##// END OF EJS Templates
vcs: Minimal change to expose the shadow repository...
vcs: Minimal change to expose the shadow repository Based on my original research, this was the "minimal" starting point. It shows that three concepts are needed for the "repo_name": * From the security standpoint we think of the shadow repository having the same ACL as the target repository of the pull request. This is because the pull request itself is considered to be a part of the target repository. Out of this thought, the variable "acl_repo_name" is used whenever we want to check permissions or when we need the database configuration of the repository. An alternative name would have been "db_repo_name", but the usage for ACL checking is the most important one. * From the web interaction perspective, we need the URL which was originally used to get to the repository. This is because based on this base URL commands can be identified. Especially for Git this is important, so that the commands are correctly recognized. Since the URL is in the focus, this is called "url_repo_name". * Finally we have to deal with the repository on the file system. This is what the VCS layer deal with normally, so this name is called "vcs_repo_name". The original repository interaction is a special case where all three names are the same. When interacting with a pull request, these three names are typically all different. This change is minimal in a sense that it just makes the interaction with a shadow repository barely work, without checking any special constraints yet. This was the starting point for further work on this topic.

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test_permissions.py
692 lines | 27.3 KiB | text/x-python | PythonLexer
# -*- coding: utf-8 -*-
# Copyright (C) 2010-2016 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/
import pytest
from rhodecode.lib.auth import AuthUser
from rhodecode.model.db import (
RepoGroup, User, UserGroupRepoGroupToPerm, Permission, UserToPerm,
UserGroupToPerm)
from rhodecode.model.meta import Session
from rhodecode.model.permission import PermissionModel
from rhodecode.model.repo import RepoModel
from rhodecode.model.repo_group import RepoGroupModel
from rhodecode.model.user import UserModel
from rhodecode.model.user_group import UserGroupModel
from rhodecode.tests.fixture import Fixture
fixture = Fixture()
@pytest.fixture
def repo_name(backend_hg):
return backend_hg.repo_name
class TestPermissions(object):
@pytest.fixture(scope='class', autouse=True)
def default_permissions(self, request, pylonsapp):
# recreate default user to get a clean start
PermissionModel().create_default_user_permissions(
user=User.DEFAULT_USER, force=True)
Session().commit()
@pytest.fixture(autouse=True)
def prepare_users(self, request):
# TODO: User creation is a duplicate of test_nofitications, check
# if that can be unified
self.u1 = UserModel().create_or_update(
username=u'u1', password=u'qweqwe',
email=u'u1@rhodecode.org', firstname=u'u1', lastname=u'u1'
)
self.u2 = UserModel().create_or_update(
username=u'u2', password=u'qweqwe',
email=u'u2@rhodecode.org', firstname=u'u2', lastname=u'u2'
)
self.u3 = UserModel().create_or_update(
username=u'u3', password=u'qweqwe',
email=u'u3@rhodecode.org', firstname=u'u3', lastname=u'u3'
)
self.anon = User.get_default_user()
self.a1 = UserModel().create_or_update(
username=u'a1', password=u'qweqwe',
email=u'a1@rhodecode.org', firstname=u'a1', lastname=u'a1',
admin=True
)
Session().commit()
request.addfinalizer(self.cleanup)
def cleanup(self):
if hasattr(self, 'test_repo'):
RepoModel().delete(repo=self.test_repo)
if hasattr(self, 'g1'):
RepoGroupModel().delete(self.g1.group_id)
if hasattr(self, 'g2'):
RepoGroupModel().delete(self.g2.group_id)
UserModel().delete(self.u1)
UserModel().delete(self.u2)
UserModel().delete(self.u3)
UserModel().delete(self.a1)
if hasattr(self, 'ug1'):
UserGroupModel().delete(self.ug1, force=True)
Session().commit()
def test_default_perms_set(self, repo_name):
assert repo_perms(self.u1)[repo_name] == 'repository.read'
new_perm = 'repository.write'
RepoModel().grant_user_permission(repo=repo_name, user=self.u1,
perm=new_perm)
Session().commit()
assert repo_perms(self.u1)[repo_name] == new_perm
def test_default_admin_perms_set(self, repo_name):
assert repo_perms(self.a1)[repo_name] == 'repository.admin'
RepoModel().grant_user_permission(repo=repo_name, user=self.a1,
perm='repository.write')
Session().commit()
