from __future__ import unicode_literals from datetime import date from django.contrib.auth import ( BACKEND_SESSION_KEY, SESSION_KEY, authenticate, get_user, ) from django.contrib.auth.backends import ModelBackend from django.contrib.auth.hashers import MD5PasswordHasher from django.contrib.auth.models import AnonymousUser, Group, Permission, User from django.contrib.contenttypes.models import ContentType from django.core.exceptions import ImproperlyConfigured, PermissionDenied from django.http import HttpRequest from django.test import ( SimpleTestCase, TestCase, modify_settings, override_settings, ) from .models import CustomPermissionsUser, CustomUser, ExtensionUser, UUIDUser class CountingMD5PasswordHasher(MD5PasswordHasher): """Hasher that counts how many times it computes a hash.""" calls = 0 def encode(self, *args, **kwargs): type(self).calls += 1 return super(CountingMD5PasswordHasher, self).encode(*args, **kwargs) class BaseModelBackendTest(object): """ A base class for tests that need to validate the ModelBackend with different User models. Subclasses should define a class level UserModel attribute, and a create_users() method to construct two users for test purposes. """ backend = 'django.contrib.auth.backends.ModelBackend' def setUp(self): self.patched_settings = modify_settings( AUTHENTICATION_BACKENDS={'append': self.backend}, ) self.patched_settings.enable() self.create_users() def tearDown(self): self.patched_settings.disable() # The custom_perms test messes with ContentTypes, which will # be cached; flush the cache to ensure there are no side effects # Refs #14975, #14925 ContentType.objects.clear_cache() def test_has_perm(self): user = self.UserModel._default_manager.get(pk=self.user.pk) self.assertEqual(user.has_perm('auth.test'), False) user.is_staff = True user.save() self.assertEqual(user.has_perm('auth.test'), False) user.is_superuser = True user.save() self.assertEqual(user.has_perm('auth.test'), True) user.is_staff = True user.is_superuser = True user.is_active = False user.save() self.assertEqual(user.has_perm('auth.test'), False) def test_custom_perms(self): user = self.UserModel._default_manager.get(pk=self.user.pk) content_type = ContentType.objects.get_for_model(Group) perm = Permission.objects.create(name='test', content_type=content_type, codename='test') user.user_permissions.add(perm) # reloading user to purge the _perm_cache user = self.UserModel._default_manager.get(pk=self.user.pk) self.assertEqual(user.get_all_permissions() == {'auth.test'}, True) self.assertEqual(user.get_group_permissions(), set()) self.assertEqual(user.has_module_perms('Group'), False) self.assertEqual(user.has_module_perms('auth'), True) perm = Permission.objects.create(name='test2', content_type=content_type, codename='test2') user.user_permissions.add(perm) perm = Permission.objects.create(name='test3', content_type=content_type, codename='test3') user.user_permissions.add(perm) user = self.UserModel._default_manager.get(pk=self.user.pk) self.assertEqual(user.get_all_permissions(), {'auth.test2', 'auth.test', 'auth.test3'}) self.assertEqual(user.has_perm('test'), False) self.assertEqual(user.has_perm('auth.test'), True) self.assertEqual(user.has_perms(['auth.test2', 'auth.test3']), True) perm = Permission.objects.create(name='test_group', content_type=content_type, codename='test_group') group = Group.objects.create(name='test_group') group.permissions.add(perm) user.groups.add(group) user = self.UserModel._default_manager.get(pk=self.user.pk) exp = {'auth.test2', 'auth.test', 'auth.test3', 'auth.test_group'} self.assertEqual(user.get_all_permissions(), exp) self.assertEqual(user.get_group_permissions(), {'auth.test_group'}) self.assertEqual(user.has_perms(['auth.test3', 'auth.test_group']), True) user = AnonymousUser() self.assertEqual(user.has_perm('test'), False) self.assertEqual(user.has_perms(['auth.test2', 'auth.test3']), False) def test_has_no_object_perm(self): """Regressiontest for #12462""" user = self.UserModel._default_manager.get(pk=self.user.pk) content_type = ContentType.objects.get_for_model(Group) perm = Permission.objects.create(name='test', content_type=content_type, codename='test') user.user_permissions.add(perm) self.assertEqual(user.has_perm('auth.test', 