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Merge branch 'rav/macaroon_key_fix' into rav/macaroon_key_fix_0.34
This commit is contained in:
Richard van der Hoff
commit
aa70d24125
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@ -300,20 +300,28 @@ class Auth(object):
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Raises:
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AuthError if no user by that token exists or the token is invalid.
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"""
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if rights == "access":
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# first look in the database
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r = yield self._look_up_user_by_access_token(token)
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if r:
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defer.returnValue(r)
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# otherwise it needs to be a valid macaroon
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try:
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user_id, guest = self._parse_and_validate_macaroon(token, rights)
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except _InvalidMacaroonException:
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# doesn't look like a macaroon: treat it as an opaque token which
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# must be in the database.
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# TODO: it would be nice to get rid of this, but apparently some
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# people use access tokens which aren't macaroons
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r = yield self._look_up_user_by_access_token(token)
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defer.returnValue(r)
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try:
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user = UserID.from_string(user_id)
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if guest:
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if rights == "access":
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if not guest:
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# non-guest access tokens must be in the database
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logger.warning("Unrecognised access token - not in store.")
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raise AuthError(
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self.TOKEN_NOT_FOUND_HTTP_STATUS,
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"Unrecognised access token.",
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errcode=Codes.UNKNOWN_TOKEN,
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)
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# Guest access tokens are not stored in the database (there can
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# only be one access token per guest, anyway).
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#
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@ -354,31 +362,15 @@ class Auth(object):
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"device_id": None,
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}
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else:
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# This codepath exists for several reasons:
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# * so that we can actually return a token ID, which is used
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# in some parts of the schema (where we probably ought to
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# use device IDs instead)
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# * the only way we currently have to invalidate an
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# access_token is by removing it from the database, so we
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# have to check here that it is still in the db
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# * some attributes (notably device_id) aren't stored in the
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# macaroon. They probably should be.
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# TODO: build the dictionary from the macaroon once the
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# above are fixed
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ret = yield self._look_up_user_by_access_token(token)
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if ret["user"] != user:
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logger.error(
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"Macaroon user (%s) != DB user (%s)",
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user,
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ret["user"]
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)
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raise AuthError(
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self.TOKEN_NOT_FOUND_HTTP_STATUS,
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"User mismatch in macaroon",
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errcode=Codes.UNKNOWN_TOKEN
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)
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raise RuntimeError("Unknown rights setting %s", rights)
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defer.returnValue(ret)
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except (pymacaroons.exceptions.MacaroonException, TypeError, ValueError):
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except (
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_InvalidMacaroonException,
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pymacaroons.exceptions.MacaroonException,
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TypeError,
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ValueError,
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) as e:
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logger.warning("Invalid macaroon in auth: %s %s", type(e), e)
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raise AuthError(
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self.TOKEN_NOT_FOUND_HTTP_STATUS, "Invalid macaroon passed.",
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errcode=Codes.UNKNOWN_TOKEN
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@ -508,11 +500,8 @@ class Auth(object):
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def _look_up_user_by_access_token(self, token):
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ret = yield self.store.get_user_by_access_token(token)
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if not ret:
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logger.warn("Unrecognised access token - not in store.")
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raise AuthError(
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self.TOKEN_NOT_FOUND_HTTP_STATUS, "Unrecognised access token.",
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errcode=Codes.UNKNOWN_TOKEN
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)
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defer.returnValue(None)
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# we use ret.get() below because *lots* of unit tests stub out
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# get_user_by_access_token in a way where it only returns a couple of
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# the fields.
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@ -57,8 +57,8 @@ class KeyConfig(Config):
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# Unfortunately, there are people out there that don't have this
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# set. Lets just be "nice" and derive one from their secret key.
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logger.warn("Config is missing missing macaroon_secret_key")
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seed = self.signing_key[0].seed
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self.macaroon_secret_key = hashlib.sha256(seed)
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seed = bytes(self.signing_key[0])
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self.macaroon_secret_key = hashlib.sha256(seed).digest()
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self.expire_access_token = config.get("expire_access_token", False)
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@ -71,14 +71,14 @@ class KeyConfig(Config):
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base_key_name = os.path.join(config_dir_path, server_name)
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if is_generating_file:
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macaroon_secret_key = random_string_with_symbols(50)
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macaroon_secret_key = '"%s"' % random_string_with_symbols(50)
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form_secret = '"%s"' % random_string_with_symbols(50)
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else:
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macaroon_secret_key = None
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macaroon_secret_key = 'null'
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form_secret = 'null'
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return """\
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macaroon_secret_key: "%(macaroon_secret_key)s"
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macaroon_secret_key: %(macaroon_secret_key)s
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# Used to enable access token expiration.
