125 lines
3.8 KiB
Python
Executable File
125 lines
3.8 KiB
Python
Executable File
#!/usr/bin/python
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'''
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Python WebSocket library with support for "wss://" encryption.
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You can make a cert/key with openssl using:
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openssl req -new -x509 -days 365 -nodes -out self.pem -keyout self.pem
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as taken from http://docs.python.org/dev/library/ssl.html#certificates
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'''
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import sys, socket, ssl, traceback
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from base64 import b64encode, b64decode
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client_settings = {}
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send_seq = 0
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server_handshake = """HTTP/1.1 101 Web Socket Protocol Handshake\r
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Upgrade: WebSocket\r
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Connection: Upgrade\r
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WebSocket-Origin: %s\r
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WebSocket-Location: %s://%s%s\r
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WebSocket-Protocol: sample\r
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\r
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"""
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policy_response = """<cross-domain-policy><allow-access-from domain="*" to-ports="*" /></cross-domain-policy>\n"""
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def traffic(token="."):
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sys.stdout.write(token)
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sys.stdout.flush()
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def decode(buf):
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""" Parse out WebSocket packets. """
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if buf.count('\xff') > 1:
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if client_settings["b64encode"]:
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return [b64decode(d[1:]) for d in buf.split('\xff')]
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else:
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# Modified UTF-8 decode
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return [d[1:].replace("\xc4\x80", "\x00").decode('utf-8').encode('latin-1') for d in buf.split('\xff')]
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else:
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if client_settings["b64encode"]:
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return [b64decode(buf[1:-1])]
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else:
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return [buf[1:-1].replace("\xc4\x80", "\x00").decode('utf-8').encode('latin-1')]
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def encode(buf):
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global send_seq
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if client_settings["b64encode"]:
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buf = b64encode(buf)
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else:
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# Modified UTF-8 encode
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buf = buf.decode('latin-1').encode('utf-8').replace("\x00", "\xc4\x80")
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if client_settings["seq_num"]:
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send_seq += 1
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return "\x00%d:%s\xff" % (send_seq-1, buf)
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else:
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return "\x00%s\xff" % buf
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def do_handshake(sock):
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global client_settings, send_seq
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send_seq = 0
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# Peek, but don't read the data
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handshake = sock.recv(1024, socket.MSG_PEEK)
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#print "Handshake [%s]" % repr(handshake)
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if handshake.startswith("<policy-file-request/>"):
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handshake = sock.recv(1024)
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print "Sending flash policy response"
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sock.send(policy_response)
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sock.close()
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return False
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elif handshake.startswith("\x16"):
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retsock = ssl.wrap_socket(
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sock,
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server_side=True,
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certfile='self.pem',
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ssl_version=ssl.PROTOCOL_TLSv1)
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scheme = "wss"
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print "Using SSL/TLS"
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else:
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retsock = sock
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scheme = "ws"
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print "Using plain (not SSL) socket"
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handshake = retsock.recv(4096)
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req_lines = handshake.split("\r\n")
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_, path, _ = req_lines[0].split(" ")
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_, origin = req_lines[4].split(" ")
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_, host = req_lines[3].split(" ")
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# Parse settings from the path
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cvars = path.partition('?')[2].partition('#')[0].split('&')
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client_settings = {'b64encode': None, 'seq_num': None}
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for cvar in [c for c in cvars if c]:
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name, _, value = cvar.partition('=')
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client_settings[name] = value and value or True
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print "client_settings:", client_settings
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retsock.send(server_handshake % (origin, scheme, host, path))
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return retsock
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def start_server(listen_port, handler):
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lsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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lsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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lsock.bind(('', listen_port))
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lsock.listen(100)
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while True:
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try:
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csock = None
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print 'waiting for connection on port %s' % listen_port
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startsock, address = lsock.accept()
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print 'Got client connection from %s' % address[0]
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csock = do_handshake(startsock)
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if not csock: continue
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handler(csock)
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except Exception:
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print "Ignoring exception:"
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print traceback.format_exc()
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if csock: csock.close()
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