H3C Client For SYSU East Campus

NOTE: Because a bug(You can't inject packet using python version of pcap after sleep or reboot.) exists in my modified fork of YaH3C. Thus, I rewrote H3C in C to avoid the bug of pcap in python. Tested in OSX.

Installation

1. Download this repository
2. Install libpcap
3. Change the username, password, device_name in main.c
4. cd into this directory and make
5. Run sysuh3c, you are ready to go

Sequence Diagram

# Login
---> Start
<--- Request, Identity
---> Response, Identity
<--- Request, EAP-MD5-CHALLENGE
---> Response, EAP-MD5-CHALLENGE
<--- Some unknown code
<--- Success

# Then enter random check loop
<--- Request, Identity
---> Response, Identity

# Logoff
# Not responding to random check loop also results in auto-logoff
---> Logoff
<--- Failure

Request ID, version hash + username

EAP-MD5-CHALLENGE, num + username

num is calculated by ( (first 16 character of case-sensitive password) xor (16 bytes md5 data converted to decimal) )

Thanks to...

• 华为H3C iNode客户端802.1X协议的分析和破解
• 中山大学东校区校园网认证的客户端（非官方）YaH3C
• 西电北校区校园网客户端Linux CLI版 xd-h3c
• My Fork of YaH3C
• Apple pcap man page
• Using libpcap C