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472 lines (387 loc) · 19.2 KB
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#!/usr/bin/env python3
# Allow direct execution
import os
import sys
import threading
import unittest
import pytest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import abc
import contextlib
import enum
import functools
import http.server
import json
import random
import socket
import struct
import time
from socketserver import (
BaseRequestHandler,
StreamRequestHandler,
ThreadingTCPServer,
)
from test.helper import http_server_port, verify_address_availability
from yt_dlp.networking import Request
from yt_dlp.networking.exceptions import ProxyError, TransportError
from yt_dlp.socks import (
SOCKS4_REPLY_VERSION,
SOCKS4_VERSION,
SOCKS5_USER_AUTH_SUCCESS,
SOCKS5_USER_AUTH_VERSION,
SOCKS5_VERSION,
Socks5AddressType,
Socks5Auth,
)
SOCKS5_USER_AUTH_FAILURE = 0x1
class Socks4CD(enum.IntEnum):
REQUEST_GRANTED = 90
REQUEST_REJECTED_OR_FAILED = 91
REQUEST_REJECTED_CANNOT_CONNECT_TO_IDENTD = 92
REQUEST_REJECTED_DIFFERENT_USERID = 93
class Socks5Reply(enum.IntEnum):
SUCCEEDED = 0x0
GENERAL_FAILURE = 0x1
CONNECTION_NOT_ALLOWED = 0x2
NETWORK_UNREACHABLE = 0x3
HOST_UNREACHABLE = 0x4
CONNECTION_REFUSED = 0x5
TTL_EXPIRED = 0x6
COMMAND_NOT_SUPPORTED = 0x7
ADDRESS_TYPE_NOT_SUPPORTED = 0x8
class SocksTestRequestHandler(BaseRequestHandler):
def __init__(self, *args, socks_info=None, **kwargs):
self.socks_info = socks_info
super().__init__(*args, **kwargs)
class SocksProxyHandler(BaseRequestHandler):
def __init__(self, request_handler_class, socks_server_kwargs, *args, **kwargs):
self.socks_kwargs = socks_server_kwargs or {}
self.request_handler_class = request_handler_class
super().__init__(*args, **kwargs)
class Socks5ProxyHandler(StreamRequestHandler, SocksProxyHandler):
# SOCKS5 protocol https://tools.ietf.org/html/rfc1928
# SOCKS5 username/password authentication https://tools.ietf.org/html/rfc1929
def handle(self):
sleep = self.socks_kwargs.get('sleep')
if sleep:
time.sleep(sleep)
version, nmethods = self.connection.recv(2)
assert version == SOCKS5_VERSION
methods = list(self.connection.recv(nmethods))
auth = self.socks_kwargs.get('auth')
if auth is not None and Socks5Auth.AUTH_USER_PASS not in methods:
self.connection.sendall(struct.pack('!BB', SOCKS5_VERSION, Socks5Auth.AUTH_NO_ACCEPTABLE))
self.server.close_request(self.request)
return
elif Socks5Auth.AUTH_USER_PASS in methods:
self.connection.sendall(struct.pack('!BB', SOCKS5_VERSION, Socks5Auth.AUTH_USER_PASS))
_, user_len = struct.unpack('!BB', self.connection.recv(2))
username = self.connection.recv(user_len).decode()
pass_len = ord(self.connection.recv(1))
password = self.connection.recv(pass_len).decode()
if username == auth[0] and password == auth[1]:
self.connection.sendall(struct.pack('!BB', SOCKS5_USER_AUTH_VERSION, SOCKS5_USER_AUTH_SUCCESS))
else:
self.connection.sendall(struct.pack('!BB', SOCKS5_USER_AUTH_VERSION, SOCKS5_USER_AUTH_FAILURE))
self.server.close_request(self.request)
return
elif Socks5Auth.AUTH_NONE in methods:
self.connection.sendall(struct.pack('!BB', SOCKS5_VERSION, Socks5Auth.AUTH_NONE))
else:
self.connection.sendall(struct.pack('!BB', SOCKS5_VERSION, Socks5Auth.AUTH_NO_ACCEPTABLE))
self.server.close_request(self.request)
return
version, command, _, address_type = struct.unpack('!BBBB', self.connection.recv(4))
socks_info = {
'version': version,
'auth_methods': methods,
'command': command,
'client_address': self.client_address,
'ipv4_address': None,
'domain_address': None,
'ipv6_address': None,
}
if address_type == Socks5AddressType.ATYP_IPV4:
socks_info['ipv4_address'] = socket.inet_ntoa(self.connection.recv(4))
elif address_type == Socks5AddressType.ATYP_DOMAINNAME:
socks_info['domain_address'] = self.connection.recv(ord(self.connection.recv(1))).decode()
elif address_type == Socks5AddressType.ATYP_IPV6:
