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accesser.py
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accesser.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Accesser
# Copyright (C) 2018 URenko
# 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/>.
server_address = ('127.0.0.1', 443)
import argparse
import logging
import configparser
import os, re, sys
import socket, ssl
import select
from socketserver import *
sys.path.append(os.path.dirname(__file__))
from utils import certmanager as cm
from utils import importca
from http import HTTPStatus
import urllib.error
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s %(levelname)-8s L%(lineno)-3s %(message)s',
datefmt='%Y-%m-%d %H:%M:%S', filemode='a+')
_MAXLINE = 65536
_MAXHEADERS = 100
class ProxyHandler(StreamRequestHandler):
raw_request = b''
remote_ip = None
def send_error(self, code, message=None, explain=None):
#TODO
pass
def parse_host(self):
try:
raw_requestline = self.rfile.readline(_MAXLINE + 1)
self.raw_request += raw_requestline
if len(raw_requestline) > _MAXLINE:
logging.error(HTTPStatus.REQUEST_URI_TOO_LONG)
self.send_error(HTTPStatus.REQUEST_URI_TOO_LONG)
if not raw_requestline:
return False
logging.debug(raw_requestline.strip().decode('iso-8859-1'))
headers = []
while True:
raw_requestline = self.rfile.readline(_MAXLINE + 1)
self.raw_request += raw_requestline
if len(raw_requestline) > _MAXLINE:
return False
headers.append(raw_requestline)
if len(headers) > _MAXHEADERS:
return False
if raw_requestline in (b'\r\n', b'\n', b''):
break
header, value = raw_requestline.strip().split(b': ', maxsplit=1)
if header == b'Host':
self.host = value.decode('iso-8859-1')
self.remote_ip = rhosts[self.host]
logging.debug('remote: {} {}'.format(self.host, self.remote_ip))
if self.remote_ip:
return True
else:
return False
except socket.timeout as e:
logging.error("Request timed out: {}".format(e))
return False
def forward(self, sock, remote):
try:
fdset = [sock, remote]
while True:
r, w, e = select.select(fdset, [], [])
if sock in r:
data = sock.recv(32768)
if len(data) <= 0:
break
remote.sendall(data)
if remote in r:
data = remote.recv(32768)
if len(data) <= 0:
break
sock.sendall(data)
except socket.error as e:
logging.warning('Forward: %s' % e)
finally:
sock.close()
remote.close()
def handle(self):
if not self.parse_host():
return
self.remote_sock = socket.create_connection((self.remote_ip, 443))
context = ssl.create_default_context()
context.check_hostname = False
self.remote_sock = context.wrap_socket(self.remote_sock)
cert = self.remote_sock.getpeercert()
if check_hostname:
ssl.match_hostname(cert, self.host)
self.remote_sock.sendall(self.raw_request)
self.forward(self.request, self.remote_sock)
if __name__ == '__main__':
print("Accesser Copyright (C) 2018 URenko")
parser = argparse.ArgumentParser()
parser.add_argument('-r', '--renewca', help='renew cert', action="store_true")
parser.add_argument('-rr', '--root', help='create root cert', action="store_true")
args = parser.parse_args()
config = configparser.ConfigParser()
config.read('setting.ini')
hosts = re.findall(r'(\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})\s+(\S+)', open('hosts').read())
rhosts = {k:v for v,k in hosts}
check_hostname = int(config['setting']['check_hostname'])
now_dn_st_mtime = os.stat('domains.txt').st_mtime
domainsupdate = False
if float(config['internal']['dn_st_mtime']) < now_dn_st_mtime:
if sys.platform.startswith('win'):
domainsupdate = True
from utils import win32elevate
if not win32elevate.areAdminRightsElevated():
win32elevate.elevateAdminRun(' '.join(sys.argv), reattachConsole=False)
sys.exit(0)
logging.info('Updating HOSTS...')
with open(r"C:\Windows\System32\drivers\etc\hosts") as f:
host_content = f.read()
with open('domains.txt') as f:
for domain in f:
if not re.search(r'(\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})(?P<oth>\s+'+domain.strip()+')', host_content):
host_content += '\n127.0.0.1\t'+domain.strip()
host_content = re.sub(r'(\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})(?P<oth>\s+'+domain.strip()+')',r'127.0.0.1\g<oth>',host_content)
with open(r"C:\Windows\System32\drivers\etc\hosts", 'w') as f:
f.write(host_content)
config['internal']['dn_st_mtime'] = str(now_dn_st_mtime)
with open('setting.ini', 'w') as f:
config.write(f)
logging.info('Updating fin')
else:
logging.warning('other platform support is under development, please update HOSTS manually and then use -r to update server cert.')
if not os.path.exists('CERT'):
os.mkdir('CERT')
if args.root:
print("Making root CA")
cm.create_root_ca()
importca.import_ca("CERT/root.crt")
if args.renewca or args.root or domainsupdate:
print("Making server certificate")
cm.create_certificate("CERT/server.crt", "CERT/server.key")
context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
try:
context.load_cert_chain("CERT/server.crt", "CERT/server.key")
except FileNotFoundError:
logging.error('cert not exist, please use --rr to create it')
try:
server = ThreadingTCPServer(server_address, ProxyHandler)
server.socket = context.wrap_socket(server.socket, server_side=True)
logging.info("server started at {}:{}".format(*server_address))
server.serve_forever()
except socket.error as e:
logging.error(e)
except KeyboardInterrupt:
server.shutdown()
sys.exit(0)