FileTransferProtocol

Overview

This project demonstrates the implementation of a secure file transfer system using Python's socket and ssl libraries, showcasing encrypted data transmission between a client and a server over a network.

Client File

The client script is responsible for initiating a secure connection to the server and transmitting a specified file's contents. Here's a detailed breakdown of its functionality:

• Importing Required Modules: Utilizes the socket, ssl, and time modules for network communication and encryption.
• Setting Up Connection Parameters:
  • IP: Determines the host machine's IP address to facilitate communication over a local network.
  • PORT: Designates port number 4455, which the server listens on for incoming connections.
  • ADDR: A tuple that combines IP and PORT to specify the server's network address.
  • FORMAT: Specifies "utf-8" encoding for data transmission.
  • SIZE: Defines the buffer size for data reception, set to 1024 bytes.
• Main Functionality:
  • Initiates a TCP socket and establishes a secure connection to the server.
  • Handles file operations for reading the contents of project.txt and transmits this data to the server.
  • Manages communication to send the file name and data to the server and prints server responses.

Server File

The server script sets up a listening service that accepts encrypted file transmissions from clients, saving received files appropriately. Detailed operation includes:

• Importing Required Modules: Incorporates socket, ssl, time, and os modules for networking, encryption, and file management.
• Setting Up Connection Parameters:
  • Similar to the client, with additions for SSL context setup using a certificate (server.crt) and a private key (server.key).
• Main Functionality:
  • Initializes a server socket that binds to the specified IP address and port, then listens for incoming connections.
  • Accepts connections, securely wraps them using SSL, and processes received file name and data to save on the server.
  • Provides feedback to the client and handles multiple client connections in a loop.

Security Note

The implementation, as designed, skips hostname verification and certificate validation for SSL connections, which is intended for demonstration and testing purposes only. For real-world applications, proper SSL certificate handling and verification mechanisms should be implemented.

Running the Project

1. Server Setup: Start the server script first to ensure it's ready to accept connections:

   python Server.py

2. Client Setup: Start the client script :

   python client.py