193 lines
6.8 KiB
Python
193 lines
6.8 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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proxy.py
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~~~~~~~~
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⚡⚡⚡ Fast, Lightweight, Programmable Proxy Server in a single Python file.
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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 unittest
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import socket
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import selectors
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import ssl
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from unittest import mock
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from typing import Any, cast
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from proxy.common.utils import bytes_
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from proxy.common.flags import Flags
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from proxy.common.utils import build_http_request, build_http_response
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from proxy.http.codes import httpStatusCodes
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from proxy.http.methods import httpMethods
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from proxy.http.handler import HttpProtocolHandler
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from proxy.http.proxy import HttpProxyPlugin
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from .utils import get_plugin_by_test_name
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class TestHttpProxyPluginExamplesWithTlsInterception(unittest.TestCase):
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@mock.patch('ssl.wrap_socket')
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@mock.patch('ssl.create_default_context')
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@mock.patch('proxy.http.proxy.TcpServerConnection')
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@mock.patch('subprocess.Popen')
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@mock.patch('selectors.DefaultSelector')
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@mock.patch('socket.fromfd')
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def setUp(self,
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mock_fromfd: mock.Mock,
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mock_selector: mock.Mock,
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mock_popen: mock.Mock,
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mock_server_conn: mock.Mock,
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mock_ssl_context: mock.Mock,
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mock_ssl_wrap: mock.Mock) -> None:
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self.mock_fromfd = mock_fromfd
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self.mock_selector = mock_selector
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self.mock_popen = mock_popen
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self.mock_server_conn = mock_server_conn
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self.mock_ssl_context = mock_ssl_context
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self.mock_ssl_wrap = mock_ssl_wrap
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self.fileno = 10
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self._addr = ('127.0.0.1', 54382)
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self.flags = Flags(
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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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self.plugin = mock.MagicMock()
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plugin = get_plugin_by_test_name(self._testMethodName)
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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 = mock.MagicMock(spec=socket.socket)
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mock_fromfd.return_value = self._conn
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self.protocol_handler = HttpProtocolHandler(
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self.fileno, self._addr, flags=self.flags)
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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 = mock.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 = mock.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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self.server.has_buffer.side_effect = has_buffer
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type(self.server).closed = mock.PropertyMock(side_effect=closed)
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type(
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self.server).connection = mock.PropertyMock(
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side_effect=mock_connection)
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)],
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[(selectors.SelectorKey(
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fileobj=self.client_ssl_connection,
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fd=self.client_ssl_connection.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)],
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[(selectors.SelectorKey(
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fileobj=self.server_ssl_connection,
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fd=self.server_ssl_connection.fileno,
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events=selectors.EVENT_WRITE,
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data=None), selectors.EVENT_WRITE)],
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[(selectors.SelectorKey(
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fileobj=self.server_ssl_connection,
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fd=self.server_ssl_connection.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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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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self.protocol_handler.run_once()
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self.mock_popen.assert_called()
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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.client.connection,
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self.client_ssl_connection)
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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.assertEqual(self.protocol_handler.client.buffer, b'')
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def test_modify_post_data_plugin(self) -> None:
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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-Type': b'application/x-www-form-urlencoded',
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b'Content-Length': bytes_(len(original)),
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},
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body=original
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)
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self.protocol_handler.run_once()
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self.server.queue.assert_called_with(
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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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)
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def test_man_in_the_middle_plugin(self) -> None:
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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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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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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 = \
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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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self.protocol_handler.run_once()
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self.assertEqual(
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self.protocol_handler.client.buffer,
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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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