ac107458/python-capport
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improve Origin handling; forbind non-https origins in production

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This commit is contained in:
Stefan Bühler 2022-04-11 10:29:17 +02:00
parent 3059a81d56
commit 123e94111d
1 changed files with 10 additions and 4 deletions
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14
src/capport/api/views.py
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@ -101,16 +101,22 @@ def check_self_origin():
if origin is None:
# not a request by a modern browser - probably curl or something similar. don't care.
return
origin = origin.lower().strip()
if origin == 'none':
quart.abort(403, 'Origin is none')
origin_parts = origin.split('/')
# Origin should look like: protocol://hostname (possibly a /path suffix?)
# Origin should look like: <scheme>://<hostname> (optionally followed by :<port>)
if len(origin_parts) < 3:
quart.abort(400, 'Broken Origin header')
origin_host = origin_parts[2].lower()
if origin_parts[0] != 'https' and not app.my_config.debug:
# -> require https in production
quart.abort(403, 'Non-https Origin not allowed')
origin_host = origin_parts[2]
host = quart.request.headers.get('Host', None)
if host is None:
quart.abort(400, 'Missing Host header')
quart.abort(403, 'Missing Host header')
if host.lower() != origin_host:
quart.abort(400, 'Origin mismatch')
quart.abort(403, 'Origin mismatch')
@app.route('/', methods=['GET'])