init

server.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2012 clowwindy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+PORT = 8499
+KEY = "foobar!"
+
+import socket
+import select
+import SocketServer
+import struct
+import string
+import hashlib
+
+def get_table(key):
+    m = hashlib.md5.new()
+    m.update(key)
+    s = m.digest()
+    (a, b) = struct.unpack('<QQ', s)
+    table = [c for c in string.maketrans('', '')]
+    for i in xrange(1, 1024):
+        table.sort(lambda x, y: int(a % (ord(x) + i) - a % (ord(y) + i)))
+    return table
+
+
+class ThreadingTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+    pass
+
+
+class Socks5Server(SocketServer.StreamRequestHandler):
+    def handle_tcp(self, sock, remote):
+        fdset = [sock, remote]
+        while True:
+            r, w, e = select.select(fdset, [], [])
+            if sock in r:
+                if remote.send(self.decrypt(sock.recv(4096))) <= 0: break
+            if remote in r:
+                if sock.send(self.encrypt(remote.recv(4096))) <= 0: break
+
+    def encrypt(self, data):
+        return data.translate(encrypt_table)
+
+    def decrypt(self, data):
+        return data.translate(decrypt_table)
+
+    def send_encrpyt(self, sock, data):
+        sock.send(self.encrypt(data))
+
+    def handle(self):
+        try:
+            print 'socks connection from ', self.client_address
+            sock = self.connection
+            sock.recv(262)
+            self.send_encrpyt(sock, "\x05\x00")
+            data = self.decrypt(self.rfile.read(4))
+            mode = ord(data[1])
+            addrtype = ord(data[3])
+            if addrtype == 1:
+                addr = socket.inet_ntoa(self.decrypt(self.rfile.read(4)))
+            elif addrtype == 3:
+                addr = self.decrypt(self.rfile.read(ord(self.decrypt(sock.recv(1)))))
+            else:
+                # not support
+                return
+            port = struct.unpack('>H', self.decrypt(self.rfile.read(2)))
+            reply = "\x05\x00\x00\x01"
+            try:
+                if mode == 1:
+                    remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+                    remote.connect((addr, port[0]))
+                    local = remote.getsockname()
+                    reply += socket.inet_aton(local[0]) + struct.pack(">H", local[1])
+                    print 'Tcp connect to', addr, port[0]
+                else:
+                    reply = "\x05\x07\x00\x01" # Command not supported
+                    print 'command not supported'
+            except socket.error:
+                # Connection refused
+                reply = '\x05\x05\x00\x01\x00\x00\x00\x00\x00\x00'
+            self.send_encrpyt(sock, reply)
+            if reply[1] == '\x00':
+                if mode == 1:
+                    self.handle_tcp(sock, remote)
+        except socket.error:
+            print 'socket error'
+
+
+def main():
+    server = ThreadingTCPServer(('', PORT), Socks5Server)
+    server.allow_reuse_address = True
+    print "starting server at port %d ..." % PORT
+    server.serve_forever()
+
+if __name__ == '__main__':
+    encrypt_table = ''.join(get_table(KEY))
+    decrypt_table = string.maketrans(encrypt_table, string.maketrans('', ''))
+    main()