c7d 0.1.0

Tiny Cisco Type 7 (c7) encoder/decoder with a CLI.

c7d

Tiny Cisco Type 7 (c7) encoder/decoder with a CLI.

⚠️ Security warning: Cisco Type 7 is a simple XOR obfuscation, not cryptography.Do not rely on it to protect secrets.

Installation

pip install c7d

Usage

CLI

# Decrypt a Type 7 string
c7d decrypt 060506324F41
# => cisco

# Encrypt plaintext (seed defaults to 00)
c7d encrypt cisco --seed 6
# => 060506324F41

Run without installation

uvx c7d --help

Library

from c7d import encrypt, decrypt

cipher = encrypt("cisco", seed=6)  # '060506324F41'
plain  = decrypt(cipher)            # 'cisco'

API

• c7d.encrypt(plain: str, seed: int = 0) -> str
• c7d.decrypt(x: str) -> str

Rationale

This implements the well-known Cisco Type 7 algorithm using the 53-character key string dsfd;kfoA,.iyewrkldJKDHSUBsgvca69834ncxv9873254k;fg87. The algorithm XORs each plaintext byte with a position-dependent character from this key, starting at an index based on a two-digit decimal seed (00–99). The output is the seed followed by uppercase hex bytes.

License

MIT