mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-27 02:24:18 +00:00
542 lines
20 KiB
Python
542 lines
20 KiB
Python
# Copyright (C) 2012 Aldo Cortesi
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# 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
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
import sys, os, string, socket, time
|
|
import shutil, tempfile, threading
|
|
import SocketServer
|
|
from OpenSSL import SSL
|
|
from netlib import odict, tcp, http, wsgi, certutils, http_status
|
|
import utils, flow, version, platform, controller
|
|
|
|
|
|
class ProxyError(Exception):
|
|
def __init__(self, code, msg):
|
|
self.code, self.msg = code, msg
|
|
|
|
def __str__(self):
|
|
return "ProxyError(%s, %s)"%(self.code, self.msg)
|
|
|
|
|
|
class Log(controller.Msg):
|
|
def __init__(self, msg):
|
|
controller.Msg.__init__(self)
|
|
self.msg = msg
|
|
|
|
|
|
|
|
class ProxyConfig:
|
|
def __init__(self, certfile = None, cacert = None, clientcerts = None, cert_wait_time=0, no_upstream_cert=False, body_size_limit = None, reverse_proxy=None, transparent_proxy=None, certdir = None):
|
|
assert not (reverse_proxy and transparent_proxy)
|
|
self.certfile = certfile
|
|
self.cacert = cacert
|
|
self.clientcerts = clientcerts
|
|
self.certdir = certdir
|
|
self.cert_wait_time = cert_wait_time
|
|
self.no_upstream_cert = no_upstream_cert
|
|
self.body_size_limit = body_size_limit
|
|
self.reverse_proxy = reverse_proxy
|
|
self.transparent_proxy = transparent_proxy
|
|
|
|
|
|
class RequestReplayThread(threading.Thread):
|
|
def __init__(self, config, flow, masterq):
|
|
self.config, self.flow, self.masterq = config, flow, masterq
|
|
threading.Thread.__init__(self)
|
|
|
|
def run(self):
|
|
try:
|
|
r = self.flow.request
|
|
server = ServerConnection(self.config, r.host, r.port)
|
|
server.connect(r.scheme)
|
|
server.send(r)
|
|
httpversion, code, msg, headers, content = http.read_response(
|
|
server.rfile, r.method, self.config.body_size_limit
|
|
)
|
|
response = flow.Response(
|
|
self.flow.request, httpversion, code, msg, headers, content, server.cert
|
|
)
|
|
response._send(self.masterq)
|
|
except (ProxyError, http.HttpError, tcp.NetLibError), v:
|
|
err = flow.Error(self.flow.request, str(v))
|
|
err._send(self.masterq)
|
|
|
|
|
|
class ServerConnection(tcp.TCPClient):
|
|
def __init__(self, config, host, port):
|
|
tcp.TCPClient.__init__(self, host, port)
|
|
self.config = config
|
|
self.requestcount = 0
|
|
|
|
def connect(self, scheme):
|
|
tcp.TCPClient.connect(self)
|
|
if scheme == "https":
|
|
clientcert = None
|
|
if self.config.clientcerts:
|
|
path = os.path.join(self.config.clientcerts, self.host) + ".pem"
|
|
if os.path.exists(clientcert):
|
|
clientcert = path
|
|
try:
|
|
self.convert_to_ssl(clientcert=clientcert, sni=self.host)
|
|
except tcp.NetLibError, v:
|
|
raise ProxyError(400, str(v))
|
|
|
|
def send(self, request):
|
|
self.requestcount += 1
|
|
try:
|
|
d = request._assemble()
|
|
if not d:
|
|
raise ProxyError(502, "Incomplete request could not not be readied for transmission.")
