Reference library

Auth & security at scale

OAuth2, JWT, IAM patterns, secrets rotation, and least-privilege service auth.

3 matches

How to Implement Refresh Token Rotation in Python

A mock auth service that issues, rotates, and validates refresh tokens, revoking old tokens on reuse to prevent replay attacks.

auth oauth refresh-token

Python

import time
import hashlib
import secrets
from typing import Dict, Optional, Tuple


class MockTokenService:
    """Simulates refresh token rotation for a simple auth system."""

    def __init__(self):
        # Token hash -> (user_id, rotation_count, expires_at)
        self._active_tokens: Dict[str, Tuple[str, int,…

11 0 Open

Auth & security at scale medium

How to Implement a CSRF Token Double Submit Mock in Python

A mock CSRF protection class that generates and validates double-submit tokens using HMAC-SHA256 with a secret key.

csrf security hmac

Python

import hmac
import hashlib
import secrets


class CSRFProtection:
    def __init__(self, secret_key: str):
        self.secret_key = secret_key.encode("utf-8")

    def generate_token(self) -> str:
        random_value = secrets.token_hex(16)
        signature = hmac.new(
            self.secret_key, random_value.enco…

13 0 Open

Auth & security at scale medium

OAuth2 authorization code flow mock in Python

A minimal HTTP server that mocks the OAuth2 authorization code flow, issuing codes via /authorize and exchanging them for tokens at /token.

oauth2 http-server mock-server

Python

import json
from http.server import BaseHTTPRequestHandler, HTTPServer
from urllib.parse import urlparse, parse_qs

AUTH_CODE_STORE = {}
CLIENT_ID = "demo-client"
REDIRECT_URI = "http://localhost:8000/callback"

class OAuthHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        parsed = urlparse(self.path)
    …

15 0 Open

Browse by section

Each section groups closely related Python snippets.