🔗 p2pshare – Secure, Encrypted, Parallel P2P File Sharing CLI

📌 Overview

p2pshare is a Node.js CLI tool for secure, resumable, parallel peer-to-peer file sharing.
Built with TCP sockets and event-driven architecture, it allows multiple peers to send chunks of a file simultaneously, encrypted end-to-end.

✨ Features

• 🔒 AES Encryption for file data + RSA Encryption for key exchange
• ⚡ Parallel Multi-Peer Downloads with file chunking
• 📊 Real-time progress tracking (bytes sent/received + %)
• ⏯ Pause & Resume functionality for transfers
• 🔁 Event-driven architecture leveraging Node.js non-blocking I/O
• ✅ Integrity verification using SHA-256 hashes

🛠 Tech Stack

• Node.js – Event-driven runtime
• net – TCP networking
• crypto – AES + RSA encryption
• fs – File system operations
• commander – CLI command parsing

🚀 Installation

npm install -g p2pshare

📦 Usage

Sender

To send a file, simply specify the file path. The tool will start a server and wait for receivers.

p2pshare send <file-path>

• Encrypts the file using AES-256.
• Listens on a port for incoming connections from receivers.
• Sends the file to all connected peers in parallel.

Receiver

To receive a file, provide the sender's IP address, port, and the desired destination path.

p2pshare receive <sender-ip> <port> <destination-path>

• Connects to the sender.
• Downloads the encrypted file.
• Decrypts and saves the file to the specified path.

🌐 Example Flow

Scenario: User A has a large file (movie.mp4) and wants to share it with User B and User C.

[ You (A) ]
     |
     |  (Chunks via TCP)
     v
[ Friend B ] <----+
     |            |
(Chunks via TCP)  | (This is the P2P part:
     |            |  B becomes a sender for C)
     v            |
[ Friend C ] <----+

1. User A (Sender):

   • Runs p2pshare send movie.mp4.
   • The tool encrypts the file and waits for connections on port 5000.

2. User B (Receiver 1):

   • Runs p2pshare receive <User-A-IP> 5000 "D:\movies\movie.mp4".
   • Starts downloading the file from User A.

3. User C (Receiver 2):

   • Runs p2pshare receive <User-A-IP> 5000 "C:\downloads\movie.mp4".
   • Also starts downloading the file from User A, at the same time as User B.