Pyvmess

Pyvmess is a naive implementation to parse raw vmess package in Python. Note: As vmess is such a complicated protocol, it's quite hard to implement full feature decoder. There are quite a lot of cases which are covered by Pyvmess.

As this package is likely to be outdated, you can refer to vmess source code server code and client code if needed.

Table of Contents

• Installation
• Usage
• Build
• Tests
• License

Installation

pip install pyvmess

Usage

Let's take one challenge dieyingchongchong from qwb2022 as an example. Pyvmess can parse meta data from header and decode data from body. The following example can be found in test cases.

from uuid import UUID

import pyvmess


client_uuid = UUID("b831381d-6324-4d53-ad4f-8cda48b30811")
with open("data/client.bin", "rb") as f:
    client_data = f.read()

client_package = pyvmess.ClientVmessPackage(client_uuid, client_data)

timestamp = client_package.auth(1615528982 + 100)

client_package.decode_header()

client_package.decode_body()

print(b"".join(client_package.body_data).decode())

with open("tests/data/server.bin", "rb") as f:
    server_data = f.read()

server_package = pyvmess.ServerVmessPackage(
    client_package.response_header,
    client_package.body_iv,
    client_package.body_key,
    client_package.option,
    client_package.security,
    server_data,
)

server_package.decode_header()

server_package.decode_body()

print(b"".join(server_package.body_data).decode())

Build

Pyvmess uses hatch as the project manager. You can use hatch or any other build tools compliant with PEP517 such as build.

# hatch
hatch build

# build
python -m build

Tests

Pyvmess uses pytest for testing. You can run tests as follows.

hatch run test

License

pyvmess is distributed under the terms of the MIT license.