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587 lines
23 KiB
Python
587 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import logging
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from django.conf import settings
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from django.http import HttpRequest, HttpResponse
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from django.middleware.csrf import (
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CSRF_KEY_LENGTH, CsrfViewMiddleware, get_token,
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)
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from django.template import RequestContext, Template
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from django.template.context_processors import csrf
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from django.test import SimpleTestCase, override_settings
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from django.views.decorators.csrf import (
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csrf_exempt, ensure_csrf_cookie, requires_csrf_token,
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)
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# Response/views used for CsrfResponseMiddleware and CsrfViewMiddleware tests
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def post_form_response():
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resp = HttpResponse(content="""
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<html><body><h1>\u00a1Unicode!<form method="post"><input type="text" /></form></body></html>
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""", mimetype="text/html")
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return resp
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def post_form_view(request):
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"""A view that returns a POST form (without a token)"""
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return post_form_response()
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# Response/views used for template tag tests
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def token_view(request):
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"""A view that uses {% csrf_token %}"""
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context = RequestContext(request, processors=[csrf])
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template = Template("{% csrf_token %}")
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return HttpResponse(template.render(context))
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def non_token_view_using_request_processor(request):
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"""
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A view that doesn't use the token, but does use the csrf view processor.
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"""
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context = RequestContext(request, processors=[csrf])
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template = Template("")
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return HttpResponse(template.render(context))
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class TestingHttpRequest(HttpRequest):
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"""
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A version of HttpRequest that allows us to change some things
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more easily
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"""
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def is_secure(self):
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return getattr(self, '_is_secure_override', False)
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class CsrfViewMiddlewareTest(SimpleTestCase):
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# The csrf token is potentially from an untrusted source, so could have
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# characters that need dealing with.
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_csrf_id_cookie = b"<1>\xc2\xa1"
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_csrf_id = "1"
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def _get_GET_no_csrf_cookie_request(self):
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return TestingHttpRequest()
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def _get_GET_csrf_cookie_request(self):
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req = TestingHttpRequest()
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req.COOKIES[settings.CSRF_COOKIE_NAME] = self._csrf_id_cookie
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return req
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def _get_POST_csrf_cookie_request(self):
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req = self._get_GET_csrf_cookie_request()
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req.method = "POST"
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return req
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def _get_POST_no_csrf_cookie_request(self):
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req = self._get_GET_no_csrf_cookie_request()
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req.method = "POST"
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return req
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def _get_POST_request_with_token(self):
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req = self._get_POST_csrf_cookie_request()
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req.POST['csrfmiddlewaretoken'] = self._csrf_id
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return req
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def _check_token_present(self, response, csrf_id=None):
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self.assertContains(response, "name='csrfmiddlewaretoken' value='%s'" % (csrf_id or self._csrf_id))
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def test_process_view_token_too_long(self):
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"""
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If the token is longer than expected, it is ignored and a new token is
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created.
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"""
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req = self._get_GET_no_csrf_cookie_request()
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req.COOKIES[settings.CSRF_COOKIE_NAME] = 'x' * 10000000
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CsrfViewMiddleware().process_view(req, token_view, (), {})
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resp = token_view(req)
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resp2 = CsrfViewMiddleware().process_response(req, resp)
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csrf_cookie = resp2.cookies.get(settings.CSRF_COOKIE_NAME, False)
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self.assertEqual(len(csrf_cookie.value), CSRF_KEY_LENGTH)
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def test_process_response_get_token_used(self):
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"""
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When get_token is used, check that the cookie is created and headers
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patched.
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"""
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req = self._get_GET_no_csrf_cookie_request()
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# Put tests for CSRF_COOKIE_* settings here
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with self.settings(CSRF_COOKIE_NAME='myname',
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CSRF_COOKIE_DOMAIN='.example.com',
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CSRF_COOKIE_PATH='/test/',
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CSRF_COOKIE_SECURE=True,
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CSRF_COOKIE_HTTPONLY=True):
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# token_view calls get_token() indirectly
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CsrfViewMiddleware().process_view(req, token_view, (), {})
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resp = token_view(req)
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resp2 = CsrfViewMiddleware().process_response(req, resp)
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csrf_cookie = resp2.cookies.get('myname', False)
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self.assertNotEqual(csrf_cookie, False)
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self.assertEqual(csrf_cookie['domain'], '.example.com')
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self.assertEqual(csrf_cookie['secure'], True)
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self.assertEqual(csrf_cookie['httponly'], True)
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self.assertEqual(csrf_cookie['path'], '/test/')
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self.assertIn('Cookie', resp2.get('Vary', ''))
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def test_process_response_get_token_not_used(self):
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"""
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Check that if get_token() is not called, the view middleware does not
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add a cookie.
