ipsilon/login/authpam.py

   1 #!/usr/bin/python
   2 #
   3 # Copyright (C) 2013  Simo Sorce <simo@redhat.com>
   4 #
   5 # see file 'COPYING' for use and warranty information
   6 #
   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.
  11 #
  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.
  16 #
  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/>.
  19
  20 from ipsilon.login.common import LoginPageBase, LoginManagerBase
  21 from ipsilon.login.common import FACILITY
  22 from ipsilon.util.plugin import PluginObject
  23 import cherrypy
  24 import pam
  25 import subprocess
  26
  27
  28 class Pam(LoginPageBase):
  29
  30     def _authenticate(self, username, password):
  31         if self.lm.service_name:
  32             ok = pam.authenticate(username, password, self.lm.service_name)
  33         else:
  34             ok = pam.authenticate(username, password)
  35
  36         if ok:
  37             cherrypy.log("User %s successfully authenticated." % username)
  38             return username
  39
  40         cherrypy.log("User %s failed authentication." % username)
  41         return None
  42
  43     def GET(self, *args, **kwargs):
  44         context = self.create_tmpl_context()
  45         # pylint: disable=star-args
  46         return self._template('login/pam.html', **context)
  47
  48     def POST(self, *args, **kwargs):
  49         username = kwargs.get("login_name")
  50         password = kwargs.get("login_password")
  51         user = None
  52         error = None
  53
  54         if username and password:
  55             user = self._authenticate(username, password)
  56             if user:
  57                 return self.lm.auth_successful(user)
  58             else:
  59                 error = "Authentication failed"
  60                 cherrypy.log.error(error)
  61         else:
  62             error = "Username or password is missing"
  63             cherrypy.log.error("Error: " + error)
  64
  65         context = self.create_tmpl_context(
  66             username=username,
  67             error=error,
  68             error_password=not password,
  69             error_username=not username
  70         )
  71         # pylint: disable=star-args
  72         return self._template('login/pam.html', **context)
  73
  74     def root(self, *args, **kwargs):
  75         op = getattr(self, cherrypy.request.method, self.GET)
  76         if callable(op):
  77             return op(*args, **kwargs)
  78
  79     def create_tmpl_context(self, **kwargs):
  80         next_url = None
  81         if self.lm.next_login is not None:
  82             next_url = self.lm.next_login.path
  83
  84         context = {
  85             "title": 'Login',
  86             "action": '%s/login/pam' % self.basepath,
  87             "service_name": self.lm.service_name,
  88             "username_text": self.lm.username_text,
  89             "password_text": self.lm.password_text,
  90             "description": self.lm.help_text,
  91             "next_url": next_url,
  92         }
  93         context.update(kwargs)
  94         return context
  95
  96
  97 class LoginManager(LoginManagerBase):
  98
  99     def __init__(self, *args, **kwargs):
 100         super(LoginManager, self).__init__(*args, **kwargs)
 101         self.name = 'pam'
 102         self.path = 'pam'
 103         self.page = None
 104         self.description = """
 105 Form based login Manager that uses the system's PAM infrastructure
 106 for authentication. """
 107         self._options = {
 108             'service name': [
 109                 """ The name of the PAM service used to authenticate. """,
 110                 'string',
 111                 'remote'
 112             ],
 113             'help text': [
 114                 """ The text shown to guide the user at login time. """,
 115                 'string',
 116                 'Insert your Username and Password and then submit.'
 117             ],
 118             'username text': [
 119                 """ The text shown to ask for the username in the form. """,
 120                 'string',
 121                 'Username'
 122             ],
 123             'password text': [
 124                 """ The text shown to ask for the password in the form. """,
 125                 'string',
 126                 'Password'
 127             ],
 128         }
 129
 130     @property
 131     def service_name(self):
 132         return self.get_config_value('service name')
 133
 134     @property
 135     def help_text(self):
 136         return self.get_config_value('help text')
 137
 138     @property
 139     def username_text(self):
 140         return self.get_config_value('username text')
 141
 142     @property
 143     def password_text(self):
 144         return self.get_config_value('password text')
 145
 146     def get_tree(self, site):
 147         self.page = Pam(site, self)
 148         return self.page
 149
 150
 151 class Installer(object):
 152
 153     def __init__(self):
 154         self.name = 'pam'
 155         self.ptype = 'login'
 156
 157     def install_args(self, group):
 158         group.add_argument('--pam', choices=['yes', 'no'], default='no',
 159                            help='Configure PAM authentication')
 160         group.add_argument('--pam-service', action='store', default='remote',
 161                            help='PAM service name to use for authentication')
 162
 163     def configure(self, opts):
 164         if opts['pam'] != 'yes':
 165             return
 166
 167         # Add configuration data to database
 168         po = PluginObject()
 169         po.name = 'pam'
 170         po.wipe_data()
 171
 172         po.wipe_config_values(FACILITY)
 173         config = {'service name': opts['pam_service']}
 174         po.set_config(config)
 175         po.save_plugin_config(FACILITY)
 176
 177         # Update global config to add login plugin
 178         po = PluginObject()
 179         po.name = 'global'
 180         globalconf = po.get_plugin_config(FACILITY)
 181         if 'order' in globalconf:
 182             order = globalconf['order'].split(',')
 183         else:
 184             order = []
 185         order.append('pam')
 186         globalconf['order'] = ','.join(order)
 187         po.set_config(globalconf)
 188         po.save_plugin_config(FACILITY)
 189
 190         # for selinux enabled platfroms, ignore if it fails just report
 191         try:
 192             subprocess.call(['/usr/sbin/setsebool', '-P',
 193                              'httpd_mod_auth_pam=on',
 194                              'httpd_tmp_exec=on'])
 195         except Exception:  # pylint: disable=broad-except
 196             pass