mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-23 08:11:00 +00:00
501 lines
16 KiB
Python
501 lines
16 KiB
Python
import copy
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import logging
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import os
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import sys
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import threading
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import urllib
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import time
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from netlib import tcp, http, wsgi, certutils, websockets, odict
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from netlib.http import http1, http2
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from . import version, app, language, utils, log, protocols
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import language.http
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import language.actions
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import language.exceptions
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import language.websockets
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DEFAULT_CERT_DOMAIN = "pathod.net"
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CONFDIR = "~/.mitmproxy"
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CERTSTORE_BASENAME = "mitmproxy"
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CA_CERT_NAME = "mitmproxy-ca.pem"
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DEFAULT_CRAFT_ANCHOR = "/p/"
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logger = logging.getLogger('pathod')
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class PathodError(Exception):
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pass
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class SSLOptions(object):
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def __init__(
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self,
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confdir=CONFDIR,
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cn=None,
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sans=(),
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not_after_connect=None,
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request_client_cert=False,
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ssl_version=tcp.SSL_DEFAULT_METHOD,
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ciphers=None,
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certs=None,
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alpn_select=http2.HTTP2Protocol.ALPN_PROTO_H2,
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):
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self.confdir = confdir
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self.cn = cn
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self.sans = sans
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self.not_after_connect = not_after_connect
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self.request_client_cert = request_client_cert
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self.ssl_version = ssl_version
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self.ciphers = ciphers
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self.alpn_select = alpn_select
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self.certstore = certutils.CertStore.from_store(
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os.path.expanduser(confdir),
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CERTSTORE_BASENAME
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)
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for i in certs or []:
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self.certstore.add_cert_file(*i)
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def get_cert(self, name):
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if self.cn:
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name = self.cn
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elif not name:
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name = DEFAULT_CERT_DOMAIN
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return self.certstore.get_cert(name, self.sans)
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class PathodHandler(tcp.BaseHandler):
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wbufsize = 0
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sni = None
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def __init__(
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self,
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connection,
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address,
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server,
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logfp,
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settings,
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http2_framedump=False
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):
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tcp.BaseHandler.__init__(self, connection, address, server)
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self.logfp = logfp
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self.settings = copy.copy(settings)
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self.protocol = None
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self.use_http2 = False
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self.http2_framedump = http2_framedump
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def _handle_sni(self, connection):
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self.sni = connection.get_servername()
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def http_serve_crafted(self, crafted, logctx):
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error, crafted = self.server.check_policy(
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crafted, self.settings
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)
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if error:
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err = self.make_http_error_response(error)
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language.serve(err, self.wfile, self.settings)
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return None, dict(
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type="error",
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msg=error
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)
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if self.server.explain and not hasattr(crafted, 'is_error_response'):
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crafted = crafted.freeze(self.settings)
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logctx(">> Spec: %s" % crafted.spec())
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response_log = language.serve(
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crafted,
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self.wfile,
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self.settings
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)
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if response_log["disconnect"]:
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return None, response_log
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return self.handle_http_request, response_log
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def handle_http_request(self, logger):
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"""
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Returns a (handler, log) tuple.
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handler: Handler for the next request, or None to disconnect
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log: A dictionary, or None
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"""
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with logger.ctx() as lg:
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try:
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req = self.protocol.read_request()
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except http.HttpError as s:
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s = str(s)
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lg(s)
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return None, dict(type="error", msg=s)
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if isinstance(req, http.EmptyRequest):
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return None, None
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if isinstance(req, http.ConnectRequest):
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return self.protocol.handle_http_connect([req.host, req.port, req.path], lg)
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method = req.method
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path = req.path
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httpversion = req.httpversion
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headers = req.headers
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body = req.body
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clientcert = None
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if self.clientcert:
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clientcert = dict(
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cn=self.clientcert.cn,
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subject=self.clientcert.subject,
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serial=self.clientcert.serial,
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notbefore=self.clientcert.notbefore.isoformat(),
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notafter=self.clientcert.notafter.isoformat(),
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keyinfo=self.clientcert.keyinfo,
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)
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retlog = dict(
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type="crafted",
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protocol="http",
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request=dict(
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path=path,
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method=method,
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headers=headers.lst,
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httpversion=httpversion,
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sni=self.sni,
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remote_address=self.address(),
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clientcert=clientcert,
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),
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cipher=None,
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)
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if self.ssl_established:
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retlog["cipher"] = self.get_current_cipher()
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m = utils.MemBool()
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websocket_key = websockets.WebsocketsProtocol.check_client_handshake(headers)
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self.settings.websocket_key = websocket_key
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# If this is a websocket initiation, we respond with a proper
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# server response, unless over-ridden.