# cannot really downgrade admins permissions !? they still gets set as
# admin !
assert repo_perms(self.a1)[repo_name] == 'repository.admin'
def test_default_group_perms(self, repo_name):
self.g1 = fixture.create_repo_group('test1', skip_if_exists=True)
self.g2 = fixture.create_repo_group('test2', skip_if_exists=True)
assert repo_perms(self.u1)[repo_name] == 'repository.read'
assert group_perms(self.u1) == {
'test1': 'group.read', 'test2': 'group.read'}
assert global_perms(self.u1) == set(
Permission.DEFAULT_USER_PERMISSIONS)
def test_default_admin_group_perms(self, repo_name):
self.g1 = fixture.create_repo_group('test1', skip_if_exists=True)
self.g2 = fixture.create_repo_group('test2', skip_if_exists=True)
assert repo_perms(self.a1)[repo_name] == 'repository.admin'
assert group_perms(self.a1) == {
'test1': 'group.admin', 'test2': 'group.admin'}
def test_default_owner_group_perms(self):
# "u1" shall be owner without any special permission assigned
self.g1 = fixture.create_repo_group('test1')
assert group_perms(self.u1) == {'test1': 'group.read'}
# Make him owner, but do not add any special permissions
self.g1.user = self.u1
assert group_perms(self.u1) == {'test1': 'group.admin'}
def test_propagated_permission_from_users_group_by_explicit_perms_exist(
self, repo_name):
# make group
self.ug1 = fixture.create_user_group('G1')
UserGroupModel().add_user_to_group(self.ug1, self.u1)
# set permission to lower
new_perm = 'repository.none'
RepoModel().grant_user_permission(
repo=repo_name, user=self.u1, perm=new_perm)
Session().commit()
assert repo_perms(self.u1)[repo_name] == new_perm
# grant perm for group this should not override permission from user
# since it has explicitly set
new_perm_gr = 'repository.write'
RepoModel().grant_user_group_permission(
repo=repo_name, group_name=self.ug1, perm=new_perm_gr)
assert repo_perms(self.u1)[repo_name] == new_perm
assert group_perms(self.u1) == {}
def test_propagated_permission_from_users_group(self, repo_name):
# make group
self.ug1 = fixture.create_user_group('G1')
UserGroupModel().add_user_to_group(self.ug1, self.u3)
# grant perm for group
# this should override default permission from user
new_perm_gr = 'repository.write'
RepoModel().grant_user_group_permission(
repo=repo_name, group_name=self.ug1, perm=new_perm_gr)
assert repo_perms(self.u3)[repo_name] == new_perm_gr
assert group_perms(self.u3) == {}
def test_propagated_permission_from_users_group_lower_weight(
self, repo_name):
# make group with user
self.ug1 = fixture.create_user_group('G1')
UserGroupModel().add_user_to_group(self.ug1, self.u1)
# set permission to lower
new_perm_h = 'repository.write'
RepoModel().grant_user_permission(
repo=repo_name, user=self.u1, perm=new_perm_h)
Session().commit()
assert repo_perms(self.u1)[repo_name] == new_perm_h
# grant perm for group this should NOT override permission from user
# since it's lower than granted
new_perm_l = 'repository.read'
RepoModel().grant_user_group_permission(
repo=repo_name, group_name=self.ug1, perm=new_perm_l)
assert repo_perms(self.u1)[repo_name] == new_perm_h
assert group_perms(self.u1) == {}
def test_repo_in_group_permissions(self):
self.g1 = fixture.create_repo_group('group1', skip_if_exists=True)
self.g2 = fixture.create_repo_group('group2', skip_if_exists=True)
