1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
import socket
from ._stream_async import AsyncSocketStream
from ._proto_socks5 import (
AuthMethod,
AuthMethodsRequest,
AuthMethodsResponse,
AuthRequest,
AuthResponse,
ConnectRequest,
ConnectResponse
)
class Socks5Proto:
def __init__(self, stream: AsyncSocketStream,
dest_host, dest_port, username=None, password=None,
rdns=None):
if rdns is None:
rdns = True
self._dest_port = dest_port
self._dest_host = dest_host
self._username = username
self._password = password
self._rdns = rdns
self._stream = stream
async def negotiate(self):
await self._socks_auth()
await self._socks_connect()
async def _socks_auth(self):
auth_method = await self._choose_auth_method()
# authenticate
if auth_method == AuthMethod.USERNAME_PASSWORD:
req = AuthRequest(
username=self._username,
password=self._password
)
await self._stream.write_all(bytes(req))
res = AuthResponse(await self._stream.read_exact(2))
res.validate()
async def _choose_auth_method(self) -> AuthMethod:
req = AuthMethodsRequest(
username=self._username,
password=self._password
)
await self._stream.write_all(bytes(req))
res = AuthMethodsResponse(await self._stream.read_exact(2))
res.validate(request=req)
return res.auth_method
async def _socks_connect(self):
req = ConnectRequest(
host=self._dest_host,
port=self._dest_port,
rdns=self._rdns
)
if req.need_resolve:
_, addr = await self._stream.resolver.resolve(
req.host,
family=socket.AF_UNSPEC
)
req.set_resolved_host(addr)
await self._stream.write_all(bytes(req))
res = ConnectResponse(await self._stream.read_exact(3))
res.validate()
# read remaining data (bind address)
await self._stream.read()
|
