import logging
-from lxml import etree
+logger = logging.getLogger('cas_provider.views')
+import urllib
+
++import logging
+ from urllib import urlencode
+ import urllib2
+ import urlparse
++
+from django.http import HttpResponse, HttpResponseRedirect
+ 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 django.contrib.auth import login as auth_login, logout as auth_logout
+from django.contrib.auth import authenticate
- from forms import LoginForm, MergeLoginForm
- from models import ServiceTicket
- from utils import create_service_ticket
- from exceptions import SameEmailMismatchedPasswords
+from django.core.urlresolvers import reverse
+
-from forms import LoginForm
-from models import ServiceTicket, LoginTicket
++from lxml import etree
+ from cas_provider.attribute_formatters import NSMAP, CAS
+ from cas_provider.models import ProxyGrantingTicket, ProxyTicket
++from cas_provider.models import ServiceTicket
+
++from cas_provider.exceptions import SameEmailMismatchedPasswords
++from cas_provider.forms import LoginForm, MergeLoginForm
+
+from . import signals
- __all__ = ['login', 'validate', 'logout']
+ __all__ = ['login', 'validate', 'logout', 'service_validate']
+ INVALID_TICKET = 'INVALID_TICKET'
+ INVALID_SERVICE = 'INVALID_SERVICE'
+ INVALID_REQUEST = 'INVALID_REQUEST'
+ INTERNAL_ERROR = 'INTERNAL_ERROR'
+
+ ERROR_MESSAGES = (
+ (INVALID_TICKET, u'The provided ticket is invalid.'),
+ (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'),
+ )
- def _build_service_url(service, ticket):
- if service.find('?') == -1:
- return service + '?ticket=' + ticket
- else:
- return service + '&ticket=' + ticket
+ logger = logging.getLogger(__name__)
- def login(request, template_name='cas/login.html', success_redirect='/account/', **kwargs):
-def login(request, template_name='cas/login.html',\
++
++def login(request, template_name='cas/login.html',
+ success_redirect=settings.LOGIN_REDIRECT_URL,
- warn_template_name='cas/warn.html',
- form_class=LoginForm):
++ warn_template_name='cas/warn.html', **kwargs):
+ merge = kwargs.get('merge', False)
+ logging.debug('CAS Provider Login view. Method is %s, merge is %s, template is %s.',
+ request.method, merge, template_name)
+
service = request.GET.get('service', None)
- if request.user.is_authenticated():
- if service is not None:
- if request.GET.get('warn', False):
- return render_to_response(warn_template_name, {
- 'service': service,
- 'warn': False
- }, context_instance=RequestContext(request))
- ticket = ServiceTicket.objects.create(service=service, user=request.user)
- return HttpResponseRedirect(ticket.get_redirect_url())
- else:
- return HttpResponseRedirect(success_redirect)
+ if service is not None:
+ # Save the service on the session, for later use if we end up
+ # in one of the more complicated workflows.
+ request.session['service'] = service
+
+ user = request.user
+
+ errors = []
+
if request.method == 'POST':
- form = form_class(data=request.POST, request=request)
+ if merge:
+ form = MergeLoginForm(request.POST, request=request)
+ else:
+ form = LoginForm(request.POST, request=request)
+
if form.is_valid():
- user = form.get_user()
- auth_login(request, user)
- service = form.cleaned_data.get('service')
- if service is not None:
+ service = form.cleaned_data.get('service', None)
+ try:
+ auth_args = dict(username=form.cleaned_data['email'],
+ password=form.cleaned_data['password'])
+ if merge:
+ # We only want to send the merge argument if it's
+ # True. If it it's False, we want it to propagate
+ # through the auth backends properly.
+ auth_args['merge'] = merge
+ user = authenticate(**auth_args)
+ except SameEmailMismatchedPasswords:
+ # Need to merge the accounts?
+ if merge:
+ # We shouldn't get here...
+ raise
+ else:
+ base_url = reverse('cas_provider_merge')
+ args = dict(
+ success_redirect=success_redirect,
+ email=form.cleaned_data['email'],
+ )
+ if service is not None:
+ args['service'] = service
+ args = urllib.urlencode(args)
+
+ url = '%s?%s' % (base_url, args)
+ logging.debug('Redirecting to %s', url)
+ return HttpResponseRedirect(url)
+
+ if user is None:
+ errors.append('Incorrect username and/or password.')
