mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-23 08:11:00 +00:00
465 lines
18 KiB
Python
465 lines
18 KiB
Python
# Copyright (C) 2012 Aldo Cortesi
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import sys, os, string, socket, time
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import shutil, tempfile, threading
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import optparse, SocketServer
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from OpenSSL import SSL
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from netlib import odict, tcp, http, wsgi, certutils
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import utils, flow, version, platform
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class ProxyError(Exception):
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def __init__(self, code, msg):
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self.code, self.msg = code, msg
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def __str__(self):
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return "ProxyError(%s, %s)"%(self.code, self.msg)
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class ProxyConfig:
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def __init__(self, certfile = None, cacert = None, clientcerts = None, cert_wait_time=0, upstream_cert=False, body_size_limit = None, reverse_proxy=None, transparent_proxy=None):
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assert not (reverse_proxy and transparent_proxy)
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self.certfile = certfile
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self.cacert = cacert
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self.clientcerts = clientcerts
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self.certdir = None
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self.cert_wait_time = cert_wait_time
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self.upstream_cert = upstream_cert
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self.body_size_limit = body_size_limit
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self.reverse_proxy = reverse_proxy
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self.transparent_proxy = transparent_proxy
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class RequestReplayThread(threading.Thread):
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def __init__(self, config, flow, masterq):
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self.config, self.flow, self.masterq = config, flow, masterq
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threading.Thread.__init__(self)
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def run(self):
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try:
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r = self.flow.request
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server = ServerConnection(self.config, r.host, r.port)
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server.connect(r.scheme)
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server.send(r)
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httpversion, code, msg, headers, content = http.read_response(
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server.rfile, r.method, self.config.body_size_limit
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)
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response = flow.Response(
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self.flow.request, httpversion, code, msg, headers, content, server.cert
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)
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response._send(self.masterq)
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except (ProxyError, http.HttpError), v:
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err = flow.Error(self.flow.request, v.msg)
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err._send(self.masterq)
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except tcp.NetLibError, v:
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raise ProxyError(502, v)
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class ServerConnection(tcp.TCPClient):
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def __init__(self, config, host, port):
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tcp.TCPClient.__init__(self, host, port)
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self.config = config
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self.requestcount = 0
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def connect(self, scheme):
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tcp.TCPClient.connect(self)
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if scheme == "https":
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clientcert = None
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if self.config.clientcerts:
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path = os.path.join(self.config.clientcerts, self.host) + ".pem"
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if os.path.exists(clientcert):
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clientcert = path
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self.convert_to_ssl(clientcert=clientcert)
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def send(self, request):
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self.requestcount += 1
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try:
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d = request._assemble()
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if not d:
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raise ProxyError(502, "Incomplete request could not not be readied for transmission.")
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self.wfile.write(d)
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self.wfile.flush()
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except socket.error, err:
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raise ProxyError(502, 'Error sending data to "%s": %s' % (request.host, err))
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def terminate(self):
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try:
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if not self.wfile.closed:
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self.wfile.flush()
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self.connection.close()
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except IOError:
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pass
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class ProxyHandler(tcp.BaseHandler):
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def __init__(self, config, connection, client_address, server, q):
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self.mqueue = q
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self.config = config
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self.server_conn = None
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self.proxy_connect_state = None
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self.sni = None
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tcp.BaseHandler.__init__(self, connection, client_address, server)
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def handle(self):
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cc = flow.ClientConnect(self.client_address)
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cc._send(self.mqueue)
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while self.handle_request(cc) and not cc.close:
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pass
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cc.close = True
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cd = flow.ClientDisconnect(cc)
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cd._send(self.mqueue)
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def server_connect(self, scheme, host, port):
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sc = self.server_conn
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if sc and (host, port) != (sc.host, sc.port):
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sc.terminate()
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self.server_conn = None
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if not self.server_conn:
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try:
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self.server_conn = ServerConnection(self.config, host, port)
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self.server_conn.connect(scheme)
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except tcp.NetLibError, v:
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raise ProxyError(502, v)
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def handle_request(self, cc):
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try:
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request, err = None, None
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request = self.read_request(cc)
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if request is None:
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return
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cc.requestcount += 1
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app = self.server.apps.get(request)
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if app:
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app.serve(request, self.wfile)
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else:
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request = request._send(self.mqueue)
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if request is None:
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return
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if isinstance(request, flow.Response):
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response = request
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request = False
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response = response._send(self.mqueue)
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else:
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if self.config.reverse_proxy:
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scheme, host, port = self.config.reverse_proxy
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else:
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scheme, host, port = request.scheme, request.host, request.port
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self.server_connect(scheme, host, port)
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self.server_conn.send(request)
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httpversion, code, msg, headers, content = http.read_response(
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self.server_conn.rfile,
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request.method,
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self.config.body_size_limit
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)
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response = flow.Response(
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request, httpversion, code, msg, headers, content, self.server_conn.cert
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)
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response = response._send(self.mqueue)
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if response is None:
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self.server_conn.terminate()
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if response is None:
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return
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self.send_response(response)
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if http.request_connection_close(request.httpversion, request.headers):
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return
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# We could keep the client connection when the server
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# connection needs to go away. However, we want to mimic
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# behaviour as closely as possible to the client, so we
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# disconnect.
