CryptoZero

Lightweight & modular helper Python library for Cryptography CTF challenges.

Features

• Ciphers: RSA
• Encodings: Base64, Hex, URL
• Attacks: Fermat, Wiener, Small exponent, Pohlig Hellman
• Utilities: Byte manipulation, math helpers (egcd, modinv)

Installation

pip install . -e

Roadmap

• Fermat attack
• Wiener attack
• Small e attack
• Pohlig-Hellman
• Various Encodings
• Shortcut for calculating phi
• Diffie-Hellman Cipher Implementation
• Hastad attack
• Tonelli Shanks
• mt19937 cracking utility
• More RSA attacks
• More Diffie-Hellman attacks
• Proper documentation
• ECC