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if websocket_key:
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anchor_gen = language.parse_pathod("ws")
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else:
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anchor_gen = None
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for regex, spec in self.server.anchors:
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if regex.match(path):
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anchor_gen = language.parse_pathod(spec, self.use_http2)
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break
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else:
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if m(path.startswith(self.server.craftanchor)):
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spec = urllib.unquote(path)[len(self.server.craftanchor):]
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if spec:
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try:
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anchor_gen = language.parse_pathod(spec, self.use_http2)
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except language.ParseException as v:
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lg("Parse error: %s" % v.msg)
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anchor_gen = iter([self.make_http_error_response(
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"Parse Error",
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"Error parsing response spec: %s\n" % (
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v.msg + v.marked()
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)
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)])
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else:
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if self.use_http2:
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anchor_gen = iter([self.make_http_error_response(
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"Spec Error",
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"HTTP/2 only supports request/response with the craft anchor point: %s" %
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self.server.craftanchor
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)])
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if anchor_gen:
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spec = anchor_gen.next()
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if self.use_http2 and isinstance(spec, language.http2.Response):
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spec.stream_id = req.stream_id
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lg("crafting spec: %s" % spec)
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nexthandler, retlog["response"] = self.http_serve_crafted(
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spec,
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lg
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)
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if nexthandler and websocket_key:
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self.protocol = protocols.websockets.WebsocketsProtocol(self)
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return self.protocol.handle_websocket, retlog
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else:
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return nexthandler, retlog
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else:
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return self.protocol.handle_http_app(method, path, headers, body, lg)
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def make_http_error_response(self, reason, body=None):
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resp = self.protocol.make_error_response(reason, body)
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resp.is_error_response = True
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return resp
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def handle(self):
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self.settimeout(self.server.timeout)
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if self.server.ssl:
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try:
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cert, key, _ = self.server.ssloptions.get_cert(None)
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self.convert_to_ssl(
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cert,
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key,
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handle_sni=self._handle_sni,
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request_client_cert=self.server.ssloptions.request_client_cert,
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cipher_list=self.server.ssloptions.ciphers,
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method=self.server.ssloptions.ssl_version,
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alpn_select=self.server.ssloptions.alpn_select,
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)
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except tcp.NetLibError as v:
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s = str(v)
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self.server.add_log(
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dict(
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type="error",
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msg=s
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)
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)
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log.write_raw(self.logfp, s)
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return
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alp = self.get_alpn_proto_negotiated()
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if alp == http2.HTTP2Protocol.ALPN_PROTO_H2:
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self.protocol = protocols.http2.HTTP2Protocol(self)
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self.use_http2 = True
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if not self.protocol:
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self.protocol = protocols.http.HTTPProtocol(self)
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lr = self.rfile if self.server.logreq else None
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lw = self.wfile if self.server.logresp else None
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logger = log.ConnectionLogger(self.logfp, self.server.hexdump, lr, lw)
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self.settings.protocol = self.protocol
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handler = self.handle_http_request
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while not self.finished:
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handler, l = handler(logger)
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if l:
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self.addlog(l)
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if not handler:
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return
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def addlog(self, log):
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# FIXME: The bytes in the log should not be escaped. We do this at the
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# moment because JSON encoding can't handle binary data, and I don't
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# want to base64 everything.
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if self.server.logreq:
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encoded_bytes = self.rfile.get_log().encode("string_escape")
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log["request_bytes"] = encoded_bytes
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if self.server.logresp:
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encoded_bytes = self.wfile.get_log().encode("string_escape")
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log["response_bytes"] = encoded_bytes
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self.server.add_log(log)
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class Pathod(tcp.TCPServer):
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LOGBUF = 500
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def __init__(
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self,
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addr,
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ssl=False,
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ssloptions=None,
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craftanchor=DEFAULT_CRAFT_ANCHOR,
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staticdir=None,
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anchors=(),
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sizelimit=None,
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noweb=False,
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nocraft=False,
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noapi=False,
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nohang=False,
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timeout=None,
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logreq=False,
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logresp=False,
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explain=False,
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hexdump=False,
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http2_framedump=False,
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webdebug=False,
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logfp=sys.stdout,
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):
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"""
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addr: (address, port) tuple. If port is 0, a free port will be
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automatically chosen.
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ssloptions: an SSLOptions object.
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craftanchor: URL prefix specifying the path under which to anchor
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response generation.
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staticdir: path to a directory of static resources, or None.
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anchors: List of (regex object, language.Request object) tuples, or
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None.
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sizelimit: Limit size of served data.
