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CipherChat

CipherChat is a Java-based project that utilizes the Maven build system and JavaFX library. The application allows users to communicate and exchange data between computers in a secure way using the RSA algorithm to generate keys, SHA-256 to create a hash of user passwords, and AES to encrypt data. Implementations of all cryptographic algorithms used in the application were taken from the javax.crypto library. Communication is established using the TCP protocol. Every message is prepended by sending an encrypted message header. Communication is bidirectional. The encrypted messages are split into 1024-byte chunks, which are sent synchronously.

Login View

This is the login screen where users enter their password to access the application.

Login View

Chat View

This is the main chat screen where users can send and receive encrypted messages and files.

Chat View

Prerequisites

  • Java Development Kit 17 (JDK)
  • Maven

Project Structure

The project is structured as follows:

  • src/main/java/pl/projekt/bsk: This is the main package of the project. It contains the main classes and controllers for the application.
  • src/main/java/pl/projekt/bsk/connection: This package contains classes for establishing a connection between the client and the server. It also handles the sending and receiving of messages.
  • src/main/java/pl/projekt/bsk/utils: This package contains utility classes for encryption and decryption.

Key Classes

  • EncryptionUtils: This class provides various static methods for encryption and decryption tasks.
  • LogInController: This class handles the login functionality of the application.