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 import cherrypy
  22 import pam
  23
  24
  25 class Pam(LoginPageBase):
  26
  27     def _authenticate(self, username, password):
  28         if self.lm.service_name:
  29             ok = pam.authenticate(username, password, self.lm.service_name)
  30         else:
  31             ok = pam.authenticate(username, password)
  32
  33         if ok:
  34             cherrypy.log("User %s successfully authenticated." % username)
  35             return username
  36
  37         cherrypy.log("User %s failed authentication." % username)
  38         return None
  39
  40     def GET(self, *args, **kwargs):
  41         context = self.create_tmpl_context()
  42         # pylint: disable=star-args
  43         return self._template('login/pam.html', **context)
  44
  45     def POST(self, *args, **kwargs):
  46         username = kwargs.get("login_name")
  47         password = kwargs.get("login_password")
  48         user = None
  49         error = None
  50
  51         if username and password:
  52             user = self._authenticate(username, password)
  53             if user:
  54                 return self.lm.auth_successful(user)
  55             else:
  56                 error = "Authentication failed"
  57                 cherrypy.log.error(error)
  58         else:
  59             error = "Username or password is missing"
  60             cherrypy.log.error("Error: " + error)
  61
  62         context = self.create_tmpl_context(
  63             username=username,
  64             error=error,
  65             error_password=not password,
  66             error_username=not username
  67         )
  68         # pylint: disable=star-args
  69         return self._template('login/pam.html', **context)
  70
  71     def root(self, *args, **kwargs):
  72         op = getattr(self, cherrypy.request.method, self.GET)
  73         if callable(op):
  74             return op(*args, **kwargs)
  75
  76     def create_tmpl_context(self, **kwargs):
  77         next_url = None
  78         if self.lm.next_login is not None:
  79             next_url = self.lm.next_login.path
  80
  81         context = {
  82             "title": 'Login',
  83             "action": '%s/login/pam' % self.basepath,
  84             "service_name": self.lm.service_name,
  85             "username_text": self.lm.username_text,
  86             "password_text": self.lm.password_text,
  87             "description": self.lm.help_text,
  88             "next_url": next_url,
  89         }
  90         context.update(kwargs)
  91         return context
  92
  93
  94 class LoginManager(LoginManagerBase):
  95
  96     def __init__(self, *args, **kwargs):
  97         super(LoginManager, self).__init__(*args, **kwargs)
  98         self.name = 'pam'
  99         self.path = 'pam'
 100         self.page = None
 101         self.description = """
 102 Form based login Manager that uses the system's PAM infrastructure
 103 for authentication. """
 104         self._options = {
 105             'service name': [
 106                 """ The name of the PAM service used to authenticate. """,
 107                 'string',
 108                 'remote'
 109             ],
 110             'help text': [
 111                 """ The text shown to guide the user at login time. """,
 112                 'string',
 113                 'Insert your Username and Password and then submit.'
 114             ],
 115             'username text': [
 116                 """ The text shown to ask for the username in the form. """,
 117                 'string',
 118                 'Username'
 119             ],
 120             'password text': [
 121                 """ The text shown to ask for the password in the form. """,
 122                 'string',
 123                 'Password'
 124             ],
 125         }
 126
 127     @property
 128     def service_name(self):
 129         return self.get_config_value('service name')
 130
 131     @property
 132     def help_text(self):
 133         return self.get_config_value('help text')
 134
 135     @property
 136     def username_text(self):
 137         return self.get_config_value('username text')
 138
 139     @property
 140     def password_text(self):
 141         return self.get_config_value('password text')
 142
 143     def get_tree(self, site):
 144         self.page = Pam(site, self)
 145         return self.page