Rampart Python Middleware

JWT verification middleware for Rampart IAM server. Supports FastAPI and Flask.

Installation

# Core (PyJWT + cryptography)
pip install rampart-python

# With FastAPI support
pip install rampart-python[fastapi]

# With Flask support
pip install rampart-python[flask]

FastAPI

Basic Authentication

from fastapi import Depends, FastAPI
from rampart import RampartClaims
from rampart.fastapi import rampart_auth

app = FastAPI()
auth = rampart_auth("https://auth.example.com")

@app.get("/me")
async def me(claims: RampartClaims = Depends(auth)):
    return {
        "user_id": claims.sub,
        "email": claims.email,
        "roles": claims.roles,
    }

Role-Based Access Control

from rampart.fastapi import rampart_auth, require_roles_from_claims

auth = rampart_auth("https://auth.example.com")
check_admin = require_roles_from_claims("admin")

@app.get("/admin/users")
async def list_users(claims: RampartClaims = Depends(auth)):
    check_admin(claims)  # Raises 403 if "admin" role is missing
    return {"users": ["..."]}

Flask

Basic Authentication

from flask import Flask, g
from rampart.flask import rampart_auth

app = Flask(__name__)

@app.route("/me")
@rampart_auth("https://auth.example.com")
def me():
    return {
        "user_id": g.auth.sub,
        "email": g.auth.email,
        "roles": g.auth.roles,
    }

Role-Based Access Control

from rampart.flask import rampart_auth, require_roles

@app.route("/admin/users")
@rampart_auth("https://auth.example.com")
@require_roles("admin")
def list_users():
    return {"users": ["..."]}

Direct Usage (No Framework)

from rampart import RampartAuth

auth = RampartAuth(issuer="https://auth.example.com")
claims = auth.verify_token(raw_jwt_string)

print(claims.sub)       # "user-123"
print(claims.email)     # "user@example.com"
print(claims.roles)     # ["admin", "user"]
print(claims.org_id)    # "org-456"

Claims

Verified tokens return a RampartClaims dataclass:

Configuration Options

RampartAuth(
    issuer="https://auth.example.com",  # Required: Rampart server URL
    audience="my-api",                   # Optional: expected audience claim
    jwks_cache_ttl=300,                  # JWKS cache lifetime in seconds (default: 300)
    algorithms=["RS256"],                # Allowed JWT algorithms (default: ["RS256"])
)

Running Tests

pip install -e ".[dev]"
pytest tests/