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"""
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# This is important to make pages cacheable. Pages which do call
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# get_token(), assuming they use the token, are not cacheable because
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# the token is specific to the user
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req = self._get_GET_no_csrf_cookie_request()
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# non_token_view_using_request_processor does not call get_token(), but
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# does use the csrf request processor. By using this, we are testing
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# that the view processor is properly lazy and doesn't call get_token()
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# until needed.
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CsrfViewMiddleware().process_view(req, non_token_view_using_request_processor, (), {})
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resp = non_token_view_using_request_processor(req)
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resp2 = CsrfViewMiddleware().process_response(req, resp)
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csrf_cookie = resp2.cookies.get(settings.CSRF_COOKIE_NAME, False)
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self.assertEqual(csrf_cookie, False)
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# Check the request processing
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def test_process_request_no_csrf_cookie(self):
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"""
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Check that if no CSRF cookies is present, the middleware rejects the
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incoming request. This will stop login CSRF.
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"""
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req = self._get_POST_no_csrf_cookie_request()
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertEqual(403, req2.status_code)
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def test_process_request_csrf_cookie_no_token(self):
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"""
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Check that if a CSRF cookie is present but no token, the middleware
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rejects the incoming request.
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"""
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req = self._get_POST_csrf_cookie_request()
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertEqual(403, req2.status_code)
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def test_process_request_csrf_cookie_and_token(self):
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"""
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Check that if both a cookie and a token is present, the middleware lets it through.
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"""
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req = self._get_POST_request_with_token()
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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def test_process_request_csrf_cookie_no_token_exempt_view(self):
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"""
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Check that if a CSRF cookie is present and no token, but the csrf_exempt
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decorator has been applied to the view, the middleware lets it through
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"""
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req = self._get_POST_csrf_cookie_request()
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req2 = CsrfViewMiddleware().process_view(req, csrf_exempt(post_form_view), (), {})
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self.assertIsNone(req2)
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def test_csrf_token_in_header(self):
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"""
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Check that we can pass in the token in a header instead of in the form
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"""
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req = self._get_POST_csrf_cookie_request()
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req.META['HTTP_X_CSRFTOKEN'] = self._csrf_id
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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@override_settings(CSRF_HEADER_NAME='HTTP_X_CSRFTOKEN_CUSTOMIZED')
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def test_csrf_token_in_header_with_customized_name(self):
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"""
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settings.CSRF_HEADER_NAME can be used to customize the CSRF header name
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"""
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req = self._get_POST_csrf_cookie_request()
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req.META['HTTP_X_CSRFTOKEN_CUSTOMIZED'] = self._csrf_id
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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def test_put_and_delete_rejected(self):
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"""
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Tests that HTTP PUT and DELETE methods have protection
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"""
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req = TestingHttpRequest()
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req.method = 'PUT'
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertEqual(403, req2.status_code)
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req = TestingHttpRequest()
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req.method = 'DELETE'
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertEqual(403, req2.status_code)
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def test_put_and_delete_allowed(self):
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"""
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Tests that HTTP PUT and DELETE methods can get through with
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X-CSRFToken and a cookie
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"""
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req = self._get_GET_csrf_cookie_request()
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req.method = 'PUT'
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req.META['HTTP_X_CSRFTOKEN'] = self._csrf_id
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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req = self._get_GET_csrf_cookie_request()
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req.method = 'DELETE'
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req.META['HTTP_X_CSRFTOKEN'] = self._csrf_id
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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# Tests for the template tag method
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def test_token_node_no_csrf_cookie(self):
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"""
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Check that CsrfTokenNode works when no CSRF cookie is set
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"""
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req = self._get_GET_no_csrf_cookie_request()
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resp = token_view(req)
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token = get_token(req)
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self.assertIsNotNone(token)
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self._check_token_present(resp, token)
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def test_token_node_empty_csrf_cookie(self):
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"""
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Check that we get a new token if the csrf_cookie is the empty string
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"""
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req = self._get_GET_no_csrf_cookie_request()
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req.COOKIES[settings.CSRF_COOKIE_NAME] = b""
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CsrfViewMiddleware().process_view(req, token_view, (), {})
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resp = token_view(req)
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token = get_token(req)
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self.assertIsNotNone(token)
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self._check_token_present(resp, token)
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def test_token_node_with_csrf_cookie(self):
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"""
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Check that CsrfTokenNode works when a CSRF cookie is set
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"""
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req = self._get_GET_csrf_cookie_request()
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CsrfViewMiddleware().process_view(req, token_view, (), {})
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resp = token_view(req)
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self._check_token_present(resp)
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def test_get_token_for_exempt_view(self):
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"""
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Check that get_token still works for a view decorated with 'csrf_exempt'.
