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A read-only Zope3 GroupFolder implementation that reflects groups on an LDAP server. Needs ldappas

Project Description

This is an AuthenticatorPlugin that implements a read-only GroupFolder reflecting the groups as defined on an LDAP server. It relies on the registration as a named ILDAPAuthentation utility of an ldappas plugin. It works in tandem with ldappas: ldappas authenticates users, while ldapgroups looks up their groups and adds the users to the groups


>>> from ldappas.authentication import LDAPAuthentication
>>> from zope import component
>>> from ldappas.interfaces import ILDAPAuthentication
>>> users = LDAPAuthentication()
>>> component.provideUtility(users, ILDAPAuthentication, 'ldap-users')

LDAPAuthentication needs an LDAP adapter, registered as a named ILDAPAdapter utility. There’s a fake one in the tests module.

>>> from ldapgroups.tests.fakeadapter import FakeLDAPAdapter
>>> adapter = FakeLDAPAdapter()
>>> from ldapadapter.interfaces import ILDAPAdapter
>>> component.provideUtility(adapter, ILDAPAdapter, 'ldap-adapter')

Let’s configure the LDAPAuthentication plugin:

>>> users.adapterName = u'ldap-adapter'
>>> users.searchBase = u'ou=users,dc=test'
>>> users.searchScope = u'sub'
>>> users.loginAttribute = u'cn'
>>> users.principalIdPrefix = u'ldap.'
>>> users.titleAttribute = u'sn'

There’s no need to fill in the group-related attributes on the LDAPAuthentication plugin, as LDAPGroups uses its own. For the idAttribute, you should use the attribute that yields the Distinguished Name of the user, as LDAP uses this to link users to groups:

>>> users.idAttribute = u'dn'

(For ActiveDirectory, this apparently is ‘distinguishedName’, so use an LDAP browser to check) There may be a way around this restriction with advanced queries, but is not (yet?) implemented.

Let’s get our LDAP GroupFolder up and running

>>> from ldapgroups.groupfolder import LDAPGroups
>>> groups = LDAPGroups(u'ldap-users', u'group.ldap.')
>>> groups.groupsSearchBase = u'ou=groups,dc=test'
>>> groups.groupsSearchScope = u'sub'
>>> groups.groupTitleAttribute = u'cn'
>>> groups.groupIdAttribute = u'dn'
>>> groups.groupDescriptionAttribute = u'description'

Do some registration tests

>>> groups.getLDAPAuthenticator() == users
>>> users.getLDAPAdapter() == adapter

Groups can’t authenticate

>>> groups.authenticateCredentials({'login':u'Domain Users','password':u'pwd'}) is None

We can lookup groups as principals

>>> principal = groups.principalInfo(u' Users,ou=groups,dc=test')
>>> principal
LDAPGroupInformation(u' Users,ou=groups,dc=test')
>>> from zope.pluggableauth.interfaces import IPrincipalInfo
>>> IPrincipalInfo.providedBy(principal)

It also provides IReadGroupInformation, which can be used to get the principals

>>> from ldapgroups.interfaces import IReadGroupInformation
>>> IReadGroupInformation.providedBy(principal)
>>> principal.principals
[u'\xe9 de Chimpansee,ou=users,dc=test', u' Kolibri,ou=users,dc=test']

Container behaviour

>>> len(groups)
>>> groups.keys()
[u'Administrators', u'Domain Users']
>>> 'Administrators' in groups
>>> groups.has_key('Administrators')
>>> groups.values()
[LDAPGroupInformation(u',ou=groups,dc=test'), LDAPGroupInformation(u' Users,ou=groups,dc=test')]
>>> groups.items() == zip(groups.keys(),  groups.values())
>>> group = groups['Domain Users']
>>> group
LDAPGroupInformation(u' Users,ou=groups,dc=test')
>>> group.description
u'Users with a domain account'
>>> group == groups.get('Domain Users')
>>> groups.get('grupo sportivo') is None
>>> groups['grupo sportivo'] # doctest: +ELLIPSIS
Traceback (most recent call last):


>>>{'cn':'Domain Users'})
[u' Users,ou=groups,dc=test']

PAU integration:

Registers them all to the PAU

>>> from zope.pluggableauth.interfaces import IAuthenticatorPlugin
>>> component.provideUtility(users, provides=IAuthenticatorPlugin, name='ldap-users')
>>> component.provideUtility(groups, provides=IAuthenticatorPlugin, name='ldap-groups')

We also need a credentials plugin that will extract the credentials from the request:

>>> import zope.interface
>>> from zope.pluggableauth.interfaces import ICredentialsPlugin
>>> class MyCredentialsPlugin:
...     zope.interface.implements(ICredentialsPlugin)
...     def extractCredentials(self, request):
...         return request.get('credentials')
...     def challenge(self, request):
...         pass # challenge is a no-op for this plugin
...     def logout(request):
...         pass # logout is a no-op for this plugin
>>> creds = MyCredentialsPlugin()
>>> component.provideUtility(creds, name='simple-creds')

Register the principalFactory

>>> import zope.component.event
>>> from zope.pluggableauth import factories
>>> component.provideAdapter(factories.AuthenticatedPrincipalFactory)
>>> component.provideAdapter(factories.FoundPrincipalFactory)

We are finally ready to create a pluggable authentication utility and register the two plugins with it:

>>> from zope.pluggableauth import PluggableAuthentication
>>> pau = PluggableAuthentication()
>>> pau['ldap-users'] = users
>>> pau['ldap-groups'] = groups
>>> pau['simple-creds'] = creds
>>> pau.credentialsPlugins = ('simple-creds', )
>>> pau.authenticatorPlugins = ('ldap-users', 'ldap-groups')

Let’s authenticate some users

>>> from zope.publisher.browser import TestRequest
>>> request = TestRequest(credentials={'login': 'Louis Kolibri', 'password': 'louis2000'})
>>> louis = pau.authenticate(request)
>>> louis
Principal(u' Kolibri,ou=users,dc=test')

Groups are set by the setGroupsForPrincipal event subscriber

>>> louis.groups
>>> class PrincipalCreatedEvent:
...     def __init__(self, authentication, principal):
...         self.authentication = authentication
...         self.principal = principal
>>> from ldapgroups.groupfolder import setGroupsForPrincipal
>>> setGroupsForPrincipal(PrincipalCreatedEvent(pau, louis))
>>> louis.groups
[u' Users,ou=groups,dc=test']
>>> component.provideHandler(setGroupsForPrincipal)
>>> request = TestRequest(credentials={'login': u'Andr\xe9 de Chimpansee', 'password': 'dreten'})
>>> andre = pau.authenticate(request)
>>> andre
Principal(u'\xe9 de Chimpansee,ou=users,dc=test')
>>> andre.groups
[u',ou=groups,dc=test', u' Users,ou=groups,dc=test']

Browser views

There’s an ISized adapter available for the zmi view.

>>> from ldapgroups.groupfolder import LDAPGroupSize
>>> from zope.size.interfaces import ISized
>>> component.provideAdapter(LDAPGroupSize)
>>> ISized(group).sizeForSorting()
('item', 2)

The view’s iteminfos function gathers all info about the goups in a groupfolder

>>> from ldapgroups.browser.contents import LDAPGroupFolderContents
>>> view = LDAPGroupFolderContents(groups, request)
>>> view.iteminfos()
[{'url': 'Administrators', 'name': u'Administrators', 'size': u'${items} items'}, {'url': 'Domain%20Users', 'name': u'Domain Users', 'size': u'${items} items'}]


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