empowernow-common 3.4.4

Common utilities and FIPS-compliant cryptography for EmpowerNow packages

EmpowerNow Common SDK

The EmpowerNow Common SDK provides authentication helpers, configuration management and utilities shared across EmpowerNow micro-services and platform integrations.

pip install "empowernow-common[fastapi]"

Quick-start

Async OAuth

from empowernow_common import async_oauth

cfg = {
    "client_id": "svc",
    "client_secret": "***",
    "token_url": "https://auth.empowernow.io/oauth/token",
    "authorization_url": "https://auth.empowernow.io/oauth/authorize",
}

async with async_oauth(**cfg) as oauth:
    token = await oauth.get_token()
    print(token.access_token)

FastAPI integration

from fastapi import FastAPI, Depends
from empowernow_common.fastapi import build_auth_dependency

app = FastAPI()

# Create auth dependency for token validation
auth_dependency = build_auth_dependency(
    idps_yaml_path="/config/idps.yaml",
    default_idp_for_opaque="legacy"
)

@app.get("/protected")
async def protected_route(claims: dict = Depends(auth_dependency)):
    return {"user": claims["subject"]}

See the docs/ folder for full guides. For upgrading to the AuthZEN Draft‑04 API, read docs/authzen_migration_draft04.md.

Optional extras

• redis – distributed caches
• kafka – log sink and event bus
• metrics – Prometheus client
• fastapi – web-framework helpers

Development

git clone https://github.com/empowernow/empowernow-common.git
cd empowernow-common
pip install -e .[dev]
pre-commit install
pytest -q

Secret Loader

empowernow_common provides a zero-dependency helper to resolve secrets delivered as Docker/K8s secrets or environment variables.

from empowernow_common import load_secret

# read from /run/secrets/primary/db-password
password = load_secret("file:primary:db-password")

# read environment variable MY_API_KEY (dev only)
api_key = load_secret("env:MY_API_KEY")

Pointer grammar:

• file:<instance>:<id> – Reads <mount>/<instance>/<id> where mount defaults to /run/secrets or $FILE_MOUNT_PATH.
• filex:<instance>:<id> – Same as file: but returns rich structures: JSON objects or line-based key=value pairs are parsed into a dict.
• env:<VAR> – Returns the environment variable value.

Providers are pluggable:

from empowernow_common.secret_loader import register_provider

def vault_provider(path: str):
    ...
register_provider("vault", vault_provider)

Audit: pass audit_hook to load_secret to stream access events to Kafka/SIEM.

Shared Kafka Producer

The SDK includes an optional, zero-config Kafka helper so services can publish structured events without re-implementing connection logic.

from empowernow_common.kafka.platform_producer import publish_structured
from empowernow_common.kafka.topics import TOPICS

await publish_structured(
    "pdp.decisions",                     # event_type
    {"decision": "allow", "id": "123"},  # payload (JSON-serialisable)
    topic=TOPICS["pdp.decisions"],       # canonical topic
    key="123"                            # partition key (optional)
)

Key points:

• Optional dependency – install with pip install empowernow-common[kafka].
• Reads KAFKA_BOOTSTRAP_SERVERS, SERVICE_NAME, KAFKA_ENABLED env vars.
• No-ops automatically if Kafka is disabled or aiokafka isn’t installed.
• empowernow_common.kafka.topics provides a central map so topic names evolve without touching every service.
• Secret-access audit hook already uses the shared producer; you can register additional hooks via:

  from empowernow_common.kafka.platform_producer import publish
  

See kafka/platform_producer.py for full documentation and kafka/topics.py for the canonical topic list.

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© EmpowerNow, Inc. MIT License