openclaw - 💡(How to fix) Fix [Proposal] VaultSeal: Encryption-as-a-Service [1 comments, 2 participants]

pip install fastapi cryptography hashicorp-vault

from fastapi import FastAPI, File, UploadFile
from cryptography.fernet import Fernet
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.hkdf import HKDF

app = FastAPI()

# Load master key from passphrase or key file
def load_master_key():
    # Implement key loading logic here
    pass

# Derive encryption key from master key using HKDF
def derive_encryption_key(master_key):
    hkdf = HKDF(
        algorithm=hashes.SHA256(),
        length=32,
        salt=None,
        info=b'vaultseal',
    )
    return hkdf.derive(master_key)

# Encrypt file
@app.post("/encrypt")
async def encrypt_file(file: UploadFile = File(...)):
    master_key = load_master_key()
    encryption_key = derive_encryption_key(master_key)
    f = Fernet(encryption_key)
    encrypted_data = f.encrypt(await file.read())
    return {"encrypted_data": encrypted_data}

# Decrypt file
@app.post("/decrypt")
async def decrypt_file(file: UploadFile = File(...)):
    master_key = load_master_key()
    encryption_key = derive_encryption_key(master_key)
    f = Fernet(encryption_key)
    decrypted_data = f.decrypt(await file.read())
    return {"decrypted_data": decrypted_data}

import logging

# Set up logging configuration
logging.basicConfig(filename='vaultseal_audit.log', level=logging.INFO)

# Log crypto operations
def log_operation(operation, data):
    logging.info(f"{operation} - {data}")