lylacore 0.1.5

Python bindings for Lylacore (soul-crypto + coach-engine)

Lylacore Python Bindings

Authors: Joysusy & Violet Klaudia 💖

Python bindings for Lylacore - cryptographic primitives and communication style coaching for AI agent identity systems.

Features

• soul-crypto: AES-256-GCM encryption with Argon2id/PBKDF2/Scrypt key derivation
• coach-engine: Communication style analysis and adaptation (coming soon)

Installation

pip install lylacore

Quick Start

import asyncio
import lylacore

async def main():
    # Generate a salt for key derivation
    salt = lylacore.Salt.generate()

    # Derive an encryption key from a passphrase
    key = await lylacore.derive_key("my-secure-passphrase", salt)

    # Encrypt some data
    plaintext = b"Secret message"
    nonce, ciphertext, auth_tag = lylacore.encrypt(plaintext, key)

    # Decrypt the data
    decrypted = lylacore.decrypt(ciphertext, key, nonce, auth_tag)
    assert decrypted == plaintext

    print("Encryption/decryption successful!")

asyncio.run(main())

API Reference

Classes

Salt

A 32-byte cryptographic salt for key derivation.

• Salt.generate() - Generate a new random salt
• Salt(data: bytes) - Create from existing bytes
• salt.as_bytes() - Get raw bytes

Nonce

A 12-byte nonce for AES-GCM encryption.

• Nonce.generate() - Generate a new random nonce
• Nonce(data: bytes) - Create from existing bytes
• nonce.as_bytes() - Get raw bytes

Key

A 32-byte encryption key.

• key.as_bytes() - Get raw bytes (handle with care!)

AuthTag

A 16-byte authentication tag for AES-GCM.

• AuthTag(data: bytes) - Create from existing bytes
• auth_tag.as_bytes() - Get raw bytes

DeriveKeyOptions

Configuration for key derivation.

• DeriveKeyOptions(algorithm="argon2id") - Options: "argon2id", "pbkdf2", "scrypt"

Functions

async derive_key(passphrase: str, salt: Salt, options: DeriveKeyOptions = None) -> Key

Derive an encryption key from a passphrase using a memory-hard KDF.

Parameters:

• passphrase - User's passphrase (UTF-8 string)
• salt - 32-byte salt (use Salt.generate() for new keys)
• options - Optional KDF configuration (defaults to argon2id)

Returns: A 32-byte encryption key

encrypt(plaintext: bytes, key: Key) -> tuple[Nonce, bytes, AuthTag]

Encrypt data using AES-256-GCM.

Parameters:

• plaintext - Data to encrypt
• key - Encryption key from derive_key()

Returns: Tuple of (nonce, ciphertext, auth_tag)

decrypt(ciphertext: bytes, key: Key, nonce: Nonce, auth_tag: AuthTag) -> bytes

Decrypt data using AES-256-GCM.

Parameters:

• ciphertext - Encrypted data
• key - Same key used for encryption
• nonce - Nonce from encrypt()
• auth_tag - Authentication tag from encrypt()

Returns: Original plaintext

Security Notes

• Never reuse a nonce with the same key
• Store salt, nonce, and auth_tag alongside ciphertext (they're safe to store publicly)
• Never log or display keys - use key.as_bytes() only when necessary
• Argon2id is recommended for new applications (best resistance against attacks)

Requirements

• Python 3.9+
• Works on Windows, macOS, and Linux

License

MIT License - see LICENSE file for details