sphincsplus GUI Tool

This is a simple graphical user interface (GUI) for the PySPX SPHINCS+ (the post-quantum digital signature scheme) implementation using Python pyspx and tkinter.

Features

• Generate SPHINCS+ keypair using selectable variants (e.g. shake_128f, sha2_192s, etc.)
• view seed, keys and their lengths
• Upload and view the plaintext message
• Sign the message using the generated keypair
• Save the digital signature to file
• Upload the message and saved signature to verify the sign is VALID or INVALID
• Reset the application to select a different variant and restart the process

Installation and Usage

Prerequisites (Ubuntu)

• before running this GUI, make sure you have OpenSSl development libraries, Python 3.9 and later and tkinter package:

sudo apt update
sudo apt install libssl-dev build-essential
sudo apt install python3-tk

Make Virtual Environment and Setup pyspx package

• To make virtual enviroment:

python3 -m venv sphincs_env
source sphincs_env/bin/activate

• Installing pyspx (Python binding for SPHINCS+) that is avalable in PySPX:

pip install pyspx

Or you can install python dependencies

pip install -r requirements.txt

Run the GUI

python3 gui_sphincs.py

Workflow

1. Select a "SPHINCS+ Variant" from the dropdown menu.

2. Click "Generate Keypair" to create a new keypair by using a random seed.
3. Click "Upload Message" and select a plaintext .txt file to be signed Sample of Message.
4. Click "Sign Message" to digitally sign the message.
5. Click "Save Signature" to save the signature to a .sig file.
6. Click "Verify Signature" to validate the uploaded message and signature.

7. Click "Reset" to start over and choose another variant.

Notes

• Each varient of SPHINCS+ has different seed/key/signature lengths.
• The application restricts each process to a single run per variant to avoid confusion.
• The random seed is generated using Python's os.urandom().
• This GUI uses the pyspx Python binding for SPHINCS+.
• If you encounter any OpenSSl or compilation issues, verify that libssl-dev is installed on your system.