'object'), False) self.assertEqual(user.get_all_permissions('object'), set()) self.assertEqual(user.has_perm('auth.test'), True) self.assertEqual(user.get_all_permissions(), {'auth.test'}) def test_anonymous_has_no_permissions(self): """ #17903 -- Anonymous users shouldn't have permissions in ModelBackend.get_(all|user|group)_permissions(). """ backend = ModelBackend() user = self.UserModel._default_manager.get(pk=self.user.pk) content_type = ContentType.objects.get_for_model(Group) user_perm = Permission.objects.create(name='test', content_type=content_type, codename='test_user') group_perm = Permission.objects.create(name='test2', content_type=content_type, codename='test_group') user.user_permissions.add(user_perm) group = Group.objects.create(name='test_group') user.groups.add(group) group.permissions.add(group_perm) self.assertEqual(backend.get_all_permissions(user), {'auth.test_user', 'auth.test_group'}) self.assertEqual(backend.get_user_permissions(user), {'auth.test_user', 'auth.test_group'}) self.assertEqual(backend.get_group_permissions(user), {'auth.test_group'}) user.is_anonymous = lambda: True self.assertEqual(backend.get_all_permissions(user), set()) self.assertEqual(backend.get_user_permissions(user), set()) self.assertEqual(backend.get_group_permissions(user), set()) def test_inactive_has_no_permissions(self): """ #17903 -- Inactive users shouldn't have permissions in ModelBackend.get_(all|user|group)_permissions(). """ backend = ModelBackend() user = self.UserModel._default_manager.get(pk=self.user.pk) content_type = ContentType.objects.get_for_model(Group) user_perm = Permission.objects.create(name='test', content_type=content_type, codename='test_user') group_perm = Permission.objects.create(name='test2', content_type=content_type, codename='test_group') user.user_permissions.add(user_perm) group = Group.objects.create(name='test_group') user.groups.add(group) group.permissions.add(group_perm) self.assertEqual(backend.get_all_permissions(user), {'auth.test_user', 'auth.test_group'}) self.assertEqual(backend.get_user_permissions(user), {'auth.test_user', 'auth.test_group'}) self.assertEqual(backend.get_group_permissions(user), {'auth.test_group'}) user.is_active = False user.save() self.assertEqual(backend.get_all_permissions(user), set()) self.assertEqual(backend.get_user_permissions(user), set()) self.assertEqual(backend.get_group_permissions(user), set()) def test_get_all_superuser_permissions(self): """A superuser has all permissions. Refs #14795.""" user = self.UserModel._default_manager.get(pk=self.superuser.pk) self.assertEqual(len(user.get_all_permissions()), len(Permission.objects.all())) @override_settings(PASSWORD_HASHERS=['auth_tests.test_auth_backends.CountingMD5PasswordHasher']) def test_authentication_timing(self): """Hasher is run once regardless of whether the user exists. Refs #20760.""" # Re-set the password, because this tests overrides PASSWORD_HASHERS self.user.set_password('test') self.user.save() CountingMD5PasswordHasher.calls = 0 username = getattr(self.user, self.UserModel.USERNAME_FIELD) authenticate(username=username, password='test') self.assertEqual(CountingMD5PasswordHasher.calls, 1) CountingMD5PasswordHasher.calls = 0 authenticate(username='no_such_user', password='test') self.assertEqual(CountingMD5PasswordHasher.calls, 1) class ModelBackendTest(BaseModelBackendTest, TestCase): """ Tests for the ModelBackend using the default User model. """ UserModel = User def create_users(self): self.user = User.objects.create_user( username='test', email='test@example.com', password='test', ) self.superuser = User.objects.create_superuser( username='test2', email='test2@example.com', password='test', ) @override_settings(AUTH_USER_MODEL='auth_tests.ExtensionUser') class ExtensionUserModelBackendTest(BaseModelBackendTest, TestCase): """ Tests for the ModelBackend using the custom ExtensionUser model. This isn't a perfect test, because both the User and ExtensionUser are synchronized to the database, which wouldn't ordinary happen in production. As a result, it doesn't catch errors caused by the non- existence of the User table. The specific problem is queries on .filter(groups__user) et al, which makes an implicit assumption that the user model is called 'User'. In production, the auth.User table won't exist, so the requested join won't exist either; in testing, the auth.User *does* exist, and so does