PyQuill

A simple CLI tool for encrypting and decrypting text.

Features

• Caesar cipher
• Atbash cipher

Installation

git clone https://github.com/Qu0i/PyQuill.git
cd PyQuill
# no dependencies — pure Python

Usage

# Caesar encrypt

python main.py caesar encrypt "Hello, World!" --shift 3 # -> Khoor, Zruog!

# Caesar decrypt

python main.py caesar decrypt "Khoor, Zruog!" --shift 3 # -> Hello, World!


# Atbash

python main.py atbash transform "Hello!" # -> Svool!

# Substitution cipher

python main.py substitution transform "Hello" --source-alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ --target-alphabet MNBVCXZLKJHGFDSAPOIUYTREWQ # -> Lcggs

Subcommands

Command	Description
caesar encrypt <text> --shift N	Encrypt text with shift N
caesar decrypt <text> --shift N	Decrypt text with shift N
atbash transform <text>	Transform text using Atbash cipher
substitution transform <text> --source-alphabet ... --target-alphabet ...	Custom substitution cipher

--shift is required only for Caesar cipher. Negative values and values larger than 26 wrap around correctly via modular arithmetic.

Different ciphers may use different actions depending on their algorithm type.

Tests

python -m pytest -q
# ..
# 3 passed in 0.00s

Project structure

PyQuill/
├── ciphers
│   ├── __init__.py
│   ├── caesar.py
│   └── substitution.py
├── commands
│   ├── __init__.py
│   ├── atbash.py
│   ├── caesar.py
│   └── substitution.py
├── main.py
├── tests
│   ├── __init__.py
│   ├── test_caesar.py
│   └── test_substitution.py
└── utility
    └── mapping.py

TODO

v 0.2

• Atbash cipher
• Substitution cipher

v 0.3

• Vigenère cipher
• File support

License

MIT — see LICENSE.