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#!/usr/bin/python
#
# Copyright (C) 2013 Simo Sorce <simo@redhat.com>
#
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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 General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from ipsilon.util.page import Page
from ipsilon.util.user import UserSession
from ipsilon.util.plugin import PluginLoader, PluginObject
from ipsilon.util.plugin import PluginInstaller
import cherrypy
class LoginManagerBase(PluginObject):
def __init__(self):
super(LoginManagerBase, self).__init__()
self.path = '/'
self.next_login = None
def redirect_to_path(self, path):
base = cherrypy.config.get('base.mount', "")
raise cherrypy.HTTPRedirect('%s/login/%s' % (base, path))
def auth_successful(self, username, userdata=None):
# save ref before calling UserSession login() as it
# may regenerate the session
session = UserSession()
ref = session.get_data('login', 'Return')
if not ref:
ref = cherrypy.config.get('base.mount', "") + '/'
session.login(username)
# Save additional data provided by the login manager
if userdata:
for key in userdata:
session.save_data('user', key, userdata[key])
raise cherrypy.HTTPRedirect(ref)
def auth_failed(self):
# try with next module
if self.next_login:
return self.redirect_to_path(self.next_login.path)
# return to the caller if any
session = UserSession()
ref = session.get_data('login', 'Return')
# otherwise destroy session and return error
if not ref:
session.logout(None)
raise cherrypy.HTTPError(401)
raise cherrypy.HTTPRedirect(ref)
def _debug(self, fact):
if cherrypy.config.get('debug', False):
cherrypy.log(fact)
def get_tree(self, site):
raise NotImplementedError
def enable(self, site):
plugins = site[FACILITY]
if self in plugins['enabled']:
return
# configure self
if self.name in plugins['config']:
self.set_config(plugins['config'][self.name])
# and add self to the root
root = plugins['root']
root.add_subtree(self.name, self.get_tree(site))
# finally add self in login chain
prev_obj = None
for prev_obj in plugins['enabled']:
if prev_obj.next_login:
break
if prev_obj:
while prev_obj.next_login:
prev_obj = prev_obj.next_login
prev_obj.next_login = self
if not root.first_login:
root.first_login = self
plugins['enabled'].append(self)
self._debug('Login plugin enabled: %s' % self.name)
def disable(self, site):
plugins = site[FACILITY]
if self not in plugins['enabled']:
return
# remove self from chain
root = plugins['root']
if root.first_login == self:
root.first_login = self.next_login
elif root.first_login:
prev_obj = root.first_login
while prev_obj.next_login != self:
prev_obj = prev_obj.next_login
if prev_obj:
prev_obj.next_login = self.next_login
self.next_login = None
plugins['enabled'].remove(self)
self._debug('Login plugin disabled: %s' % self.name)
class LoginPageBase(Page):
def __init__(self, site, mgr):
super(LoginPageBase, self).__init__(site)
self.lm = mgr
def root(self, *args, **kwargs):
raise cherrypy.HTTPError(500)
FACILITY = 'login_config'
class Login(Page):
def __init__(self, *args, **kwargs):
super(Login, self).__init__(*args, **kwargs)
self.first_login = None
loader = PluginLoader(Login, FACILITY, 'LoginManager')
self._site[FACILITY] = loader.get_plugin_data()
plugins = self._site[FACILITY]
available = plugins['available'].keys()
self._debug('Available login managers: %s' % str(available))
plugins['root'] = self
for item in plugins['whitelist']:
self._debug('Login plugin in whitelist: %s' % item)
if item not in plugins['available']:
continue
plugins['available'][item].enable(self._site)
def add_subtree(self, name, page):
self.__dict__[name] = page
def root(self, *args, **kwargs):
if self.first_login:
raise cherrypy.HTTPRedirect('%s/login/%s' %
(self.basepath,
self.first_login.path))
return self._template('login/index.html', title='Login')
class Logout(Page):
def root(self, *args, **kwargs):
UserSession().logout(self.user)
return self._template('logout.html', title='Logout')
class LoginMgrsInstall(object):
def __init__(self):
pi = PluginInstaller(LoginMgrsInstall)
self.plugins = pi.get_plugins()
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