socks_info['ipv6_address'] = socket.inet_ntop(socket.AF_INET6, self.connection.recv(16))
else:
self.server.close_request(self.request)
socks_info['port'] = struct.unpack('!H', self.connection.recv(2))[0]
# dummy response, the returned IP is just a placeholder
self.connection.sendall(struct.pack(
'!BBBBIH', SOCKS5_VERSION, self.socks_kwargs.get('reply', Socks5Reply.SUCCEEDED), 0x0, 0x1, 0x7f000001, 40000))
self.request_handler_class(self.request, self.client_address, self.server, socks_info=socks_info)
class Socks4ProxyHandler(StreamRequestHandler, SocksProxyHandler):
# SOCKS4 protocol http://www.openssh.com/txt/socks4.protocol
# SOCKS4A protocol http://www.openssh.com/txt/socks4a.protocol
def _read_until_null(self):
return b''.join(iter(functools.partial(self.connection.recv, 1), b'\x00'))
def handle(self):
sleep = self.socks_kwargs.get('sleep')
if sleep:
time.sleep(sleep)
socks_info = {
'version': SOCKS4_VERSION,
'command': None,
'client_address': self.client_address,
'ipv4_address': None,
'port': None,
'domain_address': None,
}
version, command, dest_port, dest_ip = struct.unpack('!BBHI', self.connection.recv(8))
socks_info['port'] = dest_port
socks_info['command'] = command
if version != SOCKS4_VERSION:
self.server.close_request(self.request)
return
use_remote_dns = False
if 0x0 < dest_ip <= 0xFF:
use_remote_dns = True
else:
socks_info['ipv4_address'] = socket.inet_ntoa(struct.pack('!I', dest_ip))
user_id = self._read_until_null().decode()
if user_id != (self.socks_kwargs.get('user_id') or ''):
self.connection.sendall(struct.pack(
'!BBHI', SOCKS4_REPLY_VERSION, Socks4CD.REQUEST_REJECTED_DIFFERENT_USERID, 0x00, 0x00000000))
self.server.close_request(self.request)
return
if use_remote_dns:
socks_info['domain_address'] = self._read_until_null().decode()
# dummy response, the returned IP is just a placeholder
self.connection.sendall(
struct.pack(
'!BBHI', SOCKS4_REPLY_VERSION,
self.socks_kwargs.get('cd_reply', Socks4CD.REQUEST_GRANTED), 40000, 0x7f000001))
self.request_handler_class(self.request, self.client_address, self.server, socks_info=socks_info)
class IPv6ThreadingTCPServer(ThreadingTCPServer):
address_family = socket.AF_INET6
class SocksHTTPTestRequestHandler(http.server.BaseHTTPRequestHandler, SocksTestRequestHandler):
def do_GET(self):
if self.path == '/socks_info':
payload = json.dumps(self.socks_info.copy())
self.send_response(200)
self.send_header('Content-Type', 'application/json; charset=utf-8')
self.send_header('Content-Length', str(len(payload)))
self.end_headers()
self.wfile.write(payload.encode())
class SocksWebSocketTestRequestHandler(SocksTestRequestHandler):
def handle(self):
import websockets.sync.server
protocol = websockets.ServerProtocol()
connection = websockets.sync.server.ServerConnection(socket=self.request, protocol=protocol, close_timeout=0)
connection.handshake()
connection.send(json.dumps(self.socks_info))
connection.close()
@contextlib.contextmanager
def socks_server(socks_server_class, request_handler, bind_ip=None, **socks_server_kwargs):
server = server_thread = None
try:
bind_address = bind_ip or '127.0.0.1'
server_type = ThreadingTCPServer if '.' in bind_address else IPv6ThreadingTCPServer
server = server_type(
(bind_address, 0), functools.partial(socks_server_class, request_handler, socks_server_kwargs))
server_port = http_server_port(server)
server_thread = threading.Thread(target=server.serve_forever)
server_thread.daemon = True
server_thread.start()
if '.' not in bind_address:
yield f'[{bind_address}]:{server_port}'
else:
yield f'{bind_address}:{server_port}'
finally:
server.shutdown()
server.server_close()
server_thread.join(2.0)
class SocksProxyTestContext(abc.ABC):
REQUEST_HANDLER_CLASS = None
def socks_server(self, server_class, *args, **kwargs):
return socks_server(server_class, self.REQUEST_HANDLER_CLASS, *args, **kwargs)
@abc.abstractmethod
