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# Copyright (C) 2014 Ipsilon project Contributors, for license see COPYING
from ipsilon.login.common import LoginPageBase, LoginManagerBase, \
LoginManagerInstaller
from ipsilon.util.plugin import PluginObject
from ipsilon.util.user import UserSession
from string import Template
import cherrypy
import os
import logging
class GSSAPI(LoginPageBase):
def root(self, *args, **kwargs):
# Someone typed manually or a robot is walking th tree.
# Redirect to default page
return self.lm.redirect_to_path(self.lm.path)
class GSSAPIAuth(LoginPageBase):
def root(self, *args, **kwargs):
trans = self.get_valid_transaction('login', **kwargs)
# If we can get here, we must be authenticated and remote_user
# was set. Check the session has a user set already or error.
us = UserSession()
us.remote_login()
self.user = us.get_user()
if not self.user.is_anonymous:
principal = cherrypy.request.wsgi_environ.get('GSS_NAME', None)
if principal:
userdata = {'gssapi_principal_name': principal}
else:
userdata = {'gssapi_principal_name': self.user.name}
return self.lm.auth_successful(trans, self.user.name,
'gssapi', userdata)
else:
return self.lm.auth_failed(trans)
class GSSAPIError(LoginPageBase):
def root(self, *args, **kwargs):
cherrypy.log.error('REQUEST: %s' % cherrypy.request.headers,
severity=logging.DEBUG)
# If we have no negotiate header return whatever mod_auth_gssapi
# generated and wait for the next request
if 'WWW-Authenticate' not in cherrypy.request.headers:
cherrypy.response.status = 401
next_login = self.lm.next_login()
if next_login:
return next_login.page.root(*args, **kwargs)
conturl = '%s/login' % self.basepath
return self._template('login/gssapi.html',
title='GSSAPI Login',
cont=conturl)
# If we get here, negotiate failed
trans = self.get_valid_transaction('login', **kwargs)
return self.lm.auth_failed(trans)
class LoginManager(LoginManagerBase):
def __init__(self, *args, **kwargs):
super(LoginManager, self).__init__(*args, **kwargs)
self.name = 'gssapi'
self.path = 'gssapi/negotiate'
self.page = None
self.description = """
GSSAPI Negotiate authentication plugin. Relies on the mod_auth_gssapi
apache plugin for actual authentication. """
self.new_config(self.name)
def get_tree(self, site):
self.page = GSSAPI(site, self)
self.page.__dict__['negotiate'] = GSSAPIAuth(site, self)
self.page.__dict__['unauthorized'] = GSSAPIError(site, self)
self.page.__dict__['failed'] = GSSAPIError(site, self)
return self.page
CONF_TEMPLATE = """
<Location /${instance}/login/gssapi/negotiate>
AuthType GSSAPI
AuthName "GSSAPI Single Sign On Login"
$keytab
GssapiSSLonly $gssapisslonly
GssapiLocalName on
Require valid-user
ErrorDocument 401 /${instance}/login/gssapi/unauthorized
ErrorDocument 500 /${instance}/login/gssapi/failed
</Location>
"""
class Installer(LoginManagerInstaller):
def __init__(self, *pargs):
super(Installer, self).__init__()
self.name = 'gssapi'
self.pargs = pargs
def install_args(self, group):
group.add_argument('--gssapi', choices=['yes', 'no'], default='no',
help='Configure GSSAPI authentication')
group.add_argument('--gssapi-httpd-keytab',
default='/etc/httpd/conf/http.keytab',
help='Kerberos keytab location for HTTPD')
def configure(self, opts, changes):
if opts['gssapi'] != 'yes':
return
confopts = {'instance': opts['instance']}
if os.path.exists(opts['gssapi_httpd_keytab']):
confopts['keytab'] = 'GssapiCredStore keytab:%s' % (
opts['gssapi_httpd_keytab'])
else:
raise Exception('Keytab not found')
if opts['secure'] == 'no':
confopts['gssapisslonly'] = 'Off'
else:
confopts['gssapisslonly'] = 'On'
tmpl = Template(CONF_TEMPLATE)
hunk = tmpl.substitute(**confopts)
with open(opts['httpd_conf'], 'a') as httpd_conf:
httpd_conf.write(hunk)
# Add configuration data to database
po = PluginObject(*self.pargs)
po.name = 'gssapi'
po.wipe_data()
# Update global config, put 'gssapi' always first
ph = self.pargs[0]
ph.refresh_enabled()
if 'gssapi' not in ph.enabled:
enabled = []
enabled.extend(ph.enabled)
enabled.insert(0, 'gssapi')
ph.save_enabled(enabled)
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