|
|
self.wfile.write(d)
|
|
self.wfile.flush()
|
|
except socket.error, err:
|
|
raise ProxyError(502, 'Error sending data to "%s": %s' % (request.host, err))
|
|
|
|
def terminate(self):
|
|
try:
|
|
if not self.wfile.closed:
|
|
self.wfile.flush()
|
|
self.connection.close()
|
|
except IOError:
|
|
pass
|
|
|
|
|
|
class ProxyHandler(tcp.BaseHandler):
|
|
def __init__(self, config, connection, client_address, server, mqueue, server_version):
|
|
self.mqueue, self.server_version = mqueue, server_version
|
|
self.config = config
|
|
self.server_conn = None
|
|
self.proxy_connect_state = None
|
|
self.sni = None
|
|
tcp.BaseHandler.__init__(self, connection, client_address, server)
|
|
|
|
def handle(self):
|
|
cc = flow.ClientConnect(self.client_address)
|
|
self.log(cc, "connect")
|
|
cc._send(self.mqueue)
|
|
while self.handle_request(cc) and not cc.close:
|
|
pass
|
|
cc.close = True
|
|
cd = flow.ClientDisconnect(cc)
|
|
|
|
self.log(
|
|
cc, "disconnect",
|
|
[
|
|
"handled %s requests"%cc.requestcount]
|
|
)
|
|
cd._send(self.mqueue)
|
|
|
|
def server_connect(self, scheme, host, port):
|
|
sc = self.server_conn
|
|
if sc and (host, port) != (sc.host, sc.port):
|
|
sc.terminate()
|
|
self.server_conn = None
|
|
if not self.server_conn:
|
|
try:
|
|
self.server_conn = ServerConnection(self.config, host, port)
|
|
self.server_conn.connect(scheme)
|
|
except tcp.NetLibError, v:
|
|
raise ProxyError(502, v)
|
|
|
|
def handle_request(self, cc):
|
|
try:
|
|
request, err = None, None
|
|
request = self.read_request(cc)
|
|
if request is None:
|
|
return
|
|
cc.requestcount += 1
|
|
|
|
app = self.server.apps.get(request)
|
|
if app:
|
|
err = app.serve(request, self.wfile)
|
|
if err:
|
|
self.log(cc, "Error in wsgi app.", err.split("\n"))
|
|
return
|
|
else:
|
|
request = request._send(self.mqueue)
|
|
if request is None:
|
|
return
|
|
|
|
if isinstance(request, flow.Response):
|
|
response = request
|
|
request = False
|
|
response = response._send(self.mqueue)
|
|
else:
|
|
if self.config.reverse_proxy:
|
|
scheme, host, port = self.config.reverse_proxy
|
|
else:
|
|
scheme, host, port = request.scheme, request.host, request.port
|
|
self.server_connect(scheme, host, port)
|
|
self.server_conn.send(request)
|
|
httpversion, code, msg, headers, content = http.read_response(
|
|
self.server_conn.rfile,
|
|
request.method,
|
|
self.config.body_size_limit
|
|
)
|
|
response = flow.Response(
|
|
request, httpversion, code, msg, headers, content, self.server_conn.cert
|
|
)
|
|
response = response._send(self.mqueue)
|
|
if response is None:
|
|
self.server_conn.terminate()
|
|
if response is None:
|
|
return
|
|
self.send_response(response)
|
|
if request and http.request_connection_close(request.httpversion, request.headers):
|
|
return
|
|
# We could keep the client connection when the server
|
|
# connection needs to go away. However, we want to mimic
|
|
# behaviour as closely as possible to the client, so we
|
|
# disconnect.
|
|
if http.response_connection_close(response.httpversion, response.headers):
|
|
return
|
|
except (IOError, ProxyError, http.HttpError, tcp.NetLibDisconnect), e:
|
|
if hasattr(e, "code"):
|
|
cc.error = "%s: %s"%(e.code, e.msg)
|
|
else:
|
|
cc.error = str(e)
|
|
|
|
if request:
|
|
err = flow.Error(request, cc.error)
|
|
err._send(self.mqueue)
|
|
self.log(
|
|
cc, cc.error,
|
|
["url: %s"%request.get_url()]
|
|
)
|
|
else:
|
|
self.log(cc, cc.error)
|
|
|
|
if isinstance(e, ProxyError):
|
|
self.send_error(e.code, e.msg)
|
|
else:
|
|
return True
|
|
|
|
def log(self, cc, msg, subs=()):
|
|
msg = [
|
|
"%s:%s: "%cc.address + msg
|
|
]
|
|
for i in subs:
|
|
msg.append(" -> "+i)
|
|
msg = "\n".join(msg)
|
|
l = Log(msg)
|
|
l._send(self.mqueue)
|
|
|
|
def find_cert(self, host, port, sni):
|
|
if self.config.certfile:
|
|
return self.config.certfile
|
|
else:
|
|
sans = []
|
|
if not self.config.no_upstream_cert:
|
|
try:
|
|
cert = certutils.get_remote_cert(host, port, sni)
|
|
except tcp.NetLibError, v:
|
|
raise ProxyError(502, "Unable to get remote cert: %s"%str(v))
|
|
sans = cert.altnames
|
|
host = cert.cn.decode("utf8").encode("idna")
|
|
ret = certutils.dummy_cert(self.config.certdir, self.config.cacert, host, sans)
|
|
time.sleep(self.config.cert_wait_time)
|
|
if not ret:
|
|
raise ProxyError(502, "mitmproxy: Unable to generate dummy cert.")
