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implement new django csp baseline #551

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b5f68be
implement new django csp baseline
Chiemezuo Aug 13, 2025
7a60ac1
mirror existing csp configuration
Chiemezuo Aug 27, 2025
03b57bb
fix dependency issue
Chiemezuo Aug 27, 2025
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92 changes: 65 additions & 27 deletions bakerydemo/settings/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
import os

import dj_database_url
import django

# Build paths inside the project like this: os.path.join(PROJECT_DIR, ...)
PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
Expand Down Expand Up @@ -226,30 +227,67 @@

# Only enable CSP when enabled through environment variables.
if "CSP_DEFAULT_SRC" in os.environ:
MIDDLEWARE.append("csp.middleware.CSPMiddleware")

# Only report violations, don't enforce policy
CSP_REPORT_ONLY = True

# The “special” source values of 'self', 'unsafe-inline', 'unsafe-eval', and 'none' must be quoted!
# e.g.: CSP_DEFAULT_SRC = "'self'" Without quotes they will not work as intended.

CSP_DEFAULT_SRC = os.environ.get("CSP_DEFAULT_SRC").split(",")
if "CSP_SCRIPT_SRC" in os.environ:
CSP_SCRIPT_SRC = os.environ.get("CSP_SCRIPT_SRC").split(",")
if "CSP_STYLE_SRC" in os.environ:
CSP_STYLE_SRC = os.environ.get("CSP_STYLE_SRC").split(",")
if "CSP_IMG_SRC" in os.environ:
CSP_IMG_SRC = os.environ.get("CSP_IMG_SRC").split(",")
if "CSP_CONNECT_SRC" in os.environ:
CSP_CONNECT_SRC = os.environ.get("CSP_CONNECT_SRC").split(",")
if "CSP_FONT_SRC" in os.environ:
CSP_FONT_SRC = os.environ.get("CSP_FONT_SRC").split(",")
if "CSP_BASE_URI" in os.environ:
CSP_BASE_URI = os.environ.get("CSP_BASE_URI").split(",")
if "CSP_OBJECT_SRC" in os.environ:
CSP_OBJECT_SRC = os.environ.get("CSP_OBJECT_SRC").split(",")
if "CSP_FRAME_SRC" in os.environ:
CSP_FRAME_SRC = os.environ.get("CSP_FRAME_SRC").split(",")
if "CSP_REPORT_URI" in os.environ:
CSP_REPORT_URI = os.environ.get("CSP_REPORT_URI")
if django.VERSION >= (6, 0):

MIDDLEWARE.append("django.middleware.csp.ContentSecurityPolicyMiddleware")
# Gravatar images should be disabled for strict CSP
WAGTAIL_GRAVATAR_PROVIDER_URL = None

# Helper function to convert comma-separated env vars into lists
def get_csp_sources(env_var, default=None):
# From env var, split commas, remove whitespace, and remove quotes
if env_var in os.environ:
return [
item.strip().strip("'\"")
for item in os.environ.get(env_var).split(",")
]
return default or []

# To enforce a CSP policy in report-only mode:
SECURE_CSP_REPORT_ONLY = {}

# Configure CSP directives from environment variables
if "CSP_DEFAULT_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["default-src"] = get_csp_sources("CSP_DEFAULT_SRC")
if "CSP_SCRIPT_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["script-src"] = get_csp_sources("CSP_SCRIPT_SRC")
if "CSP_STYLE_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["style-src"] = get_csp_sources("CSP_STYLE_SRC")
if "CSP_IMG_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["img-src"] = get_csp_sources("CSP_IMG_SRC")
if "CSP_CONNECT_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["connect-src"] = get_csp_sources("CSP_CONNECT_SRC")
if "CSP_FRAME_SRC" in os.environ:
SECURE_CSP_REPORT_ONLY["frame-src"] = get_csp_sources("CSP_FRAME_SRC")
# Add more directives here as required

else:
MIDDLEWARE.append("csp.middleware.CSPMiddleware")

# Only report violations, don't enforce policy
CSP_REPORT_ONLY = True

# The “special” source values of 'self', 'unsafe-inline', 'unsafe-eval', and 'none' must be quoted!
# e.g.: CSP_DEFAULT_SRC = "'self'" Without quotes they will not work as intended.

CSP_DEFAULT_SRC = os.environ.get("CSP_DEFAULT_SRC").split(",")
if "CSP_SCRIPT_SRC" in os.environ:
CSP_SCRIPT_SRC = os.environ.get("CSP_SCRIPT_SRC").split(",")
if "CSP_STYLE_SRC" in os.environ:
CSP_STYLE_SRC = os.environ.get("CSP_STYLE_SRC").split(",")
if "CSP_IMG_SRC" in os.environ:
CSP_IMG_SRC = os.environ.get("CSP_IMG_SRC").split(",")
if "CSP_CONNECT_SRC" in os.environ:
CSP_CONNECT_SRC = os.environ.get("CSP_CONNECT_SRC").split(",")
if "CSP_FONT_SRC" in os.environ:
CSP_FONT_SRC = os.environ.get("CSP_FONT_SRC").split(",")
if "CSP_BASE_URI" in os.environ:
CSP_BASE_URI = os.environ.get("CSP_BASE_URI").split(",")
if "CSP_OBJECT_SRC" in os.environ:
CSP_OBJECT_SRC = os.environ.get("CSP_OBJECT_SRC").split(",")
if "CSP_FRAME_SRC" in os.environ:
CSP_FRAME_SRC = os.environ.get("CSP_FRAME_SRC").split(",")
if "CSP_REPORT_URI" in os.environ:
CSP_REPORT_URI = os.environ.get("CSP_REPORT_URI")

WAGTAILIMAGES_EXTENSIONS = ["gif", "jpg", "jpeg", "png", "webp", "svg"]
2 changes: 1 addition & 1 deletion requirements/base.txt
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
Django>=5.2,<5.3
Django>=5.2,<6.0
django-dotenv==1.4.2
wagtail>=7.1,<7.2
wagtail-font-awesome-svg>=1,<2
Expand Down