267 lines
9.3 KiB
Python
267 lines
9.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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proxy.py
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~~~~~~~~
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⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
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Network monitoring, controls & Application development, testing, debugging.
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:copyright: (c) 2013-present by Abhinav Singh and contributors.
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:license: BSD, see LICENSE for more details.
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"""
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import ssl
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import socket
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import pytest
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import selectors
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from pytest_mock import MockerFixture
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from typing import Any, cast
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from proxy.common.flag import FlagParser
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from proxy.common.utils import bytes_, build_http_request, build_http_response
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from proxy.core.connection import TcpClientConnection, TcpServerConnection
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from proxy.http import httpMethods, httpStatusCodes, HttpProtocolHandler
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from proxy.http.proxy import HttpProxyPlugin
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from proxy.http.parser import HttpParser
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from .utils import get_plugin_by_test_name
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from ..test_assertions import Assertions
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class TestHttpProxyPluginExamplesWithTlsInterception(Assertions):
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@pytest.fixture(autouse=True) # type: ignore[misc]
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def _setUp(self, request: Any, mocker: MockerFixture) -> None:
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self.mock_fromfd = mocker.patch('socket.fromfd')
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self.mock_selector = mocker.patch('selectors.DefaultSelector')
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self.mock_sign_csr = mocker.patch('proxy.http.proxy.server.sign_csr')
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self.mock_gen_csr = mocker.patch('proxy.http.proxy.server.gen_csr')
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self.mock_gen_public_key = mocker.patch(
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'proxy.http.proxy.server.gen_public_key',
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)
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self.mock_server_conn = mocker.patch(
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'proxy.http.proxy.server.TcpServerConnection',
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)
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self.mock_ssl_context = mocker.patch('ssl.create_default_context')
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self.mock_ssl_wrap = mocker.patch('ssl.wrap_socket')
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self.mock_sign_csr.return_value = True
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self.mock_gen_csr.return_value = True
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self.mock_gen_public_key.return_value = True
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self.fileno = 10
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self._addr = ('127.0.0.1', 54382)
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self.flags = FlagParser.initialize(
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ca_cert_file='ca-cert.pem',
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ca_key_file='ca-key.pem',
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ca_signing_key_file='ca-signing-key.pem',
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threaded=True,
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)
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self.plugin = mocker.MagicMock()
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plugin = get_plugin_by_test_name(request.param)
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self.flags.plugins = {
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b'HttpProtocolHandlerPlugin': [HttpProxyPlugin],
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b'HttpProxyBasePlugin': [plugin],
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}
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self._conn = mocker.MagicMock(spec=socket.socket)
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self.mock_fromfd.return_value = self._conn
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self.protocol_handler = HttpProtocolHandler(
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TcpClientConnection(self._conn, self._addr), flags=self.flags,
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)
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self.protocol_handler.initialize()
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self.server = self.mock_server_conn.return_value
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self.server_ssl_connection = mocker.MagicMock(spec=ssl.SSLSocket)
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self.mock_ssl_context.return_value.wrap_socket.return_value = self.server_ssl_connection
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self.client_ssl_connection = mocker.MagicMock(spec=ssl.SSLSocket)
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self.mock_ssl_wrap.return_value = self.client_ssl_connection
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def has_buffer() -> bool:
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return cast(bool, self.server.queue.called)
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def closed() -> bool:
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return not self.server.connect.called
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def mock_connection() -> Any:
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if self.mock_ssl_context.return_value.wrap_socket.called:
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return self.server_ssl_connection
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return self._conn
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# Do not mock the original wrap method
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self.server.wrap.side_effect = \
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lambda x, y: TcpServerConnection.wrap(self.server, x, y)
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self.server.has_buffer.side_effect = has_buffer
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type(self.server).closed = mocker.PropertyMock(side_effect=closed)
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type(
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self.server,
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).connection = mocker.PropertyMock(
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side_effect=mock_connection,
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)
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self.mock_selector.return_value.select.side_effect = [
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[(
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selectors.SelectorKey(
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fileobj=self._conn.fileno(),
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fd=self._conn.fileno(),
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events=selectors.EVENT_READ,
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data=None,
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),
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selectors.EVENT_READ,
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)],
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[(
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selectors.SelectorKey(
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fileobj=self.client_ssl_connection.fileno(),
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fd=self.client_ssl_connection.fileno(),
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events=selectors.EVENT_READ,
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data=None,
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),
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selectors.EVENT_READ,
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)],
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[(
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selectors.SelectorKey(
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fileobj=self.server_ssl_connection.fileno(),
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fd=self.server_ssl_connection.fileno(),
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events=selectors.EVENT_WRITE,
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data=None,
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),
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selectors.EVENT_WRITE,
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)],
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[(