def socks_info_request(self, handler, target_domain=None, target_port=None, **req_kwargs) -> dict:
"""return a dict of socks_info"""
class HTTPSocksTestProxyContext(SocksProxyTestContext):
REQUEST_HANDLER_CLASS = SocksHTTPTestRequestHandler
def socks_info_request(self, handler, target_domain=None, target_port=None, **req_kwargs):
request = Request(f'http://{target_domain or "127.0.0.1"}:{target_port or "40000"}/socks_info', **req_kwargs)
handler.validate(request)
return json.loads(handler.send(request).read().decode())
class WebSocketSocksTestProxyContext(SocksProxyTestContext):
REQUEST_HANDLER_CLASS = SocksWebSocketTestRequestHandler
def socks_info_request(self, handler, target_domain=None, target_port=None, **req_kwargs):
request = Request(f'ws://{target_domain or "127.0.0.1"}:{target_port or "40000"}', **req_kwargs)
handler.validate(request)
ws = handler.send(request)
ws.send('socks_info')
socks_info = ws.recv()
ws.close()
return json.loads(socks_info)
CTX_MAP = {
'http': HTTPSocksTestProxyContext,
'ws': WebSocketSocksTestProxyContext,
}
@pytest.fixture(scope='module')
def ctx(request):
return CTX_MAP[request.param]()
@pytest.mark.parametrize(
'handler,ctx', [
('Urllib', 'http'),
('Requests', 'http'),
('Websockets', 'ws'),
('CurlCFFI', 'http'),
], indirect=True)
class TestSocks4Proxy:
def test_socks4_no_auth(self, handler, ctx):
with handler() as rh:
with ctx.socks_server(Socks4ProxyHandler) as server_address:
response = ctx.socks_info_request(
rh, proxies={'all': f'socks4://{server_address}'})
assert response['version'] == 4
def test_socks4_auth(self, handler, ctx):
with handler() as rh:
with ctx.socks_server(Socks4ProxyHandler, user_id='user') as server_address:
with pytest.raises(ProxyError):
ctx.socks_info_request(rh, proxies={'all': f'socks4://{server_address}'})
response = ctx.socks_info_request(
rh, proxies={'all': f'socks4://user:@{server_address}'})
assert response['version'] == 4
def test_socks4a_ipv4_target(self, handler, ctx):
with ctx.socks_server(Socks4ProxyHandler) as server_address:
with handler(proxies={'all': f'socks4a://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='127.0.0.1')
assert response['version'] == 4
assert (response['ipv4_address'] == '127.0.0.1') != (response['domain_address'] == '127.0.0.1')
def test_socks4a_domain_target(self, handler, ctx):
with ctx.socks_server(Socks4ProxyHandler) as server_address:
with handler(proxies={'all': f'socks4a://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='localhost')
assert response['version'] == 4
assert response['ipv4_address'] is None
assert response['domain_address'] == 'localhost'
def test_ipv4_client_source_address(self, handler, ctx):
with ctx.socks_server(Socks4ProxyHandler) as server_address:
source_address = f'127.0.0.{random.randint(5, 255)}'
verify_address_availability(source_address)
with handler(proxies={'all': f'socks4://{server_address}'},
source_address=source_address) as rh:
response = ctx.socks_info_request(rh)
assert response['client_address'][0] == source_address
assert response['version'] == 4
@pytest.mark.parametrize('reply_code', [
Socks4CD.REQUEST_REJECTED_OR_FAILED,
Socks4CD.REQUEST_REJECTED_CANNOT_CONNECT_TO_IDENTD,
Socks4CD.REQUEST_REJECTED_DIFFERENT_USERID,
])
def test_socks4_errors(self, handler, ctx, reply_code):
with ctx.socks_server(Socks4ProxyHandler, cd_reply=reply_code) as server_address:
with handler(proxies={'all': f'socks4://{server_address}'}) as rh:
with pytest.raises(ProxyError):
ctx.socks_info_request(rh)
def test_ipv6_socks4_proxy(self, handler, ctx):
with ctx.socks_server(Socks4ProxyHandler, bind_ip='::1') as server_address:
with handler(proxies={'all': f'socks4://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='127.0.0.1')
assert response['client_address'][0] == '::1'
assert response['ipv4_address'] == '127.0.0.1'
assert response['version'] == 4
def test_timeout(self, handler, ctx):
