chat-program

Simple encrypted socket chat experiments in Python and C++.

Files

• Server.py: TCP chat server on port 4242. Receives Fernet-encrypted messages and broadcasts them to the other clients.
• Client.py: Python client that connects to the configured server and sends/receives encrypted messages.
• Client.cpp: C++ client experiment.
• KeyGen.py: helper for generating a Fernet key.

Requirements

• Python 3.x
• cryptography

Install the Python dependency with:

pip install -r requirements.txt

Usage

Generate a Fernet key:

python KeyGen.py

Export the key before starting server and client:

export CHAT_FERNET_KEY="paste-generated-key-here"

Start the server:

python Server.py

Start one or more clients:

python Client.py

Type messages in the client terminal. Use exit to close a client.

Notes

• Server.py is the server start file.
• Client.py is the client start file.
• .env.example lists the supported environment variables.
• The Fernet key is read from CHAT_FERNET_KEY and should not be committed.