Using capabilities instead of roles for access control.

attract/__init__.py

@@ -15,15 +15,20 @@ import attract.shots_and_assets
 
 EXTENSION_NAME = 'attract'
 
-# Roles required to view task or shot details.
-ROLES_REQUIRED_TO_VIEW_ITEMS = {'demo', 'subscriber', 'admin'}
-
 
 class AttractExtension(PillarExtension):
     has_project_settings = True
     user_roles = {'attract-user'}
     user_roles_indexable = {'attract-user'}
 
+    user_caps = {
+        'attract-user': {'attract-view', 'attract-use'},
+        'org-attract': {'attract-view', 'attract-use'},
+        'subscriber': {'attract-view'},
+        'demo': {'attract-view'},
+        'admin': {'attract-view', 'attract-use'},
+    }
+
     def __init__(self):
         self._log = logging.getLogger('%s.AttractExtension' % __name__)
         self.task_manager = attract.tasks.TaskManager()

attract/auth.py

@@ -6,10 +6,6 @@ import bson
 
 from pillar import attrs_extra
 
-# Having either of these roles is minimum requirement for using Attract.
-ROLES_REQUIRED_TO_USE_ATTRACT = {'attract-user', 'admin'}
-ROLES_REQUIRED_TO_VIEW_ATTRACT = {'admin', 'subscriber', 'demo'}
-
 # Having any of these methods on a project means you can use Attract.
 # Prerequisite: the project is set up for Attract and has a Manager assigned to it.
 PROJECT_METHODS_TO_USE_ATTRACT = {'PUT'}
@@ -20,10 +16,10 @@ class Actions(enum.Enum):
     USE = 'use'
 
 
-# Required roles for a given action.
-req_roles = {
-    Actions.VIEW: ROLES_REQUIRED_TO_VIEW_ATTRACT,
-    Actions.USE: ROLES_REQUIRED_TO_USE_ATTRACT,
+# Required capability for a given action.
+req_cap = {
+    Actions.VIEW: 'attract-view',
+    Actions.USE: 'attract-use',
 }
 
 
@@ -45,23 +41,21 @@ class Auth(object):
         """Returns True iff the user has Attract User role."""
 
         from pillar import current_app
+        from pillar.auth import UserClass
 
         assert isinstance(user_id, bson.ObjectId)
 
         # TODO: move role checking code to Pillar.
         users_coll = current_app.db('users')
-        user = users_coll.find_one({'_id': user_id}, {'roles': 1})
-        if not user:
+        db_user = users_coll.find_one({'_id': user_id}, {'roles': 1})
+        if not db_user:
             self._log.debug('user_is_attract_user: User %s not found', user_id)
             return False
 
-        user_roles = set(user.get('roles', []))
-        require_roles = set(ROLES_REQUIRED_TO_USE_ATTRACT)
+        user = UserClass.construct('', db_user)
+        return user.has_cap('attract-use')
 
-        intersection = require_roles.intersection(user_roles)
-        return bool(intersection)
-
-    def current_user_may(self, action: Actions, project_id: bson.ObjectId=None) -> bool:
+    def current_user_may(self, action: Actions, project_id: bson.ObjectId = None) -> bool:
         """Returns True iff the user is authorised to use/view Attract on the current project.
 
         Requires that determine_user_rights() was called before.
@@ -86,20 +80,18 @@ class Auth(object):
         g.attract_rights is a frozenset that contains zero or more Actions.
         """
 
-        from pillar.api.utils.authorization import user_matches_roles
-        from pillar.api.utils.authentication import current_user_id
+        from pillar.auth import current_user
         from pillar.api.projects.utils import user_rights_in_project
 
-        user_id = current_user_id()
-        if not user_id:
+        if current_user.is_anonymous:
             self._log.debug('Anonymous user never has access to Attract.')
             flask.g.attract_rights = frozenset()
             return
 
         rights = set()
         for action in Actions:
-            roles = req_roles[action]
-            if user_matches_roles(roles):
+            cap = req_cap[action]
+            if current_user.has_cap(cap):
                 rights.add(action)
 
         # TODO Sybren: possibly split this up into a manager-fetching func + authorisation func.

attract/routes.py

@@ -5,7 +5,7 @@ from flask import Blueprint, render_template, redirect, url_for, request, jsonif
 import flask_login
 import werkzeug.exceptions as wz_exceptions
 
-from pillar.auth import current_web_user as current_user
+from pillar.auth import current_user as current_user
 from pillar.api.utils import str2id
 from pillar.web.utils import attach_project_pictures
 import pillar.web.subquery

attract/shots_and_assets/routes_common.py

@@ -1,14 +1,14 @@
 import logging
 
 import flask
-import flask_login
 import werkzeug.exceptions as wz_exceptions
 
 import pillarsdk
 from pillar.web.system_util import pillar_api
 from pillar.web.utils import get_file
+from pillar.auth import current_user
 
-from attract import current_attract, ROLES_REQUIRED_TO_VIEW_ITEMS
+from attract import current_attract
 
 log = logging.getLogger(__name__)
 
@@ -53,12 +53,10 @@ def for_project(node_type_name, task_types_for_nt, project, attract_props,
 
 def view_node(project, node_id, node_type_name):
     """Returns the node if the user has access.
-
-    Uses attract.ROLES_REQUIRED_TO_VIEW_ITEMS to check permissions.
     """
 
     # asset list is public, asset details are not.
-    if not flask_login.current_user.has_role(*ROLES_REQUIRED_TO_VIEW_ITEMS):
+    if not current_user.has_cap('attract-view'):
         raise wz_exceptions.Forbidden()
 
     api = pillar_api()

attract/tasks/routes.py

@@ -10,11 +10,12 @@ import pillarsdk
 from pillar.web.system_util import pillar_api
 import pillar.api.utils
 import pillar.web.subquery
+from pillar.auth import current_user
 
 from attract.routes import attract_project_view
 from attract.node_types.task import node_type_task
 from attract.node_types.shot import node_type_shot
-from attract import current_attract, ROLES_REQUIRED_TO_VIEW_ITEMS, EXTENSION_NAME
+from attract import current_attract, EXTENSION_NAME
 
 blueprint = Blueprint('attract.tasks', __name__, url_prefix='/tasks')
 perproject_blueprint = Blueprint('attract.tasks.perproject', __name__,
@@ -65,7 +66,7 @@ def view_task(project, attract_props, task_id):
         return for_project(project, task_id=task_id)
 
     # Task list is public, task details are not.
-    if not flask_login.current_user.has_role(*ROLES_REQUIRED_TO_VIEW_ITEMS):
+    if not current_user.has_cap('attract-view'):
         raise wz_exceptions.Forbidden()
 
     api = pillar_api()