KRIS

KRIS is a GUI program made to encrypt and decrypt messages with both symmetric and asymmetric ciphers. It implements RSA, AES, and KRIS cipher. The latter mixes the first two : it generates an AES key, used to encrypt the messages, and encrypts this key with RSA. This is useful as AES is way faster than RSA.

The name come from the esperanto for cryptosystem, "kriptosistemo" ("KRIptoSistemo").

Please note that that the AES and RSA implementations are home made, and have not been audited by anyone.

THIS PROGRAM IS PROVIDED "AS IS", WITHOUT ANY WARRANTY.

Features

Available ciphers :

• KRIS-AES-256 ;

• KRIS-AES-192 ;

• KRIS-AES-128 ;

• AES-256 (using CBC) ;

• AES-192 (using CBC) ;

• AES-128 (using CBC) ;

• RSA ;

• RSA signature ;

There are also hash functions. The list might depend on your system, you can get it with :

import hashlib
hashlib.algorithm_available

Main features are :

• Text encryption / decryption ;

• File encryption / decryption (Menu > File > File encryption, alt+ff) ;

• Hashing text ;

• RSA key management :

  • Generation (possible to protect the key with a password) ;
  • Get informations ;
  • Import / export ;
  • Rename ;
  • Change password / encrypt / decrypt ;

Requirements

KRIS is implemented mostly in python3 (using PyQt5 for the GUI), and in C (for the AES cipher).

You can either run the python script (source code), or run an executable (see release below). In the first case, you will need to install :

• Python3
• PyQt5

Otherwise you should be able to run the software by downloading the build version for your OS (Linux or Windows, compiled with pyinstaller or auto-py-to-exe) in releases.

Installing

You can download directly the source code, or the last release, as you prefer. If you don't want to download Python3 and PyQt5, you can download the last release zip file that contain a build version for your OS (Windows or Linux).

Source code

Download or clone the repository and make the launcher executable :

git clone https://github.com/lasercata/KRIS.git
cd KRIS
chmod +x KRIS_gui.py

Release

Go to the last release, and download the zip file for your OS. Then unzip it.

Running

In the main directory, run ./KRIS_gui.py to run the python script. Else you can run ./KRIS_gui for Linux build, or KRIS_gui.exe for Windows build.

RSA keys

You can manage RSA keys with the Keys menu. You can generate new ones, get info on them, export or import public keys, encrypt them, ...

The default location for the keys is the folder KRIS/Data/RSA_keys. It is useful if you transport KRIS on a usb stick. But if you use it only on your computer, you can activate the home mode, meaning that the keys will be copied in the folder ~/.RSA_keys. This is useful if you also use Cracker with home mode, or different versions of Cracker or KRIS (you won't have to copy the keys).

The home mode can be activated in the settings (Ctrl+R).

Authors

• Lasercata - Lasercata
• Elerias - Elerias

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details