Starbucks Captive Portal Checker

A checker for making sure the process of starbucks captive portal.

This is a hackathon project of IETF 100 Hackathon.

Author: aoimidori27@gmail.com note351@hotmail.com

Presentation

Stage1 - Get .pcap file

1. Go to Starbucks Cafe
2. Turn off your wifi, close the browser
3. Starting to capture packets by toos(such as wireshark, tcpdump) on wifi interface
4. Turn on your wifi
5. Open browser
6. Create one tab in the browser and click access wifi
7. Access any website
8. Stop capturing packets, and save the .pcap file

Stage2 - Run checker

0. Make sure the environment

   • Language: python3.6
   • Operating System: MacOS

1. Clone this project to your local machine

$ git clone git@github.com:note35/starbucks_captive_portal_checker.git
$ cd starbucks_captive_portal_checker

2. Install prerequisite

$ brew install https://raw.githubusercontent.com/secdev/scapy/master/.travis/pylibpcap.rb

3. Create virtual environment

$ virtualenv -p /usr/local/bin/python3.6 env3
$ . env3/bin/activate
$ pip3 install -r requirement.txt

4. Set path config in config.ini

[PATH]
PCAP_INPUT_PATH = example.pcap
JSON_OUTPUT_PATH = example.json

5. Run checker

python3.6 checker.py

FSM flow

DHCP -> HTTP302 -> Change Cipher Spec -> HTTP200

DHCP example:

{
    "cnt": 50,
    "host address": "10.4.150.35",
    "protocol": "DHCP",
    "time": 1510450337.902647
}

HTTP example:

{
    "cnt": 512,
    "dst": "10.4.150.35",
    "protocol": "HTTP",
    "ret_code": 302,
    "time": 1510450379.816324
}

HTTPS example:

{
    "cnt": 627,
    "content_type": "Change Cipher Spec",
    "handshake_type": "Client Hello",
    "protocol": "HTTPS",
    "time": 1510450380.62389
}