vibrant-auth-middleware-fastapi 0.1.2

FastAPI authentication middleware with JWT verification and Azure integration

Vibrant Auth Middleware FastAPI

JWT authentication middleware with Azure integration for FastAPI applications.

Features

• JWT verification with automatic algorithm detection (HS256/RS256)
• Azure Key Vault integration for HS256 secrets
• Azure App Configuration integration for RS256 public keys
• FastAPI dependency injection support
• Cookie-based authentication support (access_token + token_type)
• Automatic fallback from Authorization header to cookies
• Caching for improved performance

Installation

pip install vibrant-auth-middleware-fastapi

Quick Start

from fastapi import FastAPI, Depends
from vibrant_auth_middleware import get_user_id

app = FastAPI()

@app.get("/protected")
def protected_route(user_id: str = Depends(get_user_id)):
    return {"user_id": user_id}

Configuration

Configure via environment variables:

HS256 (Symmetric Key)

# Option 1: Direct secret
JWT_SECRET_KEY=your-secret-key

# Option 2: Azure Key Vault
AZURE_KEY_VAULT_URI=https://your-vault.vault.azure.net/
AZURE_KEY_VAULT_JWT_SECRET=jwt-secret-key  # optional, default: "jwt-secret-key"

RS256 (Asymmetric Key)

# Option 1: Direct public key
JWT_PUBLIC_KEY="-----BEGIN PUBLIC KEY-----\n...\n-----END PUBLIC KEY-----"

# Option 2: Azure App Configuration
AZURE_APP_CONFIG_ENDPOINT=https://your-config.azconfig.io
# or
AZURE_APP_CONFIG_CONNECTION_STRING=Endpoint=...
AZURE_APP_CONFIG_JWT_KEY=jwt-public-key  # optional, default: "jwt-public-key"

JWT Verification Options

JWT_AUDIENCE=your-audience      # optional
JWT_ISSUER=your-issuer          # optional
JWT_LEEWAY=0                    # optional, seconds for time validation

Azure Authentication

APP_ENV=production  # Uses WorkloadIdentityCredential
APP_ENV=dev         # Uses DefaultAzureCredential (default)

API Reference

get_user_id

FastAPI dependency that extracts and validates user_id from JWT token. Supports both Authorization header and cookie-based authentication with automatic fallback.

Authentication methods (in order of priority):

1. Authorization header: Authorization: Bearer <token>
2. Cookies: access_token + token_type (token_type must be "Bearer")

@app.get("/me")
def get_me(user_id: str = Depends(get_user_id)):
    return {"user_id": user_id}

get_user

FastAPI dependency that extracts and validates the full JWT payload. Supports both Authorization header and cookie-based authentication with automatic fallback.

from vibrant_auth_middleware import get_user

@app.get("/me")
def get_me(user: dict = Depends(get_user)):
    return {"user": user}

get_user_id_from_cookie

FastAPI dependency that extracts and validates user_id exclusively from cookies. Requires both access_token and token_type cookies, where token_type must be "Bearer".

from vibrant_auth_middleware import get_user_id_from_cookie

@app.get("/me")
def get_me(user_id: str = Depends(get_user_id_from_cookie)):
    return {"user_id": user_id}

Expected cookies:

• access_token: The JWT token
• token_type: Must be "Bearer"

verify_jwt_token

Verify a JWT token and return its payload.

from vibrant_auth_middleware import verify_jwt_token

payload = verify_jwt_token(token)

get_user_id_from_token

Extract user_id from a verified JWT token.

from vibrant_auth_middleware import get_user_id_from_token

user_id = get_user_id_from_token(token)

get_token_payload

Get the full verified token payload.

from vibrant_auth_middleware import get_token_payload

payload = get_token_payload(token)

License

ISC