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if http.response_connection_close(response.httpversion, response.headers):
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return
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except IOError, v:
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cc.connection_error = v
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except (ProxyError, http.HttpError), e:
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cc.connection_error = "%s: %s"%(e.code, e.msg)
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if request:
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err = flow.Error(request, e.msg)
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err._send(self.mqueue)
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self.send_error(e.code, e.msg)
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else:
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return True
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def find_cert(self, host, port, sni):
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if self.config.certfile:
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return self.config.certfile
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else:
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sans = []
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if self.config.upstream_cert:
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cert = certutils.get_remote_cert(host, port, sni)
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sans = cert.altnames
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host = cert.cn
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ret = certutils.dummy_cert(self.config.certdir, self.config.cacert, host, sans)
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time.sleep(self.config.cert_wait_time)
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if not ret:
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raise ProxyError(502, "mitmproxy: Unable to generate dummy cert.")
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return ret
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def get_line(self, fp):
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"""
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Get a line, possibly preceded by a blank.
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"""
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line = fp.readline()
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if line == "\r\n" or line == "\n": # Possible leftover from previous message
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line = fp.readline()
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return line
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def handle_sni(self, conn):
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self.sni = conn.get_servername()
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def read_request(self, client_conn):
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if self.config.transparent_proxy:
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host, port = self.config.transparent_proxy["resolver"].original_addr(self.connection)
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if not self.ssl_established and (port in self.config.transparent_proxy["sslports"]):
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scheme = "https"
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certfile = self.find_cert(host, port, None)
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self.convert_to_ssl(certfile, self.config.certfile or self.config.cacert)
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else:
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scheme = "http"
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host = self.sni or host
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line = self.get_line(self.rfile)
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if line == "":
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return None
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r = http.parse_init_http(line)
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if not r:
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raise ProxyError(400, "Bad HTTP request line: %s"%line)
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method, path, httpversion = r
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headers = http.read_headers(self.rfile)
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content = http.read_http_body_request(
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self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
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)
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return flow.Request(client_conn, httpversion, host, port, scheme, method, path, headers, content)
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elif self.config.reverse_proxy:
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line = self.get_line(self.rfile)
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if line == "":
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return None
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scheme, host, port = self.config.reverse_proxy
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r = http.parse_init_http(line)
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if not r:
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raise ProxyError(400, "Bad HTTP request line: %s"%line)
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method, path, httpversion = r
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headers = http.read_headers(self.rfile)
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content = http.read_http_body_request(
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self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
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)
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return flow.Request(client_conn, httpversion, host, port, "http", method, path, headers, content)
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else:
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line = self.get_line(self.rfile)
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if line == "":
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return None
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if line.startswith("CONNECT"):
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r = http.parse_init_connect(line)
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if not r:
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raise ProxyError(400, "Bad HTTP request line: %s"%line)
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host, port, httpversion = r
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# FIXME: Discard additional headers sent to the proxy. Should I expose
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# these to users?
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while 1:
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d = self.rfile.readline()
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if d == '\r\n' or d == '\n':
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break
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self.wfile.write(
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'HTTP/1.1 200 Connection established\r\n' +
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('Proxy-agent: %s\r\n'%version.NAMEVERSION) +
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'\r\n'
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)
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self.wfile.flush()
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certfile = self.find_cert(host, port, None)
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self.convert_to_ssl(certfile, self.config.certfile or self.config.cacert)
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self.proxy_connect_state = (host, port, httpversion)
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line = self.rfile.readline(line)
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if self.proxy_connect_state:
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host, port, httpversion = self.proxy_connect_state
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r = http.parse_init_http(line)
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if not r:
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raise ProxyError(400, "Bad HTTP request line: %s"%line)
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method, path, httpversion = r
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headers = http.read_headers(self.rfile)
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content = http.read_http_body_request(
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self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
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)
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return flow.Request(client_conn, httpversion, host, port, "https", method, path, headers, content)
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else:
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r = http.parse_init_proxy(line)
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if not r:
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raise ProxyError(400, "Bad HTTP request line: %s"%line)
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method, scheme, host, port, path, httpversion = http.parse_init_proxy(line)
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headers = http.read_headers(self.rfile)
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content = http.read_http_body_request(
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self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
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)
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return flow.Request(client_conn, httpversion, host, port, scheme, method, path, headers, content)
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def send_response(self, response):
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d = response._assemble()
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if not d:
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raise ProxyError(502, "Incomplete response could not not be readied for transmission.")