# both perms should be read !
assert group_perms(self.u1) == \
{u'group1': u'group.read', u'group2': u'group.read'}
assert group_perms(self.anon) == \
{u'group1': u'group.read', u'group2': u'group.read'}
# Change perms to none for both groups
RepoGroupModel().grant_user_permission(
repo_group=self.g1, user=self.anon, perm='group.none')
RepoGroupModel().grant_user_permission(
repo_group=self.g2, user=self.anon, perm='group.none')
assert group_perms(self.u1) == \
{u'group1': u'group.none', u'group2': u'group.none'}
assert group_perms(self.anon) == \
{u'group1': u'group.none', u'group2': u'group.none'}
# add repo to group
name = RepoGroup.url_sep().join([self.g1.group_name, 'test_perm'])
self.test_repo = fixture.create_repo(name=name,
repo_type='hg',
repo_group=self.g1,
cur_user=self.u1,)
assert group_perms(self.u1) == \
{u'group1': u'group.none', u'group2': u'group.none'}
assert group_perms(self.anon) == \
{u'group1': u'group.none', u'group2': u'group.none'}
# grant permission for u2 !
RepoGroupModel().grant_user_permission(
repo_group=self.g1, user=self.u2, perm='group.read')
RepoGroupModel().grant_user_permission(
repo_group=self.g2, user=self.u2, perm='group.read')
Session().commit()
assert self.u1 != self.u2
# u1 and anon should have not change perms while u2 should !
assert group_perms(self.u1) == \
{u'group1': u'group.none', u'group2': u'group.none'}
assert group_perms(self.u2) == \
{u'group1': u'group.read', u'group2': u'group.read'}
assert group_perms(self.anon) == \
{u'group1': u'group.none', u'group2': u'group.none'}
def test_repo_group_user_as_user_group_member(self):
# create Group1
self.g1 = fixture.create_repo_group('group1', skip_if_exists=True)
assert group_perms(self.anon) == {u'group1': u'group.read'}
# set default permission to none
RepoGroupModel().grant_user_permission(
repo_group=self.g1, user=self.anon, perm='group.none')
# make group
self.ug1 = fixture.create_user_group('G1')
# add user to group
UserGroupModel().add_user_to_group(self.ug1, self.u1)
Session().commit()
# check if user is in the group
ug1 = UserGroupModel().get(self.ug1.users_group_id)
members = [x.user_id for x in ug1.members]
assert members == [self.u1.user_id]
# add some user to that group
# check his permissions
assert group_perms(self.anon) == {u'group1': u'group.none'}
assert group_perms(self.u1) == {u'group1': u'group.none'}
# grant ug1 read permissions for
RepoGroupModel().grant_user_group_permission(
repo_group=self.g1, group_name=self.ug1, perm='group.read')
Session().commit()
# check if the
obj = Session().query(UserGroupRepoGroupToPerm)\
.filter(UserGroupRepoGroupToPerm.group == self.g1)\
.filter(UserGroupRepoGroupToPerm.users_group == self.ug1)\
.scalar()
assert obj.permission.permission_name == 'group.read'
assert group_perms(self.anon) == {u'group1': u'group.none'}
assert group_perms(self.u1) == {u'group1': u'group.read'}
def test_inherited_permissions_from_default_on_user_enabled(self):
# enable fork and create on default user
_form_result = {
'default_repo_create': 'hg.create.repository',
'default_fork_create': 'hg.fork.repository'
}
PermissionModel().set_new_user_perms(
User.get_default_user(), _form_result)
Session().commit()
# make sure inherit flag is turned on
self.u1.inherit_default_permissions = True
Session().commit()
# this user will have inherited permissions from default user
assert global_perms(self.u1) == default_perms()
def test_inherited_permissions_from_default_on_user_disabled(self):
# disable fork and create on default user
_form_result = {
'default_repo_create': 'hg.create.none',
'default_fork_create': 'hg.fork.none'
}
PermissionModel().set_new_user_perms(
User.get_default_user(), _form_result)
Session().commit()
# make sure inherit flag is turned on
self.u1.inherit_default_permissions = True
Session().commit()
# this user will have inherited permissions from default user
expected_perms = default_perms(
added=['hg.create.none', 'hg.fork.none'],
