257 lines
8.5 KiB
Python
257 lines
8.5 KiB
Python
#
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# Copyright (c) 2011 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Common functions and other stuff for working with permissions and roles.
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$Id$
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"""
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from persistent import Persistent
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from zope import component
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from zope.annotation.interfaces import IAttributeAnnotatable
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from zope.app.container.interfaces import IObjectAddedEvent
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from zope.app.security.settings import Allow, Deny, Unset
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from zope.cachedescriptors.property import Lazy
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from zope.interface import implements
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from zope.lifecycleevent import IObjectCreatedEvent, IObjectModifiedEvent
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from zope.security import canAccess, canWrite
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from zope.security import checkPermission as baseCheckPermission
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from zope.security.management import getInteraction
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from zope.securitypolicy.interfaces import IPrincipalRoleManager
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from zope.securitypolicy.interfaces import IRolePermissionManager
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from zope.traversing.api import getName
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from zope.traversing.interfaces import IPhysicallyLocatable
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from loops.common import adapted
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from loops.interfaces import ILoopsObject, IConcept
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from loops.interfaces import IAssignmentEvent, IDeassignmentEvent
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from loops.security.interfaces import ISecuritySetter, IWorkspaceInformation
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allRolesExceptOwner = (
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#'zope.SiteManager' - no, not this one...
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'zope.Anonymous', 'zope.Member', 'zope.ContentManager', 'loops.Staff',
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'loops.xmlrpc.ConceptManager', # relevant for local security?
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#'loops.SiteManager',
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'loops.Member', 'loops.Master',)
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allRolesExceptOwnerAndMaster = tuple(allRolesExceptOwner[:-1])
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minorPrivilegedRoles = ('zope.Anonymous', 'zope.Member',)
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localRoles = ('zope.Anonymous', 'zope.Member', 'zope.ContentManager',
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'loops.SiteManager', 'loops.Staff', 'loops.Member', 'loops.Master',
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'loops.Owner')
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localPermissions = ('zope.ManageContent', 'zope.View', 'loops.ManageWorkspaces',
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'loops.ViewRestricted', 'loops.EditRestricted', 'loops.AssignAsParent',)
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acquiringPredicateNames = ('hasType', 'standard', 'ownedby', 'ispartof')
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allocationPredicateNames = ('isowner', 'ismaster', 'ismember',)
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workspaceGroupsFolderName = 'gloops_ws'
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# checking and querying functions
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def canAccessObject(obj):
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return canAccess(obj, 'title')
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def canListObject(obj, noCheck=False):
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if noCheck:
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return True
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return canAccess(obj, 'title')
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def canWriteObject(obj):
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return canWrite(obj, 'title')
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def canEditRestricted(obj):
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return checkPermission('loops.EditRestricted', obj)
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def canAssignAsParent(obj):
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return checkPermission('loops.AssignAsParent', obj)
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def checkPermission(permission, obj):
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return baseCheckPermission(permission, obj)
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def getCurrentPrincipal():
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interaction = getInteraction()
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if interaction is not None:
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parts = interaction.participations
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if parts:
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return parts[0].principal
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return None
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# functions for checking and setting security properties
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def overrides(s1, s2):
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settings = [Allow, Deny, Unset]
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return settings.index(s1) < settings.index(s2)
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def setRolePermission(rpm, p, r, setting):
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if setting == Allow:
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rpm.grantPermissionToRole(p, r)
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elif setting == Deny:
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rpm.denyPermissionToRole(p, r)
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else:
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rpm.unsetPermissionFromRole(p, r)
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def setPrincipalRole(prm, r, p, setting):
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if setting == Allow:
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prm.assignRoleToPrincipal(r, p)
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elif setting == Deny:
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prm.removeRoleFromPrincipal(r, p)
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else:
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prm.unsetRoleForPrincipal(r, p)
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def assignOwner(obj, principalId):
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prm = IPrincipalRoleManager(obj)
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prm.assignRoleToPrincipal('loops.Owner', principalId)
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def removeOwner(obj, principalId):
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prm = IPrincipalRoleManager(obj)
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prm.removeRoleFromPrincipal('loops.Owner', principalId)
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def allowEditingForOwner(obj, deny=allRolesExceptOwner, revert=False):
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rpm = IRolePermissionManager(obj)
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if revert:
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for role in deny:
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rpm.unsetPermissionFromRole('zope.ManageContent', role)
