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410 lines
17 KiB
Python
410 lines
17 KiB
Python
#!/usr/bin/env python
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"""SocksiPy - Python SOCKS module.
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Version 1.00
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Copyright 2006 Dan-Haim. All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of Dan Haim nor the names of his contributors may be used
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to endorse or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY DAN HAIM "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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EVENT SHALL DAN HAIM OR HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMANGE.
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This module provides a standard socket-like interface for Python
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for tunneling connections through SOCKS proxies.
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"""
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"""
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Minor modifications made by Miroslav Stampar (http://sqlmap.org/)
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for patching DNS-leakage occuring in socket.create_connection()
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Minor modifications made by Christopher Gilbert (http://motomastyle.com/)
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for use in PyLoris (http://pyloris.sourceforge.net/)
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Minor modifications made by Mario Vilas (http://breakingcode.wordpress.com/)
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mainly to merge bug fixes found in Sourceforge
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"""
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import socket
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import struct
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PROXY_TYPE_SOCKS4 = 1
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PROXY_TYPE_SOCKS5 = 2
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PROXY_TYPE_HTTP = 3
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_defaultproxy = None
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_orgsocket = socket.socket
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_orgcreateconnection = socket.create_connection
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class ProxyError(Exception): pass
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class GeneralProxyError(ProxyError): pass
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class Socks5AuthError(ProxyError): pass
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class Socks5Error(ProxyError): pass
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class Socks4Error(ProxyError): pass
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class HTTPError(ProxyError): pass
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_generalerrors = ("success",
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"invalid data",
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"not connected",
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"not available",
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"bad proxy type",
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"bad input")
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_socks5errors = ("succeeded",
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"general SOCKS server failure",
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"connection not allowed by ruleset",
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"Network unreachable",
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"Host unreachable",
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"Connection refused",
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"TTL expired",
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"Command not supported",
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"Address type not supported",
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"Unknown error")
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_socks5autherrors = ("succeeded",
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"authentication is required",
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"all offered authentication methods were rejected",
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"unknown username or invalid password",
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"unknown error")
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_socks4errors = ("request granted",
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"request rejected or failed",
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"request rejected because SOCKS server cannot connect to identd on the client",
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"request rejected because the client program and identd report different user-ids",
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"unknown error")
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def setdefaultproxy(proxytype=None, addr=None, port=None, rdns=True, username=None, password=None):
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"""setdefaultproxy(proxytype, addr[, port[, rdns[, username[, password]]]])
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Sets a default proxy which all further socksocket objects will use,
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unless explicitly changed.
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"""
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global _defaultproxy
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_defaultproxy = (proxytype, addr, port, rdns, username, password)
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def wrapmodule(module):
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"""wrapmodule(module)
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Attempts to replace a module's socket library with a SOCKS socket. Must set
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a default proxy using setdefaultproxy(...) first.
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This will only work on modules that import socket directly into the namespace;
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most of the Python Standard Library falls into this category.
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"""
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if _defaultproxy != None:
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module.socket.socket = socksocket
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module.socket.create_connection = create_connection
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else:
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raise GeneralProxyError((4, "no proxy specified"))
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def unwrapmodule(module):
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module.socket.socket = _orgsocket
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module.socket.create_connection = _orgcreateconnection
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class socksocket(socket.socket):
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"""socksocket([family[, type[, proto]]]) -> socket object
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Open a SOCKS enabled socket. The parameters are the same as
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those of the standard socket init. In order for SOCKS to work,
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you must specify family=AF_INET, type=SOCK_STREAM and proto=0.
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"""
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def __init__(self, family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0, _sock=None):
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_orgsocket.__init__(self, family, type, proto, _sock)
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if _defaultproxy != None:
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self.__proxy = _defaultproxy
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else:
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self.__proxy = (None, None, None, None, None, None)
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self.__proxysockname = None
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self.__proxypeername = None
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def __recvall(self, count):
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"""__recvall(count) -> data
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Receive EXACTLY the number of bytes requested from the socket.
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Blocks until the required number of bytes have been received.
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"""
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data = self.recv(count)
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while len(data) < count:
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d = self.recv(count-len(data))
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if not d: raise GeneralProxyError((0, "connection closed unexpectedly"))
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data = data + d
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return data
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def setproxy(self, proxytype=None, addr=None, port=None, rdns=True, username=None, password=None):
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"""setproxy(proxytype, addr[, port[, rdns[, username[, password]]]])
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Sets the proxy to be used.
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proxytype - The type of the proxy to be used. Three types
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are supported: PROXY_TYPE_SOCKS4 (including socks4a),
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PROXY_TYPE_SOCKS5 and PROXY_TYPE_HTTP
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addr - The address of the server (IP or DNS).
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port - The port of the server. Defaults to 1080 for SOCKS
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servers and 8080 for HTTP proxy servers.