removed=['hg.create.repository', 'hg.fork.repository'])
assert global_perms(self.u1) == expected_perms
def test_non_inherited_permissions_from_default_on_user_enabled(self):
user_model = UserModel()
# enable fork and create on default user
usr = User.DEFAULT_USER
user_model.revoke_perm(usr, 'hg.create.none')
user_model.grant_perm(usr, 'hg.create.repository')
user_model.revoke_perm(usr, 'hg.fork.none')
user_model.grant_perm(usr, 'hg.fork.repository')
# disable global perms on specific user
user_model.revoke_perm(self.u1, 'hg.create.repository')
user_model.grant_perm(self.u1, 'hg.create.none')
user_model.revoke_perm(self.u1, 'hg.fork.repository')
user_model.grant_perm(self.u1, 'hg.fork.none')
# make sure inherit flag is turned off
self.u1.inherit_default_permissions = False
Session().commit()
# this user will have non inherited permissions from he's
# explicitly set permissions
assert global_perms(self.u1) == set([
'hg.create.none',
'hg.fork.none',
'hg.register.manual_activate',
'hg.extern_activate.auto',
'repository.read',
'group.read',
'usergroup.read',
])
def test_non_inherited_permissions_from_default_on_user_disabled(self):
user_model = UserModel()
# disable fork and create on default user
usr = User.DEFAULT_USER
user_model.revoke_perm(usr, 'hg.create.repository')
user_model.grant_perm(usr, 'hg.create.none')
user_model.revoke_perm(usr, 'hg.fork.repository')
user_model.grant_perm(usr, 'hg.fork.none')
# enable global perms on specific user
user_model.revoke_perm(self.u1, 'hg.create.none')
user_model.grant_perm(self.u1, 'hg.create.repository')
user_model.revoke_perm(self.u1, 'hg.fork.none')
user_model.grant_perm(self.u1, 'hg.fork.repository')
# make sure inherit flag is turned off
self.u1.inherit_default_permissions = False
Session().commit()
# this user will have non inherited permissions from he's
# explicitly set permissions
assert global_perms(self.u1) == set([
'hg.create.repository',
'hg.fork.repository',
'hg.register.manual_activate',
'hg.extern_activate.auto',
'repository.read',
'group.read',
'usergroup.read',
])
@pytest.mark.parametrize('perm, expected_perm', [
('hg.inherit_default_perms.false', 'repository.none', ),
('hg.inherit_default_perms.true', 'repository.read', ),
])
def test_inherited_permissions_on_objects(self, perm, expected_perm):
_form_result = {
'default_inherit_default_permissions': perm,
}
PermissionModel().set_new_user_perms(
User.get_default_user(), _form_result)
Session().commit()
# make sure inherit flag is turned on
self.u1.inherit_default_permissions = True
Session().commit()
# this user will have inherited permissions from default user
assert global_perms(self.u1) == set([
'hg.create.none',
'hg.fork.none',
'hg.register.manual_activate',
'hg.extern_activate.auto',
'repository.read',
'group.read',
'usergroup.read',
'hg.create.write_on_repogroup.true',
'hg.usergroup.create.false',
'hg.repogroup.create.false',
perm,
])
assert set(repo_perms(self.u1).values()) == set([expected_perm])
def test_repo_owner_permissions_not_overwritten_by_group(self):
# create repo as USER,
self.test_repo = fixture.create_repo(name='myownrepo',
repo_type='hg',
cur_user=self.u1)
# he has permissions of admin as owner
assert repo_perms(self.u1)['myownrepo'] == 'repository.admin'
# set his permission as user group, he should still be admin
self.ug1 = fixture.create_user_group('G1')
UserGroupModel().add_user_to_group(self.ug1, self.u1)
RepoModel().grant_user_group_permission(
self.test_repo,
group_name=self.ug1,
perm='repository.none')
Session().commit()
assert repo_perms(self.u1)['myownrepo'] == 'repository.admin'
def test_repo_owner_permissions_not_overwritten_by_others(self):
# create repo as USER,
self.test_repo = fixture.create_repo(name='myownrepo',
repo_type='hg',
cur_user=self.u1)
# he has permissions of admin as owner
assert repo_perms(self.u1)['myownrepo'] == 'repository.admin'
# set his permission as user, he should still be admin
RepoModel().grant_user_permission(