|
|
return ret
|
|
|
|
def get_line(self, fp):
|
|
"""
|
|
Get a line, possibly preceded by a blank.
|
|
"""
|
|
line = fp.readline()
|
|
if line == "\r\n" or line == "\n": # Possible leftover from previous message
|
|
line = fp.readline()
|
|
return line
|
|
|
|
def handle_sni(self, conn):
|
|
sn = conn.get_servername()
|
|
if sn:
|
|
self.sni = sn.decode("utf8").encode("idna")
|
|
|
|
def read_request(self, client_conn):
|
|
if self.config.transparent_proxy:
|
|
host, port = self.config.transparent_proxy["resolver"].original_addr(self.connection)
|
|
if not self.ssl_established and (port in self.config.transparent_proxy["sslports"]):
|
|
scheme = "https"
|
|
certfile = self.find_cert(host, port, None)
|
|
try:
|
|
self.convert_to_ssl(certfile, self.config.certfile or self.config.cacert)
|
|
except tcp.NetLibError, v:
|
|
raise ProxyError(400, str(v))
|
|
else:
|
|
scheme = "http"
|
|
host = self.sni or host
|
|
line = self.get_line(self.rfile)
|
|
if line == "":
|
|
return None
|
|
r = http.parse_init_http(line)
|
|
if not r:
|
|
raise ProxyError(400, "Bad HTTP request line: %s"%repr(line))
|
|
method, path, httpversion = r
|
|
headers = http.read_headers(self.rfile)
|
|
if headers is None:
|
|
raise ProxyError(400, "Invalid headers")
|
|
content = http.read_http_body_request(
|
|
self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
|
|
)
|
|
return flow.Request(client_conn, httpversion, host, port, scheme, method, path, headers, content)
|
|
elif self.config.reverse_proxy:
|
|
line = self.get_line(self.rfile)
|
|
if line == "":
|
|
return None
|
|
scheme, host, port = self.config.reverse_proxy
|
|
r = http.parse_init_http(line)
|
|
if not r:
|
|
raise ProxyError(400, "Bad HTTP request line: %s"%repr(line))
|
|
method, path, httpversion = r
|
|
headers = http.read_headers(self.rfile)
|
|
if headers is None:
|
|
raise ProxyError(400, "Invalid headers")
|
|
content = http.read_http_body_request(
|
|
self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
|
|
)
|
|
return flow.Request(client_conn, httpversion, host, port, "http", method, path, headers, content)
|
|
else:
|
|
line = self.get_line(self.rfile)
|
|
if line == "":
|
|
return None
|
|
if line.startswith("CONNECT"):
|
|
r = http.parse_init_connect(line)
|
|
if not r:
|
|
raise ProxyError(400, "Bad HTTP request line: %s"%repr(line))