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"""
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req = self._get_GET_csrf_cookie_request()
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CsrfViewMiddleware().process_view(req, csrf_exempt(token_view), (), {})
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resp = token_view(req)
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self._check_token_present(resp)
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def test_get_token_for_requires_csrf_token_view(self):
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"""
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Check that get_token works for a view decorated solely with requires_csrf_token
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"""
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req = self._get_GET_csrf_cookie_request()
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resp = requires_csrf_token(token_view)(req)
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self._check_token_present(resp)
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def test_token_node_with_new_csrf_cookie(self):
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"""
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Check that CsrfTokenNode works when a CSRF cookie is created by
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the middleware (when one was not already present)
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"""
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req = self._get_GET_no_csrf_cookie_request()
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CsrfViewMiddleware().process_view(req, token_view, (), {})
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resp = token_view(req)
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resp2 = CsrfViewMiddleware().process_response(req, resp)
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csrf_cookie = resp2.cookies[settings.CSRF_COOKIE_NAME]
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self._check_token_present(resp, csrf_id=csrf_cookie.value)
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@override_settings(DEBUG=True)
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def test_https_bad_referer(self):
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"""
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Test that a POST HTTPS request with a bad referer is rejected
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://www.evil.org/somepage'
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req.META['SERVER_PORT'] = '443'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(
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response,
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'Referer checking failed - https://www.evil.org/somepage does not '
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'match any trusted origins.',
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status_code=403,
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)
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@override_settings(DEBUG=True)
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def test_https_malformed_referer(self):
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"""
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A POST HTTPS request with a bad referer is rejected.
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"""
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malformed_referer_msg = 'Referer checking failed - Referer is malformed.'
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_REFERER'] = 'http://http://www.example.com/'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(
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response,
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'Referer checking failed - Referer is insecure while host is secure.',
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status_code=403,
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)
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# Empty
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req.META['HTTP_REFERER'] = ''
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(response, malformed_referer_msg, status_code=403)
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# Non-ASCII
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req.META['HTTP_REFERER'] = b'\xd8B\xf6I\xdf'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(response, malformed_referer_msg, status_code=403)
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# missing scheme
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# >>> urlparse('//example.com/')
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# ParseResult(scheme='', netloc='example.com', path='/', params='', query='', fragment='')
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req.META['HTTP_REFERER'] = '//example.com/'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(response, malformed_referer_msg, status_code=403)
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# missing netloc
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# >>> urlparse('https://')
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# ParseResult(scheme='https', netloc='', path='', params='', query='', fragment='')
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req.META['HTTP_REFERER'] = 'https://'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(response, malformed_referer_msg, status_code=403)
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@override_settings(ALLOWED_HOSTS=['www.example.com'])
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def test_https_good_referer(self):
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"""
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A POST HTTPS request with a good referer is accepted.
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://www.example.com/somepage'
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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@override_settings(ALLOWED_HOSTS=['www.example.com'])
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def test_https_good_referer_2(self):
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"""
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A POST HTTPS request with a good referer is accepted where the referer
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contains no trailing slash.
