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