Reference library

Auth & security at scale

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

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Auth & security at scale medium

ACME LetsEncrypt Mock Challenge Server in Python

A minimal HTTP server that serves key authorizations for ACME/Let's Encrypt DNS-01 or HTTP-01 challenges during testing and validation.

acme letsencrypt http-server
Python 
from http.server import HTTPServer, BaseHTTPRequestHandler
import json

# In-memory store simulating the ACME challenge token -> key authorization pair
challenge_store = {
    "token_example": "token_example.key_authorization"
}

class AcmeChallengeHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        # Extra…
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