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"""
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# See ticket #15617
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://www.example.com'
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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@override_settings(ALLOWED_HOSTS=['www.example.com'], CSRF_TRUSTED_ORIGINS=['dashboard.example.com'])
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def test_https_csrf_trusted_origin_allowed(self):
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"""
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A POST HTTPS request with a referer added to the CSRF_TRUSTED_ORIGINS
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setting is accepted.
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://dashboard.example.com'
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req2 = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(req2)
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@override_settings(ALLOWED_HOSTS=['www.example.com'], CSRF_TRUSTED_ORIGINS=['.example.com'])
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def test_https_csrf_wildcard_trusted_origin_allowed(self):
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"""
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A POST HTTPS request with a referer that matches a CSRF_TRUSTED_ORIGINS
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wildcard is accepted.
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://dashboard.example.com'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(response)
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@override_settings(ALLOWED_HOSTS=['www.example.com'], CSRF_COOKIE_DOMAIN='.example.com')
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def test_https_good_referer_matches_cookie_domain(self):
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"""
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A POST HTTPS request with a good referer should be accepted from a
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subdomain that's allowed by CSRF_COOKIE_DOMAIN.
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_REFERER'] = 'https://foo.example.com/'
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req.META['SERVER_PORT'] = '443'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(response)
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@override_settings(ALLOWED_HOSTS=['www.example.com'], CSRF_COOKIE_DOMAIN='.example.com')
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def test_https_good_referer_matches_cookie_domain_with_different_port(self):
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"""
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A POST HTTPS request with a good referer should be accepted from a
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subdomain that's allowed by CSRF_COOKIE_DOMAIN and a non-443 port.
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"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_HOST'] = 'www.example.com'
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req.META['HTTP_REFERER'] = 'https://foo.example.com:4443/'
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req.META['SERVER_PORT'] = '4443'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertIsNone(response)
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@override_settings(CSRF_COOKIE_DOMAIN='.example.com', DEBUG=True)
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def test_https_reject_insecure_referer(self):
|
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"""
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|
A POST HTTPS request from an insecure referer should be rejected.
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|
"""
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req = self._get_POST_request_with_token()
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req._is_secure_override = True
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req.META['HTTP_REFERER'] = 'http://example.com/'
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req.META['SERVER_PORT'] = '443'
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response = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
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self.assertContains(
|
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response,
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'Referer checking failed - Referer is insecure while host is secure.',
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status_code=403,
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|
)
|
|
|
|
def test_ensures_csrf_cookie_no_middleware(self):
|
|
"""
|
|
The ensure_csrf_cookie() decorator works without middleware.
|
|
"""
|
|
@ensure_csrf_cookie
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def view(request):
|
|
# Doesn't insert a token or anything
|
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return HttpResponse(content="")
|
|
|
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req = self._get_GET_no_csrf_cookie_request()
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resp = view(req)
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self.assertTrue(resp.cookies.get(settings.CSRF_COOKIE_NAME, False))
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self.assertIn('Cookie', resp.get('Vary', ''))
|
|
|
|
def test_ensures_csrf_cookie_with_middleware(self):
|
|
"""
|
|
The ensure_csrf_cookie() decorator works with the CsrfViewMiddleware
|
|
enabled.
|
|
"""
|
|
@ensure_csrf_cookie
|
|
def view(request):
|
|
# Doesn't insert a token or anything
|
|
return HttpResponse(content="")
|
|
|
|
req = self._get_GET_no_csrf_cookie_request()
|
|
CsrfViewMiddleware().process_view(req, view, (), {})
|
|
resp = view(req)
|
|
resp2 = CsrfViewMiddleware().process_response(req, resp)
|
|
self.assertTrue(resp2.cookies.get(settings.CSRF_COOKIE_NAME, False))
|
|
self.assertIn('Cookie', resp2.get('Vary', ''))
|
|
|
|
def test_ensures_csrf_cookie_no_logging(self):
|
|
"""
|
|
ensure_csrf_cookie() doesn't log warnings (#19436).
|
|
"""
|
|
@ensure_csrf_cookie
|
|
def view(request):
|
|
# Doesn't insert a token or anything
|
|
return HttpResponse(content="")
|
|
|
|
class TestHandler(logging.Handler):
|
|
def emit(self, record):
|
|
raise Exception("This shouldn't have happened!")
