- coding: utf-8 -*-
# Copyright 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.
from twisted.internet import defer
from synapse.api.errors import AuthError, StoreError, SynapseError
from synapse.http.servlet import RestServlet
from ._base import client_v2_pattern, parse_json_dict_from_request
class TokenRefreshRestServlet(RestServlet):
"""
Exchanges refresh tokens for a pair of an access token and a new refresh
token.
"""
PATTERN = client_v2_pattern("/tokenrefresh")
def __init__(self, hs):
super(TokenRefreshRestServlet, self).__init__()
self.hs = hs
self.store = hs.get_datastore()
@defer.inlineCallbacks
def on_POST(self, request):
body = parse_json_dict_from_request(request)
try:
old_refresh_token = body["refresh_token"]
auth_handler = self.hs.get_handlers().auth_handler
(user_id, new_refresh_token) = yield self.store.exchange_refresh_token(
old_refresh_token, auth_handler.generate_refresh_token)
new_access_token = yield auth_handler.issue_access_token(user_id)
defer.returnValue((200, {
"access_token": new_access_token,
"refresh_token": new_refresh_token,
}))
except KeyError:
raise SynapseError(400, "Missing required key 'refresh_token'.")
except StoreError:
raise AuthError(403, "Did not recognize refresh token")
def register_servlets(hs, http_server):
TokenRefreshRestServlet(hs).register(http_server)

View File

@ -54,7 +54,7 @@ logger = logging.getLogger(__name__)
# Remember to update this number every time a change is made to database
# schema files, so the users will be informed on server restarts.
SCHEMA_VERSION = 22
SCHEMA_VERSION = 23
dir_path = os.path.abspath(os.path.dirname(__file__))

View File

@ -181,6 +181,7 @@ class SQLBaseStore(object):
self._transaction_id_gen = IdGenerator("sent_transactions", "id", self)
self._state_groups_id_gen = IdGenerator("state_groups", "id", self)
self._access_tokens_id_gen = IdGenerator("access_tokens", "id", self)
self._refresh_tokens_id_gen = IdGenerator("refresh_tokens", "id", self)
self._pushers_id_gen = IdGenerator("pushers", "id", self)
self._push_rule_id_gen = IdGenerator("push_rules", "id", self)
self._push_rules_enable_id_gen = IdGenerator("push_rules_enable", "id", self)

View File

@ -50,6 +50,28 @@ class RegistrationStore(SQLBaseStore):
desc="add_access_token_to_user",
)
@defer.inlineCallbacks
def add_refresh_token_to_user(self, user_id, token):
"""Adds a refresh token for the given user.
Args:
user_id (str): The user ID.
token (str): The new refresh token to add.
Raises:
StoreError if there was a problem adding this.
"""
next_id = yield self._refresh_tokens_id_gen.get_next()
yield self._simple_insert(
"refresh_tokens",
{
"id": next_id,
"user_id": user_id,
"token": token
},
desc="add_refresh_token_to_user",
)
@defer.inlineCallbacks
def register(self, user_id, token, password_hash):
"""Attempts to register an account.
@ -152,6 +174,46 @@ class RegistrationStore(SQLBaseStore):
token
)
def exchange_refresh_token(self, refresh_token, token_generator):
"""Exchange a refresh token for a new access token and refresh token.
Doing so invalidates the old refresh token - refresh tokens are single
use.
Args:
token (str): The refresh token of a user.
token_generator (fn: str -> str): Function which, when given a
user ID, returns a unique refresh token for that user. This
function must never return the same value twice.
Returns:
tuple of (user_id, refresh_token)
Raises:
StoreError if no user was found with that refresh token.
"""
return self.runInteraction(
"exchange_refresh_token",
self._exchange_refresh_token,
refresh_token,
token_generator
)
def _exchange_refresh_token(self, txn, old_token, token_generator):
sql = "SELECT user_id FROM refresh_tokens WHERE token = ?"
txn.execute(sql, (old_token,))
rows = self.cursor_to_dict(txn)
if not rows:
raise StoreError(403, "Did not recognize refresh token")
user_id = rows[0]["user_id"]
# TODO(danielwh): Maybe perform a validation on the macaroon that
# macaroon.user_id == user_id.
new_token = token_generator(user_id)
sql = "UPDATE refresh_tokens SET token = ? WHERE token = ?"
txn.execute(sql, (new_token, old_token,))
return user_id, new_token
@defer.inlineCallbacks
def is_server_admin(self, user):
res = yield self._simple_select_one_onecol(

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@ -0,0 +1,21 @@
/* Copyright 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.
*/
CREATE TABLE IF NOT EXISTS refresh_tokens(
id INTEGER PRIMARY KEY AUTOINCREMENT,
token TEXT NOT NULL,
user_id TEXT NOT NULL,
UNIQUE (token)
);

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@ -17,7 +17,9 @@
from tests import unittest
from twisted.internet import defer
from synapse.api.errors import StoreError
from synapse.storage.registration import RegistrationStore
from synapse.util import stringutils
from tests.utils import setup_test_homeserver
@ -27,6 +29,7 @@ class RegistrationStoreTestCase(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
hs = yield setup_test_homeserver()
self.db_pool = hs.get_db_pool()
self.store = RegistrationStore(hs)
@ -77,3 +80,55 @@ class RegistrationStoreTestCase(unittest.TestCase):
self.assertTrue("token_id" in result)
@defer.inlineCallbacks
def test_exchange_refresh_token_valid(self):
uid = stringutils.random_string(32)
generator = TokenGenerator()
last_token = generator.generate(uid)
self.db_pool.runQuery(
"INSERT INTO refresh_tokens(user_id, token) VALUES(?,?)",
(uid, last_token,))
(found_user_id, refresh_token) = yield self.store.exchange_refresh_token(
last_token, generator.generate)
self.assertEqual(uid, found_user_id)
rows = yield self.db_pool.runQuery(
"SELECT token FROM refresh_tokens WHERE user_id = ?", (uid, ))
self.assertEqual([(refresh_token,)], rows)
# We issued token 1, then exchanged it for token 2
expected_refresh_token = u"%s-%d" % (uid, 2,)
self.assertEqual(expected_refresh_token, refresh_token)
@defer.inlineCallbacks
def test_exchange_refresh_token_none(self):
uid = stringutils.random_string(32)
generator = TokenGenerator()
last_token = generator.generate(uid)
with self.assertRaises(StoreError):
yield self.store.exchange_refresh_token(last_token, generator.generate)
@defer.inlineCallbacks
def test_exchange_refresh_token_invalid(self):
uid = stringutils.random_string(32)
generator = TokenGenerator()
last_token = generator.generate(uid)
wrong_token = "%s-wrong" % (last_token,)
self.db_pool.runQuery(
"INSERT INTO refresh_tokens(user_id, token) VALUES(?,?)",
(uid, wrong_token,))
with self.assertRaises(StoreError):
yield self.store.exchange_refresh_token(last_token, generator.generate)
class TokenGenerator:
def __init__(self):
self._last_issued_token = 0
def generate(self, user_id):
self._last_issued_token += 1
return u"%s-%d" % (user_id, self._last_issued_token,)