|
|
host, port, httpversion = r
|
|
# FIXME: Discard additional headers sent to the proxy. Should I expose
|
|
# these to users?
|
|
while 1:
|
|
d = self.rfile.readline()
|
|
if d == '\r\n' or d == '\n':
|
|
break
|
|
self.wfile.write(
|
|
'HTTP/1.1 200 Connection established\r\n' +
|
|
('Proxy-agent: %s\r\n'%self.server_version) +
|
|
'\r\n'
|
|
)
|
|
self.wfile.flush()
|
|
certfile = self.find_cert(host, port, None)
|
|
try:
|
|
self.convert_to_ssl(certfile, self.config.certfile or self.config.cacert)
|
|
except tcp.NetLibError, v:
|
|
raise ProxyError(400, str(v))
|
|
self.proxy_connect_state = (host, port, httpversion)
|
|
line = self.rfile.readline(line)
|
|
if self.proxy_connect_state:
|
|
host, port, httpversion = self.proxy_connect_state
|
|
r = http.parse_init_http(line)
|
|
if not r:
|
|
raise ProxyError(400, "Bad HTTP request line: %s"%repr(line))
|
|
method, path, httpversion = r
|
|
headers = http.read_headers(self.rfile)
|
|
if headers is None:
|
|
raise ProxyError(400, "Invalid headers")
|
|
content = http.read_http_body_request(
|
|
self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
|
|
)
|
|
return flow.Request(client_conn, httpversion, host, port, "https", method, path, headers, content)
|
|
else:
|
|
r = http.parse_init_proxy(line)
|
|
if not r:
|
|
raise ProxyError(400, "Bad HTTP request line: %s"%repr(line))
|
|
method, scheme, host, port, path, httpversion = http.parse_init_proxy(line)
|
|
headers = http.read_headers(self.rfile)
|
|
if headers is None:
|
|
raise ProxyError(400, "Invalid headers")
|
|
content = http.read_http_body_request(
|
|
self.rfile, self.wfile, headers, httpversion, self.config.body_size_limit
|
|
)
|
|
return flow.Request(client_conn, httpversion, host, port, scheme, method, path, headers, content)
|
|
|
|
def send_response(self, response):
|
|
d = response._assemble()
|
|
if not d:
|
|
raise ProxyError(502, "Incomplete response could not not be readied for transmission.")
|
|
self.wfile.write(d)
|
|
self.wfile.flush()
|
|
|
|
def send_error(self, code, body):
|
|
try:
|
|
response = http_status.RESPONSES.get(code, "Unknown")
|
|
self.wfile.write("HTTP/1.1 %s %s\r\n" % (code, response))
|
|
self.wfile.write("Server: %s\r\n"%self.server_version)
|
|
self.wfile.write("Connection: close\r\n")
|
|
self.wfile.write("Content-type: text/html\r\n")
|
|
self.wfile.write("\r\n")
|
|
self.wfile.write('<html><head>\n<title>%d %s</title>\n</head>\n'
|
|
'<body>\n%s\n</body>\n</html>' % (code, response, body))
|
|
self.wfile.flush()
|
|
except:
|
|
pass
|
|
|
|
|
|
class ProxyServerError(Exception): pass
|
|
|
|
|
|
class ProxyServer(tcp.TCPServer):
|
|
allow_reuse_address = True
|
|
bound = True
|
|
def __init__(self, config, port, address='', server_version=version.NAMEVERSION):
|
|
"""
|
|
Raises ProxyServerError if there's a startup problem.
|
|
"""
|
|
self.config, self.port, self.address = config, port, address
|
|
self.server_version = server_version
|
|
try:
|
|
tcp.TCPServer.__init__(self, (address, port))
|
|
except socket.error, v:
|
|
raise ProxyServerError('Error starting proxy server: ' + v.strerror)
|
|
self.masterq = None
|
|
if config.certdir:
|
|
self.certdir = config.certdir
|
|
self.remove_certdir = False
|
|
else:
|
|
self.certdir = tempfile.mkdtemp(prefix="mitmproxy")
|
|
config.certdir = self.certdir
|
|
self.remove_certdir = True
|
|
self.apps = AppRegistry()
|
|
|
|
def start_slave(self, klass, masterq):
|
|
slave = klass(masterq, self)
|
|
slave.start()
|
|
|
|
def set_mqueue(self, q):
|
|
self.masterq = q
|
|
|
|
def handle_connection(self, request, client_address):
|
|
h = ProxyHandler(self.config, request, client_address, self, self.masterq, self.server_version)
|
|
h.handle()
|
|
h.finish()
|
|
|
|
def handle_shutdown(self):
|
|
try:
|
|
if self.remove_certdir:
|
|
shutil.rmtree(self.certdir)
|
|
except OSError:
|
|
pass
|
|
|
|
|
|
class AppRegistry:
|
|
def __init__(self):
|
|
self.apps = {}
|
|
|
|
def add(self, app, domain, port):
|
|
"""
|
|
Add a WSGI app to the registry, to be served for requests to the
|
|
specified domain, on the specified port.