|
|
|
|
logger = logging.getLogger('django.request')
|
|
test_handler = TestHandler()
|
|
old_log_level = logger.level
|
|
try:
|
|
logger.addHandler(test_handler)
|
|
logger.setLevel(logging.WARNING)
|
|
|
|
req = self._get_GET_no_csrf_cookie_request()
|
|
view(req)
|
|
finally:
|
|
logger.removeHandler(test_handler)
|
|
logger.setLevel(old_log_level)
|
|
|
|
def test_csrf_cookie_age(self):
|
|
"""
|
|
CSRF cookie age can be set using settings.CSRF_COOKIE_AGE.
|
|
"""
|
|
req = self._get_GET_no_csrf_cookie_request()
|
|
|
|
MAX_AGE = 123
|
|
with self.settings(CSRF_COOKIE_NAME='csrfcookie',
|
|
CSRF_COOKIE_DOMAIN='.example.com',
|
|
CSRF_COOKIE_AGE=MAX_AGE,
|
|
CSRF_COOKIE_PATH='/test/',
|
|
CSRF_COOKIE_SECURE=True,
|
|
CSRF_COOKIE_HTTPONLY=True):
|
|
# token_view calls get_token() indirectly
|
|
CsrfViewMiddleware().process_view(req, token_view, (), {})
|
|
resp = token_view(req)
|
|
|
|
resp2 = CsrfViewMiddleware().process_response(req, resp)
|
|
max_age = resp2.cookies.get('csrfcookie').get('max-age')
|
|
self.assertEqual(max_age, MAX_AGE)
|
|
|
|
def test_csrf_cookie_age_none(self):
|
|
"""
|
|
CSRF cookie age does not have max age set and therefore uses
|
|
session-based cookies.
|
|
"""
|
|
req = self._get_GET_no_csrf_cookie_request()
|
|
|
|
MAX_AGE = None
|
|
with self.settings(CSRF_COOKIE_NAME='csrfcookie',
|
|
CSRF_COOKIE_DOMAIN='.example.com',
|
|
CSRF_COOKIE_AGE=MAX_AGE,
|
|
CSRF_COOKIE_PATH='/test/',
|
|
CSRF_COOKIE_SECURE=True,
|
|
CSRF_COOKIE_HTTPONLY=True):
|
|
# token_view calls get_token() indirectly
|
|
CsrfViewMiddleware().process_view(req, token_view, (), {})
|
|
resp = token_view(req)
|
|
|
|
resp2 = CsrfViewMiddleware().process_response(req, resp)
|
|
max_age = resp2.cookies.get('csrfcookie').get('max-age')
|
|
self.assertEqual(max_age, '')
|
|
|
|
def test_post_data_read_failure(self):
|
|
"""
|
|
#20128 -- IOErrors during POST data reading should be caught and
|
|
treated as if the POST data wasn't there.
|
|
"""
|
|
class CsrfPostRequest(HttpRequest):
|
|
"""
|
|
HttpRequest that can raise an IOError when accessing POST data
|
|
"""
|
|
def __init__(self, token, raise_error):
|
|
super(CsrfPostRequest, self).__init__()
|
|
self.method = 'POST'
|
|
|
|
self.raise_error = False
|
|
self.COOKIES[settings.CSRF_COOKIE_NAME] = token
|
|
self.POST['csrfmiddlewaretoken'] = token
|
|
self.raise_error = raise_error
|
|
|
|
def _load_post_and_files(self):
|
|
raise IOError('error reading input data')
|
|
|
|
def _get_post(self):
|
|
if self.raise_error:
|
|
self._load_post_and_files()
|
|
return self._post
|
|
|
|
def _set_post(self, post):
|
|
self._post = post
|
|
|
|
POST = property(_get_post, _set_post)
|
|
|
|
token = 'ABC'
|
|
|
|
req = CsrfPostRequest(token, raise_error=False)
|
|
resp = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
|
|
self.assertIsNone(resp)
|
|
|
|
req = CsrfPostRequest(token, raise_error=True)
|
|
resp = CsrfViewMiddleware().process_view(req, post_form_view, (), {})
|
|
self.assertEqual(resp.status_code, 403)
|