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selectors.SelectorKey(
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fileobj=self.server_ssl_connection.fileno(),
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fd=self.server_ssl_connection.fileno(),
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events=selectors.EVENT_READ,
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data=None,
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),
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selectors.EVENT_READ,
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)],
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]
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# Connect
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def send(raw: bytes) -> int:
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return len(raw)
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self._conn.send.side_effect = send
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self._conn.recv.return_value = build_http_request(
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httpMethods.CONNECT, b'uni.corn:443',
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)
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@pytest.mark.asyncio # type: ignore[misc]
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@pytest.mark.parametrize(
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'_setUp',
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(
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('test_modify_post_data_plugin'),
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),
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indirect=True,
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) # type: ignore[misc]
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async def test_modify_post_data_plugin(self) -> None:
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await self.protocol_handler._run_once()
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self.assertEqual(self.mock_sign_csr.call_count, 1)
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self.assertEqual(self.mock_gen_csr.call_count, 1)
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self.assertEqual(self.mock_gen_public_key.call_count, 1)
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self.mock_server_conn.assert_called_once_with('uni.corn', 443)
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self.server.connect.assert_called()
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self.assertEqual(
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self.protocol_handler.work.connection,
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self.client_ssl_connection,
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)
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self.assertEqual(self.server.connection, self.server_ssl_connection)
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self._conn.send.assert_called_with(
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HttpProxyPlugin.PROXY_TUNNEL_ESTABLISHED_RESPONSE_PKT,
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)
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self.assertFalse(self.protocol_handler.work.has_buffer())
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#
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original = b'{"key": "value"}'
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modified = b'{"key": "modified"}'
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self.client_ssl_connection.recv.return_value = build_http_request(
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b'POST', b'/',
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headers={
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b'Host': b'uni.corn',
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b'Content-Length': bytes_(len(original)),
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b'Content-Type': b'application/x-www-form-urlencoded',
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},
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body=original,
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)
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await self.protocol_handler._run_once()
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self.server.queue.assert_called_once()
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# pkt = build_http_request(
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# b'POST', b'/',
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# headers={
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# b'Host': b'uni.corn',
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# b'Content-Length': bytes_(len(modified)),
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# b'Content-Type': b'application/json',
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# },
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# body=modified,
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# )
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response = HttpParser.response(
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self.server.queue.call_args_list[0][0][0].tobytes(),
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)
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self.assertEqual(response.body, modified)
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@pytest.mark.asyncio # type: ignore[misc]
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@pytest.mark.parametrize(
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'_setUp',
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(
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('test_man_in_the_middle_plugin'),
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),
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indirect=True,
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) # type: ignore[misc]
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async def test_man_in_the_middle_plugin(self) -> None:
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await self.protocol_handler._run_once()
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self.assertEqual(self.mock_sign_csr.call_count, 1)
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self.assertEqual(self.mock_gen_csr.call_count, 1)
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self.assertEqual(self.mock_gen_public_key.call_count, 1)
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self.mock_server_conn.assert_called_once_with('uni.corn', 443)
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self.server.connect.assert_called()
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self.assertEqual(
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self.protocol_handler.work.connection,
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self.client_ssl_connection,
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)
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self.assertEqual(self.server.connection, self.server_ssl_connection)
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self._conn.send.assert_called_with(
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HttpProxyPlugin.PROXY_TUNNEL_ESTABLISHED_RESPONSE_PKT,
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)
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self.assertFalse(self.protocol_handler.work.has_buffer())
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#
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request = build_http_request(
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b'GET', b'/',
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headers={
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b'Host': b'uni.corn',
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},
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)
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self.client_ssl_connection.recv.return_value = request
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# Client read
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await self.protocol_handler._run_once()
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self.server.queue.assert_called_once_with(request)
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# Server write
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await self.protocol_handler._run_once()
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self.server.flush.assert_called_once()
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# Server read
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self.server.recv.return_value = memoryview(
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build_http_response(
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httpStatusCodes.OK,
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reason=b'OK', body=b'Original Response From Upstream',
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),
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)
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await self.protocol_handler._run_once()
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self.assertEqual(
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self.protocol_handler.work.buffer[0].tobytes(),
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build_http_response(
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httpStatusCodes.OK,
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reason=b'OK', body=b'Hello from man in the middle',
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),
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)
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