From ed4bc3d2fc7242e27b3cdd36bc6c27c98fac09c8 Mon Sep 17 00:00:00 2001
From: Neil Johnson <neil@matrix.org>
Date: Tue, 14 Aug 2018 15:04:48 +0100
Subject: [PATCH] fix off by 1s on mau

---
 synapse/handlers/auth.py        |  4 ++--
 tests/handlers/test_auth.py     | 39 ++++++++++++++++++++++++++++++++-
 tests/handlers/test_register.py | 14 ++++++++----
 3 files changed, 50 insertions(+), 7 deletions(-)

diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 7ea8ce9f9..7baaa3944 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -520,7 +520,7 @@ class AuthHandler(BaseHandler):
         """
         logger.info("Logging in user %s on device %s", user_id, device_id)
         access_token = yield self.issue_access_token(user_id, device_id)
-        yield self.auth.check_auth_blocking()
+        yield self.auth.check_auth_blocking(user_id)
 
         # the device *should* have been registered before we got here; however,
         # it's possible we raced against a DELETE operation. The thing we
@@ -734,7 +734,6 @@ class AuthHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def validate_short_term_login_token_and_get_user_id(self, login_token):
-        yield self.auth.check_auth_blocking()
         auth_api = self.hs.get_auth()
         user_id = None
         try:
@@ -743,6 +742,7 @@ class AuthHandler(BaseHandler):
             auth_api.validate_macaroon(macaroon, "login", True, user_id)
         except Exception:
             raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN)
+        yield self.auth.check_auth_blocking(user_id)
         defer.returnValue(user_id)
 
     @defer.inlineCallbacks
diff --git a/tests/handlers/test_auth.py b/tests/handlers/test_auth.py
index 56c0f87fb..9ca7b2ee4 100644
--- a/tests/handlers/test_auth.py
+++ b/tests/handlers/test_auth.py
@@ -124,7 +124,7 @@ class AuthTestCase(unittest.TestCase):
         )
 
     @defer.inlineCallbacks
-    def test_mau_limits_exceeded(self):
+    def test_mau_limits_exceeded_large(self):
         self.hs.config.limit_usage_by_mau = True
         self.hs.get_datastore().get_monthly_active_count = Mock(
             return_value=defer.succeed(self.large_number_of_users)
@@ -141,6 +141,43 @@ class AuthTestCase(unittest.TestCase):
                 self._get_macaroon().serialize()
             )
 
+    @defer.inlineCallbacks
+    def test_mau_limits_parity(self):
+        self.hs.config.limit_usage_by_mau = True
+
+        # If not in monthly active cohort
+        self.hs.get_datastore().get_monthly_active_count = Mock(
+            return_value=defer.succeed(self.hs.config.max_mau_value)
+        )
+        with self.assertRaises(AuthError):
+            yield self.auth_handler.get_access_token_for_user_id('user_a')
+
+        self.hs.get_datastore().get_monthly_active_count = Mock(
+            return_value=defer.succeed(self.hs.config.max_mau_value)
+        )
+        with self.assertRaises(AuthError):
+            yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
+                self._get_macaroon().serialize()
+            )
+        # If in monthly active cohort
+        self.hs.get_datastore().user_last_seen_monthly_active = Mock(
+            return_value=defer.succeed(self.hs.get_clock().time_msec())
+        )
+        self.hs.get_datastore().get_monthly_active_count = Mock(
+            return_value=defer.succeed(self.hs.config.max_mau_value)
+        )
+        yield self.auth_handler.get_access_token_for_user_id('user_a')
+        self.hs.get_datastore().user_last_seen_monthly_active = Mock(
+            return_value=defer.succeed(self.hs.get_clock().time_msec())
+        )
+        self.hs.get_datastore().get_monthly_active_count = Mock(
+            return_value=defer.succeed(self.hs.config.max_mau_value)
+        )
+        yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
+            self._get_macaroon().serialize()
+        )
+
+
     @defer.inlineCallbacks
     def test_mau_limits_not_exceeded(self):
         self.hs.config.limit_usage_by_mau = True
diff --git a/tests/handlers/test_register.py b/tests/handlers/test_register.py
index 35d1bcab3..a821da075 100644
--- a/tests/handlers/test_register.py
+++ b/tests/handlers/test_register.py
@@ -17,7 +17,7 @@ from mock import Mock
 
 from twisted.internet import defer
 
-from synapse.api.errors import AuthError
+from synapse.api.errors import RegistrationError
 from synapse.handlers.register import RegistrationHandler
 from synapse.types import UserID, create_requester
 
@@ -109,7 +109,7 @@ class RegistrationTestCase(unittest.TestCase):
         self.store.get_monthly_active_count = Mock(
             return_value=defer.succeed(self.lots_of_users)
         )
-        with self.assertRaises(AuthError):
+        with self.assertRaises(RegistrationError):
             yield self.handler.get_or_create_user("requester", 'b', "display_name")
 
     @defer.inlineCallbacks
@@ -118,7 +118,13 @@ class RegistrationTestCase(unittest.TestCase):
         self.store.get_monthly_active_count = Mock(
             return_value=defer.succeed(self.lots_of_users)
         )
-        with self.assertRaises(AuthError):
+        with self.assertRaises(RegistrationError):
+            yield self.handler.register(localpart="local_part")
+
+        self.store.get_monthly_active_count = Mock(
+            return_value=defer.succeed(self.hs.config.max_mau_value)
+        )
+        with self.assertRaises(RegistrationError):
             yield self.handler.register(localpart="local_part")
 
     @defer.inlineCallbacks
@@ -127,5 +133,5 @@ class RegistrationTestCase(unittest.TestCase):
         self.store.get_monthly_active_count = Mock(
             return_value=defer.succeed(self.lots_of_users)
         )
-        with self.assertRaises(AuthError):
+        with self.assertRaises(RegistrationError):
             yield self.handler.register_saml2(localpart="local_part")