with ctx.socks_server(Socks4ProxyHandler, sleep=2) as server_address:
with handler(proxies={'all': f'socks4://{server_address}'}, timeout=0.5) as rh:
with pytest.raises(TransportError):
ctx.socks_info_request(rh)
@pytest.mark.parametrize(
'handler,ctx', [
('Urllib', 'http'),
('Requests', 'http'),
('Websockets', 'ws'),
('CurlCFFI', 'http'),
], indirect=True)
class TestSocks5Proxy:
def test_socks5_no_auth(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
response = ctx.socks_info_request(rh)
assert response['auth_methods'] == [0x0]
assert response['version'] == 5
def test_socks5_user_pass(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler, auth=('test', 'testpass')) as server_address:
with handler() as rh:
with pytest.raises(ProxyError):
ctx.socks_info_request(rh, proxies={'all': f'socks5://{server_address}'})
response = ctx.socks_info_request(
rh, proxies={'all': f'socks5://test:testpass@{server_address}'})
assert response['auth_methods'] == [Socks5Auth.AUTH_NONE, Socks5Auth.AUTH_USER_PASS]
assert response['version'] == 5
def test_socks5_ipv4_target(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='127.0.0.1')
assert response['ipv4_address'] == '127.0.0.1'
assert response['version'] == 5
def test_socks5_domain_target(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='localhost')
assert (response['ipv4_address'] == '127.0.0.1') != (response['ipv6_address'] == '::1')
assert response['version'] == 5
def test_socks5h_domain_target(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5h://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='localhost')
assert response['ipv4_address'] is None
assert response['domain_address'] == 'localhost'
assert response['version'] == 5
def test_socks5h_ip_target(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5h://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='127.0.0.1')
assert response['ipv4_address'] == '127.0.0.1'
assert response['domain_address'] is None
assert response['version'] == 5
def test_socks5_ipv6_destination(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='[::1]')
assert response['ipv6_address'] == '::1'
assert response['version'] == 5
def test_ipv6_socks5_proxy(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler, bind_ip='::1') as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
response = ctx.socks_info_request(rh, target_domain='127.0.0.1')
assert response['client_address'][0] == '::1'
assert response['ipv4_address'] == '127.0.0.1'
assert response['version'] == 5
# XXX: is there any feasible way of testing IPv6 source addresses?
# Same would go for non-proxy source_address test...
def test_ipv4_client_source_address(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler) as server_address:
source_address = f'127.0.0.{random.randint(5, 255)}'
verify_address_availability(source_address)
with handler(proxies={'all': f'socks5://{server_address}'}, source_address=source_address) as rh:
response = ctx.socks_info_request(rh)
assert response['client_address'][0] == source_address
assert response['version'] == 5
@pytest.mark.parametrize('reply_code', [
Socks5Reply.GENERAL_FAILURE,
Socks5Reply.CONNECTION_NOT_ALLOWED,
Socks5Reply.NETWORK_UNREACHABLE,
Socks5Reply.HOST_UNREACHABLE,
Socks5Reply.CONNECTION_REFUSED,
Socks5Reply.TTL_EXPIRED,
Socks5Reply.COMMAND_NOT_SUPPORTED,
Socks5Reply.ADDRESS_TYPE_NOT_SUPPORTED,
])
def test_socks5_errors(self, handler, ctx, reply_code):
with ctx.socks_server(Socks5ProxyHandler, reply=reply_code) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}) as rh:
with pytest.raises(ProxyError):
ctx.socks_info_request(rh)
def test_timeout(self, handler, ctx):
with ctx.socks_server(Socks5ProxyHandler, sleep=2) as server_address:
with handler(proxies={'all': f'socks5://{server_address}'}, timeout=1) as rh:
with pytest.raises(TransportError):
ctx.socks_info_request(rh)
if __name__ == '__main__':
unittest.main()