sealium 1.2.3

Secure license key generation, software activation, and hardware binding.

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🔒 Sealium

Secure license key generation, software activation, and hardware binding.

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✨ Features

Feature	Description
🔐 Hybrid Encryption	RSA-4096-OAEP key wrapping + AES-256-GCM payload
🎫 License Keys	Cryptographically secure random keys (128-bit)
💻 Hardware Binding	Bind licenses to specific machines (SHA-256 fingerprint)
⏰ Expiration Control	Set expiry dates and feature flags
🛡️ Anti-Replay	Timestamp window + nonce deduplication
🌐 Client-Server	Ready-to-use FastAPI backend
🔁 Idempotent	Same machine may reactivate safely

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📦 Installation

pip install sealium

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🚀 Quick Example

from sealium.client.activator import Activator

# Client only needs the server's PUBLIC key.
activator = Activator(
    server_url="http://localhost:8000/v1/activation",
    server_public_key_pem=open("data/server_public.pem").read(),
)

response = activator.activate("your-license-key")

if response.result == "success":
    print(f"✅ Activated until {response.authorized_until}")
    print(f"   Features: {response.features}")
else:
    print(f"❌ {response.error_msg}")

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🧱 Architecture

src/sealium/
├── common/        # Shared primitives (crypto, models, machine_code, time_source)
├── client/        # Activator + hybrid-encryption key manager
├── server/        # FastAPI app factory, routes, services, database, config
│   ├── routes/    # Thin HTTP layer
│   ├── services/  # activation_service, replay_guard (pure, injectable)
│   └── ...
└── scripts/       # generate_keys, generate_activation_codes

Key principle: no import side effects. Importing the package performs no I/O, no network calls, no hardware reads. Server resources (private key, DB) are initialized in the FastAPI lifespan and are injectable for testing.

See src/docs/mechanism.md for the full protocol specification.

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🔧 Requirements

• Python 3.13+
• cryptography, requests, fastapi, uvicorn (wmi on Windows only)

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🧪 Testing

pip install -e ".[dev]"
pytest

The test suite runs fully offline: the FastAPI server is driven in-process via TestClient, the database is a throwaway SQLite file, and the timestamp source is injected — no live server or network required.

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🛡️ Deployment Hardening

Sealium is designed to run behind a reverse proxy / firewall, not exposed bare to the public network:

• Bind address — defaults to 0.0.0.0; restrict via HOST=127.0.0.1 when running co-located with the proxy.
• TLS — the app-layer hybrid encryption protects every payload end-to-end, but you should still terminate TLS at the reverse proxy (with HSTS) to hide metadata.
• Rate limiting — enabled by default (RATE_LIMIT_ENABLED, 60 req / 60 s per IP); tune via RATE_LIMIT_MAX_REQUESTS / RATE_LIMIT_WINDOW_SECONDS. In multi-worker deployments the limiter is per-process — inject a shared backend for global limits.
• Docs — /docs, /redoc, /openapi.json are auto-disabled when DEBUG=false.
• Key material — data/server_private.pem and the SQLite DB are created with 0600 permissions; never commit them (already gitignored).
• Multi-worker caveat — the in-memory replay guard and rate limiter are per-process; for cross-worker consistency, inject a shared store (Redis).

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📄 License

MIT © 2026 Kevin Orson Hsu

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