-from lxml import etree
-from urllib import urlencode
-import urllib2
-import urlparse
+from __future__ import unicode_literals
+
+import logging
+logger = logging.getLogger('cas_provider.views')
+
+try:
+ from urllib.error import HTTPError, URLError
+ from urllib.parse import parse_qsl, urlencode, urlparse, urlsplit, urlunsplit
+ from urllib.request import urlopen
+except ImportError:
+ from urllib import urlencode
+ from urllib2 import HTTPError, URLError, urlopen
+ from urlparse import parse_qsl, urlparse, urlsplit, urlunsplit
+from functools import wraps
+
+from django.utils.decorators import available_attrs
+from django.views.decorators.debug import sensitive_post_parameters
+from django.views.decorators.cache import cache_control
+from django.utils.cache import patch_cache_control
+from django.views.decorators.csrf import csrf_protect
+
+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.utils.translation import ugettext as _
from django.template import RequestContext
+from django.contrib.auth import authenticate
+from django.core.urlresolvers import reverse
+from django.utils.translation import ugettext as _
+
+from lxml import etree
from cas_provider.attribute_formatters import NSMAP, CAS
from cas_provider.models import ProxyGrantingTicket, ProxyTicket
-from forms import LoginForm
-from models import ServiceTicket, LoginTicket
+from cas_provider.models import ServiceTicket
+
+from cas_provider.forms import LoginForm, MergeLoginForm
+from . import signals
__all__ = ['login', 'validate', 'logout', 'service_validate']
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'),
+ (INVALID_TICKET, 'The provided ticket is invalid.'),
+ (INVALID_SERVICE, 'Service is invalid'),
+ (INVALID_REQUEST, 'Not all required parameters were sent.'),
+ (INTERNAL_ERROR, 'An internal error occurred during ticket validation'),
)
-def login(request, template_name='cas/login.html',\
+logger = logging.getLogger(__name__)
+
+
+_never_cache = cache_control(no_cache=True, must_revalidate=True)
+
+
+def never_cache(view_func):
+ """
+ Decorator that adds headers to a response so that it will
+ never be cached.
+ """
+ @wraps(view_func, assigned=available_attrs(view_func))
+ def _wrapped_view_func(request, *args, **kwargs):
+ response = view_func(request, *args, **kwargs)
+ patch_cache_control(response, no_cache=True,
+ must_revalidate=True, proxy_revalidate=True)
+ response['Pragma'] = 'no-cache'
+ return response
+ return _wrapped_view_func
+
+
+@sensitive_post_parameters()
+@csrf_protect
+@never_cache
+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['username'],
+ 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:
+ # 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,
+ username=form.cleaned_data['username'],
+ )
+ if service is not None:
+ args['service'] = service
+ args = 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, 'username': request.GET.get('username')})
+ 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. Please contact us if you feel it should be enabled again.'))
+ 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)
+
+ signals.on_cas_login_success.send(sender=login, request=request,
+ service=service, **kwargs)
+
+ 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 = 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 = 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))
+
+@never_cache
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:
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
+ ticket.delete()
+
+ results = signals.on_cas_collect_histories.send(sender=validate, for_user=ticket.user)
+ 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")
+@never_cache
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):
+ 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))
+
+@never_cache
def proxy(request):
- targetService = request.GET['targetService']
- pgtiou = request.GET['pgt']
+ targetService = request.GET['targetService']
+ pgt_id = request.GET['pgt']
try:
- proxyGrantingTicket = ProxyGrantingTicket.objects.get(pgtiou=pgtiou)
+ 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,
+ pt = ProxyTicket.objects.create(proxyGrantingTicket=proxyGrantingTicket,
+ user=proxyGrantingTicket.user,
service=targetService)
return _cas2_proxy_success(pt.ticket)
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:
- return _cas2_error_response(INVALID_SERVICE)
+ 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 pgt:
pgtIouId = pgt.pgtiou
- while pgt:
- proxies += (pgt.serviceTicket.service,)
- pgt = pgt.serviceTicket.proxyGrantingTicket if hasattr(pgt.serviceTicket, 'proxyGrantingTicket') else None
-
+ 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)
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)
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))
+ uri = list(urlsplit(pgt_url))
pgt = ProxyGrantingTicket()
- pgt.serviceTicket = ticket
-
- if hasattr(ticket, 'proxyGrantingTicket'):
- # here we got a proxy ticket! tata!
- pgt.pgt = ticket.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(urlparse.parse_qsl(uri[4]))
+ query = dict(parse_qsl(uri[4]))
query.update(params)
- uri[4] = urlencode(query)
-
+ uri[3] = urlencode(query)
try:
- response = urllib2.urlopen(urlparse.urlunsplit(uri))
- except urllib2.HTTPError, e:
+ 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 urllib2.URLError, e:
+ except URLError as e:
+ logger.debug('Checking Proxy Callback URL {0} raised URLError. Not issuing PGT.'.format(uri))
return
pgt.save()
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">
+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)
- }, mimetype='text/xml')
+ '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 unicode(etree.tostring(response, encoding='utf-8'), 'utf-8')
-
-def auth_success_response(user, pgt, proxies):
+ 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
- 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)
+ 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")
+ 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')
+ return etree.tostring(response, encoding='unicode')
fnp / django-cas-provider.git / blobdiff