+ return render_to_response(template_name, {'url': url},
+ context_instance=RequestContext(request))
+
+
+@never_cache
+def proxy(request):
+ targetService = request.GET['targetService']
+ pgt_id = request.GET['pgt']
+
+ try:
+ proxyGrantingTicket = ProxyGrantingTicket.objects.get(ticket=pgt_id)
+ except ProxyGrantingTicket.DoesNotExist:
+ return _cas2_error_response(INVALID_TICKET)
+
+ pt = ProxyTicket.objects.create(proxyGrantingTicket=proxyGrantingTicket,
+ user=proxyGrantingTicket.user,
+ service=targetService)
+ return _cas2_proxy_success(pt.ticket)
+
+
+def ticket_validate(service, ticket_string, pgtUrl):
+ if service is None or ticket_string is None:
+ return _cas2_error_response(INVALID_REQUEST)
+
+ try:
+ if ticket_string.startswith('ST'):
+ ticket = ServiceTicket.objects.get(ticket=ticket_string)
+ elif ticket_string.startswith('PT'):
+ ticket = ProxyTicket.objects.get(ticket=ticket_string)
+ else:
+ return _cas2_error_response(INVALID_TICKET,
+ '%(ticket)s is neither Service (ST-...) nor Proxy Ticket (PT-...)' % {
+ 'ticket': ticket_string})
+ except ServiceTicket.DoesNotExist:
+ return _cas2_error_response(INVALID_TICKET)
+
+ ticketUrl = urlparse(ticket.service)
+ serviceUrl = urlparse(service)
+
+ if not(ticketUrl.hostname == serviceUrl.hostname and ticketUrl.path == serviceUrl.path and ticketUrl.port == serviceUrl.port):
+ return _cas2_error_response(INVALID_SERVICE)
+
+ pgtIouId = None
+ proxies = ()
+ if pgtUrl is not None:
+ pgt = generate_proxy_granting_ticket(pgtUrl, ticket)
+ if pgt:
+ pgtIouId = pgt.pgtiou
+
+ try:
+ proxyTicket = ticket.proxyticket
+ except ProxyTicket.DoesNotExist:
+ pass
+ else:
+ pgt = proxyTicket.proxyGrantingTicket
+ # I am issued by this proxy granting ticket
+ while pgt.pgt is not None:
+ proxies += (pgt.service,)
+ pgt = pgt.pgt
+
+ user = ticket.user
+ ticket.delete()
+ return _cas2_sucess_response(user, pgtIouId, proxies)
+
+
+@never_cache
+def service_validate(request):
+ """Validate ticket via CAS v.2 protocol"""
+ service = request.GET.get('service', None)
+ ticket_string = request.GET.get('ticket', None)
+ pgtUrl = request.GET.get('pgtUrl', None)
+ if ticket_string.startswith('PT-'):
+ return _cas2_error_response(INVALID_TICKET, "serviceValidate cannot verify proxy tickets")
+ else:
+ return ticket_validate(service, ticket_string, pgtUrl)
+
+
+@never_cache
+def proxy_validate(request):
+ """Validate ticket via CAS v.2 protocol"""
+ service = request.GET.get('service', None)
+ ticket_string = request.GET.get('ticket', None)
+ pgtUrl = request.GET.get('pgtUrl', None)
+ return ticket_validate(service, ticket_string, pgtUrl)
+
+
+def generate_proxy_granting_ticket(pgt_url, ticket):
+ proxy_callback_good_status = (200, 202, 301, 302, 304)
+ uri = list(urlsplit(pgt_url))
+
+ pgt = ProxyGrantingTicket()
+ pgt.user = ticket.user
+ pgt.service = ticket.service
+ # Remember if it's a chained PGT.
+ pgt.pgt = getattr(ticket, 'proxyGrantingTicket', None)
+
+ params = {'pgtId': pgt.ticket, 'pgtIou': pgt.pgtiou}
+
+ query = dict(parse_qsl(uri[4]))
+ query.update(params)
+
+ uri[3] = urlencode(query)
+
+ try:
+ urlopen(urlunsplit(uri))
+ except HTTPError as e:
+ if not e.code in proxy_callback_good_status:
+ logger.debug('Checking Proxy Callback URL {0} returned {1}. Not issuing PGT.'.format(uri, e.code))
+ return
+ except URLError as e:
+ logger.debug('Checking Proxy Callback URL {0} raised URLError. Not issuing PGT.'.format(uri))
+ return
+
+ pgt.save()
+ return pgt
+
+
+def _cas2_proxy_success(pt):
+ return HttpResponse(proxy_success(pt))
+
+
+def _cas2_sucess_response(user, pgt=None, proxies=None):
+ return HttpResponse(auth_success_response(user, pgt, proxies), content_type='text/xml')
+
+
+def _cas2_error_response(code, message=None):
+ return HttpResponse('''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
+ <cas:authenticationFailure code="%(code)s">
+ %(message)s
+ </cas:authenticationFailure>
+ </cas:serviceResponse>''' % {
+ 'code': code,
+ 'message': message if message else dict(ERROR_MESSAGES).get(code)
+ }, content_type='text/xml')
+
+
+def proxy_success(pt):
+ response = etree.Element(CAS + 'serviceResponse', nsmap=NSMAP)
+ proxySuccess = etree.SubElement(response, CAS + 'proxySuccess')
+ proxyTicket = etree.SubElement(proxySuccess, CAS + 'proxyTicket')
+ proxyTicket.text = pt
+ return etree.tostring(response, encoding='unicode')
+
+
+def auth_success_response(user, pgt, proxies):
+ response = etree.Element(CAS + 'serviceResponse', nsmap=NSMAP)
+ auth_success = etree.SubElement(response, CAS + 'authenticationSuccess')
+ username = etree.SubElement(auth_success, CAS + 'user')
+ username.text = user.username
+
+ attrs = {}
+ for receiver, custom in signals.cas_collect_custom_attributes.send(sender=auth_success_response, user=user):
+ if custom:
+ attrs.update(custom)
+
+ identifiers = [i for sr, rr in signals.on_cas_collect_histories.send(sender=validate, for_user=user)
+ for i in rr]
+
+ if identifiers:
+ # Singular `identifier`, as that is the name of the element tag(s).
+ attrs['identifier'] = identifiers
+
+ if attrs:
+ formatter = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_FORMATER)
+ formatter(auth_success, attrs)
+
+ if pgt:
+ pgtElement = etree.SubElement(auth_success, CAS + 'proxyGrantingTicket')
+ pgtElement.text = pgt
+
+ if proxies:
+ proxiesElement = etree.SubElement(auth_success, CAS + "proxies")
+ for proxy in proxies:
+ proxyElement = etree.SubElement(proxiesElement, CAS + "proxy")
+ proxyElement.text = proxy
+
+ return etree.tostring(response, encoding='unicode')
fnp / django-cas-provider.git / blobdiff