commit 270f173deddd2e3dded794d23306f1f32b78d400 Author: Sean Robinson seankrobinson@gmail.com Date: Mon Dec 17 20:03:29 2012 -0700

Add SocksPatch to socksify network-using Python code

A context manager which helps re-direct network socket traffic, from existing code, through the tor process.

Signed-off-by: Sean Robinson seankrobinson@gmail.com --- test/network.py | 39 +++++++++++++++++++++++++++++++++++++-- 1 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/test/network.py b/test/network.py index 6ab17f5..6f81e9d 100644 --- a/test/network.py +++ b/test/network.py @@ -8,13 +8,20 @@ the tor network. +- SocksError - Reports problems returned by the SOCKS proxy.

Socks - Communicate through a SOCKS5 proxy with a socket interface + + SocksPatch - Force socket-using code to use :class: `~test.network.Socks` """

+import functools import socket import struct

import stem.util.connection

+# Store a reference to the original class so we can find it after +# monkey patching. +_socket_socket = socket.socket + SOCKS5_NOAUTH_GREETING = (0x05, 0x01, 0x00) SOCKS5_NOAUTH_RESPONSE = (0x05, 0x00) SOCKS5_CONN_BY_IPV4 = (0x05, 0x01, 0x00, 0x01) @@ -52,7 +59,7 @@ class SocksError(ProxyError): code = self.code return "[%s] %s" % (code, self._ERROR_MESSAGE[code])

-class Socks(socket.socket): +class Socks(_socket_socket): """ A **socket.socket**-like interface through a SOCKS5 proxy connection. Tor does not support proxy authentication, so neither does this class. @@ -181,7 +188,7 @@ class Socks(socket.socket): :raises: :class:`test.SocksError` for any errors """

- socket.socket.connect(self, (self._proxy_addr[0], self._proxy_addr[1])) + _socket_socket.connect(self, (self._proxy_addr[0], self._proxy_addr[1])) # ask for non-authenticated connection self.sendall(self._ints_to_bytes(SOCKS5_NOAUTH_GREETING)) response = self._bytes_to_ints(self._recvall(2)) @@ -211,3 +218,31 @@ class Socks(socket.socket):

raise NotImplementedError

+class SocksPatch(object): + """ + Monkey-patch **socket.socket** to use :class:`~test.network.Socks`, instead. + Classes in the patched context (e.g. urllib.urlopen in the example below) + do not use the SOCKS5 proxy for domain name resolution and such information + may be leaked. + + :: + + import urllib + from test.network import SocksPatch + + with SocksPatch(('127.0.0.1', 9050)): + with urllib.urlopen("https://www.torproject.org") as f: + for line in f.readline(): + print line + """ + + def __init__(self, *args, **kwargs): + self._partial = functools.partial(Socks, *args, **kwargs) + + def __enter__(self): + socket.socket = self._partial + return self + + def __exit__(self, exit_type, value, traceback): + socket.socket = _socket_socket +