caitaozhan/cse534-project

CSE534 Project: break the great firewall

CSE 534 Project: SbuSocks

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Requirements:

• Python3
• OmegaSwitch for Chrome or Proxifier

Run SbuSocks

server-side:

python server.py config_path

The default path of config_path is ./server_config.json

The server configuration contains the following fields

    "local_addr":"0.0.0.0",
    "local_port":"xxxx",
    "key":"xxxxxxxxxx"

"local_addr":"0.0.0.0" means the server is listening all in-coming IPv4 traffic

"local_port" is the port the server listens on.

"key" is used to generate a key to encrypt and decrypt message between the server and the client.

client-side:

python server.py config_path

The default path of config_path is ./client_config.json

The server configuration contains the following fields

    "server_addr":"xxx.xxx.xxx.xxx",
    "server_port":"xxxx",
    "local_addr":"127.0.0.1",
    "local_port":"1081",
    "key":"xxxxxxx"

"server_addr" is the server IP address.

"server_port" is the server listening port.

"local_addr":"127.0.0.1" means the client is listening all in-coming local IPv4 traffic.

"local_port" is the port the client listens on.

"key" is used to generate a key to encrypt and decrypt message between the server and the client. This key should be the same with the key on the server.

Use SbuSocks

We assume applications support socks5 protocol. Chrome with OmegaSwitch extension support socks5. And using Proxifier, we can make all applications support socks5.

The configuration of Omega is as follows:

Mechanism

SbuSocks' Architecture:

Finite-state machine model of client TCP Relay:

Finite-state machine model of server TCP Relay: