5271981119
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@2388 fd906abe-77d9-0310-91a1-e0d9ade77398
96 lines
3.7 KiB
Python
96 lines
3.7 KiB
Python
#
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# Copyright (c) 2008 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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A loops-specific security policy. Intended mainly to deal with checking
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concept map parents in addition to containers for collecting principal roles.
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$Id$
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"""
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from zope.app.securitypolicy.interfaces import IPrincipalRoleMap
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from zope.app.securitypolicy.zopepolicy import ZopeSecurityPolicy
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from zope.app.securitypolicy.zopepolicy import SettingAsBoolean, globalRolesForPrincipal
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from zope import component
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from zope.component import adapts
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from zope.cachedescriptors.property import Lazy
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from zope.interface import classProvides
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from zope.security.interfaces import ISecurityPolicy
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from zope.security.proxy import removeSecurityProxy
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from loops.interfaces import IConcept, IResource
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class LoopsSecurityPolicy(ZopeSecurityPolicy):
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classProvides(ISecurityPolicy)
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def cached_principal_roles(self, obj, principal, checked=None):
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if checked is None:
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checked = []
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obj = removeSecurityProxy(obj)
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cache = self.cache(obj)
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try:
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cache_principal_roles = cache.principal_roles
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except AttributeError:
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cache_principal_roles = cache.principal_roles = {}
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try:
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return cache_principal_roles[principal]
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except KeyError:
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pass
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if obj is None:
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roles = dict([(role, SettingAsBoolean[setting])
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for (role, setting)
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in globalRolesForPrincipal(principal)])
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roles['zope.Anonymous'] = True # Everybody has Anonymous
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cache_principal_roles[principal] = roles
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return roles
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roles = {}
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for p in self.getParents(obj, checked):
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# TODO: care for correct combination if there is more than
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# one parent
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roles.update(self.cached_principal_roles(p, principal))
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prinrole = IPrincipalRoleMap(obj, None)
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if prinrole:
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roles = roles.copy()
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for role, setting in prinrole.getRolesForPrincipal(principal):
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roles[role] = SettingAsBoolean[setting]
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cache_principal_roles[principal] = roles
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#print '***', roles
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return roles
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def getParents(self, obj, checked):
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if obj in checked: # cycle - leave the concept map
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return [getattr(obj, '__parent__', None)]
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# keep concept parents in cache
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cache = self.cache(obj)
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try:
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parents = cache.parents
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except AttributeError:
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parents = []
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if IConcept.providedBy(obj):
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parents = [p for p in obj.getParents(noSecurityCheck=True)
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if p != obj]
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elif IResource.providedBy(obj):
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parents = [p for p in obj.getConcepts(noSecurityCheck=True)
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if p != obj]
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cache.parents = parents
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if not parents:
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parents = [getattr(obj, '__parent__', None)]
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checked.append(obj)
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return parents
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