+ else:
+ if user.is_active:
+ auth_login(request, user)
+
+ else: # Not a POST...
+ if merge:
+ form = MergeLoginForm(initial={'service': service, 'email': request.GET.get('email')})
+ else:
+ form = LoginForm(initial={'service': service})
+
+ if user is not None and user.is_authenticated():
+ # We have an authenticated user.
+ if not user.is_active:
+ errors.append('This account is disabled.')
+ else:
+ # Send the on_cas_login signal. If we get an HttpResponse, return that.
+ for receiver, response in signals.on_cas_login.send(sender=login, request=request, **kwargs):
+ if isinstance(response, HttpResponse):
+ return response
+
+ if service is None:
+ # Try and pull the service off the session
+ service = request.session.pop('service', service)
+
+ if service is None:
+ # Normal internal success redirection.
+ logging.debug('Redirecting to %s', success_redirect)
+ return HttpResponseRedirect(success_redirect)
+ else:
++ if request.GET.get('warn', False):
++ return render_to_response(warn_template_name, {
++ 'service': service,
++ 'warn': False
++ }, context_instance=RequestContext(request))
++
+ # Create a service ticket and redirect to the service.
- ticket = create_service_ticket(request.user, service)
+ ticket = ServiceTicket.objects.create(service=service, user=user)
- success_redirect = ticket.get_redirect_url()
- return HttpResponseRedirect(success_redirect)
- else:
- form = form_class(request=request, initial={
- 'service': service,
- 'lt': LoginTicket.objects.create()
- })
- if hasattr(request, 'session') and hasattr(request.session, 'set_test_cookie'):
- request.session.set_test_cookie()
- return render_to_response(template_name, {
- 'form': form,
- 'errors': form.get_errors() if hasattr(form, 'get_errors') else None,
- }, context_instance=RequestContext(request))
+ if 'service' in request.session:
+ # Don't need this any more.
+ del request.session['service']
+
- url = _build_service_url(service, ticket.ticket)
++ url = ticket.get_redirect_url()
+ logging.debug('Redirecting to %s', url)
+ return HttpResponseRedirect(url)
+
+ logging.debug('Rendering response on %s, merge is %s', template_name, merge)
+ return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request))
def validate(request):
- """Validate ticket via CAS v.1 protocol"""
++ """Validate ticket via CAS v.1 protocol
++ """
service = request.GET.get('service', None)
ticket_string = request.GET.get('ticket', None)
+ logger.info('Validating ticket %s for %s', ticket_string, service)
if service is not None and ticket_string is not None:
+ #renew = request.GET.get('renew', True)
+ #if not renew:
+ # TODO: check user SSO session
try:
ticket = ServiceTicket.objects.get(ticket=ticket_string)
+ assert ticket.service == service
+ except ServiceTicket.DoesNotExist:
+ logger.exception("Tried to validate with an invalid ticket %s for %s", ticket_string, service)
+ except Exception as e:
+ logger.exception('Got an exception: %s', e)
+ else:
username = ticket.user.username
- return HttpResponse("yes\n%s\n" % username)
- except:
- pass
- return HttpResponse("no\n\n")
+ ticket.delete()
+
+ results = signals.on_cas_collect_histories.send(sender=validate, for_email=ticket.user.email)
+ histories = '\n'.join('\n'.join(rs) for rc, rs in results)
+ logger.info('Validated %s %s', username, "(also %s)" % histories if histories else '')
+ return HttpResponse("yes\n%s\n%s" % (username, histories))
+ logger.info('Validation failed.')
+ return HttpResponse("no\n\n")
+
- def logout(request, template_name='cas/logout.html'):
+ def logout(request, template_name='cas/logout.html',
+ auto_redirect=settings.CAS_AUTO_REDIRECT_AFTER_LOGOUT):
url = request.GET.get('url', None)
- auth_logout(request)
- return render_to_response(template_name, {'url': url}, context_instance=RequestContext(request))
+ 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))
+
+
+ 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:
+ 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.urlparse(ticket.service)
- serviceUrl = urlparse.urlparse(service)
++ 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
+ 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 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:
++ except urllib2.HTTPError as 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:
++ except urllib2.URLError as 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': message if message else dict(ERROR_MESSAGES).get(code)
+ }, 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, 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
+
+ if settings.CAS_CUSTOM_ATTRIBUTES_CALLBACK:
+ callback = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_CALLBACK)
+ attrs = callback(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 / commitdiff