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Prevent user tokens being used as guest tokens (#1675)

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Make sure that a user cannot pretend to be a guest by adding 'guest = True'
caveats.
This commit is contained in:
Richard van der Hoff 2016-12-06 15:31:37 +00:00 • committed by GitHub
parent 194b6259c5
commit 1529c19675
3 changed files with 116 additions and 32 deletions
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95
tests/api/test_auth.py
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@ -12,17 +12,22 @@
# 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 tests import unittest
import pymacaroons
from mock import Mock
from twisted.internet import defer
from mock import Mock
import synapse.handlers.auth
from synapse.api.auth import Auth
from synapse.api.errors import AuthError
from synapse.types import UserID
from tests import unittest
from tests.utils import setup_test_homeserver, mock_getRawHeaders
import pymacaroons
class TestHandlers(object):
def __init__(self, hs):
self.auth_handler = synapse.handlers.auth.AuthHandler(hs)
class AuthTestCase(unittest.TestCase):
@ -34,14 +39,17 @@ class AuthTestCase(unittest.TestCase):
self.hs = yield setup_test_homeserver(handlers=None)
self.hs.get_datastore = Mock(return_value=self.store)
self.hs.handlers = TestHandlers(self.hs)
self.auth = Auth(self.hs)
self.test_user = "@foo:bar"
self.test_token = "_test_token_"
# this is overridden for the appservice tests
self.store.get_app_service_by_token = Mock(return_value=None)
@defer.inlineCallbacks
def test_get_user_by_req_user_valid_token(self):
self.store.get_app_service_by_token = Mock(return_value=None)
user_info = {
"name": self.test_user,
"token_id": "ditto",
@ -56,7 +64,6 @@ class AuthTestCase(unittest.TestCase):
self.assertEquals(requester.user.to_string(), self.test_user)
def test_get_user_by_req_user_bad_token(self):
self.store.get_app_service_by_token = Mock(return_value=None)
self.store.get_user_by_access_token = Mock(return_value=None)
request = Mock(args={})
@ -66,7 +73,6 @@ class AuthTestCase(unittest.TestCase):
self.failureResultOf(d, AuthError)
def test_get_user_by_req_user_missing_token(self):
self.store.get_app_service_by_token = Mock(return_value=None)
user_info = {
"name": self.test_user,
"token_id": "ditto",
@ -158,7 +164,7 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("gen = 1")
macaroon.add_first_party_caveat("type = access")
macaroon.add_first_party_caveat("user_id = %s" % (user_id,))
user_info = yield self.auth.get_user_from_macaroon(macaroon.serialize())
user_info = yield self.auth.get_user_by_access_token(macaroon.serialize())
user = user_info["user"]
self.assertEqual(UserID.from_string(user_id), user)
@ -168,6 +174,10 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_get_guest_user_from_macaroon(self):
self.store.get_user_by_id = Mock(return_value={
"is_guest": True,
})
user_id = "@baldrick:matrix.org"
macaroon = pymacaroons.Macaroon(
location=self.hs.config.server_name,
@ -179,11 +189,12 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("guest = true")
serialized = macaroon.serialize()
user_info = yield self.auth.get_user_from_macaroon(serialized)
user_info = yield self.auth.get_user_by_access_token(serialized)
user = user_info["user"]
is_guest = user_info["is_guest"]
self.assertEqual(UserID.from_string(user_id), user)
self.assertTrue(is_guest)
self.store.get_user_by_id.assert_called_with(user_id)
@defer.inlineCallbacks
def test_get_user_from_macaroon_user_db_mismatch(self):
@ -200,7 +211,7 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("type = access")
macaroon.add_first_party_caveat("user_id = %s" % (user,))
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_from_macaroon(macaroon.serialize())
yield self.auth.get_user_by_access_token(macaroon.serialize())
self.assertEqual(401, cm.exception.code)
self.assertIn("User mismatch", cm.exception.msg)
@ -220,7 +231,7 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("type = access")
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_from_macaroon(macaroon.serialize())
yield self.auth.get_user_by_access_token(macaroon.serialize())
self.assertEqual(401, cm.exception.code)
self.assertIn("No user caveat", cm.exception.msg)
@ -242,7 +253,7 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("user_id = %s" % (user,))
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_from_macaroon(macaroon.serialize())
yield self.auth.get_user_by_access_token(macaroon.serialize())
self.assertEqual(401, cm.exception.code)
self.assertIn("Invalid macaroon", cm.exception.msg)
@ -265,7 +276,7 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("cunning > fox")
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_from_macaroon(macaroon.serialize())
yield self.auth.get_user_by_access_token(macaroon.serialize())
self.assertEqual(401, cm.exception.code)
self.assertIn("Invalid macaroon", cm.exception.msg)
@ -293,12 +304,12 @@ class AuthTestCase(unittest.TestCase):
self.hs.clock.now = 5000 # seconds
self.hs.config.expire_access_token = True
# yield self.auth.get_user_from_macaroon(macaroon.serialize())
# yield self.auth.get_user_by_access_token(macaroon.serialize())
# TODO(daniel): Turn on the check that we validate expiration, when we
# validate expiration (and remove the above line, which will start
# throwing).
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_from_macaroon(macaroon.serialize())
yield self.auth.get_user_by_access_token(macaroon.serialize())
self.assertEqual(401, cm.exception.code)
self.assertIn("Invalid macaroon", cm.exception.msg)
@ -327,6 +338,58 @@ class AuthTestCase(unittest.TestCase):
self.hs.clock.now = 5000 # seconds
self.hs.config.expire_access_token = True
user_info = yield self.auth.get_user_from_macaroon(macaroon.serialize())
user_info = yield self.auth.get_user_by_access_token(macaroon.serialize())
user = user_info["user"]
self.assertEqual(UserID.from_string(user_id), user)
@defer.inlineCallbacks
def test_cannot_use_regular_token_as_guest(self):
USER_ID = "@percy:matrix.org"
self.store.add_access_token_to_user = Mock()
token = yield self.hs.handlers.auth_handler.issue_access_token(
USER_ID, "DEVICE"
)
self.store.add_access_token_to_user.assert_called_with(
USER_ID, token, "DEVICE"
)
def get_user(tok):
if token != tok:
return None
return {
"name": USER_ID,
"is_guest": False,
"token_id": 1234,
"device_id": "DEVICE",
}
self.store.get_user_by_access_token = get_user
self.store.get_user_by_id = Mock(return_value={
"is_guest": False,
})
# check the token works
request = Mock(args={})
request.args["access_token"] = [token]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = yield self.auth.get_user_by_req(request, allow_guest=True)
self.assertEqual(UserID.from_string(USER_ID), requester.user)
self.assertFalse(requester.is_guest)
# add an is_guest caveat
mac = pymacaroons.Macaroon.deserialize(token)
mac.add_first_party_caveat("guest = true")
guest_tok = mac.serialize()
# the token should *not* work now
request = Mock(args={})
request.args["access_token"] = [guest_tok]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
with self.assertRaises(AuthError) as cm:
yield self.auth.get_user_by_req(request, allow_guest=True)
self.assertEqual(401, cm.exception.code)
self.assertEqual("Guest access token used for regular user", cm.exception.msg)
self.store.get_user_by_id.assert_called_with(USER_ID)