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self.wfile.write(d)
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self.wfile.flush()
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def send_error(self, code, body):
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try:
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import BaseHTTPServer
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response = BaseHTTPServer.BaseHTTPRequestHandler.responses[code][0]
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self.wfile.write("HTTP/1.1 %s %s\r\n" % (code, response))
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self.wfile.write("Server: %s\r\n"%version.NAMEVERSION)
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self.wfile.write("Connection: close\r\n")
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self.wfile.write("Content-type: text/html\r\n")
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self.wfile.write("\r\n")
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self.wfile.write('<html><head>\n<title>%d %s</title>\n</head>\n'
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'<body>\n%s\n</body>\n</html>' % (code, response, body))
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self.wfile.flush()
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except:
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pass
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class ProxyServerError(Exception): pass
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class ProxyServer(tcp.TCPServer):
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allow_reuse_address = True
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bound = True
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def __init__(self, config, port, address=''):
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"""
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Raises ProxyServerError if there's a startup problem.
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"""
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self.config, self.port, self.address = config, port, address
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try:
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tcp.TCPServer.__init__(self, (address, port))
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except socket.error, v:
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raise ProxyServerError('Error starting proxy server: ' + v.strerror)
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self.masterq = None
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self.certdir = tempfile.mkdtemp(prefix="mitmproxy")
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config.certdir = self.certdir
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self.apps = AppRegistry()
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def start_slave(self, klass, masterq):
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slave = klass(masterq, self)
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slave.start()
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def set_mqueue(self, q):
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self.masterq = q
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def handle_connection(self, request, client_address):
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h = ProxyHandler(self.config, request, client_address, self, self.masterq)
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h.handle()
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h.finish()
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def handle_shutdown(self):
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try:
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shutil.rmtree(self.certdir)
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except OSError:
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pass
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class AppRegistry:
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def __init__(self):
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self.apps = {}
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def add(self, app, domain, port):
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"""
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Add a WSGI app to the registry, to be served for requests to the
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specified domain, on the specified port.
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"""
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self.apps[(domain, port)] = wsgi.WSGIAdaptor(app, domain, port, version.NAMEVERSION)
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def get(self, request):
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"""
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Returns an WSGIAdaptor instance if request matches an app, or None.
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"""
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return self.apps.get((request.host, request.port), None)
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class DummyServer:
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bound = False
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def __init__(self, config):
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self.config = config
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def start_slave(self, klass, masterq):
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pass
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def shutdown(self):
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pass
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# Command-line utils
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def certificate_option_group(parser):
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group = optparse.OptionGroup(parser, "SSL")
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group.add_option(
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"--cert", action="store",
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type = "str", dest="cert", default=None,
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help = "User-created SSL certificate file."
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)
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group.add_option(
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"--client-certs", action="store",
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type = "str", dest = "clientcerts", default=None,
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help = "Client certificate directory."
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)
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parser.add_option_group(group)
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TRANSPARENT_SSL_PORTS = [443, 8443]
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def process_proxy_options(parser, options):
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if options.cert:
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options.cert = os.path.expanduser(options.cert)
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if not os.path.exists(options.cert):
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parser.error("Manually created certificate does not exist: %s"%options.cert)
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cacert = os.path.join(options.confdir, "mitmproxy-ca.pem")
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cacert = os.path.expanduser(cacert)
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if not os.path.exists(cacert):
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certutils.dummy_ca(cacert)
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if getattr(options, "cache", None) is not None:
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options.cache = os.path.expanduser(options.cache)
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body_size_limit = utils.parse_size(options.body_size_limit)
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if options.reverse_proxy and options.transparent_proxy:
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parser.errror("Can't set both reverse proxy and transparent proxy.")
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if options.transparent_proxy:
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if not platform.resolver:
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parser.error("Transparent mode not supported on this platform.")
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trans = dict(
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resolver = platform.resolver,
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sslports = TRANSPARENT_SSL_PORTS
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)
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else:
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trans = None
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if options.reverse_proxy:
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rp = utils.parse_proxy_spec(options.reverse_proxy)
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if not rp:
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parser.error("Invalid reverse proxy specification: %s"%options.reverse_proxy)
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else:
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rp = None
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if options.clientcerts:
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options.clientcerts = os.path.expanduser(options.clientcerts)
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if not os.path.exists(options.clientcerts) or not os.path.isdir(options.clientcerts):
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parser.error("Client certificate directory does not exist or is not a directory: %s"%options.clientcerts)
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return ProxyConfig(
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certfile = options.cert,
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cacert = cacert,
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clientcerts = options.clientcerts,
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cert_wait_time = options.cert_wait_time,
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body_size_limit = body_size_limit,
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upstream_cert = options.upstream_cert,
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reverse_proxy = rp,
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transparent_proxy = trans
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)
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