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rdns - Should DNS queries be preformed on the remote side
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(rather than the local side). The default is True.
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Note: This has no effect with SOCKS4 servers.
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username - Username to authenticate with to the server.
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The default is no authentication.
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password - Password to authenticate with to the server.
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Only relevant when username is also provided.
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"""
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self.__proxy = (proxytype, addr, port, rdns, username, password)
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def __negotiatesocks5(self, destaddr, destport):
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"""__negotiatesocks5(self,destaddr,destport)
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Negotiates a connection through a SOCKS5 server.
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"""
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# First we'll send the authentication packages we support.
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if (self.__proxy[4]!=None) and (self.__proxy[5]!=None):
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# The username/password details were supplied to the
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# setproxy method so we support the USERNAME/PASSWORD
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# authentication (in addition to the standard none).
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self.sendall(struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02))
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else:
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# No username/password were entered, therefore we
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# only support connections with no authentication.
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self.sendall(struct.pack('BBB', 0x05, 0x01, 0x00))
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# We'll receive the server's response to determine which
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# method was selected
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chosenauth = self.__recvall(2)
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if chosenauth[0:1] != chr(0x05).encode():
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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# Check the chosen authentication method
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if chosenauth[1:2] == chr(0x00).encode():
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# No authentication is required
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pass
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elif chosenauth[1:2] == chr(0x02).encode():
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# Okay, we need to perform a basic username/password
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# authentication.
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self.sendall(chr(0x01).encode() + chr(len(self.__proxy[4])) + self.__proxy[4] + chr(len(self.__proxy[5])) + self.__proxy[5])
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authstat = self.__recvall(2)
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if authstat[0:1] != chr(0x01).encode():
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# Bad response
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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if authstat[1:2] != chr(0x00).encode():
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# Authentication failed
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self.close()
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raise Socks5AuthError((3, _socks5autherrors[3]))
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# Authentication succeeded
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else:
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# Reaching here is always bad
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self.close()
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if chosenauth[1] == chr(0xFF).encode():
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raise Socks5AuthError((2, _socks5autherrors[2]))
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else:
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raise GeneralProxyError((1, _generalerrors[1]))
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# Now we can request the actual connection
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req = struct.pack('BBB', 0x05, 0x01, 0x00)
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# If the given destination address is an IP address, we'll
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# use the IPv4 address request even if remote resolving was specified.
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try:
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ipaddr = socket.inet_aton(destaddr)
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req = req + chr(0x01).encode() + ipaddr
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except socket.error:
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# Well it's not an IP number, so it's probably a DNS name.
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if self.__proxy[3]:
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# Resolve remotely
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ipaddr = None
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req = req + chr(0x03).encode() + chr(len(destaddr)).encode() + destaddr
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else:
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# Resolve locally
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ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
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req = req + chr(0x01).encode() + ipaddr
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req = req + struct.pack(">H", destport)
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self.sendall(req)
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# Get the response
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resp = self.__recvall(4)
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if resp[0:1] != chr(0x05).encode():
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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elif resp[1:2] != chr(0x00).encode():
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# Connection failed
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self.close()
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if ord(resp[1:2])<=8:
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raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])]))
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else:
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raise Socks5Error((9, _socks5errors[9]))
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# Get the bound address/port
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elif resp[3:4] == chr(0x01).encode():
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boundaddr = self.__recvall(4)
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elif resp[3:4] == chr(0x03).encode():
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resp = resp + self.recv(1)
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boundaddr = self.__recvall(ord(resp[4:5]))
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else:
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self.close()
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raise GeneralProxyError((1,_generalerrors[1]))
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boundport = struct.unpack(">H", self.__recvall(2))[0]
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self.__proxysockname = (boundaddr, boundport)
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if ipaddr != None:
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self.__proxypeername = (socket.inet_ntoa(ipaddr), destport)
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else:
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self.__proxypeername = (destaddr, destport)
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def getproxysockname(self):
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"""getsockname() -> address info
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Returns the bound IP address and port number at the proxy.
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"""
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return self.__proxysockname
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def getproxypeername(self):
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"""getproxypeername() -> address info
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Returns the IP and port number of the proxy.
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"""
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return _orgsocket.getpeername(self)
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def getpeername(self):
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"""getpeername() -> address info
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Returns the IP address and port number of the destination
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machine (note: getproxypeername returns the proxy)
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"""
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return self.__proxypeername
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def __negotiatesocks4(self,destaddr,destport):
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"""__negotiatesocks4(self,destaddr,destport)
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Negotiates a connection through a SOCKS4 server.
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"""
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# Check if the destination address provided is an IP address
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rmtrslv = False
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try:
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ipaddr = socket.inet_aton(destaddr)
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except socket.error:
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# It's a DNS name. Check where it should be resolved.
