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Auth & security at scale

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

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Auth & security at scale easy

How to Generate PKCE Code Challenge in Python

This Python script generates a PKCE code verifier and its corresponding S256 code challenge for secure OAuth2 authorization flows.

pkce oauth2 security
Python 
import base64
import hashlib
import os
import secrets
import string

def generate_code_verifier(length=64):
    alphabet = string.ascii_letters + string.digits + "-._~"
    return "".join(secrets.choice(alphabet) for _ in range(length))

def generate_code_challenge(code_verifier, method="S256"):
    if method == "S256…
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