+import logging
+from lxml import etree
+from urllib import urlencode
+import urllib2
+import urlparse
from django.conf import settings
from django.contrib.auth import login as auth_login, logout as auth_logout
from django.core.urlresolvers import get_callable
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render_to_response
from django.template import RequestContext
+from cas_provider.attribute_formatters import NSMAP, CAS
+from cas_provider.models import ProxyGrantingTicket, ProxyTicket
from forms import LoginForm
from models import ServiceTicket, LoginTicket
__all__ = ['login', 'validate', 'logout', 'service_validate']
-
INVALID_TICKET = 'INVALID_TICKET'
INVALID_SERVICE = 'INVALID_SERVICE'
INVALID_REQUEST = 'INVALID_REQUEST'
(INVALID_SERVICE, u'Service is invalid'),
(INVALID_REQUEST, u'Not all required parameters were sent.'),
(INTERNAL_ERROR, u'An internal error occurred during ticket validation'),
-)
+ )
+
+logger = logging.getLogger(__name__)
-def login(request, template_name='cas/login.html', \
- success_redirect=settings.LOGIN_REDIRECT_URL,
- warn_template_name='cas/warn.html',
- form_class=LoginForm):
+def login(request, template_name='cas/login.html',\
+ success_redirect=settings.LOGIN_REDIRECT_URL,
+ warn_template_name='cas/warn.html',
+ form_class=LoginForm):
service = request.GET.get('service', None)
if request.user.is_authenticated():
if service is not None:
return render_to_response(template_name, {
'form': form,
'errors': form.get_errors() if hasattr(form, 'get_errors') else None,
- }, context_instance=RequestContext(request))
+ }, context_instance=RequestContext(request))
def validate(request):
ticket = ServiceTicket.objects.get(ticket=ticket_string)
assert ticket.service == service
username = ticket.user.username
- ticket.delete()
return HttpResponse("yes\n%s\n" % username)
except:
pass
return HttpResponse("no\n\n")
-def logout(request, template_name='cas/logout.html', \
- auto_redirect=settings.CAS_AUTO_REDIRECT_AFTER_LOGOUT):
+def logout(request, template_name='cas/logout.html',
+ auto_redirect=settings.CAS_AUTO_REDIRECT_AFTER_LOGOUT):
url = request.GET.get('url', None)
if request.user.is_authenticated():
+ for ticket in ServiceTicket.objects.filter(user=request.user):
+ ticket.delete()
auth_logout(request)
if url and auto_redirect:
return HttpResponseRedirect(url)
- return render_to_response(template_name, {'url': url}, \
- context_instance=RequestContext(request))
+ return render_to_response(template_name, {'url': url},
+ context_instance=RequestContext(request))
-def service_validate(request):
- """Validate ticket via CAS v.2 protocol"""
- service = request.GET.get('service', None)
- ticket_string = request.GET.get('ticket', None)
+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.serviceTicket.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:
- ticket = ServiceTicket.objects.get(ticket=ticket_string)
+ 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)
- if ticket.service != service:
- ticket.delete()
+ ticketUrl = urlparse.urlparse(ticket.service)
+ serviceUrl = urlparse.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
+
+ if hasattr(ticket, 'proxyticket'):
+ pgt = ticket.proxyticket.proxyGrantingTicket
+ # I am issued by this proxy granting ticket
+ if hasattr(pgt.serviceTicket, 'proxyticket'):
+ while pgt:
+ if hasattr(pgt.serviceTicket, 'proxyticket'):
+ proxies += (pgt.serviceTicket.service,)
+ pgt = pgt.serviceTicket.proxyticket.proxyGrantingTicket
+ else:
+ pgt = None
+
user = ticket.user
- ticket.delete()
- return _cas2_sucess_response(user)
+ return _cas2_sucess_response(user, pgtIouId, proxies)
+
+
+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)
-def _cas2_error_response(code):
- return HttpResponse(u''''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
+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(urlparse.urlsplit(pgt_url))
+
+ pgt = ProxyGrantingTicket()
+ pgt.serviceTicket = ticket
+ pgt.targetService = pgt_url
+
+ if hasattr(ticket, 'proxyGrantingTicket'):
+ # here we got a proxy ticket! tata!
+ pgt.pgt = ticket.proxyGrantingTicket
+
+ params = {'pgtId': pgt.ticket, 'pgtIou': pgt.pgtiou}
+
+ query = dict(urlparse.parse_qsl(uri[4]))
+ query.update(params)
+
+ uri[3] = urlencode(query)
+
+ try:
+ response = urllib2.urlopen(urlparse.urlunsplit(uri))
+ except urllib2.HTTPError, e:
+ if not e.code in proxy_callback_good_status:
+ logger.debug('Checking Proxy Callback URL {} returned {}. Not issuing PGT.'.format(uri, e.code))
+ return
+ except urllib2.URLError, e:
+ logger.debug('Checking Proxy Callback URL {} 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), mimetype='text/xml')
+
+
+def _cas2_error_response(code, message=None):
+ return HttpResponse(u'''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
<cas:authenticationFailure code="%(code)s">
%(message)s
</cas:authenticationFailure>
</cas:serviceResponse>''' % {
- 'code': code,
- 'message': dict(ERROR_MESSAGES).get(code)
+ 'code': code,
+ 'message': message if message else dict(ERROR_MESSAGES).get(code)
}, mimetype='text/xml')
-def _cas2_sucess_response(user):
- return HttpResponse(auth_success_response(user), mimetype='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 unicode(etree.tostring(response, encoding='utf-8'), 'utf-8')
-def auth_success_response(user):
- from attribute_formatters import CAS, NSMAP, etree
+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')
if len(attrs) > 0:
formater = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_FORMATER)
formater(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 unicode(etree.tostring(response, encoding='utf-8'), 'utf-8')
fnp / django-cas-provider.git / blobdiff