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🛡️ Secure Emergency File Backup & Exfiltration Tool 🛡️

IronBridge is a high-performance Client-Server security solution designed to safely encrypt and exfiltrate critical files directly to a remote server.

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✨ Key Features

• Hybrid Cryptography: Combines fast symmetric encryption (AES-256 CFB) for file data with asymmetric encryption (RSA-2048) for secure key transfer.
• Native Windows API: Utilizes Windows BCrypt for cryptography and WinHTTP for network communication without external heavy C libraries.
• Memory Mapping: Uses CreateFileMapping and MapViewOfFile to map files directly into RAM for optimal reading performance.
• Chunked Streaming: Automatically splits large files into 10MB chunks to ensure stable HTTP transport.

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🛠️️ Build & Setup

1. Client (C / Windows)

Requires a C compiler on Windows with access to system libraries (bcrypt.lib, winhttp.lib).

Using GCC (MinGW):

cd Client
gcc src/main.c src/core.c src/ui.c -o IronBridge.exe -I include -lbcrypt -lwinhttp

Using MSVC (cl.exe):

cd Client
cl.exe /I include src\*.c /link bcrypt.lib winhttp.lib /out:IronBridge.exe

2. Server (Python / Flask)

cd Server
python -m venv venv
venv\Scripts\activate
pip install -r requirements.txt

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⚠️️ Important Configurations

• Server Endpoint: The client connects to 127.0.0.1:5000 by default. Update the host IP in Client/src/core.c inside the WinHttpConnect function if running over a network.
• RSA Keypair: The RSA public key is hardcoded in Client/src/core.c (rsa_pub_blob), and its matching private key must be located at Server/private_key.pem.

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🚀 Execution & Output

Step 1: Start the Server

cd Server
python app.py

Output: Server listens on http://127.0.0.1:5000.

Step 2: Run the Client

cd Client
IronBridge.exe

Sample Interactive Console Output:

========================================
      IRON BRIDGE - Security Tool       
========================================
[+] Enter path (directory/file) (1)
[+] Help (2)
[+] About (3)

Enter option(1/2/3) : 1
[+] Please enter the full path to the file/directory:
> C:\Users\DedSec\Documents\Important.docx

[*] Initializing memory mapping for file: 'C:\Users\DedSec\Documents\Important.docx'
[INFO] File Size: 154820 bytes
[+] File successfully loaded into RAM!
[+] AES Key successfully encrypted with RSA!
[*] Sending Important.docx in 1 chunks...
    -> Sending chunk 1/1 (154820 bytes)...
[+] Network handles closed safely.

Server Console Output:

[*] Decrypted chunk 1/1 for 'Important.docx'
[+] File 'Important.docx' fully assembled and decrypted!