1 # Copyright (C) 2014 Simo Sorce <simo@redhat.com>
3 # see file 'COPYING' for use and warranty information
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 from ipsilon.login.common import LoginPageBase, LoginManagerBase, \
20 from ipsilon.util.plugin import PluginObject
21 from ipsilon.util.user import UserSession
22 from string import Template
27 class Krb(LoginPageBase):
29 def root(self, *args, **kwargs):
30 # Someone typed manually or a robot is walking th tree.
31 # Redirect to default page
32 return self.lm.redirect_to_path(self.lm.path)
35 class KrbAuth(LoginPageBase):
37 def root(self, *args, **kwargs):
38 trans = self.get_valid_transaction('login', **kwargs)
39 # If we can get here, we must be authenticated and remote_user
40 # was set. Check the session has a user set already or error.
43 self.user = us.get_user()
44 if not self.user.is_anonymous:
45 userdata = {'krb_principal_name': self.user.name}
46 return self.lm.auth_successful(trans, self.user.name,
49 return self.lm.auth_failed(trans)
52 class KrbError(LoginPageBase):
54 def root(self, *args, **kwargs):
55 cherrypy.log.error('REQUEST: %s' % cherrypy.request.headers)
56 # If we have no negotiate header return whatever mod_auth_kerb
57 # generated and wait for the next request
59 if 'WWW-Authenticate' not in cherrypy.request.headers:
60 cherrypy.response.status = 401
62 next_login = self.lm.next_login()
64 return next_login.page.root(*args, **kwargs)
66 conturl = '%s/login' % self.basepath
67 return self._template('login/krb.html',
68 title='Kerberos Login',
71 # If we get here, negotiate failed
72 trans = self.get_valid_transaction('login', **kwargs)
73 return self.lm.auth_failed(trans)
76 class LoginManager(LoginManagerBase):
78 def __init__(self, *args, **kwargs):
79 super(LoginManager, self).__init__(*args, **kwargs)
81 self.path = 'krb/negotiate'
83 self.description = """
84 Kereros Negotiate authentication plugin. Relies on the mod_auth_kerb apache
85 plugin for actual authentication. """
86 self.new_config(self.name)
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(LoginManagerInstaller):
119 def __init__(self, *pargs):
120 super(Installer, self).__init__()
124 def install_args(self, group):
125 group.add_argument('--krb', choices=['yes', 'no'], default='no',
126 help='Configure Kerberos authentication')
127 group.add_argument('--krb-realms',
128 help='Allowed Kerberos Auth Realms')
129 group.add_argument('--krb-httpd-keytab',
130 default='/etc/httpd/conf/http.keytab',
131 help='Kerberos keytab location for HTTPD')
133 def configure(self, opts):
134 if opts['krb'] != 'yes':
137 confopts = {'instance': opts['instance']}
139 if os.path.exists(opts['krb_httpd_keytab']):
140 confopts['keytab'] = ' Krb5KeyTab %s' % opts['krb_httpd_keytab']
142 raise Exception('Keytab not found')
144 if opts['krb_realms'] is None:
145 confopts['realms'] = ' # KrbAuthRealms - Any realm is allowed'
147 confopts['realms'] = ' KrbAuthRealms %s' % opts['krb_realms']
149 tmpl = Template(CONF_TEMPLATE)
150 hunk = tmpl.substitute(**confopts) # pylint: disable=star-args
151 with open(opts['httpd_conf'], 'a') as httpd_conf:
152 httpd_conf.write(hunk)
154 # Add configuration data to database
155 po = PluginObject(*self.pargs)
159 # Update global config, put 'krb' always first
162 if 'krb' not in ph.enabled:
164 enabled.extend(ph.enabled)
165 enabled.insert(0, 'krb')
166 ph.save_enabled(enabled)