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nocraft: Disable response crafting.
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noapi: Disable the API.
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nohang: Disable pauses.
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"""
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tcp.TCPServer.__init__(self, addr)
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self.ssl = ssl
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self.ssloptions = ssloptions or SSLOptions()
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self.staticdir = staticdir
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self.craftanchor = craftanchor
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self.sizelimit = sizelimit
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self.noweb, self.nocraft = noweb, nocraft
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self.noapi, self.nohang = noapi, nohang
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self.timeout, self.logreq = timeout, logreq
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self.logresp, self.hexdump = logresp, hexdump
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self.http2_framedump = http2_framedump
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self.explain = explain
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self.logfp = logfp
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self.app = app.make_app(noapi, webdebug)
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self.app.config["pathod"] = self
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self.log = []
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self.logid = 0
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self.anchors = anchors
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self.settings = language.Settings(
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staticdir=self.staticdir
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)
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def check_policy(self, req, settings):
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"""
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A policy check that verifies the request size is within limits.
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"""
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if self.nocraft:
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return "Crafting disabled.", None
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try:
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req = req.resolve(settings)
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l = req.maximum_length(settings)
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except language.FileAccessDenied:
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return "File access denied.", None
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if self.sizelimit and l > self.sizelimit:
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return "Response too large.", None
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pauses = [isinstance(i, language.actions.PauseAt) for i in req.actions]
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if self.nohang and any(pauses):
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return "Pauses have been disabled.", None
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return None, req
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def handle_client_connection(self, request, client_address):
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h = PathodHandler(
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request,
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client_address,
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self,
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self.logfp,
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self.settings,
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self.http2_framedump,
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)
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try:
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h.handle()
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h.finish()
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except tcp.NetLibDisconnect: # pragma: no cover
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log.write_raw(self.logfp, "Disconnect")
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self.add_log(
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dict(
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type="error",
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msg="Disconnect"
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)
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)
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return
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except tcp.NetLibTimeout:
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log.write_raw(self.logfp, "Timeout")
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self.add_log(
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dict(
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type="timeout",
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)
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)
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return
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def add_log(self, d):
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if not self.noapi:
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lock = threading.Lock()
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with lock:
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d["id"] = self.logid
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self.log.insert(0, d)
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if len(self.log) > self.LOGBUF:
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self.log.pop()
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self.logid += 1
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return d["id"]
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def clear_log(self):
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lock = threading.Lock()
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with lock:
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self.log = []
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def log_by_id(self, identifier):
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for i in self.log:
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if i["id"] == identifier:
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return i
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def get_log(self):
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return self.log
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def main(args): # pragma: nocover
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ssloptions = SSLOptions(
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cn=args.cn,
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confdir=args.confdir,
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not_after_connect=args.ssl_not_after_connect,
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ciphers=args.ciphers,
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ssl_version=args.ssl_version,
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certs=args.ssl_certs,
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sans=args.sans,
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)
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root = logging.getLogger()
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if root.handlers:
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for handler in root.handlers:
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root.removeHandler(handler)
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log = logging.getLogger('pathod')
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log.setLevel(logging.DEBUG)
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fmt = logging.Formatter(
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'%(asctime)s: %(message)s',
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datefmt='%d-%m-%y %H:%M:%S',
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)
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if args.logfile:
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fh = logging.handlers.WatchedFileHandler(args.logfile)
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fh.setFormatter(fmt)
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log.addHandler(fh)
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if not args.daemonize:
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sh = logging.StreamHandler()
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sh.setFormatter(fmt)
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log.addHandler(sh)
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try:
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pd = Pathod(
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(args.address, args.port),
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craftanchor=args.craftanchor,
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ssl=args.ssl,
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ssloptions=ssloptions,
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staticdir=args.staticdir,
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anchors=args.anchors,
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sizelimit=args.sizelimit,
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noweb=args.noweb,
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nocraft=args.nocraft,
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noapi=args.noapi,
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nohang=args.nohang,
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timeout=args.timeout,
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logreq=args.logreq,
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logresp=args.logresp,
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hexdump=args.hexdump,
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http2_framedump=args.http2_framedump,
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explain=args.explain,
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webdebug=args.webdebug
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)
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except PathodError as v:
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print >> sys.stderr, "Error: %s" % v
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sys.exit(1)
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except language.FileAccessDenied as v:
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print >> sys.stderr, "Error: %s" % v
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if args.daemonize:
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utils.daemonize()
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try:
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print "%s listening on %s:%s" % (
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version.NAMEVERSION,
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pd.address.host,
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pd.address.port
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)
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pd.serve_forever()
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except KeyboardInterrupt:
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pass
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