the join. However, the join table won't contain any useful data; for testing, we check that the data we expect actually does exist. """ UserModel = ExtensionUser def create_users(self): self.user = ExtensionUser._default_manager.create_user( username='test', email='test@example.com', password='test', date_of_birth=date(2006, 4, 25) ) self.superuser = ExtensionUser._default_manager.create_superuser( username='test2', email='test2@example.com', password='test', date_of_birth=date(1976, 11, 8) ) @override_settings(AUTH_USER_MODEL='auth_tests.CustomPermissionsUser') class CustomPermissionsUserModelBackendTest(BaseModelBackendTest, TestCase): """ Tests for the ModelBackend using the CustomPermissionsUser model. As with the ExtensionUser test, this isn't a perfect test, because both the User and CustomPermissionsUser are synchronized to the database, which wouldn't ordinary happen in production. """ UserModel = CustomPermissionsUser def create_users(self): self.user = CustomPermissionsUser._default_manager.create_user( email='test@example.com', password='test', date_of_birth=date(2006, 4, 25) ) self.superuser = CustomPermissionsUser._default_manager.create_superuser( email='test2@example.com', password='test', date_of_birth=date(1976, 11, 8) ) @override_settings(AUTH_USER_MODEL='auth_tests.CustomUser') class CustomUserModelBackendAuthenticateTest(TestCase): """ Tests that the model backend can accept a credentials kwarg labeled with custom user model's USERNAME_FIELD. """ def test_authenticate(self): test_user = CustomUser._default_manager.create_user( email='test@example.com', password='test', date_of_birth=date(2006, 4, 25) ) authenticated_user = authenticate(email='test@example.com', password='test') self.assertEqual(test_user, authenticated_user) @override_settings(AUTH_USER_MODEL='auth_tests.UUIDUser') class UUIDUserTests(TestCase): def test_login(self): """ A custom user with a UUID primary key should be able to login. """ user = UUIDUser.objects.create_user(username='uuid', password='test') self.assertTrue(self.client.login(username='uuid', password='test')) self.assertEqual(UUIDUser.objects.get(pk=self.client.session[SESSION_KEY]), user) class TestObj(object): pass class SimpleRowlevelBackend(object): def has_perm(self, user, perm, obj=None): if not obj: return # We only support row level perms if isinstance(obj, TestObj): if user.username == 'test2': return True elif user.is_anonymous() and perm == 'anon': return True elif not user.is_active and perm == 'inactive': return True return False def has_module_perms(self, user, app_label): if not user.is_anonymous() and not user.is_active: return False return app_label == "app1" def get_all_permissions(self, user, obj=None): if not obj: return [] # We only support row level perms if not isinstance(obj, TestObj): return ['none'] if user.is_anonymous(): return ['anon'] if user.username == 'test2': return ['simple', 'advanced'] else: return ['simple'] def get_group_permissions(self, user, obj=None): if not obj: return # We only support row level perms if not isinstance(obj, TestObj): return ['none'] if 'test_group' in [group.name for group in user.groups.all()]: return ['group_perm'] else: return ['none'] @modify_settings(AUTHENTICATION_BACKENDS={ 'append': 'auth_tests.test_auth_backends.SimpleRowlevelBackend', }) class RowlevelBackendTest(TestCase): """ Tests for auth backend that supports object level permissions """ def setUp(self): self.user1 = User.objects.create_user('test', 'test@example.com', 'test') self.user2 = User.objects.create_user('test2', 'test2@example.com', 'test') self.user3 = User.objects.create_user('test3', 'test3@example.com', 'test') def tearDown(self): # The get_group_permissions test messes with ContentTypes, which will # be cached; flush the cache to ensure there are no side effects # Refs #14975, #14925 ContentType.objects.clear_cache() def test_has_perm(self): self.assertEqual(self.user1.has_perm('perm', TestObj()), False) self.assertEqual(self.user2.has_perm('perm', TestObj()), True) self.assertEqual(self.user2.has_perm('perm'), False) self.assertEqual(self.user2.has_perms(['simple', 'advanced'], TestObj()), True) self.assertEqual(self.user3.has_perm('perm', TestObj()), False) self.assertEqual(self.user3.has_perm('anon', TestObj()), False) self.assertEqual(self.user3.has_perms(['simple', 