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rpm.unsetPermissionFromRole('zope.ManageContent', 'loops.Owner')
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else:
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for role in deny:
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rpm.denyPermissionToRole('zope.ManageContent', role)
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rpm.grantPermissionToRole('zope.ManageContent', 'loops.Owner')
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def restrictView(obj, roles=allRolesExceptOwnerAndMaster, revert=False):
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rpm = IRolePermissionManager(obj)
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if revert:
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for role in roles:
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rpm.unsetPermissionFromRole('zope.View', role)
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else:
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for role in roles:
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rpm.denyPermissionToRole('zope.View', role)
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# event handlers
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#@component.adapter(ILoopsObject, IObjectAddedEvent)
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#@component.adapter(ILoopsObject, IObjectModifiedEvent)
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@component.adapter(ILoopsObject, IObjectCreatedEvent)
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def setDefaultSecurity(obj, event):
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aObj = adapted(obj)
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setter = ISecuritySetter(aObj)
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setter.setDefaultSecurity()
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@component.adapter(IConcept, IAssignmentEvent)
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def grantAcquiredSecurity(obj, event):
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aObj = adapted(obj)
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setter = ISecuritySetter(aObj)
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setter.setAcquiredSecurity(event.relation)
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@component.adapter(IConcept, IDeassignmentEvent)
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def revokeAcquiredSecurity(obj, event):
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aObj = adapted(obj)
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setter = ISecuritySetter(aObj)
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setter.setAcquiredSecurity(event.relation, revert=True)
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# workspace handling
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class WorkspaceInformation(Persistent):
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""" For storing security-related stuff pertaining to
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children and resources of the context (=parent) object.
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"""
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implements(IPhysicallyLocatable, IWorkspaceInformation)
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__name__ = u'workspace_information'
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#propagateRolePermissions = 'object' # or 'none'
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propagateRolePermissions = 'workspace'
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propagateParentSecurity = True # False
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#propagateParentSecurity = False
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allocationPredicateNames = allocationPredicateNames
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workspaceGroupsFolderName = workspaceGroupsFolderName
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def __init__(self, parent):
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self.__parent__ = parent
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self.workspaceGroupNames = {}
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def getName(self):
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return self.__name__
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def getParent(self):
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return self.__parent__
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def getWorkspaceGroup(obj, predicate):
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wsi = obj.workspaceInformation
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if wsi is None:
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return None
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pn = getName(predicate)
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if pn in wsi.allocationPredicateNames:
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gn = wsi.workspaceGroupNames
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if not isinstance(gn, dict): # backwards compatibility
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return None
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groupName = gn.get(pn)
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if groupName:
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gfName = wsi.workspaceGroupsFolderName
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if gfName:
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from loops.organize.util import getGroupsFolder
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gf = getGroupsFolder(wsi, gfName)
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if gf is not None:
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return gf.get(groupName)
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return None
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@component.adapter(ILoopsObject, IAssignmentEvent)
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def addGroupMembershipOnAssignment(obj, event):
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group = getWorkspaceGroup(obj, event.relation.predicate)
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if group is not None:
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person = adapted(event.relation.second)
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from loops.organize.interfaces import IPerson
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if IPerson.providedBy(person):
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userId = person.getUserId()
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if userId:
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members = list(group.principals)
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if userId not in members:
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members.append(userId)
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group.principals = tuple(members)
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#print '*** assign', group.__name__, userId, group.principals
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@component.adapter(ILoopsObject, IDeassignmentEvent)
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def removeGroupMembershipOnDeassignment(obj, event):
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group = getWorkspaceGroup(obj, event.relation.predicate)
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if group is not None:
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person = adapted(event.relation.second)
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from loops.organize.interfaces import IPerson
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if IPerson.providedBy(person):
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userId = person.getUserId()
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if userId:
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members = list(group.principals)
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if userId in members:
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members.remove(userId)
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group.principals = tuple(members)
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#print '*** remove', group.__name__, userId, group.principals
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