3 # Copyright (C) 2014 Simo Sorce <simo@redhat.com>
5 # see file 'COPYING' for use and warranty information
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 from ipsilon.login.common import LoginPageBase, LoginManagerBase
21 from ipsilon.login.common import FACILITY
22 from ipsilon.util.plugin import PluginObject
23 from ipsilon.util.user import UserSession
24 from string import Template
29 class Krb(LoginPageBase):
31 def root(self, *args, **kwargs):
32 # Someone typed manually or a robot is walking th tree.
33 # Redirect to default page
34 return self.lm.redirect_to_path(self.lm.path)
37 class KrbAuth(LoginPageBase):
39 def root(self, *args, **kwargs):
40 trans = self.get_valid_transaction('login', **kwargs)
41 # If we can get here, we must be authenticated and remote_user
42 # was set. Check the session has a user set already or error.
45 self.user = us.get_user()
46 if not self.user.is_anonymous:
47 userdata = {'krb_principal_name': self.user.name}
48 return self.lm.auth_successful(trans, self.user.name,
51 return self.lm.auth_failed(trans)
54 class KrbError(LoginPageBase):
56 def root(self, *args, **kwargs):
57 cherrypy.log.error('REQUEST: %s' % cherrypy.request.headers)
58 # If we have no negotiate header return whatever mod_auth_kerb
59 # generated and wait for the next request
61 if 'WWW-Authenticate' not in cherrypy.request.headers:
62 cherrypy.response.status = 401
64 if self.lm.next_login:
65 return self.lm.next_login.page.root(*args, **kwargs)
67 conturl = '%s/login' % self.basepath
68 return self._template('login/krb.html',
69 title='Kerberos Login',
72 # If we get here, negotiate failed
73 trans = self.get_valid_transaction('login', **kwargs)
74 return self.lm.auth_failed(trans)
77 class LoginManager(LoginManagerBase):
79 def __init__(self, *args, **kwargs):
80 super(LoginManager, self).__init__(*args, **kwargs)
82 self.path = 'krb/negotiate'
84 self.description = """
85 Kereros Negotiate authentication plugin. Relies on the mod_auth_kerb apache
86 plugin for actual authentication. """
88 def get_tree(self, site):
89 self.page = Krb(site, self)
90 self.page.__dict__['negotiate'] = KrbAuth(site, self)
91 self.page.__dict__['unauthorized'] = KrbError(site, self)
92 self.page.__dict__['failed'] = KrbError(site, self)
98 <Location /${instance}/login/krb/negotiate>
100 AuthName "Kerberos Login"
101 KrbMethodNegotiate on
102 KrbMethodK5Passwd off
106 KrbSaveCredentials off
107 KrbConstrainedDelegation off
108 # KrbLocalUserMapping On
111 ErrorDocument 401 /${instance}/login/krb/unauthorized
112 ErrorDocument 500 /${instance}/login/krb/failed
117 class Installer(object):
123 def install_args(self, group):
124 group.add_argument('--krb', choices=['yes', 'no'], default='no',
125 help='Configure Kerberos authentication')
126 group.add_argument('--krb-realms',
127 help='Allowed Kerberos Auth Realms')
128 group.add_argument('--krb-httpd-keytab',
129 default='/etc/httpd/conf/http.keytab',
130 help='Kerberos keytab location for HTTPD')
132 def configure(self, opts):
133 if opts['krb'] != 'yes':
136 confopts = {'instance': opts['instance']}
138 if os.path.exists(opts['krb_httpd_keytab']):
139 confopts['keytab'] = ' Krb5KeyTab %s' % opts['krb_httpd_keytab']
141 raise Exception('Keytab not found')
143 if opts['krb_realms'] is None:
144 confopts['realms'] = ' # KrbAuthRealms - Any realm is allowed'
146 confopts['realms'] = ' KrbAuthRealms %s' % opts['krb_realms']
148 tmpl = Template(CONF_TEMPLATE)
149 hunk = tmpl.substitute(**confopts) # pylint: disable=star-args
150 with open(opts['httpd_conf'], 'a') as httpd_conf:
151 httpd_conf.write(hunk)
153 # Add configuration data to database
158 # Update global config, put 'krb' always first
160 globalconf = po.get_plugin_config(FACILITY)
161 if 'order' in globalconf:
162 order = globalconf['order'].split(',')
165 order.insert(0, 'krb')
166 globalconf['order'] = ','.join(order)
167 po.save_plugin_config(FACILITY, globalconf)