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import time
from utils_tests.test_csp import basic_config, basic_policy
from django.contrib.staticfiles.testing import StaticLiveServerTestCase
from django.test import SimpleTestCase
from django.test.selenium import SeleniumTestCase
from django.test.utils import modify_settings, override_settings
from django.utils.csp import CSP
from .views import csp_reports
@override_settings(
MIDDLEWARE=["django.middleware.csp.ContentSecurityPolicyMiddleware"],
ROOT_URLCONF="middleware.urls",
)
class CSPMiddlewareTest(SimpleTestCase):
@override_settings(SECURE_CSP=None, SECURE_CSP_REPORT_ONLY=None)
def test_csp_defaults_off(self):
response = self.client.get("/csp-base/")
self.assertNotIn(CSP.HEADER_ENFORCE, response)
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
@override_settings(SECURE_CSP=basic_config, SECURE_CSP_REPORT_ONLY=None)
def test_csp_basic(self):
"""
With SECURE_CSP set to a valid value, the middleware adds a
"Content-Security-Policy" header to the response.
"""
response = self.client.get("/csp-base/")
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
@override_settings(SECURE_CSP={"default-src": [CSP.SELF, CSP.NONCE]})
def test_csp_basic_with_nonce(self):
"""
Test the nonce is added to the header and matches what is in the view.
"""
response = self.client.get("/csp-nonce/")
nonce = response.text
self.assertTrue(nonce)
self.assertEqual(
response[CSP.HEADER_ENFORCE], f"default-src 'self' 'nonce-{nonce}'"
)
@override_settings(SECURE_CSP={"default-src": [CSP.SELF, CSP.NONCE]})
def test_csp_basic_with_nonce_but_unused(self):
"""
Test if `request.csp_nonce` is never accessed, it is not added to the
header.
"""
response = self.client.get("/csp-base/")
nonce = response.text
self.assertIsNotNone(nonce)
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
@override_settings(SECURE_CSP=None, SECURE_CSP_REPORT_ONLY=basic_config)
def test_csp_report_only_basic(self):
"""
With SECURE_CSP_REPORT_ONLY set to a valid value, the middleware adds a
"Content-Security-Policy-Report-Only" header to the response.
"""
response = self.client.get("/csp-base/")
self.assertEqual(response[CSP.HEADER_REPORT_ONLY], basic_policy)
self.assertNotIn(CSP.HEADER_ENFORCE, response)
@override_settings(
SECURE_CSP=basic_config,
SECURE_CSP_REPORT_ONLY=basic_config,
)
def test_csp_both(self):
"""
If both SECURE_CSP and SECURE_CSP_REPORT_ONLY are set, the middleware
adds both headers to the response.
"""
response = self.client.get("/csp-base/")
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
self.assertEqual(response[CSP.HEADER_REPORT_ONLY], basic_policy)
@override_settings(
DEBUG=True,
SECURE_CSP=basic_config,
SECURE_CSP_REPORT_ONLY=basic_config,
)
def test_csp_404_debug_view(self):
"""
Test that the CSP headers are not added to the debug view.
"""
response = self.client.get("/csp-404/")
self.assertNotIn(CSP.HEADER_ENFORCE, response)
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
@override_settings(
DEBUG=True,
SECURE_CSP=basic_config,
SECURE_CSP_REPORT_ONLY=basic_config,
)
def test_csp_500_debug_view(self):
"""
Test that the CSP headers are not added to the debug view.
"""
with self.assertLogs("django.request", "WARNING"):
response = self.client.get("/csp-500/")
self.assertNotIn(CSP.HEADER_ENFORCE, response)
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
@override_settings(
MIDDLEWARE=["django.middleware.csp.ContentSecurityPolicyMiddleware"],
ROOT_URLCONF="middleware.urls",
SECURE_CSP=basic_config,
SECURE_CSP_REPORT_ONLY=basic_config,
)
class CSPMiddlewareWithDecoratedViewsTest(SimpleTestCase):
def test_no_decorators(self):
response = self.client.get("/csp-base/")
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
self.assertEqual(response[CSP.HEADER_REPORT_ONLY], basic_policy)
def test_csp_disabled_enforced(self):
"""
`csp_override({})` only disables the enforced CSP header.
"""
response = self.client.get("/csp-disabled-enforced/")
self.assertNotIn(CSP.HEADER_ENFORCE, response)
self.assertEqual(response[CSP.HEADER_REPORT_ONLY], basic_policy)
def test_csp_report_only_disabled(self):
"""
`csp_report_only_override({})` only disables the report-only header.
"""
response = self.client.get("/csp-disabled-report-only/")
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
def test_csp_disabled_both(self):
"""
Using both CSP decorators with empty mappings will clear both headers.
"""
response = self.client.get("/csp-disabled-both/")
self.assertNotIn(CSP.HEADER_ENFORCE, response)
self.assertNotIn(CSP.HEADER_REPORT_ONLY, response)
def test_csp_override_enforced(self):
"""
`csp_override` only overrides the enforced header.
"""
response = self.client.get("/csp-override-enforced/")
self.assertEqual(
response[CSP.HEADER_ENFORCE], "default-src 'self'; img-src 'self' data:"
)
self.assertEqual(response[CSP.HEADER_REPORT_ONLY], basic_policy)
def test_csp_report_only_override(self):
"""
`csp_report_only_override` only overrides the report-only header.
"""
response = self.client.get("/csp-override-report-only/")
self.assertEqual(
response[CSP.HEADER_REPORT_ONLY], "default-src 'self'; img-src 'self' data:"
)
self.assertEqual(response[CSP.HEADER_ENFORCE], basic_policy)
def test_csp_override_both_decorator(self):
"""
Using both CSP decorators overrides both CSP Django settings.
"""
response = self.client.get("/csp-override-both/")
self.assertEqual(
response[CSP.HEADER_ENFORCE], "default-src 'self'; img-src 'self' data:"
)
self.assertEqual(
response[CSP.HEADER_REPORT_ONLY], "default-src 'self'; img-src 'self' data:"
)
@override_settings(
ROOT_URLCONF="middleware.urls",
SECURE_CSP_REPORT_ONLY={
"default-src": [CSP.NONE],
"img-src": [CSP.SELF],
"script-src": [CSP.SELF],
"style-src": [CSP.SELF],
"report-uri": "/csp-report/",
},
)
@modify_settings(
MIDDLEWARE={"append": "django.middleware.csp.ContentSecurityPolicyMiddleware"}
)
class CSPSeleniumTestCase(SeleniumTestCase, StaticLiveServerTestCase):
available_apps = ["middleware"]
def setUp(self):
self.addCleanup(csp_reports.clear)
super().setUp()
def test_reports_are_generated(self):
url = self.live_server_url + "/csp-failure/"
self.selenium.get(url)
time.sleep(1) # Allow time for the CSP report to be sent.
reports = sorted(
(r["csp-report"]["document-uri"], r["csp-report"]["violated-directive"])
for r in csp_reports
)
self.assertEqual(reports, [(url, "img-src"), (url, "style-src-elem")])
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