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expire_access_token: False
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@ -192,8 +192,6 @@ class AuthTestCase(unittest.TestCase):
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@defer.inlineCallbacks
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def test_get_user_from_macaroon(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org", "device_id": "device"}
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)
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@ -218,6 +216,7 @@ class AuthTestCase(unittest.TestCase):
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@defer.inlineCallbacks
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def test_get_guest_user_from_macaroon(self):
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self.store.get_user_by_id = Mock(return_value={"is_guest": True})
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self.store.get_user_by_access_token = Mock(return_value=None)
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user_id = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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@ -238,158 +237,6 @@ class AuthTestCase(unittest.TestCase):
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self.assertTrue(is_guest)
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self.store.get_user_by_id.assert_called_with(user_id)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_user_db_mismatch(self):
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@percy:matrix.org"}
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)
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user = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key,
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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macaroon.add_first_party_caveat("user_id = %s" % (user,))
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with self.assertRaises(AuthError) as cm:
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yield self.auth.get_user_by_access_token(macaroon.serialize())
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self.assertEqual(401, cm.exception.code)
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self.assertIn("User mismatch", cm.exception.msg)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_missing_caveat(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key,
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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with self.assertRaises(AuthError) as cm:
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yield self.auth.get_user_by_access_token(macaroon.serialize())
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self.assertEqual(401, cm.exception.code)
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self.assertIn("No user caveat", cm.exception.msg)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_wrong_key(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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user = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key + "wrong",
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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macaroon.add_first_party_caveat("user_id = %s" % (user,))
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with self.assertRaises(AuthError) as cm:
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yield self.auth.get_user_by_access_token(macaroon.serialize())
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self.assertEqual(401, cm.exception.code)
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self.assertIn("Invalid macaroon", cm.exception.msg)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_unknown_caveat(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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user = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key,
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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macaroon.add_first_party_caveat("user_id = %s" % (user,))
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macaroon.add_first_party_caveat("cunning > fox")
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with self.assertRaises(AuthError) as cm:
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yield self.auth.get_user_by_access_token(macaroon.serialize())
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self.assertEqual(401, cm.exception.code)
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self.assertIn("Invalid macaroon", cm.exception.msg)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_expired(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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user = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key,
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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macaroon.add_first_party_caveat("user_id = %s" % (user,))
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macaroon.add_first_party_caveat("time < -2000") # ms
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self.hs.clock.now = 5000 # seconds
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self.hs.config.expire_access_token = True
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# yield self.auth.get_user_by_access_token(macaroon.serialize())
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# TODO(daniel): Turn on the check that we validate expiration, when we
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# validate expiration (and remove the above line, which will start
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# throwing).
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with self.assertRaises(AuthError) as cm:
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yield self.auth.get_user_by_access_token(macaroon.serialize())
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self.assertEqual(401, cm.exception.code)
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self.assertIn("Invalid macaroon", cm.exception.msg)
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@defer.inlineCallbacks
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def test_get_user_from_macaroon_with_valid_duration(self):
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# TODO(danielwh): Remove this mock when we remove the
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# get_user_by_access_token fallback.
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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self.store.get_user_by_access_token = Mock(
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return_value={"name": "@baldrick:matrix.org"}
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)
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user_id = "@baldrick:matrix.org"
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macaroon = pymacaroons.Macaroon(
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location=self.hs.config.server_name,
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identifier="key",
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key=self.hs.config.macaroon_secret_key,
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)
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macaroon.add_first_party_caveat("gen = 1")
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macaroon.add_first_party_caveat("type = access")
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macaroon.add_first_party_caveat("user_id = %s" % (user_id,))
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macaroon.add_first_party_caveat("time < 900000000") # ms
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self.hs.clock.now = 5000 # seconds
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self.hs.config.expire_access_token = True
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user_info = yield self.auth.get_user_by_access_token(macaroon.serialize())
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user = user_info["user"]
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self.assertEqual(UserID.from_string(user_id), user)
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@defer.inlineCallbacks
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def test_cannot_use_regular_token_as_guest(self):
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USER_ID = "@percy:matrix.org"
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