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# SPDX-License-Identifier: CC0-1.0
"""
Haketilo unit tests - modifying requests using webRequest API
"""
# This file is part of Haketilo
#
# Copyright (C) 2021, Wojtek Kosior <koszko@koszko.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the CC0 1.0 Universal License as published by
# the Creative Commons Corporation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# CC0 1.0 Universal License for more details.
import re
from hashlib import sha256
import pytest
from ..script_loader import load_script
from .utils import are_scripts_allowed
allowed_url = 'https://site.with.scripts.allow.ed/'
blocked_url = 'https://site.with.scripts.block.ed/'
payload_url = 'https://site.with.paylo.ad/'
def webrequest_js():
return (load_script('background/webrequest.js',
'#IMPORT common/patterns_query_tree.js AS pqt') +
''';
// Mock pattern tree.
tree = pqt.make();
// Mock default allow.
default_allow = {name: "default_allow", value: true};
// Rule to block scripts.
pqt.register(tree, "%(blocked)s***",
"~allow", 0);
// Rule to allow scripts, but overridden by payload assignment.
pqt.register(tree, "%(payload)s***", "~allow", 1);
pqt.register(tree, "%(payload)s***", "somemapping",
{identifier: "someresource"});
// Mock stream_filter.
stream_filter.apply = (details, headers, policy) => headers;
''' % {'blocked': blocked_url, 'payload': payload_url})
def webrequest_js_start_called():
return webrequest_js() + ';\nstart("somesecret");'
ext_url = 'moz-extension://49de6ce9-49fc-49e1-8102-7ef35286389c/html/settings.html'
prefix = 'X-Haketilo-' + sha256(ext_url.encode()).digest().hex()
# Prepare a list of headers as could be sent by a website.
sample_csp_header = {
'name': 'Content-Security-Policy',
'value': "script-src 'self';"
}
sample_csp_header_idx = 7
sample_headers = [
{'name': 'Content-Type', 'value': 'text/html;charset=utf-8'},
{'name': 'Content-Length', 'value': '61954'},
{'name': 'Content-Language', 'value': 'en'},
{'name': 'Expires', 'value': 'Mon, 12 Mar 2012 11:04...'},
{'name': 'Last-Modified', 'value': 'Fri, 26 Jul 2013 22:50...'},
{'name': 'Cache-Control', 'value': 'max-age=0, s-maxage=86...'},
{'name': 'Age', 'value': '224'},
{'name': 'Server', 'value': 'nginx/1.1.19'},
{'name': 'Date', 'value': 'Thu, 10 Mar 2022 12:09...'}
]
sample_headers.insert(sample_csp_header_idx, sample_csp_header)
# Prepare a list of headers as would be crafted by Haketilo when there is a
# payload to inject.
nonce_source = f'somemapping:someresource:{payload_url}:somesecret'.encode()
nonce = f'nonce-{sha256(nonce_source).digest().hex()}'
payload_csp_header = {
'name': f'Content-Security-Policy',
'value': ("prefetch-src 'none'; script-src-attr 'none'; "
f"script-src '{nonce}' 'unsafe-eval'; script-src-elem '{nonce}';")
}
sample_payload_headers = [
*sample_headers,
{'name': prefix, 'value': ':)'},
payload_csp_header
]
sample_payload_headers[sample_csp_header_idx] = {
**sample_csp_header,
'name': f'{prefix}-{sample_csp_header["name"]}',
}
# Prepare a list of headers as would be crafted by Haketilo when scripts are
# blocked.
sample_blocked_headers = [*sample_payload_headers]
sample_blocked_headers.pop()
sample_blocked_headers.append(sample_csp_header)
sample_blocked_headers.append({
'name': f'Content-Security-Policy',
'value': ("prefetch-src 'none'; script-src-attr 'none'; "
"script-src 'none' 'unsafe-eval'; script-src-elem 'none';")
})
@pytest.mark.get_page('https://gotmyowndoma.in')
@pytest.mark.parametrize('params', [
(sample_headers, allowed_url),
(sample_blocked_headers, blocked_url),
(sample_payload_headers, payload_url),
])
def test_webrequest_on_headers_received(driver, execute_in_page, params):
"""Unit-test the on_headers_received() function."""
headers_out, url = params
execute_in_page(
'''{
// Mock browser object.
const url = arguments[0];
this.browser = {runtime: {getURL: () => url}};
}''',
ext_url)
execute_in_page(webrequest_js())
execute_in_page('secret = "somesecret";')
for headers_in in [
sample_headers,
sample_blocked_headers,
sample_payload_headers
]:
details = {'url': url, 'responseHeaders': headers_in, 'fromCache': True}
res = execute_in_page('returnval(on_headers_received(arguments[0]));',
details)
assert res == {'responseHeaders': headers_out}
@pytest.mark.ext_data({'background_script': webrequest_js_start_called})
@pytest.mark.usefixtures('webextension')
def test_webrequest_real_pages(driver, execute_in_page):
"""
Test webRequest-based header modifications by loading actual pages and
attempting to run scripts within them.
"""
for attempt in range(10):
driver.get('https://site.with.scripts.block.ed/')
if not are_scripts_allowed(driver):
break
assert attempt != 9
driver.get(allowed_url)
assert are_scripts_allowed(driver)
driver.get(payload_url)
assert not are_scripts_allowed(driver)
source = 'somemapping:someresource:https://site.with.paylo.ad/index.html:somesecret'
assert are_scripts_allowed(driver, sha256(source.encode()).digest().hex())
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