self.test_repo, user=self.u1, perm='repository.none')
Session().commit()
assert repo_perms(self.u1)['myownrepo'] == 'repository.admin'
def test_repo_group_owner_permissions_not_overwritten_by_group(self):
# "u1" shall be owner without any special permission assigned
self.g1 = fixture.create_repo_group('test1')
# Make user group and grant a permission to user group
self.ug1 = fixture.create_user_group('G1')
UserGroupModel().add_user_to_group(self.ug1, self.u1)
RepoGroupModel().grant_user_group_permission(
repo_group=self.g1, group_name=self.ug1, perm='group.write')
# Verify that user does not get any special permission if he is not
# owner
assert group_perms(self.u1) == {'test1': 'group.write'}
# Make him owner of the repo group
self.g1.user = self.u1
assert group_perms(self.u1) == {'test1': 'group.admin'}
def test_repo_group_owner_permissions_not_overwritten_by_others(self):
# "u1" shall be owner without any special permission assigned
self.g1 = fixture.create_repo_group('test1')
RepoGroupModel().grant_user_permission(
repo_group=self.g1, user=self.u1, perm='group.write')
# Verify that user does not get any special permission if he is not
# owner
assert group_perms(self.u1) == {'test1': 'group.write'}
# Make him owner of the repo group
self.g1.user = self.u1
assert group_perms(self.u1) == {u'test1': 'group.admin'}
def _test_def_user_perm_equal(
self, user, change_factor=0, compare_keys=None):
perms = UserToPerm.query().filter(UserToPerm.user == user).all()
assert len(perms) == \
len(Permission.DEFAULT_USER_PERMISSIONS) + change_factor
if compare_keys:
assert set(
x.permissions.permission_name for x in perms) == compare_keys
def _test_def_user_group_perm_equal(
self, user_group, change_factor=0, compare_keys=None):
perms = UserGroupToPerm.query().filter(
UserGroupToPerm.users_group == user_group).all()
assert len(perms) == \
len(Permission.DEFAULT_USER_PERMISSIONS) + change_factor
if compare_keys:
assert set(
x.permissions.permission_name for x in perms) == compare_keys
def test_set_default_permissions(self):
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
def test_set_default_permissions_after_one_is_missing(self):
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
# now we delete one, it should be re-created after another call
perms = UserToPerm.query().filter(UserToPerm.user == self.u1).all()
Session().delete(perms[0])
Session().commit()
self._test_def_user_perm_equal(user=self.u1, change_factor=-1)
# create missing one !
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
@pytest.mark.parametrize("perm, modify_to", [
('repository.read', 'repository.none'),
('group.read', 'group.none'),
('usergroup.read', 'usergroup.none'),
('hg.create.repository', 'hg.create.none'),
('hg.fork.repository', 'hg.fork.none'),
('hg.register.manual_activate', 'hg.register.auto_activate',)
])
def test_set_default_permissions_after_modification(self, perm, modify_to):
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
old = Permission.get_by_key(perm)
new = Permission.get_by_key(modify_to)
assert old is not None
assert new is not None
# now modify permissions
p = UserToPerm.query().filter(
UserToPerm.user == self.u1).filter(
UserToPerm.permission == old).one()
p.permission = new
Session().add(p)
Session().commit()
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
def test_clear_user_perms(self):
PermissionModel().create_default_user_permissions(user=self.u1)
self._test_def_user_perm_equal(user=self.u1)
# now clear permissions
cleared = PermissionModel()._clear_user_perms(self.u1.user_id)
self._test_def_user_perm_equal(user=self.u1,
change_factor=len(cleared)*-1)
def test_clear_user_group_perms(self):
self.ug1 = fixture.create_user_group('G1')
PermissionModel().create_default_user_group_permissions(
user_group=self.ug1)
self._test_def_user_group_perm_equal(user_group=self.ug1)
# now clear permissions
cleared = PermissionModel()._clear_user_group_perms(
self.ug1.users_group_id)
self._test_def_user_group_perm_equal(user_group=self.ug1,
