cas_provider/models.py

   1 from __future__ import unicode_literals
   2
   3 from django.conf import settings
   4 from django.db import models
   5 from django.utils.translation import ugettext_lazy as _
   6 from random import Random
   7 import string
   8 try:
   9     from urllib.parse import urlencode, urlparse, parse_qs, ParseResult
  10 except ImportError:
  11     from urllib import urlencode
  12     from urlparse import urlparse, ParseResult
  13     from urlparse import parse_qs
  14
  15 __all__ = ['ServiceTicket', 'LoginTicket', 'ProxyGrantingTicket', 'ProxyTicket', 'ProxyGrantingTicketIOU']
  16
  17 class BaseTicket(models.Model):
  18     ticket = models.CharField(_('ticket'), max_length=32)
  19     created = models.DateTimeField(_('created'), auto_now=True)
  20
  21     class Meta:
  22         abstract = True
  23
  24     def __init__(self, *args, **kwargs):
  25         if 'ticket' not in kwargs:
  26             kwargs['ticket'] = self._generate_ticket()
  27         super(BaseTicket, self).__init__(*args, **kwargs)
  28
  29     def __unicode__(self):
  30         return self.ticket
  31
  32     def _generate_ticket(self, length=ticket.max_length, chars=string.ascii_letters + string.digits):
  33         """ Generates a random string of the requested length. Used for creation of tickets. """
  34         return "%s-%s" % (self.prefix, ''.join(Random().sample(chars, length - (len(self.prefix) + 1))))
  35
  36
  37 class ServiceTicket(BaseTicket):
  38     user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_('user'), on_delete=models.CASCADE)
  39     service = models.URLField(_('service'))
  40
  41     prefix = 'ST'
  42
  43     class Meta:
  44         verbose_name = _('Service Ticket')
  45         verbose_name_plural = _('Service Tickets')
  46
  47     def get_redirect_url(self):
  48         parsed = urlparse(self.service)
  49         query = parse_qs(parsed.query)
  50         query['ticket'] = [self.ticket]
  51         query = [((k, v) if len(v) > 1 else (k, v[0])) for k, v in query.items()]
  52         parsed = ParseResult(parsed.scheme, parsed.netloc,
  53                                       parsed.path, parsed.params,
  54                                       urlencode(query), parsed.fragment)
  55         return parsed.geturl()
  56
  57
  58 class LoginTicket(BaseTicket):
  59     prefix = 'LT'
  60
  61     class Meta:
  62         verbose_name = _('Login Ticket')
  63         verbose_name_plural = _('Login Tickets')
  64
  65
  66 class ProxyGrantingTicket(BaseTicket):
  67     user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_('user'), on_delete=models.CASCADE)
  68     service = models.URLField(_('service'), null=True)
  69     pgt = models.ForeignKey('self', null=True, on_delete=models.CASCADE)
  70     pgtiou = models.CharField(max_length=256, verbose_name=_('PGTiou'))
  71     prefix = 'PGT'
  72
  73     def __init__(self, *args, **kwargs):
  74         if 'pgtiou' not in kwargs:
  75             kwargs['pgtiou'] = "PGTIOU-%s" % (''.join(Random().sample(string.ascii_letters + string.digits, 50)))
  76         super(ProxyGrantingTicket, self).__init__(*args, **kwargs)
  77
  78     class Meta:
  79         verbose_name = _('Proxy Granting Ticket')
  80         verbose_name_plural = _('Proxy Granting Tickets')
  81
  82
  83 class ProxyTicket(ServiceTicket):
  84     proxyGrantingTicket = models.ForeignKey(ProxyGrantingTicket, verbose_name=_('Proxy Granting Ticket'), on_delete=models.CASCADE)
  85
  86     prefix = 'PT'
  87
  88     class Meta:
  89         verbose_name = _('Proxy Ticket')
  90         verbose_name_plural = _('Proxy Tickets')
  91
  92
  93 class ProxyGrantingTicketIOU(BaseTicket):
  94     proxyGrantingTicket = models.ForeignKey(ProxyGrantingTicket, verbose_name=_('Proxy Granting Ticket'), on_delete=models.CASCADE)
  95
  96     prefix = 'PGTIOU'
  97
  98     class Meta:
  99         verbose_name = _('Proxy Granting Ticket IOU')
 100         verbose_name_plural = _('Proxy Granting Tickets IOU')
 101