|
|
"""
|
|
self.apps[(domain, port)] = wsgi.WSGIAdaptor(app, domain, port, version.NAMEVERSION)
|
|
|
|
def get(self, request):
|
|
"""
|
|
Returns an WSGIAdaptor instance if request matches an app, or None.
|
|
"""
|
|
if (request.host, request.port) in self.apps:
|
|
return self.apps[(request.host, request.port)]
|
|
if "host" in request.headers:
|
|
host = request.headers["host"][0]
|
|
return self.apps.get((host, request.port), None)
|
|
|
|
|
|
class DummyServer:
|
|
bound = False
|
|
def __init__(self, config):
|
|
self.config = config
|
|
|
|
def start_slave(self, klass, masterq):
|
|
pass
|
|
|
|
def shutdown(self):
|
|
pass
|
|
|
|
|
|
# Command-line utils
|
|
def certificate_option_group(parser):
|
|
group = parser.add_argument_group("SSL")
|
|
group.add_argument(
|
|
"--cert", action="store",
|
|
type = str, dest="cert", default=None,
|
|
help = "User-created SSL certificate file."
|
|
)
|
|
group.add_argument(
|
|
"--client-certs", action="store",
|
|
type = str, dest = "clientcerts", default=None,
|
|
help = "Client certificate directory."
|
|
)
|
|
group.add_argument(
|
|
"--dummy-certs", action="store",
|
|
type = str, dest = "certdir", default=None,
|
|
help = "Generated dummy certs directory."
|
|
)
|
|
|
|
|
|
TRANSPARENT_SSL_PORTS = [443, 8443]
|
|
|
|
def process_proxy_options(parser, options):
|
|
if options.cert:
|
|
options.cert = os.path.expanduser(options.cert)
|
|
if not os.path.exists(options.cert):
|
|
parser.error("Manually created certificate does not exist: %s"%options.cert)
|
|
|
|
cacert = os.path.join(options.confdir, "mitmproxy-ca.pem")
|
|
cacert = os.path.expanduser(cacert)
|
|
if not os.path.exists(cacert):
|
|
certutils.dummy_ca(cacert)
|
|
if getattr(options, "cache", None) is not None:
|
|
options.cache = os.path.expanduser(options.cache)
|
|
body_size_limit = utils.parse_size(options.body_size_limit)
|
|
|
|
if options.reverse_proxy and options.transparent_proxy:
|
|
parser.errror("Can't set both reverse proxy and transparent proxy.")
|
|
|
|
if options.transparent_proxy:
|
|
if not platform.resolver:
|
|
parser.error("Transparent mode not supported on this platform.")
|
|
trans = dict(
|
|
resolver = platform.resolver,
|
|
sslports = TRANSPARENT_SSL_PORTS
|
|
)
|
|
else:
|
|
trans = None
|
|
|
|
if options.reverse_proxy:
|
|
rp = utils.parse_proxy_spec(options.reverse_proxy)
|
|
if not rp:
|
|
parser.error("Invalid reverse proxy specification: %s"%options.reverse_proxy)
|
|
else:
|
|
rp = None
|
|
|
|
if options.clientcerts:
|
|
options.clientcerts = os.path.expanduser(options.clientcerts)
|
|
if not os.path.exists(options.clientcerts) or not os.path.isdir(options.clientcerts):
|
|
parser.error("Client certificate directory does not exist or is not a directory: %s"%options.clientcerts)
|
|
|
|
if options.certdir:
|
|
options.certdir = os.path.expanduser(options.certdir)
|
|
if not os.path.exists(options.certdir) or not os.path.isdir(options.certdir):
|
|
parser.error("Dummy cert directory does not exist or is not a directory: %s"%options.certdir)
|
|
|
|
return ProxyConfig(
|
|
certfile = options.cert,
|
|
cacert = cacert,
|
|
clientcerts = options.clientcerts,
|
|
cert_wait_time = options.cert_wait_time,
|
|
body_size_limit = body_size_limit,
|
|
no_upstream_cert = options.no_upstream_cert,
|
|
reverse_proxy = rp,
|
|
transparent_proxy = trans,
|
|
certdir = options.certdir
|
|
)
|