change_factor=len(cleared)*-1)
@pytest.mark.parametrize("form_result", [
{},
{'default_repo_create': 'hg.create.repository'},
{'default_repo_create': 'hg.create.repository',
'default_repo_perm': 'repository.read'},
{'default_repo_create': 'hg.create.none',
'default_repo_perm': 'repository.write',
'default_fork_create': 'hg.fork.none'},
])
def test_set_new_user_permissions(self, form_result):
_form_result = {}
_form_result.update(form_result)
PermissionModel().set_new_user_perms(self.u1, _form_result)
Session().commit()
change_factor = -1 * (len(Permission.DEFAULT_USER_PERMISSIONS)
- len(form_result.keys()))
self._test_def_user_perm_equal(
self.u1, change_factor=change_factor)
@pytest.mark.parametrize("form_result", [
{},
{'default_repo_create': 'hg.create.repository'},
{'default_repo_create': 'hg.create.repository',
'default_repo_perm': 'repository.read'},
{'default_repo_create': 'hg.create.none',
'default_repo_perm': 'repository.write',
'default_fork_create': 'hg.fork.none'},
])
def test_set_new_user_group_permissions(self, form_result):
_form_result = {}
_form_result.update(form_result)
self.ug1 = fixture.create_user_group('G1')
PermissionModel().set_new_user_group_perms(self.ug1, _form_result)
Session().commit()
change_factor = -1 * (len(Permission.DEFAULT_USER_PERMISSIONS)
- len(form_result.keys()))
self._test_def_user_group_perm_equal(
self.ug1, change_factor=change_factor)
@pytest.mark.parametrize("group_active, expected_perm", [
(True, 'repository.admin'),
(False, 'repository.read'),
])
def test_get_default_repo_perms_from_user_group_with_active_group(
self, backend, user_util, group_active, expected_perm):
repo = backend.create_repo()
user = user_util.create_user()
user_group = user_util.create_user_group(
members=[user], users_group_active=group_active)
user_util.grant_user_group_permission_to_repo(
repo, user_group, 'repository.admin')
permissions = repo_perms(user)
repo_permission = permissions.get(repo.repo_name)
assert repo_permission == expected_perm
@pytest.mark.parametrize("group_active, expected_perm", [
(True, 'group.admin'),
(False, 'group.read')
])
def test_get_default_group_perms_from_user_group_with_active_group(
self, user_util, group_active, expected_perm):
user = user_util.create_user()
repo_group = user_util.create_repo_group()
user_group = user_util.create_user_group(
members=[user], users_group_active=group_active)
user_util.grant_user_group_permission_to_repo_group(
repo_group, user_group, 'group.admin')
permissions = group_perms(user)
group_permission = permissions.get(repo_group.name)
assert group_permission == expected_perm
@pytest.mark.parametrize("group_active, expected_perm", [
(True, 'usergroup.admin'),
(False, 'usergroup.read')
])
def test_get_default_user_group_perms_from_user_group_with_active_group(
self, user_util, group_active, expected_perm):
user = user_util.create_user()
user_group = user_util.create_user_group(
members=[user], users_group_active=group_active)
target_user_group = user_util.create_user_group()
user_util.grant_user_group_permission_to_user_group(
target_user_group, user_group, 'usergroup.admin')
permissions = user_group_perms(user)
group_permission = permissions.get(target_user_group.users_group_name)
assert group_permission == expected_perm
def repo_perms(user):
auth_user = AuthUser(user_id=user.user_id)
return auth_user.permissions['repositories']
def group_perms(user):
auth_user = AuthUser(user_id=user.user_id)
return auth_user.permissions['repositories_groups']
def user_group_perms(user):
auth_user = AuthUser(user_id=user.user_id)
return auth_user.permissions['user_groups']
def global_perms(user):
auth_user = AuthUser(user_id=user.user_id)
return auth_user.permissions['global']
def default_perms(added=None, removed=None):
expected_perms = set(Permission.DEFAULT_USER_PERMISSIONS)
if removed:
expected_perms.difference_update(removed)
if added:
expected_perms.update(added)
return expected_perms