BinChat is an encrypted chat application written in C, designed with a modular architecture that makes it easy to extend with new components in the future. It leverages multi-threading for efficient client management, ensuring smooth performance even with multiple active users.
For security, BinChat uses asymmetric encryption (public-key cryptography) during session key exchange and symmetric encryption (stream/block cipher) for encrypting individual messages, providing both secure key distribution and fast message encryption.
Binchat/
├── include/
│ ├── globals.h # Header for global variables
│ ├── main.h # Header for shared constants
│ ├── libraries.h # Header for imported c libraries
│ ├── crypto.h # Header for crypto functions
│ ├── server.h # Header for server
│ ├── client.h # Header for client
│ └── utils.h # Header for utility functions
├── src/
│ ├── server.c # Server module
│ ├── client.c # Client module
│ ├── crypto.c # Source file crypto functions
│ ├── logging.c # Source file for logging management
│ ├── globals.c # Source file for initialized global variables
│ └── utils.c # Source file for utility functions
├── keys/
│ ├── rsa_public.pem # RSA public key in PEM format
│ └── rsa_private # RSA private key in PEM format
├── build/
│ ├── server # Server executable binary
│ └── client # Client executable binary
├── build.sh # Build script for compiling the project
└── README.md # Project documentation
Firstly Generate Keys
# Here we are generating 2048bit key.
ssh-keygen -t rsa -b 2048 -f key_rsaConvert them to PEM Format
ssh-keygen -f key_rsa.pub -e -m PEM > key_rsa.pem # public key
ssh-keygen -p -m PEM -f key_rsa # private keyEdit globals.c file with the location of the newly created keys.
Clone the repo and run build.sh file.
git clone https://github.com/Avichiii/BinChat.git
cd BinChat
chmod u+x build.sh
./build.shCurrently I don't have a proper logging mechanism. i'll add it in the future.