mitm 1.0.0

Man-in-the-middle proxy with customizable options.

👨‍💻 mitm

A customizable man-in-the-middle TCP proxy with support for HTTP & HTTPS.

Installing

pip install mitm

Note that OpenSSL 1.1.1 or greater is required.

Documentation

Documentation can be found here.

Using

You can easily boot-up the proxy and start intercepting traffic:

from mitm import MITM, protocol, middleware, crypto

mitm = MITM(
    host="127.0.0.1",
    port=8888,
    protocols=[protocol.HTTP],
    middlewares=[middleware.Log],
    buffer_size=8192,
    timeout=5,
    ssl_context=crypto.mitm_ssl_context(),
    start=False,
)
mitm.start()

Above is the default values for the MITM class.

While the example above is sufficient for printing out incoming/outgoing messages, the bread and butter of mitm is the ability to add custom protocols and middlewares.

Protocols

mitm allows the addition of custom application-layer protocols that can be used to intercept and redirect traffic. Built-into the mitm library is the HTTP protocol (with TLS/CONNECT support). To read and understand more about protocols check out the documentations.

Middlewares

Custom middlewares allow programmatic customizations to incoming and outgoing requests. Middlewares can be used to modify the request, response, or both. To read and understand more about middlewares check out the documentation.

Example

Using the example above we can send a request to the server via another script:

import requests

proxies = {"http": "http://127.0.0.1:8888", "https": "http://127.0.0.1:8888"}
requests.get("https://httpbin.org/anything", proxies=proxies, verify=False)

Which will lead to the following being logged where mitm is running in:

2021-11-29 10:33:02 INFO     MITM started on 127.0.0.1:8888.
2021-11-29 10:33:03 INFO     Client 127.0.0.1:54771 has connected.
2021-11-29 10:33:03 INFO     Client to server:

	b'CONNECT httpbin.org:443 HTTP/1.0\r\n\r\n'

2021-11-29 10:33:03 INFO     Connected to server 18.232.227.86:443.
2021-11-29 10:33:03 INFO     Client to server:

	b'GET /anything HTTP/1.1\r\nHost: httpbin.org\r\nUser-Agent: python-requests/2.26.0\r\nAccept-Encoding: gzip, deflate\r\nAccept: */*\r\nConnection: keep-alive\r\n\r\n'

2021-11-29 10:33:03 INFO     Server to client:

	b'HTTP/1.1 200 OK\r\nDate: Mon, 29 Nov 2021 15:33:03 GMT\r\nContent-Type: application/json\r\nContent-Length: 396\r\nConnection: keep-alive\r\nServer: gunicorn/19.9.0\r\nAccess-Control-Allow-Origin: *\r\nAccess-Control-Allow-Credentials: true\r\n\r\n{\n  "args": {}, \n  "data": "", \n  "files": {}, \n  "form": {}, \n  "headers": {\n    "Accept": "*/*", \n    "Accept-Encoding": "gzip, deflate", \n    "Host": "httpbin.org", \n    "User-Agent": "python-requests/2.26.0", \n    "X-Amzn-Trace-Id": "Root=1-61a4f2af-2de4362101f0cab43f6407b1"\n  }, \n  "json": null, \n  "method": "GET", \n  "origin": "xxx.xx.xxx.xx", \n  "url": "https://httpbin.org/anything"\n}\n'

2021-11-29 10:33:08 INFO     Client has disconnected.
2021-11-29 10:33:08 INFO     Server has disconnected.