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if self.__proxy[3]:
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ipaddr = struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01)
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rmtrslv = True
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else:
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ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
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# Construct the request packet
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req = struct.pack(">BBH", 0x04, 0x01, destport) + ipaddr
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# The username parameter is considered userid for SOCKS4
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if self.__proxy[4] != None:
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req = req + self.__proxy[4]
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req = req + chr(0x00).encode()
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# DNS name if remote resolving is required
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# NOTE: This is actually an extension to the SOCKS4 protocol
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# called SOCKS4A and may not be supported in all cases.
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if rmtrslv:
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req = req + destaddr + chr(0x00).encode()
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self.sendall(req)
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# Get the response from the server
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resp = self.__recvall(8)
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if resp[0:1] != chr(0x00).encode():
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# Bad data
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self.close()
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raise GeneralProxyError((1,_generalerrors[1]))
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if resp[1:2] != chr(0x5A).encode():
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# Server returned an error
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self.close()
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if ord(resp[1:2]) in (91, 92, 93):
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self.close()
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raise Socks4Error((ord(resp[1:2]), _socks4errors[ord(resp[1:2]) - 90]))
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else:
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raise Socks4Error((94, _socks4errors[4]))
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# Get the bound address/port
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self.__proxysockname = (socket.inet_ntoa(resp[4:]), struct.unpack(">H", resp[2:4])[0])
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if rmtrslv != None:
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self.__proxypeername = (socket.inet_ntoa(ipaddr), destport)
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else:
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self.__proxypeername = (destaddr, destport)
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def __negotiatehttp(self, destaddr, destport):
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"""__negotiatehttp(self,destaddr,destport)
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Negotiates a connection through an HTTP server.
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"""
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# If we need to resolve locally, we do this now
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if not self.__proxy[3]:
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addr = socket.gethostbyname(destaddr)
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else:
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addr = destaddr
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self.sendall(("CONNECT " + addr + ":" + str(destport) + " HTTP/1.1\r\n" + "Host: " + destaddr + "\r\n\r\n").encode())
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# We read the response until we get the string "\r\n\r\n"
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resp = self.recv(1)
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while resp.find("\r\n\r\n".encode()) == -1:
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resp = resp + self.recv(1)
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# We just need the first line to check if the connection
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# was successful
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statusline = resp.splitlines()[0].split(" ".encode(), 2)
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if statusline[0] not in ("HTTP/1.0".encode(), "HTTP/1.1".encode()):
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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try:
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statuscode = int(statusline[1])
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except ValueError:
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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if statuscode != 200:
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self.close()
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raise HTTPError((statuscode, statusline[2]))
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self.__proxysockname = ("0.0.0.0", 0)
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self.__proxypeername = (addr, destport)
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def connect(self, destpair):
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"""connect(self, despair)
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Connects to the specified destination through a proxy.
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destpar - A tuple of the IP/DNS address and the port number.
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(identical to socket's connect).
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To select the proxy server use setproxy().
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"""
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# Do a minimal input check first
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if (not type(destpair) in (list,tuple)) or (len(destpair) < 2) or (type(destpair[0]) != type('')) or (type(destpair[1]) != int):
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raise GeneralProxyError((5, _generalerrors[5]))
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if self.__proxy[0] == PROXY_TYPE_SOCKS5:
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if self.__proxy[2] != None:
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portnum = self.__proxy[2]
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else:
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portnum = 1080
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_orgsocket.connect(self, (self.__proxy[1], portnum))
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self.__negotiatesocks5(destpair[0], destpair[1])
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elif self.__proxy[0] == PROXY_TYPE_SOCKS4:
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if self.__proxy[2] != None:
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portnum = self.__proxy[2]
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else:
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portnum = 1080
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_orgsocket.connect(self,(self.__proxy[1], portnum))
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self.__negotiatesocks4(destpair[0], destpair[1])
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elif self.__proxy[0] == PROXY_TYPE_HTTP:
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if self.__proxy[2] != None:
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portnum = self.__proxy[2]
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else:
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portnum = 8080
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_orgsocket.connect(self,(self.__proxy[1], portnum))
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self.__negotiatehttp(destpair[0], destpair[1])
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elif self.__proxy[0] == None:
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_orgsocket.connect(self, (destpair[0], destpair[1]))
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else:
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raise GeneralProxyError((4, _generalerrors[4]))
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def create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
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source_address=None):
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# Patched for a DNS-leakage
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host, port = address
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sock = None
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try:
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sock = socksocket(socket.AF_INET, socket.SOCK_STREAM)
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if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
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sock.settimeout(timeout)
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if source_address:
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sock.bind(source_address)
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sock.connect(address)
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except socket.error:
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if sock is not None:
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sock.close()
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raise
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return sock
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