'advanced'], TestObj()), False) def test_get_all_permissions(self): self.assertEqual(self.user1.get_all_permissions(TestObj()), {'simple'}) self.assertEqual(self.user2.get_all_permissions(TestObj()), {'simple', 'advanced'}) self.assertEqual(self.user2.get_all_permissions(), set()) def test_get_group_permissions(self): group = Group.objects.create(name='test_group') self.user3.groups.add(group) self.assertEqual(self.user3.get_group_permissions(TestObj()), {'group_perm'}) @override_settings( AUTHENTICATION_BACKENDS=['auth_tests.test_auth_backends.SimpleRowlevelBackend'], ) class AnonymousUserBackendTest(SimpleTestCase): """ Tests for AnonymousUser delegating to backend. """ def setUp(self): self.user1 = AnonymousUser() def test_has_perm(self): self.assertEqual(self.user1.has_perm('perm', TestObj()), False) self.assertEqual(self.user1.has_perm('anon', TestObj()), True) def test_has_perms(self): self.assertEqual(self.user1.has_perms(['anon'], TestObj()), True) self.assertEqual(self.user1.has_perms(['anon', 'perm'], TestObj()), False) def test_has_module_perms(self): self.assertEqual(self.user1.has_module_perms("app1"), True) self.assertEqual(self.user1.has_module_perms("app2"), False) def test_get_all_permissions(self): self.assertEqual(self.user1.get_all_permissions(TestObj()), {'anon'}) @override_settings(AUTHENTICATION_BACKENDS=[]) class NoBackendsTest(TestCase): """ Tests that an appropriate error is raised if no auth backends are provided. """ def setUp(self): self.user = User.objects.create_user('test', 'test@example.com', 'test') def test_raises_exception(self): with self.assertRaises(ImproperlyConfigured): self.user.has_perm(('perm', TestObj())) @override_settings(AUTHENTICATION_BACKENDS=['auth_tests.test_auth_backends.SimpleRowlevelBackend']) class InActiveUserBackendTest(TestCase): """ Tests for an inactive user """ def setUp(self): self.user1 = User.objects.create_user('test', 'test@example.com', 'test') self.user1.is_active = False self.user1.save() def test_has_perm(self): self.assertEqual(self.user1.has_perm('perm', TestObj()), False) self.assertEqual(self.user1.has_perm('inactive', TestObj()), True) def test_has_module_perms(self): self.assertEqual(self.user1.has_module_perms("app1"), False) self.assertEqual(self.user1.has_module_perms("app2"), False) class PermissionDeniedBackend(object): """ Always raises PermissionDenied in `authenticate`, `has_perm` and `has_module_perms`. """ def authenticate(self, username=None, password=None): raise PermissionDenied def has_perm(self, user_obj, perm, obj=None): raise PermissionDenied def has_module_perms(self, user_obj, app_label): raise PermissionDenied class PermissionDeniedBackendTest(TestCase): """ Tests that other backends are not checked once a backend raises PermissionDenied """ backend = 'auth_tests.test_auth_backends.PermissionDeniedBackend' def setUp(self): self.user1 = User.objects.create_user('test', 'test@example.com', 'test') self.user1.save() @modify_settings(AUTHENTICATION_BACKENDS={'prepend': backend}) def test_permission_denied(self): "user is not authenticated after a backend raises permission denied #2550" self.assertEqual(authenticate(username='test', password='test'), None) @modify_settings(AUTHENTICATION_BACKENDS={'append': backend}) def test_authenticates(self): self.assertEqual(authenticate(username='test', password='test'), self.user1) @modify_settings(AUTHENTICATION_BACKENDS={'prepend': backend}) def test_has_perm_denied(self): content_type = ContentType.objects.get_for_model(Group) perm = Permission.objects.create(name='test', content_type=content_type, codename='test') self.user1.user_permissions.add(perm) self.assertIs(self.user1.has_perm('auth.test'), False) self.assertIs(self.user1.has_module_perms('auth'), False) @modify_settings(AUTHENTICATION_BACKENDS={'append': backend}) def test_has_perm(self): content_type = ContentType.objects.get_for_model(Group) perm = Permission.objects.create(name='test', content_type=content_type, codename='test') self.user1.user_permissions.add(perm) self.assertIs(self.user1.has_perm('auth.test'), True) self.assertIs(self.user1.has_module_perms('auth'), True) class NewModelBackend(ModelBackend): pass class ChangedBackendSettingsTest(TestCase): """ Tests for changes in the settings.AUTHENTICATION_BACKENDS """ backend = 'auth_tests.test_auth_backends.NewModelBackend' TEST_USERNAME = 'test_user' TEST_PASSWORD = 'test_password' TEST_EMAIL = 'test@example.com' def setUp(self): User.objects.create_user(self.TEST_USERNAME, self.TEST_EMAIL, self.TEST_PASSWORD) @override_settings(AUTHENTICATION_BACKENDS=[backend]) def test_changed_backend_settings(self): """ Tests that removing a backend configured in AUTHENTICATION_BACKENDS make already logged-in users disconnect. """ # Get a session for the test user self.assertTrue(self.client.login( username=self.TEST_USERNAME, password=self.TEST_PASSWORD) ) # Prepare a request object request = HttpRequest() request.session = self.client.session # Remove NewModelBackend with self.settings(AUTHENTICATION_BACKENDS=[ 'django.contrib.auth.backends.ModelBackend']): # Get the user from the request user = get_user(request) # Assert that the user retrieval is successful and the user is # anonymous as the backend is not longer available. self.assertIsNotNone(user) self.assertTrue(user.is_anonymous()) class TypeErrorBackend(object): """ Always raises TypeError. """ def authenticate(self, username=None, password=None): raise TypeError class TypeErrorBackendTest(TestCase): """ Tests that a TypeError within a backend is propagated properly. Regression test for ticket #18171 """ backend = 'auth_tests.test_auth_backends.TypeErrorBackend' def setUp(self): self.user1 = User.objects.create_user('test', 'test@example.com', 'test') @override_settings(AUTHENTICATION_BACKENDS=[backend]) def test_type_error_raised(self): with self.assertRaises(TypeError): authenticate(username='test', password='test') class ImproperlyConfiguredUserModelTest(TestCase): """ Tests that an exception from within get_user_model is propagated and doesn't raise an UnboundLocalError. Regression test for ticket #21439 """ def setUp(self): self.user1 = User.objects.create_user('test', 'test@example.com', 'test') self.client.login( username='test', password='test' ) @override_settings(AUTH_USER_MODEL='thismodel.doesntexist') def test_does_not_shadow_exception(self): # Prepare a request object request = HttpRequest() request.session = self.client.session with self.assertRaises(ImproperlyConfigured): get_user(request) class ImportedModelBackend(ModelBackend): pass class CustomModelBackend(ModelBackend): pass class OtherModelBackend(ModelBackend): pass class ImportedBackendTests(TestCase): """ #23925 - The backend path added to the session should be the same as the one defined in AUTHENTICATION_BACKENDS setting. """ backend = 'auth_tests.backend_alias.ImportedModelBackend' @override_settings(AUTHENTICATION_BACKENDS=[backend]) def test_backend_path(self): username = 'username' password = 'password' User.objects.create_user(username, 'email', password) self.assertTrue(self.client.login(username=username, password=password)) request = HttpRequest() request.session = self.client.session self.assertEqual(request.session[BACKEND_SESSION_KEY], self.backend) class SelectingBackendTests(TestCase): backend = 'auth_tests.test_auth_backends.CustomModelBackend' other_backend = 'auth_tests.test_auth_backends.OtherModelBackend' username = 'username' password = 'password' def assertBackendInSession(self, backend): request = HttpRequest() request.session = self.client.session self.assertEqual(request.session[BACKEND_SESSION_KEY], backend) @override_settings(AUTHENTICATION_BACKENDS=[backend]) def test_backend_path_login_without_authenticate_single_backend(self): user = User.objects.create_user(self.username, 'email', self.password) self.client._login(user) self.assertBackendInSession(self.backend) @override_settings(AUTHENTICATION_BACKENDS=[backend, other_backend]) def test_backend_path_login_without_authenticate_multiple_backends(self): user = User.objects.create_user(self.username, 'email', self.password) expected_message = ( 'You have multiple authentication backends configured and ' 'therefore must provide the `backend` argument or set the ' '`backend` attribute on the user.' ) with self.assertRaisesMessage(ValueError, expected_message): self.client._login(user) @override_settings(AUTHENTICATION_BACKENDS=[backend, other_backend]) def test_backend_path_login_with_explicit_backends(self): user = User.objects.create_user(self.username, 'email', self.password) self.client._login(user, self.other_backend) self.assertBackendInSession(self.other_backend)